Subaudible tones to validate audio signals
Granted: March 22, 2022
Patent Number:
11282527
A method and processing system for validating an audio signal is disclosed. A valid audio signal is an audio signal that has been determined to originate from a microphone and has not been provided by a digital audio source. In some implementations, one or more speakers may generate a sequence of one or more subaudible tones. Simultaneously, a microphone near the one or more speakers captures an audio signal. If the captured audio signal includes the one or more subaudible tones from the…
Device and method for brightness control of display device based on display brightness value encoding parameters beyond brightness
Granted: March 8, 2022
Patent Number:
11270662
A display driver comprises signal supply circuitry and control circuitry. The control circuitry is configured to generate a first luminance value using a DBV. The signal supply circuitry is configured to supply to a display panel at least one signal using the first luminance value. The first luminance value has a one-to-one correlation with the display brightness level. The DBV does not have a one-to-one correlation with the display brightness level.
Device and method for setting display driver
Granted: March 8, 2022
Patent Number:
11270609
A system and method for generate mura correction data comprises obtaining brightness values of a pixel-existing area and a pixel-absent area of a display panel. Further, updated brightness values are generated by replacing the brightness value of the pixel-absent area with a suitable value. Mura correction data is generated using the updated brightness values. A display driver is configured with the mura correction data for updating a display device.
Zero-crossing detector for DC-DC converter systems and methods
Granted: March 1, 2022
Patent Number:
11264977
Embodiments described herein provide a zero-crossing detector (ZCD) for a direct current to direct current (DC-DC) converter. The ZCD includes a ZCD integrator configured to receive a switch voltage and an output voltage of a power stage of the DC-DC converter and to generate a zero-crossing detect signal based, at least in part, on the received switch voltage and output voltage, where the zero-crossing detect signal is configured to indicate an output current in an output inductor of…
Robust speaker localization in presence of strong noise interference systems and methods
Granted: March 1, 2022
Patent Number:
11264017
Systems and methods include a plurality of audio input components configured to generate a plurality of audio input signals, and a logic device configured to receive the plurality of audio input signals, determine whether the plurality of audio signals comprise target audio associated with an audio source, estimate a relative location of the audio source with respect to the plurality of audio input components based on the plurality of audio signals and a determination of whether the…
Non-contact gesture commands for touch screens
Granted: February 22, 2022
Patent Number:
11256413
A method for displaying aerial images includes detecting a capacitive response of a non-contact gesture made by a user proximate to a touch sensing enabled display screen, and in response to detecting the non-contact gesture, displaying one or more images in a three-dimensional (3D) space proximate to the display screen.
Flexible connector for a display device
Granted: February 22, 2022
Patent Number:
11259406
A flexible connector comprises a first plurality of pads disposed within an integrated circuit (IC) area, a second plurality of pads disposed in the IC area, and a plurality of through holes disposed in the IC area. The flexible connector further comprises first wiring coupled to the plurality of through holes and the first plurality of pads, and a rigidity element at least partially disposed between the plurality of through holes and the second plurality of pads.
Over current protection with improved stability systems and methods
Granted: February 22, 2022
Patent Number:
11258250
Systems and methods are provided for improved stability of driver amplifiers. In one example, a system includes an NMOSFET power device operable to generate a current signal at a drain terminal. The system further includes a current comparison amplifier operable to amplify a difference signal comprising a difference between a replica current signal of the NMOSFET power device and a reference current signal to drive a current comparison amplifier voltage output signal. The system further…
Adaptive spatial VAD and time-frequency mask estimation for highly non-stationary noise sources
Granted: February 22, 2022
Patent Number:
11257512
Systems and methods include a first voice activity detector operable to detect speech in a frame of a multichannel audio input signal and output a speech determination, a constrained minimum variance adaptive filter operable to receive the multichannel audio input signal and the speech determination and minimize a signal variance at the output of the filter, thereby producing an equalized target speech signal, a mask estimator operable to receive the equalized target speech signal and…
Method and system for stabilizing a source output voltage for a display panel
Granted: February 22, 2022
Patent Number:
11257414
A display driver comprises: a first grayscale line; output circuitry configured to receive a first grayscale voltage from the first grayscale line and perform digital-analog conversion on a pixel data to output a source output voltage corresponding to the pixel data, the digital-analog conversion being based on the first grayscale voltage; and first gamma assist circuitry comprising a first holding node to hold the first grayscale voltage received from the first grayscale line and…
Rotatable knob interface
Granted: February 22, 2022
Patent Number:
11256376
A sensing system is provided. A processing system drives a first subset of sensor electrodes with a sensing signal and receives corresponding resulting signals. The processing system also drives a second subset of the sensor electrodes with a reference signal and a third subset of the sensor electrodes with a guard signal. A rotatable electronic device includes a first coupling electrode and a second coupling electrode. The second coupling electrode couples with and receives the…
Synchronizing input sensing with display updating
Granted: February 22, 2022
Patent Number:
11256366
A processing system configured to receive a first display control signal corresponding to a non-display update period of a display frame and a second display control signal corresponding to a display update period of the display frame. The processing system is further configured to acquire, based on receipt of the first display control signal, first resulting signals from sensor electrodes electrically connected to the sensor driver by operating the sensor electrodes for a first type of…
Operational amplifier with reduced input capacitance
Granted: February 15, 2022
Patent Number:
11251761
An operational amplifier includes a first transistor, a second transistor, a third transistor, a first constant current source, an output state, a first switch, and a second switch. The first transistor has a first gate configured to receive an output voltage from an output node. The second transistor has a second gate. The third transistor has a third gate configured to receive an input voltage. The first constant current source is coupled to sources of the first transistor, the second…
Display driver
Granted: February 15, 2022
Patent Number:
11250817
A display driver is disclosed. The display driver includes: a memory configured to store control points defining a curve associated with a display panel; and shape calculation circuitry configured to: determine, based on the control points, a first intersection point of the curve and a width of a first line associated with the display panel; and modify image data of an image based on the first intersection point.
EMI mitigation by shifted source line pre-charge
Granted: February 15, 2022
Patent Number:
11250753
A method of driving pixels of a display device includes, for a set of N pixels of the display device that are connected to a switch, each of the N pixels to be driven during a time period T, applying, to a first pixel of the set, a first pre-charge signal, and applying, in sequence, to each remaining pixel of the set, a corresponding pre-charge signal, such that the start of the pre-charge signal for a Kth pixel is delayed by a time ?tk, from the start of the pre-charge signal for the…
Device and method for controlling a display panel
Granted: February 1, 2022
Patent Number:
11238779
A display driver includes internal oscillator circuitry, timing controller circuitry, and panel interface circuitry. The internal oscillator circuitry is disposed internal to the display driver and configured to generate an internal oscillation signal. The timing controller circuitry is configured to generate a resultant sync signal using an external sync input received from an entity external to the display driver during a first period of a frame period. The timing controller circuitry…
Multi-tone ultrasonic proximity detection
Granted: February 1, 2022
Patent Number:
11237266
A method and apparatus for detecting the presence of an input object is provided. The apparatus may include one or more capacitive sensor electrodes, a speaker, a microphone, and a processor. The one or more capacitive sensor electrodes may detect a change in capacitance. The processor may cause the speaker to generate a first audio signal. The microphone may receive a first audio signal having the first frequency and a reflected first audio signal. The processor may determine a first…
Systems and methods for behavioral authentication using a touch sensor device
Granted: January 25, 2022
Patent Number:
11232178
Disclosed is an input device, comprising a touch sensor and a processing system. The touch sensor includes a touch sensing region and a plurality of pixels in the touch sensing region. The processing system is coupled to the touch sensor and comprises circuitry configured to: determine that a touch has occurred on a touch sensor; for each pixel included in the touch, receive touch information from the touch sensor; for each pixel included in the touch, determine a pixel response value…
Device and method for driving a display panel
Granted: January 18, 2022
Patent Number:
11227563
A display driver chip includes interface circuitry, image data processing circuitry, and drive circuitry. The interface circuitry is configured to receive first frame image data for a first frame image. The image data processing circuitry includes a buffer memory configured to store at least part of the first frame image data. The image data processing circuitry is configured to supply, based on the at least part of the first frame image data stored in the buffer memory, first display…
Context-aware control for smart devices
Granted: January 4, 2022
Patent Number:
11217240
A voice-interaction device includes a plurality of input and output components configured to facilitate interaction between the voice-interaction device and a target user. The plurality of input and output components may include a microphone configured to sense sound and generate an audio input signal, a speaker configured to output an audio signal to the target user, and an input component configured to sense at least one non-audible interaction from the target user. A context…
