Light emission control circuit, driving method of light emission control circuit, and display device

Abstract

Embodiments of the present invention disclose a light-emitting control circuit, a driving method for the light-emitting control circuit, and a display device. The light-emitting control circuit includes: a first input module, a second input module, a first output module, a second output module, a voltage clamping module, and a voltage maintaining module. In the present solution, during the period when the first input module responds to the first control signal, the first output module responds to the potential of the first node, and the second output module cannot respond to the potential of the second node. The first output module can stably control the potential of the output end of the light-emitting control circuit. During the period when the second input module responds to the second control signal, the second output module responds to the potential of the second node, and the first output module cannot respond to the potential of the first node. The second output module can stably control the potential of the output end of the light-emitting control circuit. In addition, the voltage maintaining module can perform bootstrap coupling according to the third control signal to stably maintain the potential of the second node.

Description

Technical Field

[0001] The present invention relates to the field of display technologies, and in particular, to a light emission control circuit, a driving method of the light emission control circuit, and a display device. Background Art

[0002] With the continuous development of display technologies, consumers' requirements for the display of display panels are also getting higher and higher. Among them, a light emission control circuit is provided in the display panel to provide a light emission control signal for pixel units, control the light emitting devices in the pixel units to emit light, and realize the display of the display panel. In the prior art, there is a problem that the reliability of the light emission control circuit is relatively poor, resulting in relatively poor stability of the light emission control signal output by the light emission control circuit, and further causing problems in the display of the display panel. Summary of the Invention

[0003] Embodiments of the present invention provide a light emission control circuit, a driving method of the light emission control circuit, and a display device to improve the stability of the output of the light emission control circuit.

[0004] To achieve the above technical objectives, the embodiments of the present invention provide the following technical solutions:

[0005] A light emission control circuit, characterized by comprising:

[0006] A first input module, a second input module, a first output module, a second output module, a voltage clamping module, and a voltage maintaining module;

[0007] The output end of the first input module is electrically connected to the control end of the first output module; define the control end of the first output module as a first node, and the first input module controls the potential of the first node in response to a first control signal; the first output module controls the potential of the output end of the light emission control circuit in response to the potential of the first node;

[0008] The output end of the second input module is electrically connected to the control end of the second output module; define the control end of the second output module as a second node, and the second input module controls the potential of the second node in response to a second control signal; the second output module controls the potential of the output end of the light emission control circuit in response to the potential of the second node;

[0009] A voltage clamping module, which is connected between the first node and the second node and is used to control the potentials of the first node and the second node to be opposite;

[0010] The voltage maintaining module is electrically connected to the second node, and the voltage maintaining module is also connected to a third control signal; the voltage maintaining module performs bootstrap coupling according to the third control signal to maintain the potential of the second node.

[0011] Optionally, in the nth-level light-emitting control circuit, the first control signal is the output signal of the nth-level scanning circuit, and the second control signal is the output signal of the (n + k)th-level scanning circuit; where n is a positive integer and k is a positive integer;

[0012] Preferably, k = 2.

[0013] Optionally, the third control signal is a first clock signal; the waveform of the first clock signal has pulses that overlap with the valid level in the waveform of the second control signal;

[0014] Alternatively, the third control signal is a second clock signal; the waveform of the second clock signal has no pulses that overlap with the valid level in the waveform of the second control signal;

[0015] Alternatively, in the nth-level light-emitting control circuit, the third control signal is the output signal of the (n + p)th-level light-emitting control circuit; where both n and p are positive integers;

[0016] Preferably, p = 1 or p = 2.

[0017] Optionally, the voltage maintaining module includes: a coupling unit, a reset unit, and a bootstrap transmission unit;

[0018] The first end of the coupling unit is electrically connected to the second node;

[0019] The second end of the coupling unit is electrically connected to the reset unit, and the reset unit is used to initialize the second end of the coupling unit; and, the second end of the coupling unit is electrically connected to the bootstrap transmission unit, and the bootstrap transmission unit is used to transmit the third control signal to the second end of the coupling unit.

[0020] Optionally, the coupling unit includes a first capacitor, and the first plate of the first capacitor is electrically connected to the second node;

[0021] The reset unit includes a first transistor, the gate of the first transistor is electrically connected to the first node, the first pole of the first transistor is connected to a reset signal, and the second pole of the first transistor is electrically connected to the second plate of the first capacitor;

[0022] The bootstrap transfer unit includes a second transistor, the gate of the second transistor is electrically connected to the second node, the first pole of the second node accesses the third control signal, and the second pole of the second node is electrically connected to the second plate of the first capacitor;

[0023] Preferably, both the first transistor and the second transistor are N-type transistors;

[0024] Preferably, the light emission control circuit further includes a second capacitor, the first plate of the second capacitor is electrically connected to the first node, and the second plate of the second capacitor accesses a reference voltage signal.

[0025] Optionally, the light emission control circuit further includes:

[0026] A first reset module, the first reset module is electrically connected to the first node, and the first reset module resets the first node in response to the second control signal;

[0027] Preferably, the first reset module includes a third transistor, the gate of the third transistor accesses the second control signal, the first pole of the third transistor accesses a reset signal, and the second pole of the third transistor is electrically connected to the first node;

[0028] Preferably, the third transistor is an N-type transistor.

[0029] Optionally, the light emission control circuit further includes:

[0030] A second reset module, the second reset module is electrically connected to the second node, and the second reset module resets the second node in response to the first control signal;

[0031] Preferably, the second reset module includes a fourth transistor, the gate of the fourth transistor accesses the first control signal, the first pole of the fourth transistor accesses a reset signal, and the second pole of the fourth transistor is electrically connected to the second node;

[0032] Preferably, the fourth transistor is an N-type transistor.

[0033] Optionally, the first input module includes: a fifth transistor, the gate of the fifth transistor accesses the first control signal, the first pole of the fifth transistor accesses a first level signal, and the second pole of the fifth transistor is electrically connected to the first node;

[0034] And / or, the second input module includes: a sixth transistor, the gate of the sixth transistor accesses the second control signal, the first pole of the sixth transistor accesses the first level signal, and the second pole of the sixth transistor is electrically connected to the second node;

[0035] And / or, the voltage clamping module includes: a seventh transistor and an eighth transistor; a gate of the seventh transistor is electrically connected to the second node, a first pole of the seventh transistor accesses a second-level signal, and a second pole of the seventh transistor is electrically connected to the first node;

[0036] A gate of the eighth transistor is electrically connected to the first node, a first pole of the eighth transistor accesses the second-level signal, and a second pole of the eighth transistor is electrically connected to the second node;

[0037] And / or, the first output module includes: a ninth transistor, a gate of the ninth transistor is electrically connected to the first node, a first pole of the ninth transistor accesses the second-level signal, and a second pole of the ninth transistor is electrically connected to an output end of the light-emitting control circuit;

[0038] And / or, the second output module includes: a tenth transistor, a gate of the tenth transistor is electrically connected to the second node, a first pole of the tenth transistor accesses a third-level signal, and a second pole of the tenth transistor is electrically connected to the output end of the light-emitting control circuit;

[0039] Preferably, the fifth transistor, the sixth transistor, the seventh transistor, the eighth transistor, the ninth transistor and the tenth transistor are all N-type transistors; the first-level signal and the third-level signal are both high levels, and the second-level signal is a low level;

[0040] Preferably, a voltage of the first-level signal is greater than or equal to a voltage of the third-level signal.

[0041] Correspondingly, an embodiment of the present invention further provides a driving method for a light-emitting control circuit. The driving method is applicable to the light-emitting control circuit described in any embodiment of the present invention. The driving method for the light-emitting control circuit includes:

[0042] In a first stage, the first control signal controls the first input module to conduct, and a potential of the first node is switched; the first node controls the first output module to conduct, and a potential of an output end of the light-emitting control circuit is switched; the voltage clamping module controls the potential of the second node to be clamped, and the second node controls the second output module to be disconnected;

[0043] In a second stage, the second control signal controls the second input module to conduct, and a potential of the second node is switched; the second node controls the second output module to conduct, and a potential of the output end of the light-emitting control circuit is switched; the voltage clamping module controls the potential of the first node to be clamped, and the first node controls the first output module to be disconnected;

[0044] Wherein, in the second stage, the voltage maintaining module performs bootstrap coupling according to the third control signal to maintain the potential of the second node.

[0045] Correspondingly, an embodiment of the present invention further provides a display device, which includes: a plurality of the light-emitting control circuits provided in any embodiment of the present invention connected in cascade.

[0046] In the light-emitting control circuit provided by the embodiment of the present invention, the output end of the first input module is electrically connected to the control end (the first node) of the first output module, the output end of the second input module is electrically connected to the control end (the second node) of the second output module, and the voltage clamping module is connected between the first node and the second node. During the period when the first input module responds to the first control signal, the potential of the first node can be stably controlled. At the same time, the voltage clamping module controls the potential of the second node to jump to a potential opposite to that of the first node. Therefore, the first output module responds to the potential of the first node, and the second output module cannot respond to the potential of the second node, so that the first output module can stably control the potential of the output end of the light-emitting control circuit, thereby improving the stability of the output of the light-emitting control circuit. During the period when the second input module responds to the second control signal, the potential of the second node can be stably controlled. At the same time, the voltage clamping module controls the potential of the first node to jump to a potential opposite to that of the second node. Therefore, the second output module responds to the potential of the second node, and the first output module cannot respond to the potential of the first node, so that the second output module can stably control the potential of the output end of the light-emitting control circuit, thereby improving the stability of the output of the light-emitting control circuit. In addition, the second node of the light-emitting control circuit needs to be maintained at a certain fixed potential for a long time. The voltage maintaining module is electrically connected to the second node, and the voltage maintaining module can perform bootstrap coupling according to the third control signal to supplement electric energy to the second node to stably maintain the potential of the second node. Description of the Drawings

[0047] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0048] Figure 1 It is a schematic structural diagram of a light-emitting control circuit provided by an embodiment of the present invention;

[0049] Figure 2 It is a schematic structural diagram of the connection between a light-emitting control circuit and a scanning circuit provided by an embodiment of the present invention;

[0050] Figure 3 Schematic diagram of the circuit structure of the nth - level pixel driving circuit provided by an embodiment of the present invention;

[0051] Figure 4 Schematic diagram of the structure of another light - emitting control circuit provided by an embodiment of the present invention;

[0052] Figure 5 Schematic diagram of the driving timing of a light - emitting control circuit provided by an embodiment of the present invention;

[0053] Figure 6 Schematic diagram of the driving timing of another light - emitting control circuit provided by an embodiment of the present invention;

[0054] Figure 7 Schematic diagram of the driving timing of yet another light - emitting control circuit provided by an embodiment of the present invention;

[0055] Figure 8 Schematic diagram of the driving timing of yet another light - emitting control circuit provided by an embodiment of the present invention;

[0056] Figure 9 Schematic diagram of the driving timing of yet another light - emitting control circuit provided by an embodiment of the present invention;

[0057] Figure 10 Schematic diagram of the structure of yet another light - emitting control circuit provided by an embodiment of the present invention;

[0058] Figure 11 Schematic diagram of the structure of yet another light - emitting control circuit provided by an embodiment of the present invention;

[0059] Figure 12 Schematic diagram of the structure of yet another light - emitting control circuit provided by an embodiment of the present invention;

[0060] Figure 13 Schematic diagram of the structure of yet another light - emitting control circuit provided by an embodiment of the present invention;

[0061] Figure 14 Schematic diagram of the structure of yet another light - emitting control circuit provided by an embodiment of the present invention;

[0062] Figure 15 Schematic diagram of the structure of yet another light - emitting control circuit provided by an embodiment of the present invention;

[0063] Figure 16 Schematic diagram of the structure of yet another light - emitting control circuit provided by an embodiment of the present invention;

[0064] Figure 17 Schematic diagram of the structure of yet another light - emitting control circuit provided by an embodiment of the present invention;

[0065] Figure 18Schematic diagram of another light emission control circuit provided by an embodiment of the present invention;

[0066] Figure 19 Flow chart of a driving method for a light emission control circuit provided by an embodiment of the present invention;

[0067] Figure 20 Schematic diagram of a display device provided by an embodiment of the present invention;

[0068] Figure 21 Schematic diagram of the driving timing of another light emission control circuit provided by an embodiment of the present invention;

[0069] Figure 22 Schematic diagram of the driving timing of another light emission control circuit provided by an embodiment of the present invention. Detailed implementation manners

[0070] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0071] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above drawings are used to distinguish similar objects, and do not necessarily need to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the term "comprising" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0072] An embodiment of the present invention provides a light emission control circuit. Figure 1 Schematic diagram of a light emission control circuit provided by an embodiment of the present invention. Refer to Figure 1 , the light emission control circuit includes: a first input module 110, a second input module 120, a first output module 130, a second output module 140, a voltage clamping module 150, and a voltage maintaining module 160.

[0073] The output terminal of the first input module 110 is electrically connected to the control terminal of the first output module 130; the control terminal of the first output module 130 is defined as the first node N1, and the first input module 110 controls the potential of the first node N1 in response to the first control signal X; the first output module 130 controls the potential of the output terminal OUT of the light-emitting control circuit in response to the potential of the first node N1. The output terminal of the second input module 120 is electrically connected to the control terminal of the second output module 140; the control terminal of the second output module 140 is defined as the second node N2, and the second input module 120 controls the potential of the second node N2 in response to the second control signal Y; the second output module 140 controls the potential of the output terminal of the light-emitting control circuit in response to the potential of the second node N2. A voltage clamping module 150 is connected between the first node N1 and the second node N2 and is used to control the potentials of the first node N1 and the second node N2 to be opposite to each other. A voltage maintaining module 160 is electrically connected to the second node N2, and the voltage maintaining module 160 is further connected to a third control signal S; the voltage maintaining module 160 performs bootstrap coupling according to the third control signal S to maintain the potential of the second node N2.

[0074] Specifically, the light-emitting control circuit refers to a shift register circuit that outputs a light-emitting control signal. The signal output from the output terminal of the light-emitting control circuit is the light-emitting control signal (EM signal) in the pixel circuit, that is, the potential of the output terminal of the light-emitting control circuit can control the on and off of the transistors in the pixel circuit to control the working state of the light-emitting device.

[0075] Among them, the control terminal of the first output module 130 is defined as the first node N1, that is, the interconnected node of the control terminals of the first input module 110, the voltage clamping module 150, and the first output module 130 is the first node N1. The control terminal of the second output module 140 is defined as the second node N2, that is, the interconnected node of the control terminals of the second input module 120, the voltage clamping module 150, the voltage maintaining module 160, and the second output module 140 is the second node N2.

[0076] During the period when the first input module 110 controls the potential of the control terminal of the first output module 130 (the potential of the first node N1) according to the first control signal X, the first output module 130 can control the potential of the output terminal of the light-emitting control circuit according to the potential of the first node N1. At the same time, the voltage clamping module 150 can control the potential of the second node N2 to jump to a potential opposite to that of the first node N1 according to the potential of the first node N1, thereby ensuring that the second output module 140 is turned off in response to the potential of the second node N2, so that the second output module 140 cannot control the potential of the output terminal of the light-emitting control circuit. Thus, it can be ensured that during the period when the first input module 110 controls the potential of the first node N1 according to the first control signal X, the first output module 130 can stably control the potential of the output terminal of the light-emitting control circuit, thereby improving the stability of the output of the light-emitting control circuit.

[0077] During the period when the second input module 120 controls the potential of the control terminal of the second output module 140 (the potential of the second node N2) according to the second control signal Y, the second output module 140 can control the potential of the output terminal of the light-emitting control circuit according to the potential of the second node N2. At the same time, the voltage clamping module 150 can control the potential of the first node N1 to jump to a potential opposite to that of the second node N2 according to the potential of the second node N2, thereby ensuring that the first output module 130 is turned off in response to the potential of the first node N1, so that the first output module 130 cannot control the potential of the output terminal of the light-emitting control circuit. Thus, it can be ensured that during the period when the second input module 120 controls the potential of the second node N2 according to the second control signal Y, the second output module 140 can stably control the potential of the output terminal of the light-emitting control circuit, thereby improving the stability of the output of the light-emitting control circuit.

[0078] It should be added that: the second node N2 of the light-emitting control circuit needs to be maintained at a certain fixed potential for a long time. In order to ensure the stability of the potential of the second node N2, the voltage maintaining module 160 needs to perform bootstrap coupling according to the third control signal S to supply electrical energy to the second node N2, so that the second node N2 can be maintained at a certain fixed potential for a long time. Among them, the third control signal S is a signal with a changing potential. During the process of the change of the potential of the third control signal S, the voltage maintaining module 160 can perform bootstrap coupling according to the third control signal S to stably maintain the potential of the second node N2.

[0079] Based on the above embodiments, optionally, continue to refer to Figure 1 , in the nth-level light-emitting control circuit, the first control signal X is the output signal of the nth-level scanning circuit, and the second control signal Y is the output signal of the (n + k)th-level scanning circuit; where n is a positive integer and k is a positive integer.

[0080] Specifically, the first input module 110 of the nth-level light-emitting control circuit is connected to the output end of the nth-level scanning circuit, and the second input module 120 is connected to the output end of the (n + k)th-level scanning circuit. Thus, the output signal (the first control signal X) of the nth-level scanning circuit can control the first output module 130 to control the potential of the output end of the light-emitting control circuit, and the output signal (the second control signal Y) of the (n + k)th-level scanning circuit can control the second output module 140 to control the potential of the output end of the light-emitting control circuit.

[0081] It should be noted that: the second control signal Y is output at least one clock cycle later than the first control signal X, that is, K is a positive integer. Accordingly, it can be ensured that during the period when the scanning circuit provides the first control signal X to the light-emitting control circuit, the time for the first output module 130 to control the potential of the output end of the light-emitting control circuit is at least one clock cycle.

[0082] In the embodiment of the present invention, by using the output signal of the nth-level scanning circuit as the first control signal X of the nth-level light-emitting control circuit and using the output signal of the (n + k)th-level scanning circuit as the second control signal Y of the nth-level light-emitting control circuit, compared with the prior art, the clock signal necessary for the conventional circuit is removed, the circuit layout of the light-emitting control circuit is simplified, and it is convenient to adjust the duration for the first output module 130 to control the potential of the output end of the light-emitting control circuit.

[0083] Based on the above embodiment, optionally, Figure 2 FIG. is a schematic structural diagram of the connection between a light-emitting control circuit and a scanning circuit provided by an embodiment of the present invention. As Figure 2 shown, k = 2.

[0084] Among them, when the duration for the first output module 130 in the light-emitting control circuit to control the potential of the output end OUT of the light-emitting control circuit is one clock cycle, the control effect of the light-emitting control signal generated by the light-emitting control circuit on the light-emitting device of the pixel circuit is the best, so K = 2 can be set.

[0085] Specifically, Figure 2 exemplarily shows the connection manners of the nth-level, (n + 1)th-level, and (n + 2)th-level light-emitting control circuits and the scanning circuit from top to bottom. The connection manner between the light-emitting control circuit and the scanning circuit is as follows: the first input module 110 of the nth-level light-emitting control circuit is electrically connected to the output end of the nth-level scanning circuit, and the output signal G n of the nth-level scanning circuit is used as the first control signal; the second input module 120 of the nth-level light-emitting control circuit is electrically connected to the output end of the (n + 2)th-level scanning circuit, and the output signal G n+2As the second control signal. In this way, the n-th stage light-emitting control circuit can output the light-emitting control signal EM(n). The first input module 110 of the (n + 1)-th stage light-emitting control circuit is electrically connected to the output terminal of the (n + 1)-th stage scanning circuit, and outputs the signal G of the (n + 1)-th stage scanning circuit n+1 As the first control signal; the second input module 120 of the (n + 1)-th stage light-emitting control circuit is electrically connected to the output terminal of the (n + 3)-th stage scanning circuit, and outputs the signal G of the (n + 3)-th stage scanning circuit n+3 As the second control signal. In this way, the n-th stage light-emitting control circuit can output the light-emitting control signal EM(n + 1). The first input module 110 of the (n + 2)-th stage light-emitting control circuit is electrically connected to the output terminal of the (n + 2)-th stage scanning circuit, and outputs the signal G of the (n + 2)-th stage scanning circuit n+2 As the first control signal; the second input module 120 of the (n + 2)-th stage light-emitting control circuit is electrically connected to the output terminal of the (n + 4)-th stage scanning circuit, and outputs the signal G of the (n + 4)-th stage scanning circuit n+4 As the second control signal. In this way, the (n + 2)-th stage light-emitting control circuit can output the light-emitting control signal EM(n + 2).

[0086] Optionally, Figure 3 is a schematic circuit diagram of an n-th stage pixel driving circuit provided by an embodiment of the present invention. Refer to Figure 3 , the multiple electronic components include a driving transistor M2, a data writing transistor M1, a storage capacitor C, a threshold compensation transistor M7, a first light-emitting control transistor M3, a second light-emitting control transistor M6, a first initialization transistor M5, and a second initialization transistor M6. The driving transistor M2 is used to generate a driving current. The data writing transistor M1 is used to write the data voltage Vdata into the control terminal of the driving transistor T2 under the control of the second scanning signal S2. The threshold compensation transistor M7 is used to capture the threshold voltage of the driving transistor M2 to the control terminal of the driving transistor M2. The first initialization transistor M5 is used to write the initialization signal Vref into the control terminal of the driving transistor T2 under the control of the first scanning signal S1 to initialize the driving transistor M2. The second initialization transistor M4 is used to initialize the light-emitting device D. The first light-emitting control transistor M3 and the second light-emitting control transistor M4 are used to provide a current path for the light-emitting device D under the control of the light-emitting control signal EM(n) generated by the n-th stage light-emitting control circuit.

[0087] Specifically, the pixel driving circuit in this embodiment includes seven transistors and one capacitor, which is also commonly referred to as a "7T1C" pixel driving circuit in the art. Its specific working process is well known to those skilled in the art and will not be elaborated here.

[0088] Combined with Figure 2 and Figure 3It can be seen that the light control signal EM(n) generated by the n-th level light control circuit 100 is output to the control ends of the first light control transistor M3 and the second light control transistor M4 of the n-th level pixel circuit, thereby controlling the light emitting device D of the n-th level pixel circuit to emit light.

[0089] Based on the above embodiment, optionally, Figure 4 This is a schematic diagram of another light emitting control circuit provided by an embodiment of the present invention. Figure 4 , the connection relationship between each module is:

[0090] The output end of the first input module 110 is connected to the control end of the first output module 130, the control end of the first input module 110 is connected to the first control signal X, the input end of the first input module 110 is connected to the high level signal VGH, and the input end of the first output module 130 is connected to the low level signal VGL. The output end of the second input module 120 is connected to the control end of the second output module 140, the control end of the second input module 120 is connected to the second control signal Y, the input end of the second input module 120 is connected to the high level signal VGH, and the input end of the second output module 140 is connected to the high level signal VGH. The output end of the first output module 130 is connected to the output end of the second output module 140 and serves as the output end of the light emitting control circuit. The control end of the first output module 130 is defined as the first node N1, and the control end of the second output module 140 is defined as the second node N2. The voltage clamping module 150 is connected between the first node N1 and the second node N2, the voltage maintaining module 160 is electrically connected to the second node N2, and the input end of the voltage maintaining module 160 is connected to the third control signal S.

[0091] In the following embodiment, the first input module 110, the second input module 120, the first output module 130 and the second output module 140 are set to be turned on in response to a high potential, and the first input module 110, the second input module 120, the first output module 130 and the second output module 140 are disconnected in response to a low potential, and the working process of the light emitting control circuit is described. In other embodiments, the first input module 110, the second input module 120, the first output module 130 and the second output module 140 can be set to be turned on in response to a low potential, and the first input module 110, the second input module 120, the first output module 130 and the second output module 140 can be disconnected in response to a high potential.

[0092] Figure 5 A driving timing diagram of a light emitting control circuit provided by an embodiment of the present invention. Figure 4 and Figure 5 , exemplarily, the first control signal X is G n , the second control signal Y is G n+2, the driving process of the light emitting control circuit is as follows:

[0093] In the first stage T1, the first control signal jumps from a low level to a high level, and the first input module 110 is turned on in response to the high potential of the first control signal, and controls the first node N1 to switch to a high level. The first output module 130 is turned on in response to the high potential of the first node N1, and outputs the low level signal VGL to the output end of the light emitting control circuit. At the same time, the voltage clamping module 150 controls the potential of the second node N2 to become a low level, and the second output module 140 is disconnected in response to the low potential of the second node N2.

[0094] In the second stage T2, the second control signal jumps from a low level to a high level, and the second input module 120 is turned on in response to the high potential of the second control signal, and controls the second node N2 to switch to a high level. The second output module 140 is turned on in response to the high potential of the second node N2, and outputs the high level signal VGH to the output end of the light emitting control circuit. At the same time, the voltage clamping module 150 controls the potential of the first node N1 to become a low level, and the first output module 130 is disconnected in response to the low potential of the first node N1.

[0095] In the second stage T2 , the voltage maintaining module 160 performs bootstrap coupling according to the third control signal S to maintain the potential of the second node N2 .

[0096] Based on the above embodiment, optionally, Figure 6 A driving timing diagram of another light emitting control circuit provided by an embodiment of the present invention. Figure 4 and Figure 6 , exemplarily, the first control signal X is G n , the second control signal Y is G n+2 , the third control signal S is the first clock signal ECK1; there are overlapping pulses in the effective levels of the waveform of the first clock signal ECK1 and the waveform of the second control signal. Figure 6 In the waveform of the second control signal, the effective level is a high level, and the high level of the first clock signal ECK1 overlaps with the high level of the second control signal. The driving process of the light emitting control circuit is as follows:

[0097] Second stage: The second control signal jumps from low level to high level. The second input module 120 conducts in response to the high potential of the second control signal, controlling the second node N2 to switch to high level. The second output module 140 conducts in response to the high potential of the second node N2, and outputs the high-level signal VGH to the output terminal of the light-emitting control circuit. Since there is a leakage problem in the second node N2, it is difficult to maintain the voltage of the second node N2 at a high level. At this time, the first clock signal ECK1 that overlaps with the high level in the waveform of the second control signal can couple the high-level pulse that overlaps with the high level in the waveform of the second control signal to the second node N2 through the voltage maintenance module 160. Since the second control signal and the first clock signal ECK1 both jump from low level to high level at the same time, the voltage maintenance module 160 can quickly couple the high-level pulse to the second node N2, so that the decreased potential of the second node N2 can be quickly replenished, and then the second output module 140 can quickly output the high-level signal VGH to the output terminal of the light-emitting control circuit.

[0098] Based on the above embodiments, optionally, Figure 7 is a schematic diagram of the driving timing of another light-emitting control circuit provided by the embodiment of the present invention. Combining Figure 4 and Figure 7 , exemplarily, the first control signal X is G n , the second control signal Y is G n+2 , and the third control signal S is the second clock signal ECK2; the waveform of the second clock signal ECK2 is a pulse that does not overlap with the effective level in the waveform of the second control signal. Figure 7 In, the effective level in the waveform of the second control signal is high level, and the high level of the second clock signal ECK2 does not overlap with the high level of the second control signal. The driving process of this light-emitting control circuit is as follows:

[0099] Second stage: The second control signal jumps from low level to high level. The second input module 120 conducts in response to the high potential of the second control signal, controlling the second node N2 to switch to high level. The second output module 140 conducts in response to the high potential of the second node N2, and outputs the high-level signal VGH to the output end of the light-emitting control circuit. Due to the problem of leakage of the second node N2, it is difficult for the voltage of the second node N2 to always maintain at high level. At this time, the second clock signal ECK2 that does not overlap with the high level in the waveform of the second control signal is used to maintain the high potential of the second node N2. When the second clock signal ECK2 changes from low level to high level, the high level of the second clock signal ECK2 can be coupled to the second node N2 through the voltage maintenance module 160, so that the potential of the second node N2 can supplement the reduced electric energy, and thus the high level can be maintained for a long time. Since the second clock signal ECK2 is at low level at the moment when the second output module 140 starts to output the high-level signal VGH to the output end of the light-emitting control circuit, the voltage maintenance module 160 cannot supplement the potential of the second node N2 at this time. Therefore, the speed at which the second output module 140 outputs the high-level signal VGH to the output end of the light-emitting control circuit is slightly slower.

[0100] Based on the above embodiments, optionally, in the nth-level light-emitting control circuit, the third control signal S is the output signal of the (n + p)th-level light-emitting control circuit; where n and p are both positive integers; preferably, p = 1 or p = 2.

[0101] Figure 8 This is a driving timing diagram of another light-emitting control circuit provided by an embodiment of the present invention. As shown in Figure 8 the figure, exemplarily, the first control signal X is G n , and the second control signal Y is G n+2 . In the nth-level light-emitting control circuit, the third control signal S is the output signal EM(n + 1) of the (n + 1)th-level light-emitting control circuit.

[0102] Figure 9 This is a driving timing diagram of another light-emitting control circuit provided by an embodiment of the present invention. As shown in Figure 9 the figure, exemplarily, the first control signal X is G n , and the second control signal Y is G n+2 . In the nth-level light-emitting control circuit, the third control signal S is the output signal EM(n + 2) of the (n + 2)th-level light-emitting control circuit.

[0103] Combined with Figure 4 , Figure 8 and Figure 9, Second stage: The second control signal jumps from low level to high level. The second input module 120 conducts in response to the high potential of the second control signal, controlling the second node N2 to switch to high level. The second output module 140 conducts in response to the high potential of the second node N2 and outputs the high-level signal VGH to the output terminal of the light-emitting control circuit. Due to the problem of leakage of the second node N2, it is difficult to maintain the voltage of the second node N2 at a high level. At this time, the output signal EM(n + 1) of the (n + 1)-th stage light-emitting control circuit or the output signal EM(n + 2) of the (n + 2)-th stage light-emitting control circuit is used to maintain the high potential of the second node N2. When the output signal of the (n + 1)-th stage or (n + 2)-th stage light-emitting control circuit changes from low level to high level, the high level of the output signal EM(n + 1) of the (n + 1)-th stage light-emitting control circuit or the output signal EM(n + 2) of the (n + 2)-th stage light-emitting control circuit can be coupled to the second node N2 through the voltage maintenance module 160, so that the potential of the second node N2 can supplement the dissipated electrical energy and thus can maintain a high level for a long time. Since at the moment when the second output module 140 starts to output the high-level signal VGH to the output terminal of the light-emitting control circuit, the output signal EM(n + 1) of the (n + 1)-th stage light-emitting control circuit or the output signal EM(n + 2) of the (n + 2)-th stage light-emitting control circuit is at low level, the voltage maintenance module 160 cannot supplement the potential of the second node N2 at this time. Therefore, the second output module 140 outputs the high-level signal VGH to the output terminal of the light-emitting control circuit at a slightly slower speed.

[0104] In summary, by comparison Figures 6 - 9 , from the analysis of the effect of the output signal of the light-emitting control circuit: Figure 6 In [reference], the second output module 140 outputs the high-level signal VGH to the output terminal of the light-emitting control circuit at the fastest speed, indicating that the effect of using the first clock signal ECK1 whose waveform overlaps with that of the second control signal to maintain the potential of the second node N2 is the best. Starting from the circuit design of the light-emitting control circuit, Figure 8 and Figure 9 The corresponding light-emitting control circuits compared with the prior art remove the clock signal that is essential for the conventional circuit, simplifying the circuit layout of the light-emitting control circuit.

[0105] Based on the above embodiments, optionally, Figure 10 FIG. [figure number] is a schematic structural diagram of another light-emitting control circuit provided by an embodiment of the present invention. Refer to Figure 10, the voltage maintaining module 160 includes: a coupling unit 161, a reset unit 162, and a bootstrap transmission unit 163; a first end of the coupling unit 161 is electrically connected to the second node N2; a second end of the coupling unit 161 is electrically connected to the reset unit 162, and the reset unit 162 is used to initialize the second end of the coupling unit 161; and, the second end of the coupling unit 161 is electrically connected to the bootstrap transmission unit 163, and the bootstrap transmission unit 163 is used to transmit the third control signal S to the second end of the coupling unit 161. With such an arrangement in the embodiments of the present invention, it can be ensured that the circuit has the working performance at a low frequency of 1 Hz, and the stability of the output signal of the light-emitting control circuit is guaranteed.

[0106] Specifically, the input end of the bootstrap transmission unit 163 accesses the third control signal S. The coupling unit 161 can couple the voltage at its second end to its first end. Thus, both the reset unit 162 and the bootstrap transmission unit 163 are connected to the second end of the coupling unit 161, and by changing the potential of the second end of the coupling unit 161, the potential of the first end of the coupling unit 161 is controlled. For example, the reset unit 162 can initialize the second end of the coupling unit 161, so that the coupling unit 161 couples the initialization potential to the second node N2. The bootstrap transmission unit 163 can transmit the third control signal S to the second end of the coupling unit 161, so that the coupling unit 161 couples the third control signal S to the second node N2, thereby charging the second node N2 to maintain the potential stability of the second node N2.

[0107] Based on the above embodiments, optionally, Figure 11 is a schematic structural diagram of another light-emitting control circuit provided by the embodiments of the present invention. Refer to Figure 11 , the coupling unit 161 includes a first capacitor C1, and a first plate of the first capacitor C1 is electrically connected to the second node N2; the reset unit 162 includes a first transistor T1, a gate of the first transistor T1 is electrically connected to the first node N1, a first pole of the first transistor T1 accesses the reset signal Rest, and a second pole of the first transistor T1 is electrically connected to a second plate of the first capacitor C1; the bootstrap transmission unit 163 includes a second transistor T2, a gate of the second transistor T2 is electrically connected to the second node N2, a first pole of the second node N2 accesses the third control signal S, and a second pole of the second node N2 is electrically connected to the second plate of the first capacitor C1.

[0108] Exemplarily, both the first transistor T1 and the second transistor T2 are N-type transistors, and the conduction levels of the first transistor T1 and the second transistor T2 are high levels. The reset signal Rest is a low level. Refer to Figure 5 and Figure 11, Exemplarily, in the first stage: The first node N1 is at a high level. The voltage clamping module 150 clamps the potential of the second node N2 to a low level. In response to the low potential of the second node N2, the second transistor T2 is turned off. At the same time, in response to the high potential of the first node N1, the first transistor T1 is turned on. The first transistor T1 being turned on outputs the low level of the reset signal Rest to the second plate of the first capacitor C1. Due to the coupling effect of the first capacitor C1, the second node N2 is further maintained at a low level.

[0109] In the second stage: The second node N2 is at a high level. The voltage clamping module 150 clamps the potential of the first node N1 to a low level. In response to the low potential of the first node N1, the first transistor T1 is turned off. At the same time, in response to the high potential of the second node N2, the second transistor T2 is turned on. The second transistor T2 being turned on outputs the third control signal S to the second plate of the first capacitor C1. When the third control signal S changes from a low level to a high level, due to the coupling effect of the first capacitor C1, the electrical energy lost due to leakage current can be replenished to the second node N2, maintaining the second node N2 at a high level.

[0110] Based on the above embodiments, optionally, Figure 12 is a schematic structural diagram of another light emission control circuit provided by an embodiment of the present invention. Refer to Figure 12 , The light emission control circuit further includes a second capacitor C2. The first plate of the second capacitor C2 is electrically connected to the first node N1, and the second plate of the second capacitor C2 is connected to the reference voltage signal V0. By setting it like this in the embodiment of the present invention, the circuit structure can be made more stable and easier to implement.

[0111] Based on the above embodiments, optionally, Figure 13 is a schematic structural diagram of another light emission control circuit provided by an embodiment of the present invention. Refer to Figure 13 , The light emission control circuit further includes: a first reset module 170. The first reset module 170 is electrically connected to the first node N1, and the first reset module 170 resets the first node N1 in response to the second control signal Y.

[0112] Among them, in the second stage: The second control signal Y controls the first reset module 170 to be turned on, enabling the potential of the first node N1 to quickly switch. The first node N1 controls the first output module 130 to be turned off. At the same time, the second control signal Y controls the second input module 120 to be turned on, and the potential of the second node N2 switches. The second node N2 controls the second output module 140 to be turned on, and the potential of the output end of the light emission control circuit switches. Thus, the stability of the output signal of the light emission control circuit can be further improved.

[0113] Based on the above embodiments, optionally, Figure 14The figure is a schematic structural diagram of another light-emitting control circuit provided by an embodiment of the present invention. Refer to Figure 14 , the first reset module 170 includes a third transistor T3. The gate of the third transistor T3 is connected to the second control signal Y. The first pole of the third transistor T3 is connected to the reset signal Rest. The second pole of the third transistor T3 is electrically connected to the first node N1. With this setting in the embodiment of the present invention, the circuit structure is simple and easy to implement.

[0114] Exemplarily, if the third transistor T3 is an N-type transistor, the conduction level of the third transistor T3 is a high level. Refer to Figure 5 and Figure 14 , the reset signal Rest is at a low level. In the second stage, the second control signal Y is at a high level, and the third transistor T3 is turned on in response to the second control signal Y, outputting the low level of the reset signal Rest to the first node N1, causing the potential of the first node N1 to quickly switch to a low level, and the first output module 130 is turned off in response to the low potential of the first node N1.

[0115] Based on the above embodiment, optionally, Figure 15 The figure is a schematic structural diagram of another light-emitting control circuit provided by an embodiment of the present invention. Refer to Figure 15 , the light-emitting control circuit further includes: a second reset module 180. The second reset module 180 is electrically connected to the second node N2, and the second reset module 180 resets the second node N2 in response to the first control signal X.

[0116] Among them, in the first stage: the first control signal X can control the second reset module 180 to be turned on, so that the potential of the second node N2 quickly switches, and the second node N2 controls the second output module 140 to be turned off. At the same time, the first control signal X controls the first input module 110 to be turned on, and the potential of the first node N1 switches. The first node N1 controls the first output module 130 to be turned on, and the potential of the output end of the light-emitting control circuit switches, thereby further improving the stability of the output signal of the light-emitting control circuit.

[0117] Based on the above embodiment, optionally, Figure 16 The figure is a schematic structural diagram of another light-emitting control circuit provided by an embodiment of the present invention. Refer to Figure 16 , the second reset module 180 includes a fourth transistor T4. The gate of the fourth transistor T4 is connected to the first control signal X. The first pole of the fourth transistor T4 is connected to the reset signal Rest. The second pole of the fourth transistor T4 is electrically connected to the second node N2. With this setting in the embodiment of the present invention, the circuit structure is simple and easy to implement.

[0118] Preferably, if the fourth transistor T4 is an N-type transistor, the conduction level of the fourth transistor T4 is a high level. Refer to Figure 5 andFigure 16 , the reset signal Rest is at a low level. In the first stage, the first control signal X is at a high level, and the fourth transistor T4 turns on in response to the first control signal X, outputting the low level of the reset signal Rest to the second node N2, causing the potential of the second node N2 to quickly switch to a low level, and the second output module 140 disconnects in response to the low potential of the second node N2.

[0119] Based on the above embodiments, optionally, Figure 17 is a schematic structural diagram of another light-emitting control circuit provided by an embodiment of the present invention. Refer to Figure 17 , the first input module 110 includes: a fifth transistor T5, the gate of the fifth transistor T5 is connected to the first control signal X, the first pole of the fifth transistor T5 is connected to the first level signal V1, and the second pole of the fifth transistor T5 is electrically connected to the first node N1.

[0120] And / or, the second input module 120 includes: a sixth transistor T6, the gate of the sixth transistor T6 is connected to the second control signal Y, the first pole of the sixth transistor T6 is connected to the first level signal V1, and the second pole of the sixth transistor T6 is electrically connected to the second node N2.

[0121] And / or, the voltage clamping module 150 includes: a seventh transistor T7 and an eighth transistor T8; the gate of the seventh transistor T7 is electrically connected to the second node N2, the first pole of the seventh transistor T7 is connected to the second level signal V2, and the second pole of the seventh transistor T7 is electrically connected to the first node N1.

[0122] The gate of the eighth transistor T8 is electrically connected to the first node N1, the first pole of the eighth transistor T8 is connected to the second level signal V2, and the second pole of the eighth transistor T8 is electrically connected to the second node N2.

[0123] And / or, the first output module 130 includes: a ninth transistor T9, the gate of the ninth transistor T9 is electrically connected to the first node N1, the first pole of the ninth transistor T9 is connected to the second level signal V2, and the second pole of the ninth transistor T9 is electrically connected to the output end of the light-emitting control circuit.

[0124] And / or, the second output module 140 includes: a tenth transistor T10, the gate of the tenth transistor T10 is electrically connected to the second node N2, the first pole of the tenth transistor T10 is connected to the third level signal V3, and the second pole of the tenth transistor T10 is electrically connected to the output end of the light-emitting control circuit. With such a setting in the embodiment of the present invention, the circuit structure is simple and easy to implement.

[0125] Based on the above embodiments, optionally, the fifth transistor T5, the sixth transistor T6, the seventh transistor T7, the eighth transistor T8, the ninth transistor T9, and the tenth transistor T10 are all N-type transistors; the first level signal V1 and the third level signal V3 are both high levels, and the second level signal V2 is a low level. With such a setting in the embodiments of the present invention, the circuit structure is simple and easy to implement.

[0126] Based on the above embodiments, optionally, the voltage of the first level signal V1 is greater than or equal to the voltage of the third level signal V3. With such a setting in the embodiments of the present invention, it can ensure that the tenth transistor can be reliably turned on under the drive of the first level signal V1.

[0127] Based on the above embodiments, optionally, Figure 18 is a schematic structural diagram of another light emission control circuit provided by an embodiment of the present invention. Refer to Figure 18 , where the reset signal is a low level, and the first pole of the first transistor T1 can be connected to the second level signal V2 as the reset signal. With such a setting in the embodiments of the present invention, the type of input signal can be reduced, the circuit structure can be simplified, and it is easy to implement.

[0128] In the above embodiments, optionally, each transistor is an N-type transistor, prepared by a metal oxide semiconductor process, and specifically can be prepared by indium gallium zinc oxide (IGZO).

[0129] In the above embodiments, optionally, each transistor is a P-type transistor, prepared by a metal oxide semiconductor process, and specifically can be prepared by indium gallium zinc oxide (IGZO).

[0130] In the above embodiments, optionally, the first pole of each transistor is the source pole, and the second pole of each transistor is the drain pole; or, the first pole of each transistor is the drain pole, and the second pole of each transistor is the source pole.

[0131] The embodiments of the present invention also provide a driving method for a light emission control circuit, which is used to drive the light emission control circuit provided by any embodiment of the present invention. Figure 19 is a schematic flow diagram of a driving method for a light emission control circuit provided by an embodiment of the present invention. Refer to Figure 19 , and the driving method of the light emission control circuit includes:

[0132] S310. In the first stage, the first control signal controls the first input module to turn on, and the potential of the first node switches; the first node controls the first output module to turn on, and the potential of the output end of the light emission control circuit switches; the voltage clamping module controls the potential of the second node to be clamped, and the second node controls the second output module to turn off.

[0133] In the second stage S320, the second control signal controls the second input module to conduct, and the potential of the second node switches; the second node controls the second output module to conduct, and the potential of the output terminal of the light-emitting control circuit switches; the voltage clamping module controls the potential of the first node to be clamped, and the first node controls the first output module to disconnect; wherein, in the second stage, the voltage maintaining module performs bootstrap coupling according to the third control signal to maintain the potential of the second node.

[0134] In the driving method of the light-emitting control circuit provided by the embodiment of the present invention, in the first stage, the first input module responds to the first control signal to conduct, and the potential of the first node can be stably controlled. At the same time, the voltage clamping module controls the potential of the second node to jump to a potential opposite to that of the first node. Therefore, the first output module responds to the potential of the first node, and the second output module cannot respond to the potential of the second node, so that the first output module can stably control the potential of the output terminal of the light-emitting control circuit, thereby improving the stability of the output of the light-emitting control circuit. In the second stage, the second input module responds to the second control signal to conduct, and the potential of the second node can be stably controlled. At the same time, the voltage clamping module controls the potential of the first node to jump to a potential opposite to that of the second node. Therefore, the second output module responds to the potential of the second node, and the first output module cannot respond to the potential of the first node, so that the second output module can stably control the potential of the output terminal of the light-emitting control circuit, thereby improving the stability of the output of the light-emitting control circuit. In addition, in the second stage, the second node of the light-emitting control circuit needs to be maintained at a certain fixed potential for a long time. The voltage maintaining module is electrically connected to the second node, and the voltage maintaining module can perform bootstrap coupling according to the third control signal to supplement electric energy to the second node to stably maintain the potential of the second node.

[0135] The embodiment of the present invention further provides a display device, including: a plurality of light-emitting control circuits provided by any embodiment of the present invention connected in cascade, having corresponding beneficial effects. Figure 20 It is a schematic structural diagram of a display device provided by an embodiment of the present invention. Refer to Figure 20 , the first input module 110 of the nth-stage light-emitting control circuit accesses the output signal G of the nth-stage scanning circuit n ; the second input module of the nth-stage light-emitting control circuit accesses the output signal G of the (n + 2)th-stage scanning circuit n+2 . In this way, the nth-stage light-emitting control circuit can output a light-emitting control signal EM(n). The first input module 110 of the (n + 1)th-stage light-emitting control circuit accesses the output signal G of the (n + 1)th-stage scanning circuit n+1 ; the second input module of the (n + 1)th-stage light-emitting control circuit accesses the output signal G of the (n + 3)th-stage scanning circuit n+3In this way, the (n + 1)-th level light emission control circuit can output a light emission control signal EM(n + 1). The first input module 110 of the (n + 2)-th level light emission control circuit receives the output signal G of the (n + 2)-th level scanning circuit n+2 ; the second input module of the (n + 2)-th level light emission control circuit receives the output signal G of the (n + 4)-th level scanning circuit n+4 In this way, the (n + 2)-th level light emission control circuit can output a light emission control signal EM(n + 2).

[0136] Figure 21 It is a driving timing diagram of another light emission control circuit provided by an embodiment of the present invention Figure 21 Exemplarily shown is that the first input module of the n-th level light emission control circuit receives the output signal G of the n-th level scanning circuit n , the second input module of the n-th level light emission control circuit receives the output signal G of the (n + 2)-th level scanning circuit n+2 , and the light emission control signal EM(n) output by the n-th level light emission control circuit. The first input module of the (n + 1)-th level light emission control circuit receives the output signal G of the (n + 1)-th level scanning circuit n+1 , the second input module of the (n + 1)-th level light emission control circuit receives the output signal G of the (n + 3)-th level scanning circuit n+3 , and the light emission control signal EM(n + 1) output by the (n + 1)-th level light emission control circuit. The first input module of the (n + 2)-th level light emission control circuit receives the output signal G of the (n + 2)-th level scanning circuit n+2 , the second input module of the (n + 2)-th level light emission control circuit receives the output signal G of the (n + 4)-th level scanning circuit n+4 , and the light emission control signal EM(n + 2) output by the (n + 2)-th level light emission control circuit. The first input module of the (n + 3)-th level light emission control circuit receives the output signal G of the (n + 3)-th level scanning circuit n+3 , the second input module of the (n + 3)-th level light emission control circuit receives the output signal G of the (n + 5)-th level scanning circuit n+5 , and the light emission control signal EM(n + 3) output by the (n + 3)-th level light emission control circuit

[0137] Figure 22 It is a driving timing diagram of another light emission control circuit provided by an embodiment of the present invention Figure 21 It is Figure 22 an enlarged view of the part enclosed by the dashed line in

[0138] Among them Figure 22 shown is a timing diagram of multiple frames of light emission control signals generated by the light emission control circuit according to multiple frames of scanning signals output by the scanning circuit Figure 21 Corresponding to Figure 22Schematic diagram of the timing of the light emission control signal generated by the light emission control circuit according to the scan signal output by the scan circuit in each frame.

[0139] It can be analyzed that Figure 21 corresponding Figure 22 Each scan signal and each light emission control signal in each frame are 1 pulse signal. However, in some application scenarios, such as the blanking control of the light emitting device of the pixel circuit, the light emission control circuit needs to output multiple pulse signals within the timing of each frame.

[0140] The embodiment of the present invention can enable the light emission control circuit to output a multi-pulse light emission control signal within the timing of each frame. Exemplarily, two sets of scan circuits are provided. One set of scan circuits can output a single-pulse scan signal within the timing of each frame and provide the single-pulse scan signal to the pixel circuit. The other scan circuit outputs a multi-pulse scan signal within the timing of each frame and provides the multi-pulse scan signal to the light emission control circuit provided by the embodiment of the present invention, so that the light emission control signal output by the light emission control circuit can achieve the blanking control of the light emitting device of the pixel circuit.

[0141] It should be understood that various forms of the processes shown above can be used, steps can be reordered, added or deleted. For example, the steps described in the present invention can be executed in parallel, sequentially or in a different order, as long as the desired results of the technical solution of the present invention can be achieved, and no limitation is made herein.

[0142] The above specific implementation manners do not constitute a limitation to the protection scope of the present invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A light-emitting control circuit, characterized in that, Comprising: A first input module, a second input module, a first output module, a second output module, a voltage clamping module, and a voltage maintaining module; The output terminal of the first input module is electrically connected to the control terminal of the first output module; defining the control terminal of the first output module as a first node, the first input module controls the potential of the first node in response to a first control signal; The first output module controls the potential of the output terminal of the light-emitting control circuit in response to the potential of the first node; The output terminal of the second input module is electrically connected to the control terminal of the second output module; Defining the control terminal of the second output module as a second node, the second input module controls the potential of the second node in response to a second control signal; the second output module controls the potential of the output terminal of the light-emitting control circuit in response to the potential of the second node; A voltage clamping module, the voltage clamping module is connected between the first node and the second node, and is used to control the potentials of the first node and the second node to be opposite; The voltage maintaining module is electrically connected to the second node, and the voltage maintaining module is further connected to a third control signal; The voltage maintaining module performs bootstrap coupling according to the third control signal to maintain the potential of the second node; The voltage maintaining module includes: a coupling unit, a reset unit, and a bootstrap transmission unit; The first end of the coupling unit is electrically connected to the second node; The second end of the coupling unit is electrically connected to the reset unit, and the reset unit is used to initialize the second end of the coupling unit; and, the second end of the coupling unit is electrically connected to the bootstrap transmission unit, and the bootstrap transmission unit is used to transmit the third control signal to the second end of the coupling unit.

2. The light-emitting control circuit according to claim 1, wherein In the nth-stage light-emitting control circuit, the first control signal is the output signal of the nth-stage scanning circuit, and the second control signal is the output signal of the (n + k)th-stage scanning circuit; where, n is a positive integer, and k is a positive integer.

3. The light-emitting control circuit according to claim 2, wherein k＝2。 4. The light-emitting control circuit according to claim 1, wherein The third control signal is a first clock signal; the waveform of the first clock signal has pulses that overlap with the valid level in the waveform of the second control signal; Or, the third control signal is a second clock signal; The waveform of the second clock signal has no pulses that overlap with the valid level in the waveform of the second control signal; Or, in the nth-stage light-emitting control circuit, the third control signal is the output signal of the (n + p)th-stage light-emitting control circuit; where, both n and p are positive integers.

5. The light-emitting control circuit according to claim 4, characterized in that, p = 1 or p = 2.

6. The light emission control circuit according to claim 1, characterized in that, The coupling unit includes a first capacitor, and the first plate of the first capacitor is electrically connected to the second node; The reset unit includes a first transistor, the gate of the first transistor is electrically connected to the first node, the first pole of the first transistor is connected to a reset signal, and the second pole of the first transistor is electrically connected to the second plate of the first capacitor; The bootstrap transfer unit includes a second transistor. The gate of the second transistor is electrically connected to the second node. The first pole of the second node accesses the third control signal, and the second pole of the second node is electrically connected to the second plate of the first capacitor.

7. The light-emitting control circuit according to claim 6, characterized in that Both the first transistor and the second transistor are N-type transistors.

8. The light-emitting control circuit according to claim 7, characterized in that, The light emission control circuit further includes a second capacitor. The first plate of the second capacitor is electrically connected to the first node, and the second plate of the second capacitor accesses a reference voltage signal.

9. The light-emitting control circuit according to claim 1, wherein, Further included is: A first reset module, which is electrically connected to the first node and resets the first node in response to the second control signal.

10. The light-emitting control circuit according to claim 9, wherein, The first reset module includes a third transistor. The gate of the third transistor accesses the second control signal. The first pole of the third transistor accesses a reset signal, and the second pole of the third transistor is electrically connected to the first node.

11. The light-emitting control circuit according to claim 10, wherein The third transistor is an N-type transistor.

12. The light-emitting control circuit according to claim 1, wherein Further included is: A second reset module, which is electrically connected to the second node and resets the second node in response to the first control signal.

13. The light-emitting control circuit according to claim 12, wherein The second reset module includes a fourth transistor. The gate of the fourth transistor accesses the first control signal. The first pole of the fourth transistor accesses a reset signal, and the second pole of the fourth transistor is electrically connected to the second node.

14. The light emission control circuit according to claim 13, characterized in that, The fourth transistor is an N-type transistor.

15. The light-emitting control circuit according to claim 1, wherein The first input module includes: a fifth transistor. The gate of the fifth transistor accesses the first control signal. The first pole of the fifth transistor accesses a first level signal, and the second pole of the fifth transistor is electrically connected to the first node; And / or, the second input module includes: a sixth transistor. The gate of the sixth transistor accesses the second control signal. The first pole of the sixth transistor accesses the first level signal, and the second pole of the sixth transistor is electrically connected to the second node; And / or, the voltage clamping module includes: a seventh transistor and an eighth transistor. The gate of the seventh transistor is electrically connected to the second node. The first pole of the seventh transistor accesses a second level signal, and the second pole of the seventh transistor is electrically connected to the first node; The gate of the eighth transistor is electrically connected to the first node. The first pole of the eighth transistor accesses the second level signal, and the second pole of the eighth transistor is electrically connected to the second node; And / or, the first output module includes: a ninth transistor. The gate of the ninth transistor is electrically connected to the first node. The first pole of the ninth transistor accesses the second level signal, and the second pole of the ninth transistor is electrically connected to the output end of the light emission control circuit; And / or, the second output module includes: a tenth transistor. The gate of the tenth transistor is electrically connected to the second node. The first pole of the tenth transistor accesses a third level signal, and the second pole of the tenth transistor is electrically connected to the output end of the light emission control circuit.

16. The light-emitting control circuit according to claim 15, wherein The fifth transistor, the sixth transistor, the seventh transistor, the eighth transistor, the ninth transistor, and the tenth transistor are all N-type transistors; Both the first level signal and the third level signal are high levels, and the second level signal is a low level.

17. The light emission control circuit according to claim 16, wherein The voltage of the first level signal is greater than or equal to the voltage of the third level signal.

18. A driving method for the light-emitting control circuit according to any one of claims 1-17, characterized in that, Comprising: In the first stage, the first control signal controls the first input module to conduct, and the potential of the first node switches; The first node controls the first output module to conduct, and the potential of the output terminal of the light-emitting control circuit switches; the voltage clamping module controls the potential of the second node to be clamped, and the second node controls the second output module to be disconnected; In the second stage, the second control signal controls the second input module to conduct, and the potential of the second node switches; The second node controls the second output module to conduct, and the potential of the output terminal of the light-emitting control circuit switches; the voltage clamping module controls the potential of the first node to be clamped, and the first node controls the first output module to be disconnected; Wherein, in the second stage, the voltage maintaining module performs bootstrap coupling according to the third control signal to maintain the potential of the second node.

19. A display device, characterized in that, Comprising: A plurality of light-emitting control circuits connected in cascade as described in any one of claims 1-17.

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