A mobile device has a proximity sensor. A compensation value of the proximity sensor is determined. The compensation value is compared to a reference compensation value to determine validity of the compensation value. A capacitance of the proximity sensor is measured. A value of the capacitance of the proximity sensor is adjusted based on the compensation value. A coefficient defining a relationship between a capacitance of the proximity sensor and a temperature of the mobile device is calculated. A temperature sensor is coupled to the proximity sensor. The temperature of the mobile device is measured. A value of the capacitance of the proximity sensor is adjusted based on the coefficient and the temperature of the mobile device. The adjusted capacitance value is compared to a threshold capacitance value to determine proximity of an object to the mobile device. A radio frequency signal is adjusted by detecting proximity.

Provided are a detection circuit of a bridge sensor, a chip and a detection system. The detection circuit includes: an alternating current excitation module, and further includes a signal conditioning module, an analog-to-digital conversion module and a processing module connected in sequence. The alternating current excitation module is configured to apply an alternating current excitation signal to the bridge sensor. The signal conditioning module and the analog-to-digital conversion module are configured to sequentially process an output signal of the bridge sensor. The processing module is configured to demodulate the processed output signal and obtain detection information of the bridge sensor according to the demodulated output signal. In embodiments of the present disclosure, a white noise of the system can be greatly suppressed, and a signal-to-noise ratio of the system is improved, thereby improving detection performance of the bridge sensor.

An optical proximity sensor with a digital calibration circuit and a digital calibration method are provided. In a test mode, a test light emitted by a light transmitter is reflected by a cover of an electronic device to form a first reflected analog signal to a light receiver. A digital calibration circuit counts the first number of pulse waves of a first reflected digital signal. In a calibration mode, a light is emitted to a detected object through the cover and then is reflected by the detected object to form a second reflected analog signal to the light receiver. When the digital calibration circuit counts the number of pulse waves of a second reflected digital signal up to the first number, the digital calibration circuit clears the first number and then recounts the number of pulse waves of the second reflected digital signal to obtain the second number.

A heater device includes a contact determination unit for determining contact or non-contact of an object based on a change in capacitance between a plurality of electrodes. The contact determination unit is configured to determine (i) the contact of the object in response to a determination that the change in capacitance between the plurality of electrodes per predetermined unit time is a change in one direction and equal to or larger than a first determination threshold value. The contact determination unit is configured to determine (ii) the non-contact of the object in response to a determination that the change in capacitance between the plurality of electrodes per predetermined unit time is a change in a direction opposite to the one direction and equal to or larger than a second determination threshold value.

Various exemplary embodiments are directed to methods including obtaining an input sample magnitude, filtering the obtained input sample magnitude, generating a sample-to-sample difference based on the filtered input sample magnitude, and engaging an actuator in accordance with a determination that the sample-to-sample difference satisfies a rate threshold. In addition, various exemplary embodiments are directed to devices including a processor, a control sensor operatively coupled to the processor and operable to obtain an input sample magnitude, an input filter operatively coupled to the processor and operable to filter the at least one obtained input magnitude sample, a non-transitory computer-readable medium operatively coupled to the processor and including a rate engine operable to generate a sample-to-sample difference based on the filtered input sample magnitude, and to generate a determination that the sample-to-sample difference satisfies a rate threshold, and a control actuator operatively coupled to the processor and operable to engage an operation mechanism in accordance with the determination that the sample-to-sample difference satisfies a rate threshold.

A method for detecting the approach and/or contact of a user's hand close to a motor vehicle door handle. The handle including: an electrode having a capacitance, and a device for measuring the variation in capacitance, a low-frequency antenna situated close to the electrode, the emissions of the low-frequency antenna bringing about disturbances in the operation of the device for measuring the variation in the capacitance. The method proposes that a new adaptive approach detection threshold be calculated, depending on an average of the previous measured variations in the capacitance, calculated over a predetermined time interval, the measured variations being weighted by a factor depending on a difference between each measured variation and the average of the variations calculated previously over a previous predetermined time interval, the approach detection being confirmed if the measured variation is higher than the new adaptive threshold.

An input apparatus includes a detection unit that repeatedly generates a detection signal according to a degree of proximity of the object, a drift simulation unit that generates a drift simulated signal that undergoes a change having correlation with a drift in the detection signal due to repeated generation of the detection signal in the detection unit, and a correction unit that corrects the detection signal according to the change in the drift simulated signal at least one of when repeated generation of the detection signal in the detection unit is started and when an interval for repeatedly generating the detection signal in the detection unit is changed.

A mobile device has a proximity sensor. A compensation value of the proximity sensor is determined. The compensation value is compared to a reference compensation value to determine validity of the compensation value. A capacitance of the proximity sensor is measured. A value of the capacitance of the proximity sensor is adjusted based on the compensation value. A coefficient defining a relationship between a capacitance of the proximity sensor and a temperature of the mobile device is calculated. A temperature sensor is coupled to the proximity sensor. The temperature of the mobile device is measured. A value of the capacitance of the proximity sensor is adjusted based on the coefficient and the temperature of the mobile device. The adjusted capacitance value is compared to a threshold capacitance value to determine proximity of an object to the mobile device. A radio frequency signal is adjusted by detecting proximity.

The capacitive proximity sensor includes an oscillation means, an LCR resonance circuit including a sensor electrode, a sensor circuit that outputs a determination voltage signal corresponding to the capacitance of the sensor electrode, and a control unit that detects the proximity of a human body to the sensor electrode based on the determination voltage signal. The control unit performs control that alternatingly and repeatedly executes calibration steps for updating a detection frequency f.sub.1 and a first threshold value V.sub.th1 and a detection step for detecting the proximity of the human body to the sensor electrode.

Provided is a metal touch sensing apparatus in which recognition performance thereof is improved, a plurality of touch parts are successively manipulated to enter into a specific mode, thereby preventing a refrigerator from being malfunctioned, and touch sensitivity of the refrigerator to be touched for the manipulation is visually adjusted, and a home appliance including the touch apparatus and a method for controlling the same.