Driving circuit, touch display device, and method of driving the touch display device
First Claim
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1. A touch display device comprising:
- a plurality of first electrodes disposed within a display panel;
one or more second electrodes disposed outside of the display panel and separated from the first electrodes by a gap; and
a driving circuit to;
provide a touch driving signal to at least one first electrode among the plurality of first electrodes in a touch driving period of a frame period, the touch driving signal provided to the at least one first electrode having a plurality of pulses during the touch driving period of the frame period;
during the touch driving period, sense a touch position based on a change in capacitance between the first electrode provided with the touch driving signal and a pointer;
provide a first force driving signal to the at least one first electrode among the plurality of first electrodes during a force driving period, and provide a second force driving signal different than the first force driving signal to the one or more second electrodes during the force driving period; and
during the force driving period, sense a touch force based on a change in capacitance between a group of the first electrodes provided with the first force driving signal and the one or more second electrodes provided with the second force driving signal,wherein the group of the first electrodes includes at least two first electrodes and the at least two first electrodes are electrically connected to each other.
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Abstract
A driving circuit, a touch display device, and a method of driving the touch display device, in which, when a user touches a screen, not only can a touch point be sensed, but also a level of touch force with which the user presses the screen can also be efficiently sensed, in order to provide a range of functions. It is possible to provide a variety of functions that are not supported by related-art touch sensing technologies.
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Citations
30 Claims
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1. A touch display device comprising:
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a plurality of first electrodes disposed within a display panel; one or more second electrodes disposed outside of the display panel and separated from the first electrodes by a gap; and a driving circuit to; provide a touch driving signal to at least one first electrode among the plurality of first electrodes in a touch driving period of a frame period, the touch driving signal provided to the at least one first electrode having a plurality of pulses during the touch driving period of the frame period; during the touch driving period, sense a touch position based on a change in capacitance between the first electrode provided with the touch driving signal and a pointer; provide a first force driving signal to the at least one first electrode among the plurality of first electrodes during a force driving period, and provide a second force driving signal different than the first force driving signal to the one or more second electrodes during the force driving period; and during the force driving period, sense a touch force based on a change in capacitance between a group of the first electrodes provided with the first force driving signal and the one or more second electrodes provided with the second force driving signal, wherein the group of the first electrodes includes at least two first electrodes and the at least two first electrodes are electrically connected to each other. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 29, 30)
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17. A method of driving a touch display device, the touch display device comprising a plurality of first electrodes disposed within a display panel and one or more second electrodes separated from the first electrodes by a gap, the method comprising:
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providing a touch driving signal to at least one first electrode among the plurality of first electrodes disposed within the display panel during a touch driving period of a frame period, the touch driving signal provided to the at least one first electrode having a plurality of pulses during the touch driving period of the frame period; during the touch driving period, sensing a touch position based on a change in capacitance between the first electrode provided with the touch driving signal and a pointer; providing a first force driving signal to the at least one first electrode among the plurality of first electrodes disposed within the display panel during a force driving period, and providing a second force driving signal different than the first force driving signal to the one or more second electrodes disposed outside of the display panel during the force driving period; and during the force driving period, sensing a touch force based on a change in capacitance between a group of the first electrodes provided with the first force driving signal and the one or more second electrodes provided with the second force driving signal, wherein the group of the first electrodes includes at least two first electrodes and the at least two first electrodes are electrically connected to each other.
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18. A driving circuit for driving touch display device, the touch display device comprising a plurality of first electrodes disposed within a display panel and one or more second electrodes separated from the first electrodes by a gap, the driving circuit comprising:
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a first circuit to provide a touch driving signal to at least one first electrode among the plurality of first electrodes disposed within the display panel during a touch driving period of a frame period, the touch driving signal provided to the at least one first electrode having a plurality of pulses during the touch driving period of the frame period, the first circuit to provide a first force driving signal to the at least one first electrode among the plurality of first electrodes disposed within the display panel during a force driving period, and the first circuit to provide a second force driving signal different than the first force driving signal to the one or more second electrodes disposed outside of the display panel during the force driving period; and a second circuit to sense a touch position based on a change in capacitance between the first electrode provided with the touch driving signal and a pointer and to sense a touch force based on a change in capacitance between a group of the first electrodes provided with the first force driving signal and the one or more second electrodes provided with the second force driving signal, wherein the group of the first electrodes includes at least two first electrodes and the at least two first electrodes are electrically connected to each other. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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Specification