JP2002074306A - Portable information unit, method for controlling portable information unit, recording medium and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress the deterioration of the communication sensitivity of a non-contact IC card circuit, the shortening of a communication distance and the occurrence of a communication error even if a display part in the antenna of the non-contact IC card circuit cannot be arranged to be away from each other due to the relation of device sizes. SOLUTION: In a wristwatch 11 capable of making radio communication with an external device through the antenna, it is inhibited that the display part 29 is displayed during a data communication period corresponding to a radio communication start signal when the radio communication start signal is received from an external transmitter-receiver 12.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a portable information device,
The present invention relates to a method for controlling a portable information device, a recording medium on which a control program for a portable information device is recorded, and a program for controlling a portable information device. The present invention relates to a portable information device capable of communication, a control method for the portable information device, a recording medium storing a control program for the portable information device, and a program for controlling the portable information device.

[0002]

2. Description of the Related Art Conventionally, a magnetic card has been known as an information recording medium for recording various information. Although this magnetic card can be manufactured at low cost, it has a problem that it cannot record a large amount of information and it is difficult to maintain confidentiality. In recent years, to solve this problem, IC cards capable of storing a large amount of information and easily maintaining confidentiality have been developed and spread. Among such IC cards, a non-contact type IC card has a function such as a train ticket, a commuter pass, and a lift card at a ski resort that can exchange data at high speed just by approaching a reader / writer. Various applications are desired from the viewpoint of maintenance-free properties. In the above-described conventional non-contact type IC card, data contents cannot be displayed by the IC card alone. When a non-contact IC card is used as a small amount of electronic money, a train ticket, or the like, the inability to confirm the amount of use or the balance at the use timing is inconvenient.

[0003]

In order to solve this problem, a portable information device is provided with a non-contact IC card circuit for realizing the same function as a non-contact IC card, and a liquid crystal display for displaying various information. It is conceivable to check the usage amount and balance by providing a display or an organic EL display. However, communication noise in a non-contact IC card circuit is degraded due to electromagnetic noise caused by digital control of a display device such as a liquid crystal display or an organic EL light emitting display, and a communication distance may be shortened or a communication error may occur. It will be. In this case, there are various causes of the generation of electromagnetic noise from a display device that displays various information by digital control. For example, when an AC waveform is applied to a display panel such as a liquid crystal display or an organic EL light emitting display. Alternatively, it is generated by turning on / off a switching operation of a booster circuit for boosting a drive power supply of a display panel.

[0004] In particular, this problem is caused by the fact that the device is small, such as a portable information device having a wristwatch shape, and is not in contact with a display section such as a liquid crystal display or an organic EL light emitting display.
It is thought that this will occur remarkably in portable information devices in which it is difficult to arrange the antennas of the C card circuit apart. Therefore, an object of the present invention is to reduce the communication sensitivity of the non-contact IC card circuit even when the display unit and the antenna of the non-contact IC card circuit cannot be separated from each other due to the size of the device. A portable information device capable of shortening a communication distance and suppressing occurrence of a communication error, a control method of the portable information device, a recording medium storing a control program for the portable information device, and a portable information device. It is to provide a control program.

[0005]

In order to solve the above-mentioned problems, a configuration of the present invention comprises a wireless communication unit capable of performing wireless communication with an external device via an antenna, and various kinds of information by digital control. And a display prohibition unit for prohibiting display on the display unit during a data communication period in the wireless communication unit. A wireless communication unit capable of performing wireless communication with an external device via an antenna, a display unit for displaying various information by digital control, and a wireless communication start signal received by the wireless communication unit. A display prohibition unit for prohibiting display on the display unit during a data communication period corresponding to the wireless communication start signal. According to the above configuration, the wireless communication unit performs wireless communication with the external device via the antenna, and the display unit displays various information by digital control. Then, the display prohibition unit prohibits the display on the display unit during the data communication period in the wireless communication unit.

A wireless communication unit capable of performing wireless communication with an external device via an antenna, a display unit for displaying various information by digital control, and a wireless communication start signal transmitted from the wireless communication unit. A display prohibition unit for prohibiting display on the display unit during a data communication period corresponding to the wireless communication start signal when receiving the signal. According to the above configuration, the wireless communication unit performs wireless communication with the external device via the antenna, and the display unit displays various information by digital control. The display prohibition unit prohibits display on the display unit during a data communication period corresponding to the wireless communication start signal when the wireless communication unit receives the wireless communication start signal.

In this case, a control unit for alternately performing the data communication in the wireless communication unit and the display on the display unit may be provided.

[0008] The display unit includes a display panel unit that actually performs display and a display drive unit that drives the display panel unit. The display prohibition unit is configured to prohibit display on the display unit. The operation of the display drive unit may be stopped.

Further, the display section includes a display panel section for actually performing display, and a display drive section for driving the display panel section based on an external display control signal. When the display on the display unit is prohibited, the input of the display control signal may be prohibited. In this case, the antenna may constitute the wireless communication section, and may be provided on the display panel section side of a circuit board on which the circuit for performing the wireless communication is mounted.

[0010] Furthermore, the wireless communication unit may perform bidirectional wireless communication with an external device.

[0011] Further, a clock processing unit for performing a clock processing and a battery for supplying power are provided, and the display unit is configured to always display a clock by supplying power from the battery under the control of the clock processing unit. May be. Further, it may have a wristwatch shape that can be worn on the user's arm.

Further, there is provided an illumination unit arranged on the back side or the front side of the display unit for illuminating the display unit, and an illumination prohibition unit for prohibiting illumination by the illumination unit during data communication in the wireless communication unit. You may do so. In this case, the lighting unit may include an EL lighting device.

A method for controlling a portable information device, comprising: a wireless communication unit capable of performing wireless communication with an external device via an antenna; and a display unit for displaying various information by digital control. Wherein the wireless communication unit prohibits display on the display unit during data communication. According to the configuration, the display on the display unit is prohibited in the wireless communication unit during the data communication.

A method for controlling a portable information device, comprising: a wireless communication unit capable of performing wireless communication with an external device via an antenna; and a display unit for displaying various information by digital control. Wherein, when a wireless communication start signal is received by the wireless communication unit, display on the display unit is prohibited during a data communication period corresponding to the wireless communication start signal. According to the configuration, when the wireless communication unit receives the wireless communication start signal, the display on the display unit is prohibited during the data communication period corresponding to the wireless communication start signal.

In these cases, the data communication and the display may be performed alternately. Also,
When the display on the display unit is prohibited, the display driving operation may be stopped. Further, when the display on the display unit is prohibited, the input of a display control signal from the outside to the display unit may be prohibited. Furthermore, the illumination of the display unit may be prohibited in the wireless communication unit during the data communication period.

Also, a portable information device having a wireless communication unit capable of performing wireless communication with an external device via an antenna and a display unit for displaying various information by digital control is controlled. A computer for determining whether or not data communication is being performed in the wireless communication unit on a recording medium on which a program for recording is stored, and prohibiting display on the display unit during data communication in the wireless communication unit. The program is characterized by recording a program for causing the program to be executed.

Also, a portable information device including a wireless communication unit capable of performing wireless communication with an external device via an antenna and a display unit for displaying various information by digital control is controlled. A recording medium on which a wireless communication start signal is received by the wireless communication unit, and when the wireless communication unit receives the wireless communication start signal, the wireless communication unit starts the wireless communication. During a data communication period corresponding to a signal, a program for prohibiting display on the display unit is recorded.

Further, the present invention controls a portable information device including a wireless communication unit capable of performing wireless communication with an external device via an antenna, and a display unit for displaying various information by digital control. A program for causing a computer to determine whether or not data communication is being performed in the wireless communication unit, and prohibiting display on the display unit while data communication is being performed in the wireless communication unit. It is characterized by.

Also, a portable information device having a wireless communication unit capable of performing wireless communication with an external device via an antenna and a display unit for displaying various information by digital control is controlled. A program for causing a computer to determine whether a wireless communication start signal has been received in the wireless communication unit, and in the wireless communication unit,
When a wireless communication start signal is received, display on the display unit is prohibited during a data communication period corresponding to the wireless communication start signal.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a preferred embodiment of the present invention will be described with reference to the drawings. [1] First Embodiment First, a first embodiment of the present invention will be described. [1.1] Configuration of Data Communication System First, a schematic configuration of the data communication system will be described with reference to FIG. In the following description, a data communication system for performing entrance / exit management will be described as the data communication system. The data communication system 10 is roughly divided into a wristwatch 11 having a built-in contactless IC card function.
And an external transmission / reception device 12 for performing data communication with the wristwatch 11. External transceiver 1
2 is a control device 13 for controlling the entire external transmission / reception device 12
A transmission circuit 14 for generating and outputting a transmission control signal under the control of the control device 13, and a demodulation of a reception signal input from a high-frequency circuit 16, which will be described later, as the reception data.
And a transmission circuit for generating a transmission signal based on the transmission control signal, transmitting the transmission signal to the wristwatch 11 via the antenna 17, and generating a reception signal from the original reception signal received from the wristwatch 11 via the antenna 17. And receiving circuit 1
And a radio frequency (RF) circuit 16 for outputting the signal to the RF circuit 5.

[1.2] Arrangement of External Transmitting / Receiving Apparatus FIG. 2 is an external perspective view of the gate when the external transmitting / receiving apparatus 12 is installed on a gate for easily controlling entrance and exit. As shown in FIG. 2, an external transmission / reception device 12 is installed in a gate G, and an antenna 17 formed as a loop antenna for performing data communication is provided in a part of the gate G.
Are built in and arranged, and when passing through the gate G, the user approaches the wristwatch 11 having the IC card function, thereby performing bidirectional data communication. In this case, the frequency of the carrier (carrier signal) is generally 13.56 [MHz] or 125 [kHz].
z] is used, and the communication distance is on the order of several centimeters because of the weak radio communication whose output is limited. When performing bidirectional data communication, the user needs to bring the clock 11 close to the antenna 17. There is.

[1.3] Schematic Configuration of Wrist Watch FIG. 3 shows a schematic configuration block diagram of a wristwatch-type information device.
The wristwatch 11 includes an antenna 21, a switching circuit 22, a receiving circuit 23, a transmitting circuit 24, and a central control circuit 25. The switching circuit 22 includes an antenna 21
Is switched between the receiving circuit 23 and the transmitting circuit 24.
The reception circuit 23 demodulates a signal from the external transmission / reception device 12 received via the antenna 21 based on an oscillation signal SVCO from a transmission circuit described later and outputs the demodulated signal to the central control circuit 25 as reception data DRX. The transmission circuit 24 receives the synthesizer control signal SS input from the central control circuit 25.
The transmission data DTX input from the central control circuit 25 is modulated based on Y and transmitted to the external transmission / reception device 12 via the antenna 21. Central control circuit 25 controls entire watch 11.

The wristwatch 11 further includes a sounding section 26, a driving circuit 26D, a vibration notifying section 27, a driving circuit 27D,
A light emission notification unit 28, a drive circuit 28D, a display unit 29,
Drive circuit 29D, external operation input unit 30, oscillator 31
A reference signal creation circuit 32, a non-volatile memory 33,
And a battery 34. The sounding unit 26
Driven by the drive circuit 26D under the control of the central control circuit 25, the buzzer and electronic sound notify the user of various states. The vibration notification unit 27 is driven by the drive circuit 27D under the control of the central control circuit 25, and notifies the user of various states by vibration. The light emission notifying unit 28 includes a light emitting element such as an LED, and the drive circuit 28
D drives to notify the user of various states by light. The display unit 29 is configured by a liquid crystal display panel or the like, and is driven by a drive circuit 29D under the control of the central control circuit 25 to display various information. The external operation unit includes buttons, a touch panel, and the like, and allows the user to perform various operations. The reference signal creation circuit 32 creates and outputs various reference signals based on the source oscillation signal generated by the oscillator 31. The nonvolatile memory 33 stores various data in a nonvolatile state. The battery 34 supplies power to the wristwatch-type information device 12.

In this case, the power supply of the wristwatch 11 is
Normally, it is supplied from the battery 34,
In the case where data communication is performed between the communication device and the communication device, a carrier wave (carrier signal) transmitted from the external transmission / reception device 12 can be rectified and used as a driving power source, similarly to a general non-contact IC card. . Further, the central control circuit 25 can incorporate an encryption circuit for encrypting data as necessary. Further, the non-volatile memory 33 has an EEPR
The wristwatch 1 is composed of an OM, a flash memory, and the like.
Various data such as 1 unique ID number and received data are stored.

[1.4] Configuration of Receiving Circuit and Transmitting Circuit By the way, the above-described antenna 21, switching circuit 22, receiving circuit 23 and transmitting circuit 24 are composed of transmitting circuit 14, receiving circuit 15, and high-frequency circuit in external transmitting / receiving apparatus 12. 16 and an antenna 17 are realized.
Therefore, the antenna 21, the switching circuit 22, the receiving circuit 23, and the transmitting circuit 24 will be described in more detail. FIG. 4 shows a schematic block diagram of an antenna, a switching circuit, a receiving circuit, and a transmitting circuit. The antenna 21 is the antenna body 2
1A and an antenna filter 21B. The antenna filter 21B removes unnecessary components from a signal input from the antenna 21 or a signal output to the antenna 21. The receiving circuit 23
Amplifier 23A, Buffer Amplifier 23B, Mixer 23
C, bandpass filter 23D, IF amplifier 23E
, A demodulation circuit 23F, a baseband amplifier 23G,
And a detection circuit 23H.

The RF amplifier 23A performs high-frequency amplification on a signal input from the antenna 21 and outputs the amplified signal to the mixer 23C. The buffer amplifier 23B amplifies the oscillation signal SVCO and outputs the amplified signal to the mixer 23C. The mixer 23C has an R
Oscillation signal SVC amplified to output signal of F amplifier 23A
O is mixed and output to the bandpass filter 23D. The bandpass filter 23D allows only a signal of a desired frequency band among the output signals of the mixer 23C to pass therethrough and outputs the signal to the IF amplifier 23E. IF amplifier 23E performs intermediate frequency amplification of the output signal of bandpass filter 23D, and outputs the result to baseband amplifier 23G. Demodulation circuit 23F
Demodulates the output signal of the IF amplifier 23E and outputs it to the baseband amplifier 23G. Baseband amplifier 23
G performs baseband amplification of the output signal of the demodulation circuit 23F and outputs the signal to the detection circuit 23H.

The detection circuit 23H includes a baseband amplifier 2
The 3G output signal is detected and output to the central control circuit 25 as received data DRX. The transmission circuit 24 is a PLL
The circuit includes a circuit 24A, a low-pass filter 24B, an IF amplifier 24C, a low-pass filter 24D, a voltage-controlled oscillator (VCO) 24E, and a power amplifier 24F. The PLL circuit 24A includes the central control circuit 2
5 generates a carrier signal of a predetermined frequency based on the synthesizer control signal SSY from the low-pass filter 24.
Output to B. The low-pass filter 24B passes only a low-frequency component of the carrier signal output from the PLL circuit 24A and outputs the carrier signal to the voltage-controlled oscillator 24E. IF amplifier 24
C performs intermediate frequency amplification of the transmission data DTX from the central control circuit 25 and outputs the result to the low-pass filter 24D.

The low-pass filter 24D is connected to the IF amplifier 2
Only the low frequency component of the output signal of 4C is passed and output to the voltage controlled oscillator 24E. The voltage controlled oscillator 24E modulates the transmission data DTX based on the output signal of the low-pass filter 24B and the output signal of the low-pass filter 24D, and outputs the result to the power amplifier 24F. Power amplifier 2
4F amplifies the output signal of voltage controlled oscillator 24E and outputs it as a transmission signal via switching circuit 22 and antenna 21.

[1.5] Configuration around Display Unit FIG. 5 shows a configuration around the display unit. FIG. 5A is a front view of the configuration around the display unit, and FIG. 5B is a side view of the configuration around the display unit. The liquid crystal display panel 2 which is connected to the circuit board 40 by the conduction terminal 29B around the display section and constitutes the display section
9A and E for illuminating the liquid crystal display panel 29A from the back side.
L (electro luminescent) sheet 29C, antenna 21 formed and arranged as a loop antenna on circuit board 40 so as to surround liquid crystal display panel 29A, receiving circuit 23, transmitting circuit 24, central control circuit 25, and driving circuit The IC 41 including the 26D, 27D, 28D, and 19D, the nonvolatile memory 33, and the like, and the battery 34 disposed on the back side of the circuit board 40 are disposed. In this case, the reason why the antenna 21 is arranged on the circuit board 40 so as to surround the liquid crystal display panel 29A is that the larger the opening area of the loop antenna is, the more the antenna gain is improved. This is because it is preferable to form them.

As described above, since the communication distance is short, the antenna 21 is provided on the dial side of the clock relative to the circuit board 40, that is, on the side on which the liquid crystal display panel 29A is disposed (hereinafter, for convenience, the dial side). Of the liquid crystal display panel 29A and the antenna 21.
Means that they are arranged close to each other. Here, the number of turns of the loop antenna is about several turns when the frequency of the short wave band of 13.56 [MHz] is used for communication.
When a long wave band of 5 [kHz] or 134 [kHz] is used, it takes several tens of turns. In the case where the number of turns is several tens of turns as in the case of using a long wave band, it is difficult to form a loop antenna with a copper foil pattern on the circuit board 40 in terms of area. (B) Antenna 21
As shown by A, a loop antenna is formed three-dimensionally by winding a copper wire or the like.

[1.6] Operation of First Embodiment Next, the operation of the first embodiment will be described. First, the general operation will be described with reference to the timing chart of FIG. The external transmission / reception device 12 transmits a polling signal (communication request) at every predetermined timing (step S1).
01), when the wristwatch 11 enters the communication area, the wristwatch 11 stops displaying, starts communication, and transmits data for mutual authentication to the external transmission / reception device 12 (step S102). As a result, the period shifts to the mutual authentication period, and the external transmission / reception device 12 places the watch 1 within its own communication range.
1 is detected, and data for mutual authentication is transmitted to the wristwatch 11 (step S103). The wristwatch 11 that has received the data for mutual authentication from the external transmitting / receiving device 12 transmits response data to the effect that the mutual authentication has been completed to the external transmitting / receiving device 12 (step S104).

As a result, the process proceeds to the reading period, and the external transmitting / receiving device 12 transmits read request data to read data from the wristwatch 11 (step S105).
Thereby, the wristwatch 11 reads the corresponding data from the memory address of the nonvolatile memory corresponding to the read request data, and transmits the data to the external transmitting / receiving device 12 (step S106). As a result, the external transmission / reception device 12 shifts to the determination period, and recognizes and determines the data type such as the ticket and the prepaid card and the validity period from the transmitted data (step S107). And the external transmitting and receiving device 1
2 shifts to the writing period and transmits data that needs updating, such as balance data, to the wristwatch 11 (step S10).
8). Thereby, watch 11 transmits response data corresponding to the fact that the data has been received to external transmission / reception device 12 (step S109).

Thus, the communication is completed and the watch 11
Shifts to the internal processing period, writes to the corresponding memory address of the nonvolatile memory,
Confirms that the transmission of data to the wristwatch 11 has been completed, and prepares for the next polling process (step S110). In this case, the display of the wristwatch 11 remains stopped during the mutual authentication period, the reading period, the determination period, the writing period, and the internal processing period. FIG. 8 shows a specific processing flowchart. In this case, it is assumed that the wristwatch 11 does not start signal transmission spontaneously, but performs transmission for reply only after receiving a polling signal from the external transmission / reception device 12. When the user passes through the gate G (see FIG. 2), the dial side of the wristwatch 11 is brought close to the loop antenna 17 (step S1). On the other hand, the wristwatch 11 determines whether or not a polling signal transmitted by the start-stop synchronization protocol has been received from the antenna 17 of the external transmission / reception device 12 at every predetermined timing (step S2).

More specifically, the control device 13 of the external transmission / reception device 12 causes the transmission circuit 14 to generate a polling signal, and continues to transmit the polling signal via the high-frequency circuit 16 and the antenna 17. On the other hand, the wristwatch 11 has an antenna body 21A of the antenna 21 and an antenna filter 2
The polling signal is input to the receiving circuit 23 via the switching circuit 1B and the switching circuit 22. RF amplifier 23 of receiving circuit 23
A performs high-frequency amplification on a signal input from the antenna 21 and outputs the amplified signal to the mixer 23C. On the other hand, the buffer amplifier 23B amplifies the oscillation signal SVCO and
Output C. As a result, the mixer 23C mixes the output signal of the RF amplifier 23A with the amplified oscillation signal SVCO and outputs the mixed signal to the bandpass filter 23D. The bandpass filter 23D outputs the desired frequency out of the output signal of the mixer 23C. IF signal 23
Output to E.

The IF amplifier 23E amplifies the intermediate frequency of the output signal of the band-pass filter 23D, and
F, the demodulation circuit 23F demodulates the output signal of the IF amplifier 23E and outputs it to the baseband amplifier 23G. The baseband amplifier 23G performs baseband amplification of the output signal of the demodulation circuit 23F and outputs the signal to the detection circuit 23H. As a result, the detection circuit 23H detects the output signal of the baseband amplifier 23G and outputs it to the central control circuit 25 as reception data DRX corresponding to the polling signal. As a result, the central control circuit 25 can determine that the polling signal has been received. According to the above-described procedure, when the polling signal is not received in the determination in step S2 (step S2; No), the standby state is set, and the time is displayed on the liquid crystal display panel 29A. FIG. 9 shows an example of driving signals when the liquid crystal display panel 29A is statically driven. More specifically, as shown in FIG. 9, the control signal S is at the “L” level until time t1, and the voltage waveform of the common electrode output from the drive circuit 29D is 0 [V] and + E. It has a rectangular pulse waveform that transitions between [V].

Similarly, the voltage waveform of the segment electrode is a rectangular pulse waveform that transitions between 0 [V] and + E [V], and its phase is 180 ° with the voltage waveform of the common electrode.
[゜] Deviated. That is, in the case of the static driving, the segment is turned on when the potential difference applied between the common electrode and the segment electrode of the liquid crystal display panel 29A is equal to or larger than the predetermined potential difference. In this case, if a DC voltage is continuously applied to the liquid crystal, an electrochemical reaction occurs and the characteristics are deteriorated. Therefore, an AC waveform is applied as shown in FIG. However, since an AC waveform is applied, electromagnetic noise is generated from the charge / discharge current of the liquid crystal display panel 29A and the booster circuit built in the drive circuit 29D,
This noise has a bad effect when data communication is performed in parallel.

As described above, the phase of the voltage waveform of the common electrode and the phase of the voltage waveform of the segment electrode are 180
Until the time t1, the voltage waveform of the voltage applied between the common electrode and the segment electrode is a rectangular pulse that transitions between -E [V] and + E [V] because it is shifted by [゜]. The waveform has a waveform, and the segments of the liquid crystal display panel 29A are turned on, and the time is displayed. If the polling signal is received in the determination of step S2 (step S2; Yes), the central control circuit 25
Changes the control signal S output to the drive circuit 29D to "L".
The level is set, and the clock display is stopped (step S3).
More specifically, as shown in FIG. 9, after reaching time t1, the control signal S becomes “H” level, and the drive circuit 29D
Has a voltage waveform of 0 [V] output from the common electrode.

Similarly, the voltage waveform of the segment electrode is also 0 [V]. As a result, when the transition to the time t1 occurs, the potential difference of the voltage applied between the common electrode and the segment electrode is reduced. Disappears and is fixed at 0 [V]. As a result, the time is not displayed on the liquid crystal display panel 29A. Subsequently, the external transmitting / receiving device 12 and the wristwatch 11
After performing mutual authentication, the external transmitting / receiving device 12
The D number NID is confirmed (step S4). More specifically, the control device 13 of the external transmitting / receiving device 12
The watch 11 is requested to transmit the ID number NID of No. 1. That is, the control device 13 of the external transmission / reception device 12 transmits an ID information request signal to the wristwatch 11 as a transmission signal via the transmission circuit 14, the high-frequency circuit 16, and the antenna 17. On the other hand, watch 11
The ID information request signal is input to the receiving circuit 23 via the antenna body 21A of the antenna 21, the antenna filter 21B, and the switching circuit 22. Thereby, the receiving circuit 2
The third RF amplifier 23A performs high-frequency amplification of a signal input from the antenna 21 and outputs the amplified signal to the mixer 23C.

On the other hand, the buffer amplifier 23B amplifies the oscillation signal SVCO and outputs the amplified signal to the mixer 23C. As a result, the mixer 23C mixes the amplified oscillation signal SVCO with the output signal of the RF amplifier 23A and outputs the mixed signal to the bandpass filter 23D.
Of the output signal of the mixer 23C, only the signal of the desired frequency band is passed and output to the IF amplifier 23E. IF
The amplifier 23E amplifies the intermediate frequency of the output signal of the bandpass filter 23D and outputs it to the demodulation circuit 23F. The demodulation circuit 23F demodulates the output signal of the IF amplifier 23E and outputs it to the baseband amplifier 23G. The baseband amplifier 23G performs baseband amplification of the output signal of the demodulation circuit 23F and outputs the signal to the detection circuit 23H. As a result, the detection circuit 23H detects the output signal of the baseband amplifier 23G and outputs it to the output central control circuit 25 as reception data DRX corresponding to the ID information request signal.

As a result, the central control circuit 25 reads the ID number NID from the nonvolatile memory 33, and
The transmission data DTX corresponding to the ID is output to the IF amplifier 24C. IF amplifier 24C performs intermediate frequency amplification of transmission data DTX, and outputs the result to low-pass filter 24D. The low-pass filter 24D allows only the low-frequency component of the output signal of the IF amplifier 24C to pass, and
Output to Further, the central control circuit 25 outputs a synthesizer control signal SSY to the PLL circuit 24A. PL
The L circuit 24A generates a carrier signal of a predetermined frequency based on the synthesizer control signal SSY and outputs the carrier signal to the low-pass filter 24B. The low-pass filter 24B has P
Only the low frequency component of the carrier signal output from the LL circuit 24A is passed and output to the voltage controlled oscillator 24E. As a result, the voltage-controlled transmitter 24E is connected to the low-pass filter 2
The transmission data DTX is modulated based on the output signal of 4B and the output signal of the low-pass filter 24D, and outputs the result to the power amplifier 24F. The power amplifier 24F amplifies the output signal of the voltage controlled oscillator 24E and outputs the ID number NID as a transmission signal via the switching circuit 22 and the antenna 21.
Is transmitted to the external transmission / reception device 12.

As a result, when the wristwatch ID is confirmed on the side of the external transmission / reception device 12, the actual data transmission / reception required for confirming the entrance / exit is performed in the same procedure as described above (step S5). When the data transmission / reception is completed, the central control circuit 25 writes the data after the necessary flag change and the prepaid fee settlement processing into the non-volatile memory 33 when entering / leaving (step S).
6). When the data writing is completed, the central control circuit 25 sets the control signal S to the "H" level again to turn on the liquid crystal display panel 29A (step S7). As described above, the liquid crystal display panel 29A
Is off and the clock display is stopped, the central control circuit 25 continues the timekeeping operation,
The correct time will be displayed immediately. In the case of the entrance / exit management system described as an example above, the time required for a series of data communication processing from the reception of the polling signal to the writing of data to the nonvolatile memory of the wristwatch is approximately 20 hours.
It is within 0 [msec], and there is no practical problem.

[1.7] Effect of First Embodiment As described above, according to the present embodiment, the display on the display unit is stopped at the timing of performing data communication. The data communication is not affected by the noise generated, so that the communication sensitivity of the non-contact IC card circuit can be reduced, the communication distance can be shortened, and the occurrence of communication errors can be suppressed.

[2] Second Embodiment Next, a second embodiment of the present invention will be described. In the second embodiment, since the configuration of the data communication system is the same as that of the first embodiment, the configuration of the wristwatch will be mainly described. [2.1] Schematic Configuration of Wrist Watch FIG. 10 shows a schematic configuration block diagram of a wristwatch-type information device. The wristwatch 70 includes an antenna 71, a power supply circuit 72,
The carrier detection circuit 73 and ASK (Amplitude Shift k)
eying) a demodulation circuit 74, an ASK modulation circuit 75, a clock generation circuit 76, an IC card control circuit 77, and a nonvolatile memory 78. Here, ASK (Am
(Plitude Shift keying) demodulation circuit 74, ASK modulation circuit 75, clock generation circuit 76, IC card control circuit 7
7 and the non-volatile memory 78 constitute an IC card unit 79. The power supply circuit 72 rectifies the electric current received by the radio wave and supplies the rectified electric current as driving power for the IC card unit 79 during the transmission / reception operation. The carrier detection circuit 73 detects whether a carrier signal having a predetermined frequency as an external radio wave is detected, that is, whether transmission to the wristwatch 70 is being performed.

ASK demodulation circuit 74 demodulates a signal received from the outside and outputs it as received data DRX. AS
K modulation circuit 75 amplitude-modulates transmission data DTX and outputs the result as a transmission signal. The clock generation circuit 76 generates and outputs a high-frequency clock signal from the frequency of the received radio wave carrier signal. The IC card control circuit 77
An encryption processing circuit 77A that performs encryption and decryption while controlling the entire C card unit 79 is provided, and performs decryption of encrypted received data and encryption of data to be transmitted. The non-volatile memory 78 stores various data in a non-volatile manner. In this case, in order to ensure security, data having a monetary value (so-called value) and important data are stored in an encrypted state, and are decrypted in the encryption processing circuit 77A only during processing. ing. The wristwatch 70 further includes a sounding unit 26, a driving circuit 26D, a vibration notification unit 27, a driving circuit 27D, a light emission notification unit 28, and a driving circuit 28D.
, A display unit 29, a drive circuit 29D, an external operation input unit 30, an oscillator 30, a reference signal generation circuit 32, a battery 34, and a clock control circuit 35.

Here, the driving circuit 26D and the driving circuit 27
D, the drive circuit 28D, the drive circuit 29D, the reference signal creation circuit 32, and the clock control circuit 35,
0. The sounding section 26 includes a clock control circuit 35.
Vibration notification unit 2 driven by the drive circuit 26D under the control of the user to notify the user of various states by a buzzer or an electronic sound.
7 is driven by the drive circuit 27D under the control of the clock control circuit 35, and notifies the user of various states by vibration. The light emission notification unit 28 is driven by the drive circuit 28D under the control of the clock control circuit 35, and notifies the user of various states by light. The display unit 29 is driven by the drive circuit 29D under the control of the clock control circuit 35, and displays various information. The external operation input unit 30 performs various operations by the user, and notifies the clock control circuit of the operation state. The reference signal creation circuit 32 creates various reference signals based on the oscillation signal generated by the oscillator 31 and outputs the reference signal to the clock control circuit 35. The battery 34 includes a notification / timekeeping controller 80, a sounder 2
6. The power supply for driving is supplied to the vibration notification unit 27, the light emission notification unit 28, the display unit 29, and the external operation input unit 30.

[2.2] Operation of Second Embodiment Next, the operation of the second embodiment will be described. Since the outline operation is the same as that of the first embodiment, a specific process will be described again with reference to FIG. In this case, since the IC card unit 79 of the wristwatch 70 is not normally supplied with power, the power is supplied from the power supply circuit 72 only after receiving the polling signal from the external transmission / reception device 12 so that the transmission is started. It is configured. When the user passes through the gate G (see FIG. 2), the dial side of the wristwatch 70 is brought close to the loop antenna 17 (step S1). At this time, the clock control circuit 35 determines whether or not the polling signal transmitted by the start-stop synchronization protocol from the antenna 17 of the external transmission / reception device 12 is received based on whether the carrier signal is detected by the carrier detection circuit 73. It has been determined (step S2). Step S
If the polling signal is not received in the determination of Step 2 (Step S2; No), the apparatus enters a standby state, and the time is displayed on the liquid crystal display panel 29A.

If it is determined in step S2 that a polling signal has been received (step S2; Ye
s) The central control circuit 25 sets the control signal S output to the drive circuit 29D to the “L” level, and stops the clock display (step S3). As a result, the liquid crystal display panel 29
A does not display the time. On the other hand, the external transmission / reception device 12 and the wristwatch 11 perform mutual authentication, and the external transmission / reception device 12 confirms the ID number NID of the wristwatch 11 (step S4). More specifically, the external transmitting / receiving device 1
The second control device 13 requests the wristwatch 11 to transmit the ID number NID of the wristwatch 11. That is, the control device 13 of the external transmitting / receiving device 12
4. An ID information request signal is transmitted to the wristwatch 11 as a transmission signal via the high frequency circuit 16 and the antenna 17. On the other hand, the power supply circuit 72 rectifies the alternating current flowing by the received electric power of the radio wave and supplies the rectified current to the IC card unit 79. As a result, the ASK demodulation circuit 74 demodulates the ID information request signal and outputs the corresponding reception data DRX to the IC card control circuit 77. As a result, the IC card control circuit 77 reads the ID number NID from the non-volatile memory 78 and transmits the transmission data DTX corresponding to the ID number NID.
Is output to the ASK modulation circuit 75. ASK modulation circuit 75
Performs amplitude modulation of the transmission data DTX and transmits a response signal corresponding to the ID number NID to the external transmission / reception device 12 via the antenna 71 as a transmission signal.

As a result, when the wristwatch ID is confirmed on the side of the external transmission / reception device 12, the actual data transmission / reception required for confirming the entrance / exit is performed in the same procedure as in the case described above (step S5). When the data transmission / reception is completed, the central control circuit 25 writes the data after the necessary flag change and the prepaid fee settlement processing into the non-volatile memory 78 when entering / leaving (step S).
6). When the data writing is completed, the IC card control circuit 77 enters a standby state. On the other hand, when data transmission / reception is completed, the carrier signal is no longer detected by the carrier detection circuit 73.
Sets the control signal S to the "H" level again to turn on the liquid crystal display panel 29A (step S7).
Then, if necessary, the clock control circuit 35 supplies the power supply and the clock signal CLK to the IC card unit 79 to transmit and receive data from the nonvolatile memory 78 via the IC card control circuit 77 including the encryption processing circuit 77A. The updated data is read out and stored in a RAM (not shown) in the clock control circuit 35. Then, the driving circuit 29D is controlled based on the read data, and the updated data is displayed on the display unit 29.

[2.3] Effect of Second Embodiment As described above, according to the second embodiment, the display on the display unit is stopped at the timing of performing data communication. Data communication is not affected by noise from the unit, and it is possible to suppress the deterioration of the communication sensitivity of the non-contact IC card circuit, the shortening of the communication distance, and the occurrence of communication errors. Further, data transmission and reception in the IC card unit is performed by the external external transmitting / receiving device 1.
Since the operation is performed using the power of the radio wave transmitted from the second wristwatch 2, it is possible to reduce the power consumption and extend the operating life of the entire wristwatch.

[2.4] Modification of Second Embodiment [2.4.1] First Modification In the above description, it is assumed that the IC card unit 79 is transmitting and receiving data. , And the updated data is displayed on the display unit. However, only when the data display button provided on the external operation input unit 30 is operated, the power is supplied to the IC.
It is also possible to adopt a configuration in which the data is supplied to the card unit 79, the data is read from the nonvolatile memory 78, and the data is displayed.

[2.4.2] Second Modification In the above description, the configuration has been adopted in which the IC card unit 79 detects, via the carrier detection circuit 73, that data is being transmitted and received. IC card control circuit 77
Has started operation, an input / output terminal (I / I) connecting the IC card control circuit 77 and the clock control circuit 35.
If the display is stopped based on the voltage level of the predetermined signal line O), it is not necessary to provide the carrier detection circuit 73, and the circuit configuration can be simplified. Also in this case, only when the data display button provided on the external operation input unit 30 is operated, the power is supplied to the IC card unit 79, the data is read from the nonvolatile memory 78, and the display is performed. do it.

[3] Modification of Embodiment [3.1] First Modification As described above, in the present embodiment, data communication is performed while the wristwatch 11 is worn on the wrist.
When the display disappears, the user cannot see the display unit 29, and the user does not feel any trouble. For this reason, the time display is restarted after the data has been written into the nonvolatile memory. However, in a system in which the amount of communication data is large and the transmission / reception time is long, the time display may be restarted before writing to the nonvolatile memory.

[3.2] Second Modification In the above description, the clock display is stopped until all data transmission / reception and writing to the memory are completed. However, the communication data amount is large and the transmission / reception time is long. In such a system, it is possible to configure so that data communication and non-display of data are alternately repeated. More specifically, as shown in the processing flowchart of FIG.
When the user passes through the gate G (see FIG. 2), the dial side of the wristwatch 11 is brought close to the loop antenna 17 (step S11). On the other hand, the wristwatch 11 determines whether or not a polling signal transmitted by the start-stop synchronization protocol has been received from the antenna 17 of the external transmission / reception device 12 at every predetermined timing (step S12). If the polling signal is not received in the determination in step S12 (step S12; No), the standby state is entered, and the time is displayed on the liquid crystal display panel 29A.

If it is determined in step S12 that a polling signal has been received (step S12; Y
es), the central control circuit 25 sets the control signal S output to the drive circuit 29D to the “H” level, and stops the clock display (step S13). Then, a part of the data is transmitted and received (step S14). Then, when the data transmission / reception of a part of the data is completed, the central control circuit 25
The data is written to the nonvolatile memory 33 (Step S15). Then, when the data writing is completed, the central control circuit 25 sets the control signal S to the “H” level again, turns on the liquid crystal display panel 29A, and resumes the clock display (step S16). Then, it is determined whether or not all data has been received (step S17), and if all data has been received (step S17; Yes), the process is terminated. Also,
If it is determined in step S17 that all data has not been received (step S17; No),
The process returns to step S13, and the same process is repeated. As a result, the user can perform data communication without noticing the stop of the clock display due to the data transfer.

[3.3] Third Modification FIG. 12 shows a third modification of the embodiment. The third modification is different from the embodiment of FIG. 3 in that a driving power source for an IC card function unit for realizing a non-contact type IC card function is obtained by rectifying a carrier signal of a reception signal from an external transmitting / receiving device. And an encryption processing circuit for performing data encryption processing is provided. IC card function part 5 of watch 11
0 denotes an antenna 21, a tuning capacitor 51, a rectifier circuit 52, a demodulator 54, a modulator 55, a reference signal generator 56, and a parallel / serial bidirectional converter (SP /
(PS conversion section) 57, a radio section central control circuit 58, a non-volatile memory 59, and an encryption processing circuit 60.

The antenna 21 is formed as a loop antenna. The tuning capacitor 51 is connected to the antenna 21
Cooperates with to function as a tank circuit. The rectifier circuit 52 rectifies the carrier signal of the received signal received from the external transmission / reception device 12 and supplies the rectified carrier signal to the power supply unit 53 as power. The demodulation unit 54 demodulates the digitally modulated reception signal input via the antenna 21 and converts the received signal into a serial format reception data DSRX.
Output to the serial bidirectional converter 57. The modulation unit 55
The input serial transmission data DSTX is digitally modulated and transmitted to the external
Send to The reference signal generation circuit 56 generates a reference signal (reference clock signal) synchronized with the carrier signal, and outputs the generated reference signal to the parallel / serial bidirectional conversion unit 57 and the radio unit central control circuit 58.

Parallel / serial bidirectional converter 57
Converts the received data DSRX into a parallel-format received data DPR by performing a serial / parallel conversion based on the reference signal.
Output to the radio unit central control circuit 58 as X,
The parallel transmission data DPTX input from the radio unit central control circuit 58 is converted from parallel to serial data and output to the modulation unit 55 as serial transmission data DSTX. The wireless section central control circuit 58 is provided with the IC card function section 5
In addition to controlling the entirety of the wristwatch 11, various data including the reception data DRX and the transmission data DTX is exchanged with the central control circuit 25 that controls the entire wristwatch 11. The non-volatile memory 59 stores various data. The encryption processing circuit 60 performs an encryption process on various data input from the wireless unit central control circuit 58 and stores the data in the nonvolatile memory 59, and also stores data that needs to be processed by the wireless unit central control circuit 58 and the like. It is read from the sex memory 59, decoded, and output.

Next, the general operation will be described. The rectifier circuit 52 of the IC card function unit 50 rectifies the carrier signal of the received signal received from the external transmitting / receiving device 12 and
3 as power, and as a result, the power-supplied unit 53 starts operating. When power is supplied, the reference signal generation circuit 56 generates a reference signal (reference clock signal) synchronized with the carrier signal, and outputs the reference signal to the parallel / serial bidirectional conversion unit 57 and the radio unit central control circuit 58. The demodulation unit 54 also receives an ASK (Amplitude) signal transmitted from the external transmission / reception device 12 as an induced magnetic field.
Shift Keying), FSK (Frequen)
A polling signal (communication request signal) digitally modulated by a modulation method such as cy Shift Keying is demodulated and output to the parallel / serial bidirectional conversion unit 57 as serial format reception data DSRX. The parallel / serial bidirectional converter 57 converts the received data DSRX from serial to parallel based on the input reference signal, and outputs the received data DSRX to the radio unit central control circuit 58 as parallel received data DPRX.

When receiving the reception data DPRX corresponding to the polling signal, the radio section central control circuit 58 communicates with the external transmission / reception apparatus 12 via the parallel / serial bidirectional conversion section 57, the modulation section 55, the antenna 21, and the demodulation section 54. After the mutual authentication is performed, the data is read out from the memory address of the nonvolatile memory 59 specified by the external transmission / reception device 12 via the encryption processing circuit 60. In this case, since the data is for transmission to the external transmission / reception device, the encryption processing circuit 60 does not perform the decryption. The read data is output to the parallel / serial bidirectional conversion unit 57 as transmission data DPTX in synchronization with the reference signal by the radio unit central control circuit 58. The parallel / serial bidirectional conversion unit 57 converts the transmission data DPTX from parallel / serial to serial transmission data DSTX.
And outputs the result to the modulation section 55. The modulation section 55 controls the resonance state of the tank circuit formed by the antenna 21 and the tuning capacitor 51 based on the transmission data DSTX so as to change the resonance state, and transmits the data to the external transmission / reception device 12 side.

[3.4] Fourth Modification In the above description, the operation of the drive circuit was stopped when the display on the display unit was stopped. However, the input of the drive control signal for controlling the drive circuit was not performed. The central control may be configured so that the control is performed using a microprocessor unit (MPU) and the control is performed by a control program stored in a memory such as a RAM or a ROM. Further, it is also possible to configure so as to prohibit the input of the boosting clock of the boosting circuit portion of the driving circuit.

[3.5] Fifth Modification In the above description, the method of two-way wireless communication is not mentioned, but any method capable of performing local communication of about 1 m to 10 m may be used. . For example, 2.45
"BlueTooth" which uses the radio frequency band of GHz
Such a communication protocol may be used.

[3.6] Sixth Modification In the above description, a wristwatch-type information device has been described as an example of a portable wireless communication device. However, any device that can be worn by a user, such as a necklace type or a pendant type, may be used. Various modes are possible.

[3.7] Seventh Modification In the above description, the control program for each external transmission / reception device or wristwatch-type information device has been described as being previously installed in the ROM or the RAM. However, semiconductor memory, CD, CD-
R, DVD (Digital VersatileDisk), DVD-R
(DVD-Rewritable), DVD-RAM (DVD-Ra
Optical disks such as ndomAccess Memory, MO (Magneto-O)
ptical), magneto-optical disks such as MD (Mini Disk),
The control program is stored on a recording medium capable of recording the control program including a magnetic disk such as a hard disk or a flexible disk, and the memory (a rewritable ROM or a rewritable ROM or RAM) and an MPU (Micro Processor Unit) that controls an external transmission / reception device or a wristwatch-type information device may operate based on a control program.

It is also possible to distribute the control program to an external transmitting / receiving device or a wristwatch-type information device via a network including the Internet, a dedicated line (wireless and wired), and a public line (wireless and wired). In this case, the control program distributed to the memory (rewritable ROM or RAM) of the external transmitting / receiving device or the wristwatch-type information device is installed, and the MPU controlling the external transmitting / receiving device or the wristwatch-type information device is based on the control program. What is necessary is just to perform operation | movement.

[0065]

According to the present invention, since the display on the display unit is stopped at the time of performing data communication, the data communication is not affected by noise coming from the display unit, and the communication sensitivity is reduced. Deterioration, shortening of communication distance, and occurrence of communication errors can be suppressed, and stable communication characteristics can be obtained.

[Brief description of the drawings]

FIG. 1 is a schematic configuration block diagram of a data communication system according to an embodiment.

FIG. 2 is an external perspective view of the gate when an external transmitting / receiving device is installed on the gate for easily managing entrance / exit.

FIG. 3 is a schematic block diagram of a wristwatch-type information device according to the first embodiment.

FIG. 4 is a schematic block diagram of a receiving circuit and a transmitting circuit.

FIG. 5 is an explanatory diagram of a configuration around a display unit.

FIG. 6 is a diagram illustrating another configuration around the display unit.

FIG. 7 is a schematic timing chart of the data communication system of the embodiment.

FIG. 8 is a processing flowchart of the embodiment.

FIG. 9 is an example of a driving signal when a liquid crystal display panel is statically driven.

FIG. 10 is a schematic configuration block diagram of a wristwatch-type information device according to the first embodiment.

FIG. 11 is a processing flowchart of a second modified example of the embodiment.

FIG. 12 is a schematic configuration block diagram of a third modification of the embodiment.

[Explanation of symbols]

 Reference Signs List 10 Data communication system 11, 70 Watch 12 External transmitting and receiving device 13 Control device 14 Transmitting circuit 15 Receiving circuit 16 High frequency circuit 17 Antenna 21, 71 Antenna 22 ... Switching circuit 23... Receiving circuit 24... Transmitting circuit 25... Central control circuit 26... Sounding section 26 D... Drive circuit 27... Vibration notifying section 27 </ b> D Drive circuit 28. Driving circuit 29 Display unit 29D Driving circuit 30 External operation input unit 31 Oscillator 32 Reference signal creation circuit 33 Non-volatile memory 34 Battery 72 Power supply circuit 73 Carrier Detection circuit 74 ASK demodulation circuit 75 ASK modulation circuit 76 Clock generation circuit 77 IC card control circuit 77A Encryption processing circuit 78 Nonvolatile memo 79 ...... IC card section 80 ...... alarm / timing control unit

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 5B035 BB09 CA11 CA23 5K067 AA23 BB21 DD29 DD51 EE02 FF02 FF04 FF23 FF31 KK05 KK13

Claims (21)

[Claims] A wireless communication unit capable of wirelessly communicating with an external device via an antenna; a display unit for displaying various kinds of information by digital control; A portable information device, comprising: a display prohibition unit that prohibits display on the display unit. 2. A wireless communication unit capable of performing wireless communication with an external device via an antenna, a display unit for displaying various information by digital control, and a wireless communication start signal in the wireless communication unit. And a display prohibition unit that prohibits display on the display unit during a data communication period corresponding to the wireless communication start signal when the information is received. 3. The portable information device according to claim 1, further comprising: a control unit configured to alternately perform the data communication in the wireless communication unit and the display on the display unit. Portable information equipment. 4. The portable information device according to claim 1, wherein the display unit includes a display panel unit that actually performs display, and a display drive unit that drives the display panel unit. The portable information device according to claim 1, wherein the display prohibiting unit stops the operation of the display driving unit when prohibiting the display on the display unit. 5. The portable information device according to claim 1, wherein the display unit includes a display panel unit that actually performs display, and the display unit based on an external display control signal. A display drive unit that drives a panel unit, wherein the display prohibition unit prohibits input of the display control signal when prohibiting display on the display unit. 6. The portable information device according to claim 5, wherein the antenna constitutes the wireless communication unit, and is provided on a side of the display panel unit side of a circuit board on which a circuit for performing the wireless communication is mounted. Portable information equipment characterized by the following. 7. The portable information device according to claim 1, wherein the wireless communication unit performs two-way wireless communication with an external device. machine. 8. The portable information device according to claim 1, further comprising: a clock processing unit that performs a clock process; and a battery that supplies power. The display unit includes the clock processing unit. A portable information device that constantly displays a clock by supplying power from the battery under control of the portable information device. 9. The portable information device according to claim 1, wherein the portable information device has a wristwatch shape that can be worn on a user's arm. 10. The portable information device according to claim 1, further comprising: a lighting unit arranged on a rear side or a front side of the display unit to illuminate the display unit; A portable information device, comprising: a lighting prohibition unit that prohibits lighting by the lighting unit during a data communication period in a communication unit. 11. The portable information device according to claim 10, wherein the lighting unit includes an EL lighting device. 12. A method for controlling a portable information device, comprising: a wireless communication unit capable of performing wireless communication with an external device via an antenna; and a display unit for displaying various information by digital control. In the portable information device, it is determined whether or not data communication is being performed in the wireless communication unit, and display on the display unit is prohibited while data communication is being performed in the wireless communication unit. Control method. 13. A method for controlling a portable information device, comprising: a wireless communication unit capable of performing wireless communication with an external device via an antenna; and a display unit for displaying various information by digital control. In the wireless communication unit, it is determined whether or not a wireless communication start signal is received, and when the wireless communication unit receives a wireless communication start signal, during the data communication period corresponding to the wireless communication start signal, the display is performed. A method for controlling a portable information device, comprising prohibiting display in a unit. 14. The control method for a portable information device according to claim 12, wherein the data communication and the display are performed alternately. 15. The portable information device control method according to claim 12, wherein a display driving operation is stopped when displaying on the display unit is prohibited. Information device control method. 16. The control method for a portable information device according to claim 12, wherein when a display on the display unit is prohibited, an external input of a display control signal to the display unit is performed. A method for controlling a portable information device, wherein the method is prohibited. 17. The control method for a portable information device according to claim 12, wherein illumination of the display unit is prohibited. 18. A portable information device having a wireless communication unit capable of performing wireless communication with an external device via an antenna, and a display unit for displaying various information by digital control is controlled. A computer for determining whether or not data communication is being performed in the wireless communication unit, and prohibiting display on the display unit during data communication in the wireless communication unit. A recording medium characterized by recording a program for causing the recording medium to be executed. 19. A portable information device having a wireless communication unit capable of performing wireless communication with an external device via an antenna and a display unit for displaying various information by digital control is controlled. A recording medium storing a program for causing a computer to determine whether or not a wireless communication start signal has been received in the wireless communication unit; and in the wireless communication unit, when the wireless communication start signal has been received, starting the wireless communication. A recording medium recording a program for prohibiting display on the display unit during a data communication period corresponding to a signal. 20. A portable information device having a wireless communication unit capable of performing wireless communication with an external device via an antenna and a display unit for displaying various information by digital control is controlled. A program for determining whether or not data communication is being performed in the wireless communication unit, and prohibiting display on the display unit while data communication is being performed in the wireless communication unit. A program characterized by: 21. A portable information device including a wireless communication unit capable of performing wireless communication with an external device via an antenna, and a display unit for displaying various information by digital control. A program for causing a computer to determine whether or not a wireless communication start signal has been received by the wireless communication unit, wherein the wireless communication unit corresponds to the wireless communication start signal when the wireless communication start signal is received. During the data communication period, the display on the display unit is prohibited.