Patent ID: 8749506

Claim:
A noise cancellation circuit of a touch panel, the noise cancellation circuit comprising: at least one antenna for coupling noise of the touch panel and noise of a liquid crystal panel coupled to the touch panel; a multiplexer for receiving first X axis sensing signals and first Y axis sensing signals of the touch panel, wherein the first X axis sensing signals and the first Y axis sensing signals comprise the noise of the touch panel and the noise of the liquid crystal panel; and a readout circuit coupled to the multiplexer and said at least one antenna for utilizing the noise of the touch panel and the noise of the liquid crystal panel to cancel the noise of the touch panel and the noise of the liquid crystal panel in the first X axis sensing signals and the first Y axis sensing signals, and to generate and output second X axis sensing signals and second Y axis sensing signals not comprising the noise of the touch panel and the noise of the liquid crystal panel.