TWI728767B - Display module calibration method and display module calibration system - Google Patents

Abstract

A display module calibration system is provided in the present disclosure. The display module calibration system includes a display module detection device and a display module under test. The display module detection device provides a turn-on detection signal and a split-screen signal. The display module under test is electrically connected to the display module detection device, and receives the turn-on detection signal and the split-screen signal. When a non-uniform brightness occurs in the display module under test, the display module detection device provides a split-screen signal to the display module under test, divides the display module under test into a first split screen area and a second split screen, and obtain an average brightness difference information between the first split screen area and the second split screen area. The display module detection device adjusts a grayscale value of the first split screen area or the second split screen area of ​​the display module under test according to the average brightness difference information.

Description

Display module calibration method and display module calibration system

The invention relates to a display module calibration method and a display module calibration system, in particular to a display module calibration method and a display module calibration system which can save test time.

Display module manufacturers are prone to encounter the problem of abnormal testing process and unable to perform defect correction in the automated production process, especially the problem of uneven brightness (Mura). However, most calibration methods require a lot of calculation time and adjustment process.

Therefore, it is an important issue in the industry to provide a display module calibration system and a display module calibration module that can save test time.

The technical problem to be solved by the present invention is to provide a display module calibration method for the shortcomings of the prior art. The display module calibration method includes the following steps: provide a one-point light test signal to a display module to be tested to obtain a brightness uniformity information of the display device to be tested; judge according to the brightness uniformity information, when the display module to be tested is in a When the brightness is non-uniform, provide a split screen signal to the display module to be tested, divide the display module to be tested into a first split screen area and a second split screen area; obtain the first split screen area and the second split screen area A brightness average difference information between the screen areas; and adjusting a grayscale value of the first or second sub-screen area of the display module to be tested according to the average brightness difference information.

The invention also discloses a display module calibration system, which includes a display module detection device and a display module to be tested. The display module detection device provides a light detection signal and a split screen signal. The display module to be tested is electrically connected to the display module detection device, and receives the lighting detection signal and the split screen signal. When the display module to be tested is in a state of non-uniform brightness, the display module detection device provides a split screen signal to the display module to be tested, and divides the display module to be tested into a first split screen area and a second split screen Area, and obtain information about the average brightness difference between the first divided screen area and the second divided screen area. The display module detection device adjusts a grayscale value of the first or second sub-screen area of the display module to be tested according to the average brightness difference information.

One of the beneficial effects of the present invention is that the display module calibration system and display module calibration method provided by the present invention capture a part of the display module to be tested and calculate the brightness uniformity information to calculate the brightness uniformity of the display module to be tested. The brightness uniformity information of some areas is compensated to improve the brightness uniformity, and at the same time, it can also save the amount of calculation and test time. In addition, the display module calibration system and the display module calibration method provided by the present invention can also restore the originally unrepairable split-screen defect into a normal effect, effectively improving the execution rate of the calibration.

In order to further understand the features and technical content of the present invention, please refer to the following detailed description and drawings about the present invention. However, the drawings provided are only for reference and description, and are not used to limit the present invention.

The following is a specific embodiment to illustrate the implementation of the "display module calibration method and system" provided by the present invention. Those skilled in the art can understand the advantages and effects of the present invention from the content provided in this specification. The present invention can be implemented or applied through other different specific embodiments, and various details in this specification can also be based on different viewpoints and applications, and various modifications and changes can be made without departing from the concept of the present invention. In addition, the drawings of the present invention are merely schematic illustrations, and are not drawn according to actual dimensions, and are stated in advance. The following embodiments will further describe the related technical content of the present invention in detail, but the provided content is not intended to limit the protection scope of the present invention.

It should be understood that although terms such as "first", "second", and "third" may be used herein to describe various elements or signals, these elements or signals should not be limited by these terms. These terms are mainly used to distinguish one element from another, or one signal from another signal. In addition, the term "or" used in this article may include any one or a combination of more of the associated listed items depending on the actual situation.

[First Embodiment]

FIG. 1 is a flowchart of a method for calibrating a display module according to a first embodiment of the present invention. 2 is a schematic diagram of a display module calibration system applying the display module calibration method of the first embodiment of the present invention.

Referring to FIG. 1 and FIG. 2, this embodiment provides a display module calibration method, which includes the following steps:

Provide a light test signal to a display module to be tested to obtain a brightness uniformity information of the display device to be tested (step S110);

According to the judgment of brightness uniformity information, when the display module to be tested is in a state of non-uniform brightness, a split screen signal is provided to the display module to be tested, and the display module to be tested is divided into a first split screen area and a second Two split screen area (step S120);

Obtain an average brightness difference information between the first split screen area and the second split screen area (step S130);

Adjust a grayscale value of the first or second sub-screen area of the display module to be tested according to the average brightness difference information (step S140);

Please continue to refer to FIGS. 1 and 2, the display module calibration system 1 includes a display module detection device 10 and a display module 11 to be tested. The display module 11 to be tested is a large-sized display module, including but not limited to, the size thereof is, for example, 32 inches to 120 inches. The resolution of the display module 11 to be tested may be 4K resolution or 8K resolution. 4K resolution includes at least two resolutions of 3840*2160 and 4096*2160; 8K resolution includes at least 7680*4320 resolution.

The display module 11 to be tested includes a plurality of pixel blocks 11BL. In the first embodiment of the present case, the display module 11 to be tested is a 4K resolution display module, including 3840*2160 pixels or 4096*2160 pixels, but not limited to this.

3 is a schematic diagram of the structure of the display module detection device in the first embodiment of the present invention.

Referring to FIGS. 2 and 3, in step S110, the display module detection device 10 provides a one-point light test signal to the display module under test 11 to perform a brightness uniformity test. The display module detection device 10 includes a processing module 10a, a memory module 10b, and a communication module 10c. The processing module 10a of the display module detection device 10 is connected to the display module 11 to be tested through the communication module 10c, and provides a plurality of lighting test signals and split-screen signals to the display module 11 to be tested. The processing module 10a is electrically connected to the memory module 10b and the communication module 10c. A plurality of lighting test procedures and a plurality of calibration procedures are stored in the memory module 10b.

In step S120, when the display module 11 to be tested has a non-uniform brightness state, the calibration procedure of the display module detection device 10 will provide a first split screen signal S1 to the display module 11 to be tested. In the first embodiment of the present case, the lighting test program is used to detect the brightness uniformity of all pixel blocks 11BL of the display module 11 to be tested, and the lighting test signal is transmitted back to the processing mode of the display module detection device 10 Group 10a is used to calculate brightness uniformity information.

Please refer to FIG. 2, the first split-screen signal S1 of the display module detection device 10 first divides the display module 11 to be tested into two areas. In this embodiment, the first split screen signal S1 divides the display module 11 to be tested into two equal-sized left and right regions from the center, including a first split screen area 11A and a second split screen area 11B. Furthermore, the first split-screen area 11A and the second split-screen area 11B of the display module 11 to be tested are divided into a plurality of sub-areas according to a pixel block 11BL of PxP pixels. Among them, P is a natural number, and P is greater than or equal to 2.

In this embodiment, the pixel block 11BL is an 8x8 pixel block. When the display module under test 11 includes 3840*2160 pixels, the first split screen area 11A of the display module under test 11 includes NxM pixel blocks 11BL, and the second split screen of the display module under test 11 The area 11B also includes N×M pixel blocks 11BL. Among them, N is equal to 270 and M is equal to 480. In this embodiment, there is a split screen reference line J between the first split screen area 11A and the second split screen area B. The split screen reference line J is a virtual reference line. Taking the split-screen reference line J as a reference, to the left are the first sub-region J-1, the second sub-region J-2, the third sub-region J-3, and the fourth sub-region J- of the first split-screen area 11A. 4. The fifth subregion J-5 and the Nth subregion JN. The first sub-area J-1, the second sub-area J-2, the third sub-area J-3, the fourth sub-area J-4, and the fifth sub-area J-5 of the first split-screen area 11A are in sequence. The adjacent sub-area. To the right is the first sub-area J+1, the second sub-area J+2, the third sub-area J+3, the fourth sub-area J+4, and the fifth sub-area J+5 of the second split screen area 11B. And the Nth subregion J+N. The first sub-area J+1, the second sub-area J+2, the third sub-area J+3, the fourth sub-area J+4, and the fifth sub-area J+5 of the second split screen area 11B are sequentially phased. The adjacent sub-area.

4 is a schematic diagram of the display module detection device in the first embodiment of the present invention performing calibration according to the first split screen signal. Please refer to FIG. 2 and FIG. 4. Next, in step S130, the calibration procedure of the display module detection device 10 selects to light up the first sub-region J-1 of the first split-screen region 11A and the second split-screen region 11B. The first sub-region J+1 is used to obtain an average brightness difference value D _{1 of the} first sub-region. The average brightness difference value D _{1 of the first sub-region is based on the number of pixel blocks A 1,1} -A _1,270 in the first sub-region J-1 of the first sub-region 11A and the first sub-region 11B. _{The brightness difference values between the multiple pixel blocks B 1,1} -B _{1,270 in the} sub-region J+1 are calculated by adding up and the average value. That is, the average brightness difference value D _{1 of the} first sub-region can be calculated according to the following formula 1.

- 公式1

- Formula 1

Among them, D _k is the average brightness difference value of the sub-region, and k is between 1-M. In this embodiment, k only takes 1 to 5. In this embodiment, including but not limited to, D _k can be obtained by using a look-up table method, such as a gray-scale compensation table (Compensation Table) search to obtain a brightness compensation value, and the display module detection device 10 then treats it according to the brightness compensation value. The test display module 11 performs adjustment and compensation. In this embodiment, A _1,i are the brightness values of each pixel block 11BL in the first sub-region J-1 of the first split screen area 11A, i is between 1 and N, where N is A natural number, N is greater than or equal to 2. In this embodiment, N is 270, that is, the number of vertical pixels 2160 divided by the 8 pixels of each pixel block 11BL is equal to 270. B _1,i is the brightness value of each pixel block 11BL in the first sub-region J+1 of the second split screen area 11B, i is between 1 and N, where N is a natural number, and N is greater than Equal to 2. In this embodiment, N is 270, that is, the number of vertical pixels 2160 divided by the 8 pixels of each pixel block 11BL is equal to 270. In this embodiment, the number of pixel blocks 11BL can be adjusted according to actual requirements, and is not limited in the present invention.

According to formula 1, the average brightness difference value D ₁ of the first sub-region is the same as the first sub-region J-1 of the adjacent first split-screen region 11A and the first sub-region J+1 of the second split-screen region 11B. After the difference of the brightness values of the pixel blocks 11BL of the column is added up, the average calculation is performed.

Next, in step S140, the display correction program module detection device 10 displays a plurality of blocks of pixels within the first sub-screen region 11A 11BL module 11 according to a first sub-region average luminance measured difference value D ₁ treated Or the brightness of the multiple pixel blocks 11BL in the second split screen area 11B of the display module 11 to be tested is adjusted and compensated. The adjustment and compensation method is to obtain a preset grayscale value according to the brightness uniformity information, and the multiple pixel blocks 11BL in the first split-screen area 11A of the display module under test 11 or the second display module 11 under test Multiple pixel blocks 11BL in the split screen area 11B, the pixel block 11BL whose grayscale value exceeds the preset grayscale value minus the compensation value found from the grayscale compensation table, the grayscale value is less than the preset grayscale value The pixel block 11BL of the gray scale value is added with the compensation value obtained from the gray scale compensation table.

5 is a schematic diagram of the display module detection device in the first embodiment of the present invention performing calibration according to the second split screen signal. 6 is a schematic diagram of the display module detection device in the first embodiment of the present invention performing calibration according to the third split screen signal. FIG. 7 is a schematic diagram of the display module detection device in the first embodiment of the present invention performing calibration according to the fourth split screen signal. FIG. 8 is a schematic diagram of the display module detection device in the first embodiment of the present invention performing calibration according to the fifth split screen signal.

Please refer to FIGS. 5 to 8. Next, the calibration procedure of the display module detection device 10 sequentially provides a second split-screen signal S2, a third split-screen signal S3, a fourth split-screen signal S4, and a fifth split-screen signal S4. The screen signal S5 is sent to the display module 11 to be tested, and the above step S130 is performed to sequentially obtain a second sub-area average brightness difference value D ₂ , a third sub-area average brightness difference value D ₃ , and a fourth sub-area brightness The average difference value D ₄ and the average brightness difference value D _{5 of} a fifth sub-region. Finally, the calibration program executes the above step S140, according to the second sub-region average brightness difference value D ₂ , the third sub-region brightness average difference value D ₃ , the fourth sub-region brightness average difference value D ₄ and the fifth sub-region brightness average difference value The value D ₅ sequentially includes multiple pixel blocks 11BL in the first split screen area 11A of the display module 11 to be tested or multiple pixel blocks in the second split screen area 11B of the display module 11 to be tested The brightness of 11BL is adjusted and compensated.

It is worth noting that the average brightness difference value D ₂ of the second sub-region is caused by the calibration procedure of the display module detection device 10 to light up the second sub-region J-2 of the first split-screen region 11A and the second split-screen region 11B. The second sub-region J+2 is obtained; the average brightness difference value D ₃ of the third sub-region is illuminated by the calibration procedure of the display module detection device 10 to light up the third sub-region J-3 and the second sub-region 11A of the first split screen region 11A. The third sub-area J+3 of the split-screen area 11B is obtained; the average brightness difference value D ₄ of the fourth sub-area is the fourth sub-area J of the first split-screen area 11A that is illuminated by the calibration program of the display module detection device 10 -4, and a fourth sub-region of the second region 11B of the split screen to obtain J + 4; and a fifth sub area luminance average difference value D ₅ is lit by the correction module displays a first detection device 10 split screen region 11A The fifth sub-area J-5 and the fifth sub-area J+5 of the second split screen area 11B are obtained.

After the calibration procedure performs the compensation adjustments of step S130 and step S140 in turn, the brightness uniformity of the multiple pixel blocks 11BL of the first split screen area 11A and the second split screen area 11B of the display module 11 to be tested can be effective To improve.

[Second Embodiment]

9 is a schematic diagram of the display module detection device in the second embodiment of the present invention performing calibration according to another group of screen signals.

Referring to FIG. 9, in the second embodiment of the present invention, the display module detection device 10 can provide the first split-screen signal S1' to the fifth split-screen signal S5' to the display module 11 to be tested, and sequentially light up the first split screen signal S1' to the fifth split screen signal S5' The fifth sub-area J-5, the fourth sub-area J-4, the third sub-area J-3, the second sub-area J-2, the first sub-area J-1, and the second sub-area of the one split screen area 11A The fifth sub-region J+5, the fourth sub-region J+4, the third sub-region J+3, the second sub-region J+2, and the first sub-region J+1 of the zone 11B. That is, the first split-screen signal S1' to the fifth split-screen signal S5' are two fifth sub-regions that are not adjacent to the outside of the five sub-regions of the first split-screen area 11A and the second split-screen area 11B. +5, J-5 starts the calculation of the average brightness difference of the sub-regions, and calculates the average brightness difference of the sub-regions in the two adjacent first sub-regions J+1 and J-1 in order. That is, the labels of the sub-regions may be marked from the inside of the middle area, or may be marked from the outside of the middle area of the first divided screen area 11A and the second divided screen area 11B.

In the first and second embodiments of the present case, when the display module under test 11 performs a lighting test procedure according to the lighting test signal, and a non-uniform brightness state occurs, the display module detection device 10 sequentially provides multiple A split-screen signal is sent to the display module 11 to be tested. The multiple split-screen signals first divide the display module 11 to be tested into a first split-screen area 11A and a second split-screen area 11B. Then the display module detection device 10 will obtain the brightness average of the multiple sub-regions J-1-J-5 of the first split-screen area 11A and the multiple sub-regions J+1-J+5 of the second split-screen area 11B. Difference value. The display module under test 11 sequentially adjusts the gray levels of the pixel blocks 11BL in the first split screen area 11A or the second split screen area 11B of the display module under test 11 according to the average brightness difference values of the multiple sub-regions. Order value. The multiple sub-regions J-1-J-5 of the first split-screen area 11A and the multiple sub-regions J+1-J+5 of the second split-screen area 11B are all located in the middle of the display module 11 to be tested.

The display module detection device 10 of the display module calibration system 1 only calculates and compensates the sub-region brightness average difference value of the display module 11 to be tested five times. In other embodiments, the display module detection device 10 may The display module 11 performs calculation and compensation of the average brightness difference value of the sub-region less than five times or more than five times, which is not limited in the present invention. That is, the display module detection device 10 can also select more than five sub-regions to calculate the average brightness difference value of the sub-regions.

In other embodiments, the multiple sub-areas of the first split screen area 11A selected by the display module detection device 10 may be adjacent or non-adjacent. Similarly, the multiple sub-areas of the second split screen area 11B selected by the display module detection device 10 may be adjacent or non-adjacent. The calculation sequence of the average brightness difference value of the sub-regions can also be adjusted according to actual requirements, which is not limited in the present invention.

The display module calibration system and display module calibration method provided by the present invention are to capture the pixel blocks of the display module to be tested and calculate the average brightness difference value to calculate the pixel area of the display module to be tested. Block compensation to improve the brightness uniformity, while saving calculations and testing time. In addition, the display module calibration system and the display module calibration method provided by the present invention can also restore the originally unrepairable split-screen defect into a normal effect, effectively improving the execution rate of the calibration.

The content provided above is only the preferred and feasible embodiments of the present invention, and does not limit the scope of the patent application of the present invention. Therefore, all equivalent technical changes made by using the description and schematic content of the present invention are included in the application of the present invention. Within the scope of the patent.

1: Display module calibration method 10: Display module detection device 11: Display module to be tested 10a: Processing module 10b: Memory module 10c: Communication module 11A: First split screen area 11B: Second split screen Area N, M, P: natural number 11 BL: pixel block A _1,1- A _{1, N} , B _1,1- B _{1, N} : multiple pixel blocks A _{2, 1 in the first sub-region - a 2, N, B 2,1-} B 2, N: a plurality of pixel blocks of the second sub-region _{3,1- a 3, N, B 3,1-} B 3, N: third sub Multiple pixel blocks A _4,1- A _4,N , B _4,1- B _{4,N in the} area: Multiple pixel blocks A _5,1- A _5,N , B in the fourth sub-area _5,1- B _5,N : Multiple pixel blocks in the fifth sub-area J-1: First sub-area of the first split-screen area J-2: Second sub-area of the first split-screen area J- 3: The third sub-area of the first split-screen area J-4: The fourth sub-area of the first split-screen area J-5: The fifth sub-area of the first split-screen area J+1: The second sub-area of the second split-screen area The first sub-area J+2: the second sub-area of the second split-screen area J+3: the third sub-area of the second split-screen area J+4: the fourth sub-area of the second split-screen area J+5: The fifth sub-area S1-S5, S1'-S5' of the second split-screen area: the first split-screen signal to the fifth split-screen signal S110-S140: Step J: Split-screen baseline

FIG. 1 is a flowchart of a method for calibrating a display module according to a first embodiment of the present invention.

2 is a schematic diagram of a display module calibration system applying the display module calibration method of the first embodiment of the present invention.

3 is a schematic diagram of the structure of the display module detection device in the first embodiment of the present invention.

4 is a schematic diagram of the display module detection device in the first embodiment of the present invention performing calibration according to the first split screen signal.

5 is a schematic diagram of the display module detection device in the first embodiment of the present invention performing calibration according to the second split screen signal.

6 is a schematic diagram of the display module detection device in the first embodiment of the present invention performing calibration according to the third split screen signal.

FIG. 7 is a schematic diagram of the display module detection device in the first embodiment of the present invention performing calibration according to the fourth split screen signal.

FIG. 8 is a schematic diagram of the display module detection device in the first embodiment of the present invention performing calibration according to the fifth split screen signal.

9 is a schematic diagram of the display module detection device in the second embodiment of the present invention performing calibration according to another group of screen signals.

1: Display module calibration method

10: Display module detection device

11: Display module to be tested

11A: The first split screen area

11B: The second split screen area

N, M, P: natural numbers

11BL: pixel block

J-1: The first sub-area of the first split screen area

J-2: The second sub-area of the first split screen area

J-3: The third sub-area of the first split screen area

J-4: The fourth sub-area of the first split screen area

J-5: The fifth sub-area of the first split screen area

J+1: The first sub-area of the second split screen area

J+2: The second sub-area of the second split screen area

J+3: The third sub-area of the second split screen area

J+4: The fourth sub-area of the second split screen area

J+5: The fifth sub-area of the second split screen area

S1-S5: The first split-screen signal to the fifth split-screen signal

J: Split screen baseline

Claims (22)

A method for calibrating a display module includes the following steps: providing a light test signal to a display module to be tested to obtain a brightness uniformity information of the display device to be tested; judging based on the brightness uniformity information, when the test signal is to be tested When the display module is in a state of non-uniform brightness, a split screen signal is provided to the display module to be tested, and the display module to be tested is divided into a first split screen area and a second split screen area; A brightness average difference information between a split screen area and the second split screen area; and adjust one of the first split screen area or the second split screen area of the display module to be tested according to the brightness average difference information Grayscale value; wherein the display module to be tested has a plurality of pixel blocks, and the display module to be tested is divided into the first split screen area and the second split screen area according to a split screen reference line located at the center The split screen area, and the first split screen area and the second split screen area have an equal number of pixel blocks. The display module calibration method according to claim 1, wherein the first split-screen area and the second split-screen area each have a sub-area, the sub-areas each have a part of the pixel blocks, the The sub-regions have the same number of pixel blocks. The display module calibration method according to claim 2, wherein the average brightness difference information is calculated by first calculating the sub-areas of the first split screen area and the second split screen area along the split screen reference The sum of the brightness difference between the pixel blocks corresponding to the line is divided by the number of the pixel blocks in each of the sub-regions to obtain an average brightness difference value. The display module calibration method according to claim 1, wherein the first split-screen area and the second split-screen area each have a plurality of sub-areas, and the sub-areas respectively have a part of the pixel blocks, and the sub-areas The sub-regions have the same number of pixel blocks. The display module calibration method according to claim 4, wherein the display module to be tested is After the group is divided into the first divided screen area and the second divided screen area, a plurality of average brightness difference information of the sub-areas are obtained respectively. The average brightness difference information of the sub-areas are respectively: The sum of the brightness differences between the pixel blocks corresponding to the reference line of the split screen in a split screen area and the sub-regions of the second split screen area is divided by the sum of the brightness differences in each of the sub-regions. With the number of pixel blocks, a plurality of average brightness difference values are obtained. The display module calibration method according to claim 5, wherein after obtaining the average brightness difference information, the first sub-screen area or the second sub-screen area of the display module to be tested is sequentially adjusted according to the average brightness difference information The grayscale value of the two-split screen area. The display module calibration method according to claim 5, wherein after the display module to be tested is divided into the first split screen area and the second split screen area, the display modules are divided in order outward from the split screen reference line. Obtain the average brightness difference information of the sub-regions. The display module calibration method according to claim 4, wherein the sub-areas of the first split-screen area are arranged adjacent to each other, the sub-areas of the second split-screen area are arranged adjacent to each other, and the second A split screen area and the sub-regions of the second split screen area close to the split screen reference line are arranged adjacent to each other. The display module calibration method according to claim 4, wherein the sub-areas of the first split-screen area are spaced apart from each other, and the sub-areas of the second split-screen area are spaced apart from each other. The display module calibration method according to claim 1, wherein each of the pixel blocks includes P×P pixels, and P is greater than or equal to 2. The display module calibration method according to claim 10, wherein each of the pixel blocks includes 8×8 pixels. A display module calibration system includes: a display module detection device that provides a one-point light detection signal and a split screen signal; and a display module to be tested, which is electrically connected to the display module detection device, and receives the lighting Detection signal and the split screen signal; wherein, when the display module to be tested is in a state of non-uniform brightness, the display module detection device provides the split screen signal to the display module to be tested, and the display module to be tested The group is divided into a first split-screen area and a second split-screen area, and a brightness average difference information between the first split-screen area and the second split-screen area is acquired, and the display module detection device is based on the brightness The average difference information adjusts a grayscale value of the first or second sub-screen area of the display module to be tested; wherein the display module to be tested has a plurality of pixel blocks, and is based on a The split-screen reference line at the center divides the display module to be tested into the first split-screen area and the second split-screen area, and the first split-screen area and the second split-screen area have an equal number of pictures Prime block. The display module calibration system according to claim 12, wherein the first split-screen area and the second split-screen area each have a sub-area, the sub-areas each have a part of the pixel blocks, the The sub-regions have the same number of pixel blocks. The display module calibration system according to claim 13, wherein the average brightness difference information is that the display module detection device first calculates among the sub-regions of the first split-screen area and the second split-screen area, The sum of the brightness differences between the pixel blocks corresponding to the split screen reference line is divided by the number of the pixel blocks in each of the sub-regions to obtain an average brightness difference value. The display module calibration system according to claim 12, wherein the first split-screen area and the second split-screen area respectively have a plurality of sub-areas, and the sub-areas respectively have a part of the pixel blocks, and the The sub-regions have the same number of pixel blocks. The display module calibration system according to claim 15, wherein the display module detection device separates the display module to be tested into the first split-screen area and the second split-screen area, and then obtains the sub-screens respectively. The plurality of brightness average difference information of the area, the brightness average difference information of the sub-areas are respectively, the display module detection device Calculate the sum of the brightness differences between the pixel blocks corresponding to the baseline of the split screen in the first split screen area and the second split screen area in the first, and then divide by each of the sub-regions. The number of the pixel blocks in the sub-regions is used to obtain a plurality of average brightness difference values. The display module calibration system according to claim 16, wherein, after the display module detection device obtains the brightness average difference information, it sequentially adjusts the first of the display module to be tested according to the brightness average difference information. The grayscale value of the split screen area or the second split screen area. The display module calibration system according to claim 16, wherein after the display module to be tested is divided into the first split screen area and the second split screen area, the display modules are divided into the first split screen area and the second split screen area. Obtain the average brightness difference information of the sub-regions. The display module calibration system according to claim 15, wherein the sub-areas of the first split-screen area are arranged adjacent to each other, the sub-areas of the second split-screen area are arranged adjacent to each other, and the second A split screen area and the sub-regions of the second split screen area close to the split screen reference line are arranged adjacent to each other. The display module calibration system according to claim 15, wherein the sub-areas of the first split screen area are spaced apart from each other, and the sub-areas of the second screen split area are spaced apart from each other. The display module calibration system according to claim 12, wherein each of the pixel blocks includes P×P pixels, and P is greater than or equal to 2. The display module calibration system according to claim 21, wherein each of the pixel blocks includes 8×8 pixels.

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