A brightness detection method and a brightness detection system for a display device

Abstract

The present application discloses a brightness detection method for a display device. The display device includes: a plurality of spliced display modules, and each display module has a plurality of sub-pixels. The brightness detection method includes: determining the splicing positions of the display modules in the display device; based on the splicing positions, sequentially obtaining the brightness detection information of the display modules; and based on the brightness detection information, determining the display brightness of the sub-pixels. Wherein, the display brightness is used to determine the correction data signal of the sub-pixels. The technical solution of the present application avoids the influence of the splicing positions on the display brightness of the sub-pixels when uniformly detecting the brightness of all display modules of the entire display device at the same time, and thus can ensure the accuracy of the correction data signal of the sub-pixels, so as to facilitate the implementation of accurate display compensation and improve the display uniformity.

Description

Technical Field

[0001] The present application relates to the technical field of display device detection, and more specifically, to a method and system for detecting the brightness of a display device. Background Art

[0002] With the continuous progress of science and technology, more and more display devices are widely used in people's daily lives and work, bringing great convenience to people's daily lives and work, and becoming an indispensable important tool for people today.

[0003] The display device itself has obvious complexity. Not only is the production process highly complex, but it also has high requirements for the production environment, that is, the production workshop needs to maintain a dust-free state. However, even under the production conditions of a dust-free workshop, due to current technical process limitations, there is still a high probability that uneven display problems (mura) will occur when the finally prepared display device performs image display.

[0004] In order to solve the problem of uneven display of the display device, brightness compensation (Demura) technology is required to perform display compensation on the display device to improve the uniformity of its image display. Accurately detecting and determining the display brightness of sub-pixels in the display device is a key factor in achieving accurate display compensation. How to accurately determine the display brightness of sub-pixels in the display device is an urgent problem to be solved in the technical field of display device detection. Summary of the Invention

[0005] In view of this, the present application provides a method and system for detecting the brightness of a display device, and the solutions are as follows:

[0006] The present application provides a method for detecting the brightness of a display device, where the display device includes: a plurality of spliced display modules, and the display module has a plurality of sub-pixels;

[0007] The brightness detection method includes:

[0008] Determine the splicing position of the display modules in the display device;

[0009] Based on the splicing position, obtain the brightness detection information of the display modules one by one;

[0010] Based on the brightness detection information, determine the display brightness of the sub-pixels; wherein, the display brightness is used to determine the correction data signal of the sub-pixels.

[0011] The present application also provides a brightness detection system for the above brightness detection method, which is characterized by including:

[0012] A host, which is used to determine the splicing position of display modules in a display device. Based on the splicing position, the brightness detection information of each display module is obtained one by one. Based on the brightness detection information, the display brightness of sub-pixels is determined. Among them, the display brightness is used to determine the display brightness of the sub-pixels. Among them, the display brightness is used to determine the calibration data signal of the sub-pixels.

[0013] As can be seen from the above description, the brightness detection method and system for a display device provided by the technical solution of this application can be used for the brightness detection of a large-size display device composed of multiple spliced display modules. Based on the determined splicing position of the display modules in the display device, the brightness detection information of each display module is obtained one by one. Then, the display brightness of the sub-pixels in the display module is determined through the brightness detection information, avoiding the influence of the splicing position on the display brightness of the sub-pixels when uniformly detecting the brightness of all display modules of the entire display device at the same time. Furthermore, it can ensure the accuracy of the calibration data signal of the sub-pixels, so as to facilitate accurate display compensation and improve display uniformity. It can be seen that the technical solution of this application can accurately collect the brightness of a large-size display device formed by splicing multiple display modules, and then achieve accurate display compensation and improve display uniformity. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of this application or related technologies, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of this application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the provided drawings.

[0015] The structures, ratios, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those who are familiar with this technology to understand and read, and are not used to limit the limited conditions that this application can be implemented. Therefore, they do not have technical substance. Any modification of the structure, change of the proportional relationship, or adjustment of the size, without affecting the effects that this application can produce and the purposes that can be achieved, should still fall within the scope that the technical content disclosed in this application can cover.

[0016] Figure 1 It is a schematic diagram of the principle for collecting brightness information of a non-spliced display device;

[0017] Figure 2 It is a schematic diagram of the principle for collecting brightness information of a display device spliced by multiple display modules;

[0018] Figure 3 It is a schematic flowchart of a method for detecting the brightness of a display device provided by an embodiment of this application;

[0019] Figure 4 Schematic flowchart of a method for determining splicing position provided by an embodiment of the present application;

[0020] Figure 5 Schematic diagram of the principle of collecting a first image provided by an embodiment of the present application;

[0021] Figure 6 Flowchart of a method for obtaining brightness detection information of a display module provided by an embodiment of the present application;

[0022] Figure 7 Schematic diagram of the principle of collecting a second image provided by an embodiment of the present application;

[0023] Figure 8 Flowchart of a method for obtaining brightness detection information provided by an embodiment of the present application;

[0024] Figure 9 Schematic diagram of the principle of the acquisition sequence of brightness detection information of a display module in a display device provided by an embodiment of the present application;

[0025] Figure 10 Flowchart of a method for determining a sub-pixel correction data signal provided by an embodiment of the present application;

[0026] Figure 11 Schematic diagram of the structure of a brightness detection system provided by an embodiment of the present application;

[0027] Figure 12 Schematic diagram of the structure of another brightness detection system provided by an embodiment of the present application. Detailed implementation manners

[0028] Next, the embodiments in the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0029] The display brightness compensation technology is a method for eliminating the display of a display device by adjusting the brightness of sub-pixels, and has been widely used in the display field, and can be used for display compensation of LCD, OLED, and micro LEDs (such as Mini LED or Micro LED).

[0030] When performing display compensation on a display device, it is necessary to photograph the image displayed by the display device with a high-resolution photographing device to obtain brightness detection information, so as to compensate the display brightness of sub-pixels and improve the display uniformity of the display device. Generally, a high-resolution CCD camera is used to photograph the display device. The accurate sampling of the sub-pixel brightness in the display device by the CCD camera is the basis for the normal operation of the display brightness compensation technology.

[0031] Conventional display brightness compensation technology generally uses a CCD camera with a resolution much higher than that of the display device to photograph the entire display device to obtain the actual display brightness of the sub-pixels in the display device, so as to perform display compensation on it subsequently. Among them, the method of obtaining the actual display brightness of sub-pixels is generally to partition the photographed image based on the actual resolution of the display device to form multiple partitions corresponding one by one to the sub-pixels in the display device, and the brightness of each partition is the display brightness of the corresponding sub-pixel.

[0032] Using the above method, when collecting brightness detection information for a display device composed of multiple display modules spliced together, there is a problem of local sub-pixel brightness data distortion, resulting in inaccurate brightness detection information. This is because there are certain process errors in the splicing process, and it is impossible to achieve precise alignment of the sub-pixels of two adjacent display modules in the horizontal and vertical directions at the splicing position. Moreover, this process error has a tolerance range, that is, the deviations at different splicing positions are different. If the photographed image is processed according to the actual resolution of the display device to determine the display brightness of each sub-pixel, due to the deviation caused by the above splicing position, some sub-pixels will deviate from the corresponding partition, resulting in the determined display brightness of the sub-pixels deviating from the actual display brightness.

[0033] Reference Figure 1 and Figure 2 shown, Figure 1 is a schematic diagram of the principle of collecting brightness information for a non-spliced display device, Figure 2 is a schematic diagram of the principle of collecting brightness information for a display device composed of multiple display modules spliced together. As described above, a high-resolution CCD camera is used to photograph the display device, and using an image processing method, based on the actual resolution of the display device, the image area is partitioned by vertical and horizontal resolution partition lines 12, and the display image of the display device obtained by photographing with the CCD camera is divided into multiple partitions corresponding one by one to the sub-pixels 11 in the display device.

[0034] In Figure 1In the shown manner, for a display device without overall splicing, the sub-pixels 11 are arranged in a uniform array. Based on the actual resolution of the display device, the partitions defined by the resolution partition lines 12 can be accurately aligned with the sub-pixels 11 in the display device. At this time, the centers of the sub-pixels coincide with the centers of the corresponding partitions, and the display brightness of the corresponding sub-pixels can be accurately characterized by the brightness of the corresponding partitions in the image, and the display brightness of the corresponding sub-pixels 11 can be accurately determined.

[0035] In Figure 2 the shown manner, for a display device formed by splicing multiple display modules, due to the splicing process error, there is a position deviation between two adjacent display modules at the splicing position. Figure 2 The left and right parts in it respectively represent two display modules. In the left display module, the sub-pixels are illustrated by black rectangular boxes, and in the right display module, the sub-pixels 11 are illustrated by boxes without filled colors. Due to the splicing process error at the splicing position of the two display modules, the sub-pixels 11 in the same row of the display device are misaligned at the splicing position. In this way, when partitioning the photographed image, the positions of the sub-pixels 11 in the right display module will deviate from the center positions of the corresponding partitions. Since the positions of the sub-pixels 11 in the right display module deviate from the center positions of the corresponding partitions, for the sub-pixels 11 in the right display module, when determining the display brightness of the corresponding sub-pixels 11 based on the brightness of the partitions in the photographed image, the determined display brightness is not the true brightness of the sub-pixels 11 in the photographed image, resulting in a deviation between the final result and the actual brightness of the sub-pixels 11. Further, if the display brightness compensation is performed on the sub-pixels based on the determined display brightness of the sub-pixels 11 at this time, the final compensation result cannot well eliminate the problem of uneven display, and even makes the problem of uneven display more serious.

[0036] In view of this, the technical solution provided by the embodiments of the present application can be used for the brightness detection of a large-size display device with multiple spliced display modules. Based on the determined splicing positions of the display modules in the display device, the brightness detection information of the display modules is obtained one by one, and then the display brightness of the sub-pixels in the display modules is determined through the brightness detection information, avoiding the influence of the splicing position on the display brightness of the sub-pixels when the brightness detection is simultaneously performed on all display modules of the entire display device, and thus being able to ensure the accuracy of the correction data signal of the sub-pixels, so as to facilitate the implementation of accurate display compensation and improve the display uniformity. It can be seen that the technical solution of the present application can accurately collect the brightness of a large-size display device formed by splicing multiple display modules, and then achieve accurate display compensation and improve the display uniformity.

[0037] To make the above objects, features, and advantages of the present application more obvious and understandable, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0038] Reference Figure 3 , Figure 3 is a schematic flowchart of a method for detecting the brightness of a display device provided by an embodiment of the present application. The display device includes: a plurality of spliced display modules, and each display module has a plurality of sub-pixels. The brightness detection method includes:

[0039] Step S11: Determine the splicing position of the display modules in the display device.

[0040] Step S12: Based on the splicing position, obtain the brightness detection information of each display module one by one.

[0041] Step S13: Based on the brightness detection information, determine the display brightness of the sub-pixels; wherein, the display brightness is used to determine the correction data signal of the sub-pixels.

[0042] In the brightness detection method provided by the embodiment of the present application, for a display device formed by splicing a plurality of display modules, first determine the splicing position between the display modules, determine the area of each display module in the display device. When the display device is displaying an image, according to the determined splicing position, obtain the brightness detection information of each display module one by one, and then determine the display brightness of the sub-pixels in the display module through the brightness detection information, avoiding the influence of the splicing position on the display brightness of the sub-pixels when uniformly detecting the brightness of all display modules of the entire display device at the same time. Furthermore, it can ensure the accuracy of the correction data signal of the sub-pixels, so as to facilitate accurate display compensation and improve display uniformity. It can be seen that the technical solution of the present application can accurately collect the brightness of a large-size display device formed by splicing a plurality of display modules, and then achieve accurate display compensation and improve display uniformity.

[0043] Reference Figure 4 shown in Figure 4 is a schematic flowchart of a method for determining the splicing position provided by an embodiment of the present application. The method for determining the splicing position of the display modules in the display device is as Figure 4 shown in, and the method includes:

[0044] Step S21: Adjust the image acquisition device to have a first acquisition distance from the display side of the display device.

[0045] Step S22: At the first acquisition distance, acquire the first image displayed by the display device through the image acquisition device.

[0046] Step S23: Determine the splicing position of the display modules in the display device according to the brightness information of the first image.

[0047] When collecting the first image, the display module always performs image display so that the display device displays the first image; at the first acquisition distance, the display module is always within the field of view of the image display device, that is, at the first acquisition distance, the entire display area of the display device is within the field of view of the image acquisition device, and the first image jointly displayed by all display modules in the display device can be acquired through the image acquisition device.

[0048] Reference Figure 5 shown in Figure 5 is a schematic diagram of the principle of collecting the first image provided by an embodiment of the present application. At the first acquisition distance, all display modules are within the field of view of the image display device. Figure 5 In [the figure], the display device 21 is marked with a dotted line diagram and includes two display modules. It is easy to know that the display device 21 may include any number of display modules, and the multiple display modules are arranged in an array. For example, it can be set that the display device has M rows * N columns of display modules, both M and N are positive integers, and at least one of them is greater than 1.

[0049] Since the resolution of the image acquisition device 22 is much higher than that of the display device 21, the image acquisition device 22 can, at the first acquisition distance, make the collected first image include the splicing positions between any two adjacent display modules. There is a display brightness difference between the splicing position and the display areas of the two adjacent display modules on both sides, so based on the brightness information in the first image, the splicing positions between two adjacent display modules can be determined.

[0050] Reference Figure 6 shown in Figure 6 is a flowchart of a method for obtaining the brightness detection information of the display module provided by an embodiment of the present application. The method for obtaining the brightness detection information of the display module one by one based on the splicing position is as Figure 5 shown in [the figure], and the method includes:

[0051] Step S31: Adjust the second acquisition distance between the image acquisition device and the display side of the display device, and the second acquisition distance is less than the first acquisition distance.

[0052] Step S32: At the second acquisition distance, collect the second images of the display modules one by one through the image acquisition device.

[0053] Among them, the second image includes brightness detection information.

[0054] Based on Figure 6In the manner shown, the second images of each display module can be obtained one by one, and then the brightness detection information thereof can be obtained, which can avoid the influence of the splicing position on the sub-pixel display brightness and improve the accuracy of the sub-pixel display brightness information. Moreover, the sub-pixel distribution inside each display module is determined based on the sub-pixel design of the display module, and the distribution accuracy can be guaranteed. Between two adjacent spliced display modules, the sub-pixels belonging to the two display modules cannot achieve the same distribution design of the sub-pixels in the same display module at the splicing position. Based on the method of collecting the second images one by one in this application, the influence of the sub-pixel distribution difference near the splicing position on the accuracy and accuracy of the brightness detection information can be solved.

[0055] Reduce the distance between the image acquisition device and the display device. At a smaller second acquisition distance, collect the second images displayed by each display module one by one. The second image of the display module includes its brightness detection information.

[0056] In Figure 6 In the manner shown, the second image can be a partial image of the first image displayed by the display module. In other manners, the second image is an image different from the partial image of the above first image.

[0057] Refer to Figure 7 shown, Figure 7 As shown in the schematic diagram of the principle of collecting the second image provided by the embodiment of the present application, at the second acquisition distance, the second images displayed by each display module in the display device 21 are respectively collected by the image acquisition device 22.

[0058] Optionally, a mechanical driving device can be used to control the movement of the image acquisition device 22, and on the premise of maintaining the second acquisition distance, the second images displayed by each display module are respectively collected. Compared with the method of moving a large-size display device, the method of moving the image acquisition device 22 is more convenient to operate.

[0059] In the brightness detection method provided by the embodiment of the present application, when obtaining the brightness detection information, control the sub-pixels in the current display module to display images based on the same to-be-tested gray level. When collecting the brightness detection information of the same display module, control all its sub-pixels to display images based on the same to-be-tested gray level, which is convenient for collecting and correcting the display brightness of different sub-pixels at the same gray level and improves the detection efficiency.

[0060] In the brightness detection method provided by the embodiment of the present application, when obtaining the brightness detection information, control the sub-pixels in different display modules to emit light and display based on the same to-be-tested gray level. When collecting the brightness detection information of each display module one by one, set the sub-pixels in different display modules to display images based on the same to-be-tested gray level, which is convenient for collecting and correcting the display brightness of the sub-pixels in each display module at the same gray level and improves the detection efficiency.

[0061] Reference Figure 8 as shown Figure 8 is a flowchart for obtaining brightness detection information provided by an embodiment of the present application. The display device has n display modules arranged in an array, and n is a positive integer greater than 1. The method for obtaining the brightness detection information of the display modules one by one based on the splicing position is as Figure 8 shown, and the method includes:

[0062] Step S41: Based on the splicing position, set the n display modules to be the 1st display module to the nth display module in sequence; wherein, the ith display module is adjacent to the (i - 1)th display module in the row direction or column direction of the array, and i is a positive integer greater than 1 and not greater than n;

[0063] Step S42: Obtain the brightness detection information of the 1st display module to the nth display module in sequence.

[0064] Reference Figure 9 as shown Figure 9 is a schematic diagram of the principle of the acquisition sequence of the brightness detection information of the display modules in a display device provided by an embodiment of the present application. In this way, with n = 12, the 12 display modules 31 are arranged in a 3 - row * 4 - column array. According to Figure 8 the method shown, setting the ith display module to be adjacent to the (i - 1)th display module in the row direction or column direction of the array can enable 9 display modules 31 to be the 1st display module to the 9th display module in sequence based on the direction shown by the dotted arrow in the figure. Thus, when collecting the brightness detection information of the display modules 31 one by one, the previously collected display module 31 and the next display module 31 to be collected are two adjacent display modules 31 in the array, which is convenient for realizing the acquisition of the brightness detection information of each display module 31 one by one.

[0065] As described above, in an embodiment of the present application, the method for obtaining the brightness detection information of the display modules includes: collecting a second image displayed by the display module, and the second image includes brightness detection information. At this time, the method for determining the correction data signal of the sub - pixel based on the brightness detection information can be as Figure 10 shown.

[0066] Reference Figure 10 as shown Figure 10 is a flowchart of a method for determining the correction data signal of the sub - pixel provided by an embodiment of the present application. The method includes:

[0067] Step S51: Based on the brightness detection information, determine the display brightness of the sub - pixels in the corresponding display module.

[0068] For the second image displayed by the above acquisition and display module, obtain the brightness detection information of the display module. According to the resolution of the display module, the second image is divided into multiple partitions that correspond one-to-one with the sub-pixels in the display module by vertically intersecting resolution partition lines. Since the sub-pixels in the same display module are arranged in a regular array, the centers of the respective partitions can be made to coincide with the centers of the sub-pixels. Therefore, the brightness information of each partition in the second image can represent the brightness information of the corresponding sub-pixel.

[0069] Specifically, the method for determining the display brightness of the sub-pixels includes: First, based on the resolution of the display module, divide the second image into multiple partitions that correspond one-to-one with the sub-pixels in the display module; then, determine the brightness information of the partition in the second image by performing an integration operation on the partition, and use this brightness information as the display brightness of the sub-pixel.

[0070] Step S52: Based on the display brightness, determine the correction data signal of the sub-pixels in the display module.

[0071] Step S53: Aggregate the correction data signals of the sub-pixels in each display module to obtain the correction data signals of all the sub-pixels in the display device.

[0072] Since the brightness detection information of each display module is collected one by one, the brightness detection information of each display module does not affect each other. When processing the second image including the brightness detection information, partition processing is performed according to the resolution of the corresponding display module. After determining the display brightness of the sub-pixels in the display module based on the partition, the required correction data signal can be determined based on the display brightness of the sub-pixels. Finally, the correction data signals of the sub-pixels in different display modules are integrated according to the splicing position to achieve accurate acquisition of the display brightness of the sub-pixels in the entire display device and accurate compensation for the display uniformity of the sub-pixels.

[0073] When collecting the brightness detection information, the brightness detection information will not be affected by the horizontal or vertical splicing deviation generated by the splicing process, and accurate acquisition of the sub-pixel brightness data can be achieved.

[0074] The brightness detection information of each display module is collected independently, and then the display brightness of the sub-pixels can be determined based on the brightness detection information of the display module where the sub-pixels are located, avoiding the problem that when all display modules collect brightness detection information simultaneously, the determined display brightness of the sub-pixels deviates from the actual display brightness of the sub-pixels due to the splicing position deviation. After the display brightness of each sub-pixel inside is determined based on the brightness detection information of the display module respectively, according to the display brightness of the sub-pixels, the corresponding correction data signal is determined, and the correction data signals of the sub-pixels in all display modules are aggregated to obtain the correction data signals of all sub-pixels in the display device. In this way, when the display device performs image display based on the correction data signal, the display uniformity can be improved and the display quality can be enhanced.

[0075] In the embodiments of the present application, the brightness detection information of the display module is collected by an image acquisition device. The image acquisition device can be a CCD camera. As described above, the image displayed by the display module can be collected by the image acquisition device to obtain the brightness detection information of the display panel. At this time, when collecting the brightness detection information, the acquisition distance can be adjusted so that only the currently acquired display module is within the field of view of the image acquisition device. To avoid interference from other display modules to the brightness detection information of the currently acquired display module, when collecting the brightness detection information of the current display module, control the current display module to store the display state, and other display modules are in the dark state, or control all display modules of the display device to be in the display state, and block other display modules through a shielding device.

[0076] In the display device, the sub-pixels in the display module are arranged in an array. In different display modules, the sub-pixel sizes are the same, and the spacing between sub-pixels per unit area is the same, which is convenient for splicing multiple display modules into a large-sized display device and for controlling the display of sub-pixels in the display device after splicing. The sub-pixels can be OLEDs, or LEDs, or micro LEDs.

[0077] Based on the above detection method, another embodiment of the present application also provides a brightness detection system. This brightness detection system can execute the above brightness detection method, and the brightness detection system is as Figure 11 shown.

[0078] Refer to Figure 11 shown, Figure 11 which is a schematic structural diagram of a brightness detection system provided by an embodiment of the present application, including: a host 23. The host 23 is used to determine the splicing position of the display modules in the display device 21, based on the splicing position, obtain the brightness detection information of the display modules one by one, and based on the brightness detection information, determine the display brightness of the sub-pixels; wherein, the display brightness is used to determine the correction data signal of the sub-pixels.

[0079] The host 23 can be connected to the display device 21 and can control the display state of the display device 21 to facilitate obtaining detection parameters related to the display device.

[0080] In the embodiment of the present application, the brightness detection system can sequentially obtain the brightness detection information of the display modules, and then can determine the brightness information of each sub-pixel in the display module according to the corresponding brightness detection information of the display module, avoiding the interference of the splicing position between the display modules on the brightness detection information when obtaining the brightness detection information of multiple display modules simultaneously, and further avoiding the deviation between the display brightness of the sub-pixels and the actual display brightness.

[0081] Reference Figure 12 As shown in Figure 12 FIG. 10 is a schematic structural diagram of another brightness detection system provided by an embodiment of the present application. In this method, the brightness detection system includes: an image acquisition device 22 and a mechanical drive device 24 that are respectively communicatively connected to the host 23; the host 23 is configured to adjust, through the mechanical drive device 24, the image acquisition device 22 to have a first acquisition distance from the display side of the display device 21. At the first acquisition distance, the first image displayed by the display device 21 is acquired through the image acquisition device 22, and the splicing position of the display modules in the display device 21 is determined according to the brightness information of the first image; wherein, when the first image is acquired, all the display modules perform image display so that the display device displays the first image; at the first acquisition distance, all the display modules are within the field of view of the image display device.

[0082] To facilitate changing the relative position between the image acquisition device 22 and the display device 21 through the mechanical drive device 24, the display device 21 is set to be fixed, and the mechanical drive device 24 is used to drive the image acquisition device 22 to move. Obviously, in other methods, the image acquisition device 22 can also be set to be fixed, and the mechanical drive device 24 is used to drive the display device 21 to move.

[0083] In the brightness detection system, the host 23 is configured to adjust, through the mechanical drive device 24, the image acquisition device 22 to have a second acquisition distance from the display side of the display device 21. At the second acquisition distance, the second images displayed by the display modules are sequentially acquired through the image acquisition device 22; wherein, the second images include brightness detection information; the second acquisition distance is less than the first acquisition distance. At the second acquisition distance, paying attention to acquiring the second images including the brightness detection information of each display module can avoid the influence of the splicing position between the display modules on the acquired data.

[0084] As described above, the image acquisition device 22 includes a CCD camera. The resolution of the image acquisition device 22 is greater than that of the display device 21. In this way, based on the first image acquired by the image acquisition device 22, the splicing position between different display modules can be determined according to the display brightness difference in the first image. Moreover, based on the second image acquired by the image acquisition device 22, the display brightness of each sub-pixel in the corresponding display module can be accurately determined based on the partitioning of the second image.

[0085] The display device 21 has n display modules arranged in an array, where n is a positive integer greater than 1; the host 23 is configured to set the n display modules as the 1st display module to the nth display module in sequence based on the splicing position, and sequentially obtain the brightness detection information of the 1st display module to the nth display module; wherein, the ith display module is adjacent to the (i - 1)th display module in the row direction or column direction of the array, and i is a positive integer greater than 1 and not greater than n. Based on the above sorting method of the display modules, the host 23 can enable the mechanical driving device 24 to collect the brightness detection information of each display module one by one with the minimum translation distance.

[0086] Optionally, when obtaining the brightness detection information, the host 23 is configured to control the sub-pixels in the current display module to all perform image display based on the same gray scale to be tested. When collecting the brightness detection information of the same display module, controlling all its sub-pixels to perform image display based on the same gray scale to be tested facilitates the collection and calibration of the display brightness of different sub-pixels at the same gray scale, and improves the detection efficiency.

[0087] Optionally, when obtaining the brightness detection information, the host 23 is configured to control the sub-pixels in different display modules to all perform light emission display based on the same gray scale to be tested. When collecting the brightness detection information of each display module one by one, setting the sub-pixels in different display modules to all perform image display based on the same gray scale to be tested facilitates the collection and calibration of the display brightness of the sub-pixels in each display module at the same gray scale, and improves the detection efficiency.

[0088] In the brightness detection system, the host 23 is used to obtain brightness detection information according to the second image displayed by the display module, determine the actual display brightness of the sub-pixels in the corresponding display module based on the brightness detection information, determine the correction data signal of the sub-pixels in the display module based on the actual display brightness, and summarize the correction data signals of the sub-pixels in each display module to obtain the correction data signals of all sub-pixels in the display device. Since the brightness detection information of each display module is collected one by one, the brightness detection information of each display module does not affect each other. When processing the second image including the brightness detection information, partition processing is performed according to the resolution of the corresponding display module. After determining the display brightness of the sub-pixels in the display module based on the partition, the required correction data signal can be determined based on the display brightness of the sub-pixels. Finally, the correction data signals of the sub-pixels in different display modules are integrated according to the splicing position to achieve accurate acquisition of the display brightness of the sub-pixels in the entire display device and accurate compensation for the display uniformity of the sub-pixels.

[0089] In this specification, the various embodiments are described in a progressive, or parallel, or a combination of progressive and parallel manners. Each embodiment focuses on the differences from other embodiments. For the same or similar parts among the embodiments, reference can be made to each other. For the brightness detection system disclosed in the embodiments, since it corresponds to the brightness detection method disclosed in the embodiments, the description is relatively simple. For related parts, reference can be made to the corresponding parts of the brightness detection method.

[0090] It should be noted that in the description of this application, it should be understood that the description of the drawings and embodiments is illustrative rather than restrictive. The same reference numerals throughout the embodiments of the specification identify the same structures. Additionally, for the sake of understanding and ease of description, some layers, films, panels, regions, etc. may be exaggerated in thickness in the drawings. At the same time, it can be understood that when an element such as a layer, film, region, or substrate is referred to as being "on" another element, the element can be directly on the other element or there may be intermediate elements. Additionally, "on..." means positioning the element on or below another element, but essentially does not mean positioning on the upper side of another element according to the direction of gravity.

[0091] The orientation or positional relationship indicated by terms such as "upper", "lower", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of this application. When a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be intermediate components present.

[0092] It should also be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that an article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the article or device comprising the above elements.

[0093] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but rather to the broadest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for detecting the brightness of a display device, characterized in that, the display device includes: a plurality of spliced display modules, and the display module has a plurality of sub-pixels; the brightness detection method includes: determining the splicing position of the display module in the display device, including: adjusting the image acquisition device to have a first acquisition distance from the display side of the display device; at the first acquisition distance, acquiring a first image displayed by the display device through the image acquisition device; determining the splicing position of the display module in the display device according to the brightness information of the first image; wherein, when acquiring the first image, the display modules all perform image display so that the display device displays the first image; at the first acquisition distance, the display modules are all within the field of view of the image display device; based on the splicing position, obtaining the brightness detection information of the display module one by one, including: adjusting the image acquisition device to have a second acquisition distance from the display side of the display device, and the second acquisition distance is less than the first acquisition distance; at the second acquisition distance, acquiring the second images displayed by the display module one by one through the image acquisition device; wherein, the second image includes the brightness detection information; determining the display brightness of the sub-pixel based on the brightness detection information; wherein, the display brightness is used to determine the correction data signal of the sub-pixel.

2. The brightness detection method according to claim 1, characterized in that, when obtaining the brightness detection information, controlling the sub-pixels in the current display module to all perform image display based on the same gray scale to be tested.

3. The brightness detection method according to claim 2, characterized in that, when obtaining the brightness detection information, controlling the sub-pixels in different display modules to all perform light-emitting display based on the same gray scale to be tested.

4. The brightness detection method according to claim 1, characterized in that, the display device has n display modules arranged in an array, and n is a positive integer greater than 1; based on the splicing position, obtaining the brightness detection information of the display module one by one, including: based on the splicing position, setting the n display modules to be the 1st display module to the nth display module in sequence; wherein, the ith display module is adjacent to the (i - 1)th display module in the row direction or column direction of the array, and i is a positive integer greater than 1 and not greater than n; sequentially obtaining the brightness detection information of the 1st display module to the nth display module.

5. The brightness detection method according to claim 1, characterized in that, the method for obtaining the brightness detection information of the display module includes: acquiring a second image displayed by the display module, and the second image includes the brightness detection information; determining the correction data signal of the sub-pixel based on the brightness detection information, including: determining the display brightness of the sub-pixel corresponding to the display module based on the brightness detection information; determining the correction data signal of the sub-pixel in the display module based on the display brightness; Summarize the calibration data signals of the sub-pixels in each of the display modules to obtain the calibration data signals of all the sub-pixels in the display device.

6. A brightness detection system for the brightness detection method according to any one of claims 1-5, characterized in that it includes: A host, which is used to determine the splicing position of the display modules in the display device, based on the splicing position, sequentially obtain the brightness detection information of the display modules, and based on the brightness detection information, determine the display brightness of the sub-pixels; wherein, the display brightness is used to determine the calibration data signal of the sub-pixels.

7. The brightness detection system according to claim 6, characterized in that The brightness detection system includes: an image acquisition device and a mechanical drive device respectively communicatively connected to the host; The host is used to adjust, through the mechanical drive device, the image acquisition device to have a first acquisition distance from the display side of the display device. At the first acquisition distance, the first image displayed by the display device is acquired through the image acquisition device, and based on the brightness information of the first image, the splicing position of the display modules in the display device is determined; wherein, when acquiring the first image, all the display modules perform image display so that the display device displays the first image; at the first acquisition distance, all the display modules are within the field of view of the image display device.

8. The brightness detection system according to claim 7, characterized in that The host is used to adjust, through the mechanical drive device, the image acquisition device to have a second acquisition distance from the display side of the display device. At the second acquisition distance, the image acquisition device sequentially acquires the second images displayed by the display modules; wherein, the second image includes the brightness detection information; the second acquisition distance is less than the first acquisition distance.

9. The brightness detection system according to claim 7, characterized in that The image acquisition device includes a CCD camera.

10. The brightness detection system according to claim 6, characterized in that The display device has n display modules arranged in an array, where n is a positive integer greater than 1; The host is used to, based on the splicing position, set the n display modules to be the 1st display module to the nth display module in sequence, and sequentially obtain the brightness detection information of the 1st display module to the nth display module; wherein, the i-th display module is adjacent to the (i-1)-th display module in the row direction or column direction of the array, and i is a positive integer greater than 1 and not greater than n.

11. The brightness detection system according to claim 6, characterized in that When acquiring the brightness detection information, the host is used to control the sub-pixels in the current display module to all perform image display based on the same to-be-tested gray level.

12. The brightness detection system according to claim 11, characterized in that When acquiring the brightness detection information, the host is used to control the sub-pixels in different display modules to all perform light-emitting display based on the same to-be-tested gray level.

13. The brightness detection system according to claim 6, Characterized in that, the host is configured to obtain the brightness detection information according to the second image displayed by the display module, determine the actual display brightness of the sub-pixels in the display module based on the brightness detection information, determine the correction data signal of the sub-pixels in the display module based on the actual display brightness, and summarize the correction data signals of the sub-pixels in each display module to obtain the correction data signals of all sub-pixels in the display device.

Images