KR101480403B1 - Fixing structure for auxiliary light of photographing apparatus - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an auxiliary light source fixing structure of an image pickup apparatus, and more particularly to an auxiliary light source fixing structure of an image pickup apparatus which can easily adjust an optical axis of an auxiliary light source.

The present invention relates to a light source device, An auxiliary light source holder for receiving the auxiliary light source; And at least one position adjusting member formed to be capable of being drawn in and out of the auxiliary light source holder.

Description

[0001] The present invention relates to an auxiliary light source fixing structure for an imaging device,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an auxiliary light source fixing structure of an image pickup apparatus, and more particularly to an auxiliary light source fixing structure of an image pickup apparatus which can easily adjust an optical axis of an auxiliary light source.

In a digital camera, which is one of the digital image processing apparatuses, exposure control of a subject is generally performed by setting the aperture of the diaphragm provided on the lens, the amount of the electronic shutter of the CCD as the imaging element, and the gain of the imaging signal output from the CCD, have. In addition, most digital cameras use auto focus.

Here, the automatic focus is to automatically focus the photographing lens on the subject, and measures the distance to the subject and focuses it. Therefore, when there is not enough contrast in the subject in the dark background, the position of the subject image can not be determined, and focus adjustment can not be performed. Therefore, the automatic focusing is performed when the luminance level of the subject is low and there is not sufficient contrast within the dark background, but at this time, exposure control is performed to increase the gain of the imaging signal.

However, when the luminance level becomes extremely low due to the extremely small amount of ambient light such as a dark place, the brightness level is insufficient even if exposure control for increasing the gain of the image pickup signal is performed, so that the accuracy of automatic focusing may not be enhanced. Therefore, in recent digital cameras, an AF assist light source is irradiated on a subject in order to assist the lack of the brightness level.

In detail, when photographing is performed with the AF camera, sufficient contrast is required for the subject in order to focus the image at the time of photographing. In contrast, when the contrast is not sufficient, the focus can be adjusted by increasing the brightness level. In other words, at the time of auto-focusing, exposure control for increasing the gain of the image pickup signal may be performed as compared with monitoring. By doing so, in a situation in which a sufficient contrast can not be obtained due to a lack of brightness level, an AF assist light source such as an LED is irradiated to the subject, thereby adjusting the focus level by raising the brightness level of the subject. In the camera provided with the auxiliary light source device that emits the AF auxiliary light source, when the focus is determined, the auxiliary light source is controlled to emit light when it is determined that the amount of light in the place where the subject is present is low.

In such a digital camera, the auxiliary light source device that emits the AF auxiliary light source is embedded in the camera body, or embedded in a flash device for illuminating the subject in a dark environment or under backlit conditions for proper exposure And is mounted on the camera body as required.

Here, as a conventional method of incorporating the AF auxiliary light source into the camera body, a method of fixing the auxiliary light source by coupling a separate auxiliary light source holder to the cover of the camera, or by coupling the auxiliary light source to a separate PCB, A method of coupling the auxiliary light source to the holder, coupling the auxiliary light source to the base holder and coupling the auxiliary light source holder to the upper side, and the like have been used.

However, in such a conventional auxiliary light source fixture, there is a problem that the auxiliary light source is deflected to one side or the optical axis of the auxiliary light source can be deflected by the assembly tolerance. In addition, when the optical axis of the auxiliary light source is deflected, it is not easy to control the optical axis.

In addition, when the optical axis of the auxiliary light source is deflected, a method of correcting the optical axis of the auxiliary light source by adding a rib to the auxiliary light source holder to correct it is used. However, in order to add ribs to the auxiliary light source holder, there is a problem that the product development period and product development cost increase because the tendency of how much the optical axis of the produced auxiliary light source is deflected in which direction has to be known in advance. Further, since the position of the ribs is fixed, when a problem occurs in the production process of the product, that is, when the tendency of the optical axis deflection changes in the production process of the product, it is necessary to re-manufacture the mold and increase the time and cost for solving the problem There was a problem.

It is an object of the present invention to provide an auxiliary light source fixing structure of an image pickup apparatus which can easily adjust an optical axis of an auxiliary light source.

The present invention relates to a light source device, An auxiliary light source holder for receiving the auxiliary light source; And at least one position adjusting member formed to be capable of being drawn in and out of the auxiliary light source holder.

In the present invention, the optical axis of the auxiliary light source can be adjusted by pulling in and out of the position adjusting member.

In the present invention, the optical axis of the auxiliary light source can be adjusted by the degree that the position adjusting member presses the auxiliary light source.

In the present invention, the auxiliary light source holder may be formed with a guide groove, and the position adjustment member may be formed to be inserted into the guide groove, and the position adjustment member may be formed to be capable of being drawn in and out of the auxiliary light source holder .

Here, as the position adjusting member is drawn along the guide groove, the optical axis of the auxiliary light source can be adjusted by the position adjusting member pressing the auxiliary light source.

In addition, the position adjusting member may have a protrusion formed on the side of the auxiliary light source. When the position adjusting member is drawn into the auxiliary light source holder, the protrusion and the auxiliary light source may be in contact with each other.

Here, the protrusion may be formed to have a predetermined curvature.

In the present invention, the auxiliary light source holder may have a through hole, and the position adjustment member may be inserted through the auxiliary light source holder through the through hole.

Here, the optical axis of the auxiliary light source can be adjusted by the position adjusting member pressing the auxiliary light source as the position adjusting member is drawn through the through hole.

In addition, the position adjusting member may be formed with a male screw, and an inner circumferential surface of the through hole may be formed with a female screw having a shape that engages with the male screw of the position adjusting member.

According to the present invention, the optical axis of the auxiliary light source can be easily adjusted.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a perspective view showing a front and an upper outline of a digital camera of a digital image processing apparatus, and FIG. 2 is a schematic view showing an internal structure of the imaging apparatus of FIG.

1 and 2, the image pickup apparatus includes a shutter 111, a flash 113, an auxiliary light source 120, a viewfinder 115, a lens portion 117, and a printed circuit board 119.

In a digital image processing apparatus such as a camera, the shutter 111 is divided into a two-stage structure, that is, a half shutter and a full shutter. Half-shutter is a preliminary step that allows the camera to focus and adjust the amount of light. Thereafter, when the full shutter is pressed, the subject is photographed by the predetermined focus and the amount of adjusted light.

The flash 113 uses a discharge tube such as a xenon lamp to emit a strong flash of light and emit light to the subject in order to compensate for the insufficient amount of light in a low illumination environment such as a night or a dark place give.

The AF (Auto Focus) function does not work because the amount of light reflected to the subject is extremely small at low light levels or at night. In this case, the auxiliary light source 120 is employed in the camera. It is often seen in the camera that red light is emitted in a place where light is insufficient or at night, which is the auxiliary light source 120. The auxiliary light source 120 is literally considered as a light for assisting autofocus. In other words, even when there is insufficient light, the camera automatically shoots light to the subject so that it can focus quickly and accurately.

An optical system (OPS) including a lens portion 117 and a filter portion (not shown) optically processes light from a subject. The lens portion 117 of the optical system OPS includes a zoom lens ZL, a focus lens FL, and a compensation lens CL.

(Embodiment 1)

4 is an enlarged perspective view of the auxiliary light source fixing structure of the image pickup apparatus of FIG. 3, and FIG. 5 is a sectional view of the auxiliary light source fixing structure of the image pickup apparatus according to the first embodiment of the present invention, -V. ≪ / RTI >

In the case of the conventional auxiliary light source fixture, there is a problem that the auxiliary light source is deflected to one side or the optical axis of the auxiliary light source can be deflected by the assembly tolerance. In addition, when the optical axis of the auxiliary light source is deflected, it is not easy to control the optical axis. On the other hand, when the optical axis of the auxiliary light source is deflected, a method of correcting the optical axis of the auxiliary light source is used by adding a rib to the auxiliary light source holder to correct it. However, in order to add ribs to the auxiliary light source holder, there is a problem that the product development period and product development cost increase because the tendency of how much the optical axis of the produced auxiliary light source is deflected in which direction has to be known in advance. Further, since the position of the ribs is fixed, when a problem occurs in the production process of the product, that is, when the tendency of the optical axis deflection changes in the production process of the product, it is necessary to re-manufacture the mold and increase the time and cost for solving the problem There was a problem.

In order to solve such a problem, the present invention is characterized in that at least one position adjustment member capable of being drawn in and out is provided to the auxiliary light source holder, and the optical axis of the auxiliary light source is easily adjusted.

3, an auxiliary light source structure 100 of an image pickup apparatus according to an embodiment of the present invention includes an auxiliary light source 120, an auxiliary light source holder 130, a position adjusting member 140, (150).

The printed circuit board 150 forms a base portion of the image pickup apparatus, and various components necessary for starting the image pickup apparatus such as an image pickup element (not shown) and an auxiliary light source 120 are placed thereon.

The auxiliary light source holder 130 is coupled to the printed circuit board 150 at the back of the printed circuit board 150 and is fastened to the printed circuit board 150 by fastening members such as bolts.

The auxiliary light source 120 is fitted to the auxiliary light source holder 130 at the back surface of the auxiliary light source holder 130. [ A conductor (not shown) extending from the auxiliary light source 120 is coupled to the printed circuit board 150 by soldering or the like.

Referring to FIGS. 4 and 5, at least one guide groove 131 is formed on the inner circumferential surface of the auxiliary light source holder 130. The guide groove 131 is formed in a substantially 'T' shape in which the position adjusting member 140 is fitted.

The position adjusting member 140 is formed to have a shape that meets with the guide groove 131 so as to be fitted into the guide groove 131, that is, an approximately 'I' shape. The position adjusting member 140 can be inserted into and drawn out of the auxiliary light source holder 130 along the guide groove 131 by the shape that is engaged with each other.

4 and 5, the guide groove 131 is formed in a substantially 'T' shape and the position adjusting member 140 is formed in an approximately 'I' shape, but the spirit of the present invention is not limited thereto And the position adjusting member 140 may be inserted into or drawn out from the auxiliary light source holder 130 through the guide groove 131. [

A protrusion 141 having a predetermined curvature may be further formed on one side of the position adjusting member 140, specifically, on the side facing the auxiliary light source 120 accommodated in the auxiliary light source holder 130. The protrusion 141 may protrude from the one side of the position adjusting member 140 in a substantially hemispherical shape.

The auxiliary light source 120 is generally formed in a hemispherical shape. Accordingly, as the position adjusting member 140 is drawn into the auxiliary light source holder 130 along the guide groove 131, the projection 141 of the position adjusting member 140 pushes the auxiliary light source 120, (120) is slightly adjusted in a direction opposite to the direction in which the protrusion (141) is pressed. On the other hand, as the position adjusting member 140 is pulled out from the auxiliary light source holder 130 along the guide groove 131, the projection 141 of the position adjusting member 140 presses the auxiliary light source 120 less, The position of the light source 120 is adjusted little by little in the direction of the projection 141. That is, the optical axis of the auxiliary light source 120 is adjusted by the degree of the position adjusting member 140 pressing the auxiliary light source 120.

Here, since the protruding portion 141 is formed in a substantially hemispherical shape, the auxiliary light source 120 and the protruding portion 141 are in point contact rather than in surface contact, so that the position of the auxiliary light source 120 The effect of being easily controlled can be obtained.

Although FIGS. 4 and 5 illustrate that the guide groove 131 and the position adjusting member 140 are formed one by one, the present invention is not limited thereto. That is, a plurality of guide grooves 131 and position adjusting members 140 are formed to control the movement of the respective position adjusting members 140 according to the degree of deflection of the optical axis of the auxiliary light source 120, The optical axis of the light source 120 can be adjusted. A plurality of guide grooves 131 may be formed and only one position adjusting member 140 may be provided to adjust the optical axis of the auxiliary light source 120 by adjusting the position of the position adjusting member 140 .

According to the present invention, the optical axis of the auxiliary light source can be easily adjusted.

(Second Embodiment)

FIG. 6 is a perspective view showing an auxiliary light source fixing structure of an image pickup apparatus according to a second embodiment of the present invention, and FIG. 7 is a sectional view of FIG. 6 through VI-VI.

6 and 7, an auxiliary light source structure 200 of an imaging apparatus according to another embodiment of the present invention includes an auxiliary light source 220, an auxiliary light source holder 230, a position adjusting member 240, And a printed circuit board (250).

The printed circuit board 250 constitutes the base of the image sensing device, and various components necessary for starting the image sensing device such as an image sensing device (not shown, auxiliary light source 220)

The auxiliary light source holder 230 is coupled to the printed circuit board 250 at the back of the printed circuit board 250 and is fastened to the printed circuit board 250 by fastening members such as bolts.

The auxiliary light source 220 is fitted into the auxiliary light source holder 230 at the back surface of the auxiliary light source holder 230. A conductor (not shown) extending from the auxiliary light source 220 is coupled to the printed circuit board 250 by soldering or the like.

At least one through hole 231 is formed in the side surface of the auxiliary light source holder 230. A female screw may be formed on the inner peripheral surface of the through hole 231.

A male screw having a shape to be engaged with a female screw formed on the inner circumferential surface of the through hole 231 may be formed on the outer circumferential surface of the position adjusting member 240 so as to be inserted into the through hole 231. The through hole 231 and the position adjusting member 240 are formed with the female screw and the male screw so that the position adjusting member 240 is inserted into the auxiliary light source holder 230 along the through hole 231, And withdraw.

6 and 7 show that the position adjusting member 240 is formed in the auxiliary light source holder 230 along the through hole 231 by forming the female screw and the male screw in a shape to be engaged with the through hole 231 and the position adjusting member 240, But the present invention is not limited thereto. In other words, the position adjusting member 240 may be made of an elastic material so that the position adjusting member 240 can be prevented from being inserted into the through hole 231, You can do it.

The auxiliary light source 220 is generally formed in a hemispherical shape. Accordingly, as the position adjusting member 240 is inserted into the auxiliary light source holder 230 along the through hole 231, the position adjusting member 240 presses the auxiliary light source 220, Its position is adjusted little by little in the direction opposite to the direction in which the adjusting member 240 is pressed. On the other hand, as the position adjusting member 240 is drawn out from the auxiliary light source holder 230 along the through hole 231, the position adjusting member 240 presses the auxiliary light source 220 less and the auxiliary light source 220 Its position is adjusted little by little in the direction of the position adjusting member 240. That is, the optical axis of the auxiliary light source 220 is adjusted by the degree that the position adjusting member 240 presses the auxiliary light source 220.

6 and 7 illustrate that the through hole 231 and the position adjusting member 240 are formed one by one, but the spirit of the present invention is not limited thereto. That is, a plurality of through holes 231 and a plurality of position adjustment members 240 are formed to control the insertion and extraction of the position adjustment members 240 according to the degree of deflection of the optical axis of the auxiliary light source 220, The optical axis of the light source 220 can be adjusted. A plurality of through holes 231 may be formed and only one position adjusting member 240 may be provided to adjust the optical axis of the auxiliary light source 220 by controlling the position of the position adjusting member 240 .

According to the present invention, the optical axis of the auxiliary light source can be easily adjusted.

The present invention has been described with reference to the preferred embodiments. It will be understood by those skilled 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. Therefore, the disclosed embodiments should be considered in an illustrative rather than a restrictive sense. The scope of the present invention is defined by the appended claims rather than by the foregoing description, and all differences within the scope of equivalents thereof should be construed as being included in the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic front view showing an appearance of an image pickup apparatus. Fig.

2 is a schematic view showing the internal structure of the imaging device of FIG.

3 is a perspective view showing an auxiliary light source fixing structure of an image pickup apparatus according to an embodiment of the present invention.

4 is an enlarged perspective view of the auxiliary light source fixing structure of the image pickup apparatus of FIG.

5 is a cross-sectional view taken along line V-V in Fig.

6 is a perspective view showing an auxiliary light source fixing structure of an image pickup apparatus according to another embodiment of the present invention.

7 is a cross-sectional view of VI-VI of Fig.

Description of the Related Art

100, 200: auxiliary light source fixing structure of the image pickup apparatus

120, 220: auxiliary light source

130, 230: auxiliary light source holder

140, 240:

Claims (10)

Auxiliary light source; An auxiliary light source holder for receiving the auxiliary light source; And And at least one position adjusting member formed to be capable of being drawn in and out of the auxiliary light source holder Wherein the optical axis of the auxiliary light source is adjusted according to a degree of the pressing of the auxiliary light source by the position adjusting member by the pulling-out and pulling of the position adjusting member. delete delete The method according to claim 1, Wherein the auxiliary light source holder is formed with a guide groove and the position adjusting member is formed to be inserted into the guide groove so that the position adjusting member can be drawn in and out of the auxiliary light source holder. rescue. 5. The method of claim 4, Wherein the optical axis of the auxiliary light source is adjusted by the position adjusting member pressing the auxiliary light source as the position adjusting member is drawn along the guide groove. 5. The method of claim 4, Wherein the position adjusting member is formed with a protrusion on the side of the auxiliary light source, and when the position adjusting member is drawn into the auxiliary light source holder, the protrusion and the auxiliary light source come into contact with each other. The method according to claim 6, Wherein the protruding portion is formed to have a predetermined curvature. The method according to claim 1, Wherein the auxiliary light source holder is formed with a through hole and the position adjusting member is inserted through the auxiliary light source holder through the through hole. 9. The method of claim 8, And the optical axis of the auxiliary light source is adjusted by the position adjusting member pressing the auxiliary light source as the position adjusting member is drawn through the through hole. 9. The method of claim 8, Wherein the position adjusting member is formed with a male screw and an inner circumferential surface of the through hole is formed with a female screw having a shape to be engaged with the male screw of the position adjusting member.

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