Tactile sense presentation apparatus, signal generation device, tactile sense presentation system, and tactile sense presentation method

1. A tactile sense presentation apparatus, comprising:

a movable body;

an actuator unit connected to the movable body, the actuator unit comprising a first actuator; and

a signal generation unit configured to supply a driving signal to the first actuator such that the driving signal generates a vibration on the movable body, the vibration having, within a single vibration period of the movable body, a first amplitude and/or frequency during a first portion of the single vibration period in which the movable body is moved in a first direction and a second amplitude and/or frequency, different from the first amplitude and/or frequency, during a second portion of the single vibration period in which the movable body is moved in a second direction opposite to the first direction.

2. The tactile sense presentation apparatus according to claim 1 , wherein

the signal generation unit is configured to generate the driving signal such that the actuator unit moves the movable body along a first direction under a first frequency and along a second direction opposite to the first direction under a second frequency different from the first frequency.

3. The tactile sense presentation apparatus according to claim 1 , wherein

the signal generation unit is configured to generate the driving signal such that the actuator unit moves the movable body along a first direction by a first amplitude and along a second direction opposite to the first direction under a second amplitude different from the first amplitude.

4. The tactile sense presentation apparatus according to claim 1 , wherein

the signal generation unit is configured to generate the driving signal such that a vibration having an amplitude and a frequency obtained on the basis of a detection threshold value of a tactile receptor is generated on the actuator unit.

5. The tactile sense presentation apparatus according to claim 4 , wherein

the signal generation unit is configured to generate the driving signal such that vibrations including a vibration having a frequency corresponding to a tactile area of the tactile receptor and a vibration having a frequency corresponding to a non-tactile area of the tactile receptor are generated on the actuator unit.

6. The tactile sense presentation apparatus according to claim 4 , wherein

the signal generation unit is configured to generate the driving signal such that vibrations including a vibration having an amplitude corresponding to the tactile area of the tactile receptor and a vibration having an amplitude corresponding to the non-tactile area of the tactile receptor are generated on the actuator unit.

7. The tactile sense presentation apparatus according to claim 1 , wherein

the first actuator moves the movable body along a direction of a first axis.

8. The tactile sense presentation apparatus according to claim 7 , wherein

the actuator unit further includes a second actuator that moves the movable body along a direction of a second axis different from the first axis, and

the signal generation unit is configured to further supply the driving signal to the second actuator.

9. The tactile sense presentation apparatus according to claim 8 , wherein

the signal generation unit is configured to synchronize timing of a peak value of the driving signal supplied to the first actuator with timing of a peak value of the driving signal supplied to the second actuator.

10. The tactile sense presentation apparatus according to claim 8 , wherein

the signal generation unit is configured to displace timing of a peak value of the driving signal supplied to the first actuator from timing of a peak value of the driving signal supplied to the second actuator.

11. The tactile sense presentation apparatus according to claim 7 , wherein

the actuator unit further includes a third actuator that moves the movable body along a direction of a third axis different from the first axis and the second axis, and

the signal generation unit is configured to further supply the driving signal to the third actuator.

12. The tactile sense presentation apparatus according to claim 1 , wherein

the actuator unit includes a piezoelectric device, and functions as a touch sensor that detects position on the movable body, of a target object that touches the movable body.

13. A tactile sense presentation apparatus, comprising:

a movable body;

an actuator unit connected to the movable body, the actuator unit comprising a first actuator; and

a reception unit configured to receive a driving signal and to supply the driving signal to the first actuator such that the driving signal generates a vibration on the movable body, the vibration having, within a single vibration period of the movable body, a first amplitude and/or frequency during a first portion of the single vibration period in which the movable body is moved in a first direction and a second amplitude and/or frequency, different from the first amplitude and/or frequency, during a second portion of the single vibration period in which the movable body is moved in a second direction opposite to the first direction.

14. A signal generation device, comprising:

a signal generation unit configured to supply a driving signal to an actuator connected to a movable body of a tactile sense presentation apparatus such that the driving signal generates a vibration on the movable body, the vibration, having within a single vibration period of the movable body, a first amplitude and/or frequency during a first portion of the single vibration period in which the movable body is moved in a first direction and a second amplitude and/or frequency, different from the first amplitude and/or frequency, during a second portion of the single vibration period in which the movable body is moved in a second direction opposite to the first direction; and

a transmission unit configured to transmit the generated driving signal.

15. A signal generation device configured to supply, to an actuator connected to a movable body, a driving signal such that a vibration is generated on the movable body, the vibration providing directionality to a frictional force between the movable body and a target object in contact with the movable body, wherein the signal generation device is configured to generate the driving signal such that the actuator moves the movable body, within a single vibration period of the movable body, along a first direction at a first frequency during a first portion of the single vibration period and along a second direction opposite to the first direction at a second frequency different from the first frequency during a second portion of the single vibration period.

16. A tactile sense presentation apparatus, comprising:

a movable body;

an actuator unit connected to the movable body, the actuator unit comprising a first actuator; and

a signal generation unit configured to supply, to the first actuator, a driving signal such that a vibration is generated on the movable body, wherein direction of a frictional force between the movable body and a target object that contacts the movable body is variably controlled, wherein the signal generation unit is configured to generate the driving signal such that the movable body moves, within a single vibration period of the movable body, along a first direction at a first frequency during a first portion of the single vibration period and along a second direction opposite to the first direction at a second frequency different from the first frequency during a second portion of the single vibration period.

17. The tactile sense presentation apparatus according to claim 16 , wherein

the signal generation unit is configured to supply, to the actuator unit, a driving signal such that a vibration having magnitude of the frictional force variably controlled is generated on the movable body.

18. The tactile sense presentation apparatus according to claim 16 , further comprising

a touch sensor on the movable body, wherein the signal generation unit supplies the driving signal to variably control direction of the frictional force, according to a position of the target object detected by the touch sensor.

19. The tactile sense presentation apparatus according to claim 18 , further comprising

a display panel on the movable body, wherein the signal generation unit supplies the driving signal to variably control direction of the frictional force on the basis of height data of a touching position of the target object, which is data on a height of an image displayed on the display panel.

20. The tactile sense presentation apparatus according to claim 18 , further comprising

a display panel on the movable body, wherein the signal generation unit supplies the driving signal to variably control the frictional force on the basis of a position of one key touching the target object, among a plurality of keys included in a keyboard image displayed on the display panel.

21. The tactile sense presentation apparatus according to claim 16 , wherein

the signal generation unit generates, on the movable body, a vibration that generates a frictional force against a movement of the target object to express a virtual upward slope feeling, and a vibration that generates a force along the movement of the target object to express a virtual downward slope feeling.

22. A tactile sense presentation system, comprising:

a tactile sense presentation apparatus including

a movable body,

an actuator unit connected to the movable body, the actuator unit comprising a first actuator, and

a reception unit configured to receive a signal from outside; and

a signal generation device including

a signal generation unit configured to generate a driving signal and to supply the driving signal to the first actuator such that a vibration is generated on the movable body, the vibration having within a vibration period at least one of a plurality of different amplitudes and a plurality of different frequencies, wherein the signal generation unit is configured to generate the driving signal such that the first actuator moves the movable body, within a single vibration period of the movable body, along a first direction at a first frequency during a first portion of the single vibration period and along a second direction opposite to the first direction at a second frequency different from the first frequency during a second portion of the single vibration period, and

a transmission unit configured to transmit the generated driving signal to the tactile sense presentation apparatus.

23. A tactile sense presentation method, comprising:

supplying a driving signal to an actuator unit, the actuator unit comprising a first actuator connected to a movable body, the driving signal generating a vibration on the movable body, the vibration having, within a single vibration period of the movable body, a first amplitude and/or frequency during a first portion of the single vibration period in which the movable body is moved in a first direction and a second amplitude and/or frequency, different from the first amplitude and/or frequency, during a second portion of the single vibration period in which the movable body is moved in a second direction opposite to the first direction;

driving, by the first actuator, the movable body connected to the first actuator on the basis of the supplied driving signal.

24. A tactile sense presentation method, comprising:

supplying, to an actuator unit connected to a movable body, the actuator unit comprising a first actuator, a driving signal such that a vibration is generated on the movable body, wherein direction of a frictional force between the movable body and a target object that contacts the movable body is variably controlled, wherein the driving signal is generated such that the first actuator moves the movable body, within a single vibration period of the movable body, along a first direction at a first frequency during a first portion of the single vibration period and along a second direction opposite to the first direction at a second frequency different from the first frequency during a second portion of the single vibration period; and

driving the movable body by the first actuator supplied with the driving signal.

25. The tactile sense presentation method according to claim 24 , wherein

the step of supplying the driving signal includes supplying, to the actuator unit, a driving signal such that a vibration having magnitude of the frictional force variably controlled is generated on the movable body.

26. The tactile sense presentation method according to claim 24 , further comprising:

detecting a position of the target object on a touch sensor on the movable body, wherein the step of supplying the driving signal includes supplying the driving signal to variably control the direction of the frictional force, according to the position of the target object detected by the touch sensor.