KR101318484B1 - Sub pannel and three dimensinaol image display having the same - Google Patents

Abstract

The present invention discloses a sub-panel capable of rapidly switching an arrangement of liquid crystals and a stereoscopic image display device including the same.
According to the present invention, since the liquid crystal of the sub-panel is switched at a high speed and the first image and the second image are not mixed, the liquid crystal of the sub-panel is transmitted to the viewer, thereby providing a high-quality stereoscopic image.

Description

SUB PANNEL AND THREE DIMENSINAOL IMAGE DISPLAY HAVING THE SAME}

The present invention relates to a subpanel and a stereoscopic image display apparatus including the same, and more particularly, to a subpanel capable of quickly switching an arrangement direction of liquid crystals and a stereoscopic image display apparatus including the same.

With the rapid development of recent technology, studies on a stereoscopic image display apparatus for converting a 2D image formed on a display apparatus into a 3D stereoscopic image have been actively conducted.

In general, three-dimensional stereoscopic images are generally produced using the principle of binocular disparity through two eyes of a human being.

Since the two eyes of the human being are separated by a certain distance, the images observed from different angles with each eye are input to the brain, which enables the observer to perceive the sense of space by recognizing the three-dimensional feeling.

Among the principles of the 3D image, polarizer glasses are used to convert the polarization of the first image and the second image to be transmitted by including a subpanel on the display device for transmitting the first image and the second image. Then, the light is incident on the polarized glasses to realize a 3D image.

Referring to FIG. 1, the conventional subpanel includes a liquid crystal layer between the first electrode layer 11 and the second electrode layer 12. Therefore, when a voltage is applied to the first electrode layer 11 and the second electrode layer 12, a vertical electric field is formed, so that the liquid crystal L is vertically aligned, and thus the polarization of the first image that does not feel birefringence is emitted as it is. Then, when the voltage is turned off, the liquid crystal is restored horizontally back to its original state, and the second image passing therethrough feels birefringence of λ / 2 retardation, so that the polarization direction is rotated by 90 °.

However, when the vertical electric field is formed, the liquid crystal is vertically aligned relatively quickly, but when the vertical electric field is removed, the liquid crystal is restored to its original state (horizontal state) by its physical properties, so the polarization of the second image is relatively slow. There is a problem that the image quality of the stereoscopic image is deteriorated because the direction cannot be changed in a timely manner.

In addition, since the conventional subpanel is configured to rotate the polarization direction of either the first image or the second image by 90 °, both the first image and the second image maintain linear polarization (45 ° or 135 °). In the method using linear polarization, the transmission plate of the polarizing glasses is tilted according to the head tilting of the observer, so that the first image and the second image are mixed, and a 3D crosstalk phenomenon called ghost is generated. there is a problem.

In order to solve this problem, a configuration for converting linearly polarized light into circularly polarized light by attaching a 1/4 wavelength phase delay film has been recently disclosed. However, a 1/4 wavelength phase delay film is additionally installed to increase the thickness and manufacturing cost. There is a rising problem.

The present invention has been made to solve the above problems, and provides a sub-panel and a stereoscopic image display device including the same capable of quickly switching the liquid crystal array direction.

In addition, the present invention provides a stereoscopic image display device that does not occur 3D crosstalk phenomenon even if the viewer tilts his head.

The present invention also provides a flexible subpanel using a liquid crystal dispersed in a polymer and a stereoscopic image display device including the same.

In the sub-panel according to an aspect of the present invention, the sub-panel for converting the polarization information of the first image and the second image alternately output from the main panel to provide a stereoscopic image to the observer wearing a polarizing glasses, A first substrate that forms a horizontal electric field or fringe electric field in one direction, a second substrate that is spaced apart from the first substrate, and that forms a horizontal electric field or fringe electric field in a second direction, and the first substrate and the second substrate And a liquid crystal layer formed therebetween, wherein the first direction and the second direction cross each other and are formed parallel to the first substrate or the second substrate.

In the sub-panel according to an aspect of the present invention, the first direction and the second direction may be formed perpendicular to each other.

In the sub-panel according to an aspect of the present invention, the first substrate has a first strip electrode and a second strip electrode are alternately arranged in a first direction to form a horizontal electric field in the first direction when a voltage is applied, and the second substrate The substrate may be formed such that the third strip electrode and the fourth strip electrode are alternately disposed in the second direction so that a horizontal electric field is formed in the second direction when a voltage is applied.

In the sub-panel according to an aspect of the present invention, the first power supply unit for applying a voltage between the first strip electrode and the second strip electrode, and the second power supply unit for applying a voltage between the third strip electrode and the fourth strip electrode. It may include.

In the sub-panel according to an aspect of the present invention, a period in which the first power supply unit and the second power supply unit sequentially apply voltages, and the first power supply unit and the second power supply unit sequentially apply voltages are the first image and the second image. The image may be synchronized with a cycle in which the image is alternately output.

In the sub-panel according to an aspect of the present invention, when a voltage is applied by a first power supply unit, the liquid crystals of the liquid crystal layer are arranged in the first direction, and when a voltage is applied by the second power supply unit, Liquid crystals are arranged in the second direction.

In the sub-panel according to an aspect of the present invention, the first substrate has a first electrode layer formed on one surface thereof, and a lower strip electrode disposed on the first electrode layer spaced apart in the first direction so that a fringe electric field is applied in the first direction when voltage is applied. A second electrode layer is formed on a surface facing the first substrate, and an upper strip electrode is spaced apart in a second direction on the second electrode layer in the second direction when a voltage is applied. A fringe electric field can be formed.

In the sub-panel according to an aspect of the present invention, the apparatus further includes a third power supply for applying a voltage between the first electrode layer and the lower strip electrode, and a fourth power supply for applying a voltage between the second electrode layer and the upper strip electrode.

In the sub-panel according to an aspect of the present invention, the third power supply unit and the fourth power supply unit sequentially apply a voltage, and the period in which the third power supply unit and the fourth power supply unit sequentially apply the voltage is the first image and the second. The image may be synchronized with a cycle in which the image is alternately output.

In the sub-panel according to an aspect of the present invention, when a voltage is applied by the third power supply unit, the liquid crystals of the liquid crystal layer are arranged in the first direction, and when the voltage is applied by the fourth power supply unit, Liquid crystals may be arranged in the second direction.

In the sub-panel according to an aspect of the present invention, the first direction is + 45 ° with the polarization direction of the first and second images, and the second direction is -45 ° with the polarization direction of the first and second images. Can be achieved.

In the sub-panel according to an aspect of the present invention, the liquid crystal of the liquid crystal layer may be horizontally aligned with the first substrate and the second substrate.

In the sub-panel according to an aspect of the present invention, the liquid crystal layer may be a quarter wavelength phase delay liquid crystal layer.

In the sub-panel according to an aspect of the present invention, the liquid crystal layer may be formed by dispersing the liquid crystal in the polymer.

In the sub-panel according to an aspect of the present invention, the liquid crystal of the liquid crystal layer may have a long-axis refractive index and a short-axis refractive index different from each other, and either the long-axis refractive index or the short-axis refractive index may be the same as the refractive index of the polymer.

In the sub-panel according to another aspect of the present invention, in the sub-panel for converting the polarization information of the first image and the second image alternately output from the main panel to provide a stereoscopic image to the observer wearing a polarizing glasses, A first substrate forming a horizontal electric field or a fringe electric field in a first direction, a second substrate spaced apart from the first substrate, and the first substrate and the second substrate, and formed by dispersing a liquid crystal in a polymer It includes a liquid crystal layer.

In the sub-panel according to another aspect of the present invention, the liquid crystal of the liquid crystal layer is different from each other in the long-axis refractive index and the short-axis refractive index, and either the long-axis refractive index or the short-axis refractive index is formed to be the same as the refractive index of the polymer .

In a sub-panel according to another aspect of the present invention, a first strip electrode having a predetermined length and a second strip electrode are alternately arranged in a first direction so that a horizontal electric field is formed in the first direction when a voltage is applied. do.

In the sub-panel according to another aspect of the present invention, the first substrate has a first electrode layer formed on one surface thereof, and a lower strip electrode is spaced apart in the first direction on the first electrode layer, so that the voltage is applied in the first direction. A fringe electric field is formed.

According to an aspect of the present invention, a stereoscopic image display apparatus includes a main panel, a sub-panel, and a first and a second image that are alternately outputting a first image and a second image, respectively, to a left lens and a right lens. And incident polarized glasses.

According to the present invention, since the liquid crystal of the sub-panel is switched at a high speed and the first image and the second image are not mixed, the liquid crystal of the sub-panel is transmitted to the viewer, thereby providing a high-quality stereoscopic image.

In addition, since the image is converted to circularly polarized light without the 1/4 wavelength phase delay layer, the 3D crosstalk does not occur even when the viewer tilts the head, thereby improving the image quality of the stereoscopic image, The subpanel can be manufactured and the manufacturing cost is reduced.

In addition, the sub-panel can be made flexible so that it can be utilized in a flexible display device.

1 is a conceptual diagram illustrating a response state of liquid crystals when an electric field is applied to a sub-panel according to the related art and when no electric field is applied;
2 is a schematic diagram showing a configuration of a stereoscopic image display device according to an embodiment of the present invention;
3 is a conceptual diagram illustrating a state in which a liquid crystal is aligned in a first direction by applying a voltage by a first power supply unit according to an embodiment of the present invention.
4 is a side view of FIG. 3 viewed in the A direction,
5 is a conceptual diagram illustrating a state in which a liquid crystal is aligned in a second direction by applying a voltage by a second power supply unit according to an embodiment of the present invention.
FIG. 6 is a side view of FIG. 5 viewed in the A direction; FIG.
7 is a modification of the electrode structure of the sub-panel according to an embodiment of the present invention,
FIG. 8 is a conceptual diagram illustrating a state in which a liquid crystal is aligned in a second direction by applying a voltage by the fourth power supply unit in FIG. 7.
9 is a modification of the liquid crystal layer of the sub-panel according to the embodiment of the present invention,
FIG. 10 is a conceptual diagram illustrating a state in which liquid crystals are aligned by applying a voltage to a sub panel according to FIG. 9 in a second direction.
11 is a conceptual diagram illustrating refractive indices in the major and minor axes of liquid crystals;
FIG. 12 is a timing chart illustrating a relationship between display cycles of a first image and a second image of a main panel, and a formation cycle of a first directional horizontal electric field and a second directional horizontal electric field of a subpanel.

While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Singular expressions include plural expressions unless the context clearly indicates otherwise.

In the present invention, the terms "comprising" or "having ", and the like, specify that the presence of a feature, a number, a step, an operation, an element, a component, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to provide further explanation of the invention as claimed.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described in detail with reference to the drawings, wherein like or corresponding elements are denoted by the same reference numerals, and redundant description thereof will be omitted.

Referring to FIG. 2, a stereoscopic image display device according to an exemplary embodiment of the present invention includes a main panel 200 that alternately displays a first image and a second image, and the first panel displayed on the main panel 200. A sub-panel 300 for converting the image into the first circularly polarized light and converting the second image into the second circularly polarized light, and a polarizing glasses 400 into which the first circularly polarized light and the second circularly polarized light are respectively incident. .

In the present embodiment, a liquid crystal display (LCD) is illustrated as a display device, but the present invention is not limited thereto, but the plasma display device (PDP) and the organic light emitting display device (OLED) for alternately outputting the first image and the second image. The display panel may be implemented as a panel of various display devices.

The liquid crystal display is divided into a backlight unit 100, which serves as a light source, and a main panel 200, which forms an image by controlling light provided from the backlight unit 100.

Since the general configuration of the backlight unit 100 will be apparent to those skilled in the art, further detailed descriptions thereof will be omitted, and in addition to the side type backlight shown in FIG.

Specifically, as shown in FIG. 2, the main panel 200 includes a main liquid crystal layer 230 between the TFT substrate 210 and the color filter substrate 220, and the TFT panel 210 and the color filter substrate 220. The first polarizing plate 240 and the second polarizing plate 250 are attached to the outer surface, respectively. In this case, the polarization axes of the first polarizing plate 240 and the second polarizing plate 250 are formed to be orthogonal to each other, and are configured to control light according to the direction of the liquid crystal. In this case, both the first image and the second image passing through the main panel 200 are linearly polarized light.

The main panel 200 alternately displays a first image to be incident to the observer's left eye and a second image to be incident to the right eye in order to implement a stereoscopic image, and the first image and the second image are arranged in a predetermined order and time. Are displayed alternately.

The sub panel 300 changes polarization information of the first image and the second image that have passed through the main panel 200. That is, the first image and the second image are converted into left circular polarization and right circular polarization, respectively, and provided to the left eye lens 410 and the right eye lens 420 of the polarizing glasses 400 to provide a stereoscopic image to the viewer. At this time, a left circular circular polarizing plate is attached to the left eye lens 410 of the polarizing glasses 400, and a right circular circular polarizing plate is attached to the right eye lens 420.

The sub-panel 300 according to the exemplary embodiment of the present invention may be spaced apart from the first substrate 310 and the first substrate 310 to form a horizontal electric field or fringe electric field in a first direction, and in a second direction. And a second substrate 320 forming a horizontal electric field or fringe electric field, and a liquid crystal layer 330 formed between the first substrate 310 and the second substrate 320.

3 and 4, the first substrate 310 is formed of a transparent material having a predetermined area and capable of transmitting light. In this case, the first direction D1 in which the first strip electrode 311 and the second strip electrode 312 are alternately disposed is a direction parallel to the first substrate 310. Therefore, when a voltage is applied by the first power supply unit V1, a first direction horizontal electric field E1 is generated between the first strip electrode 311 and the second strip electrode 312.

The second substrate 320 is spaced apart from the first substrate 310 at predetermined intervals, and the third substrate 320 is disposed in a second direction D2 perpendicular to the first direction D1 on a surface facing the first substrate 310. The strip electrode 321 and the fourth strip electrode 322 are alternately arranged.

The liquid crystal layer 330 formed between the first substrate 310 and the second substrate 320 may be formed by filling a general nematic liquid crystal, and the thickness of the liquid crystal layer 330 may be a phase of incident linearly polarized light. It is formed to a thickness that can delay the / 4 wavelength. When the first direction horizontal electric field E1 is formed, the liquid crystals L are arranged in the first direction along the electric field.

4 and 5, when a voltage is applied by the second power supply unit V2, a second direction horizontal electric field E2 is formed between the third strip electrode 321 and the fourth strip electrode 322. Therefore, the liquid crystals L are arranged in the second direction from the first direction.

In this case, an insulating film is formed between the first substrate 310 and the second substrate 320 including the strip electrode and the liquid crystal layer 330, and an alignment layer (not shown) for aligning the liquid crystal L is further formed. Can be formed.

The liquid crystal L of the liquid crystal layer 330 is aligned along the rubbing direction of the alignment layer. In the present invention, the liquid crystal L is arranged horizontally with the flat surfaces of the first substrate 310 and the second substrate 320 by the alignment layer. When the liquid crystals L are arranged horizontally with the substrate, the response characteristics of the liquid crystals L are superior to the general twisted nematic (TN) or super twisted nematic (STN) modes, which is advantageous for high-speed switching. In addition, the array characteristics of the liquid crystal L are uniformly arranged in one direction without disturbing, which is advantageous in electro-optical characteristics such as wavelength dispersion characteristics and contrast ratios.

Therefore, when the first direction horizontal electric field E1 by the first power supply unit V1 and the second direction horizontal electric field E2 by the second power supply unit V2 are alternately applied, the liquid crystal L is applied accordingly. Switching at high speed in one direction and second direction.

In this case, the first direction has a + 45 ° difference with the polarization direction of the first image and the second image, and the second direction has a -45 ° difference with the polarization direction of the first image and the second image. Accordingly, when the first image is incident on the liquid crystal layer 330 arranged in the first direction, the first image is converted into left circularly polarized light by a quarter-wave phase retardation, and the liquid crystal layer 330 is arranged in the second direction. When the second image is incident, the second image is phase-delayed by 1/4 wavelength and converted into right polarized light to be incident on the left and right eye lenses of the polarizing glasses, respectively.

Accordingly, the first power supply unit V1 and the second power supply unit V2 sequentially apply voltages to change the arrangement direction of the liquid crystals L, and the first power supply unit V1 and the second power supply unit V2 sequentially. The period of applying the voltage may be configured to be synchronized with the period in which the first image and the second image are alternately output.

According to this configuration, when the first image is output, when the first power supply unit V1 is synchronized to apply a voltage, the liquid crystals L are arranged in the first direction to convert the first image to left circle polarization, and the second image is output. When the second power supply unit V2 is synchronized to apply a voltage, the liquid crystals L are arranged in the second direction to convert the second image to left circularly polarized light. Therefore, the linearly polarized light is converted into circularly polarized light by the liquid crystal layer 330 without a separate quarter-wave retardation film.

At this time, the electrode structure of the sub-panel has been described in a horizontal electric field mode (In-plane switching mode), it may be implemented by a fringe field (Fringe field).

7 and 8, a first electrode layer 313 is formed on the first substrate 310, and lower strip electrodes 314 are spaced apart in the first direction on the first electrode layer. In addition, a second electrode layer 323 may be formed on the second substrate 320, and the upper strip electrode 321 may be spaced apart in the second direction on the second electrode layer 323. In this case, the first direction and the second direction in which the strip electrode is disposed are the same as described above.

Therefore, as shown in FIG. 7, when a voltage is applied between the first electrode layer 313 and the lower strip electrode 314 by the third power supply unit V3, the liquid crystal L is formed by the first direction fringe electric field. Direction and when the voltage is applied by the fourth power supply unit V4 as shown in FIG. 8, the liquid crystals L may be arranged in the second direction. As described above, the first image and the second image emitted from the main display panel may be converted into left circular polarization and right circular polarization, respectively.

9 and 10, the liquid crystal layer 340 of the present invention may be formed of a polymer dispersed liquid crystal (PDLC) in addition to the general nematic liquid crystal. At this time, the liquid crystal (L) is the same as the above-described switching operation of the liquid crystal except that the liquid crystal droplet (B) is present depending on the degree of dispersion in the polymer.

First, the liquid crystals L are arranged in the first direction by the first direction horizontal electric field as shown in FIG. 9, and then the liquid crystals L are arranged in the second direction by the second direction horizontal electric field as shown in FIG. 10. In this manner, the left circle polarization and the right circle polarization can be produced by the liquid crystal droplets B uniformly arranged in the horizontal electric field direction. It is also apparent that it may be implemented by a fringe electric field.

In this case, since the liquid crystal L is dispersed in the polymer, when the first substrate 310 and the second substrate 320 are made of a flexible material, the flexible sub panel may be manufactured. Such a subpanel is suitable for a flexible display device.

In addition, the liquid crystal L positioned in the liquid crystal droplet B is switched in the first direction or the second direction while keeping the first substrate 310 and the second substrate 320 horizontal by a horizontal or fringe electric field.

Referring to FIG. 11, the liquid crystal L arranged in the first direction or the second direction in the liquid crystal drop B has a refractive index n2 in a short axis direction and a refractive index n1 in a long axis direction different from each other. When the refractive index in any one of these directions is the same as the refractive index (n3) of the polymer, the light incident in the thickness direction of the liquid crystal is delayed by a quarter wavelength while minimizing scattering.

For example, when the uniaxial refraction index n2 of the liquid crystal L is equal to the refractive index n3 of the polymer, the incident light does not feel phase delay in the short axis direction, but in the long axis direction of the liquid crystal L. Since the refractive index of the liquid crystal and the polymer is different, the phase delay is felt.

As such, the phase delay due to one direction alignment causes the polarization state of the light to change from linear polarization to another polarization, and is converted to circular polarization when the phase delay in one axial direction is 1/4 wavelength.

According to the present invention, since the incident image is converted into circularly polarized light with little scattering, the stereoscopic image effect is excellent. In this regard, a polymer dispersed liquid crystal (PDLC) is generally dispersed without directivity, which is different from a conventional display device using scattering and transmission.

FIG. 12 is a timing chart illustrating a relationship between a display period of the first image and the second image of the main panel, and a period of the first electric field E1 and the second electric field E2 of the sub-panel.

First, the main panel 200 has a preset frame, and the frame includes a first sub frame displaying a first image and a second sub frame displaying a second image. Therefore, the first image is displayed in the first sub frame for a predetermined period, and then the second image is displayed in the second sub frame. After that, the first image and the second image are repeated in the same manner.

In this case, a third section W3 in which no image is displayed may be provided between the first section W1 in which the first image is displayed and the second section W2 in which the second image is displayed. The third section W3 may have a relatively short period compared to the first section W1 and the second section W2 so that the observer does not feel the disconnection of the image.

Therefore, when the first direction horizontal electric field is formed in the period T2 corresponding to the third section, the liquid crystals L are arranged in the first direction to convert the first image to left circular polarized light, and between the first image and the second image. In the period T1 corresponding to the third section, the liquid crystals L are arranged in the second direction by the horizontal electric field in the second direction, so that the second image may be converted into right polarized light.

Since the liquid crystal (L) is switched in advance before the image is displayed, there is an advantage that can provide a more three-dimensional image to the viewer without deterioration of image quality. If the image is displayed before the liquid crystal L is switched, a part of the image is an elliptical polarized light instead of the left circular polarized light, so that the 3D image quality is lowered by entering the right eye lens as well as the left eye lens.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, It belongs to the scope of right. For example, the flexible sub-panel may be manufactured by applying only the first direction horizontal electric field only by the first substrate and using the polymer dispersed liquid crystal.

100: backlight unit 200: main panel
300: sub panel 310: first substrate
311: first strip electrode 312: second strip electrode
320: second substrate 321: third strip electrode
322: fourth strip electrode 330: liquid crystal layer
400: polarized glasses

Claims (20)

In the sub-panel for converting the polarization information of the first image and the second image output alternately from the main panel to provide a stereoscopic image to the observer wearing a polarized glasses,
A first substrate forming a horizontal electric field or a fringe electric field in a first direction;
A second substrate spaced apart from the first substrate and forming a horizontal electric field or a fringe electric field in a second direction; And
And a liquid crystal layer formed between the first substrate and the second substrate.
The first direction and the second direction cross each other,
When the horizontal electric field or fringe electric field is formed in the first direction, the liquid crystal of the liquid crystal layer is arranged in the first direction, and when the horizontal electric field or fringe electric field is formed in the second direction, the liquid crystal of the liquid crystal layer is formed in the second direction. Sub-panel arranged with. The sub-panel of claim 1, wherein the first direction and the second direction are perpendicular to each other. According to claim 1, wherein the first substrate and the first strip electrode and the second strip electrode are alternately arranged in the first direction to form a horizontal electric field in the first direction when voltage is applied,
In the second substrate, the third strip electrode and the fourth strip electrode are alternately disposed in the second direction so that a horizontal electric field is formed in the second direction when a voltage is applied. The sub-panel of claim 3, further comprising a first power supply unit applying a voltage between the first strip electrode and the second strip electrode, and a second power supply unit applying a voltage between the third strip electrode and the fourth strip electrode. . 5. The cycle of claim 4, wherein the first power supply and the second power supply sequentially apply voltages, and the first power supply and the second power supply sequentially apply voltages. 6. Sub-panel synchronized with the cycle output. The liquid crystal of claim 4, wherein the liquid crystal of the liquid crystal layer is arranged in the first direction when a voltage is applied by the first power supply, and the liquid crystal of the liquid crystal layer is applied when the voltage is applied by the second power supply. Sub-panel arranged in two directions. The first substrate of claim 1, wherein a first electrode layer is formed on one surface of the first substrate, and a lower strip electrode is spaced apart in a first direction on the first electrode layer to form a fringe electric field in the first direction when voltage is applied.
The second substrate has a second electrode layer formed on a surface facing the first substrate, and an upper strip electrode is spaced apart in a second direction on the second electrode layer to form a fringe electric field in the second direction when voltage is applied. Sub-panel. The sub-panel of claim 7, further comprising a third power supply for applying a voltage between the first electrode layer and the lower strip electrode, and a fourth power supply for applying a voltage between the second electrode layer and the upper strip electrode. The method of claim 8, wherein the third power source and the fourth power supply unit sequentially apply voltage, and the third and fourth power supply units sequentially apply voltage in the first image and the second image alternately. Sub-panel synchronized with the cycle output. The liquid crystal of claim 8, wherein the liquid crystal of the liquid crystal layer is arranged in the first direction when the voltage is applied by the third power supply, and the liquid crystal of the liquid crystal layer is applied when the voltage is applied by the fourth power supply. Sub-panel arranged in two directions. The sub-panel of claim 1, wherein the first direction is + 45 ° with the polarization directions of the first and second images, and the second direction is -45 ° with the polarization directions of the first and second images. The sub-panel of claim 1, wherein the liquid crystal of the liquid crystal layer is oriented horizontally on the first substrate and the second substrate. The subpanel of claim 1, wherein the subpanel converts incident light into circularly polarized light. The sub-panel of claim 1, wherein the liquid crystal layer is formed by dispersing a liquid crystal in a polymer. 15. The sub-panel of claim 14, wherein the liquid crystal of the liquid crystal layer has a long-axis refractive index and a short-axis refractive index different from each other, and either the long-axis refractive index or the short-axis refractive index is equal to the refractive index of the polymer. delete delete delete delete A main panel for alternately outputting a first image and a second image;
A sub panel according to any one of claims 1 to 15; And
And polarizing glasses, wherein the first image and the second image are incident to the left and right lens, respectively.

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