KR20160031173A - Lighting device and method for camera - Google Patents

Abstract

The invention relates to a lighting device for a camera, which comprises: a lens unit for photographing a subject; a short distance lighting unit coupled to the lens unit, and lighting a short distance; a long distance lighting unit coupled to the lens unit, and lighting a long distance; a sensing unit for sensing the subject; and a control unit for receiving a sensed signal of the sensing unit, and controlling the short distance lighting unit and the long distance lighting unit based on image information of the lens unit. Accordingly, quality of an image can be improved.

Description

TECHNICAL FIELD [0001] The present invention relates to a lighting device and a lighting method for a camera,

This disclosure relates to a lighting device and a lighting method for a camera, and more particularly, to a lighting device and a lighting method for a camera that actively adjusts illumination of the camera to improve a video signal of the camera.

In general, cameras used to monitor a specific location may require additional illumination to improve the image quality in an environment where the camera is used for monitoring.

This is the case, for example, during night time in an outdoor environment when natural light is insufficient for the camera. In this case, various types of illumination may be used together with the surveillance camera. A general choice is to use light emitting diodes (LEDs) that emit infrared or white light to illuminate the scene being monitored by the surveillance camera. The LEDs may be mounted on an external device, or incorporated into the camera housing or the mechanical structure of the camera.

Conventionally, since the brightness of a light emitting diode that provides illumination to a camera is uniform, the image quality varies depending on the distance between the camera and the monitored object. In order to solve such a problem, techniques for adjusting the illuminance of the illumination lamp according to the presence or absence of the subject and the distance from the subject have been developed. However, since the brightness of the image information captured by the camera can not be adjusted, it is difficult to visually identify the subject through the captured image information. Therefore, there is a need to improve this.

BACKGROUND ART [0002] The background art of the present invention is disclosed in Korean Patent Laid-Open Publication No. 2013-0053170 (published on May 23, 2013, entitled CCTV camera equipped with a variable auxiliary light source).

The present disclosure provides an illumination device and a lighting method for a camera that improves the image quality by varying illumination brightness depending on the distance from the subject.

According to an aspect of the present disclosure, a lighting device for a camera includes: a lens unit for photographing a subject; A lens barrel coupled to the lens barrel and illuminating a close range; An aid list coupled to the lens unit and illuminating a distance; A sensing unit for sensing the subject; And a control unit for receiving the sensing signal of the sensing unit and controlling the contact list and the aid list based on the image information of the lens unit.

According to another aspect of the present disclosure, a lighting device for a camera includes: sensing a subject; Illuminating at least one of a sight list for illuminating a close range and an aid list for illuminating a distant light by comparing a distance between the subject and the lens unit with a reference distance; Photographing a subject of the lens unit; And comparing the brightness of the image information photographed by the lens unit with the reference brightness to adjust the brightness of the sight list and the aid list.

The illumination device for a camera according to the embodiment of the present disclosure can improve the image quality of a subject by selectively illuminating the sight list and the aid list depending on the position of the subject.

The illumination device for a camera according to the embodiment of the present disclosure can improve the image quality by adjusting the brightness of illumination according to the photographed image information.

The illumination device for a camera according to an embodiment of the present disclosure can suppress power consumption when the sensing section is photographed only when a subject is sensed and is used for security purposes.

BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a schematic view of a lighting device for a camera according to an embodiment of the present disclosure; FIG.
2 is a diagram schematically showing a sight list and an aid list in a lighting device for a camera according to an embodiment of the present disclosure;
Fig. 3 is a view schematically showing an illumination state when a subject is located farther than a reference distance in a lighting device for a camera according to an embodiment of the present disclosure; Fig.
4 is a diagram schematically illustrating an illumination state when a subject is located at a reference distance in a lighting device for a camera according to an embodiment of the present disclosure;
5 is a view schematically showing an illumination state when a subject is located closer to a reference distance in a lighting device for a camera according to an embodiment of the present disclosure;
6 is a flow chart schematically illustrating an illumination method for a camera according to an embodiment of the present disclosure;

Hereinafter, an embodiment of a lighting device and a lighting method for a camera according to the present disclosure will be described with reference to the accompanying drawings. In this process, the thicknesses of the lines and the sizes of the components shown in the drawings may be exaggerated for clarity and convenience of explanation. In addition, the terms described below are terms defined in consideration of the functions of the present invention, which may vary depending on the intention or custom of the user, the operator. Therefore, definitions of these terms should be made based on the contents throughout this specification.

BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a schematic view of a lighting device for a camera according to an embodiment of the present disclosure; FIG. 1, a lighting apparatus 1 for a camera according to an embodiment of the present disclosure includes a lens unit 10, a sighting name list 20, an original name list 30, a sensing unit 40, And a control unit 50.

The lens unit 10 photographs the subject 100. In this embodiment, the lens unit 10 includes a housing 11 forming an outer appearance, a lens 12 mounted on the housing 11 for photographing the subject 100, And a storage unit 13 for storing image information taken by the imaging unit 12.

The sight list 20 is coupled to the lens unit 10 and illuminates a close range. The aid list 30 is coupled to the lens unit 10 and illuminates the distance. The sight list 20 and the aid list 30 can be directly coupled to the lens unit 10. [ In addition, since the root directory 20 is directly coupled to the lens unit 10 and the root directory 30 is directly coupled to the root directory 20, the root directory 30 is coupled indirectly to the lens 10 Can be maintained. It is also possible that the aid roster 30 is directly coupled to the lens portion 10 and the roster roster 20 is directly coupled to the aid roster 30 so that the roster roster 30 is indirectly coupled to the lens portion 10 State can be maintained.

The sensing unit 40 senses the subject 100 and the control unit 50 receives the sensing signal of the sensing unit 40. [ The control unit 50 controls the brightness of the sight list unit 20 and the aid list unit 30 based on the image information of the lens unit 10. At this time, the control unit 50 can select and control the root directory 20 and the root directory 30, or control the root directory 20 and the root directory 30 at the same time.

2 is a diagram schematically showing a sight list and an aid list in a lighting device for a camera according to an embodiment of the present disclosure; 1 and 2, a root directory 20 according to one embodiment of the present disclosure includes a root base 21, a root plate 22, and a near-infrared device 23. The original list 30 includes a circle base portion 31, an original plate portion 32 and an original element portion 33. [

The base portion 21 is coupled to the lens portion 10. For example, the housing 11 has a cylindrical shape, and a protrusion 111 of a strip-like shape protrudes outside the housing 11. The base base portion 21 may be formed in a round shape to surround the housing 11 so as to be bolted to the projection 111. [ The distal-end plate portion 22 is mounted on one side of the proximal base portion 21, more specifically, a surface facing the subject 100. [ For example, the near-field plate portion 22 may have a bar shape, and the outer diameter of the near-field plate portion 22 may coincide with the outer diameter of the near- A plurality of near-infrared irradiating portions 23 are arranged along the circumferential surface of the near-infrared irradiating portion 22 to irradiate a near portion. The near-infrared light unit 23 may be a light-emitting diode having a wide emission angle and a low brightness per unit area, and the brightness can be adjusted according to the current control of the near-field plate unit 22. [

The original base portion (31) is coupled to the main base portion (21). For example, the circular base portion 31 may be formed in a round shape to surround the base base portion 21 so as to be bolted to the projection 111. The base plate portion 32 is mounted on one side of the circular base portion 31, more specifically, a surface facing the subject 100. For example, the circumferential plate portion 32 may have the shape of a bar, and the outer diameter of the platen portion 32 may coincide with the outer diameter of the circular base portion 31. A plurality of the light element sections (33) are arranged along the circumferential surface of the plate section (32), and irradiate a long distance. The light emitting element section 33 may be a light emitting diode having a narrow emission angle and a bright brightness per unit area, and the brightness can be adjusted according to the current control of the plate section 32.

On the other hand, in the present embodiment, the root name list 20 is formed inside the root name list 30, but the root name list 30 may be located inside the root name list 20. It is also possible to change various shapes such as a polygonal band including an elliptical band, a triangle, a square, a pentagon, a hexagon, etc. in addition to a band, and the roster 20 and the aid list 30 can be selectively positioned on the upper, lower, left, and right sides of the lens unit 10, respectively. In addition, the near optical element section 23 and the light element section 33 can be regular or irregular periodicities and mixed arrangement thereof.

The sensing unit 40 according to an embodiment of the present disclosure includes a recognition sensor 41 and a distance sensor 42. [ The recognition sensor 41 senses the presence or absence of the subject 100 and transmits a recognition signal to the control unit 50. The distance sensor 42 senses the distance to the subject 100 and transmits a distance signal to the control unit 50 do. For example, the recognition sensor 41 and the distance sensor 42 may be mounted on the near-field plate 22 close to the lens 12. In addition, the recognition sensor 41 and the distance sensor 42 may be mounted on the base plate portion 32 or separately on the near-end plate portion 22 and the base plate portion 32.

FIG. 3 is a view schematically showing an illumination state when a subject is located farther than a reference distance in a lighting device for a camera according to an embodiment of the present disclosure, and FIG. 4 is a view 5 is a schematic view of a lighting device for a camera according to an embodiment of the present disclosure, schematically showing the lighting state when the subject is positioned closer to the reference distance than the reference distance; Fig. FIG.

1 to 5, one or both of the sight list 20 and the aid list 30 may be illuminated according to the distance from the subject 100 sensed by the distance sensor 42. [ 3). When the subject 100 is located at a reference distance, the aid list 30 and the sight list 20 (see FIG. 3) are displayed when the subject 100 is located at a reference distance. 4). When the subject 100 is positioned closer to the reference distance than the reference distance, only the sight roster 20 can be lit (see FIG. 5). The reference distance means a distance at which the lens unit 10 can stably identify the subject 100 even if the eye name list 20 and the aid list 30 are lit at the same time, The reference distance input to the controller 50 may vary depending on the product. The reference distance may be limited by the distance between the distance sensor 42 and the subject 100. In addition, the reference distance may mean an area in which the lens unit 10 can stably identify the subject 100, even if the eye name part 20 and the aid name part 30 are lit at the same time.

6 is a flow chart schematically illustrating an illumination method for a camera according to an embodiment of the present disclosure; 1 to 6, a lighting method for a camera according to an embodiment of the present disclosure is as follows.

First, when the user operates the power switch of the camera lighting device 1 to apply power to the camera lighting device 1, the camera lighting device 1 senses the subject 100 (S10). In the step S10 of sensing the subject 100, the recognition sensor 41 senses the presence or absence of the subject 100 and transmits a recognition signal to the control unit 50. [ If the recognition sensor 41 detects the subject 100, the distance sensor 42 senses the distance to the subject 100 and transmits the distance signal to the control unit 50.

When the subject 100 is detected, the control unit 50 compares the distance between the subject 100 and the lens unit 10 with the reference distance to determine the distance between the sight line 20 illuminating a close range and the aid list 30 illuminating a distance At least one of them is turned on (S20). At this time, the brightness of the illuminating roster 20 or the aid list 30 can be determined according to the distance between the distance sensor 42 and the subject 100.

The distance between the subject 100 and the lens unit 10 can be replaced with a value obtained by detecting the distance between the distance sensor 42 and the subject 100. [ On the other hand, the reference distance means a distance at which the lens unit 10 can stably identify the subject 100 even if the source name list 20 and the source name list 30 are lit at the same time. Since the reference distance may vary depending on the performance of the lens unit 10, the reference distance input to the controller 50 may vary depending on the product. The reference distance may be limited by the distance between the distance sensor 42 and the subject 100. In addition, the reference distance may mean an area in which the lens unit 10 can stably identify the subject 100, even if the eye name part 20 and the aid name part 30 are lit at the same time.

When the distance between the subject 100 and the lens unit 10 is compared with the reference distance to illuminate at least one of the sight roster 20 illuminating the near side and the aid illuminator 30 illuminating the far distance (S20) 10 photographs the subject 100 (S30). The lens unit 10 transmits image information about the photographed subject 100 to the control unit 50. [

When the lens unit 10 photographs the subject 100 at S30, the control unit 50 compares the brightness of the image information photographed by the lens unit 10 with the reference brightness, 30) (S40). The reference brightness may mean the degree of visibility of the subject 100 visually when the image information is displayed. The reference brightness can be either a point or an area. Since the reference brightness may vary between hardware and software, the reference brightness input to the controller 50 may vary depending on the product.

On the other hand, the sight list 10 and the assist list 30 each have a plurality of brightness levels, and at the time of first lighting, light can be illuminated with a brightness corresponding to the brightness in the center level. In addition, the brightness level of the sight list 10 and the aid list 30 can be increased or decreased according to the brightness of the image information.

The step S20 of turning on the root directory 20 and the aid directory 30 according to an embodiment of the present disclosure may include the following steps, and the order among these steps may be changed.

First, the control unit 50 compares the distance between the lens unit 10 and the subject 100 and the reference distance with each other (S201). If the distance between the lens unit 10 and the subject 100 is longer than the reference distance (S211), the control unit 50 recognizes that the subject 100 is farther than the reference distance and lights the aid list unit 30 (S221). If the distance between the lens unit 10 and the subject 100 is equal to the reference distance (S212), the control unit 50 recognizes that the subject 100 is located at the reference distance, 30) (S222). Finally, when the distance between the lens unit 10 and the subject 100 is shorter than the reference distance (S213), the control unit 50 recognizes that the subject 100 is closer to the reference distance than the reference distance, (S223).

The step S40 of adjusting the brightness of the buddy list 20 and the aid list 30 according to an embodiment of the present disclosure may include the following steps, and the order among these steps may be changed.

First, the control unit 50 compares the brightness of the image information photographed by the lens unit 10 with the reference brightness (S401). If the brightness of the image information photographed by the lens unit 10 is brighter than the reference brightness at step S411, the control unit 50 reduces the brightness of at least one of the eye name list 20 and the assist list 30 S421). If the brightness of the image information photographed by the lens unit 10 is equal to the reference brightness (S412), the control unit 50 maintains the brightness of at least one of the eye name list 20 and the aid list 30 ). Finally, if the brightness of the image information photographed by the lens unit 10 is darker than the reference brightness (S413), the control unit 50 increases the brightness of at least one of the eye name list 20 and the aid list 30 S423).

For example, when the brightness of the image information photographed by the lens unit 10 is brighter than the reference brightness, if the image to be displayed is close to white and the brightness of the image information photographed by the lens unit 10 is darker than the reference brightness, The image is close to black.

After the brightness of the source list 20 and the source list 30 is adjusted in step S40, the process returns to step S10 to detect the subject 100 and determines whether or not the subject 100 is photographed And determines whether or not the buddy list 20 and the buddy list 30 are lit according to the distance from the subject 100 to be moved to the buddy list 20 and the brightness of the buddy list 30 according to the image information (S40) may be repeatedly performed.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. I will understand. Accordingly, the true scope of protection of the present invention should be defined by the following claims.

10: lens part 11: housing
12: lens 13: storage body
20: Root list 21: Root base part
22: near-end plate portion 23: near optical portion
30: aid list 31: original base part
32: Platen panel part 33: Light element part
40: sensing unit 41: recognition sensor
42: distance sensor 50:

Claims (9)

A lens unit for photographing a subject;
A glossary list and an aid list that illuminate the light;
A sensing unit for sensing the subject; And
And a control unit for controlling the contact list and the aid list based on the sensing signal of the sensing unit and the image information captured by the lens unit.
The method according to claim 1,
A muscle base unit coupled to the lens unit;
A root plate part mounted on the root base part; And
And a plurality of near-infrared light portions arranged in the near-field plate portion for irradiating near-field light.
3. The method of claim 2,
A circular base portion coupled to the lens portion;
An original plate portion mounted on the original base portion; And
And a plurality of light element sections arranged at the far-field plate section for irradiating a long distance.
The method according to claim 1,
Wherein the control unit compares the brightness of the image information photographed by the lens unit with the reference brightness to adjust the brightness of the sight list and the aid list.
The apparatus of claim 1, wherein the sensing unit
A recognition sensor detecting the presence of the subject and transmitting a recognition signal to the control unit; And
And a distance sensor for sensing a distance to the subject and transmitting a distance signal to the control unit.
Sensing a subject;
Illuminating at least one of a sight list for illuminating a close range and an aid list for illuminating a distant light by comparing a distance between the subject and the lens unit with a reference distance;
Photographing a subject of the lens unit; And
And comparing the brightness of the image information photographed by the lens unit with the reference brightness to adjust brightness of the sight list and the aid list.
7. The method of claim 6, wherein sensing the subject further comprises:
Sensing a subject by a recognition sensor; And
And sensing a distance from the subject to the distance sensor.
7. The method according to claim 6, wherein the step of illuminating the sight list and the aid list comprises:
Illuminating the aid list if the distance between the lens unit and the subject is longer than the reference distance;
Illuminating the aid list and the sight list if the distance between the lens unit and the subject is equal to the reference distance; And
And illuminating the sight list if the distance between the lens unit and the subject is shorter than the reference distance.
7. The method of claim 6, wherein adjusting the brightness of the kinesthetic list and the aid list comprises:
Reducing the brightness of at least one of the sight list and the aid list if the brightness of the image information photographed by the lens unit is brighter than the reference brightness;
If the brightness of the image information photographed by the lens unit is the same as the reference brightness, maintaining the brightness of at least one of the sight list and the aid list; And
And increasing the brightness of at least one of the sight list and the aid list if the brightness of the image information captured by the lens unit is less than the reference brightness.

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