CN110689845B - Pixel driving circuit and driving method thereof - Google Patents
Pixel driving circuit and driving method thereof Download PDFInfo
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- CN110689845B CN110689845B CN201911027905.7A CN201911027905A CN110689845B CN 110689845 B CN110689845 B CN 110689845B CN 201911027905 A CN201911027905 A CN 201911027905A CN 110689845 B CN110689845 B CN 110689845B
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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]
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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]
- G09G3/3275—Details of drivers for data electrodes
- G09G3/3291—Details of drivers for data electrodes in which the data driver supplies a variable data voltage for setting the current through, or the voltage across, the light-emitting elements
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- Theoretical Computer Science (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Control Of El Displays (AREA)
Abstract
The invention provides a pixel driving circuit and a driving method thereof, wherein the pixel driving circuit comprises a first TFT switch connected between a light-emitting element and a power supply anode, a second TFT switch positioned at the intersection of a gate line and a data line and connected with the first TFT switch, a third TFT switch connected between the first TFT switch and the power supply anode, a fourth TFT switch connected with a conducting signal and a charging signal, a first capacitor and a second capacitor; the first capacitor is connected between the positive electrode of the power supply and the first TFT switch, and the second capacitor is connected between the fourth TFT switch and the negative electrode of the power supply; the process that the negative electrode of the power supply is changed from negative voltage to ground is combined with the capacitor to generate coupling voltage, and residual charges on the first capacitor are removed. The invention is realized by generating a circuit which can clear the residual charge on the first capacitor C1; the process of changing the negative electrode ELVSS of the power supply from negative voltage to ground GND when the power is off is combined with the capacitor to generate a coupling voltage to remove the residual charge on the first capacitor C1.
Description
Technical Field
The invention relates to the technical field of display panels, in particular to a pixel driving circuit and a driving method thereof.
Background
The architectures of the existing common organic light emitting panels (OLEDs) are 2T1C, 3T1C, and 5T 2C. Fig. 1 is a schematic diagram of a 2T1C architecture, in which the 2T1C architecture includes a first TFT switch Q1, a second TFT switch Q2 and a capacitor C, and the first TFT switch Q1 is a driving TFF switch connected to the light emitting device 30; the capacitor C is connected between the gate of the first TFT switch Q1 and the positive power supply ELVDD; the second TFT switch Q2 is located at the intersection of the gate line 10 and the data line 20; the light emitting element 30 is positioned between the power supply positive electrode ELVDD and the power supply negative electrode ELVSS.
If the power is lost too quickly during power-off, the second TFT switch Q2 in fig. 1 is turned off before the charge on the capacitor C is emptied, and the charge on the capacitor C will remain, which will cause the threshold voltage Vth of the first TFT switch Q1 to drift, which has a certain effect on the lifetime of the organic light emitting panel.
Disclosure of Invention
The invention aims to provide a pixel driving circuit for improving charge residue and a driving method thereof.
The invention provides a pixel driving circuit, which is connected with a grid line and a data line and connected with a light-emitting element, wherein the light-emitting element is positioned between a positive electrode and a negative electrode of a power supply; the pixel driving circuit is also connected with a conducting signal and a charging signal; the light-emitting diode comprises a first TFT switch connected between a light-emitting element and a power supply anode, a second TFT switch positioned at the intersection of a gate line and a data line and connected with the first TFT switch, a third TFT switch connected between the first TFT switch and the power supply anode, a fourth TFT switch connected with a conducting signal and a charging signal, a first capacitor and a second capacitor; the first capacitor is connected between the positive electrode of the power supply and the first TFT switch, and the second capacitor is connected between the fourth TFT switch and the negative electrode of the power supply; the process that the negative electrode of the power supply is changed from negative voltage to ground is combined with the capacitor to generate coupling voltage, and residual charges on the first capacitor are removed.
Preferably, the control end of the first TFT switch is connected to the first end of the first capacitor, the second end of the second TFT switch, and the second end of the third TFT switch, the first end of the first TFT switch is connected to the positive electrode of the power supply, and the second end of the first TFT switch is connected to the positive electrode of the light emitting element; the control end of the second TFT switch is connected with the gate line, and the first passage end of the second TFT switch is connected with the data line; the control ends of the third TFT switches are connected with the second path end of the fourth TFT switch and the first end of the second capacitor, and the first path ends of the third TFT switches are connected with the second end of the first capacitor and the positive electrode of the power supply; the control point of the fourth TFT switch is connected with the charging signal, and the first path end of the fourth TFT switch is connected with the conducting signal; the second end of the second capacitor is connected with the negative electrode of the power supply.
The invention also provides a driving method of the pixel driving circuit, wherein the working voltage of the negative electrode of the power supply is set to be V2, the working voltage of the charging signal is set to be V1, the voltage for turning on the fourth TFT switch by the conducting signal is Vgh, Vdata min is the minimum data voltage of the data line, V1 meets the requirements of V1-ELVDD < Vth, V1-Vdata min < Vth, V1-V2> Vth, wherein ELVDD is the voltage of the positive electrode of the power supply, Vth is the threshold voltage of the first TFT switch and the third TFT switch, and Vdata min is the minimum data voltage of the data line.
Preferably, the control end of the first TFT switch, the first end of the first capacitor, the second path end of the second TFT switch, and the second path end of the third TFT switch are set to converge at a point a; the control end of the third TFT switch, the second path end of the fourth TFT switch and the first end of the second capacitor are gathered at a point B; the second end of the first capacitor, the positive electrode of the power supply and the first path end of the third TFT switch are converged at a point C;
when the capacitor is electrified, a conducting signal is input with high level, the fourth TFT switch is turned on, a charging signal enters a point B through the fourth TFT switch, and the voltages at two ends of the second capacitor are V1 and V2 respectively; after the negative electrode of the power supply is stable, the conducting signal is grounded or other, the fourth TFT switch is closed, after the fourth TFT switch is closed, the charging signal is grounded or other signals can not cause the fourth TFT switch to be opened, and the voltage of the point B is V1; at this time V1-ELVDD < Vth, V1-Vdata min < Vth, the third TFT switch Q3 is still not open;
when the power is off, the fourth TFT switch is closed, and the voltage at the point B is raised to V3, V3 is V1-V2 in the process that the voltage of the negative electrode of the power supply is changed from V2 to ground; at the moment, the anode of the power supply is grounded, the voltage difference between the point B and the point C is V3-0-V3-V1-V2 > Vth, and the third TFT switch is turned on; the residual charge on the point A is conducted to the point C through the third TFT switch, and the point C is grounded, so that the residual charge on the first capacitor can be released.
Preferably, the on signal goes high at intervals to turn on the second TFT switch, the operating voltage V1 of the charging signal charges the point B, the on signal is grounded or otherwise to turn off the fourth TFT switch, and after the fourth TFT switch is turned off, the charging signal is grounded or otherwise does not cause the fourth TFT switch to be turned on.
The invention is realized by generating a circuit which can clear the residual charge on the first capacitor C1; the process of changing the negative electrode ELVSS of the power supply from negative voltage to ground GND when the power is off is combined with the capacitor to generate a coupling voltage to remove the residual charge on the first capacitor C1.
Drawings
FIG. 1 is a schematic structural diagram of a conventional organic light emitting panel adopting a 2T1C architecture;
FIG. 2 is a schematic diagram of a pixel driving circuit according to the present invention;
FIG. 3 is a waveform diagram of driving signals of a pixel driving circuit according to a first embodiment of the present invention;
fig. 4 is a waveform diagram of driving signals of a second embodiment of the pixel driving circuit according to the invention.
Detailed Description
The present invention is further illustrated by the following figures and specific examples, which are to be understood as illustrative only and not as limiting the scope of the invention, which is to be given the full breadth of the appended claims and any and all equivalent modifications thereof which may occur to those skilled in the art upon reading the present specification.
For the sake of simplicity, the drawings only schematically show the parts relevant to the present invention, and they do not represent the actual structure as a product. In addition, in order to make the drawings concise and understandable, components having the same structure or function in some of the drawings are only schematically illustrated or only labeled. In this document, "one" means not only "only one" but also a case of "more than one".
The present invention discloses a pixel driving circuit for an organic light emitting panel, as shown in fig. 2, the pixel driving circuit is connected to a gate line 10 and a data line 20, and is connected to a light emitting element 30, and the light emitting element 30 is located between a power positive electrode ELVDD and a power negative electrode ELVSS. The pixel driving circuit is also connected with a conducting signal Dg and a charging signal Ds, and the conducting signal Dg and the charging signal Ds are both signals given by the control chip.
The pixel driving circuit includes a first TFT switch Q1 connected between the light emitting element 30 and the power supply positive electrode ELVDD, a second TFT switch Q2 located at the intersection of the gate line 10 and the data line 20, a third TFT switch Q3, a fourth TFT switch Q4, a first capacitor C1, and a second capacitor C2.
It should be noted that each TFT switch according to the following embodiments includes a control terminal, a first via terminal and a second via terminal, the control terminal is a gate, one of the via terminals is a source, and the other via terminal is a drain. When the voltages received by the control end, the first path end and the second path end meet the opening condition of the TFT switch, the source electrode and the drain electrode are connected through the semiconductor layer, and the TFT switch is in an opening state at the moment, otherwise, the TFT switch is in a closing state.
The control end of the first TFT switch Q1 is point a, the control ends of the first TFT switch Q1 are both connected to the first end of the first capacitor C1 and the second end of the second TFT switch Q2, the first end of the first TFT switch Q1 is point C and is connected to the power supply anode ELVDD, and the second end of the first TFT switch Q1 is connected to the anode of the light emitting device 30.
A control terminal of the second TFT switch Q2 is connected to the gate line 10, a first path terminal of the second TFT switch Q2 is connected to the data line 20, and a second path terminal of the second TFT switch Q2 is connected to a control terminal of the first TFT switch Q1.
The control terminal of the third TFT switch Q3 is a point B and is connected to the second path terminal of the fourth TFT switch Q4, the first path terminals of the third TFT switch Q3 are connected to the second terminal of the first capacitor C1 and the power supply positive electrode ELVDD, and the second path terminal of the third TFT switch Q3 is connected to a point a.
A control point of the fourth TFT switch Q4 is connected to the charging signal Ds, a first path terminal of the fourth TFT switch Q4 is connected to the turn-on signal Dg, and a second path terminal of the fourth TFT switch Q4 is connected to a control terminal of the third TFT switch Q3.
The first end of the first capacitor C1 is connected with the point A, and the second end thereof is connected with the point C; the first end of the second capacitor C2 is connected to point B, and the second end thereof is connected to the power negative electrode ELVSS.
The control terminal of the first TFT switch Q1, the first terminal of the first capacitor C1, the second path terminal of the second TFT switch Q2, and the second path terminal of the third TFT switch Q3 converge at point a; the second end of the first capacitor C1, the power supply anode ELVDD and the first path end of the third TFT switch Q3 converge at a point C; the control terminal of the third TFT switch Q3, the second path terminal of the fourth TFT switch Q4, and the first terminal of the second capacitor C2 converge at point B.
FIG. 3 is a waveform diagram of driving signals of the pixel driving circuit according to the present invention, wherein the working voltage of the power source cathode ELVSS is set to V2, and V2 is set to a negative voltage; the operating voltage of the charging signal Ds is V1, and the voltage at which the on signal Dg turns on the fourth TFT switch Q4 is Vgh. Vth is the threshold voltage of the first TFT switch Q1 and the third TFT switch Q3, Vdata min is the minimum data voltage of the data line 20, V1 is determined to be positive voltage or negative voltage and specific magnitude according to actual conditions on the basis that V1-ELVDD < Vth and V1-Vdata min < Vth, V1-V2> Vth are satisfied, the process that the negative electrode ELVSS of the power supply is changed from negative voltage to ground is combined with a capacitor to generate coupling voltage and clear residual charges on the first capacitor C1
The invention also discloses a driving method of the pixel driving circuit, which comprises the following steps:
when Power is ON, the ON signal Dg inputs a high level Vgh, the fourth TFT switch Q4 is turned ON, the charging signal Ds enters a point B through the fourth TFT switch Q4, and voltages at two ends of the second capacitor C2 are V1 and V2, respectively.
After the power negative electrode ELVSS is stabilized, the turn-on signal Dg is grounded to GND or otherwise (e.g., a low voltage Vgl), the fourth TFT switch Q4 is turned off, and after the fourth TFT switch Q4 is turned off, the charging signal Ds is grounded to GND or otherwise (e.g., a low voltage Vgl) does not cause the fourth TFT switch Q4 to be turned on, because the fourth TFT switch Q4 is turned off at this time, and the voltage at the point B is still V1; at this time, V1-ELVDD < Vth, V1-Vdata min < Vth, so the third TFT switch Q3 is still not open, not affecting the operation of other cells.
The charging signal Ds and the conducting signal Dg may determine whether to multiplex other existing signals and perform the above-mentioned actions according to actual conditions.
When the power is turned off, because the fourth TFT switch Q4 is turned off, the voltage at the point B rises to V3 due to the capacitor bootstrap effect during the process of changing the voltage of the power negative electrode ELVSS from V2 to the ground GND, and V3-V1-V2. At this time, the anode ELVDD of the power supply is grounded to GND, the voltage difference between the point B and the point C is V3-0, V3, V1-V2> Vth, and the third TFT switch Q3 is turned on.
The residual charge at the point a is conducted to the point C through the third TFT switch Q3, and the point C is grounded GND, so that the residual charge on the first capacitor C1 can be discharged.
As shown in fig. 4, the fourth TFT switch Q4 may be turned on by repeatedly turning the turn-on signal Dg to the high level Vgh at intervals of time T, the operating voltage V1 of the charging signal Ds charges the point B, then the turn-on signal Dg is grounded to GND or other (e.g. positive voltage) to turn off the fourth TFT switch Q4, and after the fourth TFT switch Q4 is turned off, the fourth TFT switch Q4 is not caused by the grounding of the charging signal Ds to GND or other (e.g. positive voltage).
In addition, V3 ═ V1-V2< Vth can be set according to the actual TFT V-I curve, and it is only necessary that the charge on the first capacitor C1 can be released within a certain time even when the point B is V3.
The invention is realized by generating a circuit which can clear the residual charge on the first capacitor C1; the process of changing the negative electrode ELVSS of the power supply from negative voltage to ground GND when the power is off is combined with the capacitor to generate a coupling voltage to remove the residual charge on the first capacitor C1.
Although the preferred embodiments of the present invention have been described in detail, the present invention is not limited to the details of the foregoing embodiments, and various equivalent changes (such as number, shape, position, etc.) may be made to the technical solution of the present invention within the technical spirit of the present invention, and these equivalent changes are all within the protection scope of the present invention.
Claims (4)
1. A pixel driving circuit is connected with a gate line and a data line and connected with a light-emitting element, wherein the light-emitting element is positioned between a power supply positive electrode and a power supply negative electrode; the pixel driving circuit is also connected with a conducting signal and a charging signal; the light-emitting diode is characterized by comprising a first TFT switch connected between a light-emitting element and a power supply anode, a second TFT switch positioned at the intersection of a gate line and a data line and connected with the first TFT switch, a third TFT switch connected between the first TFT switch and the power supply anode, a fourth TFT switch connected with a conducting signal and a charging signal, a first capacitor and a second capacitor; the first capacitor is connected between the positive electrode of the power supply and the first TFT switch, and the second capacitor is connected between the fourth TFT switch and the negative electrode of the power supply; the process that the negative electrode of the power supply is changed from negative voltage to grounding is combined with the capacitor to generate coupling voltage, and residual charges on the first capacitor are removed; the control end of the first TFT switch is connected with the first end of the first capacitor, the second end of the second TFT switch and the second end of the third TFT switch, the first end of the first TFT switch is connected with the anode of the power supply, and the second end of the first TFT switch is connected with the anode of the light-emitting element; the control end of the second TFT switch is connected with the gate line, and the first passage end of the second TFT switch is connected with the data line; the control ends of the third TFT switches are connected with the second path end of the fourth TFT switch and the first end of the second capacitor, and the first path ends of the third TFT switches are connected with the second end of the first capacitor and the positive electrode of the power supply; the control point of the fourth TFT switch is connected with the charging signal, and the first path end of the fourth TFT switch is connected with the conducting signal; the second end of the second capacitor is connected with the negative electrode of the power supply.
2. A driving method of a pixel driving circuit using the pixel driving circuit according to claim 1, wherein the operating voltage of the negative electrode of the power supply is set to V2, the operating voltage of the charging signal is set to V1, the voltage of the turn-on signal for turning on the fourth TFT switch is set to Vgh, Vdata min is the minimum data voltage of the data line, and V1 satisfies V1-ELVDD < Vth and V1-Vdatamin < Vth, V1-V2> Vth, where ELVDD is the voltage of the positive electrode of the power supply, Vth is the threshold voltage of the first TFT switch and the third TFT switch, and Vdata min is the minimum data voltage of the data line.
3. The driving method of the pixel driving circuit according to claim 2, wherein the control terminal of the first TFT switch, the first terminal of the first capacitor, the second terminal of the second TFT switch, and the second terminal of the third TFT switch are set to converge at a point a; the control end of the third TFT switch, the second path end of the fourth TFT switch and the first end of the second capacitor are gathered at a point B; the second end of the first capacitor, the positive electrode of the power supply and the first path end of the third TFT switch are converged at a point C;
when the capacitor is electrified, a conducting signal is input with high level, the fourth TFT switch is turned on, a charging signal enters a point B through the fourth TFT switch, and the voltages at two ends of the second capacitor are V1 and V2 respectively; after the negative electrode of the power supply is stable, the conducting signal is grounded or other, the fourth TFT switch is closed, after the fourth TFT switch is closed, the charging signal is grounded or other signals can not cause the fourth TFT switch to be opened, and the voltage of the point B is V1; at this time V1-ELVDD < Vth, V1-Vdata min < Vth, the third TFT switch Q3 is still not open;
when the power is off, the fourth TFT switch is closed, and the voltage at the point B is raised to V3, V3 is V1-V2 in the process that the voltage of the negative electrode of the power supply is changed from V2 to ground; at the moment, the anode of the power supply is grounded, the voltage difference between the point B and the point C is V3-0-V3-V1-V2 > Vth, and the third TFT switch is turned on; the residual charge on the point A is conducted to the point C through the third TFT switch, and the point C is grounded, so that the residual charge on the first capacitor can be released.
4. The driving method of the pixel driving circuit according to claim 3, wherein the conducting signal goes high at intervals to turn on the second TFT switch, the operating voltage V1 of the charging signal charges the point B, the conducting signal is grounded or otherwise to turn off the fourth TFT switch, and after the fourth TFT switch is turned off, the charging signal is grounded or otherwise does not cause the fourth TFT switch to be turned on.
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Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1816838A (en) * | 2003-07-02 | 2006-08-09 | 皇家飞利浦电子股份有限公司 | Electroluminescent display devices |
| KR20070118446A (en) * | 2006-06-12 | 2007-12-17 | 엘지.필립스 엘시디 주식회사 | Organic light diode display |
| CN101329836A (en) * | 2007-06-21 | 2008-12-24 | 三星Sdi株式会社 | Organic led display device |
| CN101542572A (en) * | 2006-11-28 | 2009-09-23 | 皇家飞利浦电子股份有限公司 | Active matrix display device with optical feedback and driving method thereof |
| CN202838917U (en) * | 2012-10-23 | 2013-03-27 | 京东方科技集团股份有限公司 | Pixel drive circuit and display device |
| CN203118413U (en) * | 2013-02-22 | 2013-08-07 | 合肥京东方光电科技有限公司 | Pixel unit driving circuit, pixel unit and display device |
| CN104200777A (en) * | 2014-09-25 | 2014-12-10 | 上海天马有机发光显示技术有限公司 | Pixel circuit as well as driving method, display panel and display device thereof |
| KR20170132598A (en) * | 2016-05-24 | 2017-12-04 | 엘지전자 주식회사 | Pixel circuit comprising organic light emitting diode and display device comprising the pixel circuit |
| CN108597450A (en) * | 2018-04-26 | 2018-09-28 | 京东方科技集团股份有限公司 | Pixel circuit and its driving method, display panel |
| CN110335566A (en) * | 2018-03-28 | 2019-10-15 | 夏普株式会社 | Use the pixel circuit for executing luminescent device compensation of plug-in |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102406609B1 (en) * | 2018-02-19 | 2022-06-09 | 삼성디스플레이 주식회사 | Pixel and organic light emitting display device including the same |
-
2019
- 2019-10-28 CN CN201911027905.7A patent/CN110689845B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1816838A (en) * | 2003-07-02 | 2006-08-09 | 皇家飞利浦电子股份有限公司 | Electroluminescent display devices |
| KR20070118446A (en) * | 2006-06-12 | 2007-12-17 | 엘지.필립스 엘시디 주식회사 | Organic light diode display |
| CN101542572A (en) * | 2006-11-28 | 2009-09-23 | 皇家飞利浦电子股份有限公司 | Active matrix display device with optical feedback and driving method thereof |
| CN101329836A (en) * | 2007-06-21 | 2008-12-24 | 三星Sdi株式会社 | Organic led display device |
| CN202838917U (en) * | 2012-10-23 | 2013-03-27 | 京东方科技集团股份有限公司 | Pixel drive circuit and display device |
| CN203118413U (en) * | 2013-02-22 | 2013-08-07 | 合肥京东方光电科技有限公司 | Pixel unit driving circuit, pixel unit and display device |
| CN104200777A (en) * | 2014-09-25 | 2014-12-10 | 上海天马有机发光显示技术有限公司 | Pixel circuit as well as driving method, display panel and display device thereof |
| KR20170132598A (en) * | 2016-05-24 | 2017-12-04 | 엘지전자 주식회사 | Pixel circuit comprising organic light emitting diode and display device comprising the pixel circuit |
| CN110335566A (en) * | 2018-03-28 | 2019-10-15 | 夏普株式会社 | Use the pixel circuit for executing luminescent device compensation of plug-in |
| CN108597450A (en) * | 2018-04-26 | 2018-09-28 | 京东方科技集团股份有限公司 | Pixel circuit and its driving method, display panel |
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