Driving signal output device, a driving signal output method, and a display device
A driving signal output device according to an embodiment comprise a display driving circuit configured to output a display driving signal in a display interval within a first data writing interval, in a low-speed driving mode in which a data holding interval is located between data writing intervals, and a touch driving circuit configured to identify that a first touch is detected in a first touch sensing interval within the first data writing interval and to identify a position of the first touch in a second touch sensing interval within the first data writing interval.
1 . A driving signal output device, comprising:
a display driving circuit configured to output a display driving signal in a display interval within a first data writing interval, in a low-speed driving mode in which a data holding interval is located between data writing intervals; and
a touch driving circuit configured to identify that a first touch is detected in a first touch sensing interval within the first data writing interval and to identify a position of the first touch in a second touch sensing interval within the first data writing interval, wherein the first data writing interval comprises the display interval, the first touch sensing interval, and the second touch sensing interval, and wherein the first touch sensing interval is configured to precede a last touch sensing interval among a plurality of touch sensing intervals included in the first data writing interval, and the second touch sensing interval is located between the first touch sensing interval and the last touch sensing interval within the first data writing interval, and the display interval is located between the first touch sensing interval and the second touch sensing interval.
2 . The driving signal output device of claim 1 , wherein a first data holding interval is located between the first data writing interval and a second data writing interval.
3 . The driving signal output device of claim 1 , wherein a display refresh rate of the low-speed driving mode is determined based on a width of the data holding interval.
4 . The driving signal output device of claim 1 , wherein the touch driving circuit is configured to identify presence or absence of a touch in the first touch sensing interval.
5 . The driving signal output device of claim 1 , wherein the touch driving circuit is configured to operate in a touch active mode based on identifying that the first touch is detected in the first touch sensing interval.
6 . The driving signal output device of claim 1 , wherein the touch driving circuit is configured to externally transmit information corresponding to the position of the first touch identified in the second touch sensing interval.
7 . The driving signal output device of claim 1 , wherein the first touch sensing interval is set in a first half of the first data writing interval.
8 . The driving signal output device of claim 1 , wherein the first touch sensing interval or the second touch sensing interval is set in a long horizontal blank (LHB) interval.
9 . The driving signal output device of claim 8 , wherein the first touch sensing interval is set before three LHB intervals from the last LHB interval among a plurality of LHB intervals included in the first data writing interval.
10 . The driving signal output device of claim 1 , wherein a driving signal output circuit is configured to output the display driving signal based on a synchronization signal received from a timing controller.
11 . A driving signal output method, comprising:
operating in a low-speed driving mode in which a data holding interval is located between data writing intervals;
outputting a display driving signal in a display interval within a first data writing interval in the low-speed driving mode;
identifying that a first touch is detected in a first touch sensing interval within the first data writing interval; and
identifying a position of the first touch in a second touch sensing interval within the first data writing interval in response to identifying that the first touch is detected, wherein the first data writing interval comprises the display interval, the first touch sensing interval, and the second touch sensing interval, and wherein the first touch sensing interval is configured to precede a last touch sensing interval among a plurality of touch sensing intervals included in the first data writing interval, and the second touch sensing interval is located between the first touch sensing interval and the last touch sensing interval within the first data writing interval, and the display interval is located between the first touch sensing interval and the second touch sensing interval.
12 . The driving signal output method of claim 11 , wherein the identifying that the first touch is detected in the first touch sensing interval within the first data writing interval comprises:
identifying presence or absence of a touch in the first touch sensing interval.
13 . The driving signal output method of claim 11 , further comprising:
operating in a touch active mode based on identifying that the first touch is detected in the first touch sensing interval.
14 . The driving signal output method of claim 11 , wherein the first touch sensing interval is set in a first half of the first data writing interval.
15 . The driving signal output method of claim 11 , wherein the first touch sensing interval or the second touch sensing interval is set in a long horizontal blank (LHB) interval.
16 . The driving signal output method of claim 15 , wherein the first touch sensing interval is set before three LHB intervals from the last LHB interval among a plurality of LHB intervals included in the first data writing interval.
17 . A display device, comprising:
a panel;
a display driving circuit configured to output a display driving signal to the panel in a display interval within a first data writing interval, in a low-speed driving mode in which a data holding interval is located between data writing intervals; and
a touch driving circuit configured to identify that a first touch is detected in a first touch sensing interval within the first data writing interval and to identify a position of the first touch in a second touch sensing interval within the first data writing interval, wherein the first data writing interval comprises the display interval, the first touch sensing interval, and the second touch sensing interval, and wherein the first touch sensing interval is configured to precede a last touch sensing interval among a plurality of touch sensing intervals included in the first data writing interval, and the second touch sensing interval is located between the first touch sensing interval and the last touch sensing interval within the first data writing interval, and the display interval is located between the first touch sensing interval and the second touch sensing interval.
18 . The display device of claim 17 , wherein the first touch sensing interval is set in a first half of the first data writing interval.
19 . The display device of claim 17 , wherein the first touch sensing interval or the second touch sensing interval is set in a long horizontal blank (LHB) interval.
20 . The display device of claim 19 , wherein the first touch sensing interval is set before three LHB intervals from the last LHB interval among a plurality of LHB intervals included in the first data writing interval.