Display device

Abstract

The present disclosure relates to a display device. A display device according to one embodiment comprises a display panel and a color conversion panel facing each other and including a display area and a peripheral area, and a sealing member located between the display panel and the color conversion panel and located at the outer edge of the peripheral area. The display panel comprises a first substrate, a plurality of light-emitting elements located on one side of the first substrate, and an encapsulation layer located on the plurality of light-emitting elements and located in the display area and the peripheral area. The color conversion panel comprises a second substrate, a first color filter, a second color filter, and a third color filter located on one side of the second substrate and located in the display area and the peripheral area, and a partition and a dummy partition located on the first color filter, the second color filter, and the third color filter. At least one of the first color filter, the second color filter, and the third color filter comprises an opening located in the peripheral area, and the dummy partition overlaps with the opening.

Description

Technology Field

[0001] The present disclosure relates to a display device. Background Technology

[0002] A display device is a device that displays an image, and includes Liquid Crystal Displays (LCDs) and Organic Light Emitting Diodes (OLEDs). These display devices are used in a wide variety of electronic devices, such as mobile phones, navigation systems, digital cameras, e-books, portable game consoles, and various terminals.

[0003] An organic light-emitting display comprises two electrodes and an organic light-emitting layer located between them. Electrons injected from one electrode and holes injected from the other electrode combine in the organic light-emitting layer to form excitons. As the excitons transition from the excited state to the ground state, they release energy and emit light.

[0004] Recently, display devices including a color conversion panel have been proposed to reduce light loss and realize a display device with a high color reproduction rate. The color conversion panel may include semiconductor nanocrystals such as quantum dots and can convert incident light into different colors.

[0005] During the process of bonding such a color conversion panel to a substrate on which a light-emitting element is formed, there may be areas where pressure occurs. Consequently, cracking or tearing may occur in some areas, and defects such as reduced brightness may occur as this affects the area where the screen is displayed. The problem to be solved

[0006] The embodiments are intended to provide a display device capable of preventing defects such as brightness degradation by ensuring that no pressure occurs during the bonding process of the two substrates. means of solving the problem

[0007] A display device according to one embodiment comprises a display panel and a color conversion panel facing each other and including a display area and a peripheral area, and a sealing member located between the display panel and the color conversion panel and located at the outer edge of the peripheral area, wherein the display panel comprises a first substrate, a plurality of light-emitting elements located on one side of the first substrate, and an encapsulation layer located on the plurality of light-emitting elements and located in the display area and the peripheral area, and wherein the color conversion panel comprises a second substrate, a first color filter, a second color filter, and a third color filter located on one side of the second substrate and located in the display area and the peripheral area, and a partition and a dummy partition located on the first color filter, the second color filter, and the third color filter, wherein at least one of the first color filter, the second color filter, and the third color filter comprises an opening located in the peripheral area, and the dummy partition overlaps with the opening.

[0008] The above bulkhead is located in the above-mentioned display area, and the above-mentioned dummy bulkhead may be located in the above-mentioned surrounding area.

[0009] In the above display area, the partition wall overlaps with the first color filter, the second color filter, and the third color filter, and in the above surrounding area, the dummy partition wall may overlap with the first color filter, the second color filter, and the third color filter.

[0010] The above opening may include a first opening formed in the first color filter, a second opening formed in the second color filter, and a third opening formed in the third color filter.

[0011] The widths of the first opening, the second opening, and the third opening may be different.

[0012] The first opening, the second opening, and the third opening may overlap at least partially.

[0013] Within the above opening, the first color filter, the second color filter, and the third color filter may be formed in a stepped shape.

[0014] The above opening includes a second opening formed in the second color filter and a third opening formed in the third color filter, and in the surrounding area, the first color filter may not have an opening formed.

[0015] The above opening is formed in the third color filter, and in the surrounding area, the first color filter and the second color filter may not have an opening formed.

[0016] The height of the portion of the dummy bulkhead that overlaps with the opening may be lower than the height of the portion of the dummy bulkhead that does not overlap with the opening.

[0017] The height of the portion of the dummy bulkhead adjacent to the sealing member may be lower than the height of the portion of the dummy bulkhead adjacent to the display area.

[0018] A display device according to one embodiment may further include a spacer located on the partition wall.

[0019] A display device according to one embodiment may further include a dummy spacer located on the dummy bulkhead.

[0020] The above dummy spacer includes a light-blocking material and can overlap with the opening.

[0021] A display device according to one embodiment may further include a filling layer located between the display panel and the color conversion panel.

[0022] A display device according to one embodiment further comprises a first color conversion layer, a second color conversion layer, and a transmission layer located in the display area and surrounded by the partition wall, wherein the first color conversion layer overlaps with the first color filter, the second color conversion layer overlaps with the second color filter, and the transmission layer overlaps with the third color filter.

[0023] A display device according to one embodiment may further include a first capping layer located above the first color filter, the second color filter, and the third color filter.

[0024] A display device according to one embodiment may further include the first color conversion layer, the second color conversion layer, the transmission layer, the partition wall, and a second capping layer located on the dummy partition wall.

[0025] The above dummy bulkhead may be located within the opening.

[0026] The above dummy bulkhead can fill the entire interior of the opening. Effects of the invention

[0027] According to the embodiments, by preventing pressure from occurring during the bonding process of the substrates on both sides of the display device, defects such as a decrease in brightness can be prevented. Brief explanation of the drawing

[0028] FIG. 1 is a schematic plan view of a display device according to one embodiment. FIG. 2 is a schematic cross-sectional view of a display device according to one embodiment. FIG. 3 is a cross-sectional view showing the display area of ​​a display device according to one embodiment. FIG. 4 is a cross-sectional view showing the peripheral area of ​​a display device according to one embodiment. FIG. 5 is a cross-sectional view showing the peripheral area of ​​a display device according to one embodiment. FIG. 6 is a cross-sectional view showing the peripheral area of ​​a display device according to one embodiment. FIG. 7 is a cross-sectional view showing the peripheral area of ​​a display device according to one embodiment. Specific details for implementing the invention

[0029] Hereinafter, various embodiments of the present invention will be described in detail with reference to the attached drawings so that those skilled in the art can easily implement the present invention. The present invention may be embodied in various different forms and is not limited to the embodiments described herein.

[0030] To clearly explain the present invention, parts unrelated to the explanation have been omitted, and the same reference numerals are used for identical or similar components throughout the specification.

[0031] Furthermore, the size and thickness of each component shown in the drawings are depicted arbitrarily for convenience of explanation, and thus the present invention is not necessarily limited to what is illustrated. Thicknesses have been enlarged in the drawings to clearly represent various layers and regions. Additionally, for convenience of explanation, the thickness of some layers and regions has been exaggerated in the drawings.

[0032] Furthermore, when it is said that a part, such as a layer, membrane, region, or plate, is "on" or "on" another part, this includes not only the case where it is "directly above" the other part, but also the case where there is another part in between. Conversely, when it is said that a part is "directly above" another part, it means that there is no other part in between. Also, saying that a part is "on" or "on" a reference part means that it is located above or below the reference part, and does not necessarily mean that it is located "on" or "on" in the direction opposite to gravity.

[0033] Furthermore, throughout the specification, when a part is described as "including" a certain component, this means that, unless specifically stated otherwise, it does not exclude other components but may include additional components.

[0034] Additionally, throughout the specification, "planar" means when the subject part is viewed from above, and "cross-sectional" means when the cross-section obtained by vertically cutting the subject part is viewed from the side.

[0035] A display device according to one embodiment will be described below with reference to FIGS. 1 to 4.

[0036] FIG. 1 is a schematic plan view of a display device according to one embodiment, FIG. 2 is a schematic cross-sectional view of a display device according to one embodiment, FIG. 3 is a cross-sectional view showing a display area of ​​a display device according to one embodiment, and FIG. 4 is a cross-sectional view showing a peripheral area of ​​a display device according to one embodiment.

[0037] As illustrated in FIG. 1, a display device according to one embodiment may include a display area (DA) and a surrounding area (PA).

[0038] A plurality of pixels (PX) may be located in a display area (DA). The plurality of pixels (PX) may be arranged in a matrix and may receive an image signal to display an image accordingly. At this time, the arrangement of the plurality of pixels (PX) may be varied. Although not illustrated, a display device according to one embodiment may further include a plurality of signal lines. The signal lines may consist of a plurality of scan lines, a plurality of light emission control lines, a plurality of data lines, a plurality of first initialization voltage lines, a plurality of second initialization voltage lines, a plurality of driving voltage lines, etc. Each of these signal lines may transmit a scan signal, a light emission control signal, a data signal, a first initialization voltage, a second initialization voltage, a driving voltage, etc. The plurality of signal lines may be positioned to intersect each other in a first direction (DR1) or a second direction (DR2). At this time, the first direction (DR1) may be a row direction, and the second direction (DR2) may be a column direction. Additionally, each pixel (PX) may include a plurality of transistors, a capacitor, and at least one light-emitting diode connected to the plurality of signal lines. That is, the display device according to one embodiment may be an organic light-emitting display device. However, the type of display device is not limited thereto and may be composed of various types of display devices. For example, the display device may be composed of a liquid crystal display device, an electrophoretic display device, an electrowetting display device, etc. In addition, the display device may be composed of next-generation display devices such as a micro light-emitting diode (Micro LED) display device, a quantum dot light-emitting diode (QLED) display device, or a quantum dot organic light-emitting diode (QD-OLED) display device.

[0039] A voltage transmission line for transmitting voltage to multiple signal lines may be located in the peripheral area (PA). In this case, the voltage transmission line may be formed to surround the display area (DA). The voltage transmission line may consist of a first initialization voltage transmission line, a second initialization voltage transmission line, a driving voltage transmission line, etc. Additionally, a driving unit for supplying voltage to multiple signal lines may be located in the peripheral area (PA). The voltage transmission line may be connected between the signal lines and the driving unit.

[0040] As illustrated in FIG. 2, a display device according to one embodiment includes a display panel (1000) and a color conversion panel (2000) that overlap each other.

[0041] The display panel (1000) may include a plurality of first pixels (PX1), a plurality of second pixels (PX2), and a plurality of third pixels (PX3), and a light-emitting element (ED) may be located at each of the first pixels (PX1), second pixels (PX2), and third pixels (PX3). That is, the display panel (1000) may include a plurality of light-emitting elements (ED). Each light-emitting element (ED) may emit light, and the display panel (1000) may display a screen by controlling the light emitted from the light-emitting elements (ED) of the first pixels (PX1), second pixels (PX2), and third pixels (PX3). The light-emitting element (ED) may be made of an organic light-emitting element, and the display panel (1000) may be made of an organic light-emitting display panel. However, the type of the display panel (1000) is not limited thereto and may be made of various types of panels. The display panel (1000) may be made of a flat rigid display panel or a flexible display panel that can be flexibly bent.

[0042] The color conversion panel (2000) may be positioned to face the display panel (1000). The color conversion panel (2000) may include a transparent layer (520a), a first color conversion layer (520b), and a second color conversion layer (520c). The transparent layer (520a) may overlap with a light-emitting element (ED) located in a first pixel (PX1). Light emitted from the light-emitting element (ED) of the first pixel (PX1) may pass through the transparent layer (520a) and emit light of a first wavelength. The first color conversion layer (520b) may overlap with a light-emitting element (ED) located in a second pixel (PX2). Light emitted from the light-emitting element (ED) of the second pixel (PX2) may pass through the first color conversion layer (520b) and emit light of a second wavelength. The second color conversion layer (520c) may overlap with the light-emitting element (ED) located in the third pixel (PX3). Light emitted from the light-emitting element (ED) of the third pixel (PX3) may pass through the second color conversion layer (520c) to emit light of a third wavelength. For example, the light of the first wavelength may be blue light, the light of the second wavelength may be red light, and the light of the third wavelength may be green light. That is, the first pixel (PX1), the second pixel (PX2), and the third pixel (PX3) may be a blue pixel, a red pixel, and a green pixel, respectively. However, this is not limited thereto, and the colors displayed by the first pixel (PX1), the second pixel (PX2), and the third pixel (PX3) may be varied. In addition, in addition to the first pixel (PX1), the second pixel (PX2), and the third pixel (PX3), additional pixels displaying other colors may be included.

[0043] As illustrated in FIG. 3, a display device according to one embodiment includes a display panel (1000) and a color conversion panel (2000) that overlap each other. A filling layer (290) may be located between the display panel (1000) and the color conversion panel (2000).

[0044] First, a stacked structure of a display panel (1000) in a display area (DA) of a display device according to one embodiment will be described.

[0045] The display panel (1000) may include a first substrate (110), a semiconductor (131) located on one side of the first substrate (110), a transistor (TFT) including a gate electrode (124), a source electrode (173) and a drain electrode (175), a gate insulating film (120), a first interlayer insulating film (160), a second interlayer insulating film (180), a pixel electrode (191), a light-emitting layer (370), a pixel defining layer (350), a common electrode (270), and an encapsulation layer (400). The transistor (TFT), etc., may be located on one side of the first substrate (110) of the display panel (1000) facing the second substrate (210) of the color conversion panel (2000).

[0046] The first substrate (110) may include a material having rigid properties such as glass, or a material that can be bent such as plastic, polyimide, etc. The first substrate (110) may be flexible, stretchable, foldable, bendable, or rollable.

[0047] A buffer layer (111) may be further positioned on the first substrate (110) to flatten the surface of the first substrate (110) and block impurities from penetrating into the semiconductor (131). The buffer layer (111) may include an inorganic material, for example, an inorganic insulating material such as silicon nitride (SiNx), silicon oxide (SiOx), or silicon nitride (SiOxNy). The buffer layer (111) may have a single layer or a multilayer structure of the above material. A barrier layer (not shown) may be further positioned on the first substrate (110). In this case, the barrier layer may be located between the first substrate (110) and the buffer layer (111). The barrier layer may include an inorganic insulating material such as silicon nitride (SiNx), silicon oxide (SiOx), or silicon nitride (SiOxNy). The barrier layer may have a single layer or a multilayer structure of the above material.

[0048] The semiconductor (131) may be positioned on the first substrate (110). The semiconductor (131) may include any one of amorphous silicon, polycrystalline silicon, and oxide semiconductor. For example, the semiconductor (131) may include low-temperature polysilicon (LTPS) or an oxide semiconductor material including at least one of zinc (Zn), indium (In), gallium (Ga), tin (Sn), and mixtures thereof. For example, the semiconductor (131) may include IGZO (Indium-Gallium-Zinc Oxide). The semiconductor (131) may include a channel region, a source region, and a drain region, which are distinguished depending on whether or not impurity doping is present. The source region and the drain region may have conductivity characteristics corresponding to a conductor.

[0049] The gate insulating film (120) can cover the semiconductor (131) and the first substrate (110). The gate insulating film (120) may include an inorganic insulating material such as silicon nitride (SiNx), silicon oxide (SiOx), or silicon nitrate (SiOxNy). The gate insulating film (120) may be a single layer or a multilayer structure of the above material.

[0050] The gate electrode (124) may be positioned on the gate insulating film (120). The gate electrode (124) may include a metal or metal alloy such as copper (Cu), molybdenum (Mo), aluminum (Al), silver (Ag), chromium (Cr), tantalum (Ta), or titanium (Ti). The gate electrode (124) may be composed of a single layer or multiple layers. The region of the semiconductor (131) that overlaps with the planar gate electrode (124) may be a channel region.

[0051] The first interlayer insulating film (160) can cover the gate electrode (124) and the gate insulating film (120). The first interlayer insulating film (160) may include an inorganic insulating material such as silicon nitride (SiNx), silicon oxide (SiOx), or silicon nitrate (SiOxNy). The first interlayer insulating film (160) may have a single layer or a multilayer structure of the above material.

[0052] The source electrode (173) and the drain electrode (175) may be located on the first interlayer insulating film (160). The source electrode (173) and the drain electrode (175) are respectively connected to the source region and the drain region of the semiconductor (131) by an opening formed in the first interlayer insulating film (160) and the gate insulating film (120). The aforementioned semiconductor (131), gate electrode (124), source electrode (173), and drain electrode (175) constitute a single transistor (TFT). According to an embodiment, the transistor (TFT) may include only the source region and the drain region of the semiconductor (131) instead of the source electrode (173) and the drain electrode (175). Although one transistor (TFT) is shown for each of the first pixel (PX1), second pixel (PX2), and third pixel (PX3), it is not limited thereto, and multiple transistors (TFTs) may be located for each of the first pixel (PX1), second pixel (PX2), and third pixel (PX3).

[0053] The source electrode (173) and drain electrode (175) may include metals or metal alloys such as aluminum (Al), copper (Cu), silver (Ag), gold (Au), platinum (Pt), palladium (Pd), nickel (Ni), molybdenum (Mo), tungsten (W), titanium (Ti), chromium (Cr), and tantalum (Ta). The source electrode (173) and drain electrode (175) may be composed of a single layer or multiple layers. According to one embodiment, the source electrode (173) and drain electrode (175) may be composed of a triple layer including an upper layer, a middle layer, and a lower layer, wherein the upper layer and the lower layer may include titanium (Ti), and the middle layer may include aluminum (Al).

[0054] The second interlayer insulating film (180) may be positioned over the source electrode (173) and the drain electrode (175). The second interlayer insulating film (180) covers the source electrode (173), the drain electrode (175), and the first interlayer insulating film (160). The second interlayer insulating film (180) is intended to flatten the surface of the first substrate (110) equipped with a transistor (TFT), and may be an organic insulating film and may include one or more materials selected from the group consisting of polyimide, polyamide, acrylic resin, benzocyclobutene, and phenolic resin.

[0055] The pixel electrode (191) may be positioned on the second interlayer insulating film (180). The pixel electrode (191) is also called an anode electrode and may be composed of a single layer or multiple layers including a transparent conductive oxide film or a metal material. The transparent conductive oxide film may include ITO (Indium Tin Oxide), poly-ITO, IZO (Indium Zinc Oxide), IGZO (Indium Gallium Zinc Oxide), and ITZO (Indium Tin Zinc Oxide), etc. The metal material may include silver (Ag), molybdenum (Mo), copper (Cu), gold (Au), and aluminum (Al), etc.

[0056] The second interlayer insulating film (180) may include a via hole (81) that exposes the drain electrode (175). The drain electrode (175) and the pixel electrode (191) can be physically and electrically connected through the via hole (81) of the second interlayer insulating film (180). Accordingly, the pixel electrode (191) can receive an output current to be transmitted from the drain electrode (175) to the light-emitting layer (370).

[0057] A pixel defining layer (350) may be positioned on the pixel electrode (191) and the second interlayer insulating film (180). The pixel defining layer (350) includes a pixel opening (351) that overlaps with at least a portion of the pixel electrode (191). At this time, the pixel opening (351) may overlap with the center of the pixel electrode (191) and may not overlap with the edge portion of the pixel electrode (191). Accordingly, the size of the pixel opening (351) may be smaller than the size of the pixel electrode (191). The pixel defining layer (350) may delineate the formation location of the light-emitting layer (370) so that the light-emitting layer (370) may be positioned on the portion where the upper surface of the pixel electrode (191) is exposed. The pixel defining layer (350) may be positioned at the boundary between the first pixel (PX1), the second pixel (PX2), and the third pixel (PX3). The pixel defining layer (350) may be an organic insulating film comprising one or more materials selected from the group consisting of polyimide, polyamide, acrylic resin, benzocyclobutene, and phenolic resin. According to an embodiment, the pixel defining layer (350) may be formed as a black pixel defining layer (BPDL) comprising a black pigment.

[0058] Each of the multiple pixel openings (351) may have a shape similar to the pixel electrode (191) on a plane. For example, the pixel openings (351) and the pixel electrode (191) may be polygonal on a plane. In this case, the corner portions of the pixel openings (351) and the pixel electrode (191) may be chamfered. However, the shape of the pixel openings (351) and the shape of the pixel electrode (191) are not limited thereto and may be changed in various ways.

[0059] At this time, a plurality of pixel electrodes (191) corresponding to each of the first pixel (PX1), the second pixel (PX2), and the third pixel (PX3) may have different sizes on a plane. Likewise, a plurality of pixel openings (351) corresponding to each of the first pixel (PX1), the second pixel (PX2), and the third pixel (PX3) may have different sizes on a plane. For example, the pixel opening (351) and pixel electrode (191) corresponding to the second pixel (PX2) may each have a larger size on a plane than the pixel opening (351) and pixel electrode (191) corresponding to the third pixel (PX3). Additionally, the pixel opening (351) and pixel electrode (191) corresponding to the second pixel (PX2) may each have a smaller or similar size on a plane than the pixel opening (351) and pixel electrode (191) corresponding to the first pixel (PX1). However, it is not limited to this, and each pixel opening (351) and pixel electrode (191) can be set to have various sizes.

[0060] The light-emitting layer (370) may be located within a pixel opening (351) partitioned by a pixel defining layer (350). However, it is not limited thereto, and the light-emitting layer (370) may be located not only within the pixel opening (351) but also on the pixel defining layer (350). That is, the light-emitting layer (370) may be formed entirely on the first substrate (110). At this time, the light-emitting layer (370) may be formed by performing a deposition process using an open mask in which a portion corresponding to the display area (DA) is open. The light-emitting layer (370) may include a low-molecular or high-molecular organic material. Although the light-emitting layer (370) is shown as a single layer, in reality, auxiliary layers such as an electron injection layer, an electron transport layer, a hole transport layer, and a hole injection layer may also be included above and below the light-emitting layer (370). A hole injection layer and a hole transport layer may be located at the bottom of the light-emitting layer (370), and an electron transport layer and an electron injection layer may be located at the top of the light-emitting layer (370). Additionally, another light-emitting layer may be located on top of the light-emitting layer (370). That is, two or more light-emitting layers (370) may be stacked.

[0061] Although the city has been omitted, a spacer may be further positioned on the pixel definition layer (350). The spacer may contain the same material as the pixel definition layer (350). However, it is not limited thereto, and the spacer may be made of a material different from the pixel definition layer (350). The spacer may be an organic insulating film comprising one or more materials selected from the group consisting of polyimide, polyamide, acrylic resin, benzocyclobutene, and phenolic resin.

[0062] The common electrode (270) may be located on the pixel definition layer (350) and the light-emitting layer (370). The common electrodes (270) of the first pixel (PX1), the second pixel (PX2), and the third pixel (PX3) may be connected to each other. The common electrode (270) may be formed to be connected entirely on the first substrate (110). The common electrode (270) is also called a cathode electrode and may be formed as a transparent conductive layer including ITO (Indium Tin Oxide), IZO (Indium Zinc Oxide), IGZO (Indium Gallium Zinc Oxide), and ITZO (Indium Tin Zinc Oxide). The common electrode (270) may be made of a metallic material such as silver (Ag), magnesium (Mg), etc., or may be made in a mixed form. At this time, the thickness of the common electrode (270) may be adjusted to form a transparent conductive layer. Additionally, the common electrode (270) may have a translucent characteristic, and in this case, it may form a micro cavity together with the pixel electrode (191).

[0063] The pixel electrode (191), the light-emitting layer (370), and the common electrode (270) can constitute a light-emitting element (ED). The portion where the pixel electrode (191), the light-emitting layer (370), and the common electrode (270) overlap in the first pixel (PX1), the second pixel (PX2), and the third pixel (PX3) can become the light-emitting region of each light-emitting element (ED).

[0064] The encapsulation layer (400) may be positioned on the common electrode (270). The encapsulation layer (400) may include at least one inorganic film and at least one organic film. In this embodiment, the encapsulation layer (400) may include a first inorganic encapsulation layer (410), an organic encapsulation layer (420), and a second inorganic encapsulation layer (430). However, this is merely an example, and the number of inorganic films and organic films constituting the encapsulation layer (400) may be varied. For example, the encapsulation layer (400) may be stacked in the order of a first inorganic encapsulation layer, a second inorganic encapsulation layer, a first organic encapsulation layer, and a third inorganic encapsulation layer. Alternatively, the encapsulation layer (400) may be stacked in the order of a first inorganic encapsulation layer, a first organic encapsulation layer, a second inorganic encapsulation layer, and a third inorganic encapsulation layer. The display panel (1000) may include a display area (DA) for displaying a screen and a surrounding area (PA) surrounding the display area (DA). A first inorganic encapsulation layer (410), an organic encapsulation layer (420), and a second inorganic encapsulation layer (430) may be located in parts of the display area (DA) and the surrounding area (PA). According to an embodiment, the organic encapsulation layer (420) may be formed centered on the display area (DA), and the first inorganic encapsulation layer (410) and the second inorganic encapsulation layer (430) may be formed up to the surrounding area (PA). The encapsulation layer (400) is intended to protect the light-emitting element (ED) from moisture or oxygen that may enter from the outside, and one end of the first inorganic encapsulation layer (410) and the second inorganic encapsulation layer (430) may be formed to be in direct contact.

[0065] The bag layer (400) may come into contact with the filling layer (290). At this time, the second inorganic bag layer (430) of the bag layer (400) may come into contact with the filling layer (290). However, this is merely an example, and other layers may be located between the bag layer (400) and the filling layer (290).

[0066] Although the city has been omitted, the display device according to one embodiment may further include a sensing unit that detects touch. The sensing unit may include a plurality of sensing electrodes, etc., and the sensing unit may be located between the display panel (1000) and the color conversion panel (2000).

[0067] Next, a stacked structure of a color conversion panel (2000) in a display area (DA) of a display device according to one embodiment will be described.

[0068] The color conversion panel (2000) may include a second substrate (210) and a first color filter (230a), a second color filter (230b), and a third color filter (230c) located on one side of the second substrate (210).

[0069] The second substrate (210) may include a material having rigid properties such as glass, or a material that can be bent such as plastic, polyimide, etc. The second substrate (210) may be flexible, stretchable, foldable, bendable, or rollable.

[0070] The first color filter (230a) transmits light of the first wavelength and absorbs light of the remaining wavelengths, thereby increasing the purity of the first wavelength light emitted to the outside of the display device.

[0071] The second color filter (230b) transmits light of the second wavelength and absorbs light of the remaining wavelength, thereby increasing the purity of the light of the second wavelength emitted to the outside of the display device.

[0072] The third color filter (230c) transmits light of the third wavelength and absorbs light of the remaining wavelengths, thereby increasing the purity of the light of the third wavelength emitted to the outside of the display device.

[0073] The first color filter (230a), the second color filter (230b), and the third color filter (230c) may be positioned to overlap with the first pixel (PX1), the second pixel (PX2), and the third pixel (PX3), respectively. At the boundary between the first pixel (PX1), the second pixel (PX2), and the third pixel (PX3), the first color filter (230a), the second color filter (230b), and the third color filter (230c) may overlap each other to form a light-blocking area. Although it is illustrated that the first color filter (230a), the second color filter (230b), and the third color filter (230c) all overlap in the light-blocking area, this is not limited thereto. For example, two of the first color filter (230a), the second color filter (230b), and the third color filter (230c) may overlap to form a light-blocking area. For example, at the boundary between the first pixel (PX1) and the second pixel (PX2), the first color filter (230a) and the second color filter (230b) may overlap. At the boundary between the second pixel (PX2) and the third pixel (PX3), the second color filter (230b) and the third color filter (230c) may overlap. At the boundary between the third pixel (PX3) and the first pixel (PX1), the third color filter (230c) and the first color filter (230a) may overlap.

[0074] A low-refractive-index layer (240) may be positioned on one side of the first color filter (230a), the second color filter (230b), and the third color filter (230c). That is, the low-refractive-index layer (240) may be positioned between the first color filter (230a) and the transmission layer (520a), between the second color filter (230b) and the first color conversion layer (520b), and between the third color filter (230c) and the second color conversion layer (520c). However, the position of the low-refractive-index layer (240) is not limited thereto and can be varied. For example, the low-refractive-index layer (240) may be positioned on the transmission layer (520a), the first color conversion layer (520b), and the second color conversion layer (520c). Alternatively, the low refractive index layer (240) may comprise a plurality of layers, some layers may be located between the first color filter (230a) and the transmission layer (520a), between the second color filter (230b) and the first color conversion layer (520b), and between the third color filter (230c) and the second color conversion layer (520c), and the remaining layers may be located on the transmission layer (520a), the first color conversion layer (520b), and the second color conversion layer (520c). The low refractive index layer (240) may overlap the entirety of the first color filter (230a), the second color filter (230b), and the third color filter (230c). That is, the low refractive index layer (240) may be located over most of the area on the second substrate (210). The low refractive index layer (240) may comprise an organic or inorganic material with a low refractive index. For example, the refractive index of the low refractive index layer (240) may be about 1.1 or higher and about 1.3 or lower.

[0075] A first capping layer (250) may be positioned on one side of the first color filter (230a), the second color filter (230b), and the third color filter (230c). A low refractive index layer (240) may be positioned between the color filters (230a, 230b, 230c) and the first capping layer (250). The first capping layer (250) may include an inorganic insulating material such as silicon nitride (SiNx), silicon oxide (SiOx), or silicon nitrate (SiOxNy). The first capping layer (250) may be a single layer or a multilayer structure of the above material.

[0076] A partition wall (265) may be positioned on one side of the first capping layer (250). The partition wall (265) may include a first opening (267a) overlapping with the first color filter (230a), a second opening (267b) overlapping with the second color filter (230b), and a third opening (267c) overlapping with the third color filter (230c). The first opening (267a) may overlap with the light-emitting region of the first pixel (PX1), the second opening (267b) may overlap with the light-emitting region of the second pixel (PX2), and the third opening (267c) may overlap with the light-emitting region of the third pixel (PX3). The partition (265) can overlap with the light-blocking area where the first color filter (230a), the second color filter (230b), and the third color filter (230c) overlap each other. Thus, the partition (265) can overlap with the boundary between each pixel (PX1, PX2, PX3). The partition (265) can overlap with the pixel definition layer (350). The pixel definition layer (350) can overlap with the light-blocking area where the first color filter (230a), the second color filter (230b), and the third color filter (230c) overlap.

[0077] A spacer (269) may be positioned on top of the partition wall (265). The spacer (269) may contain the same material as the partition wall (265). However, it is not limited thereto, and the spacer (269) may be made of a different material from the partition wall (265). The spacer (269) may contain a light-blocking material. For example, the spacer (269) may contain a black pigment.

[0078] A transparent layer (520a) may be located within the first opening (267a), a first color conversion layer (520b) may be located within the second opening (267b), and a second color conversion layer (520c) may be located within the third opening (267c). The transparent layer (520a), the first color conversion layer (520b), and the second color conversion layer (520c) are surrounded by a partition wall (265).

[0079] The transparent layer (520a) may overlap with the first color filter (230a). The transparent layer (520a) may not overlap with the second color filter (230b) and the third color filter (230c). The transparent layer (520a) may transmit light incident from the light-emitting element (ED) of the first pixel (PX1). The light passing through the transparent layer (520a) may be light of a first wavelength. Light of a first wavelength emitted from the light-emitting element (ED) of the first pixel (PX1) may pass through the transparent layer (520a) and the first color filter (230a) in sequence and be emitted to the outside. The light of the first wavelength may be blue light having a maximum emission peak wavelength of about 380 nm to about 480 nm, for example, about 420 nm or more, about 430 nm or more, about 440 nm or more, or about 445 nm or more, and about 470 nm or less, about 460 nm or less, or about 455 nm or less. The transmission layer (520a) may include a plurality of scatterers (530).

[0080] The first color conversion layer (520b) may overlap with the second color filter (230b). The first color conversion layer (520b) may not overlap with the first color filter (230a) and the third color filter (230c). The first color conversion layer (520b) may convert light incident from the light-emitting element (ED) of the second pixel (PX2) into light of a second wavelength. Light emitted from the light-emitting element (ED) of the second pixel (PX2) is converted into light of a second wavelength while passing through the first color conversion layer (520b) and may be emitted to the outside while passing through the second color filter (230b). At this time, the light of the second wavelength may be red light with a maximum emission peak wavelength of about 600 nm to about 650 nm, for example, about 620 nm to about 650 nm. The first color conversion layer (520b) may include a plurality of first quantum dots (521b) and a plurality of scatterers (530).

[0081] The second color conversion layer (520c) may overlap with the third color filter (230c). The second color conversion layer (520c) may not overlap with the first color filter (230a) and the second color filter (230b). The second color conversion layer (520c) may convert light incident from the light-emitting element (ED) of the third pixel (PX3) into light of a third wavelength. Light emitted from the light-emitting element (ED) of the third pixel (PX3) is converted into light of a third wavelength while passing through the second color conversion layer (520c) and may be emitted to the outside while passing through the third color filter (230c). At this time, the light of the third wavelength may be green light with a maximum emission peak wavelength of about 500 nm to about 550 nm, for example, about 510 nm to about 550 nm. The second color conversion layer (520c) may include a plurality of second quantum dots (521c) and a plurality of scatterers (530).

[0082] Multiple scatterers (530) can scatter light incident on the transmission layer (520a), the first color conversion layer (520b), and the second color conversion layer (520c) to improve light efficiency.

[0083] Each of the first quantum dot (521b) and the second quantum dot (521c) (hereinafter also referred to as semiconductor nanocrystals) may independently comprise a Group II-VI compound, a Group III-V compound, a Group IV-VI compound, a Group IV element or compound, a Group I-III-VI compound, a Group II-III-VI compound, a Group I-II-IV-VI compound, or a combination thereof. The quantum dots may not contain cadmium.

[0084] The above Group II-VI compounds are diatomic compounds selected from the group consisting of CdSe, CdTe, ZnS, ZnSe, ZnTe, ZnO, HgS, HgSe, HgTe, MgSe, MgS, and mixtures thereof; ternary compounds selected from the group consisting of AgInS, CuInS, CdSeS, CdSeTe, CdSTe, ZnSeS, ZnSeTe, ZnSTe, HgSeS, HgSeTe, HgSTe, CdZnS, CdZnSe, CdZnTe, CdHgS, CdHgSe, CdHgTe, HgZnS, HgZnSe, HgZnTe, MgZnSe, MgZnS, and mixtures thereof; and may be selected from the group consisting of four-element compounds selected from the group consisting of HgZnTeS, CdZnSeS, CdZnSeTe, CdZnSTe, CdHgSeS, CdHgSeTe, CdHgSTe, HgZnSeS, HgZnSeTe, HgZnSTe, and mixtures thereof. The group II-VI compounds may further include a group III metal.

[0085] The above III-V group compounds may be selected from the group consisting of: diatomic compounds selected from the group consisting of GaN, GaP, GaAs, GaSb, AlN, AlP, AlAs, AlSb, InN, InP, InAs, InSb, and mixtures thereof; ternary compounds selected from the group consisting of GaNP, GaNAs, GaNSb, GaPAs, GaPSb, AlNP, AlNAs, AlNSb, AlPAs, AlPSb, InGaP, InNP, InNAs, InNSb, InPAs, InZnP, InPSb, and mixtures thereof; and quaternary compounds selected from the group consisting of GaAlNP, GaAlNAs, GaAlNSb, GaAlPAs, GaAlPSb, GaInNP, GaInNAs, GaInNSb, GaInPAs, GaInPSb, InAlNP, InAlNAs, InAlNSb, InAlPAs, InAlPSb, InZnP, and mixtures thereof. The above III-V group compounds may further include a group II metal (e.g., InZnP).

[0086] The above IV-VI group compounds may be selected from the group consisting of diatomic compounds selected from SnS, SnSe, SnTe, PbS, PbSe, PbTe and mixtures thereof; ternary compounds selected from the group consisting of SnSeS, SnSeTe, SnSTe, PbSeS, PbSeTe, PbSTe, SnPbS, SnPbSe, SnPbTe and mixtures thereof; and quaternary compounds selected from the group consisting of SnPbSSe, SnPbSeTe, SnPbSTe and mixtures thereof.

[0087] The above Group IV elements or compounds may be selected from the group consisting of monatomic compounds selected from the group consisting of Si, Ge, and combinations thereof; and diatomic compounds selected from the group consisting of SiC, SiGe, and combinations thereof, but are not limited thereto.

[0088] Examples of the above Group I-III-VI compounds include, but are not limited to, CuInSe2, CuInS2, CuInGaSe, and CuInGaS. Examples of the above Group I-II-IV-VI compounds include, but are not limited to, CuZnSnSe and CuZnSnS. The above Group IV element or compound may be selected from the group consisting of a monatomic element selected from the group consisting of Si, Ge, and mixtures thereof; and a diatomic compound selected from the group consisting of SiC, SiGe, and mixtures thereof.

[0089] The above Group II-III-VI compounds may be selected from the group consisting of ZnGaS, ZnAlS, ZnInS, ZnGaSe, ZnAlSe, ZnInSe, ZnGaTe, ZnAlTe, ZnInTe, ZnGaO, ZnAlO, ZnInO, HgGaS, HgAlS, HgInS, HgGaSe, HgAlSe, HgInSe, HgGaTe, HgAlTe, HgInTe, MgGaS, MgAlS, MgInS, MgGaSe, MgAlSe, MgInSe, and combinations thereof, but are not limited thereto.

[0090] The above Group I-II-IV-VI compounds may be selected from CuZnSnSe and CuZnSnS, but are not limited thereto.

[0091] In one embodiment, the quantum dots may not contain cadmium. The quantum dots may include semiconductor nanocrystals based on a Group III-V compound containing indium and phosphorus. The Group III-V compound may further include zinc. The quantum dots may include semiconductor nanocrystals based on a Group II-VI compound containing a chalcogen element (e.g., sulfur, selenium, tellurium, or a combination thereof) and zinc.

[0092] In quantum dots, the aforementioned binary compounds, ternary compounds, and / or quaternary compounds may exist within the particle at a uniform concentration, or may exist within the same particle with concentration distributions divided into partially different states. Additionally, one quantum dot may have a core / shell structure surrounding another quantum dot. The interface between the core and the shell may have a concentration gradient in which the concentration of the element present in the shell decreases toward the center.

[0093] In some embodiments, the quantum dot may have a core-shell structure comprising a core containing the aforementioned nanocrystal and a shell surrounding the core. The shell of the quantum dot may serve as a protective layer to maintain semiconductor properties by preventing chemical degradation of the core and / or as a charging layer to impart electrophoretic properties to the quantum dot. The shell may be a single layer or a multilayer. The interface between the core and the shell may have a concentration gradient in which the concentration of elements present in the shell decreases toward the center. Examples of the shell of the quantum dot include metal or non-metal oxides, semiconductor compounds, or combinations thereof.

[0094] For example, the oxide of the metal or nonmetal mentioned above may be exemplified as a binary compound such as SiO2, Al2O3, TiO2, ZnO, MnO, Mn2O3, Mn3O4, CuO, FeO, Fe2O3, Fe3O4, CoO, Co3O4, NiO, or a ternary compound such as MgAl2O4, CoFe2O4, NiFe2O4, CoMn2O4, but the present invention is not limited thereto.

[0095] In addition, the above semiconductor compounds may be examples of CdS, CdSe, CdTe, ZnS, ZnSe, ZnTe, ZnSeS, ZnTeS, GaAs, GaP, GaSb, HgS, HgSe, HgTe, InAs, InP, InGaP, InSb, AlAs, AlP, AlSb, etc., but the present invention is not limited thereto.

[0096] The interface between the core and the shell may have a concentration gradient in which the concentration of elements present in the shell decreases toward the center. Additionally, the semiconductor nanocrystal may have a structure comprising a single semiconductor nanocrystal core and a multilayer shell surrounding it. In one embodiment, the multilayer shell may have two or more layers, e.g., two, three, four, five, or more layers. Two adjacent layers of the shell may have a single composition or different compositions. Each layer in the multilayer shell may have a composition that varies along the radius.

[0097] Quantum dots can have a full width of half maximum (FWHM) of the emission wavelength spectrum of about 45 nm or less, preferably about 40 nm or less, and more preferably about 30 nm or less, and color purity or color reproducibility can be improved in this range. In addition, since the light emitted through these quantum dots is emitted in all directions, the viewing angle can be improved.

[0098] The above quantum dot may have a shell material and a core material having different energy band gaps. For example, the energy band gap of the shell material may be larger than that of the core material. In another embodiment, the energy band gap of the shell material may be smaller than that of the core material. The above quantum dot may have a multilayer shell. In a multilayer shell, the energy band gap of the outer layer may be larger than that of the inner layer (i.e., the layer closest to the core). In a multilayer shell, the energy band gap of the outer layer may be smaller than that of the inner layer.

[0099] Quantum dots can control their absorption / emission wavelengths by adjusting their composition and size. The maximum emission peak wavelength of the quantum dots can have a wavelength range of ultraviolet to infrared or longer.

[0100] The quantum dot may include an organic ligand (e.g., having a hydrophobic residue and / or a hydrophilic residue). The organic ligand residue may be bonded to the surface of the quantum dot. The organic ligand may include RCOOH, RNH2, R2NH, R3N, RSH, R3PO, R3P, ROH, RCOOR, RPO(OH)2, RHPOOH, R2POOH, or a combination thereof, wherein R is independently a C3 to C40 (e.g., C5 or more and C24 or less) substituted or unsubstituted alkyl, a C3 to C40 (e.g., C5 or more and C24 or less) substituted or unsubstituted aliphatic hydrocarbon group such as a C3 to C40 (e.g., substituted or unsubstituted alkenyl), an C6 to C40 (e.g., C6 or more and C20 or less) substituted or unsubstituted aromatic hydrocarbon group such as a C6 to C40 (e.g., C6 or more and C20 or less) substituted or unsubstituted aryl group, or a combination thereof.

[0101] Examples of the above organic ligands include thiol compounds such as methanethiol, ethanethiol, propanethiol, butanethiol, pentanthiol, hexanethiol, octanethiol, dodecanethiol, hexadecanethiol, octadecanethiol, and benzylthiol; amines such as methaneamine, ethaneamine, propaneamine, butanamine, pentylamine, hexylamine, octylamine, nonylamine, decylamine, dodecylamine, hexadecylamine, octadecylamine, dimethylamine, diethylamine, dipropylamine, tributylamine, and trioctylamine; and carboxylic acid compounds such as methanoic acid, ethanoic acid, propanoic acid, butanoic acid, pentanic acid, hexanoic acid, heptanoic acid, octanoic acid, dodecanoic acid, hexadecanoic acid, octadecanic acid, oleic acid, and benzoic acid. Phosphine compounds such as methylphosphine, ethylphosphine, propylphosphine, butylphosphine, pentylphosphine, octylphosphine, dioctylphosphine, tributylphosphine, trioctylphosphine, etc.; phosphine compounds or their oxide compounds such as methylphosphine oxide, ethylphosphine oxide, propylphosphine oxide, butylphosphine oxide, pentylphosphine oxide, tributylphosphine oxide, octylphosphine oxide, dioctylphosphine oxide, trioctylphosphine oxide, etc.; diphenylphosphine, triphenylphosphine compounds or their oxide compounds; C5 to C20 alkyl phosphine acids such as hexylphosphine, octylphosphine, dodecanephosphine, tetradecanephosphine, hexadecanephosphine, octadecanphosphine, etc., and C5 to C20 alkyl phosphonic acids; etc., but are not limited thereto. Quantum dots may include a hydrophobic organic ligand alone or as a mixture of one or more. The hydrophobic organic ligand may not include photopolymerizable residues (e.g., acrylate groups, methacrylate groups, etc.).

[0102] A second capping layer (280) may be positioned on the transparent layer (520a), the first color conversion layer (520b), the second color conversion layer (520c), and the partition (265). The second capping layer (280) may also be positioned on the spacer (269). The second capping layer (280) may be positioned entirely on the second substrate (210). The second capping layer (280) is a layer that covers and protects the transparent layer (520a), the first color conversion layer (520b), and the second color conversion layer (520c), and may be made of an inorganic material. For example, the second capping layer (280) may include an inorganic insulating material such as silicon nitride (SiNx), silicon oxide (SiOx), or silicon nitrate (SiOxNy). The second capping layer (280) may be a single layer or a multilayer structure of the above material.

[0103] A filling layer (290) may be located between the display panel (1000) and the color conversion panel (2000) when the display panel (1000) and the color conversion panel (2000) are bonded together. The filling layer (290) may be located entirely on a flat surface.

[0104] As illustrated in FIG. 4, a display device according to one embodiment includes a display panel (1000) and a color conversion panel (2000) that overlap each other. A filling layer (290) may be located between the display panel (1000) and the color conversion panel (2000).

[0105] First, a stacked structure of a display panel (1000) in a peripheral area (PA) of a display device according to one embodiment will be described. The stacked structure of the display panel (1000) in the peripheral area (PA) is shown briefly.

[0106] The display panel (1000) may include a first substrate (110), a driving unit (501) located on one side of the first substrate (110), and an encapsulation layer (400) located on the first substrate (110) and the driving unit (501).

[0107] The driving unit (501) can supply a signal to drive a plurality of pixels located in the display area (DA). At this time, a voltage transmission line may be further located on the first substrate (110) to receive voltage from the driving unit (501) and transmit it to a signal line located in the display area (DA). The driving unit (501) and the voltage transmission line may include layers located in the same layer as the metal layer and semiconductor layer constituting the transistor, pixel electrode, etc. located in the display area (DA). Additionally, an insulating film may be located between the layers constituting the driving unit (501) and the voltage transmission line, and these insulating films may be located in the same layer as the gate insulating film (120), the first interlayer insulating film (160), the second interlayer insulating film (180), etc. located in the display area (DA). That is, the devices located in the peripheral area (PA) may be formed together in the process of forming the devices located in the display area (DA).

[0108] The encapsulation layer (400) may be located over most of the area on the first substrate (110). The encapsulation layer (400) may be located from the display area (DA) to the surrounding area (PA). However, the encapsulation layer (400) may not be located in some of the edge areas of the surrounding area (PA).

[0109] Next, a stacked structure of a color conversion panel (2000) in a peripheral area (PA) of a display device according to one embodiment will be described.

[0110] The color conversion panel (2000) includes a second substrate (210), a first color filter (230a), a second color filter (230b), a third color filter (230c), and a dummy partition (265a) located on one side of the second substrate (210).

[0111] In the surrounding area (PA), the first color filter (230a), the second color filter (230b), and the third color filter (230c) may overlap each other. The first color filter (230a) may be located directly above one side of the second substrate (210), the second color filter (230b) may be located above the first color filter (230a), and the third color filter (230c) may be located above the second color filter (230b). At this time, the second color filter (230b) may be located between the first color filter (230a) and the third color filter (230c). However, the stacking order of the first color filter (230a), the second color filter (230b), and the third color filter (230c) is not limited thereto and may be changed in various ways.

[0112] At least one of the first color filter (230a), the second color filter (230b), and the third color filter (230c) may include an opening (235a, 235b, 235c) located in the surrounding area (PA). A first opening (235a) may be formed in the first color filter (230a), a second opening (235b) may be formed in the second color filter (230b), and a third opening (235c) may be formed in the third color filter (230c). The widths of the first opening (235a), the second opening (235b), and the third opening (235c) may be different. The width (Th1) of the first opening (235a) may be narrower than the width (Th2) of the second opening (235b), and the width (Th2) of the second opening (235b) may be narrower than the width (Th3) of the third opening (235c). That is, the widths may gradually increase in the order of the first opening (235a), the second opening (235b), and the third opening (235c). At least a portion of the first opening (235a), the second opening (235b), and the third opening (235c) may overlap. The entirety of the first opening (235a) may overlap with the second opening (235b), and the entirety of the second opening (235b) may overlap with the third opening (235c). Accordingly, the first color filter (230a), the second color filter (230b), and the third color filter (230c) within the openings (235a, 235b, 235c) may be formed in a stepped manner.

[0113] The wavelengths that the first color filter (230a), the second color filter (230b), and the third color filter (230c) can each pass through may differ. In this case, the first color filter (230a), which includes the first opening (235a) with the narrowest width, may be selected as a color having a relatively high light-blocking rate. The third color filter (230c), which includes the third opening (235c) with the widest width, may be selected as a color having a relatively low light-blocking rate.

[0114] The widths of the first opening (235a), the second opening (235b), and the third opening (235c) described above may vary. For example, the width of the first opening (235a) may be the widest, and the width of the third opening (235c) may be the narrowest. Other variations may also occur.

[0115] A first capping layer (250) may be located on one side of the first color filter (230a), the second color filter (230b), and the third color filter (230c). The first capping layer (250) may be located entirely over the display area (DA) and the surrounding area (PA).

[0116] The dummy partition (265a) may overlap with the first color filter (230a), the second color filter (230b), and the third color filter (230c). The dummy partition (265a) may overlap with the color filters (230a, 230b, 230c) in a direction perpendicular to the second substrate (210). The dummy partition (265) may overlap with the first opening (235a), the second opening (235b), and the third opening (235c). The dummy partition (265) may be located within the first opening (235a), the second opening (235b), and the third opening (235c), and may completely fill the inside of the first opening (235a), the second opening (235b), and the third opening (235c). That is, the dummy partition (265) may be formed to cover all of the first opening (235a), the second opening (235b), and the third opening (235c). However, it is not limited thereto, and the dummy partition (265) may be formed to cover a portion of the openings (235a, 235b, 235c).

[0117] As the dummy partition (265a) overlaps with the openings (235a, 235b, 235c), the height of the dummy partition (265a) may vary depending on the location. The height of the portion of the dummy partition (265a) that overlaps with the openings (235a, 235b, 235c) may be lower than the height of the portion of the dummy partition (265a) that does not overlap with the openings (235a, 235b, 235c). In this case, the height of the dummy partition (265a) refers to the distance from the second substrate (210) to the surface of the dummy partition (265a) facing the first substrate (110). The height of the portion of the dummy partition (265a) adjacent to the sealing member (601) may be lower than the height of the portion of the dummy partition (265a) adjacent to the display area (DA). In Fig. 4, the left end is the part adjacent to the display area (DA), and the right end is the outer edge of the surrounding area (PA).

[0118] The dummy partition (265a) can be formed simultaneously with the partition (265) in the same process. Therefore, the dummy partition (265a) can be located in the same layer as the partition (265) and can contain the same material.

[0119] A dummy spacer (269a) may be positioned above the dummy bulkhead (265a). The dummy spacer (269a) may contain the same material as the dummy bulkhead (265a). However, it is not limited thereto, and the dummy spacer (269a) may be made of a different material from the dummy bulkhead (265a). The dummy spacer (269a) may contain a light-blocking material. For example, the dummy spacer (269a) may contain a black pigment.

[0120] The dummy spacer (269a) can be formed simultaneously with the spacer (269) in the same process. Therefore, the dummy spacer (269a) can be located in the same layer as the spacer (269) and can contain the same material.

[0121] A second capping layer (280) may be located on the dummy bulkhead (265). The second capping layer (280) may also be located on the dummy spacer (269a). The second capping layer (280) may be located entirely over the display area (DA) and the surrounding area (PA). At the edge of the display device, the second capping layer (280) may be located directly above the first capping layer (250).

[0122] In a state where the display panel (1000) and the color conversion panel (2000) are bonded together, a filling layer (290) and a sealing member (601) may be located between the display panel (1000) and the color conversion panel (2000).

[0123] The filling layer (290) can be positioned entirely on a flat surface. The filling layer (290) can be positioned in the display area (DA) and the surrounding area (PA). In the process of forming the filling layer (290), if the filling layer forming material is positioned between the display panel (1000) and the color conversion panel (2000) and then the bonding process is performed, the filling layer forming material can spread to the edge of the display device. Therefore, the filling layer (290) can be positioned mostly over the entire area of ​​the display device. However, the filling layer (290) may not overlap with the sealing member (601).

[0124] The sealing member (601) may be located at the outer edge of the peripheral area (PA) of the display device. The sealing member (601) may be formed in a shape that surrounds the display area (DA) on a plane. Thus, elements located within the display area (DA) may be surrounded and sealed by the sealing member (601). The display panel (1000) and the color conversion panel (2000) may be fixed in a bonded state by the sealing member (601). The sealing member (601) may be formed through a process of applying a sealing member forming material to the outer edge of the peripheral area (PA) between the first substrate (110) and the second substrate (210), and then curing it by irradiating UV light.

[0125] The color filters (230a, 230b, 230c) may be formed up to the outer edge of the peripheral area (PA) of the display device. The dummy partition (265a) may not be formed up to the outer edge of the peripheral area (PA) of the display device. Accordingly, the sealing member (601) may overlap with the color filters (230a, 230b, 230c) but may not overlap with the dummy partition (265a). The sealing member (601) may overlap with the first capping layer (250) and the second capping layer (280).

[0126] The thickness of the sealing member (601) and the thickness of the dummy partition (265a) may be similar. For example, the thickness of the sealing member (601) may be about 11 μm, and the thickness of the dummy partition (265a) may be about 10 μm. Accordingly, when the bonding process of the display panel (1000) and the color conversion panel (2000) is carried out, if the sealing layer (400) and the dummy partition (265a) come into contact at the edge of the display device, the sealing layer (400) and / or the dummy partition (265a) may be pressed. Accordingly, if the sealing layer (400) is broken or torn, gas from the filler may travel along the damaged part, and the light-emitting element located under the sealing layer (400) may be damaged. In a display device according to one embodiment, an opening (235a, 235b, 235c) is formed in a color filter (230a, 230b, 230c) located at the edge of a peripheral area (PA), and by positioning a dummy partition (265) within the opening (235a, 235b, 235c), the height of the dummy partition (265a) can be lowered. By forming the height of the dummy partition (265a) located at the edge of the peripheral area (PA) to be relatively low, the sealing layer (400) and the dummy partition (265a) can be prevented from being pressed during the bonding process of the display panel (1000) and the color conversion panel (2000), and the light-emitting element can be prevented from being damaged.

[0127] Although the city has been omitted, a dummy low-refractive-index layer may be additionally located in the peripheral area (PA) of the display device according to one embodiment. The dummy low-refractive-index layer may overlap with the first color filter (230a), the second color filter (230b), and the third color filter (230c), and may be formed to cover all of the first opening (235a), the second opening (235b), and the third opening (235c). The dummy low-refractive-index layer may be formed simultaneously in the same process as the low-refractive-index layer (240). Both the dummy low-refractive-index layer and the dummy partition (265a) may be formed, or only one of the dummy low-refractive-index layer and the dummy partition (265a) may be formed.

[0128] Next, referring to FIG. 5, a display device according to one embodiment is described as follows.

[0129] Since the display device according to the embodiment illustrated in FIG. 5 has a substantial number of parts identical to the display device according to the embodiments illustrated in FIG. 1 to 4, the description of the identical parts is omitted. This embodiment differs from the preceding embodiment in that the first opening is not formed, and this will be explained further below.

[0130] FIG. 5 is a cross-sectional view showing the peripheral area of ​​a display device according to one embodiment.

[0131] A display device according to one embodiment, similar to the preceding embodiment, includes a display panel (1000) and a color conversion panel (2000) facing each other, and a sealing member (601) located between the display panel (1000) and the color conversion panel (2000) and located at the outer edge of the peripheral area. The display panel (1000) may include a first substrate (110), a plurality of light-emitting elements located on one side of the first substrate (110), and an encapsulation layer (400) located on the plurality of light-emitting elements and located in a display area and a peripheral area. The color conversion panel (2000) may include a second substrate (210), a first color filter (230a), a second color filter (230b), a third color filter (230c), a partition, and a dummy partition (265a) located on one side of the second substrate (210). The light-emitting elements and the partition are located in the display area and are not illustrated in FIG. 5.

[0132] At least one of the first color filter (230a), the second color filter (230b), and the third color filter (230c) may include an opening (235b, 235c) located in a surrounding area, and a dummy partition (265a) may overlap with the opening (235b, 235c). In the preceding embodiment, an opening may be formed in all of the first color filter (230a), the second color filter (230b), and the third color filter (230c), and in the present embodiment, an opening may not be formed in the first color filter (230a). In the present embodiment, a second opening (235b) may be formed in the second color filter (230b), and a third opening (235c) may be formed in the third color filter (230c). The widths of the second opening (235b) and the third opening (235c) may be different. The width (Th2) of the second opening (235b) may be narrower than the width (Th3) of the third opening (235c). The second opening (235b) and the third opening (235c) may overlap at least partially. Thus, within the openings (235b, 235c), the first color filter (230a), the second color filter (230b), and the third color filter (230c) may be formed in a stepped manner.

[0133] The dummy partition (265a) may overlap with the first color filter (230a), the second color filter (230b), and the third color filter (230c). The dummy partition (265) may overlap with the second opening (235b) and the third opening (235c). The dummy partition (265) may be located within the second opening (235b) and the third opening (235c), and may fill the inside of the second opening (235b) and the third opening (235c).

[0134] As the dummy partition (265a) overlaps with the openings (235b, 235c), the height of the dummy partition (265a) may vary depending on the location. The height of the portion of the dummy partition (265a) adjacent to the sealing member (601) may be lower than the height of the portion of the dummy partition (265a) adjacent to the display area. By forming the height of the dummy partition (265a) located at the edge of the surrounding area to be relatively low, the sealing layer (400) and the dummy partition (265a) may be prevented from being pressed during the bonding process of the display panel (1000) and the color conversion panel (2000), and the light-emitting element may be prevented from being damaged.

[0135] Next, referring to FIG. 6, a display device according to one embodiment is described as follows.

[0136] Since the display device according to the embodiment illustrated in FIG. 6 has a substantial number of parts identical to the display device according to the embodiments illustrated in FIG. 1 to 4, the description of the identical parts is omitted. This embodiment differs from the preceding embodiment in that the first opening and the second opening are not formed, and this will be explained further below.

[0137] FIG. 6 is a cross-sectional view showing the peripheral area of ​​a display device according to one embodiment.

[0138] A display device according to one embodiment, similar to the preceding embodiment, includes a display panel (1000) and a color conversion panel (2000) facing each other, and a sealing member (601) located between the display panel (1000) and the color conversion panel (2000) and located at the outer edge of the peripheral area. The display panel (1000) may include a first substrate (110), a plurality of light-emitting elements located on one side of the first substrate (110), and an encapsulation layer (400) located on the plurality of light-emitting elements and located in a display area and a peripheral area. The color conversion panel (2000) may include a second substrate (210), a first color filter (230a), a second color filter (230b), a third color filter (230c), a partition, and a dummy partition (265a) located on one side of the second substrate (210). The light-emitting elements and the partition are located in the display area and are not illustrated in FIG. 6.

[0139] In the preceding embodiment, openings may be formed in all of the first color filter (230a), the second color filter (230b), and the third color filter (230c), and in the present embodiment, openings may not be formed in the first color filter (230a) and the second color filter (230b). In the present embodiment, a third opening (235c) may be formed in the third color filter (230c). The width (Th3) of the third opening (235c) can be appropriately adjusted. Within the openings (235b, 235c), the first color filter (230a), the second color filter (230b), and the third color filter (230c) may be formed in a stepped manner.

[0140] The dummy bulkhead (265a) may overlap with the first color filter (230a), the second color filter (230b), and the third color filter (230c). The dummy bulkhead (265) may overlap with the third opening (235c). The dummy bulkhead (265) may be located within the third opening (235c) and may fill the inside of the third opening (235c).

[0141] As the dummy partition (265a) overlaps with the third opening (235c), the height of the dummy partition (265a) may vary depending on the location. The height of the portion of the dummy partition (265a) adjacent to the sealing member (601) may be lower than the height of the portion of the dummy partition (265a) adjacent to the display area. By forming the height of the dummy partition (265a) located at the edge of the surrounding area to be relatively low, the sealing layer (400) and the dummy partition (265a) may be prevented from being pressed during the bonding process of the display panel (1000) and the color conversion panel (2000), and the light-emitting element may be prevented from being damaged.

[0142] Next, referring to FIG. 7, a display device according to one embodiment is described as follows.

[0143] Since the display device according to the embodiment illustrated in FIG. 7 has a significant number of parts identical to the display device according to the embodiments illustrated in FIG. 1 to 4, the description of the identical parts is omitted. This embodiment differs from the preceding embodiment in that the dummy spacer overlaps with the opening, which will be explained further below.

[0144] FIG. 7 is a cross-sectional view showing the peripheral area of ​​a display device according to one embodiment.

[0145] A display device according to one embodiment, similar to the preceding embodiment, includes a display panel (1000) and a color conversion panel (2000) facing each other, and a sealing member (601) located between the display panel (1000) and the color conversion panel (2000) and located at the outer edge of the peripheral area. The display panel (1000) may include a first substrate (110), a plurality of light-emitting elements located on one side of the first substrate (110), and an encapsulation layer (400) located on the plurality of light-emitting elements and located in a display area and a peripheral area. The color conversion panel (2000) may include a second substrate (210), a first color filter (230a), a second color filter (230b), a third color filter (230c), a partition, and a dummy partition (265a) located on one side of the second substrate (210). The light-emitting elements and the partition are located in the display area and are not illustrated in FIG. 7.

[0146] A dummy spacer (268a) may be positioned on the dummy bulkhead (265a). In the preceding embodiment, the dummy spacer (269a) may not overlap with the openings (235a, 235b, 235c), and in the present embodiment, the dummy spacer (269a) may overlap with the openings (235a, 235b, 235c). The dummy spacer (269a) may also overlap with the sealing member (601). However, it is not limited thereto, and the dummy spacer (269a) may not overlap with the sealing member (601).

[0147] The dummy spacer (269a) may include a light-blocking material. For example, the dummy spacer (269a) may include a black pigment. By overlapping the dummy spacer (269a) containing the light-blocking material with the openings (235a, 235b, 235c), light leakage can be prevented in the color filter (230a, 230b, 230c) in the area where the openings (235a, 235b, 235c) are formed.

[0148] Although embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements by those skilled in the art using the basic concept of the present invention as defined in the following claims also fall within the scope of the present invention. Explanation of the symbols

[0149] 110: First substrate 210: Second substrate 230a: 1st color filter 230b: Second color filter 230c: Third color filter 235a: First opening 235b: Second opening 235c: Third opening 290: Packing layer 400: Bag layer 1000: Display panel 2000: Color Conversion Panel ED: Light-emitting element

Claims

Claim 1 A display panel and a color conversion panel facing each other and including a display area and a peripheral area, and a sealing member located between the display panel and the color conversion panel and located at the outer edge of the peripheral area, wherein the display panel includes a first substrate, a plurality of light-emitting elements located on one side of the first substrate, and an encapsulation layer located on the plurality of light-emitting elements and located in the display area and the peripheral area, wherein the color conversion panel includes a second substrate, a first color filter, a second color filter, and a third color filter located on one side of the second substrate and located in the display area and the peripheral area, and a partition and a dummy partition located on the first color filter, the second color filter, and the third color filter, wherein in the peripheral area, the first color filter, the second color filter, and the third color filter overlap each other on the second substrate, and at least two of the first color filter, the second color filter, and the third color filter located in the peripheral area and overlapping each other include openings having different widths and overlapping each other to form a stepped shape, and the dummy A display device in which a partition wall overlaps with the openings, and the dummy partition wall overlapping with the openings has a first surface facing the second substrate and a second surface opposite to the first surface, and the second surface has a height that gradually decreases from the second substrate along the stepped shape of the openings as it approaches the edge of the second substrate in the portion overlapping with the openings, and the distance between the second surface and the encapsulation layer also gradually increases along the stepped shape of the openings as it approaches the edge of the second substrate. Claim 2 In claim 1, the above bulkhead is located in the above-mentioned display area and the above-mentioned dummy bulkhead is located in the above-mentioned surrounding area, a display device. Claim 3 A display device according to paragraph 2, wherein in the display area the partition wall overlaps with the first color filter, the second color filter, and the third color filter, and in the surrounding area the dummy partition wall overlaps with the first color filter, the second color filter, and the third color filter. Claim 4 A display device according to claim 1, wherein the openings include a first opening formed in the first color filter, a second opening formed in the second color filter, and a third opening formed in the third color filter. Claim 5 In paragraph 4, a display device in which the widths of the first opening, the second opening, and the third opening are different. Claim 6 In paragraph 4, the first opening, the second opening, and the third opening are a display device in which at least a portion of them overlap each other. Claim 7 In paragraph 4, the first color filter, the second color filter, and the third color filter within the opening are formed in a stepped manner in a display device. Claim 8 A display device according to claim 1, wherein the openings include a second opening formed in the second color filter and a third opening formed in the third color filter, and no opening is formed in the first color filter in the surrounding area. Claim 9 delete Claim 10 A display device in which, in claim 1, the height of the second surface of the portion of the dummy bulkhead that overlaps with the openings is lower than the height of the second surface of the portion of the dummy bulkhead that does not overlap with the openings. Claim 11 A display device according to claim 1, wherein the height of the second surface of the portion of the dummy bulkhead adjacent to the sealing member is lower than the height of the second surface of the portion of the dummy bulkhead adjacent to the display area. Claim 12 A display device according to claim 1, further comprising a spacer positioned above the bulkhead. Claim 13 In paragraph 12, a display device further comprising a dummy spacer positioned above the dummy bulkhead. Claim 14 In paragraph 13, the dummy spacer comprises a light-blocking material and is a display device overlapping with the opening. Claim 15 A display device according to claim 1, further comprising a first color conversion layer, a second color conversion layer, and a transmission layer located in the display area and surrounded by the above partition, wherein the first color conversion layer overlaps with the first color filter, the second color conversion layer overlaps with the second color filter, and the transmission layer overlaps with the third color filter. Claim 16 In claim 1, the dummy bulkhead is a display device comprising a portion located within the openings. Claim 17 In paragraph 16, the dummy bulkhead is a marking device that completely fills the openings. Claim 18 A second substrate including a display area and a peripheral area; a first color filter, a second color filter, and a third color filter located on one side of the second substrate; and a partition located on the first color filter, the second color filter, and the third color filter, wherein in the peripheral area, the first color filter, the second color filter, and the third color filter overlap each other on the second substrate, and at least two of the first color filter, the second color filter, and the third color filter are located in the peripheral area and have different widths and overlap each other to form a stepped outer opening, wherein the partition overlaps the outer openings, and the partition overlapping the outer openings has a first surface facing the second substrate and a second surface opposite to the first surface, wherein the second surface has a height such that the outer openings gradually decrease from the second substrate along the stepped shape as they approach the edge of the second substrate in the portion overlapping the outer openings, and the partition is within the outer openings Embedded color conversion panel. Claim 19 In paragraph 18, the first color filter, the second color filter, and the third color filter are patterned in the display area such that the first color filter, the second color filter, and the third color filter do not overlap in the color conversion panel. Claim 20 A color conversion panel according to claim 19, further comprising a color conversion layer located between the partitions and overlapping the non-overlapping portions of the first color filter, the second color filter, and the third color filter.

Images