Digital resistive type touch panel and fabrication method thereof
View Patent ↗A display device integrated with a touch panel is disclosed, which can use various types of input devices. Thus, in addition to conductive devices, a gloved hand or a non-conductive stylus pen can be used as an input. The touch panel includes a supporting substrate; a first transparent conductive layer having a first electrode for applying a voltage to the supporting substrate; a second transparent conductive layer having a second electrode and facing the first transparent conductive layer; an adhesive for attaching the first and second transparent conductive layers to each other; and a passivation film on an outer surface of the second transparent conductive layer.
1. A capacitive-type touch panel comprising:
a supporting substrate;
a first transparent conductive layer on an entire inner surface of the supporting substrate;
a first electrode on the first transparent conductive layer for applying a voltage having a high frequency to the first transparent conductive layer, wherein the first electrode is metal and is formed at each of four corners of the first transparent conductive layer;
a second transparent conductive layer facing the first transparent conductive layer;
a second electrode on an inner surface of the second transparent conductive layer, the second electrode formed at a corner of the second transparent conductive layer and connected to an external ground voltage or a metal shielding plate;
an adhesive between the first and second transparent conductive layers; and
a passivation film on an outer surface of the second transparent conductive layer.
2. The touch panel of claim 1 , further comprising a plurality of dot spacers formed at fixed intervals on the first transparent conductive layer.
3. The touch panel of claim 1 , further comprising a transparent conductive layer formed below the supporting substrate.
4. The touch panel of claim 1 , wherein the adhesive is formed along a circumference of the first and second transparent conductive layers.
5. The touch panel of claim 4 , wherein the adhesive includes an insulating material.
6. The touch panel of claim 1 , wherein the supporting substrate includes a glass.
7. The touch panel of claim 1 , wherein the supporting substrate is a transparent film.
8. The touch panel of claim 1 , wherein the passivation film is formed of a transparent plastic material.
9. The touch panel of claim 8 , wherein the passivation film is a Polyethylene Terephtalate film.
10. The touch panel of claim 1 , further comprising a current sensor connected to the first electrode.
11. A fabrication method of a capacitive-type touch panel comprising:
providing a supporting substrate;
forming a first transparent conductive layer on an entire inner surface of the supporting substrate;
forming a first metal electrode at each of four corners of the first transparent conductive layer for applying a voltage having a high frequency to the first transparent conductive layer;
forming a second transparent conductive layer facing the first transparent conductive layer;
forming a second metal electrode on an inner surface of the second transparent conductive layer, the second metal electrode formed at a corner of the second transparent conductive layer and connected to an external ground voltage or a metal shielding plate;
attaching the first and second transparent conductive layers to each other using an adhesive; and
forming a passivation film on an outer surface of the second transparent conductive layer.
12. The method of claim 11 , further comprising, forming a plurality of dot spacers at fixed intervals on the first transparent conductive layer.
13. The method of claim 11 , further comprising, forming a transparent conductive layer below the supporting substrate.
14. The method of claim 11 , wherein the adhesive is formed along a circumference of the first and second transparent conductive layers.
15. The method of claim 11 , wherein the supporting substrate is a glass or a film.
16. The method of claim 11 , wherein the passivation film is a Polyethylene Terephtalate film.
17. The method of claim 11 , further comprising a current sensor connected to the first electrode.
18. A liquid crystal display device integrated with a capacitive-type touch panel comprising:
the capacitive-type touch panel comprising:
a supporting substrate having first and second surfaces,
a first transparent conductive layer on the entire first surface of the supporting substrate, the first transparent conductive layer having a first electrode for applying a voltage to the first transparent conductive layer, wherein the first electrode is metal and is formed at each of four corners of the first transparent conductive layer,
a second transparent conductive layer facing the first transparent conductive layer,
a second electrode on an inner surface of the second transparent conductive layer, the second electrode formed at a corner of the second transparent conductive layer and connected to an external ground voltage or a metal shielding plate,
an adhesive between the first and second transparent conductive layers, and
a passivation film on an outer surface of the second transparent conductive layer; and
the liquid crystal display device on the second surface of the supporting substrate of the touch panel, the liquid crystal display device comprising:
a first substrate having a plurality of thin film transistors,
a second substrate having a color filter and facing the first substrate, and
a liquid crystal layer between the first and second substrates.
19. The device of claim 18 , further comprising a plurality of dot spacers formed at fixed intervals on the first transparent conductive layer.
20. The device of claim 18 , wherein the adhesive is formed along a circumference of the first and second transparent conductive layers.
21. The device of claim 20 , wherein the adhesive includes an insulating material.
22. The device of claim 18 , wherein the supporting substrate includes a glass.
23. The device of claim 18 , wherein the passivation film is formed of a transparent plastic material.
24. The device of claim 23 , wherein the passivation film is a Polyethylene Terephtalate film.
25. The device of claim 18 , further comprising a current sensor connected to the first electrode.
26. A method for fabricating a liquid crystal display device integrated with a capacitive-type touch panel comprising:
providing a supporting substrate having first and second surfaces;
forming a first transparent conductive layer on the entire first surface of the supporting substrate, the first transparent conductive layer having a first electrode for applying a voltage having a high frequency to the first transparent conductive layer, wherein the first electrode is metal at each of four corners of the first transparent conductive layer;
forming a second transparent conductive layer facing the first transparent conductive layer;
forming a second electrode on an inner surface of the second transparent conductive layer, the second electrode formed at a corner of the second transparent conductive layer and connected to an external ground voltage or a metal shielding plate;
attaching the first and second transparent conductive layers to each other using an adhesive;
forming a passivation film on an outer surface of the second transparent conductive layer; and forming the liquid crystal display device on the second surface of the supporting substrate of the touch panel, the method for fabricating the liquid crystal display device comprising:
preparing a first substrate having a plurality of thin film transistors, preparing a second substrate having a color filter and facing the first substrate, and
providing a liquid crystal layer between the first and second substrates.
27. The method of claim 26 , further comprising, forming a plurality of dot spacers at fixed intervals on the first transparent conductive layer.
28. The method of claim 26 , further comprising, forming a transparent conductive layer below the supporting substrate.
29. The method of claim 26 , wherein the adhesive is formed along a circumference of the first and second transparent conductive layers.
30. The method of claim 26 , wherein supporting substrate is a glass or a film.
31. The method of claim 26 , wherein the passivation film is a Polyethylene Terephtalate film.
32. The method of claim 26 , further comprising a current sensor connected to the first electrode.