Patent ID: 7796213

Claim:
A liquid crystal display device comprising: a liquid crystal display panel; and a flat lighting device which radiates a light to the liquid crystal display panel, wherein the flat lighting device includes: a plurality of light emitting elements; a light guide plate having a side surface on which light from the light emitting elements is incident and which radiates light from the light emitting elements to the liquid crystal display panel; an upper surface of the light guide plate which is arranged to face the liquid crystal display panel in an opposed manner; a bottom surface of the light guide plate which is arranged to face the upper surface in an opposed manner; inclination surfaces which are formed on the bottom surface including a first inclination surface which is inclined at an angle with respect to the bottom surface in a direction toward the upper surface and away from the light emitting elements; a first light which is reflected on the inclination surfaces, and a second light which is radiated from the inclination surfaces, the first and second lights being radiated from the upper surface; a peak of an intensity of the light radiated from the upper surface is inclined in a direction away from the light emitting elements; and the angle of the first inclination surface with respect to the bottom surface at a position in a vicinity of the light emitting elements is greater than the angle of the first inclination surface at a position which is not in the vicinity of the light emitting elements.