Patent ID: 8174643
Filing Date: 2012-05-08
Classification: G02B,G02F

Abstract:
1. A light guide plate comprising: a side end face for receiving light from a light source; an incoming part which includes said side end face for guiding light input from said side end face; a principal surface formed in a direction substantially perpendicular to said side end face for letting a portion of light guided by said incoming part go out; and a main body part including said principal surface continuously coupled with said incoming part on the opposite side from said side end face, wherein, said incoming part is thicker on the side end face side than on said main body part, and has a bent light guide part for guiding a portion of the light coming in through said side end face outside the range of thickness of said main body part into the range of thickness of said main body part, said bent light guide part has an inclined front surface so that a surface in a direction substantially perpendicular to said side end face is continuous with said principal surface, and an inclined back surface inclined on the opposite side from said inclined front surface so as to be parallel to said inclined front surface, and said main body part is formed to be wider than the width of said side end face, said incoming part has a flat light guide part for guiding a portion of light coming in through said side end face within the range of thickness of said main body part into the range of thickness of said main body part, said flat light guide part is disposed within the range for facing said light source, said bent light guide part is disposed to spread in the width direction of said main body part.