Backlighting device for liquid crystal devices

Details Backlighting device for liquid crystal devices Backlighting device for liquid crystal devices

1993-10-29

1994-10-18

Lazarus, Ira S.

Illumination

Revolving

362328, 362330, 362297, 362346, 359 49, F21V 800

Patent

active

053574052

ABSTRACT:
A backlighting device for producing a uniform luminance throughout a screen for use in LCD devices includes a semicylindrical concave surface on a light-transmitting top face of a light-guiding plate, lamps installed near two opposed edges of the light-guiding plate, a light-diffusing plate on the top side of the light-guiding plate, a light-reflecting plate attached to the bottom face of the light-guiding plate, and reflecting film patterns between the light-guiding plate and the reflecting plate. The present invention provides for a simpler manufacture of the backlighting devices producing a high and uniform luminance.

REFERENCES:
patent: 2965749 (1960-12-01), Hudson
patent: 4641925 (1987-02-01), Gasparaitis et al.

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