KR20080090001A - Stereoscopic display apparatus - Google Patents

Abstract

A stereoscopic display device is provided to reduce the crosstalk by improving the arrangement of lenticular lenses, thereby improving the picture quality of a stereoscopic image. A display panel(110) includes a plurality of pixels arranged in row and column and directions. A lenticular lens substrate(120) is disposed on the display panel. The lenticular lens substrate includes a plurality of lenticular lenses(123). The lenticular lenses are arranged such that the lenticular lenses are sloped with respect to a column direction of the pixels. The pixels include at least one first pixel overlapping the lenticular lenses adjacent to each other, and second pixels other than the first pixel. The first pixel displays an image signal of white. An area of the first pixel is divided by a boundary line between the lenticular lenses adjacent to each other at an area ratio of 3:7.

Description

Stereoscopic Display Device {STEREOSCOPIC DISPLAY APPARATUS}

1 is a schematic view for explaining a conventional stereoscopic display device;

2 is a perspective view for explaining the structure of a stereoscopic display device according to the present invention;

3 and 4 are views for explaining the relationship between the structure of the display panel and the lenticular lens according to the present invention;

5 is a view for explaining the principle and effect of the stereoscopic display device according to the present invention.

Explanation of Signs of Major Parts of Drawings

100: stereoscopic display device 110: display panel

111: thin film transistor substrate 113: color filter substrate

115: liquid crystal layer 120: lenticular lens plate

121: transparent substrate 123: lenticular lens

200: observer 200a: left eye

  200b: right eye

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stereoscopic display device, and more particularly, to a stereoscopic display device in which crosstalk is reduced and the image quality of a stereoscopic image is improved.

One of the most commonly used methods for implementing a stereoscopic display technology is a method using binocular display. The method of using bilateral parallax is to express the image taken by the camera corresponding to the left eye and the image taken by the camera corresponding to the right eye on the same display module, and to make it enter the viewer's left eye and the right eye, respectively. By inputting images observed from different angles to the eyes, the viewer can recognize the sense of space through the brain.

In this case, a method of dividing the image into the viewer's left eye and the right eye may be divided into a method of using a barrier and a method of using a lenticular lens, which is a kind of cylindrical lens. .

1 is a block diagram illustrating a three-dimensional display device using a lenticular lens according to the prior art, which is a view for explaining the principle that crosstalk phenomenon occurs.

As shown in FIG. 1, the stereoscopic display device 1 includes a display panel 10 including display pixels 12 arranged in rows and columns, and a lenticular lens disposed on the display panel 10. The plate 20 is included. Here, the lenticular lens plate 20 is composed of a plurality of lenticular lenses 22 having a shape of a substantially semi-circular column extending in one direction. The lenticular lens 22 is arranged to be inclined at a predetermined angle with respect to the column direction of the plurality of pixels 12. As such, the reason for arranging the lenticular lens 22 to be inclined with respect to the column direction of the plurality of pixels 12 is to minimize the moire phenomenon occurring when the stereoscopic image is implemented and to improve the image quality of the stereoscopic image. .

Here, the lenticular lens 22 is disposed to be inclined with respect to the column direction of the plurality of pixels 22, so that some pixels 12 (A of FIG. 1) are positioned to overlap with the boundary line between the lenticular lenses 22. Can be.

However, in this case, the image information (R, G, B) of the pixel 12 (A of FIG. 1) positioned to overlap the adjacent lenticular lens 22 is partially observed by the two lenticular lenses 22. The left eye of will be the left eye of the observer. That is, the image of the pixel 12 (A of FIG. 1) is not exactly separated from each other by the lenticular lens 22, and the image of the pixel 12 (A of FIG. 1) is provided to both the left eye and the right eye of the observer. There is a problem that crosstalk phenomenon occurs. As a result, the image quality of the stereoscopic image is deteriorated.

Accordingly, it is an object of the present invention to provide a stereoscopic display apparatus in which crosstalk is reduced and the image quality of stereoscopic images is improved.

According to the present invention, there is provided a display panel including a plurality of pixels arranged in rows and columns; A lenticular lens plate disposed on the display panel, the lenticular lens plate including a plurality of lenticular lenses disposed to be inclined with respect to the column direction of the plurality of pixels, wherein the plurality of pixels are disposed to overlap the lenticular lenses adjacent to each other. And at least one first pixel and a second pixel other than the first pixel, wherein the first pixel comprises displaying a white image signal.

Here, the area ratio of the first pixel separated by the boundary line between the lenticular lenses adjacent to each other may be substantially 3: 7 to 7: 3 ratio.

The display panel includes: a color filter substrate in which any one of red, green, blue, and white color filters is formed in each of the plurality of pixels; A thin film transistor substrate may be disposed opposite to the color filter substrate and may include a plurality of thin film transistors for driving each of the plurality of pixels, and the first pixel may include a white color filter.

In addition, the lenticular lens may be disposed to overlap at least three pixels arranged in the row direction.

At least one of the lenticular lenses may be disposed to overlap at least two second pixels and at least one first pixel arranged in a row direction.

Here, the lenticular lens may have a substantially semi-circular shape extending in one direction.

The second pixel may include any one of red, green, and blue color filters.

In addition, the lenticular lens may be inclined at an acute angle with respect to the column direction of the plurality of pixels.

The display panel may include a liquid crystal display panel, a plasma display panel, and an organic light emitting display panel.

SUMMARY OF THE INVENTION An object of the present invention is a display panel comprising a plurality of pixels arranged in rows and columns in accordance with the present invention; A lenticular lens plate disposed on the display panel, the lenticular lens plate including a plurality of lenticular lenses disposed to be inclined with respect to a column direction of the plurality of pixels, wherein at least one of the plurality of pixels includes a boundary region of the lenticular lens adjacent to each other; And a lenticular lens positioned at and positioned so as to overlap at least three pixels arranged in a row direction.

Here, at least one of the plurality of lenticular lenses is disposed to overlap at least two second pixels and at least one first pixel arranged in a row direction, and the second pixel is any one of red, green, and blue color filters. The first pixel may be positioned at a boundary of the lenticular lens and may include a white color filter.

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

In the stereoscopic display apparatus 100 according to the present invention, as shown in FIGS. 2 and 4, a display panel 110 displaying image information and a display panel 110 are disposed on the display panel 110. And a lenticular lens plate 120 for supplying the image information generated at 110 to the left eye 200a or the right eye 200b of the observer 200.

First, as illustrated in FIG. 4, the display panel 110 includes a thin film transistor substrate 111 having a thin film transistor T and a color filter substrate 113 disposed to face the thin film transistor substrate 111. And a liquid crystal layer 115 positioned between the thin film transistor substrate 111 and the color filter substrate 113.

As illustrated in FIG. 4, the thin film transistor substrate 111 may include a data line (not shown) and a gate line (not shown) arranged to cross each other on the first insulating substrate 111a and the first insulating substrate 111a. (Not shown), the thin film transistor T formed at the intersection of the data line and the gate line, the passivation film 111b covering the data line, the gate line, and the thin film transistor T, and the passivation film 111b. The pixel electrode 111c. Here, an area formed by the intersection of the data line and the gate line is defined as pixels Pixel and P. In FIG.

As shown in FIG. 4, the color filter substrate 113 includes a second insulating substrate 113a, a black matrix 113b provided in a matrix shape on the second insulating substrate 113a, and a black matrix 113b. And an overcoat film 113d and a common electrode 113e which are sequentially formed on the color filter layer 113c and the black matrix 113b and the color filter layer 113c formed between the regions. Although not specifically illustrated, the black matrix 113b is provided to correspond to the gate line, the data line, and the thin film transistor T of the thin film transistor substrate 111. And the color filter layer 113c is provided in the position corresponding to each pixel P mentioned above. In addition, the color filter layer 113c is provided with any one of the color filters R, G, B, and W of red, green, blue, and white. Specifically, the color filter layer 113c positioned to overlap the boundary region between the lenticular lenses 123 described later is provided to include a white color filter W. FIG.

The liquid crystal layer 115 is a material having dielectric anisotropy. In the liquid crystal layer 115, an arrangement state of the liquid crystal molecules constituting the liquid crystal layer 115 is controlled according to an electric field formed between the pixel electrode 111c and the common electrode 113e. Accordingly, the transmittance of light passing through the liquid crystal layer 115 is controlled.

Meanwhile, in the above description, the liquid crystal display panel is described as an example. However, the display panel 110 according to the present invention is not limited thereto, and both a plasma display panel (PDP) or an organic light emitting display panel (OLED) may be applied. .

Next, the lenticular lens plate 120 will be described.

The lenticular lens plate 120 is positioned on the display panel 110. As shown in FIG. 4, the lenticular lens plate 120 according to the present invention is formed on a transparent substrate 121 and a transparent substrate 121 and has a semi-cylindrical lenticular lens extending in one direction. , 123). The lenticular lens 123 may include a polymer organic material having high light transmittance. In this case, the lenticular lens 123 may be manufactured by coating a polymer organic material on the transparent substrate 121 and then patterning the polymer organic material into a semi-cylindrical shape extending in one direction. Such polymeric materials can be cured by ultraviolet (UV) light. Meanwhile, the lenticular lens 123 may be made of glass. The lenticular lens 123 may be made of the same material as the transparent substrate 121 and may have a structure of one body.

The lenticular lens 123 is disposed to be inclined at an acute angle with respect to the column direction of the plurality of pixels P. As illustrated in FIG. As such, the reason for arranging the lenticular lens 123 to be inclined with respect to the column direction of the plurality of pixels P is to minimize the moire phenomenon generated when the stereoscopic image is implemented and to improve the image quality of the stereoscopic image. .

In addition, the lenticular lens 123 is manufactured to have a constant curvature and pitch in order to provide the image information formed on the display panel 110 to the left or right eye. Accordingly, the image information displayed on the display panel 110 is changed into a left eye or a right eye by changing a progress path. The observer 200 views the stereoscopic image by binocular disparity through the separated image information.

On the other hand, the lenticular lens plate 120 according to the present invention is not only according to the embodiment described above, but also other lenticular lens plate 120 and the like configured to control the arrangement state of the liquid crystal molecules to perform the same function as the lenticular lens 123. Of course, the lenticular lens plate 120 of a known type and material can also be applied to the present invention.

Hereinafter, the relationship between the lenticular lens 123 and the pixel arrangement structure of the display panel 110 will be described in detail by dividing the paragraphs.

Next, an arrangement relationship between the pixel arrangement of the display panel 110, the pixel arrangement of the display panel 110, and the lenticular lens 123 will be described in detail with reference to the accompanying drawings.

As shown in FIG. 3, the display panel 110 having the above structure is divided into a pixel P which is an effective area in which an image is formed and a non-display area x in which an image is not formed. As described above, the plurality of pixels P are defined as regions formed by crossing the gate lines and the data lines, and are repeatedly arranged in the column and row directions. As shown in Fig. 4, the pixel P is provided with a pixel electrode 111c, a common electrode 113e, a color filter layer 113c, a liquid crystal layer 115, and the like, which are components for forming an image.

As illustrated in FIG. 3, the pixel P of the display panel 110 according to the present invention includes a first pixel P1 and a second pixel P2. Here, the first pixel P1 is disposed to overlap the lenticular lens 123 adjacent to each other, and more specifically, an area ratio separated by a boundary line between the lenticular lenses 123 corresponds to a ratio of a: b. Pixel P. Here, the area ratios (a: b) separated by the boundary lines between the lenticular lenses 123 are 3: 7 to 7: 3. The second pixel P2 is other than the first pixel P1, and although the second pixel P2 is disposed to overlap the boundary line between the lenticular lenses 123, the second pixel P2 is 3: 7 to 7: 3 by the boundary line between the lenticular lenses 123. The pixels P are not separated by the area ratio a: b.

Here, the reason for defining the first pixel P1 as the pixel P separated by an area ratio of 3: 7 to 7: 3 by the boundary line between the lenticular lenses 123 is as follows. In the first pixel P1, the images of the first pixel P1 are separated in different directions by the lenticular lens 123 adjacent to each other, and the image information of the first pixel P1 is divided into the left and right eyes of the viewer. When the separation ratio is within the range of 3: 7 to 7: 3, there is a high possibility that image information may be mixed and the image quality may be degraded by crosstalk. That is, the image information corresponding to the area ratio of 7 or less (in the case of the image information transmitted in the desired direction) may be insufficient to form a stereoscopic image by mixing with the image information of another pixel P, and the area ratio corresponds to 3 or more. This is because the image information (in the case of image information transmitted in an undesired direction) has a large specific gravity and may produce unwanted image information when image information of different pixels P is mixed.

However, if the ratio of the image information of the first pixel P1 to the left eye and the right eye of the observer is other than 3: 7 to 7: 3, even if mixing of the image information occurs, the ratio of mixing on either side is small and crosstalk. Is not likely to deteriorate the image quality. That is, the image information having an area ratio of 7 or more (in the case of image information transmitted in a desired direction) is sufficient to form a stereoscopic image by mixing with image information of another pixel P, and having an area ratio of 3 or less. This is because the image information (in the case of the image information transmitted in an undesired direction) is small so that the desired image information can be formed even when the image information of the other pixels P is mixed.

Therefore, the present invention defines only the pixel P, which may be degraded due to image mixing, as the first pixel P1, thereby preventing crosstalk from occurring by the first pixel P1. The pixel arrangement structure of the display panel 110 is improved.

Here, in order to prevent crosstalk from occurring by the first pixel P1, as illustrated in FIG. 3, the first pixel P1 is provided to display a white image signal. In contrast, the second pixel P2 is configured to display one of red, green, and blue video signals in order to implement a stereoscopic image.

That is, the color filter layer 113c corresponding to the first pixel P1 is formed of a white color filter, and the color filter layer 113c corresponding to the second pixel P2 is one of red, green, and blue color filters. It consists of either. As a result, the light passing through the first pixel P1 becomes white while passing through the white color filter, thereby displaying white image information.

Since the first pixel P1 is provided so that the image information of white is displayed, even if the image information of the first pixel P1 is separated and supplied to both the left eye 200a and the right eye 200b, the cross is caused by the mixing of the image information. Crosstalk is minimized. That is, even if the image information of the first pixel P1 is provided in an undesired direction and mixed with the image information of another pixel P, the image information of the first pixel P1 has only white image information, so that the other pixels (P) The picture information is not distorted. Rather, the luminance of the image information of the other pixel P is improved. Accordingly, the occurrence of crosstalk is reduced, and the image quality and luminance of the stereoscopic image are improved.

Meanwhile, when the image information of the first pixel P1 is provided in a desired direction, since the first pixel P1 displays only the image information of white, it is mixed with the image information of another pixel P to form a desired stereoscopic image. You can't.

In order to solve this problem, as shown in FIGS. 3 and 5, the lenticular lens 123 should be disposed to overlap at least three pixels P arranged in the row direction. Here, the three pixels P are three second pixels P2 having a color filter of blue, green, or red. Alternatively, when the first pixel P1 is included in the three pixels P, the three pixels P include at least two second pixels P2. That is, the pixel P overlapping the lenticular lens 123 should be disposed to include at least two second pixels P2. This is because when one second pixel P2 overlaps the lenticular lens 123, a stereoscopic image may not be formed. In this case, at least two second pixels P2 should be mapped to form a stereoscopic image by binocular dimensionality together with other second pixels P2 present at different positions.

Specifically, as shown in FIG. 5, three second pixels P2 and one first pixel P1 overlap one lenticular lens 123, and one other first pixel P1 is overlapped. It will be described on the assumption that the case is provided to overlap the boundary region of the adjacent lenticular lens 123 as follows. In the structure shown in FIG. 5, the pixel arrangement structure of the display panel 110 and the lenticular lens 123 are formed to form a parallax image as shown in the right side of FIG. 5. Accordingly, even if the white image signal of the first pixel P1 is provided, the observer sees the stereoscopic image by the first and third perspective images. The second parallax image secures the stereoscopic image formed by the first and third perspective images. Meanwhile, the luminance is improved by the white image signal of the first pixel P1. Accordingly, not only the stereoscopic image is implemented but also the image quality is improved. Here, by adjusting the pitch of the lenticular lens 123 to widen the viewing zone of the second parallax image, the stereoscopic image formed by the first and third perspective images can be further complemented.

Meanwhile, although not specifically illustrated, at least two second pixels P2 are provided to overlap the lenticular lens 123. In this case, the second parallax image has no effect. In this case, the stereoscopic image can be implemented, but the image quality is not good compared to the case where the number of perspective views is large. Therefore, it is preferable to manufacture the stereoscopic display apparatus 100 to have a large number of perspective views in the range in which the pixel P can be mapped and the control of the separated image information is possible in order to implement a stereoscopic image. However, since the manufacturing cost may increase when the parallax view is increased, it is preferable to map the stereoscopic image by the appropriate perspective view number.

Although embodiments of the present invention have been described above with reference to the accompanying drawings, those skilled in the art to which the present invention pertains may implement the present invention in other specific forms without changing the technical spirit or essential features thereof. I can understand that. Therefore, the embodiments described above are exemplary in all respects and do not limit the scope of rights.

As described above, according to the present invention, there is provided a stereoscopic display apparatus in which crosstalk is reduced and the image quality of a stereoscopic image is improved.

Claims (11)

A display panel including a plurality of pixels arranged in rows and columns; A lenticular lens plate disposed on the display panel, the lenticular lens plate including a plurality of lenticular lenses disposed to be inclined with respect to a column direction of the plurality of pixels, The plurality of pixels includes at least one first pixel disposed to overlap the lenticular lens adjacent to each other, and a second pixel other than the plurality of pixels, And the first pixel comprises displaying a white image signal. The method of claim 1, And the area ratio of the first pixel separated by the boundary line between the lenticular lenses adjacent to each other is substantially in the ratio of 3: 7 to 7: 3. The method of claim 1, The display panel, A color filter substrate on which one of red, green, blue, and white color filters is formed in each of the plurality of pixels; A thin film transistor substrate attached to the color filter substrate and including a plurality of thin film transistors for driving each of the plurality of pixels; And the first pixel includes the white color filter. The method of claim 1, And the lenticular lens is disposed to overlap at least three pixels arranged in a row direction. The method of claim 4, wherein And at least one of the plurality of lenticular lenses is disposed to overlap at least two of the second pixels and at least one of the first pixels arranged in a row direction. The method of claim 1, And the lenticular lens has a substantially semi-cylindrical shape extending in one direction. The method of claim 1, And the second pixel includes any one of the red, green, and blue color filters. The method of claim 1, And the lenticular lens is disposed to be inclined at an acute angle with respect to the column direction of the plurality of pixels. The method of claim 1, The display panel includes a liquid crystal display panel, a plasma display panel, and an organic light emitting display panel. A display panel including a plurality of pixels arranged in rows and columns; A lenticular lens plate disposed on the display panel, the lenticular lens plate including a plurality of lenticular lenses disposed to be inclined with respect to a column direction of the plurality of pixels, At least one of the plurality of pixels is located at a boundary region of the lenticular lens adjacent to each other, and includes a white color filter. And the lenticular lens is disposed to overlap at least three pixels arranged in a row direction. The method of claim 10, At least one of the plurality of lenticular lenses is disposed to overlap at least two second pixels and at least one first pixel arranged in a row direction. And the second pixel includes one of red, green, and blue color filters, and the first pixel is positioned at a boundary of the lenticular lens and includes a white color filter.

Images