发明名称 |
PORTABLE VISUAL DISPLAY DEVICE WITH A COLLAPSIBLE PRESENTATION SCREEN |
摘要 |
A collapsible rear projection screen assembly for a portable visual display device. Embodiments are presented comprising a flexible screen supported by a surrounding rigid screen that collapses by a simple folding movement for easy transport while also removing any risk of optical or physical damage to the screen member material in the collapsing process.
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申请公布号 |
CA2323010(C) |
申请公布日期 |
2005.05.17 |
申请号 |
CA19992323010 |
申请日期 |
1999.03.11 |
申请人 |
MADDOCK, ALAN |
发明人 |
MADDOCK, ALAN |
分类号 |
G03B21/58;G03B21/30;H04N5/74;(IPC1-7):H04N5/74 |
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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