Back lighting device for a panel

Details Back lighting device for a panel Back lighting device for a panel

1991-02-14

1992-03-03

Dority, Carroll B.

Illumination

Revolving

F21V 704

Patent

active

050937650

ABSTRACT:
An improved backlighting device for liquid-crystal display panels comprising a linear light source the length of which is equal to or less than the length of an end portion of a light conducting plate at which light is admitted from the linear light source placed adjacent to it, the linear light source being enclosed with a light diffusing reflector that has a slit formed in the surface through which incident light is admitted into the light conducting plate and which is provided in such a way as to form a clearance from the surface of the linear light source, one major surface of the light conducting plate being partially covered with a light diffusing material under specified conditions that has a higher refractive index than the material of which the light conducting plate is made, the major surface being further covered with a specular or light diffusing/reflecting plate, with a plurality of light diffusing plates being provided on the other major (light emerging) surface of the light conducting plate.

REFERENCES:
patent: 2347665 (1944-05-01), Christensen et al.
patent: 4729068 (1988-03-01), Ohe
patent: 4985809 (1991-01-01), Matsui et al.

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