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US 4,832,458 AGranted
Display for contrast enhancement
AssigneeTalig Corporation
InventorsJames L. Fergason, Robert Parker
Life of this patent
Estimating the term…
Abstract
A display comprising optical means for presenting an absence of light over a controlled viewing angle and means for selectively scattering or transmitting light in response to a prescribed input to effect a display of information within said viewing angle.
Claims12
A display for enhancing contrast and reducing glare, comprising:
- a target means for absorbing light;
- a concave reflector means for focusing light incident thereon including specular reflection onto said target means;
- and
- means selectively operable for affecting light incident thereon by selectively scattering or transmitting light in response to a prescribed input, said selectively operable means including first and second major surfaces having a concave configuration substantially the same as said concave reflector means, and said target means located in front of and on a viewing side of said selectively operable means.
1 more element
A display, comprising:
- a film of nematic curvilinearly aligned phases liquid crystal material having first and second surfaces, and selectively operable for affecting light incident thereon by transmitting light in response to a prescribed input, and at least one of scattering and absorbing light in the absence of said prescribed input;
- target means located in front of and on a viewing side of said film for absorbing light incident thereon;
- and
- reflector means disposed on a non-viewing said of said film, said reflector means having a concave surface and said film disposed along said surface so that said first and second surfaces and said reflector means present a concave surface to light incident thereon from the viewing side thereof for focusing light transmitted by said film within a viewing angle onto said target means to enhance the contrast of and reduce glare from the display.
1 more element
Dependencies are inferred from the claim text.