CN115953987A - Display panel, overcurrent protection device and method thereof and electronic equipment - Google Patents

Abstract

The invention discloses a display panel and its overcurrent protection device, method and electronic equipment. The device includes a level conversion circuit, a gate drive circuit, a display drive circuit and a timing controller, wherein the level conversion circuit is used for When it is determined that the display panel has an overcurrent phenomenon, send a black screen trigger command to the timing controller; the timing controller is used to output the target grayscale information to the display drive circuit when receiving the black screen trigger command, and feed back the trigger result to the level conversion circuit; display The drive circuit is used to control the display panel to perform black screen display when receiving the target grayscale information; the level conversion circuit is also used to output a high-impedance state signal to the gate drive circuit when receiving the trigger result, so that the display panel keeps black screen display. The device can control the display panel to display a black screen when an overcurrent phenomenon occurs on the display panel, so that users will not see abnormal images such as blurred screens, thereby reducing user complaints and reducing the risk of product returns.

Description

Display panel and its overcurrent protection device, method and electronic equipment

technical field

The invention relates to the technical field of display panels, in particular to an overcurrent protection device for a display panel, a display panel, an electronic device, and an overcurrent protection method for a display panel.

Background technique

At present, the gate drive technology of large-size LCD (Liquid Crystal Display, liquid crystal display) display panel is mainly GOA (Gate On Array, gate array) architecture scheme, and TFT (Thin Film Transistor, thin film transistor) technology is mainly A-si technology and IGZO (Indium Gallium Zinc Oxide, Indium Gallium Zinc Oxide) technology. The GOA architecture is a technology that integrates the gate drive circuit on the glass by designing a TFT circuit on the glass. The advantage is that it does not require a gate IC (Integrated Circuit, integrated circuit), reduces costs, and improves panel integration. It is suitable for Narrow bezel products. Due to the relatively complex wiring of the gate drive circuit of the LCD panel using GOA technology, the occasional high current situation under abnormal conditions will also increase the heat generation in the GOA area. At the same time, the IGZO technology is more likely to cause high current conditions when the power is turned on due to the slow release of charges. .

In related technologies, in order to prevent safety problems such as screen burn-in caused by overheating of the GOA area of the display panel caused by a large current, a current protection function is added to the level conversion circuit. However, in the actual use process, after the current protection function is triggered due to the high current inside the panel or other abnormalities, the display panel will display abnormal images such as blurred screens. End customers found this problem when using it, and there were a large number of complaints and returns, which affected brand value and shipping plans.

Contents of the invention

The present invention aims to solve one of the technical problems in the related art at least to a certain extent. For this reason, the first object of the present invention is to provide an overcurrent protection device for a display panel, which can control the display panel to display a black screen when an overcurrent phenomenon occurs on the display panel, so that the user will not see abnormal phenomena such as blurred screens. , thereby reducing user complaints and reducing the risk of product returns.

The second objective of the present invention is to provide a display panel.

The third object of the present invention is to provide an electronic device.

The fourth objective of the present invention is to provide an overcurrent protection method for a display panel.

In order to achieve the above purpose, the embodiment of the first aspect of the present invention proposes an overcurrent protection device for a display panel, including a level conversion circuit, a gate drive circuit, a display drive circuit and a timing controller, wherein the level conversion circuit is used When it is determined that the display panel has an overcurrent phenomenon, the black screen trigger command is sent to the timing controller; the timing controller is used to output the target gray scale information to the display driving circuit when receiving the black screen trigger command, and feed back the trigger result to the level conversion circuit; The display drive circuit is used to control the display panel to perform black screen display when receiving the target grayscale information; the level conversion circuit is also used to output a high-impedance state signal to the gate drive circuit when the trigger result is received, so that the display panel remains black screen display .

According to the overcurrent protection device of the display panel in the embodiment of the present invention, the level conversion circuit sends a black screen trigger instruction to the timing controller when it is determined that the display panel has an overcurrent phenomenon, and the timing controller outputs the target gray scale when receiving the black screen trigger instruction The information is sent to the display drive circuit, and the trigger result is fed back to the level conversion circuit; when the display drive circuit receives the target gray scale information, the display panel is controlled to display a black screen; the level conversion circuit outputs a high-impedance signal to the grid when receiving the trigger result Pole drive circuit to keep the display panel black. Therefore, when the display panel has an overcurrent phenomenon, the device can control the display panel to display a black screen image, so that users will not see abnormal images such as blurred screens, thereby reducing user complaints and reducing the risk of product returns.

In addition, the overcurrent protection device for a display panel according to the above-mentioned embodiments of the present invention may also have the following additional technical features:

According to an embodiment of the present invention, the level conversion circuit is further used to determine that an overcurrent phenomenon occurs on the display panel when it is recognized that the overcurrent protection condition in the gate drive circuit is triggered.

According to an embodiment of the present invention, a communication connection is established between the level conversion circuit and the timing controller, so as to realize the sending of the black screen trigger instruction and the feedback of the trigger result.

According to an embodiment of the present invention, a communication connection is established between the level conversion circuit and the timing controller through the first communication port and the second communication port, wherein the level conversion circuit changes the level of the first communication port to make The timing controller receives the black screen trigger instruction; the timing controller changes the level of the second communication port so that the level conversion circuit receives the trigger result.

According to an embodiment of the present invention, the timing controller is further configured to change the level of the second communication port after outputting the target grayscale information to the display driving circuit in the current frame, and continuously output the target grayscale information to the display driving circuit in the next frame. level information.

According to an embodiment of the present invention, the target gray scale information is L0 display gray scale.

According to an embodiment of the present invention, the level shifting circuit is also used to send an instruction to restore normal display to the timing controller when it is determined that the overcurrent phenomenon of the display panel is resolved, and the timing controller outputs a normal gray when receiving the instruction to restore normal display. level information to the display drive circuit, and notify the level conversion circuit to output normal level signals to the gate drive circuit.

To achieve the above object, the embodiment of the second aspect of the present invention provides a display panel, including the above-mentioned overcurrent protection device for the display panel.

According to the display panel of the embodiment of the present invention, through the above-mentioned overcurrent protection device of the display panel, when the overcurrent phenomenon occurs on the display panel, the display panel can be controlled to display a black screen image, so that the user will not see abnormal images such as blurred screen, thereby Reduce user complaints and reduce the risk of product returns.

To achieve the above object, the embodiment of the third aspect of the present invention provides an electronic device, including the above display panel.

According to the electronic device of the embodiment of the present invention, the above-mentioned display panel can control the display panel to display a black screen when an overcurrent phenomenon occurs on the display panel, so that the user will not see abnormal images such as blurred screens, thereby reducing user complaints. Reduce the risk of product returns.

In order to achieve the above purpose, the embodiment of the third aspect of the present invention proposes an overcurrent protection method for a display panel. The display panel includes a level conversion circuit, a gate drive circuit, a display drive circuit and a timing controller, wherein the method includes: When it is determined that the display panel has an overcurrent phenomenon, the level conversion circuit sends a black screen trigger instruction to the timing controller, wherein the black screen trigger instruction is used to instruct the timing controller to output target grayscale information to the display driving circuit, so that the display panel performs a black screen Display: when the level conversion circuit receives the trigger result fed back by the level conversion circuit, it outputs a high-impedance signal to the gate drive circuit, so that the display panel remains black.

According to the overcurrent protection method of the display panel in the embodiment of the present invention, when it is determined that an overcurrent phenomenon occurs on the display panel, the level conversion circuit sends a black screen trigger instruction to the timing controller, and the timing controller outputs the target gray when receiving the black screen trigger instruction. Level information is given to the display drive circuit, so that the display panel displays a black screen, and the trigger result is fed back to the level conversion circuit. When the level conversion circuit receives the trigger result fed back by the level conversion circuit, it outputs a high-impedance signal to the gate Drive the circuit to keep the display panel black. Therefore, the method can control the display panel to display a black screen when an overcurrent phenomenon occurs on the display panel, so that the user will not see abnormal images such as blurred screen, thereby reducing user complaints and reducing the risk of product return.

In addition, the overcurrent protection method for a display panel according to the above-mentioned embodiments of the present invention may also have the following additional technical features:

According to an embodiment of the present invention, determining that an overcurrent phenomenon occurs on the display panel includes: determining that an overcurrent phenomenon occurs on the display panel when it is recognized that an overcurrent protection condition in the gate drive circuit is triggered.

According to an embodiment of the present invention, the target gray scale information is L0 display gray scale.

According to an embodiment of the present invention, the above method further includes: when it is determined that the over-current phenomenon of the display panel is resolved, sending an instruction to restore normal display to the timing controller, and the timing controller outputs normal gray scale information to the timing controller according to the instruction to restore normal display. When displaying the driving circuit, output a normal level signal to the gate driving circuit.

Additional aspects and advantages of the invention 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 the invention.

Description of drawings

1 is a schematic block diagram of an overcurrent protection device for a display panel according to an embodiment of the present invention;

2 is a schematic block diagram of an overcurrent protection device for a display panel according to an embodiment of the present invention;

3 is a schematic block diagram of a display panel according to an embodiment of the present invention;

4 is a schematic block diagram of an electronic device according to an embodiment of the present invention;

FIG. 5 is a flowchart of an overcurrent protection method for a display panel according to an embodiment of the present invention.

Detailed ways

Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

The following describes an overcurrent protection device for a display panel, a display panel, an electronic device, and an overcurrent protection method for a display panel proposed by embodiments of the present invention with reference to the accompanying drawings.

FIG. 1 is a schematic block diagram of an overcurrent protection device for a display panel according to an embodiment of the invention.

As shown in FIG. 1 , an overcurrent protection device 100 for a display panel according to an embodiment of the present invention may include a level conversion circuit 110 , a gate driving circuit 120 , a display driving circuit 140 and a timing controller 130 .

Wherein, the level conversion circuit 110 is used to send a black screen trigger instruction to the timing controller 130 when it is determined that an overcurrent phenomenon occurs on the display panel; the timing controller 130 is used to output target grayscale information to the display driving circuit when receiving the black screen trigger instruction 140, and feed back the trigger result to the level conversion circuit 110; the display drive circuit 140 is used to control the display panel to perform black screen display when receiving the target grayscale information; the level conversion circuit 110 is also used to output a high impedance when receiving the trigger result The state signal is sent to the gate driving circuit 120, so that the display panel keeps a black screen display.

It should be noted that the target grayscale information is the displayed grayscale of L0.

Specifically, as shown in FIG. 1, the level conversion circuit 110 is connected to the gate drive circuit 120, and outputs a normal level signal to the gate drive circuit 120 when the display panel is normally displayed, so that the gate drive circuit 120 controls the display. The pixel array of the panel normally displays images and detects the current value in the gate driving circuit 120 . The timing controller 130 is connected to the display driving circuit 140, and the timing controller 130 can send grayscale information to the display driving circuit 140, so that the display driving circuit 140 can drive the display panel to display images normally. The level conversion circuit 110 establishes a communication connection with the timing controller 130 , and signal transmission can be performed between the level conversion circuit 110 and the timing controller 130 .

When an electronic device (such as a TV) is turned on abnormally and the display panel triggers overcurrent protection, the level conversion circuit 110 can determine that the display panel has an overcurrent phenomenon according to the current signal of the gate drive circuit 120, and when it is determined that the display panel has an overcurrent When the phenomenon occurs, a black screen trigger command is sent to the timing controller 130 , and the timing controller 130 outputs an L0 display gray scale to the display driving circuit 140 when receiving the black screen trigger command. When the display driving circuit 140 receives the display gray scale of L0, it controls the display panel to display a black screen image. At this time, the display image displayed by the display panel seen by the user is the same as that in the power-off state.

After the display screen is refreshed for one frame, the timing controller 130 feeds back to the level conversion circuit 110 that the black screen trigger command has been triggered, and the level conversion circuit 110 outputs a high-impedance signal to the gate when receiving the trigger result that the black screen trigger command has been triggered The driving circuit 120 and the gate driving circuit 120 control the pixel array of the display panel to be in an off state after receiving the high-impedance signal, so that the display panel maintains a black screen display. At this time, the display screen displayed by the user on the display panel is the same as that in the shutdown state, and no abnormal phenomenon such as blurred screen appears on the display panel. customer complaints.

Therefore, the overcurrent protection device for the display panel of the embodiment of the present invention can control the display panel to display a black screen when an overcurrent phenomenon occurs on the display panel, so that the user will not see abnormal phenomena such as blurred screen, thereby reducing user complaints. Reduce the risk of product returns.

According to an embodiment of the present invention, the level conversion circuit 110 is also used to determine that the display panel has an over-current phenomenon when it is recognized that the over-current protection condition in the gate driving circuit 120 is triggered.

Specifically, the overcurrent protection condition may be that when the current value in the gate driving circuit 120 is greater than a set threshold, it is determined that the gate driving circuit 120 is in an overcurrent state, which meets the overcurrent protection condition. The level conversion circuit 110 can detect the current in the gate driving circuit 120, and when the current value in the gate driving circuit 120 is greater than a set threshold, it is determined that the display panel has an overcurrent phenomenon.

According to an embodiment of the present invention, a communication connection is established between the level conversion circuit 110 and the timing controller 130, so as to realize the sending of the black screen trigger instruction and the feedback of the trigger result.

That is to say, the signal is transmitted between the level conversion circuit 110 and the timing controller 130 through communication. When an overcurrent phenomenon occurs on the display panel, the level conversion circuit 110 sends a black screen trigger instruction to the timing controller 130 through communication, and the timing control The device 130 feeds back to the level conversion circuit 110 that the black screen trigger instruction has been triggered through communication.

According to an embodiment of the present invention, as shown in FIG. 2, a communication connection is established between the level conversion circuit 110 and the timing controller 130 through the first communication port GPIO1 and the second communication port GPIO2, wherein the level conversion circuit 110 is connected through Change the level of the first communication port GPIO1 so that the timing controller 130 receives a black screen trigger command; the timing controller 130 changes the level of the second communication port GPIO2 so that the level conversion circuit 110 receives the trigger result.

Further, according to an embodiment of the present invention, the timing controller 130 is also used to change the level of the second communication port GPIO2 after outputting the target grayscale information to the display driving circuit 140 in the current frame, and continue to send The display driving circuit 140 outputs target grayscale information.

Specifically, as shown in FIG. 2 , the level conversion circuit 110 communicates with the timing controller 130 through the first communication port GPIO1 and the second communication port GPIO2 . Assume that when the display panel displays normally, the signals of the first communication port GPIO1 and the second communication port GPIO2 are both low level. When the display panel triggers the over-current protection, the level conversion circuit 110 converts the low-level signal of the first communication port GPIO1 into a high-level signal, and sends it to the timing controller 130, so that the timing controller 130 receives a black screen trigger command . When the timing controller 130 receives the black screen trigger instruction, it outputs to the display driving circuit 140 the display gray scale as L0. The display driving circuit 140 controls the display panel to display a black screen image when receiving the L0 display gray scale.

After the display screen is refreshed for one frame, the timing controller 130 converts the low-level signal of the second communication port GPIO2 into a high-level signal, and feeds back to the level conversion circuit 110 that the black screen trigger command has been triggered, and the level conversion circuit 110 is receiving When the trigger result of the black screen trigger command has been triggered, a high-impedance signal is output to the gate drive circuit 120. After receiving the high-impedance signal, the gate drive circuit 120 controls the pixel array of the display panel to be in an off state, so that the display panel Keep the screen black. The timing controller 130 continuously outputs to the display driving circuit 140 a display gray scale of L0. The display driving circuit 140 controls the display panel to continue displaying black screen images when receiving the L0 display gray scale. At this time, the display screen displayed by the user on the display panel is the same as that in the shutdown state, and no abnormal phenomena such as blurred screen appear on the display panel. Therefore, it can be seen that the output of the high-impedance signal by the level shifting circuit 110 needs to satisfy the triggering condition of the over-current protection and the signal of the second communication port GPIO2 is at a high level at the same time.

According to an embodiment of the present invention, the level conversion circuit 110 is also used to send a normal display instruction to the timing controller 130 when it is determined that the overcurrent phenomenon of the display panel is resolved, and the timing controller 130 receives the normal display instruction Output the normal gray scale information to the display driving circuit 140 , and notify the level conversion circuit 110 to output the normal level signal to the gate driving circuit 120 .

Specifically, when the level conversion circuit 110 detects that the current value in the gate driving circuit 120 is lower than the set threshold, it can determine that the overcurrent phenomenon of the display panel is resolved, and send a normal display instruction to the timing controller 130 . The timing controller 130 outputs the normal grayscale information to the display driving circuit 140 when receiving the normal display instruction, and then notifies the level conversion circuit 110 of the outputted normal grayscale information. After receiving the outputted normal gray scale information, the level conversion circuit 110 switches the high-impedance state signal into a normal level signal and sends it to the gate driving circuit 120 . After the gate driving circuit 120 receives the normal level signal and the display driving circuit 140 receives the normal gray scale information, the display driving circuit 140 controls the display panel to display normally.

Further description will be made below with reference to FIG. 2 . When the level conversion circuit 110 detects that the current value in the gate drive circuit 120 is lower than the set threshold value, it can be determined that the overcurrent phenomenon of the display panel is removed, and the high level signal of the first communication port GPIO1 is converted into a low level signal , so as to send the instruction of returning to normal display to the timing controller 130 . When the timing controller 130 receives the normal display instruction, it switches the L0 display link to normal gray scale information and outputs it to the display driving circuit 140, and converts the high-level signal of the second communication port GPIO2 into a low-level signal, In order to notify the level shifting circuit 110 of the outputted normal gray scale information. After receiving the outputted normal gray scale information, the level conversion circuit 110 switches the high-impedance state signal into a normal level signal and sends it to the gate driving circuit 120 . After the gate driving circuit 120 receives the normal level signal and the display driving circuit 140 receives the normal grayscale information, the display driving circuit 140 controls the display panel to display normally.

To sum up, according to the overcurrent protection device of the display panel in the embodiment of the present invention, the level conversion circuit sends a black screen trigger instruction to the timing controller when it is determined that an overcurrent phenomenon occurs in the display panel, and the timing controller receives the black screen trigger instruction output the target grayscale information to the display drive circuit, and feed back the trigger result to the level conversion circuit; when the display drive circuit receives the target grayscale information, it controls the display panel to display a black screen; the level conversion circuit outputs high when receiving the trigger result The resistance signal is given to the gate drive circuit to keep the display panel black. Therefore, when the display panel has an overcurrent phenomenon, the device can control the display panel to display a black screen image, so that users will not see abnormal images such as blurred screens, thereby reducing user complaints and reducing the risk of product returns.

Corresponding to the above-mentioned embodiments, the present invention also provides a display panel.

FIG. 3 is a schematic block diagram of a display panel according to an embodiment of the invention.

As shown in FIG. 3 , the display panel 200 of the embodiment of the present invention includes the overcurrent protection device 100 for the display panel of the above embodiment.

According to the display panel of the embodiment of the present invention, through the above-mentioned overcurrent protection device of the display panel, when the overcurrent phenomenon occurs on the display panel, the display panel can be controlled to display a black screen image, so that the user will not see abnormal images such as blurred screen, thereby Reduce user complaints and reduce the risk of product returns.

Corresponding to the foregoing embodiments, the present invention also provides an electronic device.

FIG. 4 is a schematic block diagram of an electronic device according to an embodiment of the present invention.

As shown in FIG. 4 , an electronic device 300 according to an embodiment of the present invention includes the above-mentioned display panel 200 .

According to the electronic device of the embodiment of the present invention, the above-mentioned display panel can control the display panel to display a black screen when an overcurrent phenomenon occurs on the display panel, so that the user will not see abnormal images such as blurred screens, thereby reducing user complaints. Reduce the risk of product returns.

Corresponding to the above-mentioned embodiments, the present invention also proposes an overcurrent protection method for a display panel.

FIG. 5 is a flowchart of an overcurrent protection method for a display panel according to an embodiment of the present invention.

In one embodiment of the present invention, the display panel includes a level conversion circuit, a gate driving circuit, a display driving circuit and a timing controller.

As shown in FIG. 5, the overcurrent protection method for a display panel according to an embodiment of the present invention may include the following steps:

S1, when it is determined that the overcurrent phenomenon occurs on the display panel, the level conversion circuit sends a black screen trigger instruction to the timing controller, wherein the black screen trigger instruction is used to instruct the timing controller to output target grayscale information to the display drive circuit, so that the display panel Make a black screen display.

S2, when the level conversion circuit receives the trigger result fed back by the level conversion circuit, it outputs a high-impedance signal to the gate drive circuit, so that the display panel keeps a black screen display.

According to an embodiment of the present invention, determining that an overcurrent phenomenon occurs on the display panel includes: determining that an overcurrent phenomenon occurs on the display panel when it is recognized that an overcurrent protection condition in the gate drive circuit is triggered.

According to an embodiment of the present invention, the target gray scale information is L0 display gray scale.

According to an embodiment of the present invention, the above method further includes: when it is determined that the over-current phenomenon of the display panel is resolved, sending an instruction to restore normal display to the timing controller, and the timing controller outputs normal gray scale information to the timing controller according to the instruction to restore normal display. When displaying the driving circuit, output a normal level signal to the gate driving circuit.

It should be noted that for the details not disclosed in the overcurrent protection method of the display panel in the embodiment of the present invention, please refer to the details disclosed in the overcurrent protection device of the display panel in the embodiment of the present invention, and details are not repeated here.

According to the overcurrent protection method of the display panel in the embodiment of the present invention, when it is determined that an overcurrent phenomenon occurs on the display panel, the level conversion circuit sends a black screen trigger instruction to the timing controller, and the timing controller outputs the target gray when receiving the black screen trigger instruction. Level information is given to the display drive circuit, so that the display panel displays a black screen, and the trigger result is fed back to the level conversion circuit. When the level conversion circuit receives the trigger result fed back by the level conversion circuit, it outputs a high-impedance signal to the gate Drive the circuit to keep the display panel black. Therefore, the method can control the display panel to display a black screen when an overcurrent phenomenon occurs on the display panel, so that the user will not see abnormal images such as blurred screen, thereby reducing user complaints and reducing the risk of product return.

It should be noted that the logic and/or steps shown 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 an instruction execution system, apparatus, or device (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, apparatus, or device and execute instructions), or in combination with these Instructions are used to execute systems, devices, or equipment. For the purposes of this specification, a "computer-readable medium" may be any device that can contain, store, communicate, propagate or transmit a program for use in or in conjunction with an instruction execution system, device or device. More specific examples (non-exhaustive list) of computer-readable media include the following: electrical connection with one or more wires (electronic device), portable computer disk case (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 Compact Disc Read Only Memory (CDROM). In addition, the computer-readable medium may even be paper or other suitable medium on which the program can be printed, since the program can be read, for example, by optically scanning the paper or other medium, followed by editing, interpretation or other suitable processing if necessary. The program is processed electronically and stored in computer memory.

It should be understood that various parts of the present invention can be realized by hardware, software, firmware or their combination. In the embodiments described above, various steps or methods may be implemented by 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 by any one or combination of the following techniques known in the art: Discrete logic circuits, ASICs with suitable combinational logic gates, programmable gate arrays (PGAs), field programmable gate arrays (FPGAs), etc.

In the description of this specification, descriptions referring to the terms "one embodiment", "some embodiments", "example", "specific examples", or "some examples" mean that specific features described in connection with the embodiment or example , structure, material or characteristic is included in at least one embodiment or example of the present invention. In this specification, schematic representations 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 any one or more embodiments or examples.

In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

In the present invention, unless otherwise clearly specified and limited, terms such as "installation", "connection", "connection" and "fixation" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection , or integrated; it may be mechanically connected or electrically connected; it may be directly connected or indirectly connected through an intermediary, and it may be the internal communication of two components or the interaction relationship between two components, unless otherwise specified limit. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention according to specific situations.

Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention, those skilled in the art can make the above-mentioned The embodiments are subject to changes, modifications, substitutions and variations.

Claims (13)

1. An over-current protection device of a display panel is characterized by comprising a level conversion circuit, a grid driving circuit, a display driving circuit and a time schedule controller,

the level conversion circuit is used for sending a black screen trigger instruction to the time sequence controller when the overcurrent phenomenon of the display panel is determined;

the time sequence controller is used for outputting target gray scale information to the display driving circuit when receiving the black screen triggering instruction and feeding back a triggering result to the level conversion circuit;

the display driving circuit is used for controlling the display panel to carry out black screen display when receiving the target gray scale information;

and the level conversion circuit is also used for outputting a high-impedance state signal to the grid drive circuit when receiving the trigger result so as to enable the display panel to keep black screen display.

2. The over-current protection device of a display panel according to claim 1, wherein the level shifter circuit is further configured to determine that an over-current phenomenon occurs in the display panel when an over-current protection condition in the gate driving circuit is triggered.

3. The over-current protection device of a display panel according to claim 1, wherein the level shifter circuit is in communication with the timing controller to implement the black screen trigger command transmission and the trigger result feedback.

4. The over-current protection device of claim 3, wherein the level shifter circuit and the timing controller are connected via a first communication port and a second communication port, wherein,

the level conversion circuit changes the level of the first communication port to enable the timing controller to receive the black screen triggering instruction;

and the time schedule controller enables the level conversion circuit to receive the triggering result by changing the level of the second communication port.

5. The over-current protection device of claim 4, wherein the timing controller is further configured to change a level of the second communication port after the current frame outputs the target gray scale information to the display driving circuit, and to continuously output the target gray scale information to the display driving circuit in a next frame.

6. The over-current protection device for a display panel according to any one of claims 1 to 5, wherein the target gray scale information is an L0 display gray scale.

7. The over-current protection device for a display panel according to any one of claims 1 to 5, wherein the level shift circuit is further configured to send a normal display restoration instruction to the timing controller when it is determined that the over-current phenomenon of the display panel is released, and the timing controller outputs normal gray scale information to the display driving circuit when receiving the normal display restoration instruction and notifies the level shift circuit to output a normal level signal to the gate driving circuit.

8. A display panel characterized by comprising the overcurrent protection apparatus of the display panel according to any one of claims 1 to 7.

9. An electronic device characterized by comprising the display panel according to claim 8.

10. An overcurrent protection method of a display panel, wherein the display panel comprises a level shift circuit, a gate driving circuit, a display driving circuit and a timing controller, wherein the method comprises:

when the overcurrent phenomenon of the display panel is determined, the level conversion circuit sends a black screen triggering instruction to the time sequence controller, wherein the black screen triggering instruction is used for indicating the time sequence controller to output target gray scale information to the display driving circuit so as to enable the display panel to carry out black screen display;

and when receiving a trigger result fed back by the level conversion circuit, the level conversion circuit outputs a high-resistance state signal to the grid drive circuit so as to enable the display panel to keep black screen display.

11. The method of claim 10, wherein determining that the display panel is over-current comprises:

and when the overcurrent protection condition in the grid driving circuit is identified to be triggered, determining that the display panel has an overcurrent phenomenon.

12. The method of claim 10, wherein the target gray scale information is an L0 display gray scale.

13. The method according to any one of claims 10-12, further comprising:

and when determining that the overcurrent phenomenon of the display panel is relieved, sending a normal display restoration instruction to the time sequence controller, and outputting a normal level signal to the grid drive circuit when the time sequence controller outputs normal gray scale information to the display drive circuit according to the normal display restoration instruction.

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