IMAGE COMPRESSION CIRCUITRY AND IMAGE COMPRESSION METHOD
Granted: October 13, 2022
Application Number:
20220329838
Image compression circuitry comprises first-stage compression circuitry, first-stage selector circuitry, second-stage compression circuitry, and second-stage selector circuitry. The first-stage compression circuitry is configured to sequentially receive a plurality of input blocks each comprising pixel data of a plurality of pixels, generate a plurality of first-stage compressed blocks by compressing the plurality of input blocks, and generate a plurality of first-stage decompressed…
BUILT-IN TEST OF A DISPLAY DRIVER
Granted: May 12, 2022
Application Number:
20220148470
A display driver includes image processing circuitry, driver circuitry, and test circuitry. The image processing circuitry is configured to generate first output data during a first display update period and generate second output data during a second display update period. The driver circuitry is configured to update a display panel based on the first output data during the first display update period and update the display panel based on the second output data during the second display…
SHORT-TERM NOISE SUPPRESSION
Granted: April 21, 2022
Application Number:
20220121298
A processing system is configured to drive a transmitter electrode with a repetitive multi-burst pattern. The repetitive multi-burst pattern includes a first multitude of bursts of a sensing waveform and a second multitude of bursts of the sensing waveform. The second multitude of bursts is a repetition of the first multitude of bursts. The processing system is further configured to receive, from a receiver electrode, a resulting signal in response to the repetitive multi-burst pattern,…
IR-DROP COMPENSATION FOR A DISPLAY PANEL INCLUDING AREAS OF DIFFERENT PIXEL LAYOUTS
Granted: April 14, 2022
Application Number:
20220114942
A display driver includes image processing circuitry and driver circuitry. The image processing circuitry is configured to process first image data for pixels of a display panel comprising a first region and a second region to generate output voltage data. The first region and the second region have different pixel layouts. The driver circuitry is configured to update the pixels based on the output voltage data. Processing the first image data comprises IR-drop compensation based on…
SINGLE LAYER CAPACITIVE IMAGING SENSORS
Granted: February 17, 2022
Application Number:
20220050551
A capacitive sensing layer of an input device includes a substantially rectangular sensor pattern extending in a horizontal direction and in a vertical direction, including first and second electrodes. Each of the first electrodes includes a strip extending in the vertical direction. The first electrodes are separated in the horizontal direction by first gaps. Each of the second electrodes includes a substantially rectangular pad, disposed adjacent to one of the first electrodes, in one…
LOW GROUND MASS CORRECTION FOR CAPACITIVE IMAGING SENSORS
Granted: February 17, 2022
Application Number:
20220050548
A capacitive sensing input system includes sensor electrodes disposed in a sensor electrode pattern and a processing system. When under a low ground mass (LGM) condition, proximity-sensing pairs of electrodes formed by a first selective pairing of the sensor electrodes have an increased sensitivity to a presence of an input object in comparison to LGM-sensitive pairs of electrodes formed by a second selective pairing of the sensor electrodes that are primarily sensitive to the LGM…
INPUT- DISPLAY DEVICE WITH SHARED MEMORY
Granted: December 30, 2021
Application Number:
20210405794
An input-display device includes a display screen on a display substrate and capacitive sensing electrodes for capacitive sensing in a sensing region of the display screen. The input-display device also includes a touch and display driver integration (TDDI) circuit on the display substrate, the TDDI circuit including a source driver circuit driving a subset of display pixels of the display screen based on a processed image signal, and an analog frontend for the capacitive sensing,…
REDUCING DISPLAY ARTIFACTS CAUSED BY A SENSING SIGNAL OF A PROXIMITY INPUT DEVICE
Granted: December 23, 2021
Application Number:
20210397297
An input device includes a display substrate and a stack of display layers disposed on the display substrate, the stack of display layers including a conductive layer. The input device further includes at least one capacitive sensing layer in the stack of display layers and a multitude of capacitive sensing electrodes disposed in the at least one capacitive sensing layer, and configured for capacitance sensing. The input device also includes a processing system configured to selectively…
DEVICE AND METHOD FOR DRIVING A SELF-LUMINOUS DISPLAY PANEL
Granted: December 16, 2021
Application Number:
20210390909
A display driver comprises gamma processing circuitry, compensation circuitry, and driver circuitry. The gamma processing circuitry is configured to process the image data to generate gamma processed image data. The compensation circuitry is configured to process the gamma-processed image data, based on a ratio of a number of display elements that emit light to a total number of display elements of a display panel, to generate compensated image data. The driver circuitry is configured to…
Device and Method for Image Processing in a Display Driver
Granted: November 18, 2021
Application Number:
20210358375
A display driver comprises image processing circuitry and driver circuitry. The image processing circuitry is configured to receive spatial distribution information of a physical quantity related to a display panel. The image processing circuitry is further configured to generate output voltage data by processing input pixel data associated with subpixels of the pixel. The drive circuitry is configured to drive the display panel based on the output voltage data.
COMMON MODE NOISE SUPPRESSION WITH RESTORATION OF COMMON MODE SIGNAL
Granted: November 18, 2021
Application Number:
20210357047
A processing system is disclosed. The processing system includes an amplifier configured to generate a feedback signal including a spatial common mode estimate from spatial-common-mode-processed signals. The processing system further includes charge integrators configured to obtain resulting signals from capacitive sensor electrodes, the resulting signals including a spatial common mode, and generate the spatial-common-mode-processed signals by mitigating the spatial common mode in the…
SYSTEM AND METHOD FOR VOLTAGE GENERATION
Granted: November 18, 2021
Application Number:
20210356983
A voltage generator circuitry includes first to third bipolar transistors having commonly-connected base electrodes, first and second current mirror circuitries, first and second differential amplifiers; a first resistor; and a current-voltage conversion circuitry. The first current mirror circuitry supplies currents to the first to third bipolar transistors and to the current-voltage conversion circuitry. The second current mirror circuitry supplies currents to the first to third…
MITIGATING ARTIFACTS ASSOCIATED WITH LONG HORIZONTAL BLANK PERIODS IN DISPLAY PANELS
Granted: September 30, 2021
Application Number:
20210304660
A display panel includes a first scan driving circuit, a second scan driving circuit, and a third scan driving circuit. The first scan driving circuit is configured to generate a first gate scan signal to control programming of a first display line in a first horizontal sync period that includes a long horizontal blank (LHB) period. The second scan driving circuit is configured to generate a first dummy gate scan signal to control initialization of a second display line in the LHB period…
NOISE SUPPRESSION CIRCUIT
Granted: September 23, 2021
Application Number:
20210294454
A processing system is disclosed. The processing system includes an amplifier including a multitude of input resistors receiving a multitude of reduced noise signals from a multitude of charge integrators and a summing resistor at an output of the amplifier. The amplifier is configured to generate a feedback signal at the output of the amplifier by amplifying each of a multitude of reduced noise signals using a gain value and a cardinality of the multitude of reduced noise signals. The…
USING ELECTRICAL RESISTANCE TO ESTIMATE FORCE ON AN ELECTRODE DURING TEMPERATURE CHANGES
Granted: August 5, 2021
Application Number:
20210240324
A processing system includes sensor circuitry and processing circuitry. The sensor circuitry is configured to, using the sensor electrodes, obtain capacitive measurements of a sensing region, and obtain a resistance measurement of the sensing region. The processing circuitry is coupled to the sensor circuitry. The processing circuitry is configured to determine a location of an input object using the capacitive measurements of the sensing region; and determine a force value based on the…
SENSOR PATTERNS FOR CAPACITIVE IMAGING SENSORS IN TOUCH DISPLAYS
Granted: July 29, 2021
Application Number:
20210232268
A sensor pattern for capacitive sensing includes a first electrode and a multitude of second electrodes capacitively coupled to the first electrode. The first electrode includes a strip extending in a vertical direction across the sensor pattern. The multitude of second electrodes include a first subset and a second subset. The first subset of the multitude of second electrodes is arranged in a first column, the first column extending in a vertical direction. The second subset of the…
MINIMIZING LATENCY FOR RESONANT INPUT OBJECT DETECTION AND CLASSIFICATION
Granted: May 27, 2021
Application Number:
20210157428
A method includes driving, by the master controller, transmitter electrodes with a first transmitter signal having a first sensing frequency while transmitting a first trigger signal to slave controllers, obtaining a location of an input object determined from first capacitive measurements determined by the slave controllers using the first trigger signal, and performing a resonant frequency scan. The performing the resonant frequency scan is by performing for each possible resonant…
BASELINE UPDATE FOR INPUT OBJECT DETECTION
Granted: December 24, 2020
Application Number:
20200401252
Baseline update for input object detection includes determining raw measurements from resulting signals acquired for a sensing region, obtaining a masked region of the sensing region based on the raw measurements, and generating a baseline update value using a subset of the raw measurements corresponding to an unmasked region. A baseline value of the masked region is updated using the baseline update value to obtain an updated baseline. A location of an input object is detected using the…
Plural Gammas Control Technology for Display Panel
Granted: December 17, 2020
Application Number:
20200394980
A display driver is disclosed. The display driver includes: a memory that stores initial control points (CPs) defining a first gamma curve for a first analog state associated with a display panel (DP); CP calculation circuitry that generates, based on the initial CPs, calculated CPs for a second analog state associated with the DP; multiplexer circuitry that: inputs the calculated CPs, auxiliary CPs defining a second gamma curve, and a switching signal identifying a luminance of a region…
CAPACITIVE SENSING ACQUISITION SCHEMES
Granted: December 3, 2020
Application Number:
20200379590
An input device including a sensing region is disclosed. The input device includes: sensor circuitry configured to: operate, during a first timeslot, electrodes as a first cluster; and operate, during a second timeslot, the electrodes as a second cluster, where the electrodes are aligned with an axis, and where at least one of the electrodes operates as a transmitter in the first cluster and as a receiver in the second cluster; and determination circuitry configured to: determine a first…
