KR20120082765A - 3d image realization system and glasses for the same - Google Patents

Abstract

PURPOSE: A three-dimensional image realization system and glasses for the same are provided to switch different wavelength areas of an image. CONSTITUTION: Glasses(300) include a left eye lens and a right eye lens(302). In the first frame, the left eye lens transmits a left eye image of a first wavelength area and the left eye lens transmits a right eye image of a second wavelength area. In the second frame, the left eye lens transmits the left eye image of the second wavelength area and the right eye lens transmits the right eye image of the first wave length area.

Description

3D image realization system and glasses for the same}

The present invention relates to an image display device, and more particularly, to a stereoscopic image implementing system and glasses for the same that can improve flicker.

In addition to binocular disparity caused by the distance between the two eyes, there are psychological and memory factors that cause humans to feel depth and three-dimensional feeling. Therefore, how much three-dimensional image information can provide the viewer with three-dimensional image display technology? Based on the above, it is generally divided into a volumetric expression type (volumetric type), a three-dimensional expression type (holographic type), a stereoscopic expression type (stereoscopic type).

The volume expression method is a way to feel the perspective of the depth direction due to psychological factors and inhalation effects.It is a three-dimensional computer graphic that displays perspective, superposition, shading, contrast, and movement by calculation, or the viewing angle to the observer. It is applied to so-called IMAX movies that provide this wide screen and cause optical illusions that are sucked into the space.

The three-dimensional representation method is the most complete stereoscopic image display technology, and may be represented by laser light reproduction holography or white light reproduction holography.

In addition, the stereoscopic expression method is to sense a three-dimensional feeling using physiological factors of both eyes, and in particular, when a related image of a plane including parallax information is provided in left and right, which is about 65 mm apart, the display surface in the process of fusing them It uses the ability to create spatial information before and after the stereoscopic sense, that is, stereography.

This stereoscopic expression method is called a multi-eye display method, and according to the position of the actual three-dimensional display, the viewer wears special glasses or a parallax barrier, lenticular or integral on the display surface side. It can be divided into a glasses-free method using a lens array of the back.

Of these, the glasses have a wider viewing angle and less dizziness when viewed, and can be produced at a relatively low cost, especially at a lower cost than holograms, and wear glasses when viewing 3D stereoscopic images. In addition, since the user does not have to wear glasses when viewing the 2D plane image, there is an advantage that one image display device can be used for displaying a 2D plane image and a 3D stereoscopic image.

The glasses method may be divided into an anaglyph method, a shutter glasses method, and a polarization split method.

The anagrip method is an early spectral division method that separates left and right images through color division of light using a color filter. That is, the filters of the red and the blue having complementary colors use glasses corresponding to the left eye and the right eye, or the right eye and the left eye, respectively, and each filter exhibits a three-dimensional effect by passing only the complementary color of the corresponding color. However, in the anaglyph method, a stereoscopic image is a single color, and an unstable feeling is generated in a screen having a large color difference or a high contrast. In addition, there is a disadvantage that causes fatigue due to the difference in color compliance when viewing for a long time.

In the polarization splitting method, a pixel of one screen is divided into two columns, rows, or pixels to display left and right eye images in different polarization directions, and the left and right glasses of the polarizing glasses have different polarization directions. It is a method of representing a three-dimensional effect by allowing the image to be recognized separately from the left and right eyes. However, the polarization splitting method divides rows, columns, or pixels into two in order to display two images at the same time on one screen, thereby reducing the resolution in half. In addition, in the polarization splitting method, a patterned polarizing splitting optical medium, for example, a patterned retarder, a micro polarizer, or the like, capable of splitting polarized light, may be mounted on the front of the display panel.

On the other hand, in the shutter glasses method, the left and right eye images are alternately displayed on one screen, and the left and right eye shutters of the shutter glasses are sequentially matched with the time difference between the left and right eye images so that each image is left and right eyes. It is a method of representing a three-dimensional effect by being recognized separately. In the shutter glasses method, only a left or right eye image is displayed on one screen, and thus a high resolution screen can be displayed without reducing the resolution.

By the way, the shutter glasses method needs to increase the number of times per unit time in order to reduce fatigue and increase stereoscopic feeling. When this method is applied to a liquid crystal display device, a slow response speed and a scan method of liquid crystal are applied. Flicker may occur due to the address addressing timing of the screen not fully matching the time-crossing timing.

A shutter glasses type 3D stereoscopic image display device will be described with reference to the drawings.

FIG. 1 is a view schematically illustrating a driving of a 3D stereoscopic image implementing system of a conventional shutter glasses type. Here, an example in which a liquid crystal display panel is used as the display panel of the 3D stereoscopic image implementing system will be described.

As shown in FIG. 1, in the shutter glasses-type 3D stereoscopic image realization system, the left eye image is displayed in the first frame F1 and the right eye image is displayed in the second frame F2, and the left eye image is displayed for each frame. The right eye image is displayed alternately. At this time, the shutter glasses, the left shutter lens is opened and the right shutter lens is closed in the first frame (F1), the right shutter lens is opened and the left shutter lens is closed in the second frame (F2).

More specifically, from the first time t0 to the second time t11 of the first frame F1, the left eye image is sequentially scanned from the top of the screen to the bottom of the screen, and the second time t11 is performed. Until the third time t12, the left eye image is displayed on the full screen.

Next, from the third time t12 at which the second frame SF2 starts to the fourth time t21, the right eye image is sequentially scanned from the top of the screen to the bottom of the screen, and the fourth time t21. Until the fifth time t22, the right eye image is displayed on the full screen.

In this case, the first time t0 to the second time t11 of the first frame F1, which is a section where the images overlap, that is, a section in which the left eye image and the right eye image coexist on the screen, and the second frame F2. The backlight is turned off from the third time t12 to the fourth time t22 of), and the image output during this period becomes black. On the other hand, from the second time t11 to the third time t12 of the first frame F1 displaying only the left eye image on the screen, and the fourth of the second frame F2 displaying only the right eye image on the screen. The backlight is turned on from the time t21 to the fifth time t22, and the left eye image and the right eye image are output during this period.

As described above, the stereoscopic image can be displayed by alternately outputting the left and right eye images while controlling the opening and closing of the left and right eye shutter lenses for each frame.

However, as mentioned above, the shutter glasses method has a disadvantage in that flicker occurs because the timing between the display panel and the shutter glasses does not coincide completely.

The degree of perception of this flicker varies with frequency.

FIG. 2 is a graph illustrating threshold modulation ratio and amplification for frequency by retinal illuminance. FIG. Here, the unit of the retinal illuminance is expressed as Td (troland), and represents the results when 0.06 Td, 0.65 Td, 7.1 Td, 77 Td, 850 Td, and 9300 Td, respectively.

It can be seen from FIG. 2 that light having a frequency of 60 Hz to 75 Hz or more is not felt by flicker due to human visual perception characteristics.

However, in general, the shutter glasses operate at a frequency of approximately 60 Hz, which may periodically feel light of strong illumination corresponding to the frequency range felt by the user, and thus the user may strongly recognize the flicker.

It is an object of the present invention to provide a stereoscopic image implementation system and glasses for the same that can improve flicker.

In order to achieve the above object, the present invention outputs a left eye image of the first wavelength region and a right eye image of the second wavelength region in a first frame, and a right eye image of the first wavelength region and the first eye in a second frame. A display device for outputting a left-eye image of a two-wavelength region, and glasses including a left-eye lens and a right-eye lens for selectively transmitting light of the first wavelength region and the second wavelength region; The left eye lens transmits the left eye image of the first wavelength region, the right eye lens transmits the right eye image of the second wavelength region, and the left eye lens transmits the left eye image of the second wavelength region in the second frame. The right eye lens provides a stereoscopic image implementing system for transmitting a right eye image of the first wavelength region.

Each of the left eye lens and the right eye lens includes first and second electrodes, a first cholesteric liquid crystal layer, third and fourth electrodes, and third and fourth electrodes between the first and second electrodes. And a second cholesteric liquid crystal layer therebetween, wherein the first cholesteric liquid crystal layer and the second cholesteric liquid crystal layer have different pitches.

In the first frame, the left eye lens is applied voltage to the first and second electrodes, the voltage is not applied to the third and fourth electrodes, and the right eye lens is applied to the first and second electrodes. No voltage is applied to the third and fourth electrodes while no voltage is applied to the first and second electrodes in the second frame, and the third and fourth electrodes are not applied. A voltage is applied to the right eye lens, and a voltage is applied to the first and second electrodes, and no voltage is applied to the third and fourth electrodes.

The first cholesteric liquid crystal layer has a pitch corresponding to the red wavelength, and the second cholesteric liquid crystal layer has a pitch corresponding to the cyan wavelength.

Each of the left eye lens and the right eye lens further includes a third cholesteric liquid crystal layer between the fifth and sixth electrodes and the fifth and sixth electrodes, and the third cholesteric liquid crystal layer is the first cholesteric liquid crystal layer. And a pitch different from that of the second cholesteric liquid crystal layer.

The first cholesteric liquid crystal layer has a pitch corresponding to the red wavelength, the second cholesteric liquid crystal layer has a pitch corresponding to the green wavelength, and the third cholesteric liquid crystal layer corresponds to the blue wavelength. Have a pitch.

The left and right eye lenses are switched at a frequency of 120 Hz.

Meanwhile, the present invention includes a left eye lens and a right eye lens that respectively transmit different wavelength regions of an image output from a display device, wherein each of the left eye lens and the right eye lens includes: first and second electrodes, and A first cholesteric liquid crystal layer between the first and second electrodes, a third and fourth electrode, and a second cholesteric liquid crystal layer between the third and fourth electrodes, wherein the first cholesteric liquid crystal layer The layer and the second cholesteric liquid crystal layer provide glasses for a stereoscopic image forming system having different pitches.

In the stereoscopic image realization system according to the present invention, the left eye lens and the right eye lens of the glasses transmit different wavelength regions of the image, respectively, and switch the wavelength regions transmitted through each frame, thereby making it possible to achieve full color without generating binocular color difference. Stereoscopic images can be implemented. In addition, since the image is input at a frequency of 120 Hz or more, the problem of flicker can be solved.

FIG. 1 is a view schematically illustrating a driving of a 3D stereoscopic image implementing system of a conventional shutter glasses type.
2 is a graph illustrating limit modulation ratio and amplification for each retinal illuminance.
3 is a view schematically showing a stereoscopic image implementing system according to an embodiment of the present invention.
4 is a perspective view of a 3D stereoscopic image display device according to an exemplary embodiment of the present invention.
5 is a schematic cross-sectional view of a lens structure of glasses for a stereoscopic image implementing system according to an exemplary embodiment of the present invention.
6A and 6B illustrate an output of a lens according to an application of an electric field in glasses for a stereoscopic image forming system according to an exemplary embodiment of the present invention.
FIG. 7 is a graph illustrating bandwidths of selective reflection wavelengths and selective reflection wavelengths of the first and second cholesteric liquid crystal layers according to property values in glasses for a stereoscopic image display system according to an embodiment of the present invention.
8A to 8C schematically illustrate a stereoscopic image implementation process according to the present invention.
9A to 9C, and FIGS. 10A to 10C and 11 are diagrams illustrating an image implementation process in a first frame according to the present invention.
12A, 12B, 13A, 13C, and 14 are diagrams illustrating an image implementation process in a second frame according to the present invention.
15 is a schematic cross-sectional view of a lens structure of glasses for a stereoscopic image forming system according to another embodiment of the present invention.
16 is a graph illustrating selective reflection wavelengths and bandwidths of selective reflection wavelengths of the first to third cholesteric liquid crystal layers according to physical property values in glasses for a stereoscopic image forming system according to another embodiment of the present invention. .

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

3 is a view schematically showing a stereoscopic image implementing system according to an embodiment of the present invention, Figure 4 is a perspective view of a three-dimensional stereoscopic image display device according to an embodiment of the present invention.

First, as shown in FIG. 3, the 3D image implementing system 100 according to an exemplary embodiment of the present invention includes a display device 200 and a shutter glasses 300. An infrared emitter 250 is connected to the display device 200, and an infrared receiver (not shown) is mounted to the shutter glasses 300, and the shutter glasses 300 may be mounted according to a signal from the infrared generator 250. 300 is operated.

As shown in FIG. 4, the display device 200 outputs a left eye image and a right eye image of a separated wavelength range in units of frames. For example, a liquid crystal display, a plasma display, an organic light emitting display device, The same flat panel display device can be used. In the embodiment of the present invention, for convenience of description, the liquid crystal display device is used as the display device 200 as an example.

The LCD 200 may include two substrates 210 and 220 facing each other, and a liquid crystal layer (not shown) interposed between the two substrates 210 and 220. Here, the two substrates 210 and 220 may correspond to an array substrate and a color filter substrate, respectively.

The liquid crystal display 200 may further include first and second polarizing plates 230 and 240 attached to outer surfaces of the array substrate and the color filter substrates 210 and 220, respectively.

In addition, although not illustrated, the liquid crystal display 200 may further include a backlight unit positioned on the rear surface of the first polarizing plate 230. The backlight unit includes a light source for supplying light to the liquid crystal display 200.

Here, a direct type backlight unit in which the light source is located below the rear surface of the array substrate 210 may be used, or an edge type backlight unit in which the light source may be positioned on the side of the liquid crystal display 200 may be used. Can be.

In the array substrate 210, gate wirings 216 and data wirings 218 are formed to define a plurality of pixel regions P arranged in a matrix to cross each other.

In the pixel region P, a thin film transistor Tr connected to the gate line 216 and the data line 218 is formed as a switching element. The thin film transistor Tr may include a gate electrode connected to the gate wiring 216, a semiconductor layer, a source electrode connected to the data wiring 218, and a drain electrode spaced apart from the source electrode.

The pixel region P may include a pixel electrode 219 connected to the drain electrode of the thin film transistor Tr.

The black matrix 221 is formed on the second substrate 220 to correspond to the boundary of the pixel region P. As shown in FIG. The black matrix 221 may have an opening corresponding to the pixel area P. FIG.

The color filter layer 222 is formed in the second substrate 220 to correspond to the opening of the black matrix 221. The color filter layer 222 may include a red (R) color filter pattern, a green (G) color filter pattern, and a blue (B) color filter pattern. Each of the red (R) color filter pattern, the green (G) color filter pattern, and the blue (B) color filter pattern may be formed in the corresponding pixel region (P).

In addition, a common electrode (not shown) covering the color filter layer 222 may be formed on the entire surface of the second substrate 220.

In the liquid crystal display 200 as described above, the gate wiring 216 is sequentially scanned to apply a gate voltage. When the gate voltage is applied, the thin film transistor Tr connected to the scanned gate line 216 is turned on. In synchronization with the turn-on of the thin film transistor Tr, a data voltage is output to the data line 218 and applied to the corresponding pixel electrode 219. On the other hand, a common voltage is applied to the common electrode. As described above, due to the difference between the data voltage applied to the pixel electrode 219 and the common voltage applied to the common electrode, an electric field is generated in the liquid crystal layer to change the arrangement of liquid crystal molecules. Therefore, the desired image can be displayed by driving the liquid crystal layer.

The liquid crystal display 200 according to the exemplary embodiment of the present invention outputs a left eye image and a right eye image of a wavelength region separated by frame, and the wavelength region of the left and right eye images of one frame is inverted in the next frame. . That is, the left eye image of the first wavelength region and the right eye image of the second wavelength region are output in the first frame, and the right eye image of the first wavelength region and the left eye image of the second wavelength region are output in the second frame. The image is output without distinguishing between left and right eye images in frame units.

In the above description, the case where the liquid crystal layer is driven by an electric field generated vertically between the two substrates 210 and 220 has been described as an example. As the liquid crystal display device 200 driving the liquid crystal layer by the electric field generated between the substrates 210 and 220 as described above, for example, a twisted nematic mode liquid crystal display device and a VA type (vertical alignment mode) liquid crystal display. Devices and the like can be used.

Meanwhile, in the exemplary embodiment of the present invention, the liquid crystal display 200 driving the liquid crystal layer by an electric field parallel to the substrates 210 and 220 may be used. That is, as the liquid crystal display 200 for driving the liquid crystal layer by a horizontal electric field, for example, an in-plane switching mode (IPS mode) liquid crystal display may be used. In such a transverse electric field type liquid crystal display, the common electrode and the pixel electrode are formed on the same substrate, that is, the array substrate 210 to form a transverse electric field. The common electrode and the pixel electrode are alternately arranged in the pixel region P. Can be.

Various types of liquid crystal display devices other than those described above may be used.

On the other hand, the glasses 300 for a stereoscopic image implementation system according to the present invention, the left eye lens 302 and the right eye lens 304, and the left eye lens 302 and the eyeglass frame 306 to which the right eye lens 304 is mounted. Include.

Here, the left eye lens 302 and the right eye lens 304 may transmit light in different wavelength regions, respectively, and switch the light to be transmitted to each other. For example, when the left eye lens 302 transmits light having a red wavelength, the right eye lens 304 transmits light having a cyan wavelength, and the left eye lens 302 transmits light having a cyan wavelength. In this case, the right eye lens 304 transmits light having a red wavelength.

Therefore, when the left and right eye images of the wavelength region separated by the frame unit are displayed on the liquid crystal display 200, the first wavelength region, for example, the left eye image of the cyan wavelength region through the left eye lens 302 in one frame. And a right eye image of a second wavelength region, for example, a red wavelength region, through the right eye lens 304. Subsequently, the second frame transmits the left eye image of the second wavelength region, that is, the red wavelength region, through the left eye lens 302, and transmits the right eye image of the first wavelength region, that is, the cyan wavelength region, through the right eye lens 304. Let's do it. In this way, the left and right eye images of the separated wavelength region are inverted and displayed for each frame, and the left and right eye images of the wavelength region separated in each frame are transmitted through the left and right eye lenses, respectively, By switching the wavelength region transmitted through the right eye lens, a three-dimensional effect can be felt.

5 is a cross-sectional view schematically illustrating a lens structure of glasses for a stereoscopic image forming system according to an embodiment of the present invention, wherein the left eye lens and the right eye lens may have the same structure.

As shown in FIG. 5, the lens of the glasses according to the embodiment of the present invention includes first and second substrates 310 and 320 facing each other with the first cholesteric liquid crystal layer 330 interposed therebetween. The second substrate 320 includes third and fourth substrates 340 and 350 facing each other with the second cholesteric liquid crystal layer 360 interposed therebetween.

The first electrode 312 and the first alignment layer 314 are sequentially formed between the first substrate 310 and the first cholesteric liquid crystal layer 330, and the second substrate 320 and the first cholesteric are sequentially formed. The second electrode 322 and the second alignment layer 324 are sequentially formed between the liquid crystal layers 330. In addition, a third electrode 342 and a third alignment layer 344 are sequentially formed between the third substrate 320 and the second cholesteric liquid crystal layer 360, and the fourth substrate 350 and the second collet are sequentially formed. The fourth electrode 352 and the fourth alignment layer 354 are sequentially formed between the steric liquid crystal layers 360.

The first to fourth substrates 310, 320, 340, and 350 may be made of glass or a plastic substrate as a transparent material. Herein, any one of the second and third substrates 320 and 340 may be omitted. In this case, the second electrode 322 and the second alignment layer 324 may be one of the second and third substrates 320 and 340. The third electrode 342 and the third alignment layer 344 are formed on the other first surface, that is, the lower surface, and the second surface of the second and third substrates 320 and 340, that is, the upper surface. Is formed.

The first to fourth electrodes 312, 322, 342, and 352 are made of a transparent conductive material. For example, the first to fourth electrodes 312, 322, 342, and 352 may be formed of indium tin oxide or indium zinc oxide. Can be.

The first and second cholesteric liquid crystal layers 330 and 360 may be applied to the first and second electrodes 312 and 322 and the third and fourth electrodes 342 and 352 when an electric field is not applied. When no voltage is applied, it has a specific chiral pitch, reflects light having the same wavelength as the chiral pitch and transmits the rest. On the other hand, when an electric field is applied, that is, when voltage is applied to the first and second electrodes 312 and 322 and the third and fourth electrodes 342 and 352, the first and second cholesteric liquid crystal layers 330 and 360 are arranged along the direction of the electric field so that the twist of the liquid crystal disappears, thereby transmitting light of all wavelengths. Here, the first and second cholesteric liquid crystal layers 330 and 360 have different chiral pitches. For example, the first cholesteric liquid crystal layer 330 has a chiral pitch corresponding to a red wavelength, and the second cholesteric liquid crystal layer 360 has a chiral pitch corresponding to a cyan wavelength. Has

6A and 6B illustrate an output of a lens according to an application of an electric field in glasses for a stereoscopic image forming system according to an exemplary embodiment of the present invention.

First, as shown in FIG. 6A, a voltage is applied to the first electrode 312 and the second electrode 322, and no voltage is applied to the third electrode 342 and the fourth electrode 352. At this time, since the first cholesteric liquid crystal layer 330 loses its twisting characteristic, it does not reflect light having a red wavelength, and all of the light incident through the first substrate 310 is the first cholesteric liquid crystal layer ( 330). Subsequently, the light incident through the second and third substrates 320 and 340 passes through the second cholesteric liquid crystal layer 360. At this time, light of the cyan wavelength C is reflected and thus light of the red wavelength Only (R) is output through the fourth substrate 350.

On the other hand, as shown in FIG. 6B, the voltage is applied to the third electrode 342 and the fourth electrode 352 without applying a voltage to the first electrode 312 and the second electrode 322. At this time, since the second cholesteric liquid crystal layer 360 loses its twisting characteristic, it does not reflect light C having a blue-green wavelength. Therefore, all of the light incident through the first substrate 310 passes through the first cholesteric liquid crystal layer 330, where the light of red wavelength (R) is reflected and only the light (C) of the remaining cyan-based wavelengths. To pass. Subsequently, light C having a cyan-based wavelength incident through the second and third substrates 320 and 340 passes through the second cholesteric liquid crystal layer 360 and is output through the fourth substrate 350.

As described above, the left eye lens and the right eye lens of the glasses according to the embodiment of the present invention operate through the processes of FIGS. 6A and 6B, and the operations of the left eye lens and the right eye lens are reversed. That is, when the left eye lens operates to output light R having a red wavelength as shown in FIG. 6A, the right eye lens operates to output light C having a cyan wavelength as shown in FIG. 6B. On the other hand, when the left eye lens is operated to output light C of a cyan wavelength as shown in FIG. 6B, the right eye lens is operated to output light R of a red wavelength as shown in FIG. 6A.

Therefore, in the embodiment of the present invention, the left eye image and the right eye image of the different wavelength regions which are simultaneously input are respectively provided through the first and second cholesteric liquid crystal layers (330 and 360 of FIG. 5) of the left eye lens and the right eye lens. Permeate. In this case, the left and right eye lenses of the glasses are switched to have a frequency of 120 Hz or more, and the left and right eye images of 120 Hz are input every frame. Accordingly, it is possible to provide a stereoscopic image display device having improved flicker.

The selective reflection wavelength λ and the bandwidth Δλ of the first and second cholesteric liquid crystal layers (330 and 360 of FIG. 5) used in the left eye lens and the right eye lens are represented by the following equation (1). ) And (2).

Is the angle of incidence of light incident on the cholesteric liquid crystal layer, p is the pitch of the cholesteric liquid crystal layer, and λ ₀ is the central wavelength of the bandwidth of the selective reflection wavelength. In addition, the cholesteric liquid crystal layer has a refractive index n _{o in} a direction in which the polarization direction of light is perpendicular to the optical axis and a refractive index n _e in the horizontal direction, where n is a cholester in Equations (1) and (2). The average refractive index of the liquid crystal layer is represented by (n _e + n _o ) / 2, and Δn is represented by n _e -n _o as the birefringence of the cholesteric liquid crystal layer.

When the physical property values of the first and second cholesteric liquid crystal layers (330 and 360 of FIG. 5) required for Equations (1) and (2) are obtained by simulation, they may be represented as shown in Table 1 below.

n Δn p (nm) λ ₀ Δλ First cholesteric liquid crystal layer 1.55 0.2 420 630 81 Second cholesteric liquid crystal layer 1.55 0.32 335 503 104

FIG. 7 graphically shows the bandwidths of the selective reflection wavelength and the selective reflection wavelength of the first and second cholesteric liquid crystal layers (330 and 360 of FIG. 5) according to the property values.

A process of implementing a stereoscopic image using glasses according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

8A to 8C schematically illustrate a stereoscopic image implementation process according to the present invention. FIG. 8A illustrates driving and input images of glasses in a first frame, and FIG. 8B illustrates driving and input of glasses in a second frame. FIG. 8C illustrates a stereoscopic image based on an input image in the first and second frames.

As shown in FIG. 8A, in the first frame, the display device 200 (in FIG. 4) displays the left eye image ILc of the first wavelength region and the right eye image IRr of the second wavelength region, and the left eye lens The left eye image ILc of the first wavelength region is transmitted, the right eye image IRr of the second wavelength region is reflected and blocked, and the right eye lens reflects and blocks the left eye image ILc of the first wavelength region, The right eye image IRr of the second wavelength region is transmitted. Here, for example, the first wavelength region corresponds to the cyan wavelength region, and the second wavelength region corresponds to the red wavelength region. Therefore, in the first frame, the left eye image ILc of the cyan wavelength region is incident to the left eye, and the right eye image IRr of the red wavelength region is incident to the right eye.

Next, as shown in FIG. 8B, in the second frame, the display device 200 (in FIG. 4) displays the right eye image IRc of the first wavelength region and the left eye image ILr of the second wavelength region. The lens reflects and blocks the right eye image IRc of the first wavelength region, that is, the cyan wavelength region, and transmits the left eye image ILr of the second wavelength region, that is, the red wavelength region, and the right eye lens has the first wavelength. The right eye image IRc of the region, that is, the cyan wavelength region, is transmitted, and the left eye image ILr of the second wavelength region, that is, the red wavelength region, is reflected and blocked. Therefore, in the second frame, the right eye image IRc of the blue-green wavelength region is incident on the right eye, and the left eye image ILr of the red wavelength region is incident on the left eye.

Accordingly, as shown in FIG. 8C, both the left eye image IL and the right eye image IR may display full color, and a three-dimensional effect may be felt.

For the process of implementing a stereoscopic image according to the present invention, based on the wavelength of the image, 9a to 9c, 10a to 10c, 11, 12a to 12c, 13a to 13c, and It demonstrates with reference to FIG.

9A to 9C, 10A to 10C, and 11 are views illustrating an image realization process in a first frame, and FIGS. 12A to 12C, 13A to 13C, and 14 are a second frame. A diagram illustrating an image implementation process in. 11 and 14 illustrate images input to both eyes of the user through the left and right eye lenses in the first and second frames, respectively. FIGS. 9A to 9C and 12A to 12C are the right eye lenses. 10A through 10C and 13A through 13C illustrate an image passing through the left eye lens step by step.

First, in the first frame F1, the display device 200 of FIG. 4 displays a left eye image of the first wavelength region and a right eye image of the second wavelength region. Here, the first wavelength region corresponds to the cyan region, and the second wavelength region corresponds to the red region. In this case, an electric field is applied to the first cholesteric liquid crystal layer (330 of FIG. 5) of the right eye lens and no electric field is applied to the second cholesteric liquid crystal layer (360 of FIG. 5) of the right eye lens. Accordingly, as shown in FIG. 9A, both left and right eye images from the display device 200 (200 of FIG. 4) pass through the first cholesteric liquid crystal layer (330 of FIG. 5) of the right eye lens. Subsequently, as shown in FIG. 9B, the left and right eye images passing through the first cholesteric liquid crystal layer (330 of FIG. 5) of the right eye lens as it is are the second cholesteric liquid crystal layer of the right eye lens (360 of FIG. 5). ), The left eye image of the cyan wavelength region is reflected by the second cholesteric liquid crystal layer (360 of FIG. 5), and the right eye image of the red wavelength region is transmitted. Therefore, as shown in Fig. 9C, only the right eye image in the red wavelength region is incident on the right eye.

On the other hand, in the first frame F1, the second cholesteric liquid crystal layer of the left eye lens (360 of FIG. 5) is not applied to the first cholesteric liquid crystal layer of the left eye lens (330 of FIG. 5). Apply an electric field. Accordingly, as shown in FIG. 10A, the left and right eye images from the display device 200 (200 of FIG. 4) pass through the first cholesteric liquid crystal layer (330 of FIG. 5) of the left eye lens. The right eye image of the red wavelength region is reflected by the lick liquid crystal layer (330 of FIG. 5), and the left eye image of the cyan wavelength region is transmitted. Subsequently, as shown in FIG. 10B, the left eye image of the blue-green wavelength region passing through the first cholesteric liquid crystal layer of the left eye lens (330 of FIG. 5) is a second cholesteric liquid crystal layer of the left eye lens (FIG. 5). Pass through 360). Therefore, as shown in Fig. 10C, only the left eye image of the cyan wavelength region is incident on the left eye.

Accordingly, as shown in FIG. 11, in the first frame F1, of the left eye and right eye images from the display device 200 (200 of FIG. 4), the left eye image of the blue-green wavelength region is incident on the left eye, The right eye image is incident on the right eye.

Meanwhile, in the second frame F2, the display device 200 of FIG. 4 displays the right eye image of the first wavelength, that is, the cyan wavelength region, and the left eye image of the second wavelength, that is, the red wavelength region, and the left eye lens. The right eye lens is driven opposite to the first frame F1.

More specifically, in the second frame F2, the second cholesteric liquid crystal layer (360 in FIG. 5) of the right eye lens without applying an electric field to the first cholesteric liquid crystal layer (330 in FIG. 5) of the right eye lens. Applies an electric field. Accordingly, as shown in FIG. 12A, the left and right eye images from the display device 200 (200 of FIG. 4) pass through the first cholesteric liquid crystal layer (330 of FIG. 5) of the right eye lens. The left liquid image of the red wavelength region is reflected by the lick liquid crystal layer (330 of FIG. 5), and the right eye image of the cyan wavelength region is transmitted. Next, as shown in FIG. 12B, the right eye image of the blue-green wavelength region passing through the first cholesteric liquid crystal layer of the right eye lens (330 of FIG. 5) is the second cholesteric liquid crystal layer of the right eye lens (FIG. 5). Pass through 360). Therefore, as shown in Fig. 12C, only the right eye image in the cyan wavelength region is incident on the right eye.

On the other hand, in the second frame F2, the electric field is applied to the first cholesteric liquid crystal layer (330 in FIG. 5) of the left eye lens, and the electric field is applied to the second cholesteric liquid crystal layer (360 in FIG. 5) of the left eye lens. Do not authorize. Accordingly, as shown in FIG. 13A, both the left and right eye images from the display device 200 (200 of FIG. 4) pass through the first cholesteric liquid crystal layer (330 of FIG. 5) of the left eye lens. Subsequently, as shown in FIG. 13B, the left and right eye images that have passed through the first cholesteric liquid crystal layer (330 of FIG. 5) of the left eye lens as they are are the second cholesteric liquid crystal layer of the left eye lens (360 of FIG. 5). ), The right eye image of the cyan wavelength region is reflected by the second cholesteric liquid crystal layer (360 of FIG. 5), and the left eye image of the red wavelength region is transmitted. Therefore, as shown in Fig. 13C, only the left eye image of the red wavelength region is incident on the left eye.

Accordingly, as shown in FIG. 14, in the second frame F2, among the left and right eye images from the display device 200 of FIG. 4, the right eye image of the cyan wavelength region is incident on the right eye, The left eye image is incident on the left eye.

As described above, in the present invention, the left and right eye images of the separated wavelength region are incident on the left and right eyes, respectively, and in the next frame, the left and right eyes are incident on the left and right eyes, respectively, thereby displaying a three-dimensional effect. In this case, even if the glasses are driven at 60 Hz, the left and right eye lenses are switched at a frequency of 120 Hz, so that images of the separated wavelength region of 120 Hz, for example, the cyan and red wavelength regions, are input in every frame, thereby solving the flicker problem. Can be.

In the above embodiment, the case in which the left eye lens and the right eye lens each include the first and second cholesteric liquid crystal layers has been described. However, the left eye lens and the right eye lens each have a different pitch from the first to third cholesterics. It may also include a liquid crystal layer.

15 is a schematic cross-sectional view of a lens structure of glasses for a stereoscopic image forming system according to another embodiment of the present invention.

As shown in FIG. 15, a lens of eyeglasses according to another exemplary embodiment of the present invention includes a first to fourth substrate 410, 420, 440, and 460 between the first and second substrates 410 and 420. Between the first cholesteric liquid crystal layer 430, the second cholesteric liquid crystal layer 450 between the second and third substrates 420 and 440, and the third and fourth substrates 440 and 460. The third cholesteric liquid crystal layer 470 is included.

The first electrode 412 and the first alignment layer 414 are sequentially formed between the first substrate 410 and the first cholesteric liquid crystal layer 430, and the second substrate 420 and the first cholesteric are sequentially formed. The second electrode 422 and the second alignment layer 424 are sequentially formed between the liquid crystal layers 430. In addition, a third electrode 426 and a third alignment layer 428 are sequentially formed between the second substrate 420 and the second cholesteric liquid crystal layer 450, and the third substrate 440 and the second collet. The fourth electrode 442 and the fourth alignment layer 444 are sequentially formed between the steric liquid crystal layers 450. In addition, a fifth electrode 446 and a fifth alignment layer 448 are sequentially formed between the third substrate 440 and the third cholesteric liquid crystal layer 470, and the fourth substrate 460 and the third collet. The sixth electrode 462 and the sixth alignment layer 464 are sequentially formed between the steric liquid crystal layers 470.

The first to fourth substrates 410, 420, 440, and 460 may be glass or plastic substrates, and the first to sixth electrodes 412, 422, 426, 442, 446, and 462 may be indium tin. It may be made of a transparent conductive material such as indium tin oxide or indium zinc oxide.

Here, the first to third cholesteric liquid crystal layers 430, 450, and 470 have different chiral pitches. For example, the first cholesteric liquid crystal layer 430 has a chiral pitch corresponding to a red wavelength, and the second cholesteric liquid crystal layer 450 has a chiral pitch corresponding to a green wavelength. The third cholesteric liquid crystal layer 470 may have a chiral pitch corresponding to the blue wavelength.

When the physical property values of the first to third cholesteric liquid crystal layers 430, 450, and 470 used in the lens of the glasses for a stereoscopic image forming system according to another embodiment of the present invention are obtained by simulation, the results are shown in Table 2. Can be.

n Δn p (nm) λ ₀ Δλ First cholesteric liquid crystal layer 1.55 0.15 420 630 61 Second cholesteric liquid crystal layer 1.55 0.2 360 540 70 Tertiary cholesteric liquid crystal layer 1.55 0.2 310 465 60

Meanwhile, FIG. 16 is a graph showing the selective reflection wavelength and the bandwidth of the selective reflection wavelength of the first to third cholesteric liquid crystal layers (330 and 360 of FIG. 5) according to the property values.

The present invention is not limited to the above embodiments, and various changes and modifications can be made without departing from the spirit of the present invention.

310: first substrate 312: first electrode
314: first alignment layer 320: second substrate
322: second electrode 324: second alignment layer
330: first cholesteric liquid crystal layer 340: third substrate
342: third electrode 344: third alignment layer
350: fourth substrate 352: fourth electrode
354: fourth alignment layer 360: second cholesteric liquid crystal layer

Claims (12)

A display device configured to output a left eye image of the first wavelength region and a right eye image of the second wavelength region in a first frame, and output a right eye image of the first wavelength region and a left eye image of the second wavelength region in a second frame; ;
Glasses comprising a left eye lens and a right eye lens for selectively transmitting the light of the first wavelength region and the second wavelength region
/ RTI >
In the first frame, the left eye lens transmits a left eye image of the first wavelength region, and the right eye lens transmits a right eye image of the second wavelength region, and in the second frame, the left eye lens is the second wavelength region. And a right eye image transmitting the left eye image of the right eye lens and a right eye image of the first wavelength region.
The method according to claim 1,
Each of the left eye lens and the right eye lens includes first and second electrodes, a first cholesteric liquid crystal layer, third and fourth electrodes, and third and fourth electrodes between the first and second electrodes. And a second cholesteric liquid crystal layer therebetween, wherein the first cholesteric liquid crystal layer and the second cholesteric liquid crystal layer have different pitches.
The method according to claim 2,
In the first frame, the left eye lens is applied voltage to the first and second electrodes, the voltage is not applied to the third and fourth electrodes, and the right eye lens is applied to the first and second electrodes. No voltage is applied to the third and fourth electrodes while no voltage is applied to the first and second electrodes in the second frame, and the third and fourth electrodes are not applied. The voltage is applied to the right eye lens, the voltage is applied to the first and second electrodes, and the voltage is not applied to the third and fourth electrodes.
The method according to claim 2,
And the first cholesteric liquid crystal layer has a pitch corresponding to a red wavelength, and the second cholesteric liquid crystal layer has a pitch corresponding to a cyan wavelength.
The method according to claim 2,
Each of the left eye lens and the right eye lens further includes a third cholesteric liquid crystal layer between the fifth and sixth electrodes and the fifth and sixth electrodes, and the third cholesteric liquid crystal layer is the first cholesteric liquid crystal layer. And a second cholesteric liquid crystal layer having a different pitch.
The method according to claim 5,
The first cholesteric liquid crystal layer has a pitch corresponding to the red wavelength, the second cholesteric liquid crystal layer has a pitch corresponding to the green wavelength, and the third cholesteric liquid crystal layer corresponds to the blue wavelength. Stereoscopic image implementation system having a pitch.
The method according to claim 1,
The left and right eye lenses are stereoscopic image implementation system that is switched at a frequency of 120Hz.
And a left eye lens and a right eye lens, respectively transmitting different wavelength regions of the image output from the display device.
Each of the left eye lens and the right eye lens includes first and second electrodes, a first cholesteric liquid crystal layer, third and fourth electrodes, and third and fourth electrodes between the first and second electrodes. And a second cholesteric liquid crystal layer therebetween, wherein the first cholesteric liquid crystal layer and the second cholesteric liquid crystal layer have different pitches.
The method according to claim 8,
And the first cholesteric liquid crystal layer has a pitch corresponding to a red wavelength, and the second cholesteric liquid crystal layer has a pitch corresponding to a cyan wavelength.
The method according to claim 8,
Each of the left eye lens and the right eye lens further includes a third cholesteric liquid crystal layer between the fifth and sixth electrodes and the fifth and sixth electrodes, and the third cholesteric liquid crystal layer is the first cholesteric liquid crystal layer. And glasses having a different pitch from the second cholesteric liquid crystal layer.
The method of claim 10,
The first cholesteric liquid crystal layer reflects light of a red wavelength, the second cholesteric liquid crystal layer reflects light of a green wavelength, and the third cholesteric liquid crystal layer reflects light of a blue wavelength. Glasses for stereoscopic imaging system.
The method according to claim 8,
The left eye and right eye lenses are glasses for stereoscopic imaging system that is switched at a frequency of 120Hz.

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