发明授权
- 专利标题: Direct-lit backlight with angle-dependent birefringent diffuser
- 专利标题(中): 带角度的双折射扩散器的直射背光
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申请号: US11843178申请日: 2007-08-22
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公开(公告)号: US08007118B2公开(公告)日: 2011-08-30
- 发明人: Mark B. O'Neill , Carl A. Stover , Michael F. Weber
- 申请人: Mark B. O'Neill , Carl A. Stover , Michael F. Weber
- 申请人地址: US MN St. Paul
- 专利权人: 3M Innovative Properties Company
- 当前专利权人: 3M Innovative Properties Company
- 当前专利权人地址: US MN St. Paul
- 代理商 Robert S. Moshrefzaden
- 主分类号: G02B5/30
- IPC分类号: G02B5/30 ; F21V9/14
摘要:
A direct-lit backlight includes a diffuse reflector disposed in front of a light source. The diffuse reflector has a continuous phase material and a disperse phase material, at least one of which is birefringent, and the disperse phase material is formed into particles having a transverse dimension less than 1 micrometer for efficient visible light scattering. The continuous and disperse phases have refractive indices tailored so the diffuse reflector transmits light from the light source substantially more strongly for obliquely incident light than for normally incident light to provide bulb-hiding characteristics.
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