Touch display device and touch driving method thereof
Provided are a touch display device and a touch driving method thereof. Touch electrodes are grouped into a touch sensing block and non-touch blocks. The touch electrodes in the touch sensing block and the touch electrodes in the non-touch blocks are sensed at different sensing ratios. Power consumption is efficiently managed and sensitivity in touch sensing is maintained.
1. A touch display device comprising:
a display panel, wherein a touchscreen panel including a plurality of touch electrodes arranged in a matrix form is embedded in the display panel; and
a touch circuit configured to sense the plurality of touch electrodes by grouping the plurality of touch electrodes into a plurality of touch blocks, and control a greater number of touch electrodes to be sensed in a touch sensing block in which a touch is detected, among the plurality of touch blocks, than in a non-touch block in which no touch is detected, among the plurality of touch blocks.
2. The touch display device according to claim 1 , wherein the touch circuit applies a touch driving signal to the plurality of touch electrodes in the touch blocks, and determines a touch event and a touch position using touch sensing signals received from the plurality of touch electrodes.
3. The touch display device according to claim 2 , wherein the touch circuit is configured so that driving lines, through which the touch driving signal is applied, are the same as or are separate from sensing lines, through which the touch sensing signals are received.
4. The touch display device according to claim 1 , wherein all of the plurality of touch electrodes in the touch sensing block are continuously sensed.
5. The touch display device according to claim 1 , wherein the plurality of touch electrodes in the non-touch block are sensed at a ½ period.
6. The touch display device according to claim 5 , wherein the plurality of touch electrodes in the non-touch block are sensed so that odd touch electrodes and even touch electrodes are alternately sensed, or
an odd row of touch electrodes and an even row of touch electrodes are alternately sensed, or
an odd column of touch electrodes and an even column of touch electrodes are alternately sensed.
7. The touch display device according to claim 1 , wherein the plurality of touch electrodes in the non-touch block are sensed at a ¼ period so that four adjacent touch electrodes thereof are sequentially sensed.
8. The touch display device according to claim 1 , wherein the plurality of touch electrodes in the touch sensing block are sensed at a ½ period, and
the plurality of touch electrodes in the non-touch block are sensed at a ¼ period so that four adjacent touch electrodes thereof are sequentially sensed.
9. The touch display device according to claim 1 , wherein the sensing is controlled so that a greater number of the plurality of touch electrodes are sensed in the touch sensing block in an active mode of the display panel than in the touch sensing block in an idle mode of the display panel.
10. The touch display device according to claim 9 , wherein, in the active mode, the number of first touch electrodes sensed in the touch sensing block, among the plurality of touch electrodes, is different from the number of second touch electrodes sensed in the non-touch block, among the plurality of touch electrodes,
the number of first touch electrodes being greater than the number of second touch electrodes.
11. A touch driving method for a display panel, wherein a touchscreen panel including a plurality of touch electrodes arranged in a matrix form is embedded in the display panel, the touch driving method comprising:
sensing the plurality of touch electrodes by grouping the plurality of touch electrodes into a plurality of touch blocks;
determining a touch event in a touch block among the plurality of touch blocks; and
if the touch event is present as a result of the determination, controlling the sensing so that a greater number of touch electrodes which are sensed in a touch block in which a touch is detected, among the plurality of touch blocks, than in a touch block in which no touch is detected, among the plurality of touch blocks.