Automatic screen and keypad brightness adjustment on a mobile handheld electronic device
US7701434B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 31, 2005 |
| Grant date | Apr 20, 2010 |
| Priority date | — |
| Expiry date | Jan 31, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2219/038
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method is set forth for automatically adjusting screen and keypad brightness on a mobile electronic device having a light sensor, display screen and keypad, for optimum legibility under varying lighting conditions, with minimal eye strain and distraction to the user. The method includes obtaining light level samples from the light sensor, and independently adjusting backlight intensity of the display screen and keypad responsive to the light level samples. Preferably, correct screen and keypad adjustments are made responsive to the user pulling his or her handheld device out of its holster notwithstanding non-optimal ambient light detection while the device is being removed from the holster. According to another aspect, the described method allows for ambient light detection in a handheld device where the light sensor and a message notification indicator share a common light pipe.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.