KR102313367B1 - organic light emitting display apparatus - Google Patents

Abstract

According to an embodiment of the present invention, a substrate, an organic light emitting device layer disposed on the substrate, the organic light emitting device layer including sub-pixels each including an organic light emitting device including a first electrode, a light emitting layer, and a second electrode, is formed, and the organic light emitting device layer an encapsulation film formed thereon and including at least one inorganic layer and at least one organic layer, and a first surface disposed on the encapsulation film and having a first refractive index and having a first surface parallel to the substrate and an inclined surface inclined with respect to the first surface an intermediate layer, and a first lens layer in direct contact with the inclined surface of the intermediate layer and having a second refractive index greater than the first refractive index, the contact surface between the inclined surface of the intermediate layer and the first lens layer forming a first lens, and the first lens is negative An organic light emitting diode display is provided, which is located in a periphery of at least one sub-pixel among pixels.

Description

Organic light emitting display apparatus

Embodiments of the present invention relate to an organic light emitting diode display.

BACKGROUND ART A display device is a device that displays an image, and an organic light emitting diode display (OLED) display has recently been attracting attention.

The organic light emitting diode display has a self-luminous property, and unlike a liquid crystal display device, it does not require a separate light source, so a thickness and weight can be reduced. In addition, the organic light emitting diode display exhibits high quality characteristics such as low power consumption, high luminance, and high response speed.

SUMMARY Embodiments of the present invention provide an organic light emitting diode display.

One embodiment of the present invention, a substrate; an organic light emitting device layer disposed on the substrate and including sub-pixels each including an organic light emitting device including a first electrode, a light emitting layer, and a second electrode; an encapsulation film formed on the organic light emitting device layer and including at least one inorganic layer and at least one organic layer; an intermediate layer disposed on the encapsulation layer, the intermediate layer having a first refractive index and having a first surface parallel to the substrate and an inclined surface inclined with respect to the first surface; and a first lens layer in direct contact with the inclined surface of the intermediate layer and having a second refractive index greater than the first refractive index, wherein the contact surface of the inclined surface of the intermediate layer and the first lens layer forms a first lens, and Disclosed is an organic light emitting display device in which a first lens is located in a peripheral portion of at least one of the subpixels.

a reflection control layer formed on the encapsulation layer, the reflection control layer including color filters corresponding to each of the sub-pixels, and a light blocking portion between the color filters, wherein the first lens includes the light blocking portion and a portion of the light blocking portion It overlaps, and may entirely surround a periphery of at least one of the sub-pixels.

The first lens layer may include an acrylic material.

An upper surface of the first lens layer may be flat.

The initial angle of the first lens may be greater than about 40 degrees.

The light emitted from the sub-pixels may travel in a direction from the substrate toward the encapsulation layer, and the first lens may include a convex surface in a direction opposite to the traveling direction of the light emitted from the sub-pixels.

The sub-pixels include a first sub-pixel, a second sub-pixel, and a third sub-pixel emitting light of different colors, and among the first sub-pixel, the second sub-pixel, and the third sub-pixel A second lens corresponding to any one sub-pixel may be further included.

The second lens may overlap a central portion of any one of the sub-pixels.

The initial angle of the second lens may be greater than about 30 degrees.

The light emitted from the sub-pixels may travel in a direction from the substrate toward the encapsulation film, and the second lens may include a convex surface in the same direction as the traveling direction of the light emitted from the sub-pixels.

Another embodiment of the present invention, a substrate; an organic light emitting device layer disposed on the substrate and including a sub-pixel including an organic light emitting device including a first electrode, a light emitting layer, and a second electrode; an encapsulation film formed on the organic light emitting device layer and including at least one inorganic layer and at least one organic layer; an intermediate layer disposed on the encapsulation layer , the intermediate layer having a first refractive index and having a first surface parallel to the substrate and an inclined surface inclined with respect to the first surface; and a first lens layer in direct contact with the inclined surface of the intermediate layer and having a second refractive index greater than the first refractive index; and a contact surface between the inclined surface of the intermediate layer and the first lens layer, and the first lens is disposed at a position spaced apart from the center of the sub-pixel .

The first lens layer includes an acrylic material.

An upper surface of the first lens layer may be flat.

It further includes a second lens overlapping the sub-pixel, the center of the first lens and the center of the second lens may be spaced apart from each other.

A reflection control layer formed on the encapsulation layer and including a color filter corresponding to the sub-pixel and a light blocking part; may be further included.

The first lens may partially overlap the light blocking portion and may entirely surround the sub-pixel.

The light emitted from the sub-pixels travels in a direction from the substrate toward the encapsulation film, and the first lens includes a convex surface in a direction opposite to the traveling direction of the light emitted from the sub-pixels, and the second The lens may include a convex surface toward the same direction as the traveling direction of the light.

The initial angle of the first lens may be greater than about 40 degrees.

The initial angle of the second lens may be greater than about 30 degrees.

Other aspects, features and advantages other than those described above will become apparent from the following drawings, claims, and detailed description of the invention.

The optical characteristics of the organic light emitting diode display according to the embodiments of the present invention may be improved.

1 is a cross-sectional view schematically illustrating an organic light emitting display device according to an exemplary embodiment.
FIG. 2 is a cross-sectional view illustrating an organic light emitting display layer and an encapsulation film corresponding to one sub-pixel of the organic light emitting diode display of FIG. 1 .
3 is a plan view illustrating an arrangement of sub-pixels, a light blocking unit, a first lens, and a second lens of an organic light emitting diode display according to an exemplary embodiment of the present invention.
4A is a plan view illustrating an arrangement of sub-pixels, a light blocking unit, a first lens, and a second lens of an organic light emitting diode display according to another exemplary embodiment of the present invention.
4B is a side cross-sectional view illustrating a bent state of the organic light emitting diode display of FIG. 4A .
FIG. 5 is a cross-sectional view showing a partial excerpt of an intermediate layer and an optical film positioned on one sub-pixel of FIG. 1 .
6A to 6C are cross-sectional views schematically illustrating an organic light emitting diode display according to another exemplary embodiment.

Since the present invention can apply various transformations and can have various embodiments, specific embodiments are illustrated in the drawings and described in detail in the detailed description. Effects and features of the present invention, and a method of achieving them, will become apparent with reference to the embodiments described below in detail in conjunction with the drawings. However, the present invention is not limited to the embodiments disclosed below and may be implemented in various forms.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, and when described with reference to the drawings, the same or corresponding components are given the same reference numerals, and the overlapping description thereof will be omitted. .

In the following embodiments, terms such as first, second, etc. are used for the purpose of distinguishing one component from another, not in a limiting sense.

In the following examples, the singular expression includes the plural expression unless the context clearly dictates otherwise.

In the following embodiments, terms such as include or have means that the features or components described in the specification are present, and the possibility of adding one or more other features or components is not excluded in advance.

In the following embodiments, when it is said that a part such as a film, region, or component is on or on another part, it is not only when it is directly on the other part, but also another film, region, component, etc. is interposed therebetween. Including cases where there is

In the drawings, the size of the components may be exaggerated or reduced for convenience of description. For example, since the size and thickness of each component shown in the drawings are arbitrarily indicated for convenience of description, the present invention is not necessarily limited to the illustrated bar.

Where certain embodiments are otherwise feasible, a specific process sequence may be performed different from the described sequence. For example, two processes described in succession may be performed substantially simultaneously, or may be performed in an order opposite to the order described.

1 is a cross-sectional view schematically illustrating an organic light emitting diode display according to an embodiment of the present invention, and FIG. 2 is an extract showing an organic light emitting display layer and an encapsulation film corresponding to one sub-pixel of the organic light emitting display of FIG. 1 . It is a cross section.

The organic light emitting diode display according to an exemplary embodiment may include a substrate 10 , an organic light emitting device layer 20 , an encapsulation film 30 , an intermediate layer 40 , and an optical film 80 .

The substrate 10 may be formed of various materials such as a glass material, a metal material, or a plastic material including polyethylen terephthalate (PET), polyethylen naphthalate (PEN), polyimide, or the like. When the substrate 10 is formed of a plastic material, it may have flexibility.

The organic light emitting device layer 20 is formed on the substrate 10 and may include a plurality of organic light emitting devices emitting light of different colors. Each organic light emitting device may form a sub-pixel. In an embodiment, an organic light emitting device (OLED) emitting red light forms a first sub-pixel P1, and an organic light emitting device (OLED) emitting green light is a second sub-pixel The organic light emitting diode OLED that forms the pixel P2 and emits blue light may form the third subpixel P3 .

Referring to FIG. 2 , each organic light emitting diode (OLED) includes a pixel electrode 210 , a light emitting layer 220 , and a counter electrode 230 , and a thin film transistor (TFT) for driving the organic light emitting diode (OLED). ) and the storage capacitor Cap, and is electrically connected to the pixel circuit.

The pixel electrode 210 may be formed to be a (semi)transparent electrode or a reflective electrode. In the case of forming a (semi)transparent electrode, for example, indium tin oxide (ITO), indium zinc oxide (IZO), zinc oxide (ZnO), indium oxide (In2O3 indium oxide), It may be formed of indium gallium oxide (IGO) or aluminum zinc oxide (AZO). In the case of forming a reflective electrode, a reflective film is formed with Ag, Mg, Al, Pt, Pd, Au, Ni, Nd, Ir, Cr, or a compound thereof, and the reflective film is formed of ITO, IZO, ZnO or In2O3 on the reflective film. film can be formed. The configuration and material of the pixel electrode 210 are not limited thereto, and various modifications are possible, such as being formed of other materials or having a multi-layered structure.

The emission layer 220 may include an organic material that emits red, green, and blue light. The organic material emitting light may be a low molecular weight or high molecular weight organic material, and at least one of a hole transport layer, a hole injection layer, an electron transport layer, and an electron injection layer may be formed on the light emitting layer 220 depending on the organic material included in the light emitting layer 220 . can

The counter electrode 230 may be integrally formed over a plurality of sub-pixels. The counter electrode 230 may be formed to be a (semi)transparent electrode or a reflective electrode. In the case of forming a (semi) transparent electrode, a layer made of Li, Ca, LiF/Ca, LiF/Al, Al, Mg or a compound thereof is formed, and a (semi) layer such as ITO, IZO, ZnO or In2O3 ) can be formed as a (semi)transparent electrode by forming a layer formed of a transparent material. When forming the reflective electrode, for example, a layer including at least one of Li, Ca, LiF/Ca, LiF/Al, Al, Ag, and Mg may be formed to form the reflective electrode. The configuration and material of the counter electrode 230 is not limited thereto, and various modifications are possible, such as being formed of other materials or having a multi-layered structure.

The encapsulation film 30 may be formed on the organic light emitting element layer 20 to protect the organic light emitting element layer 20 from foreign substances and/or external air. In an embodiment, the encapsulation film 30 may be formed of a glass material, and the encapsulation film 30 and the substrate 10 may be attached to each other by a sealant (not shown). In another embodiment, the encapsulation film 30 may be formed by alternately stacking the inorganic layers 310 and the organic layers 320 as shown in FIG. 3 .

Referring to FIG. 1 , the optical film 80 is disposed on a propagation path of light emitted from each sub-pixel. For example, the optical film 80 is positioned on the encapsulation film 30 , and the intermediate layer 40 is positioned under the optical film 80 . The optical film 80 may include a reflection control layer 50 , a first lens 60 formed under the reflection control layer 50 , and a second lens 70 formed on the reflection control layer 50 . .

The reflection control layer 50 includes a color filter 52 formed at a position corresponding to each sub-pixel and a light blocking unit 51 formed between adjacent sub-pixels (or between neighboring color filters 52 ). do. For example, a red color filter 52a is formed on the first sub-pixel P1 provided with an organic light emitting device OLED emitting red light, and an organic light emitting device OLED emitting green light is provided. A green color filter 52b is formed on the second subpixel P2, and a red color filter 52c is formed on the third subpixel P3 provided with an organic light emitting diode (OLED) emitting blue light. is formed The light blocking part 51 is formed between the color filters 52 as shown in FIGS. 4, 5A and 5B . For example, the light blocking portion 51 may be formed to surround the peripheral portion of each sub-pixel and include the first opening OP1 .

When external light is incident on the color filter 52 , only a very small amount of the incident external light is reflected, so that visibility of external light can be improved and image sharpness can be improved. The light blocking unit 51 is to reduce contrast due to the lower reflection of external light, and may include a black matrix that absorbs light having a wavelength of a visible light region. Here, the lower reflection indicates that external light is reflected by an electrode, a wiring layer, or the substrate 10 of the organic light emitting diode (OLED) positioned below the reflection control layer 50 .

When a polarizing plate is used to reduce external light reflection, there is a problem in that the manufacturing cost increases, and the thickness of the polarizing plate is relatively thick, so there is a problem in that it is not bent. However, since the reflection control layer 50 according to the embodiment of the present invention is formed by using the color filter 52 and the light blocking unit 51, manufacturing cost can be reduced and it can be formed to a thinner thickness than the polarizing plate, so that it is flexible. can be obtained

The first lens 60 may be formed under the reflection control layer 50 , and the second lens 70 may be formed on the reflection control layer 50 . The first lens 60 is formed to correspond to at least one of the first sub-pixel P1, the second sub-pixel P2, and the third sub-pixel P3, and a light blocking part ( 51) and may be formed adjacent to it. For example, the first lens 60 may be formed to correspond to the first subpixel P1 , the second subpixel P2 , and the third subpixel P3 .

The second lens 70 is differentially formed for each pixel. For example, the second lens 70 is formed to correspond to any one of the first and second subpixels P1 and P2 among the first to third subpixels P1 to P3, and the third subpixel P3 ) and is not formed in the corresponding area. Through such a configuration, the first lens 60 and the second lens 70 may correct color in the side of the organic light emitting diode display and improve side luminance and overall light efficiency. Hereinafter, the first and second lenses will be described in more detail with reference to FIGS. 3 to 5B .

3 is a plan view illustrating an arrangement of sub-pixels, a light blocking unit, a first lens, and a second lens of an organic light emitting diode display according to an embodiment of the present invention, and FIG. 4A is an organic light emitting diode according to another embodiment of the present invention. It is a plan view illustrating the arrangement of sub-pixels, a light blocking unit, a first lens, and a second lens of a display device, and FIG. 4B is a side cross-sectional view illustrating a bent state of the organic light emitting diode display of FIG. 4A . FIG. 5 is a cross-sectional view showing a partial excerpt of an intermediate layer and an optical film positioned on one sub-pixel of FIG. 1 .

The first lens 60 may correspond to at least one of the first to third subpixels P1 to P3. In an embodiment, the first lens 60 may be disposed adjacent to the light blocking unit 51 at a position corresponding to the peripheral portion of each sub-pixel. For example, as shown in FIG. 1 , the first lens 60 may be formed to correspond to peripheral portions of the first to third subpixels P1 to P3 .

The first lens 60 is formed around the first sub-pixel P1 , the second sub-pixel P2 , and the third sub-pixel P3 , and forms an area OL partially overlapping the light blocking part 51 . may include Accordingly, the first lens 60 changes the traveling path so that the light traveling toward the light blocking unit 51 is emitted to the outside among the light emitted from the organic light emitting diode (OLED).

The first lens 60 may have a convex surface in a direction opposite to the light propagation path (D3 direction) and may be formed of a material having a relatively high refractive index. For example, the first lens 60 may be formed of a silicon-based material having a refractive index of about 1.5 to 1.9. On the other hand, since the intermediate layer 40 in contact with the first lens 60 is formed of air (refractive index 1) or an acryl-based material having a refractive index of about 1 to 1.4, a light-blocking part among the light emitted from the organic light emitting diode (OLED). The light directed toward 51 is refracted and is not absorbed by the light blocking part 51 and may be emitted to the outside through the first opening OP1 . Meanwhile, when the intermediate layer 40 is formed of a polymer material such as an acrylic material having a refractive index of about 1 to 1.4, the intermediate layer 40 may also function as an adhesive layer.

The first lens 60 may be formed to at least partially surround the periphery of each sub-pixel at a position corresponding to the periphery of each sub-pixel. As an embodiment, as shown in FIG. 3 , the first lens 60 may be formed at a position corresponding to the periphery of the sub-pixel, and may be formed to completely surround the periphery of the sub-pixel. As described above, a portion of the first lens 60 is formed to overlap the light blocking portion 51 and the rest is formed to be exposed through the first opening OP1 without overlapping with the light blocking portion 51 , so that the first The first opening OP2 formed by the lens 60 is smaller than the first opening OP1 .

As another embodiment, when the first opening OP1 is formed of a polygon having at least four corners, the first lens 60 may be formed along at least two of the corners of the first opening OP1. . For example, as shown in FIG. 4A , the first lens 60 may be formed along two parallel corners among corners of the quadrangular first opening OP1 . In this case, even if the organic light emitting diode display is bent along the D2 direction as shown in FIG. 4B , the first lens 60 is not broken.

The second lens 70 has a convex surface toward the traveling path (D2 direction) of the light emitted from the organic light emitting diode (OLED), and diffuses the light passing through the reflection control layer 50 .

The second lens 70 may be formed to correspond to the center of at least one of the first subpixel P1 and the second subpixel P2 . For example, the second lens 70 is formed at a position corresponding to the center of the first sub-pixel P1 emitting red light and the second sub-pixel P2 emitting green light, and emitting blue light. It may not be formed in a position corresponding to the third sub-pixel P3.

As a comparative example of the present invention, when the optical film 80 includes only the reflection control layer 50 including the color filter 52 and the light blocking part 51 , the light emitted from the blue sub-pixel affects the adjacent sub-pixels. Even if given, the optical film 80 cannot control it. In this case, a blueish color may be visually recognized from the side of the organic light emitting diode display.

However, according to the embodiment of the present invention, since the second lens 70 is formed to correspond to the first and second sub-pixels P1 and P2 from which red and green light are emitted, the red and green light is emitted from the side surface. As it diffuses more, the blueish color that was recognized from the side can be suppressed. In addition, since the amount of light traveling laterally by the second lens 70 increases, the luminance of the side may be increased.

As described above, the first lens 60 changes the path of light directed to the light blocking unit 51 , and the second lens 70 diffuses the light. As described above, since the functions of the first lens 60 and the second lens 70 are different from each other, the curvatures of the first lens 60 and the second lens 70 may be different from each other. The second lens 70 may have a curvature smaller than that of the first lens 60 so that diffusion may occur in several directions.

For example, as shown in FIG. 5 , the first lens 60 may have a height h1 of about 1.0 to 5.0 μm and an initial angle θ1 greater than about 40 degrees, and the second lens 70 . may have a height h2 of about 1.0 μm or more and an initial angle θ2 greater than about 30 degrees. Here, the initial angle represents an angle between a plane (a plane along the D2 direction) perpendicular to the light emission direction (D3) and a plane (S1, S2) tangent to a normal line passing through the end of the convex surface of the lens.

The width of the first lens 60 is 1 of the width of the first opening OP1 so that light, which is emitted from the organic light emitting diode (OLED), which travels straight along the D3 direction, does not pass through the first lens 60 . It may be formed smaller than /2.

The second lens may be formed not to overlap with the first lens. When the second lens has a width large enough to overlap the first lens, most of the light emitted to the outside passes through the second lens. That is, since a lot of diffusion occurs laterally, the efficiency at the front may be greatly reduced. To prevent this, the second lens may be formed not to overlap with the first lens.

Table 1 below is a simulation result showing the optical efficiency of the organic light emitting diode display according to the comparative example of the present invention and the organic light emitting display according to the exemplary embodiment of the present invention.

The organic light emitting diode display according to the comparative example of the present invention includes an encapsulation film 30 , an intermediate layer 40 , and a color filter 52 formed on the organic light emitting element layer 20 having a blueish color from the side, and light blocking. and an optical film having only a reflection control layer 50 having a layer. On the other hand, in the organic light emitting diode display according to an embodiment of the present invention, the encapsulation film 30 , the intermediate layer 40 , and the intermediate layer 40 formed on the organic light emitting element layer 20 having a blueish color from the side are shown in FIG. 1 . and an optical film 80 having the structure as described above.

comparative example one embodiment of the present invention Frontal efficiency (%) 100.0% 84.0% Overall efficiency (%) 100.0% 129.1% Color coordinates at lateral viewing angle (CIEx, 60°) 0.26 0.30

Referring to Table 1, when the light efficiency of the organic light emitting diode display according to the comparative example is 100.0%, the light efficiency is lowered to 84.0% at the front of the organic light emitting display according to the embodiment of the present invention, but in the side view As the light efficiency is improved, it can be seen that the total light efficiency is increased to 129.1%.

Since the second lens 70 is formed at positions corresponding to the red sub-pixel and the green sub-pixel to diffuse the red and green light, the light efficiency at the front is reduced by about 26.0%, but the second lens ( 70), and the light emitted to the outside without being absorbed by the light blocking unit 51 by the first lens 60 increased, the overall efficiency was increased by about 29.1%. In addition, the blueish color recognized at a side viewing angle of 60° was suppressed. In the side viewing angle of Table 1, the color coordinates are closer to white light as the numerical value increases.

6A to 6C are cross-sectional views schematically illustrating an organic light emitting diode display according to another exemplary embodiment.

6A to 6B , the second lens 70 may be formed to correspond to any one of the red first sub-pixel P1 and the green second sub-pixel P2. , as shown in FIG. 6C , the first lens 60 is formed only in the red and green first and second sub-pixels P1 and P2 among the first to third sub-pixels P1 to P3 in consideration of overall light efficiency. could be

In the above-described embodiments, the first and second sub-pixels P1 and P2 are sub-pixels emitting red and green light, respectively, and the second lens 70 is the first and second sub-pixels P1 and P2. The case where it is formed to correspond to and suppresses the blueish color and increases the side luminance has been described, but the present invention is not limited thereto.

In the case of an organic light emitting diode display, depending on the specific structure of the pixel circuit included in the organic light emitting device layer 20 and the structure of the organic light emitting device (OLED), it is blueish, redish, or greenish from the side. ) can produce a single color. However, according to an embodiment of the present invention, by selectively/differentially disposing the second lens 70, a phenomenon in which a specific color is generated from the side can be suppressed. For example, the first and second sub-pixels P1 and P2 are sub-pixels emitting green and blue light, respectively, and the second lens 70 is formed to correspond to the first and second sub-pixels P1 and P2. It is possible to suppress the redish color and increase the side luminance. In another embodiment, the first and second sub-pixels P1 and P2 are sub-pixels emitting blue and red light, respectively, and the second lens 70 is connected to the first and second sub-pixels P1 and P2. It is formed correspondingly to suppress a greenish color and increase the side luminance.

As described above, the present invention has been described with reference to one embodiment shown in the drawings, but it will be understood by those skilled in the art that various modifications and variations of the embodiments are possible therefrom. Accordingly, the true technical protection scope of the present invention should be determined by the technical spirit of the appended claims.

10: substrate
20: organic light emitting device layer
30: encapsulation film
40: middle layer
50: reflection control layer
51: color filter
52: light blocking unit
60: first lens
70: second lens

Claims (19)

Board;
an organic light emitting device layer disposed on the substrate and including sub-pixels each including an organic light emitting device including a first electrode, a light emitting layer, and a second electrode;
an encapsulation film formed on the organic light emitting device layer and including at least one inorganic layer and at least one organic layer;
an intermediate layer disposed on the encapsulation layer, the intermediate layer having a first refractive index and having a first surface parallel to the substrate and an inclined surface inclined with respect to the first surface; and
a first lens layer in direct contact with the inclined surface of the intermediate layer and having a second refractive index greater than the first refractive index;
including,
and a contact surface between the inclined surface of the intermediate layer and the first lens layer forms a first lens, and the first lens is located in a periphery of at least one of the sub-pixels. According to claim 1,
a reflection control layer formed on the encapsulation layer, the reflection control layer including color filters corresponding to each of the sub-pixels, and a light blocking part between the color filters;
The first lens partially overlaps the light blocking portion and entirely surrounds a periphery of at least one of the sub-pixels. According to claim 1,
The first lens layer includes an acrylic material. According to claim 1,
and an upper surface of the first lens layer is flat. According to claim 1,
and an initial angle of the first lens is greater than 40 degrees. According to claim 1,
Light emitted from the sub-pixels travels in a direction from the substrate toward the encapsulation film,
and the first lens includes a convex surface in a direction opposite to a traveling direction of the light emitted from the sub-pixels. According to claim 1,
The sub-pixels include a first sub-pixel, a second sub-pixel, and a third sub-pixel emitting light of different colors,
and a second lens corresponding to any one of the first subpixel, the second subpixel, and the third subpixel. 8. The method of claim 7,
and the second lens overlaps a central portion of the one of the sub-pixels. 8. The method of claim 7,
and an initial angle of the second lens is greater than 30 degrees. 8. The method of claim 7,
Light emitted from the sub-pixels travels in a direction from the substrate toward the encapsulation film,
and the second lens includes a convex surface in the same direction as the propagation direction of the light emitted from the sub-pixels. Board;
an organic light emitting device layer disposed on the substrate and having a sub-pixel including an organic light emitting device including a first electrode, a light emitting layer, and a second electrode;
an encapsulation film formed on the organic light emitting device layer and including at least one inorganic layer and at least one organic layer;
an intermediate layer disposed on the encapsulation layer, the intermediate layer having a first refractive index and having a first surface parallel to the substrate and an inclined surface inclined with respect to the first surface; and
a first lens layer in direct contact with the inclined surface of the intermediate layer and having a second refractive index greater than the first refractive index;
including,
and a contact surface between the inclined surface of the intermediate layer and the first lens layer forms a first lens, and the first lens is disposed at a position spaced apart from the center of the sub-pixel. 12. The method of claim 11,
The first lens layer includes an acrylic material. 12. The method of claim 11,
and an upper surface of the first lens layer is flat. 12. The method of claim 11,
and a second lens overlapping the sub-pixel, wherein a center of the first lens and a center of the second lens are spaced apart from each other. 15. The method according to any one of claims 11 to 14,
and a reflection control layer formed on the encapsulation layer and including a color filter corresponding to the sub-pixel and a light blocking part. 16. The method of claim 15,
The first lens partially overlaps the light blocking portion and entirely surrounds the sub-pixel. 15. The method of claim 14,
The light emitted from the sub-pixel travels in a direction from the substrate toward the encapsulation film,
The first lens includes a convex surface in a direction opposite to the traveling direction of the light emitted from the sub-pixels,
and the second lens includes a convex surface in the same direction as the light traveling direction. 17. The method of claim 16,
and an initial angle of the first lens is greater than 40 degrees. 17. The method of claim 16,
and an initial angle of the second lens is greater than 30 degrees.

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