发明名称 |
Shutter for display device of projection type |
摘要 |
A shutter has a cylindrical take-up member rotatable about the central shaft thereof, and a thin board having one end portion thereof fixed to the outer peripheral surface of the take-up member and deformable into a state rolled on the outer peripheral surface of the take-up member and having a spring force for returning to a flat state. The thin board is capable of operating between a liberating position in which in conformity with the rotated position of the take-up member, it is rolled onto the take-up member and retracts from a predetermined optical path to thereby permit the passage of light in the optical path and an intercepting position in which it is unrolled from the take-up member and assumes a flat shape and protrudes into the predetermined optical path to thereby intercept the light.
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申请公布号 |
US5690407(A) |
申请公布日期 |
1997.11.25 |
申请号 |
US19960654555 |
申请日期 |
1996.05.29 |
申请人 |
NIKON CORPORATION |
发明人 |
KIKUCHI, NOBUYUKI;OIKAWA, YOSHIRO;HATTORI, TETSUO |
分类号 |
G03B33/12;G03B9/28;G03B21/14;H04N9/31;(IPC1-7):G03B21/14 |
主分类号 |
G03B33/12 |
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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