JP2016213816A - Video intercom device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a television intercom device capable of suppressing power consumption.SOLUTION: In a television intercom system for performing the switching between a first communication mode for performing radio communication between an indoor monitor or a telephone master unit and an entrance slave unit under a predetermined condition, and a second communication mode having lower power consumption smaller than the first communication mode, the communication mode is switched from the first communication mode to the second communication mode when the indoor monitor registers the entrance slave unit, and the communication mode is switched from the second communication system to the first communication system when the telephone master unit registers the entrance slave unit.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a television door phone device.

  Awareness of crime prevention has been increasing year by year, and in recent years there has been an increasing demand for realizing low cost, easy installation, etc. not only in detached houses but also in single-living households such as studio apartments.

  In order to meet such a demand for simple installation at a low cost, wireless communication between the two is no longer required and wiring work is becoming popular. For example, Patent Literature 1 discloses a television door phone device that includes an entrance slave device and a wireless master device for performing wireless communication between the entrance slave device.

JP 2008-252271 A

  However, when the entrance unit or the wireless master unit is driven by a battery, it is desired to reduce power consumption in order to save time and labor for battery replacement or battery charging.

  The objective of this invention is providing the television door phone apparatus which suppresses power consumption.

  A TV door phone apparatus according to an aspect of the present invention is a TV door phone apparatus that includes an entrance cordless handset and an indoor monitor that performs wireless communication with the entrance cordless handset, and the indoor monitor constantly outputs a synchronization signal. , Periodically transmit and perform periodic reception operation, the main unit turns on the main power as necessary to send a request, and periodically turns on the main power to synchronize When a signal is received and the main power is off, the first communication method is set to sleep, and the main power is turned on only when the room monitor is required, and a request is transmitted. Receives with main power turned on, goes to sleep when main power is turned off, and the entrance cordless handset turns on the main power and sends a request as needed. When the main power is turned off A wireless communication means for requesting the entrance slave unit to perform wireless communication according to the first communication method or the second communication method; and An interference level received signal strength detector for detecting the strength of a received signal in a communication slot other than the communication slot used for communication with the slave unit, and the entrance slave unit is requested by the indoor monitor Control means for controlling to perform wireless communication by a communication method, and the indoor monitor detects that the number of usable communication slots exceeds a specified number by the interference level received signal strength detection unit, A configuration is adopted in which the entrance cordless handset is requested to perform wireless communication by the second communication method.

  ADVANTAGE OF THE INVENTION According to this invention, the low power consumption system corresponding to a radio interference environment is realizable.

The figure which shows the television door phone apparatus which concerns on Embodiment 1 of this invention. The block diagram which shows the structural example of the entrance cordless handset which concerns on Embodiment 1 of this invention. The block diagram which shows the structural example of the indoor monitor which concerns on Embodiment 1 of this invention. Block diagram showing a configuration example of a base unit according to Embodiment 1 of the present invention The block diagram which shows the structural example of the smart phone which concerns on Embodiment 1 of this invention. Sequence diagram showing a procedure for switching from the first communication method to the second communication method when the indoor monitor registers the entrance cordless handset The figure which shows the situation of the change of the current consumption in an entrance cordless handset, an indoor monitor, or a main phone The figure which shows an example of the setting screen of an indoor monitor The sequence diagram which shows the procedure which switches from a 2nd communication system to a 1st communication system, when adding a relay antenna between the indoor monitor which concerns on Embodiment 2, and an entrance cordless handset The figure which shows the situation of the current consumption change in the entrance cordless handset and the indoor monitor The sequence diagram which shows the procedure which switches from the 2nd communication system to the 1st communication system when the indoor monitor which concerns on Embodiment 3 is removed from a charging device. The figure which shows the situation of the current consumption change in the entrance cordless handset and the indoor monitor Sequence diagram showing a procedure for switching from the first communication method to the second communication method when the indoor monitor is connected to the charging device Sequence diagram showing a procedure for switching from the second communication method to the first communication method when the communication environment between the entrance cordless handset and the indoor monitor according to Embodiment 4 deteriorates Sequence diagram showing a procedure for switching from the first communication method to the second communication method when the communication environment between the entrance cordless handset and the indoor monitor is recovered

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

(Embodiment 1)
FIG. 1 is a diagram showing a television door phone device 10 according to Embodiment 1 of the present invention. As shown in FIG. 1, the television door phone device 10 includes an entrance cordless handset 100, an indoor monitor 200, a telephone base phone (hereinafter simply referred to as “base phone”) 300, and a smartphone 400. The TV door phone apparatus 10 can switch between a case where the front door device 100 and the indoor monitor 200 are wirelessly connected and a case where the front door device 100 and the parent device 300 are wirelessly connected. Master device 300 can be wirelessly connected to smartphone 400.

<Configuration of entrance cordless handset>
FIG. 2 is a block diagram illustrating a configuration example of the entrance cordless handset 100 according to Embodiment 1 of the present invention.

  The entrance slave device 100 includes a wireless communication unit 101, a control unit 102, an operation unit 103, a power supply unit 104, an imaging unit 105, a voice input / output unit 106, a storage unit 107, and an interrupt detection unit 108.

  Wireless communication unit 101 communicates with indoor monitor 200 or base unit 300 via a wireless line. The communication method by the wireless communication unit 101 includes, for example, DECT (Digital Enhanced Cordless Communications), wireless LAN (Local Area Network), and ZigBee (registered trademark).

  Wireless communication unit 101 transmits the captured image to indoor monitor 200 or parent device 300. Thereby, an indoor resident can visually recognize a visitor existing near the entrance door. In addition, the wireless communication unit 101 transmits voice information including the voice of the visitor collected by the voice input / output unit 106 of the entrance cordless handset 100 to the indoor monitor 200 or the base unit 300. In addition, the wireless communication unit 101 receives voice information including the resident's voice from the indoor monitor 200 or the parent device 300. Thereby, an outdoor visitor and an indoor resident can talk.

  The control unit 102 includes a ROM (Read Only Memory), a RAM (Random Access Memory), a CPU (Central Processing Unit), and the like. For example, various functions of the control unit 102 are realized by the CPU executing programs stored in the ROM.

  The control unit 102 controls the entire entrance cordless handset 100, and executes various controls, calculations, and determinations. The control unit 102 performs a calculation process for controlling each unit of the entrance cordless handset 100.

  The operation unit 103 is, for example, a call button, and when pressed by a visitor, notifies the indoor monitor 200 or the parent device 300 of the presence of the visitor via the wireless communication unit 101.

  The power supply unit 104 supplies power for operating the entrance slave device 100 to each unit. The power supply unit 104 is configured by a battery such as a primary battery or a secondary battery in consideration of installation. However, the power supply unit 104 is not limited to this, and power may be input from an AC power supply or an AC adapter.

  The imaging unit 105 images a predetermined space outdoors. The image (captured image) captured by the imaging unit 105 includes, for example, a moving image and a still image, and the captured image includes a visitor, a passerby, a suspicious person, an object other than a person, and the like.

  The voice input / output unit 106 is a microphone, a speaker, or the like, collects voice information including the voice of the visitor, and transmits the collected voice information to the indoor monitor 200 or the parent device 300 via the wireless communication unit 101. The voice input / output unit 106 outputs voice information including the voice of the resident transmitted from the indoor monitor 200 or the parent device 300.

  The storage unit 107 is configured by a flash memory or the like, and, for example, device information such as an identification number of the entrance slave device 100, setting information, status information of the indoor monitor 200 or the parent device 300, transmission to the indoor monitor 200 or the parent device 300, for example. The previous captured image or the like is stored.

  The interrupt detection unit 108 detects key interrupts such as buttons provided in the entrance slave device 100, interrupts by a timer, and interrupts by various events. Interrupt detection includes hardware and software detection.

  The interrupt detection unit 108 also has a function of controlling power supply to each unit by the power supply unit 104 in order to realize ultra-low power consumption. For example, the interrupt detection unit 108 is positioned between the power supply unit 104 and each unit such as the control unit 102 on the circuit, and only the interrupt detection unit 108 is always operated by the weak power of the power supply unit 104. Then, the interrupt detection unit 108 turns on / off the switching element to supply power to each unit based on detection of a predetermined interrupt.

<Indoor monitor configuration>
FIG. 3 is a block diagram showing a configuration example of the indoor monitor 200 according to Embodiment 1 of the present invention.

  The indoor monitor 200 includes a wireless communication unit 201, a control unit 202, an operation unit 203, a power supply unit 204, an RSSI level detection unit 205, a display unit 206, a voice input / output unit 207, a storage unit 208, a charge detection unit 209, and an interrupt detection unit. 210.

  The wireless communication unit 201 communicates with the entrance slave device 100 via a wireless line. Communication methods by the wireless communication unit 201 include, for example, DECT, wireless LAN, and ZigBee (registered trademark).

  The wireless communication unit 201 receives a captured image from the front door device 100. Thereby, an indoor resident can visually recognize a visitor existing near the entrance door. In addition, the wireless communication unit 201 receives voice information including the voice of the visitor from the entrance terminal 100. In addition, the wireless communication unit 201 transmits voice information including the resident's voice collected by the voice input / output unit 207 of the indoor monitor 200 to the entrance cordless handset 100. Thereby, an outdoor visitor and an indoor resident can talk.

  The control unit 202 includes a ROM, a RAM, a CPU, and the like. For example, the CPU 202 implements various functions of the control unit 202 by executing programs stored in the ROM. The control unit 202 controls the entire indoor monitor 200 and executes various controls, calculations, and determinations. The control unit 202 performs arithmetic processing for controlling each unit of the indoor monitor 200.

  The operation unit 203 includes various buttons. For example, a response button for responding when the presence of a visitor is notified from the entrance terminal 100, a monitor button for acquiring a captured image from the entrance terminal 100, an entrance A button for controlling the child device 100.

  The power supply unit 204 supplies power for operating the indoor monitor 200 to each unit. The power supply unit 204 may be configured by a battery such as a primary battery or a secondary battery in consideration of installation properties when power is input from an AC power supply or an AC adapter.

  The RSSI level detection unit 205 detects the strength of the signal received by the wireless communication unit 201 from the entrance terminal 100, that is, the received signal strength indicator (RSSI) level.

  The display unit 206 includes, for example, an LCD (Liquid Crystal Display) and displays various characters or images. The image includes, for example, a moving image and a still image, and includes a captured image from the entrance unit 100 and an image for operating the indoor monitor 200.

  The voice input / output unit 207 is a microphone, a speaker, or the like, collects voice information including the resident's voice, and transmits the voice information to the entrance cordless handset 100 via the wireless communication unit 201. Further, the voice input / output unit 207 outputs voice information including the voice of the visitor transmitted from the entrance cordless handset 100.

  The storage unit 208 includes a flash memory and the like, and includes various images, sounds, and other management information. The image includes, for example, a moving image and a still image, and includes a captured image from the entrance unit 100 and an image for operating the indoor monitor 200. The voice includes, for example, a voice of a standard message issued from the indoor monitor 200.

  The other management information includes, for example, password information for preventing various setting information of the indoor monitor 200 from being changed without permission.

  The charge detection unit 209 detects whether the indoor monitor 200 is connected to a charging device such as a charging stand and the power supply unit 204 is connected to an external power supply.

  The interrupt detection unit 210 detects key interrupts such as buttons provided in the room monitor 200, interrupts by timers, and interrupts by various events. Interrupt detection includes hardware and software detection.

  The interrupt detection unit 210 also has a function of controlling power supply to each unit by the power supply unit 204 in order to realize ultra-low power consumption. For example, the interrupt detection unit 210 is positioned between the power supply unit 204 and each unit such as the control unit 202 on the circuit, and only the interrupt detection unit 210 is always operated by the weak power of the power supply unit 204. Then, the interrupt detection unit 210 turns on / off the switching element to supply power to each unit based on detection of a predetermined interrupt.

<Configuration of base unit>
FIG. 4 is a block diagram showing a configuration example of base unit 300 according to Embodiment 1 of the present invention.

  The fixed telephone line I / F unit 301 is connected to the fixed telephone network 85. As a result, base unit 300 can communicate with an external fixed telephone connected to fixed telephone network 85.

  The voice input / output control unit 304 is connected to the voice bus 317 and controls the microphone 328 and the speaker 329. The microphone 328 collects voice information including the resident's voice, and transmits the voice information to the front door device 100 via the DECT protocol control unit 308 and the DECT wireless I / F unit 307. The speaker 329 outputs voice information including the voice of the visitor transmitted from the entrance cordless handset 100.

  The operation unit 305 is various buttons or a touch panel, such as a dial button, a function button, an abbreviated button, and a hold button.

  The display unit 306 includes, for example, an LCD (Liquid Crystal Display) and displays various characters or images. The image includes, for example, a moving image and a still image, and includes a captured image from the front door device 100.

  The DECT protocol control unit 308 uses the DECT wireless system to perform wireless connection between the entrance slave device 100 and a telephone slave device (not shown) via the DECT wireless I / F unit 307.

  The control unit 309 controls the entire master device 300 and executes various controls, calculations, and determinations. The control unit 309 includes a call control unit 310 and an audio stream processing unit 312, the call control unit 310 performs call control of a call, and the audio stream processing unit 312 performs processing of audio data and the like.

  The image memory control unit 315 controls the image memory 316 and stores the image data and the like captured by the entrance slave device 100 in the image memory 316.

  The wireless LAN control unit 321 transmits / receives image data and audio data to / from the smartphone 400 or the like via a wireless router connected to the wireless LAN communication I / F unit 322 via a wireless LAN.

  The handset / portable terminal charging unit 326 has an insertion port or a connection plug, and charges the telephone handset or the smartphone 400 connected to the insertion port or the connection plug.

  The USB communication I / F unit 327 is connected to a device or a memory having a USB (Universal Serial Bus) standard interface, and transmits and receives data.

  Master device 300 registers smartphone 400 and a wireless router in advance.

<Configuration of smartphone>
FIG. 5 is a block diagram showing a configuration example of the smartphone 400 according to Embodiment 1 of the present invention.

  The 3G protocol control unit 402 uses a 3G (third generation) wireless communication system to establish a wireless connection with a mobile phone connected to a mobile phone network or another smartphone via the 3G communication I / F unit 401. Do.

  The touch panel 403 is a display input unit in which a display unit and an operation unit are integrated. The touch panel 403 displays information such as images and icons on the screen and accepts a tap operation (or touch operation) on the screen by the user.

  The storage unit 404 includes a flash memory and the like, and includes various images, sounds, and other management information. The image includes, for example, a moving image and a still image, and includes a captured image from the front door device 100 and an image for operating the smartphone 400. The voice includes, for example, a voice of a standard message issued from the smartphone 400.

  The voice input / output control unit 405 is connected to the voice bus 415 and controls the microphone 412 and the speaker 413. The microphone 412 collects sound information including sound and transmits the sound information to the front door device 100 via the wireless LAN control unit 407 and the wireless LAN communication I / F unit 408. The speaker 413 outputs voice information including the voice of the visitor transmitted from the entrance cordless handset 100.

  The control unit 406 includes a ROM, a RAM, a CPU, and the like. For example, various functions of the control unit 406 are realized by the CPU executing programs stored in the ROM. The control unit 406 controls the entire smartphone 400 and executes various controls, calculations, and determinations. Moreover, the control part 406 incorporates the monitoring function control part 414 which can set the function of the entrance cordless handset 100. FIG.

  The wireless LAN control unit 407 transmits / receives image data and audio data to / from the base unit 300 and the like via a wireless router connected to the wireless LAN communication I / F unit 408 via the wireless LAN.

  The USB communication I / F unit 411 is connected to a device or a memory having a USB standard interface, and transmits / receives data.

  The secondary battery 450 is a rechargeable battery and supplies power to each part of the smartphone 400.

<Communication method>
Next, a communication method in the TV door phone device 10 described above will be described.

  In the first communication method, a synchronization signal is constantly transmitted regularly, and the indoor monitor 200 or the master unit 300 that performs a periodic reception operation is transmitted to the main power supply as necessary and a request is transmitted. In addition, the main power is turned on periodically to receive a synchronization signal, and when the main power is turned off, the entrance slave unit 100 that enters the sleep state performs wireless communication. The sleep state of the entrance cordless handset 100 refers to a state in which only a minimum circuit block for turning on the main power supply is biased with an extremely low current consumption when the main power supply is turned off. Examples of the case where the entrance slave device 100 is necessary include a case where a call button of the entrance slave device 100 is pressed. Further, the entrance unit 100 may turn on the main power and transmit a request only when necessary, and may enter a sleep state when the main power is off.

  In the second communication method, the main power supply is turned on only when necessary to transmit a request, and in standby, the main power supply is periodically turned on to receive, and when the main power is turned off, the room enters a sleep state. The monitor 200 and the entrance slave unit 100 that transmits a request with the main power turned on as necessary, periodically receives the main power on during standby, and enters the sleep state when the main power is off. This is a communication method. Further, the entrance unit 100 may turn on the main power and transmit a request only when necessary, and may enter a sleep state when the main power is off. In addition, the indoor monitor 200 transmits a synchronization signal having a longer interval than the reception interval of the entrance unit 100, and the entrance unit 100 periodically turns on the main power to receive the synchronization signal having a longer interval. It may be in a sleep state when the power is turned off. In standby mode, the synchronization signal and all other signals are not transmitted in the No Emission mode (NEM), or the main power is turned on only when necessary, and a synchronization signal with an interval longer than the reception interval of the entrance unit 100 is transmitted. Since the communication method is applied, the second communication method can reduce the power consumption because the transmission operation that uses a large amount of power is less than the first communication method.

<Switching communication method>
FIG. 6 is a sequence diagram showing a procedure for switching from the first communication method to the second communication method when the indoor monitor 200 registers the entrance slave device 100. Here, first, it is assumed that the first communication method is used in a state in which the parent device 300 has registered the entrance child device 100 (registered state).

  In step S01, the master unit 300 cancels the registration of the entrance cordless handset 100, and in step S02, the indoor monitor 200 performs an operation (registration operation) for registering the entrance cordless handset 100 to be in a registered state. At this time, the entrance cordless handset 100 and the indoor monitor 200 use the first communication method.

  In step S03, the indoor monitor 200 transmits a communication method switching request for switching to the second communication method to the front door device 100. In step S04, the front door device 100 confirms switching to the second communication method in the room. Transmit to the monitor 200 and switch to the second communication method.

  As a result, the indoor monitor 200 periodically receives and receives the main power in the case of a system that enters the sleep state, and periodically receives the main power because the main power is always on in the system that does not enter the sleep state. . Further, the entrance unit 100 periodically turns on the main power supply for NEM, and enters the sleep state when the main power supply is off.

  FIG. 7 is a diagram illustrating a change in current consumption in the front door device 100 and the indoor monitor 200 or the parent device 300. In this figure, when the first communication method is set for the master device 300 and the entrance slave device 100, the master device 300 cancels the registration of the entrance slave device 100, and the indoor monitor 200 indicates the entrance slave device 100. Indicates the case of registration operation.

  At time t1, the indoor monitor 200 registers and operates the entrance slave unit 100. At time t2, the indoor monitor 200 transmits a request for switching to the second communication method, and the entrance slave unit 100 is turned on when the main power is turned on. A switching request is received.

  At time t3, the front door device 100 transmits a communication method switching confirmation to the indoor monitor 200 and switches to the second communication method. It is assumed that the indoor monitor 200 enters a sleep state in which the main power is off. As a result, the bias current can be greatly reduced when the main power is off.

  FIG. 8 is a diagram illustrating an example of a setting screen of the indoor monitor 200. The resident presses the menu button and the selection button, selects “Registration / Removal” displayed on the display unit 206 as shown in FIG. 8A, and presses the decision button to decide.

  The resident presses the selection button, selects “Registration” displayed on the display unit 206 as shown in FIG. 8B, and presses the decision button to decide.

  The resident presses the selection button, selects “entrance unit” displayed on the display unit 206 as shown in FIG. 8C, and presses the determination button to determine. Note that the setting shown in FIG. 8 can be similarly performed on the smartphone 400.

  As described above, in the TV door phone apparatus 10 according to the first embodiment, when the indoor monitor 200 registers the entrance cordless handset 100, the indoor monitor that regularly transmits the synchronization signal regularly and performs the periodic reception operation. 200 or parent device 300, and a main power supply is turned on as necessary to send a request, and the main power supply is turned on periodically to receive a synchronization signal. From the first communication method that synchronizes with the machine 100, for example, the main power is turned on only when necessary to send a request, and during standby, the main power is turned on and received periodically. A request is transmitted by turning on the main power supply as necessary with the indoor monitor 200 that is in the sleep state when the power is off, and is periodically received by receiving the main power supply during standby, and is in the sleep state when the main power is off. Entrance cordless handset 10 Doo switches to the second communication method to radio communication. Thereby, the power consumption of the indoor monitor 200 can be suppressed.

  In addition, in this Embodiment, when the indoor monitor 200 registered the entrance cordless handset 100, it demonstrated as what switches from a 1st communication system to a 2nd communication system, However, This invention is not limited to this. For example, when the telephone base unit 300 registers the entrance terminal 100, the second communication method may be switched to the first communication method.

(Embodiment 2)
In the second embodiment of the present invention, a case will be described in which a relay antenna is added between the indoor monitor 200 and the entrance slave device 100 registered.

  Since the structure of the entrance cordless handset 100 and the indoor monitor 200 according to the second embodiment is the same as that of FIGS. 2 and 3 of the first embodiment, these drawings are used as necessary, and overlapping descriptions are provided. Omitted.

  FIG. 9 is a sequence diagram showing a procedure for switching from the second communication method to the first communication method when a relay antenna is added between the indoor monitor 200 and the entrance slave device 100. Here, first, it is assumed that the indoor monitor 200 uses the NEM of the second communication method and periodically receives the NEM.

  In step S11, the indoor monitor 200 detects the start of extension of the relay antenna, and in step S12, the indoor monitor 200 detects completion of the extension of the relay antenna.

  In step S13, the indoor monitor 200 transmits a communication method switching request for switching to the first communication method to the entrance slave device 100 at the timing when the entrance slave device 100 is activated. In step S14, the entrance slave device 100 The switch confirmation to the communication method is transmitted to the indoor monitor 200, and the first communication method is switched.

  FIG. 10 is a diagram illustrating a change in current consumption in the front door device 100 and the indoor monitor 200. When the addition of the relay antenna is completed at time t1, the indoor monitor 200 displays the time t2 to t3 (longer than the reception interval 1.28 seconds of the front door unit 100, for example, about 1.3 seconds. In the reception period of the entrance slave device 100, the communication method switching request to the first communication method is transmitted in all slots. At time t3, the communication method switching request transmitted from the indoor monitor 200 is received by the entrance slave device 100. At time t4, the entrance slave device 100 transmits a communication method switching confirmation to the indoor monitor 200, and the indoor monitor 200 Switches to the first communication method. Thus, when the relay antenna is added, the reason for switching to the first communication method is that the relay antenna is adapted to the first communication method and is not adapted to the second communication method.

  As described above, in the television door phone apparatus of the second embodiment, when a relay antenna is added between the entrance cordless handset 100 and the indoor monitor 200, the second communication method is switched to the first communication method, By using a relay antenna suitable for the first communication method, the communication distance between the entrance cordless handset 100 and the indoor monitor 200 can be increased, or the communication quality can be improved.

(Embodiment 3)
In the third embodiment of the present invention, a case will be described in which the indoor monitor 200 is detached from the charging device or connected to the charging device.

  Since the structure of the entrance cordless handset 100 and the indoor monitor 200 according to the third embodiment is the same as that in FIGS. 2 and 3 of the first embodiment, these drawings are used as necessary, and overlapping explanations are provided. Omitted.

  FIG. 11 is a sequence diagram illustrating a procedure for switching from the first communication method to the second communication method when the indoor monitor 200 is detached from the charging device. Here, first, it is assumed that the indoor monitor 200 is connected to the charging device.

  In step S21, the indoor monitor 200 detects that it has been removed from the charging device, and in step S22, the indoor monitor 200 waits for a predetermined time (for example, 1 minute). This is to exclude such a case because the indoor monitor 200 may be returned to the charging device immediately after being removed from the charging device.

  In step S23, the indoor monitor 200 transmits a communication method switching request for switching to the second communication method to the entrance slave device 100 at the timing when the entrance slave device 100 is activated. In step S24, the entrance slave device 100 The confirmation of switching to the communication method is transmitted to the indoor monitor 200, and the communication method is switched to the second communication method.

  As a result, the indoor monitor 200 periodically receives data during standby, and the front door device 100 periodically turns on the main power supply for the NEM, and enters the sleep state when the main power supply is off.

  FIG. 12 is a diagram illustrating a change in current consumption in the front door device 100 and the indoor monitor 200. When the indoor monitor 200 is removed from the charging device at time t1, the indoor monitor 200 transmits a request for switching to the second communication method at time t2 after waiting for one minute, and the entrance cordless handset 100 receives the switching request.

  At time t3, the front door device 100 transmits a communication method switching confirmation to the indoor monitor 200 and switches to the second communication method.

  As described above, when the indoor monitor 200 is detached from the charging device, the power consumption of the battery of the indoor monitor 200 removed from the charging device is suppressed by switching from the first communication method to the second communication method. The standby time of the monitor 200 can be extended.

  FIG. 13 is a sequence diagram illustrating a procedure for switching from the second communication method to the first communication method when the indoor monitor 200 is connected to the charging device. Here, first, it is assumed that the indoor monitor 200 is detached from the charging device.

  In step S31, the indoor monitor 200 detects that it is connected to the charging device, and in step S32, the indoor monitor 200 waits for a predetermined time (for example, 1 minute). This is to exclude such a case because the indoor monitor 200 may be removed from the charging device immediately after being connected to the charging device.

  In step S33, the indoor monitor 200 transmits a communication method switching request for switching to the first communication method to the entrance slave device 100 at the timing when the entrance slave device 100 is activated. In step S34, the entrance slave device 100 The switch confirmation to the communication method is transmitted to the indoor monitor 200, and the first communication method is switched.

  As a result, the indoor monitor 200 regularly and periodically transmits a synchronization signal every 10 ms and performs a periodic reception operation, and the front door 100 transmits a request with the main power turned on as necessary. In addition, the main power supply is periodically turned on to receive a synchronization signal, and when the main power supply is off, a sleep state is entered.

  As described above, when the indoor monitor 200 is connected to the charging device, switching from the second communication method to the first communication method enables the indoor monitor 200 to constantly transmit synchronous signals at short intervals. Communication quality can be kept good.

  As described above, in the TV door phone device of the third embodiment, when the indoor monitor 200 is detached from the charging device, the power consumption is reduced by switching from the first communication method to the second communication method. The standby time of the monitor 200 can be extended. On the other hand, when the indoor monitor 200 is connected to the charging device, the communication quality can be kept good by switching from the second communication method to the first communication method.

(Embodiment 4)
In the fourth embodiment of the present invention, a case where the communication environment between the front door device 100 and the indoor monitor 200 is deteriorated or recovered will be described.

  Since the structure of the entrance cordless handset 100 and the indoor monitor 200 according to the fourth embodiment is the same as that of FIGS. 2 and 3 of the first embodiment, these drawings are used as necessary, and overlapping descriptions are provided. Omitted.

  FIG. 14 is a sequence diagram showing a procedure for switching from the second communication method to the first communication method when the communication environment between the front door device 100 and the indoor monitor 200 deteriorates.

  In step S41, the indoor monitor 200 detects that the RSSI (received signal strength) has decreased to be less than a predetermined threshold, and in step S42, the indoor monitor 200 waits for a predetermined time (for example, 1 minute). To do. This is to exclude such a case because it may recover immediately after the received signal strength decreases.

  In step S43, the indoor monitor 200 transmits a communication method switching request for switching to the first communication method to the entrance slave device 100 at the timing when the entrance slave device 100 is activated. In step S44, the entrance slave device 100 The switch confirmation to the communication method is transmitted to the indoor monitor 200, and the first communication method is switched.

  As a result, the indoor monitor 200 regularly and periodically transmits a synchronization signal every 10 ms and performs a periodic reception operation, and the front door 100 transmits a request with the main power turned on as necessary. In addition, the main power supply is periodically turned on to receive a synchronization signal, and when the main power supply is off, a sleep state is entered.

  FIG. 15 is a sequence diagram illustrating a procedure for switching from the first communication method to the second communication method when the communication environment between the front door device 100 and the indoor monitor 200 is recovered.

  In step S51, the indoor monitor 200 detects that the received signal strength has recovered and has become a predetermined threshold value or more, and in step S52, the indoor monitor 200 waits for a predetermined time (for example, 1 minute).

  In step S53, the indoor monitor 200 transmits a request for switching to the communication method to switch to the second communication method at the timing when the entrance child device 100 is activated, and in step S54, the entrance child device 100 The confirmation of switching to the second communication method is transmitted to the indoor monitor 200, and switching to the second communication method is performed.

  As a result, the indoor monitor 200 turns on the main power source only when necessary to transmit a request, and at standby, periodically turns on the main power source for NEM and receives it, and sleeps when the main power source is off. The main unit 100 turns on the main power supply as necessary for the NEM and transmits a request when it is in standby mode, and periodically receives and receives the main power supply during standby, and enters the sleep state when the main power is off. When the main power is off, the sleep mode is entered.

  As described above, in the TV door phone apparatus of the fourth embodiment, when the received signal strength of the indoor monitor 200 decreases below a predetermined threshold, the reception is performed by switching from the second communication method to the first communication method. Signal strength can be recovered and communication quality can be kept good. On the other hand, when the received signal strength of the indoor monitor 200 recovers to a predetermined threshold value or more, the first communication method is switched to the second communication method, power consumption is suppressed, and the standby time of the indoor monitor 200 is increased. can do.

  In this embodiment, the communication method is switched when the received signal strength decreases or recovers. However, when the number of usable communication slots is less than the specified number or more than the specified number, the communication is performed. You may make it switch a system. Here, the number of usable communication slots is, for example, the number of slots in which the reception strength at the interference level (that is, the reception strength other than communication) is equal to or less than a certain threshold among the communication slots. Specific examples of switching the communication method when the number of usable communication slots is less than the specified number or more than the specified number include the following examples. When the number of usable communication slots is less than a predetermined setting value (for example, 2), it is determined that there is a lot of interference, and the first communication method is selected, and the number of usable communication slots is the predetermined setting. If the value is equal to or greater than the value, it is determined that there is little interference and the second communication method is switched. Thereby, the low power consumption system corresponding to a radio interference environment can be realized.

  The television door phone apparatus according to the present invention is useful for reducing power consumption.

DESCRIPTION OF SYMBOLS 10 TV door phone apparatus 100 Entrance unit 101, 201 Wireless communication part 102,202,309,406 Control part 103,203,305 Operation part 104,204 Power supply part 105 Imaging part 106,207 Audio | voice input / output part 107,208,303 , 404 Storage unit 108, 210 Interrupt detection unit 200 Indoor monitor 205 RSSI level detection unit 206, 306 Display unit 209 Charge detection unit 301 Fixed telephone line I / F unit 304, 405 Voice input / output control unit 307 DECT wireless I / F unit 308 DECT protocol control unit 310 Call control unit 312 Audio stream processing unit 315 Image memory control unit 316 Image memory 317, 415 Audio bus 321, 407 Wireless LAN control unit 322, 408 Wireless LAN communication I / F unit 326 Child device / portable terminal Charging part 32 7, 411 USB communication I / F unit 328, 412 Microphone 329, 413 Speaker 401 3G communication I / F unit 402 3G protocol control unit 403 Touch panel 414 Monitoring function control unit 450 Secondary battery

Claims (2)

A television door phone device having an entrance unit and an indoor monitor that performs wireless communication between the entrance unit and
The indoor monitor constantly transmits a synchronization signal regularly and performs a periodic reception operation, and the entrance unit transmits a request with the main power turned on as necessary, and periodically The main power is turned on to receive the synchronization signal, and when the main power is turned off, the first communication method that enters the sleep state, and the main power is turned on only when the room monitor is required, and the request is transmitted. In standby mode, the main power supply is turned on periodically for reception, and when the main power supply is turned off, it enters a sleep state.The entrance unit turns on the main power supply as necessary and sends a request. A second communication method for receiving with the main power turned on and entering a sleep state when the main power is turned off,
The indoor monitor is
Wireless communication means for requesting the entrance cordless handset to perform wireless communication by the first communication method or the second communication method;
An interference level received signal strength detection unit for detecting the strength of a received signal in a communication slot other than the communication slot used for communication with the entrance cordless handset,
Have
The entrance cordless handset is
Control means for controlling to perform wireless communication by the communication method requested from the indoor monitor;
When the indoor level monitor detects that the number of usable communication slots is equal to or greater than a predetermined number by the interference level received signal strength detection unit, the indoor monitor informs the entrance unit that wireless communication is performed by the second communication method. Request,
TV door phone device. When the indoor monitor detects that the number of usable communication slots is less than a specified number by the interference level received signal strength detecting unit, the indoor monitor performs wireless communication using the first communication method. Request,
The television door phone apparatus according to claim 1.

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