| 摘要 |
<p>A touch screen stylus has an electrode in its tip that is driven with a signal that provides graphical information to a touch screen device. When a user touches the touch screen with the tip of the stylus this graphical information is detected by a capacitive touch screen controller as a varying capacitance associated with the location where the stylus touches the touch screen. The signal may be turned on when pressure is applied at the tip of the stylus. Varying pressure on the tip of the stylus, tilt angle of the style and/or rotation of the stylus by the user may convey graphical line characteristic information. Input buttons and/or an input wheel on the stylus may be used to input commands or modify graphics on the touch screen. Feedback information may be transmitted back to the stylus by varying the scan rate of the touch screen controller.</p> |
