Mini LED colorimetric detection methods, systems and equipment

Abstract

This invention belongs to the field of testing technology, specifically relating to the testing of optical equipment, and particularly to a Mini LED colorimetric detection method, system, and device. The Mini LED colorimetric detection method includes: adjusting the position of a cooled camera based on the short side length of a backlight assembly using a control module; obtaining the change in image distance based on the position of the cooled camera and the temperature at the cooled camera using the control module; adjusting the position of the backlight assembly based on the change in image distance using the control module; and then capturing an image of the backlight assembly using the cooled camera to perform colorimetric detection on the backlight assembly. This achieves precise adjustment of the distance between the cooled camera lens and the backlight assembly, resulting in more accurate image acquisition and detection.

Description

Technical Field

[0001] This invention belongs to the field of testing technology, specifically relating to the testing of optical equipment, and more particularly to a method, system and device for Mini LED colorimetric detection. Background Technology

[0002] Existing Mini-LED backlight components require colorimetric testing before leaving the factory. In related technologies, image acquisition cameras are usually used to capture images of the Mini-LED backlight components. However, since the Mini-LED backlight components generate heat after being lit, prolonged exposure of the image acquisition camera to heat can damage the camera, leading to changes in the camera's image distance and 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 autofocus. The frequent lighting and heat generation of the Mini-LED backlight components can cause different degrees of displacement between the lens bracket and the camera sensor substrate, which in turn changes the image distance of the camera and reduces the detection accuracy.

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

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

[0006] This disclosure provides at least one Mini LED colorimetric detection method, system, and device.

[0007] In a first aspect, embodiments of this disclosure provide a Mini LED colorimetric detection method, including:

[0008] The position of the cooling camera is adjusted by the control module according to the short side length of the backlight assembly;

[0009] The control module obtains the change in image distance based on the position of the cooling camera and the temperature at the cooling camera.

[0010] The control module adjusts the position of the backlight assembly according to the change in image distance, and then a cooled camera captures an image of the backlight assembly to perform colorimetric detection on the backlight assembly.

[0011] In one optional implementation, the method of obtaining the change in image distance by the control module based on the position of the cooled camera and the temperature at the cooled camera includes:

[0012] The control module calculates the thermal expansion deformation of the lens mount based on the current temperature of the lens mount, given the current distance between the lens and backlight assembly of the cooled camera.

[0013] ΔV 1 =CTE 1 ·L 1 ·ΔT 1 ;

[0014] in, ΔV 1 For the thermal expansion deformation of the lens bracket; CTE 1 · The coefficient of thermal expansion of the lens mount; L 1 The length of the lens support at a preset standard temperature; ΔT 1 This represents the temperature difference between the current temperature of the lens mount and the preset standard temperature.

[0015] The current temperature of the lens bracket is the ambient temperature at the location of the cooling camera.

[0016] The image distance is the distance between the lens of the cooled camera and the sensor substrate in the cooled camera.

[0017] In an optional implementation, the method for obtaining the change in image distance by the control module based on the position of the cooled camera and the temperature at the cooled camera further includes:

[0018] The control module obtains the thermal expansion deformation of the sensor substrate based on the current temperature of the sensor substrate in the cooled camera, given the current distance between the lens and the backlight assembly.

[0019] ΔV 2 =CTE 2 ·L 2 ·ΔT 2 ;

[0020] in, ΔV 2 The thermal expansion deformation of the sensor substrate; CTE 2 The coefficient of thermal expansion of the sensor substrate; L 2 The length of the sensor substrate at a preset standard temperature; ΔT 2This is the temperature difference between the current temperature of the sensor substrate and the preset standard temperature.

[0021] The internal temperature of the cooled camera is the current temperature of the sensor substrate;

[0022] The change in image distance is obtained through the control module:

[0023] Δv=ΔV 1 - ΔV 2 ;

[0024] in, Δv This represents the change in image distance.

[0025] In one optional implementation, the method of adjusting the position of the backlight assembly by the control module according to the change in image distance includes:

[0026] The object distance adjustment amount is obtained by the control module based on the change in image distance:

[0027] ;

[0028] in, Thu This is the object distance adjustment amount; f The focal length of the camera lens for cooling; v 0 The initial image distance;

[0029] The object distance is the distance between the lens and the backlight assembly of the cooled camera;

[0030] The control module controls the first moving mechanism to move the backlight assembly a distance corresponding to the object distance adjustment, thereby completing the position adjustment of the backlight assembly.

[0031] In one optional implementation, the method of adjusting the position of the cooled camera by the control module according to the short side length of the backlight assembly includes:

[0032] The control module controls the second moving mechanism to move the cooled camera based on the length of the shorter side of the backlight assembly.

[0033] When the short side length of the backlight assembly is less than or equal to the preset length, the control module controls the second moving mechanism to move the cooling camera, so that the distance between the cooling camera lens and the backlight assembly reaches the first preset distance, which is the current distance between the cooling camera lens and the backlight assembly.

[0034] When the shorter side of the backlight assembly is longer than a preset length, the control module controls the second moving mechanism to move the cooled camera, so that the distance between the lens of the cooled camera and the backlight assembly reaches a preset multiple of the shorter side of the backlight assembly. This distance is the current distance between the lens of the cooled camera and the backlight assembly.

[0035] Secondly, embodiments of this disclosure also provide a Mini LED colorimetric detection system, comprising:

[0036] A coarse adjustment module is configured to adjust the position of the cooled camera according to the short side length of the backlight assembly;

[0037] The change acquisition module is configured to acquire the change in image distance based on the position of the cooled camera and the temperature at the cooled camera.

[0038] The adjustment module is configured to adjust the position of the backlight assembly based on the change in image distance.

[0039] Thirdly, embodiments of this disclosure also provide a computer-readable storage medium storing a computer program / instructions thereon, which, when executed by a processor, implements the steps of the Mini LED colorimetric detection method described above.

[0040] Fourthly, embodiments of this disclosure also provide a computer program product, including a computer program / instructions, which, when executed by a processor, implement the steps of the Mini LED colorimetric detection method described above.

[0041] Fifthly, embodiments of this disclosure also provide a Mini LED colorimetric detection device, comprising:

[0042] A control module, and a cooling camera, a first moving mechanism, and a second moving mechanism electrically connected to the control module;

[0043] The cooling camera is mounted on the second moving mechanism;

[0044] The first moving mechanism is located below the backlight assembly, and the cooled camera is located above the backlight assembly;

[0045] The control module is configured to use the aforementioned Mini LED colorimetric detection method to control the first moving mechanism to drive the backlight assembly to rise and fall, and to 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.

[0046] In one alternative implementation, the control module is electrically connected to a pair of conveyor belts, and the first moving mechanism is disposed between the two conveyor belts and located below the cooling camera.

[0047] A backlight assembly is installed between two conveyor belts. The control module is configured to control the two conveyor belts to work synchronously to transport the backlight assembly to the area below the cooling camera. At this time, the backlight assembly is located above the first moving mechanism.

[0048] The control module is configured to control the first moving mechanism to lift the backlight assembly.

[0049] The beneficial effects of this invention are that the Mini LED colorimetric detection method includes: adjusting the position of the cooled camera according to the short side length of the backlight assembly through a control module; obtaining the change in image distance according to the position of the cooled camera and the temperature at the cooled camera through a control module; adjusting the position of the backlight assembly according to the change in image distance through a control module; and then capturing an image of the backlight assembly through the cooled camera to perform colorimetric detection on the backlight assembly. This achieves precise adjustment of the distance between the cooled camera lens and the backlight assembly, making image acquisition and detection more accurate.

[0050] Other features and advantages of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention are realized and obtained through the structures particularly pointed out in the description and the drawings.

[0051] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0052] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0053] Figure 1 A flowchart of a Mini LED colorimetric detection method provided in this disclosure embodiment;

[0054] Figure 2 A schematic diagram illustrating the principle of a Mini LED colorimetric detection method provided in this embodiment of the disclosure;

[0055] Figure 3 This is a schematic diagram of the structure of a Mini LED colorimetric detection device provided in an embodiment of the present disclosure;

[0056] Figure 4 This is a schematic diagram of the structure of a cooling camera provided in an embodiment of this disclosure.

[0057] In the picture:

[0058] 1 First moving mechanism, 2 Second moving mechanism, 3 Cooling camera, 4 Lens, 5 Lens bracket, 6 Conveyor belt, 7 Backlight assembly. Detailed Implementation

[0059] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0060] As used herein, the phrases “in one embodiment,” “according to one embodiment,” “in some embodiments,” etc., generally refer to the fact that a particular feature, structure, or characteristic following the phrase can be included in at least one embodiment of this disclosure. Therefore, a particular feature, structure, or characteristic can be included in more than one embodiment of this disclosure, such that these phrases do not necessarily refer to the same embodiment. As used herein, the terms “example,” “exemplary,” etc., 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 superior to other implementations, aspects, or designs. Rather, the use of the terms “example,” “exemplary,” etc., is intended to present concepts in a specific manner.

[0061] According to the group standard for general technical specifications of Mini-LED backlight components, 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 components of different sizes, the position of the image acquisition camera needs to be constantly adjusted. The inventors discovered that because Mini-LED backlight components generate heat after being lit, when the detection distance changes (e.g., 0.5m → 3m), the heat exchange rate between the camera housing and the environment changes, causing varying degrees of displacement between the lens bracket and the sensor substrate, thus altering the image distance of the camera. Related technologies use the method of moving the sensor substrate to compensate for displacement errors. However, the inventors found that for the detection of Mini-LED backlight components, moving the sensor substrate changes the cooling efficiency of the cooling camera, potentially leading to a surge in dark current. This is because if a movable sensor substrate is used, a fixed contact cooling method cannot be used, resulting in a significant decrease in cooling effect.

[0062] The shortcomings of the above solutions are the result of the inventor's practical experience and careful research. Therefore, the discovery process of the above problems and the solutions proposed in this disclosure should be considered as the inventor's contribution to this disclosure.

[0063] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0064] The following detailed description of some embodiments of the present invention is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0065] like Figure 1 As shown, at least one disclosed embodiment provides a Mini LED colorimetric detection method, including: adjusting the position of a cooled camera 3 according to the short side length of a backlight assembly 7 using a control module; obtaining the change in image distance based on the position of the cooled camera 3 and the temperature at the cooled camera 3 using the control module; adjusting the position of the backlight assembly 7 according to the change in image distance using the control module; and then capturing an image of the backlight assembly 7 using the cooled camera 3 to perform colorimetric detection on the backlight assembly 7. This achieves precise adjustment of the distance between the lens 4 of the cooled camera 3 and the backlight assembly 7, making image acquisition and detection more accurate.

[0066] In this embodiment, the backlight component 7 is a Mini LED backlight component.

[0067] In this embodiment, the backlight assembly 7 is moved to compensate for the change in image distance caused by temperature, thus avoiding changes in the cooling efficiency of the cooled camera 3 caused by moving the sensor substrate. This prevents a potential surge in dark current and ensures more accurate subsequent image acquisition and detection.

[0068] like Figure 4 As shown, in an optional embodiment, the method of obtaining the change in image distance by the control module based on the position of the cooled camera 3 and the temperature at the cooled camera 3 includes: calculating the thermal expansion deformation of the lens bracket 5 based on the current temperature of the lens bracket 5 of the cooled camera 3 at the current distance between the lens 4 of the cooled camera 3 and the backlight assembly 7.

[0069] ΔV 1 =CTE 1 ·L 1 ·ΔT 1 ;

[0070] in, ΔV 1 The thermal expansion deformation of lens bracket 5 is expressed in mm. CTE 1 The coefficient of thermal expansion of the lens bracket 5; L 1 The length of lens support 5 at a preset standard temperature is in mm. ΔT 1 The temperature difference between the current temperature of lens bracket 5 and the preset standard temperature, in °C;

[0071] The current temperature of the lens bracket 5 is the ambient temperature at the cooling camera 3; the image distance is the distance between the lens 4 of the cooling camera 3 and the sensor substrate in the cooling camera 3.

[0072] like Figure 2 As shown, in this embodiment, a temperature sensor can be installed on the cooling camera 3. The temperature sensor is electrically connected to the control module. The temperature at the cooling camera 3 is detected by the temperature sensor, and this temperature is the current temperature of the lens bracket 5.

[0073] In this embodiment, the lens bracket 5 is made of aluminum. CTE 1 The specific parameters are 23×10 -6 / ℃.

[0074] In an optional implementation, the method of obtaining the change in image distance by the control module based on the position of the cooled camera 3 and the temperature at the cooled camera 3 further includes:

[0075] The control module obtains the thermal expansion deformation of the sensor substrate based on the current temperature of the sensor substrate in the cooled camera 3, given the current distance between the lens 4 and the backlight assembly 7 of the cooled camera 3.

[0076] ΔV 2 =CTE 2 ·L 2 ·ΔT 2 ;

[0077] in, ΔV 2 This represents the thermal expansion deformation of the sensor substrate, in mm. CTE 2 The coefficient of thermal expansion of the sensor substrate; L 2 The length of the sensor substrate at a preset standard temperature, in mm; ΔT 2This represents the temperature difference between the current temperature of the sensor substrate and the preset standard temperature, expressed in °C.

[0078] The internal temperature of the cooled camera 3 is the current temperature of the sensor substrate;

[0079] The change in image distance is obtained through the control module:

[0080] Δv=ΔV 1 - ΔV 2 ;

[0081] in, Δv This represents the change in image distance, expressed in mm.

[0082] In this embodiment, the sensor substrate is made of silicon. CTE 2 The specific parameters are 2.6 × 10 -6 / ℃.

[0083] In this embodiment, the sensor substrate is disposed inside the cooled camera 3, and an image sensor is disposed on the sensor substrate to acquire an image of the backlight component 7 when the backlight component 7 is lit, so as to facilitate subsequent detection of the color of the backlight component 7.

[0084] In this embodiment, a temperature sensor is also provided inside the cooling camera 3. The temperature sensor is electrically connected to the control module. The temperature sensor detects the temperature inside the cooling camera 3, which is the current temperature of the sensor substrate.

[0085] In one optional implementation, the method of adjusting the position of the backlight assembly 7 by the control module according to the change in image distance includes: obtaining the object distance adjustment amount by the control module according to the change in image distance.

[0086] ;

[0087] in, Thu This is the object distance adjustment amount, in mm; f The focal length of lens 4 in camera 3 is in mm; v 0 This is the initial image distance, in mm;

[0088] 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 move the backlight assembly 7 by the distance corresponding to the object distance adjustment, thereby completing the position adjustment of the backlight assembly 7.

[0089] In this embodiment, the focal length of the lens 4 of the cooled camera 3 is... fThese are the factory parameters for the cooled camera 3; the initial image distance is the distance between the lens 4 and the image sensor on the sensor substrate, which is also the factory parameter for the cooled camera 3.

[0090] In one optional implementation, the method of adjusting the position of the cooling camera 3 by the control module according to the short side length of the backlight assembly 7 includes: the control module controlling the second moving mechanism 2 to move the cooling camera 3 according to the short side length of the backlight assembly 7, i.e.

[0091] 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 move the cooling camera 3, so that the distance between the lens 4 of the cooling camera 3 and the backlight assembly 7 reaches the first preset distance, which is the current distance between the lens 4 of the cooling camera 3 and the backlight assembly 7.

[0092] When the shorter side of the backlight assembly 7 is longer than a preset length, the control module controls the second moving mechanism 2 to move the cooling camera 3, so that the distance between the lens 4 of the cooling camera 3 and the backlight assembly 7 reaches a preset multiple of the shorter side 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.

[0093] In this embodiment, the preset length is 0.2m, or 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, or 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.

[0094] Specifically, the current distance is 750mm, and the coefficient of thermal expansion of the lens bracket 5 is 23×10⁻⁶. -6 / ℃, the length of lens bracket 5 at the preset standard temperature is 50mm, the temperature difference between the current temperature of lens bracket 5 and the preset standard temperature is 10 degrees Celsius, and the coefficient of thermal expansion 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 cooled camera 3 is 50mm, and the initial image distance is 52mm.

[0095] ΔV 1 =23×10 -6 ／℃·50·10=1.15×10 -2 mm?

[0096] ΔV 2=2.6×10 -6 ／℃·20·5=2.6×10 -4 mm?

[0097] Δv=1.15×10 -2 －2.6×10 -4 =1.124×10 -2 mm?

[0098] ;

[0099] The control module can also obtain the new object distance based on the object distance adjustment amount: u=u 0 +Du ;in u For the new object distance, u=750－ 7.025=742.975mm A distance sensor can be installed on the cooled 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 cooled 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 obtains the distance in real time, thereby realizing the 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.

[0100] In this embodiment, the first moving mechanism 1 can be 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 move the backlight assembly 7 according to the object distance adjustment amount to meet the requirements of subsequent accurate detection.

[0101] In this embodiment, when the object distance adjustment is a positive number, the first moving mechanism 1 drives the backlight assembly 7 to approach the lens 4.

[0102] At least one other disclosed embodiment also provides a Mini LED colorimetric detection system, comprising: a coarse adjustment module configured to adjust the position of a cooled camera 3 according to the short side length of a backlight assembly 7; a change acquisition module configured to acquire the change in image distance based on the position of the cooled camera 3 and the temperature at the cooled camera 3; and an adjustment module configured to adjust the position of the backlight assembly 7 according to the change in image distance.

[0103] In this embodiment, the above-mentioned module can be a virtual module, and its functions can be integrated into the control module.

[0104] At least one other disclosed embodiment also provides a computer-readable storage medium having a computer program / instructions stored thereon that, when executed by a processor, implements the steps of the Mini LED colorimetric detection method described above.

[0105] At least one other disclosed embodiment also provides a computer program product, including a computer program / instructions that, when executed by a processor, implement the steps of the Mini LED colorimetric detection method described above.

[0106] like Figure 3 As shown, at least one other disclosed embodiment also provides a Mini LED colorimetric detection device, including: a control module, and a cooled camera 3, a first moving mechanism 1, and a second moving mechanism 2 electrically connected to the control module; the cooled camera 3 is disposed on the second moving mechanism 2; the first moving mechanism 1 is disposed below the backlight assembly 7, and the cooled camera 3 is disposed above the backlight assembly 7; the control module is configured to use the above-described Mini LED colorimetric detection method to control the first moving mechanism 1 to drive the backlight assembly 7 to rise and fall, and to control the second moving mechanism 2 to drive the cooled camera 3 to rise and fall, so as to adjust the distance between the cooled camera 3 and the backlight assembly 7.

[0107] In one optional embodiment, the control module is electrically connected to a pair of conveyor belts 6, and the first moving mechanism 1 is disposed between the two conveyor belts 6 and located below the cooling camera 3; a backlight assembly 7 is mounted 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 below the cooling 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.

[0108] In this embodiment, after the conveyor belt 6 moves the backlight assembly 7 below the cooling 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 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 needs of the backlight assembly 7 to lower.

[0109] In this embodiment, after 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 move the cooling camera 3 so that the current distance between the lens 4 and the backlight assembly 7 meets the corresponding requirements.

[0110] In summary, this Mini LED colorimetric detection method includes: adjusting the position of the cooled camera 3 according to the short side length of the backlight assembly 7 using a control module; obtaining the change in image distance based on the position of the cooled camera 3 and the temperature at the cooled camera 3 using a control module; adjusting the position of the backlight assembly 7 based on the change in image distance using a control module; and then capturing an image of the backlight assembly 7 using the cooled camera 3 to perform colorimetric detection on the backlight assembly 7. This achieves precise adjustment of the distance between the lens 4 of the cooled camera 3 and the backlight assembly 7, resulting in more accurate image acquisition and detection.

[0111] The disclosures and other solutions, examples, embodiments, modules, and functional operations described in this document can be implemented in digital electronic circuits, or computer software, firmware, or hardware, including the structures disclosed in this document and their structural equivalents, or combinations thereof. The disclosures 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 for controlling the operation of a data processing apparatus. The computer-readable medium can be a machine-readable storage device, a machine-readable storage substrate, a storage device, a material composition that influences machine-readable propagated signals, or a combination thereof. In addition to hardware, the apparatus may 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 thereof. The propagated signals are artificially generated signals, such as machine-generated electrical, optical, or electromagnetic signals, which are generated to encode information for transmission to a suitable receiver device.

[0112] Computer programs (also known as programs, software, software applications, scripts, or code) can be written in any programming language (including compiled or interpreted languages) and can be deployed in any form, including as standalone programs or as modules, components, subroutines, or other units suitable for use in a computing environment. A computer program does not necessarily correspond to a file in a file system. A program can 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 that program, or in multiple coordinating files (e.g., a file storing one or more modules, subroutines, or portions of code). Computer programs can be deployed and executed on one or more computers located at a single site or distributed across multiple sites interconnected by a communication network.

[0113] The processing and logic flows described in this document can be executed by one or more programmable processors that execute one or more computer programs to perform functions by manipulating input data and generating outputs. The processing and logic flows can also be executed by special-purpose logic circuitry, and the devices can be implemented as special-purpose logic circuitry, such as FPGAs (Field-Programmable Gate Arrays) or ASICs (Application-Specific Integrated Circuits).

[0114] 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, the processor receives instructions and data from read-only memory or random access memory, or both. The basic components of a computer are a processor that executes instructions and one or more storage devices that store the instructions and data. Typically, a computer will also include one or more mass storage devices for storing data, such as magnetic disks, magneto-optical disks, or optical disks, or operatively coupled to receive data from or transfer data to mass storage devices, or both. However, a computer does not necessarily have such devices. Computer-readable media suitable for storing computer program instructions and data include all forms of non-volatile memory, media, and memory 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 optical disc read-only memory (CD ROM) and digital versatile optical disc read-only memory (DVD-ROM). The processor and memory may be supplemented by dedicated logic circuitry or incorporated into dedicated logic circuitry.

[0115] While 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 this disclosure. The present examples are intended to be illustrative rather than restrictive and are not 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.

[0116] In the several embodiments provided herein, it should be understood that the disclosed apparatus and methods can also be implemented in other ways. The apparatus embodiments described above are merely illustrative; for example, the flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods, and computer program products according to various embodiments of the present invention. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions marked in the blocks may occur in a different order than those marked in the drawings. For example, two consecutive blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in a block diagram and / or flowchart, and combinations of blocks in block diagrams and / or flowcharts, can be implemented using a dedicated hardware-based system that performs the specified function or action, or using a combination of dedicated hardware and computer instructions.

[0117] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A method for detecting the colorimetry of a Mini LED, characterized in that, include: The position of the cooling camera (3) is adjusted by the control module according to the short side length of the backlight assembly (7); The control module obtains the change in image distance based on the position of the cooling camera (3) and the temperature at the cooling camera (3); The position of the backlight assembly (7) is adjusted by the control module according to the change in 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 of adjusting the position of the cooling camera (3) by the control module according to the short side length of the backlight assembly (7) includes: The control module controls the second moving mechanism (2) to move the cooling camera (3) based on the short side length of the backlight assembly (7), i.e. 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 move the cooling camera (3) so that the distance between the lens (4) of the cooling camera (3) and the backlight assembly (7) reaches the first preset distance. The first preset distance is the current distance between the lens (4) of the cooling camera (3) and the backlight assembly (7). When the short side of the backlight assembly (7) is longer than the preset length, the control module controls the second moving mechanism (2) to move the cooling camera (3) 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 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). The method for obtaining the change in image distance by means of the control module based on the position of the cooling camera (3) and the temperature at the cooling camera (3) includes: The thermal expansion deformation of the lens bracket (5) is calculated by the control module based on the current temperature of the lens bracket (5) of the cooled camera (3) at the current distance between the lens (4) of the cooled camera (3) and the backlight assembly (7): ΔV 1 =CTE 1 ·L 1 ·ΔT 1 ； in, ΔV 1 The thermal expansion deformation of the lens bracket (5); CTE 1 The coefficient of thermal expansion of the lens bracket (5); L 1 The length of the lens support (5) at a preset standard temperature; ΔT 1 The temperature difference between the current temperature and the preset standard temperature of the lens bracket (5); The current temperature of the lens bracket (5) is the ambient temperature at the cooling camera (3); The image distance is the distance between the lens (4) of the cooled camera (3) and the sensor substrate in the cooled camera (3); The method of adjusting the position of the backlight assembly (7) by the control module according to the change in image distance includes: The object distance adjustment amount is obtained by the control module based on the change in image distance: ； in, Δu This is the object distance adjustment amount; f The focal length of the lens (4) of the cooling camera (3); v 0 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 move the backlight assembly (7) by the distance corresponding to the object distance adjustment, thereby completing the position adjustment of the backlight assembly (7).

2. The Mini LED colorimetric detection method as described in claim 1, characterized in that: The method for obtaining the change in image distance by means of the control module based on the position of the cooling camera (3) and the temperature at the cooling camera (3) further includes: The thermal expansion deformation of the sensor substrate is obtained by the control module based on the current temperature of the sensor substrate in the cooling camera (3) at the current distance between the lens (4) of the cooling camera (3) and the backlight assembly (7): ΔV 2 =CTE 2 ·L 2 ·ΔT 2 ； in, ΔV 2 The thermal expansion deformation of the sensor substrate; CTE 2 The coefficient of thermal expansion of the sensor substrate; L 2 The length of the sensor substrate at a preset standard temperature; ΔT 2 This is the temperature difference between the current temperature of the sensor substrate and the preset standard temperature. The internal temperature of the cooled camera (3) is the current temperature of the sensor substrate; The change in image distance is obtained through the control module: Δv=ΔV 1 - ΔV 2 ； in, Δv This represents the change in image distance.

3. A Mini LED colorimetric detection system employing the Mini LED colorimetric detection method as described in claim 1 or claim 2, characterized in that, include: A coarse adjustment module is configured to adjust the position of the cooled camera (3) according to the short side length of the backlight assembly (7); The change acquisition module is configured to acquire the change in image distance based on the position of the cooling camera (3) and the temperature at the cooling camera (3); The adjustment module is configured to adjust the position of the backlight assembly (7) according to the change in image distance.

4. A computer-readable storage medium having a computer program stored thereon, characterized in that, When executed by a processor, the computer program implements the steps of the Mini LED colorimetric detection method as described in claim 1 or claim 2.

5. A computer program product, comprising a computer program, characterized in that, When executed by a processor, the computer program implements the steps of the Mini LED colorimetric detection method as described in claim 1 or claim 2.

6. A Mini LED colorimetric detection device, characterized in that, include: The control module, and the cooling camera (3), the first moving mechanism (1), and the second moving mechanism (2) electrically connected to the control module; The cooling camera (3) is mounted on the second moving mechanism (2); The first moving mechanism (1) is located below the backlight assembly (7), and the cooled camera (3) is located above the backlight assembly (7); The control module is configured to use the Mini LED colorimetric detection method as described in claim 1 or claim 2 to control the first moving mechanism (1) to drive the backlight assembly (7) to rise and fall, and to 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).

7. The Mini LED colorimetric detection device as described in claim 6, characterized in that: The control module is electrically connected to a pair of conveyor belts (6), and the first moving mechanism (1) is disposed between the two conveyor belts (6) and is located below the cooling camera (3). A backlight assembly (7) is installed between two conveyor belts (6). The control module is configured to control the two conveyor belts (6) to work synchronously to transport the backlight assembly (7) to below the cooling camera (3). At this 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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