KR20150092670A - Security camera - Google Patents

Abstract

The present invention relates to a monitoring camera. The present invention includes: a housing; a window installed on the front side of the housing; an infrared illumination unit installed around the window on the front side of the housing; a camera unit installed within the housing and arranged on the back side of the window; a sun shield connected to the housing to block light incident to the window; and a blocking member installed in the window and blocking the light, emitted from the infrared illumination unit and reflected on the sun shield, not to be incident to the camera unit via the window by opening a regular area of the window and forming the remaining area of the window with opaque material.

Description

Security camera {Security camera}

The present invention relates to a camera, and more particularly, to a surveillance camera.

Generally, a surveillance camera is a device installed in a building or the like to acquire an image of a specific space or a specific location. Such a surveillance camera is designed to install a camera inside a housing and acquire an external image through a window installed in the housing. In this case, the surveillance camera may be equipped with an infrared ray illuminator or the like for emitting light to the outside and taking reflected light when the amount of light is small, such as at night.

In addition, the surveillance camera may include a line shield for blocking a part of the light when the light is over, such as during the daytime. At this time, the line shield may be installed mainly on the upper side of the housing.

On the other hand, when the surveillance camera acquires an external image, the external image acquisition can be performed smoothly when the amount of light is sufficient, such as during the daytime. At this time, the surveillance camera can obtain a clear image by adjusting the amount of light incident from the outside through the line shield.

In addition, an infrared ray illuminating unit can be used to obtain a clear image when the amount of light is insufficient such as at night. At this time, the light emitted from the infrared illuminating unit as described above is reflected after colliding with an external object and returns to the surveillance camera, so that the image can be acquired from the camera.

As described above, when the infrared ray is emitted from the infrared ray illuminating unit, a part of the infrared ray collides with the ray shield and can enter into the window again. At this time, diffuse reflection occurs due to the infrared ray as described above, so that a clear image can not be obtained. Therefore, in order to obtain a clear image in the case of night and the like, it can be decided whether or not a clear image can be obtained depending on how effectively the diffuse reflection is removed.

On the other hand, the above-mentioned surveillance camera is specifically disclosed in Korean Patent Laid-Open Publication No. 2012-0029321 entitled "Apparatus for Preventing Irregular Shooting of a Surveillance Camera, Applicant: C &

Korea Patent Publication No. 2012-0029321

Embodiments of the present invention provide a surveillance camera.

The present invention also provides an infrared illuminating unit provided on a front surface of the housing around the window, a camera disposed inside the housing, and a camera disposed on a rear surface of the window, A light shielding unit connected to the housing and shielding light incident on the window; a light shielding unit installed in the window, wherein a certain area of the window is open and the other part of the window is made of an opaque material, And a blocking member for blocking the light reflected by the line shield from being incident on the camera unit through the window after emitting from the illumination unit.

Also, the camera unit may include an image sensor for sensing an image through light incident through the window, and the shape of the blocking member may correspond to the shape of the image sensor.

Also, the camera unit may include a lens unit for refracting light incident through the window, and the lens unit and the window may be installed in the housing such that the lens unit and the window are not parallel to each other.

In addition, the distance from the window to the lens unit may be smaller than the lower portion of the lens unit.

In addition, the portion of the blocking member that opens a certain region of the window may be formed in a rectangular shape.

Embodiments of the present invention can achieve sharp image quality by preventing diffuse reflection phenomenon.

1 is a sectional view showing a surveillance camera according to an embodiment of the present invention.
2 is a side view showing the surveillance camera shown in Fig.
FIG. 3 is a view comparing an image of a conventional surveillance camera with the image of a blocking member shown in FIG.
FIG. 4 is a view comparing images of the surveillance camera shown in FIG. 1 according to changes in the optical axis.

BRIEF DESCRIPTION OF THE DRAWINGS The present invention will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG. The present invention may, however, be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. Is provided to fully convey the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims. It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. In the present specification, the singular form includes plural forms unless otherwise specified in the specification. It is noted that the terms "comprises" and / or "comprising" used in the specification are intended to be inclusive in a manner similar to the components, steps, operations, and / Or additions. The terms first, second, etc. may be used to describe various elements, but the elements should not be limited by terms. Terms are used only for the purpose of distinguishing one component from another.

1 is a sectional view showing a surveillance camera 100 according to an embodiment of the present invention. 2 is a side view showing the surveillance camera 100 shown in Fig. FIG. 3 is a diagram comparing images of a surveillance camera 100 shown in FIG. 1 with a conventional surveillance camera. FIG. 4 is a diagram comparing images of the surveillance camera 100 shown in FIG. 1 according to the change of the optical axis.

1 to 4, the surveillance camera 100 may include a housing 110 in which a space is formed. At this time, a circuit board 180 connected to a camera unit 140 to be described later may be installed inside the housing 110, and another structure, cable, or the like may be installed.

The surveillance camera 100 may include a window 120 installed on a front surface of the housing 110. The window 120 may be formed of a transparent material, for example, the window 120 may be formed of acrylic, glass, or the like.

The surveillance camera 100 may include an infrared illumination unit 130 installed on the front surface of the housing 110 around the window 120. The infrared illumination unit 130 may include an LED lamp that emits infrared rays to the outside. At this time, a plurality of infrared illuminating units 130 may be provided, and a plurality of infrared illuminating units 130 may be disposed to be spaced apart from each other. In particular, the plurality of infrared ray illuminators 130 may be arranged to surround the outer surface of the window 120.

The infrared illumination unit 130 may be installed to be inserted into the housing 110. At this time, the infrared illumination unit 130 may be completely inserted into the housing 110, or may be installed in the housing 110 so that a part of the infrared illumination unit 130 is led to the outside. When the infrared illumination unit 130 is completely inserted into the housing 110, the front surface of the housing 110 provided with the infrared illumination unit 130 may be formed of a translucent or transparent material.

The surveillance camera 100 may include a camera unit 140 disposed inside the housing 110 and disposed on the rear surface of the window 120. [ The camera unit 140 may include a lens unit 141 fixed to the housing 110 and an image sensor 142 for sensing light incident from the lens unit 141 and generating an image. The lens unit 141 may be formed of at least one lens.

The optical axis of the lens 141 and the image sensor 142 may be the same. Particularly, the light incident through the center of the lens unit 141 can be vertically incident on the image sensor 142.

The lens unit 141 may be disposed such that the lens unit 141 and the window 120 are not parallel to each other. For example, the distance between the lens portion 141 and the window 120 may be different according to the height direction of the window 120. [ The distance S1 between the upper end of the lens unit 141 and the window 120 may be smaller than the distance S2 between the lower end of the lens unit 141 and the window 120. [ At this time, the image sensor 142 may form an angle with respect to the window 120 like the lens unit 141. In particular, the optical axis of the lens unit 141 and the image sensor 142 may not form a right angle with the window 120.

The surveillance camera 100 may include a line shield 150 connected to the housing 110 to block light incident on the window 120. The wire shield 150 may be inserted into and fixed to the housing 110, and may include a coupling portion formed in a ring shape. In addition, since the upper portion of the housing 110 is longer than the other portions, the sunshield 150 can shield sunlight mainly.

The surveillance camera 100 is installed in the window 120 and opens a certain area R of the window 120. The other part of the window 120 is formed of an opaque material and is emitted from the infrared illumination unit 130 And a blocking member 160 for blocking light reflected by the backlight shield 150 from entering the camera unit 140 through the window 120.

At this time, the blocking member 160 may be formed in various ways. For example, the blocking member 160 may be formed of a low light-shielding sheet, matte printing, ink, or the like. Hereinafter, for convenience of explanation, the case where the blocking member 160 is a low light shielding sheet will be described in detail.

The blocking member 160 may be formed such that a certain area is opened. At this time, the shape of the open region of the blocking member 160 may be formed to correspond to the sensing region of the image sensor 142. For example, the shape of the open area of the blocking member 160 may be rectangular.

The surveillance camera 100 may include an illuminance sensor 170 disposed on the back surface of the window 120 and installed in the housing 110. At this time, the illuminance sensor 170 can determine the operation of the infrared illuminator 130 by measuring the brightness of the outside.

Meanwhile, the operation of the surveillance camera 100 will be described. First, the infrared illuminator 130 may not operate during the day. At this time, it is possible to determine whether the infrared ray illuminator 130 is operated based on the measured value of the illuminance sensor 170.

On the other hand, when the amount of light is insufficient as in the night, the infrared ray illuminator 130 can be operated based on the measured value of the illuminance sensor 170. When the infrared illumination unit 130 operates, the infrared illumination unit 130 can irradiate the infrared rays to the outside.

At this time, the infrared rays are reflected after colliding with an external object, and are incident on the image sensor 142 through the window 120 and the lens unit 141. The image sensor 142 senses the incident light, Can be generated.

The infrared rays irradiated from the infrared illumination unit 130 can be incident on the image sensor 142 through the window 120 and the lens unit 141 after colliding with the wire shield 150. [ At this time, as described above, the light incident on the image sensor 142 after colliding with the line shield 150 may be reflected by an external object and generate interference between the incident light and diffused reflection.

Particularly, when the diffuse reflection occurs as described above, a phenomenon (region A) in which the light is blurred as shown in FIG. 3A occurs and a clear image can not be obtained. Such a phenomenon occurs in the entire image, and since the surveillance camera 100 can not obtain a clear image, the purpose of the surveillance camera 100 can not be achieved.

In this case, when the blocking member 160 is formed on the window 120 as described above, irregular reflection phenomenon occurring in the edge region or the periphery of the image can be removed as shown in FIG. 3 (b).

Specifically, since the blocking member 160 is formed in a shape corresponding to the sensing area of the image sensor 142, light reaching the non-sensing area of the image sensor 142 can be blocked. In addition, the blocking member 160 blocks a part of the light reflected by the line shield 150, thereby minimizing the interference between the light reflected from the external object.

3 (b), the blocking member 160 prevents the light irradiated from the infrared ray illuminating unit 130 from being reflected by the ray shield 150 to be incident on the image sensor 142, ) Can be eliminated.

In addition, in addition to the above-described case, the optical axis of the camera unit 140 may be formed at an angle other than perpendicular to the window 120, thereby preventing irregular reflection. Specifically, when the corner portion (region B) of Fig. 4 (a) is viewed, an unclear portion may occur in the image. This phenomenon may be caused by a diffuse reflection phenomenon occurring when infrared rays reflected by the wire shield 150 are incident on the image sensor 142 as described above.

At this time, when the optical axis of the camera unit 140 is formed as described above, the irregular reflection phenomenon can be minimized as shown in FIG. 4 (b).

Therefore, the surveillance camera 100 prevents the light reflected by the line shield 150 from being incident on the camera unit 140 during the operation of the infrared illumination unit 130, thereby preventing irregular reflection and obtaining a clear image.

Although the present invention has been described in connection with the above-mentioned preferred embodiments, it is possible to make various modifications and variations without departing from the spirit and scope of the invention. Accordingly, it is intended that the appended claims cover all such modifications and variations as fall within the true spirit of the invention.

100: Surveillance camera
110: Housing
120: Window
130: Infrared illuminator
140: Camera unit
141:
142: Image sensor
150: Sunshield
160: blocking member
170: illuminance sensor
180: circuit board

Claims (5)

housing;
A window provided on a front surface of the housing;
An infrared illumination unit installed on a front surface of the housing around the window;
A camera unit installed inside the housing and disposed on a rear surface of the window;
A line shield connected to the housing to block light incident on the window; And
Wherein a certain area of the window is opened and the other part of the window is formed of an opaque material so that light reflected by the line shield is emitted to the camera unit And a shielding member for shielding the incident light from being incident. The method according to claim 1,
Wherein the camera unit includes an image sensor for sensing an image through light incident through the window,
Wherein the shape of the blocking member corresponds to the shape of the image sensor. The method according to claim 1,
Wherein the camera unit includes a lens unit for refracting light incident through the window,
Wherein the lens unit and the window are installed in the housing such that they are not parallel to each other. The method of claim 3,
Wherein a distance from the window to the lens unit is formed such that an upper portion of the lens unit is smaller than a lower portion of the lens unit. The method according to claim 1,
Wherein a portion of the blocking member that opens a certain region of the window is formed in a rectangular shape.

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