KR20070046240A - Liquid crystal display having thin polarizing plate - Google Patents

Abstract

The present invention relates to a liquid crystal display device having a thin polarizing plate. The thin plate polarizing plate devised in the present invention is not only a polarizing function but also may function as an alignment film, and may further include an electrode function. Excluding the transparent electrode coating process, the alignment film coating process, the rubbing process, and the polarizing plate attaching process among the existing manufacturing processes of the liquid crystal display device, it is possible to reduce the equipment investment required for the production of the liquid crystal display device and reduce the production cost.

According to the present invention, a two-dimensional image and a three-dimensional stereoscopic image can be easily observed. In addition, there is no limitation on the viewing angle in the up, down, left, and right directions, and there is no limitation on the viewing distance in the front and rear directions even when the 3D stereoscopic image is observed.

Thin polarizer, liquid crystal display, 3D stereoscopic image, alignment film

Description

Liquid Crystal Display Having Thin Polarizing Plate

1 is a structure diagram of a conventional liquid crystal display device.

2 is an explanatory diagram of a principle of a conventional liquid crystal display device.

3 is an explanatory view of the principle of a conventional liquid crystal display.

4 is an explanatory view of a rubbing method of a conventional liquid crystal display device.

5 is a processing result diagram by a rubbing method of a conventional liquid crystal display device.

6 is an exemplary view of a thin plate polarizer structure used in the present invention.

7 is a view showing a state in which an insulating layer is coated on the surface of a thin polarizing plate.

8 is a view showing an alignment state of a thin plate polarizing plate of the present invention and a liquid crystal.

9 is a structural diagram of a first embodiment of the present invention

FIG. 10 is a first embodiment structural diagram of a thin polarizing plate applied to FIG. 9. FIG.

FIG. 11 is a second embodiment structure diagram of a thin plate polarizing plate applied to FIG. 9. FIG.

12 is a structural diagram of a second embodiment of the present invention.

FIG. 13 is a first embodiment structural diagram of a thin plate polarizing plate applied to FIG. 12. FIG.

FIG. 14 is a diagram of a second embodiment of a thin plate polarizing plate applied to FIG. 12. FIG.

FIG. 15 is a third embodiment structural diagram of a thin plate polarizing plate applied to FIG. 12. FIG.

FIG. 16 is a fourth embodiment of the thin polarizing plate applied to FIG. 12. FIG.

FIG. 17 is a fifth embodiment of a thin polarizing plate applied to FIG. 12. FIG.

18 is a sixth embodiment of a thin polarizing plate applied to FIG. 12.

19 is a structural diagram of a third embodiment of the present invention.

20 is a structural diagram of a thin polarizing plate applied to FIG. 19.

21 is a structural diagram of a fourth embodiment of the present invention.

FIG. 22 is a structural diagram of a thin plate polarizing plate applied to FIG. 21. FIG.

     <Description of Symbols for Major Parts of Drawings>

 9: color filter 10: liquid crystal layer

 11: second transparent substrate 12: second polarizing plate (90 ° or 135 °)

 13 transparent substrate 14 alignment layer

 15 lattice 16: insulation layer

 17: fibrous cloth 18: roller

 20 planarization film 21 first polarization region (0 ° or 45 °)

 22: second polarization region (90 ° or 135 °) 23: third alignment film

 24: fourth alignment film 25: third polarization region (90 ° or 135 °)

 26: fourth polarization region (0 ° or 45 °) 27: polarized glasses

 28: polarized glasses for the left eye 29: polarized glasses for the right eye

 30: 9th polarization area (90 ° or 135 °) 31: 10th polarization area (0 ° or 45 °)

 44: fifth polarization region (0 ° or 45) 45: sixth polarization region (90 ° or 135 °)

 46: fifth alignment film 47: sixth alignment film

 48: seventh polarization region (90 ° or 135 °) 49: eighth polarization region (0 ° or 45 °)

 58: 11th polarization area (0 ° or 45 °) 59: 12th polarization area (90 ° or 135 °)

 65: thirteenth polarization region (0 ° or 45 °) 68: thirteenth polarization region (90 ° or 135 °)

 72: 15th polarization region (0 ° or 45 °) 73: 16th polarization region (90 ° or 135 °)

 74: 17th polarization area (0 ° or 45 °) 75: 18th polarization area (90 ° or 135 °)

 78: 19th polarization area (0 ° or 45 °) 79: 20th polarization area (90 ° or 135 °)

 88: twenty-first polarization area (0 ° or 45 °) 89: twenty-second polarization area (90 ° or 135 °)

 98: 23rd polarization region (0 ° or 45 °) 99: 24th polarization region (90 ° or 135 °)

The present invention relates to a liquid crystal display device having a thin polarizing plate. More particularly, the present invention relates to a liquid crystal display device having a thin polarizing plate capable of displaying two-dimensional images and three-dimensional stereoscopic images.

As a prior art related to the present invention, Korean Patent No. 10-0483352 discloses a similar technique in a liquid crystal display device having a thin plate polarizing plate and a retardation plate. In addition, U.S. Patent No. 6,122,103 to Moxtek, Inc. discloses a technology related to a thin film polarizing plate that can produce a polarizing plate using an aluminum thin film. US Patent No. 6,813,077 to Corning Inc. discloses a technique for manufacturing a thin film polarizing plate having a wire grid structure by an imprint method.

In addition, US Patent Nos. 5,772,905 and 6,900,126 disclose nanoimprint lithography using polymers. US Patent No. 6,174,394 to Optiva, Ltd. discloses a polarizing nanomaterial (TCF) prepared by a technique related to a polarizing nanomaterial thin film.

1 is a structural diagram of a conventional liquid crystal display device 1, and FIGS. 2 and 3 are diagrams showing the principle of the conventional liquid crystal display device 1. As shown in FIG.

In the conventional liquid crystal display device 1, the first polarizing plate 3 is positioned on the front surface of the backlight unit 2, and the first transparent substrate 4 and the pixel electrode are disposed on the front surface of the first polarizing plate 3. 5) and the liquid crystal layer 10 filled with the first alignment layer 6 and the liquid crystal material are sequentially disposed, followed by the second alignment layer 7, the transparent electrode 8, and the color filter 9. ), The second transparent substrate 11 and the second polarizing plate 12 are sequentially arranged.

The operation principle of the liquid crystal display device is shown in FIGS. 2 and 3. First, a state in which no electric signal is applied will be described. As shown in FIG. 2, the light emitted from the light source is converted into linearly polarized light while passing through the first polarizing plate 3, and then passes through the pixel electrode 5 and the first alignment layer 6. The polarization direction is changed by 90 ° while passing through the liquid crystal layer 10 and passes through the second alignment layer 7 and the common electrode 8 and passes through the second polarizing plate 12 having the same polarization direction.

On the other hand, when the state in which the electrical signal is applied, as shown in Figure 3 the light from the light source passes through the first polarizing plate 3 is converted into linearly polarized light and then passes through the pixel electrode 5 and the first alignment film 6 The liquid crystal layer 10 passes through. When an appropriate voltage is applied to the pixel electrode 5 and the transparent electrode 8, the liquid crystals are aligned to pass through the second alignment layer 7 and the transparent electrode 8 without changing the polarization direction of the light, and the polarization direction is 90 °. The difference does not pass through the second polarizing plate 12. Here, the first alignment layer 6 and the second alignment layer 7 play a very important role in the alignment of the liquid crystals, and the formation of the alignment layer is performed by forming the fibrous cloth 17 of rayon or nylon type as shown in FIG. 4. By attaching to the roller 18 and rubbing the surface of the alignment film 14 in the direction determined with respect to the transparent substrate 13, the bending direction is formed on the surface of the alignment film as shown in FIG. 5 to determine the alignment direction of the liquid crystal molecules.

However, there are some problems in forming this alignment film as follows. First, coating equipment and drying equipment are needed to form the alignment film, and then a rubbing process equipment is required to make the liquid crystals by making fine grooves on the alignment film, and an apparatus and generation for preventing static electricity generated during the rubbing process There is a need for a device for removing fine dust. The rubbing rollers need to be replaced at regular intervals after a short period of use, and there are various problems such as the need to attach polarizing plates to upper and lower surfaces of the liquid crystal panel. Therefore, there is an urgent need for process development that improves these problems.

SUMMARY OF THE INVENTION The present invention has been made to solve the problems of the prior art, and an object of the present invention is to use a thin film polarizing plate to which nanotechnology is applied, so that the thin film polarizing plate may include a polarizing function as well as an alignment film function and an electrode function. In the manufacturing process of the display device, the transparent electrode coating process, the alignment film application process, the rubbing process and the polarizing plate attaching process can be omitted, thereby reducing the investment in the liquid crystal display device and reducing the production cost. To provide.

Still another object of the present invention is a thin polarizing plate made of a polarizing plate by processing an aluminum thin film very precisely, a polarizing plate of a nanoimprint lithography method using a polymer, or a polarizing nanomaterial thin film by uniformly applying a polarizing nanomaterial (TCF). The present invention provides a three-dimensional image display apparatus that can observe a two-dimensional image and a three-dimensional stereoscopic image.

In order to achieve the object of the present invention, the configuration of the present invention includes a fine pattern of conductive gratings having a polarizing function on a transparent substrate, and an insulating layer is coated on the valleys and floors of the grid so that the valleys and floors of the surface of the insulating layer are liquid crystal. A structure that can serve as an alignment layer of a display device, and the configuration of the liquid crystal display device according to the first embodiment of the present invention to which the above structure is applied is as follows.

A first transparent substrate is provided on the front surface of the backlight unit, and the first polarization region having an integral polarization direction of 0 ° or 45 ° and the second polarization region having a polarization direction of 90 ° or 135 ° are alternately formed. Located on the same plane as the furnace, the first polarization area and the second polarization area have a function of pixel electrodes because they are conductive thin plate polarizers, and have a first alignment film formed by valleys and floors on their surfaces. Next, a liquid crystal layer filled with liquid crystal is disposed, and a second alignment layer is disposed, and the second alignment layer has a common electrode function in which the third polarization region and the fourth polarization region formed on the rear surface of the second transparent substrate have a common electrode function. Since it is a conductive thin plate polarizer, the second alignment film is formed by the valleys and floors on the surface thereof, and the polarization direction of the first polarization region and the second polarization region cross 90 degrees on the front surface of the second alignment film. In the structure, the third polarization region and the fourth polarization region are formed in the form of a thin plate polarizer on the same plane, and the thin plate polarizer serves as a common electrode, and then the planarization film, the color filter, and the second transparent substrate are disposed. It is characterized by.

In the second embodiment of the present invention, the structures of the fifth polarization region and the sixth polarization region on the surface of the first transparent substrate are in the form of chessboard, or in a vertical line, and the material is a conductive metal.

 The structure of the back of the second transparent substrate is also in the form of a chessboard, or in the form of a vertical line, the material is characterized in that the liquid crystal layer is disposed between the seventh and eighth polarization region using a conductive metal.

That is, a chessboard form having a structure in which the fifth polarization region and the sixth polarization region are alternated on the front surface of the first transparent substrate, or in the form of a vertical line, and the material is made of a conductive metal, and is formed on the surface of the rear surface of the second transparent substrate. The seventh polarization region and the eighth polarization region are alternately formed in the form of a chessboard or a vertical line, and the material is made of a conductive metal. Polarization regions at positions corresponding to each other of the first transparent substrate and the second transparent substrate are arranged to have different polarization directions.

Here, the fifth polarization region has a polarization direction of 0 ° or 45 ° and the seventh polarization region has a polarization direction of 90 ° or 135 °, and the polarization direction crosses 90 ° between these fifth and seventh polarization regions. . Similarly, the polarization direction crosses 90 degrees between the sixth and eighth polarization regions.

In the third embodiment of the present invention, unlike the structures of the first and second embodiments, the pixel electrodes are all made of a conductive metal having the same polarization direction, and the common electrode is not divided like the pixel electrode, and the polarization direction is 90 °. It is characterized by a thin polarizing plate of conductive metal, which differs.

Unlike the third embodiment, the fourth embodiment of the present invention uses a non-conductive thin plate polarizer, and the position of the polarizer is disposed outside the transparent substrate, which is the same position as a conventional liquid crystal display.

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

6 is a view showing a structure in which a fine pattern of conductive gratings having a polarization function on a transparent substrate is shown, and FIG. 7 is a view in which an insulating layer is coated on the valleys and floors of the grid, and FIG. 8 is a valley and floors on the surface of the insulating layer. Is a diagram showing that the liquid crystal display can serve as an alignment film. 9 is a structural diagram of a first embodiment of the present invention, and FIGS. 10 and 11 are structural diagrams of a polarizing plate used in FIG. 9. 12 is a second embodiment of the present invention, and FIGS. 13, 14, 15, 16, 17, and 18 are structural diagrams of a polarizing plate used in FIG. 12. 19 is a third embodiment of the present invention, and FIG. 20 is a structural diagram of a polarizing plate used in FIG. 19. 21 is a fourth embodiment of the present invention, and FIG. 22 is a structural diagram of a polarizing plate used in FIG.

<First Embodiment>

A first embodiment of a liquid crystal display device according to the present invention will be described.

In the present invention, reference numerals 21, 22, 25, 26, 30, 31, 44, 45, 48, 49, 58, 59, 65, 68, 72, 73, 74, 75, 78, 79, 88, 89, 98, 99 "is used to distinguish it from a polarizing plate because it has a cross-shaped structure in which the polarization directions cross each other by 90 degrees on one plane.

As shown in FIG. 9, the configuration of the liquid crystal display device capable of displaying two-dimensional and three-dimensional images according to the first embodiment of the present invention is the first transparent substrate 4 on the front surface of the backlight unit 2; ), The first polarization region 21 having a polarization direction of 0 ° or 45 ° and the second polarization region 22 having a polarization direction of 90 ° or 135 ° are integrally formed on the surface thereof. Located on the plane Since the first polarization region 21 and the second polarization region 22 are conductive thin plate polarizers, they have the function of a pixel electrode. There is a third alignment film 23 formed by the valleys and ridges on the surface thereof, followed by the liquid crystal layer 10 filled with liquid crystal, and then the fourth alignment film 24.

 Since the fourth alignment layer 24 is a conductive thin film polarizing plate having a common electrode function, the third polarization region 25 and the fourth polarization region 26 formed on the rear surface of the second transparent substrate 11 have their surfaces. The fourth alignment film 24 is formed by the valleys and floors. The third polarization region 25 and the fourth polarization region 26 have a structure in which the polarization direction of the first polarization region 21 and the second polarization region 22 cross each other by 90 ° on the front surface of the fourth alignment layer 24. It is formed in the form of a thin plate polarizer on such a plane. The thin plate polarizer serves as a common electrode on its entire surface. Next, the planarizing film 20, the color filter 9, and the second transparent substrate 11 are disposed, and the 3D stereoscopic image can be observed through the polarizing glasses 27 disposed on the front of the liquid crystal display. Will be.

10 and 11 only show thin-film polarizing plates used in the first embodiment. FIG. 10 illustrates a thin plate polarizer of the first polarization area 21 and the second polarization area 22 divided into pixel units to perform a pixel electrode function, a polarization function, and an alignment layer function. In the thin plate polarizer of the third polarization region 25 and the fourth polarization region 26, each polarization region is connected to a conductive material to perform a common electrode function, a polarization function, and an alignment layer function.

FIG. 11 is a thin plate polarizer of the first polarization area 21 and the second polarization area 22 is divided into pixel units as shown in FIG. 10 to perform a pixel electrode function, a polarization function, and an alignment layer function. In the thin plate polarizer of the ninth polarization region 30 and the tenth polarization region 31, each polarization region is divided into pixels, but all are connected by a conductive material to perform a common electrode function, a polarization function, and an alignment layer function.

The operation of the liquid crystal display according to the first embodiment of the present invention as described above is as follows.

First, when the light passes through the first polarization region 21 formed on the front surface of the first transparent substrate 4 through the backlight unit 2, the light is linearly polarized at 0 ° or 45 °, and the liquid crystal layer 10 is removed. Since the polarization direction is a linearly polarized state rotated by 90 ° while passing through the third polarization region 25 having a 90 ° or 135 ° polarization direction, the viewer can see the image.

When the light emitted from the backlight unit 2 passes through the second polarization region 22 formed on the front surface of the first transparent substrate 4, the light is linearly polarized at 90 ° or 135 °, and the liquid crystal layer 10 Since the polarization direction is in a linearly polarized state in which the polarization direction is rotated by 90 °, the viewer can see the image by passing through the fourth polarization region 26 having the polarization direction of 0 ° or 45 °.

Accordingly, in the liquid crystal display device, the first polarization region 21 and the third polarization region 25 are matched to the pitch of the pixel, and the second polarization region 22 and the fourth polarization region 26 are aligned. After the pixel pitch is matched, the right eye image is displayed in the odd column and the left eye image is displayed in the even column in the liquid crystal display. In the fourth polarization region 26, the right eye image is transmitted and the third polarization region ( In 25, the left eye image is transmitted. Therefore, the viewer can view a three-dimensional stereoscopic image through the polarized glasses 27.

Although not shown separately, the first polarization area 21, the second polarization area 22, the third alignment film 23, the liquid crystal layer 10, the fourth alignment film 24, and the third polarization area 25 are not shown. And the arrangement order of the fourth polarization region 26, the planarization film 20, and the color filter 9, as shown in FIGS. 1 and 9, the first polarization region 21 and the second polarization region 22. ), Insulating layer, pixel electrode 5, first alignment film 6, liquid crystal layer 10, second alignment film 7, transparent electrode 8, planarization film 20, color filter 9, Even if the polarization glasses 27 are arranged in the arrangement order of the three polarization regions 25 and the fourth polarization regions 26, the viewer can view the 3D stereoscopic image.

In addition, when the 1/4 phase difference plate for making circularly polarized light is disposed on the front surface of the second transparent substrate 11 and the polarizing glasses 27 are replaced with circularly polarized glasses, the viewer's stereoscopic image viewing angle is enlarged.

Second Embodiment

A second embodiment of the two-dimensional and three-dimensional liquid crystal display device according to the present invention will be described. 12 is a structural diagram of a second embodiment of the present invention.

As shown in FIG. 12, the liquid crystal display device capable of displaying a two-dimensional image and a three-dimensional image according to the second embodiment of the present invention is replaced with a structure in which the thin polarizing plate is different from the first embodiment. do. This will be described in detail as follows.

 As shown in FIG. 12, the configuration of the liquid crystal display device capable of displaying two-dimensional and three-dimensional images according to the second embodiment of the present invention is the first transparent substrate 4 on the front of the backlight unit (2). Chess piece having a structure in which a fifth polarization region 44 having a polarization direction of 0 ° or 45 ° and a sixth polarization region 45 having a polarization direction of 90 ° or 135 ° are intersected with each other. Located on the same plane in the form of a plate. Since the fifth polarization region 44 and the sixth polarization region 45 are conductive thin plate polarizers, they have the function of a pixel electrode. There is a fifth alignment film 46 formed by the valleys and the ridges on the surface thereof, and then the liquid crystal layer 10 filled with liquid crystal is disposed. Next, a sixth alignment layer 47 is disposed. In the sixth alignment layer 47, the seventh polarization region 48 and the eighth polarization region 49 formed on the rear surface of the second transparent substrate 11 function as a common electrode. Since it is a conductive thin plate polarizing plate having a thin film, the sixth alignment film 47 is formed by the valleys and the floors on the surfaces thereof. The seventh polarization region 48 and the eighth polarization region 49 have a structure in which the polarization direction of the fifth polarization region 44 and the sixth polarization region 45 cross each other by 90 ° on the front surface of the sixth alignment layer 47. The intersecting structure of the chessboard is formed in the form of a thin plate polarizer on the same plane, and the thin plate polarizer serves as a common electrode as a whole. Next, the planarizing film 20, the color filter 9, and the second transparent substrate 11 are disposed, and the 3D stereoscopic image can be observed through the polarizing glasses 27 disposed on the front of the liquid crystal display. Will be.

13, 14, 15, 16, 17 and 18 are diagrams showing the structure of a thin plate polarizer used in the second embodiment.

FIG. 13 illustrates a thin plate polarizer of the fifth polarization region 44 and the sixth polarization region 45 having a structure in which the red, green, and blue pixels are crossed to each other and divided into pixel units in the form of a chessboard. And alignment film functions. The thin plate polarizers of the seventh and eighth polarization regions 48 and 49 have a staggered structure, which binds red, green, and blue pixels to each other in the form of a chessboard. Function and alignment film function.

FIG. 14 is a thin plate polarizer of the fifth polarization region 44 and the sixth polarization region 45. The red, green, and blue pixels are arranged in a staggered structure, and are divided into pixel units as shown in FIG. It performs electrode function, polarization function and alignment film function. The thin plate polarizers of the eleventh polarization area 58 and the twelfth polarization area 59 have a staggered structure in which red, green, and blue pixels are bundled, and each polarization area is connected with a conductive material in the form of a chessboard to form a common electrode function and polarization. Function and alignment film function.

FIG. 15 illustrates a thin plate polarizer of the fifth polarization region 44 and the sixth polarization region 45 in the form of a chessboard having a staggered structure, divided into pixel units as shown in FIG. 15 to provide pixel electrode functions, polarization functions, and alignment layer functions. Perform. The thin plate polarizing plates of the seventeenth polarization region 74 and the eighteenth polarization region 75 are in the form of a chessboard having a staggered structure.

FIG. 16 illustrates thin plate polarizers of the fifth polarization region 44 and the sixth polarization region 45 in the form of vertical lines having a staggered structure, divided into respective pixel units as shown in FIG. 16 to perform pixel electrode functions, polarization functions, and alignment layer functions. do. The thin plate polarizing plates of the nineteenth polarization region 78 and the twentieth polarization region 79 have a mutually staggered structure.

FIG. 17 illustrates a thin plate polarizer of the fifth polarization region 44 and the sixth polarization region 45 in the form of a vertical column in a staggered structure, divided into three pixel units of red, green, and blue as shown in FIG. 17. It performs the polarization function and the alignment film function. The thin plate polarizer of the twenty-first polarization region 88 and the twenty-second polarization region 89 has a structure in which red, green, and blue pixels are bundled to alternate with each other.

FIG. 18 illustrates a thin plate polarizer of the fifth polarization region 44 and the sixth polarization region 45 in the form of a vertical column in a staggered structure, divided into three pixel units of red, green, and blue as shown in FIG. 17. It performs the polarization function and the alignment film function. The thin plate polarizers of the twenty-third polarization region 98 and the twenty-fourth polarization region 99 have a structure in which three pixel units, red, green, and blue, are integrated with each other.

 The operation of the liquid crystal display device according to the second embodiment of the present invention will be described. First, when the light passes through the fifth polarization region 44 formed on the front surface of the first transparent substrate 4 through the backlight unit 2, the light is linearly polarized at 0 ° or 45 °, and the liquid crystal layer 10 is removed. As the polarization direction is rotated by 90 ° while passing through, the polarization direction passes through the seventh polarization region 48 having the 90 ° or 135 ° polarization direction, thereby allowing the viewer to view an image.

When the light emitted from the backlight unit 2 passes through the sixth polarization region 45 formed on the front surface of the first transparent substrate 4, the light is linearly polarized by 90 ° or 135 °, and the liquid crystal layer 10 Since the polarization direction is rotated by 90 ° while passing through), the viewer passes through the eighth polarization region 49 having the polarization direction of 0 ° or 45 °, thereby allowing the viewer to view an image.

Accordingly, in the liquid crystal display, the fifth polarization region 44 and the seventh polarization region 48 are matched to the pitch of the pixels, and the sixth polarization region 45 and the eighth polarization region 49 are aligned. After the pixel pitch is matched, the right eye image is displayed at a position corresponding to the sixth polarization region 45 and the left eye image is displayed at a position corresponding to the fifth polarization region 44. The right eye image is transmitted in the eighth polarization region 49 and the left eye image is transmitted in the seventh polarization region 48. Therefore, the viewer can view a three-dimensional stereoscopic image through the polarized glasses 27.

Although not illustrated separately, the fifth polarization region 44, the sixth polarization region 45, the fifth alignment layer 46, the liquid crystal layer 10, the sixth alignment layer 47, and the seventh polarization region 48 are described. The arrangement order of the eighth polarization region 49, the planarization film 20, and the color filter 9 is as shown in FIGS. 1 and 12, and the fifth polarization region 44 and the sixth polarization region 45. ), Insulating layer, pixel electrode 5, first alignment film 6, liquid crystal layer 10, second alignment film 7, transparent electrode 8, planarization film 20, color filter 9, Even if the polarization glasses 27 are arranged in the arrangement order of the seventh polarization region 48 and the eighth polarization region 49, the viewer can view the 3D stereoscopic image.

In addition, when the 1/4 phase difference plate for making circularly polarized light is disposed on the front surface of the second transparent substrate 11 and the polarizing glasses 27 are replaced with circularly polarized glasses, the viewer's stereoscopic image viewing angle is enlarged.

Third Embodiment

A third embodiment of the liquid crystal display device according to the present invention will be described. 19 is a structural diagram of a third embodiment of the present invention.

As shown in FIG. 19, in the liquid crystal display according to the third embodiment of the present invention, the structure of the thin polarizing plate is replaced with another structure from those of the first and second embodiments. This will be described in detail as follows.

 As shown in FIG. 19, in the configuration of the liquid crystal display according to the third embodiment of the present invention, the first transparent substrate 4 is disposed on the front surface of the backlight unit 2, and the polarization direction is zero on the surface thereof. The thirteenth polarization region 65, which is degrees or 45 degrees, is located. Since the thirteenth polarization region 65 is a conductive thin plate polarizer, it has the function of a pixel electrode at the same time. There is a seventh alignment film 66 formed by the valleys and the ridges on the surface thereof, and then the liquid crystal layer 10 filled with liquid crystal is disposed. Next, an eighth alignment layer 67 is disposed, and the eighth alignment layer 67 is a conductive thin film polarizer having a common electrode function in the fourteenth polarization region 68 formed on the rear surface of the second transparent substrate 11. Therefore, the eighth alignment film 67 is formed by the valleys and the floors on the surfaces thereof. The fourteenth polarization region 68 is formed on the front surface of the eighth alignment layer 67 in the form of a thin plate polarizer in a structure in which the polarization direction intersects with the thirteenth polarization region 65 by 90 °. The thin plate polarizer serves as a common electrode on its entire surface. Next, the planarization film 20, the color filter 9, and the second transparent substrate 11 are disposed.

20 shows only a thin polarizing plate picture used in the third embodiment. FIG. 20 illustrates that the thin plate polarizer of the thirteenth polarization region 65 is divided into pixel units to perform a pixel electrode function, a polarization function, and an alignment layer. The thin plate polarizer of the fourteenth polarization region 68 has a common surface as a conductive material. It performs electrode function, polarization function and alignment film function.

The operation of the liquid crystal display device according to the third embodiment of the present invention will be described. First, when the light passes through the thirteenth polarization region 65 formed on the front surface of the first transparent substrate 4 through the backlight unit 2, the light is linearly polarized at 0 ° or 45 °, and the liquid crystal layer 10 is removed. Since the polarization direction is a linearly polarized state in which the polarization direction is rotated by 90 °, the viewer can see the image through the 14th polarization region 68 having the 90 ° or 135 ° polarization direction.

Fourth Embodiment

A fourth embodiment of the liquid crystal display device according to the present invention will be described. 21 is a structural diagram of a fourth embodiment of the present invention.

As shown in FIG. 21, the liquid crystal display according to the fourth embodiment of the present invention has a structure in which the thin polarizing plate is different from the third embodiment. This will be described in detail as follows.

 As shown in FIG. 21, in the configuration of the liquid crystal display according to the fourth embodiment of the present invention, the fifteenth polarization region 72 is positioned on the front surface of the backlight unit 2, and the first transparent substrate 4 is disposed on the front surface thereof. ), The pixel electrode 5, the first alignment layer 6, and the liquid crystal layer 10 filled with the liquid crystal material are sequentially disposed. Next, the second alignment layer 7, the common electrode 8, the color filter 9, the second transparent substrate 11, and the sixteenth polarization region 73 are disposed.

And FIG. 22 shows only a thin polarizing plate picture used in the fourth embodiment. The thin plate polarizers of the fifteenth polarization region 72 and the sixteenth polarization region 73 of FIG. 22 need not be conductive polarizers.

The operation of the liquid crystal display device according to the fourth embodiment of the present invention will be described. First, when light passes through the fifteenth polarization region 72 through the backlight unit 2, the light is linearly polarized at 0 ° or 45 °, and the polarization direction is rotated 90 ° while passing through the liquid crystal layer 10. Since the linearly polarized state is passed, the viewer can see the image through the sixteenth polarization region 73 having the polarization direction of 90 ° or 135 °.

It is to be understood that the present invention is not limited to the above-described preferred embodiments but may be practiced in various ways without departing from the spirit of the present invention. If you grow up, you can easily understand. Implementation by such improvement, change, substitution or addition is regarded as belonging to the scope of the appended claims below, and the technical spirit is also regarded as belonging to the present invention.

According to the present invention, when a thin film polarizing plate of conductive metal is used, the thin plate polarizing plate may replace the existing stretching type polarizing plate. In addition, since the thin polarizing plate may serve as an alignment film function as well as a polarizing function, and may further include an electrode function, the thin film polarizing plate may include a coating process for a transparent electrode, an alignment film coating process, a rubbing process, and the like. Since the polarizing plate attaching process can be omitted, the equipment investment required for the production of the liquid crystal display device can be reduced and the production cost can be reduced.

In addition, since the optical structure for viewing the two-dimensional image and three-dimensional stereoscopic image can be provided, even when observing the three-dimensional stereoscopic image can be easily seen without adding a separate component. In the present invention, since the polarizing plate is an optical structure positioned very close to the liquid crystal device, there is no limitation of viewing angles in the vertical and horizontal directions, which is the biggest problem of the conventional 3D stereoscopic apparatus, and there is no limitation of viewing distance in the front and rear directions, so that the viewing angle and viewing distance are not limited. It is a very useful invention that can be spotlighted as a next-generation 2D / 3D combined display device because several people can view 3D stereoscopic images simultaneously regardless of the number of people.

Claims (12)

The first transparent substrate 4 is provided on the front surface of the backlight unit 2, and the first polarization region 21 and the second polarization region 22, which are integrally formed on the surface thereof, are positioned on the same plane in a staggered structure. Next, the liquid crystal layer 10 filled with liquid crystal is disposed, and the fourth alignment layer 24, the third polarization region 25, the fourth polarization region 26, the color filter 9 and the second transparent substrate are disposed. In this arranged liquid crystal display device, The first polarization region 21 has a polarization direction of 0 ° or 45 °, and the second polarization region 22 is disposed on the same plane in a structure in which the polarization directions are staggered at 90 ° or 135 °, and the first polarization is The region 21 and the second polarization region 22 are conductive thin plate polarizers, and have a third alignment layer 23 formed by valleys and floors on the surface thereof, followed by a fourth alignment layer after the liquid crystal layer 10. The first polarization region 21 and the second polarization region 22 are arranged next to each other, and the polarization direction of the first polarization region 21 and the second polarization region 22 is 90 °. ) Is formed in the form of a thin polarizing plate on the same plane, and then the flattening film 20 is disposed, the liquid crystal display device having a thin polarizing plate. The first transparent substrate 4 is provided on the front surface of the backlight unit 2, and the fifth polarization region 44 and the sixth polarization region 45 integrally formed on the surface thereof are identical to each other in the form of a chessboard. The liquid crystal layer 10, which is positioned on a plane, and then filled with liquid crystal, is disposed, and the sixth alignment layer 47, the seventh polarization region 48, the eighth polarization region 49, the color filter 9, In the liquid crystal display device wherein the second transparent substrate is disposed, The fifth polarization region 44 has a polarization direction of 0 ° or 45 °, and the sixth polarization region 45 is located on the same plane in a chessboard shape having a polarization direction of 90 ° or 135 °. The fifth polarization region 44 and the sixth polarization region 45 are conductive thin plate polarizers, and have a fifth alignment layer 46 formed by valleys and floors on their surfaces, and the fifth polarization region 44. ) And the sixth polarization area 45 intersect the polarization direction by 90 °, and the seventh polarization area 48 and the eighth polarization area 49, or the eleventh polarization area 58 and the twelfth polarization area ( 59), the seventeenth polarization region 74 and the eighteenth polarization region 75 are formed in the form of a thin plate polarizer on the same plane in the form of a chessboard having a staggered structure, and then the planarization film 19 is disposed. A liquid crystal display device having a thin polarizing plate, characterized in that. The liquid crystal display device according to claim 1 or 2, wherein the thin polarizing plate of the polarizing region has a polarizing function, a conductive property, and an alignment film function. The liquid crystal display device according to claim 1 or 2, further comprising a quarter phase difference plate for producing circularly polarized light on the front surface of the second transparent substrate (11). The thin film polarizing plate of claim 1 or 2, wherein the thin film polarizing plate uses any one of aluminum, silver, copper, gold thin film or polymer having a wire grid structure, or polarizing nano material (TCF). One liquid crystal display. The liquid crystal display of claim 1, wherein the first polarization region 21, the second polarization region 22, the third alignment layer 23, the liquid crystal layer 10, the fourth alignment layer 24, and the third polarization region 25. The order of arranging the fourth polarization region 26, the flattening film 20, and the color filter 9 is the first polarization region 21, the second polarization region 22, the insulating layer, the pixel electrode 5, 1 alignment film 6, liquid crystal layer 10, second alignment film 7, transparent electrode 8, planarization film 20, color filter 9, third polarization region 25 and fourth polarization region ( 26. A liquid crystal display device having a thin polarizing plate, which is replaced by the arrangement order of 26). 3. The fifth polarization region 44, the sixth polarization region 45, the fifth alignment layer 46, the liquid crystal layer 10, the sixth alignment layer 47, and the seventh polarization region 48. The arrangement order of the eighth polarization region 49, the planarization film 20, and the color filter 9 is performed by the fifth polarization region 44, the sixth polarization region 45, the insulating layer, the pixel electrode 5, First alignment film 6, liquid crystal layer 10, second alignment film 7, transparent electrode 8, planarization film 20, color filter 9, seventh polarization region 48 and eighth polarization region A liquid crystal display device having a thin polarizing plate, which is replaced by the arrangement order of (49). 3. The fifth polarization region 44 has a polarization direction of 0 ° or 45 °, and the sixth polarization region 45 has a vertical row shape having a staggered structure with 90 ° or 135 ° polarization directions. The 19th polarization region 78 and the 20th polarization region 79 in a structure in which the polarization direction crosses the fifth polarization region 44 and the sixth polarization region 45 by 90 °. Alternatively, the twenty-first polarization region 88, the twenty-second polarization region 89, the twenty-third polarization region 98, and the twenty-fourth polarization region 99 are arranged in the form of a thin plate polarizer on the same plane in the form of vertical stripes. A liquid crystal display device provided with a thin polarizing plate, characterized in that. The first transparent substrate 4 is located on the front surface of the backlight unit 2, and on the surface thereof is a thirteenth polarization region 65 having a polarization direction of 0 ° or 45 °, followed by a liquid crystal layer filled with liquid crystal. In the liquid crystal display device in which the tenth and eighth alignment layers 67 are disposed, the fourteenth polarization region has a structure in which a polarization direction crosses 90 degrees with the thirteenth polarization region 65 after the eighth alignment layer 67. A liquid crystal display device with a thin polarizing plate, characterized in that 68 is disposed in the form of a thin polarizing plate, and then the flattening film 20 is disposed. 10. The liquid crystal display device according to claim 9, wherein the thin plate polarizing plates of the thirteenth polarizing region and the fourteenth polarizing region have both a polarizing function, a conductive property, and an alignment film function.  A fifteenth polarization region 72 is disposed on the front surface of the backlight unit 2, and a liquid crystal layer filled with the first transparent substrate 4, the pixel electrode 5, the first alignment layer 6, and the liquid crystal material is disposed on the front surface thereof. In the liquid crystal display device in which 10 is sequentially disposed, the liquid crystal layer 10 is next to the second alignment layer 7, the common electrode 8, the color filter 9, the second transparent substrate 11, and the second transparent substrate 11. A liquid crystal display device having a thin polarizing plate, characterized in that 16 polarization regions (73) are arranged. 12. The liquid crystal display device according to claim 11, wherein the thin polarizing plate of the fifteenth polarizing area (72) and the sixteenth polarizing area (73) is a nonconductive thin plate polarizing plate.

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