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single layer sensor structure

patent: 6062914

FIELD OF INVENTION 

The present invention relates to a capacitive touch panel technology, and particularly relates to a sense of control panels measuring point and its design method.

BACKGROUND OF INVENTION

   Depending on the working principle of the common touch panel can be divided into a resistive touch panel and a capacitive touch panel. When a user approaches or touches the surface of the capacitive touch panel with a finger or conductive object, the capacitance value of the capacitive touch panel corresponding to the change, with such changes in the capacitance value of the touch position can be sensing and computing. 

  Conventional two-dimensional capacitive sensing type touch panel is mainly arranged in the vertical direction by the horizontal direction two sensing pads sensing configuration, the two sensing pads staggered from each other in the portion of the insulating material to form two isolation capacitors. Two-dimensional type of capacitive sensing touch panel is a capacitive sensing touch panel technology mainstream, mainly due can detect multiple simultaneous touch points multi-touch and meet market demand.

   However, the conventional two-dimensional capacitive sensing type touch panel requires several steps to the process in the two sensing electrode pads to each other in a staggered both portions of insulating material to form a capacitor insulation, thus resulting in an increase in cost.

  Furthermore, conventional sensing techniques of two-dimensional capacitive sensing type touch panel is required by increasing the number of sensing pads and the reduction of the area of ​​the sensing pads to increase sensing resolution is reached, it will cause the drive circuit thus responsible sensed pin increases, which causes the hardware cost burden.