JP3217636B2 - LCD display TV doorphone device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display television doorphone, and more particularly to a liquid crystal display television doorphone capable of adjusting the visibility of a liquid crystal display television monitor.

[0002]

2. Description of the Related Art Hitherto, there has been proposed a liquid crystal display television intercom apparatus capable of adjusting the visibility of a liquid crystal display television monitor. The LCD TV door apparatus as shown in FIG. 3, the entrance door station EQ ₁₀ having a camera 10 for generating a video signal of the imaged visitor, is connected via a line L ₁₀ in the entrance door station EQ ₁₀ and it has an indoor master unit MQ _10. Entrance cordless handset E
Speaker SP ₁₀ to Q _10, the microphone MIC _10, call button 1
1, also the speaker SP ₂₀ in the room master unit MQ _10, liquid crystal display TV monitor 12, the handset 13 are provided, respectively.

[0003] In the liquid crystal display television intercom apparatus configured as described above, a visitor receives an entrance control unit EQ.
_{When the} call button 11 is pressed at ₁₀ , the ringing sound is
Are ringing from the speaker SP ₂₀ of MQ _10, if off-hook the handset 13 of the called indoor base unit MQ _10, the speaker SP of the handset 13 and the entrance door station EQ _10
10 , you can talk with the microphone MIC ₁₀ and the camera 1
The video signal of the visitor imaged at 0 can be monitored on the LCD monitor 12.

In order to make such a liquid crystal display television monitor 12 easy to see, for example, as shown in FIG.
Angle adjustment mechanism 1 of liquid crystal display television monitor 12A
4 includes the indoor base unit MQ _10, adjusted easily visible position LCD TV monitor 12A. Also, as shown in FIG. 5, the brightness control voltage of the liquid crystal display television monitor 12B is adjusted to
Make it easier to see without changing the angle of 2B.

[0005]

However, since the position of the eyes with respect to the liquid crystal display television monitor may change when the indoor person to be monitored changes, the adjustment is made so that the indoor person can easily view the liquid crystal display television monitor each time. Must. Further, in the indoor base unit MQ ₁₀ having an angle adjustment mechanism 14 will become expensive TV door apparatus so mechanically more complicated than the indoor base unit that uses the CRT television monitor, also the movable portion of the angle adjusting mechanism Has a disadvantage in reliability.

[0006]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned conventional problems, and a liquid crystal display for automatically adjusting the brightness of a liquid crystal display television monitor by a sensor capable of detecting the height of an indoor person. An object of the present invention is to provide a TV door phone device.

[0007]

According to the present invention, there is provided a liquid crystal display TV door intercom apparatus for achieving the above object, comprising: a camera for generating a video signal of an image of a visitor; a call button for generating a call signal; A main unit having a speaker and a microphone to perform the call, and an indoor master unit having a handset connected to the main unit by a line and transmitting and receiving a call to and from the speaker and the microphone of the main unit, and receiving a call signal from the main unit A power supply circuit for supplying power to the camera, a liquid crystal display TV monitor that outputs a video signal captured by the camera and is monitored by a room occupant, and a height of the room occupant juxtaposed on the outer surface of the liquid crystal display TV monitor. A plurality of sensors to be detected, a height signal circuit for outputting a height signal based on sensor outputs of the plurality of sensors generated according to the height, and a height signal The height signal from the circuit and has a liquid crystal power source control circuit for controlling the brightness of the liquid crystal display television monitor.

[0008]

When the call button is depressed by the visitor at the entrance device, a call signal generated from the call button is received by the call detection circuit, and the power supply circuit drives the camera of the entrance device based on the call signal. The image signal of the visitor imaged by the driven camera is output by the liquid crystal display television monitor of the indoor master unit. At this time, the height of the room person is detected by a plurality of sensors juxtaposed on the liquid crystal display television monitor, and the sensor output generated according to the height of the room person is input to the height signal detection circuit from the plurality of sensors. A height signal based on the sensor output sent from the height signal detection circuit is input to a liquid crystal power control circuit,
The liquid crystal power control circuit controls the luminance of the liquid crystal display television monitor based on the height signal.

[0009] This makes it possible to provide an easy-to-view screen without the need for a room person to directly adjust the liquid crystal display television monitor.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a liquid crystal display television doorphone apparatus will be described below with reference to the drawings. As a liquid crystal display TV door device of the present invention shown in FIG. 1, a camera 1 for generating a video signals S ₁ of the captured visitor, call buttons 2 for generating a calling signal S _3, the speaker SP ₁ for transmitting and receiving the call , An entrance cordless handset E having a microphone MIC ₁
And Q _1, the speaker SP ₁ of the entrance door station EQ _1, the microphone MIC ₁
And an indoor base unit MQ ₁ having a handset 3 for sending and receiving calls and.

The entrance slave unit EQ ₁ has a demultiplexing circuit 4 connected to the indoor master unit MQ ₁ . Camera 1 This is the demultiplexer 4 via a modulating circuit 5, a speaker SP ₁ and the microphone MIC ₁ via the speech circuit 6, call buttons 2 through the call circuit 7, power source further supplies the power supply + B to the individual circuit components The supply circuits 8 are respectively connected. The indoor parent device MQ ₁ has a liquid crystal display television monitor 9 for outputting a video signal S ₁ from the camera ₁ of the entrance child device EQ ₁ . This liquid crystal display television monitor 9 is based on an X driver 10 for controlling the liquid crystal voltage in the X-axis direction, a Y driver 11 for controlling the liquid crystal voltage in the Y-axis direction, and a video signal S ₁ from the camera 1 of the entrance device EQ _1. It is controlled by a driver control 12 that drives an X driver 10 and a Y driver 11. The driver control 12 is connected to a demultiplexing circuit 14 via a demodulation circuit 13.
The demultiplexing circuit 14 are mutually connected to the demultiplexing circuit 4 of the entrance door station EQ ₁ by line L _1.

Indoor master unit MQ₁X driver 10 and Y
The driver 11 is an indoor master unit MQ₁LCD display
Indoor master unit MQ juxtaposed on the outer surface of the Levi monitor 9₁Use
Temperature sensor, which detects the height of a room person
It is controlled by the sensors 15a, 15b, 15c. Body temperature
The sensors 15a, 15b, 15c are, for example, infrared rays emitted from the human body.
A pyroelectric infrared sensor that detects radiation (body temperature) is used.
You. Pyroelectric infrared sensors convert infrared energy into electrical energy.
A temperature sensor that uses pyroelectricity to convert to energy.
iTaO_Three(Lithium tantalate), Sr_1-XBa_XNb_Two
O₆(Barium strontium niobate), Pb_FiveGe_Three
O₁₁(Lead germanate), PbTi_1-XZr_XO _Three(Titanium
Lead zirconate), PbTiO_Three(Lead titanate)
Used as a pyroelectric material and has a function as a sensor
It has been made into an element in order to Such pyroelectric infrared
When the sensor hits the pyroelectric material with infrared light from the human body,
This pyroelectric material is heated and slightly expands and contracts.
The excess charge on the face layer is reduced and is paired with that charge.
Remaining floating charge. Take this extra floating charge out
A focus current is set, and a human body is detected by the focus current.

The body temperature sensors 15a, 15b, 15c
The body temperature sensor 15a, 15b, are connected to a height signal circuit 16 for outputting a height signal S ₂ by the sensor output 15c. The height signal circuit 16 are connected by a height signal S ₂ to the liquid crystal power source control circuit 17 for controlling the brightness of the liquid crystal display television monitor 9, the liquid crystal power source control circuit 1
7 is connected to the X driver 10 and the Y driver 11, respectively.

Here, the height signal circuit 16 is shown in FIG.
As shown in (a), mainly an AND circuit 18a, a NAND
Circuit 18b, an inverter 19a, 19b, is configured by PNP-type transistor Tr _1, NPN type transistor Tr _2. Temperature sensors 15a, 15b, 15c are connected to the input side of the AND circuit 18a, the output side of the AND circuit 18a is connected to the base of an NPN transistor Tr ₂ via the resistor R _1. Between the resistor R _1, the NPN-type transistor Tr ₂ base is connected to a resistor R ₂ that is grounded. Body temperature sensors 15a and 15b are connected to the input side of NAND circuit 18b via inverters 19a and 19b, respectively.
It is directly connected to the input side of the circuit 18b. This NAN
The output side of the D circuit 18b is connected to the base of a PNP transistor Tr ₁ via the resistor R _3. Resistance R ₃ , P
Between the base of the NP type transistor Tr ₁ resistor R ₄ is connected, the resistor R ₄ is connected to the emitter of a PNP transistor Tr _1.

[0015] The emitter of the PNP type transistor Tr ₁ is connected to a power supply V _CC, the power supply V _CC resistance R _5,
It is grounded via R ₆ , R ₇ and R ₈ . Resistance R ₅ , R ₆
The collector of the PNP transistor Tr ₁ is connected between the resistors, the collector of the NPN transistor Tr ₂ is connected between the resistors R ₇ and R _8, and the emitter of the NPN transistor Tr ₂ is grounded. The liquid crystal power supply control circuit 17 is connected between the resistors R ₆ and R ₇ .

As shown in FIG. 1, the demultiplexing circuit 14 of the indoor master unit MQ ₁ receives a ring tone speaker SP ₂ via a handset 3, a ring detection circuit 21 and a ring tone transmission circuit 22 via a communication circuit 20. + B to each part of the circuit
Are connected to each other. The call detection circuit 21 is connected to a CPU 24 to which a hook switch SW is connected.
3, are connected to the communication circuit 20 and the power supply circuit 23, respectively.

In the liquid crystal display TV intercom apparatus configured as described above, the entrance cordless handset EQ is
If the call button 2 is pressed in _1, since call detection circuit 21 drives the ringer sending circuit 22 detects a call, ringing sound is produced from the ringing tone speaker SP ₂ of the indoor base unit MQ _1.
The CPU 24 drives the power supply circuit 23 and the entrance device E
Since supplying power to the camera 1 for Q ₁ can monitor the video signals S ₁ visitor picked up by the camera 1 in a liquid crystal display TV monitor 9, the indoor people handset 3
Speaker SP ₁ of the handset 3 and the entrance door station EQ ₁ indoor base unit MQ ₁ by the off-hook, the microphone MIC
_You can talk to _one .

At this time, as shown in FIGS. 2 (a) and 2 (b), the indoor person I who is taller than the indoor person ID ₂ having an average height.
Temperature sensor 15a if D ₁ is off-hook the handset 3, 15b, because 15c is sensor output together,
AND circuit 18a provides a high-level driving signal to the base of an NPN transistor Tr _2, the NPN-type transistor Tr ₂ to the ON state. On the other hand, the sensor output of the NAND circuit 18b from temperature sensors 15a and 15b becomes a low level output by the inverter 19a and 19b, provide a high level drive signal to the base of a PNP transistor Tr _1, the PNP transistor Tr ₁ To the off state. When the PNP transistor Tr ₁ is turned off and the NPN transistor Tr ₂ is turned on, the brightness control voltage V ₀ (height signal S ₂ ) becomes low, so that the liquid crystal power supply control circuit 17 uses the X driver 10 and the Y driver 11 To make the brightness adjustment of the liquid crystal display television monitor 9 bright. Thereby, even if the position of the eyes of the room person ID _{1 is} the viewing angle A looking down at the center of the liquid crystal display television monitor 9, it is possible to automatically obtain the optimum brightness of the screen.

When the indoor person ID ₃ shorter than the average indoor person ID ₂ goes off-hook the handset 3, only the body temperature sensor 15c outputs a sensor.
ND circuit 18a provides a low level drive signal to the base of an NPN transistor Tr _2, an NPN transistor T
to turn off the r _2. On the other hand, since the NAND circuit 18b does not output a sensor from the body temperature sensors 15a and 15b, the output becomes high level by the inverters 19a and 19b. Thus giving low level drive signal to the base of a PNP transistor Tr _1, the PNP-type transistor Tr ₁ in the ON state. PNP transistor T
When r ₁ is on and NPN transistor Tr ₂ is off, the brightness control voltage V ₀ increases. Therefore, the liquid crystal power supply control circuit 17 adjusts the brightness of the liquid crystal display television monitor 9 via the X driver 10 and the Y driver 11. To a dark state. As a result, the position of the eyes of the room person ID ₃ becomes the viewing angle C looking up at the center of the liquid crystal display television monitor 9.
Even so, the optimal brightness of the screen can be obtained automatically.

Further, the average because the room's ID ₂ of tall temperature sensors 15b and 15c are sensor output when the off-hook of the handset 3, the AND circuit 18a is low level of the drive signal to the base of an NPN transistor Tr ₂ the given, the NPN-type transistor Tr ₂ in the oFF state. On the other hand, in the NAND circuit 18b, the body temperature sensor 15a does not output the sensor, the inverter 19a outputs a high level signal, and the body temperature sensor 15b outputs the sensor, and the inverter 1 outputs
9b is a low-level output, and the body temperature sensor 15c is a sensor output, so that a high-level output is obtained. Accordingly fed a high-level driving signal to the base of a PNP transistor Tr _1, the PNP-type transistor Tr ₁ in the OFF state. When both the PNP transistor Tr ₁ and the NPN transistor Tr ₂ are turned off, the luminance control voltage V ₀ does not change. Therefore, the liquid crystal power supply control circuit 17 adjusts the luminance of the liquid crystal display television monitor 9 via the X driver 10 and the Y driver 11. To medium brightness. Thereby, even if the position of the eye of the room person ID _{2 is at} the viewing angle B substantially parallel to the center of the liquid crystal display television monitor 9, it is possible to automatically obtain the optimal brightness of the screen.

In the above embodiment, the height is detected by three body temperature sensors. However, the present invention is not limited to this.
The number may be increased or decreased according to the detection accuracy. Further, in the above embodiment, the height was detected by the body temperature sensor. However, the present invention is not limited to this, and a plurality of directional microphones may be used as long as the screen is automatically adjusted to an easy-to-view screen after the call state. .

[0022]

As is clear from the above embodiments, the liquid crystal display television doorphone apparatus of the present invention detects the height of a room person using a plurality of sensors juxtaposed on the outer surface of the liquid crystal display television monitor. The brightness of the liquid crystal display television monitor can be automatically adjusted to a viewing angle that matches the position of the indoor person's eyes based on the sensor output of the sensor, so that the indoor person can always obtain a screen that is easy to view. In addition, since the screen can be easily viewed without providing an angle adjusting mechanism for adjusting the angle of the liquid crystal display television monitor, mechanical reliability can be improved.

[Brief description of the drawings]

FIG. 1 is a block diagram showing one embodiment of a liquid crystal display television door phone apparatus according to the present invention.

FIGS. 2A and 2B are diagrams of a liquid crystal display television doorphone device according to the present invention, wherein FIG. 2A is an explanatory diagram showing an operation of a height signal circuit, and FIG. 2B is an explanatory diagram showing a relationship with indoor persons having different heights.

FIG. 3 is a block diagram of a conventional liquid crystal display television door phone apparatus.

FIG. 4 is a perspective view of a conventional liquid crystal display television door phone apparatus.

FIG. 5 is a perspective view of a conventional liquid crystal display television door phone apparatus.

[Explanation of symbols]

1 Camera 2 Call button 3 Handset 8 Power supply circuit 9 Liquid crystal display TV monitor 15a, 15b, 15c Body temperature sensor (sensor) 16 Height signal circuit 17 Liquid crystal power supply control Circuit EQ ₁ ‥‥ Entrance cordless handset MQ ₁ ‥‥ Indoor master unit SP ₁ ‥‥ Speaker MIC ₁ ‥‥ Microphone L ₁ ‥‥ Line

Claims (1)

(57) [Claims] An entrance having a camera (1) for generating an image signal of a visitor, a call button (2) for generating a call signal, a speaker (SP ₁ ) for transmitting and receiving a call, and a microphone (MIC ₁ ). A slave unit (EQ ₁ ); and an indoor master unit (MQ ₁ ) having a handset (3) connected to the entrance slave unit by a line (L ₁ ) and transmitting / receiving a call to / from the speaker and microphone of the entrance slave unit. A power supply circuit (23) for supplying power to the camera when the call signal is received from the entrance cordless handset; and a liquid crystal display that outputs a video signal captured by the camera and is monitored by a room occupant. A television monitor (9) and a plurality of sensors (15a, 15b,
15c), a height signal circuit (16) for outputting a height signal based on the sensor outputs of the plurality of sensors generated according to the height, and controlling the brightness of the liquid crystal display television monitor with the height signal from the height signal circuit. And a liquid crystal power supply control circuit (17).