KR20140052217A - 3d image display device and driving method for the same - Google Patents

Abstract

Provided is a 3D image display device comprising an image display device and a view area dividing unit for dividing the display device into n - four or higher natural number- number of view areas, installed at the front part of the display device. The n number of view areas form a group by being successively arranged in order from a first view area. The group is periodically repeated. Each view area in each group is interlocked with a view area adjacent to each other. The first view area and Nth view area form the border of each group. In the overlapped areas of the first area and second area or Nth area, an image applied to the second view area is applied. Also, in the first view area and N-1st view area overlapped with the Nth view area, an image applied to the N-1st view area is applied.

Description

[0001] The present invention relates to a three-dimensional image display device,

The present invention relates to a 3D image display apparatus, and more particularly, to a 3D image display apparatus capable of improving a 3D image display quality in a view region located at an outermost boundary region in a multi view overlapping structure will be.

2. Description of the Related Art [0002] In recent years, a display device capable of three-dimensional image display has been commercialized in response to an increase in demand for a display device capable of realizing a stereoscopic image and realizing a three-dimensional image.

Generally, three-dimensional images are made by the principle of stereoscopic vision through two eyes. By using binocular disparity, which is caused by the difference in time between two eyes, ie, the distance between two eyes is about 65 mm, A display device capable of displaying an image having a certain size has been proposed.

To describe the 3D image in a more detailed manner, the left and right eyes facing the display device respectively see different two-dimensional images. When these two images are transmitted to the brain through the retina, the brain fuses them exactly to each other, Dimensional depth of the 3D image and the sense of reality of the 3D image. Such a phenomenon is generally referred to as stereography.

As a technique proposed for displaying a three-dimensional stereoscopic image in an apparatus having a two-dimensional image display screen such as a liquid crystal display apparatus, there are a stereoscopic image display by special glasses, a non-stereoscopic stereoscopic image display, and a holographic display system .

The stereoscopic image display system using the double special glasses includes a polarizing glasses system using a vibration direction or a rotation direction of polarized light, a time division spectacle system in which left and right images are alternately presented while being switched to each other, and a system of transmitting light of different brightness in the right and left Can be divided into the concentration difference method.

In the non-eye-hardened stereoscopic image display system, a parallax barrier system in which an image can be separated and observed through a vertical grid-like aperture in front of each image in the right and left eyes, a lenticular method using a lenticular plate in which a cylindrical lens is arranged in a stripe arrangement, and an integral photography method using a fly-eye lens plate.

In the holographic display method, a three-dimensional stereoscopic image having all the factors such as focus adjustment, convergence angle, binocular parallax, and motion parallax, which are three dimensional factors, can be obtained and is classified into a laser light reproduction hologram and a white light reproduction hologram.

Recently, a parallax barrier system, which is a method of realizing a three-dimensional image by allowing a stereoscopic image for left and right eyes to be separately viewed without requiring special special glasses, has recently attracted attention.

1 is a conceptual diagram showing a conventional three-dimensional image display apparatus of a parallax barrier system.

Referring to the drawings, the parallax barrier type three-dimensional image display device 11 includes a 2D image display device 15, for example, a liquid crystal display device, and a display device 15 arranged in a vertical or horizontal direction And a parallax barrier (30) for blocking the image to be incident on the left eye for the user's right eye and for blocking the image to be incident on the right eye for the left eye .

Therefore, by the configuration including the parallax barrier 30, the 3D image can be finally viewed from the display device in which the user displays the 2D image by the binocular parallax.

However, in the 3D image display device 11 having such a parallax barrier 30, the brightness decreases due to the parallax barrier 30 which intentionally blocks the progress of the light, and the viewing angle range for viewing the 3D image is very narrow One problem is occurring.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a 3D image display device capable of realizing a 3D image without deteriorating luminance characteristics by a simple structure and further improving a viewing angle range for viewing 3D images For that purpose.

According to an aspect of the present invention, there is provided a 3D image display device including: an image display device; (N is a natural number of 4 or more) view areas provided on the front surface of the display device and dividing the display device into n view areas, wherein n (n is a natural number of 4 or more) Wherein each of the plurality of view regions is overlapped with the left and right view regions neighboring to each other in each group, and the first view region, the second view region, An image to be applied to the second view area is applied to both the second view area and the nth view area overlapping the first view area in the view area and the nth view area, 1 view region and the (n-1) th view region are applied to the (n-1) th view region.

At this time, the view area separating means includes a plurality of lenticular lenses.

(단 M, N은 자연수, Pa와 Pb는 각각 서브픽셀의 단방향 및 장방향의 피치)의 식으로 표시되는 것이 특징이다. The plurality of lenticular lenses are arranged at a first angle with respect to the longitudinal direction of subpixels included in the display device,

(Where M and N are natural numbers, and Pa and Pb are pitches in the unidirectional and longitudinal directions of the subpixels, respectively).

Preferably, the image display device is a liquid crystal display device or an organic electroluminescent device, and an image to be applied to the first view area to the nth view area is obtained by moving an object from the first angle to a predetermined angle And is an image captured by moving sequentially to the left or right with an angle difference.

The 3D image display apparatus according to the embodiment of the present invention can realize a 3D stereoscopic image without lowering brightness by using a lenticular lens instead of a parallax barrier with a large luminance degradation, have.

Also, in the case of implementing n views, the 3D image display apparatus according to an embodiment of the present invention may include a first view region located in a boundary region and a second view through an n-1 view The 3D image quality is the same as that of the 3D image area. Therefore, the 3D image quality can be improved in all of the first to nth views, and the viewing angle range for viewing 3D images is enlarged.

1 is a conceptual view showing a conventional three-dimensional image display apparatus of a parallax barrier system.
2 is a schematic perspective view of a 3D image display apparatus according to the present invention.
3 is a view showing a superposition structure of nine views in a 3D display device according to a comparative example.
4 is a diagram illustrating a 3D image output to each view area in a 3D image display apparatus having a multiple view area.
5A and 5B are views showing a superposition structure of nine views in a 3D image display apparatus according to an embodiment of the present invention.
FIG. 6 is a photograph of a 3D image viewed from a ninth view region located in a boundary region of a 3D image display apparatus having 9 view driving according to a comparative example. FIG.
FIG. 7 is a photograph of a 3D image display device for driving a 9 view according to an embodiment of the present invention, which captures a 3D image viewed from a ninth view region located in a boundary region. FIG.

Hereinafter, the present invention will be described in more detail with reference to the drawings.

2 is a schematic perspective view of a 3D image display apparatus according to the present invention.

As shown, the 3D image display apparatus 101 according to the present invention includes a display element 120 in which a plurality of sub-pixels R, G, and B are disposed, A lenticular plate 130 including a plurality of lenticular lenses 135 having a predetermined width is formed.

At this time, the display device 120 is preferably a flat panel display device having a light and thin shape, and may be a liquid crystal display device or an organic electroluminescent device, for example.

The liquid crystal display device includes a liquid crystal panel, a polarizing plate provided on the outer surface of the liquid crystal panel, and a backlight unit for supplying a light source to the liquid crystal panel. Here, the liquid crystal panel may include a gate and a data line which define a plurality of sub-pixels and intersect with each other, a thin film transistor connected to the two lines, and a pixel electrode connected to the thin- A color filter substrate including a color filter layer and a common electrode in which red, green, and blue color filter patterns are sequentially repeated corresponding to each subpixel of the array substrate; and a liquid crystal layer interposed between the two substrates do.

The organic electroluminescent device includes an organic electroluminescent diode including a first electrode, an organic light emitting layer, and a second electrode on an array substrate including a gate, a data line, and a thin film transistor, and comprises an opposing substrate encapsulating the organic electroluminescent diode.

The structure of the lenticular plate 130 formed on the front surface of the display device 120 having such a configuration will be described with reference to FIG. (x-direction) of the sub-pixels R, G, B of the lenticular lens 135, and the horizontal (x-direction) And the width w is an integer multiple of the subpixels R, G,

In the 3D image display apparatus 101 according to the embodiment of the present invention having such a configuration, the lenticular plate 130 is provided in place of the parabolic barrier to thereby remove the portion for blocking light incident on the left and right eyes, The brightness of the image is improved.

The 3D image display apparatus 101 according to an embodiment of the present invention having such a configuration is configured such that the lenticular lens 135 provided in the lenticular plate 130 is arranged at a first angle? ) Of the first embodiment.

Accordingly, the number of views for viewing a 3D image can be adjusted by tilting the lenticular plate 130 with respect to the display device 120 displaying the 2D image.

  The first angle? Inclined with respect to the longitudinal direction (y direction) of the subpixels (R, G, B) of the lenticular lens 135 in the lenticular plate 130,

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. Here, Pa is the short axis pitch of the sub-pixels R, G, and B, and Pb is the long axis pitch of the sub-pixels R, G, and B. The M and N are arbitrary natural numbers, (X, y) of the sub-pixels (R, G, B) in the group when a plurality of sub-pixels (R, G, B) G and B in the major axis direction (y direction) of the sub-pixels (R, G and B) and the number of sub-pixels (R, G and B) At this time, it is general that M and N generally satisfy a value of M / N? 2.

For example, in the case of the lenticular plate 130, assuming that the M / N value is 2, the first angle? Is a value obtained by dividing the subpixels R, G, B in the liquid crystal display, , The long axis pitch Pb is about three times the short axis pitch Pa, so that the formula becomes θ = tan ^-1 (1/6) and becomes 9.46 에.

The numbers assigned to the plurality of sub-pixels R, G, and B located in the one group are obtained by inclining the lenticular lens 135 of the lenticular plate 130 at the first angle? The number assigned to each view is the number of sub-pixels (R, G, B) that are displayed when viewing a 3D image in each view area. ).

The 3D image display device 101 according to the embodiment of the present invention having the lenticular plate 130 is effective in terms of brightness enhancement and further enhances the viewing angle for viewing 3D images through an increase in the number of views .

The increase in the number of views is achieved by arranging the lenticular lens 135 provided on the lenticular plate 130 so as to have a predetermined angle with respect to the longitudinal direction (y direction) of the subpixels R, G, And a slanted structure is applied. Application of such a slanted structure can prevent resolution degradation in one direction.

In order to compensate for the luminance fluctuation depending on the position of the display area in such a configuration, the view area is overlapped. Further, in the view area, in the view area, the image of the view area closest to the view area is displayed Is another feature of the 3D image display apparatus according to the embodiment of the present invention.

 FIG. 3 is a view showing a superimposed view area of a 3D display device according to a comparative example, wherein the roman displayed above each view area represents the view area, and the Arabic numerals displayed inside each view area are displayed in each view area And shows images captured by the 3D image display device having multiple views at different angles output to the respective view areas.

In a non-eye-warming 3D image display device provided with a lenticular plate, in the case of overlapping nine views, as shown in the figure, from the ninth view region XI to the first view region I, And from the ninth view area XI to the first view area I constitute one group gr, and such a group gr is periodically repeatedly arranged. At this time, the neighboring view areas have overlapping structures, and the minimum view area distance that does not overlap with each other, that is, the spacing distance between the view areas located one over the other, is about 65 mm, which is the binocular disparity.

At this time, the ninth view area XI in the first view area I is substantially the same as the view area XI shown in FIG. 4 (a diagram schematically showing the 3D image output to each view area in the 3D image display device having the multiple view area) As a result, the user views the image of the view area which does not overlap with each other with the interval between the binocular disparities, and thus the stereoscopic effect is felt.

However, in the 3D image display apparatus to which the 9-view superposition structure is applied, a view area is generated in which the quality level of the 3D image is reduced based on the viewing position of the user.

That is, in the 3D image display device implementing the 9 overlapped views, it is possible to view the 3D image having the same quality level from the eighth view area VIII to the second view area II regardless of the user's viewpoint , And the view area (gr), that is, the first view area (I) and the ninth view area (XI) among the view areas belonging to one view group (gr).

Here, for convenience of explanation, the second view area II to the eighth view area VIII are defined as a normal area, and the first view area I and the ninth view I, which are located at the boundary between the view groups gr, The region IX is defined as a boundary region.

Referring to FIG. 3, on the characteristic of the view area sequentially arranged in the forward direction or the reverse direction in each group (gr), in the normal area, one view area is superimposed on the fourth view area IV And the view area is the fifth view area V and the third view area III.

Therefore, if such a generalization is made, each view region overlapped with each view region located in the normal region becomes the m-1 view and the (m + 1) view region when the reference view region is defined as the m-th view region, The m-th view area and the (m-1) th and (m + 1) th view areas have image differences of one stage (the first spacing angle difference in FIG. 4).

Referring to FIGS. 3 and 4, if an image 1 viewed from a first angle is applied to the first view region I, the second view region II Is applied to an image viewed from a second angle having the smallest spacing angle difference with respect to the first angle, and from the first view region I to the ninth view region IX by this principle, Images sequentially viewed from the first to ninth angles are sequentially applied with a constant spacing angle with respect to the first angle.

Accordingly, even if the fifth view region V and the third view region III are partially overlapped, the fourth image region 4 and the third image region 4, which are applied to the fourth view region IV, And the third and fifth images (3, 5) applied to the fifth view regions (III, V) are viewed from the third and fifth angles, which are the closest angles with the smallest angular difference, The quality of the 3D image is not significantly affected.

However, in the first and ninth view regions I and IX located in the boundary region, images viewed from a very large angle difference are superimposed, thereby reducing 3D image quality.

For example, the first view region I and the eighth view region VIII are partially overlapped with each other in the ninth view region IX located in the boundary region. In this case, The display quality of the 3D image is drastically lowered compared to the normal region because the eighth image 8 viewed from one angle region overlaps.

Therefore, in the case of a 3D image display apparatus having a view area superimposition structure according to a comparative example, in order to view an image having a normal 3D display quality, assuming that it has 9 views as an example, , The first and ninth view regions located in the boundary region become substantially inaccessible due to the deterioration of the 3D image quality, so that the viewing angle range for viewing a normal 3D image is limited.

Therefore, the 3D image display apparatus according to the embodiment of the present invention is capable of preventing the degradation of the 3D image quality and the decrease of the 3D viewing angle in the boundary region of the 3D display device according to the comparative example having the 9 view overlapping structure It is another feature to include.

5A and 5B are views showing overlapping views of nine views in a 3D image display apparatus according to an embodiment of the present invention, which show first and ninth view regions located in a boundary region and regions overlapping the first and ninth view regions, respectively , Roman characters displayed on the top of each view area indicate the view area, and Arabic numerals displayed inside each view area indicate information on the image displayed in each view area. In the 3D image display device having multiple views, An image obtained by photographing an object at different angles of output is shown. Here, the view area of the comparative example is also shown for comparison with the view area of the 3D image display device according to the comparative example.

As shown in the figure, assuming that the 3D image display device according to the embodiment of the present invention has nine views, the configuration of the normal region is the same as that of the 3D image display device according to the comparative example A view having a one-step difference with respect to the region is arranged, and in the first and ninth view regions located in the boundary region, the view region overlapping with the view region is divided into a view region .

More specifically, the view region overlapping the first view region I is substantially the second view region II and the ninth view region IX, but the view overlapping with the first view region I The ninth image photographed in the ninth angle region (see Fig. 4) is not actually applied to the ninth view region IX having a large number of view differences among the regions, as in the comparative example, The second view region is disposed by driving the second image 2 photographed in the second angle region (see FIG. 4) applied to the second view region II that is closest to the first view region I And have the same configuration.

In the ninth view area IX, which is another view area located in the boundary area in the same manner, the overlapping view area is the eighth view area VIII and the first view area I, (8) photographed in an eighth angle region (see FIG. 4) applied to the eighth view region (VIII) is applied to the first view region (I) The view overlapped with the region IX as a reference and the view positioned on both sides thereof is an eighth view region.

Generally, in a 3D image display apparatus having n (n is a natural number of 4 or more) views from a first view region to an nth view region and having overlapping configurations between neighboring view regions, In the first view region, a second image applied to the second view region is applied to both the second and nth view regions overlapping the first view region. In the nth sub region, 1 view region applied to the (n-1) th view region is applied to both the (n-1) th view region and the first view region which are adjacent to each other.

In the 3D image display apparatus according to the embodiment of the present invention, when it is assumed that the 3D image display apparatus is operated in the 9 view mode by the driving characteristics as described above, the first view region I and the ninth view region IX The first and ninth view regions I and IX are formed in the ninth view and the second view region overlapping the first and ninth view regions I and IX and the eighth view and the first view region, And the second and eighth images (2, 8) applied to the second view region (II) and the eighth view region (VIII) respectively closest to the view region are respectively applied to the view region located in the normal region, The same 3D image quality can be watched from the first view region I to the ninth view region 9.

Therefore, the 3D image display apparatus according to the embodiment of the present invention expands the viewing angle range for 3D viewing compared to the 3D image display apparatus according to the comparative example, and also has a view region located in the normal region in the view region located in the boundary region, It is possible to view a 3D image having the same level of image quality.

FIG. 6 is a photograph of a 3D image viewed from a ninth view region located in a boundary region of a 3D image display apparatus having a 9 view driving according to a comparative example. FIG. In a 3D image display apparatus that performs a 3D image display in a boundary region. All of these photographs are designed so that only the sub-pixel associated with the ninth view and the view overlapping with the view is normally driven, and gray for the sub-pixel related to the remaining view area.

Referring to FIG. 6, in the case of the 3D image display apparatus according to the comparative example, the eighth view region is substantially overlapped with the eighth view region in the ninth view region, which is a boundary region, Since the image viewed in the first area is displayed on the second area 5, the image of the image that is substantially viewed by the user is remarkably deteriorated by superimposing the image with the very large difference in the angle of the separation of the object. It can be seen from the drawing that a severe blur phenomenon occurs in which the object is doubly overlapped.

Referring to FIG. 7, in the 3D display device according to the embodiment of the present invention, the ninth view region, which is a boundary region, substantially overlaps the eighth and first view regions, The first and eighth view regions overlapping with the ninth view region by applying the image to the eighth view region having the smallest spacing angle and the image applied to the ninth view region, It is understood that the image difference in the second to eighth view regions located in the normal region is the level of the degree of difference of the image difference between the reference region and the overlap region and thus a 3D image having a relatively good image quality is expressed . It can be seen that the blurring phenomenon in which the objects are superimposed on the drawing is hardly generated as compared with the blurring phenomenon in Fig. 6 according to the comparative example.

The present invention is not limited to the above-described embodiments, and various modifications may be made without departing from the spirit of the present invention.

I, VIII, IX: 1st, 8th and 9th view areas
1: an image photographed in the first angular region (as an image to be applied to the first view region)
8: (an image to be applied to the eighth view region) An image photographed in the eighth angle region
9: (an image to be applied to the ninth view region) An image photographed in the ninth angular region

Claims (6)

An image display element;
A view area separating unit provided on the front surface of the display unit and configured to divide the display device into n view areas,
Wherein the n (n is a natural number of 4 or more) view areas are sequentially arranged from the first view area to the n-th view area to form a group, the group is periodically repeated, and each group A second view area overlapped with the first view area in a first view area and an nth view area overlapping with the left and right view areas neighboring the first view area and the second view area, th view area and the (n-1) th view area are overlapped with the n-th view area, the image applied to the (n-1) And the 3D image display device.
The method according to claim 1,
Wherein the view region separation means is a lenticular plate including a plurality of lenticular lenses.
The method according to claim 1,
Wherein the plurality of lenticular lenses are disposed at a first angle with respect to the longitudinal direction of subpixels included in the display device.
The method of claim 3,
The first angle

(Where M and N are natural numbers, and Pa and Pb are the pitches of the unidirectional and longitudinal directions of the subpixels, respectively)
Of the 3D image display device.
The method according to claim 1,
Wherein the image display device is a liquid crystal display device or an organic electroluminescent device.
The method according to claim 1,
Wherein the image to be applied to the first view area to the nth view area is an image photographed by moving the object to the left or right sequentially with a predetermined angle difference from the first angle on the basis of the first angle, Video display device.

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