技术领域technical field
本发明涉及显示技术领域，尤其涉及一种像素电路及显示面板。The present invention relates to the field of display technology, in particular to a pixel circuit and a display panel.
背景技术Background technique
随着显示技术的进步，有机发光显示器(Organic Light Emitting Diode，OLED)是当今平板显示器研究领域的热点之一，越来越多的有源矩阵有机发光二极管(ActiveMatrix Organic Light Emitting Diode，AMOLED)显示面板进入市场，相对于传统的薄膜晶体管液晶显示面板(Thin Film Transistor Liquid Crystal Display,TFT LCD)，AMOLED具有更快的反应速度，更高的对比度以及更广大的视角。With the advancement of display technology, Organic Light Emitting Diode (OLED) is one of the hotspots in the field of flat panel display research today, and more and more Active Matrix Organic Light Emitting Diode (AMOLED) display Panels have entered the market. Compared with traditional thin film transistor liquid crystal display panels (Thin Film Transistor Liquid Crystal Display, TFT LCD), AMOLED has faster response speed, higher contrast ratio and wider viewing angle.
然而，通过对OLED显示屏进行测试发现，OLED显示屏从暗态显示画面跳跃到亮态显示画面时响应速度较差。这是由于在关态下驱动OLED发光的驱动晶体管的关态电压较大(为保证显示屏的对比度，需要将关态电压设置较大，以使驱动晶体管处于完全截止的状态)，因此在显示屏由暗态跳变到亮态时，驱动晶体管会发生短暂的阈值电压漂移，从而导致响应速度变差，发生迟滞效应。However, it is found through testing the OLED display screen that the response speed of the OLED display screen is poor when jumping from a dark state display picture to a bright state display picture. This is because the off-state voltage of the drive transistor that drives the OLED to emit light in the off-state is relatively large (in order to ensure the contrast of the display screen, the off-state voltage needs to be set relatively high so that the drive transistor is in a completely cut-off state), so when the display When the screen jumps from the dark state to the bright state, the driving transistor will experience a short-term threshold voltage shift, which will lead to poor response speed and hysteresis effect.
因此，如何提高显示面板的响应速度，从而改善迟滞效应，是本领域技术人员亟待解决的技术问题。Therefore, how to improve the response speed of the display panel so as to improve the hysteresis effect is a technical problem to be solved urgently by those skilled in the art.
发明内容Contents of the invention
本发明实施例提供了一种像素电路及显示面板，用以改善现有技术中显示面板存在的迟滞效应。Embodiments of the present invention provide a pixel circuit and a display panel for improving the hysteresis effect of the display panel in the prior art.
本发明实施例提供了一种像素电路，包括：驱动模块、旁路模块和发光器件；其中，An embodiment of the present invention provides a pixel circuit, including: a driving module, a bypass module and a light emitting device; wherein,
所述驱动模块用于向所述发光器件的输入端输入驱动电流，驱动所述发光器件发光；The driving module is used to input a driving current to the input terminal of the light emitting device to drive the light emitting device to emit light;
所述旁路模块连接于所述发光器件的输入端和输出端之间，用于分流所述驱动模块输入到所述发光器件的驱动电流。The bypass module is connected between the input terminal and the output terminal of the light emitting device, and is used for shunting the driving current input by the driving module to the light emitting device.
在一种可能的实施方式中，本发明实施例提供的上述像素电路中，所述旁路模块，包括：电阻；In a possible implementation manner, in the above pixel circuit provided by the embodiment of the present invention, the bypass module includes: a resistor;
所述电阻连接于所述发光器件的输入端和输出端之间。The resistor is connected between the input terminal and the output terminal of the light emitting device.
在一种可能的实施方式中，本发明实施例提供的上述像素电路中，所述驱动模块，包括：复位单元、写入单元、补偿单元、驱动单元、控制单元和电源输入单元；其中，In a possible implementation manner, in the above-mentioned pixel circuit provided by the embodiment of the present invention, the driving module includes: a reset unit, a writing unit, a compensation unit, a driving unit, a control unit, and a power input unit; wherein,
所述复位单元的第一控制端和第二控制端用于输入第一控制信号，输入端用于输入参考信号，第一输出端与第一节点相连，第二输出端与第二节点相连；所述复位单元用于在所述第一控制信号的控制下，将所述参考信号分别输出到所述第一节点和所述第二节点；The first control terminal and the second control terminal of the reset unit are used to input a first control signal, the input terminal is used to input a reference signal, the first output terminal is connected to the first node, and the second output terminal is connected to the second node; The reset unit is configured to respectively output the reference signal to the first node and the second node under the control of the first control signal;
所述写入单元的控制端用于输入第二控制信号，输入端用于输入数据信号，输出端与所述第三节点相连；所述写入单元用于在所述第二控制信号的控制下，将所述数据信号输出到所述第三节点；The control terminal of the writing unit is used for inputting a second control signal, the input terminal is used for inputting a data signal, and the output terminal is connected to the third node; the writing unit is used for controlling the second control signal Next, output the data signal to the third node;
所述补偿单元的控制端用于输入所述第二控制信号，第一输入端用于输入电源信号，第二输入端与第四节点相连，输出端与所述第一节点相连；所述补偿单元用于在所述第二控制信号的控制下，通过所述电源信号对所述第一节点进行所述驱动单元的阈值电压的补偿；The control terminal of the compensation unit is used to input the second control signal, the first input terminal is used to input the power signal, the second input terminal is connected to the fourth node, and the output terminal is connected to the first node; the compensation The unit is configured to compensate the threshold voltage of the driving unit to the first node through the power supply signal under the control of the second control signal;
所述驱动单元的控制端与所述第一节点相连，输入端与所述第三节点相连，输出端与所述第四节点相连；所述驱动单元用于在所述第一节点的控制下，导通所述第三节点和所述第四节点；The control end of the drive unit is connected to the first node, the input end is connected to the third node, and the output end is connected to the fourth node; the drive unit is used to control the first node , conducting the third node and the fourth node;
所述控制单元的控制端用于输入第三控制信号，输入端与所述第四节点相连，输出端与所述发光器件的输入端相连；所述控制单元用于在所述第三控制信号的控制下，导通所述第四节点与所述发光器件的输入端；The control terminal of the control unit is used for inputting a third control signal, the input terminal is connected to the fourth node, and the output terminal is connected to the input terminal of the light emitting device; the control unit is used for receiving the third control signal Under the control of , turn on the fourth node and the input terminal of the light emitting device;
所述电源输入单元的控制端用于输入所述第三控制信号，输入端用于输入所述电源信号，输出端与所述第三节点相连；所述电源输入单元用于在所述第三控制信号的控制下，将所述电源信号输出到所述第三节点。The control terminal of the power input unit is used to input the third control signal, the input terminal is used to input the power signal, and the output terminal is connected to the third node; Under the control of the control signal, output the power signal to the third node.
在一种可能的实施方式中，本发明实施例提供的上述像素电路中，所述电源输入单元，包括：第一开关晶体管；In a possible implementation manner, in the above-mentioned pixel circuit provided by the embodiment of the present invention, the power input unit includes: a first switch transistor;
所述第一开关晶体管的栅极用于输入所述第三控制信号，源极用于输入所述电源信号，漏极与所述第三节点相连。The gate of the first switching transistor is used to input the third control signal, the source is used to input the power signal, and the drain is connected to the third node.
在一种可能的实施方式中，本发明实施例提供的上述像素电路中，所述写入单元，包括：第二开关晶体管；In a possible implementation manner, in the above-mentioned pixel circuit provided by the embodiment of the present invention, the writing unit includes: a second switch transistor;
所述第二开关晶体管的栅极用于输入所述第二控制信号，源极用于输入所述数据信号，漏极与所述第三节点相连。The gate of the second switch transistor is used to input the second control signal, the source is used to input the data signal, and the drain is connected to the third node.
在一种可能的实施方式中，本发明实施例提供的上述像素电路中，所述驱动单元，包括：第三开关晶体管；In a possible implementation manner, in the above-mentioned pixel circuit provided by the embodiment of the present invention, the driving unit includes: a third switch transistor;
所述第三开关晶体管的栅极与所述第一节点相连，源极与所述第三节点相连，漏极与所述第四节点相连。The gate of the third switching transistor is connected to the first node, the source is connected to the third node, and the drain is connected to the fourth node.
在一种可能的实施方式中，本发明实施例提供的上述像素电路中，所述补偿单元，包括：第四开关晶体管和电容；其中，In a possible implementation manner, in the above-mentioned pixel circuit provided by the embodiment of the present invention, the compensation unit includes: a fourth switch transistor and a capacitor; wherein,
所述第四开关晶体管的栅极用于输入所述第二控制信号，源极与所述第四节点相连，漏极与所述第一节点相连；The gate of the fourth switch transistor is used to input the second control signal, the source is connected to the fourth node, and the drain is connected to the first node;
所述电容的一端用于输入所述电源信号，另一端与所述第一节点相连。One end of the capacitor is used to input the power signal, and the other end is connected to the first node.
在一种可能的实施方式中，本发明实施例提供的上述像素电路中，所述复位单元，包括：第五开关晶体管和第六开关晶体管；其中，In a possible implementation manner, in the above-mentioned pixel circuit provided by the embodiment of the present invention, the reset unit includes: a fifth switch transistor and a sixth switch transistor; wherein,
所述第五开关晶体管的栅极用于输入所述第一控制信号，源极用于输入所述参考信号，漏极与所述第一节点相连；The gate of the fifth switch transistor is used to input the first control signal, the source is used to input the reference signal, and the drain is connected to the first node;
所述第六开关晶体管的栅极用于输入所述第一控制信号，源极用于输入所述参考信号，漏极与所述第二节点相连。The gate of the sixth switch transistor is used to input the first control signal, the source is used to input the reference signal, and the drain is connected to the second node.
在一种可能的实施方式中，本发明实施例提供的上述像素电路中，所述控制单元，包括：第七开关晶体管；In a possible implementation manner, in the above-mentioned pixel circuit provided by the embodiment of the present invention, the control unit includes: a seventh switch transistor;
所述第七开关晶体管的栅极用于输入所述第三控制信号，源极与所述第四节点相连，漏极与所述发光器件的输入端相连。The gate of the seventh switch transistor is used to input the third control signal, the source is connected to the fourth node, and the drain is connected to the input terminal of the light emitting device.
在一种可能的实施方式中，本发明实施例提供的上述像素电路中，所述驱动模块，包括：第一子单元和第二子单元；其中，In a possible implementation manner, in the above-mentioned pixel circuit provided by the embodiment of the present invention, the driving module includes: a first subunit and a second subunit; wherein,
所述第一子单元的控制端用于输入扫描信号，输入端用于输入数据信号，输出端与控制节点相连；所述第一子单元用于在所述扫描信号的控制下，将所述数据信号输出到所述控制节点；The control terminal of the first subunit is used for inputting a scanning signal, the input terminal is used for inputting a data signal, and the output terminal is connected to a control node; the first subunit is used for controlling the scanning signal to the a data signal is output to the control node;
所述第二子单元的控制端与所述控制节点相连，输入端用于输入电源信号，输出端与所述发光器件的输入端相连；所述第二子单元用于在所述控制节点的控制下，通过所述电源信号驱动所述发光器件发光。The control terminal of the second subunit is connected to the control node, the input terminal is used for inputting a power signal, and the output terminal is connected to the input terminal of the light emitting device; the second subunit is used for Under control, the light emitting device is driven to emit light through the power supply signal.
在一种可能的实施方式中，本发明实施例提供的上述像素电路中，所述第一子单元，包括：第八开关晶体管；In a possible implementation manner, in the above-mentioned pixel circuit provided by the embodiment of the present invention, the first subunit includes: an eighth switch transistor;
所述第八开关晶体管的栅极用于输入所述扫描信号，源极用于输入所述数据信号，漏极与所述控制节点相连。The gate of the eighth switch transistor is used to input the scan signal, the source is used to input the data signal, and the drain is connected to the control node.
在一种可能的实施方式中，本发明实施例提供的上述像素电路中，所述第二子单元，包括：第九开关晶体管和存储电容；In a possible implementation manner, in the above pixel circuit provided by the embodiment of the present invention, the second subunit includes: a ninth switch transistor and a storage capacitor;
所述第九开关晶体管的栅极与所述控制节点相连，源极用于输入所述电源信号，漏极与所述发光器件的输入端相连；The gate of the ninth switching transistor is connected to the control node, the source is used to input the power signal, and the drain is connected to the input terminal of the light emitting device;
所述存储电容的一端用于输入所述电源信号，另一端与所述控制节点相连。One end of the storage capacitor is used to input the power signal, and the other end is connected to the control node.
本发明实施例提供了一种显示面板，包括本发明实施例提供的上述像素电路。An embodiment of the present invention provides a display panel, including the above-mentioned pixel circuit provided by the embodiment of the present invention.
本发明实施例的有益效果包括：The beneficial effects of the embodiments of the present invention include:
本发明实施例提供了一种像素电路及显示面板，该像素电路包括：驱动模块、旁路模块和发光器件；其中，驱动模块用于向发光器件的输入端输入驱动电流，驱动发光器件发光；旁路模块连接于发光器件的输入端和输出端之间，用于分流驱动模块输入到发光器件的驱动电流。这样可以将驱动模块的关态电压设置较小一点，使驱动模块在暗态时可以输出微量电流以保障响应时间，提高响应速度，改善迟滞效应；同时通过在发光器件的输入、输出端之间连接一个旁路模块，进而通过旁路模块的分流作用使得经过发光器件的电流较小，从而保障暗态下发光器件的亮度足够暗，保证了显示面板的暗态显示亮度。An embodiment of the present invention provides a pixel circuit and a display panel. The pixel circuit includes: a driving module, a bypass module, and a light emitting device; wherein, the driving module is used to input a driving current to an input end of the light emitting device to drive the light emitting device to emit light; The bypass module is connected between the input terminal and the output terminal of the light emitting device, and is used for shunting the driving current input by the driving module to the light emitting device. In this way, the off-state voltage of the driving module can be set a little smaller, so that the driving module can output a small amount of current in the dark state to ensure the response time, improve the response speed, and improve the hysteresis effect; A bypass module is connected, and the shunt effect of the bypass module makes the current passing through the light-emitting device smaller, so as to ensure that the brightness of the light-emitting device in the dark state is sufficiently dark, and the display brightness of the display panel in the dark state is ensured.
附图说明Description of drawings
图1为本发明实施例提供的像素电路的结构示意图；FIG. 1 is a schematic structural diagram of a pixel circuit provided by an embodiment of the present invention;
图2为本发明实施例提供的驱动晶体管的工作特性曲线图；FIG. 2 is a graph showing the operating characteristics of the driving transistor provided by the embodiment of the present invention;
图3a和图3b分别为本发明实施例提供的像素电路的具体结构示意。FIG. 3 a and FIG. 3 b are schematic structural diagrams of pixel circuits provided by embodiments of the present invention, respectively.
具体实施方式detailed description
下面结合附图，对本发明实施例提供的像素电路及显示面板的具体实施方式进行详细的说明。The specific implementation manners of the pixel circuit and the display panel provided by the embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
本发明实施例提供了一种像素电路，如图1所示，包括：驱动模块01、旁路模块02和发光器件OLED；其中，驱动模块01用于向发光器件OLED的输入端输入驱动电流，驱动发光器件OLED发光；旁路模块02连接于发光器件OLED的输入端和输出端之间，用于分流驱动模块01输入到发光器件OLED的驱动电流，发光器件的输出端接入地电源信号ELVSS。An embodiment of the present invention provides a pixel circuit, as shown in FIG. 1 , including: a driving module 01, a bypass module 02, and a light-emitting device OLED; wherein, the driving module 01 is used to input a driving current to an input terminal of the light-emitting device OLED, Drive the light-emitting device OLED to emit light; the bypass module 02 is connected between the input terminal and the output terminal of the light-emitting device OLED, and is used to shunt the driving current input by the driving module 01 to the light-emitting device OLED, and the output terminal of the light-emitting device is connected to the ground power signal ELVSS .
具体地，对显示面板进行响应时间测试，测试时将显示面板设置为显示一段时间(例如一分钟)黑画面，然后切换到白画面。以驱动管为P型管为例进行说明，则在这一分钟的黑画面显示时间内，像素电路中驱动像素发光的驱动晶体管的栅极电压为正压，驱动晶体管处于关态。如图2所示，其中，Gate1为栅极无偏压的晶体管特性曲线、Gate2和Gate3分别为栅极电压低于正常关态电压的晶体管特性曲线；由图2可知，黑画面1比黑画面2的栅极电压更大，其漏电流更大，亮度也更高；将显示面板从黑画面1切换到白画面的迟滞现象，相较于显示面板从黑画面2切换到白画面更严重，其表现为第一帧画面不能及时回到正常的白画面。因此，为了改善显示面板的响应速度，需要降低显示面板显示黑画面时驱动晶体管的栅极电压，即本发明实施例提供的上述像素电路中，将驱动模块的关态电压设置较小，使驱动模块在关态时可以输出微量电流以保障响应时间，提高响应速度，改善迟滞效应；同时通过在发光器件的输入、输出端之间连接一个旁路模块，进而通过旁路模块的分流作用使得经过发光器件的电流较小，从而保障暗态下发光器件的亮度足够暗，保证了显示面板的暗态显示亮度。Specifically, a response time test is performed on the display panel. During the test, the display panel is set to display a black picture for a period of time (for example, one minute), and then switch to a white picture. Taking the P-type transistor as an example for illustration, then during the black screen display time of one minute, the gate voltage of the driving transistor that drives the pixel to emit light in the pixel circuit is a positive voltage, and the driving transistor is in an off state. As shown in Figure 2, among them, Gate1 is the transistor characteristic curve with no bias voltage on the gate, Gate2 and Gate3 are the transistor characteristic curves with the gate voltage lower than the normal off-state voltage; The gate voltage of 2 is larger, its leakage current is larger, and the brightness is also higher; the hysteresis phenomenon of switching the display panel from black screen 1 to white screen is more serious than that of the display panel switching from black screen 2 to white screen, It is manifested that the first frame of the picture cannot return to the normal white picture in time. Therefore, in order to improve the response speed of the display panel, it is necessary to reduce the gate voltage of the driving transistor when the display panel displays a black screen, that is, in the above-mentioned pixel circuit provided by the embodiment of the present invention, the off-state voltage of the driving module is set to be small, so that the driving When the module is in the off state, it can output a small amount of current to ensure the response time, improve the response speed, and improve the hysteresis effect; at the same time, a bypass module is connected between the input and output terminals of the light-emitting device, and then the shunt effect of the bypass module makes the passing through The current of the light-emitting device is small, so that the brightness of the light-emitting device is sufficiently dark in the dark state, and the display brightness of the display panel in the dark state is ensured.
在具体实施时，本发明实施例提供的上述像素电路中，如图3a和图3b所示，旁路模块02可以包括：电阻R；电阻R连接于发光器件OLED的输入端和输出端之间。具体地，旁路模块可以通过电阻来实现对驱动模块输出的驱动电流进行分流，这样既能保障显示面板响应时间，改善迟滞效应，同时又可以避免暗态下驱动模块输出的驱动电流影响显示面板的暗态显示亮度。During specific implementation, in the above-mentioned pixel circuit provided by the embodiment of the present invention, as shown in FIG. 3a and FIG. 3b, the bypass module 02 may include: a resistor R; the resistor R is connected between the input terminal and the output terminal of the light emitting device OLED . Specifically, the bypass module can shunt the drive current output by the drive module through resistors, which can not only ensure the response time of the display panel, improve the hysteresis effect, but also prevent the drive current output by the drive module from affecting the display panel in the dark state. The dark state shows brightness.
在具体实施时，本发明实施例提供的上述像素电路中，如图3a所示，驱动模块01包括：复位单元011、写入单元012、补偿单元013、驱动单元014、控制单元015和电源输入单元016；其中，During specific implementation, in the above-mentioned pixel circuit provided by the embodiment of the present invention, as shown in FIG. Unit 016; where,
复位单元011的第一控制端和第二控制端用于输入第一控制信号S1，输入端用于输入参考信号Vref，第一输出端与第一节点P1相连，第二输出端与第二节点P2相连；复位单元011用于在第一控制信号S1的控制下，将参考信号Vref分别输出到第一节点P1和第二节点P2；The first control terminal and the second control terminal of the reset unit 011 are used to input the first control signal S1, the input terminal is used to input the reference signal Vref, the first output terminal is connected to the first node P1, and the second output terminal is connected to the second node P2 is connected; the reset unit 011 is configured to output the reference signal Vref to the first node P1 and the second node P2 respectively under the control of the first control signal S1;
写入单元012的控制端用于输入第二控制信号S2，输入端用于输入数据信号Vdata，输出端与第三节点P3相连；写入单元012用于在第二控制信号S2的控制下，将数据信号Vdata输出到第三节点P3；The control terminal of the writing unit 012 is used to input the second control signal S2, the input terminal is used to input the data signal Vdata, and the output terminal is connected to the third node P3; the writing unit 012 is used to, under the control of the second control signal S2, outputting the data signal Vdata to the third node P3;
补偿单元013的控制端用于输入第二控制信号S2，第一输入端用于输入电源信号ELVDD，第二输入端与第四节点P4相连，输出端与第一节点P1相连；补偿单元013用于在第二控制信号S2的控制下，通过电源信号ELVDD对第一节点P1进行驱动单元014的阈值电压的补偿；The control terminal of the compensation unit 013 is used to input the second control signal S2, the first input terminal is used to input the power supply signal ELVDD, the second input terminal is connected to the fourth node P4, and the output terminal is connected to the first node P1; the compensation unit 013 is used Under the control of the second control signal S2, the threshold voltage of the driving unit 014 is compensated for the first node P1 through the power supply signal ELVDD;
驱动单元014的控制端与第一节点P1相连，输入端与第三节点P3相连，输出端与第四节点P4相连；驱动单元014用于在第一节点P1的控制下，导通第三节点P3和第四节点P4；The control terminal of the driving unit 014 is connected to the first node P1, the input terminal is connected to the third node P3, and the output terminal is connected to the fourth node P4; the driving unit 014 is used to turn on the third node under the control of the first node P1 P3 and the fourth node P4;
控制单元015的控制端用于输入第三控制信号EM，输入端与第四节点P4相连，输出端与发光器件OLED的输入端相连；控制单元015用于在第三控制信号EM的控制下，导通第四节点P4与发光器件OLED的输入端；The control terminal of the control unit 015 is used to input the third control signal EM, the input terminal is connected to the fourth node P4, and the output terminal is connected to the input terminal of the light emitting device OLED; the control unit 015 is used to control the third control signal EM, Turning on the fourth node P4 and the input end of the light emitting device OLED;
电源输入单元016的控制端用于输入第三控制信号EM，输入端用于输入电源信号ELVDD，输出端与第三节点P3相连；电源输入单元016用于在第三控制信号EM的控制下，将电源信号ELVDD输出到第三节点P3。The control end of the power input unit 016 is used to input the third control signal EM, the input end is used to input the power signal ELVDD, and the output end is connected to the third node P3; the power input unit 016 is used to control the third control signal EM, The power signal ELVDD is output to the third node P3.
具体地，本发明实施例提供的上述像素电路中，驱动模块通过复位单元、写入单元、补偿单元、驱动单元、控制单元和电源输入单元，来实现输出驱动电流驱动发光器件发光。Specifically, in the above-mentioned pixel circuit provided by the embodiment of the present invention, the driving module implements the output driving current to drive the light emitting device to emit light through the reset unit, the writing unit, the compensation unit, the driving unit, the control unit and the power input unit.
在具体实施时，本发明实施例提供的上述像素电路中，如图3a所示，电源输入单元016可以包括：第一开关晶体管T1；第一开关晶体管T1的栅极用于输入第三控制信号EM，源极用于输入电源信号ELVDD，漏极与第三节点P3相连。具体地，第一开关晶体管可以在第三控制信号的控制下导通，导通的第一开关晶体管可以将电源信号输出到第三节点。In specific implementation, in the above-mentioned pixel circuit provided by the embodiment of the present invention, as shown in FIG. 3a, the power input unit 016 may include: a first switching transistor T1; the gate of the first switching transistor T1 is used to input the third control signal EM, the source is used to input the power signal ELVDD, and the drain is connected to the third node P3. Specifically, the first switch transistor can be turned on under the control of the third control signal, and the turned-on first switch transistor can output the power signal to the third node.
在具体实施时，本发明实施例提供的上述像素电路中，如图3a所示，写入单元012可以包括：第二开关晶体管T2；第二开关晶体管T2的栅极用于输入第二控制信号S2，源极用于输入数据信号Vdata，漏极与第三节点P3相连。具体地，第二开关晶体管可以在第二控制信号的控制下导通，导通的第二开关晶体管可以将数据信号输出到第三节点。In specific implementation, in the above pixel circuit provided by the embodiment of the present invention, as shown in FIG. 3a, the writing unit 012 may include: a second switching transistor T2; the gate of the second switching transistor T2 is used to input the second control signal S2, the source is used to input the data signal Vdata, and the drain is connected to the third node P3. Specifically, the second switch transistor can be turned on under the control of the second control signal, and the turned-on second switch transistor can output the data signal to the third node.
在具体实施时，本发明实施例提供的上述像素电路中，如图3a所示，驱动单元014可以包括：第三开关晶体管T3；第三开关晶体管T3的栅极与第一节点P1相连，源极与第三节点P3相连，漏极与第四节点P4相连。具体地，第三开关晶体管可以在第一节点的控制下导通，导通的第三开关晶体管可以将第三节点与第四节点导通。In specific implementation, in the above-mentioned pixel circuit provided by the embodiment of the present invention, as shown in FIG. 3 a , the driving unit 014 may include: a third switching transistor T3; The pole is connected to the third node P3, and the drain is connected to the fourth node P4. Specifically, the third switch transistor can be turned on under the control of the first node, and the turned-on third switch transistor can turn on the third node and the fourth node.
在具体实施时，本发明实施例提供的上述像素电路中，如图3a所示，补偿单元013可以包括：第四开关晶体管T4和电容C；其中，第四开关晶体管T4的栅极用于输入第二控制信号S2，源极与第四节点P4相连，漏极与第一节点P1相连；电容C的一端用于输入电源信号ELVDD，另一端与第一节点P1相连。具体地，第四开关晶体管可以在第二控制信号的控制下导通，导通的第四开关晶体管可以将第一节点与第四节点导通。In specific implementation, in the above-mentioned pixel circuit provided by the embodiment of the present invention, as shown in FIG. 3a, the compensation unit 013 may include: a fourth switching transistor T4 and a capacitor C; The source of the second control signal S2 is connected to the fourth node P4, and the drain is connected to the first node P1; one end of the capacitor C is used to input the power supply signal ELVDD, and the other end is connected to the first node P1. Specifically, the fourth switch transistor can be turned on under the control of the second control signal, and the turned-on fourth switch transistor can turn on the first node and the fourth node.
在具体实施时，本发明实施例提供的上述像素电路中，如图3a所示，复位单元011可以包括：第五开关晶体管T5和第六开关晶体管T6；其中，第五开关晶体管T5的栅极用于输入第一控制信号S1，源极用于输入参考信号Vref，漏极与第一节点P1相连；第六开关晶体管T6的栅极用于输入第一控制信号S1，源极用于输入参考信号Vref，漏极与第二节点P2相连。具体地，第五开关晶体管可以在第一控制信号的控制下导通，导通的第五开关晶体管可以将参考信号输出到第一节点；第六开关晶体管可以在第一控制信号的控制下导通，导通的第六开关晶体管可以将参考信号输出到第二节点。In specific implementation, in the above pixel circuit provided by the embodiment of the present invention, as shown in FIG. 3a, the reset unit 011 may include: a fifth switching transistor T5 and a sixth switching transistor T6; It is used to input the first control signal S1, the source is used to input the reference signal Vref, and the drain is connected to the first node P1; the gate of the sixth switching transistor T6 is used to input the first control signal S1, and the source is used to input the reference signal The drain of the signal Vref is connected to the second node P2. Specifically, the fifth switch transistor can be turned on under the control of the first control signal, and the turned-on fifth switch transistor can output the reference signal to the first node; the sixth switch transistor can be turned on under the control of the first control signal When turned on, the turned-on sixth switching transistor can output the reference signal to the second node.
在具体实施时，本发明实施例提供的上述像素电路中，如图3a所示，控制单元015可以包括：第七开关晶体管T7；第七开关晶体管T7的栅极用于输入第三控制信号EM，源极与第四节点P4相连，漏极与发光器件OLED的输入端相连。具体地，第七开关晶体管可以在第三控制信号的控制下导通，导通的第七开关晶体管可以将第四节点与第二节点即发光器件的输入端导通。In specific implementation, in the above pixel circuit provided by the embodiment of the present invention, as shown in FIG. 3a, the control unit 015 may include: a seventh switching transistor T7; the gate of the seventh switching transistor T7 is used to input the third control signal EM , the source is connected to the fourth node P4, and the drain is connected to the input terminal of the light emitting device OLED. Specifically, the seventh switch transistor can be turned on under the control of the third control signal, and the turned-on seventh switch transistor can turn on the fourth node and the second node, that is, the input terminal of the light emitting device.
在具体实施时，本发明实施例提供的上述像素电路中，如图3b所示，驱动模块01可以包括：第一子单元017和第二子单元018；其中，In a specific implementation, in the above pixel circuit provided by the embodiment of the present invention, as shown in FIG. 3b, the driving module 01 may include: a first subunit 017 and a second subunit 018; wherein,
第一子单元017的控制端用于输入扫描信号Gate，输入端用于输入数据信号Vdata，输出端与控制节点PU相连；第一子单元017用于在扫描信号Gate的控制下，将数据信号Vdata输出到控制节点PU；The control terminal of the first subunit 017 is used to input the scan signal Gate, the input terminal is used to input the data signal Vdata, and the output terminal is connected to the control node PU; the first subunit 017 is used to convert the data signal Vdata is output to the control node PU;
第二子单元018的控制端与控制节点PU相连，输入端用于输入电源信号ELVDD，输出端与发光器件OLED的输入端相连；第二子单元018用于在控制节点PU的控制下，通过电源信号ELVDD驱动发光器件OLED发光。The control terminal of the second subunit 018 is connected to the control node PU, the input terminal is used to input the power supply signal ELVDD, and the output terminal is connected to the input terminal of the light emitting device OLED; the second subunit 018 is used to control the control node PU through The power signal ELVDD drives the light emitting device OLED to emit light.
具体地，本发明实施例提供的上述像素电路中，驱动模块可以通过第一子单元和第二子单元输出驱动电流，来实现驱动发光器件发光。Specifically, in the above-mentioned pixel circuit provided by the embodiment of the present invention, the driving module can output a driving current through the first subunit and the second subunit to drive the light emitting device to emit light.
在具体实施时，本发明实施例提供的上述像素电路中，如图3b所示，第一子单元017可以包括：第八开关晶体管T8；第八开关晶体管T8的栅极用于输入扫描信号Gate，源极用于输入数据信号Vdata，漏极与控制节点PU相连。具体地，第八开关晶体管可以在扫描信号的控制下导通，导通的第八开关晶体管可以将数据信号输出到控制节点。In specific implementation, in the above-mentioned pixel circuit provided by the embodiment of the present invention, as shown in FIG. 3b, the first subunit 017 may include: an eighth switching transistor T8; , the source is used to input the data signal Vdata, and the drain is connected to the control node PU. Specifically, the eighth switch transistor can be turned on under the control of the scan signal, and the turned-on eighth switch transistor can output the data signal to the control node.
在具体实施时，本发明实施例提供的上述像素电路中，如图3b所示，第二子单元018可以包括：第九开关晶体管T9和存储电容C；第九开关晶体管T9的栅极与控制节点PU相连，源极用于输入电源信号ELVDD，漏极与发光器件OLED的输入端相连；存储电容C的一端用于输入ELVDD电源信号，另一端与控制节点PU相连。具体地，第九开关晶体管可以在控制节点的控制下导通，导通的第九开关晶体管可以将电源信号输出到发光器件的输入端；发光器件的输出端接入地电源信号ELVSS。In specific implementation, in the above-mentioned pixel circuit provided by the embodiment of the present invention, as shown in FIG. 3b, the second subunit 018 may include: the ninth switching transistor T9 and the storage capacitor C; The node PU is connected, the source is used to input the power signal ELVDD, and the drain is connected to the input terminal of the light emitting device OLED; one end of the storage capacitor C is used to input the ELVDD power signal, and the other end is connected to the control node PU. Specifically, the ninth switching transistor can be turned on under the control of the control node, and the turned-on ninth switching transistor can output a power signal to the input terminal of the light emitting device; the output terminal of the light emitting device is connected to the ground power signal ELVSS.
需要说明的是本发明上述实施例中提到的开关晶体管可以是薄膜晶体管(TFT，Thin Film Transistor)，也可以是金属氧化物半导体场效应管(MOS，Metal OxideSemiconductor)，在此不做限定。在具体实施中，这些晶体管的源极和漏极可以互换，不做具体区分。在描述具体实施例时以薄膜晶体管为例进行说明。另外，如图3a和图3b所示的像素电路结构，输出驱动电流驱动发光器件发光的工作时序与现有技术相同，在此不作详述。且本发明的构思也可以应用于其他的像素点路结构，仅需要在原有的像素结构的基础上，增加一个旁路模块，从而将驱动晶体管的关态电压设置的较小，使驱动模块在暗态时可以输出微量电流以保障响应时间，提高响应速度，改善迟滞效应；同时通过在发光器件的输入、输出端之间连接一个旁路模块，进而通过旁路模块的分流作用使得经过发光器件的电流较小，从而保障暗态下发光器件的亮度足够暗，保证了显示面板的暗态显示亮度。It should be noted that the switching transistor mentioned in the above embodiments of the present invention may be a thin film transistor (TFT, Thin Film Transistor) or a metal oxide semiconductor field effect transistor (MOS, Metal Oxide Semiconductor), which is not limited here. In specific implementation, the sources and drains of these transistors can be interchanged, and no specific distinction is made. When describing specific embodiments, a thin film transistor is taken as an example for illustration. In addition, for the pixel circuit structure shown in FIG. 3a and FIG. 3b , the working sequence of outputting the driving current to drive the light emitting device to emit light is the same as that of the prior art, and will not be described in detail here. Moreover, the concept of the present invention can also be applied to other pixel dot circuit structures. It is only necessary to add a bypass module on the basis of the original pixel structure, so that the off-state voltage of the driving transistor is set smaller, so that the driving module is in In the dark state, a small amount of current can be output to ensure the response time, improve the response speed, and improve the hysteresis effect; at the same time, a bypass module is connected between the input and output terminals of the light-emitting device, and then the shunt function of the bypass module makes the light-emitting device pass through The current is small, so as to ensure that the brightness of the light-emitting device in the dark state is sufficiently dark, and the display brightness of the display panel in the dark state is ensured.
基于同一发明构思，本发明实施例提供了一种显示面板，包括本发明实施例提供的上述像素电路。该显示面板可以应用于手机、平板电脑、电视机、显示器、笔记本电脑、数码相框、导航仪等任何具有显示功能的产品或部件。由于该显示面板解决问题的原理与像素电路相似，因此该显示面板的实施可以参见上述像素电路的实施，重复之处不再赘述。Based on the same inventive concept, an embodiment of the present invention provides a display panel, including the above-mentioned pixel circuit provided by the embodiment of the present invention. The display panel can be applied to any product or component with a display function such as a mobile phone, a tablet computer, a television, a monitor, a notebook computer, a digital photo frame, a navigator, and the like. Since the problem-solving principle of the display panel is similar to that of the pixel circuit, the implementation of the display panel can refer to the implementation of the above-mentioned pixel circuit, and repeated descriptions will not be repeated.
本发明实施例提供了一种像素电路及显示面板，该像素电路包括：驱动模块、旁路模块和发光器件；其中，驱动模块用于向发光器件的输入端输入驱动电流，驱动发光器件发光；旁路模块连接于发光器件的输入端和输出端之间，用于分流驱动模块输入到发光器件的驱动电流。这样可以将驱动模块的关态电压设置较小一点，使驱动模块在暗态时可以输出微量电流以保障响应时间，提高响应速度，改善迟滞效应；同时通过在发光器件的输入、输出端之间连接一个旁路模块，进而通过旁路模块的分流作用使得经过发光器件的电流较小，从而保障暗态下发光器件的亮度足够暗，保证了显示面板的暗态显示亮度。An embodiment of the present invention provides a pixel circuit and a display panel. The pixel circuit includes: a driving module, a bypass module, and a light emitting device; wherein, the driving module is used to input a driving current to an input end of the light emitting device to drive the light emitting device to emit light; The bypass module is connected between the input terminal and the output terminal of the light emitting device, and is used for shunting the driving current input by the driving module to the light emitting device. In this way, the off-state voltage of the driving module can be set a little smaller, so that the driving module can output a small amount of current in the dark state to ensure the response time, improve the response speed, and improve the hysteresis effect; A bypass module is connected, and the shunt effect of the bypass module makes the current passing through the light-emitting device smaller, so as to ensure that the brightness of the light-emitting device in the dark state is sufficiently dark, and the display brightness of the display panel in the dark state is ensured.
显然，本领域的技术人员可以对本发明进行各种改动和变型而不脱离本发明的精神和范围。这样，倘若本发明的这些修改和变型属于本发明权利要求及其等同技术的范围之内，则本发明也意图包含这些改动和变型在内。Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention also intends to include these modifications and variations.
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710586380.5ACN107170409A (en) | 2017-07-18 | 2017-07-18 | A kind of image element circuit and display panel |
| Application Number | Priority Date | Filing Date | Title |
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| CN201710586380.5ACN107170409A (en) | 2017-07-18 | 2017-07-18 | A kind of image element circuit and display panel |
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| CN107170409Atrue CN107170409A (en) | 2017-09-15 |
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| CN201710586380.5APendingCN107170409A (en) | 2017-07-18 | 2017-07-18 | A kind of image element circuit and display panel |
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| CN101630481A (en)* | 2008-07-18 | 2010-01-20 | 三星移动显示器株式会社 | Pixel and organic light emitting display device using the same |
| WO2010061950A1 (en)* | 2008-11-28 | 2010-06-03 | 京セラ株式会社 | Image display device |
| CN103325336A (en)* | 2012-03-19 | 2013-09-25 | 三星显示有限公司 | Organc light emitting diode display |
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| CN104680976A (en)* | 2015-02-09 | 2015-06-03 | 京东方科技集团股份有限公司 | Pixel compensation circuit, display device and driving method |
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| CN108538247A (en)* | 2018-04-23 | 2018-09-14 | 京东方科技集团股份有限公司 | Pixel circuit and its driving method, display panel and display equipment |
| US11355060B2 (en) | 2018-04-23 | 2022-06-07 | Chengdu Boe Optoelectronics Technology Co., Ltd. | Pixel circuit, method of driving pixel circuit, display panel and display device |
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| US11289026B2 (en) | 2019-06-12 | 2022-03-29 | Boe Technology Group Co., Ltd. | Pixel circuit, driving method thereof, display substrate and display device |
| CN110930949A (en)* | 2019-12-17 | 2020-03-27 | 昆山国显光电有限公司 | Pixel circuit and display panel |
| CN111462680A (en)* | 2020-04-22 | 2020-07-28 | 昆山国显光电有限公司 | Pixel circuit, driving method thereof, display panel and display device |
| CN111462680B (en)* | 2020-04-22 | 2022-02-18 | 昆山国显光电有限公司 | Pixel circuit, driving method thereof, display panel and display device |
| CN111462684A (en)* | 2020-05-18 | 2020-07-28 | 武汉华星光电技术有限公司 | Micro L ED display unit and Micro L ED display panel thereof |
| CN115482779A (en)* | 2022-09-26 | 2022-12-16 | 武汉天马微电子有限公司 | Pixel circuit, driving method thereof, and display device |
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| Date | Code | Title | Description |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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| RJ01 | Rejection of invention patent application after publication | Application publication date:20170915 | |
| RJ01 | Rejection of invention patent application after publication |