JPS6316534A - Crt filter - Google Patents

Abstract

PURPOSE:To improve design and prevent blurring of display at corners of a CRT face by forming a CRT filter in such a shape that it tightly makes contact with the CRT face and the bezel around the filter is integral with the filter. CONSTITUTION:A CRT filter 1 is formed in such a shape as to make tight contact with a CRT face, and a bezel 2 at the periphery of the filter is formed integral with the filter. For molding the CRT filter 1 and the bezel 2 integrally, injection molding, vacuum molding, compressed air molding, etc., can be selected depending on the molding material. The CRT filter 1 is to be used as it is assembled at the display part 4 of a monitor cover 3. Thus, as the CRT filter part 1 is composed in a shape to make tight contact with the CRT, its design is improved, and blurring of display at its corners can be prevented.

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a CRT filter.

(Prior technology) O of word processing sensor, personal combinator, etc.
CRT display devices such as A equipment and analytical equipment have become indispensable in offices, homes, and factories, which is contradictory. Along with this, the number of operators who come into close contact with CRTs for long periods of time is also increasing, and in developed countries, occupational diseases of operators are becoming a hot topic of social conflict. A common symptom of this occupational disease is optic nerve fatigue, and although the scientific cause and effect relationship has not been fully elucidated, consideration must be given to the risk of adverse effects from exposure to electromagnetic waves, static electricity, ultraviolet rays, etc.

In order to prevent such adverse effects, a CRT filter is usually attached to the CRT portion of a CRT display device.

(Problems to be Solved by the Invention) Since the commonly used CRT has a curved surface, when a flat CRT filter is attached, the display often appears blurred, especially in a part of the corner of the screen ( Therefore, the reality is that operators are inconvenienced by having to remove the CRT filter when working.

Furthermore, it is necessary to attach a special frame to the CRT filter so that it can be removed, and the CRT filter also becomes expensive.

The inventor of the present invention has completed the present invention after considering solutions to such difficulties.

(Means for Solving the Problems) That is, the CRT filter of the present invention has a shape that can be rotated around the CRT surface, and a bezel around the filter is integrated with the filter. be.

FIG. 1 shows an example of a CRT filter according to the present invention.

The CRT filter according to the present invention is used by being incorporated into the display 1 portion 4 of the monitor cover 3 as shown in FIG. 2, for example.

The material for the CRT filter according to the present invention may be any material that can integrally mold the bezel and the CRT filter, which has a shape that allows it to come into close contact with the CRT.
Examples include polyvinyl chloride resin, high nitrile resin, polyether ether ketone resin, polyether sulfone resin, polycarbonate, diethylene glycol bisallyl carbonate, polyethylene terephthalate, polymethyl methacrylate, acrylonitrile-styrene copolymer, etc., but especially adhesive properties High nitrile resin is preferred in terms of moldability.

In order to provide the function of a CRT filter, a sheet or film obtained from such a molded material is usually coated with t.
In order to provide a Mi wave shielding effect, metal nets made of copper, nickel, etc., impregnated with resin, or these metals, alloys, etc. are attached onto sheets or films by paint vapor deposition, sputtering, ion blating, VD, etc. It is advantageous to use laminated sheets of molded materials and sheets or films obtained from these molding materials.

Optionally, it is possible to use molding materials to which other additives such as UV absorbers, antistatic agents, dyes and pigments are added.

As a method for integrally molding the CRT filter 1 and the bezel 2, injection molding, vacuum molding, compressed air molding, etc. may be selected as appropriate depending on the molding material.

(Example) An aluminum mold was used as the sheet material for a thick layer of laminated polyvinyl chloride sheet and metal copper net impregnated with polyethylene terephthalate, and the bezel 2 and CRT filter 1 as shown in Figure 1 were integrated. combined CRT
The filter was air pressure molded.

Example 2 A high nitrile resin sheet (manufactured by Mitsui Toatsu Chemical Co., Ltd., product name:
Thickness ls+* of laminated metal copper net
A CRT in which the bezel 2 and the CRT filter 1 were integrally combined was prepared in the same manner as in Example 1 except that the sheet material was
Got the filter.

(Effect of the invention) C structured in a shape that allows it to come into close contact with the CRT
It has a part of the RT filter, so it has an excellent design.
Furthermore, it is possible to prevent a phenomenon in which the display blurs in a part of the corner of the screen.

+21 Since there is no need to remove the CRT filter, the operator can be freed from the risk of adverse effects caused by exposure to electromagnetic waves, etc. (3) The molding process is easy, so it can be finished at a low cost.

[Brief explanation of the drawing]

FIG. 1 shows an example of a CRT filter according to the present invention, where 1 indicates a part of the CRT filter and 2 indicates a bezel portion. FIG. 2 shows an example of the use of the CRT filter according to the present invention, in which numeral 3 indicates a part of a monitor cover and numeral 4 indicates a display section.

Claims (1)

[Claims] A CRT having a shape that can be closely attached to a CRT surface, and in which a bezel around the filter is integrated with the filter.
filter.