KR20160059164A - Prism Sheet with the function of Barrier Film - Google Patents

Prism Sheet with the function of Barrier Film Download PDF

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Publication number
KR20160059164A
KR20160059164A KR1020140160685A KR20140160685A KR20160059164A KR 20160059164 A KR20160059164 A KR 20160059164A KR 1020140160685 A KR1020140160685 A KR 1020140160685A KR 20140160685 A KR20140160685 A KR 20140160685A KR 20160059164 A KR20160059164 A KR 20160059164A
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South Korea
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prism
layer
quantum dot
barrier film
refractive index
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KR1020140160685A
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Korean (ko)
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박철
부종욱
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(주)이노큐디
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Priority to KR1020140160685A priority Critical patent/KR20160059164A/en
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
    • C08J5/18—Manufacture of films or sheets
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/04—Prisms
    • G02B5/045—Prism arrays
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/0036—2-D arrangement of prisms, protrusions, indentations or roughened surfaces
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/0038—Linear indentations or grooves, e.g. arc-shaped grooves or meandering grooves, extending over the full length or width of the light guide
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133504—Diffusing, scattering, diffracting elements

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  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Optics & Photonics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Nonlinear Science (AREA)
  • Organic Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Medicinal Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Mathematical Physics (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Laminated Bodies (AREA)
  • Optical Elements Other Than Lenses (AREA)

Abstract

In order to solve the problem that the background of the display of the smart watch is black only, a conventional AMOLED display is used as a transparent AMOLED display, but a white panel ), A color panel, a black panel, a metal texture plate (Metallic Panel), and a color changing device.

Description

{Prism Sheet with the function of a barrier film}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a Quantum Dot sheet, and more particularly, to a quantum dot sheet which is positioned between a backlight used in an LCD display and a display, (Hereinafter referred to as " barrier film ").

As a technology for the background of the present invention, a barrier film is used. As an inorganic thin layer used as a laminate structure of a barrier film, a transparent inorganic thin film such as a metal oxide film, a metal nitride film or a metal fluoride film, Lt; / RTI >

In addition, Quantum DotSheet, which consists of two barrier films and a Quantum Dot Layer located between them, is used to extend the range of colors by positioning between the backlight of the LCD (liquid crystal display) and the display. will be.

The problem to be solved by the present invention is to minimize the increase in the price of the backlight by using the Quantum dot sheet as an LCD backlight.

In particular, LCD backlights have a complex structure such as reflective sheet, light guide plate, LED light source, prism sheet, and diffusion sheet. When Quantum Datesheet is added to this, the number of sheets increases and the price increases.

Therefore, it is necessary to use a Quantum Datesheet to minimize the price increase.

As a means for solving the problem of the present invention, a thin film of an inorganic material used in a quantum dot sheet barrier film, for example, a metal oxide film, an inorganic material transparent film such as a metal nitride film or a metal fluoride film is used as a refraction medium layer, To produce a barrier film.

Especially, two prism sheets are used for backlight of LCD, so integrating it with barrier film has a great effect on cost reduction.

For this purpose, in a structure of a barrier film used in a Quantum Dot Sheet, a primary prism structure is formed on a base film of a barrier film, a transparent inorganic thin film is coated on the primary prism structure .

The inorganic transparent thin film can be a single layer or a transparent organic thin film of a different kind and refractive index and can be coated in several layers and can be coated to a thickness of several hundred nanometers to several micrometers.

The size of the primary prism structure can be formed at a base of several tens of micrometers, for example, about 50 micrometers, and if the base is 50 micrometers, a height of about 25 micrometers is formed at a 45 degree angle.

As a transparent inorganic thin film, for example, SiO2 (1.46), Al2O3 (1.7), TiO2 (2.45), Ta2O5 (2.2), ZrO2 (2.05), HfO2 (2.0 ), Nb2O5 (2.33), Si3N4 (2.02), and MgF2 (1.38) can be coated by sputtering, E Beam Evaporation, PECVD, etc., You may.

The marked refractive index of each material varies depending on the film forming conditions and the wavelength range of light, and the refractive index is an approximate value.

The reason why the transparent inorganic thin film, which is a barrier layer, is applied as a refraction medium layer is to form a refraction medium layer having a refractive index different from that of the material forming the prism on the prism structure, so that the total reflection angle and refraction angle of the light can be adjusted.

In the present invention, the inorganic transparent thin film functioning as a refraction medium layer functions as a thin film material such as SiO 2 and controls the damage of the quantum dot by blocking oxygen or moisture penetration in the barrier film.

Therefore, in a conventional structure, in the structure of the barrier film, a metal oxide thin film such as SiO2 is coated on a base film such as PET, and the metal oxide thin film is coated with a transparent polymer resin again. The metal oxide thin film has a barrier layer (Barrier Layer) function.

In the present invention, a prism structure is formed of a transparent polymer resin on a base film, and a transparent inorganic thin film such as a metal oxide film, a metal oxide film, or a metal fluoride film is formed as a thin film on the prism structure as a barrier layer, .

In general, the refractive index of the transparent polymer resin has a value between a low refractive index of about 1.3 and a high refractive index of about 1.8.

The transparent polymer resin used in the prism structure usually uses a resin for ultraviolet curing and a refractive index of 1.5 to 1.8 is used.

The reason why the resin having a high refractive index is used is that the total reflection causes the light to be condensed upward while repeating reflections and refractions, which is the same as the general use of the prism sheet of the LCD backlight.

The barrier film according to the present invention is a structure for replacing the upper and lower prism sheets commonly used for the backlight as the upper and lower barrier films of the Quantum dot sheet.

In general, the prism sheet is divided into two sheets, and the direction of each prism sheet is the direction of intersection, and the prism structure faces the upper surface.

The optical means that the prism structure is directed to the upper surface is a medium like air like a medium outside the prism, and the prism must have a high refractive index so that the incident light is refracted and the light is condensed at an angle upward.

The upper prism film substitution structure in the composite structure of the prism according to the present invention and the barrier layer functioning as the refractive index layer is as follows.

In the present invention, the structure of the upper barrier film of the quantum dot sheet is a structure in which an inverted prism and a fixed prism are alternately formed, and a barrier layer between the inverted prism structure and the fixed prism structure functions to prevent penetration of oxygen and moisture And a structure formed to function as a refractive index layer together.

The refractive index of the inverse prism and the fixed prism formed on the upper barrier film of the quantum dot sheet according to the present invention has a higher refractive index than that of the inverse prism and the refractive index of the barrier layer, And may have a refractive index between the inverse prism and the stationary prism or a refractive index lower than that of the inverse prism, which can be determined according to the required condensing characteristics and total reflection characteristics.

Generally, the reverse prism has a refractive index of about 1.3 to 1.5, and the positive prism has a refractive index of 1.5 to 1.8.

When the refraction index of the prism structure is 1.6, the refractive index of the prism structure is 1.6, and when the refractive index of the prism is 1.38, the refractive index of the prism and MgF2 The refraction angle and the total reflection angle can be adjusted.

Or the refractive index of the prism is made to be 1.6, and when TiO2 having a refractive index of 2.2 or more is used as the material of the refraction medium layer, refraction only occurs at the interface between the prism and TiO2 without total reflection.

When SiO2 having a barrier layer of about 1.46 is coated with a refractive index medium, the refractive index difference from the refractive index of the prism material is small and the range of the total reflection angle is small.

As described above, the thin film used as the barrier layer functions as a refraction medium layer, so that optical refraction and total reflection in the prism structure can be controlled.

In the manufacturing process, a primary prism is formed on the base film of the upper barrier film of Quantum Dotsheet, a barrier layer made of an inorganic transparent film is coated by a method such as sputtering, Thereby forming a prism.

The reason why the secondary prism is in the opposite direction to the primary prism is that it is formed between the primary prisms, so that it becomes a secondary prism in the direction opposite to the primary prism, and this structure becomes the lower surface of the upper sheet of the quantum dot sheet The first prism becomes a reverse prism and the second prism becomes a forward prism.

With this structure, the upper barrier film of the Quantum dot sheet can be made into a prism structure-integrated type, thereby replacing a single prism sheet on the upper side as compared with the case of using two separate prism sheets.

The structure of the lower barrier film of the quantum dot sheet according to the present invention is similar to that of the upper barrier film, except that a positive prism and an inverse prism intersect with each other while a positive prism has a high refractive index, an inverse prism has a low refractive index relative to a positive prism, A barrier layer formed of a transparent inorganic coating layer functioning as a refractive-index layer is formed between the prisms.

As a method of forming the prism structure, a general prism forming method of forming a prism using a UV curable transparent resin using a prism mold can be used.

Accordingly, the present invention can reduce the thickness of the LCD backlight by allowing the Quantum dot sheet and the upper and lower prism sheets to be integrally formed, and it is possible to reduce the cost by not using the prism sheet separately.

The effect of the present invention is that the first prism and the second prism are formed on the upper barrier film and the lower barrier film of the quantum dot sheet respectively by using the barrier layer used for the barrier film of the quantum dot sheet as a refractive index layer, By eliminating the use of two sheets of prism sheet, manufacturing cost can be reduced, thickness can be reduced, and manufacturing process of backlight can be simplified.

1 is a structural view of e ink.
2 is a structure in which a transparent organic light emitting display and a color changing element are attached.
3 is a view showing a change in the color of the smart watch.
FIG. 4 shows a structure in which metal particles are coated with organic or inorganic materials.
5 is a structural view of a reflection type liquid crystal display.

A structure in which a Quantum Dot Sheet is mounted on an LCD for constituting the present invention is shown in FIG.

The backlight unit is composed of a reflective sheet 104, a light guide plate 105, a Quantum Dot Sheet, and a backlight unit 103. The backlight unit 103 includes an LCD panel 102 and a backlight unit 103, A first prism sheet 107, a second prism sheet 108, and a diffusion sheet 109 serving as a protective sheet.

Typically, the Quantum dot sheet is positioned below the prism sheet and is designed so that total reflection light reacts with quantum dot to cause color change.

Figure 2 shows a typical structure of a Quantum dot sheet.

The Quantum dot sheet 106 is composed of an upper barrier film 201, a Quantum Dot layer 202 at the lower part thereof, and a lower barrier film 203, and the four sides are sealed .

FIG. 3 shows the structure of a conventional barrier film.

The barrier film 301 is composed of a base film 302 such as a PET film and a metal oxide barrier layer 303 and an upper transparent polymer resin coating layer 304 on the base film.

Although not shown in the drawings, a base coating layer is usually formed between the base film and the barrier layer.

The role of the barrier film is to protect the quantum dot by preventing penetration of oxygen and moisture.

An important layer in the function of the barrier film uses a metal oxide layer such as SiO2 as a barrier layer.

A single layer may be used, or another kind of metal oxide layer such as SiO2, Al2O3 or the like may be laminated.

The reason for coating such a metal oxide layer is that a polymer material such as a base film or a transparent coating layer is generally vulnerable to penetration of oxygen and moisture.

Therefore, the Quantum Dot Sheet is a structure in which the Quantum Dot layer is placed between both barrier films and protected from oxygen and moisture penetration.

In the present invention, not only a barrier layer such as a metal oxide layer functions as a barrier function but also functions as a refracting medium in a light collecting function, which is a basic function of a backlight, to perform functions according to an optical design.

This is because two prism sheets are basically used for the backlight, and a separate Quantum dot sheet is used to solve problems such as an increase in cost and an increase in thickness.

In the present invention, the prism structure in the drawing has a crossing structure and the like in each drawing, the front sectional view and the side sectional view are shown as symbols of (a) and (b), meaning that they intersect when two prisms are actually used, The frontal and lateral directions may vary depending on the structure.

FIG. 4 shows a structure in which an inverted prism and a fixed prism intersect in the upper barrier film structure according to the present invention, and a barrier layer is formed as a transparent inorganic coating layer between an inverse prism and a stationary prism.

As shown in the figure, an inverted prism 402 formed of a transparent polymer resin is formed on the lower part of the base film 401, a transparent inorganic coating layer 403 is formed on the surface of the inverted prism, A structure of the positive prism 404 by the polymer resin is formed.

As shown in the drawings, the upper barrier film of the quantum dot sheet according to the present invention has a structure in which an inverted prism 402 and a fixed prism 404 are alternately formed, and a transparent inorganic coating layer Inorganic Coating Layer (403) It functions as a barrier layer and functions as a refractive-index layer together with a function of preventing penetration of oxygen and moisture.

The refractive index of the inverse prism and the fixed prism formed on the upper barrier film of the quantum dot sheet of the present invention is higher than that of the inverse prism 402 of the positive prism 404 and the refractive index of the barrier layer, A refractive index between the inverse prism and the stationary prism, or a refractive index lower than the inverse prism, which can be determined according to the required light collecting characteristics and total reflection characteristics.

Generally, the reverse prism has a refractive index of about 1.3 to 1.5, and the positive prism has a refractive index of 1.5 to 1.8.

When the refraction index of the prism structure is 1.6, the refractive index of the prism structure is 1.6, and when the refractive index of the prism is 1.38, the refractive index of the prism and MgF2 The refraction angle and the total reflection angle can be adjusted.

Or the refractive index of the prism is made to be 1.6, and when TiO2 having a refractive index of 2.2 or more is used as the material of the refraction medium layer, refraction only occurs at the interface between the prism and TiO2 without total reflection.

When SiO2 having a barrier layer of about 1.46 is coated with a refractive index medium, the refractive index difference from the refractive index of the prism material is small and the range of the total reflection angle is small.

As described above, the thin film used as the barrier layer functions as a refraction medium layer, so that optical refraction and total reflection in the prism structure can be controlled.

In the manufacturing process, the primary prism 402, which is an inverted prism, is formed on the base film of the upper barrier film of the Quantum Dot Sheet, the barrier layer 403 made of a thin film of transparent inorganic material is coated by a method such as sputtering, And forms a secondary prism 404 which is opposite to the prism and functions as a positive prism.

The method of forming a primary prism is a method of forming a conventional prism, in which a base film is coated with an ultraviolet curable polymer resin, and a prism structure is formed by adhering the ultraviolet curable polymer resin to the prism original plate before curing, And a prism structure is formed by being separated from the original plate.

The method of forming the second crystal prism is a structure in which a transparent inorganic material is coated in a state where the first prism is formed, and then the ultraviolet curing type polymer resin is coated by roll to roll coating.

At this time, the thickness of the coating layer for forming the secondary prism should be thicker than that of the primary prism.

For example, if the height of the primary prism is 25 micrometers, the thickness of the inorganic thin film layer can be adjusted from 0.01 micrometer to 1 micrometer, and the thickness of the coating layer for forming the secondary prism structure is about 25 micrometers to 50 micrometers .

The reason why the secondary prism is in the opposite direction to the primary prism is that it is formed between the primary prisms and thus becomes a secondary prism in the direction opposite to the primary prism. Such a structure is located on the upper portion of the quantum dot sheet, The second prism becomes a forward prism.

Since the secondary prism is formed by coating, the surface on which the quantum dot layer, which is the opposite surface 405 of the prism, is formed becomes the planarized surface.

With this structure, the upper barrier film of the Quantum dot sheet can be made into a prism structure-integrated type, thereby replacing a single prism sheet on the upper side as compared with the case of using two separate prism sheets.

Further, in the present invention, a diffusion layer may be formed on the opposite surface of the prism coating layer of the upper barrier film.

This structure is shown in Fig.

As shown in the drawing, an inverted prism 402 formed of a transparent polymer resin is formed on the lower part of the base film 401, a transparent inorganic coating layer 403 is formed on the surface of the inverted prism, A positive prism 404 structure is formed by a polymer resin, and a diffusion layer 501 is coated on the opposite side of the prism structure.

Like the upper barrier film of the Quantum D & S sheet, the lower barrier film is made of a structure in which the stationary prism and the reverse prism intersect, and a transparent organic thin film is formed between the stationary prism and the reverse prism, do.

A diagram of this is shown in Fig.

FIG. 6 shows a structure of a lower barrier film structure according to the present invention in which an inverted prism and a stationary prism cross each other, and a barrier layer is formed as a transparent inorganic coating layer between an inverse prism and a stationary prism.

As shown in the figure, a positive prism 602 formed of a transparent polymer resin is formed on the base film 601, a transparent inorganic coating layer 603 is formed on the surface of the positive prism, An inverse prism 604 structure based on a polymer resin is formed.

As shown in the figure, in the present invention, the structure of the lower barrier film of the quantum dot sheet is a structure in which a positive prism 602 and an inverse prism 604 are alternately formed, and a transparent inorganic coating layer Inorganic Coating Layer (603) It functions as a barrier layer and functions as a refractive-index layer together with a function of preventing penetration of oxygen and moisture.

The refractive index of the inverse prism and the fixed prism formed on the lower barrier film of the quantum dot sheet of the present invention has a higher refractive index than the inverse prism 602 and the refractive index of the barrier layer, A refractive index between the inverse prism and the stationary prism, or a refractive index lower than the inverse prism, which can be determined according to the required light collecting characteristics and total reflection characteristics.

Generally, the reverse prism has a refractive index of about 1.3 to 1.5, and the positive prism has a refractive index of 1.5 to 1.8.

When the refraction index of the prism structure is 1.6, the refractive index of the prism structure is 1.6, and when the refractive index of the prism is 1.38, the refractive index of the prism and MgF2 The refraction angle and the total reflection angle can be adjusted.

Or the refractive index of the prism is made to be 1.6, and when TiO2 having a refractive index of 2.2 or more is used as the material of the refraction medium layer, refraction only occurs at the interface between the prism and TiO2 without total reflection.

When SiO2 having a barrier layer of about 1.46 is coated with a refractive index medium, the refractive index difference from the refractive index of the prism material is small and the range of the total reflection angle is small.

As described above, the thin film used as the barrier layer functions as a refraction medium layer, so that optical refraction and total reflection in the prism structure can be controlled.

In the manufacturing process, the primary prism 602 serving as a positive prism is formed on the base film of the lower barrier film of the Quantum Dotsheet, the barrier layer 603 made of a transparent inorganic thin film is coated by a method such as sputtering, And forms a secondary prism 604 which is opposite to the prism and functions as an inverse prism.

The method of forming a primary prism is a method of forming a conventional prism, in which a base film is coated with an ultraviolet curable polymer resin, and a prism structure is formed by adhering the ultraviolet curable polymer resin to the prism original plate before curing, And a prism structure is formed by being separated from the original plate.

The method of forming the second-order inverse prism is a structure in which a transparent inorganic material is coated in a state in which the first prism is formed, and then a UV-curable polymer resin is coated by roll-to-roll coating.

At this time, the thickness of the coating layer for forming the secondary prism should be thicker than that of the primary prism.

For example, if the height of the primary prism is 25 micrometers, the thickness of the inorganic thin film layer can be adjusted from 0.01 micrometer to 1 micrometer, and the thickness of the coating layer for forming the secondary prism structure is about 25 micrometers to 50 micrometers .

The reason why the secondary prism is in the opposite direction to the primary prism is that it is formed between the primary prisms and thus becomes a secondary prism in the direction opposite to the primary prism. Such a structure is located at the lower portion of the quantum dot sheet, The second prism becomes a forward prism, and the second prism becomes a backward prism.

Since the secondary prism is formed by coating, the surface on which the quantum dot layer, which is the opposite surface 605 of the secondary prism, is formed becomes the planarized surface.

With this structure, the upper barrier film of the Quantum dot sheet can be made into a prism structure-integrated type, so that a lower prism sheet can be substituted as compared with the case of using two separate prism sheets.

Further, in the present invention, a diffusion layer may be formed on the opposite surface of the prism coating layer of the lower barrier film.

This structure is shown in Fig.

As shown in the figure, a positive prism 602 formed of a transparent polymer resin is formed on the base film 601, a transparent inorganic coating layer 603 is formed on the surface of the positive prism, A reverse prism 604 structure is formed by a polymer resin, and a diffusion layer 701 is coated on the opposite side of the prism structure.

FIG. 8 shows a structure in which a prism structure according to the above structure is formed on an upper barrier film and a lower barrier film.

8, a reverse prism 402 formed of a transparent polymer resin is formed on a lower portion of the base film 401 of the upper barrier film, a transparent inorganic coating layer 403 is formed on the surface of the reverse prism, A quantum dot layer 801 is formed in a structure in which a planarizing surface 501 is formed on the opposite surface of the positive prism and a positive prism 404 structure is formed by a transparent polymer resin next to the inorganic coating layer, As the lower barrier film, a positive prism 602 formed of a transparent polymer resin is formed on the base film 601 of the lower barrier film, a transparent inorganic coating layer 603 is formed on the surface of the positive prism, And a quantum dot layer is formed on the planarization layer 701 opposite to the inverse prism structure.

The quantum dot layer may be formed between the upper barrier film and the lower barrier film formed with the prism according to the present invention.

In the above description of the invention and drawings, a prism structure is shown as a straight line of a triangle, but a variety of structures such as a curved structure including a linear structure, a part of a cylinder, or a hemispherical shape are possible.

Fig. 9 shows an example of such a structure.

As shown in FIG. 9, the structures of the upper prism 902 and the lower prism 903 having the quantum dot layer 901 therebetween have curved surfaces 904 and 905, respectively, and the manufacturing method is the same as or similar to the linear prism.

In the structure according to the present invention, a primary optical structure including a prism is formed on an upper barrier film or a lower barrier film, and a thin film of a transparent inorganic material is coated on the primary optical structure with a single layer or a laminate layer with a thickness of 0.01 micrometer to 1 micrometer , The transparent inorganic thin film functions as a refracting medium, and a second optical structure is formed on the second optical structure by a coating as compared with the first optical structure, and the opposite side of the optical structure has a planarizing surface.

The primary optical structure may be any structure in which optical refraction occurs such as a linear prism structure, a curved prism structure, a hemispherical shape, a triangular prism shape, a quadrangular pyramidal shape, or a cylindrical shape.

In the first optical structure formed with the transparent inorganic thin film layer as the barrier layer, the second optical structure effect is shown at the interface with the transparent inorganic thin film by coating the transparent resin, and the opposite side of the second optical structure is formed with the planarization layer, Coating.

8, the quantum dot layer is formed on the surface of the upper barrier film and the lower barrier film where the optical structure is formed. However, the quantum dot layer may be formed on the surface of the upper barrier film and the lower barrier film, Sheets are possible.

In FIG. 10, a prism is formed on the opposite side of the quantum dot layer in the upper barrier film, and a primary and secondary prism structure having a planarization layer according to the present invention and a barrier layer are formed therebetween.

10, a prism structure 1002 is formed on the upper barrier film 1001 of the quantum dot sheet, a barrier layer 1003 and a protective coating layer 1004 are formed on the lower portion of the upper barrier film, Next, a quantum dot layer 801 is formed. In the lower barrier film 1005 below the quantum dot layer, a positive prism 602 formed of a transparent polymer resin is formed on the base film 601, A transparent inorganic coating layer 603 as a barrier layer is formed on the surface of the static prism, a reverse prism 604 structure formed by a transparent polymer resin is formed next to the transparent inorganic coating layer, a planarization layer 701 on the opposite surface of the reverse prism structure, A quantum dot layer is formed in the structure.

11, a prism structure 1002 is formed on the upper barrier film 1101 of the quantum dot sheet, an inverted prism 402 formed of a transparent polymer resin is formed on the lower part of the upper barrier film, A transparent inorganic coating layer 403 is formed on the surface of the prism, a positive prism 404 structure is formed by a transparent polymer resin next to the transparent inorganic coating layer, and a planarizing surface 501 is formed on the opposite side of the positive prism A quantum dot layer 801 is formed and a barrier layer 1103 and a protective coating layer 1104 are formed on the lower barrier film 1102 toward the quantum dot layer.

12, a prism structure 1002 is formed on the upper barrier film 1001 of the quantum dot sheet, a barrier layer 1003 and a protective coating layer 1004 are formed on the lower part of the upper barrier film, Next, a quantum dot layer 801 is formed. In the lower barrier film 1201 under the quantum dot layer, a reverse prism 1203 formed of a transparent polymer resin is formed under the base film 1202, A transparent inorganic coating layer 1204 is formed on the surface of the reverse prism and a positive prism 1205 structure formed by a transparent polymer resin is formed next to the transparent inorganic coating layer.

A diffusion layer may be further coated on the lower surface of the prism structure.

As a structure like the one shown in the above, conventionally, two quantum dot sheet and prism sheet separately can be integrated into one piece of Quantum dot sheet.

The light-diffusing layer may be formed with various additional coatings in the above-described inventive structure, which is included as an additional function of the present invention.

In the present invention, the transparent inorganic thin film of the barrier layer functioning as the refractive index layer can use various materials. Examples of transparent inorganic thin films include metal oxide films such as metal nitride films and metal fluoride films. Examples of transparent thin films include SiO 2 (1.46 ), Al2O3 (1.7), TiO2 (2.45), Ta2O5 (2.2), ZrO2 (2.05), HfO2 (2.0), Nb2O5 (2.33), Si3N4 (2.02), MgF2 Beam Evaporation, PECVD, etc., and may be coated with a single layer or multiple layers may be coated with a laminate.

Refractive medium layer means a layer which is formed between two optical structures and has a refractive index different from that of one or more optical structures so as to function to cause optical refraction or the like at an interface of a material having a different refractive index.

In the drawings of the present invention, the prism structure has an intersecting structure or the like. In each drawing, the front sectional view and the side sectional view are denoted by the symbols (a) and (b), meaning that they are actually used when two prisms are used , The frontal direction and the lateral direction may vary depending on the structure.

Although the upper barrier film and the lower barrier film have a prism structure, the prism structure according to the present invention can be formed only on the upper barrier film according to the use of the upper barrier film and the lower barrier film. The barrier film structure according to the present invention can be formed only on the film.

As described above, in the backlight structure of a liquid crystal display using a quantum dot sheet according to the present invention, one or two functions of a prism sheet can be integrated into a quantum dot sheet.

101: LCD display 102: LCD panel
103; Backlight unit 104: reflective sheet
105: light guide plate 106: Quantum dot sheet
107: first prism sheet 108: second prism sheet
109: diffusion sheet 201: upper barrier film
202: Quantum dot layer 203: Barrier film
301: a barrier film 302: a base film
303: Barrier layer 304: Coating layer
401: base film 402: reverse prism
403: transparent inorganic coating layer 404: positive prism
501: diffusion layer 601: base film
602: Crystal prism 603: Transparent inorganic coating layer
604: reverse prism 701: diffusion layer
901: Quantum dot layer 902: upper prism
903: Lower prism 904, 905: Curved prism
1001: upper barrier film 1002: prism structure
1003: barrier layer 1004: protective coating layer
1005: Lower barrier film 1101: Upper barrier film
1102: lower barrier film 1103: barrier layer
1104: protective coating layer 1201: lower barrier film
1202: base film 1203: reverse prism
1204: Transparent inorganic coating layer 1205:

Claims (10)

In an optical structure having a prism sheet function of a Quantum Dot Sheet used for a backlight of a liquid crystal display,
A reverse polarizer 402 formed of a transparent polymer resin is formed on the lower part of the base film 401 of the upper barrier film of the Quantum Dot sheet, a transparent inorganic coating layer 403 is formed on the surface of the reverse polarizer, Next, a quantum dot sheet for a backlight of a liquid crystal display, wherein a structure of a positive prism (404) by a transparent polymer resin is formed.
The method according to claim 1,
The refraction index of the inverse prism and the refraction prism formed in the upper barrier film of the Quantum Dot sheet has a higher refractive index than the inverse prism 402 and the refractive index of the refraction mediation layer is higher than that of the refraction prism Or a refractive index between an inverse prism and a stationary prism or a refractive index lower than that of an inverse prism, or a quantum dot sheet for a backlight of a liquid crystal display.
The method according to claim 1,
A positive prism is formed by coating,
And the surface on which the quantum dot layer, which is the opposite surface (405) of the stationary prism, is formed becomes a planarized surface.
The method according to claim 1,
And a diffusion layer (501) is formed on the opposite surface of the prism coating layer of the upper barrier film.
In an optical structure having a prism sheet function of a Quantum Dot Sheet used for a backlight of a liquid crystal display,
In the lower barrier film structure of the quantum dot sheet, a positive prism 602 formed of a transparent polymer resin is formed on the base film 601 of the lower barrier film, and a transparent inorganic coating layer 603 is formed on the surface of the positive prism A reverse prism 604 structure formed by a transparent polymer resin is formed next to the transparent inorganic coating layer,
The refractive index of the inverse prism and the fixed prism formed on the lower barrier film is higher than that of the inverse prism 602. The refractive index of the barrier layer as the refractive index layer is higher than the refractive index of the inverse prism 602, The prism having a refractive index between the prism and the prism or having a refractive index lower than that of the prism,
And the surface on which the quantum dot layer is formed, which is the opposite surface (605) of the inverse prism, is a planarized surface because the inverse prism is formed by coating.
The method of claim 5,
And a diffusion layer (701) is formed on the opposite surface of the prism coating layer of the lower barrier film.
In an optical structure having a prism sheet function of a Quantum Dot Sheet used for a backlight of a liquid crystal display,
A prism structure 1002 is formed on the upper barrier film 1001 of the Quantum Dot sheet and a barrier layer 1003 and a protective coating layer 1004 are formed under the upper barrier film. A positive prism 602 formed of a transparent polymer resin is formed on the base film 601 in the lower barrier film 1005 below the quantum dot layer, A transparent inorganic coating layer 603 which is a barrier layer is formed and a reverse prism 604 structure by a transparent polymer resin is formed next to the transparent inorganic coating layer and a quantum dot layer is formed on the planarization layer 701 opposite to the reverse prism structure Wherein the quantum dot structure of the quantum dot structure for backlight of the liquid crystal display.
In an optical structure having a prism sheet function of a Quantum Dot Sheet used for a backlight of a liquid crystal display,
A prism structure 1002 is formed on an upper portion of the upper barrier film 1101 of the Quantum Dot Sheet, an inverted prism 402 formed of a transparent polymer resin is formed on the lower portion of the upper barrier film, The inorganic coating layer 403 is formed next to the transparent inorganic coating layer and the positive prism 404 structure is formed by the transparent polymer resin and the planarizing surface 501 is formed on the opposite surface of the positive prism, And a barrier layer 1103 and a protective coating layer 1104 are formed on the quantum dot layer of the lower barrier film 1102. The quantum dot layer for a backlight of a liquid crystal display according to claim 1,
In an optical structure having a prism sheet function of a Quantum Dot Sheet used for a backlight of a liquid crystal display,
A prism structure 1002 is formed on the upper barrier film 1001 of the Quantum Dot sheet and a barrier layer 1003 and a protective coating layer 1004 are formed under the upper barrier film. And an inverted prism 1203 formed of a transparent polymer resin is formed on a lower portion of the base film 1202 in the lower barrier film 1201 under the quantum dot layer. A transparent inorganic coating layer 1204 is formed, and a transparent prism 1205 structure formed by a transparent polymer resin is formed next to the transparent inorganic coating layer.
And a diffusion layer is further coated on the lower surface of the prism structure.
The prism structure according to any one of claims 1 to 5 to 7 to 8,
Wherein the prism structure is any structure in which optical refraction such as a linear prism structure, a curved prism structure, a hemispherical shape, a triangular prism shape, a quadrangular pyramidal shape, or a cylindrical shape occurs.

KR1020140160685A 2014-11-18 2014-11-18 Prism Sheet with the function of Barrier Film KR20160059164A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020177787A3 (en) * 2019-09-27 2020-10-22 南京贝迪电子有限公司 Quantum dot composite brightness enhancement film and preparation method therefor
CN114509897A (en) * 2022-02-18 2022-05-17 南京贝迪新材料科技股份有限公司 Quantum dot brightening composite film and preparation method thereof

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020177787A3 (en) * 2019-09-27 2020-10-22 南京贝迪电子有限公司 Quantum dot composite brightness enhancement film and preparation method therefor
CN114509897A (en) * 2022-02-18 2022-05-17 南京贝迪新材料科技股份有限公司 Quantum dot brightening composite film and preparation method thereof
CN114509897B (en) * 2022-02-18 2023-08-29 南京贝迪新材料科技股份有限公司 Quantum dot brightening composite film and preparation method thereof

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