Projecting-type display apparatus
US5506629A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 29, 1994 |
| Grant date | Apr 9, 1996 |
| Priority date | — |
| Expiry date | Jun 29, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/31
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Projecting-type display apparatus, wherein an image forming means frame is supported in such a manner as to be rotatable within a first plane perpendicular to an optical axis of a projection lens, and within a second plane including the optical axis and perpendicular to the first plane. A projecting-type display apparatus comprising means for changing the distance between an image forming means frame and a lens frame continuously or stepwise. A projecting-type display apparatus comprising means for changing the field angle of a projection unit having image forming means and projection lens with respect to a sreen cointinuously or stepwise.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.