JPH0546139U - Cordless communication device - Google Patents

Abstract

(57) [Abstract] [Purpose] When charging a mobile device from a charger of the fixed device, the fixed device is prevented from being overcharged by erroneously recognizing the remaining capacity of the battery of the mobile device. [Configuration] The mobile device is a means for detecting the start and end of charging,
The fixed device includes means for modulating and transmitting the information, means for demodulating the received information, means for detecting the state of the charger of the fixed machine, power consumption of the battery of the mobile device from the received information and the state of the charger The structure is provided with means for calculating the quantity.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a cordless communication device including a mobile device using a battery and a stationary device that transmits and receives information to and from the mobile device, and more specifically, a charger for the stationary device of the cordless communication device. Control of the charging time of the mobile device by.

[0002]

[Prior Art]

 The current when a mobile device of a cordless communication device is used is a typical example, and is about 130 mA in a call state and about 50 to 70 mA in a standby state. The power consumption is calculated by summing the products of the respective currents and the respective times. Based on the above, the power consumption of the battery of the mobile device is calculated from the time when the mobile device of the cordless communication device was in the standby state and the time when it was in the call state, and the power consumption was divided by the charging current to perform quick charging The time was calculated and this was controlled.

[0003]

[Problems to be solved by the device]

 In the above conventional device, when the battery of the mobile device of the cordless communication device is charged using a charger other than the charger of the fixed device of the cordless communication device, the fixed device cannot detect that the mobile device is in a charging state. The fixed machine cannot recognize that the charge status of the battery has changed. Therefore, when the battery of the mobile device is charged from the charger of the fixed device next, there is a problem that the amount of charge by another charger is ignored and rapid charging is performed, resulting in overcharging.

[0004]

[Means for Solving the Problems]

 This invention is, in the cordless communication device as described above, means for detecting the start and end of charging in the mobile device of the cordless communication device, and means for transmitting a modulation signal to the wireless circuit section of the mobile device based on the information of the detection device. Based on a part or all of the information, the fixed device includes means for demodulating the information of the detection means from the wireless circuit of the fixed device, means for detecting whether or not the charger of the fixed device is in an operating state. A cordless communication device comprising means for calculating the amount of battery power consumption of a mobile device.

[0005]

【Example】

 FIG. 1 shows a functional block configuration of a cordless telephone which is one of the embodiments using the present invention. The mobile device (1) includes a wireless circuit unit (2), a modulation / demodulation circuit unit (3), a communication circuit unit (4) having a handset, a battery (5), and a CPU that controls and controls each of the above units. It includes a control unit (6) including. The stationary device (7) includes a communication line unit (8), a wireless circuit unit (9), a modulation / demodulation circuit unit (10), and a charger (11) for charging the battery (5) of the mobile device (1). And a charging control unit (12) for controlling the charger (11) and a control unit (13) including a CPU for controlling and controlling the above units. (14) and (15) show respective antennas.

Next, assuming that charging of a charger other than the charger of the stationary machine is trickle charging, the function of the means will be described with reference to the flowchart of FIG. That is, when the user connects or disconnects the mobile device (1) to or from the charger, the control unit (6) of the mobile device (1) detects the start or end of charging from the energized or de-energized state of the battery (5). (Step S-1). The modulation / demodulation circuit unit (3) modulates the detection information, and the wireless circuit unit (2) transmits the modulation information to the fixed device (7) (step S-2).

When the wireless circuit section (9) of the stationary machine (7) receives the modulation information (step S-3), the modulation / demodulation circuit section (10) performs demodulation (step S-4). The charging control unit (12) detects whether the charger (11) is energized or de-energized and sends the information to the control unit (13) (step S-5). When the control unit (13) receives the information that the charger (11) is in the energized state, the control unit (13) determines the quick charge time from the discharge time of the battery (5) calculated up to that time until the battery (5) is fully charged. The information is obtained and sent to the charge control unit (12), and the charge control unit (12) performs rapid charge according to the information from the control unit (13) and switches to trickle charge when the quick charge is completed (step S-6). ).

When the control unit (13) receives the information that the charger (11) is in the non-energized state from the charging control unit (12), whether the charging is started or ended based on the information received from the mobile device (1). Is determined (step S-7). When the control unit (13) determines that the battery (5) has been charged, it adds the discharge time of the battery (5) (step S-8). When the control unit (13) determines to start charging the battery (5), the addition of the discharging time being added is stopped and the discharging time until then is maintained (step S-9).

The discharge state of the mobile device (1) of the cordless telephone includes a call state and a standby state, and the used current is different. To match the discharge time with the discharge amount, the discharge time is corrected by multiplying the call time by the current ratio used.

FIG. 3 shows a comparison of the remaining capacities of the batteries of the cordless telephone using the present invention and the conventional cordless telephone. Lines L1-L2-L3-L5-L6-L8 represent the remaining capacity of the battery of the mobile device using the present invention and the remaining capacity of the battery recognized by the stationary device. Line L1-L2-L3-L5-L9 shows the remaining capacity of the battery of the conventional mobile device, and line L1-L4-L7-L8 shows the remaining capacity of the battery recognized by the conventional stationary device.

At time M1, the remaining capacities of the present invention and the conventional battery are the same as shown by the line L1-L2. At time M2 and time M3, it cannot be recognized by the control unit of the conventional stationary device that the battery is being charged, and the remaining capacity of the battery shown by lines L2-L4 is shown. At this time, the actual remaining capacity of the battery and the remaining capacity of the battery recognized by the control unit in the present invention are shown by lines L2-L3-L5.

At time M4, in the conventional cordless telephone, the remaining capacity of the battery and the remaining capacity of the battery recognized by the control unit of the fixed machine do not match, so that the battery continues to be charged even if it is fully charged and is overcharged. Will wake you up. In the embodiment using the present invention, the remaining capacity of the battery and the remaining capacity of the battery recognized by the control unit of the stationary device match, so that when the battery is fully charged, it becomes a triple charge. Lines L5-L8 indicate the remaining capacity of the conventional battery, and lines L4-L7 indicate the remaining capacity of the battery recognized by the control unit of the conventional stationary machine. Lines L5-L6-L8 represent the remaining capacity of the battery of the embodiment using the present invention and the remaining capacity of the battery recognized by the controller of the stationary machine.

In the present embodiment, the chargers other than the fixed device of the cordless telephone are treated as performing trickle charging. However, if the charging current is not trickle charging, addition or a certain value is added to the discharging time. It is also possible to correct the discharge time by subtracting. Although the above embodiment describes a cordless telephone, it can be used for a facsimile or a modem which is cordless and uses a communication line.

[0014]

[Effect of the device]

 Since the present invention is configured as described above, it has the following effects.

After detecting the start or end of charging of the battery of the mobile unit, the control unit of the fixed unit transmits the fixed amount to the fixed unit and detects the power consumption of the battery according to the received information. The control unit will not erroneously recognize the remaining capacity of the battery, and the battery will not be overcharged.

[Brief description of drawings]

FIG. 1 is a block diagram of an embodiment according to the present invention.

FIG. 2 is a flowchart showing a flow of functions of an embodiment according to the present invention.

FIG. 3 is a comparison diagram of a battery remaining capacity of a mobile device between an embodiment according to the present invention and a conventional cordless telephone.

[Explanation of symbols]

 (1) Mobile device (2) Radio circuit part of mobile device (3) Modulation / demodulation circuit part of mobile device (5) Battery (6) Control part of mobile device (7) Stationary device (8) Communication line (9) Stationary device (10) Modulator / demodulator circuit of fixed machine (11) Charger of fixed machine (12) Charge controller (13) Controller of fixed machine

Claims (1)

[Scope of utility model registration request] 1. In cordless communication, a mobile device using a battery as a power source, and wireless communication for transmitting and receiving information to and from the mobile device and a fixed device connected to a communication line are used for mobile communication. The machine is equipped with means for detecting the start and end of charging, and means for sending a modulation signal to the wireless circuit section of the mobile device based on the information of the detection means, while the fixed machine is equipped with a wireless circuit section of the fixed machine. Means for demodulating the information of the detection means, means for detecting whether or not the charger of the stationary machine is in an operating state, and means for calculating the power consumption of the battery of the mobile device based on part or all of the information. A cordless communication device characterized by being provided.