JPH065968B2 - Home bus system - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a home bus system capable of automatically charging a secondary battery of a portable terminal device connected to a Baumebus.

2. Description of the Related Art Conventionally, when a secondary battery is used as a power source for a portable terminal, it has been necessary to connect a power adapter to charge it when the output voltage of the secondary battery drops.

FIG. 3 shows the usage of a conventional portable terminal driven by a secondary battery. In FIG. 3, 18 is an IFU section, 19 is a terminal section,
20 is a secondary, and the battery 21 is a power adapter.

Problems to be Solved by the Invention However, in the case of the above-mentioned form, even if it is a portable terminal that originally does not need to be connected to a power source, the voltage of the secondary battery is constantly monitored and the power adapter is used when the supply voltage drops. It has the drawback of having to be charged using.

In view of the above problems, the present invention automatically receives power from a power supply device to charge a secondary battery when a decrease in the output voltage of the secondary battery of the terminal device is detected, thereby charging the secondary battery. The purpose is to eliminate the need for maintenance related to the power supply of the device.

Means for Solving the Problems In order to achieve the above object, the present invention includes a secondary battery driven terminal device having a first IFU unit and a battery voltage monitoring unit, and a second IFU unit for supplying power to a home bus. It has a power supply device that it has, and when the output power of the secondary battery of the terminal device that is driven by the secondary power supply decreases, the power is automatically supplied from the power supply device through the information channel of the home bus. It is configured to charge the receiving secondary battery.

Operation When the present invention detects a decrease in the output voltage of the secondary battery of the terminal device with the above configuration, it notifies the power supply device of that fact and charges the secondary battery via the information channel of the home bus. is there.

EXAMPLES Examples of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of a home bus system according to an embodiment of the present invention. In FIG. 1, 1a to 1c
Is an information channel, 2 is a control channel, 3 is a portable terminal driven by a secondary battery, 10 is a power supply device, and 15 is a home bus controller (hereinafter referred to as HBC) that manages the information channels 1a to 1c of the home bus. Is. FIG. 2 is a processing sequence when the output voltage of the secondary power source of the portable terminal is lowered and charging is performed from the power supply device.

Normally, the terminal unit 6 and the interface unit unit (hereinafter referred to as IFU unit) 4 in the portable terminal 3 are driven by the secondary battery 5. In this case, the output voltage of the secondary battery 5 gradually drops, but when the output voltage drops below a predetermined voltage value, the battery voltage monitoring unit 9 detects the “power supply voltage drop state” and notifies the terminal unit 6. By this notification, the terminal unit 6 notifies the power supply device 10 of the “power transmission request” via the control channel 2 using the IFU unit 4. Due to this notification, the power supply device 10 transmits power to the secondary battery 5 of the terminal device 3, so that the IFU unit 11 supplies the information channels 1a to 1c to the HBC that manages the information channels 1a to 1c of the home bus. Request the right to use one of the pairs. At this time, if there is a free channel in the information channels 1a to 1c, permission to use the channel is returned to the IFU unit 11. IFU
The unit 11 receives the permission to use the information channel from the HBC 15 and controls the switching circuit 14 in the power supply device 10 to connect the power supply unit 12 and the information channels 1a to 1c.

Next, the information channel connection request is transferred to the IFU unit 4 of the terminal device 3. When the IFU unit 4 receives the information channel connection request from the IFU unit 11, it controls the switching circuit 8 in the terminal device 3 to connect the secondary battery 5 and the information channels 1a to 1c. When the above-mentioned control is completed, the IFU unit 4
Notify that the information channel connection is completed. IFU
The unit 11 activates the power supply unit 12 at the time of receiving the information channel connection completion notification, and supplies the charging power to the secondary battery 5 in the terminal device 3 via the information channels 1a to 1c.
By the series of operations described above, charging of the secondary battery 5 in the terminal device 3 is automatically started.

Next, when the output voltage of the secondary battery 5 becomes a sufficiently high voltage due to the charging performed by this means, this time the battery voltage monitoring unit 9 detects that fact and the same as at the time of detecting the “power supply voltage drop state”. The “secondary battery charging completed state” is notified to the terminal unit 6. In response to this notification, the terminal unit 6 issues a "power transmission end request" to the IFU.
Power supply device 10 via control channel 2 using section 4
To notify. By this notification, I in the power supply device 10
The FU unit 11 controls the power supply unit 12 to stop power transmission, and also controls the switching circuit connecting the power supply unit 12 and the information channels 1a to 1c to disconnect the connection. Next IF
The U unit 11 transfers, to the IFU unit 4 in the terminal device 3, an instruction to open the exchange circuit connecting the secondary battery 5 and the information channels 1a to 1c, and the secondary battery 5 is transferred to the information channel 1a. Cut from ~ 1c. Further, I in the power supply device 10
The FU unit 11 sends information channels 1a to 1 to the HBC 15.
c The end-of-use notification is given, and the process of charging the secondary battery 5 in the terminal device 3 is completed.

Effects of the Invention By applying the present invention as described above, the output voltage of the secondary battery is monitored in a portable terminal driven by the secondary battery, or the secondary battery is charged using a power adapter. Operation is simplified and system maintenance work is simplified. Also, by connecting one power supply device to the home bus, rechargeable batteries in multiple portable terminals can be charged. It is also possible to reduce the total cost of the system.

[Brief description of drawings]

FIG. 1 is a block configuration diagram of a home bus system according to an embodiment of the present invention, FIG. 2 is a processing sequence diagram for charging a secondary battery in the home bus system, and FIG. 3 is a conventional portable terminal. It is a block diagram of a connected home bus system. 1a to 1c ... information channel, 2 ... control channel, 3
...... Portable terminal, 4 ... IFU section, 5 ... Secondary battery, 6
...... Terminal section, 7 ... Exchange circuit control signal line, 8 ... Exchange circuit, 9 ... Battery voltage monitoring section, 10 ... Power supply device, 1
1 ... IFU section, 12 ... power supply section, 13 ... exchange circuit control signal line, 14 ... exchange circuit, 15 ... HBC (home bus controller), 16 ... control channel, 18
...... Portable terminal, 19 ...... IFU section, 20 ...... Terminal section,
21 ... Secondary battery, 22 ... Power adapter.

Claims (1)

[Claims] 1. A home bus comprising a control channel using one pair of cables and an information channel using one or more pairs of cables, a first interface unit (hereinafter abbreviated as IFU) and an information channel. Connection between the second IFU and the information channel, and a terminal device including a first exchange circuit unit for connecting with the rechargeable secondary battery and a battery voltage monitoring unit for monitoring the output voltage of the rechargeable battery. A home bus controller (hereinafter referred to as an HBC) that includes a voltage supply device that includes a second exchange circuit unit and a power supply unit that supplies power to a terminal device, and a third IFU and a processing unit that manages use of the information channel. Abbreviated)
A home bus system having the following processing steps. (Step 1) In the terminal device, the battery voltage monitoring unit monitors the output voltage of the secondary battery and detects a decrease in the output voltage. (Step 2) When the battery voltage monitoring unit detects a decrease in the output voltage of the secondary battery, the battery voltage monitoring unit issues a power transmission request to the first IFU. (Step 3) The first IFU that has received the power transmission request from the battery voltage monitoring unit sends the power transmission request to the second IFU of the power supply device via the control channel. (Step 4) The second IFU that has received the power transmission request
Sends an information channel use request to the corresponding HBC via the control channel. (Step 5) The above H which has accepted the above channel use request
The BC checks the usage status of the information channel, and if there is an empty channel, sends the information channel usage permission to the second IFU via the control channel. (Step 6) The second IFU which has received the permission to use the information channel controls the second switching circuit unit to connect the power supply unit to the information channel. (Step 7) An information channel connection request is sent from the second IFU to the first IFU via the control channel. (Step 8) The first IFU which has received the information channel connection request connects the secondary battery to the information channel. (Step 9) A connection completion notification is sent from the first IFU to the second IFU via the control channel. (Step 10) The second IF that has received the connection completion notice
U starts power supply to the power supply unit and supplies power to the secondary battery via the information channel. (Step 11) The battery voltage monitoring unit monitors the output voltage of the secondary battery, and monitors whether or not the output voltage has returned to a predetermined output voltage. (Step 12) The battery voltage monitoring unit monitors the output voltage of the secondary battery, and when detecting that the output voltage has returned to a predetermined output voltage, notifies the first IFU of completion of charging, and One IFU is connected to the second I via the control channel.
Send a power transmission end request to the FU. (Step 13) The second IFU which has received the power transmission end request controls the power supply unit to stop the power supply, and controls the second exchange circuit unit to open the information channel, and An information channel release request is sent to one IFU via the control channel. (Step 14) The first IFU which has received the information channel release request controls the first switching circuit unit to release the information channel. (Step 15) The second IFU sends an information channel use end notification to the HBC.