Input sensing device including sensor driver using compensation maps, display device having the same and input sensing method
An input sensing device includes a sensor that includes a plurality of first electrodes and a plurality of second electrodes, and a sensor driver that operates in a first sensing mode and a second sensing mode. During the first sensing mode, the sensor driver generates a first sensing signal by transmitting transmission signals to the sensor and receiving reception signals from the sensor. During the second sensing mode, the sensor driver generates a second sensing signal by transmitting the transmission signals to the sensor and receiving the reception signals from the sensor. The sensor driver selects one of a plurality of compensation maps based on the first sensing signal, compensates for the second sensing signal based on the selected compensation map, and outputs the compensated sensing signal.
1 . An input sensing device, comprising:
a sensor that includes a plurality of first electrodes and a plurality of second electrodes; and
a sensor driver that operates in a first sensing mode and a second sensing mode,
wherein, during the first sensing mode, the sensor driver generates a first sensing signal by transmitting transmission signals to the sensor and receiving first reception signals from the sensor,
wherein, during the second sensing mode, the sensor driver generates a second sensing signal by transmitting the transmission signals to the sensor and receiving second reception signals from the sensor, and
wherein the sensor driver selects one of a plurality of compensation maps based on the first sensing signal, compensates the second sensing signal based on the selected compensation map, and outputs a compensated sensing signal.
2 . The input sensing device of claim 1 , wherein the sensor driver generates the first sensing signal during a first sensing period of a first sensing frame, and generates the second sensing signal during a second sensing period of the first sensing frame.
3 . The input sensing device of claim 2 ,
wherein, during a first output frame, the sensor driver outputs a coordinate signal that corresponds to the compensated sensing signal,
wherein the first output frame temporally overlaps a second sensing frame, and
wherein the second sensing frame is continuous with the first sensing frame.
4 . The input sensing device of claim 1 , wherein the sensor driver comprises a compensator that selects one of the plurality of compensation maps based on the first sensing signal and outputs the compensated sensing signal based on the selected compensation map.
5 . The input sensing device of claim 4 ,
wherein the plurality of compensation maps comprises a plurality of first compensation maps and a plurality of second compensation maps, and
wherein the compensator selects one of the plurality of first compensation maps that corresponds to the first sensing signal, compensates the second sensing signal based on one of the plurality of second compensation maps that corresponds to the selected first compensation map, and outputs the compensated sensing signal.
6 . The input sensing device of claim 5 , wherein each of the plurality of first compensation maps stores a representative value of a sensing signal according to an ambient temperature, wherein the ambient temperature for each of the plurality of first compensation maps differ from each other.
7 . The input sensing device of claim 6 , wherein the compensator calculates a representative value of the first sensing signal, and selects one of the plurality of first compensation maps whose representative value is most similar to the representative value of the first sensing signal.
8 . The input sensing device of claim 5 , wherein the plurality of first compensation maps and the plurality of second compensation maps have a one-to-one correspondence.
9 . The input sensing device of claim 1 , wherein, during the first sensing mode, the sensor driver transmits first transmission signals to the plurality of first electrodes, transmits second transmission signals to the plurality of second electrodes, receives a first reception signal from the plurality of first electrodes, receives a second reception signal from the plurality of second electrodes, and generates the first sensing signal based on the first transmission signals, the second transmission signals, the first reception signal, and the second reception signal.
10 . The input sensing device of claim 1 , wherein, during the second sensing mode, the sensor driver transmits the transmission signals to the plurality of first electrodes, receives the second reception signals from the plurality of second electrodes, and generates the second sensing signal based on the second reception signals.
11 . The input sensing device of claim 1 ,
wherein the sensor includes a sensing area and a peripheral area adjacent to the sensing area,
wherein the plurality of first electrodes are arranged in the sensing area in a first direction, and
wherein the plurality of second electrodes are arranged in the sensing area in a second direction that crosses the first direction.
12 . The input sensing device of claim 11 , further comprising:
a plurality of first trace lines electrically connected to the plurality of first electrodes, respectively; and
a plurality of second trace lines electrically connected to the plurality of second electrodes, respectively,
wherein the plurality of first trace lines and the plurality of second trace lines overlap the sensing area.
13 . The input sensing device of claim 12 ,
wherein the plurality of first electrodes are connected to the plurality of first trace lines through a plurality of first contacts, respectively,
wherein the plurality of second electrodes are connected to the plurality of second trace lines through a plurality of second contacts, respectively, and
wherein the plurality of second contacts overlap the plurality of second electrodes, respectively.
14 . The input sensing device of claim 1 ,
wherein the sensor driver further comprises a lookup table that compensates a sensing signal received from the plurality of second electrodes, and
wherein the sensor driver compensates the second sensing signal based on the selected compensation map, performs a ghost compensation with reference to the lookup table, and outputs the compensated sensing signal.
15 . A display device, comprising:
a display panel;
a sensor disposed on the display panel and that includes a sensing area and a peripheral area adjacent to the sensing area; and
a sensor driver that drives the sensor,
wherein, during a first sensing mode, the sensor driver generates a first sensing signal by transmitting transmission signals to the sensor and receiving reception signals from the sensor,
wherein, during a second sensing mode, the sensor driver generates a second sensing signal by transmitting the transmission signals to the sensor and receiving the reception signals from the sensor, and
wherein the sensor driver selects one of a plurality of compensation maps based on the first sensing signal, compensates the second sensing signal based on the selected compensation map, and outputs a compensated sensing signal.
16 . The display device of claim 15 , wherein the sensor driver generates the first sensing signal during a first sensing period of a first sensing frame, and generates the second sensing signal during a second sensing period of the first sensing frame.
17 . The display device of claim 15 ,
wherein the plurality of compensation maps comprises a plurality of first compensation maps and a plurality of second compensation maps, and
wherein the sensor driver selects one of the plurality of first compensation maps that corresponds to the first sensing signal, compensates the second sensing signal based on one of the plurality of second compensation maps that corresponds to the selected first compensation map, and outputs the compensated sensing signal.
18 . The display device of claim 17 , wherein each of the plurality of first compensation maps stores a representative value of a sensing signal according to an ambient temperature, wherein the ambient temperature for each of the plurality of first compensation maps differ from each other.
19 . The display device of claim 18 , wherein the sensor driver calculates a representative value of the first sensing signal, and selects one of the plurality of first compensation maps whose representative value is most similar to the representative value of the first sensing signal.
20 . The display device of claim 15 , wherein the sensor comprises:
a plurality of first electrodes disposed in the sensing area and arranged in a first direction;
a plurality of second electrodes disposed in the sensing area and arranged in a second direction that crosses the first direction;
a plurality of first trace lines that connect the plurality of first electrodes to the sensor driver; and
a plurality of second trace lines that connect the plurality of second electrodes to the sensor driver.
21 . The display device of claim 20 ,
wherein the plurality of first electrodes are connected to the plurality of first trace lines through a plurality of first contacts, respectively,
wherein the plurality of second electrodes are connected to the plurality of second trace lines through a plurality of second contacts, respectively, and
wherein the plurality of second contacts overlap the plurality of second electrodes, respectively.
22 . The display device of claim 21 ,
wherein the sensor driver further comprises a lookup table that compensates a sensing signal received from the plurality of second electrodes, and
wherein the sensor driver compensates the second sensing signal based on the selected compensation map, performs a ghost compensation with reference to the lookup table, and outputs the compensated sensing signal.
23 . An input sensing method, the method comprising:
receiving a first sensing signal from a sensor by operating in a first sensing mode;
selecting a compensation map that corresponds to the first sensing signal from a plurality of compensation maps;
receiving a second sensing signal from the sensor by operating in a second sensing mode;
compensating the second sensing signal based on the compensation map and outputting a compensated sensing signal; and
outputting a coordinate signal that corresponds to the compensated sensing signal.
24 . The input sensing method of claim 23 ,
wherein the plurality of compensation maps comprises a plurality of first compensation maps and a plurality of second compensation maps, and
wherein selecting the compensation map that corresponds to the first sensing signal from the plurality of compensation maps comprises:
selecting one of the plurality of first compensation maps that corresponds to the first sensing signal, and selecting one of the plurality of second compensation maps that corresponds to the selected first compensation map as the compensation map.
25 . The input sensing method of claim 24 ,
wherein each of the plurality of first compensation maps stores a representative value of a sensing signal according to an ambient temperature, wherein the ambient temperature for each of the plurality of first compensation maps differ from each other, and
wherein selecting the compensation map that corresponds to the first sensing signal from the plurality of compensation maps comprises:
calculating a representative value of the first sensing signal and selecting one of the plurality of first compensation maps whose representative value is most similar to the representative value of the first sensing signal.