| 摘要 |
PURPOSE:To make more rays incident on the end face part of a light transmission plate by having a mechanism which collimates the light from a light source to parallel rays, changing the progressing direction of these rays by reflection and making the rays changed in direction to the non-parallel rays. CONSTITUTION:An electric bulb 7 is installed at the focal position of a convex lens 8 and these members are so arranged that the light from the light source is made parallel. The electric bulb is so installed that these rays are made incident on a light transmission body 9 having a prism part. A convex lens 10 is so arranged as to make the rays emitted from a light transmission plate 1 into the non-parallel rays between the light transmission body 9 and the light transmission body and the lens is so arranged as to make the rays incident from the center part of end face part of the light transmission plate 1. A color liquid crystal display which has high luminance and sufficiently withstands practicable use is obtd. when the back light is set in such display. The uneven display by temp. is not observed at the ray incident end of the light transmission plate 1. |
