JPH0742270U - Entrance cordless handset with TV camera - Google Patents

Abstract

(57) [Summary] [Structure] Interface 2 for connecting to base unit 1
A camera 3 for picking up an image of the visitor, a light emitting element 4 for illuminating the visitor, a video signal processing circuit 5 for processing a video signal transmitted from the camera, and a video processing signal which is modulated for transmission to the master unit. The modulation circuit 6, the remote control signal demodulation circuit 7 that demodulates the control signal sent from the master unit, the power supply circuit 8 that supplies the power supplied from the master unit to each unit of the slave unit, and the visitor sent from the camera. Control unit 9 for controlling the light emission amount and / or the light emission direction of the light emitting element based on the illuminance signal and the irradiation direction signal and / or the backlight correction signal transmitted from the remote control signal demodulation circuit. [Effect] Since the control unit controls the power supply to the light emitting element based on various signals transmitted from the parent device or the camera, the light emitting element emits light in an appropriate direction and with an appropriate light amount. Visitors can be surely confirmed on the monitor screen.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a TV camera-equipped front door device, and more particularly to a TV camera-equipped front door device that can control the power supply of a light-emitting element.

[0002]

[Prior art]

 As shown in FIG. 3, a conventional door cordless handset 100 with a TV camera has an interface 20 for connecting to the indoor base unit 1, a camera 30 for capturing an image of a visitor, and a camera 30 for capturing images when necessary. To transmit the light emitting element 40 that illuminates the visitor, the video signal processing circuit 50 that processes the video signal transmitted from the camera 30, and the video processing signal processed by the video signal processing circuit 50 to the master unit 1. A modulation circuit 60 for modulating, a remote control signal demodulation circuit 70 for demodulating a control signal sent from the parent device 1 via the interface 20, a camera 30, a light emitting element 40, a video signal processing circuit 50, a modulation circuit 60. , And a power supply circuit 80 that supplies power to the remote control signal demodulation circuit 70.

In the conventional door subunit 100 with a television camera having the above structure, when a call is made from the door subunit 100 side, the camera 30 of the gateway subunit 100 images the visitor and confirms the image of the visitor. Therefore, when power is supplied from the indoor master device 1, power is supplied from the interface 20 of the entrance slave device 100 to each part via the power supply circuit 80, the camera 30 is activated, and when the camera 30 captures a visitor, For the light emitting element 40 to be illuminated, power was supplied from the power supply circuit 80 to the light emitting element 40, and the infrared light emitting element 40 illuminated the visitor side.

[0004]

[Problems to be solved by the device]

 In the conventional door cordless handset 100 with a television camera, the infrared light emitting element 40 is only supplied with power from the power supply circuit 80, and the light emission amount, light emitting direction, light emitting timing, etc. are not controlled at all. Absent. Therefore, the infrared light emitting element 40 has a drawback that it does not always emit light at a proper timing and emits light in a fixed direction even when the surroundings are bright or dark.

[0005]

【Purpose】

 The present invention has been made to solve the above-mentioned conventional drawbacks, and is a front door unit with a TV camera that controls power supply to a light emitting element so that light is emitted in an appropriate direction and at an appropriate amount at an appropriate timing. The purpose is to provide.

[0006]

[Means for Solving the Problems]

 An entrance cordless handset with a TV camera according to the present invention is an interface for connecting with an indoor master unit, a camera for capturing an image of a visitor, a light emitting element for illuminating the visitor when the camera captures an image, and a transmission from the camera. The video signal processing circuit that processes the processed video signal, the modulation circuit that modulates the video processing signal processed by the video signal processing circuit to the master unit, and the control signal sent from the master unit via the interface. The remote control signal demodulation circuit that performs demodulation, the power supply circuit that supplies the power supplied from the master unit through the interface to the camera, video signal processing circuit, modulation circuit, and remote control signal demodulation circuit, and the video signal transmitted from the camera Based on the illuminance signal of the visitor processed by the processing circuit and the irradiation direction signal and / or the backlight correction signal transmitted from the base unit via the remote control signal demodulation circuit. It is obtained by a control unit for controlling the light emission amount and / or direction of light emission of the feeder light emitting element.

[0007]

[Action]

 The entrance device with a TV camera according to the present invention includes a illuminance signal of a visitor transmitted from the camera and processed by a video signal processing circuit, and an irradiation direction signal and / or a backlight signal transmitted from the master device via a remote control signal demodulation circuit. A control unit that controls the light emission amount and / or the light emission direction of the light emitting element based on the correction signal is provided, and the power supply to the light emitting element is controlled. Therefore, the light emitting element emits light at an appropriate timing, in an appropriate direction, and with an appropriate amount of light, and the visitor can be surely confirmed on the monitor screen of the parent device.

[0008]

【Example】

 Embodiments of a TV camera-equipped front cordless handset according to the present invention will be described below in detail with reference to the drawings. As shown in FIG. 1, an entrance cordless handset 10 with a TV camera according to the present invention has an interface 2 for connecting to an indoor master unit 1 having a monitor screen (not shown) and a lens 31 for imaging a visitor. Camera 3, a light-emitting element 4 that illuminates visitors when the camera 3 shoots, and a video signal processing circuit 5 that processes the video signal transmitted from the camera 3 into a standard video signal. A modulation circuit 6 that modulates the image processing signal processed by the video signal processing circuit 5 to send it to the base unit 1; and a remote control signal that demodulates the control signal sent from the base unit 1 via the interface 2. A demodulation circuit 7 and a power supply circuit 8 for supplying power to the camera 3, the video signal processing circuit 5, the modulation circuit 6, the remote control signal demodulation circuit 7 and the like are provided.

Further, the TV camera-equipped front door device according to the present invention passes through the illuminance signal and the remote control signal demodulation circuit 7 of the visitor, which is transmitted from the camera 3 and processed into a standard video signal by the video signal processing circuit 5. The control unit 9 controls the light emission amount and / or the light emission direction of the light emitting element 4 based on the irradiation direction signal and / or the backlight correction signal transmitted from the parent device 1. As shown in FIG. 2C, the control section 9 has a plurality of transistors 90, for example, as control elements. Besides transistors, FETs and thyristors are suitable. The number of emitted light may be controlled by controlling a plurality of light emitting elements with a plurality of transistors (or relays).

The operation of the entrance cordless handset with a TV camera according to the present invention will be described below. As shown in FIG. 2A, when the light emission amount of the infrared light emitting element 4 is adjusted depending on the illuminance of the visitor (subject), the illuminance signal of the subject transmitted from the camera 3 and processed by the video signal processing circuit 5 is controlled. When it is sent to the unit 9, the transistor 90 1 as a control element changes the bias and changes the voltage and current supplied from the power supply circuit 8 to adjust the light emission amount of the infrared light emitting element 4.

As shown in FIG. 2B, when the light emission amount of the infrared light emitting element 4 at the time of backlight compensation is adjusted, the control element 90 is normally turned off and the output voltage is low, so that the light emission is weak. However, when the backlight correction signal is sent from the remote control signal demodulation circuit 7 when operated by the master unit 1, the control element 90 is turned on, the output voltage from the control unit 9 becomes a high value, and the light emission is bright.

As shown in FIG. 2C, when the irradiation direction of the infrared light emitting element 4 is changed, the remote control signal demodulation circuit 7 operated by the master unit 1 outputs the pan tilt leftward signal as the irradiation direction signal to the control unit 9. When it is sent to one of the control elements 90 inside, the output voltage from the control element 90 to the infrared light emitting element 4 set to the left increases, and the infrared light emitting element 4 set to the left shines brightly to the left side. Is easier to see. When the pan / tilt rightward signal is sent to one of the other control elements 90 in the control unit 9, the output voltage from the control element 90 to the infrared light emitting element 4 set to the right increases and is set to the right. The infrared light emitting element 4 shines brightly and the right side becomes easy to see.

Although the infrared light emitting device is exemplified in the above-mentioned embodiment, other visible light emitting devices are also suitable.

[0014]

[Effect of device]

 As is clear from the above embodiments, the entrance slave device with the TV camera according to the present invention is transmitted from the camera and processed by the video signal processing circuit of the visitor's illuminance signal and the remote control signal demodulation circuit to the master device. The light emitting element has a control unit that controls the light emission amount and / or the light emitting direction of the light emitting element based on the transmitted irradiation direction signal and / or the backlight correction signal, and this control unit controls the power supply to the light emitting element. Emits light in the right direction at the right time and with the right amount of light, so that the handset can reliably check the visitors on the monitor screen of the base unit according to the illuminance.

[Brief description of drawings]

FIG. 1 is a view for explaining an entrance cordless handset with a television camera according to the present invention.

2 (a), (b) and (c) are diagrams for explaining the operation of the present invention.

FIG. 3 is a diagram illustrating a conventional entrance cordless handset with a television camera.

[Explanation of symbols]

 1 ... Indoor base unit 2 ... Interface 3 ... Camera 4 ... Light emitting element 5 ... Video signal processing circuit 6 ... Modulation circuit 7 ... Remote control signal demodulation circuit 8 ... Power supply circuit 9 ... Control unit 10 ... Entrance unit with TV camera

Claims (1)

[Scope of utility model registration request] 1. An interface (2) for connecting to an indoor master unit (1), a camera (3) for capturing an image of a visitor, and a light emitting element (4) for illuminating the visitor when the camera captures an image. ), A video signal processing circuit (5) for processing a video signal transmitted from the camera, and a modulation circuit (6) for modulating the video processing signal processed by the video signal processing circuit for transmission to the master unit. A remote control signal demodulation circuit (7) for demodulating a control signal sent from the master unit via the interface; and power supplied from the master unit via the interface to the camera and the video signal processing. A circuit, the modulation circuit, a power supply circuit (8) for supplying to the remote control signal demodulation circuit, the illuminance signal of the visitor transmitted from the camera and processed by the video signal processing circuit, and the remote controller. A control unit (9) for controlling the light emission amount and / or the light emission direction of the light emitting element based on the irradiation direction signal and / or the backlight correction signal transmitted from the master unit via a signal demodulation circuit. An entrance cordless handset with a TV camera.