KR100277962B1 - Image processing device of video camera - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image processing apparatus of a video camera, wherein a front end of a barrel master is horizontally moved by a pair of piezoelectric elements in order to repeatedly move the position of an image formed on the light receiving surface of a solid-state image pickup device by one pitch. And / or a first high-definition unit which is moved in parallel in the vertical direction, and in front of the solid-state imaging device, a second rotating in the front and rear and / or the left and right directions by the first and second piezoelectric elements to widen the image recognition range of the subject. By providing a high-quality unit, the fixed lens and the optical lower pass filter are moved horizontally and vertically in parallel or rotated back and forth or horizontally around the optical axis of the incident light incident from the subject, thereby increasing the Images of resolution and high resolution image quality can be obtained.

Description

Image processing device of video camera

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image processing apparatus of a video camera. More particularly, the fixed lens and the optical lower pass filter are driven horizontally, vertically, and / or in front, rear, left, and right directions to improve resolution and color resolution from a low resolution solid-state image pickup device. An image processing apparatus of a video camera capable of obtaining a high quality image.

In general, an image processing apparatus such as a camcorder or a projection television using a low resolution solid state image pickup device such as a charge coupled device (CCD) is an apparatus for capturing images, recording them on a recording medium, and reproducing the recorded images. In the conventional image processing apparatus, as shown in FIG. 1, a lens barrel 12 having a lens unit 10 mounted at a tip thereof is provided, and the magnification of light incident from a subject is enlarged within the lens barrel 12. And / or a zoom lens 14 for reducing the linear movement is provided, and the barrel master 16 is coupled to the rear of the lens barrel 12.

An aperture (iris) 18 is mounted between the lens barrel 12 and the barrel master 16 so as to adjust the amount of light incident from the subject, and the fixed lens 20 and the zoom lens 14 inside the barrel master 16. A focusing lens 22 is formed which moves the light in the same direction and speed as an image, and focuses incident light on the light receiving surface. The zoom lens 14 and the focusing lens 22 are operated by a linear motor. Then, on the rear side of the barrel master 16, a solid-state image pickup device 26 including an optical low pass filter 24 is fixed.

In the conventional image processing apparatus configured as described above, the incident light incident from the subject passes through the lens portion 10 of the lens barrel 12 and passes through the zoom lens 14 linearly moved by the linear motor. Or reduced and formed on the light-receiving surface of the solid-state imaging device 26 through the fixed lens 20, the focusing lens 22, and the optical lower pass filter 24 while adjusting the amount of incident light by the aperture 18. .

Thereafter, the formed incident light is converted into a digital image signal via an electrical signal from the solid-state image pickup device 26, and the digital image signal is stored in the field memory while scanning the pixels again, and then outputted at the field frequency and recorded and reproduced. The device (not shown) records the image.

However, since the solid-state imaging device fixed to the barrel master as described above is formed on the semiconductor chip, resolution and chromatic aberration are not only lowered, but also have a disadvantage of lowering resolution.

In order to solve the above disadvantages, the resolution of the solid-state imaging device can be increased by integrating many light-receiving elements in the light-receiving region, but there is a problem in that economic costs increase as the semiconductor design and manufacturing burden increases.

The present invention is to solve the above problems, an object of the present invention is to move the fixed lens and the optical lower pass filter in a horizontal, vertical direction or parallel to or around the optical axis of the incident light incident from the subject, The present invention provides an image processing apparatus of a video camera capable of obtaining images of high resolution and high resolution from a low resolution solid-state image pickup device by rotating in the left and right directions.

1 is a cross-sectional view schematically showing a conventional image processing apparatus;

2 is a cross-sectional view showing an image processing apparatus of a video camera according to the present invention;

3 is a front view showing first driving means for driving the fixed lens applied in the image processing apparatus according to the present invention in a vertical and / or horizontal direction;

4 is an enlarged cross-sectional view of a main portion of the first driving means shown in FIG. 3;

5A is a view showing an image formed on the light receiving surface when the first driving means according to the present invention is not driven;

5B and 5C show an image when the first driving means of FIG. 5A is driven in the horizontal direction;

5D and 5E show an image when the first driving means of FIG. 5A is driven in the vertical direction,

FIG. 6 is a front view showing second driving means for driving the solid-state image sensor to be applied to the image processing apparatus according to the present invention in front and rear and / or left and right directions;

7 is a cross-sectional view A-A of the second driving means shown in FIG. 6;

8A is a view showing an image formed on the light receiving surface when the second driving means according to the present invention is not driven;

8B to 8D show an image when the second driving means according to the present invention is driven in the front, rear, and / or left and right directions with respect to FIG. 8A;

9 is a view showing a high quality image obtained by synthesizing the images of FIGS. 8A to 8D.

Explanation of symbols on the main parts of the drawings

40, 50: first and second high definition units 42: fixed lens

44,54: 1st and 2nd bobbin 46: leaf spring

52: optical lower pass filter 56: bracket

58 ball 60 piezoelectric element

62,64: first and second piezoelectric elements

A feature of the present invention for achieving the above object is a barrel master coupled to the lens barrel with the lens unit and the lens barrel and the diaphragm provided between the lens barrel and the barrel master, and fixed to the barrel master An image processing apparatus of a video camera comprising a low-resolution solid-state image pickup device in which incident light incident from a subject is formed on the light receiving surface, wherein the image is provided at the tip of the barrel master to form an image on the light receiving surface of the solid-state image pickup device. A first high definition unit for repeatedly moving the position of the first high definition unit by one pitch: first driving means for selecting and moving the first high definition unit in one of a vertical axis direction and a horizontal axis direction; A second lens for widening the image recognition range of the subject formed on the light receiving surface of the solid-state image sensor; Image quality unit; And second driving means for moving the image formed on the image forming surface of the solid-state imaging device by rotating the second high quality unit in the xy direction. / P>

According to the present invention, the first high definition unit includes a fixed lens, a first bobbin in which the fixed lens is fixed in the center, and a leaf spring in which both ends are fitted to the extension protrusions of the first bobbin and the barrel master, respectively. It is characterized by including.

According to the present invention, the first driving means, one end is fixed to the extension projection of the barrel master, the other end is fixed to the first bobbin and is deformed by a voltage applied from the outside to the first high-definition unit Characterized in that the pair of piezoelectric elements to move in the vertical or horizontal direction.

According to the present invention, the second high quality unit is disposed around the optical lower pass filter provided between the focusing range and the solid-state image sensor, the second bobbin positioned around the optical lower pass filter, and the second bobbin. A plurality of brackets coupled to the barrel master and positioned between the second optical bobbin and the second optical bobbin and between the second bobbin and the bracket, respectively, and being a rotation point of the optical lower pass filter and the second bobbin. It is characterized by containing the dog ball.

According to the present invention, the second drive means, the first end is fixed to the barrel master and the other end is the first bobbin to rotate the second bobbin including the optical lower pass filter to the second bobbin on the horizontal axis bamboo A piezoelectric element and a second piezoelectric element, one end of which is fixed to the barrel master and the other end of which is fixed to the optical lower pass filter, rotates the optical lower pass filter around a vertical axis.

Hereinafter, a preferred embodiment of an image processing apparatus of a video camera according to the present invention will be described in detail with reference to the accompanying drawings.

2 is a view showing an image processing apparatus according to the present invention, wherein the image processing apparatus includes a lens barrel 12 having a lens portion 10 mounted at its tip and a barrel master 16 and a lens coupled to a rear side thereof. A diaphragm 18 is provided between the barrel 12 and the barrel master 16 to adjust the amount of light incident from the subject, and a low resolution solid-state imaging device 26 fixed to the barrel master 16.

Inside the lens barrel 12 and the barrel master 16, a zoom lens 14 for enlarging or reducing the magnification of incident light and a focusing lens 22 moving in the same direction and speed as the zoom lens 14 are linear motors. (Not shown) is mounted so as to be linearly movable, and the first high-definition unit moves the position of the image formed on the light receiving surface of the solid-state imaging element 26 by one pitch at the tip of the barrel master 16. 3 and 4 are provided as shown in Figs. 3 and 4, wherein the first high definition unit 40 is provided for moving the first high definition unit 40 in parallel in a horizontal or vertical direction on a plane orthogonal to the optical axis of the incident light. The first drive means 60 is coupled.

In front of the solid-state image pickup device 26, a second high definition unit 50 is installed as shown in FIGS. 6 and 7 for repetitively shifting the position of the image formed on the light receiving surface by a half pitch (0.5) to widen the recognition range of the image. And second driving means (62, 64) are coupled to the second high definition unit (50) for rotating the second high quality unit (50) around a horizontal or vertical axis passing through a center on a plane perpendicular to the optical axis of the incident light. do.

The first high definition unit 40 includes a fixed lens 42, a first bobbin 44 having the fixed lens 42 fixed to the center, and an extension protrusion 16a of the first bobbin 44 and the barrel master 16. It consists of a leaf spring 46 which is fitted to both sides thereof.

The second high definition unit 50 includes an optical lower pass filter 52 provided between the focusing lens 22 and the solid state image pickup device 26 and a second bobbin 54 positioned outside the optical lower pass filter 52. In order to rotate the second bobbin 54 in left and right directions, the bracket 56 coupled with the barrel master 16 and the optical lower pass filter 52 and the second bobbin 54 are moved forward and backward and / or in left and right directions, respectively. It is provided with a ball 58 which becomes a central axis so as to rotate.

As the first driving means 60, one end is fixed to the inner surface of the barrel master, the other end is fixed to the first bobbin 44, and is deformed and contracted by a voltage applied from the outside. A pair of piezoelectric elements 60 moving in the vertical or horizontal direction

As the second drive means (62, 64), one end is fixed to the barrel master (16) and the other end is fixed to the second bobbin 54, the second bobbin including the optical lower pass filter (52) (54) The first piezoelectric element 62 for rotating the light around the horizontal axis, and the second piezoelectric element 64 having one end fixed to the barrel master 16 and the other end rotating the optical lower pass filter 52 around the vertical axis. Is used.

As the first and second driving means, a voice coil motor or a stamping motor may be used. In the present invention, piezoelectric elements are used to realize miniaturization of the image processing apparatus.

An operation of the image processing apparatus of the video camera according to the present invention configured as described above will be described in detail with reference to FIGS. 5A to 5E and 8A to 9.

The incident light incident from the subject is enlarged or reduced at a high magnification according to the linear movement of the zoom lens 14 while passing through the lens unit 10 and the zoom lens 14, and the light amount is adjusted by the aperture 18. 1 passes through the fixed lens 42 of the high-quality unit (40).

When incident light passing through the fixed lens 42 is focused by the focusing lens 22 and is imaged on the light-receiving surface of the solid-state imaging device 26 via the optical lower pass filter 52, the solid-state imaging device 26 may generate this. After converting the image signal into an electrical signal, the initial image as shown in FIG. 5A is stored in the field memory.

After that, when a voltage is applied to the horizontal piezoelectric element 60, the first bobbin 44 including the fixed lens 42 moves in parallel with the optical axis of the incident light incident from the subject, while moving in a horizontal direction. The positions of the images incident on the light receiving surface of Fig. 26 are moved by one pitch as shown in Figs. 5B and 5C, respectively, and the formed images are stored.

When a voltage is applied to the vertical piezoelectric element 60, the first bobbin 44 including the fixed lens 42 moves the incident light in parallel to the optical axis in the vertical direction to change the position of the image. Each image is moved vertically by one pitch as in 5e, and then the image formed image is stored.

Then, a high color resolution image can be obtained from the low color resolution solid-state image pickup device 26 by combining the formed images as shown in Figs. 5A to 5E. That is, the information level of the synthesized chromatic aberration can be increased by about two times or more.

On the other hand, when incident light collected by the focusing lens 22 forms an image on the light-receiving surface of the solid-state image pickup device 26 through the optical lower pass filter 52, the image signal is converted into an electrical signal and then, FIG. 8A. Store the initial image (indicated by x) as in field memory in field memory.

An external voltage is applied to the first piezoelectric element 62 so that the left and right sides of the second bobbin 54 including the optical lower pass filter 52 rotate with the fire 58 built in the upper and lower sides as the rotation point. Or solid-state imaging by applying an external voltage to the second piezoelectric element 64 so that the upper and lower sides of the optical lower pass filter 52 are rotated with the ball 58 embedded in the left and right in the X-axis direction as the rotation support point. The position formed on the light receiving surface of the element 26 is changed.

That is, when the first piezoelectric element 62 is driven in the X-axis direction, as shown in FIG. 8B, the incident light passing through the optical lower pass filter 52 is moved 0.5 pitch horizontally with respect to the initial image x. Is formed on the light-receiving surface of the solid-state imaging device 26, and is converted into a digital image signal as described above (stored in o) and stored in the field memory.

In this state, when the second piezoelectric element 64 in the Y-axis direction is driven, as shown in FIG. 8C, the optical lower pass filter 52 is rotated and is perpendicular to the image o of the incident light by 0.5 pitch again. An image is formed on the light-receiving surface of the moved position, and the image (denoted by W) is stored in the field memory.

Then, when the first piezoelectric element 62 is driven again, as shown in Fig. 8B, an image? Can be obtained, which is 0.5 pitch horizontally shifted with respect to the image W, so that in the field memory storing these images, Each gag outputs images sequentially and synthesizes them to obtain a high quality image having high color resolution and high resolution as shown in FIG. 9.

Therefore, by driving the fixed lens 42 and the optical lower pass filter 52 of the present invention at the same time, a high color resolution and a high resolution image can be obtained from the low resolution solid-state image pickup device 26.

Although in this embodiment, the first high definition unit is moved in parallel and the second high definition unit is rotated, the first high definition unit is rotated and at the same time the second high definition unit is moved in parallel to obtain a high quality image from the solid state image pickup device. Can be made into a configuration.

As described above, according to the video camel image processing apparatus of the present invention, the fixed lens and the optical lower pass filter are horizontally centered on the optical axis of the incident light incident from the subject. High resolution and high resolution image quality can be obtained from a low resolution solid-state image pickup device by moving it in the vertical direction or rotating it in the front, rear, and left and right directions.

The present invention is not limited to the aforesaid embodiment, and in particular, the present invention as claimed in the claims can be variously modified and implemented by those skilled in the art without departing from the gist of the present invention. Such changes will fall within the scope of the claims.

Claims (8)

A lens master equipped with a lens barrel and a barrel master coupled to the rear side of the lens barrel, an aperture provided between the lens barrel and the barrel master, and a low light in which incident light incident on the barrel master is incident on the light receiving surface. An image processing apparatus of a video camera included in a resolution solid-state image pickup device, A first high definition unit installed at the front end of the barrel master to repeatedly move the position of an image formed on the light receiving surface of the solid-state imaging device by one pitch; First driving means for selecting and moving the first high definition unit in one of a vertical axis direction and a horizontal axis direction; A second high definition unit installed in front of the solid-state image pickup device to widen an image recognition range of a subject formed on the light receiving surface of the solid-state image pickup device; And second driving means for rotating the second high definition unit in the XY direction to move an image formed on an image forming surface of the solid-state imaging device. The method of claim 1, wherein the first high-definition unit includes a first spring fixed in the center of the fixed lens and the first spring and the leaf springs, both ends of which are respectively fitted to the extension projections of the first bobbin and the barrel master. An image processing apparatus of a video camera. According to claim 1, wherein the first driving means is fixed to the inner surface of the barrel master, the other end is low and low on the first bobbin and is deformed by a voltage applied from the outside to the first high-definition unit An image processing apparatus of a video camera, characterized in that it is a pair of piezoelectric elements which are moved in one of the vertical axis direction and the horizontal axis direction. The optical high-pass filter provided between the focusing lens and the solid-state image sensor, a second bobbin positioned around the optical lower pass filter, and positioned around the second bobbin. And a bracket coupled with the barrel master. And a plurality of balls respectively positioned between the optical lower pass filter and the second bobbin and between the second bobbin and the bracket to be rotational support points of the optical lower pass filter and the second bobbin. And an image processing apparatus of a video camera. 2. The second driving means according to claim 1, wherein the second driving means comprises: a first end fixed to the barrel master, and the other end rotatably rotating the second bobbin including the optical lower pass filter to the second bobbin around a horizontal axis. And a piezoelectric element; and a second piezoelectric element, one end of which is fixed to the barrel master and the other end of which is fixed to the optical lower pass filter, to rotate the optical lower pass filter around the oscillation axis. Device. The method of claim 1, wherein the first high-definition unit is rotated around one axis of the horizontal axis and the vertical axis, the second high-definition unit is installed so as to be movable in parallel in any direction of the horizontal direction and vertical direction. An image processing apparatus of a video camera. An image processing apparatus of a video camera according to claim 1, wherein said first and second driving means are voice coil motors. An image processing apparatus of a video camera according to claim 1, wherein said first and second driving means are a stepping motor.

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