Phase-locked loop with dual input reference and dynamic bandwidth control
Granted: January 17, 2023
Patent Number:
11558170
Disclosed herein are systems and methods for improved performance of phase-locked loop based clock generators, particularly in the context of wireless audio. A PLL clock generator includes a PLL core configured to receive a module reference clock provided by a communications module and generate a subsystem data clock corresponding to a module data clock of the communications module; and a data clock tracker module configured to receive the module data and subsystem data clocks and…
Device and method for capacitive sensing
Granted: January 17, 2023
Patent Number:
11556212
A processing system includes a level shifter, a drive circuit, and a capacitive sensing circuit. The level shifter is configured to generate a first level-shifted output corresponding to a graylevel value and a second level-shifted output corresponding to capacitive sensing control data. The drive circuit is configured to generate an output voltage based at least in part on the first level-shifted output. The capacitive sensing circuit is configured to receive a resulting signal from a…
Input-display device with shared memory
Granted: January 17, 2023
Patent Number:
11556195
An input-display device includes a display screen on a display substrate and capacitive sensing electrodes for capacitive sensing in a sensing region of the display screen. The input-display device also includes a touch and display driver integration (TDDI) circuit on the display substrate, the TDDI circuit including a source driver circuit driving a subset of display pixels of the display screen based on a processed image signal, and an analog frontend for the capacitive sensing,…
Encoding demura calibration information
Granted: January 10, 2023
Patent Number:
11551614
A system and method for encoding, transmitting and updating a display based on demura calibration information for a display device comprises generating demura correction coefficients based on display color information, separating coherent components from the demura correction coefficients to generate residual information, and encode the residual information using a first encoding technique. Further, the image data may be divided into data streams, compressed and transmitted to from a…
Page-based memory access control
Granted: January 10, 2023
Patent Number:
11550482
A method and apparatus for controlling access to memory is disclosed. In one implementation, a memory controller may receive a memory access request that may include a virtual memory address, a device identifier (ID) and a protected access indicator. Additionally, the memory controller can receive page table entries including a physical memory address based on the virtual memory address and a security attribute associated with the physical memory address. The memory controller may access…
Short-term noise suppression
Granted: January 10, 2023
Patent Number:
11550434
A processing system is configured to drive a transmitter electrode with a repetitive multi-burst pattern. The repetitive multi-burst pattern includes a first multitude of bursts of a sensing waveform and a second multitude of bursts of the sensing waveform. The second multitude of bursts is a repetition of the first multitude of bursts. The processing system is further configured to receive, from a receiver electrode, a resulting signal in response to the repetitive multi-burst pattern,…
Reducing false triggers in motion-activated cameras
Granted: January 3, 2023
Patent Number:
11546514
This disclosure provides methods, devices, and systems for controlling motion-activated cameras. The present implementations more specifically relate to reducing false triggers in motion-activated camera systems. In some implementations, a motion-activated camera system may include a camera, a first motion sensor having a wide field-of-view (FOV), and a second motion sensor having a narrow FOV. In some aspects, the motion-activated camera system may be configured to operate in a wide-FOV…
Process monitor for wafer thinning
Granted: January 3, 2023
Patent Number:
11545366
A system and method for thinning an integrated circuit (IC) wafer. The system includes a support structure to hold the IC wafer and a mechanism to operate on the IC wafer. The support structure includes one or more inductive coils configured to transmit a power signal to the IC wafer and receive a feedback signal from the IC wafer. The system further includes a process controller to control the operation based at least in part on the feedback signal received from the IC wafer.
Inter-band harmonics interference mitigation for multi-frequency-region parallel scan
Granted: December 20, 2022
Patent Number:
11531425
A method for operating an input device, the method involving obtaining a number of non-sinusoidal transmitter signals with unique base frequencies, and selecting a sampling frequency of an analog-to-digital converter (ADC) such that a number of aliasing artifacts associated with higher harmonics of the non-sinusoidal transmitter signals is located at frequencies different from the base frequencies.
Multi-frequency-region touch sensing
Granted: December 20, 2022
Patent Number:
11531439
An input device includes transmitter electrodes disposed in a sensing region of the input device, a receiver electrode in the sensing region, and a processing system. The processing system includes demodulators, and is configured to simultaneously drive at least a subset of the transmitter electrodes using a multitude of transmitter signals with unique frequencies. The processing system is also configured to receive, on the receiver electrode, a resulting signal, and demodulate, using…
Low power baseline tracking for fingerprint sensor
Granted: December 13, 2022
Patent Number:
11527094
Low power consumption baseline tracking systems and methods for automatically tracking a baseline input into a capacitive sensor having a plurality of transmitter electrodes and a plurality of receiver electrodes. A partial baseline scan is captured by driving all or a portion of the plurality of transmitter electrodes simultaneously and detecting receiver signals from a subset of the at least one receiver electrode simultaneously, and the partial baseline scan is compared with a stored…
Active common mode compensation for improved amplifier performance
Granted: December 6, 2022
Patent Number:
11522507
Various techniques are provided to reduce common mode disturbance associated with an amplifier, such as a class D amplifier. In one example, an amplifier includes a power stage configured to generate first and second PWM signals. The amplifier further includes an integration stage comprising input nodes configured to receive an input differential analog signal. The integration stage is configured to generate an output differential analog signal in response to the PWM signals and the…
Device and method for testing interconnection of display module
Granted: December 6, 2022
Patent Number:
11521526
A display driver comprises a decoder, a first source amplifier and a logic circuitry. The decoder is configured to output a grayscale voltage corresponding to an image data. The first source amplifier is configured to output a first source output voltage corresponding to the grayscale voltage to a first external output terminal. The logic circuitry is configured to generate fault detection data for fault detection of a test object connected to the first external output terminal. The…
Force sensing within display stack
Granted: December 6, 2022
Patent Number:
11520423
Embodiments described herein include an input device and associated processing system for sensing force applied by input objects. The input device comprises a display device comprising a plurality of layers formed as a display stack, the display stack including a top surface. The input device further comprises one or more strain gauges disposed within the display stack and configured to detect force applied to the top surface, and a processing system configured to perform display…
Sensor device for transcapacitive sensing with shielding
Granted: December 6, 2022
Patent Number:
11519801
A silicon sensor device includes a plurality of metal layers and a plurality of dielectric layers. The plurality of metal layers include: a first metal layer comprising a plurality of transmitter electrodes and a plurality of receiver electrodes; a second metal layer disposed beneath the first metal layer, wherein the second metal layer comprises a plurality of routing traces for the plurality of transmitter electrodes; and one or more circuit layers disposed beneath the second metal…
Under-display image sensor
Granted: November 29, 2022
Patent Number:
11516374
A device includes a display and a first light source configured to emit light, wherein the first light source is proximate to the display. The device further includes a first camera disposed behind the display, wherein the first camera is configured to detect reflections of the light emitted by the first light source. The first camera is further configured to capture a first image based at least in part on the reflections, wherein the reflections are partially occluded by the display.…
Reducing interference within a display panel while performing input sensing
Granted: November 29, 2022
Patent Number:
11513635
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…
System and method for mitigating impulse noise and burst noise in touch sensing
Granted: November 29, 2022
Patent Number:
11513633
An input device comprising a set of electrodes configured to detect a user input of a user and a processing system is provided. The processing system comprises a signal level monitor configured to detect burst noise or impulse noise and one or more processors configured to: perform a scan step of a plurality of scan steps by driving one or more first transmitter electrodes of the plurality of transmitter electrodes with one or more sensing signals; obtain one or more first resulting…
Sensor patterns for capacitive imaging sensors in touch displays
Granted: November 22, 2022
Patent Number:
11507236
A sensor pattern for capacitive sensing includes a first electrode and a multitude of second electrodes capacitively coupled to the first electrode. The first electrode includes a strip extending in a vertical direction across the sensor pattern. The multitude of second electrodes include a first subset and a second subset. The first subset of the multitude of second electrodes is arranged in a first column, the first column extending in a vertical direction. The second subset of the…
Built-in test of a display driver
Granted: November 22, 2022
Patent Number:
11508273
A display driver includes image processing circuitry, driver circuitry, and test circuitry. The image processing circuitry is configured to generate first output data during a first display update period and generate second output data during a second display update period. The driver circuitry is configured to update a display panel based on the first output data during the first display update period and update the display panel based on the second output data during the second display…
