User interface device and method of controlling tactile presentation
A user interface device includes a knob device having a mechanical structure that presents a tactile stimulus in response to every predetermined amount of knob operation, a panel on which the knob device is mounted, a controller, and a vibration generator configured to vibrate the knob device, the vibration generator being controllable by the controller. The controller controls the vibration generator to make the knob device vibrate synchronously with the predetermined amount of knob operation for the knob device to present a tactile stimulus in addition to the tactile stimulus by the mechanical structure.
1 . A user interface device comprising:
a knob device having a mechanical structure that presents a tactile stimulus in response to every predetermined amount of knob operation;
a panel on which the knob device is mounted;
a controller; and
a vibration generator configured to vibrate the knob device, the vibration generator being controllable by the controller,
wherein the controller controls the vibration generator to make the knob device vibrate synchronously with the predetermined amount of knob operation for the knob device to present a tactile stimulus in addition to the tactile stimulus by the mechanical structure.
2 . The user interface device according to claim 1 , wherein the vibration of the knob device synchronized with the predetermined amount of knob operation is generated at every predetermined amount of knob operation.
3 . The user interface device according to claim 1 , wherein a drive pulse for the vibration generator in order to make the knob device vibrate synchronously with the predetermined amount of knob operation consists of a plurality of isolated sine waves.
4 . The user interface device according to claim 1 , wherein the vibration generator includes an actuator mounted on the panel and driven by a drive signal.
5 . The user interface device according to claim 1 , wherein the vibration of the knob device caused by the vibration generator is generated only when a predetermined condition is satisfied.
6 . The user interface device according to claim 5 ,
wherein the controller is configured to assign one function selected from a plurality of functions to the knob device,
wherein, for the selected one function, combinations of a range of a value to be adjusted by user operation and a direction of operation of the knob device are predetermined, and
wherein the controller is configured to make the vibration generator vibrate in response to operation of the knob device in the predetermined direction when the value to be varied is within the predetermined range.
7 . The user interface device according to claim 5 ,
wherein the knob device is assigned a function to adjust temperature setting of an air conditioner,
wherein the controller is configured to make the vibration generator vibrate in response to either operation of the knob device to raise the temperature setting when the temperature setting has reached an upper limit or operation of the knob device to lower the temperature setting when the temperature setting has reached a lower limit.
8 . A method of controlling tactile presentation of a user interface device including a knob device having a mechanical structure that presents a tactile stimulus in response to every predetermined amount of knob operation, a panel on which the knob device is mounted, and a vibration generator configured to vibrate the knob device, the method comprising:
controlling the vibration generator to make the knob device vibrate synchronously with the predetermined amount of knob operation for the knob device to present a tactile stimulus in addition to the tactile stimulus by the mechanical structure.
9 . The user interface device according to claim 1 ,
wherein the vibration generator includes an actuator, and
wherein the controller is configured to synchronize the vibration generated by the actuator with a mechanical tactile click of the knob device.
10 . The user interface device according to claim 1 ,
wherein the vibration generator includes an actuator, and
wherein the controller is configured to output a drive pulse to the actuator each time a mechanical tactile click of the knob device occurs, such that vibration of the actuator is phase-aligned with the timing of the mechanical tactile click of the knob device.
11 . The user interface device according to claim 1 ,
wherein the vibration generator includes an actuator, and
wherein the controller is configured to determine that the knob device has reached a lower limit or an upper limit of an adjustable range, and output a vibration pulse synchronized with a mechanical tactile click of the knob device at a position of the reached lower or upper limit to notify the user of the boundary.
12 . The user interface device according to claim 1 , wherein the vibration generator is disposed on a surface of the panel opposite a surface on which the knob device is mounted.