KR100359023B1 - Apparatus of 3-Dimension Autosteroscopic Picture Display for Multimode - Google Patents

Abstract

The present invention relates to a multi-mode stereoscopic image display apparatus for displaying planar images and stereoscopic images.

The multi-mode stereoscopic image display apparatus of the present invention includes a video signal converter for converting a plurality of video signals, a backlight for generating light, a flat panel display for displaying an image using light incident from the backlight, and a flat panel display. Displayed three-dimensional images by separating the image of the flat panel display device into image information of the left eye and the right eye when different voltages are applied to the adjacent pixels, which are disposed in front of the device, and the adjacent pixels are alternately complementary to each other to have a complementary color relationship. When the same voltage is applied therein, a variable color barrier is provided so that the image of the flat panel display is transmitted as it is to display a planar image.

The multi-mode stereoscopic image display device having such a configuration displays a planar image and a stereoscopic image to implement a multimode according to a user's intention.

Description

Apparatus of 3-Dimension Autosteroscopic Picture Display for Multimode}

The present invention relates to a stereoscopic image display apparatus for displaying stereoscopic images, and more particularly, to a multi-mode stereoscopic image display apparatus for displaying planar images and stereoscopic images according to a user's selection.

A stereoscopic image display apparatus using ordinary stereoscopic glasses displays an image that an observer can see with the right eye (hereinafter referred to as a "right eye image") and an image that can be viewed with the left eye (hereinafter referred to as a "left eye image") on a stereoscopic screen. . The observer observes the right eye image and the left eye image displayed on the stereoscopic screen through the stereoscopic glasses, and then senses the stereoscopic feeling by synthesizing the right eye image and the left eye image in the head.

Referring to Fig. 1, a configuration of a conventional stereoscopic image display device is shown. The first camera 2a transmits only the r1 signal among the color signals r1, g1, and b1 to the display device 14. At this time, r1, g1, and b1 are red (referred to as "R"), green (hereinafter referred to as "G"), and blue (hereinafter referred to as "B") input to the first camera, respectively. ). The second camera 2b transmits only the g2 and b2 signals among the color signals r2, g2 and b2 to the display device 14. Accordingly, the r1, g2 and b2 signals appear on the display device 14. On the other hand, a red (R) filter is provided on the left side of the stereoscopic glasses 6 worn by the observer, and a cyan filter is provided on the right side. In this case, in addition to the combination of red (R) and cyan (C), the stereoscopic glasses may be implemented with a combination of two colors consisting of one color and its complementary color. For example, green (G) and magenta (M) or blue (B) and yellow (Y). When the viewer looks at the display device 14, the left eye EL detects an r1 signal among the color signals of the display device, and the right eye ER detects g2 and b2 signals among the color signals of the display device. In this case, the r1 signal becomes the left eye image and the g2 and b2 signals become the right eye image. At this time, the left eye image and the right eye image are synthesized in the head to feel a three-dimensional feeling. However, the conventional stereoscopic image display device is not only inconvenient to wear stereoscopic glasses in order to feel the stereoscopic image, but also has a problem that it is difficult to observe the stereoscopic image of the primary color.

Referring to FIG. 2, a stereoscopic image display device using a parallax barrier (Parallax Barrier) is illustrated. A parallax barrier 8 is provided between the observer and the display device 14. In the parallax barrier 8, an opaque part 8a and a transparent part 8b are alternately formed. The opaque portion 8a and the transparent portion 8b formed on the parallax barrier 8 may be formed in the form of a line, or may be formed in the form of a mosaic. On the display device 14, a first pixel P1 formed by a color signal input from a first camera (not shown) and a second pixel P2 formed by a color signal input from a second camera (not shown) are provided. Is indicated. In this case, when viewed from the left eye EL of the observer, the second pixel P2 is covered by the opaque portion 8a, so the first pixel P1 becomes a left eye image. On the other hand, when viewed from the observer's right eye ER, the first pixel P1 is covered by the opaque portion 8a, so the second pixel P2 becomes a right eye image. Accordingly, since different pixels are detected in the left eye image and the right eye image, the observer feels a three-dimensional effect. Normally, the opaque part 8a is coated in black, and as the multi-view becomes more black lines appear as the opaque part 8a increases than the transparent part 8b, and the brightness level of the screen This deterioration problem is derived.

As described above, in order to solve the problem of the stereoscopic image display apparatus using the parallax barrier 8, a color barrier is used. 3, the collar barrier will be described.

Referring to FIG. 3, the stereoscopic image display apparatus includes a video signal input unit 12 for inputting two different video signals, a video signal converter 16 for converting the input video signal into a predetermined form, and a conversion. A display device 14 for displaying an image corresponding to the received video signal and a color barrier 18 positioned at the front end of the display device 14 for sorting colors are provided. The image signal input unit 12 inputs two different image signals using the first and second cameras 12a and 12b. In this case, the image signal of the first camera 12a represents an image viewed from the left eye EL, and the image signal of the second camera 12b represents an image viewed from the right eye ER. In addition, the image signal input unit 12 may input different image signals for one pixel using computer graphics. The image signals r1, g1, and b1 input from the first camera 12a may be different from each other. The video signals r2, g2, and b2 input from the second camera 12b are mixed by the video signal converter 16. The display device 14 includes first and second pixels P1 and P2 that are alternately arranged to correspond to the video signals mixed by the video signal converter 16. The video signal of the first pixel P1 is composed of r1, g2, and b2, and the video signal of the second pixel P2 is composed of r2, g1, b1. The collar barrier 18 is provided in front of the display device 14 at a distance from the display device 14. In the color barrier 18, a red filter R and a cyan filter C, which are complementary color relationships C1 and C2, are alternately formed. On the other hand, the color barrier 18 may be implemented by a combination of two colors consisting of green (G) or blue (B) and its complementary colors (M, Y). In this case, the left and right eye data corresponding to the primary and complementary colors of neighboring pixels P1 and P2 are reversed in the image signals inputted to the pixels P1 and P2. Accordingly, the r1 signal of the first pixel P1 is transmitted to the left eye EL of the observer located at a predetermined distance from the color barrier 18 through the red filter 18R, and the cyan filter 18C Through this, signals g1 and b1 of the second pixel P2 are transmitted. On the other hand, the r2 signal of the second pixel P2 is transmitted to the observer's right eye ER through the red filter 18R ', and passes through the cyan filter 18C to the g2 of the first pixel P1. signal b2 is transmitted. That is, the observer's left eye EL sees only the left eye images r1, g1, b1 captured by the first camera 12a, and the right eye ER is the right eye images r2, g2 captured by the second camera 12b. only b2 is seen. From this, the observer can see one stereoscopic image from two image signals from the display device. In the stereoscopic image display device using the parallax barrier 8 shown in Fig. 2, two kinds of image signals alternately adjacent pixels. The parallax barrier 8 disposed in the fields P1 and P2 and positioned in front of the display device 14 allows the image signals corresponding to the two eyes of the observer to enter each other, and the other image signal is the parallax barrier. The luminance decrease is large as it is covered by the opaque portion 8a of (8). On the other hand, the three-dimensional image display device of the color barrier type shown in FIG. 3 allows the image signal corresponding to both eyes of the observer to enter and the color filters of the color barrier 18 as the viewer views the pixels P1 and P2. The information contained in) can be used as much as possible, so that stereoscopic images can be viewed with minimum reduction in luminance.

However, the stereoscopic image display apparatus using the color barrier 18 shown in FIG. 3 can display only the stereoscopic image 3D at all times regardless of the user's intention, and it is difficult to display the planar image 2D. As a result, there is an urgent need for a multi-mode stereoscopic image display device capable of selectively displaying planar images 3D and stereoscopic images 2D according to a user's intention.

Accordingly, an object of the present invention is to provide a multi-mode stereoscopic image display apparatus for displaying a planar image and a stereoscopic image according to a user's selection.

1 is a view showing the configuration of a conventional glasses type stereoscopic image display device.

2 is a view showing the configuration of a conventional glasses-free stereoscopic image display device.

3 is a view for explaining another example of a conventional glasses-free stereoscopic image display device.

4 is a view for explaining a change in wavelength transmitted according to a voltage applied to a liquid crystal.

5A and 5B are views showing the configuration of a multi-mode stereoscopic image display device according to an embodiment of the present invention.

FIG. 6 is a diagram illustrating the multi-dimensional stereoscopic image display device shown in FIG. 5 in detail.

7A and 7B are views showing the configuration of a multi-mode stereoscopic image display device according to another embodiment of the present invention.

8 is a diagram showing the configuration of a multi-mode stereoscopic image display device according to still another embodiment of the present invention.

9 is a diagram showing the configuration of a multi-mode stereoscopic image display device according to still another embodiment of the present invention.

<Description of Symbols for Main Parts of Drawings>

2,12 camera 6: stereoscopic glasses

8: parallax barrier 14,32: display device

16: video signal conversion unit 18: color barrier

34: variable color barrier 36: light scattering element

38: light source 40: polarizing plate

In order to achieve the above object, the multi-mode stereoscopic image display apparatus of the present invention displays an image using a video signal conversion unit for converting a plurality of video signals, a backlight for generating light, and light incident from the backlight. The three-dimensional image is obtained by separating the image of the flat panel display device into image information of the left eye and the right eye when a different voltage is applied to adjacent pixels arranged in front of the flat panel display, and adjacent pixels are alternately arranged in a complementary color relationship. And a variable color barrier for displaying a planar image by transmitting the image of the flat panel display device as it is when the same voltage is applied in the adjacent pixels. The variable color barrier is an ECB or gate-host. It is characterized in that it is produced using any one of the liquid crystal mode.

In accordance with another aspect of the present invention, a multi-mode stereoscopic image display apparatus includes a video signal converter for converting a plurality of video signals, a backlight for generating light, and a flat panel display for displaying an image using light incident from the backlight. The apparatus includes a color barrier in which adjacent pixels alternate with each other in a complementary color relationship, and a light scattering element disposed between the flat panel display and the color barrier. Depending on whether the voltage is applied to the device, the incident light is transmitted as it is to display a three-dimensional image or the incident light is scattered to display a planar image. The light scattering device is characterized in that it comprises a PDLC liquid crystal mode.

Other objects and features of the present invention in addition to the above objects will become apparent from the description of the embodiments with reference to the accompanying drawings.

A preferred embodiment of the present invention will be described with reference to FIGS. 4 to 9.

Referring to FIG. 4, there is shown a diagram for describing a change in wavelength transmitted according to a voltage applied to a liquid crystal cell. As shown in FIG. 4, the wavelength to be transmitted changes according to the voltage applied to the liquid crystal. For example, when 2.2V is applied, white light (hereinafter referred to as "W") light is transmitted. When 2.28V is applied, black light (hereinafter referred to as "Bk") light is transmitted. In addition, when 2.32V is applied, green light (hereinafter referred to as "G") light is transmitted, and when 2.35V is applied, red (Red (hereinafter referred to as "R")) is transmitted. As such, the device for changing the wavelength transmitted according to the voltage includes ECB (Electrically Controlled Birefringence) or Guest-Host (hereinafter referred to as "GH"). In the present invention, the multi-dimensional stereoscopic image for implementing the planar image (2D) and the stereoscopic image (3D) together using these elements is implemented.

5A and 5B illustrate a configuration of a multi-mode stereoscopic image display device according to an embodiment of the present invention. Referring to FIGS. 5A and 5B, the multi-mode stereoscopic image display device of the present invention displays a video signal. And a variable color barrier 34 disposed at the front end of the display unit 32 to change the transmission wavelength of the light beam according to the voltage. The multi-mode stereoscopic image display apparatus of the present invention has a variable color barrier. By applying a voltage to the (Variable Color Barrier) 34 to change the transmitted wavelength, the planar image 2D and the stereoscopic image 3D can be displayed. To this end, the variable collar barrier 34 has two modes. As shown in FIG. 5A, the first mode is a planar image mode in which a voltage of V = V0 is applied as a whole so that an observer can see an image of the display unit 32 as it is. Here, V0 is a voltage (2.2V in FIG. 4) that causes the variable color barrier 34 to show white. As shown in FIG. 5B, the second mode is a stereoscopic image mode. In order to separate image information of the display unit 32 into left and right eye information, image information on the display unit 32 is mutually connected to each of the adjacent pixels as shown in FIG. 3. The image information of the complementary colors C1 and C2 is displayed. In addition, different voltages (V1 and V2 in FIG. 5B) are applied to the variable color barrier 34 alternately with each other in areas C1 and C2 having complementary colors so as to correspond to the pixels of the display unit 32. For example, in FIG. 4, 2.35 V is applied to make the first complementary color region C1 a color barrier of red R out of two adjacent complementary color regions C1 and C2, and the second complementary color region C2. The voltage between 2.28V and 2.32V is applied to make C (Cyan) the complementary color of red (R). As can be seen from this, the multi-mode stereoscopic image display apparatus of the present invention displays stereoscopic images on the same principle as the stereoscopic image display apparatus shown in FIG.

As described above, the variable color barrier 34 separates the image information of the left eye and the right eye in response to a voltage to display the image of the display unit 32 as a planar image or a stereoscopic image according to a user's intention.

Referring to FIG. 6, there is shown a detailed view of the structure of the variable color barrier 34 and the display portion 32. As shown in FIG. 6, the display portion 32 is a liquid crystal panel 32 'for display. And first and second polarizing plates 40a and 40b disposed above and below the liquid crystal panel 32 'for display, respectively. The variable color barrier 34 is composed of third and fourth polarizing plates 40c and 40d disposed above and below the liquid crystal cell in the ECB 34 'mode and the liquid crystal cell in the ECB 34' mode, respectively. Since the second polarizing plate 40b and the third polarizing plate 40c have the same polarization property, one of them can be removed. When one of the second and third polarizing plates 40b and 40c is removed in this manner, the structure of the multi-mode stereoscopic display device becomes simpler.

7A and 7B, the multi-mode stereoscopic image display apparatus of the present invention includes a variable color barrier 34 and a variable color barrier 34 for changing a wavelength of light incident from a backlight (not shown) in response to voltage. And a display unit 32 arranged at a front end of the N-axis and displaying an image signal using white light incident through the variable color barrier 34 or light having mutual complementary colors (C1, C2). FIG. 7A and 7B. 5A and 5B, the position of the variable collar barrier 34 is changed and its operation and functions are the same. Therefore, detailed descriptions of the functions and operations of the respective parts will be omitted. As described above, the multi-mode stereoscopic image display device according to another embodiment of the present invention implements a multi-mode for displaying planar images and stereoscopic images by applying a voltage to the variable color barrier according to a user's intention. In addition, the configuration can be simplified by removing the polarizing plate having the same polarization characteristics.

8 and 9, a multi-mode stereoscopic image display device according to still another embodiment of the present invention will be described.

Referring to FIG. 8, a multi-mode stereoscopic image display device according to still another exemplary embodiment of the present invention includes a display unit 32 for displaying an image signal, and a scattering characteristic of a light beam according to a voltage disposed in front of the display unit 32. A variable light scattering element 36 for controlling the light scattering element 36 and a color barrier 34 " positioned at the front end of the variable light scattering element 36 for sorting the color. The scattering characteristics of the light beams are varied The variable light scattering element 36 preferably uses a polymer dispersed liquid crystal (PDLC) in which the scattering characteristics of the light beams are changed by an electric field, for example, when V = Vo. The variable light scattering element 36 scatters the light beam traveling at 32. As a result, the scattered light beam travels to the color barrier 34 " to display a planar image. When V = V1, the light beam propagated from the display unit 32 passes through the variable light scattering element 36 as it is. Accordingly, the light beam is incident on the color barrier 34 ". The color barrier 34" is a complementary color (C1, C2) relationship between the image information of the display unit 32 incident through the variable light scattering element 36. The adjacent pixels of are arranged so that the image information of the left eye EL and the right eye ER are separated as in the stereoscopic image display device of FIG. 3, so that the viewer can view the stereoscopic image 3D.

Referring to FIG. 9, a multi-mode stereoscopic image display device according to another embodiment of the present invention is a color for selecting light having a mutual complementary color (C1, C2) relationship from adjacent pixels in light incident from a backlight (not shown). A front end of the variable light scattering element 36 and a variable light scattering element 36 disposed at the front end of the barrier 34 "and the collar barrier 34" to scatter or transmit light incident thereon in response to a voltage; And a display unit 32 for displaying a video signal. In the configuration of FIG. 9, the position of the collar barrier 34 ″ is changed in the configuration of FIG. 8, and the detailed description thereof will be omitted because the operations and functions of the respective parts are the same. The mode stereoscopic image display device implements a multi-mode display of a planar image and a stereoscopic image by applying a voltage to the variable light scattering element according to a user's intention.

As described above, the multi-mode stereoscopic image display device of the present invention has an advantage of implementing a multi-mode displaying a planar image and a stereoscopic image according to a user's intention.

Those skilled in the art will appreciate that various changes and modifications can be made without departing from the technical spirit of the present invention. For example, in the exemplary embodiment of the present invention, a multi-mode for displaying a planar image and a stereoscopic image is possible in the case of two views, but it will be appreciated by those skilled in the art that this also applies to three views or multiviews. Therefore, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification but should be defined by the claims.

Claims (10)

In the three-dimensional image display device using a flat panel display device, A video signal converter for converting a plurality of video signals; A backlight for generating light, A flat panel display for displaying an image using light incident from the backlight; Displays a stereoscopic image by separating the image of the flat panel display into left and right eye image information when different voltages are applied to the adjacent pixels when the adjacent pixels are disposed in front of the flat panel display and are alternately complementary. And a variable color barrier that transmits the image of the flat panel display as it is and displays a planar image when the same voltage is applied in the adjacent pixels. The method of claim 1, And the variable color barrier is fabricated by using either ECB or gate-host liquid crystal mode. In the three-dimensional image display device using a flat panel display device, A video signal converter for converting a plurality of video signals; A backlight for generating light, A flat panel display for displaying an image using light incident from the backlight; A color barrier in which adjacent pixels are alternately arranged to have a complementary color relationship, A light scattering element disposed between the flat panel display and the color barrier, And displaying a three-dimensional image by transmitting incident light as it is, depending on whether or not the voltage of the light scattering element is applied, or displaying a planar image by scattering the incident light. The method of claim 3, wherein And the light scattering element comprises PDLC liquid crystal mode. delete delete delete delete delete delete