发明名称 |
Portable visual display device with a collapsible presentation screen |
摘要 |
A colapsible rear projectrion screen assembly for a portable visual display device. Embodiments are presented that include a flexible screen supported by a surrounding rigid screen that collapses by a ssimple folding movement for easy transport while also removing any risk of opticql or physical damage to the screen member material in the collapsing process.
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申请公布号 |
US6466369(B1) |
申请公布日期 |
2002.10.15 |
申请号 |
US20000623455 |
申请日期 |
2000.12.26 |
申请人 |
MADDOCK ALAN |
发明人 |
MADDOCK ALAN |
分类号 |
G03B21/58;G03B21/30;H04N5/74;(IPC1-7):G03B21/56;G03B27/22 |
主分类号 |
G03B21/58 |
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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