Dynamic rescan to reduce landing artifacts
Granted: June 8, 2021
Patent Number:
11029780
A method and apparatus for dynamically rescanning an array of sensor electrodes of an input device. The input device performs a first scan of the array over a plurality of iterations to acquire a frame of sensor data, where a different subframe of the sensor data is acquired from each iteration of the first scan. During each iteration of the first scan, the input device compares the subframe of sensor data acquired from the iteration with a respective subframe of sensor data acquired…
Capacitive sensing active electromagnetic emission cancellation
Granted: June 8, 2021
Patent Number:
11029349
An input device is disclosed that provides reduced electromagnetic emissions while detecting the presence of an input object. In one embodiment, a first set of sensor electrodes is driven with a first modulated signal while a second set of sensor electrodes is driven with a second set of modulated signals that is based on an inverted first modulated signal. The first set of sensor electrodes may determine a capacitance value while the second set of sensor electrodes may reduce…
Display driver with gamma correction
Granted: June 1, 2021
Patent Number:
11024236
A system and method for controlling the screen brightness of a display comprising calculating a brightness data which specifies a screen brightness level of a self-luminous display panel, determining, based on the brightness data, correction control points, calculating an output value from the input grayscale value with input-output characteristics specified by the correction control points.
Event-based media playback
Granted: May 25, 2021
Patent Number:
11017818
A method and apparatus for event-based media playback. A media device infers one or more actionable events in a media content item using one or more neural network models and determines a respective start location for each of the actionable events in the media content item. The media device receives user input indicating a selection of one of the actionable events and selectively initiates playback of the media content item at the start location associated with the selected actionable…
Systems and methods for spoof detection based on local binary patterns
Granted: May 25, 2021
Patent Number:
11017204
Disclosed are systems and methods for performing spoof detection. The method includes: receiving, by a processor from a biometric sensor, an input image of a biometric; analyzing the input image to identify pixels associated with a first feature in the input image; performing a local binary pattern (LBP) analysis on the pixels associated with the first feature, which comprises computing, for a given pixel associated with the first feature, an LBP value corresponding to texture of one or…
Defensive measures for residue re-imaging
Granted: May 18, 2021
Patent Number:
11010589
An input device includes a biometric sensor and a processing system. The biometric sensor is configured to capture images of a sensing region of the input device. The processing system is configured to acquire a first image of the sensing region in response to a first authentication trigger, and to acquire a second image of the sensing region in response to a second authentication trigger. The processing system is further configured to determine an amount of similarity between the first…
Sequenced illumination of nearby object with cue marks
Granted: May 18, 2021
Patent Number:
11010585
Systems and methods for optical imaging are disclosed. An optical sensing system, including a display, an optical sensor, and a processor communicatively coupled to the display and the optical sensor is provided. The processor is configured to execute an input object image capture method. The method determines that an input object is proximate to an optical sensing region of the display, and in response to determining that an input object is proximate to the sensing region of the…
Method and system for alternative absolute profile determination
Granted: May 18, 2021
Patent Number:
11010006
The invention relates to a processing system. The processing system includes a sensor module performing a first measurement to obtain a combination signal using a first sensor electrode and a second sensor electrode. The first electrode is driven using a first modulated signal with a first driving voltage amplitude and simultaneously the second electrode is driven using a second modulated signal with a second driving voltage amplitude greater than the first driving voltage amplitude,…
Using electrical resistance to estimate force on an electrode during temperature changes
Granted: May 18, 2021
Patent Number:
11009988
A processing system including processing circuitry and sensor circuitry configured to obtain first resistance measurements of a plurality of sensor electrodes that compose a surface of an input device. The processing circuitry measures, in a first time interval, first values of electrical resistances of the electrodes. The processing circuitry calculates, from the first values, a first rate of change in the resistances, and measures, in a subsequent second time interval, second values of…
Semiconductor integrated circuit adapted to scan testing, and method of designing the same
Granted: May 11, 2021
Patent Number:
11005458
A semiconductor integrated circuit comprises a scan flipflop comprising a scan input and a data input; and scan control circuitry. The scan control circuitry is configured to control the scan flipflop to capture a value inputted to the scan input in a capture mode.
System and method for optical sensing
Granted: May 11, 2021
Patent Number:
11004883
A processing system for an optical sensing device may comprise receiver circuitry and a determination module. The processing system may also include drive circuitry configured to drive a light source to emit light. The receiver circuitry is coupled to a photodetector, and the receiver circuitry is configured to acquire a resulting signal from the photodetector, and generate a measurement of light received by the photodetector based on the resulting signal. The receiver circuitry includes…
Partial guarding for a sensing device
Granted: May 11, 2021
Patent Number:
11003300
A system and method for operating sensor electrodes comprises driving, during a first period, a first portion of the sensor electrodes with a sensing signal. A second portion of the sensor electrodes is driven with a guarding signal during the first period. The second portion is adjacent to the first portion. The guarding signal and the sensing signal have at least one characteristic in common that is selected from a group consisting of amplitude, phase, and frequency. A third portion of…
Semiconductor device having a communication bus
Granted: May 11, 2021
Patent Number:
11003291
A semiconductor device for an input device comprises a die body comprising sensor circuitry, a plurality of pads and a sensor bus. The sensor circuitry is configured to operate a plurality of sensor electrodes disposed in a single layer for capacitive sensing. A first pad of the plurality of pads is configured to be coupled to a first sensor electrode of the plurality of sensor electrodes, a second pad of the plurality of pads is configured to be coupled to a second sensor electrode of…
Active input sensing using regional scanning
Granted: May 11, 2021
Patent Number:
11003288
Aspects described herein include a method and associated input device and processing system. The method comprises dividing a sensing region into a plurality of regions. The sensing region is defined by a plurality of sensor electrodes. Each region of the plurality of regions is partially overlapped by one or more other regions. The method further comprises detecting, during at least a first active input sensing sub-period, a presence of an active input device by a first sensor electrode.…
Central receiver for performing capacitive sensing
Granted: April 27, 2021
Patent Number:
10990148
This disclosure generally provides an input device that includes multiple sensor and display electrodes and a processing system. The processing system includes a plurality of local receivers coupled to respective ones of the sensor electrodes, where the local receivers are configured to acquire first resulting signals from the sensor electrodes. The processing system also includes a central receiver coupled to the sensor electrodes and configured to acquire second resulting signals from…
Connection pad configuration of semiconductor device
Granted: April 27, 2021
Patent Number:
10991668
A semiconductor device comprises a semiconductor substrate, a connection pad, and a bump. The connection pad is connected to the bump and disposed between the semiconductor substrate and the bump. The connection pad has one or more slits.
Device and method for compensation of power source voltage drop in display panel
Granted: April 27, 2021
Patent Number:
10991318
A display driver comprises image processing circuitry, compensation circuitry, voltage data generator circuitry, and drive circuitry. The image processing circuitry is configured to generate a first voltage data based on an image data corresponding to an image to be displayed on a display panel. The compensation circuitry is configured to generate correction values for pixels of the display panel, based on a total current consumed in the pixels of the display panel and positions of the…
Compressed data transmission in panel display system
Granted: April 27, 2021
Patent Number:
10991304
A host device divides original data into first to Nth stream data for N being an integer of two or more, generates first to Nth compressed stream data by sequentially compressing the first to Nth stream data with a variable length compression, divides the first to Nth compressed stream data into fixed-length blocks, and sequentially transmits the fixed-length blocks to the display driver. The display driver includes a memory storing therein the fixed-length blocks and a decompression…
Display-integrated optical sensor with focused and folded light path
Granted: April 27, 2021
Patent Number:
10990225
A method for optically imaging an object using a display device includes: illuminating, by the display device, an object at a sensing region corresponding to an optical sensor of the display device; conditioning, by the display device, light from the sensing region, wherein conditioning the light includes focusing and reflecting the light; receiving, by the display device, the conditioned light at photodetectors of the optical sensor; and generating, by a processing system associated…
Mitigating interference in a capacitive sensing device
Granted: April 27, 2021
Patent Number:
10990158
An example method of capacitive sensing includes: transmitting a first waveform over a first time period; transmitting a second waveform over a second time period, wherein the second waveform is independent of the first waveform, and wherein at least a portion of the second time period does not overlap the first time period; receiving, from sensor electrodes, a first resulting signal in response to capacitive coupling of the first waveform and a second resulting signal in response to…
