Patent ID: 8136950
Filing Date: 2012-03-20
Classification: H04N

Abstract:
1. An optical system unit in which light from a light source is shone on to a display device and rays of “on” state light, produced when the light shone on to the display device is reflected thereby, are projected while being enlarged by a projection side optical system, the optical system unit comprising: an image producing block in which the display device is disposed so as to reflect rays of “off” state light to an outside of a light entrance opening of the projection side optical system; an illumination side block which incorporates therein an integrator rod; and a projection side block which incorporates therein the projection side optical system, wherein the image producing block has a resin accommodation case and a metallic light absorbing plate which is disposed on an inner surface of the accommodation case, wherein a surface having heat-resisting properties and light-absorbing properties is formed on an inner surface of the light absorbing plate, wherein the accommodation case has a cooling opening in an upper surface thereof, wherein the image producing block is connected to at least the illumination side block and the projection side block, and wherein the light absorbing plate has two planes of an upper surface portion and a front surface portion, which are both formed into a flat plate shape, so as to be formed into an L-shape in section, the front surface portion including a through hole and being made to contact an inner surface of a portion of the accommodation case where the accommodation case connects to the projection side block, and the upper surface portion being made to internally contact an upper surface of the accommodation case.