JPH1032622A - Charging display system for telephone set - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify a constitution of a charger by displaying a charging state based on a detecting result of a charging detection part. SOLUTION: A charger 7 detects the existence of loading to a telephone set 1, and a control part 12 controls a charging circuit 8 to start charging to a secondary battery 2. A voltage detection part 10 always monitors the voltage varying part of a charging line 7a to inform a control part 12 of it, and the control part 12 judges the charging state of the secondary battery 2 by the voltage varying part of the charging line 7a and continues charging it becomes full. The telephone set 1 makes a display control part 4 to judge the existence of charging depending on the result of monitoring the voltage varying part of a charged power source inputted to a charging input terminal 6 by a charging detection part 3. At the time of the presence of charging, a display part 5 displays the presence of charging to unnecessitate the providing of a display function for the charger 7 to simplify the constitution of the charger 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a charge display system for a telephone.

[0002]

2. Description of the Related Art The technology relating to a conventional telephone charger is as follows.
For example, it is disclosed in Japanese Utility Model Laid-Open No. 5-76138.

FIG. 3 is a diagram described in the above-mentioned publication. In the figure, reference numeral 200 denotes a slave unit of a parent-child telephone, and 210 denotes a charger. The charger 210 includes a light emitting diode 211.
Is provided. When the light emitting diode 211 is attached to the charger 210 and the secondary battery of the telephone 200 is charged by the charger 210, the light emitting diode 211 blinks or lights to indicate that the user is charging. To inform. After the charging is completed, the light emitting diode 211 stops blinking or lighting, and notifies the user of the charging completion.

[0004]

However, in the above-described conventional charge display system, the presence or absence of charging is indicated by providing the light emitting diode 211 in the charger 210, so that the cost of the charger 210 can be reduced. There was a problem that it was difficult. That is, in order to operate the light emitting diode 211, a control circuit for the light emitting diode 211 is indispensable, and the control circuit must be additionally provided. After all, the light emitting diode 211 is added to the charger 210.
In addition, since the control circuit is provided, the number of components is inevitably increased, and it has been difficult to reduce the cost.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a charge display system for a telephone which can simplify the structure of a charger and reduce the cost of the charger.

[0006]

According to a first aspect of the present invention, there is provided a charge display system for a telephone, comprising: a telephone having a secondary battery as an internal power supply; and a charger for charging the secondary battery of the telephone. A charging detection unit configured to detect a charging voltage when the telephone is connected to the charger; and determining whether charging is performed based on a detection result by the charging detection unit. And a display unit for displaying the state of charge based on the result of the determination by the determination unit. Claim 2
The charge display system for a telephone according to claim 1, wherein:
The charge display system for a telephone according to the above, wherein the telephone is provided with a display panel for displaying a key operation result, and the display panel also serves as the display unit. The charge display system for a telephone according to claim 3, wherein the charge display system for a telephone according to claim 1 or 2, further comprising: an AC / DC conversion adapter for charging the secondary battery of the telephone; And a charging control unit for switching connection between charging by the charger and charging by the AC / DC conversion adapter.

According to the first aspect of the present invention, when the telephone and the charger are connected, the charging detector detects the charging voltage. Then, based on the detection result by the charge detection unit, the determination unit determines whether the battery is being charged,
The display unit displays the state of charge based on the determination result by the determination unit. In other words, the display of the telephone displays the state of charge, so that it is not necessary to provide the charger with a display function. Therefore, the configuration of the charger is simplified. According to the second aspect of the present invention, the telephone is provided with a display panel for displaying a key operation result, and the display panel also serves as a display unit. There is no need to add new components. Therefore, even when the configuration of the charger is simplified, there is no need to add new parts to the telephone, and the cost of the telephone does not increase. According to the third aspect of the invention, the connection between the charging by the charger and the charging by the AC / DC conversion adapter is switched by the charging control unit.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

[First Embodiment] FIG. 1 shows a first embodiment of a charge display system for a telephone according to the present invention.

In FIG. 1, for example, a telephone 1 in the form of a portable telephone has a secondary battery 2 as an internal power supply, a charging input terminal 6 for charging the secondary battery 2, and a secondary battery 2. A charging detection unit 3 that detects whether or not the charger 7 is connected and detects a charging voltage; a display unit 5 that performs display;
A display control unit (determination unit) 4 that determines the presence or absence of charging based on the detection result of the charge detection unit 3 and controls the display of the display unit 5 according to the determination result.

In this case, the telephone 1 has a display panel for displaying a key operation result, that is, a confirmation display of the key operation result when a telephone number is depressed, and information on telephone communication, for example, a call time. A display panel for displaying images is provided as standard. In the present embodiment, the display panel also serves as the display unit 5. That is, the display panel has a function as the display unit 5 in addition to the normal functions such as the above-described confirmation display and information display.

The charger 7 includes a charging circuit 8 for charging the telephone 1 through the charging line 7a, a voltage detecting unit 10 for detecting a voltage change of the charging line 7a, and a telephone based on the detection result of the voltage detecting unit 10. 1 and a control unit 12 that determines the presence / absence of connection and charging and controls the charging circuit 8.

Next, the operation will be described.

The charger 7 detects whether or not the telephone 1 is attached by monitoring the presence or absence of the voltage of the charging line 7a by the voltage detector 10. When detecting that the telephone 1 is attached, the control unit 12
Controls the charging circuit 8 and starts charging the secondary battery 2. The voltage detection unit 10 constantly monitors a change in the voltage of the charging line 7 a and transmits the voltage change to the control unit 12. The controller 12 determines the state of charge of the secondary battery 2 based on the voltage change of the charging line 7a, and continues charging until the secondary battery 2 is fully charged. When the battery is fully charged, the charging ends.

On the other hand, in the telephone 1 attached to the charger 7, the charge detection unit 3 monitors a change in the voltage of the charging power supply input to the charging input terminal 6 and transmits the result to the display control unit 4. In this case, the voltage of the charging line 7a on the charger 7 side and the voltage of the charging line 1a on the telephone 1 side are substantially the same, and the voltage detection unit 10 on the charger 7 side and the charging on the telephone 1 side The detection unit 3 monitors substantially the same voltage. In this sense, it should be noted that the charging detection unit 3 can be regarded as monitoring the voltage of the charging line 7a on the charger 7 side. The display control unit 4 to which the detection result of the charging voltage is transmitted from the charging detection unit 3.
Determines the presence or absence of charging based on the detection result of the charging detection unit 3, and controls the display unit 5 according to the determination result. That is, when it is determined that the battery is being charged, the display unit 5 displays "charging" to notify the user that the battery is being charged. Conversely, when it is determined that charging is not being performed or when charging is completed, the display indicating that charging is being performed on the display unit 5 is turned off, and the user is notified that charging is not being performed.

In the charging display system as described above,
Since the display of the state of charge is displayed by the display unit 5 provided on the telephone 1, it is not necessary to provide the charger 7 with a display function. Therefore, it is possible to simplify the configuration of the charger 7 and reduce the cost of the charger 7.

Further, since the display panel provided as a standard feature in the telephone 1 also serves as the display unit 5, it is not necessary to newly add a component to the telephone 1 when displaying the presence or absence of charging. Therefore, the configuration of the charger 7 is simplified and the
When the cost of the telephone 1 is reduced, the cost of the telephone 1 is not increased, and eventually the cost of the entire system can be reduced.

[Second Embodiment] FIG. 2 shows a second embodiment of the charge display system for a telephone according to the present invention.

A secondary battery 102, a charge detection unit 103, a display control unit (judgment unit) 1 in the telephone set 101 of the present embodiment.
The configuration and functions of the display unit 04, the display unit 105, the charge input terminal 108, and the charge line 101a are respectively described in the secondary battery 2, the charge detection unit 3, the display control unit 4, the display unit 5, and the charge in the telephone 1 of the first embodiment. Input terminal 6, charging line 1a
Since the configuration and function are the same, description thereof will be omitted.

Similarly, charging circuit 1 in charger 110
11, control unit 112, voltage detection unit 113, charging line 1
The configuration and function of 10a are the same as the configuration and function of the charging circuit 8, the control unit 12, the voltage detection unit 10, and the charging line 7a in the charger 7 of the first embodiment, respectively, and thus the description thereof is omitted.

The present embodiment is different from the first embodiment in that the telephone set 101 includes an AC / DC conversion adapter (hereinafter referred to as “A”) in addition to the charger 110 as charging means for the secondary battery 102.
C adapter ”) 114).

Therefore, the telephone set 101 includes a power supply terminal 109 for inputting power from the AC adapter 114, an AC adapter detection unit 107 for monitoring the voltage of the power supply terminal 109 and detecting whether the AC adapter 114 is connected, and an AC adapter detection unit 107. The current supplied to the power supply from the power supply terminal 109 is controlled based on the detection result of the
2 is further provided with a charging control unit 106 for applying a charging power supply.

In this case, the charging control unit 106 controls the charger 1
It has a function of switching the connection between the charger 110 and the AC adapter 114 so that only one of them is connected so that charging by the AC adapter 114 and charging by the AC adapter 114 cannot be performed simultaneously. Also, the display control unit 1
04 is connected to both the charge detection unit 103 and the AC adapter detection unit 107.

Next, the operation will be described. Charger 11
Since the charging operation by 0 is the same as the operation in the first embodiment, only the operation at the time of charging by the AC adapter 114 will be described here.

When the AC adapter 114 is connected to the telephone 101, the AC adapter detecting unit 107
When the connection of the C adapter 114 is detected, the charging control unit 1
06 and the display control unit 104. Charge control unit 10
6 controls the power supplied from the power supply terminal 109 at a constant current to start charging the secondary battery 102. Charge detection unit 103
Detects a change in the voltage of the charging power supply to the secondary battery 102 and reports the detection result to the charging control unit 106 and the display control unit 10.
Tell 4 The display control unit 104 determines the presence or absence of charging based on the detection result of the charge detection unit 103, and controls the display unit 105 according to the determination result. That is, when it is determined that the battery is being charged, the display unit 105 displays "charging" to notify the user that the battery is being charged. When charging is completed, the charging control unit 106
Stops charging the secondary battery 102. In addition, the display control unit 104 turns off the charging display on the display unit 105 and notifies the user of the completion of charging.

In the charging display system of the present embodiment, the same operation and effects as those of the first embodiment can be obtained. In addition, since the charging control unit 106 is provided, charging by the charger 110 and AC adapter 1
14 can be switched for connection with charging, and a wide range of charging functions can be provided.

Note that the present invention is not limited to the above-described embodiment, but may be configured as follows. a) Instead of using the telephones 1 and 101 in the form of a portable telephone, use a telephone in any form. b) In the telephone 1, instead of using the display panel also as the display unit 5, a new display unit is provided as the display unit 5 without using the display panel. Also in this case, the intended purpose of simplifying the configuration of the charger is achieved.

[0028]

According to the charge display system for a telephone of the present invention, the following effects can be obtained. According to the charging display system for a telephone according to the first aspect, the display of the state of charge is displayed by the display unit provided on the telephone, so that it is not necessary to provide the charger with a display function. Therefore, the configuration of the charger can be simplified, the cost of the charger can be reduced, and the intended purpose can be achieved. According to the charging display system for a telephone according to the second aspect, since the display panel also serves as the display unit, it is not necessary to newly add a component to the telephone when displaying the presence or absence of charging. Therefore, in addition to simplifying the configuration of the charger and reducing the cost of the charger, it is possible to reduce the cost of the entire system without increasing the cost of the telephone. Claim 3
According to the charge display system for a telephone described in the above, the provision of the charge control unit allows connection switching between charging by the charger and charging by the AC / DC conversion adapter, thereby providing a wide range of charging functions. Can be.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a first embodiment of a charge display system for a telephone according to the present invention.

FIG. 2 is a block diagram showing a second embodiment of the charge display system for a telephone according to the present invention.

FIG. 3 is a perspective view showing an example of a conventional charge display system for a telephone.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Telephone 2 Secondary battery 3 Charge detection part 4 Display control part (determination part) 5 Display part 7 Charger 101 Telephone 102 Secondary battery 103 Charge detection part 104 Display control part (determination part) 105 Display part 106 Charge control part 110 Battery charger 114 AC / DC conversion adapter

Claims (3)

[Claims] 1. A telephone provided with a secondary battery as an internal power source, and a charger for charging the secondary battery of the telephone, wherein the telephone has a connection between the telephone and the charger. A charging detector for detecting a charging voltage when the charging is performed; a determining unit for determining whether or not charging is performed based on a detection result by the charging detecting unit; and a display of a charging state based on the determination result by the determining unit. A charging display system for a telephone, comprising: 2. The charge display system for a telephone according to claim 1, wherein the telephone has a display panel for displaying a key operation result, and the display panel also serves as the display unit. A charge display system for a telephone. 3. The charge display system for a telephone according to claim 1, further comprising: an AC / DC conversion adapter for charging the secondary battery of the telephone, wherein the telephone has a function of charging by the charger. A charge display system for a telephone, comprising a charge control unit for switching connection with charge by an AC / DC conversion adapter.