| 摘要 |
PURPOSE: A touch screen and a compensation method for sensing capacitance variation and offset variation of the same are provided to increase the touch response speed by compensating for capacitance variation and offset variation. CONSTITUTION: A touch screen comprises: a touch panel where a plurality of driving lines and a plurality of sensing lines intersect and are wired; a driving unit for activating the driving lines sequentially; an input unit(20) for measuring a sensing capacitance formed in a sensing line corresponding to an activated driving line; a multiplexer(30) for serializing and outputting the measured sensing capacitance; an analog-to-digital converter(40) for sampling the sensing capacitance outputted from the multiplexer by reflecting an initial sensing capacitance as an offset and performing analog-to-digital conversion for the sampling result; and a host processor(60) for determining a touch event in response to the analog-to-digital conversion result. |
