Pixel unit driving circuit and display panel

Abstract

The present application relates to a pixel unit driving circuit and a display panel, in which a switching module (300) of the driving circuit controls the on / off of a light emitting unit (100) and a pre-charge module (500) according to a horizontal scanning signal transmitted by a main control module (200); when the light emitting unit (100) is disconnected from the pre-charge module (500), a trigger module (400) controls the on / off of a power supply unit (600) and a pre-charge module (500), and the on / off of a pre-charge power supply unit (700) and a pre-charge module (500) according to the horizontal scanning signal transmitted by the main control module (200); when the light emitting unit (100) is conductive to the pre-charge module (500), the light emitting unit (100) performs light emission display according to the power supply voltage transmitted by the power supply unit (600) via the pre-charge module (500) and the pre-charge voltage generated by the pre-charge module (500) being conductive to the pre-charge power supply unit (700).

Description

[Technical field]

[0001] This application claims priority to a patent application filed with the State Intellectual Property Office of the People's Republic of China on May 18, 2022, bearing application number 202210551407.8 and title "Pixel Unit Driving Circuit and Display Panel," the entire contents of which are incorporated herein by reference.

[0002] The present application relates to the field of display technology, and in particular to a driving circuit for a pixel unit and a display panel. [Background technology]

[0003] Among related technologies, LED displays have many advantages such as low voltage, energy saving, and long service life, and are therefore currently widely used in various fields.

[0004] In the related technology, when the light-emitting device (e.g., micro-LED) in the display panel is turned off, the light-emitting device maintains a certain connection with the corresponding power supply unit and is not completely cut off, which makes the light-emitting device of the display panel very easy to be damaged and shortens the display life of the display panel; in addition, in the related technology, the light-emitting device of the display panel turns on again after being turned off, which is not sensitive and affects the display effect.

[0005] There is no effective solution to the problem of short display life of display panels in the related art. Summary of the Invention [Problem to be solved by the invention]

[0006] SUMMARY OF THE DISCLOSURE The present application provides a driving circuit for a pixel unit and a display panel, in order to at least solve the problem of short display life of the display panel in the related art. [Means for solving the problem]

[0007] According to one aspect, the present application provides a driving circuit of a pixel unit for driving a light-emitting unit of a pixel unit, the driving circuit including a main control module, a switching module, a trigger module, a pre-charge module, a power supply unit, and a pre-charge power supply unit, the main control module is electrically connected to the switching module and the trigger module respectively, and transmits a horizontal scanning signal to the switching module and the trigger module, the switching module is further electrically connected to the light-emitting unit and the pre-charge module respectively, the trigger module is further electrically connected to the pre-charge module, the pre-charge module is further electrically connected to the power supply unit and the pre-charge power supply unit respectively, the switching module the trigger module is used to control the on / off of the light-emitting unit and the pre-charge module based on the received horizontal scanning signal, the trigger module is used to control the on / off of the power supply unit and the pre-charge module and the on / off of the pre-charge power supply unit and the pre-charge module based on the received horizontal scanning signal when the light-emitting unit is disconnected from the pre-charge module, the light-emitting unit is used to perform light-emitting display under the control of the power supply voltage transmitted by the power supply unit via the pre-charge module when the light-emitting unit is connected to the pre-charge module, and to perform light-emitting display under the control of the pre-charge voltage generated by the pre-charge module being connected to the pre-charge power supply unit.

[0008] According to another aspect, the present application provides a display panel, comprising a plurality of pixel units, the pixel units including a light-emitting unit and a driving circuit for driving the light-emitting unit, the driving circuit including the driving circuit according to the first aspect. Effect of the Invention

[0009] Compared with the related art, the present application provides a driving circuit for a pixel unit and a display panel, in which a main control module, a switching module, a trigger module, a pre-charge module, a power supply unit and a pre-charge power supply unit are provided, and a horizontal scanning signal is transmitted to the switching module and the trigger module through the main control module, so that the switching module controls the on-off of the light-emitting unit and the pre-charge module according to the received horizontal scanning signal, and the trigger module controls the on-off of the power supply unit and the pre-charge module according to the received horizontal scanning signal when the light-emitting unit is disconnected from the pre-charge module, and controls the on-off of the pre-charge power supply unit and the pre-charge module according to the received horizontal scanning signal. When the light-emitting unit is controlled to be off and is connected to the pre-charge module, the light-emitting unit performs light-emitting display under the control of the power supply voltage transmitted by the power receiving unit via the pre-charge module, and performs light-emitting display under the control of the pre-charge voltage generated by the pre-charge module being connected to the pre-charge power supply unit; and when the light-emitting unit is turned off, the light-emitting unit is completely cut off from the power supply unit, which solves the problem of short display life of the display panel in the related art. By cutting off the light-emitting unit from the power supply unit and pre-charging it in the control process of turning off the light-emitting unit, the light-emitting unit is protected, the response speed of the light-emitting display of the light-emitting unit is improved, and the beneficial effects of the display response sensitivity and display effect are improved.

[0010] Details of one or more embodiments of the present application are set forth in the following drawings and description to make other features, objects and advantages of the present application more concise and easy to understand.

[0011] The drawings herein are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application, and together with the specification serve to explain the principles of the present application.

[0012] In order to more clearly describe the technical means in the embodiments of the present application or the prior art, the following briefly describes the drawings that need to be used in the description of the embodiments or the prior art, and obviously, those skilled in the art can derive other drawings based on these drawings without paying creative labor. [Brief description of the drawings]

[0013] [Figure 1] FIG. 2 is a logic block diagram of a driving circuit of a pixel unit according to an embodiment of the present application; [Diagram 2] FIG. 1 is a logic block diagram of a driving circuit of a pixel unit according to a preferred embodiment of the present application; [Diagram 3] 1 is a topography of a pre-charge module, a switching module and a light-emitting unit according to an embodiment of the present application; [Figure 4] 2 is a topography of a switching module and a light emitting unit according to an embodiment of the present application; [Diagram 5] 1 is a topography of a trigger module according to an embodiment of the present application. [Figure 6] FIG. 2 is a logic block diagram of a driving circuit of a pixel unit according to a preferred embodiment of the present application; [Figure 7] 2 is a topography of a driving circuit of a pixel unit according to an embodiment of the present application; DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] In order to make the purpose, technical means and advantages of the embodiments of the present application clearer, the technical means in the embodiments of the present application will be described below clearly and completely with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are not all the embodiments, but only some of the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without performing creative labors belong to the scope of protection of the present application.

[0015] Hereinafter, technical means in the embodiments of the present application will be described with reference to the drawings in the embodiments of the present application.

[0016] FIG. 1 is a logical block diagram of a pixel unit driving circuit according to an embodiment of the present application, and FIG. 7 is a topography of a pixel unit driving circuit according to an embodiment of the present application. The pixel unit driving circuit shown in FIG. 1 and FIG. 7 is used to drive the emission of the light emitting unit 100 of the pixel unit.

[0017] 1 and 7, the driving circuit of the pixel unit according to the embodiment of the present application includes a light emitting unit 100 in the figure, the light emitting unit 100 can be a micro light emitting diode (Micro-LED), but is not limited to a micro light emitting diode. The driving circuit includes a main control module 200, a switching module 300, a trigger module 400, a pre-charge module 500, a power supply unit 600, and a pre-charge power supply unit 700, the main control module 200 is electrically connected to the switching module 300 and the trigger module 400 respectively, the main control module 200 can transmit horizontal scanning signals to the switching module 300 and the trigger module 400 respectively, the switching module 300 is further electrically connected to the light emitting unit 100 and the pre-charge module 500 respectively, the trigger module 400 is further electrically connected to the pre-charge module 500 respectively, the pre-charge module 500 is further electrically connected to the power supply unit 600 and the pre-charge power supply unit 700 respectively.

[0018] The switching module 200 may receive the horizontal scanning signal sent by the main control module 200, and the switching module 200 may control the on / off of the circuit between the light-emitting unit 100 and the pre-charge module 500 based on the received horizontal scanning signal.

[0019] When the light emitting unit 100 is disconnected from the pre-charge module 500, the trigger module 400 controls the on / off of the circuit between the power supply unit 600 and the pre-charge module 500 based on the received horizontal scanning signal, and the trigger module 400 controls the on / off of the circuit between the pre-charge power supply unit 700 and the pre-charge module 500 based on the received horizontal scanning signal.

[0020] When the light-emitting unit 100 is connected to the pre-charge module 500, the light-emitting unit 100 performs light emission display under the control of the power supply voltage transmitted by the power receiving unit 600 via the pre-charge module 500, and the light-emitting unit 100 performs light emission display under the control of the pre-charge voltage generated by the pre-charge module 500 being connected to the pre-charge power supply unit 700.

[0021] In this embodiment, a power supply voltage is applied to one end of the light-emitting unit 100, and a pre-charge voltage is applied to the other end of the light-emitting unit 100. When the voltage difference between the power supply voltage and the pre-charge voltage is greater than the rated on-voltage of the light-emitting unit 100, i.e., the voltage drop of the diode, the light-emitting unit 100 emits light for display.

[0022] In this embodiment, the main control module 200 includes a microcontroller, which may include, but is not limited to, one of a one-chip microcontroller, a digital signal processing (abbreviated as DSP), and a field-programmable gate array (abbreviated as FPGA).

[0023] In this embodiment, the horizontal scanning port of the main control module 200 is electrically connected to the control port of the switching module 300, the input terminal of the pre-charge module 500 is electrically connected to the power supply unit 600 and the pre-charge power supply unit 700, the input terminal of the switching module 200 is connected to the output terminal of the pre-charge module 500, and the output terminal of the switching module 300 is connected to the light-emitting unit 100.

[0024] In order to form a complete circuit loop, when the light-emitting unit 100 is controlled to be turned off, the power supply corresponding to the light-emitting unit 100 is completely cut off. In this embodiment, the switching module 300 includes a first switching unit 31 and a second switching unit 32, and the pre-charge module 500 includes a first pre-charge unit 51 and a second pre-charge unit 52.

[0025] A first input port of the first pre-charge unit 51 is electrically connected to the positive power supply terminal (see Vdd in FIG. 3) of the power supply unit 600, a second input port of the first pre-charge unit 51 is electrically connected to one voltage port (see Va in FIG. 3) of the pre-charge power supply unit 700, and an output terminal of the first pre-charge unit 51 is electrically connected to the input terminal of the first switching unit 31.

[0026] The output terminal of the first switching unit 31 is electrically connected to the first terminal of the light emitting unit 100 .

[0027] The second terminal of the light emitting unit 100 is electrically connected to the input terminal of the second switching unit 32 .

[0028] The output terminal of the second switching unit 32 is electrically connected to the output terminal of the second pre-charge unit 52; A first input port of the second pre-charge unit 52 is electrically connected to a negative power supply terminal (e.g., a negative power supply electrode or ground) of the power supply unit 600, and a second input port of the second pre-charge unit 52 is electrically connected to another voltage port (see Vb in FIG. 3) of the pre-charge power supply unit 700, and the voltage supplied from the other voltage port is set to a voltage other than the voltage at which the light-emitting unit 100 emits light for display.

[0029] In this embodiment, the control of the main control module 200 to the switching module 300 is to simultaneously control the first switching unit 31 and the second switching unit 32, thereby connecting or disconnecting both ends of the light-emitting unit 100 to the corresponding pre-charge unit.

[0030] In this embodiment, the light-emitting unit 100 is the smallest pixel unit of the display panel, and the light-emitting unit 100 may be a micro-light-emitting diode (Micro-LED), where the anode of the micro-light-emitting diode corresponds to the first terminal of the light-emitting unit 100, and the cathode of the micro-light-emitting diode corresponds to the second terminal of the light-emitting unit 100.

[0031] In this embodiment, the power supply unit 600 supplies power to the light-emitting unit 100, and in this embodiment, the power supply unit 600 supplies a DC voltage (for example, the voltage value of the DC voltage can be 5V, 3.3V or 1.8V) to the light-emitting unit 100. The pre-charge power supply unit 700 can pre-charge the light-emitting unit 100 through the corresponding charging element of the pre-charge module 500 by supplying a corresponding voltage after the light-emitting unit 100 is turned off this time and before the next light-emitting display, thereby providing stored energy with a set voltage value for the light-emitting unit 100 to light-emitting display, so that the light-emitting unit 100 can respond quickly when displaying next time, and avoid the display effect being affected due to a slow display response speed.

[0032] In this embodiment, the pre-charge power supply unit 700 and the power supply unit 600 may use the same power supply module or different power supply modules. When the same power supply module is used, the pre-charge power supply unit 700 and the power supply unit 600 correspond to different voltage output ports of the power supply module, and the voltage value of the output voltage of the voltage output port corresponding to the pre-charge power supply unit 700 is set to a voltage value smaller than the power supply voltage of the power supply unit 600.

[0033] In this embodiment, the horizontal scanning signal port of the main control module 200 is connected to the input terminal of the trigger module 400. In this embodiment, the trigger of the trigger module 4000 mainly considers the relevant control during the turning off of the light-emitting unit 100, that is, the control at the stage where the horizontal scanning signal changes from high level to low level and does not return to high level. After the horizontal scanning signal changes to high level, the light-emitting unit 100 emits light, but because there is no relevant trigger mechanism, it is considered that the light-emitting unit 100 completes the light-emitting display after the horizontal scanning signal changes to high level.

[0034] In some embodiments, the trigger module 400 is triggered using a falling edge of the horizontal scan signal, i.e., when the horizontal scan signal changes from a high level to a low level, the trigger module 400 is triggered to control the on / off of the circuit between the power supply unit 600 and the pre-charge module 500, and correspondingly generate a related control signal to control the on / off of the circuit between the pre-charge power supply unit 700 and the pre-charge module 500.

[0035] In this embodiment, when the trigger module 400 is activated, the level of the horizontal scanning signal received by the switching module 300 is low. In this case, the switching module 300 cuts off both ends of the light-emitting unit 100 to the pre-charge module 500, thereby realizing the power off.

[0036] In this embodiment, a main control module 200, a switching module 300, a trigger module 400, a pre-charge module 500, a power supply unit 600 and a pre-charge power supply unit 700 are installed, and a horizontal scanning signal is transmitted to the switching module 300 and the trigger signal module 400 via the main control module 200. The switching module 300 controls the on / off of the circuit between the light-emitting unit 100 and the pre-charge module 500 based on the received horizontal scanning signal, thereby realizing isolation between the light-emitting unit 100 and the power supply even when the power supply of the input light-emitting unit 100 is cut off. When the light-emitting unit 100 is disconnected from the pre-charge module 500, the trigger module 400 controls the on / off of the circuit between the power supply unit 600 and the pre-charge module 500 based on the received horizontal scanning signal, and the trigger module 400 controls the on / off of the circuit between the pre-charge power supply unit 700 and the pre-charge module 500 based on the received horizontal scanning signal, thereby realizing the isolation of the light-emitting unit 100 from the power supply and supplying the light-emitting unit 100 with stored energy for the next light emission. Thus, when the light-emitting unit 100 is connected to the pre-charge module 500, the light-emitting unit 100 performs light emission display under the control of the power supply voltage transmitted by the power receiving unit 600 through the pre-charge module 500, and performs light emission display under the control of the pre-charge voltage generated by the pre-charge module 500 being connected to the pre-charge power supply unit 700.

[0037] In this embodiment, the light-emitting response of the light-emitting unit 100 is fast, which solves the problems of the short display life and poor display response sensitivity of the display panel in the related art, thereby providing protection for the light-emitting unit 100, improving the light-emitting display response speed of the light-emitting unit 100, and improving the beneficial effects of the display response sensitivity and display effect.

[0038] FIG. 2 is a logical block diagram 1 of a driving circuit of a pixel unit according to a preferred embodiment of the present application, and FIG. 3 is a topography of a pre-charge module, a switching module and a light-emitting unit according to an embodiment of the present application. In order to realize isolation from the power supply and pre-charging when the light-emitting unit 100 is turned off, refer to FIGS. 1 to 3 and 7. In some embodiments, the pre-charge module 500 includes a first pre-charge unit 51 and a second pre-charge unit 52, the first pre-charge unit 51 includes a dual-channel switching unit 501 and a charging element 502, and the second pre-charge unit 52 also includes a dual-channel switching unit 501 and a charging element 502.

[0039] The first input terminal of the dual channel switching unit 501 of the first pre-charge unit 51 is electrically connected to the positive power port (Vdd in FIG. 3 and FIG. 7) of the power supply unit 600, and the second input terminal of the dual channel switching unit 501 of the first pre-charge unit 51 is electrically connected to the first port (Va in FIG. 7) of the charging power supply unit 700. The first input terminal of the dual channel switching unit 501 of the second pre-charge unit 52 is electrically connected to the negative power port (Vss in FIG. 3 and FIG. 7, in practice, the negative power port may be the common ground GND) of the power supply unit 600, and the second input terminal of the dual channel switching unit 501 of the second pre-charge unit 52 is electrically connected to the second port (Vb in FIG. 3 and FIG. 7, the voltage of the second port is a voltage that cannot make the light-emitting unit 100 emit light) of the pre-charge power supply unit 700. The output terminal of the trigger module 400 is electrically connected to the first and second controlled terminals of the dual channel switching unit 501 of the first pre-charge unit 51, and the output terminal of the trigger module 400 is further electrically connected to the first and second controlled terminals of the dual channel switching unit 501 of the second pre-charge unit 52. The electrical contacts between the first and second output terminals of the dual channel switching unit 501 of the first pre-charge unit 51 are electrically connected to the electrical contacts between the charging element 502 (see C1 in FIG. 3 and FIG. 7) and the switching module 300. The electrical contacts between the first and second output terminals of the dual channel switching unit 501 of the second pre-charge unit 52 are electrically connected to the electrical contacts between the charging element 502 (see C2 in FIG. 3 and FIG. 7) and the switching module 300. The charging element 502 is grounded away from the end electrically connected to the switching module 300.

[0040] When the light-emitting unit 100 and the pre-charge module 500 are disconnected, the trigger module 400 generates a trigger signal to control the dual-channel switching unit 501 according to the received horizontal scanning signal.

[0041] The dual-channel switching unit 501 controls the switching module 300 to make either the power supply unit 600 or the pre-charge power supply unit 700 conductive according to the trigger signal output by the trigger module 400 .

[0042] The charging element 502 may be precharged based on a precharge voltage provided by the precharge power supply unit 700 .

[0043] When the switching module 300 conducts the pre-charge power supply unit 700 and disconnects the pre-charge module 500 from the light-emitting unit 100, the pre-charge module 500 controls the charging element 502 to pre-charge, and when the switching module 300 conducts the pre-charge module 500 to the light-emitting unit 100, the pre-charge module 500 controls the power supply unit 600 to conduct to the light-emitting unit 100.

[0044] In this embodiment, the trigger module 400 is triggered by using the falling edge of the horizontal scanning signal, and when the dual-channel switching unit 501 receives a corresponding trigger signal, it correspondingly controls the switching module 300 to disconnect from the power supply unit 600 and the pre-charge power supply unit 700 to be conductive, or controls the switching module 300 to disconnect from the pre-charge power supply unit 700 and connect to the power supply unit 600.

[0045] In this embodiment, when the precharge voltage of the charging element 502 (corresponding to the charging element 502 of the first precharge unit 51) reaches a preset threshold, the precharge is stopped and the voltage is stabilized via the charging element 502.

[0046] In this embodiment, when the horizontal scanning signal changes from a preset low level to a high level, the switching module 300 conducts the pre-charge module 500 to the light-emitting unit 100. In this case, due to the pre-charging of the charging element 502, the light-emitting unit 100 is powered by the power supply voltage (see Vdd in Figures 3 and 7) and the pre-charge voltage (see Va in Figures 3 and 7) supplied by the power supply unit 600 to emit light, and the light-emitting response of the light-emitting unit 100 is fast.

[0047] In some embodiments, in order to realize the isolation and pre-charging of the switching module 300 and the power supply unit 600 of the pre-charge module 500, referring to FIG. 3 and FIG. 7, the dual-channel switching unit 501 includes a first switching transistor (see T1 and T2 in FIG. 2) and a second switching transistor (see T6 and T7 in FIG. 3 and FIG. 7), and the input terminal of the first switching transistor is connected to the first input terminal. connection The input terminal of the second switching transistor is connected to the second input terminal. connection The control terminal of the first switching transistor is connected to the first controlled terminal. connection The control terminal of the second switching transistor is connected to the second controlled terminal. connection The output terminal of the first switching transistor is connected to the first output terminal. connection The output terminal of the second switching transistor is connected to the second output terminal. connection will be done.

[0048] The first switching transistor is used for controlling its input terminal to be conductive to the output terminal when the level of the trigger signal received by its control terminal is a preset low level, and for controlling its input terminal to be disconnected from the output terminal when the level of the trigger signal received by its control terminal is a preset high level.

[0049] The second switching transistor is used for controlling its input terminal to be disconnected from the output terminal when the level of the trigger signal received by its control terminal is a preset low level, and for controlling its input terminal to be conductive to the output terminal when the level of the trigger signal received by its control terminal is a precharge high level.

[0050] When the input terminal of the first switching transistor is conductive to the output terminal and the input terminal of the second switching transistor is disconnected from the output terminal, the dual-channel switching unit 501 controls the pre-charge power supply unit 700 to be conductive to the switching module 300; and when the input terminal of the first switching transistor is disconnected from the output terminal and the input terminal of the second switching transistor is conductive to the output terminal, the dual-channel switching unit 501 controls the power supply unit 600 to be conductive to the switching module 300.

[0051] In this embodiment, the input terminal and the output terminal of the first switching transistor corresponding to the first pre-charge unit 51 and the second pre-charge unit 52 are synchronously controlled to be conductive or cut off, that is, when the input terminal of the first switching transistor of the first pre-charge unit 51 is conductive to the output terminal, the input terminal and the output terminal of the first switching transistor of the second pre-charge unit 52 are also conductive or cut off. In addition, the input terminal of the second switching transistor corresponding to the first pre-charge unit 51 and the second pre-charge unit 52 is synchronously controlled to be conductive or cut off, and the conduction or cut off of the circuit loop of the corresponding channel is realized by the conduction or cut off of the switching transistor corresponding to the first pre-charge unit 51 and the second pre-charge unit 52. For example, when the input terminal of the first switching transistor corresponding to the first pre-charge unit 51 and the second pre-charge unit 52 is conductive to the output terminal, in this case, the power supply unit 600 and the light-emitting unit 100 form a corresponding circuit loop, and the light-emitting unit 100 performs light-emitting display.

[0052] The first and second switching transistors in the embodiments of the present application include, but are not limited to, transistors, MOS transistors, and thin film transistors. According to the contents disclosed in the present application, a person skilled in the art can easily change the dual channel switching unit 501 disclosed in the present application into a dual channel switching unit according to the selected type of switching transistor based on the specific selected type of switching transistor, so the present application can be realized whether the switching transistor is an NPN or PNP type transistor, an N-channel or P-channel switching MOS transistor, an N-type thin film transistor or a P-type thin film transistor, and is not limited in the embodiments of the present application.

[0053] In some embodiments, the first switching transistor is a P-type switching transistor, such as a P-type MOS transistor or a P-type thin film transistor, and the second switching transistor is an N-type switching transistor, such as an N-type MOS transistor or an N-type thin film transistor.

[0054] In some embodiments, the charging element includes a capacitor (see C1, C2 in FIG. 2).

[0055] FIG. 4 is a topography of a switching module and a light-emitting unit according to an embodiment of the present application. In order to realize the on-off control between both ends of the light-emitting unit and the corresponding power source, and realize the light-emitting unit being illuminated or turned off, refer to FIG. 1 to FIG. 4 and FIG. 7. In some embodiments, the switching module 300 includes a first switching unit 31 and a second switching unit 32, and the first switching unit 31 is connected to a third input terminal (see the electrical contact between the switching transistor T12 and the switching transistor T1, and the electrical contact between the switching transistor T7 and the capacitor C1 in FIG. 3 to FIG. 4 and FIG. 7). , a third output terminal (see the electrical contact between the switching transistor T12 and the light-emitting unit 100 in Figures 3-4 and 7) and a third control terminal (see the electrical contact between the switching transistor T11 and the main control module in Figures 3-4 and 7), the third input terminal is electrically connected to the first output terminal and the second output terminal of the dual channel switching unit 501 of the first pre-charge unit 51, the third output terminal is electrically connected to the first terminal of the light-emitting unit 100, and the third control terminal is electrically connected to the horizontal scanning signal port of the main control module 200.

[0056] The second switching unit 32 includes a fourth input terminal (see the electrical contact between the switching transistor T13 and the switching transistor T2, and the switching transistor T6 and the capacitor C2 in Figures 3-4 and 7), a fourth output terminal (see the electrical contact between the switching transistor T13 and the light-emitting unit 100 in Figures 3-4 and 7), and a fourth control terminal (see the electrical contact between the switching transistor T13 and the main control module in Figures 3-4 and 7), where the fourth input terminal is electrically connected to the second terminal of the light-emitting unit 100, the fourth output terminal is electrically connected to the first output terminal and the second output terminal of the dual channel switching unit 501 of the second pre-charge unit 52, and the fourth control terminal is also electrically connected to the horizontal scanning signal port of the main control module 200.

[0057] The first switching unit 31 is used for controlling the on / off of the third input terminal and the third output terminal according to the horizontal scanning signal received by the third control terminal.

[0058] In this embodiment, the main control module 200 outputs a corresponding horizontal scanning signal (correspondingly high or low level, where high level is represented by "1" and low level is represented by "0") along its horizontal scanning signal port, and when the control signal received by the third control terminal is at high level, the first switching unit 31 correspondingly controls the third input terminal to be conductive to the third output terminal, i.e. controls the first terminal to be conductive to the first pre-charge unit 51; when the horizontal scanning signal received by the third control terminal is at low level, the first switching unit 41 correspondingly controls the third input terminal to be disconnected from the third output terminal, i.e. controls the first terminal to be disconnected from the first pre-charge unit 51.

[0059] The second switching unit 32 is used for controlling the on / off of the fourth input terminal and the fourth output terminal according to the horizontal scanning signal received by the fourth control terminal.

[0060] In this embodiment, the horizontal scanning signal received by the fourth control terminal is the same as the horizontal scanning signal received by the third control terminal, that is, when the horizontal scanning signal received by the third control terminal is at a high level, the fourth control terminal also receives a horizontal scanning signal at a high level, and the second switching unit 32 correspondingly controls the fourth input terminal to be conductive to the fourth output terminal, that is, controls the second terminal to be connected to a negative power supply (see Vss in Figs. 3-4 and 7). When the horizontal scanning signal received by the third control terminal is at a low level, the fourth control terminal also receives a horizontal scanning signal at a low level, and the second switching unit 32 correspondingly controls the fourth input terminal to be disconnected from the fourth output terminal, that is, controls the second terminal to be disconnected from the corresponding negative power supply.

[0061] When the third input terminal is conductive to the third output terminal and the fourth input terminal is conductive to the fourth output terminal, the switching module 300 controls the light-emitting unit 100 to be conductive to the pre-charge module 500, and when the third input terminal is disconnected from the third output terminal and the fourth input terminal is disconnected from the fourth output terminal, the switching module 300 controls the light-emitting unit 100 to be disconnected from the pre-charge module 500.

[0062] In order to realize the on-off control between both ends of the light-emitting unit and the corresponding power source, and further realize the light-emitting unit 100 being illuminated or turned off, referring to FIGS. 1 to 4 and 7, in some embodiments, the first switching unit 31 includes a first controlled switch (see the switching transistor T11 in FIGS. 3, 4 and 7) and a second controlled switch (see the switching transistor T12 in FIGS. 3, 4 and 7), the second switching unit 32 includes a third controlled switch (see the switching transistor T13 in FIGS. 3, 4 and 7), and the controlled terminal of the first controlled switch is connected to the third control terminal. connection The input terminal of the first controlled switch is electrically connected to the first data port (see network symbol DATA in FIG. 7) of the main control module 200, the output terminal of the first controlled switch is electrically connected to the controlled terminal of the second controlled switch, and the input terminal of the second controlled switch is electrically connected to the third input terminal. connection The output terminal of the second controlled switch is connected to the third output terminal. connection The controlled terminal of the third controlled switch is connected to the fourth control terminal. connection The input terminal of the third controlled switch is connected to the fourth input terminal. connection The output terminal of the third controlled switch is connected to the fourth output terminal. connection will be done.

[0063] The first controlled switch is used for controlling the on-off of the input terminal and the output terminal of the first controlled switch according to the horizontal scanning signal received by the controlled terminal of the first controlled switch.

[0064] In this embodiment, the main control module 200 sends a corresponding horizontal scanning signal (which is high or low level, where high level is represented by "1" and low level is represented by "0") along its horizontal scanning signal port; when the horizontal scanning signal received by the controlled terminal of the first controlled switch is at high level, the input terminal of the first controlled switch is connected to the output terminal, and when the horizontal scanning signal received by the controlled terminal of the first controlled switch is at low level, the input terminal of the first controlled switch is disconnected from the output terminal.

[0065] The second controlled switch is used to control the input terminal of the second controlled switch to be conductive to the output terminal when the input terminal of the first controlled switch is conductive to the output terminal, and to control the input terminal of the second controlled switch to be disconnected from the output terminal when the input terminal of the first controlled switch is disconnected from the output terminal.

[0066] The third controlled switch is used for controlling the on-off of the input terminal and the output terminal of the third controlled switch according to the horizontal scanning signal received by the controlled terminal of the third controlled switch.

[0067] In this embodiment, the horizontal scanning signal received by the controlled terminal of the third controlled switch is the same as the horizontal scanning signal received by the controlled terminal of the first controlled switch, that is, when the horizontal scanning signal received by the controlled terminal of the first controlled switch is at a high level, the horizontal scanning signal received by the controlled terminal of the third controlled switch is also at a high level, and the third controlled switch correspondingly controls its input terminal to be conductive to the output terminal, so that the second terminal is connected to the negative power supply or ground; when the horizontal scanning signal received by the controlled terminal of the first controlled switch is at a low level, the controlled terminal of the third controlled switch also receives a low level control signal, but the third controlled switch correspondingly controls its input terminal to be disconnected from the output terminal, so that the second terminal is disconnected to the negative power supply or ground.

[0068] In the embodiment of the present application, the first controlled switch, the second controlled switch, and the third controlled switch are all switching transistors. In the embodiment, the switching transistor includes, but is not limited to, a transistor, a MOS transistor, and a thin film transistor. According to the contents disclosed in the present application, a person skilled in the art can easily think of changing the first controlled switch T, the second controlled switch, and the third controlled switch disclosed in the present application to a controlled switch corresponding to the selected type of switching transistor based on the specific selected type of switching transistor, so the switching transistor can be realized whether it is an NPN type or PNP type transistor, an N-channel or P-channel switching MOS transistor, an N-type thin film transistor, or a P-type thin film transistor, and is not limited in the embodiment of the present application.

[0069] In some embodiments, the first controlled switch, the second controlled switch and the third controlled switch are all N-type switching transistors, for example N-type thin film transistors.

[0070] FIG. 5 is a topography of a trigger module according to an embodiment of the present application, for providing a pre-charge voltage to a light-emitting unit 100. In some embodiments, referring to FIGS. 1-2, 5 and 7, the trigger module 400 includes a first flip-flop U1, a second flip-flop U2, an inverter (as shown in FIGS. 5 and 7, U4 and U5 are both inverters) and a CMOS inversion unit 41, the first flip-flop U1 includes a first set port (see 1D in FIGS. 5 and 7), a first reset port (see 1C in FIGS. 5 and 7) and a first state output port, the second flip-flop U2 includes a second set port (see 2D in FIGS. 5 and 7), a second reset port (see 2C in FIG. 2) and a second state output port, and the first reset port is connected to the input terminal of the trigger module 400. connectionThe first reset port is electrically connected to a second reset port through one inverter (see U4 in FIG. 5 and FIG. 7 ), the first state output port is electrically connected to a second set port, the second state output port is electrically connected to an input terminal of a CMOS inversion unit 41 and electrically connected to the first set port through one inverter (see U5 in FIG. 5 and FIG. 7 ), and the output terminal of the CMOS inversion unit 41 is electrically connected to an output terminal of the trigger module 400. connection will be done.

[0071] The first flip-flop U1 is used for outputting the level at the first set port before the level of the horizontal scanning signal changes as a first state signal through the first state output port when the level of the horizontal scanning signal received by the first reset port changes to a preset low level, and for outputting the level at the first set port as a first state signal through the first state output port when the level of the horizontal scanning signal received by the first reset port changes to a preset high level.

[0072] The second flip-flop U2 is used for outputting the first state signal received by the second set port before the level of the horizontal scanning signal changes as a second state signal through the second state output port when the level of the horizontal scanning signal received at the port changes to a predetermined low level due to the second reset, and for outputting the first state signal received by the second set port as a second state signal through the second state output port when the level of the horizontal scanning signal received at the port changes to a predetermined high level due to the second reset.

[0073] The CMOS inversion unit 41 is used to invert the second state signal, generate an enable signal to control the on / off of the circuit between the power supply unit 600 and the pre-charge module 500, and generate an enable signal to control the on / off of the circuit between the pre-charge power supply unit 700 and the pre-charge module 500.

[0074] In this embodiment, the first flip-flop U1 and the second flip-flop U2 are both D-type latches. When the horizontal scanning signal jumps from high level to low level, the output of the first state output port of the first flip-flop U1 maintains the state of the first set port just before the falling edge of the horizontal scanning signal arrives, and then does not change with the state of the first set port. After the horizontal scanning signal passes through the inverter U4, the horizontal scanning signal received by the second reset port of the second flip-flop U2 becomes high level, so that the output of the second state output port of the second flip-flop U2 is the same as the input of the second set port, and the second set port of the second flip-flop U2 is the output of the first state output port of the first flip-flop U1, so that the output of the second state output port of the second flip-flop U2 is the same as the state of the first set port just before the falling edge of the horizontal scanning signal arrives.

[0075] In some embodiments, to further provide a pre-charge voltage to the light-emitting unit 100, refer to Figures 2, 5 and 7, the first flip-flop U1 and the second flip-flop U2 both include falling edge flip-flops, the CMOS inversion unit 41 includes a third switching transistor T4 and a fourth switching transistor T5, the controlled terminals of the third switching transistor T4 and the fourth switching transistor T5 are both connected to the second state output port, the input terminal of the third switching transistor T4 is electrically connected to a first power supply (see Vup in Figures 5 and 7), the output terminals of the third switching transistor T4 are respectively electrically connected to the input terminal of the fourth switching transistor T5 and the output terminal of the trigger module 400, and the output terminal of the fourth switching transistor T5 is grounded.

[0076] The third switching transistor T4 is used for controlling its input terminal to be conductive to the output terminal when the second state signal received by its controlled terminal is at a preset low level, and for controlling its input terminal to be disconnected from the output terminal when the second state signal received by its controlled terminal is at a preset high level.

[0077] The fourth switching transistor T5 is used for controlling its input terminal to be disconnected from the output terminal when the second state signal received by its controlled terminal is at a preset low level, and for controlling its input terminal to be conductive to the output terminal when the second state signal received by its controlled terminal is at a preset high level.

[0078] The CMOS inverting unit 41 is used for converting the second state signal having a predetermined low level into an enable signal having a predetermined high level when the input terminal of the third switching transistor T4 is connected to the output terminal and the input terminal of the fourth switching transistor T5 is disconnected from the output terminal, and for converting the second state signal having a predetermined high level into an enable signal having a predetermined low level when the input terminal of the third switching transistor T4 is disconnected from the output terminal and the input terminal of the fourth switching transistor T5 is connected to the output terminal.

[0079] In addition, the CMOS inversion unit 41 uses an upper P lower N CMOS structure, which has a very small static power consumption, a very small threshold voltage range, and a close to ideal switch, and with CMOS, the voltage supplied from the first power supply is used to control the third switching transistor T4 and the fourth switching transistor T5, thereby avoiding the problem of insufficient thrust output by the flip-flop.

[0080] The third switching transistor T4 and the fourth switching transistor T5 in the embodiment of the present application include, but are not limited to, transistors, MOS transistors, and thin film transistors. According to the contents disclosed in the present application, it is easy for a person skilled in the art to change the CMOS inversion unit 41 disclosed in the present application to a CMOS inversion unit according to the specific selected type of switching transistor, so the switching transistor can be realized in the present application whether it is an NPN or PNP type transistor, an N-channel or P-channel switching MOS transistor, or an N-type thin film transistor or a P-type thin film transistor, and is not limited in the embodiment of the present application.

[0081] In some embodiments, the third switching transistor T4 is a P-type switching transistor, such as a PNP transistor, a P-channel MOS transistor, or a P-type thin film transistor.

[0082] In some embodiments, the fourth switching transistor T5 is an N-type switching transistor, such as an NPN transistor, an N-channel MOS transistor, or an N-type thin film transistor.

[0083] In some embodiments, in order to reduce interference, high-precision control is performed on the pre-charge voltage of the light-emitting unit 100, and the horizontal scanning signal port and the input terminal of the trigger module 400 are further serially connected to a first diode D1, the anode of the first diode D1 is electrically connected to the horizontal scanning signal port, and the cathode of the first diode D1 is electrically connected to the input terminal of the trigger module 400.

[0084] The first diode 41 is used to rectify the horizontal scanning signal input to the trigger module. By the first diode 41 rectifying the horizontal scanning signal, clutter in the horizontal scanning signal is filtered out, so that the trigger module 400 can receive an accurate trigger signal and avoid false triggering.

[0085] FIG. 6 is a second logical block diagram of a driving circuit of a pixel unit according to a preferred embodiment of the present application. In order to enable the voltage after pre-charging to reach a stable state, in some embodiments, with reference to FIGS. 6 to 7, the driving circuit further includes a feedback unit 800, a detection terminal of the feedback unit 800 is electrically connected to the electrical contact between the charging element 502 and the switching module 300 (see the electrical contact between the capacitor C1 and the switching transistor T1, and between the switching transistor T7 and the switching transistor T12 in FIG. 7), and an output terminal of the feedback unit 800 is electrically connected to the input terminal of the trigger module 400 (see the electrical contact between the first diode D1 and the inverter U4 in FIG. 7); The feedback unit 800 is used to detect whether the pre-charge voltage generated by the pre-charging of the charging element 502 (correspondingly detecting the voltage of C1 in FIG. 7) is less than a preset threshold, and feed back a corresponding feedback signal to the trigger module 400.

[0086] The trigger module 400 is used to generate a pre-charge shut-off trigger signal when the feedback signal indicates that the pre-charge voltage is above a preset threshold.

[0087] The dual-channel switching unit 501 is used for controlling the pre-charge power supply unit 700 and the switching module 300 to be cut off according to the pre-charge cut-off trigger signal output by the trigger module 400 .

[0088] In this embodiment, when the pre-charge power supply unit 700 is disconnected from the switching module 300, it indicates that the pre-charge is terminated, and the corresponding charging element 502 stabilizes the voltage that completes the pre-charge.

[0089] The charging element 502 is used to stop the pre-charging when the feedback signal indicates that the pre-charging voltage is above a preset threshold.

[0090] In some embodiments, the feedback unit 800 includes a voltage comparator U3, a non-inverting input terminal of the voltage comparator U3 electrically connected to the second power supply V2, and an inverting input terminal of the voltage comparator U1 electrically connected to the detection terminal of the feedback unit 800. connection The output terminal of the voltage comparator U3 is connected to the output terminal of the feedback unit 800. connection The voltage comparator U3 is used for detecting the magnitude of the voltage corresponding to the precharge voltage and the second power supply V2, and outputting a corresponding feedback signal.

[0091] In this embodiment, when the magnitude of the pre-charge voltage Va reaches the preset threshold, it passes through the voltage comparator U3 and outputs a low level, and then outputs a falling edge to the trigger module 400, which is the second falling edge after the trigger module 400 triggers the pre-charge module 500 to pre-charge. Because the level of the first set port of the first flip-flop U1 is high, the output of the second state output port of the second flip-flop U2 is low, and outputs a high level after being inverted by the CMOS inversion unit 41. The dual-channel switching unit 501 cuts off the pre-charge power supply unit 700 and the switching module 300, and at the same time cuts off the pre-charge voltage Vb corresponding to the second pre-charge unit 52, thereby realizing the maintenance of the pre-charged voltage and the stabilization of the voltage, and accelerating the response speed of the light-emitting unit 100 when it emits light, and realizing the isolation protection of the light-emitting unit 100.

[0092] An embodiment of the present application provides a pixel unit including a light-emitting unit and a driving circuit for driving the light-emitting unit to emit light, where the driving circuit includes the driving circuit of the pixel unit in the above-mentioned embodiment.

[0093] An embodiment of the present application further provides a display panel including a plurality of pixel units, the pixel units including a light-emitting unit and a driving circuit for driving the light-emitting unit, the driving circuit being the driving circuit in the above-mentioned embodiment.

[0094] It should be noted that, in this specification, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that such an actual relationship or order exists between those entities or operations. Furthermore, the terms "comprise", "include", or any other variation thereof are intended to cover a non-exclusive inclusion, whereby a process, method, article, or device that includes a set of elements includes not only those elements, but also other elements not expressly listed or that are inherent to such process, method, article, or device. In the absence of further limitations, an element limited by the phrase "comprising a" does not exclude the presence of further identical elements in the process, method, article, or device that includes the element.

[0095] The above are merely specific embodiments of the present disclosure that enable those skilled in the art to understand or practice the present disclosure. Various modifications to these examples will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other examples without departing from the spirit or scope of the present disclosure. Therefore, the present disclosure is not limited to these examples shown herein, but is accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A driving circuit for a pixel unit for driving a light-emitting unit of a pixel unit, comprising a main control module, a switching module, a trigger module, a precharge module, a power supply unit, and a precharge power supply unit, wherein the main control module is electrically connected to the switching module and the trigger module respectively, transmits a horizontal scanning signal to the switching module and the trigger module, the switching module is further electrically connected to a first terminal and a second terminal of the light-emitting unit and the precharge module respectively, the trigger module is further electrically connected to the precharge module, and the precharge module is further electrically connected to the power supply unit and the precharge power supply unit respectively, The switching module is used to control the on / off between the first terminal and the second terminal of the light-emitting unit and the precharge module based on the received horizontal scanning signal. The trigger module is used to control the on / off between the power supply unit and the precharge module and the on / off between the precharge power supply unit and the precharge module based on the received horizontal scanning signal when the first terminal and the second terminal of the light-emitting unit are disconnected from the precharge module. The light-emitting unit is used to perform light-emitting display under the control of the power supply voltage transmitted by the power supply unit through the precharge module and under the control of the precharge voltage generated when the precharge module is connected to the precharge power supply unit when the first terminal and the second terminal of the light-emitting unit are connected to the precharge module. The pre-charge module includes a first pre-charge unit and a second pre-charge unit. Both the first pre-charge unit and the second pre-charge unit respectively include a dual-channel switching unit and a charging element. The first input terminal of the dual-channel switching unit corresponding to the first pre-charge unit is electrically connected to the positive power supply port of the power supply unit. The second input terminal of the dual-channel switching unit corresponding to the first pre-charge unit is electrically connected to the first port of the pre-charge power supply unit. The first input terminal of the dual-channel switching unit corresponding to the second pre-charge unit is electrically connected to the negative power supply port of the power supply unit. The second input terminal of the dual-channel switching unit corresponding to the second pre-charge unit is electrically connected to the second port of the pre-charge power supply unit. The first controlled terminal and the second controlled terminal of each dual-channel switching unit are both electrically connected to the output terminal of the trigger module. The first output terminal and the second output terminal of the dual-channel switching unit are both electrically connected to one end of the corresponding charging element of the switching module, and the other end of the corresponding charging element is grounded. The trigger module is used to generate a trigger signal for controlling the dual-channel switching unit based on the horizontal scanning signal received by the trigger module when the first terminal and the second terminal of the light-emitting unit are disconnected from the pre-charge module. The dual-channel switching unit is used to control the switching module to conduct to either the power supply unit or the pre-charge power supply unit based on the trigger signal output by the trigger module. The charging element is used to perform pre-charging based on the pre-charge voltage supplied from the pre-charge power supply unit. The pre-charge module is a drive circuit used to control the charging element to pre-charge when the switching module conducts the pre-charge power supply unit and the switching module cuts off the pre-charge module from the first terminal and the second terminal of the light-emitting unit, and to control the power supply unit to conduct to the first terminal and the second terminal of the light-emitting unit when the switching module conducts the pre-charge module to the first terminal and the second terminal of the light-emitting unit.

2. The dual-channel switching unit includes a first switching transistor and a second switching transistor. The input terminal of the first switching transistor is connected to the first input terminal, the input terminal of the second switching transistor is connected to the second input terminal, the control terminal of the first switching transistor is connected to the first controlled terminal, the control terminal of the second switching transistor is connected to the second controlled terminal, the output terminal of the first switching transistor is connected to the first output terminal, and the output terminal of the second switching transistor is connected to the second output terminal. The first switching transistor is used to control its input terminal to conduct to the output terminal when the level of the trigger signal received by its control terminal is a preset low level, and to control its input terminal to be cut off from the output terminal when the level of the trigger signal received by its control terminal is a preset high level. The second switching transistor is used to control its input terminal to be cut off from the output terminal when the level of the trigger signal received by its control terminal is a preset low level, and to control its input terminal to conduct to the output terminal when the level of the trigger signal received by its control terminal is a preset high level. The dual-channel switching unit is used to control the precharge power supply unit to conduct to the switching module when the input terminal of the first switching transistor is conducted to the output terminal and the input terminal of the second switching transistor is cut off from the output terminal, and to control the power supply unit to conduct to the switching module when the input terminal of the first switching transistor is cut off from the output terminal and the input terminal of the second switching transistor is conducted to the output terminal. The drive circuit according to claim 1.

3. The first switching transistor is one of a P-type MOS transistor and a P-type thin film transistor, and / or the second switching transistor is one of an N-type MOS transistor and an N-type thin film transistor. The drive circuit according to claim 2.

4. The switching module includes a first switching unit and a second switching unit. The first switching unit includes a third input terminal, a third output terminal, and a third control terminal. The second switching unit includes a fourth input terminal, a fourth output terminal, and a fourth control terminal. The third input terminal is electrically connected to the first output terminal and the second output terminal of the dual-channel switching unit of the first precharge unit. The third output terminal is electrically connected to the first terminal of the light-emitting unit. The third control terminal is electrically connected to the horizontal scanning signal port of the main control module. The fourth input terminal is electrically connected to the second terminal of the light-emitting unit. The fourth output terminal is electrically connected to the first output terminal and the second output terminal of the dual-channel switching unit of the second precharge unit. The fourth control terminal is electrically connected to the horizontal scanning signal port of the main control module. The first switching unit is used to control the on / off between the third input terminal and the third output terminal based on the horizontal scanning signal received by the third control terminal. The second switching unit is used to control the on / off between the fourth input terminal and the fourth output terminal based on the horizontal scanning signal received by the fourth control terminal. The switching module is used to control the light-emitting unit to be electrically connected to the pre-charge module when the third input terminal is electrically connected to the third output terminal and the fourth input terminal is electrically connected to the fourth output terminal, and to control the light-emitting unit to be disconnected from the pre-charge module when the third input terminal is disconnected from the third output terminal and the fourth input terminal is disconnected from the fourth output terminal. The drive circuit according to claim 1.

5. The first switching unit includes a first controlled switch and a second controlled switch, the second switching unit includes a third controlled switch, a controlled terminal of the first controlled switch is connected to the third control terminal, an input terminal of the first controlled switch is electrically connected to a first data port of the main control module, an output terminal of the first controlled switch is electrically connected to a controlled terminal of the second controlled switch, an input terminal of the second controlled switch is connected to the third input terminal, an output terminal of the second controlled switch is connected to the third output terminal, a controlled terminal of the third controlled switch is connected to the fourth control terminal, an input terminal of the third controlled switch is connected to the fourth input terminal, and an output terminal of the third controlled switch is connected to the fourth output terminal. The first controlled switch is used to control the on / off between the input terminal and the output terminal of the first controlled switch based on the horizontal scanning signal received by the controlled terminal of the first controlled switch. The second controlled switch is used to control the input terminal of the second controlled switch to be electrically connected to the output terminal when the input terminal of the first controlled switch is electrically connected to the output terminal, and to control the input terminal of the second controlled switch to be disconnected from the output terminal when the input terminal of the first controlled switch is disconnected from the output terminal. The third controlled switch is used to control the on / off between the input terminal and the output terminal of the third controlled switch based on the horizontal scanning signal received by the controlled terminal of the third controlled switch. The drive circuit according to claim 4.

6. The first controlled switch is an N-type thin film transistor, the second controlled switch is an N-type thin film transistor, and / or the third controlled switch is an N-type thin film transistor. The drive circuit according to claim 5.

7. The trigger module includes a first flip-flop, a second flip-flop, an inverter, and a CMOS inversion unit. The first flip-flop includes a first set port, a first reset port, and a first state output port. The second flip-flop includes a second set port, a second reset port, and a second state output port. The first reset port is connected to the input terminal of the trigger module and electrically connected to the horizontal scanning signal port. The first reset port is further electrically connected to the second reset port through the inverter. The first state output port is electrically connected to the second set port. The second state output port is electrically connected to the input terminal of the CMOS inversion unit and electrically connected to the first set port through the inverter. The output terminal of the CMOS inversion unit is connected to the output terminal of the trigger module. The first flip-flop is used to output the level at the first set port as a first state signal along the first state output port before the level of the horizontal scanning signal changes when the level of the horizontal scanning signal received by the first reset port changes to a preset low level, and to output the level at the first set port as a first state signal along the first state output port when the level of the horizontal scanning signal received by the first reset port changes to a preset high level. The second flip-flop is used to output the first state signal received by the second set port as a second state signal along the second state output port before the level of the horizontal scanning signal changes when the level of the horizontal scanning signal received by the second reset port changes to a preset low level, and to output the first state signal received by the second set port as a second state signal along the second state output port when the level of the horizontal scanning signal received by the second reset port changes to a preset high level. The CMOS inverter unit is used to invert the second state signal, generate an enable signal for controlling the on / off of the circuit between the power supply unit and the precharge module, and generate an enable signal for controlling the on / off of the circuit between the precharge power supply unit and the precharge module, according to the drive circuit of claim 4.

8. Both the first flip-flop and the second flip-flop include falling-edge flip-flops. The CMOS inverter unit includes a third switching transistor and a fourth switching transistor. The controlled terminals of the third switching transistor and the fourth switching transistor are both connected to the second state output port. The input terminal of the third switching transistor is electrically connected to a first power supply. The output terminal of the third switching transistor is electrically connected to the input terminal of the fourth switching transistor and the output terminal of the trigger module respectively. The output terminal of the fourth switching transistor is grounded. The third switching transistor is used to control its input terminal to conduct to the output terminal when the second state signal received by its controlled terminal is at a preset low level, and to control its input terminal to be disconnected from the output terminal when the second state signal received by its controlled terminal is at a preset high level. The fourth switching transistor is used to control its input terminal to be disconnected from the output terminal when the second state signal received by its controlled terminal is at a preset low level, and to control its input terminal to conduct to the output terminal when the second state signal received by its controlled terminal is at a preset high level. The CMOS inversion unit is used to convert the second state signal, which has a preset low level, into an enable signal with a preset high level when the input terminal of the third switching transistor is conducted to the output terminal and the input terminal of the fourth switching transistor is disconnected from the output terminal, and to convert the second state signal, which has a preset high level, into an enable signal with a preset low level when the input terminal of the third switching transistor is disconnected from the output terminal and the input terminal of the fourth switching transistor is conducted to the output terminal. The drive circuit according to claim 7.

9. The third switching transistor is one of a PNP transistor, a P-channel MOS transistor, or a P-type thin film transistor, and / or the fourth switching transistor is one of an NPN transistor, an N-channel MOS transistor, or an N-type thin film transistor. The drive circuit according to claim 8.

10. The horizontal scanning signal port and the input terminal of the trigger module are further connected in series to a first diode. The anode of the first diode is electrically connected to the horizontal scanning signal port, and the cathode of the first diode is electrically connected to the input terminal of the trigger module. The first diode is used to rectify the horizontal scanning signal input to the trigger module. The drive circuit according to claim 7.

11. Further comprising a feedback unit, the detection terminal of the feedback unit is electrically connected to the electrical contact between the charging element and the switching module, and the output terminal of the feedback unit is electrically connected to the input terminal of the trigger module. The feedback unit is used to detect whether the precharge voltage generated by the precharge of the charging element is less than a preset threshold value, and feedback a corresponding feedback signal to the trigger module. The trigger module is used to generate a precharge cutoff trigger signal when the feedback signal indicates that the precharge voltage is greater than or equal to a preset threshold value. The dual-channel switching unit is used to control the charging power supply unit to be cut off from the switching module based on the pre-charge cutoff trigger signal output by the trigger module. The charging element is used to stop pre-charging when the feedback signal indicates that the pre-charge voltage is equal to or higher than a preset threshold value. The drive circuit according to claim 1.

12. The feedback unit includes a voltage comparator. The non-inverting input terminal of the voltage comparator is electrically connected to a second power supply. The inverting input terminal of the voltage comparator is connected to the detection terminal of the feedback unit. The output terminal of the voltage comparator is connected to the output terminal of the feedback unit. The voltage comparator is used to detect the magnitudes of the pre-charge voltage and the voltage corresponding to the second power supply and output the corresponding feedback signal. The drive circuit according to claim 11.

13. The main control module includes a microcontroller. The microcontroller includes one of a one-chip microcomputer, a DSP, and an FPGA. The drive circuit according to claim 1.

14. A display panel including a plurality of pixel units. Each pixel unit includes a light-emitting unit and a drive circuit for driving the light-emitting unit. The drive circuit is the drive circuit according to any one of claims 1 to 13.

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