TRANSPARENT CONDUCTIVE SUBSTRATE AND METHOD FOR MANUFACTURING SAME

• US 20140198269A1
• Filed: 09/27/2012
• Published: 07/17/2014
• Est. Priority Date: 09/27/2011
• Status: Active Grant

• Current Assignee: LG Chem Limited (LG Corporation), LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Chem Limited (LG Corporation)
• Inventors: Hwang, Ji Young, Choi, Hyeon, Lee, Seung Heon, Kim, Sujin, Kim, Ki-Hwan
• Granted Patent: US 9,686,859 B2
• Time in Patent Office: Days
• US Class Current: 349/12
• CPC Class Codes: G02B 5/1866 Transmission gratings characterised by their structure, e.g. step profile, contours of substrate or grooves, pitch variations, materials G02B5/1809, G02B5/1828, G02B5/1833, G02B5/1838 and G02B5/1847 take precedence
• 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 3/0412 Digitisers structurally integrated in a display
• 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 3/0448 Details of the electrode shape, e.g. for enhancing the detection of touches, for generating specific electric field shapes, for enhancing display quality
• CPC Class Codes: H05K 1/11 Printed elements for providing electric connections to or between printed circuits
• CPC Class Codes: H05K 3/10 in which conductive material is applied to the insulating support in such a manner as to form the desired conductive pattern
• CPC Class Codes: H05K 9/0096 for television displays, e.g. plasma display panel
• CPC Class Codes: Y10T 29/49155 Manufacturing circuit on or in base

Abstract

The present invention provides a transparent conductive substrate comprising: a transparent substrate, and a conductive pattern provided on the transparent substrate, wherein the conductive pattern comprises line breakage portions performing electric breakage, and a pattern of a broken line formed when the line breakage portions are connected comprises an irregular pattern shape. The present invention can minimize a moiré phenomenon and a diffraction phenomenon by external light by performing line breakage of a regular or irregular conductive pattern by using the irregular pattern.

Claims

1. A transparent conductive substrate comprising:

a transparent substrate, and

a conductive pattern provided on the transparent substrate,

wherein the conductive pattern comprises line breakage portions performing electric breakage, and a pattern of a broken line formed when the line breakage portions are connected comprises an irregular pattern shape.

2. The transparent conductive substrate of claim 1, wherein the conductive pattern comprises a pattern formed of a conductive metal line.

3. The transparent conductive substrate of claim 2, wherein the line breakage portions electrically break the conductive metal line, and an interval between the electrically broken conductive metal lines is 50 μ

m or less.

4. The transparent conductive substrate of claim 3, wherein the interval between the electrically broken conductive metal lines is 0.5 to 15 μ

m.

5. The transparent conductive substrate of claim 2, wherein the pattern formed of the conductive metal line comprises a straight line, a curved line, or a closed curve formed of the straight line and the curved line.

6. The transparent conductive substrate of claim 1, wherein the conductive pattern is a regular or irregular pattern.

7. The transparent conductive substrate of claim 1, wherein the conductive pattern comprises a mesh pattern.

8. The transparent conductive substrate of claim 7, wherein the mesh pattern comprises a regular polygonal pattern comprising one or more shapes of a triangle, a quadrangle, a pentagon, a hexagon, and an octagon.

9. The transparent conductive substrate of claim 1, wherein the conductive pattern comprises an edge structure of continuously connected closed figures, the closed figures having the same shape are not present in a predetermined unit area (1 cm×

1 cm) in the conductive pattern, and the number of vertexes of the closed figures is different from the number of vertexes of quadrangles having the same number as the closed figures.

10. The transparent conductive substrate of claim 1, wherein the conductive pattern comprises the edge structure of continuously connected closed figures, the closed figures having the same shape are not present in the predetermined unit area (1 cm×

1 cm) in the conductive pattern, and the number of vertexes of the closed figures is different from the number of vertexes of a polygon formed by connecting shortest distances between centers of gravity of the closed figures.

11. The transparent conductive substrate of claim 1, wherein the conductive pattern comprises the edge structure of continuously connected closed figures, the closed figures having the same shape are not present in the predetermined unit area (1 cm×

1 cm) in the conductive pattern, and a value of the following Equation 1 is 50 or more in the closed figures;

(Standard deviation of distances between vertexes/Average of distances between vertexes)×

100  

 

[Equation 1]

12. The transparent conductive substrate of claim 1, wherein the pattern of the broken lines formed when the line breakage portions are connected further comprise a regular pattern shape.

13. The transparent conductive substrate of claim 12, wherein the regular pattern shape is less than 20% of the entire pattern shape of the broken line.

14. The transparent conductive substrate of claim 1, wherein the pattern of the broken line formed when the line breakage portions are connected comprises the edge structure of continuously connected closed figures, the closed figures having the same shape are not present in the predetermined unit area (1 cm×

1 cm) in the pattern of the broken line, and the number of vertexes of the closed figures is different from the number of vertexes of quadrangles having the same number as the closed figures.

15. The transparent conductive substrate of claim 1, wherein the pattern of the broken line formed when the line breakage portions are connected comprises the edge structure of continuously connected closed figures, the closed figures having the same shape are not present in the predetermined unit area (1 cm×

1 cm) in the pattern of the broken line, and the number of vertexes of the closed figures is different from the number of vertexes of a polygon formed by connecting shortest distances between centers of gravity of the closed figures.

16. The transparent conductive substrate of claim 1, wherein the pattern of the broken line formed when the line breakage portions are connected comprises the edge structure of continuously connected closed figures, the closed figures having the same shape are not present in the predetermined unit area (1 cm×

1 cm) in the pattern of the broken line, and a value of the following Equation 1 is 50 or more in the closed figures;

(Standard deviation of distances between vertexes/Average of distances between vertexes)×

100  

 

[Equation 1]

18. A capacitive type touch screen apparatus comprising:

the transparent conductive substrate according to claim 1.

17. A method of manufacturing a transparent conductive substrate, comprising:

forming a conductive pattern on a transparent substrate,

wherein the conductive pattern comprises line breakage portions performing electric breakage, and a pattern of a broken line formed when the line breakage portions are connected is formed to comprise an irregular pattern shape.