CN103440841A - Pixel circuit of organic light-emitting display and control method thereof - Google Patents
Pixel circuit of organic light-emitting display and control method thereof Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 13
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- 239000003990 capacitor Substances 0.000 abstract description 15
- 238000007600 charging Methods 0.000 description 9
- 239000010409 thin film Substances 0.000 description 4
- 229910004205 SiNX Inorganic materials 0.000 description 3
- 229910021417 amorphous silicon Inorganic materials 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000010408 film Substances 0.000 description 3
- 229920001621 AMOLED Polymers 0.000 description 2
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Abstract
The invention discloses a pixel circuit of an organic light-emitting display and a control method thereof. The anode and the cathode of an OLED are respectively connected with a power supply and a first current communicating end of a first switching tube, a first current communicating end of a driving tube is respectively connected with a second current communicating end of a second switching tube, a first current communicating end of a third switching tube and a second current communicating end of the first switching tube, and a second current communicating end of the driving tube is connected with the ground; a first current communicating end of the second switching tube is connected with a signal input end; a first current communicating end and a second current communicating end of a fourth switching tube are respectively connected with a second current communicating end of the third switching tube and the ground, and a capacitor is in tandem connection between a second control signal end and the first current communicating end of the fourth switching tube. The pixel circuit can effectively compensate threshold voltage drift of the driving tube and duplicate signal currents.
Description
[technical field]
The present invention relates to active driving organic light emitting display technology, relate in particular to a kind of image element circuit and control method thereof of organic light emitting display.
[background technology]
Luminosity is high, driving voltage is low owing to having for active driving organic light emitting display (AMOLED), fast response time, without high, the ultralight advantage such as ultra-thin of visual angle restriction, efficiency, there is huge application prospect in fields such as flat-panel monitors.At present, the backplane technology that is applied to AMOLED mainly contains metal-oxide-semiconductor field effect transistor, hydrogenation non crystal silicon film transistor (α-Si:H TFT), low-temperature polysilicon film transistor (LTPS TFT), metal oxide thin-film transistor and OTFT.
Fig. 1 is the current drive-type organic light-emitting display device picture element circuit diagram of the employing current-mirror structure of prior art.As shown in Figure 1, in address phase, sweep signal Vscan is high level, and T1 pipe and T2 pipe are opened, marking current Idata is divided into two parts and acts on image element circuit: a part is filled (putting) electricity through the T1 pipe to memory capacitance Cs, and another part flows to the drain electrode of T3 pipe through the T2 pipe.When the electric current of the T3 pipe drain electrode of flowing through equates with marking current Idata, (putting) electric process that fills of image element circuit finishes.Because T3 pipe and T4 pipe have formed basic current-mirror structure, the electric current (drive current of OLED) of the T4 pipe of therefore ideally flowing through is also Idata.After address phase finishes, the voltage of storing in Cs can act on the grid of T4 pipe, and the T4 pipe that works in saturation region also can provide the OLED drive current equated with marking current Idata.
In the situation that ignore the charge injection effect of T1 pipe and the clock punchthrough effect of sweep signal Vscan, the filling of this current mirror type image element circuit (putting) electricity time corresponding marking current during with former frame, the characteristic of the electric current of the T3 pipe of flowing through and Idata, Cs and T3 pipe etc. are relevant.Simultaneously, this image element circuit also exists T3 pipe and the unmatched problem of T4 pipe electric parameter.In address phase, the T3 pipe all works in saturation region with the T4 pipe and gate source voltage is identical, and now the T3 pipe has identical threshold voltage shift with the T4 pipe.But, after entering non-address phase, the T4 pipe can continue to operate in saturation region, the T3 pipe can work in linear zone.Because the threshold voltage shift of TFT linear zone is greater than the threshold voltage shift of its saturation region, therefore, after work a period of time, the threshold voltage of T3 pipe can be greater than the threshold voltage of T4 pipe, has occurred that T3 pipe and T4 manage not mating of electric parameter.Therefore, the gray shade scale of this pixel current just there will be deviation.
[summary of the invention]
In order to overcome the deficiencies in the prior art, the invention provides a kind of image element circuit and control method thereof of organic light emitting display, to solve the problem of driving tube threshold voltage shift.
A kind of image element circuit of organic light emitting display, comprise OLED and the driving tube that belongs to field effect transistor, the first switching tube, second switch pipe, the 3rd switching tube and the 4th switching tube that also comprise electric capacity and all belong to field effect transistor, when the control end at the first switching tube, second switch pipe, the 3rd switching tube, the 4th switching tube and driving tube applies high level, the first switching tube, second switch pipe, the 3rd switching tube, the 4th switching tube and driving tube are in conducting state;
The anode of described OLED is connected with the first current lead-through end of power supply and the first switching tube respectively with negative electrode, the first current lead-through end of described driving tube is connected with the second current lead-through end of described second switch pipe, the first current lead-through end of the 3rd switching tube and the second current lead-through end of the first switching tube respectively, and the second current lead-through end of described driving tube is connected with ground;
The first current lead-through end of described second switch pipe is connected with signal input part, the first current lead-through end of described the 4th switching tube is connected with ground with the second current lead-through end of described the 3rd switching tube respectively with the second current lead-through end, and described capacitance series is between the first current lead-through end of the second control signal end and the 4th switching tube;
Described the first control signal end is connected with the control end of the first switching tube, and described the first sweep signal end is connected with the control end of the 4th switching tube, and described the second sweep signal end is connected with the control end of the 3rd switching tube with the control end of second switch pipe respectively.
Described driving tube, the first switching tube, second switch pipe, the 3rd switching tube and the 4th switching tube are all thin film transistor (TFT) TFT.
Above-mentioned thin film transistor (TFT) can adopt: any one in metal-oxide-semiconductor field effect transistor, amorphous silicon film transistor, polycrystalline SiTFT, metal oxide thin-film transistor or OTFT.
A kind of image element circuit of organic light emitting display, comprise the first switching tube, second switch pipe, the 3rd switching tube and the 4th switching tube that OLED and the driving tube that belongs to field effect transistor also comprise electric capacity and all belong to field effect transistor;
The anode of described OLED is connected with the first current lead-through end of power supply and the first switching tube respectively with negative electrode, the first current lead-through end of described driving tube is connected with the second current lead-through end of described second switch pipe, the first current lead-through end of the 3rd switching tube and the second current lead-through end of the first switching tube respectively, and the second current lead-through end of described driving tube is connected with ground;
The first current lead-through end of described second switch pipe is connected with signal input part, the first current lead-through end of described the 4th switching tube is connected with the second control signal end with the control end of described driving tube respectively with the second current lead-through end, the second current lead-through end of described the 3rd switching tube is connected with the control end of driving tube, and described capacitance series is between the control end of the second control signal end and driving tube;
Described the first control signal end is connected with the control end of the first switching tube, and described the first sweep signal end is connected with the control end of the 4th switching tube, and described the second sweep signal end is connected with the control end of the 3rd switching tube with the control end of second switch pipe respectively.
Also comprise the 5th switching tube and the 6th switching tube, the first current lead-through end of described the 5th switching tube all is connected with power supply with control end, the second current lead-through end of described the 5th switching tube is as described the first control signal end, the first current lead-through end of described the 6th switching tube is connected with ground with the second current lead-through end of the 5th switching tube respectively with the second current lead-through end, and the control end of described the 6th switching tube is connected with described the first sweep signal end.
Described driving tube, the first switching tube, second switch pipe, the 3rd switching tube, the 4th switching tube, the 5th switching tube and the 6th switching tube are all TFT.
A kind of image element circuit control method of organic light emitting display, adopt the image element circuit of described organic light emitting display, and one-period comprises reseting stage, address phase and glow phase, comprises the steps:
At reseting stage: to the first sweep signal end and the first control signal end input high level, to the second sweep signal end and the second control signal end input low level;
In address phase: to the first sweep signal end and the first control signal end input low level, to the second sweep signal end and the second control signal end input high level, to the signal input part current input signal;
In glow phase: to the first sweep signal end and the second sweep signal end input low level, to first signal control end and secondary signal control end input high level.
The image element circuit of this organic light emitting display can be by the compensation effectively realized the driving tube threshold voltage shift, thereby has reached the purpose of reproducing signals electric current (marking current being copied to the drive current that becomes OLED); And at reseting stage and address phase, all do not have electric current to flow through OLED, thereby can improve the contrast of display screen; Further, grid voltage by the control driving tube is negative value at reseting stage, realize the negative sense biasing of driving tube, thereby reduce the threshold voltage shift amount of driving tube, further reduce the error occurred between OLED drive current and marking current in the larger situation of marking current; In addition, the present invention can also improve the driving force of TFT driving tube (because ideally, the electric current of OLED should equal marking current I
dATAbut, in the current mode driving circuit, can only infinite approach I
dATA, this circuit is in address phase, marking current I
dATAwhen duration of charging of capacitor C s is also started to address phase, the grid voltage VA0 of driving tube T1 is relevant, and VA0 is by V
h2determine.The value that can suitably increase VH2 shortens marking current I
dATAto the duration of charging of capacitor C s, make in limited time range more approach signal electric current.）
[accompanying drawing explanation]
Fig. 1 is the image element circuit figure of active driving organic light emitting display in prior art;
Fig. 2 is the image element circuit figure of the active driving organic light emitting display of an embodiment of the present invention;
Fig. 3 is the driving sequential chart of the image element circuit of Fig. 2;
Fig. 4 is the image element circuit figure of the active driving organic light emitting display of another embodiment of the present invention;
Fig. 5 is the driving sequential chart of the image element circuit of Fig. 4;
Fig. 6 is the image element circuit figure of the active driving organic light emitting display of another embodiment of the present invention.
[embodiment]
Below with reference to accompanying drawing, specific embodiments of the invention are described in further detail.
As shown in Figure 2, the image element circuit of the organic light emitting display of a kind of embodiment, comprise: OLED, memory capacitance Cs, the first switch transistor T 3, second switch pipe T2, the 3rd switch transistor T 4, the 4th switch transistor T 5 and driving tube T1, wherein the first switch transistor T 3, second switch pipe T2, the 3rd switch transistor T 4, the 4th switch transistor T 5 and driving tube T1 are N-type a-Si:H TFT, when the control end of these TFT applies high level, these TFT conductings, when the control end of these TFT applies low level, these TFT cut-offs.
The grid of driving tube T1 is connected with the source electrode of the 3rd switch transistor T 4 with the end of capacitor C s, the drain electrode of the 4th switch transistor T 5 respectively, the source ground of driving tube T1, the drain electrode of driving tube T1 is connected with the open the light source electrode of pipe T3 of the drain electrode and first of the source electrode of second switch pipe T2, the 3rd switch transistor T 4 respectively;
The drain electrode of second switch pipe T2 is connected to signal wire (signal input part) Idata, and the grid of second switch pipe T2 is connected with the grid of the 3rd switch transistor T 4 and is connected to the sweep trace that N is capable (the second sweep signal end); The grid of the first switch transistor T 3 is connected to control line (the first control signal end) EMS, and the drain electrode of the first switch transistor T 3 is connected with the negative electrode of OLED; The anodic bonding of OLED is to constant voltage source VDD; The source ground of the 4th switch transistor T 5, the grid of the 4th switch transistor T 5 is connected to the sweep trace that N-1 is capable (the first sweep signal end); The other end of capacitor C s is connected to control line (the second control signal end) BST.
On above-mentioned pixel-driving circuit basis, the present invention also provides the driving control method of this image element circuit.Fig. 3 is that sequential chart is controlled in the driving of circuit shown in Fig. 2.
Each cycle of driving OLED is divided three phases: reseting stage, address phase and glow phase are specifically described this driving method below in conjunction with Fig. 2 and Fig. 3.
Reseting stage: when scanning N-1 when capable, N-1 line scan signals SCAN (N-1) is high level V
gH, and N line scan signals SCAN (N) and the first control signal EMS keep respectively low level V
gLwith high level V
gH, the 4th switch transistor T 5 pipes are opened.As the pulse signal BST of the second control signal by high level V
h1become low level V
l1, the grid A point voltage of driving tube T1 pipe is extremely zero through the 4th switch transistor T 5 tube discharges.Low level V no matter
l1size, at reseting stage, driving tube T1 manages in zero bias condition, the electric current of the OLED that flows through is zero.
Address phase: N-1 line scan signals SCAN (N-1) becomes low level V
gL, and N line scan signals SCAN (N) and the second control signal EMS become respectively high level V
gHwith low level V
gL, the first switch transistor T 3 pipes and the 4th switch transistor T 5 pipes are closed, and the 3rd switch transistor T 4 and second switch pipe T2 pipe are opened.The second control signal BST is by low level V
l1become high level V
h1, the grid voltage VA0 of driving tube T1 becomes V
h1-V
l1.Marking current I on signal wire Idata
dATAthrough 4 pairs of capacitor C s chargings of second switch pipe T2 and the 3rd switch transistor T, when the electric current of the 3rd switch transistor T 4 is zero and the electric current of driving tube T1 is I
dATAthe time, the charging process of capacitor C s finishes.Now the grid potential of driving tube T1 is all identical, is all
wherein, I
dATAfor marking current, (W/L)
t1the ratio that means the wide and length of driving tube T1, μ
fETthe field-effect mobility that means driving tube T1, C
siNxmean the capacitive dielectric layer of driving tube T1, α is scale factor, V
tHthreshold voltage for driving tube T1.Due to the first switch transistor T 3, in closed condition, therefore in the programming address phase, do not have electric current to flow through OLED.
Glow phase: N-1 line scan signals SCAN (N-1) keeps low level V
gL, and N line scan signals SCAN (N) and the first control signal EMS become respectively low level V
gLwith high level V
gH, second switch pipe T2, the 3rd switch transistor T 4 and the 4th switch transistor T 5 are in closed condition, and the first switch transistor T 3 is opened.Because the pulse signal BST of the second control signal keeps corresponding high level V
h1, and capacitor C s do not have discharge loop, and the grid voltage of driving tube T1 can remain
until reseting stage next time.Therefore the drain current of driving tube T1 is I
t1=0.5 (W/L)
t1μ
fETc
siNxα (V
a-V
tH)
2=I
dATAthereby, realized the compensation to driving tube T1 threshold voltage shift, reached the reproducing signals electric current I
dATApurpose.
In address phase, marking current I
dATAto duration of charging of capacitor C s except with Cs, I
dATAand, outside the Pass the characteristic of driving tube T1 phase, while also starting to address phase, the grid voltage VA0 of driving tube T1 is relevant, and VA0 is by V
h2determine.At T1 pipe parameter, Cs and I
dATAunder known condition, the value that can suitably increase VA0 shortens marking current I
dATAto the duration of charging of capacitor C s, particularly as marking current I
dATAhour all the more so.
Known according to the principle of work of image element circuit, at reseting stage, circuit shown in Fig. 2 has been realized the zero offset of driving tube T1.When display screen is in running order, driving tube T1 works in the forward bias state.Due under the forward bias state, forward bias can occur in the threshold voltage of driving tube T1, and its drift value is the function of working time and gate bias voltage.After threshold voltage drifts about, for larger marking current I
dATA, at the address phase driving tube, T1 works in saturation region, and, in glow phase, driving tube T1 may work in linear zone.Still may cause in this case OLED drive current and marking current I
dATAlarger error.
With reference to Fig. 4, it is the schematic diagram of another embodiment of image element circuit of organic light emitting display of the present invention.
The invention provides a kind of current-driven pixel circuit, comprised equally five N-type a-Si:H TFT and 1 memory capacitance Cs and an OLED.Different with embodiment mono-: the source electrode of the 4th switch transistor T 5 is connected with the other end of capacitor C s, and is connected to control line BST simultaneously.
On above-mentioned pixel-driving circuit basis, the present invention also provides the driving method of this image element circuit.Fig. 5 is the driving sequential chart of circuit shown in Fig. 4.
Below in conjunction with Fig. 4 and Fig. 5, a minute three phases is specifically described this driving method.
Reseting stage: when scanning N-1 when capable, N-1 line scan signals SCAN (N-1) is high level V
gH, and N line scan signals SCAN (N) and the first control signal EMS keep respectively low level V
gLwith high level V
gH, the 4th switch transistor T 5 is opened.Pulse signal BST is by high level V
h2become low level V
l2.
Choose the low level V of suitable size
l2, can make the grid voltage of driving tube T1 is negative value in this stage, realizes the negative sense biasing of driving tube T1.At reseting stage, the electric current of the OLED that flows through is zero.
Address phase: address phase: N-1 line scan signals SCAN (N-1) becomes low level V
gL, and N line scan signals SCAN (N) and the first control signal EMS become respectively high level V
gHwith low level V
gL, the first switch transistor T 3 and the 4th switch transistor T 5 are closed, and the 3rd switch transistor T 4 and second switch pipe T2 are opened.The second control signal BST signal is all by low level V
l2become high level V
h2, the grid voltage VA0 of driving tube T1 finally becomes high level V
h2.Marking current I
dATAthrough second switch pipe T2 pipe and 4 pairs of capacitor C s chargings of the 3rd switch transistor T, until the electric current of the 3rd switch transistor T 4 is zero and the electric current of driving tube T1 is I
dATAtill.Due to the first switch transistor T 3, in closed condition, therefore in address phase, do not have electric current to flow through OLED.The grid potential of driving tube T1 pipe is
Glow phase: N-1 line scan signals SCAN (N-1) keeps low level V
gL, and N line scan signals SCAN (N) and the first control signal EMS become respectively low level V
gLwith high level V
gH, second switch pipe T2, the 3rd switch transistor T 4 and the 4th switch transistor T 5 are in closed condition, and the first switch transistor T 3 is opened.Because pulse signal BST keeps corresponding high level V
h2, and capacitor C s do not have discharge loop, it is constant until reseting stage next time that the grid voltage of driving tube T1 pipe can keep.
At this moment, the drain current of driving tube T1 is
I
T1=0.5·(W/L)
T1·μ
FET·C
SiNx·α·(V
A-V
TH)
2=I
DATA
Thereby realized the compensation to driving tube T1 threshold voltage shift, reached the duplicate current signal electric current I
dATApurpose.
In address phase, the 3rd switch transistor T 4 works in linear zone, marking current I
dATAto duration of charging of capacitor C s except with Cs, I
dATAand, outside the Pass the characteristic of driving tube T1 phase, while also starting to address phase, the grid voltage VA0 of driving tube T1 is relevant, and VA0 is by V
h2determine.At driving tube T1 parameter, Cs and I
dATAunder known condition, can suitably increase V
h2value shorten marking current I
dATAto the duration of charging of capacitor C s, particularly as marking current I
dATAhour more necessary.
When display screen is in running order, driving tube T1 works in the forward bias state.Due under the forward bias state, forward bias can occur in the threshold voltage of driving tube T1, and its drift value is the function of working time and gate bias voltage.For the pixel-driving circuit shown in Fig. 4, realized the negative sense biasing of driving tube T1 at reseting stage, this can effectively reduce the drift value of the threshold voltage of driving tube T1, can effectively avoid last situation about running into.
As organic light-emitting display device picture element circuit embodiments three of the present invention, because control signal SCAN (N) is just in time contrary on sequential with EMS, therefore can merge sweep trace SCAN (N) and control line EMS by the reverser based on the 5th switch transistor T 10 and 20 two TFT of the 6th switch transistor T, as shown in Figure 6, thus reduce the quantity of the external control line of unit pixel.
Wherein, the grid of the 5th switch transistor T 10 all is connected with constant voltage power vd D with drain electrode, the drain electrode of the 5th switch transistor T 10 is connected with the grid of the first switch transistor T 3, the source electrode of the 6th switch transistor T 20 is connected with the grid of the first switch transistor T 3 with ground respectively with drain electrode, N-1 line scan signals SCAN (N-1) is connected with the grid of the 6th switch transistor T 20, and the source electrode of the 5th switch transistor T 10 is as the lead-out terminal of the first control signal EMS.
Claims (6)
1. the image element circuit of an organic light emitting display, comprise OLED and the driving tube that belongs to field effect transistor, it is characterized in that: the first switching tube, second switch pipe, the 3rd switching tube and the 4th switching tube that also comprise electric capacity and all belong to field effect transistor, when the control end at the first switching tube, second switch pipe, the 3rd switching tube, the 4th switching tube and driving tube applies high level, the first switching tube, second switch pipe, the 3rd switching tube, the 4th switching tube and driving tube are in conducting state;
The anode of described OLED is connected with the first current lead-through end of power supply and the first switching tube respectively with negative electrode, the first current lead-through end of described driving tube is connected with the second current lead-through end of described second switch pipe, the first current lead-through end of the 3rd switching tube and the second current lead-through end of the first switching tube respectively, and the second current lead-through end of described driving tube is connected with ground;
The first current lead-through end of described second switch pipe is connected with signal input part, the first current lead-through end of described the 4th switching tube is connected with ground with the second current lead-through end of described the 3rd switching tube respectively with the second current lead-through end, and described capacitance series is between the first current lead-through end of the second control signal end and the 4th switching tube;
Described the first control signal end is connected with the control end of the first switching tube, and described the first sweep signal end is connected with the control end of the 4th switching tube, and described the second sweep signal end is connected with the control end of the 3rd switching tube with the control end of second switch pipe respectively.
2. the image element circuit of organic light emitting display as claimed in claim 1, it is characterized in that: described driving tube, the first switching tube, second switch pipe, the 3rd switching tube and the 4th switching tube are all TFT.
3. the image element circuit of an organic light emitting display, comprise OLED and the driving tube that belongs to field effect transistor, it is characterized in that: the first switching tube, second switch pipe, the 3rd switching tube and the 4th switching tube that also comprise electric capacity and all belong to field effect transistor;
The anode of described OLED is connected with the first current lead-through end of power supply and the first switching tube respectively with negative electrode, the first current lead-through end of described driving tube is connected with the second current lead-through end of described second switch pipe, the first current lead-through end of the 3rd switching tube and the second current lead-through end of the first switching tube respectively, and the second current lead-through end of described driving tube is connected with ground;
The first current lead-through end of described second switch pipe is connected with signal input part, the first current lead-through end of described the 4th switching tube is connected with the second control signal end with the control end of described driving tube respectively with the second current lead-through end, the second current lead-through end of described the 3rd switching tube is connected with the control end of driving tube, and described capacitance series is between the control end of the second control signal end and driving tube;
Described the first control signal end is connected with the control end of the first switching tube, and described the first sweep signal end is connected with the control end of the 4th switching tube, and described the second sweep signal end is connected with the control end of the 3rd switching tube with the control end of second switch pipe respectively.
4. the image element circuit of organic light emitting display as claimed in claim 3, it is characterized in that: also comprise the 5th switching tube and the 6th switching tube, the first current lead-through end of described the 5th switching tube all is connected with power supply with control end, the second current lead-through end of described the 5th switching tube is as described the first control signal end, the first current lead-through end of described the 6th switching tube is connected with ground with the second current lead-through end of the 5th switching tube respectively with the second current lead-through end, and the control end of described the 6th switching tube is connected with described the first sweep signal end.
5. the image element circuit of organic light emitting display as claimed in claim 4 is characterized in that:
Described driving tube, the first switching tube, second switch pipe, the 3rd switching tube, the 4th switching tube, the 5th switching tube and the 6th switching tube are all TFT.
6. the image element circuit control method of an organic light emitting display, is characterized in that, adopts the image element circuit as the arbitrary described organic light emitting display of claim 1 to 5, and one-period comprises reseting stage, address phase and glow phase, comprises the steps:
At reseting stage: to the first sweep signal end and the first control signal end input high level, to the second sweep signal end and the second control signal end input low level;
In address phase: to the first sweep signal end and the first control signal end input low level, to the second sweep signal end and the second control signal end input high level, to the signal input part current input signal;
In glow phase: to the first sweep signal end and the second sweep signal end input low level, to first signal control end and secondary signal control end input high level.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018176556A1 (en) * | 2017-03-31 | 2018-10-04 | 深圳市华星光电半导体显示技术有限公司 | Driving circuit and liquid crystal display device |
| CN110930947A (en) * | 2019-11-28 | 2020-03-27 | 武汉华星光电半导体显示技术有限公司 | Pixel compensation circuit, driving method thereof and display device |
| CN111710298A (en) * | 2020-06-28 | 2020-09-25 | 云谷（固安）科技有限公司 | Pixel circuit, driving method thereof and display panel |
| CN115547254A (en) * | 2022-12-01 | 2022-12-30 | 惠科股份有限公司 | Pixel driving circuit, pixel driving method and display panel |
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| CN1427382A (en) * | 2001-12-18 | 2003-07-02 | 三洋电机株式会社 | Display device having initalzing function to brightness data of optical element |
| US20050093464A1 (en) * | 2003-10-29 | 2005-05-05 | Dong-Yong Shin | Light-emitting display, driving method thereof, and light-emitting display panel |
| CN1713257A (en) * | 2004-06-25 | 2005-12-28 | 京瓷株式会社 | Image display apparatus and method of driving same |
| CN102789761A (en) * | 2012-08-06 | 2012-11-21 | 京东方科技集团股份有限公司 | Pixel circuit, driving method thereof and organic light emitting display |
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| CN103021332A (en) * | 2012-12-04 | 2013-04-03 | 彩虹（佛山）平板显示有限公司 | Driving system for display |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2018176556A1 (en) * | 2017-03-31 | 2018-10-04 | 深圳市华星光电半导体显示技术有限公司 | Driving circuit and liquid crystal display device |
| CN110930947A (en) * | 2019-11-28 | 2020-03-27 | 武汉华星光电半导体显示技术有限公司 | Pixel compensation circuit, driving method thereof and display device |
| CN111710298A (en) * | 2020-06-28 | 2020-09-25 | 云谷（固安）科技有限公司 | Pixel circuit, driving method thereof and display panel |
| CN111710298B (en) * | 2020-06-28 | 2022-01-25 | 云谷（固安）科技有限公司 | Pixel circuit, driving method thereof and display panel |
| CN115547254A (en) * | 2022-12-01 | 2022-12-30 | 惠科股份有限公司 | Pixel driving circuit, pixel driving method and display panel |
| CN115547254B (en) * | 2022-12-01 | 2023-03-10 | 惠科股份有限公司 | Pixel driving circuit, pixel driving method and display panel |
| US11908411B1 (en) | 2022-12-01 | 2024-02-20 | HKC Corporation Limited | Display panel and pixel driving method |
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| CN103440841B (en) | 2015-11-18 |
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