Abstract:
A proximity sensor assembly including a light source, a first detector, and a first light focusing device. The light source is operative to emit light toward a first target area. The first detector is operative to detect light, including light emitted by the light source and reflected from the first target area. The first light focusing device is in a first optical path between the light source and the first detector. The first optical path includes an optical path from the light source and reflected from the first target area.
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.