KR101650380B1 - apparatus for displaying 3D image - Google Patents

Abstract

The present invention relates to a stereoscopic image display apparatus having a wide viewing angle and includes an image generating unit including a plurality of pixel lines arranged in the same direction and outputting an image having a plurality of views for each pixel of the pixel line, An image separator for separating the output image into a left eye image and a right eye image, and a shutter unit disposed between the image generating unit and the image separator. The shutter unit includes a plurality of shutter lines arranged along a pixel line of the image generating unit, At least one shutter line is arranged to correspond to one pixel line, and one of at least one shutter line corresponding to one pixel line is opened in synchronization with the image output timing of the image generating section, ), And transmit the image output from each pixel through the open area.

Description

[0001] The present invention relates to a three-

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stereoscopic image display apparatus, and more particularly, to a non-eye-tightening stereoscopic image display apparatus having a wide viewing angle.

Generally, a stereoscopic device displays stereoscopic technology to add depth information to a two-dimensional image. Using this depth information, an image system that allows an observer to feel three-dimensional vibrancy and realism it means.

The apparatus for displaying stereoscopic images uses a principle of generating binocular parallax by providing a two-dimensional left eye image and a right eye image separately for each of the left and right eyes of an observer.

The observer can perceive stereoscopic images by recognizing the left eye image and the right eye image provided by the stereoscopic image display device through the eyes of the two eyes respectively.

In particular, such a stereoscopic image can be implemented so that a large number of people can view the stereoscopic image at the same time as a movie theater, and various techniques have been developed.

As an example of the developed technique, a stereoscopic image system in which a left eye image and a right eye image are divided by two projectors respectively and is projected on a screen in a movie theater, and an observer can view a stereoscopic image using polarized glasses is developed There is a bar.

In this case, however, not only must the two projectors be synchronized in time, but they must go through a complicated and costly process of aligning the two images on the screen so that they are properly positioned.

Therefore, it is necessary to develop a new technology that can realize a stereoscopic image with a simple and low cost.

It is an object of the present invention to provide a stereoscopic image display apparatus capable of enlarging a viewing angle of a displayed stereoscopic image by arranging a shutter unit between the image generating unit and the image separating unit and increasing the number of views with the same number of pixels .

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are not intended to limit the invention to the precise forms disclosed. .

The stereoscopic image display apparatus according to the present invention includes an image generator including a plurality of pixel lines arranged in the same direction and outputting an image having a plurality of views for each pixel of the pixel line, And a shutter unit disposed between the image generating unit and the image separating unit, wherein the shutter unit includes a plurality of shutter lines arranged along a pixel line of the image generating unit, One or more shutter lines are arranged to correspond to one pixel line, and one of the at least one shutter lines corresponding to one pixel line is opened in synchronization with the image output timing of the image generating unit, It is possible to transmit an image output from each pixel through the image sensor.

Here, the number of shutter lines of the shutter portion is larger than the number of pixel lines of the image generating portion, and one pixel line of the image generating portion may be arranged to correspond to a plurality of shutter lines of the shutter portion.

The area of one pixel line of the image generating unit may be the same as the area of a plurality of shutter lines of the corresponding shutter unit.

The width of the pixel line 1 of the image generating unit may be several times larger than the width of one shutter line of the shutter unit.

The shutter unit may be disposed at a predetermined distance from the image generating unit, or may be disposed to be in contact with the image generating unit.

The present invention may further comprise a control unit for controlling the image generating unit and the shutter unit so that the shutter unit is driven in synchronization with the video output timing of the image generating unit.

On the other hand, the present invention includes a plurality of pixel lines arranged in the same direction, each pixel of a pixel line outputs an image having a first view in an odd-numbered frame, and a second view in an even- An image separator for separating the output image into a left eye image and a right eye image; and a shutter unit disposed between the image generator and the image separator, wherein the shutter unit comprises: Wherein the plurality of shutter lines are arranged so that two shutter lines correspond to one pixel line and are synchronized with the image output timing of the image generating unit to correspond to one pixel line Either one of the two shutter lines is opened and the image having the first view or the second view output from the pixel through the opened shutter line Splurge can kill.

Here, each of the pixels of the image generating unit may alternately output the image having the first view and the image having the second view for every frame.

Other objects, features and advantages of the present invention will become apparent from the detailed description of embodiments with reference to the accompanying drawings.

The stereoscopic image display apparatus according to the present invention has the following effects.

Since the shutter unit is disposed between the image generating unit and the image separating unit, the number of views can be increased to a larger number of views than the existing number of viewpoints. Therefore, the viewing angle of the displayed stereoscopic image is enlarged to improve the quality of the stereoscopic image .

FIGS. 1A to 1D are views for explaining the principles of a non-eye-tightening stereoscopic image implementation;
2 is a view showing a stereoscopic image display apparatus according to the present invention.
Fig. 3 is a view showing the shutter unit of Fig. 2
4A and 4B are views for explaining a driving method of a stereoscopic image display apparatus according to the present invention.
5A and 5B are views showing the operation of the shutter unit of FIG. 4B
6 is a view showing a stereoscopic image display apparatus according to another embodiment of the present invention

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The present invention relates to a non-eye-tightening stereoscopic image display apparatus capable of widening a viewing angle by attaching a separate shutter to a front surface of a base panel.

1A is a view for explaining the basic principle of a stereoscopic image, and FIG. 1B is a view for explaining the principle of a stereoscopic image in which a left eye image and a right eye image are separated by a lens, 1C is a view showing an eight-eye stereoscopic image system in which a left eye image and a right eye image are separated by a lens, and FIG. 1D is a view showing an image flipping phenomenon in an implemented stereoscopic image Fig.

Generally, in the non-eye-hardened stereoscopic image-forming method, as shown in FIG. 1A, light emitted from a light source A is focused on B by a lens.

In other words, if the distance between B1 and B2 is made to be the distance between the left and right eyes of a person (about 65mm) and the eyes are aligned with the positions of B1 and B2, only the light of A1 can be seen in the left eye of the person, Only the light of A2 can be seen.

Therefore, if different image information is displayed on the left and right eyes of a person, a person can feel a stereoscopic effect, and stereoscopic images can be realized without using special glasses such as conventional polarized glasses and shutter glasses.

Thus, a display panel is manufactured by making a large number of pairs of A1 and A2, and a plurality of hemispherical cylindrical lenses corresponding to the pair of A1 and A2 are arranged to manufacture a lenticular screen. Then, The non-eyeglass stereoscopic image display apparatus can be realized.

1B, when a lenticular screen is disposed on the entire surface of a display panel displaying a plurality of left eye images L1-LN and a plurality of right eye images R1-RN, the left eye image and the right eye image are separated, Reaches the left eye of the person, and the right eye image reaches the right eye of the person, so that a stereoscopic image can be realized.

In order to display such a stereoscopic image in a more realistic manner, a display panel is manufactured so that a plurality of images having different views are displayed, and a corresponding lenticular screen is disposed, Multiple images can be viewed.

FIG. 1C shows an eight-eye stereoscopic image system, in which 8 pieces of image information such as a, b, c, d, e, f and g correspond to one convex lens of a lenticular screen.

In this case, the human eye can see different image information depending on the position. For example, when the left eye and the right eye of a person come to the positions g 'and h', respectively, h video information.

Thus, when the position of the human eye is sequentially changed, the human eye can see eight different kinds of images.

However, such a stereoscopic image system having a multi-view has a disadvantage in that horizontal resolution is reduced because various types of images must be displayed.

That is, the resolution of the stereoscopic image system having nine viewpoints is reduced to about 1/9.

In order to produce a stereoscopic image system that realizes such a multi-view, first, the shape of the lenticular lens should be designed, the number of views to be implemented must be determined, and the number of pixels of the display according to the number of views must be determined.

However, as shown in FIG. 1D, a stereoscopic image system realizing multi view realizes a stereoscopic image in a stereoscopic viewing angle area, but when an actual viewer moves, an image flipping phenomenon in which a stereoscopic image is inverted occurs, It gives an unpleasant feeling to.

Therefore, in order to improve the stereoscopic image quality of the stereoscopic image system, it is most important to widen the stereoscopic viewing angle.

That is, when the unit stereoscopic viewing angle is widened, the discontinuous area appearing between the displayed unit stereoscopic image areas is reduced, thereby reducing image flipping phenomenon.

In order to realize a stereoscopic image having a wide viewing angle, the number of pixels of the display panel must be large.

This is because the number of pixels of the display panel is closely related to the number of views when viewing a stereoscopic image.

That is, as the number of pixels of the display panel increases, the number of views that can be implemented increases, and as the number of views increases, the viewing angle of the stereoscopic image increases.

However, since increasing the number of pixels of the display panel has a limitation in manufacturing the display panel, the present invention proposes a method that can indirectly increase the number of pixels of the display panel instead of directly increasing the number of pixels.

2, the present invention includes an image generating unit 100, an image separating unit 300, a shutter unit 200, a controller 500 ).

Here, the image generating unit 100 is a liquid crystal display panel and includes a plurality of pixel lines arranged in the same direction.

In addition, each pixel line includes a plurality of pixels, and each pixel of the pixel line can output an image having a plurality of views according to a control signal of the controller 500.

That is, the image generating unit 100 of the present invention does not output an image having the same view every frame in one pixel, but controls driving to output an image having a different view in units of frames from one pixel.

For example, in a case where the image generating unit 100 is driven at about 120 Hz, an image having a first view is output in one pixel, an image having a second view is output in a second frame, , The image having the first view can be output repeatedly in the third frame, and the image having the second view can be alternately outputted in the fourth frame.

In other words, the image generating unit 100 is controlled to output an image having a first view in an odd-numbered frame and an image having a second view in an even-numbered frame.

Here, in one pixel, the shutter lines of the shutter unit 200 can be determined according to the number of views that can be output at a certain frame interval.

This will be described in more detail later.

As described above, each pixel of the image generating unit 100 can output an image having a different view repeatedly for each one frame or for a plurality of frames according to a design.

The image separating unit 300 separates the image output from the image generating unit 100 into a left eye image and a right eye image by a predetermined distance apart from the front of the image generating unit 100, And may display the images 400 having the same size.

Here, the image separating unit 300 may use a lenticular lens sheet, and one unit lens of the lenticular lens sheet may be arranged to correspond to four pixels of the image generating unit 100.

In this case as well, the number of pixels of the unit image corresponding to one unit lens of the lenticular lens sheet may be varied according to the design.

The shutter unit 200 is disposed between the image generating unit 100 and the image separating unit 300 and is driven in synchronization with the video output timing of the image generating unit 100 in accordance with a control signal of the controller 500. [ .

The shutter unit 200 includes a liquid crystal panel and may be spaced apart from the image generating unit 100 or may be disposed to be in contact with the image generating unit 100.

3, the shutter unit 200 includes two glass substrates 231, a transparent electrode 233, and an alignment film (not shown) on each glass substrate 231. [ 235 are formed in this order, and a liquid crystal 237 is filled between the two alignment films 231.

The shutter unit 200 having such a structure can transmit or block the light incident on the shutter unit 200 by changing the arrangement of the liquid crystal molecules by applying or not applying power to the transparent electrode 233 .

Here, the shutter unit 200 includes a plurality of shutter lines arranged along a pixel line of the image generating unit 100.

And, at least one or more shutter lines may be arranged to correspond to one pixel line.

For example, as shown in FIGS. 5A and 5B, two shutter lines, that is, even-numbered shutter lines and odd-numbered shutter lines may be arranged to pass through each pixel region of the image generating section 100, The above shutter lines may be arranged.

In this manner, the shutter unit 200 having a plurality of shutter lines can open any one of the at least one shutter lines corresponding to one pixel line in synchronization with the video output timing of the image generating unit 100, And transmit the image output from each pixel through the open area.

That is, in response to the control signal from the control unit 500, the shutter unit 200 opens only one of the plurality of shutter lines corresponding to one pixel and blocks the remaining shutter lines. Can be transmitted through the open shutter line area.

Therefore, the number of shutter lines of the shutter unit 200 is greater than the number of pixel lines of the image generator 100, and one pixel line of the image generator 100 is formed of a plurality of shutter lines of the shutter unit 200 May be arranged to correspond to the dogs.

In addition, it is preferable that the area of one pixel line of the image generating unit 100 is formed to be equal to the area of a plurality of shutter lines of the corresponding shutter unit 200.

The width of the pixel line 1 of the image generating unit 100 may be several times larger than the width of one shutter line of the shutter unit.

FIGS. 4A and 4B are views for explaining a method of driving the stereoscopic image display apparatus according to the present invention, wherein FIG. 4A shows a viewing angle when a shutter is not provided, and FIG. 4B shows a viewing angle when a shutter is provided Giving.

Here, for the sake of convenience of description, for example, only four pixels of the image generating unit 100 and only one unit lens of the image separating unit 300 are represented.

First, as shown in FIG. 4A, in the absence of a shutter, the image generating unit 100 outputs an image having a first view to a first pixel to implement an image of the first frame, Outputs an image having a second view to a pixel, an image having a third view to a third pixel, and an image having a fourth view to a fourth pixel.

The image generating unit 100 repeatedly outputs the image having the first view to the first pixel and the image having the second view to the second pixel so as to repeatedly implement the image of the second frame And outputs the image having the third view to the third pixel and the image having the fourth view to the fourth pixel.

That is, the image generating unit 100 of FIG. 4A outputs only images having the same view of each pixel every frame.

Accordingly, images having four kinds of views output from the image generating unit 100 are separated and displayed by the lens of the image separating unit 300. At this time, the images transmitted through the lens have a unit solid angle, However, since the viewing angle of the displayed image is narrow, it does not provide a satisfactory image quality.

4B, when the shutter unit 200 is provided, the image generating unit 100 outputs the image having the first view to the first pixel in order to implement the image of the first frame, Outputs an image having the third view to the second pixel, an image having the fifth view to the third pixel, and an image having the seventh view to the fourth pixel.

In order to implement the image of the second frame, the image generating unit 100 outputs an image having a second view to the first pixel, an image having a fourth view to the second pixel, Outputs an image having a sixth view to the pixel, and outputs an image having the eighth view to the fourth pixel.

Then, the image generating unit 100 outputs the images in the same manner as the first frame in the third frame, and outputs the images in the same manner as the second frame in the fourth frame.

That is, the image generation unit 100 of FIG. 4B repeatedly outputs an image having a different view for each odd-numbered frame or even-numbered frame.

Next, in the odd frame, the shutter unit 200 opens the shutter of the odd line and blocks the shutter of the even line so that the image having the odd-numbered view output from each pixel is transmitted through only the shutter of the odd line.

In the even-numbered frame, the even-numbered line shutter is opened and the odd-numbered line shutter is blocked so that the image having the even-numbered view output from each pixel is transmitted through only the shutter of the even-numbered line.

5A and 5B are diagrams showing the operation of the shutter unit of FIG. 4B. FIG. 5A is a view showing that the odd line and the even line of the shutter unit 200 are turned on, and FIG. (ON) of the shutter unit 200 and turns off the even line (OFF).

As shown in FIGS. 5A and 5B, the odd-numbered line shutter and the even-numbered line shutter are arranged so as to correspond to each pixel region of the image generating unit 100.

That is, the shutter lines of the shutter unit 200 are arranged in the same direction along a pixel line having a plurality of pixels arranged in one direction.

The even-numbered line shutter and the odd-numbered line shutter may be arranged in parallel so as to correspond to one pixel line.

Accordingly, the area of one pixel line of the image generating unit 100 may be equal to the area of two shutter lines of the corresponding shutter unit, and the width of one pixel line of the image generating unit 100 may be equal to the width of one shutter line of the shutter unit. It can be made twice as big as the other.

As described above, the present invention provides images having different views for at least one frame in one pixel, and can be provided to the image generating unit 100 having the same number of pixels as the conventional one by the on / off operation of the shutter line , It is possible to provide an image having a larger number of views than in the prior art, so that the unit solid angle becomes larger, and the viewing angle of the stereoscopic image becomes wider, thereby improving the quality of the image.

Further, according to another embodiment of the present invention, the image generating unit 100 may be arranged so that two or more shutter lines correspond to each pixel line.

6, three shutter lines 200a, 200b, and 200c (see FIG. 6) are provided for each pixel line of the image generating unit 100, and FIG. 6 is a diagram illustrating a stereoscopic image display apparatus according to another embodiment of the present invention. May correspond to each other.

The image generating unit 100 outputs an image having a first view to a first pixel and an image having a fourth view to a second pixel in order to implement an image of a first frame, Outputs an image having the seventh view, and outputs an image having the tenth view to the fourth pixel.

In order to implement the image of the second frame, the image generating unit 100 outputs an image having the second view to the first pixel, an image having the fifth view to the second pixel, Outputs an image having an eighth view to the pixel, and outputs an image having the eleventh view to the fourth pixel.

The image generating unit 100 outputs an image having the third view to the first pixel and an image having the sixth view to the second pixel in order to implement the image of the third frame, Outputs the image having the ninth view to the pixel, and outputs the image having the twelfth view to the fourth pixel.

Then, the image generating unit 100 outputs the images in the same manner as the first frame in the fourth frame, outputs the images in the same manner as the second frame in the fifth frame, and outputs the images in the third frame, And outputs images in the same manner.

The image generating unit 100 of FIG. 6 outputs an image in which each pixel has a different view every three frames.

The shutter unit 200 is disposed so that three shutter lines 200a, 200b, and 200c correspond to each pixel line of the image generating unit 100. [

Therefore, in the first frame, the first shutter line 200a is opened and the second and third shutter lines 200b and 200c are shut off, so that the first, fourth, seventh, and tenth views To be transmitted through the first shutter line 200a alone.

In the second frame, the second shutter line 200b is opened, the first and third shutter lines 200a and 200c are shut off, and the second, fifth, eighth, and eleventh views So that the image having the first shutter line 200a is transmitted only through the second shutter line 200b.

Next, in the third frame, the third shutter line 200c is opened, the first and second shutter lines 200a and 200b are blocked, and the third, sixth, ninth, and twelfth views To be transmitted through only the third shutter line 200c.

6, the area of one pixel line of the image generating unit 100 may be the same as the area of three shutter lines of the corresponding shutter unit, and the width of one pixel line of the image generating unit 100 may be Can be made three times larger than the width of one shutter line of the shutter portion.

As described above, the present invention provides images having different views for at least one frame in one pixel, and can be provided to the image generating unit 100 having the same number of pixels as the conventional one by the on / off operation of the shutter line , It is possible to provide an image having a larger number of views than in the prior art, so that the unit solid angle becomes larger, and the viewing angle of the stereoscopic image becomes wider, thereby improving the quality of the image.

That is, in order to increase the viewing angle, the number of views of the image must be increased. In order to increase the number of views of the image, the number of pixels capable of implementing them must be increased.

Therefore, since it is considerably difficult to increase the number of pixels indefinitely in practice, the present invention has an effect of increasing the number of pixels of the display panel by disposing a liquid crystal shutter having a simple structure on the front surface of the display panel .

As described above, the pitch of the liquid crystal shutter may be designed so as to correspond to a half or less of the pixel pitch of the display panel, and the designed liquid crystal shutter may be turned on / off only.

By turning on / off only the shutter corresponding to the frame of the liquid crystal shutter so as to synchronize with the video output timing of the display panel, the number of views is increased and the viewing angle is expanded.

As described above, according to the present invention, since the shutter unit is disposed between the image generating unit and the image separating unit, the number of views can be increased to a larger number of views than the existing number of pixels, There is an effect to be improved.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. Therefore, the technical scope of the present invention should not be limited to the contents described in the embodiments but should be determined according to the claims.

Claims (14)

A stereoscopic image display apparatus for displaying an image having a plurality of views,
An image generating unit including a plurality of pixel lines arranged in the same direction, each pixel of the pixel line outputting an image having a different view for every two frames including a first frame and a second frame;
An image separator for separating the output image into a left eye image and a right eye image; And,
And a shutter unit disposed between the image generating unit and the image separating unit,
Wherein the shutter unit includes a plurality of shutter lines arranged along a pixel line of the image generating unit, wherein the plurality of shutter lines are arranged so that two shutter lines correspond to each pixel line, and the image output timing of the image generating unit , One of the two shutter lines corresponding to one pixel line is opened and an image having different views output from the pixel through the opened shutter line is transmitted Dimensional image display device. The stereoscopic image display apparatus of claim 1, wherein the image generating unit and the shutter unit are configured by a liquid crystal panel, and the image separating unit is configured by a lenticular lens sheet. The stereoscopic image display apparatus of claim 1, wherein the number of shutter lines of the shutter unit is greater than the number of pixel lines of the image generating unit. delete The stereoscopic image display apparatus according to claim 1, wherein an area of one pixel line of the image generating unit is equal to an area of two shutter lines of the corresponding shutter unit. The stereoscopic image display apparatus of claim 1, wherein a width of one pixel line of the image generating unit is two times larger than a width of one shutter line of the shutter unit. The stereoscopic image display apparatus of claim 1, wherein the shutter unit is spaced apart from the image generating unit. The stereoscopic image display apparatus of claim 1, wherein the shutter unit is disposed to be in contact with the image generating unit. 2. The image processing apparatus according to claim 1,
In order to implement the image of the first frame, an image having a first view is output to a first pixel, an image having a third view is output to a second pixel, and an image having a fifth view Outputs the image having the seventh view to the fourth pixel,
In order to realize the image of the second frame, an image having the second view is output to the first pixel, an image having the fourth view is output to the second pixel, and an image having the sixth view is displayed on the third pixel And outputs the image having the eighth view to the fourth pixel. The method according to claim 1,
Further comprising a control unit for controlling the image generating unit and the shutter unit so that the shutter unit is driven in synchronization with a video output timing of the image generating unit. A stereoscopic image display apparatus for displaying an image having a plurality of views,
Wherein each pixel of the pixel line includes a plurality of pixels arranged in the same direction, each pixel of the pixel line including a first frame, a second frame, and a third frame, Generating unit;
An image separator for separating the output image into a left eye image and a right eye image; And,
And a shutter unit disposed between the image generating unit and the image separating unit,
Wherein the shutter unit includes a plurality of shutter lines arranged along a pixel line of the image generating unit, wherein the shutter lines are arranged such that three shutter lines correspond to each pixel line, and the image output timing of the image generating unit , One of the three shutter lines corresponding to one pixel line is opened and an image having different views output from the pixel through the opened shutter line is transmitted Dimensional image display device. The stereoscopic image display apparatus of claim 11, wherein an area of one pixel line of the image generating unit is equal to an area of three shutter lines of the corresponding shutter unit. 13. The image processing apparatus according to claim 12,
In order to implement an image of the first frame, an image having a first view is output to a first pixel, an image having a fourth view is output to a second pixel, and an image having a seventh view is output Outputs an image having a tenth view to the fourth pixel,
In order to realize an image of the second frame, an image having a second view is output to the first pixel, an image having the fifth view is output to the second pixel, and an image having the eighth view is output Outputs an image having an eleventh view to the fourth pixel,
Then, in order to implement the image of the third frame, the image having the third view is outputted to the first pixel, the image having the sixth view is outputted to the second pixel, And outputs the image having the twelfth view to the fourth pixel. The stereoscopic image display apparatus of claim 11, wherein a width of the pixel line of the image generating unit is three times larger than a width of one shutter line of the shutter unit.

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