Abstract:
A portable electronic device with an illuminated keyboard is disclosed. The device includes a plurality of user input keys arranged to form a keyboard; a reflective surface spaced apart from the keys; and a plurality of light emitters located between the keys and the reflective surface, the light emitters being configured to emit light towards the reflective surface for reflection towards the input keys.
Abstract:
A keypad with optical sensors is provided. The keypad comprises keycaps, each keycap having a top surface. One or more optical sensors are located beneath top surfaces of adjacent keycaps. One or more light guides extend from a respective optical sensor towards the top surfaces.
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 the 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.