JP4070917B2 - Mobile terminal device having communication function and response method thereof - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a mobile terminal device having a communication function and a communication response method thereof, and in particular, suppresses a peak current of the mobile terminal device and improves battery use efficiency.
[0002]
[Prior art]
In recent years, mobile terminal devices incorporating PHS communication functions have been introduced for business use in various industries, and the necessary data can be transmitted from the center to the mobile terminal device of the person in charge of sales, Data is transferred to the center to improve work efficiency.
[0003]
In addition to the normal data processing and communication functions, the mobile terminal is equipped with various functions. It has a built-in scanner and printer function to read data from paper and print invoices and receipts. A model to be used has also been developed.
[0004]
A rechargeable battery such as a lithium ion secondary battery is generally used as a power source for driving the portable terminal device. However, in the industry where a large number of portable terminal devices are used, priority is given to easy maintenance. In view of the above, introduction of a portable terminal device using a dry battery as a driving power source has been studied.
[0005]
[Problems to be solved by the invention]
However, a dry battery has a higher internal resistance than a lithium ion secondary battery and the like, and a voltage drop caused by current consumption is large. For this reason, in a portable terminal device having a scanner and printer function as well as a PHS communication function, the following problem occurs when an incoming call is received from the PHS while a device such as a scanner or printer that consumes a large current is operating.
[0006]
When the PHS communication unit of the portable terminal device detects an incoming call in the “in operation” mode, it transmits a response radio wave according to a normal PHS communication procedure even when the high-current device is activated. Along with this radio wave transmission, a current consumption in ampere flows, and thus a larger voltage drop occurs. When the battery voltage falls below the minimum voltage that guarantees the stable operation of the logic circuit of the portable terminal device due to this voltage drop, the stored data maintenance function is stopped and the data is destroyed.
[0007]
In order to avoid such a situation, even if the operation of the high-current device overlaps with the transmission of PHS radio waves, “voltage drop due to operation of the large-current device + PHS radio wave transmission Considering the “voltage drop”, it is necessary to raise the allowable level of the battery voltage in advance, and when the battery voltage falls below the allowable level due to discharge, it is necessary to stop using the battery.
[0008]
As a result, even a battery that has a remaining battery level that can still be operated in a steady state is prepared for a large peak current, so that its use must be discontinued and the use efficiency of the dry battery decreases.
[0009]
The present invention responds to these problems, and an object of the present invention is to provide a mobile terminal device having a communication function that can suppress peak current and improve the use efficiency of a power source battery, and a response method thereof. It is said.
[0010]
[Means for Solving the Problems]
Therefore, in the present invention, in a portable terminal device including a communication unit, an information terminal unit, and a battery for power supply, the information terminal unit is provided with a high-current device such as a printer or a scanner, and a display unit, and the communication unit is large. If an incoming call is received while the current device is running, the information terminal unit is notified that the incoming call has been received without responding, and the display unit of the information terminal unit displays it with a sound or message. Yes.
[0011]
In addition, in a communication response method of a portable terminal device including a communication unit, an information terminal unit, and a dry battery for power supply, when an incoming call is received during activation of a large current device such as a printer or a scanner provided in the information terminal unit The communication unit waits for the end of the operation of the large current device without making a response, and makes a call from the communication unit to the destination.
[0012]
Therefore, it is possible to suppress the magnitude of the peak current when the activation of the high current device and the incoming call overlap, making it possible to set the battery voltage usage limit level low and increasing the usage efficiency of the power source battery. be able to.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
As shown in FIG. 1, the mobile terminal device according to the embodiment of the present invention provides power to a PHS communication unit 1 that performs PHS communication, an information terminal unit 2 having a data processing function, a PHS communication unit 1, and an information terminal unit 2. The PHS communication unit 1 includes a reception unit 11 that receives data, a transmission unit 12 that transmits data of the information terminal unit 2, and a PHS control unit 13 that controls PHS communication. The information terminal unit 2 includes a high-current device 22 that consumes a large amount of current, such as a scanner or a printer, a display unit 23 that displays the operating state of the information terminal unit 2, and an input for a user to perform an input operation. Unit 24 and a terminal control unit 21 for controlling the operation of the information terminal unit 2.
[0014]
In this portable terminal device, the PHS communication unit 1 can take a “monitoring” mode that does not exist in a normal PHS terminal, in addition to a “in operation” mode similar to that of a normal PHS terminal. The PHS communication unit 1 in the “in operation” mode waits in the normal standby mode, and when there is an incoming call, responds according to the normal PHS communication procedure and transfers the data received by the receiving means 11 to the information terminal unit 2 .
[0015]
On the other hand, when there is an incoming call, the PHS communication unit 1 in the “monitoring” mode does not respond to the other party, but only informs the information terminal unit 2 that there is an incoming call. Therefore, the other party gets the same reaction as when calling the PHS terminal that is turned off.
[0016]
The mode switching of the PHS communication unit 1 is performed by the user operating an external switch. When the large current device 22 of the information terminal unit 2 is activated, the terminal control unit 21 A mode switching command to the “monitoring” mode is issued, and the PHS control unit 13 that has received the command switches to the “monitoring” mode.
[0017]
For this reason, when the large current device 22 of the information terminal unit 2 is operating, it is always in the “monitoring” mode, and even if there is an incoming call while the large current device 22 is operating, no response radio wave is transmitted.
[0018]
FIG. 2 shows sequences according to the states of the PHS communication unit 1 and the information terminal unit 2. The PHS communication unit 1 takes the “operating” mode or the “monitoring” mode, and the information terminal unit 2 takes the “operating” or “stopped” state.
[0019]
FIG. 2A shows a case where the PHS communication unit 1 is in “in operation” mode and the information terminal unit 2 is in “operation”. When there is a call from the center, the PHS communication unit 1 in the standby state responds and receives data sent from the center. On the other hand, the PHS communication unit 1 notifies the information terminal unit 2 of transmission of the received data, and when the information terminal unit 2 responds, the received data is transferred to the information terminal unit 2.
[0020]
FIG. 2B shows a case where the information terminal unit 2 is starting the large current device 22 and the PHS communication unit 1 is in the “monitoring” mode. When there is a call from the center, the PHS communication unit 1 notifies the information terminal unit 2 to that effect and does not respond to the center. Upon receiving this notification, the terminal control unit 21 of the information terminal unit 2 displays a beep and a message from the display unit 23 to notify the user that there is an incoming call.
[0021]
When the operation of the large current device 22 is completed, the terminal control unit 21 sends an inquiry instruction to instruct an inquiry to the center to the PHS control unit 13. In response to this, the PHS communication unit 1 makes a call to the center, receives data transmission from the responding center, and transfers it to the information terminal unit 2.
[0022]
The inquiry instruction to the PHS control unit 13 after the operation of the large current device 22 is finished may be performed by the terminal control unit 21 based on the input operation performed by the user from the input unit 24.
[0023]
FIG. 2C shows a case where the PHS communication unit 1 is in “in operation” mode and the information terminal unit 2 is in “stopped” mode. When there is a call from the center, the PHS communication unit 1 activates the information terminal unit 1. When there is a response from the activated information terminal unit 2, the PHS communication unit 1 returns a response to the center and receives data sent from the center. On the other hand, the information terminal unit 2 is notified of the transmission of the received data, and when the information terminal unit 2 responds, the received data is transferred to the information terminal unit 2.
[0024]
FIG. 2D illustrates a case where the PHS communication unit 1 is in the “monitoring” mode and the information terminal unit 2 is “stopped”. When there is a call from the center, the PHS communication unit 1 activates the information terminal unit 1. When there is a response from the activated information terminal unit 2, the PHS communication unit 1 notifies that there is an incoming call. After responding to this notification, the information terminal unit 2 sends an inquiry instruction for instructing an inquiry to the center to the PHS control unit 13. In response to this, the PHS communication unit 1 makes a call to the center, receives data transmission from the responding center, and transfers it to the information terminal unit 2.
[0025]
Thus, in this portable terminal device, when the large current device 22 is activated, the PHS communication unit 1 takes the “monitoring” mode. In this “monitoring” mode, radio waves are not transmitted even when there is an incoming call. Therefore, the current consumption is smaller and the voltage drop is smaller than in the “in operation” mode. Therefore, the magnitude of the peak current when the activation of the large current device 22 and the incoming PHS are overlapped can be suppressed.
[0026]
Further, in this “monitoring” mode, although there is no response, it can be recognized that there is an incoming call. Therefore, after the operation of the high-current device 22 is completed, it is possible to call the center and acquire data, which is very different from the case where the PHS communication unit is turned off and the PHS operation is stopped. It is.
[0027]
Here, the case where the other system is a center having a known telephone number has been described. However, when an incoming call is received from the other system, the telephone number is stored in the PHS control unit 13. Even if there is an incoming call from an arbitrary party during the “monitoring” mode, it is possible to obtain data by inquiring the other party at a later time.
[0028]
In the embodiment, the case where a dry battery is used as the power supply battery has been described. However, suppressing the peak current of the mobile terminal device is effective in improving the use efficiency of the battery even when another battery is used. .
[0029]
【The invention's effect】
As is clear from the above description, the mobile terminal device of the present invention can suppress the peak current even when the activation of the installed large current device overlaps the incoming PHS. Therefore, it becomes possible to set the use limit level of the battery voltage low, and it is possible to increase the use efficiency when using a dry battery or the like as the drive power source of this apparatus.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a configuration of a mobile terminal device according to an embodiment of the present invention;
FIG. 2 is a diagram illustrating a sequence of the mobile terminal device according to the embodiment.
[Explanation of symbols]
1 PHS communication unit 2 Information terminal unit 3 Dry cell
11 Receiving means
12 Transmission method
13 PHS controller
21 Terminal control unit
22 High current device
23 Display
24 Input section

Claims (4)

In a mobile terminal device including a communication unit, an information terminal unit, and a power source battery,
The information terminal unit includes a high-current device and a display unit,
When there is an incoming call while the large current device is activated, the communication unit notifies the information terminal unit that the incoming call has been received without performing a response, and the display unit of the information terminal unit makes a sound or A portable terminal device characterized by displaying it in a message. The portable terminal device according to claim 1, wherein when the operation of the large current device is completed, the communication unit calls the destination of the incoming call in accordance with an instruction from the information terminal unit. The portable terminal device according to claim 1, wherein the power supply battery is a dry battery. In a communication response method of a portable terminal device including a communication unit, an information terminal unit, and a dry battery for power supply,
When an incoming call is received during activation of the large current device provided in the information terminal unit, no response is made, and the end of the operation of the large current device is waited for from the communication unit. A communication response method for a mobile terminal device, characterized by calling

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