Finger sensing device including differential measurement circuitry and related methods
First Claim
Patent Images
1. A finger sensing device comprising:
- an array of finger sensing pixels to receive a user'"'"'s finger adjacent thereto, each finger sensing pixel comprising a finger sensing electrode;
a finger drive electrode configured to cooperate with said array of finger sensing pixels to couple a drive signal through the user'"'"'s finger; and
differential pixel measurement circuitry coupled to said array of finger sensing pixels and configured to generate a plurality of interpixel difference measurements for adjacent pairs of said finger sensing pixels.
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Abstract
A finger sensing device may include an array of finger sensing pixels to receive a user'"'"'s finger adjacent thereto. Each finger sensing pixel may include a finger sensing electrode. The finger sensing device may include a finger drive electrode configured to couple a drive signal through the user'"'"'s finger to the array of finger sensing pixels. The finger sensing device may also include differential pixel measurement circuitry coupled to the array of finger sensing pixels and configured to generate a plurality of interpixel difference measurements for adjacent pairs of the finger sensing pixels.
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Citations
23 Claims
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1. A finger sensing device comprising:
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an array of finger sensing pixels to receive a user'"'"'s finger adjacent thereto, each finger sensing pixel comprising a finger sensing electrode; a finger drive electrode configured to cooperate with said array of finger sensing pixels to couple a drive signal through the user'"'"'s finger; and differential pixel measurement circuitry coupled to said array of finger sensing pixels and configured to generate a plurality of interpixel difference measurements for adjacent pairs of said finger sensing pixels. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A finger sensing device comprising:
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an array of finger sensing pixels to receive a user'"'"'s finger adjacent thereto, each finger sensing pixel comprising a finger sensing electrode; a finger drive electrode configured to cooperate with said array of finger sensing pixels to couple a drive signal through the user'"'"'s finger; balanced differential pixel measurement circuitry coupled to said array of finger sensing pixels and configured to generate a plurality of interpixel difference measurements for adjacent pairs of said finger sensing pixels; and a cover layer over said finger sensing pixels having a thickness in a range of 100-900 microns. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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17. A method of sensing a finger comprising:
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receiving a user'"'"'s finger adjacent an array of finger sensing pixels, each finger sensing pixel comprising a finger sensing electrode; cooperating with the array of finger sensing pixels to couple a drive signal through the user'"'"'s finger to the via a finger drive electrode; and generating a plurality of interpixel difference measurements for adjacent pairs of the finger sensing pixels using differential pixel measurement circuitry coupled to the array of finger sensing pixels. - View Dependent Claims (18, 19, 20, 21, 22, 23)
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Specification