| 摘要 |
<p>PROBLEM TO BE SOLVED: To fetch accurate touched position data corresponding to a practical touched position without fetching touched position data including noise generated due to an output change from a liquid crystal driver. SOLUTION: When a 1st sampling clock CLK-S' inputted to a touch panel control circuit 14 coincides with an output changing timing clock CLK-D generating a noise by a liquid crystal driving signal outputted from a liquid crystal driver 16 in a state that touched position data applied from a touch panel 12 through an A/D converter 13 is fetched into a conversion data register 15 in accordance with a sampling clock CLK-S synchronous with the 1st sampling clock CLK-S', the touched position data from the panel 12 are fetched into the register 15 in accordance with a sampling clock CLK-S synchronous with a 2nd sampling clock CLK-S2 different from the 1st sampling clock CLK-S'.</p> |
