JP3296642B2 - Cordless telephone equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a cordless telephone device,
In particular, the present invention relates to a cordless telephone device capable of displaying the remaining battery capacity at a value closer to the actual value.

[0002]

2. Description of the Related Art There have been remarkable developments in cordless telephone systems in recent years, and various types of cordless telephones have been announced, and it has become possible to make a call while moving outdoors as a portable telephone. Some are. Also, in offices such as general offices and factories, cordless telephone devices that can be carried from room to room and from building to building have been widely used. In such a cordless telephone device used as a portable device, a battery serving as a power source, particularly a rechargeable battery, is often used for a telephone as a mobile station, but such a battery may cause the battery to run out. I get
In such a case, some users carry a spare battery and some cordless telephones have a function of displaying the remaining battery capacity. A conventional example of a cordless telephone device having such a function of displaying the remaining battery capacity will be described.

FIG. 3 is a block diagram showing a portable unit (mobile station) of a conventional cordless telephone device having a function of displaying a remaining battery capacity. In this figure, reference numeral 1 indicates transmission of radio waves,
An antenna for receiving, a radio circuit for realizing a radio communication operation, a synthesizer for generating a transmission frequency required for a transmission / reception operation, a radio control unit for controlling operations of the radio circuit and the synthesizer, A microphone for converting sound into an electric signal, 6 a receiver for converting a received signal into sound and outputting the same, 7 a call control unit for controlling the operation of the microphone 5 and the receiver 6, and 8 for controlling the operation of the entire cordless telephone device This is the main control unit. Reference numeral 9 denotes an operation unit having a plurality of keys for inputting operation instructions to the cordless telephone, 10 denotes a display on which various information indicating the state of the cordless telephone is displayed, and 11 denotes functions of the cordless telephone. A battery serving as a power supply for supplying power for operating the unit, 12 is a battery voltage detecting unit that detects the voltage of the battery 11, and 13 is a cordless telephone set that is placed in a predetermined place to be in an on-hook state. A charging terminal 14 for making a charging connection occasionally is a charging detecting circuit for detecting a charging operation of the cordless telephone device. The main control unit 8 includes a battery remaining capacity count control unit 15 therein, and counts the amount of charge based on the on-hook time and the use time (off-hook time) of the receiver. A rechargeable battery such as a nickel-cadmium battery is used as the battery 11.

[0004] The slave unit having the above-described configuration is usually mounted on a charging device (not shown) when not in use, whereby the charging terminal 13 is connected to the charging terminal on the charging device side. Power supply. When the slave unit is placed on the charging device in this manner, the charge detection circuit 1
4 detects that the charging terminal 13 is connected to the charging device, and transmits this to the main control unit 8. The main control unit 8 activates the remaining battery count control unit 15 in a direction to increase the remaining battery capacity based on the detection signal from the charge detection circuit 14 (that is, increments the remaining battery capacity). The count of the remaining battery capacity increase is calculated using time as a parameter, and it is calculated how long the connection time of the charging terminal 13 is and how much the remaining capacity increases. Then, the state in which the remaining battery capacity has increased is displayed on the display 10.

[0005] On the other hand, in such a cordless telephone device, when the user wants to make a call, when the user lifts the slave unit from the charging device, the charging detection circuit 14 detects that the charging terminal 13 has separated from the charging device. To the main control unit 8. The main control unit 8 activates the remaining battery count control unit 15 in a direction in which the remaining battery capacity decreases (that is, decrements) based on the detection signal from the charge detection circuit 14. Then, the state in which the remaining battery charge has decreased is displayed on the display 10.

[0006]

However, in the above-mentioned conventional cordless telephone device, the meter of the display 10 is set to 0 when the battery 11 is replaced, or the remaining battery capacity of the battery 11 is indicated. In contrast to setting the meter pointer to the center position, NiCd batteries have different charging / discharging operations depending on temperature, and the performance of individual batteries varies widely. There was a problem that a reliable value could not be obtained only by examining the absolute voltage. In particular, recently, the number of cases in which a mobile station, which is a mobile station, is carried around has increased, and accordingly, a situation has arisen in which the battery runs out and the battery is replaced outdoors. In such a case, although the Ni-Cd battery has various variations as described above, the battery remaining capacity display value (charge pointer) when the battery is replaced is set to 0 or the center value. In some cases, it was significantly different from the remaining battery capacity.

The present invention has been made in view of such a conventional problem, and has as its object to display the remaining battery capacity with a value closer to the actual remaining capacity when the battery is replaced. To provide a cordless telephone device.

[0008]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a cordless telephone device with a means for storing a battery voltage in addition to a means for counting and controlling a charging / discharging current value of a battery; Means for comparing the battery voltage before replacement with the battery voltage after replacement at the time of replacement, and correcting the remaining battery capacity counter value based on the result of the comparison.

[0009]

According to the present invention, in the mobile station, the battery remaining capacity count control unit increases or decreases the battery remaining capacity display counter in the mobile station. The battery voltage storage means always stores the battery voltage. When the battery is replaced, the battery voltage before the battery replacement stored in the battery voltage storage means is compared with the battery voltage after the battery replacement by the battery remaining capacity count correcting means, and as a result, the voltage after the battery replacement is obtained. Is higher, the counter value of the remaining battery capacity is increased, and if the voltage before battery replacement is higher, the counter value of the remaining battery capacity is decreased. As a result, the remaining battery counter value after battery replacement can be made closer to the actual value.

[0010]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of a cordless telephone device according to the present invention. For convenience of explanation, the same parts as those in the conventional example shown in FIG. . This embodiment is different from the conventional example shown in FIG. 3 in that the configuration of the main control unit 20 is improved. In addition to the remaining battery count control unit 15, the main control unit 20 includes a battery voltage storage unit 21, It is provided with a voltage comparison unit 22 for comparing the voltage values of both batteries and a battery remaining capacity count correction unit 23 for correcting the result obtained in the operation of counting the remaining battery capacity. Among these functional units, the battery voltage storage unit 21 stores the voltage value of the battery before battery replacement, and when a new battery is set, the voltage value of this new battery and the previous battery (battery before replacement) ) Can be compared. The voltage comparison unit 22 compares the voltage value stored in the battery voltage storage unit 21 with the voltage value of the newly set battery.
The remaining battery count correction unit 23 corrects the remaining battery counter value obtained from the comparison result of the voltage comparison unit 22.

The operation of the cordless telephone device configured as described above will be described below. In the normal operation, the remaining battery level count control unit 15 in the main control unit 20 increases or decreases the remaining battery level display counter in the slave unit as the mobile station. In other words, when the user goes out with the cordless handset and performs operations such as talking outdoors,
The remaining battery charge count control unit 15 performs a process of reducing the counter value of the remaining battery charge according to the talk time. On the other hand,
When the user returns home or work and hooks the slave unit on the base station, the charging terminal 13 of the slave unit is connected to the charging terminal of the base station to perform charging. This charging operation is detected by the charge detection circuit 14 and transmitted to the main control unit 20. In the main control unit 20, the remaining battery count control unit 15 performs a process of increasing the counter value of the remaining battery charge according to the charging time. . During this operation, the main controller 20 checks the remaining battery capacity and stores the battery voltage. This processing operation is shown in the flowchart of FIG.

That is, as shown in FIG. 2, in a processing step (hereinafter simply referred to as a step) ST1, when the power of the slave unit is turned on, the battery voltage is monitored at regular intervals and the voltage value of the battery 11 is stored in the voltage storage unit 21. Is stored. In addition to such an operation, when the battery is replaced, step ST2 is performed.
In step ST3, if the power is turned off, it is checked whether or not the power of the slave unit has been turned on. If the power has not been turned on, the process repeatedly checks whether the power has been turned on. Then, when the power is turned on, in step ST4, the voltage comparison unit 22 reads out the final voltage at the time of power-on, that is, the voltage value of the battery 11 before the battery replacement, from the voltage storage unit 21. The voltage value of the battery 11 is compared, and the result is sent to the remaining battery count correction unit 23. If the battery voltage after battery replacement is higher than the battery voltage before battery replacement based on the comparison result sent from the voltage comparing unit 22 in step ST5, the remaining battery count correction unit 23 determines the remaining battery capacity in step ST5. A correction process for increasing the value is performed. If the battery voltage after battery replacement is the same as the battery voltage before battery replacement, battery remaining capacity count correction unit 23 does not perform correction on the remaining battery capacity counter value in step ST6. Furthermore, if the battery voltage after battery replacement is lower than the battery voltage before battery replacement, the remaining battery count correction unit 23 performs a correction process of reducing the counter value of the remaining battery capacity in step ST7.

Even when such a comparison process and a process for correcting the remaining battery count based on the result are performed, the environmental conditions such as temperature and humidity are substantially the same for the old and new batteries when the batteries are replaced. The relative voltage difference between the old and new voltages plays an effective role in correcting the charging pointer of the slave unit. The counter value of the remaining battery capacity obtained in this way is more accurate than in the past, whereby the remaining battery counter value after battery replacement can be made closer to the actual value.

[0014]

As described above, according to the present invention, in addition to the means for counting and controlling the remaining battery capacity, the cordless telephone apparatus has means for storing the battery voltage, and means for storing the battery voltage before replacement and the battery voltage after replacement. The battery voltage is compared with the battery voltage, and the battery voltage is compared with the battery voltage before the battery is replaced. The voltage comparison means compares the battery voltage after the battery replacement, and the battery remaining capacity count correction means further increases the counter value of the battery remaining capacity if the voltage after the battery replacement is higher. If the value is higher, a process of reducing the counter value of the remaining battery charge is performed to perform the count correction of the remaining battery charge. As a result, the remaining battery counter value after battery replacement can be made closer to the actual value.

[Brief description of the drawings]

FIG. 1 is a block diagram showing one embodiment of a cordless telephone device according to the present invention.

FIG. 2 is a flowchart illustrating a battery voltage monitoring and correcting operation in the embodiment.

FIG. 3 is a block diagram showing an example of a conventional cordless telephone device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Antenna 2 Radio circuit 3 Synthesizer 4 Radio control unit 7 Call control unit 9 Operation unit 10 Display 11 Battery 12 Battery voltage detection circuit 13 Charging terminal 14 Charge detection circuit 15 Battery remaining capacity count control unit 20 Main control unit 21 Battery voltage storage Unit 22 Battery voltage comparison unit 23 Battery remaining capacity count correction unit

Claims (1)

(57) [Claims] 1. A base station serving as a base for a communication operation, a mobile station capable of performing a communication operation away from the base station, and control means for counting remaining capacity of a rechargeable battery for a power supply incorporated in the mobile station; means for displaying a count value of the battery residual capacity, electrostatic
Means for detecting the voltage of the rechargeable battery at regular intervals from the time when the power is turned on, and means for storing the detected power supply voltage
And the voltage of the rechargeable battery detected above when the power is turned on.
A cordless telephone device comprising: means for comparing the stored final voltage at the time of power-on last time; and means for correcting a remaining battery capacity counter value based on the result of comparison of the battery voltage.