Focaltech Systems Co., Ltd.

Forcaltech Systems Co., Ltd.

Hsiang-Cheng Yu

Hsin-Mao Huang

Shih-Hsin Huang

Chih-Hung Kung

Shu-Ming Fan

A touch sensing system for avoiding display noises includes a touch display panel, a display driver integrated circuit and a touch control integrated circuit. The display driver integrated circuit is connected to the touch display panel for performing a display operation. The touch control integrated circuit is connected to the touch display panel and the display driver integrated circuit. The touch control integrated circuit performs a touch sensing on the touch display panel in a vertical blanking interval based on a vertical synchronous signal to generate a first set of touch position data, and perform a touch sensing on the touch display panel in a non-vertical blanking interval to generate a second set of touch position data. The touch control integrated circuit updates the second set of touch position data based on the first set of touch position data.

Touch sensing method and system for avoiding display noises

A multi-touch system for controlling liquid crystal capacitors to reduce touch sensing interferences includes K gate driving lines, which are divided into N groups each corresponding to a common voltage conductive line. When a display driving signal is applied to an i-th group of gate driving lines for performing a display driving, the liquid crystal capacitor corresponding to the i-th group is set to a predetermined voltage, where i=1 to N. Finally, a touch driving signal is applied to an i-th common voltage conductive line corresponding to the i-th group for sensing touch points, so as to reduce touch sensing affections caused by noises of the liquid crystal display.

Multi-touch system and method for controlling liquid crystal capacitors to reduce touch sensing interference

A method for improving linearity of touch system coordinates first reads two-dimensional raw data of a capacitive touch panel. Next, it reads a pixel and adjacent pixels of the pixel from the two-dimension raw data. Then, it determines whether the value of the pixel is great than a pre-determined threshold. If the value of the pixel is not greater than the pre-determined threshold, it then determines whether there is a value of the adjacent pixels is greater than the pre-determined threshold. If there is no value of the adjacent pixels greater than the pre-determined threshold, it sets the value of the pixel to a pre-determined value. Otherwise, it reserves the value of the pixel in order to increase the linearity of two-dimensional raw data so as to avoid the interference of noise to the two-dimensional raw data.

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Taoyuan, Taiwan

Hsiang-Cheng Yu