发明名称 |
Illumination system and display device |
摘要 |
An illumination system (32) is provided for producing output light having a variable angular illumination range for illuminating a display panel (31) in a display device (30). The illumination system (32) comprises first and second light sources (34 and 36) and is operable selectively in a first mode in which the output light comprises light derived from the first light source (34) with substantially no light derived from the second light source (36), and in a second mode in which the output light comprises light derived from at least the second light source (36). The output light derived from the first light source (34) has a first angular illumination range and the output light derived from the second light source (36) has a second angular illumination range wider than the first angular illumination range. The first mode can be used as a private mode and the second mode can be used as a public mode. The private mode can be used to prevent widespread reading of information or images displayed using the display device (30). |
申请公布号 |
GB2410116(A) |
申请公布日期 |
2005.07.20 |
申请号 |
GB20040001062 |
申请日期 |
2004.01.17 |
申请人 |
* SHARP KABUSHIKI KAISHA |
发明人 |
PAUL * BONNETT;GRANT * BOURHILL;ALLAN * EVANS;ADRIAN MARC SIMON * JACOBS;MARTIN DAVID * TILLIN;EMMA J * WALTON;ROBERT * WINLOW;JONATHAN * MATHER;NATHAN * SMITH |
分类号 |
F21V8/00;G02B6/00;G02F1/13357 |
主分类号 |
F21V8/00 |
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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