CN107170409A - A kind of image element circuit and display panel - Google Patents
A kind of image element circuit and display panel Download PDFInfo
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- CN107170409A CN107170409A CN201710586380.5A CN201710586380A CN107170409A CN 107170409 A CN107170409 A CN 107170409A CN 201710586380 A CN201710586380 A CN 201710586380A CN 107170409 A CN107170409 A CN 107170409A
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
- G09G3/3225—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix
- G09G3/3233—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix with pixel circuitry controlling the current through the light-emitting element
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Abstract
The invention discloses a kind of image element circuit and display panel, the image element circuit includes：Drive module, bypass module and luminescent device；Wherein, drive module is used to input driving current to the input of luminescent device, and driving luminescent device lights；Bypass module is connected between the input of luminescent device and output end, and the driving current of luminescent device is input to for shunting drive module.So the standoff voltage of drive module can be set more a little bit smaller, allow drive module to export micro-current in dark-state to ensure the response time, improve response speed, improve hesitation；Simultaneously by connecting a bypass module between the input of luminescent device, output end, and then caused by the shunting action of bypass module smaller by the electric current of luminescent device, so as to ensure that the brightness of luminescent device under dark-state is dark enough, it is ensured that the dark-state display brightness of display panel.
Description
Technical Field
The invention relates to the technical field of display, in particular to a pixel circuit and a display panel.
Background
With the progress of Display technology, Organic Light Emitting Diode (OLED) is one of the hot spots in the current field of flat panel Display research, and more Active Matrix Organic Light Emitting Diode (AMOLED) Display panels enter the market, and compared with the conventional Thin Film Transistor Liquid Crystal Display (TFT LCD), the AMOLED has faster response speed, higher contrast ratio and wider viewing angle.
However, tests on the OLED display screen show that the response speed of the OLED display screen is poor when the OLED display screen jumps from a dark-state display picture to a bright-state display picture. This is because the off-state voltage of the driving transistor for driving the OLED to emit light in the off-state is large (to ensure the contrast of the display screen, the off-state voltage needs to be set large so that the driving transistor is in a completely off state), so when the display screen jumps from a dark state to a bright state, the driving transistor may have a transient threshold voltage drift, which causes a response speed to be poor and a hysteresis effect to occur.
Therefore, how to increase the response speed of the display panel to improve the hysteresis effect is an urgent technical problem to be solved by those skilled in the art.
Disclosure of Invention
The embodiment of the invention provides a pixel circuit and a display panel, which are used for improving the hysteresis effect of the display panel in the prior art.
An embodiment of the present invention provides a pixel circuit, including: the driving module, the bypass module and the light emitting device; wherein,
the driving module is used for inputting driving current to the input end of the light-emitting device and driving the light-emitting device to emit light;
the bypass module is connected between the input end and the output end of the light-emitting device and used for shunting the driving current input to the light-emitting device by the driving module.
In a possible implementation manner, in the pixel circuit provided by an embodiment of the present invention, the bypass module includes: a resistance;
the resistor is connected between the input end and the output end of the light-emitting device.
In a possible implementation manner, in the pixel circuit provided in an embodiment of the present invention, the driving module includes: the device comprises a reset unit, a write-in unit, a compensation unit, a driving unit, a control unit and a power input unit; wherein,
the first control end and the second control end of the reset unit are used for inputting a first control signal, the input end of the reset unit is used for inputting a reference signal, the first output end of the reset unit is connected with the first node, and the second output end of the reset unit is connected with the second node; the reset unit is used for outputting the reference signals to the first node and the second node respectively under the control of the first control signal;
the control end of the writing unit is used for inputting a second control signal, the input end of the writing unit is used for inputting a data signal, and the output end of the writing unit is connected with the third node; the writing unit is used for outputting the data signal to the third node under the control of the second control signal;
the control end of the compensation unit is used for inputting the second control signal, the first input end is used for inputting a power supply signal, the second input end is connected with the fourth node, and the output end is connected with the first node; the compensation unit is used for compensating the threshold voltage of the driving unit for the first node through the power supply signal under the control of the second control signal;
the control end of the driving unit is connected with the first node, the input end of the driving unit is connected with the third node, and the output end of the driving unit is connected with the fourth node; the driving unit is used for conducting the third node and the fourth node under the control of the first node;
the control end of the control unit is used for inputting a third control signal, the input end of the control unit is connected with the fourth node, and the output end of the control unit is connected with the input end of the light-emitting device; the control unit is used for conducting the fourth node and the input end of the light-emitting device under the control of the third control signal;
the control end of the power input unit is used for inputting the third control signal, the input end of the power input unit is used for inputting the power signal, and the output end of the power input unit is connected with the third node; the power input unit is configured to output the power signal to the third node under control of the third control signal.
In a possible implementation manner, in the pixel circuit provided by an embodiment of the present invention, the power input unit includes: a first switching transistor;
the gate of the first switching transistor is used for inputting the third control signal, the source of the first switching transistor is used for inputting the power supply signal, and the drain of the first switching transistor is connected with the third node.
In a possible implementation manner, in the pixel circuit provided by an embodiment of the present invention, the writing unit includes: a second switching transistor;
and the grid electrode of the second switch transistor is used for inputting the second control signal, the source electrode of the second switch transistor is used for inputting the data signal, and the drain electrode of the second switch transistor is connected with the third node.
In a possible implementation manner, in the pixel circuit provided by the embodiment of the present invention, the driving unit includes: a third switching transistor;
and the grid electrode of the third switching transistor is connected with the first node, the source electrode of the third switching transistor is connected with the third node, and the drain electrode of the third switching transistor is connected with the fourth node.
In a possible implementation manner, in the pixel circuit provided by an embodiment of the present invention, the compensation unit includes: a fourth switching transistor and a capacitor; wherein,
the grid electrode of the fourth switching transistor is used for inputting the second control signal, the source electrode of the fourth switching transistor is connected with the fourth node, and the drain electrode of the fourth switching transistor is connected with the first node;
one end of the capacitor is used for inputting the power supply signal, and the other end of the capacitor is connected with the first node.
In a possible implementation manner, in the pixel circuit provided by an embodiment of the present invention, the reset unit includes: a fifth switching transistor and a sixth switching transistor; wherein,
the grid electrode of the fifth switching transistor is used for inputting the first control signal, the source electrode of the fifth switching transistor is used for inputting the reference signal, and the drain electrode of the fifth switching transistor is connected with the first node;
and the sixth switching transistor has a gate for inputting the first control signal, a source for inputting the reference signal, and a drain connected to the second node.
In a possible implementation manner, in the pixel circuit provided in an embodiment of the present invention, the control unit includes: a seventh switching transistor;
and the seventh switching transistor has a gate for inputting the third control signal, a source connected to the fourth node, and a drain connected to the input terminal of the light emitting device.
In a possible implementation manner, in the pixel circuit provided in an embodiment of the present invention, the driving module includes: a first subunit and a second subunit; wherein,
the control end of the first subunit is used for inputting scanning signals, the input end of the first subunit is used for inputting data signals, and the output end of the first subunit is connected with the control node; the first subunit is configured to output the data signal to the control node under control of the scan signal;
the control end of the second subunit is connected with the control node, the input end of the second subunit is used for inputting a power supply signal, and the output end of the second subunit is connected with the input end of the light-emitting device; the second subunit is configured to drive the light emitting device to emit light through the power signal under the control of the control node.
In a possible implementation manner, in the pixel circuit provided by an embodiment of the present invention, the first sub-unit includes: an eighth switching transistor;
and the eighth switching transistor has a gate for inputting the scanning signal, a source for inputting the data signal, and a drain connected to the control node.
In a possible implementation manner, in the pixel circuit provided by an embodiment of the present invention, the second sub-unit includes: a ninth switching transistor and a storage capacitor;
the ninth switching transistor has a gate connected to the control node, a source for inputting the power signal, and a drain connected to the input terminal of the light emitting device;
one end of the storage capacitor is used for inputting the power supply signal, and the other end of the storage capacitor is connected with the control node.
The embodiment of the invention provides a display panel, which comprises the pixel circuit provided by the embodiment of the invention.
The embodiment of the invention has the beneficial effects that:
the embodiment of the invention provides a pixel circuit and a display panel, wherein the pixel circuit comprises: the driving module, the bypass module and the light emitting device; the driving module is used for inputting driving current to the input end of the light-emitting device and driving the light-emitting device to emit light; the bypass module is connected between the input end and the output end of the light-emitting device and used for shunting the driving current input to the light-emitting device by the driving module. Therefore, the off-state voltage of the driving module can be set to be smaller, so that the driving module can output a trace current in a dark state to guarantee the response time, improve the response speed and improve the hysteresis effect; meanwhile, a bypass module is connected between the input end and the output end of the light-emitting device, and then the current passing through the light-emitting device is smaller through the shunting action of the bypass module, so that the brightness of the light-emitting device in a dark state is ensured to be dark enough, and the dark-state display brightness of the display panel is ensured.
Drawings
Fig. 1 is a schematic structural diagram of a pixel circuit according to an embodiment of the present invention;
fig. 2 is a graph illustrating the operating characteristics of a driving transistor according to an embodiment of the present invention;
fig. 3a and fig. 3b are respectively a specific structural schematic diagram of a pixel circuit according to an embodiment of the present invention.
Detailed Description
The following describes in detail specific embodiments of a pixel circuit and a display panel according to an embodiment of the present invention with reference to the drawings.
An embodiment of the present invention provides a pixel circuit, as shown in fig. 1, including: the driving module 01, the bypass module 02 and the light emitting device OLED; the driving module 01 is used for inputting a driving current to an input end of the light emitting device OLED and driving the light emitting device OLED to emit light; the bypass module 02 is connected between the input end and the output end of the light emitting device OLED, and is used for shunting the driving current input to the light emitting device OLED by the driving module 01, and the output end of the light emitting device is connected to the ground power signal ELVSS.
Specifically, the response time test is performed on the display panel, and the display panel is set to display a black picture for a certain period of time (for example, one minute) and then switched to a white picture. Taking the driving transistor as a P-type transistor as an example, in the black-screen display time of one minute, the gate voltage of the driving transistor for driving the pixel in the pixel circuit to emit light is positive, and the driving transistor is in an off state. As shown in fig. 2, wherein Gate1 is a transistor characteristic curve with no Gate bias voltage, and Gate2 and Gate3 are transistor characteristic curves with Gate voltage lower than normal off-state voltage, respectively; as can be seen from fig. 2, the gate voltage of the black frame 1 is higher than that of the black frame 2, the leakage current is higher, and the brightness is also higher; the hysteresis of switching the display panel from black frame 1 to white frame is more severe than the switching of the display panel from black frame 2 to white frame, which means that the first frame of frame cannot return to the normal white frame in time. Therefore, in order to improve the response speed of the display panel, the gate voltage of the driving transistor needs to be reduced when the display panel displays a black picture, that is, in the pixel circuit provided in the embodiment of the present invention, the off-state voltage of the driving module is set to be smaller, so that the driving module can output a small amount of current in the off-state to ensure the response time, improve the response speed, and improve the hysteresis effect; meanwhile, a bypass module is connected between the input end and the output end of the light-emitting device, and then the current passing through the light-emitting device is smaller through the shunting action of the bypass module, so that the brightness of the light-emitting device in a dark state is ensured to be dark enough, and the dark-state display brightness of the display panel is ensured.
In practical implementation, in the pixel circuit provided in the embodiment of the present invention, as shown in fig. 3a and 3b, the bypass module 02 may include: a resistance R; the resistor R is connected between the input terminal and the output terminal of the light emitting device OLED. Specifically, the bypass module can shunt the driving current output by the driving module through the resistor, so that the response time of the display panel can be guaranteed, the hysteresis effect can be improved, and the influence of the driving current output by the driving module on the dark state display brightness of the display panel in the dark state can be avoided.
In a specific implementation, in the pixel circuit provided in the embodiment of the present invention, as shown in fig. 3a, the driving module 01 includes: a reset unit 011, a write unit 012, a compensation unit 013, a drive unit 014, a control unit 015, and a power input unit 016; wherein,
the reset unit 011 has a first control terminal and a second control terminal for inputting a first control signal S1, an input terminal for inputting a reference signal Vref, a first output terminal connected to a first node P1, and a second output terminal connected to a second node P2; the reset unit 011 is configured to output a reference signal Vref to a first node P1 and a second node P2, respectively, under the control of a first control signal S1;
the control end of the write unit 012 is used to input the second control signal S2, the input end is used to input the data signal Vdata, and the output end is connected to the third node P3; the write unit 012 is configured to output the data signal Vdata to the third node P3 under the control of the second control signal S2;
the compensation unit 013 has a control terminal for inputting the second control signal S2, a first input terminal for inputting the power supply signal ELVDD, a second input terminal connected to the fourth node P4, and an output terminal connected to the first node P1; the compensation unit 013 is used to compensate the threshold voltage of the driving unit 014 for the first node P1 by the power supply signal ELVDD under the control of the second control signal S2;
the control terminal of the driving unit 014 is connected to the first node P1, the input terminal is connected to the third node P3, and the output terminal is connected to the fourth node P4; the driving unit 014 for turning on the third node P3 and the fourth node P4 under the control of the first node P1;
a control terminal of the control unit 015 is configured to input a third control signal EM, an input terminal of the control unit is connected to the fourth node P4, and an output terminal of the control unit is connected to an input terminal of the light emitting device OLED; the control unit 015 is configured to turn on the fourth node P4 and the input terminal of the light emitting device OLED under the control of the third control signal EM;
the control terminal of the power input unit 016 is used for inputting the third control signal EM, the input terminal is used for inputting the power signal ELVDD, and the output terminal is connected to the third node P3; the power input unit 016 is used to output the power signal ELVDD to the third node P3 under the control of the third control signal EM.
Specifically, in the pixel circuit provided in the embodiment of the present invention, the driving module outputs the driving current to drive the light emitting device to emit light through the reset unit, the write unit, the compensation unit, the driving unit, the control unit, and the power input unit.
In a specific implementation, in the pixel circuit provided in the embodiment of the present invention, as shown in fig. 3a, the power input unit 016 may include: a first switching transistor T1; the first switching transistor T1 has a gate for inputting the third control signal EM, a source for inputting the power supply signal ELVDD, and a drain connected to the third node P3. Specifically, the first switching transistor may be turned on under the control of the third control signal, and the turned-on first switching transistor may output the power supply signal to the third node.
In a specific implementation, in the pixel circuit provided in an embodiment of the present invention, as shown in fig. 3a, the writing unit 012 may include: a second switching transistor T2; the second switching transistor T2 has a gate for inputting the second control signal S2, a source for inputting the data signal Vdata, and a drain connected to the third node P3. Specifically, the second switching transistor may be turned on under the control of the second control signal, and the turned-on second switching transistor may output the data signal to the third node.
In a specific implementation, in the pixel circuit provided in the embodiment of the present invention, as shown in fig. 3a, the driving unit 014 may include: a third switching transistor T3; the third switching transistor T3 has a gate connected to the first node P1, a source connected to the third node P3, and a drain connected to the fourth node P4. Specifically, the third switching transistor may be turned on under the control of the first node, and the turned-on third switching transistor may turn on the third node and the fourth node.
In practical implementation, in the pixel circuit provided in the embodiment of the present invention, as shown in fig. 3a, the compensation unit 013 includes: a fourth switching transistor T4 and a capacitor C; the fourth switching transistor T4 has a gate for inputting the second control signal S2, a source connected to the fourth node P4, and a drain connected to the first node P1; the capacitor C has one terminal for inputting the power supply signal ELVDD and the other terminal connected to the first node P1. Specifically, the fourth switching transistor may be turned on under the control of the second control signal, and the turned-on fourth switching transistor may turn on the first node and the fourth node.
In a specific implementation, in the pixel circuit provided in the embodiment of the present invention, as shown in fig. 3a, the reset unit 011 may include: a fifth switching transistor T5 and a sixth switching transistor T6; the gate of the fifth switching transistor T5 is used for inputting the first control signal S1, the source is used for inputting the reference signal Vref, and the drain is connected to the first node P1; the sixth switching transistor T6 has a gate for inputting the first control signal S1, a source for inputting the reference signal Vref, and a drain connected to the second node P2. Specifically, the fifth switching transistor may be turned on under the control of the first control signal, and the turned-on fifth switching transistor may output the reference signal to the first node; the sixth switching transistor may be turned on under the control of the first control signal, and the turned-on sixth switching transistor may output the reference signal to the second node.
In a specific implementation, in the pixel circuit provided in the embodiment of the present invention, as shown in fig. 3a, the control unit 015 may include: a seventh switching transistor T7; the seventh switching transistor T7 has a gate for inputting the third control signal EM, a source connected to the fourth node P4, and a drain connected to the input terminal of the light emitting device OLED. Specifically, the seventh switching transistor may be turned on under the control of the third control signal, and the turned-on seventh switching transistor may turn on the fourth node and the second node, i.e., the input terminal of the light emitting device.
In a specific implementation, in the pixel circuit provided in the embodiment of the present invention, as shown in fig. 3b, the driving module 01 may include: a first subunit 017 and a second subunit 018; wherein,
a control end of the first subunit 017 is used for inputting a scanning signal Gate, an input end is used for inputting a data signal Vdata, and an output end is connected with a control node PU; the first subunit 017 is configured to output the data signal Vdata to the control node PU under the control of the scan signal Gate;
a control terminal of the second subunit 018 is connected to the control node PU, an input terminal is used for inputting the power supply signal ELVDD, and an output terminal is connected to an input terminal of the light emitting device OLED; the second sub-unit 018 is used to drive the light emitting device OLED to emit light by the power supply signal ELVDD under the control of the control node PU.
Specifically, in the pixel circuit provided by the embodiment of the present invention, the driving module can output the driving current through the first sub-unit and the second sub-unit to drive the light emitting device to emit light.
In specific implementation, in the pixel circuit provided in the embodiment of the present invention, as shown in fig. 3b, the first subunit 017 may include: an eighth switching transistor T8; the eighth switching transistor T8 has a Gate for inputting the scan signal Gate, a source for inputting the data signal Vdata, and a drain connected to the control node PU. Specifically, the eighth switching transistor may be turned on under the control of the scan signal, and the turned-on eighth switching transistor may output the data signal to the control node.
In specific implementation, in the pixel circuit provided in the embodiment of the present invention, as shown in fig. 3b, the second sub-unit 018 may include: a ninth switching transistor T9 and a storage capacitor C; a ninth switching transistor T9 has a gate connected to the control node PU, a source for inputting the power signal ELVDD, and a drain connected to the input terminal of the light emitting device OLED; one end of the storage capacitor C is used for inputting an ELVDD power signal, and the other end is connected to the control node PU. Specifically, the ninth switching transistor may be turned on under the control of the control node, and the turned-on ninth switching transistor may output a power signal to an input terminal of the light emitting device; the output end of the light-emitting device is connected with a ground power signal ELVSS.
It should be noted that the switching Transistor mentioned in the above embodiments of the present invention may be a Thin Film Transistor (TFT) or a Metal oxide semiconductor field effect Transistor (MOS), and is not limited herein. In specific implementations, the sources and drains of these transistors may be interchanged without specific distinction. A thin film transistor will be described as an example in describing specific embodiments. In addition, the pixel circuit structure shown in fig. 3a and 3b, the operation timing of outputting the driving current to drive the light emitting device to emit light is the same as that of the prior art, and will not be described in detail here. The concept of the invention can also be applied to other pixel point circuit structures, and only a bypass module is added on the basis of the original pixel structure, so that the off-state voltage of the driving transistor is set to be smaller, and the driving module can output micro current in a dark state to guarantee the response time, improve the response speed and improve the hysteresis effect; meanwhile, a bypass module is connected between the input end and the output end of the light-emitting device, and then the current passing through the light-emitting device is smaller through the shunting action of the bypass module, so that the brightness of the light-emitting device in a dark state is ensured to be dark enough, and the dark-state display brightness of the display panel is ensured.
Based on the same inventive concept, embodiments of the present invention provide a display panel including the pixel circuit provided in embodiments of the present invention. The display panel can be applied to any product or component with a display function, such as a mobile phone, a tablet personal computer, a television, a display, a notebook computer, a digital photo frame, a navigator and the like. Since the principle of the display panel to solve the problem is similar to that of the pixel circuit, the implementation of the display panel can refer to the implementation of the pixel circuit, and repeated descriptions are omitted.
The embodiment of the invention provides a pixel circuit and a display panel, wherein the pixel circuit comprises: the driving module, the bypass module and the light emitting device; the driving module is used for inputting driving current to the input end of the light-emitting device and driving the light-emitting device to emit light; the bypass module is connected between the input end and the output end of the light-emitting device and used for shunting the driving current input to the light-emitting device by the driving module. Therefore, the off-state voltage of the driving module can be set to be smaller, so that the driving module can output a trace current in a dark state to guarantee the response time, improve the response speed and improve the hysteresis effect; meanwhile, a bypass module is connected between the input end and the output end of the light-emitting device, and then the current passing through the light-emitting device is smaller through the shunting action of the bypass module, so that the brightness of the light-emitting device in a dark state is ensured to be dark enough, and the dark-state display brightness of the display panel is ensured.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (13)
1. A pixel circuit, comprising: the driving module, the bypass module and the light emitting device; wherein,
the driving module is used for inputting driving current to the input end of the light-emitting device and driving the light-emitting device to emit light;
the bypass module is connected between the input end and the output end of the light-emitting device and used for shunting the driving current input to the light-emitting device by the driving module.
2. The pixel circuit of claim 1, wherein the bypass module comprises: a resistance;
the resistor is connected between the input end and the output end of the light-emitting device.
3. The pixel circuit according to claim 1 or 2, wherein the driving module comprises: the device comprises a reset unit, a write-in unit, a compensation unit, a driving unit, a control unit and a power input unit; wherein,
the first control end and the second control end of the reset unit are used for inputting a first control signal, the input end of the reset unit is used for inputting a reference signal, the first output end of the reset unit is connected with the first node, and the second output end of the reset unit is connected with the second node; the reset unit is used for outputting the reference signals to the first node and the second node respectively under the control of the first control signal;
the control end of the writing unit is used for inputting a second control signal, the input end of the writing unit is used for inputting a data signal, and the output end of the writing unit is connected with the third node; the writing unit is used for outputting the data signal to the third node under the control of the second control signal;
the control end of the compensation unit is used for inputting the second control signal, the first input end is used for inputting a power supply signal, the second input end is connected with the fourth node, and the output end is connected with the first node; the compensation unit is used for compensating the threshold voltage of the driving unit for the first node through the power supply signal under the control of the second control signal;
the control end of the driving unit is connected with the first node, the input end of the driving unit is connected with the third node, and the output end of the driving unit is connected with the fourth node; the driving unit is used for conducting the third node and the fourth node under the control of the first node;
the control end of the control unit is used for inputting a third control signal, the input end of the control unit is connected with the fourth node, and the output end of the control unit is connected with the input end of the light-emitting device; the control unit is used for conducting the fourth node and the input end of the light-emitting device under the control of the third control signal;
the control end of the power input unit is used for inputting the third control signal, the input end of the power input unit is used for inputting the power signal, and the output end of the power input unit is connected with the third node; the power input unit is configured to output the power signal to the third node under control of the third control signal.
4. The pixel circuit according to claim 3, wherein the power supply input unit includes: a first switching transistor;
the gate of the first switching transistor is used for inputting the third control signal, the source of the first switching transistor is used for inputting the power supply signal, and the drain of the first switching transistor is connected with the third node.
5. The pixel circuit according to claim 3, wherein the writing unit includes: a second switching transistor;
and the grid electrode of the second switch transistor is used for inputting the second control signal, the source electrode of the second switch transistor is used for inputting the data signal, and the drain electrode of the second switch transistor is connected with the third node.
6. The pixel circuit according to claim 3, wherein the driving unit includes: a third switching transistor;
and the grid electrode of the third switching transistor is connected with the first node, the source electrode of the third switching transistor is connected with the third node, and the drain electrode of the third switching transistor is connected with the fourth node.
7. The pixel circuit according to claim 3, wherein the compensation unit includes: a fourth switching transistor and a capacitor; wherein,
the grid electrode of the fourth switching transistor is used for inputting the second control signal, the source electrode of the fourth switching transistor is connected with the fourth node, and the drain electrode of the fourth switching transistor is connected with the first node;
one end of the capacitor is used for inputting the power supply signal, and the other end of the capacitor is connected with the first node.
8. The pixel circuit according to claim 3, wherein the reset unit includes: a fifth switching transistor and a sixth switching transistor; wherein,
the grid electrode of the fifth switching transistor is used for inputting the first control signal, the source electrode of the fifth switching transistor is used for inputting the reference signal, and the drain electrode of the fifth switching transistor is connected with the first node;
and the sixth switching transistor has a gate for inputting the first control signal, a source for inputting the reference signal, and a drain connected to the second node.
9. The pixel circuit according to claim 3, wherein the control unit includes: a seventh switching transistor;
and the seventh switching transistor has a gate for inputting the third control signal, a source connected to the fourth node, and a drain connected to the input terminal of the light emitting device.
10. The pixel circuit according to claim 1 or 2, wherein the driving module comprises: a first subunit and a second subunit; wherein,
the control end of the first subunit is used for inputting scanning signals, the input end of the first subunit is used for inputting data signals, and the output end of the first subunit is connected with the control node; the first subunit is configured to output the data signal to the control node under control of the scan signal;
the control end of the second subunit is connected with the control node, the input end of the second subunit is used for inputting a power supply signal, and the output end of the second subunit is connected with the input end of the light-emitting device; the second subunit is configured to drive the light emitting device to emit light through the power signal under the control of the control node.
11. The pixel circuit of claim 10, wherein the first sub-unit comprises: an eighth switching transistor;
and the eighth switching transistor has a gate for inputting the scanning signal, a source for inputting the data signal, and a drain connected to the control node.
12. The pixel circuit of claim 10, wherein the second sub-unit comprises: a ninth switching transistor and a storage capacitor;
the ninth switching transistor has a gate connected to the control node, a source for inputting the power signal, and a drain connected to the input terminal of the light emitting device;
one end of the storage capacitor is used for inputting the power supply signal, and the other end of the storage capacitor is connected with the control node.
13. A display panel comprising the pixel circuit according to any one of claims 1 to 12.
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| CN201710586380.5A CN107170409A (en) | 2017-07-18 | 2017-07-18 | A kind of image element circuit and display panel |
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| CN201710586380.5A CN107170409A (en) | 2017-07-18 | 2017-07-18 | A kind of image element circuit and display panel |
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| CN201710586380.5A Pending CN107170409A (en) | 2017-07-18 | 2017-07-18 | A kind of image element circuit and display panel |
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