BACK LIGHT UNIT AND IMAGE DISPLAY DEVICE USING THE SAME

摘要

According to one embodiment, an edge light-type back light unit includes, a light source, a light guide plate and a light quantity controller. The light source configured to exit light. The light guide plate includes a lens configured to prevent diffusion of the light exiting the light source and being incident onto a portion other than a portion corresponding to a vicinity of a boundary between the center portion and the periphery portion of the image display screen and a light diffuser of the light guide plate configured to diffuse light exiting the light source and being incident onto the portion corresponding to the vicinity of the border between the center portion and the periphery portion of the image display screen.

主权项

1. An edge light-type back light unit configured to cause exit light from a light source to be incident onto a back surface of a liquid crystal display panel via a light guide plate, the back light unit comprising:
a light quantity controller configured to set a quantity of light emitted to a portion of the liquid crystal display panel which corresponds to a center portion of an image display screen to be larger than a quantity of light emitted to a portion of the liquid crystal display panel which corresponds to a periphery portion of the image display screen; a lens of the light guide plate configured to prevent diffusion of the light exiting the light source and being incident onto a portion other than a portion corresponding to a vicinity of a boundary between the center portion and the periphery portion of the image display screen; and a light diffuser of the light guide plate configured to diffuse light exiting the light source and being incident onto the portion corresponding to the vicinity of the border between the center portion and the periphery portion of the image display screen.