Patent ID: 7980716

Claim:
A front sheet located on a front side of a display panel in which pixels are arranged in a matrix pattern, comprising: a light guide which extends in a first direction of the display panel and has a convex cross section in a second direction of the display panel perpendicular to the first direction of the display panel, wherein: a plurality of the light guides are disposed in the second direction of the display panel; an apex of the light guide is a light-transmitting area and a light reflection area and a light-absorbing area are sequentially formed in the first direction of the display panel on the lateral inclined portion of the light guide; the light-absorbing area is disposed between neighboring ones of the light guides in a way to fill the space between them; the display panel's light intensity in distribution is diffused; and wherein part of light diffused from the display panel is reflected by the reflection area at least once and goes toward an image viewer and other part of the light is reflected by the reflection area 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 reflection area or goes directly toward a viewer.