| 发明名称 |
Variable fresnel screen for use in projection device |
| 摘要 |
A thin rear projection television using a wide angle lens system is provided. In an embodiment, a fresnel screen is used in which there are at least two spatial zones in the screen with different properties. The at least two zones may be adapted to compensate for the variation in input angle.
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| 申请公布号 |
US2004227990(A1) |
申请公布日期 |
2004.11.18 |
| 申请号 |
US20040753755 |
申请日期 |
2004.01.06 |
| 申请人 |
PETERSON MARK D.;GLAESS DAVID |
发明人 |
PETERSON MARK D.;GLAESS DAVID |
| 分类号 |
G02B13/16;G03B21/06;(IPC1-7):G03B21/60 |
主分类号 |
G02B13/16 |
| 代理机构 |
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