Patent ID: 7602449

Claim:
A projection type liquid crystal display unit comprising: (a) a light source; (b) a polarized beam splitter which separates S-polarized light out of a light emitted from said light source; (c) a liquid crystal light bulb which receives said S-polarized light and converts the thus received S-polarized light into a modulated light having polarization varying in accordance with an image signal, said light source, said polarized beam splitter and said liquid crystal light bulb being aligned along a light emitting axis, said modulated light being introduced again into said polarized beam splitter to extract a light having an intensity varying in accordance with an image signal, out of said modulated light; (d) a projection lens; and (e) a screen onto which said light leaving said polarized beam splitter is projected through said projection lens, said liquid crystal light bulb including: (c 1 ) a liquid crystal display panel; and (c 2 ) a frame which supports said liquid crystal display panel therewith, said frame being composed of resin and having a first surface formed with an opening through which said liquid crystal display panel is exposed, an incident light being reflected at said liquid crystal display panel being exposed through said opening, said first surface being roughened.