JP6624565B2 - TV intercom equipment - Google Patents

Description

  The present invention relates to a television door phone device.

  Awareness of crime prevention has been improving year by year, and in recent years, there has been an increasing demand for low cost, easy installation of an entrance cordless handset or the like not only in a detached house but also in a single living household such as a one-room apartment.

  In order to meet the demand for such a low-cost and easy installation, there has been a widespread use of wireless communication between the two devices to eliminate the need for wiring work. For example, Patent Literature 1 discloses a television intercom apparatus including a front-end slave unit and a wireless master unit for performing wireless communication with the front-end slave unit.

JP 2008-252271 A

  However, when the entrance cordless handset or the wireless master unit is driven by a battery, it is desired to reduce power consumption in order to save the trouble of replacing the battery or charging the battery.

  An object of the present invention is to provide a TV door phone device that suppresses power consumption.

A video doorphone device according to an aspect of the present invention is a video doorphone device including an entrance device and an indoor monitor that performs wireless communication between the entrance device, and a second door device for performing the wireless communication. A first power-saving communication method, and a second power-saving communication method that further saves power as compared with the first power-saving communication method, wherein the indoor monitor uses the first power-saving communication method. Alternatively, a wireless communication unit for requesting the entrance terminal to perform wireless communication by the second power-saving communication method, and a reception signal of a communication slot other than a communication slot used for communication with the entrance terminal. An interference level reception signal strength detection unit for detecting the strength, the entrance device has control means for controlling to perform wireless communication by a power-saving communication method requested from the indoor monitor, Indoor monitor can be used When the interference level reception signal strength detection unit detects that the number of communication slots has become equal to or greater than the specified number, the interference level reception signal strength detection unit requests the entrance terminal to perform wireless communication using the second power-saving communication method. .

  According to the present invention, a low power consumption system compatible with a wireless interference environment can be realized.

FIG. 1 is a diagram showing a TV door phone apparatus according to Embodiment 1 of the present invention. FIG. 1 is a block diagram showing a configuration example of an entrance terminal according to Embodiment 1 of the present invention. FIG. 1 is a block diagram showing a configuration example of an indoor monitor according to Embodiment 1 of the present invention. FIG. 2 is a block diagram showing a configuration example of a parent device according to Embodiment 1 of the present invention. FIG. 2 is a block diagram showing a configuration example of a smartphone according to Embodiment 1 of the present 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. Diagram showing changes in current consumption between the entrance slave unit and the indoor monitor or master unit Figure showing an example of an indoor monitor setting screen FIG. 7 is a sequence diagram showing a procedure for switching from the second communication method to the first communication method when an additional relay antenna is provided between the indoor monitor and the entrance terminal according to the second embodiment. Diagram showing changes in current consumption at the entrance unit and indoor monitor Sequence diagram showing a procedure for switching from the second communication method to the first communication method when the indoor monitor according to Embodiment 3 is removed from the charging device. Diagram showing changes in current consumption at the entrance unit and 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 terminal and the indoor monitor according to Embodiment 4 is deteriorated. Sequence diagram showing a procedure for switching from the first communication method to the second communication method when the communication environment between the entrance terminal and the indoor monitor is restored.

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

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

  The entrance terminal 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 Telecommunications), wireless LAN (Local Area Network), and ZigBee (registered trademark).

  Wireless communication unit 101 transmits the captured image to indoor monitor 200 or base unit 300. This allows an indoor resident to visually recognize a visitor existing near the entrance door. Further, wireless communication section 101 transmits, to indoor monitor 200 or base unit 300, audio information including the visitor's audio collected by audio input / output section 106 of entrance cordless handset 100. In addition, wireless communication unit 101 receives audio information including a resident's audio from indoor monitor 200 or base unit 300. This allows an outdoor visitor to communicate with an indoor resident.

  The control unit 102 has 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 a program stored in the ROM.

  The control unit 102 controls the whole of the entrance slave unit 100 and executes various controls, calculations, and determinations. The control unit 102 performs an arithmetic 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 ease 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 captures an image of a predetermined space outdoors. The images (captured images) captured by the imaging unit 105 include, for example, moving images and still images, and the captured images include visitors, passers-by, suspicious persons, objects other than humans, and the like.

  The audio input / output unit 106 is a microphone, a speaker, and the like, collects audio information including a visitor's audio, and transmits the audio 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 resident's voice transmitted from the indoor monitor 200 or the base unit 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 cordless handset 100, setting information, status information of the indoor monitor 200 or the master unit 300, and transmission to the indoor monitor 200 or the master unit 300. The previous captured image and the like are stored.

  The interrupt detection unit 108 detects a key interrupt such as a button provided in the entrance cordless handset 100, an interrupt by a timer, and an interrupt 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 to realize ultra-low power consumption. For example, the interrupt detection unit 108 is located 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 constantly operated by the weak power of the power supply unit 104. Then, based on the detection of the predetermined interruption, the interruption detection unit 108 turns on / off the switching element to supply power to each unit.

<Configuration of indoor monitor>
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 interruption detection unit. 210 is provided.

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

  Wireless communication section 201 receives a captured image from entrance cordless handset 100. This allows an indoor resident to visually recognize a visitor existing near the entrance door. In addition, the wireless communication unit 201 receives audio information including an audio of a visitor from the entrance terminal 100. In addition, the wireless communication unit 201 transmits to the entrance cordless handset 100 audio information including the voice of the resident collected by the audio input / output unit 207 of the indoor monitor 200. This allows an outdoor visitor to communicate with an indoor resident.

  The control unit 202 has a ROM, a RAM, a CPU, and the like. For example, various functions of the control unit 202 are realized by the CPU executing a program 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 device 100, Buttons for controlling the slave unit 100 and the like.

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

  The RSSI level detection unit 205 detects the strength of a signal that the wireless communication unit 201 has received from the entrance device 100, that is, the RSSI (Received Signal Strength Indicator) level.

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

  The voice input / output unit 207 is a microphone, a speaker, and the like, collects voice information including a voice of a resident, 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 handset 100.

  The storage unit 208 is configured by a flash memory or the like, and includes various images, sounds, and other management information. The images include, for example, moving images and still images, and include images captured from the entrance cordless handset 100 and images for operating the indoor monitor 200. The voice includes, for example, voice of a fixed 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 charging 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 a key interrupt such as a button provided in the indoor monitor 200, an interrupt by a timer, and an interrupt 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 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 constantly operated by the weak power of the power supply unit 204. Then, based on the detection of the predetermined interrupt, the interrupt detection unit 210 turns on / off the switching element to supply power to each unit.

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

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

  The audio input / output control unit 304 is connected to the audio bus 317 and controls the microphone 328 and the speaker 329. Microphone 328 collects audio information including the voice of the resident, and transmits the collected audio information to entrance cordless handset 100 via DECT protocol control unit 308 and 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, for example, a dial button, a function button, a shortcut button, a hold button, and the like.

  The display unit 306 has, 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 device 100.

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

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

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

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

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

  The USB communication I / F unit 327 connects 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 the 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 or another smartphone connected to the mobile phone network 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, displays information such as images and icons on the screen, and receives a tap operation (or a touch operation) on the screen by the user.

  The storage unit 404 is configured by a flash memory or 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 cordless handset 100 and an image for operating the smartphone 400. The voice includes, for example, voice of a fixed message issued from the smartphone 400.

  The audio input / output control unit 405 is connected to the audio 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 entrance 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 has a ROM, a RAM, a CPU, and the like. For example, various functions of the control unit 406 are realized by the CPU executing a program stored in the ROM. The control unit 406 controls the entire smartphone 400 and executes various controls, calculations, and determinations. The control unit 406 has a built-in monitoring function control unit 414 that can set the functions of the entrance device 100.

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

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

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

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

  The first communication method is to transmit a request by turning on the main power supply if necessary and the indoor monitor 200 or the base unit 300 that regularly transmits a synchronization signal and performs a regular reception operation. In addition, the main power supply is periodically turned on to receive a synchronization signal, and when the main power supply is off, a wireless communication is performed with the entrance slave unit 100 which is in a sleep state. 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 is biased with an extremely low current consumption when the main power is off. As required by the entrance device 100, the call button of the entrance device 100 may be pressed. Further, the entrance cordless handset 100 may turn on the main power supply only when necessary and transmit the request, and may be in a sleep state when the main power supply is off.

  In the second communication method, the main power supply is turned on only when necessary, and a request is transmitted. In a standby state, the main power supply is periodically turned on and received, and when the main power supply is off, the indoor state is in a sleep state. The monitor 200 and the main power supply are turned on as necessary to transmit a request, the main power supply is periodically turned on and received during standby, and the main unit 100 that is in a sleep state when the main power is off is wirelessly connected. This is a communication method. Further, the entrance cordless handset 100 may turn on the main power supply only when necessary and transmit the request, and may be in a sleep state when the main power supply is off. Further, the indoor monitor 200 transmits a synchronization signal at a longer interval than the reception interval of the entrance device 100, and the entrance device 100 periodically turns on the main power to receive the synchronization signal at a longer interval, and When the power is turned off, it may be in a sleep state. During standby, a No Emission mode (NEM) in which the synchronization signal and all other signals are not transmitted, or a main signal is turned on only when necessary, and a synchronization signal having a longer interval than the reception interval of the entrance device 100 is transmitted. Since the communication method is applied, the second communication method requires less transmission operation using large power consumption than the first communication method, so that power consumption can be suppressed.

<Switching the 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 cordless handset 100. Here, first, it is assumed that the first communication method is used in a state where the main unit 300 has registered the entrance slave unit 100 (registered state).

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

  In step S03, the indoor monitor 200 transmits a communication mode switching request to switch to the second communication mode to the entrance device 100, and in step S04, the entrance device 100 confirms switching to the second communication mode in the indoor mode. The message is transmitted to the monitor 200 and is switched to the second communication method.

  Thereby, the indoor monitor 200 receives the power by periodically turning on the main power supply in the case of the system that can be put into the sleep state, and receives the power periodically because the main power supply is always on in the case of the system that cannot be put into the sleep state. . In addition, the entrance cordless handset 100 periodically turns on the main power supply for the NEM, and enters a sleep state when the main power supply is off.

  FIG. 7 is a diagram showing a state of a change in current consumption in the entrance child device 100 and the indoor monitor 200 or the parent device 300. In this figure, when the first communication method is set between the parent device 300 and the entrance device 100, the parent device 300 cancels the registration of the entrance device 100, and the indoor monitor 200 Shows the case of performing a registration operation.

  At time t1, the indoor monitor 200 performs a registration operation of the entrance slave unit 100, and at time t2, the indoor monitor 200 transmits a request for switching to the second communication method, and the entrance slave unit 100 turns on when the main power is on. Receive a switching request.

  At time t3, entrance device 100 transmits a communication mode switching confirmation to indoor monitor 200, and switches to the second communication mode. It is assumed that the indoor monitor 200 is in a sleep state in which the main power is off. Thereby, when the main power supply is turned off, the bias current can be greatly reduced.

  FIG. 8 is a diagram showing an example of a setting screen of the indoor monitor 200. The resident presses the menu button and the selection button, selects “registration / reduction” displayed on the display unit 206 as shown in FIG. 8A, and presses the determination button to determine.

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

  The resident presses the select button, selects “entrance cordless handset” displayed on the display unit 206 as shown in FIG. 8C, and presses the enter button to determine. Note that the settings shown in FIG. 8 can be similarly performed on 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 constantly transmits the synchronization signal regularly and performs the regular receiving operation. The main power supply is turned on and the request is transmitted as required, and the main power supply is periodically turned on to receive a synchronization signal, and the main unit is turned off when the main power supply is off. From the first communication system synchronized with the device 100, for example, the main power is turned on only when necessary and a request is transmitted, and during standby, the main power is turned on and received periodically. The indoor monitor 200 which is in a sleep state when the power is off, and the main power is turned on and a request is transmitted as needed. The standby state is such that the main power is periodically turned on and received in a standby state. 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 the present embodiment, when the indoor monitor 200 registers the entrance cordless handset 100, the first communication method is switched to the second communication method. However, the present invention is not limited to this. For example, when telephone master device 300 registers entrance device 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 in a state where the entrance monitor 100 is registered.

  The configurations of the entrance device 100 and the indoor monitor 200 according to the second embodiment are the same as those shown in FIGS. 2 and 3 of the first embodiment. Omitted.

  FIG. 9 is a sequence diagram showing a procedure for switching from the second communication method to the first communication method when adding a relay antenna between the indoor monitor 200 and the entrance terminal 100. Here, first, it is assumed that the indoor monitor 200 uses the NEM of the second communication method and performs periodic reception.

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

  In step S13, the indoor monitor 200 transmits a communication mode switching request to switch to the first communication mode to the entrance slave unit 100 at a timing when the entrance slave unit 100 starts up, and in step S14, the entrance slave unit 100 Confirmation of switching to the first communication method is transmitted to the indoor monitor 200, and switching to the first communication method is performed.

  FIG. 10 is a diagram illustrating a state of a change in current consumption in the entrance slave unit 100 and the indoor monitor 200. At time t1, when the extension of the relay antenna is completed, the indoor monitor 200 turns on the time from time t2 to t3 (the reception interval of the entrance slave unit 100 is longer than 1.28 seconds, for example, about 1.3 seconds, or about 1.3 seconds. In this case, a request for switching to the first communication method can be transmitted to all slots during the reception period of the entrance cordless handset 100). At time t3, the communication system switching request transmitted from the indoor monitor 200 is received by the entrance terminal 100, and at time t4, the entrance terminal 100 transmits a communication method switching confirmation to the indoor monitor 200, and Switches to the first communication method. As described above, the reason for switching to the first communication method when the relay antenna is added 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 TV door phone device according to the second embodiment, when a relay antenna is added between the entrance cordless handset 100 and the indoor monitor 200, by switching from the second communication method to the first communication method, By using a relay antenna suitable for the first communication method, the communication distance between the entrance terminal 100 and the indoor monitor 200 can be lengthened, and the communication quality can be improved.

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

  Since the configurations of the entrance device 100 and the indoor monitor 200 according to the third embodiment are the same as those in FIGS. 2 and 3 of the first embodiment, these drawings will be referred to as necessary, and duplicate description will be omitted. 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, it is assumed that the indoor monitor 200 is first 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, one minute). This is to exclude such a case since the indoor monitor 200 may be immediately returned to the charging device after being removed from the charging device.

  In step S23, the indoor monitor 200 transmits a communication mode switching request for switching to the second communication mode to the entrance slave unit 100 at the timing when the entrance slave unit 100 starts up, and in step S24, the entrance slave unit 100 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 performs reception periodically during standby, the entrance slave unit 100 periodically turns on the main power for the NEM, and enters the sleep state when the main power is off.

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

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

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

  FIG. 13 is a sequence diagram showing 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 indoor monitor 200 has been removed 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, one minute). This is to exclude such a case since the indoor monitor 200 may be immediately removed from the charging device after being connected to the charging device.

  In step S33, the indoor monitor 200 transmits a communication mode switching request to switch to the first communication mode to the entrance slave unit 100 at the timing when the entrance slave unit 100 starts, and in step S34, the entrance slave unit 100 Confirmation of switching to the first communication method is transmitted to the indoor monitor 200, and switching to the first communication method is performed.

  As a result, the indoor monitor 200 constantly and periodically transmits the synchronization signal every 10 ms, and performs a regular reception operation, and the entrance slave unit 100 turns on the main power supply as necessary and transmits a request. Then, the main power supply is periodically turned on to receive a synchronization signal, and when the main power supply is off, the apparatus enters a sleep state.

  As described above, when the indoor monitor 200 is connected to the charging device, by switching from the second communication method to the first communication method, the indoor monitor 200 can perform stable synchronous communication in which a synchronization signal is always transmitted at short intervals. In addition, good communication quality can be maintained.

  As described above, in the TV door phone device according to Embodiment 3, when the indoor monitor 200 is removed from the charging device, the power consumption is suppressed by switching from the first communication method to the second communication method. The standby time of the monitor 200 can be lengthened. On the other hand, when the indoor monitor 200 is connected to the charging device, the communication mode can be switched from the second communication mode to the first communication mode to maintain good communication quality.

(Embodiment 4)
In Embodiment 4 of the present invention, a case where the communication environment between entrance apparatus 100 and indoor monitor 200 has deteriorated or has been recovered will be described.

  The configurations of the entrance device 100 and the indoor monitor 200 according to the fourth embodiment are the same as those shown in FIGS. 2 and 3 of the first embodiment. 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 entrance cordless handset 100 and the indoor monitor 200 is deteriorated.

  In step S41, the indoor monitor 200 detects that the RSSI (received signal strength) has decreased and becomes less than a predetermined threshold, and in step S42, the indoor monitor 200 waits for a predetermined time (for example, one minute). I do. This is to exclude such a case since the signal may be recovered immediately after the received signal strength is reduced.

  In step S43, the indoor monitor 200 transmits a communication mode switching request to switch to the first communication mode to the entrance terminal 100 at the timing when the entrance terminal 100 starts up, and in step S44, the entrance terminal 100 Confirmation of switching to the first communication method is transmitted to the indoor monitor 200, and switching to the first communication method is performed.

  As a result, the indoor monitor 200 constantly and periodically transmits the synchronization signal every 10 ms, and performs a regular reception operation, and the entrance slave unit 100 turns on the main power supply as necessary and transmits a request. Then, the main power supply is periodically turned on to receive a synchronization signal, and when the main power supply is off, the apparatus enters a sleep state.

  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 entrance cordless handset 100 and the indoor monitor 200 is restored.

  In step S51, the indoor monitor 200 detects that the received signal strength has recovered and becomes equal to or higher than a predetermined threshold. In step S52, the indoor monitor 200 waits for a predetermined time (for example, one minute).

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

  This allows the indoor monitor 200 to turn on the main power supply only when necessary and transmit the request, and to periodically turn on the main power supply for the NEM to receive when waiting, and to sleep when the main power supply is off. The main unit 100 turns on the main power supply as required for the NEM and sends a request. The main unit is periodically turned on to receive the request during standby, and enters the sleep state when the main power is off. When the main power is off, the printer enters a sleep state.

  As described above, in the TV door phone apparatus according to Embodiment 4, when the received signal strength of indoor monitor 200 falls below a predetermined threshold, the reception is switched by switching from the second communication method to the first communication method. The signal strength can be recovered and the communication quality can be kept good. On the other hand, when the received signal strength of the indoor monitor 200 recovers to the predetermined threshold value or more, the first communication mode is switched to the second communication mode, the power consumption is suppressed, and the standby time of the indoor monitor 200 is extended. can do.

  In the present embodiment, the communication method is switched when the received signal strength decreases or recovers. However, when the number of available communication slots becomes less than the prescribed number or becomes more than the prescribed number, the communication method is switched. The method may be switched. Here, the number of usable communication slots is, for example, the number of slots in which the reception strength of the interference level (that is, the reception strength other than the communication) among the communication slots is equal to or less than a certain threshold. A specific example of switching the communication method when the number of usable communication slots is less than the prescribed number or more than the prescribed number is as follows. When the number of usable communication slots is less than a predetermined set value (for example, 2), it is determined that there is much interference, and the first communication mode is switched to the first communication mode. If the value is equal to or more than the value, it is determined that the interference is small, and the mode is switched to the second communication method. As a result, a low power consumption system compatible with a wireless interference environment can be realized.

  The TV door phone device according to the present invention is useful for suppressing power consumption.

Reference Signs List 10 Telephone intercom device 100 Entrance device 101, 201 Wireless communication unit 102, 202, 309, 406 Control unit 103, 203, 305 Operation unit 104, 204 Power supply unit 105 Imaging unit 106, 207 Audio input / output unit 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 Remote unit / mobile terminal Charger 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 (3)

A television door phone device, comprising: an entrance device, and an indoor monitor that performs wireless communication between the entrance device.
A first power-saving communication method for performing the wireless communication, and a second power-saving communication method that further saves power compared to the first power-saving communication method,
The indoor monitor,
Wireless communication means for requesting the entrance terminal to perform wireless communication by the first power-saving communication method or the second power-saving communication method;
An interference level reception signal strength detection unit that detects the strength of a reception signal in a communication slot other than the communication slot used for communication with the entrance terminal,
Has,
The entrance cordless handset,
Having control means for controlling to perform wireless communication by the power saving communication method requested from the indoor monitor,
The indoor monitor, when the interference level received signal strength detection unit detects that the number of available communication slots has become equal to or greater than a specified number, the entrance monitor informs the user that wireless communication is to be performed by the second power-saving communication method. Request to the machine,
TV intercom equipment. The indoor monitor, when detecting that the number of usable communication slots is less than a specified number by the interference level received signal strength detection unit, determines that the wireless communication is performed by the first power-saving communication method. Request to the machine,
The television door phone device according to claim 1.   In the first power-saving communication method, the indoor monitor constantly transmits a synchronization signal at regular intervals, and performs a regular reception operation, and the entrance terminal turns on a main power supply as needed. Transmit a request, and periodically turn on the main power to receive the synchronization signal, when the main power is off, sleep state, the second power-saving communication method, when the indoor monitor is required Only when the main power is turned on, a request is sent, and during standby, the main power is turned on and received periodically, and when the main power is turned off, the sleep state is entered. The television intercom apparatus according to claim 1, wherein a request is transmitted when the main power is turned on, and the main power is periodically turned on and received during a standby state, and is in a sleep state when the main power is off.

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