Invention Grant
US07768710B2 Optical film having luminous flux 失效
具有光通量的光学膜

Optical film having luminous flux
Abstract:
An optical film has symmetrical arrangement light-collecting units. The light-collecting units can be extended for several times. The light-collecting unit has apex angles and base angles with different degrees. Thus, a uniform luminous flux and a good light intensity are obtained for the optical film.
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