Quantum dot diffusion plate light transmission uniformity detection equipment

Abstract

The invention relates to the technical field of light transmission detection, in particular to light transmission uniformity detection equipment for a quantum dot diffusion plate. The optical detector assembly is fixedly installed at the top of the side end of the detection table, the light-transmitting source is arranged in the middle of the detection table, a clamp structure is arranged on the surface of the detection table, positioning grooves distributed in a grid shape are formed in the surface of the detection table, and a plurality of detection point positions are formed in the positioning grooves; sliding rods matched with the positioning grooves are arranged at the bottoms of the two rigid supporting plates, when the sliding rods slide to one detection point position, light beams emitted by the light transmitting source can penetrate through the light beam positioning holes to irradiate the pressed quantum dot diffusion plate, and the quantum dot diffusion plate is detected point by point. According to the invention, through orderly movement and positioning of the clamp structure among the detection points, all the light beam positioning holes in the bearing plate are aligned with the light transmission source in sequence, so that pressing and holding of the quantum dot diffusion plate are realized and point-by-point light transmission detection is carried out.

Description

Technical Field

[0001] This invention relates to the field of light transmittance detection technology, and more specifically, to a device for detecting the uniformity of light transmittance of a quantum dot diffuser plate. Background Technology

[0002] As a core optical component in the display field, quantum dot diffusers are widely used in consumer electronics displays (such as televisions and monitors), industrial control displays, and other scenarios. Their function is to achieve uniform light scattering and quantum dot color conversion, thereby improving the color gamut and uniformity of the display. Among them, polycarbonate (PC) has become the mainstream choice for quantum dot diffuser materials due to its excellent temperature resistance and quantum dot dispersion stability.

[0003] When testing the light transmittance of a quantum dot diffuser, the diffuser is placed on a sample testing stage. The testing personnel hold the non-test area of ​​the diffuser and slide it so that different areas on the surface of the diffuser are aligned with the fixed light-transmitting holes on the testing stage in sequence. During this process, the light beam at the bottom of the light-transmitting hole continuously illuminates the currently aligned area, and the detector simultaneously collects data such as light transmittance and haze in that area. After all preset areas have been irradiated and collected, the data is manually sorted to determine whether the light transmittance uniformity of the diffuser is qualified.

[0004] During the fabrication of quantum dot diffusers made of PC material, slight edge warping is easily generated due to factors such as residual stress from die-cutting and differences in interlayer shrinkage in multilayer composite structures. When testing the light transmittance of PC diffusers with slight edge warping, the inconsistent warping angles disrupt the stable illumination between the diffuser and the light beam, causing deviations between the preset detection points and the actual illumination positions of the light beam, resulting in misalignment problems. Furthermore, changes in the optical path length in the warped areas can lead to some areas not being effectively covered, resulting in missed detections. Therefore, there is an urgent need for a quantum dot diffuser light transmittance uniformity testing device to solve the above problems. Summary of the Invention

[0005] This invention provides a device for detecting the light transmittance uniformity of a quantum dot diffuser plate. It uses a clamping structure to press down on the warped edges of the quantum dot diffuser plate, and combines this with a beam positioning hole to define the optical path, aligning the detection point with the beam. This allows the device to acquire complete light transmittance data from the surface of the quantum dot diffuser plate to the greatest extent possible, even in the light transmittance detection of PC quantum dot diffuser plates with slight edge warping, thereby solving the problems mentioned in the background art.

[0006] Quantum dot diffusion plates made of PC material are prone to edge warping during the manufacturing process. When conducting light transmittance tests, the warped edges will affect the test results.

[0007] To achieve the above objectives, the testing equipment includes a testing stage, a photodetector assembly fixedly installed on the top of the side end of the testing stage, and a light source disposed in the middle of the testing stage. The surface of the testing stage is provided with a clamping structure, which is used to support and hold the quantum dot diffusion plate to be tested.

[0008] The surface of the testing platform is provided with positioning grooves distributed in a grid pattern, forming multiple testing points in the positioning grooves. The fixture structure includes two rigid support plates, and the bottom of each of the two rigid support plates is provided with a sliding rod that cooperates with the positioning groove. The sliding rod can slide along the positioning groove and move the fixture structure between the testing points.

[0009] A support plate is provided between the two rigid support plates. The surface of the support plate has multiple beam positioning holes. When the slide rod slides to a detection point, the beam emitted by the light source can pass through the beam positioning holes and irradiate the quantum dot diffusion plate being pressed, so as to detect the quantum dot diffusion plate point by point.

[0010] In the above technical solution, because the fixture structure can press and hold the flattened, warped quantum dot diffuser plate, the positioning groove and the slide bar cooperate to enable the fixture structure to move between the detection points, and the beam positioning hole can limit the light path, so that the light beam of the transmitted light source corresponds to the detection point, thereby solving the misalignment and missed detection problems caused by the warped edge, and realizing accurate point-by-point detection of the diffuser plate.

[0011] Based on this, the beam positioning hole is a circular opening at the end near the light source and a square opening at the end near the clamping cavity. The position and size of the viewing window correspond to the square opening. The area of ​​the square opening in the beam positioning hole is larger than the area of ​​its circular opening, and the diameter of the circular opening is adapted to the illumination surface of the light source.

[0012] Among them, the circular aperture is adapted to the light source illumination surface, which can maximize the collection of light beam and reduce leakage; the square aperture has a larger area, which allows the light beam to spread outward to increase the illumination coverage. Paired with a viewing window that is aligned with the square aperture, the illumination area can be directly confirmed, further ensuring the accuracy of the detection optical path and adapting to the detection needs of quantum dot diffuser plates.

[0013] In addition, the positioning groove includes multiple horizontal grooves and multiple vertical grooves, the detection point is a cross-shaped connection structure formed by the interlacing of horizontal and vertical grooves, and the center of the detection point is provided with a flexibly liftable protrusion.

[0014] The bottom surface of the center of each of the multiple detection points is provided with an inner groove. An elastic element is installed at the bottom of the inner cavity of the inner groove. The top of the elastic element is connected to the bottom of the protrusion. A limiting groove is provided at the bottom of the slide rod. When the slide rod moves to a detection point, the protrusion is engaged in the limiting groove to achieve the positioning of the bearing plate at the detection point.

[0015] This technical solution uses cross-shaped grooves to form detection points, combined with inner grooves, elastic elements, and elastically liftable protrusions. In addition, the limiting groove at the bottom of the slide rod causes the protrusions to be compressed and contracted when the slide rod moves. After the slide rod is in place, the elastic element pushes the protrusions into the limiting groove, thereby positioning the fixture structure at the detection points and providing a positional reference for point-by-point detection.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] 1. In this quantum dot diffuser plate light transmission uniformity testing device, a clamping cavity is formed by the movable assembly of a cover plate and a carrier plate, allowing the quantum dot diffuser plate to be tested to be clamped in the cavity. The clamping position can be adaptively adjusted according to the warping of the edges around the quantum dot diffuser plate, so that the warped areas are effectively pressed flat. At the same time, the position and size of the viewing window on the carrier plate correspond to the square opening of the beam positioning hole, and the viewing range is consistent with the illumination range of the light source. Combined with the partitioning and limiting function of the cover plate, the testing area can be directly observed, reducing the occurrence of missed detections and repeated detections.

[0018] 2. In this quantum dot diffuser plate light transmission uniformity testing device, multiple cross-shaped testing points are formed by the crisscrossing positioning grooves on the surface of the testing stage. The spacing between adjacent testing points matches the center distance between adjacent beam positioning holes on the carrier plate. When the fixture structure slides along the positioning groove via the slide rod, each time a testing point is moved, the engagement structure between the protrusion and the slide rod limiting groove positions the corresponding beam positioning hole and the light source, thereby achieving point-by-point light transmission testing of different areas of the quantum dot diffuser plate. The testing covers the entire surface of the diffuser plate, enabling comprehensive collection of light transmission data from various areas of the quantum dot diffuser plate. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 This is a schematic diagram of the structure of the detection area on the surface of the detection stage in this invention;

[0021] Figure 3 This is a schematic diagram of the disassembled state of the fixture in this invention;

[0022] Figure 4 This is a schematic diagram of the structure of the diffuser plate pressed into an angle by a clamp in this invention;

[0023] Figure 5 This is a schematic diagram of the structure in which the diffuser plate is clamped in the fixture in this invention;

[0024] Figure 6 This is a schematic diagram of the cross-section of the clamp in this invention;

[0025] Figure 7This is a schematic diagram showing the range of the fixed-point beam illumination of the present invention;

[0026] Figure 8 This is a schematic diagram of the structure of the slide bar locking in the positioning groove according to the present invention;

[0027] Figure 9 This is a top view of the testing station in this invention.

[0028] The meanings of the labels in the diagram are as follows:

[0029] 11. Testing stage; 12. Photodetector assembly; 13. Light source; 14. Positioning slot;

[0030] 2. Fixture structure; 20. Slide rod; 21. Rigid support plate; 22. Bearing plate; 23. Cover plate; 24. Beam positioning hole; 25. Clamping cavity; 26. Cover plate positioning hole; 27. Positioning rod; 28. Viewing window; 221. Black bottom panel; 222. Middle layer clamping plate; 223. Flexible support plate;

[0031] 31. Inner groove; 32. Elastic element; 33. Protrusion; 34. Limiting groove; 35. Side cavity; 36. Pulley. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] Currently, in the fabrication of PC quantum dot diffusers, residual shear stress from die-cutting and differences in shrinkage between multilayer composite layers can easily cause slight edge warping in the produced PC quantum dot diffusers. When testing transmittance, this warping disrupts stable beam illumination, causing misalignment between the preset detection point and the actual illumination point. Furthermore, changes in the optical path mean that some areas are not effectively covered, leading to missed detections. Therefore, this invention provides a device for detecting the transmittance uniformity of quantum dot diffusers, see [link to device]. Figures 1-2 As shown, it includes a testing stage 11, which provides a stable mounting and support base for the photodetector assembly 12, the light source 13 and the clamping structure 2. The clamping structure 2 is used to support and hold the quantum dot diffusion plate to be tested. The vertical pressing keeps the diffusion plate flat while limiting the horizontal displacement of the diffusion plate.

[0034] The surface of the testing table 11 is provided with positioning grooves 14 arranged in a grid pattern to provide a moving path for the slide rod 20. At the same time, multiple testing points are formed by the interlacing of horizontal and vertical grooves to provide a reference for the positioning of the fixture structure 2. Multiple testing points are formed in the positioning grooves 14. The fixture structure 2 includes two rigid support plates 21 for stable support of the bearing plate 22. The bottom of each of the two rigid support plates 21 is provided with a slide rod 20 that cooperates with the positioning grooves 14. The slide rod 20 can slide along the positioning grooves 14 and move the fixture structure 2 between the testing points.

[0035] When the slider 20 slides to a detection point, the light beam emitted by the light source 13 can pass through the beam positioning hole 24 and illuminate the quantum dot diffuser plate that is being pressed. The quantum dot diffuser plate is detected point by point. By matching the distance between the detection point and the beam positioning hole 24, the integrity and accuracy of the light transmission uniformity detection data are ensured.

[0036] Due to residual stress from die-cutting during the manufacturing process and differences in interlayer shrinkage in multi-layer composite structures, PC quantum dot diffuser plates are prone to slight edge warping at the corners. This warping is minor and can be fixed or offset during subsequent display module assembly, without affecting the actual performance. However, during light transmittance testing, this slight warping can disrupt the stable relative position between the diffuser plate and the light source 13 and the photodetector assembly 12. Furthermore, the optical path difference between the warped area and the flat area can cause misalignment between the preset detection point and the actual beam illumination position. Therefore, the quantum dot diffuser plate is partitioned and positioned during the testing process using the fixture structure 2.

[0037] Specifically, such as Figure 3 and Figure 4 As shown, the carrier plate 22 is horizontally installed between two rigid support plates 21, and the cover plate 23 is installed on top of the carrier plate 22 in an openable assembly manner. After the two are assembled, the distance between them forms a cavity 25. When the quantum dot diffusion plate to be tested is tested for light transmittance, it will be placed horizontally in the cavity 25. At this time, the cover plate 23 will apply vertical pressure to the quantum dot diffusion plate in the cavity 25, forcing the slightly warped edges of the quantum dot diffusion plate to adhere to the surface of the carrier plate 22. It should be noted that the surface of the cover plate 23 has several viewing windows 28, and the viewing windows 28 and the light on the carrier plate 22 are... The beam positioning holes 24 are aligned and correspond in number, making the cover plate 23 appear hollow. Based on the hollow structure, when the cover plate 23 presses the quantum dot diffuser plate, its placement position in the clamping cavity 25 can be adjusted according to the warped edge position of the diffuser plate. There is no need to align the quantum dot diffuser plate with the beam positioning holes 24 or the viewing window 28 in advance; it can simply be placed horizontally according to the warped edge. This setting can achieve the flattening of the warped edge of the diffuser plate through the pressure of the cover plate 23, and can also use the correspondence between the viewing window 28 and the beam positioning holes 24 to detect and partition the quantum dot diffuser plate.

[0038] like Figure 5 As shown in the figure, the shaded area represents the quantum dot diffusion plate. In this state, it is only necessary to perform light transmittance detection on the visible window 28 position that overlaps with the shaded area. The solid area on the surface of the cover plate 23 without the visible window 28 is negligible because its area is small.

[0039] Specifically, the core of light transmission uniformity detection is to assess the overall uniformity by collecting light transmission data of the main area of ​​the quantum dot diffuser plate, allowing for a very small proportion of non-detection areas (the error range is usually within 1%). The solid area of ​​the cover plate 23 is designed to have a low area ratio, which does not affect the core area of ​​uniformity judgment. At the same time, combined with the pressing effect of the clamping cavity 25 on the quantum dot diffuser plate, the quantum dot diffuser plate is in a flat state. The small area covered by the solid area will not interfere with the light transmission data of the main detection area. Therefore, the detection of this part of the area will not affect the accuracy of the overall light transmission uniformity assessment, so it can be ignored.

[0040] As is well known to those skilled in the art, the light beam emitted by the light source 13 forms a standardized light field through its own irradiation surface. The propagation path and irradiation range of the light beam are limited by the beam aperture preset by the device. The quantum dot diffuser to be tested is located between the light source 13 and the photodetector assembly 12. After the light beam passes through the diffuser, the photodetector assembly 12 captures the transmitted light and converts it into an electrical signal. The electrical signal is then analyzed by the built-in processing module of the device to calculate key optical parameters such as transmittance and haze.

[0041] See Figure 6 and Figure 7 As shown, the beam positioning hole 24 penetrates the support plate 22. The end of the beam positioning hole 24 near the light source 13 is a circular opening. The diameter of the circular opening is adapted to the size of the irradiation surface of the light source 13, so that the beam emitted by the light source 13 can enter the beam positioning hole 24 to the maximum extent and reduce beam leakage. The end of the beam positioning hole 24 near the clamping cavity 25 is a square opening. The area of ​​the square opening is larger than that of the circular opening, so that the beam positioning hole 24 has a structure that gradually expands outward from the circular opening to the square opening. This allows the irradiation range of the beam to gradually expand as it passes through the channel, improving the coverage of the corresponding area of ​​the quantum dot diffuser plate in the clamping cavity 25. At the same time, the viewing window 28 on the surface of the support plate 22 corresponds one-to-one with the square opening in position and has the same size. The irradiation of the diffuser plate by the beam at the square opening can be directly observed through the viewing window 28, ensuring that the actual irradiation area of ​​the beam is consistent with the preset detection area, providing a stable beam path and an observable irradiation range for light transmittance detection.

[0042] Combined again Figure 7As shown, the support plate 22 adopts a three-layer stacked structure, consisting of a black bottom panel 221, a middle layer clamping plate 222, and a flexible support plate 223 from bottom to top. The black bottom panel 221, as the base layer of the support plate 22, is directly opposite the surface of the detection stage 11 and can absorb stray beams emitted by the light source 13, reducing interference from non-detection beams to the photodetector assembly 12. The middle layer clamping plate 222 is located above the black bottom panel 221, and its thickness is adapted to the rigid support plate 21 to provide sufficient structural rigidity, ensuring the hole position accuracy and shape stability of the beam positioning hole 24. The top flexible support plate 223, as the top layer, is in direct contact with the quantum dot diffuser plate in the cavity 25. It can adapt to the warping of the diffuser plate, so that the diffuser plate is in contact with the surface of the support plate 22. The flexible surface can reduce damage to the quantum dot diffuser plate. The black bottom panel 221, the middle layer clamping plate 222, and the flexible support plate 223 are stacked to form a whole, providing a stable contact base and optical path environment for light transmittance detection.

[0043] Back Figure 4 As can be seen, the four corners of the support plate 22 and the cover plate 23 correspond to each other, and the cover plate positioning holes 26 are opened through the diagonal corners. The positioning rod 27 is made of a lightweight material (such as ABS resin), and its outer dimensions are precisely matched with the inner wall dimensions of the cover plate positioning holes 26. It is also equipped with a cap on the top. The positioning rod 27 passes through the cover plate positioning holes 26 on the cover plate 23 and the support plate 22 from top to bottom. The positioning rod 27 can reduce the relative horizontal displacement between the cover plate 23 and the support plate 22 during the detection process. The lightweight nature of the positioning rod 27 can reduce the pressure loss on the quantum dot diffuser plate while achieving the positioning effect, and further maintain the alignment of the viewing window 28 on the cover plate 23 and the beam positioning hole 24 on the support plate 22.

[0044] The positioning groove 14 is composed of multiple parallel horizontal grooves and multiple parallel vertical grooves intersecting each other. The intersections of the horizontal and vertical grooves form a cross-shaped connection structure, which serves as the detection point. The bottom surface of each detection point is recessed downwards at its center to form an inner groove 31. Figure 8 As shown, an elastic element 32 (such as a spiral spring) is fixedly installed at the bottom of the inner cavity of the inner groove 31. The top of the elastic element 32 is connected to the bottom of the protrusion 33, so that the protrusion 33 can be elastically raised or contracted along the axial direction of the inner groove 31. The bottom of the slide rod 20 supporting the rigid support plate 21 is provided with a limiting groove 34 that is adapted to the protrusion 33.

[0045] When adjusting the detection point, the slide bar 20 moves within the positioning groove 14. As the slide bar 20 approaches the detection point, the bottom edge of the slide bar 20 presses against the top of the protrusion 33. The protrusion 33 is compressed and retracted into the inner groove 31 by the bottom of the slide bar 20. At this time, the elastic element 32 is in a compressed state. When the slide bar 20 moves to the center of the detection point, the limiting groove 34 corresponds to the position of the protrusion 33. The top of the elastic element 32 has no pressing force, and the elastic element 32 will release the elastic force to push the protrusion 33 upward and lock it into the limiting groove 34, fixing the slide bar 20 at the detection point. At this time, the beam positioning hole 24 on the carrier plate 22 is aligned with the center of the light source 13.

[0046] When it is necessary to change the test point, under the action of external force (including but not limited to manual pushing by the staff), the entire clamp structure 2 is pushed to slide on the test table 11. The slide rod 20 continues to move in the positioning groove 14, and its bottom edge squeezes the protrusion 33 to retract into the inner groove 31. The elastic element 32 is compressed again. When the slide rod 20 moves away from the test point, the protrusion 33 will rise and return to its original protruding state. This cyclical structure provides a stable position reference for point-by-point light transmittance testing.

[0047] Combined again Figure 8 As shown, the inner wall of the positioning groove 14 has a side cavity 35 along its length, which is connected to the inner cavity of the positioning groove 14. Four pulleys 36 are symmetrically installed on the surface of the slide rod 20 (the pulleys 36 can rotate on the side end of the slide rod 20). The four pulleys 36 are respectively set in the side cavities 35 of the inner wall of the positioning groove 14. Before sliding, when the slide rod 20 is not moving, the four pulleys 36 are embedded in the adjacent side cavities 35 and keep in contact with the groove wall of the side cavity 35, which can limit the vertical movement direction of the slide rod 20 in the positioning groove 14. During positioning, the slide rod 20 moves to the detection point. The slide rod 20 is positioned by engaging with the limiting groove 34 through the protrusion 33. At this time, the pulley 36 is still located in the side cavity 35 and maintains a static state of rolling contact, without interfering with the engagement and positioning of the protrusion 33 and the limiting groove 34. After sliding, when the slide rod 20 continues to move to the subsequent detection point, the pulley 36 rolls along the groove wall of the side cavity 35, driving the slide rod 20 to move smoothly in the positioning groove 14. The rolling contact replaces the sliding friction, which can reduce the resistance when the slide rod 20 moves, reduce the wear between the slide rod 20 and the inner wall of the positioning groove 14, and ensure the smooth movement of the fixture structure 2 between each detection point.

[0048] The improvements are: See Figure 9As shown, the straight-line distance between two adjacent detection points is spacing a, and the straight-line distance between the centers of two adjacent beam positioning holes 24 on the support plate 22 is distance b. Spacing a and distance b are equal in value. Before sliding, the slide rod 20 of the fixture structure 2 will be locked at one of the detection points. At this time, the beam positioning hole 24 at the corresponding position on the support plate 22 is aligned with the center of the light source 13. When the slide rod 20 slides along the positioning groove 14, since spacing a and distance b are equal, the slide rod 20 moves one spacing a and reaches the next detection point. When the position is reached, the protrusion 33 engages again in the limiting groove 34 to complete the locking. At this time, the adjacent beam positioning hole 24 on the carrier plate 22 is aligned with the center of the light source 13. After sliding, the detection corresponding to the beam positioning hole 24 is completed. When the slide bar 20 continues to move, each time it moves by a distance a and is locked by the protrusion 33, the subsequent beam positioning hole 24 on the carrier plate 22 will be aligned with the center of the light source 13. In this way, the omission or duplication of the detection area can be minimized, and the coverage and data integrity of the light transmittance detection can be improved.

[0049] Working principle:

[0050] First, the PC quantum dot diffuser plate to be tested is placed horizontally into the cavity 25 formed by the carrier plate 22 and the cover plate 23. The cover plate 23 is aligned with the carrier plate 22 by the cooperation of the positioning rod 27 and the cover plate positioning hole 26. At the same time, the cover plate 23 applies vertical pressure, so that the slightly warped edge area of ​​the diffuser plate is attached to the surface of the flexible support plate 223 of the carrier plate 22, thus completing the pressing and flattening of the diffuser plate and the horizontal limitation. The placement position of the diffuser plate can be flexibly adjusted according to the warped edge position, without the need to pre-align the beam positioning hole 24 or the viewing window 28.

[0051] Next, the clamping structure 2 is pushed so that the slide rod 20 moves along the crisscrossing positioning grooves 14 on the surface of the detection table 11. When the slide rod 20 moves to any detection point, the limiting groove 34 at the bottom of the slide rod 20 corresponds to the position of the protrusion 33. The elastic element 32 releases its elastic force to push the protrusion 33 into the limiting groove 34, thereby locking the clamping structure 2. Since the distance between adjacent detection points is equal to the center distance between adjacent beam positioning holes 24 on the carrier plate 22, after locking, the corresponding beam positioning holes 24 on the carrier plate 22 can be directly aligned with the light source 13.

[0052] At this time, the light beam emitted by the light source 13 enters the channel through the circular opening of the beam positioning hole 24, expands the irradiation range through the square opening of the outward expansion structure, and covers the corresponding area of ​​the diffuser plate. During this process, the irradiation situation can be observed through the viewing window 28 aligned with the square opening. It should be noted that during the detection, only the area of ​​the viewing window 28 overlapping with the quantum dot diffuser plate needs to be detected.

[0053] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A quantum dot diffuser plate transmittance uniformity detection device, comprising a detection stage (11), a photodetector assembly (12) fixedly installed on the top side of the detection stage (11), and a light source (13) disposed in the middle of the detection stage (11), characterized in that: The surface of the testing stage (11) is provided with a clamping structure (2), which is used to support and hold the quantum dot diffusion plate to be tested; The surface of the testing platform (11) is provided with a grid-like distribution of positioning grooves (14), and multiple testing points are formed in the positioning grooves (14). The fixture structure (2) includes two rigid support plates (21). The bottom of each of the two rigid support plates (21) is provided with a sliding rod (20) that cooperates with the positioning groove (14). The sliding rod (20) can slide along the positioning groove (14) and move the fixture structure (2) between the testing points. A support plate (22) is provided between the two rigid support plates (21). The surface of the support plate (22) is provided with multiple beam positioning holes (24). When the slide rod (20) slides to a detection point, the beam emitted by the light source (13) can pass through the beam positioning hole (24) and irradiate the quantum dot diffuser plate that is being pressed, so as to detect the quantum dot diffuser plate point by point.

2. The quantum dot diffuser plate transmittance uniformity detection device according to claim 1, characterized in that: A cover plate (23) is movably installed on the top of the support plate (22), and a cavity (25) is formed between the cover plate (23) and the support plate (22). The cavity (25) is used to store the quantum dot diffusion plate to be tested. Several viewing windows (28) are opened on the surface of the support plate (22).

3. The quantum dot diffuser plate transmittance uniformity detection device according to claim 2, characterized in that: The beam positioning hole (24) is a circular opening at one end near the light source (13), and a square opening at the other end near the clamping cavity (25). The position and size of the viewing window (28) correspond to the square opening.

4. The quantum dot diffuser plate transmittance uniformity detection device according to claim 3, characterized in that: The area of ​​the square aperture in the beam positioning hole (24) is larger than the area of ​​its circular aperture, and the diameter of the circular aperture is adapted to the illumination surface of the light source (13).

5. The quantum dot diffuser plate transmittance uniformity detection device according to claim 1, characterized in that: The support plate (22) is composed of a black bottom panel (221), a middle layer plate (222) and a flexible support plate (223) stacked together.

6. The quantum dot diffuser plate transmittance uniformity detection device according to claim 2, characterized in that: The corresponding end corners of the bearing plate (22) and the cover plate (23) are provided with cover plate positioning holes (26), and a positioning rod (27) that is in contact with the inner wall of the cover plate positioning hole (26) is slidably arranged inside the cover plate positioning hole (26).

7. The quantum dot diffuser plate transmittance uniformity detection device according to claim 1, characterized in that: The positioning groove (14) includes multiple horizontal grooves and multiple vertical grooves. The detection point is a cross-shaped connection structure formed by the interlacing of horizontal and vertical grooves. The center of the detection point is provided with a boulder (33) that can be elastically lifted.

8. The quantum dot diffuser plate transmittance uniformity detection device according to claim 7, characterized in that: An inner groove (31) is provided on the bottom surface of the center of each of the multiple detection points. An elastic element (32) is installed at the bottom of the inner cavity of the inner groove (31). The top of the elastic element (32) is connected to the bottom of the protrusion (33). A limiting groove (34) is provided at the bottom of the slide rod (20). When the slide rod (20) moves to a detection point, the protrusion (33) is inserted into the limiting groove (34) to realize the positioning of the bearing plate (22) at the detection point.

9. The quantum dot diffuser plate transmittance uniformity detection device according to claim 7, characterized in that: The inner wall of the positioning groove (14) is provided with a side cavity (35), and four pulleys (36) are rotatably provided on the surface of the slide rod (20). When the slide rod (20) moves inside the positioning groove (14), the pulleys (36) are located in the adjacent side cavity (35) and roll in contact with the groove wall.

10. The quantum dot diffuser plate transmittance uniformity detection device according to claim 1, characterized in that: The spacing a between adjacent detection points is equal to the center distance b between adjacent beam positioning holes (24) on the carrier plate (22).

Images