Viewfinder for video cameras
US5517278A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 11, 1992 |
| Grant date | May 14, 1996 |
| Priority date | — |
| Expiry date | Jun 11, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N23/53
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A viewfinder suited for use in a video camera, wherein rays of light emitted at a large solid angle from a minute light emitting area of a light emitting element are converted by a condenser lens into a bundle of generally parallel rays of light having a narrow directionality before they enter a liquid crystal display. The liquid crystal display modulates the rays of light emerging from the condenser lens according to a video signal to effect an image display. The displayed image is magnified by a magnifying lens. The liquid crystal display is of a type wherein an optical image is formed as a function of a change in state of light scattering and may be a polymer dispersed liquid crystal display, a liquid crystal panel utilizing a dynamic scattering mode, a ferro-electric liquid crystal panel using a scattering mode or a display panel utilizing PLZT.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.