Composite light guide plate and manufacturing equipment and manufacturing method thereof
By adopting a composite structure of PMMA board and PC layer on the light guide plate, the problem of light deviation caused by the deformation of the dot groove of the existing light guide plate is solved, and the stable refraction and light output of the light is achieved, which significantly enhances the light guide effect of the light guide plate.
Patent Information
- Application Number
- CN202411876493.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-19
- Publication Date
- 2025-02-18
AI Technical Summary
The dot grooves of existing light guide plates are prone to deformation during use, resulting in deviation when light is refracted and affecting the light guide effect.
A composite light guide plate structure is adopted, including a PMMA plate and a PC layer composited on the side of the PMMA plate, and several dot grooves are provided on the PC layer. Through the cooperation of the PMMA board and the PC layer, the stable refraction and light output of light are ensured, the light output area of the light guide plate is increased, and the light guiding effect is enhanced.
It effectively improves the light output concentration of light and the forming intensity of dot grooves, prevents the deformation of the dot grooves, and significantly enhances the light guide effect of the light guide plate.
Smart Images
Figure CN119471893A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of light guide plates, and in particular to a composite light guide plate and a manufacturing device and method thereof. Background Art
[0002] The light guide plate is a high-tech material with a very high refractive index and does not absorb light. When light hits the various dot grooves on the light guide plate, the reflected light will diffuse to various angles, and then destroy the reflection conditions and be emitted from the front of the light guide plate. Through various dot grooves of different densities and sizes, the light guide plate can emit light evenly. However, due to the limitations of its own materials, the dot grooves on the existing light guide plate are prone to deformation during use, causing the light to deviate when refracted in the light guide plate, which seriously affects the light output angle, and further affects the light guiding effect of the light guide plate. Summary of the invention
[0003] The first objective of the present application is to overcome the deficiencies of the prior art and provide a composite light guide plate.
[0004] The composite light guide plate provided in this application adopts the following technical solution: A composite light guide plate comprises a PMMA plate and a PC layer composited to the side of the PMMA plate, wherein the PC layer is provided with a plurality of dot grooves.
[0005] By adopting the above technical solution, the composite light guide plate can ensure stable refraction and light emission of light under the cooperation of the PMMA plate and the PC layer, effectively increasing the light emission area of the light guide plate and enhancing the light guiding effect of the light guide plate.
[0006] Preferably, the plurality of dot grooves are regularly or irregularly distributed, and the distance between any two adjacent dot grooves is 250 μm to 300 μm.
[0007] By adopting the above technical solution, the light output concentration of the light is effectively improved.
[0008] Preferably, the longitudinal cross-section of each of the mesh dot grooves is V-shaped or R-shaped, and the angle between adjacent groove walls of each of the mesh dot grooves is 30° to 60°.
[0009] By adopting the above technical solution, the forming strength of the mesh dot groove is effectively improved, and deformation of the mesh dot groove is prevented.
[0010] The second object of the present application is to provide a method for manufacturing a composite light guide plate.
[0011] The present application provides a method for manufacturing a composite light guide plate using the following technical solution: A method for manufacturing a composite light guide plate comprises the following steps: Step 1, injection molding the PMMA raw material, followed by a flattening process to obtain a plate; Step 2, coating a PC layer on one side of the primary plate, and then performing a secondary flattening process to obtain a secondary plate; Step 3, processing a plurality of dot grooves on the PC layer, and then obtaining a formed composite light guide plate.
[0012] By adopting the above technical solution, the prepared composite light guide plate can ensure stable refraction and light emission of light under the cooperation of the PMMA plate and the PC layer, effectively increase the light emission area of the light guide plate, and enhance the light guiding effect of the light guide plate.
[0013] Preferably, in the step 1, after the PMMA raw material is injection molded, the molded PMMA raw material is subjected to traction cooling, and then the first flattening process is performed.
[0014] By adopting the above technical solution, the surface of the formed PMMA raw material can be cooled and solidified during the traction process, which not only avoids the deformation of the PMMA raw material, but also facilitates the subsequent coating of the PC layer thereon.
[0015] Preferably, in step 2, the thickness of the PC layer is 0-100 um.
[0016] Preferably, in the step 2, after the secondary flattening process, the step further includes coating a protective film on both sides of the secondary plate.
[0017] By adopting the above technical solution, the protective film can protect the surface of the formed secondary plate material and prevent other adverse problems from occurring on the surface of the formed secondary plate material.
[0018] The third object of the present application is to provide a manufacturing device for a composite light guide plate.
[0019] The present application provides a composite light guide plate manufacturing device that adopts the following technical solution: A manufacturing device for a composite light guide plate, comprising a molding assembly, a traction assembly and a coating assembly arranged in sequence, a flattening assembly is respectively arranged between the traction assembly and the coating assembly and on a side of the coating assembly away from the traction assembly, the flattening assembly comprises two flattening rollers which are parallel to each other and arranged up and down, and at least one of the flattening rollers can be raised and lowered; The flattening assembly also includes two driving units for driving the two ends of the at least one flattening roller to rise and fall synchronously, each of the driving units includes a driving frame and a lift seat which is liftable and arranged at the lower part of the driving frame, the two lift seats constituting the two driving units are rotatably connected to the two ends of the flattening roller respectively, two connecting rod modules are also arranged between the upper part of the driving frame and the lift seat, the two connecting rod modules are symmetrically arranged about the lift seat, each of the connecting rod modules includes a first connecting rod and a second connecting rod which are arranged up and down and hinged to each other, one end of the first connecting rod and the second connecting rod which are away from each other are hinged to the upper part of the driving frame and the lift seat respectively, one of the two first connecting rods is an active rod, and a locking module for locking the active rod is also provided on the driving frame.
[0020] By adopting the above technical solution, workers can easily and accurately adjust the distance between the two flattening rollers through the driving unit to adjust the molding thickness of the light guide plate; at the same time, the two first connecting rods and the two second connecting rods can cooperate with each other and drive the lifting seat to rise and fall stably and accurately, preventing the lifting seat from deflecting during the lifting process and affecting the flattening quality of the composite light guide plate by the two flattening rollers.
[0021] Preferably, a mounting seat is provided on the upper part of the driving frame, and the mounting seat includes two seat plates parallel to each other, the active rod is accommodated between the two seat plates, there are multiple locking modules and they are arranged at intervals around the rotation direction of the active rod, and a locking hole is opened on the active rod, and each of the locking modules includes a retractable locking column arranged on at least one of the two seat plates, and the locking column can be inserted into the locking hole.
[0022] By adopting the above technical solution, the active rod can be locked in the corresponding rotation position under the cooperation of the locking column and the locking hole, thereby preventing the lifting seat from moving accidentally during the operation of the flattening assembly and affecting the flattening quality of the composite light guide plate by the two flattening rollers.
[0023] Preferably, the two first connecting rods respectively have a first hinged end hinged to the upper part of the driving frame, and the sides of the two first hinged ends close to each other are respectively provided with a first serration portion, and the two first serration portions are relatively meshed; the two second connecting rods respectively have a second hinged end hinged to the lifting seat, and the sides of the two second hinged ends close to each other are respectively provided with a second serration portion, and the two second serration portions are relatively meshed.
[0024] By adopting the above technical solution, the two first connecting rods and the two second connecting rods can be linked through the cooperation of the two first serrated portions and the two second serrated portions respectively, so as to ensure that the two first connecting rods and the two second connecting rods can move synchronously and stably, thereby effectively improving the lifting stability and lifting accuracy of the lifting seat, and preventing the lifting seat from deflecting during the lifting process and affecting the flattening quality of the composite light guide plate by the two flattening rollers.
[0025] In summary, the present invention includes at least one of the following beneficial technical effects: The composite light guide plate can ensure the stable refraction and light output of light under the cooperation of the PMMA plate and the PC layer, effectively increasing the light output area of the light guide plate and enhancing the light guiding effect of the light guide plate. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] Figure 1 is a schematic structural diagram of the composite light guide plate in Examples 1-3 of the present application; Figure 2 is a longitudinal cross-sectional schematic diagram of the composite light guide plate in Examples 1-3 of the present application; Figure 3 This is a light guiding principle diagram of the composite light guide plate in Examples 1-3 of the present application when it is illuminated by an LED lamp; Figure 4 is a schematic diagram of the structure of the manufacturing equipment in Example 1 of the present application; Figure 5 is a schematic structural diagram of the flattening assembly in Example 1 of the present application; Figure 6 It is a partial cross-sectional view of the flattening assembly in Example 1 of the present application.
[0027] Markings in the accompanying drawings: 1. PMMA board; 2. PC layer; 3. Dot groove; 4. Forming component; 5. Pulling component; 51. Pulling roller; 52. First motor; 6. Coating component; 7. Flattening component; 71. Flattening roller; 72. Driving unit; 721. Driving frame; 722. Lifting seat; 723. First connecting rod; 724. Second connecting rod; 725. Mounting seat; 726. Locking hole; 727. First serration; 728. Second serration; 73. Locking module; 731. Locking column; 732. Slot; 733. Spring; 74. Second motor; 75. Handle; 76. Synchronous rod; 8. Frame; 9. Cooling component; 10. Transition component; 101. Transition roller; 11. Laminating component; 12. LED light. DETAILED DESCRIPTION
[0028] The following is combined with Figure 1-6 The present invention is described in further detail.
[0029] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.
[0030] Example 1: See Figure 4-6 As shown, a manufacturing device for a composite light guide plate is shown, including a frame 8, on which a molding assembly 4, a traction assembly 5 and a coating assembly 6 are sequentially arranged. Among them, the molding assembly 4 is used to output the initially formed PMMA plate 1, which is an injection molding machine in the prior art, and the specific structure and principle are not repeated here; the traction assembly 5 is arranged at the outlet of the injection molding machine, and includes three traction rollers 51 arranged up and down and parallel to each other, and a first motor 52 for driving a middle traction roller 51 to rotate, and the PMMA plate 1 can be passed around the three traction rollers 51 in sequence; the coating assembly 6 is a coating machine in the prior art, which is the prior art, and the specific structure and principle are not repeated here, and it is used to coat the PC raw material on the PMMA plate 1.
[0031] In this embodiment, a flattening assembly 7 is respectively arranged between the traction assembly 5 and the coating assembly 6 and on the side of the coating assembly 6 away from the traction assembly 5. The two groups of flattening assemblies 7 are respectively used to flatten the initially formed PMMA plate 1 and the PMMA plate 1 compounded with the PC layer 2, and include two flattening rollers 71 which are parallel to each other and arranged up and down. The two flattening rollers 71 extend in the horizontal direction respectively and their axes are parallel to the axis of the traction roller 51. The flattening roller 71 located above is driven to rotate by the second motor 74 and the flattening roller 71 can be raised and lowered.
[0032] Combination Figure 5-6As shown, the flattening assembly 7 also includes two driving units 72 for driving the two ends of the flattening roller 71 located above to rise and fall synchronously. The two driving units 72 are respectively located at the two ends of the flattening roller 71. Each driving unit 72 includes a driving frame 721 and a lifting seat 722 which can be lifted and lowered and is arranged at the lower part of the driving frame 721. The two lifting seats 722 constituting the two driving units 72 are respectively rotatably connected to the two ends of the flattening roller 71. Two connecting rod modules are further arranged between the upper part of the driving frame 721 and the lifting seat 722. The two connecting rod modules are arranged side by side in the horizontal direction and symmetrically about the lifting seat 722. The arrangement direction of the two connecting rod modules is perpendicular to the axial direction of the flattening roller 71. Each connecting rod module includes The first connecting rod 723 and the second connecting rod 724 are arranged up and down and hinged to each other, the upper end of the first connecting rod 723 is hinged to the upper part of the driving frame 721, and the lower end of the second connecting rod 724 is hinged to the lifting seat 722. The rotation axis between the first connecting rod 723 and the driving frame 721, the rotation axis between the first connecting rod 723 and the second connecting rod 724, and the rotation axis between the second connecting rod 724 and the lifting seat 722 are respectively parallel to the rotation axis of the flattening roller 71. One of the two first connecting rods 723 is an active rod, and a handle 75 is provided on the active rod. A synchronization rod 76 is connected between the two handles 75 constituting the two driving units 72. A locking module 73 for locking the active rod is also provided on the driving frame 721.
[0033] When workers need to adjust the distance between the two flattening rollers 71, they only need to operate the synchronization rod 76 to rotate the active rod and lock it in the corresponding rotation position through the locking module 73. In this way, the distance between the two flattening rollers 71 can be conveniently and accurately adjusted to adjust the molding thickness of the light guide plate; and the two symmetrically arranged connecting rod modules can enable the lifting seat 722 to be stably and accurately lifted and lowered along the vertical direction. The setting of the first connecting rod 723 and the second connecting rod 724 can enable the two connecting rod modules to avoid each other during movement to prevent interference. The two lifting seats 722 can drive the two ends of the flattening roller 71 to rise and fall stably and accurately, preventing the two ends of the flattening roller 71 from deflecting during the lifting process and affecting the flattening quality of the composite light guide plate.
[0034] In this embodiment, a mounting seat 725 is provided on the upper part of the driving frame 721, and the mounting seat 725 includes two seat plates parallel to each other. The arrangement direction of the two seat plates is the same as the axial direction of the flattening roller 71, and the active rod is accommodated between the two seat plates. There are three locking modules 73 and they are arranged at intervals around the rotation direction of the active rod. The active rod is provided with a locking hole 726. Each locking module 73 includes a retractable locking column 731 provided on one of the seat plates, and the locking column 731 can be inserted into the locking hole 726.
[0035] Three slots 732 are provided on one of the base plates, and the locking column 731 is respectively inserted in each slot 732. A spring 733 is sleeved on the locking column 731, and the two ends of the spring 733 are respectively connected to the outer side of the base plate and the end of the locking column 731 away from the active rod. The active rod can be locked in a corresponding rotation position under the cooperation of the locking column 731 and the locking hole 726, so as to prevent the lifting seat 722 from moving by mistake during the operation of the flattening assembly 7 and affecting the flattening quality of the two flattening rollers 71 on the composite light guide plate.
[0036] Among them, the locking column 731 has a locking end inserted into the locking hole 726, and the surrounding side of the locking end has a chamfer. The aperture of the locking hole 726 gradually increases in the direction approaching the locking column 731. The locking hole 726 with a gradually increasing aperture can cooperate with the locking end with a chamfer, which facilitates the insertion and disengagement of the locking column 731 in the locking hole 726, so that the worker can drive the active rod to disengage from the locking of the locking column 731 by pulling the handle 75.
[0037] In this embodiment, combined with Figure 6 As shown, the two first connecting rods 723 respectively have a first hinged end hinged to the mounting seat 725, and the two first hinged ends are respectively provided with a first serration 727 on one side close to each other, and the two first serration 727 are relatively meshed; the two second connecting rods 724 respectively have a second hinged end hinged to the lifting seat 722, and the two second hinged ends are respectively provided with a second serration 728 on one side close to each other, and the two second serration 728 are relatively meshed.
[0038] When the worker drives the two connecting rod modules to move through the active rod, the two first connecting rods 723 and the two second connecting rods 724 can respectively achieve linkage through the cooperation of the two first serrated portions 727 and the two second serrated portions 728, so as to ensure that the two first connecting rods 723 and the two second connecting rods 724 can move synchronously and stably, thereby effectively improving the lifting stability and lifting accuracy of the lifting seat 722, and preventing the lifting seat 722 from deflecting during the lifting process and affecting the flattening quality of the composite light guide plate by the two flattening rollers 71.
[0039] In this embodiment, again combined Figure 4As shown, a cooling assembly 9 and a transition assembly 10 are also arranged between the traction assembly 5 and the coating assembly 6. The cooling assembly 9 includes a cooling roller, the axial direction of which is parallel to the axial direction of the traction roller 51, the cooling roller is hollow and both ends of which are connected to a cold water source, the PMMA plate 1 can pass through the cooling roller after being pulled by the traction assembly 5, and the PMMA plate 1 is cooled and solidified by passing cooling water into and out of the cooling roller; the transition assembly 10 includes three transition rollers 101 arranged in a horizontal direction, the axial directions of the three transition rollers 101 are parallel to the axial direction of the traction roller 51, and the three transition rollers 101 are used to support the bottom of the PMMA plate 1 so that the PMMA plate 1 can smoothly reach the coating assembly 6.
[0040] In this embodiment, the second flattening assembly 7 is also provided with a coating assembly 11 for coating the protective film on both sides of the PMMA plate 1. The coating assembly 11 is a coating machine in the prior art, which can coat the protective film on the upper and lower sides of the PMMA plate 1. The specific structure and principle are not described here. The protective film is a film made of PET material. Of course, the protective film can also be made of other materials according to specific needs. After the protective film is coated on both sides of the PMMA plate 1 compounded with the PC layer 2, a plurality of dot grooves 3 are processed on the PC layer 2 through a recasting hot pressing process, and a composite light guide plate can be obtained.
[0041] Embodiment 2: This embodiment discloses a method for manufacturing a composite light guide plate based on the manufacturing equipment of Embodiment 1, which comprises the following steps: Step 1, the distance between the two flattening rollers 71 constituting the flattening assembly 7 is stably and accurately adjusted by the driving unit 72, and then the PMMA raw material is injection molded by the injection molding machine, and the semi-solid PMMA plate 1 formed initially is sequentially conveyed through the three traction rollers 51, the cooling roller and the transition roller 101 to achieve traction cooling of the PMMA plate 1, and then the PMMA plate 1 is conveyed into the first group of flattening assemblies 7 for a flattening process to obtain a primary plate; Step 2, the primary sheet is fed into the coating assembly 6, the coating assembly 6 coats the PC raw material on the upper side of the primary sheet, the PC raw material forms a PC layer 2 with a thickness of 0-100 um on the side of the primary sheet, and then the primary sheet compounded with the PC layer 2 is fed into the second group of flattening assemblies 7 for a secondary flattening process to obtain a secondary sheet; The secondary plate is fed into the coating assembly 11, and the coating assembly 11 coats both sides of the secondary plate with a protective film; Step 3, a plurality of mesh grooves 3 are processed on the PC layer 2 by the recasting and hot pressing process in the prior art, and then a formed composite light guide plate is obtained.
[0042] Example 3: See Figure 1-3As shown, this embodiment discloses a composite light guide plate manufactured by the manufacturing equipment of Example 1 and the manufacturing method of Example 2, wherein the composite light guide plate includes a PMMA plate 1, a PC layer 2 composited to the side of the PMMA plate 1, and a plurality of dot grooves 3 are arranged on the PC layer 2.
[0043] like Figure 3 As shown, when the LED lamp 12 emits light to the light guide plate, since the structure and performance of PC material are more stable than those of PMMA material, the dot groove 3 opened on the PC layer 2 is not easy to deform, so that the light output angle will not change significantly. The composite light guide plate can ensure the stable refraction and light output of the light with the cooperation of the PMMA plate 1 and the PC layer 2, effectively increase the light output area of the light guide plate, and enhance the light guiding effect of the light guide plate.
[0044] In this embodiment, a plurality of dot grooves 3 are irregularly distributed, and the distance between any two adjacent dot grooves 3 is 250 μm-300 μm.
[0045] The longitudinal cross-section of each mesh dot groove 3 is V-shaped or R-shaped, the angle between adjacent groove walls of each mesh dot groove 3 is 45°, the depth of each mesh dot groove 3 is proportional to the distance between adjacent mesh dot grooves 3, and the specific ratio can be designed according to needs.
[0046] The embodiments of this specific implementation method are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.
Claims
1. A composite light guide plate, characterized in that: It comprises a PMMA plate (1), a PC layer (2) compounded on the side of the PMMA plate (1), and a plurality of dot grooves (3) are arranged on the PC layer (2).
2. The composite light guide plate according to claim 1, characterized in that: The plurality of dot grooves (3) are regularly or irregularly distributed, and the distance between any two adjacent dot grooves (3) is 250 μm to 300 μm.
3. The composite light guide plate according to claim 1, characterized in that: The longitudinal cross-section of each of the mesh dot grooves (3) is V-shaped or R-shaped, and the angle between adjacent groove walls of each of the mesh dot grooves (3) is 30° to 60°.
4. A method for manufacturing a composite light guide plate, characterized in that: The steps include: Step 1, injection molding the PMMA raw material, followed by a flattening process to obtain a plate; Step 2, coating a PC layer (2) on one side of the primary plate, and then performing a secondary flattening process to obtain a secondary plate; Step 3, processing a plurality of dot grooves (3) on the PC layer (2), and then obtaining a formed composite light guide plate.
5. The method for manufacturing a composite light guide plate according to claim 4, characterized in that: In the step 1, after the PMMA raw material is injection molded, the molded PMMA raw material is traction-cooled, and then the first flattening process is performed.
6. The method for manufacturing a composite light guide plate according to claim 4, characterized in that: In step 2, the thickness of the PC layer (2) is 0-100 um.
7. The method for manufacturing a composite light guide plate according to claim 4, characterized in that: In the step 2, after the secondary flattening process, a protective film is also applied to both sides of the secondary plate.
8. A manufacturing device for a composite light guide plate, characterized in that: The invention comprises a molding component (4), a traction component (5) and a coating component (6) which are arranged in sequence, and a flattening component (7) is respectively arranged between the traction component (5) and the coating component (6) and on the side of the coating component (6) away from the traction component (5), and the flattening component (7) comprises two flattening rollers (71) which are parallel to each other and arranged up and down, and at least one of the flattening rollers (71) can be raised and lowered; The flattening assembly (7) further comprises two driving units (72) for driving the two ends of the at least one flattening roller (71) to rise and fall synchronously, each of the driving units (72) comprising a driving frame (721) and a lifting seat (722) which is liftable and arranged at the bottom of the driving frame (721), the two lifting seats (722) constituting the two driving units (72) being rotatably connected to the two ends of the flattening roller (71), and two connecting rod molds are arranged between the upper part of the driving frame (721) and the lifting seat (722). The two connecting rod modules are symmetrically arranged about the lifting seat (722), and each of the connecting rod modules comprises a first connecting rod (723) and a second connecting rod (724) which are arranged up and down and hinged to each other. The ends of the first connecting rod (723) and the second connecting rod (724) which are away from each other are hinged to the upper part of the driving frame (721) and the lifting seat (722), respectively. One of the two first connecting rods (723) is an active rod, and a locking module (73) for locking the active rod is also provided on the driving frame (721).
9. The manufacturing equipment of the composite light guide plate according to claim 8, characterized in that: A mounting seat (725) is arranged on the upper part of the driving frame (721), and the mounting seat (725) includes two seat plates parallel to each other. The active rod is accommodated between the two seat plates. There are multiple locking modules (73) and they are arranged at intervals around the rotation direction of the active rod. A locking hole (726) is opened on the active rod. Each of the locking modules (73) includes a retractable locking column (731) arranged on at least one of the two seat plates, and the locking column (731) can be inserted into the locking hole (726).
10. The manufacturing equipment of the composite light guide plate according to claim 8, characterized in that: The two first connecting rods (723) respectively have a first hinged end hinged to the upper part of the driving frame (721), and the two first hinged ends are respectively provided with a first serration portion (727) on the side close to each other, and the two first serration portions (727) are meshed with each other; the two second connecting rods (724) respectively have a second hinged end hinged to the lifting seat (722), and the two second hinged ends are respectively provided with a second serration portion (728) on the side close to each other, and the two second serration portions (728) are meshed with each other.