Head-up display system including a uniformly reflecting layer and a selectively reflecting layer
US5289315A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 23, 1992 |
| Grant date | Feb 22, 1994 |
| Priority date | — |
| Expiry date | Apr 23, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B2027/0194
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The present invention relates to a head-up display system which includes an element thereof. The element is attached to, for example, an automobile windshield so as to project light rays carrying images of display information onto the element from a luminous source in a car. The element includes first and second reflection layers. The first layer is directly attached to the windshield and has a relatively uniform reflectance throughout visible light spectrum. The second layer is directly formed on the first layer and has a selective reflection against incident visible light of wavelengths in the range from about 500 nm to about 600 nm. Thus, the light rays from the luminous source are displayed on the first and second layers in different colors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.