Patent ID: 7295263

Claim:
A liquid crystal display device comprising: a liquid crystal display panel which has a window-frame-like display region and a transmission region inside the window-frame-like display region; and a backlight which is disposed behind the liquid crystal display panel and illuminates the liquid crystal display panel, wherein the backlight includes a light guide plate which is arranged behind the liquid crystal display panel and a light source which is arranged close to at least one side periphery of the light guide plate, the light guide plate includes a light reflection treatment portion which directs light from the light source in the direction toward the liquid crystal display panel in an image display corresponding region excluding a transmission corresponding region which faces the transmission region of the liquid crystal display panel on a surface thereof opposite to a side on which the liquid crystal display panel is arranged, and the light reflectance of the light reflection treatment portion of the image display corresponding region which is arranged close to the transmission corresponding region of the light guide plate and the light reflectance of the reflection treatment portion of the image display corresponding region of regions of the light guide plate other than the transmission corresponding region are made different from each other.