Large screen display apparatus utilizing a transparent plate to

Details Large screen display apparatus utilizing a transparent plate to Large screen display apparatus utilizing a transparent plate to

1993-01-06

1993-11-23

Groody, James J.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358237, 358 60, 358238, 359460, 359457, H04N 574

Patent

active

052649415

ABSTRACT:
A large-size screen display apparatus, having a plurality of projection display devices arrayed in a matrix arrangement to form one large screen, is for displaying characters and the like. A screen of each projection display device consists of a transparent plate disposed on the light entrance side and a diffusing surface disposed on the viewing side. Further, and the periphery of the transparent plate is mounted to a housing of the display apparatus. Light rays emanated from a projection lens are reflected by the transparent plate, whereby an optical image is formed on the entire diffusing screen. Since the optical image is displayed on the entire surface of the diffusing screen, no non-display areas will appear on the screen even when the plurality of projection display device are arranged in the matrix array.

REFERENCES:
patent: 4364635 (1982-12-01), Stief
patent: 4804884 (1989-02-01), Vriens
patent: 4866530 (1989-09-01), Kalua
patent: 4875064 (1989-10-01), Umeda
patent: 4901155 (1990-02-01), Hara
patent: 5011277 (1991-04-01), Ogino
Proceedings of the 1989 (The Institute of Television Engineers of Japan) annual convention.

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