KR102136220B1 - Organic light emitting display device with insulating layer formed as multilayered structure - Google Patents

Abstract

The present invention includes a substrate, an insulating layer disposed on the substrate, and a display element layer disposed on the insulating layer, wherein the insulating layer includes at least one low refractive layer and at least one high refractive layer. Provide a device.

Description

Organic light emitting display device including an insulating layer formed of a multi-layer structure {ORGANIC LIGHT EMITTING DISPLAY DEVICE WITH INSULATING LAYER FORMED AS MULTILAYERED STRUCTURE}

The present invention relates to an organic light emitting display device, and more particularly, to an organic light emitting display device including an insulating layer formed of a multi-layer structure.

An organic light emitting display device is a self-luminous display device that displays an image with an organic light emitting diode that emits light.

Unlike a liquid crystal display, an organic light emitting display device does not require a separate light source, and thus can relatively reduce thickness and weight. In addition, the organic light emitting display device has attracted attention as a next-generation display device for portable electronic devices because it exhibits high quality characteristics such as low power consumption, high luminance, and high reaction speed.

In general, the organic light emitting device has a hole injection electrode, an organic emission layer and an electron injection electrode. The organic light emitting device generates light by energy generated when excitons formed by combining holes supplied from a hole injection electrode and electrons supplied from an electron injection electrode in an organic emission layer fall to a ground state.

The organic light emitting display device is divided into a front emission type organic emission display device and a rear emission type organic emission display device according to a direction in which light generated from the organic emission layer is emitted.

In the case of the rear emission type organic light emitting diode display, since the self-emission efficiency is not high, an optical cavity layer that causes optical resonance may be provided to improve the emission efficiency.

The light generated in the light emitting layer is repeatedly reflected within the optical cavity layer, thereby causing constructive interference or canceling interference. That is, light of a specific wavelength is amplified and light of a different wavelength is canceled so that only light of a specific wavelength selectively passes through the optical cavity layer. Accordingly, light emission efficiency, luminance, and color purity of the organic light emitting diode display including the optical cavity layer may be improved.

However, since the optical distance between the optical cavity layers is set to an optimal distance when viewed from the front of the organic light emitting diode display including the optical cavity layer, there is a change in the interference length of light when viewed from the side. As a result, as the viewing angle is changed, luminance and color shift are reduced compared to the front, thereby causing a problem that the overall display characteristics are deteriorated.

In order to solve the above-mentioned problems, an object of the present invention is to provide an organic light emitting display device having less luminance and color shift compared to the front even when the viewing angle is changed.

An organic light emitting device according to an embodiment of the present invention for achieving the above object, a substrate; An insulating layer disposed on the substrate; And a display element layer disposed on the insulating layer, wherein the insulating layer includes at least one low refractive layer and at least one high refractive layer, wherein the refractive index of the low refractive layer is 1.3 or more and less than 1.6, and The refractive index of the high refractive layer is 1.6 or more and 2.4 or less, the thickness of the low refractive layer is 1750 mm or more and 6000 mm or less, and the thickness of the high refractive layer may be 3000 mm or more and 8000 mm or less.

A color filter layer may be disposed between the substrate and the insulating layer.

The display element layer may include a first electrode disposed on the insulating layer, a light emitting layer disposed on the first electrode, and a second electrode disposed on the light emitting layer.

The low refractive layer and the high refractive layer may be alternately formed.

The low refractive layer is SiO ₂ And MgF ₃ It may include at least one of.

The high refractive layer may include at least one of Si ₃ N ₄ , TiO ₂ , MgO, Al ₂ O ₃ , SiO and ZnS.

A thin film transistor (TFT) layer electrically connected to the first electrode may be provided between the substrate and the insulating layer.

A color filter layer may be provided between the thin film transistor (TFT) layer and the insulating layer.

On the other hand, an organic light emitting device according to another embodiment of the present invention for achieving the above object, a substrate; an insulating layer disposed on the substrate; A first electrode disposed on the insulating layer; A light emitting layer disposed on the first electrode; And a second electrode disposed on the light emitting layer, wherein the insulating layer includes at least one low refractive layer and at least one high refractive layer, wherein the refractive index of the low refractive layer is 1.3 or more and less than 1.6, and the high refractive index The refractive index of the layer is 1.6 or more and 2.4 or less, the thickness of the low refractive layer is 1750 mm or more and 6000 mm or less, and the thickness of the high refractive layer may be 3000 mm or more to 8000 mm or less.

A pixel defining layer disposed on the insulating layer and the first electrode and dividing the first electrode into a light emitting region and a non-light emitting region may be included.

A color filter layer may be disposed between the substrate and the insulating layer.

In the organic light emitting diode display according to an example of the present invention, an insulating layer serving as an optical cavity layer may be formed in a multi-layer structure to reduce luminance change and color change compared to the front side according to a change in viewing angle.

1 is a view showing an organic light emitting display device including an insulating layer formed of a conventional single-layer structure.
2 is a view showing a resonance spectrum of an organic light emitting diode display including an insulating layer formed of a conventional single layer structure.
3 is a view showing an organic light emitting display device including an insulating layer formed of a multi-layer structure according to an embodiment of the present invention.
4 is a view showing an organic light emitting diode display including an insulating layer formed of a multi-layer structure according to another embodiment of the present invention.
5 is a diagram illustrating a resonance spectrum of an organic light emitting diode display including an insulating layer formed of a multilayer structure according to an embodiment of the present invention.
6 is a view showing color change according to a viewing angle of an organic light emitting display device including an insulating layer formed of a multilayer structure according to an embodiment of the present invention.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

The present invention can be modified in various ways, and can be implemented in various forms, and only specific embodiments are illustrated in the drawings, and the main body will be described. However, it is to be understood that the scope of the present invention is not limited to the above specific embodiments, and all modifications, equivalents, or substitutes included in the spirit and scope of the present invention are included in the scope of the present invention.

In the present specification, specific structural or functional descriptions are merely exemplified for the purpose of describing the embodiments of the present invention, and the embodiments of the present invention can be implemented in various forms and are limited to the embodiments described herein. It should not be interpreted as being, and should be understood to include all modifications, equivalents, or substitutes included in the spirit and scope of the present invention.

It should be understood that when a component is described as being “connected” or “contacted” to another component, it may be directly connected to or in contact with another component, but another component may be present in the middle. something to do.

Also, when it is described that one component is "directly connected" or "collectively contact" to another component, it can be understood that another component is not present in the middle. Other expressions describing the relationship between the components, for example, "between" and "directly between" or "adjacent to" and "directly adjacent to" may be interpreted similarly.

The terms used in this specification are only used to describe exemplary embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise.

In this specification, the terms "include", "have" or "have" are intended to designate the presence of implemented features, numbers, steps, actions, components, parts or combinations thereof, one or more thereof. It should be understood that the above other features or numbers, steps, actions, components, parts, or combinations thereof are not excluded in advance. Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by a person skilled in the art to which the present invention pertains. Terms, such as those defined in a commonly used dictionary, should be interpreted as having meanings consistent with meanings in the context of related technologies, and should not be interpreted as ideal or excessively formal meanings unless explicitly defined in the present application. Does not.

Terms such as first, second, and third may be used to describe various components, but these components are not limited by the terms. The terms are used for the purpose of distinguishing one component from other components. For example, without departing from the scope of the present invention, the first component may be referred to as a second or third component, etc., and similarly, the second or third component may also be alternately named.

In order to clearly describe the present invention, parts irrelevant to the description are omitted, and the same reference numerals are assigned to the same or similar elements throughout the specification. In addition, since the size and thickness of each component shown in the drawings are arbitrarily shown for convenience of description, the present invention is not necessarily limited by what is disclosed in the drawings.

In the drawings, thicknesses are enlarged to clearly represent various layers and regions. In addition, in the drawings, thicknesses of some layers and regions are exaggerated for convenience of description.

1 is a view showing an organic light emitting display device including an insulating layer formed of a conventional single-layer structure. The organic light emitting diode display 100 including an insulating layer formed of a conventional single layer structure includes a substrate 110, a thin film transistor layer 120 disposed on the substrate, and a thin film transistor layer, and functions as an optical cavity layer. Insulating layer 130, a first electrode 140 disposed on the insulating layer, a pixel defining layer 150 separating the first electrode into a light emitting region and a non-emission region, and divided by the pixel defining layer A light emitting layer 160 disposed on the light emitting region of the first electrode and a second electrode 170 disposed on the light emitting layer may be included.

The organic light emitting diode display 100 including the insulating layer formed of the single-layer structure is a rear emission type organic light emitting diode display.

Although not illustrated in FIG. 1, a color filter layer corresponding to the light emitting layer 160 may be disposed between the thin film transistor layer 120 and the insulating layer 130.

2 is a view illustrating a resonance spectrum according to a viewing angle of an organic light emitting diode display including an insulating layer formed of a conventional single layer structure.

Hereinafter, the viewing angle refers to an angle at which a user views the organic light emitting display device. That is, if a viewing angle when a user views the organic light emitting display device from the front is 0 degrees, an angle formed by a line perpendicular to the organic light emitting display device and the user's gaze when the user views the organic light emitting display device from the side Is called the viewing angle. Therefore, a viewing angle of 0 to 90 degrees to the left and right may be present based on the front.

FIG. 2(a) is a view showing a resonance spectrum of the organic light emitting diode display 100 including a conventional optical cavity layer when the viewing angle is 0 degrees, and FIG. 2(b) is a conventional single layer structure when the viewing angle is 50 degrees It is a diagram showing the resonance spectrum of the organic light emitting diode display 100 including the insulating layer formed of.

When comparing (a) and (b) of FIG. 2 based on the blue wavelength (420 to 470 nm), FIG. 2 (a) has a peak value when the blue wavelength is 450 nm, and (b) of FIG. ) Can be seen to have a peak value when the blue wavelength is 425 nm. Since the peak value of the resonance spectrum changes as the viewing angle changes, the amount of color change increases as the viewing angle changes. That is, as the viewing angle is changed, luminance and color shift are generated compared to the front, resulting in a problem that the overall display characteristics are deteriorated.

In order to prevent luminance reduction and color change according to the viewing angle, an exemplary embodiment of the present invention is to provide an organic light emitting display device including an insulating layer formed of a multilayer structure in which an insulating layer serving as the optical cavity layer is formed in a multilayer structure.

3 is a diagram illustrating an organic light emitting display device including an insulating layer formed of a multi-layer structure according to an embodiment of the present invention.

The organic light emitting diode display 200 including an insulating layer formed of a multilayer structure according to an embodiment of the present invention includes a substrate 210, a thin film transistor layer 220 disposed on the substrate, and a thin film transistor layer An insulating layer 230 serving as an optical cavity layer, a first electrode 240 disposed on the insulating layer, and a pixel defining layer 250 separating the first electrode into a light emitting region and a non-light emitting region, the It may include a light emitting layer 260 disposed on the light emitting region of the first electrode separated by a pixel defining layer and a second electrode 270 disposed on the light emitting layer.

The insulating layer 230 may include a first high refractive layer 231, a first low refractive layer 232, and a second high refractive layer 233.

Although not illustrated in FIG. 3, a color filter layer may be disposed between the thin film transistor layer 220 and the insulating layer 230.

The organic light emitting diode display 200 including an insulating layer formed of a multi-layer structure according to an embodiment of the present invention is a back light emitting organic light emitting diode display.

First, a transparent insulating substrate may be used as the substrate 210. For example, the substrate 210 may be formed of a glass substrate, a quartz substrate, a transparent resin substrate, and the like. The transparent resin substrate that can be used as the substrate 210 may include polyimide resin, acrylic resin, polyacrylate resin, polycarbonate resin, polyether resin, polyethylene terephthalate resin, sulfonic acid resin, and the like. These may be used alone or in combination with each other. The substrate 210 may be selected and used according to the needs of those skilled in the art.

A thin film transistor layer 220 electrically connected to the first electrode 240 may be disposed on the substrate 210. Although not illustrated in FIG. 3, a semiconductor device including a gate electrode, a source electrode, and a drain electrode may be formed on the thin film transistor layer 220. The drain electrode may be electrically connected to the first electrode 240. The semiconductor device can be formed by a conventional method of forming a thin film transistor. Therefore, a description of a specific method of forming a semiconductor device or thin film transistor is omitted.

Although not illustrated in FIG. 3, a buffer layer formed of silicon oxide or silicon nitride may be further provided between the substrate 210 and the thin film transistor layer 220 as necessary.

An insulating layer 230 may be disposed on the thin film transistor layer 220. The insulating layer 230 has a thickness capable of sufficiently covering the semiconductor elements constituting the thin film transistor layer 220 formed on the substrate 210.

When the organic light emitting diode display 200 is a rear emission type organic light emitting diode display, the insulating layer 230 is an optical cavity layer because the light generated by the light emitting layer 260 is on an optical path from which light is emitted. It can function as.

The insulating layer 230 may be formed in a single layer structure, but may be formed in a multi-layer structure of at least two or more layers. When the insulating layer 230 is formed in a multi-layer structure, it may include at least one low refractive layer and at least one high refractive layer.

The low refractive layer may be formed of a material having a refractive index of 1.3 or more and less than 1.6, and the high refractive layer may be formed of a material having a refractive index of 1.6 or more and 2.4 or less. The low refractive layer is SiO ₂ (n=1.4~1.5) And MgF ₃ (n=1.3-1.4) It may be formed of at least one of the, the high refractive layer is Si ₃ N ₄ (n = 1.8 ~ 1.9), TiO ₂ (n = 2.0 ~ 2.3), MgO (n = 1.74), Al ₂ O ₃ (n =1.8 to 1.9), SiO (n = 1.8 to 1.9) and ZnS (n = 2.3 to 2.4).

The low refractive layer and the high refractive layer may be alternately formed. In FIG. 3, the first high refractive layer 231, the first low refractive layer 232, and the second high refractive layer 233 are shown in a stacked structure, however, if necessary, the low refractive layer and the high refractive layer are additionally Can be stacked.

The first high refractive layer 231 may be formed to a thickness of 1000Å or more to 6000Å or less, and the first low refractive layer 232 may be formed to a thickness of 1000Å or more to 5000Å or less, and the second high refractive layer 233 may be formed to a thickness of 1000Å or more to 6000Å or less.

Each of the low and high refractive layers constituting the insulating layer 230 is a spin coating process, a printing process, a sputtering process, a chemical vapor deposition (CVD) process, an atomic layer deposition (ALD) process, and plasma augmentation It may be formed using a chemical vapor deposition (PECVD) process, a high density plasma-chemical vapor deposition (HDP-CVD) process, a vacuum deposition process, or the like.

Although not illustrated in FIG. 3, a color filter may be disposed between the thin film transistor layer 220 and the insulating layer 230. The color filter may be a color filter that passes wavelengths in the red region, a color filter that passes wavelengths in the green region, and a color filter that passes wavelengths in the blue region. The type of the color filter may be formed corresponding to the emission color of the light emitting material constituting the light emitting layer 260.

A first electrode 240 may be formed on the insulating layer 230. Since the organic light emitting diode display 200 is a back light emitting organic light emitting diode display, the first electrode 240 may be formed as a transparent electrode. The transparent conductive oxide (TCO) constituting the first electrode 240 may include at least one of indium tin compound, indium zinc oxide, zinc tin oxide, zinc oxide, tin oxide, and gallium oxide. These may be used alone or in combination with each other.

A pixel defining layer 250 is provided between the first electrodes 240. The pixel defining layer 250 is formed of an insulating material, and overlaps an end of the first electrode 240 to divide the first electrode 240 into pixels, thereby dividing the pixel region. define. The pixel defining layer 250 is disposed on the first electrode 240 to distinguish a light emitting region and a non-light emitting region of the organic light emitting diode display 200.

An emission layer 260 may be formed on the emission region of the first electrode 240 divided by the pixel defining layer 250.

The light emitting layer 260 may be formed using light emitting materials capable of generating different color lights, such as red light, green light, and blue light. According to another example, the light emitting layer 260 may have a multi-layer structure in which a plurality of light emitting materials capable of implementing different color lights such as red light, green light, and blue light are stacked to emit white light. According to another example, the emission layer 260 may be formed to extend above the emission region of the first electrode 240 and above the pixel defining layer 250 region.

A second electrode 270 may be formed on the emission layer 260. Since the organic light emitting diode display 200 is a back-emitting organic light emitting diode display, the second electrode 260 may be formed as a reflective electrode. The second electrode 260 is aluminum (Al), platinum (Pt), gold (Au), chromium (Cr), tungsten (T), molybdenum (Mo), titanium (Ti), palladium (Pd) and It may include a material selected from metals and alloys thereof, such as iridium (Ir). These may be used alone or in combination with each other.

The second electrode 270 may be formed only on the emission layer 260, and may be formed to extend above the pixel defining layer 250 and the emission layer 260.

Although not illustrated in FIG. 3, a hole injection layer (HIL) and a hole transport layer (HTL) may be disposed between the first electrode 240 and the light emitting layer 260, and the light emitting layer 260 and the second electrode 270 may be disposed. ), an electron transport layer (ETL) and an electron injection layer (EIL) may be disposed.

4 is a view showing an organic light emitting diode display including an insulating layer formed of a multi-layer structure according to another embodiment of the present invention.

In the case of the organic light emitting display device 300 illustrated in FIG. 4, descriptions of parts overlapping with the organic light emitting display device 200 illustrated in FIG. 3 will be omitted.

The organic light emitting diode display 300 including an insulating layer formed of a multilayer structure according to an embodiment of the present invention includes a substrate 310, a thin film transistor layer 320 disposed on the substrate, and a thin film transistor layer An insulating layer 330 serving as an optical cavity layer, a first electrode 340 disposed on the insulating layer, and a pixel defining layer 350 separating the first electrode into a light emitting region and a non-light emitting region, the A light emitting layer 360 disposed on the light emitting region of the first electrode separated by the pixel defining layer and a second electrode 370 disposed on the light emitting layer may be included.

The insulating layer 330 may include a high refractive layer 331 and a low refractive layer 332.

Although not illustrated in FIG. 4, a color filter layer may be disposed between the thin film transistor layer 320 and the insulating layer 330.

The low refractive layer 332 may be formed of a material having a refractive index of 1.3 or more and less than 1.6, and the high refractive layer 331 may be formed of a material having a refractive index of 1.6 or more and 2.4 or less. The low refractive index layer 332 is SiO ₂ (n=1.4 to 1.5) And MgF ₃ (n=1.3-1.4) It may be formed of at least one of the, the high refractive index layer 331 is Si ₃ N ₄ (n = 1.8 ~ 1.9), TiO ₂ (n = 2.0 ~ 2.3), MgO (n = 1.74), Al ₂ O ₃ (n=1.8 to 1.9), SiO (n=1.8 to 1.9), and ZnS (n=2.3 to 2.4).

The high refractive layer 331 may be formed to a thickness of 3000Å or more to 8000Å or less, and the low refractive layer 332 may be formed to a thickness of 1000Å or more to 6000Å or less.

Hereinafter, a preferred embodiment of the present invention is presented. However, the following examples are only presented to better understand the present invention, and the present invention is not limited to the following examples.

Example

After forming a thin film transistor layer on a transparent substrate, an insulating layer is formed on the thin film transistor layer, and an organic light emitting device is formed on the planarization insulating layer. The insulating layer may include a first high refractive layer, a first low refractive layer, and a second high refractive layer. The first high refractive layer is formed to a thickness of 3400Å using SiN _X , the first low refractive layer is formed to a thickness of 1750Å using SiO ₂ , and the second high refractive layer is formed to a thickness of 1250Å using SiN _X. do.

Comparative example

After forming a thin film transistor layer on a transparent substrate, an insulating layer is formed on the thin film transistor layer, and an organic light emitting device is formed on the planarization insulating layer. The insulating layer is formed to a thickness of 1400Å by using SiO _2.

5 is a view showing a resonance spectrum of an organic light emitting display device (example) including an insulating layer formed of a multilayer structure according to an embodiment of the present invention.

5(a) is a view showing a resonance spectrum of an organic light emitting display device including an insulating layer formed of a multilayer structure according to an embodiment of the present invention when the viewing angle is 0 degrees, and FIG. 5(b) shows a viewing angle 50 is a diagram showing a resonance spectrum of an organic light emitting diode display including an insulating layer formed of a multilayer structure according to an embodiment of the present invention.

In an organic light emitting diode display including an insulating layer formed of a multi-layer structure according to an embodiment of the present invention, since the insulating layer serving as an optical cavity layer is formed in a multi-layer structure, the resonance spectrum has a multi-peak resonance having multiple peak values. It appears as a spectrum.

Since the resonance spectrum of the organic light emitting diode display including the insulating layer formed of the multilayer structure according to the exemplary embodiment of the present invention has a plurality of peak values, the desired wavelength even if the viewing angle is changed by adjusting the thickness of the layers constituting the insulating layer. The peak value of the resonance spectrum can be adjusted within the range.

In addition, since the organic light emitting diode display according to the exemplary embodiment of the present invention includes a color filter layer corresponding to the light emitting layer on the light exit path, an effect due to the resonance spectrum occurring outside a specific wavelength range can be excluded.

When comparing (a) and (b) of FIG. 5 based on the blue wavelength (420 to 470 nm), FIG. 5 (a) has a peak value when the blue wavelength is 450 nm, and (b) of FIG. ) Can be seen to have a peak value when the blue wavelength is 450 nm. Even if the viewing angle changes, the peak value occurs at the same wavelength, so even if the viewing angle changes, the amount of color change is small. That is, even when the viewing angle is changed, since the luminance is reduced and the color shift is small compared to the front, overall excellent display characteristics can be exhibited.

6 is a viewing angle between an organic light emitting display device (example) including an insulating layer formed of a multi-layer structure and an organic light emitting display device (comparative example) including an insulating layer formed of a conventional single-layer structure according to an embodiment of the present invention. It is a diagram comparing the amount of color change according to.

More specifically, FIG. 6A is a diagram showing the amount of blue color change (du'v') on the side of the front contrast as the viewing angle changes, and FIG. 6B is the amount of green color change on the side of the front contrast as the viewing angle changes ( du'v'), and FIG. 6C is a diagram showing the amount of red color change (du'v') on the side of the front side contrast as the viewing angle changes.

The amount of each color change (du'v') is a color coordinate (u'v) when viewed while changing the value of the color coordinate (u'v') and the viewing angle from 0 to 90 degrees when the organic light emitting display is viewed from the front. ') The difference from the value.

The color coordinate (u'v') refers to the coordinates of the 1976 UCS diagram defined in International Lighting Commission CIE 15.2.

The amount of each color change (du'v') can be obtained by directly measuring the color coordinate values of blue, green, and red, respectively, emitted from the organic light emitting display devices of the Examples and Comparative Examples. In addition, in the above Examples and Comparative Examples, it may be measured using an organic light emitting display device in which the light emitting layers are formed only in blue, green, and red, respectively.

6A to 6C, the color change amount (du'v') of one embodiment of the present invention as the viewing angle changes is compared to the color change amount (du'v') of the reference example as the viewing angle changes. It can be seen that it decreases significantly.

That is, it can be seen that an organic light emitting display device including an insulating layer formed of a multi-layer structure as in one embodiment of the present invention reduces color change according to a viewing angle and improves overall display characteristics.

The organic light emitting display device including the insulating layer formed of the multi-layered structure described above is merely exemplary, and the protection scope of the present invention can be variously modified and equalized by those skilled in the art. It can contain.

100, 200, 300: organic light emitting diode display 110, 210, 310: substrate
120, 220, 320: thin film transistor layer 130, 230, 330: insulating layer
231, 331: first high refractive layer 232, 332: first low refractive layer
233: second high refractive layer 140, 240, 340: first electrode
150, 250, 350: pixel definition layer 160, 260, 360: light emitting layer
170, 270, 370: second electrode

Claims (11)

Board;
An insulating layer disposed on the substrate; And
A display element layer disposed on the insulating layer;
Including,
The insulating layer includes at least one low refractive layer and at least one high refractive layer,
The low refractive layer has a refractive index of 1.3 or more and less than 1.6, and the high refractive layer has a refractive index of 1.6 or more and 2.4 or less,
The thickness of the low refractive layer is 1750 Å or more and 6000 Å or less, and the thickness of the high refractive layer is 3,000 층 or more to 8000 Å or less,
The insulating layer represents a multi-peak resonance spectrum having a plurality of peak values, and at least one of the plurality of peak values has an organic light emitting display device having a peak value at the same wavelength when viewed from different viewing angles. The organic light emitting display device of claim 1, wherein a color filter layer is disposed between the substrate and the insulating layer. The method of claim 1, wherein the display element layer,
A first electrode disposed on the insulating layer;
A light emitting layer disposed on the first electrode;
A second electrode disposed on the light emitting layer;
An organic light emitting display device comprising a. The organic light emitting display device of claim 1, wherein the low refractive layer and the high refractive layer are alternately formed. The method of claim 1, wherein the low refractive index is SiO ₂ And MgF ₃ An organic light emitting display device comprising at least one of. The organic light emitting display device of claim 1, wherein the high refractive layer comprises at least one of Si ₃ N ₄ , TiO ₂ , MgO, Al ₂ O ₃ , SiO, and ZnS. The organic light emitting display device of claim 1, wherein a thin film transistor (TFT) layer electrically connected to the first electrode is provided between the substrate and the insulating layer. The organic light emitting display device of claim 7, wherein a color filter layer is provided between the thin film transistor (TFT) layer and the insulating layer. Board;
An insulating layer disposed on the substrate;
A first electrode disposed on the insulating layer;
A light emitting layer disposed on the first electrode; And
A second electrode disposed on the light emitting layer;
Including,
The insulating layer includes at least one low refractive layer and at least one high refractive layer,
The low refractive layer has a refractive index of 1.3 or more and less than 1.6, and the high refractive layer has a refractive index of 1.6 or more and 2.4 or less,
The thickness of the low refractive layer is 1750 1 or more and 6000Å or less, and the thickness of the high refractive layer is 3000Å or more to 8000Å or less,
The insulating layer represents a multi-peak resonant spectrum having a plurality of peak values, and at least one of the plurality of peak values has an organic light emitting display device having a peak value at the same wavelength when viewed from different viewing angles. The organic light emitting display device of claim 9, further comprising a pixel defining layer disposed on the insulating layer and the first electrode and dividing the first electrode into a light emitting region and a non-light emitting region. The organic light emitting display device of claim 9, wherein a color filter layer is disposed between the substrate and the insulating layer.

Images