Display compensation method, display chip and display device

Abstract

The invention discloses a display compensation method, a display chip and a display device.The method comprises the steps that a first area and a second area are determined in an image frame to be displayed, the first area is adjacent to the second area, and the driving moment of the first area is earlier than the driving moment of the second area; based on the gray scale data corresponding to the first area and the second area, determining a target backlight compensation value, and compensating the initial backlight data corresponding to the second area according to the target backlight compensation value to obtain target backlight data; and controlling the backlight brightness of the backlight subarea corresponding to the second area according to the target backlight data. By adopting a mode of compensating the backlight data of the backlight subarea corresponding to the gray scale change area in the image frame to be displayed, more accurate gray scale compensation can be realized by means of high-precision setting of the backlight subarea, the purpose of integrally improving the image quality is achieved, and the display performance is optimized.

Description

Technical Field

[0001] The present invention relates to the field of display technologies, and particularly to a display compensation method, a display chip, and a display device. Background Art

[0002] Line-OD (English: Line-Over Drive, Chinese: line over drive) technology is a technology that uses the electric field acceleration effect to improve the response speed of liquid crystal molecules. Specifically, the Line-OD technology can provide an over-drive voltage signal for pixels according to the change of the grayscale data corresponding to each row of pixels in the image frame to be displayed. For example, when it is detected that the pixels in the i-th (i is a positive integer) row correspond to low grayscale data, and the pixels in the (i + 1)-th row correspond to high grayscale data, in order to achieve a fast transition from low grayscale to high grayscale, an over-drive voltage can be provided for the pixels in the (i + 1)-th row through the Line-OD function. This over-drive voltage is higher than the normal voltage corresponding to the target grayscale, so that the pixels in this row can be charged to the voltage level corresponding to the target grayscale faster, so that the liquid crystal molecules in the pixels in this row can be quickly flipped in place, ensuring the accuracy of image display.

[0003] In practical applications, when using the Line-OD technology for pixel grayscale compensation, a partition compensation method is usually adopted. However, limited by factors such as chip design cost and chip computing power, the accuracy of the compensation partition usually cannot be made very high, and the compensation gain is also limited by the grayscale range. These will all result in a low accuracy of Line-OD compensation and an unsatisfactory optimization of the picture display effect. Summary of the Invention

[0004] The present invention provides a display compensation method, a display chip, and a display device to solve the problems of low accuracy of Line-OD compensation and unsatisfactory optimization of the display effect when the existing display device uses the Line-OD technology for display compensation.

[0005] In a first aspect, an embodiment of the present invention provides a display compensation method, including:

[0006] Determine a first region and a second region in the image frame to be displayed, where the first region and the second region are adjacent, and the driving time of the first region is earlier than that of the second region;

[0007] Based on the grayscale data corresponding to the first region and the second region respectively, determine a target backlight compensation value, and compensate the initial backlight data corresponding to the second region according to the target backlight compensation value to obtain target backlight data;

[0008] Control the backlight brightness of the backlight partition corresponding to the second region according to the target backlight data.

[0009] In the display compensation method provided by the embodiment of the present invention, the change situation of the grayscale data of the image frame to be displayed is analyzed, a first region and a second region are determined in the image frame to be displayed, and a target backlight compensation value is determined according to the grayscale data corresponding to the first region and the second region respectively. Then, the initial backlight data corresponding to the second region is compensated by using the target backlight compensation value to obtain the target backlight data corresponding to the second region, and the backlight brightness of the backlight partition corresponding to the second region is controlled according to the target backlight data. By adopting the method of compensating the backlight data of the backlight partition corresponding to the grayscale change region in the image frame to be displayed, the problem that the compensation effect in the conventional Line-OD technology is limited by the grayscale range of the display panel is avoided. And because the setting precision of the backlight partition is relatively high, compared with the low-precision partition compensation method of the conventional Line-OD technology, by compensating the backlight brightness of some backlight partitions, more accurate grayscale compensation can be realized, so as to achieve the purpose of overall improving the image quality and optimizing the display performance.

[0010] In an optional embodiment, the grayscale data corresponding to the first region is different from the grayscale data corresponding to the second region;

[0011] The determining the target backlight compensation value according to the grayscale data corresponding to the first region and the second region respectively includes:

[0012] Determining the grayscale change amount between the grayscale data corresponding to the first region and the grayscale data corresponding to the second region;

[0013] According to the first correspondence and the grayscale change amount, determining the target backlight compensation value, wherein the first correspondence is used to represent the relationship between the grayscale change amount and the backlight compensation value.

[0014] In an optional embodiment, the determining the target backlight compensation value according to the first correspondence and the grayscale change amount includes:

[0015] Based on the grayscale change amount, determining the backlight compensation value corresponding to the grayscale change amount in the first correspondence, and using the determined backlight compensation value as the target backlight compensation value.

[0016] In the above method, during the process of determining the target backlight compensation value, the gray-scale change amount between the first region and the second region can be utilized to search for the backlight compensation value corresponding to this gray-scale change amount in the first correspondence relationship, and the found backlight compensation value is used as the target backlight compensation value, thereby achieving the purpose of determining the target backlight compensation value for backlight compensation according to the gray-scale change conditions of the two regions. The target backlight compensation value determined in this way can improve the problem of unnatural overshoot of gray-scale change that occurs when the display panel undergoes gray-scale change by changing the backlight brightness, and overall improve the picture display effect.

[0017] In an alternative embodiment, the gray-scale data corresponding to the first region is different from the gray-scale data corresponding to the second region;

[0018] Determining the target backlight compensation value based on the gray-scale data corresponding to the first region and the second region respectively includes:

[0019] Based on the second correspondence relationship, the gray-scale data corresponding to the first region, and the gray-scale data corresponding to the second region, determine the target backlight compensation value, where the second correspondence relationship is used to represent the relationship between the initial gray-scale data, the target gray-scale data, and the backlight compensation value.

[0020] In the above method, during the process of determining the target backlight compensation value, the gray-scale data corresponding to the first region can also be used as the initial gray-scale data, and the gray-scale data corresponding to the second region can be used as the target gray-scale data. Then, search for the backlight compensation value corresponding to the above initial gray-scale data and target gray-scale data in the second correspondence relationship, and use the found backlight compensation value as the target backlight compensation value, thereby achieving the purpose of determining the target backlight compensation value for backlight compensation according to the gray-scale change conditions of the two regions. The target backlight compensation value determined in this way can improve the problem of unnatural overshoot of gray-scale change that occurs when the display panel undergoes gray-scale change by changing the backlight brightness, and overall improve the picture display effect.

[0021] In an alternative embodiment, the target backlight compensation value is a target backlight compensation coefficient;

[0022] Compensating the initial backlight data corresponding to the second region according to the target backlight compensation value to obtain the target backlight data includes:

[0023] Determine the target backlight data according to the product of the target backlight compensation coefficient and the initial backlight data.

[0024] In the above method, the determined target backlight compensation value can be a target backlight compensation coefficient. According to the gray-scale change situation between the first region and the second region, this target backlight compensation coefficient can be greater than 1 or less than 1. In this way, according to the product of the target backlight compensation coefficient and the initial backlight data, the target backlight compensation data corresponding to the second region can be determined, realizing the backlight compensation for the second region, effectively improving the problem of overly uneven gray-scale in the second region caused by the gray-scale change between the second region and the first region, and thus overall improving the picture display effect.

[0025] In an alternative embodiment, the target backlight compensation value is a target backlight compensation increment;

[0026] Compensating the initial backlight data corresponding to the second region according to the target backlight compensation value to obtain target backlight data includes:

[0027] Determining the target backlight data according to the sum value of the target backlight compensation increment and the initial backlight data.

[0028] In the above method, the determined target backlight compensation value can be a target backlight compensation increment. According to the gray-scale change situation between the first region and the second region, this target backlight compensation increment can be a positive number or a negative number. In this way, according to the sum value of the target backlight compensation increment and the initial backlight data, the target backlight compensation data corresponding to the second region can be determined, realizing the backlight compensation for the second region, effectively improving the problem of overly uneven gray-scale in the second region caused by the gray-scale change between the second region and the first region, and thus overall improving the picture display effect.

[0029] In an alternative embodiment, the to-be-displayed image frame includes a plurality of gray-scale data, and the plurality of gray-scale data respectively correspond to a plurality of pixels in the pixel array;

[0030] Determining the first region and the second region in the to-be-displayed image frame includes:

[0031] For a plurality of gray-scale data corresponding to the same column of pixels, selecting a first gray-scale data and a second gray-scale data from the plurality of gray-scale data, wherein a pixel corresponding to the first gray-scale data is adjacent to a pixel corresponding to the second gray-scale data;

[0032] Determining the first region in the to-be-displayed image frame according to the determined first gray-scale data, and determining the second region in the to-be-displayed image frame according to the determined second gray-scale data.

[0033] The above method can analyze the change situation of the grayscale data corresponding to the pixels in the same column, determine the first area and the second area in the image frame to be displayed. The first area is adjacent to the second area, and the driving time of the first area is earlier than that of the second area, so as to achieve accurate area division, accurately locate the second area where the grayscale transition may be uneven, and facilitate the subsequent implementation of display compensation.

[0034] In an alternative embodiment, for the multiple grayscale data corresponding to the pixels in the same column, selecting the first grayscale data and the second grayscale data from the multiple grayscale data includes:

[0035] Determine the data difference between any two adjacent grayscale data among the multiple grayscale data;

[0036] In the preset order, compare the magnitude relationship between each data difference and the preset threshold in turn, and according to the comparison result, determine the first grayscale data and the second grayscale data from the multiple grayscale data, where the preset order is determined according to the scanning driving order.

[0037] In an alternative embodiment, according to the comparison result, determining the first grayscale data and the second grayscale data from the multiple grayscale data includes:

[0038] When it is recognized that the data difference is greater than the preset threshold, use this data difference as the target data difference;

[0039] Take the grayscale data corresponding to the multiple data differences that are before the target data difference and less than or equal to the preset threshold in the preset order, and the first grayscale data among the two grayscale data used to determine the target data difference in the preset order as the first grayscale data;

[0040] Take the grayscale data corresponding to the multiple data differences that are after the target data difference and less than or equal to the preset threshold in the preset order, and the second grayscale data among the two grayscale data used to determine the target data difference in the preset order as the second grayscale data.

[0041] The above method can determine the position where the grayscale data changes greatly through the data difference between every two adjacent grayscale data among the multiple grayscale data corresponding to the pixels in the same column, and select the first grayscale data and the second grayscale data from the multiple grayscale data based on this, so as to realize the determination of the first area and the second area. The grayscale data gap between the two selected areas is large, and it is more likely to have the problem of uneven grayscale transition. Targeted compensation is carried out in the subsequent process, which can improve the overall display effect of the picture.

[0042] In an alternative embodiment, determining the second region in the image frame to be displayed according to the determined second grayscale data includes:

[0043] Select third grayscale data from the determined second grayscale data, where the driving time of the pixels corresponding to the third grayscale data is earlier than the driving time of the pixels corresponding to other second grayscale data, and the other second grayscale data is the second grayscale data other than the third grayscale data in the determined second grayscale data;

[0044] Use the image region corresponding to the third grayscale data on the image frame to be displayed as the second region.

[0045] The above method can use the first few rows of the second grayscale data among the determined multiple second grayscale data as the third grayscale data, and use the image region corresponding to the third grayscale data on the image frame to be displayed as the second region. The determined second region is the region where gray level over - unevenness is likely to occur during gray level change, and targeted display compensation is performed on it to improve the display problem of gray level over - unevenness in the second region and optimize the screen display effect.

[0046] In a second aspect, an embodiment of the present invention provides a display chip, including:

[0047] A region determination module, configured to determine a first region and a second region in an image frame to be displayed, where the first region and the second region are adjacent, and the driving time of the first region is earlier than the driving time of the second region;

[0048] A backlight compensation module, configured to determine a target backlight compensation value based on the grayscale data corresponding to the first region and the second region respectively, and compensate the initial backlight data corresponding to the second region according to the target backlight compensation value to obtain target backlight data;

[0049] A backlight control module, configured to control the backlight brightness of the backlight partition corresponding to the second region according to the target backlight data.

[0050] In an alternative embodiment, the grayscale data corresponding to the first region is different from the grayscale data corresponding to the second region;

[0051] The backlight compensation module is specifically configured to:

[0052] Determine the gray level change amount between the grayscale data corresponding to the first region and the grayscale data corresponding to the second region;

[0053] Determine the target backlight compensation value according to the first correspondence relationship and the gray level change amount, where the first correspondence relationship is used to represent the relationship between the gray level change amount and the backlight compensation value.

[0054] In an alternative embodiment, the backlight compensation module is specifically configured to:

[0055] Based on the grayscale change amount, determine the backlight compensation value corresponding to the grayscale change amount in the first correspondence relationship, and use the determined backlight compensation value as the target backlight compensation value.

[0056] In an alternative embodiment, the grayscale data corresponding to the first region is different from the grayscale data corresponding to the second region;

[0057] The backlight compensation module is specifically configured to:

[0058] Based on the second correspondence relationship, the grayscale data corresponding to the first region, and the grayscale data corresponding to the second region, determine the target backlight compensation value, where the second correspondence relationship is used to represent the relationship between the initial grayscale data, the target grayscale data, and the backlight compensation value.

[0059] In an alternative embodiment, the target backlight compensation value is a target backlight compensation coefficient;

[0060] The backlight compensation module is specifically configured to:

[0061] Determine the target backlight data according to the product of the target backlight compensation coefficient and the initial backlight data.

[0062] In an alternative embodiment, the target backlight compensation value is a target backlight compensation increment;

[0063] The backlight compensation module is specifically configured to:

[0064] Determine the target backlight data according to the sum of the target backlight compensation increment and the initial backlight data.

[0065] In an alternative embodiment, the image frame to be displayed includes a plurality of grayscale data, and the plurality of grayscale data respectively correspond to a plurality of pixels in the pixel array;

[0066] The region determination module is specifically configured to:

[0067] For the plurality of grayscale data corresponding to the same column of pixels, select a first grayscale data and a second grayscale data from the plurality of grayscale data, where a pixel corresponding to the first grayscale data is adjacent to a pixel corresponding to the second grayscale data;

[0068] Determine the first region in the image frame to be displayed according to the determined first grayscale data, and determine the second region in the image frame to be displayed according to the determined second grayscale data.

[0069] In an alternative embodiment, the region determination module is specifically configured to:

[0070] Determine the data difference between any two adjacent grayscale data among the multiple grayscale data,

[0071] Compare the magnitude relationship between each data difference and a preset threshold in sequence according to a preset order, and determine the first grayscale data and the second grayscale data among the multiple grayscale data according to the comparison result, where the preset order is determined according to the scan driving order.

[0072] In an alternative embodiment, the region determination module is specifically configured to:

[0073] When it is recognized that the data difference is greater than the preset threshold, use this data difference as the target data difference;

[0074] Use the grayscale data corresponding to multiple data differences that are before the target data difference in the preset order and are less than or equal to the preset threshold, and the first grayscale data among the two grayscale data used to determine the target data difference in the preset order, as the first grayscale data;

[0075] Use the grayscale data corresponding to multiple data differences that are after the target data difference in the preset order and are less than or equal to the preset threshold, and the second grayscale data among the two grayscale data used to determine the target data difference in the preset order, as the second grayscale data.

[0076] In an alternative embodiment, the region determination module is specifically configured to:

[0077] Select a third grayscale data from the determined second grayscale data, where the driving time of the pixel corresponding to the third grayscale data is earlier than the driving time of the pixels corresponding to other second grayscale data, and the other second grayscale data are the second grayscale data except the third grayscale data among the determined second grayscale data;

[0078] Use the image region corresponding to the third grayscale data on the image frame to be displayed as the second region.

[0079] In a third aspect, an embodiment of the present invention provides a display device, including a display panel, a backlight panel, and a display chip as described in any one of the embodiments in the second aspect above, where:

[0080] The display chip is electrically connected to the display panel and the backlight panel respectively, and the display panel and the backlight panel are disposed opposite to each other.

[0081] For the possible technical effects that can be achieved by the display chip disclosed in the second aspect and the display device disclosed in the third aspect above, please refer to the technical effects that can be achieved by the first aspect or various possible solutions in the first aspect above, and details will not be repeated here. Description of the Drawings

[0082] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0083] Figure 1 Schematic structural diagram of a liquid crystal display panel provided by the related art;

[0084] Figure 2 Schematic diagram of image display of a liquid crystal display panel provided by the related art;

[0085] Figure 3 Schematic timing diagram of display of a liquid crystal display device provided by the related art;

[0086] Figure 4 Schematic diagram of display effect of a liquid crystal display device provided by the related art;

[0087] Figure 5 Schematic structural diagram of a display device provided by an embodiment of the present invention;

[0088] Figure 6 Schematic structural diagram of a backlight panel provided by an embodiment of the present invention;

[0089] Figure 7 Schematic workflow diagram of a display compensation method provided by an embodiment of the present invention;

[0090] Figure 8 Schematic diagram of determining the area of a frame of an image to be displayed provided by an embodiment of the present invention;

[0091] Figure 9 Schematic diagram of image display of a display device provided by an embodiment of the present invention;

[0092] Figure 10 Schematic timing diagram of display of a display device provided by an embodiment of the present invention;

[0093] Figure 11 Schematic module structure diagram of a display chip provided by an embodiment of the present invention. Detailed Embodiments

[0094] To make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

[0095] It should be noted that the terms "first", "second", etc. in the description and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily need to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present invention described here can be implemented in an order other than those illustrated or described here. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present invention as detailed in the appended claims.

[0096] In a liquid crystal display device (abbreviation: LCD, English: Liquid Crystal Display), a pixel unit usually consists of a pixel electrode, a common electrode, and liquid crystal molecules located between the pixel electrode and the common electrode. Therefore, the pixel unit can be regarded as a capacitive structure. On the one hand, by writing the voltage corresponding to the display data to the pixel electrode, the electric field inside the capacitive structure can be changed. The change of the electric field inside the capacitive structure will affect the arrangement state of the liquid crystal molecules therein, and then control the transmission or blocking of light, affecting the light transmittance. On the other hand, this capacitive structure can ensure that the pixel unit can maintain the voltage level required for display and ensure the normal display of the image.

[0097] However, the state change of liquid crystal molecules requires a certain response time, that is, when the input image signal changes, the liquid crystal molecules need a period of time to change their own arrangement state to display the correct image. Therefore, the shorter the response time required by the liquid crystal molecules, the better the image display effect, especially when displaying fast-moving images.

[0098] To optimize the image display effect, the Line-OD technology is proposed. The Line-OD technology is a technology that uses the electric field acceleration effect to improve the response speed of liquid crystal molecules. It analyzes the change trend of the image signal, especially the gray-scale change of each row of pixels, and provides an adjusted voltage signal, that is, an over-driving voltage signal, to the pixel electrodes of one or more rows of pixels that need to be compensated.

[0099] Specifically, when it is detected that a certain row of pixels corresponds to low gray-scale data while the next row of pixels corresponds to high gray-scale data, since there is a large gap between the driving voltage corresponding to the low gray-scale data and the driving voltage corresponding to the high gray-scale data, in order to achieve a rapid conversion from low gray-scale to high gray-scale, the Line-OD technology can be used to provide an over-driving voltage for the next row of pixels. This over-driving voltage will be higher than the normal voltage corresponding to the target gray-scale (i.e., high gray-scale data), so that the pixels in that row can be charged to the voltage level corresponding to the target gray-scale faster to accelerate the twisting of the liquid crystal molecules, enabling the liquid crystal molecules in the pixels of that row to quickly flip into place. And once the liquid crystal molecules approach the target state, the voltage can be adjusted back to the normal voltage corresponding to the target gray-scale to maintain a stable display.

[0100] In practical applications, since the multiple rows of pixels set in the display device adopt a progressive scanning display mode, different rows of pixels may be in different gray-scale conversion states. Therefore, when using the Line-OD technology for pixel gray-scale compensation, appropriate driving voltage signals can be independently provided for each row of pixels according to the real-time requirements of each row of pixels, thereby improving the overall display quality of the image.

[0101] However, limited by factors such as chip design cost and chip computing power, the accuracy of the compensation partition usually cannot be made very high. For example, for a liquid crystal display device with a 4K resolution, it is set with pixels of 3840×2160 specifications. But when performing Line-OD compensation, the accuracy of its corresponding compensation partition can only reach 17×17 or 33×33. The compensation gain values corresponding to the pixels in each compensation partition are the same, which will result in inaccurate gray-scale compensation.

[0102] In addition, the compensation gain of Line-OD compensation is also limited by the gray-scale range. Taking 8-bit display data as an example, its corresponding gray-scale range is 0 to 255. Then when the pixel unit switches from a higher gray-scale to a lower gray-scale, or from a lower gray-scale to a higher gray-scale, due to the limitation of the gray-scale range, there will be a problem of insufficient compensation gain value. For example, when a pixel needs to switch from gray-scale 50 to gray-scale 250, since the upper limit of the gray-scale range is 255, at most only the voltage values corresponding to 5 gray-scales can be compensated. Even when a pixel switches from gray-scale 0 to gray-scale 255, or from gray-scale 255 to gray-scale 0, gray-scale compensation cannot be performed through the Line-OD technology. This will result in a low accuracy rate of Line-OD compensation and an unsatisfactory optimization of the screen display effect.

[0103] Figure 1 shows a schematic structural diagram of a liquid crystal display panel provided by the related art. As Figure 1As shown, on a liquid crystal display panel (English: Open Cell, abbreviated as OC) 10, there are a pixel array composed of liquid crystal molecules, a source driver chip (English: Source Driver IC) 11, and a gate driver chip (English: Gate Driver IC) 12. Among them, the pixel array includes pixels 13 arranged in M×N, that is, each row in the pixel array includes M pixels 13, and each column includes N pixels 13; the source driver chip 11 is electrically connected to each pixel 13 through a data line 11-A, and is used to write grayscale data into the corresponding pixel 13; the gate driver chip 12 is electrically connected to each pixel 13 through a scan line 12-A, and is used to send a driving voltage signal to the corresponding pixel 13.

[0104] Figure 2 FIG. shows a schematic diagram of image display of a liquid crystal display panel provided by the related art. As Figure 2 shown, the liquid crystal display panel 10 can support image display of 8-bit grayscale data, that is, for the image displayed on the liquid crystal display panel 10, the value range of the corresponding grayscale data is 0 to 255. Referring to Figure 2 , when the liquid crystal display panel 10 displays the image 20, the displayed image 20 can be regarded as composed of 4 regions: namely, region A, region B, region C, and region D. Among them, the grayscale data corresponding to region A and region B is 192, and the grayscale data corresponding to region C and region D is 63.

[0105] Referring to Figure 2 , taking any data line 11-A set on the liquid crystal display panel 10 as an example, in the multiple image regions passed by the data line 11-A, a grayscale change occurs at the junction of region D and region A, and its grayscale data changes from 63 to 192; a grayscale change also occurs at the junction of region B and region C, and its grayscale data changes from 192 to 63. When the grayscale data changes, the liquid crystal molecules need a certain time to change the arrangement state to display the correct image.

[0106] Figure 3 FIG. shows a schematic diagram of the display timing of a liquid crystal display device provided by the related art. As Figure 3 shown, during the process of the liquid crystal display device displaying the image 20, the backlight panel adopts a global dimming technology, and the backlight brightness provided by the entire backlight panel is a fixed brightness.

[0107] Referring to Figure 3, the grayscale change corresponding to the liquid crystal display panel 10 is as follows: 63 grayscales can be normally displayed in area D, and 192 grayscales can be normally displayed in area B. However, it needs to be converted from 63 grayscales to 192 grayscales in area A, and from 192 grayscales to 63 grayscales in area C. The backlight panel continuously provides the backlight brightness corresponding to 255 grayscales for the liquid crystal display panel 10. At this time, the overall display situation of the liquid crystal display device is: normal display in areas D and B, while in area A, due to the conversion from a low grayscale (63 grayscales) to a high grayscale (192 grayscales) in the liquid crystal display panel 10, therefore, an over - transition effect of grayscales will also be presented in the overall display. Similarly, in area C, due to the conversion from a high grayscale (192 grayscales) to a low grayscale (63 grayscales) in the liquid crystal display panel 10, therefore, an over - transition effect of grayscales will also be correspondingly presented in the overall display.

[0108] Figure 4 FIG. shows a schematic diagram of the display effect of a liquid crystal display device provided by the related art. As Figure 4 shown, during the actual display of the image 20 in the liquid crystal display device 30, an over - transition change of grayscales from dark to light will be presented in area A of the image 20, and an over - transition change of grayscales from light to dark will be presented in area C of the image 20, resulting in the problem of uneven grayscale change in the display of the image 20.

[0109] Based on this, the embodiments of the present invention provide a display compensation method, a display chip, and a display device. Aiming at the problems of poor accuracy and unsatisfactory compensation effect of Line - OD compensation in the existing display device, backlight compensation is performed on the backlight partitions corresponding to the image areas with grayscale changes to improve the problem of unsatisfactory grayscale compensation effect, thereby improving the overall display quality of the picture and optimizing the display effect.

[0110] The realization of the purpose, functional characteristics, and advantages of the present invention will be further described with reference to the embodiments and the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention. And without conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0111] The following specifically introduces the display compensation method provided by the embodiments of the present invention with reference to the accompanying drawings:

[0112] Before introducing the specific working process of the display compensation method provided by the embodiments of the present invention, first introduce the structure of the display device provided by the embodiments of the present invention, which is specifically as follows:

[0113] Figure 5 FIG. shows a schematic diagram of the structure of a display device provided by the embodiments of the present invention. As Figure 5As shown in the figure, the display device 40 may include a display panel 41, a backlight panel 42, and a display chip 43. Among them, the display chip 43 is respectively connected to the display panel 41 and the backlight panel 42. The display panel 41 and the backlight panel 42 are arranged opposite to each other, and the display panel 41 is located on the light-emitting side of the backlight panel 42. Among them, a dimming controller 421, a plurality of dimmers (English: Dimmer) 422, and a plurality of light-emitting units 423 are provided on the backlight panel 42; the dimmer 421 is electrically connected to the cathodes of at least one light-emitting unit 423, and the anodes of the light-emitting units 423 are electrically connected to the power supply terminal VDD.

[0114] In addition, the display panel 41 provided by the embodiments of the present invention may adopt the design architecture as shown above Figure 1 Of course, other design architectures may also be adopted, and the embodiments of the present invention do not impose any restrictions on this. For the convenience of description, the following embodiments will be described by taking the display panel 41 adopting the design architecture as shown Figure 1 as an example:

[0115] In a specific implementation, the display chip 43 may respectively send the grayscale data corresponding to the display image to the display panel 41 and the backlight panel 42. After receiving the grayscale data, the display panel 41, on the one hand, will write the driving voltage signal corresponding to the grayscale data into the pixel electrodes of the corresponding pixels through the data line, and on the other hand, will generate a scanning signal according to the preset scanning sequence and send the scanning signal to the corresponding pixel rows in an orderly manner through the scanning line for display driving.

[0116] Among them, the display compensation method provided by the embodiments of the present invention can be applied in the display chip 43. Specifically, the display chip may adopt a TCON (English: Timing Controller, Chinese: Timing Controller) chip, an MCU (English: Microcontroller Unit, Chinese: Micro Control Unit), etc.

[0117] Furthermore, the display device 40 provided by the embodiments of the present invention adopts local dimming technology. Figure 6 The structural schematic diagram of a backlight panel provided by the embodiments of the present invention is shown. As Figure 6 shown, the backlight panel 42 is divided into a plurality of backlight zones 424. One backlight zone 424 may include one or more dimmers and at least one light-emitting unit connected to the dimmer. The backlight brightness of each backlight zone 424 is independent of each other. Through this dimming method, the image displayed on the display panel 41 can have better color contrast, and the display effect of the image frame seen by the human eye will be better.

[0118] Based on the display device architecture as shown Figures 5 - 6 above, the working process of the display compensation method provided by the embodiments of the present invention will be specifically introduced:

[0119] Figure 7 shows a schematic workflow diagram of a display compensation method provided by an embodiment of the present invention. As Figure 7 shown, the display compensation method provided by the embodiment of the present invention may include the following steps:

[0120] Step S701, determine a first region and a second region in the image frame to be displayed, where the first region and the second region are adjacent, and the driving time of the first region is earlier than that of the second region.

[0121] Among them, the grayscale data corresponding to the first region is different from the grayscale data corresponding to the second region.

[0122] In a specific implementation, corresponding to a plurality of pixels included in the pixel array of the display panel 41, the image frame to be displayed includes a plurality of grayscale data, and one grayscale data corresponds to one pixel. For example, assuming that the display panel 41 has a 4K resolution, then 3840×2160 pixels are arranged in an array on the display panel 41, that is, 3840 pixels are arranged in the row direction and 2160 pixels are arranged in the column direction. Correspondingly, the display data corresponding to the image frame to be displayed is grayscale data of a 3840×2160 specification.

[0123] In the embodiment of the present invention, the display chip 43 can analyze the plurality of grayscale data included in the image frame to be displayed, and determine the first region and the second region in the image frame to be displayed according to the analyzed grayscale change situation. That is, in the process of executing step S701, the following method can be specifically adopted:

[0124] Step S701-1, for the plurality of grayscale data corresponding to the same column of pixels, the display chip 43 can select a first grayscale data and a second grayscale data from the plurality of grayscale data, where a pixel corresponding to the first grayscale data is adjacent to a pixel corresponding to the second grayscale data.

[0125] In a specific implementation, the display chip 43 can analyze the grayscale change situation of the plurality of grayscale data corresponding to the same column of pixels, and according to the analysis result, select the first grayscale data and the second grayscale data from the plurality of grayscale data corresponding to the same column of pixels, and the grayscale change amount between the first grayscale data and the second grayscale data is relatively large. Specifically as follows:

[0126] In some embodiments, the display chip 43 can determine the data difference between any two adjacent grayscale data among the plurality of grayscale data corresponding to the same column of pixels; then, compare the size relationship between each data difference and a preset threshold in a preset order, and according to the comparison result, determine the first grayscale data and the second grayscale data from the plurality of grayscale data, where the preset order is determined according to the scan driving order.

[0127] In a specific implementation, the display device 40 may adopt a scanning driving sequence from top to bottom (i.e., along the column direction). The preset sequence is consistent with the scanning driving sequence and is also along the column direction. In this way, the display chip 43 can determine the gray-scale change situation along the column direction by calculating the data difference between the gray-scale data corresponding to every two adjacent pixels in the same column. Then, by comparing the size relationship between each data difference and the preset threshold according to the preset sequence, the position where the gray scale changes can be defined.

[0128] In one implementation manner, the preset threshold may be a fixed value; the display chip 43 can compare the absolute value of each data difference with the preset threshold to define the position where the gray scale changes. For example, when the absolute value of the data difference is less than or equal to the preset threshold, it indicates that the gray-scale data has not changed significantly; while when the absolute value of the data difference is greater than the preset threshold, it indicates that the gray-scale data has changed significantly, and thus the position where the gray scale changes can be defined.

[0129] In another implementation manner, the preset threshold may also be a range threshold; the display chip 43 can compare the size relationship between each data difference and the range preset threshold to define the position where the gray scale changes. For example, when the data difference is within the preset threshold, it indicates that the gray-scale data has not changed significantly; while when the data difference is outside the preset threshold, it indicates that the gray-scale data has changed significantly, and thus the position where the gray scale changes can be defined.

[0130] In some embodiments, when it is recognized that the data difference is greater than the preset threshold, the display chip 43 may use this data difference as the target data difference; then, the gray-scale data corresponding to multiple data differences that are before the target data difference and less than or equal to the preset threshold in the preset sequence, and the first gray-scale data among the two gray-scale data used to determine the target data difference in the preset sequence are used as the first gray-scale data; the gray-scale data corresponding to multiple data differences that are after the target data difference and less than or equal to the preset threshold in the preset sequence, and the second gray-scale data among the two gray-scale data used to determine the target data difference in the preset sequence are used as the second gray-scale data.

[0131] For easy understanding, a simple example is given below: Suppose a column includes 10 pixels, and the corresponding gray-scale data are: g1, g2, …, g10. Then the display chip 43 can determine 9 data differences based on these 10 gray-scale data (g1~g10), which are: Δg1 = g2 - g1, Δg2 = g3 - g2, Δg3 = g4 - g3, …, Δg9 = g10 - g9.

[0132] Then, compare the magnitudes of these 9 data differences with the preset threshold gth respectively. Assume that only the data difference Δg4 > the preset threshold gth, and the rest of the data differences are all ≤ the preset threshold gth. Then, take the data difference Δg4 as the target data difference. Since the data differences before the target data difference Δg4 are: Δg1, Δg2, and Δg3, and the gray-scale data used to determine Δg4 are g4 and g5 respectively, then take the gray-scale data used to determine Δg1, Δg2, and Δg3, and the previous gray-scale data in the gray-scale data used to determine Δg4, that is, the gray-scale data g4, as the first gray-scale data together. That is, the first gray-scale data is: g1, g2, g3, g4.

[0133] Since the data differences after the target data difference Δg4 are: Δg5, Δg6, Δg7, Δg8, and Δg9, and the gray-scale data used to determine Δg4 are g4 and g5 respectively, then take the gray-scale data used to determine Δg5, Δg6, Δg7, Δg8, and Δg9, and the next gray-scale data in the gray-scale data used to determine Δg4, that is, the gray-scale data g5, as the second gray-scale data together. That is, the second gray-scale data is: g5, g6, g7, g8, g9, g10.

[0134] In addition, in the embodiments of the present invention, the preset order can be determined according to the scanning order of the display panel 41. For example, when the display panel 41 performs forward scanning drive in the order from top to bottom, the preset order is also the order from top to bottom.

[0135] Therefore, by the data difference between every two adjacent gray-scale data among the multiple gray-scale data corresponding to the same column of pixels, determine the position where the gray-scale data changes greatly, and select the first gray-scale data and the second gray-scale data from the multiple gray-scale data accordingly, so as to realize the determination of the first region and the second region. In this way, the gray-scale data gap between the two selected regions is large, and it is easier to have the problem of uneven gray-scale transition. Then, perform targeted compensation on it in the subsequent process, which can improve the overall display effect of the picture.

[0136] Step S701-2, the display chip 43 can determine the first region in the image frame to be displayed according to the determined first gray-scale data, and determine the second region in the image frame to be displayed according to the determined second gray-scale data.

[0137] In a specific implementation, the display chip 43 can take the image region corresponding to the first gray-scale data on the image frame to be displayed as the first region, and can determine the second region in the following way:

[0138] In some embodiments, the display chip 43 may select third grayscale data from the determined second grayscale data, and use the image area corresponding to the third grayscale data on the image frame to be displayed as the second area; wherein, the driving time of the pixels corresponding to the third grayscale data is earlier than the driving time of the pixels corresponding to other second grayscale data, and the other second grayscale data are the second grayscale data other than the third grayscale data in the determined second grayscale data.

[0139] In a specific implementation, the display chip 43 may use the first few rows of the determined second grayscale data as the third grayscale data, and use the image area corresponding to the third grayscale data on the image frame to be displayed as the second area. In this way, the determined second area is the area where grayscale over - unevenness is likely to occur during grayscale change. It can accurately locate the problem area and perform targeted display compensation on it to improve the problem of uneven grayscale display in the second area and optimize the screen display effect.

[0140] Furthermore, it should be understood that the first area and the second area in the image frame to be displayed are used to represent two adjacent image areas with different grayscale data from each other. In practical applications, the display chip 43 may determine multiple first areas and multiple second areas in the image frame to be displayed, and the embodiments of the present invention do not impose any restrictions on this.

[0141] Figure 8 Shows a schematic diagram of the area determination of an image frame to be displayed provided by an embodiment of the present invention. As Figure 8 shown, (a) is a schematic diagram of the image frame 50 to be displayed. Referring to (a), it can be seen that there are 2 different grayscales on the image frame 50 to be displayed, which are represented by different fillings, that is, the grayscale corresponding to area D1 is G1, and the grayscale corresponding to area D2 is G2; and the scanning drive sequence corresponding to the image frame 50 to be displayed is from top to bottom.

[0142] (b) is a schematic diagram of determining the first area and the second area in the image frame 50 to be displayed. Referring to (b), it can be seen that with the scanning drive from top to bottom, area D1 will be used as the first area first, and a partial area adjacent to area D1 in area D2 will be used as the second area.

[0143] (c) is another schematic diagram of determining the first area and the second area in the image frame 50 to be displayed. Referring to (c), after the display compensation for the second area in (b) (see subsequent embodiments for details), with the continuation of the scanning drive, area D2 will be used as the first area, and a partial area adjacent to area D2 in area D1 will be used as the second area to perform display compensation on the second area in (c).

[0144] After introducing the specific implementation methods of the above area determination, the following specifically introduces the display compensation operation process of the second area:

[0145] Step S702: Based on the grayscale data corresponding to the first area and the second area respectively, determine the target backlight compensation value, and compensate the initial backlight data corresponding to the second area according to the target backlight compensation value to obtain the target backlight data.

[0146] In specific implementation, the display chip 43 determines the target backlight compensation value based on the grayscale data corresponding to the first area and the second area respectively. There are at least the following two feasible implementation methods:

[0147] Method 1:

[0148] In some embodiments, the display chip 43 can determine the grayscale change amount between the grayscale data corresponding to the first area and the grayscale data corresponding to the second area; and determine the target backlight compensation value according to the first correspondence relationship and the grayscale change amount, where the first correspondence relationship is used to represent the relationship between the grayscale change amount and the backlight compensation value.

[0149] In specific implementation, the display chip 43 can calculate the difference between the grayscale data corresponding to the second area and the grayscale data corresponding to the first area, and use the obtained difference as the grayscale change amount. For example, assume that the grayscale data corresponding to the second area is 192 and the grayscale data corresponding to the first area is 63, then the grayscale change amount is: 192 - 63 = 129; assume that the grayscale data corresponding to the second area is 63 and the grayscale data corresponding to the first area is 192, then the grayscale change amount is: 63 - 192 = -129.

[0150] Further, after the display chip 43 determines the grayscale change amount, it can specifically determine the target backlight compensation value through the following method: The display chip 43 can determine the backlight compensation value corresponding to the grayscale change amount in the first correspondence relationship based on the grayscale change amount, and use the determined backlight compensation value as the target backlight compensation value.

[0151] In the embodiment of the present invention, the first correspondence relationship can be determined through the following method: In the factory debugging stage of the display device 40, use an image acquisition device to obtain the display data corresponding to each of the multiple test image frames displayed by the display device 40; then, send the obtained display data to the display chip 43 of the display device. After receiving the display data, the display chip 43 performs display analysis on it to determine the display defect problems presented by the display device 40; finally, construct the first correspondence relationship according to the results of the display analysis.

[0152] The following table shows an example of the first correspondence relationship. It should be understood that the following example is for reference only:

[0153]

[0154]

[0155] Table 1

[0156] For example, assume that the gray scale change amount determined by the display chip 43 is ΔG2, then a2 can be determined from Table 1 as the target backlight compensation value.

[0157] Therefore, in the process of determining the target backlight compensation value, the gray scale change amount between the first region and the second region can be utilized to look up the backlight compensation value corresponding to the gray scale change amount in the first correspondence relationship, and the found backlight compensation value is used as the target backlight compensation value, so as to achieve the purpose of determining the target backlight compensation value for backlight compensation according to the gray scale change conditions of the two regions. The target backlight compensation value determined in this way can change the backlight brightness to improve the problem of unnatural over - change of gray scale when the display panel undergoes gray scale change, and overall improve the picture display effect.

[0158] Method 2:

[0159] In some embodiments, the display chip 43 can determine the target backlight compensation value based on the second correspondence relationship, the gray scale data corresponding to the first region, and the gray scale data corresponding to the second region, where the second correspondence relationship is used to characterize the relationship between the initial gray scale data, the target gray scale data, and the backlight compensation value.

[0160] In a specific implementation, the display chip 43 can use the gray scale data corresponding to the first region as the initial gray scale data, and the gray scale data corresponding to the second region as the target gray scale data. Then, look up the backlight compensation value corresponding to the above - mentioned initial gray scale data and target gray scale data in the second correspondence relationship, and use the found backlight compensation value as the target backlight compensation value.

[0161] The following table shows an example of the second correspondence relationship. It should be understood that the following example is for reference only:

[0162]

[0163]

[0164] Table 2

[0165] For example, assume that the display chip 43 recognizes that the gray scale data corresponding to the first region is 63, i.e., g_i = 63, and the gray scale data corresponding to the second region is 192, i.e., g_t = 192. Since 51 ≤ g_i = 63 ≤ 100 and 151 ≤ g_t = 192 ≤ 200, then b7 can be determined from Table 2 as the target backlight compensation value.

[0166] In addition, in the embodiments of the present invention, the determination method of the second corresponding relationship is similar to that of the first corresponding relationship. The specific implementation can refer to the determination method of the first corresponding relationship in Method 1, so it will not be elaborated here.

[0167] Therefore, through the above method, the purpose of determining the target backlight compensation value for backlight compensation according to the gray-scale change conditions of two regions can be achieved. The determined target backlight compensation value can change the backlight brightness to improve the problem of unnatural over-transition of gray-scale change when the display panel undergoes gray-scale change, and overall improve the picture display effect.

[0168] Furthermore, regardless of whether Method 1 or Method 2 is adopted above, after determining the target backlight compensation value, the display chip 43 will perform compensation calculation on the initial backlight data corresponding to the second region by using the target backlight compensation value to obtain the target backlight data corresponding to the second region. The specific compensation method is related to the form of the target backlight compensation value, which is as follows:

[0169] In one implementation, the target backlight compensation value can be a target backlight compensation coefficient; the display chip 43 can determine the target backlight data corresponding to the second region according to the product of the target backlight compensation coefficient and the initial backlight data.

[0170] In a specific implementation, the target backlight compensation value determined by the display chip 43 according to the gray-scale change conditions between the first region and the second region can be a target backlight compensation coefficient; then, the product of the target backlight compensation coefficient and the initial backlight data is used as the target backlight data.

[0171] Among them, when the gray-scale data corresponding to the second region is greater than the gray-scale data corresponding to the first region, the target backlight compensation coefficient determined by the display chip 43 is greater than 1. In this way, the target backlight data determined according to the product of the target backlight compensation coefficient and the initial backlight data will be greater than the initial backlight data. When using the target backlight data to drive the backlight brightness of the backlight partition corresponding to the second region, the actual backlight brightness of this part of the backlight partition will be greater than the original backlight brightness, thereby making the overall brightness of the second region reach the ideal brightness.

[0172] When the gray-scale data corresponding to the second region is less than the gray-scale data corresponding to the first region, the target backlight compensation coefficient determined by the display chip 43 is less than 1. In this way, the target backlight data determined according to the product of the target backlight compensation coefficient and the initial backlight data will be less than the initial backlight data. When using the target backlight data to drive the backlight brightness of the backlight partition corresponding to the second region, the actual backlight brightness of this part of the backlight partition will be less than the original backlight brightness, thereby making the overall brightness of the second region reach the ideal brightness.

[0173] For example, assume that the determined target backlight compensation coefficient is 1.5 and the initial backlight data is 192. Then the target backlight data is: 192 × 1.5 = 288. Assume that the determined target backlight compensation coefficient is 0.8 and the initial backlight data is 195. Then the target backlight data is: 195 × 0.8 = 156.

[0174] In another implementation, the target backlight compensation value can be the target backlight compensation increment; the display chip 43 can determine the target backlight data according to the sum of the target backlight compensation increment and the initial backlight data.

[0175] In a specific implementation, the target backlight compensation value determined by the display chip 43 according to the gray-scale change between the first region and the second region can be the target backlight compensation increment; then, the sum of the target backlight compensation increment and the initial backlight data is used as the target backlight data.

[0176] Among them, when the gray-scale data corresponding to the second region is greater than the gray-scale data corresponding to the first region, the target backlight compensation increment determined by the display chip 43 is a positive number. In this way, the target backlight data determined according to the sum of the target backlight compensation coefficient and the initial backlight data will be greater than the initial backlight data. When driving the backlight brightness of the backlight partition corresponding to the second region with the target backlight data, the actual backlight brightness of this part of the backlight partition will be greater than the original backlight brightness, thereby making the overall brightness of the second region reach the ideal brightness.

[0177] When the gray-scale data corresponding to the second region is less than the gray-scale data corresponding to the first region, the target backlight compensation increment determined by the display chip 43 is a negative number. In this way, the target backlight data determined according to the sum of the target backlight compensation coefficient and the initial backlight data will be less than the initial backlight data. When driving the backlight brightness of the backlight partition corresponding to the second region with the target backlight data, the actual backlight brightness of this part of the backlight partition will be less than the original backlight brightness, thereby making the overall brightness of the second region reach the ideal brightness.

[0178] For example, assume that the determined target backlight compensation increment is 28 and the initial backlight data is 192. Then the target backlight data is: 192 + 28 = 220. Assume that the determined target backlight compensation increment is -31 and the initial backlight data is 63. Then the target backlight data is: 63 + (-31) = 32.

[0179] Through the above method, backlight compensation for the second region can be achieved, effectively improving the problem of uneven gray-scale transition in the second region caused by the gray-scale change between the second region and the first region, thereby improving the overall picture display effect.

[0180] Step S703: Control the backlight brightness of the backlight partition corresponding to the second region according to the target backlight data.

[0181] In a specific implementation, after determining the target backlight data corresponding to the second region through step S702, the display chip 43 will use the target backlight data to control the backlight brightness of the backlight partition corresponding to the second region, so that the actual overall brightness of the second region approaches the theoretical brightness, effectively improving the display effect.

[0182] Figure 9 Fig. shows a schematic diagram of image display of a display device provided by an embodiment of the present invention. As Figure 9 shown, there are two different gray levels when the display panel 41 performs image display, which respectively correspond to two different fillings in the figure. Among them, in the image area corresponding to the 192 gray level, it includes area A1 and area B1. In the image area corresponding to the 63 gray level, it includes area C1 and area D1. During the actual display process, since the scanning order is from top to bottom, when switching from the 63 gray level to the 192 gray level, area A1, which is located at the switching boundary, will have a process of changing from dark to bright; and as the scanning drive continues, it will switch from the 192 gray level to the 63 gray level, and area C1 will also be located at the switching boundary and will have a process of changing from bright to dark.

[0183] See Figure 9 , since there will be a process of changing from dark to bright in area A1 of the display panel 41, the actual backlight brightness of the backlight partition corresponding to area A1 in the backlight panel 42 should be greater than the original backlight brightness, so that the overall brightness of area A1 is consistent with that of area B1. Therefore, the display chip 43 will perform display compensation on area A1 in the manner of the embodiment of the present invention, adjust the gray level corresponding to area A1 from 192 to 220, so that the backlight panel 42 controls the backlight brightness of area A1 according to the 220 gray level, achieving the purpose that the overall brightness of area A1 is consistent with that of area B1.

[0184] Since there will be a process of changing from bright to dark in area C1 of the display panel 41, the actual backlight brightness of the backlight partition corresponding to area C1 in the backlight panel 42 should be less than the original backlight brightness, so that the overall brightness of area C1 is consistent with that of area D1. Therefore, the display chip 43 will perform display compensation on area C1 in the manner of the embodiment of the present invention, adjust the gray level corresponding to area C1 from 63 to 32, so that the backlight panel 42 controls the backlight brightness of area C1 according to the 32 gray level, achieving the purpose that the overall brightness of area C1 is consistent with that of area D1.

[0185] Figure 10 Fig. shows a schematic diagram of the display timing of a display device provided by an embodiment of the present invention. As Figure 10As shown, in the grayscale change of the display panel 41, region D1 can normally display 63 grayscales, and region B1 can normally display 192 grayscales. Although region A1 will change from 63 grayscales to 192 grayscales, and region C1 will change from 192 grayscales to 63 grayscales, in the backlight change of the backlight panel 42, the backlight brightness of the backlight zone corresponding to region A1 will be adjusted from the backlight brightness corresponding to 192 grayscales to the backlight brightness corresponding to 220 grayscales. By increasing the backlight brightness of the backlight zone corresponding to this region, the problem of overly uneven grayscale on the display panel 41 side is compensated. Also, the backlight brightness of the backlight zone corresponding to region C1 will be adjusted from the backlight brightness corresponding to 63 grayscales to the backlight brightness corresponding to 32 grayscales. By decreasing the backlight brightness of the backlight zone corresponding to this region, the problem of overly uneven grayscale on the display panel 41 side is compensated.

[0186] Through the above processing method, in the overall display of the display device 40, a relatively ideal grayscale brightness can be presented, that is, region A1 can also normally display the brightness corresponding to 192 grayscales, and region C1 can normally display the brightness corresponding to 63 grayscales, achieving the purpose of improving the overall image display effect.

[0187] In the display compensation method provided by the embodiments of the present invention, by adopting the method of compensating the backlight data of the backlight zones corresponding to the grayscale change regions in the image frame to be displayed, the problem that the compensation effect in the conventional Line-OD technology is limited by the grayscale range of the display panel is avoided. And because the setting accuracy of the backlight zones is relatively high, compared with the low-precision zone compensation method of the conventional Line-OD technology, by compensating the backlight brightness of some backlight zones, more accurate grayscale compensation can be achieved, reaching the purpose of overall improving the image quality and optimizing the display performance.

[0188] Based on the same concept, the embodiments of the present invention also provide a display chip. Since this display chip is the chip in the display compensation method provided by the embodiments of the present invention, and the principle of solving problems by this display chip is similar to that of the display compensation method, the implementation of this display chip can refer to the implementation of the display compensation method, and the repeated parts will not be elaborated.

[0189] Figure 11 Shows a schematic structural diagram of a display chip. As Figure 11 shown, the display chip 43 may include:

[0190] A region determination module 431, configured to determine a first region and a second region in the image frame to be displayed, where the first region and the second region are adjacent, and the driving time of the first region is earlier than that of the second region;

[0191] The backlight compensation module 432 is configured to determine a target backlight compensation value based on the grayscale data corresponding to the first region and the second region respectively, and compensate the initial backlight data corresponding to the second region according to the target backlight compensation value to obtain the target backlight data;

[0192] The backlight control module 433 is configured to control the backlight brightness of the backlight zone corresponding to the second region according to the target backlight data.

[0193] In some embodiments, the grayscale data corresponding to the first region is different from the grayscale data corresponding to the second region;

[0194] Specifically, the backlight compensation module 432 is configured to:

[0195] Determine the grayscale change amount between the grayscale data corresponding to the first region and the grayscale data corresponding to the second region;

[0196] Determine the target backlight compensation value according to the first correspondence relationship and the grayscale change amount, where the first correspondence relationship is used to represent the relationship between the grayscale change amount and the backlight compensation value.

[0197] In some embodiments, specifically, the backlight compensation module 432 is configured to:

[0198] Based on the grayscale change amount, determine the backlight compensation value corresponding to the grayscale change amount in the first correspondence relationship, and use the determined backlight compensation value as the target backlight compensation value.

[0199] In some embodiments, the grayscale data corresponding to the first region is different from the grayscale data corresponding to the second region;

[0200] Specifically, the backlight compensation module 432 is configured to:

[0201] Determine the target backlight compensation value based on the second correspondence relationship, the grayscale data corresponding to the first region, and the grayscale data corresponding to the second region, where the second correspondence relationship is used to represent the relationship between the initial grayscale data, the target grayscale data, and the backlight compensation value.

[0202] In some embodiments, the target backlight compensation value is a target backlight compensation coefficient;

[0203] Specifically, the backlight compensation module 432 is configured to:

[0204] Determine the target backlight data according to the product of the target backlight compensation coefficient and the initial backlight data.

[0205] In some embodiments, the target backlight compensation value is a target backlight compensation increment;

[0206] Specifically, the backlight compensation module 432 is configured to:

[0207] Determine the target backlight data according to the sum value of the target backlight compensation increment and the initial backlight data.

[0208] In some embodiments, the image frame to be displayed includes a plurality of grayscale data, and the plurality of grayscale data respectively correspond to a plurality of pixels in the pixel array;

[0209] The area determination module 431 is specifically configured to:

[0210] For the plurality of grayscale data corresponding to the same column of pixels, select a first grayscale data and a second grayscale data from the plurality of grayscale data, wherein a pixel corresponding to the first grayscale data is adjacent to a pixel corresponding to the second grayscale data;

[0211] Determine a first area in the image frame to be displayed according to the determined first grayscale data, and determine a second area in the image frame to be displayed according to the determined second grayscale data.

[0212] In some embodiments, the area determination module 431 is specifically configured to:

[0213] Determine the data difference between any two adjacent grayscale data in the plurality of grayscale data,

[0214] Compare the magnitude relationship between each data difference and a preset threshold in sequence according to a preset order, and determine a first grayscale data and a second grayscale data from the plurality of grayscale data according to the comparison result, wherein the preset order is determined according to the scanning driving order.

[0215] In some embodiments, the area determination module 431 is specifically configured to:

[0216] When it is recognized that the data difference is greater than the preset threshold, use this data difference as the target data difference;

[0217] Use the grayscale data corresponding to the plurality of data differences that are before the target data difference and less than or equal to the preset threshold in the preset order, and the first grayscale data among the two grayscale data used to determine the target data difference in the preset order, as the first grayscale data;

[0218] Use the grayscale data corresponding to the plurality of data differences that are after the target data difference and less than or equal to the preset threshold in the preset order, and the second grayscale data among the two grayscale data used to determine the target data difference in the preset order, as the second grayscale data.

[0219] In some embodiments, the area determination module 431 is specifically configured to:

[0220] Among the determined second grayscale data, select the third grayscale data, where the driving time of the pixels corresponding to the third grayscale data is earlier than the driving time of the pixels corresponding to other second grayscale data, and the other second grayscale data are the second grayscale data other than the third grayscale data among the determined second grayscale data;

[0221] Use the image area corresponding to the third grayscale data on the image frame to be displayed as the second area.

[0222] Based on the same concept, an embodiment of the present invention further provides a display device. The principle of solving problems by this display device is similar to that of the foregoing display chip. Therefore, the implementation of this display device can refer to the implementation of the foregoing display chip, and the repeated parts will not be elaborated.

[0223] As Figure 5 shown, the display device 40 may include a display panel 41, a backlight panel 42, and the display chip 43 provided in the embodiment of the present invention, where:

[0224] The display chip 43 is electrically connected to the display panel 41 and the backlight panel 42 respectively, and the display panel 41 and the backlight panel 42 are disposed opposite to each other.

[0225] In specific implementation, in the embodiment of the present invention, the display device 40 may be products such as a television and a computer. Other essential components of this display device 40 should be understood by those of ordinary skill in the art and will not be elaborated here, nor should they be regarded as a limitation to the present invention.

[0226] Although the preferred embodiments of the present invention have been described, those skilled in the art can make additional changes and modifications once they know the basic creative concept. Therefore, the appended claims are intended to be construed to include the preferred embodiments as well as all changes and modifications falling within the scope of the present invention.

[0227] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention is also intended to include these modifications and variations.

Claims

1. A display compensation method, characterized in that: include: Determine a first area and a second area in an image frame to be displayed, wherein the first area and the second area are adjacent, and a driving time of the first area is earlier than a driving time of the second area; Determine a target backlight compensation value based on the grayscale data corresponding to the first area and the second area respectively, and compensate the initial backlight data corresponding to the second area according to the target backlight compensation value to obtain target backlight data; The backlight brightness of the backlight subarea corresponding to the second area is controlled according to the target backlight data.

2. The method according to claim 1, characterized in that The grayscale data corresponding to the first area is different from the grayscale data corresponding to the second area; The determining a target backlight compensation value based on the grayscale data corresponding to the first area and the second area respectively includes: Determine a grayscale change between grayscale data corresponding to the first region and grayscale data corresponding to the second region; The target backlight compensation value is determined according to a first corresponding relationship and the grayscale variation, wherein the first corresponding relationship is used to characterize the relationship between the grayscale variation and the backlight compensation value.

3. The method according to claim 2, characterized in that The step of determining the target backlight compensation value according to the first corresponding relationship and the grayscale variation includes: Based on the grayscale variation, a backlight compensation value corresponding to the grayscale variation is determined in the first corresponding relationship, and the determined backlight compensation value is used as the target backlight compensation value.

4. The method according to claim 1, characterized in that The grayscale data corresponding to the first area is different from the grayscale data corresponding to the second area; The determining a target backlight compensation value based on the grayscale data corresponding to the first area and the second area respectively includes: The target backlight compensation value is determined based on a second corresponding relationship, grayscale data corresponding to the first area, and grayscale data corresponding to the second area, wherein the second corresponding relationship is used to characterize the relationship between initial grayscale data, target grayscale data, and backlight compensation value.

5. The method according to claim 1, characterized in that The target backlight compensation value is a target backlight compensation coefficient; The compensating the initial backlight data corresponding to the second area according to the target backlight compensation value to obtain the target backlight data includes: The target backlight data is determined according to the product of the target backlight compensation coefficient and the initial backlight data.

6. The method according to claim 1, characterized in that The target backlight compensation value is a target backlight compensation increment; The compensating the initial backlight data corresponding to the second area according to the target backlight compensation value to obtain the target backlight data includes: The target backlight data is determined according to the sum of the target backlight compensation increment and the initial backlight data.

7. The method according to any one of claims 1 to 6, characterized in that The image frame to be displayed includes a plurality of grayscale data, and the plurality of grayscale data respectively correspond to a plurality of pixels in the pixel array; The determining of the first area and the second area in the image frame to be displayed includes: For a plurality of grayscale data corresponding to the same column of pixels, selecting first grayscale data and second grayscale data from the plurality of grayscale data, wherein a pixel corresponding to the first grayscale data is adjacent to a pixel corresponding to the second grayscale data; The first region is determined in the image frame to be displayed according to the determined first grayscale data, and the second region is determined in the image frame to be displayed according to the determined second grayscale data.

8. The method according to claim 7, characterized in that The selecting, for a plurality of grayscale data corresponding to the same column of pixels, first grayscale data and second grayscale data from the plurality of grayscale data comprises: Determine a data difference between any two adjacent grayscale data among the plurality of grayscale data; According to a preset order, the magnitude relationship between each data difference and a preset threshold is compared in sequence, and according to the comparison result, the first grayscale data and the second grayscale data are determined in the plurality of grayscale data, wherein the preset order is determined according to a scan drive order.

9. The method according to claim 8, characterized in that The step of determining the first grayscale data and the second grayscale data from the plurality of grayscale data according to the comparison result includes: When it is identified that the data difference is greater than the preset threshold, the data difference is used as the target data difference; The grayscale data corresponding to the plurality of data difference values ​​that are located before the target data difference value in the preset order and are less than or equal to the preset threshold value, and the first grayscale data of the two grayscale data used to determine the target data difference value in the preset order are used as the first grayscale data; Grayscale data corresponding to multiple data difference values ​​that are located after the target data difference value in the preset order and are less than or equal to the preset threshold, and the latter grayscale data of two grayscale data used to determine the target data difference value in the preset order, are used as the second grayscale data.

10. The method according to claim 7, characterized in that The step of determining the second area in the image frame to be displayed according to the determined second grayscale data includes: Selecting third grayscale data from the determined second grayscale data, wherein a driving moment of a pixel corresponding to the third grayscale data is earlier than a driving moment of a pixel corresponding to other second grayscale data, and the other second grayscale data is second grayscale data other than the third grayscale data from the determined second grayscale data; The image area corresponding to the third grayscale data on the image frame to be displayed is used as the second area.

11. A display chip, characterized in that: include: A region determination module, configured to determine a first region and a second region in an image frame to be displayed, wherein the first region and the second region are adjacent to each other, and a driving time of the first region is earlier than a driving time of the second region; a backlight compensation module, configured to determine a target backlight compensation value based on the grayscale data corresponding to the first area and the second area, and to compensate the initial backlight data corresponding to the second area according to the target backlight compensation value to obtain target backlight data; A backlight control module is used to control the backlight brightness of the backlight subarea corresponding to the second area according to the target backlight data.

12. A display device, characterized in that: The device comprises a display panel, a backlight panel and a display chip as claimed in claim 11, wherein: The display chip is electrically connected to the display panel and the backlight panel respectively, and the display panel and the backlight panel are arranged opposite to each other.

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