A line scanning module for developing glass and a liquid crystal whole film image detection machine

Abstract

The application discloses a line scanning light module for developing glass and a liquid crystal whole-film image detection machine, and is used for detecting a developed line on the developing glass. The line scanning light module comprises a light source part, the light source part comprises a plurality of light emitting parts arranged side by side along a length direction, and the light emitting parts emit white light; a light guide part, the light guide part comprises a plurality of light guide circular tables, the plurality of light guide circular tables are arranged corresponding to the plurality of light emitting parts along an axial direction and are located on a light emitting side of the light emitting parts; and a light shielding sheet, the light shielding sheet is arranged at both ends of the light guide part in the length direction. The line scanning light module solves the problem that the light source provided by the line scanning light module in the prior art is not obvious after irradiating the developing glass, and the detection effect is poor.

Description

Technical Field

[0001] This invention relates to the field of liquid crystal display manufacturing technology, and in particular to a line scanning module for developing glass and a liquid crystal film image inspection machine. Background Technology

[0002] In the production of LCD screens, especially monochrome LCD screens, the transparent glass used for the entire film is developed into developing glass after the developing process, on which developing circuits are formed. These developing circuits can then be etched to form the desired circuitry. However, the developing circuits may exhibit etching defects due to foreign objects, scratches, or other reasons. These defects are typically inspected manually using a high-powered microscope to check the outline of the circuits on the developing glass, ensuring that only the first sample is of good quality before mass production on the assembly line. However, manual inspection is inefficient, usually taking 30-60 minutes to inspect a single piece of developing glass. Furthermore, the small field of view of a high-powered microscope makes it easy to miss defects when manually moving the glass. Additionally, visual fatigue, insufficient skills, and poor management can also lead to missed inspections. This results in a batch of defective products flowing into later processes, causing significant scrap. Therefore, an automated LCD film image inspection machine is needed for automatic inspection.

[0003] Conventional LCD image inspection machines typically use a monochromatic light source to illuminate the camera. However, the lines on the developing glass are extremely fine, with diameters as small as 7-10 μm, resulting in a massive amount of image data. Furthermore, the glass has a photosensitive emulsion layer; uneven coating after the developing process can cause thin-film interference. When ordinary monochromatic line scan light illuminates the surface of the developing glass, it produces large areas of black and white ripples, creating regions of varying brightness. Since the camera images the developing lines using grayscale, these black and white ripples are easily confused with the developing lines, thus compromising the integrity of the entire developing circuitry. Therefore, using existing LCD image inspection machines with monochromatic line scan light sources to inspect the developing lines is ineffective, leading to defective products causing material waste and labor losses.

[0004] Therefore, existing technologies still need to be improved and developed. Summary of the Invention

[0005] In view of the shortcomings of the prior art, the purpose of this invention is to provide a line scanning light module for developing glass and a liquid crystal film image inspection machine, so as to solve the problem that the light source provided by the line scanning light module in the prior art does not produce clear images after irradiating the developing glass, resulting in poor detection effect.

[0006] The technical solution of the present invention is as follows:

[0007] A line scanning module for developing glass, used to detect developing lines on developing glass, includes a light source unit, which includes a plurality of light-emitting elements arranged side by side along the length direction, the light-emitting elements emitting white light;

[0008] A light guide section, comprising multiple light guide truncated cones, which are arranged axially and corresponding to multiple light-emitting elements, and located on the light-emitting side of the light-emitting elements;

[0009] A light-shielding sheet is disposed at both ends of the light guide portion along its length.

[0010] Furthermore, the light source is a light strip, the light strip includes a light panel, the light-emitting element is an LED bead, and a plurality of the LED beads are disposed on the light panel; or

[0011] The light source includes an optical fiber and a light-emitting lamp located at the end of the optical fiber. The front end of the optical fiber serves as the light-emitting element and is disposed towards the light guide.

[0012] Furthermore, a light-blocking film is provided between adjacent light-guiding frustums.

[0013] Furthermore, when the light source unit uses a light strip, the line scan module further includes:

[0014] The housing has a first receiving cavity and a second receiving cavity connected to the first receiving cavity. The light strip is disposed in the first receiving cavity and the light guide is disposed in the second receiving cavity.

[0015] A transparent protective plate is disposed on the light-emitting side of the light guide portion and located in the second accommodating cavity.

[0016] Furthermore, the line scanning module also includes:

[0017] A heat sink is disposed within the first accommodating cavity and located on the back of the light strip;

[0018] A fan is mounted on the housing and located on the side of the heat sink away from the light strip.

[0019] Furthermore, the housing includes: an upper shell, and a support frame connected to the upper shell;

[0020] The first accommodating cavity is disposed inside the upper housing, and the fan is disposed on the upper housing;

[0021] The second accommodating cavity is disposed within the support frame.

[0022] Furthermore, connecting plates are provided on both sides of the support frame along its length, and the connecting plates are provided with locking grooves. The light guide is locked into the second accommodating cavity, and both ends along its length are locked into the locking grooves.

[0023] Based on the same concept, the present invention also proposes a liquid crystal film image inspection machine, which includes: a machine base, wherein the machine base is horizontally arranged;

[0024] XYZ direction moving component, the XYZ direction moving component is disposed on the machine base;

[0025] A camera assembly, the camera assembly being disposed on the XYZ direction movement assembly; and

[0026] As described above, the line scanning light module is detachably mounted on the XYZ direction moving component.

[0027] Furthermore, the shooting direction of the camera assembly and the light emission direction of the line scan module are both inclined to the vertical direction and symmetrically arranged.

[0028] Furthermore, the machine tool includes a support platform, which is a marble platform.

[0029] Beneficial Effects: Compared with the prior art, the present invention proposes a line scanning light module for developing glass and a liquid crystal film image inspection machine. The light source emits white light towards the light guide section, and the light is guided by a light guide section formed by multiple light guide cones. These light guide cones are correspondingly arranged with each light-emitting element in the light source. The light emitted by one light-emitting element is emitted from the corresponding light guide cone, transforming the light emitted by the light source into parallel or near-parallel light. Furthermore, the axial length of the light guide cones is short, resulting in a short side mixing distance. This allows most of the light emitted by the light-emitting element to be emitted in parallel, forming parallel or near-parallel light. The light is guided through light-blocking plates at both ends of the light guide, preventing it from slanting out from the axial direction of the light guide. This further ensures that the emitted light is parallel or nearly parallel (angle less than 10°). When this parallel light illuminates the surface of the developing glass, a tiny step exists between the outline of the developing lines on the glass and the glass surface. When light perpendicular to the developing glass strikes this step, there is no stray light, and no light is reflected back to the lens from the step. As a result, the outline of the developing lines is captured by the camera as a black image, making the black border of the developed lines very clear. This clear black border allows for a precise determination of the shape of the lines on the developing glass. Existing technologies use scattered light (scattered monochromatic light), where the incident angle of the light processed by the diffuser varies. In particular, stray light can also emerge from the side of the light guide, causing light to reflect off the edges of the developing circuitry and enter the lens. This means that light emanating from the edges of the outline will appear on the photograph, resulting in a lack of distinction in brightness between the outline's edge and other areas. Consequently, the outline cannot be clearly displayed as black in the camera image, making it difficult to identify. Therefore, this solution provides better illumination for camera imaging, resulting in images that clearly show the circuitry outlines. The liquid crystal whole-film image inspection machine using this solution's line-scanning light module can clearly image the circuitry outlines of defective products, minimizing omissions, providing good inspection results, and enabling timely rework of defective products. It also saves materials and costs. This solution addresses the problem in existing technologies where the white light source provided by the line-scanning light module produces unclear images after illuminating the developing glass, leading to poor inspection results. Attached Figure Description

[0030] Figure 1 This is an exploded view of an embodiment of a line scanning module for developing glass according to the present invention;

[0031] Figure 2 This is a schematic diagram of an embodiment of a line scanning module for developing glass according to the present invention;

[0032] Figure 3 This is a partially exploded view of the structure of a liquid crystal film image inspection machine according to the present invention;

[0033] Figure 4 This is a partial structural schematic diagram of a liquid crystal film image inspection machine according to the present invention;

[0034] Figure 5 This is another schematic diagram of the light source section of an embodiment of a line scanning module for developing glass according to the present invention;

[0035] Figure 6 This is a schematic diagram of a liquid crystal film image inspection machine with a marking device according to the present invention.

[0036] The following are the labels in the diagram: 10, Linear scanning module; 20, Machine base; 30, XYZ direction moving component; 40, Camera component; 41, Imaging unit; 42, Lens; 50, Magazine mechanism; 60, Area array camera; 70, Marking device; 100, Light source unit; 110, Lamp board; 120, Light-emitting element; 130, Optical fiber; 140, Light-emitting lamp; 150, Moving component; 200, Light guide unit; 210, Light guide cone; 400, Housing; 410, Upper housing; 411, First accommodating cavity; 420, Support frame; 421, Second accommodating cavity; 422, Slot; 430, Connecting plate; 431, Inserting slot; 500, Transparent protective plate; 600, Heat sink; 700, Fan; 800, Aviation terminal. Detailed Implementation

[0037] This invention provides a line scanning module for developing glass and a liquid crystal film image inspection machine. To make the objectives, technical solutions, and effects of this invention clearer and more explicit, the invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0038] To address the current inefficiency of manual inspection, which typically takes 30-60 minutes to inspect a single piece of molded glass, and the limited field of view of high-magnification microscopes leading to omissions during manual glass movement, further issues arise. Visual fatigue, skill deficiencies, and poor management also contribute to missed inspections. This results in batches of defective products flowing into subsequent processes, causing significant scrap. This solution proposes a liquid crystal film image inspection machine. The front-end process can be automated using this machine, replacing manual labor, improving efficiency, and reducing scrap. Furthermore, the lines on the developed glass are extremely fine, with diameters as small as 7-10 μm, resulting in a massive amount of image data captured by the liquid crystal film image inspection machine. Uneven thickness of the photosensitive emulsion layer on the developed glass surface causes thin-film interference. Ordinary monochromatic line scanning light irradiating the surface produces large areas of black and white ripples, creating regions of varying brightness that are easily confused with the developed lines, thus compromising the integrity of the entire developed circuit. Therefore, existing liquid crystal film image inspection machines using monochromatic line array light sources are ineffective when inspecting the developed lines. If the existing light source is not improved, it will be impossible to detect defects in the front-end process in time and to effectively control existing defects, resulting in defective products leading to material scrapping and labor losses.

[0039] To address the aforementioned issues, this solution also proposes a line-scanning module for developing glass, applied to a liquid crystal film image inspection machine, providing clear imaging of the line contours. Through a large target area, high-resolution line scan camera, high-resolution optical lens, and a specially designed lighting method and light source, the high-speed inspection challenge of obtaining micron-level resolution images of the entire developing glass film is solved. Details are as follows:

[0040] Example 1

[0041] like Figure 1 , Figure 2As shown, this embodiment discloses a line scanning module 10 for developing glass, used to detect lines on the developing glass. It includes a light source 100, a light guide 200, and a light-shielding sheet (not labeled in the figure). For ease of structural description, the projected outline of the line scanning module 10 on the horizontal plane is taken as a rectangle, where the long side is the length direction and the short side is the width direction. In this embodiment, the length and width directions are used as the basis for structural description. In this embodiment, the light source 100 extends along the length direction and includes multiple light guide frustums 210. These multiple light guide frustums 210 are axially aligned with and located on the light-emitting side of the light-emitting elements 120, which emit white light. Taking the developing glass to be tested located below the light source 100 as an example, the light source 100 emits light downwards. The light guide 200 is located below the light source 100, and it converges the light from the light source 100 into a near-parallel light effect, concentrating the light and increasing brightness. By emitting white light, which shines on the unevenly thick photosensitive emulsion layer, some light is always reflected, forming rainbow colors. The reflected light is received by the camera, achieving imaging on a black and white photograph. Areas with reflected light will not appear as dark spots in the photograph. However, when the original monochromatic light shines on the photosensitive emulsion layer, some light is not reflected, resulting in dark spots. Therefore, in this embodiment, white light is used as the line scanning light, which has a significant improvement effect on the image. Furthermore, the light emitted by the light source is converted into parallel or near-parallel light by the corresponding light guide frustum 210. The light guide frustum 210 has a short axial length and a short side mixing distance, ensuring that most of the light emitted by the light-emitting element 120 is emitted in parallel, forming stable parallel or near-parallel light (angle less than 10°), which is less prone to scattering. The light-shielding plates are placed at both ends of the length of the light guide 200 to block light from both ends. This prevents the light from being emitted obliquely from both ends of the axial direction of the light guide 200, thus minimizing the impact on parallel light and ensuring that the light emitted by the light guide 200 remains parallel. When parallel light illuminates the surface of the developing glass to be tested, because there is a very small step between the outline edge of the developing lines on the developing glass and the glass plane, when light perpendicular to the developing glass illuminates the step, there is no stray light influence, and no light is reflected back to the lens from the step. Therefore, the image of the outline edge of the developed lines captured by the camera is black, and the black edge of the developed lines after imaging is very clear. The shape of the lines on the developing glass can be clearly determined by the clear black border.

[0042] In this embodiment, the light source 100 is a light strip, specifically including a light panel 110, on which multiple light-emitting elements are disposed. The light panel 110 extends along its length, and multiple light-emitting elements 120 are spaced apart along its length on the light panel 110. This makes the light emitted by the light-emitting elements 120 linear in the length direction. Since the camera requires high-speed imaging and a short exposure time, it needs high brightness of light provided by the light source. Therefore, in this solution, the light-emitting elements 120 use LED beads, specifically high-brightness and low-heat-generating LED beads, which emit white high-brightness LED light.

[0043] Since the light source unit 100 may require different light sources to match the glass being tested depending on the type of glass being tested, this line scanning module can be designed to be detachable for easy replacement. However, to facilitate the replacement of the light source, such as changing white light to monochromatic light or a brighter light source, another structure of the light source unit 100 in this embodiment facilitates replacement. Specifically, it includes an optical fiber 130 and a light-emitting lamp 140 located at the end of the optical fiber. The front end of the optical fiber 130 serves as a light-emitting element and faces the light guide. The light-emitting lamp still uses a high-brightness LED as the light source. Multiple optical fibers are provided, and the ends of these fibers are matched with the light-emitting lamps to conduct the light emitted by the lamps, thus transmitting the light from the front end of the optical fibers towards the light guide. Through the remote light transmission via the optical fibers, the light-emitting lamps can be positioned outside the line scanning module 10. Therefore, when the light needs to be replaced, the light-emitting lamp can be replaced directly without changing the connection structure and positional relationship between the front end of the optical fiber and the light guide. This makes replacing the light source unit easier and more convenient.

[0044] In addition, an interface can be provided at the connection point between the end of the optical fiber 130 and the light source 140. This interface allows for detachable connection between the end of the optical fiber 130 and the light source 140, enabling the light source 140 to be configured with various specifications, each compatible with a different light source. When different brightness levels are required, the corresponding light source 140 can be connected to the end of the optical fiber 130 via the interface, facilitating the replacement of the light source 140.

[0045] In another embodiment, a moving component 150 may be provided, such as a linear slide table driven by a motor, or a lead screw and nut driven by a motor. The moving component 150 is connected to LEDs 140 of different specifications. The LEDs of different specifications can be automatically moved to the interface of the optical fiber by the drive of the motor, and the LED of the required color is connected to the optical fiber, thereby realizing automatic switching of the light source.

[0046] Moreover, the light source unit 100 is set to the mode of optical fiber light guiding, so that the light-emitting lamp of the light source does not need to be set near the lens and move together with the lens. For the light-emitting lamp beads supporting the light-emitting lamp set far away from the lens, the parameters such as size, light intensity, and heat dissipation are not limited by the installation size near the lens, and a higher-intensity lighting effect can be provided. Therefore, in the form of optical fiber, it can also be used as the light source of external coaxial light.

[0047] In this embodiment, the central axis of the cylindrical light guiding part 200 formed by multiple light guiding frustums 210 is parallel to the length direction of the lamp bar; the light of the LED lamp beads is converged into an effect close to parallel light through the cylindrical light guiding part 200, and the light is concentrated to increase the brightness. The light guiding part 200 is a glass light guiding part or a transparent acrylic light guiding part; in this way, the light guiding part 200 has a high light transmittance and a low manufacturing cost.

[0048] In another solution of this embodiment, a light blocking film is provided between adjacent light guiding frustums 210, so that each light guiding frustum 210 can be separated, so that the side surfaces (axial side surfaces) between each light guiding frustum 210 do not conduct light, avoiding light mixing, and thus more stably ensuring that the emitted light is parallel light.

[0049] In the parallel light path mode, for the developing glass, since the diffusion angle of the conventional linear light source in the axial direction of the light guiding rod is relatively large, a similar "shadowless lamp" effect appears. Then in this solution, the parallel film (diffusion film) is cancelled, and after the quartz material light guiding rod is cold polished, it is cut into circular wafers with a thickness of 3 - 10 mm to form the light guiding frustum 210. In this way, the emitted light can also be close to parallel light (the included angle is less than 10°) in the rod axis direction.

[0050] As Figure 1 shown, this embodiment takes the structure when the light source unit 100 uses a lamp bar as an example to describe the specific structure. The line scan light module 10 further includes: a housing 400, and a transparent protection plate 500. A first accommodation cavity 411 is provided in the housing 400, and a second accommodation cavity 421 communicated with the first accommodation cavity 411 is provided. The second accommodation cavity 421 is provided below the first accommodation cavity 411. The lamp bar is arranged in the first accommodation cavity 411. The inner wall contour of the second accommodation cavity 421 matches the light guiding part 200, and the light guiding part 200 is arranged in the second accommodation cavity 421. The transparent protection plate 500 extends along the length direction, and the transparent protection plate 500 is arranged below the light guiding part 200 and is located in the second accommodation cavity 421. In the specific structure, the lower part of the second accommodation cavity 421 is an opening, and a clamping groove 422 is opened on the inner wall at the opening position. The transparent protection plate 500 is clamped in the clamping groove 422 and covers the opening. A bracket can be formed by the housing 400 and the transparent protection plate 500 to protect the lamp bar and the light guiding part 200.

[0051] like Figure 1 , Figure 2 As shown, the line scanning module 10 in this embodiment further includes a heat sink 600 and a fan 700. The heat sink 600 is disposed within the first accommodating cavity 411 and is located on the back (above) of the light strip. An opening is provided at the upper part of the first accommodating cavity 411, and the heat sink 600 fills the first accommodating cavity 411 and faces the opening. The fan 700 is disposed on the housing 400 and is located on the side (above) of the heat sink 600 away from the light strip. By disposing of the heat sink 600 on the back of the light strip and the fan 700 on the heat sink 600, the heat sink 600 conducts heat, transferring heat from the light strip and the first accommodating cavity 411. The fan 700 blows air through the heat sink 600, allowing the heat to be dissipated in a timely manner, thereby achieving heat dissipation for the light strip.

[0052] The line scan module 10 also includes an aviation terminal 800, which is disposed on the housing 400 and electrically connected to the light strip. The aviation terminal 800 serves as a quick-connect plug, allowing for rapid connection of external cables to power the light strip.

[0053] like Figure 1 , Figure 2 As shown, for ease of assembly, the housing 400 includes: an upper shell 410 and a support frame 420 connected to the upper shell 410; a first accommodating cavity 411 is disposed within the upper shell 410, and the fan 700 is disposed on the upper shell 410; a second accommodating cavity 421 is disposed within the support frame 420, and the transparent protective plate 500 is disposed on the support frame 420 and located at the lower opening (the opening of the second accommodating cavity 421). In this way, the upper shell 410 and the support frame 420 are spliced ​​together, with the light strip fixed via the upper shell 410, and the light guide 200 and the transparent protective plate 500 fixed via the support frame 420. This facilitates the disassembly and installation of the components and improves assembly efficiency.

[0054] The support frame 420 has connecting plates 430 on both sides along its length. Each connecting plate 430 has a locking groove 431. The light-shielding sheet is adhered to the inner wall of the locking groove 431. The light guide 200 is fitted into the second accommodating cavity, with both ends along its length fitted into the locking groove 431. The connecting plates 430 securely fasten the two ends of the light guide 200, facilitating its insertion into the second accommodating cavity and conveniently sealing both ends of the cavity, thus simplifying the installation of the light guide 200.

[0055] Therefore, in this embodiment, white light is emitted from the light source 100 towards the light guide 200, and light is guided by the light guide 200 formed by multiple light guide cones 210. The multiple light guide cones 210 are correspondingly arranged with each light-emitting element 120 of the light source 100. The light emitted by one light-emitting element 120 is emitted from the corresponding light guide cone 210, and the light emitted by the light source is converted into parallel light or near-parallel light by the corresponding light guide cone 210. Moreover, the axial length of the light guide cone 210 is short, and its side light mixing distance is short, so that most of the light emitted by the light-emitting element 120 is emitted in parallel, forming parallel light or near-parallel light. Furthermore, the light-shielding plates at both ends of the light guide 200 prevent light from being emitted obliquely from both axial ends of the light guide 200. This further ensures that the emitted light is parallel or nearly parallel (angle less than 10°). When the parallel light illuminates the surface of the developing glass to be tested, there are tiny steps between the outline edge of the developing lines on the developing glass and the glass plane. When light perpendicular to the developing glass illuminates the step, there is no stray light, and no light is reflected back to the lens from the step. Thus, the outline edge of the developed lines is captured by the camera as a black image, and the black edge of the developed lines is very clear. The shape of the lines on the developing glass can be clearly determined through the clear black edge. Existing technologies using scattered light suffer from varying incident angles as the diffuser processes the light. In particular, stray light can also emerge from the sides of the light guide, causing reflections from the edges of the developing circuitry into the lens. This results in light emanating from the edges of the circuitry appearing on the photograph, making the brightness difference between the edges and other areas less pronounced. Consequently, the circuitry in the camera image is not clearly displayed as black, making it difficult to identify. Therefore, this solution provides better illumination for camera imaging, resulting in images that clearly show the circuitry outlines. The liquid crystal film image inspection machine using the line-scanning light module 10 of this solution can clearly image the circuitry outlines of defective products, minimizing omissions and providing excellent inspection results. It allows for timely detection and rework of defective products, saving materials and costs. This also solves the problem of poor inspection results caused by the white light source provided by the line-scanning light module 10 in existing technologies, which produces unclear images after illuminating the developing glass.

[0056] Example 2

[0057] like Figure 3 , Figure 4As shown, based on the same concept, this invention also proposes a liquid crystal film image inspection machine, comprising: a machine base 20, an XYZ direction moving assembly 30, a camera assembly 40, and the line scanning light module 10 from Embodiment 1. The machine base 20 is horizontally positioned, the XYZ direction moving assembly 30 is mounted on the machine base 20, and the camera assembly 40 is mounted on the XYZ direction moving assembly 30; the line scanning light module 10 is detachably mounted on the XYZ direction moving assembly 30. The developing glass to be inspected is placed horizontally on the machine base 20. The XYZ direction moving assembly 30 drives the camera assembly 40 and the line scanning light module to move in the X, Y, and Z directions, enabling the camera assembly 40 and the line scanning light module to scan across the developing glass in the horizontal plane (XY plane). The line scanning light module 10 illuminates the developing glass, and the camera assembly 40 takes an instant photograph, achieving rapid image capture. The photograph is then displayed on an external computer or an internal display screen, thus enabling the inspection of the developing glass.

[0058] The machine tool 20 includes a support platform, which is a marble platform. The marble platform ensures the flatness of the machine tool 20. Since marble has no internal stress, it will not affect the detection accuracy when supporting the developing glass of the workpiece due to stress. Furthermore, marble can buffer vibrations, avoiding the impact of small vibrations on the detection structure during the detection process. A diffuse reflection substrate is laid on the detection area of ​​the marble platform; high-brightness LED line light sources of multiple wavelengths are used, combined with a pure black diffuse reflection (matte) substrate, to improve the signal-to-noise ratio of the ITO circuit image. This reduces interference during the detection process and improves image quality.

[0059] like Figure 4 As shown, the camera assembly 40 of this liquid crystal film image inspection machine includes: an imaging unit 41 and a lens 42 connected to the program unit. The imaging unit 41 uses a large-area, high-resolution line scan camera to maximize the field of view of the image to 16K (or higher) while maintaining the same optical magnification. The lens 42 uses a high-resolution optical lens. Specifically, it uses a lens 42 with approximately 1.75x magnification, combined with the large-area line scan camera, to achieve an image resolution of 2µm, ensuring the detection of lines on developing glass of 7-10µm. Alternatively, it can be combined with a higher-resolution lens 42, such as a 3.5-5x lens 42, to improve the resolution to 1µm-0.7µm, resulting in better imaging and more accurate inspection results. A lens balance adjustment structure is designed, using a micrometer to adjust the base of the lens 42.

[0060] like Figure 4As shown, in this embodiment, the shooting direction of the camera assembly 40 and the light emission direction of the line-scanning module 10 are both tilted vertically and symmetrically arranged. In high-resolution applications, tilted lighting (rather than coaxial lighting) can reduce the brightness loss of the light source and increase the reflectivity of the lines on the developing glass. It also avoids the influence of the coaxial semi-reflective mirror on image quality, further reducing light loss and improving brightness. A clip mechanism 50 is provided on the XYZ direction moving assembly 30. The clip mechanism 50 is mounted on the XYZ direction moving assembly 30 and can be detachably connected to the line-scanning module 10. When the line-scanning module 10 is inserted into the clip mechanism 50, the line-scanning module 10 is fixed to the XYZ direction moving assembly 30; when the line-scanning module 10 is removed from the clip mechanism 50, different colored light sources can be quickly replaced.

[0061] In addition, the liquid crystal film image inspection machine in this embodiment also includes a grating ruler, which can be triggered to generate an image capture trigger signal to ensure that the starting positions of multiple columns of acquired images are consistent and that the images are stitched together. Figure 1 In this embodiment, the camera assembly 40 includes both a line scan camera and an area scan camera 60. Furthermore, the area scan camera 60 and the line scan camera's FA (autofocus) function are used to achieve collaborative operation.

[0062] In another embodiment, the liquid crystal film image inspection machine is further equipped with a marking device 70, which can mark erroneous parts of the lines on the developing glass to more clearly indicate that the developing glass is defective. For automatic control of the marking device 70, a movement drive device or an XYZ direction movement component 30 can be used to receive control commands and move the marking device to the corresponding error position for marking. The marking device can also be replaced by a correction device to directly correct the error.

[0063] The liquid crystal film image inspection machine in this embodiment boasts high testing accuracy, with a resolution exceeding that of ordinary microscopes. It can detect micron-level short circuits, open circuits, or other defects, surpassing the identification capabilities of ordinary technicians. Furthermore, it offers high production efficiency, completing the inspection of an entire mold of glass within 1-5 minutes, 20-30 times faster than manual inspection. This significantly reduces the waiting time for initial sample inspection and improves the utilization rate of the production line. In the event of intermittent defects, it can promptly identify defects, adjust process parameters, and prevent the accumulation of large quantities of defects. The quality is stable and reliable, independent of human skill level and mental state, ensuring the quality of the manufacturing process.

[0064] In summary, compared with the prior art, the present invention proposes a line scanning module for developing glass and a liquid crystal film image inspection machine, which emits white light from the light source towards the light guide. When the white light shines on the photosensitive emulsion layer with uneven thickness, some light will always be reflected. The reflected light is received by the camera to achieve imaging, so that dark spots will not appear in the photo. Furthermore, light is guided by a light guide section formed by multiple light guide cones. These light guide cones are correspondingly set with each light-emitting element in the light source section. The light emitted by one light-emitting element is emitted from the corresponding light guide cone. The light emitted by the light source is converted into parallel or near-parallel light by the corresponding light guide cone. Moreover, the axial length of the light guide cone is short, and its side light mixing distance is short. This allows most of the light emitted by the light-emitting element to be emitted in parallel, forming parallel or near-parallel light. In addition, the light shields at both ends of the light guide section prevent the light from being emitted at an angle from both ends of the axial direction of the light guide section. This further ensures that the emitted light is parallel or near-parallel (angle less than 10°). When the parallel light shines on the surface of the developing glass to be tested, there is a very small step between the outline edge of the developing line on the developing glass and the glass plane. When the light perpendicular to the developing glass shines on the step position, there is no stray light influence. No light is reflected back to the lens from the step. Thus, the outline edge of the developed line is captured by the camera as black, and the black edge of the developed line after imaging is very clear. The shape of the circuit on the developing glass can be clearly identified by the clear black edges. However, existing technologies use scattered light (scattered monochromatic light), and the incident angle of the light processed by the diffuser varies. In particular, stray light can also emerge from the side of the light guide, causing light to reflect off the edges of the developing circuit contours and enter the lens. This light emanating from the edges of the contours will appear on the photograph, making the brightness of the circuit contour edges indistinguishable from other areas. Consequently, the circuit contours cannot be clearly displayed as black in the camera image, making them difficult to identify. Therefore, this solution provides better illumination for camera imaging, making the image of the circuit contours more clearly visible. The liquid crystal whole-film image inspection machine formed by the line scanning light module using this solution can clearly image the circuit contours of defective products, reducing the likelihood of omissions, resulting in good inspection performance, and enabling timely detection and rework of defective products. It also saves materials and costs. This solves the problem of poor inspection performance caused by the unclear imaging of the white light source provided by the line scanning light module in existing technologies after illuminating the developing glass.

[0065] It should be understood that the application of the present invention is not limited to the examples above. Those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A line scanning module for developing glass, used to detect developing lines on the developing glass, characterized in that, The light source includes a light source unit, which includes a plurality of light-emitting elements arranged side by side along the length direction, and the light-emitting elements emit white light; A light guide section, comprising multiple light guide truncated cones, which are arranged axially and corresponding to multiple light-emitting elements, and located on the light-emitting side of the light-emitting elements; A light-shielding sheet is disposed at both ends of the light guide portion along its length. The light emitted by the light source is converted into parallel or near-parallel light by the corresponding light guide frustum, and the axial length of the light guide frustum is shorter than the radial length, so that the light mixing distance from the side of the light guide frustum is short, so that most of the light emitted by the light-emitting element is emitted in parallel. When parallel light shines on the surface of the developing glass to be tested, there will be a step between the outline edge of the developing line on the developing glass and the glass plane. When the light shines on the step, there is no stray light. No light is reflected back to the lens from the step. Thus, the outline edge of the developing line is captured by the camera and the image formed is black. The edge of the developed line after imaging is a clear black border. The shape of the line on the developing glass can be determined by the clear black border.

2. The line scanning module according to claim 1, characterized in that, The light source is a light strip, the light strip includes a light board, the light-emitting element is an LED bead, and a plurality of the LED beads are disposed on the light board; or The light source includes an optical fiber and a light-emitting lamp located at the end of the optical fiber. The front end of the optical fiber serves as the light-emitting element and is disposed towards the light guide.

3. The line scanning module according to claim 1, characterized in that, A light-blocking film is provided between adjacent light-guiding frustums.

4. The line scanning module according to claim 1, characterized in that, When the light source unit uses a light strip, the line scan module further includes: The housing has a first receiving cavity and a second receiving cavity connected to the first receiving cavity. The light strip is disposed in the first receiving cavity and the light guide is disposed in the second receiving cavity. A transparent protective plate is disposed on the light-emitting side of the light guide portion and located in the second accommodating cavity.

5. The line scanning module according to claim 4, characterized in that, The line scanning module also includes: A heat sink is disposed within the first accommodating cavity and located on the back of the light strip; A fan is mounted on the housing and located on the side of the heat sink away from the light strip.

6. The line scanning module according to claim 5, characterized in that, The housing includes: an upper shell, and a support frame connected to the upper shell; The first accommodating cavity is disposed inside the upper housing, and the fan is disposed on the upper housing; The second accommodating cavity is disposed within the support frame.

7. The line scanning module according to claim 6, characterized in that, The support frame has connecting plates on both sides along its length, and the connecting plates have slots for locking. The light guide is locked into the second accommodating cavity, and both ends along its length are locked into the slots.

8. A liquid crystal film image inspection machine, characterized in that, include: The machine platform is horizontally positioned. XYZ direction moving component, the XYZ direction moving component is disposed on the machine base; A camera assembly is disposed on the XYZ direction moving assembly; as well as The line scanning module for developing glass as described in any one of claims 1-7, wherein the line scanning module is disposed on the XYZ direction moving component.

9. The liquid crystal film image inspection machine according to claim 8, characterized in that, The shooting direction of the camera assembly and the light emission direction of the line scan module are both inclined to the vertical direction and symmetrically arranged.

10. The liquid crystal film image inspection machine according to claim 8, characterized in that, The machine includes a support platform, which is a marble platform.

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