Disclosed are a single-channel multi-region motion sensor and a method of operating the same. The single-channel multi-region motion includes: a first resonant circuit; at least one first electrode electrically connected to the first resonant circuit; a second resonant circuit; at least one second electrode electrically connected to the second resonant circuit; and a detection circuit configured to receive a first electric signal formed on the first resonant circuit and the at least one first electrode and a second electric signal formed on the second resonant circuit and the at least one second electrode. The detection circuit detects a difference between the first resonant frequency of the first electric signal and the second resonant frequency of the second electric signal, and detects the proximity of a conductor or the location of a touch attributable to a user motion.

Techniques are described for controlling operation of both a host device and a wearable display device connected to the host device based on a use status of the wearable display device. The techniques include automatically determining a use status of a wearable display device based on feedback from one or more touch sensors within the wearable display device that indicates whether the wearable display device is worn by a user. Based on the determined use status, the wearable display device controls its own operation (e.g., controls operation of display screens of the wearable display device, a communication session with the host device, and display processing of data received from the host device). The wearable display device also sends an indication of the use status to the host device. The host device then controls its own data processing for the wearable display device based on the indicated use status.

An interference determining circuit for a capacitive sensor device comprises an amplifier, absolute differential circuitry, and comparator circuitry. The amplifier is configured for receiving a reference voltage at a first input and for receiving a resulting signal at a second input. The resulting signal is from a sensor electrode of the capacitive sensor device. The absolute differential circuitry is coupled with an output of the amplifier and configured for outputting a difference signal. The difference signal represents an absolute differential between currents utilized in the amplifier. The comparator circuitry is coupled with the absolute differential circuitry and configured for generating a non-linearity indication based on a comparison of the difference signal with at least one reference signal.

A multipoint contact detection device includes at least two capacitive or inductive sensitive structures associated with respective primary detection zones of a surface that a person is likely to contact. The sensitive structures are positioned with a separation that is small enough between them to define at least one intermediate detection zone that the person is likely to contact while exerting a capacitive or inductive disturbance on the adjacent sensitive structures. The device also includes a processing circuit configured to detect, for each sensitive structure, a disturbance induced by the person coming into proximity or into contact and locating the region or regions of the surface with which the person comes into contact relative to the primary detection zones and the one or more intermediate detection zones.

An electrostatic sensor includes a detection electrode, a shield electrode provided in a periphery of the detection electrode, a first power supply coupled to the detection electrode and configured to generate an AC voltage having a first amplitude, a second power supply coupled to the shield electrode and configured to generate an AC voltage having a second amplitude, a measuring device configured to measure a quantity of charge flowing from the first power supply to the detection electrode, and a control device coupled to the measuring device. The AC voltages generated by the first and second power supplies have the same frequency and the same phase. The second amplitude is larger than the first amplitude. A detection target on a side of a detection surface is detected based on a change in an electrostatic capacitance between the detection electrode and the detection target.

Disclosed are a single-channel multi-region motion sensor and a method of operating the same. The single-channel multi-region motion includes: a first resonant circuit; at least one first electrode electrically connected to the first resonant circuit; a second resonant circuit; at least one second electrode electrically connected to the second resonant circuit; and a detection circuit configured to receive a first electric signal formed on the first resonant circuit and the at least one first electrode and a second electric signal formed on the second resonant circuit and the at least one second electrode. The detection circuit detects a difference between the first resonant frequency of the first electric signal and the second resonant frequency of the second electric signal, and detects the proximity of a conductor or the location of a touch attributable to a user motion.

A sensing device with a fingerprint sensor is provided. The sensing device includes a touch input pattern included in the fingerprint sensor, an oscillation circuit connected to the touch input pattern and configured to change a capacitance of the oscillation circuit when a touch occurrence is sensed by the touch input pattern and generate an oscillation signal based on the change in the capacitance, and an operation detection circuit configured to detect a touch occurrence based on a frequency included in the oscillation signal input from the oscillation circuit and generate a detection signal.

A system includes a robot having contact surfaces and a sensor array having a spatially distributed touch sensors disposed on the contact surfaces. Each touch sensor has an identifier and outputs an analog signal at a set of frequencies associated with the identifier The sensor array outputs a combined analog signal representative of a combination of the analog signals outputted by the touch sensors. The system includes an analog-to-digital converter that generates a digital signal in a time domain based on the combined analog signal. The system includes one or more processing units that transforms the digital signal from the time domain to a frequency domain and detects locations of touch within the sensor array based on frequencies observed the frequency domain and the identifiers of the touch sensors.

A capacitive sensor including a sensor electrode connected to a signal generation circuit and a signal evaluation circuit. The signal generation circuit contains a signal generator that is a noise generator or a pseudo-noise generator, the signal evaluation circuit includes a synchronous rectifier. The synchronous rectifier is connected for synchronization to the signal generator.

A transform is used to transform raw sensor data from the time domain to the frequency or sequency domain. The transformed data falls into several signal bins. The transformed data in at least one of the signal bins is analyzed to determine whether a touch event or release event has occurred.