KR20150025895A - Apparatus for displaying stereo-scopic images in glassless mode - Google Patents

Abstract

The present invention relates to a device for displaying a stereoscopic image in a glassless manner and, more specifically, to a glassless stereoscopic image display device which has a line-to-pixel type pixel array and is implemented in multi-view mode. Many people can watch the display device at the same time. The display device forms mosaic portions with invertible left-eye and right-eye images at upper, lower, left, and right pixels from a boundary of a multi-view which is an erroneous area where an inverse image is formed. When the inverse image is acknowledged in the erroneous area by using eye tracking, the inverse image inverting device is operated to invert the image outputted through the mosaic portion. According to the invention, more than one people can watch at all positions respective normal stereoscopic images without an erroneous area where the left-eye image and the right-eye image are swapped with each other.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a stereoscopic image display device,

The present invention relates to an apparatus for displaying a stereoscopic image in a non-eyeglass system, and more particularly, to an apparatus for displaying a stereoscopic image in a non-eyeglass system. More specifically, Eye stereoscopic image display apparatus capable of viewing in a non-eyeglass mode.

In general, the distance between the two eyes is called interocular. A person's nail is about 65mm. The left eye and the right eye observe different images slightly when viewing an object. This is called binocular disparity. Man feels stereoscopic because of this binocular disparity.

Most techniques for realizing stereoscopic images use binocular disparity. These technologies give the left eye a time lag in both eyes by presenting the left eye image (left eye image) and the right eye image (right eye image).

There are glasses system and non-glasses system in which the left eye image and the right eye image are separated and presented to each of the left eye and right eye. Of these, the non-eyeglass system includes a parallax barrier system and a lenticular system.

According to the parallax barrier method, a barrier filter is disposed in front of the image panel. Through the barrier filter, the left eye sees the left eye image and the right eye sees the right eye image. Prior arts related to the parallax barrier method include Korean Patent Laid-Open Publication No. 2005-0098493 and Korean Laid-Open Patent Publication No. 2006-0072078.

In the parallax barrier system, if a device for releasing the parallax barrier is not attached, there is a problem that the pixels are reduced in view of the stereoscopic image, resulting in deterioration of the image quality. The parallax barrier system can realize a stereoscopic image only at a predetermined narrow range of distances and angles even when viewing a stereoscopic image, and there is a problem that a so-called crosstalk phenomenon occurs when the distance or the angle is out of the range. The crosstalk phenomenon is a phenomenon in which the right eye image is seen in the left eye or the left eye image is seen in the right eye.

According to the parallax barrier method, when the viewing distance is long like a TV, the angle of the binocular parallax is small. Therefore, in order for the left eye and the right eye to view the left eye image and the right eye image, respectively, the distance between the image panel and the barrier filter must be increased. Accordingly, the parallax barrier system has a problem that the display apparatus becomes thick.

In addition, when a dynamic viewpoint is implemented according to the parallax barrier method, the total number of pixels for each of the plurality of viewpoints is reduced to a value obtained by dividing the total number of pixels constituting the image panel by the number of viewpoints. Therefore, there is a problem that the resolution is reduced when the dynamic viewpoint is implemented according to the parallax barrier method.

According to the lenticular method, a lens plate is disposed in front of the image panel. The lens plate is a lenticular screen in which semi-cylindrical convex lenses are vertically arranged. The width of the convex lens corresponds to twice or more the width of the pixel. The left eye image and the right eye image are separated by a lens plate. Prior arts related to the lenticular method include Korean Patent Laid-Open Publication No. 2007-0001528 and Korean Laid-Open Patent Publication No. 2008-0027559.

The red (R) sub-pixel, the green (G) sub-pixel and the blue (B) sub-pixel constituting the pixel are generally arranged in the lateral direction side by side. In the lenticular method, A phenomenon occurs in which the color of some subpixels is unable to form an image on the lens plate. Accordingly, there is a problem that the displayed image quality is lowered and the viewer can easily recognize the phase spread phenomenon caused by the lens.

In addition, when a multinature viewpoint is implemented by a lenticular method, the size of the convex lens is further increased, so that the phenomenon of spreading the phase also becomes more serious.

In order to overcome this phase spreading, a method of vertically arranging R subpixels, G subpixels, and B subpixels may be considered, but since this method increases the cost of manufacturing the image panel, It causes burden.

Generally, a viewer views not only a stereoscopic image but also a stereoscopic image through a display. However, when viewing a stereoscopic image through a lenticular-type display, a lenticular image spreads. As a prior art for resolving the phase spread of non-stereoscopic images, there is Korean Patent No. 10-0449056.

This prior art introduces a lenticular comprising a liquid crystal and an electrode for controlling the liquid crystal. In this prior art, when a stereoscopic image is viewed, a voltage is applied to an electrode so that a liquid crystal becomes a lenticular shape, thereby enabling a stereoscopic image to be viewed. When viewing an image of a stereoscopic image, a voltage is not applied to the liquid crystal, Thereby enabling viewing of a non-stereoscopic image without a phenomenon.

However, according to this prior art, the phase-spreading phenomenon occurs when the stereoscopic image is viewed in the same manner as the conventional lenticular method, and the manufacturing cost is greatly increased. In addition, the lenticular of the electrode application method has a disadvantage in that crosstalk is increased at the time of viewing the stereoscopic image because the accuracy is lowered as compared with the lenticular of the optical lens system.

In addition, in the case of implementing the dyne point according to the lenticular method, there is a problem that the phase expansion phenomenon becomes more severe, and the resolution is reduced as the total number of pixels for each of the multiple viewpoints is decreased as in the parallax system .

The parallax barrier method and the lenticular method, which are non-spectacles method, are generally applied when pixels output images in a space division manner. In the spatial division method, a part of pixels output a left eye image and the rest of pixels output a right eye image. That is, in the spatial division method, both the left eye image and the right eye image are output through only a part of all the pixels. Accordingly, the parallax barrier method and the lenticular method have a problem that the resolution is fundamentally lowered when the stereoscopic image is implemented.

In order to solve this problem, the present applicant has disclosed a patent application No. 2013-0065626 which solves the problem of resolution degradation by outputting a left eye image and a right eye image in a time division manner through a plurality of pixels arranged in a matrix form .

In order to solve the crosstalk phenomenon, the applicant of the present invention has disclosed a patent application No. 2012-0010934 which combines a lenticular lens and a lattice shutter to realize a stereoscopic image display of a multi-viewpoint type while preventing resolution degradation We have also been racing to make efforts.

However, when multi-view is implemented for two or more viewers, when viewer A and viewer B accidentally look at the same point between the left eye of viewer A and the viewer B, the viewer A should view the left image In this case, since the viewer B sees the left image rather than the right image, the viewer B sees an abnormal image, such as a reversed image (a phenomenon in which the left eye image and the right eye image change), a non-stereoscopic image, The problem of feeling is derived.

In this case, since the viewers A and B all look at the same point, there is a limit that can not be solved even if a left or right eye image is output by a grid shutter or a time division method.

For example, in the case of multi-view, a multi-view is constituted by grouping by a certain standard. The above-described problem mainly occurs at the boundary portion of the multi-view.

In particular, if a reversed phase occurs, viewer B may be accompanied by dizziness (nausea) and vomiting, thus urgent improvement is required.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems in the prior art, and it is an object of the present invention to provide a stereoscopic image display system, in which two or more dynes can watch stereoscopic images in a non- Eye stereoscopic image display apparatus capable of realizing a stereoscopic-free stereoscopic image without an ideal image to all viewers by preventing the left and right sides of the images viewed by the respective viewers from changing even if the viewer sees the same point by chance. There is a purpose.

The present invention provides a non-eyeglass stereoscopic image display apparatus having a pixel array of a line-to-line system and being implemented in a multi-view mode, the apparatus comprising: Forming a mosaic portion capable of reversing the image of the left eye image and the right eye image in the upper, lower, left, and right pixels around the boundary of the multi-view which is an abnormal region in which a reversed phase occurs; Eye stereoscopic image display apparatus, wherein when a reversed phase is detected in an ideal region through eye trekking, the reversed-phase reversing apparatus is driven to invert the image output through the mosaic unit.

At this time, the abnormal region exists in a ratio of a certain distance according to the size of the multi-view and the distance between viewers.

According to the present invention, it is possible to obtain an effect that two or more dynes can accurately watch their normal stereoscopic images without causing a reversed phase in which an abnormal region, particularly a left eye image and a right eye image, are reversed at all points.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exemplary diagram showing a basic concept for explaining the present invention. FIG.
FIG. 2 is an exemplary view for explaining the concept of a display for realizing a non-eyeglass stereoscopic image according to the present invention.
3 is a partial perspective view of the lens portion of Fig.
FIG. 4 shows an overcoat layer added to FIG.
FIG. 5 is an exemplary view illustrating an embodiment of a display for realizing a non-eyeglass stereoscopic image according to the present invention.

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

Before describing the present invention, the following specific structural or functional descriptions are merely illustrative for the purpose of describing an embodiment according to the concept of the present invention, and embodiments according to the concept of the present invention may be embodied in various forms, And should not be construed as limited to the embodiments described herein.

In addition, since the embodiments according to the concept of the present invention can make various changes and have various forms, specific embodiments are illustrated in the drawings and described in detail herein. However, it should be understood that the embodiments according to the concept of the present invention are not intended to limit the present invention to specific modes of operation, but include all modifications, equivalents and alternatives falling within the spirit and scope of the present invention.

As shown in FIG. 1, when an audience A and a viewer B watch a panel with a certain distance from each other, they accidentally look at the same point, and thus an abnormal region including a reverse phase in which a left eye image and a right eye image are reversed Based on what is happening.

At this time, the present invention is based on the concept shown in FIGS. 2 to 4, which will be described later, and its multi-view implementation.

1, for example, a 55-inch TV is tested on the basis of the viewer A and the distance from the viewer B to the viewer B, that is, the viewing distance on the right side. As a result, have.

This is an abnormal region occurring when the viewer views the panel in the non-eyeglass stereoscopic image apparatus, which is implemented in a multi-view according to the viewing distance to the right direction, by accidentally viewing the same point. In the illustrated test, (Between the left eye image and the right eye image, when viewed from the viewpoint of the viewer A on the basis of the viewer A) between 1000 and 400 mm, and between 400 and 500 mm and between 600 and 700 mm, And if it exceeds 1500mm, it can be confirmed that it is completely distorted.

As a result, when viewer B is considered on the basis of viewer A, an abnormal phenomenon such as a reverse phase occurs only at a specific point and a normal image is implemented at the remaining points. Therefore, when the multi view is implemented, the boundary is divided into bundle units This phenomenon is presumed to occur at the boundaries of the compartment.

Accordingly, the present inventor has focused on a known eye-tracking technique and a mosaic arrangement to detect a specific point when it is viewed.

For this technical implementation, the basic technology as shown in FIG. 2 to FIG. 4 is assumed as a basic premise.

Referring to FIG. 2, the non-eyeglass stereoscopic image display device 200 is mounted on the front surface of the image panel 100.

The image panel 100, which is an existing premise of the present invention, includes a plurality of pixels arranged in a matrix form. The image panel 100 outputs the left eye image and the right eye image in a time division manner through a plurality of pixels. In the time division method, all the pixels sequentially output the left eye image and the right eye image.

Each of the pixels is composed of an R (Red) subpixel, a G (Green) subpixel, and a B (Blue) subpixel. The light output from each sub-pixel is transmitted through the color filter to have a corresponding color. The R subpixel, the G subpixel, and the B subpixel are arranged in the horizontal direction to form one pixel.

As the image panel 100, a general LCD, an LED, and an OLED can be used. For example, the image panel 100 may include a first liquid crystal part 110, a first transparent sheet layer 120, and a first polarizer plate 130.

The first liquid crystal unit 110 includes a first pixel 111 and a second pixel 112. Although the image panel 100 outputs an image through a plurality of pixels, only the first pixel 111 and the second pixel 112 adjacent thereto are illustrated as an example among the plurality of pixels for convenience of description in FIG. 1 .

Pixels 111 and 112 are composed of subpixels of each color. That is, the first pixel 111 is composed of R sub-pixel 111-1, G sub-pixel 111-2 and B sub-pixel 111-3 arranged side by side, and the second pixel 112 Is composed of an R subpixel 112-1, a G subpixel 112-2, and a B subpixel 112-3 arranged side by side in the horizontal direction.

The pixels 111 and 112 are filled with liquid crystals between electrodes for applying a voltage to each sub-pixel. In the subpixel to which the voltage is applied, the arrangement of the liquid crystal changes. Light passing through the liquid crystal in this state is diffracted. The images of the pixels 111 and 112 are formed by collecting light transmitted through RGB sub-pixels.

The first transparent sheet layer 120 is disposed between the first liquid crystal part 110 and the first polarizer plate 130. The first transparent sheet layer 120 is inserted to adjust the interval between the first liquid level portion 110 and the non-eyeglass stereoscopic image display device 200. When the image panel 100 is implemented using a typical LCD, the first transparent sheet layer 120 corresponds to a color filter glass substrate.

The first polarizer 130 linearly polarizes the light transmitted through the first liquid crystal part 110. A desired image is obtained by transmitting the light transmitted through the first liquid crystal part 110 to the first polarizing plate 130. [ When the image panel 100 is implemented using a general LCD, the first polarizer 130 corresponds to a polarizer attached to the color filter glass substrate.

The non-eyeglass stereoscopic image display apparatus 200 includes an optical pattern unit and a lens unit. The optical pattern portion includes a second liquid crystal portion 210, a second polarizer plate 220, and a second transparent sheet layer 230. The lens portion includes a base layer 240 and a lens column array 250.

The lens column array 250 is a lens column 251 repeatedly arranged. The cross section of the lens column 251 is an oblong or oval shape. That is, the lens column 251 is a convex lens implemented in the form of a column.

In this specification, the term 'width' means the length in the transverse direction in the section of FIG. The width of the lens column 251 is smaller than or equal to the width of the sub pixels 111-1 to 3 and 112-1 to 3, respectively. The width of the lens column 251 illustrated in Fig. 1 is equal to the width of the sub pixels 111-1 to 3, 112-1 to 3, respectively.

In this specification, the 'vertical' direction refers to the direction perpendicular to the section of FIG. 1, and the 'height' refers to the length in the direction perpendicular to the section of FIG. The height of the lens column 251 corresponds to the height of the row of subpixels.

Since the width of the lens column 251 is smaller than or equal to the widths of the sub pixels 111-1 to 3 and 112-1 to 3, the lens column 251 is provided in the lens portion for each portion corresponding to each sub- Can be arranged. Accordingly, a convex lens can be disposed in the lens portion for each portion corresponding to each of all the sub-pixels.

If the width of the lens column 251 is greater than the width of the sub-pixels 111-1 to 3, 112-1 to 3, some sub-pixel columns may not have a corresponding lens column 251. However, even in this case, if the width of the lens column 251 is 130% or less of the widths of the sub pixels 111-1 to 3 and 112-1 to 3, The lens column 251 can be disposed. Accordingly, the lens portion may be provided with a convex lens for each portion corresponding to each of the most sub-pixels.

In order to minimize the Moire effect caused by the arrangement of the lens column array 250 and the image panel 100, the lens column 251 is divided into sub-pixels 111-1 to 3 and 112- 1 to 3). That is, the lens column 251 is formed such that an angle at which the moiré phenomenon is minimized between the longitudinal center axis of the lens column 251 and the longitudinal center axis of the sub pixels 111-1 to 3, 112-1 to 3 is formed And can be arranged obliquely with respect to the subpixels 111-1 to 3 and 112-1 to 3, respectively. Preferably, the angle is greater than 0 DEG and less than 60 DEG. More preferably, the angle is not less than 6 degrees and not more than 15 degrees.

As a result of the experiment conducted by the inventors of the present invention, if the width of the lens column 251 is 130% or less even if it is greater than the width of the sub pixels 111-1 to 3 and 112-1 to 3, ) Were arranged in a diagonal line, it was confirmed that there was almost no difference in resolution in visual observation.

When the width of the lens column 251 exceeds 130% of the widths of the sub pixels 111-1 to 3 and 112-1 to 3, the number of sub pixel columns having no corresponding lens column is further increased . As the number of such subpixel columns increases, the resolution decreases.

The lens columns 251 are coated on the base layer 240 to form the lens column array 250. The base layer 240 is made of a transparent film such as a PET film or a transparent glass plate. The base layer 240 can be omitted if the lens column array 250 can be mounted on the spectacle-free stereoscopic image display device 200 without the base layer 240. [

The light transmitted through the lens column 251 is refracted according to the refractive index and incident angle of the lens column. However, since the angle of refraction is not large, light transmitted through the lens column 251 is shown as a straight line in FIG. 1 for convenience.

FIG. 3 is a partial perspective view of the lens portion of FIG. 2, in which lens columns 251 coated on the base layer 240 form a lens column array 250. The lens column array 250 is in the form of a lenticular lens.

Referring to FIG. 4, an overcoat layer 260 may be added to the front surface of the lens column array 250. FIG. The overcoat layer 260 is used to adjust the focal length of the lens column array 250. An AN coated PET film (not shown) may be attached to the front surface of the overcoat layer 260.

As such, the focal length of the lens column array 250 can be adjusted by overcoating. The focal length of the lens column array 250 can also be adjusted by employing a lens column 251 having a suitable refractive index.

The focal length of the lens column array 250 is adjusted so that the second liquid crystal section 210 is positioned in the vicinity of the focal distance of the lens column array 250. [ For example, the focal length of the lens column array 250 is adjusted to correspond to a distance of 0.5 to 1.5 times the distance from the lens column array 250 to the second liquid crystal section 210. Preferably, the focal length of the lens column array 250 is adjusted to correspond to the distance from the lens column array 250 to the second liquid crystal section 210.

The lens column array 250 may be arranged so that the convex surface of the lens column 251 faces the image panel 100 without facing the viewer. Further, the lens column having both front and rear convex surfaces may form an array of lens columns.

Referring again to FIG. 2, the optical pattern portion is disposed between the lens portion and the image panel 100. As described above, the optical pattern portion includes a second liquid crystal portion 210, a second polarizer plate 220, and a second transparent sheet layer 230.

The second liquid refiners 210 are composed of a first isotropic ITO film layer, a first alignment film, a liquid crystal layer, a second alignment film, and a second isotropic ITO film layer.

The first isotropic ITO film layer is patterned by ITO sputtering after the isotropic film is antiblocking coated. As the isotropic film, any film having a retardation value (R0) of X-Y axis of 20 or less and being close to optically isotropic and having a sheet resistance of 150 [? /?] Or less by coating a transparent electrode may be used. For example, as the isotropic film, an isotropic polycarbonate film, a cycloolefin film, a polyisobutylene film and the like can be used. The patterning is performed such that the pattern units 219 are arranged in a matrix form.

The first alignment layer is coated on the front surface of the first isotropic ITO film layer. The liquid crystal layer is coated on the front surface of the first alignment layer. The second alignment layer is coated on the back surface of the layer of the second isotropic ITO film and the layer of the second isotropic ITO film coated with the second alignment layer is coated on the front surface of the liquid crystal layer. Thus, the second alignment film is located on the front surface of the liquid crystal layer. A second transparent sheet layer 220 is attached to the front surface of the second isotropic ITO film layer.

As described later, the liquid crystal layer functions to block or transmit light. The first alignment film and the second alignment film may be omitted if the liquid crystal layer can provide such a function without the first alignment film and the second alignment film.

As described above, the second liquid crystal part 210 is filled with liquid crystal between the first isotropic ITO film layer and the second isotropic ITO film layer. A liquid crystal display in the form of TFT-TN, TFT-VA, TFT-IPS, TN, OCB, ECB, PDLC or STN may be used to implement the second liquid crystal unit 210, .

Pattern units 219 arranged in a matrix form are formed in the second liquid crystal part 210 according to patterning of the first isotropic ITO film layer. The width of the pattern unit 219 is equal to or smaller than 1/2 N of the width of the lens column 251 (N is the number of viewpoints) and less than or equal to 1 / 2N of the width of the sub pixels 111-1 through 3.

The number of viewpoints (N) means the number of viewers who can simultaneously view stereoscopic images. For example, if the number of viewpoints (N) is 2, it means that there are two viewers who can view the stereoscopic images at the same time. That is, if the number of viewpoints (N) is 2, it means that a two-point point is provided.

1, the width of the pattern unit 219 is set to be 1/2 of the width of the lens column 251, for example, when the non-eyeglass stereoscopic image display apparatus 200 provides two view points for the viewers A and B, 4 and smaller than or equal to 1/4 of the width of the sub pixels 111-1 to 3, 112-1 to 3, respectively.

The width of the pattern unit 219 is equal to or greater than 1/8 of the width of the lens column 251 and the width of the sub-pixel 111 -1 to 3, and 112-1 to 3, respectively.

The height of the pattern unit 219 is set to correspond to the height of the sub-pixels 111-1 to 3 and 112-1 to 3, respectively. That is, the height of the pattern unit 219 is set to match or approximate to the heights of the sub-pixels 111-1 to 3 and 112-1 to 3, respectively.

The first isotropic ITO film layer and the second isotropic ITO film layer are used as an electrode for applying a voltage for each pattern unit 219. The second liquid crystal unit 210 has a voltage applying unit (not shown) that can apply a voltage to each of the pattern units 219 through these electrodes.

When a voltage is applied to specific pattern units through the voltage applying part electrode, the liquid crystal array changes in each part corresponding to the pattern units in the liquid crystal layer. In the left eye image (L) or the right eye image (R) transmitted through the liquid crystal layer in this state, a phase change by 1/2 lambda occurs.

The liquid crystal array does not change with respect to pattern units to which no voltage is applied. The phase change does not occur in the left eye image L or the right eye image R transmitted through the liquid crystal layer in this state.

The second polarizer 220 is disposed between the second liquid crystal part 210 and the lens part. The second polarizer 220 linearly polarizes the image transmitted through the second liquid crystal part 210. The images transmitted through the second solution unit 210 are classified into two types. One type is an image transmitted through a voltage applied pattern unit and the other type is an image transmitted through a pattern unit where no voltage is applied. There is a phase difference of ½λ between two types of images. Due to this phase difference, only one of the two types transmits through the second polarizing plate 220, and the remaining kind is blocked by the second polarizing plate 220.

For example, an image transmitted through a pattern unit in which no voltage is applied is transmitted through the second polarizer 220, and an image transmitted through a pattern unit in which a voltage is applied is blocked by the second polarizer 220. In this case, the pattern unit to which the voltage is not applied forms the light-transmitting portion of the optical pattern portion, and the pattern unit to which the voltage is applied forms the light-shielding portion of the optical pattern portion.

As described above, each of the pattern units arranged in a matrix form in the second liquid crystal unit 210 forms a light shielding portion or a light transmitting portion of the optical pattern portion. The light-shielding portion and the light-transmitting portion are different in the arrangement of the liquid crystal in the second liquid crystal portion 210. In the optical pattern portion, an optical pattern composed of the light-shielding portions and the light-transmitting portions is formed.

The second transparent sheet layer 230 is disposed between the lens portion and the second liquid portion 210. The second polarizer 220 is disposed on the front surface of the second liquid crystal part 210 and the second transparent sheet layer 230 is disposed on the front surface of the second polarizer 220. [ However, the position of the second polarizer 220 and the position of the second transparent sheet layer 230 may be interchanged. That is, the second transparent sheet layer 230 may be disposed on the front surface of the second liquid crystal unit 210, and the second polarizer plate 220 may be disposed on the front surface of the second transparent sheet layer 230.

The thickness of the second transparent sheet layer 230 is adjusted by arranging the second transparent sheet layer 230 between the lens part and the second liquid level part 210 so that the distance between the lens part and the second liquid level part 210 Can be adjusted.

The thickness of the second transparent sheet layer 230 is set such that the left eye line of the binocular line passing through the lens column array 250 and directed to the sub pixels 111-1 to 3 and 112-1 to 3 is the second liquid crystal unit 210, And the distance between the portion reaching the second liquid level portion 210 and the line of sight of the right eye correspond to the width of the pattern unit.

On the other hand, the optical pattern formed on the optical pattern portion passes through the lens columnar array 250 and passes through the left eye line or the right eye line toward the sub pixels 111-1 to 3 and 112-1 to 3 selectively through the binocular parallax Or blocked. Such an optical pattern includes a first optical pattern and a second optical pattern.

The first optical pattern is formed such that the left eye line passes through the lens columnar array 250 and passes through the sub pixels 111-1 through 3 and 112-1 through 3 and the right eye line is blocked. For this selective blocking, the second liquid crystal unit 210 is provided with a light-transmitting portion in a portion of the binocular visual line toward each of the subpixels 111-1 to 3 and 112-1 to 3 that reaches the left eye line, Shielding portion is disposed in the portion.

The second optical pattern is formed so that the right eye line is passed and the left eye line is blocked as opposed to the first optical pattern. For this selective blocking, the second liquid crystal unit 210 is provided with a light-transmitting portion in a portion where the right eye line reaches the right eye among the binocular eyes toward each of the sub pixels 111-1 to 3 and 112-1 to 3, Shielding portion is disposed in the portion. That is, the pattern units forming the light transmitting portion in the first optical pattern form the light shielding portion in the second optical pattern, and the pattern units forming the light shielding portion in the first optical pattern form the light transmitting portion in the second optical pattern.

The distance between the portions where the binocular lines toward the sub pixels 111-1 to 3 and 112-1 to 3 reach the second liquid crystal unit 210 through the lens columnar array 250 corresponds to the width of the pattern unit It is possible to selectively block any one of the binocular eyes directed to the subpixels 111-1 to 3 and 112-1 to 3 by forming the light transmitting portion in one of the adjacent pattern units and forming the shielding portion in the other pattern unit . The pair of the light-transmitting portion and the light-shielding portion adjacent to each other thus forms a sub-pattern constituting the entire optical pattern.

If two adjacent pattern units constituting the subpattern are referred to as a first pattern unit and a second pattern unit, the right eye line reaches the second pattern unit when the left eye line reaches the first pattern unit. It is possible to pass the left eye line and block the right eye line as in the first optical pattern by using the sub pattern in which the light transmitting portion is formed in the first pattern unit and the light shielding portion is formed in the second pattern unit and the light shielding portion is formed in the first pattern unit It is possible to pass the right eye line and block the left eye line as in the second optical pattern by using the sub pattern in which the light transmitting portion is formed in the second pattern unit.

The second liquid crystal unit 210 functions as a Polymer Network Liquid Crystal (PNLC) type switchable display shutter. When the pattern units to which the voltage is applied are changed in the second solution unit 210, the optical pattern formed in the optical pattern unit is also changed. On this basis, the optical pattern portion alternately forms the first optical pattern and the second optical pattern.

As described above, all the pixels of the image panel 100 sequentially output the left eye image and the right eye image. When the left eye image is output from the image panel 100, a first optical pattern is formed in the optical pattern portion, 100, the second optical pattern is formed in the optical pattern portion. In other words, when the first optical pattern is formed in the optical pattern portion, the left eye image is output from the image panel 100, and when the second optical pattern is formed in the optical pattern portion, the right eye image is output from the image panel 100 .

Preferably, this conversion between the first optical pattern and the second optical pattern occurs at least 60 times per second. As a result, the viewer can view the stereoscopic image without reduction in resolution.

In the case where the non-eyeglass stereoscopic image display apparatus 200 provides a dyne point of view of two or more viewpoints, the optical pattern formation is performed in consideration of the viewpoints at each of the multiple viewpoints. For example, if the number N of viewpoints is 2 as shown in FIG. 1, the left eye line and the right eye line of the viewer A located at any one of the two viewpoints and the left eye line and the right eye line of the viewer B located at the remaining one The optical pattern is formed.

More specifically, the optical pattern includes at least N sub-patterns for each portion corresponding to a convex lens for each sub-pixel. The convex lens by subpixel means a portion corresponding to each of the subpixels 111-1 to 3 in the lens column array 250. [

For example, as shown in FIG. 1, when the number N of viewpoints is 2, at least two subpatterns are included for each portion corresponding to a convex lens for each subpixel. However, the sub pattern of the first optical pattern and the sub pattern of the second optical pattern are different from each other in the positions of the light shielding portion and the light transmitting portion. For example, if the subpattern of the first optical pattern has a transmissive portion formed on the right side of the light-shielding portion on the left side, the subpattern of the second optical pattern has the light-shielding portion on the right side of the transmissive portion on the left side.

In the optical pattern, there are at least two pattern units for each portion corresponding to the convex lens for each subpixel. Accordingly, at least one subpattern may be included for each portion corresponding to the convex lens for each subpixel. When at least four pattern units exist for each portion corresponding to a subpixel convex lens, at least two subpaths may be included for each portion corresponding to a convex lens for each subpixel, have.

Due to such an optical pattern, even when the non-eyeglass stereoscopic image display apparatus 200 provides a point-in-time, all the sub-pixels constituting the image panel can be provided for each of the multi-view points. Therefore, even when the non-eyeglass stereoscopic image is viewed, it can be realized without degrading the resolution. The viewer located in each of the multiple viewpoints can independently view the stereoscopic image.

Preferably, the number of the multiple viewpoints is 10 or less. This takes into account the ease and cost of manufacturing the optical pattern portion. If these issues are not a problem, the number of multiple viewpoints may exceed ten.

If there is no lens in the non-eyeglass stereoscopic image display device 200, the line of sight of the viewer will reach the second lens unit 210 as it is. Then, the line of sight of the viewer will span a wider range than the width of the pattern on the second selecting unit 210. [ Accordingly, when the left eye image is output from the image panel 100 at the time of being positioned on the side other than the front side, when the left eye image is displayed on the right eye as well as on the left eye, or when the right eye image is outputted from the image panel 100, A phenomenon in which a right eye image can be seen may occur.

However, the lens unit reduces the area of the viewer's line of sight to the second lens unit 210. [ Since the focal length of the lens column array 250 preferably corresponds to the distance from the lens column array 250 to the second liquid crystal part 210, the lens part is such that the line of sight of the viewer remains in the second liquid crystal part 210 But not the focus.

Even if the focal length of the lens column array 250 does not coincide with the distance from the lens column array 250 to the second liquid crystal section 210 but is close to the distance from the lens column array 250 to the second liquid crystal section 210 The area is significantly reduced. For example, even if the focal length of the lens column array 250 is between 0.5 and 1.5 times the distance from the lens column array 250 to the second liquid crystal unit 210, The area of the portion reaching the portion 210 is remarkably reduced.

As a result, the above-described phenomenon does not occur in the non-eyeglass stereoscopic image display device 200 when there is no lens section. Further, the distance and angle at which stereoscopic images can be viewed can be formed over a wide range.

Since the width of the pattern unit is less than or equal to 1 / 2N of the width of the subpixel, however, since the second liquid crystal unit 210 is located near the focal length of the lens column array 250, It is possible to selectively block the eyes of the user.

If there is no optical pattern on the non-eyeglass stereoscopic image display device 200, the left eye image will be displayed on both the left and right eyes of the viewer when the left eye image is outputted from the image panel 100, The right eye image will be seen in both the left and right eyes of the viewer. This is because the lens columnar array 250 can not separate the pixel-by-pixel image because the width of the lens column 251 is smaller than or equal to the width of the sub-pixels 111-1 to 3, 112-1 to 3.

However, the optical pattern formed on the optical pattern portion is selectively passed through the lens columnar array 250 and left-eye or right-eye lines toward the sub-pixels 111-1 to 3 and 112-1 to 3 due to binocular parallax Or blocked. Accordingly, the above-described phenomenon does not occur in the non-eyeglass stereoscopic image display device 200 when there is no optical pattern portion.

Since the convex lens having a width less than or equal to the width of the subpixel is disposed for each portion corresponding to the subpixel, the color of all the subpixels may be reflected on the lens portion even if the convex lens effect occurs. This can prevent the phase spreading phenomenon in the conventional lenticular method.

The second transparent sheet layer 230 may be omitted if a necessary distance between the lens portion and the second liquid level portion 210 can be secured without the second transparent sheet layer 230. [

As described above, the second liquid crystal unit 210 functions as a PNLC (Polymer Network Liquid Crystal) type switchable display shutter, and the optical pattern formed in the optical pattern unit is variable. Thus, it is possible to detect the position of the viewer with the camera and form the optical pattern to fit the sensed positions.

Even when a viewer moves, it is possible to detect the position after moving to the camera and change the optical pattern to be suitable for the position after the movement. For example, when the left eye image is outputted from the image panel 100 at the position after the movement, the left eye image may be displayed not only in the left eye but also in the right eye, It is possible to do.

In the case of viewing a general image rather than a stereoscopic image, the optical pattern unit may configure only the optical pattern as a light emitting unit by applying no voltage to any pattern unit of the second liquid crystal unit 210 or by applying a voltage in every pattern unit. Accordingly, even when a general image is viewed, the image quality is not deteriorated due to the decrease of the pixels.

Including these concepts, the present invention is substantially implemented in the form of FIG. However, since the overall concept has been described in detail with reference to FIGS. 2 to 4, only the terms will be used in the following description.

In the present invention, the arrangement of each pixel is arranged in a line-to-line manner.

Since the description of the pixel has been described in detail with reference to FIGS. 2 to 4, the pixel described below should be understood as a pixel having such a structure.

In the line-to-line method, as shown in FIG. 5, the left eye image is transmitted over the entire pixel on one line and the right eye image is transmitted on the entire other pixel on the other line. Method.

For example, as shown in (a) of FIG. 5, if the viewer A and the viewer B are in a normal position with each other viewing the normal images, it is not a problem at all.

This is because, as described above, it is confirmed by the graph of FIG. 1 that the abnormal region occurring near the boundary of the multi-view, that is, the abnormal region is related to the distance between the viewer A and the viewer B, In this case, since the left eye image is displayed on the left eye and the right eye image is displayed on the right eye, good stereoscopic images can be viewed without any abnormal region.

However, as shown in FIG. 5B, an abnormal phenomenon such as a reverse phase occurs when the viewer B looks at the same point when viewing the panel with a distance corresponding to the abnormal region with respect to the viewer A.

Accordingly, in the present invention, in consideration of the size of the panel and the ideal region calculated by the distance between the viewers A and B, images are arranged separately in a mosaic manner, and mosaic The left eye image and the right eye image are reversed so that a reverse image is not generated so that both the viewers A and B can view each normal image even in the abnormal region.

In other words, as shown in FIG. 5A, when the viewers A and B are viewed in the normal region, there is no overlapping portion (the same view viewing portion), so that the mosaic portion M, Images that are blackened are arranged normally.

For example, a left-eye image is displayed on the left-eye image line and a right-eye image is displayed on the right-eye image line. Accordingly, the left eye image or the right eye image corresponding to the corresponding line image is output as it is to the mosaic section M.

5 (b), in the ideal region, the viewers A and B see the same image at the first and second intersections T1 and T2, for example, the first intersection T1, The right eye image is output, and when the viewer A sees the normal right eye image, the left eye of the viewer B at the ideal region (relating to the distance between the viewers) has the same first intersection T1 Since the right eye image is seen, not the left eye image at the moment of viewing, viewer B is confused because of image reversal, that is, reversed image.

This is also true at the second intersection T2.

At this time, the control unit (not shown) of the display device confirms the left eye of the viewer B through eye trekking, and changes the image of the mosaic unit M, which is the part where the abnormal area is implemented, through the image reversal device (not shown).

Then, the viewer A sees a normal right-eye image, and the original right-eye image is output in a line-to-line manner by reversing the image at the left and right at the first intersection T1, M), the viewer B sees the left eye image through the left eye, so that both of them can see a normal image.

Here, the image reversal device does not mean that the image reverses, but as described above, the left eye image and the right eye image are exchanged with each other. This is because the control unit controls the display order of the left eye image and the right eye image This is a matter that can be solved simply by controlling to change. Nevertheless, the concept itself has not been disclosed until now.

As described above, the present invention can effectively solve an anomalous phenomenon in which a reversed phase occurs by introducing a mosaic section M and an image reversal device in an ideal region.

M: Mosaic part T1: First intersection
T2: 2nd intersection

Claims (2)

A stereoscopic image display apparatus having a pixel array of a line-to-line system and being implemented in a multi-view form, the apparatus comprising:
Forming a mosaic portion capable of reversing the image of the left eye image and the right eye image in the upper, lower, left, and right pixels around the boundary of the multi-view which is an abnormal region in which a reversed phase occurs;
Wherein when the reversed phase is detected in the ideal region through eye trekking, the reversed phase inverting apparatus is driven to reverse the image output through the mosaic unit.
The method of claim 1,
Wherein the abnormal region exists at a predetermined distance ratio according to a size of the multi-view and a distance between the multi-viewers.

Images