US Patent 7190425 Liquid crystal display module

A liquid crystal display module according to an embodiment of the present invention includes a lamp to generate light; a light guide panel to convert an incident light from the lamp into a surface light, having a first refractive index; a low refractive index layer fixed on the light guide panel, having a second refractive index, which is relatively lower than the first refractive index, so as to have the light incident to the light guide panel totally reflected on the border area with the light guide panel; and a reflective type of liquid crystal display panel to realize a picture by reflecting the light going out from the low refractive index layer.