Head up display for a vehicle having a liquid crystal indicator and a reflecting prism
US5291184A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 7, 1992 |
| Grant date | Mar 1, 1994 |
| Priority date | — |
| Expiry date | Feb 7, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B2027/012
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
Display apparatus for a vehicle in which the quality of the display image of the indicator is enhanced and displayed content of the display image can be changed without restraint. The display apparatus for a vehicle consists of a indicator and a prism which are integral with each other. On a third surface of the prism where the prism is held in contact with the indicator is formed a transparent electrode. Along an edge portion of a second surface is printed a spacer and a cover grass is mounted thereon. On an inner surface of the cover glass is formed a dot-matrix-type transparent electrode. Further, between the surface and the cover glass is sealed a nematic liquid crystal to form a twisted nematic cell (TN). On the cover glass is further disposed a polarizing plate, a dispersion plate, and a backlight.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.