Patent ID: 8508465

Claim:
A method for automatically adjusting backlight brightness on a mobile electronic device capable of operating in a DIM mode, an OFFICE mode and a BRIGHT mode, said device having a light sensor, an orientation sensor and a display, the method comprising: obtaining light level samples from said light sensor; determining orientation of said device; and in the event said backlight brightness is in one of either OFFICE mode or BRIGHT mode, and the median value of said samples is less than a first threshold value and said device is in a first orientation, then adjusting the backlight intensity of said display to said DIM mode, wherein the backlight intensity of said display in said DIM mode is less than said backlight intensity in said OFFICE mode, and the backlight intensity of said display in said OFFICE mode is less than said backlight intensity in said BRIGHT mode, in the event said backlight brightness is in one of either OFFICE mode or BRIGHT mode, and the median value of said samples is less than a first threshold value and said device is in another orientation then continuing operation in said OFFICE mode; in the event said backlight brightness is in DIM mode and the median value of said samples is greater than a second threshold value then adjusting the backlight intensity of said display to said OFFICE mode; in the event said backlight brightness is in BRIGHT mode and the median value of said samples is greater than said first threshold value and less than a third threshold value, then adjusting the backlight intensity of said display to said OFFICE mode; and in the event said backlight brightness is in one of either said DIM mode or said OFFICE mode and the median value of said samples is greater than a fourth threshold value, then adjusting the backlight intensity of said display to said BRIGHT mode.