Patent ID: 6778239
Filing Date: 2004-08-17
Classification: G02B,G02F

Abstract:
A light diffusing plate comprising:an unresolvable structure which has an optical refractive power and includes light transmitting spheres; individual passing areas through which a collimated light incident from a side of the unresolvable structure passes; a low-passing area other than said passing areas, which has relatively low light transmissivity compared with the passing areas, said passing areas and low-passing area being provided in a same plane; and a binder adhered to at least a circumferential portion of said spheres, said circumferential portion is part of a half of said spheres which faces said plane, wherein said individual passing areas respectively correspond to said light transmitting spheres and are separated by said low-passing area, such that portions of said passing areas and a portion of said low-passing area are disposed past said spheres in a passing direction of the collimated light, said low passing area being darker than said passing areas.