KR20050108481A - Lens having function of zooming of camera using electromagnet and camera phone with the lens - Google Patents

Abstract

The present invention relates to a zooming technique of a camera, and more particularly to a zooming technique of a camera for driving a zoom lens using an electromagnet.

The present invention is implemented to use the magnetic force to drive the zoom lens at the time of shooting can save the cost of mass production of the lens body of the camera, compact camera phone and durable camera by replacing the complex lens driving motor with a simple electromagnet The phone has the advantage of mass production.

Lens body according to a characteristic aspect of the present invention is formed to surround the focus lens for adjusting the focus of the input subject, the barrel having a barrel magnet attached to the outer surface, coupled to the barrel, the distance between the subject and the lens A barrel part including a zoom lens part attached to a zoom lens magnet on an outer surface thereof, a barrel part formed to be inserted, and a barrel electromagnet attached to a position corresponding to the barrel magnet on an inner side thereof; And a power supply including a lens holder including a zoom lens electromagnet attached to a position corresponding to the zoom lens magnet, a barrel lead wire for supplying current to a barrel electromagnet attached to the lens holder, and a zoom lens lead wire for supplying current to the zoom lens electromagnet. It characterized in that it comprises an input terminal. According to an advantageous aspect of the present invention, by controlling the direction of the drive current of the electromagnet, it is possible to easily control the drive of the lens to present a compact system architecture.

Description

Lens having function of zooming of camera using electromagnet and camera phone using same {Lens having function of zooming of camera using electromagnet and camera phone with the lens}

The present invention relates to a zooming technique of a camera, and more particularly to a zooming technique of a camera for driving a zoom lens using an electromagnet.

A general digital camera has a lens system composed of a plurality of lenses for photographing a subject. The lens system includes a zoom lens for adjusting a distance between a camera and a subject, a focus lens for adjusting a focus of an input subject, and an iris lens for forming an image of a subject input through the focus lens, and is surrounded by a barrel.

An optical signal passing through a red system composed of a plurality of lenses is output as an electric video signal through an imaging device such as a CMOS or a CCD, for example. The image signal output by the image pickup device is provided in the camera and is adapted to each display device by an image signal processor (ISP) or digital signal processor (DSP) chip or image processing module mounted in a microprocessor of the camera. The data is processed in a format and output to a display unit 320 such as an LCD provided in the camera. Accordingly, when a desired image is displayed among the images output on the display 320, the user captures and stores the image by pressing a shutter or inputting a predetermined button.

On the other hand, with the expansion of mobile communication terminals, technology in this field is developing. Due to the demands of consumers and competition among companies, various functions are being added day by day, and camera-equipped terminals have become popular enough to occupy a large part of new terminals recently introduced.

Such a digital camera or a camera mounted in a mobile communication terminal has a zooming function. Zooming refers to a function of continuously changing a focal length of a subject input through a camera lens system, and the zooming function is implemented through a zoom lens. do. In general, the zooming function is operated by moving the zoom lens to a small motor. When a user inputs a zoom operation signal using a wide or tele zoom switch, for example, the microprocessor included in the camera receives the output signal and outputs a zooming control signal for controlling the driving motor. The output zooming control signal drives the driving motor to move the zoom lens.

However, since the driving of the zoom lens of the camera described above is driven by mounting a small motor, it is vulnerable to shock and has a lot of noise.

In addition, since the size of the driving motor cannot be reduced, the size of the camera itself becomes large, and thus, the mobile communication terminal equipped with the camera becomes large as a whole.

The present invention has been made to solve the above problems, and an object thereof is to provide a lens body having a zooming function of a camera using an electromagnet that does not require a lens driving motor and a camera phone using the same.

Furthermore, the present invention provides a lens body having a zooming function of a camera using an electromagnet that can save manufacturing cost when mass producing a lens body, and a camera phone using the same.

Furthermore, the present invention provides a lens body having a zooming function of a camera using an electromagnet capable of mass-producing a lens body of a small camera having a zooming function, and a camera phone using the same.

Furthermore, it aims at providing the compact camera phone which reduced the size of the main body by mounting the small lens body mass-produced.

Furthermore, the present invention provides a lens body having a zooming function of a camera using a durable electromagnet and a camera phone using the same.

In addition, an object of the present invention is to provide a compact system architecture that can be easily controlled by a simple control signal by controlling the direction of driving current of an electromagnet.

A lens body having a zooming function of a camera using an electromagnet and a camera phone using the same according to an aspect of the present invention for achieving the above object is fixed to the focus lens for adjusting the focus of the input subject, the barrel magnet on the outer surface The attached barrel is slidably coupled to the barrel, and a zoom lens for controlling the distance between the subject and the lens is fixed, and a barrel including a zoom lens unit having a zoom lens magnet attached to an outer surface thereof, and the barrel is inserted into the barrel. A barrel for supplying current to a lens holder including a barrel electromagnet attached to the inner side of the barrel magnet, a zoom lens electromagnet attached correspondingly to the zoom lens magnet, and a barrel electromagnet attached to the lens holder. A lead wire and a zoom lens lead wire for supplying current to the zoom lens electromagnet And a camera unit including a lens body including an original input terminal, and an imaging unit for converting and outputting an optical signal input through the lens body into electrical image data.

According to this aspect of the present invention, the driving of the zoom lens can be implemented using only a magnet and an electromagnet instead of a driving motor, thereby saving manufacturing costs during mass production.

Furthermore, the zoom lens can be driven only by the direction and intensity of the electric current applied to the electromagnet attached to the lens holder, and the size of the lens body can be minimized, thus enabling the production of a compact camera phone having a reduced body size.

According to another aspect of the present invention by attaching a plurality of electromagnets to the lens holder, and selectively driving one of them to move the zoom lens unit through the attraction between the electromagnet and the magnet, it is possible to adjust the focus of the subject, the size of the lens body It can be minimized, so it is possible to mass-produce a compact camera phone with a reduced body size.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily understand and reproduce the present invention.

1 is a schematic diagram schematically showing a lens body having a zooming function using an electromagnet according to an exemplary embodiment of the present invention. As shown, the lens body having a zooming function using an electromagnet according to an embodiment of the present invention is fixed to the focus lens 112 for adjusting the focus of the input subject, the barrel magnet 114 is attached to the outer surface And the zoom lens 121 which is coupled to the barrel 111 and the barrel 111 so as to be slidable, and adjusts the distance between the subject and the lens, and has a zoom lens unit 120 attached to the zoom lens magnet 122 on its outer surface. Corresponding to the zoom lens magnet 122, the barrel portion 110 including the barrel, the barrel portion 110 is inserted and formed so as to be slidable, the barrel electromagnet 131 is attached to the inner side and corresponding to the barrel magnet 114, A lens holder 130 including a zoom lens electromagnet 132 attached to the lens holder, a barrel lead wire 141 for supplying current to the barrel electromagnet 131 attached to the lens holder 130, and a current to the zoom lens electromagnet 132. Power source including a zoom lens lead wire 142 for supplying a It characterized in that it comprises an input terminal 140.

The lens holder 130 is formed in a cylindrical shape so that the barrel 111 is inserted and slidable, and the barrel electromagnet 131 is attached to a position corresponding to the barrel magnet 114 of the barrel 111 at one end thereof. . In addition, the zoom lens electromagnet 132 is attached to a position corresponding to the zoom lens magnet 122 of the zoom lens unit 120. Since the polarity of the barrel electromagnet 131 and the zoom lens electromagnet 132 attached to the lens holder 130 changes in accordance with the direction of the applied current, the polarity of the electromagnet may be controlled through the current. The barrel electromagnet 131 provided in the lens holder 130 is connected to the barrel lead wire 141, and the zoom lens electromagnet 132 is connected to the zoom lens lead wire 142 to receive a current. The barrel lead wire 141 and the zoom lens lead wire 142 are connected to a power input terminal 140 for supplying power from the power supply device.

According to an exemplary embodiment of the present invention, the barrel 111 may include a focus lens 112 for adjusting a focus of a subject input to a camera and an iris lens 113 for forming an image of a subject input through the focus lens 112. The lens body 100 including a plurality of lenses is fixed, and the barrel magnet 114 having a certain polarity is provided outside the barrel 111. A barrel electromagnet 131 is attached to the inner surface of the lens holder 130 to correspond to the barrel magnet 114. Since the polarity of the barrel electromagnet 131 changes in accordance with the direction of the applied current, the polarity of the electromagnet may be controlled through the current.

For example, when the barrel magnet 114 attached to the barrel 111 is a permanent magnet having a positive polarity, if a current is applied to the barrel electromagnet 131 to have a positive polarity, the barrel magnet 114 and the barrel may be disposed. Tension exists between the electromagnets 131, and unlike the fixed lens holder 130, the flexible barrel 111 is pushed out of the lens holder 130 by the tension between the two magnets. On the contrary, if a current is applied to the barrel electromagnet 131 to have a negative polarity, an attraction force exists between the barrel magnet 114 and the barrel electromagnet 131 so that the barrel 111 is drawn into the lens holder 130. Therefore, the movement of the barrel 111 can be controlled in accordance with the direction of the current applied to the barrel electromagnet 131.

The zoom lens unit 120 including the zoom lens 121 is coupled to the barrel 111 such that the zoom lens 121 is slidable in front of the focus lens 112, and a zoom lens having a predetermined polarity outside the zoom lens unit 120. And a magnet 122. In addition, a zoom lens electromagnet 132 is attached to the inner surface of the lens holder 130 so as to correspond to the zoom lens magnet 122, and the zoom lens electromagnet 132 is attached to the opposite side of the barrel electromagnet 131. The zoom lens magnet 122 attached to the zoom lens unit 120 and the zoom lens electromagnet 132 attached to the lens holder 130 include the barrel magnet 114 of the barrel 111 and the barrel electromagnet 131 of the lens holder 130. And are staggered so as not to be affected by each other.

For example, when the zoom lens magnet 122 attached to the zoom lens unit 120 is a magnet having a positive polarity, if a current is applied to the zoom lens electromagnet 132 to have a positive polarity, the zoom lens magnet 122 and the zoom lens Tension is present between the electromagnets 132 and the zoom lens unit 120 is pushed out of the lens holder 130 by the tension between the two magnets. Therefore, the tele function, which is a long distance shooting, is possible. On the contrary, if a current is applied to the zoom lens electromagnet 132 to have negative polarity, an attraction force exists between the zoom lens magnet 122 and the zoom lens electromagnet 132 and the zoom lens unit 120 is drawn into the lens holder 130. . Therefore, the wide function of close-range photography is possible.

2 is an operating state diagram schematically showing an operating state of a lens body having a zooming function using an electromagnet according to another embodiment of the present invention. As shown, the lens holder 130 according to the present invention has a plurality of zoom lens electromagnets at predetermined intervals to correspond to the positions of the zoom lens 121 corresponding to, for example, 1x zoom, 2x zoom, 3x zoom inside thereof. 132 may be provided. Each of the zoom lens electromagnets 132 is connected to the zoom lens lead wire 142 and is selectively driven according to the current supplied through the zoom lens lead wire 142. For example, when the zoom lens magnet 122 having a positive polarity is attached to the zoom lens unit 120, a current is applied to one of the plurality of zoom lens electromagnets 132 provided in the lens holder 130 to have a negative polarity. If applied, the attraction force between the zoom lens magnet 122 and the zoom lens electromagnet 132, unlike the fixed lens holder 130, the flexible zoom lens unit 120 is the zoom lens magnet 122 and the zoom lens electromagnet 132 It is moved by manpower between). Accordingly, by selectively driving one of the plurality of zoom lens electromagnets 132 to generate a attraction force with the zoom lens magnet 122 attached to the zoom lens unit 120, the user can move the zoom lens unit 120 at a desired magnification and take a picture. have.

3 is a block diagram schematically showing the configuration of a camera phone according to an embodiment of the present invention. As shown, the mobile communication terminal according to the present embodiment includes the phone control unit 200 and its subcircuits, which are largely common to the existing mobile communication terminal, and the lens body 410 described with reference to FIG. 1 or 2. The camera unit 400 includes an imaging unit 420 which converts an optical signal input through the lens body 410 into electrical image data and outputs the electrical signal, and a barrel electromagnet 131 through the power input terminal 140. The barrel driver 360 for controlling the current supplied to the zoom lens, the zoom lens driver 370 for controlling the current supplied to the zoom lens electromagnet 132 through the power input terminal 140, and the subject input from the imaging unit 420. The focus adjusting unit 510 outputs the focus control signal of the subject to the barrel driving unit 360 by comparing the image data, and the driving signal of the zoom lens 121 is output to the zoom lens driving unit 370 according to the zoom lens driving command input from the user. Zumren And a signal processor 500 including a lens adjuster 520 and an image processor 530 for processing an image signal output from the camera 400 and outputting the image signal to the display 320 of the camera phone. It is done.

The accessory circuits include a keypad 310, a display unit 320 for displaying a menu and an operation state, and an image signal of a subject output from the camera unit 400, and a radio for extracting voice and data signals from a radio signal transmitted and received through an antenna. The communication unit 330 and a voice input / output circuit 340 for inputting and outputting a voice call signal from the wireless communication unit 330 through a microphone and a speaker.

The keypad 310 and the display unit 320 which is a liquid crystal display device may have a conventional well-known configuration. In addition, the wireless communication unit 330 is configured to include an antenna and RF circuit for communication with the base station. In the present specification, the wireless communication unit 330 is interpreted to cover not only various versions of CDMA but also existing methods such as cellular, GSM, and W-CDMA, as well as mobile communication methods to be introduced in the future. The voice input / output circuit 340 is a well-known configuration that processes digital voice data into an analog voice signal or vice versa, and includes an additional circuit such as an audio amplifying circuit or a filter.

The baseband circuit of the wireless communication unit 330 and most of the circuits of the phone control unit 200 are commercially provided as a single integrated circuit. This integrated circuit, commonly referred to as an MSM chip, includes dedicated hardware to process communications therein, a digital signal processor and a general purpose microprocessor. Logically, these include a communication control unit 210 for controlling voice and data communication, and a system control unit 220 for controlling the entire system according to an operation signal or an operation state input from the keypad 310. The system controller 220 supports a convenient application environment such as a virtual machine, and can process various controls according to a characteristic aspect of the present invention by a program.

The system controller 220 may interface with external ICs through a serial bus such as an I ² C bus to control them. When an operation command is input from the user through the operation unit or an event such as a call reception occurs, the system controller 220 issues a necessary control command.

The camera unit 400 includes a lens body 410, an image capturing unit 420, and a data converter 430, and an image signal electrically transmitted by the image capturing unit 420 to an optical signal input from the lens body 410. Convert to and print it out. The lens body 410 is fixed to the focus lens 112 for adjusting the focus of the input subject, and coupled to the barrel 111 and the barrel 111, the barrel magnet 114 is attached to the outer surface thereof so as to be slidable. However, the zoom lens 121 for controlling the distance between the subject and the lens is fixed, the barrel portion 110 including the zoom lens portion 120 is attached to the zoom lens magnet 122 on the outer surface, and the barrel portion 110 is inserted A lens holder 130 including a barrel electromagnet 131 attached to the barrel magnet 114 and a zoom lens electromagnet 132 attached to the zoom lens magnet 122. ), A power supply terminal including a barrel lead wire 141 for supplying current to the barrel electromagnet 131 attached to the lens holder 130, and a zoom lens lead wire 142 for supplying current to the zoom lens electromagnet 132. 140). A detailed description of the lens body 410 applied to the camera phone according to the present invention has been described in detail with reference to FIGS. 1 and 2, and thus a detailed description thereof will be omitted.

The imaging unit 420 converts an optical signal input from the lens body 410 into an electrical signal, converts the optical signal into a digital signal, and outputs the digital signal. The imaging unit 420 is generally composed of a CMOS imaging device or a CCD imaging device, and is a known device that converts light into an electrical signal for each pixel and sequentially outputs the light in synchronization with a clock. The data converter 430 converts a current or a voltage proportional to the image brightness output from the imaging unit 420 into digital data through some processing, and converts the data value into a YUV format for output. In another embodiment, the data converter 430 may further include a codec for compressing the captured image in the JPEG format or the MPEG format, as in the known camera module.

In the present invention, the video signal inside the camera phone is distributed on the bus in a single format, which in one embodiment is the YUV format. Therefore, each image processing module converts the internal output into YUV format and outputs the internal input.

According to a characteristic aspect of the present invention, the camera phone according to the present invention compares the subject image data input from the image pickup unit 420 and outputs the focus control signal of the subject to the barrel driver 360, and the focus adjusting unit 510, The zoom lens adjusting unit 520 outputs the driving signal of the zoom lens 121 to the zoom lens driving unit 370 according to the driving command of the zoom lens 121 input from the user, and the image signal output from the camera unit 400 processes the camera. It includes a signal processor 500 including an image processor 530 to output to the display unit 320 of the phone.

The focus adjusting unit 510 is implemented with, for example, an image signal processor (ISP) chip, and receives and processes image data converted by the imaging unit 420 at an interval of 60 frames per second. The focus adjusting unit 510 monitors image data input in real time from the image capturing unit 420, and compares and calculates a residual of the previous input image data and the currently input image data to position the barrel 111 according to the correct focus of the subject. Calculate The focus adjusting unit 510 compares the position of the current barrel 111 with the position of the barrel 111 according to the calculated correct focus, and outputs a focus control signal to the barrel driver 360.

The barrel driver 360 receives the focus control signal output from the focus adjuster 510 and drives the barrel electromagnet 131 attached to the lens holder 130 through the barrel lead line 141 of the power input terminal 140. Supply the current. The barrel 111 includes a barrel magnet 114 that is a permanent magnet at a position corresponding to the barrel electromagnet 131. The barrel driving unit 360 is adapted to the attraction or tension depending on the polarity of the barrel electromagnet 131 generated by applying a current to the barrel electromagnet 131 of the lens holder 130 and the polarity of the barrel magnet 114 of the barrel 111. The movement of the barrel 111 can be controlled by this. For example, if a current is applied to the barrel electromagnet 131 to have a positive polarity when the barrel magnet 114 attached to the barrel 111 has a positive polarity, the barrel magnet 114 and the barrel electromagnet 131 Tension is present between the), the barrel 111 is pushed out of the lens holder 130 by the tension between the two magnets (114). On the contrary, if a current is applied to the barrel electromagnet 131 to have a negative polarity, an attraction force exists between the barrel magnet 114 and the barrel electromagnet 131 so that the barrel 111 is drawn into the lens holder 130. Therefore, the movement of the barrel 111 can be controlled according to the direction of the current applied to the barrel electromagnet 131, thereby performing an auto focusing function.

For example, the zoom lens adjusting unit 520 may control a user's operation of the zoom lens 121 through a predetermined button on the keypad 310 of the camera phone or a zoom button 350 for inputting an operation command to the zoom lens 121. When received, the driving signal of the zoom lens 121 for moving the zoom lens unit 120 in the tele or wide direction is output according to the corresponding operation command.

The zoom lens driver 370 receives a driving signal of the zoom lens 121 output from the zoom lens adjusting unit 520 and is attached to the zoom lens electromagnet attached to the inside of the lens holder 130 through the zoom lens lead line 142 of the power input terminal 140. 132 supplies the drive current. The zoom lens unit 120 includes a zoom lens magnet 122 that is a permanent magnet at a position corresponding to the zoom lens electromagnet 132. The zoom lens driver 370 applies a force or tension according to the polarity of the zoom lens electromagnet 132 generated by applying a current to the zoom lens electromagnet 132 of the lens holder 130 and the polarity of the zoom lens magnet 122 of the zoom lens unit 120. The movement of the zoom lens unit 120 may be controlled by using the same.

For example, when a user wants to photograph a subject far away from the camera lens using the zoom lens 121, the user may use a predetermined button on the keypad 310 of the camera phone or the tele function of the zoom button 350. Enter the corresponding button. The tele function of the zoom lens 121 is to enlarge the distance between the zoom lens 121 and the image capturing unit 420 to photograph an object of a long distance. The zoom lens adjusting unit 520 outputs a driving signal to the zoom lens driving unit 370 to move the zoom lens unit 120 to the outside of the lens holder 130 according to the input tele manipulation command. The zoom lens driver 370 receives a signal from the zoom lens adjusting unit 520 and applies a corresponding current to the zoom lens electromagnet 132 to have the same polarity as that of the zoom lens magnet 122 of the zoom lens unit 120. Accordingly, due to the tension generated between the zoom lens magnet 122 and the zoom lens electromagnet 132, the zoom lens unit 120 moves to the outside of the lens holder 130, and the distance between the zoom lens 121 and the image capturing unit 420 increases. Enable the function.

In addition, when the user inputs a button corresponding to the wide function when photographing a subject close to the camera, the zoom lens adjusting unit 520 moves the zoom lens unit 120 to the inside of the lens holder 130 according to the input tele manipulation command. The driving signal is output to the zoom lens driver 370 in order to make it. The zoom lens driver 370 receives a signal from the zoom lens adjusting unit 520 and applies a corresponding current to the zoom lens electromagnet 132 to have a polarity different from that of the zoom lens magnet 122 of the zoom lens unit 120. Therefore, due to the attraction force generated between the zoom lens magnet 122 and the zoom lens electromagnet 132, the zoom lens unit 120 moves to the inside of the lens holder 130, and the distance between the zoom lens 121 and the image capturing unit 420 is reduced and wide. Enable the function.

The image processor 530 processes the image signal output from the image capturing unit 420 of the camera unit 400, that is, the image signal of the photographed subject according to the control signal of the system controller 220, and outputs the image signal to the display unit 320. . The image processor 530 scales an interpolation and a decrementation process to match the resolution of the input image signal to the resolution of the display device, and additionally stores a codec for storing or decompressing image data into an internal memory. It includes. In one embodiment, the codec includes an MPEG encoder / decoder and a JPEG encoder / decoder for compressing, storing and reading the captured image frame as a still image. These are implemented by the DSP and the core. In addition, the image processor 530 may include a sharpness enhancement circuit for improving image quality, and a contrast and contrast control function. You can even include some simple filter functions to give you graphical effects.

Operation of the camera phone having a zooming function using an electromagnet according to the present invention will be described in more detail with reference to FIG. 4. 4 is a flowchart illustrating an operation of a camera phone having a zooming function using an electromagnet according to an exemplary embodiment of the present invention. As shown, when the camera phone having the zooming function using the electromagnet according to the present invention drives the camera unit 400 for photographing, the system controller 220 of the camera phone drives the auto focus function. The optical signal input from the lentz body of the camera unit 400 is converted into image data by the imaging unit 420 and output to the focus adjusting unit 510 (S210). The focus adjusting unit 510 monitors the image data input in real time from the image capturing unit 420, and compares and calculates the residual of the previous input image data and the currently input image data to focus the lens 112 according to the correct focus of the subject. Calculate the position of (S220). The focus adjusting unit 510 outputs a focus control signal to the barrel driving unit 360 to drive the barrel 111 to the position of the focus lens 112 according to the calculated focus.

The barrel driver 360 applies a current to the barrel lead wire 141 connected to the barrel electromagnet 131 of the lens holder 130 according to the received focus control signal according to the focus control signal. The polarity of the barrel electromagnet 131 of the lens holder 130 is changed according to the direction of the applied current. For example, if the positive pole of the barrel magnet 114 of the barrel 111 is attached to correspond to the barrel electromagnet 131 of the lens holder 130, the lens barrel 130 may be moved out of the lens holder 130 when the focus is near. The focus adjuster 510 outputs a focus control signal to the barrel driver 360 so that tension is generated between the barrel magnet 114 and the barrel electromagnet 131 because it must be pushed toward the side. The barrel driver 360 receives a focus control signal and applies a current in a corresponding direction to the electromagnet 121 so that tension is generated between the barrel magnet 114 and the barrel electromagnet 131.

Tension is generated in the barrel magnet 114 and the barrel electromagnet 131 according to the current applied from the barrel driver 360, and the barrel 111 is pushed by the force between the barrel magnet 114 and the barrel electromagnet 131. Is pushed out of the lens holder 130. The method of moving the barrel 111 into the lens holder 130 is possible by applying a current in the opposite direction to the electromagnet 121. The focus adjusting unit 510 calculates a focus varying according to the distance between the subject and the barrel 111, and outputs the position of the barrel 111 according to the correct focus to the barrel driver 360 through a focus control signal, and the barrel driver 360. ) Adjusts the direction of the current applied to the barrel electromagnet 131 according to the focus control signal. The focus adjusting unit 510 receives the image data input in real time and repeats the above steps until the user's end command is input to adjust the correct focus of the corresponding subject (S240).

In addition, when the user inputs an operation command by pressing a predetermined button on the keypad 310 of the camera phone or the zoom button 350 to use the zoom lens 121 in use, the system controller 220 may adjust the zoom lens adjustment unit 520. And transmits the input operation command (S250). The zoom lens adjusting unit 520 receives an operation command of the zoom lens 121 and outputs a driving signal of another zoom lens 121 to the zoom lens driver 370 in response to the command (S260). For example, when the user's operation command is the movement of the zoom lens 121 for the tele function, the current is supplied to the zoom lens electromagnet 132 to generate the same polarity as that of the zoom lens magnet 122 of the zoom lens unit 120. 142). The current applied from the zoom lens driver 370 through the zoom lens lead line 142 activates the zoom lens electromagnet 132, and the zoom lens electromagnet 132 has the same polarity as the zoom lens magnet 122 so that tension is generated between the two magnets. Will be done. The zoom lens unit 120 moves to the outside of the lens holder 130 by the tension generated between the two magnets to perform the tele function of the zoom lens 121.

When the zoom lens 121 is moved by the magnification desired by the user, the focus adjusting unit 510 adjusts the focus of the image of the subject input through the zoom lens 121, and the focus adjusting method is as described above. In addition, when the user's operation command of the zoom lens 121 is wide, the direction of the current applied to the zoom lens electromagnet 132 is reversed and applied, whereby an attraction force between the two magnets is generated, thereby causing the zoom lens unit 120 to have a lens holder 130. It is moved to be drawn into (S270). Therefore, the camera phone according to the present invention can control the direction of the current applied to the electromagnet, it is possible to implement the auto focus and zooming function of the camera.

According to another aspect of the present invention, the lens holder 130 of the camera phone having a zooming function using an electromagnet according to the present invention, the zoom lens 121 corresponding to, for example, 1x zoom, 2x zoom, 3x zoom inside thereof. A plurality of zoom lens electromagnets 132 may be provided at predetermined intervals so as to correspond to the position of. Each of the zoom lens electromagnets 132 is connected to the zoom lens lead wire 142 and selectively driven according to a current supplied through the zoom lens lead wire 142, and the zoom lens electromagnet 132 and the zoom lens attached to the zoom lens part 120 are driven. By moving the zoom lens unit 120 to a position corresponding to a predetermined magnification by an attraction force between the magnets 122, a zooming function may be implemented.

When the user drives the camera unit 400 to take a picture, the system controller 220 of the camera phone drives the auto focus function. The optical signal input from the lentz body of the camera unit 400 is converted into image data by the imaging unit 420 and output to the focus adjusting unit 510.

The focus adjusting unit 510 monitors the image data input in real time from the image capturing unit 420, and compares and calculates the residual of the previous input image data and the currently input image data to focus the lens 112 according to the correct focus of the subject. Calculate the position of. The focus adjuster 510 outputs a focus control signal to the barrel driver 360 to drive the barrel 111 to the position of the focus lens 112 according to the correct focus.

The barrel driver 360 checks the barrel electromagnet 131 corresponding to the received focus control signal, that is, the position of the focus lens 112 according to the correct focus, and focuses on the barrel lead wire 141 connected to the barrel electromagnet 131. Apply current according to the control signal. The barrel electromagnet 131 of the lens holder 130 is driven by the applied current. For example, if the barrel electromagnet 131 corresponding to the barrel magnet 114 of the current barrel 111 is the barrel electromagnet 131, the barrel 111 is moved to the outside of the lens holder 130 when the focus is near. Should If the barrel electromagnet 131 attached to the lens holder 120 outside of the barrel tube electromagnet 131 is the barrel tube electromagnet 131, the focus adjusting unit 510 may be the tube barrel electromagnet 131 and the barrel magnet 114. The focus control signal is output to the barrel driver 360 so that an attraction force is generated between the beams.

The barrel driver 360 receives the focus control signal and transmits the four barrels through the barrel lead wire 141 connected to the four barrel magnets 131 so that an attraction force is generated between the barrel magnet 114 and the four barrel electromagnets 131. The electromagnet 131 is driven by applying a current. The attraction magnet is generated in accordance with the current applied from the barrel driving unit 360 and the barrel magnet 114 and the barrel magnet 114 of the barrel 111, and the barrel 111 moves to the outside of the lens holder 130. . In the case of the far focus, the method of moving the barrel 111 into the lens holder 130 may be performed by driving the barrel electromagnet 131 located inside the lens holder 130.

The focus adjusting unit 510 calculates a focus varying according to the distance between the subject and the barrel 111, and outputs the position of the barrel 111 according to the correct focus to the barrel driver 360 through a focus control signal, and the barrel driver 360. ) Drives the barrel electromagnet 131 corresponding to the corresponding position among the plurality of barrel electromagnets 131 according to the focus control signal. An attractive force is generated between the barrel electromagnet 131 and the barrel magnet 114 driven as described above, and the focus is adjusted by moving the barrel 111 using the barrel. The focus adjusting unit 510 receives the image data input in real time and repeats the above steps until the user's end command is input to adjust the correct focus of the subject.

In addition, when the user inputs an operation command by pressing a predetermined button on the keypad 310 of the camera phone or the zoom button 350 to use the zoom lens 121 in use, the system controller 220 may adjust the zoom lens adjustment unit 520. Send the operation command entered with). The zoom lens adjusting unit 520 receives an operation command of the zoom lens 121 and outputs a driving signal of the zoom lens 121 according to the command to the zoom lens driver 370.

The zoom lens driver 370 checks the zoom lens electromagnet 132 corresponding to the position of the zoom lens 121 according to the received zoom lens driving signal, that is, the magnification input by the user, and the zoom lens lead wire 142 connected to the zoom lens electromagnet 132. The current is applied according to the zoom lens driving signal. The zoom lens electromagnet 132 of the lens holder 130 is driven by an applied current. For example, when the zoom lens electromagnet 132 corresponding to the position where the first zoom lens 121 corresponds to 1 magnification is the third zoom lens electromagnet 132, when the input magnification is 2 × zoom, the zoom lens unit 120 may be a lens holder ( 130) You have to move outward. If the zoom lens electromagnet 132 attached to the lens holder 130 outside of the third zoom lens electromagnet 132 is the fourth zoom lens electromagnet 132, the zoom lens adjusting unit 520 is the fourth zoom lens electromagnet 132 and the zoom lens magnet 122. The focus control signal is output to the zoom lens driver 370 to generate an attraction force between the < RTI ID = 0.0 >

The zoom lens driver 370 receives the zoom lens driving signal and the zoom lens 4 through the zoom lens lead wire 142 connected to the 4 zoom lens electromagnet 132 so that attraction force occurs between the zoom lens magnet 122 and the 4 zoom lens electromagnet 132. The electromagnet 132 is driven by applying a current. The attraction force is generated by the zoom lens magnet 122 and the zoom lens electromagnet 132 of the zoom lens unit 120 according to the current applied from the zoom lens driver 370, and the zoom lens unit 120 moves to the outside of the lens holder 130. Will be done. When the wide function of the zoom lens 121 is input from the user, the method of moving the zoom lens unit 120 into the lens holder 130 is performed by using a lens rather than the position of the zoom lens electromagnet 132 corresponding to the current zoom lens unit 120. This is possible by driving the zoom lens electromagnet 132 located inside the holder 130. Therefore, the camera phone according to the present invention can control the direction of the current applied to the electromagnet, it is possible to implement the auto focus and zooming function of the camera.

As described in detail above, a lens body having a zooming function of a camera using an electromagnet and a camera phone using the same according to the present invention are driven by driving a zoom lens according to a zooming function using an electromagnet, thereby saving manufacturing costs during mass production. There is this.

In addition, by using a small magnet and an electromagnet, the lens body of the small camera can be mass-produced, and the mass-produced small lens body is mounted in the mobile communication terminal, thereby reducing the size of the main body, and a compact camera phone having high durability. It is effective to mass-produce camera phones.

In addition, it has the effect that easy control is possible only by the direction control signal of the electromagnet driving current, and has the advantage of having a compact system architecture.

The present invention has been described above with reference to preferred embodiments, but is not limited thereto, and is interpreted by the appended claims, which are intended to cover many modifications that will be apparent to those skilled in the art without departing from the scope of the present invention. Should be done.

1 is a schematic diagram schematically showing a lens body having a zooming function using an electromagnet according to an exemplary embodiment of the present invention.

2 is an operating state diagram schematically showing an operating state of a lens body having a zooming function using an electromagnet according to another embodiment of the present invention.

3 is a block diagram of a camera phone having a zooming function using an electromagnet according to an exemplary embodiment of the present invention.

4 is a flowchart illustrating an operation of a camera phone having a zooming function using an electromagnet according to an exemplary embodiment of the present invention.

<Description of the symbols for the main parts of the drawings>

100. Lens body 110. Body part

111.Body 112.Focus Lens

113. Iris Lens 114. Tube Magnet

120. Zoom lens section 121. Zoom lens

122. Zoom lens magnet 130. Lens holder

131. Electric barrel electromagnet 132.Zoom lens electromagnet

140. Power input terminal 141. Tube lead wire

142. Zoom lens lead wire 200. Phone control unit

210. Communication control unit 220. System control unit

310. Keypad 320. Display

330. Wireless communication unit 340. Voice input and output circuit

350. Zoom Button 360. Shaft Drive

370. Zoom lens driving unit 400. Camera unit

410. Lens body 420. Imaging unit

430. Data converter 500. Signal processor

510. Focus adjuster 520. Zoom lens adjuster

530. Image processing unit

Claims (9)

A focus lens for adjusting a focus of an input subject is fixed, a barrel having a barrel magnet attached to an outer surface thereof, and a zoom lens that is slidably coupled to the barrel and that adjusts a distance between the subject and the lens, and is fixed to the outside thereof. A barrel portion including a zoom lens portion having a zoom lens magnet attached to a surface thereof; A lens holder including a barrel electromagnet formed to be slidable by the barrel part, the barrel electromagnet attached to the inner side of the barrel magnet, and a zoom lens electromagnet attached to the zoom lens magnet; A power input terminal including a barrel lead wire for supplying current to a barrel electromagnet attached to the lens holder, and a zoom lens lead wire for supplying current to the zoom lens electromagnet; Lens body having a zooming function using an electromagnet including a. 2. The lens body according to claim 1, wherein a plurality of the barrel electromagnets and the zoom lens electromagnets are attached to the inside of the lens holder. The method of claim 1 or 2, wherein the barrel is: A plurality of barrel electromagnets are moved by the attractive force between the barrel electromagnet and the barrel magnet driven according to a current supplied through the barrel lead wire; The zoom lens unit: A plurality of zoom lens electromagnets being moved by an attraction force between the zoom lens electromagnet and the zoom lens magnet driven according to a current supplied through the zoom lens lead wire; Lens body having a zooming function using an electromagnet characterized in that. A keypad; A display unit for displaying a menu and an operation state; A wireless communication unit for extracting a voice and data signal from a wireless signal transmitted and received through an antenna; A voice input / output circuit for inputting and outputting a voice call signal from the wireless communication unit through a microphone and a speaker; A mobile communication terminal comprising: a phone control unit including a communication control unit for controlling voice and data communication, and a system control unit controlling an entire system according to an operation signal or an operation state input from the keypad. A camera unit including a lens body including a plurality of lenses for adjusting a distance and a focus of an input subject, and an imaging unit for converting and outputting an optical signal input through the lens body into electrical image data; A signal processing unit including a focus adjusting unit configured to receive and monitor image data output in real time from the image pickup unit, calculate a difference between an input image and a previous image, and output a focus control signal; A barrel driver for controlling power supplied to a barrel electromagnet through the lead wires according to a focus control signal output from the focus controller; A zoom lens driver for controlling power supplied to a zoom lens electromagnet through the lead wire according to a user's operation command; Camera phone having a zooming function using an electromagnet comprising a. The method of claim 4, wherein the lens body: A focus lens for adjusting a focus of an input subject is fixed, a barrel having a barrel magnet attached to an outer surface thereof, and a zoom lens that is slidably coupled to the barrel and that adjusts a distance between the subject and the lens, and is fixed to the outside thereof. A barrel portion including a zoom lens portion having a zoom lens magnet attached to a surface thereof; A lens holder including a barrel electromagnet formed to be slidable by the barrel part, the barrel electromagnet attached to the inner side of the barrel magnet, and a zoom lens electromagnet attached to the zoom lens magnet; A power input terminal including a barrel lead wire for supplying current to a barrel electromagnet attached to the lens holder, and a zoom lens lead wire for supplying current to the zoom lens electromagnet; Camera phone having a zooming function using an electromagnet comprising a. The camera phone according to claim 5, wherein a plurality of the barrel electromagnets and the zoom lens electromagnets are attached to the inside of the lens holder. The method of claim 5 or 6, wherein the barrel is: A plurality of barrel electromagnets are moved by the attractive force between the barrel electromagnet and the barrel magnet driven according to a current supplied through the barrel lead wire; The zoom lens unit: A plurality of zoom lens electromagnets being moved by an attraction force between the zoom lens electromagnet and the zoom lens magnet driven according to a current supplied through the zoom lens lead wire; Camera phone with a zooming function using an electromagnet characterized in that. The method of claim 4, wherein the camera unit: A data converter configured to convert the electrical image data output from the imaging unit into a predetermined video signal and output the converted video signal; The signal processing unit: A video processor for processing the video signal output from the data converter, converting the video signal into a format output to a display unit, and outputting the converted video signal to a display unit of a mobile communication terminal; Camera phone with a zooming function using an electromagnet characterized in that. The method of claim 8, Camera phone having a zooming function using an electromagnet, characterized in that the video signal output from the data converter is YUV.