Patent ID: 8139045
Filing Date: 2012-03-20
Classification: G06F

Abstract:
1. A display device having a multi-touch recognition function, comprising: an integration module having a plurality of cameras integrated at an edge of a display panel; a processor that detects a touch area using at least first and second images captured by the plurality of cameras, respectively, and compensates the detected touch area with one of the plurality of compensation angles, the processor including: a memory that stores a plurality of compensation angles in a range of 0 to 90 degrees corresponding to each of the plurality of cameras; and an adder connected to the output terminal of the look-up-table, which adds the compensation angle from the memory to a measurement angle inclusive of the distortion amount caused by lens aberration, wherein the processor is operated in synchronization with a timing controller by a timing signal, wherein the compensation angles ‘θ error’ are defined by steps comprising: calculating an accurate measurement angle θ using θ=arc tan(A), wherein A is an actual touch area; calculating a mis-recognized measurement angle θ′ using the following equations: calculating the compensation angle using θerror=θ−θ′ wherein ‘c’ is a constant value, i.e., lens coefficient, representing a unique characteristic of lens having a value of 0<c≦1.