Prismatic illuminator for flat panel display

Details Prismatic illuminator for flat panel display Prismatic illuminator for flat panel display

1989-06-08

1991-02-12

Lazarus, Ira S.

Illumination

Modifier mountable on light source envelope

362125, 362216, 362223, 362339, 362300, 362307, 362311, F21V 502

Patent

active

049929160

ABSTRACT:
An illuminator for a flat panel display utilizes at least one light source and at least one prism having total-internally-reflection at all but its front surface. Multiple images of the source(s) are provided over the front prism surface. A reflective coating can be used on at least one of the illuminator prism surfaces, so as to increase the total portion of the light from each source directed from an illuminator surface toward the display. The sources may be located within the prisms, or may be arranged colinearly with the elongated axis of each prism.

REFERENCES:
patent: 3761704 (1973-09-01), Takeichi et al.
patent: 4342071 (1982-07-01), Chamberlain
patent: 4404619 (1983-09-01), Ferguson
patent: 4425604 (1984-01-01), Imai et al.
patent: 4562517 (1985-12-01), Pankin
patent: 4641226 (1987-02-01), Kratz

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