发明名称 |
Transparent screen, projection display device, and method of receiving control signal light |
摘要 |
A transparent screen is constructed in such a way that a plurality of Fresnel prisms 12d each of which is smaller than a plurality of Fresnel prisms 12a and has a shape approximately similar to that of each of the plurality of Fresnel prisms 12a are arranged in a sawtooth shape on a non-light incidence surface portion of a Fresnel lens 12 on a light incidence side to which any image light PB applied from a projector 1 is not applied directly because blocked by a Fresnel prism 12a placed frontwardly.
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申请公布号 |
US8002482(B2) |
申请公布日期 |
2011.08.23 |
申请号 |
US20090419422 |
申请日期 |
2009.04.07 |
申请人 |
MITSUBISHI ELECTRIC CORPORATION |
发明人 |
ENDO TAKAO;NAKANO YUZO;TAKEUCHI HAYATO |
分类号 |
G03B21/10;G02B3/08;G02B27/44 |
主分类号 |
G03B21/10 |
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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