Patent ID: 9292117
Filing Date: 2016-03-22
CPC Classification: G06F

Claim Text:
1. A touch sensing display device comprising: a touch screen integrated with a display panel including data lines, gate lines crossing the data lines, touch electrodes for sensing a touch input, and pixels arranged in a matrix form at crossings of the gate lines and the data lines, the gate lines separate and disconnected from the touch electrodes; and a touch sensing circuit configured to operate in a display mode or a touch mode according to a control signal, the control signal including a first period in which the control signal is at a first level indicative of the display mode and a second period in which the control signal is at second level indicative of the touch mode, wherein: a common voltage is supplied to all the touch electrodes to display an image on the pixels during the first period of the control signal in which the control signal is at the first level; the touch sensing circuit does not supply a touch driving signal to any of the touch electrodes during a first part of the second period of the control signal, the first part of the second period of the control signal immediately following the first period of the control signal and a ripple of voltage on the gate lines being outside a predetermined range in the first part of the second period of the control signal; and the touch sensing circuit supplies the touch driving signal to one or more of the touch electrodes during a second part of the second period of the control signal, the second part of the second period of the control signal being subsequent to the first part of the second period of the control signal and the ripple of the voltage on the gate lines being within the predetermined range in the second part of the second period of the control signal, touch sensing signals from the one or more touch electrodes responsive to the touch drive signal being used to detect the touch input.