TW530000B - Method of manufacturing Fresnel lens - Google Patents

Abstract

Disclosed is a method of manufacturing Fresnel lens, including the steps of: locally applying an optical curing adhesive to a Fresnel mold; coating an acrylic substrate over the Fresnel mold applied with the optical curing adhesive by roll-pressing; illuminating a light beam towards the acrylic substrate and the Fresnel mold to cure the optical curing adhesive; detaching the optical curing adhesive from the Fresnel mold to obtain a Fresnel lens.

Description

530000

V. Description of the Invention (1) [Field of the Invention] The present invention relates to a method for manufacturing a Fresnel lens, in particular, a method for manufacturing a Fresnel lens using a local glue method to apply light-solidifying glue. [Knowledge The higher the quality, the higher the quality of the display. The Fresnel light is within the angle, the Fresnel chart is hot-pressed, and a large size of Fresnel is acrylized. The technology of HDTV and DVD Player Pulai has been valued by the market. Under consideration of price, it is one of the development directions. Generally speaking, the rear projection screen is the screen that enters the viewer's eyes, and it is thin and light. Therefore, the main function of increasing the contrast of the image and solving the lens is to gather the light to make the original divergent to increase the brightness of the image. The structure of the eye lens is mainly composed of case resin. Its manufacturing method is' but the product size is generally continuous. The products with limited production processes can only be batch-molded. Ester, polypropylene resin or scale mold method is used in the acrylic large-screen and large-sized display image large-sized display. As the projection television is made into the image projection of the projector in the optoelectronic industry, it is worn on the market. The large size and high design need to take into account the image variation of the viewing angle. Among them, the light emitted by the projector with a large divergence angle can be focused on the viewer's view. An acrylic sheet and a phenanthrene method have injection molding, casting molds, and small products that are limited by production equipment to less than 20 inches, and casting is produced. The conventional polyurethane and polyfluorene are copolymers that are hardened into a Fresnel lens pattern at room temperature.

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Disadvantages such as demolding marks and not easy demolding. Another ^ ,,, and interval are too long, and the UV-curing glue was used to replace the reactive type = Neel lens manufacturing method. The production period and the mass production, but it is easy to manufacture: The yield rate of the produced philistine lens has a large shadow bubble. 'For the [Summary of the Invention] In view of the above problems, the manufacturing method of applying light-solid adhesive to the erotic lens by a gel method is to achieve the above purpose, the method of the present invention The method includes the following steps: placing a light Fresnel mold; a Fresnel mold for curing light by a rolling method; curing the light curing adhesive with a mold; and forming the light into a Fresnel lens. Xiafei provides a Fresnel lens manufacturing method. The square glue is applied in a partial glue method. An acrylic substrate is covered with a light-coated acrylic substrate and Fresnel cement and Fresnel mold. Separate

Compared with the conventional technology, the method for manufacturing a Fresnel lens according to the present invention is to apply a light-curing glue on a Fresnel mold by using a local glue method, which can effectively remove air bubbles generated during the manufacturing process, and improve The yield of Fresnel lenses can be very helpful. [Detailed description of the Chevrolet embodiment] The method of manufacturing a Fresnel lens according to an embodiment of the present invention will be described below with reference to related drawings, wherein the same components will be denoted by the same reference symbols

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Explain. -^ r,,,;: ί2:;: Γ) " I "; ^ :; Τ " ^ The plate 13 is covered with a light-fixed phenanthrene ear mold & ^^ base = irradiation / gram Force substrate 13 and Philip ear mold 12 to cure light-solid adhesive 11

(Husband 2: ^ s〇1, as shown in Fig. 2 'in the use-automatic sizing system H) The photo-curing glue 11 is applied on the surface of Philippine ^ 12 in a partial sizing manner. Before applying the photo-cursor u to the philanthropic mold 12, select 2 electric elimination to remove the static electricity and electrostatically adsorbed dust on the acrylic substrate 13 and the surface of the ear mold 12.

In one step SO1, the method of “partial gluing” can be divided into linear gluing (as shown in Japanese) and dot gluing (as shown in FIG. 2A). As shown in FIG. 2), μ-shaped (as shown in FIG. 2B), curved shapes (such as 2C), etc., which can reduce the amount of light curing glue and prevent air bubbles generated in the manufacturing process. In addition, the light-solid adhesive 11 used in this embodiment is an ultraviolet light (UV) adhesive, which can be fluorenyl methyl acrylate series and urethane series, such as Yongkuan chemical model ΕΑΑ288 acrylic Series I external light hardening resin ', and the light initiator used at the same time is Ciba E ~ 1 84 0 · 5 ~ 5%. The air bubbles generated during the process can also be reduced by the distance control between the lower glue nozzle 1 4 and the Philip's mold 1 2 'specifically' the lower glue nozzle 1 4 and the Fresnel mold丨 The distance between 2 is about 1 ~ 3

530000 V. Description of the invention (4) Within the range of cm. In addition, the viscosity of the light-solid adhesive 丨 丨 must be controlled between about 60 centipoise and 1500 centipoise (Cent, pise, Cp). In addition, 0.1 to 1% of a surfactant must be added, such as AEROSOL surfactants from Taiwan Cytec Technology to prevent the generation of air bubbles. As shown in FIG. 3, the acrylic substrate 13 used in step S02 is an optical acrylic substrate with a single-sided matte anti-glare treatment. In step s02, 'acrylic substrate 1 2 of 3 ~ 3 positions are slowly covered with the temple clothes shaft on the Philippine ear mold 12 coated with light solid glue Π, and simultaneously with the rolling roller (R〇 ller) 1 5 can be rolled to 'expand the light solid glue 丨 丨 in the horizontal direction effectively, and can effectively remove the air bubbles generated by the lower glue spray head 1 4. 4 and 5 are partial enlarged views of FIG. 3. In FIG. 4 and FIG. 5, the lines between the light-curing adhesive 11 and the Fresnel mold 2 can be clearly seen. Please refer to FIG. 4, after covering the acrylic substrate 丨 3, the acrylic substrate 1 3, the light-curing adhesive 11 and the Fresnel mold 丨 2 are sent to the lighting device together with a conveyor belt to irradiate light to cure the light-curing adhesive.丨 1, here, the light is an ultraviolet light. / ^ Please refer to FIG. 5 again, the acrylic substrate 1 3, the light-curing glue 11 and the Fresnel mold 12 after the ultraviolet light is irradiated, the Fresnel mold 2 and the light-curing glue 11 are separated by an automatic demolding system. To form a Fresnel lens 1. "The manufacturing method of the Fresnel lens of the present invention is to apply a light-solid adhesive to a Fresnel mold by using a local glue method. Due to the local glue method, it can effectively reduce air bubbles generated during the manufacturing process and increase Yield of the $ Neel lens produced. In addition, the resin used in the present invention is a light-curing adhesive. The resin can be cured by irradiating light, and the production period can be shortened.

530000 V. Description of the invention (5) and mass production. The above description is exemplary only, and not restrictive. Any equivalent modification or change made without departing from the spirit and scope of the present invention shall be included in the scope of the attached patent application.

Page 8 530000 Brief description of the drawings [Simplified description of the drawings] FIG. 1 is a block diagram illustrating the manufacturing method of the Fresnel lens of the present invention. Figures 2A to 2C are schematic diagrams illustrating the partial dispersing method of applying light-solid adhesive on a Ferre mold. Fig. 3 is a schematic view illustrating that an acrylic substrate is covered on a Fresnel mold. Fig. 4 is a partially enlarged schematic diagram of Fig. 3, illustrating the irradiation of light to cure the photo-curing adhesive. Fig. 5 is a schematic enlarged view of a part of Fig. 3, illustrating the separation of the light-solid adhesive and the Fresnel mold to form a Fresnel lens. · [Illustration of Symbols] 1 Fresnel Lenses 11 Light-Solid Glue 12 Fresnel Mould 13 Acrylic Base Plate 14 Lower Nozzle Nozzle 15 Roller

Claims (1)

530000 A patent-manufacturing method for a phenanthrene lens, including the following steps: · Applying a light-solid glue to a Fresnel in a partial glue method · Not: an s ear mold; a method of covering an acrylic substrate On the coated with light: glue i the solid glue; and = ray irradiates the acrylic substrate and the Fresnel mold to cure the light lens to separate the light solid glue from the Fresnel mold to form non-nephrine The ear 2 and the manufacturing method of the phenanthrene lens described in item 1 of the scope of patent application, the local glue method is a spot glue method. 3. As described in item 1 of the scope of patent application, Zhuang, Yue, and # @where the manufacturing method of Lefeijiang ear lens, the local glue method is the linear glue method. 4. As claimed: the method of patent scope, in which the meaning of M < non > 5 · As stated in Item 2 or Method 3 of the Patent Fanyuan, where the production of Fresnel lenses made by members is partially glued, the light-curing glue is in the shape of M. 530000 6. Scope of patent application 6 · The manufacturing method of the Fresnel lens as described in item 2 or 3 of the scope of patent application, in which the light-solid rubber is arc-shaped when partially applied. 7. The method for manufacturing a Fresnel lens according to item 1 of the scope of the patent application, wherein the light-curing adhesive is an ultraviolet light adhesive. Page 11