Patent ID: 6412953
Filing Date: 2002-07-02
Classification: F21Y,G03B,Y10S

Abstract:
An illumination device, comprising:a light source, comprising an array of a plurality of light emitting devices; an illumination uniformizing means disposed in front of the light source to uniformize a light emitted from the light source, the illumination uniformizing means comprising: an incident plane, the light emitted from the light emitting device array is incident therefrom; a bottom plane, comprising a scattering pattern thereon; a projection plane opposite to the bottom plane, wherein: the light incident from the incident plane being scattered by the scattering pattern, while the light incident from the incident plane being totally reflected between positions of the bottom plane other than the scattering pattern and the projection plane; and a reflective side plane opposite to the incident plane, wherein the scattering pattern is gradually condensed from the incident plane towards the reflective side plane; and a polarization converter, disposed between the illumination uniformizing means and a light valve, to polarize the light from the illumination uniformizing means into a polarized light.