TOUCHSCREEN AND METHOD FOR MANUFACTURING SAME

• US 20150324024A1
• Filed: 12/02/2013
• Published: 11/12/2015
• Est. Priority Date: 11/30/2012
• Status: Active Grant

• Current Assignee: LG Chem Limited (LG Corporation)
• Original Assignee: LG Chem Limited (LG Corporation)
• Inventors: HWANG, Ji Young, LEE, Seung Heon, HWANG, In-Seok
• Granted Patent: US 10,019,084 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G06F 1/16 Constructional details or arrangements
• CPC Class Codes: G06F 2203/04102 Flexible digitiser, i.e. constructional details for allowing the whole digitising part of a device to be flexed or rolled like a sheet of paper
• 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 3/04164 Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads

Abstract

The present application relates to a touch screen and a method for preparing the same, and the touch screen according to the present application comprises a screen part and a non-screen part, in which the non-screen part comprises a router part, a flexible printed circuit board (FPCB) part, a first pad part connecting the screen part and the router part, a second pad part connecting the router part and the flexible printed circuit board part, and a decoration part, the screen part comprises a first conductive pattern, the router part, the first pad part, and the second pad part each comprise a second conductive pattern, and the decoration part comprises a third conductive pattern, and a darkened pattern or a color pattern provided on at least one surface of the third conductive pattern and provided in a region corresponding to the third conductive pattern.

Claims

1. A touch screen comprising:

a screen part; and

a non-screen part,

wherein the non-screen part comprises a router part, a flexible printed circuit board (FPCB) part, a first pad part connecting the screen part and the router part, a second pad part connecting the router part and the flexible printed circuit board part, and a decoration part,

the screen part comprises a first conductive pattern,

the router part, the first pad part, and the second pad part each comprise a second conductive pattern, and

the decoration part comprises a third conductive pattern, and a darkened pattern or a color pattern provided on at least one surface of the third conductive pattern and provided on a region corresponding to the third conductive pattern.

2. The touch screen of claim 1, wherein the router part, the first pad part, the second pad part, and the decoration part each independently additionally comprise a dummy pattern.

3. The touch screen of claim 1, wherein the first conductive pattern, the second conductive pattern, and the third conductive pattern have the same line height.

4. The touch screen of claim 1, wherein at least a part of the first conductive pattern and the second conductive pattern comprise regions connected with each other, and

the region connected with each other has no coupling part.

5. The touch screen of claim 4, wherein a line resistance value on the shortest distance from any one side connected with the second conductive pattern to the other side facing the one side in any one region electrically connected in the first conductive pattern is larger than or equal to a line resistance value from any one side connected with the first conductive pattern to the other side in which the second conductive pattern is in contact with a flexible printed circuit board part in any one region electrically connected in the second conductive pattern.

6. The touch screen of claim 4, wherein in any one region connected in the first conductive pattern, a flow direction of electricity of the first conductive pattern from any one side of the screen part to the other side facing the one side and a conductive line of the first conductive pattern have different angles.

7. The touch screen of claim 1, wherein the first conductive pattern and the third conductive pattern are not electrically connected with each other, and

the second conductive pattern and the third conductive pattern are not electrically connected with each other.

8. The touch screen of claim 2, wherein the second conductive pattern, the third conductive pattern and the dummy pattern are not electrically connected with each other.

9. The touch screen of claim 1, wherein the first conductive pattern, the second conductive pattern, and the third conductive pattern are simultaneously formed by a one-time printing process.

10. The touch screen of claim 9, wherein the printing process is a reverse offset printing process.

11. The touch screen of claim 1, wherein the first conductive pattern, the second conductive pattern, and the third conductive pattern are provided on a substrate, and

the first conductive pattern, the second conductive pattern, and the third conductive pattern are all provided on the same surface of the substrate.

12. The touch screen of claim 11, further comprising:

a high-hardness hard coating layer provided on at least one surface of the substrate.

13. The touch screen of claim 12, wherein a high-hardness hard coating layer is provided on any one surface of the substrate, and the first conductive pattern, the second conductive pattern, and the third conductive pattern are provided on the other surface of the substrate.

14. The touch screen of claim 12, wherein the first conductive pattern, the second conductive pattern, and the third conductive pattern are provided on the high-hardness coating layer.

15. The touch screen of claim 1, wherein the first conductive pattern, the second conductive pattern, and the third conductive pattern comprise a fine short-circuit part.

16. The touch screen of claim 15, wherein a width of the fine short-circuit part of the first conductive pattern is 15 μ

m or less.

17. The touch screen of claim 1, wherein in any region of 1 mm×

1 mm of the first conductive pattern,

the touch screen comprises at least one of regions different in aperture ratios of the first conductive pattern, and

the difference in aperture ratios is 0.1 to 5%.

18. The touch screen of claim 1, wherein the aperture ratio of the second conductive pattern and the third conductive pattern is more than 0.

19. The touch screen of claim 1, wherein the second pad part further comprises an FPCB connection region, and

the aperture ratio of the FPCB connection region is 0.

20. The touch screen of claim 1, further comprising:

a conductive layer provided between the second pad part and the flexible printed circuit board part.

21. The touch screen of claim 1, wherein the screen part further comprises a wiring region, and

a line width of the first conductive pattern and a width of the wiring region satisfy the relationship of the following Equation 3:

0.85≦

(D²−

X)²/D≦

0.995 

 

[Equation 3]

in Equation 3,

X is a line width (μ

m) of a first conductive pattern, and D is a width (μ

m) of a wiring region.

22. The touch screen of claim 21, wherein the line width of the first conductive pattern and the width of the wiring region satisfy the relationship of the following Equation 4:

0.9≦

(D²−

X)²/D≦

0.99 

 

[Equation 4]

in Equation 4,

X is a line width (μ

m) of a first conductive pattern, and D is a width (μ

m) of a wiring region.

23. The touch screen of claim 1, wherein the first conductive pattern, the second conductive pattern, the dummy pattern and the third conductive pattern each independently comprise a pattern formed of a conductive metal line.

24. The touch panel of claim 23, wherein the pattern formed of the conductive metal line comprises a closed curve formed of a straight line, a curved line, or the straight line or the curved line.

25. The touch screen of claim 23, wherein the conductive metal line comprises one or more selected from the group consisting of the group consisting of metals, metal oxides, metal nitrides, metal oxynitrides, and metal alloys.

26. The touch screen of claim 1, wherein the first conductive pattern, the second conductive pattern, and the third conductive pattern each independently comprise a regular pattern or an irregular pattern.

27. The touch screen of claim 1, wherein at least a part of the second conductive pattern is different from the first conductive pattern in line width.

28. The touch screen of claim 27, wherein a difference in the line widths between at least a part of the second conductive pattern and the first conductive pattern is 5 to 100 μ

m.

29. The touch screen of claim 1, wherein at least a part of the third conductive pattern is different from the first conductive pattern in line width.

30. The touch screen of claim 29, wherein a difference in line widths between at least a part of the third conductive pattern and the first conductive pattern is 5 to 100 μ

m.

31. The touch screen of claim 1, further comprising:

a darkened pattern provided on at least one surface of the first conductive pattern and provided in a region corresponding to the first conductive pattern.

32. The touch screen of claim 1, further comprising:

a darkened pattern provided on at least one surface of the second conductive pattern and provided in a region corresponding to the second conductive pattern.

33. The touch screen of claim 1, wherein a reflectance of the non-screen part is 50% or less.

34. The touch screen of claim 1, wherein the darkened pattern or the color pattern is provided on a surface observed by a user in the third conductive pattern.

35. The touch screen of claim 1, further comprising:

a window touched by a user,

wherein the darkened pattern or the color pattern is directly formed on a surface opposite to the surface of the window which is touched by the user.

36. The touch screen of claim 1, further comprising:

a window touched by a user,

wherein the darkened pattern or the color pattern is in contact with a surface opposite to the surface of the window which is touched by the user.

37. A display device comprising the touch screen of claim 1.