JPH06224813A - Portable radio telephone system - Google Patents

Abstract

PURPOSE:To provide a portable radio telephone system which can secure the talking of a long time by increasing the output of an electric power supply source and also reducing the power consumption. CONSTITUTION:A portable radio telephone system 1 contains a display part 7, a key operating part 8, a back light part 9 which irradiates the back light to both parts 7 and 8, and a battery 11. Furthermore a solar battery 12 is added together with a detecting part 13 which detects the output of the battery 12, a 1st power switching part 14 which switches the power supplied to the part 7 to the battery 11 or 12, and a 2nd power switching part 15 which turns on and off the connection between the battery 11 and the part 9. Then the switching is carried out between the part 14 and the switch 15 based on the detection result of the part 13. When the battery 12 outputs the effective power of the part 7 in a bright periphery, the part 14 selects the battery 12 for the part 7 by the signal of the part 13. Meanwhile the part 15 cuts the connection between the part 9 and the battery 11. When the periphery is dark, the battery 11 is selected for the part 7 and the part 9 is connected to the battery 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable radiotelephone device using a battery as a main power source, and more particularly, to a portable radiotelephone device which enables long-term communication.

[0002]

2. Description of the Related Art In recent years, wireless telephone devices have become smaller and lighter and are rapidly being used as portable devices, and as a result, it is necessary to secure a long-term call by using a battery as a main power source. It has become.

As shown in FIG. 3, a conventional portable radio telephone apparatus includes an antenna 2, a radio section 3 for modulating and demodulating a radio signal, a microphone 4 for taking in an external voice signal,
A speaker 5 that outputs a voice signal, a voice / data processing unit 6 that processes voice signals and data signals, a display unit 7 that displays the telephone number of the other party, and a key operation unit 8 that inputs keys. A backlight unit 9 that illuminates the display unit 7 and the key operation unit 8 so that they can be recognized even in a dark place, a control unit 10 that controls the entire mobile wireless telephone device, and a battery unit 11 that is a power source of the mobile wireless telephone device. I have it.

In this device, when a key input is made from the key operation unit 8 or an incoming call is made, the backlight unit 9 is activated (on) by a command from the control unit 10, and the key operation is performed. The part 8 and the display part 7 are illuminated from behind. Further, the display unit 7 makes some display in the operating state. All the power consumed by the backlight unit and the display unit is supplied from the battery 11 built in the device.

[0005]

However, in the conventional portable radio telephone device, when the key input is started or the incoming call occurs, the backlight unit 9 is turned on regardless of the light and dark conditions of the surrounding environment. Therefore, even in a place where the key display of the key operation unit 8 and the display of the display unit 7 are sufficiently recognizable, the backlight irradiation is performed and unnecessary power is consumed.
This waste of power shortens the talk time of the portable radio telephone device.

The present invention solves the above-mentioned conventional problems, and provides a portable radiotelephone device capable of talking for a long time by increasing the power supply source and saving the power consumption. Has an aim.

[0007]

In view of the above, according to the present invention, a portable radio having a display means, a key operation means, a backlight means for illuminating the display means or the key operation means with a backlight, and a built-in power source. In a telephone device, a solar cell as a power supply source, detection means for detecting the output of the solar cell, switching selection means for switching the power supply source to the display unit to the solar cell or a built-in power source, and a backlight from the built-in power source. Switch means for switching the power supply to the means on or off is provided, and switching of the switch selection means and the switch means is executed based on the detection result of the detection means for detecting the output of the solar cell.

[0008]

Therefore, when the solar cell is outputting effective electric power as the power source of the display section, that is, when the surroundings are bright, the switching selection means is operated based on the signal from the detection means which has detected the output of the solar cell. The solar cell is selected as the power source of the display unit, and the switch unit cuts off the power supply from the built-in power source to the backlight unit.

Further, when the solar cell does not output the effective power as the power source of the display section, that is, when the surroundings are dark, the switching selection means operates based on the signal from the detection means which has detected the output of the solar cell. The built-in power source is selected as the power source of the display unit, and the switch unit connects the backlight unit and the built-in power source to enable backlight irradiation to the key operation unit and the display unit during operation.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 1, a portable radio telephone device according to an embodiment of the present invention uses a battery unit 11 as a power supply source.
And a solar cell unit 12, and further, a first power source switching unit 14 for switching the power supply source to the display unit 7 to the solar cell unit 12 or the battery unit 11, and the battery unit 11 for the backlight unit 9.
A second power source switching unit 15 for turning on / off the power supply from
The solar cell output detection unit 13 detects an output of the solar cell unit 12 and outputs a power supply switching signal to the first power supply switching unit 14 or the second power supply switching unit 15. Other configurations are the same as those of the conventional device (FIG. 3). The external appearance of this device is shown in FIG.

When this portable radio telephone device is used in a dark place such as at night, the output of the solar cell unit 12 becomes small and effective power cannot be supplied to the display unit 7. The solar cell output detection unit 13 that has detected this state outputs a power supply switching signal, and receives the signal, the first power supply switching unit 14
Switches the connection of the display section 7 to the battery section 11 side (T12 and T1 are connected), and the second power source switching section 15 turns on the connection between the backlight section 9 and the battery section 11 side (T22 And T2 are connected). As a result, the display unit 7 displays a display during operation by the power supplied from the battery unit 11, and
The backlight unit 9 irradiates the key operation unit 8 and the display unit 7 with the backlight by the electric power supplied from the battery unit 11 during operation. Therefore, even in a dark place, the operator can recognize the key display of the key operation unit 8 and the display content of the display unit 7.

In a place where the portable radio telephone device is used in a bright place such as daytime, the solar cell unit 12 outputs sufficient electric power for operating the display unit 7. Further, in such a bright place, the operator can recognize the key display and the display contents without illuminating the key operation unit 8 and the display unit 7 with the backlight.

In such a circumstance, the solar cell output detecting section 13 which has detected the output from the solar cell section 12 generates a power source switching signal to connect the first power source switching section 14 to the solar cell section 12 side ( T11 and T1 are connected), and the connection of the second power source switching unit 15 is switched to the non-battery unit 11 side (T21 and T2 are connected). As a result, the display unit 7 performs display during operation by the electric power supplied from the solar cell unit 12, the power supply to the backlight unit 9 is cut off, and the backlight irradiation during operation is stopped.

As described above, in the portable radiotelephone device of the embodiment, the solar cell is used as the power supply source and also as the brightness detecting means to enhance the power supply capacity and stop the backlight irradiation. It is possible to save the power consumption associated with the above, and as a result, it is possible to prolong the talk time in the portable wireless telephone device.

[0015]

As is apparent from the above description of the embodiments, the portable radio telephone device of the present invention is capable of enhancing the power supply capacity and effectively utilizing the power supply capacity of the built-in battery to improve the talk time. Can be extended.

[Brief description of drawings]

FIG. 1 is a block diagram showing the configuration of an embodiment of a portable wireless telephone device of the present invention,

FIG. 2 is an external view of a portable wireless telephone device according to an embodiment,

FIG. 3 is a block diagram showing a configuration of a conventional portable wireless telephone device.

[Explanation of symbols]

 1 Mobile Radio Telephone Device 2 Antenna Part 3 Radio Part 4 Microphone Part 5 Speaker Part 6 Voice / Data Processing Part 7 Display Part 8 Key Operation Part 9 Backlight Part 10 Control Part 11 Battery Part 12 Solar Cell Part 13 Solar Cell Output Detection Part 14 First power supply switching unit 15 Second power supply switching unit

Claims (1)

[Claims] 1. A portable wireless telephone device comprising a display means, a key operation means, a backlight means for irradiating the display means or the key operation means with a backlight, and a built-in power source, as a power supply source. A solar cell, detection means for detecting the output of the solar cell, switching selection means for switching the power supply source to the display unit to the solar cell or a built-in power source, and power supply from the built-in power source to the backlight means. And a switch means for switching on and off, and switching of the switch selecting means and the switch means is executed based on a detection result of the detecting means.