Surface microstructure light guide plate, manufacturing device and manufacturing method

Abstract

The invention discloses a surface microstructure light guide plate, a manufacturing device and a manufacturing method, the surface microstructure light guide plate comprises a base plate and a hopper used for manufacturing the base plate, and one side of the base plate is provided with a dotted microstructure; a heating extrusion device is arranged at the bottom of the hopper, a model device is arranged at the other end of the heating extrusion device, the base plate is extruded and molded through the model device, and a microstructure extrusion roller group is arranged below the model device. The dot-shaped microstructures are arranged, the dot-shaped microstructures enable light to be diffused to the periphery through dot-shaped refraction light sources, the light emitting uniformity is improved, the ratio of depth to width does not need to be controlled through a wave-shaped microstructure, the situation that the side edges of the base plate are blackened is avoided through uniform dispersion, and in order to further improve the edge brightness of the base plate, the edge brightness of the base plate is further improved. The reflection frame is arranged to reflect the edge light of the base plate, the brightness of the side edge of the base plate is improved, and the problem that the edge of the light guide plate is blackened due to the fact that the ratio of depth to width needs to be controlled and the light receiving phenomenon exists in a wave type is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of light guide plates, and in particular to a light guide plate with a surface microstructure, a manufacturing device and a manufacturing method. Background Art

[0002] The light guide plate is a transparent optical component, usually made of materials such as acrylic or polycarbonate. It can evenly distribute the light emitted by the light source to a larger area through total reflection, achieving a uniform luminous effect. It is widely used in lighting, backlight display and related light guide technologies.

[0003] During the production of the light guide plate, it is necessary to extrude the light guide plate to engrave the microstructure texture on the light guide plate. In order to further evenly diverge the light, the existing microstructure texture is generally wavy. The wavy texture has certain disadvantages. First, the ratio of its depth to width needs to be controlled in the wave shape. If the control is not good, the light reflection will be uneven. Second, the wavy microstructure is engraved on the light guide plate. Due to the light collection phenomenon, the edge of the light guide plate will become black.

[0004] Therefore, how to provide a surface microstructure light guide plate, a manufacturing device and a manufacturing method is a problem that those skilled in the art urgently need to solve. Summary of the invention

[0005] One purpose of the present invention is to provide a surface microstructure light guide plate, a manufacturing device and a manufacturing method. The present invention solves the problem that the wave shape needs to control the depth and width ratio and the light collection phenomenon causes the edge of the light guide plate to become black.

[0006] A surface microstructure light guide plate, a manufacturing device and a manufacturing method according to an embodiment of the present invention include a base plate and a hopper for manufacturing the base plate, wherein a dot-shaped microstructure is provided on one side of the base plate;

[0007] A heating extrusion device is provided at the bottom of the hopper, and a model device is provided at the other end of the heating extrusion device. The base plate is extruded and formed through the model device. A microstructure extrusion roller group is provided below the model device. One end of the base plate passes through the microstructure extrusion roller group and then extends to the other end of the microstructure extrusion roller group.

[0008] The dot-shaped microstructure includes a plurality of dot-shaped dispersed blocks distributed in a linear array.

[0009] The shape of the point-shaped dispersion blocks is a semi-elliptical column.

[0010] A diffusion film is disposed on the top of the dot-shaped microstructure to further disperse the light.

[0011] The diverging pattern is provided with corrugated grooves for dispersing light.

[0012] Reflection frames are arranged on the sides of the dispersion mold and the base plate.

[0013] A pressing printing roller group is arranged on the top of the extrusion roller, a guide roller is arranged on the other side of the pressing printing roller group, a film winding roller is arranged on the top of the pressing printing roller group, the dispersion film is wound on the surface of the film winding roller, one end of the dispersion film passes through the pressing printing roller group and is adhered to the base plate, and one end of the base plate and the dispersion film passes through the pressing printing roller group and extends to the guide roller.

[0014] A cutting device for cutting the dispersion film and the base plate is arranged on the top of the guide roller.

[0015] The specific steps of the method for manufacturing the surface microstructure light guide plate are as follows:

[0016] Step 1: Microstructure extrusion roller set mold: Use a lathe to process the microstructure extrusion roller set mold to ensure the mold accuracy and surface quality, so that the elliptical star point shape is engraved on the surface of the microstructure extrusion roller set;

[0017] Step 2: Material selection: Commonly used light guide plate materials include acrylic (PMMA) and polycarbonate (PC). Acrylic has high transparency and good mechanical properties. Choose the appropriate thickness and size according to actual needs. Here, the thickness is 3m;

[0018] Step 3: Hot melting: Place the acrylic particles into a heating extrusion device and heat them to a molten state, and then introduce the molten acrylic material into the model device;

[0019] Step 4: Processing and molding: The acrylic material is extruded into an acrylic plate through a model device. The acrylic plate is a base plate. The extrusion molding temperature of the base plate is 150 degrees Celsius. The extruded base plate is introduced into the microstructure extrusion roller group for extrusion operation, so that the base plate is completely attached to the surface of the microstructure extrusion roller group. After extrusion molding, the base plate with a microstructure is cooled by a cooling device;

[0020] Step 5: Prepare the film: select a transparent diffuse film with good optical effect, wind the diffuse film on the film roll, and then introduce the diffuse film into the pressing and printing roller group to extrude shallow corrugated grooves on the surface of the diffuse film, and then introduce the diffuse film with corrugated grooves between the pressing and printing roller group and the microstructure extrusion roller group for pressing operation, so that the diffuse film is attached to the base plate with the starlight point microstructure, and finally complete the manufacture of the surface microstructure light guide plate.

[0021] The beneficial effects of the present invention are:

[0022] By setting a point-like microstructure, the point-like microstructure refracts the light source through point shapes, so that the light is dispersed in all directions, thereby improving the uniformity of light emission, and there is no need to control the depth and width ratio like the wave-like microstructure. Such uniform dispersion also avoids the blackening of the sides of the base plate. In order to further improve the brightness of the edge of the base plate, a reflection frame is set to reflect the edge light of the base plate, thereby improving the brightness of the side of the base plate, and solving the problem of the blackening of the edge of the light guide plate due to the need to control the depth and width ratio of the wave-type and the existence of light collection phenomenon.

[0023] By setting up a dispersion film, the refraction of light is further improved through the dispersion film, the light is further evenly distributed, the light guiding performance is improved, and the point-like microstructure is protected to prevent the point-like microstructure from being contaminated by fine dust and affecting the refraction of light. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0025] Figure 1 The present invention provides a three-dimensional flow chart of the lamination positions of a base plate and a dispersion film in a surface microstructure light guide plate, a manufacturing device and a manufacturing method.

[0026] Figure 2 The present invention provides an overall three-dimensional flow chart of a surface microstructure light guide plate, a manufacturing device and a manufacturing method.

[0027] Figure 3 A cross-sectional stereoscopic flow chart of the position of the point-shaped microstructure in a surface microstructure light guide plate, a manufacturing device and a manufacturing method proposed by the present invention.

[0028] Figure 4 A partial three-dimensional flow chart of the position of the dot-shaped microstructure in a surface microstructure light guide plate, a manufacturing device and a manufacturing method proposed by the present invention.

[0029] The attached figures indicate: 1. base plate; 2. hopper; 3. dot-shaped microstructure; 4. heating extrusion device; 5. model device; 6. microstructure extrusion roller group; 7. divergent film; 8. corrugated groove; 9. reflection frame; 10. pressing and printing roller group; 11. guide roller; 12. film winding roller; 13. cutting device. DETAILED DESCRIPTION

[0030] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0031] Example 1

[0032] refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 , including a base plate 1 and a hopper 2 for manufacturing the base plate 1, a dotted microstructure 3 is arranged on one side of the base plate 1, the dotted microstructure 3 includes a plurality of dotted dispersion blocks distributed in a linear array, such an array makes the dotted dispersion blocks evenly arranged, so that the light dispersed to the surrounding area from each dotted dispersion block area is evenly distributed, thereby improving the uniformity of the light, and the shape of the dotted dispersion block is a semi-elliptical column.

[0033] refer to Figure 2 and Figure 3 A divergent film 7 for further dispersing the light is arranged on the top of the dot-like microstructure 3, and a corrugated groove 8 for dispersing the light is arranged on the divergent film. The corrugated groove 8 is different from the wavy microstructure in the background technology. The corrugated groove 8 does not need to control the ratio of the width and depth of the corrugated groove 8. The main purpose is to further improve the reflection of the light and make the dispersion film emit light evenly.

[0034] Example 2

[0035] refer to Figure 2 and Figure 3 A reflection frame 9 is provided on the side of the dispersion film and the base plate 1. The reflection frame 9 mainly blocks the side of the base plate 1 and the dispersion film, so that the light is reflected back into the base plate 1 and the dispersion film, which helps to improve the brightness of the edges of the base plate 1 and the dispersion film and avoid the situation that occurs at the edges of the base plate 1 and the dispersion film.

[0036] Example 3

[0037] refer to Figure 1, this embodiment is a device for manufacturing a base plate 1 and a dispersed film. A heating extrusion device 4 is provided at the bottom of the hopper 2. The heating base device is an existing device and is not described here. The raw materials are extruded and discharged. A model device 5 is provided at the other end of the heating extrusion device 4. After the raw materials are heated and extruded, they reach the model device 5 for shaping and discharge. The base plate 1 is extruded and formed through the model device 5. A microstructure extrusion roller group 6 is provided below the model device 5. The preparation operation of different microstructures can be achieved by replacing the microstructure extrusion roller group 6. The microstructure extrusion roller group 6 extrude the base plate 1 to form a dot-shaped microstructure 3 on the base plate 1, making it similar to a "starry sky". One end of the base plate 1 passes through the microstructure extrusion roller group 6 and extends to the other end of the microstructure extrusion roller group 6. A pressing printing roller group 10 is provided on the top of the extrusion roller. While printing the dispersed film, it is also pressed with the base plate 1. The printing roller group 10 includes two shaft rollers, one for embossing and the other for laminating, wherein the laminating shaft roller is attached to the squeezing roller 6 and the embossing shaft roller is attached to the laminating shaft roller. A guide roller 11 is arranged on the other side of the laminating printing roller group 10 to guide the laminating material. A film roll roller 12 is arranged on the top of the laminating printing roller group 10. The dispersion film is wound on the surface of the film roll roller 12. The film roll roller 12 is used to place the dispersion film roll. One end of the dispersion film passes through the laminating printing roller group 10 and is attached to the base plate 1. One end of the base plate 1 and the dispersion film passes through the laminating printing roller group 10 and extends to the guide roller 11. A cutting device 13 for slitting the dispersion film and the base plate 1 is arranged on the top of the guide roller 11. The cutting device 13 for the laminated material is mainly used to realize the manufacture of the dot microstructure 3 and the laminating operation of the dispersion film and the base plate 1. It is a manufacturing equipment used in conjunction with the above embodiment 1.

[0038] The specific steps of the method for manufacturing the surface microstructure light guide plate are as follows:

[0039] Step 1: Microstructure extrusion roller set mold: Use a lathe to process the microstructure extrusion roller set 6 mold to ensure the mold accuracy and surface quality, so that the elliptical star point shape is engraved on the surface of the microstructure extrusion roller set 6;

[0040] Step 2: Material selection: Commonly used light guide plate materials include acrylic (PMMA) and polycarbonate (PC). Acrylic has high transparency and good mechanical properties. Choose the appropriate thickness and size according to actual needs. Here, the thickness is 3m;

[0041] Step 3: Hot melting: putting the acrylic particles into the heating extrusion device 4 to heat them to a molten state, and then introducing the molten acrylic material into the model device 5;

[0042] Step 4: Processing and molding: The acrylic material is extruded into an acrylic plate through the model device 5, the acrylic plate is the base plate 1, the extrusion molding temperature of the base plate 1 is 150 degrees Celsius, and the extruded base plate 1 is introduced into the microstructure extrusion roller group 6 for extrusion operation, so that the base plate 1 is completely attached to the surface of the microstructure extrusion roller group 6. After extrusion molding, the base plate 1 with the microstructure is cooled by a cooling device;

[0043] Step 5: Prepare the film: select a transparent diffuser film 7 with good optical effect, wind the diffuser film 7 on the film roll 12, and then introduce the diffuser film 7 into the pressing and printing roller group 10, so that shallow corrugated grooves 8 are squeezed out on the surface of the diffuser film 7, and then introduce the diffuser film 7 with the corrugated grooves 8 between the pressing and printing roller group 10 and the microstructure extrusion roller group 6 for pressing operation, so that the diffuser film 7 is attached to the base plate with the starlight point microstructure, and finally complete the manufacture of the surface microstructure light guide plate.

[0044] A layer of divergent film is laid on the surface microstructure light guide plate, and the side of the light guide plate is covered with a reflective frame 9 to avoid light leakage, which can further improve the optical performance and aesthetics of the surface microstructure light guide plate. The manufacturing method includes every link from raw material preparation to the final product to ensure the high quality and high performance of the surface microstructure light guide plate. Through computer-aided design and optical simulation, the shape and arrangement of the elliptical starlight points can be accurately designed. Manufacturing methods such as hot pressing and injection molding can achieve high-precision starlight point structure. Finally, through the laying of the divergent film 7, the covering of the side reflective frame 9, post-processing and quality inspection, the performance and aesthetics of the surface microstructure light guide plate are ensured to meet the needs of different applications.

[0045] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A light guide plate with a surface microstructure, It is characterized in that The invention comprises a base plate (1) and a hopper (2) for manufacturing the base plate (1), wherein one side of the base plate (1) is provided with a dot-shaped microstructure (3).

2. A manufacturing device for a surface microstructure light guide plate, a surface microstructure light guide plate, It is characterized in that A heating extrusion device (4) is provided at the bottom of the hopper (2), a model device (5) is provided at the other end of the heating extrusion device (4), the base plate (1) is extruded through the model device (5), a microstructure extrusion roller group (6) is provided below the model device (5), and one end of the base plate (1) passes through the microstructure extrusion roller group (6) and then extends to the other end of the microstructure extrusion roller group (6).

3. A surface microstructure light guide plate according to claim 2, It is characterized in that The dot-shaped microstructure (3) comprises a plurality of dot-shaped dispersed blocks distributed in a linear array.

4. The surface microstructure light guide plate according to claim 3, It is characterized in that The shape of the point-shaped dispersion blocks is a semi-elliptical column.

5. A surface microstructure light guide plate according to claim 4, It is characterized in that A diverging film (7) is arranged on the top of the dot-shaped microstructure (3) for further dispersing light.

6. A surface microstructure light guide plate, manufacturing device and manufacturing method according to claim 5, It is characterized in that The diverging pattern is provided with corrugated grooves (8) for dispersing light.

7. A surface microstructure light guide plate according to claim 6, It is characterized in that A reflection frame (9) is provided on the side of the dispersion mold and the base plate (1).

8. The manufacturing device of the surface microstructure light guide plate according to claim 7, It is characterized in that A pressing printing roller group (10) is arranged on the top of the squeezing roller, a guide roller (11) is arranged on the other side of the pressing printing roller group (10), a film winding roller (12) is arranged on the top of the pressing printing roller group (10), a dispersion film is wound on the surface of the film winding roller (12), one end of the dispersion film passes through the pressing printing roller group (10) and is bonded to the base plate (1), and one end of the base plate (1) and the dispersion film passes through the pressing printing roller group (10) and extends to the guide roller (11).

9. The manufacturing device of the surface microstructure light guide plate according to claim 8, It is characterized in that A cutting device (13) for cutting the dispersion film and the base plate (1) is arranged on the top of the guide roller (11).

10. A method for manufacturing a light guide plate with a surface microstructure according to claims 1-9, It is characterized in that The specific steps of the method for manufacturing the surface microstructure light guide plate are as follows: Step 1: Microstructure extrusion roller set mold: Use a lathe to process the microstructure extrusion roller set (6) mold, ensure the mold accuracy and surface quality, and make the elliptical star point shape engraved on the surface of the microstructure extrusion roller set (6); Step 2: Material selection: Commonly used light guide plate materials include acrylic (PMMA) and polycarbonate (PC). Acrylic has high transparency and good mechanical properties. Choose the appropriate thickness and size according to actual needs. Here, the thickness is 3m; Step 3: Hot melting: placing the acrylic particles into a heating extrusion device (4) to heat them to a molten state, and then introducing the molten acrylic material into a model device (5); Step 4: Processing and molding: The acrylic material is extruded into an acrylic plate through a model device (5), the acrylic plate is a base plate (1), the base plate (1) is extruded at a temperature of 150 degrees Celsius, the extruded base plate (1) is introduced into a microstructure extrusion roller group (6) for extrusion, so that the base plate (1) is completely attached to the surface of the microstructure extrusion roller group (6), and the base plate (1) with a microstructure after extrusion is cooled by a cooling device; Step 5: Prepare the film: select a transparent diffuser film (7) with good optical effect, wind the diffuser film (7) on a film roll (12), and then introduce the diffuser film (7) into a pressing and printing roller group (10) so that shallow corrugated grooves (8) are squeezed out on the surface of the diffuser film (7), and then introduce the diffuser film (7) with the corrugated grooves (8) between the pressing and printing roller group (10) and the microstructure extrusion roller group (6) for pressing operation, so that the diffuser film (7) is attached to the base plate (1) with the starlight point microstructure, and finally the manufacture of the surface microstructure light guide plate is completed.

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