Control circuit and display device

Abstract

The application discloses a control circuit and a display device. The control circuit is used for compensation control of a picture of a display panel, and comprises a compensation module, a repair module and a detection module. The compensation module receives display data for driving the display panel, and is started based on the display data to provide compensation data to the display panel before picture display. The repair module receives feedback data of picture display of the display panel, and is started based on the feedback data to provide repair data to the display panel after picture display. The detection module receives the display data for driving the display panel, and determines an abnormal range of an abnormal picture based on the display data. According to the abnormal range, the repair module and / or the compensation module is controlled to start. The technical scheme of the application can reduce over-repair compensation, reduce resource waste and reduce power consumption.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of display, and particularly relates to a control circuit and a display device. BACKGROUND

[0002] In the existing display products, with the continuous improvement of product refresh rate, the in-plane crosstalk of the display panel is more and more serious. Therefore, software measures and hardware measures are usually adopted to repair and compensate the display picture.

[0003] However, in the execution process of the software measures and the hardware measures, it is difficult to repair and compensate the picture abnormity in a targeted manner, and over-repair and compensation often occurs, which causes serious waste of resources and increases power consumption. SUMMARY

[0004] The present application aims to provide a control circuit which can effectively reduce over-repair and compensation, reduce resource waste and reduce power consumption.

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

[0006] According to one aspect of the embodiments of the present application, the present application provides a control circuit for compensation control of a picture of a display panel, the control circuit comprising:

[0007] a compensation module, which receives display data for driving the display panel, and is activated based on the display data to provide compensation data to the display panel before picture display;

[0008] a repair module, which receives feedback data of picture display of the display panel, and is activated based on the feedback data to provide repair data to the display panel after picture display;

[0009] a detection module, which receives display data for driving the 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 be activated 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 with the system control chip, the image compensation algorithm unit receives the display data provided by the system control chip, the image compensation algorithm unit generates the compensation data, a first end of the first interval controller is connected with the image compensation algorithm unit, a second end of the first interval controller is connected with the display panel, and a control end of the first interval controller is connected with the detection module.

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

[0013] The power supply unit is configured to provide a direct current voltage signal and a power voltage, a same direction input end of the operational amplifier receives the direct current voltage signal, an opposite direction input end of the operational amplifier receives feedback data of the display panel, a positive voltage interface of the operational amplifier receives the power voltage, and the operational amplifier provides the repair data to the display panel based on the feedback data and the direct current voltage signal.

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

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

[0016] In one aspect, the detection module comprises a detection unit and a coordinate detection unit.

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

[0018] The coordinate detection unit is configured to detect an abnormal position of the abnormal picture, one end of the coordinate detection unit is connected with the display panel, and the coordinate detection unit is also connected with the control end of the first interval controller and the control end of the second interval controller respectively.

[0019] In one aspect, the first interval controller includes a fourth response switch and a fifth response switch, 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 a control end of the fifth response switch.

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

[0023] The second interval controller includes a tenth response switch and an eleventh response switch, a first end of the tenth response switch is connected to the power supply unit, a second end of the tenth response switch is connected to a positive voltage interface of the operational amplifier, a first end of the eleventh response switch is connected to the detection unit, a second end of the eleventh response switch is connected to a control end of the tenth response switch, and the coordinate detection unit is connected to a 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 further includes a real-time coordinate interface and a demarcation coordinate interface, the real-time coordinate interface receives a real-time coordinate of the abnormal picture, the demarcation coordinate interface receives a preset demarcation coordinate, and the coordinate detection unit compares the real-time coordinate and the demarcation coordinate to determine an abnormal range of the abnormal picture.

[0026] In one aspect, the coordinate detection unit comprises a first comparator and a second comparator, the real-time coordinates comprise first real-time coordinates and second real-time coordinates, the same input end of the first comparator receives the first real-time coordinates, the opposite input end of the first comparator receives the demarcation coordinates, and the output end of the first comparator is the first output end of the coordinate detection unit;

[0027] The same input end of the second comparator receives the second real-time coordinates, the opposite input end of the second comparator receives the demarcation coordinates, and the output end of the second comparator is the second output end of the coordinate detection unit.

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

[0029] If the first real-time coordinates and the second real-time coordinates are both 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 the first real-time coordinates and the second real-time coordinates are both 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 coordinates and the second real-time coordinates is located in the first area, and the other is located in the second area, it is determined that the abnormal range is partially located in the first area and partially located in the second area, and the repair module and the compensation module are started simultaneously.

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

[0033] In the application, the abnormal range of the abnormal picture is determined by the detection module, and the display position of the abnormal picture can be understood. One of the compensation module and the repair module is controlled to start or both are started simultaneously by the abnormal range. Thus, the abnormal picture is repaired and compensated according to the abnormal range, the control of compensation is more accurate, the situation of excessive repair and compensation can be effectively reduced, resource waste is reduced, and power consumption is reduced.

[0034] It should be understood that the foregoing general description and the following detailed description are only exemplary and explanatory, and cannot limit the application. BRIEF DESCRIPTION OF DRAWINGS

[0035] The accompanying drawings, which are incorporated herein and constitute part of this specification, illustrate embodiments consistent with the application and, together with the description, further serve to explain the principles of the application. It is apparent that the drawing in the following description is only some embodiments of the present application, and other drawings can be obtained by those of ordinary skill in the art without creative labor on the basis of these drawings.

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

[0037] Figure 2 The circuit schematic 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 schematic 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 schematic 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 structural schematic diagram of the coordinate detection unit in the control circuit of the present application is schematically shown.

[0041] Figure 6 The structural schematic 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 of the abnormal range located in the first area in the control circuit of the present application is schematically shown.

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

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

[0045] Figure 10 The schematic diagram of the first area and the second area distributed left and right in the control circuit of the present application is schematically shown.

[0046] Figure 11 The schematic diagram of the first area and the second area distributed inside and outside in the control circuit of the present application is schematically shown.

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

[0048] Reference signs are explained as follows:

[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 end; 422, second output end; 423, real-time coordinate interface; 424, demarcation coordinate interface. DETAILED DESCRIPTION

[0051] Example implementations will now be described more fully with reference to the accompanying drawings. Example implementations may, however, be implemented in many different forms and should not be construed as limited to the examples set forth herein; rather, these implementations are provided so that this disclosure will be thorough and complete, and will fully convey the scope of example implementations to those skilled in the art.

[0052] Embodiment one

[0053] Reference Figure 1 As shown in the figure, a control circuit for compensating control of a display panel, the control circuit comprising: a compensation module 200, a repair module 300 and a detection module 400.

[0054] The compensation module 200 receives display data for driving the display panel 100, and is started based on the display data to provide compensation data to the display panel 100 before the display of the picture; the compensation module 200 can compensate when the picture has not been displayed, and the focus is on prior compensation, the display quality of the display picture is improved by compensating the display picture with compensation data, and the compensation module 200 can be a software compensation measure.

[0055] The repair module 300 receives feedback data of the display panel 100 displaying a picture, and is started based on the feedback data to provide repair data to the display panel 100 after the picture is displayed; the repair module 300 focuses on after-repair, and the picture has been displayed on the display panel 100, the display panel 100 provides feedback data, the display picture is repaired in a short time, the display picture is normal, and the repair module 300 can be a hardware repair measure. The feedback data can be a common voltage for driving the display panel 100 to display a picture, the common voltage is prone to fluctuation, and the repair data can repair the common voltage and reduce the fluctuation of the common voltage.

[0056] The detection module 400 receives display data for driving the display panel 100, and determines an abnormal range of an 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 the abnormal range of the abnormal picture is determined, the repair module 300 can be started, the compensation module 200 can 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; and 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 the display picture is normal, the repair module 300 and the compensation module 200 can be turned off at the same time.

[0058] In the embodiment, the detection module 400 determines the abnormal range of the abnormal picture, and can understand the display position of the abnormal picture. One of the compensation module 200 and the repair module 300 is started, or both are started at the same time. Thus, the abnormal picture is repaired and compensated according to the abnormal range, the compensation is more accurate, the situation of excessive repair and compensation is effectively reduced, the resource waste is reduced, and the power consumption is reduced.

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

[0060] The image compensation algorithm unit 210 is connected with the system control chip 500, and the image compensation algorithm unit 210 receives display data provided by the system control chip 500. The image compensation algorithm unit 210 generates compensation data. The first end of the first interval controller 220 is connected with the image compensation algorithm unit 210, the second end of the first interval controller 220 is connected with the display panel 100, and the control end of the first interval controller 220 is connected with 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, so as to control 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. The second interval controller 330 is also turned on under the action of a certain range of voltage.

[0062] The power supply unit 310 is used to provide a direct current voltage signal and a power supply voltage. The same direction input end of the operational amplifier 320 receives the direct current voltage signal. The reverse input end of the operational amplifier 320 receives feedback data of the display panel 100. The positive voltage interface of the operational amplifier 320 receives the power supply voltage. The operational amplifier 320 provides repair data to the display panel 100 based on the feedback data and the direct current voltage signal. The first end of the second interval controller 330 is connected with the power supply unit 310. The second end of the second interval controller 330 is connected with the positive voltage interface of the operational amplifier 320. The control end of the second interval controller 330 is connected with the detection module 400. The detection module 400 can also provide a control signal to the second interval controller 330, so as to control the conduction of the second interval controller 330, and further control the repair module 300 to provide repair data to the display panel 100.

[0063] The feedback data can be a common voltage. Fluctuation of the common voltage can affect the display picture 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 fluctuation, the waveform of the common voltage goes up. At this time, the repair data can provide a downward waveform, so as to balance the upward fluctuation of the common voltage and ensure that the common voltage is a straight line.

[0064] Referring to Figure 2As shown, in order to ensure that the repair module 300 and the compensation module 200 can be effectively started, in an embodiment of the present application, the first interval controller 220 includes a first response switch T1, a first end of the first response switch T1 is connected to the image compensation algorithm unit 210, a second end of the first response switch T1 is connected to the display panel 100, and a 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, a first end of the second response switch T2 is connected to the power supply unit 310, a second end of the second response switch T2 is connected to a positive voltage interface of the operational amplifier 320, the third response switch T3 is connected in parallel with the second response switch T2, and a control end of the second response switch T2 and a 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. It is assumed 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, and the third voltage is V3, and V2 < V1 < 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 a low level, and the first voltage V1 is a high level. The third voltage V3 is also a high level, and the conduction 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, 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 two cases.

[0068] When there is no abnormality in the display picture, and the provided 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 turned off, 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. The detection unit 410 is 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 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 location of the abnormal image. 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. The detection unit 410 and the coordinate detection unit 420 jointly control the first and second interval controllers 220 and 330. In other words, the first and second interval controllers 220 and 330 are turned on and off by the detection unit 410 and the coordinate detection unit 420 working together to achieve joint control. It can also be understood that whether to activate the repair module 300 and the compensation module 200 is determined by the presence of an abnormal image and the scope of the abnormality.

[0071] See 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 checks whether the displayed image is abnormal. If so, the detection unit 410 provides a control signal to the control terminal of the fifth response switch T5. At this point, the coordinate detection unit 420 detects the abnormal range of the abnormal image. If the abnormal range is severe, a signal is provided to the first terminal of the fifth response switch T5. This signal, acting through the fifth response switch T5, acts on the control terminal of the fourth response switch T4, turning on the fourth response switch T4 and causing the image compensation algorithm unit 210 to provide compensation data.

[0073] In order to ensure the joint control of the coordinate detection unit 420 and the detection unit 410 to the repair module 300, the second interval controller 330 comprises 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 the second interval controller 330 is controlled, the detection unit 410 first detects whether the display picture is abnormal, and if it is detected that the display picture is abnormal, the detection unit 410 provides a control signal for turning on 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 picture. When the abnormal range is slight, a control signal is provided to the first end of the sixth response switch T6, and 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 for turning on the fifth response switch T5 and the seventh response switch T7 by the detection unit 410 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 high level to control the fourth response switch T4 and the sixth response switch T6 to be turned on.

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

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

[0078] First, the display picture is detected by the detecting unit 410 to determine whether the display picture is an abnormal picture and whether compensation repair is needed. Then, the position of the abnormal picture is determined by the coordinate detecting unit 420.

[0079] For example, the coordinate detecting unit 420 detects an abnormal picture and the compensation module 200 needs to be started. The coordinate detecting 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 detecting 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 started, the coordinate detecting 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 detecting unit 410 provides a control signal to the control end of the tenth response switch T10 through the eleventh response switch T11, so that 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 detecting unit 410 detects an abnormal picture, a high level is provided to the eighth response switch T8 and the tenth response switch T10, respectively. The on-off control of the ninth response switch T9 and the eleventh response switch T11 is controlled by the coordinate detecting unit 420 to output the control signal of the detecting unit 410. The way in which the coordinate detecting unit 420 controls the ninth response switch T9 and the eleventh response switch T11 can also be by outputting a high level or by outputting a low level.

[0082] Referring to Figure 5 In an embodiment of the present application, the coordinate detecting unit 420 includes a first output end 421 and a second output end 422. The first output end 421 is connected to the compensation module 200, and the second output end 422 is connected to the repair module 300. The coordinate detecting unit 420 provides a control signal to the compensation module 200 based on the first output end 421 and provides a control signal to the repair module 300 based on the second output end 422. Through the two output ends, the coordinate detecting unit 420 can provide two different signals to control the compensation module 200 and the repair module 300.

[0083] The coordinate detection unit 420 further comprises 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 image, and the boundary coordinate interface 424 receives the preset boundary coordinates. The coordinate detection unit 420 compares the real-time coordinates with the boundary coordinates, analyzes the position of the abnormal image, and determines the abnormal range of the abnormal image. The boundary coordinates can be used as a basis for dividing the abnormal range.

[0084] Referring to Figure 6 In an embodiment of the present application, the coordinate detection unit 420 comprises a first comparator A1 and a second comparator A2. The real-time coordinates comprise first real-time coordinates and second real-time coordinates. The same input end of the first comparator A1 receives the first real-time coordinates, and the opposite input end of the first comparator A1 receives the boundary coordinates. 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 input end of the second comparator A2 receives the second real-time coordinates, and the opposite input end of the second comparator A2 receives the boundary coordinates. The output end of the second comparator A2 is the second output end 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 coordinates and the second real-time coordinates can be the coordinates of the two points of the outward extension line of the abnormal image. Through the analysis and judgment of the first real-time coordinates and the second real-time coordinates and the boundary coordinates, the positional relationship between the two real-time coordinates and the boundary coordinates can be understood, and the distance between the two real-time coordinates and the boundary coordinates can also be understood, so as to determine the position of the abnormal image on the display panel 100. This can be used as a basis for subsequent repair and compensation of the abnormal image.

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

[0088] If the first real-time coordinates and the second real-time coordinates 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 user observation. For example, the position close to the middle of the display panel 100. At this time, the compensation module 200 for repairing and compensating the display image can be started.

[0089] If the first real-time coordinate and the second real-time coordinate are both located in the second area 120, it is determined that the abnormal range is located in the second area 120, and the repairing module 300 is started. It can be understood that the second area 120 is an area with less influence on user observation, such as an edge area of the display panel 100. At this time, the repairing module 300 with certain efficacy for repairing and compensating the display picture can be started. The compensating module 200 has obvious compensation effect, but has large power consumption; the repairing module 300 has lower power consumption than the compensating module 200, but has lower repairing effect. Thus, different repairing and compensating measures are provided according to different abnormal ranges of the display picture, excessive repairing is reduced, and power consumption is reduced.

[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 the abnormal range is partially located in the first area 110 and partially located in the second area 120, and the repairing module 300 and the compensating module 200 are started at the same time. In this case, the abnormal range is distributed in a special way, and the display picture can be better repaired and compensated by starting the repairing module 300 and the compensating module 200 at the same time.

[0091] The coordinates can be horizontal coordinates or vertical coordinates, that is, x representing the horizontal coordinate or y representing the vertical coordinate. For example, the resolution of the display panel 100 is 1920*1080, the repairing 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 as the origin of the coordinate system, that is, (0, 0). The coordinates of the four corners of the display area of the display panel 100 are (0, 0), (0, 1080), (1920, 1080), and (1920, 0). The coordinates of the four corner points of the abnormal range are (x1, y1), (x1, y2), (x2, y1), and (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, and the dividing coordinate is defined as y0. The abnormal range is determined by the vertical coordinate.

[0092] Referring to FIG. 4, if y2>y0 and y1>y0, it is indicated that the abnormal picture is located in the first area 110, the first output end 421 outputs a high level, and the compensating module 200 is controlled to be compensated and started. Figure 7 Referring to FIG. 4, if y0>y1 and y0>y2, it is indicated that the abnormal picture is located in the second area 120, the second output end 422 outputs a high level, and the repairing module 300 is controlled to be repaired and started.

[0093] Figure 8 Referring to FIG. 4, if y0>y1 and y0>y2, it is indicated that the abnormal picture is located in the second area 120, the second output end 422 outputs a high level, and the repairing module 300 is controlled to be repaired and started.

[0094] Referring to FIG. 4, if y0>y1 and y0>y2, it is indicated that the abnormal picture is located in the second area 120, the second output end 422 outputs a high level, and the repairing module 300 is controlled to be repaired and started. Figure 9 ​As shown, if y1>y0 but y0>y2, it indicates that the abnormal picture part is located in the first area 110 and also in the second area 120, at this time the first output end 421 and the second output end 422 output high level at the same time, and the compensation module 200 and the repair module 300 compensate at the same time. The boundary line can be the boundary line in the middle of the display panel 100.

[0095] The repair module 300 mainly compensates by inverting the common voltage, and the repair data inverted with the common voltage is easy to attenuate in the extension direction of the line. The second area 120 is closer to the repair module 300, and when the repair module 300 is started when the abnormal picture 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 described above, the positions of the abnormal pictures are determined by comparing y1 and y2 with y0 respectively. The abnormal range is determined by two points. In addition, the abnormal range can also be determined by x1 and x2, or determined 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, there are more vertical coordinates, such as four different coordinates of the vertical coordinate, then two other operational amplifiers 320 are needed to calculate.

[0098] In addition, referring to Figure 10 As shown, the division method of the first area 110 and the second area 120 can also be divided in the vertical direction, and the coordinates of the boundary 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] Referring to Figure 11 As shown, the boundary line is a rectangle, which divides the display area of the display panel 100 into a center area and an edge area, the first area 110 is the center area, and the second area 120 is the edge area.

[0100] In the above embodiment, the control end of the general response switch is the gate, the first end is the source, and the second end is the drain. Alternatively, the first end can be the drain, and the second end can be the source.

[0101] Embodiment two

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

[0103] Other embodiments and advantages of the display apparatus will be apparent from the above description of the control circuitry, and are not described in detail herein.

[0104] Other embodiments of the application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. It is intended that the application cover any and all variations of the application that come within the scope of the general concept of the application. It is intended that the application not be limited to the specific examples disclosed, but will include all variations thereof falling within the scope of the present application.

[0105] It is to be understood that the application is not limited to the precise details of construction and the above-described and shown in the drawings, and that various modifications and changes can be applied to the application without departing from the scope thereof or sacrificing any inventive effect thereof. The scope of the application should be determined by the terms of 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 an image; a repair module, the repair module receiving feedback data of the display panel performing image display and being activated based on the feedback data to provide repair data to the display panel after the image is displayed; a detection module, the detection module receiving display data of the driving display panel, and determining an abnormal range of the abnormal image based on the display data, and controlling the activation of the repair module and / or the compensation module according to the abnormal range; 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, receives the display data provided by the system control chip, and generates the compensation data. A first end of the first interval controller is connected to the image compensation algorithm unit, a second end of the first interval controller is connected to the display panel, and a 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 inverting input terminal of the operational amplifier receives feedback data from 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.

2. The control circuit according to claim 1, wherein: 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.

3. The control circuit according to claim 1, wherein: 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.

4. The control circuit according to claim 3, 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.

5. 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.

6. The control circuit according to claim 3, 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, and the second output end is connected to the repair module, and 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 screen, 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 screen.

7. The control circuit according to claim 6, 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 first comparator has a same-direction input terminal receiving the first real-time coordinates, and a reverse input terminal receiving the boundary coordinates, and the output terminal of the first comparator is a first output terminal 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.

8. The control circuit according to claim 7, characterized in that: defining a display area on the display panel away from the repair module as a first area, a display area close to the repair module as a second area, and 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 activated; 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.

9. A display device, characterized in that: The display device includes a display panel and the control circuit according to any one of claims 1 to 8, the display panel includes a driving chip, and the control circuit is connected to the driving chip of the display panel.

Images