Display device

Abstract

A display device having improved aperture ratio and color reproduction is provided. The display device includes a pixel including a first sub-pixel displaying a first color, a second sub-pixel displaying a second color, and a third sub-pixel displaying a third color, the pixel including a first light exit area belonging to the first sub-pixel, a second light exit area belonging to the second sub-pixel, a third light exit area belonging to the third sub-pixel, and a light blocking area disposed at a periphery of each light exit area, the first light exit area being a square shape, and the second light exit area and the third light exit area being rectangular shapes.

Description

Technical Field

[0001] This disclosure relates to a display device, and more specifically, to an organic light-emitting display device including a wavelength conversion layer. Background Technology

[0002] With the development of multimedia, the importance of display devices has gradually increased. In response, various display devices such as Liquid Crystal Display Devices (LCDs) and Organic Light Emitting Diode Display Devices (OLEDs) have been developed.

[0003] In a display device, a self-emissive display device includes a self-emissive element, such as an organic light-emitting element. The self-emissive element may include two opposing electrodes and a light-emitting layer sandwiched between them. When the self-emissive element is an organic light-emitting element, electrons and holes supplied from the two electrodes can recombine in the light-emitting layer to generate excitons, and the generated excitons transition from an excited state to a ground state and emit light.

[0004] Because this self-emissive display device does not require a separate light source, it can not only be configured to be low-power and thin, but also attracts much attention as a next-generation display device due to its high-quality characteristics such as wide viewing angle, high brightness, high contrast and fast response speed. Summary of the Invention

[0005] As the resolution of a display device increases, the pixel size decreases accordingly, which limits the minimum width of the light-blocking area to prevent color mixing. In high-resolution displays, a reduction in aperture ratio can potentially decrease not only luminance efficiency but also color reproduction efficiency.

[0006] The problem to be solved by this disclosure is to provide a display device with both a high aperture ratio and a high color reproduction rate.

[0007] The subject matter of this disclosure is not limited to the subject matter mentioned above, and other technical subject matters not mentioned can be clearly understood by those skilled in the art from the following description.

[0008] A display device according to one embodiment for solving the above-mentioned problems includes a pixel, the pixel including: a first sub-pixel displaying a first color; a second sub-pixel displaying a second color; and a third sub-pixel displaying a third color, the pixel including: a first light-emitting region belonging to the first sub-pixel; a second light-emitting region belonging to the second sub-pixel; a third light-emitting region belonging to the third sub-pixel; and a light-shielding region disposed around each of the light-emitting regions, the first light-emitting region being square in shape, and the second and third light-emitting regions being rectangular in shape.

[0009] It is possible that either the second light-emitting region or the third light-emitting region is a rectangular shape with a vertical side length of 1, and the other is a rectangular shape with a horizontal side length of 1.

[0010] It could be that the first color is red, the second color is green, and the third color is blue.

[0011] It is possible that the area of ​​the first light-emitting region is larger than the area of ​​the second light-emitting region, and the area of ​​the second light-emitting region is larger than the area of ​​the third light-emitting region.

[0012] It is permissible that the minimum width of the light-shielding area is 24 μm or more.

[0013] It is possible that the ratio of the area occupied by the first light-emitting region, the second light-emitting region, and the third light-emitting region to the area of ​​the pixel is 50% or more.

[0014] Alternatively, the pixel may be square in shape.

[0015] Alternatively, the horizontal edge of the pixel may be parallel to the horizontal edge of each light-emitting region, and the vertical edge of the pixel may be parallel to the vertical edge of each light-emitting region.

[0016] Alternatively, the pixel may further include: a first light-emitting region, belonging to the first sub-pixel and overlapping with the first light-emitting region; a second light-emitting region, belonging to the second sub-pixel and overlapping with the second light-emitting region; and a third light-emitting region, belonging to the third sub-pixel and overlapping with the third light-emitting region.

[0017] Alternatively, each side of the first light-emitting region may be positioned inside the first light-emitting region, each side of the second light-emitting region may be positioned inside the second light-emitting region, and each side of the third light-emitting region may overlap with each side of the third light-emitting region.

[0018] A display device according to another embodiment for solving the above-mentioned problems is a display device including pixels, wherein the pixels include: a first sub-pixel displaying a first color; a second sub-pixel displaying a second color; and a third sub-pixel displaying a third color. The display device includes a first display substrate and a second display substrate opposite to the first display substrate. The first display substrate includes: a first substrate; sub-pixel electrodes disposed on the first substrate and disposed for each sub-pixel; a pixel defining film disposed on the first substrate along the boundary of the sub-pixel and exposing the sub-pixel electrodes; and a light-emitting layer disposed on the first substrate through the pixel defining film. The second display substrate includes: a second substrate; a color control layer disposed on the second substrate and provided for each sub-pixel; and a light-shielding member disposed on the second substrate and arranged along the boundary of the sub-pixel. The light-shielding member defines a light-emitting area and a light-shielding area of ​​the second display substrate. The light-emitting area includes: a first light-emitting area belonging to the first sub-pixel; a second light-emitting area belonging to the second sub-pixel; and a third light-emitting area belonging to the third sub-pixel. The first light-emitting area is square in shape.

[0019] It is possible that either the second light-emitting region or the third light-emitting region is a rectangular shape with a vertical side length of 1, and the other is a rectangular shape with a horizontal side length of 1.

[0020] It could be that the first color is red, the second color is green, and the third color is blue.

[0021] The color control layer may include: a first wavelength conversion pattern belonging to the first sub-pixel and converting the third color light into the first color light; a second wavelength conversion pattern belonging to the second sub-pixel and converting the third color light into the second color light; and a light-transmitting layer belonging to the third sub-pixel and transmitting the third color light.

[0022] It is possible that the area of ​​the first light-emitting region is larger than the area of ​​the second light-emitting region, and the area of ​​the second light-emitting region is larger than the area of ​​the third light-emitting region.

[0023] It can be that the minimum width of the light-blocking area is 24μm or more, and the ratio of the area occupied by the first light-emitting area, the second light-emitting area, and the third light-emitting area to the area of ​​the pixel is 50% or more.

[0024] Alternatively, the display device may further include: a red color filter layer disposed between the second substrate and the first wavelength conversion pattern; a green color filter layer disposed between the second substrate and the second wavelength conversion pattern; and a blue color filter layer disposed between the second substrate and the light-transmitting layer.

[0025] The pixel definition film may define the light-emitting and non-light-emitting areas of the first display substrate. The light-emitting area includes: a first light-emitting area, which belongs to the first sub-pixel and overlaps with the first light-emitting area; a second light-emitting area, which belongs to the second sub-pixel and overlaps with the second light-emitting area; and a third light-emitting area, which belongs to the third sub-pixel and overlaps with the third light-emitting area.

[0026] Alternatively, each side of the first light-emitting region may be positioned inside the first light-emitting region, each side of the second light-emitting region may be positioned inside the second light-emitting region, and each side of the third light-emitting region may overlap with each side of the third light-emitting region.

[0027] Alternatively, the display device may further include a filler layer that bonds the first display substrate and the second display substrate between them.

[0028] Specific details of other embodiments are included in the detailed description and accompanying drawings.

[0029] Invention Effects

[0030] The display device according to one embodiment can have a high aperture ratio while exhibiting a high color reproduction rate.

[0031] The effects of the embodiments are not limited to those illustrated above, and many more effects are included in this specification. Attached Figure Description

[0032] Figure 1 This is a perspective view of a display device according to one embodiment.

[0033] Figure 2 It is along Figure 1 A rough cross-sectional view taken from line II-II'.

[0034] Figure 3 This is a schematic configuration diagram showing the pixel arrangement of a display device according to one embodiment.

[0035] Figure 4 This is a cross-sectional view of a display device according to an embodiment.

[0036] Figure 5 It is used for explanation Figure 4 A schematic cross-sectional view of the light propagation path of the display device.

[0037] Figure 6 as well as Figure 7 This is a configuration diagram showing the arrangement of sub-pixel openings according to various embodiments.

[0038] Figure 8 It is a graph showing the movement of color coordinates with different relative aperture ratios of display devices according to various embodiments.

[0039] Figure 9 This is a configuration diagram of the light-emitting regions of a pixel in a display device according to an embodiment.

[0040] Figure 10 This is a configuration diagram of the light-emitting regions of a pixel in a display device according to another embodiment.

[0041] Figure 11 as well as Figure 12 This is a configuration diagram of the light-emitting regions of a pixel in a display device according to some embodiments.

[0042] Figure 13 This is a cross-sectional view of a display device according to another embodiment.

[0043] Figure 14 This is a cross-sectional view of a display device according to yet another embodiment.

[0044] Figure 15 This is a cross-sectional view of a display device according to yet another embodiment.

[0045] Figure 16 This is a cross-sectional view of a display device according to yet another embodiment.

[0046] Explanation of reference numerals in the attached figures

[0047] 1: Display device

[0048] 10: First display substrate

[0049] 20: Second display substrate

[0050] 50: Sealing component

[0051] 70: Fill layer Detailed Implementation

[0052] The advantages, features, and methods for implementing this disclosure are described in reference to the appended document. Figure 1 The details of the embodiments described below will make this clear. However, this disclosure is not limited to the embodiments disclosed below and may be implemented in different forms. This disclosure is provided only to make the disclosure complete and to enable those skilled in the art to fully understand the scope of this disclosure, which will be defined by the scope of the claims.

[0053] Describing elements or layers as "on" other elements or layers includes both cases where they are directly located on other elements and cases where other layers or elements are sandwiched in between. Throughout this specification, the same reference numerals refer to the same constituent elements.

[0054] Although terms like "first," "second," etc., are used to describe various constituent elements, these constituent elements are certainly not limited to these terms. These terms are only used to distinguish one constituent element from another. Therefore, the first constituent element mentioned below can certainly also be a second constituent element within the technical concept of this disclosure.

[0055] The following describes specific embodiments with reference to the accompanying drawings.

[0056] Figure 1 This is a perspective view of a display device according to one embodiment.

[0057] Reference Figure 1 Display device 1 can refer to any electronic device that provides a display screen. For example, televisions, laptops, monitors, billboards, mobile phones, smartphones, tablet PCs (Personal Computers), electronic watches, smartwatches, smartwatch phones, mobile communication terminals, electronic notebooks, e-readers, PMPs (Portable Multimedia Players), navigators, game consoles, digital cameras, and Internet of Things devices that provide display screens can be included in display device 1.

[0058] The display device 1 illustrated in the attached figure is a television set. Although the display device 1 is not limited to this, it can have high resolution to ultra-high resolution such as HD, UHD, 4K, 8K, etc.

[0059] The display device 1 can be formed into a rectangular shape on a plane. The planar shape of the display device 1 is not limited to the example shown, and may also be circular or other shapes.

[0060] Display device 1 may include a display area DA for displaying images and a non-display area NDA for not displaying images. The display area DA may include multiple pixels PX. The non-display area NDA may be located around the display area DA and may surround the display area DA.

[0061] Figure 2 It is along Figure 1 A rough cross-sectional view taken from line II-II'.

[0062] Reference Figure 2The display device 1 may include a first display substrate 10 and a second display substrate 20 opposite to the first display substrate 10. The display device 1 may also include a sealing member 50 that bonds the first display substrate 10 and the second display substrate 20, and a filler layer 70 that fills the space between the first display substrate 10 and the second display substrate 20.

[0063] The first display substrate 10 may include elements and circuitry for displaying images. For example, it may include pixel circuitry such as switching elements, a pixel definition film (PDL) defining the light-emitting region (EMA) and the non-light-emitting region (NEM) (described later) in the display area DA, and a self-light emitting element. In an exemplary embodiment, the self-light emitting element may include at least one of an organic light-emitting diode (OLED), a quantum dot light-emitting diode (QD), an inorganic-based micro-LED (e.g., a micro LED), or an inorganic-based nano-LED (e.g., a nano LED). Hereinafter, the case where the self-light emitting element is an organic light-emitting element will be described as an example.

[0064] The second display substrate 20 may be located above and opposite the first display substrate 10. The second display substrate 20 may include a color control structure that converts the color of the incident light.

[0065] In the non-display area NDA, the sealing member 50 may be located between the first display substrate 10 and the second display substrate 20. The sealing member 50 may be disposed along the edges of the first display substrate 10 and the second display substrate 20 in the non-display area NDA, and may surround the display area DA in a top view. The first display substrate 10 and the second display substrate 20 may be bonded to each other via the sealing member 50. The sealing member 50 may include an organic material. The sealing member 50 may be made of an epoxy resin, but is not limited thereto.

[0066] A filling layer 70 may be disposed in the space between the first display substrate 10 and the second display substrate 20, which are surrounded by the sealing member 50. The filling layer 70 may fill the space between the first display substrate 10 and the second display substrate 20. The filling layer 70 may be made of a material capable of transmitting light. The filling layer 70 may include an organic material. For example, the filling layer 70 may be made of a Si-based organic material, an epoxy-based organic material, etc., but is not limited thereto. The filling layer 70 may also be omitted.

[0067] Figure 3 This is a schematic configuration diagram showing the pixel arrangement of a display device according to one embodiment. Hereinafter, they may refer to: Figure 3 The first direction DR1 refers to the transverse direction, and the second direction DR2 refers to the longitudinal direction.

[0068] Reference Figure 3 The display area DA of the display device includes multiple pixels PX. A pixel PX refers to the smallest repeating unit used for display. To display full color, each pixel PX can include multiple sub-pixels PXS that emit different colors from each other. For example, each pixel PX can include a first sub-pixel PXS_1 responsible for emitting red light, a second sub-pixel PXS_2 responsible for emitting green light, and a third sub-pixel PXS_3 responsible for emitting blue light. One first sub-pixel PXS_1, one second sub-pixel PXS_2, and one third sub-pixel PXS_3 can be assigned to each pixel PX.

[0069] Each sub-pixel PXS may include a light-emitting region TA and its surrounding light-shielding region BA. The light-shielding region BA of one sub-pixel PXS is adjacent to the light-shielding region BA of the adjacent sub-pixel PXS (regardless of whether they are sub-pixels within the same pixel PX). The light-shielding regions BA of adjacent sub-pixels PXS can be connected into one. Furthermore, the light-shielding regions BA of all sub-pixels PXS can be connected into one, but this is not a limitation. The light-emitting region TA of adjacent sub-pixels PXS can be divided by the light-shielding region BA. The light-emitting region TA and the light-shielding region BA will be explained in more detail later.

[0070] Conceptually, this can be interpreted as adjacent sub-pixels PXS being in a connected state. Even in this case, since the boundary between sub-pixels PXS lies on a single, interconnected light-shielding area BA, it cannot be physically divided. The boundary between sub-pixels PXS can be located at the midpoint of the space separating the light-emitting areas TA of adjacent sub-pixels PXS (or, the midpoint of the width direction of the light-shielding area BA). The overall shape of a sub-pixel PXS can have a similar shape relationship to the shape of the light-emitting area TA of the corresponding sub-pixel PXS, but is not limited to this.

[0071] The shape of the light-emitting area TA of each sub-pixel PXS within each pixel PX can be different. For example, the light-emitting area TA of the first sub-pixel PXS_1 (hereinafter, the first light-emitting area TA1) can be a substantially square shape, the light-emitting area TA of the second sub-pixel PXS_2 (hereinafter, the second light-emitting area TA2) can be a substantially rectangular shape with a vertical side length of 1, and the light-emitting area TA of the third sub-pixel PXS_3 (hereinafter, the third light-emitting area TA3) can be a substantially rectangular shape with a horizontal side length of 1. In this specification, "rectangle" or "substantial rectangle" can include not only a complete rectangle whose opposite sides are composed of parallel line segments, but also shapes that can be considered as approximately rectangular. For example, even if there are curves or convexities in at least a portion of each side, as long as the line segments connecting the extending directions as a whole form a rectangular shape, it is interpreted as being included in a substantial rectangle. In addition, even if the extending directions of the opposite sides are not completely parallel, if they are considered to be approximately parallel when viewed with the naked eye because their intersection angle is 15° or less or 5° or less, it can be interpreted as forming a rectangular shape. Furthermore, in this specification, "square" or "substantial square" can include not only cases where a substantial rectangle has four sides of equal length, but also cases where the lengths of the four sides deviate slightly but are perceived to be approximately similar to the naked eye. For example, a substantial square can be referred to as such if the deviation between its horizontal and vertical lengths is within 10%, 5%, or 1%.

[0072] The shape and configuration of each light-emitting region (TA) within pixel PX will be described in detail later.

[0073] The size of a pixel (PX) can vary depending on the size (area) and resolution of the display device. The length of the horizontal side (the side extending in the first direction DR1) and the vertical side (the side extending in the second direction DR2) of a pixel (PX) can be selected from 50μm to 10000μm or from 150μm to 250μm. In the case of a 65-inch display device with 8K resolution, the length of the horizontal and vertical sides of a pixel (PX) can be from 180μm to 190μm or approximately 186μm, but is not limited to these dimensions.

[0074] Each pixel PX, comprising multiple sub-pixels PXS, can be arranged alternately along the matrix direction. The shape and arrangement of the sub-pixels PXS within each pixel PX can be the same, but are not limited to this. The overall shape of each pixel PX, comprising multiple sub-pixels PXS, can be a substantially square shape. However, it is not limited to this; the shape of each pixel PX can be varied into rhombuses, rectangles, etc.

[0075] Figure 4 This is a cross-sectional view of a display device according to an embodiment.

[0076] Reference Figure 4 The first display substrate 10 includes a first substrate 110 and a plurality of light-emitting elements disposed on the first substrate 110.

[0077] In the accompanying drawings, if the cross-sectional structure of the first display substrate 10 is described sequentially from top to bottom, the first substrate 110 may be an insulating substrate. The first substrate 110 may include a transparent material. For example, the first substrate 110 may include a transparent insulating material such as glass or quartz. The first substrate 110 may be a rigid substrate. However, the first substrate 110 is not limited to the examples above; the first substrate 110 may also include plastics such as polyimide, and may also have flexible properties such as being bendable, flexible, foldable, or rollable.

[0078] Multiple sub-pixel electrodes PXSEs can be disposed on one side of the first substrate 110. Each sub-pixel electrode PXSE can be configured for each sub-pixel PXS. The sub-pixel electrodes PXSEs of adjacent sub-pixels PXS can be separated from each other. A circuit layer (not shown) for driving each sub-pixel electrode PXSE can be disposed between the first substrate 110 and the sub-pixel electrodes PXSEs. The circuit layer may include multiple thin-film transistors and capacitors, etc.

[0079] The sub-pixel electrode (PXSE) can be the first electrode of a light-emitting element (or light-emitting diode), for example, it can be the anode electrode. The PXSE can have a stacked film structure consisting of a high work function material layer (Indium-Tin-Oxide: ITO), Indium-Zinc-Oxide: IZO, Zinc Oxide: ZnO, Induim Oxide: In2O3) and a reflective material layer such as silver (Ag), magnesium (Mg), aluminum (Al), platinum (Pt), lead (Pd), gold (Au), nickel (Ni), neodymium (Nd), iridium (Ir), chromium (Cr), lithium (Li), calcium (Ca), or mixtures thereof. The high work function material layer can be positioned above the reflective material layer, thus being positioned close to the light-emitting layer (EML). The sub-pixel electrode PXSE can have a multilayer structure of ITO / Mg, ITO / MgF, ITO / Ag, or ITO / Ag / ITO, but is not limited to this.

[0080] A pixel definition film (PDL) may be disposed on one side of the first substrate 110 along the boundary of the sub-pixel PXS. The PDL may be disposed on the sub-pixel electrode PXSE and includes an opening exposing the sub-pixel electrode PXSE. The non-emitting region NEM and the emitting region EMA can be separated by the PDL and its opening. The PDL may include organic insulating materials such as acrylic resin, epoxy resin, phenolic resin, polyamide resin, polyimide resin, unsaturated polyester resin, polyphenylene ether resin, polyphenylene sulfide resin, or benzocyclobutene (BCB). The PDL may also include inorganic materials.

[0081] Spacer components (SPCs) can be disposed on a portion of the pixel definition film (PDL). The SPCs can be positioned directly above the PDL. The SPCs can overlap the PDL in the thickness direction. The SPCs serve to maintain a gap between the PDL and any structures disposed above it. For example, when depositing organic layers through a fine metal mask, the SPCs can prevent the fine metal mask from sagging. Depending on the situation, the SPCs can also support the structures stacked above them and can mitigate deformation caused by stress when the display device is pressurized.

[0082] In a top view, spacer SPCs can be circular, octagonal, hexagonal, or other polygonal shapes. The diameter (or width) of the spacer SPC can be less than or equal to the width of the pixel definition film (PDL). Spacer SPCs can be configured only on a portion of the PDL, thereby creating a step with the portion without spacer SPCs.

[0083] The spacer SPC can be constructed by including the same organic insulating material as the pixel definition film (PDL). The spacer SPC can be composed of a separate layer different from the pixel definition film (PDL), but it can also be integrally constructed from the same material using a single process. For example, after coating with a photosensitive organic material, the pixel definition film (PDL) and the spacer SPC can be formed in a single process using exposure and development with a slit mask or halftone mask, resulting in a single layer.

[0084] An emissive layer (EML) is disposed on the sub-pixel electrode (PXSE) exposed by the pixel definition film (PDL). In one embodiment where the display device is an organic light-emitting display device, the emissive layer (EML) may include an organic layer containing organic matter. The organic layer may include an organic emissive layer (EML), and depending on the situation, may further include a hole injection / transport layer and / or an electron injection / transport layer as an auxiliary layer for auxiliary light emission. In another embodiment, when the display device is a micro-LED display device, a nano-LED display device, etc., the emissive layer (EML) may include an inorganic material such as an inorganic semiconductor.

[0085] In some embodiments, the emissive layer EML may have a tandem structure comprising a plurality of organic emissive layers EMLs arranged overlapping in the thickness direction and a charge generation layer disposed therebetween. The overlapping organic emissive layers EMLs may emit light of the same wavelength or different wavelengths. At least a portion of the emissive layers EML of each sub-pixel PXS may be separated from the same layers of adjacent sub-pixels PXS.

[0086] In one embodiment, the wavelength of light emitted by each emissive layer (EML) can be the same in each sub-pixel (PXS). For example, the emissive layer (EML) of each sub-pixel (PXS) emits blue light or ultraviolet light, and the color control structure includes a wavelength conversion layer (WCL), thus enabling the display of the color of each sub-pixel (PXS).

[0087] In another embodiment, the wavelength of light emitted by each emissive layer EML can also be different for each color pixel PX. For example, the emissive layer EML of the first sub-pixel PXS_1 can emit light of a first color, the emissive layer EML of the second sub-pixel PXS_2 can emit light of a second color, and the emissive layer EML of the third sub-pixel PXS_3 can emit light of a third color.

[0088] A common electrode CME can be configured on the emissive layer EML. The common electrode CME can be connected not only to the emissive layer EML, but also to the top of the pixel definition layer PDL.

[0089] The common electrode CME can be connected without distinguishing individual sub-pixels (PXS). The common electrode CME can be a full-surface electrode configured across the entire surface without distinguishing sub-pixels (PXS). The common electrode CME can be the second electrode of a light-emitting diode (LED), for example, it can be the cathode electrode.

[0090] The common electrode CME may include a layer of material with a low work function, such as Li, Ca, LiF / Ca, LiF / Al, Al, Mg, Ag, Pt, Pd, Ni, Au, Nd, Ir, Cr, BaF, Ba, or compounds or mixtures thereof (e.g., mixtures of Ag and Mg). The common electrode CME may also include a transparent metal oxide layer disposed on the material layer with the low work function.

[0091] The sub-pixel electrode PXSE, the emissive layer EML, and the common electrode CME can constitute a light-emitting element (e.g., an organic light-emitting element). Light emitted from the emissive layer EML can be emitted upwards and laterally through the common electrode CME.

[0092] A thin-film encapsulation structure 120 may be disposed above the common electrode CME. The thin-film encapsulation structure 120 may include at least one thin-film encapsulation layer. For example, the thin-film encapsulation layer may include a first inorganic film 121, an organic film 122, and a second inorganic film 123. The first inorganic film 121 and the second inorganic film 123 may respectively include silicon nitride, silicon oxide, or silicon oxynitride, etc. The organic film 122 may include organic insulating materials such as polyacrylate resin, epoxy resin, phenolic resin, polyamide resin, polyimide resin, unsaturated polyester resin, polyphenylenether resin, polyphenylenesulfide resin, or benzocyclobutene (BCB).

[0093] The second display substrate 20 can be disposed above and opposite the thin-film encapsulation structure 120. In the accompanying drawings, if the cross-sectional structure of the second display substrate 20 is described sequentially downwards, the second substrate 210 of the second display substrate 20 may include a transparent material. The second substrate 210 may include a transparent insulating material such as glass or quartz. The second substrate 210 may be a rigid substrate. However, the second substrate 210 is not limited to the examples described above; the second substrate 210 may also include plastics such as polyimide, and may also have flexible properties such as bendability, flexibility, foldability, or rollability.

[0094] The second substrate 210 may be the same substrate as the first substrate 110, but it may differ in material, thickness, transmittance, etc. For example, the second substrate 210 may have a higher transmittance than the first substrate 110. The second substrate 210 may be either thicker or thinner than the first substrate 110.

[0095] A top light-absorbing member UAB can be disposed along the boundary of the sub-pixel PXS on one side of the second substrate 210 facing the first substrate 110. The top light-absorbing member UAB can overlap with the pixel definition film PDL of the first display substrate 10 and is located in the non-light-emitting region NEM. The top light-absorbing member UAB may include an opening exposing the side of the second substrate 210 that overlaps with the light-emitting region EMA. The top light-absorbing member UAB not only blocks light emitted from the display device, but also suppresses external light reflection. In a top view, the top light-absorbing member UAB can be formed in a grid shape.

[0096] The upper light-absorbing component UAB may be composed of organic materials. In one embodiment, the upper light-absorbing component UAB may include a light-absorbing material that absorbs visible light. For example, the upper light-absorbing component UAB may be composed of a material used as a black matrix in a display device. The upper light-absorbing component UAB may also be a type of light-shielding component.

[0097] In another embodiment, the upper light-absorbing component UAB may also absorb light of a specific wavelength range in the visible light spectrum and transmit light of another specific wavelength range. For example, the upper light-absorbing component UAB may comprise the same material as a color filter layer CFL. Specifically, the upper light-absorbing component UAB may be composed of the same material as the blue third color filter layer (refer to 'CFL_3'). In some embodiments, the upper light-absorbing component UAB may also be integrally formed with the third color filter layer CFL_3. The upper light-absorbing component UAB may also be omitted.

[0098] A color filter layer CFL can be disposed on one side of the second substrate 210 where the upper light-absorbing member UAB is located. The color filter layer CFL can block light emitted that is not the corresponding color of each sub-pixel PXS. The color filter layer CFL can be disposed on one side of the second substrate 210 exposed through the opening of the upper light-absorbing member UAB. Furthermore, a portion of the color filter layer CFL can also be disposed on the adjacent upper light-absorbing member UAB.

[0099] The color filter layer (CFL) may include a first color filter layer CFL_1 disposed on the first sub-pixel PXS_1, a second color filter layer CFL_2 disposed on the second sub-pixel PXS_2, and a third color filter layer CFL_3 disposed on the third sub-pixel PXS_3. Each color filter layer CFL may include a colorant such as a dye or pigment that absorbs wavelengths other than the corresponding color wavelength. The first color filter layer CFL_1 may be a red color filter layer, the second color filter layer CFL_2 may be a green color filter layer, and the third color filter layer CFL_3 may be a blue color filter layer. Although the accompanying drawings illustrate that adjacent color filter layers CFL are arranged apart from each other on the upper light-absorbing component UAB, adjacent color filter layers CFL may also partially overlap each other on the upper light-absorbing component UAB.

[0100] A first cover layer CPL1 may be disposed on the color filter layer CFL. The first cover layer CPL1 can prevent impurities such as moisture or air from penetrating from the outside and causing damage or contamination to the color filter layer CFL. In addition, the first cover layer CPL1 can prevent the pigment of the color filter layer CFL from diffusing to other components.

[0101] The first cover layer CPL1 can be attached to one side of the color filter layer CFL (on) Figure 2 The first capping layer CPL1 is directly connected to the bottom layer. The first capping layer CPL1 can be made of inorganic materials. For example, the first capping layer CPL1 can be made of silicon nitride, aluminum nitride, zirconium nitride, titanium nitride, hafnium nitride, tantalum nitride, silicon oxide, aluminum oxide, titanium oxide, tin oxide, and silicon oxynitride, etc.

[0102] A color control layer (WCL) and a light transmittance layer (TPL) may be disposed on the first overlay layer (CPL1). The color control layers WCL and TPL may include a wavelength conversion layer (WCL) that converts the wavelength of incident light and / or a light transmittance layer (TPL) that maintains the wavelength of incident light and allows it to pass through. The wavelength conversion layer (WCL) or the light transmittance layer (TPL) may be configured to be separate for each sub-pixel (PXS). The wavelength conversion layer (WCL) or the light transmittance layer (TPL) may overlap in the thickness direction relative to the light-emitting region (EMA) and the light-emitting region (TA). Adjacent wavelength conversion layers (WCL) or light transmittance layers (TPL) may be spaced apart from each other. The spaced space may substantially overlap with the light-shielding region (BA). In a top view, the spaced space forms a valley with a grid shape.

[0103] A wavelength conversion layer (WCL) can be configured on a sub-pixel PXS where the wavelength of light incident from the emissive layer (EML) differs from the color of the corresponding sub-pixel PXS and thus requires wavelength conversion. A light-transmitting layer (TPL) can be configured on a sub-pixel PXS where the wavelength of light incident from the EML is the same as the color of the corresponding sub-pixel PXS. An exemplary embodiment is the case where the emissive layer (EML) of each sub-pixel PXS emits a third color, corresponding to an example where the wavelength conversion layer (WCL) is configured on the first sub-pixel PXS_1 and the second sub-pixel PXS_2, and the light-transmitting layer (TPL) is configured on the third sub-pixel PXS_3. As another example, when the emissive layer (EML) of each sub-pixel PXS emits light of a wavelength different from the color of each sub-pixel PXS, such as ultraviolet light, only the wavelength conversion layer (WCL) needs to be configured, without the light-transmitting layer (TPL). As another example, when the emissive layer EML of each sub-pixel PXS emits light corresponding to the color of each sub-pixel PXS, only the transmissive layer TPL can be configured without the wavelength conversion layer WCL, or the transmissive layer TPL can be omitted in all sub-pixel PXS.

[0104] In the illustrated embodiment, the wavelength conversion layer WCL may include a first wavelength conversion pattern WCL1 disposed on the first sub-pixel PXS_1 and a second wavelength conversion pattern WCL2 disposed on the second sub-pixel PXS_2.

[0105] The first wavelength conversion pattern WCL1 may include a first substrate resin BRS1 and a first wavelength conversion material WCP1 disposed within the first substrate resin BRS1. The second wavelength conversion pattern WCL2 may include a second substrate resin BRS2 and a second wavelength conversion material WCP2 disposed within the second substrate resin BRS2. The light-transmitting layer TPL may include a third substrate resin BRS3 and a scatterer SCP disposed therein.

[0106] The first substrate resin BRS1, the second substrate resin BRS2, ​​and the third substrate resin BRS3 may include light-transmitting organic materials. For example, the first substrate resin BRS1, the second substrate resin BRS2, ​​and the third substrate resin BRS3 may be composed of epoxy resins, acrylic resins, calomel resins, or imide resins, etc. The first substrate resin BRS1, the second substrate resin BRS2, ​​and the third substrate resin BRS3 may be composed of the same substance, but are not limited to this.

[0107] The scattering material (SCP) can be a metal oxide particle or an organic particle. Examples of metal oxides include titanium oxide (TiO2), zirconium oxide (ZrO2), aluminum oxide (Al2O3), indium oxide (In2O3), zinc oxide (ZnO), or tin oxide (SnO2). Examples of organic particle materials include acrylic resins or polyurethane resins.

[0108] The first wavelength conversion material WCP1 can be a material that converts blue light into red light, and the second wavelength conversion material WCP2 can be a material that converts blue light into green light. Both the first wavelength conversion material WCP1 and the second wavelength conversion material WCP2 can be quantum dots, quantum rods, phosphors, etc. The quantum dots can include group IV nanocrystals, group II-VI compound nanocrystals, group III-V compound nanocrystals, group IV-VI nanocrystals, or combinations thereof. The first wavelength conversion pattern WCL1 and the second wavelength conversion pattern WCL2 can also include a scatterer SCP to improve wavelength conversion efficiency.

[0109] For blue light incident from the emissive layer EML, the transmissive layer TPL located in the third sub-pixel PXS_3 allows it to pass through while maintaining its wavelength. The scatterer SCP of the transmissive layer TPL can scatter the light and adjust the exit angle of the light emitted through the transmissive layer TPL. The transmissive layer TPL may not include wavelength conversion material.

[0110] A second capping layer CPL2 is disposed on the wavelength conversion layer WCL and the light-transmitting layer TPL. The second capping layer CPL2 may be composed of an inorganic material. The second capping layer CPL2 may include a material selected from the list of materials that serve as the first capping layer CPL1. The second capping layer CPL2 and the first capping layer CPL1 may be composed of the same material, but are not limited thereto.

[0111] The second cover layer CPL2 can cover each wavelength conversion pattern WCL1, WCL2 and the light-transmitting layer TPL. The second cover layer CPL2 can cover not only one side of each wavelength conversion pattern WCL1, WCL2 and the light-transmitting layer TPL, but also the side surface. In the space between adjacent color control layers WCL and TPL, the second cover layer CPL2 can contact the first cover layer CPL1. The second cover layer CPL2 can have a conformal shape relative to the surface steps formed by the color control layers WCL and TPL. The valley portion of the space between the color control layers WCL and TPL can have a predetermined depth without being completely filled by the second cover layer CPL2.

[0112] A color mixing prevention component (MBM) is disposed on the second cover layer CPL2. The MBM is made of a material capable of blocking light transmission, thereby preventing light from entering adjacent sub-pixels (PXS) and causing color mixing. The MBM can be disposed along the boundary of the sub-pixel PXS. For example, the MBM can be disposed along the space between the color control layers WCL and TPL. The MBM can fill the valley portion of the space between the color control layers WCL and TPL. One side of the MBM is not limited to this and can protrude in the thickness direction relative to the side of the color control layers WCL and TPL. The height (or thickness) of the MBM protruding from the surrounding wavelength conversion patterns WCL1, WCL2 or the light-transmitting layer TPL can be 1 μm to 3 μm, 1.4 μm to 1.8 μm, or approximately 1.6 μm, but is not limited to these dimensions.

[0113] The color mixing prevention component (MBM) may include organic materials. The MBM may include light-absorbing materials that absorb visible light. In one embodiment, the MBM may include an organic light-shielding material. As a type of light-shielding component, the MBM may be composed of the same material as the aforementioned light-absorbing component (UAB), but is not limited thereto.

[0114] The color mixing prevention component (MBM) can define a light-shielding area (BA) and a light-emitting area (TA). The area where the color mixing prevention component (MBM) is configured is called the light-shielding area (BA). The color control layers (WCL) and (TPL) that are not covered by the color mixing prevention component (MBM) or expose the color mixing prevention component (MBM) can be called the light-emitting area (TA).

[0115] A filler layer 70 may be disposed between the first display substrate 10 and the second display substrate 20. The filler layer 70 serves to fill the space between the first display substrate 10 and the second display substrate 20 while bonding them together. The filler layer 70 may be disposed between the thin-film encapsulation structure 120 of the first display substrate 10 and the second cover layer CPL2 of the second display substrate 20. The filler layer 70 may be composed of Si-based organic materials, epoxy-based organic materials, etc., but is not limited to these.

[0116] Figure 5 It is used for explanation Figure 4 A schematic cross-sectional view of the light propagation path of the display device.

[0117] Reference Figure 5The light emitted from the emissive layer (EML) of each sub-pixel PXS generally faces the color control layers (WCL) and TPL above. In the first sub-pixel PXS_1, blue light emitted from the EML is converted into red light by the first wavelength conversion material (WCP1) of the first wavelength conversion layer (WCL1) and emitted upwards. In the second sub-pixel PXS_2, blue light emitted from the EML is converted into green light by the second wavelength conversion material (WCP2) of the second wavelength conversion layer (WCL2) and emitted upwards. In the third sub-pixel PXS_3, blue light emitted from the EML passes through the transmissive layer (TPL) without wavelength conversion.

[0118] In the color control layers WCL and TPL, light can collide with and scatter wavelength conversion materials WCP1 and WCP2 and / or scatterers SCP. A portion of the scattered light can propagate toward the adjacent sub-pixel PXS side; however, this intrusion can be blocked by the color mixing prevention component MBM configured between the sub-pixels PXS.

[0119] On one hand, the light emitted from the emissive layer EML of the luminescent region EMA has a predetermined pointing angle, thus it can propagate not only vertically but also in an outwardly inclined direction. Since the emissive layer EML and the color control layers WCL and TPL are spaced apart, light emitted from the emissive layer EML of a specific sub-pixel PXS can propagate towards the color control layers WCL and TPL of adjacent sub-pixels PXS, depending on the situation. The color mixing prevention component MBM can block light from propagating towards the color control layers WCL and TPL of adjacent sub-pixels PXS, as described above. When the color mixing prevention component MBM protrudes more than the color control layers WCL and TPL, it can more effectively perform the photomasking function.

[0120] The color mixing prevention component (MBM) can prevent light mixing between sub-pixels (PXS) to some extent. However, if the amount of light emitted from the emissive layer (EML) and absorbed by the MBM increases, the display efficiency of the display device will decrease. If the EML ineffectively emits too much light, it will not only increase power consumption but may also accelerate the degradation of the EML. Therefore, it is preferable to design the area of ​​the emitting region (EMA) (meaning the area in a top view) considering the direction angle of the light emitted from the EML. For example, if the area of ​​the emitting region (EMA) is larger than the area of ​​the corresponding emitting region (TA), not only light propagating in the outward-sloping direction but also a portion of the vertically propagating light will be absorbed by the MBM, which may be detrimental in terms of light efficiency.

[0121] In this respect, the area of ​​the emitting region EMA can be less than or equal to the area of ​​the corresponding emitting region TA. Alternatively, in a top view, the edges of the emitting region EMA may overlap with the edges of the emitting region TA (when the areas are the same) or be positioned inside the emitting region TA (when the area of ​​the emitting region TA is larger). However, this is not a limitation; due to alignment errors or other reasons, a portion of the edges of the emitting region TA may be positioned inside the edges of the corresponding emitting region EMA.

[0122] When the light-emitting region EMA has a smaller area than the light-emitting region TA, and they are arranged in an overlapping configuration, the spacing between the edges of the light-emitting region EMA and the corresponding edges of the light-emitting region TA can be uniform along the periphery, but is not limited to this.

[0123] For each sub-pixel PXS, the spacing between the edges of the emitting region EMA and the edges of its corresponding emitting region TA can also be different. For example, in the first sub-pixel PXS_1 and the second sub-pixel PXS_2, the area of ​​the emitting region TA is larger than the area of ​​the emitting region EMA and the spacing between the edges in the top view is the same. On the other hand, in the third sub-pixel PXS_3, the area of ​​the emitting region TA and the area of ​​the emitting region EMA are the same, so that the edges overlap.

[0124] The aforementioned light-emitting region EMA and light-emitting region TA are respectively related to the aperture ratio of the display device. The aperture ratio of the display device depends on how much light is transmitted across the overall area in a top view. The light-emitting region EMA is the area where the light-emitting layer EML defined by the pixel definition film PDL is disposed and corresponds to the opening of the first display substrate 10. The aperture ratio of the first display substrate 10 can be calculated by the ratio of the area occupied by the light-emitting region EMA to the overall area of ​​the display area of ​​the first display substrate 10. The light-emitting region TA is the area where the color control layers WCL and TPL defined by the color mixing prevention component MBM are disposed and corresponds to the opening of the second display substrate 20. The aperture ratio of the second display substrate 20 can be calculated by the ratio of the area occupied by the light-emitting region TA to the overall area of ​​the display area of ​​the second display substrate 20. In one embodiment, the aperture ratio of the second display substrate 20 is not limited to this, but can be 50% or more. There is no upper limit to the aperture ratio of the second display substrate 20, but for example, it can be 70%, 60%, or 55%. The opening of an individual sub-pixel PXS may include both an overlapping light-emitting region EMA and a light-emitting region TA. When the display surface emitting light is taken as a reference, the opening of the sub-pixel PXS can be defined as the light-emitting region TA.

[0125] The shape and configuration of the openings of sub-pixels PXS within a single pixel PX can affect the brightness, luminous efficiency, and even color reproduction rate of a display device. (See reference...) Figure 6 as well as Figure 7 A detailed explanation is provided.

[0126] Figure 6 as well as Figure 7 This is a configuration diagram illustrating the arrangement of sub-pixel openings according to various embodiments. Figure 6 as well as Figure 7 In this embodiment, each pixel PX with a horizontal and vertical length of L is configured with three openings (i.e., light-emitting regions TA) of sub-pixels PXS. As described above, in this embodiment, the openings of sub-pixels PXS are used with the same concept as the light-emitting regions TA of sub-pixels PXS.

[0127] Figure 6 The three sub-pixel PXS light-emitting regions TA are shown to be arranged in a strip-like pattern with rectangular shapes. Figure 6 The three sub-pixels PXS light-emitting areas TA are all rectangles with the same shape and area, with the same vertical side length. Figure 7 This illustrates a case where the shapes of the light-emitting regions (TA) of the three sub-pixels (PXS) are different, representing a so-called s-strip arrangement. Figure 7 In the example, the first light-emitting region TA1 is square, the second light-emitting region TA2 is a rectangle with a vertical side longer than its horizontal side, and the third light-emitting region TA3 is a rectangle with a horizontal side longer than its vertical side. In the illustrated embodiment, each side of the light-emitting region TA of the sub-pixel PXS is substantially parallel to the horizontal or vertical side of the pixel PX.

[0128] exist Figure 6 as well as Figure 7 In the arrangement, the light-emitting area TA of each sub-pixel PXS is surrounded by a light-shielding area BA. Adjacent sub-pixel PXS light-emitting areas TA are separated by the width of the light-shielding area BA. The width of the light-shielding area BA is related to the design margin of the light-emitting area TA and the prevention of color mixing between adjacent sub-pixels PXS. A larger width of the light-shielding area BA may be beneficial for preventing color mixing. For each interval, when the width of the light-shielding area BA is different, the color mixing problem may depend on the minimum width of the light-shielding area BA. For ease of explanation, Figure 6 as well as Figure 7 This example illustrates the case where the width of the shading area BA is uniform along its extension direction.

[0129] On the one hand, in pixel PX, the light-emitting region TA reduces the degree of light-blocking region BA, thereby reducing the aperture ratio. The larger the area of ​​the light-blocking region BA, the more disadvantageous it may be in terms of brightness. Therefore, it is preferable to minimize the area of ​​the light-blocking region BA to prevent brightness reduction within a range that has an appropriate width of the light-blocking region BA in order to prevent color mixing, and to maximize the area of ​​the light-emitting region TA of sub-pixel PXS.

[0130] When the maximum width of the light-blocking area BA used to prevent color mixing is 2d, in order to maximize the area of ​​the sub-pixel PXS opening, the spacing in the first direction DR1 and the spacing in the second direction DR2 between adjacent sub-pixel PXS openings can both be set to 2d. This 2d spacing can be maintained not only between the light-emitting areas TA of sub-pixel PXS disposed within a single pixel PX, but also between the light-emitting areas TA of adjacent sub-pixel PXS belonging to different pixels PXs. Therefore, the spacing between the edge of the light-emitting area TA of a sub-pixel PXS adjacent to the boundary of pixel PX and the boundary of pixel PX can be set to d.

[0131] When comparing Figure 6 as well as Figure 7 When considering the area of ​​the light-blocking region BA, the light-blocking region BA of the pixel PX border and the light-blocking region BA that spans along the first direction DR1 inside the pixel PX are interconnected (refer to S1, S2), and their areas are the same. In the remaining parts S31 and S32, Figure 6 S31 has an area of ​​{(L-2d)*2d}, on the other hand, Figure 7 S32 has an area of ​​{x*2d}. Here, x, as the length of one side of the first sub-pixel PXS_1 light-emitting region TA, has a value that is smaller than (L-2d) by (y+2d). Here, y, as the length of the vertical side of the third light-emitting region TA3, has a positive value. Figure 7 S32 has less than Figure 6 The value of S31, therefore, Figure 7 The area of ​​the light-blocking region BA within the pixel PX is smaller than Figure 6 The area of ​​the light-blocking region BA within the pixel PX. Therefore, compared to the strip-type pixel PX arrangement, the s-strip-type pixel PX arrangement can ensure a higher aperture ratio.

[0132] on the one hand, Figure 7 The s-strip arrangement is advantageous in terms of brightness compared to the strip arrangement. However, it has certain limitations in terms of freely adjusting the area of ​​the PXS aperture of each sub-pixel.

[0133] For example, Figure 6 The strip arrangement can either form the light-emitting regions TA of the three sub-pixels PXS to be of the same area or to be of different areas. Even when they are formed to be of different areas, it is possible to freely design whether the light-emitting region TA of a sub-pixel PXS at a certain position is larger.

[0134] On the other hand, in the case of the coexistence of square light-emitting region TA1 and rectangular light-emitting regions TA2 and TA3 Figure 7In the S-strip arrangement, it is difficult to make the areas of the light-emitting regions TA of each sub-pixel PXS identical. The square-shaped first light-emitting region TA1 has an area larger than the rectangular third light-emitting region TA3 with a longer horizontal side. The rectangular second light-emitting region TA2 with a longer vertical side can also be formed larger than the square-shaped first light-emitting region TA1; however, in this case, the sizes of the remaining light-emitting regions TA1 and TA3 will be significantly reduced. In the above case, for example, the size of the vertical second light-emitting region TA2 can be more than twice the size of the horizontal third light-emitting region TA3. To adjust the area deviation between the openings of the sub-pixels PXS within a pixel PX to be less large, it is preferable to form the square-shaped first light-emitting region TA1 to its maximum size.

[0135] The area of ​​the opening of each sub-pixel PXS and the area of ​​its corresponding light-emitting region EMA are related not only to the brightness and efficiency of the corresponding sub-pixel PXS, but also to the color reproduction rate.

[0136] Figure 8 It is a graph showing the movement of color coordinates with different relative aperture ratios of display devices according to various embodiments. Figure 8 The relative aperture ratio is calculated as the ratio of the aperture ratio of the corresponding embodiment to the aperture ratio of the control group (the ratio of the area occupied by the light-emitting regions TA of the three sub-pixel PXS to the area of ​​the pixel PX). The relative aperture ratio of each embodiment is adjusted by increasing the width of the light-shielding region BA relative to the control group. This makes the rate of change of the relative aperture ratio of the pixel PX approximately the same as the rate of change of the relative area of ​​the light-emitting region TA of each sub-pixel PXS. For example, if the aperture ratio of the pixel PX is 85.7% relative to the control group, the area of ​​the light-emitting region TA of each sub-pixel PXS can also be reduced to approximately 85.7% relative to the control group. Each sub-pixel PXS is a strip with a rectangular shape, and the area of ​​each light-emitting region EMA decreases proportionally with the decrease in aperture ratio.

[0137] Reference Figure 8 The change in color coordinates was measured based on the decrease in aperture ratio. In the example with an aperture ratio of 72.6% relative to the control group, the green (G) color coordinate changed by approximately 1.4%, and the blue (B) color coordinate changed by approximately 2.5%. On the other hand, the red (R) color coordinate changed by approximately 8.8%, thus exhibiting a significantly higher color coordinate shift rate relative to other colors. Analysis suggests that this means that as the area of ​​the light-emitting region (TA) of the red sub-pixel PXS decreases and the area of ​​the corresponding light-emitting region (EMA) decreases, the color coordinates change rapidly.

[0138] Assuming that the sides of the emitting region EMA within the emitting region TA are spaced apart from the sides of the emitting region TA, the area of ​​the emitting region EMA within a square-shaped emitting region TA is larger than the area of ​​the emitting region EMA within a rectangular emitting region TA of the same area. That is, even if the openings of the square-shaped sub-pixel PXS and the rectangular-shaped sub-pixel PXS are reduced at the same area ratio, the area reduction rate of the emitting region EMA located within the square shape is smaller. Therefore, if a red sub-pixel PXS, which has a high color coordinate shift rate due to area reduction, is placed within the square sub-pixel PXS emitting region TA with a small area reduction rate, the color reproduction rate can be easily controlled.

[0139] The following will describe the sub-pixel PXS arrangement of a display device according to an embodiment, taking into account the aperture ratio and color reproduction rate described above.

[0140] Figure 9 This is a configuration diagram of the light-emitting regions of a pixel in a display device according to an embodiment.

[0141] Each side of the light-emitting area TA of pixel PX and sub-pixel PXS can extend approximately in either the first direction DR1 or the second direction DR2. In each quadrilateral, the side extending in the first direction DR1 and located relatively above in the top view is called the first horizontal side, and the side opposite the first horizontal side and located relatively below in the top view is called the second horizontal side. Additionally, the side extending in the second direction DR2 and located relatively to the left in the top view is called the first vertical side, and the side opposite the first vertical side and located relatively to the right in the top view is called the second vertical side.

[0142] The first light-emitting area TA1 of the first sub-pixel PXS_1 can be substantially square. The second light-emitting area TA2 of the second sub-pixel PXS_2 can be substantially rectangular with a vertical side longer than its horizontal side. The third light-emitting area TA3 of the third sub-pixel PXS_3 can be substantially rectangular with a horizontal side longer than its vertical side. The vertical side of the second light-emitting area TA2 can be longer than the horizontal and vertical sides of the first light-emitting area TA1 and the horizontal side of the third light-emitting area TA3. The horizontal side of the third light-emitting area TA3 can have the same length as the horizontal side of the first light-emitting area TA1. The area of ​​the third light-emitting area TA3 can be smaller than the area of ​​the first light-emitting area TA1 and the area of ​​the second light-emitting area TA2. Furthermore, the area of ​​the first light-emitting area TA1 can be larger than the area of ​​the second light-emitting area TA2.

[0143] The first light-emitting region TA1 can be configured on the lower right side of pixel PX. The second horizontal edge of the first light-emitting region TA1 is opposite to the second horizontal edge of pixel PX. The second vertical edge of the first light-emitting region TA1 is opposite to the second vertical edge of pixel PX.

[0144] The second light-emitting region TA2 can be configured to the left of pixel PX. The first vertical edge of the second light-emitting region TA2 is opposite to the first vertical edge of pixel PX. The second horizontal edge of the second light-emitting region TA2 is opposite to the second horizontal edge of pixel PX. The first horizontal edge of the second light-emitting region TA2 is opposite to the first horizontal edge of pixel PX.

[0145] The third light-emitting region TA3 can be configured on the upper right side of pixel PX. The first horizontal edge of the third light-emitting region TA3 is opposite to the first horizontal edge of pixel PX. The second vertical edge of the third light-emitting region TA3 is opposite to the second vertical edge of pixel PX.

[0146] Furthermore, the first horizontal edge of the first light-emitting region TA1 is opposite to the second horizontal edge of the third light-emitting region TA3. The second vertical edge of the second light-emitting region TA2 is opposite to the first vertical edge of the first light-emitting region TA1 and the first vertical edge of the third light-emitting region TA3.

[0147] In the aforementioned opposing relationship between the edges of the light-emitting region TA or the edges of the pixel PX, no other light-emitting regions TA may be configured between the opposing edges, and a light-shielding region BA may be configured between the opposing edges. As mentioned above, the width of the light-shielding region BA is related to the design margin of the light-emitting region TA, the prevention of color mixing between adjacent sub-pixels PXS, etc. Considering the aforementioned parameters, the minimum width of the light-shielding region BA may be 22 μm or more, preferably 24 μm or more, and more preferably 26 μm or more. There is no upper limit to the minimum width of the light-shielding region BA, but, for example, it may be 28 μm or less. Preferably, the upper limit of the minimum width of the light-shielding region BA is adjusted based on maintaining the aperture ratio of the second display substrate 20 at 50% or more.

[0148] In some embodiments, a spacer SPC may be configured within the light-shielding region BA. The spacer SPC may be configured within the light-shielding region BA and not overlap with the light-emitting region TA. In one embodiment, one spacer SPC may be configured for each pixel PX. For example, one spacer SPC may be configured on the first vertical edge of a pixel PX, and another spacer SPC may be configured on the second vertical edge of a pixel PX. A spacer SPC may be configured across two adjacent pixels PX. The diameter of the spacer SPC may be greater than the minimum width of the light-shielding region BA.

[0149] The width of the light-shielding area BA in the area where the spacer SPC is configured can be greater than the minimum width of the light-shielding area BA. As the width of the light-shielding area BA is increased by the spacer SPC, the edge of the light-emitting area TA of the adjacent sub-pixel PXS can change its shape while its area decreases accordingly. In one embodiment, the spacer SPC can be configured adjacent to the vertical edge of the pixel PX. Specifically, the first vertical edge of the second light-emitting area TA2 can be configured adjacent to the spacer SPC located on the left side of the pixel PX, and the second vertical edge of the first light-emitting area TA1 can be configured adjacent to the spacer SPC located on the right side of the pixel PX. The first vertical edge of the second light-emitting area TA2 can include a recessed portion that is recessed inward (on the side of the first direction DR1) and meanders along the contour of the adjacent spacer SPC. In addition, in the case of the second vertical edge of the first light-emitting area TA1, it can also include a recessed portion that is recessed inward (on the other side of the first direction DR1) and meanders along the contour of the adjacent spacer SPC.

[0150] The emitting region EMA can have a similar shape to the emitting region TA in a top view and can be arranged to overlap within each emitting region TA.

[0151] The light-emitting region EMA (hereinafter, the first light-emitting region EMA1) of the first sub-pixel PXS_1 is disposed inside the first light-emitting region TA1. The spacing between each side of the first light-emitting region EMA1 and each side of the first light-emitting region TA1 can be from 4 μm to 12 μm. In one embodiment, the spacing between each side of the first light-emitting region EMA1 and each side of the first light-emitting region TA1 can be about 8 μm. In other words, the length of the horizontal and vertical sides of the first light-emitting region TA1 can be about 16 μm compared to the length of the corresponding horizontal and vertical sides of the first light-emitting region EMA1.

[0152] The light-emitting region EMA (hereinafter, the second light-emitting region EMA2) of the second sub-pixel PXS_2 is disposed inside the second light-emitting region TA2. The spacing between the edges of the second light-emitting region EMA2 and the edges of the second light-emitting region TA2 can be from 4 μm to 12 μm, and in one embodiment, it can be about 8 μm. The spacing between the edges of the light-emitting region EMA and the edges of the light-emitting region TA can be the same in the first sub-pixel PXS_1 and the second sub-pixel PXS_2.

[0153] The light-emitting area EMA (hereinafter, the third light-emitting area EMA3) of the third sub-pixel PXS_3 can have the same size as the third light-emitting area TA3. The edges of the third light-emitting area EMA3 and the edges of the third light-emitting area TA3 can overlap. However, this is not a limitation; in the case of the third sub-pixel PXS_3, the spacing between the edges of the light-emitting area EMA3 and the edges of the light-emitting area TA3 can also be the same as that of the first sub-pixel PXS_1 or the second sub-pixel PXS_2.

[0154] Figure 9 The pixel PX arrangement, through an s-strip arrangement having a light-emitting area TA in the shape of a square, not only improves the aperture ratio, but also makes it easy to control the color reproduction rate by configuring the first sub-pixel PXS_1, which displays red and is sensitive to color reproduction rate, in the largest square-shaped light-emitting area TA.

[0155] Figure 10 This is a configuration diagram of the light-emitting regions of a pixel in a display device according to another embodiment.

[0156] Reference Figure 10 The display device according to this embodiment has an S-strip arrangement, and the first light-emitting region TA1 is disposed on the lower right side of pixel PX and has a square shape. Figure 9 The implementation is the same. However, Figure 10 Implementation examples and Figure 9 The difference between the embodiments is that, and Figure 9 When comparing the embodiments, the configurations of the second light-emitting region TA2 and the third light-emitting region TA3 are reversed.

[0157] Specifically, the second light-emitting region TA2 is positioned above pixel PX, and the third light-emitting region TA3 is positioned below the left side of pixel PX. The second light-emitting region TA2 is a rectangle with a horizontal side longer than its vertical side, and the third light-emitting region TA3 is a rectangle with a vertical side longer than its horizontal side. The horizontal side of the second light-emitting region TA2 can be longer than the horizontal and vertical sides of the first light-emitting region TA1 and the vertical side of the second light-emitting region TA2. The vertical side of the third light-emitting region TA3 can have a substantially the same length as the vertical side of the first light-emitting region TA1. The area of ​​the third light-emitting region TA3 can be smaller than the area of ​​the first light-emitting region TA1 and the area of ​​the second light-emitting region TA2, while the area of ​​the first light-emitting region TA1 can be larger than the area of ​​the second light-emitting region TA2.

[0158] The second horizontal and second vertical edges of the first light-emitting region TA1 are respectively opposite to the second horizontal and second vertical edges of the pixel PX. The first horizontal edge of the first light-emitting region TA1 is opposite to the second horizontal edge of the second light-emitting region TA2, and the first vertical edge is opposite to the second vertical edge of the third light-emitting region TA3.

[0159] The first horizontal edge, first vertical edge, and second vertical edge of the second light-emitting region TA2 are respectively opposite to the first horizontal edge, first vertical edge, and second vertical edge of pixel PX. The second horizontal edge of the second light-emitting region TA2 is opposite to the first horizontal edge of the first light-emitting region TA1 and the first horizontal edge of the third light-emitting region TA3.

[0160] The first vertical edge and the second horizontal edge of the third light-emitting region TA3 are respectively opposite to the first vertical edge and the second horizontal edge of the pixel PX. The first horizontal edge of the third light-emitting region TA3 is opposite to the second horizontal edge of the second light-emitting region TA2, and the second vertical edge of the third light-emitting region TA3 is opposite to the first vertical edge of the first light-emitting region TA1.

[0161] The spacer SPC can be disposed on the vertical edge of the pixel PX. Consequently, the second vertical edge of the first light-emitting region TA1 and the first vertical edge of the third light-emitting region TA3 disposed adjacent to the spacer SPC can include recesses that are recessed inward and meander along the contour of the spacer SPC.

[0162] Figure 10 The arrangement of pixels (PX) and Figure 9 Similarly, the pixel PX arrangement can improve the aperture ratio by having an s-strip arrangement with a light-emitting area TA that includes a square shape. By configuring the first sub-pixel PXS_1 in the largest square-shaped light-emitting area TA, the color reproduction rate can be easily controlled.

[0163] Figure 11 as well as Figure 12 This is a configuration diagram of the light-emitting regions of a pixel in a display device according to some embodiments. Specifically, Figure 11 An example is shown where the light-emitting region TA has a rectangular shape with horizontal strip-shaped pixel PX arrangement where the horizontal side is longer than the vertical side. Figure 12 An example of a vertical strip-shaped pixel PX arrangement with a rectangular shape where the vertical side of the light-emitting region TA is longer than the horizontal side is shown.

[0164] Measurement Figure 11 as well as Figure 12 The strip-shaped pixel PX arrangement and Figure 9 as well as Figure 10 The aperture ratio of the s-strip pixel PX arrangement is shown in Table 1 and Table 2 below.

[0165] Table 1

[0166]

[0167] Table 2

[0168]

[0169] Table 1, representing the aperture ratio of the first display substrate 10, shows the ratio (%) of the area occupied by the light-emitting region EMA to the total area of ​​the pixel PX. Table 2, representing the aperture ratio of the second display substrate 20, shows the ratio (%) of the area occupied by the light-emitting region TA to the total area of ​​the pixel PX. Furthermore, Tables 1 and 2 respectively show that s-strip A is... Figure 9The pixel PX arrangement, s-strip B is Figure 10 The pixel PX arrangement has horizontal stripes. Figure 11 The pixel PX arrangement has vertical stripes. Figure 12 The pixel PX arrangement.

[0170] Referring to Tables 1 and 2, based on the same aperture ratio, the s-strip arrangement ensures a wider minimum width of the shading area BA compared to the strip arrangement. Therefore, the s-strip arrangement is superior in preventing color mixing, and when the minimum width is the same, it has a superior aperture ratio.

[0171] Furthermore, when comparing s-strip arrangements with strip arrangements, the first emitting region EMA1 is wider than the first emitting region TA1 of the same area. Therefore, the above... Figure 9 as well as Figure 10 The s-strip arrangement can exhibit high color reproduction efficiency by reducing the area reduction rate of the first luminous region EMA1 of the red subpixel PXS, which is sensitive to color reproduction efficiency.

[0172] The following describes another embodiment. In the following embodiments, descriptions of configurations identical to those in the previously described embodiments will be omitted or simplified, and the differences will be mainly explained.

[0173] Figure 13 This is a cross-sectional view of a display device according to another embodiment.

[0174] Reference Figure 13 ,and Figure 4 The difference in the embodiments is that the first display substrate 10 of the display device according to this embodiment further includes a lower light-absorbing component BAB.

[0175] Specifically, the lower light-absorbing component BAB of the first display substrate 10 can be disposed on the thin-film encapsulation structure 120. The lower light-absorbing component BAB can be configured to overlap with the pixel definition film PDL. The lower light-absorbing component BAB can act as a barrier to prevent light emitted from the light-emitting layer EML from mixing into the light-emitting region TA of adjacent sub-pixels PXS. In this embodiment, the lower light-absorbing component BAB can further block color mixing of each sub-pixel PXS.

[0176] The lower light-absorbing component BAB may be composed of organic materials. In one embodiment, the lower light-absorbing component BAB may include a light-absorbing material that absorbs visible light. For example, the lower light-absorbing component BAB may be composed of a material used as a black matrix in a display device. The lower light-absorbing component BAB may be a type of light-shielding component. The lower light-absorbing component BAB may overlap with the upper light-absorbing component UAB in the thickness direction.

[0177] The width of the lower light-absorbing component BAB can be either less than or greater than the width of the pixel definition film PDL. The lower light-absorbing component BAB of the first display substrate 10 can define the light-emitting region EMA together with the pixel definition film PDL. For example, the lower light-absorbing component BAB can have a width less than or equal to the width of the lower pixel definition film PDL, and when they completely overlap within the pixel definition film PDL, the light-emitting region EMA can be defined by the pixel definition film PDL. If the width of the lower light-absorbing component BAB is greater than the pixel definition film PDL, and the lower light-absorbing component BAB protrudes outward from the pixel definition film PDL in a top view, the boundary of the light-emitting region EMA can be defined by the protruding lower light-absorbing component BAB. In this case, the aperture ratio of the first display substrate 10 can reduce the increase in width of the lower light-absorbing component BAB.

[0178] Figure 14 This is a cross-sectional view of a display device according to yet another embodiment.

[0179] Reference Figure 14 The display device according to this embodiment and Figure 4 The difference in the embodiment is that the color mixing prevention component MBM of the second display substrate 20 is used as a partition wall for forming the color control layers WCL and TPL.

[0180] That is, the color control layers WCL and TPL are formed in the space surrounded by the color mixing prevention component MBM. The color control layers WCL and TPL can be formed by inkjet printing or other methods.

[0181] In this embodiment, the second overlay layer CPL2 covers the color control layer WCL, TPL, and even the color mixing prevention component MBM.

[0182] Although not shown in the accompanying drawings, a third cover layer may also be disposed between the color control layer WCL, TPL and the color mixing prevention component MBM. In this case, the third cover layer may be disposed along the entire surface of the second display substrate 20, directly contacting the first cover layer CPL1 in the light-emitting region TA, and directly contacting the second cover layer CPL2 on one side of the color mixing prevention component MBM.

[0183] Figure 15 This is a cross-sectional view of a display device according to yet another embodiment.

[0184] Figure 15 The embodiment illustrates that the color control layer WCL, TPL and the color mixing prevention component MBM described above can be formed sequentially on the first substrate 110.

[0185] Specifically, a lower light-absorbing component BAB is disposed on the thin-film encapsulation structure 120. A first cover layer CPL1 is disposed on the lower light-absorbing component BAB. A color control layer WCL and a color control layer TPL are disposed on the first cover layer CPL1 for each sub-pixel PXS, and a second cover layer CPL2 is disposed on the color control layers WCL and TPL. A color mixing prevention component MBM is disposed on the second cover layer CPL2 in the valley between adjacent color control layers WCL and TPL. A color filter layer CFL and an upper light-absorbing component UAB can be sequentially disposed on the second cover layer CPL2 and the color mixing prevention component MBM for each sub-pixel PXS.

[0186] Furthermore, a filling layer 70 may be disposed above the color filter layer CFL and the light-absorbing component UAB above it, and a second substrate 210 may be disposed above the filling layer 70.

[0187] In this embodiment, the light-emitting region EMA can be defined by the pixel defining film PDL and / or the lower light-absorbing component BAB. Furthermore, since the lower light-absorbing component BAB is also disposed adjacent to the color-mixing prevention component MBM, similarly to the light-emitting region EMA, the light-emitting region TA can be defined not only by the color-mixing prevention component MBM and / or the upper light-absorbing component UAB, but also by the lower light-absorbing component BAB.

[0188] Figure 16 This is a cross-sectional view of a display device according to yet another embodiment.

[0189] Figure 16 Implementation examples and Figure 15 The difference in the embodiment is that the color mixing prevention component MBM serves as a partition wall for forming the color control layers WCL and TPL. That is, the color control layers WCL and TPL are formed in the space surrounded by the color mixing prevention component MBM. The color control layers WCL and TPL can be formed by inkjet printing or the like.

[0190] In this embodiment, the second overlay layer CPL2 covers the color control layer WCL, TPL, and even the color mixing prevention component MBM.

[0191] Although not shown in the accompanying drawings, a third cover layer may also be disposed between the color control layer WCL, TPL and the color mixing prevention component MBM. In this case, the third cover layer may be disposed along the entire surface of the second display substrate 20, directly contacting the first cover layer CPL1 in the light-emitting region TA, and directly contacting the second cover layer CPL2 on one side of the color mixing prevention component MBM.

[0192] The embodiments of this disclosure have been described above with reference to the accompanying drawings. However, those skilled in the art to which this disclosure pertains will understand that it can be implemented in other specific ways without altering the technical concept or essential features of this disclosure. Therefore, it should be understood that the embodiments described above are exemplary in all respects and not limiting.

Claims

1. A display device, wherein, The display device includes pixels, each pixel comprising: a first sub-pixel displaying a first color; a second sub-pixel displaying a second color; and a third sub-pixel displaying a third color. The pixels include: The first light-emitting region belongs to the first sub-pixel; The second light-emitting area belongs to the second sub-pixel; The third light-emitting region belongs to the third sub-pixel; and The light-shielding area is configured around each of the light-emitting areas. The first light-emitting area is square in shape. The second and third light-emitting regions are rectangular in shape. The first color is red, the second color and the third color are either green or blue. The area of ​​the first light-emitting region is larger than the area of ​​the second light-emitting region and the area of ​​the third light-emitting region. In the light-shielding area, spacers that do not overlap with the first light-emitting area, the second light-emitting area, and the third light-emitting area are respectively arranged on the first and second vertical sides of the pixel, and the width of the light-shielding area in the area where the spacers are arranged is greater than the minimum width of the light-shielding area. The first vertical edge of the second light-emitting region is disposed adjacent to the spacer located to the left of the pixel. The second longitudinal edge of the first light-emitting region is disposed adjacent to the spacer located to the right of the pixel. The first longitudinal edge of the second light-emitting region includes a recessed portion that curves inward along the contour of the adjacent spacer on one side of the first direction. The second longitudinal edge of the first light-emitting region includes a recessed portion that curves along the contour of the adjacent spacer on the inward side of the first direction.

2. The display device according to claim 1, wherein, The second light-emitting region is a rectangle with the first vertical side recessed inward, and the third light-emitting region is a rectangle with the horizontal side extended.

3. The display device according to claim 2, wherein, The second color is green. The third color is blue.

4. The display device according to claim 3, wherein, The area of ​​the second light-emitting region is larger than the area of ​​the third light-emitting region.

5. The display device according to claim 4, wherein, The minimum width of the light-shielding area is 24 μm or more.

6. The display device according to claim 5, wherein, The area occupied by the first light-emitting region, the second light-emitting region, and the third light-emitting region is more than 50% of the area of ​​the pixel.

7. The display device according to claim 2, wherein, The pixels are square in shape.

8. The display device according to claim 7, wherein, The horizontal edge of the pixel is parallel to the horizontal edge of each light-emitting region. The vertical edge of the pixel is parallel to the vertical edge of each light-emitting region.

9. The display device according to claim 2, wherein, The pixels also include: The first light-emitting region belongs to the first sub-pixel and overlaps with the first light-emitting region; The second light-emitting region belongs to the second sub-pixel and overlaps with the second light-emitting region; and The third light-emitting region belongs to the third sub-pixel and overlaps with the third light-emitting region.

10. The display device according to claim 9, wherein, Each side of the first light-emitting region is positioned inside the first light-emitting area. Each side of the second light-emitting region is positioned inside the second light-emitting region. Each side of the third light-emitting region overlaps with each side of the third light-emitting region.

11. A display device, wherein, The display device includes pixels, each pixel comprising: a first sub-pixel displaying a first color; a second sub-pixel displaying a second color; and a third sub-pixel displaying a third color. The display device includes a first display substrate and a second display substrate opposite to the first display substrate. The first display substrate includes: First substrate; Sub-pixel electrodes are disposed on the first substrate and are provided for each sub-pixel; A pixel definition film is disposed on the first substrate along the boundary of the sub-pixel and exposes the sub-pixel electrode; A light-emitting layer is disposed on each of the sub-pixel electrodes exposed through the pixel definition film; A common electrode is disposed on the light-emitting layer. The second display substrate includes: Second substrate; A color control layer is disposed on the second substrate and configured for each of the sub-pixels; and A light-shielding component is disposed on the second substrate and arranged along the boundary of the sub-pixel. The light-shielding component defines the light-emitting area and the light-shielding area of ​​the second display substrate. The light-emitting region includes: a first light-emitting region belonging to the first sub-pixel; a second light-emitting region belonging to the second sub-pixel; and a third light-emitting region belonging to the third sub-pixel. The first light-emitting area is square, while the second and third light-emitting areas are rectangular. The first color is red, the second color and the third color are either green or blue. The area of ​​the first light-emitting region is larger than the area of ​​the second light-emitting region and the area of ​​the third light-emitting region. In the light-shielding area, spacers that do not overlap with the first light-emitting area, the second light-emitting area, and the third light-emitting area are respectively arranged on the first and second vertical sides of the pixel, and the width of the light-shielding area in the area where the spacers are arranged is greater than the minimum width of the light-shielding area. The first vertical edge of the second light-emitting region is disposed adjacent to the spacer located to the left of the pixel. The second longitudinal edge of the first light-emitting region is disposed adjacent to the spacer located to the right of the pixel. The first longitudinal edge of the second light-emitting region includes a recessed portion that curves inward along the contour of the adjacent spacer on one side of the first direction. The second longitudinal edge of the first light-emitting region includes a recessed portion that curves along the contour of the adjacent spacer on the inward side of the first direction.

12. The display device according to claim 11, wherein, The second light-emitting region is a rectangle with the first vertical side recessed inward, and the third light-emitting region is a rectangle with the horizontal side extended.

13. The display device according to claim 12, wherein, The second color is green. The third color is blue.

14. The display device according to claim 13, wherein, The color control layer includes: The first wavelength conversion pattern belongs to the first sub-pixel and converts the third color light into the first color light; A second wavelength conversion pattern, belonging to the second sub-pixel, converts the third color light into the second color light; and The light-transmitting layer belongs to the third sub-pixel and transmits the third color light.

15. The display device according to claim 14, wherein, The area of ​​the second light-emitting region is larger than the area of ​​the third light-emitting region.

16. The display device according to claim 15, wherein, The minimum width of the light-shielding area is 24 μm or more. The area occupied by the first light-emitting region, the second light-emitting region, and the third light-emitting region is more than 50% of the area of ​​the pixel.

17. The display device according to claim 14, wherein, The display device further includes: A red color filter layer is disposed between the second substrate and the first wavelength conversion pattern; A green filter layer is disposed between the second substrate and the second wavelength conversion pattern; and A blue filter layer is disposed between the second substrate and the light-transmitting layer.

18. The display device according to claim 12, wherein, The pixel definition film defines the light-emitting and non-light-emitting areas of the first display substrate. The luminescent region includes: The first light-emitting region belongs to the first sub-pixel and overlaps with the first light-emitting region; The second light-emitting region belongs to the second sub-pixel and overlaps with the second light-emitting region; and The third light-emitting region belongs to the third sub-pixel and overlaps with the third light-emitting region.

19. The display device according to claim 18, wherein, Each side of the first light-emitting region is positioned inside the first light-emitting area. Each side of the second light-emitting region is positioned inside the second light-emitting region. Each side of the third light-emitting region overlaps with each side of the third light-emitting region.

20. The display device according to claim 11, wherein, The display device further includes: A filler layer is used to bond the first display substrate and the second display substrate between them.

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