JP2001007715A - Transmitter and radio communications equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a transmitter for reducing the consumption of the capacity of a battery cell, and for preliminarily escaping the shortening of a time for communication, even at operation of communication in a situation where the temperature is relatively low. SOLUTION: In a portable telephone device 1, when detecting that the temperature of a battery cell 10 is less than a set temperature, a control part 12 reduces the amplification factor of a variable amplifier 16 for making the radiation level of transmission radio waves to be radiated from an antenna 8 smaller than a reference radiation level. Thus, a power level to be supplied from the battery cell 10 to a transmitting part 13 can becomes smaller than the reference power level, and the consumption of the capacity of the battery cell 10 can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transmitting device including a battery cell, and a transmitting radio wave radiating means for radiating a transmitting radio wave based on the electric power supplied from the battery cell, and a radio communication device including the transmitting device. Related to the device.

[0002]

Conventionally, portable telephone devices have been widely used. By the way, a mobile phone device generally includes a main body,
A battery pack that can be attached to and detached from the main body, and when the battery pack is attached to the main body, power is supplied from the battery cells of the battery pack to the main body; Is radiated to enable communication.

[0003] By the way, the battery cell has a property that when the temperature of the battery cell itself decreases, the internal resistance increases, so that the consumption of the capacity is faster than at normal temperature. Therefore, for example, when communication is performed in a relatively low temperature condition such as a ski resort or a room where the room temperature is maintained at a low temperature, the capacity of the battery cell is consumed quickly. There is a problem that the time that can be shortened.

The present invention has been made in view of the above circumstances, and has as its object to suppress the consumption of battery cell capacity even when communication is performed in a relatively low temperature condition. Accordingly, it is an object of the present invention to provide a transmission device and a wireless communication device including the transmission device, which can prevent a shortened communication time beforehand and can improve usability.

[0005]

According to the transmitting apparatus of the present invention, the transmitting radio wave radiating means radiates the transmitting radio wave based on the electric power supplied from the battery cell, and the battery cell temperature detecting means includes the battery cell temperature detecting means. Detect the cell temperature. Then, when the battery cell temperature detecting means detects that the temperature of the battery cell is lower than the predetermined temperature, the control means reduces the emission level of the transmission radio wave from the reference radiation level, thereby transmitting the transmission radio wave from the battery cell. Is reduced below the reference power level.

That is, according to this, when the temperature of the battery cell is lower than the predetermined temperature, the radiation level of the transmission radio wave is reduced from the reference radiation level, so that the battery cell is supplied to the transmission radio wave radiating means. Since the power level is made lower than the reference power level, consumption of the capacity of the battery cell can be suppressed accordingly. With this, even when communicating in a situation where the temperature is relatively low,
It is possible to avoid a short communication time beforehand, and to improve usability.

[0007] According to the transmission device of the second aspect, the control means determines the radiation level of the transmission radio wave radiated by the transmission radio wave radiating means according to the battery cell temperature detected by the battery cell temperature detecting means. That is, according to this, the radiation level of the transmission radio wave emitted by the transmission radio wave radiating means is determined according to the temperature of the battery cell, so that the transmission radio wave radiation from the battery cell is determined according to the temperature of the battery cell. The level of power supplied to the means can be controlled.

According to the third aspect of the present invention, when the battery cell temperature detecting means detects that the temperature of the battery cell is equal to or higher than the predetermined temperature, the control means holds the radiation level of the transmission radio wave at the reference radiation level. As a result, the power level supplied from the battery cell to the transmission radio wave radiating means is maintained at the reference power level. That is, according to this, when the temperature of the battery cell is equal to or higher than the predetermined temperature, the power level supplied from the battery cell to the transmission radio wave radiating means is maintained by maintaining the radiation level of the transmission radio wave at the reference radiation level. Since the power is maintained at the power level, it is possible to prevent the power level supplied from the battery cell to the transmission radio wave radiating means from being unnecessarily reduced. Thus, the transmission radio wave can be radiated while the power level supplied from the battery cell to the transmission radio wave radiating unit is maintained at the reference power level, and stable communication quality can be secured.

According to a fourth aspect of the present invention, the transmission radio wave radiating means includes variable amplifying means for variably amplifying the transmission signal, and the control means increases / decreases the amplification factor of the variable amplifying means. Thereby, the radiation level of the transmission radio wave radiated by the transmission radio wave radiating means is increased / decreased. That is, according to this, the amplification factor of the variable amplification means is increased.
By decreasing, the radiation level of the transmission radio wave emitted by the transmission radio wave radiating means is increased or decreased, so that the power level supplied from the battery cell to the transmission radio wave radiating means according to the amplification factor of the variable amplifying means. Increase / decrease can be controlled.

[0010] According to the wireless communication apparatus of the present invention, when the transmission voice input means inputs the transmission voice, the transmission voice is modulated and transmitted as a transmission radio wave.
That is, according to this, the transmission voice can be transmitted as the transmission radio wave by inputting the transmission voice to the transmission voice input means, and the communication time becomes shorter in a situation where the temperature is relatively low. It is possible to talk before avoiding that, and in a normal temperature situation where the temperature is relatively low, by maintaining the power level supplied from the battery cell to the transmission radio wave radiating means at the reference power level, Calls can be made while ensuring stable communication quality.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to a transmitting section of a portable telephone device will be described below with reference to the drawings. First, FIG. 2 shows the overall configuration of the mobile phone device as an external perspective view. A communication start key, a redial key, a communication end key, numeric keys “0” to “9”, * (asterisk) key, # (sharp) key, F (function)
A keypad 3 on which various keys such as keys are arranged, a display 4 for displaying a telephone number of a communication partner, a microphone 5 for inputting a transmission voice (transmission voice input means in the present invention), and outputting a reception voice A receiver 6 and an LED 7 that blinks when a call is received are provided.

On the upper side of the main body 2, an antenna case 2a is integrally formed so as to protrude upward. An antenna 8 for both transmission and reception is arranged inside the antenna case 2a. (See FIG. 1).

A battery pack 9 is provided on the back side of the main body 2 so as to be detachable from the main body 2, and a battery cell 10 made of, for example, a lithium battery is provided inside the battery pack 9. Further, a temperature sensor 11 (battery cell temperature detecting means in the present invention) for detecting the temperature of the battery cell 10 is provided (see FIG. 1).

FIG. 1 is a functional block diagram showing the electrical configuration of the portable telephone device 1. As shown in FIG. First, in the main body 2, the control unit 12 (control means in the present invention)
Is composed of a microcomputer, and a transmission unit 13, a reception unit 14, an audio input / output unit 15, the keypad 3, and the display 4 are connected to the control unit 12.

When a transmission voice is inputted from outside, the microphone 5 converts the transmission voice inputted from the outside into an electric signal from a voice signal to generate a transmission signal, and outputs the generated transmission signal to a voice input / output unit. 15 is output. When a transmission signal is provided from the microphone 5, the audio input / output unit 15 performs an amplification process, an A / D conversion process, and the like on the provided transmission signal, and outputs the signal to the transmission unit 13 through the control unit 12. ing.

When a transmission signal is provided from the audio input / output unit 15 through the control unit 12, the transmission unit 13 performs modulation processing, radio processing, and the like on the supplied transmission signal, and performs variable processing on the variable amplifier 16 (referred to in the present invention). Variable amplification means)
The signal is output to the antenna 8 through the duplexer 17. Then, the antenna 8 is transmitted from the transmitting unit 13 to the duplexer 1.
When a transmission signal is given through the transmission line 7, the given transmission signal is radiated as a transmission radio wave in a predetermined communication frequency band (for example, 1.5 GHz band).

When the antenna 8 captures a radio wave in a predetermined communication frequency band (for example, 1.5 GHz band) as a received radio wave, and the received radio wave is supplied from the antenna 8 through the duplexer 17, the receiving unit 14 receives the radio wave. A radio signal and a demodulation process are performed on the received radio wave to generate a received signal, and the generated received signal is output to the audio input / output unit 15 through the control unit 12.

When a reception signal is provided from the reception unit 14 through the control unit 12, the audio input / output unit 15 performs a D / A conversion process, an amplification process, and the like on the provided reception signal, and outputs the result to the receiver 6. It has become. And
When receiving a signal from the voice input / output unit 15, the receiver 6 converts the received signal from an electric signal to a voice signal to generate a received voice, and outputs the generated received voice to the outside. It has become.

The keypad 3 outputs a key operation signal for identifying the operated key to the control unit 12 in response to execution of a key operation by the user. When a display signal is given from the control unit 12, display information corresponding to the given display signal is displayed.

Next, in the battery pack 9, the battery cells 10 supply power to the power supply circuit 18 of the main body 2 on condition that the battery pack 9 is mounted on the main body 2. The power supply circuit 18 includes the battery cell 10
When power is supplied from the control unit 12, the supplied power is supplied to the control unit 12, the transmission unit 13, the reception unit 14, the audio input / output unit 15, and the like. The control unit 12, the transmission unit 13, the reception unit 14, the audio input / output unit 15, and the like operate based on the power supplied from the power supply circuit 18.

The temperature sensor 11 outputs a battery cell temperature signal indicating the temperature of the battery cell 11 to the A / D converter 19 of the main body 2. When a battery cell temperature signal is provided, the provided battery cell temperature signal is converted from an analog value to a digital value and output to the control unit 12.

The control unit 12 receives an A / D signal from the temperature sensor 11.
When a battery cell temperature signal is given through the converter 19, an amplification factor setting command is output to the D / A converter 20 of the transmission unit 13 based on the given battery cell temperature signal, and the D / A When an amplification factor setting command is given from the control unit 12, the converter 20 converts the given amplification factor setting command from a digital value to an analog value and outputs the analog value to the variable amplifier 16.

When the variable amplifier 16 receives an amplification factor setting command from the control unit 12 through the D / A converter 20, the variable amplifier 16 sets the amplification factor based on the given amplification factor setting command, and sets the amplification factor. The transmission signal is amplified according to the rate.

Here, the amplification factor in the variable amplifier 16, the radiation level of the transmission radio wave radiated from the antenna 8, and the transmission unit 13 from the battery cell 10 through the power supply circuit 18.
The relationship with the power level supplied to the power supply will be described. In this case, when the amplification factor of the variable amplifier 16 becomes relatively large, the radiation level of the transmission radio wave radiated from the antenna 8 becomes relatively large, and accordingly, the transmission unit 13 is transmitted from the battery cell 10 through the power supply circuit 18. Are also relatively high. On the other hand, when the amplification factor of the variable amplifier 16 becomes relatively small, the radiation level of the transmission radio wave radiated from the antenna 8 becomes relatively small, and accordingly, the power supply circuit 1
The power level supplied to the transmission unit 13 through 8 is also relatively small.

In the above configuration, the transmission radio wave radiating means 21 according to the present invention is constituted by the antenna 8, the transmitting section 13 and the duplexer 17.

Next, the operation of the above configuration will be described with reference to FIG.
This will be described with reference to FIG. When the control unit 12 shifts from standby to communication, the temperature sensor 11
The temperature T of the battery cell 10 is detected by identifying the battery cell temperature signal input through the converter 19 (step S1).

Next, the controller 12 determines that the detected temperature T of the battery cell 10 is equal to the set temperature Tc (predetermined temperature in the present invention).
It is determined whether it is less than (Step S2). Here, if the temperature T of the battery cell 10 is equal to or higher than the set temperature Tc, the control unit 12 determines “NO” in step S2 and holds the gain of the variable amplifier 16 at a preset reference value. , And outputs the amplification factor setting command to the variable amplifier 16 through the D / A converter 20.

Thus, in the transmission section 13, the transmission signal is amplified by the variable amplifier 16 in accordance with the amplification factor of the preset reference value, and the transmission radio wave is transmitted to the antenna 8
At the reference radiation level Pr (step S3).

On the other hand, if the temperature T of the battery cell 10 is lower than the set temperature Tc, the control unit 12 proceeds to step S2.
Is determined to be "YES", and the radiation level P of the transmission radio wave radiated from the antenna 8 is calculated based on the detected temperature T of the battery cell 10 as shown in the following equation (step S4). P = Pr-a / TP: radiation level Pr: reference radiation level a: constant T: temperature of battery cell

Next, the control unit 12 sets the amplification factor of the variable amplifier 16 so as to have the radiation level P calculated as described above, and outputs an amplification factor setting command to the variable amplifier 16 through the D / A converter 20. .

Thus, in the transmission section 13, the transmission signal is amplified by the variable amplifier 16 in accordance with an amplification factor smaller than the amplification factor of the preset reference value, and the transmission radio wave is transmitted from the antenna 8 to the reference radiation level Pr. Is also radiated at a small radiation level P (step S5). In this case, the radiation level P of the transmission radio wave decreases within a range that complies with the communication standard.

In response to the fact that the radiation level P of the transmission radio wave has decreased below the reference radiation level Pr,
The power level supplied from the battery cell 10 to the transmission unit 13 becomes lower than the reference power level. Here, FIG. 4 shows the relationship between the temperature T of the battery cell 10 and the radiation level P of the transmission radio wave.

When the transmission radio wave is transmitted, the power of the battery cell 10 is consumed, and accordingly, when the temperature T of the battery cell 10 rises, the radiation level of the transmission radio wave P
Increases in accordance with the degree of increase in the temperature T of the battery cell 10.

As described above, according to the present embodiment, the battery cell 1
0 is lower than the set temperature Tc, the variable amplifier 1
6, the radiation level P of the transmission radio wave radiated from the antenna 8 is reduced to the reference radiation level Pr.
So that
The power level supplied from the battery cell 10 to the transmission unit 13 can be reduced below the reference power level, and
The consumption of the capacity of the battery cell 10 can be suppressed. As a result, even when the communication is performed in a situation where the temperature is relatively low, it is possible to prevent the communication time from being shortened beforehand, and to improve the usability.

In this case, since the radiation level P of the transmission radio wave is determined according to the temperature T of the battery cell 10, the power is supplied from the battery cell 10 to the transmission unit 13 according to the temperature T of the battery cell 10. Power level can be controlled.

The temperature T of the battery cell 10 is equal to the set temperature T.
If the value is not less than c, the radiation level P of the transmission radio wave radiated from the antenna 8 is retained at the reference radiation level Pr by retaining the amplification factor of the variable amplifier 16 at the reference value. Therefore, the power level supplied from the battery cell 10 to the transmission unit 13 can be held at the reference power level, and the power level supplied from the battery cell 10 to the transmission unit 13 can be prevented from being unnecessarily reduced. it can. Thereby, the transmission unit 13 is transmitted from the battery cell 10.
It is possible to radiate transmission radio waves while maintaining the power level supplied to the power supply at the reference power level, thereby ensuring stable communication quality.

Further, since the radiation level P of the transmission radio wave radiated from the antenna 8 is increased or decreased by increasing or decreasing the amplification factor of the variable amplifier 16, the amplification factor of the variable amplifier 16 depends on the amplification factor. Thus, it is possible to control the increase / decrease of the power level supplied from the battery cell 10 to the transmission unit 13.

Further, the portable telephone device 1 can communicate in a situation where the temperature is relatively low, while avoiding a short communication time beforehand, and in a situation where the temperature is relatively low and the room temperature is not relatively low. From the battery cell 10 to the transmission unit 13
By maintaining the power level supplied to the base station at the reference power level, it is possible to communicate while ensuring stable communication quality.

The present invention is not limited to the embodiment described above, but can be modified or expanded as follows. Wireless communication devices are not limited to mobile phone devices,
Other devices such as a vehicle-mounted telephone device may be used.

The method of increasing / decreasing the radiation level P of the transmission radio wave is not limited to linearly increasing / decreasing according to the temperature T of the battery cell, but increasing stepwise according to the temperature T of the battery cell. -You may make it decrease.

[Brief description of the drawings]

FIG. 1 is a functional block diagram showing an electrical configuration of an embodiment of the present invention.

FIG. 2 is an external perspective view.

FIG. 3 is a flowchart showing control contents.

FIG. 4 is a diagram showing a relationship between a temperature of a battery cell and a radiation level of a transmission radio wave.

[Explanation of symbols]

In the drawings, 1 is a mobile phone device (wireless communication device), 5 is a microphone (transmitting voice input means), 10 is a battery cell, 11 is a temperature sensor (battery cell temperature detecting means), and 12 is a control unit (control means). , 16 are variable amplifiers (variable amplifying means), and 21 is transmission radio wave radiating means.

Claims (5)

[Claims] 1. A transmitting device comprising: a battery cell; and a transmitting radio wave radiating unit that radiates a transmitting radio wave based on electric power supplied from the battery cell, wherein a battery cell temperature detecting unit detects a temperature of the battery cell. When the battery cell temperature detecting unit detects that the temperature of the battery cell is lower than a predetermined temperature, by reducing the radiation level of the transmission radio wave emitted by the transmission radio wave emitting unit from a reference radiation level, Control means for reducing a power level supplied from the battery cell to the transmission radio wave radiating means below a reference power level. 2. The control device according to claim 1, wherein the control unit determines a radiation level of the transmission radio wave emitted by the transmission radio wave emission unit in accordance with the temperature of the battery cell detected by the battery cell temperature detection unit. Item 4. The transmitting device according to Item 1. 3. The control unit, when the battery cell temperature detection unit detects that the temperature of the battery cell is equal to or higher than a predetermined temperature, determines the radiation level of the transmission radio wave emitted by the transmission radio wave emission unit as the reference value. The transmitting device according to claim 1, wherein the power level supplied from the battery cell to the transmission radio wave radiating unit is maintained at the reference power level by maintaining the power level at the radiation level. 4. The transmission radio wave radiating means includes variable amplifying means for variably amplifying a transmission signal, and the control means increases / decreases an amplification factor of the variable amplifying means, thereby controlling the transmission radio wave. The transmission device according to claim 1, wherein the radiation level of a transmission radio wave emitted by the radiation means is increased or decreased. 5. A transmission apparatus according to claim 1, further comprising: transmission voice input means for inputting transmission voice, wherein the transmission voice input means modulates the transmission voice. Thereby transmitting the modulated transmission voice as the transmission radio wave.