Patent ID: 7791257

Claim:
A front sheet located on a front side of a display panel in which light-emitting pixels are arranged in a matrix pattern, comprising: a plurality of light guides which extend in the display panel's horizontal direction and has a convex cross section in the display panel's vertical direction, wherein each of the light guides are disposed in the display panel's vertical direction; and an apex of each light guide is a light-transmitting area and a light reflection layer and a light-absorbing layer are sequentially stacked on each light guide's area other than its light-transmitting area, wherein the display panel's light intensity distribution follows Lambert's law on distribution, and wherein part of light distributed according to Lambert's law is reflected by the light reflection layer at least once and goes toward an image viewer and other part of the light is reflected by the light reflection layer two or more times and once returns to the display panel and this light is again reflected by the display panel, and reflected by the light reflection layer or goes directly toward a viewer.