Liquid crystal display projector with a lens shading device capable shading and positioning lens
US6190015A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 5, 1999 |
| Grant date | Feb 20, 2001 |
| Priority date | — |
| Expiry date | Aug 5, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B21/145
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The invention relates to a liquid crystal display projector with a lens protecting device capable of protecting and positioning lens of liquid crystal display projector. The lens protecting device of the invention comprises a cover, a top housing, a bottom housing, an actuating device, a plurality of springs and a mirror, where the lens is secured in the top housing and the actuating device also is connected to the top housing. Moreover, the mirror is located in the cover, and the top housing and the bottom housing are connected to each other by said springs. Further, the cover can be connected to the top housing or the projector with at least one hinge and projection of the projector is adjusted by only rotating the cover around the hinge. When the top housing is gradually covered by the cover, the actuating device will touch the top housing and deform these springs such that the top housing is located into the LCD projector and the lens is located in the protecting position. Therefore, When the LCD projector does not be operated, the lens is covered by the cover and disadvantages such as dirty and scare are properly protected. On the other hand, when the LCD projector is operatin…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.