Light transmission detection method and device

Abstract

The invention provides a light transmission detection method and device. The light transmission detection method comprises the following steps: acquiring a brightness image of light emitted by a light source and a light transmission image of the light source after penetrating through a to-be-detected product; obtaining a first brightness value of a display area where the brightness image is located and a second brightness value of a display area where the light-transmitting image is located; and determining the light transmittance of the to-be-detected product based on the first brightness value and the second brightness value. The brightness image and the light-transmitting image of the to-be-tested product are obtained and displayed, then the brightness of the display area where the brightness image is located and the brightness of the display area where the light-transmitting image is located are calculated respectively, and then the light transmittance of the to-be-tested product is calculated according to the brightness difference between the brightness image and the light-transmitting image. The light transmission detection operation is convenient, the device is suitable for brightness detection and light transmission detection of products of various sizes, the whole product does not need to be damaged, the flexibility and adaptability are high, and the test efficiency and accuracy are high.

Description

Technical Field

[0001] The present application relates to a vehicle, and in particular to a light transmission detection method and device. Background Art

[0002] At present, the inspection of light-transmitting products usually requires sending samples to the laboratory for inspection. However, the inspection equipment has certain requirements for the size and light-transmitting area of ​​light-transmitting products, and light-transmitting products that do not meet the requirements cannot be directly inspected. For example, light-transmitting products with larger sizes or smaller light-transmitting areas may not be able to be directly inspected using inspection equipment. It is necessary to cut the light-transmitting products or make separate test samples that meet the requirements for testing. Cutting light-transmitting products will damage the light-transmitting products. Making separate test samples that meet the requirements will result in differences in the parameters of the test samples due to different manufacturing processes, and the test results obtained will be inaccurate. Summary of the invention

[0003] In order to solve the problems in the prior art, the present application provides a light transmittance detection method and device to achieve brightness detection and light transmittance detection of products of various sizes.

[0004] The present application provides a light transmission detection method, which comprises: Acquire a brightness image of light emitted by a light source and a light transmission image after the light source passes through the product to be tested; Acquire a first brightness value of a display area where the brightness image is located and a second brightness value of a display area where the light-transmitting image is located; The light transmittance of the product to be tested is determined based on the first brightness value and the second brightness value.

[0005] In one embodiment, obtaining a first brightness value of a display area where the brightness image is located and a second brightness value of a display area where the light-transmitting image is located includes: Acquire a first driving power of a display area where the brightness image is located and a second driving power of a display area where the light-transmitting image is located; Determining the first brightness value based on the first driving power and the first rated power; The second brightness value is determined based on the second driving power and the second rated power.

[0006] In one embodiment, the calculating the first brightness value and the second brightness value to obtain the light transmittance of the product to be tested includes: Obtaining the actual brightness value and actual driving power of each display area; Determine a first correction coefficient for converting power of each display area into brightness based on a ratio of the actual brightness value of each display area to the actual driving power; Acquire a first driving power of a display area where the brightness image is located and a second driving power of a display area where the light-transmitting image is located; determining the first brightness value based on the first driving power, the first calibration power, and a first correction coefficient of the display area where the brightness image is located; The second brightness value is determined based on the second driving power, the second calibration power, and a first correction coefficient of the display area where the light-transmitting image is located.

[0007] In one embodiment, the calculating the first brightness value and the second brightness value to obtain the light transmittance of the product to be tested includes: Based on the ratio of the second brightness value to the first brightness value, the light transmittance of the product to be tested is determined.

[0008] In one embodiment, the calculating the first brightness value and the second brightness value to obtain the light transmittance of the product to be tested includes: determining a first light transmittance based on a ratio of the second brightness value to the first brightness value; Obtaining the actual light transmittance of the product to be tested; Calculating the ratio of the first light transmittance to the actual light transmittance to obtain a converted light transmittance correction coefficient; The first brightness value, the second brightness value and the light transmittance correction coefficient are calculated to obtain the light transmittance of the product to be tested.

[0009] In one embodiment, after obtaining the first brightness value of the display area where the brightness image is located and the second brightness value of the display area where the light transmission image is located, the light transmission detection method further includes: Acquire image information of the brightness image and image information of the light transmission image; controlling the first display area to display the brightness image based on the image information of the brightness image; The second display area is controlled to display the light-transmitting image based on the image information of the light-transmitting image.

[0010] In one embodiment, before acquiring the first brightness value of the display area where the brightness image is located and the second brightness value of the display area where the light transmission image is located, the light transmission detection method further includes: Adjust the brightness image based on the position of the luminous area or the highest brightness point in the brightness image; The light-transmitting image is adjusted based on the position of the light-emitting area of ​​the light-transmitting image or the point with the highest brightness.

[0011] The present application also proposes a light transmission detection system, the light transmission detection system comprising: A light source, used to emit light to the product to be tested; An image acquisition device, used to acquire a brightness image of the light emitted by the light source and a light transmission image of the light emitted by the light source after passing through the product to be tested; A display device, comprising a display area for displaying the brightness image and / or the light-transmitting image; the display device is further used to obtain a first brightness value of the display area where the brightness image is located and a second brightness value of the display area where the light-transmitting image is located; A control device is used to determine the light transmittance of the product to be tested based on the first brightness value and the second brightness value.

[0012] The application also proposes that the computer device includes a memory and a processor; The memory is coupled to the processor; The memory is used to store program instructions; The processor is used to read the program instructions stored in the memory to implement the above-mentioned light transmission detection method.

[0013] The present application also proposes that the computer-readable storage medium stores computer-readable instructions, and the computer-readable instructions implement the above-mentioned light transmission detection method when executed by the processor.

[0014] This application obtains the brightness image and light transmission image of the product to be tested, displays the brightness image and the light transmission image, and then respectively calculates the brightness of the display area where the brightness image is located and the brightness of the display area where the light transmission image is located, and then calculates the light transmittance of the product to be tested based on the brightness difference between the brightness image and the light transmission image. The light transmission detection is easy to operate, suitable for brightness detection and light transmission detection of products of various sizes, does not need to destroy the overall product, has strong flexibility and adaptability, and has high test efficiency and accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of an embodiment of a light transmission detection system of the present application.

[0016] Figure 2 This is a schematic diagram of an application scenario of an embodiment of a light transmission detection system of the present application.

[0017] Figure 3 It is a distribution diagram of another embodiment of the display device of the present application.

[0018] Figure 4 This is a flow chart of an embodiment of the light transmission detection method of the present application.

[0019] Figure 5 This is a flow chart of an embodiment of determining brightness value of the present application.

[0020] Figure 6This is a flow chart of another embodiment of determining brightness value of the present application.

[0021] Figure 7 This is a flow chart of an embodiment of determining light transmittance of the present application.

[0022] Figure 8 This is a flow chart of another embodiment of determining light transmittance of the present application.

[0023] Fig. 9 This is a flow chart of another embodiment of the light transmission detection method of the present application.

[0024] Fig.10 This is a flow chart of another embodiment of the light transmission detection method of the present application.

[0025] Main component symbols Light transmission detection system 100 Light source 110 Image acquisition device 120 Display device 130 Control device 140 The first display area 131 Second display area 132 The following specific implementation methods will further illustrate the present application in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0026] The following description will refer to the accompanying drawings to more fully describe the content of the present application. Shown in the accompanying drawings are exemplary embodiments of the present application. However, the present application can be implemented in many different forms and should not be construed as being limited to the exemplary embodiments set forth herein. These exemplary embodiments are provided to make the present application thorough and complete, and to fully convey the scope of the present application to those skilled in the art. Similar reference numerals represent identical or similar components.

[0027] The terms used herein are only used for the purpose of describing specific exemplary embodiments and are not intended to limit the present application. As used herein, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to also include the plural forms. In addition, when used herein, "including" and / or "comprising" and / or "having", integers, steps, operations, components and / or components, but do not exclude the existence or addition of one or more other features, regions, integers, steps, operations, components and / or groups thereof.

[0028] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by those of ordinary skill in the art to which this application belongs. In addition, unless explicitly defined herein, terms such as those defined in general dictionaries should be interpreted as having a meaning consistent with their meaning in the relevant technology and the content of this application, and will not be interpreted as an idealized or overly formal meaning.

[0029] The following will describe exemplary embodiments in conjunction with the accompanying drawings. It should be noted that the components depicted in the reference drawings are not necessarily shown to scale; and the same or similar components will be given the same or similar reference numerals or similar technical terms.

[0030] Reference Figure 1~Figure 3 , the present application proposes a light transmittance detection system 100, the light transmittance detection system 100 includes a light source 110, an image acquisition device 120, a display device 130 and a control device 140. The light source 110 is used to emit light to the product to be tested. The image acquisition device 120 is used to obtain a brightness image of the light emitted by the light source 110 and a light transmittance image after the light emitted by the light source 110 passes through the product to be tested. The display device 130 includes a display area for displaying the brightness image and / or the light transmittance image; the display device 130 is also used to obtain a first brightness of the display area where the brightness image is located and a second brightness of the display area where the light transmittance image is located. The control device 140 is used to determine the light transmittance of the product to be tested based on the first brightness and the second brightness.

[0031] In this embodiment, the light source 110 may be a device that can emit light, such as an LED lamp, a flashlight, or a candle. The image acquisition device 120 may be a device that can capture images, such as a camera or a webcam. Figure 2 According to the actual application, a certain distance is set between the image acquisition device 120 and the light source 110. When the product to be tested is not placed, the image acquisition device 120 photographs the light source 110 to obtain a brightness image. After the product to be tested is placed between the image acquisition device 120 and the light source 110, the image acquisition device 120 photographs the product to be tested to obtain a light transmission image.

[0032] The image acquisition device 120 can transmit the brightness image and the light transmission image to the display device 130 by wired or wireless transmission, and display them on the display device 130. The display device 130 may include a display screen and at least two display controllers. A display screen includes at least two display areas, and each display controller is used to control a display area to display an image. In this way, a brightness image and a light transmission image with different brightness can be displayed simultaneously on a display screen. Alternatively, the display device 130 includes at least two display screens, each display screen is a display area, and the brightness image and the light transmission image can be displayed on different display screens respectively.

[0033] When the display screen displays a higher brightness picture, in order to maintain the required brightness level, a larger power is required to drive the backlight, thereby generating brighter light, so that the display screen can display a higher brightness image. Therefore, the brightness value of the brightness image can be obtained by obtaining the first brightness value of the display area where the brightness image is located, and the second brightness value of the display area where the light-transmitting image is located can be obtained as the brightness value of the light-transmitting image. The control device 140 can determine the light transmittance of the product to be tested by calculating the first brightness value and the second brightness value. Among them, the control device 140 can be implemented by a chip with control function such as a microprocessor, FPGA (Field Programmable Gate Array). The control device 140 can also be integrated in the display device 130.

[0034] The light transmission detection system 100 of this embodiment collects brightness images and light transmission images through the image acquisition device 120, and can enlarge or reduce the photographed object through zooming. The collection process is not limited by the product size and can be applied to light transmission detection of products of various sizes to be tested.

[0035] For example, the light transmission detection system 100 of this embodiment can be applied to the light transmission detection of all or part of the light transmission parts on the vehicle. With the development of automobile intelligence, the use of high and low light prompts for human-computer interaction between drivers and pedestrians during driving can no longer meet future market needs, and more complex bumper assemblies are used in automobile production. At present, bumper assemblies that are fully or partially light-transmitting and have customizable light-transmitting patterns / logos are favored by many consumers as measures to improve the appearance of the car and improve human-computer interaction during driving. Light-transmitting bumper assemblies need to be tested for light transmittance during the development process, and the light transmittance of the illuminated bumper assembly also needs to be tested after assembly.

[0036] However, the samples need to be sent to the laboratory for testing for transmittance and brightness testing. And the testing equipment has certain requirements for the size of the light-transmitting area of ​​the product to be tested. For example, in the design of a certain car model, the light-transmitting aperture of the bumper assembly is 0.3mm, and the size of the light-transmitting equipment detection area requires that the light-transmitting aperture of the product to be tested is not less than 21mm, which makes it impossible to test the bumper assembly of this model. It is necessary to make a separate bumper assembly with a light-transmitting aperture greater than 21mm for testing. However, different processes cause changes in the thickness of the substrate, and there is a certain deviation between the test results and the actual process, and there are also large differences in the detected data. In addition, for other light-transmitting components that meet the light-transmitting aperture requirements, the corresponding light-transmitting parts may need to be cut out for testing due to their large size. If multiple areas are tested, sampling is required at multiple locations, which will damage the product.

[0037] In order to solve the above problems, the light transmission detection system 100 of this embodiment can be used to detect the light transmission parts of the vehicle. The brightness image and the light transmission image are collected by the image acquisition device 120, and the brightness image and the light transmission image can be collected for light transmission parts with different light transmission apertures and different sizes. For large-sized light transmission parts, overall sampling can be carried out, and for local light transmission parts on the vehicle, local sampling can be carried out through the image acquisition device 120, which is not limited by product characteristics, reducing the cost of separate process processing of the product to meet the detection size requirements in the past, and there is no need to destroy the vehicle for detection, and multiple detections can be carried out. The problem of equipment limitation of light transmission part detection is solved, and the convenience of detection is improved. There is no designated light transmission part for the light source 110 for light transmission detection, and the light source 110 can be sampled by light-emitting equipment such as flashlights, further improving basic convenience.

[0038] The captured image can be viewed on the display device 130. The display device 130 calculates the brightness by real-time capturing the driving current and driving voltage of the display area where the image is located, and then calculates the transmittance of the product to be tested based on the brightness difference between the brightness image and the transmittance image through the control device 140.

[0039] The present application obtains the brightness image and the light transmission image of the product to be tested through the image acquisition device 120, displays the brightness image and the light transmission image through the display device 130, and respectively calculates the brightness of the display area where the brightness image is located and the brightness of the display area where the light transmission image is located, and calculates the light transmittance of the product to be tested according to the brightness difference between the brightness image and the light transmission image through the control device 140. The light transmission detection is easy to operate, suitable for brightness detection and light transmission detection of products of various sizes, does not need to destroy the overall product, has strong flexibility and adaptability, and has high test efficiency and accuracy. In one embodiment, the display device 130 is also used to obtain a first driving power of a display area where the brightness image is located and a second driving power of a display area where the light-transmitting image is located, and to determine the first brightness value based on the first driving power and the first calibrated power, and to determine the second brightness value based on the second driving power and the second calibrated power.

[0040] In this embodiment, the brightness of the display area is proportional to the driving power. Therefore, the brightness of the display area can be determined according to the driving power of the display area.

[0041] Specifically, the display device 130 further includes a voltage detection circuit, a current detection circuit, and a control circuit. The number of the voltage detection circuits and the current detection circuits is consistent with the number of display areas. Each voltage detection circuit is used to detect the driving voltage of one of the display areas. Each current detection circuit is used to detect the driving current of one of the display areas. The control circuit is used to calculate the product of the driving voltage and the driving current of the corresponding display area to obtain the driving power of the display area.

[0042] After that, the control circuit calculates the driving power of the display area and the calibrated driving power to obtain the brightness value of the display area: N=P1 / P0, where N is the brightness value of the display area, and P1 is the driving power of the display area, which can be determined according to the driving current A and driving voltage V of the display area actually detected: P1=A×V. P0 is the calibrated driving power of the display area, which can be determined according to the calibrated brightness current A0 and calibrated brightness voltage V0 of the display area: P0=A1×V0. The control circuit can determine the first brightness value N1 of the brightness image and the second brightness value N2 of the light-transmitting image through the above calculation.

[0043] In one embodiment, the display device 130 is also used to obtain an actual brightness value and an actual driving power of each display area, determine a first correction coefficient for converting the power into brightness of each display area based on a ratio of the actual brightness value to the actual driving power of each display area, obtain a first driving power of the display area where the brightness image is located and a second driving power of the display area where the light-transmitting image is located, and determine the first brightness value based on the first driving power, the first rated power and the first correction coefficient of the display area where the brightness image is located, and determine the second brightness value based on the second driving power, the second rated power and the first correction coefficient of the display area where the light-transmitting image is located.

[0044] In this embodiment, the control circuit obtains the brightness value of the display area by calculating the driving power of the display area and calibrating the driving power: N=(P1 / P0)×p, where p is the first correction coefficient for power conversion to brightness. The control circuit can determine the first brightness value N1 of the brightness image and the second brightness value N2 of the light-transmitting image through the above calculation. When the driving power drives the backlight to emit a certain brightness of light, there is a certain loss due to circuit characteristics, environmental influences, measurement errors, etc. Therefore, adding the first correction coefficient p for power conversion to brightness into the calculation can obtain a more accurate brightness value. Among them, the first correction coefficient p for power conversion to brightness can be determined by testing the corresponding display area using other pictures before testing.

[0045] In one embodiment, the control device 140 is further configured to determine the light transmittance of the product to be tested based on the ratio of the second brightness value to the first brightness value: T=N2 / N1=((A2×V2) / (A×V)×p) / ((A1×V1) / (A×V)×p), where T is the transmittance of the product to be tested, A2 is the driving current of the display area where the light-transmitting image is located, V2 is the driving voltage of the display area where the light-transmitting image is located, A1 is the driving current of the display area where the brightness image is located, and V1 is the driving voltage of the display area where the brightness image is located.

[0046] In one embodiment, the control device 140 is further used to determine the first light transmittance based on the ratio of the second brightness value to the first brightness value; and obtain the actual light transmittance of the product to be tested, and calculate the ratio of the first light transmittance to the actual light transmittance to obtain a converted light transmittance correction coefficient. The control device 140 is also used to calculate the first brightness value, the second brightness value and the converted light transmittance correction coefficient to obtain the light transmittance of the product to be tested: T=(N2 / N1)×n, where n is the transmittance correction coefficient.

[0047] In this embodiment, due to the influence of measurement error, characteristics of the product to be tested, etc., the transmittance obtained by directly calculating N2 / N1 may have deviations. Therefore, adding the transmittance correction coefficient to the calculation can obtain a more accurate transmittance. Among them, the actual transmittance of the product to be tested can be obtained by the transmittance test method in the prior art.

[0048] Reference Figure 3 In one embodiment, the display device 130 is also used to obtain image information of the brightness image and image information of the light-transmitting image, and control the first display area 131 to display the brightness image based on the image information of the brightness image, and control the second display area 132 to display the light-transmitting image based on the image information of the light-transmitting image.

[0049] In this embodiment, after the image acquisition device 120 collects the brightness image and the light transmission image for sampling, the image information of the brightness image and the light transmission image is imported into the display device 130. After the graphics processor in the display device 130 processes the imported image information, the display screen of the display device 130 is controlled to display it. Since the brightness of the brightness image and the light transmission image are different, the display screen is stimulated to have a brightness difference between the display area where the brightness image is located and the display area where the light transmission image is located, so that the brightness of the brightness image and the light transmission image can be determined by respectively detecting the brightness of the display area where the brightness image is located and the display area where the light transmission image is located.

[0050] In one embodiment, the display device 130 is further configured to adjust the brightness image based on the position of the luminous area or the highest brightness point in the brightness image. Adjust the light-transmitting image based on the position of the luminous area or the highest brightness point in the light-transmitting image.

[0051] In this embodiment, there may be luminous areas and darker areas in the brightness image or the light transmission image. To facilitate the measurement of the image brightness, the image may be cropped to retain the luminous area and remove the darker area. Alternatively, there may be multiple luminous areas in the brightness image or the light transmission image, and one of the luminous areas may be selected to be retained and the other luminous areas may be removed.

[0052] In addition, the highest brightness point may be used as the center point of the image, and the brightness image and the light transmission image may be adjusted to unify the brightness detection areas of the brightness image and the light transmission image. Reference Figure 4 The present application also proposes a light transmission detection method, which comprises: S1: Acquire a brightness image of the light emitted by the light source 110 and a light transmission image of the light source 110 after passing through the product to be tested.

[0053] S2: Acquire a first brightness value of a display area where the brightness image is located and a second brightness value of a display area where the light-transmitting image is located.

[0054] S3: Determine the light transmittance of the product to be tested based on the first brightness value and the second brightness value.

[0055] In this embodiment, the light source 110 can be a device that can emit light, such as an LED lamp, a flashlight, or a candle. The brightness image and the light transmission image after the light source 110 passes through the product to be tested can be obtained by taking pictures with a camera, a camera, or other device that can take pictures. For example, a certain interval is set between the camera and the light source 110 according to the actual application. When the product to be tested is not placed, the image acquisition device 120 takes pictures of the light source 110 to obtain a brightness image. After the product to be tested is placed between the image acquisition device 120 and the light source 110, the image acquisition device 120 takes pictures of the product to be tested to obtain a light transmission image.

[0056] The brightness image and the light-transmitting image can be transmitted to the display device 130 by wired or wireless transmission, and displayed on the display device 130. The display device 130 may include a display screen and at least two display controllers. A display screen includes at least two display areas, and each display controller is used to control a display area to display an image. In this way, a brightness image and a light-transmitting image with different brightness can be displayed simultaneously on a display screen. Alternatively, the display device 130 includes at least two display screens, each display screen is a display area, and the brightness image and the light-transmitting image can be displayed on different display screens respectively.

[0057] When the display screen displays a higher brightness image, in order to maintain the required brightness level, a larger power is required to drive the backlight, thereby generating brighter light, so that the display screen can display a higher brightness image. Therefore, the brightness value of the brightness image can be obtained by obtaining the first brightness value of the display area where the brightness image is located, and the second brightness value of the display area where the light-transmitting image is located can be obtained as the brightness value of the light-transmitting image. The light transmittance of the product to be tested can be determined by calculating the first brightness value and the second brightness value.

[0058] The light transmission detection method of this embodiment captures brightness images and light transmission images by shooting, and can enlarge or reduce the captured object by zooming. The acquisition process is not limited by product size and can be applied to light transmission detection of products of various sizes to be tested.

[0059] For example, the light transmission detection system 100 of this embodiment can be applied to the light transmission detection of all or part of the light transmission parts on the vehicle. With the development of automobile intelligence, the use of high and low light prompts for human-computer interaction between drivers and pedestrians during driving can no longer meet future market needs, and more complex bumper assemblies are used in automobile production. At present, bumper assemblies that are fully or partially light-transmitting and have customizable light-transmitting patterns / logos are favored by many consumers as measures to improve the appearance of the car and improve human-computer interaction during driving. Light-transmitting bumper assemblies need to be tested for light transmittance during the development process, and the light transmittance of the illuminated bumper assembly also needs to be tested after assembly.

[0060] However, the samples need to be sent to the laboratory for testing for transmittance and brightness testing. And the testing equipment has certain requirements for the size of the light-transmitting area of ​​the product to be tested. For example, in the design of a certain car model, the light-transmitting aperture of the bumper assembly is 0.3mm, and the size of the light-transmitting equipment detection area requires that the light-transmitting aperture of the product to be tested is not less than 21mm, which makes it impossible to test the bumper assembly of this model. It is necessary to make a separate bumper assembly with a light-transmitting aperture greater than 21mm for testing. However, different processes cause changes in the thickness of the substrate, and there is a certain deviation between the test results and the actual process, and there are also large differences in the detected data. In addition, for other light-transmitting components that meet the light-transmitting aperture requirements, the corresponding light-transmitting parts may need to be cut out for testing due to their large size. If multiple areas are tested, sampling is required at multiple locations, which will damage the product.

[0061] In order to solve the above problems, the light transmission detection method of this embodiment can be used to detect the light transmission parts of the vehicle. By shooting and collecting brightness images and light transmission images, brightness images and light transmission images can be collected for light transmission parts with different light transmission apertures and different sizes. For large-sized light transmission parts, overall sampling can be carried out, and for local light transmission parts on the vehicle, local sampling can be carried out. It is not limited by product characteristics, reducing the cost of separate process processing of products to meet the detection size requirements in the past, and there is no need to destroy the vehicle for detection, and multiple detections can be carried out. The problem of equipment limitation of light transmission part detection is solved, and the convenience of detection is improved. There is no designated light transmission part for the light source 110 for light transmission detection, and the light source 110 can be sampled by light-emitting equipment such as flashlights, further improving basic convenience.

[0062] The captured image can be viewed on the display device 130, and the brightness is calculated by real-time capturing the driving current and driving voltage of the display area where the image is located, and then the transmittance of the product to be tested is calculated based on the brightness difference between the brightness image and the transmittance image.

[0063] This application obtains the brightness image and light transmission image of the product to be tested, displays the brightness image and the light transmission image, and then respectively calculates the brightness of the display area where the brightness image is located and the brightness of the display area where the light transmission image is located, and then calculates the light transmittance of the product to be tested based on the brightness difference between the brightness image and the light transmission image. The light transmission detection is easy to operate, suitable for brightness detection and light transmission detection of products of various sizes, does not need to destroy the overall product, has strong flexibility and adaptability, and has high test efficiency and accuracy.

[0064] Reference Figure 5 In one embodiment, step S2 includes: S21: Acquire a first driving power of a display area where the brightness image is located and a second driving power of a display area where the light-transmitting image is located.

[0065] S22: Determine the first brightness value based on the first driving power and the first rated power.

[0066] S23: Determine the second brightness value based on the second driving power and the second rated power.

[0067] In this embodiment, the brightness of the display area is proportional to the driving power. Therefore, the brightness of the display area can be determined according to the driving power of the display area.

[0068] Specifically, the display device 130 further includes a voltage detection circuit, a current detection circuit, and a control circuit. The number of the voltage detection circuits and the current detection circuits is consistent with the number of display areas. Each voltage detection circuit is used to detect the driving voltage of one of the display areas. Each current detection circuit is used to detect the driving current of one of the display areas. The control circuit is used to calculate the product of the driving voltage and the driving current of the corresponding display area to obtain the driving power of the display area.

[0069] After that, the control circuit calculates the driving power of the display area and the calibrated driving power to obtain the brightness value of the display area: N=P1 / P0, where N is the brightness value of the display area, P1 is the driving power of the display area, and P0 is the calibrated driving power of the display area. The control circuit can determine the first brightness value N1 of the brightness image and the second brightness value N2 of the light-transmitting image through the above calculation.

[0070] Reference Figure 6 In one embodiment, step S2 includes: S24: Obtaining the actual brightness value and actual driving power of each display area.

[0071] S25: Determine a first correction coefficient for converting the power of each display area into brightness based on the ratio of the actual brightness value of each display area to the actual driving power.

[0072] S26: Acquire a first driving power of a display area where the brightness image is located and a second driving power of a display area where the light-transmitting image is located.

[0073] S27: Determine the first brightness value based on the first driving power, the first calibration power, and a first correction coefficient of the display area where the brightness image is located.

[0074] S28: Determine the second brightness value based on the second driving power, the second calibration power, and a first correction coefficient of the display area where the light-transmitting image is located.

[0075] In this embodiment, the control circuit obtains the brightness value of the display area by calculating the driving power of the display area and calibrating the driving power: N=(P1 / P0)×p, where p is the correction coefficient for power conversion to brightness. The control circuit can determine the first brightness value N1 of the brightness image and the second brightness value N2 of the light-transmitting image through the above calculation. When the driving power drives the backlight to emit light of a certain brightness, there is a certain loss due to circuit characteristics, environmental influences, measurement errors, etc. Therefore, adding the correction coefficient p for power conversion to brightness into the calculation can obtain a more accurate brightness value. Among them, the first correction coefficient p for power conversion to brightness can be determined by testing the corresponding display area using other pictures before testing.

[0076] Reference Figure 7 In one embodiment, step S3 includes: S31: Determine the light transmittance of the product to be tested based on the ratio of the second brightness value to the first brightness value: T=N2 / N1, where T is the light transmittance of the product to be tested.

[0077] Reference Figure 8 In one embodiment, step S3 includes: S32: Determine a first light transmittance based on a ratio of the second brightness value to the first brightness value.

[0078] S33: Obtaining the actual light transmittance of the product to be tested.

[0079] S34: Calculate the ratio of the first light transmittance to the actual light transmittance to obtain a converted light transmittance correction coefficient.

[0080] S35: Calculate the first brightness value, the second brightness value and the light transmittance correction coefficient to obtain the light transmittance of the product to be tested: T=(N2 / N1)×n, where n is the transmittance correction coefficient.

[0081] In this embodiment, due to the influence of measurement error, characteristics of the product to be tested, etc., the transmittance obtained by directly calculating N2 / N1 may have deviations. Therefore, adding the transmittance correction coefficient to the calculation can obtain a more accurate transmittance. Among them, the actual transmittance of the product to be tested can be obtained by the transmittance test method in the prior art.

[0082] Reference Fig. 9 In one embodiment, before obtaining the first brightness value of the brightness image display area and the second brightness value of the light transmission image display area, the light transmission detection method further includes: S4: Acquire image information of the brightness image and image information of the light transmission image.

[0083] S5: Controlling the first display area 131 to display the brightness image based on the image information of the brightness image.

[0084] S6: Controlling the second display area 132 to display the light-transmitting image based on the image information of the light-transmitting image.

[0085] In this embodiment, after the image acquisition device 120 collects the brightness image and the light transmission image for sampling, the image information of the brightness image and the light transmission image is imported into the display device 130. After the graphics processor in the display device 130 processes the imported image information, the display screen of the display device 130 is controlled to display it. Since the brightness of the brightness image and the light transmission image are different, the display screen is stimulated to have a brightness difference between the display area where the brightness image is located and the display area where the light transmission image is located, so that the brightness of the brightness image and the light transmission image can be determined by respectively detecting the brightness of the display area where the brightness image is located and the display area where the light transmission image is located.

[0086] Reference Fig.10 In one embodiment, before obtaining the first brightness value of the brightness image display area and the second brightness value of the light transmission image display area, the light transmission detection method further includes: S7: adjusting the sizes of the brightness image and the light-transmitting image based on the highest brightness point.

[0087] In this embodiment, there may be luminous areas and darker areas in the brightness image or the light transmission image. To facilitate the measurement of the image brightness, the image may be cropped to retain the luminous area and remove the darker area. Alternatively, there may be multiple luminous areas in the brightness image or the light transmission image, and one of the luminous areas may be selected to be retained and the other luminous areas may be removed.

[0088] In addition, the highest brightness point may be used as the center point of the image, and the brightness image and the light transmission image may be adjusted to unify the brightness detection areas of the brightness image and the light transmission image.

[0089] The present application also proposes a computer device, the computer device comprising a memory and a processor. The memory and the processor are coupled. The memory is used to store program instructions. The processor is used to read the program instructions stored in the memory to implement the above-mentioned light transmission detection method.

[0090] In this embodiment, the processor may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor, a single-chip microcomputer or a processor, or may be any conventional processor, etc.

[0091] The memory can be used to store computer programs and / or modules / units. The processor implements various functions of the computer device by running or executing the computer programs and / or modules / units stored in the memory and calling the data stored in the memory. The memory may include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application required for at least one function (such as a sound playback function, an image playback function, etc.), etc.; the data storage area may store data created according to the use of the computer device (such as audio data), etc. In addition, the memory may include a high-speed random access memory, and may also include a non-volatile memory, such as a hard disk, a memory, a plug-in hard disk, a smart memory card (Smart Media Card, SMC), a secure digital (Secure Digital, SD) card, a flash card (Flash Card), at least one disk storage device, a flash memory device, or other non-volatile solid-state memory 20 pieces.

[0092] If the module / unit integrated in the computer device is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the present application implements all or part of the processes in the above-mentioned embodiment method, and can also be completed by instructing the relevant hardware through a computer program. The computer program can be stored in a computer-readable storage medium, and the computer program can implement the steps of the above-mentioned various method embodiments when executed by the processor. Among them, the computer program includes computer program code, and the computer program code can be in source code form, object code form, executable file or some intermediate form. The computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, U disk, mobile hard disk, disk, optical disk, computer memory, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), electric carrier signal, telecommunication signal and software distribution medium. It should be noted that the content contained in the computer-readable medium can be appropriately increased or decreased according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, computer-readable media do not include electric carrier signals and telecommunication signals.

[0093] In the several embodiments provided in this application, it should be understood that the disclosed computer device and method can be implemented in other ways. For example, the computer device embodiment described above is only illustrative; the division of the units is only a logical function division, and there may be other division methods in actual implementation.

[0094] In addition, each functional unit in each embodiment of the present application may be integrated into the same processing unit, each unit may exist physically separately, or two or more units may be integrated into the same unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of hardware plus software functional modules.

[0095] In the above, the specific implementation of the present application is described with reference to the accompanying drawings. However, those skilled in the art will appreciate that various changes and substitutions may be made to the specific implementation of the present application without departing from the spirit and scope of the present application. These changes and substitutions are all within the scope defined by the present application.

Claims

1. A light transmission detection method, characterized in that: The light transmission detection method comprises: Acquire a brightness image of light emitted by a light source and a light transmission image after the light source passes through the product to be tested; Acquire a first brightness value of a display area where the brightness image is located and a second brightness value of a display area where the light-transmitting image is located; The light transmittance of the product to be tested is determined based on the first brightness value and the second brightness value.

2. The light transmission detection method according to claim 1, characterized in that: The obtaining of a first brightness value of a display area where the brightness image is located and a second brightness value of a display area where the light-transmitting image is located comprises: Acquire a first driving power of a display area where the brightness image is located and a second driving power of a display area where the light-transmitting image is located; Determining the first brightness value based on the first driving power and the first rated power; The second brightness value is determined based on the second driving power and the second rated power.

3. The light transmission detection method according to claim 1, characterized in that: The determining the light transmittance of the product to be tested based on the first brightness value and the second brightness value includes: Obtaining the actual brightness value and actual driving power of each display area; Determine a first correction coefficient for converting power of each display area into brightness based on a ratio of the actual brightness value of each display area to the actual driving power; Acquire a first driving power of a display area where the brightness image is located and a second driving power of a display area where the light-transmitting image is located; determining the first brightness value based on the first driving power, the first calibration power, and a first correction coefficient of the display area where the brightness image is located; The second brightness value is determined based on the second driving power, the second calibration power, and a first correction coefficient of the display area where the light-transmitting image is located.

4. The light transmission detection method according to claim 1, characterized in that: The determining the light transmittance of the product to be tested based on the first brightness value and the second brightness value includes: Based on the ratio of the second brightness value to the first brightness value, the light transmittance of the product to be tested is determined.

5. The light transmission detection method according to claim 1, characterized in that: The determining the light transmittance of the product to be tested based on the first brightness value and the second brightness value includes: determining a first light transmittance based on a ratio of the second brightness value to the first brightness value; Obtaining the actual light transmittance of the product to be tested; Calculating the ratio of the first light transmittance to the actual light transmittance to obtain a converted light transmittance correction coefficient; The transmittance of the product to be tested is determined based on the first brightness value, the second brightness value and the transmittance correction coefficient.

6. The light transmission detection method according to claim 1, characterized in that: Before acquiring a first brightness value of a display area where the brightness image is located and a second brightness value of a display area where the light transmission image is located, the light transmission detection method further includes: Acquire image information of the brightness image and image information of the light transmission image; controlling the first display area to display the brightness image based on the image information of the brightness image; The second display area is controlled to display the light-transmitting image based on the image information of the light-transmitting image.

7. The light transmission detection method according to claim 1, characterized in that: Before acquiring the first brightness value of the display area where the brightness image is located and the second brightness value of the display area where the light transmission image is located, the light transmission detection method further includes: Adjust the brightness image based on the position of the luminous area or the highest brightness point in the brightness image; The light-transmitting image is adjusted based on the position of the light-emitting area of ​​the light-transmitting image or the point with the highest brightness.

8. A light transmission detection system, characterized in that: The light transmission detection system comprises: A light source, used to emit light to the product to be tested; An image acquisition device, used to acquire a brightness image of the light emitted by the light source and a light transmission image of the light emitted by the light source after passing through the product to be tested; A display device, comprising a display area for displaying the brightness image and / or the light-transmitting image; the display device is further used to obtain a first brightness value of the display area where the brightness image is located and a second brightness value of the display area where the light-transmitting image is located; A control device is used to determine the light transmittance of the product to be tested based on the first brightness value and the second brightness value.

9. A computer device, characterized in that: The computer device includes a memory and a processor; The memory is coupled to the processor; The memory is used to store program instructions; The processor is used to read the program instructions stored in the memory to implement the light transmission detection method as described in any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer-readable instructions, and when the computer-readable instructions are executed by a processor, the light transmission detection method according to any one of claims 1 to 7 is implemented.

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