JPH08154077A - Charger device with optical communication function - Google Patents

Abstract

PURPOSE: To enable the transmission and reception between a terminal equipment and a host even if the power supply from an external power source does not exist by providing an optical communication block where the battery of the terminal equipment is made a power source on a charger device charging the rechargeable battery of the terminal equipment. CONSTITUTION: In the charging of the chargeable battery 13 of a terminal equipment 2, a power supply impression is performed to the charge control block 6 of a charger device 1 from an external power source 3, the power supply is changed to charge current in the block 6 and the current is impressed on an electrode 8 via a diode 7. The electrode 8 and the electrode 14 of the terminal equipment 2 are connected and charge current is impressed on the battery 13. The block 6 performs rapid charge, standard charge and trickle charge and performs a control so as not to generate excess charge. At this time, a changeover switch 12 is in its state and the charge current from the block 6 becomes only the charge to the terminal equipment 2. When the device 1 is connected to the terminal equipment 2 and data 16 is transmitted to a host 5, the switch 12 is switched to A and the power source of the external power source 3 is directly impressed on an optical communication block 11. As a result, the optical communication part 10 of the device 1 and the optical communication part 15 of the terminal equipment 2 becomes states in which optical communication becomes possible.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a circuit of a charger having an optical communication function. Data can be transmitted / received to / from the host by communication.

[0002]

2. Description of the Related Art A conventional charger device 1 charges a battery for a terminal 2 by supplying power from an external power source 3. Further, the optical communication block 4 as a device having only an optical communication function can transmit and receive data to and from the host 5 by supplying power from the outside. When each device has a single function (only the optical communication function, only the charger), it operates only by the supply of the external power source 3, and the outer shape of each device is also different. (See Fig. 4)

[0003]

In the conventional charger device, when it is desired to use the optical communication function, the charger device does not operate without an external power supply and is dependent on the usage environment. Further, since the use of the external power supply is fixed, the charger device with an optical communication function has a small use range.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and is a charger device for charging a battery of a terminal having a rechargeable battery. The present invention proposes a charger device having an optical communication function, which has an optical communication block using a battery as a power source.

[0005]

In the present invention, the optical communication block is arranged in the charger device, and the power supply to the optical communication block is switched so that not only the external power supply but also the battery of the terminal can be used as the power supply. ing.

[0006]

An embodiment of the present invention will be described with reference to the accompanying drawings. FIG. 1 is an electrical block diagram in a state where an external power source is used. The charger device 1 is connected to the charging control block 6 for charging the battery of the terminal device 2 by the power supply from the external power source 3 and the electrode 14 of the terminal device 2 from the charging control block 6 via the diode 7. The electrode 8 is arranged. The charger device 1 is further provided with an optical communication block 11 having a host communication unit 9 for performing data communication with the host 5 and an optical communication unit 10 for performing data communication with the terminal 2 by optical communication. . Here, the power from the external power source 3 is directly applied to the charging control block 6, but the optical communication block 11
Is applied via a changeover switch 12. The terminal 2 has an electrode 14 that is connected to the electrode 8 of the charger device 1 and receives a power source for charging the rechargeable battery 13.
And an optical communication unit 15 for performing optical communication with the optical communication block 11 of the charger device 1, and the optical communication unit 15 includes data 16
Data is used for communication.

Now, charging the rechargeable battery 13 of the terminal 2
Power is applied from the external power source 3 to the charging control block 6 of the charger device 1, and a charging current is generated by the charging control block 6 and applied to the electrode 8 via the diode 7. Electrode 8
And the electrode 14 of the terminal 2 are connected, and a charging current is applied to the charging battery 13. The charging control block 6 can perform quick charging, standard charging, trickle charging, etc., and controls so as not to cause overcharging. At this time, the changeover switch 12 is in the OFF state, and the charging current from the charging control block 6 only charges the terminal 2. here,
Quick charging is full charge for a short time (about 1 hour), standard charging is 8
Full charge for about an hour or trickle charge means a small amount of current for a long time.

Next, when the terminal device 2 is connected to the charger device 1 and the data 16 of the terminal device 2 is transmitted to the host 5 by communication, the changeover switch 12 is switched to A and the external power source 3 is used.
By directly applying the power source from the optical communication block 11 to the optical communication block 11, the optical communication unit 10 of the charger device 1 and the optical communication unit 15 of the terminal device 2 can perform optical communication.

In the other case where the terminal device 2 is connected to the charger device 1 and the data 16 of the terminal device 2 is transmitted to the host 5 by communication, the changeover switch 12 is switched to B and the external power source 3 is used.
In the state in which the battery is removed (see FIG. 2), the optical communication unit 10 of the charger device 1 and the optical communication unit 15 of the terminal device 2 are in a state where optical communication can be performed. This is from the rechargeable battery 13 of the terminal 2 to the electrode 1
Power is applied to the optical communication block 11 from the changeover switch 12 via 4 and 8. With this, the optical communication unit 10 of the charger device 1 and the optical communication unit 15 of the terminal device 2 are in a state capable of performing optical communication. At this time, the electrode 8 of the charging device 1
From the charging control block 6 to the charging control block 6, the application of power is blocked by the diode 7.

Another embodiment in which the changeover switch is not used will be described with reference to FIG. Reference numerals use the numbers from the previous example unless otherwise stated. Optical communication block 11
And the electrode 8 are connected to each other, and the connection point is connected to the charge control block 6 via the diode 7.

By using this circuit, when the external power source 3 is connected, it can be charged by the power source from the external power source 3 and the power source of the optical communication block 11 can be secured. Further, even when the external power supply 3 is not provided, the power is stored in the rechargeable battery 13 of the terminal 2 and applied to the optical communication block 11 from the electrodes 14 and 8. Also in this case, the diode 7 prevents the backflow of current.

[0012]

Since the present invention is configured as described above, data transmission / reception between the terminal and the host is possible even when the power supply from the outside is impossible. Further, the charging control block and the optical communication block are respectively modularized, and various types of chargers can be configured without changing the outer shape.

[Brief description of drawings]

FIG. 1 is an electrical block diagram of a first embodiment.

[Figure 2] Electrical block diagram without external power supply

FIG. 3 is an electrical block diagram without a changeover switch.

FIG. 4 is an electrical block diagram of a conventional charging device.

[Explanation of symbols]

 1 Charger Device 2 Terminal 3 External Power Supply 4 Optical Communication Block 5 Host 6 Charge Control Block 7 Diode 8 Electrode 9 Host Communication 10 Optical Communication Unit 11 Optical Communication Block 12 Changeover Switch 13 Rechargeable Battery 14 Electrode 15 Optical Communication Unit 16 Data

Claims (1)

[Claims] 1. A charger device for charging a battery of a terminal device having a rechargeable battery, comprising: an optical communication block powered by the battery of the terminal device. Equipment.