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    • 9. 发明专利
    • Equipment using a light distribution control panel and this
    • JP3567819B2
    • 2004-09-22
    • JP29736699
    • 1999-10-19
    • 松下電工株式会社
    • 雄一 内田信行 朝日博司 福島
    • G02B5/02F21V3/04F21V5/02
    • Y02B20/72
    • PROBLEM TO BE SOLVED: To restrain variations in light distribution, and obtain a light distribution control panel which can efficiently direct light to a specific direction, by providing a light control means by means of minute forms at least on one face, and providing a second light control means by means of further minute forms on the at least one face of the light control means. SOLUTION: A light distribution control panel 2 is arranged on the side of a light source 1 surrounding the outer circumference of the light source 1. The light distribution control panel 2 formed into a plate shape or a sheet shape made of transparent material such as polymethylmethacrylate or polycarbonate or glass, and a light control means 3 by means of minute forms is provided on the face on the light source 1 side as the one face. This light control means 3 is provided with a second light control means by means of further minute forms. Concretely, minute prisms can be used for the light control means 3, and further minute prisms can be used for the second light control means 4. Further, the light distribution control panel 2 provided with the light control means 3 and the second light control means 4 can be obtained by molding or the like.