Display device

Abstract

A display device includes a plurality of pixels including a first pixel row and a second pixel row adjacent to each other along a first direction, the first pixels being repeatedly arranged in the first pixel row in a second direction perpendicular to the first direction, and the second pixels being repeatedly arranged in the second direction. The first pixel comprises a first group of a first plurality of sub-pixels; the second pixel row is shifted relative to the first pixel row by a first distance in the second direction, and the first distance is less than or equal to half a size of any one of the first plurality of sub-pixels in the second direction.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to and the benefit of Korean Patent Application No. 10-2023-0004925 filed in the Korean Intellectual Property Office on January 12, 2023, the contents of which are incorporated herein by reference in their entirety. Technical Field

[0003] An aspect of one or more embodiments relates to a display device. Background Art

[0004] The display device is a device configured to visually display an image based on data. The display device may include a substrate divided into a display area and a peripheral area. The display area may include scan lines and data lines insulated from each other and a plurality of pixels. In addition, the display area may include one or more thin film transistors and sub-pixel electrodes electrically connected to the one or more thin film transistors to correspond to each of the plurality of pixels. In addition, a pair of electrodes provided in common in a plurality of pixels may be provided in the display area. Various wirings, scan drivers, data drivers, controllers, and pad portions configured to transmit electrical signals to the display area may be provided in the peripheral area.

[0005] As time goes by, various uses of such display devices continue to expand. Therefore, various designs are proposed to improve the quality of the display devices.

[0006] The above information disclosed in this technical background section is only for enhancement of background understanding and therefore, the information discussed in this technical background section does not necessarily constitute prior art. Utility Model Content

[0007] Aspects of one or more embodiments include a display device that can relatively improve resolution and can achieve relatively high-quality images and a method of manufacturing a display device. However, this is only an example, and the scope of the embodiments according to the present disclosure is not limited thereto.

[0008] Additional aspects will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the presented embodiments of the disclosure.

[0009] According to some embodiments of the present disclosure, a display device includes multiple pixels and is configured to display an image, wherein the multiple pixels include a first pixel row and a second pixel row adjacent to each other along a first direction, first pixels are repeatedly arranged in the first pixel row in a second direction perpendicular to the first direction, and the first pixels include a first group of a first plurality of sub-pixels; the second pixel row is shifted a first distance relative to the first pixel row in the second direction, and the first distance is less than or equal to half of a size of any one of the multiple sub-pixels in the second direction.

[0010] According to some embodiments, the second pixel can be repeatedly arranged in the second pixel row in the second direction, the second pixel includes a second group of a second plurality of sub-pixels, and the arrangement of the first plurality of sub-pixels of the first pixel can be the same as the arrangement of the second plurality of sub-pixels of the second pixel.

[0011] According to some embodiments, a 1-1 subpixel configured to emit a first color among the first plurality of subpixels of the first pixel may partially overlap a 2-1 subpixel configured to emit the first color among the second plurality of subpixels of the second pixel in the first direction.

[0012] According to some embodiments, the 2-1 sub-pixel may be shifted in the second direction relative to the 1-1 sub-pixel by the first distance.

[0013] According to some embodiments, the multiple pixels may include n pixel rows (where n is a natural number equal to or greater than 2), the n pixel rows include the first pixel row and the second pixel row and are arranged along the first direction, and each of the n pixel rows can be shifted in the second direction relative to the first pixel row by an integer multiple of the first distance.

[0014] According to some embodiments, the n pixel rows may be repeatedly arranged along the first direction.

[0015] According to some embodiments, even-numbered pixel rows among the n pixel rows may be shifted by the first distance in the second direction relative to odd-numbered pixel rows.

[0016] According to some embodiments, the display panel may include an emission panel and a color panel, and the color panel may include: a dam in which openings corresponding to emission regions of the plurality of pixels are provided; and a quantum dot layer filling the openings of the dam.

[0017] According to some embodiments, the emission panel may include: a pixel electrode; a pixel defining film, in which an opening is provided to expose a portion of the pixel electrode and corresponds to the emission area of ​​the plurality of pixels; and an emission layer filling the opening of the pixel defining film.

[0018] According to some embodiments of the present disclosure, in a method for manufacturing a display device including an emission panel and a color panel, a method for forming a color panel may include forming a dam having an opening formed therein on a substrate in a specific pixel arrangement and providing droplets into the substrate having the dam formed therein, and the pixel arrangement may include a first pixel row and a second pixel row adjacent to each other in a first direction, wherein first pixels provided as a group of a first plurality of sub-pixels may be repeatedly arranged in the first pixel row in a second direction perpendicular to the first direction, the second pixel row may be shifted a first distance relative to the first pixel row in the second direction, and the first distance is less than or equal to half of a size of any one of the plurality of sub-pixels in the second direction.

[0019] According to some embodiments, a second pixel provided as a group of multiple sub-pixels may be repeatedly arranged in the second pixel row in the second direction, and the arrangement of the multiple sub-pixels provided in the first pixel may be the same as the arrangement of the multiple sub-pixels provided in the second pixel.

[0020] According to some embodiments, a 1-1 sub-pixel configured to emit a first color among the multiple sub-pixels provided in the first pixel may partially overlap with a 2-1 sub-pixel configured to emit the first color among the multiple sub-pixels provided in the second sub-pixel in the first direction.

[0021] According to some embodiments, the 2-1 sub-pixel may be shifted in the second direction relative to the 1-1 sub-pixel by the first distance.

[0022] According to some embodiments, the providing of the droplets into the substrate having the bank formed thereon may include discharging the droplets into the openings of the bank according to the pixel arrangement through a plurality of nozzles while moving the substrate in the first direction.

[0023] According to some embodiments, the first distance may be an integer multiple of the distance between the plurality of nozzles.

[0024] According to some embodiments, among the plurality of nozzles, a nozzle configured to discharge the liquid droplet to the 1-1 sub-pixel may be at least partially different from a nozzle configured to discharge the liquid droplet to the 2-1 sub-pixel.

[0025] According to some embodiments, the pixel arrangement may include n pixel rows (where n is a natural number equal to or greater than 2), the n pixel rows including the first pixel row and the second pixel row and arranged in the first direction, and each of the n pixel rows may be shifted in the second direction relative to the first pixel row by an integer multiple of the first distance.

[0026] According to some embodiments, in the pixel arrangement, the n pixel rows may be repeatedly arranged in the first direction.

[0027] According to some embodiments, in the pixel arrangement, even-numbered pixel rows among the n pixel rows may be shifted by the first distance in the second direction relative to odd-numbered pixel rows.

[0028] According to some embodiments, the method may further include arranging the color panel on the emission panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The above and other aspects, features and characteristics of certain embodiments of the present disclosure will become more apparent from the following description in conjunction with the accompanying drawings, in which:

[0030] Figure 1 is a perspective view schematically showing a display device according to some embodiments;

[0031] Figure 2 is a cross-sectional view schematically showing a display device according to some embodiments;

[0032] Figure 3 is schematically shown in Figure 2 A cross-sectional view of the first quantum dot layer, the second quantum dot layer, and the light transmission layer shown in FIG.

[0033] Figure 4 is a cross-sectional view schematically showing a display device according to some embodiments;

[0034] Figure 5 is a top plan view schematically illustrating a portion of a display device according to some embodiments;

[0035] Figure 6 is a cross-sectional view schematically showing a display device according to some embodiments;

[0036] Figure 7 is a top plan view schematically illustrating a display device according to some embodiments;

[0037] Figure 8 is a top plan view schematically illustrating a display device according to some embodiments;

[0038] Fig. 9 is a cross-sectional view schematically showing a manufacturing apparatus for a display device according to some embodiments;

[0039] Fig.10 is a top plan view schematically illustrating a method of manufacturing a display device according to some embodiments;

[0040] Fig.11 is included according to the location shown Fig.10 A top plan view of the brightness of the third sub-pixel in each pixel shown in ;

[0041] Fig. 12A is a top plan view schematically showing a display device according to a comparative example; and

[0042] Fig. 12B is included according to the location shown Fig. 12A 0 is a top plan view of the brightness of the third sub-pixel in each pixel shown in . DETAILED DESCRIPTION

[0043] Reference will now be made in more detail to aspects of some embodiments shown in the accompanying drawings, in which the same reference numerals always refer to the same elements. In this regard, the embodiments presented may have different forms and should not be construed as being limited to the descriptions set forth herein. Therefore, embodiments are described below only by reference to the accompanying drawings to illustrate aspects of this specification. As used herein, the term "and / or" includes any and all combinations of one or more related listed items. Throughout this disclosure, the expression "at least one of a, b, and c" means only a, only b, only c, both a and b, both a and c, both b and c, all of a, b, and c, or variations thereof.

[0044] As used herein, terms such as “first”, “second”, are used to distinguish one component from another component, but not in a limiting sense.

[0045] As used herein, unless clearly defined otherwise, a singular form also includes a plural form.

[0046] As used herein, terms such as “include” or “comprising” indicate the presence of features or components stated in the specification, and do not exclude the possibility of one or more additional features or components.

[0047] As used herein, when a portion such as a film, region, or component is on or over another portion, the portion may be directly on or over the other portion, and other films, regions, or components may be located between the portion and the other portion.

[0048] In this specification, when it is mentioned that a film, region, and component are connected to another film, region, and component, the film, region, and component may be directly connected to another film, region, and component, or the film, region, and component may be indirectly connected to another film, region, and component, with another film, region, and component between them. For example, when it is mentioned that a film, region, and component are electrically connected to another film, region, and component, the film, region, and component may be directly electrically connected to another film, region, and component, or the film, region, and component may be indirectly electrically connected to another film, region, and component, with another film, region, and component between them.

[0049] In the present specification, "A and / or B" means A, B, or A and B. "At least one of A and B" means A, B, or A and B.

[0050] As used herein, the x-axis, y-axis, and z-axis are not limited to the three axes in the orthogonal coordinate system and can be interpreted as a broader meaning. For example, the x-axis, y-axis, and z-axis can be orthogonal to each other, but can also represent different directions that are not orthogonal to each other.

[0051] In this specification, when a specific embodiment can be implemented differently, the specific process order may be performed differently from the described order. For example, two consecutively described processes may be performed substantially simultaneously, or in the reverse order of the described order.

[0052] For convenience of explanation, the sizes of components in the drawings may be exaggerated. For example, since the sizes and thicknesses are arbitrarily shown for convenience of explanation, the embodiments are not limited to the drawings.

[0053] Figure 1 is a perspective view schematically showing a display device 1 according to some embodiments; Figure 2 is a cross-sectional view schematically showing a display device 1 according to some embodiments; and Figure 3 is schematically shown in Figure 2 0046] A cross-sectional view of the first quantum dot layer 561, the second quantum dot layer 563, and the light transmission layer 565 shown in FIG. Figure 2 Along with Figure 1 The cross-sectional view shown in FIG. 1 corresponds to the cross-sectional view taken along the line II′.

[0054] Reference Figure 1 The display device 1 may include a display area DA and a non-display area NDA surrounding the display area DA (e.g., at the periphery of the display area DA or outside the footprint of the display area DA). The display device 1 may provide or display an image through an array of a plurality of pixels two-dimensionally arranged in the display area DA.

[0055] Each pixel in the display device 1 includes an area in which light having a specific color can be emitted, and the display device 1 can use the light emitted from the pixel to provide or display an image. Each pixel may include multiple sub-pixels. Each of the multiple sub-pixels may emit red light, green light, or blue light.

[0056] The non-display area NDA (which is an area where no image is provided or displayed) may completely surround the display area DA (e.g., at the periphery of the display area DA or outside the footprint of the display area DA). A driver or main power line configured to provide an electrical signal or power to the pixel circuit may be arranged in the non-display area NDA. The non-display area NDA may include a pad, i.e., an element to which an electronic device or a printed circuit board may be electrically connected.

[0057] like Figure 1 As shown in , the display area DA may have a polygonal shape including a square. For example, the display area DA may have a rectangular shape in which the horizontal length is greater than the vertical length, a rectangular shape in which the horizontal length is less than the vertical length, or a square shape. Alternatively, the display area DA may have various shapes (e.g., an elliptical shape or a circular shape).

[0058] According to some embodiments, the display device 1 may include a light emitting panel 10 and a color panel 20 stacked in a thickness direction (eg, z direction). Figure 2 , the light emitting panel 10 may include first, second, and third light emitting devices OLED1, OLED2, and OLED3 on a lower substrate 100. Here, the first, second, and third light emitting devices OLED1, OLED2, and OLED3 may include organic light emitting diodes.

[0059] Light (eg, blue light Lb) emitted from the first, second, and third light emitting devices OLED1, OLED2, and OLED3 may be converted into red light Lr, green light Lg, or blue light Lb or transmitted while passing through the color panel 20.

[0060] According to some embodiments, a pixel defining film 120 defining an emission region of each of the first light emitting device OLED1, the second light emitting device OLED2, and the third light emitting device OLED3 may be located on the lower substrate 100. That is, the pixel defining film 120 may include an opening 120OP corresponding to an emission region of each of the first light emitting device OLED1, the second light emitting device OLED2, and the third light emitting device OLED3.

[0061] According to some embodiments, the pixel defining film 120 may include an organic insulating material. Alternatively, the pixel defining film 120 may include an organic insulating material such as silicon nitride (SiN x), silicon oxynitride (SiO x N y ) or silicon oxide (SiO x ) inorganic insulating material. Alternatively, the pixel defining film 120 may include an organic insulating material and an inorganic insulating material. According to some embodiments, the pixel defining film 120 may include a black film including a light-shielding material. The light-shielding material may include carbon black, carbon nanotubes, a resin or paste containing a black dye, metal (e.g., nickel, aluminum, molybdenum, and alloys thereof) particles, metal oxide (e.g., chromium oxide) particles, or metal nitride (e.g., chromium nitride) particles. When the pixel defining film 120 includes a light-shielding material, the reflection of external light caused by the metal structure located below the pixel defining film 120 can be relatively reduced.

[0062] According to some embodiments, the spacer may be on the pixel defining film 120. The spacer may include an organic insulating material such as polyimide. Alternatively, the spacer may include an organic insulating material such as SiN x or SiO x of inorganic insulating materials, or may include organic insulating materials and inorganic insulating materials.

[0063] According to some embodiments, the spacer may include the same material as that of the pixel defining film 120. In this case, the pixel defining film 120 and the spacer may be formed together in a mask process using a half-tone mask, etc. According to some embodiments, the spacer and the pixel defining film 120 may include different materials, respectively.

[0064] According to some embodiments, the filler 400 may be between the lower substrate 100 and the upper substrate 600. The filler 400 may have a buffering function for external pressure, etc. The filler 400 may include organic materials such as methyl silicon, phenyl silicon, and polyimide. However, the filler 400 is not limited thereto, and may also include an organic sealant such as a urethane-based resin, an epoxy-based resin, an acrylic-based resin, or silicon as an inorganic sealant.

[0065] According to some embodiments, the bank 500 may be located on the filler 400. The bank 500 may include various materials capable of absorbing light. The bank 500 may include a material that is the same as or different from that of the pixel defining film 120. For example, the bank 500 may include an opaque inorganic insulating material such as chromium oxide or molybdenum oxide or an opaque organic insulating material such as black resin.

[0066] According to some embodiments, the bank 500 may include openings 500OP corresponding to emission regions of the first light emitting device OLED1, the second light emitting device OLED2, and the third light emitting device OLED3, respectively. For example, the opening 500OP defined in the bank 500 may correspond to the opening 120OP defined in the pixel defining film 120. According to some embodiments, the first quantum dot layer 561, the second quantum dot layer 563, and the light transmission layer 565 may be respectively in the opening 500OP defined in the bank 500.

[0067] Reference Figure 2 and Figure 3 , the first quantum dot layer 561 may convert the incident blue light Lb into red light Lr. The first quantum dot layer 561 may include first quantum dots 1152, first scatterers 1153, and first photosensitive polymer 1151. The first quantum dots 1152 and the first scatterers 1153 may be dispersed in the first photosensitive polymer 1151.

[0068] The first quantum dots 1152 may be excited by the blue light Lb and isotropically emit red light Lr having a longer wavelength than the blue light Lb. The first photosensitive polymer 1151 may include an organic material having transmittance. The first scatterer 1153 may improve the color conversion efficiency by scattering the blue light Lb that is not absorbed by the first quantum dots 1152 to have a larger number of excited first quantum dots 1152. The first scatterer 1153 may include, for example, titanium oxide (TiO 2 ) or metal particles. The first quantum dots 1152 may be selected from II-VI group compounds, III-V group compounds, IV-VI group compounds, IV group elements, IV group compounds, and combinations thereof.

[0069] According to some embodiments, the first quantum dot layer 561 may convert light in the third wavelength band into light in the first wavelength band. For example, when the first light emitting device OLED1 generates light having a wavelength from 450nm to 495nm, the first quantum dot layer 561 may convert the light into light having a wavelength from 630nm to 780nm. Therefore, through the first sub-pixel PXa, light having a wavelength from 630nm to 780nm may be emitted outward through the upper substrate 600.

[0070] According to some embodiments, the second quantum dot layer 563 may include second quantum dots 1162, second scatterers 1163, and second photosensitive polymers 1161. The second quantum dots 1162 and the second scatterers 1163 may be dispersed in the second photosensitive polymers 1161. The second quantum dots 1162 may be excited by the blue light Lb and isotropically emit green light Lg having a wavelength longer than that of the blue light Lb. The second photosensitive polymers 1161 may include an organic material having a transmittance. The second scatterers 1163 may improve the color conversion efficiency by scattering the blue light Lb that is not absorbed by the second quantum dots 1162 to have a larger number of excited second quantum dots 1162. The second scatterers 1163 may include, for example, TiO 2 or metal particles. The second quantum dot 1162 may be selected from II-IV compounds, III-V compounds, IV-VI compounds, IV elements, IV compounds, and combinations thereof. In some embodiments, the second quantum dot 1162 may include the same material as the first quantum dot 1152, and in this case, the size of the second quantum dot 1162 may be smaller than the size of the first quantum dot 1152.

[0071] According to some embodiments, the second quantum dot layer 563 may convert light in the third wavelength band into light in the second wavelength band. For example, when the second light emitting device OLED2 generates light having a wavelength from 450nm to 495nm, the second quantum dot layer 563 may convert the light into light having a wavelength from 495nm to 570nm. Therefore, by virtue of the second sub-pixel PXb, light having a wavelength from 495nm to 570nm may be emitted outwardly through the upper substrate 600.

[0072] The blue light Lb may be transmitted through the light transmission layer 565. The light transmission layer 565 may include a third scatterer 1173 and a third photosensitive polymer 1171. The third scatterer 1173 may be dispersed in the third photosensitive polymer 1171. The third photosensitive polymer 1171 may include, for example, an organic material having light transmittance (e.g., silicone or epoxy), and may include the same material as that included in the first photosensitive polymer 1151 or the second photosensitive polymer 1161. The third scatterer 1173 may be emitted by scattering the blue light Lb, and may include the same material as that included in the first scatterer 1153 and the second scatterer 1163 described above.

[0073] According to some embodiments, the first quantum dot layer 561 , the second quantum dot layer 563 , and the light transmission layer 565 may be respectively formed in the opening 500OP of the bank 500 by an inkjet printing method.

[0074] According to some embodiments, the upper substrate 600 may be located on the first quantum dot layer 561, the second quantum dot layer 563, and the light transmission layer 565. The first color filter layer 581 (see Figure 6 ) may be located between the first quantum dot layer 561 and the upper substrate 600, and the second color filter layer 583 (see Figure 6 ) may be located between the second quantum dot layer 563 and the upper substrate 600, and the third color filter layer 585 (see Figure 6 ) may be located between the light transmission layer 565 and the upper substrate 600. Figure 6 Describe them in further detail.

[0075] The lower substrate 100 and the upper substrate 600 may each include glass, metal or polymer resin. When the lower substrate 100 and the upper substrate 600 are flexible or bendable, the lower substrate 100 and the upper substrate 600 may each include a polymer resin such as polyethersulfone, polyacrylate, polyetherimide, polyethylene naphthalate, polyethylene terephthalate, polyphenylene sulfide, polyarylate, polyimide, polycarbonate or cellulose acetate propionate. The lower substrate 100 and the upper substrate 600 may be variously modified, for example, may have a multilayer structure including two layers including the aforementioned polymer material and a barrier layer between the two layers, the barrier layer including an inorganic material, such as silicon nitride (SiN x ), silicon oxynitride (SiO x N y ) and silicon oxide (SiO x )wait.

[0076] According to some embodiments, the display device 1 can be formed by a process including the following steps: forming a first light-emitting device OLED1, a second light-emitting device OLED2 and a third light-emitting device OLED3 on a lower substrate 100; forming a first quantum dot layer 561, a second quantum dot layer 563 and a light-transmitting layer 565 on an upper substrate 600; and joining the lower substrate 100 on which the first light-emitting device OLED1, the second light-emitting device OLED2 and the third light-emitting device OLED3 are formed to the upper substrate 600 on which the first quantum dot layer 561, the second quantum dot layer 563 and the light-transmitting layer 565 are formed.

[0077] Figure 4 is a cross-sectional view schematically illustrating a display device 1 according to some embodiments.

[0078] Reference Figure 4 The thin film transistor TFT, the light emitting device OLED and the thin film encapsulation layer 300 may be located on the lower substrate 100. The buffer layer 111 may be located on the lower substrate 100. The buffer layer 111 may include a SiN x 、SiO x N y and SiOx The buffer layer 111 may be located on the lower substrate 100 to enhance the smoothness of the top surface of the lower substrate 100 or to prevent, reduce or minimize the penetration of impurities or contaminants from the lower substrate 100 or the like into the semiconductor layer A of the thin film transistor TFT.

[0079] The thin film transistor TFT may be located on the buffer layer 111. The thin film transistor TFT may include a semiconductor layer A, a gate electrode G, a source electrode S, and a drain electrode D. The semiconductor layer A may be located on the buffer layer 111. The semiconductor layer A may include amorphous silicon, polycrystalline silicon, an organic semiconductor material, or an oxide semiconductor material.

[0080] The first insulating layer 113 may be located on the semiconductor layer A. The first insulating layer 113 may include, for example, SiN x 、SiO x N y and SiO x The first insulating layer 113 may be between the semiconductor layer A and the gate electrode G, and ensures insulation between the semiconductor layer A and the gate electrode G.

[0081] The gate electrode G may be located on the first insulating layer 113. The gate electrode G may include a low resistance conductive material such as molybdenum (Mo), aluminum (Al), copper (Cu), and / or titanium (Ti), and may include a single layer or multiple layers including the above materials.

[0082] The second insulating layer 115 may be located on the gate electrode G. The second insulating layer 115 may include a layer such as SiN x 、SiO x N y and SiO x and inorganic materials, and may include a single layer or multiple layers containing the above materials.

[0083] The source electrode S and the drain electrode D may be located on the second insulating layer 115. The source electrode S and the drain electrode D may include at least one material selected from the group consisting of Cu, Ti, and Al. For example, the source electrode S and the drain electrode D may each have a three-layer structure including a titanium layer, an aluminum layer, and a titanium layer.

[0084] The planarization layer 117 may be located on the source electrode S and the drain electrode D. The planarization layer 117 may include a single polyimide-based resin layer. However, the embodiments according to the present disclosure are not limited thereto. Alternatively, the planarization layer 117 may include at least one of an acrylic-based resin, a methacrylate-based resin, polyisoprene, a vinyl resin, an epoxy-based resin, a urethane-based resin, a cellulose-based resin, a siloxane-based resin, a polyamide-based resin, and a perylene-based resin.

[0085] The light emitting device OLED may be located on the planarization layer 117. The light emitting device OLED may include a pixel electrode 210, an intermediate layer 220, and a counter electrode 230. The pixel electrode 210 may be located on the planarization layer 117. The pixel electrode 210 may be electrically connected to the source electrode S and / or the drain electrode D through a via hole defined in the planarization layer 117. Therefore, the light emitting device OLED may be electrically connected to the thin film transistor TFT.

[0086] The pixel electrode 210 may include indium tin oxide (ITO), indium zinc oxide (IZO), zinc oxide (ZnO), indium oxide (In 2 O 3 ), indium gallium oxide (IGO) or aluminum zinc oxide (AZO). According to some embodiments, the pixel electrode 210 may include a reflective film containing silver (Ag), magnesium (Mg), aluminum (Al), platinum (Pt), palladium (Pd), gold (Au), nickel (Ni), neodymium (Nd), iridium (Ir), chromium (Cr) or a combination thereof. According to some embodiments, the pixel electrode 210 may also include a conductive oxide material containing ITO, IZO, ZnO or In below / above the aforementioned reflective film. 2 O 3 For example, the pixel electrode 210 may include a multi-layer structure including ITO / Ag / ITO.

[0087] The pixel defining film 120 may be located on the pixel electrode 210. The pixel defining film 120 has an opening 120OP exposing at least a portion of the pixel electrode 210. The opening 120OP defined in the pixel defining film 120 may define an emission area EA of light emitted from the light emitting device OLED. For example, the width of the opening 120OP defined in the pixel defining film 120 may correspond to the width of the emission area EA. The peripheral area of ​​the emission area EA is a non-emission area that may surround the emission area EA.

[0088] The intermediate layer 220 including the emission layer may be located on the pixel electrode 210. The intermediate layer 220 may include a low molecular weight material or a high molecular weight material. When the intermediate layer 220 includes a low molecular weight material, the intermediate layer 220 may include a structure in which a hole injection layer (HIL), a hole transport layer (HTL), an emission layer (EML), an electron transport layer (ETL), and an electron injection layer (EIL) are stacked in a single or complex structure, and may be formed by a vacuum deposition method. When the intermediate layer 220 includes a high molecular weight material, the intermediate layer 220 may include a structure including HTL and EML. In this case, the HTL may include PEDOT, and the EML may include a high molecular weight material such as a polyparaphenylene vinylene (PPV)-based material and a polyfluorene-based material. The intermediate layer 220 is not limited thereto, and may have various structures. The intermediate layer 220 may be formed by a screen printing method, an inkjet printing method, a deposition method, or a laser induced thermal imaging (LITI) method, etc.

[0089] According to some embodiments, the intermediate layer 220 may include an emission layer that can emit light in a third band. For example, the emission layer may emit light having a wavelength from 450nm to 495nm. The emission layer may be formed integrally to completely cover the lower substrate 100. However, embodiments of the present disclosure are not limited thereto. The emission layer may be patterned for each pixel to correspond to the opening 120OP of the pixel defining film 120. According to some embodiments, the emission layer may be formed in the opening 120OP of the pixel defining film 120 by an inkjet printing method.

[0090] The counter electrode 230 may be located on the intermediate layer 220. The counter electrode 230 may include a conductive material having a small work function. For example, the counter electrode 230 may include a (semi) transparent layer including Ag, Mg, Al, Pt, Pd, Au, Ni, Nd, Ir, Cr, Li, Ca, or an alloy thereof. Alternatively, the counter electrode 230 may also include a (semi) transparent layer including ITO, IZO, ZnO, or In on the (semi) transparent layer including the aforementioned materials. 2 O 3 layer.

[0091] According to some embodiments, a capping layer may be further located on the counter electrode 230. The capping layer may include an inorganic material such as lithium fluoride (LiF) or / and an organic material.

[0092] The light emitting device may be easily damaged due to external moisture or oxygen, and therefore, the encapsulation layer may cover and protect the light emitting device as needed. The encapsulation layer may be provided as a thin film encapsulation layer 300 including at least one inorganic film layer and at least one organic film layer. Here, the thin film encapsulation layer 300 may include a first inorganic film layer 310, an organic film layer 320, and a second inorganic film layer 330 stacked sequentially.

[0093] The first inorganic film layer 310 may be directly located on the counter electrode 230. The first inorganic film layer 310 may prevent, reduce or minimize penetration of foreign contaminants, moisture or oxygen into the light emitting device OLED.

[0094] The organic film layer 320 may be directly located on the first inorganic film layer 310. The organic film layer 320 may provide a flat surface on the first inorganic film layer 310. Since the curved surface or particles formed on the top surface of the first inorganic film layer 310 are covered by the organic film layer 320, the influence of the surface state of the top surface of the first inorganic film layer 310 on the components on the organic film layer 320 may be prevented or reduced.

[0095] The second inorganic film layer 330 may be directly located on the organic film layer 320. The second inorganic film layer 330 may prevent, reduce, or minimize leakage of pollutants or moisture, etc., discharged from the organic film layer 320.

[0096] The first inorganic film layer 310 and the second inorganic film layer 330 may include silicon oxide (SiO x ), Silicon Nitride (SiN x ), silicon oxynitride (SiO x N y ), aluminum oxide (Al 2 O 3 ), titanium oxide (TiO 2 ), Tantalum Oxide (Ta 2 O 5 ), hafnium oxide (HfO 2 ) or zinc oxide (ZnO x ) etc. Here, ZnO x It may include zinc oxide (ZnO) and / or zinc peroxide (ZnO 2 ), and the first inorganic film layer 310 and the second inorganic film layer 330 may include a single layer or multiple layers including the aforementioned materials. The organic film layer 320 may include a polymer-based material. The polymer-based material may include acrylic resin, epoxy resin, polyimide, polyethylene, etc. According to some embodiments, the organic film layer 320 may include acrylate.

[0097] According to some embodiments, components between the lower substrate 100 and the pixel defining film 120 may be collectively referred to as an insulating layer 30 .

[0098] Figure 5 is a schematic diagram showing a display device 1 according to some embodiments (see Figure 1 ), a top plan view of a portion of Figure 6 is a cross-sectional view schematically showing a display device 1 according to some embodiments, and Figure 6 It is along Figure 5sectional views taken along line II-II′, line III-III′ and line IV-IV′ shown in FIG.

[0099] Reference Figure 5 and Figure 6 , the insulating layer 30 may be located on the lower substrate 100. Figure 4 As described, the insulating layer 30 may include the buffer layer 111 , the first insulating layer 113 , the second insulating layer 115 , and the planarization layer 117 , and the thin film transistor TFT among the components included in the insulating layer 30 .

[0100] The first pixel electrode 211, the second pixel electrode 213, and the third pixel electrode 215 may each be located on the insulating layer 30. The pixel defining film 120 may be located on the first pixel electrode 211, the second pixel electrode 213, and the third pixel electrode 215, and the pixel defining film 120 may include an opening 120OP at least partially exposing the first pixel electrode 211, the second pixel electrode 213, and the third pixel electrode 215. The emission regions (i.e., the first emission region EA1, the second emission region EA2, and the third emission region EA3) of the sub-pixels (i.e., the first sub-pixel PXa, the second sub-pixel PXb, and the third sub-pixel PXc) may be defined by the opening 120OP defined in the pixel defining film 120.

[0101] The first light emitting device OLED1 may have a first emission area EA1, and the first emission area EA1 of the first light emitting device OLED1 may be defined by the opening 120OP of the pixel defining film 120. Here, the first emission area EA1 may correspond to an emission area of ​​light emitted from the first light emitting device OLED1.

[0102] The second light emitting device OLED2 may have a second emission area EA2, and the second emission area EA2 of the second light emitting device OLED2 may be defined by the opening 120OP of the pixel defining film 120. Here, the second emission area EA2 may correspond to an emission area of ​​light emitted from the second light emitting device OLED2.

[0103] The third light emitting device OLED3 may have a third emission area EA3, and the third emission area EA3 of the third light emitting device OLED3 may be defined by the opening 120OP of the pixel defining film 120. Here, the third emission area EA3 may correspond to an emission area of ​​light emitted from the third light emitting device OLED3.

[0104] In addition, the pixel defining film 120 can prevent or reduce arcing, etc. generated at the edges of the first pixel electrode 211 to the third pixel electrode 215 by increasing the distance between the edge of the first pixel electrode 211 and the opposing electrode 230, the distance between the edge of the second pixel electrode 213 and the opposing electrode 230, and the distance between the edge of the third pixel electrode 215 and the opposing electrode 230.

[0105] The intermediate layer 220 may be located on the first pixel electrode 211 to the third pixel electrode 215, and the counter electrode 230 may be located on the intermediate layer 220. The intermediate layer 220 may be provided as a layer integrally formed above the first pixel electrode 211 to the third pixel electrode 215. However, the embodiment is not limited thereto. The intermediate layer 220 may be patterned in each of the first pixel electrode 211, the second pixel electrode 213, and the third pixel electrode 215.

[0106] The thin film encapsulation layer 300 may be located on the first to third light emitting devices OLED1 to OLED3. Figure 4 As described, the thin film encapsulation layer 300 may be provided as a structure in which the first inorganic film layer 310 , the organic film layer 320 , and the second inorganic film layer 330 are sequentially stacked.

[0107] The upper substrate 600 may be above the lower substrate 100, so that the first light-emitting device OLED1 including the first pixel electrode 211, the second light-emitting device OLED2 including the second pixel electrode 213, and the third light-emitting device OLED3 including the third pixel electrode 215 may be between the upper substrate 600 and the lower substrate 100. The upper substrate 600 may include a polymer material. The upper substrate 600 may include, for example, a polymer resin such as polyethersulfone, polyacrylate, polyetherimide, polyethylene naphthalate, polyethylene terephthalate, polyphenylene sulfide, polyarylate, polyimide, polycarbonate, or cellulose acetate propionate. The upper substrate 600 may be variously modified, for example, may have a multilayer structure including two layers including the aforementioned polymer material and a barrier layer between the two layers, the barrier layer including an inorganic material, such as SiN x 、SiO x N y and SiO x etc. The upper substrate 600 may be flexible or bendable.

[0108] According to some embodiments, the upper substrate 600 may include a top surface 600-1 and a bottom surface 600-2. Here, the bottom surface 600-2 may refer to a surface closer to the lower substrate 100 than the top surface 600-1.

[0109] According to some embodiments, the embankment 500 may be located between the lower substrate 100 and the upper substrate 600. The embankment 500 may include various materials that can absorb light. The embankment 500 may include a first opening OP1, a second opening OP2, and a third opening OP3 corresponding to emission areas (i.e., first emission area EA1, second emission area EA2, and third emission area EA3) of the light-emitting devices (i.e., first light-emitting device OLED1, second light-emitting device OLED2, and third light-emitting device OLED3), respectively. More specifically, the first opening OP1 corresponding to the first emission area EA1 of the first light-emitting device OLED1, the second opening OP2 corresponding to the second emission area EA2 of the second light-emitting device OLED2, and the third opening OP3 corresponding to the third emission area EA3 of the third light-emitting device OLED3 may be defined in the embankment 500 arranged in the display area DA.

[0110] According to some embodiments, the first opening OP1, the second opening OP2, and the third opening OP3 defined in the bank 500 may correspond to the opening 120OP defined in the pixel defining film 120. For example, the first opening OP1 defined in the bank 500 may correspond to the opening 120OP of the pixel defining film 120 that defines the first emission area EA1; the second opening OP2 defined in the bank 500 may correspond to the opening 120OP of the pixel defining film 120 that defines the second emission area EA2; and the third opening OP3 defined in the bank 500 may correspond to the opening 120OP of the pixel defining film 120 that defines the third emission area EA3. That is to say, the correspondence between the first opening OP1 to the third opening OP3 of the embankment 500 and the openings 120OP of the pixel defining film 120 that respectively define the first emission areas EA1 to the third emission areas EA3 can mean that, when viewed in a direction perpendicular to the top surface 600-1 of the upper substrate 600 (for example, the z direction), the shapes of the edges of the first opening OP1 to the third opening OP3 of the embankment 500 are the same as or similar to the shapes of the edges of the openings 120OP of the pixel defining film 120 that respectively define the first emission areas EA1 to the third emission areas EA3.

[0111] According to some embodiments, areas of the first to third openings OP1 to OP3 defined in the bank 500 may be greater than areas of the openings 120OP of the pixel defining film 120 that respectively define the first to third emission areas EA1 to EA3 .

[0112] According to some embodiments, the first quantum dot layer 561 may be arranged in the first opening OP1 defined in the bank 500; the second quantum dot layer 563 may be arranged in the second opening OP2 defined in the bank 500; and the light transmission layer 565 may be arranged in the third opening OP3 defined in the bank 500. The first quantum dot layer 561, the second quantum dot layer 563, and the light transmission layer 565 may include the above reference Figure 3 Describe the material.

[0113] According to some embodiments, the first quantum dot layer 561 , the second quantum dot layer 563 , and the light transmission layer 565 may be formed in the first opening OP1 , the second opening OP2 , and the third opening OP3 of the bank 500 , respectively, by an inkjet printing method.

[0114] According to some embodiments, the first color filter layer 581, the second color filter layer 583, and the third color filter layer 585 may be located below the bottom surface 600-2 of the upper substrate 600. The first color filter layer 581 may be directly located on the first quantum dot layer 561; the second color filter layer 583 may be directly located on the second quantum dot layer 563; and the third color filter layer 585 may be directly located on the light transmission layer 565. Therefore, light converted in the first quantum dot layer 561 may be directly incident on the first color filter layer 581; light converted in the second quantum dot layer 563 may be directly incident on the second color filter layer 583; and light transmitted through the light transmission layer 565 may be directly incident on the third color filter layer 585.

[0115] According to some embodiments, only light having wavelengths in different wavelength bands may pass through the first color filter layer 581, the second color filter layer 583, and the third color filter layer 585. More specifically, only light having a wavelength of a first wavelength band may pass through the first color filter layer 581; only light having a wavelength of a second wavelength band may pass through the second color filter layer 583; and only light having a wavelength of a third wavelength band may pass through the third color filter layer 585. Here, the first wavelength band may be in the range of 630 nm (or about 630 nm) to 780 nm (or about 780 nm), the second wavelength band may be in the range of 495 nm (or about 495 nm) to 570 nm (or about 570 nm), and the third wavelength band may be in the range of 450 nm (or about 450 nm) to 495 nm (or about 495 nm). That is, only light having a wavelength within the range of 630nm (or approximately 630nm) to 780nm (or approximately 780nm) can pass through the first color filter layer 581; only light having a wavelength within the range of 495nm (or approximately 495nm) to 570nm (or approximately 570nm) can pass through the second color filter layer 583; and only light having a wavelength within the range of 450nm (or approximately 450nm) to 495nm (or approximately 495nm) can pass through the third color filter layer 585.

[0116] According to some embodiments, the first color filter layer 581 may overlap (or at least partially overlap) the first light emitting device OLED1 including the first pixel electrode 211. For example, the first color filter layer 581 may overlap (or at least partially overlap) the first emission area EA1 of the first light emitting device OLED1. Therefore, light emitted from the first light emitting device OLED1 may pass through the first color filter layer 581. Further details thereof will be further described later.

[0117] According to some embodiments, the second color filter layer 583 may overlap (or at least partially overlap) the second light emitting device OLED2 including the second pixel electrode 213. For example, the second color filter layer 583 may overlap (or at least partially overlap) the second emission area EA2 of the second light emitting device OLED2. Therefore, light emitted from the second light emitting device OLED2 may pass through the second color filter layer 583. Further details thereof will be further described later.

[0118] According to some embodiments, the third color filter layer 585 may overlap (or at least partially overlap) the third light emitting device OLED3 including the third pixel electrode 215. For example, the third color filter layer 585 may overlap (or at least partially overlap) the third emission area EA3 of the third light emitting device OLED3. Therefore, light emitted from the third light emitting device OLED3 may pass through the third color filter layer 585. Further details thereof will be further described later.

[0119] According to some embodiments, the fourth opening OP4 and the fifth opening OP5 may be defined in the first color filter layer 581. The fourth opening OP4 defined in the first color filter layer 581 may overlap (or at least partially overlap) the second color filter layer 583, and the fifth opening OP5 defined in the first color filter layer 581 may overlap (or at least partially overlap) the third color filter layer 585.

[0120] According to some embodiments, the sixth opening OP6 and the seventh opening OP7 may be defined in the second color filter layer 583. The sixth opening OP6 defined in the second color filter layer 583 may overlap (or at least partially overlap) the first color filter layer 581, and the seventh opening OP7 defined in the second color filter layer 583 may overlap (or at least partially overlap) the third color filter layer 585.

[0121] According to some embodiments, the eighth opening OP8 and the ninth opening OP9 may be defined in the third color filter layer 585. The eighth opening OP8 defined in the third color filter layer 585 may overlap (or at least partially overlap) the first color filter layer 581, and the ninth opening OP9 defined in the third color filter layer 585 may overlap (or at least partially overlap) the second color filter layer 583.

[0122] According to some embodiments, at least a portion of the first color filter layer 581 may be exposed through the sixth opening OP6 defined in the second color filter layer 583 and the eighth opening OP8 defined in the third color filter layer 585. The first color filter layer 581 may directly contact the first quantum dot layer 561 through the sixth opening OP6, and may directly contact the bottom surface 600-2 of the upper substrate 600 through the eighth opening OP8. That is, the first color filter layer 581 may directly contact the first quantum dot layer 561 in a direction of the bottom surface 600-2 of the upper substrate 600 (e.g., -z direction), and may also directly contact the bottom surface 600-2 of the upper substrate 600 in a direction of the top surface 600-1 of the upper substrate 600 (e.g., +z direction).

[0123] Therefore, light having a wavelength of the first wavelength band can be emitted outward from the first sub-pixel PXa through the upper substrate 600. More specifically, light of the third wavelength band emitted from the first light-emitting device OLED1 is converted into light of the first wavelength band when passing through the first quantum dot layer 561, and is filtered when passing through the first color filter layer 581, and therefore, light having a wavelength of the first wavelength band can be emitted outward from the first sub-pixel PXa through the upper substrate 600. In addition, as the light emitted from the first light-emitting device OLED1 passes through the first quantum dot layer 561 and the first color filter layer 581, the color purity of the light emitted through the upper substrate 600 can be relatively improved.

[0124] According to some embodiments, at least a portion of the second color filter layer 583 may be exposed through the fourth opening OP4 defined in the first color filter layer 581 and the ninth opening OP9 defined in the third color filter layer 585. The second color filter layer 583 may directly contact the bottom surface 600-2 of the upper substrate 600 through the fourth opening OP4 and the ninth opening OP9. That is, the second color filter layer 583 may directly contact the second quantum dot layer 563 in a direction (e.g., -z direction) of the bottom surface 600-2 of the upper substrate 600, and may also directly contact the bottom surface 600-2 of the upper substrate 600 in a direction (e.g., + direction) of the top surface 600-1 of the upper substrate 600.

[0125] Therefore, light having a wavelength of the second wavelength band may be emitted outward from the second sub-pixel PXb through the upper substrate 600. More specifically, light of the third wavelength band emitted from the second light-emitting device OLED2 may be converted into light of the second wavelength band when passing through the second quantum dot layer 563, and may be filtered when passing through the second color filter layer 583, and therefore, light having a wavelength of the second wavelength band may be emitted outward from the second sub-pixel PXb through the upper substrate 600. In addition, as light emitted from the second light-emitting device OLED2 passes through the second quantum dot layer 563 and the second color filter layer 583, the color purity of light emitted through the upper substrate 600 may be improved.

[0126] According to some embodiments, at least a portion of the third color filter layer 585 may be exposed through the fifth opening OP5 defined in the first color filter layer 581 and the seventh opening OP7 defined in the second color filter layer 583. The third color filter layer 585 may directly contact the light transmission layer 565 through the fifth opening OP5 and the seventh opening OP7. That is, the third color filter layer 585 may directly contact the light transmission layer 565 in a direction of the bottom surface 600-2 of the upper substrate 600 (e.g., -z direction), and may also directly contact the bottom surface 600-2 of the upper substrate 600 in a direction of the top surface 600-1 of the upper substrate 600 (e.g., +z direction).

[0127] Therefore, light having a wavelength of the third wavelength band may be emitted from the third sub-pixel PXc to the outside through the upper substrate 600. More specifically, light of the third wavelength band emitted by the third light-emitting device OLED3 passes through the light-transmitting layer 565, and is filtered while passing through the third color filter layer 585, and therefore, light having a wavelength of the third wavelength band may be emitted from the third sub-pixel PXc through the upper substrate 600. In addition, as light emitted from the third light-emitting device OLED3 passes through the light-transmitting layer 565 and the third light-emitting device OLED3, the color purity of light emitted through the upper substrate 600 may be improved.

[0128] According to some embodiments, among the first subpixel PXa, the second subpixel PXb, and the third subpixel PXc, at least two color filter layers may exist in an overlapping manner. Figure 6 It is shown that the first color filter layer 581, the second color filter layer 583, and the third color filter layer 585 exist in the first sub-pixel PXa, the second sub-pixel PXb, and the third sub-pixel PXc. The color filter layers overlapping each other can play the role of a black matrix. This is because, for example, when only light with a wavelength of the first band passes through the first color filter layer 581, only light with a wavelength of the second band passes through the second color filter layer 583, and only light with a wavelength of the third band passes through the third color filter layer 585, in theory, light with any wavelength may not pass through the layers overlapping each other.

[0129] According to some embodiments, the first color filter layer 581, the second color filter layer 583, and the third color filter layer 585 may be arranged in an overlapping manner between the upper substrate 600 and the bank 500. Since the first color filter layer 581, the second color filter layer 583, and the third color filter layer 585 are arranged in an overlapping manner between the upper substrate 600 and the bank 500, the height difference between the upper substrate 600 and the bank 500 may be constantly maintained.

[0130] According to some embodiments, the protective layer 460 and the filler 400 may be between the lower substrate 100 and the upper substrate 600. The filler 400 may be between the thin film encapsulation layer 300 and the protective layer 460, and the protective layer 460 may be between the filler 400 and the bank 500.

[0131] According to some embodiments, the filler 400 may have a buffering function against external pressure, etc. The filler 400 may include an organic material such as methyl silicon, phenyl silicon, and polyimide, etc. However, the filler 400 is not limited thereto, and may also include an organic sealant such as a urethane-based resin, an epoxy-based resin, an acrylic-based resin, or silicon as an inorganic sealant.

[0132] According to some embodiments, protective layer 460 may be arranged or formed on or over the entire area of ​​filler 400. In addition, protective layer 460 may cover first quantum dot layer 561, second quantum dot layer 563, and light transmission layer 565. For example, as a process is performed in which a color filter and a quantum dot layer are formed on bottom surface 600-2 of upper substrate 600 and lower substrate 100 is bonded to upper substrate 600, protective layer 460 may cover first quantum dot layer 561, second quantum dot layer 563, and light transmission layer 565 formed on bottom surface 600-2 of upper substrate 600. Protective layer 460 may protect first quantum dot layer 561, second quantum dot layer 563, and light transmission layer 565.

[0133] According to some embodiments, the protective layer 460 may include a single layer or multiple layers of a film including an organic material or an inorganic material. The protective layer 460 may include a general polymer such as polystyrene (PS), benzocyclobutene (BCB), polyimide (PI), hexamethyldisiloxane (HMDSO), polymethylmethacrylate (PMMA), a polymer derivative having a phenolic group, an acrylic acid-based polymer, an imide-based polymer, an aromatic ether-based polymer, an amide-based polymer, a fluorine-based polymer, a p-xylene-based polymer, a vinyl alcohol-based polymer, and a mixture thereof. According to some embodiments, the protective layer 460 may include SiO x 、SiN x 、SiO x N y 、Al 2 O 3 、TiO 2 、 2 O 5 , HfO 2 or ZnO x Here, ZnO x It may include ZnO and / or ZnO 2 .

[0134] According to some embodiments, the column spacer 450 may be between the lower substrate 100 and the upper substrate 600. The column spacer 450 may be between the thin film encapsulation layer 300 and the protective layer 460. The column spacer 450 may overlap (or at least partially overlap) with the dam 500. In addition, the column spacer 450 may overlap (or at least partially overlap) with the pixel defining film 120 located below the column spacer 450. For example, the column spacer 450 may not overlap with the first emission area EA1 of the first light emitting device OLED1, the second emission area EA2 of the second light emitting device OLED2, and the third emission area EA3 of the third light emitting device OLED3.

[0135] According to some embodiments, the column spacer 450 may include the same material as that of the bank 500 . However, embodiments are not limited thereto. For example, the column spacer 450 may also include a material different from that of the bank 500 .

[0136] Reference Figure 5 , the first opening OP1, the second opening OP2 and the third opening OP3 may be defined in the display area DA (see Figure 6 ) in the bank 500 of the display area DA. Here, the first opening OP1, the second opening OP2, and the third opening OP3 may be provided in plural. According to some embodiments, a dummy opening may be defined in the bank 500 of the display area DA.

[0137] As described above, the first quantum dot layer 561 may be disposed in the first opening OP1 , the second quantum dot layer 563 may be disposed in the second opening OP2 , and the light transmission layer 565 may be disposed in the third opening OP3 .

[0138] Reference Figure 5 and Figure 6 , the display device 1 according to the embodiment may include a first pixel row PXR1 and a second pixel row PXR2 adjacent to each other in a first direction (x direction). The first pixels PX1 are repeatedly arranged in the first pixel row PXR1 in the second direction (y direction), and each of the first pixels PX1 is provided as a group of a plurality of sub-pixels (i.e., a first sub-pixel PXa, a second sub-pixel PXb, and a third sub-pixel PXc). The second pixels PX2 may be repeatedly arranged in the second pixel row PXR2 in the second direction (y direction), and each of the second pixels PX2 is provided as a group of a plurality of sub-pixels (i.e., a first sub-pixel PXa, a second sub-pixel PXb, and a third sub-pixel PXc).

[0139] The second pixel row PXR2 is shifted relative to the first pixel row PXR1 by a first distance d1 in the second direction (y direction). When the second pixel row PXR2 is shifted relative to the first pixel row PXR1 by the first distance d1, the second pixel PX2 may be shifted relative to the first pixel PX1 by the first distance d1.

[0140] The first distance d1 may be less than or equal to half of the size of any one of the plurality of sub-pixels (i.e., the first sub-pixel PXa, the second sub-pixel PXb, and the third sub-pixel PXc) in the second direction (e.g., the y direction). The size of the sub-pixel (i.e., the first sub-pixel PXa, the second sub-pixel PXb, and the third sub-pixel PXc) may represent the size of the emission areas (the first emission area EA1, the second emission area EA2, and the third emission area EA3) of the plurality of sub-pixels (i.e., the first sub-pixel PXa, the second sub-pixel PXb, and the third sub-pixel PXc). That is, the size of the plurality of sub-pixels (i.e., the first sub-pixel PXa, the second sub-pixel PXb, and the third sub-pixel PXc) may represent the size of the opening 120OP of the pixel defining film 120 formed in the plurality of sub-pixels (i.e., the first sub-pixel PXa, the second sub-pixel PXb, and the third sub-pixel PXc). Alternatively, the sizes of the plurality of sub-pixels (i.e., the first sub-pixel PXa, the second sub-pixel PXb, and the third sub-pixel PXc) may represent the sizes of the first opening OP1, the second opening OP2, and the third opening OP3 defined in the bank 500. For the sake of simplicity, the case where the sizes of the plurality of sub-pixels (i.e., the first sub-pixel PXa, the second sub-pixel PXb, and the third sub-pixel PXc) represent the sizes of the first opening OP1, the second opening OP2, and the third opening OP3, respectively, will be mainly described.

[0141] For example, the first distance d1 may be less than or equal to half of the size L of the first-first subpixel PXS1 provided in the first pixel PX1. Therefore, the first-first subpixel PXS1 may partially overlap the second-first subpixel PXS2 in the first direction (x direction), the first-first subpixel PXS1 being included in the first pixel PX1 and emitting light of the first color, and the second-first subpixel PXS2 being included in the second pixel PX2 and emitting light of the first color that is the same as the light of the first color of the first-first subpixel PXS1. The first-first subpixel PXS1 and the second-first subpixel PXS2 may each include any one of the first subpixel PXa, the second subpixel PXb, and the third subpixel PXc.

[0142] According to some embodiments, the arrangement of the plurality of sub-pixels (i.e., the first sub-pixel PXa, the second sub-pixel PXb, and the third sub-pixel PXc) provided in the first pixel PX1 may be the same as the arrangement of the plurality of sub-pixels (i.e., the first sub-pixel PXa, the second sub-pixel PXb, and the third sub-pixel PXc) provided in the second pixel PX2. That is, the relative distance and positional relationship between the first sub-pixel PXa and the second sub-pixel PXb provided in the first pixel PX1 may be the same as the relative distance and positional relationship between the first sub-pixel PXa and the second sub-pixel PXb included in the second pixel PX2. The relative distance and positional relationship between the second sub-pixel PXb and the third sub-pixel PXc included in the first pixel PX1 may be the same as the relative distance and positional relationship between the second sub-pixel PXb and the third sub-pixel PXc included in the second pixel PX2. A relative distance and a positional relationship between the first subpixel PXa and the third subpixel PXc included in the first pixel PX1 may be the same as a relative distance and a positional relationship between the first subpixel PXa and the third subpixel PXc included in the second pixel PX2 .

[0143] According to some embodiments, the first distance d1 may be the same as a distance by which each of the plurality of sub-pixels (the first sub-pixel PXa, the second sub-pixel PXb, and the third sub-pixel PXc) included in the second pixel PX2 is shifted in the second direction (y direction) relative to a plurality of sub-pixels (i.e., the first sub-pixel PXa, the second sub-pixel PXb, and the third sub-pixel PXc) included in the first pixel PX1 that emit light having the same color as the plurality of sub-pixels included in the second pixel PX2. For example, the first distance d1 may be the same as a distance by which the second-first sub-pixel PXS2 is shifted in the second direction (y direction) relative to the first-first sub-pixel PXS1.

[0144] The second pixel row PXR2 is shifted by the first distance d1 relative to the first pixel row PXR1, which can be understood as the second pixel PX2 is shifted by the first distance d1 relative to the first pixel PX1, and in addition, it can also be understood as the second-first sub-pixel PXS2 is shifted by the first distance d1 relative to the first-first sub-pixel PXS1. Through the aforementioned pixel arrangement, the display device 1 according to the embodiment can achieve high-quality images. Fig.10 Describe them in detail.

[0145] Figure 7 and Figure 8 is a schematic diagram showing a display device 1 according to some embodiments (see Figure 1 )’s top plan view.

[0146] Reference Figure 7, the display device 1 may include n (where n is a natural number equal to or greater than 2) pixel rows including a first pixel row PXR1 and a second pixel row PXR2. The n pixel rows may include the first pixel row PXR1 and the second pixel row PXR2, and may be arranged in a first direction (x direction). The n pixel rows may each be shifted relative to the first pixel row PXR1 in a second direction (y direction) by an integer multiple of a first distance d1.

[0147] Reference Figure 7 , the n pixel rows may include a first pixel row PXR1, a second pixel row PXR2, a third pixel row PXR3, a fourth pixel row PXR4 and a fifth pixel row PXR5, and the first pixel PX1, the second pixel PX2, the third pixel PX3, the fourth pixel PX4 and the fifth pixel PX5 are respectively included in the first pixel row PXR1, the second pixel row PXR2, the third pixel row PXR3, the fourth pixel row PXR4 and the fifth pixel row PXR5. Figure 7 , the first pixel row PXR1, the second pixel row PXR2, the third pixel row PXR3, the fourth pixel row PXR4 and the fifth pixel row PXR5 are respectively shifted by 0 times, 1 times, 0 times, 1 times and 0 times of the first distance d1 relative to the first pixel row PXR1. As described above, the even pixel rows (i.e., the second pixel row PXR2 and the fourth pixel row PXR4) among the n pixel rows can be shifted by the first distance d1 relative to the odd pixel rows (i.e., the first pixel row PXR1, the third pixel row PXR3 and the fifth pixel row PXR5) in the second direction (y direction). In this case, the n pixel rows can be arranged in a zigzag manner in the first direction (x direction).

[0148] Reference Figure 8 , n pixel rows may be repeatedly arranged in the first direction (x direction). For example, Figure 8 It is shown that the first pixel row PXR1, the second pixel row PXR2, the third pixel row PXR3 and the fourth pixel row PXR4 are respectively shifted by 0 times, 1 times, 0 times and -1 times of the first distance d1 relative to the first pixel row PXR1. Similarly, the fifth pixel row PXR5, the sixth pixel row PXR6, the seventh pixel row PXR7 and the eighth pixel row PXR8 can be respectively shifted by 0 times, 1 times, 0 times and -1 times of the first distance d1 relative to the first pixel row PXR1. That is, the four pixel rows can be repeatedly arranged in a cycle of {0, 1, 0, -1} in the first direction (x direction). Figure 8 Unlike the example shown in , five or more pixel rows may be repeatedly arranged in the first direction (x direction). Since n pixel rows are repeatedly arranged in the first direction (x direction), the difficulty in the process of manufacturing the display device 1 can be reduced. Fig.10 Describe them in detail.

[0149] Fig. 9 is a schematic diagram showing a display device 1 (see Figure 1 ) a cross-sectional view of a manufacturing apparatus, and Fig.10 is a top plan view schematically illustrating a method of manufacturing the display device 1 according to some embodiments. Fig.11 is included according to the location shown Fig.10 0 is a top plan view of the brightness of the third subpixel PXc in each pixel shown in . Fig. 12A is a top plan view schematically showing a display device according to a comparative example; and Fig. 12B is included according to the location shown Fig. 12A 0 is a top plan view of the brightness of the third subpixel PXc in each pixel shown in .

[0150] Reference Fig. 9 , also refer to Figure 6 , the manufacturing apparatus for the display device 1 may include an ejector 1100 , a body 1200 , a support 1300 , a first driver 1400 , a second driver 1500 , and a stage 1600 .

[0151] The discharger 1100 may include a plurality of heads 1110 (see Fig.10 ). In addition, the plurality of heads 1110 may each include at least one nozzle NZL (see Fig.10 Here, the plurality of nozzles NZL may be arranged in a row or in a zigzag manner. Hereinafter, for the convenience of explanation, a case where the plurality of nozzles NZL are arranged in a row will be mainly described in detail.

[0152] The plurality of nozzles NZL arranged in the above-described head 1110 may be arranged to be spaced apart from each other in the second direction (y direction).

[0153] The main body 1200 may be formed in various types and may be located on the ground, the surface of another process machine, the bottom surface of a building, etc. For example, the main body 1200 may have the form of a plate. According to some embodiments, the main body 1200 may also have the form of a table in which a plurality of frames are connected to each other. According to some embodiments, the main body 1200 may have a shape in which a plurality of frames and a plurality of plates are arranged in the form of a box. Here, the main body 1200 is not limited thereto and may include any structure, and the structure arranged on any structure, etc. may be supported by the any structure.

[0154] The support 1300 may be connected to the main body 1200 and support the discharger 1100. According to some embodiments, the support 1300 may be fixed to the main body 1200. According to some embodiments, the support 1300 may be located on the main body 1200 in a linearly movable manner. In this case, a driver such as a gantry may be located between the support 1300 and the main body 1200, and the support 1300 may perform linear movement on the gantry. However, for ease of explanation, the case where the support 1300 is fixed to the main body 1200 will be mainly described in more detail.

[0155] The discharger 1100 may be fixed to the support 1300 described above. According to some embodiments, the discharger 1100 may be located below the support 1300 in a linearly movable manner. In this case, a cylinder, a linear motor, a motor, a ball screw, a motor, and a rack gear may be arranged in at least one of the discharger 1100 or the support 1300 so that the discharger 1100 can be moved in a first direction (e.g., Fig. 9 The linear movement is performed in the x direction (shown in FIG. 1 ). Hereinafter, for the convenience of explanation, the case where the discharger 1100 is fixed to the support member 1300 will be mainly described.

[0156] The first driver 1400 may be located between the main body 1200 and the stage 1600. Here, the first driver 1400 may have the stage 1600 to perform linear movement in the first direction (x direction). In this case, the first driver 1400 may have various shapes. According to some embodiments, the first driver 1400 may include a cylinder fixed to the main body 1200 and including an axis connected to the second driver 1500. According to some embodiments, the first driver 1400 may include a motor fixed to the main body 1200 and a ball screw connected to the motor and the second driver 1500. According to some embodiments, the first driver 1400 may also include a linear motor connected to the second driver 1500. However, the first driver 1400 is not limited thereto, and may include any structure and device connected to the second driver 1500 and configured to have the stage 1600 to perform linear movement in the first direction (x direction).

[0157] The second driver 1500 may be located above the first driver 1400. In this case, the second driver 1500 may move the stage 1600 in the second direction (eg, Fig. 9 In the foregoing case, the second driver 1500 may have a form similar to that of the first driver 1400. Hereinafter, for ease of explanation, a case where the first driver 1400 and the second driver 1500 each include a linear motor will be mainly described.

[0158] The stage 1600 may be connected to the second driver 1500, and may perform linear movement in at least one of the first direction (x direction) and the second direction (y direction) according to the operation of the first driver 1400 and the second driver 1500. Here, the stage 1600 may be set on the upper substrate 600. In this case, when the stage 1600 performs linear movement in at least one of the first direction (x direction) and the second direction (y direction), the upper substrate 600 may also perform linear movement in at least one of the first direction (x direction) and the second direction (y direction).

[0159] A space may be formed in the chamber 1700, and the discharger 1100, the body 1200, the support 1300, the first driver 1400, the second driver 1500, and the stage 1600 may be arranged in the chamber 1700. Here, the chamber 1700 may include an open portion, and a gate valve or the like may be arranged in the open portion of the chamber 1700 to open and close the open portion of the chamber 1700.

[0160] The pressure regulator 1800 may be connected to the chamber 1700. The pressure regulator 1800 may include a pipe 1810 and a pump 1820 disposed in the pipe 1810. In this case, the pump 1820 may exhaust the gas in the chamber 1700 to the outside, or may introduce the gas from the outside into the chamber 1700.

[0161] The manufacturing apparatus for a display device may form a quantum dot layer and a light transmission layer by providing droplets to upper substrate 600. According to some embodiments, the manufacturing apparatus for a display device may form an emission layer on lower substrate 100 by providing droplets to lower substrate 100.

[0162] For the sake of simplicity of explanation, an example in which the light transmitting layer 565 is formed by discharging a liquid droplet to the third opening OP3 of the bank 500 , which corresponds to the emission region of the third subpixel PXc, will be described.

[0163] Reference Fig.10 , the plurality of nozzles NZL arranged in the head 1110 may be arranged to be spaced apart from each other in the second direction (y direction). The plurality of nozzles NZL may be arranged to be spaced apart from each other at a uniform nozzle distance NP, for example, in an embodiment, the plurality of nozzles NZL may include a first nozzle NZL1, a second nozzle NZL2, a third nozzle NZL3, a fourth nozzle NZL4, a fifth nozzle NZL5, a sixth nozzle, a seventh nozzle NZL7, an eighth nozzle NZL8, a ninth nozzle NZL9, and a tenth nozzle NZL10, etc. However, embodiments according to the present disclosure are not limited thereto.

[0164] The plurality of nozzles NZL may sequentially supply droplets to the discharge area SA of the third subpixel PXc arranged in each of the first pixel PX1 , the second pixel PX2 , the third pixel PX3 , the fourth pixel PX4 , and the fifth pixel PX5 in the first direction (x direction).

[0165] In general, when the third sub-pixel PXc is formed in a small size to realize a high-resolution image, the number of nozzles NZL for supplying droplets decreases. In addition, since the plurality of nozzles NZL cannot accurately discharge droplets, the droplets are only provided in the discharge area SA corresponding to the central portion of the third opening OP3 to ensure a margin, and are not provided to the entire area of ​​the third opening OP3 of the bank 500, and therefore, the number of nozzles NZL for one third sub-pixel PXc further decreases.

[0166] When a plurality of pixel rows (ie, a first pixel row PXR1, a second pixel row PXR2, a third pixel row PXR3, a fourth pixel row PXR4, and a fifth pixel row PXR5) are Fig. 12A , and are not shifted in the second direction (y direction) from each other, unlike in the embodiment, the third sub-pixels PXc aligned in the first direction (x direction) can receive droplets from the same nozzle NZL. That is, the third sub-pixels PXc aligned in the same column can receive droplets having the same volume from the same nozzle NZL. Since the volume of the droplet has an influence on the brightness of the corresponding pixel, the third sub-pixels PXc aligned in the same column have the same brightness.

[0167] In addition, since it is difficult to make a plurality of nozzles NZL provide droplets having exactly the same amount, different amounts of droplets may be provided to the columns. That is, since the brightness of the third subpixels PXc arranged in the same column is the same and the columns have different brightnesses, they may be recognized as horizontal lines on the display device, thereby causing degradation in display quality.

[0168] Reference Fig.10 According to some embodiments, the second pixel row PXR2 may be shifted by a first distance d1 in the second direction (y direction) relative to the first pixel row PXR1. The first distance d1 may be less than or equal to half the size of the third subpixel PXc. The first distance d1 may represent a distance by which the third subpixel PXc included in the second pixel PX2 is shifted in the second direction (y direction) compared to the third subpixel PXc included in the first pixel PX1.

[0169] Since the second pixel row PXR2 is shifted in the second direction (y direction) relative to the first pixel row PXR1, the nozzle NZL for discharging droplets to the third subpixel PXc of the first pixel PX1 may be different from the nozzle NZL for discharging droplets to the third subpixel PXc of the second pixel PX2.

[0170] For example, Fig.10 As shown in , the fourth nozzle NZL4 and the fifth nozzle NZL5 can be used in the third pixel PXc of the first pixel PX1, and on the other hand, the third nozzle NZL3 and the fourth nozzle NZL4 can be used in the third pixel PXc of the second pixel PX2. That is, even for the third sub-pixels PXc arranged in the same column, droplets can be applied using part or completely different nozzles. Even if the third nozzle NZL3 discharges more droplets than other nozzles due to manufacturing errors, the third nozzle NZL3 is used only in some of the third sub-pixels PXc arranged in the same column, and therefore, as Fig.11 As shown in , horizontal lines can reduce visibility. Fig.11 is included according to the location shown Fig.10 0 is a top plan view of the brightness of the third subpixel PXc in each pixel shown in .

[0171] When the pixel row is as above Fig. 12A When the comparative example shown in is arranged without shifting, as Fig. 12B As shown, the horizontal line caused by the error of the nozzle can be confirmed. Fig. 12B is included according to the location shown Fig. 12A 0 is a top plan view of the brightness of the third subpixel PXc in each pixel shown in .

[0172] Refer again Fig.10 , when the first distance d1 is arbitrarily set independently of the nozzle distance, the number of nozzles NZL may vary according to the pixel row corresponding to the discharge area SA. According to some embodiments, the first distance d1 may be provided as an integer multiple of the nozzle distance NP. Therefore, the number of nozzles NZL used in all pixel rows may be kept constant.

[0173] That is, by constantly keeping the number of nozzles NZL even in pixels arranged in the same row and using the nozzles NZL differently (hereinafter, mixed nozzles), concentration of pixels having the same brightness can be prevented or reduced.

[0174] Since the second pixel row PXR2 is shifted by the first distance d1 in the second direction (y direction) relative to the first pixel row PXR1, the display device according to some embodiments can achieve high-quality images even at high resolutions. In addition, in the method of manufacturing a display device according to some embodiments, a display device configured to achieve high-quality images even at high resolutions can be manufactured by providing droplets to the first opening OP1, the second opening OP2, and the third opening OP3 of the dam 500 arranged according to the above-mentioned specific pixel arrangement.

[0175] Compared with the case where a plurality of nozzles NZL vibrate in the second direction (y direction) and mix with each other, the display device can more safely provide droplets to the discharge area. In addition, since the pixel row can be repeated at a constant cycle period, the operation for the process can be more convenient than the case where the substrate is tilted to mix the nozzles.

[0176] According to some embodiments implemented as described above, a display device configured to achieve a high-quality image even at a high resolution due to a pixel row shift by a certain distance and a method of manufacturing the display device are implemented.

[0177] It should be understood that the embodiments described herein should be considered in a descriptive sense only, and not for limiting purposes. The description of features or aspects within each embodiment should generally be considered to be applicable to other similar features or aspects in other embodiments. Although one or more embodiments have been described with reference to the drawings, it will be understood by those of ordinary skill in the art that various changes may be made to the embodiments in form and detail without departing from the spirit and scope as defined by the appended claims and their equivalents.

Claims

1. A display device, characterized in that: The display device includes a plurality of pixels and is configured to display an image, The plurality of pixels include a first pixel row and a second pixel row adjacent to each other along a first direction, First pixels are repeatedly arranged in the first pixel row in a second direction perpendicular to the first direction, the first pixels comprising a first group of a first plurality of sub-pixels; The second row of pixels is shifted relative to the first row of pixels by a first distance in the second direction, and The first distance is less than or equal to half of a size of any one of the first plurality of sub-pixels in the second direction.

2. The display device according to claim 1, characterized in that The second pixels are repeatedly arranged in the second pixel row in the second direction, the second pixels include a second group of a second plurality of sub-pixels, and An arrangement of the first plurality of sub-pixels of the first pixel is the same as an arrangement of the second plurality of sub-pixels of the second pixel.

3. The display device according to claim 2, characterized in that: A 1-1 subpixel configured to emit a first color among the first plurality of subpixels of the first pixel partially overlaps a 2-1 subpixel configured to emit the first color among the second plurality of subpixels of the second pixel in the first direction.

4. The display device according to claim 3, characterized in that: The 2-1 sub-pixel is shifted relative to the 1-1 sub-pixel by the first distance in the second direction.

5. The display device according to claim 1, characterized in that The plurality of pixels include n pixel rows, the n pixel rows include the first pixel row and the second pixel row and are arranged along the first direction, where n is a natural number equal to or greater than 2.

6. The display device according to claim 5, characterized in that: Each of the n pixel rows is shifted relative to the first pixel row in the second direction by an integer multiple of the first distance.

7. The display device according to claim 6, characterized in that: The n pixel rows are repeatedly arranged along the first direction.

8. The display device according to claim 6, characterized in that: The even-numbered pixel rows among the n pixel rows are shifted relative to the odd-numbered pixel rows by the first distance in the second direction.

9. The display device according to claim 1, characterized in that: The display device includes an emission panel and a color panel, and The color panel includes: a bank in which openings corresponding to emission regions of the plurality of pixels are provided; and a quantum dot layer filling the openings of the bank.

10. The display device according to claim 9, characterized in that: The emission panel includes: a pixel electrode; a pixel defining film in which an opening is provided to expose a portion of the pixel electrode and corresponds to the emission regions of the plurality of pixels; and an emission layer filling the opening of the pixel defining film.

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