Patent ID: 8952941
Filing Date: 2015-02-10
Classification: G06F

Abstract:
1. A method for driving a display device capable of sensing object presence, comprising: providing first signals to sensing circuits that detect a presence of an object, the sensing circuits including scan lines for receiving the first signals and sensors for sensing invisible light reflected from the object; providing second signals to an invisible light source array that provides invisible light to the sensing circuits, wherein the second signals selectively activate invisible light sources in the invisible light source array; synchronizing the timing of the first and second signals so that the invisible light is selectively provided to a portion of the sensing circuits receiving the first signals, and dividing the invisible light sources into p groups, and selectively activating the p groups with second signals according to which scan lines are receiving the first signals, wherein each of the p groups is activated for equal to or less than a duration A wherein the p groups include a first group and a second group and each of the p groups is divided into m subgroups, and wherein the m subgroups are simultaneously activated for equal to or less than a duration A