KR102649418B1 - Organic light emitting display device and manufacturing method thereof - Google Patents

Abstract

The present embodiments relate to an organic light emitting display device and a method of manufacturing the same, wherein the organic light emitting display device includes a substrate divided into a display area and a non-display area, and an array layer including a plurality of thin film transtors disposed on the display area of the substrate. , a light emitting layer disposed on the array layer, an encap layer that encapsulates the light emitting layer, and a color layer disposed inside the encap layer, wherein the encap layer is a first encap layer disposed on the light emitting layer, and a second encap layer disposed on the color layer. It includes two encap layers, and the color layer is disposed between the first encap layer and the second encap layer, so that the thickness can be slim and color mixing can be prevented.

Description

Organic light emitting display device and manufacturing method thereof {ORGANIC LIGHT EMITTING DISPLAY DEVICE AND MANUFACTURING METHOD THEREOF}

The present invention relates to an organic light emitting display device and a method of manufacturing the same.

As the information society develops, the demand for display devices for displaying images is increasing in various forms, and in recent years, liquid crystal displays (LCDs), plasma displays (PDPs: plasma display panels), and organic light emitting devices are increasing. Various display devices such as OLED (Organic Light Emitting Display Device, or organic electroluminescent display device) are being used. These various display devices include display panels corresponding to them.

The display panel has thin film transistors formed in each pixel area, and a specific pixel area within the display panel is controlled through the flow of current in the thin film transistor. A thin film transistor consists of a gate and source/drain electrodes.

In an organic light emitting display device, a light emitting layer is formed between two different electrodes. When electrons generated from one electrode and holes generated from the other electrode are injected into the light emitting layer, the injected electrons and holes combine to produce an exciton. ) is generated, and the generated axiton falls from the excited state to the ground state and emits light to display an image.

The organic light emitting display device described above includes a plurality of circuits to control each organic light emitting layer that emits light of each color, so the process is complicated and the manufacturing process may be difficult.

Accordingly, an organic light-emitting layer that emits white color is formed on the organic light-emitting layer, an encapsulation layer that protects the organic light-emitting layer is placed on the organic light-emitting layer, and a color filter is placed on the encapsulation layer to facilitate the construction of the circuit and the manufacturing process. This could be simplified.

However, there was a problem in that the thickness of the organic light emitting display device became thick by disposing the encapsulation layer and the color filter layer on the organic light emitting layer.

In addition, the color filter layer has a problem of becoming thicker by arranging the color filters to overlap or by arranging a black matrix to prevent color mixing between the color filters.

Therefore, there is a need for technology that can prevent color mixing while reducing the thickness of organic light emitting display devices that use color filters.

The problem to be solved by the present invention is to provide an organic light emitting display device whose thickness is slim by disposing the color layer inside the encap layer.

Another problem to be solved by the present invention is to provide an organic light emitting display device in which color mixing is prevented by disposing the color layer inside the encap layer.

Another problem that the present invention aims to solve is to provide a method of manufacturing an organic light emitting display device that has a slim thickness and prevents color mixing.

The problems of the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art from the description below.

An organic light emitting display device according to an embodiment of the present invention for achieving the above object includes a substrate divided into a display area and a non-display area, an array layer including a plurality of thin film transtors disposed on the display area of the substrate, It includes a light emitting layer disposed on the array layer, an encapsulating layer encapsulating the light emitting layer, and a color layer disposed inside the encap layer, wherein the encap layer includes a first encap layer disposed on the light emitting layer, and the color layer. and a second encap layer disposed on the color layer, and the color layer is disposed between the first encap layer and the second encap layer.

Here, the first encapsulation layer encapsulating the light emitting layer is disposed in the display area, the second encapsulation layer encapsulating the color layer is disposed, and the non-display area is disposed on both sides of the color layer. The first encapsulating layer and the second encapsulating layer may be placed in contact with each other.

For example, the color layer may have a plurality of color regions having different energy band gaps arranged on the same layer made of the same material.

Here, the color layer includes a first color region having a first energy band gap, a second color region having a second energy band gap, and a third color region having a third energy band gap, wherein the first color region The energy bandgap, the second energy bandgap and the third energy bandgap may be different energy bandgaps.

Meanwhile, the light emitting layer may emit white color.

A method of manufacturing a display device according to another embodiment of the present invention for achieving the above problem includes forming an array layer including thin film transistors on a substrate, forming a light-emitting layer on the array layer, and forming a light-emitting layer on the light-emitting layer. Forming a first encap layer, forming a core-shell layer on the first encap layer, providing energy for each region to the core-shell layer to form a color layer having a plurality of color regions, and the color layer It includes forming a second encap layer on the.

Here, in the step of forming the light-emitting layer on the array layer, the light-emitting layer may emit white color.

In addition, the step of forming a first encap layer on the light-emitting layer may be a step of covering the entire surface of the substrate including the light-emitting layer with an inorganic material.

And, in the step of providing energy to the core-shell layer for each region to form a color layer having a plurality of color regions, the energy provided to the core-shell layer is any one of heat energy, UV energy, and a mixture of these. It could be one.

In addition, in the step of providing energy to the core-shell layer for each region to form a color layer having a plurality of color regions, the provided energy is different from each other by controlling the energy intensity and energy provision time differently. This may be a step of forming a color region with a band gap.

And, in the step of providing energy to the core-shell layer for each region to form a color layer having a plurality of color regions, a first color region having a first energy band gap is disposed in a region different from the first color region. This may be a step of forming a second color area having a second energy band gap, a third color area disposed in a different area from the second color area, and having a third energy band gap.

For example, in forming a second encap layer on the color layer, the second encap layer may be formed of the same material as the first encap layer.

The method may further include forming a protective cover on the second encap layer.

Specific details of other embodiments are included in the detailed description and drawings.

According to embodiments of the present invention, there are at least the following effects.

According to embodiments of the present invention, the organic light emitting display device has a slim thickness and is effective in preventing color mixing by disposing the color layer inside the encap layer.

According to embodiments of the present invention, the organic light emitting display device arranges the color layer inside the encap layer, so that a plurality of color areas are formed on the same layer where the color layer is made of the same material, thereby replacing the planarization layer. There is.

The effects according to the present invention are not limited to the contents exemplified above, and further various effects are included in the present specification.

1 is a plan view schematically showing an organic light emitting display device according to an embodiment of the present invention.
Figure 2 is a cross-sectional view showing a light emitting layer and an array layer of an organic light emitting display device according to an embodiment of the present invention.
Figure 3 is a cross-sectional view showing an encap layer disposed on an organic light-emitting layer according to an embodiment of the present invention.
Figure 3 is a cross-sectional view showing an encap layer and a color layer disposed on the light emitting layer of an organic light emitting display device according to an embodiment of the present invention.
Figures 4a to 4c are schematic diagrams showing the material of the color layer according to an embodiment of the present invention.
Figure 5 is a graph showing the transmission wavelength of the color layer according to an embodiment of the present invention.
6 to 17 are diagrams showing the manufacturing process of an organic light emitting display device according to an embodiment of the present invention.

Hereinafter, some embodiments of the present invention will be described in detail with reference to the exemplary drawings. In adding reference numerals to components in each drawing, identical components may have the same reference numerals as much as possible even if they are shown in different drawings. Additionally, when describing the present invention, if it is determined that a detailed description of a related known configuration or function may obscure the gist of the present invention, the detailed description may be omitted.

Additionally, when describing the components of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are only used to distinguish the component from other components, and the essence, sequence, order, or number of the components are not limited by the term. When a component is described as being “connected,” “coupled,” or “connected” to another component, that component may be directly connected or connected to that other component, but there are no other components between each component. It should be understood that may be “interposed” or that each component may be “connected,” “combined,” or “connected” through other components.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

1 is a plan view schematically showing an organic light emitting display device according to an embodiment of the present invention.

Referring to FIG. 1, the organic light emitting display device 100 according to an embodiment of the present invention has a plurality of first lines VL1 to VLm formed in a first direction (e.g., vertical direction) and a plurality of first lines VL1 to VLm in a second direction. A display panel 110 in which a plurality of second lines (HL1 to HLn) are formed in a horizontal direction (e.g., a horizontal direction), and a first driver 120 that supplies a first signal to a plurality of first lines (VL1 to VLm). , a second driver 130 that supplies a second signal to a plurality of second lines (HL1 to HLn), and a timing controller 140 that controls the first driver 120 and the second driver 130. Includes.

The display panel 110 includes a plurality of first lines (VL1 to VLm) formed in a first direction (e.g., vertical direction) and a plurality of second lines (HL1 to HLn) formed in a second direction (e.g., horizontal direction). Multiple pixels (P: Pixel) are defined according to the intersection of .

The area where the above-described plurality of pixels (P) are arranged is defined as the display area (A/A). And the non-display area (N/A) is defined as an area where the second lines (HL1 to HLn) and the first lines (VL1 to VLm) extend along the border of the display area (A/A). The non-display area N/A may be arranged along the border of the display area A/A, but is not limited to this and may be arranged along at least one side of the display area A/A.

Specifically, in order to receive signals provided from the first driver 120 and the second driver 130, the second lines (HL1 to HLn) and the first lines (VL1 to VLm) are arranged up to the non-display area (N/A). It can be.

Each of the above-described first driver 120 and second driver 130 may include at least one driver integrated circuit (Driver IC) that outputs a signal for image display.

For example, the plurality of first lines (VL1 to VLm) formed in the first direction on the display panel 110 are formed in the vertical direction (first direction) and transmit data voltage (first signal) to the pixel column in the vertical direction. It may be a data line that supplies data voltage to the data line, and the first driver 120 may be a data driver that supplies a data voltage to the data line.

In addition, the plurality of second lines (HL1 to HLn) formed in the second direction on the display panel 110 are formed in the horizontal direction (second direction) and are gates that transmit a scan signal (first signal) to the pixel column in the horizontal direction. It may be a wiring, and the second driver 130 may be a gate driver that supplies a scan signal to the gate wiring.

Additionally, a pad portion is formed in the non-display area (N/A) of the display panel 110 to connect the first driver 120 and the second driver 130. When the first signal is supplied from the first driver 120 to the plurality of first lines (VL1 to VLm), the pad unit transmits it to the display panel 110, and similarly, the second driver 130 transmits the first signal to the plurality of second lines (VL1 to VLm). When the second signal is supplied to HL1 to HLn), it is transmitted to the display panel 110.

Each pixel includes one or more subpixels. A subpixel refers to a unit in which a specific type of color filter is formed or in which an organic light emitting device can emit a special color without forming a color filter. Colors defined in subpixels may include red (R), green (G), blue (B), and white (W), or may include only white, but the present invention is not limited thereto. Since each subpixel includes a separate thin film transistor and an electrode connected thereto, hereinafter, the subpixels constituting the pixel are also referred to as one pixel area. A first line may be arranged for each subpixel, and multiple subpixels constituting a pixel may share a specific first line. The configuration of the pixel/subpixel and the first line/second line may be implemented in various ways, and the present invention is not limited thereto.

The electrode connected to the thin film transistor that controls the light emission of each pixel area of the display panel 110 is called the first electrode, and the electrode disposed on the front of the display panel 110 or arranged to include two or more pixel areas is called the second electrode. It is called an electrode. When the first electrode is an anode electrode, the second electrode becomes a cathode electrode, and vice versa. Hereinafter, the anode electrode will be described as an example of the first electrode, and the cathode electrode will be described as an example of the second electrode, but the present invention is not limited thereto.

A color filter of a single color may be disposed in an area corresponding to the above-described subpixel area. A color filter can convert the color of a single organic light-emitting layer into a color of a specific wavelength.

Figure 2 is a cross-sectional view showing a light emitting layer and an array layer of an organic light emitting display device according to an embodiment of the present invention.

The organic light emitting display device 100 includes an array layer 200 in which thin film transistors are aligned and a light emitting layer 300 disposed on the array layer 200.

First, the array layer 200 has a buffer 202 located on the substrate 201, and an active 205, a gate insulator 207, a gate 210, and an interlayer insulator 215 are formed on the buffer. ), source and drain 220, passivation layer 225, first planarization layer 227, and connection electrode 230 connected to source or drain 220, second planarization layer 235 ), the source or drain 220 and the active 205 are connected through a contact hole 218 formed in the first electrode or, in one embodiment, the anode 240 or the interlayer insulating film 215.

And the light-emitting layer 300 includes an anode (240), an organic light-emitting layer (270), and a cathode (280). Specifically, the light emitting layer 300 includes an anode 240 connected to the thin film transistor, an organic light emitting layer 270 disposed on the anode 240, and a cathode 280 disposed on the organic light emitting layer 270. It can be. Here, the cathode 280 may be formed of a transparent electrode material.

Here, the connection electrode 230 is selectively disposed, and if there is no connection electrode 230, the anode 240 can be directly connected to the source or drain 220.

Banks 250 that divide the light-emitting layer may be disposed between the light-emitting layers 300 . The bank 250 may partition subpixels or pixels. When the light emitting layer 300 emits different colors, the bank 250 may be arranged to divide each color of a subpixel.

Alternatively, when the light-emitting layer 300 emits the same color, the bank 250 may be arranged to partition the plurality of subpixels in consideration of the light-emitting efficiency of the light-emitting layer 300.

FIG. 3 is a cross-sectional view showing an encap layer and a color layer disposed on the light emitting layer of an organic light emitting display device according to an embodiment of the present invention, and FIGS. 4A to 4C show materials of the color layer according to an embodiment of the present invention. It is a schematic diagram showing, and Figure 5 is a graph showing the transmission wavelength of the color layer according to an embodiment of the present invention.

Referring to FIG. 3, the organic light emitting display device 100 according to an embodiment of the present invention includes an array layer 200 in which a plurality of thin film transistors are disposed on a substrate 201, and an array layer 200 disposed on the array layer 200. A light-emitting layer 300, an encapsulating layer 310 that encapsulates the light-emitting layer 300, a color layer 350 disposed inside the encapsulating layer 310, and a protective cover 390 disposed on the encapsulating layer 310. Includes.

A color layer 350 may be disposed inside the encap layer 310. Specifically, the encap layer 310 includes a first encap layer 312 disposed on the light emitting layer 300 and a second encap layer 314 disposed on the color layer 350. That is, the color layer 350 is disposed between the first encap layer 312 and the second encap layer 314.

Specifically, the encap layer 310 is disposed on the upper and lower surfaces of the color layer 350 on the display area (A/A), and the first encap layer 312 and the second encap layer 312 on the non-display area (N/A). 2 The encap layer 314 is placed in contact with the color layer 350 to encapsulate it. Conventionally, inorganic films were formed on the encap layer with an organic film in between, and a color filter was formed on the encap layer, so that the thickness of the organic light emitting display device became thick due to the thickness of the encap layer and the color filter.

However, in the encap layer 310 according to an embodiment of the present invention, the thickness of the organic light emitting display device 100 can be slimmed by disposing the color layer 350 in the area where the organic layer is formed.

The color layer 350 may have a plurality of color regions capable of transmitting light of a specific wavelength disposed on the same layer made of the same material. In other words, the color layer 350 can function as a color filter. And, the light emitting layer 300 can emit white color. Therefore, the white color emitted from the light emitting layer 300 can transmit only colors of a specific wavelength while passing through the color layer 350.

Conventionally, to form a color filter, color mixing was prevented by arranging the ends of the color filters to overlap each other or by arranging a black matrix at the end of the color filter, that is, in the border area. Accordingly, the thickness of the color filter may become thicker, and a height difference may occur due to the overlapping area, thereby reducing flatness.

However, in the organic light emitting display device 100 according to the present embodiment, the color layer 350 is disposed inside the encap layer 310, so that the color layer 350 is formed of the same material and has a plurality of color regions on the same layer. As this is formed, it can replace the planarization layer.

Meanwhile, the color layer 350 may include a plurality of color regions 350R, 350G, and 350B having different energy band gaps on the same layer formed of the same material.

The color layer 350 includes a first color region 350R having a first energy band gap, a second color region 350G having a second energy band gap, and a third color region having a third energy band gap. (350B). Here, the first energy band gap, the second energy band gap, and the third energy band gap may be different energy band gaps.

In this way, a plurality of color regions (350R, 350G, 350B) with different energy band gaps are disposed in the color layer 350, so that each color region (350R, 350G, 350B) can transmit light of a specific wavelength. there is.

Additionally, the boundary areas of the color regions 350R, 350G, and 350B are formed with different energy band gaps, and the energy band gap transmits only energy of a specific wavelength, forming an energy barrier in the boundary area. Color mixing can be prevented.

In this embodiment, the color areas 350R, 350G, and 350B of the color layer 350 are explained by taking the example of red (R), green (G), and blue (B), which are the three primary colors of light.

Referring to FIGS. 4A and 5, in the first color region 350R among the color regions 350R, 350G, and 350B of the color layer 350, cadmium selenide (CdSe) is disposed in the core, and zinc selenide ( ZnSe) can be formed as a shell surrounding the core. The core/shell structure as described above is composed of a first bandgap region and can function as a color filter that transmits a wavelength of approximately 630 nm to 680 nm.

Referring to FIGS. 4B and 5, when external energy is applied to the core/shell structure, the second color region 350G is formed by the zinc (Zn) component of zinc selenide (ZnSe) and selenium (Se) disposed in the shell. As the bond between components becomes weak, the zinc (Zn) component can diffuse into the core of the cadmium selenide (CdSe) component.

Accordingly, the core/shell structure is transformed into a gradient alloy structure, and the diffusion mobility of ions increases, thereby changing the light emission energy. Accordingly, a gradient alloy structure is formed in which a zinc selenide (ZnSe)-rich region is formed in the shell region and a cadmium selenide (CdSe)-rich region is formed in the core region.

The second color region 350G, which has been changed to a gradient alloy structure, is composed of a second bandgap region and can function as a color filter that transmits a wavelength of approximately 530 nm to 580 nm.

Referring to FIGS. 4C and 5, the third color region 350B has a gradient alloy structure, and when energy is continuously applied, the diffusion mobility of ions further increases, thereby changing the light emission energy. . Accordingly, a homogeneous alloy structure with the chemical formula ZnxCd1-xSe can be formed.

The third color region 350B, which has been changed to a homogeneous alloy structure, is composed of a third bandgap region and can function as a color filter that transmits a wavelength of approximately 420 nm to 470 nm.

In this way, due to the color areas having different energy band gaps, each color area can act as a color filter by transmitting only different specific wavelengths, and the boundary between them is an overlap area where an energy barrier is formed due to the different energy band gaps. There is no need to place visible and structural structures such as in the border area.

Therefore, the thickness of the organic light emitting display device 100 can be slimmed by disposing the color layer 350 in the area where the organic layer is formed in the encap layer 310 according to an embodiment of the present invention.

6 to 17 are diagrams showing the manufacturing process of an organic light emitting display device according to an embodiment of the present invention.

Here, to avoid redundant description and for easy explanation, the description will be made by referring to FIGS. 1 to 5.

As shown in FIG. 6, an array layer 200 including thin film transistors is formed on a substrate 201, and a light emitting layer 300 connected to the thin film transistors is formed on the array layer 200.

Here, the light-emitting layer 300 may be a light-emitting layer that emits white color. It is desirable for the light emitting layer 300 to emit white color in order to filter out a plurality of color wavelengths in the color layer 350 to be disposed later.

As shown in FIG. 7, the first encap layer 312 is formed on the light emitting layer 300. The first encap layer 312 is disposed on the entire surface of the substrate 201 to protect the light emitting layer 300 from the outside. Here, the first encap layer 312 may be formed of an inorganic material. Inorganic materials may have a structure that makes it difficult to exchange materials between the outside and inside due to their denser structure than organic materials.

In this way, the first encap layer 312 is formed of an inorganic material to encapsulate a material that is easily oxidized, such as the organic light-emitting layer 270, so that it can easily protect the internal material from the outside.

As shown in FIG. 8, a core-shell layer 350a may be formed on the first encap layer 312.

The core-shell layer 350a may be formed, for example, with cadmium selenide (CdSe) disposed in the core and zinc selenide (ZnSe) as a shell surrounding the core. As described above, the core-shell layer 350a can be formed by mixing an organic material as a crosslinking agent with the core-shell. That is, the formability can be improved in forming the core-shell layer 350a by mixing the organic material with the core-shell.

As shown in FIGS. 9 and 10, a mask layer 900 is formed on the core-shell layer 350a, and a portion of the mask layer 900 is removed to form a first mask pattern 910. Here, the mask 900 can be formed as a photomask to form a first mask pattern 910 that exposes a portion of the core-shell layer 350a through processes such as exposure and development.

The first mask pattern 910 may expose a portion of the core-shell layer 350a and cover the remaining portion with the first mask pattern 910. Here, the area where the core-shell layer 350a is exposed is called the first area FA. The core-shell layer 350a exposed in the first area FA may be the same area as the first color area 350R.

As shown in FIG. 11, a first energy band gap region may be formed by providing at least one of heat energy, UV energy, and a mixture of these energies to the exposed core-shell layer 350a. This embodiment will be described by showing that UV is provided.

Here, energy may be provided by controlling the intensity and time of energy provided to the first area FA, which is the exposed core-shell layer 350a. The degree of diffusion of the components of the core-shell layer 350a can be controlled by controlling the intensity of the energy and the time provided for the energy.

In other words, various degrees of change in the core-shell can be controlled by providing different energies to the exposed core-shell layer 350a at different times. Accordingly, the degree of change in the physical properties of the core-shell can be easily controlled by controlling the intensity of various energies and the energy provision time.

Specifically, implementing a red color in the first area FA will be described with reference to FIG. 5 as an example. When the core-shell layer 350a is exposed to the energy for a predetermined time, the components of the core-shell are Materials can spread. Accordingly, the components of the core-shell into which the material is diffused may change their physical properties and change into a material with a first energy band gap. That is, the core-shell layer 350a on the first area FA may be formed as a first color area 350R where the first energy band gap transmits a wavelength of 600 nm to 650 nm.

As another example, the core shell components of the core-shell layer 350a themselves may form a first color region 350R that can transmit red color wavelengths. In this case, the process can be simplified by not having to perform a process to change physical properties by providing the first mask pattern 910 and energy to the first area FA.

As shown in FIGS. 12 and 13, the first mask pattern 910 is removed, a photomask is formed again, and patterning is performed to form the second mask pattern 920.

The area where the core-shell layer 350a is exposed by the second mask pattern 920 is called the second area (SA). The second area SA may be disposed in a different area from the first area FA and may receive energy to form a second color area 350B having a second energy band gap.

Here, when energy such as UV or heat is provided to the second area SA, the materials of the core-shell components may diffuse. The diffused core-shell components can change physical properties and change into a material with a second energy band gap.

Here, the energy provided to the second area SA may be different from the energy provided to the first area FA, and the energy intensity and time provided may be controlled to cause a change in physical properties.

In this way, the physical properties of the core shell can be changed by changing different energies and provision times, thereby causing a change in the energy band gap. In this way, the core-shell layer 350a can form a second color region 350B that causes a change in energy band gap.

As shown in FIGS. 14 and 15, a third mask pattern 930 is formed on the coresha layer 350a on which the first color region 350R and the second color region 350B are formed. The third mask pattern 930 may block the first and second color areas 350R and 350B from light and expose the third area TA. In other words, the third area TA may be the core-shell layer 350a.

When energy is provided to the third area TA, which is the exposed core-shell layer 350a, the physical properties of the core-shell change due to material transfer of core-shell components in the third area TA, as described above.

The changed physical properties can be formed as a third color region 350G having a third energy band gap. Here, the third color area 350G can be formed. Here, the energy intensity and energy provision time provided to the core-shell layer 350a may be different from the energy intensity and energy provision time provided to the first and second color regions 350R and 350B.

In this way, different energy intensities and different energy provision times are applied to the first to third regions (FA, SA, TA) of the core-shell layer 350a on the color layer 350 according to an embodiment of the present invention. By providing this, color regions 350R, 350G, and 350B can be formed with different energy band gaps.

In addition, the boundary areas of the color areas 350R, 350G, and 350B have different energy band gaps, so the energy band gap transmits only energy of a specific wavelength, thereby forming an energy barrier in the boundary area to prevent color mixing. .

In addition, the color layer 350 can replace the planarization layer as a plurality of color areas are formed on the same layer made of the same material.

As shown in FIG. 16, a second encap layer 314 covering the color layer 350 may be formed on the color layer 350 having a plurality of energy band gaps.

Here, the second encap layer 314 may use the same material as the first encap layer 312, but is not limited thereto.

In this way, by forming the color layer 350 on the first encap layer 312 and forming the second encap layer 314 on the color layer 350, the color layer 350 is formed inside the encap layer 310. can be placed.

Therefore, the thickness of the organic light emitting display device 100 can be slimmed by disposing the color layer 350 in the area where the organic layer is formed in the encap layer 310 according to an embodiment of the present invention.

As shown in FIG. 17, the organic light emitting display device 100 can be formed by forming a protective cover 390 on the second encap layer 314. The protective cover 390 can protect the encap layer 310, color layer 350, and array layer 20 disposed below the protective cover 390.

Therefore, the thickness of the organic light emitting display device 100 can be slimmed by arranging the color layer 350 in the area where the organic layer is formed, and the encap layer 310 according to an embodiment of the present invention can slim the thickness of the organic light emitting display device 100. The boundary regions of each color region (350R, 350G, and 350B) formed by energy band gaps have different energy band gaps. As a result, the energy band gap transmits only energy of a specific wavelength, forming an energy barrier in the boundary region, resulting in color mixing. It can be prevented.

The above description is merely an illustrative explanation of the technical idea of the present invention, and various modifications and variations will be possible to those skilled in the art without departing from the essential characteristics of the present invention. In addition, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention, but rather to explain it, and therefore the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be interpreted in accordance with the claims below, and all technical ideas within the equivalent scope should be interpreted as being included in the scope of rights of the present invention.

100: Organic light emitting display device 200: Array layer
201: substrate 300: light emitting layer
310: encap layer 312: first encap layer
314: second encap layer 350: color layer
390: Protective cover

Claims (13)

A substrate divided into a display area and a non-display area;
an array layer including a plurality of thin film transtors disposed on the display area of the substrate;
a light emitting layer disposed on the array layer;
an encapsulating layer that encapsulates the light emitting layer; and
Includes a color layer disposed inside the encap layer,
The encap layer is
A first encap layer disposed on the light emitting layer,
Comprising a second encap layer disposed on the color layer,
The color layer is disposed between the first encap layer and the second encap layer,
The color layer is an organic light emitting display device in which a plurality of color regions having different energy band gaps are disposed on the same layer made of the same material. According to claim 1,
In the display area,
The first encapsulation layer encapsulating the light emitting layer is disposed, and the second encapsulation layer is disposed to encapsulate the color layer,
In the non-display area,
An organic light emitting display device in which the first encap layer and the second encap layer that encapsulate both sides of the color layer are disposed in contact with each other. delete According to claim 1,
The color layer is,
A first color region having a first energy band gap and
a second color region having a second energy band gap;
Includes a third color region having a third energy band gap,
The first energy band gap, the second energy band gap, and the third energy band gap are different energy band gaps. According to claim 1,
An organic light emitting display device in which the light emitting layer emits white color. Forming an array layer including thin film transistors on a substrate and forming a light emitting layer on the array layer;
forming a first encap layer on the light emitting layer;
forming a core-shell layer on the first encap layer;
Forming a color layer having a plurality of color regions by providing energy to the core-shell layer for each region; and
Comprising the step of forming a second encap layer on the color layer,
In the step of forming a color layer having a plurality of color regions by providing energy for each region to the core-shell layer,
A method of manufacturing an organic light emitting display device in which the energy provided on the core-shell layer is one of thermal energy, UV energy, and a mixture of these. According to clause 6,
In the step of forming a light emitting layer on the array layer,
A method of manufacturing a display device in which the light emitting layer emits white color. According to clause 6,
The step of forming a first encap layer on the light emitting layer includes:
The first encap layer is a method of manufacturing an organic light emitting display device, which includes covering the entire surface of the substrate including the light emitting layer with an inorganic material. delete According to clause 6,
In the step of forming a color layer having a plurality of color regions by providing energy for each region to the core-shell layer,
A method of manufacturing an organic light emitting display device, which is a step of forming color areas having different energy band gaps by controlling the intensity of the energy and the provision time of the energy to be different. According to clause 6,
In the step of forming a color layer having a plurality of color regions by providing energy for each region to the core-shell layer,
a first color region having a first energy bandgap,
a second color region disposed in a different region from the first color region and having a second energy band gap;
A third color region disposed in a different region from the second color region and having a third energy band gap,
A method of manufacturing an organic light emitting display device, which is a step of forming a. According to clause 6,
In forming a second encap layer on the color layer,
The method of manufacturing an organic light emitting display device, wherein the second encap layer is formed of the same material as the first encap layer. According to clause 6,
A method of manufacturing an organic light emitting display device further comprising forming a protective cover on the second encap layer.

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