US 12,445,129 B2 · Proximity detection method and circuit thereof

Abstract

The present application provides a proximity detection method and circuit thereof. The circuit includes a detection circuit, a baseline generating circuit, and a proximity sensing circuit. The proximity sensing circuit generates a proximity signal according to a detection data generated by the detection circuit, a baseline data generated by the baseline generating circuit and a proximity threshold, and judges whether the proximity signal is valid according to the detection data, a reference data, and a valid threshold. The validity of the proximity signal may be judged according to the reference data and the valid threshold and thus avoiding false judgement caused by the influences of the ambient factors.

Claims22

Dependent claims

A proximity detection method, applied to an electronic device, comprising:

detecting a capacitance of an electrode for generating a detection data by a detection circuit;
generating a baseline data according to said detection data by a baseline generating circuit receiving said detection data;
generating a proximity signal according to a proximity threshold and a difference value between said detection data and said baseline data by a proximity sensing circuit receiving said detection data and said baseline data, wherein said proximity signal represents the proximity of a human body or an object to said electronic device;
and
judging said proximity signal is valid or not to confirm that the proximity is occurred or not according to said detection data, a reference data, and a valid threshold by said proximity sensing circuit.

2 more elements

A proximity detection circuit applied to an electronic device, comprising:

a detection circuit, detecting a capacitance of an electrode for generating a detection data;
a baseline generating circuit, coupled to said detection circuit, and generating a baseline data according to said detection data;
and
a proximity sensing circuit, coupled to said detection circuit and said baseline generating circuit, generating a proximity signal according to a proximity threshold and a difference value between said detection data and said baseline data, wherein said proximity signal represents the proximity of a human body or an object to said electronic device;
and said proximity sensing circuit judging said proximity signal is valid or not to confirm that the proximity is occurred or not according to said detection data, a reference data, and a valid threshold.

2 more elements

Dependencies are inferred from the claim text.

Proximity detection method and circuit thereof

Life of this patent

Proximity detection method and circuit thereof

Life of this patent

Abstract

Claims22