Capacitive sensing apparatus designs
First Claim
1. A capacitive sensing apparatus comprising:
- a plurality of electrically conductive sensing elements that have widths that vary and lengths that traverse a sensing region, said sensing elements comprising;
a first sensing element comprising a first variable-width portion and a second variable-width portion that in combination produce a combined first sensor signal;
a second sensing element comprising a third variable-width portion and a fourth variable-width portion that in combination produce a combined second sensor signal; and
a third sensing element comprising a fifth variable-width portion and a sixth variable-width portion that in combination produce a combined third sensor signal;
wherein said first, third and fifth variable-width portions are arranged in a first pattern and said second, fourth and sixth variable-width portions are arranged in a second pattern, wherein said first pattern and said second pattern are bilaterally symmetrical about a median that is substantially equidistant from opposite edges of said sensing region.
3 Assignments
0 Petitions
Accused Products
Abstract
A capacitive sensing apparatus includes a plurality of electrically conductive sensing elements that have widths that vary and lengths that traverse a sensing region. The sensing elements include a first sensing element including a first variable-width portion and a second variable-width portion that in combination produce a combined first sensor signal, a second sensing element including a third variable-width portion and a fourth variable-width portion that in combination produce a combined second sensor signal, and a third sensing element including a fifth variable-width portion and a sixth variable-width portion that in combination produce a combined third sensor signal. The first, third and fifth variable-width portions are arranged in a first pattern and the second, fourth and sixth variable-width portions are arranged in a second pattern, wherein the first pattern and the second pattern are bilaterally symmetrical about a median that is substantially equidistant from opposite edges of the sensing region.
-
Citations
20 Claims
-
1. A capacitive sensing apparatus comprising:
-
a plurality of electrically conductive sensing elements that have widths that vary and lengths that traverse a sensing region, said sensing elements comprising; a first sensing element comprising a first variable-width portion and a second variable-width portion that in combination produce a combined first sensor signal; a second sensing element comprising a third variable-width portion and a fourth variable-width portion that in combination produce a combined second sensor signal; and a third sensing element comprising a fifth variable-width portion and a sixth variable-width portion that in combination produce a combined third sensor signal; wherein said first, third and fifth variable-width portions are arranged in a first pattern and said second, fourth and sixth variable-width portions are arranged in a second pattern, wherein said first pattern and said second pattern are bilaterally symmetrical about a median that is substantially equidistant from opposite edges of said sensing region. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
-
10. A capacitive sensing method comprising:
-
receiving a first sensor signal output from a first sensing element of a plurality of electrically conductive sensing elements that have widths that vary and lengths that traverse a sensing region, said first sensing element comprising a first variable-width portion and a second variable-width portion that in combination produce said first sensor signal; receiving a second sensor signal output from a second sensing element of said plurality of electrically conductive sensing elements, said second sensing element comprising a third variable-width portion and a fourth variable-width portion that in combination produce said second sensor signal; receiving a third sensor signal output from a third sensing element of said plurality of electrically conductive sensing elements, said third sensing element comprising a fifth variable-width portion and a sixth variable-width portion that in combination produce said third sensor signal, wherein said first, third and fifth variable-width portions are arranged in a first pattern and said second, fourth and sixth variable-width portions are arranged in a second pattern, wherein said first pattern and said second pattern are bilaterally symmetrical about a median that is substantially equidistant from opposite edges of said sensing region; and determining an unambiguous position of an object proximate to said sensing region in a lengthwise dimension of said sensing region using said first, second and third sensor signals. - View Dependent Claims (11, 12, 13, 14)
-
-
15. A capacitive sensing system comprising:
-
a plurality of electrically conductive sensing elements that have widths that vary and lengths that traverse a sensing region, said sensing elements comprising; a first sensing element comprising a first variable-width portion and a second variable-width portion connected to a same first electrical conductor to produce a first sensor signal; a second sensing element comprising a third variable-width portion and a fourth variable-width portion connected to a same second electrical conductor to produce a second sensor signal; and a third sensing element comprising a fifth variable-width portion and a sixth variable-width portion connected to a same third electrical conductor to produce a third sensor signal; wherein said first, third and fifth variable-width portions are arranged in a first pattern and said second, fourth and sixth variable-width portions are arranged in a second pattern, wherein said first pattern and said second pattern are bilaterally symmetrical about a median that is substantially equidistant from opposite edges of said sensing region; and sensing circuitry coupled to said plurality of sensing elements, said sensing circuitry operable for receiving said first, second and third sensor signals. - View Dependent Claims (16, 17, 18, 19, 20)
-
Specification