Conductive laminate body, touch panel, and display device

• US 9,591,743 B2
• Filed: 12/11/2013
• Issued: 03/07/2017
• Est. Priority Date: 07/11/2011
• Status: Active Grant

• Current Assignee: Fujifilm Corporation (Fujifilm Holdings Corporation)
• Original Assignee: Fujifilm Corporation (Fujifilm Holdings Corporation)
• Inventors: Iwami, Kazuchika
• Primary Examiner(s): Mercedes, Dismery
• Application Number:
  US14/103,448
• Publication Number:
  US 20140098307A1
• Time in Patent Office: 1,182 Days
• Field of Search: None
• US Class Current: 1/1
• CPC Class Codes: B32B 15/02 Layer formed of wires, e.g. mesh
• CPC Class Codes: B32B 15/08 of synthetic resin
• CPC Class Codes: B32B 2307/20 having particular electrical or magnetic properties, e.g. piezoelectric
• CPC Class Codes: B32B 2307/202 Conductive
• CPC Class Codes: B32B 2307/208 Magnetic, paramagnetic
• CPC Class Codes: B32B 2307/412 Transparent
• CPC Class Codes: B32B 27/302 comprising aromatic vinyl (co)polymers, e.g. styrenic (co)polymers
• CPC Class Codes: B32B 27/304 comprising vinyl halide (co)polymers, e.g. PVC, PVDC, PVF, PVDF
• CPC Class Codes: B32B 27/36 comprising polyesters
• CPC Class Codes: B32B 7/12 using interposed adhesives or interposed materials with bonding properties
• CPC Class Codes: G02B 5/1814 structurally combined with one or more further optical elements, e.g. lenses, mirrors, prisms or other diffraction gratings G02B5/189 takes precedence
• CPC Class Codes: G06F 2203/04103 Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
• CPC Class Codes: G06F 2203/04112 Electrode mesh in capacitive digitiser: electrode for touch sensing is formed of a mesh of very fine, normally metallic, interconnected lines that are almost invisible to see. This provides a quite large but transparent electrode surface, without need for ITO or similar transparent conductive material
• CPC Class Codes: G06F 3/041 Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
• 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: G09G 2320/0233 Improving the luminance or brightness uniformity across the screen
• CPC Class Codes: G09G 2320/0626 for control of overall brightness
• CPC Class Codes: G09G 2320/0653 Controlling or limiting the speed of brightness adjustment of the illumination source
• CPC Class Codes: G09G 2320/103 Detection of image changes, e.g. determination of an index representative of the image change
• CPC Class Codes: H05K 1/0213 : Electrical arrangements not otherwise provided for

Abstract

This present invention pertains to: a conductive laminate body, a touch panel, and a display device. In the present invention, the relative refractive index of a substrate with respect to a first protective sheet, and/or the relative refractive index of the substrate with respect to a second protective sheet is 0.86-1.15. The relative refractive index of a first substrate with respect to the first protective sheet, and/or the relative refractive index of a second substrate with respect to the second protective sheet is 0.86-1.15.

Claims

1. A conductive laminate body comprising:

a substrate;

a first conductive portion made up from a plurality of thin metal wires and which is formed on one main surface of the substrate;

a first protective layer disposed on the one main surface in covering relation to the first conductive portion;

a second conductive portion made up from a plurality of thin metal wires and which is formed on another main surface of the substrate; and

a second protective layer disposed on the other main surface in covering relation to the second conductive portion,

wherein, by combining the first conductive portion and the second conductive portion, a mesh pattern is formed in which same mesh shapes are arranged regularly as viewed in plan, and

at least one of a relative index of refraction of the substrate with respect to the first protective layer and a relative index of refraction of the substrate with respect to the second protective layer is 0.86 to 1.15,

wherein a rate of change in luminance is 16.5% or more which is represented by 100×

(Lb−

La)/La where La denotes luminance in a region that does not form the first protective layer, and Lb denotes luminance in a region that forms the first protective layer, the luminance measured with white light irradiating the conductive laminate body.

2. The conductive laminate body according to claim 1, wherein at least one of the relative index of refraction of the substrate with respect to the first protective layer and the relative index of refraction of the substrate with respect to the second protective layer is 0.91 to 1.08.

3. The conductive laminate body according to claim 2, wherein at least one of the relative index of refraction of the substrate with respect to the first protective layer and the relative index of refraction of the substrate with respect to the second protective layer is substantially equal to 1.

4. The conductive laminate body according to claim 3, wherein at least one of the first protective layer and the second protective layer is made of a same material as the substrate.

5. The conductive laminate body according to claim 1, wherein:

the substrate is made of polyethylene terephthalate; and

at least one of the first protective layer and the second protective layer is made of any of polychlorotrifluoroethylene, polymethylmethacrylate, polystyrene, polyethylene terephthalate, polythiourethane, and high refractive index glass.

6. The conductive laminate body according to claim 1, wherein:

the first conductive portion includes at least two first conductive patterns that extend in a first direction, and are arranged in a second direction perpendicular to the first direction;

the second conductive portion includes at least two second conductive patterns that extend in the second direction, and are arranged in the first direction; and

each of the first conductive patterns and the second conductive patterns comprises a combination of at least two lattices.

7. The conductive laminate body according to claim 6, wherein:

the first conductive pattern is constituted by connecting at least two first sensing units in series in the first direction;

each of the first sensing units comprises a combination of at least two of the lattices;

the second conductive pattern is constituted by connecting at least two second sensing units in series in the second direction; and

each of the second sensing units comprises a combination of at least two of the lattices.

8. The conductive laminate body according to claim 6, wherein:

each of the lattices is diamond-shaped; and

vertex angles of each of the lattices are greater than or equal to 60° and

less than 90°

, or greater than 90° and

less than or equal to 120°

.

9. A touch panel comprising:

the conductive laminate body according to claim 1; and

a detection control unit for detecting a contact position or a proximity position from a side of a main surface of the conductive laminate body.

10. A display device comprising:

the conductive laminate body according to claim 1;

a detection control unit for detecting a contact position or a proximity position from a side of a main surface of the conductive laminate body; and

a display unit that displays an image on a display surface based on a display signal,

wherein the conductive laminate body is disposed on the display surface.

11. The conductive laminate body according to claim 1, wherein

the first conductive portion made up from a plurality of thin metal wires is disposed directly on one main surface of the substrate, and

the second conductive portion made up from a plurality of thin metal wires is disposed directly on the another main surface of the substrate.

12. The conductive laminate body according to claim 1, further comprising:

a first adhesive layer provided between the one main surface of the substrate and the first protective layer; and

a second adhesive layer provided between the another main surface of the substrate and the second protective layer.

13. A conductive laminate body comprising:

a first substrate;

a first conductive portion made up from a plurality of thin metal wires and which is formed on one main surface of the first substrate;

a first protective layer disposed on the one main surface of the first substrate in covering relation to the first conductive portion;

a second substrate;

a second conductive portion made up from a plurality of thin metal wires and which is formed on one main surface of the second substrate; and

a second protective layer disposed on the one main surface of the second substrate in covering relation to the second conductive portion,

wherein, by combining the first conductive portion and the second conductive portion, a mesh pattern is formed in which same mesh shapes are arranged regularly as viewed in plan, and

at least one of a relative index of refraction of the first substrate with respect to the first protective layer and a relative index of refraction of the second substrate with respect to the second protective layer is 0.86 to 1.15,

wherein a rate of change in luminance is 16.5% or more which is represented by 100×

(Lb−

La)/La where La denotes luminance in a region that does not form the first protective layer, and Lb denotes luminance in a region that forms the first protective layer, the luminance measured with white light irradiating the conductive laminate body.

14. The conductive laminate body according to claim 13, wherein at least one of the relative index of refraction of the first substrate with respect to the first protective layer and the relative index of refraction of the second substrate with respect to the second protective layer is 0.91 to 1.08.

15. The conductive laminate body according to claim 14, wherein at least one of the relative index of refraction of the first substrate with respect to the first protective layer and the relative index of refraction of the second substrate with respect to the second protective layer is substantially equal to 1.

16. The conductive laminate body according to claim 15, wherein the first protective layer is made of a same material as the first substrate, and/or the second protective layer is made of a same material as the second substrate.

17. The conductive laminate body according to claim 13, wherein:

the first substrate is made of polyethylene terephthalate, and the first protective layer is made of any of polychlorotrifluoroethylene, polymethylmethacrylate, polystyrene, polyethylene terephthalate, polythiourethane, and high refractive index glass; and

/or

the second substrate is made of polyethylene terephthalate, and the second protective layer is made of any of polychlorotrifluoroethylene, polymethylmethacrylate, polystyrene, polyethylene terephthalate, polythiourethane, and high refractive index glass.

18. The conductive laminate body according to claim 13, wherein:

the first conductive portion includes at least two first conductive patterns that extend in a first direction, and are arranged in a second direction perpendicular to the first direction;

the second conductive portion includes at least two second conductive patterns that extend in the second direction, and are arranged in the first direction; and

each of the first conductive patterns and the second conductive patterns comprises a combination of at least two lattices.

19. The conductive laminate body according to claim 18, wherein:

the first conductive pattern is constituted by connecting at least two first sensing units in series in the first direction;

each of the first sensing units comprises a combination of at least two of the lattices;

the second conductive pattern is constituted by connecting at least two second sensing units in series in the second direction; and

each of the second sensing units comprises a combination of at least two of the lattices.

20. The conductive laminate body according to claim 18, wherein:

each of the lattices is diamond-shaped; and

vertex angles of each of the lattices are greater than or equal to 60° and

less than 90°

or greater than 90° and

less than or equal to 120°

.

21. A touch panel comprising:

the conductive laminate body according to claim 13; and

a detection control unit for detecting a contact position or a proximity position from a side of a main surface of the conductive laminate body.

22. A display device comprising:

the conductive laminate body according to claim 13;

a detection control unit for detecting a contact position or a proximity position from a side of a main surface of the conductive laminate body; and

a display unit that displays an image on a display surface based on a display signal,

wherein the conductive laminate body is disposed on the display surface.

23. The conductive laminate body according to claim 13, wherein

the first conductive portion made up from a plurality of thin metal wires is disposed directly on the one main surface of the first substrate, and

the second conductive portion made up from a plurality of thin metal wires is disposed directly on the one main surface of the second substrate.

24. The conductive laminate body according to claim 13, further comprising:

a first adhesive layer provided between the one main surface of the first substrate and the first protective layer; and

a second adhesive layer provided between the one main surface of the second substrate and the second protective layer.