Tactile sensation providing apparatus and control method for tactile sensation providing apparatus
A tactile sensation providing apparatus capable of providing a constant tactile sensation to a user regardless of a position of a touch input is provided. According to the present invention, the tactile sensation providing apparatus has a touch sensor configured to detect the touch input, a load detection unit configured to detect a pressure load on a touch face of the touch sensor, a tactile sensation providing unit configured to vibrate the touch face, and a control unit configured to control drive of the tactile sensation providing unit based on a pushed position, when the pressure load detected by the load detection unit satisfies a standard to provide a tactile sensation, such that the tactile sensation is provided to an object pressing the touch face by vibration with certain amplitude independent of the pushed position.
1. A tactile sensation providing apparatus comprising:
a touch sensor configured to detect a touch input;
a plurality of support members configured to support the touch sensor;
a load detection unit configured to detect a pressure load on a touch face of the touch sensor;
a tactile sensation providing unit configured to vibrate the touch face; and
a control unit configured to control drive of the tactile sensation providing unit based on a pushed position and voltage adjustment information corresponding to the pushed position, when the pressure load detected by the load detection unit satisfies a standard to provide a tactile sensation, such that the tactile sensation is provided to an object pressing the touch face by vibration with constant amplitude,
wherein the voltage adjustment information is set for each of a plurality of areas of the touch screen, at least some of which vary in size along at least one edge of the touch face between corners of the at least one edge in accordance with the position of the plurality of support members, and the constant amplitude is same independent of the pushed position.
2. The tactile sensation providing apparatus according to claim 1 , wherein
the touch face includes plural areas, and the control unit controls the tactile sensation providing unit based on adjustment information set for each of the plural areas of the touch face in a size corresponding to a position on the touch face such that the tactile sensation is provided by the vibration with the constant amplitude.
3. The tactile sensation providing apparatus according to claim 2 , wherein
the plural areas to be set with the adjustment information are divided based on a position of the tactile sensation providing unit.
4. The tactile sensation providing apparatus according to claim 1 , wherein
the control unit adjusts a voltage to be applied to the tactile sensation providing unit based on the pushed position such that the tactile sensation providing unit provides the tactile sensation by the vibration with the constant amplitude.
5. The tactile sensation providing apparatus according to claim 1 , wherein
the control unit adjusts a phase of the vibration of the tactile sensation providing unit based on the pushed position such that the tactile sensation providing unit provides the tactile sensation by the vibration with the constant amplitude.
6. The tactile sensation providing apparatus according to claim 1 , wherein
the control unit controls drive of the tactile sensation providing unit to provide the tactile sensation as a click sensation by the vibration with the constant amplitude.
7. The tactile sensation providing apparatus according to claim 1 , at least one of the plurality of areas of the touch screen between the corners of the at least one edge is larger than an area adjacent to a corner area.
8. A control method for a tactile sensation providing apparatus including
a touch sensor configured to detect a touch input,
a plurality of support members configured to support the touch sensor;
a load detection unit configured to detect a pressure load on a touch face of the touch sensor, and
a tactile sensation providing unit configured to vibrate the touch face, comprising the step of:
controlling drive of the tactile sensation providing unit based on a pushed position and voltage adjustment information corresponding to the pushed position, when the pressure load detected by the load detection unit satisfies a standard to provide a tactile sensation, such that the tactile sensation is provided to an object pressing the touch face by vibration with constant amplitude,
wherein the voltage adjustment information is set for each of a plurality of areas of the touch screen, at least some of which vary in size along at least one edge of the touch face between corners of the at least one edge in accordance with the position of the plurality of support members, and the constant amplitude is same independent of the pushed position.
9. The tactile sensation providing apparatus according to claim 8 , at least one of the plurality of areas of the touch screen between the corners of the at least one edge is larger than an area adjacent to a corner area.
10. A tactile sensation providing apparatus comprising:
a touch sensor configured to detect a touch input;
a plurality of support members configured to support the touch sensor;
a piezoelectric element mounted on the touch sensor; and
a control unit configured to detect a pressure load on a touch face of the touch sensor based on an output signal of the piezoelectric element and, when the pressure load detected satisfies a standard to provide a tactile sensation, to control drive of the piezoelectric element based on a pushed position and voltage adjustment information corresponding to the pushed position, such that the tactile sensation is provided to an object pressing the touch face by vibration with constant amplitude, wherein the voltage adjustment information is set for each of a plurality of areas of the touch screen, at least some of which vary in size along at least one edge of the touch face between corners of the at least one edge in accordance with the position of the plurality of support members, and the constant amplitude is same independent of the pushed position.
11. The tactile sensation providing apparatus according to claim 10 , wherein
the control unit controls the piezoelectric element based on adjustment information set for each of areas in a size corresponding to a position on the touch face such that the tactile sensation is provided by the vibration with the constant amplitude.
12. The tactile sensation providing apparatus according to claim 11 , wherein
the areas to be set with the adjustment information are divided based on a position of the piezoelectric element.
13. The tactile sensation providing apparatus according to claim 10 , wherein
the control unit adjusts a voltage to be applied to the piezoelectric element based on the pushed position such that the piezoelectric element provides the tactile sensation by the vibration with the constant amplitude.
14. The tactile sensation providing apparatus according to claim 10 , wherein
the control unit adjusts a phase of the vibration of the piezoelectric element based on the pushed position such that the piezoelectric element provides the tactile sensation by the vibration with the constant amplitude.
15. The tactile sensation providing apparatus according to claim 10 , wherein
the control unit controls drive of the piezoelectric element to provide the tactile sensation as a click sensation by the vibration with the constant amplitude.
16. The tactile sensation providing apparatus according to claim 10 , at least one of the plurality of areas of the touch screen between the corners of the at least one edge is larger than an area adjacent to a corner area.
17. A control method for a tactile sensation providing apparatus including
a touch sensor configured to detect a touch input,
a plurality of support members configured to support the touch sensor, and
a piezoelectric element mounted on the touch sensor, comprising the step of:
detecting a pressure load on a touch face of the touch sensor based on an output signal of the piezoelectric element and, when the pressure load detected satisfies a standard to provide a tactile sensation, controlling drive of the piezoelectric element based on a pushed position and voltage adjustment information corresponding to the pushed position, such that the tactile sensation is provided to an object pressing the touch face by vibration with constant amplitude, wherein the voltage adjustment information is set for each of a plurality of areas of the touch screen, at least some of which vary in size along at least one edge of the touch face between corners of the at least one edge in accordance with the position of the plurality of support members, and the constant amplitude is same independent of the pushed position.
18. The tactile sensation providing apparatus according to claim 17 , at least one of the plurality of areas of the touch screen between the corners of the at least one edge is larger than an area adjacent to a corner area.