METHOD AND DEVICE FOR CAPACITIVE SENSING
First Claim
1. A capacitive sensing device, comprising:
- a sensing unit detecting changes in charge coupling between a plurality of first conductive lines, a plurality of second conductive lines and a plurality of electrical conductors around or overlaying the intersections of the first conductive lines and the second conductive lines; and
a signal unit operatively driving an electrical signal to capacitively couple with the sensing unit through one of the first conductive lines, one of the second conductive lines and one of the electrical conductors.
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Accused Products
Abstract
This invention discloses a capacitive sensing device. The device includes a plurality of first conductive lines electrically isolated from each other; a plurality of second conductive lines electrically isolated from each other and electrically isolated from and stacked with the first conductive lines to form a plurality of intersecting points; and a plurality of electrical conductors electrically isolated from each other and correspondingly crossing the first and the second conductive lines and being around the intersecting points, wherein the first and second conductive lines and the electrical conductors are electrically isolated from each other. By doing so, when an electrical signal is driven to any first conductive line, the first conductive line is capacitively coupled to the second conductive lines with which it intersects, and the electrical conductors crossing the first conductive line are respectively capacitively coupled to the first conductive line and the second conductive lines which intersect with the first conductive line to provide a higher compound capacitance.
24 Citations
38 Claims
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1. A capacitive sensing device, comprising:
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a sensing unit detecting changes in charge coupling between a plurality of first conductive lines, a plurality of second conductive lines and a plurality of electrical conductors around or overlaying the intersections of the first conductive lines and the second conductive lines; and a signal unit operatively driving an electrical signal to capacitively couple with the sensing unit through one of the first conductive lines, one of the second conductive lines and one of the electrical conductors. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A capacitive sensing device, comprising:
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a plurality of conductive lines including a plurality of first conductive lines and a plurality of second conductive lines that are electrically isolated from each other and stacked on one another; a plurality of electrical conductors around or overlaying the intersections of the conductive lines; and a controller detecting the changes of mutual capacitances between the conductive lines and the electrical conductors. - View Dependent Claims (10, 11, 12, 13)
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14. A method for controlling capacitive sensing device, comprising:
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capacitively coupling each pair of intersecting conductive lines of a plurality of conductive lines by operatively driving one of the pair of intersecting conductive lines and sensing the other of the pair of intersecting conductive lines, wherein the intersection of each pair of intersecting conductive lines is around or overlaid by at least one electrical conductors separately; and detecting the changes of mutual capacitances between the conductive lines and electrical conductors. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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21. A capacitive sensing device, comprising:
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a signal unit for providing an electrical signal to a first conductive line; a first sensing unit for respectively receiving a plurality of first sensing signals from a plurality of second conductive lines before at least one of a plurality of electrical conductors capacitively or contact coupled with an object, wherein the second conductive lines are electrically isolated from each other; a second sensing unit for respectively receiving a plurality of second sensing signals from the second conductive lines when at least one of the electrical conductors capacitively or contact coupled with the object; and a calculation unit for calculating at least one touched location based on the first and second sensing signals, wherein the electrical conductors respectively position around and cross intersecting points of the first conductive line and the second conductive lines, the first and second sensing signals respectively include compound values of capacitive coupling between the first conductive line, the second conductive lines and the electrical conductors before and after coupling. - View Dependent Claims (22, 23, 24)
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25. A capacitive sensing method, comprising:
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providing an electrical signal to a first conductive line; receiving a plurality of first sensing signals from a plurality of second conductive lines before at least one of a plurality of electrical conductors capacitively or contact coupled with an object, wherein the second conductive lines are electrically isolated from each other; receiving a plurality of second sensing signals from the second conductive lines when at least one of the electrical conductors capacitively or contact coupled with the object; and calculating at least one touched location based on the first and second sensing signals, wherein the electrical conductors respectively position around and cross intersecting points of the first conductive line and the second conductive lines, the first and second sensing signals respectively include compound values of capacitive coupling between the first conductive line, the second conductive lines and the electrical conductors before and after coupling. - View Dependent Claims (26, 27, 28)
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29. A capacitive sensing device, comprising:
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a plurality of first conductive lines electrically isolated from each other; a plurality of second conductive lines electrically isolated from each other, wherein the first and second conductive lines are electrically isolated from and stacked on one another forming a plurality of intersecting points; a plurality of electrical conductors electrically isolated from each other, the electrical conductors respectively crossing the first and second conductive lines and positioning around the intersecting points, wherein the first and second conductive lines and the electrically conductors are electrically isolated from one another; a signal unit for providing an electrical signal; and a sensing unit for capacitively coupling with the signal unit through one of the first conductive lines, one of the second conductive lines and at least one of the electrical conductors, the at least one electrical conductor and the ones of first and second conductive lines being capacitively coupled, respectively, and wherein the one of the first conductive lines is driven by the electrical signal. - View Dependent Claims (30, 31, 32, 33, 34)
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35. A capacitive sensing device, comprising:
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a plurality of first conductive lines electrically isolated from each other; a plurality of second conductive lines electrically isolated from each other, wherein the first and second conductive lines are electrically isolated from and stacked on one another forming a plurality of intersecting points; and a plurality of electrical conductors electrically isolated from each other, the electrical conductors respectively crossing the first and second conductive lines and positioning around the intersecting points, wherein the first and second conductive lines and the electrically conductors are electrically isolated from one another; and a sensing unit, when a plurality of objects capactively or contact coupled with at least one of the first and second conductive lines and the electrical conductors, the sensing unit sensing a compound value of the capacitive couplings between the objects and the coupled first and second conductive lines and electrical conductors, providing a higher difference for identifying and eliminating ghost coordinates that are coupled with the objects.
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36. A capacitive sensing device comprising a plurality of first and second conductive lines forming a plurality of intersecting points and detecting at least one touched location based on mutual-capacitance of the intersecting points, wherein any two touched locations constitute a pair of diagonal real vertices on a virtual bounding parallelogram, the other pair of diagonal on the virtual bounding parallelogram being a pair of pseudo vertices, characterized in that the capacitive sensing device further comprising:
a plurality of electrical conductors crossing the intersecting points, the dimension of the electrical conductors determining signal differences between the intersecting points around the real vertices and those around the pseudo vertices. - View Dependent Claims (37, 38)
Specification