Overcurrent protection method for clock signal, potential conversion circuit, display device

Abstract

The present application discloses an overcurrent protection method for a clock signal, a potential conversion circuit, and a display device. The overcurrent protection method for the clock signal includes obtaining a preset potential time when the input clock signal is at a preset potential in one signal cycle; obtaining an interval time and a detection time for the overcurrent protection module in the potential conversion circuit to perform overcurrent protection on the output clock signal; determining whether the interval time and the detection time match the preset potential time; if they match, performing overcurrent protection on the output clock signal with the interval time and the detection time; if they do not match, resetting the interval time and / or the detection time of the overcurrent protection module, and returning to the step of obtaining the interval time and the detection time for the overcurrent protection module in the potential conversion circuit to perform overcurrent protection on the output clock signal until a match is determined. The technical solution of the present application can improve the stability of overcurrent protection of the potential conversion circuit.

Description

Technical Field

[0001] This application relates to the field of display technologies, and particularly to an overcurrent protection method for a clock signal, a potential conversion circuit, and a display device. Background Art

[0002] Currently, the potential conversion circuit in a display panel not only needs to provide a clock signal for the gate driving circuit of the array substrate, but also needs to monitor the signal current of the clock signal to perform overcurrent protection in a timely manner when a short circuit occurs in the clock signal line, so as to avoid the polarizer being burned due to the increase in the temperature of the short circuit point.

[0003] However, the interval time and detection time required for the existing potential conversion circuit to trigger overcurrent protection are set according to the default refresh rate of the display panel. Currently, display devices usually integrate a function of adjustable refresh rate. Thus, after the refresh rate is adjusted, the overcurrent protection function of the potential conversion circuit will be abnormal. Summary of the Invention

[0004] The main purpose of this application is to provide an overcurrent protection method for a clock signal, aiming to solve the problem that the overcurrent protection function of the potential conversion circuit is abnormal due to the adjustment of the refresh rate.

[0005] To achieve the above purpose, the overcurrent protection method for a clock signal proposed in this application, which is applied to a potential conversion circuit, includes:

[0006] Step S10: Obtain the preset potential time when the input clock signal is at a preset potential in one signal cycle;

[0007] Step S20: Obtain the interval time and detection time for the overcurrent protection module in the potential conversion circuit to perform overcurrent protection on the output clock signal;

[0008] Step S30: Determine whether the interval time and detection time match the preset potential time;

[0009] Step S40: If they match, perform overcurrent protection on the output clock signal with the interval time and detection time;

[0010] Step S50: If they do not match, reset the interval time and / or detection time of the overcurrent protection module, and return to Step S20 until it is determined that the interval time and detection time match the preset potential time.

[0011] Optionally, Step S30 further includes:

[0012] Step S31: Obtain a preset transition time;

[0013] Step S32: Determine whether the sum of the interval time, detection time, and preset transition time is less than the preset potential time;

[0014] If it is less than, determine that the interval time and the detection time match the preset potential time;

[0015] If it is not less than, determine that the interval time and the detection time do not match the preset potential time.

[0016] Optionally, step S50 includes:

[0017] Step S51: Select a preset overcurrent protection parameter from multiple preset overcurrent protection parameters, and each preset overcurrent protection parameter includes a preset interval time and / or a preset detection time;

[0018] Step S52: Use the preset interval time and the preset detection time in the selected preset overcurrent protection parameter as the reset interval time and / or detection time.

[0019] Optionally, before step S51, step S50 further includes:

[0020] Step S53: Arrange multiple preset overcurrent protection parameters from largest to smallest according to the sum of the preset interval time and the preset detection time in each preset overcurrent protection parameter to form a preset overcurrent protection parameter sequence;

[0021] Step S51 is specifically:

[0022] Select the preset overcurrent protection parameters from the preset overcurrent protection parameter sequence in the preset order.

[0023] Optionally, the preset order is from the first preset overcurrent protection parameter to the last preset overcurrent protection parameter.

[0024] Optionally, step S51 further includes:

[0025] Associate and store each preset overcurrent protection parameter with a refresh rate;

[0026] Step S51 is specifically:

[0027] Obtain the adjusted refresh rate, and select the preset overcurrent protection parameter associated and stored from multiple preset overcurrent protection parameters according to the adjusted refresh rate.

[0028] Optionally, any two of the multiple preset overcurrent protection parameters are the first preset overcurrent protection parameter and the second overcurrent protection parameter, and the refresh rate corresponding to the first preset overcurrent protection parameter is less than the refresh rate corresponding to the second preset overcurrent protection parameter;

[0029] The interval time of the first preset overcurrent protection parameter is greater than the interval time of the second preset overcurrent protection parameter; or, the detection time of the first preset overcurrent protection parameter is greater than the detection time of the second preset overcurrent protection parameter; or, at least one of the interval time and the detection time of the first preset overcurrent protection parameter is greater than the interval time and the detection time of the second preset overcurrent protection parameter.

[0030] Optionally, when the difference between the refresh rates corresponding to any two preset overcurrent protection parameters is within a preset refresh rate difference range, the detection times of the two preset overcurrent protection parameters are the same.

[0031] This application also provides a potential conversion circuit for implementing the overcurrent protection method of the clock signal as described above. The potential conversion circuit includes:

[0032] An overcurrent protection module for performing overcurrent protection on the output clock signal according to the interval time and the detection time;

[0033] A timing module for timing the preset potential time when the input clock signal is at a preset potential in one signal cycle and outputting a timing result;

[0034] A control module is connected to the overcurrent protection module and the timing module; the control module is configured to obtain the preset potential time when the input clock signal is at a preset potential in one signal cycle according to the timing result; obtain the interval time and the detection time for the overcurrent protection module to perform overcurrent protection on the output clock signal; determine whether the interval time and the detection time match the preset potential time; if they match, control the overcurrent protection module to perform overcurrent protection on the output clock signal according to the interval time and the detection time; if they do not match, reset the interval time and / or the detection time of the overcurrent protection module, and return to determine whether the interval time and the detection time match the preset potential time.

[0035] This application also provides a display device, which includes:

[0036] An array substrate gate driving circuit; and,

[0037] The potential conversion circuit as described above, and the clock output end of the potential conversion circuit is connected to the clock input end of the array substrate gate driving circuit in one-to-one correspondence.

[0038] The technical solution of this application adopts the steps of obtaining the preset potential time when the input clock signal is at the preset potential in a signal cycle; obtaining the interval time and detection time for overcurrent protection of the output clock signal by the overcurrent protection module in the potential conversion circuit; determining whether the interval time and detection time match the preset potential time; if they match, performing overcurrent protection on the output clock signal with the interval time and detection time; if they do not match, resetting the interval time and / or detection time of the overcurrent protection module, and returning to the step of obtaining the interval time and detection time for overcurrent protection of the output clock signal by the overcurrent protection module in the potential conversion circuit until it is determined that the interval time and detection time match the preset potential time. The overcurrent protection method for the clock signal in this application can switch the interval time and / or detection time required for overcurrent protection of the overcurrent protection module in a timely manner when the refresh rate of the display panel is adjusted, and make the switched interval time and / or detection time match the preset potential time, so as to avoid the situation of easy false triggering or inability to trigger overcurrent protection caused by the interval time and detection time being shorter or longer than the preset potential time before switching. Therefore, the problem of abnormal overcurrent protection function of the refresh rate adjustment potential conversion circuit is solved, which is beneficial to improving the stability of overcurrent protection of the potential conversion circuit, and further beneficial to improving the display stability and service life of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0040] Figure 1 It is a flowchart of the overcurrent protection method for the clock signal in the first embodiment of the present application;

[0041] Figure 2 It is another flowchart of the overcurrent protection method for the clock signal in the first embodiment of the present application;

[0042] Figure 3 It is yet another flowchart of the overcurrent protection method for the clock signal in the first embodiment of the present application;

[0043] Figure 4 It is still another flowchart of the overcurrent protection method for the clock signal in the first embodiment of the present application;

[0044] Figure 5 It is a module schematic diagram of the potential conversion circuit in the second embodiment of the present application;

[0045] Figure 6This is a schematic diagram of the modules of the display device according to the third embodiment of the present application.

[0046] Explanation of the reference numerals in the drawings:

[0047]

[0048] The realization of the purpose of the present application, functional features and advantages will be further described in conjunction with the embodiments with reference to the accompanying drawings. Specific embodiments

[0049] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0050] In addition, in the present application, descriptions such as "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments may be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of the technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present application.

[0051] Embodiment 1:

[0052] The present application proposes an overcurrent protection method for a clock signal, which is applied to a potential conversion circuit.

[0053] The potential conversion circuit can provide a clock signal at a preset potential for the gate driving circuit of the array substrate to turn on the corresponding thin film transistor therein. Among them, the preset level can be determined by the type of thin film transistor that the clock signal is used to turn on in the gate driving circuit of the array substrate. For example: if the type of thin film transistor used to turn on is N-type, the preset potential can be a high potential; if the type of thin film transistor used to turn on is P-type, the preset potential can be a low potential. The following takes the preset potential as a high potential as an example to explain Embodiment 1 of the present application.

[0054] Since the thin film transistor is turned on under the action of a clock signal at a high potential, the signal current of the clock signal will decrease accordingly. When the clock signal line is not short-circuited, the current value of the signal current will decrease to no more than a preset current threshold within an interval time and remain so until the end of the signal period; when the clock signal line is short-circuited, the signal current will decrease to be greater than the preset current threshold within the interval time, that is, it will still be higher than the preset current threshold at the end of the interval time and remain so until the end of the signal period. The prior art determines whether the signal current is greater than the preset current threshold at the end of the interval time and whether the signal current maintains a detection time when it is greater than the preset current threshold, and disconnects the output of the clock signal of the potential conversion circuit when both judgment results are yes, so as to achieve overcurrent protection. However, due to the change of the refresh rate, the high-potential duration will increase or decrease correspondingly. Among them, when the high-potential duration increases, the original interval time and detection time will be shorter compared with the high-potential duration, and it is easy to mis-trigger overcurrent protection, thus affecting the normal display of the display panel; when the high-potential duration decreases, the original interval time and detection time will be longer compared with the high-potential duration, and overcurrent protection cannot be triggered.

[0055] In view of the above problems, referring to Figure 1 , the overcurrent protection method for the clock signal includes:

[0056] Step S10: Obtain the preset potential time when the input clock signal is at a preset potential in a signal period.

[0057] In this embodiment, the execution subject of the overcurrent protection method for the clock signal can be a control module in the potential conversion circuit. A timing module can be provided in the potential conversion circuit. The timing module can access the clock signal after potential amplification of the potential conversion circuit and output a timing result to the control module after timing the preset potential time when the clock signal is at a preset potential in a signal period, so that the control module can obtain the preset potential time according to the timing result.

[0058] It should be noted that the amplification of the clock signal by the potential conversion circuit is only the amplification of the signal amplitude and will not affect its signal period. The length of the signal period is inversely proportional to the refresh rate of the display panel, and the length of the signal period is directly proportional to the length of its preset potential time. Specifically: the lower the refresh rate, the longer the signal period and the preset potential time of the clock signal; the higher the refresh rate, the shorter the signal period and the preset potential time of the clock signal. Therefore, the refresh rate of the current display panel can be determined by obtaining the preset potential time of the clock signal in a signal period.

[0059] Step S20: Obtain the interval time and detection time for the overcurrent protection module in the potential conversion circuit to perform overcurrent protection on the output clock signal.

[0060] The control module can obtain the current interval time and detection time of the overcurrent protection module through a call, and the overcurrent protection module can perform overcurrent protection on the output clock signal according to the current interval time and detection time.

[0061] Step S30: Determine whether the interval time and detection time match the preset potential time.

[0062] The control module can determine the refresh rate corresponding to the interval time and detection time set by the current potential conversion circuit, and its corresponding preset potential time. Since the refresh rate can be adjusted, the preset potential time determined here can be regarded as the default preset potential time, the determined refresh rate can be regarded as the default refresh rate, and the potential time obtained in step S10 can be regarded as the actual potential time. Step S30 can be achieved by comparing the default preset potential time with the actual potential time. Or, it can also be by determining the actual refresh rate corresponding to the actual potential time and determining the default refresh rate corresponding to the default preset potential, so as to achieve step S30 by comparing the default refresh rate with the actual refresh rate.

[0063] If they match, execute step S40: Perform overcurrent protection on the output clock signal with the interval time and detection time.

[0064] When the default preset potential time is the same as the actual preset potential time, or the default refresh rate is the same as the actual refresh rate, it can be determined that the interval time and detection time match the preset potential time, that is, the interval time and detection time can effectively trigger overcurrent protection at the current resolution. At this time, the control module can control the overcurrent protection module not to change the interval time and detection time, so that the overcurrent protection module can continue to perform overcurrent protection on the output clock signal with the currently set interval time and detection time.

[0065] If they do not match, execute step S50: Reset the interval time and / or detection time of the overcurrent protection module, and return to the step of determining whether the interval time and detection time match the preset potential time.

[0066] When the default preset potential time is different from the actual preset potential time, or the default refresh rate is different from the actual refresh rate, it can be determined that the interval time and detection time do not match the preset potential time, that is, the interval time and detection time are too long or too short compared with the preset potential time, and it is easy to mis-trigger or fail to trigger overcurrent protection.

[0067] Optionally, step S50 may include: step S51, selecting a preset overcurrent protection parameter from multiple preset overcurrent protection parameters, each preset overcurrent protection parameter including a preset interval time and / or a preset detection time; step S52, using the preset interval time and the preset detection time in the selected preset overcurrent protection parameter as the reset interval time and / or detection time.

[0068] Since the number of refresh rate levels of the current display panel is limited, a corresponding interval time and / or detection time can be pre-integrated in the overcurrent protection module for each refresh rate level, so that when the control module confirms a mismatch, it can be switched to another interval time and / or another detection time under the control of the control module, thereby realizing the reset of the interval time and / or detection time. At this time, the control module can re-execute step S20 to obtain another interval time and / or another detection time after the overcurrent protection module is switched, and can re-execute step S30 according to the switched another interval time and / or another detection time, and so on in a loop until the result of step S30 is a match.

[0069] In this way, when the refresh rate of the display panel is adjusted, the interval time and / or detection time required for overcurrent protection of the overcurrent protection module can be switched in time, and the switched interval time and / or detection time can be matched with the preset potential time, so as to avoid the situation of easy mis-triggering or failure to trigger overcurrent protection caused by the interval time and detection time being shorter or longer than the preset potential time before switching. Therefore, the problem of abnormal overcurrent protection function of the refresh rate adjustment potential conversion circuit is solved, which is beneficial to improving the stability of overcurrent protection of the potential conversion circuit, and further beneficial to improving the display stability and service life of the display panel.

[0070] Refer to Figure 2 , step S30 for determining whether the interval time and the detection time match the preset potential time further includes:

[0071] Step S31, obtaining a preset transition time;

[0072] Step S32, determining whether the sum value of the interval time, the detection time, and the preset transition time is less than the preset potential time;

[0073] If it is less, it is a match;

[0074] If it is not less, it is a mismatch.

[0075] Since the preset potential of the clock signal will jump to another preset potential after the end of the preset potential time to control the thin-film transistor to turn off, and a current spike will be generated in the signal current of the clock signal during the jump process. If only the interval time and the detection time are determined to be less than the preset potential time, there will be a situation where the re-switching interval time and the detection time are equal to the preset potential time, so that the duration of the current spike is within the detection time, increasing the probability that the signal current maintains the detection time when it is greater than the preset current threshold, and thus increasing the probability of false triggering of overcurrent protection.

[0076] To solve this problem, the overcurrent protection method of the clock signal in this application adds a preset transition time, and the preset transition time can be set corresponding to the duration of the current spike, which is not limited here. In this way, the preset transition time is used to offset the duration of the current spike, so as to avoid the probability of false triggering of overcurrent protection after the current spike increases the switching interval time and the detection time, which is beneficial to improving the stability and accuracy of overcurrent protection.

[0077] It should be noted that when determining whether the interval time and the detection time match the preset potential time, the sum of the interval time, the detection time, and the preset transition time should be slightly less than the preset potential time and approximately equal to the preset potential time. When randomly selecting from multiple preset overcurrent protection parameters, there may be a situation where the sum of the preset interval time and the preset detection time directly selected is too small, that is, a preset overcurrent protection parameter corresponding to a higher refresh rate is selected, resulting in the sum of the preset interval time, the preset detection time, and the preset transition time being much less than the preset potential time. In this case, even if overcurrent protection can be performed, the effectiveness of overcurrent protection will be low because the preset overcurrent protection parameters do not fully cover the preset potential time.

[0078] To solve this problem, referring to Figure 3 , before step S51 of selecting a preset overcurrent protection parameter from multiple preset overcurrent protection parameters, step S50 of re-setting the interval time and / or the detection time of the overcurrent protection module further includes:

[0079] Step S53: Arrange the multiple preset overcurrent protection parameters from largest to smallest according to the sum of the preset interval time and the preset detection time in each preset overcurrent protection parameter to form a preset overcurrent protection parameter sequence.

[0080] It is actually verified that the total duration of the interval time and the detection time required by the display panel with a lower refresh rate is longer, and the total duration of the interval time and the detection time required by the display panel with a higher refresh rate is shorter. Therefore, for two adjacent preset overcurrent protection parameters in the preset overcurrent protection parameter sequence, at least one of the preset interval time and / or the preset detection time in the previous preset overcurrent protection parameter is correspondingly greater than the preset interval time and / or the preset detection time in the latter preset overcurrent protection parameter.

[0081] The step S51 of selecting a preset overcurrent protection parameter from multiple preset overcurrent protection parameters is specifically: sequentially select the preset overcurrent protection parameters from the preset overcurrent protection parameter sequence in a preset order.

[0082] In this embodiment, the preset order may be: from the first preset overcurrent protection parameter to the last preset overcurrent protection parameter, that is, first select the first preset overcurrent protection parameter with the largest sum value of the preset interval time and the preset detection time, then select the second preset overcurrent protection parameter with the second largest sum value of the preset interval time and the preset detection time... Finally, select the last preset overcurrent protection parameter with the smallest sum value of the preset interval time and the preset detection time. In this way, the preset overcurrent protection parameter with a larger sum value of the preset interval time and the preset detection time can be preferentially selected to execute step S51, so as to avoid the situation that the sum value of the preset interval time, the preset detection time and the preset transition time is much smaller than the preset potential time, so that the selected preset overcurrent protection parameter can fully cover the current preset potential time, which is beneficial to improving the effectiveness and stability of overcurrent protection.

[0083] In response to this problem, referring to Figure 4 , before the step S51 of selecting a preset overcurrent protection parameter from multiple preset overcurrent protection parameters, the step S50 of resetting the interval time and / or the detection time of the overcurrent protection module further includes:

[0084] Step S54, associatively store each preset overcurrent protection parameter with a refresh rate.

[0085] In this application, it is possible to first measure the interval time and the detection time required for each refresh rate through pre-testing, and the measured interval time and detection time can be associatively stored with the corresponding refresh rate in the overcurrent protection module to form a preset overcurrent protection parameter-refresh rate mapping table, that is, the preset interval time and / or the preset detection time in each preset overcurrent protection parameter can correspond to the associatively stored refresh rate.

[0086] The step S51 of selecting a preset overcurrent protection parameter from multiple preset overcurrent protection parameters is specifically: obtain the refresh rate, and select the associatively stored preset overcurrent protection parameter from multiple preset overcurrent protection parameters according to the obtained refresh rate.

[0087] When the control module executes step S51, it can obtain the current refresh rate according to the preset potential time or communicate with the timing control board, and can directly call the preset overcurrent protection parameter corresponding to the current refresh rate from the preset overcurrent protection parameter-refresh rate mapping table. In this way, the re-setting of the interval time and the detection time can be achieved within a short time after the refresh rate is adjusted, so as to avoid the occurrence of short circuit when re-setting the preset overcurrent protection parameter and the situation that the overcurrent protection cannot be effectively carried out, which is beneficial to improving the stability of the overcurrent protection.

[0088] Optionally, any two of the multiple preset overcurrent protection parameters are the first preset overcurrent protection parameter and the second overcurrent protection parameter, where the refresh rate corresponding to the first preset overcurrent protection parameter is less than the refresh rate corresponding to the second preset overcurrent protection parameter:

[0089] When the preset overcurrent protection parameter only includes the interval time or the detection time, the interval time or the detection time of the first preset overcurrent protection parameter is greater than the interval time or the detection time of the second preset overcurrent protection parameter. When the preset overcurrent protection parameter includes the interval time and the detection time, at least one of the interval time and the detection time of the first preset overcurrent protection parameter is correspondingly greater than the interval time and the detection time of the second preset overcurrent protection parameter. That is, the interval times of the two preset overcurrent protection parameters can be equal, and the detection time of the first one is greater than the second one; or, the detection times of the two preset overcurrent protection parameters can be equal, and the interval time of the first one is greater than the second one; or, the interval time and the detection time of the first one can be greater than the second one.

[0090] Optionally, when the difference between the refresh rates corresponding to any two preset overcurrent protection parameters is within the preset refresh rate difference range, the detection times in the two preset overcurrent protection parameters are the same.

[0091] Since there are similar pixel levels such as 144HZ, 155HZ, 165HZ, 170HZ, etc. in the display panel, and it is found in actual verification that for similar pixel levels, only the detection time varies greatly among the interval time and detection time required for similar pixel levels. Therefore, the detection time of each preset overcurrent protection parameter corresponding to similar pixel levels, that is, the refresh rate difference within the preset refresh rate difference range, can be set to be the same to reduce the test cost of different refresh rate display panels in the early stage. In this application, the preset refresh rate difference range can be determined by multiple pre-experiments and is not limited here. This application provides the preset overcurrent protection parameters corresponding to two refresh rates of 144HZ and 165HZ here. Among them, the interval time and detection time corresponding to the display panel with a refresh rate of 144HZ can be 9 microseconds and 2 microseconds respectively; the interval time and detection time corresponding to the display panel with a refresh rate of 165HZ can be 4 microseconds and 2 microseconds respectively.

[0092] Embodiment 2:

[0093] Refer to Figure 5 , this application also proposes a potential conversion circuit 40, which includes an overcurrent protection module 10, a timing module 20, and a control module 30, and is used to implement the overcurrent protection method of the clock signal as described above. The specific steps of the overcurrent protection method of the clock signal refer to the above embodiment. Since this potential conversion circuit 40 can implement all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, and will not be elaborated here one by one.

[0094] Among them, the overcurrent protection module 10 is used to perform overcurrent protection on the output clock signal according to the interval time and detection time;

[0095] The timing module 20 is used to time the preset potential time when the input clock signal is at the preset potential in a signal cycle and output the timing result;

[0096] The control module 30 is connected to the overcurrent protection module 10 and the timing module 20; the control module 30 is used to obtain the preset potential time when the input clock signal is at the preset potential in a signal cycle according to the timing result; obtain the interval time and detection time for the overcurrent protection module 10 in the potential conversion circuit 40 to perform overcurrent protection on the output clock signal; determine whether the interval time and detection time match the preset potential time; if they match, perform overcurrent protection on the output clock signal with the interval time and detection time; if they do not match, reset the interval time and / or detection time of the overcurrent protection module 10, and return to the step of obtaining the interval time and detection time for the overcurrent protection module 10 in the potential conversion circuit 40 to perform overcurrent protection on the output clock signal until it is determined that the interval time and detection time match the preset potential time.

[0097] Embodiment 3:

[0098] Referring to FIG. 6, the present application further provides a display device, which includes an array substrate gate driving circuit 50 and a potential conversion circuit 40. The specific structure of the potential conversion circuit 40 refers to the above embodiments. Since the present display device adopts all the technical solutions of the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be elaborated herein one by one.

[0099] Among them, the display device may include a display panel. The array substrate gate driving circuit 50 may be formed on the display panel. The clock output terminals of the potential conversion circuit 40 are respectively connected to the clock input terminals of the array substrate gate driving circuit 50 in one-to-one correspondence. The potential conversion circuit 40 is configured to perform potential conversion on the input clock signal and output the converted potential to the array substrate gate driving circuit 50, so that the array substrate gate driving circuit 50 provides the scanning signal required for display for the display panel according to the input clock signal.

[0100] The above are only optional embodiments of the present application, and do not limit the patent scope of the present application. Any equivalent structural transformation made by using the content of the specification and drawings of the present application under the inventive concept of the present application, or direct / indirect application in other related technical fields is included in the patent protection scope of the present application.

Claims

1. An overcurrent protection method for a clock signal, which is applied to a potential conversion circuit, characterized in that, it includes: Step S10: Obtain the preset potential time when the input clock signal is at a preset potential in one signal cycle; Step S20: Obtain the interval time and detection time for the overcurrent protection module in the potential conversion circuit to perform overcurrent protection on the output clock signal; Step S30: Determine whether the interval time and the detection time match the preset potential time; Step S40: If they match, perform overcurrent protection on the output clock signal with the interval time and the detection time; Step S50: If they do not match, reset the interval time and / or detection time of the overcurrent protection module, and return to Step S20 until it is determined that the interval time and the detection time match the preset potential time.

2. The overcurrent protection method for a clock signal according to claim 1, characterized in that, Step S30 further includes: Step S31: Obtain a preset transition time; Step S32: Determine whether the sum of the interval time, the detection time, and the preset transition time is less than the preset potential time; If it is less, it is determined that the interval time and the detection time match the preset potential time; If it is not less, it is determined that the interval time and the detection time do not match the preset potential time.

3. The overcurrent protection method for a clock signal according to claim 1, characterized in that, Step S50 includes: Step S51: Select a preset overcurrent protection parameter from multiple preset overcurrent protection parameters, and each preset overcurrent protection parameter includes a preset interval time and / or a preset detection time; Step S52: Use the preset interval time and preset detection time in the selected preset overcurrent protection parameter as the reset interval time and / or detection time.

4. The overcurrent protection method for a clock signal according to claim 3, characterized in that, Before Step S51, Step S50 further includes: Step S53: Arrange the multiple preset overcurrent protection parameters from largest to smallest according to the sum of the preset interval time and preset detection time in each preset overcurrent protection parameter to form a preset overcurrent protection parameter sequence; Step S51 is specifically: Select the preset overcurrent protection parameters from the preset overcurrent protection parameter sequence in a preset order.

5. The overcurrent protection method for a clock signal according to claim 4, characterized in that, The preset order is from the first preset overcurrent protection parameter to the last preset overcurrent protection parameter.

6. The overcurrent protection method for a clock signal according to claim 3, characterized in that, Before Step S51, S50 further includes: Step S54: Associatively store each preset overcurrent protection parameter with a refresh rate; Step S51 is specifically: Obtain the adjusted refresh rate, and select the preset overcurrent protection parameter associated and stored from the multiple preset overcurrent protection parameters according to the adjusted refresh rate.

7. The overcurrent protection method for a clock signal according to claim 3, characterized in that, Any two of the multiple preset overcurrent protection parameters are the first preset overcurrent protection parameter and the second overcurrent protection parameter, and the refresh rate corresponding to the first preset overcurrent protection parameter is less than the refresh rate corresponding to the second preset overcurrent protection parameter; The interval time of the first preset overcurrent protection parameter is greater than the interval time of the second preset overcurrent protection parameter; Or, the detection time of the first preset overcurrent protection parameter is greater than the detection time of the second preset overcurrent protection parameter; or, at least one of the interval time and the detection time of the first preset overcurrent protection parameter is greater than the interval time and the detection time of the second preset overcurrent protection parameter.

8. The overcurrent protection method for a clock signal according to claim 3, characterized in that, When the difference between the refresh rates corresponding to any two preset overcurrent protection parameters is within a preset refresh rate difference range, the detection times in the two preset overcurrent protection parameters are the same.

9. A potential conversion circuit for implementing the overcurrent protection method for a clock signal according to any one of claims 1-8, characterized in that, The potential conversion circuit includes: An overcurrent protection module for performing overcurrent protection on the output clock signal according to the interval time and the detection time; A timing module for timing the preset potential time when the input clock signal is at a preset potential in one signal cycle and outputting a timing result; A control module connected to the overcurrent protection module and the timing module; the control module is used to obtain the preset potential time when the input clock signal is at a preset potential in one signal cycle according to the timing result; obtain the interval time and the detection time for the overcurrent protection module to perform overcurrent protection on the output clock signal; determine whether the interval time and the detection time match the preset potential time; if they match, control the overcurrent protection module to perform overcurrent protection on the output clock signal with the interval time and the detection time; if they do not match, reset the interval time and / or the detection time of the overcurrent protection module, and return to determine whether the interval time and the detection time match the preset potential time.

10. A display device, characterized in that, The display device includes: An array substrate gate driving circuit; and, The potential conversion circuit according to claim 9, and the clock output end of the potential conversion circuit is connected to the clock input end of the array substrate gate driving circuit in one-to-one correspondence.

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