发明名称 |
Automatic keypad backlight adjustment on a mobile handheld electronic device |
摘要 |
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. |
申请公布号 |
EP2224696(A1) |
申请公布日期 |
2010.09.01 |
申请号 |
EP20090171872 |
申请日期 |
2009.09.30 |
申请人 |
RESEARCH IN MOTION LIMITED |
发明人 |
BROGA, MATTHEW;CRUGNALE, THOMAS |
分类号 |
H04M1/22 |
主分类号 |
H04M1/22 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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