Patent ID: 6417966
Filing Date: 2002-07-09
Classification: G03B

Abstract:
A light dispersing film for a rear projection screen, comprising:a first layer formed from a first material having a first refractive index, the first layer having first and second opposing sides and an optical axis normal to the first side, the first layer including structures formed from a second material having a second refractive index smaller than the first refractive index, the structures having bases at the second side with one or more side walls extending towards the first side, first internal reflecting surfaces being formed by interfaces between the first and second materials, the structure bases including a light absorbing material, optically transmitting areas of the second side being defined between the structure bases, the first internally reflecting surfaces forming reflecting units that asymmetrically disperse light through respective optically transmitting areas, the first reflecting surfaces forming surfaces disposed at at least two angles relative to the optical axis.