Cypress Semiconductor Corporation

Parade Technologies, Ltd.

Wacom Co., Ltd.

Monterey Research, LLC

Oleksandr Karpin

Andriy Maharyta

Igor Kravets

Oleksandr Hoshtanar

Igor Kolych

Hans Klein

Viktor Kremin

Roman Ogirko

Vasyl Mandziy

Volodymyr Hutnyk

Yuriy Boychuk

Volodymyr Bihday

Ihor Musijchuk

David Gordon Wright

Mykhaylo Krekhovetskyy

Alexandre Gourevitch

Hassane El-Khoury

Edward L Grivna

Andriy Ryshtun

Patrick N Prendergast

Milton Ribeiro

Anton Konovalov

Michael Patrick Hills

Darrin Vallis

Volodymyr Burkovskyy

David Peter Finch

Kiran Uln

Paul M Walsh

Bo Soon Chang

Jan-Willem Van De Waerdt

Oleksandr Pirogov

Jens Weber

Massoud Badaye

Steve Kolokowsky

Ruslan Omelchuk

Peter G Vavaroutsos

Mark Healy

Oleksiy Savitskyy

Seok-Pyong Park

Taras Kulyk

Seok Pyong Park

An integrated circuit includes a capacitive sensing circuit to receive signal values associated with a proximity distance to an object. A pair of low pass filters (LPFs) are coupled in parallel to the capacitive sensing circuit and include a first LPF configured with a low filtering rate and a second LPF configured with high filtering rate that is higher than that of the low filtering rate. Control logic is coupled to the pair of LPFs and estimates the proximity distance based on one or more filtered signal values received from the pair of LPFs. The logic causes the second LPF to filter the signal values while the proximity distance remains unchanged. The logic detects a change in the proximity distance beyond a threshold value. The logic causes the first LPF to filter a subsequent signal value received from the capacitive sensing circuit based on detecting the change.

Precise proximity object detection for capacitive sensing

A device can include analog circuits formed with a substrate, including a comparator, analog switches, and a balance current circuit. A sensor current and balance current can be applied at an input of the comparator. The sensor current, balance current or both can be modulated with a switch control signal. Digital circuits can include switch control logic that generates the switch control signal in response to an output of the comparator and a modulation clock signal. Digital signal processing circuits can generate a multi-bit digital value from a bit stream output by the comparator circuit. The multi-bit digital value can be an analog-to-digital conversion of the sensor current. Corresponding methods and systems are also disclosed.

Current-mode analog-to-digital converter systems, devices and methods for multi-sensing

A sensor package includes at least one die, a fingerprint sensor, a mold material, and a land grid array. The fingerprint sensor is electrically coupled to the at least one die. The mold material encapsulates the at least one die. The land grid array layer is electrically coupled to the at least one die. The land grid array layer, the fingerprint sensor, and the mold material each include a common footprint.

Fingerprint sensor packages

A processing device scans a capacitive sense array to determine a characteristic of a noise signal. A processing device further detects a location of a touch proximate to the capacitive sense array by a passive touch object using a first mode of capacitance touch detection. The first mode of capacitive touch detection uses a capacitive coupling of the noise signal to the capacitive sense array through the passive touch object to detect the touch.

Passive touch detection for capacitive sense array

Systems, methods, and devices detect radio frequency identification devices. Methods include transmitting a signal from a transmitter of a wireless device compatible with a wireless communications protocol, receiving, using a receiver of the wireless device, an encoded signal from a radio frequency identification (RFID) device, and determining a plurality of data values based, at least in part, on the received encoded signal. Methods further include generating an estimated distance value based, at least in part, on the received encoded signal, the estimated distance value representing an estimate of a distance between the wireless device and the RFID device.

Systems, methods, and devices for wireless communication device-based detection of radio frequency identification devices

Measured signal data, detected by a sensor array of a device, is used to create a generated representation from the measured signal data. The generated representation is compared with a measured representation of the measured signal data to create a correlation coefficient corresponding to a correlation between the generated representation and the measured representation of the measured signal data. A hover event is detected for the device if the correlation coefficient exceeds a first threshold. If the correlation coefficient does not exceed the first threshold, then the measured signal data is determined to not be indicative of a hover event.

Hover detection for touchscreens

Apparatuses and methods of high-distance directional proximity sensors are described. One apparatus includes at least three electrodes in a sensor layer, an electrode in a shield layer, and an insulator located between the layers. A processing device is configured to scan the at least three electrodes over a period of time to obtain a digital signal for each of the at least three electrodes while driving a shield signal on the electrode of the shield layer. The processing device detects a gesture by an object using the digital signals. The processing device measures an amplitude value of the digital signal for each of the at least three electrodes and outputs an indication of the gesture responsive to a ratio of a highest amplitude value and a lowest amplitude value satisfying a first threshold criterion that represents the object being within a proximity detection area above the sensor layer.

High-distance directional proximity sensor

Apparatus and methods of impedance sensing are described. One method includes performing a first digital conversion of an attribute of a sensor electrode and performing a second digital conversion of the attribute of the sensor electrode. The second digital conversion differs by at least one characteristic from the first digital conversion. The method further includes calculating a resistance of the sensor electrode from a first and second digital value of the first and second digital conversions, respectively; and calculating a capacitance of the sensor electrode from the first and second digital value of the first and second digital conversions, respectively.

Impedance sensing methods

A fingerprint sensor-compatible overlay material which uses anisotropic conductive material to enable accurate imaging of a fingerprint through an overlay is disclosed. The anisotropic conductive material has increased conductivity in a direction orthogonal to the fingerprint sensor, increasing the capacitive coupling of the fingerprint to the sensor surface, allowing the fingerprint sensor to accurately image the fingerprint through the overlay. Methods for forming a fingerprint sensor-compatible overlay are also disclosed.

Sensor-compatible overlay

An example method of determining the position value reflecting an action applied to the capacitive sensor device comprises: receive a set of capacitance values of a plurality of capacitive cells of a capacitive sensor device; determining a local maximum of the set of capacitance values; identifying a set of neural network parameters corresponding to the local maximum of the set of capacitance values; and processing the set of capacitance values by a neural network using the identified set of neural network parameters to determine a position value reflecting an action applied to the capacitive sensor device.

Machine learning-based position determination

Technology directed to non-contact liquid sensing is described. One processing device includes a multi-port network, a capacitance measurement circuit, and a digital processing circuit. Processing device measures a first set and a second set of currents associated with a first electrode and a second electrode coupled to an exterior surface of a container holding liquid. Processing device determines independent impedances of the container, the liquid, and the liquid and container using the first set of currents and the second set of currents. Processing device determines an electrical property of the liquid using the independent impedances of the liquid.

Non-contact liquid sensing technologies

A capacitive fingerprint sensor includes a set of capacitive sensor electrodes in a sensing area. The set of capacitive sensor electrodes includes a set of transmit (Tx) sensor electrodes, a set of receive (Rx) sensor electrodes, and a set of compensation electrodes. The fingerprint sensor also includes a multiphase capacitance sensor that is configured to perform a sensing scan of the capacitive sensor electrodes by applying a first Tx signal to a first subset of the Tx sensor electrodes while simultaneously applying a second Tx signal to a second subset of the set of Tx sensor electrodes, and based on a compensation signal received at the set of compensation electrodes, reduce a component of the Rx signal originating from a source other than a contact at the sensing area.

Multiphase fingerprint sensor layout and construction

An example system drives one or more transmit signals on first electrodes disposed in a first layer and propagating electrodes disposed in a second layer. The system measures a capacitance of sensors through a of second electrodes. Each second electrode crosses each first electrode to provide a plurality of discrete sensor areas, each discrete sensor area associated with a difference crossing and including a portion of at least one propagating electrode. Each second electrode is galvanically isolated from the first electrodes and the propagating electrodes.

Fingerprint sensor pattern

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Lviv, Ukraine

Oleksandr Karpin