KR101747328B1

KR101747328B1 - Organic light emitting display device

Info

Publication number: KR101747328B1
Application number: KR1020150169393A
Authority: KR
Inventors: 김종성; 윤종근; 정고은; 권형근
Original assignee: 엘지디스플레이 주식회사
Priority date: 2015-11-30
Filing date: 2015-11-30
Publication date: 2017-06-14
Also published as: KR20170063246A

Abstract

The present invention relates to an organic light emitting display device which is improved in the problem that light is mixed for each pixel or the aperture ratio is lowered. The organic light emitting device includes a first electrode, an organic light emitting layer disposed on the first electrode and emitting light having an ultraviolet wavelength, a second electrode disposed on the organic light emitting layer, and a second electrode disposed below the first electrode, And a reflective layer disposed under the color conversion layer.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an organic light-

BACKGROUND OF THE INVENTION 1. Field of the Invention [0002] The present invention relates to an organic light emitting diode display, and more particularly, to a top emission organic light emitting diode display.

The organic light emitting diode (OLED) is a self-luminous element having low power consumption, high response speed, high luminous efficiency, high brightness and wide viewing angle.

The organic light emitting diode (OLED) is divided into a top emission type and a bottom emission type according to a transmission direction of light emitted through the organic light emitting diode. In the lower light emitting method, since the circuit element is located between the light emitting layer and the image display surface, the aperture ratio is lowered due to the circuit element. On the other hand, in the upper light emitting method, a circuit element is located between the light emitting layer and the image display surface There is an advantage that the aperture ratio is improved.

1 and 2 are schematic cross-sectional views of a conventional OLED display.

1 and 2, a conventional organic light emitting diode display includes a first substrate 1, a thin film transistor layer T including a gate insulating layer, a gate electrode, an interlayer insulating layer, a source electrode, and a drain electrode, And a planarization layer 2 is disposed on the thin film transistor layer T.

The first and second light emitting layers 3 and 4 are disposed on the planarization layer 2 and the banks 5 are disposed between the first and second light emitting layers 3 and 4.

First and second color filters 7 and 8 are disposed on the second substrate 6 and a light shielding layer 9 is disposed on the first and second color filters 7 and 8.

1, a gap between a first substrate 1 and a second substrate 6 is largely adhered. In this case, although the light-shielding layer 9 is provided, , The light may be mixed for each pixel. That is, the light of the first light emitting layer 3 may be incident on the second color filter 8, or the light of the second light emitting layer 4 may be incident on the first color filter 7, thereby degrading the image quality.

The conventional organic light emitting diode display according to FIG. 2 is a case in which the first substrate 1 and the second substrate 6 are stuck together due to a process error. In this case, Lt; / RTI > That is, in the conventional OLED display device, the light-shielding layer 9 overlaps the light-emitting layers 3 and 4, so that the aperture ratio of the organic light-emitting display device may be reduced.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide an organic light emitting display device in which light is mixed for each pixel or an aperture ratio is reduced.

According to an aspect of the present invention, there is provided an organic light emitting display comprising a first electrode, an organic light emitting layer disposed on the first electrode and emitting light having an ultraviolet wavelength, a second electrode disposed on the organic light emitting layer, And a reflective layer disposed under the color conversion layer, the color conversion layer being disposed between the color conversion layer and the light emitting layer and converting the ultraviolet light into light having a wavelength of visible light.

According to the present invention, light converted into red, green, and blue can be emitted upward by the color conversion layer provided below without arranging a color filter on the organic light emitting layer.

Therefore, the organic light emitting display according to an exemplary embodiment of the present invention can prevent problems such as light mixing and drop in aperture ratio due to a laminating process for disposing a color filter on the organic light emitting layer.

In addition, in the organic light emitting diode display according to an exemplary embodiment of the present invention, light of an ultraviolet wavelength emitted to the upper portion of the organic light emitting display device is blocked without passing through the color conversion layer from the organic light emitting layer by the ultraviolet blocking layer, The light emitted from the organic light emitting display device can be prevented from being emitted to the upper portion of the organic light emitting display device.

In addition, the organic light emitting diode display according to an exemplary embodiment of the present invention includes a red color filter for transmitting light in a narrower wavelength range than the red color conversion layer, a green color filter for transmitting light in a wavelength range narrower than the green conversion layer, By including a blue color filter that transmits light in a narrower wavelength range, more vivid red, green, and blue colors can be expressed.

In addition, the organic light emitting display device according to an exemplary embodiment of the present invention can prevent the light converted from red, green, or blue in the color conversion layer from being mixed with each other by disposing the light shielding layer between the plurality of color conversion layers .

In addition, the organic light emitting diode display according to an exemplary embodiment of the present invention may be formed so that the bank 500 includes a light absorbing material. Therefore, the OLED display according to an exemplary embodiment of the present invention can prevent the red, green, or blue light from being mixed with each other in the color conversion layer.

The effects obtained in the present invention are not limited to the effects mentioned above, and other effects not mentioned can be clearly understood by those skilled in the art from the following description .

1 and 2 are schematic cross-sectional views of a conventional OLED display.
3 is a plan view showing an organic light emitting display according to an exemplary embodiment of the present invention.
4 is a schematic cross-sectional view of an OLED display according to a first example of the present invention.
5A to 5C are graphs showing wavelengths of organic light emitting display devices according to an example of the present invention.
6 is a schematic cross-sectional view of an OLED display according to a second example of the present invention.
7 is a schematic cross-sectional view of an OLED display according to a third example of the present invention.
8 is a schematic cross-sectional view of an OLED display according to a fourth example of the present invention.
9 is a schematic cross-sectional view of an OLED display according to a fifth example of the present invention.

The meaning of the terms described herein should be understood as follows.

The word " first, "" second," and the like, used to distinguish one element from another, are to be understood to include plural representations unless the context clearly dictates otherwise. The scope of the right should not be limited by these terms. It should be understood that the terms "comprises" or "having" does not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof. It should be understood that the term "at least one" includes all possible combinations from one or more related items. For example, the meaning of "at least one of the first item, the second item and the third item" means not only the first item, the second item or the third item, but also the second item and the second item among the first item, Means any combination of items that can be presented from more than one. The term "on" means not only when a configuration is formed directly on top of another configuration, but also when a third configuration is interposed between these configurations.

Hereinafter, preferred embodiments of the organic light emitting display according to the present invention will be described in detail with reference to the accompanying drawings. In the drawings, like reference numerals are used to denote like elements throughout the drawings, even if they are shown on different drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

3 is a plan view showing an organic light emitting display according to an exemplary embodiment of the present invention.

3, the OLED display includes a display panel 10, a gate driver 20, an integrated circuit (IC) 30, a flexible film (40), a circuit board (50), and a timing controller (60).

The display panel 10 includes a display area DA. In the display area DA, pixels arranged in the intersecting regions of the gate lines, the data lines, the gate lines and the data lines are formed. At this time, the pixels of the display area DA can display an image.

The gate driver 20 supplies gate signals to the gate lines according to a gate control signal input from the timing controller 60.

The source driver IC 30 receives the digital video data and the source control signal from the timing controller 60. This source drive IC 30 converts the digital video data into analog data voltages according to the source control signal and supplies them to the data lines. At this time, when the source drive IC 30 is manufactured as a driving chip, it can be mounted on the flexible film 40 by a COF (chip on film) or a COP (chip on plastic) method.

Wires connecting the pads to the source drive IC 30 and wirings connecting the pads to the wirings of the circuit board 50 may be formed on the flexible film 40. At this time, the flexible film 40 is attached on the pads using an anisotropic conducting film, whereby the pads and the wirings of the flexible film 40 can be connected.

The circuit board 50 may be attached to the flexible films 40. The circuit board 50 may be implemented with a plurality of circuits implemented with driving chips. For example, the timing control section 60 may be mounted on the circuit board 50. At this time, the circuit board 50 may be a printed circuit board or a flexible printed circuit board.

The timing controller 60 receives digital video data and a timing signal from an external system board (not shown). The timing control unit 60 generates a gate control signal for controlling the operation timing of the gate driving unit 20 and a source control signal for controlling the source drive ICs 30 based on the timing signal. In addition, the timing controller 60 supplies the gate control signal to the gate driver 20 and the source control IC 30 to the source driver ICs 30.

4 is a schematic cross-sectional view of an OLED display according to a first example of the present invention.

4, the organic light emitting display according to the first embodiment of the present invention includes a substrate 100, a thin film transistor T, a passivation layer 200, a planarization layer 250, a reflective layer 300, The organic light emitting layer 550 includes a first electrode 450 and a second electrode 450. The organic light emitting layer 550 includes a first electrode 450 and a second electrode 600. The organic light emitting layer 550 includes a sealing layer 650 and an ultraviolet blocking layer 700.

The thin film transistor T includes an active layer 110, a gate insulating layer 120, a gate electrode 130, an interlayer insulating layer 140, a source electrode 150 and a drain electrode 160.

The active layer 110 is disposed on the substrate 100 so as to overlap with the gate electrode 130. The active layer 110 may be formed of a silicon based semiconductor material or an oxide based semiconductor material. Although not shown, a light shielding film may be additionally formed between the substrate 100 and the active layer 110.

The gate insulating layer 120 is disposed on the active layer 110. The gate insulating layer 120 insulates the active layer 110 from the gate electrode 130. At this time, the gate insulating layer 120 may be formed of an inorganic insulating material such as a silicon oxide layer (SiOx), a silicon nitride layer (SiNX), or a multilayer thereof, but the present invention is not limited thereto.

The gate electrode 130 is disposed on the gate insulating layer 120. At this time, the gate electrode 130 is formed to overlap the active layer 110 with the gate insulating layer 120 interposed therebetween. The gate electrode 130 may be formed of any one selected from the group consisting of Mo, Al, Cr, Au, Ti, Ni, Ne, And may be a single layer or multiple layers made of these alloys, but it is not necessarily limited thereto.

The interlayer insulating layer 140 is formed on the gate electrode 130. The interlayer insulating layer 140 may be formed of the same inorganic insulating material as the gate insulating layer 120, for example, a silicon oxide layer (SiOX), a silicon nitride layer (SiNX), or a multilayer thereof. However, It is not.

The source electrode 150 and the drain electrode 160 are disposed to face each other on the interlayer insulating layer 140. The gate insulating film 120 and the interlayer insulating film 140 are formed with a first contact hole CH1 exposing one end region of the active layer 110 and a second contact hole CH1 exposing the other end region of the active layer 110 CH2). The source electrode 150 is connected to the other end of the active layer 110 through the first contact hole CH1 and the drain electrode 160 is connected to the active layer 110 through the second contact hole CH2. Lt; / RTI >

The structure of the thin film transistor layer T as described above is not limited to the structure shown in the drawings, but may be variously modified in a structure known to those skilled in the art. For example, although the top gate structure in which the gate electrode 130 is formed on the active layer 110 is shown in the drawing, the gate electrode 130 may be formed on the bottom layer of the active layer 110, Or a bottom gate structure.

The passivation layer 200 is disposed on the thin film transistor layer T. The passivation layer 200 serves to protect the thin film transistor layer T. At this time, the passivation layer 200 may be formed of an inorganic insulating material, for example, a silicon oxide film (SiOX) or a silicon nitride film (SiNX), but the present invention is not limited thereto.

The planarization layer 250 is disposed on the passivation layer 200. The planarization layer 250 functions to flatten the upper surface of the substrate 100 on which the thin film transistor T is provided. The planarization layer 250 may be formed of an organic insulating material such as an acryl resin, an epoxy resin, a phenolic resin, a polyamide resin, or a polyimide resin. But it is not necessarily limited thereto.

The reflective layer 300 is disposed on the planarization layer 250 and is disposed below the color conversion layer 400 to be described later. The reflective layer 300 may be formed of a material having a high reflection efficiency, and reflects light emitted to the bottom of the organic light emitting layer 550, which will be described later, to an upper portion of the OLED display.

The color conversion layer 400 is disposed on the reflective layer 300 and is disposed below the first electrode 450, which will be described later. The color conversion layer 400 converts ultraviolet light into visible light. In this way, the light converted into light having a wavelength of visible light by the color conversion layer 400 is reflected to the upper portion of the organic light emitting display device by the reflective layer 300 disposed thereunder. At this time, the color conversion layer 400 may have a red conversion layer R, a green conversion layer G, or a blue conversion layer B. The red conversion layer R converts ultraviolet light into red wavelength light. The green conversion layer G converts ultraviolet light into green light. The blue conversion layer B converts Converts ultraviolet light into blue light. Accordingly, the OLED display according to the first embodiment of the present invention can convert light emitted from the organic light emitting layer 550 into red, green, and blue without a color filter. In the organic light emitting diode display according to the first embodiment of the present invention, since light emitted from the organic light emitting layer 550 is changed in color by the color conversion layer 400 disposed under the organic light emitting layer 550, A color filter is disposed on the organic light emitting layer 550 as shown in FIG. 4B, so that light of different colors is mixed according to a gap between the substrates. In addition, since the OLED display according to the first embodiment of the present invention does not require a laminating process for disposing a color filter on a substrate as in the related art, it is difficult to mix light of different colors or decrease the aperture ratio .

The first electrode 450 is disposed on the color conversion layer 400. The third contact hole CH3 exposing the drain electrode 160 is formed in the passivation layer 200, the planarization layer 250, the reflective layer 300, and the color conversion layer 400. The third contact hole CH3 exposes the first electrode 450 are connected to the drain electrode 160 through the third contact hole CH3. That is, the first electrode 450 is electrically connected to the thin film transistor T. In this case, the first electrode 450 may be disposed separately for each pixel, and may function as an anode electrode, for example. The first electrode 450 may be made of indium-tin-oxide (ITO) or indium-zinc-oxide (IZO).

The bank 500 is disposed on the first electrode 450. At this time, the bank 500 is arranged to overlap with a part of the first electrode 450, thereby partitioning the first electrode 450. That is, the bank 500 is disposed to cover the side surface of the first electrode 450 while exposing the top surface of the first electrode 450. The bank 500 is disposed so as to expose the upper surface of the first electrode 450, thereby securing an area where an image is displayed. The bank 500 may be formed of an organic insulating material such as polyimide resin, acryl resin, benzocyclobutene (BCB) or the like, but is not limited thereto.

The organic light emitting layer 550 is disposed on the first electrode 450. The organic light emitting layer 550 emits ultraviolet light at the upper and lower sides. At this time, ultraviolet light having a wavelength of ultraviolet light emitted from above is blocked by the ultraviolet blocking layer 650 described later. The light of the ultraviolet wavelength emitted to the bottom is incident on the color conversion layer 400. Light having a wavelength of ultraviolet light incident on the color conversion layer 400 is converted into light having a wavelength of visible light by the color conversion layer 400 and is reflected to the upper portion of the organic light emitting display device by the reflection layer 300. Accordingly, light emitted above the organic light emitting layer 550 without passing through the color conversion layer 400 is not emitted to the upper portion of the organic light emitting display device, and only light emitted to the lower portion of the organic light emitting layer 550 is converted into the color conversion layer 400 to the top of the organic light emitting display device by the reflective layer 300. Accordingly, the organic light emitting diode display according to the first example of the present invention can emit light converted into red, green, and blue colors upward without disposing a color filter on the organic light emitting layer 550. Therefore, the organic light emitting display according to the first embodiment of the present invention can prevent problems such as light mixing and lowering of the aperture ratio by the adhesion process for disposing the color filter on the organic light emitting layer 550.

The second electrode 600 is disposed on the organic light emitting layer 550. In this case, the second electrode 450 may function as a cathode electrode when the first electrode 450 functions as an anode electrode. The second electrode 450 is formed of a transparent conductive material because the second electrode 450 is formed on the light-emitting surface.

The sealing layer 650 may be disposed entirely on the second electrode 600 to prevent moisture from penetrating into the organic light emitting display device. As the sealing layer 650, various materials known in the art can be used.

The ultraviolet blocking layer 700 is disposed on the second electrode 600 and the sealing layer 650. The ultraviolet blocking layer 700 blocks ultraviolet light emitted from the organic light emitting layer 550. As described above, in the organic light emitting display according to the first embodiment of the present invention, the ultraviolet blocking layer 700 emits light from the organic light emitting layer 550 to the upper portion of the OLED display without passing through the color conversion layer 400 The light of the ultraviolet wavelength is blocked, and therefore, the problem that the light whose color is not converted is emitted to the upper portion of the organic light emitting display device can be prevented.

In addition, the OLED display according to the first embodiment of the present invention can emit red, green, and blue light upward without arranging a color filter on the organic light emitting layer 550. Therefore, the organic light emitting display according to the first embodiment of the present invention can prevent problems such as light mixing and lowering of the aperture ratio by the adhesion process for disposing the color filter on the organic light emitting layer 550.

5A to 5C are graphs showing wavelengths of organic light emitting display devices according to an example of the present invention.

FIG. 5A is a graph illustrating a wavelength according to light emitted from the organic light emitting layer 550 of the OLED display according to an exemplary embodiment of the present invention. Referring to FIG. Referring to FIG. 5A, the organic light emitting layer 550 according to an exemplary embodiment of the present invention emits light having an ultraviolet wavelength corresponding to a short wavelength between about 300 nanometers (nm) and 400 nanometers.

FIG. 5B is a graph illustrating a wavelength according to light emitted from the color conversion layer 400 of the OLED display according to an exemplary embodiment of the present invention. Referring to FIG. Referring to FIG. 5B, the color conversion layer 400 according to an exemplary embodiment of the present invention absorbs ultraviolet light having a wavelength of about 300 nanometers (nm) to 400 nanometers. The color conversion layer 400 includes a red conversion layer R, a green conversion layer G or a blue conversion layer B. In the case of the red conversion layer R, Lt; / RTI > to 700 nanometers. In the case of the green conversion layer G, light of a visible light wavelength between about 500 nanometers (nm) and 600 nanometers is emitted, and in the case of the blue conversion layer B, light of about 400 nanometers (nm) It emits light with a wavelength of visible light between 500 nanometers. That is, the color conversion layer 400 absorbs ultraviolet light having a short wavelength and converts it into light having a wavelength of visible light having a long wavelength.

5C is a graph showing the wavelengths transmitted through the ultraviolet blocking layer 700 of the organic light emitting diode display according to an exemplary embodiment of the present invention. Referring to FIG. 5C, an ultraviolet blocking layer 700 according to an exemplary embodiment of the present invention blocks ultraviolet light having a wavelength of about 300 nanometers (nm) to 400 nanometers, and a visible light having a wavelength of about 400 nanometers (nm) And transmits light of a wavelength of light.

The organic light emitting display according to an exemplary embodiment of the present invention emits ultraviolet light in the organic light emitting layer 550 and the ultraviolet light emitted from the organic light emitting layer 550 is emitted to the color conversion layer 400 The light is converted into light having a wavelength of visible light and reflected to the upper portion of the organic light emitting display device. Therefore, the organic light emitting display according to an exemplary embodiment of the present invention can emit light converted into red, green, and blue by the color conversion layer 400 provided below, without arranging a color filter on the organic light emitting layer 550 To the upper part. Therefore, the organic light emitting display according to an exemplary embodiment of the present invention can prevent problems such as light mixing and lowering of the aperture ratio due to the adhesion process for disposing the color filter on the organic light emitting layer 550.

In addition, the organic light emitting diode display according to an exemplary embodiment of the present invention may be configured to emit light of a wavelength of ultraviolet light emitted from the organic light emitting layer 550 to the upper portion of the organic light emitting display device without passing through the color conversion layer 400 The light is blocked, and therefore, the problem that the untransmitted light is emitted to the upper portion of the organic light emitting display device can be prevented.

6 and 7 are schematic cross-sectional views of the organic light emitting diode display according to the second and third embodiments of the present invention except for the color filter in the OLED display according to the first example shown in FIG. 4 . Accordingly, only the color filter will be described in the following description, and redundant description of the same configuration will be omitted.

The color filter 350 is arranged to overlap with the color conversion layer 400. 6, a color filter 350 is disposed under the color conversion layer 400 and the color conversion layer 400 and the reflective layer 300 . 7, a color filter 350 is disposed on the color conversion layer 400, and the color conversion layer 400 and the first electrode 450 are disposed on the color conversion layer 400. In the organic light emitting display according to the third exemplary embodiment, Respectively.

At this time, the color filter 350 includes a red color filter overlapping with the red conversion layer R, a green color filter overlapping with the green conversion layer G, and a blue color filter overlapping with the blue conversion layer B . These red, green, and blue color filters 350 are disposed above or below the color conversion layer 400. The red color filter transmits light in a wavelength range narrower than that of the red conversion layer R and the green color filter transmits light in a narrower wavelength range than the green conversion layer G, It is possible to transmit light in a narrower wavelength range. Thus, when embodiments of the present invention include red, green, and blue color filters 350, more vivid red, green, and blue colors can be represented.

Since the color filter 350 is not disposed on the organic light emitting layer 550, problems such as light mixing and drop in aperture ratio due to a laminating process for disposing the color filter 350 on the organic light emitting layer 550 Can be prevented.

FIG. 8 is a schematic cross-sectional view of an OLED display according to a fourth example of the present invention, which is the same as the OLED display according to the first example shown in FIG. 4 except for the light shielding layer. Accordingly, only the light shielding layer will be described in the following description, and redundant description of the same constitution will be omitted.

The light shielding layer 370 is disposed between the color conversion layer 400 and another color conversion layer 400 adjacent to the color conversion layer 400. Accordingly, in the organic light emitting diode display according to the fourth example of the present invention, the light-shielding layer 370 is disposed between the plurality of color conversion layers 400 to convert the color conversion layer 400 into red, green, or blue It is possible to prevent the mixed light from mixing with each other. At this time, the light shielding layer 370 may be disposed under the bank 500. Accordingly, the OLED display according to the fourth exemplary embodiment of the present invention includes the light shielding layer 370 to prevent mixing of light of different colors, and the aperture ratio of the organic light emitting display device is not reduced.

FIG. 9 is a schematic cross-sectional view of an OLED display according to a fifth example of the present invention, which is the same as the OLED display according to the fourth example shown in FIG. 8 except for banks. Accordingly, only the bank will be described in the following description, and redundant description of the same configuration will be omitted.

The bank 500 may be disposed to partition the first electrode 450 and may be disposed on the upper portion of the light shielding layer 370. In this case, the bank 500 of the organic light emitting diode display according to the fifth embodiment of the present invention includes a light absorbing material, for example, a black bank. Therefore, the organic light emitting display according to the fifth example of the present invention includes the bank 500 that absorbs light, so that light converted into red, green, or blue in the color conversion layer 400 is mixed with each other Can be prevented.

Although the embodiments of the present invention have been described in detail with reference to the accompanying drawings, it is to be understood that the present invention is not limited to those embodiments and various changes and modifications may be made without departing from the scope of the present invention. . Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. Therefore, it should be understood that the above-described embodiments are illustrative in all aspects and not restrictive. The scope of protection of the present invention should be construed according to the claims, and all technical ideas within the scope of equivalents should be interpreted as being included in the scope of the present invention.

T: thin film transistor 200: passivation layer
250: planarization layer 300: reflective layer
350: Color filter 400: Color conversion layer
450: first electrode 500: bank
550: organic light emitting layer 600: second electrode
650: sealing layer 700: ultraviolet blocking layer

Claims

A first electrode;
An organic light emitting layer disposed on the first electrode and emitting light having an ultraviolet wavelength;
A second electrode disposed on the organic light emitting layer;
A color conversion layer disposed under the first electrode and converting the ultraviolet light into visible light; And
And a reflective layer disposed below the color conversion layer.

The method according to claim 1,
Wherein the color conversion layer is a red conversion layer, a green conversion layer, or a blue conversion layer.

3. The method of claim 2,
Wherein the red conversion layer converts light of the ultraviolet wavelength into light of a red wavelength,
Wherein the green conversion layer converts light of the ultraviolet wavelength into light of a green wavelength,
And the blue conversion layer converts the light having the ultraviolet wavelength into the light having the blue wavelength.

The method of claim 3,
And a color filter disposed between the color conversion layer and the reflective layer.

The method of claim 3,
And a color filter disposed between the color conversion layer and the first electrode.

The method according to claim 4 or 5,
The color filter includes:
A red color filter superimposed on the red conversion layer;
A green color filter overlapping the green conversion layer; And
And a blue color filter superimposed on the blue conversion layer.

The method according to claim 1,
Further comprising an ultraviolet blocking layer for blocking light having the ultraviolet wavelength,
And the ultraviolet blocking layer is disposed on the second electrode.

The method according to claim 1,
Further comprising a light shielding layer disposed between the color conversion layer and another color conversion layer adjacent to the color conversion layer.

9. The method of claim 8,
Further comprising a bank for partitioning the first electrode,
And the light-shielding layer is disposed under the bank.

10. The method of claim 9,
Wherein the bank comprises a material that absorbs light.

The method according to claim 1,
Wherein the color conversion layer absorbs ultraviolet light having a wavelength of 300 to 400 nanometers.

8. The method of claim 7,
Wherein the ultraviolet blocking layer blocks ultraviolet light having a wavelength of 300 to 400 nanometers and transmits light having a wavelength of visible light of 400 nanometers or more.