Variable-brightness display for use in a navigation system for a vehicle
US4965574A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 30, 1987 |
| Grant date | Oct 23, 1990 |
| Priority date | — |
| Expiry date | Oct 30, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G5/06
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A display device applied to a navigation system for a vehicle displaying map information by using a color pallet. The device comprises means for supplying at least a signal distinguishing a bright and a dark environment according to the degree of brightness degree in a passenger compartment of the vehicle. Color pallets have their contents changed according to the information from the supply means. The contents of the registers are changed so that a degree of brightness of background color of a display unit is decreased to less than a decreased degree of brightness of colors displaying the information on the display unit when the output information of the supply means changes from the brightness to the darkness.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.