Detection circuit, detection method and display device

Abstract

The application discloses a detection circuit, a detection method and a display device. In the detection circuit, a compensation module is configured to generate a compensation signal based on abnormal data of a display panel; a first end of a switch module is connected to the compensation module, and a second end of the switch module is connected to the display panel; a judgment module receives the abnormal data of the display panel, compares the abnormal data with a preset switching range, and generates a control signal; the judgment module is also connected to a control end of the switch module, and the control end of the switch module responds to the control signal to make the first end and the second end of the switch module conductive or disconnected; when the abnormal data meets the preset switching range, the generated control signal controls the switch module to maintain the current on-off state; when the abnormal data exceeds the preset switching range, the generated control signal controls the switch module to switch the current on-off state. The technical scheme of the application can reduce the frequent opening and closing of the compensation function, reduce the flicker of the display picture, and improve the display effect.

Description

[0001] This application is a divisional application of application number 202411091679.X, filed on August 9, 2024, and entitled “Detection Circuit, Detection Method, and Display Device”. Technical Field

[0002] The present application belongs to the field of display technology, and specifically relates to a detection circuit, a detection method and a display device. Background Art

[0003] In existing display screens, in order to solve image anomalies such as signal crosstalk and color deviation, a PDF (Pattern Defect Function) is used to change the polarity arrangement of liquid crystals for specific images, thereby improving the display effect of the image.

[0004] Before enabling the PDF function, it's usually necessary to first determine if the display screen's abnormalities meet the startup requirements. However, due to the instability of front-end data transmission, the transmitted display data can fluctuate, causing instability in the PDF's startup and shutdown states. This can lead to frequent activation and deactivation of the PDF function, resulting in flickering on the display screen and severely affecting the display quality. Summary of the Invention

[0005] The purpose of this application is to provide a detection circuit that can effectively reduce the frequent opening and closing of the PDF function, reduce the flickering of the display screen, and improve the display effect.

[0006] Other features and advantages of the present application will become apparent from the following detailed description, or may be learned in part by practice of the present application.

[0007] According to one aspect of an embodiment of the present application, the present application provides a detection circuit, the detection circuit comprising:

[0008] The compensation module generates a compensation signal based on abnormal data of the display panel;

[0009] a switch module, one end of which is connected to the compensation module, and the switch module is used to control the compensation module to output the compensation signal;

[0010] a judgment module, the judgment module receiving abnormal data of the display panel, comparing the abnormal data with a preset switching range, and generating a control signal, the judgment module being further connected to a control terminal of the switch module, the control terminal of the switch module being responsive to the control signal to turn the switch module on or off, so that the compensation module provides the compensation signal when the switch module is on;

[0011] Wherein, when the abnormal data meets the preset switching range, the generated control signal controls the switch module to maintain the current on-off state;

[0012] When the abnormal data exceeds the preset switching range, the generated control signal controls the switch module to switch the current on-off state.

[0013] In one aspect, the switch module includes a response switch, a first end of the response switch is connected to the compensation module, and a second end is connected to the display panel, and a control end of the response switch responds to the control signal to turn on or off the first end and the second end of the response switch.

[0014] In one aspect, the determination module includes a first comparator, a second comparator, a first OR gate, a first AND gate, a first control switch and a second control switch;

[0015] The positive input terminals of the first comparator and the second comparator receive the abnormal data, the negative input terminal of the first comparator receives a first preset value, and the negative input terminal of the second comparator receives a second preset value, the first preset value is greater than the second preset value, and the preset switching range includes the first preset value and the second preset value;

[0016] The output end of the first comparator is connected to the first OR gate and the first AND gate respectively, the output end of the second comparator is connected to the first OR gate and the first AND gate respectively, the output end of the first AND gate is connected to the input end of the first control switch, the output end of the first OR gate is connected to the input end of the second control switch, the output end of the first control switch and the output end of the second control switch are both connected to the control end of the response switch, the control end of the first control switch is connected to the output end of the second control switch, and the control end of the second control switch is connected to the input end of the first control switch;

[0017] The first control switch and the second control switch are both N-type MOS transistors, or the first control switch is a P-type MOS transistor and the second control switch is an N-type MOS transistor;

[0018] When the abnormal data is between the first preset value and the second preset value, the generated control signal controls the response switch to maintain the current on-off state;

[0019] When the abnormal data is greater than the first preset value, the generated control signal controls the response switch to switch from an off state to an on state.

[0020] In one aspect, the determination module includes a third comparator, a fourth comparator, a second OR gate, a second AND gate, a third control switch, and a fourth control switch;

[0021] The positive input terminals of the third comparator and the fourth comparator receive the abnormal data, the negative input terminal of the third comparator receives a third preset value, the negative input terminal of the fourth comparator receives a fourth preset value, the third preset value is greater than the fourth preset value, and the preset switching range includes the third preset value and the fourth preset value;

[0022] The output end of the third comparator is connected to the second OR gate and the second AND gate respectively, the output end of the fourth comparator is connected to the second OR gate and the second AND gate respectively, the output end of the second OR gate is connected to the input end of the third control switch, the output end of the second AND gate is connected to the input end of the fourth control switch, the output end of the third control switch and the output end of the fourth control switch are both connected to the control end of the response switch, the control end of the third control switch is connected to the output end of the fourth control switch, and the control end of the fourth control switch is connected to the input end of the third control switch;

[0023] The third control switch and the fourth control switch are both P-type MOS transistors, or the third control switch is a P-type MOS transistor and the fourth control switch is an N-type MOS transistor;

[0024] When the abnormal data is between the third preset value and the fourth preset value, the generated control signal controls the response switch to maintain the current on-off state;

[0025] When the abnormal data is less than the fourth preset value, the generated control signal controls the response switch to switch from the on state to the off state.

[0026] In one aspect, the judgment module includes a data comparison unit and a voltage conversion unit;

[0027] The data comparison unit is connected to the voltage conversion unit, receives the abnormal data, compares the abnormal data with the preset switching range and generates a comparison result, sends the comparison result to the voltage conversion unit, and converts the comparison result into a control signal that can be recognized by the switch module;

[0028] Alternatively, the voltage conversion unit is connected to the data comparison unit, the voltage conversion unit receives the abnormal data, converts the abnormal data into a voltage signal that can be recognized by the switch module, and sends the voltage signal to the data comparison unit, the data comparison unit compares the voltage signal with the preset switching range and generates a control signal.

[0029] In one aspect, the data comparison unit includes a timer, which is used to time the time interval between the fluctuations of the abnormal data, and the preset switching range includes a preset time, wherein the abnormal data meeting the preset switching range includes the time interval being less than the preset time, and the abnormal data exceeding the preset switching range includes the time interval being greater than or equal to the preset time.

[0030] In one aspect, the data comparison unit includes a counter, which is used to obtain the number of fluctuations of the abnormal data, and the preset switching range includes a preset number of times, wherein the abnormal data meeting the preset switching range includes the number of fluctuations being less than the preset number of times, and the abnormal data exceeding the preset switching range includes the number of fluctuations being greater than or equal to the preset number of times.

[0031] In one aspect, the data comparison unit includes a logic judge, which is used to obtain the fluctuation peak value of the abnormal data, and the preset switching range includes a hysteresis range, wherein the abnormal data meeting the preset switching range includes the fluctuation peak value being within the hysteresis range, and the abnormal data exceeding the preset switching range includes the fluctuation peak value being less than or equal to or greater than or equal to the hysteresis range.

[0032] In one aspect, the switch module includes a first response switch and a second response switch, wherein a first end of the first response switch is connected to the compensation module, and a second end thereof receives a high-level signal, so that the high-level signal is loaded to the compensation module when the first response switch is turned on;

[0033] The detection circuit also includes a second response switch, wherein a first end of the second response switch is connected to the compensation module, and a second end receives a low-level signal, so that when the second response switch is turned on, the low-level signal is loaded into the compensation module, and one of the first response switch and the second response switch is turned on, and the other is turned off.

[0034] In one aspect, the judgment module further includes a fifth comparator and a sixth comparator, and the switch module includes a first triode switch, a second triode switch, a third triode switch, a fourth triode switch, a fifth control switch, and a sixth control switch;

[0035] The positive input terminals of the fifth comparator and the sixth comparator receive the abnormal data, the negative input terminal of the fifth comparator receives a fifth preset value, the negative input terminal of the sixth comparator receives a sixth preset value, the fifth preset value is greater than the sixth preset value, and the preset switching range includes the fifth preset value and the sixth preset value.

[0036] The first terminal of the first triode switch is connected to a first node, and the second terminal is connected to a second node.

[0037] The first terminal of the second triode switch is connected to the first node, and the second terminal is connected to the second node.

[0038] The first terminal of the third triode switch is connected to the first node, and the second terminal is connected to the first terminal of the fourth triode switch.

[0039] The output terminals of the fifth comparator are respectively connected to the control terminals of the second triode switch and the fourth triode switch, the output terminals of the sixth comparator are respectively connected to the control terminals of the first triode switch and the third triode switch, the first node receives a high-level signal, the second node is connected to the first terminal of the fifth control switch, the second terminal of the fifth control switch is connected to the compensation module, the second terminal of the fourth triode switch is connected to the first terminal of the sixth control switch, the second terminal of the sixth control switch is connected to the control terminal of the fifth control switch and the compensation module, the control terminal of the sixth control switch is connected to the second node, the fifth control switch is a P-type MOS tube, and the sixth control switch is an N-type MOS tube.

[0040] In one aspect, the judging module further includes a seventh comparator and an eighth comparator, and the switch module includes a fifth triode switch, a sixth triode switch, a seventh triode switch, an eighth triode switch, a seventh control switch, and an eighth control switch.

[0041] The positive input terminals of the seventh comparator and the eighth comparator receive the abnormal data, the negative input terminal of the seventh comparator receives a seventh preset value, the negative input terminal of the eighth comparator receives an eighth preset value, the seventh preset value is greater than the eighth preset value, and the preset switching range includes the seventh preset value and the eighth preset value.

[0042] The first terminal of the fifth triode switch is connected to a third node, and the second terminal is connected to a fourth node.

[0043] The first terminal of the sixth triode switch is connected to the third node, and the second terminal is connected to the fourth node.

[0044] The first end of the seventh triode switch is connected to the third node, and the second end is connected to the first end of the eighth triode switch;

[0045] The output end of the seventh comparator is respectively connected to the control end of the sixth triode switch and the control end of the eighth triode switch, and the output end of the eighth comparator is respectively connected to the control end of the fifth triode switch and the control end of the seventh triode switch. The third node receives a high-level signal, the fourth node is connected to the first end of the seventh control switch, the second end of the seventh control switch is connected to the compensation module, the second end of the eighth control switch is respectively connected to the first end of the eighth control switch and the control end of the seventh triode switch, the second end of the eighth control switch is connected to the compensation module, and the control end of the eighth control switch is connected to the second end of the seventh control switch. The seventh control switch is an N-type MOS transistor, and the eighth control switch is a P-type MOS transistor.

[0046] In one aspect, the detection circuit includes a driving board and a control module, the compensation module and the control module are integrated on the driving board, and the control module is connected to the compensation module and the judgment module respectively;

[0047] The control module converts the abnormal data into the compensation signal and sends it to the compensation module;

[0048] The control module provides the pre-stored preset switching range to the judgment module.

[0049] In addition, in order to solve the above problem, the present application also provides a detection method, which is applied to a display panel, wherein the display panel is connected to a switch module;

[0050] The detection method comprises:

[0051] detecting abnormal data displayed by the display panel and generating a compensation signal based on the abnormal data;

[0052] Comparing the abnormal data with a preset switching range and generating a control signal, wherein a first end of the switch module receives the compensation signal, a second end of the switch module is connected to the display panel, a control end of the switch module receives the control signal, and the control end of the switch module responds to the control signal to turn the switch module on or off;

[0053] When the abnormal data meets the preset switching range, controlling the switch module to maintain the current on-off state based on the generated control signal;

[0054] When the abnormal data exceeds the preset switching range, the switch module is controlled to switch the current on-off state based on the generated control signal.

[0055] In one aspect, the display panel includes a plurality of light-emitting units distributed at intervals;

[0056] The step of detecting abnormal data displayed on the display panel includes:

[0057] Before the light-emitting unit is lit, detecting an abnormal signal loaded on the light-emitting unit, and accumulating the abnormal signals of a plurality of the light-emitting units to form the abnormal data; and / or

[0058] After the light-emitting unit is lit, feedback abnormalities of the light-emitting unit are detected, and a plurality of the feedback abnormalities are accumulated together to form the abnormality data.

[0059] In one aspect, the step of generating a compensation signal based on the abnormal data comprises:

[0060] The abnormal data is compared with a preset threshold, and a compensation signal is generated when the abnormal data is greater than or equal to the preset threshold.

[0061] In addition, in order to solve the above problems, the present application also provides a display device, which includes a display panel and a detection circuit as described above, the display panel includes a display area and a non-display area surrounding the display area, and the detection circuit is arranged in the non-display area.

[0062] In the present application, the judgment module can compare the abnormal data with the preset switching range. When the abnormal data meets the preset switching range, the generated control signal controls the switch module to maintain the current on-off state. At this time, the switch module does not switch the state, and the PDF signal can continue to act on the display panel, or continue to keep the PDF signal disconnected from the display panel. When the abnormal data exceeds the preset switching range, the generated control signal controls the switch module to switch the current on-off state. At this time, the switch module can switch the state from the on state to the off state, or from the off state to the on state. Therefore, through the setting of the judgment module in the present application, the frequent opening and closing of the PDF function can be reduced, the flicker of the display screen can be reduced, and the display effect can be improved.

[0063] It should be understood that the above general description and the following detailed description are merely exemplary and explanatory and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0064] The accompanying drawings are incorporated into and constitute a part of the specification, illustrate embodiments consistent with the present application, and together with the specification, are used to explain the principles of the present application. Obviously, the drawings described below are only some embodiments of the present application, and those skilled in the art can derive other drawings based on these drawings without inventive effort.

[0065] Figure 1 The structure diagram of an embodiment of the detection circuit of the present application is schematically shown.

[0066] Figure 2 The schematic diagram shows the structure of the response switch in the switch module of the detection circuit of the present application.

[0067] Figure 3 The schematic diagram shows the structure of the judgment module in the detection circuit of the present application.

[0068] Figure 4 The internal circuit structure diagram of the judgment module in this application is schematically shown.

[0069] Figure 5 Another structural diagram of the internal circuit of the judgment module in the present application is schematically shown.

[0070] Figure 6 The figure schematically shows a connection relationship diagram between the data comparison unit and the voltage conversion unit in the detection circuit of the present application.

[0071] Figure 7 The figure schematically shows another connection relationship diagram of the data comparison unit and the voltage conversion unit in the detection circuit of the present application.

[0072] Figure 8 The schematic diagram shows the structure of setting a timer in the detection circuit of the present application.

[0073] Figure 9 The schematic diagram shows the structure of the counter set in the detection circuit of the present application.

[0074] Figure 10 The schematic diagram shows the structure of the logic judgement device in the detection circuit of the present application.

[0075] Figure 11 The schematic diagram shows the structure of the detection circuit of the present application in which a timer, a counter and a logic judge are set simultaneously.

[0076] Figure 12 The schematic diagram shows the structure of the detection circuit of the present application, which is equipped with a driving board and a control module.

[0077] Figure 13The structure diagram of another embodiment of the detection circuit of the present application is schematically shown.

[0078] Figure 14 The schematic diagram shows the structure of a switch module in an embodiment of the detection circuit of the present application.

[0079] Figure 15 The schematic diagram shows the structure of another embodiment of the switch module in the detection circuit of the present application.

[0080] Figure 16 The following is a schematic diagram showing the process steps of the detection method of the present application.

[0081] Figure 17 The figure schematically shows the process steps for generating a compensation signal in the detection method of the present application.

[0082] Figure 18 The structural diagram of the display device of the present application is schematically shown.

[0083] The following are the descriptions of the reference numerals:

[0084] 100, switch module; 200, display panel; 300, compensation module; 400, judgment module; 500, drive board; 600, control module;

[0085] M0, response switch; M1, first response switch; M2, second response switch; 210, display area; 220, non-display area; 410, data comparison unit; 420, voltage conversion unit;

[0086] A1, first comparator; A2, second comparator; Y1, first OR gate; Y2, first AND gate; T1, first control switch; T2, second control switch; A3, third comparator; A4, fourth comparator; Y3, second OR gate; Y4, second AND gate; T3, third control switch; T4, fourth control switch;

[0087] A5, fifth comparator; A6, sixth comparator; Q1, first transistor switch; Q2, second transistor switch; Q3, third transistor switch; Q4, fourth transistor switch; T5, fifth control switch; T6, sixth control switch; P1, first node; P2, second node;

[0088] A7, seventh comparator; A8, eighth comparator; Q5, fifth triode switch; Q6, sixth triode switch; Q7, seventh triode switch; Q8, eighth triode switch; T7, seventh control switch; T8, eighth control switch; P3, third node; P4, fourth node. DETAILED DESCRIPTION

[0089] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this application will be thorough and complete and will fully convey the concepts of the example embodiments to those skilled in the art.

[0090] Example 1

[0091] See Figure 1 As shown, the present application provides a detection circuit, which includes: a switch module 100, a compensation module 300 and a judgment module 400.

[0092] The judgment module 400 is connected to the display panel 200 and is used to detect abnormal data displayed by the display panel 200. The display panel 200 includes multiple light-emitting units. During normal display, each light-emitting unit has a certain light-emitting area when emitting light, and the brightness of the light is grayscale. By detecting abnormal light-emitting areas and grayscale brightness in the display panel 200, abnormal data can be obtained. In other words, the abnormal data includes the light-emitting area and grayscale brightness.

[0093] The compensation module 300 provides a compensation signal generated based on the abnormal data; the compensation module 300 can be directly connected to the display panel 200, or it can be connected to the display panel 200 through other modules, so as to obtain the abnormal data of the display panel 200. Among them, the compensation module 300 can be understood as a PDF functional module, and the compensation module 300 can generate a PDF compensation signal. For example, in the abnormal data, when the abnormal luminous area reaches a certain value, or when the grayscale brightness of the light-emitting unit deviates greatly from the normal grayscale, the compensation module 300 starts to generate a compensation signal. The compensation signal can be used to compensate and repair the abnormal situation in the display panel 200, for example, by adjusting the luminous brightness and luminous area of ​​the corresponding light-emitting unit. For another example, the display panel 200 of the present application is a liquid crystal panel, and the adjustment of the luminous brightness and luminous area can be completed by adjusting the liquid crystal polarity arrangement of the corresponding light-emitting unit.

[0094] The first end of the switch module 100 is connected to the compensation module 300, and the second end is connected to the display panel 200; the first end of the switch module 100 can be understood as the signal input end, and the second end can be understood as the signal output end. Through the switch module 100, the compensation signal can be loaded onto the display panel 200.

[0095] The judgment module 400 is connected to the display panel 200. The judgment module 400 receives abnormal data from the display panel 200, compares the abnormal data with a preset switching range, and generates a control signal. The judgment module 400 is also connected to the control terminal of the switch module 100. The control terminal of the switch module 100 responds to the control signal to connect or disconnect the first and second terminals of the switch module 100. When the switch module is connected, the compensation module provides a compensation signal. The control terminal of the switch module 100 serves as the gate. When the first and second terminals of the switch module 100 are connected, the compensation signal is applied to the display panel 200 through the switch module 100. When the first and second terminals of the switch module 100 are disconnected, the compensation signal stops being applied, and the compensation module 300 is disconnected from the display panel 200.

[0096] When the abnormal data meets the preset switching range, the generated control signal controls the switch module 100 to maintain the current on / off state. The preset switching range can be a range value or a specific value. When the preset switching range is a range value, the abnormal data meeting the preset switching range can be understood as the abnormal data being within the preset fluctuation range. When the preset switching range is a specific value, the abnormal data meeting the preset switching range can be understood as the abnormal data being less than or greater than the preset switching range. Different settings can be used for different specific situations.

[0097] When the abnormal data exceeds the preset switching range, the generated control signal controls the switch module 100 to switch the current on / off state. When the preset switching range is a range of values, the abnormal data exceeding the preset switching range can be understood as the abnormal data not being within the preset fluctuation range. When the preset switching range is a specific value, the abnormal data exceeding the preset switching range can be understood as the abnormal data being less than or greater than the preset switching range. Different settings can be used for different specific situations.

[0098] In this embodiment, the judgment module 400 can compare the abnormal data with the preset switching range. When the abnormal data meets the preset switching range, the generated control signal controls the switch module 100 to maintain the current on-off state. At this time, the switch module 100 does not switch states, and the PDF signal can continue to act on the display panel 200, or continue to keep the PDF signal disconnected from the display panel 200. When the abnormal data exceeds the preset switching range, the generated control signal controls the switch module 100 to switch the current on-off state. At this time, the switch module 100 can switch states from the on state to the off state, or from the off state to the on state. Therefore, through the setting of the judgment module 400 in this application, the frequent opening and closing of the PDF function can be reduced, the flicker of the display screen can be reduced, and the display effect can be improved. Among them, the PDF signal is a compensation signal.

[0099] It can be further understood that, by setting the preset switching range, even if the abnormal data is unstable and fluctuates up and down, there is no preset switching range to buffer the fluctuation of the abnormal data, thereby reducing the sensitivity of the PDF signal.

[0100] See Figure 2 As shown, in one embodiment of the present application, the switch module includes a response switch, wherein the first end of the response switch is connected to the compensation module, and the second end is connected to the display panel. The control end of the response switch responds to a control signal to turn the first and second ends of the response switch on or off. By controlling the on and off of the response switch, the compensation module is controlled to provide a compensation signal to the display panel. When the response switch is on, the compensation signal is applied to the display panel; when the response switch is off, the compensation module stops providing the compensation signal to the compensation module. Generally, the first end is the source, the second end is the drain, and the control end is the gate.

[0101] See Figure 3 and Figure 4 As shown, in one embodiment of the present application, the judgment module 400 includes a first comparator A1, a second comparator A2, a first OR gate Y1, a first AND gate Y2, a first control switch T1 and a second control switch T2.

[0102] Specifically, the positive input terminals of the first comparator A1 and the second comparator A2 receive abnormal data, the negative input terminals of the first comparator A1 receive a first preset value, and the negative input terminals of the second comparator A2 receive a second preset value. The first preset value is greater than the second preset value, and the preset switching range includes the first preset value and the second preset value; that is, the preset switching range includes the range formed by the first preset value and the second preset value. The judgment module 400 can be provided with a first interface and a second interface. The first preset value can be pre-stored in the judgment module 400, or the size of the first preset value can be modified by transmitting through the first interface. Similarly, the second preset value can also be pre-stored in the judgment module 400, or modified through the second interface. The positive input terminals of the first comparator A1 and the second comparator A2 can be connected to the receiving terminal of the judgment module 400, and the receiving terminal is used to receive abnormal data.

[0103] The output of the first comparator A1 is connected to the first OR gate Y1 and the first AND gate Y2, respectively. The output of the second comparator A2 is connected to the first OR gate Y1 and the first AND gate Y2, respectively. The output of the first AND gate Y2 is connected to the input of the first control switch T1, and the output of the first OR gate Y1 is connected to the input of the second control switch T2. The output of the first control switch T1 and the output of the second control switch T2 are both connected to the control terminal of the response switch M0. The control terminal of the first control switch T1 is connected to the output terminal of the second control switch T2, and the control terminal of the second control switch T2 is connected to the input terminal of the first control switch T1. The output of the first control switch T1 and the output of the second control switch T2 can be understood as the output of the determination module 400, and the output of the determination module 400 is connected to the control terminal of the response switch M0.

[0104] The first control switch T1 and the second control switch T2 are both N-type MOS transistors, or the first control switch T1 is a P-type MOS transistor and the second control switch T2 is an N-type MOS transistor; MOS transistor (Metal-Oxide-Semiconductor Field-Effect Transistor) is also called Metal-Oxide-Semiconductor Field-Effect Transistor.

[0105] When the abnormal data is between the first preset value and the second preset value, the generated control signal controls the response switch M0 to maintain the current on-off state.

[0106] When the abnormal data is greater than the first preset value, the generated control signal controls the response switch M0 to switch from the off state to the on state.

[0107] When both the first control switch T1 and the second control switch T2 are N-type MOS transistors, the positive input terminal of the first comparator A1 receives abnormal data, which can also be actual data on the display screen. When the data at the positive input terminal is greater than the data at the negative input terminal, the output terminal outputs 1; when the data at the positive input terminal is less than the data at the negative input terminal, the output terminal outputs 0. Because the output terminal of the first control switch T1 and the output terminal of the second control switch T2 are both connected to the control terminal of the response switch M0, as long as either the first control switch T1 or the second control switch T2 outputs a high level, the response switch M0 can be turned on.

[0108] Assume the abnormal data is M, the first preset value is M1, and the second preset value is M2. In this case, M1>M2>M. The outputs of the first comparator A1 and the second comparator A2 are both 0. After passing through the first AND gate Y2, the output is 0, and after passing through the first OR gate Y1, the output is also 0. The second control switch T2 is disconnected, and the output terminal of the second control switch T2 is non-active. When the control terminal of the disconnected first control switch T1 is at a low level, the first control switch T1 is disconnected, and the first control switch T1 has no output. The control terminal acting on the response switch M0 is at a low level, and the response switch M0 is disconnected, disabling the PDF function.

[0109] When the abnormal data M lies between the first and second preset values, that is, when M1>M>M2, the first comparator A1 outputs 0, the second comparator A2 outputs 1, and after passing through the first AND gate Y2, the output is 0, and after passing through the first OR gate Y1, the output is 1. The control terminal of the second control switch T2 is then at 0, or a low level, and the second control switch T2 remains off, with no output from the output terminal of the second control switch T2. Similarly, the first control switch T1 is off, and there is no output from the first control switch T1. The control terminal acting on the response switch M0 is at a low level, the response switch M0 is off, and the PDF function is disabled.

[0110] When abnormal data M is greater than the first preset value, that is, when M>M1>M2, the output of first comparator A1 is 1, and the output of second comparator A2 is also 1. After passing through first OR gate Y1, the output is 1, and after passing through first AND gate Y2, the output is also 1. The control terminal of second control switch T2 is 1, i.e., a high level, and second control switch T2 is turned on, so second control switch T2 outputs 1. The control terminal of first control switch T1 is 1, i.e., a high level, and first control switch T1 is turned on. The output of first control switch T1 is 1, which acts on the control terminal of response switch M0, which is high, turning on response switch M0 and enabling the PDF function. The abnormal data, actual data, first preset value, and second preset value mentioned above can be the size of the luminous area or the luminous brightness.

[0111] It can be seen from this that the PDF function will not be turned on at will. A buffer range is formed by the first preset value and the second preset value. When the PDF function needs to be switched from the off state to the on state, the abnormal data needs to be large enough and greater than the first preset value before it is started.

[0112] In addition, when the first control switch T1 is a P-type MOS transistor and the second control switch T2 is an N-type MOS transistor, the first control switch T1 is turned on at a low level and the second control switch T2 is turned on at a high level.

[0113] At this point, M1>M2>M, and the outputs of the first comparator A1 and the second comparator A2 are both 0. After passing through the first AND gate Y2, the output is 0, and after passing through the first OR gate Y1, the output is also 0. The second control switch T2 is disconnected, and the output terminal of the second control switch T2 has no output. When the control terminal of the disconnected first control switch T1 is at a low level, the first control switch T1 is turned on, and the output of the first control switch T1 is 0. The control terminal acting on the response switch M0 is at a low level, and the response switch M0 is disconnected, disabling the PDF function.

[0114] When the abnormal data M lies between the first and second preset values, that is, when M1>M>M2, the first comparator A1 outputs 0, the second comparator A2 outputs 1, and after passing through the first AND gate Y2, the output is 0, and after passing through the first OR gate Y1, the output is 1. The control terminal of the second control switch T2 is then at 0, or a low level, and the second control switch T2 remains off, with no output from the output terminal of the second control switch T2. Consequently, the first control switch T1 is turned on, the output of the first control switch T1 is 0, the control terminal acting on the response switch M0 is at a low level, the response switch M0 is off, and the PDF function is disabled.

[0115] When the abnormal data M is greater than the first preset value (i.e., when M>M1>M2), the output of the first comparator A1 is 1, and the output of the second comparator A2 is also 1. After passing through the first OR gate Y1, the output is 1, and after passing through the first AND gate Y2, the output is also 1. The control terminal of the second control switch T2 is 1, i.e., high, and the second control switch T2 is turned on, so the second control switch T2 outputs 1. The control terminal of the first control switch T1 is 1, i.e., high, and the first control switch T1 is turned off, resulting in no output from the first control switch T1. The control terminal of the response switch M0 is high, turning on the response switch M0, and the PDF function is enabled. This ensures that the PDF function is not activated arbitrarily, but only when the abnormal data exceeds the first preset value.

[0116] See Figure 5 As shown, in another embodiment of the present application, the judgment module 400 includes a third comparator A3, a fourth comparator A4, a second OR gate Y3, a second AND gate Y4, a third control switch T3 and a fourth control switch T4.

[0117] The positive inputs of the third comparator A3 and the fourth comparator A4 receive abnormal data, the negative input of the third comparator A3 receives a third preset value, and the negative input of the fourth comparator A4 receives a fourth preset value. The third preset value is greater than the fourth preset value, and the preset switching range includes the third preset value and the fourth preset value. The preset switching range includes the range formed by the third preset value and the fourth preset value. The judgment module 400 may further include a third interface and a fourth interface. The third interface is used to modify the third preset value, and the fourth preset value can be modified via the fourth interface. For details, please refer to the first interface and the second interface.

[0118] The output end of the third comparator A3 is connected to the second OR gate Y3 and the second AND gate Y4 respectively. The output end of the fourth comparator A4 is connected to the second OR gate Y3 and the second AND gate Y4 respectively. The output end of the second OR gate Y3 is connected to the input end of the third control switch T3. The output end of the second AND gate Y4 is connected to the input end of the fourth control switch T4. The output end of the third control switch T3 and the output end of the fourth control switch T4 are both connected to the control end of the response switch M0. The control end of the third control switch T3 is connected to the output end of the fourth control switch T4, and the control end of the fourth control switch T4 is connected to the input end of the third control switch T3. It can also be seen that the third control switch T3 and the fourth control switch T4 can only control the response switch M0 to be disconnected when both output low levels.

[0119] The third control switch T3 and the fourth control switch T4 are both P-type MOS transistors, or the third control switch T3 is a P-type MOS transistor and the fourth control switch T4 is an N-type MOS transistor. The P-type MOS transistor is turned on at a low level and the N-type MOS transistor is turned on at a high level.

[0120] When the abnormal data is between the third preset value and the fourth preset value, the generated control signal controls the response switch M0 to maintain the current on-off state; when the abnormal data is less than the fourth preset value, the generated control signal controls the response switch M0 to switch from the on state to the off state.

[0121] For the third comparator A3 and the fourth comparator A4, when the positive end is greater than the negative end, 1 (ie, positive, high level) is output; when the positive end is less than the negative end, 0 (ie, negative, low level) is output.

[0122] The third control switch T3 and the fourth control switch T4 are both P-type MOS transistors. Assuming that the actual image data or abnormal data is M, at this time M>M1>M2, the output terminals of the third comparator A3 and the fourth comparator A4 are both 1, the output is 1 after passing through the second OR gate Y3, and the output is also 1 after passing through the second AND gate Y4. The control terminal of the fourth control switch T4 is at a high level, and the fourth control switch T4 is disconnected, so the fourth control switch T4 has no output; the control terminal of the third control switch T3 is at a low level, the third control switch T3 is turned on, the output of the third control switch T3 is 1, the response switch M0 remains in the on state, and the PDF also remains in the open state.

[0123] When M1>M>M2, the output of the third comparator A3 is 0, and the output of the fourth comparator A4 is 1. After passing through the second OR gate Y3, the output is 1, and after passing through the second AND gate Y4, the output is 0. The control terminal of the fourth control switch T4 is at a high level, causing the fourth control switch T4 to be off, resulting in no output from the fourth control switch T4. The control terminal of the third control switch T3 is at a low level, turning on the third control switch T3. The output of the third control switch T3 is 1, the response switch M0 remains on, and the PDF also remains open.

[0124] When M1>M2>M, the output of the third comparator A3 is 0, and the output of the fourth comparator A4 is 0. After passing through the second OR gate Y3, the output is 0, and after passing through the second AND gate Y4, the output is 0. The control terminal of the fourth control switch T4 is at a low level, turning on the fourth control switch T4. Therefore, the output of the fourth control switch T4 is 0. The control terminal of the third control switch T3 is at a low level, turning on the third control switch T3. The output of the third control switch T3 is 0, which acts on the control terminal of the response switch M0, turning off the response switch M0. The PDF function switches from the on state to the off state. Therefore, the third and fourth preset values ​​form a buffer range. When the PDF function needs to switch from the on state to the off state, the abnormal data must be sufficiently small, less than the fourth preset value.

[0125] Furthermore, when the third control switch T3 is a P-type MOS transistor and the fourth control switch T4 is an N-type MOS transistor, and M>M1>M2, the outputs of the third comparator A3 and the fourth comparator A4 are both 1. After passing through the second OR gate Y3, the output is 1, and after passing through the second AND gate Y4, the output is also 1. The control terminal of the fourth control switch T4 is at a high level, turning on the fourth control switch T4, so that the fourth control switch T4 outputs 1. The control terminal of the third control switch T3 is at a high level, turning off the third control switch T3, so that the third control switch T3 has no output. The control terminal of the response switch M0 is at a high level, so the response switch M0 remains on, and the PDF also remains open.

[0126] When M1>M>M2, the output of the third comparator A3 is 0, and the output of the fourth comparator A4 is 1. After passing through the second OR gate Y3, the output is 1, and after passing through the second AND gate Y4, the output is 0. The control terminal of the fourth control switch T4 is at a high level, and the fourth control switch T4 is turned on, so the fourth control switch T4 outputs 0. The control terminal of the third control switch T3 is at a low level, and the third control switch T3 is turned on, and the third control switch T3 outputs 1. The control terminal of the response switch M0 is at a high level, and the response switch M0 remains turned on, and the PDF also remains in the open state.

[0127] When M1>M2>M, the output of the third comparator A3 is 0, and the output of the fourth comparator A4 is 0. After passing through the second OR gate Y3, the output is 0, and after passing through the second AND gate Y4, the output is 0. The control terminal of the fourth control switch T4 is at a low level, and the fourth control switch T4 is off, resulting in no output from the fourth control switch T4. The control terminal of the third control switch T3 is at a low level, and the third control switch T3 is on, and the output of the third control switch T3 is 0. As a result, the control terminal of the response switch M0 is at a low level, and the response switch M0 switches from on to off, and the PDF also switches from on to off. Similarly, the abnormal data must be sufficiently small, less than the fourth preset value, for the function to be closed.

[0128] See Figure 6 As shown, in one embodiment of the present application, the judgment module 400 includes a data comparison unit 410 and a voltage conversion unit 420. The data comparison unit 410 can compare abnormal data with a preset switching range, and the voltage conversion unit 420 can convert the received signal into a signal that can be recognized by the response switch M0, ensuring that the response switch M0 can be smoothly turned on or off. The response switch M0 can be a MOS transistor, and the response switch M0 can be a P-type MOS transistor or an N-type MOS transistor.

[0129] Regarding the connection positions of the data comparison unit 410 and the voltage conversion unit 420 , the present application provides at least two situations.

[0130] See again Figure 6 As shown, in the first connection position, data comparison unit 410 is connected to voltage conversion unit 420. Data comparison unit 410 compares the abnormal data with the preset switching range and generates a comparison result. Data comparison unit 410 sends the comparison result to voltage conversion unit 420, which converts the comparison result into a control signal that can be recognized by response switch M0. Data comparison unit 410 first receives the abnormal data and compares the abnormal data with the preset switching range. Because the comparison result may include the luminous area and grayscale brightness, two types of data that response switch M0 cannot recognize, the voltage conversion module can convert the abnormal data into a control signal that can be recognized by response switch M0.

[0131] See Figure 7As shown, the second connection position case is that the voltage conversion unit 420 is connected to the data comparison unit 410, the voltage conversion unit 420 converts the abnormal data into a voltage signal recognizable by the response switch M0, and sends the voltage signal to the data comparison unit 410, the data comparison unit 410 compares the voltage signal with the preset switching range and generates a control signal. The voltage conversion unit 420 first receives the abnormal data, first completes the conversion of the abnormal data, and then compares the converted voltage signal with the preset switching range through the data comparison unit 410. The first connection position case and the second connection position case output the same control signal, which can control the response switch M0. Among them, the preset switching range data types of the first connection position case and the second connection position case are different, the preset switching range in the first connection position case is the same data type as the area or gray scale, and the preset switching range in the second connection position case is the same data type as the voltage.

[0132] Referring to Figure 8 As shown, in an embodiment of the present application, the data comparison unit 410 includes a timer, and the timer is used to time the time interval between fluctuations of the abnormal data. The preset switching range includes a preset time, wherein the abnormal data meeting the preset switching range includes a time interval less than the preset time, and the abnormal data exceeding the preset switching range includes a time interval greater than or equal to the preset time. The abnormal data is unstable and fluctuates up and down to form multiple waveforms. The time between adjacent waveforms is the time interval. If the time interval is less than the preset time, it means that the abnormal data is normally fluctuating up and down and is not switching state, and at this time the on-off state of the response switch M0 is maintained. If the time interval is greater than or equal to the preset time, it means that the fluctuation of the abnormal data up and down belongs to the fluctuation of the switching state, and at this time the response switch M0 is controlled to switch the on-off state. The preset time can be stored in the timer or provided by other functional modules to the timer.

[0133] Referring to Figure 9 As shown, in an embodiment of the present application, the data comparison unit 410 includes a counter, and the counter is used to obtain the number of fluctuations of the abnormal data. The preset switching range includes a preset number, wherein the abnormal data meeting the preset switching range includes a fluctuation number less than the preset number, and the abnormal data exceeding the preset switching range includes a fluctuation number greater than or equal to the preset number. If the number of fluctuations of the abnormal data is less than the preset number, it means that the fluctuation of the abnormal data belongs to the fluctuation within the normal range and has no tendency to change the on-off state of the response switch M0. If the number of fluctuations of the abnormal data is greater than or equal to the preset number, it means that the abnormal data needs to complete the on-off control of the response switch M0, and the tendency to change the on-off state of the response switch M0 is obvious, and at this time the fluctuation of the abnormal data can be considered as normal control switching. The preset number can be stored in the counter or provided by other functional modules to the counter.

[0134] See Figure 10 As shown, in one embodiment of the present application, the data comparison unit 410 includes a logic judge, which is used to obtain the fluctuation peak value of the abnormal data. The preset switching range includes a hysteresis range, wherein the abnormal data meets the preset switching range and includes the fluctuation peak value being within the hysteresis range, and the abnormal data exceeds the preset switching range and includes the fluctuation peak value being less than or equal to or greater than the hysteresis range. The fluctuation peak value is within the hysteresis range, indicating that the abnormal data is a normal fluctuation. The fluctuation peak value is less than or equal to or greater than the hysteresis range, indicating that the fluctuation of the abnormal data is large and there is a tendency to change the on-off state of the current response switch M0. The hysteresis range can be stored in the logic judge, or it can be a hysteresis range provided to the logic judge by other functional modules.

[0135] See Figure 11 As shown, it should be noted that, in the present application, the data comparison unit 410 may include one of a timer, a counter and a logic judge, or may include two or all three. That is to say, the timer, the counter and the logic judge can be used in combination in pairs, or the three devices can function simultaneously. For example, when the timer, the counter and the logic judge exist at the same time, the abnormal data needs to simultaneously meet the conditions that the time interval is less than the preset time, the number of fluctuations is less than the preset number of times, or the peak value of the fluctuation is within the hysteresis range, in order to maintain the on-off state of the response switch M0. The response switch M0 can be controlled to switch between on and off states only when the abnormal data needs to simultaneously meet the conditions that the time interval is greater than or equal to the preset time, the number of fluctuations is greater than or equal to the preset number of times, or the peak value of the fluctuation is greater than or equal to the hysteresis range.

[0136] See Figure 13 As shown, in one embodiment of the present application, the switch module includes a first response switch M1 and a second response switch M2. The first end of the first response switch M1 is connected to the compensation module, and the second end receives a high-level signal. When the first response switch M1 is turned on, the high-level signal is applied to the compensation module. The detection circuit also includes a second response switch M2. The first end of the second response switch M2 is connected to the compensation module, and the second end receives a low-level signal. When the second response switch M2 is turned on, the low-level signal is applied to the compensation module. One of the first response switch M1 and the second response switch M2 is turned on, and the other is turned off. The compensation module fails when a low-level signal is applied, and operates normally when a high-level signal is applied. As can be seen, the switch module can be set between the display panel and the compensation module to control the connection and disconnection of the circuit between the display panel and the compensation module. In addition, the switch module can also be set between the power supply end and the compensation module. The power supply end provides a high-level signal and a low-level signal respectively. The voltage applied to the compensation module is controlled by the switch module, thereby controlling the activation of the compensation module.

[0137] See Figure 14 As shown, in one embodiment of the present application, the judgment module further includes a fifth comparator A5 and a sixth comparator A6, and the switch module includes a first triode switch Q1, a second triode switch Q2, a third triode switch Q3, a fourth triode switch Q4, a fifth control switch T5, and a sixth control switch T6; the signal output is completed by the fifth comparator A5 and the sixth comparator A6 in cooperation with the first triode switch Q1, the second triode switch Q2, the third triode switch Q3, and the fourth triode switch Q4.

[0138] The positive input terminals of the fifth comparator A5 and the sixth comparator A6 receive abnormal data, the negative input terminal of the fifth comparator A5 receives a fifth preset value, the negative input terminal of the sixth comparator A6 receives a sixth preset value, the fifth preset value is greater than the sixth preset value, and the preset switching range includes the fifth preset value and the sixth preset value.

[0139] The first end of the first transistor switch Q1 is connected to the first node P1, and the second end is connected to the second node P2. The first end of the second transistor switch Q2 is connected to the first node P1, and the second end is connected to the second node P2. Therefore, the first transistor switch Q1 and the second transistor switch Q2 are connected in parallel. For a transistor, the first end generally refers to the collector, the second end refers to the emitter, and the control end refers to the base.

[0140] A first end of the third transistor switch Q3 is connected to the first node P1 , and a second end is connected to a first end of the fourth transistor switch Q4 ; the third transistor switch Q3 and the fourth transistor switch Q4 are connected in series.

[0141] The output end of the fifth comparator A5 is connected to the control end of the second triode switch Q2 and the control end of the fourth triode switch Q4, respectively. The output end of the sixth comparator A6 is connected to the control end of the first triode switch Q1 and the control end of the third triode switch Q3, respectively. A first node P1 receives a high-level signal. A second node P2 is connected to a first end of a fifth control switch T5. A second end of the fifth control switch T5 is connected to the compensation module. A second end of the fourth triode switch Q4 is connected to a first end of a sixth control switch T6. A second end of the sixth control switch T6 is connected to the control end of the fifth control switch T5 and the compensation module. The control end of the sixth control switch T6 is connected to the second node P2. The fifth control switch T5 and the sixth control switch T6 are P-type MOS transistors.

[0142] For example, when the abnormal data is greater than the fifth preset value, the fifth comparator A5 outputs a 1, and the sixth comparator A6 outputs a 0. The 1 output by the fifth comparator A5 and the 0 output by the sixth comparator A6 merely represent the relative magnitudes of the output control signals. The first transistor switch Q1, the second transistor switch Q2, the third transistor switch Q3, and the fourth transistor switch Q4 are all turned on. The control terminal of the sixth control switch T6 receives a high level, and the sixth control switch T6 is turned off. The control terminal of the fifth control switch T5 receives a 0, and the fifth control switch T5 is turned on. The high-level signal passes through the fifth control switch T5 and acts on the compensation module.

[0143] When the abnormal data is between the fifth preset value and the sixth preset value, the fifth comparator A5 outputs 0, the sixth comparator A6 outputs 0, the first transistor switch Q1 and the third transistor switch Q3 are turned on, the second transistor switch Q2 and the fourth transistor switch Q4 are turned off, the high-level signal acts on the second node P2 through the first transistor switch Q1, the control end of the sixth control switch T6 receives the high level, the sixth control switch T6 is turned off, the control end of the fifth control switch T5 receives 0, the fifth control switch T5 is turned on, and the high-level signal acts on the compensation module through the fifth control switch T5.

[0144] When the abnormal data is less than the sixth preset value, the fifth comparator A5 outputs a 0, and the sixth comparator A6 outputs a 1. The first transistor switch Q1, the second transistor switch Q2, the third transistor switch Q3, and the fourth transistor switch Q4 are all disconnected, preventing high-level signals from passing through the switch module. The compensation module switches to a disabled state. More specifically, the first transistor switch Q1 and the third transistor switch Q3 are NPN transistors, while the second transistor switch Q2 and the fourth transistor switch Q4 are PNP transistors. It should be noted that the fifth comparator A5 and the sixth comparator A6 are configured to provide different output signals under different conditions, thereby controlling the conduction or disconnection of the second transistor switch Q2 and the fourth transistor switch Q4, and the conduction or disconnection of the first transistor switch Q1 and the third transistor switch Q3, respectively. For a transistor to conduct, a voltage comparison between the emitter and base is generally required. The emitter voltage can be adjusted by setting a resistor or using a voltage divider.

[0145] It can be seen from this that in this embodiment, a hysteresis interval is formed, and the compensation module is in a failure state only when the abnormal signal is lower than the sixth preset value of the hysteresis interval.

[0146] See Figure 15As shown, in one embodiment of the present application, the judgment module further includes a seventh comparator A7 and an eighth comparator A8, and the switch module includes a fifth triode switch Q5, a sixth triode switch Q6, a seventh triode switch Q7, an eighth triode switch Q8, a seventh control switch T7, and an eighth control switch T8; the positive input terminals of the seventh comparator A7 and the eighth comparator A8 receive abnormal data, the negative input terminal of the seventh comparator A7 receives a seventh preset value, and the negative input terminal of the eighth comparator A8 receives an eighth preset value, the seventh preset value is greater than the eighth preset value, and the preset switching range includes the seventh preset value and the eighth preset value.

[0147] A first end of the fifth transistor switch Q5 is connected to the third node P3, and a second end is connected to the fourth node P4; a first end of the sixth transistor switch Q6 is connected to the third node P3, and a second end is connected to the fourth node P4; thus, it can be seen that the fifth transistor switch Q5 and the sixth transistor switch Q6 are connected in parallel.

[0148] A first end of the seventh triode switch Q7 is connected to the third node P3, and a second end is connected to a first end of the eighth triode switch Q8; the seventh triode switch Q7 and the eighth triode switch Q8 are connected in series.

[0149] An output end of the seventh comparator A7 is connected to the control end of the sixth triode switch Q6 and the control end of the eighth triode switch Q8, respectively. An output end of the eighth comparator A8 is connected to the control end of the fifth triode switch Q5 and the control end of the seventh triode switch Q7, respectively. A third node P3 receives a high-level signal. A fourth node P4 is connected to a first end of a seventh control switch T7. A second end of the seventh control switch T7 is connected to the compensation module. A second end of the eighth triode switch Q8 is connected to the first end of the eighth control switch T8 and the control end of the seventh triode switch Q7, respectively. A second end of the eighth control switch T8 is connected to the compensation module. A control end of the eighth control switch T8 is connected to the second end of the seventh control switch T7. The seventh control switch T7 is an N-type MOS transistor, and the eighth control switch T8 is a P-type MOS transistor.

[0150] For example, when the abnormal data is less than the eighth preset value, the seventh comparator A7 outputs 0, and the eighth comparator A8 outputs 1. The fifth transistor switch Q5, the sixth transistor switch Q6, the seventh transistor switch Q7, and the eighth transistor switch Q8 are all turned off. High-level signals cannot pass through the switch module, and the compensation module remains in a disabled state.

[0151] When the abnormal data is between the seventh preset value and the eighth preset value, the seventh comparator A7 outputs 0, and the eighth comparator A8 outputs 0. The control ends of the sixth transistor switch Q6 and the eighth transistor switch Q8 receive 0, and the sixth transistor switch Q6 and the eighth transistor switch Q8 are turned off. The control end of the fifth transistor switch Q5 and the seventh transistor switch Q7 receives 0, but the fifth transistor switch Q5 and the seventh transistor switch Q7 are turned on, and the high-level signal acts on the fourth node P4 through the fifth transistor switch Q5. The control end of the seventh control switch T7 receives 0, and the seventh control switch T7 is turned off. Since the seventh control switch T7 is turned off, the control end of the eighth control switch T8 receives 0, the eighth control switch T8 is turned on, and the voltage acting on the compensation module is also a low-level signal, so the compensation module remains in an invalid state.

[0152] When the abnormal data is greater than the seventh preset value, the seventh comparator A7 outputs 1, and the eighth comparator A8 outputs 0. The fifth transistor switch Q5, the sixth transistor switch Q6, the seventh transistor switch Q7, and the eighth transistor switch Q8 are all turned on, the control end of the seventh control switch T7 receives 1, that is, a high-level signal, and the seventh control switch T7 is turned on. The high-level signal acts on the compensation module through the seventh control switch T7, and the compensation module plays a compensating role. Among them, the control end of the eighth transistor switch Q8 receives a high level, and the eighth transistor switch Q8 is turned off.

[0153] More specifically, the fifth transistor switch Q5 and the seventh transistor switch Q7 are NPN type transistors, and the sixth transistor switch Q6 and the eighth transistor switch Q8 are PNP type transistors. It should be noted that the seventh comparator A7 and the eighth comparator A8 are used to provide different output signals under different conditions, thereby respectively controlling the conduction or turn-off of the sixth transistor switch Q6 and the eighth transistor switch Q8, and the conduction or turn-off of the sixth transistor switch Q6 and the eighth transistor switch Q8. Similarly, in the embodiment, for the conduction of the transistor, the voltage between the emitter and the base is generally compared, and the voltage of the emitter can be adjusted by setting a resistor or a module capable of voltage division.

[0154] In short, the above two embodiments are realized by the comparators outputting different signals and then controlling transistors of different types to realize the AND gate and the OR gate. For Figure 14 , the OR gate is realized by the parallel connection of the first transistor switch Q1 and the second transistor switch Q2, and the AND gate is realized by the series connection of the third transistor switch Q3 and the fourth transistor switch Q4. For Figure 15 , the OR gate is realized by the parallel connection of the fifth transistor switch Q5 and the sixth transistor switch Q6, and the AND gate is realized by the series connection of the seventh transistor switch Q7 and the eighth transistor switch Q8.

[0155] It can be seen from this that in this embodiment, a hysteresis interval is also formed, and the compensation module switches to the working state only when the abnormal signal is higher than the seventh preset value of the hysteresis interval.

[0156] See Figure 12 As shown, in another embodiment of the present application, the detection circuit includes a driving board 500 and a control module 600, the compensation module 300 and the control module 600 are integrated on the driving board 500, and the control module 600 is respectively connected to the compensation module 300 and the judgment module 400; by integrating the compensation module 300 and the control module 600, space can be saved, and the control module 600 can be understood as a control chip.

[0157] The control module 600 converts the abnormal data into a compensation signal and sends it to the compensation module 300. The control module 600 also provides the pre-stored preset switching range to the judgment module 400. The preset switching range can be set by the control module 600. In addition, the control module 600 can also control the judgment module 400, for example, outputting a logical comparison instruction to the judgment module 400.

[0158] Example 2

[0159] See Figure 16 As shown, the present application further provides a detection method, which is applied to a display panel 200 , and the display panel 200 is connected to a switch module 100 .

[0160] Detection methods include:

[0161] Step S10, detecting abnormal data displayed by the display panel 200 and generating a compensation signal based on the abnormal data; the display panel 200 includes a plurality of light-emitting units. During normal display, each light-emitting unit has a certain light-emitting area when emitting light, and the brightness of the light is grayscale. By detecting the abnormal light-emitting area and grayscale brightness in the display panel 200, the light-emitting area and grayscale brightness of the abnormal light-emitting can be obtained. These light-emitting units need to be repaired and compensated, thereby generating a corresponding compensation signal based on the abnormal data. Specifically, the adjustment and compensation of the light-emitting brightness and light-emitting area can be achieved by adjusting the liquid crystal polarity arrangement of the corresponding light-emitting unit.

[0162] Step S20 compares the abnormal data with a preset switching range and generates a control signal. The first end of the switch module 100 receives the compensation signal, the second end of the switch module 100 is connected to the display panel 200, and the control end of the switch module 100 receives the control signal. The control end of the switch module responds to the control signal, turning the switch module on or off. For example, the input end of the switch module 100 receives the compensation signal, and the output end of the switch module 100 applies the compensation signal to the display panel 200. The gate of the switch module 100 responds to the control signal, which can be a high level or a low level. The switch module 100 can respond to a high level, with the first and second ends conducting; or respond to a low level, with the first and second ends disconnected. Alternatively, the switch module 100 can respond to a high level, with the first and second ends disconnected; or respond to a low level, with the first and second ends conducting.

[0163] In step S30, when the abnormal data meets the preset switching range, the switch module 100 is controlled to maintain the current on-off state based on the generated control signal; the preset switching range can be understood as a buffer zone. When the abnormal data meets the preset switching range, it means that the fluctuation of the abnormal data is a normal fluctuation, and there is no tendency to control the switch module 100 to switch the on-off state.

[0164] Step S40: When the abnormal data exceeds the preset switching range, the switch module 100 is controlled to switch the current on / off state based on the generated control signal. When the abnormal data exceeds the preset switching range, it indicates that the fluctuation of the abnormal data is abnormal, and it is necessary to control the switch module 100 to switch the current on / off state.

[0165] In the detection method of this embodiment, the abnormal data is compared with a preset switching range. When the abnormal data meets the preset switching range, the generated control signal controls the switch module 100 to maintain the current on-off state. At this time, the switch module 100 does not switch states, and the PDF signal can continue to act on the display panel 200, or continue to keep the PDF signal disconnected from the display panel 200. When the abnormal data exceeds the preset switching range, the generated control signal controls the switch module 100 to switch the current on-off state. At this time, the switch module 100 can switch states from the on state to the off state, or from the off state to the on state. Therefore, the detection method of this application can reduce the frequent opening and closing of the PDF function, reduce the flickering of the display screen, and improve the display effect.

[0166] See Figure 17 As shown, in one embodiment of the present application, the display panel 200 includes a plurality of light-emitting units distributed at intervals, and the light-emitting units can be arranged in a matrix.

[0167] The step of detecting abnormal data displayed on the display panel 200 includes:

[0168] In step S101, before a light-emitting unit is illuminated, abnormal signals applied to the light-emitting unit are detected. The abnormal signals from multiple light-emitting units are accumulated to form abnormal data. For example, the current or voltage supplied to the light-emitting unit can be detected to determine whether the light-emitting unit's display is abnormal. The abnormal signal can be the light-emitting area or grayscale brightness. Step S101 allows for the prediction of abnormal data in advance.

[0169] In step S102, after the light-emitting unit is turned on, abnormal feedback from the light-emitting unit is detected and multiple abnormal feedbacks are accumulated to form abnormality data. For example, the light-emitting area or grayscale brightness of the light-emitting unit after it is turned on can be collected to determine whether the corresponding light-emitting unit is abnormal, thereby obtaining abnormality data of the display panel 200. Through post-detection in step S102, abnormal conditions of the display panel 200 can be more accurately determined.

[0170] Step S101 and step S102 may be performed on a case-by-case basis, or both steps may be performed simultaneously. When both steps are performed simultaneously, the abnormal data includes both abnormal signals before and after the light-emitting unit is illuminated. The abnormal data thus generated is richer in content and can more accurately reflect abnormal conditions of the display panel 200.

[0171] See again Figure 13 As shown, in one embodiment of the present application, the step of generating a compensation signal based on abnormal data includes:

[0172] In step S110, the abnormal data is compared with a preset threshold. If the abnormal data is greater than or equal to the preset threshold, a compensation signal is generated. The preset threshold can be an area ratio, such as the ratio of the area of ​​the abnormal light emitting area to the area of ​​the display area 210 of the display panel 200. The preset threshold can also be a grayscale value. For example, the grayscale displayed by the light-emitting unit is compared with the grayscale value of the preset threshold. If the grayscale value is greater than the grayscale value, the light-emitting unit needs to compensate, thereby generating a compensation signal.

[0173] Example 3

[0174] See Figure 18 As shown, the present application also provides a display device, comprising a display panel 200 and the detection circuit described above. The display panel 200 comprises a display area 210 and a non-display area 220 surrounding the display area 210. The detection circuit is disposed in the non-display area 220. The display area 210 is used to display an image. Placing the detection circuit in the non-display area 220 can avoid affecting the normal display of the display panel 200.

[0175] The specific implementation and beneficial effects of the display device are described in the above description of the detection circuit and will not be repeated here.

[0176] Those skilled in the art will readily appreciate other embodiments of the present invention after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present invention that follow the general principles of this application and include common knowledge or customary techniques in the art that are not disclosed herein.

[0177] It should be understood that the present application is not limited to the exact structures described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

1. A detection circuit, characterized in that: The detection circuit includes: a compensation module, wherein the compensation module generates a compensation signal based on abnormal data of the display panel; a switch module, one end of which is connected to the compensation module, and the switch module is used to control the compensation module to output the compensation signal; a judgment module, the judgment module receiving abnormal data of the display panel, comparing the abnormal data with a preset switching range, and generating a control signal, the judgment module being further connected to a control terminal of the switch module, the control terminal of the switch module being responsive to the control signal to turn the switch module on or off, so that the compensation module provides the compensation signal when the switch module is on; Wherein, when the abnormal data meets the preset switching range, the generated control signal controls the switch module to maintain the current on-off state; When the abnormal data exceeds the preset switching range, the generated control signal controls the switch module to switch the current on-off state; The switch module includes a response switch, a first end of the response switch is connected to the compensation module, a second end is connected to the display panel, and a control end of the response switch responds to the control signal to connect or disconnect the first end and the second end of the response switch; The judgment module includes a first comparator, a second comparator, a first OR gate, a first AND gate, a first control switch and a second control switch; The positive input terminals of the first comparator and the second comparator receive the abnormal data, the negative input terminal of the first comparator receives a first preset value, and the negative input terminal of the second comparator receives a second preset value, the first preset value is greater than the second preset value, and the preset switching range includes the first preset value and the second preset value; The output end of the first comparator is connected to the first OR gate and the first AND gate respectively, the output end of the second comparator is connected to the first OR gate and the first AND gate respectively, the output end of the first AND gate is connected to the input end of the first control switch, the output end of the first OR gate is connected to the input end of the second control switch, the output end of the first control switch and the output end of the second control switch are both connected to the control end of the response switch, the control end of the first control switch is connected to the output end of the second control switch, and the control end of the second control switch is connected to the input end of the first control switch; The first control switch and the second control switch are both N-type MOS transistors, or the first control switch is a P-type MOS transistor and the second control switch is an N-type MOS transistor; When the abnormal data is between the first preset value and the second preset value, the generated control signal controls the response switch to maintain the current on-off state; When the abnormal data is greater than the first preset value, the generated control signal controls the response switch to switch from an off state to an on state.

2. A detection circuit, characterized in that: The detection circuit includes: a compensation module, wherein the compensation module generates a compensation signal based on abnormal data of the display panel; a switch module, one end of which is connected to the compensation module, and the switch module is used to control the compensation module to output the compensation signal; a judgment module, the judgment module receiving abnormal data of the display panel, comparing the abnormal data with a preset switching range, and generating a control signal, the judgment module being further connected to a control terminal of the switch module, the control terminal of the switch module being responsive to the control signal to turn the switch module on or off, so that the compensation module provides the compensation signal when the switch module is on; Wherein, when the abnormal data meets the preset switching range, the generated control signal controls the switch module to maintain the current on-off state; When the abnormal data exceeds the preset switching range, the generated control signal controls the switch module to switch the current on-off state; The switch module includes a response switch, a first end of the response switch is connected to the compensation module, a second end is connected to the display panel, and a control end of the response switch responds to the control signal to connect or disconnect the first end and the second end of the response switch; The judgment module includes a third comparator, a fourth comparator, a second OR gate, a second AND gate, a third control switch and a fourth control switch; The positive input terminals of the third comparator and the fourth comparator receive the abnormal data, the negative input terminal of the third comparator receives a third preset value, the negative input terminal of the fourth comparator receives a fourth preset value, the third preset value is greater than the fourth preset value, and the preset switching range includes the third preset value and the fourth preset value; The output end of the third comparator is connected to the second OR gate and the second AND gate respectively, the output end of the fourth comparator is connected to the second OR gate and the second AND gate respectively, the output end of the second OR gate is connected to the input end of the third control switch, the output end of the second AND gate is connected to the input end of the fourth control switch, the output end of the third control switch and the output end of the fourth control switch are both connected to the control end of the response switch, the control end of the third control switch is connected to the output end of the fourth control switch, and the control end of the fourth control switch is connected to the input end of the third control switch; The third control switch and the fourth control switch are both P-type MOS transistors, or the third control switch is a P-type MOS transistor and the fourth control switch is an N-type MOS transistor; When the abnormal data is between the third preset value and the fourth preset value, the generated control signal controls the response switch to maintain the current on-off state; When the abnormal data is less than the fourth preset value, the generated control signal controls the response switch to switch from the on state to the off state.

3. The detection circuit according to claim 1 or 2, characterized in that: The detection circuit includes a driving board and a control module, the compensation module and the control module are integrated on the driving board, and the control module is connected to the compensation module and the judgment module respectively; The control module converts the abnormal data into the compensation signal and sends it to the compensation module; The control module provides the pre-stored preset switching range to the judgment module.

4. A detection method, characterized in that: The detection method is applied to the detection circuit according to any one of claims 1 to 3, wherein the detection circuit is used to compensate for the image of a display panel, and the display panel is connected to the switch module; The detection method comprises: detecting abnormal data displayed by the display panel and generating a compensation signal based on the abnormal data; Comparing the abnormal data with a preset switching range and generating a control signal, wherein one end of the switch module receives the compensation signal, the control end of the switch module receives the control signal, and the control end of the switch module responds to the control signal to turn the switch module on or off; When the abnormal data meets the preset switching range, controlling the switch module to maintain the current on-off state based on the generated control signal; When the abnormal data exceeds the preset switching range, the switch module is controlled to switch the current on-off state based on the generated control signal.

5. The detection method according to claim 4, characterized in that: The display panel includes a plurality of light-emitting units distributed at intervals; The step of detecting abnormal data displayed on the display panel includes: Before the light-emitting unit is lit, detecting an abnormal signal loaded on the light-emitting unit, and accumulating the abnormal signals of a plurality of the light-emitting units to form the abnormal data; and / or After the light-emitting unit is lit, feedback abnormalities of the light-emitting unit are detected, and a plurality of the feedback abnormalities are accumulated together to form the abnormality data.

6. The detection method according to claim 4, characterized in that: The step of generating a compensation signal based on the abnormal data comprises: The abnormal data is compared with a preset threshold, and a compensation signal is generated when the abnormal data is greater than or equal to the preset threshold.

7. A display device, characterized in that: The display device includes a display panel and the detection circuit according to any one of claims 1 to 3, the display panel includes a display area and a non-display area surrounding the display area, and the detection circuit is disposed in the non-display area.

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