Touch panel and display device using the same

• US 8,605,045 B2
• Filed: 10/20/2010
• Issued: 12/10/2013
• Est. Priority Date: 10/21/2009
• Status: Active Grant

• Current Assignee: Paneltouch Technologies LLC (Touch Display LLC)
• Original Assignee: Hitachi Displays Limited (Japan Display Incorporated), Panasonic Liquid Crystal Display Company Limited (Panasonic Holdings Corporation)
• Inventors: Mamba, Norio, Nagata, Koji, Sekiguchi, Shinji, Hayakawa, Koji
• Primary Examiner(s): PHAM, VIET DAVID
• Application Number:
  US12/908,263
• Publication Number:
  US 20110090175A1
• Time in Patent Office: 1,147 Days
• Field of Search: 345156-173
• US Class Current: 345/173
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/0445 using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer
• CPC Class Codes: G06F 3/0446 using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes
• CPC Class Codes: G06F 3/0447 Position sensing using the local deformation of sensor cells

Abstract

Provided is a capacitive touch panel, including: a plurality of coordinate detection electrodes (XP1, XP2, YP2) for detecting X-Y position coordinates; a first substrate (1) including the plurality of coordinate detection electrodes; and a second substrate (6) disposed to be opposed to the first substrate, in which: one of the first substrate and the second substrate includes an elastic layer lower (5) in rigidity than the second substrate and a conductive layer (ZP) having conductivity; the elastic layer and the conductive layer are disposed between the plurality of coordinate detection electrodes and the second substrate; a space between the first substrate and the second substrate defined by a plurality of nonconductive spacers (4); and an antireflective layer is formed on at least one of an interface between the space and the first substrate and an interface between the space and the second substrate.

Claims

1. A capacitive touch panel, comprising:

a plurality of coordinate detection electrodes for detecting X-Y position coordinates;

a first substrate including the plurality of coordinate detection electrodes; and

a second substrate disposed to be opposed to the first substrate,

wherein the second substrate includes, on the first substrate side, an elastic layer that is lower in rigidity than the second substrate and a conductive layer having conductivity,

wherein the plurality of coordinate detection electrodes and the conductive layer sandwich a plurality of nonconductive spacers formed at intervals in a plane direction of the first substrate and the second substrate,

wherein the capacitive touch panel further comprises an antireflective layer formed on at least one of an interface between the first substrate and a space defined by the plurality of nonconductive spacers and an interface between the second substrate and the space defined by the plurality of nonconductive spacers; and

wherein the antireflective layer is configured to prevent electrical contact between the coordinate detection electrodes and the conductive layer.

2. The capacitive touch panel according to claim 1, wherein the antireflective layer is made of an insulating material and comprises an antireflective laminated body including at least one high refractive thin film layer and at least one low refractive thin film layer which are alternately laminated.

3. The capacitive touch panel according to claim 1, wherein the conductive layer is formed closer to the first substrate with respect to the elastic layer.

4. The capacitive touch panel according to claim 1, further comprising a nonconductive layer that is higher in rigidity than the elastic layer, the nonconductive layer being formed closer to the first substrate with respect to the elastic layer,

wherein the conductive layer is formed on the first substrate side of the nonconductive layer.

5. The capacitive touch panel according to claim 1, further comprising a nonconductive layer that is higher in rigidity than the elastic layer, the nonconductive layer being formed closer to the first substrate with respect to the elastic layer,

wherein the conductive layer is formed between the elastic layer and the nonconductive layer.

6. The capacitive touch panel according to claim 1,

wherein the antireflective layer is configured without holes therethrough and is formed closer to the second substrate with respect to the plurality of coordinate detection electrodes, and

wherein the antireflective layer is formed in a manner that one surface of the antireflective layer is in contact with the plurality of nonconductive spacers and another surface of the antireflective layer is in contact with the plurality of coordinate detection electrodes.

17. The capacitive touch panel according to claim 1, wherein the first substrate, the second substrate, the elastic layer, and the conductive layer are transparent.

28. A display device, comprising:

a display panel including a display part; and

the capacitive touch panel according to claim 1, which is disposed on a display surface side of the display panel.

29. The display device according to claim 28, wherein the capacitive touch panel comprises an antireflective layer formed on at least one of surfaces of the first substrate and the second substrate which are disposed to be opposed to each other, the surfaces being opposite to surfaces opposed to each other.

7. A capacitive touch panel, comprising a first substrate and a second substrate which are disposed to be opposed to each other across a plurality of nonconductive spacers,

wherein the first substrate includes:

first signal lines each extending in a direction of a y-axis and being arranged in parallel with one another in a direction of an x-axis;

second signal lines each extending in the direction of the x-axis and being arranged in parallel with one another in the direction of the y-axis;

a first coordinate detection electrode that is formed in an area divided by the first signal lines and the second signal lines, and connected to the one of the first signal lines; and

a second coordinate detection electrode that is formed in the same layer as the first coordinate detection electrode, and connected to the one of the second signal lines,

wherein the first substrate includes an elastic layer that is lower in rigidity than the second substrate and a conductive layer having conductivity, the elastic layer and the conductive layer being formed closer to an opposed surface of the first substrate with respect to the first coordinate detection electrode and the second coordinate detection electrode,

wherein the capacitive touch panel further comprises an antireflective layer formed on at least one of an interface between the first substrate and a space defined by the plurality of nonconductive spacers and an interface between the second substrate and the space defined by the plurality of nonconductive spacers; and

wherein the antireflective layer is configured to prevent electrical contact between the first and second coordinate detection electrodes and the conductive layer.

9. The capacitive touch panel according to claim 7, wherein the antireflective film is made of an insulating material and comprises an antireflective laminated body including at least one high refractive thin film layer and at least one low refractive thin film layer which are alternately laminated.

10. The capacitive touch panel according to claim 7, wherein the conductive layer is formed closer to the second substrate with respect to the elastic layer.

11. The capacitive touch panel according to claim 7, further comprising a nonconductive layer that is higher in rigidity than the elastic layer, the nonconductive layer being formed closer to the second substrate with respect to the elastic layer,

wherein the conductive layer is formed on the second substrate side of the nonconductive layer.

12. The capacitive touch panel according to claim 7, further comprising a nonconductive layer that is higher in rigidity than the elastic layer, the nonconductive layer being formed closer to the second substrate with respect to the elastic layer,

wherein the conductive layer is formed between the elastic layer and the nonconductive layer.

13. The capacitive touch panel according to claim 7, wherein the elastic layer and the conductive layer are formed in the same layer.

14. The capacitive touch panel according to claim 7, wherein the elastic layer has a thickness larger than a distance defined by the plurality of nonconductive spacers between the first substrate and the second substrate.

15. The capacitive touch panel according to claim 7, wherein the plurality of nonconductive spacers comprise protrusions formed on at least one of the first substrate and the second substrate.

16. The capacitive touch panel according to claim 7, wherein the plurality of nonconductive spacers are disposed at intervals of equal to or larger than 20 μ

m and equal to or smaller than 10,000 μ

m.

26. The capacitive touch panel according to claim 7, wherein the first substrate, the second substrate, the elastic layer, and the conductive layer are transparent.

30. A display device, comprising:

a display panel including a display part; and

the capacitive touch panel according to claim 7, which is disposed on a display surface side of the display panel.

31. The display device according to claim 30, wherein the capacitive touch panel comprises an antireflective layer formed on at least one of surfaces of the first substrate and the second substrate which are disposed to be opposed to each other, the surfaces being opposite to surfaces opposed to each other.

8. A capacitive touch panel, comprising:

a first substrate;

a coordinate detection electrode for detecting X-Y position coordinates, the coordinate detection electrode being provided on the first substrate; and

a second substrate disposed to be opposed to the first substrate,

wherein the first substrate includes an elastic layer that is lower in rigidity than the second substrate and a conductive layer having conductivity, the elastic layer and the conductive layer being formed closer to the second substrate with respect to the coordinate detection electrode,

wherein the second substrate and the conductive layer sandwich a plurality of nonconductive spacers formed at intervals in a plane direction of the first substrate and the second substrate,

wherein the capacitive touch panel further comprises an antireflective layer formed on at least one of an interface between the first substrate and a space defined by the plurality of nonconductive spacers and an interface between the second substrate and the space defined by the plurality of nonconductive spacers; and

wherein the antireflective layer is configured to prevent electrical contact between the coordinate detection electrode and the conductive layer.

18. The capacitive touch panel according to claim 8, wherein the antireflective layer is made of an insulating material and comprises an antireflective laminated body including at least one high refractive thin film layer and at least one low refractive thin film layer which are alternately laminated.

19. The capacitive touch panel according to claim 8, wherein the conductive layer is formed closer to the second substrate with respect to the elastic layer.

20. The capacitive touch panel according to claim 8, further comprising a nonconductive layer that is higher in rigidity than the elastic layer, the nonconductive layer being formed closer to the second substrate with respect to the elastic layer,

wherein the conductive layer is formed on the second substrate side of the nonconductive layer.

21. The capacitive touch panel according to claim 8, further comprising a nonconductive layer that is higher in rigidity than the elastic layer, the nonconductive layer being formed closer to the second substrate with respect to the elastic layer,

wherein the conductive layer is formed between the elastic layer and the nonconductive layer.

22. The capacitive touch panel according to claim 8, wherein the elastic layer and the conductive layer are formed in the same layer.

23. The capacitive touch panel according to claim 8, wherein the elastic layer has a thickness larger than a distance defined by the plurality of nonconductive spacers between the first substrate and the second substrate.

24. The capacitive touch panel according to claim 8, wherein the plurality of nonconductive spacers comprise protrusions formed on one of the first substrate and the second substrate.

25. The capacitive touch panel according to claim 8, wherein the plurality of nonconductive spacers are disposed at intervals of equal to or larger than 20 μ

m and equal to or smaller than 10,000 μ

m.

27. The capacitive touch panel according to claim 8, wherein the first substrate, the second substrate, the elastic layer, and the conductive layer are transparent.

32. A display device, comprising:

a display panel including a display part; and

the capacitive touch panel according to claim 8, which is disposed on a display surface side of the display panel.

33. The display device according to claim 32, wherein the capacitive touch panel comprises an antireflective layer formed on at least one of surfaces of the first substrate and the second substrate which are disposed to be opposed to each other, the surfaces being opposite to surfaces opposed to each other.