Device and method for driving liquid crystal display panel
Granted: February 26, 2019
Patent Number:
10217433
A driver includes a temperature sensor, a drive circuitry configured to drive a source line of a liquid crystal display panel, and a precharge circuitry configured to perform a precharge operation of the source line. When a measured temperature by the temperature sensor is in a first temperature range, the precharge circuitry selectively performs the precharge operation of the source line in response to the grayscale level indicated by the image data. When the measured temperature is in…
Delta sigma modulator systems and methods
Granted: February 19, 2019
Patent Number:
10211848
Systems and methods according to one or more embodiments are provided for improving noise performance in a delta sigma modulator comprising an adder, quantizer and nth order filter. The adder is operable to receive an input signal and a feedback signal, and output a modified input signal. The quantizer is operable to receive the modified input signal and output a quantized output signal, the quantized output signal having a corresponding quantization error. The nth order filter is…
System and method for interference avoidance for a display device comprising an integrated sensing device
Granted: February 19, 2019
Patent Number:
10209845
Embodiments of the invention generally provide an input device with display screens that periodically update (refresh) the screen by selectively driving electrodes corresponding to pixels in a display line. In addition to updating the display, the input device may perform capacitive sensing using the display screen as a touch area. To do this, the input device uses common electrodes for both updating the display and performing capacitive sensing, and interleaves periods of capacitive…
Touch detecting device and semiconductor device
Granted: February 19, 2019
Patent Number:
10209835
A touch panel controller is provided with a calibration circuit that performs offset adjustment with respect to input signals of a plurality of detection circuits corresponding to a plurality of X electrodes of the touch panel, and a storage device that stores first parameter data that specifies an offset adjustment operation of the calibration circuit, and second parameter data for correction for the first parameter data.
Interference detection
Granted: February 12, 2019
Patent Number:
10203809
An input device including: a first in-phase touch sensing block including: an analog mixer configured to mix a resulting signal associated with a capacitive sensor electrode with a local oscillator (LO) signal; an analog to digital converter (ADC) configured to convert an output of the analog mixer into a digital signal; and a first decimation filter configured to determine an in-phase component of an interference at a frequency of the LO signal based, at least in part, on the digital…
Low ground mass artifact management
Granted: February 12, 2019
Patent Number:
10203806
A processing system for a capacitive sensing device includes a sensor module and a determination module. The sensor module is coupled to transmitter electrodes and receiver electrodes. The sensor module is configured to transmit transmitter signals with the transmitter electrodes and receive resulting signals with the receiver electrodes. The resulting signals include effects corresponding to the transmitter signals. The determination module is configured to determine response values…
Inflection based calibration method for force detector
Granted: February 5, 2019
Patent Number:
10198133
Embodiments described herein include a method for calibrating capacitive force sensors. The method includes acquiring a plurality of changes of capacitance at a plurality of sensor electrodes in a capacitive sensor, where the plurality of changes of capacitance represents a force. The method also includes identifying a plurality of inflection points in the plurality of changes of capacitance, where each of the plurality of inflection points bounds a region of modeling. The method…
Force sensor recalibration
Granted: February 5, 2019
Patent Number:
10198125
Embodiments described herein include a method for calibrating capacitive force sensors. The method includes measuring a force level at each of a first electrode and a second electrode. The method also includes determining an expected force level at the second electrode based on the measured force level at the first electrode and a force contribution ratio for the second electrode. The method includes determining a difference between the measured force level at the second electrode and…
Device and method for image enlargement and display panel driver using the same
Granted: January 29, 2019
Patent Number:
10192286
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…
Voltage triggered edge insensitive protection circuit
Granted: January 29, 2019
Patent Number:
10193338
Embodiments of disclosure generally relate to integrated circuits (ICs) and, more particularly, a voltage-triggered edge-insensitive electrostatic discharge (ESD) clamp for protection of ICs. An example trigger circuit is provided for controlling a current shunt in an IC. The trigger circuit generally includes a comparison circuit configured to compare a monitored voltage to a reference voltage and output a signal indicating when the monitored voltage reaches or exceeds the reference…
Modulating a reference voltage to preform capacitive sensing
Granted: January 29, 2019
Patent Number:
10191597
This disclosure generally provides an input device modulates a reference voltage used to provide power to a plurality of power supplies and acquires, while modulating the reference voltage, first resulting signals from a plurality of sensor electrodes simultaneously at a central receiver. In input device also acquires second resulting signals from the sensor electrodes at a plurality of local receivers and mitigates an effect a grounding condition has on the second resulting signal using…
Reducing connections from a sensing module
Granted: January 29, 2019
Patent Number:
10191584
An input device, including: a first glass layer; a plurality of transmitter electrodes disposed on the first glass layer and configured for capacitance sensing; a second glass layer; a plurality of receiver electrodes disposed on the second glass layer and configured for capacitance sensing; and a multiplexer disposed on the first glass layer and coupled to a plurality of sources and a sensing channel, where the multiplexer selectively couples one of the plurality of sources to the…
Optical fingerprint sensor package
Granted: January 22, 2019
Patent Number:
10185866
Disclosed are optical sensors, optical fingerprint sensor packages, and methods for forming same. An optical sensor comprises: a substrate; an image sensor disposed over the substrate; a light source disposed over the substrate; a light guide disposed over the image sensor; and, an encapsulant disposed over the light source, wherein the encapsulant is coupled to the light guide and comprises a surface positioned to reflect light emitted from the light source and direct the reflected…
Device and method for localized force sensing
Granted: January 22, 2019
Patent Number:
10185427
A device and method for operating a capacitive input device configured to sense input objects and their applied force in a sensing region includes a pliable component having an input surface and a first substrate including a first plurality of sensor electrodes. The device also includes a support substrate spaced apart from the pliable component; a second substrate having a second plurality of sensor electrodes and a plurality of apertures; and a spacing layer disposed between the…
Impulse response filtering of code division multiplexed signals in a capacitive sensing device
Granted: January 15, 2019
Patent Number:
10181872
An example method of capacitive sensing includes: receiving at least one code division multiplexed (CDM) signal transmitted from different transmitters using different codes over a plurality of signal bursts, wherein a length of each of the different codes is equal to or greater than a number of the different transmitters; filtering the at least one CDM signal using an impulse response filter, wherein the filtering comprises: accumulating the at least one CDM signal over the plurality of…
Low profile illumination in an optical fingerprint sensor
Granted: January 15, 2019
Patent Number:
10181070
An optical fingerprint sensor includes: cover glass for receiving a finger; a transparent electrode layer below a bottom surface of the cover glass; an organic light emitting diode layer (OLED) below the transparent electrode layer; and a metal electrode layer below the OLED layer. Multiple openings extend through each of the transparent electrode layer, OLED layer, and metal electrode layer, and transmit reflected light reflected from a top surface of the cover glass when a finger is…
Pen with inductor
Granted: January 15, 2019
Patent Number:
10180736
A processing system includes a sensor module and a determination module. The sensor module is coupled to sensor electrodes and is the sensor module configured to drive the sensor electrodes with sensing signals at a first resonance frequency of the pen. The determination module is configured to obtain, concurrently with the driving of the sensor electrodes, a measurements that are based on effects of the sensing signals, and a resonance of the pen in a sensing region. The determination…
Detecting an active pen using a capacitive sensing device
Granted: January 8, 2019
Patent Number:
10175827
In an example, a processing system for an integrated display and capacitive sensing device includes a sensor module and a determination module. The sensor module includes sensor circuitry configured to be coupled to a plurality of sensor electrodes. The sensor module is configured to receive an active pen signal with at least one sensor electrode of the plurality the sensor electrodes. The determination module is configured to adjust a sensing period of the sensor module for alignment…
Optical sensor for integration in a display
Granted: January 8, 2019
Patent Number:
10176355
Systems and methods for optical imaging are disclosed. An optical sensor for imaging a biometric input object on a sensing region includes a transparent layer having a first side and a second side opposite the first side; a first set of apertures disposed above the first side of the transparent layer; a reflective layer disposed below the second side of transparent layer configured to receive light transmitted through the first set of apertures and to reflect the received light; and a…
Adaptive force sensing
Granted: January 8, 2019
Patent Number:
10175833
A method of operating a force-sensitive input device having an input surface comprises declaring a first press action upon detecting an amount of force applied to the input surface that exceeds a first no-press force value by at least a first press threshold value, determining a maximum force value applied to the input surface during the first press action, and setting a release threshold value for a subsequent release action based on the determined maximum force value.
