Detection device capable of accurately reading dots on dice

1. A detection device, which is used in a gaming machine that detects a number of dots on a die, that reads the number of dots on the die, the device comprising:

a wireless tag that is disposed in the die; and

a reader that reads number of dots information from the wireless tag, wherein the reader includes a plurality of antenna portions that is disposed on a field on which the die rolls, and forms a plurality of detection areas, and

wherein the detection area formed by one antenna portion of the plurality of antenna portions is partially mutually superimposed with the detection area formed by other antenna portion of the plurality of antenna portions.

2. The device of claim 1 , wherein the plurality of antenna portions include a first antenna portion and a plurality second antenna portions, and

wherein the first antenna portion is disposed substantially in a central portion of the field and is formed in a substantially circular shape, and

the second antenna portion has a plurality of areas that surround the first antenna portion and are partially superimposed with the detection area by the first antenna portion.

3. The device of claim 2 , wherein the plurality of antenna portions further include a third antenna portion,

wherein the third antenna portion has a plurality of areas that surround the first antenna portion and are partially superimposed with the detection area by the first antenna portion, and

wherein each area of the third antenna portion is located between adjacent two areas of the second antenna portions and is partially superimposed with the adjacent two areas.

4. The device of claim 2 , wherein each area of the second antenna portion is formed in a substantially triangular shape.

5. The device of claim 1 , wherein each of the plurality of the antenna portions is formed in a substantially circular sector whose center is roundly chamfered and whose central angle is no greater than 180 degrees.

6. The device of claim 5 , wherein an area corresponding to a vicinity of a radius of each of the plurality of the antenna portions is partially superimposed with an area corresponding to a vicinity of a radius of an adjacent antenna portion.

7. The device of claim 1 , wherein each of the plurality of the antenna portions includes a plurality of first antenna lines disposed in parallel along a first direction and a plurality of second antenna lines disposed in parallel along a second direction that perpendicularly intersects the first direction.

8. The device of claim 7 , wherein each of the plurality of the antenna portions is superimposed with other one of the plurality of the antenna portions in a state of being moved to a predetermined direction.

9. A detection device, which is used in a gaming machine that detects a number of dots on a die having a wireless tag, and reads the number of dots on the die, the device comprising:

a field that supports the die; and

a reader that reads a number of dots information of the die from the wireless tag,

wherein the reader includes:

a reader main body portion that decodes the number of dots information from the wireless tag and controls the reader, and

a plurality of antenna portions that are connected to the reader main body portion,

wherein a detection area is formed on the field by each of the plurality of the antenna portions, and

wherein the detection area formed by one antenna portion of the plurality of the antenna portions is partially mutually superimposed with the detection area formed by other antenna portion of the plurality of the antenna portions.

10. The device of claim 9 , wherein the plurality of antenna portions include a first antenna portion and a plurality second antenna portions, and

wherein the first antenna portion is disposed substantially in a central portion of the field and is formed in a substantially circular shape, and

the second antenna portion has a plurality of areas that surround the first antenna portion and are partially superimposed with the detection area by the first antenna portion.

11. The device of claim 10 , wherein the plurality of antenna portions further include a third antenna portion,

wherein the third antenna portion has a plurality of areas that surround the first antenna portion and are partially superimposed with the detection area by the first antenna portion, and

wherein each area of the third antenna portion is located between adjacent two areas of the second antenna portions and is partially superimposed with the adjacent two areas.

12. The device of claim 10 , wherein each area of the second antenna portion is formed in a substantially triangular shape.

13. The device of claim 9 , wherein each of the plurality of the antenna portions is formed in a substantially circular sector whose center is roundly chamfered and whose central angle is no greater than 180 degrees.

14. The device of claim 13 , wherein an area corresponding to a vicinity of a radius of each of the plurality of the antenna portions is partially superimposed with an area corresponding to a vicinity of a radius of an adjacent antenna portion.

15. The device of claim 9 , wherein each of the plurality of the antenna portions includes a plurality of first antenna lines disposed in parallel along a first direction and a plurality of second antenna lines disposed in parallel along a second direction that perpendicularly intersects the first direction.

16. The device of claim 15 , wherein each of the plurality of the antenna portions is superimposed with other one of the plurality of the antenna portions in a state of being moved to a predetermined direction.