JPS62112102A - Optical filter avoiding reflection - Google Patents

Abstract

PURPOSE:To improve the visibility of a picture by flocking non light-tran smittance flocks having 0.2-5mm length on the surface of the substrate except a part corresponding to a luminescent display part of a display screen, thereby depressing a shining of light coming from an outside such as a lighting, etc. CONSTITUTION:The non light-transmittance flocks having 0.2-5mm length are flocked on the surface of the substrate 2 except the part corresponding to the luminescent display part 4 of the display screen. If the filter material of the substrate has the prescribed optical characteristics and may coat an adhesives, said material is not specified. Said material comprises preferably a plastic material having the excellent optical properties in addition to a glass, such as a polyethylene terephthalate, an acrylic resin, a polyvinyl chloride. The method of coating the adhesives before carrying out the flock, comprises a doctor knife coater, a miyabar coater and a roll coater, etc. When the adhesives is directly coated on the part except the luminescent display part of the filter substrate, the screen printing method is preferable. Thus, the shining is remarkably depressed, and the visibility of the image is improved, and the fatique of the eye of an observer is reduced.

Description

[Detailed description of the invention]

3. Details of Zawo Akira? lll explanation Purpose of invention

[Industrial Application Field 1] The present invention relates to a pre-reflection 1F optical filter that prevents reflection and makes images on a display clear. [Conventional technology 1] With the progress of office automation in recent years, the number of businesses that use light-emitting displays such as CR King, such as in computers and word processors, has increased.1 These displays only have medium color displays. Instead, color displays are used to make images more impressive and display more information. In any case, for the purpose of improving visibility, the display has a contrast of 1 to 1.
There are many cases where the difference in brightness between bright and dark areas is increased. When an image smudges or becomes dizzy on a light-emitting display, negative IU is applied to the eyes of the measurer.Also, external light from lighting is reflected on the surface of the filter. ``Reflection,'' which makes the screen look harsh on children, is also a major problem.The conventional solution to this problem is to install a light-shielding area using black ink or black mud ink in areas other than the light-emitting display area. However, since the reflection on the coating surface is not extremely small, it may cause blurring, blurring, or blurring of the image.
It is not possible to completely eliminate the reflection of external light. For these reasons, there is a desire for a filter that makes light emitting displays easier to see and reduces eye strain on the viewer. [Problems to be Solved by the Invention] The purpose of the present invention is to meet the above-mentioned needs by providing a reflection method that prevents the reflection of external light and eliminates image blurring and blurring, thereby providing a clear image with high contrast. The purpose is to provide a prevention optical filter. Structure of the Invention [Means for Solving the Problems 1] To explain with reference to the drawings, the antireflection optical filter 1 of the present invention, as shown in FIGS. Base material 2 excluding the part corresponding to 4
A light-opaque flock 3 with a width of 0.2 to 5 m is placed on the surface of the
It is characterized by hair transplantation. The method of transplanting hair with no cock is 5, blow (=t
, vibration, or high-voltage static electricity. Among these methods, a method using high-voltage static electricity is most suitable in terms of the pils-raising effect and the strength of the flocked hair. In electrostatic flocking, an electrostatic field is created using a direct current voltage, and the fiber pieces are adsorbed onto a base material coated with an adhesive in advance using an attractive force, and a suitable direct current voltage is 10 to 30 kV. Depending on the method of supplying the flock, there are two methods: the down method, in which the flock is supplied from above the base material, and the up method, in which it is supplied from the bottom. The latter is preferable because the flock sticks vertically into the adhesive layer, resulting in a uniform and high density product, which provides a commercial product with a greater antireflection effect. The material of the filter serving as the base material may be any material as long as it has the required optical properties and can be coated with an adhesive. In addition to glass, plastics with excellent optical properties such as polyethylene terephthalate, acrylic resin, polyvinyl chloride, polycarbonate 1-1, borisdylene, and poly-4-methylpentene-1 are suitable. These materials can be formed into a filter by injection molding, extrusion molding, press molding, calendering, cast molding, or the like. The adhesive used for flocking can be either a solvent type or a water d-wave type (emulsion type), but an aqueous type is suitable in terms of workability and adhesive strength, and acrylic, vinyl acetate, synthetic It is best to use rubber-based ones with gills/υ. Even if flocking is applied, if the light-shielding properties are insufficient due to the low density of the flock, the adhesive may be colored black or the like to reduce reflection. Methods for forming the adhesive layer 15 prior to flocking include a doctor knife coater, a coater, and a roll coater.
However, when directly coating only the portion of the filter base material excluding the light emitting display portion with adhesive, screen printing is appropriate. The shape of the pixel, or in other words, the shape of the light-shielding material G3 is not arbitrary, and is typically circular 5 as shown in FIG. 1, but it may also be grid-like. Alternatively, the entire surface of the filter can be coated with adhesive, flocked, and then
It is also possible to remove the portion corresponding to the light-emitting display section by punching or the like. The flock to be used is suitably made of nylon or rayon, with a fineness of 1.5 to 3.0 d and a fiber length of 0.
5 to 2.0 # is most preferred. Furthermore, in order to improve the flight of flocs during electrostatic flocking, it is effective to treat with inorganic salts, surfactants, etc. As a method for reducing the reflection of the surface corresponding to the light emitting display section, it is effective to make the surface of the portion corresponding to the light emitting display section matte. Generally, micro silica, alumina, polyethylene fine powder, etc. are used as a matting material, or a matting method by sandblasting is used. When using a matting material, the matting material is uniformly dispersed in liquid plastic using a sand mill, ball mill, etc., and then coated on the filter base material by spraying, curtaining, rolling, dipping, etc. death,
Allow to dry and harden. This plastic material is required to have excellent scratch resistance, so we use trA-based materials with high hardness, such as silicone- or melamine-based thermosetting resins or acrylic-based ultraviolet or electron beam-curing resins. Good. As a way to reduce glare and reduce blurring of images so that they appear sharper, the light-transmitting parts are colored to absorb the transmitted light.
This is also effective for the present invention. In practice, the colorant may be kneaded into the filter material and dispersed throughout, or may be dispersed in another material and coated on the surface of the filter substrate, or the colorant may be mixed with the filter material and coated on the surface of the filter substrate. It may be dispersed together with a matting agent in the material forming the matting material. By combining light absorption in the light-transmitting portion and anti-reflection by the matte surface, and light blocking by the flock in the light-impermeable portion, an anti-reflection optical filter that further reduces the burden on the eyes can be obtained. [Function] The anti-reflection optical filter of the present invention, which has 1q of light-impermeable flock flocked to the part of the filter surface other than the part corresponding to the light-emitting part, can be installed in front of a light-emitting display to prevent lighting, etc. The "reflection" of external light is significantly reduced, and image visibility is improved. By providing a matte surface with appropriate roughness on the surface of the light-emitting portion, it is possible to reduce glare and reduce image blurring, and to more effectively prevent reflection of external light. (Example 11 A flocking adhesive was coated on a polyester film with a thickness of 100 μm to a thickness of about 20 to 25 μm by screen printing in the pattern shown in Figure 1. The composition of the adhesive was as follows. (“Parts” are parts by weight, the same applies hereinafter) “Hytran HW-311J (polyester urethane> 100 parts” Bontu 1-Crosslinker-CR-5LJ (epoxy crosslinking agent)
4 parts 1 - Boncoat Vj (acrylic thickener) 3 parts This film is flocked separately.
Black rayon flock fineness 3 by heshi-up method
The fibers were electrostatically flocked with a denier and a fiber length of 1.0 m. When the optical filter thus obtained was placed in front of a light-emitting display and observed, a clear image was obtained with little surface reflection. [Example 2] 5 parts of microsilica (particle size: 4 μm) was added to 100 parts of a polyester-melamine resin liquid with a solid content concentration of 40%, and dispersed in a sand mill for 1 hour. The following dye was dissolved in this to prepare a coating liquid for forming a matte layer. L Dia Resin Yellow C" (Mitsubishi Chemical> 0.10 part "Sumiplus 1 ~ Let L-I L 2 Bj (Sumitomo Chemical> 0.20 part "Macrolex")
Green G-1 (Bayer> 0.20 parts) Coat this liquid on one side of a 100μ thick polyester film using a bar coater, dry and harden it to a thickness of about 5μ.
A single layer of six colors of pine i was formed. The total light transmittance was about 49%, and the haze was about 15%. This film was coated with an adhesive and electrostatically flocked in the same manner as in Example 1 to produce an antireflection optical filter. When this filter was placed in front of a light-emitting display and observed, the emitted light color appeared to be a little pale, but visibility was good, and even when the brightness was increased, there was little glare and surface reflection was reduced. I was able to obtain clear images. Effects of the Invention When the anti-reflection optical filter of the present invention is used for ice play, "reflection" is significantly reduced, image visibility is improved, and asthenopia of the observer's eyes is reduced. Also,
Providing a matte surface 8 with an appropriate roughness on the surface of the light-emitting part effectively prevents glare from outside light.

[Brief explanation of drawings]

Drawing (1) showing an example of the anti-reflection optical filter of the present invention
Figure 1 is a partial plan view, and Figure 2 is an end view of the part I in Figure 1. 1... Anti-reflection optical filter 2... Adhesive material 3...)]] Ivy 4...Light-emitting display section Revision Applicant Nippon Printing Co., Ltd. Agent Patent attorney Souo Suga Go to Figure 1 1 9 ■ Figure 2

Claims (2)

[Claims] (1) Anti-reflection for displays characterized by flocking light-impermeable flocks with a length of 0.2 to 5 mm on the surface of the base material excluding the part corresponding to the light-emitting display part of the display screen. optical filter. (2) The antireflection optical filter according to claim 1, wherein the surface of the portion corresponding to the light emitting display portion is matte.