JPS63197904A - Production of infrared radiation filter - Google Patents

Abstract

PURPOSE:To permit omission of laborious stages by printing a filter to one face in the required transparent part of a plastic nameplate. CONSTITUTION:This nameplate body 1 is a transparent plastic plate and is subjected to design printing 2 except a required IR radiation receiving part 3 which is made to remain transparent. The rear face of a transparent window 3 is subjected to a coloration treatment by a screen printing method using the ink prepd. by mixing blue, red and black dyes at 10g each with 100g transparent medium ink. An effect of capturing and transmitting about >=700nm IR rays is obtd. by this printing layer 6 and the transmittance is about 95%. The stage for preparing the nameplate for electronic equipment having the IR radiation receiving part is thereby improved and the production cost is reduced.

Description

[Detailed Description of the Invention] Remote control mechanisms using infrared rays are also applied to general household electronic equipment, such as infrared receivers for remote control of televisions, VTRs, audio, radio controls, microwave ovens, etc. t. The conventional method is to provide a required transparent window on a nameplate with function indications and aesthetic designs, and to attach a cut piece of a ready-made commercially available infrared filter to the back of the window. =, Two different processes, including printing by two masters and filter cutting and pasting, were essential steps. However, by marking the filter 91, S: The WR rule 21 idea that one of the above steps can be omitted brought about good luck.

This invention::1: This invention solves the above-mentioned problem.

To explain the drawings, FIG. 1 is a cross-sectional view of a conventional nameplate with an infrared filter attached thereto. The nameplate body (1) is a transparent plastic plate made of acrylic, polycarbonate, vinyl chloride, etc.
: Leave the required infrared receiving part (3) transparent and print the design (2!). From the back side of the transparent window (3), attach a cut piece (5) of a ready-made commercially available filter with adhesive (4). (The above filter is commercially available under the trade name Techranite Sonoike and is a standard product, so there are restrictions on color density and standard size.) In the 21st step, during the same process as above, the filter was pasted. Instead of printing, dye ink is printed at the required positions.This part will be explained using an example.
This ink is made by mixing 1 og each of blue, red, and black dyes with 100 g of transparent medium ink, and is colored using a screen printing method in a layer of about 5 μ to 10 μ. The effect of capturing and transmitting infrared rays was obtained. The transmittance is about 95%. Regarding the formulation of the above ink, by adjusting the color and amount of dye and the thickness of the printing layer.

Another feature is that it is possible to set infrared capture and transmission at any wavelength, from approximate to high wavelengths.

With the above configuration, the present invention can contribute to industrial effects because the process of manufacturing a nameplate for an electronic device having an infrared receiving section is significantly improved and the manufacturing cost is also reduced.

[Brief explanation of the drawing]

The figure is a conceptual cross-sectional view of a nameplate having an infrared light receiving section. 1) J & board body, (2j8 board! Takumi Printing Department, (3) transparent window, (4) adhesive, (5) ready-made filter piece, (6)
Filter color printing section. Patent Applicant Yokan Hyuga] Δ Procedural Amendment Form c) % Formula % 1. Indication of the case 1988 Patent Application No. 29425 2. Name of the invention Method for manufacturing an infrared filter 3. Person making the amendment Case and Relationship between patent applicant] 2) 4. Date of amendment order 'March 31, 1985 (shipment date April 26) 5. Column 6 for brief explanation of drawings in the statement of object of amendment As per the appendix, the following two lines are corrected as follows: Brief description of the drawings on page 3, line 14 of the amended specification. FIG. 1 is a sectional view of a nameplate to which an infrared filter is attached. FIG. 2 is a cross-sectional view of a nameplate on which an infrared filter is printed. that's all

Claims (1)

[Claims] Colored medium ink is coated or printed and dried on one side of the required transparent part of a transparent plastic nameplate with a design printed on it, and only infrared rays having a wavelength of approximately 700 nm or more are transmitted through this colored layer. A method of manufacturing an infrared filter for nameplates.