CN101996579A - Pixel driving circuit and method of active organic electroluminescent display - Google Patents

Pixel driving circuit and method of active organic electroluminescent display Download PDF

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CN101996579A
CN101996579A CN2010105224091A CN201010522409A CN101996579A CN 101996579 A CN101996579 A CN 101996579A CN 2010105224091 A CN2010105224091 A CN 2010105224091A CN 201010522409 A CN201010522409 A CN 201010522409A CN 101996579 A CN101996579 A CN 101996579A
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transistor
connected
control line
voltage
storage capacitor
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CN2010105224091A
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吴为敬
周雷
彭俊彪
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华南理工大学
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Abstract

The invention discloses pixel driving circuit and method of an active organic electroluminescent display. The pixel driving circuit comprises a driving transistor, four switch transistors, a coupling capacitor, a storage capacitor and a light-emitting diode, wherein a drain electrode of the first transistor is connected with a data wire, a grid electrode of the first transistor is connected with a first scanning control wire, and a source electrode of the first transistor is connected with the C end of the coupling capacitor; a drain electrode of the second transistor is connected with source electrodes of the third transistor and the fourth transistor, a grid electrode of the second transistor is connected with the A ends of the coupling capacitor and the storage capacitor and a drain electrode of the third transistor, and a source electrode of the second transistor is connected with a drain electrode of the fifth transistor and the B end of the storage capacitor and is grounded through the organic light-emitting diode; a grid electrode of the third transistor is connected with a second scanning control wire; a drain electrode of the fourth transistor is connected with a power wire, and a grid electrode of the fourth transistor is connected with a light-emitting control wire; and a grid electrode of the fifth transistor is connected with the first scanning control wire, and a source electrode is grounded. The invention can effectively compensate the unevenness of threshold voltages of the transistors and the degradation of a start voltage of the OLED (Organic Light Emitting Diode), ensures that the brightness of an image displayed by the OLED is even and realizes high contrast.

Description

有源有机电致发光显示器的像素驱动电路及其驱动方法 Active pixel drive circuit and a driving method of an organic electroluminescent display

技术领域 FIELD

[0001] 本发明涉及发光二极管显示器的像素驱动技术,尤其涉及有源有机电致发光显示器的像素驱动电路及其驱动方法。 [0001] The present invention relates to a pixel driving light emitting diode display technology, in particular, it relates to an active pixel of an organic electroluminescent display driving circuit and a driving method.

背景技术 Background technique

[0002] 有机发光二极管OLED显示器具有体积小,自主发光、可视角度大、响应时间短,制作成本低廉等优点,吸引了越来越多研究人员的参与。 [0002] The organic light emitting diode OLED display has a small volume, independent light, viewing angle, a short response time, low manufacturing cost, etc., to attract a growing number of researchers involved in. 无源驱动方式要求OLED发光器件的效率和亮度很高,高电压或电流的脉冲驱动方式使发光器件的工作效率很低且降低了OLED 的使用寿命,并且无法满足高分辨率和大信息量显示的要求。 Passive driving method of the light emitting device OLED in claim efficiency and high brightness, a high voltage pulse drive mode or the current efficiency of the light emitting device causes the low and reduces the life of the OLED, and can not meet the high resolution and a large amount of information displayed requirements. 对于大屏幕高分辨率显示,通常采用有源驱动方式。 For large-screen high-resolution display, active matrix driving is typically employed.

[0003] 目前,应用于有源OLED的薄膜晶体管主要有非晶硅薄膜晶体管(a-Si TFT)和多晶硅薄膜晶体管(Poly-Si TFT)。 [0003] At present, a thin film transistor applied to an active OLED mainly amorphous silicon thin film transistors (a-Si TFT) and a polysilicon thin film transistor (Poly-Si TFT). a-Si TFT载流子迁移率低,器件的尺寸要比Poly-Si TFT 大得多,而且驱动电压和信号电压都比较大,这些不利因素会造成显示屏像素开口率下降、 OLED的寿命缩短。 a-Si TFT carrier mobility is low, than the size of the Poly-Si TFT device is much greater, but the driving voltage and the signal voltage are large, these negative factors cause the display pixel aperture ratio decrease, shortening the lifetime of the OLED . Poly-Si TFT具有较高的载流子迁移率,相比于非晶硅工艺,其器件尺寸可以做到更小,增加了OLED像素的开口率,还可以实现将显示器的外围驱动电路集成于显示器的周边。 Poly-Si TFT having high carrier mobility compared to amorphous silicon technology, which can achieve a smaller device size, increasing the aperture ratio of the pixel OLED can also be achieved in the peripheral driving circuit integrated display surrounding the display. 基于Poly-Si TFT的有源驱动OLED技术成为未来OLED显示驱动的发展方向。 Based on Poly-Si TFT active drive OLED technology and OLED display driver of the future direction of development.

[0004] 在实际的生产中,目前的工艺水平很难保证各个像素中的驱动管TFT的阈值电压相同。 [0004] In the actual production, the present process is difficult to ensure the same level of the threshold voltage of the driving TFT of the tube in each pixel. 在传统的两管单元驱动方案中,由于各个像素驱动晶体管的阈值电压的不均勻性将导致整个显示屏亮度的不均勻性。 In a conventional two unit driving scheme, since the unevenness of the threshold voltage of the driving transistor of each pixel of the entire display screen will result in uneven brightness. 另外随着工作时间的增加,驱动晶体管的阈值电压也会随之升高,OLED的退化也会引起自身开启电压的升高,从而引起显示屏亮度的下降。 Also with increasing operating time, the threshold voltage of the driving transistor will also increase, degradation of the OLED itself can cause open voltage increases, causing a decline in screen brightness. 为了补偿各个像素点驱动TFT阈值电压的不均勻性,人们提出了许多补偿方案。 In order to compensate for unevenness of each pixel driving TFT threshold voltage compensation schemes have been proposed many. 这些方案主要可分为电流编程型和电压编程型。 These programs can be divided into type current programming and voltage programming type. 一般来讲,电流编程型像素驱动电路在低灰阶显示时需要很长的充电时间,从而影响了其在大屏幕高分辨率显示器中的使用。 In general, a current-programmed type pixel driving circuit requires a very long charging time at low gray scale display, thus affecting its use in large-screen high-resolution display. 在电压编程型像素驱动电路中,初始化阶段会有一股很大的电流对存储电容以及OLED本身的等效电容充电, 所以能够大大的减少充电时间。 In the voltage-programmed type pixel driving circuit, there is an initialization phase the equivalent capacitance of the large current charging the storage capacitor and an OLED itself, it is possible to greatly reduce the charging time. 因此近年来对电压编程型像素驱动的研究吸引了越来越多研究人员的参与。 Therefore, research in recent years on the voltage programming type pixel driving attracted the participation of more and more researchers.

发明内容 SUMMARY

[0005] 本发明的目的在于克服上述现有技术的缺点和不足,提供有源有机电致发光显示器的像素驱动电路,不仅可以有效解决有源矩阵OLED显示器中各个像素点驱动TFT阈值电压的不均勻性,还可以解决OLED开启电压退化的问题,从而使得OLED显示器发光亮度均勻。 [0005] The object of the present invention is to overcome the above disadvantages and drawbacks of the prior art, providing an active organic electroluminescent display pixel driving circuit, not only can effectively solve the driving TFT of each pixel in the threshold voltage of an active matrix OLED display is not uniformity, may also solve the problem of voltage turn OLED degradation, so that a uniform light emission brightness of the OLED display.

[0006] 本发明的另一目的在于提供上述有源有机电致发光显示器的像素驱动电路的驱动方法。 [0006] Another object of the present invention is to provide a driving method of the active pixel driving circuit of an organic electroluminescent display.

[0007] 本发明的目的通过下述方案实现: [0007] The object of the present invention is achieved by the following scheme:

[0008] 有源有机电致发光显示器的像素驱动电路,该驱动电路包括:[0009] 第一晶体管:其漏极接数据线,栅极接第一扫描控制线,源极接耦合电容的C端, 所述第一晶体管控制耦合电容为第二晶体管的栅极写入灰度数据电压; [0008] The active organic electroluminescent display pixel driving circuit, the driving circuit comprising: [0009] a first transistor: a drain connected to a data line, a control gate connected to a first scan line, a source connected to the coupling capacitance C end of the first transistor control gate of the second transistor coupling capacitor gradation data write voltages;

[0010] 第二晶体管:其漏极接第三和第四晶体管的源极,栅极接耦合电容和存储电容的A端以及第三晶体管的漏极,源极接第五晶体管的漏极以及存储电容的B端,并通过有机发光二极管与地线相连,所述第二晶体管驱动OLED发光; [0010] The second transistor: a third and a source connected to a drain of the fourth transistor, a gate connected to the drain terminal A coupling capacitor and a storage capacitor and a third transistor, a source connected to the drain of the fifth transistor and the B terminal of the storage capacitor and is connected to the ground through the organic light emitting diode, the second light emitting OLED driving transistor;

[0011 ] 第三晶体管:其栅极接第二扫描控制线,所述第三晶体管,通过第四晶体管提供充电通路,通过第二晶体管提供放电通路; [0011] The third transistor: a gate connected to a second scan control line, said third transistor, a fourth transistor by providing a charging path, provides a discharge path through the second transistor;

[0012] 第四晶体管:其漏极接电源线,栅极接发光控制线,所述第四晶体管,通过第三晶体管控制充电通路,通过第二晶体管控制OLED发光; [0012] The fourth transistor: a drain connected to the power supply line, a gate connected to the emission control line, the fourth transistor, the third transistor controlling the charging path of the second transistor by controlling a light emitting OLED;

[0013] 第五晶体管:其栅极接第一扫描控制线,源极接地线,所述第五晶体管,提供放电通路,避免OLED在阈值电压存储阶段发光。 [0013] The fifth transistor: the gate thereof connected to the first scan control line, a ground line source, said fifth transistor, provides a discharge path to prevent the threshold voltage of the light emitting OLED storage phase.

[0014] 上述第一晶体管、第二晶体管、第三晶体管、第四晶体管和第五晶体管,为多晶硅薄膜晶体管、非晶硅薄膜晶体管、氧化锌基薄膜晶体管或有机薄膜晶体管中的任意一种晶体管。 [0014] The first transistor, second transistor, a third transistor, the fourth and fifth transistors, polysilicon thin-film transistors, amorphous silicon thin film transistor, a zinc oxide-based thin-film transistor or organic thin film transistor of any one of transistors .

[0015] 像素驱动电路工作时,第一晶体管、第三晶体管、第四晶体管和第五晶体管均工作于线性区,起驱动作用的第二晶体管工作在饱和区。 When [0015] the pixel driving circuit, a first transistor, a third transistor, the fourth transistor and the fifth transistor are operating in linear region, drivingly second transistor operates in a saturation region. 上述有源有机电致发光显示器的像素驱动电路的驱动方法,包括下列步骤: The active driving method of driving the pixel circuit of the organic electroluminescent display, comprising the steps of:

[0016] 重置阶段:第一扫描控制线、第二扫描控制线以及发光控制线处于高电平,电流通过第三晶体管和第四晶体管对A点重新充电; [0016] Reset stages: a first scanning control line, the second scan lines and emission control lines control at a high level, the current recharges the point A through the third transistor and a fourth transistor;

[0017] 阈值电压存储阶段:第一扫描控制线、第二扫描控制线依然保持原来的高电平,发光控制线跳至低电平,A点电位通过第三晶体管、第二晶体管和第五晶体管放电至第二晶体管的阈值电压; [0017] The threshold voltage of the memory stages: a first scanning control line, a second scan the original control line remains high, the light emission control line jumps to the low level, A point potential via a third transistor, a second transistor and a fifth a discharge threshold voltage of the transistor to the second transistor;

[0018] 灰度数据电压写入阶段:第一扫描控制线为高电平,第二扫描控制线和发光控制线为低电平,数据电压通过耦合电容写入到第二晶体管的栅极A点; [0018] The voltage gradation data writing stage: a first scanning control line is high, the second scan line and a control light emission control line is low, data is written into the coupling capacitor voltage through the second transistor gate A point;

[0019] OLED发光阶段:第一扫描控制线、第二扫描控制线为低电平,发光控制线为高电平,第二晶体管驱动OLED发光,储存电容两端的电压差保持不变,即A点与B点的电压差保持不变; [0019] OLED emits light phases: a first scanning control line, a second scanning control line is low, the light emission control line is high, the second OLED light emitting driving transistor, the voltage difference across the storage capacitor remains unchanged, i.e., A the voltage difference between points a and B remain unchanged;

[0020] 上述阈值电压存储阶段,储存电容存储第二晶体管的阈值电压;上述数据电压写入阶段,储存电容存储写入灰度数据电压; [0020] The threshold voltage of the storage phase, the storage capacitor stores a threshold voltage of the second transistor; and the data voltage writing phase, the storage capacitor voltage gradation data memory write;

[0021] 上述OLED发光阶段,储存电容保持其两端存储电压不变,使流过的电流恒定而不受OLED开启电压的影响。 [0021] The OLED emits light phase, the storage capacitor storing the voltage at both ends thereof held constant, a constant current flows from the OLED turn-on voltage.

[0022] 本发明与现有技术相比,优点及效果在于,(1)本发明电路简单可靠,不仅能够补偿各个像素点之间晶体管的阈值电压差异以及OLED退化造成的显示器亮度不均勻性,而且由于所采用的设计结构,使得像素点在非工作期间能够实现全黑,从而大大提高了显示器的对比度;(2)本发明采用了一个存储电容和一个耦合电容,从而使阈值电压存储与灰度数据写入分开进行,可以提高像素点阈值电压补偿的精度,适合大尺寸高分辨率显示设备。 [0022] Compared with the prior art, advantages and effects in that (1) the present invention is simple and reliable circuit, not only to compensate the difference value of the voltage threshold of the transistor and a display OLED degradation of luminance non-uniformity between individual pixels, Also due to the design configuration adopted, so that pixels during the non-operation to achieve full black, thus greatly improving the contrast of the display; (2) the present invention employs a storage capacitor and a coupling capacitance, such that the threshold voltage of the memory and gray of data writing performed separately, the precision threshold voltage compensation pixel can be improved, for high-resolution large-size display apparatus.

附图说明 BRIEF DESCRIPTION

[0023] 图1是本发明的有源有机电致发光显示器的像素驱动电路原理图;图中:第一晶体管Tl、第二晶体管T2、第三晶体管T3、第四晶体管T4、第五晶体管T5、耦合电容Cl、存储电容C2、第一扫描控制线Vscanl、第二扫描控制线VsCan2、发光控制线Vems、电源线VddJiil 线Vss、数据线Vdata、有机发光二极管OLED。 [0023] FIG. 1 is an active principle of the present invention is a circuit diagram of a pixel driving organic electroluminescent display; FIG: a first transistor Tl, a second transistor T2, third transistor T3, a fourth transistor T4, a fifth transistor T5 coupling capacitor Cl, the storage capacitor C2, a first control line scan Vscanl, a second scan control line VsCan2, VEMS emission control line, the power supply line Vss VddJiil line, the data line Vdata, the organic light emitting diode OLED.

[0024] 图2是图1的信号时序图。 [0024] FIG 2 is a signal timing diagram of FIG.

具体实施方式 Detailed ways

[0025] 下面结合实施例及附图对本发明作进一步详细说明,但本发明的实施方式不限于此。 [0025] further below in conjunction with the accompanying drawings and the detailed description of embodiments of the present invention will be, but the embodiment of the present invention is not limited thereto.

[0026] 实施例 [0026] Example

[0027] 如图1所示,本发明有源有机电致发光显示器的像素驱动电路包括,第一晶体管Tl、第二晶体管T2、第三晶体管T3、第四晶体管T4、第五晶体管T5、耦合电容Cl、存储电容C2、第一扫描控制线Vscanl、第二扫描控制线VsCan2、发光控制线Vems、电源线Vdd、地线Vss、数据线Vdata、有机发光二极管OLED。 [0027] As shown, the present invention has an active organic electroluminescent display pixel driving circuit includes a first transistor Tl, a second transistor T2, third transistor T3, a fourth transistor T4, a fifth transistor T5, coupled capacitor Cl, the storage capacitor C2, a first control line scan Vscanl, a second scan control line VsCan2, emission control lines Vems, the power supply line Vdd, the ground line Vss, the data line Vdata, the organic light emitting diode OLED.

[0028] 第一晶体管Tl,其漏极接数据线Vdata,栅极接第一扫描控制线Vscanl,源极接耦合电容Cl的C端,所述第一晶体管控制耦合电容为第二晶体管的栅极写入灰度数据电压; [0028] The first transistor Tl, a drain connected to the data line Vdata, a first gate electrode connected to the scan control line Vscanl, a source connected to the coupling terminal of the capacitor Cl is C, a capacitance of the first transistor is coupled to the control gate of the second transistor gradation data write voltage electrode;

[0029] 第二晶体管T2,其漏极接第三和第四晶体管T3、T4的源极,栅极接耦合电容Cl和存储电容C2的A端以及第三晶体管Τ3的漏极,源极接第五晶体管Τ5的漏极以及存储电容C2的B端,并通过有机发光二极管与地线Vss相连,所述第二晶体管驱动OLED发光; [0029] The second transistor T2, a drain and a source of the fourth transistor connected to the third T3, T4, the drain connected to the gate terminal of the coupling capacitors Cl and A storage capacitor C2, and a third transistor Τ3, a source connected to the drain terminal of the fifth transistor and the storage capacitor C2 B Τ5 and is connected to the ground through the organic light emitting diode and Vss, said second driving transistor OLED to emit light;

[0030] 第三晶体管Τ3,其栅极接第二扫描控制线VsCan2,所述第三晶体管,通过第四晶体管提供充电通路,通过第二晶体管提供放电通路; [0030] tau] 3 of the third transistor, a gate connected to the second scanning control line VsCan2, the third transistor, a fourth transistor by providing a charging path, provides a discharge path through the second transistor;

[0031 ] 第四晶体管T4,其漏极接电源线Vdd,栅极接发光控制线Vems,该第四晶体管,通过第三晶体管控制充电通路,通过第二晶体管控制OLED发光; [0031] The fourth transistor T4, a drain connected to the power line Vdd, a gate connected VEMS emission control line, the fourth transistor, the third transistor controlling the charging passage, the OLED emits light by controlling a second transistor;

[0032] 第五晶体管,其栅极接第一扫描控制线Vscanl,源极接地线Vss,该第五晶体管, 提供放电通路,避免OLED在阈值电压存储阶段发光。 [0032] a fifth transistor having a gate connected to a first control line scan Vscanl, the ground line Vss source, the fifth transistor, provides a discharge path to prevent the threshold voltage of the light emitting OLED storage phase.

[0033] 上述第一晶体管Tl、第二晶体管T2、第三晶体管T3、第四晶体管T4和第五晶体管T5,为多晶硅薄膜晶体管、非晶硅薄膜晶体管、氧化锌基薄膜晶体管或有机薄膜晶体管中的任意一种晶体管。 [0033] The first transistor Tl, a second transistor T2, third transistor T3, the fourth transistor T4 and the fifth transistor T5, a polycrystalline silicon thin film transistors, amorphous silicon thin film transistor, a zinc oxide-based thin-film transistor or organic thin film transistor any one transistor.

[0034] 像素驱动电路工作时,第一晶体管Tl、第三晶体管T3、第四晶体管T4和第五晶体管T5均工作于线性区,起驱动作用的第二晶体管T2工作在饱和区。 When [0034] The pixel driving circuit, a first transistor Tl, the third transistor T3, the fourth transistor T4 and the fifth transistor T5 are working in the linear region, drivingly second transistor T2 operates in a saturation region. 各信号线的输入如图2所示。 The input of each signal line 2 shown in FIG. 像素驱动电路在每一帧中有以下步骤驱动: Pixel driving circuit has the steps of driving in each frame:

[0035] 重置阶段:第一扫描控制线Vscanl、第二扫描控制线VsCan2以及发光控制线Vems 处于高电平,灰度数据电压Vdata为零。 [0035] The reset phase: a first scanning control line Vscanl, a second scan and emission control lines VsCan2 Vems control line is high, the gray scale data voltage Vdata zero. 所有的晶体管均打开,电流通过第三晶体管T3和第四晶体管T4对A点重新充电,当充电到某一固定值,同时第五晶体管T5的打开使OLED 阳极电压为零,避免了OLED在此阶段发光; All the transistors are turned on, current recharges the point A through the third transistor T3 and a fourth transistor T4, when charged to a fixed value, while the fifth transistor T5 is opened so that the anode voltage is zero OLED, OLED avoid this stage light;

[0036] 阈值电压存储阶段:第一扫描控制线Vscanl、第二扫描控制线VsCan2依然保持原来的高电平,发光控制线Vems跳至低电平,灰度数据电压Vdata为零。 [0036] The threshold voltage of the memory stages: a first scanning control line Vscanl, a second scan control line remains VsCan2 original high level, the light emission control line Vems jumps to a low level, a zero gray scale data voltage Vdata. A点电位通过第三晶体管T3、第二晶体管T2和第五晶体管T5放电至第二晶体管T2的阈值电压,同时第五晶体管T5的打开使OLED阳极电压仍然为零,避免了OLED在此阶段发光; A potential point through the third transistor T3, a second transistor T2 and the fifth transistor T5 is discharged to the threshold voltage of the second transistor T2, while the fifth transistor T5 is opened so that OLED anode voltage is still zero, to avoid the OLED emits light at this stage ;

[0037] 灰度数据电压写入阶段:第一扫描控制线Vscanl为高电平,第二扫描控制线 [0037] The voltage gradation data writing stage: a first scanning control line Vscanl high level, the second control line scan

5Vscan2和发光控制线Vems为低电平,灰度数据电压Vdata从零跳变为某一正值,灰度数据电压通过耦合电容Cl写入到第二晶体管的栅极A点,同时第五晶体管T5的打开使OLED阳极电压继续为零,避免了OLED在此阶段发光; 5Vscan2 Vems emission control line and a low level, the gradation voltage Vdata from the data jump into a zero value, point A gate electrode of the second transistor of the gradation voltage written to the data via a coupling capacitor Cl, while the fifth transistor T5 is opened to allow zero voltage continues anode of the OLED, the OLED light emitting avoided at this stage;

[0038] OLED发光阶段:第一扫描控制线Vscanl、第二扫描控制线VsCan2为低电平,发光控制线Vems为高电平,第二晶体管驱动OLED发光,储存电容两端的电压差保持不变,也就是图1中A点与B点的电压差保持不变。 [0038] OLED emits light phases: a first scanning control line Vscanl, a second scan control line VsCan2 low level, the light emission control line Vems high level, the voltage difference between the second transistor for driving the OLED emits light, the storage capacitor remains constant across the , i.e. the voltage difference between point a in FIG. 1 and the point B remains unchanged. 具体说,本阶段:第一扫描控制线Vscanl、第二扫描控制线VsCan2为低电平,发光控制线Vems为高电平,第一晶体管Tl、第三晶体管T3和第五晶体管T5均关闭,第二晶体管T2驱动OLED发光,存储电容C2两端电压差在发光阶段保持不变,从而维持OLED在一帧时间内亮度不变。 In particular, the present stage: a first scanning control line Vscanl, a second scan control line VsCan2 low level, the light emission control line Vems is high, the first transistor Tl, the third transistor T3 and the fifth transistor T5 are turned off, the second light emitting OLED driving transistor T2, the voltage across the storage capacitor C2 emission phase difference remains unchanged, thereby maintaining constant OLED luminance in one frame period.

[0039] 上述阈值电压存储阶段,像素驱动电路中的储存电容C2存储第二晶体管T2的阈值电压; [0039] The threshold voltage of the memory stage, a storage capacitor C2 stores the pixel driving circuit, the threshold voltage of the second transistor T2;

[0040] 上述灰度数据电压写入阶段,像素驱动电路中的储存电容C2存储写入灰度数据电压; [0040] The voltage gradation data writing stage, a storage capacitor C2 stores the pixel drive circuit writing gradation data voltages;

[0041 ] 上述OLED发光阶段,像素驱动电路中的储存电容C2保持其两端存储电压不变,使流过T2的电流恒定而不受OLED开启电压的影响。 [0041] The OLED lighting stage, the pixel drive circuit storage capacitor C2 stores the voltage at both ends thereof held constant, the current through T2 constant regardless OLED turn-on voltage.

[0042] 在本发明的像素驱动电路中,各个像素点的阈值电压Vth的非均勻性以及OLED的退化不会影响到发光器件OLED的亮度差异。 [0042] In the present invention, the pixel driving circuit, the non-uniformity and OLED degradation of the threshold voltage Vth of each pixel of the luminance difference does not affect the light emitting device OLED. 发光器件OLED的亮度与流过其电流大小成正比。 Brightness light emitting device OLED is proportional to the current flowing through its size. 在数据电压写入阶段,对于各像素点,其存储电容C2两端的电压差(即第二晶体管T2 In the data writing phase voltages, for each pixel, the voltage difference between both ends of the storage capacitor C2 (i.e., second transistor T2

Cl Cl

的栅源电压)已经固定在K2 = Vlh -Vdala (Vdata > 0),并且保持到下一帧。 The gate-source voltage) has been fixed to K2 = Vlh -Vdala (Vdata> 0), and held until the next frame. 对于不 For not

同像素点,阈值电压的差异性会导致存储电容C2两端的电压差不同,但是由下面的公式可以推导出流过OLED的电流确是相同的: The same pixel, the difference in threshold voltage will result in different voltage difference across the storage capacitor C2, but by the following equation can be derived current flowing through the OLED is indeed the same:

[0043] Ioled= PiVgS-VJ2 [0043] Ioled = PiVgS-VJ2

[0044] -P(y,h +-^-Vdala-VJ2 [0044] -P (y, h + - ^ - Vdala-VJ2

(γι V (Γι V

[0045] =β —~Frfaia [0045] = β - ~ Frfaia

6 [CI + C2 dalaJ 6 [CI + C2 dalaJ

1 w 1 w

[0046] 其中0= 2M"CoxT I。-为0LED发光阶段流过第二晶体管T2的电流,在其他参 [0046] where 0 = 2M "current of the second transistor T2 CoxT I.- 0LED flowing through the light emission phase, the other parameters

数不变的情况下,其大小只与Vdata有关,而与Vth及OLED的导通电压无关公式中,μ η为电子迁移率;Cra为单位面积的绝缘层电容;L和W分别为第二晶体管Τ2的沟道长度和宽度; Vth为第二晶体管Τ2的阈值电压;Vgs第二晶体管Τ2的栅源电压。 When the number of the same, with only the size Vdata, whereas the ON voltage Vth and the OLED irrespective of the formula, μ η is the electron mobility; Cra insulating layer capacitance per unit area; L and W respectively, the second a transistor channel lengths and widths of Τ2; Vth of a threshold voltage of the second transistor Τ2; gate-source voltage Vgs of the second transistor Τ2. 另外,本像素电路在非工作阶段OLED两端电压为零,所以非工作阶段像素电路可以实现全黑,从而大大提高了显示器的对比度。 Further, the voltage across this pixel circuit inoperative phase OLED zero, the non-working phase full black pixel circuit can be realized, thus greatly improving the contrast of the display.

[0047] 当然,本领域技术人员还可以对本发明上述提出的像素驱动电路结构以及驱动方式作适当变更,例如适当变更像素电路各个开关晶体管的种类(P型或者N型),将各个晶体管的源极和漏极的电连接关系互换等。 [0047] Of course, the pixel driving circuit structure and a driving method skilled in the art can also be set forth above of the present invention will be suitably changed, for example, be changed to each type of the switching transistor of the pixel circuit (P-type or N-type), the source of each transistor and a drain electrode electrically connected relation swaps.

[0048] 如上所述便可较好的实现本发明。 The present invention can achieve a better [0048] described above.

[0049] 上述实施例仅为本发明较佳的实施方式,但本发明的实施方式并不受上述实施例的限制,其他任何未背离本发明的精神实质与原理下所作的改变、修饰、替代、组合、简化,均应为等效的置换方式,都包含在本发明的保护范围之内。 [0049] The above-described embodiments are merely preferred embodiments of the present invention, but the embodiments of the present invention is not limited to the above embodiments, any other changes made to the spirit and principle of the present invention without departing from the next, modifications, substitutions , combined, simplified, should be equivalent replacement method, it is included within the scope of the present invention.

Claims (5)

  1. 有源有机电致发光显示器的像素驱动电路,其特征在于,该驱动电路包括:第一晶体管:其漏极接数据线,栅极接第一扫描控制线,源极接耦合电容的C端,所述第一晶体管控制耦合电容为第二晶体管的栅极写入灰度数据电压;第二晶体管:其漏极接第三和第四晶体管的源极,栅极接耦合电容和存储电容的A端以及第三晶体管的漏极,源极接第五晶体管的漏极以及存储电容的B端,并通过有机发光二极管与地线相连,所述第二晶体管驱动OLED发光;第三晶体管:其栅极接第二扫描控制线,所述第三晶体管,通过第四晶体管提供充电通路,通过第二晶体管提供放电通路;第四晶体管:其漏极接电源线,栅极接发光控制线,所述第四晶体管,通过第三晶体管控制充电通路,通过第二晶体管控制OLED发光;第五晶体管:其栅极接第一扫描控制线,源极接地线, The active organic electroluminescent display pixel driving circuit, wherein the driving circuit comprises: a first transistor: a drain connected to a data line, a control gate connected to a first scan line, a source connected to the coupling terminal of the capacitor C, the first transistor control gate of the second transistor coupling capacitor is grayscale data write voltage; a second transistor: a third and a source connected to a drain of the fourth transistor, a gate connected coupling capacitor and the storage capacitor a and the drain terminal of the third transistor, a source connected to the drain of the fifth transistor and the terminal B of the storage capacitor, and is connected to the ground through the organic light emitting diode, a light-emitting OLED and the second driving transistor; a third transistor: the gate thereof a second electrode connected to the scan control line, said third transistor, a fourth transistor by providing a charging path, provides a discharge path through the second transistor; and a fourth transistor: a drain connected to the power supply line, a gate connected to the emission control line, the a fourth transistor, the third transistor controlling the charging path of the second transistor by controlling a light emitting OLED; fifth transistor: the gate thereof connected to the first scan control line, a source line is grounded, 述第五晶体管,提供放电通路,避免OLED在阈值电压存储阶段发光。 Said fifth transistor, provides a discharge path to prevent the threshold voltage of the light emitting OLED storage phase.
  2. 2.根据权利要求1所述的有源有机电致发光显示器的像素驱动电路,其特征在于,所述第一晶体管、第二晶体管、第三晶体管、第四晶体管和第五晶体管,为多晶硅薄膜晶体管、 非晶硅薄膜晶体管、氧化锌基薄膜晶体管或有机薄膜晶体管中的任意一种晶体管。 The active according to claim 1 pixel driving circuit of an organic electroluminescent display, wherein the first transistor, a second transistor, a third transistor, a fourth transistor and a fifth transistor, a polysilicon film transistors, amorphous silicon thin film transistor, a zinc oxide-based thin-film transistor or organic thin film transistor of any one transistor.
  3. 3.权利要求1或2所述的有源有机电致发光显示器的像素驱动电路的驱动方法,其特征在于,包括下列步骤:重置阶段:第一扫描控制线、第二扫描控制线以及发光控制线处于高电平,电流通过第三晶体管和第四晶体管对A点重新充电;阈值电压存储阶段:第一扫描控制线、第二扫描控制线依然保持原来的高电平,发光控制线跳至低电平,A点电位通过第三晶体管、第二晶体管和第五晶体管放电至第二晶体管的阈值电压;灰度数据电压写入阶段:第一扫描控制线为高电平,第二扫描控制线和发光控制线为低电平,灰度数据电压通过耦合电容写入到第二晶体管的栅极A点;0LED发光阶段:第一扫描控制线、第二扫描控制线为低电平,发光控制线为高电平,第二晶体管驱动0LED发光,储存电容两端的电压差保持不变,即A点与B点的电压差保持不变; 1, the active or claim 2 driving method of a pixel circuit driving the organic electroluminescent display, characterized by comprising the steps of: a reset phase: a first scanning control line, the second scan, and emission control lines control line at a high level, the current recharges the point a through the third and fourth transistors; threshold voltage of the memory stages: a first scanning control line, a second scan the original control line remains high, the light emission control line jumping to a low level, a point potential via a third transistor, a second transistor and the fifth transistor is discharged to the threshold voltage of the second transistor; voltage gradation data writing stage: a first scanning control line is high, the second scan light emission control line and a control line is low, the voltage gradation data is written by capacitance coupling point a to the gate of the second transistor; 0LED emission phase: a first scanning control line, a second scanning control line is low, emission control line is high, the second driving transistor 0LED emission, the voltage difference across the storage capacitor remains unchanged, i.e., the voltage difference between point a and point B remains constant;
  4. 4.根据权利要求3所述的驱动方法,其特征在于,所述第二晶体管工作在饱和区,第一晶体管、第三晶体管、第四晶体管、第五晶体管工作在线性区。 4. The driving method according to claim 3, characterized in that said second transistor operates in a saturation region, the first transistor, a third transistor, a fourth transistor, a fifth transistor operates in a linear region.
  5. 5.根据权利要求3所述的驱动方法,其特征在于,上述阈值电压存储阶段,储存电容存储第二晶体管的阈值电压; 上述灰度数据电压写入阶段,储存电容存储写入灰度数据电压; 上述0LED发光阶段,储存电容保持其两端存储电压不变,使流过的电流恒定而不受0LED开启电压的影响。 The driving method according to claim 3, characterized in that the threshold voltage of the threshold voltage of the memory stage, a storage capacitor storing the second transistor; and the gray-scale data voltage writing phase, the storage capacitor voltage gradation data memory write ; Effects of the above-described light emitting 0LED stage, holding both ends of the storage capacitor storing the voltage unchanged, so that a constant current flows regardless 0LED turn-on voltage.
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Cited By (46)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102364568A (en) * 2011-06-27 2012-02-29 昆山工研院新型平板显示技术中心有限公司 Pixel cell circuit of AMOLED (active matrix/organic light emitting diode) and organic light-emitting display device
CN102651192A (en) * 2011-06-21 2012-08-29 京东方科技集团股份有限公司 Active matrix/organic light emitting diode and driving circuit and method thereof
CN102651195A (en) * 2011-09-14 2012-08-29 京东方科技集团股份有限公司 OLED (Organic Light Emitting Diode) pixel structure for compensating light emitting nonuniformity and driving method
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WO2013139127A1 (en) * 2012-03-19 2013-09-26 京东方科技集团股份有限公司 Amoled driving circuit, amoled driving method, and amoled display device
WO2013166827A1 (en) * 2012-05-10 2013-11-14 北京京东方光电科技有限公司 Pixel driving circuit and driving method thereof, array substrate, and display device
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CN103531151A (en) * 2013-11-04 2014-01-22 京东方科技集团股份有限公司 OLED (organic light emitting diode) pixel circuit as well as driving method and display device
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US9202415B2 (en) 2012-03-21 2015-12-01 Innocom Technology (Shenzhen) Co., Ltd. OLED-based display device including a pixel circuit, and driving methods thereof
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CN107103882A (en) * 2017-06-29 2017-08-29 京东方科技集团股份有限公司 Pixel circuit and driving method thereof, and display panel
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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005164894A (en) * 2003-12-02 2005-06-23 Sony Corp Pixel circuit and display device, and their driving methods
JP2005195756A (en) * 2004-01-05 2005-07-21 Sony Corp Pixel circuit, display apparatus and driving methods for them
CN101140731A (en) * 2006-05-29 2008-03-12 索尼株式会社 Image display

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005164894A (en) * 2003-12-02 2005-06-23 Sony Corp Pixel circuit and display device, and their driving methods
JP2005195756A (en) * 2004-01-05 2005-07-21 Sony Corp Pixel circuit, display apparatus and driving methods for them
CN101140731A (en) * 2006-05-29 2008-03-12 索尼株式会社 Image display

Cited By (85)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102651192A (en) * 2011-06-21 2012-08-29 京东方科技集团股份有限公司 Active matrix/organic light emitting diode and driving circuit and method thereof
US9082342B2 (en) 2011-06-21 2015-07-14 Boe Technology Group Co., Ltd. AMOLED panel and driving circuit and method therefor
CN102654972A (en) * 2011-06-21 2012-09-05 京东方科技集团股份有限公司 Active matrix organic light emitting diode (AMOLED) and drive circuit and method of AMOLED
CN102654972B (en) * 2011-06-21 2015-08-12 京东方科技集团股份有限公司 An active matrix OLED panel and a driving circuit and method
CN102364568A (en) * 2011-06-27 2012-02-29 昆山工研院新型平板显示技术中心有限公司 Pixel cell circuit of AMOLED (active matrix/organic light emitting diode) and organic light-emitting display device
CN102364568B (en) 2011-06-27 2013-11-06 昆山工研院新型平板显示技术中心有限公司 Pixel cell circuit of AMOLED (active matrix/organic light emitting diode) and organic light-emitting display device
CN102654973B (en) * 2011-08-15 2014-11-19 京东方科技集团股份有限公司 Pixel circuit and drive method thereof as well as display panel
CN102654973A (en) * 2011-08-15 2012-09-05 京东方科技集团股份有限公司 Pixel circuit and drive method thereof as well as display panel
CN102651195A (en) * 2011-09-14 2012-08-29 京东方科技集团股份有限公司 OLED (Organic Light Emitting Diode) pixel structure for compensating light emitting nonuniformity and driving method
WO2013037295A1 (en) * 2011-09-14 2013-03-21 京东方科技集团股份有限公司 Oled pixel structure and driving method
CN102651195B (en) 2011-09-14 2014-08-27 京东方科技集团股份有限公司 OLED (Organic Light Emitting Diode) pixel structure for compensating light emitting nonuniformity and driving method
US9041634B2 (en) 2011-09-14 2015-05-26 Boe Technology Group Co., Ltd. Pixel structure of organic light emitting diode and driving method thereof
CN102654974B (en) * 2011-10-31 2015-01-21 京东方科技集团股份有限公司 Pixel unit drive circuit, pixel unit drive method and display device
US10021759B2 (en) 2011-10-31 2018-07-10 Boe Technology Group Co., Ltd. Pixel unit driving circuit and driving method, and display apparatus
KR101453964B1 (en) 2011-10-31 2014-10-22 보에 테크놀로지 그룹 컴퍼니 리미티드 Pixel unit driving circuit and driving method, and display apparatus
CN102654974A (en) * 2011-10-31 2012-09-05 京东方科技集团股份有限公司 Pixel unit drive circuit, pixel unit drive method and display device
CN103137062A (en) * 2011-11-24 2013-06-05 联胜(中国)科技有限公司 Organic light emitting diode pixel circuit and driving circuit and application thereof
CN102708790A (en) * 2011-12-01 2012-10-03 京东方科技集团股份有限公司 Pixel unit driving circuit and method, pixel unit and display device
CN102708789A (en) * 2011-12-01 2012-10-03 京东方科技集团股份有限公司 Pixel unit driving circuit and method, pixel unit and display device
CN102654976B (en) * 2012-01-12 2014-12-24 京东方科技集团股份有限公司 Pixel circuit and driving method thereof, and displau device
US9030388B2 (en) 2012-01-12 2015-05-12 Boe Technology Group Co., Ltd. Pixel circuit and driving method thereof
CN102654976A (en) * 2012-01-12 2012-09-05 京东方科技集团股份有限公司 Pixel circuit and driving method thereof
US9349319B2 (en) 2012-03-19 2016-05-24 Boe Technology Group Co., Ltd. AMOLED driving circuit, AMOLED driving method, and AMOLED display device
WO2013139127A1 (en) * 2012-03-19 2013-09-26 京东方科技集团股份有限公司 Amoled driving circuit, amoled driving method, and amoled display device
CN103325335B (en) * 2012-03-21 2015-09-09 群康科技(深圳)有限公司 Display and a driving method
CN103325335A (en) * 2012-03-21 2013-09-25 群康科技(深圳)有限公司 Displayer and driving method thereof
US9202415B2 (en) 2012-03-21 2015-12-01 Innocom Technology (Shenzhen) Co., Ltd. OLED-based display device including a pixel circuit, and driving methods thereof
WO2013166827A1 (en) * 2012-05-10 2013-11-14 北京京东方光电科技有限公司 Pixel driving circuit and driving method thereof, array substrate, and display device
US9269300B2 (en) 2012-05-10 2016-02-23 Beijing Boe Optoelectronics Technology Co., Ltd. Pixel driving circuit and method, array substrate, and display apparatus
CN102682704A (en) * 2012-05-31 2012-09-19 华南理工大学 Pixel driving circuit for active organic electroluminescent display and driving method therefor
CN103578404A (en) * 2012-07-18 2014-02-12 群康科技(深圳)有限公司 Organic light-emitting diode pixel circuit and displayer
CN103578404B (en) * 2012-07-18 2016-05-04 群康科技(深圳)有限公司 The organic light emitting diode display pixel circuit
CN103578405B (en) * 2012-07-19 2016-12-07 群康科技(深圳)有限公司 A display panel, the pixel driving circuit, a pixel driving method and an electronic device
US9076380B2 (en) 2012-07-19 2015-07-07 Innocom Technology (Shenzhen) Co., Ltd. Pixel driving cirucit, pixel driving methods, display panels and electronic devices
CN103578405A (en) * 2012-07-19 2014-02-12 群康科技(深圳)有限公司 Display panel, pixel driving circuit, pixel driving method and electronic device
CN102789761B (en) * 2012-08-06 2014-12-10 京东方科技集团股份有限公司 Pixel circuit, driving method thereof and organic light emitting display
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
CN102832229B (en) * 2012-08-31 2014-12-10 京东方科技集团股份有限公司 Pixel circuit, driving method and display device of light emitting device
CN102832229A (en) * 2012-08-31 2012-12-19 京东方科技集团股份有限公司 Pixel circuit, driving method and display device of light emitting device
CN103489398B (en) * 2013-05-10 2016-03-09 友达光电股份有限公司 The pixel circuit
US9384693B2 (en) 2013-05-10 2016-07-05 Au Optronics Corp. Pixel circuit and display apparatus using the same
CN103489398A (en) * 2013-05-10 2014-01-01 友达光电股份有限公司 The pixel circuit
WO2014190617A1 (en) * 2013-05-29 2014-12-04 京东方科技集团股份有限公司 Light emitting diode pixel unit circuit and display panel
CN103310732B (en) * 2013-06-09 2015-06-03 京东方科技集团股份有限公司 Pixel circuit, driving method thereof and display device
US9099417B2 (en) 2013-06-09 2015-08-04 Boe Technology Group Co., Ltd. Pixel circuit, driving method thereof and display device
CN103310732A (en) * 2013-06-09 2013-09-18 京东方科技集团股份有限公司 Pixel circuit, driving method thereof and display device
WO2014201755A1 (en) * 2013-06-21 2014-12-24 京东方科技集团股份有限公司 Pixel circuit and drive method therefor, organic light-emitting display panel and display device
US9589505B2 (en) 2013-11-04 2017-03-07 Boe Technology Group Co., Ltd. OLED pixel circuit, driving method of the same, and display device
CN103531151A (en) * 2013-11-04 2014-01-22 京东方科技集团股份有限公司 OLED (organic light emitting diode) pixel circuit as well as driving method and display device
CN103594059A (en) * 2013-11-29 2014-02-19 中国科学院上海高等研究院 AMOLED (Active Matrix/Organic Light-Emitting Diode) pixel driving circuit and method
CN103606351A (en) * 2013-11-29 2014-02-26 中国科学院上海高等研究院 An active matrix organic light emitting diode driving circuit and driving method for the pixel
CN103606351B (en) * 2013-11-29 2016-04-20 中国科学院上海高等研究院 An active matrix organic light emitting diode driving circuit and driving method for the pixel
CN103594059B (en) * 2013-11-29 2017-01-11 中国科学院上海高等研究院 An active matrix organic light emitting diode driving circuit and driving method for the pixel
CN103700346B (en) * 2013-12-27 2016-08-31 合肥京东方光电科技有限公司 Pixel driving circuit, the array substrate, a display device and a driving method of a pixel
CN103700346A (en) * 2013-12-27 2014-04-02 合肥京东方光电科技有限公司 Pixel driving circuit, array substrate, display device and pixel driving method
CN103927984A (en) * 2014-04-01 2014-07-16 深圳市华星光电技术有限公司 Pixel drive circuit and pixel drive method of OLED displayer
CN103927984B (en) * 2014-04-01 2017-07-28 深圳市华星光电技术有限公司 One kind oled display driving circuit and driving method for the pixel
CN103943070B (en) * 2014-04-09 2016-03-23 友达光电股份有限公司 Pixel driving circuit
CN103943070A (en) * 2014-04-09 2014-07-23 友达光电股份有限公司 Pixel driving circuit
CN103985351B (en) * 2014-05-09 2016-11-30 深圳市华星光电技术有限公司 A pixel driving circuit and a driving method of a display panel
CN103985351A (en) * 2014-05-09 2014-08-13 深圳市华星光电技术有限公司 Pixel driving circuit, driving method of pixel driving circuit and display panel
WO2015176425A1 (en) * 2014-05-19 2015-11-26 京东方科技集团股份有限公司 Pixel drive circuit, display device, and pixel drive method
US9691327B2 (en) 2014-06-09 2017-06-27 Boe Technology Group Co., Ltd. Pixel driving circuit, driving method thereof and display apparatus
WO2015188470A1 (en) * 2014-06-09 2015-12-17 京东方科技集团股份有限公司 Pixel drive circuit, and drive method and display device thereof
US10140919B2 (en) 2014-06-27 2018-11-27 Tianma Japan, Ltd. Pixel circuit and driving method thereof
US10013916B2 (en) 2014-06-27 2018-07-03 Nlt Technologies, Ltd. Pixel circuit and driving method thereof
CN105321460A (en) * 2014-06-27 2016-02-10 Nlt科技股份有限公司 The method of driving the pixel circuit and
TWI556212B (en) * 2014-07-31 2016-11-01 Everdisplay Optronics Shanghai Ltd Oled pixel compensation circuit and oled pixel driving method
CN104318897A (en) * 2014-11-13 2015-01-28 合肥鑫晟光电科技有限公司 Pixel circuit, organic electroluminescence display panel and display device
CN104318897B (en) * 2014-11-13 2017-06-06 合肥鑫晟光电科技有限公司 A pixel circuit, an organic electroluminescent display panel and a display device
US9953569B2 (en) 2014-11-13 2018-04-24 Boe Technology Group Co., Ltd. Pixel circuit, organic electroluminescent display panel, display apparatus and driving method thereof
US9837019B2 (en) 2014-12-24 2017-12-05 Boe Technology Group Co., Ltd. Pixel circuit, organic electroluminescent display panel and display device
WO2016101504A1 (en) * 2014-12-24 2016-06-30 京东方科技集团股份有限公司 Pixel circuit, organic electroluminescent display panel and display apparatus
CN104485074A (en) * 2014-12-30 2015-04-01 合肥鑫晟光电科技有限公司 Pixel driving circuit and method and display device
CN104485074B (en) * 2014-12-30 2017-05-31 合肥鑫晟光电科技有限公司 Pixel driving circuits, methods, and a display device
CN105575331A (en) * 2015-11-25 2016-05-11 友达光电股份有限公司 Pixel compensation circuit voltage
CN105427802A (en) * 2015-12-29 2016-03-23 深圳市华星光电技术有限公司 Amoled pixel driving circuit and driving method of pixels
WO2017193630A1 (en) * 2016-05-11 2017-11-16 京东方科技集团股份有限公司 Pixel circuit, driving method, array substrate, display panel and display device
US10037730B2 (en) 2016-05-11 2018-07-31 Boe Technology Group Co., Ltd. Pixel circuit, drive method, array substrate, display panel and display device
CN105761676A (en) * 2016-05-11 2016-07-13 京东方科技集团股份有限公司 Pixel circuit, driving method, array substrate, display panel and display device
CN106847188B (en) * 2017-03-31 2019-02-22 昆山国显光电有限公司 Pixel circuit and its driving method, display panel and display device
CN106847188A (en) * 2017-03-31 2017-06-13 昆山国显光电有限公司 Pixel circuit and driving method thereof, display panel and display device
CN107103882A (en) * 2017-06-29 2017-08-29 京东方科技集团股份有限公司 Pixel circuit and driving method thereof, and display panel
WO2019019590A1 (en) * 2017-07-27 2019-01-31 京东方科技集团股份有限公司 Pixel circuit, display substrate and display apparatus
CN109074777A (en) * 2018-07-24 2018-12-21 京东方科技集团股份有限公司 Pixel-driving circuit, method and display equipment

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