Patent ID: 8363032

Claim:
An image display system comprising a capacitive touch panel, said touch panel comprising: a plurality of capacitor groups, each group comprising a plurality of capacitor modules; a processing circuit selectively electrically connected to each groups and said capacitor modules in each group; a first scanning circuit coupled to each group for scanning each group in turn to make said processing circuit conductive to each group in turn, whereby said processing circuit measures capacitance of each group and identifies a specific group from said groups according to measured capacitances of each group; a second scanning circuit coupled to said processing circuit and said capacitor modules of said specific group, said second scanning circuit scanning said capacitor modules of said specific group in turn to make said processing circuit conductive to each capacitor module of said specific group in turn, whereby said processing circuit measures capacitance of each capacitor module of said specific group and identifies a specific capacitor module from said capacitor modules according to measured capacitances of each capacitor module, so as to generate an input signal associated with a touching position on said touch panel; and a display device, said display device comprising said touch panel and a power supply, wherein said display device comprises a common electrode coupled to each capacitor module, and said processing circuit further comprises a sampling capacitor, and one node of said sampling capacitor is selectively connected to each group and each capacitor module, and the other node is coupled to said common electrode.