Touch screen panel and driving method thereof
A touch screen panel includes a plurality of driving electrodes, a plurality of sensing electrodes crossing the driving electrodes, a driver for supplying a driving signal to the driving electrodes in a touch recognizing mode, and a controller for receiving signals from the sensing electrodes. In a noise measuring mode, the controller is configured to cut off an electrical connection between one of the driving electrodes and the driver or between one of the sensing electrodes and the controller, maintain an electrical connection between another one of the sensing electrodes and the controller, and detect a noise signal from the other one of the sensing electrodes. The touch screen panel and a driving method of the touch screen panel can increase or maximize the reception sensitivity of outside noise.
1. A touch screen panel comprising:
a plurality of driving electrodes;
a plurality of sensing electrodes crossing the driving electrodes;
a driver for supplying a driving signal to the driving electrodes in a touch recognizing mode;
a controller for receiving signals from the sensing electrodes;
first switches between respective ones of the driving electrodes and the driver;
second switches between respective ones of the sensing electrodes and the controller;
a common line;
third switches between the common line and respective common nodes between the respective ones of the driving electrodes and the first switches; and
fourth switches between the common line and respective common nodes between the respective ones of the sensing electrodes and the second switches,
wherein, in a noise measuring mode, the controller is configured to
cut off an electrical connection between one of the driving electrodes and the driver or between one of the sensing electrodes and the controller,
maintain an electrical connection between another one of the sensing electrodes and the controller,
detect a noise signal from the other one of the sensing electrodes,
turn on the third and fourth switches,
turn off the first switches, and
turn off all but one of the second switches.
2. The touch screen panel according to claim 1 , wherein, in the touch recognizing mode, the controller is configured to turn on the first switches.
3. The touch screen panel according to claim 1 , wherein, in the touch recognizing mode, the controller is configured to turn on the second switches.
4. The touch screen panel according to claim 1 , wherein, in the noise measuring mode, the controller is further configured to
turn off one of the first switches, and
turn off one of the second switches.
5. The touch screen panel according to claim 4 , wherein, in the touch recognizing mode, the controller is configured to turn on the first and second switches.
6. The touch screen panel according to claim 1 , wherein, in the touch recognizing mode, the controller is configured to
turn on the first and second switches, and
turn off the third and fourth switches.
7. A driving method of a touch screen panel, the method comprising:
cutting off an electrical connection between one of a plurality of driving electrodes and a driver or between one of a plurality of sensing electrodes and a controller, when the touch screen panel is in a noise measuring mode;
maintaining an electrical connection between another one of the sensing electrodes and the controller during the noise measuring mode;
and
detecting a noise signal output from the other one of the sensing electrodes during the noise measuring mode,
wherein the touch screen panel comprises:
first switches between respective ones of the driving electrodes and the driver;
second switches between respective ones of the sensing electrodes and the controller;
third switches between a common line and respective common nodes between the respective ones of the driving electrodes and the first switches; and
fourth switches between the common line and respective common nodes between the respective ones of the sensing electrodes and the second switches,
wherein the method further comprises turning on the third and fourth switches during the noise measuring mode, and
wherein the cutting off of the electrical connection further comprises:
turning off the first switches; and
turning off all but one of the second switches.
8. The method according to claim 7 , wherein the cutting off of the electrical connection comprises:
turning off one of the first switches; and
turning off one of the second switches.
9. The method according to claim 8 , further comprising turning on the first and second switches when the touch screen panel is in a touch recognizing mode after the noise measuring mode.
10. The method according to claim 9 , further comprising supplying a driving signal from the driver to the driving electrodes during the touch recognizing mode.
11. The method according to claim 7 , further comprising turning on the first and second switches and turning off the third and fourth switches when the touch screen panel is in a touch recognizing mode after the noise measuring mode.