TOUCH SCREEN DISPLAY AND METHOD OF OPERATING THE SAME
First Claim
1. A touch screen display device comprising:
- a display panel comprising a plurality of display elements arranged between a first electrode layer and a second electrode layer having respective pixel electrodes for the display elements;
a display driver for providing display signals to the display panel, said display signals comprising;
a common display signal, andan input control signal for controlling the display panel,a sensor circuit for providing a probe signal and a shield signal that has the same phase and frequency as the probe signal, and for generating a touch signal in response to an output signal received from the first electrode layer; and
a combination unit for providing a drive signal to the first electrode layer derived from the common display signal and the probe signal, and for providing an output control signal for controlling the display panel from the input control signal and the shield signal.
3 Assignments
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Accused Products
Abstract
A touch screen display device is described that includes a display panel, a display driver, a sensor circuit and a combination unit. The display panel has a plurality of display elements arranged between a first and a second electrode layer. The display driver is arranged for providing display signals comprising a common display signal and an input control signal to the display panel. The sensor circuit is arranged for providing a probe signal and a shield signal mutually having the same phase and frequency and for generating a touch signal in response to the output signal received from the first electrode layer. The combination unit provides a drive signal to the first electrode layer derived from the common display signal and the probe signal, and further provides an output control signal for the display panel from the input control signal and the shield signal.
63 Citations
16 Claims
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1. A touch screen display device comprising:
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a display panel comprising a plurality of display elements arranged between a first electrode layer and a second electrode layer having respective pixel electrodes for the display elements; a display driver for providing display signals to the display panel, said display signals comprising; a common display signal, and an input control signal for controlling the display panel, a sensor circuit for providing a probe signal and a shield signal that has the same phase and frequency as the probe signal, and for generating a touch signal in response to an output signal received from the first electrode layer; and a combination unit for providing a drive signal to the first electrode layer derived from the common display signal and the probe signal, and for providing an output control signal for controlling the display panel from the input control signal and the shield signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of driving a touch screen display device, the display device comprising a display panel comprising a plurality of display elements arranged between a first electrode layer and a second electrode layer having respective pixel electrodes for the display elements, the method comprising the steps of:
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providing display signals for the display panel, comprising a common display signal and an input control signal for the display panel; providing a probe signal and a shield signal that has the same phase and frequency as the probe signal; generating a touch signal in response to an output signal received from the first electrode layer; providing a drive signal to the first electrode layer derived from the common display signal and the probe signal, and providing an output control signal for the display panel from the input control signal and the shield signal. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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Specification