KR20170054691A - Stereoscopic Image Display Device And Method For Driving the Same - Google Patents
Stereoscopic Image Display Device And Method For Driving the Same Download PDFInfo
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- KR20170054691A KR20170054691A KR1020150157150A KR20150157150A KR20170054691A KR 20170054691 A KR20170054691 A KR 20170054691A KR 1020150157150 A KR1020150157150 A KR 1020150157150A KR 20150157150 A KR20150157150 A KR 20150157150A KR 20170054691 A KR20170054691 A KR 20170054691A
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- opening
- driving
- image display
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- Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
Abstract
A stereoscopic image display apparatus capable of minimizing the luminance reduction in the case of driving in 2D while achieving slimness of the stereoscopic image display apparatus and simultaneously ensuring a uniform viewing distance of the stereoscopic image without a 3D crosstalk, The three-dimensional image display apparatus according to the present invention is characterized in that the sub pixels located on the first horizontal line are provided with a barrier provided with a light shielding pattern including an opening for exposing a part of the sub pixels, The light blocking pattern is not formed in the subpixels located on the line, the image is displayed using all of the subpixels during the 2D driving, and the subpixels positioned on the first horizontal line are used during the 3D driving The subpixels located on the second horizontal line then represent a plurality of views to display a black or gray image Wherein the plurality of views are alternately displayed in subpixels corresponding to the openings arranged in the first horizontal line and in the openings arranged in the first horizontal line in another adjacent horizontal line group, At this time, when the period of the opening and the pitch of the subpixels are different, and thus the aperture is located between two subpixels, one of the two subpixels displays a black or gray image.
Description
The present invention relates to a stereoscopic image display device, which aims at slimming a stereoscopic image display device, enhancing a luminance during 2D driving while securing an optical viewing distance of a certain level or more, and preventing a black band phenomenon and a crosstalk phenomenon To a stereoscopic image display device capable of 2D display and a driving method thereof.
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.
Meanwhile, in the stereoscopic image display apparatus of the present invention, the period of the opening portion and the pitch of the subpixels are different, and accordingly, one subpixel is opened through two openings. At this time, the subpixels opened through the two subpixels display a black or gray image.
The plurality of views are alternately displayed on the subpixels corresponding to the openings arranged in the first horizontal line located in another horizontal line group adjacent to the subpixels corresponding to the openings located in the first horizontal line.
The stereoscopic image display apparatus according to the present invention not only achieves slimming of the stereoscopic image display apparatus but also has an advantage that it can ensure a uniform viewing angle with a certain degree of optical viewing distance or more without a 3D crosstalk.
Further, in the stereoscopic image display device according to the present invention, about 50% of all the subpixels are not shielded by the light-shielding pattern in the 2D driving, so that the brightness at the time of 2D driving greatly increases.
Since the three-dimensional image display device according to the present invention displays different views in the horizontal direction, it is possible to prevent a black line phenomenon that may occur when the same view is displayed in the horizontal direction. At this time, The black band phenomenon can be prevented. At the same time, in the stereoscopic image display apparatus according to the present invention, when one opening is correspondingly positioned in two adjacent subpixels, one of the two subpixels displays a black or gray image, thereby preventing 3D crosstalk.
1 is a schematic view showing a stereoscopic image display apparatus according to the present invention.
FIGS. 2 to 3 are diagrams for illustrating shielding patterns of a bottom barrier provided in the stereoscopic image display apparatus according to the present invention.
4 is an exemplary view for explaining the shape of a lens provided in the parallax portion.
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.
In addition, the stereoscopic image display device of the new structure displays images of the same view in the horizontal direction and images of different views in the vertical direction. As a result, as the number of display views of the image increases, And the present invention has the object of solving the black line phenomenon as described above.
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
On the other hand, the
A light source used in the
The
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
In addition, the
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
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
The
When the
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, the source electrode of the TFT is connected to the data line, 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 to supply the data voltage from the data line to the pixel electrode of the liquid crystal cell.
When the display panel is an organic light emitting panel, the
Each sub-pixel is provided with an organic light emitting element composed of an organic light emitting layer between the anode and the cathode, and a pixel circuit for independently driving the organic light emitting element.
The pixel circuit includes at least one switching transistor, at least one capacitor, and a driving transistor. The plurality of switching transistors charges a data signal in a capacitor in response to a scan signal generated every horizontal period. The driving transistor supplies a constant voltage to the organic light emitting element in accordance with the data voltage charged in the capacitor to drive the organic light emitting element.
In order to drive the
The
On the other hand, the light shielding pattern of the
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
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
In the stereoscopic image display apparatus according to the present invention, a plurality of views are not superimposed and displayed, and only one view is displayed in each subpixel.
Hereinafter, an embodiment of the
FIGS. 2 and 3 are diagrams for explaining the
2 to 3, the
The entire area of the subpixels SP provided on the second horizontal line H2 on which the
Here, the period of the
The width of the
For example, FIG. 2 shows a 3-view image, the width of the
The opening provided in the pixel corresponding to the first horizontal line H1 may include a pixel corresponding to the first horizontal line H1 belonging to another horizontal line group located at an upper position in the vertical direction in the first horizontal line H1 As compared to the openings arranged in the openings.
On the other hand, when the pitch of the subpixels SP is formed to be equal to the period of the
2 and 3 show an embodiment in which the period of the
The lens of the
At this time, an
4, the lens of the
In this case, as described above, the opening provided in the pixel corresponding to the first horizontal line H1 of the opening corresponds to the first horizontal line H1 belonging to the other horizontal line group located vertically above the first horizontal line H1 Is formed to be shifted by the width of the opening portion as compared with the opening portion arranged in the pixel corresponding to the horizontal line H1. Therefore, the lens is also preferably formed to be inclined.
Referring to FIGS. 2 and 3, the plurality of views are alternately arranged on the first horizontal line H1 of the first horizontal line group G1 and the first horizontal line H2 of the second horizontal line group G2. .
For example, in the case of the three-view image display apparatus shown in FIG. 2, the sub-pixels corresponding to the first opening disposed on the first horizontal line H1 of the first horizontal line group G1 SP), two views are displayed in a subpixel SP corresponding to the first opening arranged on the first horizontal line H1 of the second horizontal line group G2, Three views are displayed in the subpixels SP corresponding to the second opening arranged on the first horizontal line H1 of the horizontal line group G1 and the three views are displayed on the first horizontal line H1 of the second horizontal line group G2, And one view is displayed in the subpixel SP corresponding to the second opening portion disposed on the first pixel H1. Thus, from the first horizontal line group G1 to the subpixels corresponding to the last opening disposed on the first horizontal line H1 of the second horizontal line group G2, The arrangement of the subpixels SP is repeated.
On the other hand, in the case of the three-view image display apparatus shown in FIG. 3, the sub-pixels SP corresponding to the first opening disposed on the first horizontal line H1 of the first horizontal line group G1 Two views are displayed in a subpixel SP corresponding to the first opening disposed on the first horizontal line H1 of the second horizontal line group G2, The three views are displayed in the subpixels SP corresponding to the second opening disposed on the first horizontal line H1 of the first horizontal line G1 and the first horizontal line H1 of the second horizontal line group G2, Four views are displayed in the subpixel SP corresponding to the second opening portion disposed on the subpixel SP. Thus, the display of the above-described view is repeated until reaching the last openings arranged on the first horizontal line H1 of the first horizontal line group G1 and the second horizontal line group G2. do.
In FIGS. 2 and 3, the plurality of views are sequentially displayed alternately in the subpixels corresponding to the openings positioned on the two horizontal lines, but the views may not be sequentially displayed alternately. For example, the view corresponds to the subpixel corresponding to the opening located in the first horizontal line of the first horizontal line group G1 and the opening located in the first horizontal line of the second horizontal
In the present invention, since the pitch of the sub-pixel SP is different from the period of the
In this case, since images displaying different views are superimposed and displayed through one opening, a horizontal crosstalk phenomenon may occur.
In the present invention, in order to prevent the crosstalk phenomenon as described above, when one subpixel SP is formed to be opened through the two
2 and 3 are diagrams for explaining a three-view image and a four-view image when the period of the
2 to 3, in the stereoscopic image display apparatus of the present invention, the subpixel SP is periodically opened through two
Accordingly, only one sub-pixel SP displays the view image in one
At this time, the aperture width of the
In addition, the stereoscopic image display device according to the present invention can prevent a black line phenomenon that may occur when displaying the same view in the horizontal direction. The reason for this is as follows.
As described above, in the stereoscopic image display apparatus according to the present invention, the sub pixels located in the second horizontal line H2 in the 3D driving mode display a black or gray image. Accordingly, if the same view is displayed in the horizontal direction, the period in which the same view is displayed in the vertical direction is 6 pixels for 3 view images and 8 pixels for 4 view images. Accordingly, in the case of displaying the same view in the horizontal direction as described above, black line phenomenon occurs strongly, resulting in a problem that the resolution is reduced and the viewer can recognize the black line.
On the other hand, as shown in FIG. 2 and FIG. 3, the three-dimensional image display apparatus according to the present invention is configured such that when three views are displayed in 3D driving or when four views are displayed, And even if a larger number of views are displayed, an image of the same view is displayed at a period of four pixels in the vertical direction.
Therefore, the stereoscopic image display apparatus according to the present invention greatly reduces the black line phenomenon in 3D driving as compared with the stereoscopic image display apparatus which displays the same view in the horizontal direction.
Further, according to the present embodiment, the width of the
In other words, when displaying the same view in the horizontal direction, the width of the
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:
200: display panel 210: first substrate
220: second substrate 300: lower barrier
400: Shading pattern 401:
500: Parallaxfish
Claims (7)
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 period of the opening of the barrier is different from the pitch of each subpixel,
In the 3D driving, when the subpixels are opened through two adjacent openings, the subpixels opened through the two openings and the subpixels located in the region where the lightpath pattern is not formed display a black or gray image / RTI >
And an opening provided in a pixel corresponding to one of the plurality of horizontal lines,
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.
In the 3D driving, 2D / 3D (k is a natural number) in which k views (k is a natural number of 2 or more) are alternately displayed on the subpixels corresponding to the openings located in the two first horizontal lines, Video display device.
The pitch of the lens provided in the lens region corresponds to the width of the opening multiplied by k,
The opening for exposing the subpixels representing the m-th view (m is a natural number of k or less) is a 2D / 3D Video display device.
Wherein the lens region is cut in a columnar shape so as to have a sloped cross section in the same direction as the shifted direction of the opening.
In the 3D driving, the sub pixels corresponding one-to-one with the opening provided in the first horizontal line represent a plurality of views,
When the subpixel is opened through two adjacent openings, the subpixel opened through the two adjacent openings displays a black or gray image,
The subpixels provided on the second horizontal line display a black or gray image,
A method of driving a 2D / 3D image display device in which all subpixels display an image at the time of 2D driving.
In the 3D driving, 2D / 3D (k is a natural number) in which k views (k is a natural number of 2 or more) are alternately displayed on the subpixels corresponding to the openings located in the two first horizontal lines, A method of driving a video display device.
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