Touch screen apparatus having additional sensing electrode located in non-active area

1. A touch screen apparatus comprising:

a first substrate having an active area and a non-active area outside the active area;

a second substrate spaced from the first substrate by a seal member;

first sensing electrodes arranged along a first direction in the active area;

second sensing electrodes arranged along a second direction intersecting the first direction in the active area, the second sensing electrodes being insulated from the first sensing electrodes;

at least one first additional sensing electrode arranged along the first direction in the non-active area, and separated from the first and second sensing electrodes;

at least one second additional sensing electrode arranged along the second direction in the non-active area, and separated from the first and second sensing electrodes, the at least one second additional sensing electrode overlapping with the seal member; and

connection lines connecting each of the first sensing electrodes, the second sensing electrodes, the at least one first additional sensing electrode, and the at least one second additional sensing electrode to a touch controller,

wherein a portion of the at least one first additional sensing electrode overlaps with a portion of at least one of the connection lines, and an insulating layer is provided between the portion of the at least one first additional sensing electrode and the connection lines which overlap each other.

2. The touch screen apparatus of claim 1 , further comprising an active touch pen that generates a driving signal for a touch input.

3. The touch screen apparatus of claim 2 , wherein the touch controller is configured to a touch position, based on a sensing signal provided from the at least one first and second additional sensing electrodes, the sensing signal corresponding to the driving signal.

4. The touch screen apparatus of claim 1 , wherein the at least one second additional sensing electrode is located outwardly from the connection lines.

5. The touch screen apparatus of claim 1 , wherein the at least one second additional sensing electrode is located between the connection lines.

6. The touch screen apparatus of claim 1 , wherein the first sensing electrodes, the second sensing electrodes, the at least one first additional sensing electrode, and the at least one second additional sensing electrode are formed on the first substrate of a display panel.

7. The touch screen apparatus of claim 6 , wherein the active area comprises a display area of the display panel, and the non-active area comprises a non-display area of the display panel.

8. The touch screen apparatus of claim 7 , wherein the at least one second additional sensing electrode overlaps with an area in which the seal member is connected to the first substrate and the second substrate.

9. The touch screen apparatus of claim 8 , wherein the first sensing electrodes, the second sensing electrodes, the at least one first additional sensing electrode, and the at least one second additional sensing electrode are formed of a transparent electrode material.

10. The touch screen apparatus of claim 1 , wherein each of the at least one first additional sensing electrode, and the at least one second additional sensing electrode has a substantially bar-like shape extending along one side of the non-active area.

11. The touch screen apparatus of claim 1 , wherein each of the at least one first additional sensing electrode, and the at least one second additional sensing electrode has a width narrower than that of the first and second sensinq electrodes.

12. The touch screen apparatus of claim 1 , wherein the at least one first additional sensing electrode and the at least one second additional sensing electrode surround the outer periphery of the active area.

13. The touch screen apparatus of claim 1 , wherein the at least one first additional sensing electrode and the at least one second additional sensing electrode substantially surround the outer periphery of the active area.

14. The touch screen apparatus of claim 1 , wherein each of the at least one first additional sensing electrode and the at least one second additional sensing electrode is separated from the first and second sensing electrodes in a plan view.

15. A touch screen apparatus comprising:

an active area and a non-active area outside the active area;

first sensing electrodes arranged along a first direction in the active area;

second sensing electrodes arranged along a second direction intersecting the first direction in the active area, the second sensing electrodes being insulated from the first sensing electrodes;

at least one additional sensing electrode located in the non-active area, and separated from the first and second sensing electrodes; and

connection lines extending from each of first sensing electrodes, the second sensing electrodes, and the additional sensing electrode, the additional sensing electrode being located between two of the connection line,

wherein a portion of the additional sensing electrode overlaps with a portion of at least one of the connection lines, and an insulating layer is provided between the portion of the additional sensing electrode and the connection lines which overlap each other.