JP3311545B2 - Battery voltage display - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a battery voltage display device for electronic equipment using a dry battery or a rechargeable battery as a power source.

[0002]

2. Description of the Related Art In recent years, a battery voltage display device such as an electronic device has been designed to notify a user of a consumed state of a used battery.
2. Description of the Related Art A method of detecting a voltage value of a battery, displaying information corresponding to the voltage value by using a display unit such as an LCD or an LED, and notifying a user of a battery consumption state is generally performed.

An example of the above-described conventional battery voltage display device will be described below with reference to the drawings.

FIG. 3 is a block diagram of a conventional battery voltage display device of a portable electronic device using a dry battery or a rechargeable battery as a power source. A battery 1 supplies a voltage to each circuit of the device via a power switch 2. The power supply unit 3 to be supplied, the reset unit 4 that outputs a reset signal when the input voltage is lower than the specific voltage V _1, and the detection unit 5 that detects the voltage of the battery 1 are connected to each other. Output a signal to stop the operation of the device by the reset signal,
The control unit 7 is connected to a control unit 7 that controls a voltage display unit 6 that displays the voltage of the battery 1 based on a detection signal of the detection unit 5.

[0005] The operation of the conventional power supply voltage display device having the above configuration is such that when the power switch 2 is "ON", the voltage is supplied from the battery 1 and the voltage is stabilized in the power supply unit 3 so that each of the devices can be operated. The device is supplied to the circuit, and the device starts operating in a predetermined mode set by the user. In that case, when the voltage supplied from the battery 1 not less than a specific voltages V ₁ is not output a reset signal from the reset unit 4, the control unit 7 as it allowed to continue operation of the device,
The detection unit 5 checks the supplied voltage value, and the control unit 7 inputs the output of the detection unit 5 and performs a display corresponding to the voltage value on the voltage display unit 6 to determine the consumption state of the battery 1. Notify user.

[0006] Next, even if the power switch 2 is "filled", the battery 1 is consumption during operation is used the battery 1 is a long time, when a voltage that is smaller than a certain voltage V _1, the battery 1 Power switch 2 when removed for replacement
Is "OFF", a reset signal is output from the reset unit 4, and the control unit 7 receives this output and stops the operation of the device.

[0007]

However, the conventional battery voltage display device as described above provides a display corresponding to the voltage value of the battery 1 detected by the detection unit 5 on the voltage display unit 6 as it is. Since the state of consumption of the battery 1 is notified and the voltage of the battery 1 changes according to the amount of current consumption flowing through the device, the display also changes. When using a new battery, the voltage value of the battery drops and the display also drops as the battery is used, so the user can correctly recognize the state of battery exhaustion and there is no problem, but for a certain amount of time When the used battery is used continuously, when the power switch 2 of the device is turned off, the current stops flowing, and the battery voltage returns to a certain value as time passes. When the power switch 2 is "turned on" during the next use, the power switch 2 shows a certain high voltage value, the reset unit 4 does not output the reset signal, and the voltage display unit 6 Indicates a high voltage value, and the user looks at the voltage display corresponding to this high voltage value on the voltage display section 6 and says, "The battery voltage value is not high and has not been exhausted, and this battery can still be used sufficiently." Judgment as it is And thus it continues to be used in the battery. Since the battery has been used for a certain period of time, while the device is operating in a certain mode, a large current that does not flow when the power switch 2 is "turned on" flows and the voltage of the battery rapidly increases during use. Value (the voltage drop is proportional to the amount of time the battery has been used and the amount of current consumed by the device). During operation, the voltage may drop below the operating voltage of the device and suddenly become inoperable. There was a problem that there is. In particular, a device that causes a significant difference between the current consumption value when the power switch 2 is “turned on” and the current consumption value during operation (for example, in a communication device, the current consumption value generally differs greatly << standby / transmission / reception >), This phenomenon occurs remarkably. In recent years, as devices become more complex and multi-functional, differences in current consumption values in each mode are increasing, and users cannot always rely on the battery voltage display. Some users carry these batteries, and this has been a major problem in using portable electronic devices that use dry batteries or rechargeable batteries as power sources.

The present invention has been made in view of the above-mentioned conventional problems, and has as its object to provide a battery voltage display device which does not cause a problem when used in a portable electronic device using a dry battery or a rechargeable battery and which is reliable for a user. It was made for the purpose.

[0009]

In order to solve the above-mentioned problems, a battery voltage display device according to the present invention comprises a power supply unit of a battery.
Displays the power switch for supplying power and the voltage value of the battery.
And a display section for indicating the voltage value of the battery to a certain set V
A reset unit issuing the output becomes ₁ or less, a detector for detecting a voltage value of the battery, necessary for the operation mode of the device
A switching unit supplying one set current value i ₁ a to the power supply unit from the battery, the display of the display unit switches
A control unit for controlling an ON operation of the switching unit.
The unit operates at a certain time t after the power switch is turned on.
By turning on the switching unit by ₁
A certain current required for the operating mode of the
Configured to perform control to, voltage display corresponding to the detected voltage value at the that time the detector manner on the display unit
The control unit supplies power to the power supply unit of the equipment.
Some set time after "containing" of the switch t ₁ Dakesu
Turn on the switching part to turn on
By passing the set current i ₁ , the device actually
The worst thing that happens during the operation of the device before entering the operation mode
State, that is, not flowing when the power switch is "on"
Operation mode causes large current to flow
This is to predict a sudden voltage drop.

A memory unit for storing the voltage value of the battery detected by the detection unit; and a voltage value stored in the memory unit and detected by the detection unit during a power switch "ON". A comparing unit that compares the detected voltage value with the detected voltage value and outputs an output to the control unit when the voltage value detected by the detecting unit is lower than the voltage value stored in the memory unit; Upon receiving the output output in step (a), the operation of the device is stopped and the contents stored in the memory unit are controlled to be erased, and when the output from the comparison result by the comparison unit is received, the output is stored in the memory unit. A control unit that controls the display unit to rewrite the set contents to the low voltage value and to perform display corresponding to the voltage value on the display unit, always detects even when the battery voltage of the operating device is low, and stores it. of New, it is intended to notify the state of always correct battery drain to the user by the updating of the display.

[0011]

According to the present invention, a portable electronic device using a dry battery or a rechargeable battery as a power source can properly provide a user with a proper battery even if the battery has been used for a certain period of time. the consumption state of the battery news by the display of the battery voltage, the user a lower its value, equipment
Before actually entering the operation mode, it is possible to take measures such as replacing the battery with a new one, thereby preventing the device from suddenly becoming inoperable due to battery consumption during operation. In particular, a large effect can be obtained in a device in which a remarkable difference occurs between the current consumption value when the power switch is turned on and the current consumption value during operation.

In addition, it is possible to notify the user instantaneously of the state of exhaustion of the battery of a device that is operating properly.

In view of the above-mentioned conventional problems, the present invention provides a portable electronic device that uses a dry battery or a rechargeable battery as a power source even when a battery that has been used for a certain period of time is continuously used. Before the equipment actually enters the operating mode
In addition, the user can correctly know the battery consumption status,
A battery voltage display device which is reliable for the user and which has no problem in use is provided.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a battery voltage display device according to the present invention will be described below in detail with reference to FIGS.

FIG. 1 is a block diagram of a battery voltage display device according to a first embodiment of the present invention.

FIG. 1 differs from FIG. 3 which shows the conventional example in that a certain time t ₁ after the power switch 2 is "turned on" is controlled by the ON / OFF control of the control unit 7 for a certain time t1. The only difference is that a switching section 8 for flowing the set consumption current i ₁ is provided, and other points are the same as those in FIG.

The operation of the battery voltage display device configured as described above will be described below.

First, when the power switch 2 is "ON", the voltage is supplied from the battery 1, and after the voltage is stabilized in the power supply section 3, the voltage is supplied to each circuit of the device, and the device is operated by the user. Start operation in the set mode and
Flow control unit 7 consumes current i ₁ which is one set ON only the switching unit 8 one set time t ₁ by. The voltage supplied from the battery 1 drops due to the flow of the consumption current i ₁ (the voltage drop sharply occurs when the battery that has been used continuously is used continuously, due to the characteristics of the battery itself). , the control unit 7 does not output a reset signal from the reset unit 4 in case when the voltage is not specific voltages V ₁ below to continue the operation of the device, the detection unit 5 detects the lowered voltage, the detection The control unit 7 that has input the voltage value displays a voltage corresponding to the voltage value on the voltage display unit 6 and notifies the user of the consumption state of the battery 1 as the battery voltage.

[0019] Next, even if the power switch 2 is "filled", the battery 1 is consumption during operation is used the battery 1 is a long time, when a voltage that is smaller than a certain voltage V _1, the battery 1 Power switch 2 when removed for replacement
Is "OFF", a reset signal is output from the reset unit 4, and the control unit 7 receives this output and stops the operation of the device.

As described above, according to the present embodiment, the power switch 2 flows a certain consumption current i ₁ for a certain certain time t ₁ after the start of “turn on”, and the battery voltage at that time is displayed on the display unit. The display (the display time can be set by the control unit so that the user can easily recognize the display time) allows the user to check in advance the battery voltage of a value close to the operation of the device, and The replacement time can be correctly predicted, and unexpected operation failure due to battery exhaustion during use can be prevented. Further, by setting the value of the consumption current i ₁ to be set to the maximum value among the operation modes of this device, it is possible to know in advance the most rapid battery consumption,
Its accuracy can be improved. In addition, since the current consumption of a wireless device or the like generally becomes the maximum value at the time of transmission, an operation of actually performing idle transmission (meaning that only a carrier is transmitted) is performed for a certain first time after the operation of the device is started. The same effect can be obtained, and the special switching unit 8 can be eliminated to reduce the number of circuits.

FIG. 2 is a block diagram of a battery voltage display device according to a second embodiment of the present invention.

FIG. 2 is different from FIG. 1 showing the first embodiment in that a memory unit 9 for storing a battery voltage value detected by a detecting unit 5 and a voltage stored in the memory unit 9 are stored. The value is compared with the voltage value detected by the detection unit 5, and when the voltage value detected by the detection unit 5 is lower than the voltage value stored in the memory unit 9, an output is output to the control unit 7. The point that the comparing unit 10 is provided, the function of causing the control unit 7 to store the battery voltage value detected by the detecting unit 5 in the memory unit 9, and the function of storing the battery voltage value in the memory unit 9 only when there is an output from the comparing unit 10. The voltage value is rewritten to the detected voltage value, the voltage display unit 6 performs a display corresponding to the rewritten voltage value, and the memory unit 9 receives a reset signal from the reset unit 4 and stores the voltage value. Erase the contents and operate the device Is sealed to function as an a point which gave respectively, and a description thereof will be omitted other portions is the same as FIG.

The operation of the above-configured battery voltage display device will be described below.

The device operates in the control unit 7 rather than output when operating in the battery voltage of the device is not V ₁ or less from the reset part 4 to the control unit 7 is continued, the comparing unit 10 detector 5
A comparison is made between the battery voltage value detected every moment and the battery voltage value stored in the memory unit 9. As the consumption of the battery progresses as the use time of the device elapses and the detection unit 5 detects a value lower than the battery voltage value stored in the memory unit 9, an output is output from the comparison unit 10 to the control unit 7. You. In response to this output, the control unit 7 rewrites the content stored in the memory unit 9 to the low value detected by the detection unit 5, and also changes the display on the voltage display unit 6 to a display corresponding to the low value. .

As described above, according to the present embodiment, the lowest battery voltage value among the changing battery voltage values is always displayed on the display unit during the operation of the device, so that the user can be more correctly provided. The battery consumption status can be notified.

[0026]

As described above, the present invention can be applied to a portable electronic device using a dry battery or a rechargeable battery as a power source even when the battery which has been used for a certain period of time is continuously used. when turning oN the switch, identify the time a particular current i ₁ of a value corresponding to the current consumption during operation of the device t ₁ forcibly flowed, detects a battery voltage value close to the state during use of the equipment, possible to display By comparing the battery voltage value stored in the memory section with the detected battery voltage value, the voltage display section is displayed when the detected battery voltage value is lower than the battery voltage value stored in the memory section. By rewriting to the detected low battery voltage value, it is possible to know in advance the power consumption state of the battery that is almost in use when the power is turned on, even when using a battery with a reduced capacity that has been used conventionally. The battery can be prevented from becoming unusable due to exhaustion of the battery during use.Also, the battery consumption status can be correctly notified while the device is operating, and the battery is reliable for the user. A voltage display device is provided.

[Brief description of the drawings]

FIG. 1 is a block diagram of a battery voltage display device according to a first embodiment of the present invention.

FIG. 2 is a block diagram of a battery voltage display device according to a second embodiment of the present invention.

FIG. 3 is a block diagram of a conventional battery voltage display device.

[Explanation of symbols]

 Reference Signs List 1 battery 2 power switch 3 power supply unit 4 reset unit 5 detection unit 6 voltage display unit 7 control unit 8 switching unit 9 memory unit 10 comparison unit

Claims (2)

(57) [Claims] An electric power supply for supplying a power supply of a battery to a power supply section of an apparatus.
A power switch, a display unit for displaying a voltage value of the battery,
A reset unit issuing an output voltage value of the battery falls below a certain set V _1, a detector for detecting a voltage value of the battery, one set current value required for the operation mode of the device a switching unit supplying a i ₁ to the power unit from the battery, oN operation of the display and the switching unit of the display unit
And a control unit for controlling, the control unit, the operation mode of the device by turning ON only the switching unit certain set time t ₁ after the power switch "cored"
Control is performed so that a certain set current required to flow, and a voltage table corresponding to the voltage value detected by the detection unit at that time.
The battery voltage display device is configured to perform the indication on the display unit. 2. A memory unit for storing a detected voltage value of the battery, and a voltage value stored in the memory unit and a voltage value detected by the detection unit during a power switch “ON”. When the voltage value detected by the detection unit is lower than the voltage value stored in the memory unit, the comparison unit outputs an output to the control unit, and the reset unit outputs an output to the control unit. When the output is received, the operation of the device is stopped and the content stored in the memory unit is controlled to be erased. When the output from the result of the comparison by the comparison unit is received, the content stored in the memory unit is received. 2. The battery voltage display device according to claim 1, further comprising: a control unit that rewrites a value to a voltage value detected by the detection unit and controls the display unit to perform display corresponding to the voltage value. .