JPH10243381A - Color video doorphone system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a color video doorphone system with which color images can be projected even in daytime or night time. SOLUTION: This system is provided with a hand set S1 equipped with a white LED unit S11 for irradiating an object with white light and a CCD color camera S12 for generating a video signal by picking up the image of irradiated object, and a reflection board S112 for radiating white light from the white LED toward the object and a white deffusion board S14 for deffusing the white light reflected by the reflection board and irradiating the object are provided. Besides, by arranging plural white LED S111 over all the surface of white deffusion board, a color filter and a related mechanism are unnecessitated, the white light from the white LED can be efficiently radiated toward the object, and color images can be surely projected even at night.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a color television intercom apparatus, and more particularly to a color television intercom apparatus capable of displaying a color image even at night.

[0002]

2. Description of the Related Art As shown in FIG. 2 (a), a conventional color television door phone apparatus has an infrared LED for irradiating a subject.
Unit S21, a CCD color camera that captures an image of a subject illuminated by the infrared LED S21 and generates a video signal
A slave S2 including S22 and a CdS light receiving element S23 that senses the illuminance for illuminating the subject and identifies day / night;
And a main unit M2 having an LCD color monitor M21 for outputting a video signal generated by the second CCD color camera S22. A line L2 for calling and calling is provided between the main unit M2 and the sub unit S2. Connected by

In this color television door phone apparatus,
On the slave unit S2 side, the CdS light receiving element S23 senses the illuminance and distinguishes between day and night. In the daytime, the illuminance by sunlight is high, so the slave unit S2 is in the color mode, and the infrared LED unit
S21 is turned off, and as shown in FIG.
Color filter S25 is inserted between 20 and lens S24,
On the parent device M2 side, a color image is projected by the LCD color monitor M21.

At night, the illuminance is low due to the illumination light.
Becomes black and white mode, infrared LEDS21 is turned on,
The color filter S25 is removed from between the camera S20 and the lens S24 to eliminate the influence of infrared rays to prevent blurring of the image. On the master device M2 side, a monochrome image is displayed by the LCD color monitor M21.

[0005]

Since the conventional color television door phone apparatus is configured as described above, FIG.
As shown in (c), the color mode cannot be used at night,
There was a drawback that the mode became black and white and the actual feeling was light. Also, a color filter S25 is provided between the camera S20 and the lens S24.
There is also a drawback that a mechanism (not shown) for inserting / removing the device is required.

The present invention has been made to solve such a problem, and an object of the present invention is to provide a color television intercom apparatus capable of displaying a color image even at night.

[0007]

In order to achieve this object, a color television door phone apparatus according to the present invention comprises a white LED unit for illuminating a subject with white light and a white LE unit.
A slave unit equipped with a CCD color camera that captures an image of a subject illuminated by the D unit and generates a video signal; It has.

The white LED unit of the color television door phone apparatus according to the present invention includes a reflector for emitting white light from the white LED toward the subject, and a white light reflected by the reflector for diffusing toward the subject. And a white diffuser plate for irradiation. Further, the white LED unit of the color television doorphone device according to the present invention includes a white diffusion plate for diffusing white light and irradiating the white light toward a subject, and a plurality of white LEDs are arranged on the entire surface of the white diffusion plate.

The color television door phone apparatus according to the present invention can display a color image on the color monitor of the master unit even at night, does not require a color filter and a mechanism related thereto, and efficiently emits white light from a white LED. It can radiate toward the subject.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below in detail with reference to the drawings. As shown in FIG. 1 (a), the color television doorphone device according to the present invention includes:
The master unit M1 and the slave unit S1 are connected by a line L1 for calling and calling. The slave unit S1 includes a white LED unit S11 that emits white light and irradiates the subject with white light, and a CCD color camera S12 that captures an image of the subject illuminated by the white LED unit S11 and generates a video signal. The master unit M1 is an LCD color monitor M1 that outputs a video signal generated by the CCD color camera S12 of the slave unit S1.
Has one.

Further, as shown in FIG. 1B, the white LED unit S11 of the color television door phone apparatus according to the present invention emits white light from the white LED S111 toward the subject, and has a bowl-shaped reflector. The white LED S111 is provided around the white LED S111, and a white diffuser S14 that diffuses the white light reflected by the reflector S112 and irradiates the white light toward the subject is provided facing the white LED S111 and the reflector S112. The shape of the reflection plate S112 is preferably a shape (not shown) whose cross section corresponds to the side surface of a cone, and is not limited to a bowl shape.

The white LED S111 is preferably a known one in which a YAG (yttrium aluminum garnet) -based phosphor is coated on the surface of a blue LED chip.
Attached to S113. Further, the white LED unit S11 of the color TV door phone apparatus according to the present invention is the same as that shown in FIG.
As shown in (c), a white diffusion plate S14 for diffusing white light and irradiating the object toward the subject is provided, and a plurality of white LEDs S111, S111, ... are arranged over the entire surface of the white diffusion plate S14. is there.

An explanation seal S114 is attached to the surface of the white diffusion plate S14. Next, the operation of the color television door phone apparatus according to the present invention will be described. White LE attached to PC board S113 regardless of day or night on slave unit S1
White light is emitted from DS111. The white light radiated from the white LED S111 is reflected by the reflection plate S112, and then is diffused by the white diffusion plate S14.
White light is emitted to the subject via the
The CD color camera S12 can read a color image even at night, and the master device M1 displays a color image on the LCD color monitor M11 regardless of day or night.

On the side of the slave unit S1, a plurality of white LEDs mounted on the PC board S113 are provided over the entire surface of the white diffusion plate S14.
White light is emitted from EDS111, S111, ... day and night, and white light emitted from white LEDS111 is a white diffuser.
Since it is diffused and radiated to the subject in S14, the CC of the slave S1
The D color camera S12 can read color images even at night, and the master device M1 displays color images on the LCD color monitor M11 regardless of day or night.

White LED S111, reflector S112, white diffuser
By employing S14 and employing a plurality of white LEDs S111 over the entire surface of the white diffuser plate S14, a color image can be projected on the master device M1 side even at night, and the color filter and a mechanism related thereto are not required. In addition,
In the above-described embodiment, the case where the white LED S111 is turned on regardless of day and night has been described. However, an irradiation ON / OFF control circuit or an operation switch that turns on the white LED S111 only at night may be provided. A similar effect is achieved.

[0016]

As is apparent from the above description, the color television doorphone apparatus according to the present invention generates a video signal by imaging a subject illuminated by the white LED unit and the white LED unit for illuminating the subject with white light. A slave provided with a CCD color camera, and the CCD of the slave
Since it has a main unit with a color monitor that outputs video signals generated by a color camera, color images can be projected on the main unit color monitor even at night,
A color filter and a mechanism related thereto can be eliminated.

The white LED unit of the color television door phone apparatus according to the present invention includes a reflector for radiating white light from the white LED toward the subject, and a diffuser for the white light reflected by the reflector to direct the white light toward the subject. The white light from the white LED can be efficiently emitted toward the subject. Furthermore,
The white LED unit of the color TV door phone apparatus according to the present invention includes a white diffusion plate for diffusing white light and irradiating the white light toward the subject, and a plurality of white LEDs are arranged on the entire surface of the white diffusion plate, so that the white LED unit can be reliably used even at night. Color images.

[Brief description of the drawings]

FIGS. 1A to 1C are diagrams illustrating the configuration of a television door phone device according to the present invention.

FIGS. 2A to 2C are diagrams illustrating the configuration of a conventional TV door phone apparatus.

[Explanation of symbols]

 S1… Slave device S11… White LED unit S111… White LED S112… Reflector S12… CCD color camera S14… White diffuser M1… Main device M11… LCD color monitor

Claims (3)

[Claims] 1. A slave unit (S1) including a white LED unit (S11) for illuminating a subject with white light and a CCD color camera (S12) for imaging a subject illuminated by the white LED unit and generating a video signal. And a master unit (M1) including a color monitor (M11) for outputting a video signal generated by the CCD color camera of the slave unit. 2. The white LED unit comprises a white LED.
A reflector (S112) for emitting the white light from (S111) toward the subject; and a white diffuser (S1) for diffusing the white light reflected by the reflector and irradiating the subject with the white light.
The color television door phone apparatus according to claim 1, further comprising: (4). 3. The white LED unit includes the white diffusion plate for diffusing the white light and irradiating the white light toward the subject, and a plurality of the white LEDs are arranged on the entire surface of the white diffusion plate. The color television door phone apparatus according to claim 1, wherein