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    • 2. 发明授权
    • Spread illuminating apparatus
    • 展示照明装置
    • US09010984B2
    • 2015-04-21
    • US13610098
    • 2012-09-11
    • Taku YamadaTomoko Ohara
    • Taku YamadaTomoko Ohara
    • G02B6/42F21V8/00
    • G02B6/0038G02B6/0036G02B6/0053G02B6/0055
    • An apparatus includes a two-sided prism sheet, and an optical path conversion unit with linear prisms. Each apex angle of the prisms increases the closer the linear prism is formed to the center in the light guide direction, and when a pair of inclined surfaces of each of the prisms has a first inclined surface and a second inclined surface, an inclination angle of the second inclined surface is larger than the one of the first inclined surface. Among the prisms, inclination angles e1 and e2 of a pair of inclined surfaces of a linear prism formed closest to the center and an inclination angle c of the first inclined surface and an inclination angle d of the second inclined surface of a linear prism formed closest to the side end surfaces at which the light sources are disposed satisfy a relationship 2×c
    • 一种装置包括双面棱镜片和具有线性棱镜的光路转换单元。 棱镜的每个顶角增加了在导光方向上形成的直线棱镜越靠近中心,并且当每个棱镜的一对倾斜表面具有第一倾斜表面和第二倾斜表面时,倾斜角度 所述第二倾斜面大于所述第一倾斜面的一个。 在棱镜中,形成为最靠近中心的线性棱镜的一对倾斜表面的倾斜角e1和e2以及第一倾斜表面的倾斜角c和直线形状的第二倾斜表面的倾斜角d最接近 到光源设置的侧端面满足2×c