JP2007334298A - Liquid crystal display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve the luminance of a liquid crystal display device by reducing the light loss generated in a light shielding region. <P>SOLUTION: The liquid crystal display device is equipped with a backlight module 102, a first transparent substrate 106, a second substrate 114, and a liquid crystal layer 110. The backlight module 102 has a light exit surface 101. The first transparent substrate 106 is arranged on one side of the light exit surface 101 of the backlight module 102, and is formed with a plurality of high refractive index regions 108 on one surface adjacent to the light exit surface 101 within one same surface of the first transparent substrate 106. The refractive index of the high refractive index regions 108 is greater than the refractive index of the first transparent substrate 106. A second substrate 114 is arranged on the first transparent substrate 106 and has a plurality of light transmission regions 112a. The light transmission regions 112a are formed in the positions corresponding to the high refractive index regions 108. The liquid crystal layer 110 is formed between the first transparent substrate 106 and the second substrate 114. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a liquid crystal display device, and more particularly to a high-brightness liquid crystal display device.

  In recent years, photoelectric technology has appeared one after another, and the market of liquid crystal display devices has been greatly developed with the advent of the digital age. A liquid crystal display (LCD) has advantages such as high image quality, small size, light weight, low voltage drive, low power consumption, and wide application range, so that it can be used for portable TVs, mobile phones, notebooks. Widely used in consumer electronic products and computer products such as desktop computers and desktop display devices, and gradually replaced cathode ray tubes (CRTs), becoming the mainstream of display devices.

  Since the liquid crystal itself does not emit light, in order to obtain a display effect, a light source must be provided using a backlight module. For this reason, most of the conventional liquid crystal display devices are back-light type liquid crystal display devices having a liquid crystal display panel on the front end side and a backlight module on the rear end side.

Luminance is one of the important items in the design of liquid crystal display devices. Conventionally, the only way to improve the luminance of a liquid crystal display device is to increase the aperture ratio or use a brightness enhancement film in the backlight module. There wasn't. However, when a technique for increasing the aperture ratio and improving the luminance of the liquid crystal display device is used, there is a problem that not only the difficulty of the manufacturing process increases, but also the cost burden increases.
In addition, when a large number of optical films are used in the backlight module to improve the luminance, other problems may occur. For example, in the process of traveling light rays, the light rays are absorbed by the portion of the optical film, the usage rate of the light rays is reduced, and the use of a large number of optical films may increase the cost of materials and assembly.
In addition, the optical film may be damaged due to scratches between the optical films when performing a reliability test, which may increase the cost. When these optical films are not properly arranged, interference fringes are generated, and visual defects may occur due to the moire effect.

In order to improve the above-mentioned drawbacks, a technique is disclosed in which a microlens array is manufactured on the surface of an upper glass substrate in a liquid crystal display panel, and the brightness of the liquid crystal display device is increased by a curved structure of the microlens. (Patent Document 1).
However, this method has the greatest difficulty that it is difficult to control because the microlens is not larger than the microscale and the surface structure is a curved surface. Further, since it is limited by the size and structure of the microlens, the brightness of the liquid crystal display device cannot be enhanced by the curved surface structure of the microlens.

  Therefore, there has been a demand for a technique for reducing the cost burden, suppressing the difficulty of control in the manufacturing process, and improving the luminance of the liquid crystal display device.

US Pat. No. 6,421,105

A first object of the present invention is to provide a liquid crystal display device that reduces light loss generated in a light shielding region and improves the luminance of the liquid crystal display device.
A second object of the present invention is to provide a liquid crystal display device that effectively reduces light leakage in a dark state and increases the contrast of the liquid crystal display device.
It is a third object of the present invention to provide a liquid crystal display device that reduces the number of brightness enhancement films used and reduces the cost burden.

  In order to solve such a technical problem, the invention described in claim 1 is a high-brightness liquid crystal display device including a backlight module, a first transparent substrate, a second substrate, and a liquid crystal layer. The backlight module has a light emitting surface, and the first transparent substrate is disposed on one side of the light emitting surface of the backlight module, and the first transparent substrate is disposed within one surface of the first transparent substrate. A plurality of high refractive index regions are formed on one surface adjacent to the light emitting surface, the refractive index of the high refractive index region is larger than the refractive index of the first transparent substrate, and the second substrate is A plurality of light transmission regions disposed on a single transparent substrate and corresponding to the high refractive index region, wherein the liquid crystal layer is disposed between the first transparent substrate and the second substrate. It is characterized by being formed.

  The invention according to claim 2 is characterized in that a refractive index of the high refractive index region is between 1.45 and 1.80.

  The invention according to claim 3 is characterized in that the thickness of the high refractive index region is between 5 and 300 μm.

  The invention according to claim 4 is characterized in that the thickness of the high refractive index region is between 100 and 200 μm.

  The invention according to claim 5 is characterized in that the high refractive index region is made of a polymer material.

  The invention according to claim 6 is characterized in that the refractive index of the first transparent substrate is between 1.25 and 1.60.

  The invention described in claim 7 further includes a first polarizing plate disposed between the backlight module and the first transparent substrate.

  The invention according to claim 8 is further characterized by further comprising a second polarizing plate disposed on the second substrate.

  The invention according to claim 9 is a high-brightness liquid crystal display device comprising a backlight module, a first transparent substrate, a second substrate, and a liquid crystal layer, wherein the backlight module has a light emitting surface. The first transparent substrate is disposed on one side of the light emitting surface of the backlight module, and has a plurality of low refractive indexes on one surface adjacent to the light emitting surface within one surface of the first transparent substrate. An area is formed, the refractive index of the low refractive index area is smaller than the refractive index of the first transparent substrate, the second substrate is disposed on the first transparent substrate, and the low refractive index A liquid crystal display device, comprising: a plurality of light shielding regions formed at positions corresponding to the regions, wherein the liquid crystal layer is formed between the first transparent substrate and the second substrate.

  The invention according to claim 10 is a high-brightness liquid crystal display device comprising a backlight module, a polymer film layer, and a liquid crystal display panel, wherein the backlight module has a light emitting surface, and the polymer film The layer is disposed on one side of the light emitting surface of the backlight module, and has a plurality of alternately arranged high refractive index regions and a plurality of low refractive index regions, and the liquid crystal display panel It has a plurality of light transmission regions arranged on the molecular film layer and formed above the high refractive index region in the polymer film layer.

  The invention according to claim 11 is characterized in that a refractive index of the high refractive index region is between 1.45 and 1.80.

  The invention according to claim 12 is characterized in that the refractive index of the low refractive index region is between 1.25 and 1.60.

  The invention according to claim 13 is characterized in that the thickness of the polymer film layer is between 5 and 300 μm.

  The invention according to claim 14 is characterized in that the thickness of the polymer film layer is between 100 and 200 μm.

  In the invention described in claim 15, the liquid crystal display panel is disposed on a first polarizing plate, a first transparent substrate disposed on the first polarizing plate, and the first transparent substrate. A second substrate; a liquid crystal layer disposed between the first transparent substrate and the second substrate; and a second polarizing plate disposed on the second substrate. And

  The invention according to claim 16 is a liquid crystal display device comprising a backlight module, a liquid crystal display panel, and a polymer film layer having a plurality of high refractive index regions and a plurality of low refractive index regions, The polymer film layer is disposed between the backlight module and the liquid crystal display panel, and the high refractive index region in the polymer film layer is at a position corresponding to a plurality of light transmission regions of the liquid crystal display panel. The low refractive index region is formed at a position corresponding to a plurality of light shielding regions of the liquid crystal display panel.

  The invention according to claim 17 is characterized in that the high refractive index regions and the low refractive index regions are alternately arranged.

  The invention according to claim 18 is characterized in that a refractive index of the high refractive index region is between 1.45 and 1.80.

  The invention according to claim 19 is characterized in that the refractive index of the low refractive index region is between 1.25 and 1.60.

  The invention according to claim 20 is characterized in that the thickness of the polymer film layer is between 5 and 300 μm.

  The invention according to claim 21 is characterized in that the thickness of the polymer film layer is between 100 and 200 μm.

  According to a twenty-second aspect of the present invention, the condensing layer has a plurality of high refractive index regions and a plurality of low refractive index regions, and each of the high refractive index regions and the low refractive index regions is a plurality in the liquid crystal display device. It is characterized in that it is formed at positions corresponding to the light transmission region and the plurality of light shielding regions.

  The invention according to claim 23 is characterized in that the light condensing layer is a polymer film layer.

  The invention according to claim 24 is characterized in that the high refractive index regions and the low refractive index regions are alternately arranged.

  The invention according to claim 25 is characterized in that the refractive index of the high refractive index region is between 1.45 and 1.80.

  In a twenty-sixth aspect of the present invention, a refractive index of the low refractive index region is between 1.25 and 1.60.

The liquid crystal display device of the present invention can improve the luminance of the liquid crystal display device by concentrating the light field distribution as well as reducing the light loss generated when passing through the light shielding region. Further, when the method of the present invention is used, light leakage in a dark state can be effectively reduced and the contrast of the liquid crystal display device can be increased.
Furthermore, the method of this invention can reduce cost by reducing the usage-amount of the film for brightness improvement. In addition, the method of the present invention refracts light rays passing through the low refractive index region on the interface of media having different refractive indexes, effectively concentrates the light rays in the light transmission region, and further improves the luminance of the liquid crystal display device.

In order that the present invention may be more fully and fully understood, it will now be described in conjunction with the drawings.
Please refer to FIG. FIG. 1 is a cross-sectional view illustrating a liquid crystal display device according to a preferred embodiment of the present invention. As shown in FIG. 1, the liquid crystal display device 100 includes a backlight module 102, a first polarizing plate 104, a first transparent substrate 106, a liquid crystal layer 110, a second substrate 114, and a second polarizing plate 116. .
The backlight module 102 has a light exit surface 101. The first polarizing plate 104 is disposed on one side of the light emitting surface 101 of the backlight module 102. On one surface of the first transparent substrate 106, a plurality of high refractive index regions 108 are formed on one surface adjacent to the first polarizing plate 104. The second substrate 114 is a color filter substrate, and the liquid crystal layer 110 is disposed between the first transparent substrate 106 and the second substrate 114.
The second substrate 114 has a light transmission region 112a and a light shielding region 112b, the high refractive index region 108 is formed at a position corresponding to the light transmission region 112a, and the light transmission region 112a is the same as the high refractive index region 108. It is formed above. The at least three different color lights emitted from the light transmission region 112a include red, green, and blue three-color lights. The surface area of the light transmission region 112 a occupying the second substrate 114 is preferably equal to the surface area of the high refractive index region 108 occupying the first transparent substrate 106.

  The high refractive index region 108 is preferably made of a polymer material. The refractive index of the high refractive index region 108 is larger than the refractive index of the first transparent substrate 106. The refractive index of the high refractive index region 108 is preferably between about 1.45 and 1.80, and the refractive index of the first transparent substrate 106 is preferably between about 1.25 and 1.60. The thickness of the high refractive index region 108 is preferably between 5 and 300 μm, more preferably between 100 and 200 μm, but the present invention is not limited to this.

  Reference is made to FIG. 1A. As shown in FIG. 1A, the light shielding region 112b may be selectively formed at a position corresponding to the low refractive index region 109, but the present invention is not limited to this. The light shielding region 112 b is formed above the low refractive index region 109.

Please refer to FIG. FIG. 2 is a cross-sectional view illustrating a liquid crystal display device according to another embodiment of the present invention. As shown in FIG. 2, the liquid crystal display device 200 includes a backlight module 202, a polymer film layer 208, a first polarizing plate 204, a first transparent substrate 206, a liquid crystal layer 210, a second substrate 214, and a second substrate. The polarizing plate 216 is provided. The backlight module 202 has a light emission surface 201. The second substrate 214 is a color filter substrate, and a liquid crystal layer 210 is disposed between the first transparent substrate 206 and the second substrate 214. The polymer film layer 208 has a high refractive index region 208a and a low refractive index region 208b, and the high refractive index regions 208a and the low refractive index regions 208b are alternately arranged.
The second substrate 214 described above includes a light transmission region 212a and a light shielding region 212b. The high refractive index region 208a is formed at a position corresponding to the light transmission region 212a, and the light transmission region 212a is the polymer film layer 208. It is formed above the middle high refractive index region 208a. The low refractive index region 208b is formed at a position corresponding to the light shielding region 212b, and the light shielding region 212b is disposed above the low refractive index region 208b in the polymer film layer 208. The surface area of the light transmission region 212 a occupying the second substrate 214 is preferably equal to the surface area of the high refractive index region 208 a occupying the polymer film layer 208.

The polymer film layer 208 is preferably made of a polymer material. The thickness of the polymer film layer 208 is preferably between 5 and 300 μm, more preferably between 100 and 200 μm. The refractive index of the high refractive index region 208a is preferably between 1.45 and 1.80, and the refractive index of the low refractive index region 208b is preferably between 1.25 and 1.60.
In another embodiment, the refractive index of the first polarizing plate 204 is preferably larger than the refractive index of the high refractive index region 208a in order to improve the utilization factor of light, but the present invention is limited to this. I don't mean.

  Please refer to FIG. As shown in FIG. 3, in another embodiment of the present invention, a polymer film layer 208 may be formed between the first transparent substrate 206 and the first polarizing plate 204. It is not limited to.

When the incident light passes on the interface of the medium having a different refractive index on the interface of the medium having a different refractive index according to Snell's Law, the light beam of the present embodiment is reflected on the liquid crystal display. Since the light beam is reflected into the light transmission region of the panel, the usage rate of the light beam is improved. Please refer to FIG. 4 and FIG.
4 and 5 are partially enlarged views showing the high refractive index region 108 formed on the first transparent substrate 106 of FIG. As shown in FIG. 4, the refractive index of the high refractive index region 108 is n1, the refractive index of the first transparent substrate 106 is n2, and the contact interface between the high refractive index region 108 and the first transparent substrate 106. Is the contact surface 107, the incident angle is θ1, and the refraction angle is θ2.
The refractive index n1 of the high refractive index region 108 is larger than the refractive index n2 of the first transparent substrate 106. Therefore, when the incident light 103 travels from the high refractive index region (high density medium) 108 to the first transparent substrate 106 (low density medium) according to Snell's law of Expression (1), the refraction angle θ2 becomes the incident angle. It becomes larger than θ1. When the refraction angle θ2 is equal to 90 degrees, the refracted light beam 105 travels on the contact surface 107. At this time, the incident angle θ1 is referred to as a critical angle θC of total reflection. Therefore, the formula (1) of Snell's law can be rewritten as the formula (2).

(Equation 1)
n1 × sin θ1 = n2 × sin θ2 Formula (1)

(Equation 2)
θC = sin−1 (n2 / n1) Formula (2)

  As can be understood from Equation (2), when the incident angle θ1 is larger than the critical angle θC of total reflection, a phenomenon of total reflection occurs, and the light beam 105a is reflected on the contact surface 107 as shown in FIG. The

Please refer to FIG. 1, FIG. 4 and FIG. 5 simultaneously. As shown in FIGS. 1, 4, and 5, the light emitted from the backlight module 102 first enters the first polarizing plate 104. Subsequently, when the incident light 103 enters the high refractive index region 108, the light beam 105 is reflected on the contact surface 107. Thereafter, the light beam 105 travels through the interface between the high refractive index region 108 and the first transparent substrate 106, and passes through the liquid crystal layer 110 and the light transmitting region 112 a in the second substrate 114, the second substrate 114, and the second substrate 114. The polarizing plate 116 is sequentially advanced.
This state is the same as the state of the totally reflected critical angle θC. When the incident light 103a is totally reflected, the totally reflected light beam 105a passes through the light transmission region 112a of the second substrate 114, so that the luminance of the liquid crystal display device is improved.

  More specifically, the light beam of the present embodiment is reflected on the liquid crystal display panel by the reflection phenomenon when incident light passes on the interface of the medium having different refractive indexes on the interface of the medium having different refractive indexes according to Snell's law. Since the light rays are reflected into the light transmission region 112a, the light loss through the light shielding region 112b of the second substrate 114 is reduced. For this reason, the light usage rate is improved and the luminance of the liquid crystal display device is improved.

  Further, in the method of the present invention, the incident light 103b is transmitted to the first transparent substrate 106 having a low refractive index, and the interfaces of the media having different refractive indexes (for example, the high refractive index region 108 and the first transparent substrate 106 The luminance of the liquid crystal display device may be further improved by generating a refraction effect on the interface) and effectively concentrating the light beam 105b on the light transmission region 112a of the second substrate 114.

  Hereinafter, although the manufacturing method of a high refractive index area | region is demonstrated in detail by suitable embodiment of this invention, the manufacturing method of this invention is not necessarily limited only to this.

(First manufacturing method)
Please refer to FIG. 6A to FIG. 6E. 6A to 6E are cross-sectional views showing a manufacturing process for forming a high refractive index region on a transparent substrate by the first manufacturing method of the present invention. As shown in FIG. 6A, a transparent substrate 402 is prepared, and a resist layer 404 is formed on the transparent substrate 402.
Subsequently, as illustrated in FIG. 6B, a photolithography process is performed on the resist layer 404 to form a patterned resist layer 406. Further, as shown in FIG. 6C, the transparent substrate 402 not covered with the patterned resist layer 406 is etched to form a recess 408 on the transparent substrate 402. The recess 408 is formed at a position corresponding to a light transmission region (not shown) of the second substrate. Thereafter, the patterned resist layer 406 is removed.

Next, as shown in FIG. 6D, a polymer material 410 is formed on the inside of the recess 408 and on the transparent substrate 402 by spin coating. The refractive index of the polymer material 410 is larger than the refractive index of the transparent substrate 402.
Subsequently, the polymer material 410 is irradiated with ultraviolet rays to cure the polymer material 410. Subsequently, as shown in FIG. 6E, an etching process and a polishing process are performed to flatten the surface of the transparent substrate 402 and to form a plurality of high refractive index regions 412. Thereby, the high refractive index region 412 is formed on the transparent substrate.

  Alternatively, a plurality of low refractive index regions may be formed on the transparent substrate as necessary, but the present invention is not limited to this. The low refractive index region is formed at a position corresponding to the light shielding region of the second substrate.

(Second manufacturing method)
Please refer to FIG. 7A to FIG. 7D. 7A to 7D are cross-sectional views showing a manufacturing process for forming a high refractive index region on a transparent substrate by the second manufacturing method of the present invention. As shown in FIG. 7A, after a resist layer (not shown) is formed on the transparent substrate 502, a photoresist process is performed on the resist layer to form a patterned resist layer 504.
As shown in FIG. 7B, the transparent substrate 502 not covered with the patterned resist layer 504 is etched to form a recess 506 on the transparent substrate 502. The recess 506 is formed at a position corresponding to a light transmission region (not shown) of the second substrate. Thereafter, the patterned resist layer 504 is removed.

  As shown in FIG. 7C, a single adhesive layer 510 is applied on the polarizing plate 508. The adhesive layer 510 is preferably made of a polymer material. The thickness of the adhesive layer 510 is preferably between 5 and 300 μm, more preferably between 100 and 200 μm. In addition, the refractive index of the adhesive layer 510 is larger than the refractive index of the transparent substrate 502. Thereafter, as illustrated in FIG. 7D, the polarizing plate 508 and the transparent substrate 502 are bonded via the adhesive layer 510. As a result, a high refractive index region 512 is formed on the transparent substrate.

  Alternatively, a plurality of low refractive index regions may be formed on the transparent substrate as necessary, but the present invention is not limited to this. The low refractive index region may be formed at a position corresponding to the light shielding region of the second substrate.

(Third production method)
Please refer to FIG. 8A to FIG. 8D. 8A to 8D are cross-sectional views showing a manufacturing process for forming a polymer film layer on a transparent substrate by the third manufacturing method of the present invention. As shown in FIG. 8A, a transparent substrate 602 is first prepared. Subsequently, as shown in FIG. 8B, a polymer film layer 604 is formed on the transparent substrate 602. In the method of forming the polymer film layer 604 described above, it is preferable to use a spin coating method, but the present invention is not limited to this.

Subsequently, as shown in FIG. 8C, the polymer film layer 604 is exposed using a photomask 606 and ultraviolet rays 608, and a high refractive index region 604a and a low refractive index region 604b as shown in FIG. 8D are formed. Form. The polymer film layer 604 controls the exposure time and the exposure intensity, and obtains a high refractive index region 604a and a low refractive index region 604b having different refractive indexes.
Thereby, a high refractive index region and a low refractive index region are formed on the transparent substrate. Alternatively, a polymer film layer may be formed on a polarizing plate, and a high refractive index region and a low refractive index region may be formed on the polarizing plate, but the present invention is not limited to this.

  While the preferred embodiments of the present invention have been disclosed above, as may be appreciated by those skilled in the art, they are not intended to limit the invention in any way. Various changes and modifications can be made without departing from the spirit and scope of the present invention. Accordingly, the scope of the claims of the present invention should be construed broadly including such changes and modifications.

1 is a cross-sectional view illustrating a liquid crystal display device according to a preferred embodiment of the present invention. 1 is a cross-sectional view illustrating a liquid crystal display device according to a preferred embodiment of the present invention. FIG. 5 is a cross-sectional view showing a liquid crystal display device according to another embodiment of the present invention. FIG. 6 is a cross-sectional view showing a liquid crystal display device according to still another embodiment of the present invention. It is the elements on larger scale which show the 1st transparent substrate of FIG. It is the elements on larger scale which show the 1st transparent substrate of FIG. It is sectional drawing which shows the manufacturing process which forms a high refractive index area | region on a transparent substrate with the 1st manufacturing method of this invention. It is sectional drawing which shows the manufacturing process which forms a high refractive index area | region on a transparent substrate with the 1st manufacturing method of this invention. It is sectional drawing which shows the manufacturing process which forms a high refractive index area | region on a transparent substrate with the 1st manufacturing method of this invention. It is sectional drawing which shows the manufacturing process which forms a high refractive index area | region on a transparent substrate with the 1st manufacturing method of this invention. It is sectional drawing which shows the manufacturing process which forms a high refractive index area | region on a transparent substrate with the 1st manufacturing method of this invention. It is sectional drawing which shows the manufacturing process which forms a high refractive index area | region on a transparent substrate with the 2nd manufacturing method of this invention. It is sectional drawing which shows the manufacturing process which forms a high refractive index area | region on a transparent substrate with the 2nd manufacturing method of this invention. It is sectional drawing which shows the manufacturing process which forms a high refractive index area | region on a transparent substrate with the 2nd manufacturing method of this invention. It is sectional drawing which shows the manufacturing process which forms a high refractive index area | region on a transparent substrate with the 2nd manufacturing method of this invention. It is sectional drawing which shows the manufacturing process which forms a polymer film layer on a transparent substrate with the 3rd manufacturing method of this invention. It is sectional drawing which shows the manufacturing process which forms a polymer film layer on a transparent substrate with the 3rd manufacturing method of this invention. It is sectional drawing which shows the manufacturing process which forms a polymer film layer on a transparent substrate with the 3rd manufacturing method of this invention. It is sectional drawing which shows the manufacturing process which forms a polymer film layer on a transparent substrate with the 3rd manufacturing method of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Liquid crystal display device 101 Light emission surface 102 Backlight module 103 Incident light 103a Incident light 103b Incident light 104 1st polarizing plate 105 Light beam 105a Light beam 105b Light beam 106 1st transparent substrate 107 Contact surface 108 High refractive index area | region 109 Low refraction Rate region 110 Liquid crystal layer 112a Light transmission region 112b Light shielding region 114 Second substrate 116 Second polarizing plate 200 Liquid crystal display device 201 Light exit surface 202 Backlight module 204 First polarizing plate 206 First transparent substrate 208 Polymer Film layer 208a High refractive index region 208b Low refractive index region 210 Liquid crystal layer 212a Light transmission region 212b Light blocking region 214 Second substrate 216 Second polarizing plate 402 Transparent substrate 404 Resist layer 406 Patterned resist layer 408 Recess 410 Polymer Material 412 High Refractive Index Region 502 Transparent substrate 504 Patterned resist layer 506 Recess 508 Polarizing plate 510 Adhesive layer 512 High refractive index region 602 Transparent substrate 604 Polymer film layer 604a High refractive index region 604b Low refractive index region 606 Photomask 608 Ultraviolet ray n1 Refractive index n2 Refractive Rate θ1 Incident angle θ2 Refraction angle

Claims (26)

A high-brightness liquid crystal display device comprising a backlight module, a first transparent substrate, a second substrate, and a liquid crystal layer,
The backlight module has a light emitting surface, and the first transparent substrate is disposed on one side of the light emitting surface of the backlight module, and the light is within one surface of the first transparent substrate. A plurality of high refractive index regions are formed on one surface adjacent to the emission surface, and the refractive index of the high refractive index region is larger than the refractive index of the first transparent substrate,
The second substrate is disposed on the first transparent substrate, and has a plurality of light transmission regions formed at positions corresponding to the high refractive index regions,
The liquid crystal display device, wherein the liquid crystal layer is formed between the first transparent substrate and the second substrate.   The liquid crystal display device according to claim 1, wherein a refractive index of the high refractive index region is between 1.45 and 1.80.   2. The liquid crystal display device according to claim 1, wherein the thickness of the high refractive index region is between 5 and 300 [mu] m.   4. The liquid crystal display device according to claim 3, wherein the thickness of the high refractive index region is between 100 and 200 [mu] m.   The liquid crystal display device according to claim 1, wherein the high refractive index region is made of a polymer material.   The liquid crystal display device according to claim 1, wherein a refractive index of the first transparent substrate is between 1.25 and 1.60.   The liquid crystal display device according to claim 1, further comprising a first polarizing plate disposed between the backlight module and the first transparent substrate.   The liquid crystal display device according to claim 1, further comprising a second polarizing plate disposed on the second substrate. A high-brightness liquid crystal display device comprising a backlight module, a first transparent substrate, a second substrate, and a liquid crystal layer,
The backlight module has a light exit surface,
The first transparent substrate is disposed on one side of the light emitting surface of the backlight module, and a plurality of low refractive index regions are formed on one surface adjacent to the light emitting surface within one surface of the first transparent substrate. The refractive index of the low refractive index region is smaller than the refractive index of the first transparent substrate,
The second substrate is disposed on the first transparent substrate and has a plurality of light shielding regions formed at positions corresponding to the low refractive index regions,
The liquid crystal display device, wherein the liquid crystal layer is formed between the first transparent substrate and the second substrate. A high-brightness liquid crystal display device comprising a backlight module, a polymer film layer, and a liquid crystal display panel,
The backlight module has a light exit surface,
The polymer film layer is disposed on one side of the light exit surface of the backlight module, and has a plurality of alternately arranged high refractive index regions and a plurality of low refractive index regions,
The liquid crystal display panel has a plurality of light transmission regions disposed on the polymer film layer and formed above the high refractive index region in the polymer film layer. Display device.   The liquid crystal display device according to claim 10, wherein a refractive index of the high refractive index region is between 1.45 and 1.80.   The liquid crystal display device according to claim 10, wherein a refractive index of the low refractive index region is between 1.25 and 1.60.   The liquid crystal display device according to claim 10, wherein the polymer film layer has a thickness of 5 to 300 μm.   14. The liquid crystal display device according to claim 13, wherein the polymer film layer has a thickness of 100 to 200 [mu] m. The liquid crystal display panel is
A first polarizing plate; a first transparent substrate disposed on the first polarizing plate; a second substrate disposed on the first transparent substrate; the first transparent substrate; The liquid crystal display device according to claim 10, comprising: a liquid crystal layer disposed between the second substrates; and a second polarizing plate disposed on the second substrate. A liquid crystal display device comprising a backlight module, a liquid crystal display panel, and a polymer film layer having a plurality of high refractive index regions and a plurality of low refractive index regions,
The polymer film layer is disposed between the backlight module and the liquid crystal display panel,
The high refractive index region in the polymer film layer is formed at a position corresponding to a plurality of light transmission regions of the liquid crystal display panel,
The liquid crystal display device, wherein the low refractive index region is formed at a position corresponding to a plurality of light shielding regions of the liquid crystal display panel.   The liquid crystal display device according to claim 16, wherein the high refractive index regions and the low refractive index regions are alternately arranged.   The liquid crystal display device according to claim 16, wherein a refractive index of the high refractive index region is between 1.45 and 1.80.   The liquid crystal display device according to claim 16, wherein a refractive index of the low refractive index region is between 1.25 and 1.60.   The liquid crystal display device of claim 16, wherein the polymer film layer has a thickness of 5 to 300 µm.   21. The liquid crystal display device according to claim 20, wherein the polymer film layer has a thickness of 100 to 200 [mu] m. The light collecting layer has a plurality of high refractive index regions and a plurality of low refractive index regions,
The high refractive index region and the low refractive index region are formed at positions corresponding to a plurality of light transmission regions and a plurality of light shielding regions in the liquid crystal display device, respectively. layer.   The condensing layer according to claim 22, wherein the condensing layer is a polymer film layer.   The condensing layer according to claim 22, wherein the high refractive index regions and the low refractive index regions are alternately arranged.   The condensing layer according to claim 22, wherein the refractive index of the high refractive index region is between 1.45 and 1.80.   The condensing layer according to claim 22, wherein a refractive index of the low refractive index region is between 1.25 and 1.60.

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