Adaptive instrument display brightness control system
US5554912A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 15, 1995 |
| Grant date | Sep 10, 1996 |
| Priority date | — |
| Expiry date | May 15, 2015 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60K2360/349
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An adaptive instrument display brightness control system that automatically controls the instrument display brightness of a vehicle based on a vehicle operator's changes to the display brightness and particular ambient light conditions. An ambient light intensity sensor sends an ambient light intensity signal to a microprocessor which then selects a brightness look-up value from a look-up table based on the light intensity to illuminate the instrument display. If the vehicle operator adjusts the instrument display brightness, and the change to the brightness is within a learning range of the system, the microprocessor will set an adaptive timer to validate the change. After the timer has expired, the microprocessor will adjust the look-up value to a predetermined percent of the difference between the original look-up value and a new look-up value coinciding with the new illumination setting.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.