KR950009702B1 - Video-phone - Google Patents

Abstract

The video phone comprises a first call path setting part connected to a ring singal generating part, a second call path setting part whose one part is connected to a call circuit and whose other part is connected to the first call path setting part, a controlling part connected to the first and second call path setting parts, a speaker of a ring singal generating part connected to one side of the controlling part, a power supply, and a key inputting part in a key input terminal of the controlling part.

Description

Video Phone

1 is a perspective view schematically showing the appearance of a videophone according to the present invention;

2a and b are circuit diagrams showing in detail the entire circuit configuration of the videophone system according to the present invention.

* Explanation of symbols for main parts of the drawings

20: ring signal generator 30: call signal rectifier

40: first call path setting unit 50: call signal smoothing unit

60: entrance hall 70: guard room call

80: second call path setting unit 90: control unit

100: melody generating unit 110: dial signal generating unit

120: call circuit unit 130: key input unit

140: power supply

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a videophone, and more particularly, to a videophone used in combination with a video camera installed at a front door. It is about.

At present, the video phone system with the entrance call function and the entrance call function is widely used. The video phone is an external device, and a video camera for checking the video of the visitor at the entrance is generally used. It is composed of indoor devices that can check with a visitor while talking to the visitor.

According to such a structure, considerable security effect can be acquired at the point which can control opening and closing of a front door after confirming a visitor.

However, the conventional video phone mainly emphasizes the security effect through the visitor's confirmation, and the video phone itself has a communication function and is installed separately from the general subscription phone, so it has a configuration suitable for the current home automation trend. Can't.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a video phone having an automatic incoming call function capable of receiving a door call function and a call of a general subscription phone together with an image transmitted from a video camera.

It is another object of the present invention to provide a video phone having a door call function and a call function with a reception function of a general subscription phone and a guard room.

Still another object of the present invention is to provide a video phone having a door call function, a general subscribed phone call reception function, a call function with a guard room, etc., and a bypass call function to the second receiving side when absent.

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

The present invention is connected to the ring signal generation unit 20 is provided with a hook switch (H20) to the trunk line terminal (TIP) (RING) and the call signal rectifying unit 30 for filtering the call signal through the call path A first call path setting unit 40 for setting is connected, and at one end of the first call path setting unit 40, the call signal smoothing unit 50 and the dial signal generating unit 110 are sequentially mediated. TX120 and the call circuit unit 120 is provided with the receiver (RX120) is connected to the other end through the second call path setting unit 80 through the entrance call unit 60 and the guard room call unit 70 The ring signal generator 20, the first and the second call path setting unit 40, 80 and the guard room call unit 70 are connected to the ring signal generation unit 20 and the control unit 90 for setting their call paths. In addition, the output of the melody generating unit 100 is connected to the speaker SP of the ring signal generating unit 20, the first call path setting unit 40, and the first end of the output of the control unit 90. It is connected to be sent to the two call path setting unit 80, the power supply unit 140 is connected to the power supply terminal of each circuit unit, and the key input unit 130 is connected to the key input terminal of the control unit 90 is have.

1 is a perspective view schematically showing the appearance of a video phone according to the present invention, 10 is a video phone body, a keypad KY10 for call dialing, a handset HD for inputting and outputting a voice signal, and a key for setting a phone call mode. (K10), the key for setting the door call mode (K11), the key for setting the guard room call mode (K12), the key for setting the bypass call mode selected when the call is diverted to the guard room, etc. ), A monitor (MT), a speaker (SP), and the like, which display an image of a visitor captured by a video camera (not shown) in the current call mode, are provided.

A ring signal generator 20 is a ringer IC IC12 connected to the trunk lines TIP and RING to generate a ring signal, and a transistor connected to an output terminal of the ringer IC IC12 on and off according to the ring signal. TR20 amplifies and outputs a ring signal, and a hook switch (H20) via a volume control element (V20) connected to the secondary side of the transformer (T20) to adjust the volume of the amplified ring signal. And speaker SP are connected to each other, and a ring signal detecting element S20 for detecting the ring signal generation is connected to an output terminal of the ringer IC IC12, while between the hook switch H20 and the speaker SP. Resistor (R26) is connected to reduce the volume of the ring signal generated from the speaker (SP) in the off-hook state, the second end of the transformer (T20) is connected to the standby sound (melody) in the call waiting state The transistor TR22 is connected and configured.

30 is a call signal rectifying unit connected to a trunk line (TIP) (RING) is connected to the line filter (L30) for line filtering the telephone signal surge suppression element (S30) for removing the surge (serge) contained in the telephone signal is connected It is composed.

40 denotes a first call path setting unit as a call signal rectifying unit 30, a call signal smoothing unit 50, or a call signal rectifying unit 30 and a second call path setting unit (2) by the wait signal WT of the controller 90. The handset relay R41 and the line filter T40 connected to the standby relay R40 are switched by the standby relay R40 and the handset control signal HC. It is comprised.

50 is a call signal smoothing unit for smoothing a call signal exchanged through the call path set by the first call path setting unit 40, and is connected to the handset relay RY41 of the first call path setting unit 40. FIG. And a bridge circuit (B50) for rectifying the call signal, a connector (C50) for signal exchange with the handset, and a sensor (S50) for detecting an off hook state of the hook switch (H20) and sending it to the control unit (90). do.

60 is an entrance door unit, and an audio transformer T60 for audio transmission between the audio unit (not shown) of the video camera and the second call path setting unit 80 is connected to a transistor TR60 to which an external call signal is input. And an external call signal (ODS) at a collector terminal of a transistor (TR60) having an emitter and a base connected to both ends of the video signal connecting connector (CN61) and one side of the transformer (T60) for display on a monitor (MT). Is configured to occur.

70 is a guard room call unit connected to the connector (CN70) that is connected to the guard line of the guard room is configured to be sent to the control element (IC90) of the control unit 90 by detecting the communication mode with the guard room by the sensor (S70). .

80 denotes a second call path setting unit, which is controlled by a relay call (RY80, RY81) and a door call control signal (OR) for switching the call path by a detour call control signal (TUN) output from the controller 90 to be described later. A relay RY82 for setting a call path is provided.

The control unit 90 is a control unit, which is configured by connecting the driving element IC91 and the connector CN90 for key input connection to the control element IC90 for outputting the first and second call path setting control signals while controlling each circuit unit.

As a melody generating unit 100, an amplifier IC101 is connected to the melody generating element device IC100 to generate a melody according to the melody generating control signal of the control element IC90 so as to be output to the inner speaker SP or the outside. Consists of.

Reference numeral 110 denotes a dial signal generator which is connected to the call signal smoothing unit 50 through the dial signal generating IC element IC110 and the connector CN110 having a call dialing keypad KY10 connected to each of the input terminals A to G. CN50) is connected to the call circuit unit 120 so that each call signal is exchanged and connected, and the side tone is transmitted to the receiver RX120.

120 is a call circuit part embedded in the handset HD of FIG. 1, and the handset TX120 and the receiver RX120 are connected to the voice amplifier IC 120, and a voice signal is input and output through the connector CN110. It is configured to output a side tone from 110.

In addition, 130 denotes a key input unit, the switch contacts SW10, SW11, SW12, and SW13 corresponding to the respective function keys K10, K11, K12, and K13 shown in FIG. 1, and the light emitting diodes for displaying the respective function states (LD131, LD132, LD133). And LD134, LD135, and a connector CN130 for key input to the controller 90.

140 is a power supply unit for supplying operating power to the videophone according to the present invention, the transistor TR140 switched by the main power supply MP and the transistors TR141 and TR142 turned on in accordance with the conduction state of the transistor TR140, The first to third voltage regulators RC140, RC141, and RC142 which smoothly output a predetermined voltage when the transistors TR141 and TR142 are connected to each other are provided.

The telephone call mode for a telephone call coming from an external subscriber line in the videophone according to the present invention configured as described above will be described.

When the TIP and RING signals arrive due to an external call, the ring signal generator 20 generates a ring signal from the ring signal generating IC element IC12 and amplifies the transformer T20 according to the on / off operation of the transistor TR20. The volume control element V20 is then adjusted to a predetermined level to notify that a call is made through the speaker SP. At this time, the ring signal output from the ring signal generating IC element IC12 is input to the light emitting element of the sensor S20 through the resistor R25, and thus a signal corresponding thereto is output from the light receiving element side so that the ring detection signal RD is generated. It is obtained and applied to the RD terminal, which is a ring signal sensing terminal of the control element IC90 of the control unit 90. Subsequently, when the handset HD is lifted for the call, the hook switch H20 is turned off and the sensor S50 in the call signal smoothing unit 50 is in a conducting state. The hook switching detection signal is applied to the HS terminal which is the hook-off detection terminal of the control element IC of the control unit 90 at. Accordingly, the control device IC90 outputs the high level standby signal WT and the handset control signal HC through the driving device IC91 to wait queue RY40 and the handset relay of the first call path setting unit 40. (RY41) is connected in the first contact connection state.

Subsequently, the call voice signal of the caller passes through the line filter L30 and the surge removing device S30 of the call signal rectifying unit 30, and unnecessary noise is filtered, and then the relay RY40, of the first call path setting unit 40, is filtered. It is rectified again in the nonpolar bridge rectifier B50 via the connection point shown by the solid line of RY41 and then connected to the call circuit unit 120 via the connector CN110 of the dial signal generating unit 110 through the connector CN50. Is approved. Accordingly, the call signal is amplified by the voice amplification IC device IC120 of the call circuit unit 120 and output from the receiver RX120, and the call voice signal of the respondent is input to the talker TX120 and the voice amplification IC device ( IC120) is then amplified and sent out in the reverse and reverse paths to perform the external telephone mode. In this way, automatic incoming and outgoing calls to external calls are possible.

On the contrary, when the user operates the dial key of the keypad KY10 while holding the handset HD of FIG. 1 to execute a call to the outside, a signal corresponding thereto is inputted to each input terminal A of the dial signal generating IC element 11. G) through the connector CN110 and the connector CN50 are rectified in the bridge diode B50 by being inputted through the input signal G to the G1, and is always in the first contact connection state (solid line). It is transmitted to an external station via relays RY40 and RY41 to make a desired call.

Next, the door call mode will be described. First, when a visitor operates a call button outside the front door, the visitor's image is captured by a video camera (not shown) and displayed on the monitor MT. The transistor TR60 is operated as applied to the audio transformer T60 and the transistor TR60 through the CN60, and the door call signal ODS is generated at the collector side, thereby controlling the control element IC90 of the controller 90. Is applied to. The control element IC90 outputs a control signal SPC and a melody generator 100 control signal based on the input door call signal ODS to drive the transistor TR22 in the ring signal generator 20. The ding sound generated by the melody generating unit 100 is transmitted through the speaker SP while outputting the low level sine light control signal OR and the handset relay control signal HC to set the second call path. The normally connected contact point of the relay RY82 of (80) is switched (indicated by a dotted line), and the normally closed contact point of the relay RY41 of the first call path setting unit 40 is switched to a dotted line state, so that the door call signal is audio. It is applied to the call circuit unit 120 similarly to the above-described telephone mode through the contacts shown by the dashed lines of the transformer T60, the relays RY80 and RY82, and the handset relay RY41 of the first call path setting unit 40. As a result, the intended door-to-door call is made.

In addition, in the call mode with the guard room by a call from the guard room or a call to the guard room, when a call request signal is input from the guard room through the connector for connection with the guard room, the sensor S70 is operated according to the signal. The guard ring signal GR is generated at the light receiving side output terminal of the sensor S70 and applied to the GR input terminal of the control element IC90 in the control unit 90. Accordingly, the control element IC90 outputs the low level handset control signal HS to switch the contact point of the handset relay RY41 of the second call path setting unit 40 to the state shown by the dotted line to communicate with the guard room. The telephone call is made through the changed contact point of the normally connected contact point (shown in solid line) of the relays RY81 and RY82 of the second call setting unit 80 and the relay RY41 of the first call path setting unit 40. Similar to the mode (or door communication mode) is applied to the call circuit unit 120 so that the desired guard room call mode is achieved.

Subsequently, when the user goes out, pressing the outing function selection key K13 (switch SW12 in Fig. 1) of Fig. 1 turns on the light-emitting diode LD133, indicating that the call is in the bypass call mode, and the key input signal is connected to the connector CN130. ) Is applied to the control element IC90 through the connector CN90 of the control unit 90, and accordingly, the control element IC90 generates the low level bypass call control signal TUN through the driving element IC91. The normally connected states of the relays RY80 and RY81 provided in the second call path setting unit 80 are switched in contact and connected in a dotted line connection state. Therefore, when the visitor presses the call button installed on the outside of the front door, the call signal is transmitted from the door call unit 60 to the second call path setting unit 80 via the relay switches RY80 and RY81 of the guard room call unit. It is connected to the guard room via 70, allowing the visitor to talk to the guard room.

On the other hand, when the telephone call signal from the outside in the guard room or the door-to-door mode, the ring signal generator 20 in the off-hook state of the hook switch (H20) is the resistance of the call signal volume adjusted by the volume controller (V20) (R26). In order to reduce the impact on the speaker (SP) again to reduce the impact on the guard room or the door.

When the telephone call arrives during the guard room call, the control element IC90 automatically terminates the guard room call while the hook switch H20 is pressed and released so that the above-mentioned call receiving operation is automatically performed. If there is a front door call, the ding dong sound is weakly heard by the resistor R26, and the monitor of the visitor is displayed on the monitor MT. In addition, when a telephone call arrives during the doorway, the door call is terminated by automatically pressing and releasing the hook switch H20, and the telephone call mode is automatically switched to the trunk line.

As described above, the video phone according to the present invention can provide a variety of call modes and functions by combining a telephone call function, an entrance and guard room call function, and a detour call function when going out to the video phone. There is an advantage.

Claims (6)

The ring signal generation unit 20 having the hook switch H20 is connected to the trunk line terminal (TIP) RING, and the call signal rectifying unit 30 for filtering the call signal is connected to the call line. The first call path setting unit 40 is connected, and one end of the first call path setting unit 40 is sequentially connected to the call signal smoothing unit 50 and the dial signal generating unit 110 in order to send the handset TX120 and the handset. While the RX120 is provided with a call circuit unit 120 is connected to the other end through the second call path setting unit 80 through the door call unit 60 and the guard room call unit 70, respectively, The ring signal generation unit 20, the first and second call path setting unit 40, 80 and the guard room call unit 70 is connected to the control unit 90 for setting their call path and the control unit The output of the melody generator 100 is connected to the speaker SP of the ring signal generator 20, the first call path setting unit 40, and the second call path at the output end of the 90. Unit are connected to transmission (80), said power supply terminal of each circuit has a power supply section 140 is connected, a video phone, which includes key input of the control unit 90 has a structure that a key input unit 130 is connected. The handset and the standby relay RY40 of claim 1, wherein the first call path setting unit 40 switches the voice signal path or the standby signal path by the standby signal WT of the controller 90. And a handset relay (RY41) for switching the handset communication path by the control signal (HC). The second call path setting unit 80 is configured to switch the trunk line passage, the entrance passage and the guard room passage by switching between the door call control signal OR and the bypass call control signal TUN. Video phone, characterized in that configured with a relay. According to claim 1, wherein the control unit 90 is the first call path setting unit 40 and the second call path when the guard room call request key is input from the key input unit 130 or a call request signal from the guard room is input. Videophone, characterized in that configured to control the setting unit 80, the call path is set through the guard room call unit (70). The method of claim 3 or 4, wherein the second call path setting unit (80) is driven by a deferred call control signal (TUN) of the control unit (90) to relay (R80) (R81) to switch the guard room path Videophone, characterized in that configured. The video phone according to claim 1, wherein the ring signal generator (20) is provided with a resistance element (R26) for reducing external telephone call sounds in the off hook state by the handset (HD).