发明名称 |
Multi-screen projector |
摘要 |
A multi-screen projector composed of a plurality of unit module projectors piled up one upon another in the vertical direction. Each unit module projector includes a Fresnel lens sheet, lenticular sheet, and prism sheet interposed therebetween such that a light is incident to the Fresnel lens sheet and outputted from the lenticular sheet. The prism angle of the prism sheet of the unit module projector disposed at a higher position is set larger than that disposed at a lower position, and the main output light from the prism sheet is made at least parallel with the incident light direction or deflected downward relative to the incident light direction.
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申请公布号 |
US4919518(A) |
申请公布日期 |
1990.04.24 |
申请号 |
US19890338208 |
申请日期 |
1989.04.14 |
申请人 |
HITACHI, LTD. |
发明人 |
OGINO, MASANORI;KAIWA, HIROSHI;IWAHARA, YOSHIAKI;TAMURA, YUZO;YAMAMOTO, AKIO |
分类号 |
G03B21/62;G09F9/00;H04N5/74;H04N9/31 |
主分类号 |
G03B21/62 |
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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