A light guide plate with side edge coating and a preparation process thereof

Abstract

This application relates to the field of light guide plate manufacturing technology, and in particular to a side-coated light guide plate and its manufacturing process. The light guide plate includes a substrate, with one side serving as a reflective side for reflecting a light source. In the manufacturing process, a coating apparatus is used to clamp and fix the substrate, and an adhesion layer, a metal reflective layer, and a protective layer are sequentially deposited on the reflective side. The coating apparatus is equipped with a clamping and locking mechanism or assembly to clamp the substrate, ensuring stable coating during the manufacturing process. This application can improve the brightness of the light guide plate, enhance product quality, and simultaneously increase the efficiency of the light guide plate manufacturing process.

Description

Technical Field

[0001] This application relates to the field of light guide plate manufacturing technology, and in particular to a side-coated light guide plate and its manufacturing process. Background Technology

[0002] The light guide plate is the core component of the backlight module. During the production process, the light guide plate needs to be treated to recover light from the sides. The light guide plate recovers light leakage. On the one hand, it reflects the light that escapes from the sides back into the light guide plate for use, reducing light energy loss and effectively improving the overall brightness of the screen and the light output efficiency. On the other hand, it can prevent light leakage from causing poor appearance problems such as bluish discoloration on the sides and diffuse reflection and brightness of the white frame, making the screen edge display more uniform and avoiding visual defects.

[0003] For light guide plates with a thickness of ≥1.0 mm, light leakage can be recovered by attaching reflective strips to the sides. However, due to process limitations, the width of the side strip cannot cover the thickness of the light guide plate, and gaps are likely to appear on the sides. For light guide plates with a thickness of less than 1.0 mm, side strips cannot be made due to process limitations, and light leakage cannot be effectively recovered. However, light guide plates made using vapor deposition vacuum evaporation technology can completely cover the width of the side of the light guide plate with the evaporated reflective film, and can recover light from one or three sides of the non-light-incident side. Compared with conventional laser light guide plates, it can achieve a brightness increase of more than 5%. At the same time, with the advantage of complete side sealing, it can not only improve the side blueing problem caused by light leakage when using blue LEDs with QDfilm architecture, but also solve the defect of abnormal brightness on the sides caused by diffuse reflection of light in white frame modules.

[0004] In current light guide plate coating operations, substrate clamping often relies on ordinary clamps or simple manual fixation, which suffers from problems such as low positioning accuracy, slow clamping efficiency, and unreliable fixation. During the coating process, the substrate is prone to displacement and loosening, leading to uneven deposition of the reflective film and edge missed coating, affecting the optical performance and yield of the light guide plate. At the same time, traditional clamping structures are cumbersome to assemble and disassemble, making them unsuitable for mass production of coating plates and restricting the overall efficiency of light guide plate manufacturing. Summary of the Invention

[0005] To improve the efficiency of light guide plate manufacturing, this application provides a light guide plate manufacturing process.

[0006] This application provides a process for fabricating a light guide plate with side coating, using the following technical solution: A process for fabricating a light guide plate with side coating includes the following steps: S1: Clean the surface of the light guide plate substrate to remove impurities and oil. S2: The cleaned light guide plate substrate is clamped onto the clamping and locking mechanism or clamping and locking assembly to fix the light guide plate substrate; S3: Coating the light guide plate substrate with a reflective film by using vapor deposition technology to coat the side of the light guide plate substrate. S4: Perform hot pressing treatment on the light guide plate; In S3, the reflective side is exposed through the coating device. The light guide plate substrate is located in a vacuum chamber. After the silicone oil is decomposed by plasma, an adhesion layer that enhances the adhesion of the reflective side is first deposited on the reflective side. Then, a metal reflective layer is vacuum sputtered onto the adhesion layer. Finally, an oxide layer is deposited as a protective layer covering the metal reflective layer.

[0007] The prepared light guide plate is a reflective light guide plate, which includes a light guide plate substrate and a reflective film. The light guide plate substrate includes a reflective side, and the reflective film covers the reflective side. The entire area of ​​the reflective side, including the edge area, is covered by the reflective film.

[0008] By adopting the above technical solutions, the process steps are simple and smooth, the clamping and fixing are reliable, the coating uniformity is high, the hot pressing treatment improves the optical performance, the reflectivity of the light guide plate is good, the overall brightness is improved, light leakage is avoided, and the production efficiency and finished product quality of the light guide plate are improved as a whole.

[0009] In one specific implementation, the thickness of the adhesion layer is 10-100 nm, the thickness of the reflective layer is 50 nm-150 nm, and the thickness of the protective layer is 10-100 nm.

[0010] In one specific implementation, the light guide plate substrate is divided into a planar light guide plate substrate and / or a structural surface light guide plate substrate.

[0011] By adopting the above technical solution, it is preferable to use a structural surface light guide plate substrate for coating, because there will be concave and convex textures at the intersection of the coating side and the light guide plate surface, which can enhance the stability of the reflective film after coating and make the reflective film less likely to fall off.

[0012] In one specific implementation scheme, a coating device is used in the process. The coating device is equipped with a clamping and locking mechanism or clamping and locking assembly for clamping a light guide plate substrate. The clamping and locking mechanism includes a base plate connected to the coating device, a side plate mounted on the base plate, a side pressing assembly for pressing the side wall of the light guide plate substrate, and a top pressing assembly for pressing the top surface of the light guide plate substrate. The top pressing assembly includes a second mounting plate mounted on the side plate, a guide rod mounted on the second mounting plate, a lifting plate slidably mounted on the guide rod, a first spring sleeved on the guide rod, a limit plate slidably mounted on the lifting plate, a second spring connected to the limit plate, the end of the second spring away from the limit plate connected to the lifting plate, a locking block mounted on the second limit plate, and a limit groove for the limit plate and the locking block to engage on the side plate. A push plate and a top block for pushing the limit plate are movably mounted on the second mounting plate. A pressure plate for pressing the light guide plate substrate is adjustablely connected to the second mounting plate.

[0013] By adopting the above technical solution, the side-pressing component clamps the light guide plate substrate from the side to achieve horizontal positioning; the top-pressing component, through the cooperation of the lifting plate, limiting plate, locking block and limiting groove, achieves quick clamping and positioning of the second mounting plate, and with the cooperation of the adjustable pressure plate, presses the substrate from the top to achieve vertical locking; the push plate and the top block are linked to control the engagement and disengagement of the limiting plate, which can be installed and disassembled without tools, is easy to operate, and is firmly fixed, effectively preventing the substrate from shifting during the coating process. At the same time, the top-pressing component is set as a detachable part, which allows the staff to remove the top-pressing component and place it on the side when picking up the light guide plate substrate, providing access space, facilitating the handling of the light guide plate, and preventing the top-pressing component from scratching the light guide plate, thus improving the coating accuracy and clamping efficiency.

[0014] In one specific implementation, the second mounting plate is formed with an ear plate, the ear plate has a third sliding groove, the ear plate is slidably mounted with a push rod through the third sliding groove, the push rod is mounted with a push plate, the push plate abuts against the limiting plate, the push rod is hinged with a push handle, and a locking piece is mounted on the bottom surface of the push handle.

[0015] By adopting the above technical solution, the push rod slides along the third slide groove, driving the push plate to push the limit plate to move, so as to realize the alignment and locking of the block with the limit groove; the push handle can be flipped to drive the locking plate to press down, so as to realize the locking of the mechanism. The structure is simple and the operation is labor-saving.

[0016] In one specific implementation, a fixing rod is mounted on the second mounting plate, a top block is slidably mounted on the fixing rod, and a third spring is sleeved on the fixing rod. One end of the third spring is connected to the top block, and the other end is connected to the second mounting plate. The top block is located below the limiting plate, and a first swing rod is hinged to the bottom surface of the top block. A second swing rod is hinged to the first swing rod, and the end of the second swing rod away from the first swing rod is hinged to the second mounting plate. The hinge position of the first swing rod and the second swing rod is biased towards one side of the push rod. The locking plate presses the first swing rod and the second swing rod to control the movement of the top block.

[0017] By adopting the above technical solution, the locking plate presses down to drive the first and second swing rods to move together, pushing the top block up and causing the limiting plate and the locking block to be firmly locked into the limiting groove; the third spring provides the restoring force, and the top block automatically falls back when unlocking, which facilitates the exit of the limiting plate and realizes quick unlocking.

[0018] In one specific implementation, the locking plate has a locking hole, the ear plate has an insertion hole, and a rod is inserted into the ear plate through the insertion hole. The rod passes through the insertion hole and the locking hole to fix the locking plate to the ear plate.

[0019] By adopting the above technical solution, the insertion rod passes through the insertion hole and the lock hole to achieve locking of the locking plate, preventing the push handle from accidentally loosening during operation and improving the reliability of clamping.

[0020] In one specific implementation, the second mounting plate has a U-shaped slot, and the second mounting plate is secured to the side plate through the slot.

[0021] By adopting the above technical solution, the U-shaped slot enables the second mounting plate and the side plate to be quickly aligned and snapped together, improving assembly efficiency and ensuring the installation accuracy of the top pressure component.

[0022] In one specific implementation, a pad supporting the light guide plate substrate is installed on the base plate, and a gap is left between the pad and the side plate.

[0023] By adopting the above technical solution, the pad supports the substrate, and the reserved gap makes it easy for the staff to pull the light guide plate out from under the light guide plate after the coating is completed.

[0024] In one specific implementation, the side pressure assembly includes a side pressure plate slidably connected to the side plate, a first mounting plate is mounted on the vertical side wall of the side plate, a first screw is threadedly connected to the first mounting plate, and the end of the first screw near the side pressure plate is rotatably connected to the side pressure plate.

[0025] By adopting the above technical solution, rotating the first screw drives the side pressure plate to move, thereby achieving side clamping and loosening. The clamping force is adjustable, adaptable to substrates of different thicknesses, and the positioning is stable.

[0026] In one specific implementation, the clamping and locking assembly includes a connecting rod for connecting to the coating device. A crossbar is mounted on the connecting rod, and a base frame is mounted on the crossbar. The base frame is an annular frame, and a vertical rod is mounted on the base frame. A top frame is connected to the end of the vertical rod away from the base frame. A reinforcing ring is mounted on the vertical rod, and a reinforcing plate is connected to the reinforcing ring. A locking plate is mounted on the vertical rod, and the locking plate is a U-shaped plate frame. A third screw is threaded onto the locking plate, and a pressure plate is rotatably mounted on the third screw.

[0027] By adopting the above technical solution, the ring frame structure is adapted to be clamped after the batch light guide plate substrate is coated. The locking plate, together with the third screw and the pressure plate, achieves rapid clamping. The structure is stable and rigid, which can meet the needs of large-scale synchronous coating in the coating device.

[0028] On the other hand, this application also provides a side-coated light guide plate, which is manufactured by the above-mentioned manufacturing process. The manufactured light guide plate has at least one side coated and can reflect light beams, thereby improving the brightness of the light guide plate.

[0029] In summary, this application includes at least one of the following beneficial technical effects: 1. The prepared light guide plate has a reflective film that can effectively reflect the projection of the light source, improve the brightness of the light guide plate, and is not prone to light leakage.

[0030] 2. The clamping and locking mechanism achieves dual fixation through side positioning and top pressing, ensuring precise positioning and reliable locking, preventing coating offset and improving the uniformity of reflective film deposition.

[0031] 3. The top pressure assembly adopts a locking block and limit groove combined with a swing rod linkage structure, which allows for quick assembly and disassembly without the need for special tools, significantly improving clamping efficiency. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the clamping and locking mechanism of Embodiment 1 of this application.

[0033] Figure 2 This is a schematic diagram of the first mounting plate of Embodiment 1 of this application.

[0034] Figure 3 This is a schematic diagram of the limiting groove in Embodiment 1 of this application.

[0035] Figure 4 This is a cross-sectional view of the second mounting plate of Embodiment 1 of this application.

[0036] Figure 5 This is a schematic diagram of the lifting plate of Embodiment 1 of this application.

[0037] Figure 6 This is a schematic diagram of the first pendulum rod in Embodiment 1 of this application.

[0038] Figure 7 This is a schematic diagram of the push plate in Embodiment 1 of this application.

[0039] Figure 8 This is a schematic diagram of the clamping and locking assembly of Embodiment 2 of this application.

[0040] Figure 9 This is a schematic diagram of the locking plate in Embodiment 2 of this application.

[0041] Figure 10 This is a schematic diagram of the structure of the light guide plate according to an embodiment of this application.

[0042] Figure 11 This is a comparative diagram of the manufacturing process of the light guide plate according to an embodiment of this application.

[0043] Reference numerals: 1. Clamping and locking mechanism; 11. Base plate; 111. Pad plate; 12. Side plate; 121. First slide groove; 122. Limiting groove; 13. Side pressure assembly; 131. Side pressure plate; 132. First mounting plate; 133. First screw; 14. Top pressure assembly; 141. Second mounting plate; 1411. Slot; 142. Guide rod; 143. Lifting plate; 1431. Second slide groove; 144. First spring; 145. Limiting plate; 1451. Protrusion; 146. Second spring; 147. Locking block; 15. Ear plate; 151. Third slide groove 152. Slot; 153. Push rod; 154. Push plate; 155. Push handle; 155. Locking plate; 1551. Locking hole; 156. Fixing rod; 157. Top block; 158. Third spring; 1591. First swing rod; 1592. Second swing rod; 161. Insertion hole; 162. Insertion rod; 163. Second screw; 164. Pressure plate; 2. Clamping and locking assembly; 21. Connecting rod; 22. Horizontal bar; 23. Base frame; 24. Vertical bar; 25. Top frame; 261. Reinforcing ring; 262. Reinforcing piece; 27. Locking plate; 271. Third screw; 272. Pressure piece. Detailed Implementation

[0044] The following is in conjunction with the appendix Figure 1-11 This application will be described in further detail. Example

[0045] This application discloses a process for fabricating a light guide plate with side-coated coating, referring to... Figure 1 , Figure 2 , Figure 3 and Figure 10The light guide plate includes a substrate with one side serving as a reflective side. A reflective film is coated on the reflective side, enabling it to reflect a light source. In this light guide plate fabrication process, a coating device is used. In this embodiment, the coating device is a PVD (Physical Vapor Deposition) device. PVD is a prior art material used for thin film deposition. PVD technology refers to the technique of vaporizing a material source surface into gaseous atoms or molecules, or partially ionizing them into ions, under vacuum conditions using physical methods, and then depositing a thin film with specific functions on the substrate surface through a low-pressure gas or plasma process. PVD is one of the main surface treatment technologies. The PVD device includes a clamping and locking mechanism 1 for holding the light guide plate substrate.

[0046] The clamping and locking mechanism 1 includes a base plate 11 connected to the coating device. A side plate 12 is fixedly installed on the base plate 11. The side plate 12 is an L-shaped plate. A pad 111 supporting the light guide plate substrate is fixedly installed on the base plate 11. A gap is left between the pad 111 and the side plate 12. A side pressing component 13 for pressing the side wall of the light guide plate substrate and a top pressing component 14 for pressing the top surface of the light guide plate substrate are installed on the side plate 12.

[0047] A first sliding groove 121 is provided on the side plate 12. The side pressure assembly 13 includes a side pressure plate 131, and a sliding column is fixedly connected to the side pressure plate 131. The sliding column extends into the first sliding groove 121 on the side plate 12, so that the side pressure plate 131 is slidably connected to the side plate 12. A notch is provided on the surface of the side pressure plate 131 that contacts the light guide plate substrate, and a notch is also provided on the surface of the side plate 12 opposite to the side pressure plate 131. A first mounting plate 132 is fixedly installed on the vertical side wall of the side plate 12. A first screw 133 is threadedly connected to the first mounting plate 132. The end of the first screw 133 near the side pressure plate 131 is rotatably connected to the side pressure plate 131, and a handle is fixedly installed on the end of the first screw 133 away from the side pressure plate 131.

[0048] Multiple light guide plate substrates are placed on the pad 111. The light guide plate substrates are moved so that their two sides are aligned and pressed against the side plate 12. It should be noted that a plastic gasket is placed between the pad 111 and the light guide plate substrates, and a gasket is also placed on the top surface of the light guide plate substrates. After the light guide plate substrates are aligned, the first screw 133 is rotated. The first screw 133 moves, causing the side pressure plate 131 to move, so that the side pressure plate 131 presses the light guide plate substrates from the side, pressing the light guide plate substrates against the side plate 12.

[0049] Reference Figure 4 , Figure 5 and Figure 6The top pressure assembly 14 includes a second mounting plate 141. The second mounting plate 141 has a U-shaped slot 1411. The second mounting plate 141 is secured to the side plate 12 through the slot 1411. A guide rod 142 is fixedly mounted on the second mounting plate 141. A lifting plate 143 is slidably mounted on the guide rod 142. A first spring 144 is sleeved on the guide rod 142. One end of the first spring 144 is fixedly connected to the lifting plate 143, and the other end is fixedly connected to the second mounting plate 141. The lifting plate 143 is provided with a second sliding groove 1431, which is a cross-shaped groove. The lifting plate 143 slides and a limiting plate 145 is installed through the second sliding groove 1431. A protrusion 1451 is formed on the limiting plate 145 and slides in the second sliding groove 1431. A second spring 146 is fixedly connected to the limiting plate 145. The end of the second spring 146 away from the limiting plate 145 is fixedly connected to the lifting plate 143. A locking block 147 is fixedly installed on the second limiting plate 145. The cross-section of the locking block 147 is trapezoidal. A limiting groove 122 is provided on the side plate 12 for the limiting plate 145 and the locking block 147 to be engaged.

[0050] Reference Figures 1 to 7 Two ear plates 15 are formed on the second mounting plate 141. A third sliding groove 151 is provided on each ear plate 15. A push rod 152 is slidably mounted on the ear plate 15 via the third sliding groove 151. A push plate 153 is fixedly mounted on the push rod 152, and the push plate 153 abuts against the limiting plate 145. A push handle 154 is hinged to the push rod 152. A locking piece 155 is fixedly mounted on the bottom surface of the push handle 154, and a locking hole 1551 is provided on the locking piece 155. A fixing rod 156 is fixedly mounted on the second mounting plate 141. A top block 157 is slidably mounted on the fixing rod 156. A third spring 158 is fixedly connected to the bottom surface of the top block 157. The other end of the third spring 158 is fixedly connected to the second mounting plate 141. The top block 157 is located below the limiting plate 145. A first rocker arm 1591 is hinged to the bottom surface of the top block 157, and a second rocker arm 1592 is hinged to the first rocker arm 1591. The end of the second rocker arm 1592 away from the first rocker arm 1591 is hinged to the second mounting plate 141. An acute angle is formed between the first rocker arm 1591 and the second rocker arm 1592, and the hinge position of the first rocker arm 1591 and the second rocker arm 1592 is biased towards the side of the push rod 152. An insertion hole 161 is provided on the ear plate 15, and an insertion rod 162 is inserted into the ear plate 15 through the insertion hole 161.

[0051] After the second mounting plate 141 is secured to the side plate 12, the operator holds the push handle 154 and pushes the push rod 152 to slide or directly pushes the push plate 153 to move. The push rod 152 drives the push plate 153 to push the limiting plate 145 to slide on the lifting plate 143, so that the end of the lifting plate 143 near the side plate 12, together with the locking block 147, extends into the limiting groove 122. Then, the push handle 154 is rotated downwards, and the locking piece 155 on the push handle 154 will press the first swing rod 1591 and the second swing rod 1592. The first swing rod 1591 and the second swing rod 1592 move to push the top block 157 to move upwards. The top block 157 contacts the limiting plate 145, causing the limiting plate 145 and the lifting plate 143 to move upwards, so that the locking block 147 is locked into the limiting groove 122. Next, insert the rod 162 through the insertion hole 161 and the lock hole 1551 to fix the locking piece 155 onto the ear plate 15, thereby completing the quick fixation of the second mounting plate 141.

[0052] A second screw 163 is threaded onto the second mounting plate 141. A pressure plate 164 is rotatably mounted on the end of the second screw 163 that contacts the light guide plate substrate. A rubber sheet is fixedly mounted on the bottom surface of the pressure plate 164. A handle is also fixedly mounted on the end of the second screw 163 that is away from the pressure plate 164.

[0053] After the second mounting plate 141 is fixedly installed, the second screw 163 is rotated. The second screw 163 moves on the second mounting plate 141, causing the pressure plate 164 to press onto the light guide plate substrate, thereby completing the positioning and fixing of the light guide plate substrate.

[0054] This application embodiment also provides a process for fabricating a light guide plate with side coating, including the following steps: S1: Clean the surface of the light guide plate substrate to remove impurities and oil. Plasma treatment can be used for cleaning. When selecting the light guide plate substrate, you can choose a substrate with a flat surface (smooth surface) or a substrate with a textured surface (uneven surface). The surface of the light guide plate substrate can be understood as the adjacent surface where the light guide plate substrate connects to the side. S2: The cleaned light guide plate substrate is stacked on the pad 111 of the clamping and locking mechanism 1, and the positioning and fixing of the light guide plate substrate is completed by the side pressure plate 131 and the pressure plate 164. S3: Coating the light guide plate substrate with a reflective film using vapor deposition technology; the thickness of the reflective film is 70-300nm. Side pressure plate 131 and pressure plate 164 press and fix multiple overlapping light guide plate substrates on both sides, one side is sealed, and the other side serves as a reflective side and is exposed. Multiple light guide plate substrates are fixed in a vacuum chamber by locking mechanism 1 for vapor deposition. During the vapor deposition process, the silicone oil pre-set in the vacuum chamber is first decomposed by plasma, and then a 50nm thick silicon oxide layer is deposited on the reflective side as an adhesion layer, which covers the surface area of ​​the reflective side. Then, an aluminum oxide layer with a thickness of 150nm is deposited as a metal reflective layer, and the reflective layer covers the adhesion layer. Finally, a 10nm thick silicon oxide layer is deposited as a protective layer covering the outer surface of the metal reflective layer.

[0055] S4: Perform hot pressing on the side of the light guide plate.

[0056] In another embodiment, in step S3, the deposited adhesion layer has a thickness of 10 nm, the metal reflective layer has a thickness of 100 nm, and the protective layer has a thickness of 50 nm.

[0057] In another embodiment, in step S3, the deposited adhesion layer has a thickness of 100 nm, the metal reflective layer has a thickness of 150 nm, and the protective layer has a thickness of 10 nm.

[0058] In another embodiment, in step S3, the deposited adhesion layer has a thickness of 50 nm, the metal reflective layer has a thickness of 50 nm, and the protective layer has a thickness of 100 nm.

[0059] The light guide plate manufactured by the above process is a side-coated reflective plate, with a reflective film on one side. This reflective film can reflect the light beam and improve the brightness of the light guide plate. Example

[0060] Reference Figure 8 and Figure 9The difference between this embodiment and Embodiment 1 lies in the clamping method of the light guide plate substrate. This embodiment provides another clamping and locking assembly 2 for clamping and fixing the light guide plate substrate installed in the coating device. The clamping and locking assembly 2 includes a connecting rod 21 for connecting to the coating device. A crossbar 22 is fixedly installed on the connecting rod 21. A base frame 23 is fixedly installed on the crossbar 22. The base frame 23 is a ring-shaped frame. A vertical rod 24 is fixedly installed on the base frame 23. The vertical rods 24 are distributed at equal angles around the circumference. A top frame 25 is fixedly connected to the end of the vertical rod 24 away from the base frame 23. A reinforcing ring 261 is fixedly installed on the vertical rod 24. A reinforcing piece 262 is fixedly connected to the reinforcing ring 261. A locking plate 27 is fixedly installed on the vertical rod 24. The locking plate 27 is a U-shaped plate frame. A third screw 271 is threadedly connected to the locking plate 27. A pressure plate 272 is rotatably installed on the third screw 271. A handle is also fixedly installed on the end of the third screw 271 away from the pressure plate 272.

[0061] The workers overlap multiple light guide plate substrates together, then wrap the light guide plate substrates with tape, exposing the sides of the light guide plate that need to be coated. Next, the workers use the third screw 271 to rotate the wrapped light guide plate substrates, and use the pressure plate 272 and locking plate 27 to clamp the light guide plate substrates onto the locking plate 27.

[0062] Reference Figure 10 and Figure 11 , Figure 10 This is a schematic diagram of the optical path after the light guide plate substrate has been coated. Figure 11 This is a comparative chart of experimental data presented when different substrates are used in the production of the light guide plate in this application. Figure 11 The "middle frame" refers to the plastic frame used to fix the light guide plate, reflector, and LED strip in the backlight module. It directly contacts the side of the light guide plate, and its material and color affect the light performance. In terms of manufacturing process, laser refers to the laser dot light guide plate process, which is one of the most mainstream microstructure processing methods for light guide plates in backlight modules. High luminance refers to the high luminance light guide plate process, and both the laser dot light guide plate process and high luminance light guide plate process are existing technologies for manufacturing light guide plates. In terms of materials, flat panel refers to the planar light guide plate substrate, and structural panel refers to the structural surface light guide plate substrate. 49P luminance refers to the brightness value measured at the center of the screen on a 49-inch display panel. Luminance, also called brightness, is the luminous intensity per unit area of ​​the screen.

[0063] The implementation principle of this application embodiment is as follows: The clamping and locking mechanism 1 of this application embodiment 1 achieves stable clamping of the light guide plate substrate by combining side positioning clamping and top surface quick locking and pressing. The substrate is supported by the pad 111 on the base plate 11, and the side plate 12 is used as the positioning reference. The side pressure plate 131 is driven by the first screw 133 to achieve reliable side clamping. The top pressing component 14 is quickly hung on the side plate 12 through the slot 1411 of the second mounting plate 141. The push plate 153 pushes the limiting plate 145 and the locking block 147 into the limiting groove 122, and the first swing rod 1591 and the second swing rod 1592 are linked to achieve self-locking. The second screw 163 and the pressure plate 164 complete the top surface pressing. The whole assembly and disassembly do not require... Specialized tools ensure precise positioning and secure locking, effectively preventing substrate displacement, loosening, or surface damage during coating. They also reduce occlusion in the coating area, ensuring uniform deposition of the reflective film. In Example 2, the clamping and locking assembly 2 employs a ring-shaped truss frame and a locking clamping structure. Connected to the coating device via a connecting rod 21, it utilizes a base frame 23, vertical rod 24, and top frame 25 to form stable support. A locking plate 27, a third screw 271, and a pressure plate 272 enable rapid clamping of the laminated substrate after coating. This meets the requirement for simultaneous coating of large batches of light guide plate substrates. The two clamping structures are adapted to different production scenarios, and combined with cleaning, coating, and hot stamping processes, significantly improve the efficiency of light guide plate production, coating quality, and optical performance.

[0064] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A process for manufacturing a light guide plate with side-coated coating, characterized in that, The light guide plate substrate includes a reflective side surface with a reflective film covering the reflective side surface of the light guide plate substrate. The manufacturing process of the light guide plate includes the following steps: S1: Clean the surface of the light guide plate substrate to remove impurities and oil. S2: The cleaned light guide plate substrate is clamped by the coating device to fix the light guide plate substrate; S3: A film is deposited on the light guide plate substrate by PVD physical vapor deposition. An adhesion layer, a metal reflective layer and a protective layer are sequentially deposited on the reflective side of the light guide plate substrate. The adhesion layer improves the adhesion between the reflective side and the reflective film. The reflective film covers the entire area of ​​the reflective side. S4: Perform hot pressing treatment on the light guide plate; In S3, the reflective side is exposed through the coating device. The light guide plate substrate is located in a vacuum chamber. After the silicone oil is decomposed by plasma, an adhesion layer that enhances the adhesion of the reflective side is first deposited on the reflective side. Then, a metal reflective layer is vacuum sputtered onto the adhesion layer. Finally, an oxide layer is deposited as a protective layer covering the metal reflective layer.

2. The manufacturing process of a light guide plate with side coating according to claim 1, characterized in that: The thickness of the adhesion layer is 10-100nm, the thickness of the reflective layer is 50-150nm, and the thickness of the protective layer is 10-100nm; the light guide plate substrate is a planar light guide plate substrate and / or a structural light guide plate substrate.

3. The light guide plate manufacturing process according to claim 1, characterized in that: The coating device is equipped with a clamping and locking mechanism (1) or a clamping and locking assembly (2) for clamping the light guide plate substrate. The clamping and locking mechanism (1) includes a base plate (11) connected to the coating device. A side plate (12) is mounted on the base plate (11). A side pressing assembly (13) for pressing the side wall of the light guide plate substrate and a top pressing assembly (14) for pressing the top surface of the light guide plate substrate are mounted on the side plate (12). The top pressing assembly (14) includes a second mounting plate (141) mounted on the side plate (12). A guide rod (142) is mounted on the second mounting plate (141). A lifting plate (143) is slidably mounted on the guide rod (142). A first spring (143) is sleeved on the guide rod (142). 4) A limiting plate (145) is slidably installed on the lifting plate (143). A second spring (146) is connected to the limiting plate (145). The end of the second spring (146) away from the limiting plate (145) is connected to the lifting plate (143). A locking block (147) is installed on the second limiting plate (145). A limiting groove (122) is opened on the side plate (12) for the limiting plate (145) and the locking block (147) to be engaged. A push plate (153) and a top block (157) for pushing the limiting plate (145) to move are movably installed on the second mounting plate (141). A pressure plate (164) for pressing the light guide plate substrate is adjustablely connected to the second mounting plate (141).

4. The manufacturing process of a light guide plate with side coating according to claim 3, characterized in that: The second mounting plate (141) has an ear plate (15) formed on it. The ear plate (15) has a third sliding groove (151). The ear plate (15) has a push rod (152) slidably mounted on it through the third sliding groove (151). The push rod (152) has a push plate (153) mounted on it. The push plate (153) abuts against the limiting plate (145). The push rod (152) has a push handle (154) hinged on it. The bottom surface of the push handle (154) has a locking piece (155).

5. The manufacturing process of a light guide plate with side coating according to claim 4, characterized in that: A fixing rod (156) is mounted on the second mounting plate (141). A top block (157) is slidably mounted on the fixing rod (156). A third spring (158) is sleeved on the fixing rod (156). One end of the third spring (158) is connected to the top block (157), and the other end is connected to the second mounting plate (141). The top block (157) is located below the limiting plate (145). A first swing rod (1591) is hinged to the bottom surface of the top block (157). A second swing arm (1592) is hinged to the first swing arm (1591). The end of the second swing arm (1592) away from the first swing arm (1591) is hinged to the second mounting plate (141). The hinge position of the first swing arm (1591) and the second swing arm (1592) is biased towards one side of the push rod (152). The locking piece (155) presses the first swing arm (1591) and the second swing arm (1592) to control the movement of the top block (157).

6. The manufacturing process of a light guide plate with side coating according to claim 5, characterized in that: The locking plate (155) has a locking hole (1551), and the ear plate (15) has an insertion hole (161). The ear plate (15) has a insertion rod (162) inserted through the insertion hole (161). The insertion rod (162) passes through the insertion hole (161) and the locking hole (1551) to fix the locking plate (155) on the ear plate (15).

7. The manufacturing process of a light guide plate with side coating according to claim 5, characterized in that: A pad (111) supporting the light guide plate substrate is installed on the base plate (11), and a gap is left between the pad (111) and the side plate (12).

8. The manufacturing process of a light guide plate with side coating according to claim 5, characterized in that: The side pressure assembly (13) includes a side pressure plate (131), which is slidably connected to the side plate (12). A first mounting plate (132) is installed on the vertical side wall of the side plate (12). A first screw (133) is threadedly connected to the first mounting plate (132). The end of the first screw (133) near the side pressure plate (131) is rotatably connected to the side pressure plate (131).

9. The manufacturing process of a light guide plate with side coating according to claim 5, characterized in that: The clamping and locking assembly (2) includes a connecting rod (21) for connecting to the coating device. A crossbar (22) is mounted on the connecting rod (21). A base frame (23) is mounted on the crossbar (22). The base frame (23) is an annular frame. A vertical rod (24) is mounted on the base frame (23). A top frame (25) is connected to one end of the vertical rod (24) away from the base frame (23). A reinforcing ring (261) is mounted on the vertical rod (24). A reinforcing piece (262) is connected to the reinforcing ring (261). A locking plate (27) is mounted on the vertical rod (24). The locking plate (27) is a U-shaped plate frame. A third screw (271) is threaded onto the locking plate (27). A pressure piece (272) is rotatably mounted on the third screw (271).

10. A light guide plate with side-coated coating, characterized in that: It is prepared by the light guide plate preparation process as described in any one of claims 1-9.

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