Patent ID: 6633349
Filing Date: 2003-10-14
Classification: G03B

Abstract:
A projection type liquid crystal display unit comprising:(a) a light source; (b) a converging lens which converges lights emitted from said light source; (c) a first polarizing plate which converts a light having passed said converging lens, into a linearly polarized light; (d) a liquid crystal light bulb which optically modulates said linearly polarized light in accordance with an image signal; (e) a second polarizing plate which extracts a light having an intensity varied in accordance with said image signal, out of said linearly polarized light leaving said liquid crystal light bulb; (f) a projection lens; and (g) a screen onto which said light leaving said second polarizing plate is projected through said projection lens, said liquid crystal light bulb including: (d1) a liquid crystal display panel; and (d2) 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, an incident light passing through said liquid crystal display panel and then said opening, said first surface being roughened.