Touch panel and image display device including the same
A touch panel includes a display region and conductive pad parts in which a portion thereof is exposed to a display region, wherein the conductive pad parts have a plurality of holes formed in at least a region including the exposed portion thereof. The touch panel is capable of significantly reducing an area of a non-display region, has excellent visibility of an image to be displayed by reducing visibility of a conductive pad part exposed in a display region, and has significantly reduced damage in a manufacturing process by preventing an occurrence or propagation of cracks.
1. A touch panel having a display region and a non-display region, the touch panel comprising:
touch sensing electrode pattern formed in the display region;
conductive pad parts each having a first part exposed in the display region and a second part formed in the non-display region, the conductive pad parts having a plurality of holes formed in at least the first part; and
position detecting lines connected to the touch sensing electrode patterns via the conductive pad parts to transfer a sensing signal to an external circuit,
wherein the first part of the conductive pad parts is connected with the touch sensing electrode patterns, and, the second part of the conductive pad parts is connected with the position sensing lines.
2. The touch panel according to claim 1 , wherein the plurality of holes are arranged in rows.
3. The touch panel according to claim 2 , wherein the plurality of holes are regularly or irregularly arranged.
4. The touch panel according to claim 1 , wherein a total area of the plurality of holes in the first parts of the conductive pad parts is 30% to 90%, relative to a total area of the first parts of the conductive pad parts.
5. The touch panel according to claim 1 , wherein the conductive pad part includes a groove.
6. The touch panel according to claim 5 , wherein the groove is formed in rows.
7. The touch panel according to claim 6 , wherein the groove is formed along a plurality of holes arranged in rows.
8. The touch panel according to claim 1 , wherein the conductive pad part is formed of a material including at least one of a metal, a conductive metal oxide, and a conductive carbon.
9. The touch panel according to claim 1 , wherein the conductive pad part includes a metallic core part and a conductive nonmetallic coating layer formed on the metallic core part.
10. The touch panel according to claim 9 , wherein the metallic core part is formed to include a plurality of layers.
11. The touch panel according to claim 9 , wherein the conductive nonmetallic coating layer is formed to include a plurality of layers.
12. The touch panel according to claim 1 , wherein the conductive pad part further includes an insulation layer on an upper side thereof.
13. The touch panel according to claim 12 , wherein the insulation layer is formed to include a plurality of layers.
14. The touch panel according to claim 1 , wherein a portion of the position sensing lines is exposed in the display region, and the other portion of the position sensing lines is formed in the non-display region, and the position sensing lines have a plurality of holes formed in at least a region including the exposed portion thereof.
15. The touch panel according to claim 1 , further comprising dummy parts adjacent to the conductive pad parts, wherein a portion of the dummy parts is exposed in the display region, and a plurality of holes are formed in at least a region including the exposed portion thereof.
16. An image display device comprising the touch panel according to claim 1 .
17. The image display device according to claim 16 , wherein the image display device is selected from the group consisting of a liquid crystal display (LCD), field emission display, plasma display panel, organic light emitting diode and a touch screen.