Display unit
US5187597A · kind A · utility
129Cited by
3References
29Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 21, 1991 |
| Grant date | Feb 16, 1993 |
| Priority date | — |
| Expiry date | Jun 21, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03H2223/19
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A display unit including an indicator (1) for projecting a predetermined image, an image forming optical system (3) for forming a real image at a predetermined position according to the image projected by the indicator, and a transparent hologram screen (10) disposed at the image forming position of the image forming optical system to diffract the real image in a predetermined direction with a directivity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.