Self-masking transparency viewing apparatus
US6279253A · kind A · utility
12Cited by
48References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 28, 1999 |
| Grant date | Aug 28, 2001 |
| Priority date | — |
| Expiry date | Jan 28, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B27/024
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A viewing apparatus (11) for transparencies or the like masks any display areas (20) not covered by transparencies (505-508) by generating masks without moving parts, and adapts the luminance level of the image under study and of other display areas to the optimal viewing conditions required by the observer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.