Contact-free interaction with an electronic device
First Claim
1. An electronic device configured to detect contact-free interaction, comprising:
- a comparator;
a reference oscillator directly connected to the comparator and configured to generate a reference data signal having a reference frequency and output the reference data signal directly to the comparator;
a first antenna located at a first position of the electronic device, wherein the first antenna has a first antenna load having a reactance value based on inductive and capacitive elements of the first antenna, wherein the first antenna load varies in accordance with a location of an object within a sensitive region of the first antenna and a permittivity of the object;
a first measurement oscillator directly connected to the comparator and the first antenna, wherein the first measurement oscillator is configured to generate a first measurement data signal having a first measurement frequency corresponding to the first antenna load and output the first measurement data signal directly to the comparator, wherein the first antenna is tuned so that the first measurement frequency is substantially the same as the reference frequency when no object is within the sensitivity region of the first antenna and so that the first measurement frequency varies from the reference frequency by an amount that depends on the first antenna load; and
wherein the comparator receives the reference data signal directly from the reference oscillator and receives the first measurement data signal directly from the first measurement oscillator, wherein the comparator determines a difference between the reference frequency and the first measurement frequency, and outputs a first output data signal representing the determined difference which represents a distance of the object from the first antenna.
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Accused Products
Abstract
The present disclosure provides an electronic device configured to detect an object positioned at a distance. The electronic device includes a reference oscillator generating a reference signal having a reference frequency; and a first measurement oscillator coupled to a first antenna located at a first position of the electronic device. The first measurement oscillator generates a first measurement signal having a first measurement frequency corresponding to a distance of an object from the first antenna. The first antenna has a first antenna load corresponding to the distance of the object from the first antenna, and the first measurement frequency varies in dependence on the first antenna load. The electronic device also includes a comparator coupled to the reference oscillator and the first measurement oscillator which generates a comparator output including a difference between the reference frequency and the first measurement frequency which represents the distance of the object from the first antenna.
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Citations
22 Claims
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1. An electronic device configured to detect contact-free interaction, comprising:
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a comparator; a reference oscillator directly connected to the comparator and configured to generate a reference data signal having a reference frequency and output the reference data signal directly to the comparator; a first antenna located at a first position of the electronic device, wherein the first antenna has a first antenna load having a reactance value based on inductive and capacitive elements of the first antenna, wherein the first antenna load varies in accordance with a location of an object within a sensitive region of the first antenna and a permittivity of the object; a first measurement oscillator directly connected to the comparator and the first antenna, wherein the first measurement oscillator is configured to generate a first measurement data signal having a first measurement frequency corresponding to the first antenna load and output the first measurement data signal directly to the comparator, wherein the first antenna is tuned so that the first measurement frequency is substantially the same as the reference frequency when no object is within the sensitivity region of the first antenna and so that the first measurement frequency varies from the reference frequency by an amount that depends on the first antenna load; and wherein the comparator receives the reference data signal directly from the reference oscillator and receives the first measurement data signal directly from the first measurement oscillator, wherein the comparator determines a difference between the reference frequency and the first measurement frequency, and outputs a first output data signal representing the determined difference which represents a distance of the object from the first antenna. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. An electronic device, comprising:
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a filter; a reference oscillator directly connected to the filter and configured to generate a reference data signal having the reference frequency and output the reference data signal directly to the filter; a first antenna located at a first position of the electronic device, wherein the first antenna has a first antenna load having a reactance value based on inductive and capacitive elements of the first antenna, wherein the first antenna load varies in accordance with a location of an object within a sensitive region of the first antenna and a permittivity of the object within the sensitive region; a first measurement oscillator directly connected to the filter and the first antenna to generate a first measurement data signal having a first measurement frequency corresponding to the first antenna load and output the first measurement data signal directly to the filter, wherein the first antenna is tuned so that the first measurement frequency is substantially the same as a reference frequency when no object is within the sensitivity region of the first antenna and so that the first measurement frequency varies from the reference frequency by an amount that depends on the first antenna load; and wherein the filter receives the reference data signal directly from the reference oscillator and receives the first measurement data signal directly from the measurement oscillator, and outputs an output data signal representing a difference between the reference frequency and the first measurement frequency which represents a distance of the object from the first antenna. - View Dependent Claims (22)
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Specification