Automatic keypad backlight adjustment on a mobile handheld electronic device
US8363015B2 · kind B2 · utility
1Cited by
3References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 30, 2009 |
| Grant date | Jan 29, 2013 |
| Priority date | — |
| Expiry date | Nov 3, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/0202
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method is set forth for automatically adjusting keypad brightness on a mobile electronic device having a light sensor, a keypad and a backlight for said keypad, comprising obtaining light level samples from the light sensor, turning the backlight from off to on in the event a current light level sample is less than a threshold value below which backlight illumination becomes necessary in order to read the keypad, and from off to on after a predetermined time period in the event the current light level sample is greater than the threshold value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.