Display device and driving method thereof
First Claim
1. A touch display device, comprising:
- 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 detect a touch during a touch sensing period and a plurality of touch electrode lines electrically connected to the plurality of touch electrodes,a touch sensing circuit to supply an alternating touch drive signal to one or more of the plurality of touch electrodes via the plurality of touch electrode lines during the touch sensing period;
a touch assistance signal supply circuit to generate an alternating touch assistance signal during the touch sensing period, the alternating touch assistance signal mimicking the alternating touch drive signal during the touch sensing period; and
a voltage supply line disposed in the non-display area of the touch panel, the voltage supply line disposed outside outer edges of the display area and the voltage supply line at least partially surrounding the plurality of touch electrodes, the voltage supply line supplying a gate voltage to drive gate pulses onto gate lines of display pixels of the display area, and the alternating touch assistance signal being supplied to the voltage supply line by the touch assistance signal supply circuit during the touch sensing period, wherein the gate voltage is one of a gate low voltage for the gate pulses supplied through a gate low voltage supply line and a gate high voltage for the gate pulses supplied through a gate high voltage line,wherein a first touch electrode of the plurality of touch electrodes is connected to a first touch electrode line of the touch electrode lines and a second touch electrode of the plurality of touch electrodes is connected to a second touch electrode line of the touch electrode lines, andwherein the first touch electrode line overlaps with the second touch electrode and the first touch electrode line is not overlapped with the second touch electrode line.
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.
-
Citations
14 Claims
-
1. A touch display device, comprising:
-
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 detect a touch during a touch sensing period and a plurality of touch electrode lines electrically connected to the plurality of touch electrodes, a touch sensing circuit to supply an alternating touch drive signal to one or more of the plurality of touch electrodes via the plurality of touch electrode lines during the touch sensing period; a touch assistance signal supply circuit to generate an alternating touch assistance signal during the touch sensing period, the alternating touch assistance signal mimicking the alternating touch drive signal during the touch sensing period; and a voltage supply line disposed in the non-display area of the touch panel, the voltage supply line disposed outside outer edges of the display area and the voltage supply line at least partially surrounding the plurality of touch electrodes, the voltage supply line supplying a gate voltage to drive gate pulses onto gate lines of display pixels of the display area, and the alternating touch assistance signal being supplied to the voltage supply line by the touch assistance signal supply circuit during the touch sensing period, wherein the gate voltage is one of a gate low voltage for the gate pulses supplied through a gate low voltage supply line and a gate high voltage for the gate pulses supplied through a gate high voltage line, wherein a first touch electrode of the plurality of touch electrodes is connected to a first touch electrode line of the touch electrode lines and a second touch electrode of the plurality of touch electrodes is connected to a second touch electrode line of the touch electrode lines, and wherein the first touch electrode line overlaps with the second touch electrode and the first touch electrode line is not overlapped with the second touch electrode line. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
-
8. A touch display device, comprising:
-
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 detect a touch during a touch sensing period and a plurality of touch electrode lines electrically connected to the plurality of touch electrodes; a touch sensing circuit to supply an alternating touch drive signal to one or more of the plurality of touch electrodes via the plurality of touch electrode lines during the touch sensing period; a touch assistance signal supply circuit to generate an alternating touch assistance signal during the touch sensing period, the alternating touch assistance signal mimicking the alternating touch drive signal during the touch sensing period; a first voltage supply line disposed in the non-display area of the touch panel, the first voltage supply line disposed outside the plurality of touch electrodes, the first voltage supply line supplying a first gate voltage to drive gate pulses onto gate lines of display pixels of the display area; and a second voltage supply line disposed in the non-display area of the touch panel, the second voltage supply line disposed outside the plurality of touch electrodes, the second voltage supply line supplying a second gate voltage to drive gate pulses onto gate lines of display pixels of the display area, wherein the touch assistance signal supply circuit supplies the alternating touch assistance signal to at least one of the first voltage supply line and the second voltage supply line during the touch sensing period, wherein a first touch electrode of the plurality of touch electrodes is connected to a first touch electrode line of the touch electrode lines and a second touch electrode of the plurality of touch electrodes is connected to a second touch electrode line of the touch electrode lines, and wherein the first touch electrode line overlaps with the second touch electrode and the first touch electrode line is not overlapped with the second touch electrode line. - View Dependent Claims (9, 10, 11, 12, 13, 14)
-
Specification