Display device including touch panel device, and coupling-noise eliminating method

摘要

A display device includes; a touch panel device including; a touch panel and a touch controller connected to the touch panel, the touch controller including; a sampling unit which samples a sensing output signal input thereto from the touch panel to generate a sampled signal, and an analog/digital converter which converts the sampled signal to generate contact information, and a display panel device including; a display panel, a gate driver which applies a gate signal to the display panel, and a data driver which applies a data voltage to the display panel, wherein the sampling unit samples a portion of the sensing output signal which does not include a coupling noise.

主权项

1. A display device comprising:
a touch panel device comprising: a touch panel; and a touch controller connected to the touch panel, the touch controller comprising: a noise removing unit which removes a coupling noise from a sensing output signal input thereto from the touch panel and which outputs a noise-free sensing output signal; a sampling unit which samples the noise-free sensing output signal to generate a sampled signal; and an analog/digital converter which converts the sampled signal to generate contact information; and a display panel device comprising: a display panel; a gate driver which applies a gate signal to the display panel; and a data driver which applies a data voltage to the display panel, wherein the noise removing unit receives a reference noise signal from the touch panel and generates the noise-free sensing output signal by subtracting the reference noise signal from the sensing output signal, wherein the touch panel is disposed substantially opposite to the display panel, the touch panel includes a touch region for sensing a touch and a reference noise extracting region electrically separated from the touch region, the touch region includes a first electrode which outputs the sensing output signal, and the reference noise extracting region includes a second electrode which receives a reference voltage including about 0 V and which outputs the reference noise signal to the touch controller, and wherein the touch region includes a plurality of x-axis electrodes and a plurality of y-axis electrodes insulated from and disposed substantially perpendicular to the plurality of x-axis electrodes, the sensing output signal is output from a first x-axis electrode of the plurality of x-axis electrodes and a first y-axis electrode of the plurality of y-axis electrodes that correspond to a touch point of the touch panel, and the reference noise signal is output from at least one of the plurality of x-axis electrodes except the first x-axis electrode and at least one of the plurality of y-axis electrodes except the first y-axis electrode.