JP2000295164A - Radio calling receiver with low voltage alarm function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To extend a time until a voltage of a battery of a radio calling receiver drops up to a hard reset voltage of a memory by reducing a rapid drop of the battery voltage due to repetition of a notice operation by ring tone of sounder and display notifying a drop of the battery voltage of the radio calling receiver. SOLUTION: In the case that a low voltage alarm signal is generated due to a battery voltage dropped below a 1st threshold value V1 (step (3)), every time a notice operation by sounder ring tone and display is repeated, the battery voltage is again detected (step (4)). Then the battery voltage is compared with a 2nd threshold value V2 lower than the 1st threshold value (step (5)), the notice operation is inhibited when the battery voltage reaches the 2nd threshold value V2 (step (8)).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radio paging receiver using a battery as a power source, and more particularly to a radio paging receiver having a function of notifying a low voltage alarm of a used battery.

[0002]

2. Description of the Related Art A conventional radio paging receiver using a battery such as a primary battery or a secondary battery as a power source stops operation of the receiver when the battery voltage drops during operation and approaches a discharge end state. Generally, an alarm for notifying the user that the life of the camera has come to an end is sounded and displayed on a display.

FIG. 1 is a block diagram of a radio paging receiver to which the present invention is applied. In FIG. 1, 1 is a high-frequency receiving section, 2 is a demodulating section, 3 is a decoder section, 4 is a data processing section, 5 is a display such as an LCD, 6 is a sounder or speaker, 7 is a power control section, and 8 is a battery. Yes, primary batteries such as AAA alkaline batteries or button-shaped zinc-air batteries. Reference numeral 11 denotes a control unit, 12 denotes a voltage detector, and 13 denotes a comparator.

[0004] In general, electronic equipment powered by a battery includes:
Before the battery voltage drops and malfunctions or stops operating, a low voltage alarm that flashes a part of the corner of the display to notify the end of discharge and informs the user of battery replacement or charging. A display function is provided.

[0005] In a device used alone by a user, such as a broadcast receiver (radio) or a word processor, malfunction or stoppage of operation is a personal inconvenience. As a result, personal disadvantages may not be enough. Therefore, not only the display but also the sounder is repeatedly sounded at regular intervals to notify the user.

[0006] The detection of the battery voltage in the radio paging receiver is performed every time intermittent reception is performed to reduce power consumption.
It is performed at 0 second intervals. FIG. 3 is a graph showing an example of a change characteristic of the battery voltage. For example, when a 1.5 V battery is used, when the terminal voltage of the battery drops to 1.1 V (point A), V ₁ = 1.1 V The low voltage alarm is sounded by comparing as a threshold value.

FIG. 4 is a flowchart of a conventional alarm operation.
is there. The control unit 11 of the power supply control unit 7 sets an example for each intermittent reception.
For example, the battery voltage is detected by a voltage detector 12 such as an A / D converter.
Detected (step), the detected voltage is thresholded by comparator 13
Value V₁And the threshold V ₁When the following occurs
), Generate a low voltage alarm signal (step
). The generated alarm signal is sent to the decoder 3, data processing
Is converted into a drive signal by the unit 4 and displayed on the display 5
Both sound the sounder 6 (step). display,
The sounding time (notification time) is short, and is a fixed time interval
For example, after stopping for 5 to 10 minutes or 15 minutes (step
Step), return to the step again and repeat the notification operation
You.

[0008]

However, in the above-mentioned conventional alarm notification operation, since the sounding sound and the LCD display are repeated at regular intervals, the residual power is rapidly consumed. There is a disadvantage in that the voltage drops to the hard reset voltage of the memory, and stored contents such as messages are lost.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a radio paging receiver capable of reducing a sudden drop in battery voltage due to repetition of a sounding sound and a notification operation by a display, and extending a time required for a hard reset voltage of a memory. To provide.

[0010]

SUMMARY OF THE INVENTION A radio paging receiver with a low-voltage alarm function according to the present invention provides a battery-powered radio paging receiver to notify the user that the battery voltage has dropped. A voltage detector for detecting a voltage, a comparator for comparing the detected voltage with a predetermined first threshold value, and a low-voltage warning signal when the detected voltage falls below the first threshold value. A low-voltage alarm function-equipped paging receiver comprising: a control unit for generating and repeating a notification operation of sounding a sounder at a constant interval by the low-voltage alarm signal and displaying the sounder on a display unit. A voltage which is lower than the first threshold value and which does not erase the stored contents of the memory in the receiver is defined as a second threshold value. When occurs, the fixed interval Each time the sounding operation of the sounder and the notification operation by the display are repeated, the battery voltage is detected by the voltage detector, and the detected voltage is compared with the second threshold value by the comparator. When the value is equal to or less than the value, the notification operation by sounding and displaying a sounder is prohibited.

[0011]

FIG. 1 is a block diagram of a radio paging receiver to which the present invention is applied. FIG. 2 is a flowchart showing the operation of the present invention. In the figure, 〜 is a step number.

Steps (1) to (4) are the same as those in the prior art. The battery voltage is detected each time intermittent reception is performed, and the detected voltage and a first threshold value V ₁ for determining whether or not to generate an alarm signal are determined.
Comparing the door, it generates an undervoltage warning signal when the detected voltage becomes the first threshold value V ₁ or less (step).

The next step is a step provided by the present invention. As shown at point B in FIG. 3, a second threshold value V ₂ for preventing a hard reset of the memory.
(However, V ₂ <V ₁ ) is set, and after the low voltage alarm signal is generated (step), the battery voltage is detected again (step) and compared with the second threshold value V ₂ (step). . As long as it is greater than the second threshold value V ₂ , a predetermined time (step) is repeated to notify by sound and display (step). However, when the detection voltage reaches the second threshold value V ₂ less, the routine proceeds to step ringing, prohibits the notification operation by the display. By doing this,
The hard reset of the memory can be prevented by reducing the rapid decrease rate of the battery voltage.

The notification operation in this step can be prohibited by, for example, setting a display stand (do) / by (standby) mode, and a low-voltage alarm display can be seen by a push button switch or the like.

[0015]

As described above in detail, by implementing the present invention, the sounder and the LCD are repeatedly operated without noticing the low voltage alarm, the battery voltage is reduced, and the memory contents are lost. Is less likely to occur,
It is possible to reduce annoying users.

[Brief description of the drawings]

FIG. 1 is a block diagram of a receiver to which the present invention is applied.

FIG. 2 is a flowchart illustrating the operation of the present invention.

FIG. 3 is a diagram showing an example of battery voltage characteristics.

FIG. 4 is a flowchart showing a conventional operation.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 High frequency receiving part 2 Demodulation part 3 Decoder part 4 Data processing part 5 LCD 6 Sounder 7 Power control part 8 Battery 11 Control part 12 Voltage detector 13 Comparator

[Procedure amendment]

[Submission date] March 29, 2000 (2003.
9)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claims

[Correction method] Change

[Correction contents]

[Claims]

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0010

[Correction method] Change

[Correction contents]

[0010]

SUMMARY OF THE INVENTION A radio paging receiver with a low-voltage alarm function according to the present invention provides a battery-powered radio paging receiver to notify the user that the battery voltage has dropped. A voltage detector for detecting a voltage, and the detected voltage
Generates a low-voltage alarm signal when the value becomes equal to or less than a predetermined first threshold , shifts to a low-voltage alarm operation, and sets a predetermined interval.
To repeat the sound of the sounder and the display on the display
And a control unit , wherein the control unit sets a voltage which is lower than the first threshold value and which does not erase stored contents of a memory in the receiver as a second threshold value. In advance , when the detected voltage becomes equal to or less than the first threshold value and the operation shifts to the low-voltage warning operation,
Each time the sound and display of the sound are repeated at the above-mentioned fixed interval
The detected voltage is compared with the second threshold value, and when the detected voltage becomes equal to or less than the second threshold value, the low voltage alarm operation is maintained.
Disable sounder sound and display and enter display standby mode
Thus, the rapid decrease rate of the battery voltage is reduced .

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) H04M 1/72 H04M 1/72 DF term (Reference) 2G016 CB12 CC01 CC04 CC16 CC27 CE03 2G035 AA21 AB03 AC01 AC18 AD28 AD41 5G003 EA05 EA06 5K027 AA11 BB17 FF14 FF25 GG03 5K067 AA27 BB22 CC22 EE02 FF19 FF27 FF31 KK05 KK15

Claims (1)

[Claims] 1. A voltage detector for detecting a battery voltage every time an intermittent reception is performed in order to notify that the battery voltage of a radio paging receiver using a battery as a power source has decreased, and a first detected voltage detected by a first battery. A comparator for comparing the detected voltage with the first threshold value, generating a low-voltage alarm signal when the detected voltage is equal to or less than the first threshold value, and sounding and displaying a sounder at regular intervals according to the low-voltage alarm signal. And a control unit for repeatedly performing a notification operation to be displayed on a display unit. The control unit, wherein the control unit erases the storage content of the memory in the receiver below the first threshold value. When the detected voltage falls below the first threshold and the low-voltage alarm signal is generated, the sounder sounds and displays the sounder at the constant interval when the detected voltage falls below the first threshold. Every time is repeated A battery voltage is detected by a voltage detector, and the detected voltage is compared with the second threshold by the comparator. When the detected voltage falls below the second threshold, the sound is sounded and displayed by a sounder. A radio paging receiver with a low voltage alarm function, wherein operation is prohibited.