CN111785213A - Pixel driving circuit and method and display panel - Google Patents
Pixel driving circuit and method and display panel Download PDFInfo
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- CN111785213A CN111785213A CN202010783056.4A CN202010783056A CN111785213A CN 111785213 A CN111785213 A CN 111785213A CN 202010783056 A CN202010783056 A CN 202010783056A CN 111785213 A CN111785213 A CN 111785213A
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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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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0233—Improving the luminance or brightness uniformity across the screen
Abstract
The invention provides a pixel driving circuit and method and a display panel, belongs to the technical field of display, and can at least partially solve the problem that the brightness uniformity of a light-emitting device is poor due to different driving currents generated by different threshold voltages of driving transistors in the conventional pixel driving circuit. The invention discloses a pixel driving circuit, which comprises a driving unit, a light-emitting unit, a storage unit, a resetting unit, a light-emitting control unit and a writing compensation unit, wherein the driving unit is used for driving the light-emitting unit to emit light; the first end of the storage unit is connected with the first node, and the second end of the storage unit is connected with the second node; the reset unit is used for adjusting the voltages of the first node and the third node according to the first voltage end and the grounding end; the writing compensation unit is used for writing the data signal and the compensation data of the data line end into the driving unit through the adjustment of the storage unit; and the light-emitting control unit is used for writing display current into the light-emitting unit through matching with the driving unit, and the magnitude of the display current is related to the data signal and the voltage of the second voltage end.
Description
Technical Field
The invention belongs to the technical field of display, and particularly relates to a pixel driving circuit and method and a display panel.
Background
Active Matrix Organic Light Emitting Diode (AMOLED) is becoming more and more widely used. The pixel display device of the AMOLED is an Organic Light-Emitting Diode (OLED), and the AMOLED can emit Light and generate a driving current in a saturated state through the driving thin film transistor, and the driving current drives the Light-Emitting device to emit Light. As shown in fig. 1, a conventional basic pixel driving circuit employs a 2T1C circuit, and the 2T1C circuit includes two thin film transistors (a switching transistor T0 and a driving transistor DT) and 1 storage capacitor C.
However, in the conventional low temperature polysilicon process, the uniformity of the threshold voltage Vth between the driving transistors on the display substrate is poor, so that when the same data voltage is input to the driving transistors, different driving currents are generated due to different threshold voltages of the driving transistors, and the uniformity of the brightness of the light emitting device is poor.
Disclosure of Invention
The invention at least partially solves the problem of poor brightness uniformity of the light-emitting device caused by different driving currents generated by different threshold voltages of the driving transistors in the existing pixel driving circuit, and provides the pixel driving circuit which can effectively eliminate the influence of the threshold voltages of the driving transistors on the driving currents of the light-emitting device.
The technical scheme adopted for solving the technical problem is that the pixel driving circuit comprises a driving unit, a light-emitting unit, a storage unit, a reset unit, a light-emitting control unit and a write compensation unit; the driving unit is used for driving the light-emitting unit to emit light; the first end of the storage unit is connected with the first node, and the second end of the storage unit is connected with the second node; the reset unit is used for adjusting the voltages of the first node and the third node according to a first voltage end and a grounding end; the writing compensation unit is used for writing the data signal and the compensation data of a data line end into the driving unit through the adjustment of the storage unit; and the light-emitting control unit is used for writing display current into the light-emitting unit through matching with the driving unit, and the magnitude of the display current is related to the data signal and the voltage of the second voltage end.
Further preferably, the write compensation unit includes: a first transistor, wherein a grid electrode of the first transistor is connected with a grid line end, a first pole of the first transistor is connected with a data line end, and a second pole of the first transistor is connected with a first node; and a gate of the second transistor is connected with the first node, a first pole of the second transistor is connected with the data line end, and a second pole of the second transistor is connected with the first node.
Further preferably, the driving unit includes: a third transistor, wherein the grid electrode of the third transistor is connected with the first node, the first pole of the third transistor is connected with the second voltage end, and the second pole of the third transistor is connected with the second node; a fourth transistor, a gate of which is connected to the first node, a first pole of which is connected to the third node, a second pole of which is connected to the first end of the light emitting unit, and a second end of the light emitting unit is connected to a ground terminal; and a gate of the fifth transistor is connected with the first node, a first pole of the fifth transistor is connected with the first node, and a second pole of the fifth transistor is connected with the first voltage end.
Further preferably, the light emission control unit includes: and the grid electrode of the sixth transistor is connected with the signal end, the first pole of the sixth transistor is connected with the second node, and the second pole of the sixth transistor is connected with the third node.
Further preferably, the reset unit includes: a seventh transistor, a gate of which is connected to the reset terminal, a first pole of which is connected to the first node, and a second pole of which is connected to the first voltage terminal; and the grid electrode of the eighth transistor is connected with the reset end, the first electrode of the eighth transistor is connected with the third node, and the second electrode of the eighth transistor is connected with the first end of the light-emitting unit.
Further preferably, the storage unit includes: and a storage capacitor having a first pole connected to the first node and a second pole connected to the second node.
It is further preferred that all transistors are N-type transistors; alternatively, all transistors are P-type transistors.
The technical solution to solve the technical problem of the present invention is a pixel driving method based on the pixel driving circuit, including: in a reset phase, the reset unit is used for adjusting the voltages of the first node and the third node according to a first voltage end and a grounding end; in a data writing phase, the writing compensation unit is used for writing a data signal and compensation data of a data line end into the driving unit through the adjustment of the storage unit; in a display phase, the light-emitting control unit is used for writing a display current into the light-emitting unit through matching with the driving unit, and the magnitude of the display current is related to the data signal and the voltage of the second voltage end.
Further preferably, the pixel driving method specifically includes: a reset stage, inputting a reset signal to the first voltage end, inputting a conducting signal to the reset end, and inputting a turn-off signal to the grid line end and the signal end; a data writing stage, inputting data signals to a data line end, inputting conducting signals to a grid line end, and inputting turn-off signals to a reset end and a signal end; and in the display stage, a display voltage is input to the second voltage end, a conducting signal is input to the signal end, and a closing signal is input to the grid line end and the reset end.
The technical scheme adopted for solving the technical problem of the invention is that the display panel comprises a plurality of pixel driving circuits, wherein the pixel driving circuits are the pixel driving circuits.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic structural diagram of a basic pixel driving circuit in the prior art;
FIG. 2 is a schematic structural diagram of a pixel driving circuit according to an embodiment of the present invention;
FIG. 3 is a timing diagram illustrating the operation of the pixel driving circuit shown in FIG. 2;
FIG. 4a is an equivalent circuit diagram of the pixel driving circuit shown in FIG. 2 during a reset phase;
FIG. 4b is an equivalent circuit diagram of the pixel driving circuit shown in FIG. 2 during a data writing phase;
FIG. 4c is an equivalent circuit diagram of the pixel driving circuit shown in FIG. 2 in a display stage;
wherein the reference numerals are: 1. a drive unit; 2. a light emitting unit; 3. a storage unit; 4. a reset unit; 5. writing a compensation unit; 6. a light emission control unit; VSS, a first voltage terminal; VDD, a second voltage terminal; SCAN, grid line end; EM, a signal terminal; DATA, DATA line end; RESET, a RESET terminal; m1, a first transistor; m2, a second transistor; m3, a third transistor; m4, a fourth transistor; m5, a fifth transistor; m6, a sixth transistor; m7, a seventh transistor; m8, an eighth transistor; an N1 first node; a second node of N2; a third node of N3; t1 reset phase; t2 data writing phase; t3 shows a phase; c, a storage capacitor; a T0 switching transistor; the DT drives the transistor.
Detailed Description
In order to make the technical solutions of the present invention better understood, the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
The invention will be described in more detail below with reference to the accompanying drawings. Like elements in the various figures are denoted by like reference numerals. For purposes of clarity, the various features in the drawings are not necessarily drawn to scale. Moreover, certain well-known elements may not be shown in the figures.
In the following description, numerous specific details of the invention, such as structure, materials, dimensions, processing techniques and techniques of components, are set forth in order to provide a more thorough understanding of the invention. However, as will be understood by those skilled in the art, the present invention may be practiced without these specific details.
Example 1:
as shown in fig. 1 to 4c, the present embodiment provides a pixel driving circuit, which includes a driving unit 1, a light emitting unit 2, a storage unit 3, a reset unit 4, a light emitting control unit 6, and a write compensation unit 5;
a driving unit 1 for driving the light emitting unit 2 to emit light;
the first end of the memory unit 3 is connected with the first node N1, and the second end is connected with the second node N2;
a reset unit 4 for adjusting voltages of the first node N1 and the third node N3 according to a first voltage terminal VSS and a ground terminal;
a write compensation unit 5 for writing the DATA signal of the DATA line terminal DATA and the compensation DATA to the drive unit 1 by the adjustment of the storage unit 3;
and a light emission control unit 6 for writing a display current, the magnitude of which is related to the data signal and the voltage of the second voltage terminal VDD, to the light emitting unit 2 by cooperating with the driving unit 1.
In the pixel driving circuit of this embodiment, when the driving unit 1 drives the light emitting unit 2 to emit light (pixel display), a display current is written into the light emitting unit 2, and the magnitude of the display current is related to the data signal and the voltage of the first voltage terminal VSS, but not related to the threshold voltage of the driving unit 1, so that the influence of the threshold voltage of the driving unit 1 on the display current of the light emitting unit 2 is eliminated, and the luminance uniformity of the light emitting unit 2 in the display device is effectively improved.
Specifically, the write compensation unit 5 includes: a first transistor M1 having a gate connected to the gate line terminal SCAN, a first pole connected to the DATA line terminal DATA, and a second pole connected to the first node N1; the gate of the second transistor M2 is connected to the first node N1, the first pole is connected to the DATA line terminal DATA, and the second pole is connected to the first node N1.
The drive unit 1 includes: a third transistor M3 having a gate connected to the first node N1, a first pole connected to the second voltage terminal VDD, and a second pole connected to the second node N2; a fourth transistor M4 having a gate connected to the first node N1, a first terminal connected to the third node N3, a second terminal connected to the first terminal of the light emitting unit 2, and a second terminal connected to the ground terminal of the light emitting unit 2; the fifth transistor M5 has a gate connected to the first node N1, a first pole connected to the first node N1, and a second pole connected to the first voltage terminal VSS.
The light emission control unit 6 includes: the sixth transistor M6 has a gate connected to the signal terminal EM, a first pole connected to the second node N2, and a second pole connected to the third node N3.
The reset unit 4 includes: a seventh transistor M7 having a gate connected to the RESET terminal RESET, a first pole connected to the first node N1, and a second pole connected to the first voltage terminal VSS; the eighth transistor M8 has a gate connected to the RESET terminal RESET, a first electrode connected to the third node N3, and a second electrode connected to the first terminal of the light emitting cell 2.
The storage unit 3 includes: the first pole of the storage capacitor C is connected to the first node N1, and the second pole thereof is connected to the second node N2.
In the embodiment, the first voltage terminal VSS is used for providing a reference voltage, and the second voltage terminal VDD is used for providing an operating voltage.
It should be noted that the Light Emitting unit 2 in the present embodiment may be a current-driven Light Emitting device including an LED (Light Emitting Diode) or an OLED (Organic Light Emitting Diode) in the prior art, and the present embodiment is described by taking the OLED as an example.
The present embodiment further provides a pixel driving method, based on the pixel driving circuit, where the pixel driving method includes:
in the reset phase t1, the reset unit 4 is used for adjusting the voltages of the first node N1 and the third node N3 according to the first voltage terminal VSS and the ground terminal.
In the DATA writing phase t2, the write compensation unit 5 is used to write the DATA signal of the DATA line terminal DATA and the compensation DATA to the drive unit 1 by the adjustment of the storage unit 3.
In the display phase t3, the light emission control unit 6 is used to write a display current to the light emitting unit 2 by cooperating with the driving unit 1, the magnitude of the display current being related to the data signal and the voltage of the second voltage terminal VDD.
Specifically, in the method, the second voltage terminal VDD is used for providing the working voltage, and the first voltage terminal VSS is used for providing the reference voltage; the method specifically comprises the following steps:
s11, RESET phase t1, a RESET signal is input to the first voltage terminal VSS, a turn-on signal is input to the RESET terminal RESET, and a turn-off signal is input to the gate line terminal SCAN and the signal terminal EM.
The on signal refers to a signal that can turn on the transistor when applied to the gate of the transistor, and the off signal refers to a signal that can turn off the transistor when applied to the gate of the transistor.
In the following description, all transistors are P-type transistors, so that the on signal is a low level signal and the off signal is a high level signal.
As shown in fig. 3 and 4a, in this stage, a high level is input to the gate line terminal SCAN, so that the first transistor M1 and the second transistor M2 are turned off, and further, the third transistor M3, the fourth transistor M4 and the fifth transistor M5 are turned off; a high level is input to the signal terminal EM so that the sixth transistor M6 is turned off. When a low level is input to the RESET terminal RESET, the seventh transistor M7 and the eighth transistor M8 are turned on, so that the RESET signal of the first voltage terminal VSS is written into the first node N1 through the seventh transistor M7, and the residual voltage of the first terminal of the light emitting unit 2 is discharged to the ground terminal through the eighth transistor M8.
S12, DATA write stage t2, DATA signal is input to DATA line terminal DATA, on signal is input to gate line terminal SCAN, and off signal is input to RESET terminal RESET and signal terminal EM.
As shown in fig. 3 and 4b, in this stage, that is, a high level is input to the RESET terminal RESET, so that the seventh transistor M7 and the eighth transistor M8 are turned off; a high level is input to the signal terminal EM so that the sixth transistor M6 is turned off. When a low level is inputted to the gate line terminal SCAN, the first transistor M1 is turned on, and the DATA signal at the DATA line terminal DATA is written into the gate of the second transistor M2, so that the second transistor M2 is turned on, and thus, the DATA signal at the DATA line terminal DATA is written into the first node N1 through the first transistor M1 or the second transistor M2 and stored into the storage capacitor C. In this stage, the voltage of the first node N1 finally becomes the data signal minus the threshold voltage (Vdata-Vth) of the fourth transistor M4.
S13, a display stage t3, in which a display voltage is input to the second voltage terminal VDD, a turn-on signal is input to the signal terminal EM, and a turn-off signal is input to the gate line terminal SCAN and the RESET terminal RESET.
As shown in fig. 3 and 4c, in this stage, that is, a high level is input to the gate line terminal SCAN, so that the first transistor M1 and the second transistor M2 are turned on; a high level is input to the RESET terminal RESET so that the seventh transistor M7 and the eighth transistor M8 are turned on. The signal terminal EM is inputted with a low level, and the sixth transistor M6 is turned on. Due to the effect of the above stage, the signal in the storage capacitor C makes the third transistor M3, the fourth transistor M4 and the fifth transistor M5 in a conducting state, the signal of the second voltage end VDD is written into the third node N3 through the third transistor M3 and the sixth transistor M6, i.e., the first voltage of the fourth transistor M4 is VDD, and the gate voltage of the fourth transistor M4 is Vdata-Vth, so the gate-source voltage Vgs of the fourth transistor M4 is VDD- (Vdata-Vth).
Further, the display current flowing through the light emitting unit 22 is: i isds＝1/2β(Vgs-Vth)2＝1/2β[Vdd-(Vdata-Vth)-Vth]2＝1/2β(Vdd-Vdata)2Where β ═ Cox · μ · W/L, μ denotes the electron mobility of the fourth transistor M4, and coxDenotes an insulation capacitance per unit area, and W/L denotes a width-to-length ratio of an active region of the fourth transistor M4.
It can be seen that the display current of the light emitting cell 2 is independent of the threshold voltage of the fourth transistor M4 at the display stage t3, and β is a constant determined after the panel manufacturing process is determined, so the display current of the light emitting cell 2 is only affected by the data signal voltage and the voltage of the first voltage terminal VSS.
Example 2:
the present embodiment provides a display panel, which includes a plurality of pixel driving circuits, wherein the pixel driving circuits are the pixel driving circuits described above.
Specifically, the display panel may be any product or component with a display function, such as an Organic Light Emitting Diode (OLED) display panel, electronic paper, a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, and a navigator.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
While embodiments in accordance with the invention have been described above, these embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments described. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention and various embodiments with various modifications as are suited to the particular use contemplated. The invention is limited only by the claims and their full scope and equivalents.
Claims (10)
1. A pixel driving circuit is characterized by comprising a driving unit, a light emitting unit, a storage unit, a reset unit, a light emitting control unit and a writing compensation unit;
the driving unit is used for driving the light-emitting unit to emit light;
the first end of the storage unit is connected with the first node, and the second end of the storage unit is connected with the second node;
the reset unit is used for adjusting the voltages of the first node and the third node according to the first voltage end and the grounding end;
the writing compensation unit is used for writing the data signal and the compensation data of a data line end into the driving unit through the adjustment of the storage unit;
and the light-emitting control unit is used for writing display current into the light-emitting unit through matching with the driving unit, and the magnitude of the display current is related to the data signal and the voltage of the second voltage end.
2. The pixel driving circuit according to claim 1, wherein the write compensation unit comprises:
a first transistor, wherein a grid electrode of the first transistor is connected with a grid line end, a first pole of the first transistor is connected with a data line end, and a second pole of the first transistor is connected with a first node;
and a gate of the second transistor is connected with the first node, a first pole of the second transistor is connected with the data line end, and a second pole of the second transistor is connected with the first node.
3. The pixel driving circuit according to claim 2, wherein the driving unit comprises:
a third transistor, wherein the grid electrode of the third transistor is connected with the first node, the first pole of the third transistor is connected with the second voltage end, and the second pole of the third transistor is connected with the second node;
a fourth transistor, a gate of which is connected to the first node, a first pole of which is connected to the third node, a second pole of which is connected to the first end of the light emitting unit, and a second end of the light emitting unit is connected to a ground terminal;
and a gate of the fifth transistor is connected with the first node, a first pole of the fifth transistor is connected with the first node, and a second pole of the fifth transistor is connected with the first voltage end.
4. The pixel driving circuit according to claim 3, wherein the emission control unit comprises:
and the grid electrode of the sixth transistor is connected with the signal end, the first pole of the sixth transistor is connected with the second node, and the second pole of the sixth transistor is connected with the third node.
5. The pixel driving circuit according to claim 4, wherein the reset unit comprises:
a seventh transistor, a gate of which is connected to the reset terminal, a first pole of which is connected to the first node, and a second pole of which is connected to the first voltage terminal;
and the grid electrode of the eighth transistor is connected with the reset end, the first electrode of the eighth transistor is connected with the third node, and the second electrode of the eighth transistor is connected with the first end of the light-emitting unit.
6. The pixel driving circuit according to claim 5, wherein the storage unit comprises:
and a storage capacitor having a first pole connected to the first node and a second pole connected to the second node.
7. The pixel driving circuit according to claim 5, wherein all transistors are N-type transistors; alternatively, all transistors are P-type transistors.
8. A pixel driving method based on the pixel driving circuit according to any one of claims 1 to 7, the pixel driving method comprising:
in a reset phase, the reset unit is used for adjusting the voltages of the first node and the third node according to a first voltage end and a grounding end;
in the data writing stage, the writing compensation unit is used for writing the data signals and the compensation data of the data line end into the driving unit through the adjustment of the storage unit;
in the display phase, the light-emitting control unit is used for writing display current into the light-emitting unit through matching with the driving unit, and the magnitude of the display current is related to the data signal and the voltage of the second voltage end.
9. The pixel driving method according to claim 8, wherein the pixel driving circuit is the pixel driving circuit according to claim 6, and the pixel driving method specifically comprises:
a reset stage, inputting a reset signal to the first voltage end, inputting a conducting signal to the reset end, and inputting a turn-off signal to the grid line end and the signal end;
a data writing stage, inputting data signals to a data line end, inputting conducting signals to a grid line end, and inputting turn-off signals to a reset end and a signal end;
and in the display stage, a display voltage is input to the second voltage end, a conducting signal is input to the signal end, and a closing signal is input to the grid line end and the reset end.
10. A display panel comprising a plurality of pixel driving circuits, the pixel driving circuits being the pixel driving circuits according to any one of claims 1 to 7.
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| CN112735339A (en) * | 2020-12-31 | 2021-04-30 | 合肥视涯技术有限公司 | Data current generation circuit, driving method, driving chip and display panel |
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| CN110706647A (en) * | 2018-07-09 | 2020-01-17 | 三星显示有限公司 | Display device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112735339A (en) * | 2020-12-31 | 2021-04-30 | 合肥视涯技术有限公司 | Data current generation circuit, driving method, driving chip and display panel |
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