Dynamic proximity object detection
Granted: August 13, 2019
Patent Number:
10379672
A method of dynamically adjusting a sensitivity of sensor electrodes configured for capacitive sensing in a sensing region of an input device. The input device detects a first input in the sensing region, and acquires force information about the first input via one or more force sensors coupled to the sensing region. The input device dynamically adjusts a sensitivity of the sensor electrodes based at least in part on an amplitude and duration of the force. In some aspects, the input…
Calibrating a continuous-time receiver for capacitive sensing
Granted: August 13, 2019
Patent Number:
10379668
Embodiments herein describe input devices that include receivers for sampling capacitive sensing signals. In one embodiment, the receivers perform continuous demodulation where the sampling of the capacitive sensing signal is not synchronized with the modulated signal applied to the sensor. To calibrate, the receiver generates first and second measurements of the capacitive sensing signal when driving a modulated signal onto one or more sensor electrodes during two respective time…
Bandgap reference circuitry
Granted: August 13, 2019
Patent Number:
10379567
Bandgap reference circuitry comprises a first current mirror connected to a power supply line and configured to supply a first current to a first node and a second current to a second node virtually-shorted to the first node, a first pn junction element between the first node and a ground line; a first variable resistor element between the second node and the ground line, and a second pn junction element connected in series to the first variable resistor element. The first variable…
Branch device bandwidth management for video streams
Granted: August 6, 2019
Patent Number:
10375349
Bandwidth management includes receiving, by a branch device, a requested display identification data structure from a display device. The branch device modifies the requested display identification data structure based on a total bandwidth through a constricted port on the branch device to obtain a modified display identification data structure. The branch device transmits the modified display identification data structure to a source device.
Semiconductor device
Granted: August 6, 2019
Patent Number:
10373862
Provided is a semiconductor device including an active region defined by a separation region on a main surface of a semiconductor substrate, and a field effect transistor formed in the active region. A boundary portion, over which a gate electrode pattern strides, is disposed in a boundary between the active region and the separation region and is configured such that a length of one side, in a direction of a gate length of the field effect transistor formed in the active region, becomes…
Device and method for display color adjustment
Granted: August 6, 2019
Patent Number:
10373584
A color adjustment circuit includes: a correction processing circuit configured to generate an output image data by performing color adjustment correction on an input image data; and a correction factor calculation circuit configured to calculate correction factors used for the color adjustment correction. The correction factor calculation circuit calculates a white color distance, a complementary color distance, and an elementary color distance and calculates the correction factors…
Reduced capacitive baseline shift via mixing period adjustments
Granted: August 6, 2019
Patent Number:
10372276
A method and related processing system and input device are disclosed, the method comprising driving a first capacitive sensing signal with first sensing frequency onto a first group of a plurality of sensor electrodes, and acquiring first capacitive measurements of resulting signals received by a second group of the plurality of sensor electrodes. Acquiring first capacitive measurements comprises applying a first demodulation signal with a predefined first mixing period defined within a…
Transcapacitive touch and force sensing in an input device
Granted: August 6, 2019
Patent Number:
10372259
An example input device for force and proximity sensing includes a plurality of touch electrodes including touch transmitter electrodes and touch receiver electrodes, and a force electrode layer including a plurality of force electrodes. The input device further includes a resilient material layer disposed between the plurality of touch electrodes and the force electrode layer. The input device further includes a processing system coupled to the plurality of touch electrodes and the…
Display device configured to operate display drive and touch sensing in time sharing manner and semiconductor device to be employed thereon
Granted: August 6, 2019
Patent Number:
10372248
The semiconductor device is intended for connection with an in-cell type display touch panel having a plurality of common electrodes, a reference voltage for display is applied to the common electrodes in a display drive period, and the common electrodes serve as sensor electrodes in a touch detection period. The semiconductor device includes a DC level shift circuit operable to shift the DC level of a toggle signal output by a toggle drive circuit to the reference voltage. The…
Dithering a clock used to update a display to mitigate display artifacts
Granted: July 30, 2019
Patent Number:
10366663
A display device can use clock dithering to spread the frequency spectrum of the clock signal (and the signals derived therefrom) to mitigate interference with other components or systems in a host device. However, dithering the clock signal can introduce display artifacts into the display device. For example, lines or rows in the display may flicker, the brightness of display lines may be non-uniform, or color shifts in displayed pixels. To reduce display artifacts, the embodiments…
Method and system for optical imaging using patterned illumination
Granted: July 30, 2019
Patent Number:
10366268
Systems and methods for optical imaging are disclosed. The systems and methods include a display for imaging an input object. The display includes a sensing surface; a plurality of display pixels; a plurality of detector pixels; and a processing system. The processing system is configured to determine a location of the input object relative to the sensing surface; illuminate one or more display pixels of the plurality of display pixels according to a pattern depending on the location of…
Force transfer element for edge force sensing
Granted: July 30, 2019
Patent Number:
10365818
An input device includes a deformable input surface and a force sensing layer disposed beneath the deformable input surface. The force sensing layer includes a plurality of force sensors to detect forces exerted by an input object on the deformable input surface. A force transfer layer is disposed between the deformable input surface and the force sensing layer. The force transfer layer is configured to transmit a force exerted by the input object in a first region of the deformable…
Reduced noise by performing processing during low-noise periods of interfering circuitry
Granted: July 30, 2019
Patent Number:
10365762
An input device, system, and processing system are disclosed for a display device with an integrated sensing device. The input device comprises a plurality of sensor electrodes, and a processing system coupled with the plurality of sensor electrodes. The processing system is configured to determine one or more low-noise periods associated with display update timing of the display device, and process, during the determined one or more low-noise periods, resulting signals received from the…
Capacitive sensing device with single reference channel
Granted: July 30, 2019
Patent Number:
10365749
An example a processing system for a capacitive sensing device includes a reference transmitter coupled to a reference capacitance. The processing system further includes a charge accumulation circuit having an input coupled to the reference transmitter through the reference capacitance and configured to generate an integrated signal, a demodulator circuit having an input coupled to an output of the charge accumulation circuit and configured to demodulate the integrated signal to…
Fingerprint sensor to support wake on finger and navigation
Granted: July 23, 2019
Patent Number:
10360428
An input device for capacitive sensing includes: a plurality of transmitter electrodes and a plurality of receiver electrodes. The input device is configured to: operate in a first mode by driving sensing signals onto each of the transmitter electrodes and receiving separate detected signals corresponding to each of the plurality of receiver electrodes; and operate in a second mode by driving a common sensing signal onto a plurality of the transmitter electrodes and receiving a common…
Optical fingerprint sensor with scattered light image detection
Granted: July 16, 2019
Patent Number:
10354116
A method and apparatus for authenticating a fingerprint image captured through an optical sensor. For at least some embodiments, light scattering characteristics associated with a fingerprint are determined and compared to a reference light scattering characteristic. The fingerprint is authenticated when the light scattering characteristics are within a threshold difference of the reference light scattering characteristic. For some embodiments, the light scattering characteristics…
Touch controller with signal combining and simultaneous I/Q demodulation
Granted: July 16, 2019
Patent Number:
10353518
An input device is configured to detect signals from of an input object. Examples include acquiring a first signal on a first sensor electrode of the input device; acquiring a second signal on a second sensor electrode of the input device; combining the first signal and the second signal to produce a combined signal; demodulating the combined signal to determine an in-phase component of the combined signal and a quadrature component of the combined signal; and combining the in-phase…
Touch sensing circuit and semiconductor device
Granted: July 16, 2019
Patent Number:
10352731
A touch sensing circuit operable to sense a conductor approaching a sensor capacitance by measuring a response signal obtained from the sensor capacitance according to an applied detection signal includes an A/D converter and a Fourier transform device. The A/D converter samples the response signal with a predetermined cycle, followed by conversion to a digital value and outputs as time-series response data. The Fourier transform device calculates, from the time-series response data, a…
Methods and systems for enrolling biometric data
Granted: July 9, 2019
Patent Number:
10346699
Methods and systems for enrolling biometric data that is easier to use and provides a more positive end user experience. Additionally, machine readable medium storing instructions configurable to achieve the results when executed by a computing device are also provided.
Semi-supervised system for multichannel source enhancement through configurable unsupervised adaptive transformations and supervised deep neural network
Granted: July 9, 2019
Patent Number:
10347271
Various techniques are provided to perform enhanced automatic speech recognition. For example, a subband analysis may be performed that transforms time-domain signals of multiple audio channels in subband signals. An adaptive configurable transformation may also be performed to produce single or multichannel-based features whose values are correlated to an Ideal Binary Mask (IBM). An unsupervised Gaussian Mixture Model (GMM) model fitting the distribution of the features and producing…
