KR20170050351A - Stereoscopic Image Display Device And Method For Driving the Same - Google Patents

Abstract

The present invention relates to a 2D/3D image display device, which allows slimness of a 3D image display device and is able to minimize reduction of brightness in a 2D driving mode while securing a predetermined optical watching distance or more with uniform brightness without 3D crosstalk, and a driving method thereof. In the 3D image display apparatus according to the present invention, sub-pixels positioned on a first horizontal line have a barrier with a light-shielding pattern including an opening for exposing a part of each sub-pixel, and sub-pixels positioned on a second horizontal line have no light-shielding pattern formed thereon. An image is displayed using all of the sub-pixels in a 2D driving mode, and a plurality of views are displayed using the sub-pixels positioned on the first horizontal line in a 3D driving mode. At this time, the sub-pixels positioned on the second horizontal line display a black or gray image.

Description

Technical Field [0001] The present invention relates to a stereoscopic image display device and a driving method thereof,

The present invention relates to a stereoscopic image display apparatus, and more particularly, to a stereoscopic image display apparatus capable of reducing a stereoscopic image display apparatus and achieving a 2D display, .

The stereoscopic image display apparatus can be divided into an eyeglass system and a non-eyeglass system depending on the presence or absence of glasses.

Among them, the non-eyeglass system implements a 3D image by installing an optical element in front of the display screen, which can cause a parallax between the left eye image and the right eye image. Examples of the optical element having such a function include a lenticular lens and a parallax barrier.

The parallax barrier includes vertical slits for transmitting or blocking light, and the left and right images are separated through the slits to realize a stereoscopic image. The lenticular lens has a bendable lenticular array type lens attached to the display panel The left and right images are separated by allowing the left and right eyes to see pixels different from each other, thereby realizing a stereoscopic image.

However, in the conventional stereoscopic image display apparatus, the optical viewing distance is generally determined by the pitch of the unit lens of the parallax portion or the unit slit of the specific period. However, Do.

Therefore, in order to increase the optical viewing distance, a separate gap glass is provided before or after the parallax portion. However, in this case, there is a problem that the thickness of the stereoscopic image display device is increased, .

Meanwhile, in the conventional stereoscopic image display apparatus, when dividing the screen into a plurality of views (hereinafter, referred to as 'views'), the view images are superimposed on each other to eliminate the luminance deviation. The stereoscopic image display device has a problem that the cross-talk phenomenon is increased by overlapping the view images.

SUMMARY OF THE INVENTION The present invention has been conceived to solve the above-mentioned problems, and it is an object of the present invention to provide a stereoscopic image display device which is slim, at the same time can secure an optical viewing distance over a certain level without a 3D crosstalk, Dimensional image display apparatus capable of minimizing a reduction in the number of pixels of a three-dimensional image.

According to an aspect of the present invention, there is provided a stereoscopic image display apparatus including a barrier provided with a light-shielding pattern including an opening for exposing a part of the subpixel in subpixels positioned on a first horizontal line, The shielding pattern is not formed in the subpixels located on the second horizontal line, the image is displayed using all of the subpixels while the 2D driving is performed, and the subpixels positioned on the first horizontal line are displayed So that the subpixels located on the second horizontal line then display a black or gray image.

On the other hand, the plurality of views can be sequentially displayed in the vertical direction by the subpixels positioned on the first horizontal line. At this time, subpixels located on the same horizontal line display the same view.

The period of the opening may be slightly larger or slightly smaller than the pitch of the sub-pixels.

The plurality of views may be alternately displayed on subpixels arranged in a first horizontal line located in another horizontal line group adjacent to the first horizontal line. At this time, the period of the opening is formed to be equal to the pitch of the sub-pixels.

On the other hand, the subpixels located on the second horizontal line can display a gray image having the same gray level as the lowest gray level among a plurality of views during 3D driving.

In the stereoscopic image display apparatus according to the present invention, the light shielding pattern is formed only on the sub-pixels located on some horizontal lines of the plurality of horizontal lines, and the other is formed as the aperture region, thereby greatly improving the brightness at the time of 2D construction.

Also, if the period of the opening is slightly larger or slightly smaller than the pitch of the subpixels, the black band phenomenon caused by the black matrix or the like between the subpixels can be reduced, and the subpixels of the same horizontal line display the same view The 3D crosstalk phenomenon is also reduced.

On the other hand, when a plurality of views are alternately displayed on the subpixels arranged on two adjacent horizontal lines, the black line phenomenon is reduced. Even if the width of the opening is formed as a half of the width of the subpixel, So that the brightness of the display device is increased.

1 is a schematic view showing a stereoscopic image display apparatus according to the present invention.
FIGS. 2 to 4 are diagrams for explaining various light shield patterns of a bottom barrier provided in the stereoscopic image display device according to the present invention.
5A and 5B show an example in which the period of the opening of the lower surface barrier is different from the pitch of the subpixel in order to reduce such a black band phenomenon.
FIGS. 6 and 7 are views for explaining a light blocking pattern of a bottom barrier and a display image of a sub-pixel included in the stereoscopic image display apparatus according to another embodiment of the present invention.

Prior to the present invention, a three-dimensional image display apparatus of a bottom barrier type in which a lower surface barrier is positioned on a lower surface of a display panel and a parallax is positioned on an upper surface of the display panel has been filed.

The stereoscopic image display device having such a new structure not only achieves slimming of the stereoscopic image display device but also has an advantage that the optical viewing distance over a certain level can be ensured with uniform luminance without 3D crosstalk.

The bottom barrier of the stereoscopic image display device may be formed by opening only a part of the subpixel of the display panel to reduce the optical pitch of the image panel in a predetermined view so that optical viewing is inversely proportional to the optical pitch It is possible to increase the optical viewing distance of the stereoscopic display panel by using the characteristics of the distance.

As a result, the stereoscopic image display device of the new structure has a problem that the light in a part of the subpixel of the display panel is cut off, and as a result, the luminance of the stereoscopic image display device is reduced.

Particularly, the stereoscopic image display device can be designed to be capable of both 2D / 3D driving. In this case, since the user is often driven in the 2D mode, there is a need to minimize the luminance reduction in the 2D mode of the stereoscopic image display device Was raised.

The present invention has been proposed in order to prevent the luminance of the stereoscopic image display device from being reduced, and in particular, has been proposed in order to greatly improve the luminance when the stereoscopic image display device is driven in 2D.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. Like reference numerals throughout the specification denote substantially identical components. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the following description, a detailed description of known technologies or configurations related to the present invention will be omitted when it is determined that the gist of the present invention may be unnecessarily obscured. The component names used in the following description are selected in consideration of easiness of specification, and may be different from the parts names of actual products.

1 is a schematic view showing a stereoscopic image display apparatus according to the present invention.

A stereoscopic image display apparatus according to the present invention includes a display panel 200 having a plurality of subpixels in a matrix form and displaying an image, a display panel 200 located on the display panel 200, And includes a parallax part 500 and a bottom barrier 300 which is located on the lower surface of the display panel 200 and has an opening 401 for opening only a part of the subpixel.

On the other hand, the light source unit 100 shown in the drawing transmits light upward from a light source arranged on a side or a lower side, and includes a light source and a plurality of optical sheets. The light source unit 100 may be omitted depending on the type of the display panel 200. For example, when the display panel 200 is a display panel using a self-luminous display device such as an organic light emitting display panel or an electrophoretic display panel, the light source unit 100 may be omitted, In the case of a light-receiving type device such as a display panel, a light source unit 100 is provided.

A light source used in the light source unit 100 may be a fluorescent lamp array, a light emitting diode (LED), a laser light source array, or the like. In order to induce surface emission from the lower side to the display panel 200, And may include a plurality of the same optical sheets.

The barrier 300 has regularly arranged openings 401. The openings 401 open only a part of the subpixels of the display panel 200 and allow the display panel 200 ), It is possible to increase the optical viewing distance of the stereoscopic image display device due to the characteristic of the optical viewing distance (OVD) that is inversely proportional to the optical pitch under the optically same gap condition. Here, the bottom barrier 300 allows the light corresponding to a part of the images of different views transmitted to the display panel 200 to be emitted to the parallax portion on the upper side of the display panel.

The stereoscopic image display apparatus according to the present invention differs from the stereoscopic image display apparatus according to the present invention in that a gap glass having a thickness of about 5 mm or more is included in a conventional three- So that the thickness of the patterned light-shielding pattern does not substantially affect the summed thickness of the display panel 200 and the parallax portion 500 at a level of 0.05 mu m to 0.3 mu m. Accordingly, a stereoscopic image display device having a parallax and bottom barrier on the top and bottom surfaces of the display panel, respectively, and maintaining a slimmed state, thereby increasing the optical viewing distance can be realized.

The parallax part 500 is, for example, a lenticular lens array, and regularly arranged lenses having a long and constant pitch P _L in the longitudinal direction. The lenticular lens array may be a lens having a constant curvature, or may be a switchable lens array in which a change in refractive index is controlled by on / off by a voltage. In the case of a switchable lens array, the stereoscopic image display apparatus can selectively display 3D / 2D by turning on / off the switchable lens array. In this case, the most basic form of the switchable lens array includes first and second substrates opposed to each other, a liquid crystal layer between the first and second substrates, a common electrode on the second substrate, And a plurality of first electrodes corresponding to a lens region corresponding to a pitch.

In the case of 3D display, the switchable lens array applies the highest voltage to the first electrode located at the center of the lens region and applies a gradually lowering voltage toward the center of the lens region, And is driven by applying the lowest voltage among the voltages applied to the electrodes. At this time, the refractive index becomes the smallest at the center of the lens region and the refractive index gradually increases as the distance from the center increases, so that the optical refractive index difference such as the lenticular lens is obtained, and the image from the display panel 200 is separated according to the viewpoint.

Also, in the case of a 2D display, the switchable lens array functions as a transparent film by eliminating the refractive index difference between the first electrodes and the common electrode, so that the image of the lower display panel is output as it is.

In the present invention, it is preferable that the parallax unit 500 is formed of the switchable lens array so as to be able to be driven in both 2D and 3D.

The display panel 200 may be classified into a transmissive type display panel and a light receiving type display panel. 1 shows a stereoscopic image display device provided with a light source unit 100. In this case, the stereoscopic image display device is assumed to be a light-receiving display panel. However, if the light source unit 100 is omitted, the stereoscopic image display apparatus can be implemented only in the order of the barrier 300, the display panel 200, and the parallax unit 500.

When the display panel 200 is a liquid crystal panel, the display panel 200 includes a lower plate 210 and an upper plate 220 opposed to each other, a liquid crystal layer filled therebetween, a thin film transistor array on the lower plate side, And a color filter array.

The liquid crystal cells are driven by an electric field between a pixel electrode to which a data voltage is supplied through a TFT and a common electrode to which a common voltage is supplied. The gate electrode of the TFT is connected to the gate line GL, the source electrode of the TFT is connected to the data line DL, and the drain electrode of the TFT is connected to the pixel electrode of the liquid crystal cell. The TFT is turned on according to the gate pulse supplied through the gate line GL to supply the data voltage from the data line DL to the pixel electrode of the liquid crystal cell.

When the display panel is an organic light emitting panel, the display panel 200 includes a driving transistor array (not shown) provided on the lower plate 210 and an organic light emitting diode array (not shown) (Not shown). Meanwhile, the upper plate 220 may not be provided at this time.

Each sub-pixel is provided with an organic light emitting element OLED composed of an organic light emitting layer between the anode and the cathode, and a pixel circuit independently driving the organic light emitting element OLED.

The pixel circuit includes at least one switching transistor TR1, TR3, at least one capacitor Cst, and a driving transistor TR2. The plurality of switching transistors TR1 and TR3 charge a data signal to a capacitor Cst in response to a scan signal generated in units of horizontal periods. The driving transistor TR2 supplies the constant voltage V _DD to the organic light emitting element in accordance with the data voltage charged in the capacitor Cst to drive the organic light emitting element OLED.

In order to drive the display panel 200, the three-dimensional image display apparatus according to the present invention may further include a gate driver for driving the gate line GL, a data driver for driving the data line DL, And a timing controller for generating gate and data control signals (GCS and DCS) to control the gate and the data driver.

The display panel 200 may further include a first polarizer 110 and a second polarizer 120 on the top and bottom of the display panel 200. The first and second polarizing plates 110 and 120 may be omitted from one side or both sides depending on the type of the display panel 200. [

On the other hand, the light shielding pattern of the bottom barrier 300 of the present invention is formed only on the lower surface of the subpixels located on the odd horizontal line, or only on the lower surface of the subpixels located on the even horizontal line . Accordingly, the entire area of the sub-pixels on the horizontal line where the light-shielding pattern is not formed is opened.

In the present invention, a horizontal line in which sub-pixels in which a light-shielding pattern is formed is defined as a first horizontal line, a sub-pixel in which no light-shielding pattern is formed is defined as a horizontal line, And the second horizontal line may be defined as one horizontal line group. The display panel 200 includes the plurality of horizontal line groups.

The subpixels located on the second horizontal line H2, which is opened as a whole, are used for 2D image display during 2D driving of the stereoscopic image display apparatus, and the subpixels display a black or gray image And is not used for 3D image display.

In the stereoscopic image display device according to the present invention having the bottom barrier 300 as described above, 50% of all the sub-pixels are not shielded by the light-shielding pattern in the 2D driving, resulting in a large increase in luminance during 2D driving.

In the stereoscopic image display apparatus according to the present invention, a plurality of views are not displayed in an overlapping manner, and only one view is displayed in each of the subpixels.

Hereinafter, an embodiment of the barrier 300 will be described in more detail with reference to the drawings.

FIGS. 2 to 4 are diagrams for explaining various light shield patterns 400 of the bottom barrier 300 provided in the stereoscopic image display apparatus according to the present invention. Here, the parallax part 500 is shown for explaining the pitch of the lens provided in the parallax part 500 and the period of the opening part 401. Here, the light shielding pattern 400 is formed on the lower surface of the sub pixel SP And FIGS. 2 to 4 show the surface to be displayed.

2 to 4, the light shielding pattern 400 is formed to expose a part of each subpixel SP only on the subpixel SP provided on the first horizontal line H1.

The entire area of the subpixels SP provided on the second horizontal line H2 on which the shading pattern 400 is not formed is opened.

Here, the period of the opening 401 refers to a horizontal gap between a time point of one opening 401 and a time point of the next opening 401 with respect to a subpixel of a horizontal line.

The width of the opening 401 is formed to correspond to the size of the period of the opening 401 divided by the number of views.

The opening provided in the pixel corresponding to the first horizontal line H1 corresponds to the first horizontal line H1 belonging to the other horizontal line group located at the upper portion in the vertical direction in the first horizontal line H1 The width of the opening is smaller than that of the opening.

Meanwhile, the opening may be formed in a parallelogram shape that is inclined in one direction. When the openings are formed in a parallelogram shape, each subpixel is more advantageous in separating and displaying only one view, thereby greatly reducing the luminance deviation phenomenon and the crosstalk phenomenon.

However, when the openings are formed in a parallelogram shape as described above, there is a high possibility that an error in the process occurs. In this case, the degree of shift between the opening and the opening arranged on the other first horizontal line H1 located at the upper portion in the vertical direction may be different, and in this case, a luminance deviation may occur. In order to prevent the luminance deviation due to the difference in the process, it is preferable that the tilted angle of the lens of the parallax part 500 is slightly different from the tilted angle of the parallelogram opening.

In other words, the lens of the parallax part 500 has a semi-cylindrical shape in which the bottom surface of the parallelogram having lateral sides equal to the opening width multiplied by the number of views to be displayed covers the opening 401, The tilted angle of the lens having the cylindrical shape is formed to be slightly larger or slightly smaller than the inclined angle of the openings 401 of the parallelogram shape.

On the other hand, the pitch of the sub-pixels SP may be equal to or slightly smaller than the period of the opening 401. [ The pitch of the sub-pixels SP and the period of the opening 401 will be described later.

2 illustrates a case of displaying a 2-view image. In this case, the width of the opening 401 is about 1/2 of the period of the opening 401, about 1/2 of the pitch of the subpixels, or more It is slightly larger or slightly smaller.

3 illustrates the case of displaying a 3-view image. In this case, the width of the opening 401 is about 1/3 of the period of the opening 401, about 1/3 of the pitch of the subpixel, or more It is slightly larger or slightly smaller.

4 illustrates a case of displaying a 4-view image, the width of the opening 401 corresponds to about 1/4 of the pitch of the subpixel, or slightly larger or slightly smaller than the pitch of the subpixel.

On the other hand, the pitch of each lens provided in the parallax part 500 is formed to be the same as the period of the opening part 400.

Accordingly, an opening 401 corresponding to a subpixel displaying an m-th view (m is a natural number equal to or smaller than k) among k views (k is a natural number of 2 or more) corresponds to a lens provided in the parallax portion 500 k, which is formed by dividing the light-shielding film.

For example, referring to FIG. 2 showing two view images, an opening corresponding to a subpixel displaying one view image is located in the first region of the bisecting region of the lens, The opening corresponding to the pixel is located in the second area.

3, in which the view image is displayed, the opening for displaying one view image is located in the first area of the area divided into three lenses, and the openings for displaying the two view and three view images are located in the second and third areas Located. Likewise, referring to FIG. 4, even when a 4-view image is displayed, the opening for displaying the respective view images is located in an area where the lens is divided into four equal parts.

In FIGS. 2 to 4, one view to four view images are sequentially positioned in k divided areas of the lens, but the 1 view to 4 view images are sequentially positioned in k divided areas of the lens You do not have to. For example, in the case of displaying 2 view images, the positions of 1 view and 2 view may be changed. In case of FIG. 3 showing 3 view images, 2-1-3, 1-3-2, or 2-3-1 view And similarly, four view images may be arranged regardless of the order of the views.

The stereoscopic image display apparatus according to the present invention displays an image using only the subpixels on the first horizontal line on which the shading pattern 400 is formed during the 3D driving. At this time, the sub-pixels on the second horizontal line H2 on which the light-shielding pattern 400 is not formed display a black or gray image.

In addition, the same view is displayed for the subpixels on the same horizontal line, and the subpixels on the first horizontal line H1 of the other horizontal line group G in which the vertical shielding pattern 400 is formed are different The view is rendered.

For example, in FIG. 2 illustrating a display panel displaying two views, one view image is represented in subpixels corresponding to the first aperture 1, and subpixels corresponding to the second aperture 2 2 view image is displayed, and a black or gray image is displayed on the subpixels B in which the light shielding pattern 400 is not formed. At this time, if the subpixels in which the light-shielding pattern 400 is not formed display a gray image having a predetermined gray level, the brightness of the 3D driving is compensated for as compared with the case of displaying a black image.

For this purpose, it is preferable that the grayscale of the gray image be the same grayscale as that of the image having the lowest grayscale among images displaying a plurality of views of the display panel. For example, in a 3D display device that displays 4 views, if one view image is 100 gradations, 2 view images are 80 gradations, 3 view images are 60 gradations, and 4 view images are 90 gradations, the gray level of the gray image is 60 Gray level.

When the subpixels B on which the light-shielding pattern 400 is not formed display a gray image, there is a possibility that lifting of the entire display image occurs in some cases. Accordingly, when the subpixels B in which the light-shielding pattern 400 is not formed display a gray image, an optimizing unit (not shown) for optimizing the grayscale of each view is provided, and the grayscale of each view is optimized The lifting phenomenon can be solved through the process.

The optimizing unit is provided in a timing controller (not shown) that controls timing of display of the display panel 200, and can optimize the gradation of each view by correcting image data input from the outside.

As shown in Figs. 3 to 4, similarly in the display panel 200 displaying 3 views and 4 views, 1 to 4 view images are displayed in the first to fourth openings 1, 2, 3 and 4 And the black or gray image is displayed on the sub-pixels B in which the light-shielding pattern 400 is not formed.

In this case, each of the views can be represented by giving image information to each sub-pixel of the display panel 200.

As shown in FIGS. 2 to 4, the period of the opening 401 of the bottom barrier 300 may be the same as the sub-pixels of the display panel 200. For example, in the case of the first opening 1 repeated in the subpixel of the first horizontal line H1 in Fig. 4, the first opening 1 corresponds to the same position of the left boundary of each subpixel, The distance from the start point of the first opening 1 to the start point of the next first opening 1 corresponds to the period. Here, in the vertical column direction, the first through fourth openings 1, 2, 3, and 4 have different positions because, when different images are supplied to different views, So that only a part of light is emitted to the parallax part 500 by spatially separating the light. As described above, the barrier 300 has the effect of reducing the optical pitch of the image panel, such as the gap glass, and the optical viewing distance can be increased in proportion to the reduced optical pitch.

Meanwhile, in the stereoscopic image display device as described above, the boundary portions of the subpixels SP include a gate line and a data line intersecting with each other, and a black matrix having a margin larger than the width of the gate line and the data line, Layer (not shown).

However, the first opening 1 and the fourth opening 4 always correspond to the same portion in the subpixel. As shown in the figure, the overlapping area with the black matrix layer corresponds to the edge of the subpixel, The two openings (2) and the third openings (3) do not overlap with the black matrix layer. For the same horizontal line, the horizontal lines with the first opening and the horizontal lines with the fourth opening are substantially obscured by the black matrix layer and the second, The horizontal lines having the third openings mostly open the subpixel region, resulting in a light amount difference between the regions. Particularly, this is observed as a black band phenomenon in which an area having a large area overlapping with the black matrix layer on the display is black, and the viewer may directly perceive such a black band phenomenon, which may be a factor for hindering the sight.

5A and 5B show an example in which the pitch of the subpixel SP is different from the period of the opening 401 of the bottom barrier 300 in order to reduce such a black band phenomenon.

 5A shows the period of the opening of the bottom barrier 300 smaller than the subpixel pitch, and FIG. 3B shows the period of the opening larger than the pitch of the subpixel.

In this way, the openings 401 can correspond to different positions with respect to the subpixels of the same horizontal line. Thus, if the same view is displayed on subpixels of the same horizontal line, the same view can be displayed at different positions of the subpixels of the same horizontal line, and the overlapping of the opening corresponding to the same view and the black matrix layer of the subpixel It is possible to avoid the deviation to a specific part and to have an average value. Therefore, it is possible to prevent the luminance deviation from occurring in the same view.

That is, in the stereoscopic image display apparatus in which the opening 401 pattern of the lower surface barrier 300 has the structure shown in FIG. 5A or 5B, the overlapping relationship of the black matrix layer and the opening is averaged with respect to the subpixels of each horizontal line Luminance unevenness appearing between horizontal lines of different views can be prevented.

Even if the openings of the same horizontal line are overlapped with different subpixels with respect to the subpixels to which the same view is supplied, the same view is displayed in the openings, so that the 3D crosstalk phenomenon can be prevented .

Meanwhile, the stereoscopic image display apparatus according to the present invention displays an image using all the subpixels provided in the display panel at the time of 2D driving.

If the stereoscopic image display apparatus according to the present invention displays two view images during 3D driving as shown in FIG. 2, the subpixel region shielded by the shielding pattern 400 corresponds to about 25% of all subpixel regions, Since the light blocking pattern 400 is not formed in half of the subpixels, the aperture area of the entire subpixels of the stereoscopic image display apparatus of FIG. 2 is about 75%. That is, the stereoscopic image display apparatus according to the present invention, which displays two view images compared to a general 2D display apparatus, achieves brightness of about 75% in 2D driving.

3, when the three-dimensional image display apparatus according to the present invention displays three view images during 3D driving, the aperture region of the entire sub-pixels of the stereoscopic display apparatus according to FIG. 3 corresponds to about 66.7% As shown in FIG. 4, when the stereoscopic image display device displays a 4-view image in 3D driving, approximately 62.5% corresponds to an aperture region of all the sub-pixels, thereby achieving the same luminance efficiency as a conventional 2D display device.

On the other hand, the three-dimensional image display device having a plurality of view images in the 3D driving mode in which all the pixels are provided with the light shielding pattern 400 is 50% in 2D view, 33.3% in 3D view, 4 The view will have a luminance efficiency of 25%.

As described above, the stereoscopic image display apparatus according to the present invention has a brightness enhancement effect in the 2D driving by forming the light shielding pattern 400 only on the subpixels located on some horizontal lines of the plurality of horizontal lines, and setting the rest as an opening region.

In this way, only the sub-pixels located on the first horizontal line H1 are formed with the light-shielding pattern 400 and the sub-pixels located on the first horizontal line H1 are sub- Pixels are not used for 3D display, and a stereoscopic image display device in which an image of the same view is displayed on the same horizontal line may have a problem that the black line becomes wider as the number of views to be displayed increases.

For example, as shown in FIG. 2, a three-dimensional image display device for displaying two views is displayed by crossing with only one view and two view images in the vertical direction, so that one view and two view images are displayed at a period of four pixels in the vertical direction. When the stereoscopic image display apparatus displays only two views, the period in which the image is displayed in the vertical direction is short, and thus the black line phenomenon is not a serious problem.

However, as shown in FIG. 3, a three-dimensional image display device displaying three views displays an image of the same view at six pixel intervals in the vertical direction, and a three-dimensional image display device displaying four views as shown in FIG. The image of the same view is displayed, so that the black line phenomenon gradually becomes strong, thereby causing the resolution to decrease and reaching a level at which the viewer can recognize the black line.

The stereoscopic image display apparatus according to another embodiment of the present invention described below is designed to solve the above problems, and will be described in detail with reference to the drawings.

FIGS. 6 and 7 are views for explaining a light blocking pattern of a bottom barrier and a display image of a sub-pixel included in the stereoscopic image display apparatus according to another embodiment of the present invention. Here, the parallax part 500 is shown for explaining the pitch of the lens provided in the parallax part 500 and the period of the opening part 401. Here, the light shielding pattern 400 is formed on the lower surface of the sub pixel SP And FIGS. 6 and 7 show the surface to be displayed.

6 to 7 are formed to expose a part of each subpixel SP only in the subpixel SP provided on the first horizontal line H1 as in the previous embodiment.

The entire area of the subpixels SP provided on the second horizontal line H2 on which the shading pattern 400 is not formed is opened.

In this embodiment, the pitch of the surplus pixels SP is the same as the period of the opening portion 401. Here, the period of the opening 401 refers to a horizontal gap between a time point of one opening 401 and a time point of the next opening 401 with respect to a subpixel of a horizontal line, as in the previous embodiment.

On the other hand, the width of the opening 401 is formed to be half the pitch of the subpixel SP.

In the present embodiment, the plurality of views are divided into a subpixel SP located on one first horizontal line on which the light-shielding pattern 400 is formed and another horizontal line group on which the light-shielding pattern 400 closest thereto is formed Are alternately displayed on the sub-pixels (SP) on the first horizontal line positioned.

That is, the plurality of views are divided into sub-pixels positioned on the first horizontal line H1 of one horizontal line group and sub-pixels positioned on the first horizontal line H1 of another horizontal line group adjacent to the horizontal line group Pixels are alternately displayed.

For example, in the case of the three-view image display device shown in FIG. 6, the first sub-pixel SP disposed on the first horizontal line H1 of the first horizontal line group G1 is provided with 1 A view is displayed and two views are displayed in the first subpixel SP disposed on the first horizontal line H1 of the second horizontal line group G2, Three views are displayed on the second subpixel SP disposed on one horizontal line H1 and the second subpixel SP2 arranged on the first horizontal line H1 of the second horizontal line group G2 SP) displays one view. As described above, the sub-pixels SP (t1, t2, t3, t4, t5, t5, t5, t5, t5, t5) ) Arrangement is repeated.

On the other hand, in the case of the three-view image display apparatus shown in FIG. 7, one view is displayed on the first subpixel SP disposed on the first horizontal line H1 of the first horizontal line group G1 Two views are displayed on the first subpixel SP disposed on the first horizontal line H1 of the second horizontal line group G2 and the second horizontal line group G2 is displayed on the second horizontal line group G2. Three views are displayed on the second subpixel SP arranged on the first horizontal line H1 and the second subpixel SP arranged on the first horizontal line H1 of the second horizontal line group G2 4 The view is displayed. As described above, the sub-pixels SP (t1, t2, t3, t4, t5, t5, t5, t5, t5, t5) ) Arrangement is repeated.

As described above, the plurality of views in the present embodiment are alternately displayed on the subpixels located on the two adjacent first horizontal lines H1.

Also in this embodiment, the plurality of views are sequentially displayed alternately to the subpixels positioned on the two horizontal lines, but the views may not be sequentially displayed alternately. For example, the view may alternate between subpixels located on the first horizontal line of the first horizontal line group G1 and subpixels located on the first horizontal line of the second horizontal line group G2, -1 view, or in the order of 2 view-3 view-1 view, or 2 view-4 view-1 view-3 view.

In this embodiment, the pitch of the lens provided in the parallax part 500 corresponds to the width of the opening multiplied by the view to be displayed. On the other hand, since the width of the opening 401 corresponds to 1/2 of the pitch of the subpixels SP, the pitch of the lenses provided in the parallax portions 500 of the three- ), And the pitch of the lens provided in the parallax portion 500 of the stereoscopic image display device for displaying four views is about twice the pitch of the sub-pixels SP.

As described above, according to the present embodiment, since the period of the opening 401 and the pitch of the subpixel SP are the same, even if images of different views are displayed on the same horizontal line, the crosstalk phenomenon hardly occurs.

Also, according to the present embodiment, the period of displaying the image of the same view in the vertical direction is greatly reduced as compared with the previous embodiment.

For example, as shown in FIGS. 6 and 7, the three-dimensional image display apparatus according to the present exemplary embodiment displays three views in 3D driving, The image of the same view is displayed at a period of 4 pixels in the vertical direction even if more views are displayed.

Therefore, in the stereoscopic image display apparatus according to the present embodiment, the black band phenomenon is significantly reduced in 3D driving as compared with the previous embodiment.

In addition, according to this embodiment, since the width of the opening corresponds to one-half of the sub-pixel, even if the stereoscopic image display device displays many views during 3D driving, Efficiency can be obtained, and therefore, the brightness at the time of 2D driving is greatly improved.

The foregoing description is merely illustrative of the present invention, and various modifications may be made by those skilled in the art without departing from the spirit of the present invention. Accordingly, the embodiments disclosed in the specification of the present invention are not intended to limit the present invention. The scope of the present invention should be construed according to the following claims, and all the techniques within the scope of equivalents should be construed as being included in the scope of the present invention.

100: light source unit 110: first polarizer plate
120: second polarizing plate 200: display panel
210: lower plate 220: upper plate
300: lower barrier 400: shielding pattern
401: opening part 500: parallax part
1-4: view H1: first horizontal line
H2: second horizontal line G1-G4: horizontal line group
SP: sub-pixel

Claims (16)

A display panel including a plurality of horizontal line groups each including a first horizontal line and a second horizontal line each having a plurality of subpixels,
Wherein the display panel includes openings that are located on a bottom surface of the display panel and open only a part of each subpixel positioned in the first horizontal line so as to have a constant period, When you include a pattern barrier,
And a parallax portion having a lens region located on the upper side of the display panel and having a lens pitch corresponding to a value obtained by multiplying the number of views displayed by the display panel by the width of the opening portion. The method according to claim 1,
Wherein the period of the opening of the barrier is equal to the pitch of each of the subpixels. The method according to claim 1,
Wherein the period of the opening of the barrier is larger than the pitch of each of the subpixels. The method according to claim 1,
Wherein the period of the barrier openings is smaller than the pitch of each of the sub pixels. The method according to claim 1,
Wherein each of the subpixels located on the second horizontal line displays a black or gray image during 3D driving and all subpixels display an image during 2D driving. The method according to claim 1,
Wherein the opening provided in the pixel corresponding to the first horizontal line includes:
Wherein the width of the opening is shifted by a width of the opening arranged in pixels corresponding to a first horizontal line belonging to another horizontal line group located at an upper portion in a vertical direction in the first horizontal line. The method according to claim 6,
The subpixels positioned on the first horizontal lines of the display panel in 3D driving,
A 2D / 3D image display apparatus which displays a plurality of views different in the vertical direction and displays the same view for each horizontal line. 3. The method of claim 2,
The openings provided in the pixels corresponding to the first horizontal line of the barrier may include,
Pixels are shifted by the width of the openings relative to the openings arranged in the subpixels corresponding to the first horizontal line belonging to the other horizontal line group located at the upper portion in the vertical direction in the first horizontal line,
In the 3D driving, k views (k is a natural number of 2 or more) are alternately displayed on the first horizontal line belonging to the other horizontal line group and the subpixels provided on the first horizontal line,
The opening portion exposing the subpixels representing the m-th view (m is a natural number equal to or less than k) is a 2D / 3D image positioned so as to correspond to any one of the regions formed by k- Display device. 9. The method according to any one of claims 6 to 8,
The opening is in the form of a parallelepiped which is inclined in one direction,
The lens of the parallax part has a semi-circular column shape having a parallelogram shape having a lateral length corresponding to a subpixel displaying the k view, and the parallelogram section is provided so as to cover the openings positioned in the vertical direction,
Wherein the tilted angle of the parallelogram section is different from the tilted angle of the opening section. 6. The method of claim 5,
Wherein the grayscale of the gray image is equal to the smallest grayscale value among the views displayed by the display panel when each subpixel positioned on the second horizontal line displays a gray image during 3D driving. 11. The method of claim 10,
Further comprising an optimizer for optimizing a gray level value of a plurality of view images to be displayed by the display panel when the gray level of the gray image is displayed. And a display panel including a plurality of horizontal line groups each including a first horizontal line and a second horizontal line each having a plurality of subpixels and each of the subpixels arranged in the first horizontal line, In a 2D / 3D image display apparatus having a barrier that opens only a part thereof,
The subpixels provided on the first horizontal line and the subpixels provided on the second horizontal line display a plurality of views,
A method of driving a 2D / 3D display device in which all subpixels display an image at the time of 2D driving. 13. The method of claim 12,
Wherein the subpixels included in the first horizontal line display a plurality of different views in a vertical direction and display the same view in a horizontal direction. 13. The method of claim 12,
In a 3D driving, a 2D / 3D image display device for displaying k views (k is a natural number of 2 or more) in a first horizontal line belonging to the other horizontal line group and in a subpixel included in the first horizontal line Driving method. 13. The method of claim 12,
When the subpixels provided on the second horizontal line display a gray image,
Wherein the grayscale of the gray image is the same as the grayscale of the lowest grayscale image among the views to be displayed. 16. The method of claim 15,
And optimizing grayscale of the plurality of view images when the gray image is displayed.

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