JPH05136730A - Radio telephone set - Google Patents

Abstract

PURPOSE:To provide the radio telephone set in which it is not required to provide an exclusive display means for displaying a residual capacity of a battery by using the single display means for the display of a reception electric field strength and a battery residual capacity and the reception electric field strength and the battery residual capacity are properly confirmed. CONSTITUTION:The radio telephone set using a battery for a power supply is provided with a battery residual capacity detection means 2 detecting a battery residual capacity, a reception electric field strength detection means 1 detecting the reception electric field strength, a single display means 34 displaying the battery residual capacity and the reception electric field strength, and changeover means 13, 24 switching the battery residual capacity and the reception electric field strength to display it onto the display means.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wireless telephone device using a battery as a power source.

[0002]

2. Description of the Related Art Generally, in a battery-driven wireless telephone device,
When the battery voltage becomes low, an alarm is sent to the user,
It has a function to promote battery replacement. As the notification means for the user, there are cases where a dedicated display such as an LED is used and a case where a general-purpose display is used.

According to the conventional devices so far, when the battery voltage drops, an LED or the like is turned on to give an alarm. However, if an alarm is issued, the call must be stopped immediately for battery replacement and charging. There was a problem such as.

In order to solve such a problem, it is conceivable to provide means for digitally displaying the remaining battery capacity by a fixed operation when necessary, but in addition to the remaining battery capacity,
Since a means for indicating the received electric field strength is also required, providing a large display section for the remaining battery capacity is
There is a problem that it goes against the recent trend toward smaller size and lighter weight.

[0005]

As described above, in the conventional battery-driven wireless telephone device, an LED or the like is turned on to issue an alarm when the battery voltage drops, but immediately when an alarm is issued. There was a problem such as having to cancel the call for battery replacement and charging. Further, if a dedicated display section for digitally displaying the remaining battery capacity is provided, the remaining capacity of the battery can be checked as appropriate, and such a problem can be solved, but means for indicating the received electric field strength is also required. Therefore, there is a problem that it is difficult to provide a large display unit in a recent downsized device, and it hinders downsizing and weight saving of the device.

The present invention has been made to solve the above-mentioned conventional problems. By displaying the received electric field strength and the remaining capacity of the battery with a single display means, a dedicated display for displaying the remaining capacity of the battery is provided. An object of the present invention is to provide a radiotelephone device which can eliminate the necessity of providing display means and can accurately confirm the received electric field strength and the remaining battery charge.

[0007]

In order to achieve the above object, the present invention provides a battery remaining capacity detecting means for detecting the remaining capacity of the battery and a received electric field strength in a wireless telephone device using a battery as a power source. Receiving electric field strength detecting means,
It is characterized by comprising a single display means for displaying the remaining battery capacity and the received electric field strength and a switching means for switching and displaying the remaining battery capacity and the received electric field strength on the display means.

[0008]

According to the present invention, the received electric field strength is normally displayed on the display means, and when a predetermined operation such as a key operation is performed, the received electric field strength display is switched to the remaining battery capacity display. To do.

[0009]

Embodiments 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 circuit for detecting a received electric field strength and a battery remaining capacity and a circuit for displaying them in a radiotelephone device according to an embodiment of the present invention.
The wireless telephone device includes a reception electric field strength detection unit 1, a battery remaining capacity detection unit 2, a display unit 3, and an A / D converter 4.

The received electric field strength detector 1 includes a mixer 10 and
It includes a bandpass filter 11, an IF detection IC 12, a switch 13, and a local oscillator 14. And
An analog output corresponding to the received electric field strength is output to the IF detection IC 12 via the mixer 10 and the bandpass filter 11. This analog output is sent to the A / D converter 4 through the switch 13 that is turned on / off under the control of the CPU 31 of the display unit 3, is converted into predetermined digital data, and the digital data is sent to the CPU 31.

The battery remaining capacity detection unit 2 includes a voltage control resistor 2
1, 22 and a switch 23. ON by control from the CPU 31 via the voltage control resistors 21 and 22
A / D converter 4 passing through switch 23 that is turned on / off
Is converted into predetermined digital data, and the digital data is sent to the CPU 31. In this case, the switch 13 and the switch 23 are turned on at the same time.
The CPU 31 controls so that the switch 23 is turned off when the switch 13 is turned on, and the switch 23 is turned on when the switch 13 is turned off.

The display unit 3 comprises a CPU 31, an LCD control unit 32, an LCD driver 33 and a liquid crystal display 34. The CPU 31 controls the switch 13 of the reception electric field strength detection unit 1 and the switch 23 of the remaining battery capacity detection unit 2, and also controls the liquid crystal display 34.

The received electric field strength and the remaining battery charge digital data sent to the CPU 31 are sent to the LCD controller 32, and the LCD driver 33 is controlled under the control of the LCD controller 32. The LCD driver 33 is the liquid crystal display 3
4 is driven to display a predetermined display.

The liquid crystal display 34 is composed of a numeric display part of several digits and a display part of each function. For example, the electric field strength signal is displayed as shown in FIG. In this example, the electric field intensity signal is displayed in four stages, and the shaded figure is lit, and the larger the number of lit figures, the stronger the electric field strength signal. The remaining battery capacity is also displayed in four steps in the same manner, and the character "Battery" is also displayed at the same time so that the remaining battery capacity is displayed.

In the reception electric field strength detection unit 1 and the battery remaining capacity detection unit 2 configured as described above, the threshold value and the battery remaining capacity display for displaying the reception electric field strength as shown in FIGS. 3 and 4. Thresholds for are set at the manufacturing stage. The display operation of the received electric field strength and the remaining battery charge will be described with reference to the flowchart shown in FIG.

First, the digital data N of the received electric field intensity output from the A / D converter 4 is first compared with the threshold value "2" (step 501). A command is issued to turn on the display of the electric field intensity signal on the liquid crystal display 34 to "0" (step 502). Digital data N is threshold "2"
If larger, digital data N and threshold “4”
(Step 503), and if the digital data is smaller than the threshold value "4", a command is issued to turn on the display of the electric field intensity signal on the liquid crystal display 34 to "1" (step 504).

If the digital data N is larger than the threshold value "4", the digital data N is compared with the threshold value "8" (step 505). If the digital data N is smaller than the threshold value "8", A command is issued to turn on the display of the electric field intensity signal on the liquid crystal display 34 to "2" (step 506).

If the digital data N is larger than the threshold value "8", the digital data N is compared with the threshold value "16" (step 507). If the digital data is smaller than the threshold value "16", the liquid crystal is displayed. A command is issued to turn on the display of the electric field intensity signal on the display 34 to "3" (step 508).

When the digital data N is larger than the threshold value "16", a command is issued to turn on the display of the electric field intensity signal on the liquid crystal display 34 to "4" (step 5).
09). When the key for displaying the remaining capacity of the battery is operated while the electric field strength signal display is lit (step 510),
Display "Battery" (step 511),
The process proceeds to the battery remaining capacity display processing.

Next, the digital data N of the battery remaining capacity is compared with the threshold value "2" (step 512),
If it is smaller than the threshold value "2", a command is issued to turn on the display of the battery remaining capacity on the liquid crystal display 34 to "0" (step 513).

If the digital data N is larger than the threshold value "2", the digital data N is compared with the threshold value "4" (step 514). If the digital data is smaller than the threshold value "4", the liquid crystal is displayed. A command is issued to set the remaining battery capacity display on the display 34 to "1" (step 515).

If the digital data N is larger than the threshold value "4", the digital data N is compared with the threshold value "8" (step 516). A command is issued to turn on the remaining battery capacity display on the display 34 to "2" (step 517).

If the digital data N is larger than the threshold "8", the digital data N is compared with the threshold "16" (step 518). If the digital data is smaller than the threshold "16", the liquid crystal is displayed. A command is issued to turn on the remaining battery capacity display on the display 34 to "3" (step 519).

If the digital data N is larger than the threshold value "16", a command is issued to turn on the remaining battery capacity display on the liquid crystal display 34 to "4" (step 52).
0). When a certain time has elapsed while the remaining battery capacity is being displayed (step 521), the display of "Battery" is erased (step 522), and the process returns to the received electric field strength display process. Further, the following processing is also performed in parallel with the above processing.

As a result of comparison between the remaining battery capacity digital data N and the threshold value "4" (step 524), if the result is smaller than the threshold value "4", it indicates that the battery needs to be charged and replaced. The characters "Discharged" are lit on the liquid crystal display 34 (step 524).

As described above, in this embodiment, the liquid crystal display 34 is switched to display the received electric field strength and the remaining battery capacity. And the remaining battery capacity can be displayed. The present invention is not limited to the above embodiment.

For example, it is possible to return to the received electric field strength display by operating the key again when the remaining battery capacity is displayed. Further, when the electric field strength is displayed and the remaining battery capacity is displayed, “Ful” is displayed on the numeral portion of the liquid crystal display 34.
It is also possible to display l ”,“ High ”,“ Mid ”,“ Empty ”, etc. Furthermore, by switching with a switch, it is possible to display the electric field strength and the remaining battery capacity at the same time.

[0029]

According to the wireless telephone device of the present invention as described above, the display of the received electric field strength and the remaining capacity of the battery is performed by a single display means, so that the remaining capacity of the battery can be displayed exclusively. It is possible to eliminate the necessity of providing the display means and to accurately confirm the received electric field strength and the remaining battery capacity. Further, since the display means is commonly used for displaying the received electric field strength and the remaining capacity of the battery, it is possible to prevent downsizing and weight saving of the device.

[Brief description of drawings]

FIG. 1 is a block diagram showing a circuit configuration for displaying a received electric field strength and a battery remaining capacity of a wireless telephone device according to an embodiment of the present invention.

FIG. 2 is a diagram showing a display example of electric field intensity on a liquid crystal display according to the present invention.

FIG. 3 is a diagram for explaining an example of setting a threshold value of received electric field strength.

FIG. 4 is a diagram for explaining an example of setting a threshold value of a battery remaining capacity.

FIG. 5 is a flowchart illustrating a display processing operation of a received electric field strength and a remaining capacity of a battery according to an exemplary embodiment of the present invention.

[Explanation of Codes] 1 ... Receiving electric field strength detection unit 2 ......... Remaining battery capacity detection unit 3 ......... Display unit 4 ......... A / D converter 10 ......... Mixer 11 ......... Band pass filter 12 … IF detection IC 13 ……… Switch 14 ……… Local oscillators 21, 22… Voltage control resistor 23 ……… Switch 31 ……… CPU 32 ……… LCD control unit 33 ……… LCD driver 34… ...... Liquid crystal display

Claims (1)

[Claims] 1. A wireless telephone device using a battery as a power source, a battery remaining capacity detecting means for detecting a remaining capacity of the battery, a receiving electric field strength detecting means for detecting a received electric field strength, the remaining battery capacity and reception. A wireless telephone device comprising: a single display means for displaying electric field strength; and a switching means for switching and displaying the remaining battery capacity and the received electric field strength on the display means.