| 摘要 |
PROBLEM TO BE SOLVED: To enable an even lighting over the whole LCD in a backlight illumination of an LCD display device or the like. SOLUTION: A transparent sheet with a plurality of independent convex light-collecting elements with transparency, and a lighting device irradiating diffused light from the back face of the transparent sheet are provided, of which, an alignment pitch of convex light-collecting elements at a part with high brightness of the back face of the transparent sheet is made longer, and that of convex light-collecting elements at a part with low brightness of the back face of the transparent sheet is made shorter. |
