Patent ID: 7030853
Filing Date: 2006-04-18
Classification: G06F

Abstract:
1. A method for detecting a RF signal of a liquid crystal display, by receiving a RF signal emitted from a pen input device and thus detecting a horizontal position and a vertical position when inputting by pen, the method comprising the steps of: receiving RF signals emitted from the pen input device through a plurality of gate lines and a plurality of source lines; a plurality of gate lines driven by the liquid crystal driving signal and at the same time receiving RF signals emitted from the pen input device; a plurality of source lines driven by the liquid crystal driving signal and at the same time receiving RF signals emitted from the pen input device; detecting RF signals corresponding to a horizontal position and a vertical position from the RF signals received through the plurality of source lines and the plurality of gate lines, respectively; and calculating the horizontal position and the vertical position from the detected RF signals.