Edge-effect mitigation for capacitive sensors
Granted: July 2, 2019
Patent Number:
10338754
An input device for capacitive sensing includes: a plurality of sensor electrodes, the plurality of sensor electrodes comprising a plurality of transmitter electrodes and a plurality of receiver electrodes, wherein the plurality of transmitter electrodes is configured to be driven by sensing signals and the plurality of receiver electrodes is configured to receive detected signals corresponding to respective sensing signals driven onto the plurality of transmitter electrodes; a plurality…
Reducing background capacitance associated with a touch surface
Granted: July 2, 2019
Patent Number:
10338740
A processing system for reducing background capacitance associated with a touch surface. The processing system includes: transmitter circuitry that drives a transmitter electrode of the touch surface with a waveform; receiver circuitry that detects input in a sensing region of the touch surface based on a resulting signal from a receiver electrode of the touch surface; and offset reduction circuitry connected to the receiver circuitry that: subtracts, prior to completion of an…
Likelihood detection of pressing finger in two-finger touch
Granted: July 2, 2019
Patent Number:
10338718
A processing system for a force sensing device, including: sensor circuitry that receives resulting signals from force sensors; and processing circuitry that: determines a first location of a first input object and a second location of a second input object on a surface; determines force values for the force sensors based on the resulting signals; obtains a first plurality of expected force values for the force sensors based on the first location and a second plurality of expected force…
High-speed current comparator suitable for nano-power circuit design
Granted: June 25, 2019
Patent Number:
10333506
Systems and methods according to one or more embodiments are provided for a current comparator with biasing circuitry to provide for low power consumption and high-speed performance. In one example, a system includes an input port to receive a current pulse and an amplifier configured to provide a voltage pulse at an output port in response to the current pulse. The system also includes a first biasing circuit coupled between the output port and the input port to selectively limit a…
Stabilizing high performance audio amplifiers
Granted: June 25, 2019
Patent Number:
10333473
Systems and methods are provided for improved stability of audio amplifiers that incorporate external speaker connectivity. In one example, a system includes an audio amplifier circuit comprising two or more amplifier stages and a stability resistor and configured to receive an audio input signal, the audio amplifier circuit configured for at least two modes of operation, a first mode having a high input transconductance and the stability resistor is coupled to an output of the audio…
Display driver and display panel module
Granted: June 25, 2019
Patent Number:
10332442
Provided is a display driver which can be used in common in any of COF mounting and COG mounting. In the display driver, a position (or write/output position) of display data output by an output circuit can be changed along a direction of an array of external output terminals S1 to S540 according to mode data, whereby an array of external output terminals to use for output can be selected from more than one kind of arrays different in layout pitch. Therefore, the display driver can be…
Method and device for display color adjustment
Granted: June 25, 2019
Patent Number:
10332437
Provided is a color adjustment method for a display apparatus. The color adjustment method includes: measuring first luminance coordinate data indicating a luminance and color coordinates of a color displayed on a display device when image data corresponding to a white point is supplied to a drive circuitry; measuring second luminance coordinate data indicating luminances and color coordinates of colors displayed on the display device when image data corresponding to the white color of…
Active matrix capacitive fingerprint sensor for display integration based on charge sensing by a 2-TFT pixel architecture
Granted: June 18, 2019
Patent Number:
10325131
Embodiments described herein include an input device including an array of sensing pixels configured to sense an input object in a sensing region, each of the sensing pixels including a sense element. Each of the sensing pixels also includes a first transistor, wherein the first transistor includes a gate terminal connected to a row select line and a second terminal connected to the sense element. Each of the sensing pixels also includes a non-linear circuit element, wherein the…
Oscillator circuit with low dropout regulator
Granted: June 18, 2019
Patent Number:
10326402
A circuit includes: an oscillator configured to generate an oscillation clock signal; an NMOS transistor having a source connected with a power terminal of the oscillator, and a drain connected with a first power supply line to which a first power supply voltage is supplied; an operational amplifier configured to control a gate voltage of the NMOS transistor based on a voltage of the power terminal of the oscillator; and a charge pump. The charge pump is configured to use the oscillation…
Fingerprint sensor and button combinations and methods of making same
Granted: June 18, 2019
Patent Number:
10325132
It will be understood by those skilled in the art that there is disclosed in the present application a biometric sensor that may comprise a plurality of a first type of signal traces formed on a first surface of a first layer of a multi-layer laminate package; at least one trace of a second type, formed on a second surface of the first layer or on a first surface of a second layer of the multi-layer laminate package; and connection vias in at least the first layer electrically connecting…
Method and system for input object separation using pixel response functions
Granted: June 18, 2019
Patent Number:
10324576
A method may include obtaining a capacitive image of various sensor pixels in an input device. The capacitive image may include various capacitive measurements resulting from the first input object and the second input object in a sensing region of the input device. The method may further include obtaining various pixel response functions corresponding to the sensor pixels. The method may further include determining, from the capacitive image and using a search method and the pixel…
Methods and systems for matrix electrode arrays
Granted: June 11, 2019
Patent Number:
10318084
An input device may include a matrix electrode array that includes various transmitter electrodes and various receiver electrodes. The transmitter electrodes may be disposed in a first direction. The receiver electrodes may be disposed in a second direction that is substantially parallel with the first direction. The input device may further include a first set of routing traces coupled to the transmitter electrodes and disposed underneath the transmitter electrodes in the first…
Display control and touch detection device, semiconductor integrated circuit
Granted: June 11, 2019
Patent Number:
10318052
A display control and touch detection device is capable of controlling display and non-display terms in start timing depending on a result of touch detection, and includes a nonvolatile memory and a control logic which selectively uses data stored in the memory according to a display mode. The control logic changes the display and non-display terms in start timing in display frame periods, whereby the phenomenon of appearance of an undesired brightness difference at a fixed location in a…
Under display optical fingerprint sensor arrangement for mitigating moiré effects
Granted: June 4, 2019
Patent Number:
10311276
A system and method for an electronic device for imaging a biometric object having structural features of interest is disclosed. The electronic device includes a display including rows of pixel elements, the rows of pixel elements being parallel a first primary direction along a first axis and an optical sensor mounted underneath the display, the optical sensor being parallel to a second primary direction along a second axis. The second axis is rotated at an angle relative the first axis…
Device and method for skew compensation between data signal and clock signal
Granted: May 28, 2019
Patent Number:
10305709
A semiconductor device includes first and second buffers respectively outputting reception data and clock signals; a latch circuit latching the reception data signal in response to the reception clock signal; a delay circuitry delaying the reception clock signal by a set delay time; and a delay control circuitry which searches a first delay time while increasing the set delay time from an initial value; searches a second delay time while increasing the set delay time from the first delay…
Display integrated optical fingerprint sensor with angle limiting reflector
Granted: May 28, 2019
Patent Number:
10303919
An optical sensor for imaging an input object, such as a fingerprint, on a sensing region of a display is disclosed. The sensor includes a transparent substrate having a first side and a second side opposite the first side. An array of detector elements is positioned above the first side of the transparent substrate and an angle limiting reflector is positioned below the second side of the transparent substrate. The angle limiting reflector is configured to reflect light incident on the…
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…
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.…
