Transmissive type display and method capable of utilizing ambien

Details Transmissive type display and method capable of utilizing ambien Transmissive type display and method capable of utilizing ambien

1995-05-15

1997-03-04

Healy, Brian

Optical waveguides

Noncyclindrical or nonplanar shaped waveguide

385 36, 385901, 362 31, 362 32, 349 62, G02B 610, G02F 11335

Patent

active

056088370

ABSTRACT:
Disclosed is a transmissive type display which uses ambient light for enhanced backlighting and which can be used with or without an artificial light source which is either built-in or external to the unit. The backlighting display assembly includes a light pipe with an arrangement of immediately adjacent microprisms serving as the back surface of the light pipe and a light injecting system. The backlighting system may also include a compensating plate or film which also has an immediately adjacent surface profile complementing that of the light pipe. The compensating plate, placed on top of the light pipe, is used to provide uniform illumination. Since outdoor ambient light provided by the sun usually comes from overhead, a light bending film may also be included in the backlighting system so that the display utilizes the overhead light effectively.

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