The present invention discloses a multi-touch sensing system capable of optimizing touch
bulbs according to the variation of ambient lighting conditions and a method thereof. The …

(57) ABSTRACT A method for detecting an arbitrary number of touches from an input image
of a multi-touch device comprising the fol lowing steps: processing said input image and …

The present invention relates to an extraction method for multi-touch feature information and
a recognition method for multi-touch gestures using the multi-touch feature information, and …

The invention discloses a method of distinguishing multiple touch points applied to an
optical touch system which includes a panel for indicating a first touch point and a second …

(57) ABSTRACT A touch screen assembly including a glass screen, LEDs, photo diodes, a
transparent plastic frame Surrounding the Screen, and a light guide that guides light emitted …

Inventors: Marcelo Ferreira Guimarães,“System and method for multi-touch surface sensing
by Florianopolis (BR); Renato Parenti detection of light spreading through front image, more …

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 …

An optical touch method for sensing touch points triggered on an optical touch panel is
provided. The method includes: obtaining a first to a third luminance distribution images by a …

A method, device, and program product are provided for no-look entry of digits in a multi-
touch device. A multi-touch screen of the multi-touch device senses an initializing …

The invention provides an optical touch system for detecting a position of a touch object on a
touch area, including an active light source for lightening the touch area, a camera having …