Emission driving unit, display driving circuit, display device and driving method

Abstract

An emission driving unit, a display driving circuit, a display device, and a driving method, the emission driving unit including a first switch, a second switch, and a third switch, a source of the first switch and a source of the second switch being electrically connected at a first node, a drain of the first switch and a drain of the second switch being electrically connected at a second node, the grid electrode of the third switch is electrically connected with the second node, the first node and the source electrode of the third switch are electrically connected with a first power supply, the second node and the drain electrode of the third switch are electrically connected with a second power supply, the grid electrode of the first switch is used for inputting a first scanning signal, and the grid electrode of the second switch is used for inputting a second scanning signal; the source electrode of the third switch is used for outputting an emission signal, when the first scanning signal and the second scanning signal are both high levels, the emission signal is low level, when one of the first scanning signal and the second scanning signal is high level and the other one is low level, the emission signal is high level, and space occupation is reduced.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to an emission driving unit, a display driving circuit, a display device and a driving method. Background Art

[0002] An organic light emitting diode (OLED) display emits light and realizes display through sub-pixels composed of organic semiconductor materials and luminescent materials driven by electric current. In the prior art, each sub-pixel of the OLED display needs to be driven to emit light through a scanning signal provided by a scanning driving unit (Gate Driver On Array, GOA) unit and an emission signal provided by an emission driving unit (Emit gate Driver On Array, EOA) unit, wherein the EOA unit is usually composed of multiple driving switches and capacitors, and there are problems such as complex structure of the EOA unit and large space occupation. Summary of the invention

[0003] The purpose of the present application is to provide an emission driving unit, a display driving circuit, a display device and a driving method to solve the problems of complex structure and large space occupation of the EOA unit.

[0004] To achieve the purpose of this application, this application provides the following technical solutions:

[0005] In a first aspect, the present invention provides an emission driving unit for a display driving circuit, the emission driving unit comprising a first switch, a second switch and a third switch, the source of the first switch and the source of the second switch are electrically connected at a first node, the drain of the first switch and the drain of the second switch are electrically connected at a second node, the gate of the third switch is electrically connected to the second node, the first node and the source of the third switch are both used to be electrically connected to a first power supply, the second node and the drain of the third switch are both used to be electrically connected to a second power supply, the gate of the first switch is used to input a first scan signal, the gate of the second switch is used to input a second scan signal, and the source of the third switch is used to output an emission signal; wherein, when the first scan signal and the second scan signal are both high level, the emission signal is low level; when one of the first scan signal and the second scan signal is high level and the other is low level, the emission signal is high level.

[0006] In one implementation, at least one of the first switch, the second switch, and the third switch is a P-type thin film transistor.

[0007] In one embodiment, the transmitting drive unit further includes a first resistor and a second resistor, the first resistor is electrically connected to the first node and the first power supply, and the second resistor is electrically connected to the source of the third switch and the first power supply; and / or, the transmitting drive unit further includes a third resistor and a fourth resistor, the third resistor is electrically connected to the second node and the second power supply, and the fourth resistor is electrically connected to the drain of the third switch and the second power supply.

[0008] In one embodiment, the emission driving unit further includes X parallel control switches, the source of each control switch is electrically connected to the first node, the drain of each control switch is electrically connected to the second node, and the gate of each control switch is used to input a control scan signal; when the first scan signal, the second scan signal, and the X control scan signals are all high levels, the emission signal is low level, when the first scan signal, the second scan signal, and at least one of the X control scan signals are low levels, the emission signal is high level, and X is a positive integer.

[0009] In a second aspect, the present invention further provides a display driving circuit, comprising N+1 cascade-connected scanning driving units and N emission driving units described in any one of the embodiments of the first aspect, the nth scanning driving unit is used to output the first scanning signal to the nth emission driving unit, and the n-1th scanning driving unit is used to output the second scanning signal to the nth emission driving unit, N≥1 and N is an integer, 1<n<N and n is an integer.

[0010] In one embodiment, the emission driving unit further includes X control switches connected in parallel, the source of each of the control switches is electrically connected to the first node, and the drain of each of the control switches is electrically connected to the second node; X of the N+1 scan driving units are used to output control scan signals to the gates of the X control switches in a one-to-one correspondence, where X is a positive integer.

[0011] In one embodiment, the display driving circuit further includes N*M pixel driving units arranged in an array, the nth scanning driving unit is electrically connected to the M pixel driving units on the nth row, the nth emission driving unit is electrically connected to the M pixel driving units on the nth row, M≥1 and M is an integer.

[0012] In a third aspect, the present invention further provides a display device, characterized by comprising a display driving circuit as described in any one of the various implementations of the second aspect.

[0013] In a fourth aspect, the present invention further provides a driving method, which is applied to the display driving circuit described in any one of the various embodiments of the second aspect, wherein the driving method sequentially passes through a first time period, a second time period, and a third time period in a driving cycle, and the driving method comprises: in the first time period, the nth scanning driving unit outputs a first scanning signal of a high level to the nth emission driving unit, and the n-1th scanning driving unit outputs a second scanning signal of a low level to the nth emission driving unit, so that the emission signal output by the nth emission driving unit is a high level; in the second time period, the nth scanning driving unit The first scanning signal of low level is output to the nth emission driving unit, and the n-1th scanning driving unit outputs the second scanning signal of high level to the nth emission driving unit, so that the emission signal output by the nth emission driving unit is high level; in the third time period, the nth scanning driving unit outputs the first scanning signal of high level to the nth emission driving unit, and the n-1th scanning driving unit outputs the second scanning signal of high level to the nth emission driving unit, so that the emission signal output by the nth emission driving unit is low level.

[0014] In one embodiment, the emission driving unit further includes X control switches connected in parallel, the source of each control switch is electrically connected to the first node, the drain of each control switch is electrically connected to the second node, and X of the N+1 scan driving units are used to output control scan signals to the gates of the X control switches in a one-to-one correspondence, where X is a positive integer; the driving method also passes through a widening period within one of the driving cycles, and within the widening period, the nth scan driving unit outputs the first scan signal of a high level to the nth emission driving unit, the n-1th scan driving unit outputs the second scan signal of a high level to the nth emission driving unit, and at least one of the X control scan signals is a low level, so that the emission signal output by the nth emission driving unit is a high level.

[0015] By setting an emission driving unit, the emission driving unit includes a first switch, a second switch and a third switch, a source of the first switch and a source of the second switch are electrically connected at a first node, a drain of the first switch and a drain of the second switch are electrically connected at a second node, a gate of the third switch is electrically connected to the second node, the first node and the source of the third switch are both used to be electrically connected to a first power supply, the second node and the drain of the third switch are both used to be electrically connected to a second power supply, the gate of the first switch is used to input a first scan signal, the gate of the second switch is used to input a second scan signal, and the source of the third switch is used to output an emission signal. When the first scan signal and the second scan signal are both high levels, the emission signal is low level; when one of the first scan signal and the second scan signal is high level and the other is low level, the emission signal is high level, so that the emission driving unit can output the emission signal through fewer switching elements, the structure of the emission driving unit is simple, and the space occupancy is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the implementation methods of the present application or the technical solutions in the prior art, the drawings required for use in the implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 is a circuit diagram of a comparative example transmitting drive unit;

[0018] Figure 2 is a schematic diagram of a transmission drive unit of an embodiment;

[0019] Figure 3 is a potential diagram of a transmit drive unit of an embodiment;

[0020] Figure 4 is a schematic diagram of a transmission drive unit of another embodiment;

[0021] Figure 5 is a potential diagram of a transmitting driving unit of another embodiment;

[0022] Figure 6 is a schematic diagram of a transmission drive unit of another embodiment;

[0023] Figure 7 is a potential diagram of a transmitting driving unit of another embodiment;

[0024] Figure 8 is a schematic diagram of a transmission drive unit of another embodiment;

[0025] Fig. 9is a potential diagram of a transmitting driving unit of another embodiment;

[0026] Fig.10 is a schematic diagram of a display driving circuit of an embodiment;

[0027] Fig.11 is a schematic diagram of a display device according to an embodiment.

[0028] Description of reference numerals:

[0029] 1000-display device, 100-display driving circuit, EOA-emission driving unit, T1-first switch, T2-second switch, T3-third switch, T4-fourth switch, T5-fifth switch, Q1-first node, Q2-second node, Q3-third node, R1-first resistor, R2-second resistor, R3-third resistor, R4-fourth resistor, V1-first power supply, V2-second power supply, GOA-scanning driving unit, P-pixel driving unit, L-emission line, CLK1-first clock signal line, CLK2-second clock signal line, SC-timing control circuit, SCAN n -The first scanning signal, SCAN n-1 - The second scanning signal, SCAN n-2 -The third scanning signal, SCAN n+1 - fourth scanning signal, EM - emission signal, t1 - first period, t2 - second period, t3 - third period, t4 - first widening period, t5 - second widening period, A - display area, B - non-display area, 200 - housing, 201 - display window. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0031] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there can be a central component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there can be a central component at the same time.

[0032] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used in this application and in the specification are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in this application includes any and all combinations of one or more of the related listed items.

[0033] In conjunction with the accompanying drawings, some embodiments of the present application are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0034] Please refer to Figure 2 and Figure 3 The present invention provides an emission driving unit EOA, which is used for a display driving circuit 100. The emission driving unit EOA includes a first switch T1, a second switch T2 and a third switch T3. The source of the first switch T1 and the source of the second switch T2 are electrically connected at a first node Q1, the drain of the first switch T1 and the drain of the second switch T2 are electrically connected at a second node Q2, the gate of the third switch T3 is electrically connected to the second node Q2, the sources of the first node Q1 and the third switch T3 are both used to be electrically connected to a first power supply V1, the second node Q2 and the drain of the third switch T3 are both used to be electrically connected to a second power supply V2, and the gate of the first switch T1 is used to input a first scan signal SCAN n The gate of the second switch T2 is used to input the second scan signal SCAN n-1 , the source of the third switch T3 is used to output the emission signal EM, wherein when the first scan signal SCAN n and the second scanning signal SCAN n-1 When both are high level, the emission signal EM is low level. n and the second scanning signal SCAN n-1 When one of them is at a high level and the other is at a low level, the emission signal EM is at a high level.

[0035] Optionally, the first scanning signal SCAN n The second scanning signal SCANn-1 is provided by two scanning driving units GOA electrically connected to the emission driving unit EOA. Optionally, the source of the third switch T3 is connected to an emission line L, and the emission line L and the source of the third switch T3 are connected to a third node Q3, and the emission line L is used to transmit the emission signal EM. Optionally, the emission line L is electrically connected to the pixel driving unit P, and the pixel driving unit P is used to generate an emission signal EM according to the first scanning signal SCANn-1. n And the emission signal EM is used for resetting, charging and emitting light.

[0036] Specifically, the first power supply V1 outputs a low level, and the second power supply V2 outputs a high level. n and the second scanning signal SCAN n-1 When both are high level, the first switch T1 and the second switch T2 are both turned off, the second power supply V2 outputs a high level to the gate of the third switch T3 to turn off the third switch T3, and the low level output by the first power supply V1 is output through the source of the third switch T3 and the emission line L to form a low level emission signal EM. n and the second scanning signal SCAN n-1 When one of the first switch T1 and the second switch T2 is at a high level and the other is at a low level, one of the first switch T1 and the second switch T2 is turned on and the other is turned off. At this time, the second node Q2 is at a low level to turn on the third switch T3. The high level of the second power supply V2 passes through the third switch T3 and is output from the source of the third switch T3 and the emission line L to form an emission signal EM of a high level.

[0037] Among them, when the first scanning signal SCAN n is low level, the second scanning signal SCAN n-1 When the first scanning signal SCAN is high, the emission signal EM is high, and the pixel driving unit P is in the reset stage; n is high level, the second scanning signal SCAN n-1 When the first scanning signal SCAN is low, the emission signal EM is high, and the pixel driving unit P is in the charging stage. n and the second scanning signal SCAN n-1 When both are high level, the emission signal EM is low level, and the pixel driving unit P is in the light emitting stage.

[0038] Please refer to Figure 1 , Figure 1 is a circuit diagram of an emission driving unit in a comparative technology. The EOA unit in the comparative technology includes 10 thin film transistors and 3 capacitors, which control the output emission signal EM through 2 clock signal lines.

[0039] By setting the emission driving unit EOA, the emission driving unit EOA includes a first switch T1, a second switch T2 and a third switch T3, the source of the first switch T1 and the source of the second switch T2 are electrically connected at a first node Q1, the drain of the first switch T1 and the drain of the second switch T2 are electrically connected at a second node Q2, the gate of the third switch T3 is electrically connected to the second node Q2, the source of the first node Q1 and the third switch T3 are both used to be electrically connected to the first power supply V1, the second node Q2 and the drain of the third switch T3 are both used to be electrically connected to the second power supply V2, and the gate of the first switch T1 is used to input a first scan signal SCAN nThe gate of the second switch T2 is used to input the second scan signal SCAN n-1 The source of the third switch T3 is used to output the emission signal EM. When the first scan signal SCAN n and the second scanning signal SCAN n-1 When both are high level, the emission signal EM is low level; when the first scanning signal SCAN n and the second scanning signal SCAN n-1 When one of them is at a high level and the other is at a low level, the emission signal EM is at a high level, so that the emission driving unit EOA can output the emission signal EM through fewer switching elements. The structure of the emission driving unit EOA is simple, and the space occupation is reduced.

[0040] Please refer to Figure 2 At least one of the first switch T1, the second switch T2 and the third switch T3 is a P-type thin film transistor. Optionally, at least one of the first switch T1, the second switch T2 and the third switch T3 may also be a P-type MOS transistor, without limitation.

[0041] In one embodiment, the first switch T1, the second switch T2 and the third switch T3 are all P-type thin film transistors. When the gate of the first switch T1, the gate of the second switch T2 and the gate of the third switch T3 are input with a high level, the first switch T1, the second switch T2 and the third switch T3 are closed. When the gate of the first switch T1, the gate of the second switch T2 and the gate of the third switch T3 are input with a low level, the first switch T1, the second switch T2 and the third switch T3 are opened. Compared with the P-type MOS transistor, the P-type thin film transistor can be manufactured in the same process with other thin film transistors in the display driving circuit 100, which reduces the manufacturing process difficulty and manufacturing process of the display driving circuit 100. In addition, compared with the P-type MOS transistor, the P-type thin film transistor has lower material cost and preparation temperature.

[0042] Please refer to Figure 2 The emission drive unit EOA also includes a first resistor R1 and a second resistor R2, the first resistor R1 is electrically connected to the first node Q1 and the first power supply V1, and the second resistor R2 is electrically connected to the source of the third switch T3 and the first power supply V1; and / or, the emission drive unit EOA also includes a third resistor R3 and a fourth resistor R4, the third resistor R3 is electrically connected to the second node Q2 and the second power supply V2, and the fourth resistor R4 is electrically connected to the drain of the third switch T3 and the second power supply V2.

[0043] Specifically, when the first scanning signal SCAN n and the second scanning signal SCAN n-1When the first scan signal SCAN is high, the first switch T1, the second switch T2 and the third switch T3 are all closed, and the first power supply V1 and the second power supply V2 are disconnected. n and the second scanning signal SCAN n-1 When one of them is at a high level and the other is at a low level, one of the first switch T1 and the second switch T2 is turned on, and the third switch T3 is turned on. At this time, the first power supply V1 and the second power supply V2 are connected, and the current between the first power supply V1 and the second power supply V2 passes through the first resistor R1 and the second resistor R2, and / or, the current between the first power supply V1 and the second power supply V2 passes through the third resistor R3 and the fourth resistor R4, so as to avoid the first power supply V1 and the second power supply V2 being broken and causing damage to the first power supply V1 and the second power supply V2 and the line. Optionally, the emission drive unit EOA includes a first resistor R1, a second resistor R2, a third resistor R3 and a fourth resistor R4.

[0044] Please refer to Figures 4 to 9 The emission drive unit EOA further includes X parallel control switches, the source of each control switch is electrically connected to the first node Q1, the drain of each control switch is electrically connected to the second node Q2, and the gate of each control switch is used to input a control scan signal; when the first scan signal SCAN n , the second scanning signal SCAN n-1 When the first scanning signal SCAN and the X control scanning signals are high level, the emission signal EM is low level. n , the second scanning signal SCAN n-1 When at least one of the X control scanning signals is at a low level, the emission signal EM is at a high level, and X is a positive integer.

[0045] In one embodiment, please refer to Figure 4 and Figure 5 , the control switch includes a fourth switch T4, and the control scan signal includes a third scan signal SCAN n-2 The gate of the fourth switch T4 is used to input the third scan signal SCAN n-2 When the first scan signal SCAN n , the second scanning signal SCAN n-1 and the third scanning signal SCAN n-2 When all are high level, the first switch T1, the second switch T2 and the fourth switch T4 are all closed, the second power supply V2 outputs a high level to the gate of the third switch T3 to close the third switch T3, and the low level output by the first power supply V1 is output through the source of the third switch T3 and the emission line L to form a low level emission signal EM. n , the second scanning signal SCAN n-1 and the third scanning signal SCANn-2 When at least one of the first switch T1, the second switch T2 and the fourth switch T4 is at a low level, at least one of the first switch T1, the second switch T2 and the fourth switch T4 is turned on. At this time, the second node Q2 is at a low level to turn on the third switch T3. The high level of the second power supply V2 passes through the third switch T3 and is output from the source of the third switch T3 and the emission line L to form an emission signal EM of a high level.

[0046] Among them, when the third scanning signal SCAN n-2 is low level, the first scanning signal SCAN n and the second scanning signal SCAN n-1 When the third scanning signal SCAN is high, the emission signal EM is high. At this time, the pixel driving unit P is in the first silent stage without resetting, charging and emitting light, so as to prevent the pixel driving unit P from running prematurely and causing display abnormality. n-2 is high level, the first scanning signal SCAN n is low level, the second scanning signal SCAN n-1 When the third scanning signal SCAN is high, the emission signal EM is high, and the pixel driving unit P is in the reset stage; n-2 is high level, the first scanning signal SCAN n is high level, the second scanning signal SCAN n-1 When the third scanning signal SCAN is low, the emission signal EM is high, and the pixel driving unit P is in the charging stage. n-2 , the first scanning signal SCAN n and the second scanning signal SCAN n-1 When both are high level, the emission signal EM is low level, and the pixel driving unit P is in the light emitting stage.

[0047] In another embodiment, please refer to Figure 6 and Figure 7 , the control switch includes a fifth switch T5, and the control scan signal includes a fourth scan signal SCAN n+1 The gate of the fifth switch T5 is used to input the fourth scan signal SCAN n+1 When the first scan signal SCAN n , the second scanning signal SCAN n-1 and the fourth scanning signal SCAN n+1 When all are high level, the first switch T1, the second switch T2 and the fifth switch T5 are all closed, the second power supply V2 outputs a high level to the gate of the third switch T3 to close the third switch T3, and the low level output by the first power supply V1 is output through the source of the third switch T3 and the emission line L to form a low level emission signal EM. n , the second scanning signal SCANn-1 and the fourth scanning signal SCAN n+1 When at least one of the first switch T1, the second switch T2 and the fifth switch T5 is at a low level, at least one of the first switch T1, the second switch T2 and the fifth switch T5 is turned on. At this time, the second node Q2 is at a low level to turn on the third switch T3. The high level of the second power supply V2 passes through the third switch T3 and is output from the source of the third switch T3 and the emission line L to form an emission signal EM of a high level.

[0048] Among them, the first scanning signal SCAN n is low level, the second scanning signal SCAN n-1 and the fourth scanning signal SCAN n+1 When both are high level, the emission signal EM is high level, and the pixel driving unit P is in the reset stage; the first scanning signal SCAN n and the fourth scanning signal SCAN n+1 Both are high level, the second scanning signal SCAN n-1 When the first scanning signal SCAN is low, the emission signal EM is high, and the pixel driving unit P is in the charging stage. n and the second scanning signal SCAN n-1 Both are high level, the fourth scanning signal SCAN n+1 When the first scanning signal SCAN is low, the emission signal EM is high. At this time, the pixel driving unit P is in the second silent stage and does not emit light, so as to prevent the pixel driving unit P from running prematurely and causing display abnormality. n , the second scanning signal SCAN n-1 and the fourth scanning signal SCAN n+1 When both are high level, the emission signal EM is low level, and the pixel driving unit P is in the light emitting stage.

[0049] In another embodiment, please refer to Figure 8 and Fig. 9 , the control switch includes a fourth switch T4 and a fifth switch T5, and the control scan signal includes a third scan signal SCAN n-2 and the fourth scanning signal SCAN n+1 The gate of the fourth switch T4 is used to input the third scan signal SCAN n-2 The gate of the fifth switch T5 is used to input the fourth scan signal SCAN n+1 When the first scan signal SCAN n , the second scanning signal SCAN n-1 , the third scanning signal SCAN n-2 and the fourth scanning signal SCAN n+1When all are high level, the first switch T1, the second switch T2, the fourth switch T4 and the fifth switch T5 are all closed, the second power supply V2 outputs a high level to the gate of the third switch T3 to close the third switch T3, and the low level output by the first power supply V1 is output through the source of the third switch T3 and the emission line L to form a low level emission signal EM. n , the second scanning signal SCAN n-1 , the third scanning signal SCAN n-2 and the fourth scanning signal SCAN n+1 When at least one of the first switch T1, the second switch T2, the fourth switch T4 and the fifth switch T5 is at a low level, at least one of the first switch T1, the second switch T2, the fourth switch T4 and the fifth switch T5 is turned on. At this time, the second node Q2 is at a low level to turn on the third switch T3. The high level of the second power supply V2 passes through the third switch T3 and is output from the source of the third switch T3 and the emission line L to form an emission signal EM of a high level.

[0050] Among them, when the third scanning signal SCAN n-2 is low level, the first scanning signal SCAN n , the second scanning signal SCAN n-1 and the fourth scanning signal SCAN n+1 When both are high level, the emission signal EM is high level, and the pixel driving unit P is in the first silent stage without resetting, charging and emitting light, so as to prevent the pixel driving unit P from running prematurely and causing display abnormality; when the second scanning signal SCAN n-1 , the third scanning signal SCAN n-2 and the fourth scanning signal SCAN n+1 Both are high level, the first scanning signal SCAN n When the first scanning signal SCAN is low, the emission signal EM is high, and the pixel driving unit P is in the reset stage. n , the third scanning signal SCAN n-2 and the fourth scanning signal SCAN n+1 Both are high level, the second scanning signal SCAN n-1 When the first scanning signal SCAN is low, the emission signal EM is high, and the pixel driving unit P is in the charging stage. n , the second scanning signal SCAN n-1 and the third scanning signal SCAN n-2 Both are high level, the fourth scanning signal SCAN n+1 When the first scanning signal SCAN is low, the emission signal EM is high. At this time, the pixel driving unit P is in the second silent stage and does not emit light, so as to prevent the pixel driving unit P from running prematurely and causing display abnormality. n , the second scanning signal SCANn-1 , the third scanning signal SCAN n-2 and the fourth scanning signal SCAN n+1 When both are high level, the emission signal EM is low level, and the pixel driving unit P is in the light emitting stage.

[0051] Optionally, the control switch includes the aforementioned fourth switch T4, the aforementioned fifth switch T5 and at least one switch, without limitation.

[0052] Please refer to Fig.10 The present invention also provides a display driving circuit 100, comprising N+1 cascade-connected scanning driving units GOA and N emission driving units EOA in the embodiment of the present invention, wherein the nth scanning driving unit GOA is used to transmit the nth emission driving unit EOA n Output the first scanning signal SCAN n , the n-1th scanning driving unit GOA is used to send a signal to the nth transmitting driving unit EOA n Output the second scanning signal SCAN n-1 , N≥1 and N is an integer, 1<n<N and n is an integer.

[0053] Among them, the N+1 scanning driving units GOA are numbered GOA1, GOA2, ..., GOA3 from top to bottom. n-1 、GOA n 、GOA n+1 、GOA n+2 、GOA n+3 , …, GOA N 、GOA N+1 , N transmitting drive units EOA are numbered EOA1, EOA2, ..., EOA from top to bottom. n-1 , EOA n , EOA n+1 , EOA n+2 , EOA n+3 , …, EOA N The nth scanning drive unit GOA is used to send a signal to the nth transmitting drive unit EOA. n The gate of the first switch T1 outputs the first scan signal SCAN n , the n-1th scanning driving unit GOA is used to send signals to the nth transmitting driving unit EOA n The gate of the second switch T2 outputs the second scan signal SCAN n-1 .

[0054] Optionally, N+1 scan drive units GOA are cascade-connected via a first clock signal line CLK1 and a second clock signal line CLK2, both of which are electrically connected to a timing control circuit SC, which is used to output clock signals to the N+1 scan drive units GOA via the first clock signal line CLK1 and the second clock signal line CLK2, and each scan drive unit GOA is used to generate a scan signal according to a corresponding clock signal and input it to a corresponding emission drive unit EOA to generate an emission signal EM. Optionally, the odd-numbered scan drive units GOA are electrically connected to the first clock signal line CLK1, and the even-numbered scan drive units GOA are electrically connected to the second clock signal line CLK2.

[0055] Specifically, the first scanning driving unit GOA is used to start the scanning process, the first scanning driving unit GOA and the second scanning driving unit GOA respectively output scanning signals to the first emission driving unit EOA so that the first emission driving unit EOA outputs the first emission signal EM1, the second scanning driving unit GOA and the third scanning driving unit GOA respectively output scanning signals to the second emission driving unit EOA so that the second emission driving unit EOA outputs the second emission signal EM2, and so on, which will not be repeated.

[0056] The display driving circuit 100 provided by the present invention is provided with N+1 cascade-connected scanning driving units GOA and N emission driving units EOA in the embodiment of the present invention, and the nth scanning driving unit GOA is used to transmit the nth emission driving unit EOA to the nth emission driving unit n Output the first scanning signal SCAN n , the n-1th scanning driving unit GOA is used to send signals to the nth transmitting driving unit EOA n Output the second scanning signal SCAN n-1 , N≥1 and N is an integer, 1<n<N and n is an integer, the function of generating the emission signal EM through the scanning signal is realized, so that the structure of the display driving circuit 100 is simple and the number of components of the display driving circuit 100 is reduced.

[0057] Please refer to Fig.10 The emission driving unit EOA further includes X parallel control switches, the source of each control switch is electrically connected to the first node Q1, and the drain of each control switch is electrically connected to the second node Q2. The X scanning driving units GOA in the N+1 scanning driving units GOA are used to output control scanning signals to the gates of the X control switches in a one-to-one correspondence, and X is a positive integer.

[0058] Specifically, the control switch includes a fourth switch T4 and / or a fifth switch T5, and the n-2 th scanning driving unit GOA is used to send a signal to the n th emission driving unit EOA. n Output the third scanning signal SCAN n-2 , and / or, the n+1th scanning driving unit GOA is used to send a signal to the nth transmitting driving unit EOA n Output the fourth scanning signal SCAN n+1 .

[0059] In one implementation, please refer to Figure 4 and Figure 5 The control switch includes a fourth switch T4, a source of the fourth switch T4 is electrically connected to the first node Q1, a drain of the fourth switch T4 is electrically connected to the second node Q2, and the n-2 scan driving unit GOA is used to send a signal to the n emission driving unit EOA. n The gate of the fourth switch T4 outputs the third scan signal SCAN n-2 . Among them, when the third scanning signal SCAN n-2 is low level, the first scanning signal SCAN n and the second scanning signal SCAN n-1 When both are high level, the transmitting signal EM is high level, and at this time, it is connected to the nth transmitting driving unit EOA. n The electrically connected pixel driving unit P is in the first silent stage without resetting, charging and emitting light, so as to prevent the pixel driving unit P from running prematurely and causing display abnormality; when the third scanning signal SCAN n-2 is high level, the first scanning signal SCAN n is low level, the second scanning signal SCAN n-1 When it is high level, the transmitting signal EM is high level, and at this time it is connected to the nth transmitting driving unit EOA n The electrically connected pixel driving unit P is in the reset stage; when the third scanning signal SCAN n-2 is high level, the first scanning signal SCAN n is high level, the second scanning signal SCAN n-1 When it is low level, the transmitting signal EM is high level, and at this time it is connected to the nth transmitting driving unit EOA n The electrically connected pixel driving unit P is in the charging stage; when the third scanning signal SCAN n-2 , the first scanning signal SCAN n and the second scanning signal SCAN n-1 When both are high level, the transmitting signal EM is low level, and at this time, it is connected to the nth transmitting driving unit EOA. n The electrically connected pixel driving unit P is in a light emitting stage.

[0060] In another embodiment, please refer to Figure 6 and Figure 7 The control switch includes a fifth switch T5, the source of the fifth switch T5 is electrically connected to the first node Q1, the drain of the fifth switch T5 is electrically connected to the second node Q2, and the n+1th scanning driving unit GOA is used to send a signal to the nth emission driving unit EOA. n The gate of the fifth switch T5 outputs the fourth scan signal SCAN n+1 Among them, the first scanning signal SCAN n is low level, the second scanning signal SCAN n-1 and the fourth scanning signal SCAN n+1 When both are high level, the transmitting signal EM is high level, and at this time, it is connected to the nth transmitting driving unit EOA. n The electrically connected pixel driving unit P is in the reset stage; the first scanning signal SCAN n and the fourth scanning signal SCAN n+1 Both are high level, the second scanning signal SCAN n-1 When it is low level, the transmitting signal EM is high level, and at this time it is connected to the nth transmitting driving unit EOA n The electrically connected pixel driving unit P is in the charging stage; when the first scanning signal SCAN n and the second scanning signal SCAN n-1 Both are high level, the fourth scanning signal SCAN n+1 When it is low level, the transmitting signal EM is high level, and at this time it is connected to the nth transmitting driving unit EOA n The electrically connected pixel driving unit P is in the second silent stage and does not emit light, so as to prevent the pixel driving unit P from running prematurely and causing display abnormality; when the first scanning signal SCAN n , the second scanning signal SCAN n-1 and the fourth scanning signal SCAN n+1 When both are high level, the transmitting signal EM is low level, and at this time, it is connected to the nth transmitting driving unit EOA. n The electrically connected pixel driving unit P is in a light emitting stage.

[0061] In another embodiment, please refer to Figure 8 and Fig. 9 The control switch includes a fourth switch T4 and a fifth switch T5, the source of the fourth switch T4 is electrically connected to the first node Q1, the drain of the fourth switch T4 is electrically connected to the second node Q2, and the n-2 scan driving unit GOA is used to send a signal to the n emission driving unit EOA. n The gate of the fourth switch T4 outputs the third scan signal SCAN n-2The source of the fifth switch T5 is electrically connected to the first node Q1, the drain of the fifth switch T5 is electrically connected to the second node Q2, and the n+1th scanning driving unit GOA is used to transmit the nth emission driving unit EOA n The gate of the fifth switch T5 outputs the fourth scan signal SCAN n+1 . Among them, when the third scanning signal SCAN n-2 is low level, the first scanning signal SCAN n , the second scan signal SCANn-1 and the fourth scan signal SCAN n+1 When both are high level, the transmitting signal EM is high level, and at this time, it is connected to the nth transmitting driving unit EOA. n The electrically connected pixel driving unit P is in the first silent stage without resetting, charging and emitting light, so as to prevent the pixel driving unit P from running prematurely and causing display abnormality; when the second scanning signal SCAN n-1 , the third scanning signal SCAN n-2 and the fourth scanning signal SCAN n+1 Both are high level, the first scanning signal SCAN n When it is low level, the transmitting signal EM is high level, and at this time it is connected to the nth transmitting driving unit EOA n The electrically connected pixel driving unit P is in the reset stage; when the first scanning signal SCAN n , the third scanning signal SCAN n-2 and the fourth scanning signal SCAN n+1 Both are high level, the second scanning signal SCAN n-1 When it is low level, the transmitting signal EM is high level, and at this time it is connected to the nth transmitting driving unit EOA n The electrically connected pixel driving unit P is in the charging stage; when the first scanning signal SCAN n , the second scanning signal SCAN n-1 and the third scanning signal SCAN n-2 Both are high level, the fourth scanning signal SCAN n+1 When it is low level, the transmitting signal EM is high level, and at this time it is connected to the nth transmitting driving unit EOA n The electrically connected pixel driving unit P is in the second silent stage and does not emit light, so as to prevent the pixel driving unit P from running prematurely and causing display abnormality; when the first scanning signal SCAN n , the second scanning signal SCAN n-1 , the third scanning signal SCAN n-2 and the fourth scanning signal SCAN n+1 When both are high level, the transmitting signal EM is low level, and at this time, it is connected to the nth transmitting driving unit EOA. n The electrically connected pixel driving unit P is in a light emitting stage.

[0062] Optionally, the control switch includes the aforementioned fourth switch T4, the aforementioned fifth switch T5 and at least one switch, without limitation.

[0063] Please refer to Fig.10 The display driving circuit 100 further includes N*M pixel driving units P arranged in an array, the nth scanning driving unit GOA is electrically connected to the M pixel driving units P on the nth row, and the nth emission driving unit EOA is electrically connected to the M pixel driving units P on the nth row. n The M pixel driving units P on the n-th row are all electrically connected, where M≥1 and M is an integer.

[0064] Among them, N*M pixel driving units P are arranged in N rows and M columns, and the M pixel driving units P in the first row are labeled P from left to right. 1,1 ,…,P 1,m ,…,P 1,M The M pixel driving units P in the n-1th row are labeled P from left to right. n-1,1 ,…,P n-1,m ,…,P n-1,M The M pixel driving units P in the nth row are labeled P from left to right. n,1 ,…,P n,m ,…,P n,M The M pixel driving units P in the n+1th row are labeled P from left to right. n+1,1 ,…,P n+1,m ,…,P n+1,M The M pixel driving units P in the n+2th row are labeled P from left to right. n+2,1 ,…,P n+2,m ,…,P n+2,M , and so on to the Nth row, the M pixel driving units P are labeled P from left to right. N,1 ,…,P N,m ,…,P N,M , where 1<m<M and M is an integer.

[0065] Specifically, the nth scan driving unit GOA outputs the first scan signal SCAN to each of the M pixel driving units P on the nth row. n The n-1th scanning driving unit GOA outputs a second scanning signal SCAN to each of the M pixel driving units P on the nth row. n-1 , the nth transmitting drive unit EOA n The emission signal EM is output to each of the M pixel driving units P on the nth row, and each of the M pixel driving units P on the nth row is used to generate an emission signal EM according to the first scan signal SCAN. n , the second scanning signal SCAN n-1and the emission signal EM to reset, charge and drive the organic light emitting diode to emit light. Optionally, the display driving circuit 100 includes a display area A and a non-display area BA, N+1 scanning driving units GOA and N emission driving units EOA and the aforementioned timing control circuit SC are all located in the non-display area, and N*M pixel driving units P are all located in the display area A.

[0066] Please refer to Fig.11 The present invention provides a display device 1000, comprising a display driving circuit 100 in an embodiment of the present invention. Optionally, the display device 1000 further comprises a housing 200, the housing 200 having a display window 201, the aforementioned timing control circuit SC and the display driving circuit 100 are both contained in the housing 200, the display driving circuit 100 comprises a display area A and a non-display area BA, the display area A is exposed from the display window 201 for display, and the timing control circuit SC and the non-display area BA are both shielded and hidden by the housing 200. Since the emission driving unit EOA of the display driving circuit 100 in the embodiment of the present invention reduces the number of switching elements compared to the EOA unit of the comparative technology, and the smaller volume of the resistor has less effect on the volume of the emission driving unit EOA, the non-display area BA of the display driving circuit 100 in the embodiment of the present invention is reduced, the display area A is increased, and the proportion of the display window 201 of the display device 1000 to the housing 200 is expanded, and a narrow frame design is achieved.

[0067] Please refer to Figure 2 and Figure 3 The present invention further provides a driving method, which is applied to the display driving circuit 100 in the embodiment of the present invention. The driving method sequentially passes through a first time period t1, a second time period t2 and a third time period t3 in a driving cycle. The driving method includes:

[0068] In the first time period t1, the nth scanning driving unit GOA sends a signal to the nth emission driving unit EOA. n The first scanning signal SCAN outputted as a high level n , the n-1th scanning driving unit GOA sends a signal to the nth transmitting driving unit EOA n The second scan signal SCAN outputted as a low level n-1 , so that the nth transmitting drive unit EOA n Specifically, the first period t1 corresponds to the reset phase of the M pixel driving units P on the nth row. During this period, the nth scanning driving unit GOA sends a signal to the nth emission driving unit EOA under the control of the aforementioned timing control circuit SC. n The M pixel driving units P on the nth row output a first scanning signal SCAN of a high level. n, the n-1th scanning driving unit GOA sends a signal to the nth transmitting driving unit EOA n The M pixel driving units P on the nth row output a second scanning signal SCAN of low level. n-1 , the nth transmitting drive unit EOA n The first switch T1 is closed and the second switch T3 is opened so that the nth emission driving unit EOA n The emission signal EM at a high level is output to the M pixel driving units P on the n-th row.

[0069] In the second period t2, the nth scanning driving unit GOA sends a signal to the nth emission driving unit EOA. n The first scanning signal SCAN outputted as a low level n , the n-1th scanning driving unit GOA sends a signal to the nth transmitting driving unit EOA n The second scanning signal SCAN outputted as a high level n-1 , so that the nth transmitting drive unit EOA n Specifically, the second period t2 corresponds to the charging stage of the M pixel driving units P on the nth row. During this period, the nth scanning driving unit GOA, under the control of the aforementioned timing control circuit SC, charges the nth emission driving unit EOA. n The M pixel driving units P on the nth row output a first scanning signal SCAN of low level. n , the n-1th scanning driving unit GOA sends a signal to the nth transmitting driving unit EOA n The M pixel driving units P on the nth row output a second scanning signal SCAN of high level. n-1 , the nth transmitting drive unit EOA n The first switch T1 is turned on and the second switch T2 is turned off so that the third switch T3 is turned on, so that the nth emission driving unit EOA n The emission signal EM at a high level is output to the M pixel driving units P on the n-th row.

[0070] In the third period t3, the nth scanning driving unit GOA sends a signal to the nth emission driving unit EOA. n The first scanning signal SCAN outputted as a high level n , the n-1th scanning driving unit GOA sends a signal to the nth transmitting driving unit EOA n The second scanning signal SCAN outputted as a high level n-1 , so that the nth transmitting drive unit EOA nSpecifically, the third period t3 corresponds to the light-emitting phase of the M pixel driving units P on the nth row. During this period, the nth scanning driving unit GOA, under the control of the aforementioned timing control circuit SC, sends a signal to the nth emission driving unit EOA. n The M pixel driving units P on the nth row output a first scanning signal SCAN of a high level. n , the n-1th scanning driving unit GOA sends a signal to the nth transmitting driving unit EOA n The M pixel driving units P on the nth row output a second scanning signal SCAN of high level. n-1 , the nth transmitting drive unit EOA n The first switch T1 and the second switch T2 are both closed so that the third switch T3 is closed, so that the nth emission driving unit EOA n The emission signal EM of a low level is output to the M pixel driving units P on the n-th row.

[0071] By using the driving method of the display driving circuit 100 in the embodiment of the present invention, the emission driving unit EOA is realized according to the first scanning signal SCAN. n and the second scanning signal SCAN n-1 Outputting the emission signal EM, compared with the solution of outputting the emission signal EM according to the clock signal through the EOA unit in the comparative technology, the present invention reduces the control difficulty of the display driving circuit 100 and also reduces the number of components of the display driving circuit 100.

[0072] Please refer to Figures 4 to 9 The emission driving unit EOA further includes X parallel control switches, the source of each control switch is electrically connected to the first node Q1, the drain of each control switch is electrically connected to the second node Q2, and the X scanning driving units GOA in the N+1 scanning driving units GOA are used to output control scanning signals to the gates of the X control switches one by one, where X is a positive integer; the driving method also passes through a widening period within a driving cycle, and within the widening period, the nth scanning driving unit GOA sends a control scanning signal to the nth emission driving unit EOA n The first scanning signal SCAN outputted as a high level n , the n-1th scanning driving unit GOA sends a signal to the nth transmitting driving unit EOA n The second scanning signal SCAN outputted as a high level n-1 , at least one of the X control scanning signals is at a low level, so that the nth emission driving unit EOA n The output transmission signal EM is at a high level.

[0073] Specifically, the control switch includes a fourth switch T4 and / or a fifth switch T5, and the n-2 th scanning driving unit GOA is used to send a signal to the n th emission driving unit EOA. n Output the third scanning signal SCAN n-2 , and / or, the n+1th scanning driving unit GOA is used to send a signal to the nth transmitting driving unit EOA n Output the fourth scanning signal SCAN n+1 The widening period includes a first widening period t4 and / or a second widening period t5, the first widening period t4 is located before the first period t1, and the second widening period t5 is located between the second period t2 and the third period t3.

[0074] When the control switch includes the fourth switch T4, the driving method sequentially passes through the first widening period t4, the first period t1, the second period t2 and the third period t3 in one driving cycle. In the first widening period t4, the nth scanning driving unit GOA sends a signal to the nth emission driving unit EOA. n The first scanning signal SCAN outputted as a high level n , the n-1th scanning driving unit GOA sends a signal to the nth transmitting driving unit EOA n The second scanning signal SCAN outputted as a high level n-1 , the n-2 scanning driving unit GOA sends a signal to the n-th transmitting driving unit EOA n The third scanning signal SCAN outputted as a low level n-2 , so that the nth transmitting drive unit EOA n The output transmission signal EM is at a high level.

[0075] When the control switch includes the fifth switch T5, the driving method sequentially passes through the first period t1, the second period t2, the second widening period t5 and the third period t3 in one driving cycle. In the second widening period t5, the nth scanning driving unit GOA sends a signal to the nth emission driving unit EOA. n The first scanning signal SCAN outputted as a high level n , the n-1th scanning driving unit GOA sends a signal to the nth transmitting driving unit EOA n The second scanning signal SCAN outputted as a high level n-1 , the n+1th scanning driving unit GOA sends a signal to the nth transmitting driving unit EOA n The fourth scanning signal SCAN outputted as a low level n+1 , so that the nth transmitting drive unit EOA n The output transmission signal EM is at a high level.

[0076] Among them, the first time period t1, the second time period t2 and the third time period t3 correspond to the reset stage, the charging stage and the light-emitting stage of the M pixel driving units P on the n-th row, respectively, the first widening time period t4 corresponds to the first silent stage of the M pixel driving units P on the n-th row, and the second widening time period t5 corresponds to the second silent stage of the M pixel driving units P on the n-th row. When the M pixel driving units P on the n-th row are in the first silent stage, the M pixel driving units P on the n-th row do not reset, charge or emit light, that is, the M pixel driving units P on the n-th row are not turned on, so as to prevent the pixel driving units P from running prematurely and causing display abnormality. When the M pixel driving units P on the n-th row are in the second silent stage, the M pixel driving units P on the n-th row have completed reset and charging but do not emit light, so as to prevent the pixel driving units P from running prematurely and causing display abnormality, and the M pixel driving units P on the n-th row will not emit light until they enter the third time period t3.

[0077] Optional, please refer to Figures 4 to 7 The emission drive unit EOA may set one or both of the fourth switch T4 and the fifth switch T5, without limitation. Figure 8 and Fig. 9 When the emission drive unit EOA is provided with the fourth switch T4 and the fifth switch T5 at the same time, the driving method sequentially passes through the first widening period t4, the first period t1, the second period t2, the second widening period t5 and the third period t3 in one driving cycle. Optionally, the control switch may include the aforementioned fourth switch T4, the aforementioned fifth switch T5 and at least one switch, without limitation.

[0078] In the description of the embodiments of the present application, it should be noted that the orientation or positional relationship of terms such as "center", "up", "down", "left", "right", "vertical", "horizontal", "inside" and "outside" are based on the orientation or positional relationship described in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0079] What is disclosed above is only a preferred embodiment of the present application, and it certainly cannot be used to limit the scope of rights of the present application. Ordinary technicians in this field can understand that all or part of the processes of implementing the above embodiment and equivalent changes made according to the claims of the present application are still within the scope covered by the present application.

Claims

1. A transmitting drive unit, characterized in that: Used in a display driving circuit, the emission driving unit includes a first switch, a second switch and a third switch, the source of the first switch and the source of the second switch are electrically connected at a first node, the drain of the first switch and the drain of the second switch are electrically connected at a second node, the gate of the third switch is electrically connected to the second node, the first node and the source of the third switch are both used to be electrically connected to a first power supply, the second node and the drain of the third switch are both used to be electrically connected to a second power supply, the gate of the first switch is used to input a first scan signal, the gate of the second switch is used to input a second scan signal, and the source of the third switch is used to output an emission signal; Among them, when the first scanning signal and the second scanning signal are both at a high level, the emission signal is at a low level; when one of the first scanning signal and the second scanning signal is at a high level and the other is at a low level, the emission signal is at a high level.

2. The transmitting drive unit according to claim 1, characterized in that: At least one of the first switch, the second switch, and the third switch is a P-type thin film transistor.

3. The transmitting drive unit according to claim 1, characterized in that: The transmitting driving unit further includes a first resistor and a second resistor, the first resistor is electrically connected to the first node and the first power supply, and the second resistor is electrically connected to the source of the third switch and the first power supply; and / or, The transmitting driving unit further includes a third resistor and a fourth resistor, the third resistor is electrically connected to the second node and the second power supply, and the fourth resistor is electrically connected to the drain of the third switch and the second power supply.

4. The transmitting drive unit according to claim 1, characterized in that: The emission driving unit further includes X parallel control switches, a source of each control switch is electrically connected to the first node, a drain of each control switch is electrically connected to the second node, and a gate of each control switch is used to input a control scan signal; when the first scan signal, the second scan signal, and the X control scan signals are all at a high level, the emission signal is at a low level, and when at least one of the first scan signal, the second scan signal, and the X control scan signals is at a low level, the emission signal is at a high level, and X is a positive integer.

5. A display driving circuit, characterized in that: It comprises N+1 cascade-connected scan driving units and N emission driving units as described in any one of claims 1 to 4, the nth scan driving unit is used to output the first scan signal to the nth emission driving unit, and the n-1th scan driving unit is used to output the second scan signal to the nth emission driving unit, N≥1 and N is an integer, 1<n<N and n is an integer.

6. The display driving circuit according to claim 5, characterized in that: The transmitting driving unit further includes X control switches connected in parallel, a source of each control switch is electrically connected to the first node, and a drain of each control switch is electrically connected to the second node; X of the scan driving units among the N+1 scan driving units are used to output control scan signals to the gates of the X control switches in a one-to-one correspondence, where X is a positive integer.

7. The display driving circuit according to claim 5, characterized in that: The display driving circuit also includes N*M pixel driving units arranged in an array, the nth scanning driving unit is electrically connected to the M pixel driving units on the nth row, the nth emission driving unit is electrically connected to the M pixel driving units on the nth row, M≥1 and M is an integer.

8. A display device, characterized in that: Comprising the display driving circuit as described in any one of claims 5-7.

9. A driving method, characterized in that: Applied to the display driving circuit according to any one of claims 5 to 7, the driving method sequentially passes through a first time period, a second time period and a third time period in a driving cycle, and the driving method comprises: In the first period, the nth scan driving unit outputs a first scan signal of a high level to the nth emission driving unit, and the n-1th scan driving unit outputs a second scan signal of a low level to the nth emission driving unit, so that the emission signal output by the nth emission driving unit is a high level; In the second period, the nth scan driving unit outputs the first scan signal of a low level to the nth emission driving unit, and the n-1th scan driving unit outputs the second scan signal of a high level to the nth emission driving unit, so that the emission signal output by the nth emission driving unit is a high level; In the third time period, the nth scan driving unit outputs the first scan signal of a high level to the nth emission driving unit, and the n-1th scan driving unit outputs the second scan signal of a high level to the nth emission driving unit, so that the emission signal output by the nth emission driving unit is a low level.

10. The driving method according to claim 9, characterized in that: The emission driving unit further includes X control switches connected in parallel, a source of each control switch is electrically connected to the first node, a drain of each control switch is electrically connected to the second node, and X of the N+1 scan driving units are used to output control scan signals to the gates of the X control switches in a one-to-one correspondence, where X is a positive integer; The driving method further passes through a widening period within one driving cycle. During the widening period, the nth scanning driving unit outputs the first scanning signal of a high level to the nth emission driving unit, the n-1th scanning driving unit outputs the second scanning signal of a high level to the nth emission driving unit, and at least one of the X control scanning signals is at a low level, so that the emission signal output by the nth emission driving unit is at a high level.

Images