Patent ID: 7614777
Filing Date: 2009-11-10
Classification: G02B

Abstract:
1. A liquid crystal display device comprising: a liquid crystal display panel; and a backlight which radiates light to the liquid crystal display panel, wherein the backlight includes a first light source element and a second light source element, a light guide plate which allows incidence of light thereon from the first light source element and the second light source element, and a plurality of pyramids, each of the plurality of pyramids comprising a first inclined surface and a second inclined surface, wherein the first inclined surface is formed on the light guide plate and facing to the first light source element, and second inclined surface is formed on the light guide plate and facing to the second light source element, and wherein the first inclined surface and the second inclined surface are contacted with each other so as to form two sides of each pyramid, a tangent line of the first inclined surface to the light guide plate is orthogonal to the light from the first light source element, and a tangent line of the second inclined surface to the light guide plate is orthogonal to the light from the second light source element, and wherein a size of the first inclined surface and a size of the second inclined surface increase as a distance from the first light source element and the second source element increases.