KR100271276B1 - Stereoscopic display system for polaroid type - Google Patents

Abstract

The disclosed three-dimensional image display device relates to the implementation of a highly efficient three-dimensional image using only one liquid crystal display device without using a semi-reflective mirror.

The stereoscopic imaging apparatus using a polarization method according to the present invention includes a stereo camera unit for photographing a subject for a left eye and a right eye at different angles with at least one camera, and a dual scan liquid crystal image for a left eye and a right eye image captured by the stereo camera unit. Left-eye image output from the stereoscopic image display unit is composed of a three-dimensional image display unit that is input through the display device to the mutual polarization direction is 90 ° difference and then mixed and displayed, and a polarizing plate having a 90 ° difference polarization direction Is composed of polarized glasses that deliver only to the observer's left eye and the right eye's image, respectively.

Therefore, the device of the present invention has the advantage that the configuration of the three-dimensional image device is simple and light and short compared with using the liquid crystal display device for the left and right eyes separately with the half reflector.

Description

Stereoscopic Imaging Device by Polarization Method

The present invention relates to an image display device for implementing a three-dimensional image.

More particularly, the present invention relates to a stereoscopic imaging apparatus using a polarization method that can realize a high-efficiency three-dimensional image using only one liquid crystal display device (hereinafter referred to as an LCD device) without using a semi-reflective mirror.

Recently, as the demand of the times due to the rapid development of the technology of the image display field, the realization of the stereoscopic image that can maximize the visual effect through the eye that receives the largest amount of information among the human senses has been attempted in various ways. Progress is also taking place at a rapid pace.

The current technology of stereoscopic image enables the user to experience simulations, games, advertisements, and even virtual reality that does not exist in the real world by using artificial images mathematically synthesized by computer.

The principle of realizing such a stereoscopic image is to realize binocular parallax for representing the depth of view of an object by two human eyes. The polarization-based stereoscopic imaging apparatus is an example of this principle. The left and right images displayed through the polaroid filter are respectively transmitted to the left and right eyes through another polarization filter such as polarized glasses having the same polarization angle.

As an example of implementing a stereoscopic image based on the principle described above, there is a Republic of Korea Patent Application No. 97-67523 dated December 10, 1997, the configuration is shown in FIG.

The stereoscopic imaging apparatus according to the conventional polarization method shown in FIG. 1 uses two LCD devices to display an image signal photographed for one left eye and one for right eye through a polarizing plate having a 90 ° difference in polarization direction. By mixing and reflecting the left and right images using the semi-reflective mirror and the total reflection mirror, the 3D stereoscopic image can be viewed simultaneously in both directions through polarized glasses, and the captured video signal can be stored and displayed as needed. It is supposed to be.

As a result, it was possible to display a stereoscopic image in two directions at the same time, thereby realizing a stereoscopic image device having a near 100% efficiency and using a liquid crystal display (LCD) instead of a cathode ray tube (CRT) as a display device. By using it, the size could be reduced.

However, the stereoscopic imaging apparatus according to the conventional polarization method implemented as shown in FIG. 1 has two problems because the LCD and the semi-reflective mirror must be used for the left eye and the right eye.

First, although the size of the device can be reduced to some extent compared to the case of using a cathode ray tube, the use of two LCD devices mounted at right angles and a semi-reflective mirror has a limitation on light and small size reduction. If you want to implement it becomes even more problematic.

In addition, the semi-reflector should be uniformly coated as a whole in order to realize the above-described action, but the degree of uniformity of the coating is also reduced as the coating surface becomes wider.

Accordingly, an object of the present invention is to provide a three-dimensional imaging device by a polarization method that can implement a three-dimensional image with the same efficiency as the conventional by using only one LCD device without using a semi-reflective mirror.

1 is a detailed block diagram illustrating an example of a stereoscopic imaging apparatus using a conventional polarization method;

2 is a schematic block diagram showing a stereoscopic imaging apparatus according to a polarization method of the present invention;

3 is a detailed block diagram illustrating an embodiment of FIG. 2;

4 is a schematic block diagram showing a dual scan LCD device;

5 is a conceptual view showing that the light is refracted when the metal coating on the LCD glass.

Explanation of symbols on the main parts of the drawings

100: stereo camera unit 200: stereoscopic image display unit

300: polarized glasses 400: image storage unit

110: CCD camera for the right eye 120: CCD camera for the left eye

210: dual scan liquid crystal display (LCD) device 220: retarder

230: PDLC 410: input interface unit

420: VCR 430: output interface unit

Features of the stereoscopic imaging apparatus according to the polarization method according to the present invention for achieving the above object is a stereo camera unit for photographing the subject for the left eye and right eye at different angles with one or more cameras, and the left eye taken by the stereo camera unit It consists of a stereoscopic image display unit which receives the images for the eye and the right eye through a dual scan liquid crystal display device, and mixes and displays the polarization directions by 90 °, and a polarizing plate having a polarization direction by 90 °. The left eye image output from the image display unit is configured of polarized glasses that delivers only the left eye of the observer and the right eye image to the observer's right eye, respectively.

Hereinafter, a preferred embodiment of a stereoscopic imaging apparatus using a polarization method according to the present invention will be described in detail with reference to FIGS. 2 to 5.

FIG. 2 is a schematic block diagram showing a stereoscopic imaging apparatus according to a polarization method of the present invention, and FIG. 3 is a detailed block diagram showing an embodiment of FIG.

As shown, the stereoscopic imaging apparatus according to the polarization method according to the present invention includes a stereo camera unit 100 for photographing a subject for left and right eyes at different angles with at least one camera, and the stereo camera unit 100 is photographed. One-eye and right-eye images are input through a dual-scan liquid crystal display device, and the three-dimensional image display unit 200 mixes and displays the polarization directions by 90 °, and the polarizing plates having a 90 ° polarization direction. The left eye image output from the stereoscopic image display unit 200 is configured as polarized glasses 300 which transmits only the left eye of the observer and the right eye image only to the observer's right eye, respectively. The left and right eye images captured by the camera unit 100 are stored in a predetermined medium, or the stereoscopic image display unit 2 stores the stored images. The image storage unit 400 may be further included.

Here, as shown in FIG. 3, the stereo camera unit 100 is implemented as one or more Charge Coupled Device (CCD) cameras. In general, the right eye CCD camera 110 corresponding to the right eye and the left eye of the observer, respectively, is illustrated. And the left eye CCD camera 120 are integrated.

The stereoscopic image display unit 200 divides one LCD panel into two parts and simultaneously drives independently to scan a dual scan LCD device 210 and one LCD panel divided into two parts of the dual scan LCD device 210. Retarder 220 converts the polarization direction of the light emitted from the side by 90 degrees, and the light passing through the retarder 220 and the non-passed light so that the viewer can see the left and right images in all parts of the screen. It is composed of a polymer dispersed liquid crystal (PDLC) 230 for mixing and outputting.

In addition, the stereoscopic image display unit 200 is arranged such that the LCD panel and the PDLC 230 meet the extended surface of the LCD panel and the extended surface of the PDLC 230 at a predetermined angle, and the retarder 220 is Only light coming from one side of the LCD panel divided into two parts forms a geometric configuration arranged to be incident on the PDLC 230.

Here, the LCD panel and the PDLC 230 may be disposed so that the extension surface of the LCD panel is parallel to the extension surface of the PDLC 230, but in this case, the PDLC 230 may be out of a range of mixing and scattering incident light. In this case, the observer may not be able to see the left and right images in all parts of the screen, so that the LCD panel and the PDLC 230 meet each other at a predetermined angle between the extension surface of the LCD panel and the PDLC 230. It was made.

For this reason, the predetermined angle formed by the LCD panel and the PDLC 230 forms an angle of about 45 ° in FIG. 3. In this case, the observer can enjoy the largest and most effective stereoscopic image.

However, in order for an observer to view a stereoscopic image through the PDLC 230, any angle may be sufficient as long as the extension surface of the LCD panel and the extension surface of the PDLC 230 meet at an acute angle of 90 ° or less.

The operation of the stereoscopic imaging apparatus according to the polarization method of the present invention having such components is as follows.

First, the right-eye CCD camera 110 and the left-eye CCD camera 120 correspond to the two eyes of a human and are separated from each other by a distance (about 65 to 75 [mm]) of the two eyes to capture images for the right eye and the left eye. It transmits to the dual scan LCD device 210 of the image display unit 200.

The dual scan LCD device 210 is a device that scans by dividing one LCD panel into two parts and simultaneously driving them independently. In some cases, the dual scan LCD device 210 may be configured as a plurality of LCD panels.

A typical dual scan LCD device is shown in FIG. 4 in a schematic block diagram, and is largely composed of an LCD interface 211 and an LCD panel 216.

Here, the LCD interface 211 is a video signal input unit 212 for receiving a video signal again, and an analog / digital converter (ADC unit) for converting analog video signals inputted through the video signal input unit 212 into digital data. 213, the memory unit 215 for storing the digital image data converted by the ADC unit 213, and not only control the above-described process but also generate and supply a control signal for driving the LCD panel 216. Control and drive unit 214.

In addition, the LCD panel 216 includes an upper LCD panel 216a and a lower LCD panel 216b for dual scanning, and is driven by the control and driver 214 of the LCD interface 211.

The LCD panel 216 illustrated in FIG. 4 is for high resolution (SXGA, 1280 × 1024), and the upper LCD panel 216a and the lower LCD panel 216b are driven by being divided by 1280 × 512.

Here, the '384 × 10ch' on the horizontal side is tripled to realize 1280 pixels of color, and means that there are 10 LCD driver ICs that drive each 384 pixels, which is 256 × 2ch on the vertical side. The same applies to '.

As described above, the right and left eye images transmitted from the stereo camera unit 100 are transferred to the upper LCD panel 216a and the lower LCD panel 216b via the LCD interface 211 of the dual scan LCD device 210, respectively. Is displayed.

Thereafter, the retarder 220 delays the polarization direction of the light emitted from the upper LCD panel 216a or the lower LCD panel 216b by 90 °, which allows the image to be displayed to be viewed through the polarized glasses 300. For sake.

PDLC 230 has a characteristic that the light passing through it in a state where the power is applied (direct mode) is straight, and the incident light is scattered and output in a state where the power is not applied (projection mode), the present invention In the device of FIG. 3, the light emitted from the upper LCD panel 216a and the lower LCD panel 216b is mixed in the projection mode in order to output the mixed light from the upper LCD panel 216a and the lower LCD panel 216b.

That is, the observer mixes the light that passes through the retarder 220 and the light that does not pass so that the viewer can view the left eye and right eye images on all parts of the screen.

When the stereoscopic image is output from the stereoscopic image display unit 200 through this process, the observer can enjoy the 3D image by the polarizing glasses 300.

Here, as illustrated in FIG. 5, when a film of a material having a different refractive index is formed on the surface of the LCD glass of the LCD panel 216, the direction of light is refracted in one direction, thereby reducing the viewing angle problem of the liquid crystal.

Since the viewing angle of the currently commercialized LCD is more than 120 ° left and right, up and down 90 °, even if the LCD panel 216 of the present invention is tilted by 45 ° as shown in FIG. In order to increase the level, as shown in FIG. 5, the surface of the LCD glass of the LCD glass panel 216 may have a metal coating 217 having a different refractive index.

The stereoscopic imaging apparatus according to the polarization method of the present invention as described above may further include an image storage unit 400 that operates according to an external command, and the image storage unit 400 may again be connected to the input interface unit 410. The output interface unit 430 and the VCR (420) can be configured, the operation is as follows.

First, the VCR 420 stores left and right eye images taken from the stereo camera unit 100 by an external command or outputs the stored images to the stereoscopic image display unit 200.

The input interface unit 410 serves as a signal interface between the stereo camera unit 100 and the VCR 420, and the output interface unit 430 provides a signal interface between the VCR 420 and the stereoscopic image display unit 200. Play a role.

As described above, according to the stereoscopic imaging apparatus using the polarization method according to the present invention, the LCD for left and right eyes together with the semi-reflective mirror can be realized by using only one LCD device without using a semi-reflective mirror to realize high-efficiency three-dimensional images. Compared with a device using a separate device, the configuration of the stereoscopic image device is simple and the effect of being light and light is reduced.

Claims (6)

A stereo camera unit for photographing a subject for left and right eyes at different angles with at least one camera; A stereoscopic image display unit which receives the left eye image and the right eye image captured by the stereo camera unit through a dual scan liquid crystal display so that mutual polarization directions are different by 90 °, and then displays the mixed and mixed images; And The left eye image output from the stereoscopic image display unit is composed of polarizing glasses that deliver only the left eye of the observer and the right eye image only to the observer's right eye, respectively. A stereoscopic imaging device using a polarization method characterized in that. The method of claim 1, According to an external command, the stereoscopic image by the polarization method may further include an image storage unit configured to store left and right eye images captured by the stereo camera unit on a predetermined medium, or output the stored image to a stereoscopic image display unit. Device. The stereoscopic image display unit of claim 1; A dual scan liquid crystal display which scans by splitting one LCD panel into two parts and simultaneously driving them independently; A retarder for converting a polarization direction of light emitted from one side of the LCD panel divided into two parts of the dual scan liquid crystal display device by 90 °; And And a PDLC for mixing and outputting light passing through the retarder and light not passing through so that an observer can view left and right images in all parts of the screen. The stereoscopic image display unit of claim 1 or 3; The LCD panel and the PDC are arranged such that the extended surface of the LCD panel and the PDC face each other at a predetermined angle. And the retarder is arranged such that only light emitted from one side of the LCD panel divided into two parts is incident on the PDC. The liquid crystal display of claim 1 or 3, wherein the dual scan liquid crystal display device; A stereoscopic imaging device according to a polarization method, characterized in that composed of one or more LCD panels. According to claim 3, wherein the LCD panel; A stereoscopic imaging apparatus using a polarization method, characterized in that a film of a material having a different refractive index is formed on the surface of an LCD glass.