KR100519630B1 - Small camera device for communication machine - Google Patents

Abstract

Disclosed is a small camera apparatus for a communication device, in which a lens having a zoom function is provided in the small communication device.

The camera apparatus includes a lens unit including a first lens group, a second lens group, and a third lens group capable of low magnification and high magnification photographing for each position change, and polarity change depending on a direction selection of an applied current. A magnetic force generating portion for generating a magnetic force, a movable portion for moving the first lens group and the second lens group to the low magnification photographing position and the high magnification photographing position by the magnetic force of the magnetic force generating portion, and the movable portion of the first lens group and the second lens group And a barrel unit for supporting the lens to move in the optical axis direction, and coupled to the third lens group to convert the image of the subject passing through the first lens group, the second lens group, and the third lens group into an electrical signal. It has an image processor.

In such a compact camera apparatus, high magnification photographing is possible by the movement of the first lens group and the second lens group, and therefore, even a long distance subject can be enlarged and photographed clearly.

Description

Mini camera device for communication equipment {SMALL CAMERA DEVICE FOR COMMUNICATION MACHINE}

The present invention relates to a small camera device for a communication device, and in particular, to install a camera having a zoom function in a small communication device such as a mobile phone to shoot a high-distance subject and a near-field subject with a high image quality using a camera for the communication device. It is related with the small camera apparatus for communication apparatuses made possible.

Recently, camera devices have been installed in communication devices such as mobile phones, PDAs, and portable PCs to enable video communication.

As such a camera apparatus, one example conventionally used in FIG. 1 is shown.

The camera device includes a lens assembly 10 and an image sensor 30, and a band-shaped flexible PC 40 is connected to the image sensor 30.

The image sensor 30 converts an image of a subject passing through the lens assembly 10 into an electrical signal and transmits the converted image to an signal processor of a communication device in which a camera device is installed through the flexible PC 40.

However, in such a camera device, the lens assembly 10 is fixedly installed above the image sensor 30. Such a camera device is focused when photographing an object at a specific distance set when the lens assembly 10 is manufactured, but is not in focus when photographing an object of another distance, thereby degrading the quality of the photographed image. In order to solve the problem of the lens fixing method, it is necessary to shift the position of the lens according to the distance of the subject to be in focus.

Also, as in the case of a general film type camera or a digital camera, a zoom function for arbitrarily changing the shooting magnification is an essential function for the camera, but in the case of a mobile phone, it is not an optical zoom method that zooms as a lens. Digital zoom is used through image processing. However, since the digital zoom is performed while degrading the image quality of the captured image, it cannot satisfy the user's preference for the best image quality at any magnification. Therefore, in order to prevent image quality from deteriorating at various magnifications, an optical zoom method should be used. For this purpose, a plurality of lenses should be used, and the distance between the plurality of lenses is linked and changed according to the zoom magnification.

For the above reason, in order to add a zoom function in a small portable camera, the use of a plurality of lens groups and a coordinated movement of the plurality of lens groups are required as in a conventional camera. For the interlocking movement of the plurality of lenses, a general camera or a digital camera adopts a camera device that drives a lens barrel coupled as complicated gears, and thus, its volume is large and its length becomes long in the optical axis direction of the camera. Therefore, such a camera device could not be applied to a small communication device with a space constraint as it is.

The present invention has been made to solve the above problems, an object of the present invention is to install a camera having a zoom function in a small communication device, such as a mobile phone, the short-focus lens of the blind spot of the conventional small communication device camera The purpose of the present invention is to add a problem of deterioration of image quality according to the distance of a subject due to use and a zoom function for completing a function as a camera.

The present invention for achieving the above object, the lens unit including a first lens group, a second lens group and a third lens group capable of low magnification imaging and high magnification imaging for each position change; A magnetic force generator for generating magnetic force whose polarity is changed according to the direction selection of the applied current; A movable unit for moving the first lens group and the second lens group to a low magnification photographing position and a high magnification photographing position by the magnetic force of the magnetic force generating unit; A barrel portion for supporting the movable portion to move the first lens group and the second lens group in an optical axis direction; And an image processor coupled to the third lens group and installed in the barrel unit, and configured to convert an image of an object passing through the first lens group, the second lens group, and the third lens group into an electrical signal. The magnetic force generating unit comprises: a winding coil wound a plurality of times on the outer circumference of the barrel and a second bracket and a third magnetic material that are attached to both sides of the winding coil and become an electromagnet when power is applied to the winding coil. It is made of a bracket, The movable portion, A first frame coupled to the first lens group is movably coupled in the optical axis direction across the inside and the outside of the barrel portion of the second bracket, the first frame is coupled to the first frame And a first permanent magnet which is in contact with the second bracket, and is movably coupled in an optical axis direction over the inside and the outside of the barrel portion of the third bracket. A second frame to which the group is coupled; a second permanent magnet coupled to the second frame and in contact with the third bracket; and the second bracket and the third frame having the first frame and the second frame therebetween. Provided is a compact camera device for a communication device, comprising a first bracket and a fourth bracket made of a magnetic material, each of which is installed on the outer circumference of the barrel at regular intervals from the bracket.

Hereinafter will be described in detail with reference to the accompanying drawings, a camera device for a communication device according to the present invention.

2 is an exploded perspective view of a camera apparatus according to an embodiment of the present invention, FIG. 3 is a perspective view of the coupled state of FIG. 2, and FIG. 4 is a sectional view of the coupled state of FIG. 3. 5 is a cross-sectional view of the state of use of FIG.

The camera device of the present embodiment includes a lens unit including a first lens group 110, a second lens group 120, and a third lens group 130 capable of low magnification and high magnification photographing for each position change; A magnetic force generator for generating magnetic force whose polarity is changed according to the direction selection of the applied current; A movable unit for moving the first lens group 110 and the second lens group 120 to the low magnification photographing position and the high magnification photographing position by the magnetic force of the magnetic generating unit; A mirror part configured to support the movable part to move the first lens group 110 and the second lens group 120 in the optical axis direction; And an image coupled to the third lens group 130 and installed in the barrel, and converting an image of a subject passing through the first lens group 110, the second lens group 120, and the third lens group 130 into an electrical signal. It consists of an image processing unit.

The magnetic force generating part includes a winding coil 300 wound around the outer side of the barrel portion a plurality of times, and a second bracket made of a magnetic material that is attached to both sides of the winding coil 300 and becomes an electromagnet when power is applied to the winding coil 300. 310 and the third bracket 320.

In addition, the movable part includes a first frame 350 and a first frame 350 to which the first lens group 110 is coupled and movably coupled in the optical axis direction across the inside and the outside of the outer barrel portion of the second bracket 310. A second frame 330 coupled to the first permanent magnet 330 coupled to the first permanent magnet 330 and movably in an optical axis direction across the inside and the outside of the outer barrel portion of the third bracket 320, and the second lens group 120 coupled thereto. 360, the second permanent magnet 340 coupled to the second frame 360, the second bracket 310 and the third bracket (3) between the first frame 350 and the second frame 360. It consists of a first bracket 370 and the fourth bracket 380 of a magnetic material provided on the outer periphery of the barrel portion at regular intervals from 320).

A first center hole 352 is formed at the center of the first frame 350 to couple and fix the first lens group 110 by bonding, and a second center hole 362 is formed at the second frame 360. The second lens group 120 is coupled and fixed by bonding.

In addition, a first coupling groove 356 is formed at the edge of the first frame 350 to couple the first permanent magnet 330 and to fix it by bonding, and a second coupling groove 366 is formed at the second frame 360. It forms and bonds the second permanent magnet 340 and fixed by bonding.

The barrel part includes a barrel 210 having a magnetic force generating part fixed thereto and a movable part coupled to the optical axis to be movable, and a base 230 coupled to the barrel 210 and provided with an image processor.

In the barrel 210, in order to guide the first frame 350 and the second frame 360 to move to the low magnification photographing position and the high magnification photographing position, respectively, to the first frame 350 and the second frame 360, respectively. An incision 212 is formed in an optical axis direction so as to be slidably coupled to the first slide groove 354 and the second slide groove 364 to be formed, and at the bottom of the cut portion 212, the fourth bracket 380 is formed. A third guide groove 218 is formed to which the fourth guide protrusion 382 formed in the inner circumference is formed, and the first guide protrusion 372 is formed on the inner circumference of the first bracket 370 on the upper surface of the barrel 210. The first guide groove 214 is coupled to the inner circumference of the second bracket 310 and the third bracket 320 to fix the second bracket 310 and the third bracket 320 in the center area. Second guide grooves 216 are formed to couple the second guide protrusions 312 and the third guide protrusions 322, respectively.

After the second bracket 310 and the third bracket 320 have the second guide protrusion 312 and the third guide protrusion 322 inserted into the second guide groove 216 of the barrel 210, the winding coil 300 ) And fix it together.

In addition, the tube 210 forms a wiring groove 220 to draw the end 302 of the winding coil 300 and connects it to the main body of the communication device.

In the barrel portion, a housing 240 for protecting the magnetic force generating portion and the movable portion is coupled to the base 230.

The image processor is an image sensor 400 for converting an image of a subject passing through the first lens group 110, the second lens group 120, and the third lens group 130 into an electrical signal.

Meanwhile, as shown in FIG. 4, when the first frame 350 fixing the first lens group 110 and the second frame 360 fixing the second lens group 120 are close to the winding coil 300, the first frame 350 is closed. The distance between the lenses is set so that the arrangement of the lens group 110, the second lens group 120, and the third lens group 130 is suitable for low magnification photography, and the first frame 350 and the second frame as shown in FIG. 5. The arrangement of the first lens group 110, the second lens group 120, and the third lens group 130 when the frame 360 is close to the first bracket 370 and the fourth bracket 380 has a high magnification. Set the distance between each lens to suit the shooting.

When the current in one direction is applied to the winding coil 300 to form the magnetic field of the N pole in the second bracket 310, the magnetic field of the S pole is formed in the third bracket 320. Therefore, the first permanent magnet 330 fixed to the first frame 350 is the second permanent magnet 340 fixed to the second frame 360 when the side toward the second bracket 310 to the S pole, Is such that the side facing the third bracket 320 is the N pole. In this way, the first frame 350 and the second frame 360 are gathered or unrolled toward the winding coil 300 side by the current applied to the winding coil 300.

The keypad of the communication device includes an on / off button for driving the image sensor 400 and a low magnification photographing button and a high magnification photographing button for applying power to the winding coil 300 in a forward / reverse direction.

In the camera device of the present embodiment, unlike a general zoom camera which can be freely adjusted using a complicated gear device, the first lens group 110 and the second lens group 120 reciprocate between the low magnification photographing position and the high magnification photographing position. It only has a function. Accordingly, it is possible to reduce the size of the camera device to be applied to small communication devices such as mobile phones. When the camera device is applied to a mobile phone, the camera device is inserted into the hinge cylinder, a hole is formed in the hinge cylinder to open the first lens group 110, and the winding coil 300 and the image sensor 400 are opened. The flexible PC 410 is connected to the signal processor of the main body.

Hereinafter, the operation of the camera device having the above configuration will be described.

The camera device typically maintains a low magnification photographing state as shown in FIG. 4. That is, the power is not applied to the winding coil 300, and the first permanent magnet 330 and the second permanent magnet 340 are in contact with the second bracket 310 and the third bracket 320 by magnetic force.

Therefore, the first frame 350 and the second frame 360 gather the first lens group 110 and the second lens group 120 into the center region to make a low magnification photographing mode.

At this time, if the photographing button is pressed through the keypad installed in the communication device, the image of the subject located in front of the first lens group 110 is the first lens group 110, the second lens group 120 and the third lens group ( 130 is converted into an electrical signal by the image sensor 400 and transmitted to the signal processor in the main body through the flexible PC 410. In this manner, low magnification photographing is performed.

On the other hand, when a user zooms in to photograph a subject at a distance, the user presses a high magnification photograph button on the keypad of the mobile phone. Accordingly, the signal processor applies power to the winding coil 300 through the end 302.

When power is applied to the winding coil 300, magnetic fields having the same polarity as that of the first permanent magnet 330 and the second permanent magnet 340 are formed in the second bracket 310 and the third bracket 320.

Accordingly, as shown in FIG. 5, the first frame 350 and the second frame 360 to which the first permanent magnet 330 and the second permanent magnet 340 are fixed are simultaneously opened to both sides from the center region. Accordingly, the first permanent magnet 330 and the second permanent magnet 340 which are moved to both sides pull the first bracket 370 and the fourth bracket 380 to the first frame 350 and the second frame 360. ) Will be fixed at both ends.

In this state, the arrangement of the first lens group 110, the second lens group 120, and the third lens group 130 is suitable for high magnification imaging. Therefore, the image of the subject incident through the first lens group 110 is enlarged to form the image sensor 400. Therefore, it is possible to enlarge and photograph a subject far from the user.

In this high magnification photographing mode, the first permanent magnet 330 and the second permanent magnet 340 continuously pull the first bracket 370 and the fourth bracket 380, and thus, the first lens group 110 and the first permanent magnet 330. It prevents the flow of the two lens group 120 to maintain a stable state. And it is not necessary to apply any more current to the winding coil 300.

On the other hand, if you want to finish high magnification shooting and shoot low magnification again, press the low magnification shooting button on the keypad of the communication device. Accordingly, the reverse direction power is applied to the winding coil 300, and magnetic fields of opposite polarity to the first permanent magnet 330 and the second permanent magnet 340 are applied to the second bracket 310 and the third bracket 320. Is formed.

Accordingly, as shown in FIG. 4, the first frame 350 and the second frame 360 to which the first permanent magnet 330 and the second permanent magnet 340 are fixed move simultaneously from both sides to the center region. Accordingly, the first permanent magnet 330 and the second permanent magnet 340 moved to the center region are pulled by the second bracket 310 and the third bracket 320 so that the first frame 350 and the second frame ( 360) is fixed in the center area.

In this state, the arrangement of the first lens group 110, the second lens group 120, and the third lens group 130 is suitable for low magnification imaging.

In the low magnification photographing mode, the first permanent magnet 330 and the second permanent magnet 340 continuously pull the second bracket 310 and the third bracket 320, and thus, the first lens group 110 and the second permanent magnet 340. The flow of the lens group 120 is prevented to maintain a stable state. And it is not necessary to apply any more current to the winding coil 300.

As described above, the present invention provides a lens unit including a first lens group 110, a second lens group 120, and a third lens group 130 capable of low magnification and high magnification photographing for each position change. And a low magnification photographing position and a high magnification of the first lens group 110 and the second lens group 120 by the magnetic force generating unit for generating a magnetic force whose polarity is changed according to the direction selection of the applied current. A movable part for moving to the photographing position, a barrel for supporting the movable part to move the first lens group 110 and the second lens group 120 in the optical axis direction, and a barrel part coupled to the third lens group 130 A compact camera apparatus for a communication device, the image processing unit being provided and converting an image of a subject passing through the first lens group 110, the second lens group 120, and the third lens group 130 into an electrical signal. High magnification imaging is performed by the movement of the first lens group 110 and the second lens group 120. Since the termination, there is an effect that can clearly shoot an enlarged view of a distant subject.

In the above, the present invention has been described as an embodiment, but the present invention is not limited to the above-described embodiments, and the present invention is not limited to the above-described claims, and has a general knowledge in the field of the present invention without departing from the gist of the present invention. Anyone who grows up will be able to make various variations.

1 is a perspective view of a camera apparatus for a conventional communication device,

2 is an exploded perspective view of a camera apparatus according to one embodiment of the present invention;

3 is a perspective view of the coupled state of FIG.

4 is a cross-sectional view of the coupling state of FIG.

5 is a cross-sectional view of the state of use of FIG.

<Explanation of symbols for main parts of drawing>

110: first lens group 120: second lens group

130: third lens group 210: first barrel

212: incision 214: first guide groove

216: second guide groove 218: third guide groove

220: wiring groove 230: base

240: housing 300: winding coil

302: end 310: second bracket

312: second guide protrusion 320: third bracket

322: third guide projection 330: the first permanent magnet

340: the second permanent magnet 350: the first frame

352: first hole 354: first slide groove

356: first coupling groove 360: second frame

362: 2nd center hole 364: 2nd slide groove

366: second coupling groove 370: first bracket

372: first guide protrusion 380: fourth bracket

382: fourth guide projection 400: image sensor

410: flexible PC

Claims (5)

A lens unit including a first lens group 110, a second lens group 120, and a third lens group 130 capable of low magnification and high magnification photographing for each position change; A magnetic force generator for generating magnetic force whose polarity is changed according to the direction selection of the applied current; A movable unit for moving the first lens group 110 and the second lens group 120 to a low magnification photographing position and a high magnification photographing position by the magnetic force of the magnetic force generating unit; A barrel part for supporting the movable part to move the first lens group 110 and the second lens group 120 in an optical axis direction; And The image of the subject coupled to the third lens group 130 is installed in the barrel, and passes through the first lens group 110, the second lens group 120, and the third lens group 130. It comprises a; image processing unit for converting into an electrical signal, The magnetic force generating unit, Winding coil 300 wound on the outer periphery of the barrel portion a plurality of times, and the second coil 310 of the magnetic material is attached to both sides of the winding coil 300 becomes a magnet when the power is applied to the winding coil 300 ) And the third bracket 320, The movable part, The first frame 350 and the first frame 350 is coupled to the outside of the second bracket 310 so as to be movable in the optical axis direction over the inside and the outside of the barrel portion and the first lens group 110 is coupled; The first permanent magnet 330 is coupled to the second bracket 310 and in contact with the second bracket 310, the outer side of the third bracket 320 is movably coupled in the optical axis direction over the inside and outside of the barrel portion; A second frame 360 to which the second lens group 120 is coupled, a second permanent magnet 340 coupled to the second frame 360 and in contact with the third bracket 320, and the first frame A first bracket 370 made of a magnetic material, which is installed at an outer circumference of the barrel portion at a predetermined distance from the second bracket 310 and the third bracket 320 with the 350 and the second frame 360 interposed therebetween. And a fourth bracket 380, characterized in that the compact camera device for a communication device. The method according to claim 1, wherein the barrel portion, The magnetic force generating part is fixed and the movable part 210 is coupled to the movable shaft in the direction of the optical axis, and the barrel 210 is coupled to the base 230, the image processing unit is installed, In the barrel 210, A first frame 350 and a second frame 360 formed in the first frame 350 and the second frame 360 to guide the first frame 350 and the second frame 360 to move to a low magnification photographing position and a high magnification photographing position. An incision 212 is formed in an optical axis direction to be slidably coupled to the first slide groove 354 and the second slide groove 364, and an inner circumference of the fourth bracket 380 is formed at the bottom of the cut portion 212. A third guide groove 218 is formed to be coupled to the fourth guide protrusion 382 formed in the first guide protrusion 218 formed on the inner circumference of the first bracket 370 on the upper surface of the barrel 210. A first guide groove 214 to which the 372 is coupled is formed, and the second bracket 310 and the third bracket are fixed to fix the second bracket 310 and the third bracket 320 to a central area. The second guide protrusions 312 and the third guide protrusions 322 respectively formed on the inner circumference of the 320 are respectively. A second guide groove for a small camera unit communication apparatus according to claim 216 is formed to be the sum. The method according to claim 2, wherein the barrel portion, Small camera device for a communication device, characterized in that the housing for protecting the magnetic force generating portion and the movable portion is coupled to the base. The method according to any one of claims 1 to 3, wherein the image processing unit, The communication device, characterized in that the image sensor 400 for converting the image of the subject passing through the first lens group 110, the second lens group 120 and the third lens group 130 into an electrical signal. Compact camera unit. delete