Surface lighting apparatus

Details Surface lighting apparatus Surface lighting apparatus

1989-08-04

1991-07-02

Lazarus, Ira S.

Illumination

Illuminated scale or dial

Edge illuminated modifier or light rod/pipe

362 31, 362245, 350345, G01D 1128

Patent

active

050290452

ABSTRACT:
A surface lighting apparatus for backlighting a liquid crystal display panel(LCD) (4) has a light guide (11) for evenly illuminating back face of the LCD, the light guide comprising: an incidence plane wherefrom light beams from light source come in; a front face disposed vertical to the incidence plane wherefrom the light beams are out; and a curved back face whereon light reflecting layer is formed for reflecting the light beams to the front face.

REFERENCES:
patent: 3040168 (1962-06-01), Stearns
patent: 3349234 (1967-10-01), Schwarz
patent: 3729626 (1973-04-01), Thurlow et al.
patent: 4460939 (1984-07-01), Murakami et al.
patent: 4487481 (1984-12-01), Suzawa
patent: 4630895 (1986-12-01), Abdala, Jr. et al.
patent: 4648690 (1987-03-01), Ohe
patent: 4714983 (1987-12-01), Lang
patent: 4729185 (1988-03-01), Baba
patent: 4933814 (1990-06-01), Sanai

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