KR100519632B1 - Camera device for communication machine - Google Patents

Abstract

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

The camera device includes a lens unit having a first lens group and a second lens group capable of moving to a general shooting and zoom photographing position and a third lens group fixed in position, and a first lens group and a second lens group moving. And a driving unit controlled by a control unit of a communication device, which drives the barrel to move the general lens and the zoom photographing position to the first lens group and the second lens group so as to support it; And an image processor configured to convert an image of a subject passing through the first lens group, the second lens group, and the third lens group into an electrical signal and transmit the converted image to an electric signal.

Such a camera apparatus enables zoom photographing by the movement of the first lens group and the second lens group, so that it is possible to clearly photograph a distant subject and a near subject.

Description

Camera device for communication device {CAMERA DEVICE FOR COMMUNICATION MACHINE}

The present invention relates to a camera device for a communication device, and in particular, by installing a camera having a zoom function in a small communication device such as a mobile phone, it is possible to photograph a long distance subject and a short distance subject using a camera for a communication device with high image quality. It relates to a camera device for a communication device.

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 the subject passing through the lens assembly 10 into an electrical signal and transmits the converted image to an controller 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 a 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 first lens group and the second lens group and the first lens group and the second lens group that can be moved to the normal shooting and zoom shooting position, the optical axis and the alignment position A lens unit having a third lens group fixed thereto; And a barrel configured to support the first lens group and the second lens group to be movable. The barrel portion through a link portion by a linear movement by a non-magnetic material bobbin, a winding coil wound around the bobbin a plurality of times, and an electromagnetic force generated when a part is located inside the bobbin and power is applied to the winding coil. A drive unit including a drive shaft made of a magnetic material that transmits power to the vehicle; An image processor coupled to the third lens group and installed in the barrel unit, and configured to convert an image of a subject passing through the first lens group, the second lens group, and the third lens group into an electrical signal; And a controller configured to receive the electrical signal from the image processor and to drive the barrel by applying power to the winding coil to move the first lens group and the second lens group to a general photographing and zoom photographing position. Provided is a camera device for a communication device.

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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 driving apparatus shown in FIG. 2.

The camera device of the present embodiment includes a first lens group 110 and a second lens group 120, a first lens group 110 and a second lens group 120, which can be moved to a general shooting and zoom shooting position. A lens unit having a third lens group 130 in which an optical axis is aligned and its position is fixed; And a barrel configured to support the first lens group 110 and the second lens group 120 to be movable. A driving unit which drives the barrel to move the first lens group 110 and the second lens group 120 to a general photographing and zoom photographing position and is controlled by a control unit of a communication device; 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 for transmitting to the control unit.

The barrel may include: a first ring 240 coupled to an outer circumferential surface of the first lens group 110 and having two or more first pins 242 on the outer circumferential surface; A second ring 250 coupled to an outer circumferential surface of the second lens group 120 and having two or more second pins 252 on the outer circumferential surface; Two or more first slide grooves 212 in which the first pin 242 is slidably coupled in the optical axis direction are formed, and two or more second slide grooves in which the second pin 252 is slidably coupled in the optical axis direction ( A first barrel 210 in which 214 is formed; And a first pin 242 rotatably coupled to the outer circumference of the first barrel 210 to receive the power of the driving unit, and slidably coupled to the first pin 242 passing through the first slide groove 212. A first inclined groove 222 is formed to reciprocate the 110 to the normal photographing position and the zoom photographing position, and the second pin 252 passing through the second slide groove 214 is slidably coupled to the first inclined groove 222. The second lens unit 120 includes a second barrel 220 having a second inclined groove 224 for reciprocating the lens group 120 to a general photographing position and a zoom photographing position.

At least one first guide hole 244 is formed on the outer circumferential surface of the first ring 240, and at least one second guide hole 254 is formed on the outer circumferential surface of the second ring 250. A guide shaft 260 is slidably coupled to the first guide hole 244 and the second guide hole 254 to serve as a guide when the first lens group 110 and the second lens group 120 move. .

A first support hole 228 is formed to which the upper end of the guide shaft 260 is coupled, and a cover 226 having an open center is coupled to the upper end of the first barrel 210. In addition, the second support hole 216 is coupled to the lower end of the guide shaft 260 is formed on the inner bottom surface of the first barrel (210).

The drive unit, a bobbin 310 of a nonmagnetic material; A winding coil 320 wound around the bobbin 310 a plurality of times and receiving power from a battery from a control unit of a communication device; And a portion of the drive shaft 330 of a magnetic material positioned inside the bobbin 310 and linearly moving by an electromagnetic force generated when power is applied to the winding coil 320 to transmit power to the barrel through the link unit 332. )

The outer circumferential surface of the second barrel 220 is provided with a lever 230 formed with a long hole 232 toward the center of the second barrel 220, the link portion 332 is coupled to the long hole 232, the second barrel Reciprocating in the normal direction with respect to the outer peripheral surface of (220).

The drive unit includes a housing 340 which covers the drive shaft 330 and the winding coil 320 and has an opening 342 through which the link unit 332 passes.

The drive unit is provided with a compression spring 350 for holding the drive shaft 330 in one direction, and a permanent magnet 360 for pulling the drive shaft 330 in the other direction. The drive shaft 330 is provided with a flange 334 in the site receiving the elasticity of the compression spring (350). And the force that the permanent magnet 360 pulls the drive shaft 330 is greater than the force that the compression spring 350 pushes the drive shaft 330. Therefore, the drive shaft 330 may maintain the state in contact with the permanent magnet 360 to overcome the elasticity of the compression spring 350.

The image processor is an image sensor 410 that converts 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.

The controller applies power to the winding coil 320 only when the drive shaft 330 is separated from the permanent magnet 360 and when the drive shaft 330 moves from the opposite side of the permanent magnet 360 to the permanent magnet 360. Thereby artificially moving the drive shaft 330. The control unit then accesses the image sensor 410 through the flexible PC 412 to obtain image information of the subject.

To this end, the keypad of the communication device includes an on / off button for driving the image sensor 410, and a general shooting button and a zoom shooting button for applying power to the winding coil 320 in a forward / reverse direction.

In the camera device of the present embodiment, unlike a general zoom camera that can be freely adjusted using a complicated gear device, the first lens group 110 and the second lens group 120 reciprocate between the general shooting position and the zoom shooting 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, a camera device is inserted into the hinge cylinder, a hole is formed in the hinge cylinder, the first lens group 110 is opened, and the winding coil 320 and the image sensor 410 are opened. The flexible PC 412 is connected to the control unit of the mobile phone.

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

The camera device typically maintains a state in which general photography is possible. That is, no power is applied to the winding coil 320, and the driving shaft 330 overcomes the elasticity of the compression spring 350 by the attraction of the permanent magnet 360, and one end of the driving shaft 330 is connected to the permanent magnet 360. Keep in contact.

The first inclined groove 222 of the second barrel 220 fixes the first pin 242 of the first ring 240 coupled to the first lens group 110 to a general photographing position, and the second inclined groove 222. The groove 224 fixes the second pin 252 of the second ring 250 coupled to the second lens group 120 at a general photographing position.

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 general shooting.

When 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 displayed by the first lens group 110, the second lens group 120, and the third lens group 130. The signal is converted into an electrical signal by the image sensor 410 and transmitted to the controller in the main body through the flexible PC 412.

On the other hand, when the user wants to photograph the subject at a distance, the user presses the zoom shooting button on the keypad of the mobile phone. Accordingly, the control unit applies power to the winding coil 320 through the flexible PC 412.

When power is applied to the winding coil 320, a magnetic field is formed in the bobbin 310, and the driving shaft 330, which is a magnetic body exposed to the magnetic field, is separated from the permanent magnet 360 to push the compression spring 350. The drive shaft 330 along with the elasticity is moved in the opposite direction of the permanent magnet 360.

When the driving shaft 330 moves, the link portion 332 formed on the driving shaft 330 also moves, and the link portion 332 moves the lever 230 formed on the second barrel 220. Even if the link portion 332 moves in the normal direction with respect to the second barrel 220, the link portion 332 is coupled to the long hole 232 of the lever 230, so that the lever 230 is connected to the link portion 332. The linear motion is converted into the rotational motion of the second barrel 220.

When the second barrel 220 rotates, the first inclined groove 222 and the second inclined groove 224 formed in the second barrel 220 move the first pin 242 and the second pin 252 in the optical axis direction. Will be moved to. Since the first pin 242 and the second pin 252 are also coupled to the first slide groove 212 and the second slide groove 214 of the first barrel 210, they are not rotated and move in the optical axis direction. .

Accordingly, the first pin 242 and the second pin 252 move in the optical axis direction along the shapes of the first inclined groove 222 and the second inclined groove 224 so that the first lens group 110 and the second lens can be moved. Move the group 120 to the zoom shooting position. At this time, the guide shaft 260 is coupled to the first guide hole 244 and the second guide hole 254 to prevent the inclination by acting as a guide when the first lens group 110 and the second lens group 120 is moved. .

As described above, when the first lens group 110 and the second lens group 120 move to the zoom photographing position, the image of the subject incident through the first lens group 110 is enlarged to form the image sensor 410. . Therefore, it is possible to enlarge and photograph a subject far from the user.

In the zoom photographing mode, the compression spring 350 closes the driving shaft 330 to one side to prevent the flow from occurring in the driving shaft 330. Accordingly, the second barrel 220, the first pin 242, the second pin 252, the first lens group 110, and the second lens group 120 maintain a stable state at the zoom photographing position.

In addition, since the zoom photographing position is far from the end of the drive shaft 330 and the permanent magnet 360, the attraction force of the permanent magnet 360 does not act or is insignificant on the drive shaft 330. It becomes possible to fix the position of 330. Therefore, it is not necessary to apply any more current to the winding coil 320.

On the other hand, to end the zoom shooting and normal shooting again, press the normal shooting button on the keypad of the communication device. Accordingly, the reverse direction power is applied to the winding coil 320, and the reverse magnetic field is formed inside the bobbin 310.

Accordingly, the drive shaft 330 overcomes the elasticity of the compression spring 350 and moves the drive shaft 330 toward the permanent magnet 360. When the end of the drive shaft 330 is attached to the permanent magnet 360, the permanent magnet 360 prevents the flow of the drive shaft 330 only by the force to pull the drive shaft 330, so that the power to the winding coil 320 is no longer applied You do not have to do.

The state in which the drive shaft 330 is moved is the general photographing position described above.

As described above, the present invention provides a lens unit including a first lens group 110 and a second lens group 120 and a third lens group 130 having a fixed position. And a barrel part for supporting the first lens group 110 and the second lens group 120 to be movable, and the first lens group 110 and the second lens group 120 move to a general shooting and zoom shooting position. A driving unit controlled by the control unit of the communication device and installed in the barrel unit in combination with the third lens group 130 to install the first lens group 110, the second lens group 120, and the third lens group. A camera device for a communication device having an image processing unit for converting an image of a subject passing through 130 into an electric signal and transmitting the same to an electric signal, and zooming by moving the first lens group 110 and the second lens group 120. Since this becomes possible, there is an effect of clearly photographing a distant subject and a near 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 driving device shown in FIG. 2.

<Explanation of symbols for main parts of drawing>

110: first lens group 120: second lens group

130: third lens group 210: first barrel

212: first slide groove 214: second slide groove

216: second support hole 220: second barrel

222: first inclined groove 224: second inclined groove

226: cover 228: first support hole

230: lever 232: long hole

240: first ring 242: first pin

244: first guide ball 250: second ring

252: second pin 254: second guide ball

260: guide shaft 310: bobbin

320: winding coil 330: drive shaft

332: link portion 334: flange

340: housing 342: opening

350: compression spring 360: permanent magnet

410: image sensor 412: flexible PC

Claims (9)

The first lens group 110 and the second lens group 120 and the first lens group 110 and the second lens group 120 that are movable to the general shooting and zoom photographing positions are aligned with each other. A lens unit having a third lens group 130 fixed thereto; And A barrel portion for supporting the first lens group 110 and the second lens group 120 to be movable; A bobbin 310 made of a nonmagnetic material, a winding coil 320 wound around the bobbin 310 many times, and a part of the bobbin 310 is positioned inside the bobbin 310 and power is applied to the winding coil 320. A drive unit including a drive shaft 330 made of a magnetic material that transmits power to the barrel through the link unit 332 by linear movement by an electromagnetic force generated when the power is generated; The image of the subject coupled to the third lens group 130 and installed in the barrel portion, and passed through the first lens group 110, the second lens group 120, and the third lens group 130. An image processor converting the electric signal; And Receiving an electrical signal of the image processing unit, by applying power to the winding coil 320 to drive the barrel, the first lens group 110 and the second lens group 120 general shooting and zoom photographing position Camera apparatus for a communication device comprising a control unit for moving to. The method according to claim 1, wherein the barrel portion, A first ring 240 coupled to an outer circumferential surface of the first lens group 110 and having two or more first pins 242 on the outer circumferential surface; A second ring 250 coupled to an outer circumferential surface of the second lens group 120 and having two or more second pins 252 on the outer circumferential surface; Two or more first slide grooves 212 in which the first pin 242 is slidably coupled in the optical axis direction are formed, and two or more second slides in which the second pin 252 is slidably coupled in the optical axis direction. A first barrel 210 having a groove 214 formed therein; And It is rotatably coupled to the outer circumference of the first barrel 210 is rotated by receiving the power of the drive unit, the first pin 242 passing through the first slide groove 212 is slidably coupled to the A first inclined groove 222 is formed to reciprocate the first lens group 110 to a general photographing position and a zoom photographing position, and the second pin 252 passing through the second slide groove 214 is formed. And a second barrel (220) slidably coupled and having a second inclined groove (224) for reciprocating the second lens group (120) to a general photographing position and a zoom photographing position. Camera device for use. The method of claim 2, wherein the outer circumferential surface of the second barrel 220 is provided with a lever 230 formed with a long hole 232 toward the center of the second barrel 220, The driving unit is coupled to the long hole (232) camera device for a communication device, characterized in that provided with a link unit 332 reciprocating in the normal direction with respect to the outer peripheral surface of the second barrel (220). According to claim 2, At least one first guide hole 244 is formed on the outer peripheral surface of the first ring 240, At least one second guide hole 254 is formed on the outer circumferential surface of the second ring 250, A guide shaft 260 is slidably coupled to the first guide hole 244 and the second guide hole 254, A first support hole 228 is formed to which the upper end of the guide shaft 260 is coupled, and a cover 226 having an open center is coupled to an upper end of the first barrel 210. Camera device for a communication device, characterized in that the second support hole 216 is coupled to the lower end of the guide shaft 260 is formed on the inner bottom of the first barrel (210). The method of claim 1, wherein the driving unit, And a housing 340 formed of a magnetic material covering the driving shaft 330 and the winding coil 320 and having an opening 342 through which the link part 332 passes. Camera device for use. The method of claim 1, wherein the driving unit, Compression spring 350 for holding the drive shaft 330 in one direction; And Camera device for a communication device further comprises a permanent magnet (360) for pulling the drive shaft (330) in the other direction. The method of claim 1, wherein the image processing unit, The communication device, characterized in that the image sensor 410 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. Camera device for use. delete delete