发明名称 |
Transmission type projection screen |
摘要 |
A transmission type projection screen includes a diffusion layer on which projection light is focused, and a neutral gray layer positioned behind the diffusion layer on a rear side of the diffusion layer at which the projection light enters. The optical density of the neutral gray layer is in the range of 0.05 to 0.7.
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申请公布号 |
US6411436(B1) |
申请公布日期 |
2002.06.25 |
申请号 |
US20000627118 |
申请日期 |
2000.07.27 |
申请人 |
KIKUCHI SCIENCE LABORATORY INC. |
发明人 |
KIKUCHI TOJI |
分类号 |
G03B21/62;(IPC1-7):G03B21/56;G03B21/60 |
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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