CN101882416A - Display device and ghost eliminating method thereof - Google Patents

Display device and ghost eliminating method thereof Download PDF

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Publication number
CN101882416A
CN101882416A CN 201010206876 CN201010206876A CN101882416A CN 101882416 A CN101882416 A CN 101882416A CN 201010206876 CN201010206876 CN 201010206876 CN 201010206876 A CN201010206876 A CN 201010206876A CN 101882416 A CN101882416 A CN 101882416A
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CN
China
Prior art keywords
display
electrically coupled
control signal
pixel
voltage
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN 201010206876
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Chinese (zh)
Inventor
刘志伟
丁友信
傅春霖
徐伟钧
林男颖
柳福源
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AU Optronics Corp
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AU Optronics Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by AU Optronics Corp filed Critical AU Optronics Corp
Priority to CN 201010206876 priority Critical patent/CN101882416A/en
Publication of CN101882416A publication Critical patent/CN101882416A/en
Pending legal-status Critical Current

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Abstract

The invention discloses a display device, which comprises scanning wires, data wires, pixel transistors, pixel electrodes, a grid driver, a source driver and a discharge circuit. The data wires and the scanning wires are mutually crossed. Each pixel transistor is electrically coupled with the corresponding scanning wire and the corresponding data wire respectively, and each pixel electrode is electrically coupled with the corresponding pixel transistor. The grid driver is electrically coupled with the scanning wire, and the source driver is coupled with the data wire. The discharge circuit is electrically coupled with the grid driver and the data wire and is started to control the grid driver to simultaneously conduct the pixel transistors when the display device is closed, and the pixel electrode is electrically coupled with a reference voltage through the data wire and the discharge circuit. The invention also discloses a ghost eliminating method corresponding to the display device.

Description

Display device and ghost eliminating method thereof
Technical field
The present invention relates to the demonstration field, and particularly relevant for a kind of display device and corresponding ghost eliminating method thereof.
Background technology
Along with development of science and technology, flat display apparatus (for example, liquid crystal indicator) because of have high image quality, volume is little, in light weight and advantage such as applied range, and be widely used in the various consumption electronic products such as mobile phone, notebook computer, desktop display device and TV, and little by little replaced traditional CRT display and become the main flow of display device.
As everyone knows, known flat display apparatus is generally by the gate drivers pixel on the activation display panel in turn, and by the pixel of source electrode driver output video data to the display panel, thereby make flat display apparatus display frame.But, known flat display apparatus when closing, improper the closing that causes owing to sudden power particularly, the electric charge in the pixel of display panel can't fast and effeciently discharge, thereby causes ghost phenomena, has influenced the quality of flat display apparatus.
Summary of the invention
Purpose of the present invention is to provide a kind of display device exactly, and it can eliminate ghost phenomena.
A further object of the present invention provides a kind of ghost eliminating method of display device, and it can eliminate the ghost of display device.
The present invention proposes a kind of display device, comprises sweep trace, data line, pixel transistor, pixel electrode, gate drivers, source electrode driver and discharge circuit.Data line and sweep trace are arranged in a crossed manner mutually.Each pixel transistor is electrically coupled to corresponding scanning line and corresponding data line respectively, and each pixel electrode is electrically coupled to corresponding pixel transistor respectively.Gate drivers is electrically coupled to data line, and source electrode driver is electrically coupled to data line.Discharge circuit is electrically coupled to gate drivers and data line, and starts when display device is closed with control gate driver while switch on pixel transistor, and makes pixel electrode be electrically coupled to reference voltage by data line and discharge circuit.
In preferred embodiment of the present invention, above-mentioned discharge circuit comprises that control signal source and electric charge remove circuit.The control signal source is electrically coupled to gate drivers and is used to provide control signal with control gate driver simultaneously activation sweep trace and switch on pixel transistor.Electric charge removes circuit and is electrically coupled between data line and the reference voltage, to make pixel electrode be electrically coupled to reference voltage by data line when the pixel transistor conducting simultaneously.
In preferred embodiment of the present invention, above-mentioned gate drivers comprises first switch, and each first switch is electrically coupled to corresponding scanning line respectively and the control signal (Control Signal) sent by the control signal source respectively control with when display device is closed respectively conducting with the activation corresponding scanning line.
In preferred embodiment of the present invention, above-mentioned electric charge removes circuit and comprises second switch, and each second switch is electrically coupled to respectively between reference voltage and the corresponding data line with conducting respectively when display device is closed.Preferably, each second switch is controlled by the control signal that send in the control signal source respectively.
The present invention also proposes a kind of display device, comprises display panel, gate drivers, source electrode driver and discharge circuit with a plurality of pixels.Gate drivers is electrically coupled to display panel controlling the whether activation of each pixel, and source electrode driver is electrically coupled to display panel with the pixel of input data to activation.Discharge circuit is electrically coupled to gate drivers and display panel, and starts the pixel with control gate driver activation simultaneously display panel when display device is closed, and makes pixel be electrically coupled to reference voltage and pixel is discharged.
In preferred embodiment of the present invention, above-mentioned discharge circuit comprises that control signal source and electric charge remove circuit.The control signal source is electrically coupled to gate drivers and is used to provide control signal with control gate driver activation simultaneously pixel.Electric charge removes circuit and is electrically coupled between display panel and the reference voltage to make pixel be electrically coupled to reference voltage when the pixel activation simultaneously and pixel is discharged.
The present invention also proposes a kind of ghost eliminating method of display device, and wherein display device comprises the display panel with a plurality of pixels, and display panel has many data lines to supply video data to pixel.The ghost eliminating method of above-mentioned display device comprises: judge whether display device closes; And when judging display device when closing, the pixel of while activation display panel makes pixel be electrically coupled to reference voltage via data line.
In preferred embodiment of the present invention, the ghost eliminating method of above-mentioned display device further comprises: provide first to control signal to the pixel of display panel with the display panel of activation simultaneously when display device is closed; And provide second to control signal to display panel so that data line is electrically coupled to reference voltage.Preferably, first control signal and second control signal are same signal.
Display device of the present invention and ghost eliminating method thereof utilize discharge circuit to remove the residual charge in each pixel on the display panel apace when display device is closed, thereby avoid causing ghost phenomena.
For above-mentioned and other purposes, feature and advantage of the present invention can be become apparent, preferred embodiment cited below particularly, and cooperate appended accompanying drawing, be described in detail below.
Description of drawings
Fig. 1 illustrates the synoptic diagram into the disclosed display device of one embodiment of the invention;
Fig. 2 illustrates the sequential chart into the various signals of display device shown in Figure 1;
Fig. 3 illustrates the process flow diagram into the ghost eliminating method of the disclosed display device of one embodiment of the invention.
Wherein, Reference numeral
100: display device 110: display panel
111: sweep trace 112: data line
113: pixel transistor 114: pixel electrode
115: pixel 120: gate drivers
Switch 130 in 121: the first: source electrode driver
140: discharge circuit 141: the control signal source
142: electric charge removes circuit 145: second switch
VGH: ceiling voltage VGL: minimum voltage
CLK: clock signal CS (Control Signal): control signal
RV (Reference Voltage): reference voltage SR1, SR2~SRm: shift register
Embodiment
See also Fig. 1, it illustrates the synoptic diagram into the disclosed display device of one embodiment of the invention.Above-mentioned display device can be flat display apparatus, for example liquid crystal indicator.As shown in Figure 1, display device 100 comprises display panel 110, gate drivers 120, source electrode driver 130 and discharge circuit 140.
Particularly, display panel 110 comprises multi-strip scanning line 111, many data lines 112, a plurality of pixel transistor 113 and a plurality of pixel electrodes 114.Thereby sweep trace 111 and data line 112 are arranged in a crossed manner mutually display panel 110 is divided into a plurality of pixels 115.Pixel transistor 113 and pixel electrode 114 are distributed in respectively in the pixel 115, and the pixel transistor 113 in each pixel 115 is electrically coupled to corresponding scanning line 111 and corresponding data line 112 respectively, and the pixel electrode 114 in each pixel 115 is electrically coupled to the pixel transistor 113 in this pixel 115 respectively.
The sweep trace 111 that gate drivers 120 is electrically coupled to display panel 110 is with activation sweep trace 111 in turn, thus switch on pixel transistor 113 in turn; And source electrode driver 130 is electrically coupled to the data line 112 of display panel 110, by the pixel transistor 113 of data line 112 and conducting video data is inputed to corresponding pixel electrode 114.In addition, can provide ceiling voltage VGH and minimum voltage VGL to gate drivers 120 and source electrode driver 130 after display device 100 starts, gate drivers 120 and source electrode driver 130 are worked normally.
Discharge circuit 140 comprises that control signal source 141 and electric charge remove circuit 142.Wherein, control signal source 141 is electrically coupled to gate drivers 120 to provide control signal CS (Control Signal) to gate drivers 120, thereby when display device 100 was closed, the multi-strip scanning line 111 on control gate driver 120 display panels of activation simultaneously 110 was with the corresponding pixel transistor 113 of while conducting.Electric charge removes circuit 142 and is electrically coupled between the data line 112 and reference voltage RV (ReferenceVoltage) on the display panel 110, to make pixel electrode 114 be electrically coupled to reference voltage RV (Reference Voltage) by data line 114 when pixel transistor 113 conductings simultaneously.
Particularly, gate drivers 120 can comprise a plurality of first switches 121, and each first switch 121 is electrically coupled to a corresponding scanning line 111 respectively.When display device 100 was under the normal running situation, these first switches 121 can be normally according to the conducting one by one of order quilt.In other words, first switch 121 also can be subjected to the shift register SR1 in the gate drivers 120, the control of SR2~SRm respectively, make display device 100 when carrying out operate as normal, these first switches 121 can in turn be switched on each sweep trace 111 on the activation display panel 110 in turn, thereby guarantee that display device 100 works normally.
And display device 100 close or sudden power in, the control signal CS (Control Signal) that each first switch 121 can further be sent by control signal source 141 control, makes these first switches, 121 quilt while conductings.And the data that exported on each sweep trace 111 by shift register SR1, SR2~SRm originally will be made corresponding pixel transistor 113 therefore be switched on by the while activation.On the other hand, also can provide signal specific to each sweep trace 111 in the moment that display device 100 is closed, pass through sweep trace 111 and the pixel transistor 113 of conducting correspondence whereby by other circuit.
In addition, it will be understood by those skilled in the art that, the present invention can also not change the hardware configuration of gate drivers commonly used, only against the software setting that changes gate drivers, when the control signal CS (Control Signal) that gate drivers 120 is sent in control signal source 141 points out that display device 100 is closed, sweep trace 111 on the display panel of activation simultaneously 110 makes pixel transistor 113 conductings simultaneously on the display panel 110.
In the present embodiment, electric charge removes circuit 142 and comprises a plurality of second switches 145, and each second switch 145 is electrically coupled to respectively between a corresponding data line 112 and the reference voltage RV (Reference Voltage).The control signal CS (ControlSignal) that each second switch 145 sends by control signal source 141 controls, with conducting simultaneously when display device 100 is closed, thereby make the pixel electrode 114 on the display panel 110 be electrically coupled to reference voltage RV (Reference Voltage) through the second switch 145 of the pixel transistor 113 of conducting, data line 112, conducting.Thus, each pixel 115 on the display panel 110 just can to remove the residual charge on the pixel electrode 114 whereby, be eliminated the possible residual ghost of institute on the display device 100 by aforesaid electrical path discharge.
In addition, it will be understood by those skilled in the art that, though what be used for controlling first switch 121 and second switch 145 in the present embodiment is same control signal source 141, in fact also can adopt different control signal sources to control first switch 121 and second switch 145 respectively.Moreover reference voltage RV (Reference Voltage) can be pre-set voltage arbitrarily, for example is the common electric voltage (Common Voltage) of display device 100.
Next see also Fig. 2, it illustrates the sequential chart into the various signals of display device shown in Figure 1.As shown in Figure 2, be in state 2, promptly close or during sudden power (Power-off OrSuddenly blackout), the ceiling voltage VGH and the minimum voltage VGL of gate drivers 120 and source electrode driver 130 can change in display device 100.At this moment, display device 100 can stop to send clock signal CLK, the control signal CS that control signal source 141 is sent (Control Signal) then changes second current potential (as logic low potential) into by first current potential (as logic high potential), each gate line 111 on the control gate driver 120 activation simultaneously display panels 110 is with the pixel transistor 113 of conducting correspondence whereby, and makes each data line 112 on the display panel 110 be electrically coupled to reference voltage RV (Reference Voltage) and pixel electrode 114 is discharged.
In addition, as shown in Figure 2, because display device 100 is when carrying out work, discharge circuit 140 is in off working state, therefore the magnitude of voltage of reference voltage RV (Reference Voltage) can not done qualification during this period, as long as reference voltage can be in a certain scheduled voltage when display device 100 is closed, the common electric voltage value as display device 100 gets final product.
In addition, the present invention also provides a kind of ghost eliminating method of display device, and it is applicable to display device shown in Figure 1 100.See also Fig. 3, it illustrates the process flow diagram into the ghost eliminating method of the disclosed display device of one embodiment of the invention.As shown in Figure 3, above-mentioned ghost eliminating method comprises: judge whether display device 100 closes; And when judging that display device 100 is closed, the pixel 115 (perhaps being called each pixel transistor 113 of conducting) on the display panel of activation simultaneously 100 makes pixel 115 be electrically coupled to reference voltage RV (Reference Voltage) through data line 111.Particularly, it can provide first control signal with the pixel 115 on the display panel of activation simultaneously 110 when display device 100 is closed; And provide second control signal so that the data line 112 of display panel 110 is electrically coupled to reference voltage RV (ReferenceVoltage).Preferably, first control signal and second control signal can be the control signal CS (Control Signal) that is sent in control signal source 141.
In sum, display device of the present invention and ghost eliminating method thereof utilize discharge circuit to remove the residual charge in each pixel on the display panel apace when display device is closed, thereby avoid causing ghost phenomena.
Certainly; the present invention also can have other various embodiments; under the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection domain of the appended claim of the present invention.

Claims (10)

1. a display device is characterized in that, comprising:
The multi-strip scanning line;
Many data lines, arranged in a crossed manner mutually with these sweep traces;
A plurality of pixel transistors, each these pixel transistor is electrically coupled to a corresponding scanning line and a corresponding data line respectively;
A plurality of pixel electrodes, each these pixel electrode is electrically coupled to the pixel transistor of a correspondence respectively;
One gate drivers is electrically coupled to these sweep traces;
The one source pole driver is electrically coupled to these data lines; And
One discharge circuit is electrically coupled to this gate drivers and these data lines;
Wherein, this discharge circuit starts when this display device is closed controlling these pixel transistors of this gate drivers conducting simultaneously, and makes these pixel electrodes be electrically coupled to a reference voltage by these data lines and this discharge circuit.
2. display device according to claim 1 is characterized in that, this discharge circuit comprises:
One control signal source is electrically coupled to this gate drivers and is used to provide a control signal to control this gate drivers these sweep traces of activation and these pixel transistors of conducting simultaneously; And
One electric charge removes circuit, is electrically coupled between these data lines and this reference voltage, to make these pixel electrodes be electrically coupled to this reference voltage by these data lines when the conducting simultaneously of these pixel transistors.
3. display device according to claim 2 is characterized in that, this gate drivers comprises:
A plurality of first switches, each these first switch are electrically coupled to a corresponding scanning line respectively and this control signal of sending by this control signal source respectively control with when this display device is closed respectively conducting with this corresponding scanning line of activation.
4. display device according to claim 2 is characterized in that, this electric charge removes circuit and comprises:
A plurality of second switches, each these second switch are electrically coupled to respectively between this reference voltage and the corresponding data line with conducting respectively when this display device is closed.
5. display device according to claim 4 is characterized in that, each these second switch is controlled by this control signal that send in this control signal source respectively.
6. a display device is characterized in that, comprising:
One display panel comprises a plurality of pixels;
One gate drivers is electrically coupled to this display panel to control the whether activation of each these pixel;
The one source pole driver is electrically coupled to this display panel with the pixel of input data to activation; And
One discharge circuit is electrically coupled to this gate drivers and this display panel;
Wherein, this discharge circuit starts when this display device is closed controlling these pixels of this display panel of this gate drivers activation simultaneously, and makes these pixels be electrically coupled to a reference voltage and these pixels are discharged.
7. display device according to claim 6 is characterized in that, this discharge circuit comprises:
One control signal source is electrically coupled to this gate drivers and is used to provide a control signal to control these pixels of this gate drivers activation simultaneously; And
One electric charge removes circuit, is electrically coupled between this display panel and this reference voltage to make these pixels be electrically coupled to this reference voltage when the activation simultaneously of these pixels and these pixels are discharged.
8. the ghost eliminating method of a display device is characterized in that, this display device comprises that one has the display panel of a plurality of pixels, and this display panel has many data lines to supply video data to these pixels, and the ghost eliminating method of this display device comprises:
Steps A: judge whether this display device closes; And
Step B: when judging this display device when closing, these pixels of this display panel of while activation make these pixels be electrically coupled to a reference voltage through these data lines.
9. the ghost eliminating method of display device according to claim 8 is characterized in that, step B comprises:
Step B1: provide one first to control signal to this display panel these pixels with this display panel of activation simultaneously when this display device is closed; And
Step B2: provide one second to control signal to this display panel so that these data lines are electrically coupled to this reference voltage.
10. the ghost eliminating method of display device according to claim 9 is characterized in that, this first control signal and this second control signal are same signal.
CN 201010206876 2010-06-21 2010-06-21 Display device and ghost eliminating method thereof Pending CN101882416A (en)

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Application Number Priority Date Filing Date Title
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Cited By (18)

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CN103050103A (en) * 2012-12-20 2013-04-17 深圳市华星光电技术有限公司 Drive circuit of LCD (liquid crystal display) panel, driving method of drive circuit and LCD device
CN104297969A (en) * 2014-10-28 2015-01-21 京东方科技集团股份有限公司 Liquid crystal display panel, discharging method thereof and display device
CN104361866A (en) * 2014-12-02 2015-02-18 京东方科技集团股份有限公司 Driving device and driving method of display panel and display device
CN104616615A (en) * 2015-02-10 2015-05-13 昆山龙腾光电有限公司 Screen clearing circuit and display device
US9135881B2 (en) 2012-12-20 2015-09-15 Shenzhen China Star Optoelectronics Technology Co., Ltd LCD panel driver circuit, driving method and LCD device
CN105096888A (en) * 2015-08-28 2015-11-25 京东方科技集团股份有限公司 Array substrate, and display panel and driving method thereof
CN105185293A (en) * 2015-10-19 2015-12-23 京东方科技集团股份有限公司 Display panel, driving method thereof, and display device
CN105489182A (en) * 2016-01-05 2016-04-13 京东方科技集团股份有限公司 Display substrate and display device
CN105981095A (en) * 2013-12-11 2016-09-28 夏普株式会社 Liquid crystal display device and drive method therefor
CN107068081A (en) * 2017-03-01 2017-08-18 京东方科技集团股份有限公司 A kind of display methods and display device
CN107452334A (en) * 2017-08-30 2017-12-08 京东方科技集团股份有限公司 Image element circuit and its driving method, display base plate and its driving method, display device
CN107644612A (en) * 2016-07-22 2018-01-30 上海和辉光电有限公司 Display device and its driving method
CN107886890A (en) * 2017-12-28 2018-04-06 维沃移动通信有限公司 Display panel circuit, the control method of display panel circuit and mobile terminal
CN108172184A (en) * 2018-01-02 2018-06-15 京东方科技集团股份有限公司 Shutdown discharge circuit and display module
CN108281118A (en) * 2018-01-09 2018-07-13 昆山龙腾光电有限公司 Display panel and liquid crystal display device
WO2019062579A1 (en) * 2017-09-30 2019-04-04 京东方科技集团股份有限公司 Pixel circuit and driving method thereof, and display device
CN110322846A (en) * 2018-03-29 2019-10-11 京东方科技集团股份有限公司 A kind of the charge release circuit and its driving method, display device of display device
CN111798800A (en) * 2020-07-21 2020-10-20 合肥维信诺科技有限公司 Driving circuit, driving method, display panel and display device

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Cited By (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9135881B2 (en) 2012-12-20 2015-09-15 Shenzhen China Star Optoelectronics Technology Co., Ltd LCD panel driver circuit, driving method and LCD device
CN103050103A (en) * 2012-12-20 2013-04-17 深圳市华星光电技术有限公司 Drive circuit of LCD (liquid crystal display) panel, driving method of drive circuit and LCD device
CN105981095A (en) * 2013-12-11 2016-09-28 夏普株式会社 Liquid crystal display device and drive method therefor
CN105981095B (en) * 2013-12-11 2018-12-07 夏普株式会社 Liquid crystal display device and its driving method
CN104297969A (en) * 2014-10-28 2015-01-21 京东方科技集团股份有限公司 Liquid crystal display panel, discharging method thereof and display device
US9767758B2 (en) 2014-12-02 2017-09-19 Boe Technology Group Co., Ltd. Driving apparatus of display panel and driving method thereof, display device
CN104361866A (en) * 2014-12-02 2015-02-18 京东方科技集团股份有限公司 Driving device and driving method of display panel and display device
CN104616615A (en) * 2015-02-10 2015-05-13 昆山龙腾光电有限公司 Screen clearing circuit and display device
CN104616615B (en) * 2015-02-10 2017-07-18 昆山龙腾光电有限公司 Cls circuit and display device
CN105096888A (en) * 2015-08-28 2015-11-25 京东方科技集团股份有限公司 Array substrate, and display panel and driving method thereof
CN105185293A (en) * 2015-10-19 2015-12-23 京东方科技集团股份有限公司 Display panel, driving method thereof, and display device
CN105185293B (en) * 2015-10-19 2017-10-24 京东方科技集团股份有限公司 A kind of display panel, its driving method and display device
US10204578B2 (en) 2016-01-05 2019-02-12 Boe Technology Group Co., Ltd. Display substrate and display device
CN105489182A (en) * 2016-01-05 2016-04-13 京东方科技集团股份有限公司 Display substrate and display device
CN105489182B (en) * 2016-01-05 2018-01-16 京东方科技集团股份有限公司 Display base plate and display device
CN107644612A (en) * 2016-07-22 2018-01-30 上海和辉光电有限公司 Display device and its driving method
CN107644612B (en) * 2016-07-22 2019-10-18 上海和辉光电有限公司 Display device and its driving method
US10510291B2 (en) 2017-03-01 2019-12-17 Boe Technology Group Co., Ltd. Display method and display device
CN107068081A (en) * 2017-03-01 2017-08-18 京东方科技集团股份有限公司 A kind of display methods and display device
US10803806B2 (en) 2017-08-30 2020-10-13 Boe Technology Group Co., Ltd. Pixel circuit and method for driving the same, display substrate and method for driving the same, and display apparatus
CN107452334A (en) * 2017-08-30 2017-12-08 京东方科技集团股份有限公司 Image element circuit and its driving method, display base plate and its driving method, display device
WO2019041818A1 (en) * 2017-08-30 2019-03-07 京东方科技集团股份有限公司 Pixel circuit and driving method thereof, display substrate and driving method thereof, and display apparatus
WO2019062579A1 (en) * 2017-09-30 2019-04-04 京东方科技集团股份有限公司 Pixel circuit and driving method thereof, and display device
US11030959B2 (en) 2017-09-30 2021-06-08 Boe Technology Group Co., Ltd. Pixel circuit and driving method thereof, and display device
CN107886890A (en) * 2017-12-28 2018-04-06 维沃移动通信有限公司 Display panel circuit, the control method of display panel circuit and mobile terminal
CN108172184A (en) * 2018-01-02 2018-06-15 京东方科技集团股份有限公司 Shutdown discharge circuit and display module
CN108281118A (en) * 2018-01-09 2018-07-13 昆山龙腾光电有限公司 Display panel and liquid crystal display device
CN110322846A (en) * 2018-03-29 2019-10-11 京东方科技集团股份有限公司 A kind of the charge release circuit and its driving method, display device of display device
CN111798800A (en) * 2020-07-21 2020-10-20 合肥维信诺科技有限公司 Driving circuit, driving method, display panel and display device

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