Patent ID: 8610680

Claim:
A touch screen flat panel display (FPD), comprising a display screen, a display driving circuit, a touch system circuit, and a multiplexer or a signal loading and merge circuit enabling electrodes of the display screen to be used for display driving as well as touch detection; wherein the multiplexer enables the electrodes of the display screen to be communicated with the display driving circuit for transmitting display driving signals or to be communicated with the touch system circuit for transmitting touch signals, and the display driving and the touch detection time-division multiplex the electrodes of the display screen; the signal loading and merge circuit enables the electrodes of the display screen to transmit the display driving signals and the touch signals simultaneously, and the display driving and the touch detection share the electrodes of the display screen simultaneously; wherein: during a period that the electrodes of the display screen transmit the touch signals, the touch signals are applied to more than two electrode lines of the display screen at least one moment, the touch system circuit selects at least one electrode line of the display screen having shielding protection as a detecting line from them; when the touch signal is applied to the detecting line, a change of the touch signal flowing through the electrode is also detected; the electrode line of the display screen having the shielding protection refers to an electrode line of the display screen having electrode lines at two adjacent sides or two non-adjacent sides applied with the touch signal or intersected electrode lines applied with the touch signal, and wherein when the touch signal is applied to the detecting line, the same touch signal is also applied to non-detecting lines around the detecting line to provide shielding functions.