Patent Publication Number: US-2011057877-A1

Title: Feeling Applicator and Electronic Device

Description:
BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention relates to a feeling applicator and an electronic device. 
     2. Description of Related Art 
     Conventionally, there is known an input device which is adopted in electronic devices such as a portable terminal device, an audio-visual device, a personal computer and the like and which carries out an input operation by a rotating operation of a rotation controller. In such input device, the selection items which are displayed in the display screen of the electronic device are to be switched and selected in order in conjunction with the rotation of the rotation controller. After an operator manually rotates the rotation controller until the targeted selection item is selected, the operator carries out an operation to decide on the selection to input an instruction according to the selected selection item. 
     However, in the above described input device, each of the selection items in the screen is switched and selected by merely carrying out the rotating operation of the rotation controller. Therefore, there is a problem that it is difficult for an operator to recognize that the selection item in the screen is selected through feeling of hands and fingers. 
     In view of the above problem, in order to give an operator a tactile operational feeling, there is suggested a device in which a drive motor to carry out the rotating control of a job dial (rotation controller) is provided and which switches between a control to apply a bias rotary force in the same direction as the rotation direction of the jog dial, a control to apply a load rotary force in the opposite direction of the rotation direction of the jog dial and a control to make the jog dial rotate freely without supplying drive voltage to the drive motor according to the rotational position of the jog dial and executes the control (see, JP2003-228455). 
     In the device of JP2003-228455, however, regardless of which screen is being displayed in the display screen of the display unit, the bias rotation is carried out in the jog dial in a section approximating the selection component (selection item), the jog dial rotates freely in a section in which the selection component is selected and the lead rotation is carried out in the jog dial in a section passed the selection component. Therefore, in the device of JP2003-228455, although feeling of that each selection component is selected can be given to an operator, only a fixed operational feeling is given to an operator at any time and various types of operational feelings according to the screen displays of the display unit cannot be realized. 
     SUMMARY OF THE INVENTION 
     It is, therefore, a main object of the present invention to provide a feeling applicator and an electronic device which can give an operator various types of operational feelings in conjunction with the screen displays in the display unit. 
     According to a first aspect of the present invention, there is provided a feeling applicator including a rotation controller for receiving a rotating operation of an operator so as to rotate around an axis, a rotation detection unit for detecting a rotation of the rotation controller, a rotation drive unit for applying a rotary force to the rotation controller and a rotation control unit for applying a predetermined tactile feeling to the operator via the rotation controller by applying the rotary force to the rotation controller by executing at least one of an application of the rotary force in a normal rotation direction or an application of the rotary force in a reverse rotation direction to the rotation controller by the rotation drive unit in conjunction with a screen display in a display screen of a display unit when the rotation of the rotation controller is detected by the rotation detection unit. 
     According to a second aspect of the present invention, there is provided a feeling applicator including an operation board formed of a soft material, a feeling applicator for applying a tactile feeling to the operation board, a detection unit for detecting an operation of an operator to the operation board and a drive control unit for applying a predetermined tactile feeling to the operator via the operation board by applying the tactile feeling to the operation board by the feeling applicator in conjunction with a screen display in a display screen of a display unit when the operation of the operator to the operation board is detected by the detection unit. 
     According to a third aspect of the present invention, there is provided an electronic device including the feeling applicator and the display unit. 
     According to a fourth aspect of the present invention, there is provided an electronic device including a display unit, a rotation controller for receiving a rotating operation of an operator so as to rotate around an axis, a rotation detection unit for detecting a rotation speed and/or a rotation direction of the rotation controller, a pressure detection unit for detecting an intensity of a pressure in an axis direction to the rotation controller, a rotation drive unit for applying a rotary force to the rotation controller and a rotation control unit for applying a predetermined tactile feeling to an operator via the rotation controller by applying the rotary force to the rotation controller by executing at least one of an application of the rotary force in a normal rotation direction or an application of the rotary force in a reverse rotation direction to the rotation controller by the rotation drive unit in conjunction with a screen display in a display screen of a display unit when a rotation of the rotation controller is detected by the rotation detection unit, and the rotation control unit changes the rotary force to be applied to the rotation controller according to the rotation speed and/or the rotation direction of the rotation controller detected by the rotation detection unit and the intensity of the pressure detected by the pressure detection unit. 
     According to a fifth aspect of the present invention, there is provided an electric device including a display unit, an operation board formed of a soft material, a feeling application unit for applying a tactile feeling to the operation board, a detection unit for detection an operation of an operator to the operation board and a drive control unit for applying a predetermined tactile feeling to the operator via the operation board by applying the tactile feeling to the operation board by the feeling application unit in conjunction with a screen display in a display screen of the display unit when the operation of the operator to the operation board is detected by the detection unit. 
     According to the present invention, when an operation of an operator is carried out in a rotation controller or in an operation board, a predetermined tactile feeling is given to an operator by the rotation drive unit or the feeling applying unit in conjunction with the display screen in the display unit. Therefore, in the feeling applicator and the electronic device, various types of operational feelings in conjunction with screen displays in the display unit can be given to an operator. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The above and other objects, advantages and features of the present invention will become more fully understood from the detailed description given hereinbelow and the appended drawings which are given by way of illustration only, and thus are not intended as a definition of the limits of the present invention, and wherein: 
         FIG. 1  is a block diagram of a mobile phone including a feeling applicator of the first embodiment in which the present invention is applied; 
         FIG. 2  is a schematic diagram showing a functional structure of the mobile phone of the first embodiment; 
         FIG. 3  is a schematic diagram of the feeling applicator of the first embodiment; 
         FIG. 4  is a cross-sectional diagram cut along a line IV-IV of  FIG. 3 ; 
         FIG. 5  is an exploded diagram of the feeling applicator of the first embodiment; 
         FIG. 6  is an example of a selection screen which is displayed in a display screen of a display unit; 
         FIG. 7  is an example of the selection screen which is displayed in the display screen of the display unit; 
         FIG. 8  is an example of the selection screen which is displayed in the display screen of the display unit; 
         FIG. 9  is an example of the selection screen which is displayed in the display screen of the display unit; 
         FIG. 10  is a schematic diagram of a feeling applicator of the second embodiment; 
         FIG. 11  is a block diagram showing a functional structure of a mobile phone of the second embodiment; 
         FIG. 12  is a cross-sectional diagram cut along a line XII-XII of  FIG. 10 ; and 
         FIG. 13  is an exploded diagram of the feeling applicator of the second embodiment. 
     
    
    
     DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Here, scope of the present invention is not limited to the embodiment and the illustrated examples which are shown hereinafter. 
     In the following description, a mobile phone to make voice calls by a wireless communication will be described as an example of an electronic device of the present invention. 
     First Embodiment 
     First, a mobile phone of the first embodiment in which the present invention is applied will be described. 
     As shown in  FIGS. 1 and 2 , the mobile phone  100  of the first embodiment includes a feeling applicator  1  for an operator to carry out an input operation and a mobile phone unit  2  which is connected with the feeling applicator  1  and which is operated by the feeling applicator  1 . 
     First, the feeling applicator  1  according to the first embodiment will be described. 
     As shown in  FIGS. 2 to 5 , the feeling applicator  1  includes a rotation controller  3  which can be manually rotated by an operator and a support base  4  which is provided in the bottom surface side of the rotation controller  3  and which supports the rotation controller  3  so as to rotate, and the entire feeling applicator  1  has an approximately disk-like shape. 
     The rotational controller  3  includes an upper surface unit  31  of a circular-shape having an opening  31   a  at the center thereof and a circumference unit  32  which protrudes downward from the edge portion of the upper surface unit  31  along the entire circumference, and the rotation controller  3  forms the upper surface and the circumference surface of the feeling applicator  1  by being provided at a position covering the upper side of the support base  4 . The upper surface unit  31  is an operation surface P for an operator to carry out a rotating operation, and an operator carries out an input operation to the mobile phone unit  2  by rotating the rotation controller  3  while holding a point in the upper surface unit  31  with a fingertip or by pinching the circumference unit  32 . The rotation controller  3  may be formed with a material having a heat dissipation characteristic such as aluminum or a material having a high tolerance to impact from outside, for example. Further, the rotation controller  3  may be formed with a resin or the like. 
     The support base  4  includes abase  41  and a PCB substrate  42  which is connected to the base  41 , and the support base  4  forms the bottom surface of the feeling applicator  1  by being provided at a position covering the opening of the bottom side of the rotation controller  3 . 
     The base  41  includes a pedestal  411  of an approximately donut-disk shape having an opening at the center thereof and four extending units  412  which extend outside from the margin  411   a  of the pedestal  411 , and a screw hole  412   a  for screwing a screw and a protrusion  412   b  to extends downward from the lower surface more in outside than the screw hole  412   a  are provided at each of the extending portions  412 . The base  41  is formed of a material such as polycarbonate, for example. 
     The PCB substrate  42  is formed in a flat circular ring shape having approximately same diameter as the rotation controller  3 , and the pedestal  411  of the base  41  is fitted and attached at an approximately center in the opening  421 . Further, mounting holes  422  for attaching protrusions  412   b  which are provided so as to protrude at the lower surface of each of the extending units  412  of the base  41  are provided at the PCB substrate  42 . Furthermore, the PCB substrate  42  and the base  41  are integrally connected by mounting the pedestal  411  of the base  41  in the opening  421  of the PCB substrate  42  so as to be fitted and by fitting each of the protrusions  412   b  of the base  41  in each of the mounting holes  422  of the PCB substrate  42 . 
     Moreover, four holes  423  in which the diameter is slightly larger than the screw holes  412   a  are provided at the PCB substrate  42  at positions overlapping the screw holes  412   a  of the base  41  so as to correspond to each of the screw holes  412   a . The PCB substrate  42  and the base  41  are fixed to each other by screws  43  such as thin cap screws being screwed with the screw holes  412   a  of the base  41  from the lower surface side of the PCB substrate  42  via the holes  423  of the PCB substrate  42 . 
     Further, four pressure sensitive sensors (pressure detection units)  9   a  to  9   d  for detecting the pressure of the rotating operation of an operator are disposed at the back side  42   a  of the PCB substrate  42 . 
     Furthermore, a bearing  5  is disposed at the inner circumference of the opening  31   a  of the upper surface section  31  of the rotation controller  3  and a through hole  5   a  in which a screw  6  which becomes the rotation axis (axis) of the rotation controller  3  is provided at the center of the bearing  5 . Moreover, the screw  6  and the support base  4  are fixed to each other by the screw  6  such as a countersunk screw or the like is inserted in the through hole  5   a  of the bearing  5  from the upper side of the rotation controller  3  and by the lower end of the screw  6  protruding downward being screwed to the female screw  413   a  which is formed at the inner circumference of the opening  413  at the center of the base  41 . In such way, the rotation controller  3  is connected to the support base  4  so as to rotate freely around the screw  6 . 
     Moreover, a space S is formed between the rotation controller  3  and the support base  4 . In the space S, a rotation detection unit (rotation detection device)  7  for detecting the rotation angle of the rotation controller  3 , an ultrasonic motor (rotation drive device)  8  for rotating the rotation controller  3 , a control unit  10  for controlling each part of the feeling applicator  1 , an input/output unit  11  for carrying out sending and receiving of various types of signals with the mobile phone unit  2  and the like are disposed. 
     The rotation detection section  7  includes a ring-shaped code wheel  71  and a photo interrupter  72  for detecting the rotation angle displacement of the code wheel  71 , for example. 
     The code wheel  71  is fixed at the back side  33  of the upper surface unit  31  of the rotation controller  3  and rotates in conjunction with the rotation of the rotation controller  3 . At the lower surface  71   a  of the code wheel  71 , a reflection surface to reflect a light is printed at a predetermined pitch along the circumferential direction in two detection patterns of A phase and B phase. 
     The photo interrupter  72  is a reflection type photo interrupter which is formed of a light emitting element  72   a  such as a LED and a light receiving element  72   b  such as a photo IC. The photo interrupter  72  is mounted on the PCB substrate  42  at a position facing the code wheel  71  and is connected with the control unit  10 . Further, the light receiving element  72   b  includes at least two light receiving surfaces to output the detection signals of A phase and B phase having a phase difference of 90 degrees from each other. The photo interrupter  72  detects the amount of rotation and the rotation direction of the rotation controller  3  to output as the detection signals of A phase and B phase to the control unit  10  by receiving and counting the reflection light of the light which is emitted by the light emitting element  72   a  toward the code wheel  71  with the light receiving element  72   b . In the control unit  10 , the rotation speed, rotation direction and rotation angle of the rotation controller  3  are specified based on the detection signals of A phase and B phase detected from the photo interrupter  72  which indicate the amount of rotation and rotation direction of the rotation controller  3 . 
     The ultrasonic motor  8  includes a piezoelectric element  81 , a ring-shape stator  82 , a rotor  83  which contacts the upper surface of the stator  82  and the like. The ultrasonic motor  8  is driven by the control of the control unit  10  and allows the rotation controller  3  rotate around the screw  6  as a rotation axis. 
     The stator  82  is engaged with a ring-shape concave portion  414  formed at the upper surface of the base  41  and is fixed to the base  41  by a flat circular ring shape double-faced tape  84 . At the upper portion of the stator  82 , a plurality of convex portions  821  are disposed along the circumferential direction, further, in the lower surface side of the stator  82 , a plurality of piezoelectric elements  81  which generate vibration energy according to application of voltage are disposed along the circumferential direction of the stator  82 . The rotor  83  is formed of a material such as high polymer polyethylene, for example, and has a flat circular ring shape. Further, the rotor  83  is disposed at a position in the inner circumference side of the code wheel  71  and at a position so as to be in between the stator  82  and the rotation controller  3 . 
     Moreover, in between the rotation controller  3  and the rotor  83 , a flat circular ring shape double-faced tape  85  is disposed, and each face of the double-faced tape  85  is respectively attached to the back side  33  of the rotation controller  3  and the upper surface of the rotor  83 . The upper surface of the rotor  83  is attached to the lower surface of the double-faced tape  85  which is attached to the back side  33  of the rotation controller  3 , further, the lower surface of the rotor  83  is provided so as to contact the convex portions  821  of the stator  82 . The lower surface of the rotor  83  has a high friction coefficient, and the rotor  83  is to rotate in the opposite direction of the direction of progressive wave which is generated by the vibration of the stator  82  which contacts the lower surface of the rotor  83 . 
     Further, when the drive signal is applied to the piezoelectric element  81  by the control unit  10 , the entire stator  82  vibrates by the ultrasonic vibration of the piezoelectric element  81  and the progressive wave is transmitted to the rotor  83  and the rotor  83  rotates. Then, the rotary force of the rotor  83  is transmitted to the rotation controller  3 , and thereby, the rotation controller  3  rotates. Furthermore, by controlling the drive frequency of the drive signal which is to be applied to the piezoelectric element  81 , the intensity of the rotary force by the ultrasonic vibration of the piezoelectric element  81  and the rotation direction of the rotation controller  3  can be set freely. 
     The double-faced tapes  84  and  85  are formed of a gel material such as acrylic foam or a rubber material, for example. Therefore, the double-faced tapes  84  and  85  which are respectively disposed in the upper side and in the lower side of the stator  82  function as dampers to absorb noise which occurs when the stator  82  is driven. 
     The pressure sensitive sensors  9   a  to  9   d  are fixed at the back side  42   a  of the PCB substrate  42  so as to have an interval of 90° in the circumferential direction. Each of the pressure sensitive sensors  9   a  to  9   d  are connected to the control unit  10  and each of the pressure sensitive sensors  9   a  to  9   d  detects the intensity of the pressure in the axis direction applied to the rotation controller  3  at the time of rotating operation of the rotation controller  3  by an operator and outputs the detected intensity of the pressure to the main control unit  24  via the control unit  10 . In the main control unit  24 , the pressure in the axis direction of the rotating operation is specified based on the pressure detection signals each of which are outputted from the four pressure sensitive sensors  9   a  to  9   d , respectively. 
     As for the pressure sensitive sensors  9   a  to  9   d , pressure sensitive sensors of a resistive film type, a diffusion type, a film formation type, an electric capacity type, a mechanical type or the like can be used, for example. 
     Moreover, the above mentioned rotation controller  3 , code wheel  71  and rotor  83  are disposed on the same axis and they are made so as to rotate around the screw  6  which is fixed to the support base  4  as the rotation axis. 
     The control unit  10  includes a CPU (Central Processing Unit), a RAM (Random Access Memory), a ROM (Read Only Memory) (all are omitted from the drawing) and the like, and the control unit  10  is connected with the main control unit  24 . The control unit  10  controls each part of the feeling applicator  1  and also carries out sending and receiving of various types of signals with the main control unit  24  via the input/output unit  11 . 
     The input/output unit  11  is connected with the mobile phone unit  2  and transmits detection results and the like of various types of sensors to the main CPU  241  of the mobile phone unit  2 . 
     In particular, the input/output unit  11  outputs the detection signals of A phase and B phase which indicate the amount of rotation and the rotational direction of the rotation controller  3  which are outputted from the photo interrupter  72  of the rotation detection unit  7  and the pressure detection signals which are outputted from the four pressure sensitive sensors  9   a  to  9   d  which are disposed at the back side  42   a  of the PCB substrate  42  to the main control unit  24 . Further, from the main control unit  24 , the drive signal for driving the ultrasonic motor  8  is inputted to the input/output unit  11 . 
     Next, the mobile phone unit  2  according to the first embodiment will be described. 
     As shown in  FIG. 2 , the mobile phone unit  2  includes an antenna (omitted from the drawing), a communication unit  21  for sending and receiving wireless signals with an external device, a speaker (omitted from the drawing), a microphone (omitted from the drawing), a conversation communication unit  22  for carrying out input/output of sound, a display screen  23   a , a display unit  23  for displaying various types of screen in the display screen  23   a  and the main control unit  24  for integrally controlling the entire mobile phone  100 . Here, well known techniques are used for the communication unit  21  and for the conversation communication unit  22 , therefore, detail descriptions will be omitted. 
     The display unit  23  includes the display screen  23   a  such as LCD (Liquid Crystal Display) or the like, and the display unit  23  displays various types of screens in the display screen  23   a  according to an instruction from the main control unit  24 . 
     The main control unit  24  includes a main CPU (Central Processing Unit)  241 , a RAM (Random Access Memory)  242 , a ROM (Read Only Memory)  243  and the like, and the main control unit  24  is connected with the control unit  10 . The main control unit  24  controls each part of the mobile phone unit  2  based on the input operation signal which is transmitted from the feeling applicator  1 . 
     The main CPU  241  controls the entire mobile phone  100  by reading out the process programs and the like stored in the ROM  243  and expanding the process program in the RAM  242  to execute according to the input signal which is inputted from each part of the mobile phone unit  2  and the feeling applicator  1  and by outputting the control signal to each of the units. 
     The RAM  242  includes a program storage region for expanding various types of programs which are to be executed by the main CPU  241  and a data storage region for storing input data and process results and the like which are obtained at the time when the process programs are executed, and the RAM  242  is used as a work area of the main CPU  241 . 
     The ROM  243  stores the process programs, data and the like in advance, and for example, the ROM  243  stores a rotation detection program  243   a , a pressure detection program  243   b , a rotation control program  243   c  and the like. 
     The rotation detection program  243   a  is a program to make the main CPU  241  realize a function to detect the rotation speed and the rotation direction (rotation) of the rotation controller  3 . In the present invention, the rotation detection device is structured with the rotation detection program  243   a , the main CPU  241  and the rotation detection unit  7 . 
     The pressure detection program  243   b  is a program to make the main CPU  241  realize a function to detect intensity of the pressure in the axis direction to the rotation controller  3 . In the present invention, the pressure detection device is structured with the pressure detection program  243   b , the main CPU  241  and the pressure sensitive sensors  9   a  to  9   d.    
     The rotation control program  243   c  is a program to make the main CPU  241  realize a function to give an operator a predetermined tactile feeling via the rotation controller  3  by applying rotary force to the rotation controller  3  by executing at least one of the application of rotary force in the normal rotation direction to the rotation controller  3  or the application of rotary force in the reverse rotation direction to the rotation controller  3  by the ultrasonic motor  8  in conjunction with the screen display in the display screen  23   a  of the display unit  23  when the rotation of the rotation controller is detected in the execution of the rotation detection program  243   a . In the embodiment, the rotation control device is structured with the rotation control program  243   c  and the main CPU  241 . 
     Further, in the embodiment, the feeling applicator of the present invention is structured with the above mentioned rotation detection unit  7 , ultrasonic motor  8 , pressure sensitive sensors  9   a  to  9   d , control unit  10 , input/output unit  11  and main control unit  24 . 
     Here, a tactile feeling by vibration and a tactile feeling by sense of force are included in “a predetermined tactile feeling”. The “sense of force” is a feeling of heft to a finger when rotating the rotation controller  3  and is the way of sensing that the rotation is light or that the rotation is heavy. An operator can be provided with more clearer operational feeling by giving the tactile feeling by the sense of force to a fingertip of the operator. 
     Here, the rotation drive process which is to be carried out by the execution of the above mentioned rotation detection program  243   a , pressure detection program  243   b  and rotation control program  243   c  will be described, and also, the operation of the mobile phone  100  of the embodiment will be described in detail. 
     When a screen in which a plurality of selection items are displayed is displayed in the display screen  23   a  which is included in the mobile phone unit  2  (hereinafter, the screen in the display screen  23   a  in which a plurality of selection items are displayed is called “selection screen”), an operator selects the targeted selection item among the selection items displayed in the selection screen by rotating the rotation controller  3  while holding a point in the operation surface P of the rotation controller  3 . Further, after the targeted selection item is selected by the rotating operation of the rotation controller  3 , an operator carries out an input operation to the mobile phone unit  2  by carrying out a deciding operation to decide the selected selection item. 
     As described above, when the rotating operation is carried out to the rotation controller  3  by an operator, the detection signals of A phase and B phase indicting the amount of rotation and the rotation direction of the rotation controller  3  are outputted from the rotation detection unit  7  to the main control unit  24  via the control unit  10  and the input/output unit  11 . Further, in the main control unit  24 , exist/not-exist of rotation of the rotation controller  3  is being monitored based on the signal input from the rotation detection unit  7 , and when the detections signals of A phase and B phase are inputted from the rotation detection unit  7 , the main control unit  24  determines that the rotation controller  3  rotated. Then, the main control unit  24  outputs the drive signal to the ultrasonic motor  8  to drive the ultrasonic motor  8  to drive the rotation controller  3  so as to rotate so that a predetermined tactile feeling is given to an operator which is operating the rotation controller  3 . 
     Further, in time of driving of the ultrasonic motor  8 , the main control unit  24  specifies the rotation direction of the rotation controller  3 , the rotation speed of the rotation controller  3  and the pressure in the axis direction to the rotation controller  3  based on the detection signals of A phase and B phase which are inputted from the rotation detection unit  7  and the detection signals which are outputted from the four pressure sensitive sensors  9   a  to  9   b  which are disposed at the back side  42   a  of the PCB substrate  42 . Further, the rotary force given to the rotation controller  3  is to be changes based on the specified rotation direction and rotation speed of the rotation controller  3  and the specified pressure in the axis direction to the rotation controller  3 . 
     In particular, the main control unit  24  controls so as to apply the rotary force in the same direction as the rotation direction of the rotation controller  3  or to apply the rotary force in the opposite direction of the rotation direction of the rotation controller  3  in conjunction with the screen display in the display screen based on the rotation direction of the rotation controller  3 . Further, the main control unit  24  controls so as to apply the rotary force to the rotation controller  3  in shorter cycle as the rotation speed of the rotation controller  3  becomes faster based on the rotation speed of the rotation controller  3 . Furthermore, the main control unit  24  controls so as to apply a larger rotary force to the rotation controller  3  as the pressure in the axis direction to the rotation controller  3  becomes larger based on the pressure in the axis direction to the rotation controller  3 . 
     Moreover, in the main control unit  24 , the rotation angle of the rotation controller  3  is specified based on the detection signals indicating the amount of rotation and the rotation angle which are outputted from the rotation detection unit  7 , and whether the specified rotation angle is the selected angle which corresponds to the selection item which can be selected in the selection screen or not is monitored. In a case where the rotation angle of the rotation controller  3  is the selected angle which corresponds to the selection item which can be selected in the selection screen, the main control unit  24  generates a switching signal to switch the selection of selection of selection items in the selection screen and outputs the generated switching signal to the display unit  23  to execution the display control to switch the selection item in the selection screen which is displayed in the display screen  23   a.    
     In such way, in the embodiment, the selection items which are displayed in the display screen  23   a  can be selected by the rotating operation of the rotation controller  3 , and also, the rotary force by the drive of the ultrasound motor  8  is to be applied to the rotation controller in conjunction with the rotating operation of the rotation controller  3 . Further, the direction, cycle and intensity of the rotary force to be applied to the rotation controller  3  can be changed by changing the direction (rotation direction) in which the rotation controller  3  is rotated, the speed (rotation speed) by which the rotation controller  3  is rotated and intensity of the pressure to the rotation controller  3 . 
     Here, a selecting process of the selection items displayed in the display screen  23   a  and a rotary force applying process to the rotation controller  3  will be described by using a specific example. 
       FIG. 6  is an example of the selection screen displayed in the display screen  23   a  of the display unit  23 . In the selection screen of  FIG. 6 , twelve selection items (selection items which can be selected) are displayed so as to be arranged in a ring shape having equal spaces therebetween. Further, the selection item which is selected (the selection item “AAA” in  FIG. 6 ) among the twelve selection items is displayed so as to be larger than other selection items. 
     When an operator rotates the rotation controller  3  in the state of the selection screen of  FIG. 6 , the selection of selection item is switched in order every time when the rotation controller  3  is rotated for 30°. 
     For example, when the rotation angle in which the selection item “AAA” is to be selected is set as the basis (“0°”) and when the rotation angle of the rotation controller  3  is at “30°” by an operator rotating the rotation controller  3  for 30° in a clockwise direction, the selection item “BBB” is to be selected as shown in  FIG. 7 . Further, when an operator rotates the rotation controller  3  for 30° again in the clockwise direction from the rotation angle of “30°” so that the rotation angle of the rotation controller  3  is at “60°”, the selection item “CCC” is to be selected as shown in  FIG. 8 . Furthermore, when an operator rotates the rotation controller  3  for 30° again in the clockwise direction from the rotation angle of “60°” so that the rotation angle of the rotation controller  3  is at “90°”, the selection item “DDD” is to be selected as shown in  FIG. 9 . 
     In such way, in the selection screen of  FIG. 6 , the selection item to be selected is to be switched in such way as “AAA”→“BBB”→“CCC”→“DDD”→ . . . →“LLL”→“AAA”→ . . . every time an operator rotates the rotation controller  3  for 30° in the clockwise direction. Further, the selection item to be selected is to be switched in such way as “AAA”→“LLL”→“KKK”→“JJJ”→“BBB”→“AAA”→ . . . every time an operator rotates the rotation controller  3  for 30° in a counter clockwise direction. 
     Moreover, when an operator rotates the rotation controller  3  in the clockwise direction or in the counter clockwise direction while holding the operation surface P of the rotation controller  3  with a fingertip, the ultrasonic motor  8  is driven by the control of the main control unit  24  to apply rotary force to the rotation controller  3 . 
     In the control of applying rotary force to the rotation controller  3 , the main control unit  24  gives a predetermined tactile feeling to an operator according to the screen display by executing the control of applying rotary force in the normal rotation direction to the rotation controller  3  or the control of applying rotary force in the reverse rotation direction to the rotation controller  3  according to the screen display of the selection screen displayed in the display screen  23   a.    
     In particular, in a case where the selection item which is the destination to be switched to is positioned at a position lower than the original selection item in the selection screen, a cyclical rotary force in the same direction as the rotation direction of the rotation controller  3  is applied to the rotation controller  3 . 
     That is, in a case where the selection item which is the destination to be switched to is positioned at a position lower than the original selection item and where an operator rotates the rotation controller  3  in the clockwise direction, rotary force in the normal rotation direction is applied to the rotation controller  3 . Further, in a case where the selection item which is the destination to be switched to is positioned at a position lower than the original selection item and where an operator rotates the rotation controller  3  in the counter clockwise direction, rotary force in the reverse rotation direction is applied to the rotation controller  3 . 
     In such way, when the direction of selection switching is downward in the selection screen, rotary force is generated cyclically in the rotation controller  3  in the same direction as the rotation direction of the rotation controller  3 . Thereby, the rotation controller  3  rotates smoothly and a smooth tactile feeling and a slippery tactile feeling can be given to a fingertip of an operator. 
     For example, in a case where the selection item positioned in the right half of the ring displayed in the selection screen of  FIG. 6  is to be selected by rotating the rotation controller  3  in the clockwise direction, the selection of selection item is switched in order of “AAA”→“BBB”→“CCC”→“DDD”→“EEE”→“FFF” (see  FIGS. 6 to 9 ) and also, the rotary force (that is, rotary force in normal rotation direction) in the same direction as the rotation of the rotation controller  3  is applied to the rotation controller  3 . 
     Further, for example, in a case where the selection item positioned in the left half of the ring displayed in the selection screen of the  FIG. 6  is to be selected by rotating the rotation controller  3  in the counter clockwise direction, the selection of selection item is switched in order of “AAA”→“JJJ”→“III”→“HHH”→“GGG”→“FFF” and also, the rotary force (that is, rotary force in reverse rotation direction) in the same direction as the rotation of the rotation controller  3  is applied to the rotation controller  3 . 
     In such way, a slippery tactile feeling and a smooth tactile feeling can be given to a fingertip of an operator and an operator can sense the feeling of sliding down a slope or skating on ice in accordance with the screen display. 
     Moreover, in a case where the selection item which is the destination to be switched to is positioned at a position upper than the original selection item in the selection screen, the cyclical rotary force in the opposite direction of the rotation direction of the rotation controller  3  is applied to the rotation controller  3 . 
     That is, in a case where the selection item which is the destination to be switched to is positioned at a position upper than the original selection item and where an operator rotates the rotation controller  3  in the counter clockwise direction, rotary force in the reserve rotation direction is applied to the rotation controller  3 . Further, in a case where the selection item which is the destination to be switched to is positioned at a position upper than the original selection item and where an operator rotates the rotation controller  3  in the clockwise direction, rotary force in the normal rotation direction is applied to the rotation controller  3 . 
     In such way, when the direction of selection switching in the selection screen is upward, rotary force is generated cyclically in the opposite direction of the rotation direction of the rotation controller  3  in the rotation controller  3 . Thereby, a force which inhibits the rotation of the rotation controller  3  is applied and a rough tactile feeling and a bumpy tactile feeling can be given to a fingertip of an operator. 
     For example, in a case where the selection item in the left half of the ring displayed in the selection screen of  FIG. 6  is to be selected by rotating the rotation controller  3  in the clockwise direction, the selection of selection item is switched in order of “FFF”→“GGG”→“HHH”→“III”→“JJJ”→“AAA” and also, rotary force (that is, rotary force in reverse rotation direction) in opposite direction of the rotation of the rotation controller  3  is applied to the rotation controller  3 . 
     Moreover, for example, in a case where the selection item in the right half of the ring displayed in the selection screen of  FIG. 6  is to be selected by rotating the rotation controller  3  in the counter clockwise direction, the selection of selection item is switched in order of “FFF”→“EEE”→“DDD”→“CCC”→“BBB”→“AAA” and also, the rotary force (that is, rotary force in normal rotation direction) in the opposite direction of the rotation of the rotation controller  3  is applied to the rotation controller  3 . 
     In such way, a rough tactile feeling and a bumpy tactile feeling can be given to a fingertip of an operator and an operator can sense the feeling of climbing up a slope or going through a pebbled path in accordance with the screen display. 
     As described above, direction of the rotary force to be applied to the rotation controller  3  is automatically switched according to the selection switching direction (downward/upward) in the screen display regardless of whether an operator rotates the rotation controller  3  in the clockwise direction or in the counter clockwise direction. Thereby, a tactile feeling matching the screen display can be always given to an operator without being conscious about the direction in which an operator rotates the rotation controller  3 . 
     Moreover, by changing the speed of rotating operation of the rotation controller  3 , an operator can adjust the cycle of rotary force to be applied to the rotation controller  3  by the drive of the ultrasonic motor  8 . 
     For example, when an operator increases the rotation speed of the rotation controller  3 , in reply, the main control unit  24  determines that the rotation speed of the rotation controller  3  is increased based on the detection signal outputted from the rotation detection unit  7  and the main control unit  24  controls the ultrasonic motor  8  to apply rotary force of shorter cycle to the rotation controller  3 . 
     Further, for example, when an operator decreases the rotation speed of the rotation controller  3 , in replay, the main control unit  24  determines that the rotation speed of the rotation controller  3  is decreased based on the detection signal outputted from the rotation detection unit  7  and the main control unit  24  controls the ultrasonic motor  8  to apply rotary force of longer cycle to the rotation controller  3 . 
     In such way, by an operator changing the speed to rotate the rotation controller  3 , the cycle of the rotary force to be applied to the rotation controller  3  is changed and the tactile feeling of the rotation controller  3  can be changed. 
     Here, it can be structures so that intensity of the rotary force to be applied to the rotation controller  3  is changed according to the speed of the rotating operation of the rotation controller  3 . 
     Further, by changing the pressure to the rotation controller  3 , an operator can adjust intensity of the rotary force to be applied to the rotation controller  3  by the drive of the ultrasonic motor  8 . 
     For example, when an operator pushes the rotation controller  3  with a greater force, in replay, the main control unit  24  determines that intensity of the pressure in the axis direction to the rotation controller  3  is increased based on the detection signal outputted from each of the pressure sensitive sensors  9   a  to  9   d  and the main control unit  24  controls the ultrasonic motor  8  to rotate the rotation controller  3  with a greater rotary force. 
     Moreover, for example, when an operator pushes the rotation controller  3  with a smaller force, in replay, the main control unit  24  determines that intensity of the pressure in the axis direction to the rotation controller  3  is decreased based on the detection signal outputted from each of the pressure sensitive sensors  9   a  to  9   d  and the main control unit  24  controls the ultrasonic motor  8  to rotate the rotation controller  3  with a smaller rotary force. 
     In such way, by an operator changing the pressure to push the rotation controller  3 , intensity of the rotary force to be applied to the rotation controller  3  is changed and the tactile feeling of the rotation controller  3  can be changed. 
     Here, it can be structured so as to change the cycle of the rotary force to be applied to the rotation controller  3  according to intensity of the pressure in the axis direction to the rotation controller  3 . 
     Moreover, after selecting the targeted selection item by the rotating operation of the rotation controller  3 , an operator can decide the selection by pushing the rotation controller with a predetermined pressure. 
     For example, when an operator pushes the rotation controller  3  with a predetermined pressure needed for deciding the selection in a state of the selection screen of  FIG. 6 , in replay, the main control unit  24  determines that the selection of the selection item in the selection screen is decided based on the detection signal outputted from each of the pressure sensitive sensors  9   a  to  9   d  and the main control unit  24  executes the process according to the decided selection item. 
     That is, for example, when the selection item “BBB” is in the selected state as shown in the selection screen of  FIG. 7  and when an operator pushes the rotation controller  3  with the pressure needed for deciding the selection, the selection of the selection item “BBB” is to be decided and the process according to the selection item “BBB” in which the selection is decided is to be executed. 
     According to the above described mobile phone  100  of the first embodiment, there is included the rotation controller  3  which receives the rotating operation of an operator so as to rotate around the axis, the rotation detection device (rotation detection unit  7 , rotation detection program  243   a , main CPU  241 ) for detecting the rotation speed and/or the rotation direction of the rotation controller  3 , the pressure detection device (pressure sensitive sensors  9   a  to  9   d , pressure detection program  243   b , main CPU  241 ) for detecting intensity of the pressure in the axis direction to the rotation controller  3  and the rotation drive device (ultrasonic motor  8 ) for applying rotary force to the rotation controller  3 . When a rotation of the rotation controller  3  is detected by the rotation detection device (rotation detection unit  7 , rotation detection program  243   a , main CPU  241 ), a predetermined tactile feeling is given to an operator via the rotation controller  3  by the rotation control device (rotation control program  243   c , main CPU  241 ) by the rotation drive device (ultrasonic motor  8 ) executing at least one of the applying of rotary force in the normal rotation direction to the rotation controller  3  or the applying of rotary force in the reverse rotation direction to the rotation controller  3  in conjunction with the screen display in the display screen  23   a  of the display unit  23  to apply rotary force to the rotation controller  3 . 
     That is, when an operator carries out a rotating operation to the rotation controller, a predetermined tactile feeling is given to an operator by the rotation drive device applying at least one of the rotary force in the normal rotation direction or the rotary force in the reverse rotation direction to the rotation controller in conjunction with the display screen in the display unit. Therefore, in an electronic device which includes the feeling applicator, various types of operational feelings in conjunction with the screen display in the display unit can be given to an operator. 
     Further, the rotation control device (rotation control program  243   a , main CPU  241 ) changes the rotary force to be applied to the rotation controller  3  according to the rotation speed and/or the rotation direction of the rotation controller  3  which are detected by the rotation detection device (rotation detection unit  7 , rotation detection program  243   a , main CPU  241 ) and intensity of the pressure detected by the pressure detection device (pressure sensitive sensors  9   a  to  9   d , pressure detection program  243   b , main CPU  241 ). 
     That is, by changing the speed to rotate the rotation controller, the direction to rotate the rotation controller and the pressure to push the rotation controller, an operator can change the rotary force to be applied to the rotation controller by the drive of the rotation drive device. 
     Here, in the above described first embodiment, the optical rotation detection unit  7  formed of the ring shaped code wheel  71  and the photo interrupter  72  is exemplified as the rotation detection device for detecting the rotation angle of the rotation controller  3 . However, the rotation detection unit  7  is an example of the rotation detection device, and any structure may be applied as long as the rotation angle of the rotation controller  3  can be detected. For example, a mechanical type (contact type) rotation detection device, a magnetic type rotation detection device, an electrostatic type rotation detection device in which position detection is carried out by capacitance change of an electrode or the like can be applied. Further, an absolute type rotary encoder which can detect the absolute position in addition to the amount of rotation and the rotation direction of the rotation controller  3  may be applied. 
     Moreover, in the above first embodiment, the description is given for the case where four pressure sensitive sensors are disposed at the back side of the PCB substrate. However, the layout position of the pressure sensitive sensors is not limited to this, and the pressure sensitive sensors may be disposed at any position as long as the pressure in the axis direction to the rotation controller  3  can be detected. Further, the number of the pressure sensitive sensors is not limited to four as long as the number the pressure sensitive sensors is one or more. Furthermore, the pressure sensitive sensors are not limited to the sensors which detect intensity of the pressure, and sensors such as tact switches which can detect whether a pressure of more than or equal to a predetermined value is applied or not may be used. 
     Second Embodiment 
     Next, a mobile phone of the second embodiment in which the present invention is applied will be described. Here, same symbols are used for the structures which are similar to that of the mobile phone  100  of the first embodiment and the descriptions are omitted. Descriptions are given only for the portions which are different from the mobile phone of the first embodiment. 
     As shown in  FIGS. 10 and 11 , the mobile phone  200  of the second embodiment includes a feeling applicator  25  for an operator to carry out an input operation and a mobile phone unit  26  which is connected with the feeling applicator  25  and which is operated by the feeling applicator  25 . 
     First, the feeling applicator  25  according to the second embodiment will be described. 
     As shown in  FIGS. 10 to 13 , the feeling applicator  25  includes an operation board  27  for an operator to carry out an operation and a support base  28  which is provided at the lower side of the operation board  27 , and an ultrasonic motor (feeling applying device)  8   a  for applying a tactile feeling to the operation board  27 , a control unit  10  for controlling each part of the feeling applicator  25 , an input/output unit  11  for carrying out sending and receiving of various types of signals with the mobile phone unit  26  and the like are disposed between the operation board  27  and the support base  28 . Further, at the back side  28   a  of the support base  28 , pressure sensitive sensors (detection device)  29   a  to  29   d  for detecting an operation in the operation board  27  are disposed. 
     The operation board  27  is formed in an approximately disk shape, and the operation board  27  forms the upper surface of the feeling applicator  25  by being provided at the upper side of the support base  28 . The upper surface unit  271  of the operation board  27  is the operation surface P in which an operator carries out an operation and an operator carries out an input operation to the mobile phone unit  26  by putting a fingertip on the operation surface P of the operation board  27  and by moving the fingertip on the operation surface P along the circumference direction so as to draw circles. 
     The operation board  27  is formed of a soft material such as high polymer polyethylene, for example, and in time of input operation, the operation board  27  deflects downward according to the pressure of an operator pushing the operation board  27  and a vibration from the ultrasonic motor  8   a  and a force in the opposite direction of the progressive wave which is generated by the vibration are transmitted. 
     The support base  28  includes a pedestal  281  in an approximately disk shape which has approximately the same diameter as the operation board  27 , a projection unit  282  having approximately C shape in a planar view which is disposed so as to project on the upper surface of the pedestal  281 , a cylinder unit  283  in approximately cylinder shape which is provided at the center position of the pedestal  281  and a concave unit  284  in an approximately ring shape which is formed between the projection unit  282  and the cylinder unit  283 . The support base  28  forms the bottom surface of the feeling applicator  25  by being provided at the lower side of the operation board  27 . 
     Moreover, at the back side  28   a  of the support base  28 , four contact units  285  are disposed so as to project downward at the positions corresponding to each of the pressure sensitive sensors  29   a  to  29   d  which are disposed in the back side  28   a  side of the support base  28 . When the operation board  27  is pushed, the lower surfaces of the contact sections  285  are to contact the upper surfaces of the pressure sensitive sensors  29   a  to  29   d , respectively. 
     The ultrasonic motor  8   a  includes piezoelectric elements  81 , a ring shaped stator  82  and the like, and the ultrasonic motor  8   a  applies a tactile feeling to the operation board  27  by being driven by the control of the control unit  10 . 
     The stator  82  is disposed in the approximately ring shaped concave unit  284  which is formed at the upper surface of the support base  28  and is fixed to the support base  28  by the double-faced tape  84  in a flat circular ring shape. At the upper portion of the stator  82 , a plurality of convex units  821  are disposed along the circumference direction and further, a plurality of piezoelectric elements  81  for generating a vibration energy according to the application of electric voltage are disposed along the circumference direction of the stator  82 . The convex units  821  which are formed on the upper surface of the stator  82  are provided so as to contact the back side  272  of the operation plate  27 , and the convex units  821  transmit the progressive wave which is generated by the vibration of the stator  82  to the operation board  27 . The stator  82  is connected with the control unit  10  by the FPC substrate  86  which is disposed so as to go through the cutout  282   a  formed in the projection unit  282  and a tactile feeling according to the drive signal outputted from the control unit  10  is given. 
     Further, when the drive voltage based on the drive signal is applied to the piezoelectric elements  81  from the control unit  10 , the entire stator  82  vibrates based on the ultrasonic vibration of the piezoelectric elements  81  and the vibration (tactile feeling) by the progressive wave which is generated by the vibration of the stator  82  is transmitted to the operation board  27 . Furthermore, by controlling the drive frequency of the drive signal which is to be applied to the piezoelectric elements  81 , intensity and direction of the vibration to be given to the operation board  27  by the ultrasonic vibration of the piezoelectric elements  81  can be set freely. 
     Further, when the vibration is applied to the operation board  27  by the drive of the ultrasonic motor  8   a , a predetermined tactile feeling is given to a fingertip of an operator which is placed on the upper surface unit  271  (operation surface P) of the operation board  27 . Furthermore, because the operation board  27  is formed of a soft material as described above, the vibration applied by the ultrasonic motor  8   a  can be easily transmitted and the tactile feeling by the drive of the ultrasonic motor  8   a  can be given to the fingertip of an operator more clearly. 
     The double-faced tape  84  is formed of a gel material such as acrylic foam or a rubber material, for example, and the double-faced tape  84  realizes a function as a damper which absorbs noise which occurs when the stator  82  is driven. 
     The pressure sensitive sensors  29   a  to  29   d  are disposed at the back side  28   a  of the support base  28  in the circumference direction by having a space of 90° therebetween. Each of the pressure sensitive sensors  20   a  to  20   d  are connected to the control unit  10 , and the pressure sensitive sensors  20   a  to  20   d  detects intensity of the pressure in the axis direction applied to the operation board  27  via the contact units  285  which are disposed at the back side  28   a  of the support base  28  by an operation of an operator and output the detected intensity of the pressure to the main control unit  3  via the control unit  10 . 
     As for the pressure sensitive sensors  29   a  to  29   d , pressure sensitive sensors of a resistive film type, a diffusion type, a film formation type, an electric capacity type, a mechanical type or the like can be used, for example. 
     Next, a mobile phone unit  26  according to the second embodiment will be described. 
     As shown in  FIG. 2 , the mobile phone unit  26  includes an antenna (omitted from the drawing), a communication unit  21  for sending and receiving wireless signals with an external device, a speaker and a microphone (both omitted from the drawing), a conversation communication unit  22  for carrying out input/output of sound, a display screen  23   a , a display unit  23  for displaying various types of screens in the display screen  23   a  and a main control unit  30  for integrally controlling the entire mobile phone  200 . 
     The main control unit  30  includes a main CPU (Central Processing Unit)  301 , a RAM (Random Access Memory)  242 , a ROM (Read Only Memory)  302  and the like, and the main control unit  30  is connected with the control unit  10 . The main control unit  30  controls each part of the mobile phone unit  26  based on an input operation signal which is transmitted from the feeling applicator  25 . 
     The main CPU  301  reads out the process programs and the like stored in the ROM  302  and expands the process programs in the RAM  242  and executes the process programs according to the input signal inputted form each part of the mobile phone unit  26  and the feeling applicator  25 , and the main CPU  301  controls the entire mobile phone  200  by outputting a control signal to each part. 
     The ROM  302  stores the process programs, data and the like in advance, and for example, the ROM  302  stores an operation detection program  302   a , a drive control program  302   b  and the like. 
     The operation detection program  302   a  is a program to make the main CPU  301  realize a function to detect an operation of an operator to the operation board  27 . In the embodiment, the operation detection device is structured with the operation detection program  302   a , the main CPU  301  and the pressure sensitive sensors  29   a  to  29   d.    
     The drive control program  302   b  is a program to make the main CPU  301  realize a function to give a predetermined tactile feeling to an operator via the operation board  27  by applying a tactile feeling to the operation board  27  by the ultrasonic motor (feeling application device)  8   a  in conjunction with the screen display is the display screen  23   a  of the display unit  23  when the operation of an operator to the operation board  27  is detected in the execution of the operation detection program  302   a . In the embodiment, the drive control device is structured with the drive control program  302   b  and the main CPU  301 . 
     Further, in the embodiment, the feeling applicator  25  of the present invention is structured with the above mentioned ultrasonic motor  8   a , pressure sensitive sensors  29   a  to  29   d , control unit  10 , input/output unit  11  and main control unit  30 . 
     Here, a rotation drive process which is carried out by the execution of the operation detection program  302   a  and the drive control program  302   b  will be described and also, a specific description will be given for an operation of the mobile phone  200  of the embodiment. 
     When the selection screen in which a plurality of selection items are displayed is displayed in the display screen  23   a  which is provided in the mobile phone unit  26 , an operator selects the targeted selection item among the selection items displayed in the selection screen by putting a fingertip on the operation surface P of the operation board  27  and by moving the fingertip on the operation surface P in the circumference direction so as to draw circles. Further, after selecting the targeted selection item by the operation on the operation screen P, an operator carries out an input operation to the mobile phone unit  26  by carrying out a deciding operation to decide on the selected selection item. 
     Here, when the operation is carried out on the operation screen P, the pressure detection signal which indicates the pressure to the operation board  27  is outputted from each of the pressure sensitive sensors  29   a  to  29   d  provided in the back side  28   a  side of the support base  28  to the main control unit  30  via the control unit  10  and the input/output unit  11 . Further, in the main control unit  30 , exist/not-exist of an operation in the operation board  27  is monitored based on the signal input from each of the pressure sensitive sensors  29   a  to  29   d , and the main control unit  30  determines that the operation is carried out in the operation board  27  when the pressure detection signals indicating the pressure which are detected by the operation in the operation board  27  is inputted from the pressure sensitive sensors  29   a  to  29   d . Thereafter, the main control unit  30  outputs the drive signal to the ultrasonic motor  8   a  to drive the ultrasonic motor  8   a  and applies a tactile feeling (vibration) to the operation board  27  so as to give a predetermined tactile feeling to an operator who operates the operation board  27 . 
     Moreover, in time of driving of the ultrasonic motor  8   a , the main control unit  30  carries out a predetermined arithmetic process to specify direction (clockwise direction/counter clockwise direction) of the operation in the operation surface P, speed (speed that a fingertip of an operator moves on the operation surface P) of the operation in the operation surface P and pressure in the axis direction to the operation board  27  based on the pressure detection signal outputted from each of the four pressure sensitive sensors  29   a  to  29   d  which are disposed in the back side  28   a  side of the support base  28 . Further, the main control unit  30  changes the tactile feeling (vibration) to be applied to the operation board  27  based on the direction (clockwise direction/counter clockwise direction) of the operation, the speed of the operation and the pressure in the axis direction to the operation board  27  which are specified. 
     In particular, the main control unit  30  controls so as to apply a tactile feeling (vibration) in the same direction as the direction of operation or to apply a tactile feeling (vibration) in the opposite direction of the direction of operation in conjunction with the screen display in the display screen  23   a  according to the direction of operation in the operation surface P which is specified based on the pressure detection signals form the pressure sensitive sensors  29   a  to  29   d . Further, the main control unit  30  controls so as to apply vibration in shorter cycle to the operation board  27  as the speed of the operation in the operation surface P becomes faster according to the speed of the operation in the operation surface P which is specified based on the pressure detection signals from the pressure sensitive sensors  29   a  to  29   d . Furthermore, the main control unit  30  controls so as to apply greater tactile feeling (vibration) to the operation board  27  as the pressure to the operation board  27  in the axis direction becomes greater according to the pressure in the axis direction to the operation board  27  which is specified based on the pressure detection signals from the pressure sensitive sensors  29   a  to  29   d.    
     Moreover, the main control unit  30  executes a predetermined arithmetic process to specify an operation position (that is, position of a fingertip of an operator) in the operation surface P based on the pressure detection signal outputted from each of the four pressure sensitive sensors  29   a  to  29   d . Further, the main control unit  30  monitors whether the specified operation position in the operation surface P is at the selection angle corresponding to the selection item which can be selected in the selection screen or not. When the operation position in the operation screen P is at the selection angle corresponding to the selection item which can be selected in the selection screen, the main control unit  30  generates a switching signal to switch the selection of selection item in the selection screen and executes a display control to switch the selection of selection item in the selection screen which is displayed in the display screen  23   a  by outputting the generated switching signal to the display unit  23 . 
     In such way, in the embodiment, by an operator carrying out an operation of moving his or her fingertip along the circumference direction of the operation board  27  on the operation surface P of the feeling applicator  25 , the selection items which are displayed in the display screen  23   a  can be selected and the tactile feeling (vibration) by the drive of the ultrasonic motor  8   a  can be applied to the operation board  27  in conjunction with the operation on the operation surface P. Further, by changing the direction of operation on the operation surface P, the speed of operation on the operation surface P and the pressure to the operation board  27 , the direction, cycle and intensity of the tactile feeling (vibration) to be applied to the operation board  27  by the ultrasonic motor  8   a  can be changed. 
     Here, a specific example of the selection process of the selection item and the feeling application process to the operation board  27  will be described by using  FIG. 6  similarly to the first embodiment. 
       FIG. 6  is an example of the selection screen which is displayed in the display screen  23   a  of the display unit  23 . In the selection screen of  FIG. 6 , twelve selection items are displayed so as to be arranged in a ring shape by having equal spaces therebetween. Further, the selection item (selection item “AAA” in  FIG. 6 ) which is selected among the twelve selection items is to be displayed so as to be larger than other selection items. 
     Moreover, in the selection screen of  FIG. 6 , when an operator slides his or her fingertip on the operation surface P along the circumference direction so as to draw circles, selection of selection item is switched in order according to the operation position in the selection screen. 
     At this time, the ultrasonic motor  8   a  is driven by the control of the main control unit  30 , and a tactile feeling is applied to the operation board  27 . In time of application of a tactile feeling to the operation board  27 , the main control unit  30  executes the control of applying a tactile feeling (vibration) in the normal rotation direction to the operation board  27  or the control of applying a tactile feeling (vibration) in the reverse rotation direction to the operation board  27  by the ultrasonic motor  8   a  according to the screen display in the selection screen which is displayed in the display screen  23   a . Thereby, the main control unit  30  gives a tactile feeling according to the screen display to an operator. 
     In particular, in a case where the selection item which is the destination to be switched to is positioned below than the original selection item in the selection screen, the cyclical tactile feeling (vibration) in the same direction as the direction of operation on the operation surface P is applied to the operation board  27 . 
     That is, in a case where the selection item which is the destination to be switched to is positioned below than the original selection item and where an operator is moving his or her fingertip in the clockwise direction on the operation surface P, a tactile feeling (vibration) in the normal rotation direction is applied to the operation board  27 . Further, in a case where the selection item which is the destination to be switched to is positioned below than the original selection item and where an operator is moving his or her fingertip in the counter clockwise direction on the operation surface P, a tactile feeling (vibration) in the reverse rotation direction is applied to the operation board  27 . 
     In such way, when the selection switching direction in the selection screen is downward, a layer of air is formed between a fingertip of an operator and the operation board  27  to give a slippery tactile feeling and a smooth tactile feeling to the fingertip of an operator by vibrating the operation board  27  by the ultrasonic wave in the same direction as the direction of operation on the operation surface P. Thereby, a sense of tracing something slippery can be given to an operator. 
     Moreover, in a case where the selection item which is the destination to be switched to is positioned upper than the original selection item in the selection screen, a cyclical tactile feeling (vibration) in the opposite direction of the direction of operation on the operation surface P is applied to the operation board  27 . 
     That is, in a case where the selection item which is the destination to be switched to is upper than the original selection item and where an operator is moving his or her fingertip on the operation surface P in the counter clockwise direction, a tactile feeling (vibration) in the reverse rotation direction is applied to the operation board  27 . Further, in a case where the selection item which is the destination to be switched to is upper than the original selection item and where an operator is moving his or her fingertip on the operation surface P in the clockwise direction, a tactile feeling (vibration) in the normal rotation is applied to the operation board  27 . 
     In such way, when the selection switching direction in the selection screen is upward, a continuous vibration is generated by the ultrasonic wave to the operation board  27  in the opposite direction of the direction of operation on the operation surface P. Thereby, a rough tactile feeling and a bumpy tactile feeling can be given to a fingertip of an operator. 
     In such way, even when an operator moves his or her fingertip in either of the clockwise direction and the counter clockwise direction, the direction of the tactile feeling (vibration) to be applied to the operation board  27  is automatically switched according to the direction (upward direction/downward direction) of the selection switching in the screen display. Therefore, the tactile feeling which matches to the screen display can be always given to an operator without being conscious about the direction (direction of operation) in which an operator moves his or her fingertip. 
     Moreover, by changing the speed of operation on the operation surface P, an operator can adjust the cycle of the tactile feeling (vibration) to be applied to the operation board  27  by the drive of the ultrasonic motor  8   a.    
     For example, when an operator increases the speed of operation on the operation surface P, in replay, the main control unit  30  determines that the operation speed is increased based on the pressure detection signal outputted from each of the pressure sensitive sensors  29   a  to  29   d  and the main control unit  30  controls the ultrasonic motor  8   a  so as to apply a tactile feeling (vibration) in shorter cycle to the operation board  27 . 
     Further, for example, when an operator decreases the speed of operation on the operation surface P, in replay, the main control unit  30  determines that the operation speed is decreased based on the pressure detection signal outputted from each of the pressure sensitive sensors  29   a  to  29   d  and the main control unit  30  controls the ultrasonic motor  8   a  so as to apply a tactile feeling (vibration) in longer cycle to the operation board  27 . 
     In such way, by an operator changing the speed of sliding his of her fingertip on the operation surface P, cycle of the tactile feeling (vibration) to be applied to the operation board  27  is changed and the tactile feeling of the operation surface P can be changed. 
     Here, it can be structured so as to change intensity of the vibration to the applied to the operation board  27  according to the speed of operation on the operation surface P. 
     Further, by changing the pressure to the operation board  27 , an operator can adjust intensity of the tactile feeling (vibration) to be applied to the operation board  27  by the drive of the ultrasonic motor  8   a.    
     For example, when an operator pushes the operation board  27  with a greater force, in replay, the main control unit  30  determines that the pressure in the axis direction to the operation board  27  is increased based on the detection signal outputted from each of the pressure sensitive sensors  29   a  to  29   d  and the main control unit  30  controls the ultrasonic motor  8   a  so as to apply a great tactile feeling to the operation board  27 . 
     Further, for example, when an operator pushes the operation board  27  with a smaller force, in replay, the main control unit  30  determines that the pressure in the axis direction to the operation board  27  is reduced based on the detection signal outputted from each of the pressure sensitive sensors  29   a  to  29   d  and the main control unit  30  controls the ultrasonic motor  8   a  so as to apply a smaller tactile feeling (vibration) to the operation board  27 . 
     In such way, by an operator changing the force to push the operation board  27 , intensity of the tactile feeling (vibration) to be applied to the operation board  27  is changed and the tactile feeling of the operation surface P can be changed. 
     Here, it can be structured so as to change the cycle of the tactile feeling (vibration) to be applied to the operation board  27  according to intensity of the pressure in the axis direction to the operation board  27 . 
     Moreover, after selecting the targeted selection item by the operation on the operation surface P, an operator can decide the selection by pushing the operation board  27  at a predetermined pressure. 
     For example, when an operator pushes the operation board  27  at a predetermined pressure needed for deciding the selection in the state of the selection screen of  FIG. 6 , in replay, the main control unit  30  determines that the selection of the selection item in the selection screen is decided based on the detection signal outputted from each of the pressure sensitive sensors  29   a  to  29   d  and the main control unit  30  executes the process according to the decided selection item. 
     According to the above described mobile phone  200  of the second embodiment, there is included the operation board  27  formed of a soft material, the feeling application device (ultrasonic motor  8   a ) for applying the tactile feeling to the operation board  27  and the detection device (operation detection program  302   a , main CPU  301 , pressure sensitive sensors  29   a  to  29   d ) for detecting an operation by an operator to the operation board  27 . Further, by applying a tactile feeling to the operation board  27  by the feeling application device (ultrasonic motor  8   a ) in conjunction with the screen display in the display screen  23   a  of the display unit  23  when an operation of an operator to the operation board  27  is detected by the detection device, a predetermined tactile feeling is given to an operator via the operation board  27  by the drive control device (drive control program  302   a , main CPU  301 ). 
     That is, when an operation of an operator is carried out in the operation board, a tactile feeling is applied to the operation board by the feeling application device in conjunction with the display screen of the display unit and a predetermined tactile feeling is given to an operator. Therefore, in an electronic device in which the feeling applicator is included, various types of operational feelings in conjunction with the screen display in the display unit can be given to an operator. 
     Here, in the above second embodiment, the case where four pressure sensitive sensors  29   a  to  29   d  are disposed in the back side  28   a  side of the support base  28  is described. However, the layout position of the pressure sensitive sensors  29   a  to  29   d  is not limited to this. The pressure sensitive sensors  29   a  to  29   d  may be disposed at any positions as long as the operation position in the operation board  27 , the pressure in the axis direction to the operation board  27  or the like can be detected. Further, the number of the pressure sensitive sensors  29   a  to  29   d  is not limited to four, and the number of the pressure sensitive sensors may be any number as long as the number of the pressure sensitive sensors is three or more. Furthermore, the pressure sensitive sensors  29   a  to  29   d  are not limited to sensors for detecting intensity of pressure, and a sensor such as a tact switch which can detect whether a pressure of more than or equal to a predetermined value is applied or not may be used. 
     Here, the scope of the present invention is not limited to the above described each embodiment. Various modifications and changes in design can be carried out within the scope of the present invention. 
     For example, in the above embodiment, a mobile phone is exemplified as an electronic device in which the feeling applicator according to the present invention is included. However, the feeling applicator of the present invention can be applied to any electronic device as long as input operation by the feeling applicator can be carried out, not being limited to the mobile phone. For example, the feeling applicator of the present invention can be applied to other portable terminal devices such as a portable audio player, a PDA (Personal Digital Assistance) and the like, an AV devices such as a television receiver and the like, a personal computer and the like. Further, the feeling applicator may be incorporated in an electric device in advance. Furthermore, the feeling applicator may be used as a stand-alone external device by being connected with an electronic device. 
     Moreover, in the above embodiment, an ultrasonic motor is exemplified as a rotation drive device and a feeling application device. However, an ultrasonic motor is an example of a rotation drive device and an feeling application device, and any structure may be used as long as rotary force can be applied to the rotation controller or the operation board. For example, an electrostatic actuator which is driven by using attraction and repulsion of electrostatic charges as power, an electromagnetic actuator which is driven by using the force by an interaction between a magnetic field and electric power, structures using a magnetostriction actuator, a hydraulic cylinder, an air cylinder and the like may be used. Further, as a drive control in the rotation drive device and the feeling application device, a control in which power of an actuator is transmitted to the device to be driven such as the rotation controller and the like as it is may be applied. Also, a stepping motor which operates in proportion to the drive pulse number or the like may be applied. Furthermore, the actuator may be driven by rotating the device to be driven, or a linear actuator which is driven by moving the device to be drive linearly may be applied. 
     Moreover, the combination of rotary force to be applied to the rotation controller  3  is not limited to the specific examples exemplified in the embodiments. A rotary force in the normal rotation direction and a rotary force in the reverse rotation direction can be combined freely and can be applied. 
     Further, in the above embodiment, the description is given for the case where the direction of rotary force to be applied to the rotation controller  3  and the operation board  27  is automatically switched according to the direction of the operation by an operation in the rotation controller  3  and the operation board  27 . However, it may be structured so that the direction in which rotary force is applied is not switched according to the direction of the operation. 
     According to a first aspect of the preferred embodiments of the present invention, there is provided a feeling applicator including a rotation controller for receiving a rotating operation of an operator so as to rotate around an axis, a rotation detection unit for detecting a rotation of the rotation controller, a rotation drive unit for applying a rotary force to the rotation controller and a rotation control unit for applying a predetermined tactile feeling to the operator via the rotation controller by applying the rotary force to the rotation controller by executing at least one of an application of the rotary force in a normal rotation direction or an application of the rotary force in a reverse rotation direction to the rotation controller by the rotation drive unit in conjunction with a screen display in a display screen of a display unit when the rotation of the rotation controller is detected by the rotation detection unit. 
     Preferably, the rotation detection unit detects a rotation speed and/or a rotation direction of the rotation controller, and the rotation control unit changes the rotary force to be applied to the rotation controller according to the rotation speed and/or the rotation direction of the rotation controller detected by the rotation detection unit. 
     Preferably, the feeling applicator further includes a pressure detection unit for detecting an intensity of a pressure in an axis direction to the rotation controller, and the rotation control unit changes the rotary force to be applied to the rotation controller according to the intensity of the pressure detected by the pressure detection unit. 
     According to a second aspect of the preferred embodiments of the present invention, there is provided a feeling applicator including an operation board formed of a soft material, a feeling applicator for applying a tactile feeling to the operation board, a detection unit for detecting an operation of an operator to the operation board and a drive control unit for applying a predetermined tactile feeling to the operator via the operation board by applying the tactile feeling to the operation board by the feeling applicator in conjunction with a screen display in a display screen of a display unit when the operation of the operator to the operation board is detected by the detection unit. 
     According to a third aspect of the preferred embodiments of the present invention, there is provided an electronic device including the feeling applicator and the display unit. 
     According to a fourth aspect of the preferred embodiments of the present invention, there is provided an electronic device including a display unit, a rotation controller for receiving a rotating operation of an operator so as to rotate around an axis, a rotation detection unit for detecting a rotation speed and/or a rotation direction of the rotation controller, a pressure detection unit for detecting an intensity of a pressure in an axis direction to the rotation controller, a rotation drive unit for applying a rotary force to the rotation controller and a rotation control unit for applying a predetermined tactile feeling to an operator via the rotation controller by applying the rotary force to the rotation controller by executing at least one of an application of the rotary force in a normal rotation direction or an application of the rotary force in a reverse rotation direction to the rotation controller by the rotation drive unit in conjunction with a screen display in a display screen of a display unit when a rotation of the rotation controller is detected by the rotation detection unit, and the rotation control unit changes the rotary force to be applied to the rotation controller according to the rotation speed and/or the rotation direction of the rotation controller detected by the rotation detection unit and the intensity of the pressure detected by the pressure detection unit. 
     According to a fifth aspect of the preferred embodiments of the present invention, there is provided an electric device including a display unit, an operation board formed of a soft material, a feeling application unit for applying a tactile feeling to the operation board, a detection unit for detection an operation of an operator to the operation board and a drive control unit for applying a predetermined tactile feeling to the operator via the operation board by applying the tactile feeling to the operation board by the feeling application unit in conjunction with a screen display in a display screen of the display unit when the operation of the operator to the operation board is detected by the detection unit. 
     The entire disclosure of Japanese Patent Application No. 2009-114258 filed on May 11, 2009 including description, claims, drawings, and abstract are incorporated herein by reference in its entirety. 
     Although various exemplary embodiments have been shown and described, the invention is not limited to the embodiments shown. Therefore, the scope of the invention is intended to be limited solely by the scope of the claims that follow.