KR20060076588A - Wireless communication terminal for compensating vibration during photographing image - Google Patents

Abstract

1. TECHNICAL FIELD OF THE INVENTION

The present invention relates to a wireless communication terminal having a shake correction function when taking an image.

2. The technical problem to be solved by the invention

The present invention is provided with a motion detecting unit for detecting the movement of the image capturing unit in the wireless communication terminal to grasp the position change of the image capturing unit due to the hand shake during the image capturing, using the image capturing unit in the direction opposite to the changed position The present invention has a purpose of providing a wireless communication terminal having a shake correction function for image capturing, which can obtain a high-quality image by correcting a shake of the image capturing unit during image capturing.

3. Summary of Solution to Invention

According to an aspect of the present invention, there is provided a wireless communication terminal comprising: image photographing means for photographing an image; Support means for supporting the image photographing means; Motion detection means for detecting a motion of the image photographing means and outputting a motion detection signal corresponding thereto; Control means for receiving a motion detection signal from the motion detection means and analyzing the motion detection signal to control the position adjustment means; And position adjusting means for adjusting the position of the image photographing means according to the control of the control means.

4. Important uses of the invention                 

The present invention is used for a terminal having an image capturing unit.

Image capturing unit, image stabilizer, position fixing unit, motion sensor unit, hall sensor, position controller

Description

Wireless communication terminal for compensating vibration during photographing image             

1 is a configuration diagram of an embodiment of a wireless communication terminal having a shake correction function when taking an image according to the present invention;

2 is a diagram illustrating an example of a wireless communication terminal having a shake correction function during image capturing according to the present invention.

* Explanation of symbols for the main parts of the drawings

11: Image capturing unit 12: Location fixing

13 motion detection unit 14 control unit

15: position adjusting unit 16: back-end chip

17: storage unit 121: fixed device

131: Hall sensor 151: motor

The present invention relates to a wireless communication terminal having a shake correction function when taking an image. More particularly, the wireless communication terminal includes a motion detecting unit for detecting a movement of the image taking unit. By detecting the change and moving the image pickup unit in a direction opposite to the changed position by using the change, the image having a vibration correction function during image capturing can obtain a high quality image by compensating for the vibration of the image capturing unit during image capturing It relates to a communication terminal.

In the present invention, a wireless communication terminal is a mobile communication terminal, a personal portable terminal (PCS), a personal digital terminal (PDA), a smart phone, a next generation mobile communication terminal (IMT-2000), wireless communication such as a wireless terminal while carrying the individual Say possible terminal.

Advantages of the wireless communication terminal may be various, but above all, it is said that the greatest advantage is in the mobility provided to the user who is calling. Due to this mobility, the number of wireless communication subscribers has increased exponentially, and in recent years, wireless communication terminals are widely used by the general public.

As the number of users of wireless communication terminals increases, users of wireless communication terminals hope that the wireless communication terminals provide more additional functions. In response to these demands, camera phones have recently been released and are becoming explosive among users. In particular, wireless communication terminals equipped with ultra-compact digital cameras have enjoyed a lot of popularity due to the convenience of taking pictures and sending them immediately to the desired party. Because of the development of camera technology, image quality is approaching the level of general digital cameras. Along with color liquid crystal displays (LCDs), digital cameras are becoming essential items for wireless communication terminals.

On the other hand, in the case of a general camera, the shutter speed should be about 1/125, so that the user can obtain a stable resolution without shaking even when the user's hand shakes.

However, in case of a camera equipped with a wireless communication terminal, the shutter speed cannot be obtained as in the case of a general camera, and even if an auto focus function is used, if the terminal is shaken at the time of shooting, the result is that the picture is less sharp. I had to get it.

There are no wireless communication terminals with circuits that can compensate for this problem. As the resolution of cameras increases to 2 million and 3 million pixels, the frame rate will drop further to 4 frames and 5 frames per second. Even in the wireless communication terminal adopting the camera of the camera, there was a problem that can not prevent the sharpness drops due to the hand shake when shooting the image.

The present invention has been proposed to solve the above problems, and includes a motion detecting unit for detecting the movement of the image capturing unit in the wireless communication terminal to grasp the position change of the image capturing unit due to the hand shake during image capturing, It is an object of the present invention to provide a wireless communication terminal having a shake correction function during image capturing, by moving the image capturing unit in a direction opposite to a position, so as to obtain a high quality image by correcting a shake of the image capturing unit during image capturing. .

Other objects and advantages of the present invention can be understood by the following description, and will be more clearly understood by the embodiments of the present invention. Also, it will be readily appreciated that the objects and advantages of the present invention may be realized by the means and combinations thereof indicated in the claims.

An apparatus of the present invention for achieving the above object is a wireless communication terminal, the image taking means for shooting an image; Support means for supporting the image photographing means; Motion detection means for detecting a motion of the image photographing means and outputting a motion detection signal corresponding thereto; Control means for receiving a motion detection signal from the motion detection means and analyzing the motion detection signal to control the position adjustment means; And position adjusting means for adjusting the position of the image photographing means according to the control of the control means.

The above objects, features and advantages will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, whereby those skilled in the art may easily implement the technical idea of the present invention. There will be. In addition, in describing the present invention, when it is determined that the detailed description of the known technology related to the present invention may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a configuration diagram of a wireless communication terminal having a shake correction function when taking an image according to the present invention.

As shown in FIG. 1, the wireless communication terminal having a shake correction function when capturing an image according to the present invention includes an image capturing unit 11, a position fixing unit 12, a motion detecting unit 13, a controller 14, A position adjusting unit 15, a back end chip 16, and a storage unit 17.

The image photographing unit 11 serves to photograph an image of a subject.

In this case, the image capturing unit 11 includes two or three lenses for acquiring an image, an image conversion sensor (CCD sensor or CMOS sensor) for converting the image acquired from the lens into an electrical signal, and the lens. It includes a barrel surrounding the image conversion sensor.

In addition, the image capturing unit 11 may further include an auto focus (AF) circuit when the wireless communication terminal supports a resolution of 2 million pixels or more.

In this case, the autofocus circuit is generally divided into a voice coil motor (VCM) system and a stepping motor system. In the case of the VCM method, there is a voice coil and a permanent magnet in the autofocus circuit, and the stepping motor method also includes a magnet therein.

The image photographing unit 11 may further include a digital signal processing unit therein for converting the electrical signal changed by the image conversion sensor into the form of data.                     

On the other hand, the position fixing part 12 serves to fix the image capturing unit 11 to the case of the wireless communication terminal. At this time, the position fixing part 12 may be implemented as a plurality of fluidity fixing device that allows a small flow as an example.

In addition, the motion detector 13 detects a motion of the image capture unit 11 due to shaking when taking an image and transmits a corresponding motion detection signal to the controller 15.

At this time, the motion detector 13 reacts with the magnets configured in the autofocus circuit to detect the strength of different magnetic forces and converts the detected magnetic strength into a motion detection signal which is an electrical signal. Can be implemented with sensors.

The controller 14 receives the motion detection signal from the motion detector 13 and analyzes the motion detection signal to control the position adjuster 15. At this time, the control unit 14 controls the position adjusting unit 15 to move the image capturing unit 11 in a direction opposite to the movement position detected by the motion detecting unit 13.

The position adjusting unit 15 adjusts the position of the image capturing unit 11 under the control of the controller 14. In this case, the position adjusting unit 15 may be implemented as a plurality of motors, for example, to freely move the position of the image capturing unit 11 in all directions.

Meanwhile, the back end chip 16 converts the YUV data received from the image capturing unit 11 into a single picture and compresses the picture.

The storage unit 17 stores the final compressed image obtained by compressing the image photographed by the image capturing unit 11.

2 is a diagram illustrating an example of a wireless communication terminal having a shake correction function during image capturing according to the present invention.

In FIG. 2, the position fixing unit 12, the motion detecting unit 13, and the position adjusting unit 15 described with reference to FIG. 1 will be described in more detail with reference to specific embodiments. However, the present invention is not limited to that shown in FIG. That is, the position fixing unit 12, the motion detecting unit 13, and the position adjusting unit 15 are not limited to the number and shape or type of elements constituting each portion.

As shown in FIG. 2, the position fixing unit 12 includes four fixing devices 121 provided on the top, bottom, left, and right sides between the barrel and the case of the wireless communication terminal, which constitute the outside of the image capturing unit 11. Include. At this time, the four fixing device 121 has a slight fluidity, and serves to pull the image taking unit 11 in the top, bottom, left and right.

As shown in FIG. 2, the motion detector 13 includes four Hall sensors 131 disposed on the upper, lower, left, and right sides of the image capturing unit 11. At this time, the four Hall sensors 131 are provided in parallel with the four fixing device 121 in the same direction.

Here, the four Hall sensors 131 are provided at the outermost part of the image capturing unit 11 when the image capturing unit 11 and the motion detecting unit 13 are integrally provided. When the unit 11 and the motion detector 13 are separated, they are provided in the case of the wireless communication terminal.

In addition, the motion detector 13 reacts with a magnet provided in the autofocus circuit described above with reference to FIG. 1 to sense magnetic force signals having different intensities, converts them into electrical signals, and transfers them to the controller 14. do. Then, the controller 14 controls the position adjusting unit 15 using the signal, thereby correcting the movement caused by the hand shake during image capturing.

Therefore, in the present invention, a magnet that will react with the four Hall sensors 131 is basically required. Accordingly, in the case of the wireless communication terminal having the image capturing unit 11 having no built-in autofocus circuit, a magnet must be separately provided at an external location of the image capturing unit 11 of the terminal. ), The top, bottom, left and right of the magnet.

On the other hand, the position adjusting unit 15 includes four motors 151 provided in the up, down, left and right directions outside the barrel of the image capturing unit 11. At this time, the four motors 151 receive the respective control signals from the control unit 14 and move the image capturing unit 11 in a direction opposite to the movement direction detected by the motion detecting unit 13. .

Herein, an operation process of a wireless communication terminal having a shake correction function when taking an image according to the present invention will be described as an example. At this time, it is assumed that the image capturing unit 11 includes an autofocus circuit therein.

First, when the wireless communication terminal starts to operate in the image capturing mode, the barrel of the image capturing unit 11 is placed at a portion called the origin. After that, when the user presses the autofocus button, the image photographing unit 11 starts focusing in that state. At this time, when the autofocus is a VCM method, an internal actuator moves to send the previewed image data to the controller 14. Then, the control unit 14 sends a signal so that the driver can stop at the position determined to be the best resolution by turning the prepared algorithm.

Then, the driver stops and analyzes the position at this time by four Hall sensors 131. At this time, the four Hall sensors 131 positioned up, down, left, and right measure the strength of the magnetic force transmitted to each position, converts it into an electrical signal, and transmits the value to the controller 14.

Subsequently, the controller 14 analyzes the position of the barrel portion in the focused state using the value and determines it as the reference point (0,0).

When the user presses the shutter to capture the image in a state where the reference point is aligned, the barrel is shaken finely by the shaking of the user. The strength of the magnetic force will be different.

Then, the four Hall sensors 131 converts the strength of the different magnetic force into an electrical signal and transmits it to the controller 14, which receives the controller 14 analyzes the value in real time and moves the barrel by hand shaking. Four motors 151 are controlled to move the barrel in the opposite direction. By doing so, in the wireless communication terminal according to the present invention, camera shake can be corrected during image capturing.                     

Lastly, the present invention is not limited to the wireless communication terminal, but is applicable to a digital camera, a camcorder, a film camera, etc. having a small image photographing unit.

The present invention described above is capable of various substitutions, modifications, and changes without departing from the technical spirit of the present invention for those skilled in the art to which the present invention pertains. It is not limited by the drawings.

As described above, the present invention includes a motion detecting unit for detecting a motion of the image capturing unit to detect a change in the position of the image capturing unit due to hand shaking, and to move the position of the image capturing unit in the opposite direction by using the position adjusting unit. It can be effective.

Accordingly, the present invention has the effect of obtaining a high quality image by correcting the shaking of the image capturing unit during image capturing.

Claims (8)

In a wireless communication terminal, Image capturing means for capturing an image; Support means for supporting the image photographing means; Motion detection means for detecting a motion of the image photographing means and outputting a motion detection signal corresponding thereto; Control means for receiving a motion detection signal from the motion detection means and analyzing the motion detection signal to control the position adjustment means; And The position adjusting means for adjusting the position of the image photographing means according to the control of the control means; Wireless communication terminal having a shake correction function when taking a video including a. The method of claim 1, The video recording means, A lens for acquiring an image; An image conversion sensor converting an image received through the lens into an electrical signal; And A barrel unit surrounding the lens and the image conversion sensor Wireless communication terminal having a shake correction function when taking a video including a. The method of claim 2, The video recording means, Auto focus unit having a magnet inside the barrel portion Wireless communication terminal having a shake correction function when taking a video further comprising. The method according to any one of claims 1 to 3, The support means, Multiple fixtures allow small flow Wireless communication terminal having a shake correction function when taking a video including a. The method of claim 4, wherein Each fixing device, Wireless communication terminal having a shake correction function when taking a picture, characterized in that a plurality is provided outside the barrel. The method according to any one of claims 1 to 3, The motion detecting means, A wireless communication terminal having a shake correction function during image capturing, characterized in that it comprises a plurality of Hall sensors for measuring the strength of the magnetic force and converting it into an electrical signal. The method according to any one of claims 1 to 3, The control means, And a position correction means for controlling the position adjusting means to move the image photographing means in a direction opposite to the position of motion detected by the motion detecting means. The method according to any one of claims 1 to 3, The position adjusting means, And a plurality of motors for moving the image photographing means up, down, left, and right.

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