The first electrode extension part of the first electrode unit 210 may include a first vertical part 210g1, which may be provided in parallel with the second axis (Y) direction between the first connection part 210b and the second connection part 210f, a first diagonal part 210g2, which may be provided between the first vertical part 210g1 and the second connection part 210f and may have a width which corresponds to the first axis (X) direction and increases progressively closer to the second axis (Y) direction, a first protrusion 210e, which may be separated from the second region 210d in the second axis (Y) direction, provided outside the first electrode unit 210 with respect to the second axis Y, connected to the first diagonal part 210g2, and provided to protrude in the first axis (X) direction, a second protrusion 210h, which may be provided outside the first region 210a in a fourth axis (?Y) direction opposite to the second axis (Y) direction, and a second diagonal part 210c, which may be provided between the second protrusion 210h and the first vertical part 210g1 of the first electrode extension part and may have a width which corresponds to the first axis (X) direction and increases progressively closer to the fourth axis (?Y) direction.
The second diagonal part 210c may be provided to be connected to the second protrusion 210h. Start points of the first diagonal part 210g2 and the second diagonal part 210c may be positions corresponding to an upper end and a lower end of the first region 210a of the first electrode unit 210, but are not limited thereto.