METHODS OF DETECTING MULTI-TOUCHES ON A TOUCH PANEL AND METHODS OF OPERATING A TOUCH SCREEN DEVICE USING THE SAME

摘要

PURPOSE: A multi-touch detecting method of a touch panel and an operation method of a touch screen device using the same are provided to distinguish a plurality of touches of a touch panel and to efficiently detect a touch input motion by variable touch strength of a user. CONSTITUTION: A noise is removed according to distribution of input touch levels of each point of a touch panel. A valid touch levels are determined(S100). Input touch levels are removed as a noise. Touch levels are maintained as the effective touch levels. A nearing touch is separated based on a two-dimensional pattern of the effective touch levels. One or more touch points are determined(S500).