JP2004001438A - Head control method, display device manufacturing method and device therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To discharge ink from each ink nozzle in conformity with an ink dot interval of any specification by one scanning with the use of an existing head having a plurality of ink nozzles arranged in a line. <P>SOLUTION: The head 1 is inclined so that the ink dot interval in a direction Y by each ink discharge from each of ink nozzles n<SB>0</SB>-n<SB>n</SB>of the head 1 becomes an arbitrary pitch (150 μm). The head 1 is moved in the state while inclined, and a second count value corresponding to a desired ink dot interval (150 μm) in a direction X is set. When ink nozzles n<SB>0</SB>-n<SB>n</SB>reach preliminarily set ink dot positions d<SB>1</SB>, d<SB>11</SB>, d<SB>21</SB>and d<SB>n1</SB>respectively by the movement of the head 1, ink is repeatedly discharged from each of ink nozzles n<SB>0</SB>-n<SB>n</SB>every time a moving distance of the head 1 reaches a distance corresponding to the count value. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention provides a head control method for controlling the timing of ink ejection from each ink nozzle of a head having a plurality of ink nozzles arranged in a line, and a color filter and the like used for a display device employing this head control method. The present invention relates to a method and apparatus for manufacturing a display device for applying, for example, R (red), G (green), and B (blue) inks to an ink application target.
[0002]
[Prior art]
For example, in order to manufacture a color filter used for a display device, R (red), G (green), or B (blue) ink is applied in a grid pattern to a substrate of the color filter. For application of these inks, for example, an ink jet coating apparatus provided with a head (multi-nozzle head) having a plurality of ink nozzles arranged in a line is used. Of these, the head is manufactured exclusively for each type of display device, and is used for applications in which the intervals between ink dots (ink application positions) are constant.
[0003]
However, the intervals of the ink dots of the color filter are different depending on the type of display device, and the intervals of the ink dots to be printed may be arbitrarily changed. In this case, it is conceivable to manufacture a head having an arbitrary ink dot interval. However, there is a problem in manufacturing the head independently because of various know-hows. In addition, even if the head is outsourced to a head manufacturer, the development period of the outsourced head is required to be long, which may be a bottleneck when commercializing the head in a short time.
[0004]
As a method of solving such a problem, for example, there is a method of shortening the interval between ink dots by tilting a head as described in Patent Document 1. According to this method, an arbitrary ink dot interval can be realized using an existing head, and therefore, there is an advantage that the time required for developing a display device model can be reduced.
[0005]
[Patent Document 1]
JP-A-9-101412
[0006]
[Problems to be solved by the invention]
However, in the above method, the positions of the ink nozzles are not arranged in a direction perpendicular to the moving direction (scanning direction) of the head because the head is tilted, so that ink cannot be ejected from each ink nozzle at the same time.
[0007]
Further, in the above method, the ink ejection timing is determined by the CPU in accordance with the initial position of the head and the moving distance of the head. There is a disadvantage that the ink dot interval is slightly different. For this reason, it has been proposed to eject ink one ink nozzle at a time. However, in the case of a large number of ink dots, it takes a lot of time to manufacture a color filter of a display device, which leads to deterioration of manufacturing efficiency. I have.
[0008]
Accordingly, the present invention provides a head control that can eject ink from each ink nozzle at an arbitrary specified ink dot interval in a single scan using an existing head having a plurality of ink nozzles arranged in a line. It is an object of the present invention to provide a method of manufacturing a display device for applying ink to an ink application target of the display device using the head control method, and a device therefor.
[0009]
[Means for Solving the Problems]
The present invention is directed to a head control method for controlling the timing of ink ejection from each ink nozzle of a head in which a plurality of ink nozzles are arranged in a line, the head control method comprising: Tilting the head so that the ink application pitch becomes an arbitrary pitch, moving the head and the ink application target relatively in the other direction in this inclined state, and applying the desired ink in the other direction on the ink application target A count value corresponding to the pitch is held, and after each ink nozzle reaches a preset ink discharge start position by relative movement between the head and the ink application target, the relative movement between the head and the ink application target is set. A process of repeatedly discharging ink from the ink nozzles each time the moving distance reaches a distance corresponding to the count value A head control method having.
[0010]
The present invention provides a head control method for providing a plurality of heads in which a plurality of ink nozzles are arranged in a line at predetermined intervals and controlling the timing of ink ejection from each ink nozzle of these heads. Tilting a plurality of heads so that the ink application pitch in one direction on the ink application target by ink ejection becomes an arbitrary pitch, and relatively moving these heads and the ink application target in the other direction; Each of the ink nozzles in the plurality of heads is held at a predetermined ink ejection start position by holding a count value corresponding to a desired ink application pitch in the other direction above, and by relative movement between the plurality of heads and the ink application target. After reaching, the relative movement distance between the multiple heads and the ink application target is the distance corresponding to the count value. A head control method and a step of discharging the respective inks from the ink nozzles of repeating a plurality of heads each to reach.
[0011]
In the step of ejecting ink in the head control method of the present invention, the first count value corresponding to the relative movement distance between the head and the ink application target with respect to the ink nozzle that first ejects ink is held, and the first count value in the other direction is held. The second count value corresponding to the ink application pitch is held, and the second count value corresponding to the relative distance between the head that moves from the ink nozzle that ejected the ink until the next ink nozzle ejects the ink and the ink application target Holding the count value of 3 and relatively moving the head and the ink application target, and discharging ink from an ink nozzle that first discharges ink when moved by a distance corresponding to the first count value; The ink that ejects the first ink next to the ink nozzle that ejects the first ink by the relative movement between the head and the ink application target Each time the chisel moves by a distance corresponding to the third count value, the first ink is ejected from each ink nozzle, and the first ink is ejected by relative movement between the head and the ink application target. A step of repeatedly discharging ink each time each ink nozzle moves by a distance corresponding to the second count value.
[0012]
The step of ejecting ink in the head control method of the present invention includes the step of ejecting ink for each of a plurality of heads corresponding to each relative moving distance between the plurality of heads and the ink application target with respect to each ink nozzle that first ejects ink. A count value of 1 is held, a second count value corresponding to the ink application pitch in the other direction is held, and the plurality of heads move from the ink nozzle that has ejected ink until the next ink nozzle ejects ink. A third count value corresponding to a relative distance between the head and the ink application target is held, and the plurality of heads and the ink application target are relatively moved, and each of the plurality of heads corresponds to the first count value. Ejecting ink for the first time from ink nozzles that eject ink first in a plurality of heads when the head moves by a distance that Each time the ink nozzle that ejects ink for the first time after the ink nozzle that ejected ink for the first time by the relative movement between the head and the ink application target moves by a distance corresponding to the third count value, A step of ejecting the first ink from the ink nozzles, and a movement of each ink nozzle ejecting the first ink by a distance corresponding to the second count value due to relative movement of the plurality of heads and the ink application target; And a step of repeatedly ejecting ink every time.
[0013]
The head control method of the present invention preferably includes a step of reciprocating the head and the ink application object in another direction.
[0014]
The head control method of the present invention preferably includes a step of reciprocating the plurality of heads and the ink application target in another direction.
[0015]
In the head control method of the present invention, each ink nozzle holds a count value corresponding to the ink application pitch in the other direction on the ink application target, and each ink nozzle is set in advance by a relative movement between the head and the ink application target. After reaching the ejection start position, each time the relative moving distance between the head and the ink application target reaches the distance corresponding to the count value, the ink is repeatedly ejected from the ink nozzles, and the head and the ink application target are ejected. It is preferable that the order of the plurality of ink nozzles for ejecting ink from the plurality of ink nozzles in the head be switched in the forward path and the return path in the reciprocating movement.
[0016]
In the head control method of the present invention, the step of ejecting ink includes a plurality of heads corresponding to respective relative moving distances between the plurality of heads and the ink application target with respect to each ink nozzle that first ejects ink for each of the plurality of heads. Holds the first count value, holds the second count value corresponding to the ink application pitch in the other direction, and moves from the ink nozzle that has ejected ink in a plurality of heads until the next ink nozzle ejects ink. The third count value corresponding to the relative distance between the head to be applied and the ink application target is held, and when the plurality of heads and the ink application target are moved in the forward direction or the return direction, the plurality of heads respectively When each of the plurality of heads has moved by a distance corresponding to the first count value, the first nozzle ejects ink from the plurality of heads to the first nozzle. Each time the ink nozzle that discharges ink next to the ink nozzle that discharges ink by reciprocating movement between the plurality of heads and the ink application target moves by a distance corresponding to the third count value. In the step of ejecting ink for the first time and inverting the order of ejecting ink from the plurality of ink nozzles in the plurality of heads in the forward path and the return path, and in the reciprocating movement between the plurality of heads and the ink application target, Each time the ink nozzle that has ejected the ink has moved by a distance corresponding to the second count value, and a plurality of ink nozzles that eject ink from the plurality of ink nozzles in the forward path and the return path. And a step of switching the order in reverse.
[0017]
In the head control method of the present invention, for each of a plurality of ink application positions on an ink application target that ejects ink from a plurality of ink nozzles, a plurality of parameters relating to ink ejection conditions for each of the ink application positions are held, and these parameters are stored. It is preferable to control the ink ejection operation of each ink nozzle according to the following.
[0018]
In the head control method according to the aspect of the invention, it is preferable that the ink ejection conditions relate to at least one of a shift in ink ejection timing, a correction of a variation in an appropriate amount of ink, or a plurality of times of ink ejection.
[0019]
In the head control method of the present invention, it is preferable that the operation of discharging ink from the plurality of ink nozzles arbitrarily changes the voltage waveform applied to the piezoelectric element provided in the ink flow path.
[0020]
The present invention relates to a method of manufacturing a display device for ejecting ink from each ink nozzle of a head in which a plurality of ink nozzles are arranged in a line and applying the ink to an ink application target for the display device. Tilting the head so that the ink application pitch in one direction on the ink application target by the above becomes an arbitrary pitch, and relatively moving the head and the ink application target in the other direction in this inclined state; After a count value corresponding to a desired ink application pitch in the other direction above is held, and each ink nozzle reaches a preset ink discharge start position by relative movement between the head and the ink application target, the head Each time the relative movement distance between the ink nozzle and the ink application target reaches the distance corresponding to the count value, Re is a method of manufacturing a display device having a step of discharging the respective inks.
[0021]
The present invention is directed to manufacturing a display device in which a plurality of heads having a plurality of ink nozzles arranged in a line are provided at predetermined intervals, and ink is ejected from each ink nozzle of these heads and applied to an ink application target for the display device. In the method, a plurality of heads are tilted so that the ink application pitch in one direction on the ink application target by each ink ejection from each ink nozzle becomes an arbitrary pitch, and the plurality of heads and the ink application target Relatively moving in the other direction, holding a count value corresponding to the ink application pitch in the other direction on the ink application target, the relative movement between the plurality of heads and the ink application target in a plurality of heads After each ink nozzle reaches a preset ink discharge start position, the relative movement of the plurality of heads and the ink application target is performed. Distance is a method of manufacturing a display device having a step of discharging the respective inks from the ink nozzles of repeating a plurality of heads each to reach a distance corresponding to the count value.
[0022]
In the method for manufacturing a display device according to the present invention, it is preferable that the method is a method for manufacturing a display device to which any one of the above head control methods is applied.
[0023]
The present invention relates to a display device manufacturing apparatus that discharges ink from each ink nozzle of a head in which a plurality of ink nozzles are arranged in a line and applies the ink to an ink application target for the display device. Moving means for relatively moving the head and the ink application target in a state where the head is tilted so that the ink application pitch in one direction on the ink application target by an arbitrary pitch, and at least the other direction on the ink application target And a counter for holding a count value corresponding to a desired ink application pitch, and after each ink nozzle reaches a preset ink discharge start position by relative movement between the head and the ink application target, Each ink nozzle is repeated every time the relative movement distance with the application target reaches the distance corresponding to the count value. Et respectively apparatus for manufacturing a display device provided with the ink ejection control means for ejecting the ink.
[0024]
The present invention is directed to manufacturing a display device in which a plurality of heads having a plurality of ink nozzles arranged in a line are provided at predetermined intervals, and ink is ejected from each ink nozzle of these heads and applied to an ink application target for the display device. In the apparatus, a plurality of heads and the plurality of heads are tilted so that the ink application pitch in one direction on the ink application target by each ink ejection from each ink nozzle in the plurality of heads becomes an arbitrary pitch. Moving means for relatively moving the object, a counter for holding a count value corresponding to a desired ink application pitch in at least another direction on the ink application object, and relative movement between the plurality of heads and the ink application object After each ink nozzle reaches the preset ink discharge start position for each of a plurality of heads, Manufacture of a display device comprising: an ink ejection control means for ejecting ink from each ink nozzle for each of a plurality of heads each time the relative movement distance between the ink and the ink application target reaches a distance corresponding to the count value Device.
[0025]
In the apparatus for manufacturing a display device according to the present invention, it is preferable that the moving unit reciprocates one head or a plurality of heads and the ink application target in the other direction.
[0026]
In the display device manufacturing apparatus according to the aspect of the invention, the counter includes a start counter that holds a first count value corresponding to a relative movement distance between the head and the ink application target with respect to the ink nozzle that first discharges ink; A dot counter that holds a second count value corresponding to the ink application pitch in the other direction on the application object, a head that moves to eject ink from the ink nozzle that ejected ink to the next ink nozzle, and an ink application object And a nozzle counter for holding a third count value corresponding to a relative distance from the nozzle counter.
[0027]
In the display device manufacturing apparatus according to the aspect of the invention, the ink ejection control unit may be configured to perform the operation when the head and the ink application target relatively move in the other direction by a distance corresponding to the first count value held in the start counter. The function of ejecting ink for the first time from the ink nozzle that ejects ink first and the ink nozzle that ejected ink for the first time due to the relative movement between the head and the ink application target cause the ink to be ejected the first time. Each time the ink nozzle to be ejected moves by a distance corresponding to the third count value held in the nozzle counter, the function of ejecting ink is performed. Each time the ink nozzle that ejected ink moves by a distance corresponding to the second count value held in the dot counter, Preferably it has a function of discharging operation of ink.
[0028]
In the display device manufacturing apparatus of the present invention, when the head and the ink application target are reciprocated by the moving unit, the ink ejection control unit includes a plurality of heads in the forward path and the return path in the reciprocal movement between the head and the ink application target. It is preferable to reverse the order of the plurality of ink nozzles that eject ink from the ink nozzles.
[0029]
In the manufacturing apparatus of the display device of the present invention, when the plurality of heads and the ink application target are reciprocated by the moving unit, the counter includes the plurality of heads and the ink for each ink nozzle that first discharges ink for each of the plurality of heads. A start counter that holds a plurality of first count values corresponding to respective moving distances relative to an application target, and a dot that holds a second count value corresponding to an ink application pitch in another direction for each of a plurality of heads A counter and a nozzle that holds a third count value corresponding to a relative distance between the head to be applied and the head that moves from the ink nozzle that has ejected the ink in the plurality of heads until the ink is ejected by the next ink nozzle It is preferable to have a counter.
[0030]
In the display device manufacturing apparatus of the present invention, when the moving means reciprocates the plurality of heads and the ink application target, the ink discharge control means moves the plurality of heads and the ink application target in the forward direction or the backward direction. In this case, when the plurality of heads are moved by respective distances corresponding to the respective first count values, first ink is ejected from ink nozzles that first eject ink in the plurality of heads. Every time an ink nozzle that firstly ejects ink next to an ink nozzle that first ejects ink by reciprocating movement with the ink application target moves by a distance corresponding to a third count value, and In the forward path and the return path, the order in which ink is ejected from the plurality of ink nozzles of the plurality of heads is switched in reverse, and Each time the ink nozzle that first ejected ink by the reciprocating movement with the ink application object moves by a distance corresponding to the second count value, the ink nozzle repeatedly ejects the ink nozzle. Switching the order in which ink is ejected from the ink nozzles in the reverse order.
[0031]
In the apparatus for manufacturing a display device according to the present invention, for each of a plurality of ink application positions to which ink is applied, an ink discharge condition storage means for storing a plurality of parameters relating to ink discharge conditions for each of the ink application positions, and an ink discharge condition storage means Nozzle control means for controlling the ink discharge operation of each ink nozzle in accordance with the parameters stored in the printer.
[0032]
In the display device manufacturing apparatus of the present invention, it is preferable that the display device includes a light emitting element configured to emit light at a timing at which ink is ejected from each ink nozzle, and the light emission timing is configured to be changeable.
[0033]
In the manufacturing apparatus for a display device of the present invention, the ink ejection condition storage means stores at least one of a shift in ink ejection timing, a correction of a variation in an appropriate amount of ink, and a plurality of ink ejections. Preferably, one or a combination is stored.
[0034]
In the display device manufacturing apparatus of the present invention, it is preferable that the nozzle control means discharges ink from the ink nozzle by arbitrarily changing a voltage waveform applied to the piezoelectric element provided in the ink flow path.
[0035]
It is preferable that the display device manufacturing apparatus of the present invention further includes a control unit that controls a method of discharging the electric charge charged to the piezoelectric element.
[0036]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, a first embodiment of the present invention will be described with reference to the drawings.
[0037]
In the head control method of the present invention, as shown in FIG. ₀ ~ N _n Are arranged in a line at nozzle intervals of, for example, 1200 μm. For example, R (red), G (green) or B is applied to an ink application target such as a color filter used for a display device at an ink dot interval of 150 μm. Each of the (blue) inks is applied at grid points as shown in FIG. Note that the ink nozzle n ₀ ~ N _n Is n ₀ Is the 0th ink nozzle, n ₁ Is the first ink nozzle,..., N _n Is called the n-th ink nozzle.
[0038]
The head 1 is provided with each ink nozzle n ₀ ~ N _n Each ink flow path is provided with a piezoelectric element (PZT), and a voltage is applied to these piezoelectric elements so that each ink nozzle n ₀ ~ N _n , Respectively, to perform an ink discharging operation. The number of ink nozzles of the head 1 is, for example, 256 (n ₂₅₆ ).
[0039]
To apply ink at an ink dot interval of 150 μm, the head 1 is tilted as shown in FIG. ₀ ~ N _n (Pixel pitch) is set to 150 μm. The head tilting means may tilt using an XYθ stage that supports the object to be coated, or may tilt the ink head itself.
[0040]
If the head 1 is moved in the X direction as shown in FIG. 3 while the head 1 is inclined, the ink dot interval in the Y direction becomes 150 μm.
[0041]
On the other hand, in order to also set the ink dot interval in the X direction to 150 μm, first, the head 1 starts moving in the X direction from the standby position, and then the ink dot position d at which ink is first ejected. ₁ No. 0 ink nozzle n ₀ Reaches the ink nozzle n ₀ The operation of ejecting ink from is performed. At this time, the head 1 moves from the standby position to the ink dot position d. ₁ Since the distance A is constant and the relative speed between the head 1 and the ink application target is also known in advance, it is possible to set the first count value corresponding to the distance A in advance.
[0042]
Each ink nozzle n ₀ ~ N _n Is constant at 150 μm, it is possible to preset the second count value corresponding to the ink dot interval of 150 μm.
[0043]
No. 1 ink nozzle n ₁ Is the 0th ink nozzle n ₀ The head 1 moves in the X direction by a certain distance B after the start of ink ejection, and then performs an ink ejection operation. Therefore, a third count value corresponding to the fixed distance B is set in advance.
[0044]
The fixed distance B is, as shown in FIG. ₀ ~ N _n Is 1200 μm, for example, and the ink dot interval in the Y direction is set to 150 μm by inclining the head 1.
Distance B = 1200 μm × cos (sin ^-1 (150 μm / 1200 μm)
Required by
[0045]
Each ink nozzle n ₂ ~ N _n Are the ink nozzles that performed the ink ejection operation immediately before their own ink nozzles, for example, the third ink nozzle n ₃ Then, the second ink nozzle n ₂ The head 1 moves in the X direction by a certain distance B after the start of ink ejection, and then performs an ink ejection operation. By controlling the ink ejection timing in the X direction in this way, the ink dot interval in the X direction is also 150 μm.
[0046]
Next, an apparatus for manufacturing a display device using the above-described head control method will be described.
[0047]
FIG. 5 is a configuration diagram of a display device manufacturing apparatus. A start / stop (START / STOP) signal, a blanking signal, a clear signal, and a signal from the X-axis encoder are input from the outside to the device control unit 10, and among these, the start / stop signal and the blanking signal are input. The ON signal is input to the ink ejection control circuit 12 via the photocoupler 11, and the signal from the X-axis encoder is input to both the dot counter 14 and the nozzle counter 15 via the receiver 13.
[0048]
The start / stop signal is a signal for starting and stopping the ink application operation in the manufacturing apparatus.
[0049]
The idling signal is given for each ink nozzle n ₀ ~ N _n Is a signal for forcibly ejecting ink to eliminate clogging or the like.
[0050]
The clear signal is a signal indicating information when the manufacturing apparatus returns to the start position.
[0051]
The X-axis encoder outputs a pulse signal every time the head 1 moves, for example, and the pulse count number × 1 μm is the moving distance of the head 1. The signal from the X-axis encoder is a pulse signal corresponding to the moving distance when the head 1 is moved.
[0052]
The start / stop signal and the idling signal insulate the device control unit 10 and the ink discharge control circuit 12 through the photocoupler 11.
[0053]
The input / output terminal of the start counter 16 and the output terminals of the dot counter 14 and the nozzle counter 15 are connected to the ink ejection control circuit 12.
[0054]
As shown in FIG. 3, the start counter 16 moves the head 1 from the standby position to the ink dot position d. ₁ A first count value corresponding to the distance A up to is set in advance. The start counter 16 starts counting in response to a start signal input through the ink discharge control circuit 12, and returns a signal notifying that the distance A has been reached to the ink discharge control circuit 12 when the first count value is reached. Having. As the start counter 16, for example, a 16-bit counter is used.
[0055]
In the dot counter 14, a second count value corresponding to an arbitrary ink application pitch, that is, an ink dot interval of 150 μm in the X direction is set in advance. The dot counter 14 performs a counting operation based on a signal from the X-axis encoder input via the receiver 13, and notifies that the ink dot interval has been reached when the count value reaches the second count value. It has a function of sending a signal to the ink ejection control circuit 12, clearing the count value each time the count value reaches the second count value, and repeating the count operation. As the dot counter 14, for example, a 16-bit counter is used.
[0056]
The nozzle counter 15 has a certain ink nozzle n ₀ ~ N _n-1 Starts the ink ejection and then the next ink nozzle n ₁ ~ N _n A third count value corresponding to a fixed distance B in which the head 1 moves in the X direction when the ink is ejected is set in advance. This nozzle counter 15 has a certain ink nozzle n ₀ ~ N _n-1 Count operation from the X-axis encoder input via the receiver 13 from the start of the ink discharge of the above, and when this count value reaches the third count value, a signal notifying that it has moved by a certain distance B is output. It has a function of sending it to the ink ejection control circuit 12, clearing the count value each time the count value reaches the second count value, and repeating the count operation. As the dot counter 14, for example, a 16-bit counter is used.
[0057]
A memory device (ink ejection condition storage means) 17 is connected to the ink ejection control circuit 12. As shown in FIG. 6, the memory device 17 previously stores data of a voltage waveform (voltage pattern) applied to the piezoelectric element of the head 1 and a plurality of parameters relating to ink ejection conditions for each ink dot as position correction data. Have been. The voltage waveform data and the position correction data are stored for each ink dot position in order to make the ink application independent at each ink dot position. The voltage waveform data and the position correction data are stored in correspondence with each address data indicating each ink dot position. As the memory device 17, for example, a 2 Mb × 8 EPROM is used.
[0058]
The voltage waveform data is obtained by changing the voltage waveform applied to the piezoelectric element of the head 1 to each of the ink nozzles n. ₀ ~ N _n Since the amount of the ink ejected from the ink can be controlled, an optimal voltage waveform for ink application is stored in advance. Further, data of the pulse width of the voltage waveform applied to the piezoelectric element of the head 1 is also stored.
[0059]
The position correction data includes, for example, an ink nozzle n that ejects ink at each ink dot position as an ink ejection condition. ₀ ~ N _n , The deviation of the ink ejection timing, the correction of the variation in the amount of the ink, or the ejection of the ink a plurality of times. These data are stored as one or a combination of these data.
[0060]
Of these, the ink nozzle n ₀ ~ N _n Is designated by the ink nozzle n which ejects ink at each ink dot position. ₀ ~ N _n Can be designated, for example, the ink nozzle n for each ink dot position ₁ , N ₂ , N ₃ , N ₄ , N ₁ , ... can be specified.
[0061]
The deviation of the ink ejection timing indicates the amount of deviation because the ink may not be ejected at a predetermined ink dot position but may be ejected at a position shifted from the predetermined ink dot position.
[0062]
The correction of the variation in the appropriate amount of the ink is correction data for making the amount of the ink ejected at each ink dot position constant.
[0063]
A plurality of ink ejections is performed by using one ink nozzle (for example, the ink nozzle n) at one ink dot position. ₁ ) Indicates that ink is continuously ejected a plurality of times.
[0064]
A memory device (SROM) 18, a crystal oscillator 19 having an oscillation frequency of 50 MHz, an AMP circuit 20, and timing circuits 21 and 22 are connected to the ink ejection control circuit 12.
[0065]
The AMP circuit 20 has 256 ink nozzles n in the head 1. ₀ ~ N _n To apply a voltage to each of the piezoelectric elements. ₀ ~ N _n 256 circuits are provided for each. These AMP circuits 20 correspond to the respective ink nozzles n output from the ink discharge control circuit 12. ₀ ~ N _n Each drive signal is boosted to a predetermined voltage and applied to each piezoelectric element. For example, as shown in FIG. ₁ And diode D and resistor R ₂ Are connected in parallel with each other, and each resistor R ₁ And R ₂ Is connected to the piezoelectric element. Note that the voltage Vmax is supplied to the AMP circuit 20.
[0066]
One timing circuit 21 controls each ink nozzle n in the head 1. ₀ ~ N _n Provided for each ink nozzle n output from the ink discharge control circuit 12. ₀ ~ N _n Drive signal for each ink nozzle n ₀ ~ N _n Each ink nozzle n in synchronization with the ink ejection operation from ₀ ~ N _n Has a function of emitting an LED for each strobe corresponding to. Thus, each ink nozzle n ₀ ~ N _n Are caused to emit light for each strobe LED corresponding to each ink nozzle n ₀ ~ N _n This is for observing the appropriate behavior of the ink ejected from the liquid.
[0067]
The other timing circuit 22 has a function of inputting a signal from the ink discharge control circuit 12 and outputting an idle signal.
[0068]
The ink ejection control circuit (ink ejection control means) 12 is an ink nozzle that ejects ink first when the head 1 moves in the X direction by a distance A corresponding to the first count value held in the start counter 16. n ₀ From the first to the first ink ejection operation.
[0069]
The ink discharge control circuit 12 is provided with an ink nozzle n that discharges ink by moving the head 1. ₀ ~ N _n-1 Nozzle n that ejects ink next to ₁ ~ N _n Is moved by a distance B corresponding to the third count value held in the nozzle counter 15, each ink nozzle n ₁ ~ N _n Has the function of causing the first ink ejection operation.
[0070]
The ink discharge control circuit 12 controls each ink nozzle n that has discharged the first ink by moving the head 1. ₀ ~ N _n Each time the ink nozzle n is moved by a distance of 150 μm corresponding to the second count value held in the dot counter 14, ₀ ~ N _n Have a function of ejecting the ink from each of them.
[0071]
Further, the ink discharge control circuit 12 reads the parameters stored in the memory device 17 from the address for each ink dot position, and according to the parameters, each ink nozzle n ₀ ~ N _n Has a function of controlling the ink ejection operation of the printer.
[0072]
For example, the ink discharge control circuit 12 has a function of controlling a voltage waveform applied to the piezoelectric element of the head 1 according to the voltage waveform data, and an ink nozzle n designated for each ink dot position. ₀ ~ N _n Ink nozzle n corresponding to the number of ₀ ~ N _n Has the function of controlling the ink ejection operation from the printer.
[0073]
The ink ejection control circuit 12 has a function of controlling an ink ejection operation at a position shifted from a predetermined ink dot position according to a shift in ink ejection timing for each ink dot position.
[0074]
The ink ejection control circuit 12 has a function of making the amount of ink ejected at each ink dot position constant in accordance with the correction of the variation in the appropriate amount of ink.
[0075]
The ink ejection control circuit 12 performs one ink nozzle (for example, ink nozzle n) for one ink dot position in accordance with a plurality of ink ejections. ₁ ) Has a function of controlling the ink ejection operation continuously plural times.
[0076]
FIG. 8 is a specific block configuration diagram of the ink ejection control circuit 12. Note that the ink ejection control circuit 12 has one ink nozzle (for example, n ₀ ), And the ink discharge control circuit 12 actually controls all the ink nozzles n. ₀ ~ N _n Are provided in a one-to-one relationship. In this case, 256 ink nozzles n ₀ ~ N _n Are provided, 256 ink ejection control circuits 12 are provided.
[0077]
The start count processing unit 30 constantly monitors the output signal of the start counter 16 and, upon input of a signal indicating that the count value of the start counter 16 has reached the first count value and the head 1 has moved by the distance A, At this time, it has a function of transmitting a signal for starting the nozzle operation.
[0078]
The nozzle count processing unit 31 constantly monitors the output signal of the nozzle counter 15, and when the count value of the nozzle counter 15 reaches the third count value and a certain nozzle n ₀ ~ N _n-1 Starts the ink ejection and then the next ink nozzle n ₁ ~ N _n When a signal is input to notify that the head 1 has moved by a certain distance B in the X direction when ink is ejected, a function of transmitting a nozzle operation signal is provided at this time.
[0079]
The dot count processing unit 32 constantly monitors the output signal of the dot counter 14 to determine that the count value of the dot counter 14 has reached the second count value and that the head 1 has moved in the X direction by the ink dot interval 150 μm. It has a function of sending out a nozzle operation signal when a signal to notify is input.
[0080]
The 0th nozzle start unit 33 receives the nozzle operation start signal sent from the start count processing unit 30, and at this time, the 0th ink nozzle n ₀ Has a function of transmitting a No. 0 nozzle operation signal for starting the ink discharge operation of the above to the drive pulse control unit 34 and the n-th nozzle start unit 35.
[0081]
The n-th nozzle start unit 35 sequentially receives the nozzle operation signals from the nozzle count processing unit 31 after receiving the 0-th nozzle operation signal from the 0-th nozzle start unit 33. It has a function of sending the n-th nozzle operation signal to the drive pulse control unit 34.
[0082]
The dot counter latch unit 36 outputs a nozzle operation signal to the drive pulse control unit every time a nozzle operation signal is sequentially input from the dot count processing unit 32 that is sent out each time the head 1 moves by an ink dot interval of 150 μm in the X direction. 34.
[0083]
The drive pulse control unit 34 receives the 0th nozzle operation signal from the 0th nozzle start unit 33, the nth nozzle operation signal from the nth nozzle start unit 35, or the nozzle operation signal from the dot counter latch unit 36 each time. And each ink nozzle n ₀ ~ N _n Has a function of generating a drive pulse for driving the piezoelectric element and sending the drive pulse to the dot total number checking unit 37 and the waveform forming unit 38.
[0084]
The dot total number confirmation unit 37 counts, for example, the drive pulses from the drive pulse control unit 34 for each ink dot, confirms the total number of ink dots that perform an ink application operation on an ink application target such as a color filter used for a display device, It has a function of sending a confirmation signal to the termination unit 39 and the memory address setting unit 40.
[0085]
When the end unit 39 confirms that the ink application operation for the ink application target such as the color filter used for the display device has been completed based on the confirmation signal from the dot total number confirmation unit 37, it outputs an ink application operation end signal to the waveform output unit 41. Has the function of sending to
[0086]
The memory address setting unit 40 applies the ink based on the confirmation signal from the dot total number confirmation unit 37, the nozzle operation signal from the nozzle start unit 33, or the nozzle operation signal from the nozzle start unit 35. It has a function of sending the memory address of the ink dot to be used.
[0087]
On the other hand, of the data stored in the memory device 17, the position correction data (memory data "1") is latched by the position correction value input latch section 42, and the voltage pattern data (memory data "2") is latched by the waveform number input latch. The ink nozzle n latched by the unit 43 and included in the position correction data ₀ ~ N _n Is latched by the nozzle number input latch section 44.
[0088]
The position correction value input latch section 42, the waveform number input latch section 43, and the nozzle number input latch section 44 synchronize the position correction data, the voltage pattern data and the ink nozzle n with the oscillation frequency 50 MHz of the crystal oscillator 19. ₀ ~ N _n Latch the specified data of number.
[0089]
The waveform data input unit 45 includes the position correction data, the voltage pattern data, and the ink nozzle n latched by the position correction value input latch unit 42, the waveform number input latch unit 43, and the nozzle number input latch unit 44, respectively. ₀ ~ N _n Has the function of inputting the designated data of the number.
[0090]
When the drive pulse from the drive pulse control unit 34 is input, the waveform forming unit 38 forms a waveform of the drive pulse in accordance with the position correction data input to the waveform data input unit 45, and adds the drive pulse to the waveform-formed drive pulse. Nozzle n ₀ ~ N _n Has a function of adding the designated data of the number and sending it to the waveform output unit 41.
[0091]
The waveform output section 41 receives the drive pulse from the waveform forming section 38 and the ink nozzle n. ₀ ~ N _n When the designated data of the designated number is inputted, the ink nozzle n of the designated number is inputted. ₀ ~ N _n And outputs a drive pulse. The waveform output unit 41 outputs a drive pulse for PWM control to the AMP circuit 20.
[0092]
The idling pulse unit 46 has a function of sending an idling signal to the timing circuit 22 through the waveform output unit 41.
[0093]
The above-described ink ejection control circuit 12 realizes each of the above functions by incorporating a software-based algorithm while configuring it with hardware logic using a programmable device.
[0094]
Next, the operation of the apparatus configured as described above will be described with reference to the head control flowchart shown in FIG.
[0095]
When the idling signal is input to the apparatus control unit 10, the idling signal is input to the ink ejection control circuit 12 via the photocoupler 11. When the ink ejection control circuit 12 determines in step # 1 that a blank shot signal has been input, it proceeds to the next step # 2 and performs blank shot processing. In this idling process, the idling signal is sent to the timing circuit 22 through the waveform output unit 41 by the idling pulse unit 46. Thereby, each ink nozzle n of the head 1 ₀ ~ N _n Is performed, ink is forcibly ejected, and these ink nozzles n ₀ ~ N _n Clogging etc. is eliminated.
[0096]
Next, the ink discharge control circuit 12 waits for input of a start / stop signal from the device control unit 10 in step # 3. When a start signal is input to the apparatus control unit 10 in this state, the ink applying operation is started in the manufacturing apparatus, and the head 1 starts moving in the X direction from the standby position as shown in FIG.
[0097]
At this time, when the start signal is input to the device control unit 10, the start signal is input to the ink discharge control circuit 12 via the photocoupler 11.
[0098]
The ink discharge control circuit 12 proceeds from step # 3 to step # 4, and starts the count operation of the start counter 16. As shown in FIG. 3, the start counter 16 moves the head 1 from the standby position to the ink dot position d. ₁ A first count value corresponding to the distance A up to is set in advance, and counting is started by a start signal input through the ink ejection control circuit 12.
[0099]
At the same time, the dot counter 14 sets a second count value corresponding to the ink dot interval 150 μm in the X direction in advance, and performs a counting operation based on a signal from the X-axis encoder input via the receiver 13. When the count value reaches the second count value, a signal indicating that the ink dot interval has been reached is sent to the ink ejection control circuit 12, and the count value is incremented every time the count value reaches the second count value. Clear and repeat the count operation.
[0100]
Then, the movement of the head 1 causes the 0th ink head n ₀ Is the ink dot d at which the first ink ejection is performed as shown in FIG. ₁ At the same time, the count value of the start counter 16 reaches the first count value. Therefore, the start counter 16 returns to the ink ejection control circuit 12 a signal indicating that the head 1 has reached the distance A.
[0101]
When the ink discharge control circuit 12 receives a signal from the start counter 16 indicating that the head 1 has reached the distance A, it determines in step # 5 that the start counter 16 has completed counting, and proceeds to step # 6. Move to No. 0 ink nozzle n ₀ Operation control is started, and in the next step # 7, the 0th ink nozzle n ₀ Nozzle control is performed.
[0102]
That is, inside the ink discharge control circuit 12, the start count processing unit 30 constantly monitors the output signal of the start counter 16, and when the count value of the start counter 16 reaches the first count value, the head 1 When a signal indicating that the movement has been made by the distance A is input, a signal for starting the nozzle operation is transmitted at this time.
[0103]
The 0th nozzle start unit 33 receives the nozzle operation start signal sent from the start count processing unit 30, and at this time, the 0th ink nozzle n ₀ Is transmitted to the drive pulse control unit 34 and the n-th nozzle start unit 35 to start the ink discharge operation of No. 0.
[0104]
The drive pulse control unit 34 receives the nozzle operation signal from the 0th nozzle operation signal from the 0th nozzle start unit 33, ₀ A driving pulse for driving the piezoelectric element is generated, and the driving pulse is sent to the dot total number checking unit 37 and the waveform forming unit 38.
[0105]
Among them, the dot total number confirming unit 37 counts, for example, the driving pulses from the driving pulse control unit 34 for each ink dot, and confirms the total number of ink dots that perform an ink application operation on an ink application target such as a color filter used for display equipment. Then, the confirmation signal is sent to the termination unit 39 and the memory address setting unit 40.
[0106]
When the end unit 39 confirms that all the ink application operations for the ink application target such as the color filter used for the display device have been completed based on the confirmation signal from the dot total number confirmation unit 37, the end unit 39 outputs an ink application operation end signal. It is sent to the waveform output unit 41.
[0107]
Further, the memory address setting unit 40 sends out the memory address of the ink dot to be applied with ink based on the confirmation signal from the dot total number confirmation unit 37 and the # 0 nozzle operation signal from the # 0 nozzle start unit 33.
[0108]
On the other hand, the ink discharge control circuit 12 performs nozzle control according to the nozzle control flowchart shown in FIG. That is, in step # 20, the position correction value input latch section 42, the waveform number input latch section 43, and the nozzle number input latch section 44 ₀ The ink dot d for which ink is ejected first ₁ Is latched from the memory device 17.
[0109]
That is, the position correction value input latch unit 42 latches the position correction data among the data stored in the memory device 17 in step # 21. The waveform number input latch unit 43 latches the voltage pattern data stored in the memory device 17 in step # 21. In step # 21, the nozzle number input latch unit 44 determines the ink nozzle n in the position correction data stored in the memory device 17. ₀ ~ N _n Latch the specified data of number.
[0110]
Next, in step # 22, the waveform data input unit 45 outputs the position correction data, the voltage pattern data, and the ink which are respectively latched by the position correction value input latch unit 42, the waveform number input latch unit 43, and the nozzle number input latch unit 44. Nozzle n ₀ ~ N _n Input the designated data of number.
[0111]
Next, the waveform forming unit 38 receives the drive pulse from the drive pulse control unit 34, and in this case, the 0th ink nozzle n ₀ A drive pulse for starting the ink discharge operation of the above is formed into a waveform in accordance with the position correction data input to the waveform data input section 45, and the drive pulse having the waveform is formed by the ink nozzle n ₀ ~ N _n , And sends the data to the waveform output unit 41.
[0112]
Next, the waveform output unit 41 outputs the drive pulse from the waveform forming unit 38 and the ink nozzle n. ₀ ~ N _n When the designated data of the designated number is inputted, the ink nozzle n of the designated number is inputted. ₀ ~ N _n Is confirmed, and a drive pulse is applied to the piezoelectric element PZT.
[0113]
As a result, the 0-th ink nozzle n ₀ Performs an ink ejection operation, and ink dots d shown in FIG. ₁ Apply ink to locations.
[0114]
The position correction value input latch section 42, the waveform number input latch section 43, and the nozzle number input latch section 44 connect to the memory device 17 in step # 23 in synchronization with the oscillation frequency of 50 MHz oscillated from the crystal oscillator 19. Latch and update stored data.
[0115]
Next, in step # 24, the ink ejection control circuit 12 determines whether or not the data to be latched from the memory device 17 is completed. ₁ Since the ink has only been applied to the position, not only the end of the data, but also the process proceeds from step # 25 to step # 27, the address of the next ink dot position to be applied is set, and the next ink dot position is set. It is in a standby state until ink is applied at the address.
[0116]
As described above, the ink dot d shown in FIG. ₁ When the ink application at the position is completed, the head 1 moves further in the X direction, and the 0th ink nozzle n ₀ Is the ink dot position d ₂ To reach.
[0117]
At this time, the dot counter 14 sets a second count value corresponding to the ink dot interval 150 μm in the X direction in advance, and performs a counting operation based on a signal from the X-axis encoder input via the receiver 13. When this count value reaches the second count value, the head 1 moves by an ink dot interval of 150 μm, and as shown in FIG. ₀ Is the ink dot position d ₁ From position d ₂ Is transmitted to the ink ejection control circuit 12.
[0118]
Thereafter, the dot counter 14 clears the count value and repeats the count operation each time the count value reaches the second count value, that is, every time the head 1 moves by the ink dot interval of 150 μm.
[0119]
Therefore, every time the dot value reaches the second count value, the dot counter 14 sends to the ink ejection control circuit 12 a signal indicating that the ink dot position has been reached.
[0120]
However, the drive pulse control unit 34 controls each ink nozzle n each time a nozzle operation signal is input from the dot counter latch unit 36. ₀ A driving pulse for driving the piezoelectric element is generated, and the driving pulse is sent to the dot total number checking unit 37 and the waveform forming unit 38.
[0121]
Thereafter, similarly to the above, the memory address setting unit 40 sets the memory address of the ink dot to be applied based on the confirmation signal from the dot total number confirmation unit 37 and the No. 0 nozzle operation signal from the No. 0 nozzle start unit 33. Send out.
[0122]
On the other hand, the position correction value input latch unit 42, the waveform number input latch unit 43, and the nozzle number input latch unit 44 are respectively the 0th ink nozzle n shown in FIG. ₀ The ink dot d that performs each ink ejection from the second time on ₂ , D ₃ ,... Are latched from the memory device 17, and these data are input to the waveform data input unit 45.
[0123]
Next, the waveform forming unit 38 outputs the No. 0 ink nozzle n from the drive pulse control unit 34. ₀ A drive pulse for starting the ink discharge operation of the above is formed into a waveform in accordance with the position correction data input to the waveform data input section 45, and the drive pulse having the waveform is formed by the ink nozzle n ₀ , And sends the data to the waveform output unit 41. Next, the waveform output unit 41 outputs the ink nozzle n of the designated number. ₀ Is confirmed, and a drive pulse is applied to the piezoelectric element PZT.
[0124]
As a result, the 0-th ink nozzle n ₀ Performs an ink ejection operation each time the head 1 moves by an ink dot interval of 150 μm, and the ink dot position d shown in FIG. ₂ , D ₃ Apply ink to.
[0125]
Next, the first ink nozzle n ₁ Explaining the ejection operation of
The nozzle counter 15 determines in step # 8 that the 0th ink nozzle n ₀ The counting operation of the signal from the X-axis encoder input via the receiver 13 is started from the start of the ink ejection of the above.
[0126]
This nozzle counter 15 stores the 0th ink nozzle n ₀ Starts the ink ejection and then the next ink nozzle n ₁ Since the third count value corresponding to the fixed distance B at which the head 1 moves in the X direction when performing ink ejection as shown in FIG. ₁ Is the ink dot position d shown in FIG. ₁₁ When the count value reaches the third count value, a signal is sent to the ink ejection control circuit 12 to notify that it has moved by a certain distance B when the count value reaches the third count value.
[0127]
In the ink discharge control circuit 12, the nozzle count processing unit 31 constantly monitors the output signal of the nozzle counter 15, and when the count value of the nozzle counter 15 reaches the third count value, for example, the ink nozzle n ₀ Starts the ink ejection and then the next ink nozzle n ₁ When a signal is input to notify that the head 1 has moved a fixed distance B in the X direction when ink is ejected, a nozzle operation signal is transmitted at this time.
[0128]
The n-th nozzle start unit 35 determines whether or not the 0th nozzle operation signal has been received from the 0th nozzle start unit 33 in step # 9, that is, whether or not the 0th ink nozzle n0 has already performed the ink discharge operation. In this case, since the 0th nozzle operation signal has already been input from the 0th nozzle start unit 33, when the nozzle operation signal from the nozzle count processing unit 31 is input, the 1st nozzle operation signal is changed to the drive pulse control unit 34. To send to.
[0129]
However, upon receiving the first nozzle operation signal from the n-th nozzle start unit 35, the drive pulse control unit 34 ₁ A driving pulse for driving the piezoelectric element is generated, and the driving pulse is sent to the dot total number checking unit 37 and the waveform forming unit 38.
[0130]
Thereafter, in steps # 10 and # 11, the ink discharge control circuit 12 sets the memory address setting section 40 to the confirmation signal from the dot total number confirmation section 37 and the first from the n-th nozzle start section 33 in the same manner as described above. The memory address of the ink dot to be applied is transmitted based on the nozzle operation signal.
[0131]
On the other hand, the position correction value input latch section 42, the waveform number input latch section 43, and the nozzle number input latch section 44 are respectively the first ink nozzle n shown in FIG. ₁ The ink dot d that performs the first ink ejection ₁₁ Is latched from the memory device 17, and these data are input to the waveform data input unit 45.
[0132]
Next, the waveform forming unit 38 outputs the first ink nozzle n from the drive pulse control unit 34. ₁ A drive pulse for starting the ink discharge operation of the above is formed into a waveform in accordance with the position correction data input to the waveform data input section 45, and the drive pulse having the waveform is formed by the ink nozzle n ₁ , And sends the data to the waveform output unit 41. Next, the waveform output unit 41 outputs the ink nozzle n of the designated number. ₁ Is confirmed, and a drive pulse is applied to the piezoelectric element PZT.
[0133]
As a result, the first ink nozzle n ₁ Is the ink dot position d ₁₁ At the ink dot position d shown in FIG. ₁₁ Apply ink to.
[0134]
Thereafter, the first ink nozzle n ₁ Indicates that the dot counter 14 clears the count value and repeats the count operation each time the count value reaches the second count value, that is, every time the head 1 moves by the ink dot interval of 150 μm.
[0135]
Therefore, every time the dot value reaches the second count value, the dot counter 14 sends to the ink ejection control circuit 12 a signal indicating that the ink dot position has been reached.
[0136]
However, each time the drive pulse control unit 34 inputs the nozzle operation signal from the dot counter latch unit 36, the drive pulse control unit 34 ₁ A driving pulse for driving the piezoelectric element is generated, and the driving pulse is sent to the dot total number checking unit 37 and the waveform forming unit 38.
[0137]
As a result, the first ink nozzle n ₁ Is the ink dot position d as shown in FIG. ₁₂ , D ₁₃ Apply ink every time.
[0138]
2nd to nth ink nozzles n ₂ ~ N _n No. 1 ink nozzle n ₁ Similarly, in step # 9, the nozzle counter 15 determines that the first through n-1th ink nozzles n ₁ ~ N _n-1 The counting operation of the signal from the X-axis encoder input via the receiver 13 is started from the start of the ink ejection of the above.
[0139]
The nozzle counter 15 includes the first to n-1st ink nozzles n. ₁ ~ N _n-1 Starts the ink ejection and then the next ink nozzle n ₂ ~ N _n Since the third count value corresponding to the fixed distance B at which the head 1 moves in the X direction when performing ink ejection as shown in FIG. ₂ ~ N _n Are the respective ink dot positions d shown in FIG. ₂₁ ~ D ₄₁ When the count value reaches the third count value, a signal is sent to the ink ejection control circuit 12 to notify that it has moved by a certain distance B when the count value reaches the third count value.
[0140]
As a result, the second to n-th ink nozzles n ₂ ~ N _n Is the ink dot position d ₂₁ ~ D ₄₁ ,..., The ink is ejected, and the ink is applied.
[0141]
Thereafter, the second to n-th ink nozzles n ₂ ~ N _n Indicates that the dot counter 14 clears the count value and repeats the count operation each time the count value reaches the second count value, that is, every time the head 1 moves by the ink dot interval of 150 μm.
[0142]
Therefore, as described above, the second to n-th ink nozzles n ₂ ~ N _n Performs an ink discharging operation each time the head 1 moves by an ink dot interval of 150 μm to apply ink.
[0143]
As a result, ink is applied to the ink application target such as a color filter used in a display device in the form of lattice points at an ink dot interval of, for example, 150 μm in both the X and Y directions.
[0144]
As described above, in the first embodiment, each ink nozzle n ₀ ~ N _n The head 1 is tilted so that the ink dot interval in the Y direction due to each ink ejection from the head becomes an arbitrary pitch (150 μm), and the head 1 is moved in this tilted state to obtain a desired ink dot interval in the X direction (150 μm). Is set in the dot counter 14, and the movement of the head 1 causes each ink nozzle n ₀ ~ N _n Are preset ink dot positions d, respectively. ₁ , D ₁₁ , D ₂₁ ,..., Each time the moving distance of the head 1 reaches the distance corresponding to the count value, ₀ ~ N _n , The ink can be applied in the form of grid points at an ink dot interval of, for example, 150 μm in both the X and Y directions.
[0145]
In this case, the ink dot interval is set to, for example, 150 μm in both the X and Y directions. However, each of the ink nozzles n when the head 1 is tilted or the head 1 is moved in the X direction is changed. ₀ ~ N _n By controlling the ink ejection timing in the above, the ink can be applied at an arbitrary ink dot interval in the X and Y directions.
[0146]
Therefore, a plurality of ink nozzles n ₀ ~ N _n Is scanned once by using the existing head 1 in which the ink nozzles n are arranged in a line in an arbitrary specification. ₀ ~ N _n This makes it possible to manufacture the display device by applying ink to an ink application target such as a color filter used for the display device.
[0147]
Also, the 0th ink nozzle n which ejects ink first from the start of the manufacturing apparatus ₀ Holds a first count value corresponding to the moving distance A of the head 1 with respect to the second nozzle, and holds a second count value corresponding to an arbitrary ink dot interval (150 μm). When a third count value corresponding to the moving distance B of the head 1 that moves to eject ink from is held, the head 1 is moved in the X direction, and the head 1 is moved by a distance A corresponding to the first count value. Nozzle n which first ejects ink ₀ Each time the ink nozzle that ejects the ink for the first time and the ink nozzle that ejects the ink after the ink nozzle that has ejected the ink by the movement of the head 1 moves by the distance B corresponding to the third count value, Each of the ink nozzles n that ejected the first ink and ejected the first ink by moving the head 1 ₀ ~ N _n Each time the ink nozzle n moves by a distance B corresponding to the second count value. ₀ ~ N _n From the standby position, the head 1 starts moving in the X direction automatically and accurately at each ink dot position d. ₁ , D ₂ , D ₃ , ..., d ₁₁ , D ₂₁ ,... Can be coated with ink.
[0148]
Also, a plurality of ink nozzles n ₀ ~ N _n A plurality of ink dot positions d each ejecting ink from ₁ , D ₂ , D ₃ , ..., d ₁₁ , D ₂₁ ,... Hold a plurality of parameters relating to the ink ejection conditions for each ink dot position, such as deviation of the ink ejection timing, correction of variation in the appropriate amount of ink, or multiple times of ink ejection. According to each ink nozzle n ₀ ~ N _n Can be controlled.
[0149]
That is, by changing the voltage waveform applied to the piezoelectric element of the head 1 based on the voltage waveform data, each ink nozzle n ₀ ~ N _n The amount of ink ejected from the ink nozzle n ₀ ~ N _n It can be controlled separately and for each drop of ink.
[0150]
Here, each ink nozzle n ₀ ~ N _n When the ejection of the first ink droplet is completed, the second ink droplet is ejected. If this operation is repeated, an arbitrary number of ink droplets can be ejected. The number of drops that can be ejected to a location is limited. Thus, by adjusting the moving speed of the head 1 and the distance of ink ejection, ink can be ejected an arbitrary number of times at one ink dot position. Thereby, the ink nozzle n ₀ ~ N _n The ink droplet amount can be arbitrarily adjusted without changing each nozzle diameter.
[0151]
Ink nozzle n ₀ ~ N _n Ink nozzle n that ejects ink at each ink dot position ₀ ~ N _n Can be designated, for example, the ink nozzle n for each ink dot position ₁ , N ₂ , N ₃ , N ₄ , N ₁ , ... can be specified.
[0152]
Ink can be ejected at a position deviated from a predetermined ink dot position based on a deviation of the ink ejection timing. This is effective when you want to discharge.
[0153]
By correcting the variation in the appropriate amount of ink, the amount of ink to be ejected at each ink dot position can be made constant.
[0154]
By performing a plurality of times of ink ejection, ink can be continuously ejected a plurality of times from one ink nozzle at one ink dot position.
[0155]
After the application pulse, the electric charge of the piezoelectric element PZT is discharged through a diode D as shown in FIG. ₂ Are connected in series, it is possible to control the method of discharging the electric charge (time change of the discharge amount) by adjusting the resistance, whereby the post-vibration of the piezoelectric element PZT is eliminated, and the ink liquid after the ink ejection is discharged. Can be held stably.
[0156]
Although the voltage waveform applied to the piezoelectric element PZT is a rectangular wave, it need not be a rectangular wave, and an arbitrary waveform may be applied to the piezoelectric element PZT. Further, the configuration of the control circuit can be simplified by employing the PWM drive. If an analog waveform is given, more precise control of the ink flow rate can be performed.
[0157]
The flow rate of the ink can also be controlled by controlling the pulse width of the voltage waveform applied to the piezoelectric element PZT.
[0158]
Therefore, the operation of the piezoelectric element PZT can be finely adjusted, and the ejection of ink can be controlled with high accuracy.
[0159]
Also, each ink nozzle n ₀ ~ N _n Each ink nozzle n in synchronization with the ink ejection operation from ₀ ~ N _n The LED for each strobe corresponding to the ink nozzles n is made to emit light. ₀ ~ N _n The LED for each strobe corresponding to the above is caused to emit light, and each ink nozzle n ₀ ~ N _n Of the ink ejected from the liquid can be observed.
[0160]
Next, a second embodiment of the present invention will be described. 1 and 5 are denoted by the same reference numerals, and detailed description thereof will be omitted.
[0161]
In the second embodiment of the present invention, a plurality of ink nozzles n ₀ ~ N _n Are arranged in a line, and three heads 1 are used exclusively for R (red), G (green) and B (blue) as shown in FIGS. Hereinafter, the head 1 for R is referred to as 1R, the head 1 for G is referred to as 1G, and the head 1 for B is referred to as 1B.
[0162]
These heads 1R, 1G, and 1B have a plurality of ink nozzles n. ₀ ~ N _n (For example, 256 nozzles) are arranged in a line at a nozzle interval of, for example, 1200 μm. These heads 1R, 1G, and 1B are rotatably provided to make the ink dot interval arbitrarily variable. The intervals between the heads 1R, 1G, and 1B are set at intervals W that do not interfere with each other by rotation. Since each of the RGB application points forms a color by applying these three colors of RGB in the vicinity of one pixel, the actual position is slightly before or after the interval W.
[0163]
These heads 1R, 1G, and 1B are tilted so that each ink nozzle n in the Y direction ₀ ~ N _n (Pixel pitch) is set to 150 μm. The head tilting means may tilt using an XYθ stage that supports the object to be coated, or may tilt the ink head itself. If the heads 1R, 1G, and 1B are moved in the X direction as shown in FIGS. 11 and 12 while the heads 1R, 1G, and 1B are tilted, the ink dot interval in the Y direction becomes 150 μm.
[0164]
When the three heads 1R, 1G, and 1B are reciprocated (scanning in the X direction and scanning in the −X direction) with respect to the ink application target P to apply three colors of RGB, in the outward path, as shown in FIG. The head closest to the ink application target P is the head 1B. Ink nozzle n in this head 1B ₀ The distance from the point Ha to the point where the ink is first ejected and the ink is applied is Aa. Next, the ink nozzle n of the head 1G ₀ The distance from the point Ha to the point where the ink is first ejected and the ink is applied is Aa + W. Similarly, the ink nozzle n of the head 1R ₀ From the point Ha to which ink is first ejected and ink is applied is Aa + 2W.
[0165]
On the other hand, in the return path, the head closest to the ink application target P is the head 1R as shown in FIG. Ink nozzle n in this head 1R _n The distance from the point Hb where the ink is first ejected and the ink is applied is Ab. Next, the ink nozzle n of the head 1G _n From the point Hb where ink is first ejected and ink is applied is Ab + W. Similarly, the ink nozzle n of the head 1B _n From the point Hb where ink is first ejected and ink is applied is Ab + 2W.
[0166]
The head control method using these heads 1R, 1G, 1B ₀ ~ N _n The heads 1R, 1G, and 1B are tilted so that the ink application pitch in the Y direction on the ink application target P due to each ink ejection from the printer becomes an arbitrary pitch, for example, 150 μm. Further, the heads 1R, 1G, and 1B and the ink application target P are relatively moved in the X direction, and a count value corresponding to the ink application pitch (150 μm) in the X direction on the ink application target P is held. After each ink nozzle in each of the heads 1R, 1G, and 1B reaches a preset ink discharge start position by the relative movement between each of the heads 1R, 1G, and 1B and the ink application target P, each head 1R, Each time the relative movement distance (150 μm) between 1G, 1B and the ink application target P reaches a distance corresponding to the count value, each ink nozzle n of each head 1R, 1G, 1B ₀ ~ N _n To eject ink respectively.
[0167]
Next, an apparatus for manufacturing a display device using the above-described head control method will be described.
[0168]
FIG. 13 is a configuration diagram of a display device manufacturing apparatus. The display device manufacturing apparatus is provided for each of the heads 1R, 1G, and 1B.
[0169]
As shown in FIG. 12, the start counter 16 in the manufacturing apparatus of the display device used for the head 1B is configured such that the first ink application points Ha and Hb of the head 1B from the respective standby positions on the outward path (X direction) and the return path (−X direction). Each first count value corresponding to each distance Aa (X direction) and Ab (-X direction) to (X direction, -X direction) is set in advance. The start counter 16 starts counting in response to a start signal input through the ink ejection control circuit 12, and when each of the first count values of the head 1B is reached, the start counter 16 outputs each signal indicating that the distance Aa or Ab has been reached. It has a function of returning to the ink ejection control circuit 12.
[0170]
As shown in FIG. 12, the start counter 16 in the manufacturing apparatus of the display device used for the head 1G indicates that the first ink application point Ha, Hb from the standby position of the head 1G in the forward path (X direction) and the return path (−X direction). Each first count value corresponding to each distance Aa + W (X direction) and Ab + W (-X direction) to (X direction, -X direction) is set in advance. The start counter 16 starts counting in response to a start signal input through the ink discharge control circuit 12, and when each of the first count values of the head 1G is reached, the start counter 16 outputs each signal indicating that the distance Aa + W or Ab + W has been reached. It has a function of returning to the ink ejection control circuit 12.
[0171]
As shown in FIG. 12, the start counter 16 in the manufacturing apparatus of the display device used for the head 1R indicates that the first ink application point Ha, Hb from the standby position of the head 1R in the forward path (X direction) and the return path (−X direction). Each first count value corresponding to each distance Aa + 2W (X direction) and Ab + 2W (−X direction) to (X direction, −X direction) is set in advance. The start counter 16 starts counting in response to a start signal input through the ink discharge control circuit 12, and when reaching the first count value of the head 1R, outputs a signal notifying that the distance Aa + 2W or Ab + 2W has been reached. It has a function of returning to the ink ejection control circuit 12.
[0172]
In the dot counter 14, a second count value corresponding to an arbitrary ink application pitch, that is, an ink dot interval in the X direction of 150 μm, is set in advance, as in the first embodiment. The dot counter 14 performs a counting operation based on a signal from the X-axis encoder input via the receiver 13, and notifies that the ink dot interval has been reached when the count value reaches the second count value. It has a function of sending a signal to the ink ejection control circuit 12, clearing the count value each time the count value reaches the second count value, and repeating the count operation.
[0173]
The nozzle counter 15 is provided with a certain number of ink nozzles n, as in the first embodiment. ₀ ~ N _n-1 Starts the ink ejection and then the next ink nozzle n ₁ ~ N _n A third count value corresponding to a fixed distance B in which the head 1 moves in the X direction when the ink is ejected is set in advance. This nozzle counter 15 has a certain ink nozzle n ₀ ~ N _n-1 Count operation from the X-axis encoder input via the receiver 13 from the start of the ink discharge of the above, and when this count value reaches the third count value, a signal notifying that it has moved by a certain distance B is output. It has a function of sending it to the ink ejection control circuit 12, clearing the count value each time the count value reaches the second count value, and repeating the count operation.
[0174]
The apparatus control section 10 receives an outward return path instruction signal from the outside, and sends the outward return path instruction signal to the nozzle order switching circuit 50.
[0175]
Each of the heads 1R, 1G, and 1B is driven by 256 ink nozzles n in each of the heads 1R, 1G, and 1B. ₀ ~ N _n Is applied to each of the piezoelectric elements. The AMP circuit 20 controls each of the ink nozzles n output from the ink ejection control circuit 12. ₀ ~ N _n Each drive signal is boosted to a predetermined voltage and applied to each piezoelectric element.
[0176]
The nozzle order switching circuit 50 controls each ink nozzle n in each of the heads 1R, 1G, and 1B. ₀ ~ N _n The order of the voltage applied to each of the piezoelectric elements is switched, and as shown in FIG. 11, the ink nozzle n is moved in the forward path (X direction). ₀ ~ N _n When a voltage is applied to each piezoelectric element in the order of (a) and (b) in the reverse direction (−X direction) as shown in FIG. _n ~ N ₀ Are switched so that a voltage is applied to each piezoelectric element in the order of.
[0177]
Next, the operation of the apparatus configured as described above will be described with respect to the differences from the first embodiment.
[0178]
In performing the outward ink application shown in FIG. 11, in each of the RGB display device manufacturing apparatuses, each ink discharge control circuit 12 waits for input of a start / stop signal from the apparatus control unit 10. In this state, when a start signal and a forward direction instruction signal are input to the apparatus control unit 10, the ink applying operation is started in the manufacturing apparatus, and the heads 1R, 1G, and 1B are respectively moved from the standby position as shown in FIG. Start moving in the X direction.
[0179]
Further, the apparatus control section 10 receives an outward direction instruction signal from the outside and sends the outward direction instruction signal to the nozzle order switching circuit 50. This nozzle order switching circuit 50, when moving in the forward path (X direction) as shown in FIG. ₀ ~ N _n Voltage is applied to each piezoelectric element in the order described above.
[0180]
In this state, when a start signal is input to each device control unit 10 in the manufacturing apparatus of each display device of RGB, this start signal is input to the ink discharge control circuit 12 via the photocoupler 11.
[0181]
Each ink discharge control circuit 12 of the manufacturing apparatus of each display device of RGB starts the count operation of the start counter 16. As shown in FIG. 11, first count values corresponding to the distances Aa, Aa + W, and Aa + 2W of the heads 1R, 1G, and 1B from the standby position to the ink application point Ha are set in the start counter 16 in advance. The counting is started by a start signal input through each ink ejection control circuit 12.
[0182]
At the same time, each dot counter 14 is preset with a second count value corresponding to an ink dot interval of 150 μm in the X direction, and performs a count operation based on a signal from the X-axis encoder input via the receiver 13. When the count value reaches the second count value, a signal indicating that the ink dot interval has been reached is sent to the ink ejection control circuit 12, and each time the count value reaches the second count value, the count value is increased. Is cleared and the counting operation is repeated.
[0183]
Then, by moving the heads 1R, 1G, and 1B, first, the 0th ink head n of the head 1B ₀ Reaches the first ink application point Ha where ink is ejected as shown in FIG. 11, at the same time, the count value of the start counter 16 reaches the first count value. Therefore, the start counter 16 returns to the ink ejection control circuit 12 a signal indicating that the head 1B has reached the distance Aa.
[0184]
When receiving a signal from the start counter 16 indicating that the head 1B has reached the distance Aa, the ink discharge control circuit 12 determines that the count of the start counter 16 has been completed, and determines the 0th ink nozzle n of the head 1B. ₀ Operation control is started, and the 0th ink nozzle n ₀ Nozzle control is performed. Thus, the B (blue) ink is applied at the ink application point Ha.
[0185]
The head 1B further moves in the X direction, and in the same manner as shown in FIG. ₀ Is the ink dot position d ₂ , The dot counter 14 performs a counting operation in accordance with a signal from the X-axis encoder input via the receiver 13, in which a second count value corresponding to the ink dot interval 150 μm in the X direction is set in advance. When this count value reaches the second count value, the head 1B moves by the ink dot interval of 150 μm, and the 0th ink nozzle n ₀ Is the ink application point Ha (the ink dot position d shown in FIG. 3) ₁ To d) ₂ Is transmitted to the ink ejection control circuit 12.
[0186]
Thereafter, the dot counter 14 clears the count value and repeats the count operation each time the count value reaches the second count value, that is, every time the head 1B moves by the ink dot interval of 150 μm.
[0187]
Therefore, every time the dot value reaches the second count value, the dot counter 14 sends to the ink ejection control circuit 12 a signal indicating that the ink dot position has been reached.
[0188]
However, every time the head 1B moves by an ink dot interval of 150 μm, the ink ejection control circuit 12 ₀ Nozzle control is performed. Thereby, the 0th ink nozzle n ₀ Performs B (blue) ink application at every 150 μm ink dot interval.
[0189]
Next, the 0th ink head n of the head 1G ₀ Reaches the ink application point Ha where ink is first ejected as shown in FIG. 11, the start counter 16 simultaneously determines that the count value has reached the first count value and the head 1G has reached the distance Aa + W. A notification signal is returned to the ink ejection control circuit 12.
[0190]
When receiving a signal from the start counter 16 indicating that the head 1B has reached the distance Aa + W, the ink discharge control circuit 12 determines that the count of the start counter 16 has been completed, and determines the 0th ink nozzle n of the head 1G. ₀ Operation control is started, and the 0th ink nozzle n ₀ Nozzle control is performed. Thus, G (green) ink is applied at the ink application point Ha.
[0191]
The head 1G further moves in the X direction, and the 0th ink nozzle n ₀ Is the ink dot position d ₂ , The dot counter 14 reaches the second count value corresponding to the ink dot interval 150 μm in the X direction, so that the head 1G moves by the ink dot interval 150 μm, and the 0th ink nozzle n ₀ Is the ink application point Ha (the ink dot position d shown in FIG. 3) ₁ To d) ₂ Is transmitted to the ink ejection control circuit 12.
[0192]
Thereafter, every time the dot value reaches the second count value, the dot counter 14 sends to the ink ejection control circuit 12 a signal indicating that the ink dot position has been reached. However, every time the head 1G moves by the ink dot interval of 150 μm, the ink ejection control circuit 12 ₀ Nozzle control is performed. Thereby, the 0th ink nozzle n ₀ Performs G (green) ink application at ink dot intervals of 150 μm.
[0193]
Next, the 0th ink head n of the head 1R ₀ Reaches the first ink application point Ha where ink is to be ejected as shown in FIG. 11, at the same time, the start counter 16 determines that the count value has reached the first count value and the head 1B has reached the distance Aa + 2W. A notification signal is returned to the ink ejection control circuit 12.
[0194]
When receiving a signal from the start counter 16 indicating that the head 1B has reached the distance Aa + 2W, the ink ejection control circuit 12 determines that the count of the start counter 16 has been completed, and determines the 0th ink nozzle n of the head 1G. ₀ Operation control is started, and the 0th ink nozzle n ₀ Nozzle control is performed. Thus, the R (red) ink is applied at the ink application point Ha.
[0195]
The head 1R further moves in the X direction, and the 0th ink nozzle n ₀ Is the ink dot position d ₂ , The dot counter 14 reaches the second count value corresponding to the ink dot interval 150 μm in the X direction, so that the head 1R moves by the ink dot interval 150 μm, and the 0th ink nozzle n ₀ Is the ink application point Ha (the ink dot position d shown in FIG. 3) ₁ To d) ₂ Is transmitted to the ink ejection control circuit 12.
[0196]
Thereafter, every time the dot value reaches the second count value, the dot counter 14 sends to the ink ejection control circuit 12 a signal indicating that the ink dot position has been reached. However, every time the head 1G moves by the ink dot interval of 150 μm, the ink ejection control circuit 12 ₀ Nozzle control is performed. Thereby, the 0th ink nozzle n ₀ Performs R (red) ink application at ink dot intervals of 150 μm.
[0197]
Hereinafter, similarly to the first embodiment, each ink nozzle n of each of the heads 1R, 1G, and 1B ₀ ~ N _n Is performed on the ink application target P such as a color filter used for a display device, and each ink having one pixel of R, G, and B is applied in a grid point shape at an ink dot interval of, for example, 150 μm in the X and Y directions. You.
[0198]
On the other hand, in order to perform the ink return trip shown in FIG. 12, in each of the RGB display device manufacturing apparatuses, each ink discharge control circuit 12 waits for the input of a start / stop signal from the apparatus control unit 10. In this state, when a start signal and a return path instruction signal are input to the apparatus control unit 10, the ink applying operation is started in the manufacturing apparatus, and the heads 1R, 1G, and 1B are respectively moved from the standby positions as shown in FIG. -Start moving in the X direction.
[0199]
Further, the apparatus control section 10 receives a return path instruction signal from the outside and sends the return path instruction signal to the nozzle order switching circuit 50. When the nozzle order switching circuit 50 moves in the backward direction (−X direction) as shown in FIG. _n ~ N ₀ Voltage is applied to each piezoelectric element in the order described above.
[0200]
In this state, when a start signal is input to each device control unit 10 in the manufacturing apparatus of each display device of RGB, this start signal is input to the ink discharge control circuit 12 via the photocoupler 11.
[0201]
Each ink discharge control circuit 12 of the manufacturing apparatus of each display device of RGB starts the count operation of the start counter 16. In the start counter 16, as shown in FIG. 12, first count values corresponding to the distances Ab, Ab + W, Ab + 2W from the standby position to the ink application point Hb of each of the heads 1R, 1G, 1B are set in advance. The counting is started by a start signal input through each ink ejection control circuit 12.
[0202]
At the same time, each dot counter 14 is preset with a second count value corresponding to an ink dot interval of 150 μm in the X direction, and performs a count operation based on a signal from the X-axis encoder input via the receiver 13. When the count value reaches the second count value, a signal indicating that the ink dot interval has been reached is sent to the ink ejection control circuit 12, and each time the count value reaches the second count value, the count value is increased. Is cleared and the counting operation is repeated.
[0203]
Then, by the movement of each of the heads 1R, 1G, and 1B, first, the n-th ink head n of the head 1R _n Reaches the first ink application point Hb where ink is ejected as shown in FIG. 12, at the same time, the count value of the start counter 16 reaches the first count value. Accordingly, the start counter 16 returns to the ink ejection control circuit 12 a signal indicating that the head 1R has reached the distance Ab.
[0204]
When receiving a signal from the start counter 16 indicating that the head 1R has reached the distance Ab, the ink discharge control circuit 12 determines that the count of the start counter 16 has been completed, and determines the 0th ink nozzle n of the head 1R. ₀ Operation control is started, and the 0th ink nozzle n ₀ Nozzle control is performed. Thereby, R (red) ink is applied at the ink application point Hb.
[0205]
The head 1R further moves in the −X direction, and in the same manner as shown in FIG. ₀ Is the ink dot position d ₂ , The dot counter 14 performs a counting operation in accordance with a signal from the X-axis encoder input via the receiver 13, in which a second count value corresponding to the ink dot interval 150 μm in the X direction is set in advance. When this count value reaches the second count value, the head 1R moves by an ink dot interval of 150 μm, and the 0th ink nozzle n ₀ Is the ink application point Hb (the ink dot position d shown in FIG. 3) ₁ To d) ₂ Is transmitted to the ink ejection control circuit 12.
[0206]
Thereafter, the dot counter clears the count value and repeats the count operation each time the count value reaches the second count value, that is, every time the head 1R moves by the ink dot interval of 150 μm.
[0207]
Therefore, every time the dot value reaches the second count value, the dot counter 14 sends to the ink ejection control circuit 12 a signal indicating that the ink dot position has been reached.
[0208]
However, every time the head 1R moves by an ink dot interval of 150 μm, the ink ejection control circuit 12 ₀ Nozzle control is performed. Thereby, the 0th ink nozzle n ₀ Performs R (red) ink application at ink dot intervals of 150 μm.
[0209]
Next, the 0th ink head n of the head 1G ₀ Reaches the first ink application point Hb where ink is ejected as shown in FIG. 12, at the same time, the start counter 16 determines that the count value has reached the first count value and the head 1G has reached the distance Ab + W. A notification signal is returned to the ink ejection control circuit 12.
[0210]
When receiving a signal from the start counter 16 indicating that the head 1G has reached the distance Aa + W, the ink discharge control circuit 12 determines that the count of the start counter 16 has been completed, and determines the 0th ink nozzle n of the head 1G. ₀ Operation control is started, and the 0th ink nozzle n ₀ Nozzle control is performed. Thus, G (green) ink is applied at the ink application point Ha.
[0211]
The head 1G further moves in the −X direction, and the 0th ink nozzle n ₀ Is the ink dot position d ₂ , The dot counter 14 reaches the second count value corresponding to the ink dot interval 150 μm in the X direction, so that the head 1G moves by the ink dot interval 150 μm, and the 0th ink nozzle n ₀ Is the ink application point Ha (the ink dot position d shown in FIG. 3) ₁ To d) ₂ Is transmitted to the ink ejection control circuit 12.
[0212]
Thereafter, every time the dot value reaches the second count value, the dot counter 14 sends to the ink ejection control circuit 12 a signal indicating that the ink dot position has been reached. However, every time the head 1G moves by the ink dot interval of 150 μm, the ink ejection control circuit 12 ₀ Nozzle control is performed. Thereby, the 0th ink nozzle n ₀ Performs G (green) ink application at an ink dot interval of 150 μm.
[0213]
Next, the 0th ink head n of the head 1B ₀ Reaches the ink application point Hb shown in FIG. 12, the start counter 16 simultaneously outputs a signal notifying that the count value has reached the first count value and the head 1B has reached the distance Aa + 2W. Return to circuit 12.
[0214]
When receiving a signal from the start counter 16 indicating that the head 1B has reached the distance Aa + 2W, the ink ejection control circuit 12 determines that the count of the start counter 16 has been completed, and determines the 0th ink nozzle n of the head 1B. ₀ Operation control is started, and the 0th ink nozzle n ₀ Nozzle control is performed. Thus, B (blue) ink is applied at the ink application point Hb.
[0215]
The head 1B further moves in the −X direction, and the 0th ink nozzle n ₀ Is the ink dot position d ₂ , The dot counter 14 reaches the second count value corresponding to the ink dot interval 150 μm in the X direction, so that the head 1B moves by the ink dot interval 150 μm, and the 0th ink nozzle n ₀ Is the ink application point Hb (the ink dot position d shown in FIG. 3) ₁ To d) ₂ Is transmitted to the ink ejection control circuit 12.
[0216]
Thereafter, every time the dot value reaches the second count value, the dot counter 14 sends to the ink ejection control circuit 12 a signal indicating that the ink dot position has been reached. However, every time the head 1B moves by an ink dot interval of 150 μm, the ink ejection control circuit 12 ₀ Nozzle control is performed. Thereby, the 0th ink nozzle n ₀ Performs B (blue) ink application at every 150 μm ink dot interval.
[0219]
Hereinafter, similarly to the first embodiment, each ink nozzle n of each of the heads 1R, 1G, and 1B _n ~ N ₀ Is performed on the ink application target P such as a color filter used for a display device, and each ink having one pixel of R, G, and B is applied in a grid point shape at an ink dot interval of, for example, 150 μm in the X and Y directions. You.
[0218]
As described above, in the second embodiment, each of the ink nozzles n of each of the heads 1R, 1G, and 1B _n ~ N ₀ The heads 1R, 1G, and 1B are tilted so that the ink application pitch of the heads 1R, 1G, and 1B becomes an arbitrary pitch, for example, 150 μm. Each first count value corresponding to each distance Aa and Ab to each of the first ink application points Ha and Hb, and each distance from each standby position of the head 1G to the first and second ink application points Ha and Hb. A first count value corresponding to Aa + W and Ab + W, and a first count value corresponding to each distance Aa + 2W and Ab + 2W from each standby position of the head 1R to the first ink application point Ha and Hb. It was set.
[0219]
As a result, it is needless to say that the same effect as in the first embodiment can be obtained, and it is possible to use the three heads 1R, 1G, and 1B to perform the R, G, and B colors in the XY directions at an ink dot interval of, for example, 150 μm. As one pixel, these colors of ink can be applied in the form of lattice points. Accordingly, the display device can be manufactured by applying the R, G, and B inks to an ink application target such as a color filter used for the display device.
[0220]
Also, each start counter 16 has a first count value corresponding to each distance Aa, Ab of the reciprocating path of each head 1B, and a first count value corresponding to each distance Aa + W, Ab + W of the reciprocating path of the head 1G. And the first count value corresponding to each distance Aa + 2W, Ab + 2W of the reciprocating path of the head 1R, the heads 1R, 1G, and 1B are reciprocated with respect to the ink application target P, In each of the R, G, and B colors, one pixel is formed at a dot interval of, for example, 150 μm in both the X and Y directions. This makes it possible to increase the speed at which the R, G, and B color inks are applied in the form of lattice points.
[0221]
Next, an application example of the second embodiment of the present invention will be described.
[0222]
FIG. 14 is a configuration diagram of a manufacturing apparatus of a display device for applying R, G, and B inks on the surface of a glass substrate 60 of EL (Electroluminescence). An X stage 62 is provided on the stage table 61. The X stage 62 can reciprocate on the stage table 61 in the X direction and the −X direction.
[0223]
Above the X stage 62, a θ stage 63 is provided. Below the θ stage 63, for example, three heads 1R, 1G, and 1B are provided. stage 63 tilts each of the heads 1R, 1G, and 1B, and moves each ink nozzle n in the Y direction. ₀ ~ N _n (Pixel pitch) is set to an arbitrary ink dot interval, for example, 150 μm. The number of heads 1 provided below the θ stage 63 may be any color, for example, a desired color of RGB or YMCK.
[0224]
The θ stage 63 provided with each of the heads 1R, 1G, and 1B is provided so that the distance between the glass substrate 60 on the X stage 62 and each of the heads 1R, 1G, and 1B is set to, for example, 0.3 to 0.5 mm. .
[0225]
The control device 64 has the circuit configuration of the display device manufacturing apparatus shown in FIG. 13 as in the second embodiment, and the start counter 16 for each of the heads 1R, 1G, and 1B has the forward path of the head 1B. Each first count value corresponding to each distance Aa and Ab from each standby position on the return path to each of the first ink application points Ha and Hb, and the first ink application point Ha from each standby position on the outward return path of the head 1G. , Hb, and the first count values corresponding to the distances Aa + W and Ab + W, and the respective distances Aa + 2W and Ab + 2W from the respective standby positions of the head 1R to the first ink application points Ha and Hb. A first count value is set.
[0226]
The control device 64 controls the θ stage 63 to incline each of the heads 1R, 1G, and 1B so that each of the ink nozzles n in the Y direction ₀ ~ N _n Is set to an arbitrary ink dot interval, for example, 150 μm.
[0227]
The control device 64 moves the X stage 62 in the X direction or the −X direction, and relatively moves the tilted heads 1R, 1G, 1B and the glass substrate 60.
[0228]
In addition, the control device 64 controls the relative movement between the heads 1R, 1G, 1B and the glass substrate 60 to control the ink nozzles n in the heads 1R, 1G, 1B. ₀ ~ N _n Reach the preset ink discharge start positions (d1 shown in FIG. 3, the first ink application point Ha shown in FIG. 11, and the first ink application point Hb shown in FIG. 12). Each ink nozzle n of each of the heads 1R, 1G, 1B is repeated every time the relative moving distance between the glass substrate 60 and the glass substrate 60 reaches 150 μm. ₀ ~ N _n To eject ink respectively.
[0229]
Thus, the EL display device can be manufactured by applying the R, G, and B inks on the surface of the glass substrate 60.
[0230]
It should be noted that the present invention is not limited to the above-described first and second embodiments, and can be variously modified in an implementation stage without departing from the gist of the invention.
[0231]
Furthermore, the above embodiments include inventions at various stages, and various inventions can be extracted by appropriately combining a plurality of disclosed constituent features. For example, even if some components are deleted from all the components shown in the embodiment, the problem described in the column of the problem to be solved by the invention can be solved, and the problem described in the column of the effect of the invention can be solved. In the case where the effect is obtained, a configuration from which this configuration requirement is deleted can be extracted as an invention.
[0232]
For example, in the first embodiment, the nozzle interval of the head 1 is set to 1200 μm and the ink dot interval is set to 150 μm. However, the present invention is not limited to this, and the present invention can be implemented with arbitrary nozzle intervals and ink dot intervals. .
[0233]
Further, when the distance is fractional than 1 μm unit, for example, when the ink dot interval is 150.5 μm, ink can be ejected without a large error by measuring 150 μm at the first time and 199 μm at the second time. .
[0234]
In addition, the ink ejection control circuit 12 is realized by incorporating a software-based algorithm while using a programmable logic with hardware using a programmable device. And the functions of the ink ejection control circuit 12 may be processed by a program.
[0235]
In addition, instead of moving only the head 1, an ink application target such as a color filter used for a display device may be moved, or the head 1 and the ink application target may be relatively moved.
[0236]
Further, it can be used in a manufacturing process of a color filter of a liquid crystal display device or an EL display device.
[0237]
In the above-described second embodiment, the case where the inks of the respective colors of R, G, and B are applied using the three heads 1R, 1G, and 1B has been described. However, the present invention is not limited to this. A plurality of heads may be provided.
[0238]
The ink is not limited to being applied by reciprocating the three heads 1R, 1G, and 1B, but may be applied by reciprocating one head 1 to apply an ink of an arbitrary color.
[0239]
The first and second embodiments of the present invention can be applied to a printer. If the first and second embodiments are applied to a printer, Y (yellow), M (magenta), C (cyan), and K (black) can be used. Each ink is applied.
[0240]
【The invention's effect】
As described above in detail, according to the present invention, a single scan is performed using an existing head in which a plurality of ink nozzles are arranged in a line, and ink from each of the ink nozzles is arranged for an arbitrary specification of an ink dot interval. A head control method capable of discharging, a method of manufacturing a display device for applying ink to an ink application target of the display device using the head control method, and a device therefor can be provided.
[Brief description of the drawings]
FIG. 1 is a diagram showing a tilt of a head for obtaining an arbitrary ink dot interval in a first embodiment of a head control method according to the present invention.
FIG. 2 is a view showing an arbitrary ink dot interval in the first embodiment of the head control method according to the present invention.
FIG. 3 is a diagram for explaining a grid point application method in the first embodiment of the head control method according to the present invention.
FIG. 4 is a view for explaining a moving distance of a head which performs first ink ejection after the first ink nozzle in the first embodiment of the head control method according to the present invention.
FIG. 5 is a configuration diagram of a display device manufacturing apparatus to which the first embodiment of the head control method according to the present invention is applied.
FIG. 6 is a schematic diagram of data stored in a memory device in the display device manufacturing apparatus according to the first embodiment of the present invention.
FIG. 7 is a configuration diagram of an AMP circuit in the first embodiment of the display device manufacturing apparatus according to the present invention.
FIG. 8 is a specific block configuration diagram of an ink discharge control circuit in the first embodiment of the display device manufacturing apparatus according to the present invention.
FIG. 9 is a head control flowchart in the first embodiment of the apparatus for manufacturing a display device according to the present invention.
FIG. 10 is a nozzle control flowchart in the first embodiment of the display device manufacturing apparatus according to the present invention.
FIG. 11 is a view showing the movement of each head for RGB in the X direction to which the second embodiment of the head control method according to the present invention is applied.
FIG. 12 is a diagram showing the movement of each head for RGB in the −X direction to which the second embodiment of the head control method according to the present invention is applied.
FIG. 13 is a configuration diagram of a display device manufacturing apparatus to which a second embodiment of the head control method according to the present invention is applied.
FIG. 14 is a configuration diagram showing an application example of the head control method according to the present invention.
[Explanation of symbols]
n ₀ ~ N _n : Ink nozzle, 1: head, PZT: piezoelectric element, 10: device controller, 11: photocoupler, 12: ink ejection control circuit, 13: receiver, 14: dot counter, 15: nozzle counter, 16: start counter, 17: Memory device, 18: Memory device, 19: Crystal oscillator, 20: AMP circuit, 21, 22: Timing circuit, 30: Start count processing unit, 31: Nozzle count processing unit, 32: Dot count processing unit, 33: No. 0 nozzle start part, 34: drive pulse control part, 35: nth nozzle start part, 36: dot counter latch part, 37: dot total number confirmation part, 38: waveform formation part, 39: end part, 40: memory address Setting section, 41: waveform output section, 42: position correction value input latch section, 43: waveform number input latch section, 44: nozzle number Force the latch portion, 45: waveform data input unit, 46: idle driving pulse unit, 50: nozzle sequence switching circuit, 60: Glass substrate, 61: stage stand, 62: X-stage, 63: theta stage, 64: controller.

Claims (27)

In a head control method for controlling the timing of ink ejection from each of the ink nozzles of a head having a plurality of ink nozzles arranged in a line, one-way ink application on an ink application target by each ink ejection from each of the ink nozzles Tilting the head so that the pitch becomes an arbitrary pitch, a step of relatively moving the head and the ink application target in the other direction in the tilted state,
Each of the ink nozzles holds a count value corresponding to the desired ink application pitch in the other direction on the ink application target, and the ink nozzles are respectively set in advance by relative movement between the head and the ink application target. After reaching the ejection start position, repeatedly ejecting the ink from the ink nozzles each time the relative movement distance between the head and the ink application target reaches a distance corresponding to the count value,
A head control method comprising: In a head control method for providing a plurality of heads in which a plurality of ink nozzles are arranged in a line at predetermined intervals and controlling the timing of ink ejection from each of the ink nozzles of these heads,
The plurality of heads are tilted so that the ink application pitch in one direction on the ink application target by each ink ejection from each of the ink nozzles becomes an arbitrary pitch, and these heads and the ink application target are relatively moved in the other direction. Moving to the
The ink nozzles in the plurality of heads hold a count value corresponding to the desired ink application pitch in the other direction on the ink application target, and are moved relative to the plurality of heads and the ink application target. After each of the plurality of heads reaches the preset ink discharge start position, the relative movement distance between the plurality of heads and the ink application target repeatedly reaches the distance corresponding to the count value. Discharging the ink from each of the ink nozzles,
A head control method comprising: The step of ejecting the ink holds a first count value corresponding to a relative movement distance between the head and the ink application target with respect to the ink nozzle that first ejects the ink,
Holding a second count value corresponding to the ink application pitch in the other direction,
Holding a third count value corresponding to a relative distance between the head and the ink application target that move until the next ink nozzle ejects the ink from the ink nozzle that ejected the ink,
A step of relatively moving the head and the ink application target, and discharging the ink from the ink nozzle that first discharges the ink when moved by a distance corresponding to the first count value;
A distance corresponding to the third count value of the ink nozzle ejecting the ink for the first time after the ink nozzle ejecting the ink for the first time due to the relative movement between the head and the ink application target; Ejecting the ink for the first time from each of the ink nozzles each time the ink nozzle moves,
A step of repeatedly discharging the ink each time the ink nozzle that has discharged the ink for the first time by the relative movement between the head and the ink application target moves by a distance corresponding to the second count value; ,
2. The head control method according to claim 1, further comprising: The step of discharging the ink includes a plurality of first nozzles corresponding to relative moving distances between the plurality of heads and the ink application target with respect to each of the ink nozzles that first discharges the ink for each of the plurality of heads. Hold the count value of
Holding a second count value corresponding to the ink application pitch in the other direction,
A third count value corresponding to a relative distance between the head and the ink application target, which moves from the ink nozzle that has ejected the ink in the plurality of heads until the next ink nozzle ejects the ink; Hold,
The plurality of heads and the ink application target are relatively moved, and when the plurality of heads move by a distance corresponding to the first count value, the plurality of heads first discharge the ink. Ejecting the ink for the first time from the ink nozzle,
The ink nozzle ejecting the ink at the first time after the ink nozzle ejecting the ink at the first time by the relative movement between the plurality of heads and the ink application target corresponds to the third count value Ejecting the ink for the first time from each of the ink nozzles each time the ink nozzle moves by a distance corresponding to
The ink is repeatedly ejected every time the ink nozzles that ejected the ink for the first time by the relative movement between the plurality of heads and the ink application target move by a distance corresponding to the second count value. Process and
3. The head control method according to claim 2, comprising: 2. The head control method according to claim 1, further comprising a step of reciprocating the head and the ink application target in the other direction. 3. The head control method according to claim 2, further comprising a step of reciprocating the plurality of heads and the ink application target in the other direction. Holding a count value corresponding to the ink application pitch in the other direction on the ink application target,
After each of the ink nozzles reaches a preset ink discharge start position by the relative movement between the head and the ink application target, the relative movement distance between the head and the ink application target is counted. Each time the distance corresponding to the value is reached, the ink is repeatedly ejected from the ink nozzles,
The order of the plurality of ink nozzles that ejects the ink from the plurality of ink nozzles in the head is reversed in the forward path and the return path in the reciprocating movement between the head and the ink application target. The head control method according to claim 1. The step of discharging the ink includes a plurality of first nozzles corresponding to relative moving distances between the plurality of heads and the ink application target with respect to each of the ink nozzles that first discharges the ink for each of the plurality of heads. Hold the count value of
Holding a second count value corresponding to the ink application pitch in the other direction,
A third count value corresponding to a relative distance between the head and the ink application target, which moves from the ink nozzle that has ejected the ink in the plurality of heads until the next ink nozzle ejects the ink; Hold,
When the plurality of heads and the ink application target are moved in a forward direction or a backward direction, when the plurality of heads move by a distance corresponding to each of the first count values, the plurality of heads are moved. In the first step of discharging the ink for the first time from the ink nozzle that discharges the ink,
Each time the ink nozzle that discharges the ink next to the ink nozzle that discharges the ink by the reciprocating movement between the plurality of heads and the ink application target moves by a distance corresponding to the third count value, A step of ejecting the ink for the first time, and switching the order of ejecting the ink from the plurality of ink nozzles in the plurality of heads in the forward path and the return path in reverse.
In the reciprocating movement between the plurality of heads and the ink application target, the ink is repeatedly ejected each time the ink nozzle that ejected the ink for the first time moves by a distance corresponding to the second count value, And in the forward path and the return path, a step of switching the order of the plurality of ink nozzles that ejects the ink from the plurality of ink nozzles in reverse,
3. The head control method according to claim 2, comprising: For each of a plurality of ink application positions on the ink application target which ejects the ink from the plurality of ink nozzles, a plurality of parameters relating to ink ejection conditions for each of the ink application positions are held, and each of the ink nozzles is stored in accordance with these parameters. 3. The head control method according to claim 1, wherein said ink ejection operation is controlled. 10. The ink ejection condition according to claim 9, wherein at least one of a shift in the ejection timing of the ink, a variation in an appropriate amount of the ink, and a plurality of ink ejections is selected. Head control method. 3. The head control method according to claim 1, wherein the operation of discharging the ink from the plurality of ink nozzles arbitrarily changes a voltage waveform applied to a piezoelectric element provided in an ink flow path. . In a method of manufacturing a display device, a plurality of ink nozzles are arranged in a line to eject ink from the ink nozzles of the head and apply the ink to an ink application target for the display device.
The head is tilted so that an ink application pitch in one direction on the ink application target by each ink ejection from each of the ink nozzles becomes an arbitrary pitch, and the head and the ink application target are relatively positioned in this inclined state. Moving in another direction,
The ink nozzle holds a count value corresponding to the desired ink application pitch in the other direction on the ink application target, and the ink nozzles are respectively set in advance by relative movement between the head and the ink application target. After reaching the ejection start position, repeatedly ejecting the ink from the ink nozzles each time the relative movement distance between the head and the ink application target reaches a distance corresponding to the count value,
A method for manufacturing a display device, comprising: A method of manufacturing a display device in which a plurality of heads in which a plurality of ink nozzles are arranged in a line is provided at predetermined intervals and ink is ejected from the ink nozzles of the heads and applied to an ink application target for the display device.
The plurality of heads are tilted so that an ink application pitch in one direction on the ink application target by each ink ejection from each of the ink nozzles becomes an arbitrary pitch, and the plurality of heads and the ink application target are tilted in this inclined state. Moving relatively in the other direction,
Holding a count value corresponding to the ink application pitch in the other direction on the ink application target, the relative movement between the plurality of heads and the ink application target, the respective ink nozzles in the plurality of heads respectively After reaching a preset ink discharge start position, each time the relative movement distance between the plurality of heads and the ink application target reaches a distance corresponding to the count value, the respective ones of the plurality of heads are repeatedly set. Discharging the ink from ink nozzles, respectively. 14. A method for manufacturing a display device according to claim 12, wherein the head control method according to any one of claims 3 to 11 is applied. In a display device manufacturing apparatus that ejects ink from the ink nozzles of a head in which a plurality of ink nozzles are arranged in a line and applies the ink to an ink application target for the display device,
The head and the ink application target are relatively moved in a state where the head is tilted so that the ink application pitch in one direction on the ink application target by each ink ejection from each of the ink nozzles becomes an arbitrary pitch. Means of transportation
A counter that holds a count value corresponding to at least the desired ink application pitch in the other direction on the ink application target,
After each of the ink nozzles reaches a preset ink discharge start position by the relative movement between the head and the ink application target, the relative movement distance between the head and the ink application target is counted. An ink discharge control unit that repeatedly discharges the ink from each of the ink nozzles each time a distance corresponding to the value is reached,
An apparatus for manufacturing a display device, comprising: In a display device manufacturing apparatus, a plurality of heads in which a plurality of ink nozzles are arranged in a line are provided at predetermined intervals, and ink is ejected from the ink nozzles of these heads and applied to an ink application target for the display device.
In a state where the plurality of heads are tilted such that an ink application pitch in one direction on the ink application target by each ink ejection from each of the ink nozzles in the plurality of heads becomes an arbitrary pitch, the plurality of heads and Moving means for relatively moving the ink application target;
A counter that holds a count value corresponding to at least the desired ink application pitch in the other direction on the ink application target,
After each of the ink nozzles reaches a preset ink discharge start position for each of the plurality of heads due to relative movement between the plurality of heads and the ink application target, the plurality of heads and the ink application target An ink discharge control unit that repeatedly discharges the ink from each of the ink nozzles for each of the plurality of heads each time a relative movement distance with respect to reaches a distance corresponding to the count value;
An apparatus for manufacturing a display device, comprising: 17. The apparatus according to claim 15, wherein the moving unit reciprocates one head or the plurality of heads and the ink application target in the other direction. A start counter that holds a first count value corresponding to a relative movement distance between the head and the ink application target with respect to the ink nozzle that first discharges the ink;
A dot counter that holds a second count value corresponding to the ink application pitch in the other direction on the ink application target;
A nozzle counter that holds a third count value corresponding to a relative distance between the head that moves to eject the ink from the ink nozzle that ejected the ink by the next ink nozzle and the ink application target When,
17. The apparatus for manufacturing a display device according to claim 15, comprising: The ink ejection control means, when the head and the ink application target relatively move in the other direction by a distance corresponding to the first count value held in the start counter, first, the A function of discharging the ink for the first time from the ink nozzle that discharges ink,
The ink nozzle that discharges the ink at the first time after the ink nozzle that discharges the ink at the first time by the relative movement between the head and the ink application target is held by the nozzle counter. A function of discharging the ink each time the ink cartridge moves by a distance corresponding to the count value of 3;
Due to the relative movement between the head and the ink application target, each of the ink nozzles that ejected each of the inks for the first time moves by a distance corresponding to the second count value held in the dot counter. A function of repeatedly discharging the ink every time,
17. The apparatus for manufacturing a display device according to claim 15, comprising: When the head and the ink application target are reciprocated by the moving unit,
The ink ejection control means reverses the order of the plurality of ink nozzles for ejecting the ink from the plurality of ink nozzles in the head in the forward path and the return path in the reciprocating movement between the head and the ink application target. 18. The apparatus for manufacturing a display device according to claim 17, wherein the switching is performed. When the plurality of heads and the ink application target are reciprocated by the moving unit,
The counter calculates a plurality of first count values corresponding to respective relative moving distances between the plurality of heads and the ink application target with respect to each of the ink nozzles that first ejects the ink for each of the plurality of heads. A start counter to hold,
A dot counter for holding a second count value corresponding to the ink application pitch in the other direction for each of the plurality of heads;
A third count value corresponding to a relative distance between the head and the ink application target, which moves from the ink nozzle that has ejected the ink in the plurality of heads until the next ink nozzle ejects the ink; 18. The apparatus for manufacturing a display device according to claim 17, further comprising: a nozzle counter that holds a value. When the plurality of heads and the ink application target are reciprocated by the moving unit,
When the plurality of heads and the ink application target are moved in a forward direction or a backward direction, the plurality of heads are moved by respective distances corresponding to the respective first count values. When ejecting the ink for the first time from the ink nozzle that first ejects the ink in the plurality of heads,
A distance corresponding to the third count value of the ink nozzle that discharges the ink at the first time after the ink nozzle that discharges the ink at the first time by reciprocating movement between the plurality of heads and the ink application target; The ink is ejected every time it moves, and in the forward path and the return path, the order of ejecting the ink from the plurality of ink nozzles in the plurality of heads is switched in reverse,
And, each time the ink nozzles that have ejected the ink for the first time by the reciprocating movement of the plurality of heads and the ink application target move by a distance corresponding to the second count value, the ink nozzles repeatedly eject the ink nozzles, In the return path, a step of switching the order of ejecting the ink from the plurality of ink nozzles in the plurality of heads in reverse,
18. The apparatus for manufacturing a display device according to claim 17, comprising: For each of a plurality of ink application positions where the ink is applied, an ink discharge condition storage unit that holds a plurality of parameters relating to ink discharge conditions for each of these ink application positions,
Nozzle control means for controlling the ink discharge operation of each ink nozzle according to the parameters stored in the ink discharge condition storage means,
23. The apparatus for manufacturing a display device according to at least one of claims 15 to 22, further comprising: A light emitting element configured to emit light at a timing at which the ink is ejected from each of the ink nozzles,
23. The apparatus for manufacturing a display device according to at least one of claims 15 to 22, wherein a timing of the light emission is configured to be changeable. The ink discharge condition storage means stores at least one of a shift of the discharge timing of the ink, a correction of a variation in an appropriate amount of the ink, or a plurality of the ink discharges as the ink discharge condition. 24. The apparatus for manufacturing a display device according to claim 23, wherein: 24. The display device according to claim 23, wherein the nozzle control unit performs an ejection operation of the ink from the ink nozzle by arbitrarily changing a voltage waveform applied to a piezoelectric element provided in an ink flow path. Manufacturing equipment. 23. The apparatus for manufacturing a display device according to at least one of claims 15 to 22, further comprising control means for controlling a method of discharging the electric charge charged in the piezoelectric element.

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