Real-time detection equipment for light transmittance of microcrystalline powder diffusion sheet

Abstract

The invention relates to the technical field of light transmission detection, in particular to real-time detection equipment for the light transmittance of a microcrystalline powder diffusion sheet. Comprising a base, a light source module and a bearing plate located on the base, a light transmitting hole is formed in the bearing plate, a light sensing module is arranged in the base corresponding to the light transmitting hole, supporting mechanisms are arranged on the two sides of the bearing plate, and each supporting mechanism comprises a supporting plate, an abutting plate and a locking part. The diffusion sheet is horizontally pushed through the pushing plate, meanwhile, the abutting plate exerts pushing force on the supporting plate to drive the supporting plate to move upwards so as to increase the height of the diffusion sheet, the diffusion sheet is continuously pushed in cooperation with the pushing plate, the diffusion sheet is in an inclined posture with one end being tilted and the other end being sunk, and the diffusion sheet enables the cambered surface to correspond to the light hole through the rotation angle. The incident angle between the light source projected from the upper part and the cambered surface is reduced, so that the interference of refraction or reflection of the light source is reduced, and the accuracy of a detection result is improved.

Description

Technical Field

[0001] This invention relates to the field of light transmittance detection technology, and more specifically, to a real-time light transmittance detection device for microcrystalline powder diffuser sheets. Background Technology

[0002] The core function of a diffuser is to adjust light transmittance and scattering effect. Testing transmittance quantifies its light-carrying capacity. For example, in display panels, transmittance must be ≥85% to maintain screen brightness; in lighting, the thickness of the microcrystalline powder coating needs to be adjusted according to scene requirements (e.g., soft lighting requires 70%-85% transmittance). The aim is to avoid excessively high transmittance causing glare, or too low transmittance affecting display clarity / lighting efficiency. Furthermore, in the smart home field, microcrystalline powder diffusers can be integrated into irregularly shaped lamps such as round and elliptical ones, achieving precise light control through curvature matching.

[0003] In existing technologies, when testing the transmittance of a diffuser sheet, the diffuser sheet is first placed flat on the sample stage to ensure that there are no scratches, bubbles or foreign objects obstructing it. The position is then adjusted so that the test area covers the target coating. Then, the type of light source (such as CIE-D65 simulated sunlight) is selected according to the standard, and the test mode (real-time monitoring or single measurement) is set.

[0004] Therefore, for a flat diffuser, light transmission detection can be achieved by moving the diffuser through the light-transmitting hole. However, for some lighting fixtures, the outer edge of the diffuser has a certain curvature. When light is emitted from the top and shines on the diffuser through the light-transmitting hole, the curved surface will cause the light to refract or reflect, causing the light to not propagate along the expected path, thus affecting the accuracy of the diffuser's light transmission detection. Summary of the Invention

[0005] This invention provides a real-time light transmittance detection device for microcrystalline powder diffuser sheets. The device uses a support plate to push the diffuser sheet out and a pusher plate to push the diffuser sheet, causing the diffuser sheet to tilt. This solves the problem mentioned in the background art, namely, that the curved surface will cause light to refract or reflect, causing the light to be unable to propagate along the expected path, thus affecting the accuracy of light transmittance detection of the diffuser sheet.

[0006] To achieve the above objectives, the real-time transmittance detection device for a microcrystalline powder diffuser sheet includes a base, a light source module, and a support plate located on the base. The support plate has light-transmitting holes, and a photosensitive module is installed in the base corresponding to the light-transmitting holes. Support mechanisms are provided on both sides of the support plate. The support mechanism includes a support plate, a push plate, and a locking part. One end of the support plate is slidably connected to the base, and the other end is rotatably connected to the locking part. The locking part is used to fix the symmetrical edges of the diffuser sheet, so that the diffuser sheet and the locking part are integrated.

[0007] During the testing process, the bottom of the support plate is rotatably connected to one end of the push plate, and the other end of the push plate abuts against a pushing mechanism. The pushing mechanism pushes the diffuser sheet to one side by translation, so that the flat surface of the diffuser sheet passes over the light-transmitting hole. When the curved surface of the diffuser sheet moves to the light-transmitting hole, the pushing mechanism drives the push plate to push the support plate upward. Then, in conjunction with the pushing mechanism, one end of the diffuser sheet is restricted, forcing the diffuser sheet and the locking part to form a state where one end is raised and the other end is sunken, so that the curved surface of the diffuser sheet is close to the light-transmitting hole.

[0008] In the above technical solution, the pushing mechanism includes a translation plate that is slidably disposed on the surface of the base. The two ends of the translation plate are located inside the slide rail. The two ends of the translation plate are respectively fixedly connected to the telescopic ends of the cylinder, and the cylinder is fixed on the base.

[0009] The pushing mechanism also includes a push plate fixed in the middle of the translation plate. The push plate is L-shaped and has a limit block fixed on its top. The limit block is placed on one of the equally spaced points of the diffuser. During the translation phase, the push plate is used to push the diffuser to move, and the limit block is used to limit the diffuser from tilting up.

[0010] Based on the above, the push plate is inclined, with the rotatable connection between it and the support plate being an upturned end and the other end being a recessed end. A limiting groove is provided on the auxiliary upright plate corresponding to the rotatable connection between the push plate and the support plate. The limiting groove is used to guide the push plate to move upward, so that the support plate moves upward in the vertical direction, thereby raising the height of the diffuser plate.

[0011] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0012] 1. In this real-time transmittance detection device for microcrystalline powder diffuser sheets, a push plate is used to horizontally push the diffuser sheet, while a push plate applies a pushing force to the support plate, causing the support plate to move upward to raise the height of the diffuser sheet. With the push plate continuously pushing the diffuser sheet, the diffuser sheet forms an inclined posture with one end raised and the other end lowered. The diffuser sheet rotates to make the arc surface correspond to the light-transmitting hole, reducing the incident angle between the light source projected from above and the arc surface, thereby reducing the interference of light source refraction or reflection and improving the accuracy of the detection results.

[0013] 2. In this real-time transmittance detection device for microcrystalline powder diffuser sheets, the diffuser sheet is driven to rotate by an external roller, so that the light-transmitting hole scans the corresponding sweeping area once, thereby realizing the detection of transmittance at different positions of the diffuser sheet and improving the detection speed. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0015] Figure 2 This is a right view of the overall structure of the present invention;

[0016] Figure 3 This is a schematic diagram illustrating the principle by which the inner and outer rollers of the present invention lock the diffuser sheet.

[0017] Figure 4 This is a schematic diagram of the initial state of the diffuser sheet of the present invention;

[0018] Figure 5 This is a schematic diagram of the translation state of the diffuser sheet of the present invention;

[0019] Figure 6 This is a schematic diagram illustrating the diffusion plate movement principle of the present invention;

[0020] Figure 7 This is a schematic diagram illustrating the lifting principle of the support plate of the present invention;

[0021] Figure 8 This is a schematic diagram of the tilted diffuser sheet of the present invention.

[0022] The meanings of the labels in the diagram are as follows:

[0023] 100. Base; 101. Light source module; 102. Support plate;

[0024] 110. Support mechanism; 111. Support plate; 112. Push plate; 113. Auxiliary upright plate; 114. Slide rail; 115. Column; 116. Limiting groove;

[0025] 120. Pushing mechanism; 121. Translation plate; 122. Pushing plate; 123. Limiting block; 124. Cylinder; 125. Partition plate;

[0026] 130. Rotating plate; 131. Motor;

[0027] 140. Inner roller; 141. Outer roller; 142. Lead screw; 143. Adapter plate. Detailed Implementation

[0028] The technical solutions of this invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0029] For diffusers with a flat surface, light transmission can be detected by moving the diffuser through the light-transmitting hole. However, for some lighting fixtures, the outer edge of the diffuser has a certain curvature. When light is emitted from the top and shines on the diffuser through the light-transmitting hole, the curved surface will cause the light to refract or reflect, causing the light to not propagate along the expected path, thus affecting the accuracy of light transmission detection.

[0030] Therefore, in view of the above-mentioned problems, the present invention provides a real-time transmittance detection device for microcrystalline powder diffuser sheets, with reference to... Figure 1 , Figure 2 As shown, the system includes a base 100, a light source module 101, and a support plate 102 located on the base 100. The support plate 102 has a light-transmitting hole, and a photosensitive module (not shown in the figure) is provided in the base 100 corresponding to the light-transmitting hole. First, the diffuser is placed flat on the support plate 102. The light source is released into the light-transmitting hole through the light source module 101. The light source hits the diffuser and passes through the diffuser. The light source located on the back of the diffuser is sensed by the photosensitive module in the base 100. Then, the photosensitive module measures the light transmittance of the diffuser at the position of the light-transmitting hole. The light transmittance at the measured position is displayed in real time on the display screen for observation.

[0031] Secondly, based on the above diagrams, and combined with Figure 3 , Figure 4 As shown, during actual measurement, support mechanisms 110 are provided on both sides of the support plate 102. Each support mechanism 110 includes a support plate 111, a push plate 112, and a locking part. One end of the support plate 111 is slidably connected to the base 100, and the other end is rotatably connected to the locking part. The locking part is used to fix the symmetrical edges of the diffuser sheet, making the diffuser sheet and the locking part a single unit, preventing the diffuser sheet from shifting during testing. During testing, the bottom of the support plate 111 is rotatably connected to the push plate 112. At one end of 12, the push plate 112 abuts against the other end of the push mechanism 120. The push mechanism 120 pushes the diffuser sheet to one side by translation, so that the flat surface of the diffuser sheet passes over the light-transmitting hole. When the curved surface of the diffuser sheet moves to the light-transmitting hole, the push mechanism 120 drives the push plate 112 to push the support plate 111 upward. Then, the push mechanism 120 restricts one end of the diffuser sheet, forcing the diffuser sheet and the locking part to form a state where one end is raised and the other end is sunken, so that the curved surface of the diffuser sheet is close to the light-transmitting hole.

[0032] The support plate 111 is slidably connected to an auxiliary upright plate 113 at one end, and rotatably connected to a rotating plate 130 at the other end. The bottom section of the auxiliary upright plate 113 is T-shaped and slidably connected to a slide rail 114. The slide rail 114 has a groove that matches the bottom of the auxiliary upright plate 113. The slide rail 114 is fixed to the base 100, and the locking part is set on the rotating plate 130. Therefore, in the initial stage, the diffuser to be tested is placed on the support plate 102. Then, the locking parts on both sides fix the edge of the diffuser to prevent the diffuser from shifting to both sides when moving horizontally. Moreover, after the transmittance at the center of the diffuser is detected, the support plate 111 slides in the slide rail 114 by translating the diffuser. The diffuser, the locking part, and the support plate 111 move synchronously, and the flat surface of the diffuser passes through the light-transmitting hole. This allows for light transmittance detection at different positions of the diffuser, improving the detection range.

[0033] It should be understood that the above-mentioned diffusion sheet movement process refers to... Figure 4 , Figure 5 As shown, Figure 4 The image shows the diffuser sheet in its stationary state, while... Figure 5 The image shows the diffuser after it has been moved, meaning that the light-transmitting hole and the diffuser are now misaligned.

[0034] Furthermore, the locking part includes an inner roller 140, an outer roller 141, and a lead screw 142 threadedly connected to the rotating plate 130. The distal end of the lead screw 142 is rotatably connected to a transition plate 143. The bottom of the transition plate 143 is rotatably connected to the inner roller 140. The inner rollers 140 are symmetrically arranged, and the outer roller 141 is rotatably connected to the rotating plate 130. The outer roller 141 is located at the equidistant points of the diffuser plate to cooperate with the inner rollers 140 on both sides to achieve three-point fixation of the diffuser plate. That is, after the diffuser plate is placed on the support plate 102, by rotating the knob at the end of the lead screw 142, the lead screw 142 drives the transition plate 143 to move closer to the outer roller 141. The inner rollers 140 on both sides are close to the inner wall of the diffuser plate, while the outer roller 141 contacts the equidistant points of the diffuser plate. In this way, the inner rollers 140 on both sides and the outer roller 141 fix the diffuser plate at the equidistant points, so that the diffuser plate and the rotating plate 130 are integrated.

[0035] Next, since a motor 131 is fixedly mounted on the rotating plate 130 on the opposite side of the outer roller 141, when the diffuser plate moves to... Figure 5 In the indicated state, motor 131 is started, and motor 131 drives the outer roller 141 to rotate via belt, causing the diffuser to rotate counterclockwise. During this process, a swept area is formed on the diffuser corresponding to the light-transmitting hole (refer to the shaded area). At this time, the distance between the light-transmitting hole and the axis of the diffuser is... As the diffusion plate's translational distance increases, the light-transmitting aperture gradually moves away from the diffuser plate's axis. This process continues until the distance between the light-transmitting aperture and the diffuser plate's axis is... , , ...until the flat surface of the diffuser sheet is completely covered, thereby improving the light transmittance detection at different locations on the diffuser sheet and increasing detection efficiency.

[0036] Furthermore, returning to Figure 2 and Figure 4 As shown, the structure of the pushing mechanism 120 is disclosed. The pushing mechanism 120 includes a translation plate 121 slidably disposed on the surface of the base 100. Both ends of the translation plate 121 are located inside the slide rail 114. The extension and retraction ends of the cylinder 124 are respectively fixedly connected to both ends of the translation plate 121, and the cylinder 124 is fixed on the base 100. On the other hand, based on Figure 4 Based on and then combined Figure 6 As shown, the pushing mechanism 120 also includes a push plate 122 fixed in the middle of the translation plate 121. The push plate 122 is L-shaped, and a limit block 123 is fixedly installed on the top. The limit block 123 is placed on one of the equally spaced points of the diffuser. During the translation phase, the push plate 122 is used to push the diffuser to move, and the limit block 123 is used to limit the diffuser from tilting up. The specific working principle is as follows:

[0037] After the two equally spaced points of the diffuser are fixed, the cylinder 124 pulls the translation plate 121 to move, and the push plate 122 horizontally pushes the diffuser to one side. During this process, the flat surface of the diffuser gradually passes over the light-transmitting hole. Figure 6 The diagram shows the diffusion sheet moving process. Each time it moves by the diameter of a light-transmitting hole, the outer roller 141 drives the diffusion sheet to rotate, so that the light-transmitting hole scans the corresponding sweeping area once, thereby realizing the detection of the light transmittance at different positions of the diffusion sheet and improving the detection speed.

[0038] As the diffuser sheet moves further to one side, to prevent one side of the diffuser sheet from detaching from the support plate 102 and becoming suspended, the weight of the diffuser sheet on the suspended side is greater than the mass of the diffuser sheet on the support plate 102. Under the action of gravity, the diffuser sheet will tilt to one side, thus affecting the light transmittance detection. Therefore, by setting the limiting block 123, the limiting block 123 holds the diffuser sheet at the tilted end to prevent the diffuser sheet from tilting up at one end and sinking down at the other end, which would affect the accuracy of the detection results.

[0039] Next, the vertical distance between the push plate 122 and the bottom of the support plate 102 is greater than the thick end of the support plate 102. The purpose of this is that as the displacement distance of the diffuser increases, the arc surface of the diffuser gradually approaches the light-transmitting hole. The vertical distance is used to accommodate the support plate 102 and prevent the push plate 122 from hitting the support plate 102 during the translation process, which would affect the push plate 122's pushing of the diffuser.

[0040] Combination Figure 7As shown, the push plate 112 is inclined, with the rotatable connection between it and the support plate 111 being the raised end and the other end being the sunken end. When the auxiliary upright plate 113 slides to the end of the inner groove of the slide rail 114, the auxiliary upright plate 113 is stopped from sliding. At this time, the light-transmitting hole is close to the arc surface of the diffuser. Since the auxiliary upright plate 113 corresponding to the rotatable connection between the push plate 112 and the support plate 111 has a limiting groove 116, when the push plate 112 applies a pushing force to the support plate 111, the limiting groove 116 is used to guide the push plate 112 to move upward, so that the support plate 111 moves upward in the vertical direction, thereby driving the rotating plate 130 to move upward, that is, the two equidistant points of the diffuser to move upward.

[0041] The push plate 112 is powered by the translation plate 121. A column 115 is fixedly installed on the push plate 112 at the lower end. Baffles 125 are symmetrically attached to the outside of the column 115 on both sides. The baffles 125 are fixed to the translation plate 121. The baffles 125 away from the auxiliary vertical plate 113 are used to apply a pushing force to the column 115, and the baffles 125 close to the auxiliary vertical plate 113 are used to limit the displacement of the column 115. In this way, when the diffuser starts to move, since the auxiliary vertical plate 113 is slidably connected to the slide rail 114, the push plate 122 is attached to the diffuser, and is affected by the overall gravity of the support plate 111, when the push plate 122 applies a pushing force to the diffuser, the push plate 122 pushes the diffuser to slide on the support plate 102, while the push plate 112, together with the push plate 122, forces the auxiliary vertical plate 113 to slide in the slide rail 114. During this process, the diffuser does not rise.

[0042] It should be noted that when the diffuser rotates, it will cause vibration. The partitions 125 set on both sides of the auxiliary plate 113 restrict the movement of the push plate 112 and prevent the auxiliary plate 113 from sliding in the slide rail 114, which would affect the detection.

[0043] When the auxiliary upright plate 113 moves to the end of the chute, it stops moving, while the push plate 122 continues to push the diffuser sheet. The push plate 112 pushes the support plate 111 to move. Under the action of the limiting groove 116, the push plate 112 is guided to move upward, raising the support plate 111. The partition plate 125 holds one end of the diffuser sheet against the support plate, and the push plate 122 pushes the diffuser sheet further. The curved surface of the diffuser sheet slides on the light-transmitting hole. The end of the diffuser sheet away from the light-transmitting hole tilts upward, and the end closer to the light-transmitting hole sinks down. The state of the diffuser sheet is referenced. Figure 8 As shown; in this way, the incident angle between the light source projected from above and the curved surface is reduced, thereby improving the accuracy of the detection results;

[0044] In other words, the diffuser is horizontally pushed by the push plate 122, while the push plate 112 applies a pushing force to the support plate 111, causing the support plate 111 to move upward to raise the height of the diffuser. With the push plate 122 continuously pushing the diffuser, the diffuser forms an inclined posture with one end raised and the other end lowered. The diffuser rotates to make the arc surface correspond to the light-transmitting hole, reducing the incident angle between the light source projected from above and the arc surface, thereby reducing the interference of light source refraction or reflection and improving the accuracy of the detection results.

[0045] Then, repeat the above process, that is, return to Figure 5 As shown, the outer roller 141 drives the diffuser sheet in an inclined state to rotate, so that the entire arc surface of the diffuser sheet passes through the light-transmitting hole, thereby realizing the detection of the light transmittance of the arc surface; finally, after the detection is completed, the push plate 122 is moved in the opposite direction to return to the prompting position, and then the diffuser sheet can be removed.

[0046] 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 real-time transmittance detection device for microcrystalline powder diffuser sheets, comprising a base (100), a light source module (101), and a support plate (102) located on the base (100), the support plate (102) having a light-transmitting hole, and a photosensitive module disposed in the base (100) corresponding to the light-transmitting hole, characterized in that: Support mechanisms (110) are provided on both sides of the support plate (102). The support mechanism (110) includes a support plate (111), a push plate (112), and a locking part. One end of the support plate (111) is slidably connected to the base (100), and the other end is rotatably connected to the locking part. The locking part is used to fix the edges of the symmetrical ends of the diffuser, so that the diffuser and the locking part are integrated. During the testing process, the bottom of the support plate (111) is rotatably connected to one end of the push plate (112), and the other end of the push plate (112) is abutted against the push mechanism (120). The push mechanism (120) pushes the diffuser sheet to one side by translation, so that the flat surface of the diffuser sheet passes over the light-transmitting hole. When the arc surface of the diffuser sheet moves to the light-transmitting hole, the push mechanism (120) drives the push plate (112) to push the support plate (111) upward. Then, the push mechanism (120) restricts one end of the diffuser sheet, forcing the diffuser sheet and the locking part to form a state where one end is raised and the other end is sunken, so that the arc surface of the diffuser sheet is close to the light-transmitting hole.

2. The real-time transmittance detection device for microcrystalline powder diffuser sheets according to claim 1, characterized in that: One end of the support plate (111) is slidably connected to an auxiliary upright plate (113), and the other end of the support plate (111) is rotatably connected to a rotating plate (130). The bottom section of the auxiliary upright plate (113) is T-shaped and is slidably connected to a slide rail (114). The slide rail (114) has a groove that matches the bottom of the auxiliary upright plate (113). The slide rail (114) is fixed to the base (100), and the locking part is set on the rotating plate (130).

3. The real-time transmittance detection device for microcrystalline powder diffuser sheets according to claim 2, characterized in that: The locking part includes an inner roller (140), an outer roller (141), and a lead screw (142) threadedly connected to a rotating plate (130). The distal end of the lead screw (142) is rotatably connected to a transition plate (143). The bottom of the transition plate (143) is rotatably connected to the inner roller (140). The inner rollers (140) are symmetrically arranged. The outer roller (141) is rotatably connected to the rotating plate (130), and the outer roller (141) is located at the dividing point of the diffuser plate, so as to cooperate with the inner rollers (140) on both sides to achieve three-point fixation of the diffuser plate.

4. The real-time transmittance detection device for microcrystalline powder diffuser sheets according to claim 3, characterized in that: A motor (131) is fixedly installed on a rotating plate (130) on the opposite side of the outer roller (141). The motor (131) drives the outer roller (141) to rotate via a belt, causing the diffuser to rotate counterclockwise and forming a sweeping area on the diffuser corresponding to the light-transmitting hole.

5. The real-time transmittance detection device for microcrystalline powder diffuser sheets according to claim 2, characterized in that: The pushing mechanism (120) includes a translation plate (121) slidably disposed on the surface of the base (100). The two ends of the translation plate (121) are located inside the slide rail (114). The two ends of the translation plate (121) are respectively fixedly connected to the extension end of the cylinder (124), and the cylinder (124) is fixed on the base (100).

6. The real-time transmittance detection device for microcrystalline powder diffuser sheets according to claim 5, characterized in that: The pushing mechanism (120) also includes a push plate (122) fixed in the middle of the translation plate (121). The push plate (122) is L-shaped and a limit block (123) is fixedly provided on the top. The limit block (123) is placed on one of the equal division points of the diffuser. During the translation phase, the push plate (122) is used to push the diffuser to move, while the limit block (123) is used to limit the diffuser from tilting up.

7. The real-time transmittance detection device for microcrystalline powder diffuser sheets according to claim 6, characterized in that: The vertical distance between the bottom of the push plate (122) and the support plate (102) is greater than the thick end of the support plate (102), and the vertical distance is used to receive the support plate (102).

8. The real-time transmittance detection device for microcrystalline powder diffuser sheet according to claim 1, characterized in that: The push plate (112) is inclined, with the raised end at the rotatable connection point with the support plate (111) and the sunken end at the other end.

9. The real-time transmittance detection device for microcrystalline powder diffuser sheet according to claim 2, characterized in that: A limiting groove (116) is provided on the auxiliary upright plate (113) corresponding to the rotatable connection between the push plate (112) and the support plate (111). The limiting groove (116) is used to guide the push plate (112) to move upward, so that the support plate (111) moves upward in the vertical direction.

10. The real-time transmittance detection device for microcrystalline powder diffuser sheets according to claim 5, characterized in that: A column (115) is fixedly installed on the push plate (112) at the lower end. Partitions (125) are symmetrically attached to the outside of the column (115) on both sides. The partitions (125) are fixed to the translation plate (121). The partitions (125) away from the auxiliary upright plate (113) are used to apply a pushing force to the column (115), and the partitions (125) close to the auxiliary upright plate (113) are used to limit the displacement of the column (115).

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