| 摘要 |
PROBLEM TO BE SOLVED: To equalize luminance of a backlight.SOLUTION: The liquid crystal display device includes a light source 20, a light guide plate 26 having a first edge 28 for receiving light from the light source 20, a light emitting surface 30, a bottom 32 for making the light coming from the first edge 28 reflected by the inside and go to the light emitting surface 30, and a second edge 42 on the opposite side to the first edge 28, a prism sheet 34 facing the light emitting surface 30 of the light guide plate 26, and a liquid crystal display panel 10 facing the prism sheet 34. The second edge 42 has a light reflecting preventing shape consisting of an irregular surface. The pitch P between a plurality of projections of the irregular surface is not longer than the wavelength of light. The ratio of the height H of the plurality of projections to the pitch P is one or more. |
