WO2024014567A1

WO2024014567A1 - Display device using light-emitting element and method for manufacturing same

Info

Publication number: WO2024014567A1
Application number: PCT/KR2022/010095
Authority: WO
Inventors: 유영길; 백승미
Original assignee: 엘지전자 주식회사
Priority date: 2022-07-12
Filing date: 2022-07-12
Publication date: 2024-01-18

Abstract

The present invention is applicable to display-related technical fields and relates to, for example, a display device using a micro light-emitting diode (LED). The present invention may comprise: a substrate; partition walls which are arranged on the substrate to define unit subpixel areas and each have a multilayer structure comprising different materials; light-emitting elements each of which is provided in each of the unit subpixel areas to form each unit subpixel; color conversion layers each of which converts light emitted from each of the light-emitting elements into a color corresponding to each of the unit subpixel areas; and color filter layers each of which is disposed on each of the color conversion layers.

Description

Display device using light-emitting elements and method of manufacturing the same

The present invention is applicable to display device-related technical fields, for example, relates to a display device using micro LED (Light Emitting Diode).

Recently, in the field of display technology, display devices with excellent characteristics such as thinness and flexibility have been developed. The major displays currently commercialized are LCD (Liquid Crystal Display) and OLED (Organic Light Emitting Diodes).

Meanwhile, Light Emitting Diode (LED) is a semiconductor light emitting device well known for converting current into light. Starting with the commercialization of red LED using GaAsP compound semiconductor in 1962, it has been followed by GaP:N series green LED. It has been used as a light source for display images in electronic devices, including information and communication devices.

Recently, these light emitting diodes (LEDs) have been gradually miniaturized, manufactured into micrometer-sized LEDs, and used as pixels in display devices.

This LED technology exhibits characteristics of low power, high brightness, and high reliability compared to other display devices/panels, and can also be applied to flexible devices. Therefore, it has been actively studied in recent years by research institutes and companies.

In the subpixel configuration of a display device, it can be implemented using a blue LED and a color conversion layer material together with the blue LED.

At this time, the light converted through the blue LED can increase the beam angle because the color conversion material causes light diffusion in the form of microspheres. Therefore, when applied to a display device that displays images or text, color interference (cross-talk) may occur.

To prevent this, a method of constructing a partition wall and printing quantum dots (QD), a nano color conversion material, through inkjet can also be considered. However, in the case of these nano color conversion materials (QDs), a coffee ring effect occurs in subpixels after printing, making it difficult to obtain uniform light.

In this way, a conversion display that uses a blue LED as a blue light source and converts it to green and red using the blue LED is affected by the thickness, efficiency, and dispersibility of the color conversion material (QD, phosphor, etc.) There is a disadvantage that optical uniformity between pixels may be reduced.

To overcome this difference in color uniformity, the size of the color conversion layer (color conversion layer) is reduced and the amount of color conversion coated on each subpixel is adjusted to be uniform. During the film formation stage (drying, curing) after coating, color uniformity may deteriorate due to agglomeration of nano color conversion (quantum dots, QD).

Therefore, a method to solve this problem is required.

The technical problem to be solved by the present invention is to provide a display device using a light emitting device that can improve color uniformity in a display device using a light emitting device and a method of manufacturing the same.

In addition, the present invention seeks to provide a display device using a light emitting device that can improve the color purity of light emitted from each unit subpixel area and a method of manufacturing the same.

In addition, it is intended to provide a display device using a light-emitting device and a method of manufacturing the same, which can prevent deterioration of color purity due to non-uniformity of the color conversion layer located on the light-emitting device and converting blue light.

In addition, the present invention seeks to provide a display device using a light emitting element that can prevent the coffee ring effect caused by agglomeration of materials forming a color conversion layer, and a method of manufacturing the same.

In addition, a display device using a light-emitting element in which the color conversion layer material is evenly coated within the partition forming the unit subpixel and the color-converted light is localized and emitted without mixing, thereby improving the color purity of the display; We would like to provide the manufacturing method.

As a first aspect for achieving the above object, the present invention includes: a substrate; a partition wall located on the substrate, defining a unit subpixel area, and having a multi-layer structure including different materials; a light emitting element installed within the unit subpixel to form each unit subpixel; a color conversion layer that converts the light emitted from the light emitting device into a color corresponding to each unit subpixel area; And it may include a color filter layer located on the color conversion layer.

As an exemplary embodiment, at least a layer of the partition wall contacting the color conversion layer may include a hydrophilic material.

As an exemplary embodiment, the hydrophilic material can alleviate the non-uniformity of the color conversion layer.

As an exemplary embodiment, the barrier rib includes: a first barrier rib including a hydrophilic material; and a second barrier rib located on the first barrier rib and including a hydrophobic material.

As an exemplary embodiment, the surface of the first partition may be coated with the hydrophilic material.

As an exemplary embodiment, the surface of the second partition may be coated with the hydrophobic material.

As an exemplary embodiment, at least a first layer of the partition located on a side of the light emitting device may include a hydrophilic material.

As an exemplary embodiment, the color conversion layer may be located within the partitioned unit subpixel area.

As an exemplary embodiment, the color filter layer may include a plurality of color filters corresponding to the color of each unit subpixel area.

As an exemplary embodiment, a black matrix may be positioned between each color filter.

As a second aspect for achieving the above object, the present invention includes a wiring board; a partition located on the wiring board, defining a unit subpixel area, including different materials, and having at least two layers including a first layer and a second layer on the first layer; a light emitting element installed within the unit subpixel to form each unit subpixel; a color conversion layer that converts the light emitted from the light emitting device into a color corresponding to each unit subpixel area; and a color filter layer located on the color conversion layer, wherein at least the first layer of the partition wall located on a side of the light emitting device may include a hydrophilic material.

As an exemplary embodiment, at least a layer of the partition wall contacting the color conversion layer may include the hydrophilic material.

As an exemplary embodiment, the barrier rib includes: a first barrier rib including a hydrophilic material in the first layer; and a second partition wall including a hydrophobic material in the second layer.

According to one embodiment of the present invention, the following effects are achieved.

First, according to an embodiment of the present invention, color uniformity can be improved in a display device using a light-emitting element.

In addition, it is possible to prevent deterioration of color purity due to non-uniformity of the color conversion layer located on the light emitting device and converting blue light.

In particular, it is possible to prevent the coffee ring effect caused by agglomeration of materials forming the color conversion layer, thereby preventing deterioration of color purity due to unevenness of the color conversion layer.

Additionally, the color conversion layer material may be evenly coated within the partition wall forming the unit subpixel. Therefore, the occurrence of coffee ring, which is a phenomenon in which color conversion layer materials agglomerate, can be reduced.

In addition, the color purity of the display can be improved because the evenly converted light is localized and emitted without mixing with each other.

Furthermore, according to another embodiment of the present invention, there are additional technical effects not mentioned here. Those skilled in the art can understand the entire contents of the specification and drawings.

1 is a cross-sectional view showing unit subpixel areas of a display device using a light-emitting device according to an embodiment of the present invention.

Figure 2 is a cross-sectional schematic diagram of a display device using a light-emitting element according to an embodiment of the present invention.

3 to 10 are cross-sectional schematic diagrams showing each manufacturing step of a display device using a light-emitting device according to an embodiment of the present invention.

Hereinafter, embodiments disclosed in the present specification will be described in detail with reference to the attached drawings. However, identical or similar components will be assigned the same reference numbers regardless of reference numerals, and duplicate descriptions thereof will be omitted. The suffixes “module” and “part” for components used in the following description are given or used interchangeably only for the ease of preparing the specification, and do not have distinct meanings or roles in themselves. Additionally, in describing the embodiments disclosed in this specification, if it is determined that detailed descriptions of related known technologies may obscure the gist of the embodiments disclosed in this specification, the detailed descriptions will be omitted. In addition, it should be noted that the attached drawings are only for easy understanding of the embodiments disclosed in this specification, and should not be construed as limiting the technical idea disclosed in this specification by the attached drawings.

Furthermore, although each drawing is described for convenience of explanation, it is within the scope of the present invention for a person skilled in the art to implement another embodiment by combining at least two or more drawings.

Additionally, when an element such as a layer, region or substrate is referred to as being “on” another component, it is to be understood that it may be present directly on the other element or that there may be intermediate elements in between. There will be.

The display device described in this specification is a concept that includes all display devices that display information using a unit pixel or a set of unit pixels. Therefore, it is not limited to finished products but can also be applied to parts. For example, a panel corresponding to a part of a digital TV also independently corresponds to a display device in this specification. Finished products include mobile phones, smart phones, laptop computers, digital broadcasting terminals, PDAs (personal digital assistants), PMPs (portable multimedia players), navigation, Slate PCs, Tablet PCs, and Ultra This may include books, digital TVs, desktop computers, etc.

However, those skilled in the art will easily understand that the configuration according to the embodiments described in this specification may be applied to a device capable of displaying, even if it is a new product type that is developed in the future.

In addition, the semiconductor light emitting devices mentioned in this specification include LEDs, micro LEDs, etc., and may be used interchangeably.

Referring to FIG. 1, a display device using a semiconductor light emitting device according to an embodiment of the present invention may include a panel 100 in which subpixels are partitioned by a partition wall 110 having a multi-layer structure.

The unit subpixel area may include a red subpixel area 102, a green subpixel area 103, and a blue subpixel area 104.

The red subpixel area 102 may emit red light as a unit sub-pixel. The green subpixel area 103 may emit green light as a unit sub-pixel. Likewise, the blue subpixel area 104 may emit blue light as a unit sub-pixel.

The red subpixel area 102, green subpixel area 103, and blue subpixel area 104 may form one pixel area 101.

For example, the red subpixel area 102, the green subpixel area 103, and the blue subpixel area 104 may be arranged parallel to each other. Additionally, these

unit pixel areas

102, 103, and 104 may have multiple polygonal shapes that are closely packed together. For example, these

unit subpixel areas

102, 103, and 104 may form a rectangle or hexagon.

These multiple

unit subpixel areas

102, 103, and 104 may be formed by the partition wall 110. That is, the partition wall 110 may define a plurality of polygonal unit subpixel areas. In this way, each

unit subpixel area

102, 103, and 104 having a certain area may be divided by the partition wall 110.

A plurality of such

unit subpixel areas

102, 103, and 104 may be formed on the substrate 150. A thin film transistor (TFT; 151) is connected to this substrate 150 to implement an active matrix (AM) type display panel 100. For example, the substrate 150 may be a TFT substrate 150 on which the TFT layer 151 is formed. As another example, the substrate 150 may be a passive matrix (PM) type substrate.

A wiring electrode (not shown) connected to the TFT layer 151 and an electrode pad connected to the wiring electrode may be located in the plurality of

unit subpixel areas

102, 103, and 104. At this time, the TFT layer 151 may be a wiring electrode layer 151 including a wiring electrode. In this way, the substrate 150 may be a wiring board on which wiring electrodes are formed. Hereinafter, the TFT layer 151 will be described interchangeably with the wiring electrode layer 151.

The light emitting elements 120 forming the

unit subpixel areas

102, 103, and 104 may be electrically connected to and installed on these wiring electrodes or electrode pads.

In this way, the light-emitting device 120 is a first light-emitting device 121 installed in each unit subpixel including the red subpixel region 102, the green subpixel region 103, and the blue subpixel region 104. , may include a second light-emitting device 122 and a third light-emitting device 123.

In an exemplary embodiment, the first light-emitting device 121, the second light-emitting device 122, and the third light-emitting device 123 may all be blue light-emitting devices. Color conversion layers 130 and 140 may be located on these blue light emitting devices. For example, the red color conversion layer 130 may be located on the first light emitting device 121 to form a red subpixel. Additionally, as an example, the green color conversion layer 140 may be located on the second light emitting device 122 to create green-red subpixels.

At least the layer 111 in contact with the color conversion layers 130 and 140 of the partition wall 110 having a multi-layer structure that partitions the plurality of

subpixel areas

102, 103, and 104 may include a hydrophilic material. In other words, at least the layer 111 located on the side of the light emitting device 120 of the partition wall 110 may include a hydrophilic material.

These hydrophilic materials can alleviate the non-uniformity of the color conversion layers 130 and 140. For example, the color conversion layers 130 and 140 may be coated in a plurality of

subpixel areas

102, 103, and 104 divided by the partition wall 110 and dried or cured to form a film. This hydrophilic material may be used to form a film. The included layer 111 can alleviate or prevent heterogeneity caused by agglomeration of the color conversion layers 130 and 140. This will be described in detail later.

Such a partition wall 110 may include a first partition wall 111 forming a first layer and a second partition wall 112 located on the first layer forming a second layer.

This first partition wall 111 may include a hydrophilic material. For example, the entire first barrier rib 111 may be formed of a hydrophilic material, or the surface of the first barrier rib 111 may be coated with a hydrophilic material.

Meanwhile, the second partition wall 112 may include a hydrophobic material. For example, the entire second barrier rib 112 may be formed of a hydrophilic material, or the surface of the second barrier rib 112 may be coated with a hydrophobic material.

As explained above, the subpixel configuration of the display uses blue micro LEDs for blue and emits blue micro LEDs and color conversion materials (Green, Red) for red and green, thereby implementing green and red colors.

To overcome this difference in color uniformity, the size of the color conversion layer (color conversion layer) is reduced to uniformly adjust the amount of color conversion coated on each subpixel. During the film formation stage (drying, curing) after coating, color uniformity may deteriorate due to agglomeration of nano color conversion (quantum dots, QD).

When forming the partition wall 110 on a substrate on which a light emitting device 120 such as a micro LED is installed as in an embodiment of the present invention, the color conversion layer 130, which has a thickness of approximately 10 to 20 ㎛ for color conversion efficiency, 140) may be necessary. Therefore, it may be necessary to secure a corresponding thickness of the partition wall 110.

At this time, a coffee ring effect may occur due to agglomeration of the materials forming the color conversion layers 130 and 140, so the upper ( The lower layer (second layer) may contain a hydrophobic material, and the lower layer (first layer) may be coated in two or more layers to contain a hydrophilic material.

When the barrier wall 110 is formed as a multilayer (two or more layers) of materials with different polarities (hydrophilic, hydrophobic) using an embodiment of the present invention, the color conversion layer material is formed at the bottom of the barrier wall 110 due to the hydrophilic material. ) may be evenly coated on the first layer (111; first partition) and the portion on the substrate 150. On the other hand, since the second layer 112 of the partition 110 is coated with a hydrophobic material, the second layer 112 may not be coated on the side with a color conversion material. Accordingly, the occurrence of the coffee ring phenomenon, which is a phenomenon in which the color conversion layer material agglomerates at the edge of the second layer 112, can be reduced.

As described above, the display device according to an embodiment of the present invention includes a substrate 150, a partition wall 110 defining a plurality of

unit subpixel areas

102, 103, and 104 on the substrate 150, and The panel 100 can be configured to include a light emitting device 120 installed in each

unit subpixel area

102, 103, and 104.

That is, the

unit subpixel areas

102, 103, and 104 may include a red subpixel area 102, a green subpixel area 103, and a blue subpixel area 104. The light emitting device 120 may be a semiconductor light emitting diode (LED).

A light emitting device 120 that emits blue light or ultraviolet rays may be installed in each

unit subpixel area

102, 103, and 104. For example, blue light-emitting

devices

121, 122, and 123 may be installed in each

unit subpixel area

102, 103, and 104. Color conversion layers 130, 140, and 141 are located on these blue light-emitting

devices

121, 122, and 123, and can be converted into colors corresponding to each

unit pixel area

102, 103, and 104.

The semiconductor

light emitting devices

121, 122, and 123 forming such unit subpixels may be micro LEDs having a size of several to hundreds of microns. In some cases, the semiconductor

light emitting devices

121, 122, and 123 may be mini LEDs that are dozens of times the size of micro LEDs. Here, the mini LED may be different from the micro LED in terms of size and stacking structure. Specifically, the mini LED may further include a growth substrate for growing a semiconductor layer.

When micro LEDs are used as the semiconductor

light emitting devices

121, 122, and 123, the size of the micro LEDs may be approximately 20 μm or less.

Meanwhile, as another example, the red light-emitting device 121 may be installed in the red pixel area 102, the green light-emitting device 122 may be installed in the green pixel area 103, and the blue pixel area 104 A blue light emitting device 123 may be installed.

In this way, the display device may include light emitting elements 120 (121, 122, 123) installed within the

unit subpixel areas

102, 103, and 104 to form each unit subpixel.

Here, the substrate 150 may be a wiring board on which wiring electrodes (not shown) are arranged. At this time, each

light emitting element

121, 122, and 123 may be electrically connected to these wiring electrodes. Additionally, each

light emitting element

121, 122, and 123 is electrically connected to a common electrode (not shown) and can be turned on by current/voltage applied through the wiring electrode and the common electrode.

In Figure 2, the structure of the substrate 150 is simplified and briefly shown. Hereinafter, a description of the specific configuration of the substrate 150 will be omitted.

Each unit pixel area (102, 103, 104) has a color conversion layer (color A color conversion layer (130, 140) may be provided.

As an exemplary embodiment, the color conversion layers 130 and 140 may be provided in at least some of the

unit pixel areas

102, 103, and 104.

For example, the red color conversion layer 130 may be located in the red subpixel area 102, and the green color conversion layer 140 may be located in the green subpixel area 103. Meanwhile, a light diffuser 141 may be provided in the blue subpixel area 104. This light diffuser 141 may also be a type of color conversion layer. That is, the color conversion layers 130, 140, and 141 may be located in each

unit pixel area

102, 103, and 104.

As an exemplary embodiment, the red color conversion layer 130 includes a red inorganic phosphor or red QD (Quantum Dot) that converts blue light corresponding to a wavelength of 400 to 480 nm into a main wavelength band of 600 to 750 nm. It can be included.

As an exemplary embodiment, the green color conversion layer 140 includes a green inorganic phosphor or green QD (Quantum Dot) that converts blue light corresponding to a wavelength of 400 to 480 nm into a main wavelength band of 490 to 600 nm. It can be included.

The light diffuser 141 included in the blue subpixel area 104 may include a metal oxide, for example, TiO ₂ .

In this embodiment, the color conversion layers 130, 140, and 141 are filled in each

unit subpixel area

102, 103, and 104. For example, within the

unit subpixel areas

102, 103, and 104 partitioned by the partition 110, the color conversion layers 130, 140, and 141 are positioned to cover each semiconductor

light emitting device

121, 122, and 123. can do.

A color filter layer 200 may be located on the panel 100. This color filter layer 200 may be located on the color conversion layers 130, 140, and 141.

This color filter layer 200 may include a plurality of

color filters

210, 220, and 230 corresponding to the color of each unit subpixel area (102, 103, and 104). For example, the red color filter 210 may be located on the red subpixel area 102, the green color filter 220 may be located on the green subpixel area 103, and the blue subpixel area 104 A blue color filter 230 may be located on the image.

Therefore, the light emitted from the unit subpixel areas (102, 103, and 104) can be converted into each color (R, G, and B) by the color conversion layer (130, 140, and 141), and converted into each of these colors. The and do not overlap each other and reach each

color filter

210, 220, and 230 of the color filter layer 200, thereby achieving efficient pixel spatial arrangement.

Referring to FIG. 2 , for example, a black matrix 250 may be located between each

color filter

210, 220, and 230. Additionally, each

color filter

210, 220, and 230 may be located on the base layer 240. For example, the base layer 240 may include a glass substrate.

The color filter layer 200 may be attached to the partition wall 110 using an adhesive layer 260 . At this time, the adhesive layer 260 may be attached to the second partition wall 112 containing a hydrophobic material.

In some cases, the partition wall 110 may function as a black matrix. For example, the partition wall 110 may be formed of a dark-colored material such as black, or may include a dark-colored material layer.

In particular, the second partition 112 including a hydrophobic material may be visible from the outside of the display, so it may be formed of a dark-colored material such as black, or may include a dark-colored material layer.

In addition, this structure of the partition 110 improves the straightness of the light emitted from each

unit subpixel area

102, 103, and 104, so that the light emitted from each light emitting

device

121, 122, and 123 is localized without mixing with each other. Since it is localized and released and reaches the color filter layer 200, color purity can be improved.

Hereinafter, each manufacturing step of a display device using a light-emitting device according to an embodiment of the present invention will be described in detail with reference to FIGS. 3 to 10.

First, referring to FIG. 3, light emitting elements 121 capable of forming a plurality of subpixels are placed on a substrate 150 including the wiring electrode layer 151 or the TFT layer 151. It can be prepared to be electrically connected to (151).

Here, the light emitting device 121 may be a blue light emitting diode (LED). In this way, pixels that emit red, green, and blue light can be formed using blue light-emitting devices.

In this way, a thin film transistor (TFT) 151 is connected to the substrate 150 to implement an active matrix (AM) type display panel 100. For example, the substrate 150 may be a TFT substrate 150 on which the TFT layer 151 is formed. As another example, the substrate 150 may be a passive matrix (PM) type substrate.

Thereafter, referring to FIG. 4 , a first layer 113 of a hydrophilic material for forming the first partition 111 may be formed on the substrate (wiring substrate) 150 on which the light emitting device 121 is installed. Afterwards, a drying process of the formed first layer 113 of the hydrophilic material may be performed.

Next, referring to FIG. 5, a second layer 114 of a hydrophobic material may be formed on the first layer 113 of a hydrophilic material. Afterwards, a drying process of the formed second layer 114 of the hydrophobic material may be performed.

Thereafter, referring to FIG. 6, an exposure process of irradiating ultraviolet light, etc. to the portion to be formed as the partition wall 110 in the first layer 113 and the second layer 114 is performed using the mask layer 300. can do.

That is, exposure may be performed on a portion of the sequentially formed first layer 113 of a hydrophilic material and a second layer 114 of a hydrophobic material that will be formed as the partition wall 110 without being removed.

Next, referring to FIG. 7, the exposed first layer 113 and second layer 114 are developed to form a first barrier rib 111 including a hydrophilic material and a second barrier rib 112 including a hydrophobic material. A partition wall 110 including can be formed.

Meanwhile, on the other hand, the partition wall 110 may be formed through a process of exposing and developing the portion to be removed among the first layer 113 of the hydrophilic material and the second layer 114 of the hydrophobic material.

In addition, in this way, the first layer 113 of the hydrophilic material and the second layer 114 of the hydrophobic material are exposed and developed to form a partition 110 with a non-polar material instead, and the first layer ( 113) is coated with a hydrophilic material and the second layer 114 is coated with a hydrophobic material to form a partition 110 including a first partition 111 containing a hydrophilic material and a second partition 112 containing a hydrophobic material. may form. At this time, a separate hydrophilic treatment may be performed on the portion of the partition wall 110 to be coated with the hydrophilic material. Additionally, a separate hydrophobic treatment may be performed on the portion of the partition wall 110 to be coated with a hydrophobic material.

Next, referring to FIG. 8 , color conversion layers 130, 140, and 141 may be formed in each

subpixel area

102, 103, and 104 partitioned by the partition wall 110.

That is, the red color conversion layer 130 can be formed in the red subpixel 102. A green color conversion layer 140 may be formed in the green subpixel 103. Meanwhile, a light diffusion agent 141 may be formed in the blue subpixel 104.

The red color conversion layer 130 may include a red inorganic phosphor or a red quantum dot (QD). That is, the red color conversion layer 130 can be formed using a red inorganic phosphor or red QD (Quantum Dot).

The green color conversion layer 140 may include a green inorganic phosphor or a green QD (Quantum Dot). That is, the green color conversion layer 140 can be formed using a green inorganic phosphor or green QD (Quantum Dot).

Through this process, the panel 100 or the lower plate of the display device can be formed.

Referring to FIG. 9, a plurality of

color filters

210, 220, and 230 corresponding to the colors of the

unit subpixel areas

102, 103, and 104 may be formed on the base layer 240, such as a glass substrate.

In this color filter layer 200, a red color filter 210 may be located on the red subpixel area 102, a green color filter 220 may be located on the green subpixel area 103, and a blue subpixel area. A blue color filter 230 may be located on the area 104.

In addition, although not separately shown in FIG. 9, a black matrix 250 may be formed between each

color filter

210, 220, and 230.

Through this process, the top plate of the display device to be located on the panel 100 or including the top of the panel 10 can be formed.

Referring to FIG. 10, a display device can be formed by bonding the upper and lower plates of HyungseoODin in this way. At this time, as mentioned above, the color filter layer 200 forming the upper plate may be attached to the partition wall 110 of the lower plate by the adhesive layer 260.

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.

Accordingly, 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 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 construed as being included in the scope of rights of the present invention.

According to the present invention, it is possible to provide a display device using a semiconductor light-emitting device such as micro LED.

Claims

Board;

a partition wall located on the substrate, defining a unit subpixel area, and having a multi-layer structure including different materials;

a light emitting element installed within the unit subpixel to form each unit subpixel;

a color conversion layer that converts the light emitted from the light emitting device into a color corresponding to each unit subpixel area; and

A display device using a light-emitting device, comprising a color filter layer located on the color conversion layer.
The display device according to claim 1, wherein at least a layer in contact with the color conversion layer of the partition wall includes a hydrophilic material.
The display device according to claim 2, wherein the hydrophilic material alleviates non-uniformity of the color conversion layer.
The method of claim 1, wherein the partition wall is:

a first partition comprising a hydrophilic material; and

A display device using a light emitting device, characterized in that it is located on the first barrier rib and includes a second barrier rib containing a hydrophobic material.
The display device according to claim 4, wherein the surface of the first partition is coated with the hydrophilic material.
The display device according to claim 4, wherein the surface of the second partition is coated with the hydrophobic material.
The display device according to claim 1, wherein at least a first layer of the partition wall located on a side of the light emitting device includes a hydrophilic material.
The display device according to claim 1, wherein the color conversion layer is located within the divided unit subpixel area.
The display device according to claim 1, wherein the color filter layer includes a plurality of color filters corresponding to the color of each unit subpixel area.
The display device according to claim 9, wherein a black matrix is positioned between each color filter.
wiring board;

a partition located on the wiring board, defining a unit subpixel area, including different materials, and having at least two layers including a first layer and a second layer on the first layer;

a light emitting element installed within the unit subpixel to form each unit subpixel;

a color conversion layer that converts the light emitted from the light emitting device into a color corresponding to each unit subpixel area; and

It includes a color filter layer located on the color conversion layer,

A display device using a light-emitting device, wherein at least the first layer of the partition wall located on a side of the light-emitting device includes a hydrophilic material.
The display device according to claim 11, wherein at least a layer of the barrier rib in contact with the color conversion layer includes the hydrophilic material.
The display device according to claim 11, wherein the hydrophilic material alleviates non-uniformity of the color conversion layer.
The method of claim 11, wherein the partition wall is:

a first partition including a hydrophilic material in the first layer; and

A display device using a light emitting device, characterized in that the second layer includes a second barrier rib containing a hydrophobic material.
The display device according to claim 14, wherein the surface of the first partition is coated with the hydrophilic material.
The display device according to claim 14, wherein the surface of the second partition is coated with the hydrophobic material.
The display device according to claim 11, wherein the color conversion layer is located within the divided unit subpixel area.
The display device according to claim 11, wherein the color filter layer includes a plurality of color filters corresponding to the color of each unit subpixel area.