About KUBOTA HAJIME
About UCHIDA AKIRA
About OTANI YOSHIHIKO
About YAMAZAKI KEN
About 電気設備学会全国大会講演論文集
About light emitting diode
About advertising medium
About surface light source
About acrylic resin
About homogeneity
About emission characteristic
About light emitting diode
About billboard
About luminance distribution
About Light sources,lighting apparatus
About LED
About 電飾
About 看板
About 発光面
About 輝度分布