초록 ▼

The present invention relates to a capacitive touch sensor including a plurality of horizontal sensor bars arranged in a single direction. The touch sensor preferably receives differential sensor signals from the sensor array to reduce proximity effects and noise associated with conventional capacit

The present invention relates to a capacitive touch sensor including a plurality of horizontal sensor bars arranged in a single direction. The touch sensor preferably receives differential sensor signals from the sensor array to reduce proximity effects and noise associated with conventional capacitive touch sensors. The touch sensor also utilizes an isolation circuit or floating interface to reduce the effects of external interference and increase the accuracy of touch sensing and localization. The bars are preferably comprised of indium tin oxide oriented in the machine direction of roll for superior linearity. The touch sensor may be utilized with display screens having thick dielectrics and also eliminates the need for a rear guard layer.

대표청구항 ▼

A capacitive touch sensor for sensing a touch, comprising: a plurality of sensor bars configured in an arrangement wherein each bar is substantially parallel to a first axis and substantially perpendicular to a second axis; and a control circuit coupled to said plurality of sensor bars to provide an

A capacitive touch sensor for sensing a touch, comprising: a plurality of sensor bars configured in an arrangement wherein each bar is substantially parallel to a first axis and substantially perpendicular to a second axis; and a control circuit coupled to said plurality of sensor bars to provide an excitation signal to the plurality of sensor bars, receive a capacitive sense signal, and generate a position signal indicative of a position of the touch on the arrangement, the position signal indicating the position along the first axis and the position along the second axis, wherein the control circuit is coupled to a first side of the sensor bars via a set of N lines and to a second side of the sensor bars via a set of M lines, wherein N and M are not equal.