Electronic light guide plate warping degree detection workbench

Abstract

The present application relates to light guide plate manufacturing technical field, especially electronic light guide plate warping degree detection workbench, including box, still including: sliding frame, between the left and right sides of the upper part of the box is connected in the longitudinal sliding type, for bearing laser detector, drive mechanism, installed on the box, for driving the sliding frame moves in the longitudinal direction, laser detector body, through the electric slide rail slidingly connected to the sliding frame, for moving left and right under the drive of electric slide rail to scan detection light guide plate, this workbench through setting multiple longitudinal adjustable sliding frame and multiple horizontal sliding slide block, realize the two-dimensional flexible layout of air floating support point, the staff can choose the support point position and quantity according to the size of light guide plate, both meet the stability demand of oversized product, and can avoid the weak parts such as hollow, solve the poor adaptability problem of traditional fixed air floating support.

Description

Technical Field

[0001] This invention relates to the field of light guide plate testing technology, and in particular to a worktable for testing the warpage of electronic light guide plates. Background Technology

[0002] The light guide plate (LGP) is an optical component of the backlight module of a liquid crystal display (LCD), and its surface flatness and warpage directly affect display quality. In high-generation manufacturing lines, high-precision online detection of light guide plate warpage has become a key process to ensure yield. To avoid introducing additional deformation through contact supports, the industry generally adopts an air-floating non-contact support method, allowing the light guide plate to be measured in a near-free state.

[0003] Currently, mainstream testing equipment mainly falls into two categories. One type uses a fixed three-point air-bearing support, ensuring static constraint based on the "three-point fixed plane" principle. However, this solution is only suitable for standard rectangular light guide plates with fixed dimensions, and cannot be adapted to ultra-large (e.g., over 75 inches), ultra-thin (thickness less than 0.8 mm), or products with irregular contours (e.g., rounded corners, missing corners). When the support span is too large, the middle of the light guide plate is prone to sag due to its own weight, resulting in poor measurement repeatability and even vibration interference. The other type of equipment attempts to use four or more fixed air-bearing points to improve stability. However, this type of solution has the risk of over-positioning: due to micron-level height errors in the manufacturing and installation of the air-bearing head, the flexible light guide plate will be forcibly flattened, producing a false reverse bending. What is measured is not the true warping, but the residual deformation after constraint. In addition, the fixed layout cannot avoid structurally weak parts such as the cutouts on the light guide plate and the flexible circuit board attachment area, further affecting the reliability of the measurement.

[0004] Therefore, there is an urgent need for a new type of air-floating support platform that can flexibly adapt to light guide plates of different sizes and structures, and can be constructed as needed in a stress-free support state. Summary of the Invention

[0005] In order to overcome the shortcomings of existing fixed air-bearing supports that cannot ensure the accuracy of measurements while taking into account the stability of large-size light guide plates and the adaptability to irregular structures, this invention provides an electronic light guide plate warpage detection worktable.

[0006] An electronic light guide plate warpage detection workbench includes a housing and further comprises: a sliding frame, longitudinally slidably connected between the left and right sides of the upper part of the housing, for supporting a laser detector; a drive mechanism, mounted on the housing, for driving the sliding frame to move longitudinally; a laser detector body, slidably connected to the sliding frame via an electric slide rail, for moving left and right under the drive of the electric slide rail to scan and detect the light guide plate; four sliding frames, longitudinally slidably connected to the housing, whose positions can be independently adjusted longitudinally; twenty-four sliders, with six sliders slidably connected to each sliding frame in the horizontal direction, whose positions can be independently adjusted horizontally; air float heads, the number of which is the same as the number of sliders, respectively disposed in each slider, with nozzles protruding from the top surface of the slider for spraying gas to form air float support; an air path on / off control component, disposed in each air float head body, for automatically controlling the air passage state of the corresponding air float point according to the position of the slider; and a follow-up limit component, disposed on each slider, for automatically rising and limiting the light guide plate when the slider moves out.

[0007] Furthermore, the air path on / off control component includes: a connecting pipe located at the lower end of each air float head body, each connecting pipe having a through air supply channel for connecting to the air supply system; a sliding rod slidably connected to each connecting pipe along the longitudinal direction, each sliding rod having a vertical air outlet; a spring connected between each sliding rod and its corresponding connecting pipe for driving the corresponding sliding rod to reset; a first guide plate fixed to the bottom of each sliding frame; and a trigger ball located at one end of each sliding rod for engaging with the corresponding first guide plate. Initially, each first guide plate abuts against the trigger ball of the corresponding sliding rod, causing each sliding rod to compress its corresponding spring, and each air outlet to be misaligned with its corresponding air supply channel. When the slider moves out, causing the sliding rod to disengage from the first guide plate, the spring drives the sliding rod to reset, aligning the air outlet with the air supply channel.

[0008] Furthermore, the four sliding frames are distributed longitudinally, arranged sequentially, and defined as the first to fourth rows of sliding frames; the first guide plate is symmetrically arranged at the bottom of each sliding frame, wherein the first guide plate of the first and third rows of sliding frames is located at the rear side of the bottom of the corresponding sliding frame, and the first guide plate of the second and fourth rows of sliding frames is located at the front side of the bottom of the corresponding sliding frame; the trigger ball is disposed on each sliding rod, wherein the trigger ball in the first and third rows of sliders is disposed at the rear end of the corresponding sliding rod, and the trigger ball in the second and fourth rows of sliders is disposed at the front end of the corresponding sliding rod.

[0009] Furthermore, the follow-up limiting assembly includes: limiting plates, which are vertically slidably connected to each slider, and each limiting plate is right-angled to fit adjacent sides of the light guide plate; fixing rods, which are fixed to the bottom of each limiting plate, and the lower ends of each fixing rod protrude from the corresponding slider; connecting rods, which are slidably connected to the lower ends of each fixing rod; second guide plates, which are fixed to each sliding rod, and each second guide plate has an inclined slide rail; the lower ends of each connecting rod are embedded in the inclined slide rail of the corresponding second guide plate to convert the longitudinal movement of the corresponding sliding rod into the vertical movement of the corresponding connecting rod.

[0010] Furthermore, each connecting rod and its corresponding fixed rod are provided with a pre-tightened friction force, which is greater than the weight of the corresponding fixed rod and less than the thrust required to move the corresponding connecting rod. When each sliding rod moves, each connecting rod drives the corresponding fixed rod and the limiting plate to rise together through this friction force; when each limiting plate is manually pressed, this friction force is overcome, causing the corresponding connecting rod of the fixed rod to slide down and remain in a low position.

[0011] Furthermore, each slider has two guide grooves and one sliding groove on the side near the corresponding limiting plate. Each limiting plate slides vertically between the two guide grooves, and the bottom plate of each limiting plate slides up and down in the corresponding sliding groove.

[0012] Furthermore, the drive mechanism includes a motor and screws. The motors are symmetrically mounted on the rear side of the housing. The output shafts of each motor are fixedly connected to corresponding screws via couplings. Each screw is rotatably connected to the housing. The sliding frame is threadedly connected to both screws.

[0013] Furthermore, it also includes a locking assembly, which includes a square through-hole on the left side of the housing and four fastening bolts therein. Each fastening bolt is threadedly connected to a corresponding sliding frame to lock the longitudinal position of each sliding frame.

[0014] Compared with the prior art, the present invention has the following advantages: This workbench, by setting four vertically adjustable sliding frames and six horizontally sliding sliders in each frame, realizes a two-dimensional arbitrary layout of air-bearing support points; the operator can freely choose the number and position of support points according to the actual size of the light guide plate, which can not only meet the stability requirements of ultra-large size light guide plates, but also flexibly avoid structural weak parts such as hollows and FPC attachment areas, and completely solve the technical problem that traditional fixed air-bearing supports cannot adapt to irregular and large-sized products.

[0015] This workbench incorporates an air path on / off control component within the air-bearing ball head. Through the cooperation of a sliding rod, spring, and first guide plate, it achieves the function of automatically opening the air path as the slider moves out and automatically closing it as the slider returns to its original position. Only the slider that has moved to the working position will eject gas to form air-bearing support. Unused sliders keep the air path closed, which avoids false deformation caused by over-positioning and ensures that the light guide plate is in a stress-free and free state during testing, greatly improving the accuracy and repeatability of warpage measurement.

[0016] This workbench features a follow-up limiting component on the slider. The sliding rod drives the second guide plate, and the inclined slide converts the longitudinal movement into the vertical movement of the connecting rod, thereby driving the limiting plate to rise automatically. The limiting plate has a right-angle design, which can form a rectangular limiting frame at the four corners of the light guide plate, effectively preventing horizontal drift in the suspended state. At the same time, the pre-tightened friction design between the connecting rod and the fixed rod not only ensures that the limiting plate rises with the slider, but also supports the manual pressing and retraction of the limiting plate in the middle position. This achieves differentiated limiting under multi-point support, significantly improving the convenience and adaptability of the detection operation. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0018] Figure 2 This is a three-dimensional structural diagram of the screw, sliding frame, and electric slide rail components of the present invention.

[0019] Figure 3 This is a three-dimensional structural diagram of the sliding frame, slider, and first guide plate of the present invention.

[0020] Figure 4 This is a three-dimensional structural diagram of the slider, connecting tube, and sliding rod components of the present invention.

[0021] Figure 5 This is a three-dimensional structural diagram of the second guide plate, connecting rod, and limiting plate of the present invention.

[0022] Figure 6 This is a three-dimensional structural diagram of the slider of the present invention.

[0023] Figure 7 This is a three-dimensional structural cross-sectional view of the limiting plate, fixing rod, and connecting rod of the present invention.

[0024] Figure 8 This is a three-dimensional structural diagram of the housing and fastening bolts of the present invention.

[0025] Figure 9 This is a three-dimensional structural diagram of the sliding frame and fastening bolt of the present invention.

[0026] In the above attached figures: 101: housing, 102: screw, 1021: motor, 103: sliding frame, 104: electric slide rail, 105: laser detector body, 106: sliding frame, 107: first guide plate, 108: slider, 109: air float head body, 1091: connecting pipe, 110: sliding rod, 111: air outlet, 112: spring, 201: slide groove, 202: guide groove, 203: second guide plate, 204: connecting rod, 205: fixing rod, 206: limiting plate, 301: square through-hole, 302: fastening bolt. Detailed Implementation

[0027] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0028] Example 1: A worktable for detecting the warpage of an electronic light guide plate, such as... Figures 1-3 As shown, the device includes a housing 101. A sliding frame 103 is longitudinally slidably connected between the left and right sides of the upper part of the housing 101 to support the laser detector and enable its forward and backward movement. A motor 1021, symmetrically distributed on the left and right sides, is mounted on the rear side of the housing 101. Each motor's output shaft is fixedly connected to a screw 102 via a coupling. Each screw 102 is rotatably connected to the housing 101. The sliding frame 103 is threadedly connected to both screws 102, thus forming a screw drive mechanism to achieve precise forward and backward driving of the sliding frame 103. A horizontal electric slide rail 104 is provided on the sliding frame 103, within which a laser detector body 105 is slidably connected. This laser detector body 105 moves left and right under the drive of the electric slide rail 104, thereby performing a full-coverage scanning detection of the light guide plate.

[0029] The housing 101 contains four sliding frames 106 that slide longitudinally. These four sliding frames 106 are arranged sequentially along the longitudinal direction and are designated as the first to fourth rows of sliding frames 106. Each sliding frame 106 can be independently adjusted in position along the longitudinal direction to accommodate light guide plates of different widths. Each sliding frame 106 also contains six horizontally sliding sliders 108, designated as the first to fourth rows of sliders 108. Each slider 108 can be independently adjusted in position along the horizontal direction to accommodate light guide plates of different lengths.

[0030] Each slider 108 is equipped with an air float head body 109. The nozzle of each air float head body 109 protrudes from the top surface of the slider 108 to spray gas upwards to form an air float support. Each air float head body 109 has a cross-shaped connecting pipe 1091 at its lower end. The connecting pipe 1091 has a through air supply channel inside to connect the air supply system and the air float head body 109 to introduce compressed gas. Each air float head body 109 is equipped with an air passage on / off control component to automatically control whether the air float point is ventilated according to the position of the slider 108.

[0031] like Figure 4 As shown, specifically, the air passage on / off control component includes sliding rods 110 that are slidably connected to the connecting pipes 1091 along the longitudinal direction. Each sliding rod 110 is connected to the adjacent connecting pipe 1091 by a spring 112 to realize the automatic reset of the sliding rod 110. Each sliding rod 110 has a vertical air outlet 111 for connecting or blocking the air passage.

[0032] like Figure 3 As shown, each sliding frame 106 has a first guide plate 107 symmetrically distributed on the left and right sides fixed to its bottom. Specifically, the first guide plate 107 is fixed to the rear side of the bottom of the first and third row of sliding frames 106, and the first guide plate 107 is also fixed to the front side of the bottom of the second and fourth row of sliding frames 106. Counting from front to back, the rear end of the sliding rod 110 in the first and third row of sliders 108 is provided with a trigger ball, and the front end of the sliding rod 110 in the second and fourth row of sliders 108 is provided with a trigger ball. The trigger ball is used to abut against the corresponding first guide plate 107, thereby triggering the opening and closing of the air passage.

[0033] Initially, each slider 108 is located at the initial position at the left or right end of the sliding frame 106. The first guide plate 107 abuts against the trigger ball of the adjacent sliding rod 110, so that the sliding rod 110 is in a compressed state against the elastic force of the spring 112. At this time, the air outlet 111 in the sliding rod 110 is staggered from the air supply channel of the connecting pipe 1091, and the channel of the connecting pipe 1091 is blocked, so the gas cannot enter the air float head body 109.

[0034] When the air outlet 111 inside the sliding rod 110 is aligned with the air supply channel of the connecting pipe 1091, the channel of the connecting pipe 1091 is opened, and gas can enter the air float head body 109 through the connecting pipe 1091 and be ejected through the nozzle, thereby realizing the air float support function.

[0035] Each slider 108 is provided with a follow-up limiting component for positioning the light guide plate, which is used to automatically raise the limiting plate 206 when the slider 108 moves out, to limit the suspended light guide plate and prevent it from drifting horizontally during the detection process.

[0036] like Figures 5-7 As shown, specifically, the follow-up limiting component includes limiting plates 206 that are vertically slidably connected to the slider 108. The limiting plates 206 are right-angled and are used to fit the adjacent two sides of the light guide plate, abutting the edge of the light guide plate from the side to achieve bidirectional limiting of the corner of the light guide plate. Each limiting plate 206 has a fixing rod 205 fixedly connected to its bottom. The lower end of each fixing rod 205 passes through the slider 108 and is slidably connected to a connecting rod 204 to form a telescopic structure that can slide relative to each other.

[0037] Each sliding rod 110 has a second guide plate 203 fixedly connected to the side near the connecting rod 204. Each second guide plate 203 has an inclined slide rail. The lower end of each connecting rod 204 is embedded in the inclined slide rail near the second guide plate 203, which is used to convert the longitudinal movement of the sliding rod 110 into the vertical movement of the connecting rod 204.

[0038] Each slider 108 has two guide grooves 202 and a sliding groove 201 on the side near the limiting plate 206. Each limiting plate 206 slides vertically between the two guide grooves 202 adjacent to the slider 108, and the bottom plate of each limiting plate 206 slides up and down in the sliding groove 201 adjacent to the slider 108 to ensure the stability of the limiting plate 206 when it is raised or lowered.

[0039] The limiting plates 206 on the first and third rows of sliders 108 are located on the front side of sliders 108, and the limiting plates 206 on the second and fourth rows of sliders 108 are located on the rear side of sliders 108. The limiting plates 206 on adjacent pairs of sliders 108 in the same row are located on the left and right sides of the pair of sliders 108, respectively. That is, in the leftmost pair of sliders 108 in the first row, the limiting plate 206 on the left slider 108 is located at the left corner of the front side of slider 108, and the limiting plate 206 on the right slider 108 is located at the right corner of the front side of slider 108, and so on. Along the longitudinal direction, the limiting plates 206 on the leftmost slider 108 in the first row and the leftmost slider 108 in the second row are arranged in a front-to-back arrangement, so that when the sliders 108 at the four corners move out, the four limiting plates 206 can automatically form a rectangular limiting frame.

[0040] A pre-tightening friction force is provided between the adjacent connecting rod 204 and the fixed rod 205. This friction force is greater than the weight of the fixed rod 205 itself and less than the thrust that drives the connecting rod 204 to move. On the one hand, when the sliding rod 110 drives the second guide plate 203 to move, the connecting rod 204, driven by the inclined slide, can drive the fixed rod 205 and the limiting plate 206 to move upward together through this friction force, thereby realizing the automatic lifting of the limiting plate 206. On the other hand, when it is necessary to manually press the limiting plate 206 downward to reset, the pressing force can overcome the friction force, causing the fixed rod 205 to slide downward relative to the connecting rod 204, and after the pressing is released, it is supported by the slider 108.

[0041] The housing 101 is equipped with a locking component for locking the position of the sliding frame 106; such as Figure 8 and Figure 9 As shown, specifically, the locking assembly includes a square through-hole 301 longitudinally opened on the left side of the housing 101, which contains a number of fastening bolts 302 equal to the number of sliding frames 106. Each fastening bolt 302 is threadedly connected to the adjacent sliding frame 106 and is used to lock and fix the sliding frame 106 after it is adjusted to a suitable position.

[0042] Working principle: Before testing, connect each connecting pipe 1091 to the gas supply system's gas pipeline. During testing, the staff selects the required air-bearing support points according to the size and structure of the light guide plate to be tested, and adjusts the positions of each slider 108 and sliding frame 106 accordingly.

[0043] Taking a four-point air-bearing support as an example, the specific operation is as follows: Move the pair of sliders 108 on the outer left side of the first row of sliding frames 106 to the right, and adjust the horizontal distance between them to match the length of the light guide plate; similarly, move the pair of sliders 108 on the outer left side of the second row of sliding frames 106 to the right and adjust the horizontal distance. Then, loosen the fastening bolts 302 on the second row of sliding frames 106, and push them backward so that the longitudinal distance between the first and second row of sliders 108 matches the width of the light guide plate, and then tighten the fastening bolts 302 to lock the position.

[0044] During the movement of slider 108, the air float head body 109, connecting pipe 1091, and sliding rod 110 move synchronously. When sliding rod 110 disengages from the first guide plate 107, spring 112 drives sliding rod 110 to move longitudinally. The first row of sliding rods 110 moves forward, and the second row of sliding rods 110 moves backward, aligning the air outlet 111 with the air delivery channel of connecting pipe 1091. Gas enters the air float head body 109 through connecting pipe 1091 and is ejected from the nozzle, forming air buoyancy support at four support points.

[0045] Simultaneously, the sliding rod 110 drives the second guide plate 203 to move longitudinally, and its inclined slide rail drives the connecting rod 204 to move upward. Because the pre-tightening friction between the connecting rod 204 and the fixed rod 205 is greater than the weight of the fixed rod 205, the connecting rod 204 drives the fixed rod 205 and the limiting plate 206 to rise together. The four limiting plates 206 are located at the four corners of the light guide plate, and their right-angled structure limits the light guide plate from adjacent sides, preventing it from drifting horizontally in the air-floating state.

[0046] The light guide plate to be tested is placed above the four air-bearing ball heads 109, and the ejected gas makes it stable in a suspended state. The motor 1021 is started, which drives the sliding frame 103 through the screw 102 to move the laser detector body 105 forward to above the light guide plate; at the same time, the electric slide rail 104 is started to drive the laser detector body 105 to move left and right to perform warpage scanning detection on various parts of the light guide plate.

[0047] For extra-large light guide plates, six-point or eight-point air-bearing supports can be used to improve stability. Taking eight-point support as an example: select the four sliders 108 at the left end of the first and second rows, move them out as described above, and adjust them to the appropriate spacing. At this time, all eight limiting plates 206 will automatically rise. Since only the four corner positions need to be limited, the operator presses down the four limiting plates 206 in the middle position, causing their fixing rods 205 to slide downwards and retract relative to the connecting rods 204, while the limiting plates 206 at the four corners remain raised, forming a rectangular limiting frame. The remaining operations are the same as for four-point support.

[0048] After the test is completed, the control motor 1021 reverses, causing the sliding frame 103 to drive the laser detector body 105 to reset backward. The light guide plate is removed, and each slider 108 is moved back to its initial position. During the reset process of the slider 108, the trigger ball of the sliding rod 110 contacts the inclined surface of the first guide plate 107. Under the constraint of the first guide plate 107, the sliding rod 110 moves in the opposite direction to compress the spring 112, causing the air outlet 111 to be misaligned with the air supply channel of the connecting pipe 1091, the air path is closed, and the air float head body 109 stops expelling air.

[0049] Simultaneously, the sliding rod 110 drives the connecting rod 204 to reset downwards via the second guide plate 203. Among them, the connecting rods 204 at the four corners drive the limiting plate 206 to descend and reset synchronously via the fixing rod 205; the connecting rod 204 at the middle position descends separately, while its corresponding limiting plate 206 and fixing rod 205 remain in a low position, achieving differentiated reset.

[0050] Those skilled in the art should understand that the above embodiments do not limit the present invention in any way, and all technical solutions obtained by equivalent substitution or equivalent transformation fall within the protection scope of the present invention.

Claims

1. A worktable for detecting the warpage of an electronic light guide plate, comprising a housing (101), characterized in that, It also includes: a sliding frame (103), which is longitudinally slidably connected between the left and right sides of the upper part of the housing (101) to support the laser detector; a drive mechanism, which is installed on the housing (101) to drive the sliding frame (103) to move longitudinally; a laser detector body (105), which is slidably connected to the sliding frame (103) via an electric slide rail (104) to move left and right under the drive of the electric slide rail (104) to scan and detect the light guide plate; four sliding frames (106), which are longitudinally slidably connected inside the housing (101) and can be independently adjusted in position along the longitudinal direction; and twenty-four sliders (108), each of which is a sliding frame. The frame (106) has six sliders (108) that slide horizontally, and their positions can be adjusted independently in the horizontal direction. The number of air float head bodies (109) is the same as that of the sliders (108), and they are respectively set in each slider (108). Their nozzles emerge from the top surface of the slider (108) to spray gas to form air float support. The air passage on / off control component is set in each air float head body (109) to automatically control the air passage status of the corresponding air float point according to the position of the slider (108). The follow-up limit component is set on each slider (108) to automatically rise and limit the light guide plate when the slider (108) moves out.

2. The electronic light guide plate warpage detection workbench according to claim 1, characterized in that, The air circuit on / off control component includes: a connecting pipe (1091) located at the lower end of each air float head body (109), each connecting pipe (1091) having a through air supply channel for connecting to the air supply system; a sliding rod (110) slidably connected to each connecting pipe (1091) along the longitudinal direction, each sliding rod (110) having a vertical air outlet (111); a spring (112) connected between each sliding rod (110) and the corresponding connecting pipe (1091) for driving the corresponding sliding rod (110) to reset; and a first guide plate (107) fixedly connected to... At the bottom of each sliding frame (106); a trigger ball is located at one end of each sliding rod (110) for engaging with the corresponding first guide plate (107); initially, each first guide plate (107) abuts against the trigger ball of the corresponding sliding rod (110), causing each sliding rod (110) to compress the corresponding spring (112), and each air outlet (111) is offset from the corresponding air supply channel; when the slider (108) moves out and the sliding rod (110) disengages from the first guide plate (107), the spring (112) drives the sliding rod (110) to reset, so that the air outlet (111) is aligned with the air supply channel.

3. The electronic light guide plate warpage detection workbench according to claim 2, characterized in that, The four sliding frames (106) are distributed longitudinally and arranged sequentially, defined as the first to fourth rows of sliding frames (106); the first guide plate (107) is symmetrically arranged at the bottom of each sliding frame (106), wherein the first guide plate (107) of the first and third rows of sliding frames (106) is located at the rear side of the bottom of the corresponding sliding frame (106), and the first guide plate (107) of the second and fourth rows of sliding frames (106) is located at the front side of the bottom of the corresponding sliding frame (106); the trigger ball is arranged on each sliding rod (110), wherein the trigger ball in the first and third rows of sliders (108) is located at the rear end of the corresponding sliding rod (110), and the trigger ball in the second and fourth rows of sliders (108) is located at the front end of the corresponding sliding rod (110).

4. The electronic light guide plate warpage detection workbench according to claim 1, characterized in that, The following limiting component includes: limiting plates (206), which are vertically slidably connected to each slider (108), and each limiting plate (206) is right-angled and used to fit the adjacent two sides of the light guide plate; fixing rods (205), which are fixed to the bottom of each limiting plate (206), and the lower end of each fixing rod (205) protrudes from the corresponding slider (108); connecting rods (204), which are slidably connected to the lower end of each fixing rod (205); second guide plates (203), which are fixed to each sliding rod (110), and each second guide plate (203) has an inclined slide rail; the lower end of each connecting rod (204) is embedded in the inclined slide rail of the corresponding second guide plate (203) and is used to convert the longitudinal movement of the corresponding sliding rod (110) into the vertical movement of the corresponding connecting rod (204).

5. The electronic light guide plate warpage detection worktable according to claim 4, characterized in that, Each of the connecting rods (204) and the corresponding fixed rod (205) is provided with a pre-tight friction force, which is greater than the weight of the corresponding fixed rod (205) and less than the thrust that drives the corresponding connecting rod (204) to move.

6. The electronic light guide plate warpage detection worktable according to claim 4, characterized in that, Each slider (108) has two guide grooves (202) and one sliding groove (201) on the side near the corresponding limiting plate (206). Each limiting plate (206) slides vertically between the two guide grooves (202), and the bottom plate of each limiting plate (206) slides up and down in the corresponding sliding groove (201).

7. The electronic light guide plate warpage detection workbench according to claim 3, characterized in that, The drive mechanism includes a motor (1021) and a screw (102). The motor (1021) is symmetrically installed on the rear side of the housing (101). The output shaft of each motor (1021) is fixedly connected to a corresponding screw (102) through a coupling. Each screw (102) is rotatably connected to the housing (101). The sliding frame (103) is threadedly connected to both screws (102).

8. The electronic light guide plate warpage detection worktable according to claim 1, characterized in that, It also includes a locking assembly, which includes a square through-hole (301) on the left side of the housing (101) and four fastening bolts (302) therein. Each fastening bolt (302) is threadedly connected to the corresponding sliding frame (106) to lock the longitudinal position of each sliding frame (106).

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