Synaptics Corporation

Elo Touch Solutions, Inc.

Damien Berget

Joel Christopher Kent

Joseph Kurth Reynolds

Kenneth John North

David S Hecht

Kyu-Tak Son

Paul Leonard Futter

James Roney

Kenneth Andrew Feehan

Forrest Kim Wunderlich

Robert William Kitchin

Jung Verheiden

Takashi Nose

Hirobumi Furihata

Stephen L Morein

David A Sobel

Jeremy Roberson

Petr Shepelev

Kasra Khazeni

Daniel H Scharff

Bruno Thuillier

David Samuel Hecht

Techniques for providing multi-user multi-touch projected capacitive touch sensors are disclosed herein. Some embodiments may include a method that includes receiving a first sense signal from a first sensing array, the first sensing array configured to provide the first sense signal indicating a first touch on a first touch surface of a touch substrate as well as receiving a second sense signal from a second sensing array, the second sensing array configured to provide the second sense signal indicating a second touch on a second touch surface of a second touch substrate occurring concurrently to the first touch. The method may further include determining whether the first touch and the second touch share at least one anti-ghost. The method may also include associating the first touch and the second touch with a common touch entity in response to determining that the first touch and the second touch share the at least one anti-ghost.

Multi-user multi-touch projected capacitance touch sensor with event initiation based on common touch entity detection

A system and method for encoding, transmitting and updating a display based on demura calibration information for a display device comprises generating demura correction coefficients based on display color information, separating coherent components from the demura correction coefficients to generate residual information, and encode the residual information using a first encoding technique. Further, the image data may be divided into data streams, compressed and transmitted to from a host device to a display driver of a display device. The display driver decompresses and drives subpixels of the pixels in based on the decompressed data. The display driver updates the subpixels of a display using corrected greyscale values for each subpixel are determined from the decompressed data.

Encoding demura calibration information

A system and method for updating a display of a display device. The display device may include a plurality of subpixels, and a display driver coupled to the plurality of subpixels. The display driver may be configured to compare a first data signal of a first statistically selected subpixel of the plurality of subpixels to a first statistically selected threshold, increase a value of a first counter corresponding to the first statistically selected subpixel in response to the first subpixel data signal exceeding the first statistically selected threshold, adjust the first subpixel data signal in response to the first counter value satisfying a second threshold, and drive the first statistically selected subpixel based at least in part on the adjusted first subpixel data signal.

System and method for display compensation

Embodiments disclosed herein generally relate to electronic devices, and more specifically, to a waveform generation circuit for input devices. One or more embodiments provide a new waveform generator for an integrated touch and display driver (TDDI) and methods for generating a waveform for capacitive sensing with a finely tunable sensing frequency. A waveform generator includes accumulator circuitry, truncation circuitry, and saturation circuitry. The accumulator circuitry is configured to accumulate the phase increment value based on a clock signal, and output the accumulated phase increment value. The truncation circuitry configured to drop one or more bits of the accumulated phase increment value to output a truncated value. The saturation circuitry is configured to compare the truncated value to a saturation limit and output a signal corresponding to accessed data samples.

Waveform generation circuit for finely tunable sensing frequency

A host device divides original data into first to Nstream data for N being an integer of two or more, generates first to Ncompressed stream data by sequentially compressing the first to Nstream data with a variable length compression, divides the first to Ncompressed 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 circuitry reading out the fixed-length blocks from the memory. The decompression circuitry includes first to Nprocessing circuits. The first to Nprocessing circuits each perform a predetermined process on the fixed-length blocks received to generate processed data. The host device sorts the fixed-length blocks so that the fixed-length blocks are supplied in the order in which the first to Nprocessing circuits require the fixed-length blocks.

Compressed data transmission in panel display system

A display driver for driving a display panel includes a voltage data generator circuit calculating a voltage data value from an input grayscale value and a driver circuitry driving the display panel in response to the voltage data value. The voltage data generator circuit includes a basic control point data storage circuit storing therein basic control point data specifying a basic correspondence relationship between the input grayscale value and the voltage data value, a correction data memory storing correction data for each of the pixel circuits, a control point calculation circuit and a data correction circuit. When the voltage data value is calculated for a specific pixel circuit, the control point calculation circuit generates control point data associated with the specific pixel circuit by correcting the basic control point data on the basis of the correction data associated with the specific pixel circuit, and The data correction circuit calculates the voltage data value from the input grayscale value on the basis of the correspondence relationship specified by the control point data associated with the control point data.

Device and method for image data processing

Techniques for providing multi-user multi-touch projected capacitive touch sensors are disclosed herein. Some embodiments may include a method that includes receiving a first sense signal indicating a first touch attributed to a first touch entity and receiving a second sense signal indicating a second touch attributed to a second touch entity. Based on the first sense signal and second sense signal, the method may further include determining that the first touch entity and the second touch entity are a common touch entity. Furthermore, the method may include initiating an event in response to determining that the first touch entity and the second touch entity form a common touch entity.

Embodiments of the disclosure provided herein provide a device and method of using the device that is able to improve the detection of user input provided to an input device while one or more sources of noise are present during the detection process. One or more of the embodiments disclosed herein may include a scanning process and a signal processing technique that is able to more reliably detect the presence and position of an input object by reducing the effect of noise on a resulting signal that is generated during a capacitive sensing process. In some configurations, the scanning and signal processing techniques disclosed herein can be improved by increasing a capacitive sensing device's ability to detect the presence of an input object by improving the signal-to-noise ratio of the data collected during a capacitive sensing process.

Method and apparatus for improving capacitive sensing detection

Embodiments herein provide input devices that include an LED display panel on which a discreet capacitive sensor is disposed to form a capacitive sensing region. The capacitive sensor includes a plurality of sensor electrodes that are used to generate capacitive sensing signals indicating user interaction with the input device. In one embodiment, the sensor electrodes are disposed on a cathode layer in the LED display panel such that the sensor electrodes are capacitively coupled to the LED display panel. Currents in the cathode layer can cause interference or noise when performing capacitive sensing. The input devices include an analog front end channel for measuring interference resulting from the cathode layer at the same time receivers measure capacitive sensing signals using the sensor electrodes. The input device may process the capacitive sensing signals differently depending on the measured interference.

Growing community of inventors

Sunnyvale, CA, United States of America

Damien Berget