Patent ID: 7148945
Filing Date: 2006-12-12
Classification: G02F,H04N

Abstract:
1. An optical device, comprising: a plurality of optical modulator units, each having a liquid-crystal panel and a plurality of exit polarizer plates arranged to be heat insulated from the liquid-crystal panel; and a color-combining optical unit to combine parts of light modulated by the plurality of optical modulator units, the color combining optical unit having a plurality of incident surfaces; the plurality of exit polarizer plates of the plurality of optical modulator units each being separated in an optical axis direction, to have two exit polarizer plates including a first exit polarizer plate arranged at an incident side of each incident surface and a second exit polarizer plate arranged at an exit side of the liquid-crystal panel, the optical device further comprising for each incident surface of the color-combining optical unit: a first heat conductor plate, the color-combining optical unit bonded with the first heat conductor plate on each incident surface, and the first exit polarizer plate bonded on the first heat conductor plate and attached with a plurality of heat-insulation pins projecting toward the liquid-crystal panel; and on the plurality of heat-insulation pins, a polarizer-plate holding frame to hold a second heat conductor plate bonded with the second exit polarizer plate and a liquid-crystal panel holding frame holding the liquid-crystal panel are mutually fixed with a predetermined spacing.