Noise suppression circuit
Granted: October 4, 2022
Patent Number:
11460953
A processing system is disclosed. The processing system includes an amplifier including a multitude of input resistors receiving a multitude of reduced noise signals from a multitude of charge integrators and a summing resistor at an output of the amplifier. The amplifier is configured to generate a feedback signal at the output of the amplifier by amplifying each of a multitude of reduced noise signals using a gain value and a cardinality of the multitude of reduced noise signals. The…
Operational amplifier with reduced input capacitance
Granted: September 27, 2022
Patent Number:
11456715
An operational amplifier includes an output transistor having a gate coupled to an output node, at least one intermediate transistor each having a common gate node, an input transistor having a gate coupled to an input node, and a load device coupled to sources of the output transistor, the at least one intermediate transistor, and the input transistor. The operational amplifier further includes an output stage coupled to the output node, configured to drive the voltage on the output…
Optical biometric sensor with automatic gain and exposure control
Granted: September 20, 2022
Patent Number:
11450142
An optical imaging device for imaging a biometric input object is provided. The optical imaging device includes an optical sensor having an array of sensing elements. The optical sensor is configured to first read a first subset of sensing elements in the array of sensing elements; analyze the first read of the first subset of sensing elements to determine an ambient light condition; first alter an operating point of the optical imaging device based on the ambient light condition; and…
Derivation of depth information from time-of-flight (TOF) sensor data
Granted: September 20, 2022
Patent Number:
11448739
A time-of-flight sensor includes a light source to transmit periodic bursts light in a direction of one or more objects and an array of optical sensing elements to detect light reflected from the one or more objects and generate sensor data corresponding to the detected light. A distance calculator determines depth information of the one or more objects by determining a general phase shift of the reflected light relative to the transmitted light based on a first frame of the sensor data…
Class-G control system with low latency signal path
Granted: September 13, 2022
Patent Number:
11444590
Systems and methods include a digital control module that receives and processes audio data for output through a loudspeaker. An analog block receives the audio data and the power control signal and amplifies the audio data for output. A first processing path includes a buffer to delay the audio data, a first component to combine the buffered audio data and anti-noise. A second processing path includes an absolute value block to receive the audio data and an envelope detector to receive…
Device and method for scaling pixel brightness based on location of a target pixel
Granted: September 13, 2022
Patent Number:
11443671
A display driver includes control circuitry and image processing circuitry. The control circuitry is configured to store a default gamma curve and determine a scaling factor based on a location of a target pixel in a display panel. The control circuitry is further configured to determine a modified gamma curve by scaling the default gamma curve with the scaling factor. The image processing circuitry configured to apply a gamma transformation based on the modified gamma curve to image…
Display driver, image processing circuitry, and method
Granted: September 6, 2022
Patent Number:
11436968
A display driver that drives a display panel comprises storage circuitry, color addition processing circuitry, and drive circuitry. The storage circuitry stores F subpixel data acquired from color coordinate data indicating color coordinates of a displayed color in a predetermined color space displayed on the display panel when an R subpixel, a G subpixel, and a B subpixel in each of a plurality of pixels of the display panel are driven with drive signals corresponding to a minimum…
Device and method for driving a display panel
Granted: September 6, 2022
Patent Number:
11436962
A display driver includes control circuitry and image processing circuitry. The control circuitry is configured to store first and second predetermined gamma curve defined for first and second regions of a display panel, respectively, the first region having a different pixel layout than the second region. The control circuitry is further configured to determine first and second modified gamma curves by scaling the first and second predetermined gamma curves with a common scale factor.…
Reducing interference within a display panel while performing input sensing
Granted: May 10, 2022
Patent Number:
11327605
A processing system for an input device comprises sensor circuitry. The sensor circuitry is configured to operate sensor electrodes for input sensing during a first sensing frame. During a first period of the first sensing frame the sensor circuitry is configured to drive a first portion of the sensor electrodes with a sensing signal, drive a second portion of the sensor electrodes with a guarding signal, and drive a third portion of the sensor electrodes with a reference signal. The…
Generalized negative log-likelihood loss for speaker verification
Granted: May 10, 2022
Patent Number:
11328733
Systems and methods for speaker verification comprise optimizing a neural network by minimizing a generalized negative log likelihood function, including receiving a training batch of audio samples comprising a plurality of utterances for each of a plurality of speakers, extracting features from the audio samples to generate a batch of features, processing the batch of features using a neural network to generate a plurality of embedding vectors configured to differentiate audio samples…
Dynamic overdrive for liquid crystal displays
Granted: April 26, 2022
Patent Number:
11315518
A method and apparatus for overdriving pixel elements to a desired voltage. A display device comprises a pixel array and overdrive circuitry to determine a current pixel value for a first pixel element of the pixel array and a target pixel value for the first pixel element. The overdrive circuitry is further configured to determine a first voltage to be applied to the first pixel element to cause the first pixel element to transition from the current pixel value to the target pixel value…
Fingerprint sensor having an increased sensing area
Granted: April 19, 2022
Patent Number:
11308309
A fingerprint sensing device having an image sensing device and configured to detecting fingerprint data of an input object. The image sensing device includes a plurality of lenses, and a plurality of sensing elements. The plurality of sensing elements includes a first sensing element has a field of view associated with a first lens of the plurality of lenses and laterally offset from a center of the first lens, and a second sensing element has a field of view associated with a second…
Proximity detection for wireless in-ear listening devices
Granted: April 5, 2022
Patent Number:
11297429
Systems and methods for detecting proximity of a wireless listening device to a user's ear comprise a housing adapted for positioning in and/or adjacent to an ear canal of a user, wireless components disposed within the housing, the wireless components operable to receive a wireless signal from a host device, and in-ear detection components operable to analyze the wireless signal and detect a proximity of the housing to the ear canal of the user. The in-ear detection components may…
Baseline update for input object detection
Granted: April 5, 2022
Patent Number:
11294514
Baseline update for input object detection includes determining raw measurements from resulting signals acquired for a sensing region, obtaining a masked region of the sensing region based on the raw measurements, and generating a baseline update value using a subset of the raw measurements corresponding to an unmasked region. A baseline value of the masked region is updated using the baseline update value to obtain an updated baseline. A location of an input object is detected using the…
Display interference mitigation
Granted: April 5, 2022
Patent Number:
11294505
A sensor driver comprises a receiver and an interference mitigation element. The receiver is configured to acquire a resulting signal from a sensor electrode. The interference mitigation element is communicatively coupled with the receiver and is configured to receive interference data, generate an interference estimate from the interference data and a transfer function, and communicate the interference estimate to the receiver. The interference estimate removes charge from a resulting…
Self-biased differential transmitter
Granted: March 29, 2022
Patent Number:
11290073
A self-biased differential transmitter is provided. The transmitter may include a differential output driver powered by a supply voltage provided by a differential signal receiver. The output driver may include a bias voltage generator to generate bias voltages to enable one or more transistors in the output driver to operate with differential signals that are beyond the safe operating voltage range of transistors included within the differential transmitter.
Display rescan
Granted: March 29, 2022
Patent Number:
11289045
A method and apparatus for updating pixel elements of a display device. The display device comprises a pixel array including a plurality of pixel elements and one or more light sources to illuminate the pixel array at a first instance of time. A data driver is configured to receive a frame of display data corresponding to an image to be displayed on the pixel array at a first instance of time. The data driver scans each row of the pixel array, during a pixel adjustment period prior to…
System and method for generating corrected sensor data
Granted: March 22, 2022
Patent Number:
11281345
A system and method for capacitive sensing comprise acquiring first capacitive sensor data and second capacitive sensor data from a plurality of sensor electrodes, and determining positional information from one or more input objects based on the first capacitive sensor data and the second capacitive sensor data. The plurality of sensor electrodes are driven with transcapacitive sensing signals for capacitive sensing during one or more transcapacitive sensing blocks to acquire the first…
Device and method for display brightness control
Granted: March 22, 2022
Patent Number:
11282480
A display driver includes gamma curve control circuitry and a converter controller. The gamma curve control circuitry is configured to generate a first gamma curve for a first display brightness value (DBV), and a second gamma curve for a second DBV lower than the first DBV. The converter controller is configured to control a digital-analog converter (DAC) configured to perform digital-analog conversion of an input image data. Further, the converter controller is configured to adjust an…
System and method for display compensation
Granted: March 22, 2022
Patent Number:
11282431
A system and method for updating a display of a display device. The display device may include a plurality of subpixels, and a display driver coupled to the plurality of subpixels. The display driver may be configured to compare a first data signal of a first statistically selected subpixel of the plurality of subpixels to a first statistically selected threshold, increase a value of a first counter corresponding to the first statistically selected subpixel in response to the first…
