Electric leakage circuit, display module and electronic equipment

Abstract

The utility model relates to the technical field of display, and discloses a leakage circuit, a display module and an electronic device, the leakage circuit comprises a first switch tube, a second switch tube and a first resistor; a first connecting end of the first switch tube is connected with a power output end of a superior circuit, a second connecting end of the first switch tube and a second connecting end of the second switch tube are both connected with a power supply of the display screen, and a control end of the first switch tube and a control end of the second switch tube are both connected with a power input end of the superior circuit. A first connecting end of the second switch tube is grounded after being connected in series with a first resistor; when a superior circuit works normally, the first switch tube is in a conducting state, and the second switch tube is in an off state; when the superior circuit is powered off, the first switch tube is in a turn-off state, and the second switch tube is in a turn-on state. According to the utility model, the discharge current of electronic components in a superior circuit can be isolated, and the discharge effect is improved.

Description

Technical Field

[0001] This utility model relates to the field of display technology, specifically to a leakage circuit, a display module, and an electronic device. Background Technology

[0002] In the display field, where liquid crystal displays (LCDs) or organic light-emitting diode displays (OLEDs) are widely used, if the internal circuitry of an LCD or OLED cannot complete the discharge process in time after a sudden power outage, it may cause bright lines to flicker on the display screen, reducing the user experience.

[0003] Currently, such as Figure 1 As shown, current leakage can be achieved by connecting a resistor in series with the power supply terminal (VCC_LCD) of the LCD or OLED and grounding it (GND). Although this method is simple, it is difficult to isolate the upstream circuit, and the upstream current will still flow to the LCD or OLED, so the current leakage effect is generally poor. Utility Model Content

[0004] In view of this, the present invention provides a leakage circuit, a display module, and an electronic device to improve the problem of mediocre leakage effect.

[0005] In a first aspect, this utility model provides a leakage circuit, which includes a first switching transistor, a second switching transistor, and a first resistor. The first connection terminal of the first switching transistor is connected to the power output terminal of the upper-level circuit, and the second connection terminals of both the first and second switching transistors are connected to the power supply of the display screen. The control terminals of both the first and second switching transistors are connected to the power input terminal of the upper-level circuit, and the first connection terminal of the second switching transistor is connected to ground in series with the first resistor. When the upper-level circuit is working normally, the first switching transistor is in the on state and the second switching transistor is in the off state. When the upper-level circuit is de-energized, the first switching transistor is in the off state and the second switching transistor is in the on state.

[0006] In this embodiment, two switching transistors are connected in series. When the upper-level circuit is working normally, the upper transistor (first switching transistor) is turned on and the lower transistor (second switching transistor) is turned off. When the upper-level circuit is powered off, the upper transistor is turned off and the lower transistor is turned on. This not only allows for rapid discharge but also isolates the discharge current of electronic components in the upper-level circuit, improving the discharge effect, reducing the possibility of display screen malfunctions when power is off, improving display effect and circuit reliability, and thus enhancing the user experience.

[0007] In one alternative implementation, the first switching transistor is an NPN transistor and the second switching transistor is a PNP transistor.

[0008] In one alternative implementation, the first switching transistor is an N-type MOSFET and the second switching transistor is a P-type MOSFET.

[0009] In one optional embodiment, the leakage circuit further includes a first capacitor and a second resistor; one end of the first capacitor and one end of the second resistor are both connected to the power input terminal of the upper-level circuit, and the other end of the first capacitor and the other end of the second resistor are both connected to the control terminal of the first switch and the control terminal of the second switch.

[0010] In this embodiment, the second resistor and the first capacitor work together to provide a bias voltage for the two switching transistors, so that the leakage circuit operates in a suitable region, ensuring the stability and normal function of the circuit.

[0011] In one optional embodiment, the leakage circuit further includes a third resistor and a fourth resistor; one end of the third resistor is connected to the power output terminal of the upper-level circuit, the other end of the third resistor is connected to the first connection terminal of the first switching transistor and one end of the fourth resistor, and the other end of the fourth resistor is connected to the second connection terminal of the first switching transistor, the second connection terminal of the second switching transistor and the power supply of the display screen.

[0012] In this embodiment, the third and fourth resistors may be reserved for subsequent debugging to achieve different circuit functions such as current limiting or voltage division.

[0013] In one alternative implementation, the upper-level circuit is a DC-DC converter.

[0014] In one optional implementation, the DC-DC converter includes a control chip, an inductor, a diode, a fifth resistor, a sixth resistor, a seventh resistor, and an output capacitor. The power input terminal is connected to the power pin of the control chip. The enable pin of the control chip is connected in series with the fifth resistor and then connected to one end of the inductor. The other end of the inductor is connected to the switch pin of the control chip and the anode of the diode. The cathode of the diode is connected to the power output terminal and one end of the output capacitor. The other end of the output capacitor is grounded. One end of the sixth resistor is connected to the cathode of the diode. The other end of the sixth resistor and one end of the seventh resistor are connected to the feedback pin of the control chip. The other end of the seventh resistor is grounded.

[0015] In one alternative embodiment, the DC-DC converter further includes an input capacitor and a filter capacitor; one end of the input capacitor is connected to the power input terminal and the power pin, and the other end of the input capacitor is grounded; one end of the filter capacitor is connected to one end of the sixth resistor and the power output terminal, and the other end of the filter capacitor is connected to the other end of the sixth resistor and one end of the seventh resistor.

[0016] Secondly, this utility model provides a display module, which includes a display screen and a leakage circuit according to the first aspect or any corresponding embodiment.

[0017] Thirdly, this utility model provides an electronic device, which includes a display module of the first aspect or any corresponding embodiment described above. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the specific embodiments or related technologies of this utility model, the drawings used in the description of the specific embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of a leakage circuit according to an embodiment of the present utility model;

[0020] Figure 2 This is a schematic diagram of another leakage circuit according to an embodiment of the present utility model;

[0021] Figure 3 This is a schematic diagram of another leakage circuit according to an embodiment of the present utility model;

[0022] Figure 4 This is a schematic diagram of another leakage circuit according to an embodiment of the present utility model;

[0023] Figure 5 This is a schematic diagram of a DC-DC converter according to an embodiment of the present invention. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the protection scope of this utility model.

[0025] A monitor is an output device used to display information such as images, text, and video, and it is widely used in scenarios such as mobile phones, computers, televisions, and wearable devices. Monitors can be divided into various types according to different classification standards; for example, monitors can be liquid crystal displays (LCDs) or organic light-emitting diode displays (OLEDs).

[0026] Specifically, LCDs utilize the photoelectric effect of liquid crystals, changing the alignment of liquid crystal molecules through voltage to control the transmission and blocking of light, thereby displaying images. The liquid crystals themselves do not emit light; instead, a backlight (such as a cold cathode fluorescent lamp or a light-emitting diode) illuminates the LCD panel, displaying various colors and images. LCDs offer advantages such as lower cost, mature technology, and relatively low power consumption. OLEDs are light-emitting diodes made of organic materials that emit light under an electric field. Each pixel can be independently controlled to emit light, eliminating the need for a backlight. Therefore, they feature fast response times, high contrast, wide viewing angles, and the ability to achieve flexible displays.

[0027] In the field of LCD and OLED displays, there is an easily overlooked yet significant issue that impacts user experience. When a device suddenly loses power, if the internal circuitry of the LCD or OLED display fails to complete the discharge process in time, it can lead to a series of frustrating display anomalies. The most common and noticeable of these is the appearance of flickering bright lines on the screen. This flickering continuously attracts the user's attention, interfering with viewing the information presented on the screen and reducing user satisfaction.

[0028] However, as Figure 1 As shown, current leakage is achieved by connecting a resistor in series with the power supply terminal (VCC_LCD) of the LCD or OLED and grounding it (GND). However, this method does not isolate the upstream and downstream circuits, allowing current from the upstream circuit to still flow into the downstream circuit, resulting in a limited leakage effect. Furthermore, it increases system power consumption. Here, the upstream circuit can refer to the external power supply or DC-DC converter that powers the display screen, while the downstream circuit can refer to the display screen's circuitry.

[0029] In view of this, the present invention provides a leakage circuit that can directly short-circuit to ground and disconnect from the upstream circuit when the equipment is powered off, thereby rapidly discharging current and isolating the discharge current of electronic components in the upstream circuit, thus improving the leakage effect.

[0030] The leakage circuit provided by this utility model will be described in detail below with reference to the accompanying drawings.

[0031] like Figure 2 As shown, the leakage circuit provided by this utility model includes a first switching transistor 210, a second switching transistor 220, and a first resistor R1.

[0032] The first connection terminal of the first switching transistor 210 is connected to the power output terminal V of the upper-level circuit. OUTThe second connection terminals of the first switching transistor 210 and the second connection terminals of the second switching transistor 220 are both connected to the power supply VCC_LCD of the display screen. The control terminals of the first switching transistor 210 and the second switching transistor 220 are both connected to the power input terminal VCC of the upper-level circuit. IN The first terminal of the second switching transistor 220 is connected in series with a first resistor R1 and then grounded. The first resistor R1 can limit the current at the first terminal and protect the switching transistor. The first resistor can be 10KΩ. Figure 2 Taking an LCD display as an example, but not limited to this.

[0033] When the upper-level circuit is working normally, the first switch 210 is in the on state and the second switch 220 is in the off state; when the upper-level circuit is powered off, the first switch 210 is in the off state and the second switch 220 is in the on state.

[0034] Specifically, when the upper-level circuit is operating normally, the power input terminal V of the upper-level circuit... IN Output a first electrical signal (such as a high-level signal) to turn on the first switch 210 and turn off the second switch 220. At this time, the power output terminal V of the upper-level circuit... OUT Connect the power supply VCC_LCD to the display screen. When the power supply VCC_LCD is powered on, it provides power to the display screen. When the upstream circuit is powered off, the power input terminal V of the upstream circuit... IN Output a second electrical signal (such as a low-level signal) to turn off the first switch 210 and turn on the second switch 220. At this time, the connection between the upper circuit and the power supply VCC_LCD of the display screen is disconnected, and the power supply VCC_LCD of the display screen is grounded and discharged.

[0035] In this embodiment, two switching transistors are connected in series. When the upper-level circuit is working normally, the upper transistor (first switching transistor) is turned on and the lower transistor (second switching transistor) is turned off. When the upper-level circuit is powered off, the upper transistor is turned off and the lower transistor is turned on. This not only allows for rapid discharge but also isolates the discharge current of electronic components in the upper-level circuit, improving the discharge effect, reducing the possibility of display screen malfunctions when power is off, improving display effect and circuit reliability, and thus enhancing the user experience.

[0036] This invention does not limit the types of the first and second switching transistors. As long as the first switching transistor is in the on state and the second switching transistor is in the off state when the upper-level circuit is working normally, and the first switching transistor is in the off state and the second switching transistor is in the on state when the upper-level circuit is powered off, it is acceptable. For example, both the first and second switching transistors can be transistors, such as triodes or metal oxide semiconductor field effect transistors (MOSFETs). MOSFETs can be called MOS transistors.

[0037] In one example, the first switch 210 can be an NPN transistor Q1, and the second switch 220 can be a PNP transistor Q3. In this case, the first connection terminal of the first switch 210 and the second switch 220 is the collector (C) of the transistor, the second connection terminal of the first switch 210 and the second switch 220 is the emitter (E) of the transistor, and the control terminal of the first switch 210 and the second switch 220 is the base (B) of the transistor.

[0038] Specifically, such as Figure 3 As shown, the collector of NPN transistor Q1 is connected to the power output terminal V of the upper-level circuit. OUT The bases of both NPN transistor Q1 and PNP transistor Q3 are connected to the power input terminal V of the upstream circuit. IN The emitters of NPN transistor Q1 and PNP transistor Q3 are both connected to the power supply VCC_LCD of the display screen. The collector of PNP transistor Q3 is connected to one end of the first resistor R1, and the other end of the first resistor R1 is grounded.

[0039] In another example, the first switch 210 can be an N-type MOSFET Q2, and the second switch 220 can be a P-type MOSFET Q4. In this case, the first connection terminal of the first switch 210 and the second switch 220 is the drain (D) of the MOSFET, the second connection terminal of the first switch 210 and the second switch 220 is the source (S) of the MOSFET, and the control terminal of the first switch 210 and the second switch 220 is the gate (G) of the MOSFET.

[0040] Specifically, such as Figure 4 As shown, the collector of the N-type MOSFET Q2 is connected to the power output terminal V of the upper-level circuit. OUT The gates of both the N-type MOSFET Q2 and the P-type MOSFET Q4 are connected to the power input terminal V of the upstream circuit. INThe source of N-type MOSFET Q2 and the source of P-type MOSFET Q4 are both connected to the power supply VCC_LCD of the display screen. The drain of P-type MOSFET Q4 is connected to one end of the first resistor R1, and the other end of the first resistor R1 is grounded.

[0041] For example, such as Figure 3 and Figure 4 As shown, the leakage circuit also includes a first capacitor C1 and a second resistor R2. The first capacitor C1 can be 1μF, and the first resistor can be 10KΩ.

[0042] Specifically, one end of the first capacitor C1 and one end of the second resistor R2 are both connected to the power input terminal V of the upper-level circuit. OUT The other end of the first capacitor C1 and the other end of the second resistor R2 are both connected to the control terminals of the first and second switching transistors.

[0043] In this embodiment, the second resistor R2 and the first capacitor C1 work together to provide a bias voltage for the two switching transistors, so that the leakage circuit operates in a suitable region, ensuring the stability and normal function of the circuit.

[0044] In some alternative implementations, such as Figure 3 and Figure 4 As shown, the leakage circuit also includes a third resistor R3 and a fourth resistor R4. The third resistor R3 can be 0KΩ, and the fourth resistor R4 can be in a not connected (NC) state.

[0045] Specifically, one end of the third resistor R3 is connected to the power output terminal V of the upper-level circuit. OUT The other end of the third resistor R3 is connected to the first connection terminal of the first switching transistor and one end of the fourth resistor R4. The other end of the fourth resistor R4 is connected to the second connection terminal of the first switching transistor, the second connection terminal of the second switching transistor, and the power supply VCC_LCD of the display screen.

[0046] In this embodiment, the third resistor R3 and the fourth resistor R4 can be reserved for subsequent debugging to achieve different circuit functions such as current limiting or voltage division.

[0047] For example, the upper-level circuit can be a DC-DC converter, which can convert the input DC voltage into another different DC voltage output, and the converted DC voltage is adapted to the voltage required by the display screen. The DC-DC converter can be a conventional DC-DC converter in the art, and this application does not impose any specific limitations.

[0048] In some embodiments, such as Figure 5As shown, the DC-DC converter may include a control chip 510, an inductor L1, a diode D1, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, and an output capacitor C. OUT .

[0049] Among them, the power input terminal V IN Connect the power supply pin (VIN) of the control chip 510. The enable pin (EN) of the control chip 510 is connected in series with the fifth resistor R5 and then connected to one end of the inductor L1. The other end of the inductor L1 is connected to the switch pin (SW) of the control chip 510 and the anode of diode D1. The cathode of diode D1 is connected to the power output terminal V. OUT and output capacitor C OUT One end, output capacitor C OUT The other end is grounded; one end of the sixth resistor R6 is connected to the cathode of diode D1, the other end of the sixth resistor R6 and one end of the seventh resistor R7 are connected to the feedback pin (Feedback, FB) of the control chip 510, and the other end of the seventh resistor R7 is grounded.

[0050] For example, the power input terminal V IN The voltage can range from 1.8V to 5.5V, for example, V. IN The voltage can be 1.8V, 3.3V, 5V, or 5.5V, etc. The fifth resistor R5 can be 10KΩ, the inductor L1 can be 10μH, and the power output terminal V... OUT The voltage can be 38V, and the control chip can be an SGM6601 chip.

[0051] Specifically, the control chip 510 integrates key components such as control circuits and power switching transistors. When the control chip is working normally (e.g., the enable pin is connected to a high level), the internal control circuit controls the power switching transistors to turn on and off according to the set parameters and feedback signals.

[0052] During the conduction period of the power switch transistor, the power input terminal V IN The circuit is connected to ground via inductor L1 and the internal conduction path of the control chip. At this point, inductor L1 begins to store energy, and the current gradually increases. When the power switch inside the control chip is turned off, the magnetic field energy in inductor L1 is converted into electrical energy, which is then supplied to the output capacitor C through diode D1. OUT It charges and provides current to the next stage of the circuitry (the circuitry of the display screen).

[0053] In this circuit, diode D1 acts as a freewheeling diode, preventing excessive back electromotive force from being generated across inductor L1, protecting other components, and ensuring that the energy in the inductor can be smoothly released to the output terminal. Output capacitor C... OUTDuring charging, the voltage across the terminals gradually increases, smoothing the output voltage, reducing ripple, improving output voltage quality, and ensuring a stable DC voltage for downstream circuits. Resistors R6 and R7 form a voltage divider network connected to the feedback pin (FB) of the control chip for output voltage feedback. The control circuit inside the chip adjusts the on and off times of the power switch based on the feedback voltage from the feedback pin, thereby achieving precise regulation and stable control of the output voltage.

[0054] That is, the power switch inside the control chip is periodically turned on and off, the inductor L1 continuously stores and releases energy, the diode D1 provides freewheeling current, and the output capacitor C... OUT The circuit performs filtering and energy storage, and the sixth resistor R6 and the seventh resistor R7 provide voltage feedback. The entire circuit works together to convert the input DC voltage into a stable output voltage (up to 38V) to provide the power required for the next stage circuit.

[0055] Optionally, such as Figure 5 As shown, the DC-DC converter may also include an input capacitor C. IN and filter capacitor C FF .

[0056] Wherein, the input capacitor C IN One end is connected to the power input terminal V IN And the power supply pin (VIN), input capacitor C IN The other end is grounded, and the filter capacitor C FF One end is connected to one end of the sixth resistor R6 and the power output terminal V. OUT Filter capacitor C FF The other end is connected to the other end of the sixth resistor R6 and one end of the seventh resistor R7.

[0057] Specifically, the input capacitor C IN It can filter out high-frequency noise and ripple in the input power supply, making the voltage input to the control chip smoother and more stable, providing a relatively clean DC operating environment for the control chip, and reducing the impact of power supply fluctuations on the internal circuitry of the control chip. Filter capacitor C FF It can filter out noise and make the output voltage smoother.

[0058] This utility model also provides a display module, which includes a display screen and a leakage circuit provided in any of the above embodiments.

[0059] This embodiment also provides an electronic device, which includes the display module provided in any of the above embodiments.

[0060] For example, the electronic device may include one or more processors, memory, input devices, output devices, and interfaces (including high-speed interfaces and low-speed interfaces) for connecting the components.

[0061] Input devices can receive input numerical or character information, and generate key signal inputs related to user settings and function control of the electronic device, such as touchscreens, keypads, mice, trackpads, touchpads, joysticks, one or more mouse buttons, trackballs, joysticks, etc. Output devices may include display devices, auxiliary lighting devices (e.g., LEDs), and haptic feedback devices (e.g., vibration motors). The aforementioned display devices include, but are not limited to, liquid crystal displays, light-emitting diodes, displays, and plasma displays. In some alternative embodiments, the display device may be a touchscreen.

[0062] The various components communicate with each other via different buses and can be mounted on a common motherboard or otherwise as required. The processor can process instructions that execute within the electronic device, including instructions stored in or on memory to display graphical information of a GUI on external input / output devices (such as display devices coupled to an interface).

[0063] The processor can be a central processing unit, a network processor, or a combination thereof. The processor may further include hardware chips. These hardware chips can be application-specific integrated circuits (ASICs), programmable logic devices (PLDs), or combinations thereof. The programmable logic devices can be complex programmable logic devices (CLPs), field-programmable gate arrays (FPGAs), general-purpose array logic (GDAs), or any combination thereof.

[0064] The memory may include a program storage area and a data storage area. The program storage area may store the operating system and applications required for at least one function; the data storage area may store data created based on the use of the computer device. Furthermore, the memory may include high-speed random access memory and non-transitory memory, such as at least one disk storage device, flash memory device, or other non-transitory solid-state storage device. In some alternative embodiments, the memory may include memory remotely located relative to the processor, which can be connected to the electronic device via a network. Examples of such networks include, but are not limited to, the Internet, intranets, local area networks, mobile communication networks, and combinations thereof.

[0065] The memory may include volatile memory, such as random access memory; the memory may also include non-volatile memory, such as flash memory, hard disk or solid-state drive; the memory may also include a combination of the above types of memory.

[0066] In the description of this specification, the references to terms such as "this embodiment," "an embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0067] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0068] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the present invention.

Claims

1. A bleeder circuit, characterized by, The leakage circuit comprises a first switch tube, a second switch tube and a first resistor; The first connection end of the first switch tube is connected to the power output end of the upper circuit, the second connection end of the first switch tube and the second connection end of the second switch tube are both connected to the power supply of the display screen, the control end of the first switch tube and the control end of the second switch tube are both connected to the power input end of the upper circuit, and the first connection end of the second switch tube is connected to the ground in series with the first resistor; When the upper circuit is normally working, the first switch tube is in the on state and the second switch tube is in the off state; when the upper circuit is powered off, the first switch tube is in the off state and the second switch tube is in the on state.

2. The bleeding circuit of claim 1, wherein, The first switch tube is an NPN triode, and the second switch tube is a PNP triode.

3. The bleeding circuit of claim 1, wherein, The first switch tube is an N-type MOS tube, and the second switch tube is a P-type MOS tube.

4. The bleeder circuit according to any one of claims 1 to 3, characterized in that, The leakage circuit further comprises a first capacitor and a second resistor; One end of the first capacitor and one end of the second resistor are both connected to the power input end of the upper circuit, and the other end of the first capacitor and the other end of the second resistor are both connected to the control end of the first switch tube and the control end of the second switch tube.

5. The bleeder circuit according to any one of claims 1 to 3, characterized in that, The leakage circuit further comprises a third resistor and a fourth resistor; One end of the third resistor is connected to the power output end of the upper circuit, the other end of the third resistor is connected to the first connection end of the first switch tube and one end of the fourth resistor, and the other end of the fourth resistor is connected to the second connection end of the first switch tube, the second connection end of the second switch tube and the power supply of the display screen.

6. The bleeding circuit according to any one of claims 1 to 3, characterized in that, The upper circuit is a DC-DC converter.

7. The bleeding circuit of claim 6, wherein, The DC-DC converter comprises a control chip, an inductor, a diode, a fifth resistor, a sixth resistor, a seventh resistor and an output capacitor; The power input end is connected to the power pin of the control chip, the enable pin of the control chip is connected to one end of the inductor in series with the fifth resistor, the other end of the inductor is connected to the switch pin of the control chip and the anode of the diode, the cathode of the diode is connected to the power output end and one end of the output capacitor, and the other end of the output capacitor is grounded; One end of the sixth resistor is connected to the cathode of the diode, and the other end of the sixth resistor and one end of the seventh resistor are connected to the feedback pin of the control chip, and the other end of the seventh resistor is grounded.

8. The bleeding circuit of claim 7, wherein, The DC-DC converter further comprises an input capacitor and a filter capacitor; One end of the input capacitor is connected to the power input end and the power pin, the other end of the input capacitor is grounded, one end of the filter capacitor is connected to one end of the sixth resistor and the power output end, and the other end of the filter capacitor is connected to the other end of the sixth resistor and one end of the seventh resistor.

9. A display module, characterized by The display module comprises a display screen and the leakage circuit according to any one of claims 1 to 8.

10. An electronic device, comprising: The electronic device comprises the display module according to claim 9.

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