Patent ID: 9710104
Date: 2017-07-18
CPC Classifications: G06F

Claim:
1. A method for operating a touch screen device having a touch screen panel, comprising: monitoring, during a noise monitoring phase, channel signals of channels of the touch screen panel; detecting a stylus noise signal in response to a channel signal having a channel signal magnitude greater than a stylus threshold and less than a palm threshold; detecting a palm noise signal in response to the channel signal magnitude being greater than the palm threshold, wherein the palm threshold has a greater magnitude than the stylus threshold; selecting a first set of channels with detected stylus noise signals, in response to the detecting the stylus noise signal, and wherein the stylus noise signal has a lesser magnitude than the palm noise signal; disabling a second set of channels with detected palm noise signals, in response to the detecting the palm noise signal, and wherein the palm noise signal has a greater magnitude than the stylus noise signal whereby the palm noise signal masks the stylus noise signal; receiving a synchronization signal transmitted by a stylus on the selected first set of channels; and synchronizing the stylus with the selected first set of channels during a synchronization phase.