ELECTRONIC DEVICE INCLUDING DEVICE GROUND COUPLED FINGER COUPLING ELECTRODE AND ARRAY SHIELDING ELECTRODE AND RELATED METHODS
First Claim
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1. An electronic device comprising:
- a housing;
circuitry carried by said housing and having a device ground associated therewith;
an array of biometric finger sensing pixel electrodes;
an array shielding electrode outside said array of biometric finger sensing pixels;
a finger coupling electrode outside said array shielding electrode and coupled to the device ground; and
drive circuitry capable of generating a drive signal for said array of biometric finger sensing pixel electrodes and a compensating drive signal for said array shielding electrode.
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Abstract
An electronic device may include a housing and circuitry carried by the housing and having a device ground associated therewith. The electronic device may also include an array of biometric finger sensing pixel electrodes and an array shielding electrode outside the array of biometric finger sensing pixels. A finger coupling electrode may be outside the array shielding electrode and coupled to the device ground. The electronic device may also include drive circuitry capable of generating a drive signal for the array of biometric finger sensing pixel electrodes and a compensating drive signal for the array shielding electrode.
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Citations
28 Claims
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1. An electronic device comprising:
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a housing; circuitry carried by said housing and having a device ground associated therewith; an array of biometric finger sensing pixel electrodes; an array shielding electrode outside said array of biometric finger sensing pixels; a finger coupling electrode outside said array shielding electrode and coupled to the device ground; and drive circuitry capable of generating a drive signal for said array of biometric finger sensing pixel electrodes and a compensating drive signal for said array shielding electrode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A finger biometric sensor to be coupled to circuitry carried by a housing of an electronic device, the circuitry having a device ground associated therewith, the finger biometric sensor comprising:
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an array of biometric finger sensing pixel electrodes; an array shielding electrode outside said array of biometric finger sensing pixels; a finger coupling electrode outside said array shielding electrode and coupled to the device ground; and drive circuitry capable of generating a drive signal for said array of biometric finger sensing pixel electrodes and a compensating drive signal for said array shielding electrode. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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21. A method of making an electronic device comprising circuitry having a device ground associated therewith, the method comprising:
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forming an array shielding electrode outside an array of biometric finger sensing pixel electrodes; forming a finger coupling electrode outside the array shielding electrode and coupled to the device ground; and forming drive circuitry capable of generating a drive signal for the array of biometric finger sensing pixels and a compensating drive signal for the array shielding electrode. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28)
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Specification