Control circuit and display device

Abstract

The invention discloses a control circuit and a display device. The control circuit is used for performing compensation control on a picture of the display panel, the control circuit comprises a compensation module, a repair module and a detection module, and the compensation module receives display data for driving the display panel and is started based on the display data so as to provide compensation data for the display panel before the picture is displayed; the restoration module receives feedback data of picture display of the display panel and is started based on the feedback data so as to provide restoration data for the display panel after picture display; the detection module receives display data for driving the display panel, determines an abnormal range of the abnormal picture based on the display data, and controls the repair module and / or the compensation module to start according to the abnormal range. According to the technical scheme, the situation of excessive repair compensation can be reduced, resource waste is reduced, and power consumption is reduced.

Description

Technical Field

[0001] The present application belongs to the field of display technology, and specifically relates to a control circuit and a display device. Background Art

[0002] In existing display products, as the refresh rate of the product continues to increase, the in-plane crosstalk of the display panel becomes more and more serious. To this end, software and hardware measures are usually used to repair and compensate the display image.

[0003] However, during the execution of software and hardware measures, it is difficult to repair and compensate for image anomalies in a targeted manner, and excessive repair and compensation often occurs, resulting in a serious waste of resources and increased power consumption. Summary of the invention

[0004] The purpose of the present application is to provide a control circuit that can effectively reduce the situation of excessive repair compensation, reduce resource waste, and reduce power consumption.

[0005] Other features and advantages of the present application will become apparent from the following detailed description, or may be learned in part by the practice of the present application.

[0006] According to one aspect of an embodiment of the present application, the present application provides a control circuit, the control circuit is used to perform compensation control on an image of a display panel, the control circuit comprising:

[0007] A compensation module, the compensation module receiving display data for driving the display panel and being activated based on the display data to provide compensation data to the display panel before displaying the picture;

[0008] A repair module, the repair module receiving feedback data of the display panel performing picture display, and starting based on the feedback data to provide repair data to the display panel after the picture is displayed;

[0009] A detection module receives display data of a driving display panel, and determines an abnormal range of an abnormal picture based on the display data, and controls the repair module and / or the compensation module to start according to the abnormal range.

[0010] In one aspect, the control circuit further comprises a system control chip, and the compensation module comprises an image compensation algorithm unit and a first interval controller;

[0011] The image compensation algorithm unit is connected to the system control chip, the image compensation algorithm unit receives the display data provided by the system control chip, and the image compensation algorithm unit generates the compensation data. The first end of the first interval controller is connected to the image compensation algorithm unit, the second end of the first interval controller is connected to the display panel, and the control end of the first interval controller is connected to the detection module;

[0012] The repair module includes a power supply unit, an operational amplifier and a second interval controller;

[0013] The power supply unit is used to provide a DC voltage signal and a power supply voltage, the non-inverting input terminal of the operational amplifier receives the DC voltage signal, the reverse input terminal of the operational amplifier receives feedback data of the display panel, the positive voltage interface of the operational amplifier receives the power supply voltage, and the operational amplifier provides the repair data to the display panel based on the feedback data and the DC voltage signal. The first end of the second interval controller is connected to the power supply unit, the second end of the second interval controller is connected to the positive voltage interface of the operational amplifier, and the control end of the second interval controller is connected to the detection module.

[0014] In one aspect, the first interval controller includes a first response switch, a first end of the first response switch is connected to the image compensation algorithm unit, a second end of the first response switch is connected to the display panel, and a control end of the first response switch is connected to the detection module;

[0015] The second interval controller includes a second response switch and a third response switch, the first end of the second response switch is connected to the power supply unit, the second end of the second response switch is connected to the positive voltage interface of the operational amplifier, the third response switch and the second response switch are connected in parallel, and the control end of the second response switch and the control end of the third response switch are both connected to the detection module.

[0016] In one aspect, the detection module includes a detection unit and a coordinate detection unit;

[0017] The detection unit receives the display data and determines whether the display data is abnormal, and the detection unit is connected to the control end of the first interval controller and the control end of the second interval controller respectively;

[0018] The coordinate detection unit is used to detect the abnormal position of the abnormal screen. One end of the coordinate detection unit is connected to the display panel. The coordinate detection unit is also connected to the control end of the first interval controller and the control end of the second interval controller respectively. The detection unit and the coordinate detection unit jointly control the first interval controller and the second interval controller.

[0019] In one aspect, the first interval controller includes a fourth response switch and a fifth response switch, wherein a first end of the fourth response switch is connected to the image compensation algorithm unit, a second end of the fourth response switch is connected to the display panel, a first end of the fifth response switch is connected to the coordinate detection unit, a second end of the fifth response switch is connected to a control end of the fourth response switch, and the detection unit is connected to the control end of the fifth response switch;

[0020] The second interval controller includes a sixth response switch and a seventh response switch, the first end of the sixth response switch is connected to the power supply unit, the second end of the sixth response switch is connected to the positive voltage interface of the operational amplifier, the first end of the seventh response switch is connected to the image compensation algorithm unit, the second end of the seventh response switch is connected to the second end of the sixth response switch, and the detection unit is connected to the control end of the seventh response switch.

[0021] In one aspect, the first interval controller includes an eighth response switch and a ninth response switch;

[0022] A first end of the eighth response switch is connected to the image compensation algorithm unit, a second end of the eighth response switch is connected to the display panel, a first end of the ninth response switch is connected to the detection unit, a second end of the ninth response switch is connected to the control end of the fourth response switch, and the coordinate detection unit is connected to the control end of the ninth response switch;

[0023] The second interval controller includes a tenth response switch and an eleventh response switch, the first end of the tenth response switch is connected to the power supply unit, the second end of the tenth response switch is connected to the positive voltage interface of the operational amplifier, the first end of the eleventh response switch is connected to the detection unit, the second end of the eleventh response switch is connected to the control end of the tenth response switch, and the coordinate detection unit is connected to the control end of the eleventh response switch.

[0024] In one aspect, the coordinate detection unit includes a first output end and a second output end, the first output end is connected to the compensation module, the second output end is connected to the repair module, the coordinate detection unit provides a control signal to the compensation module based on the first output end, and provides a control signal to the repair module based on the second output end;

[0025] The coordinate detection unit also includes a real-time coordinate interface and a boundary coordinate interface. The real-time coordinate interface receives the real-time coordinates of the abnormal picture, and the boundary coordinate interface receives preset boundary coordinates. The coordinate detection unit compares the real-time coordinates and the boundary coordinates to determine the abnormal range of the abnormal picture.

[0026] In one aspect, the coordinate detection unit includes a first comparator and a second comparator, the real-time coordinates include the first real-time coordinates and the second real-time coordinates, the same-direction input end of the first comparator receives the first real-time coordinates, the reverse input end of the first comparator receives the boundary coordinates, and the output end of the first comparator is the first output end of the coordinate detection unit;

[0027] The same-direction input terminal of the second comparator receives the second real-time coordinate, the reverse input terminal of the second comparator receives the boundary coordinate, and the output terminal of the second comparator is the second output terminal of the coordinate detection unit.

[0028] In one aspect, a display area on the display panel far from the repair module is defined as a first area, a display area close to the repair module is defined as a second area, and the coordinates of a boundary line between the first area and the second area are defined as the boundary coordinates;

[0029] If both the first real-time coordinate and the second real-time coordinate are located in the first area, it is determined that the abnormal range is located in the first area, and the compensation module is started;

[0030] If both the first real-time coordinate and the second real-time coordinate are located in the second area, it is determined that the abnormal range is located in the second area, and the repair module is started;

[0031] If one of the first real-time coordinate and the second real-time coordinate is located in the first area and the other is located in the second area, it is determined that part of the abnormal range is located in the first area and the other part is located in the second area, and the repair module and the compensation module are started at the same time.

[0032] In addition, in order to solve the above problems, the present application also provides a display device, which includes a display panel and a control circuit as described above, the display panel includes a driving chip, and the control circuit is connected to the driving chip of the display panel.

[0033] In the present application, the abnormal range of the abnormal screen is determined by the detection module, and the display position of the abnormal screen can be understood. The abnormal range is used to control the start of one of the compensation module and the repair module, or both are started at the same time. Therefore, the abnormal screen is repaired and compensated according to the abnormal range, and the control compensation is more accurate, which can effectively reduce the situation of excessive repair compensation, reduce resource waste, and reduce power consumption.

[0034] It should be understood that the above general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The drawings herein are incorporated into the specification 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 for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0036] Figure 1 The circuit diagram of an embodiment of the control circuit of the present application is schematically shown.

[0037] Figure 2 The circuit diagram of the compensation module and the repair module in the control circuit of the present application is schematically shown.

[0038] Figure 3 The circuit diagram of the detection unit and the coordinate detection unit in the detection module in the control circuit of the present application is schematically shown.

[0039] Figure 4 The circuit diagram of another embodiment of the detection unit and the coordinate detection unit in the detection module in the control circuit of the present application is schematically shown.

[0040] Figure 5 The schematic diagram shows the structure of the coordinate detection unit in the control circuit of the present application.

[0041] Figure 6 The structure diagram of the first comparator and the second comparator in the coordinate detection unit in the control circuit of the present application is schematically shown.

[0042] Figure 7 The schematic diagram schematically shows that the abnormal range in the control circuit of the present application is located in the first area.

[0043] Figure 8 The schematic diagram schematically shows that the abnormal range in the control circuit of the present application is located in the second area.

[0044] Fig. 9 The schematic diagram schematically shows that the abnormal range in the control circuit of the present application is distributed in both the first area and the second area.

[0045] Fig.10 The schematic diagram schematically shows the left-right distribution of the first area and the second area in the control circuit of the present application.

[0046] Fig.11 A schematic diagram schematically shows the internal and external distribution of the first area and the second area in the control circuit of the present application.

[0047] Fig.12 The structural diagram of the display device of the present application is schematically shown.

[0048] The following are the descriptions of the reference numerals:

[0049] 100, display panel; 200, compensation module; 300, repair module; 400, detection module; 500, system control chip;

[0050] 110, first area; 120, second area; 210, image compensation algorithm unit; 220, first interval controller; 310, power supply unit; 320, operational amplifier; 330, second interval controller; 410, detection unit; 420, coordinate detection unit; T1, first response switch; T2, second response switch; T3, third response switch; T4, fourth response switch; T5, fifth response switch; T6, sixth response switch; T7, seventh response switch; T8, eighth response switch; T9, ninth response switch; T10, tenth response switch; T11, eleventh response switch; A1, first comparator; A2, second comparator; 421, first output terminal; 422, second output terminal; 423, real-time coordinate interface; 424, boundary coordinate interface. DETAILED DESCRIPTION

[0051] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of 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 more comprehensive and complete and fully convey the concept of the example embodiments to those skilled in the art.

[0052] Embodiment 1

[0053] See also Figure 1 As shown, a control circuit is used to perform compensation control on the image of a display panel. The control circuit includes: a compensation module 200, a repair module 300 and a detection module 400.

[0054] The compensation module 200 receives display data of the driving display panel 100, and is started based on the display data to provide compensation data to the display panel 100 before the picture is displayed; the compensation module 200 can compensate before the picture is displayed, and the focus is on prior compensation, and the display picture is compensated by the compensation data to improve the display quality of the display picture. The compensation module 200 can be a software compensation measure.

[0055] The repair module 300 receives feedback data of the display panel 100 for displaying the picture, and is started based on the feedback data to provide the repair data to the display panel 100 after the picture is displayed; the focus of the repair module 300 is post-repair. The picture has been displayed on the display panel 100. Through the feedback data of the display panel 100, the display picture is repaired in a short time to make the display picture normal. The repair module 300 can be a hardware repair measure. Among them, the feedback data can be a common voltage that drives the display panel 100 to display the picture. The common voltage is prone to fluctuations. The repair data can repair the common voltage and reduce the fluctuations of the common voltage.

[0056] The detection module 400 receives the display data of the driving display panel 100, and determines the abnormal range of the abnormal picture based on the display data, and controls the repair module 300 and / or the compensation module 200 to start according to the abnormal range. After determining the abnormal range of the abnormal picture, the repair module 300 can be started, the compensation module 200 can also be started, or the repair module 300 and the compensation module 200 can be started at the same time. Among them, it can be started according to the size of the abnormal range, or it can be started according to the specific position of the abnormal range.

[0057] For example, when the abnormal range is small, the compensation module 200 is started; when the abnormal range is large, the repair module 300 is started; when the abnormal range is very large, the repair module 300 and the compensation module 200 are started at the same time. Of course, when there is no abnormality in the display screen, the repair module 300 and the compensation module 200 can also be turned off at the same time.

[0058] In this embodiment, the abnormal range of the abnormal picture is determined by the detection module 400, so that the display position of the abnormal picture can be known. The abnormal range is used to control the start of one of the compensation module 200 and the repair module 300, or both are started at the same time. Therefore, the abnormal picture is repaired and compensated according to the abnormal range, and the control compensation is more accurate, which can effectively reduce the situation of excessive repair compensation, reduce resource waste, and reduce power consumption.

[0059] In one embodiment of the present application, the control circuit further includes a system control chip 500 (System on Chip), and the compensation module 200 includes an image compensation algorithm unit 210 (Image Compensation Algorithm, ICA) and a first interval controller 220; the first interval controller 220 can be turned on after being subjected to a certain range of voltages.

[0060] The image compensation algorithm unit 210 is connected to the system control chip 500, the image compensation algorithm unit 210 receives the display data provided by the system control chip 500, the image compensation algorithm unit 210 generates compensation data, a first end of the first interval controller 220 is connected to the image compensation algorithm unit 210, a second end of the first interval controller 220 is connected to the display panel 100, and a control end of the first interval controller 220 is connected to the detection module 400; the detection module 400 controls the conduction of the first interval controller 220 by providing a control signal to the first interval controller 220, thereby controlling the image compensation algorithm unit 210 to provide compensation data to the display panel 100.

[0061] The repair module 300 includes a power supply unit 310, an operational amplifier 320 and a second interval controller 330; the power supply unit 310 can be understood as a DC-DC converter, and the second interval controller 330 is also turned on under a certain range of voltage.

[0062] The power supply unit 310 is used to provide a DC voltage signal and a power supply voltage, the non-inverting input terminal of the operational amplifier 320 receives the DC voltage signal, the reverse input terminal of the operational amplifier 320 receives the feedback data of the display panel 100, the positive voltage interface of the operational amplifier 320 receives the power supply voltage, and the operational amplifier 320 provides the repair data to the display panel 100 based on the feedback data and the DC voltage signal, the first terminal of the second interval controller 330 is connected to the power supply unit 310, the second terminal of the second interval controller 330 is connected to the positive voltage interface of the operational amplifier 320, and the control terminal of the second interval controller 330 is connected to the detection module 400. The detection module 400 can also provide a control signal to the second interval controller 330, thereby controlling the conduction of the second interval controller 330, and then controlling the repair module 300 to provide the repair data to the display panel 100.

[0063] The feedback data may be a common voltage. The fluctuation of the common voltage may affect the display screen and easily cause signal crosstalk. The operational amplifier 320 can compensate for the fluctuation of the common voltage and balance the fluctuation of the common voltage. For example, the common voltage is a straight line when output. Due to the fluctuation, the waveform of the common voltage is upward. At this time, the repair data can provide a downward waveform, thereby balancing the upward fluctuation of the common voltage and ensuring that the common voltage is a straight line.

[0064] See also Figure 2As shown, in order to ensure that the repair module 300 and the compensation module 200 can be effectively started, in one embodiment of the present application, the first interval controller 220 includes a first response switch T1, the first end of the first response switch T1 is connected to the image compensation algorithm unit 210, the second end of the first response switch T1 is connected to the display panel 100, and the control end of the first response switch T1 is connected to the detection module 400.

[0065] The second interval controller 330 includes a second response switch T2 and a third response switch T3, the first end of the second response switch T2 is connected to the power supply unit 310, the second end of the second response switch T2 is connected to the positive voltage interface of the operational amplifier 320, the third response switch T3 and the second response switch T2 are connected in parallel, and the control end of the second response switch T2 and the control end of the third response switch T3 are both connected to the detection module 400.

[0066] The conduction conditions of the first response switch T1, the second response switch T2 and the third response switch T3 are all different. Assume that the first response switch T1 is turned on at a first voltage, the second response switch T2 is turned on at a second voltage, and the third response switch T3 is turned on at a third voltage. The first voltage is V1, the second voltage is V2, the third voltage is V3, and the second voltage V2 is less than the first voltage V1 and less than the third voltage V3.

[0067] When the first voltage V1 acts on the control end of the first response switch T1, the first response switch T1 is turned on and the compensation module 200 is started. The second voltage V2 acts on the second response switch T2, and the second response switch T2 is turned on. It can be understood that the second voltage V2 is at a low level and the first voltage V1 is at a high level. The third voltage V3 is also at a high level, and the turn-on requirement of the third response switch T3 is higher than that of the first response switch T1. After the third voltage V3 is output, the first response switch T1 is turned on, the third response switch T3 is also turned on, and the second response switch T2 is turned off. That is to say, under the action of the first voltage and the third voltage, the second interval controller 330 can be turned on, so that the repair module 300 can provide repair data in both cases.

[0068] When the display screen is normal and the provided voltage level is less than the second voltage, the first response switch T1 , the second response switch T2 and the third response switch T3 are all disconnected, and the repair module 300 and the compensation module 200 are both turned off.

[0069] In one embodiment of the present application, the detection module 400 includes a detection unit 410 and a coordinate detection unit 420; the detection unit 410 receives display data and determines whether the display data is abnormal, and the detection unit 410 is respectively connected to the control end of the first interval controller 220 and the control end of the second interval controller 330; the detection unit 410 provides control signals to the first interval controller 220 and the second interval controller 330 respectively, thereby completing the conduction control of the first interval controller 220 and the second interval controller 330.

[0070] The coordinate detection unit 420 is used to detect the abnormal position of the abnormal screen. One end of the coordinate detection unit 420 is connected to the display panel 100. The coordinate detection unit 420 is also connected to the control end of the first interval controller 220 and the control end of the second interval controller 330 respectively. The detection unit 410 and the coordinate detection unit 420 jointly control the first interval controller 220 and the second interval controller 330. In other words, the on and off of the first interval controller 220 and the second interval controller 330 are controlled by the detection unit 410 and the coordinate detection unit 420 in cooperation with each other. It can also be understood that whether to start the repair module 300 and the compensation module 200 is jointly determined by two factors: whether the screen is abnormal and the abnormal range.

[0071] See also Figure 3 As shown, in order to ensure the joint control of the compensation module 200 by the coordinate detection unit 420 and the detection unit 410, in one embodiment of the present application, the first interval controller 220 includes a fourth response switch T4 and a fifth response switch T5, a first end of the fourth response switch T4 is connected to the image compensation algorithm unit 210, a second end of the fourth response switch T4 is connected to the display panel 100, a first end of the fifth response switch T5 is connected to the coordinate detection unit 420, a second end of the fifth response switch T5 is connected to the control end of the fourth response switch T4, and the detection unit 410 is connected to the control end of the fifth response switch T5.

[0072] When controlling the first interval controller 220, the detection unit 410 first detects whether the display screen is abnormal. If the display screen is detected to be abnormal, the detection unit 410 provides a control signal to the control end of the fifth response switch T5. At this time, the coordinate detection unit 420 detects the abnormal range of the abnormal screen. When the abnormal range is serious, a signal is provided to the first end of the fifth response switch T5, and through the fifth response switch T5, it acts on the control end of the fourth response switch T4, and the fourth response switch T4 is turned on, so that the image compensation algorithm unit 210 provides compensation data.

[0073] In order to ensure the joint control of the coordinate detection unit 420 and the detection unit 410 over the repair module 300, the second interval controller 330 includes a sixth response switch T6 and a seventh response switch T7, the first end of the sixth response switch T6 is connected to the power supply unit 310, the second end of the sixth response switch T6 is connected to the positive voltage interface of the operational amplifier 320, the first end of the seventh response switch T7 is connected to the image compensation algorithm unit 210, the second end of the seventh response switch T7 is connected to the second end of the sixth response switch T6, and the detection unit 410 is connected to the control end of the seventh response switch T7.

[0074] When controlling the second interval controller 330, the detection unit 410 first detects whether the display screen is abnormal. If the display screen is detected to be abnormal, the detection unit 410 provides a control signal to the control end of the seventh response switch T7. At this time, the coordinate detection unit 420 detects the abnormal range of the abnormal screen. When the abnormal range is slight, a control signal is provided to the first end of the sixth response switch T6. Through the sixth response switch T6, the control signal acts on the control end of the sixth response switch T6, and the sixth response switch T6 is turned on, so that the operational amplifier 320 provides repair data.

[0075] Generally, the control signal of the detection unit 410 to control the fifth response switch T5 and the seventh response switch T7 to be turned on is high level. After the fifth response switch T5 or the seventh response switch T7 is turned on, the coordinate detection unit 420 can also output a high level to control the fourth response switch T4 and the sixth response switch T6 to be turned on.

[0076] See also Figure 4 As shown, in one embodiment of the present application, the first interval controller 220 includes an eighth response switch T8 and a ninth response switch T9, a first end of the eighth response switch T8 is connected to the image compensation algorithm unit 210, a second end of the eighth response switch T8 is connected to the display panel 100, a first end of the ninth response switch T9 is connected to the detection unit 410, a second end of the ninth response switch T9 is connected to the control end of the fourth response switch T4, and the coordinate detection unit 420 is connected to the control end of the ninth response switch T9.

[0077] The second interval controller 330 includes a tenth response switch T10 and an eleventh response switch T11, wherein a first end of the tenth response switch T10 is connected to the power supply unit 310, a second end of the tenth response switch T10 is connected to the positive voltage interface of the operational amplifier 320, a first end of the eleventh response switch T11 is connected to the detection unit 410, a second end of the eleventh response switch T11 is connected to the control end of the tenth response switch T10, and the coordinate detection unit 420 is connected to the control end of the eleventh response switch T11.

[0078] First, the image is detected by the detection unit 410 to determine whether the displayed image is an abnormal image and whether compensation and repair are required. Then, the position of the abnormal image is determined by the coordinate detection unit 420.

[0079] For example, when the coordinate detection unit 420 detects an abnormal image and the compensation module 200 needs to be activated, the coordinate detection unit 420 outputs a control signal to the control end of the ninth response switch T9, and the first end and the second end of the ninth response switch T9 are turned on. The detection unit 410 provides a control signal to the control end of the eighth response switch T8 through the ninth response switch T9, so that the first end and the second end of the eighth response switch T8 are turned on, and the compensation data provided by the image compensation algorithm unit 210 is loaded onto the display panel 100.

[0080] When the repair module 300 needs to be activated, the coordinate detection unit 420 provides a control signal to the control end of the eleventh response switch T11, so that the first end and the second end of the eleventh response switch T11 are turned on. The detection unit 410 provides a control signal to the control end of the tenth response switch T10 through the eleventh response switch T11, and the first end and the second end of the tenth response switch T10 are turned on, and the repair data provided by the operational amplifier 320 is loaded onto the display panel 100.

[0081] Generally, the eighth response switch T8 and the tenth response switch T10 are turned on under the action of a high level. After the detection unit 410 detects an abnormal screen, a high level is provided to the eighth response switch T8 and the tenth response switch T10 respectively. The coordinate detection unit 420 controls the on-off of the ninth response switch T9 and the eleventh response switch T11 to control the control signal output of the detection unit 410. The coordinate detection unit 420 controls the ninth response switch T9 and the eleventh response switch T11 by outputting a high level or a low level.

[0082] See also Figure 5 As shown, in one embodiment of the present application, the coordinate detection unit 420 includes a first output terminal 421 and a second output terminal 422, the first output terminal 421 is connected to the compensation module 200, and the second output terminal 422 is connected to the repair module 300, the coordinate detection unit 420 provides a control signal to the compensation module 200 based on the first output terminal 421, and provides a control signal to the repair module 300 based on the second output terminal 422; through the two output terminals, the coordinate detection unit 420 can provide two different signals to realize the control of the compensation module 200 and the repair module 300.

[0083] The coordinate detection unit 420 also includes a real-time coordinate interface 423 and a boundary coordinate interface 424. The real-time coordinate interface 423 receives the real-time coordinates of the abnormal screen, and the boundary coordinate interface 424 receives the preset boundary coordinates. The coordinate detection unit 420 compares the real-time coordinates and the boundary coordinates, and can analyze the position of the abnormal screen and determine the abnormal range of the abnormal screen. The boundary coordinates can be used as a basis for dividing the abnormal range.

[0084] See also Figure 6 As shown, in one embodiment of the present application, the coordinate detection unit 420 includes a first comparator A1 and a second comparator A2, the real-time coordinates include the first real-time coordinates and the second real-time coordinates, the same-direction input end of the first comparator A1 receives the first real-time coordinates, the reverse input end of the first comparator A1 receives the boundary coordinates, and the output end of the first comparator A1 is the first output end 421 of the coordinate detection unit 420. The first real-time coordinates and the boundary coordinates are compared by the first comparator A1 to determine the positional relationship between the first real-time coordinates and the boundary coordinates.

[0085] The same direction input terminal of the second comparator A2 receives the second real-time coordinates, the reverse direction input terminal of the second comparator A2 receives the boundary coordinates, and the output terminal of the second comparator A2 is the second output terminal 422 of the coordinate detection unit 420. The second real-time coordinates and the boundary coordinates are compared by the second comparator A2 to determine the positional relationship between the second real-time coordinates and the boundary coordinates.

[0086] The first real-time coordinate and the second real-time coordinate may be the relative coordinates of two points of the outer expansion line of the abnormal image. By analyzing and judging the first real-time coordinate and the second real-time coordinate with the boundary coordinate, the positional relationship between the two real-time coordinates and the boundary coordinate can be understood, and the distance between the two real-time coordinates and the boundary coordinate can also be understood, so as to judge the position of the abnormal image on the display panel 100. This is convenient for repairing and compensating the abnormal image in the future.

[0087] In one embodiment of the present application, a display area on the display panel 100 away from the repair module 300 is defined as a first area 110, a display area close to the repair module 300 is defined as a second area 120, and the coordinates of a dividing line between the first area 110 and the second area 120 are boundary coordinates; a dividing line can be drawn on the display area, the dividing line crosses the display area of ​​the display panel 100, and the boundary coordinates can be the coordinate points on the dividing line.

[0088] If the first real-time coordinate and the second real-time coordinate are both located in the first area 110, it is determined that the abnormal range is located in the first area 110, and the compensation module 200 is started; it can be understood that the first area 110 is an area that has a greater impact on the user's observation. For example, the position close to the middle of the display panel 100. At this time, the compensation module 200 can be started to repair and compensate the display screen.

[0089] If both the first real-time coordinate and the second real-time coordinate are located in the second area 120, it is determined that the abnormal range is located in the second area 120, and the repair module 300 is started; it can be understood that the second area 120 is an area with less impact on user observation, such as the edge area of ​​the display panel 100. At this time, the repair module 300 with a certain effect of repairing and compensating the display screen can be started. Although the compensation effect of the compensation module 200 is obvious, the power consumption is large; although the repair effect of the repair module 300 is not as good as that of the compensation module 200, the power consumption is low. In this way, according to the different abnormal ranges of the display screen, different repair and compensation measures are provided in a targeted manner to reduce transition repair and reduce power consumption.

[0090] If one of the first real-time coordinate and the second real-time coordinate is located in the first area 110 and the other is located in the second area 120, it is determined that part of the abnormal range is located in the first area 110 and the other part is located in the second area 120, and the repair module 300 and the compensation module 200 are started at the same time. In this case, the distribution of the abnormal range is relatively special, and the display screen can be better repaired and compensated by starting the repair module 300 and the compensation module 200 at the same time.

[0091] The coordinates can be abscissas or ordinates, that is, x representing the abscissa or y representing the ordinate. For example, the resolution of the display panel 100 is 1920*1080, the repair module 300 is arranged below the display panel 100, and a coordinate system is established in the display area of ​​the display panel 100, with the lower left being the origin of the coordinate system, i.e. (0, 0). The coordinates of the four corner positions of the display area of ​​the display panel 100 are (0, 0), (0, 1080), (1920, 1080), (1920, 0). The coordinates of the four corner points of the abnormal range are (x1, y1), (x1, y2), (x2, y1), (x2, y2). The first area 110 is above and the second area 120 is below. The first real-time coordinate is defined as y1, the second real-time coordinate is defined as y2, the boundary coordinate is defined as y0, and the abnormal range is determined by the ordinate.

[0092] See also Figure 7 As shown, if y2>y0 and y1>y0, it means that the abnormal image is located in the first area 110, the first output terminal 421 outputs a high level, and the compensation module 200 is controlled to start compensation.

[0093] See also Figure 8 As shown, if y0>y1 and y0>y2, it means that the abnormal image is located in the second area 120, the second output terminal 422 outputs a high level, and the control repair module 300 is turned on for repair.

[0094] See also Fig. 9As shown, if y1>y0 but y0>y2, it means that part of the abnormal picture is located in the first area 110, and part is located in the second area 120. At this time, the first output terminal 421 and the second output terminal 422 simultaneously output high level, and the compensation module 200 and the repair module 300 compensate simultaneously. The dividing line can be a boundary in the middle of the display panel 100.

[0095] The repair module 300 is mainly completed by inverting the common voltage. The repair data that is inverted with the common voltage is easy to decay in the extension direction of the line. The second area 120 is closer to the repair module 300. When the repair module 300 is started when the abnormal screen is in the second area 120, the attenuation of the repair data can be reduced, so that the repair module 300 can effectively play a repair role.

[0096] As can be seen from the above, by comparing y1 and y2 with y0 respectively, the position of the abnormal picture is determined. The abnormal range is determined by two points. In addition, the abnormal range can also be determined by x1 and x2, or by four points together.

[0097] In the above example, the abnormal range is a rectangular window and the image is regular. If it is an irregular image, the number of ordinates is greater, such as the ordinates are set with four different coordinates, then two more operational amplifiers 320 are needed for calculation.

[0098] In addition, see Fig.10 As shown, the division method of the first area 110 and the second area 120 can also be distinguished in the vertical direction, the coordinates of the dividing line are (x0, 1080) and (x0, 0), the first area 110 is on the left, and the second area 120 is on the right.

[0099] See also Fig.11 As shown, the dividing line is a rectangle, dividing the display area of ​​the display panel 100 into a central area and an edge area, the first area 110 is the central area, and the second area 120 is the edge area.

[0100] In the above embodiments, the control terminal of the general response switch is the gate, the first terminal is the source, and the second terminal is the drain. Alternatively, the first terminal is the drain and the second terminal is the source.

[0101] Embodiment 2

[0102] See also Fig.12 As shown, the present application also provides a display device, the display device includes a display panel 100 and a control circuit as described above, the display panel 100 includes a driver chip, and the control circuit is connected to the driver chip of the display panel 100. For example, the compensation module 200 of the control circuit is connected to the driver chip, and the repair module 300 of the control circuit is directly connected to the common voltage line in the display panel 100.

[0103] For other specific implementations and beneficial effects of the display device, please refer to the above-mentioned control circuit solution, which will not be described in detail here.

[0104] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the invention disclosed herein. The present application is intended to cover any modification, use or adaptation of the present application, which follows the general principles of the present application and includes common knowledge or customary technical means in the art that are not disclosed in the present application.

[0105] It should be understood that the present application is not limited to the precise structures that have been 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 control circuit, characterized in that: The control circuit is used to perform compensation control on the image of the display panel, and the control circuit includes: A compensation module, the compensation module receiving display data for driving the display panel and being activated based on the display data to provide compensation data to the display panel before displaying the picture; A repair module, the repair module receiving feedback data of the display panel performing picture display, and starting based on the feedback data to provide repair data to the display panel after the picture is displayed; A detection module receives display data of a driving display panel, and determines an abnormal range of an abnormal picture based on the display data, and controls the repair module and / or the compensation module to start according to the abnormal range.

2. The control circuit according to claim 1, characterized in that: The control circuit further includes a system control chip, and the compensation module includes an image compensation algorithm unit and a first interval controller; The image compensation algorithm unit is connected to the system control chip, the image compensation algorithm unit receives the display data provided by the system control chip, and the image compensation algorithm unit generates the compensation data. The first end of the first interval controller is connected to the image compensation algorithm unit, the second end of the first interval controller is connected to the display panel, and the control end of the first interval controller is connected to the detection module; The repair module includes a power supply unit, an operational amplifier and a second interval controller; The power supply unit is used to provide a DC voltage signal and a power supply voltage, the non-inverting input terminal of the operational amplifier receives the DC voltage signal, the reverse input terminal of the operational amplifier receives feedback data of the display panel, the positive voltage interface of the operational amplifier receives the power supply voltage, and the operational amplifier provides the repair data to the display panel based on the feedback data and the DC voltage signal. The first end of the second interval controller is connected to the power supply unit, the second end of the second interval controller is connected to the positive voltage interface of the operational amplifier, and the control end of the second interval controller is connected to the detection module.

3. The control circuit according to claim 2, characterized in that: The first interval controller includes a first response switch, a first end of the first response switch is connected to the image compensation algorithm unit, a second end of the first response switch is connected to the display panel, and a control end of the first response switch is connected to the detection module; The second interval controller includes a second response switch and a third response switch, the first end of the second response switch is connected to the power supply unit, the second end of the second response switch is connected to the positive voltage interface of the operational amplifier, the third response switch and the second response switch are connected in parallel, and the control end of the second response switch and the control end of the third response switch are both connected to the detection module.

4. The control circuit according to claim 1, characterized in that: The detection module includes a detection unit and a coordinate detection unit; The detection unit receives the display data and determines whether the display data is abnormal, and the detection unit is connected to the control end of the first interval controller and the control end of the second interval controller respectively; The coordinate detection unit is used to detect the abnormal position of the abnormal screen. One end of the coordinate detection unit is connected to the display panel. The coordinate detection unit is also connected to the control end of the first interval controller and the control end of the second interval controller respectively. The detection unit and the coordinate detection unit jointly control the first interval controller and the second interval controller.

5. The control circuit according to claim 4, characterized in that: The first interval controller includes a fourth response switch and a fifth response switch, wherein a first end of the fourth response switch is connected to the image compensation algorithm unit, a second end of the fourth response switch is connected to the display panel, a first end of the fifth response switch is connected to the coordinate detection unit, a second end of the fifth response switch is connected to the control end of the fourth response switch, and the detection unit is connected to the control end of the fifth response switch; The second interval controller includes a sixth response switch and a seventh response switch, the first end of the sixth response switch is connected to the power supply unit, the second end of the sixth response switch is connected to the positive voltage interface of the operational amplifier, the first end of the seventh response switch is connected to the image compensation algorithm unit, the second end of the seventh response switch is connected to the second end of the sixth response switch, and the detection unit is connected to the control end of the seventh response switch.

6. The control circuit according to claim 4, characterized in that: The first interval controller includes an eighth response switch and a ninth response switch; A first end of the eighth response switch is connected to the image compensation algorithm unit, a second end of the eighth response switch is connected to the display panel, a first end of the ninth response switch is connected to the detection unit, a second end of the ninth response switch is connected to the control end of the fourth response switch, and the coordinate detection unit is connected to the control end of the ninth response switch; The second interval controller includes a tenth response switch and an eleventh response switch, the first end of the tenth response switch is connected to the power supply unit, the second end of the tenth response switch is connected to the positive voltage interface of the operational amplifier, the first end of the eleventh response switch is connected to the detection unit, the second end of the eleventh response switch is connected to the control end of the tenth response switch, and the coordinate detection unit is connected to the control end of the eleventh response switch.

7. The control circuit according to claim 4, characterized in that: The coordinate detection unit includes a first output end and a second output end, the first output end is connected to the compensation module, the second output end is connected to the repair module, the coordinate detection unit provides a control signal to the compensation module based on the first output end, and provides a control signal to the repair module based on the second output end; The coordinate detection unit also includes a real-time coordinate interface and a boundary coordinate interface. The real-time coordinate interface receives the real-time coordinates of the abnormal picture, and the boundary coordinate interface receives preset boundary coordinates. The coordinate detection unit compares the real-time coordinates and the boundary coordinates to determine the abnormal range of the abnormal picture.

8. The control circuit according to claim 7, characterized in that: The coordinate detection unit includes a first comparator and a second comparator, the real-time coordinates include the first real-time coordinates and the second real-time coordinates, the same-direction input end of the first comparator receives the first real-time coordinates, the reverse input end of the first comparator receives the boundary coordinates, and the output end of the first comparator is the first output end of the coordinate detection unit; The same-direction input terminal of the second comparator receives the second real-time coordinate, the reverse input terminal of the second comparator receives the boundary coordinate, and the output terminal of the second comparator is the second output terminal of the coordinate detection unit.

9. The control circuit according to claim 8, characterized in that: Define a display area on the display panel far from the repair module as a first area, a display area close to the repair module as a second area, and the coordinates of a boundary line between the first area and the second area as the boundary coordinates; If both the first real-time coordinate and the second real-time coordinate are located in the first area, it is determined that the abnormal range is located in the first area, and the compensation module is started; If both the first real-time coordinate and the second real-time coordinate are located in the second area, it is determined that the abnormal range is located in the second area, and the repair module is started; If one of the first real-time coordinate and the second real-time coordinate is located in the first area and the other is located in the second area, it is determined that part of the abnormal range is located in the first area and the other part is located in the second area, and the repair module and the compensation module are started at the same time.

10. A display device, characterized in that: The display device comprises a display panel and a control circuit as claimed in any one of claims 1 to 9, the display panel comprises a driving chip, and the control circuit is connected to the driving chip of the display panel.

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