KR100989903B1 - Lighting apparatus equipped with shielding means for photosensor - Google Patents

Abstract

PURPOSE: A lighting apparatus for a camera equipping a shielding unit for preventing an optical sensor malfunction is provided to prevent failure of a CDS sensor in an infrared ray blocking filter by fixing a holder on a window. CONSTITUTION: A housing includes a window(21) in the front. A light source is built in the housing. The optical sensor is arranged in the housing. The optical sensor senses the illuminance for lighting the light source.

Description

LIGHTING APPARATUS EQUIPPED WITH SHIELDING MEANS FOR PHOTOSENSOR}

The present invention relates to a lighting device for a camera having a shielding means for preventing the optical sensor malfunction,

More specifically, a night camera due to a phenomenon in which the light of the light source is unintentionally irradiated with an illumination sensor such as a CDS sensor, and the light sensor malfunctions even at night, causing the light source to blink repeatedly (so-called 'hunting' phenomenon). The present invention relates to a lighting device for a camera incorporating a shielding means in order to prevent a problem in the photographing function.

Conventional imaging device, in particular the lighting device of the CCTV camera is provided with a light source for night photographing function.

Recently, LEDs, particularly IR LEDs, have become popular as light sources for lighting devices.

In addition, it is common to automatically control the blinking of the lighting device by introducing an optical sensor for detecting the illuminance, in particular a CDS sensor, for automatic ON / OFF of the lighting device.

When the light source is turned on by sensing light sensor for illuminance detection such as CDS sensor at night, when the light of the light source is diffusely reflected through the window provided in front of the housing of the lighting device, the light of the light source is unintentionally irradiated with the light sensor

There was a problem that the so-called hunting (hunting) phenomenon occurs by repeating the ON / OFF, that is, the blinking of the light source, such as the light source is turned off, the light source is turned on again by the detection of the light sensor, that is recognized as a daytime situation.

In addition, in a conventional imaging device, specifically, a CCTV camera, more specifically a CCTV camera having a lighting device employing an IR LED as a light source, an optical sensor, in particular a CDS sensor, has an infrared cut filter (IR) to maintain its function. Cut Filter) is adopted.

In order to introduce such an infrared cut filter into the illumination device of the camera utilizes a separate cylindrical holder,

The holder to which the infrared cut filter is fixed is introduced in such a way as to cover the CDS sensor mounted on the board for the IR LED, which is a light source, without any fixing means.

Therefore, it is costly to manufacture a holder for mounting an infrared cut filter separately, and it is necessary to assemble the infrared cut filter on the holder and then mount it again to the CDS sensor. Is generated.

Furthermore, due to the vulnerability of the CDS sensor (fixed strength is very weak) during the assembly of the camera, the CDS sensor located on the board for the IR LED is mounted with the infrared cut filter mounting holder partially assembled.

The problem of poor quality due to the collision between the unnecessary CDS sensor and the holder with the infrared cut-off filter, and the poor appearance quality due to the damage (scratch) due to the contact between the front window of the lighting device or the camera and the holder frequently occur,

Due to the characteristics of the CDS sensor, when the holder is fastened, the CDS sensor is not fixed in position, but is inclined or biased to one side, thereby causing a problem in the illumination detection function.

On the other hand, a conventional technique for preventing malfunction of the CDS sensor is Vision HiTek Patent No. 0813182 (March 06, 2008) [Camera device].

In order to solve the problem that the light source is turned on even in the daytime because the optical sensor detects the dark surroundings and always recognizes the night because the camera device is mainly installed in a dark place.

By detecting the light incident through the lens unit to detect the amount of light in the area photographed by the lens to install a light sensor inside the lens holder fixing the lens, thereby preventing the malfunction of the lighting unit due to the detection of the light sensor It suggests a technique to prevent it.

However, this technology has a problem in that it is necessary to change the design of the sensitive lens, and the concept of the present invention to prevent a problem in the function of the lighting device is generated by hunting phenomenon caused by the light reflection by the window of the lighting device at night To be different.

Accordingly, the present invention is a diffuse reflection phenomenon through a window coupled to the front of the housing of the lighting device, the light of the light source is unintentionally irradiated with the light sensor for illuminance detection such as the CDS sensor, and the light sensor malfunctions at night, causing the light source to blink repeatedly. It is an object of the present invention to provide a lighting device for a camera incorporating a shielding means in order to prevent a problem in the night camera shooting function due to the phenomenon caused by the so-called 'hunting' phenomenon.

In particular, an object of the present invention is to provide a lighting device for a camera provided with a shield, the window is implemented as a holder coupled to the window, or implemented as an infrared cut filter coupled to the window.

In addition, the present invention forms a through-hole in the window for the infrared cut-off filter forming a shielding means, it is not necessary to introduce the holder for mounting the infrared cut-off filter by processing the through-steps to simplify the assembly process and also to reduce the material cost effect It is an object of the present invention to provide a lighting device for a camera.

Furthermore, an object of the present invention is to provide a camera lighting apparatus that solves the CDS sensor defect problem and the window problem damage caused by the conventional infrared cut filter assembly process by fixing the holder constituting the shielding means to the window.

In addition, an object of the present invention is to provide a camera lighting device that solves the problem that the CDS sensor is not mounted at the correct position due to collision with the CDS sensor in the holder assembly process for introducing the conventional infrared cut filter through a specific shielding means. do.

In order to achieve the above object, a lighting device for a camera having a shielding means for preventing the optical sensor malfunction according to the present invention is

A housing having a window in front;

A light source embedded in the housing;

An optical sensor arranged in the housing and configured to sense illuminance for turning on or off the light source; And

Shielding means provided in the window to prevent the light of the light source from entering the optical sensor through the window of the housing and causing malfunction;

It is made, including.

In addition, in the lighting device for a camera having a shielding means for preventing the optical sensor malfunction according to the present invention

The shielding means is a holder coupled to the window and surrounding the optical sensor,

In addition, the holder extends through the through hole of the window to the front of the window,

In addition, the shielding means is preferably an infrared cut filter coupled to the window.

Accordingly, the present invention is a diffuse reflection phenomenon through a window coupled to the front of the housing of the lighting device, the light of the light source is unintentionally irradiated with the light sensor for illuminance detection such as the CDS sensor, and the light sensor malfunctions at night, causing the light source to blink repeatedly. The problem caused by the phenomenon (so-called 'hunting') caused by the night camera shooting function is solved, and the present invention is provided with the shielding means is provided in the window, implemented as a holder coupled to the window, It is implemented as an infrared cut filter coupled to the, forming a through hole in the window for the infrared cut filter forming a shielding means, the step is processed through the step is not necessary to introduce the holder for mounting the infrared cut filter, simplifying the assembly process Material costs can be reduced, and the holder that forms the shielding means is fixed to the window. It solves the problem of CDS sensor defect and the window damage caused by the conventional infrared cut filter assembly process, and the CDS sensor due to the collision with the CDS sensor during the assembly of the holder for introducing the conventional infrared cut filter through a specific shielding means. This can solve the problem of not mounting the sensor in the correct position.

1 is a schematic exploded perspective view of a lighting device for a camera according to an embodiment of the present invention.
Figure 2 is a schematic exploded perspective view of a lighting device for a camera according to another embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described in detail with reference to the accompanying drawings.

The present invention may be modified in various ways and may have various forms, and thus embodiments (or embodiments) will be described in detail in the text. However, this is not intended to limit the present invention to the specific form disclosed, it should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention.

In each of the drawings, the same reference numerals, in particular, the tens and ones digits, or the same digits, tens, ones, and alphabets refer to members having the same or similar functions, and unless otherwise specified, each member in the figures The member referred to by the reference numeral may be regarded as a member conforming to these criteria.

In addition, in the drawings, the components are exaggerated in size (or thickness), in size (or thickness), in size (or thickness), or in a simplified form or simplified in view of convenience of understanding. It should not be.

The terminology used herein is for the purpose of describing particular embodiments (suns, aspects, and embodiments) (or embodiments) only and is not intended to be limiting of the invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this application, the terms “comprises” or “consists” are intended to indicate that there is a feature, number, step, action, component, part, or combination thereof described on the specification, but one or more other features. It is to be understood that the present invention does not exclude the possibility of the presence or the addition of numbers, steps, operations, components, parts, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art. Terms such as those defined in the commonly used dictionaries should be construed as having meanings consistent with the meanings in the context of the related art and shall not be construed in ideal or excessively formal meanings unless expressly defined in this application. Do not.

In describing the camera lighting apparatus L according to the present invention, for the sake of convenience, a non-strict approximate direction reference is specified with reference to FIGS. 1 and 2.

The side provided with the window 21 is determined to the front, and the opposite side to the rear.

First, as shown in FIG. 1, the illumination device L for a camera according to the present invention includes a housing 20 having a window 21 in front, a light source 10 arranged in the housing, and an optical sensor ( 30), and the shielding means (S) provided in the window to prevent the light from the light source is introduced into the optical sensor through the window of the housing causing a malfunction.

The center of the housing 10 is provided with a camera module including a camera lens unit (L1),

The light source 10 has a small size, light weight, low heat generation, a reflection configuration, a high speed response characteristic, a pulse operable characteristic, and an LED having excellent light output control characteristics by current, in particular, a plurality of IR LEDs are mounted on a PCB.

In the drawing, the camera lens unit L1 and the light source 10 are shown in the housing 20, but the concept of the present invention can also be applied to the auxiliary lighting device L introduced separately from the camera. However, the scope of protection of the present invention should not be construed as being limited to the integrated camera.

The housing 20 in which the light source 10 and the lens part L1 are embedded has the window 21 seated in front of the body 20A, and then the fixing ring 20B is coupled to the body 20A to fix the window. do. The fixing ring 20B is screwed to the body 20A, but the fixing method of the window may be variously modified as necessary.

The optical sensor 30 may employ various types of photosensors, but it may be preferable to employ a CDS sensor which is widely used.

CDS sensor refers to a cadmium sulfide cell, and is a semiconductor photo sensor using a photoconductive effect in which the resistance value decreases when exposed to light. As a photoconductive cell, CdSe (cadmium selenide) or cadmium selenide sulfide is used as a photoconductive cell. (Cd (S.Se)) and the like, and are not generally specified and generally referred to as CDS cells.

When the shielding means S constituting the core of the present invention is diffusely reflected through the window 21 provided in front of the housing 20 (window acts as a constant waveguide), the light of the light source is unintentionally introduced into the optical sensor 30. Is investigated

Even though the light source 10 should be turned on by detecting that it is a night

In order to prevent the occurrence of a so-called hunting phenomenon, in which the light source is turned off and the light source is turned on by the detection of the light sensor, and the light source is turned on again, i.e., the malfunction is generated by repeatedly blinking the light source. It is provided in the window 21.

In the embodiment shown in Figure 1 the shielding means (S) is composed of an infrared cut filter 40 (IR Cut Filter) coupled to the window 21.

Specifications, shapes, and shapes of the infrared cut filter 40 may be variously selected, and a coupling method to the window 21 may also be variously selected.

In the drawing, the through hole 23 is formed at the corresponding position of the optical sensor 30 of the window 21 in order to improve the assemblability and to be suitable for mass production, and the infrared cut filter 40 serving as the shielding means S at the through part. ) Is introduced.

In order to easily match the optical sensor 30 and the through-hole 23 during assembly, a groove is formed at a specific position of the window, a protrusion is formed in the housing, and the PCB on which the optical sensor 30 is mounted has Forming a groove to be coupled to a specific location can help to improve productivity, and can be improved in assembling in a variety of other ways.

On the other hand, the through hole 23 of the window 21 has a step portion 25, by coupling the infrared cut filter 40 to the wide width portion (廣 幅 部) inside the window to improve the assemblability,

The method of fixing the infrared cut filter 40 to the window may be variously selected such as interference fit, adhesive use, screwing, etc., and a packing member may be separately introduced for waterproofing if necessary.

In addition, a shielding layer 41 is further provided on the stepped portion 25 of the window 21 to block sources of light of the light source 10 from being diffusely reflected along the window 21 and irradiated to the optical sensor 30. It is preferred to be introduced.

The shielding layer 41 is implemented through various methods such as printing layer formation, film attachment, and separate ring bonding, and the wide portion of the through hole 23 is illustrated in the upper enlarged circle of FIG. In the form of introducing the shielding layer 41 into the back portion,

It can also be introduced into the narrow section (possible to be introduced only in the narrow section or in the wide section and the narrow section),

According to other needs, the shielding layer may be formed at a specific portion and a specific region of the through hole 23.

Next, another form of shielding means S is shown in FIG. 2.

The shielding means (S) shown is a modification of the holder for fixing the existing infrared cut filter,

The holder 50 forming the shielding means S is basically coupled to the window 21 and surrounds the optical sensor.

The fixing method of the holder 50 to the window 21 may be variously selected.

In the cross-sectional view (left) in the upper enlarged circle of FIGS. 2 and 2, the holder 50 body 51 is inserted into a through hole formed at a corresponding position of the optical sensor 30 of the window 21 and the main body exposed to the front surface of the window ( 51) The fixing body 53 may be coupled to the front end portion.

In particular, in the figure, the holder 50, in particular the holder body 51 is a structure that extends to the front of the window through the through hole of the window 21, as if the shielding layer 41 in the shielding means (S) of FIG. It has a high spirits that can play the same role.

The method of fixing the main body 51 to the window 21 may be variously selected, and the method of coupling the main body and the fixed body may be variously selected.

Furthermore, a separate translucent protective cover 55 is seated in the hollow of the main body 51 and fixed by the fixing body 53 in a cross-sectional view in the upper left enlarged circle of FIG. 2 to provide waterproofness and foreign matter intrusion prevention function. Compared to being

In the cross-sectional view in the upper right enlarged circle of Figure 2 the bar is omitted,

This means that the protective cover is employed as needed.

Furthermore, the transparent protective cover may serve as a function of an infrared cut filter.

On the other hand, the rear end of the holder 50, the main body 51 may surround the optical sensor 30, and may have a length that extends to the front surface of the PCB.

In the above description, a conventional publicly known technique related to an optical sensor, a CDS sensor, a camera type and structure, a structure and a shape of an illumination device, a specification of a light source, a detailed description of an infrared cut filter, and the like are omitted, but those skilled in the art can easily assume this. And infer and reproduce.

In addition, in the above description of the present invention with reference to the accompanying drawings with reference to the accompanying drawings having a specific shape and structure, the present invention can be variously modified, changed and replaced by those skilled in the art, such modifications, changes and substitutions It should be interpreted as falling within the protection scope of the present invention.

L: Lighting device S: Shielding means
10: light source 20: housing
21: Windows 23: through hole
25: stepped portion 30: optical sensor
40: infrared cut filter 41: shielding layer
50: holder 53: fixed body

Claims (4)

A housing having a window in front;
A light source embedded in the housing;
An optical sensor arranged in the housing and configured to sense illuminance for turning on or off the light source; And
Shielding means provided in the window to prevent the light of the light source from entering the optical sensor through the window of the housing and causing malfunction;
Including but not limited to,

The shielding means is coupled to the window and the illumination device for a camera having a shielding means for preventing optical sensor malfunction, characterized in that the holder surrounding the optical sensor. The method of claim 1,
The holder is a lighting device for a camera having a shielding means for preventing the optical sensor malfunction, characterized in that extending to the front of the window through the through hole of the window. The method according to claim 1 or 2,
The holder is coupled to the main body and the front end of the main body and the illumination device for a camera having a shielding means for preventing optical sensor malfunction, characterized in that consisting of a fixed body exposed to the front of the window. The method of claim 3, wherein
The hollow of the main body is a light-transmitting protective cover is mounted to the camera lighting device having a shielding means for preventing malfunction of the optical sensor, characterized in that the fixing by the fixing body.

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