Indication device

Abstract

The present invention relates to a display device. The display device includes a substrate; subpixels comprising a first subpixel, a second subpixel, and a third subpixel, each comprising a first subpixel and a first subpixel, each including a subpixel electrode, a light-emitting layer on the subpixel electrode, and a counter electrode on the light-emitting layer; a bank layer having a lower opening that defines the light-emitting region of each subpixel; a light-shielding layer on the bank layer that defines an upper opening superimposed on each of the lower openings; and a color filter on the light-shielding layer comprising a first color filter, a second color filter, and a third color filter.

Description

Technical Field

[0001] The present invention relates to a display device.

Background Art

[0002] A display device is a device that visually displays data. The display device may be used as a display unit of a small product such as a mobile phone, or may be used as a display unit of a large product such as a television.

[0003] The display device includes a plurality of sub-pixels that receive an electrical signal and emit light in order to display an image externally. Each sub-pixel includes a light-emitting element. For example, in the case of an organic light-emitting display device, an organic light-emitting diode (OLED) is included as the light-emitting element. Generally, an organic light-emitting display device forms a thin film transistor and an organic light-emitting diode on a substrate, and the organic light-emitting diode emits light by itself to operate.

[0004] Recently, display devices have been diversifying in their applications, and various designs have been tried to improve the quality of the display devices.

Summary of the Invention

Problems to be Solved by the Invention

[0005] An embodiment of the present invention is to provide a high-resolution display device that improves interference fringes due to external light reflection and diffraction and has excellent display quality. However, such problems are exemplary and do not limit the scope of the present invention.

Means for Solving the Problems

[0006] In one aspect of the present invention, a display device is disclosed, comprising: a substrate; subpixels comprising a first subpixel, a second subpixel, and a third subpixel, each including the first subpixel and the first subpixel, which emit light of the same color to each other, and the light reflected from the first-1 subpixel having a phase difference with the light reflected from the first-2 subpixel; a bank layer having a lower opening that defines the light-emitting region of each of the subpixels; a light-shielding layer on the bank layer that defines an upper opening superimposed on each of the lower openings; and a color filter on the light-shielding layer comprising a first color filter, a second color filter, and a third color filter.

[0007] In another aspect of the present invention, a display device is disclosed, comprising: a substrate; subpixels comprising a first-color subpixel, a second-color subpixel, and a third-color subpixel, each including a first-1 color subpixel and a first-2 color subpixel that emit light of the same color, each including a subpixel electrode, a light-emitting layer on the subpixel electrode, and a counter electrode on the light-emitting layer; a bank layer having a lower opening that defines the light-emitting region of each subpixel; a light-shielding layer on the bank layer defining an upper opening superimposed on each of the lower openings; a color filter on the light-shielding layer comprising a first-color color filter, a second-color color filter, and a third-color color filter; and a phase difference pattern layer on the bank layer including a pattern portion corresponding to each subpixel; wherein the pattern portion includes a first-1 color pattern portion corresponding to the first-1 color subpixel and a first-2 color pattern portion corresponding to the first-2 color subpixel, and the first-2 color pattern portion differs from the first-1 color pattern portion in at least one of refractive index and thickness. [Effects of the Invention]

[0008] According to the above embodiment, it is possible to provide a high-resolution display device that improves interference fringes due to ambient light reflection and diffraction when the display is off, while simultaneously providing excellent display quality when the display is on. Needless to say, the scope of the present invention is not limited by such effects. [Brief explanation of the drawing]

[0009] [Figure 1] This is a schematic perspective view showing one or more embodiments of the present invention. [Figure 2] This is a circuit diagram showing a light-emitting diode provided in one of the sub-pixels of a display device according to one or more embodiments of the present invention, and a sub-pixel circuit connected thereto. [Figure 3] This is a schematic cross-sectional view showing a display device according to one or more embodiments of the present invention, and is a cross-sectional view taken along the line A-A' in Figure 1. [Figure 4] This is a schematic cross-sectional view showing a display device according to one or more embodiments of the present invention. [Figure 5] This is a plan view showing the arrangement of subpixels in a part of a display device according to one or more embodiments of the present invention. [Figure 6] This is a schematic cross-sectional view showing a display device according to one or more embodiments of the present invention. [Figure 7] This is a schematic cross-sectional view showing a display device according to one or more embodiments of the present invention. [Figure 8] This is a schematic cross-sectional view showing a display device according to one or more embodiments of the present invention. [Figure 9] This is a schematic cross-sectional view showing a display device according to one or more embodiments of the present invention. [Figure 10] A plan view showing a part of a display device according to one or more embodiments of the present invention. [Modes for carrying out the invention]

[0010] In one embodiment, the second sub-pixel includes a second-first sub-pixel and a second-second sub-pixel that emit light of the same color, and the light reflected from the second-first sub-pixel has a phase difference with the light reflected from the second-second sub-pixel.

[0011] In one embodiment, the third color sub-pixel includes a 3-1 color sub-pixel and a 3-2 color sub-pixel that emit light of the same color as each other, and the light reflected from the 3-1 color sub-pixel has a phase difference from the light reflected from the 3-2 color sub-pixel.

[0012] In one embodiment, the light reflected from the 1-1 color sub-pixel and the light reflected from the 1-2 color sub-pixel have the same wavelength under vacuum conditions.

[0013] In one embodiment, the light reflected from the 1-1 color sub-pixel and the light reflected from the 1-2 color sub-pixel have a phase difference greater than about 0 and less than about 2π.

[0014] In one embodiment, the vertical distance from the substrate to the sub-pixel electrode of the 1-1 color sub-pixel is different from the vertical distance from the substrate to the sub-pixel electrode of the 1-2 color sub-pixel.

[0015] In one embodiment, the vertical distance from the substrate to the sub-pixel electrode of the 2-1 color sub-pixel is different from the vertical distance from the substrate to the sub-pixel electrode of the 2-2 color sub-pixel.

[0016] In one embodiment, the vertical distance from the substrate to the sub-pixel electrode of the 3-1 color sub-pixel is different from the vertical distance from the substrate to the sub-pixel electrode of the 3-2 color sub-pixel.

[0017] In one embodiment, the 1-1 color sub-pixel and the 1-2 color sub-pixel are adjacent to each other, the 2-1 color sub-pixel and the 2-2 color sub-pixel are adjacent to each other, and the 3-1 color sub-pixel and the 3-2 color sub-pixel are adjacent to each other.

[0018] In one embodiment, the display device includes a phase difference pattern layer on the bank layer that includes a pattern portion corresponding to each of the sub-pixels. The pattern portion includes a 1-1 color pattern portion corresponding to the 1-1 color sub-pixel and a 1-2 color pattern portion corresponding to the 1-2 color sub-pixel, and at least one of the refractive index and the thickness of the 1-2 color pattern portion is different from that of the 1-1 color pattern portion.

[0019] In one embodiment, the first primary color pattern portion and the first secondary color pattern portion each contain substances with different refractive indices.

[0020] In one embodiment, the first primary color pattern portion and the first secondary color pattern portion contain the same substance, and the thickness of the first primary color pattern portion is different from the thickness of the first secondary color pattern portion.

[0021] In one embodiment, the first primary color pattern portion and the first secondary color pattern portion each contain substances with different refractive indices, and the thickness of the first primary color pattern portion is different from the thickness of the first secondary color pattern portion.

[0022] In one embodiment, the second sub-pixel includes a second primary color sub-pixel and a second secondary color sub-pixel that emit light of the same color. The light reflected from the second primary color sub-pixel has a phase difference from the light reflected from the second secondary color sub-pixel. The pattern portion further includes a second primary color pattern portion corresponding to the second primary color sub-pixel and a second secondary color pattern portion corresponding to the second secondary color sub-pixel. The second secondary color pattern portion has at least one of a refractive index and a thickness different from that of the second primary color pattern portion.

[0023] [[ID=I19]]In one embodiment, the third sub-pixel includes a third primary color sub-pixel and a third secondary color sub-pixel that emit light of the same color. The light reflected from the third primary color sub-pixel has a phase difference from the light reflected from the third secondary color sub-pixel. The pattern portion further includes a third primary color pattern portion corresponding to the third primary color sub-pixel and a third secondary color pattern portion corresponding to the third secondary color sub-pixel. The third secondary color pattern portion has at least one of a refractive index and a thickness different from that of the third primary color pattern portion.

[0024] In one embodiment, the pattern portions each have a width greater than the width of the corresponding sub-pixel among the sub-pixels.

[0025] In one embodiment, the pattern portion includes an organic insulating material or an inorganic insulating material.

[0026] In one embodiment, the display device further includes a sealing layer on the sub-pixels and the bank layer; and a touch sensor layer on the sealing layer; wherein the phase difference pattern layer is located between the sealing layer and the touch sensor layer.

[0027] In one embodiment, the display device further includes a cover window on the color filter, and the phase difference pattern layer is located between the subpixels and the cover window.

[0028] The present invention can be subjected to various transformations and has a variety of embodiments. Specific embodiments are illustrated in the drawings and described in detail in the detailed description. The effects and features of the present invention, and how they are achieved, will become clear with reference to the embodiments described in detail below, along with the drawings. However, the present invention is not limited to the embodiments disclosed below and can be embodied in a variety of forms.

[0029] In this specification, "A and / or B" means that it is either A, B, or both A and B. Also in this specification, "at least one of A and B" means that it is either A, B, or both A and B.

[0030] In the following embodiments, terms such as "first," "second," etc., are not restrictive but are used to distinguish one component from others.

[0031] In the following embodiments, a singular expression includes multiple expressions unless they imply a clearly different meaning in context.

[0032] In the following embodiments, the meaning of "extending in the first or second direction" includes not only extending in a straight line, but also extending in a zigzag or curved manner, or any combination thereof, along the first or second direction.

[0033] In the following embodiments, terms such as “includes” or “having” mean that the features or components described in the specification are present, and do not preclude the possibility that one or more other features or components may be added.

[0034] In the following embodiments, when a part such as a membrane, region, or component is located above or above another part, this includes not only cases where it is directly above the other part, but also cases where another membrane, region, component, etc. is interposed between them.

[0035] In drawings, the sizes of components may be exaggerated or reduced for illustrative purposes. For example, the sizes and thicknesses of each component shown in the drawings are arbitrarily shown for illustrative purposes, and the present invention is not necessarily limited to those shown.

[0036] Where a particular embodiment can be embodied in a different way, a specific sequence of steps may be performed in a different order than that described. For example, two steps described consecutively may be performed substantially simultaneously, or in the reverse order of the description.

[0037] In the following embodiments, when we say that membranes, regions, components, etc. are connected, this includes not only cases where the membranes, regions, and components are directly connected, but also cases where other membranes, regions, and components are interposed between them to connect them indirectly. For example, in this specification, when we say that membranes, regions, components, etc. are electrically connected, this includes not only cases where the membranes, regions, and components are directly and electrically connected, but also cases where other membranes, regions, and components are interposed between them to connect them indirectly and electrically.

[0038] Figure 1 is a schematic perspective view showing a display device according to one or more embodiments of the present invention.

[0039] Referring to Figure 1, the display device 1 includes a display area DA and a peripheral area NDA outside the display area DA. The display device 1 provides an image through an array of subpixels P arranged two-dimensionally within the display area DA.

[0040] Each subpixel P of the display device 1 is a region capable of emitting light of a corresponding hue, and the display device 1 can provide an image using the light emitted from the subpixels P. For example, each subpixel P emits red, green, blue, or white light.

[0041] Each sub-pixel P emits light of a corresponding hue using a light-emitting diode, such as an organic light-emitting diode. Each organic light-emitting diode emits, for example, red, green, blue, or white light. Each organic light-emitting diode may be connected to a sub-pixel circuit that includes a thin-film transistor and a capacitor.

[0042] The peripheral area NDA is an area that does not provide an image and can completely surround the display area DA (for example, on a plane). The peripheral area NDA may contain drivers or main power lines for providing electrical signals and power to sub-pixel circuits. The peripheral area NDA may also include pads, which are areas where electronic components or printed circuit boards can be electrically connected.

[0043] The display area DA may have a polygonal shape, including a rectangle, as shown in Figure 1. For example, the display area DA may have a rectangular shape where the horizontal length is longer than the vertical length, or a rectangular shape where the horizontal length is shorter than the vertical length, or it may have a square shape. Alternatively, the display area DA may have various shapes such as an ellipse or a circle.

[0044] Display device 1 may include a mobile phone, television, billboard, tablet PC, notebook computer, smartwatch or smart band worn on the wrist, etc.

[0045] Figure 2 is a circuit diagram showing a light-emitting diode and a sub-pixel circuit PC connected thereto, which are provided in one of the sub-pixels of a display device according to one or more embodiments of the present invention.

[0046] Referring to Figure 2, as a light-emitting diode, the organic light-emitting diode (OLED) is connected to the sub-pixel circuit PC. The sub-pixel circuit PC includes a first thin-film transistor T1, a second thin-film transistor T2, and a storage capacitor Cst.

[0047] The second thin-film transistor T2 is a switching thin-film transistor connected to the scan line SL and the data line DL, and transmits the data voltage input from the data line DL to the first thin-film transistor T1 by the switching voltage input from the scan line SL. The storage capacitor Cst is connected to the second thin-film transistor T2 and the drive voltage line PL, and stores a voltage corresponding to the difference between the voltage transmitted from the second thin-film transistor T2 and the drive voltage ELVDD supplied to the drive voltage line PL.

[0048] The first thin-film transistor T1 is a driving thin-film transistor connected to the driving voltage line PL and the storage capacitor Cst, and controls the driving current flowing from the driving voltage line PL to the organic light-emitting diode OLED, corresponding to the voltage value stored in the storage capacitor Cst. The organic light-emitting diode OLED emits light with a predetermined brightness according to the driving current. The sub-pixel electrode (e.g., anode) of the organic light-emitting diode OLED is connected to the sub-pixel circuit PC, and the counter electrode (e.g., cathode) of the organic light-emitting diode OLED is supplied with a common voltage ELVSS.

[0049] Figure 2 illustrates that the sub-pixel circuit includes two thin-film transistors and one storage capacitor, but it goes without saying that in other embodiments, the number of thin-film transistors or storage capacitors can vary considerably depending on the design of the sub-pixel circuit PC.

[0050] Figure 3 is a schematic cross-sectional view showing a display device 1 according to an embodiment of the present invention, and is a cross-sectional view taken along the line A-A' in Figure 1.

[0051] Referring to Figure 3, the display device 1 includes a substrate 100, a display layer 200, a low-reflection layer 300, a sealing layer 400, a touch sensor layer 500, an anti-reflective layer 600, an adhesive layer OCA, and a cover window 700.

[0052] The substrate 100 contains glass or a polymer resin. For example, the polymer resin includes polyethersulfone, polyacrylate, polyetherimide, polyethylene naphthalate, polyethylene terephthalate, polyphenylene sulfide, polyarylate, polyimide, polycarbonate, or cellulose acetate propionate. The substrate 100 containing the polymer resin has flexible, windable, or bendable properties. The substrate 100 has a multi-layer structure including a layer containing the polymer resin and an inorganic layer.

[0053] The display layer 200 includes a light-emitting diode, such as an organic light-emitting diode, a thin-film transistor electrically coupled to it, and an insulating layer interposed between the components of the thin-film transistor.

[0054] A low-reflection layer 300 is located on the display layer 200, and a sealing layer 400 is located on the low-reflection layer 300. For example, the display layer 200 and / or the low-reflection layer 300 may be sealed by the sealing layer 400. In some embodiments, the low-reflection layer 300 may be omitted. In this case, the sealing layer 400 is located directly on the display layer 200. The sealing layer 400 includes at least one inorganic sealing layer and at least one organic sealing layer.

[0055] In some embodiments, the sealing layer 400 may be replaced with a sealing substrate made of glass material. The sealing substrate is located on the display layer 200, and the display layer 200 is interposed between the substrate 100 and the sealing substrate. There may be a gap between the sealing substrate and the display layer 200, but this gap is filled with a filler material.

[0056] A touch sensor layer 500 is located on the sealing layer 400. The touch sensor layer 500 senses an external input, such as a touch from a finger or stylus pen, enabling the display device 1 to acquire coordinate information corresponding to the touch position. The touch sensor layer 500 includes touch electrodes and trace lines connected to the touch electrodes. The touch sensor layer 500 senses external input using either a mutual capacitance method or a self-capacitance method.

[0057] The touch sensor layer 500 may be formed directly on the sealing layer 400. Alternatively, the touch sensor layer 500 may be formed separately and then adhered to the sealing layer 400 via an adhesive layer such as an optically clear adhesive.

[0058] An anti-reflective layer 600 is located on the touch sensor layer 500. The anti-reflective layer 600 can reduce the reflectivity of ambient light incident on the display device 1 from the outside through the cover window 700.

[0059] The anti-reflective layer 600 includes a light-shielding layer and a color filter. The color filter is arranged considering the hue of the light emitted from each of the light-emitting diodes in the display layer 200.

[0060] The cover window 700 is located on the anti-reflective layer 600. The cover window 700 protects the display panel. The cover window 700 may be formed separately and then attached to the anti-reflective layer 600 by an adhesive layer OCA interposed between the cover window 700 and the anti-reflective layer 600. The adhesive layer OCA is, for example, an optically transparent adhesive. Alternatively, the cover window 700 may be formed directly on the anti-reflective layer 600.

[0061] Figure 4 is a schematic cross-sectional view showing a part of a display device according to one or more embodiments of the present invention. The stacked structure of the display device 1 will be described in more detail below with reference to Figure 4.

[0062] Referring to Figure 4, the display device 1 includes a substrate 100, a display layer 200, a sealing layer 400, a touch sensor layer 500, an anti-reflective layer 600, an adhesive layer OCA, and a cover window 700.

[0063] The display device 1 includes a plurality of subpixels arranged in the display area DA (Figure 3). Each of the plurality of subpixels emits red, green, or blue light. The plurality of subpixels may include subpixels of different hues, for example, a first-color subpixel, a second-color subpixel, and a third-color subpixel. There may be multiple first-color subpixels, second-color subpixels, and third-color subpixels. In one or more embodiments, the first-color subpixel is a green subpixel Pg that can emit green light, the second-color subpixel is a blue subpixel Pb that can emit blue light, and the third-color subpixel is a red subpixel Pr that can emit red light.

[0064] The display layer 200 is located on the substrate 100. The display layer 200 includes a sub-pixel circuit layer and a light-emitting diode layer. The sub-pixel circuit layer includes a thin-film transistor TFT and comprises an insulating buffer layer 201, a gate insulating layer 203, an interlayer insulating layer 205, and a planarization layer 207.

[0065] The buffer layer 201 is located on the substrate 100 and can reduce or block the penetration of foreign matter, moisture, or outside air from below the substrate 100, and provides a flat surface on the substrate 100. The buffer layer 201 comprises inorganic materials such as oxides or nitrides, organic materials, or organic-inorganic composites, and consists of a single layer or multilayer structure of inorganic and organic materials. A barrier layer that blocks the penetration of outside air may be further included between the substrate 100 and the buffer layer 201. For example, the buffer layer 201 comprises silicon oxide or silicon nitride.

[0066] A thin-film transistor (TFT) is located on the buffer layer 201. The thin-film transistor (TFT) includes a semiconductor layer ACT, a gate electrode GE, a source electrode SE, and a drain electrode DE. The thin-film transistor (TFT) is coupled to and drives an organic light-emitting diode (LED).

[0067] The semiconductor layer ACT is located on the buffer layer 201. The semiconductor layer ACT comprises polysilicon or amorphous silicon. Alternatively, the semiconductor layer ACT comprises an oxide of at least one substance selected from the group including indium (In), gallium (Ga), tin (Sn), zirconium (Zr), vanadium (V), hafnium (Hf), cadmium (Cd), germanium (Ge), chromium (Cr), titanium (Ti), and zinc (Zn). The semiconductor layer ACT comprises a channel region and impurity-doped source and drain regions.

[0068] The gate electrode GE, source electrode SE, and drain electrode DE are formed from a variety of conductive materials. In one or more embodiments, the gate electrode GE includes at least one of molybdenum (Mo), aluminum (Al), copper (Cu), and titanium (Ti). For example, the gate electrode GE is a single layer of molybdenum (Mo) or a three-layer structure including a molybdenum (Mo) layer, an aluminum (Al) layer, and a molybdenum (Mo) layer. In one or more embodiments, the source electrode SE and drain electrode DE include at least one material selected from the group including copper (Cu), titanium (Ti), and aluminum (Al). For example, the source electrode SE and drain electrode DE may have a three-layer structure including a titanium (Ti) layer, an aluminum (Al) layer, and a titanium (Ti) layer.

[0069] On the other hand, in order to ensure insulation between the semiconductor layer ACT and the gate electrode GE, a gate insulating layer 203 may be placed between the semiconductor layer ACT and the gate electrode GE. An interlayer insulating layer 205 is located above the gate electrode GE, and the source electrode SE and drain electrode DE are located on the interlayer insulating layer 205.

[0070] The gate insulating layer 203 and the interlayer insulating layer 205 each contain an inorganic material such as silicon oxide, silicon nitride, and / or silicon oxynitride. The gate insulating layer 203 and the interlayer insulating layer 205 can be formed, for example, by chemical vapor deposition (CVD) or atomic layer deposition (ALD).

[0071] A planarization layer 207 is located on the thin-film transistor TFT. To provide a flat upper surface, chemical and mechanical polishing can be performed on the upper surface of the planarization layer 207 after its formation. The planarization layer 207 includes general-purpose polymers such as photosensitive polyimide, polyimide, polystyrene (PS), polycarbonate (PC), BCB (Benzocyclobutene), HMDSO (Hexamethyldisiloxane), polymethyl methacrylate (PMMA), and polystyrene (PS), polymer derivatives having a phenolic group, acrylic polymers, imide polymers, aryl ether polymers, amide polymers, fluorine polymers, p-xylene polymers, or vinyl alcohol polymers. In Figure 4, the planarization layer 207 is shown as a single layer, but in some embodiments, the planarization layer 207 may consist of multiple layers. The sub-pixel electrodes 210G, 210B, and 210R of the first to third organic light-emitting diodes OLED1, OLED2, and OLED3, respectively, can be electrically connected to the thin-film transistor TFT via the contact holes of the planarization layer 207.

[0072] The light-emitting diode layer is located on the sub-pixel circuit layer. In one or more embodiments, the light-emitting diode layer includes first to third organic light-emitting diodes OLED1, OLED2, OLED3, a bank layer 225, and a spacer 227.

[0073] The first to third organic light-emitting diodes OLED1, OLED2, and OLED3 may be arranged on a sub-pixel circuit layer. The first organic light-emitting diode OLED1 includes a sub-pixel electrode 210G, an intermediate layer 220G including a first common layer 221, an emissive layer 222G, and a second common layer 223, and a counter electrode 230. The second organic light-emitting diode OLED2 includes a sub-pixel electrode 210B, an intermediate layer 220B including a first common layer 221, an emissive layer 222B, and a second common layer 223, and a counter electrode 230. The third organic light-emitting diode OLED3 includes a sub-pixel electrode 210R, an intermediate layer 220R including a first common layer 221, an emissive layer 222R, and a second common layer 223, and a counter electrode 230.

[0074] The sub-pixel electrodes 210G, 210B, and 210R are located on the planarization layer 207. The sub-pixel electrodes 210G, 210B, and 210R are spaced apart from each other.

[0075] Sub-pixel electrodes 210G, 210B, and 210R are reflective electrodes. Sub-pixel electrodes 210G, 210B, and 210R comprise a reflective film containing silver (Ag), magnesium (Mg), aluminum (Al), platinum (Pt), palladium (Pd), gold (Au), nickel (Ni), neodymium (Nd), iridium (Ir), chromium (Cr), and compounds thereof, and a transparent or translucent conductive layer formed on the reflective film. The transparent or translucent conductive layer contains at least one substance selected from the group including indium tin oxide (ITO), indium zinc oxide (IZO), zinc oxide (ZnO), indium oxide (In2O3), indium gallium oxide (IGO), and aluminum zinc oxide (AZO).

[0076] A bank layer 225 is located on the sub-pixel electrodes 210G, 210B, and 210R. The bank layer 225 is superimposed on the sub-pixel electrodes 210G, 210B, and 210R, and the sub-pixel electrodes 210G, 210B, and 210R may have (or be defined) first to third lower openings 225OP1, 225OP2, and 225OP3 that expose their respective central portions. The bank layer 225 covers the edges of the sub-pixel electrodes 210G, 210B, and 210R, increasing the distance between the edges of the sub-pixel electrodes 210G, 210B, and 210R and the counter electrode 230, thereby reducing or preventing the possibility of arcs or other issues occurring at the edges of the sub-pixel electrodes 210G, 210B, and 210R.

[0077] The first to third lower openings 225OP1, 225OP2, and 225OP3 of the bank layer 225 define the first to third light-emitting regions EA1, EA2, and EA3 of the first to third organic light-emitting diodes OLED1, OLED2, and OLED3 contained in each subpixel. As shown in Figure 4, the bank layer 225 includes a first lower opening 225OP1 that defines the first light-emitting region EA1 of the first organic light-emitting diode OLED1 of the first subpixel. The bank layer 225 may also include a second lower opening 225OP2 that defines the second light-emitting region EA2 of the second organic light-emitting diode OLED2 of the second subpixel. The bank layer 225 may also include a third lower opening 225OP3 that defines the third light-emitting region EA3 of the third organic light-emitting diode OLED3 of the third subpixel.

[0078] The bank layer 225 includes an organic insulator. Alternatively, the bank layer 225 may include an inorganic insulator such as silicon nitride or silicon oxide. In some embodiments, the bank layer 225 may include both an organic insulator and an inorganic insulator.

[0079] In one or more embodiments, the bank layer 225 includes a light-shielding material. For example, the light-shielding material of the bank layer 225 is black. The light-shielding material includes carbon black, carbon nanotubes, resins or pastes containing black dyes, metal particles such as nickel, aluminum, molybdenum, and their alloys, metal oxide particles or metal nitride particles, etc. When the bank layer 225 includes a light-shielding material, external light reflection by a metal structure placed below the bank layer 225 can be reduced.

[0080] A spacer 227 is located on the bank layer 225. The spacer 227 contains an organic insulator such as polyimide. The spacer 227 contains an inorganic insulator such as silicon nitride or silicon oxide, or contains both an organic insulator and an inorganic insulator. In one or more embodiments, the spacer 227 contains a different material from the bank layer 225 containing the aforementioned light-shielding material, and may be formed in separate processes.

[0081] In one or more embodiments, the spacer 227 contains the same material as the bank layer 225. In this case, the bank layer 225 and the spacer 227 may be formed together in a masking process using a half-tone mask or the like.

[0082] An intermediate layer is located on the sub-pixel electrodes 210G, 210B, 210R and the bank layer 225. As mentioned above, the intermediate layer may include a first common layer 221, an emissive layer, and a second common layer 223. The light-emitting layers 222G, 222B, and 222R may be located inside the first to third lower openings 225OP1, 225OP2, and 225OP3 of the bank layer 225, respectively. The light-emitting layers 222G, 222B, and 222R may be organic materials containing fluorescent or phosphorescent substances that can emit green, blue, or red light. The aforementioned organic materials may be low-molecular-weight or high-molecular-weight organic materials.

[0083] Below and above the light-emitting layers 222G, 222B, and 222R are a first common layer 221 and a second common layer 223, respectively. The first common layer 221 includes, for example, a hole transport layer (HTL) or a hole transport layer and a hole injection layer (HIL). The second common layer 223 includes, for example, an electron transport layer (ETL) or an electron transport layer and an electron injection layer (EIL). In one or more embodiments, the second common layer 223 may not be provided.

[0084] The light-emitting layers 222G, 222B, or 222R are arranged for each sub-pixel so as to correspond to the first to third lower openings 225OP1, 225OP2, and 225OP3 of the bank layer 225, while the first common layer 221 and the second common layer 223 may each be integrally formed to cover the substrate 100 as a whole. In other words, the first common layer 221 and the second common layer 223 may each be integrally formed to cover the display area DA of the substrate 100 as a whole.

[0085] The counter electrode 230 is a cathode, which is an electron injection electrode. Such a counter electrode 230 contains a conductive material with a low work function. For example, the counter electrode 230 may contain a (semi)transparent layer containing silver (Ag), magnesium (Mg), aluminum (Al), platinum (Pt), palladium (Pd), gold (Au), nickel (Ni), neodymium (Nd), iridium (Ir), chromium (Cr), lithium (Li), calcium (Ca), or alloys thereof. Alternatively, the counter electrode 230 may further contain a layer of ITO, IZO, ZnO, or In2O3 on top of the (semi)transparent layer containing the aforementioned materials.

[0086] In one or more embodiments, a capping layer 240 may be further located on the display layer 200. The capping layer 240 is located on the first to third organic light-emitting diodes OLED1, OLED2, and OLED3. In one or more embodiments, the capping layer 240 can enhance the luminous efficiency of the first to third organic light-emitting diodes OLED1, OLED2, and OLED3 through reinforcement interference.

[0087] The capping layer 240 may be an organic capping layer containing organic matter, an inorganic capping layer containing inorganic matter, or a composite capping layer containing both organic and inorganic matter. For example, the capping layer 240 may contain carbocyclic compounds, heterocyclic compounds, amino group-containing compounds, porphine derivatives, phthalocyanine derivatives, naphthalocyanine derivatives, alkali metal complexes, alkaline earth metal complexes, or any combination thereof. Carbocyclic compounds, heterocyclic compounds, and amino group-containing compounds may be selectively substituted with substituents containing O, N, S, Se, Si, F, Cl, Br, I, or any combination thereof.

[0088] A sealing layer 400 is located on the capping layer 240. The sealing layer 400 includes at least one inorganic sealing layer and at least one organic sealing layer. For example, as shown in Figure 4, the sealing layer 400 includes a first inorganic sealing layer 410, an organic sealing layer 420, and a second inorganic sealing layer 430 that are stacked sequentially.

[0089] The first inorganic encapsulation layer 410 and the second inorganic encapsulation layer 430 include an inorganic insulator such as silicon oxide, silicon nitride, silicon oxynitride, aluminum oxide, titanium oxide, tantalum oxide, hafnium oxide, or zinc oxide. The first inorganic encapsulation layer 410 and the second inorganic encapsulation layer 430 may be a single layer or a multi-layer structure containing the aforementioned inorganic insulator.

[0090] The organic encapsulation layer 420 can alleviate internal stress in the first inorganic encapsulation layer 410 and / or the second inorganic encapsulation layer 430. The organic encapsulation layer 420 contains polymer-based materials. For example, the organic encapsulation layer 420 contains polyethylene terephthalate, polyethylene naphthalate, polycarbonate, polyimide, polyethylene sulfonate, polyoxymethylene, polyarylate, hexamethyldisiloxane, acrylic resins (e.g., polymethyl methacrylate, polyacrylic acid, etc.) or any combination thereof.

[0091] The sealing layer 400 has a multi-layer structure consisting of a first inorganic sealing layer 410, an organic sealing layer 420, and a second inorganic sealing layer 430. In this case, even if a crack occurs within the sealing layer 400, the crack may not propagate between the first inorganic sealing layer 410 and the organic sealing layer 420, or between the organic sealing layer 420 and the second inorganic sealing layer 430. The sealing layer 400 can prevent, reduce, or minimize the penetration of external moisture, oxygen, etc., into the display area DA.

[0092] The touch sensor layer 500 is located on the sealing layer 400. The touch sensor layer 500 includes a first touch electrode MT1, a first touch insulating layer 510, a second touch electrode MT2, and a second touch insulating layer 520. The first touch electrode MT1 may be located directly on the sealing layer 400. For example, the first touch electrode MT1 may be located directly on the second inorganic sealing layer 430 of the sealing layer 400. However, the present invention is not limited thereto.

[0093] In one or more embodiments, the touch sensor layer 500 includes an insulating layer interposed between the first touch electrode MT1 and the sealing layer 400. In this case, the insulating layer is located on the second inorganic sealing layer 430 of the sealing layer 400, and can flatten the surface on which the first touch electrode MT1 and the like are placed. The insulating layer includes an inorganic insulator such as silicon oxide, silicon nitride, or silicon oxynitride. In some embodiments, the insulating layer may include an organic insulator.

[0094] A first touch insulating layer 510 is located on the first touch electrode MT1. The first touch insulating layer 510 is made of inorganic or organic material. If the first touch insulating layer 510 is made of inorganic material, it may include at least one substance selected from the group including silicon nitride, aluminum nitride, zirconium nitride, titanium nitride, hafnium nitride, tantalum nitride, silicon oxide, aluminum oxide, titanium oxide, tin oxide, cerium oxide, and silicon oxynitride. If the first touch insulating layer 510 is made of organic material, it may include at least one substance selected from the group including acrylic resin, methacrylic resin, polyisoprene, vinyl resin, epoxy resin, urethane resin, cellulose resin, and perylene resin.

[0095] A second touch electrode MT2 is located on the first touch insulating layer 510. The second touch electrode MT2 can act as a sensor that detects user touch input. The first touch electrode MT1 can act as a connecting part that connects the patterned second touch electrode MT2 in one direction. In one or more embodiments, both the first touch electrode MT1 and the second touch electrode MT2 can act as sensors. In this case, the first touch electrode MT1 and the second touch electrode MT2 can be electrically connected via contact holes. When both the first touch electrode MT1 and the second touch electrode MT2 act as sensors, the resistance of the touch electrodes is reduced, allowing for faster detection of user touch input.

[0096] In one or more embodiments, the first touch electrode MT1 and the second touch electrode MT2 have a structure, such as a mesh structure, that allows light emitted from the organic light-emitting diodes OLED1, OLED2, and OLED3 to pass through. In this case, the first touch electrode MT1 and the second touch electrode MT2 may be arranged so as not to overlap with the light-emitting regions EA1, EA2, and EA3 of the organic light-emitting diodes OLED1, OLED2, and OLED3.

[0097] The first touch electrode MT1 and the second touch electrode MT2 include a metal layer or a transparent conductive layer. The metal layer includes molybdenum (Mo), silver (Ag), titanium (Ti), copper (Cu), aluminum (Al), and alloys thereof. The transparent conductive layer includes transparent conductive oxides such as ITO (indium tin oxide), IZO (indium zinc oxide), ZnO (zinc oxide), ITZO (indium tin zinc oxide), conductive polymers such as PEDOT, metal nanowires, carbon nanotubes, or graphene.

[0098] A second touch insulating layer 520 is located on the second touch electrode MT2. The second touch insulating layer 520 is made of inorganic or organic material. If the second touch insulating layer 520 is made of inorganic material, it may contain at least one substance selected from the group including silicon nitride, aluminum nitride, zirconium nitride, titanium nitride, hafnium nitride, tantalum nitride, silicon oxide, aluminum oxide, titanium oxide, tin oxide, cerium oxide, and silicon oxynitride. If the second touch insulating layer 520 is made of organic material, it may contain at least one substance selected from the group including acrylic resin, methacrylic resin, polyisoprene, vinyl resin, epoxy resin, urethane resin, cellulose resin, and perylene resin.

[0099] In some embodiments, the touch sensor layer 500 includes a first touch electrode MT1, a first touch insulating layer 510, and a second touch electrode MT2, but may not include a second touch insulating layer 520. In this case, the anti-reflective layer 600 may be provided in a structure that covers the second touch electrode MT2.

[0100] An anti-reflective layer 600 is located on the touch sensor layer 500. The anti-reflective layer 600 includes a light-shielding layer 610 and a plurality of color filters. In one or more embodiments, the anti-reflective layer 600 includes first to third color filters 620G, 620B, and 620R of different phases corresponding to the first to third organic light-emitting diodes OLED1, OLED2, and OLED3, respectively. There may be a plurality of first to third color filters 620G, 620B, and 620R.

[0101] The light-shielding layer 610 has (or defines) first to third upper openings 610OP1, 610OP2, and 610OP3, respectively, corresponding to the first to third sub-pixels. The light-shielding layer 610 includes a first upper opening 610OP1 corresponding to the first light-emitting region EA1, a second upper opening 610OP2 corresponding to the second light-emitting region EA2, and a third upper opening 610OP3 corresponding to the third light-emitting region EA3. Light emitted from the first to third organic light-emitting diodes OLED1, OLED2, and OLED3 is emitted to the outside through the first to third upper openings 610OP1, 610OP2, and 610OP3 of the light-shielding layer 610.

[0102] The first upper opening 610OP1 of the light-shielding layer 610 overlaps with the first lower opening 225OP1 of the bank layer 225, the second upper opening 610OP2 overlaps with the second lower opening 225OP2, and the third upper opening 610OP3 overlaps with the third lower opening 225OP3.

[0103] In this specification, the width (or size) of each subpixel means the width (or size) of the light-emitting region of the organic light-emitting diode embodying each subpixel, and the width (or size) of the light-emitting region may be defined by the width (or size) of the lower opening provided in the bank layer 225.

[0104] In one or more embodiments, the width (or size) of each of the first to third upper openings 610OP1, 610OP2, and 610OP3 of the light-shielding layer 610 may be larger than the width (or size) of the corresponding subpixel among the first to third subpixels. That is, the width (or size) of the first to third upper openings 610OP1, 610OP2, and 610OP3 of the light-shielding layer 610 is larger than the size (or width) of the corresponding first to third lower openings 225OP1, 225OP2, and 225OP3 of the corresponding bank layer 225.

[0105] In one or more embodiments, the widths (or sizes) of the first to third upper openings 610OP1, 610OP2, and 610OP3 of the light-shielding layer 610 may be substantially the same as the widths (or sizes) of the corresponding subpixels among the first to third subpixels. That is, the widths (or sizes) of the first to third upper openings 610OP1, 610OP2, and 610OP3 of the light-shielding layer 610 are substantially the same as the widths (or sizes) of the corresponding first to third lower openings 225OP1, 225OP2, and 225OP3 of the corresponding bank layer 225.

[0106] The light-shielding layer 610 includes an organic insulator. Alternatively, the light-shielding layer 610 may include an inorganic insulator such as silicon nitride or silicon oxide. In some embodiments, the light-shielding layer 610 may include both an organic insulator and an inorganic insulator.

[0107] In one or more embodiments, the light-shielding layer 610 includes a light-shielding material. For example, the light-shielding material of the light-shielding layer 610 is black. The light-shielding material includes carbon black, carbon nanotubes, resins or pastes containing black dyes, metal particles such as nickel, aluminum, molybdenum, and their alloys, metal oxide particles, or metal nitride particles. Because the light-shielding layer 610 includes a light-shielding material, it can reduce external light reflection caused by metal structures located beneath it.

[0108] First to third color filters 620G, 620B, and 620R may be placed in the first to third upper openings 610OP1, 610OP2, and 610OP3 of the light-shielding layer 610, respectively. The first to third color filters 620G, 620B, and 620R have colors corresponding to the light emitted from the first to third light-emitting regions EA1, EA2, and EA3. In one or more embodiments, when green light is emitted from the first light-emitting region EA1, the first color filter 620G is a green color filter; when blue light is emitted from the second light-emitting region EA2, the second color filter 620B is a blue color filter; and when red light is emitted from the third light-emitting region EA3, the third color filter 620R is a red color filter.

[0109] The anti-reflective layer 600 further includes an overcoat layer 630. The overcoat layer 630 is located on the light-shielding layer 610 and the first to third color filters 620G, 620B, and 620R. The overcoat layer 630 flattens the upper surfaces of the light-shielding layer 610 and the first to third color filters 620G, 620B, and 620R. The overcoat layer 630 is a colorless, translucent layer that does not have any visible light band color. The overcoat layer 630 contains a colorless, light-emitting organic material such as an acrylic resin.

[0110] A cover window 700 is located on the overcoat layer 630 via an adhesive layer OCA.

[0111] Figure 5 is a plan view showing the arrangement of subpixels in a part of a display device according to one or more embodiments of the present invention.

[0112] Referring to Figure 5, the subpixels of the display device include a first-color subpixel, a second-color subpixel, and a third-color subpixel. In one or more embodiments, the first-color subpixel is a green subpixel Pg, the second-color subpixel is a blue subpixel Pb, and the third-color subpixel is a red subpixel Pr. The following explanation assumes that the first-color subpixel is a green subpixel Pg, the second-color subpixel is a blue subpixel Pb, and the third-color subpixel is a red subpixel Pr.

[0113] The red subpixel Pr, blue subpixel Pb, and green subpixel Pg may have a repeating array structure. The red subpixel Pr and blue subpixel Pb can be placed at the vertices of a virtual square VS1 with either one of the green subpixels Pg as its center point. The red subpixel Pr can be placed at opposite vertices of the virtual square VS1, flanking the green subpixel Pg along the diagonal direction, and the blue subpixel Pb can be placed at opposite vertices of the virtual square VS1, flanking the green subpixel Pg along the diagonal direction. In addition, the green subpixel Pg can be placed at the vertices of a virtual square VS2 with a subpixel (either blue subpixel Pb or red subpixel Pr) located at either vertex of the virtual square VS1 as its center point. In this case, the virtual squares VS1 and VS2 can be transformed into various shapes such as rectangles, rhombuses, and squares.

[0114] In other words, the subpixel arrangement in Figure 5 can be expressed as follows: the red subpixel Pr, the blue subpixel Pb, and the green subpixel Pg are in a pentile (PENTILE) configuration. TM ) Structure (e.g., RGBG matrix structure, Pentile (PENTILE) TM ) Matrix structure, or RGBG structure, Pentile (PENTILE TM ) is a registered trademark of Samsung Display Co., Ltd. of the Republic of Korea, and may be arranged, for example, as a diamond pentile structure. However, the present invention is not limited to these. For example, the red subpixel Pr, blue subpixel Pb, and green subpixel Pg may be arranged as a stripe structure. In addition, in some embodiments, the red subpixel Pr, blue subpixel Pb, and green subpixel Pg may be arranged as various subpixel array structures such as a mosaic structure and a delta structure.

[0115] The red subpixel Pr, blue subpixel Pb, and green subpixel Pg have a circular shape. However, the present invention is not limited to these. In some embodiments, the red subpixel Pr, blue subpixel Pb, and green subpixel Pg may have an elliptical or polygonal shape. The polygonal shape includes a form with rounded vertices.

[0116] The sizes (or widths) of the red subpixel Pr, blue subpixel Pb, and green subpixel Pg may differ from each other. For example, the size (or width) of the green subpixel Pg may be smaller than that of the red subpixel Pr and blue subpixel Pb. The size (or width) of the blue subpixel Pb may be larger than that of the red subpixel Pr. Various other modifications are possible, such as the sizes of the red subpixel Pr, blue subpixel Pb, and green subpixel Pg being substantially identical in other embodiments.

[0117] The subpixels of the display device include a repeating array structure of corresponding subpixel pattern unit blocks UB1. For example, the array of red subpixels Pr, blue subpixels Pb, and green subpixels Pg corresponds to a repeating array of corresponding subpixel pattern unit blocks UB1. The subpixel pattern unit block UB1 can be understood as a virtual unit block having a corresponding area, containing the red subpixels Pr, blue subpixels Pb, and green subpixels Pg, and corresponding to the smallest repeating unit of the subpixel array pattern provided in the display device. In one or more embodiments, the subpixel pattern unit block UB1 is rectangular. For example, the subpixel pattern unit block UB1 is square.

[0118] The subpixel pattern unit block UB1 contains red subpixels Pr, blue subpixels Pb, and green subpixels Pg, but the sum of the number of red subpixels Pr and blue subpixels Pb contained in the subpixel pattern unit block UB1 is the same as the number of green subpixels Pg. Figure 5 shows a subpixel pattern unit block UB1 having 2 red subpixels Pr, 2 blue subpixels Pb, and 4 green subpixels Pg.

[0119] Referring to Figure 4, the display device 1 of the present invention includes a light-shielding layer 610 and an anti-reflective layer 600 including first to third color filters 620G, 620B, and 620R. In this case, the light efficiency is preferable compared to the case where the anti-reflective layer 600 includes a polarizing film disposed on the front surface of the substrate 100, but the amount of light reflected by each sub-pixel (e.g., the sub-pixel electrode or counter electrode of each sub-pixel) increases relatively. Therefore, interference fringes due to diffraction of light reflected from each sub-pixel of the display device 1 increase. Such interference fringes are visible when the display device 1 is off-state, and if the interference fringes increase, the quality of the display device 1 in the off-state deteriorates, such as the appearance of double images. Furthermore, the interference fringes can vary depending on the shape of the sub-pixels and the spacing between sub-pixels. For example, in a high-resolution display device 1, the spacing between sub-pixels is small, so interference fringes due to diffraction of light reflected from each sub-pixel increase.

[0120] However, the display device 1 of the present invention can have a double image reduction effect comparable to that of a low-resolution display device in a high-resolution display device 1 by ensuring that at least a portion of the reflected light that generates interference fringes has a corresponding phase difference. For example, interference fringes can be generated by light reflected from sub-pixels of the same hue, such as light reflected from a green sub-pixel Pg, light reflected from a red sub-pixel Pr, or light reflected from a blue sub-pixel Pb. Furthermore, sub-pixels of the same hue that generate interference fringes can be arranged adjacent to each other. The display device 1 of the present invention includes a phase difference pattern structure such that at least a portion of the light reflected from such sub-pixels of the same hue has a corresponding phase difference.

[0121] Referring to the subpixel array structure in Figure 5, for example, at least some of the light reflected from the four green subpixels Pg, each positioned at each vertex of a virtual square VSG with one blue subpixel Pb as its center point, has different phases. At least some of the light reflected from the four blue subpixels Pb, each positioned at each vertex of a virtual square VSB with one red subpixel Pr as its center point, has different phases. Also, at least some of the light reflected from the four red subpixels Pr, each positioned at each vertex of a virtual square VSR with one blue subpixel Pb as its center point, has different phases.

[0122] The phase difference pattern structure included in the display device 1 of the present invention will be specifically described with reference to Figures 6 to 9, which will be described later.

[0123] Figure 6 is a schematic cross-sectional view showing a portion of a display device according to one or more embodiments of the present invention. The phase difference pattern structure will be described below with reference to the green subpixel Pg. However, the same structure can be applied to the red subpixel Pr and the blue subpixel Pb, and overlapping explanations will be omitted.

[0124] Referring to Figure 6, in one or more embodiments, the subpixels of the display device 1 include a first green subpixel Pg1 and a second green subpixel Pg2. The first green subpixel Pg1 and the second green subpixel Pg2 are arranged adjacent to each other. In one or more embodiments, the first green subpixel Pg1 is also called the 1-1 color subpixel, and the second green subpixel Pg2 is also called the 1-2 color subpixel.

[0125] Each of the first green subpixel Pg1 and the second green subpixel Pg2 includes a subpixel electrode 210G, an intermediate layer 220G, and a counter electrode 230 that constitute the first organic light-emitting diode OLED1. The light reflected from each subpixel may be light reflected by the metal layer of each subpixel, for example, the subpixel electrode or the counter electrode. For example, the first light L1 is light reflected from the subpixel electrode 210G of the first green subpixel Pg1. The second light L2 is light reflected from the subpixel electrode 210G of the second green subpixel Pg2.

[0126] The vertical distance h1 from the substrate 100 to the sub-pixel electrode 210G of the first green sub-pixel Pg1 is different from the vertical distance h2 from the substrate 100 to the sub-pixel electrode 210G of the second green sub-pixel Pg2. For example, the vertical distance h1 from the substrate 100 to the sub-pixel electrode 210G of the first green sub-pixel Pg1 is smaller than the vertical distance h2 from the substrate 100 to the sub-pixel electrode 210G of the second green sub-pixel Pg2.

[0127] In one or more embodiments, the thickness of the portion of the planarization layer 207 corresponding to the first green subpixel Pg1 may differ from the thickness of the portion of the planarization layer 207 corresponding to the second green subpixel Pg2. For example, the thickness of the portion of the planarization layer 207 corresponding to the first green subpixel Pg1 is smaller than the thickness of the portion of the planarization layer 207 corresponding to the second green subpixel Pg2.

[0128] In other words, with respect to the substrate 100, the height of the sub-pixel electrode 210G of the first green sub-pixel Pg1 may differ from the height of the sub-pixel electrode 210G of the second green sub-pixel Pg2. For example, the height of the sub-pixel electrode 210G of the first green sub-pixel Pg1 is smaller than the height of the sub-pixel electrode 210G of the second green sub-pixel Pg2. Therefore, the first light L1 and the second light L2 reflected from the sub-pixel electrodes 210G of the first green sub-pixel Pg1 and the second green sub-pixel Pg2 have different travel paths. For example, the travel path of the first light L1 is longer than the travel path of the second light L2.

[0129] Because the heights of the subpixel electrodes 210G of the first green subpixel Pg1 and the second green subpixel Pg2 are different, the thicknesses of the organic encapsulation layer 420 covering the subpixel electrodes 210G of the first green subpixel Pg1 and the second green subpixel Pg2 are different. For example, the thickness d1 of the portion of the organic encapsulation layer 420 corresponding to the first green subpixel Pg1 is greater than the thickness d2 of the portion of the organic encapsulation layer 420 corresponding to the second green subpixel Pg2. In another embodiment, the thickness d1 of the portion of the organic encapsulation layer 420 corresponding to the first green subpixel Pg1 is less than the thickness d2 of the portion of the organic encapsulation layer 420 corresponding to the second green subpixel Pg2.

[0130] In the travel paths of the first light L1 and the second light L2, the thicknesses of the organic sealing layer 420 through which the first light L1 and the second light L2 pass are different. As a result, the first light L1 and the second light L2 may have a phase difference.

[0131] For example, if the first light L1 and the second light L2 have the same wavelength λ under vacuum conditions, and the refractive index of the organic encapsulation layer 420 is n0, then the first light L1 and the second light L2 can have phases as shown in the following equations 1 and 2, respectively, as they pass through the organic encapsulation layer 420.

[0132]

number

[0133]

number

[0134] Here, d1 is the thickness of the portion of the organic encapsulation layer 420 corresponding to the first green subpixel Pg1, and d2 is the thickness of the portion of the organic encapsulation layer 420 corresponding to the second green subpixel Pg2. For example, in one or more embodiments, the thickness d1 of the portion of the organic encapsulation layer 420 corresponding to the first green subpixel Pg1 may be smaller than the thickness d2 of the portion of the organic encapsulation layer 420 corresponding to the second green subpixel Pg2.

[0135] Therefore, the first light L1 reflected from the first green subpixel Pg1 and the second light L2 reflected from the second green subpixel Pg2 may have a phase difference. For example, the first light L1 and the second light L2 may have a phase difference as shown in Equation 3 below.

[0136]

number

[0137] Here, Δd is the difference in thickness of the organic encapsulation layer 420 through which the first light L1 and the second light L2 pass, and this corresponds to the difference in height between the sub-pixel electrode 210G of the first green sub-pixel Pg1 and the sub-pixel electrode 210G of the second green sub-pixel Pg2. In other words, the difference in thickness Δd of the organic encapsulation layer 420 through which the first light L1 and the second light L2 pass corresponds to the difference between the vertical distance h1 from the substrate 100 to the sub-pixel electrode 210G of the first green sub-pixel Pg1 and the vertical distance h2 from the substrate 100 to the sub-pixel electrode 210G of the second green sub-pixel Pg2.

[0138] In one or more embodiments, the first light L1 and the second light L2 passing through the first color filter 620G have a wavelength λ of approximately 550 nm under vacuum conditions. The organic encapsulation layer 420 has a refractive index n0 of approximately 1.495. In this case, if the height difference between the sub-pixel electrodes 210G of the first green sub-pixel Pg1 and the second green sub-pixel Pg2 is designed to be approximately 276 nm, the first light L1 and the second light L2 have a phase difference of approximately π.

[0139] As mentioned above, at least some of the light reflected from each of the multiple green subpixels Pg may have different phases. For ease of explanation, Figure 6 illustrates the case where the first light L1 and the second light L2 reflected from two adjacent green subpixels, for example, the first green subpixel Pg1 and the second green subpixel Pg2, have a phase difference. The same structure can be applied to the red subpixel Pr and the blue subpixel Pb.

[0140] In one or more embodiments, the subpixels include a first blue subpixel and a second blue subpixel arranged adjacent to each other. In one or more embodiments, the first blue subpixel is also called a 2-1 color subpixel, and the second blue subpixel is also called a 2-2 color subpixel. The vertical distance from the substrate 100 to the subpixel electrode of the first blue subpixel is different from the vertical distance from the substrate 100 to the subpixel electrode of the second blue subpixel. In other words, with respect to the substrate 100, the height of the subpixel electrode of the first blue subpixel is different from the height of the subpixel electrode of the second blue subpixel. Light reflected from the first blue subpixel has a phase difference from light reflected from the second blue subpixel.

[0141] In one or more embodiments, the subpixels include a first red subpixel and a second red subpixel arranged adjacent to each other. In one or more embodiments, the first red subpixel is also called the 3-1 color subpixel, and the second red subpixel is also called the 3-2 color subpixel. The vertical distance from the substrate 100 to the subpixel electrode of the first red subpixel is different from the vertical distance from the substrate 100 to the subpixel electrode of the second red subpixel. In other words, with respect to the substrate 100, the height of the subpixel electrode of the first red subpixel is different from the height of the subpixel electrode of the second red subpixel. Light reflected from the first red subpixel has a phase difference from light reflected from the second red subpixel.

[0142] By adjusting the vertical distance from the substrate 100 to the sub-pixel electrode of each sub-pixel, that is, the height of the sub-pixel electrode of each sub-pixel relative to the substrate 100, to be different for sub-pixels having the same hue, it is possible to design the system so that the light reflected from the corresponding sub-pixel has a phase difference.

[0143] Figures 7 to 9 are schematic cross-sectional views showing a display device according to another embodiment of the present invention.

[0144] Referring to Figures 7 to 9, the display device 1 includes a phase difference pattern layer 800. In one or more embodiments, the phase difference pattern layer 800 may be located between the sealing layer 400 and the touch sensor layer 500. However, the present invention is not limited thereto. The phase difference pattern layer 800 may be located between a plurality of subpixels and the cover window 700. For example, it may be located between a plurality of color filters and the cover window 700. In one or more embodiments, the phase difference pattern layer 800 is included as a separate layer. However, the present invention is not limited thereto. For example, the phase difference pattern layer 800 may be included in the adhesive layer OCA.

[0145] The phase difference pattern layer 800 includes a base portion 800a and a plurality of pattern portions 800b corresponding to each subpixel. The base portion 800a may be the remaining portion excluding the plurality of pattern portions 800b. For example, the base portion 800a includes the portion corresponding to the body portion of the light-shielding layer 610. In one or more embodiments, on a plane, the base portion 800a may be arranged to surround each of the plurality of pattern portions 800b. In some embodiments, the base portion 800a covers at least a portion of the plurality of pattern portions 800b, flattening the upper surface of the phase difference pattern layer 800. In one or more embodiments, portions of the plurality of pattern portions 800b and the base portion 800a containing the same material may be integrally provided.

[0146] In one or more embodiments, on a plane, each of the multiple pattern portions 800b has a width (or size) greater than the width (or size) of the corresponding subpixel.

[0147] The phase difference pattern layer 800 contains a transparent material. In one or more embodiments, the phase difference pattern layer 800 contains a transparent organic insulating material or a transparent inorganic insulating material. In one or more embodiments, the phase difference pattern layer 800 contains an organic material with a band gap of about 3.2 eV or more. In one or more embodiments, the phase difference pattern layer 800 contains a material with a refractive index of about 1 to about 2.

[0148] In one or more embodiments, the phase difference pattern layer may be arranged in multiple layers. For example, the phase difference pattern layer may consist of a first phase difference pattern layer and a second phase difference pattern layer stacked in sequence.

[0149] In the following, the phase difference pattern layer 800 will be explained using the green subpixel Pg as the reference. However, the same structure may be applied to the red subpixel Pr and the blue subpixel Pb, and overlapping explanations will be omitted.

[0150] Referring to Figures 7 to 9, the display device 1 includes a first green sub-pixel Pg1 and a second green sub-pixel Pg2. The first green sub-pixel Pg1 and the second green sub-pixel Pg2 are arranged adjacent to each other. In one or more embodiments, the first light L1 is light reflected from the sub-pixel electrode 210G of the first green sub-pixel Pg1. The second light L2 is light reflected from the sub-pixel electrode 210G of the second green sub-pixel Pg2. The vertical distance h1 from the substrate 100 to the sub-pixel electrode 210G of the first green sub-pixel Pg1 is the same as the vertical distance h2 from the substrate 100 to the sub-pixel electrode 210G of the second green sub-pixel Pg2.

[0151] The phase difference pattern layer 800 includes a first green pattern portion 800bg1 corresponding to a first green subpixel Pg1 and a second green pattern portion 800bg2 corresponding to a second green subpixel Pg2. The first green pattern portion 800bg1 and the second green pattern portion 800bg2 differ in at least one of their refractive index and thickness. In one or more embodiments, the first green pattern portion 800bg1 is also called the 1-1 color pattern portion, and the second green pattern portion 800bg2 is also called the 1-2 color pattern portion.

[0152] Referring to Figure 7, in one or more embodiments, the first green pattern portion 800bg1 and the second green pattern portion 800bg2 may contain materials with different refractive indices. The thickness ds1 of the first green pattern portion 800bg1 is the same as the thickness ds2 of the second green pattern portion 800bg2. The thickness ds1 of the first green pattern portion 800bg1 and the thickness ds2 of the second green pattern portion 800bg2 are the same as the thickness d0 of the phase difference pattern layer 800.

[0153] In the travel paths of the first light L1 and the second light L2, the refractive indices of each pattern portion (800b) of the phase difference pattern layer (800) through which the first light L1 and the second light L2 pass are different. As a result, the first light L1 and the second light L2 may have a phase difference.

[0154] For example, the first light L1 and the second light L2 have the same wavelength λ under vacuum conditions, and the thickness ds1 of the first green pattern section 800bg1 and the thickness ds2 of the second green pattern section 800bg2 are the same as the thickness d0 of the phase difference pattern layer. The first light L1 and the second light L2 have phases as shown in the following equations 4 and 5, respectively, as they pass through the phase difference pattern layer 800.

[0155]

number

[0156]

number

[0157] Here, n1 is the refractive index of the first green pattern section 800bg1, and n2 is the refractive index of the second green pattern section 800bg2. The refractive index n1 is different from the refractive index n2. For example, the refractive index n1 is greater than the refractive index n2.

[0158] Therefore, the first light L1 reflected from the first green subpixel Pg1 and the second light L2 reflected from the second green subpixel Pg2 may have a phase difference. For example, the first light L1 and the second light L2 may have a phase difference as shown in equation 6 below.

[0159]

number

[0160] Here, Δn corresponds to the difference in refractive index between the first green pattern section 800bg1 and the second green pattern section 800bg2, through which the first light L1 and the second light L2 pass, respectively.

[0161] In one or more embodiments, the first light L1 and the second light L2 passing through the first color filter 620G have a wavelength λ of approximately 550 nm. The first green pattern portion 800bg1 has a refractive index n1 of 1.9, the same as the base portion 800a, and the second green pattern portion 800bg2 has a refractive index n2 of 1.5. The thickness ds1 of the first green pattern portion 800bg1 and the thickness ds2 of the second green pattern portion 800bg2 are the same as the thickness d0 of the phase difference pattern layer 800. In this case, if the thickness d0 of the phase difference pattern layer 800 is designed to be approximately 343.78 nm, the first light L1 and the second light L2 will have a phase difference of approximately π. If the thickness d0 of the phase difference pattern layer 800 is designed to be approximately 171.9 nm, the first light L1 and the second light L2 will have a phase difference of approximately 0.5π. If the thickness d0 of the phase difference pattern layer 800 is designed to be approximately 515.6 nm, the first light L1 and the second light L2 will have a phase difference of approximately 1.5π. By adjusting the thickness d0 of the phase difference pattern layer 800, the phase difference between the first light L1 and the second light L2 can be adjusted within a range of approximately 0 and less than approximately 2π.

[0162] Referring to Figure 8, in one or more embodiments, the first green pattern portion 800bg1 and the second green pattern portion 800bg2 may contain materials with the same refractive index. The thickness ds1 of the first green pattern portion 800bg1 may differ from the thickness ds2 of the second green pattern portion 800bg2. The thickness ds1 of the first green pattern portion 800bg1 and the thickness ds2 of the second green pattern portion 800bg2 are either the same as or smaller than the thickness d0 of the phase difference pattern layer 800. For example, the thickness ds1 of the first green pattern portion 800bg1 and the thickness ds2 of the second green pattern portion 800bg2 are smaller than the thickness d0 of the phase difference pattern layer 800.

[0163] In the movement paths of the first light L1 and the second light L2, the thickness of each pattern portion 800b of the phase difference pattern layer 800 through which the first light L1 and the second light L2 pass is different. As a result, the first light L1 and the second light L2 may have a phase difference.

[0164] For example, if the first light L1 and the second light L2 have the same wavelength λ under vacuum conditions, the first green pattern portion 800bg1 and the second green pattern portion 800bg2 have the same refractive index n, and the refractive index of the base portion 800a is nb, then the first light L1 and the second light L2 can have phases as shown in the following equations 7 and 8, respectively, while passing through the phase difference pattern layer 800.

[0165]

number

[0166]

number

[0167] Here, ds1 is the thickness of the first green pattern portion 800bg1, and ds2 is the thickness of the second green pattern portion 800bg2. For example, the thickness ds1 of the first green pattern portion 800bg1 is smaller than the thickness ds2 of the second green pattern portion 800bg2. The value of d0-ds1 is also the same as the thickness of a portion 800ag1 of the base portion 800a superimposed on the first green subpixel Pg1, and the value of d0-ds2 is also the same as the thickness of a portion 800ag2 of the base portion 800a superimposed on the second green subpixel Pg2.

[0168] Therefore, the first light L1 reflected from the first green subpixel Pg1 and the second light L2 reflected from the second green subpixel Pg2 may have a phase difference. For example, the first light L1 and the second light L2 may have a phase difference as shown in equation 9 below.

[0169]

number

[0170] Here, Δds corresponds to the difference in thickness between the first green pattern section 800bg1 and the second green pattern section 800bg2, through which the first light L1 and the second light L2 pass, respectively.

[0171] Referring to Figure 9, in one or more embodiments, the first green pattern portion 800bg1 and the second green pattern portion 800bg2 may contain materials with different refractive indices. The thickness ds1 of the first green pattern portion 800bg1 may differ from the thickness ds2 of the second green pattern portion 800bg2. The thickness ds1 of the first green pattern portion 800bg1 and the thickness ds2 of the second green pattern portion 800bg2 are either the same as or less than the thickness d0 of the phase difference pattern layer 800.

[0172] In the travel paths of the first light L1 and the second light L2, the refractive indices and thicknesses of each pattern portion 800b of the phase difference pattern layer 800 through which the first light L1 and the second light L2 pass are different. As a result, the first light L1 and the second light L2 may have a phase difference.

[0173] For example, if the first light L1 and the second light L2 have the same wavelength λ under vacuum conditions, they can have phases as shown in equations 10 and 11 below as they pass through the phase difference pattern layer 800.

[0174]

number

[0175]

number

[0176] Here, n1 is the refractive index of the first green pattern portion 800bg1, and n2 is the refractive index of the second green pattern portion 800bg2. The refractive index n1 is different from the refractive index n2. For example, the refractive index n1 is greater than the refractive index n2. Also, ds1 is the thickness of the first green pattern portion 800bg1, and ds2 is the thickness of the second green pattern portion 800bg2. For example, the thickness ds1 of the first green pattern portion 800bg1 is smaller than the thickness ds2 of the second green pattern portion 800bg2. The value of d0-ds1 is the same as the thickness of a portion 800ag1 of the base portion 800a superimposed on the first green sub-pixel Pg1, and the value of d0-ds2 is the same as the thickness of a portion 800ag2 of the base portion 800a superimposed on the second green sub-pixel Pg2.

[0177] Therefore, the first light L1 reflected from the first green subpixel Pg1 and the second light L2 reflected from the second green subpixel Pg2 may have a phase difference. For example, the first light L1 and the second light L2 may have a phase difference as shown in equation 12 below.

[0178]

number

[0179] As mentioned above, at least some of the light reflected from each of the multiple green subpixels Pg may have different phases. For ease of explanation, Figures 7 to 9 illustrate the case where the first light L1 and the second light L2 reflected from two adjacent green subpixels, the first green subpixel Pg1 and the second green subpixel Pg2, have a phase difference. The same structure can be applied to the red subpixel Pr and the blue subpixel Pb.

[0180] In one or more embodiments, the subpixels include a first blue subpixel and a second blue subpixel arranged adjacent to each other. The multiple pattern portions of the phase difference pattern layer 800 include a first blue pattern portion corresponding to the first blue subpixel and a second blue pattern portion corresponding to the second blue subpixel. The first blue pattern portion and the second blue pattern portion differ in at least one of their refractive index and thickness. The light reflected from the first blue subpixel has a phase difference from the light reflected from the second blue subpixel. In one or more embodiments, the first blue pattern portion is also called the 2-1 color pattern portion, and the second blue pattern portion is also called the 2-2 color pattern portion.

[0181] In one or more embodiments, the subpixels include a first red subpixel and a second red subpixel arranged adjacent to each other. The multiple pattern portions of the phase difference pattern layer 800 include a first red pattern portion corresponding to the first red subpixel and a second red pattern portion corresponding to the second red subpixel. The first red pattern portion and the second red pattern portion differ in at least one of their refractive index and thickness. The light reflected from the first red subpixel has a phase difference from the light reflected from the second red subpixel. In one or more embodiments, the first red pattern portion is also called the 3-1 color pattern portion, and the second red pattern portion is also called the 3-2 color pattern portion.

[0182] According to the embodiments shown in Figures 7 to 9, by making at least one of the refractive indices and thicknesses of each pattern portion 800b of the phase difference pattern layer 800 through which light reflected from subpixels having the same hue passes, the light reflected from the subpixels can be made to have a phase difference.

[0183] Figure 10 is a plan view showing a part of a display device according to one or more embodiments of the present invention. Figure 10 is an illustrative drawing showing a design in which the light reflected from each of the multiple subpixels has a phase difference, using the phase difference pattern structure described above with reference to Figures 6 to 9.

[0184] Referring to Figure 10, for example, the light reflected from the second red subpixel Pr2' has a phase difference of 0.5π relative to the light reflected from the first red subpixel Pr1'. The light reflected from the second blue subpixel Pb2' has a phase difference of 0.5π relative to the light reflected from the first blue subpixel Pb1'. The light reflected from the second green subpixel Pg2' has a phase difference of approximately 0.5π relative to the light reflected from the first green subpixel Pg1'.

[0185] In Figure 10, the light reflected from subpixels of the same hue is designed to have a phase difference of approximately 0 or approximately 0.5π from each other. However, the present invention is not limited thereto. In other embodiments, the light reflected from subpixels of the same hue may be designed to have a phase difference of approximately 0, approximately 0.5π, approximately 1π, or approximately 1.5π.

[0186] At least some of the light reflected from each of the four green subpixels located at each vertex of the virtual square VSG has a phase difference of approximately 0.5π. At least some of the light reflected from each of the four blue subpixels located at each vertex of the virtual square VSB has a phase difference of approximately 0.5π. In addition, at least some of the light reflected from each of the four red subpixels Pr located at each vertex of the virtual square VSR has a phase difference of approximately 0.5π.

[0187] This invention reduces interference fringes generated by light reflected from subpixels of the same hue by adjusting the phase difference of the light reflected from each subpixel at different positions using a phase difference pattern structure. The phase difference pattern can be designed in an optimal form that reduces or minimizes interference fringes.

[0188] The phase difference pattern structure corresponding to multiple subpixels included in the display device includes a repeating array structure of phase difference pattern unit blocks UB2. The phase difference pattern unit block UB2 is a virtual unit block having a corresponding area, containing phase difference pattern structures corresponding to red subpixels, blue subpixels, and green subpixels, respectively, and can be understood as corresponding to the smallest repeating unit of the array pattern of the phase difference pattern structure provided in the display device. In one or more embodiments, the phase difference pattern unit block UB2 is rectangular. For example, the phase difference pattern unit block UB2 is square.

[0189] The size of the phase difference pattern unit block UB2 is larger than the size of the subpixel pattern unit block UB1. The subpixels corresponding to the phase difference pattern unit block UB2 have a structure in which K subpixel pattern unit blocks (where K is a natural number greater than 0) are arranged along a first direction (e.g., the x-direction) and K subpixel pattern unit blocks (where K is a natural number greater than 0) are arranged along a second direction (e.g., the y-direction) orthogonal to the first direction.

[0190] According to the embodiments described above, it is possible to provide a high-resolution display device that improves interference fringes due to ambient light reflection and diffraction when the display is off, while simultaneously providing excellent display quality when the display is on. However, the scope of the present invention is not limited by such effects.

[0191] Thus, the present invention has been described by reference to the embodiments illustrated in the drawings, but these are merely illustrative, and those skilled in the art will understand that a wide variety of modifications and variations of embodiments are possible. Therefore, the true scope of technical protection of the present invention must be determined by the technical idea of ​​the attached claims.

Claims

1. circuit board and Each emits light of the same color, and the light reflected from the 1-1 subpixel has a phase difference with the light reflected from the 1-2 subpixel, and the 1st subpixel includes the 1-1 subpixel and the 1-2 subpixel. Second color subpixel and, It comprises a third sub-pixel and Each of these sub-pixels includes a sub-pixel electrode, a light-emitting layer on the sub-pixel electrode, and a counter electrode on the light-emitting layer, A bank layer having a lower opening that defines the light-emitting region of each of the sub-pixels, A light-shielding layer on the bank layer defines an upper opening that superimposes on each of the lower openings, A display device comprising a color filter on the light-shielding layer, which includes a first color filter, a second color filter, and a third color filter.

2. The second subpixel includes a second-first subpixel and a second-second subpixel that emit light of the same color to each other. The display device according to claim 1, wherein the light reflected from the second-first sub-pixel has a phase difference from the light reflected from the second-second sub-pixel.

3. The third subpixel includes a third-first subpixel and a third-second subpixel that emit light of the same color to each other. The display device according to claim 2, wherein the light reflected from the third-first sub-pixel has a phase difference from the light reflected from the third-second sub-pixel.

4. The display device according to claim 1, wherein the light reflected from the first-1 sub-pixel and the light reflected from the first-2 sub-pixel have the same wavelength under vacuum conditions.

5. The display device according to claim 1, wherein the light reflected from the first-1 sub-pixel and the light reflected from the first-2 sub-pixel have a phase difference greater than 0 and less than 2π.

6. The display device according to claim 1, wherein the vertical distance from the substrate to the sub-pixel electrode of the first-1 sub-pixel is different from the vertical distance from the substrate to the sub-pixel electrode of the first-2 sub-pixel.

7. The display device according to claim 2, wherein the vertical distance from the substrate to the sub-pixel electrode of the second-first sub-pixel is different from the vertical distance from the substrate to the sub-pixel electrode of the second-second sub-pixel.

8. The display device according to claim 3, wherein the vertical distance from the substrate to the sub-pixel electrode of the third-first sub-pixel is different from the vertical distance from the substrate to the sub-pixel electrode of the third-second sub-pixel.

9. The first-1 subpixel and the first-2 subpixel are adjacent to each other. The 2-1 subpixel and the 2-2 subpixel are adjacent to each other. The display device according to claim 3, wherein the third-first sub-pixel and the third-second sub-pixel are adjacent to each other.

10. The aforementioned display device is The bank layer includes a phase difference pattern layer, which includes a pattern portion corresponding to each of the sub-pixels. The pattern portion includes a first-first color pattern portion corresponding to the first-first color subpixel and a first-second color pattern portion corresponding to the first-second color subpixel, The display device according to claim 1, wherein the first- and second color pattern portions differ from the first- and first color pattern portions in at least one of the refractive index and thickness.

11. The display device according to claim 10, wherein the first-1 color pattern section and the first-2 color pattern section each contain materials with different refractive indices.

12. The first-1 color pattern section and the first-2 color pattern section contain the same substance, The display device according to claim 10, wherein the thickness of the first-1 color pattern portion is different from the thickness of the first-2 color pattern portion.

13. The first-1 color pattern section and the first-2 color pattern section each contain materials with different refractive indices. The display device according to claim 10, wherein the thickness of the first-1 color pattern portion is different from the thickness of the first-2 color pattern portion.

14. The second subpixel includes a second-first subpixel and a second-second subpixel that emit light of the same color to each other. The light reflected from the second-first subpixel has a phase difference from the light reflected from the second-second subpixel. The pattern portion further includes a second-first color pattern portion corresponding to the second-first color subpixel and a second-second color pattern portion corresponding to the second-second color subpixel, The display device according to claim 10, wherein the second-second color pattern portion differs from the second-first color pattern portion in at least one of its refractive index and thickness.

15. The third subpixel includes a third-first subpixel and a third-second subpixel that emit light of the same color to each other. The light reflected from the third-first subpixel has a phase difference from the light reflected from the third-second subpixel. The pattern portion further includes a third-first color pattern portion corresponding to the third-first sub-pixel and a third-second color pattern portion corresponding to the third-second sub-pixel, The display device according to claim 10, wherein the third-second color pattern portion differs from the third-first color pattern portion in at least one of its refractive index and thickness.

16. The display device according to claim 10, wherein each pattern portion has a width greater than the width of the corresponding subpixel among the subpixels.

17. The display device according to claim 10, wherein the pattern portion includes an organic insulating material or an inorganic insulating material.

18. The display device comprises the sub-pixel and the sealing layer on the bank layer, The present invention further includes a touch sensor layer on the sealing layer, The display device according to claim 10, wherein the phase difference pattern layer is located between the sealing layer and the touch sensor layer.

19. The display device further includes a cover window on the color filter, The display device according to claim 10, wherein the phase difference pattern layer is located between the sub-pixel and the cover window.

20. circuit board and A first-color subpixel includes a first-1 subpixel and a first-2 subpixel that emit light of the same color from each other, Second color subpixel and, It comprises a third sub-pixel and Each of these sub-pixels includes a sub-pixel electrode, a light-emitting layer on the sub-pixel electrode, and a counter electrode on the light-emitting layer, A bank layer having a lower opening that defines the light-emitting region of each of the sub-pixels, A light-shielding layer on the bank layer defines an upper opening that superimposes on each of the lower openings, A color filter on the light-shielding layer comprising a first color filter, a second color filter, and a third color filter, The bank layer includes a phase difference pattern layer, which includes a pattern portion corresponding to each of the subpixels, The pattern portion includes a first-first color pattern portion corresponding to the first-first color subpixel and a first-second color pattern portion corresponding to the first-second color subpixel, A display device wherein the first- and second color pattern sections differ from the first- and first color pattern sections in at least one of their refractive index and thickness.

Images