Patent ID: 8514179
Filing Date: 2013-08-20
Classification: H04B,H04M

Abstract:
1. A method for compensating for differential aging of a display screen on a handheld electronic device, wherein in a first position a first portion of the display screen is hidden from view while a second portion of the display screen is viewable, and in a second position the first portion and the second portion of the display screen are viewable, comprising: tracking over time relative illumination durations of the first and second portions; and based on the relative illumination durations, adjusting a relative degree of illumination of one or both of the first portion and the second portion when the display screen is in the second position to compensate for differential aging between the first and second portion; wherein the handheld electronic device includes a position sensor for detecting if the first portion of the display screen is hidden from view or is viewable, and wherein tracking over time the relative illumination durations is based on determining in dependence on information received from the position sensor if the first portion of the display screen is hidden from view or is viewable when the display screen is illuminated.