CN115985216A

CN115985216A - Luminance compensation method and luminance compensation device

Info

Publication number: CN115985216A
Application number: CN202211663114.5A
Authority: CN
Inventors: 徐玲
Original assignee: TCL Huaxing Photoelectric Technology Co Ltd
Current assignee: TCL Huaxing Photoelectric Technology Co Ltd
Priority date: 2022-12-23
Filing date: 2022-12-23
Publication date: 2023-04-18

Abstract

The application provides a brightness compensation method and a brightness compensation device, wherein the brightness compensation method comprises the following steps: acquiring a plurality of binding point gray scales; dividing the first display area into a plurality of second display areas based on the number of the binding gray scales, and obtaining a display gray scale corresponding to each second display area based on the binding gray scales; acquiring an actual brightness value and a standard brightness value of each second display area under the corresponding display gray scale, and obtaining a brightness compensation value of each second display area based on the actual brightness value and the standard brightness value; and performing brightness compensation on each second display area according to the brightness compensation value. The brightness compensation method provided by the application can improve the compensation effect of the Demura method on the non-binding point gray scale and improve the display image quality of a panel product.

Description

Luminance compensation method and luminance compensation device

Technical Field

The present disclosure relates to the field of display technologies, and in particular, to a brightness compensation method and a brightness compensation apparatus.

Background

Currently, a gray scale compensation (Demura) method is adopted for compensating for uneven brightness of a display picture. The method divides the display area of the display panel into a plurality of areas, and adjusts the picture brightness of the whole liquid crystal display panel uniformly by taking the brightness of the central area as a reference.

In order to save the production time of the panel, the Demura method usually only selects one gray scale from the low gray scale, the middle gray scale and the high gray scale as a binding point gray scale for processing, wherein the compensation value of the binding point gray scale is obtained by accurately calculating the picture of the binding point gray scale, the compensation value of the non-binding point gray scale is usually calculated based on the binding point gray scale and by adopting a linear interpolation mode, and a Demura curve is established.

However, the compensation value of the non-binding gray scale is determined only by linear interpolation to compensate the display panel, so that the non-binding gray scale is often over-compensated or under-compensated. The main reason for this is that the Mura (uneven brightness) of different display areas varies with the gray scale.

Disclosure of Invention

The application provides a brightness compensation method and a brightness compensation device, which can improve the compensation effect of a Demura method on unbound gray scales and improve the display image quality of a panel product.

In a first aspect, the present application provides a brightness compensation method for performing brightness compensation on a first display area of a display panel, including the following steps:

acquiring a plurality of binding point gray scales;

dividing the first display area into a plurality of second display areas based on the number of the binding point gray scales, and obtaining a display gray scale corresponding to each second display area;

acquiring an actual brightness value and a standard brightness value of each second display area under a corresponding display gray scale, and obtaining a brightness compensation value of each second display area based on the actual brightness value and the standard brightness value; and

and performing brightness compensation on the first display area according to the brightness compensation value.

In the brightness compensation method provided by the present application, the dividing the first display area into a plurality of second display areas based on the number of the binding gray scales, and obtaining a display gray scale corresponding to each of the second display areas includes:

acquiring an endpoint gray scale;

determining a display gray scale corresponding to the second display area based on the endpoint gray scale and the binding gray scale adjacent to the endpoint gray scale; and

and determining a display gray scale corresponding to the second display area based on two adjacent binding gray scales.

In the brightness compensation method provided by the present application, the step of determining the display gray scale corresponding to the second display region based on the endpoint gray scale and the binding gray scale adjacent to the endpoint gray scale includes:

acquiring median values between the end point gray scale and the binding point gray scale adjacent to the end point gray scale;

determining the median value as a display gray scale corresponding to the second display area;

and/or, the step of determining the display gray scale corresponding to the second display area based on two adjacent binding gray scales includes:

acquiring a median value between two adjacent binding point gray scales;

and determining the median value as the display gray scale corresponding to the second display area.

In the brightness compensation method provided by the present application, the step of determining the display gray scale corresponding to the second display region based on the endpoint gray scale and the binding point gray scale adjacent to the endpoint gray scale comprises:

when switching is carried out on the basis of each gray scale between the endpoint gray scale and the binding point gray scale adjacent to the endpoint gray scale, whether a defect position on the display panel is transferred or not is judged, and a display gray scale corresponding to the second display area is determined;

and/or the step of determining the display gray scale corresponding to the corresponding second display area based on two adjacent binding gray scales comprises the following steps:

when each gray scale between two adjacent binding point gray scales is switched, whether the defect position on the display panel is transferred or not is determined, and the display gray scale corresponding to the second display area is determined.

In the brightness compensation method provided by the present application, the step of obtaining an actual brightness value of each second display area under a corresponding display gray scale includes:

acquiring an initial actual brightness value of each second display area under the corresponding display gray scale;

and obtaining a unit area brightness value of the corresponding second display area based on each initial actual brightness value, and taking the unit area brightness value as an actual brightness value of the corresponding second display area under the corresponding display gray scale.

In the brightness compensation method provided by the present application, the step of obtaining a standard brightness value of each second display area under a corresponding display gray scale includes:

acquiring a standard brightness value of a central area of the display panel under a full gray scale;

and obtaining the standard brightness value of each second display area under the corresponding display gray scale according to the standard brightness value of the central area of the display panel under the full gray scale and the display gray scale.

In the brightness compensation method provided by the present application, the step of obtaining the brightness compensation value of each second display area based on the actual brightness value and the standard brightness value includes:

and performing difference processing on the actual brightness value and the standard brightness value to obtain a brightness compensation value of each second display area.

In the brightness compensation method provided by the present application, the step of performing brightness compensation on the first display area according to the brightness compensation value includes

And correcting the brightness compensation curve of the first display area based on the brightness compensation value, and compensating the first display area according to the corrected brightness compensation curve.

In the brightness compensation method provided by the application, the plurality of binding gray scales comprise a first binding gray scale, a second binding gray scale and a third binding gray scale;

the first binding point gray scale is between 20 gray scales and 30 gray scales, the second binding point gray scale is between 55 gray scales and 65 gray scales, and the third binding point gray scale is between 125 gray scales and 135 gray scales.

The application provides a brightness compensation method, divide into a plurality of second display areas with first display area based on the tie point gray scale, and obtain the display gray scale that every second display area corresponds based on the tie point gray scale, can confirm the brightness compensation value of display gray scale at corresponding second display area, carry out the correction with the Demura curve of first display area based on the brightness compensation value of display gray scale at corresponding second display area, with the Demura curve slope of first display area of luminance compensation value correction that each display gray scale corresponds, and then improve the compensation effect of Demura method to the non-tie point gray scale of first display area, promote the display image quality of panel product.

In a second aspect, the present application also provides a brightness compensation apparatus, including:

an acquisition module for acquiring a plurality of binding point gray scales;

the dividing module is used for dividing the first display area into a plurality of second display areas based on the number of the binding point gray scales and obtaining a display gray scale corresponding to each second display area;

the calculation module is used for acquiring an actual brightness value and a standard brightness value of each second display area under a corresponding display gray scale, and obtaining a brightness compensation value of each second display area based on the actual brightness value and the standard brightness value; and

and the compensation module is used for performing brightness compensation on the first display area according to the brightness compensation value.

The application provides a brightness compensation device, divide the first display area into a plurality of second display areas through dividing the module based on the tie point grey scale, and obtain the display grey scale that every second display area corresponds based on dividing the module, thereby calculation module can confirm the brightness compensation value of display grey scale at corresponding second display area, carry out the correction to the Demura curve based on the brightness compensation value of display grey scale at corresponding second display area, with the Demura curve slope of first display area of brightness compensation value correction that each display grey scale corresponds, and then can improve the compensation effect of Demura method to the non-tie point grey scale of first display area, promote the display image quality of panel product.

Drawings

Fig. 1 is a first flowchart of a brightness compensation method according to an embodiment of the present disclosure;

FIG. 2 is a first flowchart illustrating step S20 of FIG. 1;

FIG. 3 is a schematic view of the detailed process of step S22 in FIG. 2;

FIG. 4 is a schematic diagram of the detailed process of step S23 in FIG. 2;

FIG. 5 is a schematic diagram illustrating a mixed gray scale pattern in a first display region;

fig. 6 is a schematic flow chart of the specific process of acquiring the actual brightness value of each second display region in the corresponding display gray scale in step S30 in fig. 1;

fig. 7 is a schematic view of a specific flow chart of the step S30 in fig. 1 for obtaining the standard luminance value of each second display region under the corresponding display gray scale;

FIG. 8 is a second flowchart of step S20 in FIG. 1;

fig. 9 is a third specific flowchart of step S20 in fig. 1.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. In the drawings, main elements related to the inventive concept are clearly and concisely illustrated, the shapes of layers or regions may be exaggerated, and secondary elements may be omitted to avoid unclear presentation. Like reference numerals refer to like elements throughout the drawings throughout the specification. However, the present invention is not limited to the following examples. The features, elements, or structures referred to in the various embodiments or in the corresponding method descriptions may be applied to other embodiments, individually or in combination. It should be apparent that the described embodiments are only a few embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Furthermore, the terms "first," "second," and the like in the description and in the claims of the present application are used for distinguishing between different objects and not for describing a particular order. The terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions.

The brightness unevenness of the display panel expressed under the gray scale picture is called Mura, and the conventional Mura correction is to determine the brightness value required to be compensated in the non-central area of the display panel by acquiring the original Mura state of the display panel under different gray scales and taking the brightness of the central area of the display panel as a reference. The brightness of the area with low brightness of the display panel is increased, the brightness of the area with high brightness of the display panel is reduced, and the brightness of the whole display area of the display panel is adjusted to be uniform.

For this reason, the related patent proposes a Demura method to improve Mura of the display panel so that the brightness of the display panel is uniform. The principle of Demura algorithm is to calculate a brightness compensation value according to a Gamma (Gamma) value and a target brightness of a gray scale to be measured. In order to save the production time of the display panel, the Demura algorithm generally selects one gray scale from the low, medium and high gray scales as a binding point gray scale for processing, namely, the brightness compensation value of the binding point gray scale is obtained by accurately calculating the display picture corresponding to the binding point gray scale, and the brightness compensation value of the non-binding point gray scale except the binding point gray scale is calculated and determined by adopting a linear interpolation mode, a Demura curve is established, and then the brightness compensation is carried out on the display panel according to the Demura curve. However, the Mura of different areas of the display panel has different trend along with the gray scale, and the brightness compensation value of the non-binding gray scale is determined only by a linear interpolation method and then compensated, so that the display panel still has under-compensation or over-compensation when displaying the picture of the non-binding gray scale, and the display panel still has the condition of different brightness.

Based on the problem that the Demura method has in the compensation of the display panel, the application provides a brightness compensation method, carries out brightness compensation to the subregion of display panel, can correct the brightness compensation value that the non-tie point gray scale of different regions of display panel corresponds to revise the slope of Demura curve, can improve the compensation effect of Demura method to the non-tie point gray scale, promotes the display image quality of panel product.

Referring to fig. 1, fig. 1 is a schematic flow chart of a luminance compensation method according to an embodiment of the present disclosure. As shown in fig. 1, the brightness compensation method at least includes the following steps:

step S10, a plurality of binding point gray scales are obtained. In the step, a plurality of binding point gray scale fingers are obtained, and in the full gray scale range, a plurality of gray scales are obtained as binding point gray scales, so that the brightness compensation value corresponding to the binding point gray scale is determined through a Demura algorithm.

In some embodiments provided by the present application, three tie gray levels, namely, a first tie gray level, a second tie gray level, and a third tie gray level, can be obtained from the full gray level range. Specifically, when the full gray scale range is 0 gray scale to 255 gray scale, the first binding gray scale is between 20 gray scale and 30 gray scale, the second binding gray scale is between 55 gray scale and 65 gray scale, and the third binding gray scale is between 125 gray scale and 135 gray scale.

That is, in the present embodiment, the three binding point grayscales obtained include a low grayscale, a middle grayscale, and a high grayscale. It should be noted that the low gray level, the middle gray level and the high gray level are relative to the three gray levels in the full gray level, and generally, the low gray level may be set to about 10% of the full gray level, the middle gray level may be set to about 20% to 45% of the full gray level, and the high gray level may be set to about 50% of the full gray level. In some embodiments provided herein, the first binding gray level may be a 25 gray level, the second binding gray level may be a 60 gray level, and the third binding gray level may be a 128 gray level. It will be understood by those skilled in the art that the three gray levels can be varied and can be selected according to the overall condition of the display panel.

By selecting one gray scale from the low gray scale, the middle gray scale and the high gray scale as the binding point gray scale, the time for calculating the brightness compensation value by shooting binding point gray scale pictures one by one due to setting of excessive binding point gray scales can be saved, and the production time of the display panel is further saved.

And step S20, dividing the first display area into a plurality of second display areas based on the number of the binding gray scales, and obtaining the display gray scale corresponding to each second display area based on the binding gray scales.

Compared with the method that the first display area of the display panel is subjected to full-gray-scale display one by one, the display gray scale displayed in the first display area is determined based on the obtained binding gray scale, and the workload of performing gray-scale detection on the first display area of the display panel one by one can be greatly reduced.

It should be noted that in this step, the first display area of the display panel may be a non-central area of the display panel, or may be a central area of the display panel. The areas of the plurality of second display regions may be the same, and the areas of the plurality of second display regions may be different.

In some embodiments provided in the present application, please refer to fig. 2, fig. 2 is a schematic flowchart of a specific process of step 20 in fig. 1, and as shown in fig. 2, step 20 includes:

step S21, acquiring an endpoint gray scale;

the end gray levels refer to the highest gray level and the lowest gray level within the full gray level range, and specifically, the full gray level range is 0 gray level to 255 gray levels, and the end gray levels are 0 gray level and 255 gray levels.

Step S22, determining a display gray scale corresponding to the corresponding second display area based on the endpoint gray scale and the binding gray scale adjacent to the endpoint gray scale;

that is, in this step, a display gray scale is determined between the end point gray scale and the binding point gray scale adjacent to the end point gray scale; specifically, a display gray scale is determined between the binding gray scales adjacent to the highest gray scale and the lowest gray scale, and a display gray scale is determined between the binding gray scales adjacent to the lowest gray scale and the highest gray scale.

Taking the binding gray scales with 3 and full gray scales from 0 gray scale to 255 gray scale as an example, the lowest gray scale is 0 gray scale, the highest gray scale is 255 gray scale, the first binding gray scale is 25 gray scale, the second binding gray scale is 60 gray scale, and the third binding gray scale is 128 gray scale; the display gray scale of the first display area is determined between the gray scale of 0 and the gray scale of 25, the display gray scale of the first display area is determined between the gray scale of 128 and the gray scale of 255, and two second display areas in the first display area are displayed corresponding to the two display gray scales one by one.

Specifically, in some specific embodiments provided in the present application, please refer to fig. 3, fig. 3 is a specific flowchart illustrating step S22 in fig. 2, and as shown in fig. 3, step S22 includes:

step S221, obtaining a median value between the endpoint gray scale and the binding point gray scale adjacent to the endpoint gray scale;

in step S222, a median value between the end point gray scale and the binding point gray scale adjacent to the end point gray scale is determined as a display gray scale corresponding to the corresponding second display region.

In this embodiment, a specific step of determining a display gray scale between an endpoint gray scale and a binding point gray scale is provided, and a gray scale median value between the endpoint gray scale and an adjacent binding point gray scale is determined as the display gray scale of the first display area.

And S23, determining the display gray scale corresponding to the corresponding second display area based on the two adjacent binding gray scales.

That is, in this step, a display gray level is determined between the binding gray levels and the binding gray levels, and specifically, a display gray level is determined between adjacent binding gray levels.

Taking the binding gray scales with 3 and full gray scales from 0 gray scale to 255 gray scale as an example, the lowest gray scale is 0 gray scale, the highest gray scale is 255 gray scale, the first binding gray scale is 25 gray scale, the second binding gray scale is 60 gray scale, and the third binding gray scale is 128 gray scale; the display gray scale of the first display region is determined between 25 gray scales and 60 gray scales, respectively, the display gray scale of the first display region is determined between 60 gray scales and 128 gray scales, and two second display regions in the first display region are displayed in one-to-one correspondence with the two display gray scales.

As can be seen from the combination of steps S21, S22, and S23, in one aspect, the brightness compensation method determines the number of the display gray scales based on the number of the tie point gray scales, and displays the plurality of display gray scales and the plurality of second display regions in a one-to-one correspondence manner, so as to determine the number of the second display regions in the first display region, and in another aspect, the display gray scale corresponding to each second display region is determined based on the tie point gray scale.

Specifically, in some specific embodiments provided in the present application, please refer to fig. 4, fig. 4 is a specific flowchart illustrating step S23 in fig. 2, and as shown in fig. 4, step S23 specifically includes:

s231, acquiring a median value between two adjacent binding point gray scales;

step S232, determining a median value between two adjacent binding point grayscales as a display grayscale corresponding to the corresponding second display region.

In the embodiment, a specific step of determining a display gray scale between an endpoint gray scale and a binding point gray scale is provided, and a gray scale median value between two adjacent binding point gray scales is determined as the display gray scale of the first display area.

In combination with step S221, step S222, step S231, and step S232, the 3 binding gray levels can determine the display gray levels with different gray level values, so that a first display area can be divided into 4 second display areas, and the 4 display gray levels with different gray level values and the 4 second display areas are displayed in the same frame of display screen in a one-to-one correspondence manner. Therefore, in the same frame of display picture, the mixed gray scale pattern is manufactured in the first display area. Specifically, referring to fig. 5, fig. 5 shows a mixed gray scale pattern in the first display area. As shown in FIG. 5, the first display region 01 includes 4 equally divided second display regions 011, one of which has a gray scale of 16, one of which has a gray scale of 43, and one of which has a gray scale of 011, wherein one of the second display regions 011 has a gray scale of 94, and one of the second display regions 011 has a gray scale of 150.

Step S30, acquiring an actual brightness value and a standard brightness value of each second display area under the corresponding display gray scale, and obtaining a brightness compensation value of each second display area based on the actual brightness value and the standard brightness value;

and acquiring the actual brightness value of each second display area under the corresponding display gray scale by the color analyzer CA-410. Specifically, when the first display area is in the central area of the display panel, the standard brightness value of the display gray scale is obtained by determining the actual brightness value of the binding gray scale in the central area through linear interpolation, and the actual brightness value of the binding gray scale in the central area is measured by the color analyzer CA-410. And when the first display area is in a non-central area of the display panel, the standard brightness value of the display gray scale is obtained by acquiring an actual brightness value of the central area of the display panel when the picture is displayed based on the display gray scale. Wherein, in order to optimize the display effect of the central region of the display panel, the gamma value of the central region of the display panel is set to 2.2.

In the step of obtaining the brightness compensation value of each second display region based on the actual brightness value and the standard brightness value, to avoid detection errors, the actual brightness value of each second display region under the corresponding display gray scale may be obtained multiple times, and the average brightness value obtained multiple times is used as the actual brightness value.

The actual brightness value and the standard brightness value of each display gray scale can be subjected to difference processing to obtain a brightness compensation value of each second display area.

In some embodiments provided in the present application, please refer to fig. 6, wherein fig. 6 is a schematic flowchart illustrating a specific process of acquiring an actual luminance value of each second display region in the corresponding display gray scale in step S30 in fig. 1. As shown in fig. 6, this step includes:

step S311, acquiring an initial brightness value of each second display area under the corresponding display gray scale;

specifically, each second display area of the display panel displays a corresponding display gray scale picture, and the color analyzer is used for measuring and acquiring the initial brightness value of the display gray scale corresponding to each second display area.

Step S312, obtaining a unit area brightness value of the corresponding second display area based on each initial brightness value, and taking the unit area brightness value as an actual brightness value of the corresponding second display area under the corresponding display gray scale;

it should be noted that, since the initial luminance value of the second display region is obtained in step 311, and the second display region further includes a plurality of sub-pixels therein, the initial luminance value is obtained by integrating luminance of the plurality of sub-pixels based on the display gray scale. In order to reduce the detection error, in this embodiment, the unit area brightness value of the second display region is used as the actual brightness value of the corresponding display gray scale, that is, the actual brightness value of the second display region at the corresponding display gray scale is the average brightness value of the second display region at the corresponding display gray scale.

In some embodiments provided in the present application, please refer to fig. 7, and fig. 7 is a flowchart illustrating a specific process of acquiring the standard luminance value of each second display region in the corresponding display gray scale in step 30 in fig. 1. As shown in fig. 7, this step includes:

step S321, acquiring a standard brightness value of a central area of the display panel under a full gray scale;

specifically, a full gray scale range is determined, for example, the full gray scale range is determined to be 0 gray scale to 255 gray scale, so that a central area of the display panel sequentially displays 0 gray scale images to 255 gray scale images, an actual brightness value of each gray scale displayed in the central area of the display panel is measured and obtained through a color analyzer, and a standard brightness value under the full gray scale is calculated based on the actual brightness value of each gray scale. Specifically, the average brightness value of each gray scale in the central region of the display panel can be used as the standard brightness value of each gray scale, so as to obtain the standard brightness value of the full gray scale.

Step S322, obtaining a standard brightness value of each second display region in the corresponding display gray scale according to the standard brightness value of the central region of the display panel in the full gray scale and the display gray scale.

Specifically, a standard brightness lookup table may be established based on standard brightness values of the central region of the display panel at the full gray scale, where the standard brightness lookup table includes the full gray scale and standard brightness values corresponding to the full gray scale. And then, based on the display gray scale and the standard brightness lookup table, obtaining a standard brightness value corresponding to the specific display gray scale, thereby obtaining a standard brightness value of each second display area under the corresponding display gray scale.

And S40, performing brightness compensation on the first display area according to the brightness compensation value. And obtaining an accurate brightness compensation value of the non-binding point gray scale of the second display area corresponding to the display gray scale based on the actual brightness value of the display gray scale in the corresponding second display area and the standard brightness value of the display gray scale.

Specifically, the Demura curve corresponding to the first display area is corrected based on the brightness compensation value in step S40, so as to correct the slope of the Demura curve corresponding to the first display area, thereby improving the compensation effect of the first display area and improving the display image quality of the panel product.

In summary, the brightness compensation method provided by the present application can determine the brightness compensation value of the display gray scale in the corresponding second display region, so as to improve the compensation effect of the Demura method on the non-binding gray scale in the first display region, and improve the display quality of the display panel.

In some embodiments provided in the present application, please refer to fig. 8, and fig. 8 is a second specific flowchart of step S20 in fig. 1. As shown in fig. 8, the difference between the brightness compensation method of the present embodiment and the foregoing embodiments is that, in step S22, determining the display gray scale corresponding to the second display region based on the end point gray scale and the binding point gray scale adjacent to the end point gray scale further includes determining the display gray scale corresponding to the second display region based on whether the defect position on the display panel is shifted when switching between the end point gray scale and the binding point gray scale adjacent to the end point gray scale.

Wherein, the defect position on the display panel refers to the position of Mura on the display panel. It should be noted that, due to the characteristics of the display panel, the Mura configuration may jump when switched between certain gray scales, that is, the position of the Mura on the display panel may shift based on the gray scale switching of the display frame, and the jump when the Mura configuration is switched between certain gray scales means that the brightness of the display frame corresponding to the gray scales needs to be compensated accurately. Therefore, in the present embodiment, the gray level between the end point gray level and the binding point gray level, which causes the defect position on the display panel to be shifted, is used as the display gray level.

In some embodiments provided by the present application, please refer to fig. 9, and fig. 9 is a third specific flowchart of step S20 in fig. 1. As shown in fig. 9, the brightness compensation method of the present embodiment is different from the foregoing embodiments in that, in step S23, determining the display gray scale corresponding to the corresponding second display region based on two adjacent binding gray scales further includes determining the display gray scale corresponding to the corresponding second display region based on whether a defect position on the display panel is shifted when switching is performed between two adjacent binding gray scales.

Similarly to the foregoing embodiment, in the present embodiment, the gray scale between adjacent tie point gray scales, which causes the defect position on the display panel to shift, is used as the display gray scale to more accurately compensate the brightness of the display frame corresponding to the display gray scales, so that the display uniformity of the display panel is improved, the setting of excessive tie point gray scales is avoided, and the productivity of the display panel is further improved.

An embodiment of the present application further provides a luminance compensation apparatus, including:

an acquisition module for acquiring a plurality of binding point gray scales;

the calculation module is used for acquiring an actual brightness value and a standard brightness value of each second display area under a corresponding display gray scale, and obtaining a brightness compensation value of each second display area based on the actual brightness value and the standard brightness value; and the number of the first and second groups,

The application provides a brightness compensation device, divide the first display area into a plurality of second display areas through dividing the module based on the tie point gray scale, and obtain the display gray scale that every second display area corresponds based on dividing the module, thereby calculation module can confirm the brightness compensation value of display gray scale at corresponding second display area, rectify the Demura curve based on the brightness compensation value of display gray scale at corresponding second display area, with the Demura curve slope of revise first display area based on the brightness compensation value that each display gray scale corresponds, and then can improve the compensation effect of Demura method to the non-tie point gray scale of first display area, promote the display image quality of panel product.

The above embodiments are merely examples, and not intended to limit the scope of the present application, and all modifications, equivalents, and flow charts using the contents of the specification and drawings of the present application, or those directly or indirectly applied to other related arts, are included in the scope of the present application.

Claims

1. A brightness compensation method for compensating brightness of a first display region of a display panel includes the following steps:

acquiring a plurality of binding point gray scales;

dividing the first display area into a plurality of second display areas based on the number of the binding gray scales, and obtaining a display gray scale corresponding to each second display area based on the binding gray scales;

2. The luminance compensation method according to claim 1, wherein the dividing the first display region into a plurality of second display regions based on the number of the tie gray levels, and the obtaining the display gray level corresponding to each of the second display regions based on the tie gray levels comprises:

acquiring an endpoint gray scale;

determining a display gray scale corresponding to the second display area based on the endpoint gray scale and the binding point gray scale adjacent to the endpoint gray scale; and

3. The luminance compensation method as claimed in claim 2, wherein the step of determining the display gray scale corresponding to the second display region based on the end point gray scale and the binding gray scale adjacent to the end point gray scale comprises:

acquiring a median value between the endpoint gray scale and the binding point gray scale adjacent to the endpoint gray scale;

acquiring a median value between two adjacent binding point gray scales;

4. The luminance compensation method as claimed in claim 2, wherein the step of determining the display gray scale corresponding to the second display region based on the end point gray scale and the binding gray scale adjacent to the end point gray scale comprises:

5. The luminance compensation method as claimed in claim 1, wherein the step of obtaining the actual luminance value of each of the second display regions at the corresponding display gray scale comprises:

6. The luminance compensation method as claimed in claim 1, wherein the step of obtaining a standard luminance value of each of the second display regions at the corresponding display gray scale comprises:

7. The luminance compensation method according to claim 1, wherein the step of obtaining the luminance compensation value of each of the second display regions based on the actual luminance value and the standard luminance value comprises:

8. The luminance compensation method according to claim 1, wherein the step of luminance-compensating the first display region according to the luminance compensation value comprises:

and correcting a brightness compensation curve of the first display area based on the brightness compensation value, and compensating the first display area according to the corrected brightness compensation curve.

9. The luminance compensation method as claimed in any one of claims 1 to 8, wherein the plurality of binding gray scales includes a first binding gray scale, a second binding gray scale and a third binding gray scale;

10. An illumination compensation apparatus, comprising:

an acquisition module for acquiring a plurality of binding point gray scales;