Display Device and Driving Method Thereof
First Claim
1. A touch display device, comprising:
- a controller to generate a touch sync signal for controlling timing of a touch sensing period and a display period in each of a plurality of frames;
a touch panel having a display area and a non-display area surrounding the display area, the touch panel having a plurality of touch electrodes in the display area to generate touch sensing signals indicating whether or not a touch occurred during the touch sensing period;
a touch sensing circuit to supply a touch drive signal to one or more of the plurality of touch electrodes during the touch sensing period and to detect if the touch occurred based on the touch sensing signals received from the one or more of the plurality of touch electrodes;
a voltage supply line disposed in the non-display area of the touch panel, the voltage supply line supplying a DC voltage during the display period; and
a touch assistance signal supply circuit to generate a touch assistance signal on the voltage supply line during the touch sensing period, the touch assistance signal mimicking the touch drive signal during the touch sensing period.
1 Assignment
0 Petitions
Accused Products
Abstract
In a touch display device, a controller generates a touch sync signal for controlling timing of a touch sensing period and a display period in each of a plurality of frames. A touch panel has a plurality of touch electrodes in a display area to generate touch sensing signals indicating whether or not a touch occurs during the touch sensing period. A touch sensing circuit supplies a touch drive signal to the plurality of touch electrodes during the touch sensing period and detects if the touch occurred based on the touch sensing signals received from the plurality of touch electrodes. A touch assistance line surrounds the display area and is disposed in the non-display area of the touch panel. A touch assistance signal supply circuit generates a touch assistance signal on the touch assistance line. The touch assistance signal mimics the touch drive signal during the touch sensing period.
20 Citations
21 Claims
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1. A touch display device, comprising:
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a controller to generate a touch sync signal for controlling timing of a touch sensing period and a display period in each of a plurality of frames; a touch panel having a display area and a non-display area surrounding the display area, the touch panel having a plurality of touch electrodes in the display area to generate touch sensing signals indicating whether or not a touch occurred during the touch sensing period; a touch sensing circuit to supply a touch drive signal to one or more of the plurality of touch electrodes during the touch sensing period and to detect if the touch occurred based on the touch sensing signals received from the one or more of the plurality of touch electrodes; a voltage supply line disposed in the non-display area of the touch panel, the voltage supply line supplying a DC voltage during the display period; and a touch assistance signal supply circuit to generate a touch assistance signal on the voltage supply line during the touch sensing period, the touch assistance signal mimicking the touch drive signal during the touch sensing period. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for operating a touch display device, the method comprising:
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generating, by a controller, a touch sync signal for controlling timing of a touch sensing period and a display period in each of a plurality of frames; supplying, by a voltage supply line disposed in a non-display area surrounding a display area of a touch panel, a DC voltage during the display period; supplying, by a touch sensing circuit, a touch drive signal to one or more of a plurality of touch electrodes in the display area of the touch panel during the touch sensing period; supplying by a touch assistance signal supply circuit, a touch assistance signal on the voltage supply line during the touch sensing period, the touch assistance signal mimicking the touch drive signal; receiving, from the one or more of the plurality of touch electrodes, touch sensing signals indicating whether or not a touch occurred during the touch sensing period; and detecting, by the touch sensing circuit, if the touch occurred during the touch sensing period based on the touch sensing signals received from the plurality of touch electrodes. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A driver circuit for driving a touch display device, the driver circuit comprising:
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a controller circuit to generate a touch sync signal for controlling timing of a touch sensing period and a display period in each of a plurality of frames; a touch sensing circuit to supply a touch drive signal to one or more of a plurality of touch electrodes in a display area of a touch panel during the touch sensing period and to detect if a touch occurred during the touch sensing period based on touch sensing signals received from the plurality of touch electrodes; a power supply circuit to supply a DC voltage during the display period to a voltage supply line disposed in a non-display area of the touch panel surrounding the display area; and a touch assistance signal supply circuit to generate a touch assistance signal on the voltage supply line during the touch sensing period, the touch assistance signal mimicking the touch drive signal during the touch sensing period. - View Dependent Claims (16, 17, 18, 19, 20, 21)
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Specification