JP2003163759A - Portable terminal device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve handleable property and operability by eliminating the necessity to carry an electronic flash and further to reduce the fluctuation of a battery voltage by preventing a radio communication operation period from being overlapped with the period of power feeding operation to an electronic flash part or with the period of the image pickup display operation of a camera. <P>SOLUTION: A camera 23 and an electronic flash circuit 30 are built in the device. Besides, before the charging operation start of the electronic flash circuit 30 and during a period of charging operation, a request of call originating/terminating or position registration/hand-over is monitored by a timing control function 20c so that the charging operation period of a capacitor 33 in the electronic flash circuit 30 can not be overlapped with the wireless transmitting operation period based on call originating/terminating or position registration/ hand-over. When such a request is detected, the charging operation is stopped and call originating/terminating or position registration/hand-over is controlled. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile phone and a personal digital assistant (PDA: Personal Digital Assistant).
s) and PHS (Personal Handyphone System) terminals and the like, and more particularly to a mobile terminal device having a camera function.

[0002]

2. Description of the Related Art In recent years, mobile phones, personal digital assistants, PH
Mobile terminal devices represented by S terminals and the like are rapidly spreading, and as one of them, mobile terminal devices having a camera function have been developed. This type of mobile terminal device has, for example, a CCD (Charge Coupled Dev
ice) and CMOS (Complementary Metal Oxide Semicon)
A camera using a solid-state image sensor such as a ductor) is attached,
Still images or moving images captured by this camera are recorded or transmitted. For example, a user's face or surrounding scenery, brochures, photographs, catalogs, etc. can be transmitted as image information to a communication partner, which is very difficult. It is convenient. However, the number of elements and the sensitivity of the camera are generally limited by the size and price of the mobile terminal device, and it is difficult for the camera alone to obtain a satisfactory quality image at night or in a dark room. .

Therefore, the present inventors have filed Japanese Patent Application No. 2001-17.
As shown in No. 9007, an electronic flash unit (hereinafter abbreviated as a flash unit) is detachably mounted using an earphone jack of a mobile terminal device, thereby enabling a flash photography. If such a configuration is adopted, the flash unit can be attached to the mobile terminal device as needed to perform flash photography, and thus it is possible to obtain an image of satisfactory quality even at night or in a dark room. Become.

[0004]

However, in such a device, the flash unit must be carried separately from the main body of the portable terminal device in preparation for flash photography. Therefore, the flash unit may be lost or damaged, and its handling is extremely troublesome. on the other hand,
If the flash unit is carried while it is attached to the main body of the mobile terminal device, the flash unit can be prevented from being lost. However, the current consumption during flash operation is larger than the current values consumed by other processing units of the mobile terminal, and the generated noise adversely affects the wireless communication function that is the original function of the mobile terminal. Is unfavorable because it may hinder the original operability of the mobile terminal such as sending and receiving calls and emails.

The present invention has been made in view of the above circumstances, and an object thereof is to improve the operability and the operability by eliminating the need to carry a flash unit.
In addition, the wireless communication operation period and the power supply operation period to the flash unit or the image pickup display operation period of the camera do not overlap, thereby reducing the fluctuation of the battery voltage and ensuring the required battery voltage in a stable manner to operate the device. To provide a mobile terminal device with improved reliability.

[0006]

In order to achieve the above object, the first invention is an electronic flash having a camera, a light emitting portion, and a charging / discharging circuit for applying a boosted predetermined light emitting voltage to the light emitting portion. And a request for supplying a charging voltage to a charging / discharging circuit of the electronic flash unit in a portable terminal device having a built-in electronic flash unit. Is provided with a second monitoring means and a control means. The control unit controls the wireless communication operation and the charging voltage so that the wireless communication operation period is different from the charging voltage supply period based on the monitoring results of the first and second monitoring units. Of at least one of the feeding operations of the above.

The following various configurations are conceivable as a specific configuration of the control means. In the first configuration, when a request to start control involving wireless communication operation is detected by the first monitoring means during the charging voltage supply period, at least the charging voltage for the light emitting unit during the wireless communication operation period. To stop the supply of.

In the second configuration, the control start request accompanied by the wireless communication operation during the period of supplying the charging voltage to the light emitting portion is the first request.
When detected by the monitoring means, the start of the wireless communication operation is delayed after the end of the supply of the charging voltage.

In the third structure, when the request for starting the supply of the charging voltage to the light emitting portion is detected by the second monitoring means during the wireless communication operation, the start of the charging voltage supply is started in the wireless communication operation. It will be delayed after the end of the period.

Therefore, according to the present invention, since the electronic flash unit is built in the main body of the portable terminal device, it is not necessary to carry the electronic flash unit separately from the main body of the portable terminal device, which makes the terminal device easy to handle and operate. Can be prevented from deteriorating. Further, it is possible to prevent the wireless communication operation period and the charging voltage supply period for the charge / discharge circuit of the electronic flash portion from overlapping. Therefore, there is no concern that a large amount of power supply current will be temporarily consumed in the mobile terminal device,
This prevents abrupt voltage drop of the battery and guarantees the operation of the CPU in the control circuit.
It is possible to avoid the problem that the power supply noise generated as a result interferes with the wireless signal and prevent the wireless transmission / reception characteristics from deteriorating.

In particular, according to the first configuration, when the control accompanied by the wireless communication operation is requested even during the charging period of the charge / discharge circuit, the charging operation is stopped at that point and the wireless communication operation is performed. Done. Therefore, for example, it is possible to reliably and preferentially execute control involving a wireless communication operation such as call origination, call termination, and location registration / handover.

According to the second configuration, when the execution of the control involving the wireless communication operation is requested during the charging period of the charge / discharge circuit, the start of the control involving the wireless communication operation is delayed,
The control accompanied by the wireless communication operation is started after the completion of charging the charge / discharge circuit. Therefore, the charging of the charge / discharge circuit can be surely completed. That is, it is possible to perform the control giving priority to the charging operation to the flash unit, and further to the imaging operation of the camera.

Further, according to the third configuration, when the charging start request to the charging / discharging circuit is issued during the wireless communication operation period, the start of supplying the charging voltage is delayed after the end of the wireless communication operation period. . Therefore, similar to the first configuration, it is possible to surely end the control without interrupting the control accompanied by the wireless communication operation such as the outgoing call, the incoming call, and the position registration.

Further, in the second configuration, when the charging / discharging circuit is completely charged, the control accompanied by the wireless communication operation is automatically started. Further, in the third configuration, when the control involving the wireless communication operation is completed, the charging / discharging circuit is automatically started to be charged. Therefore, the user does not need to perform the calling operation, the charging operation to the flash unit, and the like again, which can reduce the operational burden on the user.

A second aspect of the present invention is a portable terminal device incorporating a camera and an electronic flash unit having a light emitting unit and a charging / discharging circuit for supplying a predetermined light emitting voltage boosted to the light emitting unit. , A request relating to execution of a control mode involving wireless communication operation is monitored in a state where a camera photographing mode including an operation of supplying a charging voltage to the electronic flash unit is set. Then, when the execution request of the control mode is detected by this monitoring, the camera photographing mode is changed to the control mode corresponding to the execution request and the control operation is executed.

Therefore, according to the present invention, when the execution request of the control mode accompanied by the wireless communication operation is input in the state where the camera photographing mode is set, the mode of the terminal device automatically performs this wireless communication operation. The control mode is changed accordingly. For this reason, it is possible to prevent not only the charging operation for the flash unit but also the image capturing operation of the camera and the display operation of the captured image and the wireless communication operation from being performed at the same time. It is possible to prevent a problem that a large amount of power supply current is consumed, and to avoid a sudden voltage drop of the battery.

Further, the present invention monitors the end of the control operation in the control mode after the camera shooting mode is changed to the control mode involving the wireless communication operation, and after the end of the control operation is detected, the mode of the terminal device is taken by the camera. It is also characterized by restoring the mode. With such a configuration, when the execution of the control mode involving the wireless communication operation is completed, the operation mode of the terminal device is automatically restored to the camera photographing mode. For this reason, the user does not need to set the camera shooting mode again after the end of the control associated with the incoming / outgoing call, the position registration, and the like, which reduces the operational burden on the user.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS (First Embodiment) A first embodiment of a portable terminal device according to the present invention has a camera and a flash circuit built in the device and has a high-emission unit such as a xenon lamp as a light emitting unit. In addition to adopting a high-intensity flash lamp, a circuit including a charge / discharge circuit is provided in the flash circuit to emit light from the high-intensity flash lamp, and the charge period of the charge / discharge circuit and the wireless communication operation period are different from each other. The timing is controlled.

FIG. 1 is a front view showing the outer appearance of a portable terminal device according to the first embodiment of the present invention. This mobile terminal device is a foldable terminal in which an upper housing A and a lower housing B are rotatably connected by a hinge portion C, and a liquid crystal display (LCD) 21 is provided on the front surface of the upper housing A. A speaker (not shown) for receiving is provided, and a key input unit 21 and a microphone (not shown) for transmitting are provided on the front surface of the lower housing B.

Further, a camera unit D and an antenna 1 are arranged on the upper end of the upper housing A. Of these, the camera unit D accommodates the camera 23 and the light emitting unit 31, and is rotatable with respect to the upper housing A by a rotating mechanism. This rotating mechanism is used for the camera 23 and the light emitting unit 31.
The direction of the image can be changed according to the position of the subject. With this, the user can use the display unit 22 as a finder while capturing an image of the surrounding scenery, a person, a document, and even his / her own face as a subject. It becomes possible to do.

On the other hand, FIG. 2 is a block diagram showing the circuit configuration of the portable terminal device according to the first embodiment of the present invention. In the figure, a radio carrier signal sent from a base station (not shown) via a radio channel is received by an antenna 1 and then input to a receiving circuit (RX) 3 via an antenna duplexer (DUP) 2. In the receiving circuit 3, the received radio carrier signal is transmitted to the frequency synthesizer (S
YN) 4 and the received local oscillation signal are mixed and frequency-converted into a reception intermediate frequency signal. Then, the received intermediate frequency signal is an A / D signal including a low pass filter.
After being sampled in the converter 6, it is input to the digital demodulation circuit (DEM) 7.

The digital demodulation circuit 7 establishes frame synchronization and bit synchronization for the digital received intermediate frequency signal, and then performs digital demodulation processing. The baseband digital demodulated signal obtained by this demodulation processing is a time division multiple access circuit (TDMA) 8
, And the time slot destined for itself is separated and extracted for each transmission frame. The information on the frame synchronization and the bit synchronization obtained in the digital demodulation circuit 7 is notified to the control circuit 20.

The digital demodulated signal output from the TDMA circuit 8 is subsequently subjected to an error correction code decoding circuit (CH-
COD) 9 and undergoes error correction decoding processing. In this error-correction-decoded digital demodulated signal,
Depending on the communication mode at that time, there are information data such as mail and call voice data. Of these, the call voice data is input to the voice code decoding circuit (SP-COD) 10 and subjected to voice decoding processing, whereby a digital received signal is reproduced. The digital reception signal is converted into an analog reception signal by the D / A converter 11 and then input to a reception amplifier (not shown). After being amplified here, it is supplied to the speaker 13 as a reception device and output in a loud voice. Further, information data such as received mail and received download data is taken into the control circuit 20, and the control circuit 20 causes the memory (M
EM) 24 and is decrypted and displayed on the display unit 22.
Is displayed in.

On the other hand, the voice transmitted by the speaker is the microphone 1
4 collects the sound, converts it into a transmission signal, further amplifies it to a predetermined level by a transmission amplifier (not shown), and then A
It is input to the / D converter 19. Then, the A / D converter 19 samples the signal at a predetermined sampling period, and thereby, the signal is converted into a digital transmission signal composed of a sample pulse train. After the acoustic echo is canceled by an echo canceller (not shown), the digital transmission signal is input to the voice code decoding circuit (SP-COD) 10 and is voice coded here.

This voice-encoded digital transmission signal is input to an error correction code decoding circuit (CH-COD) 9 where it is error correction coded. In addition, the control circuit 20
Information data such as image data and a transmission mail output from is also input to the error correction code decoding circuit 9 and is error correction coded. The digital transmission signal output from the error correction code decoding circuit 9 is input to the TDMA circuit 8. In the TDMA circuit 8, a transmission frame compatible with the TDMA method is generated, and a process for inserting the digital transmission signal into the time slot assigned to the own device in the transmission frame is performed.

The digital transmission signal output from the TDMA circuit 8 is subsequently supplied to a digital modulation circuit (MOD).
15 is input. In the digital modulation circuit 15, a transmission intermediate frequency signal digitally modulated by the digital transmission signal is generated, and the transmission intermediate frequency signal is D / A.
After being converted into an analog signal by the converter 16, it is input to the transmission circuit (TX) 5. As a digital modulation method, for example, π / 4 shift DQPSK (π / 4 shif
ted, differentially encoded quadrature phase shift
keying) method is used.

In the transmission circuit 5, the modulated transmission intermediate frequency signal is mixed with the transmission local oscillation signal output from the frequency synthesizer 4, and thereby converted into a radio carrier frequency corresponding to a radio communication channel. Then, this transmission radio carrier signal is controlled to a predetermined transmission power level by a transmission power amplifier (not shown), and then transmitted from the antenna 1 to the base station (not shown) via the antenna duplexer 2.

The key input section 21 is provided with various keys necessary for communication such as a transmission key, an end key, a plurality of function keys and a dial key, and a shutter key and a flash circuit 30 for operating the camera 23. It has a charging key for charging. The shutter key and the charge key can also be used as keys required for the above communication under the control of software.

The display 22 is, for example, a liquid crystal display (LC
D: Liquid Crystal Display) is used to display the display data output from the control circuit 20. The display data includes not only management data such as a telephone directory and transmission / reception history, data representing the operating state of the apparatus, but also transmission / reception mail and image data.

The camera 23 is, for example, a CMOS (Compleme
ntary Metal Oxide Semiconductor) or CCD (Charg
It uses a solid-state imaging device such as an e-coupled device) and is controlled by the control circuit 20.

The memory 24 is composed of, for example, a RAM or a flash memory, and stores mails and download data received from a telephone directory, a terminal of a communication partner or an information site, image data taken by the camera 21, and transmission mails. And so on.

The power supply circuit 18 charges the power supply voltage Vcc necessary for the operation of each circuit of the portable terminal device and the capacitor 33 of the flash circuit 30 based on the output voltage of the battery 17 which is a secondary battery. Generate the required power supply voltage Vss.

By the way, the portable terminal device has a built-in flash circuit 30. This flash circuit 30
For example, it has a light emitting unit 31 that uses a high-voltage light emission drive type flash lamp such as a xenon lamp, and further, in order to drive the light emitting unit 31 to emit light, a power supply circuit 32, a capacitor 33, a delay control unit 34, and a charge display unit 35. have.

First of all, the power supply circuit 32 includes the control circuit 2
The power supply voltage Vss output from the power supply circuit 18 for the power supply time designated by the power supply control signal given from 0.
Is supplied to the capacitor 33 for charging. Here, as the above-mentioned power supply time, two types of first power supply time and second power supply time are prepared. The first power supply time is the flash circuit 3
It is set to a time (for example, 15 seconds) sufficient and sufficient to charge the 0 capacitor 33 from the initial state to the fully charged state. The second power feeding time is set to a time (for example, 10 seconds) necessary and sufficient for additionally charging the capacitor 33 of the flash circuit 30 from a partially discharged state to a fully charged state.

The delay control section 34 synchronizes the light emission timing of the light emitting section 31 with the photographing timing of the camera 23, and delays the light emission control signal output from the control circuit 20 by a preset delay time to emit light. Give to part 31,
As a result, the electric charge charged in the capacitor 33 is discharged and the light emitting section 31 is caused to emit light.

The charge display section 35 is composed of, for example, a neon tube, and lights up when the capacitor 33 is fully charged. Therefore, the user can confirm the completion of charging by lighting the charging display unit 35.

On the other hand, the control circuit 20 is provided with, for example, a microcomputer as a main control unit, and has a normal control function such as a radio access control function and a call control function, and a new control function according to the present invention, that is, a camera. The imaging control function 20a, the flash power supply control function 20b, and the timing control function 20c are provided.

When the camera image pickup control function 20a displays the moving image imaged by the camera 23 on the display unit 22 used as a finder in the state where the camera mode is selected and designated, and when the shutter key is pressed in this state. The captured still image at this point is stored in the memory 24.

The flash power supply control function 20b activates the flash mode when the charge key is pressed while setting the camera mode. In this flash mode,
First, it is determined whether or not a preset power supply condition is satisfied. When the result of this determination is that the power supply condition is satisfied, it is determined whether the state of charge of the flash circuit 30 at this time is the initial state. Then, in the initial state, the first power supply time described above is selected, while in the state where the battery has already been partially charged, the second power supply time is selected to specify these. A power supply control signal is generated and given to the power supply circuit 32.

The timing control function 20c monitors execution requests of various control modes such as outgoing and incoming calls, location registration, and handover accompanied by wireless transmission operations during the setting of the camera mode, and requests for execution of these control modes. When is input, the camera mode setting is canceled and the control mode is entered. At this time, the camera mode is stored, and after the execution of the control mode is completed, the mode of the device is automatically returned to the camera mode.

The timing control function 20c further includes the capacitor 33 when the flash mode is set.
The flash operating condition is determined before the start of power supply to and during the power supply period. In the determination of the flash operation condition, it is determined whether or not there is a request to execute a control mode that involves a wireless transmission operation such as call origination, call termination, location registration, and handover. Then, when the execution request of the control mode is generated,
The power supply to the capacitor 33 is interrupted and the control mode is entered. When the control mode ends, the flash mode is automatically restored and the charging operation is restarted.

Next, the camera photographing operation of the apparatus configured as described above will be described. In the standby state, the control circuit 20 controls the steps 3a and 3 as shown in FIG.
While monitoring the occurrence of incoming / outgoing calls and the occurrence of location registration / handover in b, the selection operation of other various functions is monitored in step 3c. Then, in this state, if an incoming / outgoing call occurs, the call mode is entered, and if a location registration / handover request is issued, the location registration / handover control is performed.

On the other hand, it is assumed that the user performs a camera mode selection operation. Then the control circuit 2
0 sets the camera mode and then starts its control. FIG. 4 is a flowchart showing the procedure and contents.

The control circuit 20 first determines in step 4a whether or not the camera operating conditions are satisfied. That is,
The control circuit 20 monitors the request for incoming / outgoing and the request for location registration / handover, and continues the control in the camera mode only when the control for outgoing / incoming or location registration / handover is not being performed.

When the control of the camera mode is continued, the control circuit 20 determines in step 4b whether the flash mode using the flash or the normal camera mode not using the flash is selected. And when the normal camera mode is selected,
In step 4c, the display unit 22 is operated as a finder, and the image data captured by the camera 23 is displayed on the display unit 22. When the user presses the shutter key in this state, the process proceeds from step 4d to step 4e, and the captured image data at this point is stored in the memory 24. If the erase operation is performed, the memory 24
The captured image data stored in is selectively discarded.

When the photographing control operation corresponding to one photograph is completed, the control circuit 20 determines in step 4f whether the photographing is completed. Then, in this state, when the user performs a camera mode end operation on the key input unit 21, the process proceeds to step 4g, where the camera 23 and the display unit 22 are operated.
2 is stopped and the setting of the camera mode is released, and then the standby control shown in FIG. 3 is restored. On the other hand, if the end operation of the camera mode is not performed, the process returns to step 4a and the control of the camera mode described above is repeatedly executed.

On the other hand, it is assumed that an incoming / outgoing call occurs or control relating to location registration / handover is about to be performed while the camera mode control is being executed. In this case, when the control circuit 20 detects the request for call origination / receipt or the request for location registration / handover in step 4a, the setting of the camera mode is released at this point, and control relating to call origination / termination or control relating to location registration is performed. Switch to mode.

That is, when a call origination / termination request or a location registration / handover request occurs during the setting of the camera mode, the control relating to the camera mode is stopped and the control relating to the origination / termination or the location registration control. Is prioritized.

Therefore, there is no fear that the control period according to the camera mode and the execution period of the control relating to call origination / receipt or the control relating to position registration / handover overlap, and the camera imaging operation and the wireless transmission / reception operation are not performed at the same time. . Therefore, it is possible to prevent a temporary increase in the power supply current and prevent a decrease in the battery voltage, and thus to stably maintain the operation of the control circuit 20.

Further, when the execution of the control relating to the outgoing / incoming call or the control relating to the location registration / handover is completed, the control circuit 20 switches the mode of the device before shifting to the control relating to the outgoing / incoming call or the location registration / handover,
That is, the camera mode is restored. Therefore, the user can continue shooting with the camera without resetting the mode of the apparatus to the camera mode again.

Next, the operation when the flash mode is selected will be described. That is, it is assumed that the user presses the charge key to perform flash photography while the camera mode is set. Then, the control circuit 20 detects this operation in step 4b, and thereafter executes the flash mode control. FIG. 5 is a flowchart showing the control procedure and control contents.

That is, when shifting to the flash mode, the control circuit 20 first determines in step 5a whether or not the flash operation condition is satisfied. In the determination of the flash operation condition, a request relating to outgoing / incoming call or a request relating to location registration / handover is monitored, and it is determined that the flash operation condition is satisfied only when these requests are not generated.

When it is confirmed that the flash operation condition is satisfied, the control circuit 20 determines in step 5b whether or not the power supply condition is satisfied. At this time, the power supply conditions to be determined are the following three items. Power supply condition 1 The continuous pressing time of the charge key must be less than the specified time. Power supply condition 2 The remaining battery level of the mobile terminal device is 10% or more. Power supply condition 3 The power supply time has not exceeded.

The power supply condition 1 is to eliminate erroneous charging when the charge key is continuously pressed in a state not intended by the user. The power supply condition 2 is to prevent the capacitor 33 of the flash circuit 30 from being charged when the remaining battery level of the mobile terminal device is low. As a result, it is possible to prevent the portable terminal device from becoming inoperable as a result of the charging of the capacitor 33 causing the battery to run out. The power supply condition 3 is to prevent overcharging in a charged state.

When all of the above power supply conditions 1 to 3 are satisfied, the control circuit 20 moves to step 5c and causes the display unit 22 to display a message indicating that power is being supplied.
Then, in step 5d, it is determined whether or not the wireless transmission operation is about to be performed. As a result of this determination, if the wireless transmission operation is not performed, the control circuit 20 performs step 5e.
At, a power supply control signal is generated and given to the power supply circuit 32. Then, the power supply circuit 32 supplies the power supply voltage Vss to the capacitor 33 to charge the capacitor 33.

During this charging operation, the user can confirm that the capacitor 33 is being charged by the message displayed on the display unit 22 indicating that the power is being supplied. And
When the capacitor 33 is fully charged, the flash circuit 30
The neon tube of the charging display unit 32 of turns on. Therefore, the user can know the completion of charging by turning on the charge display unit 32.

When any one of the above power supply conditions 1 to 3 is not satisfied, the control circuit 20 proceeds to step 5h to perform power supply stop processing. That is,
No power supply control signal is generated. Therefore, the power feeding circuit 32
The supply voltage Vss is not supplied from the capacitor to the capacitor 33. In addition, at this time, the control circuit 20 generates a message indicating “a factor of the power supply condition not being satisfied” in step 5i,
This message is displayed on the display unit 22. Therefore, the user can clearly know the reason why the capacitor 33 is not charged by this message.

By the way, it is assumed that, for example, an incoming call is requested during the charging operation. Then, the control circuit 20 determines that the wireless transmission operation is about to be performed, and proceeds from step 5d to step 5f. Then, in this step 5f, the power supply operation is immediately stopped, and the operation mode of the device is shifted from the flash mode to the control mode related to the incoming call.

Then, the control relating to this incoming call is completed,
When the stop of the wireless transmission / reception operation is detected in step 5g, the control circuit 20 restores the operation mode of the device from the control mode relating to the incoming call to the flash mode and restarts the charging control described above.

That is, while setting the flash mode,
Even when an incoming call control request is issued, the power supply control in the flash mode is stopped, and the control related to the incoming call is preferentially executed.

Therefore, the power supply operation in the flash mode and the wireless transmission operation by the incoming call control or the like are not performed at the same time. Therefore, it is possible to prevent a temporary increase in the power supply current and prevent the battery voltage Vcc from lowering, thereby stably maintaining the operation of the control circuit 20.

As described above, in the first embodiment, the camera 23 and the flash circuit 30 are built in the device. Therefore, it is not necessary to carry the flash unit separately from the main body of the device, and thus it is possible to prevent the handling and operability of the terminal device from being degraded.

Before the charging operation of the flash circuit 30 is started and before the charging operation of the flash circuit 30 is performed, the charging operation period of the capacitor 33 in the flash circuit 30 and the wireless transmission operation period due to call origination / receipt and location registration / handover do not overlap each other. Requests for call origination / location and location registration / handover are monitored during the period, and when these requests are detected, the charging operation is stopped and the above-mentioned control of call origination / location and location registration / handover is executed.

Therefore, there is no problem in which a large amount of power supply current is temporarily consumed in the portable terminal device, whereby abrupt voltage drop of the battery is avoided, and malfunction of the CPU in the control circuit 20 is prevented and control is performed. The operation can be stably held. You can also make / receive calls, register location /
The original control of the mobile terminal device, such as handover, can be reliably executed with priority.

Further, when the operation mode of the device is changed to the control relating to the incoming call during the power supply control in the flash mode, the power supply control in the flash mode is automatically performed after the wireless transmission / reception operation by this control is completed. Return. Therefore, the user does not need to press the charging key again after waiting for the end of the wireless transmission / reception operation, which can reduce the operational burden.

(Second Embodiment) A second embodiment of the portable terminal device according to the present invention has a camera and a flash circuit built in the device and solid-state light emission such as a white light emitting diode (white LED) as a light emitting section. By using an element, it is possible to drive the light emission in real time by the light emission drive signal of the control circuit, so that in addition to flash photography of a still image, continuous illumination photography of a moving image can be performed. Further, the execution timing of the light emission drive control and the control involving the wireless transmission / reception operation is controlled so that the emission drive period of the solid-state light emitting element and the wireless transmission / reception operation period do not overlap with each other.

FIG. 6 is a block diagram showing the circuit configuration of a mobile terminal device according to the second embodiment of the present invention. The external appearance of the mobile terminal device of this embodiment is almost the same as the configuration shown in FIG. 1 in the first embodiment.
The description here is omitted.

The mobile terminal device according to this embodiment includes the wireless unit 1.
10, a baseband unit 120, an input / output unit 130,
It is composed of a power supply unit 140.

In the figure, a radio signal arriving from a base station (not shown) via a radio channel is represented by an antenna 111.
Then, it is input to the receiving circuit (RX) 113 via the antenna duplexer (DUP) 112. Receiver circuit 1
Reference numeral 13 includes a high frequency amplifier, a frequency converter and a demodulator. The radio signal is low-noise amplified by a low-noise amplifier, and then frequency-converted into a reception intermediate frequency signal or a reception baseband signal by mixing with the reception local oscillation signal generated from the frequency synthesizer (SYN) 114 in the frequency converter. Then, the output signal is digitally demodulated by a demodulator. As the demodulation method, for example, an orthogonal demodulation method corresponding to the QPSK method and a spectrum despreading method using a spread code are used. The frequency of the received local oscillation signal generated from the frequency synthesizer 114 is
It is instructed by the control circuit 121 provided in the baseband unit 120.

The demodulated signal output from the demodulator is input to the baseband section 120. Baseband section 120
Includes a control circuit 121, a demultiplexing unit 122, a voice code decoding unit (hereinafter referred to as voice codec) 123, a multimedia processing unit 124, an LCD control unit 125, and a memory unit 126.

The demodulated signal is supplied from the control circuit 121 to the demultiplexer 122. The demultiplexing unit 122 performs demultiplexing processing of packets called MUX-PDU defined by ITUT H.223, for example. That is, at the time of reception, the audio data, the image data, and the additional data included in the demodulated packet are separated according to the contents of the header. Of these, the audio data is supplied to the audio codec 123, for example, AMR.
It is decoded by a voice code decoding method such as (Adaptive Multi Rate). The digital audio signal expanded by the decoding process is converted into an analog audio signal by a digital / analog converter (not shown) (hereinafter referred to as a D / A converter), and then the speaker 1 of the input / output unit 130.
A loud sound is output from 32.

On the other hand, the image data is supplied to the multimedia processing unit 124 where it is subjected to image decoding processing.
The image encoding / decoding method is, for example, MPEG4 (Moving Pic).
tureExperts Group 4) is used. Then, the image signal expanded by this decoding process is displayed on the LCD control unit 12
5, and is supplied to the LCD 134 of the input / output unit 130 and displayed. The additional data is identified by the control circuit 121, and then supplied to the LCD 134 via the LCD control unit 125 and displayed.

When the answering machine mode is set in the control circuit 121, the received voice data and the received image data are stored in the memory section 126. The LCD 134 also displays telephone directory data, transmission / reception history data, and a telephone directory stored in the memory unit 126. Further, various information output from the control circuit 121 indicating the operating state of the device itself is displayed as pictogram information. It The pict information is, for example, a received field strength detection value (RSSI),
There is remaining battery power.

On the other hand, the microphone 13 of the input / output unit 130
The transmitted voice signal of the user output from the reference numeral 1 is input to the voice signal processing module 123 of the baseband unit 120, where it is voice-encoded and then input to the demultiplexing unit 122. In addition, the image signal output from the camera 133 is output to the multimedia processing unit 12 of the baseband unit 120.
4 and the image is encoded according to MPEG4 and then input to the demultiplexing unit 122. The demultiplexing unit 122 multiplexes the encoded audio data and image data and the control data generated in the control circuit 121 according to ITUT H.223 to create a transmission packet (MUX-PDU). The transmission packet created by the demultiplexing unit 122 is transmitted from the control circuit 121 to the wireless unit 11
0 is output to the transmission circuit (TX) 115.

The transmission circuit 115 includes a modulator, a frequency converter and a transmission power amplifier. The transmission data is digitally modulated by a modulator and then mixed by a frequency converter with a transmission local oscillation signal generated from a frequency synthesizer 114 to be frequency-converted into a radio frequency signal. As a modulation method, a QPSK method and a spread spectrum method using a spread code are used. Then, the generated transmission radio frequency signal is amplified to a predetermined transmission level by the transmission power amplifier, and then the antenna duplexer 112 is used.
Is supplied to the antenna 111 via the
1 is transmitted to a base station (not shown).

In the power supply section 140, a battery 141 such as a lithium ion battery, a charging circuit 142 for charging the battery 141 based on commercial power supply output (AC100V), and a voltage generation circuit (PS) 143. And are provided. The voltage generation circuit 143 includes, for example, a DC / DC converter, and generates a predetermined power supply voltage Vcc based on the output voltage of the battery 141.

Further, the input / output unit 130 is provided with an illuminator 136 for illuminating the LCD 134 and the key input unit 135 during operation and communication. This illuminator 136
Is called, for example, a backlight or an illumination.

By the way, in the portable terminal device, the input / output unit 13
0 is provided with a white light emitting diode (white LED) 137 as a flash light emitting unit, and the base band unit 12
A light emission drive circuit 127 is provided at 0. Of these, the light emission drive circuit 127 boosts the voltage value of the light emission drive signal supplied from the control circuit 121 from 4 V to 16 V and supplies the voltage value to the white LED 137.

The control circuit 121 has, as new control functions according to the present invention, a still image shooting control function 121a, a moving image shooting control function 121b, and an LED light emission control function 121.
c and a timing control function 121d.

When the still image shooting mode is selected as the camera mode, the still image shooting control function 121a displays the moving image data taken by the camera 133 on the LCD 134 used as a finder, and in this state. The still image data captured at this time when the shutter key of the key input unit 135 is pressed is stored in the memory 12.
Save to 6. It should be noted that the moving image data may be thinned out in frame units when the image data is stored. In this way, the storage area of the memory 126 can be saved.

The moving image shooting control function 121b is used when the moving image shooting mode is selected as the camera mode.
The moving image data captured by 33 is displayed on the LCD 134 used as a finder, and when the shooting button of the key input unit 135 is pressed in this state, the period from that point until the shooting button is pressed again. Then, the encoded data of the moving image data captured by the camera 133 is stored in the memory unit 126.

The LED light emission drive control function 121c determines whether or not the operating condition of the flash is satisfied when the use of the flash is selected in the still image shooting control and the moving image shooting control. Here, the operating condition of the flash to be judged is whether or not the remaining capacity of the battery 141 is equal to or more than a predetermined amount.

When it is confirmed that these operating conditions are satisfied, in the case of the still image shooting, a white LED 137 is supplied with a pulsed light emission drive signal through the light emission drive circuit 127 in synchronization with the still image shooting operation. The white LED 137 is caused to flash. In the case of video recording, the white LED 137 is displayed during the video recording period.
Light continuously. At that time, since the white LED 137 emits light substantially only during the period when the camera 133 receives the image frame, the light emission drive signal is turned on only during the image frame light receiving period of the camera 133 and turned off during the other interval periods. To control. That is, the light emission drive signal is intermittently supplied in synchronization with the image frame timing, thereby reducing power consumption and extending the battery life.

The timing control function 121d stops the operation when the execution request of the control mode accompanied by the wireless transmission operation such as the outgoing call, the incoming call, the position registration and the handover is detected in the determination of the camera operation condition in the still image shooting control. The setting of the image shooting mode is canceled and the control mode is accompanied by the wireless transmission operation. At this time, the still image shooting mode is stored, and the mode of the apparatus is automatically returned to the still image shooting mode after the execution of the control mode involving the wireless transmission / reception operation is completed.

On the other hand, in the moving image shooting control period, when the execution request of the control mode involving the wireless transmission / reception operation is detected by the determination of the camera operating condition before the start of the shooting, the moving image is shot as in the case of the still image shooting. The setting of the photographing mode is canceled and the control mode including the wireless transmission / reception operation is entered.
On the other hand, when a control mode execution request involving wireless transmission / reception operation is generated after the start of moving image shooting, this is ignored and the moving image shooting control is continuously executed. Then, after the end of the moving image capturing control, the control mode is shifted to the wireless transmission / reception operation.

Next, the camera photographing operation by the apparatus configured as described above will be described. When the user selects the camera mode in the standby state, the control circuit 121 sets the device to the camera mode and thereafter executes the control related to the camera mode as follows. FIG. 7 is a flowchart showing the control procedure, particularly showing the procedure and contents of still image shooting control.

That is, the control circuit 121 first determines in step 7a whether the user has selected the still image shooting mode or the moving image shooting mode. Assuming that the still image shooting mode is selected now, the control circuit 121 displays the LC
After operating D134 as a finder, it is determined in step 7c whether or not the camera operating conditions are satisfied. For example, it is determined whether or not a request to execute a control mode involving a wireless transmission / reception operation such as transmission / reception, location registration, and handover has been issued.

In step 7d, it is determined whether or not the use of the flash is selected. If the user selects the use of the flash, it is determined in step 7e whether or not the flash operation condition is satisfied. Here, for example, it is determined whether or not the remaining capacity of the battery 141 is equal to or more than a predetermined first amount. Then, the control circuit 12
In No. 1, the determination of the camera operating condition and the flash operating condition is repeated until the shutter button is pressed.

As a result of the determination of the camera operating condition and the flash operating condition, if it is detected that either one of them does not satisfy the operating condition, the control circuit 121 proceeds to step 7f to set the above operating condition. A message indicating that the user is not satisfied and the reason thereof is created and the LCD 134 is displayed.
To display.

Now, assume that the user presses the shutter button in this state. Then, the control circuit 121 proceeds from step 7g to step 7h, and if the use of the flash is preselected here, the control circuit 121 generates a pulsed light emission drive signal in synchronization with the timing of capturing a still image. The light emission drive signal is boosted by the light emission drive circuit 127 from, for example, 4V to 16V, and then supplied to the white LED 137. As a result, the white LED 137 emits flash light in response to the boosted pulsed light emission drive signal.

The control circuit 121 stores the still image data captured by the camera 133 in step 7i in the memory unit 126 after being encoded by the multimedia processing unit 124. When the key input unit 135 performs an erasing operation, the encoded still image data stored in the memory unit 126 is selectively discarded. The periods indicated by the diagonal lines in FIG. 9 indicate the image pickup period of still image data and the flash emission period. As shown in the figure, the still image capturing operation is performed only during the period when the control involving the wireless transmission / reception operation is not performed.

When the control of photographing one still image is completed, the control circuit 121 determines in step 7j whether or not the photographing is completed. Then, in this state, the user inputs the key input unit 13
When the end operation of the camera mode is performed in 5, the operation proceeds to step 7k, the operation of the camera 133 and the LCD 134 is stopped here, and the setting of the camera mode is canceled, and then the standby control is restored. On the other hand, if the end operation of the camera mode is not performed, the process returns to step 7b to repeatedly execute the still image shooting control described above.

On the other hand, it is assumed that the user selects the moving image shooting mode before shooting. Then, the control circuit 121 thereafter executes moving image shooting control as follows. FIG. 8 is a flowchart showing the control procedure and control contents.

That is, the control circuit 121 first operates the LCD 134 as a finder in step 8a, and then, in step 8b, determines whether or not the camera operating conditions are satisfied, as in the case of the still image photographing mode described above. To judge. For example, it is determined whether or not a request to execute a control mode involving a wireless transmission operation such as call origination, call termination, location registration, and handover has occurred.

Next, in step 8c, it is determined whether or not the use of flash is selected. If the user selects to use the flash, it is determined in step 8d whether or not the flash operating condition is satisfied. For example, when the remaining capacity of the battery 141 is the second
It is determined whether or not Here, in the case of moving image shooting, white LE is used for a longer time than in the case of still image shooting.
Since the D137 is caused to emit light, the determination value (second amount) of the battery remaining amount is set to a value higher than the determination value (first amount) in the still image shooting described above. Then, the control circuit 121 repeats the determination of the camera operating condition and the flash operating condition until the shooting button is pressed in the key input unit 135.

As a result of the determination of the camera operating condition and the flash operating condition, if it is detected that either one of them does not satisfy the operating condition, the control circuit 121 proceeds to step 8e to set the above operating condition. A message indicating that the user is not satisfied and the reason thereof is created and the LCD 134 is displayed.
To display.

Now, assume that the user presses the photographing button in this state. Then, the control circuit 121 proceeds from step 8f to step 8g, and first sets the mode in which the execution of the control mode involving the wireless transmission / reception operation is rejected. This refusal mode is valid until a shooting end operation is performed thereafter, and even if a request for execution of control involving wireless transmission operations such as call origination / receipt and location registration / handover occurs during this period, this request is invalid. It Note that the content of this request may be stored, and the control mode corresponding to this request may be automatically set after the end of the moving image shooting period to execute the control.

Next, if the use of the flash is selected in advance, the control circuit 121 intermittently generates the light emission drive signal in synchronization with the image pickup frame timing of the moving image in step 8h. This light emission drive signal is applied to the light emission drive circuit 12
White LED after being boosted from 4V to 16V at 7
137. As a result, the white LED 137 is
Light is emitted intermittently in synchronization with the image capturing frame timing over the moving image capturing period. Since the intermittent cycle is extremely short, it appears to the user that the light is continuously emitted. FIG. 11 is a diagram showing the relationship between the light emission drive timing of the white LED 137 and the image frame timing.

In parallel with this, the control circuit 121
The moving image data captured by the camera 133 in step 8i is encoded by the multimedia processing unit 124 and then stored in the memory unit 126. Then, the user presses the shooting button again to end the shooting of the moving image, and the shooting control operation of the moving image is continued until this operation is detected in step 8j. The hatched period in FIG. 10 indicates this moving image shooting period. As shown in the figure, the execution of the control involving the wireless transmission operation is rejected during the moving image shooting period.

When the moving image photographing for a desired period is completed, the control circuit 121 causes the step 8j to step 8j.
Then, the operation of the camera 133 and the LCD 134 is stopped here. Then, the standby control is restored in response to the camera mode setting cancel operation.

As described above, in the second embodiment, the white LED 137 is adopted as the flash light emitting portion, and the white LED 137 is driven to emit light in real time by supplying the light emission drive signal from the control circuit 121. . For this reason, continuous light emission is possible, which enables moving image shooting. In addition, compared to the case of using a high-intensity light-emitting lamp such as a xenon lamp, the power consumption required for light emission driving can be significantly reduced, and a charging / discharging capacitor is unnecessary, and the circuit structure can be downsized accordingly. it can.

The white LED 137 has a smaller amount of light than a xenon lamp or an ordinary light bulb. For this reason, it is usually difficult to take a flash image of a subject at a position (for example, 2 to 5 m) far from the camera. However, the size of the LCD 134 of the mobile terminal device is generally small, and when the LCD 134 is used as a finder, the effective shooting distance to the subject is about 0.5 m to 1.5 m. Therefore, it is sufficient to deliver the flash emission at a distance within this range, and the white LED 137 can be sufficiently used. If it is desired to extend the shooting distance to 1.5 m or more, a small krypton lamp or the like may be used.

Further, in the present embodiment, the execution request of the control accompanied by the wireless transmission operation such as the incoming / outgoing call and the position registration / handover is monitored in both the still image shooting mode and the moving image shooting mode, and this execution request is executed. When occurs, the camera mode is temporarily suspended and the control according to the execution request is executed. For this reason, it is possible to prevent the imaging operation of the camera, which emits the flash light, and the wireless transmission / reception operation from being performed at the same time, which prevents a problem in which a large amount of power supply current is temporarily consumed in the mobile terminal device. Therefore, abrupt voltage drop of the battery 141 can be avoided. Further, it is possible to prevent various noises emitted when the flash-related circuit operates inside the mobile terminal device from interfering with the radio transmission / reception wave.

Further, a mode is set in which the execution of the control mode involving the wireless transmission / reception operation is rejected during the moving image shooting period.
Even if a request for execution of control involving a wireless transmission operation such as call origination / receipt or location registration / handover occurs during the moving image shooting period, this request is invalidated and the moving image shooting operation is continued. Therefore, it is possible to avoid a situation in which the moving image capturing operation period and the wireless transmission / reception period temporally overlap with each other, and even in this case, it is possible to avoid a rapid voltage drop of the battery 141.

Further, when a request for execution of control involving wireless transmission / reception operations such as call origination / receipt and position registration / handover occurs while the still image shooting mode and the moving image shooting mode are set, the shooting under the above setting is performed. Remember the mode,
Then, after the execution of the control involving the wireless transmission / reception operation is completed, the state of the stored photographing mode is automatically restored. For this reason, the user does not need to perform the operation for setting the shooting mode again, which can improve the operability.

(Other Embodiments) In the first embodiment, control involving wireless transmission / reception operations such as incoming / outgoing calls, location registration / handover, etc. is performed in both the normal camera mode and the flash mode. When the execution request of (1) is generated, the camera mode and the flash mode are temporarily released, and the control relating to the outgoing call, the incoming call, and the position registration / handover is executed. However, when the current consumption of the imaging operation of the camera 23 is not so large, the simultaneous execution with the wireless transmission / reception operation may be avoided only when the flash mode is used.

In each of the above-described embodiments, in the camera mode using the flash, it is first determined whether or not a control execution request involving wireless communication operation has been issued, and if the execution request has not been issued, Then, it is determined whether or not the flash operating condition such as the remaining capacity of the battery is satisfied. Then, when the flash operation condition is satisfied, the charging voltage is supplied to the flash circuit 30 or the white LED 137 is driven to emit light.

However, the present invention is not limited to this. First, it is determined whether or not the flash operation condition is satisfied, and if the condition is satisfied, then it is determined whether or not a control execution request accompanied by a wireless communication operation is issued. May be determined. As the flash operating condition, the power supply voltage value V of the battery is used.
cc is the charge to the flash circuit 30 or the white LED 13
Even if the light-emission driving of 7 is performed, the control circuits 20, 120
Is to maintain a value that enables reliable operation. If this condition is not satisfied, the charging voltage is unconditionally supplied to the flash circuit 30 or the white LED 137 is supplied.
Refuses to drive.

Further, in each of the above embodiments, the charging of the flash circuit 30 or the light emission driving operation of the white LED 137 is unconditionally stopped during the wireless communication operation period. However, it is determined whether or not the power supply voltage value Vcc of the battery is equal to or higher than a predetermined value, and if the power supply voltage value Vcc is equal to or higher than the predetermined value, the charging operation to the flash circuit 30 during the wireless communication operation or the white LE is performed.
The flash circuit 3 during the wireless transmission / reception operation is allowed only when the light emission drive operation of D137 is allowed and the value is lower than the predetermined value.
The charging operation to 0 or the light emission driving operation of the white LED 137 may be controlled to be stopped.

Further, in the first embodiment, when an incoming call is generated during the operation in the flash mode, a ringing sound or a vibration is generated, or the incoming call is displayed on the display unit 22 to display the incoming call. The user may be allowed to select whether to continue the operation or answer the incoming call. In this case, the flash mode may be released by the user pressing the hook button (call button) or the charge key.

Further, in the second embodiment, when shooting a moving image, the white LED 137 is made to emit light in all image frames as shown in FIG. However, when performing a process of thinning out the moving image data in frame units after shooting, the white LED 137 may stop emitting light during the shooting period of the image frame to be thinned out during shooting. In this way, white LE
It becomes possible to reduce unnecessary power consumption when the D137 is driven to emit light and further extend the life of the battery.

Furthermore, in the second embodiment, when shooting a moving image, the white LED 137 is intermittently driven to emit light in synchronization with the image pickup frame timing, as shown in FIG. However, the white LED is
The 137 may be made to continuously emit light. With this configuration, the control of the light emission drive timing is unnecessary, and the control load on the control unit can be reduced. Further, the continuous light emission period at this time may be set longer than that including the moving image capturing period. By doing so, it is possible to avoid the influence of light emission delay and the like, and obtain a high-quality moving image with stable brightness immediately after the start and end of the moving image capturing period.

Further, in the second embodiment, a mode is set in which the execution of the control mode accompanied by the wireless transmission / reception operation is rejected during the moving image shooting period, and wireless communication such as call origination / reception and position registration / handover is performed during the moving image shooting period. Even if a control execution request accompanied by a transmission operation is generated, this request is invalidated and the moving image shooting operation is continued. However, on the other hand, even during the video shooting period, if a request to execute a control involving a wireless transmission operation such as incoming / outgoing call or location registration / handover occurs, the video shooting operation is interrupted and the wireless transmission operation is stopped. You may make it perform the accompanying control. In this case, the moving image data stored in the memory unit 126 just before the interruption of shooting may be automatically deleted.

Further, in each of the above-described embodiments, the user manually sets whether to select the camera mode or the flash mode. However, the present invention is not limited to this, and based on the brightness level of the image pickup signal obtained by the camera, it is determined whether or not the surroundings have the brightness that requires the flash, and when it is determined that the flash is necessary, the flash The mode may be controlled to start automatically.
The necessity of the flash may be determined based on the detection output of a light receiving element such as a photodiode or a phototransistor provided separately from the camera.

Further, with the flash mode being activated, the optimum level of the light emission drive current is obtained based on the brightness level of the image pickup signal obtained by the camera before the start of the image pickup operation or during the image pickup operation. You may make it emit light by supplying the light emission drive current adjusted to the optimal level to a light emitting element. By doing so, it is possible to control the illuminance of the flash to an optimum value at all times according to the ambient brightness, and thus it is possible to obtain high-quality captured image data whose brightness is always constant. Further, when the surroundings are bright, the light emission drive current value is suppressed to a low value, so that useless power consumption is reduced and the battery life can be extended.

Furthermore, the present invention can be applied to a personal digital assistant (PDA), a portable personal computer, etc. in addition to the portable telephone.

In addition, the shape and configuration of the portable terminal device, the configuration of the flash circuit, the type of the light emitting element used as the light emitting unit, the procedure and contents of still image and moving image shooting control, and the procedure and content of charging control to the flash circuit. The LED light emission drive timing and the like can be modified in various ways without departing from the scope of the present invention.

[0118]

As described above in detail, in the first aspect of the invention, the camera, the electronic flash unit having the light emitting unit and the charging / discharging circuit for applying a predetermined light emitting voltage boosted to the light emitting unit are built-in. In a mobile terminal device, a request related to execution of control accompanied by wireless communication operation is monitored and a request related to charging of an electronic flash unit is monitored, and the wireless communication operation period and the charging voltage are monitored based on these monitoring results. In order to make it different from the supply period of
At least one of the wireless communication operation and the charging voltage supply operation is controlled.

According to a second aspect of the present invention, there is provided a portable terminal device having a camera, an electronic flash unit having a light emitting unit and a charging / discharging circuit for supplying a predetermined light emitting voltage boosted to the light emitting unit, While the camera photographing mode including the operation of supplying the charging voltage to the electronic flash unit is set, the request relating to the execution of the control mode involving the wireless communication operation is monitored. Then, when the execution request of the control mode is detected by this monitoring,
The camera photographing mode is changed to the control mode according to the execution request, and the control operation is executed.

Therefore, according to these inventions, it is possible to improve the operability and operability by eliminating the need to carry the flash unit, and further, the wireless communication operation period and the power supply operation period to the flash unit or the image pickup display of the camera. It is possible to prevent the operation period from overlapping, thereby reducing the fluctuation of the battery voltage and stably supplying the required battery voltage, thereby improving the reliability of the device operation. Can be provided.

[Brief description of drawings]

FIG. 1 is a front view showing an external configuration of a mobile terminal device according to a first embodiment of the present invention.

FIG. 2 is a block diagram showing a circuit configuration of a mobile terminal device according to the first embodiment of the present invention.

FIG. 3 is a flowchart showing a mode setting control procedure and its contents in the mobile terminal device shown in FIG.

4 is a flowchart showing a control procedure and contents of a camera mode in the mobile terminal device shown in FIG.

5 is a flowchart showing a flash mode control procedure and its contents in the mobile terminal device shown in FIG.

FIG. 6 is a block diagram showing a circuit configuration of a mobile terminal device according to a second embodiment of the present invention.

7 is a flowchart showing a control procedure and contents of a still image shooting mode in the mobile terminal device shown in FIG.

8 is a flowchart showing a control procedure and its contents of a moving image shooting mode in the mobile terminal device shown in FIG.

FIG. 9 is a timing chart for explaining an operation in a still image shooting mode.

FIG. 10 is a timing chart for explaining an operation in a moving image shooting mode.

FIG. 11 is a diagram showing a relationship between image frame timing and light emission driving timing of a light emitting diode in a moving image shooting mode.

[Explanation of symbols]

A: Upper housing B ... Lower housing C ... Hinge part D ... Camera unit 1 ... antenna 2 ... Antenna duplexer (DUP) 3 ... Receiving circuit (RX) 4 ... Frequency synthesizer (SYN) 5 ... Transmission circuit (TX) 6, 19 ... A / D converter 7. Digital demodulation circuit (DEM) 8 ... Time division multiple access circuit (TDMA) 9 ... Error correction code decoding circuit (CH-COD) 10 ... Speech code decoding circuit (SP-COD) 11, 16 ... D / A converter 13 ... Speaker 14 ... Microphone 15 ... Digital modulation circuit (MOD) 17 ... Battery 18 ... Power supply circuit (POW) 20 ... Control circuit 20a ... Camera shooting control function 20b ... Flash power feeding control function 20c ... Timing control function 21 ... Key input section 22 ... Display 23 ... Camera 24 ... Memory (MEM) 30 ... Flash circuit 31 ... Light emitting part 32 ... Power supply circuit 33 ... Capacitor 34 ... Delay control unit 35 ... Charge display 110 ... Wireless unit 111 ... Antenna 112 ... Antenna duplexer (DPX) 113 ... Receiving circuit (RX) 114 ... Frequency Synthesizer (SYN) 115 ... Transmission circuit (TX) 120 ... Baseband part 121 ... Control unit 121a ... Still image shooting control function 121b ... Movie shooting control function 121c ... LED light emission drive control function 121d ... Timing control function 122 ... Demultiplexing unit 123 ... Audio codec 124 ... Multimedia processing unit 125 ... LCD control unit 126 ... Memory unit 130 ... Input / output unit 131 ... Microphone 132 ... speaker 133 ... Camera 134 ... Liquid crystal display (LCD) 135 ... Key input section 136 ... Illuminator 137 ... White LED 140 ... Power supply unit 141 ... Battery 142 ... Charging circuit (CHG) 143 ... Voltage generation circuit (PS)

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Takehiko Tanaka             One share at 3-1, Asahigaoka, Hino City, Tokyo             Ceremony Company Toshiba Hino Factory (72) Inventor Yuji Umemoto             One share at 3-1, Asahigaoka, Hino City, Tokyo             Ceremony Company Toshiba Hino Factory F term (reference) 5K027 AA11 BB17 GG04 HH29                 5K067 BB04 DD52 KK06                 5K101 LL12 NN06 NN41

Claims (22)

[Claims] 1. A portable terminal device having a built-in camera, an electronic flash unit having a light emitting unit and a charging / discharging circuit for applying a predetermined predetermined light emitting voltage to the light emitting unit, wherein the electronic flash unit comprises: A power supply circuit that supplies a charging voltage to the charging / discharging circuit for charging, a first monitoring unit that monitors a request relating to execution of control involving wireless communication operation, and a charging voltage of the charging / discharging circuit of the electronic flash unit. Second monitoring means for monitoring a request relating to supply, and an execution period of the wireless communication operation and a charging voltage supply period to the charging / discharging circuit based on the monitoring results by the first and second monitoring means. And a control means for controlling at least one of the wireless communication operation and the charging voltage supply operation so as to be different from each other. The mobile terminal device. 2. The control means, when a request for execution of control involving the wireless communication operation is detected by the first monitoring means during the supply period of the charging voltage, at least the execution period of the wireless communication operation. The mobile terminal device according to claim 1, wherein the supply of the charging voltage in the inside is stopped. 3. The control unit controls the wireless communication operation when the execution request for the control involving the wireless communication operation is detected by the first monitoring unit during the supply period of the charging voltage. The mobile terminal device according to claim 1, wherein the start of execution is delayed after the end of the supply of the charging voltage. 4. The wireless communication operation of the control means, when the charging voltage supply request is detected by the second monitoring means, during the execution period of the wireless communication operation. The mobile terminal device according to claim 1, wherein the mobile terminal device is delayed after the end of. 5. The control means determines whether or not the remaining amount of the battery or the output voltage value is equal to or more than a predetermined value, and if the value is equal to or more than the predetermined value, supply of the charging voltage during the execution period of the wireless communication operation 2. The portable terminal device according to claim 1, wherein the charging voltage supply is stopped during the execution period of the wireless communication operation when the value is less than a predetermined value. 6. A portable terminal device having a built-in camera, an electronic flash unit having a light emitting unit, and a charging / discharging circuit for supplying a predetermined light emitting voltage boosted to the light emitting unit, wherein the electronic flash unit comprises: Monitoring means for monitoring the execution request of the control mode involving wireless communication in a state where the camera photographing mode including the operation of supplying the charging voltage to the charging / discharging circuit is set, and the control mode involving wireless communication by this monitoring means. And a mode change control means for changing the operation mode of the mobile terminal device from the camera photographing mode to the control mode involving wireless communication when the execution request is detected. 7. After the operation mode of the mobile terminal device is changed from the camera photographing mode to the control mode involving the wireless communication by the mode change control means, the end of the control operation in the control mode is monitored and the control operation is performed. 7. The mobile terminal device according to claim 6, further comprising mode return control means for returning the operation mode of the mobile terminal device to the camera photographing mode after the end of is detected. 8. A portable terminal device having a built-in camera and a light emitting unit, the first monitoring unit monitoring a request relating to execution of control accompanied by a wireless communication operation, and a light emitting drive of the light emitting unit. Second monitoring means for monitoring the request, and based on the monitoring results by the first and second monitoring means, to make the execution period of the wireless communication operation and the light emission drive period of the light emitting unit different from each other. A mobile terminal device, comprising: a control unit that controls at least one of the wireless communication operation and the light emission drive operation. 9. The control means includes at least the wireless communication operation when a request for execution of control involving the wireless communication operation is detected by the first monitoring means during a light emission drive period of the light emitting section. 9. The light emission drive operation of the light emitting unit is stopped during a control execution period.
The portable terminal device described. 10. The control unit including the wireless communication operation when the execution request of the control including the wireless communication operation is detected by the first monitoring unit during the light emission drive period of the light emitting unit. 9. The mobile terminal device according to claim 8, wherein the start of execution of is delayed after the end of the light emission drive period of the light emitting unit. 11. The light emitting drive start of the light emitting unit when the light emitting drive request for the light emitting unit is detected by the second monitoring unit during the execution period of the control involving the wireless communication operation. 9. The mobile terminal device according to claim 8, wherein is delayed after the end of the wireless communication operation. 12. The control means determines whether or not the remaining amount of battery or the output voltage value is equal to or more than a predetermined value. 9. The portable terminal device according to claim 8, wherein the drive operation is allowed, and the light emission drive operation of the light emitting unit is stopped during the execution period of the wireless communication operation when the drive operation is decreased below a predetermined value. 13. A mobile terminal device having a built-in camera and a light emitting unit, wherein a control mode involving wireless communication operation is executed in a state where a camera shooting mode including a light emission driving operation of the light emitting unit is set. And a monitoring means for monitoring a request relating to the wireless communication operation, and when the monitoring means detects an execution request of the control mode involving the wireless communication operation, the operation mode of the mobile terminal device is changed from the camera photographing mode to the wireless communication operation. A mobile terminal device, comprising: a mode change control means for changing to a control mode. 14. After the operation mode of the mobile terminal device is changed from the camera photographing mode to the control mode involving the wireless communication operation by the mode change control means, the end of the control operation in the control mode is monitored and the control is performed. 14. The mobile terminal device according to claim 13, further comprising mode return control means for returning the operation mode of the mobile terminal device to the camera photographing mode after the end of the operation is detected. 15. A portable terminal device comprising a camera and a solid-state light emitting element, and an image capturing mode setting means for selectively setting a still image capturing mode and a moving image capturing mode as the image capturing mode of the camera, and the image capturing mode setting means. When the still image capturing mode is set by the mode setting means, a pulsed light emission drive current is supplied to the solid state light emitting element in synchronization with the still image capturing timing of the camera to flash the solid state light emitting element. Supplying the wireless communication operation and the light emission drive current so that the execution period of the first control means, the wireless communication operation, and the supply period of the light emission drive current to the solid state light emitting element by the first control means are different. A mobile terminal device, comprising: a second control unit that controls at least one of the operations. 16. Prior to the supply of the light emission drive current to the solid state light emitting element by the first or second control means, an optimum light emission drive current value is obtained based on the brightness level of the imaged image signal obtained by the camera. The mobile terminal device according to claim 15, further comprising third control means for determining. 17. A mobile terminal device comprising a camera and a solid-state light emitting device, and an image capturing mode setting means for selectively setting a still image capturing mode and a moving image capturing mode as the image capturing mode of the camera, First control means for supplying a light emission drive current to the solid state light emitting element to cause the solid state light emitting element to emit light in a state where the moving image capturing mode is set by the image capturing mode setting means; A second control means for controlling at least one of the wireless communication operation and the light emission drive current supply operation so that a period for supplying the light emission drive current to the solid state light emitting element by the first control means is different. A mobile terminal device characterized by the above. 18. The first control means, in a state in which a moving image shooting mode is set by the shooting mode setting means,
Set the light emission period including the moving image capturing period of the camera,
18. The mobile terminal device according to claim 17, wherein the solid-state light-emitting element continuously emits light during the set light-emission period. 19. The first control means causes the solid state light emitting device to intermittently emit light in synchronization with a moving image capturing frame timing of the camera in a state where the moving image capturing mode is set by the capturing mode setting means. The mobile terminal device according to claim 17, wherein: 20. In the moving image capturing mode, when the image signals captured by the camera are selected and captured in frame units, the first control means sets the moving image capturing mode in a state where the moving image capturing mode is set. 18. The mobile terminal device according to claim 17, wherein light emission of the solid-state light emitting element is stopped during an imaging period of a frame to be discarded. 21. Based on a brightness level of a picked-up image signal obtained by the camera before and / or during the start of supply of a light emission drive current to the solid state light emitting element by the first or second control means. 18. The mobile terminal device according to claim 17, further comprising third control means for setting an optimum light emission drive current value. 22. A control unit having at least a wireless communication control function, a camera, a light emitting unit, a determination unit for determining whether or not the power supply level to the control unit is maintained at a predetermined level or higher, Monitoring means for monitoring the light emission drive request of the light emitting part, and the light emitting part when the light emission drive request is detected by the monitoring means in a state where the power supply level to the control part does not maintain a predetermined level or more. And a light emission drive control means for rejecting the light emission drive operation of the portable terminal device.