Driving circuit, driving method, and display device

Abstract

The application discloses a driving circuit, a driving method and a display device, which comprise a first signal identification module, a first signal comparison module and a path selection module which are sequentially connected, an abnormal signal release end and a normal signal output end are connected with the path selection module, and a display panel is connected with the normal signal output end; the first signal identification module is used for identifying the type of a signal and outputting a signal mark; the first signal comparison module is used for judging whether the size of the signal exceeds a preset threshold value and outputting a control command; the control command drives the path selection module to control the on-off between the first signal comparison module and the abnormal signal release end; the control command also drives the path selection module to control the on-off between the first signal comparison module and the normal signal output end, and the abnormal signal release end is used for releasing the abnormal signal to the ground. Through the above design, the service life of the display panel is improved, and the watching experience of a user is not affected.

Description

Technical Field

[0001] This application relates to the field of display technology, and in particular to a driving circuit, driving method and display device. Background Technology

[0002] The Gate Driver on Array (GOA) signal is an essential input signal for the display panel. In addition to ensuring that the timing of the input to the display panel meets the product requirements, its own protection measures are also very important, such as overvoltage and overcurrent protection. If a fault occurs accidentally inside the display panel or at the output of the integrated circuit, it will inevitably cause a large current or voltage, which may lead to the product burning out. Therefore, the overcurrent protection settings of the GOA signal must be perfect.

[0003] Current solutions protect the display panel by shutting down the power chip when dealing with overvoltage or overcurrent. However, in cases of accidental overcurrent or overvoltage, directly shutting down the power chip would negatively impact the user's viewing experience. Summary of the Invention

[0004] The purpose of this application is to provide a driving circuit, driving method, and display device to improve the service life of the display panel without affecting the user's viewing experience.

[0005] This application discloses a driving circuit, which is connected to the display panel and the control circuit board respectively. The driving circuit includes: a first signal recognition module, a first signal comparison module, a path selection module, an abnormal signal release terminal and a normal signal output terminal.

[0006] The first signal recognition module is used to connect to the control circuit board. The first signal recognition module, the first signal comparison module, and the path selection module are connected in sequence. The abnormal signal release terminal is connected to the path selection module. The normal signal output terminal is connected to the path selection module. The normal signal output terminal is used to connect to the display panel.

[0007] The first signal recognition module is used to identify the type of signal and output a signal identifier; the first signal comparison module is used to determine whether the signal size exceeds a preset threshold and output a control command; the control command drives the path selection module to control the connection and disconnection between the first signal comparison module and the abnormal signal release terminal;

[0008] The control command drives the path selection module to also control the connection and disconnection between the first signal comparison module and the normal signal output terminal, and the abnormal signal release terminal is used to release the abnormal signal to ground.

[0009] Optionally, the driving circuit further includes a second signal recognition module and a second signal comparison module;

[0010] The signal acquisition terminal of the second signal recognition module is connected to the normal signal output terminal. One end of the second signal comparison module is connected to the second signal recognition module, and the other end is connected to the path selection module. The second signal recognition module is used to identify the type of signal and output a signal identifier. The second signal comparison module is used to determine whether the signal size exceeds a preset threshold and output a control command.

[0011] The control command issued by the second signal comparison module drives the path selection module to control the connection and disconnection between the normal signal output terminal and the abnormal signal release terminal.

[0012] Optionally, the driving circuit further includes a threshold signal generation module, which is connected to the first signal comparison module and also to the second signal comparison module. The threshold signal generation module generates a preset threshold signal for comparing whether the signal exceeds the preset threshold.

[0013] Optionally, the first signal comparison module is further configured to issue a recording instruction, and the driving circuit further includes a recording module. The recording module is connected to the first signal comparison module and the flash memory respectively. The recording module is configured to receive the recording instruction issued by the first signal comparison module and store the signal type and size in the flash memory.

[0014] Optionally, the driving circuit further includes a power-down module, one end of which is connected to the first signal comparison module and the other end of which is connected to the power chip; the power-down module is used to monitor the recording command issued by the first signal comparison module, and when the recording command reaches a preset number of times within a preset time, it controls the power chip to stop working.

[0015] Optionally, the path selection module includes a control command input terminal, a signal input terminal, a first signal output terminal, a second signal output terminal, an active switch, and a resistor;

[0016] The first signal comparison module is connected to both the control command input terminal and the signal input terminal. The control command input terminal is connected to the gate of the active switch, the signal input terminal is connected to the source of the active switch, the first signal output terminal is connected to the drain of the active switch, the abnormal signal release terminal is connected to the first signal output terminal, the second signal output terminal is connected to the source of the active switch, the normal signal output terminal is connected to the second signal output terminal, and the two ends of the resistor are connected to the control command input terminal and the first signal output terminal, respectively.

[0017] This application also discloses a driving method, the driving method comprising the steps of:

[0018] The first signal recognition module receives signals sent from the control circuit board to the display panel, identifies the signals, and outputs the corresponding signal identifiers.

[0019] The first signal comparison module receives the signal identifier and determines whether the signal exceeds a preset threshold based on the signal identifier. If the signal exceeds the preset threshold, a first control command is generated and output; if the signal does not exceed the preset threshold, a second control command is generated and output.

[0020] When the path selection module receives the first control command and signal, it controls the connection between the first signal comparison module and the abnormal signal release terminal, and sends the signal to the abnormal signal release terminal for grounding release; when the path selection module receives the second control command and signal, it controls the connection between the first signal comparison module and the normal signal output terminal, and sends the signal to the normal signal output terminal.

[0021] Optionally, the driving method further includes the step of:

[0022] The second signal recognition module collects the signals flowing back from the display panel to the control circuit board, identifies the signals, and outputs the corresponding signal identifiers;

[0023] The second signal comparison module receives the signal identifier and determines whether the signal exceeds the preset threshold based on the signal identifier. When the signal exceeds the preset threshold, a first control command is generated and output; when the signal does not exceed the preset threshold, a second control command is generated and output.

[0024] When the path selection module receives the first control command and signal, it controls the connection between the second signal comparison module and the abnormal signal release terminal, and transmits the signal to the abnormal signal release terminal for grounding release.

[0025] Optionally, the step of the first signal comparison module receiving a signal identifier, determining whether the signal exceeds a preset threshold based on the signal identifier, generating and outputting a first control command when the signal exceeds the preset threshold, and generating and outputting a second control command when the signal does not exceed the preset threshold further includes:

[0026] The first signal comparison module receives the signal identifier and determines whether the signal exceeds a preset threshold based on the signal identifier. When the signal exceeds the preset threshold, it generates and outputs a first control command and a record instruction. When the signal does not exceed the preset threshold, it generates and outputs a second control command.

[0027] The recording module receives a recording instruction. When the recording module receives a recording instruction, it stores the type and magnitude of the signal into the flash memory according to the recording instruction.

[0028] This application also discloses a display device, which includes a display panel, a control circuit board, and the aforementioned driving circuit, wherein the two ends of the driving circuit are respectively connected between the display panel and the control circuit board.

[0029] Compared to existing control circuit boards and display panel signal transmission schemes, this application adds a driving circuit. A first signal comparison module determines whether the signal magnitude exceeds a preset threshold. When the signal exceeds the threshold, the first signal comparison module outputs a control command. The driving path selection module controls the conduction between the first signal comparison module and the abnormal signal release terminal to release signals exceeding the threshold to ground. This prevents signals exceeding the preset threshold from entering the display panel and causing internal circuit burnout, thereby improving the lifespan of the display panel. Furthermore, when the driving circuit detects a signal exceeding the preset threshold, it releases the signal without directly shutting down the power chip, thus not affecting the user's viewing experience. Attached Figure Description

[0030] The accompanying drawings, which form part of the specification, are used to provide a further understanding of the embodiments of this application and illustrate the implementation methods of this application, together with the textual description, to explain the principles of this application. Obviously, the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any creative effort. In the drawings:

[0031] Figure 1 This is a schematic diagram of a display device according to an embodiment of this application;

[0032] Figure 2 This is a schematic diagram of a driving circuit according to an embodiment of this application;

[0033] Figure 3 This is a schematic diagram of a path selection module according to an embodiment of this application;

[0034] Figure 4 This is a schematic diagram of a driving method according to an embodiment of this application.

[0035] Among them, 10 is a display device; 20 is a display panel; 30 is a control circuit board; 40 is a drive circuit; 100 is a first signal recognition module; 110 is a first signal comparison module; 120 is a path selection module; 130 is an abnormal signal release terminal; 140 is a normal signal output terminal; 150 is a second signal recognition module; 160 is a second signal comparison module; 170 is a threshold signal generation module; 180 is a recording module; 190 is a power-down module; 210 is a flash memory; 220 is a power chip; 310 is a control command input terminal; 320 is a signal input terminal; 330 is a first signal output terminal; 340 is a second signal output terminal; 350 is an active switch; and 360 is a resistor. Detailed Implementation

[0036] It should be understood that the terminology, specific structural and functional details used herein are merely for describing particular embodiments and are representative. However, this application may be implemented in many alternative forms and should not be construed as being limited to the embodiments set forth herein.

[0037] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating relative importance or implying the number of technical features indicated. Therefore, unless otherwise stated, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature; "multiple" means two or more. The term "comprising" and any variations thereof mean non-exclusive inclusion, where one or more other features, integers, steps, operations, units, components, and / or combinations thereof may be present or added.

[0038] In addition, terms such as “center,” “horizontal,” “up,” “down,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer” that indicate orientation or positional relationship are based on the orientation or relative positional relationship shown in the accompanying drawings. They are only for the purpose of simplifying the description of this application and do not indicate that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0039] Furthermore, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0040] The present application will now be described in detail with reference to the accompanying drawings and optional embodiments.

[0041] Figure 1 This is a schematic diagram of a display device according to an embodiment of this application, as shown below. Figure 1 As shown, this application discloses a display device 10, which includes a display panel 20, a control circuit board 30, and a driving circuit 40. The two ends of the driving circuit 40 are respectively connected between the display panel 20 and the control circuit board 30.

[0042] The driving circuit 40 can be integrated on the control circuit board 30 or on the display panel 20, without limitation. Furthermore, the technical solution of this application can be widely used in various display panels 20, such as TN (Twisted Nematic) display panels 20, IPS (In-Plane Switching) display panels 20, VA (Vertical Alignment) display panels 20, and MVA (Multi-Domain Vertical Alignment) display panels 20. Of course, it can also be other types of display panels 20, such as OLED (Organic Light-Emitting Diode) display panels 20, all of which are applicable to the above solution.

[0043] This application also discloses a driving circuit 40, which can be used in the display device 10 described above. Regarding the driving circuit 40, this application provides the following design:

[0044] Figure 2 This is a schematic diagram of a driving circuit according to an embodiment of this application, as shown below. Figure 2 As shown, this application discloses a driving circuit 40, which is connected to the display panel 20 and the control circuit board 30 respectively. The driving circuit 40 includes: a first signal recognition module 100, a first signal comparison module 110, a path selection module 120, an abnormal signal release terminal 130, and a normal signal output terminal 140.

[0045] The first signal recognition module 100 is used to connect to the control circuit board 30. The first signal recognition module 100, the first signal comparison module 110 and the path selection module 120 are connected in sequence. The abnormal signal release terminal 130 is connected to the path selection module 120. The normal signal output terminal 140 is connected to the path selection module 120. The normal signal output terminal 140 is used to connect to the display panel 20.

[0046] The first signal recognition module 100 is used to identify the type of signal and output a signal identifier; the first signal comparison module 110 is used to determine whether the signal size exceeds a preset threshold and output a control command; the control command drives the path selection module 120 to control the connection and disconnection between the first signal comparison module 110 and the abnormal signal release terminal 130.

[0047] The control command drives the path selection module 120 to control the connection and disconnection between the first signal comparison module 110 and the normal signal output terminal 140, and the abnormal signal release terminal 130 is used to release the abnormal signal to ground.

[0048] For example, the first signal recognition module 100 receives signals sent from the control circuit board 30 to the display panel 20, identifies the signals, and outputs corresponding signal identifiers. Then, the first signal comparison module receives the signal identifiers and determines whether the signal exceeds a preset threshold. If the signal exceeds the preset threshold, a first control command is generated and output; if the signal does not exceed the preset threshold, a second control command is generated and output. When the path selection module 120 receives the first control command and the signal, it controls the connection between the first signal comparison module 110 and the abnormal signal release terminal 130, transmitting the signal to the abnormal signal release terminal 130 for grounding. When the path selection module 120 receives the second control command and the signal, it controls the connection between the first signal comparison module 110 and the normal signal output terminal 140, transmitting the signal to the normal signal output terminal 140. This achieves the goal of releasing signals exceeding the preset threshold to ground and transmitting signals below the preset threshold into the display panel 20.

[0049] The preset threshold can be pre-set inside the first signal comparison module 110, or a threshold signal generation module 170 can be set to generate it at any time. Specifically, the driving circuit 40 also includes a threshold signal generation module 170, which is connected to the first signal comparison module 110 and also connected to the second signal comparison module 160. The threshold signal generation module 170 generates a preset threshold signal to compare whether the signal exceeds the preset threshold.

[0050] Compared to the existing signal transmission scheme between the control circuit board 30 and the display panel 20, this application adds a driving circuit 40 to prevent signals exceeding a preset threshold from entering the display panel 20 and causing internal circuit burnout, thereby improving the lifespan of the display panel 20. Furthermore, when the driving circuit 40 detects a signal exceeding the preset threshold, it releases the signal without directly shutting down the power chip 220, thus not affecting the user's viewing experience.

[0051] The drive circuit 40 is directly triggered by the power chip 220 on the control circuit board 30, that is, the drive circuit 40 is started when the power is turned on to avoid the occurrence of a downtime.

[0052] If a short circuit or other situation occurs inside the display panel 20, a large voltage signal will flow back from the display panel 20 to the control circuit board 30. Therefore, in order to prevent the control circuit board 30 from being burned out when the large voltage signal flows back, the driving circuit 40 of this application also includes a second signal recognition module 150 and a second signal comparison module 160.

[0053] The signal acquisition terminal of the second signal identification module 150 is connected to the normal signal output terminal 140. One end of the second signal comparison module 160 is connected to the second signal identification module 150, and the other end is connected to the path selection module 120. The second signal identification module 150 is used to identify the type of signal and output a signal identifier. The second signal comparison module 160 is used to determine whether the signal size exceeds a preset threshold and output a control command. The control command issued by the second signal comparison module 160 drives the path selection module 120 to control the connection and disconnection between the normal signal output terminal 140 and the abnormal signal release terminal 130.

[0054] The threshold signal generation module 170 is also connected to the second signal comparison module 160. The threshold signal generation module 170 generates a preset threshold signal to compare whether the signal exceeds the preset threshold.

[0055] For example, the second signal recognition module 150 collects the signal flowing back from the display panel 20 to the control circuit board 30, identifies the signal, and outputs a corresponding signal identifier. Then, the second signal comparison module 160 receives the signal identifier and determines whether the signal exceeds a preset threshold. If the signal exceeds the preset threshold, a first control command is generated and output; if the signal does not exceed the preset threshold, a second control command is generated and output. When the path selection module 120 receives the first control command and the signal, it controls the connection between the second signal comparison module 160 and the abnormal signal release terminal 130, transmitting the signal to the abnormal signal release terminal 130 for grounding release. This prevents the backflow signal from affecting the control circuit board 30.

[0056] Furthermore, to facilitate testing by staff, this application also records signals that exceed a preset threshold. Specifically, the first signal comparison module 110 is also used to issue a recording instruction, and the driving circuit 40 further includes a recording module 180. The recording module 180 is connected to the first signal comparison module 110 and the flash memory 210 respectively. The recording module 180 is used to receive the recording instruction issued by the first signal comparison module 110 and store the signal type and magnitude in the flash memory 210.

[0057] When the signal compared by the first signal comparison module 110 is greater than a preset threshold, a recording command will be issued. The recording command will be transmitted to the recording module 180. The recording module 180 can be set in the Tcon chip of the control circuit board 30 or set separately. After receiving the recording command, the recording module 180 will record the magnitude and type of the signal in the flash memory 210. The flash memory 210 can be newly added or it can be built into the control circuit board 30. There is no limitation here. The recording command includes the instruction to trigger the recording, the magnitude of the signal and the path of the signal. The type of signal can be inferred from the path of the signal.

[0058] Normally, when displaying images on the display panel 20, the signal will only occasionally exceed the preset threshold. However, if the signal continuously exceeds the preset threshold, it indicates that there is an open circuit or other issues on the control circuit board 30. In this case, the display panel 20 cannot display normally. Therefore, this application will turn off the power chip 220 in this situation, as follows:

[0059] The driving circuit 40 further includes a power-down module 190, one end of which is connected to the first signal comparison module 110 and the other end of which is connected to the power chip 220. The power-down module 190 is used to monitor the recording command issued by the first signal comparison module 110. When the recording command reaches a preset number of times within a preset time, the power chip 220 is controlled to turn off.

[0060] Furthermore, the second signal comparison module 160 can also issue a recording instruction. Specifically, the driving circuit 40 further includes a recording module 180, which is connected to the second signal comparison module 160 and the flash memory 210 respectively. The recording module 180 is used to receive the recording instruction issued by the second signal comparison module 160 and store the signal type and size in the flash memory 210.

[0061] When the backflow signal in the second signal comparison module 160 is greater than a preset threshold, a recording command will be issued. The recording command will be transmitted to the recording module 180. The recording module 180 can be set in the Tcon chip of the control circuit board 30 or set separately. After receiving the recording command, the recording module 180 will record the magnitude and type of the backflow signal in the flash memory 210. The flash memory 210 can be newly added or it can be built into the control circuit board 30. There is no limitation here. The recording command includes the instruction to trigger the recording, the magnitude of the signal and the path of the signal. The type of signal can be inferred from the path of the signal.

[0062] Normally, when displaying images on the display panel 20, the signal will only occasionally exceed the preset threshold. However, if the signal continuously exceeds the preset threshold, it indicates that there is an open circuit or other issues on the control circuit board 30. In this case, the display panel 20 cannot display normally. Therefore, this application will shut down the power chip 220 to stop its operation in this situation, as follows:

[0063] The driving circuit 40 further includes a power-down module 190, one end of which is connected to the second signal comparison module 160 and the other end of which is connected to the power chip 220. The power-down module 190 is used to monitor the recording command issued by the second signal comparison module 160. When the recording command reaches a preset number of times within a preset time, the power chip 220 is controlled to turn off.

[0064] For example, if three recording commands occur within three consecutive frames, it indicates that the signal exceeds the preset threshold three times. If the counter and timer set in the power-down module 190 detect this situation, the power chip 220 will stop working to prevent it from continuing to work after the problem occurs, which could damage other circuit structures on the display panel 20 or the control circuit board 30.

[0065] Furthermore, the recording instruction issued by the first signal comparison module 110 is the first recording instruction, and the recording instruction issued by the second signal comparison module 160 is the second recording instruction. The power-down module 190 is also used to synchronously monitor the first recording instruction and the second recording instruction. When the first recording instruction and the second recording instruction appear consecutively within a preset time, the power chip 220 is controlled to turn off.

[0066] For example, if the first recording instruction, the second recording instruction, and the first recording instruction appear sequentially within three consecutive frames, it indicates that three signals are successively greater than a preset threshold: the signal sent from the control circuit board 30 to the display panel 20 is greater than the preset threshold, the signal flowing back from the display panel 20 to the control circuit board 30 is greater than the preset threshold, and the signal sent from the control circuit board 30 to the display panel 20 is greater than the preset threshold. Alternatively, if the second recording instruction, the first recording instruction, and the second recording instruction appear sequentially within three consecutive frames, it indicates that three signals are successively greater than the preset threshold: the signal flowing back from the display panel 20 to the control circuit board 30 is greater than the preset threshold, the signal sent from the control circuit board 30 to the display panel 20 is greater than the preset threshold, and the signal flowing back from the display panel 20 to the control circuit board 30 is greater than the preset threshold. In this case, the power-down module 190 detects the above two situations and controls the power chip 220 to stop working to prevent it from continuing to work after a problem occurs, which could damage other circuit structures on the display panel 20 or the control circuit board 30.

[0067] Figure 3 This is a schematic diagram of a path selection module according to an embodiment of this application, as shown below. Figure 3 As shown, the path selection module 120 includes a control command input terminal 310, a signal input terminal 320, a first signal output terminal 330, a second signal output terminal 340, an active switch 350, and a resistor 360.

[0068] The first signal comparison module 110 is connected to both the control command input terminal 310 and the signal input terminal 320. The control command input terminal 310 is connected to the gate of the active switch 350, and the signal input terminal 320 is connected to the source of the active switch 350. The first signal output terminal 330 is connected to the drain of the active switch 350. The abnormal signal release terminal 130 is connected to the first signal output terminal 330. The second signal output terminal 340 is connected to the source of the active switch 350. The normal signal output terminal 140 is connected to the second signal output terminal 340. The two ends of the resistor 360 are connected to the control command input terminal 310 and the first signal output terminal 330, respectively.

[0069] The control command can control the connection and disconnection between the signal input terminal 320 and the first signal output terminal 330 by opening or closing the active switch 350. For example, when the control command opens the active switch 350, the signal input terminal 320 and the first signal output terminal 330 are connected, and the signal will be output to ground from the first signal output terminal 330. When the control command closes the active switch 350, the signal input terminal 320 and the first signal output terminal 330 are disconnected, and the signal can only be output to one side of the display panel 20 from the second signal output terminal 340.

[0070] Figure 4 This is a schematic diagram of a driving method according to an embodiment of this application, as shown below. Figure 4 As shown, this application also discloses a driving method for the driving circuit 40 described above, the driving method comprising the steps of:

[0071] S1: The first signal recognition module receives signals sent from the control circuit board to the display panel, identifies the signals, and outputs the corresponding signal identifier;

[0072] S2: The first signal comparison module receives the signal identifier and determines whether the signal exceeds the preset threshold based on the signal identifier. If the signal exceeds the preset threshold, a first control command is generated and output. If the signal does not exceed the preset threshold, a second control command is generated and output.

[0073] S3: When the path selection module receives the first control command and signal, it controls the conduction between the first signal comparison module and the abnormal signal release terminal, and sends the signal to the abnormal signal release terminal for grounding release; when the path selection module receives the second control command and signal, it controls the conduction between the first signal comparison module and the normal signal output terminal, and sends the signal to the normal signal output terminal.

[0074] Compared to the existing signal transmission scheme between the control circuit board 30 and the display panel 20, this application adds a driving circuit 40 to prevent signals exceeding a preset threshold from entering the display panel 20 and causing internal circuit burnout, thereby improving the lifespan of the display panel 20. Furthermore, when the driving circuit 40 detects a signal exceeding the preset threshold, it releases the signal without directly shutting down the power chip 220, thus not affecting the user's viewing experience.

[0075] The driving method further includes the following steps:

[0076] S4: The second signal recognition module collects the signal flowing back from the display panel to the control circuit board, identifies the signal, and outputs the corresponding signal identifier;

[0077] S5: The second signal comparison module receives the signal identifier and determines whether the signal exceeds the preset threshold based on the signal identifier. When the signal exceeds the preset threshold, a first control command is generated and output; when the signal does not exceed the preset threshold, a second control command is generated and output.

[0078] S6: When the path selection module receives the first control command and signal, it controls the connection between the second signal comparison module and the abnormal signal release terminal, and sends the signal to the abnormal signal release terminal for grounding release.

[0079] This prevents the signal from flowing back from the display panel 20 to the control circuit board 30 from affecting the control circuit board 30.

[0080] In step S2: The first signal comparison module receives a signal identifier and determines whether the signal exceeds a preset threshold based on the signal identifier. If the signal exceeds the preset threshold, a first control command is generated and output; if the signal does not exceed the preset threshold, a second control command is generated and output. This also includes:

[0081] S21: The first signal comparison module receives the signal identifier and determines whether the signal exceeds the preset threshold based on the signal identifier; when the signal exceeds the preset threshold, it generates and outputs the first control command and the recording instruction; when the signal does not exceed the preset threshold, it generates and outputs the second control command.

[0082] S22: The recording module receives a recording instruction. When the recording module receives a recording instruction, it stores the type and magnitude of the signal in the flash memory according to the recording instruction.

[0083] By storing the signal type and magnitude in the flash memory 210, staff can directly read the information in the flash memory 210 when they need to perform subsequent tests, and understand exactly where the problem occurred on the control circuit board 30 or the display panel 20, thus improving the convenience of testing.

[0084] It should be noted that the limitations on each step involved in this solution are not considered as limiting the order of steps, provided that they do not affect the implementation of the specific solution. The steps listed first can be executed first, later, or even simultaneously. As long as this solution can be implemented, it should be considered to fall within the scope of protection of this application.

[0085] It should be noted that the inventive concept of this application can form many embodiments, but due to the limited space of the application documents, they cannot all be listed. Therefore, without conflict, the embodiments described above or the technical features can be arbitrarily combined to form new embodiments. After the embodiments or technical features are combined, the original technical effect will be enhanced.

[0086] The above description, in conjunction with specific optional embodiments, provides a further detailed explanation of this application and should not be construed as limiting the specific implementation of this application to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of this application, and all such modifications or substitutions should be considered within the scope of protection of this application.

Claims

1. A driving circuit, wherein the driving circuit is connected to a display panel and a control circuit board respectively, characterized in that, The driving circuit includes: a first signal recognition module, a first signal comparison module, a path selection module, an abnormal signal release terminal, and a normal signal output terminal; The first signal recognition module is used to connect to the control circuit board. The first signal recognition module, the first signal comparison module, and the path selection module are connected in sequence. The abnormal signal release terminal is connected to the path selection module. The normal signal output terminal is connected to the path selection module. The normal signal output terminal is used to connect to the display panel. The first signal recognition module is used to identify the type of signal and output a signal identifier; the first signal comparison module is used to determine whether the signal size exceeds a preset threshold and output a control command; the control command drives the path selection module to control the connection and disconnection between the first signal comparison module and the abnormal signal release terminal; The control command also drives the path selection module to control the connection and disconnection between the first signal comparison module and the normal signal output terminal, and the abnormal signal release terminal is used to release the abnormal signal to ground. The driving circuit also includes a power-down module, one end of which is connected to the first signal comparison module and the other end of which is connected to the power chip. The power-down module is used to monitor the recording instructions issued by the first signal comparison module. When the recording instructions reach a preset number of times within a preset time, the power chip is controlled to stop working.

2. The driving circuit according to claim 1, characterized in that, The driving circuit further includes a second signal recognition module and a second signal comparison module; The signal acquisition terminal of the second signal recognition module is connected to the normal signal output terminal. One end of the second signal comparison module is connected to the second signal recognition module, and the other end is connected to the path selection module. The second signal recognition module is used to identify the type of signal and output a signal identifier. The second signal comparison module is used to determine whether the signal size exceeds a preset threshold and output a control command. The control command issued by the second signal comparison module drives the path selection module to control the connection and disconnection between the normal signal output terminal and the abnormal signal release terminal.

3. The driving circuit according to claim 2, characterized in that, The driving circuit further includes a threshold signal generation module, which is connected to the first signal comparison module and also to the second signal comparison module. The threshold signal generation module generates a preset threshold signal for comparing whether the signal exceeds the preset threshold.

4. The driving circuit according to claim 3, characterized in that, The first signal comparison module is also used to issue a recording command. The driving circuit also includes a recording module, which is connected to the first signal comparison module and the flash memory respectively. The recording module is used to receive the recording command issued by the first signal comparison module and store the signal type and size in the flash memory.

5. The driving circuit according to claim 1, characterized in that, The path selection module includes a control command input terminal, a signal input terminal, a first signal output terminal, a second signal output terminal, an active switch, and a resistor; The first signal comparison module is connected to both the control command input terminal and the signal input terminal. The control command input terminal is connected to the gate of the active switch, the signal input terminal is connected to the source of the active switch, the first signal output terminal is connected to the drain of the active switch, the abnormal signal release terminal is connected to the first signal output terminal, the second signal output terminal is connected to the source of the active switch, the normal signal output terminal is connected to the second signal output terminal, and the two ends of the resistor are connected to the control command input terminal and the first signal output terminal, respectively.

6. A driving method, characterized in that, The driving method is used in the driving circuit according to any one of claims 1-5, and the driving method includes the following steps: The first signal recognition module receives signals sent from the control circuit board to the display panel, identifies the signals, and outputs the corresponding signal identifiers. The first signal comparison module receives the signal identifier and determines whether the signal exceeds a preset threshold based on the signal identifier. If the signal exceeds the preset threshold, a first control command is generated and output; if the signal does not exceed the preset threshold, a second control command is generated and output. When the path selection module receives the first control command and signal, it controls the connection between the first signal comparison module and the abnormal signal release terminal, and sends the signal to the abnormal signal release terminal for grounding release; when the path selection module receives the second control command and signal, it controls the connection between the first signal comparison module and the normal signal output terminal, and sends the signal to the normal signal output terminal.

7. The driving method according to claim 6, characterized in that, The driving method further includes the following steps: The second signal recognition module collects the signals flowing back from the display panel to the control circuit board, identifies the signals, and outputs the corresponding signal identifiers; The second signal comparison module receives the signal identifier and determines whether the signal exceeds the preset threshold based on the signal identifier. When the signal exceeds the preset threshold, a first control command is generated and output; when the signal does not exceed the preset threshold, a second control command is generated and output. When the path selection module receives the first control command and signal, it controls the connection between the second signal comparison module and the abnormal signal release terminal, and transmits the signal to the abnormal signal release terminal for grounding release.

8. The driving method according to claim 6, characterized in that, The first signal comparison module receives a signal identifier, determines whether the signal exceeds a preset threshold based on the signal identifier, and generates and outputs a first control command when the signal exceeds the preset threshold, and generates and outputs a second control command when the signal does not exceed the preset threshold. The steps also include: The first signal comparison module receives the signal identifier and determines whether the signal exceeds a preset threshold based on the signal identifier. When the signal exceeds the preset threshold, it generates and outputs a first control command and a record instruction. When the signal does not exceed the preset threshold, it generates and outputs a second control command. The recording module receives a recording instruction. When the recording module receives a recording instruction, it stores the type and magnitude of the signal into the flash memory according to the recording instruction.

9. A display device, characterized in that, The display device includes a display panel, a control circuit board, and a driving circuit as described in any one of claims 1-5, wherein the two ends of the driving circuit are respectively connected between the display panel and the control circuit board.

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