Three layer force pad
Granted: December 29, 2020
Patent Number:
10880990
A force pad sensor includes a face sheet including a force sensing resister, and a printed circuit board assembly. The printed circuit board assembly includes a proximity sensor layer including a proximity receiver electrode and a proximity transmitter electrode, and a force sensor layer including a force receiver electrode and a force transmitter electrode. The force receiver electrode and the FSR intersect a same vertical plane, the vertical plane being perpendicular to the face sheet.
Display drive circuit
Granted: December 22, 2020
Patent Number:
10872555
A circuit apparatus is provided for driving source electrodes of a display panel based on image data and to control a backlight of the display panel. For example, the circuit apparatus includes a display drive (DD) circuit having a parameter generation (PG) part and an image data conversion (IDC) part. The PG part is operable to generate an image data-conversion parameter and a backlight control parameter based on a brightness distribution of the image data of one frame. The IDC part is…
Device and method for subpixel rendering
Granted: December 22, 2020
Patent Number:
10872552
A display driver comprises: subpixel rendering (SPR) circuitry configured to use, in SPR, predetermined regions which fall within two lines of input subpixels of an input image; buffer memory circuitry configured to store first subpixel data for a plurality of first subpixels of the input subpixels, wherein the plurality of the first subpixels each are encompassed in the predetermined regions; and a register configured to store coefficients, wherein the coefficients respectively…
Fast finger settlement detection for fingerprint sensors
Granted: December 15, 2020
Patent Number:
10867150
Low power input object settlement detection systems and methods for operating a capacitive sensor having a plurality, M, of transmitter electrodes and a plurality, N, of receiver electrodes, wherein N and M are integer values. A plurality of input object settlement scans are captured, when a presence of an input object is detected, or in response to a presence of an input object being detected, wherein capturing each input object settlement scan includes driving all or a portion of the…
Display driver with reduced voltage droop
Granted: December 1, 2020
Patent Number:
10854158
A system and method for updating a display device comprises a first charge pump configured to drive a first gate line of the display device with a first voltage during a first period, a second charge pump configured to transition the first gate line from the first voltage to a second voltage during a second period, a third charge pump configured to drive the first gate line with the second voltage during a third period, and a fourth charge pump configured to transition the first gate…
Display device having reduced interference
Granted: December 1, 2020
Patent Number:
10852887
A system and method for reducing electromagnetic interference of a display device. The display device may have a plurality of gate electrodes and a plurality of common electrodes. Further, the display device includes a processing system that is configured to drive a first gate electrode of a plurality of gate electrodes of the display device with a first gate select signal to select first subpixels for updating during a first period. The processing system further comprises driving a…
Low power lattice wave filter systems and methods
Granted: November 24, 2020
Patent Number:
10848131
Systems and methods for low power lattice wave filters include an input operable to receive a digital input signal having a first sample rate, a first processing branch including a first delay element operable to receive the digital input signal and output a delayed digital input signal, a second processing branch including a first adder operable to receive the digital input signal and subtract a delayed feedback signal to produce a difference signal, a second adder operable to combine…
Movement and presence detection systems and methods using sonar
Granted: November 24, 2020
Patent Number:
10845479
A method for detecting presence of a person includes emitting, by a speaker of a device, a plurality of ultrasonic ping signals, receiving, by a microphone of the device, a plurality of reflected ultrasonic ping signals, and processing the received reflected signals to determine a presence of a person within a predetermined distance of the device. The processing includes determining changes in the reflected signals relative to the emitted signals by generating an impulse response by…
Display noise filter for a sensing device
Granted: November 17, 2020
Patent Number:
10838547
An input device comprises a plurality of sensor electrodes and a processing system coupled to the plurality of sensor electrodes. The processing system comprises a sensor driver. The sensor driver comprises clock synchronization circuitry, a blocking pulse generator, and a sensor module. The clock synchronization circuitry is configured to receive an external clock signal, and synchronize an internal clock signal with the external clock signal. The blocking pulse generator is configured…
Low power current steering digital-to-analog converter
Granted: November 17, 2020
Patent Number:
10840927
Systems and methods according to one or more embodiments provide a low power current steering digital-to-analog converter. In one example, a device includes a current cell including a plurality of switches. The device further includes a current cell controller configured to selectively operate the plurality of switches. The plurality of switches is selectively operated to cause the current cell to generate a current signal in response to a first data signal. The plurality of switches is…
Amplifier flicker noise and offset mitigating systems and methods
Granted: November 10, 2020
Patent Number:
10833642
A system includes an amplification circuit and offset calibration circuit. The amplification circuit includes a modulation circuit operable to modulate a received signal, an amplifier operable to amplify the modulated signal, and a modulation circuit operable to demodulate the amplified signal. The offset calibration circuit includes a logic circuit operable to set a control signal and adjust the control signal based on an output of the amplification circuit, where the output is based on…
Power device structure with improved reliability and efficiency
Granted: November 10, 2020
Patent Number:
10833083
Systems and methods according to one or more embodiments are provided for improved reliability and efficiency of high side power stage output drivers used in switching amplifiers. In one example, a system includes a power device structure comprising an nwell structure formed within a semiconductor p substrate and a pwell structure formed within the nwell structure. The system further includes one or more NMOS electronic power devices formed on the pwell structure and a pwell guardring…
Sensor patterning with reduced trace visibility for capacitance sensing
Granted: November 10, 2020
Patent Number:
10831325
An input device includes a first electrode layer including electrodes, a second electrode layer including electrodes, an insulating layer disposed between the first and the second electrode layers, and capacitive sensing elements organized in rows and columns. Each of the capacitive sensing elements is formed by one of the electrodes in the first electrode layer and one of the electrodes in the second electrode layer. A set of the capacitive sensing elements organized in adjacent rows…
Ohmmeter for sensor electrodes
Granted: November 10, 2020
Patent Number:
10831323
An input device includes a plurality of sensor electrodes and a processing system that is operable in at least a first mode or a second mode. The processing system is configured to receive an input current from a pair of the sensor electrodes. When operating the first mode, the processing system is configured to measure a capacitance across the pair of sensor electrodes based on the received input current. When operating the second mode, the processing system is configured to measure a…
Self-referenced capacitive force sensor
Granted: November 10, 2020
Patent Number:
10831320
A force sensing apparatus includes a first layer having a first electrode disposed thereon, a second layer having a second electrode disposed thereon, and a spacer layer configured to transfer an input force exerted on the first layer to the second layer. The spacer layer causes a change in a separation distance between the first electrode and the second electrode in response to the input force. The force sensing apparatus further includes processing circuitry to detect a change in…
Backward compatibility for audio systems and methods
Granted: November 3, 2020
Patent Number:
10827271
A system includes a logic device configured to cause the system to perform operations. The operations include requesting, from a peripheral device coupled to a host device, a device descriptor of the peripheral device, receiving, from the peripheral device, the device descriptor including at least two configurations. A first configuration includes an audio communications protocol having a plurality of selectable audio bit-rates and a second configuration including a plurality of…
Gate select signal with reduced interference
Granted: November 3, 2020
Patent Number:
10825373
A processing system for a display device comprises a display driver configured to generate a gate select signal and output the gate select signal to gate select control circuitry to be driven on gate lines for display updating. The gate select signal comprises a transition from a first voltage to a second voltage, a transition from the second voltage to a third voltage, and a transition from the third voltage to the first voltage. The second voltage is greater than the first voltage and…
Display device with integrated fingerprint sensor
Granted: November 3, 2020
Patent Number:
10824276
A fingerprint sensing device integrated within a display device. The display device comprises source lines, monitor lines, gate lines, select lines, and subpixels. A first subpixel comprises first subpixel circuitry coupled to a first source electrode, a first monitor line, and a first gate line, and a first photodiode circuitry coupled to a first select line. The display device further comprises measurement circuitry coupled to the first subpixel via the first monitor line. The…
Sigma-delta configurations for capacitance sensing
Granted: October 27, 2020
Patent Number:
10816582
An input device includes a clocked comparator configured to actively drive a capacitive sensor electrode at a signal input of the clocked comparator with a first periodic reference voltage, and provide a digital representation of a sensing current resulting from driving the capacitive sensor electrode with the first periodic reference signal. The clocked comparator produces the digital representation of the sensing current based on a comparison of the signal input of the clocked…
Device and method for driving display panel
Granted: October 20, 2020
Patent Number:
10810922
A display driver comprises a digital-to-analog converter (DAC) configured to output a grayscale voltage corresponding to an image data. The display driver further comprises a source amplifier configured to drive a source line of a display panel, and a buffer connected between the DAC and the source amplifier. The buffer comprises a first NMOS transistor having a gate supplied with the grayscale voltage and a drain connected to a power supply. The buffer is configured to supply a current…
