Beijing Boe Optoelectronics Technology Co., Ltd.

Stmicroelectronics (Beijing) R&d Company Ltd.

Stmicroelectronics Gmbh

Stmicroelectronics International N.v.

Stmicroelectronics (Shenzhen) R&d Co. Ltd.

Yue Ding

Yuan Yun Wang

Guodong Sun

Bowei Chen

Pengcheng Wen

Pan Wang

Yingying Sun

According to an embodiment, a system for synchronizing a stylus-enabled device with a stylus is proposed. The stylus-enabled device includes a touch controller configured to transmit an uplink signal to the stylus, receive a downlink signal from the stylus, determine a timing offset between the uplink signal and the downlink signal, determine a phase shift of the downlink signal, and adjust a synchronization timing based on the determined timing offset and the determined phase shift.

Touch controller synchronization with the downlink signal of stylus

An example gesture detection method includes detecting at a first time a first touch on a touch panel, where the first touch covers a first area of the touch panel, and then determining whether the first touch is within a track region that surrounds a fingerprint sensing region. The method includes determining whether the first touch is within the fingerprint sensing region, the fingerprint sensing region including a sensing surface of a fingerprint sensor. The method includes determining a first fraction of the fingerprint sensing region covered by the first touch and determining whether the first fraction exceeds a first threshold. The first threshold is a majority of the fingerprint sensing region. The method includes determining a second fraction of all of the first area that is within the fingerprint sensing region and determining whether the second fraction exceeds a second threshold, where the second threshold is a fraction indicative of a majority of an area associated with the corresponding touch. The method includes based on determining that the second fraction exceeds the second threshold, determining whether the first touch is valid.

Touch panel mistouch recognition

A method for operating an electronic device includes detecting, by a touchscreen controller, a touch point on a touchscreen; determining, by the touchscreen controller, coordinates of the touch point; scaling, by the touchscreen controller, up the coordinates of the touch point to obtain scaled up coordinates by overwriting a reserved portion of a touch event protocol with additional information corresponding to the coordinates of the touch point; reporting, by the touchscreen controller, the scaled up coordinates of the touch point to an application processor; and determining, by the application processor, the coordinates of the touch point with an increased resolution by converting the scaled up coordinates into a floating point value.

Touchscreen with coordinate values indicative of a tenth of a pixel

A method for reporting touch on a touchscreen includes detecting first touch data from the touchscreen corresponding to a first touch on the touchscreen; determining coordinates of the first touch from the first touch data; reporting the coordinates of the first touch at a first time; determining predicted coordinates of a second touch based on a linear regression of historical touch data; and reporting the predicted coordinates of the second touch at a second time, where the second time occurs after the first time.

Touch report rate of touchscreen

The present invention relates to a method of extending a pixel gray scale. The secondary gray scale levels with different charging times and the same gray scale voltage are formed by controlling a charging time of the gray scale voltage of every primary gray scale level and refining the level, wherein, the gray scale voltage of the every secondary gray scale level is the same as that of the corresponding primary gray scale level, and its charging time corresponds to the secondary gray scale level. The primary gray scale level of the display pixel of the liquid crystal panel is extended by using this method and the disadvantage of the imperfect display brought forward by the control method using frame rate in the prior art is overcome. The present invention further provides a drive method of controlling the pixel charging time and a drive apparatus thereof, which realizes the pixel gray scale extension by controlling the charging time of the pixel capacitance. It overcomes the disadvantage that a grid strip may be formed visually using the characteristic of the visual retention and the visual inertia of the human eyes while largely increasing the number of colors that can be displayed.

Method for pixel gradation extension, drive method and apparatus for charging time of pixel capacitance

The present invention relates to a Liquid Crystal Display data processing method and apparatus. The data processing method comprises receiving a (n+1)row of actual data, reading a buffered nrow of actual data, and performing an exclusive-or operation on the (n+1)row of actual data and the nrow of actual data to generate a (n+1)row of exclusive-or data and transmit it to a data driver. The data processing apparatus comprises a signal receiver, a data path, a first data receiver, a first data buffer memory, an exclusive-or processor and a data transmitter, wherein the exclusive-or processor is connected to the first data receiver and the first data buffer memory respectively, and is used to generate a current row of exclusive-or data by performing an exclusive-or operation. The present invention removes redundant data, effectively reduces data variation amount in data transmission between a sequential controller and the data driver, and reduces Electro-Magnetic Interference of the Liquid Crystal Display to the largest extent.

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Beijing, China

Yue Ding