Noise-shield sheet and liquid crystal display device using the s

Details Noise-shield sheet and liquid crystal display device using the s Noise-shield sheet and liquid crystal display device using the s

1998-07-01

1999-11-23

Sikes, William L.

Liquid crystal cells, elements and systems

Particular structure

Particular illumination

349 62, 349110, 349152, 362 31, 361818, G02F 11335, G02F 11333, G02F 11345, H05K 900, F21V 1904

Patent

active

059909897

ABSTRACT:
There are provided a noise-shield sheet which can easily add a shield layer without complicating the wiring on a circuit board and which can prevent a short-circuiting between the shield layer and the electronic part's lead and connection terminals, and a liquid crystal display device using such a noise-shield sheet. The noise-shield sheet has holes each of which permits an electric component protruding from the surface of the circuit board to be passed through the hole and is mounted on the circuit board to avoid noise. The noise-shield sheet is made up of an insulating base layer and a shield layer of electrically conductive material formed on the insulating layer. Each of the holes has a first hole formed by etching the shield layer and a second hole formed by the insulating layer within the first hole at a position separate from the edge of the shield layer.

REFERENCES:
patent: 4661889 (1987-04-01), Fushimoto
patent: 4683519 (1987-07-01), Murakami
patent: 5164542 (1992-11-01), Hart
patent: 5264992 (1993-11-01), Hogdahl et al.
patent: 5265265 (1993-11-01), Hama et al.
patent: 5338897 (1994-08-01), Tsay et al.
patent: 5564096 (1996-10-01), Hama et al.
patent: 5731964 (1998-03-01), Kitakubo et al.
patent: 5774199 (1998-06-01), Ozawa

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