Two-dimensional position sensor
First Claim
1. A sensor comprising:
- a sensing area;
a plurality of sensing cells arranged in the sensing area in a plurality of rows and columns, the sensing cells being configured to sense a position of an object within the sensing area, each of the sensing cells comprising a row-sensing electrode and a column-sensing electrode, the row-sensing electrode of each of one or more of the sensing cells being continuous with respect to the row-sensing electrode of each of one or more of the sensing cells adjacent to it in its row, the column-sensing electrode of each of one or more of the sensing cells being continuous with respect to the column-sensing electrode of each of one or more of the sensing cells adjacent to it in its column; and
a column wrap-around connection coupling a portion of the column-sensing electrode located at opposing ends of the columns of the sensing cells, the column wrap-around connection provided along a periphery of the sensing area.
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Accused Products
Abstract
A capacitive position sensor for determining the position of an object along first and second directions is described. The sensor comprises a substrate having an arrangement of electrodes mounted on a single surface thereof. The electrodes are arranged so as to define an array of sensing cells arranged in columns and rows to form a sensing area. Each of the sensing cell including a column sensing electrode and a row sensing electrode with the column sensing electrodes of sensing cells in the same column being electrically coupled together and the row sensing electrodes of sensing cells in the same row also being electrically coupled together. Row sensing electrodes of sensing cells at opposing ends of at least one of the rows are connected together by an electrical connection made outside of the sensing area so that there is no requirement for electrical connections to cross within the sensing area, thus providing a capacitive position sensor having a sensing area with electrodes on only one side of a substrate.
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Citations
21 Claims
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1. A sensor comprising:
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a sensing area; a plurality of sensing cells arranged in the sensing area in a plurality of rows and columns, the sensing cells being configured to sense a position of an object within the sensing area, each of the sensing cells comprising a row-sensing electrode and a column-sensing electrode, the row-sensing electrode of each of one or more of the sensing cells being continuous with respect to the row-sensing electrode of each of one or more of the sensing cells adjacent to it in its row, the column-sensing electrode of each of one or more of the sensing cells being continuous with respect to the column-sensing electrode of each of one or more of the sensing cells adjacent to it in its column; and a column wrap-around connection coupling a portion of the column-sensing electrode located at opposing ends of the columns of the sensing cells, the column wrap-around connection provided along a periphery of the sensing area. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method comprising:
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sensing a position of an object within a sensing area, the sensing area comprising a plurality of sensing cells arranged in a plurality of rows and columns, the sensing cells being configured to sense a position of an object within the sensing area, each of the sensing cells comprising a row-sensing electrode and a column-sensing electrode, the row-sensing electrode of each of one or more of the sensing cells being continuous with respect to the row-sensing electrode of each of one or more of the sensing cells adjacent to it in its row, the column-sensing electrode of each of one or more of the sensing cells being continuous with respect to the column-sensing electrode of each of one or more of the sensing cells adjacent to it in its column, a column wrap-around connection coupling a portion of the column-sensing electrode located at opposing ends of the columns, the column wrap-around connection provided along a periphery of the sensing area; and communicating a plurality of signals resulting from a capacitance sensed by the row-sensing and column-sensing electrodes and-indicative of the position of the object within the sensing area. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A computer-readable non-transitory storage media embodying logic that is operable when executed to:
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sense a position of an object within a sensing area, the sensing area comprising a plurality of sensing cells arranged in a plurality of rows and a plurality of columns, the sensing cells being configured to sense a position of an object within the sensing area, each of the sensing cells comprising a row-sensing electrode and a column-sensing electrode, the row-sensing electrode of each of one or more of the sensing cells being continuous with respect to the row-sensing electrode of each of one or more of the sensing cells adjacent to it in its row, the column-sensing electrode of each of one or more of the sensing cells being continuous with respect to the column-sensing electrode of each of one or more of the sensing cells adjacent to it in its column, a column wrap-around connection coupling a portion of the column-sensing electrode located at opposing ends of the columns, the column wrap-around connection provided along a periphery of the sensing area; and communicate a plurality of signals resulting from a capacitance sensed by the row-sensing and column-sensing electrodes indicative of the position of the object within the sensing area. - View Dependent Claims (16, 17, 18, 19, 20, 21)
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Specification