Display screen backlight offset detection method and related equipment

Abstract

The invention relates to a display screen backlight offset detection method and related equipment, and the method comprises the steps: obtaining a detection precision demand of a to-be-detected display screen, and taking a camera meeting the detection precision demand as a detection camera; the detection camera is used for shooting the display screen to be detected, a detection image is obtained, and the detection image comprises a screen area and a backlight source area corresponding to the display screen to be detected; acquiring information of an included angle between the screen area and the backlight area, and determining a deviation angle of a to-be-detected backlight of the to-be-detected display screen based on the information of the included angle; position information between the screen area and the backlight area is obtained, and the offset of the backlight to be detected is determined based on the position information; and obtaining a detection result of the to-be-detected backlight based on the deviation angle and the deviation amount. The problems that in the prior art, human eyes are prone to being affected by the environment, errors generated in the process of manually and visually detecting the backlight source of the display screen are large, and the accuracy and efficiency of the detection result are low are solved.

Description

Background Art

[0002] Backlight is a luminous light source, usually used on liquid crystal display screens. It is located on the back of the display and shines light onto the display screen through the transparent liquid crystal screen to increase the brightness and clarity of the screen. The liquid crystal display itself does not emit light, it displays graphics or the result of its light modulation of the light emitted by the backlight source. The luminous effect of the backlight source will directly affect the visual effect of the liquid crystal display module. The main functions of the backlight source are two points. One is to increase the brightness of the display. Because the liquid crystal panel itself cannot emit light, the image information must be transmitted through the illumination of the backlight source. Without a backlight source, the liquid crystal display will become very dim and difficult to recognize. The second is to improve the clarity of the display. The backlight source can improve the contrast of the display, making the black deeper and the white brighter, making the picture more vivid and clear.

[0003] LED backlight offset is one of the common problems of display screens. It is mainly due to the uneven distribution of backlight sources, which leads to higher or lower brightness in some areas. This kind of screen seriously affects the user experience of customers. It is necessary to detect the offset of the backlight source before leaving the factory to prevent the offset backlight source products from entering the market and affecting the quality of shipment. Screen backlight offset refers to the position dislocation or offset of the backlight module in the liquid crystal display screen relative to the display panel (screen), which will seriously affect the lighting effect of the screen and may cause display quality degradation and visual discomfort. In the prior art, the position of the backlight source needs to be detected before the display screen leaves the factory. The method of manual visual inspection is often used to directly observe the overall brightness and color uniformity of the liquid crystal display screen with the naked eye. If there are obvious differences in brightness or color in different screen areas, it may be a sign of backlight offset. However, the human eye is easily affected by the environment, which makes the error generated in the process of manual visual inspection of the display screen backlight source large, resulting in low accuracy and efficiency of the detection results. Summary of the invention

[0004] In order to overcome the problem in the prior art that the human eye is easily affected by the environment, resulting in large errors in the process of manual visual detection of display screen backlight sources, leading to low accuracy and efficiency of detection results, the present application provides a display screen backlight source offset detection method and related equipment.

[0005] In a first aspect, in order to solve the above technical problems, the present application provides a method for detecting an offset of a display backlight source, comprising:

[0006] Obtain the detection accuracy requirements of the display screen to be tested, and use a camera that meets the detection accuracy requirements as the detection camera;

[0007] Using a detection camera to shoot the display screen to be tested to obtain a detection image, the detection image includes a screen area and a backlight area corresponding to the display screen to be tested;

[0008] Acquire the angle information between the screen area and the backlight area, and determine the offset angle of the backlight to be tested of the display screen to be tested based on the angle information;

[0009] Acquire position information between the screen area and the backlight area, and determine the offset of the backlight to be measured based on the position information;

[0010] The detection result of the backlight source to be tested is obtained based on the offset angle and the offset amount.

[0011] In a second aspect, the present application also provides a display screen backlight source offset detection device, including a detection camera and a processor, the detection camera is used to photograph the display screen to be tested, and the processor is used to implement a display screen backlight source offset detection method.

[0012] In a third aspect, the present application also provides a display backlight source offset detection system, comprising:

[0013] An acquisition module is used to obtain the detection accuracy requirements of the display screen to be tested, and use a camera that meets the detection accuracy requirements as a detection camera;

[0014] A shooting module is used to shoot the display screen to be tested using a detection camera to obtain a detection image, where the detection image includes a screen area and a backlight area corresponding to the display screen to be tested;

[0015] A first determination module is used to obtain angle information between the screen area and the backlight area, and determine the offset angle of the backlight to be tested of the display screen to be tested based on the angle information;

[0016] A second determination module is used to obtain position information between the screen area and the backlight area, and determine the offset of the backlight to be measured based on the position information;

[0017] The obtaining module is used to obtain the detection result of the backlight source to be tested based on the offset angle and the offset amount.

[0018] In a fourth aspect, the present application also provides a computing device, including a memory, a processor, and a program stored in the memory and running on the processor, and when the processor executes the program, the steps of a method for detecting an offset of a display backlight source as described above are implemented.

[0019] In a fifth aspect, the present application also provides a computer-readable storage medium, in which instructions are stored. When the instructions are executed on a terminal device, the terminal device executes the steps of a method for detecting an offset of a display backlight source.

[0020] The beneficial effects of the present application are as follows: the display screen to be tested is photographed by using a detection camera that meets the detection accuracy requirements of the display screen to be tested to obtain a detection image. Then, based on the angle information between the screen area and the backlight area corresponding to the display screen to be tested in the detection image, the offset angle of the backlight source to be tested of the display screen to be tested is determined, and the offset of the backlight source to be tested is determined based on the position information between the screen area and the backlight area, and the detection result of the backlight source to be tested is obtained based on the offset angle and the offset, which can realize automatic detection of the offset of the backlight source to be tested, eliminate the error caused by manual visual detection, and improve the accuracy of the detection result. At the same time, the automated detection method of the present application also improves the detection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic flow chart of a method for detecting an offset of a display screen backlight source according to an exemplary embodiment of the present application;

[0022] Figure 2 This is a schematic diagram of four corner areas of a display screen to be tested in an exemplary embodiment of the present application;

[0023] Figure 3 The present invention is a schematic structural diagram of a display screen backlight source offset detection system according to an exemplary embodiment of the present application. DETAILED DESCRIPTION

[0024] The following examples are provided to further explain and supplement the present application and do not constitute any limitation to the present application.

[0025] A method for detecting an offset of a display screen backlight source and related equipment according to an embodiment of the present application will be described below in conjunction with the accompanying drawings.

[0026] An embodiment of the present application provides a method for detecting an offset of a display backlight source, which is applied to a terminal device. In the present application scheme, the terminal device is used as the execution subject to illustrate the present application scheme, and the terminal device is used to execute the steps of a method for detecting an offset of a display backlight source.

[0027] See also Figure 1 , Figure 1 A method for detecting the offset of a display screen backlight source is shown as an exemplary embodiment of the present application. Figure 1 As shown, the present application provides a method for detecting an offset of a display backlight source, comprising:

[0028] S11, obtaining the detection accuracy requirement of the display screen to be tested, and using a camera that meets the detection accuracy requirement as a detection camera;

[0029] S12, using a detection camera to shoot the display screen to be tested to obtain a detection image, where the detection image includes a screen area and a backlight area corresponding to the display screen to be tested;

[0030] S13, obtaining angle information between the screen area and the backlight area, and determining an offset angle of the backlight to be tested of the display screen to be tested based on the angle information;

[0031] S14, acquiring position information between the screen area and the backlight area, and determining the offset of the backlight to be measured based on the position information;

[0032] S15, obtaining a detection result of the backlight source to be tested based on the offset angle and the offset amount.

[0033] The offset detection method of a display screen backlight source of the present embodiment is to obtain a detection image by photographing the display screen to be tested using a detection camera that meets the detection accuracy requirements of the display screen to be tested. Then, based on the angle information between the screen area and the backlight area corresponding to the display screen to be tested in the detection image, the offset angle of the backlight source to be tested of the display screen to be tested is determined, and the offset of the backlight source to be tested is determined based on the position information between the screen area and the backlight area. The detection result of the backlight source to be tested is obtained based on the offset angle and the offset, which can realize automatic detection of the offset of the backlight source to be tested, eliminate the error caused by manual visual detection, and improve the accuracy of the detection result. At the same time, the automated detection method of the present embodiment also improves the detection efficiency.

[0034] Optionally, using a detection camera to photograph the display screen to be tested to obtain a detection image includes:

[0035] Using a detection camera to take pictures of the four corner areas of the display screen to be tested, respectively, to obtain four pictures;

[0036] Get the screen size of the display to be tested;

[0037] The four captured images are simulated and combined based on the screen size to obtain the detection image.

[0038] In this embodiment, since the current camera shooting accuracy and shooting range are limited, the detection camera is used to respectively shoot the four corner areas of the display screen to be tested, and four shooting images are obtained. Compared with the method of using the detection camera to shoot the display screen to be tested as a whole, the resolution of the shooting images obtained in this embodiment is higher. Then, based on the screen size of the display screen to be tested, the four shooting images are simulated and combined to obtain the detection image, so that the resolution of the detection image can be improved, so as to improve the detection accuracy of the subsequent detection of the backlight source to be tested, thereby improving the accuracy of the detection result of the backlight source to be tested.

[0039] See also Figure 2 , Figure 2 Schematic diagram of four corner areas of a display screen to be tested in an exemplary embodiment of the present application; Figure 2As shown, the display screen to be tested includes a backlight source to be tested and a screen, the AA area is the screen of the display screen to be tested, the backlight source to be tested of the display screen to be tested is below the screen, and the shadow areas at the four corners are all corner areas. The shadow areas at the four corners of the display screen to be tested are photographed by the detection camera to obtain four photographed images. Among them, the corner area includes the corners and part of the straight edges of the backlight source to be tested and the screen, and also includes the connection area between the backlight source to be tested and the screen.

[0040] Optionally, obtaining angle information between the screen area and the backlight area, and determining the offset angle of the backlight source to be tested of the display screen to be tested based on the angle information, includes:

[0041] Taking an edge on the screen area as a first reference edge, and obtaining a reference direction of the first reference edge on the screen area;

[0042] The edge on the backlight area that is closest to the first reference edge and has the same direction as the reference direction is used as the second reference edge;

[0043] The angle information between the first reference edge and the second reference edge is obtained, and the angle represented by the angle information is used as the offset angle of the backlight source to be tested of the display screen to be tested.

[0044] In this embodiment, an edge on the screen area is used as the first reference edge, and an edge on the backlight area that is closest to the first reference edge and is in the same direction as the reference direction is used as the second reference edge. When the backlight source to be tested of the display screen to be tested does not have an angle offset relative to the screen of the display screen to be tested, the first reference edge and the second reference edge are parallel, and when the backlight source to be tested has an angle offset relative to the screen, there is an angle between the first reference edge and the second reference edge. Therefore, the angle information between the first reference edge and the second reference edge is obtained, and the angle represented by the angle information is the offset angle of the backlight source to be tested, which facilitates the subsequent detection result of the backlight source to be tested based on the offset angle, so as to realize automatic detection of the backlight source to be tested.

[0045] Optionally, acquiring position information between the screen area and the backlight area, and determining the offset of the backlight to be measured based on the position information, includes:

[0046] Acquire a first center position of the screen area and a second center position of the backlight area;

[0047] Based on the first center position and the second center position, position information between the screen area and the backlight area is obtained, where the position information includes an offset direction from the first center position to the second center position, and an offset distance from the first center position to the second center position;

[0048] The offset of the backlight source to be measured is obtained based on the offset direction and the offset distance.

[0049] In this embodiment, when the backlight source to be tested of the display screen to be tested does not shift relative to the screen of the display screen to be tested except for the angle shift, the first center position of the screen area and the second center position of the backlight source area coincide with each other, while when the backlight source to be tested of the display screen to be tested shifts relative to the screen of the display screen to be tested except for the angle shift, the first center position of the screen area and the second center position of the backlight source area do not coincide with each other. Therefore, by obtaining the position information between the screen area and the backlight source area based on the first center position and the second center position, the offset direction from the first center position to the second center position and the offset distance from the first center position to the second center position can be understood, and the offset direction and offset distance are the offset of the backlight source to be tested, which facilitates the subsequent detection result of the backlight source to be tested based on the offset angle, so as to realize the automatic detection of the backlight source to be tested.

[0050] Optionally, acquiring position information between the screen area and the backlight area, and determining the offset of the backlight to be measured based on the position information, includes:

[0051] The center position of the backlight area is used as the rotation center, and the backlight area is deflected and adjusted using the offset angle to obtain the backlight area to be processed, so that the four sides of the backlight area to be processed and the screen area are parallel respectively;

[0052] Acquire position information between the screen area and the backlight area to be processed, the position information including the upper spacing distance, the lower spacing distance, the left spacing distance and the right spacing distance between the backlight area to be processed and the screen area;

[0053] The value obtained by dividing the difference between the upper spacing distance and the lower spacing distance by 2 is taken as the upper offset;

[0054] The value obtained by dividing the difference between the left spacing distance and the right spacing distance by 2 is used as the left offset;

[0055] The offset of the backlight source to be measured is obtained based on the upper offset and the lower offset.

[0056] In this embodiment, when the backlight source to be tested of the display screen to be tested does not deviate except for the angle offset relative to the screen of the display screen to be tested, the first center position of the screen area and the second center position of the backlight source area coincide with each other, and when the backlight source to be tested of the display screen to be tested deviates except for the angle offset relative to the screen of the display screen to be tested, the first center position of the screen area and the second center position of the backlight source area do not coincide with each other. Therefore, the center position of the backlight source area is used as the rotation center, and the backlight source area is deflected and adjusted by using the offset angle to obtain the backlight source area to be processed. Based on the upper spacing distance, lower spacing distance, left spacing distance and right spacing distance between the backlight source area to be processed and the screen area in the position information between the screen area and the backlight source area to be processed, the displacement of the backlight source to be tested relative to the screen in the upper, lower, left and right directions can be understood, and the upper offset and left offset can be obtained. Based on the upper offset and the lower offset, the offset of the backlight source to be tested is obtained, so as to facilitate the subsequent detection result of the backlight source to be tested based on the offset angle, so as to realize the automatic detection of the backlight source to be tested.

[0057] In this embodiment, when the upper offset is positive, it means that the backlight source to be tested is offset upward relative to the screen of the display screen to be tested, and when the upper offset is negative, it means that the backlight source to be tested is offset downward relative to the screen of the display screen to be tested. When the left offset is positive, it means that the backlight source to be tested is offset to the left relative to the screen of the display screen to be tested, and when the left offset is negative, it means that the backlight source to be tested is offset to the right relative to the screen of the display screen to be tested.

[0058] Optionally, obtaining a detection result of the backlight source to be tested based on the offset angle and the offset amount includes:

[0059] When the offset angle is within a preset qualified angle range, determining the first qualified result of the backlight source to be tested as qualified, otherwise, determining the first qualified result as unqualified;

[0060] When the offset is within a preset qualified offset range, determining the second qualified result of the backlight source to be tested as qualified, otherwise, determining the second qualified result as unqualified;

[0061] When both the first qualified result and the second qualified result are qualified, it is determined that the test result of the backlight source to be tested is qualified; otherwise, it is determined that the test result is unqualified.

[0062] In this embodiment, only when the offset angle is within the preset qualified angle range and the offset amount is within the preset qualified offset amount range, the luminous effect of the backlight source to be tested has the least impact on the visual effect of the screen. At this time, after the backlight source to be tested emits light and irradiates the screen, there will be no brightness difference and color difference that can be recognized by the human eye in the screen area, which can meet the visual needs of the user, and the detection result of the backlight source to be tested at this time is judged to be qualified. Otherwise, when the backlight source to be tested emits light, there will be brightness difference and / or color difference that can be recognized by the human eye in the screen area, which cannot meet the visual needs of the user, and the detection result of the backlight source to be tested at this time is judged to be unqualified, and the automatic detection of the backlight source to be tested of the display screen to be tested is completed.

[0063] In an exemplary embodiment, the preset qualified angle range is -0.08° to +0.08°. The preset qualified offset range includes a horizontal offset X and a vertical offset Y, the horizontal offset X is -0.075mm to +0.075mm, and the vertical offset Y is -0.075mm to +0.075mm.

[0064] An embodiment of the present application shows a display screen backlight source offset detection device, including a detection camera and a processor. The detection camera is used to photograph the display screen to be tested, and the processor is used to implement the above-mentioned display screen backlight source offset detection method.

[0065] In an exemplary embodiment, the device also includes a conveyor belt and a light source, the light source is used to simulate a high-contrast light environment, so that the display screen to be tested is in a high-contrast light environment for shooting and detection, and the conveyor belt is used to carry the display screen to be tested for movement, so that the display screen to be tested is moved to the shooting range of the detection camera for shooting. In this way, by placing the display screen to be tested on the conveyor belt, there is no need to move the display screen, and multiple display screens can be moved to the shooting range of the detection camera respectively, and the shooting is carried out in the high-contrast light environment created by the light source, thereby realizing the mobile shooting of multiple display screens, improving the automation of the detection device, reducing labor costs, and improving detection efficiency. At the same time, the detection image obtained by shooting in a high-contrast light environment can highlight the brightness difference and color difference on the screen, so that the qualified display screen after detection can meet the user's visual needs, thereby improving the user's experience of using the qualified display screen.

[0066] The method of this application directly determines the imaging quality of the image by the light source, selection and lighting scheme. Therefore, the light source is a very important part of the machine vision system, which directly affects the quality of the image and further affects the stability and other performance of the system. The light source is an infrared coaxial light source. An infrared coaxial light source is used to illuminate the front and back sides of the display screen to be tested. The high transmittance of the infrared light source is used to achieve high-contrast imaging of the screen area and backlight area of ​​the display screen to be tested. When the camera is capturing images, the coaxial light source on the other side can be used as a backlight to provide uniform illumination for the product without affecting the final measurement results.

[0067] The inspection camera is selected according to the inspection accuracy requirements. The inspection camera uses a domestic area array camera with a camera resolution of ≥12 million and a single pixel resolution of ≤0.001mm / px. For example, the camera body selects a 25M area array camera with an accuracy of 5um and a corresponding field of view of 25.6×25.6mm. This field of view can completely cover the rounded corners of the inspection corners of the display screen, while leaving straight edges for measurement; the camera lens uses a double-sided telecentric lens. Its main features are that under the telecentric viewing angle, there is no measurement error caused by the incident angle, almost zero distortion, consistent magnification, etc., which is very suitable for use as a measurement lens. A group of inspection cameras are arranged and stacked at the four corners of the front and back of the display screen to be tested, with a total of 8 inspection cameras, and each inspection camera shoots the corners and some straight edge areas. In this way, the display screen on the assembly line can detect the impact of the backlight source of the display screen on the screen without adjusting the front and back, further improving the degree of automation of the device. At the same time, the support mechanism of the inspection camera can achieve fine-tuning in the vertical direction and in the horizontal direction. The vertical fine-tuning is used to adjust the focus effect during shooting, and the horizontal fine-tuning is used to confirm that the image acquisition area is the corner area of ​​the display screen. The power supply of the inspection camera uses a camera power supply controller to realize a DC 24V voltage supply; when the display screen to be tested is moved by the conveyor belt to the shooting range of the inspection camera, the camera power supply controller is triggered to use a 12V DC voltage to control the inspection camera to shoot the four corner areas of the display screen to be tested, respectively, to obtain four captured images.

[0068] In an exemplary embodiment, a product QR code is provided on the display screen to be tested. When the detection device is used to shoot and detect the display screen to be tested, the product QR code is first identified so that the processor can implement a display screen backlight offset detection method to detect the display screen to be tested. The detection result obtained by the detection of the display screen to be tested is matched with the display screen to be tested. It is convenient to view the detection result by scanning the product QR code later, or to view the detection result in batches in the background, so that qualified and unqualified display screens can be stored in partitions, thereby improving the screening efficiency of qualified and unqualified products. When the detection result is qualified, it is stored as an OK sign, and when the detection result is unqualified, it is stored as an NG (NO GOOD) sign.

[0069] The offset detection method of the display screen backlight source based on machine vision of the present application is a high-precision, flexible, real-time, non-contact automatic detection technology, which provides a new development direction for defect detection. Automatic detection technology mainly revolves around machine vision, and can be widely developed and applied with its advantages of high efficiency, high precision, high reliability, non-contact and strong observability. The detection method of the present application has high detection reliability, high detection efficiency, high accuracy, and reduces the labor intensity of workers. The high detection reliability is reflected in that the offset of the backlight source of the display screen can be automatically detected for different models of display screens; the high detection efficiency is reflected in that the detection of a display screen can be completed within 1s, and the detection speed is several times that of manual detection. Machine vision detection can achieve long-term stable work, which greatly promotes the production efficiency of enterprises; the high accuracy is reflected in that the existing manual visual detection results are subjective, and individual differences, human eye fatigue, etc. will affect the detection results, while the machine vision detection of the present application is objective, and specific detection values ​​and results can be output, which is convenient and flexible to modify the detection standards. The present application adopts an automated detection method and detection device, which reduces manual participation, thereby alleviating the labor intensity of workers and helping enterprises save certain labor costs.

[0070] See also Figure 3 , Figure 3 An exemplary embodiment of the present application shows a display screen backlight source offset detection system, such as Figure 3 As shown, the present application provides a display screen backlight source offset detection system, comprising:

[0071] An acquisition module is used to obtain the detection accuracy requirements of the display screen to be tested, and use a camera that meets the detection accuracy requirements as a detection camera;

[0072] A shooting module is used to shoot the display screen to be tested using a detection camera to obtain a detection image, where the detection image includes a screen area and a backlight area corresponding to the display screen to be tested;

[0073] A first determination module is used to obtain angle information between the screen area and the backlight area, and determine the offset angle of the backlight to be tested of the display screen to be tested based on the angle information;

[0074] A second determination module is used to obtain position information between the screen area and the backlight area, and determine the offset of the backlight to be measured based on the position information;

[0075] The obtaining module is used to obtain the detection result of the backlight source to be tested based on the offset angle and the offset amount.

[0076] The offset detection system of a display screen backlight source of the present embodiment uses a detection camera that meets the detection accuracy requirements of the display screen to be tested obtained by the acquisition module to shoot the display screen to be tested in the shooting module to obtain a detection image. Then, the first determination module is used to determine the offset angle of the backlight source to be tested of the display screen to be tested based on the angle information between the screen area and the backlight source area corresponding to the display screen to be tested in the detection image, and the second determination module is used to determine the offset of the backlight source to be tested based on the position information between the screen area and the backlight source area, and the detection result of the backlight source to be tested is obtained by the acquisition module based on the offset angle and the offset, which can realize automatic detection of the offset of the backlight source to be tested, eliminate the error caused by manual visual detection, and improve the accuracy of the detection result. At the same time, the automated detection method of the present embodiment also improves the detection efficiency.

[0077] Optionally, the shooting module is specifically used to:

[0078] Using a detection camera to take pictures of the four corner areas of the display screen to be tested, respectively, to obtain four pictures;

[0079] Get the screen size of the display to be tested;

[0080] The four captured images are simulated and combined based on the screen size to obtain the detection image.

[0081] Optionally, the first determining module is specifically configured to:

[0082] Taking an edge on the screen area as a first reference edge, and obtaining a reference direction of the first reference edge on the screen area;

[0083] The edge on the backlight area that is closest to the first reference edge and has the same direction as the reference direction is used as the second reference edge;

[0084] The angle information between the first reference edge and the second reference edge is obtained, and the angle represented by the angle information is used as the offset angle of the backlight source to be tested of the display screen to be tested.

[0085] Optionally, the second determining module is specifically configured to:

[0086] Acquire a first center position of the screen area and a second center position of the backlight area;

[0087] Based on the first center position and the second center position, position information between the screen area and the backlight area is obtained, where the position information includes an offset direction from the first center position to the second center position, and an offset distance from the first center position to the second center position;

[0088] The offset of the backlight source to be measured is obtained based on the offset direction and the offset distance.

[0089] Optionally, the second determining module is specifically configured to:

[0090] The center position of the backlight area is used as the rotation center, and the backlight area is deflected and adjusted using the offset angle to obtain the backlight area to be processed, so that the four sides of the backlight area to be processed and the screen area are parallel respectively;

[0091] Acquire position information between the screen area and the backlight area to be processed, the position information including the upper spacing distance, the lower spacing distance, the left spacing distance and the right spacing distance between the backlight area to be processed and the screen area;

[0092] The value obtained by dividing the difference between the upper spacing distance and the lower spacing distance by 2 is taken as the upper offset;

[0093] The value obtained by dividing the difference between the left spacing distance and the right spacing distance by 2 is used as the left offset;

[0094] The offset of the backlight source to be measured is obtained based on the upper offset and the lower offset.

[0095] Optionally, get the module, specifically for:

[0096] When the offset angle is within a preset qualified angle range, determining the first qualified result of the backlight source to be tested as qualified, otherwise, determining the first qualified result as unqualified;

[0097] When the offset is within a preset qualified offset range, determining the second qualified result of the backlight source to be tested as qualified, otherwise, determining the second qualified result as unqualified;

[0098] When both the first qualified result and the second qualified result are qualified, it is determined that the test result of the backlight source to be tested is qualified; otherwise, it is determined that the test result is unqualified.

[0099] It should be noted that the offset detection system for a display screen backlight source provided in the above embodiment and the offset detection method for a display screen backlight source provided in the above embodiment belong to the same concept, wherein the specific manner in which each module and unit performs operations has been described in detail in the method embodiment and will not be repeated here. In actual applications, the offset detection system for a display screen backlight source provided in the above embodiment can allocate the above functions to different functional modules as needed, that is, divide the internal structure of the system into different functional modules to complete all or part of the functions described above, and this is not limited here.

[0100] A computing device according to an embodiment of the present application includes a memory, a processor, and a program stored in the memory and running on the processor. When the processor executes the program, some or all steps of the above-mentioned method for detecting an offset of a display backlight source are implemented.

[0101] Among them, the computing device can be a computer, and correspondingly, its program is computer software. The above-mentioned parameters and steps in a computing device of the present application can refer to the parameters and steps in an embodiment of an offset detection method for a display backlight source in the above text, and will not be repeated here.

[0102] In an embodiment of the present application, a computer-readable storage medium is provided, in which instructions are stored. When the instructions are executed, the steps of the above-mentioned method for detecting an offset of a display screen backlight source are executed.

[0103] The computer-readable storage medium may be a transient computer-readable storage medium or a non-transitory computer-readable storage medium.

[0104] The technical solution of the embodiment of the present disclosure can be embodied in the form of a software product, which is stored in a storage medium and includes one or more instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method of the embodiment of the present disclosure. The aforementioned computer-readable storage medium may be a non-transitory computer-readable storage medium, including: a USB flash drive, a mobile hard disk, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a disk or an optical disk, and other media that can store program codes, or a transient computer-readable storage medium.

[0105] The flowchart and block diagram in the accompanying drawings illustrate the possible architecture, functions and operations of the system, method and computer program product according to various embodiments of the present application. Wherein, each box in the flowchart or block diagram can represent a module, a program segment, or a part of the code, and the above-mentioned module, program segment, or a part of the code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in a different order from the order marked in the accompanying drawings. For example, two boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram or flowchart, and the combination of boxes in the block diagram or flowchart can be implemented with a dedicated hardware-based system that performs a specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0106] Those skilled in the art know that the present application can be implemented as a system, method or computer program product. Therefore, the present disclosure can be specifically implemented in the following forms, namely: it can be complete hardware, it can be complete software (including firmware, resident software, microcode, etc.), or it can be a combination of hardware and software, generally referred to as "module" or "system" herein. In addition, in some embodiments, the present application can also be implemented in the form of a computer program product in one or more computer-readable media, and the computer-readable medium contains computer-readable program code. Computer-readable storage media can be, for example, but not limited to - electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices or devices, or any combination of the above.

[0107] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0108] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A method for detecting the offset of a display backlight source, characterized in that: include: Obtain the detection accuracy requirements of the display screen to be tested, and use a camera that meets the detection accuracy requirements as a detection camera; Using the detection camera to photograph the display screen to be tested to obtain a detection image, wherein the detection image includes a screen area and a backlight area corresponding to the display screen to be tested; Acquire angle information between the screen area and the backlight area, and determine an offset angle of the backlight source to be tested of the display screen to be tested based on the angle information; Acquire position information between the screen area and the backlight area, and determine the offset of the backlight to be measured based on the position information; A detection result of the backlight source to be tested is obtained based on the offset angle and the offset amount.

2. The method according to claim 1, characterized in that The method of photographing the display screen to be tested by using the detection camera to obtain a detection image includes: Using the detection camera to photograph four corner areas of the display screen to be tested respectively to obtain four photographed images; Obtaining the screen size of the display screen to be tested; The four captured images are simulated and combined based on the screen size to obtain a detection image.

3. The method according to claim 1, characterized in that The step of acquiring the angle information between the screen area and the backlight area, and determining the offset angle of the backlight source to be tested of the display screen to be tested based on the angle information, comprises: Taking an edge on the screen area as a first reference edge, and obtaining a reference direction of the first reference edge on the screen area; The edge of the backlight area which is closest to the first reference edge and has the same direction as the reference direction is used as the second reference edge; The angle information between the first reference edge and the second reference edge is obtained, and the angle represented by the angle information is used as the offset angle of the backlight source to be tested of the display screen to be tested.

4. The method according to claim 1, characterized in that: The acquiring the position information between the screen area and the backlight area, and determining the offset of the backlight to be measured based on the position information, comprises: Acquire a first center position of the screen area and a second center position of the backlight area; Obtaining position information between the screen area and the backlight area based on the first center position and the second center position, the position information including an offset direction from the first center position to the second center position, and an offset distance from the first center position to the second center position; The offset amount of the backlight source to be measured is obtained based on the offset direction and the offset distance.

5. The method according to claim 1, characterized in that The acquiring the position information between the screen area and the backlight area, and determining the offset of the backlight to be measured based on the position information, comprises: Taking the center position of the backlight area as the rotation center, and using the offset angle to adjust the backlight area, to obtain a backlight area to be processed, so that the four sides of the backlight area to be processed and the screen area are respectively parallel; Acquire position information between the screen area and the backlight area to be processed, wherein the position information includes an upper spacing distance, a lower spacing distance, a left spacing distance, and a right spacing distance between the backlight area to be processed and the screen area; The value obtained by dividing the difference between the upper spacing distance and the lower spacing distance by 2 is used as the upper offset; The value obtained by dividing the difference between the left spacing distance and the right spacing distance by 2 is used as the left offset; The offset of the backlight source to be measured is obtained based on the upper offset and the lower offset.

6. The method according to any one of claims 1 to 5, characterized in that: The obtaining the detection result of the backlight source to be tested based on the offset angle and the offset amount includes: When the offset angle is within a preset qualified angle range, determining that the first qualified result of the backlight source to be tested is qualified, otherwise, determining that the first qualified result is unqualified; When the offset is within a preset qualified offset range, determining the second qualified result of the backlight source to be tested as qualified, otherwise, determining the second qualified result as unqualified; When both the first qualified result and the second qualified result are qualified, it is determined that the detection result of the backlight source to be tested is qualified; otherwise, it is determined that the detection result is unqualified.

7. A display screen backlight source offset detection device, characterized in that: It comprises a detection camera and a processor, wherein the detection camera is used to photograph the display screen to be tested, and the processor is used to implement the offset detection method of the display screen backlight source as described in any one of claims 1 to 6.

8. A display screen backlight source offset detection system, characterized in that: include: An acquisition module, used to acquire the detection accuracy requirement of the display screen to be tested, and use a camera that meets the detection accuracy requirement as a detection camera; A shooting module, used for shooting the display screen to be tested by using the detection camera to obtain a detection image, wherein the detection image includes a screen area and a backlight area corresponding to the display screen to be tested; A first determination module is used to obtain angle information between the screen area and the backlight area, and determine an offset angle of the backlight source to be tested of the display screen to be tested based on the angle information; A second determination module is used to obtain position information between the screen area and the backlight area, and determine the offset of the backlight to be measured based on the position information; An obtaining module is used to obtain a detection result of the backlight source to be tested based on the offset angle and the offset amount.

9. A computing device comprising a memory, a processor, and a program stored in the memory and running on the processor, characterized in that: When the processor executes the program, the steps of the method for detecting the offset of a display screen backlight source as described in any one of claims 1 to 6 are implemented.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores instructions, and when the instructions are executed on a terminal device, the terminal device executes the steps of a method for detecting an offset of a display screen backlight source as described in any one of claims 1 to 6.

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