KR20200030042A - Display device and fabrication method of the same - Google Patents

Abstract

A light emitting sheet includes a first film, a first light emitting resin pattern layer, a second film, and a second light emitting resin pattern layer. The first light emitting resin pattern layer is formed on the first film and includes a plurality of first protrusions and a plurality of first grooves formed between the first protrusions. A second film is formed on the first light emitting resin pattern layer. The second light emitting resin pattern layer is formed between the first light emitting resin pattern layer and the second film. The second light emitting resin pattern layer includes a plurality of second protrusions and a plurality of second grooves formed between the second protrusions and the first resin layer and the second resin layer are made of the same material. The second protrusions contact the first grooves, respectively, and the first protrusions contact the second grooves, respectively.

Description

DISPLAY DEVICE AND FABRICATION METHOD OF THE SAME

The present invention relates to a display device and a manufacturing method thereof, and more particularly, to a display device including a light emitting sheet and a manufacturing method thereof.

Display devices include liquid crystal displays, electrowetting displays, and electrophoretic displays. The display device includes a light-receiving type display panel and a separate backlight unit that provides light to the display panel. In general, the backlight unit provides white light to the display panel, and the white light is converted into light having a specific color and is recognized by the user's eyes.

In recent years, in order to improve the visibility, color reproducibility, and the like of a display device, a light emitting sheet containing light emitting particles has been used. In general, when a luminescent sheet is formed using a luminescent resin solution having a high viscosity, luminescent particles may be aggregated in a process such as curing, and luminescent particles may not be evenly dispersed in the luminescent sheet. Accordingly, a display device including a light-emitting sheet formed using a high-viscosity light-emitting resin liquid has poor color reproducibility.

When using a luminescent resin liquid having a low viscosity of 1000 cP or less, when using a luminescent sheet, the luminescent particles are not aggregated and can be evenly dispersed in the luminescent sheet, but the luminous resin liquid of low viscosity is low in viscosity and controlled during processing Is not easy. Further, when a light-emitting sheet is formed using a low-viscosity light-emitting resin solution, it is difficult to manufacture a light-emitting sheet having a uniform thickness while having a sufficient thickness to enhance color reproducibility.

An object of the present invention is to provide a display device including a light emitting sheet having a uniform thickness while having a thickness capable of having excellent color reproducibility using a resin having a low viscosity.

Another object of the present invention is to provide a method of manufacturing a display device including a light emitting sheet having a uniform thickness while having a thickness capable of having excellent color reproducibility using a resin having a low viscosity.

A display device according to an exemplary embodiment of the present invention includes a display panel, a backlight unit, and a light emitting sheet. The display panel displays an image. The backlight unit is formed under the display panel and provides light to the display panel. The light emitting sheet is formed between the display panel and the backlight unit. The light emitting sheet includes a first film, a first light emitting resin pattern layer, a second film, and a second light emitting resin pattern layer. The first light emitting resin pattern layer is formed on the first film, and includes a plurality of first protrusions and a plurality of first grooves formed between the first protrusions. The second film is formed on the first light emitting resin pattern layer. The second light emitting resin pattern layer is formed between the first light emitting resin pattern layer and the second film.

The second light emitting resin pattern layer includes a plurality of second protrusions and a plurality of second grooves formed between the second protrusions. The second protrusions respectively contact the first grooves, and the first protrusions respectively contact the second grooves.

Each of the first protrusions may have a shape of at least one of a part of a triangle, a rectangle, a circle, and a part of an ellipse.

The thickness of the first light emitting resin pattern layer may be 20 to 40㎛.

The thickness of the second light emitting resin pattern layer may be greater than or equal to the thickness of the first light emitting resin pattern layer.

The first luminescent resin pattern layer includes first luminescent particles, the second luminescent resin pattern layer includes second luminescent particles, and each of the first luminescent particles and the second luminescent particles is a phosphor or a quantum dot You can.

The quantum dots are Group II-VI compound, Group II-V compound, Group III-VI compound, Group III-V compound, Group IV-VI compound, Group I-III-VI compound, Group II-IV-VI compound and II -IV-V may include at least one of the compounds.

The quantum dot may include a core and a shell that overcoats the core. The core is CdS, CdSe, CdTe, ZnS, ZnSe, ZnTe, GaN, GaP, GaAs, GaSb, AlN, AlP, AlAs, AlSb, InP, InAs, InSb, SiC, Ca, Se, In, P, Fe, Pt , Ni, Co, Al, Ag, Au, Cu, FePt, Fe ₂ O ₃ , Fe ₃ O ₄ , Si, and Ge, and the shell is ZnS, ZnSe, ZnTe, CdS, CdSe, CdTe, HgS , HgSe, HgTe, AlN, AlP, AlAs, AlSb, GaN, GaP, GaAs, GaSb, GaSe, InN, InP, InAs, InSb, TlN, TlP, TlAs, TlSb, PbS, PbSe and PbTe May be

At least one of the first light emitting resin pattern layer and the second light emitting resin pattern layer may be a plurality.

A method of manufacturing a display device according to an embodiment of the present invention includes forming a light emitting sheet, disposing the light emitting sheet on a backlight unit, and disposing a display panel on the light emitting sheet. The forming of the light emitting sheet may include forming a first light emitting resin pattern layer including a plurality of first protrusions on the first film and a plurality of first grooves formed between the first protrusions and the first And forming a second light emitting resin pattern layer including a plurality of second protrusions contacting the first grooves and a plurality of second grooves formed between the second protrusions and contacting the first protrusions. May be

The forming of the first light emitting resin pattern layer includes providing a first light emitting resin solution on the first film, forming a first light emitting resin pattern on the first film, and the first light emitting resin pattern. It may be to include the step of curing the to form the first light emitting resin pattern layer.

The forming of the first light-emitting resin pattern may include disposing a patterning mold on the first film and forming the first light-emitting resin pattern by rolling the first film and the patterning mold. have.

The forming of the second light emitting resin pattern layer may include disposing a second film on the first film on which the first light emitting resin pattern layer is formed, and forming a second film between the first light emitting resin pattern layer and the second film. 2 providing a luminescent resin solution, forming a second luminescent resin pattern between the first luminescent resin pattern layer and the second film, and curing the second luminescent resin pattern to obtain the second luminescent resin pattern layer It may be to include a step of forming.

The forming of the second light emitting resin pattern may include forming the second light emitting resin pattern by rolling the first film and the second film.

Each of the first luminescent resin solution and the second luminescent resin solution may have a viscosity of 1 to 1000 cP.

The thickness of the first light emitting resin pattern layer may be 20 to 40㎛.

The step of forming the second light emitting resin pattern layer may be to form the second light emitting resin pattern layer so that the thickness of the second light emitting resin pattern layer is greater than or equal to the thickness of the first light emitting resin pattern layer. .

Each of the first protrusions may have a shape of at least one of a part of a triangle, a rectangle, a circle, and a part of an ellipse.

The first luminescent resin pattern layer includes first luminescent particles, the second luminescent resin pattern layer includes second luminescent particles, and each of the first luminescent particles and the second luminescent particles is a phosphor or a quantum dot You can.

Each of the forming of the first light emitting resin pattern layer and the forming of the second light emitting resin pattern layer may be performed multiple times.

According to the display device according to an exemplary embodiment of the present invention, a display device including a light emitting sheet having a uniform thickness while having a thickness capable of having excellent color reproducibility using a resin having a low viscosity can be provided. .

According to a method of manufacturing a display device according to an exemplary embodiment of the present invention, a display device including a light emitting sheet having a uniform thickness while having a thickness capable of having excellent color reproducibility is manufactured using a resin having a low viscosity. You can.

1 is an exploded perspective view schematically showing a display device according to an exemplary embodiment of the present invention.
2 is a cross-sectional view schematically illustrating a display panel included in a display device according to an exemplary embodiment.
3A to 3C are cross-sectional views schematically illustrating a light emitting sheet included in a display device according to an exemplary embodiment of the present invention.
4 is a cross-sectional view schematically illustrating quantum dots included in a display device according to an exemplary embodiment of the present invention.
5 is a cross-sectional view schematically illustrating a light emitting sheet included in a display device according to an exemplary embodiment of the present invention.
6 is a flowchart schematically illustrating a method of manufacturing a display device according to an exemplary embodiment of the present invention.
7 is a flowchart schematically illustrating a method of manufacturing a light emitting sheet included in a method of manufacturing a display device according to an exemplary embodiment of the present invention.
8A to 8D are cross-sectional views sequentially illustrating a method of manufacturing a light emitting sheet included in a method of manufacturing a display device according to an embodiment of the present invention.
9 is a photograph taken in cross section of the light emitting sheet prepared in Example 1 of the present invention.

The above objects, other objects, features and advantages of the present invention will be readily understood through the following preferred embodiments related to the accompanying drawings. However, the present invention is not limited to the embodiments described herein and may be embodied in other forms. Rather, the embodiments introduced herein are provided to ensure that the disclosed contents are thorough and complete and that the spirit of the present invention is sufficiently conveyed to those skilled in the art.

In describing each drawing, similar reference numerals are used for similar components. In the accompanying drawings, the dimensions of the structures are shown to be enlarged than the actual for clarity of the present invention. Terms such as first and second may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from other components. For example, the first component may be referred to as a second component without departing from the scope of the present invention, and similarly, the second component may be referred to as a first component. Singular expressions include plural expressions unless the context clearly indicates otherwise.

In this application, terms such as “include” or “have” are intended to indicate that a feature, number, step, operation, component, part, or combination thereof described on the specification exists, and that one or more other features are present. It should be understood that the existence or addition possibilities of fields or numbers, steps, actions, components, parts or combinations thereof are not excluded in advance. In addition, when a part such as a layer, film, region, plate, etc. is said to be "above" another part, this includes not only the case "directly above" the other part but also another part in the middle. Conversely, when a portion of a layer, film, region, plate, or the like is said to be “under” another portion, this includes not only the case “underneath” another portion, but also another portion in the middle.

1 is an exploded perspective view schematically showing a display device according to an exemplary embodiment of the present invention.

Referring to FIG. 1, the display device 10 includes a display panel 100, a backlight unit 200, and a light emitting sheet 220. The display device 10 may further include a bottom chassis 260, a mold frame 300 and a top chassis 400.

The long axis direction of the display device 10 is defined as a first direction (for example, the DR1 direction of FIG. 1), and the short axis direction of the display device 10 is orthogonal to the first direction (for example, the DR1 direction of FIG. 1). Is defined in the second direction (for example, the DR2 direction in FIG. 1). The bottom chassis 260, the backlight unit 200, the mold frame 300, the display panel 100, and the top chassis 400 have a first direction (for example, the DR1 direction in FIG. 1) and a second direction (for example, For example, they are sequentially stacked in a third direction (for example, DR3 direction in FIG. 1) perpendicular to each of the DR2 direction in FIG. 1).

The display panel 100 displays an image. The display panel 100 is a light-receiving display panel, a liquid crystal display panel, a plasma display panel, an electrophoretic display panel, a MEMS display panel (microelectromechanical system display panel) And an electrowetting display panel. It will be described, for example, that the display panel according to an embodiment of the present invention is a liquid crystal display panel.

The liquid crystal display panel includes any one of VA (Vertical Alignment) mode, PVA (Patterned Vertical Alignment) mode, IPS (in-plane switching) mode or FFS (fringe-field switching) mode, and PLS (Plane to Line Switching) mode. It can be a panel of, and is not limited to a panel of a particular mode.

The display panel 100 may include a first substrate 102 and a second substrate 104 formed on the first substrate 102. The display panel 100 will be described later in detail.

The display device 10 may further include a printed circuit board 110 and a tape carrier package 109.

The printed circuit board 110 is electrically connected to the display panel 100. The printed circuit board 110 may provide a driving signal to the display panel 100. The printed circuit board 110 may include a driver (not shown). In one embodiment of the present invention, the driver (not shown) is described as being included in the printed circuit board 110, but the driver (not shown) may be included in the tape carrier package 109 or the first substrate 102.

The driving unit (not shown) generates a driving signal for driving the display panel 100 in response to an external signal. The external signal is a signal provided from the printed circuit board 110, and the external signal may include, for example, an image signal, various control signals and driving voltages. The driving signal may include a gate signal applied to the gate line and a data signal applied to the data line.

The driver (not shown) converts the image signal into a data signal and transmits the data driver to the display panel 100 (not shown) and a gate driver converts the image signal into a gate signal and transmits the image signal to the display panel 100 (not shown) ). Without being limited thereto, each of the data driver (not shown) and the gate driver (not shown) may be composed of chips and may be included in the tape carrier package 109, and the chip on glass may be applied to the first substrate 102. : COG).

The tape carrier package 109 electrically connects the printed circuit board 110 and the display panel 100. The tape carrier package 109 may be a plurality. The tape carrier package 109 may be bent to surround the side surface of the bottom chassis 260.

The backlight unit 200 may include a light source unit 250 and a light guide plate 230. The backlight unit 200 is formed under the display panel 100 and provides light to the display panel 100.

The light source unit 250 provides light to the light guide plate 230. The light source unit 250 may include at least one light source 251 and a circuit board 252 that mounts the light source 251 on one surface and applies power to the light source 251. The light source 251 may be light emitting diodes (LED). The circuit board 252 may have a plate shape. A plurality of light sources 251 may be provided, and may be disposed on the circuit board 252 spaced apart from each other in a first direction (for example, the DR1 direction of FIG. 1).

The light guide plate 230 guides and emits light provided from the light source unit 250. The light guide plate 230 may be provided in a plate shape of a rectangular parallelepiped shape, and may be formed under the display panel 100. The light guide plate 230 may be made of a transparent polymer resin such as polycarbonate or polymethyl methacrylate. The light guide plate 230 guides the light provided from the light source unit 250 in the direction of the display panel 100. Light incident into the light guide plate 230 is emitted to the display panel 100 through the upper surface of the light guide plate 230.

In the display device 10 according to an exemplary embodiment of the present invention, it has been described, for example, that the light source unit 250 is provided in correspondence with only one of the side surfaces of the light guide plate 230, but is not limited thereto. A plurality of light source units 250 may be disposed along different sides of the. In an exemplary embodiment of the present invention, the display device 10 includes an edge-type light source unit 250, for example, but is not limited thereto, and the display is different from the exemplary embodiment of the present invention. The device 10 may also include a direct light source unit 250.

The backlight unit 200 may further include a reflective sheet 240. The reflective sheet 240 may be formed under the light guide plate 230. The reflective sheet 240 reflects light leaking without proceeding in the direction of the display panel 100 to change the path of light so that the light proceeds in the direction of the display panel 100. Accordingly, the reflective sheet 240 increases the amount of light provided to the display panel 100 side.

As described above, the display device 10 according to an exemplary embodiment of the present invention includes a light emitting sheet 220. The light emitting sheet 220 is formed between the display panel 100 and the backlight unit 200. The light emitting sheet 220 will be described later in detail.

An optical member 210 may be provided between the backlight unit 200 and the light emitting sheet 220.

The optical member 210 may be formed between the display panel 100 and the light guide plate 230. The optical member 210 improves the luminance and viewing angle of the light exiting the light exit plate 230. The optical member 210 may include a first optical sheet 208, a second optical sheet 207, and a third optical sheet 206 sequentially stacked.

The first optical sheet 208 may be a diffusion sheet that diffuses light emitted from the light guide plate 230. The second optical sheet 207 may be a prism sheet that collects light diffused from the diffusion sheet in a direction perpendicular to the plane of the upper display panel 100. The third optical sheet 206 may be a protective sheet that protects the prism sheet from external impact. The optical member 210 may use a plurality of at least any one of the first optical sheet 208, the second optical sheet 207, and the third optical sheet 206, and may omit one or more sheets as necessary. It might be.

The bottom chassis 260 may be formed under the backlight unit 200. The bottom chassis 260 may receive components of the backlight unit 200. The bottom chassis 260 may be combined to face the top chassis 400.

The mold frame 300 is formed between the display panel 100 and the backlight unit 200. The mold frame 300 is provided along the edge of the display panel 100 to support the display panel 100 under the display panel 100. The mold frame 300 may have a substantially rectangular ring shape.

The top chassis 400 is provided on the display panel 100. The top chassis 400 may be combined to face the bottom chassis 260. The top chassis 400 may cover the edge of the display panel 100.

2 is a cross-sectional view schematically illustrating a display panel 100 included in a display device 10 according to an exemplary embodiment of the present invention.

Referring to FIG. 2, the display panel 100 includes a first substrate 102, a second substrate 104, and a liquid crystal layer (LCL).

The first substrate 102 includes a first base substrate SUB1, a thin film transistor TFT, and a pixel electrode PE.

The first base substrate SUB1 is a transparent insulating substrate, and may be made of silicon, glass, or plastic.

A gate line (not shown) and a data line (not shown) may be formed on the first base substrate SUB1. A plurality of gate lines (not shown) may be formed, and may be formed to extend in a first direction (for example, the DR1 direction of FIG. 1) on the first base substrate SUB1. A plurality of data lines (not shown) may be provided, and a second direction (for example, the DR1 direction of FIG. 1) intersecting the gate line (not shown) and the gate insulating layer GI therebetween (example) For example, it may be formed extending in the direction of DR2 in FIG. 1).

The thin film transistor TFT includes a gate electrode GE, a semiconductor pattern SM, a source electrode SE, and a drain electrode DE.

The gate electrode GE is formed on the first base substrate SUB1. The gate electrode GE may be formed by branching from a gate line (not shown).

The gate electrode GE may be made of metal. The gate electrode GE may be made of nickel, chromium, molybdenum, aluminum, titanium, copper, tungsten, and alloys containing them. The gate electrode GE may be formed of a single layer or multiple layers using metal. For example, the gate electrode GE may be a triple layer in which molybdenum, aluminum and molybdenum are sequentially stacked, or a double layer in which titanium and copper are sequentially stacked. Or it may be a single film of an alloy of titanium and copper.

The gate insulating layer GI is formed on the gate electrode GE. The gate insulating layer GI covers the gate electrode GE. The gate insulating layer GI may be made of an organic insulating material or an inorganic insulating material.

The semiconductor pattern SM is provided on the gate insulating layer GI. The semiconductor pattern SM faces the gate electrode GE with the gate insulating layer GI interposed therebetween. Some regions of the semiconductor pattern SM overlap the gate electrode GE.

The source electrode SE may be formed by branching from a data line (not shown). At least a portion of the source electrode SE may be formed on the semiconductor pattern SM. At least a portion of the source electrode SE may overlap the semiconductor pattern SM and the gate electrode GE, respectively.

The drain electrode DE is spaced apart from the source electrode SE with the semiconductor pattern SM interposed therebetween. At least a portion of the drain electrode DE may be formed on the semiconductor pattern SM. At least a portion of the drain electrode DE may overlap each of the semiconductor pattern SM and the gate electrode GE.

The source electrode SE and the drain electrode DE may be made of nickel, chromium, molybdenum, aluminum, titanium, copper, tungsten, and alloys containing them, respectively. The source electrode SE and the drain electrode DE may be formed of a single layer or multiple layers using metal, respectively. For example, the source electrode SE and the drain electrode DE may be a double layer in which titanium and copper are sequentially stacked, respectively. Or it may be a single film made of an alloy of titanium and copper.

The first substrate 102 may further include a first insulating layer INL1 on the semiconductor pattern SM, the source electrode SE, and the drain electrode DE. The first insulating layer INL1 may be made of an insulating material such as silicon oxide or silicon nitride.

The first insulating layer INL1 includes a contact hole CH. The contact hole CH exposes at least a portion of the drain electrode DE.

The pixel electrode PE is formed on the first insulating layer INL1. The pixel electrode PE may be connected to the drain electrode DE through the contact hole CH with the first insulating layer INL1 therebetween.

The pixel electrode PE may be formed of a transparent conductive material. The pixel electrode PE is formed of a transparent conductive oxide. The transparent conductive oxide may be, for example, indium tin oxide (ITO), indium zinc oxide (IZO), indium tin zinc oxide (ITZO), or the like. The pixel electrode PE can be formed in various ways, for example, by using a photolithography process.

The second substrate 104 may include a second base substrate SUB2, a color filter CF, a black matrix BM, and a common electrode CE. However, the present invention is not limited thereto, and each of the color filter CF, the black matrix BM, and the common electrode CE may be included in the first substrate 102.

The second base substrate SUB2 is a transparent insulating substrate, and may be made of silicon, glass, or plastic.

The color filter CF is formed on the second base substrate SUB2 and provides color to the light provided by the backlight unit 200. The color filter CF may include a red color filter, a green color filter, and a blue color filter. The color filter CF may further include a white color filter.

The color filter CF may be formed by forming a color layer representing red, green, blue, or other colors on the second base substrate SUB2, and patterning the color layer using photolithography. The method for forming the color filter CF is not limited to this, and may be formed by an inkjet method or the like.

The black matrix BM is formed on the second base substrate SUB2 and overlaps the light blocking region of the first substrate 102. The light blocking area may be defined as a region in which a data line (not shown), a gate line (not shown), and a thin film transistor (TFT) are formed. Since the pixel electrode PE is not usually formed in the light blocking region, light leakage may occur because the liquid crystal molecules are not aligned. The black matrix BM is formed in the light blocking region to block light leakage. The black matrix (BM) may be formed by forming a light-blocking layer that absorbs light and patterning the light-blocking layer using photolithography, or alternatively, other methods, for example, an inkjet method.

The planarization layer OC may be formed on the color filter CF and the black matrix BM. The planarization layer OC may planarize the top surface of the second base substrate SUB2 on which the black matrix BM is disposed. The planarization layer OC may be formed of, for example, an organic insulating film or an inorganic insulating film.

The common electrode CE may be formed on the planarization layer OC. The common electrode CE can receive a common voltage. The common electrode CE may face the pixel electrode PE, and the liquid crystal layer LCL is driven by forming an electric field together with the pixel electrode PE.

The common electrode CE may be formed of a transparent conductive material. The common electrode CE may be formed of a conductive metal oxide such as indium tin oxide (ITO), indium zinc oxide (IZO), or indium tin zinc oxide (ITZO). The common electrode CE can be formed by various methods, for example, by using a photolithography process.

The liquid crystal layer LCL includes a plurality of liquid crystal molecules having dielectric anisotropy. The liquid crystal molecules of the liquid crystal layer LCL rotate in a specific direction between the first substrate 102 and the second substrate 104 when an electric field is applied between the pixel electrode PE and the common electrode CE, and accordingly The transmittance of light incident on the liquid crystal layer (LCL) is adjusted.

3A to 3C are cross-sectional views schematically illustrating a light emitting sheet 220 included in the display device 10 according to an exemplary embodiment of the present invention.

3A to 3C, the light emitting sheet 220 includes a first film 221, a first light emitting resin pattern layer 223, and a second film 222 formed on the first light emitting resin pattern layer 223. ) And the second light emitting resin pattern layer 226 formed between the first light emitting resin pattern layer 223 and the second film 222.

Each of the first film 221 and the second film 222 may be a barrier film. Each of the first film 221 and the second film 222 is not particularly limited as long as it is normally used, but, for example, polycarbonate (PC), polyethylene terephthalate (PET), polyethylene (PE), polypropylene (PP) ), Polysulfone (PSF), polymethyl methacrylate (PMMA), triacetyl cellulose (TAC), cycloolefin polymer (COP), and cycloolefin copolymer (COC).

The first light emitting resin pattern layer 223 is formed on the first film 221, and the plurality of first protrusions 224 and the plurality of first grooves 225 formed between the first protrusions 224 The second light emitting resin pattern layer 226 formed on one surface of the second film 222 includes a plurality of second protrusions 227 and a plurality of second grooves formed between the second protrusions 227 (228). The second protrusions 227 each contact the first grooves 225, and the first protrusions 224 each contact the second grooves 228.

The thickness h1 of the first light emitting resin pattern layer 223 may be 20 to 40 μm. The thickness h1 of the first light emitting resin pattern layer 223 means, for example, a vertical thickness of any one of the first protrusions 224 based on the lower surface of the first light emitting resin pattern layer 223. It may be. When the thickness h1 of the first light emitting resin pattern layer 223 is less than 20 μm, the thickness is small, and the number of first light emitting particles 220_E1 included in the first light emitting resin pattern layer 223 is insufficient, and thus color reproducibility is obtained. When falling, and the thickness h1 of the first light emitting resin pattern layer 223 is greater than 40 μm, the thickness is large, and the first light emitting resin solution (223_L in FIG. 8A) forming the first light emitting resin pattern layer 223 in the process ) Is difficult to control.

The thickness (h2) of the second light-emitting resin pattern layer 226 is the thickness h2 of the second light-emitting resin pattern layer 226, for example, based on the bottom surface of the second light-emitting resin pattern layer 226 It may mean the vertical thickness of any one of the projections 227. It may be greater than or equal to the thickness h1 of the first light emitting resin pattern layer 223. If the thickness h2 of the second light emitting resin pattern layer 226 is smaller than the thickness h1 of the first light emitting resin pattern layer 223, an empty space between the first film 221 and the second film 222 This may occur, and accordingly, when a user views an image displayed on the display device 10, visibility may deteriorate. Although not illustrated, a thickness relaxation layer may be included between the first light emitting resin pattern layer 223 and the second light emitting resin pattern layer 226. The thickness relaxation layer may be adjusted so that the entire thickness of the first light emitting resin pattern layer 223 and the second light emitting resin pattern layer 226 is constant.

Each of the first protrusions 224 may have various shapes, and may have, for example, a shape of at least one of a portion of a triangle, a square, a circle, and a portion of an ellipse.

3A, each of the first protrusions 224 may have a triangular shape. The first grooves 225 may be formed between the first protrusions 224, and may each have a triangular shape. The second protrusions 227 may have the same shape as the first grooves 225 and may be formed to come into contact with the first grooves 225. In FIG. 3A, for example, the first protrusions 224 have a shape having the same size, but are not limited thereto, and the first protrusions 224 may have shapes having different sizes from each other.

Referring to FIG. 3B, each of the first protrusions 224 may have a shape of a part of a circle. The first protrusions 224 may have a lens shape. The first protrusions 224 may have an approximately semicircular shape. The first grooves 225 may be formed between the first protrusions 224, and each may have a shape in which two fan shapes are excluded from the shape of a square. The second protrusions 227 may have the same shape as the first grooves 225 and may be formed to come into contact with the first grooves 225. In FIG. 3B, for example, the first protrusions 224 have a shape having the same size, but are not limited thereto, and the first protrusions 224 may have shapes having different sizes from each other.

Referring to FIG. 3C, each of the first protrusions 224 may have a shape of a part of an ellipse. The first protrusions 224 may have a lenticular shape. The first protrusions 224 may be, for example, smaller in size from the center of the light emitting sheet 220 toward one side of the light emitting sheet 220. The first grooves 225 are formed between the first protrusions 224, and each may have a shape in which two half elliptical shapes having different sizes from each other are approximately excluded. The second protrusions 227 may have the same shape as the first grooves 225 and may be formed to come into contact with the first grooves 225.

The first light emitting resin pattern layer 223 includes a first resin layer and first light emitting particles 220_E1. The second light emitting resin pattern layer 226 includes a second resin layer and second light emitting particles 220_E2. Each of the first resin layer and the second resin layer is generally used and is not particularly limited, but may be, for example, a urethane resin, an acrylic resin, or a silicone resin.

The first light emitting particles 220_E1 are included in the first resin layer. The second light emitting particles 220_E2 are included in the second resin layer. Each of the first light emitting particles 220_E1 and the second light emitting particles 220_E2 may be a phosphor or a quantum dot (220_Q in FIG. 4). The first light emitting particles 220_E1 and the second light emitting particles 220_E2 have the same size and a light emitting sheet may be formed with a uniform thickness, but are not limited thereto. The first light emitting particles 220_E1 and the second light emitting particles 220_E2 have different sizes from each other, and a light emitting sheet may be formed with a uniform thickness. In this case, it is possible to emit light of various wavelengths, thereby improving the image quality of the display device.

The phosphor may receive light from the light guide plate (230 in FIG. 1) and emit white light. However, the present invention is not limited thereto, and the phosphor may receive light from the light guide plate (230 of FIG. 1) and emit at least one of blue light, green light, and red light.

4 is a cross-sectional view schematically illustrating a quantum dot 220_Q included in the display device 10 according to an exemplary embodiment.

Referring to FIG. 4, the quantum dot 220_Q may receive light from the light guide plate (230 of FIG. 1) and emit white light. However, the present invention is not limited thereto, and the quantum dot 220_Q may receive light from the light guide plate (230 of FIG. 1) and emit at least one of blue light, green light, and red light. The light emitted from the quantum dot 220_Q has a half-value width that is narrower than the half-value width of light through a conventional color filter or phosphor, and thus has excellent color reproducibility.

The quantum dot 220_Q is a material having a crystal structure of a few nanometers, and is composed of hundreds to thousands of atoms. Since the size of the quantum dot 220_Q is very small, a quantum confinement effect appears. The quantum confinement effect refers to a phenomenon in which an energy band gap of an object increases when the object becomes smaller than a nano size. Accordingly, when light having a wavelength higher than the band gap is incident on the quantum dot 220_Q, the quantum dot 220_Q absorbs the light and becomes excited, and emits light of a specific wavelength and falls to the ground state. The light of the emitted wavelength has a value corresponding to the band gap. The quantum dot 220_Q may control light emission characteristics due to a quantum confinement effect by adjusting its size and composition.

The quantum dot 220_Q is not particularly limited as long as it is commonly used, for example, a II-VI compound, a II-V compound, a III-VI compound, a III-V compound, a IV-VI compound, Ⅰ It may include at least one of a -III-VI compound, a II-IV-VI compound, and a II-IV-V compound.

The quantum dot 220_Q may include a core 220_C and a shell 220_S overcoating the core 220_C. The core 220_C is not limited thereto, for example, CdS, CdSe, CdTe, ZnS, ZnSe, ZnTe, GaN, GaP, GaAs, GaSb, AlN, AlP, AlAs, AlSb, InP, InAs, InSb, SiC , Ca, Se, In, P, Fe, Pt, Ni, Co, Al, Ag, Au, Cu, FePt, Fe ₂ O ₃ , Fe ₃ O ₄ , Si, and Ge, and at least one of the shells 220_S Is not limited thereto, for example, ZnS, ZnSe, ZnTe, CdS, CdSe, CdTe, HgS, HgSe, HgTe, AlN, AlP, AlAs, AlSb, GaN, GaP, GaAs, GaSb, GaSe, InN, InP , InAs, InSb, TlN, TlP, TlAs, TlSb, PbS, PbSe and PbTe.

5 is a cross-sectional view schematically illustrating a light emitting sheet 220 included in the display device 10 according to an exemplary embodiment of the present invention.

Referring to FIG. 5, at least one of the first light emitting resin pattern layer 223 and the second light emitting resin pattern layer 226 may be a plurality. The first light emitting resin pattern layer 223 and the second light emitting resin pattern layer 226 may be alternately formed. In FIG. 5, the first light emitting resin pattern layer 223 and the second light emitting resin pattern layer 226 are respectively illustrated as three, but are not limited thereto, and the first light emitting resin pattern layer 223 and the first The two light emitting resin pattern layers 226 may be two, respectively, and the first light emitting resin pattern layer 223 and the second light emitting resin pattern layers 226 may be four or more, respectively.

In general, when using a luminescent resin liquid having a low viscosity of 1000 cP or less, when using a luminescent sheet, the luminescent particles are not aggregated and can be evenly dispersed in the luminescent sheet, but the low-viscosity luminescent resin liquid has a low viscosity It is not easy to control the thickness in the process. Further, when a light-emitting sheet is formed using a low-viscosity light-emitting resin solution, it is difficult to manufacture a light-emitting sheet having a uniform thickness while having a sufficient thickness to enhance color reproducibility.

1 to 5, the display device 10 according to an exemplary embodiment of the present invention includes a first luminescent resin pattern layer 223 and a second luminescent light each formed using a luminescent resin liquid having a low viscosity. Including the resin pattern layer 226, while having a sufficient thickness to increase the color reproducibility, it is possible to manufacture a light emitting sheet 220 having a uniform thickness. Accordingly, the display device 10 according to an exemplary embodiment of the present invention may have excellent color reproducibility.

Hereinafter, a method of manufacturing the display device 10 according to an exemplary embodiment will be described. Hereinafter, the differences from the display device 10 according to an embodiment of the present invention described above will be mainly described in detail, and the unexplained part follows the display device 10 according to an embodiment of the present invention described above.

6 is a flowchart schematically illustrating a method of manufacturing a display device 10 according to an exemplary embodiment of the present invention.

1 and 6, the manufacturing method of the display device 10 according to an exemplary embodiment of the present invention includes forming a light emitting sheet 220 (S100), and a light emitting sheet 220 on the backlight unit 200. ) (S200) and the displaying panel 100 on the light emitting sheet 220 (S300).

7 is a flowchart schematically illustrating a method of manufacturing a light emitting sheet 220 included in a method of manufacturing a display device 10 according to an embodiment of the present invention.

1, 3A, 6, and 7, the step of forming the light emitting sheet 220 (S100) includes a plurality of first protrusions 224 and first protrusions on the first film 221 Forming a first light emitting resin pattern layer 223 including a plurality of first grooves 225 formed between (224) (S110) and a plurality of second protrusions contacting the first grooves 225 The second light emitting resin pattern layer 226 is formed between the 227 and the second protrusions 227 and includes a plurality of second grooves 228 contacting the first first protrusions 224. It may be to include the step (S120). In the manufacturing method of the display device 10 according to an exemplary embodiment of the present invention, the light emitting sheet 220 having the cross section of FIG. 3A is described as an example, but is not limited thereto, and the light emitting sheet having the cross section of FIG. 3B ( 220, the display device 10 including the light emitting sheet 220 having various shapes, such as the light emitting sheet 220, may be manufactured.

The forming of the first light emitting resin pattern layer 223 (S110) includes providing a first light emitting resin solution (223_L in FIG. 8A) on the first film 221, and forming the first light emitting resin pattern layer 223 on the first film 221. 1 may include forming a light emitting resin pattern and curing the first light emitting resin pattern to form a first light emitting resin pattern layer 223.

The step of forming the first light emitting resin pattern (S110) includes disposing a patterning mold (510 in FIG. 8A) on the first film 221 and a first film 221 and a patterning mold (510 in FIG. 8A). It may be to include a step of forming a first light emitting resin pattern by rolling.

8A to 8D are cross-sectional views sequentially illustrating a method of manufacturing a light emitting sheet 220 included in a method of manufacturing a display device 10 according to an embodiment of the present invention.

1, 4, 7 and 8A, a first light emitting resin solution 223_L is provided on the first film 221. The first light emitting resin solution 223_L includes the first resin solution 223_R and the first light emitting particles 220_E1. The first resin solution 223_R may include urethane resin, acrylic resin, or silicone resin. The first light emitting particles 220_E1 may be phosphors or quantum dots 220_Q.

The quantum dot 220_Q is not particularly limited as long as it is commonly used, for example, a II-VI compound, a II-V compound, a III-VI compound, a III-V compound, a IV-VI compound, Ⅰ It may include at least one of a -III-VI compound, a II-IV-VI compound, and a II-IV-V compound.

The quantum dot 220_Q may include a core 220_C and a shell 220_S overcoating the core 220_C. The core 220_C is not limited thereto, for example, CdS, CdSe, CdTe, ZnS, ZnSe, ZnTe, GaN, GaP, GaAs, GaSb, AlN, AlP, AlAs, AlSb, InP, InAs, InSb, SiC , Ca, Se, In, P, Fe, Pt, Ni, Co, Al, Ag, Au, Cu, FePt, Fe ₂ O ₃ , Fe ₃ O ₄ , Si, and Ge, and at least one of the shells 220_S Is not limited thereto, for example, ZnS, ZnSe, ZnTe, CdS, CdSe, CdTe, HgS, HgSe, HgTe, AlN, AlP, AlAs, AlSb, GaN, GaP, GaAs, GaSb, GaSe, InN, InP , InAs, InSb, TlN, TlP, TlAs, TlSb, PbS, PbSe and PbTe.

The first light emitting resin solution 223_L may have a viscosity of 1 to 1000 cP. When the viscosity is less than 1 cP, it is difficult to control the first luminescent resin solution 223_L in the process, and when the viscosity is greater than 1000 cP, the viscosity is high and the first luminescent particles 220_E1 are evenly dispersed in the first luminescent resin solution 223_L. Does not work.

The patterning mold 510 is disposed on the first film 221 provided with the first light emitting resin solution 223_L. The lower roller 520 is disposed under the first film 221. The upper roller 530 is disposed on the patterning mold 510. The first film 221 and the patterning mold 510 are rolled using the lower roller 520 and the upper roller 530, and a first light emitting resin pattern is formed on the first film 221. Although the first light emitting resin pattern is not illustrated, it may be one having the same shape as the first light emitting resin pattern layer (223 in FIG. 8B).

1, 7 and 8B, the first light emitting resin pattern is cured to form the first light emitting resin pattern layer 223. The method for curing the first light-emitting resin pattern is not particularly limited as long as it is usually used, but may be performed by providing heat, UV, IR, and the like.

The thickness of the first light emitting resin pattern layer 223 (h1 in FIG. 3A) may be 20 to 40 μm. When the thickness of the first light emitting resin pattern layer 223 (h1 in FIG. 3A) is less than 20 μm, the thickness is small and the number of first light emitting particles 220_E1 included in the first light emitting resin pattern layer 223 is not sufficient. If the color reproducibility is poor and the thickness of the first light emitting resin pattern layer 223 (h1 in FIG. 3A) is greater than 40 μm, the thickness is large, and the first light emitting resin forming the first light emitting resin pattern layer 223 in the process It is difficult to control the amount of liquid (223_L in FIG. 8A).

Referring to FIGS. 1, 7 and 8C, the step (S120) of forming the second light emitting resin pattern layer 226 is performed on the first film 221 on which the first light emitting resin pattern layer 223 is formed. Disposing a film 222, providing a second light emitting resin solution 226_L between the first light emitting resin pattern layer 223 and the second film 222, the first light emitting resin pattern layer 223, and The method may include forming a second light emitting resin pattern between the second films 222 and forming a second light emitting resin pattern layer 226 by curing the second light emitting resin pattern.

The forming of the second light emitting resin pattern (S120) may include forming a second light emitting resin pattern by rolling the first film 221 and the second film 222.

1, 4, 7 and 8C, a second light emitting resin solution 226_L is provided between the first light emitting resin pattern layer 223 and the second film 222. The second light emitting resin solution 226_L includes the second resin solution 226_R and the second light emitting particles 220_E2. The second resin solution 226_R may include urethane resin, acrylic resin, or silicone resin. The second light emitting particles 220_E2 may be phosphors or quantum dots 220_Q.

The quantum dot 220_Q is not particularly limited as long as it is commonly used, for example, a II-VI compound, a II-V compound, a III-VI compound, a III-V compound, a IV-VI compound, Ⅰ It may include at least one of a -III-VI compound, a II-IV-VI compound, and a II-IV-V compound.

The quantum dot 220_Q may include a core 220_C and a shell 220_S overcoating the core 220_C. The core 220_C is not limited thereto, for example, CdS, CdSe, CdTe, ZnS, ZnSe, ZnTe, GaN, GaP, GaAs, GaSb, AlN, AlP, AlAs, AlSb, InP, InAs, InSb, SiC , Ca, Se, In, P, Fe, Pt, Ni, Co, Al, Ag, Au, Cu, FePt, Fe ₂ O ₃ , Fe ₃ O ₄ , Si, and Ge, and at least one of the shells 220_S Is not limited thereto, for example, ZnS, ZnSe, ZnTe, CdS, CdSe, CdTe, HgS, HgSe, HgTe, AlN, AlP, AlAs, AlSb, GaN, GaP, GaAs, GaSb, GaSe, InN, InP , InAs, InSb, TlN, TlP, TlAs, TlSb, PbS, PbSe and PbTe.

The second light emitting resin solution 226_L may have a viscosity of 1 to 1000 cP. If the viscosity is less than 1 cP, it is difficult to control the second luminescent resin solution 226_L in the process. If the viscosity is greater than 1000 cP, the viscosity is high, and the second luminescent particles 220_E2 are evenly dispersed in the second luminescent resin solution 226_L. Does not work.

The lower roller 520 is disposed under the first film 221 provided with the second luminous resin solution 226_L. The upper roller 530 is disposed on the second film 222. Rolling the first film 221 and the second film 222 using the lower roller 520 and the upper roller 530, the first light emitting resin pattern layer 223 and the second film 222 between the 2 Form a light emitting resin pattern. The second light emitting resin pattern is not illustrated, but may have the same shape as the second light emitting resin pattern layer 226.

1, 7 and 8D, the second light emitting resin pattern layer is cured to form a second light emitting resin pattern layer 226. The method for curing the second light-emitting resin pattern is not particularly limited as long as it is usually used, but may be performed by providing heat, UV, IR, and the like.

The thickness of the second light emitting resin pattern layer 226 (h2 in FIG. 3A) may be greater than or equal to the thickness of the first light emitting resin pattern layer 223 (h1 in FIG. 3A). If the thickness of the second light emitting resin pattern layer 226 (h2 in FIG. 3A) is smaller than the thickness of the first light emitting resin pattern layer 223 (h1 in FIG. 3A), the first film 221 and the second film ( An empty space may occur between 222), and accordingly, when a user views an image displayed on the display device 10, visibility may deteriorate.

Each of forming the first light emitting resin pattern layer 223 (S110) and forming the second light emitting resin pattern layer 226 (S120) may be performed multiple times. When each of the steps (S120) of forming the second light emitting resin pattern layer 226 is performed a plurality of times, a release film (not shown) may be provided on at least one surface of the second film 222. A release film is provided, so that the second light emitting resin pattern layer 226 and the second film 222 can be easily peeled off. The first light-emitting resin pattern layer 223 and the second light-emitting resin pattern layer 226 may be further formed on the peeled second light-emitting resin pattern layer 226. Accordingly, the light emitting sheet 220 having a sufficient thickness that can be used for the display device 10 can be manufactured according to a user's request.

In general, when a light emitting sheet is used by using a light emitting resin solution having a low viscosity of 1000 cP or less, the light emitting particles are not aggregated and can be evenly dispersed in the light emitting sheet, but the low viscosity light emitting resin solution has a low viscosity. It is not easy to control during the process. Further, when a light-emitting sheet is formed using a low-viscosity light-emitting resin solution, it is difficult to manufacture a light-emitting sheet having a uniform thickness while having a sufficient thickness to enhance color reproducibility.

A method of manufacturing a display device according to an exemplary embodiment of the present invention uses a light-emitting resin liquid having a low viscosity to form a first light-emitting resin pattern layer, and after forming a first light-emitting resin pattern layer, the second light-emitting resin By forming the pattern layer, the luminescent resin liquid having a low viscosity can be easily controlled during the process. Accordingly, a light-emitting sheet having a uniform thickness while having a sufficient thickness to enhance color reproducibility can be produced. A display device manufactured by a method of manufacturing a display device according to an exemplary embodiment of the present invention is formed using a luminescent resin solution having a low viscosity, has a sufficient thickness to increase color reproducibility, and has a uniform thickness. Including a light emitting sheet, it can have excellent color reproducibility.

Hereinafter, the present invention will be described in more detail through specific examples. The following examples are only examples to aid the understanding of the present invention, and the scope of the present invention is not limited thereto.

Example 1

A first film and a second film formed of polyethylene terephthalate (PET) were prepared. A first luminescent resin solution was provided on the first film. As the first luminescent resin solution, a first luminescent resin solution having a viscosity of 700 cP was prepared. The first luminescent resin solution contained a urethane resin as the first resin solution, and the first luminescent particles prepared quantum dots. The first luminescent particle has a core-shell structure, and a quantum dot including Ca as a core and ZnS as a shell was prepared.

The patterning mold was disposed on the first film provided with the first luminescent resin solution. A lower roller was placed under the first film. The upper roller was placed on the patterning mold. The first film and the patterning mold were rolled using a lower roller and an upper roller, and a first light emitting resin pattern was formed on the first film. The first luminescent resin pattern was cured with UV to form a first luminescent resin pattern layer having a shape of approximately 3A and having a thickness of 30 µm.

A second film was disposed on the first light emitting resin pattern layer, and a second light emitting resin solution was provided between the first light emitting resin pattern layer and the second film. As the second luminescent resin solution, a second luminescent resin solution having a viscosity of 700 cP was prepared. The second luminescent resin solution contained a urethane resin as the second resin solution, and the second luminescent particles prepared quantum dots having the same size as the first luminescent particles. The second luminescent particle has a core-shell structure, and a quantum dot including Ca as a core and ZnS as a shell was prepared.

The lower roller was disposed under the first film provided with the second luminous resin solution. An upper roller was placed on top of the second film. The first film and the second film were rolled using a lower roller and an upper roller, and a second luminescent resin pattern was formed between the first luminescent resin pattern layer and the second film. The second light-emitting resin pattern was cured with UV to form a second light-emitting resin pattern layer having a shape of approximately 3A and having a thickness of 30 μm.

The second film was peeled off from the second light-emitting resin pattern layer, and the first light-emitting resin pattern layer and the second light-emitting resin pattern layer were alternately further formed in two layers, thereby producing a light-emitting sheet.

The manufactured light emitting sheet was disposed on a backlight unit, and a display panel was disposed on the light emitting sheet to manufacture a display device.

Comparative Example 1

A light emitting sheet and a display device were manufactured in the same manner as in Example 1, except that a single layer of a light emitting resin layer was formed between the first film and the second film by lamination.

Experiment result

9 is a photograph taken in cross section of the light emitting sheet prepared in Example 1 of the present invention. Referring to FIG. 9, it can be seen that the first light emitting resin pattern layer and the second light emitting resin pattern layer were alternately formed in three layers in cross section. In Example 1, the sum of the thicknesses of the first light emitting resin pattern layer and the second light emitting resin pattern layer, that is, the thickness between the first film and the second film was measured, the thickness is 90 to 94 μm, and the tolerance is 4 μm. It was. In Comparative Example 1, the thickness of the light emitting resin layer was measured to be 86 to 100 μm, and the tolerance was 14 μm. It was confirmed that the production of the light-emitting sheet according to Example 1 can produce a light-emitting sheet having a uniform thickness, compared to the production of the light-emitting sheet according to Comparative Example 1.

The embodiments of the present invention have been described above with reference to the accompanying drawings, but those of ordinary skill in the art to which the present invention pertains can be implemented in other specific forms without changing the present invention to its technical spirit or essential features. You will understand that there is. Therefore, it should be understood that the embodiments described above are illustrative in all respects and not restrictive.

10: display device 100: display panel
200: backlight unit 220: light emitting sheet
221: first film 222: second film
223: first light emitting resin layer 226: second light emitting resin layer
510: patterning mold

Claims (16)

A first film;
A plurality of first agents formed on the first film, including a plurality of first protrusions and a plurality of first grooves formed between the first protrusions, and dispersed in the first resin layer and the first resin layer A first light emitting resin pattern layer including one light emitting particle;
A second film formed on the first light emitting resin pattern layer; And
It is formed between the first light emitting resin pattern layer and the second film, and includes a plurality of second protrusions and a plurality of second grooves formed between the second protrusions, the second resin layer and the second A second light emitting resin pattern layer including a plurality of second light emitting particles dispersed in the resin layer,
The first resin layer and the second resin layer are made of the same material,
The second protrusions respectively contact the first grooves,
The first protrusions each light-emitting sheet in contact with the second groove. According to claim 1,
Each of the first projections
A light emitting sheet having a shape of at least one of a triangle, a square, a part of a circle, and a part of an ellipse. According to claim 1,
The thickness of the second light emitting resin pattern layer is greater than or equal to the thickness of the first light emitting resin pattern layer A light emitting sheet. According to claim 1,
Each of the first light emitting particles and the second light emitting particles is a light emitting sheet that is a quantum dot. According to claim 1,
The first resin layer and the second resin layer is a light emitting sheet made of an acrylic resin. According to claim 1,
The first light-emitting resin pattern layer and the second light-emitting resin pattern layer is a light-emitting sheet in contact with each other without an empty space. According to claim 1,
The first film and the second film is a light emitting sheet composed of polyethylene terephthalate (PET). The method of claim 7,
Each of the first film and the second film includes a flat one surface, and the other surface opposite to the one surface and flat,
The first film and the second film is a light emitting sheet that is disposed parallel to each other. Forming a first light emitting resin pattern layer including a plurality of first protrusions and a plurality of first grooves formed between the first protrusions on the first film; And
Forming a second light emitting resin pattern layer including a plurality of second protrusions contacting the first grooves and a plurality of second grooves formed between the second protrusions and contacting the first protrusions. Including,
The step of forming the first light emitting resin pattern layer
Disposing a patterning mold on the first film;
Providing a luminescent resin solution comprising a plurality of luminescent particles and a resin solution between the first film and the patterning mold;
Forming the first light emitting resin pattern by rolling the first film and the patterning mold; And
Curing the first light emitting resin pattern to form the first light emitting resin pattern layer on the first film,
The step of forming the second light emitting resin pattern layer is
Disposing a second film on the first film on which the first light emitting resin pattern layer is formed;
Providing the luminescent resin solution between the first luminescent resin pattern layer and the second film;
And forming the second light emitting resin pattern by rolling the first film and the second film; And
And curing the second light emitting resin pattern to form the second light emitting resin pattern layer. The method of claim 9,
The step of forming the first light emitting resin pattern layer and the step of forming the second light emitting resin pattern layer are continuously performed. The method of claim 9,
The light-emitting resin solution is a method of manufacturing a light-emitting sheet made of an acrylic resin. The method of claim 9,
The first light emitting resin pattern layer and the second light emitting resin pattern layer is a method of manufacturing a light emitting sheet in contact with each other without an empty space. The method of claim 9,
The first film and the second film is a method of manufacturing a light emitting sheet composed of polyethylene terephthalate (PET). The method of claim 13,
Each of the first film and the second film has a flat one surface, and a flat other surface opposite to the one surface,
The first film and the second film is a method of manufacturing a light emitting sheet disposed in parallel to each other. The method of claim 9,
The luminescent resin solution is a method of manufacturing a luminescent sheet having a viscosity of 1 to 1000cP. A first film;
A first light emitting resin pattern layer formed on the first film and including a plurality of first protrusions and a plurality of first grooves formed between the first protrusions;
A second film formed on the first light emitting resin pattern layer; And
It is formed between the first light emitting resin pattern layer and the second film, and includes a second light emitting resin pattern layer including a plurality of second protrusions and a plurality of second grooves formed between the second protrusions, ,
The first light emitting resin pattern layer and the second light emitting resin pattern layer include a resin layer made of the same material and a plurality of light emitting materials,
The light emitting material includes a first quantum dot that emits green light and a second quantum dot that emits red light,
Each of the second protrusions contacts the first grooves,
The first projections each of the light emitting sheet in contact with the second groove.

Images