Current steering structure with improved linearity
Granted: February 4, 2020
Patent Number:
10554216
Systems and methods are provided for improved linearity of audio amplifiers. In one example, a system includes a first current source configured to provide a first current signal having a first current source output capacitance, and a second current source configured to provide a second current signal having a second current source output capacitance, where the first and second current source output capacitances are a different value. The system further includes a first capacitor…
Hum reduction circuit and method
Granted: February 4, 2020
Patent Number:
10553192
Systems and methods according to one or more embodiments are provided for a hum reduction circuit implemented to provide a ground path between an audio generating device and a powered headset. In one example, a system includes a jack configured to accept a plug comprising a first electrical ground connection. The system also includes a switch coupled to the jack at a first end and coupled to second electrical ground connection at a second end. The system also includes the switch is…
Hybrid in-cell sensor topology
Granted: January 21, 2020
Patent Number:
10540043
An input device and associated processing system and method are disclosed. The input device comprises a lens layer, and a display device comprising a plurality of layers. The plurality of layers comprises a display activation layer. The input device further comprises a plurality of first sensor electrodes arranged with a first sensor pitch on a first layer of the plurality of layers, each first sensor electrode comprising at least one display electrode of a plurality of display…
Impedance ratio-based current conveyor
Granted: January 21, 2020
Patent Number:
10540042
An input device associated with a sensing region is disclosed. The input device includes: a first sensor electrode associated with the sensing region and configured to propagate a resulting signal; an first auxiliary component configured to generate an output using a scaled signal; and a first impedance ratio-based current conveyor coupled to the first sensor electrode and including: a staging circuit configured to generate an input signal using the resulting signal and a ratio of a…
Normalizing capacitive sensing measurements to reduce effects of low ground mass and noise
Granted: January 21, 2020
Patent Number:
10540035
An input device can be capacitive coupled to earth ground and noise sources which can interfere with the ability of the input device to detect an input object. To mitigate the effects from these capacitive couplings, the input device drives a modulated capacitive sensing signal onto a plurality of sensor electrodes in parallel. The sensor electrodes are coupled to respective analog front ends (AFEs) which generate an output signal for each of the sensor electrodes. The input device…
Force sensing in a touch display
Granted: January 21, 2020
Patent Number:
10540027
Embodiments described herein include a display device that includes a display substrate coupled to a frame. A stiffener substrate is also coupled to the frame. A first force sensing element is disposed on the stiffener substrate, and the stiffener substrate is disposed between the first force sensing element and the display substrate. The display device also includes a second force sensing element, where a distance between the first force sensing element and the second force sensing…
Display device having an integrated sensing device with improved proximity sensing
Granted: January 14, 2020
Patent Number:
10534485
Embodiments described herein include a method and apparatus for capacitive sensing in input devices integrated with a display device. In one example, an input device is provided that includes a display device, a plurality of transmitter electrodes integrated with the display device, and a processing system. The plurality of transmitter electrodes include at least a first transmitter electrode and a second transmitter electrode. The first transmitter electrode includes a plurality of…
Zero-dimensional baseline management
Granted: January 14, 2020
Patent Number:
10534484
A processing system includes sensor circuitry configured to obtain capacitive sensing signals from sensor electrodes, the sensor electrodes having baseline values, such that each sensor electrode has a corresponding baseline value. The processing circuitry is configured to be connected to the sensor circuitry and configured to determine, for the corresponding baseline value of a sensor electrode, a spatial consistency metric value using the various baseline values, set a baseline…
Force sensing resistor (FSR) with capacitive sensing
Granted: January 14, 2020
Patent Number:
10534473
An input device includes a sensor apparatus coupled to a sensing region. The sensor apparatus is operable in at least a first mode or a second mode. When operating in the first mode, the input device is configured to detect a capacitance of the sensor apparatus. When operating in a second mode, the input device is configured to detect a resistance of the sensor apparatus. The input device is further configured to process user inputs in the sensing region based at least in part on the…
Interference monitoring with transmitter electrodes
Granted: January 7, 2020
Patent Number:
10530363
A method of capacitive sensing may include transmitting a first sensing signal along a first transmitter electrode among various transmitter electrodes of an input device. The method may further include obtaining, using various receiver electrodes in the input device, a first resulting signal in response to the first sensing signal being transmitted along the first transmitter electrode. The method may further include obtaining a second resulting signal from a second transmitter…
Oscillator temperature coefficient adjustment
Granted: January 7, 2020
Patent Number:
10530296
An oscillator circuit is disclosed. The oscillator circuit includes: oscillator transistors including gates; adjustment transistors coupled to the gates; a differential output coupled to the oscillator transistors; a switch configured to set an oscillation frequency of the differential output by driving: a first current including a first portion of a main current through at least one of the oscillator transistors; and a second current including a second portion of the main current…
Biometric template updating systems and methods
Granted: January 7, 2020
Patent Number:
10528791
Systems and methods for updating an enrollment template having a plurality of enrollment views of a biometric input object. A determination is made as to whether a new input biometric view is a candidate view for template update based on a match criterion, and a determination is made as to whether the new input biometric view increases coverage of the biometric input object by the enrollment template. The new input biometric view is added to the enrollment template as a new enrollment…
Device and method for color reduction with dithering
Granted: December 31, 2019
Patent Number:
10522068
Techniques for displaying a quality-improved image with reduced power consumption are provided. In one embodiment, a display panel driver is provided that includes a dithering section configured to receive first m-bit image data and configured to generate second image data by performing dithering on the first image data with n-bit dither values each selected from elements of a dither table, and a driver circuit configured to drive the source lines of a display panel in response to the…
Apparatus and method for adjusting display characters of display device
Granted: December 31, 2019
Patent Number:
10522067
A display panel driver includes an image data generator, a brightness correction circuit performing a correction calculation on image data, a drive section driving the display panel in response to corrected image data; and a display timing generator outputting a timing control signal. The correction calculation by the brightness correction circuit is adjustable. When the display panel driver is placed into a test mode, the display timing generator is configured to output an…
3D interactive system
Granted: December 31, 2019
Patent Number:
10521052
A processing system is provided. The processing system includes: a sensor module configured to obtain a first image including a first reflected view of an input object within a sensing region associated with an input surface; and a determination module configured to: determine a first position of the input object within the first image; and determine a distance of the input object from the input surface using the first position.
Position based jitter removal
Granted: December 31, 2019
Patent Number:
10521051
An input device (100) is configured to detect force being applied to an input region (120) of the device (100) by an input object (140), in addition to the position of the input object (140) using touch sensing methods. The input device (100) applies a position-based jitter force filter to the force sensor data to compensate for a non-uniform response across the input device (100), as well as the movement of an input object (140).
Correction of current measurement in an amplifier
Granted: December 24, 2019
Patent Number:
10516955
Systems and methods according to one or more embodiments are provided for correcting a current measurement through a speaker in an audio system. In one example, a system for driving a speaker includes an output stage configured to drive a current through the speaker. The system further includes a first and second current sensor coupled to the output stage and configured to measure a positive current including a first measurement error and a negative current including a second measurement…
Touch detection circuit, touch detection program and touch detection method
Granted: December 17, 2019
Patent Number:
10509508
Provided is a touch sensing circuit configured to sense an approach of a conductive object toward a sensor capacitor through measuring a sensor response signal generated by the sensor capacitor in response to a sensing wave signal applied to the sensor capacitor. The touch sensing circuit is connectable to a conversion circuit and a touch detection circuit. The conversion circuit calculates a response signal vector for a frequency component of the sensing wave signal by converting the…
Device and method for image enlargement and display panel driver using the same
Granted: December 17, 2019
Patent Number:
10510138
A display panel driver includes a scaler circuit performing image enlargement processing on input image data corresponding to an input image to generate ?-times enlarged image data corresponding to an ?-times enlarged image (? is a number larger than one which cannot be represented as 2k); and a driver section driving a display panel. In calculating a pixel value of a target pixel of the ?-times enlarged image, the scaler circuit generates enlarged image data including 2n-times enlarged…
System and method for communication in a semiconductor device
Granted: December 17, 2019
Patent Number:
10509595
A semiconductor device including a first data terminal, a data output terminal, a control circuitry, first and second communication interfaces, and a bridge circuitry. The bridge circuitry is configured to operate a normal mode and a bridge mode. In the normal mode, the data output terminal is connected to the second communication interface circuitry, and in the bridge mode, the first data terminal is connected to the data output terminal in a bridge mode.
