Three-dimensional image display device
US5506703A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 16, 1994 |
| Grant date | Apr 9, 1996 |
| Priority date | — |
| Expiry date | Feb 16, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03H1/22
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A three-dimensional image display device which comprises a holographic plate having a plurality of holograms divided in correspondence with rotational angles, the holographic plate being exposed so that when light is irradiated, each of the holograms forms a point image at a different position in a depth direction of the holographic plate; a drive unit for rotating the holographic plate; a light irradiating unit including a plurality of light sources arranged substantially in a straight line so that the light sources are kept at substantially equal distances from the holographic plate, for irradiating the holographic plate with light from the light sources; and a controller for controlling the drive unit and lighting operations of the plurality of light sources of the light irradiating unit in accordance with a signal indicative of a three-dimensional image to be displayed so as to control lighting of a plurality of point images formed in a three-dimensional space, whereby a three-dimensional image can be obtained with a simple configuration.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.