KR102067162B1 - Film for improving color sense and method for preparing the same - Google Patents

Abstract

The present invention is a substrate layer; A high refractive resin layer having an optical pattern formed on one surface thereof; And a low refractive resin layer comprising a light diffusing agent; a color improving film in which the high refractive resin layer formed by sequentially stacking the optical pattern and the low refractive resin layer in which the light diffusing agent is dispersed, and a base layer are laminated. Manufacturing a high refractive resin layer by coating a high refractive transparent resin on one surface and forming an intaglio optical pattern; Dispersing the light diffusing agent into the low refractive transparent resin to prepare a low refractive light diffusing layer; And bonding one surface of the low refractive light diffusing layer to a surface on which the optical pattern of the high refractive resin layer is formed. The color improving film of the present invention includes a color change according to a viewing angle. It is less, excellent in light transmittance and light diffusivity, and the manufacturing method is excellent in fairness and economic efficiency.

Description

Color improving film and its manufacturing method {FILM FOR IMPROVING COLOR SENSE AND METHOD FOR PREPARING THE SAME}

The present invention relates to a color improving film and a method of manufacturing the same, and more particularly, to a color improving film having a small color change according to a viewing angle and a method of manufacturing the same.

The liquid crystal light emitting device displays a color and an image by arranging a panel in which a regular array of liquid crystals forming a screen is placed in a flat tempered glass, and a back light behind the panel emits light. More specifically, the light emitted from the backlight passes through numerous liquid crystals and is refracted in various patterns, and then the light passes through a filter located in front of the liquid crystal to form pixels of different colors and brightness (full pixels). Configure The liquid crystal light emitting device has excellent image quality and low production cost, but has been continuously pointed out as disadvantages due to the complexity of the process, slow response speed, narrow viewing angle, and high power consumption.

Organic light-emitting device display has been in the spotlight as a next-generation display that compensates for the disadvantages of liquid crystal displays (LCDs). The organic light emitting device implements color by using characteristics of expressing R, G, and B according to organic materials by using light emitting characteristics that emit light when a current flows through a fluorescent organic compound. Its high resolution, wide viewing angle, and low power drive make it possible to express a natural image without remaining afterimages due to its fast response speed. Therefore, it is widely used in general digital TV as well as portable devices. However, an organic light emitting display such as an OLED TV may change color depending on the viewing angle.

Korean Patent Laid-Open No. 2012-0081362 discloses a plurality of intaglio lens portions formed in a spaced apart space from each other and a background layer constituting a layer to improve color change according to a viewing angle of a liquid crystal display. It is characterized in that the filling portion and the background and the filling portion has a different refractive index, but this prior art requires that the aspect ratio of the lens is quite large in order to obtain a color improvement effect, bite processing and roll processing using such bite is easy The reality is that if the mass production is taken into consideration, the cost of production will inevitably rise due to the sudden drop in yield. In addition, the difference in refractive index between the two resins should be maximized for sufficient color improvement. High refractive resins have a problem with adhesion to the film during processing using rolls, and low refractive resins are not cured at high cost due to manufacturing difficulties and during the manufacturing process. There is a problem.

Therefore, there is an urgent need to develop an optical film for an organic light emitting display device which has excellent fairness and economical efficiency and little color change depending on the viewing angle.

An object of the present invention is to provide a color improving film with less change in color depending on the viewing angle.

Another object of the present invention is to provide a color improving film excellent in light transmittance and light diffusivity.

Still another object of the present invention is to provide a color improving film having excellent reliability.

Still another object of the present invention is to provide a method for producing a color improving film having excellent processability and economy.

The above and other objects of the present invention can be achieved by the present invention described below.

One aspect of the invention is a substrate layer; A high refractive resin layer on which an optical pattern is formed; And a low refractive light diffusing layer including a light diffusing agent are sequentially stacked, and an optical pattern is engraved on one surface of the high refractive resin layer facing the low refractive light diffusing layer.

The high refractive resin layer may include an ultraviolet curable transparent resin having a refractive index of 1.50 to 1.60.

The low refractive light diffusion layer may include an ultraviolet curable transparent resin having a refractive index of 1.35 to 1.45.

The optical pattern is composed of a plurality of lenticular concave lenses, the lenticular concave lens has a width (D) of 1 μm to 1,000 μm, a depth (H) of 1 μm to 2,000 μm, and an aspect ratio (H / D) of 1 To 3 may be.

The optical pattern may have a separation distance L between neighboring lenticular concave lenses, and a ratio L / D of the separation distance L and the width D of the lenticular concave lens may be 3.0 or less.

The high refractive resin layer and the low refractive resin layer may include an ultraviolet curable resin having an acrylate functional group.

The light diffusing agent is an organic light diffusing agent, an inorganic light diffusing agent, or a mixture thereof,

The organic light diffusing agent includes at least one selected from the group consisting of acrylic particles, siloxane particles, melamine particles, polycarbonate particles, and styrene-based particles,

The inorganic light diffusing agent may include one or more selected from the group consisting of calcium carbonate, barium sulfate, titanium dioxide, aluminum hydroxide, silica, glass, talc, mica, white carbon, magnesium oxide, and zinc oxide.

The organic light diffusing agent may have an average particle diameter (D50) of 2 µm to 20 µm.

The organic light diffusing agent includes polymer particles coated with black dye and uncoated particles, the polymer particles coated with black dye are polymethylmethacrylate (PMMA) particles, and the uncoated particles are silicon-based particles. , Acrylic particles, or a mixture thereof.

The organic light diffusing agent may include polymer particles and uncoated particles coated with the black dye in a weight ratio of 1: 4 to 4: 1.

The light diffusing agent may be included in 0.1 to 10% by weight of the light diffusing layer.

The substrate layer may have a thickness of 30 μm to 100 μm, the maximum thickness of the high refractive resin layer may be 5 μm to 80 μm, and the thickness of the low refractive light diffusion layer may be 5 μm to 50 μm.

An adhesive layer may be further stacked on one surface of the low refractive light diffusing layer.

The base layer may include TAC (TriAcetate Cellulose), polyethylene terephthalate (PET), polycarbonate (PolyCarbonate, PC), or polyvinyl chloride (PVC).

Another aspect of the present invention after the step of coating a high refractive index transparent resin on one surface of the substrate layer to form a negative optical pattern to produce a high refractive resin layer; Dispersing the light diffusing agent into the low refractive transparent resin to prepare a low refractive light diffusing layer; And bonding one surface of the low refractive light diffusing layer to the surface on which the optical pattern of the high refractive resin layer is formed.

The method may further include forming an adhesive layer by applying an adhesive to the other surface of the light diffusion layer.

The high refractive index transparent resin may be an ultraviolet curable transparent resin having a refractive index of 1.50 to 1.60, and the low refractive index transparent resin may be an ultraviolet curable transparent resin having a refractive index of 1.35 to 1.45.

Still another aspect of the present invention provides a display device comprising: an organic light emitting film formed between a first electrode, a second electrode facing the first electrode, and the first electrode and the second electrode; And a color improving film according to any one of claims 1 to 16, which is provided on the light exit surface of the second electrode, and includes an organic light emitting device having a resonance structure to implement an image with colors reflected from each pixel of the organic light emitting film. It relates to a display device.

The organic emission layer may include a hole injection layer (HIL), a hole transport layer (HTL), an emission layer (EML), an electron transport layer (ETL), and an electron injection layer (Electron Injection). Layer, EIL) may be sequentially stacked.

The color improving film of the present invention has little color change depending on the viewing angle, is excellent in light transmittance, light diffusivity and reliability, and the manufacturing method is excellent in fairness and economic efficiency.

1 shows a cross-sectional view of a color improving film according to an embodiment of the present invention.
Figure 2 shows a perspective view of a high refractive resin layer formed with an optical pattern according to an embodiment of the present invention.
FIG. 3A is a perspective view of an optical pattern in which a separation distance exists between neighboring lenticular concave lenses, and FIG. 3B is a cross-sectional view of a color improving film including the same.
Figure 4 shows a cross-sectional view of a color improving film according to another embodiment of the present invention.
5 is a graph showing ΔU′V ′ values according to viewing angles of the color improving films of Examples and Comparative Examples.
6 schematically illustrates an organic light emitting diode display device according to an embodiment of the present invention.
FIG. 7A is a conceptual diagram illustrating a resonance structure, and FIG. 7B is a graph showing a distribution of transmittances according to light wavelengths.

Hereinafter, embodiments of the color improving film according to the present invention will be described with reference to the accompanying drawings.

In this process, the thickness of the lines or the size of the components shown in the drawings may be exaggerated for clarity and convenience of description.

In addition, terms to be described later are terms defined in consideration of functions in the present invention, which may vary according to a user's or operator's intention or custom.

Therefore, definitions of these terms should be made based on the contents throughout the specification.

Hereinafter, a color improving film of the present invention will be described with reference to the drawings.

Color improvement film

1 shows a cross-sectional view of a color improving film according to an embodiment of the present invention. Referring to FIG. 1, the color improving film includes a base layer 100; A high refractive resin layer 110 having an optical pattern formed thereon; And a low refractive light diffusing layer 120 comprising a light diffusing agent 121; The layers are sequentially stacked and have a structure in which an optical pattern is engraved on one surface of the high refractive resin layer facing the low refractive light diffusing layer.

The base layer 100 is preferably a transparent resin film or glass substrate having ultraviolet light transmission having a light incidence surface and a light emission surface opposite to the light incidence surface. The material may be TAC (TriAcetate Cellulose), polyethylene terephthalate (PET), polycarbonate (PolyCarbonate, PC), polyvinyl chloride (PVC), or the like, and may be a single layer or multiple layers.

The base layer may have a thickness of 30 μm to 100 μm.

The high refractive resin layer 110 having the optical pattern formed thereon includes a high refractive resin layer and an optical pattern formed on one surface of the high refractive resin layer. The high refractive resin layer may be formed of an ultraviolet curable transparent resin having a refractive index of 1.50 to 1.60.

The optical pattern may be intaglio formed on one surface of the high refractive resin layer 110 facing the low refractive light diffusing layer 120. The engraved optical pattern may be one or more selected from the group consisting of micro lenses, cones, cone frames, cylinder lenses, prisms, and round prisms, but is not necessarily limited thereto. However, light having high color purity among the light incident on the panel may be emitted in a direction perpendicular to the light exit surface. In order to diffuse the light having high color purity more widely, it is preferable to use a micro concave lens. The micro-concave lens may be at least one of a semi-circular cross-sectional lenticular lens, a semi-circular cross-sectional dot lens, a semi-circular cross-sectional stripe lens, a semi-circular cross-sectional wavy lens, but preferably a semi-circular cross-sectional lenticular lens.

2 is a perspective view of a high refractive resin layer in which an optical pattern is formed according to an embodiment of the present invention, in which an optical pattern including a plurality of lenticular concave lenses 111 is applied. Referring to FIG. 2, a lenticular concave lens 111 is intaglio formed on one surface of the high refractive resin layer 110, and the lenticular concave lens 111 has a hemispherical cross-sectional shape having a width D and a depth H. Can be. The width D of the lenticular concave lens may be 1 μm to 1,000 μm, and the depth H may be 1 μm to 2,000 μm. Further, in the present invention, when the aspect ratio of the lenticular concave lens is defined as H (lens depth) / D (lens width), the lenticular concave lens of the present invention has an aspect ratio of 1 to 3, preferably 1.5 to It may have an aspect ratio of 2.5. The high refractive resin layer 110 may have a thickness of about 5 μm to about 80 μm.

The space occupied by the lenticular concave lens in the color improving film is filled with air, and since the refractive index of air is 1, the difference between the high refractive index resin layer and the refractive index is increased without using a low refractive index transparent resin, thereby contributing to the color improvement effect. At the same time, there is no need for a separate filling process, thus increasing process efficiency.

FIG. 3A is a perspective view of an optical pattern pattern in which a separation distance exists between neighboring lenticular concave lenses, and FIG. 3B is a cross-sectional view of a color improving film including the same. Referring to FIG. 3A, a plurality of lenticular concave lenses 133 may be arranged at a predetermined distance L between neighboring lenticular concave lenses 111. The ratio L / D of the separation distance L and the width D of the lenticular concave lens may be 3.0 or less, and preferably 1.0 to 2.0. Color change improvement effect according to the viewing angle in the above range can be maximized.

In addition, it is advantageous to use a lens having a high aspect ratio in order to obtain a color improvement effect, but there may be a problem in the process that the bite processing and the roll processing using such a bite are not easy, and the yield decreases sharply when considering mass production. It is not economical. According to the present invention, an excellent color improvement effect can be realized even by using an optical pattern having a relatively low aspect ratio by introducing a low refractive light diffusing layer.

The low refractive light diffusing layer 120 may be stacked on the surface on which the optical pattern of the high refractive resin layer 110 is formed, and may be formed of a light diffusing agent and an ultraviolet curable transparent resin having a refractive index of 1.35 to 1.45.

As the light diffusing agent 121 included in the low refractive light diffusing layer 120, an organic light diffusing agent or an inorganic light diffusing agent may be used, and the light diffusing agent 121 may be mixed and used for diffusing and transmissive properties. The organic light diffusing agent may use acrylic particles, siloxane particles, melamine particles, polycarbonate particles, styrene particles, or the like, and these may be used alone or in combination. The organic light diffusing agent may be spherical crosslinked fine particles having an average particle diameter (D50) of 2 to 20 μm. The inorganic light diffusing agent may be added to prevent a decrease in whiteness of the final resin composition generated when adding the spherical organic light diffusing agent and to increase light diffusivity. In this case, since the fairness decreases as the amount of the inorganic light diffusing agent increases, an appropriate amount should be added. As an example, the inorganic light diffusing agent may be calcium carbonate, barium sulfate, titanium dioxide, aluminum hydroxide, silica, glass, talc, mica, white carbon, magnesium oxide, zinc oxide, and the like, but is not limited thereto. .

In one embodiment, the organic light diffusing agent may include polymer particles coated with a black dye. However, since the use of the polymer particles coated with the black dye alone may lower the light transmittance and cause a decrease in brightness, the uncoated particles may further include silicon particles, acrylic particles or a mixture thereof, and may be coated with a black dye. The mixed polymer particles and the uncoated polymer particles may be mixed in an appropriate amount to adjust brightness, color difference according to viewing angle, contrast ratio, and reflection color. Preferably, polymethyl methacrylate (PMMA) particles coated with a black dye; And a light diffusing agent including silicon particles, acrylic particles, or mixtures thereof in a weight ratio of 1: 4 to 4: 1 as uncoated polymer particles.

In particular, when the optical pattern is a lenticular concave lens pattern, color improvement in the left and right directions of the panel may be performed by itself, but color improvement in the vertical direction is satisfactory due to the shape of the lenticular lenses arranged vertically. Can not. In the case of applying the light diffusing agent of the present invention, color improvement in the vertical direction is possible with color improvement in the left and right directions.

The light diffusing agent in the present invention may be included in 0.1 to 10% by weight of the low refractive light diffusing layer.

The low refractive light diffusing layer may help to improve the adhesion of the adhesive layer to be further laminated as well as the light diffusion and color improvement effect, and can ultimately improve the reliability of the display panel. If there is no low refractive light diffusing layer, only the surface area of the entire surface of the high refractive resin layer having the optical pattern is formed except the occupied area of the optical pattern formed in the engraved surface is the target of adhesion, and thus the adhesive force may be lowered. It is because peeling with may occur.

The base resin used in the high refractive resin layer 110 and the low refractive light diffusing layer 120 may be an ultraviolet curable transparent resin as the transparent polymer resin.

As the ultraviolet curable transparent resin, those having an acrylate-based functional group, for example, a relatively small molecular weight polyester resin, polyether resin, acrylic resin, epoxy resin, urethane resin, alkyd resin, spiro acetal resin, polybutadiene resin And (meth) acrylate resins of polyfunctional compounds such as polythiol polyene resins and polyhydric alcohols.

Specific examples thereof include ethylene glycol diacrylate, neopentyl glycol di (meth) acrylate, 1,6-hexanediol (meth) acrylate, trimethylolpropane tri (meth) acrylate, dipentaerythritol hexa (meth) acrylate Polyester (meth) acryl obtained by esterifying polyol poly (meth) acrylate, di (meth) acrylate of bisphenol A- diglycidyl ether, polyhydric alcohol and polyhydric carboxylic acid, and its anhydride and acrylic acid Latex, polysiloxane polyacrylate, urethane (meth) acrylate, pentaerythritol tetra methacrylate, glycerin tri methacrylate, and the like, but are not limited thereto.

As another embodiment of the present invention, referring to FIG. 4, an adhesive layer 130 may be further stacked on the light incident surface of the low refractive light diffusing layer. In the color improving film of the present invention, incident light may proceed in the order of an adhesive layer, a light diffusion layer, a high refractive resin layer, and a substrate layer. The adhesive layer may be formed of a common adhesive.

Since the color improving film of the present invention has the above-described structural features, there is little change in white angle dependence (WAD) according to the viewing angle, and the whiteness according to the viewing angle can be uniformly expressed.

Manufacturing method of color improving film

Method for producing a color improving film according to an embodiment of the present invention comprises the steps of coating a high refractive index transparent resin on one surface of the substrate layer to form a negative optical pattern to produce a high refractive resin layer; Dispersing the light diffusing agent into the low refractive transparent resin to prepare a low refractive light diffusing layer; And bonding one surface of the low refractive light diffusing layer to a surface on which the optical pattern of the high refractive resin layer is formed.

As another embodiment of the present invention, the method may further include forming an adhesive layer by applying an adhesive to the other surface of the light diffusion layer.

Ultraviolet curable transparent resin can be used for the said transparent resin. The high refractive index transparent resin may have a refractive index of 1.50 to 1.60, and the low refractive index transparent resin may have a refractive index of 1.35 to 1.45.

The high refractive resin layer is formed by applying a high refractive transparent resin to one surface of the base layer and then forming a negative optical pattern by using a hard mold using an engraving roll on which an optical pattern is embossed or a soft mold method using a film on which an optical pattern is embossed. can do.

The low refractive light diffusing layer is sufficiently dispersed in the low refractive ultraviolet curable transparent resin, and then bonded to the surface on which the optical pattern of the high refractive resin layer is formed using a flat roll to form a light diffusing layer of the color improving film. Can be.

The low refractive light diffusing layer may be preferably 10 to 30 μm except for the thickness of the lens unit. If the thickness exceeds 30㎛, the light transmittance may be reduced due to the excessive amount of light scattering due to the excessive amount of the diffusing agent. If the thickness is less than 10㎛, the surface may be rough due to the size of the diffusing agent. It cannot be secured.

OLED display device

6 schematically illustrates an organic light emitting diode display device according to an embodiment of the present invention. Referring to FIG. 6, the organic light emitting diode display device includes a first electrode 210, a second electrode 220 facing the first electrode 210, and a first electrode 210 and a second electrode 220. An organic light emitting film 230 formed therebetween; And a color improving film 240 provided on the light exit surface of the second electrode 220.

The first electrode 210 is an anode, the second electrode 220 is a cathode, and the first electrode 210 and the second electrode 220 may include a transparent electrode or a reflective electrode. have.

The organic emission layer 230 includes a hole injection layer (HIL), a hole transport layer (HTL), an emission layer (EML), an electron transport layer (ETL), and an electron injection. The layer (Electron Injection Layer, EIL) may be sequentially stacked.

The organic light emitting diode display may have a resonance structure to implement an image with colors reflected from each pixel of the organic light emitting layer.

FIG. 7A is a conceptual diagram schematically illustrating a resonance structure of an organic light emitting diode display device. Referring back to FIG. 6, the structure surrounded by the first electrode and the second electrode may be defined as a cavity, and the light emitted from the emission layer (EML) may be the first electrode as shown in FIG. 7A. Reflection occurs repeatedly in the cavity between the second electrode and the second electrode, and the light emission intensity of a specific wavelength region may be amplified as shown in FIG. As shown in FIG. 7B, the strong resonance structure has a narrower light wavelength region, a larger front emission intensity, and a narrower emission direction than the weak resonance structure. That is, the color purity and the front luminance are increased, but the viewing angle is narrowed. Therefore, a color shift phenomenon may occur in which the display, which was seen in front of white, appears in blue as the viewing angle increases. This color change can be defined as White Angle Dependency (WAD), and the color improvement film described above was introduced to adjust the color change.

Hereinafter, the configuration and operation of the present invention through the preferred embodiment of the present invention will be described in more detail. However, this is presented as a preferred example of the present invention and in no sense can be construed as limiting the present invention.

Details that are not described herein will be omitted since those skilled in the art can sufficiently infer technically.

Example

Example 1

Each of the following layers were sequentially laminated to prepare a color improving film, and then the physical properties were evaluated, and are shown in Table 1 below, and the ΔU'V 'values according to the viewing angles are shown in the graph of FIG. 5.

Substrate layer: TAC film of Fujifilm Co., Ltd. was used, and the thickness was 60 micrometers.

High refractive resin layer having an optical pattern: An optical pattern was formed on one surface of a high refractive resin layer made of an ultraviolet curable transparent acrylic resin (RS1400, Aekyung Chemical Co., Ltd.) at an intaglio. The refractive index of the high refractive resin layer is 1.52, the thickness is 50 mu m, the optical pattern is composed of a plurality of lenticular concave lenses, the width of the lenticular concave lens is 10 mu m, the depth is 20 mu m, and the aspect ratio is 2.0. The space occupied by the concave lens is filled with air.

Low Refractive Light Diffusion Layer:

It is made of an ultraviolet curable transparent acrylic resin (SCA-3802, Shina T & C Co., Ltd., refractive index 1.39) containing a light diffusing agent, refractive index is 1.39, and thickness is 30 micrometers. The light diffusing agent (SL-200, Cheil Industries, Inc., 2 μm of an average particle diameter (D50)) was used at 3 wt% in the low refractive index light diffusing layer.

Example 2

Except that the content of the light diffusing agent is 5% by weight to prepare the same color improving film as in Example 1 and then to measure the physical properties are shown in Table 1 below.

Comparative Example 1

Except that the low refractive light diffusing layer does not contain a light diffusing agent was prepared in the same color improving film as in Example 1 and then measured by the physical properties shown in Table 1 below.

Property evaluation method

Light transmittance (%) and light scattering (%): The prepared film was cut into 5cm * 5cm size, and measured by NDH5000W (Nippon Denshoku, Inc.) according to the ASTM D1003 standard.

Color change rate (ΔU'V '): The film of Example and Comparative Example was cut into 20cm * 20cm size and attached to OLED TV panel by measuring instrument EZcontrast (Eldim). Spectra were measured at 1 ° intervals up to °. With the measured results, the color change rate ΔU'V 'value was calculated from the viewing angle of 0 °, and the ΔU'V' value according to the viewing angle was shown in the graph of FIG. 4. The film is not attached to the bare panel.

Adhesive force evaluation: After cutting the film of the Example and the comparative example to the size of 5 inch * 1 inch, the force required to peel off by pulling in a 180 ° direction using a measuring device 5944 (Instron Co., Ltd.).

Example 1 Example 2 Comparative Example 1 oyster
section
Rate High refractive resin layer 1.52 1.52 1.52 Low Refractive Light Diffusion Layer 1.39 1.39 1.39 Concave lens aspect ratio (D / H) 2.0 2.0 2.0 Light Diffusion Agent (wt%) 3 5 - Light transmittance (%) 86.45 88.06 92.65 Light Scattering (%) 45.78 54.84 36.99
△ U'V ' 0 ° 0 0 0 20 ° 0.004 0.004 0.007 40 ° 0.017 0.013 0.022 60 ° 0.023 0.017 0.028 Adhesive force (gf / in) 129.5 118.2 39.8

Referring to Table 1 and Figure 5, Examples 1 and 2 it can be seen that the light scattering property is further improved than Comparative Example 1 by the addition of a light diffusing agent. In addition, it can be seen that the value of ΔU'V 'according to the viewing angle is lowered, thereby improving color.

In addition, the adhesive force of Example 1-2 is remarkably superior to Comparative Example 1 to prevent the peeling phenomenon with the panel due to the improvement of the adhesive strength with the adhesive layer, thereby improving the reliability of the display panel.

Claims (19)

Base layer;
A resin layer on which an optical pattern is formed; And
A light diffusing layer comprising a light diffusing agent and having a lower refractive index than the resin layer; Are sequentially stacked,
The bottom surface of the resin layer facing the substrate layer is a flat surface,
An optical pattern is engraved on one surface of the resin layer facing the light diffusion layer.
The method of claim 1,
The resin layer is a color improving film comprising an ultraviolet curable transparent resin having a refractive index of 1.50 to 1.60.
The method of claim 1,
The light diffusing layer is a color improving film comprising an ultraviolet curable transparent resin having a refractive index of 1.35 to 1.45.
The method of claim 1,
The optical pattern includes a plurality of lenticular concave lenses, the lenticular concave lens has a width D of 1 to 1,000 µm, a depth H of 1 to 2,000 µm, and an aspect ratio H / D of 1. 3 to 3, the color improving film.
The method of claim 4, wherein
The optical pattern has a separation distance L between neighboring lenticular concave lenses,
The ratio L / D of the separation distance L and the width D of the lenticular concave lens is 3.0 or less.
In claim 1,
The resin layer and the diffusion layer is an ultraviolet curable resin having an acrylate functional group.
The method of claim 1,
The light diffusing agent is an organic light diffusing agent, an inorganic light diffusing agent, or a mixture thereof,
The organic light diffusing agent includes at least one selected from the group consisting of acrylic particles, siloxane particles, melamine particles, polycarbonate particles, and styrene particles,
The inorganic light diffusing agent includes at least one selected from the group consisting of calcium carbonate, barium sulfate, titanium dioxide, aluminum hydroxide, silica, glass, talc, mica, white carbon, magnesium oxide, and zinc oxide. Color improvement film.
The method of claim 7, wherein
The organic light diffusing agent is a color improving film, characterized in that the average particle diameter (D50) is 2㎛ to 20㎛
The method of claim 8,
The organic light diffusing agent includes polymer particles and uncoated particles coated with a black dye,
The polymer particles coated with the black dye are polymethyl methacrylate (PMMA) particles,
The uncoated particles are silicon-based particles, acrylic particles, or a color improving film, characterized in that a mixture thereof.
The method of claim 9,
The organic light diffusing agent is a color improving film, characterized in that it comprises the polymer particles and uncoated particles coated with the black dye in a weight ratio of 1: 4 to 4: 1.
The method of claim 1,
The light diffusing agent is a color improving film, characterized in that contained in 0.1 to 10% by weight of the light diffusion layer.
The method of claim 1,
The base layer has a thickness of 30 μm to 100 μm,
The maximum thickness of the resin layer is 5㎛ to 80㎛,
The thickness of the light diffusion layer is a color improving film, characterized in that 5㎛ 50㎛.
The method of claim 1,
Color improvement film, characterized in that the adhesive layer is further laminated on one surface of the light diffusion layer.
The method of claim 1,
The base layer is a color improving film comprising TAC (TriAcetate Cellulose), polyethylene terephthalate (PolyEthylene Terephthalate, PET), polycarbonate (PolyCarbonate, PC), or polyvinyl chloride (PVC).
An organic light emitting film formed between a first electrode, a second electrode facing the first electrode, and the first electrode and the second electrode; And the color improving film of any one of claims 1 to 14 provided on the light exit surface of the second electrode.
An organic light emitting diode display device having a resonance structure to implement an image in a color reflected from each pixel of the organic light emitting film.
The method of claim 15,
The organic emission layer may include a hole injection layer (HIL), a hole transport layer (HTL), an emission layer (EML), an electron transport layer (ETL), and an electron injection layer (Electron Injection). Layer, EIL) is an organic light emitting display device characterized in that the stacking sequentially.
Preparing a resin layer by coating a transparent resin (hereinafter, first transparent resin) on one surface of a base layer and forming an intaglio optical pattern;
Dispersing a light diffusing agent into a transparent resin having a lower refractive index than the first transparent resin (hereinafter, a second transparent resin) to prepare a light diffusing layer having a lower refractive index than the resin layer; And
Bonding one surface of the light diffusion layer to a surface on which the optical pattern of the resin layer is formed;
The bottom surface of the said resin layer facing the said base material layer is a manufacturing method of a color improving film.
The method of claim 17,
The method of manufacturing a color improving film, characterized in that it further comprises the step of forming an adhesive layer by applying an adhesive to the other surface of the light diffusion layer.
The method of claim 17,
The first transparent resin is an ultraviolet curable transparent resin having a refractive index of 1.50 to 1.60,
The second transparent resin is a UV curable transparent resin having a refractive index of 1.35 to 1.45 method of producing a color improving film.

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