Display panel

Abstract

The display panel includes: a light-emitting element for emitting source light, and including a first electrode, a light-emitting layer arranged on the first electrode, and a second electrode arranged on the light-emitting layer and outputting the source light; a pixel defining layer including an opening exposing at least a portion of the first electrode; an optical conversion pattern arranged on the pixel defining layer; a reflective pattern arranged on the light-emitting element and having an inclined surface; and a first light-shielding pattern spaced apart from the optical conversion pattern when viewed in a plan view.

Description

Technical Field

[0001] Exemplary embodiments of the present invention generally relate to a display panel, and more particularly, to a display panel having a reflective structure. Background Art

[0002] Display panels include transmissive display panels that selectively transmit source light generated by a light source, and emissive display panels that generate source light. To produce color images, display panels include different types of color control layers depending on the pixel. The color control layers transmit source light within a specific wavelength range or modify the color of the source light. In some cases, the color control layers do not change the color of the source light, but rather modify its optical properties.

[0003] The above information disclosed in this Background section is only for understanding the background of the present inventive concept and therefore the above information may contain information that does not constitute prior art. Summary of the Invention

[0004] The display panel constructed according to the exemplary embodiments of the present invention can improve optical efficiency.

[0005] Additional features of the present inventive concept will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practice of the present inventive concept.

[0006] According to an exemplary embodiment, a display panel includes: a light-emitting element for emitting source light and including a first electrode, a light-emitting layer disposed on the first electrode, and a second electrode disposed on the light-emitting layer; a pixel-defining layer including an opening exposing at least a portion of the first electrode; an optical conversion pattern disposed on the pixel-defining layer; a reflective pattern disposed on the light-emitting element and having an inclined surface; and a first light-shielding pattern disposed at least outside the optical conversion pattern when viewed in a plan view.

[0007] The optical conversion pattern may be in contact with the pixel defining layer.

[0008] The light emitting element may further include at least one of a hole control layer and an electron control layer overlapping the light emitting layer, and a portion of at least one of the hole control layer and the electron control layer may be disposed between the pixel defining layer and the optical conversion pattern.

[0009] The display panel may further include a color filter configured to transmit light converted from the source light by the optical conversion pattern.

[0010] A color filter may be disposed on the reflective pattern, and when viewed in a plan view, the color filter may overlap the reflective pattern and the optical conversion pattern.

[0011] The display panel may further include a first organic layer disposed on the optical conversion pattern and below the reflective pattern, wherein at least a portion of the color filter is disposed between the optical conversion pattern and the first organic layer.

[0012] The display panel may further include a second organic layer disposed on the reflective pattern and overlapping the first organic layer.

[0013] When viewed in a plan view, the reflective pattern and the first light-shielding pattern may be spaced apart from each other.

[0014] The first light-shielding pattern may include a metal layer contacting an outer side surface of the optical conversion pattern.

[0015] The first light-shielding pattern may include a black colorant in contact with an outer side surface of the optical conversion pattern.

[0016] The display panel may further include an organic layer disposed on the optical conversion pattern and under the reflective pattern, and a second light shielding pattern disposed on the organic layer and overlapping the first light shielding pattern when viewed in a plan view.

[0017] The display panel may further include at least one inorganic layer disposed between the organic layer and the light emitting element.

[0018] The optical conversion pattern may include a first pattern disposed on one side of the first electrode when viewed in a plan view and a second pattern disposed on an opposite side of the first electrode, and the inorganic layer may be disposed between the first pattern and the second pattern when viewed in a plan view.

[0019] The reflective pattern may include a lens surface having at least one of a spherical shape, an elliptical shape, a biconvex shape, and a polygonal pyramid shape, and the lens surface may include an inclined surface.

[0020] The optical conversion pattern may include a first pattern and a second pattern disposed on opposite sides of the first electrode when viewed from a plan view, the inclined surface may include a first region corresponding to the first pattern and a second region corresponding to the second pattern, and the first region and the second region may be provided as a single body.

[0021] According to another exemplary embodiment, a display panel includes: a first light-emitting element and a second light-emitting element configured to emit source light, respectively, each light-emitting element including a first electrode, a light-emitting layer disposed on the first electrode, and a second electrode disposed on the light-emitting layer; a pixel defining layer including a first opening and a second opening, the first opening and the second opening exposing at least a portion of the first electrode of a corresponding one of the first light-emitting element and the second light-emitting element; a first optical conversion pattern disposed on the pixel defining layer and disposed outside the first electrode of the first light-emitting element when viewed in a plan view; a second optical conversion pattern disposed on the pixel defining layer and disposed outside the first electrode of the second light-emitting element when viewed in a plan view; a first reflective pattern and a second reflective pattern, each including an inclined surface, and disposed on the first light-emitting element and the second light-emitting element, respectively; an insulating layer overlapping the first optical conversion pattern, the second optical conversion pattern, the first reflective pattern, and the second reflective pattern, and disposed on and below the first and second optical conversion patterns; and a light-shielding pattern disposed between the first and second optical conversion patterns when viewed in a plan view.

[0022] When viewed in a plan view, the first electrode of the first light emitting element and the first electrode of the second light emitting element may be spaced apart from each other, and the second electrode of the first light emitting element and the second electrode of the second light emitting element may be provided as a single body.

[0023] The light-shielding pattern may include a metal layer disposed on outer side surfaces of the first optical conversion pattern and the second optical conversion pattern.

[0024] The first optical conversion pattern may include first and second patterns disposed on opposite sides of the first electrode in a first direction when viewed in a plan view, and third and fourth patterns disposed on opposite sides of the first electrode in a second direction perpendicular to the first direction when viewed in a plan view.

[0025] The inclined surface may include a first region, a second region, a third region, and a fourth region corresponding to the first pattern, the second pattern, the third pattern, and the fourth pattern, respectively.

[0026] The display panel may further include a first color filter to transmit first light converted from the source light by the first optical conversion pattern, and a second color filter to transmit second light converted from the source light by the second optical conversion pattern.

[0027] Each of a portion of the first color filter and a portion of the second color filter may be disposed between the first optical conversion pattern and the second optical conversion pattern.

[0028] The light-shielding pattern may include a metal layer disposed on outer side surfaces of the first and second optical conversion patterns, and the metal layer may be disposed between the outer side surface of the first optical conversion pattern and a portion of the first color filter.

[0029] A portion of the first color filter and a portion of the second color filter may be disposed on the light shielding pattern.

[0030] According to another exemplary embodiment, a display panel includes: a light-emitting element configured to emit source light and including a first electrode, a light-emitting layer disposed on the first electrode, and a second electrode disposed on the light-emitting layer; a pixel defining layer including an opening exposing at least a portion of the first electrode; a first optical conversion pattern and a second optical conversion pattern disposed on two opposite sides of the first electrode on the pixel defining layer when viewed in a plan view; an upper insulating layer disposed on the second electrode; and a light-shielding pattern spaced apart from the first optical conversion pattern and the second optical conversion pattern when viewed in a plan view, wherein the upper insulating layer is disposed between the first optical conversion pattern and the second optical conversion pattern when viewed in a plan view, and the upper insulating layer is in contact with the first optical conversion pattern and the second optical conversion pattern.

[0031] It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to provide further explanation of the invention as claimed. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the inventive concept.

[0033] Figure 1A is a perspective view illustrating a display panel according to an exemplary embodiment.

[0034] Figure 1B is a cross-sectional view illustrating a display panel according to an exemplary embodiment.

[0035] Figure 1C is a plan view illustrating a display panel according to an exemplary embodiment.

[0036] Figure 2A is an enlarged plan view illustrating a display panel according to an exemplary embodiment.

[0037] Figure 2B is a cross-sectional view illustrating a display panel according to an exemplary embodiment.

[0038] Figure 3A is a cross-sectional view illustrating a propagation path of source light according to an exemplary embodiment.

[0039] Figure 3B is a diagram illustrating brightness of source light incident into a stack structure of a display panel according to an exemplary embodiment.

[0040] Figure 3C 、 Figure 3D 、 Figure 3E and Figure 3F is a perspective view illustrating a reflective pattern according to an exemplary embodiment.

[0041] Figure 4A and Figure 4B is an enlarged plan view illustrating a display panel according to an exemplary embodiment.

[0042] Figure 5A 、 Figure 5B 、 Figure 5C 、 Figure 5D 、 Figure 5E 、 Figure 5F 、 Figure 5G 、 Figure 5H 、 Figure 5I 、 Figure 5J and Figure 5K is a cross-sectional view illustrating a process of manufacturing a display panel according to an exemplary embodiment.

[0043] Figure 6 is a cross-sectional view illustrating a display panel according to an exemplary embodiment.

[0044] Figure 7A is an enlarged plan view illustrating a display panel according to an exemplary embodiment.

[0045] Figure 7B and Figure 7C is a perspective view illustrating a reflective pattern according to an exemplary embodiment.

[0046] Figure 8A is a cross-sectional view illustrating a display panel according to an exemplary embodiment.

[0047] Figure 8B is a cross-sectional view illustrating a process of manufacturing a display panel according to an exemplary embodiment.

[0048] Figure 9A is a cross-sectional view illustrating a display panel according to an exemplary embodiment.

[0049] Figure 9B is a cross-sectional view illustrating a process of manufacturing a display panel according to an exemplary embodiment.

[0050] Figure 10A is a cross-sectional view illustrating a display panel according to an exemplary embodiment.

[0051] Figure 10B and Figure 10Cis a cross-sectional view illustrating a process of manufacturing a display panel according to an exemplary embodiment. DETAILED DESCRIPTION

[0052] In the following description, for the purpose of explanation, many specific details are set forth to provide a thorough understanding of various exemplary embodiments or implementations of the present invention. As used herein, "embodiment" and "implementation" are interchangeable words that adopt the non-limiting examples of one or more devices or methods of the inventive concept disclosed herein. However, it is apparent that various exemplary embodiments can be put into practice without these specific details or with one or more equivalent arrangements. In other examples, known structures and devices are shown in block diagram form to avoid unnecessarily blurring various exemplary embodiments. Further, various exemplary embodiments can be different, but do not have to be exclusive. For example, without departing from the present invention, the specific shape, configuration and characteristics of exemplary embodiments can be used or implemented in another exemplary embodiment.

[0053] Unless otherwise specified, the illustrated exemplary embodiments should be understood as providing exemplary features of the details of variations in some ways in which the inventive concept may be implemented in practice. Therefore, unless otherwise specified, the features, components, modules, layers, films, panels, regions and / or aspects of the various embodiments (hereinafter individually or collectively referred to as "elements") may be combined, separated, interchanged and / or rearranged in other ways without departing from the inventive concept.

[0054] The use of cross hatching and / or shading in the accompanying drawings is generally provided to clarify the boundaries between adjacent elements. Therefore, the presence or absence of cross hatching or shading does not convey or indicate a preference or requirement for the specific material, material properties, size, ratio, commonality between the illustrated elements and / or any other characteristics, attributes, properties, etc. of the elements, unless specified. Further, in the accompanying drawings, the sizes and relative sizes of the elements may be exaggerated for clarity and / or descriptive purposes. When the exemplary embodiments can be implemented differently, a particular process can be performed in an order different from the described order. For example, two processes described in succession can be performed substantially simultaneously or in an order opposite to the described order. In addition, the same reference numerals refer to the same elements.

[0055] When an element such as a layer is referred to as being "on," "connected to," or "coupled to" another element or layer, the element may be directly on, directly connected to, or coupled to the other element or layer, or there may be intermediate elements or layers. However, when an element or layer is referred to as being "directly" "on," "directly connected to," or "directly coupled to" another element or layer, there are no intermediate elements or layers. For this purpose, the term "connected" may refer to a physical, electrical, and / or fluid connection with or without intermediate elements. Further, the D1 axis, D2 axis, and D3 axis are not limited to three axes of a rectangular coordinate system such as the x-axis, y-axis, and z-axis, and may be interpreted in a broader sense. For example, the D1 axis, D2 axis, and D3 axis may be perpendicular to each other, or may represent different directions that are not perpendicular to each other. For the purposes of this disclosure, “at least one of X, Y, and Z” and “at least one selected from the group consisting of X, Y, and Z” may be interpreted as only X, only Y, only Z, or any combination of two or more of X, Y, and Z, such as, for example, XYZ, XYY, YZ, and ZZ. As used herein, the term “and / or” includes any and all combinations of one or more of the associated listed items.

[0056] Although the terms "first," "second," etc., may be used herein to describe various types of elements, these elements should not be limited by these terms. These terms are used to distinguish one element from another. Therefore, without departing from the teachings of the present disclosure, the first element discussed below may be referred to as the second element.

[0057] For descriptive purposes, spatially relative terms such as "below," "beneath," "under," "down," "above," "upper," "above," "higher," and "side" (e.g., as in "sidewall") may be used herein and, thereby, describe the relationship of one (or more) element relative to another (or more) element as illustrated in the accompanying drawings. Spatially relative terms are intended to encompass different orientations of the device in use, operation, and / or manufacture in addition to the orientations depicted in the accompanying drawings. For example, if the device in the drawings is turned over, elements described as being "below" or "beneath" other elements or features would then be positioned as being "above" the other elements or features. Thus, the exemplary term "below" is capable of encompassing both above and below orientations. Furthermore, the device may be positioned in other ways (e.g., rotated 90 degrees or positioned in other orientations), and, therefore, the spatially relative descriptors used herein are interpreted accordingly.

[0058] As used herein, the term "comprising" and "including" are intended to be limiting in order to describe the purpose of a specific embodiment. As used herein, the singular "one" and "the" are intended to also include plural forms unless context clearly indicates otherwise. In addition, when used in this manual, the term "comprising" and / or "including" specifies the existence of stated features, integral bodies, steps, operations, elements, parts and / or their groups, but does not exclude the existence or addition of one or more other features, integral bodies, steps, operations, elements, parts and / or their groups. It should also be noted that, as used herein, the term "substantially", "approximately" and other similar terms are used as approximate terms rather than degree terms, and are therefore utilized to consider the inherent deviation in the value of measurement, calculation and / or provision that will be recognized by those of ordinary skill in the art.

[0059] Various exemplary embodiments are described herein with reference to cross-sectional illustrations and / or exploded illustrations that are schematic illustrations of idealized exemplary embodiments and / or intermediate structures. Thus, variations in the shapes of the illustrations as a result, for example, of manufacturing techniques and / or tolerances, are to be expected. Thus, the exemplary embodiments disclosed herein are not necessarily to be construed as limited to the specific illustrated shapes of the regions, but rather are to include deviations in shape that result, for example, from manufacturing. In this manner, the regions illustrated in the accompanying drawings may be schematic in nature, and the shapes of these regions may not reflect the actual shapes of the regions of the device, and therefore are not necessarily intended to be limiting.

[0060] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by those skilled in the art in the art to which the present disclosure belongs. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant art and should not be interpreted in an idealized or overly formal sense unless specifically defined as such herein.

[0061] Figure 1A is a perspective view illustrating a display panel DP according to an exemplary embodiment. Figure 1B is a cross-sectional view illustrating a display panel DP according to an exemplary embodiment. Figure 1C is a plan view illustrating a display panel DP according to an exemplary embodiment.

[0062] like Figure 1AAs shown in , the display panel DP may include a display surface DP-IS that displays an image. The display surface DP-IS may be parallel to a plane defined by a first direction axis DR1 and a second direction axis DR2. The display surface DP-IS may include a display area DA and a non-display area NDA. The pixels PX may be arranged in the display area DA, but may not be arranged in the non-display area NDA. The non-display area NDA may be defined along an edge of the display surface DP-IS. The display area DA may be surrounded by the non-display area NDA. In some exemplary embodiments, the non-display area NDA may be omitted or may be arranged near only one side portion of the display area DA.

[0063] As used herein, the third directional axis DR3 may refer to a direction perpendicular to the display surface DP-IS (i.e., the thickness direction of the display panel DP). The third directional axis DR3 may be used to distinguish the front surface or top surface from the rear surface or bottom surface of each element (e.g., layer or unit). However, the illustrated first to third directional axes DR1, DR2, and DR3 may be exemplary. Hereinafter, the first to third directions may be directions indicated by the first to third directional axes DR1, DR2, and DR3, respectively, and will be identified with the same reference numerals.

[0064] The display panel DP according to the illustrated exemplary embodiment is shown as having a flat display surface DP-IS, but the present invention is not limited thereto. In some exemplary embodiments, the display panel DP may have a curved display surface or a three-dimensional display surface. The three-dimensional display surface may include a plurality of display areas positioned in different directions.

[0065] like Figure 1B As shown in , the display panel DP may include a base layer BL, a circuit device layer DP-CL, a display device layer DP-OLED, and an optical structure layer OSL. The base layer BL may include a synthetic resin substrate or a glass substrate. The circuit device layer DP-CL may include at least one insulating layer and at least one circuit device. The circuit device may include a signal line, a pixel driving circuit, and the like. The circuit device layer DP-CL may be formed by forming an insulating layer, a semiconductor layer, and a conductive layer using a coating or deposition process and patterning the insulating layer, the semiconductor layer, and the conductive layer using a photolithography and / or etching process. The display device layer DP-OLED may include at least one display element. The optical structure layer OSL may convert the color of light provided from a display element. The optical structure layer OSL may include an optical conversion pattern and a structure for increasing the conversion efficiency of light.

[0066] Figure 1C1 and 2. The arrangement of the signal lines GL1 to GLn and DL1 to DLm and the pixels PX11 to PXnm as viewed in a plan view is illustrated. The signal lines GL1 to GLn and DL1 to DLm may include a plurality of gate lines GL1 to GLn and a plurality of data lines DL1 to DLm.

[0067] Each of the pixels PX11 to PXnm may be connected to a corresponding one of the gate lines GL1 to GLn and a corresponding one of the data lines DL1 to DLm. Each of the pixels PX11 to PXnm may include a pixel driving circuit and a display element. Depending on the structure of the pixel driving circuit of the pixels PX11 to PXnm, other types of signal lines may be further provided in the display panel DP.

[0068] exist Figure 1C , the pixels PX11 to PXnm are shown as being arranged in a matrix shape, however, the present invention is not limited thereto. In some exemplary embodiments, the pixels PX11 to PXnm may be arranged in a five-grid matrix shape. For example, the pixels PX11 to PXnm may be arranged at the vertices of a diamond structure. The gate drive circuit GDC may be integrated on the display panel DP using an oxide silicon gate (OSG) driver circuit process or an amorphous silicon gate (ASG) driver circuit process.

[0069] Figure 2A is an enlarged plan view illustrating a display panel DP according to an exemplary embodiment. Figure 2B is a cross-sectional view illustrating a display panel DP according to an exemplary embodiment.

[0070] Figure 2A Six pixel areas PXA-R, PXA-G, and PXA-B arranged along two pixel rows PXL are exemplarily illustrated. Figure 2B The diagram follows Figure 2A In the exemplary embodiment shown in the figure, Figure 2A The three kinds of pixel regions PXA-R, PXA-G, and PXA-B shown in FIG may be spread over the display area DA (eg, see FIG. Figure 1A ) are repeatedly provided. The peripheral area NPXA may be provided around the first to third pixel areas PXA-R, PXA-G, and PXA-B. The peripheral area NPXA may define the first to third pixel areas PXA-R, PXA-G, and PXA-B, and a structure for preventing color mixing problems between the first to third pixel areas PXA-R, PXA-G, and PXA-B may be provided in the peripheral area NPXA.

[0071] In the illustrated exemplary embodiment, the first to third pixel regions PXA-R, PXA-G, and PXA-B are shown as having the same planar area, but the present invention is not limited thereto. In some exemplary embodiments, at least two pixel regions among the first to third pixel regions PXA-R, PXA-G, and PXA-B may have different areas from each other. When viewed in a plan view, the first to third pixel regions PXA-R, PXA-G, and PXA-B are illustrated as having corner regions having rounded rectangular shapes, but the present invention is not limited thereto. In some exemplary embodiments, when viewed in a plan view, the first to third pixel regions PXA-R, PXA-G, and PXA-B may have other polygonal shapes, such as a diamond shape or a pentagonal shape.

[0072] One of the first to third pixel regions PXA-R, PXA-G, and PXA-B can provide a third color light corresponding to the source light, another pixel region can provide a first color light different from the third color light, and yet another pixel region can provide a second color light different from the third color light and the first color light. In the illustrated exemplary embodiment, the third pixel region PXA-B can provide the third color light. In the illustrated exemplary embodiment, the first pixel region PXA-R can provide red light, the second pixel region PXA-G can provide green light, and the third pixel region PXA-B can provide blue light.

[0073] refer to Figure 2B , the circuit device layer DP-CL may include a transistor TD used as a circuit device. The structure of the circuit device layer DP-CL may vary depending on the design of the pixel driving circuit, and Figure 2B A transistor TD is exemplarily shown in FIG. Figure 2B The arrangement of the active layer AD, source SD, drain DD, and gate GD forming the transistor TD according to an exemplary embodiment is exemplarily shown. However, the arrangement of the active layer AD, source SD, and drain DD may vary depending on the doping concentration or conductivity of the semiconductor pattern.

[0074] The circuit device layer DP-CL may include a buffer layer BFL, a first insulating layer 10, a second insulating layer 20, and a third insulating layer 30. For example, the buffer layer BFL, the first insulating layer 10, and the second insulating layer 20 may be inorganic layers, and the third insulating layer 30 may be an organic layer.

[0075] The display device layer DP-OLED may include a light-emitting element OLED. The light-emitting element OLED may generate the source light described above. The light-emitting element OLED may include a first electrode AE, a second electrode CE, and a light-emitting layer EML disposed between the first electrode AE ​​and the second electrode CE. In the illustrated exemplary embodiment, the display device layer DP-OLED may include an organic light-emitting diode serving as the light-emitting element OLED. The display device layer DP-OLED may include a pixel-defining layer PDL. For example, the pixel-defining layer PDL may be an organic layer.

[0076] The first electrode AE ​​may be disposed on the third insulating layer 30. The first electrode AE ​​may be directly or indirectly connected to the transistor TD. An opening OP may be defined in the pixel defining layer PDL. The opening OP of the pixel defining layer PDL may expose at least a portion of the first electrode AE. The opening OP may define a pixel region PXA-G.

[0077] The hole control layer HCL, the light emitting layer EML, and the electron control layer ECL may overlap at least with the pixel region PXA-G. The hole control layer HCL, the light emitting layer EML, the electron control layer ECL, and the second electrode CE may be commonly disposed in the first to third pixel regions PXA-R, PXA-G, and PXA-B (for example, see Figure 2A ). Specifically, each of the hole control layer HCL, the light emitting layer EML, the electron control layer ECL, and the second electrode CE overlapping the first to third pixel regions PXA-R, PXA-G, and PXA-B may be provided as a single body. In some exemplary embodiments, at least one of the hole control layer HCL, the light emitting layer EML, and the electron control layer ECL may include a plurality of patterns respectively provided in the first to third pixel regions PXA-R, PXA-G, and PXA-B.

[0078] The hole control layer HCL may include a hole transport layer. In an exemplary embodiment, the hole control layer HCL may further include a hole injection layer. The light-emitting layer EML may generate blue light. The blue light may have a wavelength in the range of 410 nm to 480 nm. The emission spectrum of the blue light may have a peak value in the wavelength range of 440 nm to 460 nm. The electron control layer ECL may include an electron transport layer. In an exemplary embodiment, the electron control layer ECL may further include an electron injection layer.

[0079] The display device layer DP-OLED may include an upper insulating layer TFL that protects the second electrode CE. The upper insulating layer TFL may include at least one of an organic material and an inorganic material. The upper insulating layer TFL may have a multilayer structure in which an inorganic layer and an organic layer are repeatedly provided. In an exemplary embodiment, the upper insulating layer TFL may include a sealing structure including an inorganic layer, an organic layer, and an inorganic layer. The upper insulating layer TFL may further include a refractive index control layer for improving luminous efficiency.

[0080] The optical structure layer OSL may include an optical conversion pattern CCL, a reflective pattern RFP, and a first light-shielding pattern LSP1. The optical conversion pattern CCL may be disposed on the pixel-defining layer PDL. According to the illustrated exemplary embodiment, the optical conversion pattern CCL contacts the pixel-defining layer PDL, but the present invention is not limited thereto. In some exemplary embodiments, at least one other layer may be further disposed between the pixel-defining layer PDL and the optical conversion pattern CCL.

[0081] The optical conversion pattern CCL may include a first pattern CCL-1 and a second pattern CCL-2, respectively, disposed on opposite sides of the first electrode AE. The optical conversion pattern CCL may absorb the source light generated by the light-emitting element OLED and may then generate light having a color different from the source light. The optical conversion pattern CCL may include a base resin and quantum dots mixed or dispersed in the base resin. The base resin may be a dielectric material in which quantum dots are dispersed and may be made of at least one of various resin composite materials commonly referred to as "adhesives." However, the present inventive concept is not limited thereto. As used herein, when quantum dots are capable of being dispersed in a dielectric material, the dielectric material may be referred to as a base resin, regardless of the name, additional function, or composition of the dielectric material. The base resin may be a polymer resin. For example, the base resin may be an acrylic resin, a polyurethane resin, a silicone resin, and / or an epoxy resin. The base resin may be transparent.

[0082] Quantum dots can be particles that cause the wavelength of incident light to change. Each quantum dot can have a nanoscale crystalline material composed of hundreds to thousands of atoms. Due to their small size and the resulting quantum confinement effect, each quantum dot can exhibit an increased band gap. When the energy of light incident on a quantum dot exceeds its band gap, each quantum dot can absorb light and transition to an excited state. Upon returning to its ground state, it can then emit light of a specific wavelength. The wavelength of the emitted light can be determined by the band gap. In this way, the quantum confinement effect and luminescence characteristics of a CCL can be controlled by adjusting the size or composition of the quantum dots.

[0083] The quantum dots may be selected from the group consisting of II-VI compounds, I-III-VI compounds, III-V compounds, IV-VI compounds, IV elements, IV compounds, and combinations thereof.

[0084] The II-VI compound can be selected from binary compounds (e.g., including CdSe, CdTe, ZnS, ZnSe, ZnTe, ZnO, HgS, HgSe, HgTe, MgSe, and MgS), mixtures of binary compounds, ternary compounds (e.g., including AgInS, CdSeS, CdSeTe, CdSTe, ZnSeS, ZnSeTe, ZnSTe, HgSeS, HgSeTe, HgSTe, CdZnS, CdZnSe, CdZnS, nTe, CdHgS, CdHgSe, CdHgTe, HgZnS, HgZnSe, HgZnTe, MgZnSe and MgZnS), a mixture of ternary compounds, a quaternary compound (for example, including HgZnTeS, CdZnSeS, CdZnSeTe, CdZnSTe, CdHgSeS, CdHgSeTe, CdHgSTe, HgZnSeS, HgZnSeTe and HgZnSTe) and a mixture of quaternary compounds.

[0085] The I-III-VI compound may be selected from the group consisting of a ternary compound (e.g., comprising AgInS2, CuInS2, AgGaS2, and CuGaS2), a mixture of ternary compounds, a quaternary compound (e.g., comprising AgInGaS2 and CuInGaS2), and a mixture of quaternary compounds.

[0086] The III-V compound may be selected from the group consisting of a binary compound (e.g., including GaN, GaP, GaAs, GaSb, AlN, AlP, AlAs, AlSb, InN, InP, InAs, and InSb), a mixture of a binary compound, a ternary compound (e.g., including GaNPs, GaNAs, GaNSb, GaPAs, GaPSb, AlNPs, AlNAs, AlNSb, AlPAs, AlPSb, InGaP, InAlP, InNPs, InNAs, InNSb, InPAs, and InPSb), a mixture of a ternary compound, a quaternary compound (e.g., GaAlNPs, GaAlNAs, GaAlNSb, GaAlPAs, GaAlPSb, GaInNPs, GaInNAs, GaInNSb, GaInPAs, GaInPSb, InAlNPs, InAlNAs, InAlNSb, InAlPAs, and InAlPSb), and a mixture of a quaternary compound. In an exemplary embodiment, the III-V compound may further include one of the Group II metals. For example, InZnP or the like can be selected as the III-II-V compound.

[0087] The IV-VI compound may be selected from the group consisting of binary compounds (e.g., including SnS, SnSe, SnTe, PbS, PbSe, and PbTe), mixtures of binary compounds, ternary compounds (e.g., including SnSeS, SnSeTe, SnSTe, PbSeS, PbSeTe, PbSTe, SnPbS, SnPbSe, and SnPbTe), mixtures of ternary compounds, quaternary compounds (e.g., including SnPbSSe, SnPbSeTe, and SnPbSTe), and mixtures of quaternary compounds. The IV element may be selected from the group consisting of Si, Ge, and mixtures thereof. The IV compound may include a binary compound selected from the group consisting of SiC, SiGe, and mixtures thereof.

[0088] The binary, ternary, or quaternary compound may have a uniform concentration throughout the particle, or may have a spatially varying concentration profile within each particle.

[0089] The quantum dot may have a core-shell structure including a core and a shell surrounding the core. In an exemplary embodiment, the quantum dot may have a core / shell structure in which one quantum dot is surrounded by another quantum dot. At the interface between the core and the shell, the element contained in the shell may have a concentration gradient that decreases toward the center.

[0090] Each quantum dot in the quantum dot can be a nanometer-scale particle. Each quantum dot in the quantum dot can have a light emission wavelength spectrum with a full width at half maximum (FWHM) of less than about 45 nm (specifically, less than about 40 nm, or more specifically, less than about 30 nm), and in this case, color purity or color reproduction characteristics can be improved. In addition, quantum dots can allow light to be emitted radially, and thus, viewing angle properties can be improved.

[0091] In an exemplary embodiment, the quantum dot can be a spherical nanoparticle, a pyramidal nanoparticle, a multi-arm nanoparticle or a cubic nanoparticle. In another exemplary embodiment, the quantum dot can be a nanotube, a nanowire, a nanofiber, a nanoplate-shaped particle, but the inventive concept is not limited thereto. The wavelength or color of the light emitted from the quantum dot can be determined by the particle size of the quantum dot, and therefore, when quantum dots are provided in various sizes, the light converted by the quantum dots can have various colors (e.g., red, green, and blue).

[0092] The upper insulating layer TFL may be disposed between the first and second patterns CCL-1 and CCL-2. The upper insulating layer TFL may be in contact with inner side surfaces IS of the first and second patterns CCL-1 and CCL-2.

[0093] The first light-shielding pattern LSP1 may be disposed outside the first and second patterns CCL-1 and CCL-2 and may prevent a portion of source light not converted by the optical conversion pattern CCL from leaking to the pixel area PXA-R or PXA-B adjacent to the first light-shielding pattern LSP1.

[0094] The first light-shielding pattern LSP1 may contact the outer side surfaces OS of the first and second patterns CCL-1 and CCL-2. The optical conversion pattern CCL of the pixel area PXA-R or PXA-B adjacent to the optical conversion pattern CCL of the corresponding pixel area PXA-G may be disposed in the peripheral area NPXA. The first light-shielding pattern LSP1 may contact each of the outer side surfaces OS of the two optical conversion patterns CCL.

[0095] The first light-shielding pattern LSP1 may include a metal layer. The metal layer may include a metal material with high reflectivity. For example, the metal layer may include a metal material (eg, aluminum). Source light reflected by the metal layer may be provided to the quantum dots to improve optical efficiency.

[0096] The first light-shielding pattern LSP1 may include a black colorant, a black dye, or a black pigment, and carbon black and / or a metal material such as chromium or an oxide thereof.

[0097] The reflective pattern RFP may be disposed on the light-emitting element OLED. The reflective pattern RFP may overlap with the pixel area PXA-G. The reflective pattern RFP may include a metal material having a high reflectivity. The reflective pattern RFP may include an inclined surface ICS. The reflective pattern RFP may include a first area A1 for providing source light to the first pattern CCL-1 and a second area A2 for providing source light to the second pattern CCL-2. The first area A1 and the second area A2 of the reflective pattern RFP are exemplarily illustrated as forming a single body, but the present inventive concept is not limited thereto. For example, in some exemplary embodiments, the reflective pattern RFP may include two portions that are spaced apart from each other and correspond to the first area A1 and the second area A2, respectively.

[0098] The reflective pattern RFP may be disposed on the insulating layer IL-R covering the upper insulating layer TFL and the optical conversion pattern CCL. The insulating layer IL-R may be an organic layer (hereinafter, a first organic layer). In the illustrated exemplary embodiment, the first organic layer IL-R is illustrated as a separate element from the upper insulating layer TFL, but in some exemplary embodiments, the first organic layer IL-R may be defined as a portion of the upper insulating layer TFL.

[0099] When viewed in a plan view, the reflective pattern RFP may not overlap with the first light-shielding pattern LSP1. When viewed in a plan view, a region between an edge of the reflective pattern RFP and an edge of the first light-shielding pattern LSP1 may be defined as a first light emitting region OA1.

[0100] A color filter CF-G (hereinafter, a second color filter) may be provided on the insulating layer IL-R. The color filter CF-G may transmit the converted light. The color filter CF-G may include a base resin and a dye and / or pigment dispersed in the base resin. The base resin may be an intermediate material in which a dye and / or pigment is dispersed, and may be made of at least one of various resin composite materials generally referred to as a "binder."

[0101] When viewed in a plan view, the color filter CF-G may overlap the reflective pattern RFP and the optical conversion pattern CCL.When viewed in a plan view, the color filter CF-G may overlap the first light emitting area OA1.

[0102] A second light-shielding pattern LSP2 may be provided on the color filter CF-G. The second light-shielding pattern LSP2 may include a black colorant. The second light-shielding pattern LSP2 may prevent mixing problems from occurring between adjacent pixel regions in the pixel regions PXA-R, PXA-G, and PXA-B. The second light-shielding pattern LSP2 may overlap with edges of adjacent color filters in the color filters CF-R, CF-G, and CF-B.

[0103] When viewed in a plan view, the second light-shielding pattern LSP2 may overlap the first light-shielding pattern LSP1. The area between the edge of the reflective pattern RFP and the edge of the second light-shielding pattern LSP2 may be defined as a second light-emitting area OA2. The insulating layer IL-F may be provided on the color filter CF-G to cover the second light-shielding pattern LSP2. The insulating layer IL-F may be an organic layer (hereinafter, a second organic layer). The second organic layer IL-F may provide a flat top surface.

[0104] Figure 3A is a cross-sectional view illustrating a propagation path of source light according to an exemplary embodiment. Figure 3B is a diagram illustrating brightness of source light incident into a stack structure of a display panel DP according to an exemplary embodiment. Figures 3C to 3F is a perspective view illustrating a reflective pattern RFP according to an exemplary embodiment.

[0105] like Figure 3A As shown in , source light generated by the light emitting element OLED may be incident on the reflective pattern RFP. Source light reflected by the first area A1 may be incident on the first pattern CCL-1, and source light reflected by the second area A2 may be incident on the second pattern CCL-2.

[0106] refer to Figure 3B , the light reflected by the reflective pattern RFP may be coaxially provided to the optical conversion pattern CCL. Figure 2B The structure shown in the figure is different. Figure 3B A vertical cross section defined by the second direction DR2 and the third direction DR3 is illustrated. Figure 3B The cross section of the optical conversion pattern CCL is a cross section of the optical conversion pattern CCL. Most of the light reflected by the reflective pattern RFP can be incident on the optical conversion pattern CCL, and therefore, the optical conversion pattern CCL can generate a sufficient amount of converted light. The amount of light lost when the source light is incident on the optical conversion pattern CCL can be reduced.

[0107] like Figure 3C As shown in , the reflective pattern RFP may include a biconvex lens surface. Figure 3D As shown in , the reflective pattern RFP may include two inclined surfaces. Figure 3E and Figure 3F As shown in FIG, the reflective pattern RFP may have Figure 3C and Figure 3D In this case, the source light incident into the first area A1 may be reflected to the first pattern CCL-1 (eg, see Figure 3A ), and the source light incident into the second area A2 may be reflected to the second pattern CCL-2 (eg, see Figure 3A ).

[0108] Figure 4A and Figure 4B is an enlarged plan view illustrating a display panel DP according to an exemplary embodiment. Figure 4A and Figure 4B middle, Figure 2A The three types of pixel regions PXA-R, PXA-G, and PXA-B shown in FIG. 5 are illustrated in an enlarged manner such that the second pixel region PXA-G is located at the center of each drawing.

[0109] like Figure 4A As shown in , the reflective pattern RFP may overlap with the second pixel area PXA-G. The reflective pattern RFP may completely cover the second pixel area PXA-G. The first pattern CCL-1 and the second pattern CCL-2 may be disposed near opposite sides of the second pixel area PXA-G in the first direction DR1. The second pattern CCL-2 for the first pixel area PXA-R may be disposed near the first pattern CCL-1 for the second pixel area PXA-G, and the first pattern SCL-1 for the third pixel area PXA-B may be disposed near the second pattern CCL-2 for the second pixel area PXA-G. The first pattern SCL-1 for the third pixel area PXA-B may be distinguished from the optical conversion pattern CCL, which will be referred to Figure 5B are described in more detail.

[0110] The lengths of the first and second patterns CCL-1 and CCL-2 in the second direction DR2 may correspond to the lengths of the pixel regions PXA-G in the second direction DR2. Figure 1A ), the first pattern CCL-1 and the second pattern CCL-2 may be provided for each of the second pixel regions PXA-G in the entire area of ​​the display area DA. In the display area DA, the first pattern CCL-1 and the second pattern CCL-2 may be arranged in the second direction DR2.

[0111] like Figure 4B As shown in FIG, the second electrode CE may be provided in each of the three types of pixel regions PXA-R, PXA-G, and PXA-B. The second electrode CE provided in the three types of pixel regions PXA-R, PXA-G, and PXA-B may be provided as a single body. When viewed in the entirety of the display area DA, the second electrode CE may be a single body having a plurality of openings CE-OP formed therein to correspond to the optical conversion patterns CCL.

[0112] Figures 5A to 5K is a cross-sectional view illustrating a process of manufacturing a display panel DP according to an exemplary embodiment. Figure 2B The following description is given. However, in Figures 5A to 5K 3 shows all of the three types of pixel regions PXA-R, PXA-G, and PXA-B. Figures 5A to 5K Elements disposed under the third insulating layer 30 of the circuit device layer DP-CL are not shown.

[0113] like Figure 5A As shown in FIG, the first electrodes AE of the first pixel region PXA-R, the second pixel region PXA-G, and the third pixel region PXA-B may be formed on the third insulating layer 30. The first electrodes AE may be formed by forming a conductive layer and then patterning the conductive layer. Figure 5A As shown in , the first electrode AE ​​of the first pixel region PXA-R may have the largest area, and the first electrode AE ​​of the third pixel region PXA-B may have the smallest area.

[0114] The pixel defining layer PDL may be formed on the third insulating layer 30. For example, an organic layer may be formed, and then, a photolithography process may be performed to form the pixel defining layer PDL and the opening OP.

[0115] like Figure 5B As shown in FIG, optical conversion patterns CCL1 and CCL2 may be formed on the pixel defining layer PDL. Optical conversion pattern CCL1 corresponding to the first pixel region PXA-R (hereinafter, the first optical conversion pattern) and optical conversion pattern CCL2 corresponding to the second pixel region PXA-G (hereinafter, the second optical conversion pattern) may be sequentially formed. The first optical conversion pattern CCL1 and the second optical conversion pattern CCL2 may include different quantum dots for generating different colors of light.

[0116] An optical pattern SCL corresponding to the third pixel area PXA-B may be formed on the pixel defining layer PDL. The optical pattern SCL may not include quantum dots. The optical pattern SCL may include a base resin and scattering particles mixed or dispersed in the base resin. The scattering particles may be nanoparticles, which may include titanium oxide (TiO2) or silicon dioxide. In some exemplary embodiments, the scattering particles may be omitted from the optical pattern SCL, and the first optical conversion pattern CCL1 and the second optical conversion pattern CCL2 may further include scattering particles.

[0117] like Figure 5CAs shown in , a first light-shielding pattern LSP1 of a metal layer may be formed. The metal layer may be disposed between the first optical conversion pattern CCL1, the second optical conversion pattern CCL2, and the optical pattern SCL. The metal layer may be formed, and then a patterning process may be performed to form the first light-shielding pattern LSP1 in contact with the first optical conversion pattern CCL1, the second optical conversion pattern CCL2, and the optical pattern SCL. The metal layer may be formed by a sputtering process.

[0118] like Figure 5D As shown in , other elements of the light-emitting element OLED may be further formed. At least a light-emitting layer EML and a second electrode CE may be formed. The same light-emitting layer EML may be formed in the first pixel region PXA-R, the second pixel region PXA-G, and the third pixel region PXA-B through a deposition process. At least one of a hole control layer HCL and an electron control layer ECL may be further formed.

[0119] The second electrode CE may be formed by forming a conductive layer and patterning the conductive layer. The second electrode CE may be formed to have a plurality of openings CE-OP, as shown in FIG. Figure 4B described.

[0120] like Figure 5E As shown in , the upper insulating layer TFL may be formed on the second electrode CE. The inorganic layer may be formed by depositing an inorganic material, and the organic layer may be formed by depositing an organic material. The process of depositing the inorganic material and the organic material may be performed multiple times.

[0121] like Figure 5F As shown in , a primary insulating layer IL-P may be formed. The primary insulating layer IL-P may be formed by coating and drying an organic material. The primary insulating layer IL-P may cover the optical conversion patterns CCL1 and CCL2 and the first light-shielding pattern LSP1.

[0122] like Figure 5G and Figure 5H As shown, a cavity IL-C may be formed in the primary insulating layer IL-P. A portion of the primary insulating layer IL-P may be exposed using a mask MSK1 and developed to form the cavity IL-C. The cavity IL-C may overlap with each of the three types of pixel regions PXA-R, PXA-G, and PXA-B. Figure 5G The photolithography process is shown to be performed in a negative manner, and in this case, the unexposed portion of the primary insulating layer IL-P may be partially removed. Such a chamber IL-C may be suitable for forming a Figure 3C and Figure 3D The reflection pattern RFP of the shape shown in FIG.

[0123] In another exemplary embodiment, by changing the design of the mask, the primary insulating layer IL-P corresponding to the peripheral area NPXA may be partially removed. The cavity IL-C may be formed to overlap with the peripheral area NPXA and have the greatest depth in the peripheral area NPXA. In this case, a portion of the primary insulating layer IL-P overlapping with the three types of pixel areas PXA-R, PXA-G, and PXA-B may have a relatively protruding structure compared to a portion of the primary insulating layer IL-P overlapping with the peripheral area NPXA. Such a primary insulating layer IL-P may be suitable for forming a Figure 3E and Figure 3F Although not shown, the chamber IL-C may be formed by performing a photolithography process in a forward manner.

[0124] like Figure 5H As shown in FIG, the reflective layer RFL may be formed on the first organic layer IL-R in which the cavity IL-C is formed. The reflective layer RFL may include a metal layer formed by a sputtering process.

[0125] like Figure 5I As shown in , the reflective layer RFL can be patterned by a photolithography process performed in a positive manner. Figure 5J The reflective pattern RFP shown in FIG can be formed. Figure 5G Unlike that shown in FIG, a mask MSK2 and a photoresist PRL may be used in the photolithography process in this step.

[0126] like Figure 5J As shown in FIG, color filters CF-R, CF-G, and CF-B may be formed by a photolithography process. In an exemplary embodiment, three types of color filters CF-R, CF-G, and CF-B may be formed by performing three photolithography processes. A red color filter, a green color filter, and a blue color filter may be formed to correspond to the first to third pixel regions PXA-R, PXA-G, and PXA-B, respectively.

[0127] like Figure 5K As shown in FIG, a second light shielding pattern LSP2 may be formed by a photolithography process. Thereafter, a second organic layer IL-F may be formed. An organic material may be coated to form the second organic layer IL-F having a flat top surface.

[0128] Figure 6 is a cross-sectional view illustrating a display panel DP according to another exemplary embodiment. Figure 6 According to another exemplary embodiment, Figure 2A A cross-sectional view taken along line II' of FIG. Figure 2AThe described elements of the display panel DP may be identified by the same reference numerals, and thus, repeated description of the elements will be omitted.

[0129] like Figure 6 As shown in , the hole control layer HCL, the electron control layer ECL, and the second electrode CE may be disposed on the pixel defining layer PDL and in the peripheral area NPXA. The optical conversion pattern CCL may be disposed directly on the second electrode CE. A portion of the first light-shielding pattern LSP1 may contact the second electrode CE. The light-emitting layer EML may be further disposed on the pixel defining layer PDL and in the peripheral area NPXA. In some exemplary embodiments, at least one of the hole control layer HCL, the electron control layer ECL, and the second electrode CE disposed on the pixel defining layer PDL and in the peripheral area NPXA may be omitted.

[0130] Figure 7A is an enlarged plan view illustrating a display panel DP according to an exemplary embodiment. Figure 7B and Figure 7C is a perspective view illustrating a reflective pattern RFP according to an exemplary embodiment. Figure 7A The diagram corresponds to Figure 4A Previous reference Figure 4A The described elements of the display panel DP may be identified by the same reference numerals, and thus, repeated description of the elements will be omitted.

[0131] like Figure 7A As shown in , the optical conversion pattern CCL may further include a third pattern CCL-3 and a fourth pattern CCL-4, which are spaced apart from each other in the second direction DR2 and are respectively disposed near opposite sides of the second pixel region PXA-G. The third pattern CCL-3 and the fourth pattern CCL-4 may be disposed in a peripheral area NPXA disposed between two adjacent second pixel regions in the second pixel region PXA-G in the second direction DR2.

[0132] The reflective pattern RFP may further include a third area A3 for providing source light to the third pattern CCL-3 and a fourth area A4 for providing source light to the fourth pattern CCL-4. In some exemplary embodiments, at least two of the first pattern CCL-1, the second pattern CCL-2, the third pattern CCL-3, and the fourth pattern CCL-4 may be connected to each other.

[0133] In another exemplary embodiment, the optical conversion pattern CCL may form a closed line. When the optical conversion pattern CCL surrounds the second pixel area PXA-G, the amount of lost source light may be reduced.

[0134] like Figure 7B As shown in , the reflection pattern RFP may include a lens surface having a rectangular pyramid shape. Figure 7C As shown in , the reflective pattern RFP may include a lens surface having an elliptical shape. In some exemplary embodiments, the reflective pattern RFP may include a lens surface having a polygonal shape but not a rectangular, pyramidal, or hemispherical shape. A portion of the lens surface having the above-mentioned shape may correspond to the inclined surfaces corresponding to the first pattern CCL-1, the second pattern CCL-2, the third pattern CCL-3, and the fourth pattern CCL-4.

[0135] Figure 8A is a cross-sectional view illustrating a display panel DP according to an exemplary embodiment. Figure 8B is a cross-sectional view illustrating a process of manufacturing a display panel DP according to an exemplary embodiment. Figures 1A to 5K The described elements of the display panel DP may be identified by the same reference numerals, and thus, repeated description of the elements will be omitted.

[0136] refer to Figure 8A , Figure 2B The first light shielding pattern LSP1 of the metal layer shown in FIG can be replaced by a first light shielding pattern LSP10 including a black colorant. The first light shielding pattern LSP10 including a black colorant can be a black matrix. The black matrix can be provided between the first pattern CCL-1 and the second pattern CCL-2. In addition, the black matrix can be provided between the second pattern CCL-2 and the first pattern SCL-1, as shown in FIG. Figure 8B The first light-shielding pattern LSP10 and the second light-shielding pattern LSP2 may be aligned with each other.

[0137] Different from Figure 5C , the first light-shielding pattern LSP10 of the black matrix type according to the illustrated exemplary embodiment may be formed between the patterns CCL-1, CCL-2, SCL-1, and SCL-2, as shown in FIG. Figure 8B As shown in . Can be compared with reference Figures 5D to 5K Subsequent processes are performed in the same manner as described. The first light-shielding pattern LSP10 may be formed by patterning the organic layer with a black colorant.

[0138] Figure 9A is a cross-sectional view illustrating a display panel DP according to an exemplary embodiment. Figure 9B is a cross-sectional view illustrating a process of manufacturing a display panel DP according to an exemplary embodiment. Figures 1A to 5K The described elements of the display panel DP may be identified by the same reference numerals, and thus, repeated description of the elements will be omitted.

[0139] refer to Figure 9A , Figure 2B The positions of the color filters CF-R, CF-G, and CF-B may be changed. At least a portion of the color filters CF-R, CF-G, and CF-B may be provided between the optical conversion pattern CCL and the first organic layer IL-R. A portion of the second color filter CF-G may be disposed on the first pattern CCL-1 and the second pattern CCL-2, and another portion of the second color filter CF-G may be disposed on the outer side surface OS. The other portion of the second color filter CF-G may cover the first light-shielding pattern LSP1 of the metal layer. A portion of the third color filter CF-B may be disposed on the first pattern SCL-1 and the second pattern SCL-2, and another portion of the third color filter CF-B may be disposed on the outer side surface OS, as Figure 9B As shown in .

[0140] Figure 9B The diagram shows Figure 5C The color filters CF-R, CF-G, and CF-B are formed after the step of . However, the present invention is not limited thereto, and in some exemplary embodiments, the color filters CF-R, CF-G, and CF-B may be formed after the step of . Figure 5C Steps and Figure 5E can be formed between the steps of Figures 5D to 5K The subsequent processes are performed in the same manner as described above. However, in some exemplary embodiments, Figure 5J The process may be omitted, and the second light-shielding pattern LSP2 may be directly disposed on the first organic layer IL-R.

[0141] Figure 10A is a cross-sectional view illustrating a display panel DP according to an exemplary embodiment. Figure 10B is a cross-sectional view illustrating a process of manufacturing a display panel DP according to an exemplary embodiment. Figures 1A to 5K The described elements of the display panel DP may be identified by the same reference numerals, and thus, repeated description of the elements will be omitted.

[0142] refer to Figure 10A , Figure 2B The first light-shielding pattern LSP1 of the metal layer may be replaced by a first light-shielding pattern LSP10 including a black colorant. Figure 2B The positions of the color filters CF-R, CF-G, and CF-B shown in FIG. 4 may be changed.

[0143] refer to Figure 10BThe black matrix may be disposed between the first pattern CCL-1 or SCL-1 and the second pattern CCL-2 or SCL-2. The black matrix may fill the space between the first pattern CCL-1 or SCL-1 and the second pattern CCL-2 or SCL-2 and may provide a substantially flat top surface together with the optical conversion pattern CCL or the optical pattern SCL. Color filters CF-R, CF-G, and CF-B may be disposed on the top surface of the black matrix and the optical conversion pattern CCL or the optical pattern SCL.

[0144] Different from Figure 5C In the metal layer, a black matrix can be formed between patterns CCL-1, CCL-2, SCL-1 and SCL-2, such as Figure 10B Thereafter, color filters CF-R, CF-G, and CF-B may be formed as shown in FIG. Figure 10C As shown in the. Can be compared with reference 5D to Figure 5K The subsequent processes are performed in the same manner as described above. However, in some exemplary embodiments, Figure 5J The process may be omitted, and the second light-shielding pattern LSP2 may be directly disposed on the first organic layer IL-R.

[0145] According to exemplary embodiments, the display panel DP may include a reflective structure that can increase the amount of light incident on the color control layer. Since the amount of light incident on the color control layer increases, the amount of light converted from the source light can increase. In this way, the display panel can have improved optical efficiency.

[0146] Although certain exemplary embodiments and implementations have been described herein, other embodiments and modifications will be apparent from this description. Therefore, the inventive concept is not limited to such embodiments, but rather to the broader scope of the appended claims and various obvious modifications and equivalent arrangements that will be apparent to those of ordinary skill in the art.

Claims

1. A display panel, comprising: a light-emitting element configured to emit source light and including a first electrode, a light-emitting layer provided on the first electrode, and a second electrode provided on the light-emitting layer; a pixel defining layer comprising an opening exposing at least a portion of the first electrode; an optical conversion pattern, disposed on the pixel defining layer; a reflective pattern disposed on the light emitting element and having an inclined surface; as well as a first light-shielding pattern, the first light-shielding pattern being provided at least outside the optical conversion pattern when viewed in a plan view, Wherein, when viewed in the plan view, the reflective pattern and the first light shielding pattern are spaced apart from each other.

2. The display panel according to claim 1, wherein The optical conversion pattern contacts the pixel defining layer.

3. The display panel according to claim 1, wherein: The light emitting element further includes at least one of a hole control layer and an electron control layer overlapping with the light emitting layer; and A portion of at least one of the hole control layer and the electron control layer is disposed between the pixel defining layer and the optical conversion pattern.

4. The display panel according to claim 1, further comprising: A color filter is configured to transmit light converted from the source light by the optical conversion pattern.

5. The display panel according to claim 4, wherein: The color filter is disposed on the reflective pattern; and When viewed in the plan view, the color filter overlaps the reflective pattern and the optical conversion pattern.

6. The display panel according to claim 4, further comprising: a first organic layer disposed on the optical conversion pattern and below the reflective pattern, Wherein, at least a portion of the color filter is disposed between the optical conversion pattern and the first organic layer.

7. The display panel according to claim 6, further comprising: The second organic layer is disposed on the reflective pattern and overlaps the first organic layer.

8. The display panel according to claim 1, wherein: The first light-shielding pattern includes a metal layer contacting an outer side surface of the optical conversion pattern.

9. The display panel according to claim 1, wherein: The first light-shielding pattern includes a black colorant in contact with an outer side surface of the optical conversion pattern.

10. The display panel according to claim 1, further comprising: an organic layer disposed on the optical conversion pattern and below the reflective pattern; as well as A second light-shielding pattern is disposed on the organic layer and overlaps the first light-shielding pattern when viewed in the plan view.

11. The display panel according to claim 10, further comprising: At least one inorganic layer is provided between the organic layer and the light emitting element.

12. The display panel according to claim 11, wherein: the optical conversion pattern includes a first pattern disposed on one side of the first electrode and a second pattern disposed on an opposite side of the first electrode when viewed from the plan view; and When viewed in the plan view, the inorganic layer is disposed between the first pattern and the second pattern.

13. The display panel according to claim 1, wherein: The reflective pattern includes a lens surface having at least one of a spherical shape, an elliptical shape, a biconvex shape, and a polygonal pyramid shape; and The lens surface includes the inclined surface.

14. The display panel according to claim 1, wherein: the optical conversion pattern including a first pattern and a second pattern disposed on opposite sides of the first electrode when viewed in the plan view; The inclined surface includes a first area corresponding to the first pattern and a second area corresponding to the second pattern; and The first region and the second region are provided as a single body.

15. A display panel comprising: A first light-emitting element and a second light-emitting element are configured to emit source light respectively, each light-emitting element comprising a first electrode, a light-emitting layer disposed on the first electrode, and a second electrode disposed on the light-emitting layer; a pixel defining layer comprising a first opening and a second opening, the first opening and the second opening exposing at least a portion of the first electrode of a corresponding one of the first light emitting element and the second light emitting element; a first optical conversion pattern disposed on the pixel defining layer and disposed outside the first electrode of the first light emitting element when viewed in a plan view; a second optical conversion pattern disposed on the pixel defining layer and disposed outside the first electrode of the second light emitting element when viewed in the plan view; a first reflective pattern and a second reflective pattern, each including an inclined surface, and disposed on the first light emitting element and the second light emitting element, respectively; an insulating layer overlapping the first optical conversion pattern, the second optical conversion pattern, the first reflective pattern, and the second reflective pattern, and disposed on the first optical conversion pattern and the second optical conversion pattern and below the first reflective pattern and the second reflective pattern; as well as a light-shielding pattern disposed between the first optical conversion pattern and the second optical conversion pattern when viewed in the plan view, Wherein, when viewed in the plan view, the first reflective pattern and the light shielding pattern are spaced apart from each other, and the second reflective pattern and the light shielding pattern are spaced apart from each other.

16. The display panel according to claim 15, wherein: When viewed in the plan view, the first electrode of the first light-emitting element and the first electrode of the second light-emitting element are spaced apart from each other; and The second electrode of the first light emitting element and the second electrode of the second light emitting element are provided as a single body.

17. The display panel according to claim 15, wherein: The light shielding pattern includes a metal layer disposed on outer side surfaces of the first optical conversion pattern and the second optical conversion pattern.

18. The display panel according to claim 15, wherein: The first optical conversion pattern includes: a first pattern and a second pattern disposed on opposite sides of the first electrode in a first direction when viewed in the plan view; and The third pattern and the fourth pattern are disposed on opposite sides of the first electrode in a second direction perpendicular to the first direction when viewed in the plan view.

19. The display panel according to claim 18, wherein: The inclined surface includes a first region, a second region, a third region, and a fourth region corresponding to the first pattern, the second pattern, the third pattern, and the fourth pattern, respectively.

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