KR102013379B1 - Multi-View Holography 3D Display Device - Google Patents

Abstract

The present invention relates to a multi-screen holographic stereoscopic image display apparatus which simultaneously displays various display information on one panel. According to an aspect of the present invention, there is provided a thin-film flat panel multi-layer holographic stereoscopic image display device including a backlight unit; A spatial light modulation panel for dividing a frame of an image into n × 2 m (n and m are natural numbers) regions and alternately arranging a left eye hologram pattern and a right eye hologram pattern; And Eye Tracker. The present invention provides a high quality holographic stereoscopic image by dividing a spatial light modulation panel into multiple regions and providing a left eye holographic stereoscopic image and a right eye holographic stereoscopic image in different regions of one panel. .

Description

Multi-screen holography stereoscopic display device {Multi-View Holography 3D Display Device}

The present invention relates to a multi-screen holographic stereoscopic image display apparatus which simultaneously displays various display information on one panel. In particular, the present invention relates to a multi-screen holographic stereoscopic image display device that spatially divides one panel and divides a left eye image and a right eye image.

Recently, researches on three-dimensional (3D) image and image reproduction technology have been actively conducted. 3D image related media is expected to lead the next generation of image devices as a new concept of realistic image media that raises the level of visual information. Conventional 2D imaging systems provide planar images, but 3D imaging systems are the ultimate image rendering technology in view of showing the actual image information of objects to the viewer.

As a method for reproducing 3D stereoscopic images, methods such as stereoscopy, holography, and integral imaging have been researched and developed. Among them, the holography method is a method of observing a holography produced using a laser and feeling the same stereoscopic image as the real thing without attaching special glasses. Therefore, the holography method is known to be the most ideal way for the viewer to feel a three-dimensional image without fatigue and excellent stereoscopic feeling.

The holography method uses a principle of recording and reproducing an interference signal obtained by overlapping light reflected on an object (object wave) and coherent light (reference wave). A hologram is a recording of an interference fringe formed on a scattering film by forming an interference fringe formed by colliding an object wave scattered by an object with a reference wave incident in another direction using a highly coherent laser light. When the object wave and the reference wave meet, an interference fringe is formed by the interference, and the amplitude and phase information of the object are recorded together with the interference fringe. This is called holography to restore the stereoscopicity recorded in the hologram to the three-dimensional image by irradiating the reference light to the recorded interference fringe.

A computer generated hologram (CGH) has been developed as a method for generating a hologram by a computer for storing, transmitting and image processing. The computer-generated holograms have been developed in various ways so far. Recently, due to the development of the digital industry, a system for displaying computer-generated holograms of moving images is developed without remaining in the computer-generated holograms of still images.

Computer-generated holograms create interference fringes that are stored directly on the hologram using a computer. Computation of the interference fringe image generated by a computer, and then transmitted to a spatial light modulator such as a liquid crystal-spatial light modulator (LC-SLM), which irradiates a reference light to restore the stereoscopic image. Play it. 1 is a diagram showing the configuration of a digital holographic image reproducing apparatus implementing the computer-generated hologram method according to the prior art.

Referring to FIG. 1, an interference fringe image corresponding to a stereoscopic image to be implemented in the computer 10 is generated. The generated interference fringe is transmitted to the SLM 20. The SLM 20 may be formed of a transmissive liquid crystal display panel to display an interference fringe. On one side of the SLM 20, a laser light source 30 to be used as a reference light is positioned. The dilator 40 and the lens 50 are sequentially arranged in order to evenly project the reference light 90 emitted from the laser light source 30 onto the front surface of the SLM 20. The reference light 90 emitted from the laser light source 30 is irradiated to one side surface of the SLM 20 via the expander 40 and the lens 50. When the SLM 20 is a transmissive liquid crystal display panel, the 3D stereoscopic image 80 is displayed on the other side of the SLM 20 by the interference fringe of the hologram implemented in the SLM 20.

The holographic stereoscopic image display device of FIG. 1 is composed of components occupying a considerable volume, such as a light source 30, a expander 40, and a lens 50 generating the reference light 90. In the case of constructing such a system, since the volume is quite large and the weight is large, it is not suitable for the light and thin display device of the recent trend. Therefore, it is required to implement a holographic stereoscopic imaging system that realizes an ultimate stereoscopic image in an autostereoscopic manner in a thin film flat panel type.

SUMMARY OF THE INVENTION An object of the present invention is to overcome the above problems, and to provide a thin film flat panel holographic stereoscopic image display device. Another object of the present invention is to provide a stereoscopic image display apparatus of a thin film flat panel multi-screen holography type that provides high quality stereoscopic images by transmitting stereoscopic images using holography, respectively, to the left eye and the right eye. It is still another object of the present invention to simultaneously provide a left-eye image and a right-eye image in a spatial division scheme in one spatial light modulation panel, thereby providing high quality stereoscopic images without using expensive panels for high-speed processing and high-speed response. The present invention provides a three-dimensional image display device of a thin film flat panel holography method.

In order to achieve the object of the present invention, a thin film flat panel multi-screen holography stereoscopic image display apparatus according to the present invention, a backlight unit; A spatial light modulation panel for dividing a frame of an image into n × 2 m (n and m are natural numbers) regions and alternately arranging a left eye hologram pattern and a right eye hologram pattern; And Eye Tracker.

The eye tracker is characterized in that it comprises a vertical grating panel and a horizontal grating panel.

Storing the left eye hologram pattern and the right eye hologram pattern, respectively, dividing the left eye hologram pattern and the right eye hologram pattern into the n × 2m (n, m is a natural number) region, and the divided left eye Selecting a main area from the hologram pattern and the divided right eye hologram pattern to rearrange the main area of the left eye hologram pattern and the main area of the right eye hologram pattern to the divided area of the spatial light modulation panel; It further comprises a data processing device.

The left eye hologram pattern is characterized by not neighboring each other in the up, down, left, and right directions on the one frame divided into the n × 2m region (n and m are natural numbers).

The right eye hologram pattern is characterized by not neighboring each other in the up, down, left, and right directions on the one frame divided into the n × 2m region (n and m are natural numbers).

The backlight unit is characterized by providing a high collimation purity, excellent light coherence.

The multi-screen holographic display device according to the present invention includes a thin film flat panel backlight unit, a spatial light modulation panel, and a flat panel light deflection panel, thereby providing a thin film flat panel holographic stereoscopic image. In addition, the present invention transmits a stereoscopic image of the left eye holography system to the viewer's left eye, and transmits a stereoscopic image of the right eye holography system to the viewer's right eye to provide a high quality stereoscopic image. In addition, the present invention divides one spatial light modulation panel into multiple regions, and provides a left eye holographic stereoscopic image and a right eye holographic stereoscopic image in different regions of one panel, thereby providing a high quality holographic stereoscopic image. do.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a diagram showing the configuration of a digital holographic image reproducing apparatus implementing the computer-generated hologram method according to the prior art.
2 is a schematic diagram showing the structure of a digital holography stereoscopic image display device using a transmissive liquid crystal display device according to a first embodiment of the present invention.
3 is a schematic diagram showing a state in which a stereoscopic image is provided when a focal point of a stereoscopic image is set in a space between an SLM and a viewer in a holographic stereoscopic image display apparatus according to a first embodiment of the present invention;
4 is a schematic diagram illustrating a method of providing a stereoscopic image by transmitting a left eye image to a left eye and a right eye image to a right eye in a holographic stereoscopic image display device according to a first embodiment of the present invention;
5 is a plan view showing the configuration of a hologram pattern displayed on a spatial light modulation panel.
6 is a plan view showing a screen configuration of a spatial light modulation panel according to a second embodiment of the present invention;
FIG. 7 is a plan view illustrating a spatial light modulation panel according to a first modified example in the second embodiment of the present invention; FIG.
8 is a plan view of a spatial light modulation panel according to a second modified example of the second embodiment of the present invention.
9A and 9B are plan views illustrating a spatial light modulation panel according to a third modified example in the second embodiment of the present invention.
10 is a side view illustrating a structure of a holographic stereoscopic image display device according to a second embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings. Like numbers refer to like elements throughout. In the following description, when it is determined that the detailed description of the known technology or configuration related to the present invention may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

First, a thin film flat panel holographic stereoscopic image display apparatus using a transmissive liquid crystal display device as a spatial light modulator according to a first embodiment of the present invention will be described with reference to FIG. 2. 2 is a schematic diagram illustrating a structure of a digital holography stereoscopic image display device using a transmissive liquid crystal display device according to a first embodiment of the present invention.

The holographic stereoscopic image display device according to the first embodiment of the present invention configures the SLM 200 as a transmissive liquid crystal display panel. That is, the SLM 200 is formed of a transmissive liquid crystal display panel in which the upper plate SU formed of a transparent glass substrate and the lower plate SD face each other, and are coupled through the liquid crystal layer LC therebetween. The SLM 200 receives interference fringe pattern data from a computer or a video processing apparatus (not shown) and displays the interference fringe. Each of the upper plate SU and the lower plate SD may include a thin film transistor and a color filter constituting the liquid crystal display panel.

The backlight unit BLU including the light source 300 and the optical fiber OF is disposed on the bottom surface of the SLM 200. The light source 300 may be configured as a light source 300 using laser diodes including red laser diodes (R), green laser diodes (G), and blue laser diodes (B) or red, green, and blue collimated LEDs. have. Meanwhile, the light source 300 may be a light source 300 that combines R, G, B, or other colors that distinguish red, green, and blue, and may be a single light source such as a white laser diode or a white collimated LED. 300). As described above, the light source 300 may be various. For convenience, the light sources 300 will be described in the case of the red, green, and blue laser diodes R, G, and B.

The optical fiber OF is used to evenly guide the reference light emitted from the light source 300 to the lower front surface of the SLM 200 substrate. For example, laser diodes R, G, and B may be disposed on one side of the backlight unit BLU. In addition, the laser light emitted from the laser diodes R, G, and B may be extended to be emitted from the lower surface of the SLM 200 using the optical fiber OF. The optical fiber OF may be disposed to correspond to the front surface of the SLM 200 which is a liquid crystal panel. In particular, a plurality of light output parts OUT are formed to remove a part of the clad surrounding the core of the optical fiber OF to emit laser light to the outside of the optical fiber OF so that the laser light is irradiated to the entire liquid crystal panel. Can be. In addition, between the SLM 200 and the optical fiber OF, an optical sheet 500 for adjusting the reference light extended by the optical fiber OF to maintain the size corresponding to the area of the SLM 200 and to run in parallel straight. It may further include.

In the first embodiment, the backlight unit BLU discloses only a schematic structure using the optical fiber OF. When the color pixels constituting the SLM 200 are arranged with the same color pixels based on one column, the optical fibers OF corresponding to each color may be arranged to correspond to one column. Alternatively, a backlight unit BLU in which a surface-emitting laser diode corresponding to each pixel is formed at a position corresponding to each color pixel can also be used. Since the essential contents of the present invention are not in the backlight unit BLU, detailed examples will be omitted.

In addition, the front surface of the SLM 200 may further include a flat lens (FL) for focusing the stereoscopic image at a suitable position in the space between the SLM 200 and the viewer. The focus of the flat plate lens FL may be set in various ways. For example, the focus may be set at an optimal position between the SLM 200 and the viewer. Alternatively, you can focus directly on the viewer's eyes. In this case, it is desirable to transmit the left eye image and the right eye image alternately to the left eye and the right eye. Since the core of the present invention is not limited to the flat lens FL, detailed description thereof will be omitted.

The eye-tracker detects the moving position of the spectator when the spectator moves, calculates the viewing angle according to the spectator's position, and deflects the stereoscopic image to the angle at which the spectator is located. (ET) may be further included. The eye tracker ET is a deflection device that deflects the focus of the stereoscopic image in the horizontal direction according to the position of the viewer. Therefore, although not shown in the drawings, it is preferable that the eye tracker ET further includes a viewer position detector for recognizing the viewer's position. Since the core of the present invention is not limited to the eye tracker ET, detailed description thereof will be omitted.

3 is a schematic diagram illustrating a state in which a stereoscopic image is provided when the focal point of the stereoscopic image is set in a space between the SLM and the viewer in the holographic stereoscopic image display according to the first embodiment of the present invention. Referring to FIG. 3, when the SLM 200 expresses the interference pattern for the holographic stereoscopic image, the reference light emitted from the backlight unit BLU passes through the interference pattern of the SLM 200, and the stereoscopic image is realized. do. The outgoing light for implementing the stereoscopic image displays the stereoscopic image on the space between the SLM 200 and the viewer by the flat lens FL. In addition, when the viewer moves to the left or right from the front position, the eye tracker (ET) detects this and adjusts the stereoscopic image to be focused in front of the viewer by deflecting the stereoscopic image to the moved viewer's position.

4 is a schematic diagram illustrating a method of providing a stereoscopic image by transmitting a left eye image to a left eye and a right eye image to a right eye in a holographic stereoscopic image display device according to a first embodiment of the present invention. The stereoscopic image implementation method of FIG. 4 is basically the same as the implementation method of FIG. 3. However, if there is a difference, in FIG. 4, there is a difference in transmitting the left eye stereoscopic image to the viewer's left eye and the right eye stereoscopic image to the viewer's right eye.

For example, the first frame displays a left eye image of a left eye holography method. At this time, the focal point of the flat lens FL is set between the left and right eyes of the viewer. The eye tracker (ET) shifts the focus toward the left eye. Since the average distance between the left and right eyes of an average person is 65mm on average, when implementing a left-eye stereoscopic image, the eye tracker ET sets the deflection angle so that the focal point moves about 32mm to the left. Meanwhile, the second frame displays the right eye image of the right eye holography method. Similarly, the focal point of the flat lens FL is set between the left and right eyes of the viewer. The eye tracker (ET) shifts the focus toward the right eye. That is, when implementing the right eye stereoscopic image, the eye tracker ET sets the deflection angle such that the focal point moves to the right by about 32 mm.

According to FIG. 3, the autostereoscopic 3D image may be implemented using the monocular method. However, the holographic stereoscopic image implemented by the binocular system according to FIG. 4 has an effect of providing the stereoscopic image more clearly and clearly than the monocular system according to FIG. However, when implementing the binocular method according to FIG. 4, since the same frame image is generated and represented by dividing the left eye image and the right eye image, high-speed driving is required. In order to smoothly perform the high speed driving, the liquid crystal layer LC constituting the SLM 200 should be a liquid crystal capable of high speed driving. This may be a problem that the cost increases because the liquid crystal material or the driving mode that can be used is extremely limited.

Accordingly, the second embodiment of the present invention describes a holographic stereoscopic image display device implemented in a binocular method that does not require high-speed driving and high-speed response. First, the spatial light modulation panel according to the second embodiment of the present invention will be described with reference to FIGS. 5 and 6. 5 is a plan view showing the configuration of a hologram pattern displayed on a spatial light modulation panel. 6 is a plan view illustrating a screen configuration of a spatial light modulation panel according to a second embodiment of the present invention.

Referring to FIG. 5, a case in which a hologram pattern is expressed in the spatial light modulation panel will be described. In FIG. 5, the portion labeled 'C' denotes an area in which main information of the hologram pattern is collected. The part except the 'C' area is a high frequency area including information that is not important. The hologram pattern is a form of an optical Fourier transform, which can express a desired image even if only a part of the pattern of the image to be implemented is taken. That is, even if only the hologram pattern of the 'C' region except for the region containing the high frequency information, there is no big problem in reproducing the entire image.

Therefore, even if only the 'A' area or the 'B' area is taken, the image to be expressed can be reproduced. For example, in the case where the 'A' area is taken, there is no problem in reconstructing the main image even if the top and bottom information disappears to some extent. In addition, when the 'B' area is taken, even if the left and right information disappears to some extent, there is no problem in reconstructing the main image. Therefore, the screen may be configured by selecting only a part of the hologram patterns according to which information is more importantly handled in the holographic imaging system to be implemented.

According to a second embodiment of the present invention, a stereoscopic image display apparatus for dividing a left eye image and a right eye image and simultaneously displaying them on one spatial light modulation panel is provided. Therefore, in order to prevent cross talk between the left eye image and the right eye image, the 'B' area is taken to remove the left / right information and treat the up / down information more importantly.

Referring to FIG. 6, the display area of the spatial light modulation panel 200 is divided into two. The left eye hologram pattern LH is displayed in the left area LA, and the right eye hologram pattern RH is displayed in the right area RA. At this time, the left eye hologram pattern LH is taken by cutting the length of the main information gathered from the entire left eye hologram pattern vertically. In particular, since the spatial light modulation panel 200 is divided into two equally, the left high frequency region 1/4 and the right high frequency region 1/4 are removed from the entire left eye hologram pattern, so as to occupy half of the total area. Only the main area is taken and displayed in the left area LA.

Similarly, the right eye hologram pattern (RH) is obtained by vertically cutting a portion of the entire right eye hologram pattern where main information is collected. In particular, since the spatial light modulation panel 200 is divided into two equally, the left high frequency region 1/4 and the right high frequency region 1/4 are removed from the hologram pattern for the right eye so as to occupy half of the entire area. Only the main area is taken and displayed in the right area RA. That is, the spatial light modulation panel according to the second embodiment of the present invention is characterized by simultaneously dividing a panel region into two parts to simultaneously display a left eye hologram pattern and a right eye hologram pattern.

7, 8, and 9A and 9B, various modified examples of the spatial light modulation panel will be described in more detail by simultaneously displaying a left eye image and a right eye image by spatial division according to the second embodiment of the present invention. . 7 is a plan view illustrating a spatial light modulation panel according to a first modified example in the second embodiment of the present invention.

Before finally displaying the left eye image and the right eye image simultaneously on the spatial light modulation panel 200, a method of dividing the left eye image and the right eye image on the spatial light modulation panel 200 is set. In the first modified example, the left eye image (LH) and the right eye image (RH) are alternately represented by dividing one row by eight columns.

The left eye hologram pattern LH and the right eye hologram pattern RH are stored on the memory, respectively. The hologram pattern LH for the left eye is divided into the same 1 row x 8 columns, and 4 rows of the main patterns are selected among them. In this example, it is assumed that up to the second row LH2 to the fourth row LH4 are selected. The right eye hologram pattern (RH) is also divided into 1 row x 8 columns, of which 4 rows with main patterns are selected. In this case, it is assumed that up to the fourth row RH4 to the seventh row RH7 are selected.

The above-described left eye hologram pattern four rows LH2 to LH5 and the right eye hologram pattern four rows RH4 to RH7 alternately arranged are displayed on the spatial light modulation panel 200. In a second modified example of the second embodiment of the present invention, a stereoscopic image is realized by alternately arranging a left eye hologram pattern and a right eye hologram pattern on a spatial light modulation panel divided into eight columns in a vertical direction. .

8 is a plan view illustrating a spatial light modulation panel according to a second modified example of the second embodiment of the present invention. Before finally displaying the left eye image and the right eye image simultaneously on the spatial light modulation panel 200, a method of dividing the left eye image and the right eye image on the spatial light modulation panel 200 is set. In the second modified example, the left eye image (LH) and the right eye image (RH) are alternately represented by dividing two rows by two columns.

The left eye hologram pattern LH and the right eye hologram pattern RH are stored on the memory, respectively. The hologram pattern LH for the left eye is divided into the same two rows by two columns, and among these, two zones LH1 and LH2 having main patterns are selected. The right eye hologram pattern (RH) is also divided into two rows by two columns, from which two zones (RH1, RH2) with major patterns are selected.

The left eye hologram pattern 2 zones LH1 and LH2 and the right eye hologram pattern 2 zones RH1 and RH2 where the main information are collected are alternately arranged and displayed on the spatial light modulation panel 200. In the third modified example of the second embodiment of the present invention, a stereoscopic image is realized by alternately arranging a left eye hologram pattern and a right eye hologram pattern on a spatial light modulation panel divided by 2 × 2.

In addition, although not illustrated, for example in a separate drawing, it can be expanded to n × n. For example, the left eye hologram pattern and the right eye hologram pattern are respectively divided by n × n, and main areas are selected from the left eye hologram patterns and the right eye hologram patterns. In particular, the left eye and right eye hologram patterns may be selected by (n × n) / 2, respectively, and rearranged so as not to be adjacent to each other to be expressed on a spatial light modulation panel of one frame.

In another case, the number of left eye hologram patterns to be selected and the number of right eye hologram patterns to be selected are not necessarily the same. For example, when the left eye hologram pattern has more important information, and when the hologram pattern is divided by the same size, a larger number of left eye hologram patterns may be selected and rearranged.

In another case, when repositioning the left eye hologram pattern and the right eye hologram pattern, it is most preferable to arrange the same hologram pattern so as not to be adjacent to each other in the top, bottom, left, and right directions. However, in some cases, the same hologram pattern may be disposed adjacent to each other. For example, when the left eye hologram pattern has more main information, the main patterns may be arranged together.

So far, only the case where the left eye area and the right eye area are divided into the same size has been described. However, the sizes of the left eye area and the right eye area are not necessarily the same. In some cases, the size of the main region in the left eye hologram pattern may be larger or smaller than the size of the main region in the right eye hologram pattern. In this case, the size ratio for each region may be set differently.

9A and 9B are plan views illustrating a spatial light modulation panel according to a third modified example in the second embodiment of the present invention. In FIG. 9A, a 3D image is realized by alternately arranging a left eye hologram pattern and a right eye hologram pattern on a spatial light modulation panel divided by 2 × 2. In FIG. 9A, a spatial division scheme suitable for the case where the main region is larger in the left eye hologram pattern is illustrated.

In FIG. 9B, a left eye hologram pattern and a right eye hologram pattern are alternately arranged on a spatial light modulation panel divided by 2 × 4 to realize a stereoscopic image. In FIG. 9B, the spatial division scheme is particularly suitable when the main region is divided into several parts and distributed.

In the second embodiment of the present invention, one frame of the spatial light modulation panel is divided into a left eye area and a right eye area. In particular, in order to prevent crosstalk of the left and right eyes, it is based on equal distribution for the left and right eyes. Therefore, the number of columns is characterized by dividing by 2m (m is a natural number). In addition, it can be further divided into rows, and since the rows are arranged up and down and do not affect the crosstalk, the rows are divided into n (n is a natural number). That is, the spatial light modulation panel is characterized by dividing one frame into n × 2m (n and m are natural numbers) and rearranging the left eye hologram pattern and the right eye hologram pattern so that they are not adjacent to each other from above and below and from side to side.

As described above, the overall configuration of the stereoscopic image display device including the spatial light modulating panel expressing the left eye hologram pattern and the right eye hologram pattern according to the second embodiment of the present invention will be described. 10 is a side view illustrating a structure of a holographic stereoscopic image display device according to a second embodiment of the present invention.

The thin film flat panel holographic stereoscopic image display according to the second embodiment of the present invention has a structure in which a backlight unit BLU, a spatial light modulation panel 200, and an eye tracker ET are sequentially arranged. The backlight unit BLU provides a backlight having high collimation purity and excellent coherence to the spatial light modulation panel 200.

The spatial light modulation panel 200 is designed to divide one frame into n × 2m (n, m is a natural number) and rearrange and display the left eye hologram pattern and the right eye hologram pattern so that they are not adjacent to each other from above and below and from side to side. Accordingly, the spatial light modulation panel 200 may be connected to a data processor or computer 100 capable of storing, analyzing, dividing, and selecting the left eye hologram pattern LH and the right eye hologram pattern RH.

An eye tracker ET is disposed in front of the spatial light modulation panel 200 to selectively transmit the left eye hologram pattern LH to the viewer's left eye and the right eye hologram pattern LH to the viewer's right eye. In the second embodiment of the present invention, the left eye area and the right eye area are not fixed but may be arbitrarily changed. Accordingly, the eye tracker ET also selects the left eye area and the right eye area in synchronization with the division of the spatial light modulation panel 200, and transmits the images to the left eye and the right eye, respectively. In order to effectively do this, the eye tracker ET is preferably composed of a vertical grating panel VG and a horizontal grating panel HG.

The vertical grating panel VG is a device which deflects the advancing direction of light passing upward or downward in the vertical direction. In particular, it is preferable that the divided regions of the spatial light modulation panel 200 can be set to have different vertical deflection directions.

The horizontal grating panel HG is a device that deflects the traveling direction of light passing through the horizontal direction to the left or right direction. In particular, it is preferable that the divided regions of the spatial light modulation panel 200 can be set to have different horizontal deflection directions.

In the second embodiment of the present invention, since the deflection control by the eye tracker ET is different for each divided area of the spatial light modulation panel 200, as in the first embodiment, the flat lens FL focuses the stereoscopic image. Need not be provided. The eye tracker ET according to the second embodiment includes a vertical grating panel VG and a horizontal grating panel HG, and the image passing through the left eye area is the left eye of the viewer, and the image passing through the right eye area of the viewer is displayed. This is because the right eye can be deflected and focused respectively.

In the holographic stereoscopic image display device according to the present invention, the left eye image and the right eye image are not divided in time, but are spatially divided on the same panel during the same time period. Accordingly, there is also an advantage that a stereoscopic image can be realized by lowering a driving frequency compared to a time division method.

Those skilled in the art will appreciate that various changes and modifications can be made without departing from the spirit of the present invention. 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.

10, 100: computer 20, 200: spatial light modulator (panel)
30, 300: laser light source 40: expander
50: lens 80: output image
90: reference light 500: optical sheet
SU: top plate SD: bottom plate
LC: liquid crystal layer R: red laser diode
G: green laser diode B: blue laser diode
OF: fiber optic BLU: backlight unit
OUT: light exit part IN: light exit part
500: optical film
FL: Flat Lens ET: Eye Tracker
VG: Vertical Grating Panel HG: Horizontal Grating Panel
LH: Hologram pattern for left eye RH: Hologram pattern for right eye
LA: left eye area RA: right eye area

Claims (6)

Backlight unit;
A data processing device for outputting pattern data;
A spatial light modulation panel representing pattern data output from the data processing apparatus; And
Including an eye tracker,
The data processing apparatus stores a left eye hologram pattern and a right eye hologram pattern, respectively, divides the left eye hologram pattern and the right eye hologram pattern into nХ2m (n, m is a natural number) region, and divides the left eye. Selecting partial regions from the hologram pattern and the divided right eye hologram pattern, and alternately disposing selected regions of the left eye hologram pattern and selected regions of the right eye hologram pattern in the spatial light modulation panel; Multi-screen holographic stereoscopic image display device.
The method of claim 1,
The eye tracker,
A multi-screen holographic stereoscopic image display comprising a vertical grating panel and a horizontal grating panel.
delete The method of claim 1,
And the selected regions of the left eye hologram pattern are rearranged so as not to be adjacent to each other in the top, bottom, left, and right directions.
The method of claim 1,
And the selected regions of the right eye hologram pattern are rearranged so as not to be adjacent to each other at the top, bottom, left, and right sides of the hologram pattern.
The method of claim 1,
The backlight unit is a multi-screen holographic stereoscopic image display, characterized in that composed of a light source and a fiber of a laser diode or collimated LED.

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