ILLUMINATOR, LIQUID CRYSTAL DISPLAY USING THE ILLUMINATOR AND ELECTRONIC DEVICE

摘要

Ridges (312) are formed on the surface of a light guide body (311) at regular intervals. Except the sides (312b-1, 312b-2) of the ridges (312), a total reflection layer (313) is formed. A light-emitting means (322) is disposed on one end surface of a light guide means (307), and most of the emitted light enters the interior of the light guide body (311) through a surface of incidence (315). The light from the light emitting means (322) is propagated through the light guide body (311) and goes out from the side surfaces (312b-2). The internal light (305) passes through an optical axis conversion means (321) and then enters an object (302) to be illuminated substantially perpendicularly. The external light (306) passes through the object (302) and then enters an illuminator (303). The light further passes through the optical axis conversion means (321) in the illuminator (303), and is then reflected from the total reflection layer (313). The reflected light passes the optical axis conversion means (321) again perpendicularly and then enters the object (302) perpendicularly. The light further passes through the object (302) to enable the object to be recognized. The light is reflected by the total reflection layer (313) without any loss. In addition, even when the external light (306) enters the illuminator at an angle other than a right angle, it is reflected by the total reflection layer (313) without any loss and enters the object (302).