JP2006222826A - Personal digital assistant with speech function - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To allow a function as a universal design to be mounted to a conventional personal digital assistant with a speech function. <P>SOLUTION: The personal digital assistant with the speech function has a vibration generation function as a means for informing a user of call termination and is provided with a motor (eccentric weight motor 7) for vibration generation and includes a motor drive control means (including a sound signal processing part 3, a motor control signal generation part 4, a syllable logarithmic compression part 5, a motor drive control part 6, etc.) which combines the start and stop of the drive of the eccentric weight motor 7 in accordance with a voice of the other party and determines the combination of the start and stop of the motor drive by a syllabic short-time average value of a sound amplitude and a dynamic threshold. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

The present invention relates to a portable information terminal with a calling function such as a mobile phone and a PDA with a calling function, and more particularly to a portable information terminal with a calling function in which a function as a universal design is implemented.

(1): Description of Conventional Example 1
(a): Overview of Conventional Example 1 From the viewpoint of usage manner, the mobile phone of Conventional Example 1 has a vibration function as an alternative method for notifying the user when it is in an environment that is not suitable for ringing tones and alarms. . As a method for causing vibration, a small DC motor and a so-called vibrator motor in which an eccentric weight is fixed to a rotating shaft thereof are used. It can be said that the current mobile phone is equipped with this motor as standard.

  When listening to or listening to voices, if the content can be almost assumed, the voice and speech can be conveyed only by the strength of a single tone, its rhythm and vibration. For example, imitating a chat using only a musical instrument such as a bass.

  It may be easily conceived or realized by an engineer in the field of detecting the strength of voice, determining the strength with a certain threshold, turning the motor on / off, and driving the motor in conjunction with the voice.

(b): Explanation of masking of original sound by vibration of motor The rotational speed of the motor is approximately 8000 rpm. Thus, a 133 rotation / sec, which is directly a vibration of 133H _Z. FIG. 13 shows a well-known loudness curve-isosensitivity curve. According to FIG 13, a difference of 133H _Z in approximately 4dB compared to 1 kH _Z. In other words, 133H _Z is difficult to hear 4dB compared to 1KH _Z.

133H _Z is the frequency of the terminal by the motor. This vibration is a relatively loud sound of a boon, and when this vibration is heard, it is sufficient to inhibit the original sound by the masking effect. Therefore, the vibration caused by the motor interlocked with the voice makes it difficult to hear the voice.

(c): Explanation of difficulty of motor ON / OFF control linked to voice (speech) waveform FIG. 14 shows an example of a voice (speech) waveform. It is conceivable that the motor is turned ON / OFF by detecting the envelope of the speech waveform and turning it ON / OFF using a certain threshold value. However, ON / OFF determination using a linear waveform has only a relatively short time for a rare opportunity. Or, the ON time is too long to cause the above-described masking effect.

(d): Explanation of difficulty in obtaining sufficient vibration For example, a motor having a vibration function of a mobile phone has an eccentric weight of about 120 mg fixed to the rotating shaft. By rotating this at a steady state at approximately 8000 rpm, the mobile phone has obtained vibration for the manner mode.

(2): Description of Conventional Example 2 Hereinafter, Patent Document 1 will be described as Conventional Example 2. The outline of Conventional Example 2 relates to an information transmission device using vibration, and various messages can be transmitted by changing the frequency and amplitude of vibration of a vibrating body that touches the body.

  That is, the frequency and amplitude of the voice are analyzed, the obtained frequency and amplitude are converted by a predetermined conversion process, and the vibrating body is vibrated by the frequency and amplitude after the conversion process. Thus, a person who feels the vibration of the vibrating body can understand the message from the vibration pattern, and can transmit information by the vibration. Further details are as follows.

  As an information transmission means, a method performed using any one of hearing, vision, and touch is known. As a method of using the auditory sense, there are a ringing tone for a telephone, a telephone conversation, and a ringing tone for a pager. There is a pager message display as a method of using vision. As a method of using the tactile sense, there is a vibration used instead of a ring tone of a mobile phone or a pager.

  When using vibration, a single rhythmic vibration is used. That is, when a mobile phone or a pager is used during a meeting or in a movie theater, the ring tone is annoying to others, so that the vibrating body vibrates with a single rhythm instead of the ring tone. If there is vibration, the user can know that there was an incoming call without being noticed by others.

  Conventionally, information transmission by vibration using tactile sensation is used only for confirmation of presence / absence, and the vibration itself does not have information more than presence / absence. Accordingly, an object of the present invention is to provide an information transmission device using vibration that can transmit information with inherent meaning more than presence or absence even if information transmission is based on vibration using tactile sense. Yes.

  The present invention provides means for inputting speech information, means for decomposing the input speech information for each syllable, extracting primary analysis data relating to sound in each syllable, storing it, and reading from the storage means. A means for converting the primary analysis data into the corrected secondary analysis data, and a vibration generation means capable of adjusting at least one of frequency and amplitude, and the vibration generation means is vibrated using the secondary analysis data. This is an information transmission device using vibration, which is characterized by the above.

Thereby, the person holding the vibration generating means can feel the strength of vibration or the frequency of vibration on the skin and receive not only the presence / absence of vibration but also a unique meaning.
Japanese Patent Laid-Open No. 11-196497

(1): The conventional example 1 has the following problems.

(a): Explanation of masking of original sound by vibration of motor The rotational speed of the vibration generating motor is about 8000 rpm. Thus, a 133 rotation / sec, which is directly a vibration of 133H _Z. FIG. 13 shows a well-known loudness curve-isosensitivity curve. According to FIG 13, a difference of 133H _Z in approximately 4dB compared to 1 kH _Z. That 133H _Z is difficult to hear 4dB compared to 1KH _Z.

133H _Z is the frequency of the mobile phone by the motor. This vibration is a relatively loud sound of a boon, and when this vibration is heard, it is sufficient to inhibit the original sound by the masking effect. Therefore, there is a problem that the vibration caused by the vibration generating motor linked with the sound makes it difficult to hear the sound.

(b): Explanation of difficulty of motor ON / OFF control linked to voice (speech) waveform FIG. 14 shows an example of a voice (speech) waveform. It is conceivable that the vibration generating motor is turned ON / OFF by detecting the envelope of the voice waveform and using a certain threshold value. However, the ON / OFF determination using a linear waveform has a problem that it is rare to have time to turn on only for a relatively short time. Alternatively, there is a problem that the ON time is too long to cause the above-described masking effect. Thus, there is a problem that it is difficult to set a threshold value.

(c): Explanation of difficulty in obtaining sufficient vibration For example, a motor having a vibration function of a mobile phone has an eccentric weight of about 120 mg fixed to the rotating shaft. By rotating this at a steady state at approximately 8000 rpm, the mobile phone has obtained vibration for the manner mode.

  However, there is a problem that a startup time is required until the steady state is reached. Therefore, there is a problem that it is difficult to obtain vibration or impact during this period even if the motor is turned on for 500 ms and for 0.1 s.

  (2): The conventional example 2 has the following problems.

  In the conventional example 2, the use of a piezoelectric element has been proposed separately in order to transmit vibration of sound. Or, we have proposed a motor mechanism for transmitting high-quality restored speech (frequency and amplitude, and their changes). However, vibration with an eccentric weight motor can be said to be almost standard equipment in mobile phones, and there is a disadvantage in that it is necessary to prepare a new element for that purpose, that is, in terms of cost, weight, area, and volume .

  The present invention solves the above-mentioned problems, transmits vibrations linked to the other party's voice to the human body at the time of an incoming call, and functions as a hearing aid by transmitting not only hearing but also sensation. The purpose is to make it possible to implement functions as a design.

In order to achieve the above object, the present invention is configured as follows.

  (1): In a portable information terminal with a calling function having a vibration generating function as a means for notifying a user at the time of an incoming call, and having a vibration generating motor (eccentric weight motor) for this purpose, The motor driving is performed by a combination of start and stop in conjunction with the voice of the other party, and the combination of the start and stop of the motor drive is determined by a syllable short-time average value of the voice amplitude and a dynamic threshold. Control means is provided.

  (2): In the portable information terminal with call function according to (1), the motor drive control means uses a rotation of the motor and an eccentric weight attached to the rotation shaft of the motor when driving the motor. Rather, it is characterized by having a function of driving by reversing the voltage applied to the motor or the current to be injected and repeating it.

  (3) In the portable information terminal with a calling function according to (2), the motor drive control means, when controlling the drive of the motor, suddenly rotates the motor at the instant of repeated switching of the applied voltage or the injected current. In order to perform braking, the motor is once provided with a function of short-circuiting both ends.

(4): In the portable information terminal with a calling function according to (2), when the motor drive control means controls the drive of the motor, the voltage application or current injection period is relatively long in a state where the motor reaches a steady state. time to, rotation, repetition frequency of the motor drive in the reverse rotation is set to about several tens of H _Z, and characterized in that it comprises super-low-pass dull audio frequency band of the human sensitivity, or a function of a band lower out To do.

  (5): In the portable information terminal with a calling function of (2), when the motor drive control means controls the drive of the motor, the application of voltage or the injection of current should not be interrupted during the period when the motor is not driven. In order to drive instantaneously, the voltage or current in the vicinity of the start start voltage is given to the motor, and the voltage or current in the vicinity of the start start voltage is a reversal of the immediately preceding voltage application. It has a function of applying a voltage opposite to the above.

(Function)
FIG. 1 is a diagram illustrating the principle of the present invention. The operation of the present invention will be described below with reference to FIG.

  (a): In the above (1), the motor drive control means (means including the audio signal processing unit 3, the motor control signal creation unit 4, the syllable logarithmic compression unit 5, and the motor drive control unit 6) The lead weight motor 7) is driven by a combination of start and stop in conjunction with the voice of the other party. Further, the combination of the start and stop of the motor drive is determined by the syllable short-time average value of the voice amplitude and the dynamic threshold value.

  (b): In (2), when the motor drive control means drives and controls the motor, the voltage applied to the motor is not based on the rotation of the motor and the eccentric weight attached to the rotation shaft of the motor. Alternatively, it is driven by inversion of the injected current and its repetition.

  (c): In the above (3), the motor drive control means, when driving and controlling the motor, temporarily stops the rotation of the motor at the instant of repeated switching of the applied voltage or the injected current. Short-circuit both ends.

(d): In the above (4), when controlling the motor, the motor drive control means sets the period of voltage application or current injection to a relatively long time for the motor to reach a steady state, and performs rotation and reverse rotation. repetition frequency of the motor drive is set to about several tens of H _Z, super-low-pass dull audio frequency band of the human sensitivity, or the band lower limit out.

  (e): In the above (5), when the motor drive control means controls the drive of the motor, during the period in which the motor is not driven, voltage application or current injection is not interrupted, but is driven instantaneously. A voltage or current in the vicinity of the start start voltage is applied to the motor. Further, since the voltage or current in the vicinity of the starting start voltage is a reversal of the previous voltage application, a voltage opposite to the previous voltage application is given.

  (f): As described above, in the portable information terminal with a calling function according to the present invention, the vibration linked to the other party's voice is transmitted to the human body at the time of incoming call, and as a hearing aid by transmitting not only hearing but also feeling. Functions can be implemented as a universal design function on a portable information terminal with a call function.

The configuration of the present invention has the following effects.

  (1): Can transmit vibration linked to voice (including speech etc.).

  (2): Can transmit not only hearing but also sense. That is, by transmitting the syllable of the audio signal by vibration, it becomes easier to understand the content of the audio.

  (3): Can function as a hearing aid.

  (4): It is not necessary to add new devices (especially motors).

  (5): Functions can be implemented as a universal design in various types of portable information terminals with telephone functions including mobile phones.

  In the following description, an example in which the present invention is applied to a mobile phone will be described.

§1: Explanation of mobile phone configuration
(1): Description of entire mobile phone FIG. 2 is a block diagram of the mobile phone. As shown in FIG. 2, the cellular phone includes a cellular phone body 1, an antenna 21, a display 22, a key operation unit 23, a speaker / microphone (SP / MIC) 24, and the like connected to the cellular phone body 1. Has been.

  The mobile phone body 1 includes a processor 2, an audio signal processing unit 3, a motor control signal creation unit 4, a syllable logarithmic compression unit 5, a motor drive control unit 6, and control of the motor drive control unit 6. Are provided with an eccentric weight motor 7, a radio unit 8, an input / output unit (GPIO) 9, an I / O control unit (input / output control unit) 10, a memory 11, and the like.

  The processor 2 performs various controls and processes of the mobile phone, and includes a CPU, MPU, DSP and the like. The voice signal processing unit 3 receives an incoming call and extracts the other party's voice signal when the call is started via the input / output unit 9 to process a voice signal necessary for motor drive control (pre-necessary processing). Set the content).

  The motor control signal generation unit 4 is a motor control signal necessary for driving and controlling the motor (for example, a motor switching circuit switch switching signal, a switch on / off signal, a control signal for short-circuiting the motor, and for motor control. Including necessary clock or clock pulse extraction). The motor control signal created here is sent to the motor drive control unit 6 and used to control the eccentric weight motor 7.

  The syllable logarithmic compression unit 5 performs syllable compression processing (the syllable compression processing itself is a well-known technique) on the audio signal. The motor drive control unit 6 takes in signals from the audio signal processing unit 3, the motor control signal creation unit 4, the syllable logarithmic compression unit 5, and the like based on instructions from the processor 2, and performs drive control on the eccentric weight motor 7. Is. The eccentric weight motor 7 is driven under the control of the motor drive control unit 6 and is an existing one (vibration generating motor).

  The radio unit 8 is connected to the antenna 21 and transmits and receives radio frequency signals. The input / output unit (GPIO) 9 performs general-purpose various input / output control including an audio signal. The I / O control unit (input / output control unit) 10 performs input / output control between the mobile phone body 1 and the display 22, the key operation unit 23, and the SP / MIC 24. The memory 11 is used by the processor 2, the audio signal processing unit 3, the motor control signal creation unit 4, the syllable logarithmic compression unit 5 and the like for work.

(2): Detailed Description of Motor Drive Control Unit FIG. 3 is a block diagram of the motor drive control unit. The motor drive control unit 6 includes, for example, a slice circuit 31, a waveform shaping circuit 32, an AND circuit (or AND gate circuit) 33, a low frequency pulse generation unit 34, and the like as shown in FIG. ing.

  The motor drive control unit 6 extracts the voice signal sent from the voice signal processing unit 3 and the clock sent from the motor control signal creation unit 4 (the motor control signal creation unit 4 extracted the clock pulse in the cellular phone). The output signal is supplied to the eccentric weight motor 7 as a drive signal.

In this case, the input audio signal is sliced by a threshold value (VH1, VH2) set in advance by the slicing circuit 31, and then waveform shaping is performed by the waveform shaping circuit 32 to create a motor drive gate signal. A motor drive gate signal is input to one input terminal of the AND circuit 33. Also, clock input after such minute division and signal amplitude or pulse width has been adjusted by the low-frequency pulse forming unit 34, and inputs to the other input terminal of the AND circuit 33 becomes a frequency = 10H _Z pulse.

The circuit having such a configuration, the the gate of the AND circuit 33 is opened by the audio signal waveform shaping by the waveform shaping circuit 32, the pulse of the low frequency pulse is output from the creation unit 34 frequency = 10H _Z is AND It passes through the circuit 33 and is supplied to the eccentric weight motor 7 as a motor drive pulse. Details of the operation will be described later.

§2: Explanation for motor drive control
(1): Description of Low-frequency Pulse Driving Example 1 of Motor FIG. 4 is an explanatory diagram of low-frequency pulse driving example 1 of the motor. In FIG. 4, A figure speech waveform (eg), B diagram gate signal for motor driving, C diagrams pulse driving clock (for example, 10H _Z), D figure is a diagram showing a motor control. Further, VH1 indicates an upper limit threshold value, VH2 indicates a lower limit threshold value, and there is a relationship of VH1> VH2. Hereinafter, a low-frequency pulse driving example 1 of the motor will be described with reference to FIGS.

  First, when a call is started by an incoming call, the audio signal processing unit 3 extracts the other party's audio signal from the input / output unit 9 and sends the extracted audio signal to the motor drive control unit 6. The motor drive control unit 6 takes in the audio signal, and slices the waveform using the two threshold values (VH1> VH2) of VH1 and VH2 in the slice circuit 31 shown in FIG. 3 (see FIG. 4A). Thereafter, waveform shaping is performed by the waveform shaping circuit 32 to create a motor drive gate signal (see FIG. 4B), which is input to one input terminal of the AND circuit 33.

  With this motor drive gate signal, the gate of the AND circuit 33 is controlled to open only during the time T1 to T2, and the gate of the AND circuit 33 is closed during other time periods.

On the other hand, the low frequency pulse forming unit 34, after the amplitude or pulse width, etc. of the input clock frequency dividing and the signal is adjusted, for example, a frequency to create a low frequency pulse of 10H _Z (see C of FIG. 4 ), And sends the low frequency pulse to the other input terminal of the AND circuit 33. Therefore, in this example, a low-frequency pulse driving clock is supplied to the eccentric weight motor 7 only during the time T1 to T2, which is a section in which there is a voice waveform that exceeds VH1 or falls below VH2. The lead weight motor 7 is driven (see FIG. 4D).

In this way, a period in which the waveform amplitude of the other party's voice is large is detected, and a motor driving gate signal for passing the pulse driving clock is generated only during this period. Further, low frequency, for example, are prepared a clock signal of 10H _Z. Then, the motor is pulse-driven at a low cycle by the logical product of the gate signal and the clock signal. Since the driving cycle in this case is outside the audible frequency band, the masking effect can be avoided.

(2): Explanation of motor hysteresis characteristics and standby bias voltage application Figure 5 shows the motor hysteresis characteristics. The motor (for example, the eccentric weight motor 7) has an activation start voltage. Even if a positive voltage is gradually applied from 0 V, rotation does not start at a low voltage. The rotation starts from about 0.7V. Thereafter, the state shifts to a steady state where the rotational speed is increased in proportion to the voltage. The motor is driven at a rated voltage of approximately 1.6 V, which is slightly more than twice the starting voltage.

  On the other hand, when the voltage is gradually lowered from the steady state, the motor keeps rotating even when the voltage becomes lower than the starting voltage, and stops at about 0.3V. The same applies to negative voltages. Moreover, most vibrator motors have no polarity, and behave in the same way in the opposite direction only with different rotational speeds.

  For this reason, a bias voltage slightly lower than the starting voltage, for example, 0.5 V, is applied during standby in which the motor is not rotated when there is no sound or a low sound, and the motor is brought into a starting critical state. Compared with voltage ON / OFF driving, a larger starting impact can be obtained by applying bias voltage → rated voltage.

(3): Explanation of motor free run and self-braking due to electrode short circuit FIG. 6 is an explanatory diagram of motor free run. Conventionally, in most cases, the motor is turned on and off by applying an electric voltage by an electronic switch such as a transistor. When the motor is turned off, the switch is opened (High-Z: high impedance state), and no current flows through the motor and its associated circuits. When no voltage is applied, the motor continues to rotate due to inertia.

  This rotation is gradually reduced as the inertial energy is consumed by mechanical friction, and the rotation stops when the friction becomes less than the limit to overcome the friction. In other words, it is a free run stop. Therefore, turning off the motor by opening the switch has little impact.

  In FIG. 6, a circuit including a motor M, an electronic switch, and the like is provided in the motor drive controller 6 shown in FIG. Then, the ON / OFF control signal of the electronic switch is generated by the motor control signal generating unit 4 in FIG. 2 and supplied to the circuit in FIG.

(4): Explanation of self-braking due to motor terminal short-circuit FIG. 7 is an explanatory diagram of self-braking due to motor terminal short-circuiting. In this case, as shown in FIG. 7, the electronic switch ESW1 for motor ON / OFF, the ON / OFF control line for the electronic switch ESW1, the electronic switch ESW2 for short circuit, the short circuit control line for electronic switch ESW2, Is provided. When the motor (M in FIG. 7) is turned OFF, the electronic switch ESW2 provided for short-circuiting is closed and the motor M is short-circuited.

  The motor M is self-braking and stopped by the counter electromotive current caused by the short circuit. This self-braking is effective as you can feel from the engine brakes of a car or the stop of a train. A stop impact can be obtained by turning off the motor M due to this short circuit.

  Also in this case, in FIG. 7, a circuit including the motor M, the two electronic switches ESW1, ESW2, the control lines, and the like is provided in the motor drive control unit 6 shown in FIG. Then, the ON / OFF control signals and short circuit control signals of the electronic switches ESW1 and ESW2 are generated by the motor control signal generating unit 4 in FIG. 2 and supplied to the circuit in FIG.

(5): Explanation of Low Frequency Pulse Driving Example 2 of Motor FIG. 8 is an explanatory diagram of Low Frequency Pulse Driving Example 2 of the motor. In addition to the low-frequency pulse driving, OFF bias voltage application (startup acceleration), and OFF motor short-circuiting described above, the motor drive performs reverse voltage driving.

A bias voltage is applied to the motor when the motor is turned off during silent or low sound. When the volume reaches a time interval that exceeds the threshold, the rated voltage is applied. Pulse period clock (e.g., 50 ms if the 10H _Z) after applying, opening the application circuit of the switch, to obtain a brake by the self-braking shorted almost simultaneously motor.

  Immediately thereafter, a rated voltage having a reverse polarity is applied to start the motor in reverse rotation. This pulse control is repeated for a time interval in which the volume exceeds the threshold value. At the end of the time interval when the volume exceeds the threshold, after the rotation is stopped due to a motor short circuit, a bias voltage is applied and the next pulse drive time interval is awaited. In this way, the vibrator function motor worn by most cellular phones and the like is used as it is to obtain low-frequency vibrations along the strength of the sound.

  FIG. 9 is an explanatory diagram of an example of a motor drive current switching circuit. In FIG. 9, SW1a and SW1b are interlocking switches. SW2a and SW2b are interlocked switches. SW3 is a switch for short-circuiting the motor.

  During pulse driving, the control logic of (SW1a and SW1b) and (SW2a and SW2b) is opposite, but the moment when SW3 is closed is independent to isolate the motor from the supply side, or for a short time 2 It is better to have a moment of opening (High-Z: high impedance state).

  Such a circuit is a 100 mA class, relatively large current control as a mobile phone, but it is not large in terms of the number of elements and scale, so it is impossible to incorporate this function into a power management LSI chip having a charging function or the like. Not difficult.

  Also in this case, the circuit including the motor M, five switches (SW1a and SW1b, SW2a and SW2b, SW3), etc. shown in FIG. 9 is provided in the motor drive control unit 6 shown in FIG. is there. Then, the ON / OFF control signals and the short circuit control signals of the five switches are generated by the motor control signal generating unit 4 of FIG. 2 and supplied to the circuit of FIG.

(6): Explanation of presence / absence of voice and magnitude determination As shown in FIG. 14 shown in the conventional example and as described in the problem of the invention, the waveform of the voice changes greatly with a linear amplitude, It is difficult to control the ON / OFF gate of the motor linked to the strength. In order to solve this, syllable logarithmic compression of amplitude is performed.

  FIG. 10 is an explanatory diagram of a linear amplitude envelope of speech. The audio signal is smoothed by full-wave rectification, or connected with the absolute value of the instantaneous value. As shown in FIG. 10, it is difficult to set a threshold value for ON / OFF determination with a linear waveform, and it is said that the human sense is proportional to a logarithmic scale, which is not appropriate.

  FIG. 11 is an explanatory diagram of the amplitude envelope of speech that has been syllable logarithmically compressed. As shown in FIG. 11, the motor drive ON / OFF determination is small even if the threshold value is slightly increased or decreased. It is also tolerant to the determination of the ON section, its interval, and moderate fluctuations in a relatively large section. Syllable logarithmic compression can be realized by using an analog integrated circuit (which is generally marketed as an IC chip and is well known) called a syllabic compressor. It is also known that it can be realized using a DSP (digital signal processor). As described above, the syllable logarithmic compression is well-known or can be readily realized by using a well-known technique, and detailed description thereof will be omitted.

(7): Explanation of control of mobile phone by flowchart FIG. 12 is a control flowchart of the mobile phone. Hereinafter, control of the mobile phone will be described with reference to FIG. In FIG. 12, S1 to S7 indicate control steps.

  The processor 2 waits for the mobile phone to start a call when an incoming call is received. When the call starts (S1), the processor 2 gives necessary instructions to each unit. In response to this instruction, the voice signal processing unit 3 extracts the voice signal of the other party from the input / output unit 9 and starts processing the necessary voice signal (S2).

  Further, the motor control signal creation unit 4 starts creating a necessary motor control signal according to an instruction from the processor 2 (S3). Subsequently, the syllable logarithmic compression unit 5 starts syllable logarithmic compression processing on the audio signal (S4). The generated signals are sent to the motor drive control unit 6.

  Next, the motor drive control unit 6 receives signals from the audio signal processing unit 3, the motor control signal creation unit 4, and the syllable logarithmic compression unit 5, and then controls the eccentric weight motor 7 in conjunction with the audio signal ( Drive control) is started (S5). Then, the motor drive control unit 6 controls the eccentric weight motor 7 to generate vibration linked to the audio signal while changing the drive current (S6). Thereafter, it is determined whether or not the audio signal has ended (S7). When the audio signal has ended, this control is ended.

(8): Summary of mobile phones The mobile phones described above are summarized as follows.

A: Description of functions The functions of the mobile phone are as follows.

  (a): The motor is driven by a combination of start and stop in conjunction with the voice of the other party, and the motor drive start and stop is combined with the syllable short-time average value of the voice amplitude and the movement. It has a function to decide at a certain threshold.

  (b): When driving and controlling a motor, it is not based on the rotation of the motor and the eccentric weight attached to the rotating shaft of the motor, but the function of driving by reversing the voltage applied to the motor or the current to be injected and repeating it It has.

  (c): When driving the motor, both ends of the motor are temporarily short-circuited in order to suddenly brake the rotation of the motor at the instant of repeated switching of the applied voltage or injected current.

(d): When driving and controlling the motor, a relatively long time in a state where the duration of voltage application or current injection motor reaches a steady state, rotation, repetition frequency of the motor drive in the reverse rotation order of several tens of H _Z And a function to make the audio frequency band insensitive to humans extremely low or outside the lower limit of the band.

  (e): When controlling the drive of the motor, during the period when the motor is not driven, voltage or current in the vicinity of the start-up voltage is applied to the motor in order to drive it instantaneously, instead of stopping voltage application or current injection. And a voltage or current in the vicinity of the start-up voltage is a reversal of the previous voltage application, and thus has a function of applying a voltage opposite to the previous voltage application.

B: Explanation at the time of use When a mobile phone is used, it is as follows.

  (a): When a mobile phone user starts a call when an incoming call is received, the content of the other party's call is output in voice from the speaker of the mobile phone. Thereafter, the user makes a call using the microphone and the speaker of the mobile phone, and when the call ends, the user ends the call.

  (b): While making a call as described above, the eccentric weight motor 7 in the mobile phone is driven and controlled by the motor drive control unit 6 according to the voice of the other party. In this case, the eccentric weight motor 7 vibrates as described above according to the voice signal of the other party, and the body (case, etc.) of the mobile phone vibrates due to the vibration.

  Therefore, the user senses the vibration of the body (case, etc.) of the mobile phone, and the vibration is added to the content of the call. That is, the user makes a call while sensing the vibration.

  (c): The vibration is vibration according to the content of the call. If the content of the call is simple, the user can know the outline of the content of the call only with this vibration. Therefore, since the call is performed while detecting the vibrations that give an outline of the content of the call with the body, understanding of the content of the call is further facilitated. Moreover, it is not necessary to add a new device (especially a motor).

  (d): If the mobile phone is used, vibration linked to voice (including speech etc.) can be transmitted, and not only hearing but also sense can be transmitted. That is, by transmitting the syllable of the audio signal by vibration, the content of the audio becomes easier to understand and can function as a hearing aid.

  In this case, for example, the design of a mobile phone to which the contents (or functions) described in the above (a) to (d) are added is called “universal design”. Therefore, according to the example of the mobile phone described above, the universal design function can be mounted on the mobile phone.

: Other explanation
(a): The present invention is not limited to the mobile phone as described above, but can be applied to various portable information terminals such as a PDA having a call function. Therefore, a universal design function can be implemented in various portable information terminals with a call function.

  (b): The audio signal processing unit 3, the motor control signal creation unit 4, the syllable logarithmic compression unit 5 and the like shown in FIG. 2 can be processed at high speed by, for example, a DSP (digital signal processor). is there. Further, if these are manufactured as a small chip as a semiconductor integrated circuit device and mounted on a portable information terminal, the size can be further reduced.

It is a principle explanatory view of the present invention. 1 is a block diagram of a mobile phone in an embodiment. It is an example of the motor drive control part in embodiment. It is explanatory drawing of the low frequency pulse drive example 1 of the motor in embodiment. It is explanatory drawing of the hysteresis characteristic of the motor in embodiment. It is explanatory drawing of the free run of the motor in embodiment. It is explanatory drawing of the self-braking by the short circuit of the motor in embodiment. It is explanatory drawing of the low frequency pulse drive example 2 of the motor in embodiment. It is explanatory drawing of the motor drive current switching circuit example in embodiment. It is explanatory drawing of the linear amplitude envelope of the audio | voice in embodiment. It is explanatory drawing of the amplitude envelope of the audio | voice by which the syllable logarithm compression was carried out in embodiment.

It is a control flowchart of the mobile phone in the embodiment. It is a loudness curve-isosensitivity curve in a conventional example. It is an example of the audio | voice signal waveform in a prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Mobile phone main body 1A Portable information terminal with a telephone call function 2 Processor 3 Voice signal processing part 4 Motor control signal preparation part 5 Syllable logarithm compression part 6 Motor drive control part 7 Eccentric weight motor 8 Radio part 9 Input / output part 21 Antenna 22 Display 23 Key operation unit 24 Speaker / microphone (SP / MIC)
31 Slice circuit 32 Waveform shaping circuit 33 AND circuit (AND gate circuit)
34 Low frequency pulse generator

Claims (5)

In a portable information terminal with a call function having a vibration generating function as a notification means to the user at the time of incoming call, and having a motor for vibration generation for that purpose,
The motor is driven by a combination of start and stop in conjunction with the voice of the other party, and the motor drive start and stop is combined with a syllable short-time average value of voice amplitude and a dynamic threshold. A mobile information terminal with a call function, characterized by comprising motor drive control means determined in step (1).   The motor drive control means does not depend on the rotation of the motor and the eccentric weight attached to the rotation shaft of the motor, but the reversal of the voltage applied to the motor or the current to be injected and the repetition thereof when driving the motor. The mobile information terminal with a call function according to claim 1, further comprising a function driven by the mobile phone.   The motor drive control means has a function of short-circuiting both ends of the motor once in order to suddenly brake the rotation of the motor at the instant of repeated switching of the voltage to be applied or the current to be injected when driving the motor. The portable information terminal with a calling function according to claim 2, wherein the portable information terminal has a calling function. When the motor drive control means controls the motor, the period of voltage application or current injection is set to a relatively long time for the motor to reach a steady state, and the repetition frequency of rotation and reverse rotation of the motor is several tens. and about H _Z, super-low-pass dull audio frequency band of the human sensitivity, or a portable information terminal with communication function according to claim 2, characterized in that it comprises a function of a band limit out. When the motor drive control means controls the motor, during the period when the motor is not driven, voltage application or current injection is not interrupted, but voltage or current in the vicinity of the start start voltage is used to drive instantaneously. The function to give to the motor,
The voltage or current in the vicinity of the start-up voltage is a reversal of the previous voltage application, and thus has a function of giving a voltage opposite to the previous voltage application. Mobile information terminal.

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