Patent ID: 6561660
Filing Date: 2003-05-13
Classification: G01D

Abstract:
A light guiding device for a liquid crystal display that is a front light crystal display and includes a liquid crystal module having a plane formed on a top portion of the liquid crystal module, comprising a light guiding module including:a light guiding plate adapted to correspond to the plane of the liquid crystal module, the light guiding plate including a bottom adapted to face the plane of the liquid crystal module and a top opposite to the bottom of the light guiding plate; a plurality of light guiding grooves defined in the top of the light guiding plate, each light guiding groove being oriented at a same direction and arrange regularly, the light guiding grooves parallel to one another and each having a first surface and a second surface connected to each other in a bottom of each of the light guiding grooves to form an angle between the first surface and the second surface of each of the light guiding groove; a refracting portion laterally extending from a first side of the light guiding plate and having a cambered shape; a light guide bar separately installed and corresponding to refracting portion, the light guide bar having a first side facing the refracting portion and a second side opposite to the first side of the light guide bar, a light outlet surface formed on the first side of the light guide bar and having a cambered concave surface, a reflecting surface formed on the second side of the light guide bar and having a plurality of reflecting grooves defined in the reflecting surface of the light guide bar; a cambered reflecting mask separately installed and corresponding to the second side of the light guide bar; and two light source respectively disposed to correspond to a corresponding one of two opposite ends of the light guide bar.