KR100897738B1 - Back light assembly for emitting the light both sides and liquid crystal display device using the same - Google Patents

Abstract

A bidirectional light exit backlight assembly and a liquid crystal display using the same are disclosed. In the process of supplying the light to the first display area and the second display area for separating the light, the luminance ratio of the light supplied to the first display area and the second display area can be adjusted to display different images in two different directions. Allows you to display the same image in two different directions.

Backlight Assembly, Bidirectional, Display

Description

BACK LIGHT ASSEMBLY FOR EMITTING THE LIGHT BOTH SIDES AND LIQUID CRYSTAL DISPLAY DEVICE USING THE SAME}

1 is a conceptual diagram of a bidirectional light exit backlight assembly according to a first embodiment of the present invention.

2 is a conceptual diagram illustrating a light reflection pattern formed on the light guide plate of the bidirectional light exit backlight assembly according to the first embodiment of the present invention.

3 is a plan view illustrating the size and arrangement of the light reflection pattern of FIG. 2.

4 is a conceptual diagram of a bidirectional light exit backlight assembly according to a second embodiment of the present invention.

5 is a graph showing luminance in the first display area and the second display area according to the second embodiment of the present invention.

6 is a conceptual diagram of a bidirectional light exit backlight assembly according to a third embodiment of the present invention.

7 is a conceptual diagram of a bidirectional light exit backlight assembly according to a fourth embodiment of the present invention.

FIG. 8 is a conceptual diagram illustrating a light reflection pattern formed on the light guide plate of FIG. 7.                 

9 is a conceptual diagram illustrating an optical sheet installed in the bidirectional light exit backlight assembly of FIG. 8.

10 is a conceptual diagram of a bidirectional light exit backlight assembly according to a fifth embodiment of the present invention.

FIG. 11 is a graph illustrating distance-specific sizes of the light reflection patterns of FIG. 10.

FIG. 12 is a graph comparing distance-specific sizes of the first light reflecting pad and the second light reflecting pad of FIG. 10.

13 is a conceptual diagram of a bidirectional light exit backlight assembly according to a sixth embodiment of the present invention.

14 is a conceptual view illustrating that optical sheets are installed in the bidirectional light exit backlight assembly of FIG. 13.

15 is a conceptual diagram of a backlight assembly according to a seventh embodiment of the present invention.

FIG. 16 is a graph illustrating distance-specific sizes of the light reflection patterns of FIG. 15.

FIG. 17 is a graph comparing distance-specific sizes of the first light reflecting pad and the second light reflecting pad of FIG. 15.

18 is a conceptual diagram of a backlight assembly according to an eighth embodiment of the present invention.

19 is a conceptual diagram of a liquid crystal display according to a ninth embodiment of the present invention.

20 to 23 are conceptual views illustrating the size and positional relationship of liquid crystal display panel assemblies included in the liquid crystal display shown in FIG. 19.

24 or 25 are conceptual views illustrating a driving method of the liquid crystal display panel assembly included in the liquid crystal display shown in FIG. 19.

26 is a conceptual diagram of a liquid crystal display according to a second embodiment of the present invention.

FIG. 27 is a conceptual diagram illustrating the size and positional relationship of liquid crystal display panels of a liquid crystal display according to a second exemplary embodiment of the present invention.

The present invention relates to a bi-directional light emitting backlight assembly, and a liquid crystal display device using the same. In particular, the light quantity generated from the light source is divided into two desired directions by dividing the light quantity in a desired ratio and providing information in two different directions. The present invention relates to a bidirectional light exit backlight assembly and a liquid crystal display using the same.

In general, a conventional liquid crystal display device may be defined as a device for performing a display using a liquid crystal whose light transmittance is changed according to the intensity of an electric field. Such a liquid crystal display device has an advantage that it can be implemented as a flat panel type display device having a thickness of several tens of mm including a liquid crystal layer of only a few μm.

The liquid crystal display device having such an advantage is widely used as a communication device such as a mobile phone and a display device of a portable computer or a desktop computer.

Such a conventional liquid crystal display device is generally only interested in reducing the thickness and volume of the display and the liquid crystal display device to display the image in only one direction.                         

In recent years, efforts have been made to develop and display technologies for displaying the same image or different images in both directions, instead of displaying the image in only one direction.

Conventional liquid crystal displays for displaying images in both directions have a liquid crystal display symmetrically on two light propagation paths separated by a light reflecting / transmitting member that separates light in both directions desired to display, and a light reflecting / transmitting member. A polarizing filter, a pixel electrode, a liquid crystal, a counter electrode, a glass substrate, a color filter, and a liquid crystal display panel provided with a polarizing plate are included as components.

In addition, another conventional liquid crystal display for displaying images in both directions has a component including a flat light emitting portion for generating light on the front surface and a back surface opposite to the surface, and a display cell formed on the front surface and the back surface of the flat light emitting portion.

In addition, another conventional liquid crystal display for displaying images in both directions has a backlight assembly, a first liquid crystal display panel and a second liquid crystal display panel provided on both sides of the backlight assembly as components.

As described above, the conventional liquid crystal display devices displaying images in both directions separate the light in the direction in which the light is to be displayed and perform the display in both directions.

However, these conventional liquid crystal display devices all have a problem in that they can only separate light and have no function of intentionally adjusting the amount of light to be separated.                         

As described above, the problem caused by the conventional liquid crystal display devices not being able to intentionally adjust the amount of light will be described as a mobile phone which is the most representative device requiring display in both directions.

For example, the cellular phone of model A is required to supply only 20% of the light from the 100% of light emitted from the light source to the external display, and supply the remaining 80% of light to the internal display. On the contrary, the mobile phone of model B is required to supply 80% of the 100% of the light generated from the light source to the external display, and supply the remaining 20% of the light to the internal display.

That is, when the display brightness of the external display device is set lower than the display brightness of the internal display device in model A mobile phones, and the display brightness of the external display device is set higher than the display brightness of the internal display device in model B mobile phones. to be.

However, the above-described conventional liquid crystal display devices capable of bidirectional display are only a degree of separation of light, and it is impossible to manufacture a mobile phone having both of the functions of the two models described above by the prior art.

As a result, in order to satisfy the rapidly changing consumer demands as in the above-described example, it is required to develop a technology capable of separating the light in both directions and separating the light in the same amount of light or in different light amounts.

Accordingly, the present invention is in response to the demand for the development of the technology, and a first object of the present invention is to provide a bidirectional light emitting backlight assembly that separates light to artificially have different luminance and supplies the light to the first display area and the second display area. In providing.

In addition, a second object of the present invention is to provide a liquid crystal display device which displays the same or different images in two different directions by separating light so as to artificially have different luminance and supplying the light to the first display area and the second display area. Is in.

The bidirectional light emitting backlight assembly according to the exemplary embodiment for implementing the first object of the present invention is disposed between the first display area and the second display area, and is provided between the first display area and the second display area. The light incident side for changing the first light into the second light, the first light exit surface for emitting the third light which is a part of the second light to the first display area, and the fourth light remaining as the second light is the second display area. The light guide plate having the second light exit surface and the fourth light to reflect the light toward the first display area in the direction toward the first display area and the remainder of the fourth light to the second display area to transmit the first luminance in the first display area. And a light reflecting / transmitting member for adjusting the second luminance in the second display area to have a specified luminance ratio.
In another embodiment, the bidirectional light emitting backlight assembly for implementing the first object of the present invention is disposed between the first display area and the second display area, and supplies the first light between the first display area and the second display area. Include the lamp assembly further.
The light guide plate has a first light incident side for changing the first light to a part of the second light, a first surface for reflecting the third light, which is part of the second light passing through the first light incident side, to the first display area, the first A first light guide plate having a second surface facing the surface and having a second surface for emitting the third light, a second light incident side for changing the first light to the remaining second light, and a part of the second light passing through the second light incident side And a second light guide plate having a third surface for reflecting light to the second display area and a third surface for facing the third surface and having a fourth surface for emitting the seventh light. The light reflecting / transmitting member is interposed between the first and third surfaces separately from the first and second surfaces, reflecting a portion of the fourth light leaked from the first surface to the first display area and the second to the second surface. And a light reflection / transmitting member that transmits to the display area, reflects a part of the eighth light leaked from the third surface to the second display area, and transmits the remaining light to the first display area.
In addition, the liquid crystal display according to the exemplary embodiment for implementing the second object of the present invention is disposed between the first display area and the second display area, and supplies the first light between the first display area and the second display area. A lamp assembly, a light incidence side surface for changing the first light to a second light, a first light exit surface for emitting a third light which is a part of the second light to the first display area, and a fourth light that is the remainder of the second light A light guide plate having a second light exit surface for exiting the second display area, reflecting a portion of the fourth light in a direction toward the first area and transmitting the remainder of the fourth light to the second display area to A first for changing a part of the light reflection / transmission member, the third light and the fourth light to adjust the first brightness and the second brightness in the second display area to have a specified brightness ratio, to the first display light including information And a second liquid crystal panel assembly for converting the rest of the fourth light into a second display light containing information.
Also, in another embodiment, a liquid crystal display device for implementing the second object of the present invention is disposed between the first display area and the second display area, and supplies first light between the first display area and the second display area. It further comprises a lamp assembly.
The light guide plate is configured to reflect the first light incident side surface to change the first light into a part of the second light, and to reflect the third light, which is part of the second light, to the first display area and transmit the remaining fourth light toward the second display area. A first light guide plate having a first surface, a first surface facing the first surface and having a second surface for emitting the third light, a second light incident side for changing the first light to the remaining second light, and a second light incident side. The seventh light, which is a part of the second light passing through, is reflected to the second display area, and the remaining eighth light is opposed to the third and third surfaces for transmitting toward the first display area, and the fourth for emitting the seventh light. And a second light guide plate having a face.
The light reflecting / transmitting member is interposed between the first and third surfaces separately from the first and third surfaces, and reflects a part of the fourth light leaked from the first surface to the first display area and the second to the second surface. And a light reflection / transmitting member that transmits to the display area, reflects a part of the eighth light leaked from the third surface to the second display area, and transmits the remaining light to the first display area.
In this case, the first liquid crystal display panel assembly generates a first display light including information as a third light and the fourth light, and the second liquid crystal display panel assembly includes information as a seventh light and an eighth light. To generate a second display light.
The present invention divides light generated from a light source into a first display area and a second display area in a light guide plate, and reflects and transmits a part of the light supplied to the second display area in the first display area and the second display area. The brightness ratio can be adjusted so that the desired image can be displayed in different directions.

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Hereinafter, a unique operation and effects of the bidirectional light exiting backlight assembly and the liquid crystal display using the same according to preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a conceptual diagram of a bidirectional light exit backlight assembly according to a first embodiment of the present invention.
Referring to FIG. 1, a bidirectional light exit backlight assembly 500a capable of supplying a desired amount of light to a first display area indicated by reference numeral 100 and a second display area indicated by reference numeral 200 according to an embodiment of the present invention. Is shown.

The bidirectional light exit backlight assembly 500 is again composed of the light guide plate 300 and the light reflecting / transmitting member 400.

The light guide plate 300a used in the present invention has a rectangular parallelepiped shape in one embodiment and is positioned between the first display area 100 and the second display area 200.

The light guide plate 300a disposed between the first display area 100 and the second display area 200 includes four side surfaces including a light incident side surface 310, a first light exit surface 320, and a second light exit surface. Face 330.

More specifically, the first light exit surface 320 has a rectangular shape. Thus, the first light exit surface 320 has all four edges. Four side surfaces of the first light exit surface 320 are formed at four angles, for example, perpendicular to the first light exit surface 320. The light incident side 310 is any one of these four sides.

On the other hand, the second light exit surface 330 is connected to the edge of the four side walls to face the first light exit surface 320.

The first light 305 is supplied to the light incident side surface 310 of the light guide plate 300a having the above configuration. The first light 305 is external light generated outside the light guide plate 300. The first light 305 is generated by a light emitting diode as a point light source or a cold cathode ray tube type lamp as a line light source. Hereinafter, reference numeral 301 is given to a light source that generates the first light 305.

As described above, the first light 305 generated in the light emitting diode or the cold cathode ray tube lamp is changed into the second light 315 while passing through the light incident side surface 310 having a different medium from air. The second light 315 proceeds while reflecting inside the light guide plate 300a according to the law of refraction, and finally exits from the light guide plate 300a in two directions.

In this case, any one of the directions emitted from the inside of the light guide plate 300a to the outside is a direction from the first light exit surface 320 toward the first display area 100. Among the second lights 315, light emitted from the first light exit surface 320 toward the first display area 100 will be referred to as a third light 325.

Meanwhile, the rest of the directions emitted from the inside of the light guide plate 300a to the outside is a direction from the second light exit surface 330 toward the second display area 200. Defining the remaining light excluding the third light 325 emitted through the first light exit surface 320 from the second light 315 as the fourth light 335 by distinguishing it from the third light 325 described above. Shall be.

Therefore, it is possible to sufficiently supply light to the first display region 100 and the second display region 200 only with the light guide plate 300a.

However, as described above, it is very difficult to change the first luminance in the first display region 100 and the second luminance in the second display region 200 with the light guide plate 300a alone. In order to change the luminance in the first display area 100 and the second display area 200 with only the light guide plate 300a, the light guide plate 300a needs to be designed and manufactured again.

In the present invention, the light reflection / transmitting member 400 is used to adjust the luminance in the first display area 100 and the second display area 200 as set. The light reflection / transmitting member 400 causes the portion of the fourth light 335 described above to be reflected back to the first display area 100, and the rest of the fourth light 335 is directed to the second display area 200. Allow permeation.

In one embodiment, the light reflection / transmissive member 400 may be manufactured in the form of a thinner sheet or a plate having a thickness thinner than a foamed polyethylene terephthalate resin (PET) material.

The light reflecting / transmitting member 400 may be manufactured to reflect, for example, 80% of the fourth light 335 and transmit 20% by adjusting the foaming process or thickness thereof, or in another embodiment, the fourth light 335 It can be made to reflect 20% of) and transmit 80%.

In the present invention, a polyethylene terephthalate resin (PET) material is used by foaming as a preferred embodiment, but in addition to this, a part of the light may be made of another material that transmits the reflection rest.
FIG. 2 is a conceptual diagram illustrating a light reflection pattern formed on the light guide plate 300a of FIG. 1, and is a conceptual diagram of a backlight assembly 500b according to another example. 3 is a plan view illustrating the size and arrangement of the light reflection pattern of FIG. 2.

2 or 3, light reflecting pads 331 formed on the second light exit surface 330 of the light guide plate 300 having the light reflection / transmitting member 400 are shown. The light reflection pad 331 serves to reflect a part of the second light 315 that reaches the second light exit surface 330 toward the first light exit surface 320.

At least one, preferably a plurality, of the light reflection pads 331 which play such a role are formed on the second light exit surface 330 in a matrix form. The light reflection pads 331 may be implemented by forming a paste in which a material having excellent light reflectance is mixed on the second light exit surface 330 in a silk screen manner.

At this time, the light reflection pads 331 formed on the second light exit surface 330 have a predetermined rule and their shape is changed. Specifically, as shown in FIG. 3, the light reflecting pads 331 are arranged in a matrix shape on the light incident side surface 310, and the closer to the light incident side surface 310, the smaller the planar area thereof is, and the light incident side surface 310 is formed. The farther away from), the larger the planar area becomes.

The change of the planar area of the light reflection pad 331 is to make the amount of light reflection by the light reflection pad 331 constant over the entire area of the second light exit surface 330.

Meanwhile, referring to FIG. 2, the light guide plate 300a described above has the same distance between the first light exit surface 320 and the second light exit surface 330. That is, the first light exit surface 320 and the second light exit surface 330 have a parallel relationship with each other.
4 is a conceptual diagram of a bidirectional light exit backlight assembly 500c according to a second embodiment of the present invention. 5 is a graph showing luminance in the first display area and the second display area according to the second embodiment of the present invention. 6 is a conceptual diagram of a bidirectional light exit backlight assembly 500a according to a third embodiment of the present invention.
Referring to FIG. 4, the first light emitting surface 320 and the second light emitting surface 332 of the light guide plate 300b are not parallel to each other unlike the embodiment of FIG. 2. More specifically, the thickness formed by the first light exit surface 320 and the second light exit surface 332 is the thickest at the light incident side surface 310 and becomes thinner as it moves away from the light incident side surface 310.

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5 is a graph comparing luminance in the first display area 100 and the second display area 200 of the bidirectional light exit backlight assembly 500c according to an embodiment of the present invention.
Referring to FIG. 5, it can be seen that, in an embodiment, the first luminance in the first display area 100 is higher than the second luminance in the second display area 200. Such a graph may be implemented by adjusting the reflectance and the transmittance of the fourth light 335 in the luminance adjusting member 400.

Referring to the graph of FIG. 5, it can be seen that, in an embodiment, the first luminance in the first display area 100 is higher than the second luminance in the second display area 200. Such a graph may be implemented by adjusting the reflectance and transmittance of the fourth light 335 in the light reflection / transmitting member 400.

On the contrary, the first luminance in the first display region 100 may be set equal to or higher than the luminance in the second display region 200. This case can also be implemented by adjusting the reflectance and transmittance of the fourth light 335 in the light reflection / transmission member 400.

Meanwhile, as shown in FIG. 6, in order to further improve optical characteristics of the bidirectional light exiting light guide plate 300a of the backlight assembly 500a, the top surface of the first light exiting surface 320 of the bidirectional light exiting light guide plate 300a is further improved. The optical sheet 340 may be further installed.

As described above, the optical sheets 340 for improving the optical characteristics of the bidirectional light exiting light guide plate 300a further include a diffusion sheet 342 and a prism sheet 344.

More specifically, the diffusion sheet 324 scatters a portion of the fourth light 355 from the third light 325 and the light reflecting / transmitting member 400 to have a more uniform luminance distribution.

At least one prism sheet 344 is installed on the top surface of the diffusion sheet 342 in one embodiment, and serves to improve the viewing angle by correcting the direction of light emitted from the diffusion sheet 342. In detail, the prism sheet 433 is formed on the surface of the prism sheet body 344a having the plate shape and the surface of the prism sheet body 344a facing the first light exit surface 320, thereby improving luminance. It consists of a part 344b. In one embodiment, a plurality of brightness enhancement units 344b are continuously formed in the prism sheet body 355a. In addition, the brightness enhancing portion 344b protrudes from the prism sheet body 355a so that the cross section has a triangular shape.
7 is a conceptual diagram of a bidirectional light exit backlight assembly 1000a according to a fourth embodiment of the present invention. Unlike the embodiment of FIG. 1, the embodiment of FIG. 7 has an advantage of further enhancing the luminance in the first display area 100 and the second display area 200 without using the brightness adjusting member.

Meanwhile, FIG. 7 shows a bidirectional light exit backlight assembly 1000 according to another embodiment of the present invention. Unlike the embodiment of FIG. 1, the embodiment of FIG. 7 has an advantage of further enhancing luminance in the first display area 100 and the second display area 200 without using the light reflection / transmitting member.

Referring to FIG. 7, the bidirectional light exit backlight assembly 1000 may be configured of a first LGP 700, a second LGP 800, a lamp assembly 940, and a light reflection / transmitting member 900.

Among them, the lamp assembly 940 is composed of a light source 950 and a reflector 930 again.

More specifically, the light source 950 may be a light emitting diode that is a point light source or a cold cathode ray tube lamp that is a linear light source. Light incident to the first LGP 700a among light generated by the light source 950 is defined as a first light 952 for convenience of description, and light incident to the second LGP 800a is a fifth light for convenience of description. Light 956 will be defined.

The reflector 930 changes the light generated radially from the light source 950 to have the directions of the first light 952 and the fifth light 956. In order to implement this, the lamp reflector 930 is manufactured by bending a plate having a thin thickness and a high light reflectance on a surface facing the light source 950. More specifically, the reflector 930 consists of two sides 932, 934 facing the plates and a connecting side 936 connecting the two sides 932, 934. In this case, the first LGP 700a and the second LGP 800a are fitted to the two side surfaces 932 and 934.

Meanwhile, the first LGP 700a is disposed between the first display area 100 and the second display area 200 again. The first LGP 700a may further include a plurality of side surfaces including the first light incident side surface 710, a first surface 720, and a second surface 730.

In a preferred embodiment, the first LGP 700a has a rectangular parallelepiped plate shape. Thus, the first surface 720 is a surface having a rectangular shape and has four edges. Four sides are connected to the four edges formed on the first surface 720. In this case, the first light 952 defined above is incident on any one of the four side surfaces. Hereinafter, the side from which the first light 952 is incident will be specifically defined as a first light incident side 710. The second face 730 faces the first face 720 and is connected to all four sidewall edges defined above, and has a rectangular shape having the same shape as the first face 720.

Referring to the operation of the first light guide plate 700a having such a configuration is as follows.

First, the first light incident side surface 710 allows the first light 952 generated from the lamp 950 to enter the inside of the first LGP 700 through air. Among the first lights 952, the first light 952 incident to the inside of the first LGP 700a will be referred to as a second light 953.

The first surface 720 reflects a portion of the second light 953 which satisfies the reflection condition toward the first display area 100 according to the law of refraction. At this time, a portion of the second light 953 that does not satisfy the reflection condition according to the law of refraction leaks toward the second display area 200.

Hereinafter, as illustrated in FIG. 7, the second light 953 reflected toward the first display area 100 is defined as a third light 954, and the second light leaked toward the second display area 200. Light 953 will be defined as a fourth light 955.

On the other hand, the second LGP 800a may be disposed between the first display region 100 and the second display region 200 and at a position adjacent to the first surface 720 of the first LGP 700a. It is arranged in parallel form.

The second LGP 800a having such an arrangement is composed of a plurality of side surfaces including the second light incident side surface 810, a third surface 820, and a fourth surface 830.

In a preferred embodiment, the second light guide plate 800a has a rectangular parallelepiped plate shape. In detail, the third surface 820 is a rectangular parallelepiped surface, and four side surfaces thereof are connected to the edge of the third surface 820. In this case, one of the four side surfaces is the second light incident side surface 810 to which the fifth light 956 described above is incident. The fourth side 830 faces the third side 820 and is connected to all four sidewall edges and has the same shape as the third side 820.

Referring to the operation of the second light guide plate 800a having such a configuration is as follows.

First, the second light incident side surface 810 allows the fifth light 956 generated from the light source 950 to enter the inside of the second LGP 800a through air. The fifth light 956 incident to the inside of the second light guide plate 800a among the fifth lights 956 will be defined as a sixth light 957. The third surface 820 again reflects a portion of the sixth light 957 in which the reflection condition is satisfied according to the law of refraction toward the second display area 200. Meanwhile, the remaining light that does not satisfy the reflection condition according to the law of refraction in the sixth light 957 leaks toward the second display area 200.

Hereinafter, a part of the sixth light 957 reflected toward the second display area 200 will be defined as a seventh light 958, and the sixth light 957 leaked toward the first display area 100 will be described. The remainder will be defined as an eighth light 959.

The light reflecting / transmitting member 900 is provided between the first LGP 700 and the second LGP 800 having such a configuration. The light reflecting / transmitting member 900 reflects a part of the fourth light 955 leaked from the first surface 720 of the first light guide plate 700 back to the first display area 100 and the remaining fourth light. 955 is transmitted through the second display area 200. In addition, the light reflecting / transmitting member 900 reflects a portion of the eighth light 959 leaked from the third surface 820 of the second LGP 800 to the second display area 200 and the remaining eighth light ( And transmits 959 to the first display area 100.

In this case, the light reflection / transmission member 900 is a sheet in which polytetratephthalate (PET) material is foamed.

Referring to the operation of the bi-directional light emitting backlight assembly of Figure 7 having such a configuration as follows.

First, the first light 952 toward the first light incident side 710 and the fifth light 956 toward the second light incident side 810 in the light source 950 of the lamp assembly 940 pass through the air. Thereby reaching the first light incident side 710 and the second light incident side 810 of the second light guide plate 800.

The first light 952 passes through the first light incident side surface 710 and is changed to the second light 953.

At this time, among the second lights 953 reaching the first surface 720, the third light 954 that satisfies the reflection condition by the law of refraction is reflected from the first surface 720, and thus the second surface 730. After passing through the display panel, the display panel 100 faces the first display area 100. Among the second lights 953 reaching the first surface 720, the fourth light 955, which does not satisfy the reflection condition due to the law of refraction, leaks from the first surface 720, and thus the second display area 100. Heads up.

Meanwhile, the fifth light 956 generated by the light source 950 of the lamp assembly 940 passes through the second light incident side surface 810 and is changed into the sixth light 957. The seventh light 958, which satisfies the reflection condition among the laws of refraction among the sixth light 957, is reflected from the third surface 820 and passes through the fourth surface 830, and then passes through the second display area 200. Headed.

Meanwhile, among the sixth lights 957 reaching the third surface 820, the eighth light 959 that does not satisfy the reflection condition among the laws of refraction leaks from the third surface 820 and is the first display area 100. Towards).

Through this process, the third light 954 that is a part of the first light 952 generated by the light source 950 is directed to the first display area 100, and the seventh light 958 that is part of the sixth light 957. Is supplied to the second display area 200.

On the other hand, as described above, the fourth light 955 and the eighth light 959 leak between the first light guide plate 700a and the second light guide plate 800a.

In this case, the fourth light 955 and the eighth light 959 are reflected by the light reflecting / transmitting member 900 described above, and the fourth light 955 is reflected toward the first display area 100 again. The eight light 959 is reflected back toward the second display area 200.

Meanwhile, the thickness of the first surface 720 and the second surface 730 of the first LGP 700a shown in FIG. 7 is constant. That is, the first surface 720 and the second surface 730 have a parallel relationship with each other. In addition, the thickness of the third surface 820 and the fourth surface 830 of the second LGP 800a is also constant. That is, the third surface 820 and the fourth surface 830 have a parallel relationship with each other, and in one embodiment, the first LGP 700a and the second LGP 800a have the same size.
FIG. 8 is a conceptual diagram illustrating a light reflection pattern formed on the light guide plate of FIG. 7. 9 is a conceptual diagram illustrating an optical sheet installed in the bidirectional light exit backlight assembly of FIG. 8.

First light reflecting pads 721 having a dot shape are formed in a matrix shape on the first surface 720 of the first LGP 700a of the backlight assembly 1000b illustrated in FIG. 8. On the third surface 820 of the second LGP 800a, dot-shaped second light reflecting pads 821 are formed in a matrix.

In this case, the size of the first light reflecting pad 721 is continuously increased with distance from the first light incident side 710 based on the first light incident side 710. The size of the second light reflection pad 821 is also continuously increased as it moves away from the second light incident side 810 with respect to the second light incident side 810.

Meanwhile, as illustrated in FIG. 9, the backlight assembly 1000a illustrated in FIG. 7 may further include first optical sheets 740 and second optical sheets 840.

More specifically, the first optical sheet 740 is disposed between the first display area 100 and the first surface 720 facing the first surface 720.

Specifically, the first optical sheet 740 is formed on the surface facing the first surface 720 of the first optical sheet body 742 and the first optical sheet body 742 having a plate shape to improve the brightness. It is composed of a brightness improving unit 744 for further improving. In one embodiment, a plurality of brightness enhancing units 744 are formed in the first optical sheet body 742. The brightness enhancing portion 744 protrudes from the first optical sheet body 742 so that the cross section has a triangular shape.

On the other hand, the second optical sheet 840 is disposed between the second display area 200 and the second surface 820 facing the fourth surface 830.

In detail, the second optical sheet 840 is formed on the surface of the second optical sheet body 842 having a plate shape and the surface of the second optical sheet body 842 facing the fourth surface 830 to improve luminance. It is comprised by the brightness improving part 844 for further improving. In one embodiment, the luminance improving unit 844 is formed in succession with the second optical sheet body 842. This brightness enhancement part 844 protrudes from the second optical sheet body 842 so that the cross section has a triangular shape.
10 is a conceptual diagram of a bidirectional light exit backlight assembly 1000c according to a fifth embodiment of the present invention. FIG. 11 is a graph illustrating distance-specific sizes of the light reflection patterns of FIG. 10. FIG. 12 is a graph comparing distance-specific sizes of the first light reflecting pad and the second light reflecting pad of FIG. 10.

As illustrated in FIG. 10, the sizes of the first LGP 700a and the second LGP 800a of the bidirectional light emitting backlight assembly described with reference to FIG. 7 may be different from each other. In an exemplary embodiment of the present invention, the planar area of the first LGP 700a is larger than the planar area of the second LGP 800b.

As shown in FIG. 10, a first light reflecting pad 725 is formed on the first surface 720 of the first LGP 700a, and a second light is formed on the third surface 820 of the second LGP 800a. Reflective pads 825 are formed.

In this case, when the planar area of the first light guide plate 700a is larger than the planar area of the second light guide plate 800b, the pattern shape of the first light reflection pad 725 formed on the first surface 720 and the third surface 820 may be formed. The patterns of the second light reflection pads 825 formed are different from each other.

More specifically, the sizes of the first light reflecting pad 725 and the second light reflecting pad 825 may include the first light incident side 710 and the second light incident side 810 as shown in the graph of FIG. 11. As the distance from the distance increases, the size increases.

However, the sizes of the first light reflecting pad 725 and the second light reflecting pad 825 are not the same. As shown in the attached graphs a and b of FIG. 12, the size per distance of the second light reflecting pad 825 is greater than the size per distance of the first light reflecting pad 725.

For example, when the dot size of the first light reflecting pad 725 and the second light reflecting pad 825 is measured at a distance A from the first and second light incident sides 710 and 810, the first light is measured. The size of the reflective pad 725 is B, and the size of the second light reflective pad 825 has C greater than B. FIG.
13 is a conceptual diagram of a bidirectional light exit backlight assembly 1000d according to a sixth embodiment of the present invention. FIG. 14 is a conceptual diagram of a bidirectional light exit backlight assembly 1000e in which reflective pads 721 and 821 are removed and optical sheets are installed in the backlight assembly of FIG. 13.

As illustrated in FIG. 13, the first LGP 700b and the second LGP 800c of the bidirectional light exit backlight assembly 1000d may be implemented.

The thickness of the first surface 720 and the second surface 730 based on the second surface 730 of the first LGP 700b is continuously thinned away from the first light incident side surface 710. It has a shape. That is, the first surface 720 has an inclined surface with respect to the second surface 730.

Meanwhile, the thickness of the third surface 820 and the fourth surface 830 based on the third surface 820 of the second light guide plate 800c is continuously thin as the second light incident side surface 810 is closer to the thickness. Losing has an inverted wedge shape. That is, the third surface 820 has an inclined surface with respect to the fourth surface 830, and has a reverse slope with respect to the second surface 730 of the first light guide plate 700b.

Therefore, the first surface 720 of the first LGP 700b and the fourth surface 830 of the second LGP 800c are parallel to each other.

Meanwhile, a first light reflection pad 721 having a dot shape is formed on the first surface 720 of the first LGP 700b which is an inclined surface, and the reverse sloped surface of the second LGP 800c is formed. The second light reflection pad 821 having a dot shape is formed on the third surface 820.

In this case, the first light reflecting pad 721 and the second light reflecting pad 821 increase in size as they move away from the first and second light incident side surfaces 710 and 810.

In FIG. 14, on the other hand, the first optical sheets 750 and the second optical sheets 850 are installed in the bidirectional light output backlight assembly 1000d illustrated in FIG. 13.

More specifically, the first optical sheet 750 is disposed between the first display area 100 and the first surface 720 facing the first surface 720.

In detail, the first optical sheet 750 is formed on a surface of the first optical sheet body 752 having a plate shape and a surface facing the first surface 720 of the first optical sheet body 752, thereby improving luminance. It is composed of a brightness improving unit 754 to further improve. In one embodiment, the luminance improving unit 754 is formed in succession to the first optical sheet body 752. The brightness enhancing portion 754 protrudes from the first optical sheet body 752 so that the cross section has a triangular shape.

 The second optical sheet 850 faces the fourth surface 830 and is disposed between the second display area 200 and the second surface 820.

Specifically, the second optical sheet 850 is formed on the surface of the second optical sheet body 852 and the second optical sheet body 852 having a plate shape facing the fourth surface 830 to increase luminance. It consists of a brightness improving part 854 for improving. In one embodiment, a plurality of brightness enhancing units 854 are formed in the second optical sheet body 852. The brightness enhancing portion 854 protrudes from the second optical sheet body 852 so that the cross section has a triangular shape.
15 is a conceptual diagram of a backlight assembly 1000f according to a seventh embodiment of the present invention. FIG. 16 is a graph illustrating distance-specific sizes of the light reflection patterns of FIG. 15. FIG. 17 is a graph comparing distance-specific sizes of the first light reflecting pad 721 and the second light reflecting pad 822 of FIG. 15.

Referring to FIG. 15, the bidirectional light exit backlight assembly 1000f may configure different sizes of the first LGP 700b and the second LGP 800d. In a preferred embodiment, the planar area of the first LGP 700b is larger than the planar area of the second LGP 800d.

A first light reflecting pad 721 is formed on the first surface 720 of the first LGP 700b and a second light reflecting pad 822 is formed on the third surface 820 of the second LGP 800d. do.

In this case, when the planar area of the first light guide plate 700b is larger than the planar area of the second light guide plate 800d, the pattern shape of the first light reflection pad 721 formed on the first surface 720 and the third surface 820 may be used. The patterns of the second light reflection pads 822 formed are different from each other.

More specifically, the first light reflecting pad 721 and the second light reflecting pad 822 may both have a distance from the first light incident side 710 and the second light incident side 810 as shown in FIG. 16. The further the distance, the larger the size.

In this case, the sizes of the first light reflection pad 721 and the second light reflection pad 822 are not the same. Referring to the graphs a and b of FIG. 17, the size per distance of the second light reflecting pad 822 is greater than the size per distance of the first light reflecting pad 721.

For example, when the dot sizes of the first light reflecting pad 721 and the second light reflecting pad 822 are measured at a distance A from the first and second light incident sides 710 and 810, the first light reflecting is performed. The size of the pad 721 is E, and the size of the second light reflective pad 822 has F greater than E. FIG.
18 is a conceptual diagram of a backlight assembly 1000f according to an eighth embodiment of the present invention.
Referring to FIG. 18, first optical sheets 760 and second optical sheets 860 are installed in the bidirectional light exit backlight assembly 1000f illustrated in FIG. 15.

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More specifically, the first optical sheet 760 is disposed between the first display area 100 and the first surface 720 facing the first surface 720.

In detail, the first optical sheet 760 is formed on a surface of the first optical sheet body 762 having a plate shape and a surface facing the first surface 720 of the first optical sheet body 762 to increase luminance. It consists of a brightness improving part 764 for improving. In one embodiment, the luminance improving unit 764 is continuously formed in the first optical sheet body 762. The brightness enhancing portion 764 protrudes from the first optical sheet body 762 so that the cross section has a triangular shape.

 The second optical sheet 860 is disposed between the second display area 200 and the second surface 820 facing the fourth surface 830.

Specifically, the second optical sheet 760 is formed on the surface of the first optical sheet body 762 having a plate shape and the first surface 720 of the first optical sheet body 762 so as to increase luminance. It consists of a brightness improving part 764 for improving. In one embodiment, the luminance improving unit 764 is continuously formed in the first optical sheet body 762. The brightness enhancing portion 764 protrudes from the first optical sheet body 762 so that the cross section has a triangular shape.

The liquid crystal display panel assembly is combined with the bidirectional light emitting backlight assembly according to various embodiments of the present invention having such a configuration to form a liquid crystal display device. Hereinafter, the bidirectional light emitting backlight assembly, which is a component of the liquid crystal display, has been described in detail above, and thus redundant description thereof will be omitted. In addition, terms and reference numerals used in the above-described process of describing the backlight assembly will be used as they are.
19 is a conceptual diagram of a liquid crystal display according to a ninth embodiment of the present invention. 20 to 23 are conceptual views illustrating the size and positional relationship of liquid crystal display panel assemblies included in the liquid crystal display shown in FIG. 19.

Referring to FIG. 19, the liquid crystal display 1300a may further include a first liquid crystal panel assembly 1100, a second liquid crystal panel assembly 1200, and the bidirectional backlight assembly 500a described with reference to FIG. 1.

More specifically, referring to FIG. 19, the first liquid crystal display panel assembly 1100 is disposed in the first display area 100. The first liquid crystal display panel assembly 1100 may include a third light 325 emitted from the first light exit surface 320 of the bidirectional light exit backlight assembly 500 and a second light reflected from the light reflection / transmitting member 400. A portion of the four light 335 is supplied together to generate the first display light 1110 including information.

Meanwhile, the second liquid crystal display panel assembly 1200 is disposed in the second display area 200. The second liquid crystal display panel assembly 1200 includes light passing through the light reflection / transmitting member 400 among the fourth light 335 emitted from the second light exit surface 330 of the bidirectional light exit backlight assembly 500. Is supplied to generate a second display light 1210 including information.

In this case, as shown in FIG. 19, the first display area of the first liquid crystal display panel assembly 1100 and the second display area of the second liquid crystal display panel assembly 1200 may be set to be the same.

On the other hand, unlike the liquid crystal display device 1300b illustrated in FIG. 20, the first display area of the first liquid crystal display panel assembly 1100 and the second display area of the second liquid crystal display panel assembly 1250 are different from each other. It can also be configured.

In an exemplary embodiment of the present invention, the first display area of the first liquid crystal display panel assembly 1100 is set larger than the second display area of the second liquid crystal display panel assembly 1250.

As such, when the second display area of the second liquid crystal display panel assembly 1250 is smaller than the first display area of the first liquid crystal display panel assembly 1100, the remaining space in the second liquid crystal display panel assembly 1250 will be described later. By placing the drive module, the volume can be further reduced.

In addition, as shown in FIG. 4, when the second light exit surface 332 of the light guide plate 300b is formed to be inclined, the second liquid crystal display panel assembly 1250 may have the same inclination angle as the second light exit surface 332. By providing it, the whole thickness of a liquid crystal display device can be made thinner.

Meanwhile, when the area of the first liquid crystal display panel assembly 1100 is larger than the area of the second liquid crystal display panel assembly 1250, the second liquid crystal display panel assembly 1250 according to the position of the second liquid crystal display panel assembly 1250. ) Optical properties are greatly affected.

In the liquid crystal display device 1300c illustrated in FIG. 21, reference numeral 1252 denotes a first end of the second liquid crystal display panel assembly 1250, and reference numeral 1254 denotes a second end facing the first end.

In a preferred embodiment, the first end 1252 of the second liquid crystal display panel assembly 1250 is aligned with the light incident side surface 310 of the light guide plate 300a described above. As such, when the first end 1252 of the second liquid crystal display panel assembly 1250 is aligned with the light incident side surface 310, more light may be acquired than other positions.

Meanwhile, when the first end 1252 of the second liquid crystal display panel assembly 1250 is aligned with the light incident side surface 310 as described above with reference to FIG. 21, the second liquid crystal display panel assembly 1250 is advantageous in terms of luminance. There is a big constraint on the position of.

In order to prevent this, in the present invention, as shown in FIG. 22, the position of the second liquid crystal display panel assembly 1250 is spaced apart from the light incident side surface 310 of the light guide plate 300 by a predetermined distance. Can be. That is, the liquid crystal display panel assembly 1250 may be positioned at the center of the second light exit surface 330 based on the second light exit surface 330 of the light guide plate 300. In this case, although there is a luminance constraint than the embodiment described above with reference to FIG. 21, the constraint of the installation position has another advantage of being reduced accordingly.

Meanwhile, FIG. 23 illustrates another embodiment of the second liquid crystal display panel assembly 1250. In the embodiment of FIG. 23, the light reflection / transmission member described above with reference to the second end 1354 of the second liquid crystal display panel assembly 1250. It is also possible to align the reference numeral 410, which is the end of the (400).

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In this case, the first liquid crystal display panel assembly 1100 and the second liquid crystal display panel assembly 1250 are both driven by the same driving signal applying unit 1300, so that the first and second liquid crystal display panel assemblies 1100 and 1250 All display the same image.

In contrast, the first liquid crystal panel assembly 1100 includes a first driving module for generating a first driving signal, and the second liquid crystal panel assembly 1250 includes a second driving module for generating a second driving signal. do. That is, in this manner, the first LCD panel assembly 1100 displays the first image, and the second LCD panel assembly 1250 allows the second image different from the first image to be displayed.

On the other hand, at least one of the second liquid crystal display panel assembly 1100 and the second liquid crystal display panel assembly 1250 illustrated in FIGS. 20 to 23 may include the thin film transistor 1400 and the thin film transistor ( The pixel electrode 1450 to which power is applied from the 1400, and may be driven by an active matrix method to form an electric field for controlling the liquid crystal by the driving signal applying unit 1470 controlling them.

In this case, the first liquid crystal display panel assembly 1100 and the second liquid crystal display panel assembly 1250 are both driven by the same driving signal applying unit 1300, so that the first and second liquid crystal display panel assemblies 1100 and 1250 All display the same image.

In contrast, the first liquid crystal panel assembly 1100 includes a first driving module for generating a first driving signal, and the second liquid crystal panel assembly 1250 includes a second driving module for generating a second driving signal. do. That is, in this manner, the first LCD panel assembly 1100 displays the first image, and the second LCD panel assembly 1250 allows the second image different from the first image to be displayed.
26 is a conceptual diagram of a liquid crystal display according to a second embodiment of the present invention. FIG. 27 is a conceptual diagram illustrating the size and positional relationship of liquid crystal display panels of a liquid crystal display according to a second exemplary embodiment of the present invention.

Referring to FIG. 26, the liquid crystal display 1700a may further include a first liquid crystal panel assembly 1500, a second liquid crystal panel assembly 1600, and the bidirectional backlight assembly 1000a described with reference to FIG. 7.

More specifically, referring to FIG. 26, the first liquid crystal display panel assembly 1500 is disposed in the first region 100. The first liquid crystal panel assembly 1500 includes a third light 954 emitted from the second surface 730 of the bidirectional light output backlight assembly 1000 and a fourth light reflected from the light reflecting / transmitting member 900. 955 is supplied together to generate a first display light 1510 including information.

Meanwhile, the second liquid crystal display panel assembly 1600 is disposed in the second region 200. The second liquid crystal display panel assembly 1600 may include a seventh light 959 emitted from the third surface 830 of the bidirectional light output backlight assembly 1000 and an eighth light reflected from the light reflecting / transmitting member 900. A portion of 959 is supplied to generate a second display light 1610 including information.

In this case, as illustrated in FIG. 26, the first display area of the first liquid crystal display panel assembly 1500 and the second display area of the second liquid crystal display panel assembly 1600 may be set to be the same.

On the other hand, as shown in FIG. 27, the first display area of the first liquid crystal display panel assembly 1500 and the second display area of the second liquid crystal display panel assembly 1600 may be different from each other.

According to an exemplary embodiment of the present invention, the first display area of the first liquid crystal display panel assembly 1500 is larger than the second display area of the second liquid crystal display panel assembly 1600.

As such, when the area of the first liquid crystal display panel assembly 1500 is greater than the area of the second liquid crystal display panel assembly 1600, the second liquid crystal display panel assembly 1600 may be disposed according to the position of the second liquid crystal display panel assembly 1600. The optical properties of are greatly affected.
27 is a conceptual diagram illustrating the size and positional relationship of liquid crystal display panels of the liquid crystal display device 1700b according to the second embodiment of the present invention.

In FIG. 27, reference numeral 1620 denotes a first end of the second LCD panel assembly 1600, and reference numeral 1640 denotes a second end facing the first end.

In an exemplary embodiment, the first end 1620 of the second LCD panel assembly 1600 is aligned with the light incident side surface 810 of the second LGP 800 described above. As such, when the first end 1620 of the second liquid crystal display panel assembly 1600 is aligned with the light incident side surface 810, more light may be acquired than other positions.

Meanwhile, when the first end 1620 of the second liquid crystal display panel assembly 1600 is aligned with the light incident side surface 810 of the second LGP 800 as described above, the second liquid crystal display is advantageous in terms of luminance. Large constraints arise in the position of the panel assembly 1600.

In order to prevent this, in the present invention, the position of the second liquid crystal display panel assembly 1600 illustrated in FIG. 27 is spaced apart from the light incident side surface 810 of the light guide plate 800 by a predetermined distance, or the second liquid crystal display panel assembly is installed. It is also acceptable to align the second end 1640 of 1260 to 910, which is the end of the light reflecting / transmitting member 900 described above.

Meanwhile, at least one of the first liquid crystal display panel assembly 1500 and the second liquid crystal display panel assembly 1600 illustrated in FIG. 26 may cross each other horizontally and vertically without using the thin film transistor as shown in FIG. 24 described above. After the liquid crystal is injected between the two first electrodes 1310 and the second electrode 1320, the driving signal applying unit 1300 may be driven in a passive matrix manner to form an electric field for controlling the liquid crystal. .                     

In this case, the first liquid crystal display panel assembly 1500 and the second liquid crystal display panel assembly 1600 are both driven by the same driving signal applying unit 1300, so that the first and second liquid crystal display panel assemblies 1100 and 1200 All display the same image.

In contrast, the first liquid crystal panel assembly 1500 includes a first driving module for generating a first driving signal, and the second liquid crystal panel assembly 1600 includes a second driving module for generating a second driving signal. do. That is, in this manner, the first LCD panel assembly 1500 displays the first image, and the second LCD panel assembly 1600 displays the second image different from the first image.

On the other hand, at least one of the first liquid crystal display panel assembly 1500 and the second liquid crystal display panel assembly 1600 shown in FIG. 26 may be formed from the thin film transistor 1400 and the thin film transistor 1400 as shown in FIG. 25. The pixel electrode 1450 to which power is applied may be driven, and the driving signal applying unit 1470 may be driven in an active matrix manner to form an electric field for controlling the liquid crystal.

In this case, the first liquid crystal display panel assembly 1500 and the second liquid crystal display panel assembly 1600 are both driven by the same driving signal applying unit 1300, so that the first and second liquid crystal display panel assemblies 1500 and 1600 are All display the same image.

On the contrary, the first liquid crystal display panel assembly 1500 includes a first driving module for generating a first driving signal, and the second liquid crystal display panel assembly 1600 includes a second driving module for generating a second driving signal. Include. That is, in this manner, the first LCD panel assembly 1500 displays the first image, and the second LCD panel assembly 1600 displays the second image different from the first image.

As described above in detail, it is possible to implement a liquid crystal display device that satisfies various needs of consumers of higher quality by enabling the display of the same image in two directions or displaying different images with different luminance.

In the detailed description of the present invention described above with reference to a preferred embodiment of the present invention, those skilled in the art or those skilled in the art having ordinary knowledge in the scope of the invention described in the claims to be described later It will be understood that various modifications and variations can be made in the present invention without departing from the scope of the present invention.

Claims (42)

delete delete delete delete delete delete delete delete A lamp assembly disposed between the first display area and the second display area and configured to supply a first light between the first display area and the second display area; A first light incident side surface for changing the first light into some second light, a first surface reflecting a third light which is a part of the second light passing through the first light incident side surface to the first display area, A first light guide plate formed on the first surface, the first light guide plate having a second surface facing the first surface and emitting the third light; A second light incident side for changing the first light into the remaining second light, a third surface reflecting a seventh light that is a part of the second light passing through the second light incident side to the second display area, A second light guide plate formed on the third surface and having a fourth surface facing the third surface and for emitting the seventh light; And A portion of the fourth light leaked from the first surface and interposed between the first surface and the third surface and separated from the first surface and the third surface, and reflecting a portion of the fourth light leaked from the first surface to the first display area; Transmitting the remainder of the fourth light leaked from the second display area, reflecting a part of the eighth light leaked from the third surface to the second display area, and remaining of the eighth light leaked from the third surface. And a light reflection / transmitting member for transmitting the light to the first display area. 10. The bidirectional light emission of claim 9, wherein the first surface and the second surface of the first LGP are parallel to each other, and the third and fourth surfaces of the second LGP are parallel to each other. Backlight assembly. The method of claim 10, wherein the first and second light reflecting pads have a dot shape, and the size of the first and second light reflecting pads increases as a distance from the first and second light incident sides increases. A bidirectional light exit backlight assembly, characterized in that the enlargement. The optical system of claim 10, wherein a first optical sheet for improving the optical characteristics of the third light is disposed at the surface facing the second surface, and an optical characteristic of the seventh light is improved at the surface facing the fourth surface. And a second optical sheet for discharging the backlight unit. 13. The method according to claim 12, wherein the first optical sheet has a first luminance enhancement projecting to have a triangular cross section from a first optical sheet body having a plate shape and a surface facing the second surface of the first optical sheet body. A second brightness enhancement protrusion protruding to have a triangular cross section from a second optical sheet body having a plate shape and a surface of the second optical sheet body facing the fourth surface of the second optical sheet body; Bidirectional light exit backlight assembly comprising a. 12. The bidirectional light emitting backlight assembly of claim 10, wherein the planar area of the first light guide plate is larger than the planar area of the second light guide plate. The method of claim 14, wherein the first and second light reflecting pads have a dot shape, and the size of the first and second light reflecting pads increases as a distance from the first and second light incident sides increases. Wherein the rate of change in size per distance of the second light reflecting pad is greater than the rate of change in size per distance of the first light reflecting pad. 10. The method of claim 9, wherein the thickness of the second surface and the first surface with respect to the second surface of the first light guide plate becomes thicker closer to the first light incident side surface, and the second surface of the second light guide plate The thickness of the fourth surface and the third surface relative to the fourth surface becomes thinner as the second surface is closer to the second light incident side surface, and the second and fourth surfaces are parallel to each other. . The method of claim 16, wherein the first and second light reflecting pads have a dot shape, and the size of the first and second light reflecting pads increases as the distance from the first and second light incident sides increases. A bidirectional light exit backlight assembly, characterized in that the enlargement. 17. The bidirectional light emitting backlight assembly of claim 16, wherein the planar area of the first light guide plate is greater than the planar area of the second light guide plate. 19. The method of claim 18, wherein the first and second light reflecting pads have a dot shape, and the size of the first and second light reflecting pads increases as the distance from the first and second light incident sides increases. Wherein the rate of change in size per distance of the second light reflecting pad is greater than the rate of change in size per distance of the first light reflecting pad. 17. The bidirectional light exit backlight assembly of claim 16, wherein a first optical sheet is disposed on the side facing the second side, and a second optical sheet is disposed on the side facing the fourth side. 21. The method of claim 20, wherein the first optical sheet has a first brightness enhancement projecting to have a triangular cross-section from the first optical sheet body having a plate shape and the surface facing the second surface of the first optical sheet body A second brightness enhancement protrusion protruding to have a triangular cross section from a second optical sheet body having a plate shape and a surface of the second optical sheet body facing the fourth surface of the second optical sheet body; Bidirectional light exit backlight assembly comprising a. 10. The lamp assembly of claim 9, wherein the lamp assembly comprises a lamp that generates light radially, the second surface and the fourth surface with the lamp positioned inward to change the light generated by the lamp to the first light. And a lamp reflector fixed to the bidirectional light exit backlight assembly. delete delete delete delete delete delete delete delete delete delete delete A lamp assembly disposed between the first display area and the second display area and configured to supply a first light between the first display area and the second display area; A first light incident side for changing the first light into a part of the second light, and a third light which is a part of the second light passing through the first light incident side is reflected to the first display area and the remaining fourth light Is a first light guide plate having a first surface for transmitting toward the second display area, first light reflecting pads formed on the first surface, and a second surface facing the first surface and emitting the third light; ; A second light incident side for changing the first light to the remaining second light, and a seventh light which is a part of the second light passing through the second light incident side is reflected to the second display area and the remaining eighth light Is a second surface having a third surface for transmitting toward the first display area, second light reflecting pads formed on the third surface, and a fourth surface facing the third surface and emitting the seventh light. Light guide plate; A portion of the fourth light leaked from the first surface and interposed between the first surface and the third surface and separated from the first surface and the third surface, and reflecting a portion of the fourth light leaked from the first surface to the first display area; Transmitting the remainder of the fourth light leaked from the second display area, reflecting a part of the eighth light leaked from the third surface to the second display area, and remaining of the eighth light leaked from the third surface. A light reflection / transmission member for transmitting the light to the first display area; A first liquid crystal panel assembly configured to generate first display light including information based on the third light and the fourth light; And And a second liquid crystal display panel assembly configured to generate a second display light including information based on the seventh and eighth lights. 35. The liquid crystal display device according to claim 34, wherein the first display area of the first liquid crystal display panel assembly and the second display area of the second liquid crystal display panel assembly are the same. 35. The liquid crystal display device according to claim 34, wherein the first display area of the first liquid crystal display panel assembly is larger than the second display area of the second liquid crystal display panel assembly. 35. The liquid crystal display device according to claim 34, wherein the first end of the second liquid crystal display panel assembly is aligned with the light incident side of the light guide plate. 35. The liquid crystal display device according to claim 34, wherein at least one of the first liquid crystal display panel assembly and the second liquid crystal display panel assembly comprises an active matrix liquid crystal display panel having a thin film transistor. 35. The liquid crystal display device according to claim 34, wherein at least one of the first liquid crystal display panel assembly and the second liquid crystal display panel assembly comprises a passive matrix liquid crystal display panel. 35. The liquid crystal display device according to claim 34, wherein the first liquid crystal display panel assembly and the second liquid crystal display panel assembly further comprise a driving module for generating a driving signal. 35. The liquid crystal display panel of claim 34, wherein the first liquid crystal display panel assembly further comprises a first driving module configured to display first information by a first driving signal, and the second liquid crystal display panel assembly further comprises a second driving signal by a second driving signal. And a second driving module for displaying information. 35. The lamp assembly of claim 34, wherein the lamp assembly comprises a lamp that generates light radially, the second surface and the fourth surface with the lamp positioned inward to change the light generated by the lamp to the first light. And a lamp reflector fixed to the liquid crystal display.

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