Color head-up display system
US5200844A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 22, 1992 |
| Grant date | Apr 6, 1993 |
| Priority date | — |
| Expiry date | May 22, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/133533
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A field sequential color head-up display system includes image generating means including a source of light of at least two different wavelengths. A color selective polarizing filter having first and second absorption axes, enables the passage of linearly polarized light of first and second colors. Optical retardation imposed by variable optical retarding means determines the color of the light transmitted by circular polarizing means. Image collimating means apply a generated image of selected colors to an image combiner placed in the line of sight between an observer and a scene, thereby superimposing a generated image over the scene visible to the observer. Holographic elements tuned to the selected wavelengths improve reflection of those wavelengths to the observer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.