Method and system for securing communication links using enhanced authentication
Granted: December 28, 2021
Patent Number:
11212671
A method and system for securing CSI and DSI links using enhanced authentication and cloud tracking are disclosed. According to one embodiment, a method comprises receiving at the receiving device an encrypted information signal from the transmitting device. The encrypted information signal includes a unique identifier of the transmitting device. The method further comprises testing whether a whitelist at the receiving device includes the unique identifier of the transmitting device. The…
Device and method for compensation of power source voltage drop
Granted: December 28, 2021
Patent Number:
11212424
A display driver comprises drop amount calculation circuitry and digital gamma correction circuitry. The drop amount calculation circuitry is configured to calculate a drop amount of a power source voltage supplied to a display panel from a setting value. The digital gamma correction circuitry is configured to perform digital gamma correction on an input image data based on the drop amount.
Device and method for proximity sensing on an input device
Granted: December 28, 2021
Patent Number:
11209926
A processing system comprises a first source amplifier and an analog front end. The first source amplifier comprises a first input electrically connectable to a first sensor electrode of a display panel and configured to generate a first drive signal based on a first grayscale voltage corresponding to a first pixel data and generate a first comparison output signal based on a first sensing signal from the first sensor electrode and a reference voltage. The analog front end is configured…
Proximity sensing with soft-synchronization to noise
Granted: December 21, 2021
Patent Number:
11204667
An input device includes a capacitive proximity sensor and a processing system. The capacitive proximity sensor includes a multitude of transmitter electrodes and a multitude of receiver electrodes for proximity sensing in a sensing region. The processing system is configured to obtain a noisy sensor signal from the capacitive proximity sensor, extract a spike train in the noisy sensor signal, synchronize a pulse output of a pulse-generating circuit onto the spike train, and triggered by…
Input device having reduced electromagnetic interference
Granted: December 21, 2021
Patent Number:
11204665
An input device comprises a plurality of data lines of a display panel, a plurality of sensor electrodes, and a processing system. The processing system drives a sensor electrode with a sensing signal during a first portion of a non-display update period of a display frame. In certain embodiments, a source driver of the processing system drives a data line with a first constant voltage during at least one of a second portion of the non-display update period and a third portion of the…
Force sensing input device utilizing strain gauges
Granted: December 14, 2021
Patent Number:
11199458
A force sensing device includes a first force sensor and a second force sensor. The first force sensor is configured to output a first force resulting signal and includes a first strain gauge coupled to a first voltage source and a first trace. The first force sensor further includes a second strain gauge coupled to a second voltage source and the first trace. The second force sensor is configured to output a second force resulting signal having a polarity opposite that of the first…
Compensation driving for long horizontal blank
Granted: December 7, 2021
Patent Number:
11195493
One or more embodiments are directed to compensating for a long horizontal blank (LHB) period. Using a first display data value, a compensation amount is determined from a mapping between display data and compensation amounts. The first display data value is for a display row after an LHB period in a display frame of a display panel. A second display data value is adjusted with the compensation amount to obtain revised display data value. The revised display data value is outputted for…
Device and method for proximity sensing for display panel having a variable display frame rate
Granted: December 7, 2021
Patent Number:
11194420
A processing system comprises interface circuitry and a timing controller. The interface circuitry is configured to receive a vertical sync period indicator that indicates a start of an external vertical sync period. The timing controller is configured to, in response to a change in a display frame rate, control timing of a display drive operation and a proximity sensing operation to maintain a proximity sensing frame rate based on input timing of the vertical sync period indicator to…
Device and method for mura compensation
Granted: November 30, 2021
Patent Number:
11189222
A display driver includes image processing circuitry and driver circuitry. The image processing circuitry is configured to process image data for a plurality of pixel circuits of a display panel. The image processing circuitry includes a demura table comprising one or more base compensation values associated with each of the plurality of pixel circuits, and a lookup table (LUT) comprising one or more compensation coefficients associated with each of a plurality of frame rates. Processing…
Low-power differential data transmission systems and methods
Granted: November 30, 2021
Patent Number:
11190235
Systems and methods for differential data transmission using an unterminated transmission line comprise a plurality of switches configured to control a differential voltage output on a pair of output lines, wherein the plurality of switches have a first state in which a high voltage is output on a first of the pair of output lines and a low voltage is output on a second of the pair of output lines, and wherein the plurality of switches have a second state in which the low voltage is…
Automative knob sensing device
Granted: November 30, 2021
Patent Number:
11188161
An electronic device includes a rotatable interface configured to be placed on an input device, the rotatable interface including a conductor region and an adjacent patterned region. The rotatable device further includes a first set of coupling electrodes configured to be electrically coupled to the conductor region and to receive a reference signal from a first electrode of the input device, and a second set of coupling electrodes configured to be electrically coupled to the patterned…
Protection of speaker from excess excursion
Granted: November 23, 2021
Patent Number:
11184705
Systems and methods for protecting a loudspeaker from excessive excursion include an audio source, an adaptive excursion protection filter, an audio clipper, an inverse excursion protection filter, an amplifier and a loudspeaker. The system performs operations including receiving an audio signal, applying an excursion protection filter, the excursion protection filter adapting in real-time to one or more speaker conditions, clipping the audio signal, applying an inverse excursion…
Method and system for securing in-vehicle ethernet links
Granted: November 23, 2021
Patent Number:
11184177
A method and system for securing in-vehicle ethernet links are disclosed. According to one embodiment, a method comprises receiving from an authenticator, via an insecure channel, a public key of the authenticator, a random number, and a challenge. A private key of the peer that was supplied to the peer is accessed from local storage at the peer. A state machine computes a session key for the peer, based on the random number, the public key of the authenticator, and the private key of…
Device and method for mura correction
Granted: November 23, 2021
Patent Number:
11183126
A display driver comprises a first memory configured to store mura correction data image processing circuitry configured to perform mura correction on image data to be displayed on a display panel based on the mura correction data received from the first memory, and control circuitry configured to detect a first error in the mura correction data received from the first memory. The control circuitry is further configured to control a communication with a second memory storing the mura…
Compensation technology for display panel
Granted: November 23, 2021
Patent Number:
11183101
A display driver comprises: digital gamma circuitry configured to generate a voltage data based on an image data for a pixel of interest; compensating circuitry configured to calculate a total current of the display panel; and correction circuitry. The correction circuitry is configured to correct the voltage data, based on the calculated total current.
IC chip layout for minimizing thermal expansion misalignment
Granted: November 16, 2021
Patent Number:
11177229
An integrated circuit (IC) chip comprises a plurality of pads and a plurality of bumps. The plurality of pads includes a first pad. The plurality of bumps is disposed on the plurality of pads. The plurality of bumps includes a first bump disposed on the first pad. The first bump as a width that is different than an exposed with of the first pad. The center of the first bump is not aligned with a center of the first pad.
Device and method for driving display panel
Granted: November 16, 2021
Patent Number:
11176899
A display driver comprises image processing circuitry and drive circuitry. The image processing circuitry is configured to output display image data representing a display image comprising an effective area to be displayed in a display area of a display panel and an invalid area not to be displayed in the display area. The drive circuitry drives the display panel based on the display image data comprising effective pixel data associated with first pixels included in the effective area…
Device and method for display module calibration
Granted: November 16, 2021
Patent Number:
11176859
A method comprises acquiring measured luminance levels at a measurement point of a display area for a plurality of test images displayed in the display area, and estimating one or more luminance levels at one or more corresponding luminance estimation points of the display area using the measured luminance levels. The method further comprises determining, based on the one or more estimated luminance levels, a correction parameter using the estimated one or more luminance levels.
Systems and methods for detecting ambient light or proximity with an optical sensor
Granted: November 16, 2021
Patent Number:
11175177
A method for determining an amount of ambient light illumination is disclosed. The method includes: estimating a contribution per color component in an optical sensing region of an input frame to be displayed on a display device, wherein the optical sensing region corresponds to a location of an optical sensor in the display device, wherein the input frame comprises digital information for each color component for each pixel of the input frame; causing the optical sensor to detect an…
Device and method for controlling a display panel
Granted: November 9, 2021
Patent Number:
11170692
The display driver includes control circuitry and signal supply circuitry. The control circuitry is configured to store a first setting table for a first frame rate and a second setting table for a second frame rate. The control circuitry is further configured to, in response to adjusting a frame rate of a display device from the first frame rate to the second frame rate, generate an interpolated control parameter through interpolation of a first control parameter obtained from the first…
