Tactile sense presentation device, mobile unit including same, and tactile sense presentation method

1. A tactile sense presentation device, comprising:

a supporting substrate;

a plurality of X-electrodes extended in parallel to each other along a first direction on the supporting substrate;

a plurality of Y-electrodes extended in parallel to each other along a second direction on the supporting substrate by being insulated from the X-electrodes; and

a driving circuit which applies a first-frequency voltage signal to the X-electrode corresponding to information regarding a target region inputted from outside among the plurality of X-electrodes, and applies a second-frequency voltage signal to the Y-electrode corresponding to information regarding the target region inputted from outside among the plurality of Y-electrodes, wherein:

at least one of the first and second frequencies is a value that alone does not present a tactile sensation,

there is a period where an absolute value of a difference between the first and second frequencies is larger than 10 Hz and less than 1000 Hz, and

the driving circuit includes a function which grounds an electrode to which the first-frequency voltage signal is not applied among the plurality of X-electrodes and an electrode to which the second-frequency voltage signal is not applied among the plurality of Y-electrodes or applies a direct current voltage to such electrodes.

2. The tactile sense presentation device of claim 1 , wherein

on a plan view of the supporting substrate, the X-electrodes and the Y-electrodes are both formed by coupling a plurality of rhombic electrodes in a form like a string of beads via connection parts,

the X-electrodes and the Y-electrodes overlap with each other in the connection parts, and

the rhombic parts of the X-electrodes and the Y-electrodes are neighboring to each other.

3. A mobile unit, comprising:

an electronic apparatus loaded as an on-vehicle device, the electronic apparatus comprising:

a touch-panel type display device which displays a processing result executed by a processor provided therein and accepts an operation input which corresponds to the processing result; and

the tactile sense presentation device as claimed in claim 1 that presents a tactile sensation corresponding to the display of the processing result.

4. A tactile sense presentation device, comprising:

a supporting substrate;

a plurality of X-electrodes extended in parallel to each other along a first direction on the supporting substrate;

a plurality of Y-electrodes extended in parallel to each other along a second direction on the supporting substrate by being insulated from the X-electrodes; and

a driving circuit which applies a first-frequency voltage signal to the X-electrode corresponding to information regarding a target region inputted from outside among the plurality of X-electrodes, and applies a second-frequency voltage signal to the Y-electrode corresponding to information regarding the target region inputted from outside among the plurality of Y-electrodes, wherein:

at least one of the first and second frequencies is a value that alone does not present a tactile sensation,

there is a period where an absolute value of a difference between the first and second frequencies is larger than 10 Hz and less than 1000 Hz,

in a plurality of prescribed target regions, an absolute value of a difference of the frequencies of voltage signals applied by the driving circuit to the X-electrodes and the Y-electrodes contained in the target regions is larger than 10 Hz and less than 1000 Hz, and

in intersection parts excluding the target regions, which are formed by the X-electrodes or the Y-electrodes constituting the target regions, an absolute value of a difference in the frequencies of the voltage signals applied to the X-electrodes and the Y-electrodes forming the intersection parts is 10 Hz or less or 1000 Hz or more.

5. A tactile sense presentation device, comprising:

a supporting substrate;

a plurality of X-electrodes extended in parallel to each other along a first direction on the supporting substrate;

a plurality of Y-electrodes extended in parallel to each other along a second direction on the supporting substrate by being insulated from the X-electrodes; and

a driving circuit which applies a first-frequency voltage signal to the X-electrode corresponding to information regarding a target region inputted from outside among the plurality of X-electrodes, and applies a second-frequency voltage signal to the Y-electrode corresponding to information regarding the target region inputted from outside among the plurality of Y-electrodes, wherein:

at least one of the first and second frequencies is a value that alone does not present a tactile sensation,

there is a period where an absolute value of a difference between the first and second frequencies is larger than 10 Hz and less than 1000 Hz,

the driving circuit includes a function which applies the first-frequency voltage signal to the X-electrodes corresponding to information regarding the target region inputted from outside among the plurality of X-electrodes and applies the second-frequency voltage signal to the Y-electrodes corresponding to information regarding the target region among the plurality of Y-electrodes, and changes at least one of the first and second frequencies chronologically within a range that is not lower than 500 Hz.

6. The tactile sense presentation device as claimed in claim 5 , wherein there is a first period where an absolute value of a difference between the first frequency and the second frequency is larger than 10 Hz and less than 1000 Hz, and

there is a second period where an absolute value of a difference between the first frequency and the second frequency is 10 Hz or less or 1000 Hz or more.

7. The tactile sense presentation device as claimed in claim 6 , wherein

the first period and the second period are set alternately.

8. The tactile sense presentation device as claimed in claim 5 , wherein

the driving circuit continuously changes at least one of the first and second frequencies in a range that is not lower than 500 Hz according to time.

9. An electronic apparatus, comprising:

a touch-panel type display device which displays a processing result executed by a processor provided therein and accepts an operation input which corresponds to the processing result; and

the tactile sense presentation device as claimed in claim 1 , which presents a tactile sensation corresponding to the display of the processing result.

10. A tactile sense presentation method comprising steps of:

providing a tactile sense presentation device, comprising:

a supporting substrate,

a plurality of X-electrodes extended in parallel to each other along a first direction on the supporting substrate,

a plurality of Y-electrodes extended in parallel to each other along a second direction on the supporting substrate by being insulated from the X-electrodes, and

a driving circuit which applies a first-frequency voltage signal to the X-electrode corresponding to information regarding a target region inputted from outside among the plurality of X-electrodes, and applies a second-frequency voltage signal to the Y-electrode corresponding to information regarding the target region inputted from outside among the plurality of Y-electrodes, wherein:

at least one of the first and second frequencies is a value that alone does not present a tactile sensation,

there is a period where an absolute value of a difference between the first and second frequencies is larger than 10 Hz and less than 1000 Hz, and

the driving circuit includes a function which grounds an electrode to which the first-frequency voltage signal is not applied among the plurality of X-electrodes and an electrode to which the second-frequency voltage signal is not applied among the plurality of Y-electrodes or applies a direct current voltage to such electrodes;

providing information by a control unit regarding a target region inputted from outside to a driving circuit; and

applying, by the driving circuit, a first-frequency voltage signal to the X-electrodes corresponding to the target region, and applying a second-frequency voltage signal to the Y-electrodes corresponding to the target region to generate electric beat oscillation in the target region by an absolute value of a difference between the first and second frequencies.