Patent ID: 6369950
Filing Date: 2002-04-09
Classification: G02B,G02F,Y10S

Abstract:
A liquid-crystal display device comprising:a light pipe including an upper surface, a lower surface opposite to said upper surface, an incidence side surface and a light output means formed in said upper surface, said light pipe having a retardation of not larger than 40 nm between said upper and lower surfaces; a light source disposed on said incidence side surface; a reflection layer disposed on said lower surface; and a liquid-crystal shutter disposed on said upper surface and including a liquid-crystal cell and at least one polarizer, whereby light incident on said incidence side surface from said light source goes out from said lower surface through said light output means, the outgoing light is then reflected on said reflection layer, and the reflected light is then transmitted through said light pipe so as to go out from said upper surface finally.