JPH01288045A - Cordless telephone set - Google Patents

Abstract

PURPOSE:To attain power supply stop to a speech circuit section and speech end with simple structure and simple circuit constitution by adopting the constitution such that a speech circuit section of a slave set is brought into the end of call via a master set if the slave set in busy state is returned to the home position in the master set and the power supply to the speech circuit section is stopped. CONSTITUTION:If a slave set 1 is contained in a containing section 30 of a master set 3 while a speech switch 16 is being depressed representing the speech state, since a light emission element 20 displays the talking state, a photodetector 35 detects its display state. Thus, in the presence of an output from the photodetector 35, an end of call control output circuit 51 sends an end of call control signal to the slave set 1 via an antenna 31. The slave set 1 receives the end of call control signal via the antenna 11 and uses an end of call control circuit 43 to stop the power supply from a battery 44 to the speech circuit section 42. Thus, the state reaches substantially the end of call, the power consumption in the succeeding speech circuit section 42 is prevented and the light emission element 20 goes off.

Description

[Detailed Description of the Invention] [Summary] This invention relates to a cordless telephone, and prevents power from being continuously supplied to the communication circuit when the handset is left in a talking state/in the return position of the base unit. A cordless telephone is wirelessly connected to a handset, and the handset sets a call circuit section in the handset to a call end state based on a light emitting element indicating a call state and a call end control signal from the base device. The base unit has a call end control circuit that cuts off power supply to the call circuit unit, and the base unit is located at a position facing the light emitting element of the slave unit when the slave unit is stored in the storage unit of the base unit. a light detection element provided to receive light from the light emitting element;
and a call-end control signal output circuit that outputs a call-end control signal to a call-end control circuit in the handset based on the light emission detection signal from the photodetection element, and when the handset is in a talking state, the base unit returns to its position. When the handset is returned to the main unit, the communication circuit section of the slave unit is brought into a call-terminating state via the base unit, and the power supply to the communication circuit unit is stopped.

[Industrial Field of Application] The present invention relates to a cordless telephone, and in particular,
The present invention relates to an operation control method for a cordless telephone that reduces the power consumption of a handset by bringing the handset stored in a housing part of a base phone into a call-terminating state while the handset is in a call state.

[Conventional technology]

FIGS. 6(a) and 6(b) show plan views of a handset and a base (fixed) of the cordless telephone. Handset 1a
is wirelessly connected to the base unit 3a via respective antennas 11 and 31. When the power switch 1a of the handset 1a is turned on, as long as the handset 1a is stored in the handset housing 30 of the base unit 3a or is within a certain distance of the base unit 3a and within a range where wireless connection is possible, the When there is a call, the ringer is driven via the base unit 3a. When the user presses the call switch 16 of the handset 1a, power is supplied to the call circuit section in the handset, making it possible to talk to the caller via the base unit 3a.

Since the handset 1a is a portable type, a small battery of the following formula (non-rechargeable type) or secondary type (rechargeable type) is used to drive the ringer and drive the communication circuit section. . The cordless telephone shown in FIGS. 6(a) and 6(b) is an example of a secondary battery type, and when the handset 1a is stored in the housing 30 of the base phone 3a, the ground terminal 32 and power terminal 33 (hereinafter referred to as charging terminals) are connected to the ground terminal 13 and power terminal 14 (hereinafter referred to as charging terminals) of handset 1a, and the battery in handset la is automatically connected. Charging is performed automatically.

In order to reduce the power consumption of the battery, as mentioned above, power is supplied only to the ringer-related circuit section during standby, and power is also supplied to the call circuit section by pressing the call switch 16. In order to indicate that it is in a call state, the handset 1a is equipped with a low power consumption type light emitting element 2 such as an LCD.
0a is provided.

[Problem to be solved by the invention]

When the handset 1a is stored in the storage section 30 of the base unit 3a after the call ends, the user often leaves the call switch 16 in the pressed state where the call state is set. This is because a normal telephone automatically goes on-hook when you put the handset down.
This is based on the illusion that by storing the phone at 0, the phone will automatically go into a non-call state. However, in a cordless telephone, unless the call switch 16 is reset, the call state will continue and unnecessary power will be supplied to the call circuit for a long time.

In the case of a rechargeable type, charging is performed when the handset 1a is stored in the storage section 30, but there is a problem that unnecessary power is consumed. On the other hand, in the case of a non-rechargeable type, there is a problem that the battery life runs out quickly.

In order to prevent unnecessary power consumption,
Signal terminals 15 and 34 are provided on the side and the base unit 3a, respectively, and the base unit 3a side detects that the slave unit 1a is placed in the storage section 30 and starts charging, and the signal terminal 34 detects this charging start detection. The signal is outputted to the signal terminal 15 on the handset side through the handset side, and the call circuit section on the handset side is put into a call termination state, that is, no power is supplied.

However, in the above-mentioned conventional technology, in order to detect the start of charging, a circuit for detecting, for example, a change in charging current must be provided, and furthermore, this circuit is relatively complicated. Furthermore, there is a problem in that signal terminals 15.degree. 34 must be provided on the child ila side and the master device 3a side, respectively.

Therefore, an object of the present invention is to realize a simple structure and a simple circuit for reducing the power consumption of a handset even when the call switch of the handset is on.

[Means to solve the problem]

In order to achieve the above object, in the present invention, FIG.
As shown in a), the handset 1 is provided with a self-luminous type light-emitting element 20 for displaying the call status. Further, as shown in FIG. 1(b), a photodetecting element 35 is provided in the storage section 30 of the main unit 1 at a position facing the light emitting element 20 when the slave unit 1 is stored in the storage section 30.

The signal terminals 15 and 34 shown in FIGS. 6(a) and 6(b) are not provided.

Further, as shown in FIG. 2, a call termination control signal output circuit 51 is provided on the base unit 2 side, and a call termination control circuit 43 is provided on the child@1 side.

Preferably, the light emitting control circuit 41 in the slave unit that drives the light emitting element 20 for displaying the call status is configured to drive the light emitting element 20 in a pattern specific to the slave unit, and outputs a call end control signal in the base unit 2. The circuit 51 is configured to respond only to a signal of a display pattern specific to the corresponding slave unit.

[For production]

When the handset 1 presses the call switch 16 to indicate the call status,
- When the base unit 3 is stored in the storage section 30, the light-emitting element 20 is displayed to indicate the call status, so the light-detecting element 3
5, the display state can be detected. Therefore, when there is an output from the photodetector element 35, the call end control output circuit 51 sends out a call end control signal to the handset 1 via the antenna 31.

Handset 1 receives the call termination control signal via antenna 11,
The call termination control circuit 43 stops the power supply from the battery 44 to the call circuit section 42 .

As a result, the call is substantially ended, power consumption in the call circuit section 42 is prevented from then on, and the light emitting element 20 is turned off.

The present invention is applicable whether the battery 44 is rechargeable or non-rechargeable.

In order to clearly distinguish between sunlight and illumination light, the light emitting element 20 preferably emits light in a fixed pattern rather than constantly emitting light.

In particular, when the base unit and slave unit correspond to 1:1, when another slave unit is placed in the storage compartment, or when external light enters, prevent the call termination control signal from being erroneously issued. The light emission control circuit 41 causes the display element 20 to emit light in a pattern specific to the handset, and the call termination control output circuit 51 outputs a call termination control signal only in response to the specific pattern.

It is desirable that the photodetector element 35 is sensitive only to the emission spectrum of the light emitting element 20.

〔Example〕

A light emitting diode (LED) is used as the light emitting element 20 in FIG. 1(a). A photodiode (PD) is used as the photodetector element 35 in FIG. 1(b).

An example circuit of the operation control circuit of FIG. 2 is shown in FIG. 3. In the same figure, a telephone switch 16, a dial 17, etc. are connected to the handset 1, and an LED 20 is made to emit light.
A handset-side control circuit 61 for controlling calls, a wireless line connection circuit 63, and an antenna 11 are provided. Main unit 3 has P
a photodetection signal processing circuit 71 that processes the signal from D35;
A base unit side control circuit 72, a station line connection circuit 73, a wireless line connection circuit 74, and an antenna 74 are provided.The slave unit side control circuit 61 and the base unit side control circuit 72 can each be realized by a microcomputer. .

The LED 20 and the PD 35 are optically coupled, and the wireless line connection circuits 62 and 74 are antennas ii and 31, respectively.
wirelessly connected via.

The control circuit 61 lights up the LED 20 in response to the ON operation of the call switch 16, but lights it up in a blinking pattern unique to this handset. The light detection signal processing circuit 71 drives the control circuit 72 only when a signal corresponding to this unique blinking pattern of light is input.

The control circuit 72 outputs a call termination control signal to the handset 1 via the line connection circuit 74. The handset 1 inputs the call termination control signal via the line connection circuit 62, and the control circuit 62 turns on the LED 20.
lights up and disconnects the power supply line from the battery to the telephone line section (not shown).

FIG. 4 shows a flowchart of the control operations of the control circuits 72.61 of the base unit 3 and handset 1 when a call request is received from the normal standby state and a call is made.

FIG. 5 shows a flowchart of the call termination operation and the transition to the standby state when the handset 1 is stored in the storage section 30 of the base unit 3.

In the present invention, the battery may be either rechargeable or non-rechargeable.

〔Effect of the invention〕

As described above, according to the present invention, it is possible to perform a call termination operation and a power supply stop operation to the call circuit section with a simple structure and a simple circuit configuration.

[Brief explanation of the drawing]

1(a) and (b) are plan views of a handset and base unit of the present invention, FIG. 2 is an operation control circuit diagram of the cordless telephone of the present invention, and FIG. 3 is a diagram of the cordless telephone of the embodiment of the present invention. Operation control circuit diagram, Figures 4 and 5 are operation flowcharts of the circuit in Figure 3, Figures 6 (a) and (b) are plan views of the conventional slave unit and base unit,
It is. (Explanation of symbols) 1...Slave unit, 2...Base unit, 16...
Call switch, 20... Light emitting element for displaying communication status, 30... Handset storage section, 35... Photodetection element, 4
1... Light emission control circuit, 42... Call circuit section, 43
...Call end control circuit, 44...Battery, 51.
...Call termination control output circuit, 61...Slave unit side control circuit, 62...Slave unit side wireless line connection circuit, 71...Light detection signal processing circuit, 72...Base unit side control circuit, 73... Office line connection circuit, 74... Base unit side wireless line connection circuit.

Claims (1)

[Claims] 1. A cordless telephone in which a base unit (2) and a handset (1) are wirelessly connected, the handset having a light emitting element (20) that indicates the call status;
a call termination control circuit (43) that puts a call circuit section (42) in the slave device into a call termination state based on a call termination control signal from the parent device and cuts off power supply to the call circuit section; The device includes a light detection element (35) provided at a position facing the light emitting element of the slave unit so as to receive light from the light emitting element when the slave unit is stored in the storage section of the base unit; ,
It has a call termination control signal output circuit (51) that outputs a call termination control signal to the call termination control circuit in the slave unit based on the light emission detection signal from the photodetection element, and when the slave unit is in a talking state, the base unit returns. 1. A cordless telephone set, characterized in that, when the telephone set is returned to its position, the telephone call circuit section of the handset unit is put into a call-terminating state via the base unit, and the power supply to the telephone call circuit section is stopped. 2. The handset has a light emitting control circuit (41) that causes the call status display light emitting element to emit light in a pattern unique to the handset, and the call end control signal output circuit of the base unit emits light in a pattern unique to the handset. The cordless telephone according to claim 1, wherein the cordless telephone is configured to output the call termination control signal only in response to a pattern of light emission detection signals.