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    • 7. 发明授权
    • Light source and display system incorporating same
    • 光源与显示系统相结合
    • US08922733B2
    • 2014-12-30
    • US13502060
    • 2010-10-22
    • John A. WheatleyTao LiuEncai HaoWilliam Blake KolbMichael Benton Free
    • John A. WheatleyTao LiuEncai HaoWilliam Blake KolbMichael Benton Free
    • G02F1/1335F21V8/00
    • F21V13/14F21V9/14G02B6/005G02B6/0051G02B6/0096G02F1/133602
    • Light sources are disclosed. A disclosed light source includes an optically reflective cavity that includes an input port for receiving light and an output port for transmitting light, a lamp that is disposed at the input port, and an optical stack that is disposed at the output port. The optical stack includes a forward scattering optical diffuser that is disposed at the output port and has an optical haze that is not less than about 20%, and an optical film that is disposed on the optical diffuser. The optical film enhance total internal reflection at the interface between the optical film and the optical diffuser. The optical film has an index of refraction that is not greater than about 1.3 and an optical haze that is not greater than about 5%. The optical stack also includes a reflective polarizer layer that is disposed on the optical film. Substantial portions of each two neighboring major surfaces in the optical stack are in physical contact with each other.
    • 公开了光源。 所公开的光源包括光反射腔,其包括用于接收光的输入端口和用于传输光的输出端口,设置在输入端口处的灯以及设置在输出端口处的光学堆叠。 光学堆叠包括设置在输出端口并具有不小于约20%的光学雾度的前向散射光学漫射器,以及设置在光学漫射器上的光学膜。 光学膜增强了在光学膜和光学扩散器之间的界面处的全内反射。 光学膜的折射率不大于约1.3,光学雾度不大于约5%。 光学堆叠还包括设置在光学膜上的反射偏振器层。 光学堆叠中每两个相邻的主要表面的实质部分彼此物理接触。