Tactile supply device

1. A tactile sensation supply device comprising:

a plurality of tactile sensation providers made of magnetic particles and a matrix material; and

a magnetic field generator for generating a magnetic field to transform the plurality of tactile sensation providers,

wherein the plurality of tactile sensation providers maintains a first shape when not influenced by a magnetic field,

wherein the plurality of tactile sensation providers maintains a second shape when influenced by a magnetic field,

wherein the plurality of tactile sensation providers returns from the second shape to the first shape and produces a reciprocating motion by elastic force, thereby transferring a tactile sensation, and

wherein the plurality of tactile sensation providers is in the shape of at least one of a fine projection, an empty cylinder, a dome, a polyhedron, a plate, a leaf spring, a seesaw and a tunnel.

2. The tactile sensation supply device of claim 1 , wherein the plurality of tactile sensation providers is made of a magnetorheological elastomer (MRE).

3. The tactile sensation supply device of claim 1 , wherein the magnetic field generator is at least one of a planar coil and a solenoid coil.

4. The tactile sensation supply device of claim 1 , further comprising a supporter disposed between the plurality of tactile sensation providers and the magnetic field generator to ensure a space for the transformation of the plurality of tactile sensation providers.

5. The tactile sensation supply device of claim 4 , wherein the supporter is made of an MRE and has at least one of a curved shape and a wave shape.

6. The tactile sensation supply device of claim 1 , further comprising a tactile unit that contacts a user, wherein at least one of the plurality of tactile sensation providers is connected to the tactile unit.

7. The tactile sensation supply device of claim 6 , wherein the tactile unit includes at least one cell, and wherein the magnetic field generator is disposed under the tactile unit.

8. The tactile sensation supply device of claim 7 , wherein the magnetic field generator includes at least one coil unit that corresponds to the cell.

9. The tactile sensation supply device of claim 8 , wherein the coil unit is disposed as multiple layers that overlap each other.

10. The tactile sensation supply device of claim 9 , wherein the tactile sensation includes at least one of vibration, brushing, constriction, beating, pressing, tapping and tilting.

11. The tactile sensation supply device of claim 6 , wherein the tactile unit further includes a cell barrier having a height lower than a height of the plurality of tactile sensation providers and provided along the perimeter of the cell.

12. The tactile sensation supply device of claim 1 , wherein the magnetic field generator is at a location and in a shape corresponding to the plurality of the tactile sensation providers,

wherein the plurality of tactile sensation providers is transformed in response to a magnetic field generated by the magnetic field generator, and

wherein a tactile sensation is transferred by the transformation of the plurality of tactile sensation providers.

13. The tactile sensation supply device of claim 1 , wherein at least one of the degree, direction, and frequency of the transformation from the first shape to the second shape is controlled by controlling at least one of the intensity, direction, and frequency of the magnetic field generated by the magnetic field generator.

14. The tactile sensation supply device of claim 1 , wherein the magnetic particles includes at least one of iron (Fe), cobalt (Co) and nickel (Ni).

15. The tactile sensation supply device of claim 1 , wherein the matrix material is made of rubber or a polymer.