Liquid crystal panel discharge circuit, discharge method thereof, display chip and electronic device

Abstract

The present disclosure provides a liquid crystal panel discharge circuit and a discharge method thereof, a display chip and an electronic device. The circuit comprises: a plurality of first switch modules, the first end of each first switch module being connected with a reference voltage signal end, and the second end of each first switch module being grounded; a plurality of second switch modules, the first end of each second switch module being connected with the first end of a corresponding first switch module; a plurality of third switch modules, the first end of each third switch module being connected with the second end of a corresponding second switch module, and each second end of each third switch module being connected with each display signal output end in a corresponding group; and a controller, the controller being connected with the third end of each first switch module, the third end of each second switch module, the third end and the fourth end of each third switch module, and being used for determining a start shutdown action and controlling each first switch module, each second switch module and each third switch module to release the stored charge in the liquid crystal panel and avoid screen flashing.

Description

Technical Field

[0001] This disclosure relates to the field of display technology, and in particular to a liquid crystal panel discharge circuit and discharge method thereof, a display chip, and an electronic device. Background Technology

[0002] In LCD panel display applications, the discharge problem of LCD panels is a major concern. Due to the need to reduce the power consumption of LCD panels, low refresh rates have been proposed. However, while meeting the requirement of low refresh rates, the retention time of the stored charge inside the LCD panel needs to be increased. In doing so, a new problem is introduced: the release of the stored charge inside the LCD panel is relatively slow, making it difficult to discharge when the power is off.

[0003] Therefore, how to solve the problem of the release of stored charge inside the LCD panel when the power is off is an urgent issue that needs to be addressed. Summary of the Invention

[0004] This disclosure presents a liquid crystal panel discharge circuit and method, a display chip, and an electronic device. The specific solution is as follows:

[0005] One embodiment of this disclosure provides a liquid crystal panel discharge circuit, including:

[0006] Multiple first switch modules, each first switch module has its first terminal connected to a reference voltage signal terminal, and its second terminal grounded;

[0007] Multiple second switch modules, wherein the first end of each second switch module is connected to the first end of the corresponding first switch module;

[0008] Multiple third switch modules, the first end of each third switch module is connected to the second end of the corresponding second switch module, and each second end of each third switch module is connected to each display signal output terminal in the corresponding group;

[0009] The controller is connected to the third terminal of each of the first switch modules, the third terminal of each of the second switch modules, the third terminal of each of the third switch modules, and the fourth terminal of each of the third switch modules. The controller is used to determine the start and stop actions and control each of the first switch modules, the second switch modules, and the third switch modules to release the stored charge inside the liquid crystal panel.

[0010] Another embodiment of this disclosure proposes a discharge method based on the above-described liquid crystal panel discharge circuit, comprising the following steps:

[0011] Confirm the start and shutdown actions;

[0012] Each of the first switch module, each of the second switch module, and each of the third switch modules is controlled to release the stored charge inside the liquid crystal panel.

[0013] Another aspect of this disclosure provides a display chip that includes the liquid crystal panel discharge circuit described above.

[0014] In another aspect, this disclosure provides an electronic device that includes the display chip described above.

[0015] The technical solutions provided by the embodiments of this disclosure have at least the following beneficial effects:

[0016] According to embodiments of this disclosure, a liquid crystal panel discharge circuit includes: a plurality of first switching modules, each with a first terminal connected to a reference voltage signal terminal and a second terminal grounded; a plurality of second switching modules, each with a first terminal connected to the first terminal of a corresponding first switching module; a plurality of third switching modules, each with a first terminal connected to the second terminal of a corresponding second switching module and a second terminal of each third switching module connected to a display signal output terminal in a corresponding group; and a controller connected to the third terminals of each of the first, second, and third switching modules and their fourth terminals. The controller is used to determine start-up and shutdown actions and control each of the first, second, and third switching modules to release the charge stored inside the liquid crystal panel. Therefore, when a start-up and shutdown action is determined, this circuit, through the control of each of the first, second, and third switching modules, can ensure synchronous discharge to ground when there is no voltage difference between the reference voltage signal terminal and the display signal output terminal, thus avoiding screen flickering.

[0017] Additional aspects and advantages of this disclosure will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this disclosure. Attached Figure Description

[0018] The above and / or additional aspects and advantages of this disclosure will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, in which:

[0019] Figure 1 This is a schematic diagram of a source IC burning out due to electrostatic discharge (ESD) in a related technology.

[0020] Figure 2 This is a waveform diagram of the LCD panel losing power when no discharge circuit is added in the related technology;

[0021] Figure 3 This is a schematic diagram of the display principle within a liquid crystal panel in related technologies;

[0022] Figure 4 This is a circuit diagram of the liquid crystal panel discharge circuit in related technologies;

[0023] Figure 5 Is using Figure 4 The liquid crystal panel discharge circuit shown is a simplified circuit diagram of one line.

[0024] Figure 6 This is a schematic diagram of the structure of the liquid crystal panel discharge circuit according to an embodiment of the present disclosure;

[0025] Figure 7 Is using Figure 6 The liquid crystal panel discharge circuit shown is a simplified circuit diagram of one line.

[0026] Figure 8 This is a waveform diagram of the LCD panel losing power when the discharge circuit is added to this disclosure;

[0027] Figure 9 This is a diagram illustrating the timing of the simultaneous power outage of Sout and Vcom.

[0028] Figure 10 This is a flowchart of a discharge method for a liquid crystal panel discharge circuit according to an embodiment of the present disclosure. Detailed Implementation

[0029] To enable those skilled in the art to better understand the technical solutions of this disclosure, the technical solutions in the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings.

[0030] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this disclosure are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this disclosure described herein can be implemented in orders other than those illustrated or described herein. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this disclosure. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this disclosure as detailed in the appended claims.

[0031] The following description, with reference to the accompanying drawings, describes a liquid crystal panel discharge circuit, a discharge method for the liquid crystal panel discharge circuit, a display chip, and an electronic device according to embodiments of the present disclosure.

[0032] Before introducing the liquid crystal panel discharge circuit disclosed herein, let's first introduce the liquid crystal panel discharge circuit in related technologies.

[0033] In LCD panel display applications, a significant challenge is the release of stored charge within the LCD panel. The need to reduce LCD panel power consumption has led to the development of low refresh rates. However, achieving low refresh rates increases the retention time of stored charge within the LCD panel. This introduces a new problem: the release of stored charge is relatively slow, making it difficult to discharge the charge when the device is turned off.

[0034] In particular, if the LCD panel uses an Oxide (silicon oxide) process, its reference voltage signal terminal Vcom (Vcom is the reference voltage for the displacement of liquid crystal molecules, used to rotate the liquid crystal) discharges slowly when the power is off. Typically, an external PCB (Printed Circuit Board) or Source IC is used to help the reference voltage signal terminal Vcom complete its discharge. For example, after power-off, a Source IC can quickly pull the output voltage of the display signal output terminal Sout (such as S1-S960) to ground GND, resulting in a large voltage difference between Vcom and Sout.

[0035] Assuming the LCD panel is used in a television (TV), actual tests show that when the TV is off, the voltage difference between Vcom and Sout is 5V. This voltage difference exceeds the set voltage difference of 4V, and the duration of this voltage difference is 10ms, exceeding the set voltage difference duration of 2ms. At this point, the brightness difference caused by the voltage difference and its duration can be perceived by the naked eye, resulting in flickering on the LCD screen. Furthermore, because of this voltage difference between Vcom and Sout, residual charge remains on the LCD panel each time the TV is turned off. After repeated power cycles, this can lead to polarization of the LCD panel.

[0036] To address the Vcom discharge issue during power-off, the source IC can be initiated to discharge Vcom during power-off. However, since the source IC's operating circuit incorporates the high-voltage Vcom port, this presents a greater challenge to the source IC. In practical applications, such as... Figure 1 As shown, the introduction of the high-voltage Vcom port in the working circuit of the Source IC can cause the Source IC to burn out due to electrostatic discharge (ESD).

[0037] Figure 2 This is a power-down waveform diagram of the LCD panel without a discharge circuit, as shown in the relevant technology. Figure 2As shown, there is a large voltage difference between Sout and Vcom, and this voltage difference lasts for a long time. The power-down sequence at this time is VDDD (VDDD is the power supply for the control logic) and VDDA (VDDA is the power supply for controlling the output of Sout), followed by... Figure 3 As shown, the integrated power supply circuit PMIC and Source IC start up and then shut down. Vcom and Sout are the outputs of the PMIC and Source IC, respectively. They are not related and each shuts down on its own.

[0038] Figure 4 This is a circuit diagram of a liquid crystal panel discharge circuit in related technologies, such as... Figure 4 As shown, in related technologies, Vcom is introduced into the Source IC. The internal circuit design of the Source IC is as follows:

[0039] When the source IC detects that the voltages of VDDA and VDDD have dropped below the corresponding set threshold voltage, it will initiate the shutdown action. At this time, the switch S-CS is turned on, and all output channels in the source IC, such as CH12[1:40] and CH12[41:80], are shorted together to share charge. Then, S21, S22, and S23 are turned on at the same time, so that the external Vcom is shorted with CS_NETL and Vcom is shorted with CS_NETR, and then they are discharged to ground GND together. Figure 5 Is using Figure 4 The liquid crystal panel discharge circuit shown is a simplified circuit diagram of one circuit. Figure 5 In the diagram, C1 is the parasitic capacitance between Sout and R21, and C2 is the parasitic capacitance between Vcom and R22. Figure 4 The problem with the solution shown is that when R21 is smaller than R22, Sout can quickly discharge to GND through S22, but Vcom discharges very slowly because it is connected to a large charge on the PCB. That is, Sout discharges faster than Vcom, so even if Vcom is connected to the inside of the Source IC, it cannot achieve the purpose of fast discharge, and screen flickering will still occur.

[0040] To address the aforementioned issues, this disclosure proposes a novel liquid crystal panel discharge circuit that enables rapid discharge after power loss, thereby preventing screen flickering.

[0041] Figure 6 This is a schematic diagram of the structure of the liquid crystal panel discharge circuit according to an embodiment of the present disclosure.

[0042] like Figure 6As shown, the liquid crystal panel discharge circuit of this embodiment includes: a plurality of first switch modules 81, a plurality of second switch modules 82, a plurality of third switch modules 83, and a controller (not shown in the figure).

[0043] In this configuration, the first terminal of each first switch module 81 is connected to the reference voltage signal terminal Vcom, and the second terminal of each first switch module 81 is grounded to GND. The reference voltage signal terminal Vcom may include Vcom_L (a reference voltage signal terminal Vcom located on the left side of the Source IC) and Vcom_R (a reference voltage signal terminal Vcom located on the right side of the Source IC). Each reference voltage signal terminal Vcom is connected through a reference voltage signal line Line and is used to input a reference voltage signal. The first terminal of each second switch module 82 is connected to the first terminal of the corresponding first switch module 81. The first terminal of each third switch module 83 is connected to the second terminal of the corresponding second switch module 82, and the second terminal of each third switch module 83 is connected to each display signal output terminal Sout in the corresponding group. Each group of display signal output terminals Sout includes 12 display signal output terminals such as S[1]-S

[12] , ..., S

[481] -S

[492] . Each display signal output terminal Sout is used to output the corresponding display voltage signal. The controller is connected to the third terminal of each first switch module 81, the third terminal of each second switch module 82, the third terminal of each third switch module 83, and the fourth terminal of each third switch module 83. The controller is used to determine the start and stop actions and control each first switch module 81, each second switch module 82, and each third switch module 83 to release the charge stored inside the liquid crystal panel.

[0044] It should be noted that multiple representations in this disclosure are at least two.

[0045] In this embodiment, during power-off, when the Source IC detects that the voltages of VDDA and VDDD have dropped below the corresponding set threshold voltage, it initiates a power-off action. At this time, the third switch module 83 is first turned on to short-circuit the Sout outputs together for charge sharing. Simultaneously, the second switch module 82 is turned on to short-circuit the Sout output with Vcom, ensuring that Sout and Vcom maintain the same voltage immediately. Then, the first switch module 81 is turned on to simultaneously discharge Sout and Vcom to ground (GND). Within the LCD panel, when there is no voltage difference between Sout and Vcom, they discharge synchronously to ground, preventing the LCD from flipping and thus avoiding any visible screen flickering, thereby preventing the display from exhibiting flickering issues.

[0046] The following is combined Figure 6 The specific circuits of each module in the liquid crystal panel discharge circuit of the present disclosure embodiment are described.

[0047] like Figure 6 As shown, the first switching module 81 includes a first resistor R1 and at least one first switching transistor Q1. The first end of the first resistor R1 serves as the first terminal of the first switching module 81. The first terminals of each first switching transistor Q1 are connected to the second terminal of the first resistor R1, and the second terminals of each first switching transistor Q1 are connected to serve as the second terminal of the first switching module 81. The control terminals of each first switching transistor Q1 are connected to serve as the third terminal of the first switching module 81.

[0048] In one embodiment of this disclosure, the number of at least one first switch transistor Q1 is in the range of [3, 6], so that when any one of the multiple first switch transistors Q1 is damaged, it will not affect the operation of the discharge circuit.

[0049] like Figure 6 As shown, the second switch module 82 includes a second resistor R2 and a second switch transistor Q2. The first end of the second resistor R2 serves as the first end of the second switch module 82. The first end of the second switch transistor Q2 is connected to the second end of the second resistor R2, and the second end of the second switch transistor Q2 serves as the second end of the second switch module 82. The control end of the second switch transistor Q2 serves as the third end of the second switch module 82.

[0050] In one embodiment of this disclosure, the width of the trace between the first end of the second resistor R2 and the reference voltage signal end is widened, such as the value range being [18μm, 22μm], to protect the inside of the Source IC, prevent ESD risks introduced by Vcom, and prevent the circuit from burning out when the current through the second resistor R2 is overloaded.

[0051] like Figure 6 As shown, the third switch module 83 includes a first switch unit 831 and a second switch unit 832. The first end of the first switch unit 831 serves as the first end of the third switch module 83, and the control end of the first switch unit 831 serves as the third end of the third switch module 83. The first end of the second switch unit 832 is connected to the second end of the first switch unit 831, each second end of the second switch unit 832 serves as a second end of the third switch module 83, and each control end of the second switch unit 832, when connected, serves as a fourth end of the third switch module 83.

[0052] like Figure 6 As shown, the first switching unit 831 includes: a third switching transistor Q3, the first end of the third switching transistor Q3 serving as the first end of the first switching unit 831, the second end of the third switching transistor Q3 serving as the second end of the first switching unit 831, and the control end of the third switching transistor Q3 serving as the third end of the first switching unit 831.

[0053] like Figure 6As shown, the second switching unit 832 includes: a plurality of fourth switching transistors Q4 and a plurality of third resistors R3. The first terminal of each fourth switching transistor Q4 is connected to serve as the first terminal of the second switching unit 832. The first terminal of each third resistor R3 is connected to the second terminal of the corresponding fourth switching transistor Q4, and the second terminal of each third resistor R3 serves as the second terminal of the second switching unit 832.

[0054] In one embodiment of this disclosure, the controller is used to determine the start-up and shutdown actions, and to control each of the first switch modules 81, each of the second switch modules 82 and each of the third switch modules 83 to release the stored charge inside the liquid crystal panel. This includes: controlling each of the fourth switch transistors Q4 to turn on, so that each display signal output terminal in each group is short-circuited; controlling the second switch transistors Q2 and the third switch transistors Q3 to turn on, so that the reference voltage signal terminal is short-circuited with each display signal output terminal in each group; and controlling the first switch transistor Q1 to turn on, so that the reference voltage signal terminal and each display signal output terminal are synchronously grounded, thereby releasing the stored charge inside the liquid crystal panel.

[0055] In this embodiment, when the power is off, the power-off action is initiated when the Source IC detects that AVDD and DVDD have dropped below the corresponding set threshold voltage. Figure 7 Is using Figure 6 The liquid crystal panel discharge circuit shown is a simplified circuit diagram of one circuit. Figure 8 This is a waveform diagram of the LCD panel losing power when the discharge circuit is added. After powering off, combined with... Figure 7 The controller first turns on all fourth switches Q4 to short-circuit the Sout outputs together for charge sharing. Then, it turns on all third switches Q3 and the second switch Q2 to short-circuit the Sout output with Vcom, ensuring that Sout and Vcom maintain the same voltage immediately. Figure 8 As shown, the output voltage of S[1] is 2V, the output voltage of S

[12] is 12V, and the output voltage of Sout after being shorted with Vcom is 7V. Then, all the first switching transistors Q1 are turned on so that Sout and Vcom discharge to ground GND simultaneously. In the LCD panel, when there is no voltage difference between Sout and Vcom, they discharge to ground synchronously, so the LCD will not flip and the flickering will not be visible, thus avoiding the problem of screen flickering.

[0056] Even if the resistance value of the second resistor R2 is greater than that of the third resistor R3, it can still ensure that Sout and Vcom discharge to ground (GND) simultaneously. Accelerating the discharge allows the residual charge inside the LCD panel to be quickly released to ground (GND), thus preventing polarization even with prolonged power-on / off cycles. The power-down speed of Sout and Vcom together can be reduced from 10ms to 2ms. Figure 9As shown.

[0057] It should be noted that the first switch Q1, the second switch Q2, the third switch Q3 and the fourth switch Q4 in the embodiments of this disclosure can be controllable switches such as transistors, MOS (Metal-Oxide-Semiconductor Field-Effect Transistors), etc., and are not specifically limited in this disclosure. Figure 7 In the figure, C1 is the parasitic capacitance between Sout and R3, and C2 is the parasitic capacitance between Vcom and R1 and R2, which are connected in parallel.

[0058] In summary, the liquid crystal panel discharge circuit of this embodiment includes: a plurality of first switching modules, each with a first terminal connected to a reference voltage signal terminal and a second terminal grounded; a plurality of second switching modules, each with a first terminal connected to the first terminal of a corresponding first switching module; a plurality of third switching modules, each with a first terminal connected to the second terminal of a corresponding second switching module and a second terminal of each third switching module connected to a display signal output terminal in a corresponding group; and a controller connected to the third terminals of each of the first, second, and third switching modules and their fourth terminals. The controller is used to determine the start-up and shutdown actions and control each of the first, second, and third switching modules to release the charge stored inside the liquid crystal panel. Therefore, when the start-up and shutdown actions are determined, this circuit can, through the control of each of the first, second, and third switching modules, ensure synchronous discharge to ground when there is no voltage difference between the reference voltage signal terminal and the display signal output terminal, thus avoiding screen flickering.

[0059] Figure 10 This is a flowchart of a discharge method for a liquid crystal panel discharge circuit according to an embodiment of the present disclosure.

[0060] like Figure 10 As shown, the discharge method of the liquid crystal panel discharge circuit in this embodiment includes:

[0061] S101, confirm the start of the shutdown action.

[0062] S102 controls each of the first switch modules, each of the second switch modules and each of the third switch modules to release the stored charge inside the LCD panel.

[0063] In one embodiment of this disclosure, controlling each first switch module, each second switch module, and each third switch module to release the stored charge inside the liquid crystal panel includes:

[0064] Control each fourth switch to turn on, so that the display signal output terminals in each group are short-circuited;

[0065] The second and third switching transistors are turned on to short-circuit the reference voltage signal terminal with the display signal output terminal in each group.

[0066] The first switch is turned on to synchronously ground the reference voltage signal terminal and each display signal output terminal, thereby releasing the charge stored inside the LCD panel.

[0067] It should be noted that for details not disclosed in the discharge method of the liquid crystal panel discharge circuit in the embodiments of this disclosure, please refer to the details disclosed in the liquid crystal panel discharge circuit of the embodiments of this disclosure, which will not be repeated here.

[0068] In summary, the discharge method of the liquid crystal panel discharge circuit of this disclosure determines the start-up and shutdown actions and controls each of the first, second, and third switch modules to release the stored charge inside the liquid crystal panel. Therefore, this method, by controlling each of the first, second, and third switch modules when the start-up and shutdown actions are determined, ensures synchronous discharge to ground when there is no voltage difference between the reference voltage signal terminal and the display signal output terminal, thus avoiding screen flickering.

[0069] Based on the above embodiments, this disclosure also proposes a display chip that includes the above-described liquid crystal panel discharge circuit.

[0070] The display chip in this embodiment of the present disclosure, through the above-described liquid crystal panel discharge circuit, can control each of the first switch modules, each of the second switch modules and each of the third switch modules to discharge synchronously to ground when there is no voltage difference between the reference voltage signal terminal and the display signal output terminal, thereby avoiding the problem of screen flickering.

[0071] Based on the above embodiments, this disclosure also proposes an electronic device that includes the above-described display chip.

[0072] Among them, electronic devices can be televisions, computers, mobile phones, etc.

[0073] The electronic device of this disclosure embodiment, through the above-described display chip, can control each of the first switch modules, each of the second switch modules and each of the third switch modules to enable synchronous discharge to ground when there is no voltage difference between the reference voltage signal terminal and the display signal output terminal, thereby avoiding the problem of screen flickering.

[0074] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this disclosure. 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.

[0075] 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this disclosure, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0076] Any process or method description in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or more executable instructions for implementing custom logic functions or processes, and the scope of preferred embodiments of this disclosure includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order depending on the functions involved, as will be understood by those skilled in the art to which embodiments of this disclosure pertain.

[0077] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (such as a computer-based system, a processor-included system, or other system that can fetch and execute instructions from, an instruction execution system, apparatus, or device). For the purposes of this specification, "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transmit programs for use by, or in conjunction with, an instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of computer-readable media include: an electrical connection having one or more wires (electronic device), a portable computer disk drive (magnetic device), random access memory (RAM), read-only memory (ROM), erasable and editable read-only memory (EPROM or flash memory), fiber optic devices, and portable optical disc read-only memory (CDROM). Furthermore, computer-readable media can even be paper or other suitable media on which programs can be printed, because programs can be obtained electronically, for example, by optically scanning the paper or other media, followed by editing, interpreting, or otherwise processing as necessary, and then stored in computer memory.

[0078] It should be understood that various parts of this disclosure can be implemented using hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented using software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware as in another embodiment, it can be implemented using any one or a combination of the following techniques known in the art: discrete logic circuits having logic gates for implementing logical functions on data signals, application-specific integrated circuits (ASICs) having suitable combinational logic gates, programmable gate arrays (PGAs), field-programmable gate arrays (FPGAs), etc.

[0079] Those skilled in the art will understand that all or part of the steps of the methods described in the above embodiments can be implemented by a program instructing related hardware, and the program can be stored in a computer-readable storage medium. When executed, the program includes one or a combination of the steps of the method embodiments.

[0080] Furthermore, the functional units in the various embodiments of this disclosure can be integrated into a processing module, or each unit can exist physically separately, or two or more units can be integrated into a module. The integrated module can be implemented in hardware or as a software functional module. If the integrated module is implemented as a software functional module and sold or used as an independent product, it can also be stored in a computer-readable storage medium.

[0081] The storage medium mentioned above can be a read-only memory, a disk, or an optical disk, etc. Although embodiments of the present disclosure have been shown and described above, it is to be understood that the above embodiments are exemplary and should not be construed as limiting the present disclosure. Those skilled in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present disclosure.

Claims

1. A discharge circuit for a liquid crystal panel, characterized in that, include: Multiple first switch modules, each first switch module has its first terminal connected to a reference voltage signal terminal, and its second terminal grounded; Multiple second switch modules, wherein the first end of each second switch module is connected to the first end of the corresponding first switch module; Multiple third switch modules, the first end of each third switch module is connected to the second end of the corresponding second switch module, and each second end of each third switch module is connected to each display signal output terminal in the corresponding group; The controller is connected to the third terminal of each of the first switch modules, the third terminal of each of the second switch modules, the third terminal of each of the third switch modules, and the fourth terminal of each of the third switch modules. The controller is used to determine the start-up and shutdown actions and control each of the first switch modules, the second switch modules, and the third switch modules to release the stored charge inside the liquid crystal panel. The third switch module includes: The first switch unit has a first end that serves as the first end of the third switch module, and the control end of the first switch unit serves as the third end of the third switch module. The second switch unit has a first end connected to the second end of the first switch unit. Each second end of the second switch unit serves as a second end of the third switch module. Each control end of the second switch unit is connected and serves as a fourth end of the third switch module.

2. The discharge circuit as described in claim 1, characterized in that, The first switch module includes: The first resistor, with its first end serving as the first end of the first switch module; At least one first switching transistor is provided. The first end of each first switching transistor is connected to the second end of the first resistor. The second end of each first switching transistor is connected to serve as the second end of the first switching module. The control end of each first switching transistor is connected to serve as the third end of the first switching module.

3. The discharge circuit as described in claim 1, characterized in that, The second switch module includes: The second resistor, the first end of which serves as the first end of the second switch module; The second switch has its first end connected to the second end of the second resistor. The second end of the second switch serves as the second end of the second switch module, and the control end of the second switch serves as the third end of the second switch module.

4. The discharge circuit as described in claim 3, characterized in that, The width of the trace between the first end of the second resistor and the reference voltage signal end is in the range of [18μm, 22μm].

5. The discharge circuit as described in claim 1, characterized in that, The first switching unit includes: The third switch transistor has its first end serving as the first end of the first switch unit, its second end serving as the second end of the first switch unit, and its control end serving as the third end of the first switch unit.

6. The discharge circuit as described in claim 1, characterized in that, The second switching unit includes: Multiple fourth switching transistors are connected together to serve as the first end of the second switching unit. Multiple third resistors are provided, with the first end of each third resistor connected to the second end of the corresponding fourth switch transistor, and the second end of each third resistor serving as the second end of the second switch unit.

7. The discharge circuit as described in claim 1, characterized in that, The controller is used to determine the start-up and shutdown actions, and to control each of the first switch modules, each of the second switch modules, and each of the third switch modules to release the stored charge inside the liquid crystal panel, including: Control each fourth switch to turn on, so that the display signal output terminals in each group are short-circuited; The second and third switching transistors are turned on to short-circuit the reference voltage signal terminal with each of the display signal output terminals in each group. The first switch is turned on to synchronously ground the reference voltage signal terminal and each of the display signal output terminals, thereby releasing the charge stored inside the liquid crystal panel.

8. A discharge method based on the liquid crystal panel discharge circuit as described in any one of claims 1-7, characterized in that, Includes the following steps: Confirm the start and shutdown actions; Each of the first switch module, each of the second switch module, and each of the third switch modules is controlled to release the stored charge inside the liquid crystal panel.

9. The discharge method according to claim 8, characterized in that, Controlling each of the first switch modules, each of the second switch modules, and each of the third switch modules to release the stored charge inside the liquid crystal panel includes: Control each fourth switch to turn on, so that the display signal output terminals in each group are short-circuited; The second and third switching transistors are turned on to short-circuit the reference voltage signal terminal with each of the display signal output terminals in each group. The first switch is turned on to synchronously ground the reference voltage signal terminal and each of the display signal output terminals, thereby releasing the charge stored inside the liquid crystal panel.

10. A display chip, characterized in that, Includes the liquid crystal panel discharge circuit as described in any one of claims 1-7.

11. An electronic device, characterized in that, Includes the display chip as described in claim 10.

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