KR20190138298A - Backlight unit and display device including the same - Google Patents

Abstract

The present invention relates to a backlight unit and a display device including the same. According to an aspect of the present invention, the backlight unit comprises: a light source; a light guide plate having the light source arranged on a side part thereof; and an optical modulation reflection film arranged in a lower part of the light guide plate. The optical modulation reflection film includes: a first base film; a quantum dot film arranged to be in contact with a lower part of the first base film and including a quantum dot; a reflection film including a diffusion reflection material; and a second base film arranged to be in contact with a lower part of the reflection film. The reflection film including the diffusion reflection material is arranged to be in contact with the quantum dot film.

Description

BACKLIGHT UNIT AND DISPLAY DEVICE INCLUDING THE SAME}

The present application relates to a backlight unit and a display device including the same, and more particularly, to a backlight unit including a quantum dot film disposed under a light guide plate and a display device including the same.

A quantum dot is a semiconductor material having a crystal structure of several nanometers in size and exhibits properties between a bulk semiconductor and discontinuous molecules of the same material. Quantum dots have received great attention as new physical property control methods and materials because quantum confinement effects and large surface-to-volume ratios allow the physical, chemical, and electrical properties to be controlled by varying the size of the same material. .

The quantum dot is carried in a resin in the form of a film is implemented as a quantum dot film, it is used.

The quantum dot film may be included in a backlight unit and included in a display device such as a display. In order to facilitate the provision of the backlight unit, there is an increasing demand for a backlight unit that is easy to be disposed in a display device.

In addition, the conventional quantum dot film has a problem that the light efficiency of the quantum dot film is reduced over time. Therefore, the demand for quantum dot film having improved phase stability and thermal stability has been increasing to maintain the light efficiency at the time of implementation even in recent years.

An object of the present application is to provide a backlight unit that is easy to arrange in a display device.

Another object of the present application is to provide a backlight unit including a quantum dot film having improved image stability and thermal stability.

The problem to be solved by the present application is not limited to the above-described problem, and the tasks not mentioned will be clearly understood by those skilled in the art from the present specification and the accompanying drawings. .

According to an aspect of the present application, the light source; A light guide plate on which the light source is disposed; And a light modulating reflection film disposed under the light guide plate, wherein the light modulation reflection film comprises: a first base film; A quantum dot film disposed to be in contact with a lower portion of the first base film and including a quantum dot; Reflective film comprising a diffuse reflecting material; And a second base film disposed to contact the lower portion of the reflective film, wherein the reflective film including the diffuse reflection material is disposed to contact the quantum dot film.

According to another aspect of the present application, the bottom cover; A support main fastened to the bottom cover; A backlight unit disposed between the bottom cover and the support main; And a backlight unit disposed above the support main, wherein the backlight unit comprises: a light source; A light guide plate on which the light source is disposed; And a light modulating reflection film disposed under the light guide plate, wherein the light modulation reflection film comprises: a first base film; A quantum dot film disposed to be in contact with a lower portion of the first base film and including a quantum dot; Reflective film comprising a diffuse reflecting material; And a second base film disposed to contact the lower portion of the reflective film, wherein the reflective film including the diffuse reflection material is disposed to contact the quantum dot film.

Means for solving the problems of the present application are not limited to the above-described solutions, and the solutions not mentioned will be clearly understood by those skilled in the art from the present specification and the accompanying drawings. Could be.

According to the present application, a backlight unit that can be easily disposed in a display device can be provided.

According to the present application, a backlight unit including a quantum dot film having improved phase stability and thermal stability may be provided.

The effects of the present application are not limited to the above-described effects, and effects that are not mentioned will be clearly understood by those skilled in the art from the present specification and the accompanying drawings.

1 is an exploded perspective view of a backlight unit and a display device including the same according to an exemplary embodiment of the present application.
2 is a side view illustrating a backlight unit, a support main, and a bottom cover according to an exemplary embodiment of the present application.
3 is a view showing a quantum dot film according to an embodiment of the present application.
4 is a diagram illustrating an organism according to an embodiment of the present application.
5 is a view showing an inorganic body according to an embodiment of the present application.
6 is a diagram illustrating a quantum dot according to an embodiment of the present application.
7 is a schematic view showing a chain molecule according to an embodiment of the present application.
8 illustrates a bead according to an embodiment of the present application.
9 is a diagram illustrating quantum dots, chain molecules, and beads according to an embodiment of the present application.
10 is a diagram illustrating an organism, an inorganic body, and a quantum dot powder according to an embodiment of the present application.
11 is a view showing a quantum dot film actually implemented according to an embodiment of the present application.
12 is a view showing a quantum dot film having a network structure according to an embodiment of the present application.
13 is a view showing the configuration of a quantum dot film according to an embodiment of the present application.
14 is a view showing an inorganic body attached to a ligand of a quantum dot according to an embodiment of the present application.
15 is a view illustrating an inorganic body attached to a surface of a quantum dot according to an embodiment of the present application.
16 is a view showing an inorganic body attached to a bead according to an embodiment of the present application.
17 is a side view illustrating a backlight unit, a support main, and a bottom cover according to an embodiment of the present application.
18 is a side view illustrating a backlight unit, a support main, and a bottom cover according to an embodiment of the present application.
19 is a view showing a quantum dot film disposed in a dot shape according to an embodiment of the present application.
20 is a diagram illustrating a display device according to an exemplary embodiment of the present application.
21 is a side view illustrating a backlight unit, a support main, and a bottom cover according to an embodiment of the present application.
22 is a side view illustrating a backlight unit, a support main, and a bottom cover according to an exemplary embodiment of the present application.
23 is a view showing the light output of the backlight unit according to an embodiment of the present application.
24 is a diagram illustrating a direct type display device according to an embodiment of the present application.
25 is a view illustrating a light unit, a reflector, and a quantum dot film according to an embodiment of the present application.
FIG. 26 is a side view illustrating a direct backlight unit, a support main, and a bottom cover according to an embodiment of the present application. FIG.
27 is a side view illustrating a direct backlight unit, a support main, and a bottom cover according to an embodiment of the present application.

Since the embodiments described herein are intended to clearly explain the spirit of the present invention to those skilled in the art, the present invention is not limited to the embodiments described herein, and the present invention. The scope of should be construed to include modifications or variations without departing from the spirit of the invention.

The terminology used herein is a general term that has been widely used as far as possible in view of the functions of the present invention, but may vary according to the intention of a person of ordinary skill in the art to which the present invention belongs, custom or the emergence of a new technology. Can be. In contrast, when a specific term is defined and used in any meaning, the meaning of the term will be described separately. Therefore, the terms used in the present specification should be interpreted based on the actual meanings of the terms and the contents throughout the present specification, rather than simple names of the terms.

BRIEF DESCRIPTION OF THE DRAWINGS The drawings attached to the present specification are provided to easily explain the present invention, and the shapes shown in the drawings may be exaggerated and displayed as necessary to help understanding of the present invention, and thus the present invention is not limited to the drawings.

In the present specification, when it is determined that a detailed description of a known configuration or function related to the present invention may obscure the gist of the present invention, a detailed description thereof will be omitted as necessary.

According to an aspect of the present application, the light source; A light guide plate on which the light source is disposed; And a light modulating reflection film disposed under the light guide plate, wherein the light modulation reflection film comprises: a first base film; A quantum dot film disposed to be in contact with a lower portion of the first base film and including a quantum dot; Reflective film comprising a diffuse reflecting material; And a second base film disposed to contact the lower portion of the reflective film, wherein the reflective film including the diffuse reflection material is disposed to contact the quantum dot film.

In addition, the first base film and the second base film may be provided with a backlight unit, characterized in that it comprises polyethylene terephthalate (PET).

In addition, an air gap may be formed between the first base film and the light guide plate, and an upper surface of the first base film may be exposed to the air gap.

In addition, a backlight unit may be provided, wherein an upper surface of the first base film is in contact with a lower surface of the light guide plate, and a lower surface of the first base film is in contact with the quantum dot film.

In addition, light output from the light source is applied to the light guide plate, and the first light applied to the quantum dot film is transmitted through the first base film from the light guide plate, and the second light is directed from the quantum dot film toward the light guide plate. The second light is transmitted through the first base film, it may be provided with a backlight unit.

In addition, a backlight unit may be provided, wherein the third light is output from the quantum dot film and applied to the reflective film, and the fourth light is output from the reflective film.

In addition, a backlight unit may be provided based on the fourth light, wherein a backlight is output from the light guide plate.

The quantum dot film may include an organism, an inorganic body disposed to contact the organism, and a quantum dot powder adjacent to the inorganic body, wherein the quantum dot powder includes a quantum core, a quantum shell surrounding the quantum core, and a ligand formed on the surface of the quantum shell. It includes a plurality of quantum dots, including chain molecules including one end and the other end attached to the quantum dots, and beads positioned between the other end of the plurality of chain molecules, the inorganic body is characterized in that in contact with the chain molecules The backlight unit may be provided.

The quantum dot may include the first quantum dot and the second quantum dot disposed at positions adjacent to each other, the chain molecule may include a first chain molecule and a second chain molecule, and the first chain molecule may include the first quantum dot. The second chain molecule is attached to the second quantum dot, and the bead is positioned between the other end of the first chain molecule and the other end of the second chain molecule. Can be.

In addition, the organism comprises a first organism and a second organism, the inorganic body comprises a first inorganic body and a second inorganic body, the organic functional group of the first organism is in contact with the first inorganic body, the second organism The organic functional group of the contact with the second inorganic body, the first inorganic body is in contact with the first chain molecule, the second inorganic body is characterized in that the contact with the first chain molecule, the backlight unit may be provided. have.

In addition, at least one of the organic material, the inorganic material, the quantum dot, the chain molecule, and the beads may be provided in contact with the reflective film.

According to another aspect of the present application, the bottom cover; A support main fastened to the bottom cover; A backlight unit disposed between the bottom cover and the support main; And a backlight unit disposed above the support main, wherein the backlight unit comprises: a light source; A light guide plate on which the light source is disposed; And a light modulating reflection film disposed under the light guide plate, wherein the light modulation reflection film comprises: a first base film; A quantum dot film disposed to be in contact with a lower portion of the first base film and including a quantum dot; Reflective film comprising a diffuse reflecting material; And a second base film disposed to contact the lower portion of the reflective film, wherein the reflective film including the diffuse reflection material is disposed to contact the quantum dot film.

In the present specification, light may be interpreted as electromagnetic waves in all frequency bands. That is, the light of the present specification may be visible light (VL), visible ultraviolet light (Ultra Violet light, UV), or infrared light (InfraRed light, IR). Alternatively, the light of the present specification may be an electromagnetic pile having a wavelength band other than the above-described frequency band.

In the present specification, the meaning of “attaching” one configuration to another configuration should be interpreted to mean that the entire area (all areas) or some areas (one area) of one configuration are in contact with the other configuration. In addition, the meaning of "attachment" is to be interpreted in a broad sense including the meaning of being in contact, as well as the meaning of being firmly fixed in contact. That is, when the one configuration is attached to the other configuration, it can be separated from the other configuration by a predetermined external force.

In the present specification, the term “end” of one configuration may be defined as a portion at one end of one configuration when the configuration extends in one direction.

In the present specification, unless otherwise specified, light efficiency is light scattering in which light is detected at various positions around the quantum dot, based on the amount of photons emitted (or light intensity) to the amount of photons applied to the quantum dots (or light intensity). When light from the quantum dots is measured, it should be interpreted in a broad sense including the intensity of light in a specific wavelength band.

In this specification, terms such as first, second, third, and fourth are used to describe one configuration of the quantum dot film light source unit, but each of these configurations should not be limited by the terms. That is, the following first to fourth descriptions should be interpreted as descriptions for distinguishing a plurality of configurations.

In the present specification, a predetermined light may be applied to one configuration, and the one configuration may output predetermined light. In this case, the lights may be different from each other. Each of the lights may have different characteristics such as a path, a wavelength, and a frequency. Therefore, when the first light is applied in another configuration and the second light is output based on the first light applied in the other configuration, the first light and the second light may be different. However, hereinafter, unless otherwise specified, the first light and the second light will be uniformly described as light to light for easy explanation.

Hereinafter, a backlight unit and a display device including the backlight unit according to an exemplary embodiment of the present application will be described.

<First Embodiment>

The first embodiment will be described below.

1 is an exploded perspective view of a backlight unit 10 and a display device 1 including the same according to an exemplary embodiment of the present application.

Referring to FIG. 1, the display device 1 includes a backlight unit 10, a bottom cover 20, an optical sheet 30, a support main 40, a display panel 50, and a printed circuit board. , 60), FPC (Flexible Printed Circuit) 61, and top cover 70, wherein the backlight unit 10 includes a light unit 100, a light guide plate 200, a quantum dot film 400, and a reflecting plate ( 300, and the light unit 100 may include a light source 110 and a light driver 120. However, the configurations shown in FIG. 1 are not essential, and the display device 1 having more or less than the configuration shown in FIG. 1 may be implemented.

The backlight unit 10 may emit a backlight. The backlight may be implemented by the backlight unit 10. The backlight may be defined as light emitted from the light guide plate 200 of the backlight unit 10 in the upper direction, the optical sheet 30 direction, and the display panel 50 direction. The backlight may be white light.

The bottom cover 20 may support the backlight unit 10.

The optical sheet 30 may transfer the applied backlight to the display panel 50.

The support main 40 may be fastened to the bottom cover 20 to support the backlight unit 10 and the optical sheet 30.

The display panel 50 may implement the backlight as light having a predetermined color.

The printed circuit board 60 may generate a driving signal for driving the display panel 50.

The FPC 61 may receive the driving signal and transmit the driving signal to the display panel 50.

The top cover 70 may cover the display panel 50.

Hereinafter, each structure is demonstrated concretely.

First, the bottom cover 20 will be described.

The bottom cover 20 may have a predetermined external shape. The bottom cover 20 may have a shape in which an upper surface thereof is opened to expose a bottom surface thereof.

The bottom cover 20 may support and accommodate each component of the display device 1. The bottom cover 20 may support each component of the display device 1 through the exposed bottom surface. The backlight unit 10 may be in contact with and supported on the exposed bottom surface of the bottom cover 20.

The bottom cover 20 may be fastened to a predetermined configuration. The bottom cover 20 may be fastened to the support main 40. The space defined between the bottom cover 20 and the support main 40 coupled to each other may include a configuration of the display device 1. The space may include the backlight unit 10 and the optical sheet 30.

Hereinafter, the backlight unit 10 will be described.

The backlight unit 10 may generate a backlight.

Hereinafter, each configuration of the backlight unit 10 will be described.

First, the light unit 100 will be described.

The light unit 100 may provide light to each component of the backlight unit 10. The light may be light of a blue wavelength band.

The light source 110 of the light unit 100 may generate and emit light. The light source 110 may emit the light toward the light guide plate 200. The light source 110 may apply the light to the light guide plate 200. The light source 110 may include a visible light LED or an infrared LED.

The light driver 120 of the light unit 100 may apply a predetermined control signal to the light source 110 so that the light source 110 may emit light.

The light unit 100 may be disposed on the side of the light guide plate 200. The light unit 100 may be disposed adjacent to one region of the side of the light guide plate 200, or may be disposed adjacent to the entire region of the side.

Hereinafter, the light guide plate 200 will be described.

The light guide plate 200 may change the path of the applied light. The change of the path of the light may be based on scattering, diffusion, or the like by the light guide plate 200.

The light guide plate 200 may receive the light and output predetermined light in various directions. The light guide plate 200 may receive the light and scatter the light in various directions. The various directions include a lower direction such as a quantum dot film 400, a reflective plate 300, a bottom cover 20, an optical sheet 30 direction, a support main 40 direction, a display panel 50 direction, and a top cover ( 70) may be included in an upward direction.

The light guide plate 200 may scatter light applied to each area of the light guide plate 200 in various directions. The light guide plate 200 may scatter the light in a first direction in a first region and scatter the light in a second direction in a second region. The light guide plate 200 may convert the applied light into area light and emit the light based on the scattering.

The light guide plate 200 may receive the light and output the light in a specific direction. The specific direction may be a lower direction such as a quantum dot film 400 direction, a reflector 300 direction, or a bottom cover 20 direction. The light guide plate 200 may direct the path of the light downward. The light guide plate 200 may scatter the light in a downward direction or may reflect the light in a downward direction in a specific region of the light guide plate 200. The specific area may be an area of the upper surface of the light guide plate 200.

The light guide plate 200 may be formed of a material capable of changing the light path. The material may include a polymethyl methacrylate (PMMA) -based resin, an olefin-based resin (COC), and the like.

Meanwhile, a predetermined optical pattern may be formed on the light guide plate 200. The optical pattern may be defined as a pattern formed on the light guide plate 200 by a predetermined processing method to improve luminance of the display device 1.

Hereinafter, the quantum dot film 400 will be described.

The quantum dot film 400 may receive light from the light guide plate 200. The quantum dot film 400 may receive light output downward from the light guide plate 200.

The quantum dot film 400 may modulate light. The quantum dot film 400 may output modulated light. The modulated light may be defined as light having a different optical characteristic from the light applied to the quantum dot film 400. The optical characteristic may be intensity for each wavelength. The modulated light may be white light.

The quantum dot film 400 may generate the modulated light based on the quantum dots included in the quantum dot film 400. The quantum dot may receive light and output light of a specific wavelength band.

The quantum dot film 400 may output the modulated light. The modulated light may be output from the quantum dot film 400 in a lower direction such as a direction of the reflector plate 300. Alternatively, the modulated light may be output from the quantum dot film 400 in an upper direction such as the light guide plate direction 200.

Hereinafter, unless otherwise stated, the modulated light is described as light.

Hereinafter, the reflective plate 300 will be described.

The reflector 300 may reflect the applied light.

The reflector 300 may receive light from the quantum dot film 400. The reflective plate 300 may receive light output from the quantum dot film 400 in a downward direction.

The reflector 300 may reflect the light such that light incident on the reflector 300 is output in an upper direction such as a quantum dot film 400 direction, a light guide plate 200 direction, or a display panel 50 direction. .

The backlight unit 10 has been described above.

Hereinafter, the optical sheet 30 will be described.

The optical sheet 30 may diffuse and condense the applied light and transmit the light to the display panel 50. The light may be light or a backlight.

The optical sheet 30 may include a light diffusion film, a prism sheet, a diffusion sheet, and the like.

Hereinafter, the support main 40 will be described.

The support main 40 may support the backlight unit 10 and the optical sheet 30.

The support main 40 may be fastened to the bottom cover 20. The backlight unit 10 and the optical sheet 30 may be included in a space between the support main 40 and the bottom cover 20 fastened.

Hereinafter, the display panel 50, the printed circuit board 60, and the FPC 61 will be described.

The display panel 50 may change an optical property of the backlight. The display panel 50 may change an optical property of the backlight based on the polarization structure.

The display panel 50 may include liquid crystal. The liquid crystal of the display panel 50 may have a predetermined polarization structure. The polarization structure of the liquid crystal may be formed by applying electrical energy to the liquid crystal. By applying the liquid crystal control signal to the display panel 50, the plurality of liquid crystals included in the display panel 50 may be arranged in a predetermined direction, respectively. The polarization structure may be defined by the arranged liquid crystals.

The printed circuit board 60 may generate the liquid crystal control signal.

The FPC 61 may transmit the generated liquid crystal control signal to the display panel 50.

The liquid crystal control signal generated by the printed circuit board 60 is transmitted to the display panel 50 by the FPC 61, so that the display panel 50 may have a predetermined polarization structure. Based on the polarization structure of the display panel 50, the backlight may be converted into light having a predetermined color and output.

In the above, each structure of the display apparatus 1 was demonstrated.

Hereinafter, the positional relationship of each structure of the display apparatus 1 is demonstrated.

2 is a side view illustrating the backlight unit 10, the support main 40, and the bottom cover 20 according to the exemplary embodiment of the present application.

A description with reference to FIG. 2 is as follows.

The reflector 300 may be disposed on the bottom cover 20. The reflective plate 300 may include a first base film 310, a reflective film 330, and a second base film 350. The reflective film 330 may be disposed between the first base film 310 and the second base film 350, and the second base film 350 may be disposed on the bottom comb 20. .

The quantum dot film 400 may be disposed on the reflective plate 300.

The quantum dot film 400 may be disposed under the light guide plate 200.

The light source 110 and the light driver 120 may be disposed at the side of the light guide plate 200. The light driver 120 may be in contact with an inner surface of the side portion of the bottom cover 20. The light driver 120 may be in contact with the side of the reflector 300 and the side of the quantum dot film 400.

The support main 40 may be fastened to an upper portion of the bottom cover 20.

The light guide plate 200 may be exposed in the direction of the optical sheet 30 through the support main 40.

Hereinafter, the positional relationship between the quantum dot film 400 and the light guide plate 200 will be described in detail.

The quantum dot film 400 may be spaced apart from the light guide plate 200 and disposed below the light guide plate 200.

A predetermined interval exists between the quantum dot film 400 and the light guide plate 200. The gap may be defined as an air gap 500. The quantum dot film 400 may be spaced apart from the light guide plate 200 by the air gap 500 and disposed below the light guide plate 200.

An upper portion of the quantum dot film 400 may be exposed to the air gap 500.

The side portion of the quantum dot film 400 may be in contact with the light driver 120.

When the air gap 500 is formed between the light guide plate 200 of the quantum dot film 400, the color reproducibility of the display device 1 may be increased. A predetermined layer such as a barrier film formed of an organic inorganic compound such as Al ₂ O ₃ , SiO _x , and SiNx (where x is 1-3) between the quantum dot film 400 and the light guide plate 200. This can be located. In this case, the backlight output from the quantum dot film 400 may be distorted and disturbed by the predetermined layer. The light conversion rate of the display panel 50 based on the backlight may be reduced. On the contrary, when the air gap 500 is formed, light output from the quantum dot film 400 may be transmitted to the display panel 50 without interference when the air gap 500 is not formed. Accordingly, the light conversion rate of the display panel 50 is increased, so that the color reproducibility of the display device 1 may be increased.

Hereinafter, the positional relationship between the quantum dot film 400 and the reflective plate 300 will be described in detail.

The quantum dot film 400 may be disposed to contact the reflective plate 300. The quantum dot film 400 may cover the upper surface of the reflecting plate 300.

The reflective plate 300 may include a base film and a reflective film 330, and the base film may include a first base film 310 and a second base film 350. However, the configuration of the reflecting plate 300 is not an essential configuration, the reflecting plate 300 having more or less than the configuration can be implemented.

The first base film 310 and the second base film 350 may define an external shape of the reflecting plate 300. The first base film 310 and the second base film 350 may maintain an external shape of the reflector plate 300.

The first base film 310 and the second base film 350 may prevent damage of the reflective film 330.

The first base film 310 and the second base film 350 may be implemented as a material for preventing damage. The material may be a material of polyethylene terephthalate (PET).

The reflective film 330 may be applied to reflect the backlight.

The reflective film 330 may have excellent total reflectivity and diffuse reflectivity.

The reflective film 330 may be a reflective film in the form of a diffuse reflection film, a mirror reflection film, or a combination thereof.

The reflective film 330 may include a predetermined reflective material. When the reflective film 330 is implemented as a diffuse reflection film, the reflective film 330 may include a diffuse reflection material. The diffuse reflection material may include barium sulfate (Ba 2 SO 4). When the reflective film 330 is implemented as a mirror reflective film, the reflective film 330 may include a mirror reflective material. The mirror reflective material may include an aluminum (Al) -based or silver (Ag) -based material. When the reflective film 330 is implemented in a combination thereof, the reflective film 330 may include at least one or more of the above materials.

Hereinafter, the arrangement relationship of each said structure is demonstrated.

The quantum dot film 400 may cover the upper surface of the first base film 310.

The quantum dot film 400 may be in contact with the first base film 310. The lower surface of the quantum dot film 400 may be in contact with the upper surface of the first base film 310. The quantum dot film 400 may contact the PET material included in the first base film 310.

The first base film 310 may contact the reflective film 330. The lower surface of the first base film 310 may be in contact with the upper surface of the reflective film 330. The first base film 310 may contact the diffuse reflection material of the reflective film 330.

The reflective film 330 may be disposed between the first base film 310 and the second base film 350. An external shape of the reflective film 330 may be maintained by the first base film 310 and the second base film 350.

The reflective film 330 may be in contact with the first base film 310 and the second base film 350. An upper surface of the reflective film 330 may contact the lower surface of the first base film 310, and a lower surface of the reflective film 330 may contact the upper surface of the second base film 350. have. The reflective film 330 may be in contact with the PET material of the first base film 310 and the PET material of the second base film 350.

The second base pillar 350 may be in contact with the bottom cover 20. The lower surface of the second base film 350 may contact the exposed bottom surface of the bottom cover 20.

At least one side of the quantum dot film 400, the first base film 310, the reflective film 330, or the second base film 350 may be disposed in contact with the light driving unit 120.

Alternatively, side portions of the quantum dot film 400, the first base film 310, the reflective film 330, and the second base film 350 may not be in contact with the light driver 120.

When the quantum dot film 400 is formed in contact with the first base film 310 of the reflective plate 300, the quantum dot film 400 may have improved bonding strength with the reflective plate 300. When the first base film 310 is not implemented on the reflective plate 300, the quantum dot film 400 may not be disposed in contact with the reflective film 330 of the reflective plate 300. The quantum dot film 400 includes a material having a low bonding strength with a material included in the reflective film 330. Therefore, the bonding force between the quantum dot film 400 and the reflective plate 300 is weak, and when an external force is applied to the display device 1, the quantum dot film 400 may be easily separated from the reflective plate 300. On the contrary, when the first base film 310 is implemented on the reflective plate 300, the quantum dot film 400 may be in contact with the first base film 310. Since the first base film 310 and the quantum dot film 400 include a predetermined inorganic body, the interlayer bonding strength may be strong. Even when an external force is applied to the display device 1, the quantum dot film 400 may be firmly coupled to the reflective plate 300.

As a result, the light output from the light source 110 may be scattered in the light guide plate 200 and applied to the quantum dot film 400. The quantum dot film 400 may receive light and output light having different characteristics from the applied light in a downward direction.

 Alternatively, the quantum dot film 400 may allow the modulated light to be output upward. The reflective plate 300 may reflect the converted light emitted in the downward direction upward, thereby transmitting the backlight to the light guide plate 200, the optical sheet 30, or the display panel 50.

In this case, the quantum dot film 400 may convert the applied light to emit the backlight upward. The light guide plate 200 may receive a backlight output from the quantum dot film 400 and a backlight output from the reflective plate 300.

Even if a predetermined barrier film is not further disposed on the quantum dot film 400, the quantum dot film 400 has high thermal stability and phase stability.

Hereinafter, the quantum dot film 400 will be described in detail.

<Example 1-1>

Hereinafter, the first-first embodiment of the quantum dot film 400 will be described.

3 is a view showing a quantum dot film 400 according to an embodiment of the present application.

The quantum dot film 400 may receive light from the light source 110 to output light of a specific wavelength band.

The quantum dot film 400 may be implemented in a film shape having a predetermined thickness. Alternatively, the quantum dot film 400 may be provided in a predetermined configuration. The quantum dot film 400 may be provided in a form disposed on a predetermined substrate. The substrate may be an optical member used for the display device 1 such as a display and an illumination.

Hereinafter, the configuration of the quantum dot film 400 will be described.

Referring to FIG. 3, the quantum dot film 400 may include an inorganic body 430, an organic 410, and a quantum dot powder 401 including a quantum dot 450, a bead 500, and a chain molecule 470. Can be. However, the configurations shown in FIG. 3 are not essential, and a quantum dot film 400 having more configurations may be implemented.

The inorganic body 430 may be in contact with the organism 410.

The quantum dot powder 401 may be adjacent to the inorganic body 430. Each component of the quantum dot powder 401 may be located between the inorganic body 430 and the organic body 410. The quantum dot 450 of the quantum dot powder 401 may receive a predetermined light to output light of a specific wavelength band. Chain molecules 470 of the quantum dot powder 401 may be attached to the quantum dot 450 so that the distance between the adjacent quantum dots 450 is spaced apart. The beads 500 of the quantum dot powder 401 may be disposed between the chain molecules 470.

Hereinafter, each configuration of the quantum dot film 400 will be described in detail.

First, the organism 410 will be described.

4 is a diagram illustrating an organism according to an embodiment of the present application.

The organism 410 may include a triazine compound and a silane compound.

The triazine-based compound may include a 1,3,5-triazine-based compound, a 1,2,3-triazine-based compound, and a 1,2,4-triazine-based compound. The 1,3,5-triazine compound is 2,2 ', 2 "-(1,3,5-triazine-2,4,6-trilyl) tris (methylazandidi) tris (ethane-2) , 1-diyl) tris (3- (triethoxysilyl) propylcarbamate); 2,2 ', 2 "-(1,3,5-triazine-2,4,6-trilyl) tris Turfyl) tris (ethane-2,1-diyl) tris (3- (triethoxysilyl) propylcarbamate); 4,4 ', 4 "-(1,3,5-triazine-2,4,6-trilyl) tris (azandiyl) tris (benzene-4,1-diyl) tris (3- (trie Oxysilyl) propylcarbamate); and 4,4 ', 4 "-(1,3,5-triazine-2,4,6-trilyl) tris (hexylazandiyl) tris (benzene-4,1 -Diyl) tris (3- (triethoxysilyl) propylcarbamate); and the like.

The silane compound is ethoxysilane, diethoxysilane, ethoxytrimethylsilane, diethoxydimethylsilane, methyltriethoxysilane, tetraethoxysilane, diethoxydimethoxysilane, ethoxytrimethoxysilane, chlorotri Ethoxysilane, trichloromethylsilane, dichlorosilane, trichlorosilane, dichlorodimethylsilane, vinyldimethyldimethoxysilane, 2- (acrylic) ethyl trimethoxysilane, 2- (methacryl) ethyl trimethoxysilane, 2 -(Acryloxy) ethyl trimethoxysilane, 2- (methacryloxy) ethyl trimethoxysilane, and 3- (glycidoxy) propyl trimethoxysilane (GPTMS).

When the quantum dot film 400 includes an organism 410 including the silane compound, the quantum dot film 400 may have higher hardness and flexibility.

The organism 410 may include a predetermined region.

Referring to FIG. 4, the organism 410 may include an organic functional group 420 including an organic core group 415, a first organic functional group 421, and a second organic functional group 423.

The organic core group 415 may support the organic functional group 420.

The organic functional group 420 may be formed to extend outward from the organic central group 415. The organic functional group 420 may be in contact with the organic central group 415 and may extend in the direction of the inorganic body 430.

 The organic functional group 420 may include one end and the other end. One end of the organic functional group 420 may be in contact with the organic core 415, and the other end of the organic functional group 420 may be defined as an end extending outward from the one end.

The organic core group 415 and the organic functional group 420 may have different chemical properties. The different chemical properties may be based on elements included in the organic core group 415 and the organic functional group 420.

The organic core group 415 may include a nitrogen atom (N), a carbon atom (C), or a hydrogen atom (H).

The organic functional group 420 may include a halogen atom, a hydrogen atom (H), a silicon atom (Si), an alkyl group having 1 to 6 carbon atoms (R), an alkylene group having 1 to 6 carbon atoms, or a phenylene group.

The organic functional group 420 may include the same element for each organic functional group 420. Alternatively, the organic functional group 420 may include different elements for each organic functional group 420. Elements included in the first organic functional group 421 and the second organic functional group 423 may be different from each other. Carbon number included in the first organic functional group 421 and carbon number included in the second organic functional group 423 may be different.

The physical structure of the organism 410 may be defined by the organic functional group 420.

The organic functional group 420 may have a physical length.

The organic functional group 420 may have various physical sizes based on the elements included in the organic functional group 420. The number of elements included in the organic functional group 420 and the physical size of the organic functional group 420 may be proportional to each other. For example, the physical length of the organic functional group 420 may be extended in proportion to the number of carbons included in the organic functional group 420.

The organic functional group 420 may have a similar or the same physical size for each organic functional group 420.

Alternatively, the organic functional group 420 may have a different physical size for each organic functional group 420. The first organic functional group 421 has a first length based on the carbon number of the first organic functional group 421, and the second organic functional group 423 is based on the carbon number of the second organic functional group 423. It may have a second length.

Hereinafter, the inorganic body 430 will be described.

5 is a view showing an inorganic body according to an embodiment of the present application.

The inorganic body 430 may include a predetermined inorganic material.

The inorganic material may be aluminum methoxide, aluminum tetramethoxide, aluminum ethoxide, aluminum propoxide, aluminum butoxide, monoethoxysilane, methyltriethoxysilane, dimethyldiethoxysilane, diphenyldiethoxysilane, trie Methoxysilane, tetramethoxysilane, tetraethoxysilane, titanium tetramethoxide, titanium tetraethoxide, titanium tetrapropoxide, titanium tetrabutoxide, zirconium tetramethoxide, zirconium tetramethoxide, zirconium tetraethoxide , Zirconium tetrapropoxide, or zirconium tetrabutoxide.

The inorganic body 430 may include a predetermined area.

Referring to FIG. 5, the inorganic body 430 may include an inorganic functional group 440 including an inorganic core 435, a first inorganic functional group 441, and a second inorganic functional group 443. However, the configuration shown in FIG. 5 is not essential, and an inorganic body 430 having more configurations than that described above may be implemented. For example, the inorganic body 430 may be implemented with an inorganic body 430 including four inorganic functional groups 440.

The inorganic core 435 may support the inorganic functional group 440.

The inorganic functional group 440 may be formed to extend outward from the inorganic central group 435. The inorganic functional group 440 may be formed to be in contact with the inorganic central group 435 and extend in the direction of the chain molecule 500.

The inorganic functional group 440 may include one end and the other end. One end of the inorganic functional group 440 may be a part in contact with the inorganic core 435, and the other end of the inorganic functional group 440 may be defined as an end portion extending outward from the one end.

The inorganic core group 435 and the inorganic functional group 440 may have different chemical properties. The different chemical properties may be based on elements included in the inorganic core group 435 and the inorganic functional group 440.

The inorganic core 435 may include one or more inorganic elements selected from the group consisting of groups 3A, 4A, and 4B on the periodic table.

The inorganic functional group 440 may include a hydrogen atom, a hydroxyl group, an alkyl group having 1 to 6 carbon atoms, an alkoxy group having 1 to 6 carbon atoms, a phenyl group or a xylyl group.

The inorganic functional group 440 may include the same elements for each inorganic functional group 440.

Alternatively, the inorganic functional group 440 may include different elements for each inorganic functional group 440. Elements included in the first inorganic functional group 441 and the second inorganic functional group 443 may be different from each other. The carbon number included in the first inorganic functional group 441 and the carbon number included in the second inorganic functional group 443 may be different.

The physical structure of the inorganic body 430 may be defined by the inorganic functional group 440.

The inorganic functional group 440 may have a physical length.

The inorganic functional group 440 may have various physical sizes based on the elements included in the inorganic functional group 440. The number of elements included in the inorganic functional group 440 and the physical size of the inorganic functional group 440 may be proportional to each other. For example, the physical length of the inorganic functional group 440 may be extended in proportion to the number of carbons contained in the inorganic functional group 440.

The inorganic functional group 440 may have a similar or the same physical size to each inorganic functional group 440.

Alternatively, the inorganic functional group 440 may have a different physical size for each inorganic functional group 440. The first inorganic functional group 441 has a first length based on the carbon number of the first inorganic functional group 441, and the second inorganic functional group 443 is based on the carbon number of the second inorganic functional group 443. It may have a second length.

The organic 410 and the inorganic 430 have been described above.

Hereinafter, the quantum dot powder 401 adjacent to the organic 410 and the inorganic 430 will be described.

First, the quantum dot 450 will be described.

6 is a diagram illustrating a quantum dot according to an embodiment of the present application.

A description with reference to FIG. 6 is as follows.

The quantum dot 450 is a nano-sized semiconductor material and has a quantum confinement effect.

Based on the quantum limitation effect, the quantum dot 450 may emit light. When the quantum dot 450 absorbs light from an excitation source and reaches an energy excited state, the quantum dot 450 itself emits energy corresponding to an energy band gap of the quantum dot 450. The quantum dot 450 is applied with a predetermined light to have an active electron (Excitation electron), and the active electron is stabilized to emit energy.

The quantum dot 450 may have various energy band gaps according to the size of the quantum dot 450 or the material composition of the quantum dot 450. The quantum dot 450 may emit light of a specific wavelength band corresponding to the energy band gap. The quantum dot 450 may change the size or material composition of the quantum dot 450 to emit light of the specific wavelength band.

The quantum dot 450 may be implemented with a predetermined compound. The predetermined compound may be at least one compound of Group II-VI compound, Group III-V compound, or Group IV-VI compound.

Group II-VI compounds are binary elements such as CdSe, CdTe, ZnS, ZnSe, ZnTe, ZnO, HgS, HgSe, HgTe, or CdSeS, CdSeTe, CdSTe, ZnSeS, ZnSeTe, ZnSTe, HgSeS, HgSe, Hd, CdZnSe, CdZnTe, CdHgS, CdHgSe, CdHgTe, HgZnS, HbZnSe, etc. have.

The group III-V compound is a binary element such as GaN, GaP, GaAs, GaSb, AlN, AlP, AlAs, AlSb, InN, InP, InAs, InSb or GaNP, GaNAs, GaNSb, GaPAs, GaPSb, AlNP, AlNAs, Ternary compounds such as AlNSb, AlPAs, AlPSb, InNP, InNAs, InNSb, InPAs, InPSb, GaAlNP or GaAlNAs, GaAlNSb, GaAlPAs, GaAlPSb, GaInNP, GaInNAs, GaInNSb, GaInPAs, GaInPSb, InAlNP, InAlNAs, InPANS It may be selected from the group consisting of quaternary compounds.

The IV-VI compound is a binary element such as SnS, SnSe, SnTe, PbS, PbSe, PbTe, or a tri-element compound such as SnSeS, SnSeTe, SnSTe, PbSeS, PbSeTe, PbSTe, SnPbS, SnPbSe, SnPbTe, or SnPbSSe, SnPbSee It may be selected from the group consisting of quaternary compounds such as SnPbSTe.

The Group IV compound may be selected from the group consisting of a single element compound such as Si, Ge, or a binary element such as SiC, SiGe.

The quantum dot 450 may have a core-shell structure.

The quantum dot 450 of the core-shell structure may include a quantum core 310, a quantum shell 330, and a ligand 462.

The quantum core 460 may emit light based on the quantum limiting effect.

The quantum shell 461 may cover the quantum core 460. The quantum shell 461 may protect the quantum core 460. The quantum shell 461 may prevent the energy band of the quantum core 460 from being changed.

The ligand 462 may be formed on the surface of the quantum dot 450.

The quantum core 460 and the quantum shell 461 may be implemented with the above-described compounds.

The ligand 462 may be formed on the surface of the quantum shell 461.

The ligand 462 may be a compound that coordinates by providing a pair of covalent electrons to the quantum dot 450.

The ligand 462 may include i) an organic ligand, ii) an inorganic ligand, or iii) a combination ligand in which the aforementioned ligand is combined.

The organic ligand may be an alkyl chain molecule. The alkyl chain molecule may include at least one of oleic acid (OA), 1,2-ethylenedithiol (EDT), 1,4-butanedithiol (BDT), or 3-mecaptopropionic acid (MPA).

The inorganic ligand may include at least one of an ether compound, an unsaturated hydrocarbon, and an organic acid. The solvent used as the inorganic ligand may include at least one of an ether compound, an unsaturated hydrocarbon, or an organic acid.

The ether compound may include at least one of tri-n-Octylphosphine oxide (TOPO), alkyl phosphine (Alkylphosphine), octyl ethyr (Octyl ether), or benzyl ether (Benzyl ether) have.

The unsaturated hydrocarbons may include at least one of octane or octadecane.

The organic acid may include at least one of oleic acid, stearic acid, myristic acid, or hexadecanoic acid.

Thermal stability may be improved by the ligand 462 included in the above-described quantum dot 450. In addition, the ligand 462 may prevent a plurality of the quantum dots 450 from agglomerating with each other, thereby preventing a decrease in light efficiency.

The ligand 462 may have a predetermined length. The length may be proportional to the number of carbons (C) included in the ligand 462. As the number of carbons (C) included in the ligand 462 increases, the length of the ligand 462 may be longer.

Meanwhile, the configurations illustrated in FIG. 6 are not essential, and a quantum dot 450 having more configurations or fewer configurations may be implemented. For example, a predetermined coating layer may be formed on the quantum shell 461 of the quantum dot 450. The coating layer may be a layer implemented to improve durability of the quantum dot 450.

Hereinafter, the chain molecule 470 will be described.

7 is a schematic view showing a chain molecule according to an embodiment of the present application.

Referring to FIG. 7, the chain molecule 470 may include a head 480 and a tail 481.

The head 480 and the tail 481 may have a predetermined chemical property. The chemical property may include a hydrophilic property and a hydrophobic property.

The hydrophilicity can be defined by any hydrophilic group. For example, the hydrophilic group may be one of a hydroxyl group (-OH), a carboxyl group (-COOH) and an amino group (-NHRh, -NH2, -NRh2, wherein R is an alkyl group).

The hydrophobicity can be defined by any hydrophobic group. For example, the hydrophobic group may be a hydrocarbon group (CnHm).

The head 480 and the tail 481 may have different chemical properties. For example, the tail 481 may be hydrophobic when the head 480 is hydrophilic, and the tail 481 may be hydrophilic when the head 480 is hydrophobic.

Alternatively, the head 480 and the tail 481 may have the same chemical properties.

)”일 수 있다.The tail 481 may have a predetermined chemical shape. For example, when the tail 481 is a hydrocarbon group, the chemical shape of the tail 481 is “chain shaped (

) ”.

The tail 481 may define a physical structure of the chain molecule 470. By the tail 481, the chain molecules 470 may have a predetermined physical length. For example, when the tail 481 is a hydrocarbon group, the tail 481 may have a predetermined length based on the number of carbons (C) included. The length of the tail 481 may be proportional to the number of carbons C included.

On the other hand, the length of the chain molecule 470 is longer than the length of the ligand 462. The number of carbons (C) included in the chain molecule 470 may be greater than the number of carbons (C) included in the ligand 462.

The chain molecule 470 described above may be a stearic compound. The chain molecule 470 may be, for example, a kind of stearic acid. The stearic acid may be magnesium stearate, calcium stearate, zinc stearate, zinc stearate, lithium stearate, sodium stearate, or aluminum stearate. stearate) and the like.

When the chain molecule 470 is zinc stearate, the chain molecule 470 may include a head 480 composed of a carboxyl group (hydrophilic group) and a tail 481 composed of a hydrocarbon group (hydrogen group). .

Hereinafter, the bead 500 will be described.

8 illustrates a bead according to an embodiment of the present application.

Referring to FIG. 8, the bead 500 may include a bead-shell 491, and an inner space 492 may be defined by the bead-shell 491.

The bead shell 491 may define the external shape of the bead 500. The bead shell 491 may be formed such that the external shape of the bead 500 becomes a sphere shape.

The bead shell 491 may have a predetermined optical characteristic. The optical properties may include light transmission and light scattering.

The bead shell 491 may transmit light incident to the bead shell 491. The bead shell 491 may be implemented with a light transmissive material. For example, the bead shell 491 may be implemented with a silica-based material such as silicon oxide (SiO 2).

The bead shell 491 may scatter light incident on the bead shell 491.

The bead shell 491 may be implemented in various thicknesses according to the purpose. For example, the bead shell 491 may be formed to a thin thickness to improve the light transmittance of the bead shell 491. Alternatively, the bead shell 491 may be formed to a thick thickness to improve the durability of the bead shell 491. Alternatively, the bead shell 491 may be formed to an appropriate thickness considering the light transmittance and durability at the same time.

A predetermined filler may be filled in the inner space 492, but the inner space 492 may be empty. In this case, the state of the bead 500 may be defined as a hollow-core state.

In the case of the bead 500 implemented in the hollow state, the optical characteristics of the bead 500 may be improved.

When the bead 500 is in a hollow state, light transmittance of the bead 500 may be improved. When the bead 500 is filled with a predetermined filler, the filler may inhibit light output through the bead 500. When predetermined light is incident on the bead shell 491 of the bead 500 and the bead shell 491 transmits the light, the transmitted light may be blocked by the filler. Accordingly, the light output from the bead 500 may be inhibited. In contrast, when the bead 500 is in a hollow state, light transmitted through the bead shell 491 may not be blocked, but may propagate in the bead 500. In this case, the light may be output to the outside of the bead 500 without great inhibition. Accordingly, when the bead 500 is in a hollow state, light transmittance of the bead 500 may be improved.

When the bead 500 is in a hollow state, light scattering property of the bead 500 may be improved. When the bead 500 is filled, light scattered through the bead shell 491 may be blocked by the filler. In contrast, in the case of the hollow bead 500, the light scattered in one region of the bead shell 491 may propagate without blocking in the bead 500. The propagated light may be recalculated in other regions of the bead shell 491. The recalculated light may be output to the outside of the bead 500. Accordingly, in the case of the hollow bead 500, the light scattering property of the bead 500 may be improved.

On the other hand, when the bead 500 is filled with a predetermined filler, the filler may be a high light transmittance material.

Meanwhile, the components shown in FIG. 8 are not essential, and the beads 500 having more or fewer components may be implemented.

For example, the bead 500 may further include a predetermined coating layer disposed on the bead shell 491. The predetermined coating layer may be a layer formed to improve the optical characteristics of the bead 500.

On the other hand, for example, the bead 500 described above may be hollow silica beads.

On the other hand, the quantum dot film 400 may further include a configuration that is not shown in FIG.

The quantum dot film 400 may further include a predetermined mineral.

The mineral may be at least one of montmorillonite (MT), halosite, bentonite, or hectorite.

The mineral may have a plate or tube shape. In this case, weather resistance of the quantum dot film 400 may be improved.

Alternatively, the quantum dot film 400 may be provided in a form disposed on a predetermined substrate.

The substrate is polycarbonate (PC), polyarylate (PAR), polyethersulfone (PES), polyimide (PI), polyethylene terephthalate (PET), polyethylene naphthalate (PEN), or polyether ether ketone (PEEK) It may be a substrate implemented as).

Hereinafter, the positional relationship and the coupling relationship between the components in the quantum dot powder 401 will be described.

9 illustrates a quantum dot 450, a chain molecule 470, and a bead 500 according to an exemplary embodiment of the present application. A description with reference to FIG. 9 is as follows. The quantum dot 450 may include a first quantum dot 451 and a second quantum dot 452, and the chain molecule 470 may include a first chain molecule 471 and a second chain molecule 472. .

The quantum dot 450 and the chain molecule 470 may have a coupling relationship with a predetermined positional relationship. That is, the quantum dot 450 and the chain molecule 470 may be attached to each other. The chain molecules 470 and the beads 500 may have a coupling relationship with a predetermined positional relationship. That is, the chain molecule 470 and the bead 500 may be attached to each other.

First, the relationship between the quantum dot 450 and the chain molecule 470 will be described.

The chain molecule 470 may be attached to the quantum dot 450. The first chain molecule 471 may be attached to the first quantum dot 451, and the second chain molecule 472 may be attached to the second quantum dot 452. The chain molecule 470 may be attached to one region of the quantum shell 461 of the quantum dot 450.

One region of the chain molecule 470 may be attached to the quantum dot 450.

One region of the chain molecule 470 may be an area of the head 480 of the chain molecule 470. Alternatively, one region of the chain molecule 470 may be an area of the tail 481 of the chain molecule 470. The head 480 of the first chain molecule 471 may be attached to the quantum dot 450, and the tail 481 of the second chain molecule 472 may be attached to the quantum dot 450.

One end of the chain molecule 470 may be attached to the quantum dot 450. One end of the chain molecule 470 may be an end portion of the head 480 of the chain molecule 470. Alternatively, one end of the chain molecule 470 may be an end portion of the tail 481 of the chain molecule 470. An end portion of the head 480 of the first chain molecule 471 is attached to the quantum dot 450, and an end portion of the tail 481 of the second chain molecule 472 is attached to the quantum dot 450. Can be.

The chain molecule 470 may be attached to a region of the quantum dot 450 between the adjacent ligand 462.

The attachment may be by electrical attraction, or by chemical bonding. The electrical attraction may include Vanderwalls attraction, Coulomb's attraction, and the like. The chemical bond may include covalent bonds, coordination bonds, dipole-dipole action, and the like.

As the chain molecules 470 are attached to the quantum dots 450, dispersibility of the quantum dots 450 in the quantum dot film 400 may be improved. When the chain molecules 470 and the quantum dots 450 of the quantum dot film 400 are not attached, the quantum dots 450 in the quantum dot film 400 may be adjacent to each other. Accordingly, the quantum dots 450 adjacent to each other may be agglomerated and aggregated. On the contrary, when the chain molecules 470 and the quantum dots 450 are attached, the quantum dots 450 in the quantum dot film 400 may be spaced apart from each other. Accordingly, aggregation of the quantum dots 450 is reduced. Dispersibility of the quantum dot 450 may be improved.

Hereinafter, the relationship between the chain molecule 470 and the bead 500 will be described.

The bead 500 may be located between adjacent chain molecules 470. The bead 500 may be located between the first chain molecule 471 and the second chain molecule 472.

The beads 500 may be located between other regions of the adjacent chain molecules 470. The other region may be defined as an area of the chain molecule 470 excluding one region attached to the quantum dot 450 of the chain molecule 470. The bead 500 may be located between the other region of the first chain molecule 471 and the other region of the second chain molecule 472. The other regions of the adjacent chain molecules 470 may be configured of the same chain molecules 470. For example, when the other region of the first chain molecule 471 is the head 480, the other region of the second chain molecule 472 may be the head 480, and the first chain molecule 471 is used. When the other region of) is a tail 481, the other region of the second chain molecule 472 may be a tail 481. Alternatively, the other regions of the adjacent chain molecules 470 may be configurations of different chain molecules 470.

The bead 500 may be located between the other ends of the adjacent chain molecules 470. The other end may be defined as a portion opposite to one end attached to the quantum dot 450 of the chain molecule 470. The bead 500 may be located between the other end of the first chain molecule 471 and the other end of the second chain molecule 472. The other end of the adjacent chain molecules 470 may be configured of the same chain molecule 470. For example, when the other end of the first chain molecule 471 is the head 480, the other end of the second chain molecule 472 may be the head 480, and the first chain molecule 471 may be When the other end is a tail 481, the other end of the second chain molecule 472 may be a tail 481. Alternatively, the other ends of the adjacent chain molecules 470 may be configured of different chain molecules 470.

The bead 500 may be attached to adjacent chain molecules 470. The bead 500 may be attached to the first chain molecule 471 and the second chain molecule 472. The bead 500 may be attached to the other region or the other end of the first chain molecule 471 and the other region or the other end of the second chain molecule 472.

The attachment may be by electrical attraction, or by chemical bonding. The electrical attraction may include Vanderwalls attraction, Coulomb's attraction, and the like. The chemical bond may include covalent bonds, coordination bonds, dipole-dipole action, and the like.

The luminous efficiency of the quantum dot film 400 including the bead 500 may be improved. When the beads 500 are not included in the quantum dot film 400, the quantum dots 450 in the quantum dot film 400 may contact each other. The quantum dots 450 contacting each other may be agglomerated and aggregated. On the contrary, in the case of the quantum dot film 400 including the bead 500, the quantum dots 450 in the powder may be spaced apart from each other. Light output from the aggregated quantum dots 450 may interfere with each other. The luminous efficiency of the quantum dot film 400 including the aggregated quantum dots 450 is reduced. On the contrary, when the bead 500 is included in the quantum dot film 400, the dispersibility of the quantum dots 450 is increased. Therefore, interference of light output from the quantum dots 450 may be reduced. The light not interfering with each other may be output from the quantum dot film 400. Accordingly, the luminous efficiency of the quantum dot film 400 including the bead 500 may increase.

In the above, each structure in the quantum dot powder 401 was demonstrated.

Hereinafter, the positional relationship and the coupling relationship of the organism 410, the inorganic body 430, and the quantum dot powder 401 will be described.

10 is a diagram illustrating an organism 410, an inorganic body 430, and a quantum dot powder 401 according to an embodiment of the present application.

Referring to FIG. 10, the components of the organic 410, the inorganic 430, and the quantum dot powder 401 including the quantum dots 450, the chain molecules 470, and the beads 500 are organically attached to each other. Can be.

For example, the organism 410 is attached to each other with the inorganic body 430, the inorganic body 430 is attached to each other with the chain molecule 470, the chain molecule 470 is the quantum dot 450 and the It may be attached to the beads 500. Hereinafter, for convenience of description, each component may be attached to each other, but will be described only in the above examples.

The organism 410 includes a first organism 411 including a first organic core 416 and a first organic functional group 425, and a second organic central group 417 and a second organic functional group 426. And a second organic body 412, wherein the inorganic body 430 includes a first inorganic core 436 and a first inorganic functional group 445, and a first inorganic body 431 and a second inorganic core 231. ) And a second inorganic body 432 including a second inorganic functional group 446, wherein the quantum dot 450 includes a first quantum dot 451 and a second quantum dot 452, and the chain molecule 470. ) May include a first chain molecule 471 and a second chain molecule 472.

The organism 410 and the inorganic body 430 may be attached to each other. As illustrated in FIG. 8, the first organism 411 and the first inorganic body 431 may be attached to each other, and the second organism 412 and the second inorganic body 432 may be attached to each other.

In this case, the plurality of organisms 410 may be composed of the same element, or the plurality of inorganic bodies 430 may be composed of different elements. The first organism 411 and the second organism 412 may be composed of the same element.

Alternatively, the plurality of organisms 410 may be composed of the same element, or the plurality of organisms 410 may be composed of different elements. The first inorganic body 431 and the second inorganic body 432 may be formed of the same element. The plurality of organisms 410 may be composed of different elements. The first organism 411 and the second organism 412 may be composed of different elements, and the first inorganic body 431 and the second inorganic body 432 may be composed of different elements. The constituent elements of the first organic central group 416 and the elements of the second organic central group 417 are different from each other, and the constituent elements of the first organic functional group 425 and the second organic functional group 426 are different from each other. The member elements are different, and the constituent elements of the first inorganic center group 436 and the member elements of the second inorganic center group 437 are different, and the constituent elements of the first inorganic functional group 445 and the second inorganic functional group are different. The members of 446 may be different. In other words, the length of the first organic functional group 425 and the length of the second organic functional group 426 may be different.

The above examples can be combined with each other. For example, the plurality of organisms 410 may be composed of the same elements, and the plurality of inorganic bodies 430 may be composed of different elements. Alternatively, the plurality of organisms 410 may be composed of different elements, and the plurality of inorganic bodies 430 may be composed of the same elements.

 Each region of the organism 410 and each region of the inorganic body 430 may be attached to each other. The other end of the organic functional group 420 of the organism 410 may be attached to the other end of the inorganic functional group 440 of the inorganic body 430. The other end of the inorganic functional group 440 may be attached to the middle of the organic functional group 420. The middle of the organic functional group 420 may be defined as a region between one end and the other end of the organic functional group 420.

The areas to be attached to each of the organic 410 and the inorganic 430 to be attached may be different from each other. For example, the first organism 411 and the first inorganic body 431 may be attached to each other, and the other end of the first inorganic functional group 445 may be attached to the middle of the first organic functional group 425. . In this case, the second organism 412 and the second inorganic body 432 may be attached to each other, the other end of the second organic functional group 426 and the other end of the second inorganic functional group 446 may be attached to each other. .

Attachment of the organism 410 and the inorganic body 430 may be caused by electrical attraction or chemical bonding. The electrical attraction may include Vanderwalls attraction, Coulomb's attraction, and the like. The chemical bond may include covalent bonds, coordination bonds, dipole-dipole action, and the like.

The inorganic body 430 and the chain molecule 470 may be attached to each other. Each region of the inorganic body 430 and each region of the chain molecule 470 may be attached to each other.

The other end of the inorganic functional group 440 of the inorganic body 430 may be attached to the head 480 or the tail 481 of the chain molecule 470. Alternatively, the head 480 or the tail 481 of the chain molecule 470 may be attached to the middle of the inorganic functional group 440. That is, the other end of the first inorganic functional group 445 of the first inorganic body 431 is attached to the head 480 or the tail 481 of the first chain molecule 471, the second weapon of the second inorganic body 432 The head 480 or tail 481 of the first chain molecule 471 may be attached to the middle of the functional group 446.

Meanwhile, the inorganic body 430 may be attached to the chain molecule 470 attached to the bead 500 and the quantum dot 450.

In this case, the other end of the inorganic functional group 440 of the inorganic body 430 may be attached to the head 480 or the tail 481 of the chain molecule 470. In other words, a first chain molecule 471 is attached to the bead 500 and the first quantum dot 451, the first inorganic body 431 is attached to the first chain molecule 471, the first inorganic body The other end of the first inorganic functional group 445 of 431 may be attached to the head 480 or the tail 481 of the first chain molecule 471. At the same time, a second chain molecule 472 is attached to the bead 500 and the second quantum dot 452, and the second inorganic body 432 is attached to the second chain molecule 472, the second inorganic body ( The other end of the second inorganic functional group 446 of 432 may be attached to the head 480 or the tail 481 of the first chain molecule 471.

Attachment of the inorganic body 430 and the chain molecule 470 may be due to electrical attraction or chemical bonding. The electrical attraction may include Vanderwalls attraction, Coulomb's attraction, and the like. The chemical bond may include covalent bonds, coordination bonds, dipole-dipole action, and the like.

The quantum dot film 400 having the organic relationship described above may have an effect of improving phase stability and thermal stability. If there is no organic connection between the components of the quantum dot film 400, each component may not support each other. Accordingly, each component in the quantum dot film 400 can be easily modified by external conditions such as external force, temperature, application of light, and the like. The initial light efficiency of the quantum dot film 400 can be easily changed by the external conditions described above. On the contrary, when there is an organic connection relationship between the components of the quantum dot film 400, the components may support each other. As a result, the quantum dot film 400 may be robust to external conditions such as external force, temperature, application of light, and the like. That is, the thermal stability and phase stability of the quantum dot film 400 having an organic connection relationship between the respective components may be improved compared to the thermal stability and phase stability of the quantum dot 450 film having no organic connection relationship between the respective components.

Hereinafter, an experimental example of the thermal stability and phase stability of the actual embodiment and the actual embodiment of the quantum dot film 400 will be described.

11 is a view showing a quantum dot film 400 actually implemented according to an embodiment of the present application.

Referring to FIG. 11, when a predetermined light is applied to the actually implemented quantum dot film 400, the quantum dot film 400 may output light having a specific wavelength band. The output specific wavelength band may be controlled by adjusting the quantum dot 450 included in the quantum dot film 400. That is, the quantum dot film 400 may have various colors that are not limited to those shown.

Hereinafter, experimental examples will be described.

The experimental example is an experimental example (Experimental Example 1) for experimenting the performance of the actually implemented quantum dot film 400 disposed on the light display device and an experimental example to test the performance by placing the quantum dot film 400 on a predetermined substrate (Experimental example 2) is included.

Experimental Example 1.

The actually implemented quantum dot film 400 was applied to the LED package and tested.

As a result, the quantum dot film 400 disposed in the lighting device had little decrease in luminous efficiency (lm / W) and color index (CRI) despite the passage of time.

Table 1 below is a result table of Experimental Example 1.

lm
lm / W Power
CIE [X]
CIE [Y]
CCT
CRI
intensity @ 637nm value Change rate Downlight bare 987 106.8 9.2 0.313 0.3317 6470 83.1 6.87E ^ -3 + 0hr 865 93.7 -12% 9.2 0.3433 0.341 5037 92.2 1.23E ^ -2 + 236hr 888 96.2 -10% 9.2 0.3412 0.3395 5119 91.9 1.10E ^ -2 + 286hr 890 95.2 -11% 9.3 0.3427 0.3411 5060 92 1.24E ^ -2 + 408hr 904 96.6 -9% 9.4 0.3438 0.3416 5016 91.8 1.24E ^ -2 + 476hr 905 97.3 -9% 9.3 0.3428 0.3413 5057 91.8 1.22E ^ -2

The power of the LED was adjusted to a constant level and irradiated to the quantum dot film 400 disposed in the lighting apparatus.

In spite of the elapse of the time, the decrease rate of the initial luminous efficiency (lm / W) of the quantum dot film 400 appeared very small -9% to -12%.

In addition, despite the passage of time, the initial color index of the quantum dot film 400 was maintained at about 92.

Experimental Example 2.

The actual quantum dot film 400 was placed on a predetermined substrate to test phase stability and thermal stability.

The experiment was performed by aging the quantum dot film 400.

As a result, in spite of aging, the quantum dot film 400 has a light efficiency that increases with time.

Experimental Example 2-1.

A first experiment for measuring the light efficiency when the white LED is applied to the quantum dot film 400 actually implemented on the PEN film and a second experiment for measuring the light efficiency when the h.v is applied were performed.

Table 2 below shows the results of experiments of phase stability and thermal stability by arranging the actually implemented quantum dot film 400 on a predetermined substrate.

Experimental classification First experiment 2nd experiment Experimental condition R.T (room temperature) 60˚C h.v Hour
＼
Hour Light efficiency Change rate Light efficiency Change rate Light efficiency Change rate Initial 50.6% 46.0% 48.8% 2 56.5% 12% 50.1% 9% 71.8% 47% 12 50.6% 32% 52.4% 14% 80.7% 66% 14 66.7% 32% 52.6% 14% 80.9% 66% 16 66.6% 41% 60.4% 31% 79.5% 63% 20 71.2% 35% 62.8% 37% 83.7% 71% 23 68.4% 45% 62.1% 35% 83.3% 71% 27 73.5% 41% 56.2% 22% 85.3% 75% 30 71.2% 53% 61.2% 33% 87.6% 79% 36 77.6% 42% 62.3% 36% 82.5% 69% 48 72.9% 44% 54.1% 18% 81.0% 66%

The light efficiency of the quantum dot film 400 disposed on the PEN was increased even after the hour.

Experimental Example 2-2.

The first experiment for measuring the light efficiency when the white LED is applied to the actually implemented quantum dot film 400 disposed on the PET film and the second experiment for measuring the light efficiency when h.v was applied were performed.

Experimental classification First experiment 2nd experiment Experimental condition R.T (room temperature) 60˚C h.v Hour
＼
Hour Light efficiency Change rate Light efficiency Change rate Light efficiency Change rate Initial 50.5% 52.8% 52.00% 2 55.1% 9% 51.30% -3% 81.30% 47% 12 70.8% 40% 60.5% 15% 83.20% 65% 14 68.4% 35% 57.1% 8% 83.20% % 16 73.0% 45% 62.1% 18% 84.60% 63% 20 72.0% 44% 66.9% 27% 83.00% 60% 23 73.2% 45% 65.5% 24% 81.30% 56% 27 73.9% 46% 67.5% 28% 81.10% 56% 30 77.6% 54% 68.10% 29% 85.90% 65% 36 74.6% 48% 65.1% 23% 82.50% 59% 48 52.8% 48% 60.3% 14% 82.50% 59%

Even with the passage of time, the light efficiency of the quantum dot film 400 disposed on the PET was rather increased.

As a result, the quantum dot film 400 of the present application has superior phase stability and thermal stability as compared to the conventional quantum dot film 400.

In the case of the conventional quantum dot film 400, the light efficiency of the quantum dot film 400 is reduced over time.

On the contrary, it can be seen from the above experimental examples that the light efficiency of the quantum dot film 400 of the present application is increased rather than decreased over time.

<Example 1-2>

Hereinafter, the first to second embodiments, which are modified examples of the first to first embodiments, will be described. Overlapping descriptions of the first-first embodiment and the first-second embodiment are omitted. Unless otherwise specified in the following description, the first-first embodiment described above in the first-second embodiment may be applied.

The organic 410 and the inorganic 430 included in the quantum dot film 400 may form a predetermined network structure.

12 is a view showing a quantum dot film 400 having a network structure according to an embodiment of the present application.

13 is a view showing the configuration of a quantum dot film 400 according to an embodiment of the present application.

Referring to FIG. 12, the quantum dot film 400 may include a network 495 and a quantum dot powder 401 positioned between the plurality of networks 495.

The network 495 may allow the quantum dot film 400 to have a predetermined network structure. The network structure may be defined as a structure in which a plurality of networks 495 exist and a predetermined space is formed between the plurality of networks 495.

Referring to FIG. 13, the network 495 may be formed by continuously attaching the inorganic material 430 and the organic material 410. The organism 410 may include a first organism 411 and a second organism 412, and the inorganic body 430 may include a first inorganic body 431 and a second inorganic body 432.

The inorganic body 430 may be located between the adjacent organisms 410. The inorganic body 430 may be located between the first organism 411 and the second organism 412.

The inorganic body 430 may be attached to the adjacent organism 410. One inorganic functional group 440 of the inorganic body 430 may be attached to the first organism 411, and the other inorganic functional group 440 may be in contact with the second organism 412. The inorganic functional group 440 may be attached to the organic functional group 420 of the first organism 411, and the other inorganic functional group 440 may be attached to the organic functional group 420 of the second organism 412.

The organism 410 may be located between adjacent inorganic bodies 430. The organism 410 may be located between the first inorganic body 431 and the second inorganic body 432.

The organism 410 may be attached to the adjacent inorganic body 430. One organic functional group 420 of the organism 410 may be attached to the first inorganic body 431, and the other organic functional group 420 may be in contact with the second inorganic body 432. The one organic functional group 420 may be attached to the inorganic functional group 440 of the first inorganic body 431, and the other organic functional group 420 may be attached to the inorganic functional group 440 of the second inorganic body 432.

Each configuration of the quantum dot film 400 may be accommodated in a predetermined network structure defined by the organic 410 and the inorganic 430 continuously connected to each other. The network structure may include an organism 410, an inorganic body 430, a quantum dot 450, a bead 500, and a chain molecule 470.

By forming the network structure, the quantum dot film 400 may have improved phase stability and thermal stability. The configuration of the quantum dot film 400 may be modified by an external force applied to the quantum dot film 400. If the network structure is not formed, there is no buffer configuration that can minimize deformation of the configuration. On the contrary, when the network structure is formed, deformation of each configuration may be prevented in a predetermined network formed by the continuously connected organism 410 and the inorganic body 430. The network can be minimized to the deformation of each configuration. As a result, when the network structure is formed, it may have superior phase stability and thermal stability as compared to the quantum dot film 400 when the network structure is not formed.

<Example 1-3>

Hereinafter, Embodiments 1-3, which are modified examples of Embodiments 1-1 and 1-2, will be described. Overlapping descriptions of Embodiments 1-1 to 1-2 and Embodiments 1-3 are omitted. Unless otherwise specified in the following description, the above-described embodiment 1-1 or embodiment 1-2 may be applied to the embodiment 1-3.

The inorganic body 430 of the quantum dot film 400 of the present application may be in contact with each component of the quantum dot film 400.

FIG. 14 is a diagram illustrating an inorganic body 430 attached to a ligand 462 of a quantum dot 450 according to an exemplary embodiment of the present application.

15 is a view showing the inorganic body 430 attached to the surface of the quantum dot 450 according to an embodiment of the present application.

16 is a view showing the inorganic body 430 attached to the bead 500 according to an embodiment of the present application.

A description with reference to FIGS. 14 to 16 is as follows.

The inorganic body 430 and the ligand 462 of the quantum dot 450 may be attached to each other. The inorganic functional group 440 of the inorganic body 430 may contact the ligand 462.

The inorganic body 430 may be attached to the surface of the quantum dot 450. The inorganic functional group 440 of the inorganic body 430 may be in contact with the quantum shell 461 of the quantum dot 450.

The inorganic body 430 may be attached to the bead 500. The inorganic functional group 440 of the inorganic body 430 may contact the surface of the bead 500.

The contact of the inorganic body 430 for each of the components may be combined with each other. The inorganic body 430 may include a first inorganic body 431 and the second inorganic body 432. The first inorganic body 431 is in contact with the chain molecule 470, and the second inorganic body 432 is in contact with the ligand 462, the quantum shell 461, the chain molecule 470, or the bead 500. Can be. The first inorganic body 431 may be in contact with the ligand 462, and the second inorganic body 432 may be in contact with the ligand 462, the quantum shell 461, the chain molecule 470, or the bead 500. Can be. The first inorganic body 431 is in contact with the quantum shell 461, the second inorganic body 432 is in contact with the ligand 462, quantum shell 461, chain molecules 470, or bead 500 Can be. The first inorganic body 431 may be in contact with the bead 500, and the second inorganic body 432 may be in contact with the ligand 462, the quantum shell 461, the chain molecule 470, or the bead 500. Can be.

Contact of the inorganic functional group 440 for each of the above components may be combined with each other. The inorganic body 430 may include a first inorganic functional group 441 and a second inorganic functional group 443. The first inorganic functional group 441 is in contact with the chain molecule 470, the second inorganic functional group 443 is a ligand 462, quantum shell 461, chain molecules 470, or beads 500 Can be contacted. The first inorganic functional group 441 is in contact with the ligand 462, and the second inorganic functional group 443 is connected to the ligand 462, the quantum shell 461, the chain molecule 470, or the bead 500. Can be contacted. In contact with the quantum shell 461 that is the first inorganic functional group 441, the second inorganic functional group 443 is a ligand 462, quantum shell 461, chain molecules 470, or beads 500 Can be contacted. The first inorganic functional group 441 is in contact with the bead 500, the second inorganic functional group 443 is a ligand 462, quantum shell 461, chain molecules 470, or beads 500 Can be contacted.

On the other hand, the inorganic functional group 440 of the inorganic body 430 has been described as being in contact with each configuration of the quantum dot film 400, the inorganic core 435 of the inorganic body 430 of the quantum dot film 400 Each configuration can be contacted. For example, the ligand 462 may be in contact with the inorganic core 435 of the inorganic body 430.

On the other hand, the inorganic body 430 has been described as being in contact with each component of the quantum dot film 400, the organic material 410 may be in contact with each component of the quantum dot film 400. Since the organic 410 is in contact with each component of the quantum dot film 400 is similar to that of the aforementioned inorganic body 430 is in contact with each component of the quantum dot film 400, the overlapping description thereof will be omitted.

Hereinafter, the relationship between each configuration of the display device 1 and each configuration of the quantum dot film 400 will be described.

Each component of the quantum dot film 400 may be in contact with each component of the display device 1.

Each component of the quantum dot film 400 may be in contact with the reflective plate 300. Each component of the quantum dot film 400 may be in contact with the first base film 310 of the reflective plate 300.

The organic and inorganic bodies of the quantum dot film 400 may contact the reflecting plate 300. The organic material 410 and the inorganic material 430 may contact the first base film 310 of the reflective plate 300 of the reflective plate 300. The organic functional group 420 of the organic 410 and the inorganic functional group 440 of the inorganic 430 may contact the upper surface of the first base film 310.

The quantum dot powder 401 disposed between the organic 410 and the inorganic 430 may be in contact with the reflective plate 300. The quantum dot powder 401 of the quantum dot film 400 may be in contact with the reflective plate 300. The quantum dot powder 401 may contact the upper surface of the first base film 310 of the reflector 300 of the reflector 300.

The quantum dot 450, the chain molecules 470, or the beads 490 included in the quantum dot powder 401 may be in contact with the reflector 300. The quantum dot 450, the chain molecules 470, or the beads 490 may contact the upper surface of the first base film 310 of the reflector 300 of the reflector 300.

Each component of the quantum dot film 400 may be in contact with the light driver 120.

At least one of the components of the organic 410, the inorganic 430, or the quantum dot powder 401 of the quantum dot film 400 may be in contact with the light driver 120.

Hereinafter, an experimental example will be described.

The experimental example is an example in which the light efficiency of the quantum dot film 400 disposed below the light guide plate 200 is compared with the light efficiency of the quantum dot film 400 disposed above the light guide plate 200.

The experiment was performed on a 200um thick quantum dot film 400 and a 400um thick quantum dot film 400.

Reference example (arranged on top of light guide plate) Experimental Example (arranged under the light guide plate) Film Type Luminance
(cd / m ² ) CIE x CIE y Luminance
(cd / m ² ) Standard
Luminance increase% CIE x CIE y QD 200um
_White 153 0.4159 0.4304 163 6 0.3896 0.3962 QD 200um
_Blue 6 0.165 0.0878 7 0.1619 0.0685 QD 200um
_Green 109 0.3426 0.6378 115 0.338 0.6262 QD 200um
_Red 38 0.6643 0.329 40 0.6607 0.3287 QD 200um
_White 148 0.4362 0.4585 153 3 0.3917 0.4014 QD 200um
_Blue 4 0.1709 0.1078 6 0.1622 0.067 QD 200um
_Green 107 0.3563 0.6217 110 0.3447 0.6227 QD 200um
_Red 36 0.6648 0.3308 37 0.6596 0.3304

It can be seen that the luminance of the quantum dot film 400 is lower than that of the light guide plate 200 when the quantum dot film 400 is disposed above the light guide plate 200.

Second Embodiment

Hereinafter, a second embodiment, which is a modification of the first embodiment, will be described. Overlapping descriptions of the first embodiment and the second embodiment are omitted. Unless otherwise specified in the following description, the first embodiment described above may be applied to the second embodiment.

17 is a side view illustrating the backlight unit 10, the support main 40, and the bottom cover according to the exemplary embodiment of the present application.

Referring to FIG. 17, the quantum dot film 400 may be in contact with the light guide plate 200. An upper surface of the quantum dot film 400 may contact the lower surface of the light guide plate 200.

When the quantum dot film 400 is disposed to contact the light guide plate 200, the light emitting efficiency of the display device may be increased. When there is a gap between the quantum dot film 400 and the light guide plate 200, the quantum dot film 400 may be farther from the light source 110 than when the quantum dot film 400 is disposed in contact with each other. Accordingly, the quantum dot film 400 may be difficult to receive the light emitted from the light source 110. The quantum dot film 400 may not generate a sufficient amount of modulated light. In contrast, when the quantum dot film 400 is disposed to contact the light guide plate 200, the quantum dot film 400 and the light source 110 may be disposed to be close to each other. Accordingly, the quantum dot film 400 may receive more light from the light source 110 to generate a sufficient amount of modulated light. As a result, the luminous efficiency of the display device can be increased.

Third Embodiment

Hereinafter, the third embodiment, which is a modification of the first to second embodiments, will be described. The overlapping description of the first to second embodiments and the third embodiment is omitted. Unless otherwise specified in the following description, the first to second embodiments described above may be applied to the third embodiment.

18 is a side view illustrating the backlight unit 100, the support main 40, and the bottom cover 20 according to the exemplary embodiment of the present application.

FIG. 19 is a diagram illustrating a quantum dot film 1400 disposed in a dot shape according to an embodiment of the present application.

Referring to FIG. 18, the quantum dot film 1400 may be disposed in one region of the reflective plate 300, and the light unit 100 may be disposed adjacent to the one region. The reflector 300 may include a first region 301 and a second region 303. The first area may be defined as an area of the reflector 300 in which the light source 110 is disposed adjacent to the second area, and the second area may be defined as an area of the reflector 300 in which the light source 100 is disposed far away. .

The quantum dot film 1400 may be disposed on the first region 301 of the reflector 300. The quantum dot film 1400 may be disposed on the first region 301 of the first base film.

The light source 110 of the light unit 100 may be disposed adjacent to the first region 301. The light source 110 may be disposed adjacent to the quantum dot film 1400 disposed in the first region 301.

When the light unit 100 is disposed adjacent to the first area 301, the luminous efficiency of the display device 1 may be increased. When the quantum dot film 1400 is disposed in the second region 303, the quantum dot film 1400 may be disposed far from the light source 110. Accordingly, the quantum dot film 1400 may be difficult to receive light emitted from the light source 110. The quantum dot film 1400 may not generate a sufficient amount of modulated light. In contrast, when the quantum dot film 1400 is disposed adjacent to the first region 301, the quantum dot film 1400 and the light source 110 may be disposed to be close to each other. Accordingly, the quantum dot film 1400 may receive more light from the light source 110 to generate a sufficient amount of modulated light. As a result, the luminous efficiency of the display device 1 can be increased.

The quantum dot film 1400 may be disposed at different quantum dot concentrations for each region of the reflecting plate 300. The quantum dot concentration may include a first concentration and a second concentration. The quantum dot film 1400 may be disposed at a first concentration in the first region and at a second concentration in the second region, and the first concentration may be greater than the second concentration.

The quantum dot film 1400 may be disposed at different thicknesses for each region of the reflecting plate 300. The thickness may include a first thickness and a second thickness. The quantum dot film may be disposed at a first thickness in the first region, and disposed at a second thickness in the second region, and the first thickness may be thicker than the second thickness.

Referring to FIG. 19, the quantum dot film 1400 may be disposed in a plurality of dots on the reflective plate 300.

The quantum dot film 1400 may include a first quantum dot film 1401, a second quantum dot film 1402, a third quantum dot film 1403, and a fourth quantum dot film 1404.

The first to fourth quantum dot film may be disposed on the upper surface of the reflective plate 300 in the form of a dot. The first to fourth quantum dot film may be disposed on the upper surface of the first base film in a dot shape.

The quantum dot film 1400 disposed in the dot form may have a predetermined size.

The quantum dot film 1400 may have different sizes. Sizes of the first to fourth quantum dot films may be different from each other. The radius of the dot of the first to fourth quantum dot film may be different from each other.

In this case, the size of the quantum dot film 1400 may be different for each region of the reflecting plate. The size may comprise a first size and a second size. The size of the quantum dot film 1400 may have a first size in a first area and a second size in a second area, and the first size may be larger than the second size.

Alternatively, the sizes of the quantum dot film 1400 may be the same. The sizes of the first to fourth quantum dot films may be the same. The radius of the dots of the first to fourth quantum dot film may be the same.

Alternatively, the sizes of the quantum dot film 1400 may be the same. The sizes of the first to fourth quantum dot films may be the same. A plurality of radii of the first to fourth quantum dot film may be the same.

The quantum dot film 1400 may be disposed such that a predetermined interval exists between the quantum dot films 1400. The interval between the quantum dot film 1400 may include a transverse gap and a longitudinal gap. The lateral spacing may be defined as a spacing between adjacent quantum dot films 1400 in a first direction, and the longitudinal spacing may be defined as a spacing in a direction perpendicular to the first direction between the quantum dot films 1400. The horizontal interval may include a first horizontal interval W1 and a second horizontal interval W2, and the vertical interval may include a first longitudinal interval H1 and a second longitudinal interval H2.

The spacing between the quantum dot films 1400 may be different from each other. Intervals between the first to fourth quantum dot films 1404 may be different from each other. The first horizontal gap W1 and the second horizontal gap W2 may be different from each other, and the first vertical gap H1 and the second vertical gap H2 may be different from each other.

In this case, the arrangement density of the quantum dot film 1400 may be different for each region of the reflector based on the different intervals. The batch density may include a first density and a second density. The batch density of the quantum dot film 1400 may have a first density in a first region, a second density in a second region, and the first density may be greater than the second density. The quantum dot film may be disposed at a first interval in the first region, and disposed at a second interval in the second region, and the first interval may be smaller than the second interval.

The intervals between the quantum dot films 1400 may be the same. The intervals between the first to fourth quantum dot films 1404 may be the same. The first lateral spacing W1 and the second lateral spacing W2 may be the same, and the first longitudinal spacing H1 and the second longitudinal spacing H2 may be the same.

The quantum dot film 1400 may be disposed for each area of the reflective plate. The quantum dot film 1400 may be disposed only in the first region.

On the other hand, the direction of the gap is only one example and is not limited thereto. That is, the transverse spacing and the longitudinal spacing are described as being perpendicular to each other. However, the transverse spacing and the longitudinal spacing may form a predetermined acute angle and an obtuse angle.

Fourth Example

Hereinafter, the fourth embodiment, which is a modification of the first to third embodiments, will be described. Overlapping descriptions of the first to third embodiments and the fourth embodiment are omitted. Unless otherwise specified in the following description, the first to third embodiments described above may be applied to the fourth embodiment.

20 is a diagram illustrating a display device 2 according to an exemplary embodiment of the present application.

FIG. 21 is a side view illustrating the backlight unit 10, the bottom cover 20, and the support main 40 according to the exemplary embodiment of the present application.

22 is a side view illustrating the backlight unit 10, the bottom cover 20, and the support main 40 according to the exemplary embodiment of the present application.

Referring to FIG. 20, the display device 2 includes a backlight unit 10, a bottom cover 20, an optical sheet 30, a support main 40, a display panel 50, a printed circuit board 60, An FPC 61 and a top cover 70 may be included, and the backlight unit 10 may include a light unit 100, a light guide plate 200, and a light modulated reflection film 1000.

The light modulated reflection film 1000 may be disposed between the light guide plate 200 and the bottom cover 20.

The light modulated reflection film 1000 may modulate the incident light and output modulated light. The modulated light may be defined as light having an optical characteristic different from that of light incident on the light modulated reflection film. The optical characteristics may include light intensity for each wavelength, an optical path, and the like. The modulated light may be white light.

Predetermined light may be incident on the light modulation reflection film 1000, and modulated light may be output from the light modulation reflection film 1000.

Hereinafter, the light modulating reflection film 1000 will be described with reference to FIGS. 21 and 22.

First, each configuration of the light modulation reflection film 1000 will be described.

The light modulation reflection film 1000 may include a first base film 310, a quantum dot film 400, a reflective film 330, and a second base film 350.

The first base film 310 may be disposed between the light guide plate 200 and the quantum dot film 400.

The quantum dot film 400 may be disposed between the first base film 310 and the reflective film 330.

The second base film 350 may be disposed below the reflective film 400.

Each of the above components may be integrally configured.

Since the light modulation reflection film 1000 is provided in the display device 2, the manufacturing process of the display device 2 may be simplified. The reflective film 330 and the quantum dot film 400 may be separately disposed on the display device 2. In this case, in order to manufacture the display device 2, a process of producing each layer separately and a process of disposing each layer separately on the display device 2 should be performed. On the contrary, the light modulation reflective film 1000 having the reflective film 330 and the quantum dot film 400 integrated therein may be provided in the display device 2. In this case, the process of disposing each layer separately on the display device 2 does not need to be performed, and the manufacturing process of the display device 2 can be simplified.

Hereinafter, each configuration of the light modulated reflection film 1000 will be described in detail.

The first base film 310 and the second base film 350, the first base film 310 may maintain the external shape of the light modulated reflection film 1000. The first base film 310 and the second base film 350 may maintain the arrangement state of the quantum dot film 400 and the reflective film 330 disposed therebetween.

The first base film 310 may prevent damage caused by a predetermined external force of the quantum dot film 400.

The first base film 310 may be made of a predetermined material. The material may be a material of polyethylene terephthalate (PET).

The first base film 310 may be disposed to contact the upper portion of the quantum dot film 400. The lower surface of the first base film 310 may contact the upper surface of the quantum dot film 400.

The first base film 310 may contact each component of the quantum dot film 400. The first base film 310 may be in contact with at least one of the organism 410, the inorganic body 430, the quantum dot 450, the chain molecule 470, or the bead 490 of the quantum dot film 400. .

When the first base film 310 is disposed, the manufacturing process of the display device 3 of the present application may be simplified. In the case of the conventional quantum dot film, thermal stability and phase stability are remarkably inferior. The color stability, color reproducibility, and light efficiency of the display device provided with the conventional quantum dot film decreases with time. To prevent this, a barrier film made of an organic inorganic composite material such as Al ₂ O ₃ , SiO _x , and SiNx (where x is 1-3) is disposed on the quantum dot film. The barrier film is formed according to a predetermined deposition process. On the contrary, the quantum dot film 400 of the present application has higher thermal stability and phase stability than the conventional quantum dot film. Therefore, even if the barrier film is not disposed on the quantum dot film 400, the display device 2 can maintain high color stability, color reproducibility, and light efficiency. Simply, the quantum dot film 400 has only a predetermined first base film 600 disposed thereon to prevent scratching of the quantum dot film 400. The first base film 600 may be formed by a roll-to-roll process that is simpler than the deposition process. Therefore, as a result, the manufacturing process of the display device 2 of the present application can be simplified.

Hereinafter, the quantum dot film 400 will be described.

An upper portion of the quantum dot film 400 may contact the first base film 310 and a lower portion may contact the reflective film 330. The quantum dot film 400 may be disposed to contact the upper portion of the reflective film 330.

Each component of the quantum dot film 400 may be in contact with a lower surface of the reflective film 330. At least one of the organic 410, the inorganic 430, the quantum dot 450, the chain molecules 470, and the beads 490 of the quantum dot film 400 may contact the lower surface of the reflective film 330. .

Hereinafter, the positional relationship between the first base film 310 and the light guide plate 200 will be described.

As shown in FIG. 21, the first base film 310 may be spaced apart from the light guide plate 200. A predetermined air gap 500 may be formed between the first base film 310 and the light guide plate 200. An upper surface of the first base film 310 may be exposed to the air gap 500.

Alternatively, as shown in FIG. 22, the first base film 310 may be disposed under the light guide plate 200 and may be in contact with the light guide plate 200. The first base film 310 may contact the lower surface of the light guide plate 200. An upper surface of the first base film 310 may be in contact with a lower portion of the light guide plate 200.

Hereinafter, the light output and the light application of each configuration of the backlight unit 10 including the light modulating reflection film 1000 will be described. The light output is defined as light output from each of the above configurations. The light application is defined as light applied to each of the above configurations.

FIG. 23 is a view showing the light output of the backlight unit 10 including the light modulated reflection film 1000 according to an embodiment of the present application.

A description with reference to FIG. 23 is as follows.

Referring to FIG. 23A, the light source 110 may output predetermined light.

Light emitted from the light source 110 may be dispersed by the light guide plate 200 and output in a downward direction. The light output in the downward direction may be applied to at least one of the first base film 310, the quantum dot film 400, and the reflective film 330.

Light may be output upward from each component of the backlight unit 10. Light may be output upward from the first base film 310 and the quantum dot film 400.

The light output upward from each component of the backlight unit 10 may include first to fifth lights. The light output from the light guide plate 200 and applied to the quantum dot film 400 is the first light S1, and the light output from the quantum dot film 400 and applied to the light guide plate 200 is the second light ( S2), the light output from the quantum dot film 400 and applied to the reflective film 330 is output as the third light S3 and output from the reflective film 330 to the first base film 310. The light may be a fourth light S4, and the light output from the first base film 310 and applied to the light guide plate 200 may be defined as a fifth light S5.

The first light S1 may be transmitted to the quantum dot film 400 through the first base film 310. The second light S2 may be transmitted to the light guide plate 200 through the first base film 310. The third light S3 may be output from the quantum dot film 400 and directly applied to the reflective film 330. The fourth light S4 may be output from the reflective film 330 and transmitted through the quantum dot film 400 to be applied to the first base film 310. The fifth light S5 may be output from the first base film 310 and applied to the light guide plate 200.

 The backlight BL may be output upward from the light guide plate 200.

Referring to FIG. 23B, a predetermined layer CL may be disposed between the quantum dot film 400 and the reflective film 330. The predetermined layer CL may be a barrier film or a base film. The material of the barrier film may be an organic inorganic composite material such as Al ₂ O ₃ , SiO _x , and SiNx (where x is 1-3).

In this case, since light is output from each component of the backlight unit 10 and applied to each component, as in the case where the quantum dot film 400 and the reflective film 330 are in contact with each other, the overlapping of the first to fifth lights is repeated. The description will be omitted.

In this case, the third light CS3 is transmitted to the reflective film 330 through the predetermined layer CL, and the fourth light CS4 is transmitted through the predetermined layer CL to the It may be applied to the first base film 310.

The backlight CBL may be output upward from the light guide plate 200.

According to the fourth embodiment of the present application, when the quantum dot film 400 and the reflective film 330 are disposed in contact, the light intensity of the backlight unit 10 may be improved.

The improvement of the light intensity may be due to the first base film 310 disposed on the backlight unit 10 on the quantum dot film 400. Referring to FIG. 23A, when the barrier film is disposed on the quantum dot film 400, the light intensity of the backlight BL may be greatly reduced by the barrier film. The intensity of the first light S1 applied to the quantum dot film 400 may be reduced by the barrier film. The intensity of the second light S2 output from the quantum dot film 400 may be reduced based on the first light S1 having the reduced intensity. The intensity of the second light S2 may be reduced by the barrier film and transmitted to the light guide plate 200. The decrease in intensity may be due to an organic inorganic composite material, such as Al ₂ O ₃ , SiO _x , SiNx (where x is 1-3) included in the barrier film. The backlight BL output from the light guide plate 200 may have a first intensity. On the contrary, when the first base film 310 is disposed on the quantum dot film 400, the intensity of the first light S1 may not be greatly reduced by the first base film 310. . The intensity of the first light S1 may be maintained. The intensity of the second light S2 output from the quantum dot film 400 may not be greatly reduced based on the first light S1. The intensity of the second light S2 may be maintained. The intensity of the second light S2 is not greatly reduced by the first base film 310 and may be transmitted to the light guide plate 200. In this case, the backlight BL output from the light guide plate 200 may have a second intensity. In this case, the second intensity may be greater than the first intensity. As a result, since the first base film 310 is disposed on the quantum dot film 400, the light intensity of the backlight emitted from the backlight unit 10 may be improved.

Alternatively, the improvement of the light intensity of the backlight may be due to the quantum dot film 400 and the reflective film 330 in contact with each other. Referring to FIGS. 23A and 23B, when a predetermined layer CL is formed between the quantum dot film 400 and the reflective film 330, the reflective film 330 may be used. The intensity of light transmitted to the light guide plate 200 may be greatly reduced. When the predetermined layer CL is formed, the intensity of the third light CS3 may be reduced by the predetermined layer CL and transferred to the reflective film 330. The reflective film 330 may output the fourth light CS4 having the reduced intensity based on the third light CS3 having the reduced intensity. The fourth light CS4 having the intensity reduced by the predetermined layer CL may be transmitted to the first base film 310. The first base film 310 may output the fifth light CS5 having a reduced intensity based on the fourth light S4. In this case, the light guide plate 200 may receive the fifth light CS5 and output the backlight CBL having the first intensity. On the contrary, the quantum dot film 400 may be formed in contact with the reflective film 330. In this case, the intensity of the third light S3 may be transmitted to the reflective film 330 without being disturbed by the predetermined layer CL. The reflective film 330 may output the fourth light S4 whose intensity is substantially maintained based on the third light S3. The first base film 310 may output a fifth light S5 whose intensity is maintained based on the fourth light S4. The light guide plate 200 may receive the fifth light S5 and output a backlight BL having a second intensity. The second intensity may be greater than the first intensity. As a result, the light intensity of the backlight emitted from the backlight unit 10 may be improved by contacting the quantum dot film 400 and the reflective film 330 with each other.

The above-described light transmission has been described in the case where the light guide plate 200 and the first base film 310 are spaced apart from each other, but the present invention is not limited thereto, and the light transfer may be performed by the light guide plate 200 and the first base film 310. This may also apply when contacted.

Fifth Embodiment

Hereinafter, the fifth embodiment, which is a modification of the first to fourth embodiments, will be described. The overlapping description of the first to fourth embodiments and the fifth embodiment is omitted. Unless otherwise specified in the following description, the first to fourth embodiments described above may be applied to the fifth embodiment.

24 is a diagram illustrating a direct type display device 3 according to an embodiment of the present application.

25 is a view illustrating a light unit 2100, a reflecting plate 2300, and a quantum dot film 2400 according to an exemplary embodiment of the present application.

24 and 25, the direct type display device 2 includes a direct type backlight unit 2010, a bottom cover 20, an optical sheet 30, a support main 40, a display panel 50, A printed circuit board 60, an FPC 61, and a top cover 70, and the direct type backlight unit 2010 includes a light unit 2100, a quantum dot film 2400, and a reflecting plate 2300. The light unit 2100 may include a light source unit 2110 and a lens unit 2130. However, the components illustrated in FIGS. 24 and 25 are not essential components, and a display device having more or fewer components than those illustrated in FIGS. 24 and 25 may be implemented. For example, the direct type display device 2 may include a light guide plate 200.

Hereinafter, each configuration of the direct type backlight unit 2100 will be described.

Referring to FIG. 25, the light unit 2100 may be disposed on the reflector 2300.

The light source unit 2110 of the light unit 2100 may be disposed on the reflective plate 2300. The lens unit 2130 may be disposed to cover the light source unit 2110. The lens unit 2130 may diffuse the light output from the light source unit 2110 and transmit the light to another configuration. By providing the lens unit 2130, the transmission rate of the light to each configuration can be improved.

A predetermined interval may be set between the plurality of light units 2100 disposed on the reflector 2300. The light unit 2100 may include first to fourth light units 2100. The first light unit 2101 and the second light unit 2102 have a first light lateral spacing L1, and the third light unit 2100 and the fourth light unit 2100 are second lights. It may have a lateral spacing (L2). The first light unit 2101 and the third light unit 2100 have a first light spacing J1, and the second light unit 2102 and the fourth light unit have a second light spacing. May have (J2).

The spacing between the light units 2100 may be different from each other. The spacing between the first to fourth light units may be different from each other. The first light horizontal gap L1 and the second light horizontal gap L2 may be different from each other, and the first light vertical gap J1 may be different from the second light vertical gap J2.

Alternatively, the spacing between the light units 2100 may be the same. The intervals between the first to fourth light units may be the same. The first light horizontal gap L1 and the second light horizontal gap L2 may be the same, and the first light vertical gap J1 and the second light vertical gap J2 may be the same.

A predetermined hole may be formed in the quantum dot film 2400. The hole may penetrate an upper surface and a lower surface of the quantum dot film 2400.

The hole may be formed at a position corresponding to the position of the light unit 2100. The hole may be formed to expose the light unit 2100 in the direction of the light guide plate.

The plurality of holes may have a predetermined distance from each other. The hole may include first to fourth holes 2404. The intervals between the first to fourth holes 2404 are different from each other, but may be set corresponding to the intervals between the light units 2100. The first hole 2401 and the second hole 2402 have a first light horizontal gap L1, and the third hole 2403 and the fourth hole 2404 have a second light horizontal gap L2. ) The first hole 2401 and the third hole 2403 have a first light spacing J1, and the second hole 2402 and the fourth hole 2404 have a second light spacing J2. )

The gaps between the holes may be different from each other. The spacing between the first to fourth holes may be different from each other. The first light horizontal gap L1 and the second light horizontal gap L2 may be different from each other, and the first light vertical gap J1 may be different from the second light vertical gap J2.

Alternatively, the intervals between the holes may be equal to each other. The intervals between the first to fourth holes may be equal to each other. The first light horizontal gap L1 and the second light horizontal gap L2 may be the same, and the first light vertical gap J1 and the second light vertical gap J2 may be the same.

FIG. 26 is a side view illustrating a direct backlight unit 2100, a support main, and a bottom cover according to an exemplary embodiment of the present application.

The quantum dot film 2400 may include a first quantum dot film 2405 and a second quantum dot film 2406.

The light unit 2100 may be disposed between adjacent quantum dot films 2400. The first light unit 2101 may be disposed between the first quantum dot film 2405 and the second quantum dot film 2406.

The light unit 2100 may be in contact with the adjacent quantum dot film 2400 and the reflector 2300. The first light unit 2101 may contact the first quantum dot film 2405 and the second quantum dot film 2406, and the second light unit 2102 may contact the second quantum dot film 2406. Can be. The lens unit 2130 of the first light unit 2101 contacts the first quantum dot film 2405 and the second quantum dot film 2406 and contacts the first base film 310 of the reflective plate 2300. Can be contacted. The lens unit 2130 of the second light unit 2102 may contact the second quantum dot film 2406 and may contact the first base film 310 of the reflective plate 2300.

Sixth Example

Hereinafter, a sixth embodiment, which is a modification of the first to fifth embodiments, will be described. Overlapping descriptions of the first to fifth embodiments and the sixth embodiment are omitted. Unless otherwise specified in the following description, the first to fifth embodiments described above may be applied to the sixth embodiment.

FIG. 27 is a side view illustrating a direct backlight unit 2010, a support main 40, and a bottom cover 20 according to an embodiment of the present application.

The quantum dot film 400 may be disposed on the reflective plate 300.

The light unit 3100 may be disposed on the quantum dot film 400. The light unit may include a first light unit 3101 and a second light unit 3102. The light source unit 2110 and the lens unit 2120 of the light unit 3100 may be disposed on the quantum dot film 400. The light source unit 2110 of the light unit 3100 may be in contact with the quantum dot film 400.

The direct type display device 3 described above can have an improved luminous efficiency. The quantum dot film 300 may receive light directly from the light source 110, so that the amount of modulated light emitted from the quantum dot film 300 may be increased.

In the above-described backlight unit and the display device including the same, the steps of configuring each embodiment are not essential, and therefore, each embodiment may optionally include the above-described steps. In addition, each step constituting each embodiment is not necessarily to be performed in the order described, the steps described later may be performed before the steps described first. It is also possible that any one step is performed repeatedly while each step is in operation.

In the above description of the configuration and features of the present invention based on the embodiment according to the present invention, the present invention is not limited thereto, and various changes or modifications can be made within the spirit and scope of the present invention. It will be apparent to those skilled in the art that such changes or modifications fall within the scope of the appended claims.

1: display device 2: direct display device
10: backlight unit 20: bottom cover
30: optical sheet 40: support main
50: display panel 60: printed circuit board
61: FC 70: Top Cover
100: light unit 110: light source
120: light drive unit 200: light guide plate
300,1300,2400: Reflector
400, 1400, 2400: quantum dot film 401: quantum dot powder
410: organism 411: first organism
412: second organism 415: organic center group
416: first organic center 417: second organic center
420: organic functional group 421, 425: first organic functional group
423, 426: second organic functional group 495: network
430: inorganic body 431: first inorganic body
432: Second weapon 435: weapon center
436: First Weapon Center 437: Second Weapon Center
440: inorganic functional group 441, 445: first inorganic functional group
443 and 446: second inorganic functional group 450: quantum dot
451: first quantum dot 452: second quantum dot
460: Quantum Core 461: Quantum Shell
462 ligand 470 chain molecule
471: first chain molecule 472: second chain molecule
480: head 481: tail
490: bead 491: bead shell
492: internal space 301: first region
303: second region 310: first base film
330: reflective film 350: second base film
500: air gap
1000: light modulation reflection film 1401: first quantum dot film
1402: second quantum dot film 1403: third quantum dot film
1404: fourth quantum dot film 2100, 3100: light unit
2101, 3101: first light unit 2102, 3102: second light unit
2110: direct backlight unit 2110: light source unit
2130: lens unit 2401: first hole
2402: second hole 2403: third hole
2404: fourth hole 2405: first quantum dot film
2406: second quantum dot film

Claims (1)

Light source;
A light guide plate on which the light source is disposed; And
And a light modulating reflecting film disposed under the light guide plate.
The optical modulated reflection film is a first base film; A quantum dot film disposed to be in contact with a lower portion of the first base film and including a quantum dot; Reflective film comprising a diffuse reflecting material; And a second base film disposed to contact the lower portion of the reflective film.
The reflective film comprising the diffuse reflecting material is characterized in that it is arranged to contact the quantum dot film,
Backlight unit.

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