Audio analog-to-digital converter systems and methods
Granted: May 21, 2019
Patent Number:
10298245
An analog-to-digital conversion (ADC) system includes a transconductance amplifier, loop filter, quantizer, logic circuit, and digital-to-analog converter (DAC). The transconductance amplifier is configured to generate a current signal in response to an audio signal. The loop filter is connected to the transconductance amplifier and configured to generate a filtered signal based on the current signal. The quantizer is configured to generate a digital representation of the filtered…
Display driver adapted to image data processing and operating method of the same
Granted: May 21, 2019
Patent Number:
10297189
A display driver for driving a display panel includes a delay circuit configured to receive first image data and output the received first image data with a delay; an image data processing circuit configured to select a selected image data processing operation from among a plurality of predefined image data processing operations in response to image format information specifying the format of the first image data, and generate second image data by performing the selected image data…
Biometric enrollment using a display
Granted: May 21, 2019
Patent Number:
10296772
A method, system, and non-transitory computer readable medium for in-display fingerprint enrollment that may include receiving an indication to begin a fingerprint enrollment process on an electronic device with an in-display fingerprint sensor; displaying a first fingerprint enrollment shape over the in-display fingerprint sensor; and receiving, in response to displaying the first fingerprint enrollment shape and via a first user interaction, a first portion of fingerprint data.…
Full-bridge strain-gauge array of finger thermal compensation
Granted: May 21, 2019
Patent Number:
10296148
A force sensor having a strain gauge array including force sensing electrodes arranged in a full-bridge configuration comprising at least two of a first resistor type and at least two of a second resistor type, wherein the at least two of the first resistor type form a first force sensing node and the at least two of the second resistor type form a second force sensing node, a processing system communicatively coupled to the force sensing electrodes, the processing system being…
Trusted system for a user profile
Granted: May 14, 2019
Patent Number:
10291624
Disclosed is a system including a user device and a networked device for providing security and customization of the networked device. Example networked devices include IoT (Internet of Things) devices, such as electronics, software, sensors, network devices, and so on. In the disclosure, a user authenticates with the user device using a biometric. The user device transmits a user profile or settings information, optionally along with user biometric information, to the networked device…
Optical biometric sensor having diffractive optical elements
Granted: May 14, 2019
Patent Number:
10289891
An optical sensor for imaging a biometric object includes: a cover layer transparent to light reflected off the biometric object; an optical layer, disposed below the cover layer, having a plurality of diffractive optical elements; and a sensing layer, having a plurality of sensing elements disposed below the optical layer, each of the sensing elements being configured to detect light from the biometric object. The plurality of diffractive optical elements of the optical layer are…
Use fingerprint sensor signal to prevent device sleep
Granted: May 14, 2019
Patent Number:
10289885
Systems and methods for keeping a display screen active that include a fingerprint sensor coupled to a processing system and configured to perform a check for a presence of a finger. The processing system may be configured to alert an operating system to cause a display screen to be in an active state based on a detection of the finger; perform a future finger sense action to detect that the finger is still interacting with the fingerprint sensor; report to an operating system, based on…
Input object based increase in ground mass state
Granted: May 7, 2019
Patent Number:
10282021
Increasing ground mass state of an input device is disclosed. Increasing the ground mass state includes driving sensor electrodes to acquire first measurements of a sensing region of the input device, and driving a first subset of the sensor electrodes while a second subset is coupled to device ground to acquire second measurements of a portion of the sensing region. Increasing the ground mass state further includes determining a location of an input object in the sensing region using…
Initiating fingerprint capture with a touch screen
Granted: May 7, 2019
Patent Number:
10282579
A method for initiating fingerprint capture in an electronic device is described. The device includes a touch screen with a sensing region, a touch controller, a fingerprint controller, and a host. The device is placed in a low power doze mode where the fingerprint controller is in a low power state and the device scans for an object proximate to the sensing region. When an object is proximate to the sensing region, the device executes a validation mode to determine whether the object is…
Updating program code stored in an external non-volatile memory
Granted: May 7, 2019
Patent Number:
10282189
In a method of updating program code in an external non-volatile memory, updated program code is received at an Application Specific Integrated Circuitry (ASIC). The updated program code is received from a host device. The updated program code is stored in a volatile memory of the ASIC. The ASIC performs operations. The updated program code is copied from the volatile memory to a non-volatile memory while performing the operations. The non-volatile memory is located external to the ASIC.
Method and apparatus for constant response from shape memory alloy
Granted: April 30, 2019
Patent Number:
10275080
A method and apparatus for applying a current to a shape memory alloy of an actuator; determining a first resistance of the shape memory alloy; determining, after measuring the first resistance, a second resistance of the shape memory alloy; performing a comparison between the first resistance and the second resistance to detect a resistance change; and ceasing, based on detection of the resistance change, application of the current to the shape memory alloy.
Time sharing of display and sensing data
Granted: April 30, 2019
Patent Number:
10275070
This disclosure generally provides input devices, processing systems and methods for touch sensing that maintain substantially equal capacitive sensing frame reporting rates when operated at different display refresh rates.
CMOS inverter circuit that suppresses leakage currents
Granted: April 23, 2019
Patent Number:
10270363
An inverter circuit includes: a first P-channel MISFET having a source connected to a positive-side terminal and a drain connected to an output terminal; a first N-channel MISFET having a source connected to a negative-side terminal and a drain connected to the output terminal; a first delay element connected between a gate of the first P-channel MISFET and an input terminal to which an input signal is supplied; first switch element connected in parallel with the first delay element…
Optical fingerprint sensor under a display
Granted: April 23, 2019
Patent Number:
10268884
An optical sensor system includes: an input surface providing a sensing region for a biometric object; a plurality of display elements, disposed beneath the input surface, configured to emit light to provide a display; an aperture layer, disposed beneath the plurality of display elements; a collimator layer, disposed beneath the aperture layer; and a plurality of light sensing elements, disposed beneath the collimator layer, wherein the plurality of light sensing elements are configured…
Display guarding techniques
Granted: April 23, 2019
Patent Number:
10268313
Embodiments described herein mitigate the effect of a coupling capacitance between a sensor electrode in a touch sensor and a display electrode in a display screen. An input device, which includes the touch sensor and display screen, may transmit a guarding signal on the display electrodes when performing capacitive sensing. In one embodiment, the guarding signal may have similar characteristics as a modulated signal (e.g., similar amplitude and/or phase) driven on the sensor electrode…
Separating a compressed stream into multiple streams
Granted: April 16, 2019
Patent Number:
10262624
Embodiments of the invention generally provide a display device that includes a controller that is communicatively coupled between a display source and source drivers. The controller and source drivers include respective decompression engines that can decompress the compressed data received from the display source. Instead of sending all of the compressed data to the source drivers, the controller evaluates the uncompressed data and identifies what portion of the compressed data…
Systems and methods for spoof detection based on local binary patterns
Granted: April 16, 2019
Patent Number:
10262187
Disclosed are systems and methods for performing spoof detection. The method includes: receiving, by a processor from a biometric sensor, an input image of a biometric; analyzing the input image to identify pixels associated with a first feature in the input image; performing a local binary pattern (LBP) analysis on the pixels associated with the first feature, which comprises computing, for a given pixel associated with the first feature, an LBP value corresponding to texture of one or…
Mitigating audible noise in a display having an integrated touch sensor
Granted: April 16, 2019
Patent Number:
10261626
An example method of driving a display having a touch sensor includes: generating a plurality of display frames having an alternating sequence of display and blanking periods; supplying pixel line data to the display during the display periods and sensing signals to the touch sensor during the blanking periods; and timing the blanking periods so that display frames of a first type each have a first number of the blanking periods and that display frames of a second type each have a second…
Estimating force applied by an input object to a touch sensor
Granted: April 16, 2019
Patent Number:
10261619
Techniques for determining force applied by an input object in a sensing region of an input device are provided. The techniques generally include driving a plurality of sensor electrodes within a sensing region to acquire sensor data, generating a first histogram based on the sensor data, the first histogram including a plurality of bins each having an associated value, and based on the values associated with at least a subset of the plurality of bins of the first histogram, determining…
Operating a touch screen control system according to a plurality of rule sets
Granted: April 9, 2019
Patent Number:
10254878
A touch screen control system communicates with a host processing system (HPS). The touch screen control system includes a memory and control circuitry. The control circuitry operates a touch screen according to rules stored in the memory by: during a first time period and in response to detecting a first type of user input with a touch sensor of the touch screen, updating a display screen of the touch screen autonomously without requiring intervention from the HPS following the…
