Patent Number: 6,295,104

Title: Front illuminating system with layer between light guide and LCD

Abstract: In a transparent and spread illuminating apparatus 1, a light reflection pattern 7 consisting of the concave and convex is formed on the front surface 6 of a transparent substrate 2 so that the emission light is allowed to be uniformly irradiated on the face of the transparent substrate 2 regardless of a distance from a light source lamp 4, and the light is facially irradiated on a reflection type liquid crystal display element L. In addition, a transparent member 11 for changing the progressing direction of the light reflected from the transparent substrate 2 is disposed between the reflection type liquid crystal display element L and the transparent substrate 2 so as to be in close contact with both surfaces thereof. As a result, the degradation of the contrast which makes the observation of an image difficult and the generation of the moire pattern can be prevented.

Inventors: Egawa; Motoji (Shizuoka-ken, JP), Sato; Nobuhiro (Shizuoka-ken, JP), Suzuki; Shingo (Shizuoka-ken, JP)

Assignee: Minebea Co., Ltd.

International Classification: F21V 8/00 (20060101); G02F 001/133 (); F21V 008/00 ()

Expiration Date: 09/25/2018