Resistance film type touch panel with short circuit preventing structure

• US 6,791,535 B2
• Filed: 12/21/2000
• Issued: 09/14/2004
• Est. Priority Date: 12/22/1999
• Status: Active Grant

• Current Assignee: HTC Corporation
• Original Assignee: NEC Corporation
• Inventors: Suzuki, Daisuke
• Primary Examiner(s): Hjerpe, Richard
• Assistant Examiner(s): NGUYEN, KIMNHUNG T
• Application Number:
  US09/740,820
• Publication Number:
  US 20010005200A1
• Time in Patent Office: 1,363 Days
• Field of Search: 345/173, 345/174, 345/179, 345/175, 257/40, 257/59
• US Class Current: 345/173
• CPC Class Codes: G06F 3/045 using resistive elements, e.g. a single continuous surface or two parallel surfaces put in contact

Abstract

A resistance film type touch panel includes first and second substrates opposing to each other, and respectively having panel planes. A first electrode film is formed in a central portion of the panel plane of the first substrate on a lower surface of the first substrate, and a second electrode film is formed in a central portion of the panel plane of the second substrate on an upper surface of the second substrate. First and second electrodes are connected to the first electrode film and are formed to oppose to each other around the first electrode film on the lower surface of the first substrate. Third and fourth electrodes are connected to the second electrode film and are formed to oppose to each other around the second electrode film on the upper surface of the second substrate orthogonally to the first and second electrodes. First to fourth wiring lines connect the first to fourth electrodes to connection terminals, respectively. An insulating resin film is formed to cover the first and second wiring lines.

Claims

1. A resistance film type touch panel comprising:

first and second substrates opposing each other, and respectively having panel planes;

a first electrode film formed in a central portion of said panel plane of said first substrate on a lower surface of said first substrate;

a second electrode film formed in a central portion of said panel plane of said second substrate on an upper surface of said second substrate;

first and second electrodes connected to said first electrode film and formed to oppose each other around said first electrode film on the lower surface of said first substrate;

third and fourth electrodes connected to said second electrode film and formed to oppose each other around said second electrode film on the upper surface of said second substrate orthogonally to said first and second electrodes;

first to fourth wiring lines respectively connecting said first to fourth electrodes to connection terminals;

an insulating resin film formed to cover said first and second wiring lines, said insulating resin film (14) preventing the first electrode film (4) from contacting the second electrode film (13).

2. The resistance film type touch panel according to claim 1, wherein each of said first and second wiring lines is provided to have distances from edges of said first substrate.

3. The resistance film type touch panel according to claim 2, wherein said insulating resin film extends to said edges of said first substrate to cover said first and second wiring lines.

4. The resistance film type touch panel according to claim 1, wherein said insulating resin film is formed to cover said first and second electrodes in addition to said first and second wiring lines.

5. The resistance film type touch panel according to claim 4, wherein said insulating resin film is formed to cover a peripheral portion of said first electrode film in addition to said first and second electrodes.

6. The resistance film type touch panel according to claim 1, wherein said fourth electrode is formed on a lower surface of said insulating resin film directly beneath said first wiring line.

7. The resistance film type touch panel according to claim 1, wherein said fourth electrode is formed on a lower surface of said insulating resin film between said first wiring line and an end of said first electrode film.

8. The resistance film type touch panel according to claim 1, wherein said first substrate includes a PET layer and an anchor film formed on a lower surface of said PET layer.

9. The resistance film type touch panel according to claim 1, wherein said insulating resin film is transparent.

10. A resistance film type touch panel comprising:

first and second substrates opposing each other, and respectively having panel planes;

a first electrode film formed in a central portion of said panel plane of said first substrate on a lower surface of said first substrate;

a second electrode film formed in a central portion of said panel plane of said second substrate on an upper surface of said second substrate;

first and second electrodes connected to said first electrode film and formed to oppose each other around said first electrode film on the lower surface of said first substrate;

third and fourth electrodes connected to said second electrode film and formed to oppose each other around said second electrode film on the upper surface of said second substrate orthogonally to said first and second electrodes;

first to fourth wiring lines respectively connecting said first to fourth electrodes to connection terminals;

an insulating resin film formed to cover said first and second electrodes and said first and second wiring lines, said insulating resin film preventing the first electrode film from contacting the second electrode film.

11. The resistance film type touch panel according to claim 10, wherein each of said first and second wiring lines is provided to have distances from edges of said first substrate.

12. The resistance film type touch panel according to claim 11, wherein said insulating resin film extends to said edges of said first substrate to cover said first and second wiring lines.

13. The resistance film type touch panel according to claim 10, wherein said insulating resin film is formed to cover a peripheral portion of said first electrode film in addition to said first and second electrodes.

14. The resistance film type touch panel according to claim 10, wherein said fourth electrode is formed on a lower surface of said insulating resin film directly beneath said first wiring line.

15. The resistance film type touch panel according to claim 10, wherein said fourth electrode is formed on a lower surface of said insulating resin film between said first wiring line and an end of said first electrode film.

16. The resistance film type touch panel according to claim 10, wherein said first substrate includes a PET layer and an anchor film formed on a lower surface of said PET layer.

17. The resistance film type touch panel according to claim 10, wherein said insulating resin film is transparent.

18. A resistance film type touch panel comprising:

a first electrode film formed in a central portion of a first panel plane;

a second electrode film formed in a central portion of a second panel plane;

first and second electrodes connected to said first electrode film and opposing each other around said first electrode film;

third and fourth electrodes connected to said second electrode film and opposing each other around said second electrode film orthogonally to said first and second electrodes;

first to fourth wiring lines respectively connecting said first to fourth electrodes to connection terminals;

an insulating resin film covering said first and second wiring lines, and optionally covering said first and second electrodes, said insulating resin film preventing the first electrode film from contacting the second electrode film.

19. The resistance film type touch panel of claim 18, wherein the first and second panel planes are included in respective first and second substrates opposing each other.

20. The resistance film type touch panel of claim 18, wherein the insulating resin film covers the first and second electrodes.

21. An insulating resin film structure in a resistance film type touch panel, comprising:

an insulating resin film covering at least first and second wiring lines, and optionally covering first and second electrodes, wherein;

(i) the resistance film type touch panel includes first to fourth wiring lines respectively connecting first to fourth electrodes to connection terminals;

(ii) the first and second electrodes are connected to a first electrode film and oppose each other around said first electrode film, wherein said insulating resin film prevents the first electrode film from contacting a second electrode film.

22. An insulating resin film structure according to claim 21, wherein the third and fourth electrodes are connected to a second electrode film and oppose each other around said second electrode film orthogonally to said first and second electrodes.

23. An insulating resin film structure according to claim 22, wherein the first electrode film is formed in a central portion of a first panel plane in a first substrate, and the second electrode film is formed in a central portion of a second panel plane in a second substrate.