CAPACITIVE TOUCH SENSOR AND CAPACITIVE PEN
First Claim
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1. A capacitive writing device, comprising:
- a capacitive pen including a conductive pen body and a conductive pen head in contact with the conductive pen body, and the conductive pen head including a contact portion and a non-contact portion, wherein the contact portion is softer than the non-contact portion, and the conductive pen head is made of bonded conductive fibers, some or all of which extend from the non-contact portion to the contact portion;
a touch sensor including a plurality of driven conductive strips provided with a driving signal and a plurality of sensed conductive strips providing changes in capacitive coupling, each time the driving signal being provided, one or more intersections between one or more of the driven conductive strips being simultaneously provided with the driving signal and each sensed conductive strip generating capacitive coupling; and
a control circuit for determining the location of the capacitive pen on the touch sensor based on the changes in capacitive coupling produced at the intersections when the capacitive pen is held on the touch sensor by an external conductive object.
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Abstract
When a touch sensor is approached or touched by a capacitive pen in a small area, the corresponding approach or touch signal might be slightly less than the threshold originally used for normal detection. By comparing the sum of the corresponding approach or touch signal and some adjacent signals with the threshold, the approach or touch of a small-area object that otherwise would not be detected by the original method can be determined. The capacitive pen can be made of bonded conductive fibers.
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8 Claims
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1. A capacitive writing device, comprising:
- a capacitive pen including a conductive pen body and a conductive pen head in contact with the conductive pen body, and the conductive pen head including a contact portion and a non-contact portion, wherein the contact portion is softer than the non-contact portion, and the conductive pen head is made of bonded conductive fibers, some or all of which extend from the non-contact portion to the contact portion;
a touch sensor including a plurality of driven conductive strips provided with a driving signal and a plurality of sensed conductive strips providing changes in capacitive coupling, each time the driving signal being provided, one or more intersections between one or more of the driven conductive strips being simultaneously provided with the driving signal and each sensed conductive strip generating capacitive coupling; and a control circuit for determining the location of the capacitive pen on the touch sensor based on the changes in capacitive coupling produced at the intersections when the capacitive pen is held on the touch sensor by an external conductive object. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
- a capacitive pen including a conductive pen body and a conductive pen head in contact with the conductive pen body, and the conductive pen head including a contact portion and a non-contact portion, wherein the contact portion is softer than the non-contact portion, and the conductive pen head is made of bonded conductive fibers, some or all of which extend from the non-contact portion to the contact portion;
Specification