Projection display apparatus
US7551377B2 · kind B2 · utility
3Cited by
2References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 11, 2006 |
| Grant date | Jun 23, 2009 |
| Priority date | — |
| Expiry date | Jul 19, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B15/04
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The projection display apparatus includes rotation regulating elements for inhibiting a rotation of the mount ring in a tightening direction, and a stopper element displaceable between a non-locked position and a locked position, wherein the stopper element is displaced to the non-locked position when the mount ring is rotated to a rotating position in a loosening direction from a predetermined position in the tightening direction, and is displaced to the locked position when the mount ring is rotated to the predetermined position in the tightening direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.