KR101990499B1 - Liquid crystal display device - Google Patents

Abstract

A liquid crystal display is disclosed according to an embodiment of the present disclosure. The liquid crystal display includes a liquid crystal; At least one light source disposed in at least one direction of the light transmission layer disposed under the liquid crystal and emitting light to the light transmission layer; A light transmitting layer disposed on the lower surface of the liquid crystal to include a fine pattern on one surface of the light transmitting layer and transmitting light incident from the light source to a lower portion of the liquid crystal; A first polarizer disposed between the lower portion of the liquid crystal and the light transmission layer and configured to polarize light introduced from the light transmission layer; And a second polarizer disposed on the liquid crystal and blocking at least part of the light transmitted through the liquid crystal; . ≪ / RTI >

Description

[0001] LIQUID CRYSTAL DISPLAY DEVICE [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present disclosure relates to a liquid crystal display device, and more specifically, to a liquid crystal display device capable of reducing the thickness of a backlight unit.

Liquid crystal displays (LCDs) are one of the most widely used flat panel display devices and utilize the property of changing the arrangement of molecules when voltage is applied. Liquid crystal display devices can be made thinner than other display devices, and are excellent in resolution, color display, and image quality, and have low power consumption, so that they can be driven by batteries and are widely used in notebook computers and desktop monitors.

BACKGROUND ART [0002] A backlight unit that supplies light to a liquid crystal panel that displays an image in a liquid crystal display device is a necessary core component. Generally, the backlight unit includes a light source, a light guide plate for guiding the light generated from the light source to the display panel, and an optical sheet disposed on the light guide plate and for changing characteristics of light emitted from the light guide plate. When a voltage is applied between the electrodes of the optical sheet, an electric field is formed and the electric field formed changes the arrangement of the liquid crystal molecules constituting the liquid crystal layer. As a result, the polarization of the light passing through the liquid crystal layer changes, and the amount of light transmitted through the polarizing plate changes with the change in the polarization of the light. Therefore, if the size of the electric field is adjusted, the amount of light transmitted through the polarizing plate can be changed.

Many researches have been actively conducted to improve the resolution and the reaction rate of the liquid crystal display device. It is also important to reduce the weight of the liquid crystal display device and the thickness of the backlight unit in a liquid crystal display device widely used for portable use.

Korean Patent Publication No. KR2011-0068212 discloses a transparent display element having a plurality of air layers formed inside a light guide plate to totally reflect incident light. There is a need in the art to develop a technique for transmitting all light to one side of a light guide plate. In addition, there is a need to develop a technique that can reduce the thickness of the backlight.

This disclosure is devised in response to the background art described above, and is intended to provide a liquid crystal display device having a high luminance and light in weight.

The present disclosure is intended to provide a liquid crystal display device with reduced thickness.

A liquid crystal display device according to an embodiment of the present disclosure for realizing the above-described problems is disclosed. In the liquid crystal display device,

Liquid crystal;

At least one light source disposed in at least one direction of the light transmission layer disposed under the liquid crystal and emitting light to the light transmission layer;

A light transmission layer disposed at a lower portion of the liquid crystal to transmit light incident from the light source to a lower portion of the liquid crystal;

A first polarizer disposed between the lower portion of the liquid crystal and the light transmission layer and configured to polarize light introduced from the light transmission layer; And

A second polarizer disposed on the liquid crystal and blocking at least part of the light transmitted through the liquid crystal;

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Alternatively, the light-transmitting layer may further include a fine pattern on one side.

Alternatively, the light-transmitting layer may be characterized in that it totally reflects incident light.

Alternatively, the liquid crystal display may be arranged in the other direction opposing at least one direction of the light transmitting layer in which the light source is disposed, so that light output to the other direction of the light source of the light transmitting layer is directed into the light transmitting layer And a reflector for reflecting light.

Alternatively, the fine pattern may be a fine pattern whose cross section is embossed or engraved in a polygonal shape, a fine pattern whose cross section is embossed or engraved in a circular shape, or a pattern in which the cross section is embossed or engraved It can be a fine pattern.

Alternatively, the fine patterns may have different densities of the fine patterns depending on distances between the light sources and the fine patterns so that light incident from the light sources is uniformly transmitted to the upper surface of the light transmission layer.

Alternatively, the light transmitting layer may have a fine pattern for the remaining portion in which at least a part of the lower portion of the light transmitting layer is located in the total reflection coating and the total reflection coating is not located.

Alternatively, the liquid crystal display may include a reflective sheet disposed below the light transmission layer and capable of reflecting light transmitted through the light transmission layer in the liquid crystal direction.

Alternatively, the liquid crystal display may be arranged between the light transmission layer and the reflection sheet to refract light incident on the reflection sheet so that light reflected from the reflection sheet can exit without being totally reflected by the light transmission layer And may further include an optical sheet.

Alternatively, the liquid crystal display may further include a first electrode disposed on one surface of the first polarizer.

Alternatively, the liquid crystal display may further include a second electrode disposed on one surface of the second polarizer.

Alternatively, the liquid crystal display may include a member disposed above the second polarizer plate to protect the lower component.

Further, a light emitting unit is disclosed according to an embodiment of the present disclosure. Wherein the light emitting unit is a light emitting unit capable of supplying light to a panel of a liquid crystal display device,

At least one light source disposed in at least one direction of the light transmission layer and emitting light to the light transmission layer;

A light transmission layer for transmitting light incident from the light source to a lower portion of the liquid crystal;

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Further, a liquid crystal display device is disclosed according to an embodiment of the present disclosure. The liquid crystal display includes a liquid crystal;

At least one light source disposed in at least one direction of the light transmission layer disposed under the liquid crystal and emitting light to the light transmission layer;

A light transmission layer disposed at a lower portion of the liquid crystal to transmit light incident from the light source to a lower portion of the liquid crystal;

A second polarizer disposed on the liquid crystal and blocking at least part of the light transmitted through the liquid crystal;

A reflective sheet disposed under the light transmission layer and reflecting the light transmitted through the light transmission layer in a liquid crystal direction and polarizing the light first;

And the liquid crystal display device.

The present disclosure can provide a liquid crystal display device having a high luminance and light in weight.

The present disclosure can provide a liquid crystal display device with reduced thickness.

Some of the embodiments are shown in the accompanying drawings, in which the features of the present disclosure referred to above are understood in detail, with the following detailed description, and with reference to the following embodiments. In addition, like reference numerals in the drawings are intended to refer to the same or similar functions throughout the several views. It should be understood, however, that the appended drawings illustrate only typical exemplary embodiments of this disclosure and are not to be considered limiting of its scope, and that other embodiments having the same effect may be fully recognized Please note.
1 is a schematic view showing the overall structure of a conventional liquid crystal display device.
2 is a schematic diagram showing the overall concept of one embodiment of the present disclosure;
Fig. 3 is an exemplary view showing total reflection of light in the light transmission layer of a liquid crystal display according to an embodiment of the present disclosure; Fig.
4 is an exemplary view showing an example of a liquid crystal display device according to an embodiment of the present disclosure.
Figures 5A, 5B, 5C, and 5D are illustrations showing an example of a micropattern of a light transport layer according to one embodiment of the present disclosure.
6 is an exemplary view showing another example of a light transmitting layer according to an embodiment of the present disclosure;
7 is an exemplary diagram illustrating the path of light along the location of a fine pattern in accordance with one embodiment of the present disclosure;

Various embodiments are now described with reference to the drawings. In this specification, various explanations are given in order to provide an understanding of the present disclosure. It will be apparent, however, that such embodiments may be practiced without these specific details.

In addition, the term "or" is intended to mean " exclusive or " That is, it is intended to mean one of the natural inclusive substitutions "X uses A or B ", unless otherwise specified or unclear in context. That is, X uses A; X uses B; Or when X uses both A and B, "X uses A or B" can be applied to either of these cases. It should also be understood that the term "and / or" as used herein refers to and includes all possible combinations of one or more of the listed related items.

It is also to be understood that the term " comprises "and / or" comprising " means that the feature and / or component is present, but does not exclude the presence or addition of one or more other features, components and / It should be understood that it does not. Also, unless the context clearly dictates otherwise or to the contrary, the singular forms in this specification and claims should generally be construed to mean "one or more. &Quot;

The description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the disclosure. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the scope of the present disclosure. Thus, the present disclosure should not be construed as limited to the embodiments set forth herein, but is to be accorded the widest scope consistent with the principles and novel features presented herein.

1 is a schematic view showing the overall structure of a conventional liquid crystal display device. A liquid crystal display device 100 according to an embodiment of the present invention includes a liquid crystal panel 200, a light guide plate 900, a light source 300 disposed on the side of the light guide plate 900, A sheet 600, an optical sheet 700 for changing the properties of light, a first polarizing plate 510, a second polarizing plate 520, a liquid crystal panel 200, a second electrode 522 located above the liquid crystal panel 200 A first electrode 512 positioned at a lower portion, a protection member 800, and a glass sheet 410. The light guiding plate 900 can be removed and the function of the light guiding plate 900 can be replaced by the light transmitting layer 40 located at the position of the glass sheet 410. [ Since the light transmitting layer 40 also includes the function of the glass sheet 400 of the present invention, the present invention can be configured without a backlight module. Therefore, the present invention can constitute a liquid crystal display device thinner than the conventional invention.

All of the light emitted from the light source 30 may be transmitted to the liquid crystal 20 through the reflective sheet 60 under the light transmission layer 40 according to an embodiment of the present disclosure. In addition, the fine pattern 41 of the light transmitting layer 40 can move the light in one direction by changing the travel path of the light. In the related art, a part of the light entering the light guide plate 900 may be emitted to the upper portion of the light guide plate 900, and a part of the remaining light may be emitted to the lower portion of the light guide plate 900. Light emitted to the lower portion of the light guide plate 900 can be reflected by the reflective sheet 600 and reach the liquid crystal panel 200. However, since all of the light of the present disclosure is transmitted to the liquid crystal 20 through the reflective sheet 60, the optical sheet 70 that refracts the light so that the light can be normally incident on the reflective sheet 60, And the reflective sheet 60, as shown in Fig. The optical sheet 70 for refracting light may be disposed on the upper portion of the light transmitting layer 40 so that light can be normally incident on the liquid crystal 20. [ In addition, in the present disclosure, the function of the glass sheet 410 and the function of the light guide plate 900 can be replaced by the light transmitting layer 40 that changes the light traveling path. The first electrode 511 may be disposed on or under the first polarizing plate 51 and the second electrode 521 may be disposed on the upper or lower surface of the second polarizing plate 52. Since the technique of stacking the electrodes on the polarizer requires a high temperature process, the present disclosure can use materials different from those used in the conventional polarizer. Specifically, a liquid crystal device can be used instead of the existing acrylic or PVA (polyvinyl alcohol).

2 is a schematic diagram showing the overall concept of one embodiment of the present disclosure;

A liquid crystal display 10 according to an embodiment of the present disclosure includes a liquid crystal 20, at least one light source 30, a light transmitting layer 40 including a fine pattern 41 on one surface thereof, 51, and a second polarizing plate 52. The liquid crystal 20 may be positioned between the first polarizing plate 51 and the second polarizing plate 52 and the light transmitting layer 40 may be positioned below the first polarizing plate 51. Also, the light source 30 may be disposed in at least one direction of the light transmission layer 40, and the light source 30 may use various kinds of light sources at the same time. 2, all the light emitted from the light source 30 passes through the light transmitting layer 40 and is incident on the first polarizing plate 40 disposed on the upper portion of the light transmitting layer 40, (51) and can be polarized in one direction. The polarized light passes through the liquid crystal 20 and is transmitted through the second polarizer 52 on the liquid crystal 20 to display a color.

According to one embodiment of the present disclosure, the liquid crystal 20 is disposed between the first polarizer 51 and the second polarizer 52 to change the polarization direction of light in the liquid crystal display 10 . The liquid crystal 20 can display an image using the light transmitted through the light transmission layer 40 under the liquid crystal 20.

Although not shown in the drawing, the liquid crystal 20 includes a thin film transistor array substrate, a color filter substrate, and a liquid crystal layer therebetween, so that an image can be realized as a signal is applied from the outside. The thin film transistor array substrate may have a plurality of gate lines and data lines arranged vertically and horizontally to define a plurality of pixel regions. A thin film transistor, which is a switching element, may be formed in each pixel region, and a pixel electrode formed in the pixel region may be formed. The detailed description of the liquid crystal described above is merely an example, and the present disclosure may include any kind of liquid crystal. The thin film transistor includes a gate electrode connected to a gate line, a semiconductor layer formed by stacking amorphous silicon or the like on the gate electrode, a first electrode 511 and a second electrode 521 formed on the semiconductor layer . The first electrode 511 and the second electrode 521 may be connected to the data line and the pixel electrode, and may include a source electrode and a drain electrode.

The liquid crystal 20 may include a display area DA and a peripheral area PA surrounding the display area DA. The display area DA adjusts the transmittance of light provided by the light emitting unit to display an image. In the liquid crystal 20, a plurality of pixels may be arranged in a matrix in a pixel region. Each of the pixels may be connected to a gate line and a data line crossing the gate line. Each of the pixels may include a switching element connected to the gate line and the data line, and a pixel electrode electrically connected to the switching element. The liquid crystal 20 is arranged by the voltage applied to the pixel electrode, the first electrode 511 and the second electrode 521 so that the liquid crystal 20 can control the transmittance of light provided by the light emitting unit have. The pixel may further comprise a color filter comprising a colored pigment. For example, the color filter may include Red, Green, Blue, Yellow, Cyan, or Magenta. The color filter described above is merely an example, and the present invention is not limited thereto.

4 is an exemplary view showing a liquid crystal display according to an embodiment of the present disclosure.

The first electrode 511 and the second electrode 521 may be positioned on the semiconductor layer in the substrate included in the liquid crystal. In addition, the first electrode may be located at the upper portion or the lower portion of the first polarizer, and the second electrode may be formed at the upper portion or the lower portion of the second polarizer. The electrode and the polarizing plate may be separately prepared in the process, and the electrode may be disposed on the polarizing plate, or the electrode may be directly laminated on the polarizing plate surface. At this time, the first polarizing plate 51 and the second polarizing plate 52 may be made of the same material as the liquid crystal device to withstand high-temperature processes.

The light source 30 may be disposed laterally of the light transmitting layer 40 to transmit light to the light transmitting layer 40. The light source 30 may use a fluorescent lamp such as a cold cathode fluorescent lamp (CCFL) or an external electrode fluorescent lamp (EEFL). Also, the light source 30 may use a plurality of LEDs (Light Emitting Device). The LEDs may be red, green, blue, yellow, cyan, magenta, white, and combinations thereof. The disclosure of the kind of the above-mentioned light source is merely an example, and the present invention is not limited thereto.

The light transmitting layer 40 may include a widely used plastic such as polymethyl methacrylate (PMMA), polycarbonate (PC) resin, acrylic resin, and the like. The light transmitting layer 40 may also comprise glass or silicon that has been used as the protective member 80 of conventional liquid crystal displays. The light source 30 may be disposed in at least one direction of the light transmission layer 40 and the light sources 30 may be disposed in at least one of the outer edges of the light transmission layer 40 . The disclosure relating to the material of the above-mentioned light-transmitting layer is only an example, and the present invention is not limited thereto.

The liquid crystal display 10 according to an embodiment of the present disclosure is disposed in the other direction opposing at least one direction of the light transmitting layer 40 in which the light source 30 is disposed and the light source of the light transmitting layer 40 30 to reflect the light output in the other direction to the inside of the light transmitting layer 40. The liquid crystal display 10 can reflect the light going to the side of the light transmitting layer 40 through the side reflecting plate 90 back to the inside and obtain a high luminance. The light reflected by the side reflecting plate 90 into the light transmitting layer is not changed as compared with the case where the angle of incidence to the upper or lower boundary surface of the light transmitting layer 40 is transferred to the inside of the light transmitting layer for the first time, The total reflection continues until it touches the fine pattern 41. [ The side reflector 90 disclosed in this disclosure is not limited to being disposed in the other direction of the light source but may be disposed at all lateral positions of the light transmission layer 40 through which light can exit.

According to an embodiment of the present disclosure, the liquid crystal display device 10 may further include a reflection sheet 60 disposed below the light transmission layer and capable of reflecting light transmitted through the light transmission layer in a liquid crystal direction. The reflective sheet 60 may include a polarizing layer, and the polarizing layer may transmit or reflect only a selected one of P-wave and S-wave among the input light. The light reflected by the reflection sheet enters the light transmitting layer 40 again, and the incident angle is greater than the total reflection critical angle, so that the light can be transmitted to the liquid crystal 20 without being totally reflected within the light transmitting layer 40.

The liquid crystal display 10 may be disposed between the light transmitting layer 40 and the reflective sheet 60 so that light transmitted through the light transmitting layer 40 is transmitted to the light transmitting layer 40, And an optical sheet 70 for refracting the incident light to the reflective sheet 60 so as to be emitted from the reflective sheet 60. The optical sheet 70 may include polyethylene terephthalate (PET), polycarbonate (PC), polymethyl methacrylate (PMMA), and polystyrene (PS) The foregoing description is only illustrative and the present disclosure is not limited thereto. The optical sheet 70 may be composed of two optical sheets 70 as shown in FIG. 3 and may include three or more optical sheets 70 to finely adjust the output angle. The description related to the kind of the optical sheet described above is merely an example, and the present disclosure is not limited thereto. In Fig. 4, the optical sheet 60 may be disposed with the upper light-transfer layer 40 or the lower reflective sheet 60 and the air layer interposed therebetween. Further, other components may be disposed directly on the top or bottom of the optical sheet 60 without an air layer. The air layer above or below the optical sheet may be used to adjust the outgoing path of light by making the refraction of light larger.

According to an embodiment of the present disclosure, the liquid crystal display 10 may further include a protection member 80 disposed on the second polarizer 52 to protect the lower component. In addition, the protective member 80 can guide the lower component.

The first polarizing plate 51 and the light transmitting layer 40 may be attached to each other or may be apart from each other so that an air layer or a vacuum layer is formed between the first polarizing plate 51 and the light transmitting layer 40 It may exist. The second polarizing plate 52 and the protection member 80 may be attached to each other or may be apart from each other so that an air layer or a vacuum layer may exist between the second polarizing plate 52 and the protection member 80. The second polarizing plate 52 may be located between the second electrode 521 and the protection member 80, but may be disposed on the protection member 80 or may be removed.

According to an embodiment of the present disclosure, an electrode may be disposed on the upper portion or the lower portion of the liquid crystal 20 so as to simultaneously process two functions of the first electrode 511 and the second electrode 521. When the electrode is disposed on the liquid crystal 20, the light transmitting layer 40 may be in contact with the liquid crystal 20 and may be spaced apart from the light transmitting layer 40 and the liquid crystal 20 by an air layer or a vacuum layer May exist. The liquid crystal 20 and the protection member 80 may be in contact with each other when the electrode is disposed under the liquid crystal 20 and the air or vacuum layer may be interposed between the liquid crystal 20 and the protection member 80 It may exist.

Figures 5A, 5B, 5C, and 5D are illustrations showing an example of a micropattern of a light transport layer according to one embodiment of the present disclosure.

The light transmitting layer 40 according to an embodiment of the present disclosure may include a fine pattern 41 on one side. The fine pattern 41 may be manufactured using an etching process or a patterning process. As shown in FIG. 5A, the fine pattern 41 may be embossed with a circular pattern 411 under the light transmitting layer 40. Also, as shown in FIG. 5B, the polygonal pattern 412 may be arranged with a negative angle. Figures 5A, 5B, 5C, and 5D illustrate only certain exemplary embodiments of the present disclosure and are not considered to limit the scope of the present disclosure. Thus, the shape of any regular fine pattern 41 may be embossed or engraved, and a non-regular fine pattern 41 may be included to induce light to exit in a particular direction. The size of the fine pattern 41 may vary in size from several nanometers to several millimeters in size. The description regarding the process of the above-described fine pattern and the description of the size of the fine pattern are merely illustrative, and the present disclosure is not limited thereto.

According to an embodiment of the present disclosure, the fine pattern 41 formed on one surface of the light transmitting layer 40 may be formed as a part of a triangle as shown in FIG. 5C. When the light incident on the light transmitting layer 40 is totally reflected and then reaches the triangular fine pattern 413, the light can be transmitted to the lower portion of the light transmitting layer 40 without being reflected back to the light transmitting layer 40. The fine pattern 41 formed on the light transmitting layer 40 may have a shape of any irregular fine pattern 41 that can transmit light to the lower portion of the light transmitting layer 40 when the light reaches the fine pattern 41. [ May also be included.

Although not shown in the drawing, the fine pattern 41 may exist inside the light transmitting layer 40 in addition to the surface of the light transmitting layer 40. When the incident light transmits a fine pattern in the light transmitting layer 40, the light can be refracted and transmitted to one side of the light transmitting layer. The fine pattern inside the light transmitting layer 40 may be formed of an air layer or a material having a different refractive index (for example, ethyl alcohol liquid). The inner air layer of the light transmission layer 40 may be formed at regular intervals and shapes by a laser technique or a mold injection. The above description of the method of making a pattern inside is merely an example, and the present disclosure is not limited thereto.

In the optical transmission layer 40 of the present disclosure, the air layer and the fine pattern 41 on one side may be formed of a plurality of layers. 5A and 5B, the fine pattern 41 is uniformly formed as one layer over the entire light transmitting layer 40. However, in this embodiment, the air layer and the fine pattern 41 At the same time, it can be distributed in two or more layers over the entire optical transmission layer 40.

Light incident on the light transport layer 40 may be totaled depending on the configuration of the light transport layer 40, in accordance with one embodiment of the present disclosure. The total reflection may be caused by the refractive index difference between the optical transmission layer 40 and the optical sheet 70 and the first polarizing plate 51 or may be total reflection through the total reflection coating on the upper and lower surfaces of the optical transmission layer 40. The total reflection due to the difference in refractive index is caused by the fact that light is introduced from the side of the light transmitting layer 40 due to the difference between the refractive index of the light transmitting layer 40 and the refractive index of air and is incident on the interface between the light transmitting layer 40 and air at a specific angle If it can happen. However, in the embodiment of the present invention, when the light is incident at the interface between the fine pattern 41 and the air at a specific angle, the angle formed by the light with the surface of the fine pattern 41 is greater than the total reflection critical angle, .

According to one embodiment of the present disclosure, the light transfer layer 40 may comprise a fine pattern embossed or engraved in the form of a cross-section including one or more curves. The fine pattern including a part of the curve transmits light to one surface of the light transmitting layer when the light reaches. The fine pattern including a part of the curve may be a blade shape as shown in FIG. 5D and may include a part of one or more circles. The fine pattern 417 including a part of the curve may be engraved in the light transmitting layer 40 and may be embossed. And may be formed on the lower portion of the light transmitting layer 40 or on the upper portion of the light transmitting layer 40 as shown in FIG. 5D.

6 is an exemplary view showing another example of a light transmitting layer according to an embodiment of the present disclosure;

The light transfer layer 40 according to one embodiment of the present disclosure may be coated with a total internal reflection coating 42. The remaining portion of the lower surface of the light transmitting layer 40 except for the hole 414 may be coated with the total internal reflection coating agent 42. Therefore, when the light emitted from the light source 30 reaches the upper surface of the light transmitting layer 40, the light can be totally reflected if the incident angle is smaller than the total reflection critical angle. If the totalized light reaches the surface coated with the total reflection coating agent 42 when reaching the lower surface of the light transmission layer 40, the total reflection light can be totally reflected and the hole 414, not the surface coated with the total reflection coating agent 42, The light can be refracted and transmitted to the lower portion due to the refractive index difference between the lower component of the light transmitting layer 40 and the light transmitting layer 40. [

3, when the light incident through the side surface of the light transmitting layer 40 is incident on the interface between the light transmitting layer 40 and the air at an angle of?, The light transmitting layer 40 ) And the interface of the air, the angle at which the light is emitted needs to be 90 degrees or more. In other words, according to Snell's law, the relation of n2sin? At this time, n1 is a value of 1 for the air layer, and n2 is about 1.46 (for example, quartz glass of the optical fiber clad) of the light transmitting layer 40, so that the value of φ is 43.23 degrees or more. Light incident at a value greater than 43.23 may be totally reflected into the interior of the light transmitting layer 40. Light incident at a value less than 43.23 may be transmitted through the light transmitting layer 40 and refracted. The light totally reflected at the first interface maintains the incident angle continuously until reaching the hole 414 corresponding to the fine pattern, so that it can be continuously totally reflected. The description of the angle described above is merely an example, and the present invention is not limited thereto.

7 is an exemplary diagram illustrating the path of light along the location of a fine pattern in accordance with one embodiment of the present disclosure;

According to an embodiment of the present disclosure, the light emitted from the light source 30 has a high probability of passing through the fine pattern 41 closest to the light source 30 to the lower portion of the light transmission layer 40. Accordingly, the density of the fine patterns 41 may be different depending on the distance between the light source 30 and the fine pattern, so as to have a constant brightness depending on the position of the light source 30. As shown in FIG. 6, the pattern 415 near the light source 30 has a smaller density of the fine pattern than the pattern 416 that is relatively far from the light source 30. In this configuration, although the probability that the fine patterns far from the light source 30 reach the distance that the light reaches is reduced, the difference value can be corrected by the density of the fine pattern 41. [ Therefore, it is possible that the liquid crystal display 10 has a uniform luminance due to a change in the density of the fine pattern. Although not shown in FIG. 7, the density of the fine pattern may be designed to be closer to the light source, and the present disclosure may include the same.

According to one embodiment of the present disclosure, the density of the fine patterns 41 may be formed such that they are both symmetrical in the light transmitting layer 40. [ When the light source 30 is disposed on both sides of the light transmitting layer 40 without the side reflecting plate 90, the brightness may be uneven when the fine patterns 415 and 416 are formed at the density as shown in FIG. Therefore, when the light source 30 is disposed on both sides of the light transmitting layer 40, the fine patterns 41 formed on the light transmitting layer 40 can be formed without any rules while maintaining symmetry.

The light emitting unit according to an embodiment of the present disclosure includes a fine pattern 41 on one surface of a light transmitting layer 40 and a light incident from a side surface of the light transmitting layer 40, And one or more light sources 30 disposed in at least one direction of the light transmitting layer 40 and emitting light to the light transmitting layer 40. [ The light emitting unit can transmit the light transmitting layer 40 when the light incident from the light source 30 touches the fine pattern 41 of the light transmitting layer 40. The light emitting unit can serve to supply light to the liquid crystal.

According to one embodiment of the present disclosure, the reflection sheet 60 is disposed under the light transmitting layer 40 to reflect light transmitted through the light transmitting layer in the liquid crystal direction, and to polarize the light first. The first polarizing plate may be excluded from the configuration because light is first polarized and reaches the liquid crystal. With the first polarized light, the reflective sheet 60 can block a part of the light or change the vibration direction of the wave of the light. Further, the reflection sheet 60 can separate the P wave and the S wave of the light so that only a desired waveform is reflected. Accordingly, the reflective sheet 60 may substantially serve as the first polarizer 51.

The description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features presented herein.

Claims (14)

As a liquid crystal display device,
Liquid crystal;
At least one light source disposed in at least one direction of the light transmission layer disposed under the liquid crystal and emitting light to the light transmission layer;
A light transmitting layer disposed at a lower portion of the liquid crystal and including a fine pattern for refracting light incident from the light source in a direction of a reflective sheet and refracting light incident from the light source toward the reflective sheet;
A reflective sheet disposed below the light transmission layer and reflecting the light transmitted through the light transmission layer in the liquid crystal direction;
At least one optical sheet disposed between the light transmission layer and the reflection sheet to adjust an angle of light incident on the reflection sheet so that light reflected by the reflection sheet can exit without being totally reflected by the light transmission layer;
A first polarizer disposed between the lower portion of the liquid crystal and the upper portion of the optical transmission layer to polarize light introduced from the optical transmission layer; And
A second polarizer disposed on the liquid crystal to block at least part of the light transmitted through the liquid crystal;
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Liquid crystal display device.
delete delete The method according to claim 1,
A side reflector disposed in the other direction opposing at least one direction of the light transmission layer in which the light source is disposed and reflecting light output to the other direction of the light source of the light transmission layer into the light transmission layer;
Further comprising
Liquid crystal display device.
The method according to claim 1,
The fine pattern
A fine pattern having a cross-section in the form of a polygon embossed or engraved,
A fine pattern whose cross section is embossed or engraved in a circular shape, or
Wherein the cross-section is a fine pattern embossed or engraved in a form including at least one curve,
Liquid crystal display device.
The method according to claim 1,
The fine pattern
The density of the fine pattern is formed to be different according to the distance between the light source and the fine pattern so that the light incident from the light source is uniformly transmitted to the upper surface of the light transmitting layer
Liquid crystal display device.
The method according to claim 1,
The light-
Wherein at least a portion of the lower portion of the light transmission layer has a total reflection coating, and the remaining portion where the total reflection coating is not disposed has a fine pattern,
Liquid crystal display device.
delete delete The method according to claim 1,
A first electrode disposed on one surface of the first polarizer;
The liquid crystal display device further comprising:
11. The method of claim 10,
A second electrode disposed on one surface of the second polarizer;
The liquid crystal display device further comprising:
The method according to claim 1,
A protective member disposed on the second polarizer plate to protect the lower components;
The liquid crystal display device further comprising:
A light emitting unit capable of supplying light to a panel of a liquid crystal display device,
At least one light source disposed in at least one direction of the light transmission layer and emitting light to the light transmission layer;
A light transmission layer including a fine pattern for refracting the light incident from the light source toward the reflection sheet and refracting the light incident from the light source toward the reflection sheet;
A reflective sheet disposed below the light transmission layer and reflecting light transmitted through the light transmission layer in a liquid crystal direction; And
At least one optical sheet disposed between the light transmission layer and the reflection sheet to adjust an angle of light incident on the reflection sheet so that light reflected by the reflection sheet can exit without being totally reflected by the light transmission layer;
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Emitting unit.
As a liquid crystal display device,
Liquid crystal;
At least one light source disposed in at least one direction of the light transmission layer disposed under the liquid crystal and emitting light to the light transmission layer;
A light transmitting layer disposed at a lower portion of the liquid crystal and including a fine pattern for refracting light incident from the light source in a direction of a reflective sheet and refracting light incident from the light source toward the reflective sheet;
A second polarizer disposed on the liquid crystal to block at least part of the light transmitted through the liquid crystal;
A reflective sheet disposed on the lower portion of the light transmission layer to reflect light transmitted through the light transmission layer in the liquid crystal direction and to polarize light first; And
At least one optical sheet disposed between the light transmission layer and the reflection sheet to adjust an angle of light incident on the reflection sheet so that light reflected by the reflection sheet can exit without being totally reflected by the light transmission layer;
/ RTI >
Liquid crystal display device.

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