WO2021143752A1 - 显示面板、像素电路及其驱动方法 - Google Patents
显示面板、像素电路及其驱动方法 Download PDFInfo
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Definitions
- the reset circuit is configured to reset the first node and the second node according to the timing control signal of the adjacent pixel row, and the timing control signal of the adjacent pixel row
- the reset circuit includes a compensation control signal for the previous pixel row and a light emission control signal for the next pixel row.
- the write circuit is configured to receive a data voltage provided through a data line
- the reset circuit is configured to write to the first node and the second node according to the write control signal Input the first voltage and the second voltage or write the first voltage and the second voltage to the first node and the second node according to the write control signal and the timing control signal of the adjacent pixel row
- the write The input circuit includes a tenth transistor, the first electrode of the tenth transistor is electrically connected to the data line, and the control electrode of the tenth transistor is electrically connected to the write control line
- the storage capacitor circuit includes a third A capacitor and a temporary storage unit, one end of the third capacitor is electrically connected to the first node, the other end of the third capacitor is electrically connected to the second node, and the first end of the temporary storage unit is electrically connected To the second node, the second terminal of the temporary storage unit is electrically connected to the second electrode of the tenth transistor, and the control terminal of the temporary storage unit is electrically connected to
- the reset circuit is configured to receive a write control signal provided through a write control line, and the reset circuit is configured to send a message to the first node and the first node according to the write control signal.
- the second node writes the first voltage and the second voltage
- the write circuit is configured to receive the data voltage provided through a data line, wherein,
- Fig. 2a is a timing diagram of a pixel circuit according to an embodiment of the present disclosure
- Fig. 5a is a timing diagram of a pixel circuit according to an embodiment of the present disclosure.
- FIG. 11 is a schematic flowchart of a driving method of a pixel circuit according to an embodiment of the present disclosure.
- the reset circuit 40 includes: a first transistor T1 and a second transistor T2, the first electrode of the first transistor T1 is electrically connected to the first node N1, and the first transistor T1
- the second electrode of the T1 is electrically connected to the first power line Vinit1
- the control electrode of the first transistor T1 is electrically connected to the reset control line Rn1 (as shown in Figure 2) or the write control line Sn1 (as shown in Figures 3 and 4)
- the first power line Vinit1 is used to provide the first voltage Vinit to the reset circuit 40
- the first electrode of the second transistor T2 is electrically connected to the second node N2, and the second electrode of the second transistor T2 is electrically connected to the second power line Vref21
- the control electrode of the second transistor T2 is electrically connected to the reset control line Rn1 (as shown in Figure 2) or the write control line Sn1 (as shown in Figures 3 and 4), wherein the second power line Vref21 is used to reset
- the circuit 40 provides the second
- the reset circuit 40 further includes a potential holding unit 401, the potential holding unit 401 is connected to the second node N2, and the potential holding unit 401 is used to receive compensation control Signal AZn, and write the second voltage Vref2 to the second node N2 according to the compensation control signal AZn, wherein the compensation control signal AZn is provided to the potential holding unit 401 through the compensation control line AZn1, and the potential holding unit 401 includes: a third transistor T3, The first electrode of the third transistor T3 is electrically connected to the second node N2, the second electrode of the third transistor T3 is electrically connected to the second power line Vref21, and the control electrode of the third transistor T3 is electrically connected to the compensation control line AZn1.
- the writing circuit 60 includes a tenth transistor T10, the first electrode of the tenth transistor T10 is electrically connected to the data line Vdt1, and the control electrode of the tenth transistor T10
- the storage capacitor circuit 10 includes a third capacitor C3 and a temporary storage unit 101. One end of the third capacitor C3 is electrically connected to the first node N1, and the other end of the third capacitor C3 is electrically connected to the second node N1.
- the temporary storage unit 101 includes a fifth capacitor C5 and a twelfth transistor T12, wherein one end of the fifth capacitor C5 is electrically connected to the second node N2, and the first The other end of the five capacitor C5 is electrically connected to the second electrode of the tenth transistor T10; the first electrode of the twelfth transistor T12 is electrically connected to the other end of the fifth capacitor C5, and the second electrode of the twelfth transistor T12 is electrically connected to The third power line Vref11 and the control electrode of the twelfth transistor T12 are electrically connected to the emission control line EMn1, wherein the third power line Vref11 is used to provide the third voltage Vref1 to the temporary storage unit 101.
- the reset circuit 40 is also used to control the timing of adjacent pixel rows according to the reset control signal Rn or the write control signal Sn.
- the signal Cn resets the anode of the light-emitting element 20, where the timing control signal Cn of the adjacent pixel row is the compensation control signal AZn-1 of the previous pixel row
- the reset circuit 40 further includes: a seventeenth transistor T17, a seventeenth The first electrode of the transistor T17 is electrically connected to the anode of the light emitting element 20, the second electrode of the seventeenth transistor T17 is electrically connected to the first power line Vinit1, and the control electrode of the seventeenth transistor T17 is electrically connected to the reset control line Rn1 or write Enter the control line Sn1 (as shown in Figures 2, 3, 4, 7, and 8) or the compensation control line AZn-11 of the previous pixel row (as shown in Figures 5 and 6).
- the emission control line EMn-11 is connected; the twenty-first transistor T21 is electrically connected between the threshold compensation circuit 50 and the driving transistor 30 (at this time, the first pole of the twenty-first transistor T21 is electrically connected to the twenty-second transistor T22 The second pole of the twenty-first transistor T21 is electrically connected to the second pole of the twenty-third transistor T23), or is electrically connected between the driving transistor 30 and the power supply VDD (at this time, the twentieth The first electrode of a transistor T21 is electrically connected to the power supply VDD, the second electrode of the twenty-first transistor T21 is electrically connected to the first electrode of the twenty-second transistor T22), and the control electrode of the twenty-first transistor T21 is connected to the bottom
- the compensation control line AZn+11 of one pixel row is connected.
- the light emission control signal EMn, the reset control signal Rn, and the write control signal Sn are all high, so that the first transistor T1, the second transistor T2, the seventeenth transistor T17, and the seventh transistor T7
- the twenty-fourth transistor T24 is all turned off, and the voltage of the first node N1 is maintained at a low level by the first capacitor C1. Therefore, the twenty-second transistor T22 is still turned off, and the compensation control signal AZn is at low level, so that the first node N1 is turned off.
- EMn is the light emission control signal provided to the light emission control circuit 70
- AZn is the compensation control signal provided to the threshold compensation circuit 50
- Sn is the write control signal provided to the write circuit 60.
- FIG. 7a The working principle of the pixel circuit of the embodiment shown in FIG. 7 will be described below in conjunction with FIG. 7a. It should be noted that the structure of the temporary storage unit 101 in the embodiment shown in FIG. 7 (not shown in the figure) and its electrical connection relationship are the same as those in the embodiment of FIG. 3 and FIG. 4.
- the compensation control signal AZn, the compensation control signal AZn-1 of the previous pixel row, and the write control signal Sn are all high, so that the ninth transistor T9, the eighth transistor T8, the tenth transistor T10, and the The seventeenth transistor T17 and the twenty-third transistor T23 are both turned off, and the emission control signal EMn is low, so that the twenty-fourth transistor T24 and the temporary storage unit 101 are turned on, and the data voltage Vdt is written into the first through the temporary storage unit 101 The second node N2.
- EMn is the light emission control signal provided to the light emission control circuit 70 for the current pixel row
- AZn is the compensation control signal provided to the threshold compensation circuit 50 for the current pixel row
- Sn is the light emission control signal provided to the writing circuit 60 for the current pixel row.
- Write control signal is the light emission control signal provided to the light emission control circuit 70 for the current pixel row.
- the five transistor T25 is written into the second node N2, and the first node N1 is written into Vdd-Vth, where Vdd is the voltage of the power supply VDD, and the voltage stored in the sixth capacitor C6 at this time is Vdd-Vth-Vref2.
- the compensation control signal AZn and the write control signal Sn are both high, so that the thirteenth transistor T13, the fourteenth transistor T14, the fifteenth transistor T15, the seventeenth transistor T17, and the twenty-third transistor
- the transistor T23 and the twenty-fifth transistor T25 are both turned off, and the light emission control signal EMn is low, so that the twenty-fourth transistor T24 and the sixteenth transistor T16 are turned on, and the data voltage Vdt held by the seventh capacitor C7 passes through the The sixteen transistor T16 is written into the second node N2.
- an embodiment of the present disclosure also provides a display panel including the foregoing pixel circuit.
- S1 Receive a write control signal, and write a data voltage to the storage capacitor circuit according to the write control signal.
- the aforementioned storage medium may be a read-only memory, a magnetic disk or an optical disk, etc.
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Abstract
Description
Claims (19)
- 一种像素电路,其特征在于,包括:存储电容电路,所述存储电容电路的第一端电连接至第一节点,所述存储电容电路的第二端电连接至第二节点;发光元件;驱动晶体管,所述驱动晶体管的控制极电连接至所述第一节点;写入电路,所述写入电路电连接至所述存储电容电路,所述写入电路用于接收写入控制信号,并根据所述写入控制信号向所述存储电容电路写入数据电压;复位电路,所述复位电路电连接至所述第一节点和第二节点,所述复位电路用于接收复位控制信号,并根据所述复位控制信号对所述第一节点和所述第二节点进行复位,或者,用于接收写入控制信号和/或相邻像素行的时序控制信号,并根据所述写入控制信号和/或相邻像素行的时序控制信号对所述第一节点和所述第二节点进行复位;阈值补偿电路,所述阈值补偿电路电连接至所述第一节点和所述驱动晶体管,所述阈值补偿电路用于接收补偿控制信号,并根据补偿控制信号向所述第一节点写入补偿电压,其中,所述补偿电压至少包括所述驱动晶体管的阈值电压;发光控制电路,所述发光控制电路与所述驱动晶体管和所述发光元件电连接,所述发光控制电路用于接收发光控制信号,并根据所述发光控制信号控制所述发光元件进行发光工作,其中,所述驱动晶体管根据所述第一节点的电压控制所述发光元件的发光,在驱动阶段所述第一节点的电压为所述数据电压与所述补偿电压相叠加而产生的电压。
- 根据权利要求1所述的像素电路,其特征在于,所述复位电路配置为接收通过复位控制线提供的复位控制信号或者通过写入控制线提供的写入控制信号,并且所述复位电路包括:第一晶体管,所述第一晶体管的第一极电连接至所述第一节点,所述第一晶体管的第二极电连接至第一电源线,所述第一晶体管的控制极电连接至所述复位控制线或者所述写入控制线,其中,所述第一电源线用于向所述复位电路提供第一电压;第二晶体管,所述第二晶体管的第一极电连接至所述第二节点,所述第二晶体管的第二极电连接至第二电源线,所述第二晶体管的控制极电连接至所述复位控制线或者所述写入控制线,其中,所述第二电源线用于向所述复位电路提供第二电压。
- 根据权利要求2所述的像素电路,其特征在于,所述复位电路还包括电位保持单元, 所述电位保持单元与第二节点相连,所述复位电路用于接收所述补偿控制信号,并根据所述补偿控制信号向所述第二节点写入所述第二电压,其中,通过补偿控制线向所述电位保持单元提供所述补偿控制信号,所述电位保持单元包括:第三晶体管,所述第三晶体管的第一极电连接至所述第二节点,所述第三晶体管的第二极电连接至所述第二电源线,所述第三晶体管的控制极电连接至所述补偿控制线。
- 根据权利要求2或3所述的像素电路,其特征在于,所述写入电路配置为接收通过数据线提供的数据电压,并且所述复位电路配置为根据所述复位控制信号对所述第一节点和所述第二节点进行复位,其中所述写入电路包括第七晶体管,所述第七晶体管的第一极电连接至所述数据线,所述第七晶体管的第二极电连接至所述第二节点,所述第七晶体管的控制极电连接至所述写入控制线;所述存储电容电路包括第一电容和第二电容,其中,所述第一电容的一端电连接至所述第一节点,所述第一电容的另一端电连接至所述第二节点;所述第二电容的一端电连接至所述第一节点或所述第二节点,所述第二电容的另一端电连接至第三电源线,其中,所述第三电源线用于向所述存储电容电路提供第三电压。
- 根据权利要求2或3所述的像素电路,其特征在于,所述写入电路配置为接收通过数据线提供的数据电压,并且所述复位电路配置为根据所述写入控制信号向所述第一节点和所述第二节点写入第一电压和第二电压或者根据所述写入控制信号和相邻像素行的时序控制信号向所述第一节点和所述第二节点写入第一电压和第二电压,所述写入电路包括第十晶体管,所述第十晶体管的第一极电连接至所述数据线,所述第十晶体管的控制极电连接至所述写入控制线;所述存储电容电路包括第三电容和暂存单元,所述第三电容的一端电连接至所述第一节点,所述第三电容的另一端电连接至所述第二节点,所述暂存单元的第一端电连接至所述第二节点,所述暂存单元的第二端电连接至所述第十晶体管的第二极,所述暂存单元的控制端电连接至提供所述发光控制信号的发光控制线。
- 根据权利要求5所述的像素电路,其特征在于,所述暂存单元包括第四电容和第十一晶体管,其中,所述第十一晶体管的第一极电连接至所述第二节点,所述第十一晶体管的第二极电连接至所述第十晶体管的第二极,所述第十一晶体管的控制极电连接至所述发光控制线;所述第四电容的一端电连接至所述第十晶体管的第二极,所述第四电容的另一 端电连接至第三电源线,其中,所述第三电源线用于向所述暂存单元提供所述第三电压。
- 根据权利要求5所述的像素电路,其特征在于,所述暂存单元包括第五电容和第十二晶体管,其中,所述第五电容的一端电连接至所述第二节点,所述第五电容的另一端电连接至所述第十晶体管的第二极;所述第十二晶体管的第一极电连接至所述第五电容的另一端,所述第十二晶体管的第二极电连接至第三电源线,所述第十二晶体管的控制极电连接至所述发光控制线,其中,所述第三电源线用于向所述暂存单元提供所述第三电压。
- 根据权利要求1所述的像素电路,其特征在于,所述复位电路配置为根据所述相邻像素行的时序控制信号对所述第一节点和所述第二节点进行复位,所述相邻像素行的时序控制信号包括上一像素行的补偿控制信号和下一像素行的发光控制信号,所述复位电路包括:第四晶体管,所述第四晶体管的第一极电连接至所述第一节点,所述第四晶体管的控制极电连接至所述下一像素行的发光控制线;第五晶体管,所述第五晶体管的第一极电连接至所述第四晶体管的第二极,所述第五晶体管的第二极电连接至第一电源线,所述第五晶体管的控制极电连接至上一像素行的补偿控制线,其中,所述第一电源线用于向所述复位电路提供所述第一电压;第六晶体管,所述第六晶体管的第一极电连接至所述第二节点,所述第六晶体管的第二极电连接至第二电源线,所述第六晶体管的控制极电连接至所述上一像素行的补偿控制线,其中,所述第二电源线用于向所述复位电路提供所述第二电压。
- 根据权利要求8所述的像素电路,其特征在于,所述写入电路配置为接收通过数据线提供的数据电压,其中所述写入电路包括第七晶体管,所述第七晶体管的第一极电连接至所述数据线,所述第七晶体管的第二极电连接至所述第二节点,所述第七晶体管的控制极电连接至所述写入控制线;所述存储电容电路包括第一电容和第二电容,其中,所述第一电容的一端电连接至所述第一节点,所述第一电容的另一端电连接至所述第二节点;所述第二电容的一端电连接至所述第一节点或所述第二节点,所述第二电容的另一端电连接至第三电源线,其中,所述第三电源线用于向所述存储电容电路提供第三电压。
- 根据权利要求1所述的像素电路,其特征在于,所述复位电路配置为根据所述写 入控制信号和相邻像素行的时序控制信号对所述第一节点和所述第二节点进行复位,所述相邻像素行的时序控制信号包括上一像素行的补偿控制信号,所述复位电路包括:第八晶体管,所述第八晶体管的第一极电连接至所述第一节点,所述第八晶体管的第二极电连接至第一电源线,所述第八晶体管的控制极电连接至所述写入控制线,其中,所述第一电源线用于向所述复位电路提供所述第一电压;第九晶体管,所述第九晶体管的第一极电连接至所述第二节点,所述第九晶体管的第二极电连接至第二电源线,所述第九晶体管的控制极电连接至所述上一像素行的补偿控制线,其中,所述第二电源线用于向所述复位电路提供所述第二电压。
- 根据权利要求10所述的像素电路,其特征在于,所述写入电路配置为接收通过数据线提供的数据电压,并且所述复位电路配置为根据所述写入控制信号向所述第一节点和所述第二节点写入第一电压和第二电压或者根据所述写入控制信号和相邻像素行的时序控制信号向所述第一节点和所述第二节点写入第一电压和第二电压,所述写入电路包括第十晶体管,所述第十晶体管的第一极电连接至所述数据线,所述第十晶体管的控制极电连接至所述写入控制线;所述存储电容电路包括第三电容和暂存单元,所述第三电容的一端电连接至所述第一节点,所述第三电容的另一端电连接至所述第二节点,所述暂存单元的第一端电连接至所述第二节点,所述暂存单元的第二端电连接至所述第十晶体管的第二极,所述暂存单元的控制端电连接至提供所述发光控制信号的发光控制线。
- 根据权利要求11所述的像素电路,其特征在于,所述暂存单元包括第四电容和第十一晶体管,其中,所述第十一晶体管的第一极电连接至所述第二节点,所述第十一晶体管的第二极电连接至所述第十晶体管的第二极,所述第十一晶体管的控制极电连接至所述发光控制线;所述第四电容的一端电连接至所述第十晶体管的第二极,所述第四电容的另一端电连接至第三电源线,其中,所述第三电源线用于向所述暂存单元提供所述第三电压。
- 根据权利要求11所述的像素电路,其特征在于,所述暂存单元包括第五电容和第十二晶体管,其中,所述第五电容的一端电连接至所述第二节点,所述第五电容的另一端电连接至所述第十晶体管的第二极;所述第十二晶体管的第一极电连接至所述第五电容的另一端,所述第十二晶体管的第二极电连接至第三电源线,所述第十二晶体管的控制极电连接至所述发光控制线,其中,所述第三电源线用于向所述暂存单元提供所述第三电压。
- 根据权利要求1所述的像素电路,其特征在于,所述复位电路配置为接收通过写入控制线提供的写入控制信号,并且所述复位电路配置为根据所述写入控制信号向所述第一节点和所述第二节点写入第一电压和第二电压,所述写入电路配置为接收通过数据线提供的所述数据电压,其中,所述写入电路包括第十三晶体管,所述第十三晶体管的第一极电连接至所述数据线,所述第十三晶体管的第二极电连接至所述第二节点,所述第十三晶体管的控制极电连接至所述写入控制线;所述复位电路与所述写入电路共用所述第十三晶体管,所述复位电路还包括第十四晶体管,所述第十四晶体管的第一极电连接至所述第一节点,所述第十四晶体管的第二极电连接至第一电源线,所述第十四晶体管的控制极电连接至所述写入控制线,其中,所述第一电源线用于向所述复位电路提供所述第一电压;所述存储电容电路包括第六电容和暂存单元,其中,所述第六电容的一端电连接至所述第一节点,所述第六电容的另一端电连接至所述第二节点;所述暂存单元包括第七电容、第十五晶体管和第十六晶体管,所述第十五晶体管的第一极电连接至所述第二节点,所述第十五晶体管的第二极电连接至所述第七电容的一端,所述第十五晶体管的控制极电连接至所述写入控制线;所述第十六晶体管的第一极电连接至所述第二节点,所述第十六晶体管的第二极电连接至所述第七电容的一端,所述第十六晶体管的控制极电连接至提供所述发光控制信号的发光控制线;所述第七电容的另一端电连接至第三电源线,其中,所述第三电源线用于向所述暂存单元提供所述第三电压。
- 根据权利要求2-14中任一项所述的像素电路,其特征在于,所述复位电路还用于根据所述复位控制信号或所述写入控制信号或所述相邻像素行的时序控制信号对所述发光元件的阳极进行复位,其中,所述相邻像素行的时序控制信号为上一像素行的补偿控制信号,所述复位电路还包括:第十七晶体管,所述第十七晶体管的第一极电连接至所述发光元件的阳极,所述第十七晶体管的第二极电连接至所述第一电源线,所述第十七晶体管的控制极电连接至复位控制线或写入控制线或上一像素行的补偿控制线。
- 根据权利要求1所述的像素电路,其特征在于,所述复位电路还用于接收补偿控制信号,并根据所述补偿控制信号和相邻像素行的时序控制信号对所述第一节点和所述第二节点进行复位,其中,所述复位电路配置为接收通过所述补偿控制线提供的所述补偿控制信号,所述相邻像素行的时序控制信号包括上一像素行的发光控制信号和下一像素行的 补偿控制信号,所述复位电路包括:第十八晶体管,所述第十八晶体管的第一极与所述第二节点相连,所述第十八晶体管的第二极电连接至第二电源线,所述第十八晶体管的控制极电连接至当前像素行的补偿控制线,其中,所述第二电源线用于向所述复位电路提供第二电压;第十九晶体管,所述第十九晶体管的第一极电连接至所述发光控制电路,所述第十九晶体管的第二极电连接至第一电源线,所述第十九晶体管的控制极电连接至当前像素行的补偿控制线,其中,所述第一电源线用于向所述复位电路提供第一电压;阻断单元,所述阻断单元电连接在所述阈值补偿电路与所述驱动晶体管之间,或者电连接在所述驱动晶体管与供电电源之间,所述阻断单元还与上一像素行的发光控制线和下一像素行的补偿控制线相连,所述阻断单元用于根据所述上一像素行的发光控制信号和所述下一像素行的补偿控制信号导通或关断;其中,当所述复位电路对所述第一节点和所述第二节点进行复位时,所述第二电压通过所述第十八晶体管写入所述第二节点,所述阻断单元在所述上一像素行的发光控制信号和所述下一像素行的补偿控制信号的控制下导通,所述发光控制电路在所述发光控制信号的控制下导通,所述阈值补偿电路在所述补偿控制信号的控制下导通,所述第一电压通过所述第十九晶体管、所述发光控制电路和所述阈值补偿电路写入所述第一节点。
- 根据权利要求16所述的像素电路,其特征在于,所述阻断单元包括第二十晶体管和第二十一晶体管,其中所述第二十晶体管和所述第二十一晶体管的第一极均电连接至驱动晶体管的第二极并且第二十晶体管和所述第二十一晶体管的第二极均电连接至所述阈值补偿电路,或者所述第二十晶体管和所述第二十一晶体管的第一极均电连接至供电电源并且第二十晶体管和所述第二十一晶体管的第二极均电连接至在所述驱动晶体管的第一极,并且其中所述第二十晶体管的控制极与上一像素行的发光控制线相连,所述第二十一晶体管的控制极与下一像素行的补偿控制线相连。
- 一种显示面板,其特征在于,包括根据权利要求1-17中任一项所述的像素电路。
- 一种用于根据权利要求1-17中任一项所述的像素电路的驱动方法,其特征在于,包括:接收写入控制信号,并根据所述写入控制信号向存储电容电路写入数据电压;接收复位控制信号,并根据所述复位控制信号对第一节点和第二节点进行复位,或者, 接收写入控制信号和/或相邻像素行的时序控制信号,并根据所述写入控制信号和/或相邻像素行的时序控制信号对所述第一节点和所述第二节点进行复位;接收补偿控制信号,并根据补偿控制信号向所述第一节点写入补偿电压,其中,所述补偿电压至少包括驱动晶体管的阈值电压;接收发光控制信号,并根据所述发光控制信号控制发光元件进行发光工作,其中,所述驱动晶体管根据所述第一节点的电压控制所述发光元件的发光,在驱动阶段所述第一节点的电压为所述数据电压与所述补偿电压相叠加而产生的电压。
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