KR20030083877A - Auto stereoscopic display - Google Patents

Abstract

PURPOSE: An automatic three-dimensional image display system is provided to allow a viewer or user to watch vivid three-dimensional images without using an additional device. CONSTITUTION: An automatic three-dimensional image display system includes a back light unit for generating lights, a display panel(110), an achromates(120), a screen(130), and a virtual viewing zone(Z). The display panel is arranged in front of the back light and composed of a condenser lens and an LCD panel. The LCD panel is divided into a plurality of working regions. The achromates is located in front of the display panel and includes a plurality of objective lenses that respectively correspond to the working regions of the LCD panel. The screen is placed in front of the achromates. The line extended from the center of each of the objective lenses is focused on the center of the screen. The virtual viewing zone is located in front of the screen.

Description

Auto stereoscopic display device

The present invention relates to an automatic stereoscopic image display apparatus, and more particularly, to an automatic stereoscopic image display apparatus that enables a viewer to realistically stereoscopically view an image photographed by a camera without using an additional auxiliary means.

In general, the three-dimensional image display device refers to a device for three-dimensional recognition of the image by projecting the image viewed in different directions to the left and right eyes using the parallax of the two eyes of the viewer. As described above, there are two methods of separating an eye image using a spectacle shift mode using a color difference, a polarization difference, and a time difference, and an autostereoscopic fix field view using a special optical component. In this case, the stereoscopic view is recognized by wearing glasses having optical characteristics such as the image of the projected left and right eyes or shutter glasses that are opened and closed at the same cycle as the image of the projected left and right eyes. In this case, since the user can move while wearing the glasses, the glasses play a role of movement. On the other hand, in the fixed viewing method, the viewing area is formed on the front of the screen on which the image is projected, and is given to the image of the output opening of the projection optical system that projects the image corresponding to the left and right eyes by the screen. Headtracking is possible in part but limited in scope. In addition, as a three-dimensional image display device using the polarization characteristics to date there is a glasses method using a polarized glasses and a glasses-free method using a polarizing band plate. Such conventional stereoscopic image display apparatuses and methods are disclosed in US Patent No. 5,132,839, Korean Patent Publication Nos. 1999-72513, 2000-4296, 2001-103100, and the like.

However, various conventional stereoscopic image display apparatuses and methods thereof have been shown to have various problems. First, in the case of the polarizing glasses method, it is inconvenient to wear the glasses essentially, and even if the user rotates the head slightly from side to side, there is a problem in that the image in the polarization direction is mixed and the stereoscopic feeling is lost.

In the case of the polarizing band plate, it is difficult to set the corresponding relationship between the distance between the polarizing band plate and the liquid crystal display panel, the width of the polarizing band, and the pixel line width of the liquid crystal display panel.

In addition, in the case of the projection-type fixed viewing type stereoscopic image display device, the use of a focusing lens is required, and the position of the light source and the focusing lens must be accurate because the method of forming the dead zone by the image of the light source is required, The image should be formed in the opening of the projection lens correctly, and if the images of the two light sources are not superimposed exactly, the left and right viewing areas are intermittent, so that when the user moves the gaze, a dark part is generated and a clear stereoscopic image cannot be obtained.

Accordingly, the present invention has been invented to solve the above-described problems, and an object of the present invention is to provide an automatic stereoscopic image display apparatus in which a user or a viewer can watch a clear stereoscopic image without providing a separate means.

1 is a schematic diagram showing an automatic stereoscopic image display system and method thereof according to the present invention.

Figure 2 shows the state before and after the application of the vertical diffuser.

3 is a schematic diagram showing the alignment of three-dimensional data on a screen;

Figure 4 is a side view showing the alignment of a low cost four-sided automatic stereoscopic image display according to the present invention.

Figure 5 is a perspective view showing the alignment of a low-cost four-sided automatic stereoscopic display in accordance with the present invention.

Figure 6 (a), (b) is a view showing a division method of the LCD screen.

♣ Explanation of symbols for the main parts of the drawing ♣

10: camera 20: projector

30: magnifying lens 40: display

100: backlight 110: display panel

120: colorless lens 130: screen

These objects include a screen forming a pupil, refractive means for deflecting light beams, and an LCD panel, wherein the display area of the LCD panel is divided into multiple parts, each of which has suitable illumination means, light concentrating And projection objective lenses are provided to form a plurality of image projectors, wherein the image projectors are superimposed on the screen by means of light beam refraction means in such a way that the visible positions of the projected objects are evenly distributed in a horizontal direction at a predetermined level. It can be achieved by an autostereoscopic display device characterized in that it is configured to project images.

In addition, the above objects are an apparatus for automatically stereoscopically displaying an object or a stereoscopic image, comprising: a plurality of backlights for providing light; A display panel disposed in front of the backlight and configured of a thin plate type condenser lens and an LCD panel contacting the condenser lens, wherein the display panel is divided into a plurality of working areas; A colorless lens installed in front of the display panel, the colorless lens including a plurality of objective lenses corresponding to respective working areas of the display panel; A screen installed in front of the colorless lens and having a center extension line of each of the objective lenses focused in the center; And it can be achieved by the automatic stereoscopic image display device comprising a virtual viewing zone installed in front of the screen.

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

First, the principle of the technical idea according to the present invention is based on projecting an object in perspective three-dimensionally on the screen of the direction detecting function. This means that multiple perspectives of three-dimensional objects or images are projected from slightly different positions on a particular screen at the same time. This is a well-known principle of multifaceted perspective.

First, the basic principle according to the invention is that when the projector sees an image focused on the lens surface, the lens shines with bright spots on the other side. This light emitting point is actually a gap in the object lens of the projector that is irradiated. And this projected image is only illuminated brightly when the viewer's eyes are precisely located in the image of the crevice, and is shown entirely. This is called the viewing zone, and the viewer can move somewhat freely within the viewing zone depending on the size of the projector's object and how uniformly it is irradiated. For example, if the cameras or projectors distributed at different positions project different images from different positions, the visual field is also correspondingly displayed in space. Thus, the viewer can see the image differently from different locations. Since the viewer's left eye is about 65mm away from the right eye, the viewer can see different images with enough left and right eyes to create a three-dimensional illusion without the use of any glasses. As an example of this view, four projectors on the horizontal plane create four rounded blind spots, where the material for the projector is prepared by using stereoscopic animation software, which is a series of frames. will be. Of course, each stereoscopic image is taken with a virtual camera at a different location and stored on a hard disk of a computer.

The above description will be described with reference to FIG. 1, and includes a plurality of cameras 10 for capturing a three-dimensional scene such as an actual three-dimensional object or three-dimensional animation from various angles. Each of these cameras 10 is preferably formed of a virtual camera.

Each camera 10 is connected to an image projector 20, respectively. Each image projector 20 is preferably arranged equal to the photographing angle of each camera 10 corresponding thereto.

In addition, in front of each projector 20, a magnification lens 30 is provided for mixing the images projected from the projector to represent a real 3-D image, that is, a stereoscopic image. This magnifying lens 30 will eventually serve as a screen.

According to the configuration of such an autostereoscopic display, the viewer V can watch the scene photographed by each camera 10 in a stereoscopic jug, and in particular, while the viewer moves in three dimensions with respect to the stereoscopic image, In the case of watching an image, a stereoscopic image can be viewed at each position actually taken by each camera.

Meanwhile, as shown in FIG. 2, when a diffuser is actually used in the viewing zone Z viewed by the viewer V, the garden-like image may be converted into an elliptical image. That is, in order to increase the degree of freedom of viewers viewing in the vertical direction, a special detection diffuser must be disposed together with the lens. Here, the diffuser should emit light only in the vertical direction and the blind spot will be increased vertically as shown in FIG. Of course, the horizontal division between the blind spots will remain the same.

As shown in FIG. 3, when looking at the stereoscopic image arrangement structure on the display, each camera 10 disposed at a predetermined angle at a predetermined position with respect to the 3-D scene as described above is shown. Each image captured by (10a; 10b; 10c10d) is divided into respective portions of the display 40 to appear. That is, the display 40 is provided with a plurality of picture regions for representing images or pictures taken by each camera. That is, the display 40 may include a first picture area 40a corresponding to an image captured by the first camera 10a and a second picture area 40b corresponding to an image captured by the second camera 10b. , The third picture area 40c corresponding to the image photographed by the third camera 10c, and the fourth picture area 40c corresponding to the image photographed by the fourth camera 10d. As a result, in order to reduce the cost of the display 40, one LCD panel from the LCD monitor is used to make several LCD cameras. The LCD window should actually be divided into individual parts showing a unique picture for the 15 inch LCD window as shown in FIG.

4 shows a layout of a stereoscopic display optical system constrained to an economically useful freonel lens according to the invention, and FIG. 5 shows a corresponding perspective view. As a result, the autostereoscopic display apparatus according to the present invention includes a backlight 100 for providing light to a display which will be described later in more detail. Such a backlight 100 is typically provided with a plurality.

The display panel 110 is installed in front of the backlight 100. The display panel 110 includes a thin condenser lens 112 and an LCD panel 114 provided in a manner of being attached to or in contact with the condenser lens 112. Of course, the LCD panel 114 is partitioned into a plurality of work areas 114a; 114b; 114c; 114d respectively corresponding to the four picture areas as described above, for example, and also disposed of the waste area on each side of the upper and lower portions. 114e; 114f).

A plurality of achromates 120 are installed behind the display panel 110 at a predetermined distance. The colorless lens 120 includes an objective lens 120a; 120b; 120c; 120d corresponding to each working area 114a; 114b; 114c; 114d.

Behind the colorless lens 120, that is, the rear of each objective lens (120a; 120b; 120c; 120d) is provided with a screen 130 in which each center extension line is focused in the center. The screen 130 is preferably made of a combination of two Freonel lens and lenticular lenses.

According to such a configuration, the viewing zone Z for viewing the image made by the viewer focused on the screen 130 is formed at a rear of the screen 130. Of course, the viewer is understood that the viewer or his eyes in this viewing zone (Z) can accurately watch the stereoscopic image.

Meanwhile, as shown in FIG. 5, the two picture areas or work areas 114b and 114d in the upper part of the rectangle in the LCD panel 114 are moved to the right with respect to the two work areas 114a and 114c in the lower part. Therefore, the LCD panel 114 has a plurality of portions which are not actually used, that is, portions such as the waste areas 114e and 114f.

Optionally, as shown in Figs. 6A and 6B, another manner of LCD screen segmentation provides better horizontal resolution of each working area 114a, 114b, 114c, 114d. However, in order to move the lens horizontally, a beam deflector must be provided in front of the colorless lens 120. Reflecting means (i.e. mirrors) for such a beam deflector are already well known and used, and detailed description thereof is omitted in the present embodiment. However, in the autostereoscopic display according to the invention it is also possible to use other refractors in place of the beam deflectors or in place of the reflecting means.

As described above, the automatic stereoscopic image display apparatus according to the present invention comprises a screen forming a pupil, a deflection means for deflecting light beams, and an LCD panel, wherein the display area of the LCD panel is divided into multiple parts, each part of which is These fields are provided with suitable illumination means, light concentrators and projection objectives to form multiple image projectors, in which the visible positions of the projected objects are uniformly distributed in the horizontal direction at a constant level. And to project images superimposed on the screen via light beam refraction means. Here, the deflecting means includes a pair of articulated wedges which are installed spaced apart from each other at a predetermined distance and are rotated about one another at an angle of 180 degrees to compensate for deflection of the angled beam. And, the pair of deflection wedges includes two Fresnel wedge arrays or two colorless wedges. In addition, the irradiation means is such that the image includes one light source multiplexed by a system of planar mirrors.

Hereinafter, the operation mode of the automatic stereoscopic display device according to the present invention configured as described above will be described in detail.

First, an image at each angle in which a three-dimensional scene such as a real three-dimensional object or three-dimensional animation is shot by a plurality of virtual cameras 10 is projected onto a condenser lens and an LCD panel by a projector. do. That is, the image photographed by the first camera 10a is in the first picture region 40a, the image photographed by the second camera 10b is in the second picture region 40b, and the third camera 10c. The image photographed by is projected on the third picture region 40c, and the image photographed by the fourth camera 10d is projected on the fourth picture region 40c.

As described above, each working area 114a; 114b; 114c; 114d of the display panel 110 including the thin-shaped condenser lens 112 and the LCD panel 114 provided in such a manner as to be attached to or in contact with the condenser lens 112. ) Is projected forward by each backlight (100).

The images in the respective working areas 114a; 114b; 114c; 114d of the display panel 110 viewed as described above constitute the colorless lens 120, and the objective lenses 120a; 120b; 120c corresponding to the respective working areas. Through 120d, it is focused in the center of the screen 130. At this time, the screen 130 is composed of a combination of two Freonnel lens and lenticular lens, the rear of the screen 130 a certain viewing distance for the viewer to watch the image made by focusing on the screen 130 ( Z) is formed. Accordingly, the viewer can accurately watch the stereoscopic image with his eyes in the viewing zone (Z).

As a result, the viewer can view 3-D or stereoscopic images more precisely and magnifiedly by using the visible region in which the viewing area of the viewing zone is enlarged, in particular, up and down.

As a result, according to the automatic image display apparatus according to the present invention, there is an effect that a user or viewer can freely watch a realistic stereoscopic image without providing a separate means.

While a preferred embodiment according to the present invention has been described above, it will be understood by those skilled in the art that various modifications and changes can be made without departing from the scope of the appended claims.

Claims (6)

A pupil forming screen, an optical beam deflecting refraction means and an LCD panel, wherein the display area of the LCD panel is divided into multiple parts, each of which has suitable illumination means, a light concentrator and a projection objective Is provided to form multiple image projectors, wherein the image projector is configured to project images superimposed on the screen via light beam refraction means in such a way that the visible positions of the projection object are evenly distributed in a horizontal direction at a predetermined grade. Automatic stereoscopic image display device characterized in that. 2. The automatic stereoscopic image of claim 1, wherein the deflection means includes a pair of refraction wedges which are installed to be spaced apart from each other at a predetermined distance and are rotated about one another at an angle of 180 degrees to compensate for deflection of angled beams. Display device. 3. The automatic stereoscopic display device of claim 2, wherein the pair of deflection wedges comprises two Fresnel wedge arrays. The automatic stereoscopic image display apparatus according to claim 2, wherein the pair of deflection wedges includes two colorless wedges. 2. An autostereoscopic display apparatus according to claim 1, wherein said irradiating means comprises a light source in which an image is multiplexed by a system of planar mirrors. An apparatus for automatically displaying an object or a stereoscopic image three-dimensionally, A plurality of backlights for providing light; A display panel disposed in front of the backlight and configured of a thin plate type condenser lens and an LCD panel contacting the condenser lens, wherein the display panel is divided into a plurality of working areas; A colorless lens installed in front of the display panel, the colorless lens including a plurality of objective lenses corresponding to respective working areas of the display panel; A screen installed in front of the colorless lens and having a center extension line of each of the objective lenses focused in the center; And And a virtual viewing zone installed in front of the screen.