Conductive sheet and touch panel

Abstract

Provided are a conductive sheet and a touch panel having a high detection accuracy of touching with a finger. A conductive sheet includes: a first electrode pattern including first conductive patterns; and a second electrode pattern including second conductive patterns. The first conductive patterns and the second conductive patterns are placed so as to be orthogonal to each other. Each first conductive pattern includes slit-like sub-nonconduction patterns inside thereof.

What is claimed is: 
     
       1. A conductive sheet comprising:
 a first electrode pattern; and 
 a second electrode pattern opposite to the first electrode pattern, wherein 
 the first electrode pattern is formed by a plurality of grids made of a plurality of metal thin wires that intersect with each other, 
 the first electrode pattern alternately includes: a plurality of first conductive patterns that extend in a first direction; and a plurality of first nonconductive patterns that are electrically separated from the plurality of first conductive patterns, 
 the second electrode pattern is formed by a plurality of grids made of a plurality of metal thin wires that intersect with each other, 
 the second electrode pattern alternately includes: a plurality of second conductive patterns that extend in a second direction orthogonal to the first direction; and a plurality of second nonconductive patterns that are electrically separated from the plurality of second conductive patterns, 
 the first electrode pattern and the second electrode pattern are placed such that the plurality of first conductive patterns and the plurality of second conductive patterns are orthogonal to each other in top view and that the grids of the first electrode pattern and the grids of the second electrode pattern form small grids in top view, 
 each of the first conductive patterns includes, at least inside thereof, slit-like sub-nonconduction patterns that are electrically separated from the first conductive pattern and extend in the first direction, 
 each of the first conductive patterns includes a plurality of first conductive pattern lines divided by the sub-nonconduction patterns, and 
 each of the second conductive patterns has a strip shape. 
 
     
     
       2. A conductive sheet comprising:
 a first electrode pattern; and 
 a second electrode pattern placed opposite to the first electrode pattern, wherein 
 the first electrode pattern is formed by a plurality of grids made of a plurality of metal thin wires that intersect with each other, 
 the first electrode pattern alternately includes: a plurality of first conductive patterns that extend in a first direction; and a plurality of first nonconductive patterns that are electrically separated from the plurality of first conductive patterns, 
 the second electrode pattern is formed by a plurality of grids made of a plurality of metal thin wires that intersect with each other, 
 the second electrode pattern alternately includes: a plurality of second conductive patterns that extend in a second direction orthogonal to the first direction; and a plurality of second nonconductive patterns that are electrically separated from the plurality of second conductive patterns, 
 the first electrode pattern and the second electrode pattern are placed such that the plurality of first conductive patterns and the plurality of second conductive patterns are orthogonal to each other in top view and that the grids of the first electrode pattern and the grids of the second electrode pattern form small grids in top view, 
 each of the first conductive patterns includes sub-nonconduction patterns that are spaced apart from each other along the first direction, to thereby have X-shaped structures with cyclic intersections, and 
 each of the second conductive patterns has a strip shape. 
 
     
     
       3. The conductive sheet according to  claim 1 , wherein the plurality of grids have uniform shapes. 
     
     
       4. The conductive sheet according to  claim 1 , wherein
 the first nonconductive patterns and the second nonconductive patterns respectively include first break parts and second break parts in portions other than intersection parts of the metal thin wires, 
 the first break parts and the second break parts are respectively located near centers between the intersection parts and the intersection parts, and 
 each of the first break parts and the second break parts has a width that exceeds a wire width of each of the metal thin wires and is equal to or less than 50 μm. 
 
     
     
       5. The conductive sheet according to  claim 1 , wherein
 the metal thin wires of the second conductive patterns are located in the first break parts of the first nonconductive patterns in top view, and 
 the metal thin wires of the first conductive patterns are located in the second break parts of the second nonconductive patterns in top view. 
 
     
     
       6. The conductive sheet according to  claim 1 , wherein
 each of the grids of the first electrode pattern and the grids of the second electrode pattern has one side having a length of 250 μm to 900 μm, and 
 each of the small grids has one side having a length of 125 μm to 450 μm. 
 
     
     
       7. The conductive sheet according to  claim 1 , wherein each of the metal thin wires that form the first electrode pattern and the metal thin wires that form the second electrode pattern has a wire width equal to or less than 30 μm. 
     
     
       8. The conductive sheet according to  claim 1 , wherein each of the grids of the first electrode pattern and the grids of the second electrode pattern has a rhomboid shape. 
     
     
       9. A conductive sheet comprising:
 a substrate having a first main surface; and 
 a first electrode pattern placed on the first main surface, wherein 
 the first electrode pattern is formed by a plurality of grids made of a plurality of metal thin wires that intersect with each other, 
 the first electrode pattern includes a plurality of first conductive patterns that extend in a first direction, 
 each of the first conductive patterns includes, at least inside thereof, slit-like sub-nonconduction patterns that are electrically separated from the first conductive pattern and extend in the first direction, and 
 each of the first conductive patterns includes a plurality of first conductive pattern lines divided by the sub-nonconduction patterns. 
 
     
     
       10. A conductive sheet comprising:
 a substrate having a first main surface; and 
 a first electrode pattern placed on the first main surface, wherein 
 the first electrode pattern is formed by a plurality of grids made of a plurality of metal thin wires that intersect with each other, and 
 the first electrode pattern includes: a plurality of first conductive patterns that extend in a first direction; and a plurality of sub-nonconduction patterns that are spaced apart from each other along the first direction, to thereby have X-shaped structures with cyclic intersections. 
 
     
     
       11. The conductive sheet according to  claim 1 , wherein a width of each of the first conductive pattern lines and a width of each of the sub-nonconduction patterns are substantially equal to each other. 
     
     
       12. The conductive sheet according to  claim 1 , wherein a width of each of the first conductive pattern lines is smaller than a width of each of the sub-nonconduction patterns. 
     
     
       13. The conductive sheet according to  claim 1 , wherein a width of each of the first conductive pattern lines is larger than a width of each of the sub-nonconduction patterns. 
     
     
       14. The conductive sheet according to  claim 11 , wherein the first electrode pattern includes a joining part that electrically connects the plurality of first conductive pattern lines to each other. 
     
     
       15. The conductive sheet according to  claim 1 , wherein a number of the first conductive pattern lines is equal to or less than ten. 
     
     
       16. The conductive sheet according to  claim 2 , wherein
 each of the sub-nonconduction patterns is surrounded by a plurality of sides, and 
 each of the sides is formed by linearly arranging the plurality of grids with sides of the grids being connected to each other. 
 
     
     
       17. The conductive sheet according to  claim 2 , wherein
 each of the sub-nonconduction patterns is surrounded by a plurality of sides, and 
 each of the sides is formed by linearly arranging, in multiple stages, the plurality of grids with sides of the grids being connected to each other. 
 
     
     
       18. The conductive sheet according to  claim 2 , wherein
 each of the sub-nonconduction patterns is surrounded by a plurality of sides, 
 some of the sides are formed by linearly arranging the plurality of grids with sides of the grids being connected to each other, and 
 the other sides are formed by linearly arranging the plurality of grids with apex angles of the grids being connected to each other. 
 
     
     
       19. The conductive sheet according to  claim 16 , wherein the plurality of sub-nonconduction patterns defined by the sides formed by the plurality of grids are arranged along the first direction with apex angles of the grids being connected to each other. 
     
     
       20. The conductive sheet according to  claim 16 , wherein adjacent ones of the sub-nonconduction patterns along the first direction have shapes different from each other. 
     
     
       21. The conductive sheet according to  claim 19 , wherein each of the plurality of grids that form the sides for defining the sub-nonconduction patterns further includes a protruding wire made of a metal thin wire. 
     
     
       22. The conductive sheet according to  claim 19 , wherein each of the first conductive patterns includes the sub-nonconduction patterns that are spaced apart from each other, to thereby have X-shaped structures in which the grids are not present at cyclical intersection parts. 
     
     
       23. The conductive sheet according to  claim 19 , wherein
 adjacent ones of the sub-nonconduction patterns along the first direction have the same shape as each other in each of the first conductive patterns, and 
 the sub-nonconduction patterns have shapes different between adjacent ones of the first conductive patterns. 
 
     
     
       24. A touch panel comprising the conductive sheet according to  claim 1 .