Touch display device and method of controlling same
A touch display device includes a touch panel having a plurality of touch electrodes and a plurality of signal lines. The touch electrodes are divided into two or more blocks, and touch electrodes belonging to different blocks is connected to one signal line. The touch display device can further include a touch sensing circuit configured to generate raw data based on voltages of the touch electrodes input through the signal lines and determine real touch data from the raw data. The touch sensing circuit predicts an area where the real touch data is able to be generated from raw data of one frame and determines the real touch data by reflecting ghost data generated in areas other than the area where the real touch data is able to be generated in estimated touch data included in the area where the real touch data is able to be generated.
1 . A touch display device comprising:
a touch panel including a plurality of touch electrodes arranged into a plurality of blocks such that each block includes multiple touch electrodes;
a plurality of signal lines, each signal line electrically connected to a respective touch electrode from two or more blocks such that each touch electrode in a block is electrically connected to another touch electrode in another block via a signal line; and
a touch sensing circuit configured to generate raw data based on voltages of the touch electrodes of the plurality of blocks input through the signal lines and determine real touch data from the raw data,
wherein the touch sensing circuit predicts an area where the real touch data is generated from raw data of one frame and determines the real touch data by reflecting ghost data generated in areas other than the area where the real touch data is generated in estimated touch data included in the area where the real touch data is able to be generated.
2 . The touch display device of claim 1 , wherein the estimated touch data and the ghost data share the signal lines.
3 . The touch display device of claim 1 , wherein, if all raw data included in a preset area in the raw data of one frame is equal to or greater than a reference value, the touch sensing circuit predicts the preset area as the area where the real touch data is able to be generated.
4 . The touch display device of claim 3 , wherein the touch sensing circuit determines the real touch data by adding the ghost data to the estimated touch data and then removing the ghost data.
5 . The touch display device of claim 3 , wherein, when two or more pieces of estimated touch data sharing a signal line are generated in an area where two or more pieces of real touch data are able to be generated, the touch sensing circuit divides the ghost data and adds the divided ghost data to the respective pieces of estimated touch data.
6 . The touch display device of claim 5 , wherein the touch sensing circuit sets a weight depending on values of raw data adjacent to each piece of estimated touch data, divides the ghost data according to the weight, and adds the ghost data to the estimated touch data.
7 . The touch display device of claim 1 , wherein, when estimated touch data sharing the signal lines is generated in all blocks, the touch sensing circuit maintains each piece of estimated touch data.
8 . The touch display device of claim 1 , wherein the touch sensing circuit comprises:
a touch driving circuit configured to convert voltage signals of the touch electrodes input through the signal lines into digital signals to generate raw data for each of the plurality of blocks; and
a touch controller configured to determine real touch data from the raw data and determine information on a position where a real touch input has occurred on the touch panel.
9 . The touch display device of claim 8 , wherein the touch driving circuit generates raw data for each of the touch electrodes connected to one signal line.
10 . The touch display device of claim 1 , wherein each block of the touch panel includes two or more touch electrode rows, and two or more touch electrodes included in the same touch electrode column are connected to one signal line.
11 . A method of controlling a touch display device including a touch panel having a plurality of touch electrodes arranged into a plurality of blocks such that each block includes multiple touch electrodes and a plurality of signal lines with each signal line electrically connected to a respective touch electrode from two or more blocks such that each touch electrode in a block is electrically connected to another touch electrode in another block via a signal line, the method comprising:
generating raw data of one frame based on voltages of the touch electrodes of the plurality of blocks input through the signal lines;
predicting an area in which all raw data included in a preset area in the raw data of one frame is equal to or greater than a reference value as an area where real touch data is able to be generated;
reflecting ghost data sharing a signal line with estimated touch data included in the area where the real touch data is generated, the ghost data being generated in an area other than the area where the real touch data is generated in the estimated touch data, and deleting the ghost data; and
determining the real touch data based on the estimated touch data.
12 . The method of claim 11 , wherein the reflecting the ghost data in the estimated touch data comprises:
when two or more pieces of estimated touch data are generated, dividing the ghost data and adding the divided ghost data to the respective pieces of estimated touch data.
13 . The method of claim 12 , wherein the dividing and adding the ghost data comprises:
setting a weight depending on values of raw data adjacent to each piece of estimated touch data; and
dividing the ghost data according to the weight and adding the divided ghost data.
14 . The method of claim 11 , further comprising:
when estimated touch data is generated in all blocks, maintaining each piece of estimated touch data.