Mini LED chromaticity detection method, system and equipment

Abstract

The invention belongs to the technical field of testing, and particularly relates to testing of optical equipment, in particular to a Mini LED chromaticity detection method, system and equipment, and the Mini LED chromaticity detection method comprises the steps: adjusting the position of a refrigeration camera through a control module according to the short edge length of a backlight assembly; the control module obtains the change amount of the image distance according to the position of the refrigeration camera and the temperature of the refrigeration camera; the position of the backlight assembly is adjusted through the control module according to the change amount of the image distance, then the image of the backlight assembly is shot through the refrigeration camera to conduct chromaticity detection on the backlight assembly, then the distance between the lens of the refrigeration camera and the backlight assembly is accurately adjusted, image collection is more accurate, and detection is more accurate.

Description

Technical Field

[0001] The present invention belongs to the field of testing technology, specifically to the testing of optical equipment, and more particularly to a Mini LED chromaticity detection method, system, and equipment. Background Art

[0002] Existing Mini-LED backlight components need to undergo colorimetry testing before leaving the factory. Related technologies usually use image acquisition cameras to capture images of Mini-LED backlight components. However, since Mini-LED backlight components generate heat after being lit, the image acquisition camera will be damaged if exposed to heat for a long time, which in turn will cause the camera's image distance to change, resulting in a decrease in detection accuracy.

[0003] In related technologies, image acquisition uses an autofocus camera to adjust the image distance. However, for the detection of Mini-LED backlight components with high heat generation, a cooled camera is required. Most cooled cameras do not have an autofocus function. The frequent lighting and heating of the Mini-LED backlight components will cause different degrees of displacement between the lens bracket and the camera sensor substrate, which will cause the camera's image distance to change, resulting in a decrease in detection accuracy.

[0004] Therefore, to solve the technical problem of decreased detection accuracy due to changes in image distance, it is necessary to design an LED chromaticity detection method, system and equipment.

[0005] It should be noted that the above information disclosed in this background technology section is only used to understand the background technology of the present application concept, and therefore, the above description is not considered to constitute information of the prior art. Summary of the Invention

[0006] The embodiments of the present disclosure at least provide a Mini LED chromaticity detection method, system, and device.

[0007] In a first aspect, an embodiment of the present disclosure provides a Mini LED chromaticity detection method, comprising: The position of the cooling camera is adjusted according to the length of the short side of the backlight assembly through the control module; Obtaining a change in image distance according to the position of the cooling camera and the temperature of the cooling camera through a control module; The position of the backlight assembly is adjusted according to the change of the image distance by the control module, and then the image of the backlight assembly is photographed by the cooling camera to perform color detection on the backlight assembly.

[0008] In an optional embodiment, the method of obtaining the change in image distance according to the position of the refrigerated camera and the temperature of the refrigerated camera by the control module includes: The control module calculates the thermal expansion deformation of the lens holder according to the current temperature of the lens holder of the cooling camera at the current distance between the lens and the backlight assembly of the cooling camera: ΔV 1 =CTE 1 ·L 1 ·ΔT 1 ; in, ΔV 1 is the thermal expansion deformation of the lens holder; CTE 1 · is the thermal expansion coefficient of the lens holder; L 1 The length of the lens bracket at the preset standard temperature; ΔT 1 The temperature difference between the current temperature of the lens holder and the preset standard temperature; The current temperature of the lens holder is the ambient temperature of the refrigerated camera; The image distance is the distance between the lens of the refrigerated camera and the sensor substrate in the refrigerated camera.

[0009] In an optional embodiment, the method of obtaining the change in image distance according to the position of the refrigerated camera and the temperature of the refrigerated camera by the control module further includes: The control module obtains the thermal expansion deformation of the sensor substrate according to the current temperature of the sensor substrate in the cooling camera at the current distance between the lens and the backlight assembly of the cooling camera: ΔV 2 =CTE 2 ·L 2 ·ΔT 2 ; in, ΔV 2 is the thermal expansion deformation of the sensor substrate; CTE 2 is the thermal expansion coefficient of the sensor substrate; L 2 is the length of the sensor substrate at the preset standard temperature; ΔT 2 is the temperature difference between the current temperature of the sensor substrate and the preset standard temperature; The internal temperature of the refrigerated camera is the current temperature of the sensor substrate; Obtain the change in image distance through the control module: Δv=ΔV1 - ΔV 2 ; in, Δv is the change in image distance.

[0010] In an optional embodiment, the method of adjusting the position of the backlight assembly according to the change in the image distance by the control module includes: The object distance adjustment is obtained by the control module according to the change in image distance: ; in, Thu is the object distance adjustment; f is the focal length of the lens of the cooled camera; v 0 is the initial image distance; The object distance is the distance between the lens and the backlight assembly of the cooling camera; The control module controls the first moving mechanism to drive the backlight assembly to move a distance corresponding to the object distance adjustment amount, thereby completing the position adjustment of the backlight assembly.

[0011] In an optional embodiment, the method of adjusting the position of the cooling camera according to the length of the short side of the backlight assembly by the control module includes: The control module controls the second moving mechanism to drive the cooling camera to move according to the length of the short side of the backlight assembly. When the length of the short side of the backlight assembly is less than or equal to a preset length, the control module controls the second moving mechanism to drive the cooling camera to move so that the distance between the cooling camera lens and the backlight assembly reaches a first preset distance, where the first preset distance is the current distance between the cooling camera lens and the backlight assembly; When the short side length of the backlight assembly is greater than a preset length, the control module controls the second moving mechanism to drive the cooling camera to move so that the distance between the cooling camera lens and the backlight assembly reaches a preset multiple of the short side length of the backlight assembly. This distance is the current distance between the cooling camera lens and the backlight assembly.

[0012] In a second aspect, the embodiments of the present disclosure further provide a Mini LED chromaticity detection system, including: a coarse adjustment module configured to adjust the position of the cooling camera according to the length of the short side of the backlight assembly; a change amount acquisition module configured to acquire a change amount of the image distance according to the position of the cooling camera and the temperature of the cooling camera; The adjusting module is configured to adjust the position of the backlight assembly according to the change in the image distance.

[0013] In a third aspect, an embodiment of the present disclosure further provides a computer-readable storage medium on which a computer program / instruction is stored. When the computer program / instruction is executed by a processor, the steps of the above-mentioned Mini LED chromaticity detection method are implemented.

[0014] In a fourth aspect, an embodiment of the present disclosure further provides a computer program product, including a computer program / instruction, which implements the steps of the above-mentioned Mini LED chromaticity detection method when executed by a processor.

[0015] In a fifth aspect, the embodiments of the present disclosure further provide a Mini LED chromaticity detection device, including: a control module, and a cooling camera, a first moving mechanism, and a second moving mechanism electrically connected to the control module; The refrigerated camera is arranged on the second moving mechanism; The first moving mechanism is arranged below the backlight assembly, and the cooling camera is located above the backlight assembly; The control module is configured to use the above-mentioned Mini LED chromaticity detection method to control the first moving mechanism to drive the backlight assembly to rise and fall, and control the second moving mechanism to drive the cooling camera to rise and fall, so as to adjust the distance between the cooling camera and the backlight assembly.

[0016] In an optional embodiment, the control module is electrically connected to a pair of conveyor belts, the first moving mechanism is disposed between the two conveyor belts, and the first moving mechanism is located below the refrigerated camera; A backlight assembly is arranged between the two conveyor belts, and the control module is configured to control the two conveyor belts to operate synchronously to transport the backlight assembly to the bottom of the refrigerated camera, at which time the backlight assembly is located above the first moving mechanism; The control module is configured to control the first moving mechanism to lift the backlight assembly.

[0017] The beneficial effect of the present invention is that the Mini LED chromaticity detection method includes: adjusting the position of the cooling camera according to the length of the short side of the backlight assembly through the control module; obtaining the change in image distance according to the position of the cooling camera and the temperature at the cooling camera through the control module; adjusting the position of the backlight assembly according to the change in image distance through the control module, and then capturing the image of the backlight assembly through the cooling camera to perform chromaticity detection on the backlight assembly, thereby realizing precise adjustment of the distance between the cooling camera lens and the backlight assembly, making image acquisition more accurate and detection more accurate.

[0018] Other features and advantages of the present invention will be described in the following description, and in part will become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention are realized and obtained by the structures particularly pointed out in the description and the drawings.

[0019] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are specifically cited herein and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 A flow chart of a Mini LED chromaticity detection method provided in an embodiment of the present disclosure; Figure 2 A block diagram of the principle of a Mini LED chromaticity detection method provided in an embodiment of the present disclosure; Figure 3 A schematic structural diagram of a Mini LED chromaticity detection device provided in an embodiment of the present disclosure; Figure 4 A schematic structural diagram of a cooling camera provided in an embodiment of the present disclosure.

[0022] In the picture: 1. First moving mechanism, 2. Second moving mechanism, 3. Cooling camera, 4. Lens, 5. Lens bracket, 6. Conveyor belt, 7. Backlight assembly. DETAILED DESCRIPTION

[0023] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0024] As used herein, the phrases "in one embodiment," "according to one embodiment," "in some embodiments," and the like generally refer to the fact that the particular feature, structure, or characteristic following the phrase may be included in at least one embodiment of the present disclosure. Thus, a particular feature, structure, or characteristic may be included in more than one embodiment of the present disclosure, such that these phrases do not necessarily refer to the same embodiment. As used herein, the terms "example," "exemplary," and the like are used to "serve as an example, instance, or illustration." Any implementation, aspect, or design described herein as "example" or "exemplary" is not necessarily to be construed as preferred or advantageous over other implementations, aspects, or designs. Instead, the use of the terms "example," "exemplary," and the like is intended to present concepts in a concrete manner.

[0025] According to the Mini-LED Backlight Assembly General Technical Specification Group Standard, the measurement distance should be 0.5m (short side length ≤ 0.2m) or 2.5 times the short side length (short side length > 0.2m). Therefore, for Mini-LED backlight assemblies of different sizes, the position of the image acquisition camera needs to be constantly adjusted. The inventors found that since the Mini-LED backlight assembly generates heat after being lit, when the detection distance changes (such as 0.5m→3m), the heat exchange rate between the camera housing and the environment changes, causing the lens bracket and the sensor substrate to move to varying degrees, thereby causing the camera's image distance to change. In related technologies, the method of moving the sensor substrate is used to compensate for the displacement error. However, the inventors found that for the detection of Mini-LED backlight assemblies, moving the sensor substrate will cause the cooling efficiency of the cooling camera to change, which may cause a surge in dark current. This is because if a movable sensor substrate is set, a fixed contact cooling method cannot be used, which will cause a significant decrease in the cooling effect.

[0026] The defects in the above solutions are the results obtained by the inventors after practice and careful research. Therefore, the discovery process of the above problems and the solutions proposed by the present disclosure in this article should be the contributions made by the inventors to the present disclosure during the disclosure process.

[0027] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0028] The following embodiments of the present invention are described in detail with reference to the accompanying drawings. In the absence of conflict, the following embodiments and features therein may be combined with each other.

[0029] like Figure 1As shown, at least one disclosed embodiment provides a Mini LED chromaticity detection method, including: adjusting the position of the cooling camera 3 according to the length of the short side of the backlight assembly 7 through the control module; obtaining the change in image distance according to the position of the cooling camera 3 and the temperature at the cooling camera 3 through the control module; adjusting the position of the backlight assembly 7 according to the change in image distance through the control module, and then capturing the image of the backlight assembly 7 through the cooling camera 3 to perform chromaticity detection on the backlight assembly 7, thereby achieving precise adjustment of the distance between the lens 4 of the cooling camera 3 and the backlight assembly 7, making image acquisition more accurate and detection more accurate.

[0030] In this embodiment, the backlight assembly 7 is a Mini LED backlight assembly.

[0031] In this embodiment, the backlight assembly 7 is moved to compensate for the change in image distance caused by temperature, thereby avoiding the change in the cooling efficiency of the cooling camera 3 caused by moving the sensor substrate, thereby avoiding the possible surge in dark current, ensuring that subsequent image acquisition is more accurate and detection is more precise.

[0032] like Figure 4 As shown, in an optional embodiment, the method of obtaining the change in image distance based on the position of the cooling camera 3 and the temperature at the cooling camera 3 by the control module includes: calculating, by the control module, the thermal expansion deformation of the lens holder 5 based on the current temperature of the lens holder 5 of the cooling camera 3 at the current distance between the lens 4 of the cooling camera 3 and the backlight assembly 7: ΔV 1 =CTE 1 ·L 1 ·ΔT 1 ; in, ΔV 1 is the thermal expansion deformation of the lens holder 5, in mm; CTE 1 is the thermal expansion coefficient of the lens holder 5; L 1 is the length of the lens holder 5 at the preset standard temperature, in mm; ΔT 1 The temperature difference between the current temperature of the lens holder 5 and the preset standard temperature, in °C; The current temperature of the lens holder 5 is the ambient temperature of the refrigerated camera 3 ; the image distance is the distance between the lens 4 of the refrigerated camera 3 and the sensor substrate in the refrigerated camera 3 .

[0033] like Figure 2As shown, in this embodiment, a temperature sensor may be provided on the cooling camera 3 , and the temperature sensor is electrically connected to the control module. The temperature at the cooling camera 3 is detected by the temperature sensor, and the temperature is the current temperature of the lens holder 5 .

[0034] In this embodiment, the material of the lens holder 5 is aluminum. CTE 1 The specific parameters are 23×10 -6 / ℃.

[0035] In an optional embodiment, the method of obtaining the change in image distance according to the position of the refrigerated camera 3 and the temperature of the refrigerated camera 3 by the control module further includes: The control module obtains the thermal expansion deformation of the sensor substrate according to the current temperature of the sensor substrate in the cooling camera 3 at the current distance between the lens 4 and the backlight assembly 7 of the cooling camera 3: ΔV 2 =CTE 2 ·L 2 ·ΔT 2 ; in, ΔV 2 is the thermal expansion deformation of the sensor substrate, in mm; CTE 2 is the thermal expansion coefficient of the sensor substrate; L 2 is the length of the sensor substrate at the preset standard temperature, in mm; ΔT 2 The temperature difference between the current temperature of the sensor substrate and the preset standard temperature, in °C; The internal temperature of the cooling camera 3 is the current temperature of the sensor substrate; Obtain the change in image distance through the control module: Δv=ΔV 1 - ΔV 2 ; in, Δv is the change in image distance, in mm.

[0036] In this embodiment, the material of the sensor substrate is silicon. CTE 2 The specific parameters are 2.6×10 -6 / ℃.

[0037] In this embodiment, the sensor substrate is disposed inside the cooling camera 3 , and an image sensor is disposed on the sensor substrate to obtain an image of the backlight assembly 7 when the backlight assembly 7 is turned on, so as to facilitate subsequent detection of the chromaticity of the backlight assembly 7 .

[0038] In this embodiment, a temperature sensor is also provided inside the refrigerated camera 3 . The temperature sensor is electrically connected to the control module. The temperature sensor detects the temperature inside the refrigerated camera 3 , which is the current temperature of the sensor substrate.

[0039] In an optional embodiment, the method of adjusting the position of the backlight assembly 7 according to the change in the image distance by the control module includes: obtaining the object distance adjustment amount according to the change in the image distance by the control module: ; in, Thu is the object distance adjustment amount, in mm; f is the focal length of the lens 4 of the cooling camera 3, in mm; v 0 is the initial image distance, in mm; The object distance is the distance between the lens 4 of the cooling camera 3 and the backlight assembly 7; the control module controls the first moving mechanism 1 to drive the backlight assembly 7 to move a distance corresponding to the object distance adjustment amount, thereby completing the position adjustment of the backlight assembly 7.

[0040] In this embodiment, the focal length of the lens 4 of the cooling camera 3 is f is the factory parameter of the refrigerated camera 3; the initial image distance is the distance between the lens 4 and the image sensor on the sensor substrate, which is the factory parameter of the refrigerated camera 3.

[0041] In an optional embodiment, the method of adjusting the position of the cooling camera 3 according to the length of the short side of the backlight assembly 7 by the control module includes: the control module controls the second moving mechanism 2 to drive the cooling camera 3 to move according to the length of the short side of the backlight assembly 7, that is, When the short side length of the backlight assembly 7 is less than or equal to the preset length, the control module controls the second moving mechanism 2 to drive the cooling camera 3 to move so that the distance between the lens 4 of the cooling camera 3 and the backlight assembly 7 reaches a first preset distance, which is the current distance between the lens 4 of the cooling camera 3 and the backlight assembly 7; When the short side length of the backlight assembly 7 is greater than the preset length, the control module controls the second moving mechanism 2 to drive the cooling camera 3 to move, so that the distance between the lens 4 of the cooling camera 3 and the backlight assembly 7 reaches a preset multiple of the short side length of the backlight assembly 7. This distance is the current distance between the lens 4 of the cooling camera 3 and the backlight assembly 7.

[0042] In this embodiment, the preset length is 0.2m, i.e. 200mm. When the short side length of the backlight assembly 7 is less than or equal to 200mm, the current distance between the lens 4 of the cooling camera 3 and the backlight assembly 7 is 0.5m, i.e. 500mm; when the short side length of the backlight assembly 7 is greater than 200mm, the current distance between the lens 4 of the cooling camera 3 and the backlight assembly 7 is 2.5 times the short side length of the backlight assembly 7.

[0043] Specifically, the current distance is 750 mm, and the thermal expansion coefficient of the lens holder 5 is 23×10 -6 / ℃, the length of the lens holder 5 at the preset standard temperature is 50 mm, the temperature difference between the current temperature of the lens holder 5 and the preset standard temperature is 10 degrees Celsius, and the thermal expansion coefficient of the sensor substrate is 2.6×10 -6 / ℃, the length of the sensor substrate at the preset standard temperature is 20mm, the temperature difference between the current temperature of the sensor substrate and the preset standard temperature is 5 degrees Celsius, the focal length of the lens 4 of the cooling camera 3 is 50mm, and the initial image distance is 52mm, then ΔV 1 =23×10 -6 ／℃·50·10=1.15×10 -2 mm? ΔV 2 =2.6×10 -6 ／℃·20·5=2.6×10 -4 mm? Δv=1.15×10 -2 －2.6×10 -4 =1.124×10 -2 mm? ; The control module can also obtain the new object distance according to the object distance adjustment amount: u=u 0 +Du ;in u is the new object distance, u=750－ 7.025=742.975mmA distance sensor can be provided on the cooling camera 3 to detect the distance between the lens 4 and the backlight assembly 7. The control module can be electrically connected to the distance sensor to obtain the distance between the lens 4 and the backlight assembly 7 in real time. The control module can control the second moving mechanism 2 to drive the cooling camera 3 to rise and fall so that the distance between the lens 4 and the backlight assembly 7 meets the current distance requirement. In this process, the distance sensor is used to obtain the distance in real time, thereby realizing precise control of the second moving mechanism 2. The second moving mechanism 2 can be composed of a servo motor and supporting components to achieve precise movement.

[0044] In this embodiment, the first moving mechanism 1 can adopt a micron-level moving mechanism, such as a MEMS actuator, to achieve fine-tuning of the backlight assembly 7. The control module can control the first moving mechanism 1 to drive the backlight assembly 7 to move according to the object distance adjustment amount to meet the needs of subsequent precise detection.

[0045] In this embodiment, when the object distance adjustment amount is a positive number, the first moving mechanism 1 drives the backlight assembly 7 to move closer to the lens 4 .

[0046] At least one other disclosed embodiment also provides a Mini LED colorimetry detection system, including: a coarse adjustment module, which is configured to adjust the position of the cooling camera 3 according to the length of the short side of the backlight assembly 7; a change amount acquisition module, which is configured to acquire the change in image distance according to the position of the cooling camera 3 and the temperature at the cooling camera 3; and an adjustment module, which is configured to adjust the position of the backlight assembly 7 according to the change in image distance.

[0047] In this embodiment, the above modules may be virtual modules, and their functions may be integrated into the control module.

[0048] At least one other disclosed embodiment further provides a computer-readable storage medium having a computer program / instruction stored thereon, which, when executed by a processor, implements the steps of the above-mentioned Mini LED chromaticity detection method.

[0049] At least one other disclosed embodiment further provides a computer program product, comprising a computer program / instruction, which, when executed by a processor, implements the steps of the above-mentioned Mini LED chromaticity detection method.

[0050] like Figure 3As shown, at least one other disclosed embodiment also provides a Mini LED chromaticity detection device, including: a control module, and a cooling camera 3, a first moving mechanism 1 and a second moving mechanism 2 electrically connected to the control module; the cooling camera 3 is arranged on the second moving mechanism 2; the first moving mechanism 1 is arranged below the backlight assembly 7, and the cooling camera 3 is located above the backlight assembly 7; the control module is configured to use the above-mentioned Mini LED chromaticity detection method to control the first moving mechanism 1 to drive the backlight assembly 7 to rise and fall, and control the second moving mechanism 2 to drive the cooling camera 3 to rise and fall, so as to adjust the distance between the cooling camera 3 and the backlight assembly 7.

[0051] In an optional embodiment, the control module is electrically connected to a pair of conveyor belts 6, the first moving mechanism 1 is arranged between the two conveyor belts 6, and the first moving mechanism 1 is located below the refrigerated camera 3; a backlight assembly 7 is arranged between the two conveyor belts 6, and the control module is configured to control the two conveyor belts 6 to work synchronously to transport the backlight assembly 7 to the bottom of the refrigerated camera 3, at which time the backlight assembly 7 is located above the first moving mechanism 1; the control module is configured to control the first moving mechanism 1 to lift the backlight assembly 7.

[0052] In this embodiment, after the conveyor belt 6 moves the backlight assembly 7 to the bottom of the refrigerated camera 3, the control module can first control the first moving mechanism 1 to drive the backlight assembly 7 to rise, so that the backlight assembly 7 is separated from the conveyor belt 6 and is located above the conveyor belt 6. There is a certain height between the backlight assembly 7 and the conveyor belt 6, so that when the distance between the backlight assembly 7 and the lens 4 needs to be adjusted later, if the backlight assembly 7 needs to be lowered, the height between the backlight assembly 7 and the conveyor belt 6 can meet the requirement of lowering the backlight assembly 7.

[0053] In this embodiment, when the backlight assembly 7 is lifted to a certain height from the conveyor belt 6, the control module controls the second moving mechanism 2 to drive the cooling camera 3 to move so that the current distance between the lens 4 and the backlight assembly 7 meets the corresponding requirements.

[0054] To sum up, the Mini LED chromaticity detection method includes: adjusting the position of the cooling camera 3 according to the length of the short side of the backlight assembly 7 through the control module; obtaining the change in image distance according to the position of the cooling camera 3 and the temperature at the cooling camera 3 through the control module; adjusting the position of the backlight assembly 7 according to the change in image distance through the control module, and then capturing the image of the backlight assembly 7 through the cooling camera 3 to perform chromaticity detection on the backlight assembly 7, thereby realizing precise adjustment of the distance between the lens 4 of the cooling camera 3 and the backlight assembly 7, making image acquisition more accurate and detection more accurate.

[0055] The disclosure and other solutions, examples, embodiments, modules, and functional operations described in this document can be implemented in digital electronic circuitry, or in computer software, firmware, or hardware, including the structures disclosed in this document and their structural equivalents, or a combination of one or more thereof. The disclosure and other embodiments can be implemented as one or more computer program products, i.e., one or more modules of computer program instructions encoded on a tangible and non-volatile computer-readable medium, for execution by a data processing apparatus or to control the operation of the data processing apparatus. The computer-readable medium can be a machine-readable storage device, a machine-readable storage substrate, a storage device, a composition of matter that effects a machine-readable propagated signal, or a combination of any one or more thereof. In addition to hardware, the apparatus can also include code that creates an execution environment for a computer program, such as code constituting processor firmware, a protocol stack, a database management system, an operating system, or a combination of any one or more thereof. A propagated signal is an artificially generated signal, such as a machine-generated electrical, optical, or electromagnetic signal, that is generated to encode information for transmission to a suitable receiver device.

[0056] A computer program (also referred to as a program, software, software application, script, or code) may be written in any form of programming language (including compiled or interpreted languages) and may be deployed in any form, including as a standalone program or as a module, component, subroutine, or other unit suitable for use in a computing environment. A computer program does not necessarily correspond to a file in a file system. A program may be stored in a portion of a file that holds other programs or data (e.g., one or more scripts stored in a markup language document), in a single file dedicated to the program, or in multiple coordinated files (e.g., files storing one or more modules, subroutines, or portions of code). A computer program may be deployed for execution on one or more computers, located at one site or distributed across multiple sites and interconnected by a communications network.

[0057] The processes and logic flows described in this document can be performed by one or more programmable processors executing one or more computer programs to perform functions by operating on input data and generating output. The processes and logic flows can also be performed by, and apparatus can also be implemented as, special-purpose logic circuitry, e.g., an FPGA (field programmable gate array) or an ASIC (application-specific integrated circuit).

[0058] For example, processors suitable for executing computer programs include general-purpose and special-purpose microprocessors, as well as any one or more of any type of digital computer. Typically, a processor will receive instructions and data from read-only memory or random access memory, or both. The essential components of a computer are a processor that executes instructions and one or more memory devices that store instructions and data. Typically, a computer will also include one or more mass storage devices for storing data, such as magnetic, magneto-optical, or optical disks, or be operatively coupled to receive data from or transfer data to a mass storage device, or both. However, a computer need not have such devices. Computer-readable media suitable for storing computer program instructions and data include all forms of nonvolatile memory, media, and storage devices, including, for example, semiconductor memory devices, such as erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), and flash memory devices; magnetic disks, such as internal hard disks or removable disks; magneto-optical disks; and compact disk read-only memory (CD ROM) and digital versatile disk read-only memory (DVD-ROM) disks. The processor and memory may be supplemented by, or incorporated into, special-purpose logic circuitry.

[0059] Although several embodiments are provided in this disclosure, it should be understood that the disclosed systems and methods may be embodied in many other specific forms without departing from the spirit or scope of the present disclosure. The present examples are to be considered illustrative rather than restrictive, and the present invention is not to be construed as being limited to the details given. For example, various elements or components may be combined or integrated into another system, or certain features may be omitted or not implemented.

[0060] In the several embodiments provided herein, it should be understood that the disclosed devices and methods may also be implemented in other ways. The device embodiments described above are merely illustrative. For example, the flowcharts and block diagrams in the accompanying drawings show the possible architectures, functions, and operations of the devices, methods, and computer program products according to multiple embodiments of the present invention. In this regard, each box in the flowchart or block diagram may represent a module, program segment, or part of a code, which contains one or more executable instructions for implementing the specified logical functions. It should also be noted that in some alternative implementations, the functions marked in the boxes may also occur in an order different from that marked in the accompanying drawings. For example, two consecutive boxes can actually be executed substantially in parallel, or they may sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram and / or flowchart, as well as the combination of boxes in the block diagram and / or flowchart, may be implemented using a dedicated hardware-based system that performs the specified functions or actions, or may be implemented using a combination of dedicated hardware and computer instructions.

[0061] With the above-described preferred embodiments of the present invention as a guide, and with reference to the above description, relevant personnel are fully capable of making various changes and modifications without departing from the technical scope of this invention. The technical scope of this invention is not limited to the contents of the specification and must be determined according to the scope of the claims.

Claims

1. A Mini LED chromaticity detection method, characterized in that: include: Adjusting the position of the cooling camera (3) according to the length of the short side of the backlight assembly (7) through the control module; Obtaining a change in image distance according to the position of the cooling camera (3) and the temperature at the cooling camera (3) through a control module; The position of the backlight assembly (7) is adjusted by the control module according to the change in the image distance, and then the image of the backlight assembly (7) is captured by the cooling camera (3) to perform colorimetric detection on the backlight assembly (7); The method for adjusting the position of the cooling camera (3) according to the length of the short side of the backlight assembly (7) by the control module comprises: The control module controls the second moving mechanism (2) to drive the cooling camera (3) to move according to the length of the short side of the backlight assembly (7), that is, When the length of the short side of the backlight assembly (7) is less than or equal to a preset length, the control module controls the second moving mechanism (2) to drive the cooling camera (3) to move, so that the distance between the lens (4) of the cooling camera (3) and the backlight assembly (7) reaches a first preset distance, and the first preset distance is the current distance between the lens (4) of the cooling camera (3) and the backlight assembly (7); When the length of the short side of the backlight assembly (7) is greater than a preset length, the control module controls the second moving mechanism (2) to drive the cooling camera (3) to move, so that the distance between the lens (4) of the cooling camera (3) and the backlight assembly (7) reaches a preset multiple of the length of the short side of the backlight assembly (7), and the distance is the current distance between the lens (4) of the cooling camera (3) and the backlight assembly (7).

2. The Mini LED chromaticity detection method according to claim 1, wherein: The method for obtaining the change in image distance according to the position of the refrigerated camera (3) and the temperature at the refrigerated camera (3) by a control module comprises: The control module calculates the thermal expansion deformation of the lens holder (5) according to the current temperature of the lens holder (5) of the cooling camera (3) at the current distance between the lens (4) of the cooling camera (3) and the backlight assembly (7): ΔV 1 =CTE 1 ·L 1 ΔT 1 ； in, ΔV 1 is the thermal expansion deformation of the lens holder (5); CTE 1 is the thermal expansion coefficient of the lens holder (5); L 1 is the length of the lens holder (5) at a preset standard temperature; ΔT 1 is the temperature difference between the current temperature of the lens holder (5) and the preset standard temperature; The current temperature of the lens holder (5) is the ambient temperature of the refrigerated camera (3); The image distance is the distance between the lens (4) of the refrigerated camera (3) and the sensor substrate in the refrigerated camera (3).

3. The Mini LED chromaticity detection method according to claim 2, wherein: The method of obtaining the change in image distance according to the position of the refrigerated camera (3) and the temperature at the refrigerated camera (3) by the control module further includes: The control module obtains the thermal expansion deformation of the sensor substrate in the cooling camera (3) according to the current temperature of the sensor substrate at the current distance between the lens (4) and the backlight assembly (7) of the cooling camera (3): ΔV 2 =CTE 2 ·L 2 ΔT 2 ； in, ΔV 2 is the thermal expansion deformation of the sensor substrate; CTE 2 is the thermal expansion coefficient of the sensor substrate; L 2 is the length of the sensor substrate at the preset standard temperature; ΔT 2 is the temperature difference between the current temperature of the sensor substrate and the preset standard temperature; The internal temperature of the refrigerated camera (3) is the current temperature of the sensor substrate; Obtain the change in image distance through the control module: Δv=ΔV 1 - ΔV 2 ； in, Δv is the change in image distance.

4. The Mini LED chromaticity detection method according to claim 1, wherein: The method for adjusting the position of the backlight assembly (7) according to the change in image distance by a control module comprises: The object distance adjustment is obtained by the control module according to the change in image distance: ； in, Δu is the object distance adjustment; f is the focal length of the lens (4) of the cooling camera (3); v 0 is the initial image distance; The object distance is the distance between the lens (4) of the cooling camera (3) and the backlight assembly (7); The control module controls the first moving mechanism (1) to drive the backlight assembly (7) to move a distance corresponding to the object distance adjustment amount, thereby completing the position adjustment of the backlight assembly (7).

5. A Mini LED colorimetry system, characterized in that: include: a coarse adjustment module configured to adjust the position of the cooling camera (3) according to the length of the short side of the backlight assembly (7); a change amount acquisition module configured to acquire the change amount of the image distance according to the position of the refrigerated camera (3) and the temperature at the refrigerated camera (3); An adjustment module is configured to adjust the position of the backlight assembly (7) according to the change in the image distance.

6. A computer-readable storage medium having a computer program / instruction stored thereon, characterized in that: When the computer program / instruction is executed by a processor, the steps of the Mini LED chromaticity detection method according to any one of claims 1 to 4 are implemented.

7. A computer program product comprising a computer program / instructions, characterized in that When the computer program / instruction is executed by a processor, the steps of the Mini LED chromaticity detection method according to any one of claims 1 to 4 are implemented.

8. A Mini LED color detection device, characterized in that: include: A control module, and a cooling camera (3), a first moving mechanism (1), and a second moving mechanism (2) electrically connected to the control module; The refrigerated camera (3) is arranged on the second moving mechanism (2); The first moving mechanism (1) is arranged below the backlight assembly (7), and the cooling camera (3) is located above the backlight assembly (7); The control module is configured to use the Mini LED chromaticity detection method according to any one of claims 1 to 5 to control the first moving mechanism (1) to drive the backlight assembly (7) to move up and down, and to control the second moving mechanism (2) to drive the cooling camera (3) to move up and down, so as to adjust the distance between the cooling camera (3) and the backlight assembly (7).

9. The Mini LED chromaticity detection device according to claim 8, wherein: The control module is electrically connected to a pair of conveyor belts (6), the first moving mechanism (1) is arranged between the two conveyor belts (6), and the first moving mechanism (1) is located below the refrigeration camera (3); A backlight assembly (7) is arranged between the two conveyor belts (6), and the control module is configured to control the two conveyor belts (6) to operate synchronously to transport the backlight assembly (7) to the bottom of the refrigerated camera (3), at which time the backlight assembly (7) is located above the first moving mechanism (1); The control module is configured to control the first moving mechanism (1) to lift the backlight assembly (7).

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