CN101498859A - Multifunctional optical sheet and method for manufacturing same - Google Patents

Abstract

A multifunctional optical sheet is prepared as coating adhesive on light incident surface and light emergent surface of substrate to form coating layer, transferring said coating layer to substrate surface by pressing or rolling mode, irradiating coating layer by ultraviolet ray or not only ultraviolet ray irradiator, heating and pressing by heating and pressing device to make it be dried and solidified for forming, removing coating layer and forming coating layer by solidification for forming.

Description

Multifunctional optical thin plate and its manufacturing method

technical field

The invention relates to a multifunctional optical thin plate and a manufacturing method thereof, which belong to the fields of electronic appliances, computers, information and communication, and specifically belong to the technical field of providing the display mode of a backlight module in the field of electronic appliances, computers, information and communication .

Background technique

Backlight module (Backlight module) refers to the module that can provide the back light source of electronic products. At present, it is mainly used in various information, communication and consumer products, such as: liquid crystal display, film scanner, slide viewing box and advertising light box etc., and can be used with traditional lighting fixtures and equipment, so that the light in weaker areas can be more sufficient. However, since the liquid crystal in the LCD panel itself does not have light-emitting characteristics, in order to achieve the display effect, the LCD panel must be provided with a The function of the backlight module is to provide a surface light source with sufficient luminance and uniform distribution to the liquid crystal display panel.

The structure of the commonly used backlight module is mainly composed of a light source, a light guide plate, a reflective polarizer, a diffuser plate, and a prism layer, etc., and each light source can be a straight, U-shaped or other continuously bent shape. The light guide plate is used to guide the incident light to be converted into a surface light source through scattering and reflection of the light guide plate. In order to make the luminance of the surface light source more evenly distributed, a diffuser plate is usually installed on the light-emitting side of the light guide plate, and the liquid crystal display The display effect of the panel is that the light emitted by each light source forms a diffusion effect, so as to improve the phenomenon that light and dark bands are formed on the liquid crystal module due to the absence of light at the space between the light sources.

Based on the above, since the diffusion plate is composed of a substrate, and contains a plurality of diffusion particles in the substrate, each diffusion particle is scattered in the substrate, so that it can refract light to produce a diffusion effect, and the substrate is made of polycarbonate Made of resin (PC), acrylic or polymethyl methacrylate (PMMA) material, it has a light incident surface and a light exit surface, and a certain thickness is formed between the light incident surface and the light exit surface, and when When the light passes through the diffusion particles in the substrate, it will produce a refraction effect with an appropriate angle. The thickness of the diffusion plate is relatively high, which makes the material cost relatively high, and the assembly process is complicated, time-consuming and labor-intensive, and due to the existence of the diffusion plate , There will be light loss between the light guide plate and the prism layer, which will reduce the luminance and affect the overall optical performance.

Secondly, in order to solve the lack of the above-mentioned diffusion plate, some manufacturers have developed this kind of light guide plate with diffusion function, which uses the particle coating method to adhere the diffusion particles to the substrate with an adhesive (such as: UV glue or resin). Surface, so as to form a light diffusion structure, so that the light source can achieve the purpose of uniformity of the light source through the scattering of the diffusion particles, and the light diffusion structure is integrated with the light-emitting surface of the substrate, so that the light loss is reduced accordingly, and the diffusion plate can be omitted Therefore, the cost can also be reduced; in addition, materials with light diffusion can be used for screen printing, or direct injection molding can be used to generate diffusion points to destroy the total reflection of light so that the light can be refracted out of the substrate surface, and the points can be reused. Density or size can achieve the effect of preliminary homogenization; it can also be used to form a diffusion layer on the light-emitting surface of the substrate by grinding. In manufacturing, the light-emitting surface of the substrate is ground by grinding materials and a rotary grinder Or, a composite light guide plate can be manufactured by mechanical embossing to replace additional optical components, such as: optical film or prism sheet, etc., and a three-dimensional pattern is rolled on the surface of the substrate, such as: Triangle, square, semicircle or rhombus, etc., are three-dimensional patterns that are pre-marked on the calendering roller and transferred to the surface by embossing, which can match the arrangement and adjustment of the light source, and have focusing and astigmatism. or polarized light, and effectively reduce the use of optical components and their absorption of light sources; moreover, it is also possible to choose a wet etching process through strong acid or strong alkali substances, which is to coat a photoresist layer on the surface of the substrate and use a photomask A photoresist pattern is formed by exposing and developing the photoresist layer, and a diffusion layer can be formed on the light-emitting surface of the substrate after wet etching.

However, the disadvantage of the above-mentioned particle coating method is that due to factors such as gravity or static electricity, the diffusion particles in the diffusion film cannot be evenly distributed in the adhesive (such as: UV glue or resin), so that the light diffusion of the diffusion layer made The effect is not good, and the particle coating method requires careful and complicated selection of particle size distribution to control the degree of light diffusion, and this method of adding diffusing particles will also reduce its light use efficiency due to absorption of light sources; however, using Screen printing uses a mold with a three-dimensional pattern on the roller to imprint on the surface of the substrate after being glued with the adhesive, resulting in uneven printing during printing, and additional printing is required if the method is injection molding. The mold and cost are expensive, and it will also cause volume shrinkage, deformation and other defects caused by underfilling and cooling and solidification; in addition, the methods of grinding and mechanical embossing need to be directly or It is heated and softened before machining to complete the diffusion layer. However, in various machining processes, defects are easy to occur and damage or reduce the structural strength of the substrate. Therefore, the substrate must have a certain thickness. It is enough to strengthen the overall structure, so that the cost of materials and manufacturing cannot be effectively reduced; in addition, the wet etching method is used to make the surface pattern of the substrate, because the directionality of chemical etching on the surface of the substrate is not easy to control, resulting in the accuracy of the surface pattern of the substrate. It is not high, the resolution is not good, its production time is too long and the cost of equipment is high, which increases the difficulty of processing in the manufacturing process, and the quality and yield cannot be effectively improved.

Therefore, how to solve the above-mentioned conventional problems and deficiencies is the direction that relevant manufacturers engaged in this industry want to study and improve.

Contents of the invention

The invention provides a multi-functional optical thin plate and its manufacturing method, which can make the light projected from the substrate go through the light refraction or diffraction of the three-dimensional pattern on the optical structure film, and then make the light uniform and condense the light to produce upward concentration The uniform surface light source can effectively reduce light loss, improve the efficiency of light energy use, increase the effective brightness of the light source, and achieve the effect of eliminating bright bands and shadows generated by the light source.

The main purpose of the present invention is that the light-incident surface or the light-exit surface of the substrate is coated with an adhesive (such as: UV glue or resin) to form a coating layer, and by forming a metal material or a non-metallic material with a three-dimensional pattern Mold, which is transferred to the surface of the substrate by pressing or rolling to reproduce the shape of the three-dimensional pattern, while using ultraviolet light or not limited to ultraviolet light irradiation device to irradiate the coating layer, or through heating or pressure equipment Heat to make it dry quickly and solidify into shape, and after the coating layer is cured and formed, then remove the forming mold, or after the forming mold is removed, the coating layer is cured and formed, and the optical thin plate can be produced finished product.

The secondary purpose of the present invention is that the optical structure film can diffuse the light uniformly from the light-emitting surface of the substrate, so that the light projected from the substrate can be homogenized by the light refraction of the three-dimensional pattern on the optical structure film. And condense the light to produce an upwardly concentrated uniform surface light source, which is used to reduce or replace the use of additional optical components and the absorption of the light source, which can effectively reduce light loss, thereby improving light use efficiency and increasing the brightness of the backlight module. And can achieve the effect of eliminating bright bands and shadows generated by the light source.

Another object of the present invention is that the substrate and the optical structure film can be made of two same or different materials, that is, they have different media for light to pass through, so that the light refraction reaction and polarization effect are also different. It is not the same, and the structural change of the optical structure film can be used to enhance the effect of light refraction, and no additional optical components are required.

Another object of the present invention is that the design of the three-dimensional pattern on the surface of the optical structure film can be mass-produced according to the actual situation, and can be modularized and flexible in accordance with the scattering of the outgoing light, the brightness requirements, and the position of the light source configuration. Manufactured and used, in this way, it can have the function of diffusing, concentrating or polarizing light, so as to achieve the purpose and effect of different optical properties.

In order to achieve the above object, the technical scheme of the multifunctional optical thin plate of the present invention and its manufacturing method is as follows:

A method for manufacturing a multifunctional optical thin plate, comprising a substrate and an optical structural film, and its implementation steps:

(A) On the predetermined surface of the substrate, at least one or more light-incoming surfaces for receiving light and light-emitting surfaces for refracting light are respectively provided;

(B) coating the adhesive on the light-incident surface or the light-exit surface of the substrate to form a coating layer;

(C) By means of a forming mold with a three-dimensional pattern, it is transferred to the surface of the substrate in a pressing or rolling manner to replicate the shape of the three-dimensional pattern;

(D) Utilize the ultraviolet light UV irradiation device to irradiate the coating layer, or heat it through heating equipment, so that it can be quickly dried and cured to form a film with an optical structure;

(E) After the coating layer is cured and formed, the forming mold is removed, or after the forming mold is removed, the coating layer is cured and formed to produce a finished optical sheet.

It is characterized in that the substrate in the step (A) can be made of glass, plastic, rubber, polyolefin compound, polyester compound or organic polymer with translucent, semi-transparent or partially translucent material.

The substrate can be polymethyl methacrylate PMMA, polycarbonate PC, polyethylene PE, methyl methacrylate-styrene copolymer MS, polyethylene terephthalate PET, cellulose triacetate TAC, Made of polystyrene PS, cycloolefin copolymer COC or cycloolefin polymer COP and other materials.

The method of coating the adhesive agent in the step (B) on the surface of the substrate is to form a coating layer by using rotary, dipping, roller, doctor blade, spraying or extrusion coating methods.

The adhesive in this step (B) can be ultraviolet light-curable materials such as ultraviolet light-curable adhesive resin UVCure Resin, ultraviolet light-curable adhesive UV glue, or curable polymer fluids with optical properties such as heat-curable materials, polymers, and resins. Material.

The step (C) forming mold can be made of metal material or non-metal material, and the three-dimensional pattern on it can be triangular, square, semicircular or rhombus, etc., and the cross-sectional shape can be symmetrical or asymmetrical, regular Or irregularly arranged three-dimensional patterns such as waves, zigzags, and square teeth.

The optical thin plate cured and formed in step (E) can be further installed and used in lighting fixtures and equipment, so that the light projected from the substrate is a single-directional and vertically projected surface light source.

The thickness range of the structure after the integral solidification and molding of the substrate and the optical structure film is between 0.1 mm and 5 mm.

The adhesive can be ultraviolet light-curable materials such as ultraviolet light-curable adhesive resin UV Cure Resin, ultraviolet light-curable adhesive UV glue, or curable polymer fluid materials with optical properties such as heat-curable materials, polymers, and resins.

A multifunctional optical thin plate structure, including a substrate and an optical structural film, wherein:

The surface of the substrate is respectively provided with one or more light-incoming surfaces for receiving light and light-emitting surfaces for refracting light;

The optical structure film is coated with an adhesive, matched with a forming mold to transfer the three-dimensional pattern, and solidified and formed on the surface of the substrate.

The substrate can be made of glass, plastic, rubber, polyolefin compound, polyester compound or organic polymer with light transmission, semi-transmission or partial light transmission.

The substrate can be polymethyl methacrylate PMMA, polycarbonate PC, polyethylene PE, methyl methacrylate-styrene copolymer MS, polyethylene terephthalate PET, cellulose triacetate TAC, Made of polystyrene PS, cycloolefin copolymer COC or cycloolefin polymer COP and other materials.

The adhesive can be ultraviolet light-curable materials such as UV Cure Resin, ultraviolet light-curable glue UV glue, or curable polymer fluid materials with optical properties such as heat-curable materials, polymers, and resins.

The three-dimensional pattern on the optical structure film can be triangular, square, semicircular or rhombus, and the cross-sectional shape can be symmetrical or asymmetrical, regular or irregular arrangement of three-dimensional patterns such as wavy, zigzag, square-toothed and wavy.

The optical thin plate composed of the substrate and the optical structure film can be further installed and used in lighting fixtures and equipment, so that the light projected by the substrate is a single-directional and vertically projected surface light source.

The overall thickness range of the substrate and the optical structure film is between 0.1 mm and 5 mm.

The multifunctional optical thin plate of the present invention and its manufacturing method have the following advantages:

1. The present invention uses the adhesive to coat the surface of the substrate to form a coating layer, and transfers the three-dimensional pattern pre-drawn on the molding mold to the surface of the substrate by pressing to carry out the shape of the three-dimensional pattern. Replication, and at the same time, the coating layer is irradiated with an ultraviolet light irradiation device to make it dry quickly, solidify and form, and then remove the forming mold to produce the structure of the optical thin plate.

2. After the light projected by the substrate is refracted by the three-dimensional pattern on the optical structure film, it can be scattered and reflected to the outside and converted into a surface light source, and the luminance of the surface light source can be more uniformly distributed to reduce Or replace the use of additional optical components (such as: convex lens, concave lens or prism sheet) and its absorption of light source, which can effectively reduce light loss.

3. The material of the substrate and the optical structure film can be made of two identical or different materials, that is, they have different media for light to penetrate, so that the light refraction reaction and polarization effect are also different, and can be used The structural changes of the optical structure film can enhance the effect of light refraction and diffraction, and no additional optical components are required.

4. The design of the three-dimensional pattern on the surface of the optical structure film can be mass-produced according to the actual situation, and it can be used in modular flexible manufacturing in accordance with the scattering of the outgoing light, the brightness requirements, and the position of the light source configuration. In this way, it can have The function of diffusing, concentrating or polarizing light can achieve the purpose and effect of different optical properties.

5. The structure of the optical structure film does not need to add any diffusion particles. After the light projected by the substrate is refracted by the three-dimensional pattern on the optical structure film, the light can be condensed and a uniform surface light source concentrated upwards can be generated. Improve the efficiency of light use, increase the luminance of the backlight module, and eliminate the effect of bright bands and shadows generated by the light source.

6. The optical structure film is pressed by the forming mold, and at the same time, the coating layer is irradiated by the ultraviolet light irradiation device, so that the structure produced after curing and forming will not have uneven printing caused by screen printing, or use The injection molding method requires additional mold opening, which is costly, and there are volume shrinkage and deformation due to insufficient injection, cooling and solidification.

7. In the manufacturing process, it is not necessary to use grinding and mechanical embossing to complete the diffusion layer by machining the light-emitting surface of the substrate directly or after being softened by heating, so as to avoid damage or reduce The original structural strength of the substrate, and the thickness of the formed optical thin plate structure is relatively thin, which not only meets the demand for thinning, but also can relatively reduce the cost of materials and manufacturing.

8. Compared with the use of wet etching to make the surface pattern of the substrate, which will cause defects and problems due to the difficulty in controlling the directionality of chemical etching on the substrate surface, the three-dimensional pattern on the optical structure film of the present invention has high precision and high resolution. It has the best advantages, and can simplify the operation steps during use, shorten the manufacturing man-hour, and reduce the cost of using process equipment, thereby effectively improving the output quality and yield.

9. The optical structure film can be a single or multi-layer structure, and can also be directly formed on the light incident surface or the light exit surface on one side of the substrate, or formed with convex lenses, concave lenses or prisms on the light incident surface and the light exit surface on both sides of the substrate. Optical components can also be made of different types of optical structural films on the same side or different sides of multiple channels.

Description of drawings

Figure 1 is a three-dimensional appearance view of the structure of the optical thin plate of the present invention.

Fig. 2 is the flow chart of the manufacturing method of optical thin plate of the present invention.

Fig. 3 is the processing flow chart (1) of the processing and manufacturing of the optical thin plate of the present invention.

Fig. 4 is the processing flow chart (2) of the processing and manufacturing of the optical thin plate of the present invention.

Figure 5 is a schematic side view (1) of a preferred embodiment of the optical thin plate of the present invention.

Figure 6 is a schematic side view (2) of a preferred embodiment of the optical thin plate of the present invention.

Figure 7 is a schematic side view (3) of a preferred embodiment of the optical thin plate of the present invention.

Description of main component symbols

1 Substrate

11 Light-incoming side 12 Light-emitting side

2 Optical structure film

21 three-dimensional pattern

3 Forming mold

31 three-dimensional pattern

Detailed ways

In order to achieve the above-mentioned purpose and effect, the technical means and the structure thereof adopted in the present invention are hereby illustrated in detail with respect to the preferred embodiments of the present invention. Its features and functions are as follows, so as to fully understand.

Please refer to FIG. 1, which is a three-dimensional appearance view of the structure of the optical thin plate of the present invention. It can be clearly seen from the figure that the multifunctional optical thin plate of the present invention and its manufacturing method include a substrate 1 and an optical structure film 2. consisting of:

The substrate 1 can be made of glass, plastic, rubber, polyolefin compound, polyester compound or organic polymer with light transmission, semi-transmission or partial light transmission, and the substrate 1 can also be polymethyl Methyl methacrylate (Polymethyl methacrylate, PMMA), polycarbonate (Polycarbonate, PC), polyethylene (Polyethylene, PE), methyl methacrylate-styrene copolymer (Methylmethacrylate-styrene copolymer, MS), polyterephthalene Polyethylene terephthalate (PET), triacetyl cellulose (TAC), polystyrene (Polystyrene, PS), cycloolefin copolymer (Cyclo olefin copolymer, COC) or cycloolefin polymer (Cyclo Olefin polymer, COP) and other materials, and one or more light incident surfaces 11 for receiving light and light exit surfaces 12 for refracting light are respectively formed on the surface of the substrate 1.

The optical structure film 2 can be firstly arranged on the light incident surface 11 on one side of the substrate 1, and then arranged on the light emitting surface 12 on the other side; or, it can also be arranged on the light emitting surface 12 on one side of the substrate 1 first, and then arranged on the other side. on the light incident surface 11; in addition, the processing and manufacturing process of the optical structure film 2 can also be carried out on the light incident surface 11 and the light exit surface 12 on both sides at the same time, so that the thickness range of the structure after the substrate 1 and the optical structure film 2 are integrally cured The thickness is between 0.1 mm and 5 mm, and the optical structure film 2 can have structures with different three-dimensional patterns 21, such as triangles, squares, semicircles or rhombuses, etc., but the above-mentioned structural shapes are only preferred embodiments of this creation That’s all, not to limit the patent scope of this creation, but all simple modifications and equivalent structural changes made by using the content of this creation manual and drawings should be included in the patent scope of this creation, but not limited to The shape described above, and its cross-sectional form can be symmetrical or asymmetrical, regular or irregular arrangement of three-dimensional patterns 21 such as waves, zigzags, square tooth waves (please refer to Fig. 5, Fig. 6 and Fig. 7 at the same time) As shown), the light emitted by the light source is incident from the light incident surface 11 of the substrate 1, and after the light refraction of the optical structure film 2, it is scattered and reflected on the light exit surface 12 of the substrate 1 to be converted into a surface light source. , and can make the luminance distribution of this surface light source more uniform.

Please refer to Fig. 2, shown in Fig. 3, Fig. 4, it is the flow chart of manufacturing method of optical thin plate of the present invention, the flow chart of processing and manufacturing of optical thin plate (1) and the flow chart of processing and manufacturing (two), can be shown in the figure It is clearly seen that when utilizing the multifunctional optical thin plate and method thereof manufactured by the present invention, it is carried out according to the following implementation steps:

Step (101) On the predetermined surface of the substrate 1, at least one or more than one light incident surface 11 for receiving light and light exit surface 12 for refracting light can be respectively provided.

Step (102) coating the adhesive on the light-incident surface 11 or the light-exit surface 12 of the substrate 1, which can be processed by rotary, dipping, scraper, roller, spraying or extrusion coating methods. , forming a coating layer; and the adhesive can be a paste-like or film-like ultraviolet light-curable material or a thermal-curable material.

Step (103) transfer the metal or non-metal forming mold 3 with the three-dimensional pattern 31 onto the surface of the substrate 1 by pressing or rolling to replicate the shape of the three-dimensional pattern 31 .

Step (104) irradiating the coating layer with an ultraviolet light (UV) irradiation device, or heating it through a heating device, so that it is quickly dried and solidified to form the optical structure film 2 .

Step (105) After the coating layer is cured and formed, the forming mold 3 is removed, or after the forming mold 3 is removed, the coating layer is cured and formed to produce the finished optical sheet 2 .

In the optical thin plate structure obtained by this manufacturing method, when the light source generates light, the light will enter the substrate 1 from the light incident surface 11, and then pass through the optical structure film 2 on the light exit surface 12, and the optical structure The film 2 mainly diffuses the light from the light-emitting surface 12 on the other side of the substrate 1 evenly, so that the light projected from the substrate 1 can be homogenized and condensed after being refracted by the three-dimensional pattern 21 on the optical structure film 2 Generate an upwardly concentrated uniform surface light source to reduce or replace the use of additional optical components (such as: optical film or prism sheet) and its absorption of the light source, which can effectively reduce light loss, thereby improving light use efficiency, Increase the effective brightness of the light source, and achieve the effect of eliminating bright bands and shadows generated by the light source, and the thickness of the formed optical thin plate structure is relatively thin, which not only meets the needs of thinning, but also can relatively reduce materials and manufacturing the cost of.

Secondly, compared with the limited efficiency of polarized light caused by conventional light refraction with only a single medium, the materials of the substrate 1 and the optical structure film 2 of the present invention can be made of two identical or different materials, which can supply light There are different media when penetrating, so that the light refraction reaction and polarization effect are also different, and the structural changes of the optical structure film 2 can be used to enhance the effect of light refraction, and there is no need to add other optical components, because the three-dimensional pattern The design of 21 can be mass-manufactured according to the actual situation, and can be modularized and flexibly manufactured in accordance with the scattering of the outgoing light, the brightness requirements, and the position of the light source configuration. function, so as to achieve the purpose and effect of different optical properties, and make the three-dimensional pattern 21 on the optical structure film 2 have the advantages of high precision and good resolution, and can simplify the operation steps during use, shorten the manufacturing time, and Reduce the cost of using process equipment, which can effectively improve the quality and yield of output.

On the other hand, the above-mentioned adhesive (such as: UV glue or resin) can be coated on the surface of the substrate 1 to form a coating layer, and irradiated by an ultraviolet light irradiation device, or heated by a heating device, and Cooperating with the three-dimensional pattern 31 of the forming mold 3, it can be photocured or thermally cured to form an optical thin plate structure by transfer printing. The side light incident surface 11 or the light exit surface 12, or the light incident surface 11 and the light exit surface 12 on both sides of the substrate 1 are respectively formed with optical components such as convex lenses, concave lenses or prism sheets. Different types of optical structure films 2 can be made on both sides.

Also, the adhesive agent is coated on the surface of the substrate 1, in addition to the processing and coating methods such as rotary, dipping, scraper, roller, spraying or extrusion, it can also be sputtered. Or printing and other methods to form a coating layer, and the present invention mainly uses the processing and coating method as an example, but in actual application, it is not limited to the processing and coating method, and the adhesive can also be ultraviolet light Curing materials, such as: ultraviolet light curing adhesive resin (UV Cure Resin) and ultraviolet light curing adhesive (UV glue) or thermal curing materials, polymers, resins and other curable polymer fluid materials with optical properties, so all can be achieved The methods, steps, and processes of the aforementioned effects should be covered by the present invention, and such simple modifications and equivalent structural changes should be included in the scope of the patent of the present invention in the same way, and should be stated together.

Furthermore, the optical thin plate structure of the present invention can be further directly installed and matched with traditional lighting fixtures and equipment, such as: fluorescent lamp holders, table lamp holders, projection lamps, vehicle lamp holders or traffic lights, etc. The key point of the invention, so only a brief description in this specification for understanding, is to make the light diffuse evenly from the light-emitting surface 12 of the substrate 1, so as to solve the problem that the light of traditional lighting fixtures and equipment is diffused. The light projected to reach the substrate 1 is a single-direction and vertically projected surface light source, and does not produce glare and multiple shadows when irradiated, and the light source can be multiple light-emitting diodes, bulbs, lamps or various possible The light-emitting components that display bright light to the outside can be used to adjust the required color and brightness. Therefore, all simple modifications and equivalent structural changes made by using the description and drawings of the present invention should be included in the scope of the present invention. Within the scope of the patent, I will cooperate with Chen Ming.

The above-mentioned multifunctional optical thin plate of the present invention and its manufacturing method have the following advantages in actual use, such as:

1. In the present invention, the adhesive is coated on the surface of the substrate 1 to form a coating layer, and the three-dimensional pattern 31 pre-drawn on the molding mold 3 is transferred to the surface of the substrate 1 by pressing to carry out For the replication of the shape of the three-dimensional pattern 31, the coating layer is irradiated by an ultraviolet light irradiation device to make it dry and solidified quickly, and then the forming mold 3 is removed to produce an optical thin plate structure.

2. Based on the above, the light projected by the substrate 1 can be converted into a surface light source through scattering and reflection after being refracted by the three-dimensional pattern 21 on the optical structure film 2, and the brightness of the surface light source can be increased. A more uniform distribution is used to reduce or replace the use of additional optical components (such as convex lenses, concave lenses or prism sheets) and their absorption of light sources, which can effectively reduce light loss.

3. Secondly, the materials of the substrate 1 and the optical structure film 2 can be made of the same or different materials, that is, they have different media for the light to pass through, so that the light refraction reaction and polarization effect are also different. , and the structural changes of the optical structure film 2 can be used to enhance the effects of light refraction and diffraction, and no additional optical components are required.

4. The design of the three-dimensional pattern 21 on the surface of the optical structure film 2 can be mass-produced according to the actual situation, and can be modularized and flexibly manufactured in accordance with the scattering of the outgoing light, the brightness requirements, and the position of the light source configuration. In this way, It can have the functions of diffusing, concentrating or polarizing light, so as to achieve the purpose and effect of different optical properties.

5. The structure of the optical structure film 2 does not need to add any diffusing particles, the light projected from the substrate 1 can be refracted by the three-dimensional pattern 21 on the optical structure film 2, and the light can be condensed and produce a uniform upward concentration. The surface light source can improve the efficiency of light use, increase the luminance of the backlight module, and eliminate the bright band and shadow effect generated by the light source.

6. In addition, the optical structure film 2 is pressed by the forming mold 3, and the coating layer is irradiated with an ultraviolet light irradiation device to cure and form the structure, which does not cause printing failures like screen printing. Uniformity, or injection molding, which requires additional mold opening, which costs a lot of money, and there are volume shrinkage, deformation and other defects due to under-injection, cooling and solidification.

7. On the other hand, in the manufacturing process, it is not necessary to grind and mechanically emboss the light-emitting surface 12 of the substrate 1 directly or after being softened by heating and then perform mechanical processing to complete the diffusion layer. It can avoid damage or reduce the original structural strength of the substrate 1 , and the formed optical thin plate has a thinner structure, which not only meets the requirement of thinning, but also relatively reduces the cost of materials and manufacturing.

8. In addition, compared with the use of wet etching to make substrate surface patterns, defects and problems will be caused by the difficult control of the directionality of chemical etching on the substrate surface. The three-dimensional pattern 21 on the optical structure film 2 of the present invention has high precision. , resolution is also good, and can simplify the operation steps during use, shorten the manufacturing man-hour, and reduce the cost of process equipment, which can effectively improve the output quality and yield.

9. Furthermore, the optical structure film 2 can be a single or multi-layer structure, and can also be directly on the light incident surface 11 or the light exit surface 12 on one side of the substrate 1, or on the light incident surface 11 and the light exit surface 12 on both sides of the substrate 1. Optical components such as convex lenses, concave lenses, or prisms are respectively molded, and different types of optical structure films 2 can be made on the same side or different sides of multiple lanes.

The above detailed description is just a description of a preferred feasible embodiment of the present invention, but this embodiment is not used to limit the scope of the patent application of the present invention, and all other equivalent changes that do not deviate from the spirit of the technology disclosed in the present invention All modifications and modifications shall be included in the patent scope covered by the present invention.

Claims (15)

1. A method for manufacturing a multifunctional optical thin plate, comprising a substrate and an optical structure film, characterized in that the implementation steps: (A) On the predetermined surface of the substrate, at least one or more light-incoming surfaces for receiving light and light-emitting surfaces for refracting light are respectively provided; (B) coating the adhesive on the light-incident surface or the light-exit surface of the substrate to form a coating layer; (C) By means of a forming mold with a three-dimensional pattern, it is transferred to the surface of the substrate in a pressing or rolling manner to replicate the shape of the three-dimensional pattern; (D) Utilize the ultraviolet light UV irradiation device to irradiate the coating layer, or heat it through heating equipment, so that it can be quickly dried and cured to form a film with an optical structure; (E) After the coating layer is cured and formed, the forming mold is removed, or after the forming mold is removed, the coating layer is cured and formed to produce a finished optical sheet. 2. The method for manufacturing a multifunctional optical sheet according to claim 1, characterized in that the substrate in step (A) can be made of glass, plastic, rubber, polyolefin compound, polyester compound or organic polymer It can be made into a transparent, semi-transparent or partially transparent material. 3. The manufacturing method of multifunctional optical thin plate as claimed in claim 1, characterized in that the substrate can be polymethyl methacrylate PMMA, polycarbonate PC, polyethylene PE, methyl methacrylate-styrene copolymer It is made of materials such as MS, polyethylene terephthalate PET, cellulose triacetate TAC, polystyrene PS, cycloolefin copolymer COC or cycloolefin polymer COP. 4. The manufacturing method of multifunctional optical thin plate as claimed in claim 1, characterized in that the method of coating the adhesive on the surface of the substrate in the step (B) is a rotary type, a dipping type, a roller type, a scraper type, etc. A coating layer is formed by processing and coating methods such as formula, spray coating or extrusion. 5. The manufacturing method of multifunctional optical thin plate as claimed in claim 1, characterized in that the adhesive in the step (B) can be ultraviolet light curing materials such as ultraviolet light curing adhesive resin UV Cure Resin, ultraviolet light curing glue UV glue, etc. , or curable polymer fluid materials with optical properties such as thermosetting materials, polymers, resins, etc. 6. The manufacturing method of multifunctional optical thin plate as claimed in claim 1, characterized in that the forming mold in step (C) can be made of metal material or non-metal material, and the three-dimensional pattern on it can be triangular, Square, semicircular or diamond, etc., and the cross-sectional shape can be symmetrical or asymmetrical, regular or irregular arrangement of wavy, zigzag, square tooth wave and other three-dimensional patterns. 7. The method of manufacturing a multifunctional optical thin plate as claimed in claim 1, wherein the optical thin plate cured and shaped in step (E) can be further installed and used in lighting fixtures and equipment for projection from the substrate. The ray is a single pointing and vertically projected surface light source. 8. The method for manufacturing a multi-functional optical thin plate as claimed in claim 1, wherein the thickness of the substrate and the optical structural film after solidification and molding is in the range of 0.1 mm to 5 mm. 9. A multifunctional optical thin plate structure, comprising a substrate and an optical structural film, characterized in that: The surface of the substrate is respectively provided with one or more light-incoming surfaces for receiving light and light-emitting surfaces for refracting light; The optical structure film is coated with an adhesive, matched with a forming mold to transfer the three-dimensional pattern, and solidified and formed on the surface of the substrate. 10. The multifunctional optical thin plate structure as claimed in claim 9, characterized in that the substrate can be made of glass, plastic, rubber, polyolefin compound, polyester compound or organic polymer with light-transmitting, semi-transparent Light or partially transparent materials. 11. The multifunctional optical thin plate structure according to claim 9, characterized in that the substrate can be polymethyl methacrylate PMMA, polycarbonate PC, polyethylene PE, methyl methacrylate-styrene copolymer MS , polyethylene terephthalate PET, cellulose triacetate TAC, polystyrene PS, cycloolefin copolymer COC or cycloolefin polymer COP and other materials. 12. The manufacturing method of multifunctional optical thin plate as claimed in claim 1, characterized in that the adhesive can be ultraviolet light curing materials such as ultraviolet light curing adhesive resin UV Cure Resin, ultraviolet light curing glue UV glue, or heat Curable polymer fluid materials with optical properties such as curable materials, polymers, and resins. 13. The multifunctional optical thin plate structure according to claim 9, characterized in that the three-dimensional pattern on the optical structural film can be triangular, square, semicircular or rhombus, and the cross-sectional shape can be symmetrical or asymmetrical, regular or Irregularly arranged wavy, zigzag, square-toothed and other three-dimensional patterns. 14. The multifunctional optical thin plate structure according to claim 9, characterized in that the optical thin plate composed of the substrate and the optical structural film can be further installed and used in lighting fixtures and equipment for the light projected by the substrate , which is a single pointing surface light source with vertical projection. 15. The multifunctional optical thin plate structure according to claim 9, characterized in that the overall thickness of the substrate and the optical structural film is between 0.1 mm and 5 mm.

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