US Patent 7252426 Light guide device and backlight module using the same

A light guide device (1) and a backlight module (3) using the same. The light guide device includes a light guide plate (11) and a reflective mirror (10). The light guide plate has at least one light receiving surface (111), and two opposite light emitting surfaces (112,113). The reflective mirror is set between the light emitting surfaces, and is integrally manufactured with the light guide plate. The light guide device and backlight module using the same may be applied to optoelectronic devices, such as liquid crystal displays, overhead projectors, etc. The light guide device has a simple structure, and transforms light from at least one light source (31) into two surface light sources emitting light with uniform brightness.