JP2004287359A - Communication terminal device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a communication terminal device in which a plurality of protrusions, that are extended or retracted by the driving force of an ultrasonic motor, is provided, the size is small and many braille data or the like are displayed. <P>SOLUTION: The device is provided with a communication section in which transmission and reception of data are conducted, a conversion section which is used to convert character data received by the communication section into braille data and a braille unit (a braille display section 3) which is provided with a plurality of protrusions that are extended or retracted by the driving force of the ultrasonic motor. The unit (the section 3) provides braille by extending or retracting the protrusions based on the braille data. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a communication terminal device that displays information such as Braille with a plurality of protrusions that can advance or retract by the driving force of an ultrasonic motor.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, portable information terminal devices such as a mobile phone and a PHS capable of displaying Braille are known. In this portable information terminal device, a permanent magnet is connected to a Braille projection as a display member. An electromagnet formed by a core and a coil is arranged on the permanent magnet so as to oppose each other, and applies an attractive force or a repulsive force according to the energized state. When the Braille projection is in the protruding state, the locking member is fitted into the recess of the permanent magnet, and locks the permanent magnet. When the coil is energized and an attractive force is generated in the permanent magnet, the locking member comes off the recess. Then, when the coil is energized so that a repulsive force is generated in the permanent magnet, the Braille projection is pushed up and protrudes from the housing surface, and the locking member is fitted into the recess to lock the permanent magnet. In this manner, the Braille projection for displaying Braille is projected or retracted.
[0003]
[Patent Document 1]
JP-A-2002-156898
[Patent Document 2]
JP 2001-331249 A
[Problems to be solved by the invention]
However, in the portable information terminal device described above, since a permanent magnet, an electromagnet including an iron core and a coil, and the like are used, it is not easy to reduce the size and weight. If the size cannot be reduced, the amount of Braille data that can be displayed at one time in the Braille display area will be reduced, resulting in lack of convenience. Recently, data broadcasting has been performed in digital broadcasting, and there is a demand for miniaturization of an active Braille display, which is a receiving terminal device for visually impaired people. To achieve this, a small-sized, high-output, highly controllable linear actuator (ultrasonic motor) is required.
[0004]
SUMMARY OF THE INVENTION It is an object of the present invention to provide a communication terminal device that is provided with a plurality of protrusions that can be advanced or retracted by the driving force of an ultrasonic motor, is small, and can display a large amount of Braille data and the like.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, the present invention has taken the following measures. That is, the communication terminal device of the present invention includes a communication unit that transmits and receives data, a conversion unit that converts character data received by the communication unit into Braille data, and a plurality of units that can advance or retract by the driving force of the ultrasonic motor. And a Braille unit having the projections described above, wherein the Braille unit is configured to advance or retreat each of the projections based on the Braille data to display Braille.
[0006]
As described above, since each projection in the Braille unit is advanced or retracted by using the driving force of the ultrasonic motor, the advance / retreat mechanism of each projection can be reduced in size, and a large amount of Braille data can be displayed at one time. Become. In addition, since the ultrasonic motor has high controllability, it is possible to accurately represent Braille data. Further, recently, the data transfer rate has been increased, and the amount of data received per unit time tends to increase. However, according to the present invention, the display speed of braille data is increased. It can be displayed. In addition, the ultrasonic motor does not generate magnetism because it uses ultrasonic vibration as a driving source without using a winding or a magnet as a driving source. For this reason, even in a high magnetic field, it operates correctly without being affected by magnetism. Further, since no magnetism is generated, there is no effect on data transmission / reception by wireless communication. Further, since no winding is used, it is possible to adopt a simple configuration, and it is possible to reduce the weight and cost.
[0007]
Further, the communication terminal device of the present invention may further include a data storage unit for storing the received character data or the converted braille data, and the data storage unit for each of the braille data amounts that the braille unit can display at one time. And a controller for reading out Braille data from the controller and outputting the data to the Braille unit.
[0008]
As described above, since the Braille data is read from the data storage unit and output to the Braille unit for each Braille data amount that can be displayed at one time, the Braille data can be displayed in page units. Thereby, the convenience can be improved.
[0009]
Further, the communication terminal device of the present invention includes a communication unit that transmits and receives three-dimensional data including at least information of irregularities, and a Braille unit having a plurality of protrusions that can advance or retreat by a driving force of an ultrasonic motor. The braille unit is characterized in that the three-dimensional data is displayed three-dimensionally by moving each projection forward or backward based on the three-dimensional data.
[0010]
As described above, the configuration is adopted in which each projection in the Braille unit is advanced or retracted by the amount of advance corresponding to the position using the driving force of the ultrasonic motor. Can be displayed. The three-dimensional data includes, for example, map data having contour lines, weather map data having isobars, and the like. Since the three-dimensional data is displayed three-dimensionally, the user can recognize the data by touching each projection and feeling the unevenness. Since this ultrasonic motor has high controllability, it is possible to adjust the amount of protrusion of the projection and accurately express three-dimensional data. Furthermore, the amount of data received per unit time tends to increase due to the recent increase in data transfer speed. However, according to the present invention, since the display speed of three-dimensional data increases, three-dimensional Data can be displayed. In addition, the ultrasonic motor does not generate magnetism because it uses ultrasonic vibration as a driving source without using a winding or a magnet as a driving source. For this reason, even in a high magnetic field, it operates correctly without being affected by magnetism. Further, since no magnetism is generated, there is no effect on data transmission / reception by wireless communication. Further, since no winding is used, it is possible to adopt a simple configuration, and it is possible to reduce the weight and cost.
[0011]
Further, in the communication terminal device according to the present invention, the ultrasonic motor includes an electrostrictive material formed in a plate shape, a first electrode provided on one surface of the electrostrictive material, A triangular projection structure provided on the electrode and having an inverted V-shaped cross section; and a triangular projection structure provided on the other surface of the electrostrictive material and divided at a position facing a vertex of the triangular projection structure And a second electrode, wherein each of the protrusions is supported by the triangular protrusion structures in a plurality of the ultrasonic motors.
[0012]
As described above, since each projection is sandwiched by the pair of ultrasonic motors arranged so that the triangular projection structures face each other, the number of contact points with the projections as the conveyed object increases, and as a result, the frictional force increases. Is increased, so that the output can be increased and the controllability can be enhanced.
[0013]
Further, the communication terminal device of the present invention is characterized in that the triangular projection structure is formed of phosphor bronze.
[0014]
As described above, since the triangular protrusion structure is formed of non-magnetic phosphor bronze, it can be operated without being affected by magnetism. That is, since the ultrasonic motor operates without being affected by magnetism, phosphor bronze, which is a non-magnetic material, is a suitable material to maintain this characteristic. This avoids both generating and being affected by magnetism during operation.
[0015]
Further, the communication terminal device of the present invention is further characterized by further comprising a display unit for displaying image data or character data in a visible manner.
[0016]
As described above, since the display unit is provided in addition to the braille unit, it is possible to display image data and character data. This display unit is configured by, for example, a liquid crystal display or an organic EL display. For example, when applied to a mobile phone, a liquid crystal display can be provided on the same side as the operation buttons, and a Braille unit can be arranged on the back side. This makes it possible to display image data and character data in addition to braille data and three-dimensional data.
[0017]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment in which the present invention is applied to a mobile phone will be described with reference to the drawings. As shown in FIG. 1, a mobile phone 1 includes a casing 2 formed of metal, plastic, or the like, and a Braille display unit 3 and a plurality of operation buttons 4. The braille display unit 3 can represent braille data in six areas. Further, a speaker 5 for outputting voice information as a telephone and a microphone 6 for inputting a user's voice are provided. Further, an antenna 7 for transmitting and receiving data wirelessly is provided. In the present embodiment, the Braille display unit 3 is provided on the same surface as the operation buttons 4, and the liquid crystal display unit for displaying image data and character data is provided on the back side of the housing 2. I do. However, a liquid crystal display unit may be provided on the same side as the operation buttons 4 and a Braille display unit 3 may be provided on the back side of the housing 2 as in a generally known mobile phone.
[0018]
FIG. 2 is a block diagram showing an electrical configuration of the mobile phone 1 according to the present embodiment. The control unit 20 controls input and output of data, execution of a program, and operation of each component in the mobile phone 1. The control unit 20 exchanges data with each component via the control bus 20a. Then, the control unit 20 converts the character data received by the communication interface 22 into Braille data and stores the data in the memory 21. The memory 21 stores programs and data, and outputs the stored programs and data in response to a request from the control unit 20. Communication interface 22 performs wireless communication to transmit and receive data. The input unit 23 has an operation button 4 and a microphone 6 and receives an input of a signal from the operation button 4 and an input of an audio signal from the microphone 6. The power supply unit 24 has a battery, for example, and supplies power to each component.
[0019]
The data input / output interface 25 has a connection terminal at a tip end, and inputs and outputs data by being connected to an information terminal device such as a computer. The audio output unit 26 has the speaker 5 and outputs audio data as audible sound. The image display unit 27 includes, for example, a liquid crystal display, and displays image data and character data.
[0020]
The Braille unit 28 includes a plurality of protrusions that can advance or retract by the driving force of the ultrasonic motor, and displays the Braille by advancing or retracting each projection based on the Braille data. Hereinafter, the Braille unit 28 will be described.
[0021]
The Braille unit 28 converts Braille data as an electric signal into mechanical projection displacement, and displays Braille on the Braille display unit 3. The braille display section 3 is composed of six braille display areas 30a. FIG. 3 is a perspective view showing a part of the braille display unit 3. As shown in FIG. 3, the projections 30 are arranged in three rows and two columns at intervals of 1.2 mm on each Braille display area 30a, and the diameter of the tip of the projection 30 is 1.2 mm.
[0022]
FIG. 4 is a cross-sectional view showing an actuator structure for making each protrusion 30 advance or retract. As shown in FIG. 4, the actuator structure corresponding to each projection 30 has a width, thickness and length of about 1 mm. Thereby, six projections 30 can be provided in the braille display area 30a, and the braille display unit can be downsized. As a result, it is possible to realize a mobile terminal having a braille display unit.
[0023]
The protrusion 30 is integrated with the slider 31, and adopts a configuration in which the protrusion 30 is provided at the tip of the slider 31. The slider 31 is in contact with the tip of the triangular projection structure 33 of the piezoelectric linear actuator 100 and is supported by the opposing triangular projection structure 33 of the piezoelectric linear actuator 100. Each of the triangular projection structures 33 has a function of performing a traveling wave elliptical motion by the displacement of the piezoelectric element 32 and moving the slider 31 to advance or retract the projection 30. Each piezoelectric linear actuator 100 has a structure in which a triangular projection structure 33 is mounted on one piezoelectric element 32 which is entirely polarized in the thickness direction. As described above, since a plurality of polarized portions are not formed in one piezoelectric element, a stress is not partially concentrated and a crack or the like does not occur. As a result, manufacturing costs can be reduced. Further, since the configuration of the piezoelectric linear actuator 100 is simple, miniaturization is easy.
[0024]
Further, since the tip portion of the triangular projection structure 33 is in contact with the slider 31, the number of points of contact with the slider 31 is increased by adopting a structure in which a large number of triangular projection structures 33 are attached, and higher output and stability are achieved. Operation can be realized.
[0025]
FIG. 5 is a perspective view showing the entire structure of the piezoelectric linear actuator 100 alone. As shown in FIG. 5, in the piezoelectric linear actuator 100, electrodes 35 are provided on both surfaces of a single-plate piezoelectric element 32 having a rectangular flat plate shape, and a triangular projection structure 33 having an inverted V-shaped cross section is formed on one upper surface thereof. Are installed. Accordingly, the number of contact points between the triangular protrusion structure 33 and the slider 31 in the actuator increases, and the contact area increases, so that a frictional force can be obtained. As a result, it is possible to realize a small-sized actuator capable of stably obtaining a high output. The lower electrode to which the triangular projection structure 33 is not attached has a structure divided just below each vertex of the triangle. The piezoelectric element 32 constitutes an electrostrictive material, the electrode 35 having the triangular projection structure 33 attached thereto constitutes a first electrode, and the electrode 35 having no triangular projection structure 33 constitutes a second electrode.
[0026]
In the present embodiment, the triangular projection structure 33 is made of non-magnetic phosphor bronze. Thus, since the triangular projection structure 33 is not affected by magnetism, the projection 30 can advance or retreat without being affected by magnetism even in a high magnetic field. In particular, when used for a part of a portable terminal, operation is not affected by data reception by wireless communication. In addition, if it is a nonmagnetic material, the same effect can be obtained without being limited to phosphor bronze.
[0027]
In the present embodiment, lead zirconate titanate (PZT) is used as the material of the single-plate piezoelectric element 32. PZT is ferroelectric PbTiO ₃ And antiferroelectric PbZrO ₃ Pb (Zr, Ti) O ₃ Is represented by The Curie point differs depending on the mixing ratio of the two and is around 320 ° C., but PZT can be used stably since it has no transition point at a temperature from room temperature to the Curie point. In addition, PZT has good sinterability, is relatively easy to polarize, and can be sufficiently polarized. Therefore, it is possible to produce a piezoelectric material having an excellent piezoelectric constant.
[0028]
In addition, PbTiO ₃ And PbZrO ₃ By changing the mixing ratio, adding an additive, or adding a third component, it is also possible to control mechanical Q, relative dielectric constant, and the like.
[0029]
In addition, as a material of the piezoelectric element 32, besides PZT, quartz (SiO2), lithium niobate (LiNbO3), barium titanate (BaTiO3), lead titanate (PbTiO3), lead metaniobate (PbNb2O6), polyvinylidene fluoride (PVDF) can also be used.
[0030]
6 (a) is a top view of the piezoelectric linear actuator 100, (b) is a side view of the piezoelectric linear actuator 100, (c) is a bottom view of the piezoelectric linear actuator 100, and (d) is a right side view of the piezoelectric linear actuator 100. It is. The piezoelectric element 32 is entirely polarized in the thickness direction as shown in FIG. As shown in FIG. 6, electrodes 35 are provided on both sides of a single-plate piezoelectric element 32 having a rectangular flat plate shape, one of which is electrically grounded, and a plurality of triangular projection structures 33 are attached on the upper surface thereof. I have. The lower electrode to which the triangular projection structure 33 is not attached has a structure in which it is divided immediately below each triangle vertex, and each of the divided electrodes has a phase of 90 deg. A shifted sine voltage is applied. This causes the piezoelectric element 32 to bend and deform, and the apex of the triangular projection structure 33 performs an elliptical motion. Thereby, the position holding and control characteristics are improved.
[0031]
FIG. 7 is a diagram showing the operation principle of the piezoelectric linear actuator 100 according to the present embodiment, and FIG. 8 is a diagram showing the operation of a single triangular projection structure 33 specified by α in FIG. FIG. 9 is a diagram showing the state of the piezoelectric linear actuator 100 over time, with the time being shifted every quarter cycle. As described above, the divided lower electrodes have a phase of 90 deg. By applying the shifted sine voltage, the piezoelectric element 32 bends and deforms. Accordingly, the tip of the triangular projection structure can be made to perform an elliptical motion, and this elliptical motion is transmitted to the slider through the frictional force between the tip of the triangular projection structure and the slider, so that the slider is moved in a certain direction. be able to. As shown in FIG. 9, since the phases of the elliptical motions of the adjacent triangular protrusion structures are shifted from each other, one of the many triangular protrusion structures always comes into contact with the slider, thereby achieving a stable linear operation. it can.
[0032]
As described above, since each projection in the Braille unit is advanced or retracted by using the driving force of the ultrasonic motor, the advance / retreat mechanism of each projection can be reduced in size, and a large amount of Braille data can be displayed at one time. Become. In addition, since the ultrasonic motor has high controllability, it is possible to accurately represent Braille data. In addition, the ultrasonic motor does not generate magnetism because it uses ultrasonic vibration as a driving source without using a winding or a magnet as a driving source. For this reason, even in a high magnetic field, it operates correctly without being affected by magnetism. Further, since no magnetism is generated, there is no effect on data transmission / reception by wireless communication. Further, since no winding is used, it is possible to adopt a simple configuration, and it is possible to reduce the weight and cost.
[0033]
Next, the operation of the mobile phone 1 according to the present embodiment configured as described above will be described using a flowchart shown in FIG. First, in the mobile phone 1, the control unit 20 determines whether the communication interface 22 has received data (step S1). Here, the data includes image data and character data downloadable from the Internet, character data obtained by receiving an electronic mail, and the like. If no data has been received in step S1, this determination is repeated, and if data has been received, the data is stored in the memory 21 (step S2). Next, it is determined whether or not to output Braille data (step S3). If Braille data is not output, the process ends. Here, it may be set in advance so that the user operates the operation button 4 to output Braille data, or the Braille data may be automatically output.
[0034]
When outputting braille data in step S3, the control unit 20 reads the data received from the memory 21 and converts the data into braille data (step S4). The process of converting the received data into Braille data can be performed by an existing application. Next, the control unit 20 converts the converted Braille data into address data and outputs it to the Braille unit 28 (Step S5). The Braille unit 28 displays Braille based on the address data input from the control unit 20 (Step S6). For example, as shown in FIG. 11, it is assumed that the Braille display unit 3 in the Braille unit 28 can represent Braille data in six areas A to F. Then, "Ai oh" is displayed in the order of A to F. Further, in the Braille unit 28, each projection is retracted in the standby state, and the projection to which the “ON” signal is input advances. When the "OFF" signal is input to the protruding protrusion, the protrusion retracts.
[0035]
When converting the Braille data to the address data, the control unit 20 outputs an “ON” signal to be input to the Braille unit 28 as address data in a matrix expression. For example, when the braille data corresponding to “A” is to be expressed in the area A, an “ON” signal is output at (A, 1, 1). When the Braille data corresponding to “I” is to be expressed in the area B, an “ON” signal is output to (B, 1, 1) (B, 2, 1). Similarly, when the Braille data corresponding to “U” is to be expressed in the area C, an “ON” signal is output to (C, 1, 1) (C, 1, 2). When the braille data corresponding to "e" is to be expressed in the area D, an "ON" signal is output to (D, 1, 1) (D, 2, 1) (D, 1, 2). When the braille data corresponding to “O” is to be represented in the area E, an “ON” signal is output to (E, 2, 1) (E, 1, 2). Finally, when the braille data corresponding to “A” is to be expressed in the area of F, an “ON” signal is output to (F, 1, 1). The projection to which the “ON” signal is input advances, and the other projections maintain the retracted state. This makes it possible to represent Braille data in the Braille unit 28.
[0036]
When the braille data is displayed in step S6, it is determined whether to change the page (step S7). That is, the control unit 20 outputs data that can be displayed in the six areas A to F as one page. For example, when the user operates a button for turning a page or returning, a page can be changed. When the page is not changed, the display of the braille data in step S6 is maintained, and when the page is changed, the process proceeds to step S4. In step S4, the received data is read out from the memory 21 and converted into Braille data each time. However, the received data is converted into Braille data at the stage of reception, and the converted Braille data is stored in the memory 21. The information may be read as needed.
[0037]
The present invention is not limited to the above-described method of converting Braille data into address data and outputting the converted data to a Braille unit, and it is possible to apply any method of expressing Braille based on received data.
[0038]
Although the present embodiment has been described with respect to the case where braille display is performed, for example, three-dimensional data such as map data having contour lines and weather chart data having isobars is adjusted by adjusting the amount of protrusion of the projection. Can also be displayed. In this case, the protrusion amount of the protrusion and the address data in the matrix expression are expressed in the three-dimensional data format (X, Y, Z) in the same manner as described above, and the protrusion at the position of (X, Y) is the Z protrusion amount. Is performed. As a result, not only Braille, but also three-dimensional data such as map data having contour lines and weather chart data having isobars are displayed three-dimensionally. Data can be recognized. Since this ultrasonic motor has high controllability, it is possible to adjust the amount of protrusion of the projection and accurately express three-dimensional data. Furthermore, the amount of data received per unit time tends to increase due to the recent increase in the data transfer rate. Data can be displayed. In addition, the ultrasonic motor does not generate magnetism because it uses ultrasonic vibration as a driving source without using a winding or a magnet as a driving source. For this reason, even in a high magnetic field, it operates correctly without being affected by magnetism. Further, since no magnetism is generated, there is no effect on data transmission / reception by wireless communication. Further, since no winding is used, it is possible to adopt a simple configuration, and it is possible to reduce the weight and cost.
[0039]
【The invention's effect】
As described above, according to the present invention, a configuration is employed in which each projection of the Braille unit is advanced or retracted by using the driving force of the ultrasonic motor. Can be displayed. In addition, since the ultrasonic motor has high controllability, it is possible to accurately represent Braille data. Further, recently, the data transfer rate has been increased, and the amount of data received per unit time tends to increase. However, according to the present invention, the display speed of braille data is increased. It can be displayed. In addition, the ultrasonic motor does not generate magnetism because it uses ultrasonic vibration as a driving source without using a winding or a magnet as a driving source. For this reason, even in a high magnetic field, it operates correctly without being affected by magnetism. Further, since no magnetism is generated, there is no effect on data transmission / reception by wireless communication. Further, since no winding is used, it is possible to adopt a simple configuration, and it is possible to reduce the weight and cost.
[0040]
In addition, since the Braille data is read from the data storage unit and output to the Braille unit for each Braille data amount that can be displayed at a time, the Braille data can be displayed in page units. Thereby, the convenience can be improved.
[0041]
Further, three-dimensional data can be represented. The three-dimensional data includes, for example, map data having contour lines, weather map data having isobars, and the like. Since the three-dimensional data is displayed three-dimensionally, the user can recognize the data by touching each projection and feeling the unevenness. Since this ultrasonic motor has high controllability, it is possible to accurately represent three-dimensional data. Furthermore, the amount of data received per unit time tends to increase due to the recent increase in data transfer speed. However, according to the present invention, since the display speed of three-dimensional data increases, three-dimensional Data can be displayed.
[0042]
In addition, since each projection is sandwiched by a pair of ultrasonic motors arranged so that the triangular projection structures face each other, the number of points of contact with the projections as a transported object increases, and as a result, the frictional force increases. As a result, the output can be increased and the controllability can be increased.
[0043]
Further, since the triangular projection structure is formed of non-magnetic phosphor bronze, it can be operated without being affected by magnetism. Phosphor bronze is a preferred material in that the ultrasonic motor has the feature of having no magnetic action.
[0044]
In addition, since a display unit is provided in addition to the braille unit, it is possible to display image data and character data. This display unit is configured by, for example, a liquid crystal display or an organic EL display. For example, when applied to a mobile phone, a liquid crystal display can be provided on the same side as the operation buttons, and a Braille unit can be arranged on the back side. This makes it possible to display image data and character data in addition to braille data and three-dimensional data.
[Brief description of the drawings]
FIG. 1 is a schematic diagram of a mobile phone according to an embodiment;
FIG. 2 is a block diagram showing an electrical configuration of the mobile phone according to the embodiment.
FIG. 3 is a perspective view showing a part of a braille display unit.
FIG. 4 is a sectional view showing an actuator structure.
FIG. 5 is a perspective view showing the entire structure of a piezoelectric linear actuator alone.
FIG. 6A is a top view of a piezoelectric linear actuator.
(B) Side view of piezoelectric linear actuator
(C) Bottom view of piezoelectric linear actuator
(D) Right side view of piezoelectric linear actuator
FIG. 7 is a diagram showing the operation principle of a piezoelectric linear actuator.
FIG. 8 is a diagram showing the operation of a triangular projection structure alone.
FIG. 9 is a diagram showing a state of the piezoelectric linear actuator for each quarter cycle.
FIG. 10 is a flowchart showing the operation of the mobile phone according to the present embodiment.
FIG. 11 is a diagram showing a display example of braille data and a corresponding braille display unit.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Mobile telephone, 2 ... Case, 3 ... Braille display part, 4 ... Operation button, 5 ... Speaker, 6 ... Microphone, 7 ... Antenna, 20a ... Control bus, 20 ... Control part, 21 ... Memory, 22 ... Communication Interface 23 23 Input unit 24 Power supply unit 25 Data input / output interface 26 Audio output unit 27 Image display unit 28 Braille unit 30 a Braille display area 30 Projection 30 a Braille Display area, 31: slider, 32: piezoelectric element, 33: triangular projection structure, 35: electrode, 100: piezoelectric linear actuator

Claims (6)

A communication unit for transmitting and receiving data;
A conversion unit that converts the character data received by the communication unit into Braille data,
Braille unit having a plurality of protrusions that can advance or retract by the driving force of the ultrasonic motor,
The communication terminal device, wherein the Braille unit displays Braille by moving each projection forward or backward based on the Braille data. A data storage unit for storing the received character data, or the converted braille data,
The communication terminal according to claim 1, further comprising: a control unit that reads out Braille data from the data storage unit and outputs the Braille data to the Braille unit for each Braille data amount that the Braille unit can display at one time. apparatus. A communication unit for transmitting and receiving three-dimensional data including information of at least unevenness;
A unit having a plurality of protrusions that can be advanced or retracted by the driving force of the ultrasonic motor,
The communication terminal device, wherein the Braille unit displays the three-dimensional data three-dimensionally by moving each of the projections forward or backward based on the three-dimensional data. The ultrasonic motor,
An electrostrictive material formed in a plate shape,
A first electrode provided on one surface of the electrostrictive material,
A triangular projection structure provided on the first electrode and having an inverted V-shaped cross section;
A second electrode provided on the other surface of the electrostrictive material and divided at a position facing a vertex of the triangular protrusion structure;
4. The communication terminal device according to claim 1, wherein each of the protrusions is supported by the triangular protrusion structures in a plurality of the ultrasonic motors. 5. The communication terminal device according to claim 4, wherein the triangular protrusion structure is formed of phosphor bronze. The communication terminal device according to any one of claims 1 to 5, further comprising a display unit that displays the image data or the character data in a visible manner.

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