360-degree multi-source location detection, tracking and enhancement
Granted: March 23, 2021
Patent Number:
10957338
Audio processing systems and methods comprise an audio sensor array configured to receive a multichannel audio input and generate a corresponding multichannel audio signal and a target activity detector configured to identify audio target sources in the multichannel audio signal. The target activity detector includes a VAD, an instantaneous locations component configured to detect a location of a plurality of audio sources, a dominant locations component configured to selectively buffer…
Input device having reduced electromagnetic interference
Granted: March 23, 2021
Patent Number:
10955967
An input device comprises a plurality of data lines of a display panel, a plurality of sensor electrodes, and a processing system. The processing system drives a sensor electrode with a sensing signal during a first portion of a non-display update period of a display frame. A source driver of the processing system drives a data line with a first constant voltage during at least one of a second portion of the non-display update period and a third portion of the non-display update period.…
Method and system for optical imaging using point source illumination
Granted: March 23, 2021
Patent Number:
10955603
Disclosed are systems and methods for imaging an object. For example, an optical sensor for imaging an input object, comprises: a sensor substrate comprising detector pixels; a scattering layer; a cover layer including a sensing surface, wherein the scattering layer is disposed between the sensor substrate and the cover layer; and, a light source. The optical sensor is configured to: illuminate the light source causing light beams to emanate from the light source to produce an effect of…
Single-layer sensor array scan
Granted: March 16, 2021
Patent Number:
10949034
A method of performing a scan of a sensor array is disclosed, as well as an associated processing system and input device. The sensor array comprises a plurality of sensor electrodes in a single layer. A plurality of routing traces is arranged in the single layer. The method comprises, for each sensor electrode of the plurality of sensor electrodes, acquiring, during a first period, an absolute capacitive measurement for the sensor electrode. The method further comprises, for each…
Balanced stereo headphones with un-balanced air chambers
Granted: March 9, 2021
Patent Number:
10945058
Speaker performance may be improved by increasing the effective acoustic chamber volume by fluidically connecting a speaker chamber containing a speaker with a mechanical housing. Additionally, the performance of left and right speakers may be balanced. Such balancing may be through equalization of the left and right speakers, balancing the acoustic impedance through sizing the openings between the speaker chambers and mechanical housings, and/or balancing of acoustic volumes within the…
Display device having an integrated sensing device with reduced interference
Granted: March 9, 2021
Patent Number:
10944389
A processing system for an input device comprises drive circuitry configured to generate a fixed voltage for a common voltage electrode of the input device during a display update period, and generate a sensing signal for the common voltage electrode during an input sensing period, the sensing signal having a duty cycle and a mean value, wherein the duty cycle minimizes a difference between the fixed voltage and the mean value. An input device comprises one or more common voltage…
Semiconductor device and method for driving a display panel
Granted: March 9, 2021
Patent Number:
10943542
A semiconductor device comprises circuitry and a timing generator. The circuitry is configured to generate an emission control signal that controls light emission of pixels of a display panel such that a first vertical sync period comprises a plurality of control cycles for the light emission of the pixels. The timing generator is configured to, when a length of the first vertical sync period is changed, start a next vertical sync period following the first vertical sync period at timing…
Device and method for gate driving of display panel
Granted: March 9, 2021
Patent Number:
10943522
A display device comprises a display panel and a display driver. The display panel comprises a plurality of gate lines. The display driver is configured to control, based on a first image data, an order in which the plurality of gate lines are driven.
Spatially encoded sensor electrodes
Granted: March 9, 2021
Patent Number:
10942608
A capacitive sensing device has a first plurality of sensor electrodes, and a second plurality of sensor electrodes overlapping the first plurality of sensor electrodes. A first sensor electrode of the second plurality of electrodes overlaps a first subset of the first plurality of electrodes and comprises apertures disposed according to first codes. The first codes comprise first and second coefficients and along one of the first plurality of sensor electrodes. Each aperture may…
Multiple input multiple output (MIMO) audio signal processing for speech de-reverberation
Granted: February 23, 2021
Patent Number:
10930298
Audio signal processing for adaptive de-reverberation uses a least mean squares (LMS) filter that has improved convergence over conventional LMS filters, making embodiments practical for reducing the effects of reverberation for use in many portable and embedded devices, such as smartphones, tablets, laptops, and hearing aids, for applications such as speech recognition and audio communication in general. The LMS filter employs a frequency-dependent adaptive step size to speed up the…
Display control and touch detection device, semiconductor integrated circuit
Granted: February 23, 2021
Patent Number:
10928949
A display control and touch detection device is capable of controlling display and non-display terms in start timing depending on a result of touch detection, and includes a nonvolatile memory and a control logic which selectively uses data stored in the memory according to a display mode. The control logic changes the display and non-display terms in start timing in display frame periods, whereby the phenomenon of appearance of an undesired brightness difference at a fixed location in a…
Device and method for proximity sensing on an input device
Granted: February 23, 2021
Patent Number:
10928944
A processing system comprises a first source amplifier and an analog front end. The first source amplifier comprises a first input electrically connectable to a first sensor electrode of a display panel and configured to generate a first drive signal based on a first grayscale voltage corresponding to a first pixel data and generate a first comparison output signal based on a first sensing signal from the first sensor electrode and a reference voltage. The analog front end is configured…
Integrated fingerprint and force sensor
Granted: February 16, 2021
Patent Number:
10922515
An integrated sensing device comprising a force sensor and fingerprint sensor disposed on different portions of a flexible circuit. The fingerprint sensor is disposed on a first side of a first portion of the flexible circuit and the force sensor is disposed on a second portion of the flexible circuit. The flexible circuit is configured such that the first portion is over the second portion. The fingerprint sensor includes fingerprint sensor electrodes disposed on the first side of the…
Device and method for capacitive sensing with noise mitigation
Granted: February 16, 2021
Patent Number:
10921939
A semiconductor device comprises first mixer circuitry and processing circuitry. The first mixer circuitry is configured to generate a plurality of first mixer outputs through quadrature decomposition of a sensing signal. The first sensing signal corresponds to a capacitance of a first sensing electrode supplied with a drive signal. The quadrature decomposition is based on an in-phase local carrier which is in phase with the drive signal and an out-of-phase local carrier having a phase…
Rotatable knob interface
Granted: February 16, 2021
Patent Number:
10921913
A rotatable device has a stationary base including bottom and top surfaces. The bottom surface has a first set of coupling electrodes configured to receive a reference signal from first electrodes of an attached input device, and second and third sets of coupling electrodes each configured to receive resulting signals from a second set of input device electrodes. The top surface of the stationary base has first, second and third top regions respectively connected to the first, second and…
Interposer for a display driver integrated circuit chip
Granted: February 16, 2021
Patent Number:
10921855
A semiconductor assembly for a display device comprises a display driver integrated circuit (DDIC) chip and an interposer coupled to the DDIC chip. The DDIC chip comprises a plurality of output pads and a plurality of input pads. Further, the DDIC chip is configured to drive a plurality of data lines of the display device to update an active region of the display device. The interposer comprises a plurality of output pads coupled to the plurality of output pads of the DDIC chip and is…
System and method for display power reduction
Granted: February 9, 2021
Patent Number:
10916176
A display driver includes a plurality of source amplifiers configured to drive a plurality of source lines of a display panel, and an amplifier control system configured to control the source amplifiers. Each of the source amplifiers is configured to drive a source line with a drive voltage corresponding to a grayscale value specified by an image data associated with each of the source amplifiers. The amplifier control system is configured to control execution and stopping of an…
Minimizing latency for resonant input object detection and classification
Granted: February 2, 2021
Patent Number:
10908750
A method includes driving, by the master controller, transmitter electrodes with a first transmitter signal having a first sensing frequency while transmitting a first trigger signal to slave controllers, obtaining a location of an input object determined from first capacitive measurements determined by the slave controllers using the first trigger signal, and performing a resonant frequency scan. The performing the resonant frequency scan is by performing for each possible resonant…
Low delay decimator and interpolator filters
Granted: January 26, 2021
Patent Number:
10904661
Systems and methods for low latency adaptive noise cancellation include an audio sensor to sense environmental noise and generate a noise signal, an audio processing path to receive an audio signal, process the audio signal through an interpolation filter, and generate a primary audio signal having a first sample frequency, an adaptive noise cancellation processor to receive the noise signal and generate an anti-noise signal, a direct interpolator to receive the anti-noise signal and…
Sensor design for NFC-integrated touchpad
Granted: January 5, 2021
Patent Number:
10884558
An input device includes a plurality of sensor electrodes, an antenna, and a shield trace disposed between at least some of the sensor electrodes and the antenna. The antenna may be coupled to a transceiver and may transmit and receive radio-frequency (RF) communication signals. The shield trace may reduce, at least in part, coupling of the RF communication signals from the antenna to the sensor electrodes. The plurality of sensor electrodes may determine a presence, and/or a motion…
