JPH0389811A - Electronic apparatus - Google Patents

Abstract

PURPOSE:To share the connection terminal between a battery and other power supplies on the electronic apparatus side by providing a means for informing or indicating an electronic apparatus body whether the power supply is a battery power supply or not, and also by providing the electronic apparatus body with a mean for identifying whether the power supply is a battery power supply or not. CONSTITUTION:When a battery pack 1 is connected with an electronic apparatus 10, a battery pack identifying signal generation circuit 5 is provided at the battery pack and an AC-DC adapter 3 is provided with an adapter identifying signal generation circuit 6. The electronic apparatus body 10 confirms an identifying signal inputted from a connection terminal 8 and examines, in the case of the battery pack 1, whether the output voltage of a battery 2 is within a range where the electronic apparatus body 10 can operate. But the AC-DA adapter 3 starts operation without detecting a residue. Thus, it is possible to share the connection terminal 8 of the battery between the battery and other power supplies in the electronic apparatus 10.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to electronic equipment, and in particular to an electronic device that can be connected to either a battery power supply device powered by a battery or other types of power supply devices and used together as a power source. The present invention relates to an electronic device consisting of an electronic device main body configured as follows, and a power supply device connected to the main body.

[Prior art] Conventional electronic devices of this type include, for example, those shown in FIGS. 6 and 7.
As shown in the figure, a battery bag 101 has a battery 102 housed in a housing. Alternatively, an AC-DC adapter 103 that converts AC commercial power supply voltage into a predetermined DC voltage and outputs the same can be connected to the electronic device body 110 through the connection terminal 107 and used together as a power source. be. In this case, two connection terminals (positive and negative) 107
．． 107 is a battery bag 101 and an AC-DC adapter 10
3).

In such electronic devices, for example, when the control circuit 113 of the electronic device main body 110 uses SRAM to store data, a drop in power supply voltage during operation is undesirable, the battery back 101 is used. In order to allow operation of the electronic device main body 110 only when there is sufficient remaining capacity of the battery 102 when the battery 102 is
A remaining amount detection circuit 109 is attached to the control circuit 113 to detect the remaining amount of capacity. The remaining capacity detection circuit 109 includes a comparator and the like, and detects the remaining capacity of the battery 102 based on the output voltage of the battery 102.

Then, the control circuit 113 uses the remaining amount detection circuit 109 to detect the remaining amount according to the processing procedure shown in FIG. 8 when the power switch of the electronic device main body 110 is turned on.

That is, first, the load resistance of the electronic device main body 110 is changed via a circuit not shown, so that a load current several times the normal maximum load current flows through the power line of the electronic device main body 110 (step 511).

Next, the remaining capacity detection circuit 109 checks whether the output voltage of the battery 102, which drops due to this energization, is within the power supply voltage range in which the electronic device main body 110 can operate (step 51).
2).

If the output voltage is below the operable power supply voltage range, a display means (not shown) displays a message indicating that the remaining capacity of the battery is low (step 513).
) prompting the user to replace the battery 102 in the battery bag 101 or with the AC-DC adapter 103;
The normal operation of the electronic device main body 110 is then prohibited.

If the voltage of the electronic device main body 110 is within the voltage range in which the electronic device main body 110 can operate, operation is permitted and the operation is started (step 514).

In this manner, when the remaining capacity of the battery 102 of the battery bag 101 is low, the operation of the electronic device main body 110 is prohibited, and problems such as malfunction and data destruction can be avoided.

[Problem to be Solved by the Invention 1] However, in the above conventional configuration, the electronic device main body 11
Since it is not determined whether the battery bag 101 or the AC-DC adapter 103 is connected to the 0, even if the battery bag 101 is connected, the AC-DC adapter 103 is not connected. Similarly, when the power is turned on, the remaining battery power detection process as shown in FIG. 8 is performed. For this reason, it is necessary to design the current capacity of the AC-DC adapter 103 to be larger than the originally necessary capacity, and this becomes an obstacle in sharing the connection terminal 107 between the battery bag 101 and the AC-DC adapter 103. There was a problem.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems in this type of electronic equipment, and to make it possible to share connection terminals between a battery power supply device and other types of power supply devices.

[Means for Solving the Problems 1] In order to solve the above problems, according to the present invention, either a battery power supply device that supplies power by a battery or another type of power supply device can be connected and used together as a power source. In an electronic device consisting of an electronic device main body configured as shown in FIG. A configuration is adopted in which the main body of the electronic device is provided with means for identifying whether or not the power supply device is a battery power supply device based on the notification or instruction from the power supply device connected to the main body.

[Function 1] According to such a configuration, the electronic device main body can identify whether the power supply device connected to the electronic device main body is a battery power supply device.

[Example] Hereinafter, the present invention will be described in detail based on the example shown in the drawings. Here, as in the conventional example described above, an electronic device is exemplified in which either a battery bag or an AC-DC adapter is connected to the electronic device main body and both are used as a power source.

FIRST EMBODIMENT FIGS. 1 and 2 illustrate a configuration related to power supply identification between an electronic device main body and a battery bag or an AC-DC adapter in an electronic device according to a first embodiment of the present invention.

In FIG. 1, reference numeral 1 designates a battery bag of a battery power supply device which houses a battery 2 in a housing. Further, in FIG. 2, reference numeral 3 denotes an AC-DC adapter that converts the commercial AC power voltage applied via the AC plug 4 into a predetermined DC voltage and outputs the same. The battery pack 1 and the AC-DC adapter 3 are connected to the electronic device body 10 through a common connection terminal 7.7. The electronic device main body IO is provided with a remaining capacity detection circuit 9 consisting of a comparator and the like for detecting the remaining capacity of the battery, as in the case of the conventional example. Further, the control circuit 13 of the electronic device main body 10 is composed of a microcomputer or the like.

Here, the difference from the conventional method is that the battery bag 1 generates an identification signal that notifies the electronic device main unit IO that the connected power supply device is the battery bag 1 when the battery bag 1 is connected to the electronic device IO. , a battery pack identification signal generation circuit 5 that outputs to the electronic device main body IO is provided. Also AC-
Similarly, the electronic device main body 10 is connected to the DC adapter 3.
An adapter identification signal generation circuit 6 for generating an identification signal for identifying the C adapter 3 is provided.

In this case, we only need to identify two types of power supplies, so
The specific configuration of the identification signal generation circuits 5 and 6 may be quite simple. For example, the battery pack identification signal generation circuit 5 is assumed to generate a low level signal of the logic level of the control circuit 13, and the adapter identification signal generation circuit It is assumed that the circuit 6 generates a high level signal. The output signal of the identification signal generation circuit 5.6 is inputted to the control circuit 13 of the electronic device main body 10 via the common connection terminal 8. Control circuit 1
3 identifies whether the power supply device connected to the electronic device main body 10 is the battery bag 1 or the AC-DC adapter 3.

Under such a configuration, the control circuit 13 of the electronic device main body IO
When the power is turned on, the following processes related to identifying the power supply device and detecting the remaining battery capacity are performed in the procedure shown in FIG.

That is, first, in step St in FIG. 3, the aforementioned identification signal inputted from the connection terminal 8 is confirmed.

Next, in step S2, it is determined whether or not the power supply device connected to the electronic device body 1O is the battery bag 1, based on the confirmed identification signal.

If the battery is back up, then in step S3, a current several times the normal maximum load current is caused to flow through the power line of the electronic device body 10, as in the case of the conventional example described above, and in step S4, the current is lowered by energization. It is checked whether the output voltage of the battery 2 of the battery pack 1 is within the power supply voltage range at which the electronic device main body 10 can operate. If the voltage is below the operable voltage, a display means (not shown) displays a message indicating that the remaining battery capacity is low in step S5.
0 operation is prohibited, and if the voltage value is operable, the process moves to step S6 and the operation is started.

On the other hand, if the connected power supply device is identified in step S2 as AC-DC adapter 3 instead of battery bag 1, then step S3. The remaining amount detection in S4 is not performed, and the process directly proceeds to step S6 to start the operation.

As described above, in this embodiment, the remaining battery level detection process is executed only when the battery pack l is connected, and the AC-D
Since the remaining power is not detected when the AC adapter 3 is connected, there is no need to set the current capacity of the AC-DC adapter 3 higher than the originally required capacity, and the battery back L and A
Connect with C-DC adapter 3! Terminal 7 can be shared.

Second Embodiment Next, FIGS. 4 and 5 respectively show an electronic device main body, a battery bag or an AC cable of an electronic device according to a second embodiment of the present invention.
In both figures, which explain the configuration related to the power supply identification of the DC adapter, parts that are common or corresponding to those in FIGS. 1 and 2 of the first embodiment are given common reference numerals. The explanation of the parts will be omitted.

In this embodiment, in order to identify the battery bag l and the AC-DC adapter 3, the LE
A photointerrupter consisting of a DII and a phototransistor 12 is provided in the electronic device main body 10. A recess 14 is provided in a part of the housing of the electronic device body 10 that faces the connected battery bag l or AC-DC adapter 3, and an LED II and a phototransistor 12 are arranged facing each other with the recess 14 in between. and performs detection for identification. The output signal of the photointerrupter, ie, the output signal of the phototransistor 12, is input to the control circuit 13.

On the other hand, in the case of the battery bag l, the electronic device main body 10
An optical path blocking plate 15 that fits into the recess 14 and blocks the optical path between the LED II and the phototransistor 12 is protruded from a portion facing the recess 14 when connected to the LED II. In contrast, the AC-DC adapter 3 is not provided with the optical path blocking plate 15.

With this configuration, the battery bag l can be connected to the electronic device main body lO.
When connected to LED II, the light path blocking plate 15
, the optical path between the phototransistors 12 is blocked, and the AC-
When the DC adapter 3 is connected, the optical path is not blocked, so the control circuit 13 can identify the power supply device connected to the electronic device body 10 based on the output signal of the phototransistor 12. That is, the type of power supply device is indicated and identified depending on the presence or absence of the optical path blocking plate 15.

According to this embodiment, although the structure is more complicated than that of the first embodiment, it is not necessary to provide the connection terminal 8 of the first embodiment, and it is advantageous in terms of environmental resistance such as electrostatic withstand voltage. .

[Effects of the Invention] As is clear from the above description, the present invention is configured so that either a battery power supply device that supplies power by a battery or another type of power supply device can be connected and used together as a power source. In an electronic device consisting of an electronic device main body and a power supply device connected to the main body, the power supply device is provided with means for notifying or instructing the electronic device main body whether or not the power supply device itself is a battery power supply device, Since the main body of the electronic device is provided with a means for identifying whether or not the power supply device is a battery power supply device based on the notification or instruction from the power supply device connected to the main body, it is possible to The electronic device itself can identify whether or not the power supply device is a battery power supply device.1 For example, processing that is necessary only for battery power devices, such as detecting the remaining battery capacity, can be performed on the electronic device itself. This can be done only when the battery is connected, and has excellent effects such as the ability to share the connection terminals of power supplies without having to design the current capacity of power supplies other than battery power supplies to be larger than the originally required capacity. is obtained.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing a configuration related to identifying the power supply device of the electronic device main body and the battery bag of the electronic device according to the first embodiment of the present invention, and FIG. 2 shows the electronic device main body of the same embodiment and the AC-
FIG. 3 is a block diagram showing the configuration related to the power supply identification of the DC adapter; FIG. 3 is a flowchart showing the control procedure of the power supply identification and remaining battery power detection processing by the control circuit in FIGS. 1 and 2;
FIG. 4 is a block diagram showing a configuration related to power source identification of the electronic device main body and battery bag according to the second embodiment, and FIG. 5 is a block diagram showing a configuration related to power source identification of the electronic device main body and AC-DC adapter of the same embodiment. Block diagram, Figure 6 is a block diagram showing the configuration of the conventional electronic device body and battery bag, Figure 7 is a block diagram showing the configuration of the conventional electronic device body and AC-DC adapter, and Figure 8 is the same conventional block diagram. It is a flowchart which shows the procedure of battery remaining amount detection processing in an example. l-...Battery bag 2...Battery 3...AC-
DC adapter 4...-AC plug 5...Battery back identification signal generation circuit 6...Adapter identification signal generation circuit 7...Connection terminal 8...Identification signal connection terminal 9...Remaining amount detection circuit 10-...Electronic equipment body 11--L E Dl 2-
...Phototransistor 13--Control circuit 15...-Optical path blocking plate i;6
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Claims (1)

[Claims] 1) An electronic device consisting of an electronic device main body that is configured to be connected to either a battery power supply device that supplies power by a battery or another type of power supply device and used as a power source, and a power supply device that is connected to the main body. In the equipment, the power supply device is provided with a means for notifying or instructing the main body of the electronic device whether or not the power supply device itself is a battery power supply device, and the main body of the electronic device is provided with a means for notifying or instructing the main body of the electronic device whether or not the power supply device itself is a battery power supply device, and the main body of the electronic device is provided with a means for notifying or instructing the main body of the electronic device whether or not the power supply device itself is a battery power supply device. An electronic device characterized by comprising means for identifying whether or not the power supply device is a battery power supply device based on an instruction.