Tethered stylus for use with a capacitance-sensitive touchpad

G - Physics – 06 – K

Patent

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Details

G06K 11/06 (2006.01) G06F 3/033 (2006.01) G06F 3/044 (2006.01)

Patent

CA 2538107

A tethered pen is coupled to an unused sense line input of touchpad sensor circuitry of a capacitance-~sensitive touchpad, wherein the capacitance- sensitive touchpad is operable in a normal manner for detecting touch or proximity of a finger or other conductive pointing object to a touchpad surface by receiving input at a first sense input from a first sense line embedded within the touchpad, and wherein a second sense input is coupled to a tethered pen via a second sense line, wherein the second sense line enables the touchpad sensor circuitry to detect the touch of the pen on or in proximity to electrodes within the touchpad.

Selon cette invention, un stylo attaché est couplé à une entrée de fil de lecture non utilisée d'un circuit de capteurs d'un pavé tactile sensible à la capacitance. Ce pavé tactile sensible à la capacitance fonctionne normalement pour détecter l'impact ou l'approche d'un doigt ou autre objet de pointage conducteur sur une surface de pavé tactile en recevant l'entrée, au niveau d'une première entrée de lecture, d'un premier fil de lecture intégré au pavé tactile. Une seconde entrée de lecture est couplée à un stylo attaché par l'intermédiaire d'un second fil de lecture, le second fil de lecture permettant au circuit de capteurs du pavé tactile de détecter l'impact du stylo sur ou à proximité des électrodes du pavé tactile.

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