Method for filtering dirt at bottom of liquid crystal panel after partial pasting, imaging device and medium

Abstract

The invention provides a method for filtering dirt at the bottom of a liquid crystal panel after partial pasting, an imaging device and a medium, and the method comprises the following steps: lighting and imaging the bottom of the liquid crystal panel through a side light source, and obtaining a visible light boundary image; the pixel boundary of the display area of the liquid crystal panel is lightened and imaged through a backlight source, and an infrared light boundary image is obtained; determining the boundary through the infrared light boundary image, and judging the relative position of the dirt in combination with the visible light boundary image; and synchronizing the position information of the dirt to a defect detection station so as to confirm the position of the dirt when the station is imaged, and carrying out imaging filtering on the dirt. According to the invention, the filtering efficiency of the dirt at the bottom of the liquid crystal panel after partial pasting is improved, the influence of the dirt at the bottom on lighting imaging of the liquid crystal panel after partial pasting is reduced, and the detection precision is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of liquid crystal panel dirt detection, and particularly to a method for filtering bottom dirt of a liquid crystal panel after partial lamination, an imaging device and a medium. Background Art

[0002] After partial lamination, the liquid crystal panel is opaque. During normal defect detection, there is a lighting image for filtering dirt and foreign matters (including dirt and dust, etc.) on the surface of the liquid crystal panel. However, the bottom dirt of the liquid crystal panel is imaged in the lighting-on image but not in the lighting image. When there is dirt at the bottom of the liquid crystal panel, the dirt will block the light of the backlight, resulting in abnormal brightness at the corresponding position, thus affecting the screen lighting and imaging. Since the bottom dirt cannot be filtered from the surface, it is necessary to filter the bottom dirt separately to eliminate the imaging interference of the dirt. Summary of the Invention

[0003] To achieve the above objects and other advantages of the present invention, the first object of the present invention is to provide a method for filtering bottom dirt of a liquid crystal panel after partial lamination, comprising the following steps:

[0004] Light up and image the bottom of the liquid crystal panel through a side light source to obtain a visible light boundary image;

[0005] Light up and image the pixel boundaries of the display area of the liquid crystal panel through a backlight source to obtain an infrared light boundary image;

[0006] Determine the boundary through the infrared light boundary image, and combine the visible light boundary image to determine the relative position of the dirt;

[0007] Synchronize the position information of the dirt to the defect detection station to confirm the position of the dirt when imaging at this station, and perform imaging filtering of the dirt.

[0008] Further, the step of determining the boundary through the infrared light boundary image includes:

[0009] Grab the black border of the infrared light boundary image as the boundary through a grayscale card control;

[0010] Perform region of interest processing with the four vertices of the border as the corners.

[0011] Further, the step of combining the visible light boundary image to determine the relative position of the dirt includes:

[0012] Take one of the corners of the boundary as the origin, and perform coordinate positioning of the dirt through the image resolution.

[0013] Further, it further includes the step of:

[0014] Calculate the size of the dirt and the gray level difference from the background.

[0015] Further, the step of synchronizing the position information of the dirt to the defect detection station to confirm the position of the dirt when imaging at this station and performing imaging filtering of the dirt includes:

[0016] Perform dirt positioning according to the position information of the dirt and the resolution of the dirt filtering station;

[0017] Calculate the position of the dirt when imaging at this station based on the dirt positioning result and the resolution of the defect detection station.

[0018] The second object of the present invention is to provide a bottom dirt filtering imaging device for a liquid crystal panel after offset lamination, which is used to realize visible light boundary imaging and infrared light boundary imaging in the above method, and includes an image acquisition device, a backlight source, a side light source, a light source control device, and a light source fixing device; wherein,

[0019] The backlight source is used to illuminate the pixel boundary of the display area of the liquid crystal panel to meet the positioning requirements;

[0020] The side light source is used to illuminate the dirt at the bottom of the liquid crystal panel;

[0021] The light source control device is used to control the on / off and brightness adjustment of the backlight source and the side light source;

[0022] The light source fixing device is used to adjust the height and angle of the backlight source and the side light source;

[0023] The image acquisition device is used to image when the side light source is turned on to obtain a visible light boundary image, and to image when the backlight source is turned on to obtain an infrared light boundary image.

[0024] Further, the backlight source uses the infrared light band.

[0025] Further, the image acquisition device adopts a camera and a lens, and the camera is connected to the lens.

[0026] Further, the camera and the lens are placed directly above the product and are perpendicular to the product;

[0027] The backlight source is opposite to the surface of the liquid crystal panel;

[0028] The side light source is installed around the product, and the light source control device is used to realize independent control of each side light source.

[0029] The third object of the present invention is to provide a computer-readable storage medium, on which program instructions are stored, and when the program instructions are executed by a processor, the above method is realized.

[0030] Compared with the prior art, the beneficial effects of the present invention are:

[0031] The present invention provides a method for filtering bottom dirt of a liquid crystal panel after partial lamination, an imaging device, and a medium. The method includes the following steps: illuminating the bottom of the liquid crystal panel with a side light source to obtain a visible light boundary image; illuminating the pixel boundaries of the display area of the liquid crystal panel with a backlight source to obtain an infrared light boundary image; determining the boundary through the infrared light boundary image, and combining the visible light boundary image to determine the relative position of the dirt; synchronizing the position information of the dirt to a defect detection station to confirm the position of the dirt when imaging at this station, and performing imaging filtering of the dirt. The present invention improves the filtering efficiency of the bottom dirt of the liquid crystal panel after partial lamination, reduces the influence of the bottom dirt on the lighting and imaging of the liquid crystal panel after partial lamination, and improves the detection accuracy.

[0032] The above description is only an overview of the technical solution of the present invention. In order to be able to understand the technical means of the present invention more clearly and implement it according to the content of the specification, the following takes the preferred embodiments of the present invention and combines the drawings to describe in detail as follows. The specific implementation manners of the present invention are given in detail by the following embodiments and their accompanying drawings. Description of the Drawings

[0033] The drawings described herein are used to provide a further understanding of the present invention, and constitute a part of this application. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0034] Figure 1 It is a schematic diagram of an imaging device for filtering bottom dirt of a liquid crystal panel after partial lamination;

[0035] Figure 2 It is an infrared light boundary image;

[0036] Figure 3 It is a visible light boundary image;

[0037] Figure 4 It is a flowchart of a method for filtering bottom dirt of a liquid crystal panel after partial lamination;

[0038] Figure 5 It is a schematic diagram of an electronic device;

[0039] Figure 6 It is a schematic diagram of a storage medium.

[0040] In the figure: 1, image acquisition device; 2, backlight source; 3, side light source; 4, liquid crystal panel. Detailed Description of the Preferred Embodiments

[0041] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. It should be noted that, under the premise of no conflict, the embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

[0042] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present invention.

[0043] The figure numbers in this application are only used to distinguish the various steps in the scheme, and are not used to limit the execution order of the various steps. The specific execution order is subject to the description in the specification.

[0044] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0045] Example 1

[0046] A bottom dirt filtering imaging device for a rear LCD panel, such as Figure 1 As shown, it includes an image acquisition device 1, a backlight source 2, a side light source 3, a light source control device, and a light source fixing device; wherein,

[0047] The backlight source is used to illuminate the pixel boundaries of the display area of ​​the liquid crystal panel 4 to meet the positioning requirements;

[0048] The side light source has a certain directionality and is used to illuminate the dirt on the bottom of the liquid crystal panel;

[0049] The light source control device is used to control the on / off and brightness adjustment of the backlight source and the side light source;

[0050] The light source fixing device is used for adjusting the height and angle of the backlight source and the side light source;

[0051] The image acquisition device is used to form an image when the side light source is illuminated to obtain a visible light boundary image, and to form an image when the backlight source is illuminated to obtain an infrared light boundary image.

[0052] In some embodiments, the backlight source uses an infrared light band, taking advantage of the high penetrability of infrared light wavelengths to illuminate the pixel boundaries of the display area of ​​the liquid crystal panel to meet positioning requirements.

[0053] In some embodiments, the image acquisition device includes a camera and a lens, and the camera is connected to the lens.

[0054] Further, the camera and the lens are placed directly above the product and perpendicular to the product;

[0055] The backlight is opposite to the surface of the liquid crystal panel;

[0056] The side light sources are installed around the product, and the light source control device is used to independently control each side light source.

[0057] There is a certain height distance between the above light sources and the product, and the angles of the light sources are adjustable to adjust the lighting uniformity. The connection wires of the light sources are connected to the light source control device.

[0058] In some embodiments, the front and back sides of the product are determined during feeding, and the product for bottom dirt filtering detection comes in the state after offset pasting. After the product is detected at the previous station, the manipulator grabs or the suction cup adsorbs and flips it to flip the offset liquid crystal panel so that the bottom of the liquid crystal panel faces the camera and the surface of the liquid crystal panel faces the backlight for photographing.

[0059] The imaging device needs to take two photos. The first is the imaging with side light sources on. The side light sources illuminate the dirt and dust and other interferences at the bottom of the liquid crystal panel to make them bright for imaging, so as to clarify the positions where the interferences are located. The obtained visible light boundary image is as Figure 3 shown; the second is the imaging with the backlight on. The infrared light of the backlight illuminates the boundaries of the pixels in the display area (visible light cannot clearly illuminate the inside of the product, and the boundary imaging is poor) to meet the requirements of algorithm positioning. The obtained infrared light boundary image is as Figure 2 shown, Figure 2 where the black border in

[0060] is the boundary. Taking one corner of the boundary as the origin, the coordinates of the dirt are located through the picture resolution. For example, assuming the imaging resolution is 5400×3600 and the boundary origin is the same as the picture origin, if the dirt is located at the center of the picture, the coordinates where the dirt is located are (2700,1800). After confirming the position where the dirt is located and the imaging state through the imaging device, the position information is synchronized to the defect detection station. The defect detection station confirms the position of the dirt during imaging at this station according to the position information transmitted back by the dirt filtering station to perform imaging filtering of the dirt and reduce the risk of imaging passing the inspection.

[0061] The imaging resolutions of the above two stations are different, so calculations need to be performed according to the positioning results and the resolution differences. For example, the resolution of the dirt filtering station is 5400×3600 and the dirt coordinates are (2700,1800), then the dirt is at the center (1 / 2 position) of the imaging. Assuming the resolution of the defect detection station is 14000×10000 and the dirt is at the center of the imaging, the calculated coordinates can be (7000×5000).

[0062] This embodiment provides a bottom dirt filtering imaging device for a liquid crystal panel after partial pasting. The device includes an image acquisition device, a backlight source, a side light source, a light source control device, and a light source fixing device. Among them, the backlight source is used to illuminate the pixel boundaries of the display area of the liquid crystal panel to meet the positioning requirements. The side light source is used to illuminate the dirt at the bottom of the liquid crystal panel. The light source control device is used to control the turning on and off and brightness adjustment of the backlight source and the side light source. The light source fixing device is used to adjust the height and angle of the backlight source and the side light source. The image acquisition device is used to image when the side light source emits light to obtain a visible light boundary image, and to image when the backlight source emits light to obtain an infrared light boundary image. This embodiment improves the filtering efficiency of the dirt at the bottom of the liquid crystal panel after partial pasting, reduces the influence of the bottom dirt on the lighting and imaging of the liquid crystal panel after partial pasting, and improves the detection accuracy.

[0063] Embodiment 2

[0064] A method for filtering the bottom dirt of a liquid crystal panel after partial pasting uses the imaging device provided in Embodiment 1 to perform visible light boundary imaging and infrared light boundary imaging. For the detailed description of the imaging device provided in Embodiment 1, reference can be made to the corresponding description in the above imaging device embodiment, which will not be elaborated here. As Figure 1 、 Figure 4 shown, the method includes the following steps:

[0065] S1. Illuminate and image the bottom of the liquid crystal panel through the side light source to obtain a visible light boundary image;

[0066] In some embodiments, the front and back sides of the product are determined when the product is loaded, and the product for bottom dirt filtering detection comes in the state after partial pasting. After the product is detected at the previous station, the manipulator grabs or the suction cup adsorbs and flips to flip the liquid crystal panel after partial pasting so that the bottom of the liquid crystal panel faces the camera and the surface of the liquid crystal panel faces the backlight source for taking pictures.

[0067] S2. Illuminate and image the pixel boundaries of the display area of the liquid crystal panel through the backlight source to obtain an infrared light boundary image;

[0068] The above imaging device needs to take pictures twice. The first time is the imaging when the side light source emits light. The side light source illuminates and images the dirt and dust and other interferences at the bottom of the liquid crystal panel to clarify the positions corresponding to the interferences, and the obtained visible light boundary image is as Figure 3 shown; the second time is the imaging when the backlight source emits light. The infrared light of the backlight source illuminates the boundaries of the pixels in the display area (visible light cannot clearly illuminate the inside of the product, and the boundary imaging is poor) to meet the requirements of algorithm positioning, and the obtained infrared light boundary image is as Figure 2 shown, Figure 2 The black border in is the boundary.

[0069] In some embodiments, the step of determining the boundary through the infrared light boundary image includes:

[0070] Grabbing the black border of the infrared light boundary image through gray-scale card control as the boundary; as Figure 2 shown, the area inside the border is the display area with a higher gray scale, while the border has a lower gray scale. The border is grabbed by setting a gray-scale threshold;

[0071] Performing region of interest processing with the four vertices of the border as the corners, and the vertices are the four extreme coordinates in the XY directions of the border.

[0072] S3. Determine the boundary through the infrared light boundary image, and combine the visible light boundary image to determine the relative position of the dirt;

[0073] In some embodiments, the step of combining the visible light boundary image to determine the relative position of the dirt includes:

[0074] Taking one of the corners of the boundary as the origin, and performing coordinate positioning of the dirt through the image resolution.

[0075] For example, assuming the imaging resolution is 5400×3600, the boundary origin is the same as the picture origin, and the dirt is located at the center of the picture, then the coordinates where the dirt is located are (2700, 1800).

[0076] In some embodiments, it further includes the step of confirming the imaging state:

[0077] Calculating the size (pixel ratio) of the dirt and the gray-scale difference from the background.

[0078] S4. Synchronize the position information of the dirt to the defect detection station to confirm the position of the dirt when imaging at this station, and perform imaging filtering of the dirt.

[0079] That is, the defect detection station confirms the position of the dirt when imaging at this station according to the position information transmitted back by the dirt filtering station to perform imaging filtering of the dirt, reducing the risk of passing the inspection during imaging. Among them, the vertices of the image after region of interest processing at the defect detection station are the four vertices of the border, and the principle of vertex grabbing is the same as that at the dirt filtering station, which can be referred to the above description and will not be elaborated here. The relative position of dirt taking pictures is the same, only the picture resolution is different.

[0080] Since the imaging resolutions of the two stations are different, calculations need to be performed according to the positioning results and resolution differences. Further, the step of synchronizing the position information of the dirt to the defect detection station to confirm the position of the dirt when imaging at this station and perform imaging filtering of the dirt includes:

[0081] Locate the dirt according to the dirt position information and the resolution of the dirt filtering station;

[0082] Based on the dirt location result and the resolution of the defect detection station, calculate the position of the dirt when imaging at this station.

[0083] For example, if the resolution of the dirt filtering station is 5400×3600 and the dirt coordinates are (2700,1800), then the dirt is at the center (1 / 2 position) of the image. If the resolution of the defect detection station is 14000×10000 and the dirt is at the center of the image, the coordinates can be calculated as (7000×5000).

[0084] After the defect detection station locates the dirt, if the product lights up the screen and captures the dirt image at the position corresponding to the dirt, then define this dirt as interference and filter it.

[0085] This embodiment provides a method for filtering bottom dirt of a liquid crystal panel after partial sticking. The method includes the following steps: illuminate the bottom of the liquid crystal panel through a side light source to obtain a visible light boundary image; illuminate the pixel boundaries of the display area of the liquid crystal panel through a backlight source to obtain an infrared light boundary image; determine the boundary through the infrared light boundary image, and combine the visible light boundary image to determine the relative position of the dirt; synchronize the position information of the dirt to the defect detection station to confirm the position of the dirt when imaging at this station, and perform imaging filtering of the dirt. This embodiment improves the filtering efficiency of the bottom dirt of the liquid crystal panel after partial sticking, reduces the influence of the bottom dirt on the lighting and imaging of the liquid crystal panel after partial sticking, and improves the detection accuracy.

[0086] Embodiment 3

[0087] An electronic device, as Figure 5 shown, includes: a memory on which program code is stored; a processor connected to the memory, and when the program code is executed by the processor, a method for filtering bottom dirt of a liquid crystal panel after partial sticking is implemented. For a detailed description of the method, reference can be made to the corresponding description in the above method embodiment, which will not be elaborated here.

[0088] Embodiment 4

[0089] A computer-readable storage medium, as Figure 6 shown, on which program instructions are stored, and when the program instructions are executed by a processor, a method for filtering bottom dirt of a liquid crystal panel after partial sticking is implemented. For a detailed description of the method, reference can be made to the corresponding description in the above method embodiment, which will not be elaborated here.

[0090] The number of devices and the processing scale described here are used to simplify the description of the present invention. Applications, modifications, and variations of the present invention will be obvious to those skilled in the art.

[0091] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the embodiments. It can be fully applied to various fields suitable for the present invention. For those skilled in the art, additional modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details and the illustrated and described examples here.

[0092] The devices, electronic devices, non-volatile computer storage media, and methods provided in the embodiments of this specification are corresponding. Therefore, the devices, electronic devices, and non-volatile computer storage media also have beneficial technical effects similar to those of the corresponding methods. Since the beneficial technical effects of the methods have been described in detail above, the beneficial technical effects of the corresponding devices, electronic devices, and non-volatile computer storage media will not be elaborated here.

[0093] Those skilled in the art also know that in addition to implementing the controller in the form of pure computer-readable program code, the method steps can be logically programmed to enable the controller to be implemented in the form of logic gates, switches, application-specific integrated circuits, programmable logic controllers, embedded microcontrollers, etc. to achieve the same functions. Therefore, such a controller can be regarded as a hardware component, and the devices included therein for implementing various functions can also be regarded as the structures within the hardware component. Or even, the devices for implementing various functions can be regarded as either software units for implementing the method or structures within the hardware component.

[0094] The systems, devices, or units illustrated in the above embodiments can be specifically implemented by computer chips or entities, or by products with certain functions. For the convenience of description, when describing the above devices, they are divided into various units according to their functions for separate description. Of course, when implementing one or more embodiments of this specification, the functions of each unit can be implemented in the same or multiple software and / or hardware.

[0095] Those skilled in the art should understand that the embodiments of this specification can be provided as methods, systems, or computer program products. Therefore, the embodiments of this specification can take the form of completely hardware embodiments, completely software embodiments, or embodiments combining software and hardware aspects. Moreover, the embodiments of this specification can take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk memories, CD-ROMs, optical memories, etc.) containing computer-usable program code.

[0096] This specification is described with reference to the flowcharts and / or block diagrams of methods, apparatuses (systems), and computer program products according to embodiments of the specification. It should be understood that each flow and / or block in the flowcharts and / or block diagrams, and combinations of flows and / or blocks in the flowcharts and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to the processors of general-purpose computers, special-purpose computers, embedded processors, or other programmable data processing devices to generate a machine, such that the instructions executed by the processors of the computer or other programmable data processing devices produce means for implementing the functions specified in the Figure 1 one or more flows and / or blocks Figure 1 one or more blocks

[0097] These computer program instructions can also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to work in a specific manner, such that the instructions stored in the computer-readable memory produce a manufactured article including instruction means that implement the functions specified in the Figure 1 one or more flows and / or blocks Figure 1 one or more blocks

[0098] These computer program instructions can also be loaded onto a computer or other programmable data processing device, such that a series of operation steps are executed on the computer or other programmable device to generate a computer-implemented process, and thus the instructions executed on the computer or other programmable device provide steps for implementing the functions specified in the Figure 1 one or more flows and / or blocks Figure 1 one or more blocks

[0099] It should also be noted that the term "comprising", "including" or any other variation thereof is intended to cover non-exclusive inclusion, such that a process, method, commodity or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, commodity or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, commodity or device including the said element.

[0100] This specification can be described in the general context of computer-executable instructions executed by a computer, such as program units. Generally, program units include routines, programs, objects, components, data structures, etc. that perform specific tasks or implement specific abstract data types. The specification can also be practiced in a distributed computing environment where tasks are performed by remote processing devices connected through a communication network. In a distributed computing environment, program units can be located in local and remote computer storage media including storage devices.

[0101] Each embodiment in this specification is described in a progressive manner. For the same or similar parts among the embodiments, reference can be made to each other. Each embodiment focuses on the differences from other embodiments. In particular, for system embodiments, since they are basically similar to method embodiments, the description is relatively simple, and reference can be made to the corresponding parts of the method embodiments for relevant details.

[0102] The above is only for the embodiments of this specification and is not intended to limit one or more embodiments of this specification. For those skilled in the art, various changes and modifications can be made to one or more embodiments of this specification. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of one or more embodiments of this specification shall be included within the scope of the claims of one or more embodiments of this specification.

Claims

1. A method for filtering bottom dirt of a liquid crystal panel after partial sticking, characterized in that, It includes the following steps: Light up the bottom of the liquid crystal panel through a side light source for imaging to obtain a visible light boundary image; Light up the pixel boundaries of the display area of the liquid crystal panel through a backlight source for imaging to obtain an infrared light boundary image; Determine the boundary through the infrared light boundary image, and combine the visible light boundary image to determine the relative position of the dirt; Synchronize the position information of the dirt to the defect detection station to confirm the position of the dirt when imaging at this station, and perform imaging filtering of the dirt.

2. The bottom dirt filtering method for a liquid crystal panel after partial sticking as described in claim 1, characterized in that, The step of determining the boundary through the infrared light boundary image includes: Grab the black border of the infrared light boundary image through gray-scale card control as the boundary; Perform region of interest processing with the four vertices of the border as corners.

3. The bottom dirt filtering method for a liquid crystal panel after partial sticking according to claim 2, wherein, The step of combining the visible light boundary image to determine the relative position of the dirt includes: Take one corner of the boundary as the origin, and perform coordinate positioning of the dirt through the image resolution.

4. The bottom dirt filtering method for a liquid crystal panel after partial sticking according to claim 3, wherein, It also includes the step: Calculate the size of the dirt and the gray-scale difference from the background.

5. The bottom dirt filtering method for a liquid crystal panel after partial pasting according to claim 3, wherein The step of synchronizing the position information of the dirt to the defect detection station to confirm the position of the dirt when imaging at this station, and performing imaging filtering of the dirt includes: Perform dirt positioning according to the position information of the dirt and the resolution of the dirt filtering station; Calculate the position of the dirt when imaging at this station according to the dirt positioning result and the resolution of the defect detection station.

6. A bottom dirt filtering and imaging device for a liquid crystal panel after offset pasting, which is used to implement visible light boundary imaging and infrared light boundary imaging in the method described in any one of claims 1 to 5, and is characterized in that: It includes an image acquisition device, a backlight source, a side light source, a light source control device, and a light source fixing device; wherein, The backlight source is used to light up the pixel boundaries of the display area of the liquid crystal panel to meet the positioning requirements; The side light source is used to light up the dirt at the bottom of the liquid crystal panel; The light source control device is used to control the on / off and brightness adjustment of the backlight source and the side light source; The light source fixing device is used to adjust the height and angle of the backlight source and the side light source; The image acquisition device is used to image when the side light source is on to obtain a visible light boundary image, and image when the backlight source is on to obtain an infrared light boundary image.

7. The bottom dirt filtering and imaging device for a liquid crystal panel after partial pasting according to claim 6, characterized in that: The backlight source uses the infrared light band.

8. The bottom dirt filtering and imaging device for a liquid crystal panel after partial sticking according to claim 6, characterized in that: The image acquisition device uses a camera and a lens, and the camera is connected to the lens.

9. The bottom dirt filtering imaging device for a liquid crystal panel after partial sticking as described in claim 8, characterized in that: The camera and the lens are placed directly above the product and are perpendicular to the product; The backlight source is opposite to the surface of the liquid crystal panel; The side light source is installed around the product, and the light source control device is used to achieve independent control of each side light source.

10. A computer-readable storage medium, characterized in that, It stores program instructions, and when the program instructions are executed by a processor, the method described in any one of claims 1 to 5 is implemented.

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