KR20140136211A - Apparatus for displaying stereo-scopic images in glassless mode - Google Patents

Abstract

A glassless stereoscopic image display device is disclosed. The glassless stereoscopic image display device according to an embodiment of the present invention is mounted on the front side of an image panel. The image panel comprises a plurality of pixels which are arranged as a matrix shape and output an image. The pixels are formed of sub pixels of each color. The glassless stereoscopic image display device comprises a lens unit and an optical pattern unit. A convex lens is arranged every portions corresponding to the sub pixels in the lens unit. The width of the convex lens is less than or equal to 130% of the width of the sub pixel. The optical pattern unit is arranged between the lens unit and the image panel. An optical panel is formed in the optical pattern unit so that a left eye line or a right eye line which is faced to the sub pixel after passing the convex lens is passed or prevented selectively by parallax of both eyes. The optical pattern forms a light prevention unit for preventing each of the pattern units arranged as the matrix shape or a light transmission unit for passing each of the pattern units. Two or more pattern units are formed at every portions corresponding to the convex lens in the optical pattern unit. According to the present invention, a phase spreading phenomenon of a traditional lenticular method can be prevented. A glassless stereoscopic image can be formed without the degradation of resolution of points of view. Moreover, a crosstalk phenomenon can be prevented and the glassless stereoscopic image can be formed thinner than a traditional parallax barrier method.

Description

[0001] Apparatus for displaying stereoscopic images in a glassless mode [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an apparatus for displaying a stereoscopic image in a non-eyeglass system, and more particularly, to an apparatus for allowing a viewer to view a stereoscopic image in a non-eyeglass system.

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 .

SUMMARY OF THE INVENTION The present invention provides a non-eyeglass stereoscopic image display device capable of solving the above-described conventional problems, and more particularly, it is possible to solve the phase expansion phenomenon in the lenticular method, Eye stereoscopic image display device in which no phase deterioration is minimized even when a stereoscopic image is viewed.

In order to solve the above problems, a non-eyeglass stereoscopic image display device according to an embodiment of the present invention is mounted on a front surface of a video panel. The image panel includes a plurality of pixels arranged in a matrix form to output an image.

The image panel outputs the left eye image and the right eye image in a space division manner through the plurality of pixels. However, the image panel may output the left eye image and the right eye image in a time division manner through the plurality of pixels. The pixel consists of subpixels of each color.

The non-eyeglass stereoscopic image display apparatus includes a lens unit and an optical pattern unit.

And the lens unit is provided with a convex lens for each portion corresponding to the subpixel. The width of the convex lens is 130% or less of the width of the subpixel.

The optical pattern unit is disposed between the lens unit and the image panel. The optical pattern part is formed such that the left eye line or the right eye line passing through the convex lens and passing through the sub pixel is selectively passed or blocked due to binocular parallax.

The optical pattern is constituted by forming each of the pattern units arranged in a matrix form a light-transmitting portion for passage or a light-shielding portion for blocking. In the optical pattern unit, there are at least two pattern units for each portion corresponding to the convex lens.

According to the present invention, even though a convex lens having a short width of 130% or less of the width of the subpixel is used, the convex lens is organically combined with the optical pattern portion and interacts with each other, so that both the left eye image and the right eye image No visible phenomenon occurs. Since a convex lens having a short width is disposed for each portion corresponding to the subpixel, the color of all the subpixels can form an image on the lens portion even if a convex lens effect occurs. This can prevent the phase spreading phenomenon in the conventional lenticular method. Also, when viewing the stereoscopic image, the color of each of the R, G, and B subpixels is superimposed on the lens portion, so that the spreading phenomenon is prevented. Therefore, it is possible to view a clear stereoscopic image without deterioration in resolution.

In addition, when four or more pattern units are formed for each portion corresponding to the convex lens disposed for the subpixel, a multi-view point can be implemented. If a multi-view point is implemented in this manner, As shown in FIG. This makes it possible to realize a resolution-free image even at a time when the non-eyeglass stereoscopic image is displayed.

The line passing through the lens portion and reaching the optical pattern portion is not reached as it is, but reaches as a focal point. Thus, the so-called crosstalk phenomenon in which the right eye image is seen in the left eye or the left eye image is seen in the right eye can be prevented. Further, the distance and the angle at which stereoscopic images can be viewed can be formed over a wide range. In addition, even when the viewing distance is long like a TV, since the distance between the image panel and the barrier filter is not increased as in the conventional parallax barrier system, it can be realized to be thinner than the conventional parallax barrier system.

1 is a schematic cross-sectional view of a spectacle-free three-dimensional image display device according to an embodiment of the present invention.
2 is a partial perspective view of the lens portion of FIG.
Fig. 3 shows an overcoat layer added to Fig.
4 is a partial front view of an embodiment of an optical pattern formed in the optical pattern portion of Fig.
Figure 5 is a partial front view of another embodiment of Figure 4;
Figure 6 is a partial front view of another embodiment of Figure 4;
Figure 7 is a partial front view of another embodiment of Figure 4;

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The terms or words used herein should not be construed as limited to ordinary or dictionary terms and the inventor is of the opinion that the concept of a term can be properly defined to describe its invention in the best way possible And should be construed as meaning and concept consistent with the technical idea of the present invention.

1 is a schematic cross-sectional view of a spectacle-free three-dimensional image display device according to an embodiment of the present invention. Referring to FIG. 1, a non-eyeglass stereoscopic image display device 200 is mounted on a front surface of a video panel 100.

The image panel 100 includes a plurality of pixels arranged in a matrix form. The image panel 100 outputs a left-eye image and a right-eye image in a space division manner through a plurality of pixels. In the spatial division method, a part of pixels output a left eye image and the rest of pixels output a right eye image.

For example, pixels in an odd column in a matrix of pixels may output a left eye image, and pixels in an even column may output a right eye image at the same time. In another example, pixels in an odd row output a left eye image and pixels in an even row simultaneously output a right eye image. For another example, the pixels located in the odd columns of the odd rows and the pixels located in the even columns of the even rows may output the left eye image and the remaining pixels may output the right eye image.

Meanwhile, in the present embodiment, the non-eyeglass stereoscopic image display device 200 is mounted on the spatial image-based image panel 100, but the non-eyeglass stereoscopic image display device 200 may be mounted on the time- . 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 left eye image pixel 111 and a right eye image pixel 112. The left eye image pixel 111 is a pixel for outputting a left eye image L and the right eye image pixel 112 is a pixel for outputting a right eye image R.

In the video panel 100 of the present embodiment, a plurality of pixels arranged in a matrix form output a left-eye image and a right-eye image in a space division manner. However, in FIG. 1, one left- Only one right eye image pixel 112 adjacent thereto is shown.

Pixels 111 and 112 are composed of subpixels of each color. That is, the left eye image pixel 111 is composed of R sub pixels 111-1, G sub pixels 111-2, and B sub pixels 111-3 arranged side by side in the horizontal direction, and the right eye image pixels 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 130% or less of the width of the sub pixels 111-1 to 3, 112-1 to 3. That is, the width of the lens column 251 is less than or equal to 130% of the width of the sub-pixels 111-1 to 3 and 112-1 to 3, respectively.

Preferably, the width of the lens column 251 is 120% or less of the width of the sub pixels 111-1 to 3, 112-1 to 3. More preferably, the width of the lens column 251 is 110% or less of the width of the sub pixels 111-1 to 3 and 112-1 to 3. The width of the lens column 251 illustrated in Fig. 1 corresponds to 100% of the widths of the sub pixels 111-1 to 3 and 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.

When the width of the lens column 251 is 100% or less of the widths of the sub pixels 111-1 to 3 and 112-1 to 3, the lens column is provided with lens columns 251 . Thus, the convex lens is disposed in the lens portion for each portion corresponding to each of all the sub-pixels.

If the width of the lens column 251 exceeds 100% of the width of the sub-pixels 111-1 to 3, 112-1 to 3, it may happen that some sub-pixel columns do not have a corresponding lens column 251 have. 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.

The lens column 251 may be disposed diagonally with respect to the subpixels in order to minimize the Moire effect that may occur due to the arrangement of the lens column array 250 and the image panel 100 together. That is, the lens column 251 can be disposed at an angle with respect to the subpixels so as to form an angle between the longitudinal center axis of the lens column 251 and the longitudinal center axis of the subpixel so as to minimize the moire phenomenon. 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 exceeds 100% of the widths of the sub pixels 111-1 to 3 and 112-1 to 3, When the columns 251 were arranged diagonally, 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.

2 is a partial perspective view of the lens portion of FIG. Referring to FIG. 2, 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.

Fig. 3 shows an overcoat layer added to Fig. Referring to FIG. 3, an overcoat layer 260 may be added to the front surface of the lens column array 250. 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. 1, 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 larger than 1 / 2N (N is the number of viewpoints) of the width of the lens column 251 and equal to 1 / 2N or less.

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 columnar array 251 and toward 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.

The optical pattern is formed such that the left eye or the right eye passing through the lens column array 251 and directed to the sub pixels 111-1 to 3 and 112-1 to 3 is selectively passed or blocked due to binocular parallax.

More specifically, the optical pattern allows the left eye line to pass through and the right eye line to be blocked for each of the left eye image subpixels 111-1 to 3, The right eye line is passed and the left eye line is blocked.

For this selective blocking, the second liquid crystal unit 210 is provided with a light-transmitting portion in a portion where the left eye line of the binocular visual line toward each of the left eye image sub-pixels 111-1 to 3 is reached, and a light- Respectively. In the second liquid crystal unit 210, a light shielding portion is disposed in a portion of the binocular visual line toward each of the right eye image subpixels 112-1 to 112-3, and a light transmitting portion is disposed in a portion of the right eye visual line.

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 column array 251 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 pattern units adjacent to each other and forming the shielding portion in the other pattern unit do. 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.

For the binocular visual line directed to the left eye image subpixels 111-1 to 3 using the subpattern, the right eye eye line is blocked and the left eye eye line is passed and the binocular eye line toward the right eye image subpixels 112-1 to 3 It is possible to block the left eye line and pass the right eye line, and such selective blocking enables the viewer to view the stereoscopic image through the binocular disparity.

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 through 3 and 112-1 through 3 in the lens column array 251. [

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. The sub pattern may have a light shielding portion on the right side of the light transmission portion on the left side or a light transmission portion on the right side of the light shielding portion.

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. [ As a result, the right eye image R as well as the left eye image L can be seen in the left eye as well as the left eye image L as well as the right eye image R in the right eye.

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 in the non-eyeglass stereoscopic image display device 200, both the left eye image L and the right eye image R will be displayed in the left eye of the viewer and the left eye image L and the right eye image R are displayed on the right eye of the viewer, This will all be visible. Since the lens columnar array 250 does not include the left eye image L and the right eye image R since 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, Can not be separated.

However, the optical pattern formed on the optical pattern portion passes through the lens column array 251 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. 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 short width of 130% or less of 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. [

The second liquid crystal unit 210 functions as a Polymer Network Liquid Crystal (PNLC) type switchable display shutter. Thus, the optical pattern formed on the optical pattern portion is variable. If the pattern units to which the voltage is applied are changed in the second solution unit 210, the optical pattern formed on the optical pattern unit is also changed. 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, the left eye image (R) can be seen in the left eye and the left eye image (L) can be seen in the left eye at the position after the movement, but the left eye image (L) It is possible to adjust so that the right eye image R can be seen.

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.

4 is a partial front view of an embodiment of an optical pattern formed in the optical pattern portion of Fig. Referring to FIG. 4, the first optical pattern 210A has a matrix shape in which the light shielding portion 211 and the light projecting portion 212 are repeatedly arranged in rows and columns.

The size of each of the light shielding portion 211 and the light projecting portion 212 corresponds to the size of the pattern of the second liquid crystal unit 210. The unit height of the first optical pattern 210A corresponds to the height of the unit pixel.

The first optical pattern 210A may be applied to a case where pixels for outputting a left eye image and pixels for outputting a right eye image in a matrix of pixels are repeated in turn for each row. That is, the first optical pattern 210A may be applied to a case where a left-eye image and a right-eye image are output in a top and bottom form in a matrix of pixels.

Figure 5 is a partial front view of another embodiment of Figure 4; 5, in the second optical pattern 210B, the long-width transparent portions 213 and the two light-shielding portions 211 formed by continuously arranging the two transparent portions 212 in the transverse direction are arranged continuously in the horizontal direction Shielding portions 214 are formed.

Such a continuous arrangement may occur when the optical pattern corresponding to each of the convex lenses adjacent to each other is continuously arranged and the pattern unit located at the boundary is the same as the light-transmitting portion or the light-shielding portion.

The second optical pattern 210B has a matrix shape in which the light shielding portion 211 or the wide light shielding portion 214 and the light projecting portion 212 or the wide light projecting portion 213 are repeatedly arranged in rows and columns. The unit height of the second optical pattern 210B also corresponds to the height of the unit pixels.

The second optical pattern 210B may be applied when a left eye image and a right eye image are output in a checkerboard form in a matrix of pixels.

Figure 6 is a partial front view of another embodiment of Figure 4; 6, the third optical pattern 210C includes a light-shielding portion row 215 formed by continuously arranging a plurality of light-shielding portions in the longitudinal direction and a light-transmitting portion row 216 formed by continuously arranging a plurality of light- ).

The third optical pattern 210C has a shape in which the light-shielding portion row 215 and the light-transmitting portion row 216 are repeatedly arranged in the lateral direction in turn. The unit height of the third optical pattern 210C corresponds to the total height of the matrix of pixels, that is, the height of the image panel.

The third optical pattern 210C may be applied when the left eye image and the right eye image are output in a time-division manner in a matrix of pixels.

Figure 7 is a partial front view of another embodiment of Figure 4; 7, in the fourth optical pattern 210D, long-width light-shielding part rows 217 and two light-shielding part rows 217 formed by two light-transmitting part rows 216 arranged in a transverse direction are arranged in a horizontal direction There are long-width transparent portions 218 formed by being continuously arranged with a long width.

Such a continuous arrangement may occur when optical pattern corresponding to each of the lens columns adjacent to each other is consecutively arranged and the pattern unit rows positioned at the boundary are the same as the transparent portion or the light shield portion row.

The fourth optical pattern 210D is a form in which the light shielding part row 215 or the long narrow light shielding part row 217 and the light transmitting part row 216 or the long width light transmitting part row 217 are repeatedly arranged in the lateral direction in turn. The unit height of the fourth optical pattern 210D also corresponds to the total height of the matrix of pixels, that is, the height of the image panel.

The fourth optical pattern 210D can be applied to a case where odd-numbered columns of pixels in a matrix of pixels output a monocular image and pixels of even-numbered columns simultaneously output a tile image. In other words, the fourth optical pattern 210D can be applied to a case where a single-eye image and a tile image are outputted side by side in a matrix of pixels.

Meanwhile, the optical pattern unit may be implemented in a mode different from that of the present embodiment as long as it can generate a binocular parallax to a viewer through selective blocking using an optical pattern as in the present embodiment.

For example, the optical pattern portion may include a filter printed with a black ink on a transparent film, a film selectively etched with a polarizer, a 1/2 lambda pattern retarder film combined with a polarizer, a polarizer and a 1/4 lambda retarder film, A 4? Pattern retarder film, a liquid crystal display combined with a polarizing plate, or the like.

The present invention has been described with reference to the preferred embodiments. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. Therefore, the disclosed embodiments should be considered in an illustrative rather than a restrictive sense. The scope of the present invention is defined by the appended claims rather than by the foregoing description, and all differences within the scope of equivalents thereof should be construed as being included in the present invention.

100: video panel 110:
111: Left eye image pixel 111-1: R-sub pixel of the left eye image (L)
111-2: G subpixel 111-3 of the left eye image L: B subpixel of the left eye image L
112-1: R sub-pixel 112-2 of the right eye image (R): G sub-pixel of the right eye image (R)
112-3: B subpixel 120 of the right eye image (R): first transparent sheet layer
130: first polarizing plate
200: Non-eyeglass stereoscopic image display device
210: second liquid portion 210A: first optical pattern
210B: second optical pattern 210C: third optical pattern
210D: fourth optical pattern 211:
212: transparent portion 213: long-width transparent portion
214: long-width-light-shielding portion 215: light-shielding portion
216: transparent portion column 217: long width transparent portion column
218: long-width light-shielding portion column 219: pattern unit
220: second polarizer 230: second transparent sheet layer
240: base layer 250: lens columnar array
251: lens column 260: overcoat layer

Claims (8)

A non-eyeglass stereoscopic image display device mounted on a front surface of a video panel, the video panel including a plurality of pixels arranged in a matrix form to output an image, the pixels being composed of subpixels of respective colors, Is:
A lens portion having a convex lens having a width of 130% or less of a width of the subpixel for each portion corresponding to the subpixel; And
And an optical pattern portion disposed between the lens portion and the image panel and having an optical pattern formed through the lens column so that the left eye or the right eye directed toward the subpixel is selectively passed or blocked due to binocular parallax ,
Wherein each of the pattern units arranged in a matrix form is constituted by forming a transparent portion for passing through or a shielding portion for blocking the optical pattern, wherein the optical pattern portion includes at least two pattern units each corresponding to the lens column, Eye stereoscopic image display device.
The apparatus according to claim 1, wherein the pixels are arranged in the horizontal direction along the subpixels of the respective colors.
The optical element according to claim 1,
Eye image is outputted for a subpixel for outputting a left eye image and a right eye image is blocked for a subpixel for outputting a right eye image and a left eye line is blocked for a subpixel for outputting a right eye image, Device.
The optical element according to claim 1,
Wherein at least one sub-pattern formed adjacent to the light-shielding portion and the light-transmitting portion is included in each portion corresponding to the convex lens.
The optical system according to claim 1, wherein the optical pattern portion
A liquid crystal filled between the electrodes for applying a voltage to the pattern unit; And
And a polarizing plate disposed between the liquid crystal portion and the lens portion,
Wherein the light-shielding portion and the light-transmitting portion are different in a liquid crystal arrangement in the liquid crystal portion.
6. The zoom lens according to claim 5,
The distance between the portion of the binocular line passing through the convex lens toward the liquid crystal unit and the portion of the binocular visual line extending from the liquid crystal unit to the liquid crystal unit corresponds to the width of the pattern unit, Eye stereoscopic image display device.
7. The apparatus of claim 6, wherein the optical pattern portion
Further comprising a transparent sheet layer disposed between the lens portion and the liquid portion to secure a distance between the lens portion and the liquid portion.
The lens barrel according to claim 1,
Wherein the lens column has a width of less than or equal to 130% of the width of the sub-pixel and the cross-section of the lens column is a circular or elliptical shape, Display device.

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