TWI487627B - Inkjet chip - Google Patents

Description

Inkjet wafer

This is a wafer, especially an inkjet wafer that can control the most inkjet components with a minimum of control contacts.

In recent years, with the popularization of personal computers and the continuous development of industrial technology, printing equipment has become an indispensable product in the periphery of personal computers in enterprises or homes, and users are sensitive to the efficiency, function and precision of printing equipment. The demand for degree is also gradually increasing. It is hoped that the printing equipment can meet the requirements of printing quality and printing speed while minimizing the volume.

Conventional printing equipment requires multiple ink cartridges to be mounted on the carrier of the printing device for multi-color printing. Therefore, the volume of the carrier in the horizontal direction must be increased by the volume of the ink cartridge, and the moving distance of the carrier inside the printing device is also increased, and the housing space inside the printing device must be increased to make the volume. It is difficult to meet the current trend of miniaturization of electronic products.

In addition, in order to improve the printing speed and print quality, it is necessary to add an ink jet element to an ink jet head of a conventional ink cartridge. Please refer to FIG. 1 , which is a schematic circuit diagram of a conventional ink jet element. As shown in FIG. 1, the conventional ink-jet element 1 uses the characteristics of a resistor 11 and a metal-oxide-emitting field-effect transistor (MOSFET) to control the ink-jetting operation of the ink-jet head. Due to The technique is to control the operation of the single ink-jet element 1 by using a single control contact 13. Therefore, if the number of the ink-jet elements 1 is to be increased, the control contact 13 must be relatively increased, so that the entire ink-jet wafer needs to be accommodated. Corresponding expansion. Of course, the volume of the inkjet cartridge will inevitably increase, resulting in a dilemma in terms of print quality and volume reduction. Moreover, the increase in the number of control contacts 13 also increases the cost of the process, and the phenomenon that the lines interfere with each other, which reduces the work efficiency, and the printing work takes longer to complete, and the user is also invisibly added. Time cost.

Therefore, how to develop an ink jet chip which is sufficient to improve the above-mentioned conventional technology and which can control the ink jet element with the least control point to reduce the cost and reduce the volume is an urgent problem to be solved.

The main purpose of the present invention is to provide an inkjet wafer, which solves the problem that the size of the conventional inkjet wafer is enlarged with the increase of the control contact, and the volume of the inkjet cartridge is increased, which leads to high manufacturing cost and easy line interference. Shortcomings such as phenomena.

Another object of the present invention is to provide an ink jet wafer to achieve the most control of the ink jet heating element with a minimum of control contacts to reduce cost and reduce its own volume, thereby achieving the effect of reducing the volume of the ink jet cartridge.

In order to achieve the above objective, a preferred embodiment of the present invention provides an inkjet chip that receives at least one energy signal and at least one first signal, at least one second signal, and at least one nth signal outputted by a printing device, wherein n is a natural number greater than or equal to 3, the inkjet wafer includes: an inkjet heating element receiving the energy signal output by the printing device; and an inkjet control circuit comprising: a first switching element to an nth switch An element, wherein: the first switching element is electrically connected to the printing device to receive the first signal and the second signal output by the printing device, and generate a first signal and the second signal a second switch control signal; the n-1th switch element is electrically connected to the n-2th switch element and the printing device to receive an n-1th switch control signal of the n-2th switch element output And the nth signal output by the printing device, and generating an nth switch control signal according to the n-1th switch control signal and the nth signal; the nth switch element and the n-1th switch element and the The inkjet heating element is electrically connected to receive the nth switch control signal output by the n-1th switch element; wherein the inkjet heating element receives the energy signal output by the printing device, according to the nth switch The control signal is turned on to ground to generate heat for ink ejection.

1‧‧‧ inkjet components

11‧‧‧resistance

12‧‧‧Gold oxygen half-field effect transistor

13‧‧‧Control contacts

2‧‧‧Inkjet wafer

21‧‧‧Inkjet heating elements

22‧‧‧Inkjet Control Circuit

23, RD‧‧‧ pull-down resistor

221, sw1‧‧‧ first switching element

222, sw2‧‧‧ second switching element

223‧‧‧ Third switching element

224‧‧‧ Pull-down resistor

A‧‧‧ address signal

H‧‧‧third switch control signal

K2, T‧‧‧ second switch control signal

Kn-1‧‧‧n-1 switch control signal

Kn‧‧‧n switch control signal

P‧‧‧Energy signal

Q‧‧‧Control signal

S‧‧‧Select signal

Swn-2‧‧‧n-2th switching element

Swn-1‧‧‧n-1th switching element

Swn‧‧‧nth switching element

A1~A5‧‧‧First address signal~5th address signal

C1~Cn‧‧‧first signal~nth signal

P1~P20‧‧‧First Energy Signal~Twenty Energy Signal

Q1~Q3‧‧‧First Control Signal~Third Control Signal

S1~S2‧‧‧First choice signal~Second selection signal

Figure 1 is a schematic circuit diagram of a conventional ink jet element.

Figure 2 is a block diagram showing the circuit of the ink jet wafer and printing apparatus of the preferred embodiment of the present invention.

Figure 3 is a block diagram of the circuit of the ink jet wafer shown in Figure 2.

Figure 4 is a block diagram showing the circuit of an ink jet chip according to another embodiment of the present invention.

Fig. 5 is a block diagram showing the ink-jet chip circuit when the ink-jet control circuit of the present invention is a two-layer circuit.

Figure 6 is a block diagram showing the ink-jet chip circuit of the two-layer circuit of another embodiment of the present invention.

Figure 7 is a circuit diagram showing the connection of the pull-down resistors in the ink-jet wafer for each signal contact generated by the printing device of the present invention.

Figure 8 is a signal-time map of the ink jet control circuit of another embodiment of the present invention when it is ejected in the forward direction.

Figure 9 is a signal-time map of the address signal when it is inked in the forward direction.

Figure 10 is a signal-time map of the ink jet control circuit of another embodiment of the present invention when it is reversely ejected.

Figure 11 is a signal-time map of the address signal when it is reversely ejected.

Some exemplary embodiments embodying the features and advantages of the present invention are described in detail in the following description. It should be understood that the present invention is capable of various modifications in the various aspects of the present invention, and the description and drawings are intended to be illustrative and not limiting.

Please refer to FIG. 2 and FIG. 3, which are circuit block diagrams of the inkjet wafer and printing apparatus of the preferred embodiment of the present invention, respectively, and circuit block diagrams of the inkjet wafer shown in FIG. As shown in FIGS. 2 and 3, the inkjet wafer 2 of the present invention is applied to the printing apparatus 3, and includes at least an inkjet heating element 21 and an inkjet control circuit 22. The inkjet heating element 21 can be electrically connected to the printing device 3 to receive the energy signal P output by the printing device 3. The printing device 3 can be, for example but not limited to, a printer body, and the inkjet wafer 2 can be disposed on a printing head of a printing cartridge.

The inkjet control circuit 22 includes at least a first switching element sw1 to an nth switching element swn, and the first to nth switching elements sw1 to swn may be N-type MOSFETs, but not limited thereto, and n It is a natural number greater than or equal to 3, so that the inkjet control circuit 22 is at least an n-1 level control circuit. The first switching element sw1 is electrically connected to the printing device 3 to receive the first signal C1 and the second signal output by the printing device. No. C2, and generating a second switch control signal K2 according to the first signal C1 and the second signal C2. The first signal C1 can be a control signal, and the second signal C2 can be a selection signal. The third signal C3 to the nth signal Cn can be an address signal. When the first signal C1 is in an enable state, That is, when C1=1, the first switching element sw1 is turned on (On). If the second signal C2 is also enabled, that is, C2=1, the first switching element sw1 is adapted to the first signal C1 and the second signal C2. The generated second switch control signal K2 is also enabled, that is, K2=1. On the other hand, if the second signal C2 is disabled, that is, C2=0, the second switch control signal K2 generated by the first switching element sw1 is disabled, that is, K2=0. Of course, if the first signal C1 is in the disabled state, that is, when C1=0, since the first switching element sw1 is in the off state, the first switching element is enabled or disabled regardless of the second signal C2. The second switch control signal K2 generated by sw1 is disabled, that is, K2=0.

The n-1th switching element swn-1 is electrically connected to the n-2th switching element swn-2 and the printing device 3 to receive the n-1th switching control signal Kn outputted by the n-2th switching element swn-2. -1 and the nth signal Cn outputted by the printing device 3, and the nth switch control signal Kn is generated in response to the n-1th switch control signal Kn-1 and the nth signal Cn. When the n-1th switch control signal Kn-1 is in an enabled state, that is, Kn-1=1, the n-1th switching element swn-1 is turned on. At this time, if the nth signal Cn is also enabled, that is, Cn= 1. The nth switching element swn-1 is also enabled in response to the n-1th switching control signal Kn-1 and the nth signal Cn, that is, Kn=1; When the n signal Cn is in the disabled state, that is, Cn=0, the nth switching control signal Kn generated by the n-1th switching element swn-1 is also disabled, that is, Kn=0. On the other hand, if the n-1th switch control signal Kn-1 is disabled, that is, when Kn-1=0, since the n-1th switch element swn-1 is in the off state, the nth signal Cn is enabled. Or disabled state, the nth of the n-1th switching element swn-1 The switch control signal Kn is disabled, that is, Kn=0.

The nth switching element swn is electrically connected to the n-1th switching element swn-1 and the inkjet heating element 21 to receive the nth switching control signal Kn outputted by the n-1th switching element swn-1. When the nth switch control signal Kn is in an enabled state, that is, Kn=1, the nth switching element swn is turned on. At this time, if the energy signal P is also in an enabled state, that is, P=1, the inkjet heating element 21 can be heated. And generating a bubble to push the ink to generate an ink droplet to perform an ink ejection operation; if the energy signal P is in an inactive state, that is, P=0, the inkjet heating element 21 does not perform the action of heating the inkjet, and if the nth When the switch control signal Kn is in the disabled state, that is, when Kn=0, since the nth switching element swn is in the off state, the ink jet heating element 21 does not perform the ink jet heating operation.

Please refer to FIG. 4, which is a block diagram of a circuit of an inkjet wafer according to another embodiment of the present invention. As shown in FIG. 4, the inkjet control circuit 22 of the present invention may include a plurality of pull-down resistors RD electrically connected to the first switching element sw1 to the n-1th switching element swn-1 and grounded to accelerate the response of the signal. Speed and protect the signal against interference, which in turn increases the stability of the circuit. In addition, in some embodiments, the inkjet chip 2 of the present invention may further include a signal connection electrically connected to any one of the first signal C1, the second signal C2 to the nth signal Cn, and a ground pull-down resistor, but Not limited to this.

The following is an exemplary embodiment of the n-1 level control circuit, and n=3, that is, the inkjet control circuit of the present invention is an embodiment of a two-level control circuit. In this embodiment, the output of the printing device 3 is The first signal, the second signal and the third signal are the control signal Q, the selection signal S and the address signal A, respectively, but are not limited thereto. Please refer to FIG. 5 and cooperate with FIG. 2, wherein FIG. 5 is a block diagram of the inkjet chip circuit when the inkjet control circuit of the present invention is a two-layer circuit. As shown in FIGS. 2 and 5, the inkjet control circuit 22 of the present invention includes at least a first switching element 221, a second switching element 222, and The third switching element 223, and the first switching element 221, the second switching element 222, and the third switching element 223 may be, but are not limited to, an N-type metal oxide half field effect transistor. The first switching element 221 is electrically connected to the printing device 3 to receive the control signal Q and the selection signal S output by the printing device 3, and generates a second switching control signal T according to the control signal Q and the selection signal S. When the control signal Q is in an enable state, that is, Q=1, the first switching element 221 is turned on (On), and if the selection signal S is also in an enabled state, that is, S=1, the first switching element 221 The second switch control signal T generated in response to the control signal Q and the selection signal S is also enabled, that is, T=1. On the other hand, if the selection signal S is disabled, that is, S=0, the second switching control signal T generated by the first switching element 221 is disabled, that is, T=0. Of course, if the control signal Q is in the disabled state, that is, when Q=0, since the first switching element 221 is in the off state, the first switching element 221 is generated regardless of whether the selection signal S is in an enabled state or a disabled state. The second switch control signal T is disabled, that is, T=0.

The second switching element 222 is electrically connected to the first switching element 221 and the printing device 3 to receive the second switching control signal T output by the first switching element 221 and the address signal A output by the printing device 3, and The second switch control signal T and the address signal A generate a third switch control signal H. When the second switch control signal T is in an enabled state, that is, T=1, the second switching element 222 is turned on. At this time, if the address signal A is also in an enabled state, that is, A=1, the second switching element 222 responds to the first The second switch control signal H generated by the second switch control signal T and the address signal A is also enabled, that is, H=1; if the address signal A is disabled, that is, A=0, the second switching element The third switch control signal H generated by 222 is also disabled, that is, H=0. On the other hand, if the second switch control signal T is in the disabled state, that is, T=0, since the second switching element 222 is in the off state, the second switching element 222 is the enabled state or the disabled state regardless of the address signal A. Produced by The three switch control signals H are all disabled, that is, H=0.

The third switching element 223 is electrically connected to the second switching element 222, the printing device 3, and the inkjet heating element 21 to receive the third switching control signal H output by the second switching element 222 and the energy output by the printing device 3. Signal P, when the third switch control signal H is in an enabled state, that is, H=1, the third switching element 223 is turned on. At this time, if the energy signal P is also in an enabled state, that is, P=1, the inkjet heating can be performed. The element 21 is heated and generates bubbles to push the ink to generate ink droplets for performing an ink ejection operation; if the energy signal P is in an inactive state, that is, P=0, the inkjet heating element 21 does not perform the action of heating the inkjet, and If the third switch control signal H is in the disabled state, that is, when H=0, since the third switching element 223 is in the off state, the inkjet heating element 21 does not perform the inkjet heating operation.

According to the concept of the present invention, the inkjet control circuit 22 of the present embodiment includes a first level control circuit composed of a control signal Q, a selection signal S and a first switching element 221, and a second switch control signal T, an address signal. The second level control circuit composed of A and the second switching element 222 outputs the third switching control signal H and cooperates with the energy signal P to activate the inkjet heating element 21, but is not limited thereto.

Please refer to FIG. 6, which is a block diagram of an inkjet chip circuit of a two-layer circuit of another embodiment of the present invention. As shown in FIG. 6, the inkjet control circuit 22 of the present invention may include a plurality of pull-down resistors 224 electrically connected to the first switching component 221 and the second switching component 222 and grounded to accelerate the response speed of the signal and protect the signal. Resist interference, which in turn increases the stability of the circuit.

Please refer to FIG. 7 , which is a circuit diagram of connecting the pull-down resistors in the inkjet wafer for each signal contact generated by the printing device of the present invention. As shown in Figure 7, the inkjet crystal of this case The chip 2 may include a plurality of pull-down resistors 23 electrically connected to the signal contacts of the control signal Q, the selection signal S and the address signal A, and grounded to speed up the reaction speed of the signal and protect the signal against interference, thereby increasing the circuit. Stability.

Please refer to FIG. 8 and FIG. 9 in conjunction with FIG. 5 , wherein FIG. 8 and FIG. 9 are respectively a signal-time map and a bit of the ink jet control circuit of the ink jet control circuit according to another embodiment of the present invention. The signal-time map of the address signal when it is inked in the forward direction. As shown in FIG. 5, FIG. 8 and FIG. 9, the inkjet wafer 2 of the present invention includes a plurality of first switching elements 221, a plurality of second switching elements 222, and a plurality of third switching elements 223, and is printed. The signal output by the device 3 includes a first control signal Q1, a second control signal Q2, a third control signal Q3, a first selection signal S1, a second selection signal S2, a first address signal A1, and a second address signal A2. The third address signal A3, the fourth address signal A4, the fifth address signal A5, and the first energy signal to the twentieth energy signal P1~P20. The first control signal Q1, the second control signal Q2, the third control signal Q3, the first selection signal S1, and the second selection signal S2 are matched with each other to control the turning on or off of the plurality of first switching elements 221, for example, Six first switching elements 221, but not limited thereto, and matched with the first address signal A1, the second address signal A2, the third address signal A3, the fourth address signal A4, and the fifth address signal A5, and controlling the turning on or off of the plurality of second switching elements 222, such as but not limited to thirty second switching elements 222, and then matching the first energy signal to the twentieth energy signals P1 to P20 to control the plurality of The three switching elements are turned on or off, for example, six hundred third switching elements 223, but not limited thereto, thereby controlling the inkjet heating operation of the plurality of inkjet heating elements 21 for a plurality of ink ejection points. It can be seen that the inkjet wafer 2 of the present invention and the printing device 3 to which it is applied can achieve the most control of the inkjet heating element 21 with the least control contact point, thereby reducing the cost and reducing the volume thereof, thereby achieving the reduction of the inkjet 匣. The effect of volume.

In this embodiment, the signal state of the first control signal to the third control signal Q1~Q3, the first selection signal to the second selection signal S1~S2, and the first address signal to the fifth address signal A1~A5 are For a fixed repetitive cycle, for example, at the first time T1, the first control signal Q1 is in an enabled state and the second control signal Q2 and the third control signal Q3 are disabled, that is, Q1=1, Q2=Q3=0. When the second time T2, the second control signal Q2 is in an enabled state, and the first control signal Q1 and the third control signal Q3 are disabled, that is, Q2=1, Q1=Q3=0; at the third time T3 When the third control signal Q3 is enabled, the first control signal Q1 and the second control signal Q2 are disabled, that is, Q3=1, Q1=Q2=0, and then at the fourth time T4 to the sixth time T6. The state of the first control signal to the third control signal Q1~Q3 is the same as that of the first time T1 to the third time T3, respectively, and the cycle is repeated repeatedly, but not limited thereto.

The first selection signal S1 and the second selection signal S2 are in a state cycle time of the first control signal to the third control signal Q1~Q3, and the first address signal to the fifth address signal A1~A5 Then, a state of the first selection signal S1 and the second selection signal S2 is cycled for its state maintaining time. For example, during the first time T1 to the third time T3, the first selection signal S1 is in an enabled state, and the second selection signal S2 is in an inactive state, that is, S1=1, S2=0, and at the fourth time. The first selection signal S1 is in the disabled state, and the second selection signal S2 is in the enabling state, that is, S1=0, S2=1, but not limited thereto. As for the first address signal to the fifth address signal A1~A5, as shown in FIG. 9, the first address signal A1 is enabled and the second time is from the first time T1 to the sixth time T6. The address signal to the fifth address signal A2~A5 are disabled, that is, A1=1, A2=A3=A4=A5=0, and the fixed repeating loop mode is the same as the foregoing, and thus will not be described herein.

According to the concept of the present case, the first energy signal outputted by the printing device 3 to the twentieth energy The signal signals P1~P20 are irregularly appearing signals, and are not limited thereto. The main signals are based on the printing data received by the printing device 3 to determine that the inkjet point needs to be ejected. The output is output so that the ink jet heating element 21 performs the printing operation of the ink jet heating.

Please refer to FIG. 10 and FIG. 11 together with FIG. 5 , which is a signal-time map of the inkjet control circuit in the reverse inkjet according to another embodiment of the present invention, and a bit address signal in the reverse inkjet. Signal-time map. As shown in FIG. 5, FIG. 10 and FIG. 11, the inkjet wafer 2 of the present invention includes a plurality of first switching elements 221, a plurality of second switching elements 222, and a plurality of third switching elements 223, and is printed. The signal output by the device includes a first control signal Q1, a second control signal Q2, a third control signal Q3, a first selection signal S1, a second selection signal S2, a first address signal A1, and a second address signal A2. The three-bit address signal A3, the fourth address signal A4, the fifth address signal A5, and the first energy signal to the twentieth energy signal P1~P20. In this embodiment, only the signal sequence of the first address signal to the fifth address signal A1~A5 is reversed, and the cycles and modes of operation of the other signals are the same as those described above, so no further details are provided herein.

In summary, the present invention provides an ink jet chip, wherein the first switching element to the nth switching element cooperate with the first signal of the printing device and the multi-level inkjet control circuit composed of the second signal to the nth signal. The inkjet heating element with the least control point can be controlled to reduce the cost and reduce the volume of the inkjet crucible.

The present invention has been described in detail by the above-described embodiments, and may be modified by those skilled in the art, without departing from the scope of the appended claims.

2‧‧‧Inkjet wafer

21‧‧‧Inkjet heating elements

22‧‧‧Inkjet Control Circuit

C1~Cn‧‧‧first signal~nth signal

Sw1‧‧‧First switching element

Sw2‧‧‧Second switching element

Swn-2‧‧‧n-2th switching element

Swn-1‧‧‧n-1th switching element

Swn‧‧‧nth switching element

K2‧‧‧Second switch control signal

Kn-1‧‧‧n-1 switch control signal

Kn‧‧‧n switch control signal

P‧‧‧Energy signal

Claims (9)

An inkjet chip receives at least one energy signal outputted by a printing device and at least a first signal, at least one second signal to at least one nth signal, wherein n is a natural number greater than or equal to 3, and the inkjet wafer comprises An inkjet heating element receiving the energy signal output by the printing device; and an inkjet control circuit comprising: a first switching element to an nth switching element, wherein: the first switching element is coupled to the printing device Electrically connecting to receive the first signal and the second signal output by the printing device, and generating a second switch control signal according to the first signal and the second signal; the n-1th switch component is The n-2th switching element and the printing device are electrically connected to receive an n-1th switching control signal of the output of the n-2th switching element and the nth signal output by the printing device, and The n-1th switch control signal and the nth signal generate an nth switch control signal; the nth switch element is electrically connected to the n-1th switch element and the inkjet heating element to receive the n-1th The nth switch control of the switching element output a signal; wherein the inkjet heating element receives the energy signal output by the printing device, and controls the nth switching element to be turned on according to the nth switching control signal to ground the inkjet heating element to generate a heating effect to spray ink. The inkjet wafer of claim 1, wherein the first switching element to the nth switching element are field effect transistors. An inkjet wafer according to claim 1, wherein the inkjet control circuit is further The plurality of pull-down resistors are electrically connected to the first switch element to the n-1th switch element and grounded. The inkjet chip of claim 1, wherein when n is equal to 3, the first signal is a control signal, the second signal is a selection signal, and the third signal is a bit. Address signal. The inkjet chip of claim 4, further comprising a pull-up resistor electrically connected to the signal contact of the control signal and grounded. The inkjet chip of claim 4, further comprising a pull-up resistor electrically connected to the signal contact of the selection signal and grounded. The inkjet chip of claim 4, further comprising a pull-up resistor electrically connected to the signal contact of the address signal and grounded. The inkjet chip of claim 1, further comprising a pull-up resistor electrically connected to the signal contact of the first signal, the second signal to the nth signal, and grounded. The inkjet wafer of claim 1, wherein the inkjet control circuit is a n-1 level control circuit.