TOUCH PANEL CONTROLLER, TOUCH PANEL SYSTEM AND METHOD OF OPERATING TOUCH PANEL SYSTEM

摘要

A touch panel system in which power consumption is reduced, detection sensitivity is enhanced, a controller for the touch panel system, and a method of operating the system. Touch panel system includes status detecting portion having status signal generating portions generating a status signal indicative of a close status of an indicator, a position calculating portion processing the status signal, thereby calculating a position of the indicator on a detecting surface, and a region setting portion for updating an effective region set in the detecting surface P based on the position of the indicator which is calculated by the position calculating portion. A first operation causes the status signal generating portions SL and DL to selectively generate a status signal and a second operation causes the position calculating portion to selectively process the status signals generated by the status signal generating portions SL and DL.

主权项

1. A touch panel controller comprising:
a driving portion for driving a plurality of parallel drive lines provided along a detecting surface; a position calculating portion for processing a status signal generated on a plurality of parallel sense lines provided along the detecting surface and solid crossing the drive lines, thereby calculating a position of an indicator on the detecting surface; and a region setting portion for updating an effective region set in the detecting surface to set a new effective region based on the position of the indicator calculated by the position calculating portion, wherein the driving portion selectively drives the drive line passing through the effective region set currently, and the position calculating portion selectively processes the status signal generated on the sense line passing through the effective region set currently.