发明名称 |
Liquid crystal light valve including between light and light valve microlenses and two reflecting layers with a matrix of openings |
摘要 |
A liquid-crystal light valve unit and a projection display system using same are provided. The liquid-crystal light valve includes a light valve having openings defining pixels in a matrix arrangement, first light-reflecting layer for reflecting light projected from a light source entering out of the openings of the light valve, a second light-reflecting layer, including openings in a matrix arrangement, located between the light source and the first light-reflecting layer, for directing the light reflected from the first light-reflecting layer toward the light valve while allowing the light from the light source to be propagated through the openings to the light valve, and a lens array including a plurality of positive lens elements in a matrix arrangement for directing the light from the light source to the second light-reflecting layer, a focal point of each of the positive lens elements being defined on a given area in the vicinity of each of the openings of the second light-reflecting layer. With this arrangement, an effective aperture ratio is increased for projection of bright images.
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申请公布号 |
US5430562(A) |
申请公布日期 |
1995.07.04 |
申请号 |
US19940185025 |
申请日期 |
1994.01.24 |
申请人 |
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. |
发明人 |
FUSHIMI, YOSHIMASA;MIYATAKE, YOSHITO |
分类号 |
G02F1/1335;H04N9/31;(IPC1-7):G02F1/133 |
主分类号 |
G02F1/1335 |
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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