Patent ID: 8184229

Claim:
A liquid crystal display device, comprising: a liquid crystal display panel; and a backlight arranged on a back surface of the liquid crystal display panel, the backlight including a plurality of rod-shaped light sources having a longitudinal axis extending in a horizontal direction, and which are arranged parallel to each other in a vertical direction on a back surface side of the liquid crystal display panel, wherein a frame which supports the rod-shaped light sources, a heat radiation plate which is arranged on a back surface side of the rod-shaped light sources, through holes are formed in the frame, and heat radiation fins are formed on the heat radiation plate in a state that the heat radiation fins project from a surface of the frame on a side opposite to the liquid crystal display panel through the through holes, the heat radiation fins are formed by cutting and raising a portion of, the heat radiation plate of planar shape, the heat radiation fins having a longitudinal axis extending in the vertical direction and a latitudinal axis extending in the horizontal direction, the heat radiation fins arranged parallel to each other along the longitudinal axis and in the vertical direction.