Patent ID: 8917260

Claim:
An optical touch panel, comprising: a plurality of light-sensing areas; and an image sensor controller configured to read signals from the light-sensing areas; wherein the plurality of light-sensing areas is integrally formed with pixels in a display panel or formed on the display panel, in order to sense incident light originating outside the optical touch panel, and wherein the image sensor controller is configured to: sense a change in an output from a specific light-sensing area between two time points; compare information on predicted light intensity of an image displayed on at least one pixel around a corresponding light-sensing area with information on light intensity actually measured in the corresponding light-sensing area; and determine that there is an optical input to the optical touch panel when the change in the output according to time is greater than or equal to a first reference value or when the measured light intensity is greater than the predicted light intensity of the image by a second reference value.