发明名称 |
Overhead projector for flat panel display capability |
摘要 |
An overhead projector for use with a flat panel display assembly. The specialized overhead projector provides cooling for the LCD flat panel when used in an overhead projection configuration. The projector contains a rail on which the flat panel display is positioned for alignment and to provide air passage there through for cooling. A clamping mechanism is also described for securing the flat panel display to the projector. The flat panel display is a back-lit flat panel display subsystem for direct viewing as a monitor and also has overhead projection capability. The display subsystem contains a removable door assembly which provides for back-lighting for direct viewing. When the door assembly is removed, the active matrix LCD is semi-transparent and can be placed over the imaging screen of the overhead projector such that the LCD color image can be thus projected. The lamps that provide the back-lighting remain within the display subsystem when the door is removed and a unique optical coupling is provided between the lamps and a light pipe within the door. The display subsystem contains a sensor detecting door presence and simultaneously shuts off the lamps and reverses the display image upon door removal for overhead projection capability.
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申请公布号 |
US5593221(A) |
申请公布日期 |
1997.01.14 |
申请号 |
US19950495081 |
申请日期 |
1995.06.27 |
申请人 |
SILICON GRAPHICS, INC. |
发明人 |
EVANICKY, DANIEL E.;KEELY, LEROY B.;SIEFERT, STEVEN |
分类号 |
G03B21/132;(IPC1-7):G03B21/16 |
主分类号 |
G03B21/132 |
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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