Patent ID: 9152290
Filing Date: 2015-10-06
Classification: G06F

Abstract:
1. A touch-screen system, comprising: a stylus, comprising a magnetic component; a display panel; and a touch module, disposed within the display panel, the touch module comprising a plurality of sensing units distributed at different positions in an array arrangement on the display panel, each of the sensing units comprising a Hall induction plate for sensing a magnetic field established by the magnetic component and forming an induction output voltage respectively, the touch module detecting a touch position of the stylus according to the induction output voltages, wherein each of the sensing units further comprises a power signal source, a first switch, a second switch and a signal amplifier, the first switch is coupled between the power signal source and the Hall induction plate, the second switch is coupled between the Hall induction plate and the signal amplifier, during a first time interval, the first switch is conducted and the power signal source provide a plurality of free charges to the Hall induction plate, the Hall induction plate senses the magnetic field established by the magnetic component and forms an induction voltage difference, the induction voltage difference is processed by the signal amplifier to form the induction output voltage, and during a second time interval after the first time interval, the second switch is conducted to output the induction output voltage.