发明名称 |
SURFACE LIGHT SOURCE |
摘要 |
<p>A surface light source comprising a light emitting part (11) consisting of a single spot light source, and a light guide plate (12), wherein a reflection plane (13) is provided on the back side of the light guide plate and a prism pattern (15) is also provided. A directional light diffusion film (14) consisting of at least two light scattering/transmitting phases having different refractive indexes, where one phase having a larger refractive index includes a large number of regions having a columnar structure extending in the thickness direction of the film and the columnar structure is inclining against the normal direction of the film at an angle of 5-60˚, is arranged on the light exit surface side of the light guide plate (12) such that the scattering direction of the directional light diffusion film becomes the direction of uneven luminance. Unevenness of luminance becomes inconspicuous especially when it is observed from an oblique direction and highly efficient brighter irradiation of light is ensured in the front direction of a screen.</p> |
申请公布号 |
WO2005010432(A1) |
申请公布日期 |
2005.02.03 |
申请号 |
WO2004JP10123 |
申请日期 |
2004.07.15 |
申请人 |
CLARIANT INTERNATIONAL LTD.;HARADA, TAKAMASA;KITA, FUMIO |
发明人 |
HARADA, TAKAMASA;KITA, FUMIO |
分类号 |
G02F1/13357;F21V8/00;F21Y101/02;G02B5/02;G02B6/00;(IPC1-7):F21V8/00;G02F1/335 |
主分类号 |
G02F1/13357 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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