| 摘要 |
PURPOSE: A capacitance sensing circuit for multi-touch panel and a multi-touch sensor having the same are provided to sense a multi-touch operation which has excellent sensitivity about a noise. CONSTITUTION: A transmission circuit unit (210) is connected to a transmission line of a multi-touch panel. The transmission circuit unit applies a transmission signal of a square wave in the transmission line. A reception circuit unit (220) is connected to the reception line of the multi-touch panel. If a body contact of a user occurs, the reception circuit unit respectively integrates electric charges according to the ascending period and descending period of the transmission signal of the square wave which is applied from the transmission circuit unit. The reception circuit unit determines whether a touch occurs or not by detecting a capacitance difference which is generated between the transmission line and the reception line. |
