Display panel

Abstract

The present application relates to a display panel. The display panel includes a first substrate including a plurality of light emitting elements to emit first light, and a second substrate disposed on the first substrate, the second substrate including a first color filter including a first blue color filter, a second blue color filter, and a third blue color filter disposed on the first substrate, a light control layer including a first light control portion to transmit the first light and disposed on the first blue color filter, a second light control portion to convert the first light into second light and disposed on the second blue color filter, and a third light control portion to convert the first light into third light and disposed on the third blue color filter, and a second color filter to expose an upper surface of the first light control portion and cover the second light control portion and the third light control portion.

Description

[0001] Cross-references to related applications

[0002] This application claims priority and benefit to Korean Patent Application No. 10-2019-0143523, filed on November 11, 2019, and Korean Patent Application No. 10-2020-0066737, filed on June 2, 2020, which are incorporated herein by reference for all purposes as fully set forth herein. Technical Field

[0003] Exemplary embodiments of the present invention generally relate to a display panel, and more specifically, to a display panel having improved light efficiency and high color reproduction. Background Technology

[0004] Various display devices are being developed for use in multimedia devices such as televisions, mobile phones, tablet computers, navigation devices, and gaming devices. These display devices include display panels with self-emitting light-emitting elements that use luminescent materials to emit light, thereby displaying images.

[0005] Furthermore, depending on the pixels, display devices include different types of light control layers to improve color reproduction. Light control layers transmit only a portion of light with a specific wavelength, or convert the wavelength of light. Light-emitting elements using quantum dots as their luminescent material are being developed, and there is a need to improve the luminous efficiency and color reproduction of light-emitting elements using quantum dots.

[0006] The information disclosed in this background section is only for understanding the background technology of the inventive concept, and therefore may contain information that does not constitute prior art. Summary of the Invention

[0007] The applicant discovered that when the light control layer of the display device is used to convert the wavelength of light, the color reproduction and light efficiency of the display device are reduced.

[0008] A display device having a display panel including a light control layer and a color filter constructed according to the principles and exemplary embodiments of the present invention provides improved color reproduction of the display panel. For example, the color filter of the display panel improves the color purity of the light emitted from the light control layer.

[0009] Furthermore, display devices having a display panel including a light-emitting layer constructed according to the principles and exemplary embodiments of the present invention provide improved light efficiency of the display panel. For example, the light-emitting layer of the display panel has improved light efficiency.

[0010] Other features of the inventive concept will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practice of the inventive concept.

[0011] According to an exemplary embodiment, the display panel includes: a first substrate including a plurality of light-emitting elements to emit first light; and a second substrate disposed on the first substrate, the second substrate including: a first color filter including a first blue color filter, a second blue color filter, and a third blue color filter disposed on the first substrate; a light control layer including a first light control portion, a second light control portion, and a third light control portion, the first light control portion being used to transmit the first light and disposed on the first blue color filter, the second light control portion being used to convert the first light into second light and disposed on the second blue color filter, and the third light control portion being used to convert the first light into third light and disposed on the third blue color filter; and a second color filter exposing the upper surface of the first light control portion and covering the second light control portion and the third light control portion.

[0012] The first blue filter, the second blue filter, and the third blue filter can be arranged to be spaced apart from each other, and the second substrate can also include a first dividing pattern disposed between the first blue filter, the second blue filter, and the third blue filter.

[0013] The first dividing pattern may include the same material as the second color filter.

[0014] The first dividing pattern may include black colorant.

[0015] The display panel may also include a second dividing pattern and a third dividing pattern disposed above the light control layer and may not overlap with the first light control portion, the second light control portion and the third light control portion, wherein: the second dividing pattern may include a black colorant, and the third dividing pattern may be disposed on the second dividing pattern and include a blue colorant.

[0016] Each of the plurality of light-emitting elements may include a first electrode, a second electrode, and an organic layer disposed between the first electrode and the second electrode, the organic layer including a first light-emitting layer to generate first light.

[0017] The first electrode of each of the plurality of light-emitting elements may overlap with each of the first blue filter, the second blue filter and the third blue filter, and the area of ​​each of the first blue filter, the second blue filter and the third blue filter in the plan view may be greater than the area of ​​the first electrode in the plan view.

[0018] The organic layer may also include a second light-emitting layer to emit second light, and the second blue filter may be provided with a first opening defined therethrough, and the first opening may overlap with the second light control portion.

[0019] The organic layer may also include a third light-emitting layer to emit a third light, and the third blue filter may be provided with a second opening defined therethrough, and the second opening may overlap with the third light control portion.

[0020] Each of the first blue filter, the second blue filter, and the third blue filter can be configured to transmit the first light, and the second filter can include a material for absorbing the first light.

[0021] The first light can be blue, the second light can be green, and the third light can be red.

[0022] The second color filter can be configured to transmit both a second and a third light.

[0023] The second blue filter can extend from the first blue filter, and the third blue filter can extend from the second blue filter.

[0024] The display panel may also include a barrier wall, which may not overlap with the first light control portion, the second light control portion and the third light control portion and may be disposed between the first color filter and the second color filter, wherein: the barrier wall may include a first barrier wall, a second barrier wall and a third barrier wall stacked in sequence, the first barrier wall may be made of the same material as the second color filter, the second barrier wall may be made of an inorganic material and the third barrier wall may be made of an organic material.

[0025] According to another exemplary embodiment, the display panel includes: a first color filter configured to overlap with a first light-emitting region, a second light-emitting region, and a third light-emitting region; a first light control portion overlapping with the first light-emitting region and disposed on the first color filter; a second light control portion overlapping with the second light-emitting region and disposed on the first color filter; a third light control portion overlapping with the third light-emitting region and disposed on the first color filter; and a second color filter disposed on the first color filter and covering the second light control portion and the third light control portion, wherein: a first light-emitting element is disposed in the first light-emitting region, a second light-emitting element is disposed in the second light-emitting region, and a third light-emitting element is disposed in the third light-emitting region, the first light-emitting element, the second light-emitting element, and the third light-emitting element are configured to emit first light, and a non-light-emitting region is defined to be adjacent to the first light-emitting region, the second light-emitting region, and the third light-emitting region.

[0026] According to another exemplary embodiment, a display panel includes: a first substrate including a plurality of light-emitting elements to emit first light; and a second substrate disposed on the first substrate and including a light-emitting region in which the light-emitting elements are disposed and a non-light-emitting region defined adjacent to the light-emitting region. The second substrate includes: a first color filter disposed on the first substrate and for transmitting the first light; a first light control portion, a second light control portion, and a third light control portion disposed on the first color filter and overlapping the light-emitting region; a barrier wall overlapping the non-light-emitting region and disposed on the first color filter; and a second color filter covering the barrier wall, the second light control portion, and the third light control portion, and exposing the upper surface of the first light control portion, wherein: the first light control portion is configured to transmit the first light, the second light control portion is configured to convert the first light into second light, the third light control portion is configured to convert the first light into third light, and the second color filter is configured to absorb the first light.

[0027] The barrier wall may include a first barrier wall, a second barrier wall, and a third barrier wall stacked in sequence, wherein: the first barrier wall may be made of the same material as the second color filter, the second barrier wall may be made of an inorganic material, and the third barrier wall may be made of an organic material.

[0028] At least a portion of the second barrier can be inserted into each of the first, second, and third light control sections.

[0029] Each of the light-emitting elements may include a first electrode, a second electrode, and an organic layer disposed between the first electrode and the second electrode, the organic layer including a first light-emitting layer to generate first light.

[0030] The organic layer may also include a second light-emitting layer for emitting a second light or a third light-emitting layer for emitting a third light, and the first color filter may be provided with an opening defined therethrough.

[0031] It will be understood that both the foregoing overview and the following detailed description are exemplary and illustrative, and are intended to provide further explanation of the claimed invention. Attached Figure Description

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

[0033] Figure 1A This is a perspective view of an exemplary embodiment of a display panel constructed according to the principles of the present invention.

[0034] Figure 1B yes Figure 1AA cross-sectional view of the display panel.

[0035] Figure 2 yes Figure 1A A floor plan of the display panel.

[0036] Figure 3 yes Figure 1A A floor plan of a portion of the display panel.

[0037] Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 and Figure 9 It is along Figure 3 The line I-I' intercepted and shown Figure 1A Cross-sectional views of various exemplary embodiments of the display panel.

[0038] Figure 10A , Figure 10B , Figure 10C , Figure 10D , Figure 10E , Figure 10F , Figure 10G , Figure 10H and Figure 10I It shows the manufacturing process. Figure 1A A cross-sectional view of the method of using a second substrate for a display panel.

[0039] Figure 11 It shows Figure 1A The curve showing the transmittance of the second color filter of the display panel as a function of wavelength.

[0040] Figure 12 It shows the result of Figure 1A A graph showing the emission spectrum of the light generated by the display panel after the light passes through the second light control section of the display panel.

[0041] Figure 13 It shows Figure 12 A graph of the emission spectrum of light after it passes through the second color filter of the display panel.

[0042] Figure 14 It shows the result of Figure 1A A graph showing the emission spectrum of the light generated by the display panel after the light passes through the third light control section of the display panel.

[0043] Figure 15 It shows Figure 14 The light, in the light passing through Figure 1A A graph of the emission spectrum after the second color filter of the display panel.

[0044] Figure 16A It is along Figure 3 The line I-I' intercepted and shown Figure 1A A cross-sectional view of another exemplary embodiment of the display panel.

[0045] Figure 16B yes Figure 16A A cross-sectional view of the light-emitting elements of the display panel.

[0046] Figure 17A , Figure 17B , Figure 17C and Figure 17D It shows the result of Figure 16A A graph of the spectrum of the first mixed light generated by the display panel.

[0047] Figure 18A , Figure 18B , Figure 18C and 18D It shows the result of Figure 16A Another example of a display panel is a graph of the spectrum of the first mixed light generated.

[0048] Figure 19A It is along Figure 3 The line I-I' intercepted and shown Figure 1A A cross-sectional view of another exemplary embodiment of the display panel.

[0049] Figure 19B yes Figure 19A A cross-sectional view of the light-emitting elements of the display panel. Detailed Implementation

[0050] In the following description, numerous specific details are set forth for illustrative purposes to provide a thorough understanding of various exemplary embodiments or implementations of the invention. As used herein, “implementation” and “method” are interchangeable terms and are non-limiting examples of apparatuses or methods employing one or more of the inventive concepts disclosed herein. However, it will be apparent that various exemplary embodiments may be practiced without these specific details or with one or more equivalent arrangements. In other instances, well-known structures and apparatuses are shown in block diagram form to avoid unnecessarily obscuring the various exemplary embodiments. Furthermore, the various exemplary embodiments may be different, but are not necessarily exclusive. For example, a particular shape, configuration, and characteristic of an exemplary embodiment may be used or implemented in another exemplary embodiment without departing from the inventive concept.

[0051] Unless otherwise stated, the exemplary embodiments shown should be understood as providing exemplary features of different details of some ways in which the inventive concept can be implemented in practice. Therefore, unless otherwise stated, features, components, modules, layers, films, panels, regions and / or aspects (hereinafter individually or collectively referred to as “elements”) of various embodiments may be combined, separated, interchanged and / or rearranged without departing from the inventive concept.

[0052] The use of crosshairs and / or shading in the accompanying drawings is generally to clarify the boundaries between adjacent elements. Therefore, unless otherwise stated, the presence or absence of crosshairs or shading does not convey or indicate any preference or requirement for a particular material, material properties, size, scale, commonalities between illustrated elements, and / or any other characteristics, properties, etc., of the elements. Furthermore, in the accompanying drawings, the dimensions and relative dimensions of elements may be exaggerated for clarity and / or descriptive purposes. When exemplary embodiments can be implemented differently, the specific order of processes may be performed differently than the order described. For example, two consecutively described processes may be performed substantially simultaneously, or in the reverse order of their description. Furthermore, the same reference numerals denote the same elements.

[0053] When an element, such as a layer, is referred to as being "on," "connected to," or "attached to" another element or layer, it may be directly on, directly connected to, or attached to the other element or layer, or there may be an intermediate element or layer. However, when an element or layer is referred to as being "directly on," "directly connected to," or "directly attached to" another element or layer, there is no intermediate element or layer. Therefore, the term "connection" can refer to a physical connection, electrical connection, and / or fluid connection, with or without an intermediate element. Furthermore, the DR1, DR2, and DR3 axes are not limited to the three axes of a Cartesian coordinate system (such as the x, y, and z axes) and can be interpreted in a broader sense. For example, the DR1, DR2, and DR3 axes can be perpendicular to each other, or they can 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 set consisting of X, Y, and Z" can be interpreted as only X, only Y, only Z, or any combination of two or more of X, Y, and Z, such as 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.

[0054] 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 this disclosure, the first element discussed below may be referred to as the second element.

[0055] Spatial relative terms such as “beneath,” “below,” “under,” “lower,” “above,” “upper,” “over,” “higher,” and “side” (e.g., as in “sidewall”) may be used herein for descriptive purposes and thus to describe the relationship of one element to another(s) as shown in the accompanying drawings. In addition to the orientations depicted in the drawings, spatial relative terms are intended to cover different orientations of the device in use, operation, and / or manufacture. For example, if the device in the drawings is flipped, an element described as “below” or “under” other elements or features will then be oriented “above” other elements or features. Thus, the exemplary term “below” can cover both above and below orientations. Furthermore, the device may be oriented in other ways (e.g., rotated 90 degrees or in other orientations), and thus the spatial relative descriptive terms used herein shall be interpreted accordingly.

[0056] The terminology used herein is for the purpose of describing particular embodiments and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “the” are intended to include the plural forms as well, as used herein. Furthermore, when used in this specification, the terms “comprising,” “including,” “comprises,” and / or “including” indicate the presence of stated features, integrals, steps, operations, elements, components, and / or sets thereof, but do not preclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or sets thereof. It should also be noted that, as used herein, the terms “substantially,” “about,” and other similar terms are used as approximate terms rather than terms of degree, and are therefore used to allow for inherent deviations in measurements, calculated values, and / or provided values ​​that will be recognized by those skilled in the art.

[0057] Various exemplary embodiments are described herein with reference to cross-sectional and / or exploded views, which are schematic diagrams of idealized exemplary embodiments and / or intermediate structures. Therefore, deviations from the illustrated shapes due to, for example, manufacturing techniques and / or tolerances are expected. Consequently, the exemplary embodiments disclosed herein should not necessarily be construed as limited to the specific shapes of the regions shown, but will include deviations in shape due to, for example, manufacturing processes. In this way, the regions shown in the figures may be schematic in nature, and the shapes of these regions may not reflect the actual shapes of the areas of the device, and are therefore not necessarily intended to be limiting.

[0058] Unless otherwise specified, all terms used herein (including technical and scientific terms) shall have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure pertains. Terms, such as those defined in commonly used dictionaries, shall be interpreted as having the same meaning as they have in the context of the relevant art and shall not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

[0059] In the following description, exemplary embodiments will be described with reference to the accompanying drawings.

[0060] Figure 1A This is a perspective view of an exemplary embodiment of a display panel constructed according to the principles of the present invention. Figure 1B yes Figure 1A A cross-sectional view of the display panel. Figure 2 yes Figure 1A A floor plan of the display panel. Figure 3 yes Figure 1A A floor plan of a portion of the display panel. Figures 4 to 9 It is along Figure 3 The line I-I' intercepted and shown Figure 1A Cross-sectional views of various exemplary embodiments of the display panel.

[0061] Reference Figure 1A , Figure 1B and Figure 2 The display panel DP can be one of a liquid crystal display panel, an electrophoretic display panel, a microelectromechanical system (MEMS) display panel, an electrowetting display panel, and an organic light-emitting display panel. However, exemplary embodiments are not limited thereto.

[0062] The display panel DP may also include a rack or molded component, and depending on the type of display panel DP, it may also include a backlight unit.

[0063] The display panel DP may include a first substrate 100 (or a lower display substrate) and a second substrate 200 (or an upper display substrate) facing and spaced apart from the first substrate 100. A predetermined cell gap may be formed between the first substrate 100 and the second substrate 200. The cell gap may be maintained by a sealant SLM that bonds the first substrate 100 and the second substrate 200. A grayscale display layer may be disposed between the first substrate 100 and the second substrate 200 to generate an image. Depending on the type of display panel DP, the grayscale display layer may include one of a liquid crystal layer, an organic light-emitting layer, and an electrophoretic layer.

[0064] like Figure 1A As shown, the display panel DP can display images via the display surface DP-IS. Figure 1B The outer surface 200-OS of the second substrate 200 shown can be defined as the display surface DP-IS.

[0065] The display surface DP-IS may be substantially parallel to the plane defined by the first direction DR1 and the second direction DR2. The display surface DP-IS may include a display area DA and a non-display area NDA. Pixels PX may be arranged in the display area DA and may not be arranged in the non-display area NDA. The non-display area NDA may be defined along the edge of the display surface DP-IS. The display area DA may be surrounded by the non-display area NDA. According to an exemplary embodiment, the non-display area NDA may be omitted, or may be provided only on one side of the display area DA.

[0066] The third direction DR3 can indicate the normal direction of the display surface DP-IS, i.e., the thickness direction of the display panel DP. The front (or upper) surface and rear (or lower) surface of each layer or unit described below are distinguished from each other by the third direction DR3. However, the first direction DR1, the second direction DR2, and the third direction DR3 are merely exemplary.

[0067] In an exemplary embodiment, the display panel DP includes a flat-shaped display surface DP-IS. However, the exemplary embodiment is not limited thereto. For example, the display panel DP may include a curved display surface or a three-dimensional display surface. A three-dimensional display surface may include multiple display areas facing each other in different directions.

[0068] Figure 2 The plan view shows the arrangement of signal lines GL1 to GLn and DL1 to DLm, and pixels PX11 to PXnm. Signal lines GL1 to GLn and DL1 to DLm may include multiple gate lines GL1 to GLn and multiple data lines DL1 to DLm.

[0069] Each of pixels PX11 to PXnm can be connected to a corresponding gate line among gate lines GL1 to GLn and a corresponding data line among data lines DL1 to DLm. Each of pixels PX11 to PXnm can include pixel driving circuitry and a display element. Depending on the configuration of the pixel driving circuitry of pixels PX11 to PXnm, different types of signal lines can be set in the display panel DP.

[0070] Pixels PX11 to PXnm can be arranged in a matrix, however, they are not limited to or restricted by this. Pixels PX11 to PXnm can be arranged in a pentile pixel array. Pixels PX11 to PXnm can be arranged in a diamond pixel array. The gate drive circuit GDC can be integrated into the display panel DP using either silicon oxide gate driver circuit (OSG) or amorphous silicon gate driver circuit (ASG) technology.

[0071] Reference Figure 3 The display panel DP may include a non-emitting area NPXA and emitting areas PXA-R, PXA-G, and PXA-B. Each of the emitting areas PXA-R, PXA-G, and PXA-B may consist of multiple light-emitting elements EE (see reference). Figure 4 The light emitted from the corresponding light-emitting element in the panel is emitted from it. The light-emitting areas PXA-R, PXA-G, and PXA-B can have different sizes from each other, and in this case, the size can be understood as the size when viewed in a plane. In this specification, the phrase "when viewed in a plane" can mean viewing the display panel DP in the third direction DR3 (thickness direction). The light-emitting areas PXA-R, PXA-G, and PXA-B can be divided into multiple groups according to the color of the light generated by the light-emitting element EE. For example, each of the light-emitting areas PXA-R, PXA-G, and PXA-B can correspond to a pixel.

[0072] Figure 3 The display panel DP shown may include three light-emitting regions PXA-R, PXA-G, and PXA-B that emit a first light, a second light, and a third light, respectively, as a representative example. For example, the display panel DP may include a first light-emitting region PXA-B, a second light-emitting region PXA-G, and a third light-emitting region PXA-R that are distinct from each other.

[0073] The light-emitting element EE disposed in the first light-emitting region PXA-B can be defined as a first light-emitting element. The light-emitting element EE disposed in the second light-emitting region PXA-G can be defined as a second light-emitting element. The light-emitting element EE disposed in the third light-emitting region PXA-R can be defined as a third light-emitting element.

[0074] According to an exemplary embodiment, the display panel DP may include a light-emitting element EE that emits a first light (refer to...). Figure 4 For example, the first light-emitting element, the second light-emitting element, and the third light-emitting element can emit a first light.

[0075] Furthermore, the display panel DP according to the exemplary embodiment may include light control sections WCL1, WCL2, and WCL3 (see reference). Figure 4 ( ), which transmits or absorbs the first light to emit light with wavelength regions different from each other. The light control sections WCL1, WCL2, and WCL3 (see reference) Figure 4 The first light can be absorbed or transmitted to emit light with different colors from each other. For example, the first light control section WCL1 can transmit the first light, the second light control section WCL2 can absorb the first light and emit the second light, and the third light control section WCL3 can absorb the first light and emit the third light. However, the exemplary embodiments are not limited thereto or are not limited thereto. For example, the first light can be blue light, the second light can be green light, and the third light can be red light. For example, the first light can be blue light with a center wavelength equal to or greater than about 420 nm and equal to or less than about 480 nm, the second light can be green light with a center wavelength equal to or greater than about 500 nm and equal to or less than about 580 nm, and the third light can be red light with a center wavelength equal to or greater than about 600 nm and equal to or less than about 670 nm.

[0076] The light control units WCL1, WCL2, and WCL3 can be configured to correspond to the first light-emitting region PXA-B, the second light-emitting region PXA-G, and the third light-emitting region PXA-R, respectively, and can overlap with the first light-emitting region PXA-B, the second light-emitting region PXA-G, and the third light-emitting region PXA-R in a planar diagram. For example, the first light-emitting region PXA-B can be a blue light-emitting region, the second light-emitting region PXA-G can be a green light-emitting region, and the third light-emitting region PXA-R can be a red light-emitting region.

[0077] In a display panel DP according to an exemplary embodiment, first light-emitting regions PXA-B and third light-emitting regions PXA-R can be arranged alternately in a first direction DR1, and can form a first group of PXG1. Second light-emitting regions PXA-G can be arranged in a second direction DR2, and can form a second group of PXG2.

[0078] The first group of PXG1 can be arranged spaced apart from the second group of PXG2 in the second direction DR2. Each of the first group of PXG1 and the second group of PXG2 can be arranged in multiples. The first group of PXG1 and the second group of PXG2 can be arranged alternately in the second direction DR2.

[0079] A second luminescent region PXA-G can be positioned in the fourth direction DR4, spaced apart from either a first luminescent region PXA-B or a third luminescent region PXA-R. The fourth direction DR4 can be the direction between the first direction DR1 and the second direction DR2.

[0080] Figure 3 The arrangement of the light-emitting regions PXA-R, PXA-G, and PXA-B shown can be referred to as a pentile structure. However, the arrangement of the light-emitting regions PXA-R, PXA-G, and PXA-B in the display panel DP is not limited to... Figure 3 The arrangement structure shown is illustrated. For example, the light-emitting regions PXA-R, PXA-G, and PXA-B can be arranged in a stripe structure, wherein the first light-emitting region PXA-B, the second light-emitting region PXA-G, and the third light-emitting region PXA-R are arranged sequentially in the second direction DR2.

[0081] Furthermore, depending on the color of the light emitted from the light control portions WCL1, WCL2, and WCL3, the emitting regions PXA-R, PXA-G, and PXA-B can have different sizes. For example, the first emitting region PXA-B corresponding to the first light control portion WCL1 that emits the first light can have the largest size, and the second emitting region PXA-G corresponding to the second light control portion WCL2 that emits the second light can have the smallest size. However, the exemplary embodiment is not limited to this or not limited thereto. For example, the emitting regions PXA-R, PXA-G, and PXA-B can have the same size as each other, or the emitting regions PXA-R, PXA-G, and PXA-B can be provided with a different area ratio than in this embodiment. In the following, for ease of explanation, the emitting regions PXA-R, PXA-G, and PXA-B are... Figures 4 to 9 They will be described as having the same size. However, when... Figure 3 The pentile structure shown is applied to Figures 4 to 9 When considering the light-emitting regions PXA-R, PXA-G, and PXA-B, the first light-emitting region PXA-B, corresponding to the first light control portion WCL1 that emits the first light, can have the largest size, and the second light-emitting region PXA-G, corresponding to the second light control portion WCL2 that emits the second light, can have the smallest size. However, the exemplary embodiments are not limited thereto.

[0082] Reference Figure 4 The display panel DP may include a first substrate 100 and a second substrate 200.

[0083] The first substrate 100 may include a first base substrate BS1, a circuit layer CL, a light-emitting element EE, a thin-film encapsulation layer TFE, and a buffer layer BFL. The first base substrate BS1, the circuit layer CL, the light-emitting element EE, the thin-film encapsulation layer TFE, and the buffer layer BFL may be sequentially stacked on a third-direction DR3. However, the configuration of the first substrate 100 is not limited thereto or is not restricted thereto.

[0084] The first base substrate BS1 can provide a base surface on which the light-emitting element EE is disposed. The first base substrate BS1 may include a synthetic resin substrate or a glass substrate. The first base substrate BS1 may be rigid or flexible. In an exemplary embodiment, the first base substrate BS1 may be rigid. However, the exemplary embodiment is not limited thereto or is not limited thereto.

[0085] A circuit layer CL may be disposed on a first base substrate BS1. The circuit layer CL may include multiple transistors. Each of the transistors may include a control electrode, an input electrode, and an output electrode. For example, the circuit layer CL may include a switching transistor and a driving transistor for driving a light-emitting element EE.

[0086] A pixel defining layer (PDL) can be disposed on the circuit layer (CL). The PDL can define light-emitting regions PXA-R, PXA-G, and PXA-B. The light-emitting regions PXA-R, PXA-G, and PXA-B can be distinguished from the non-light-emitting region NPXA by the PDL. The non-light-emitting region NPXA can be a region defined between adjacent light-emitting regions PXA-R, PXA-G, and PXA-B, and can correspond to the pixel defining layer (PDL). The PDL can be formed from a polymer resin. For example, the PDL can be formed from a polyacrylate-based resin or a polyimide-based resin.

[0087] Furthermore, the pixel-defining layer (PDL) may include inorganic materials. For example, the pixel-defining layer (PDL) may include silicon nitride (SiN). x ), silicon oxide (SiO) x ), silicon nitride oxide (SiO) x N y )wait.

[0088] Each of the light-emitting elements EE may include a first electrode EL1, a second electrode EL2, and at least one organic layer OL. The first electrode EL1 may be disposed on the circuit layer CL. The first electrode EL1 may be electrically connected to a driving transistor to receive a driving signal. The first electrode EL1 may be disposed at multiple openings defined in the pixel defining layer PDL, spaced apart from each other. The second electrode EL2 may be disposed on the first electrode EL1. The organic layer OL may be disposed between the first electrode EL1 and the second electrode EL2.

[0089] The first electrode EL1 and the second electrode EL2 of the light-emitting element EE may be conductive. The first electrode EL1 and the second electrode EL2 may comprise a metal alloy or a conductive compound. The first electrode EL1 may be an anode. The first electrode EL1 may be a pixel electrode. The second electrode EL2 may be a cathode. The second electrode EL2 may be a common electrode. Each of the first electrode EL1 and the second electrode EL2 of the light-emitting element EE may be a reflective electrode, a transmissive electrode, or a semi-transmissive reflective electrode. In an exemplary embodiment, the first electrode EL1 may be a reflective electrode, and the second electrode EL2 may be a transmissive electrode or a semi-transmissive reflective electrode.

[0090] An organic layer OL may include a hole transport region, a light-emitting layer, and an electron transport region. However, exemplary embodiments are not limited thereto or are not limited thereto. The hole transport region may include a hole injection layer and a hole transport layer. The electron transport region may include an electron injection layer and an electron transport layer. For example, the organic layer OL may also include a charge generation layer and multiple light-emitting layers. This will be referred to... Figure 16A and Figure 16B Provide a detailed description.

[0091] The light-emitting layer can have a single-material or a single-layer structure of multiple different materials, or a multi-layer structure formed of different materials. In the case that the display panel DP is an organic electroluminescent display panel, the organic layer OL can include anthracene derivatives, pyrene derivatives, fluoranthene derivatives, etc. Derivatives, dihydrobenzanthracene derivatives, or benzo[a]phenanthrene derivatives. Specifically, the luminescent layer may include anthracene derivatives and pyrene derivatives.

[0092] When the display panel DP is an organic electroluminescent display panel, the organic layer OL may include a substrate and dopants. Specifically, the light-emitting layer of the organic layer OL may include a substrate and dopants. For example, the light-emitting layer may include at least one of bis[2-(diphenylphosphino)phenyl]ether oxide (DPEPO), 4,4'-bis(carbazole-9-yl)biphenyl (CBP), 1,3-bis(carbazole-9-yl)benzene (mCP), 2,8-bis(diphenylphosphino)dibenzo[b,d]furan (PPF), 4,4',4”-tris(carbazole-9-yl)triphenylamine (TCTA), and 1,3,5-tris(N-phenylbenzimidazol-2-yl)benzene (TPBi) as the host material. However, exemplary embodiments are not limited thereto or are not restricted thereto. For example, tris(8-hydroxyquinoline)aluminum (Alq3), 4,4'-bis(N-carbazole)-1,1'-biphenyl (CBP), poly(N-vinylcarbazole) (PVK), 9,10-bis(naphthalene- 2-yl)anthracene (ADN), 4,4',4”-tris(carbazole-9-yl)-triphenylamine (TCTA), 1,3,5-tris(N-phenylbenzimidazol-2-yl)benzene (TPBi), 3-tert-butyl-9,10-di(naphthyl-2-yl)anthracene (TBADN), stilbeneyl arylene (DSA), 4,4'-bis(9-carbazole)-2,2'-dimethyl-biphenyl (CDBP), 2-methyl-9,10-bis(naphthyl-2-yl)anthracene (MADN), hexaphenylcyclotriphosphazene (CP1), 1,4-bis(triphenylsilyl)benzene (UGH2), hexaphenylcyclotrisiloxane (DPSiO3), octaphenylcyclotetrasiloxane (DPSiO4), 2,8-bis(diphenylphospho)dibenzofuran (PPF) and others can be used as host materials.

[0093] In addition, the light-emitting layer may include styrene derivatives (e.g., 1,4-bis[2-(3-N-ethylcarbazolyl)vinyl]benzene (BCzVB), 4-(di-p-tolylamino)-4'-[(di-p-tolylamino)styrene]stilbene (DPAVB) and N-(4-((E)-2-(6-((E)-4-(diphenylamino)styrene)naphth-2-yl)vinyl)phenyl)-N-phenylaniline (N-BDAVBi)), perylene and its derivatives (e.g., 2,5,8,11-tetra-tert-butylperylene (TBP)), pyrene and its derivatives (e.g., 1,1-dipyrene, 1,4-dipyrenebenzene, 1,4-bis(N,N-diphenylamino)pyrene) as dopant materials.

[0094] When the luminescent layer includes quantum dots, the core of the quantum dots can be selected from group II-VI compounds, group III-V compounds, group IV-VI compounds, group IV elements, group IV compounds, and combinations thereof.

[0095] Group II-VI compounds can be selected from binary compounds (selected from the group consisting of CdSe, CdTe, CdS, ZnS, ZnSe, ZnTe, ZnO, HgS, HgSe, HgTe, MgSe, MgS and mixtures thereof) and ternary compounds (selected from AgInS, CuInS, CdSeS, CdSeTe, CdSTe, ZnSeS, ZnSeTe, ZnSTe, HgSeS, HgSeTe, HgSTe, CdZnS, CdZn). The group consisting of Se, CdZnTe, CdHgS, CdHgSe, CdHgTe, HgZnS, HgZnSe, HgZnTe, MgZnSe, MgZnS and mixtures thereof) and quaternary compounds (selected from the group consisting of HgZnTeS, CdZnSeS, CdZnSeTe, CdZnSTe, CdHgSeS, CdHgSeTe, CdHgSTe, HgZnSeS, HgZnSeTe, HgZnSTe and mixtures thereof).

[0096] III-V group compounds can be selected from binary compounds (selected from the set of GaN, GaP, GaAs, GaSb, AlN, AlP, AlAs, AlSb, InN, InP, InAs, InSb and mixtures thereof), ternary compounds (selected from the set of GaNP, GaNAs, GaNSb, GaPAs, GaPSb, AlNP, AlNAs, AlNSb, AlPAs, AlPSb, InGaP, InNP, InNAs, InNSb, InPAs, InPSb, GaAlNP and mixtures thereof), and quaternary compounds (selected from the set of GaAlNAs, GaAlNSb, GaAlPAs, GaAlPSb, GaInNP, GaInNAs, GaInNSb, GaInPAs, GaInPSb, InAlNP, InAlNAs, InAlNSb, InAlPAs, InAlPSb and mixtures thereof).

[0097] Group IV-VI compounds can be selected from binary compounds (selected from the set of SnS, SnSe, SnTe, PbS, PbSe, PbTe and mixtures thereof), ternary compounds (selected from the set of SnSeS, SnSeTe, SnSTe, PbSeS, PbSeTe, PbSTe, SnPbS, SnPbSe, SnPbTe and mixtures thereof), and quaternary compounds (selected from the set of SnPbSSe, SnPbSeTe, SnPbSTe and mixtures thereof). Group IV elements can be selected from the set of Si, Ge and mixtures thereof. Group IV compounds can be binary compounds selected from the set of SiC, SiGe and mixtures thereof.

[0098] In this context, binary, ternary, or quaternary compounds can exist in the particles at a uniform concentration, or they can exist in the same particle after being divided into multiple fractions with different concentrations. Furthermore, quantum dots can have a core-shell structure, in which one quantum dot surrounds another.

[0099] In some exemplary embodiments, quantum dots may have the core-shell structure described above, comprising a core containing nanocrystals and a shell surrounding the core. The shell of the quantum dot may serve as a protective layer to prevent chemical modification of the core and maintain semiconductor properties, and / or as a charge layer to impart electrophoretic properties to the quantum dot. The shell may have a single-layer or multi-layer structure. In the core-shell structure, the concentration of elements present in the shell may have a concentration gradient that gradually decreases from the shell to the center. As the shell of the quantum dot, oxides of metals or non-metals, semiconductor compounds, or combinations thereof may be used.

[0100] For example, the oxides of metals or nonmetals can be binary compounds (such as SiO2, Al2O3, TiO2, ZnO, MnO, Mn2O3, Mn3O4, CuO, FeO, Fe2O3, Fe3O4, CoO and Co3O4, NiO) or ternary compounds (such as MgAl2O4, CoFe2O4, NiFe2O4 and CoMn2O4). However, exemplary embodiments are not limited thereto or are not limited thereto.

[0101] The semiconductor compound can be CdS, CdSe, CdTe, ZnS, ZnSe, ZnTe, ZnSeS, ZnTeS, GaAs, GaP, GaSb, HgS, HgSe, HgTe, InAs, InP, InGaP, InSb, AlAs, AlP, and AlSb. However, exemplary embodiments are not limited thereto or are not limited thereto.

[0102] Quantum dots can have a full width at half maximum (FWHM) of the emission wavelength spectrum, which is about 45 nm or less, preferably about 40 nm or less, and more preferably about 30 nm or less, and can improve color purity or color reproducibility within the aforementioned range. Furthermore, since light emitted through quantum dots travels in all directions, optical viewing angles can be improved.

[0103] Furthermore, quantum dots are not limited to a specific shape. Specifically, quantum dots can have a variety of shapes, such as spherical shapes, pyramidal shapes, multi-armed shapes, cubic nanoparticles, nanotubes, nanowires, nanofabric, and nanoplate particles.

[0104] The color of light emitted from quantum dots can vary depending on the particle size. Therefore, quantum dots can have a variety of emitted colors, such as blue, red, or green.

[0105] In an exemplary embodiment, the light-emitting layer may emit a first light. For example, when the display panel DP is an organic electroluminescent display panel, the light-emitting layer may include an organic material that emits blue light and may include a fluorescent or phosphorescent material. However, the exemplary embodiment is not limited thereto or is not limited thereto.

[0106] For example, the organic layer OL can be provided as a common layer for adjacent light-emitting elements EE. When the first electrode EL1 is patterned to form patterned electrodes spaced apart from each other on the circuit layer CL, each of the hole transport region, the light-emitting layer, and the electron transport region can be configured to extend throughout the entire light-emitting element EE without being patterned.

[0107] However, the exemplary embodiments are not limited thereto or by this limitation, and the hole transport region, the light-emitting layer, and the electron transport region may be formed in each light-emitting element EE after the light-emitting element EE is patterned.

[0108] The thin-film encapsulation layer TFE can be disposed on the second electrode EL2. The thin-film encapsulation layer TFE can cover the light-emitting element EE. The thin-film encapsulation layer TFE can be directly disposed on the second electrode EL2. When the light-emitting element EE also includes a capping layer, the thin-film encapsulation layer TFE can be directly disposed on the capping layer.

[0109] In an exemplary embodiment, the thin-film encapsulation layer TFE may include two inorganic layers and an organic layer disposed between the two inorganic layers. Alternatively, the thin-film encapsulation layer TFE may include multiple inorganic layers and multiple organic layers stacked alternately on top of each other. In the thin-film encapsulation layer TFE, the multiple inorganic layers can protect the light-emitting element EE from moisture and oxygen, and the multiple organic layers can protect the light-emitting element EE from foreign matter such as dust particles.

[0110] The first substrate 100 may further include a buffer layer BFL. The buffer layer BFL may be disposed on the thin film encapsulation layer TFE. The buffer layer BFL can protect the first substrate 100 from external impacts and foreign objects.

[0111] The second substrate 200 may be disposed on the first substrate 100. The second substrate 200 may include a first color filter CF1, an optical control layer WCL, a second color filter CF2, a functional layer FNL, and a second base substrate BS2. The first color filter CF1, the optical control layer WCL, the second color filter CF2, the functional layer FNL, and the second base substrate BS2 may be sequentially stacked on a third-direction DR3. However, the configuration of the second substrate 200 is not limited to this or is not restricted by it.

[0112] The second base substrate BS2 may include a base surface on which various components are disposed during the manufacturing process of the second substrate 200. The functional layer FNL protects the second substrate 200 from external impacts or foreign objects. For example, the functional layer FNL may have the same function as the buffer layer BFL.

[0113] The second substrate 200 may further include multiple capping layers CPL. A first capping layer CPL1 may be disposed on a plurality of first color filters CF1 and the first substrate 100. A second capping layer CPL2 may surround an optical control layer WCL. Specifically, the second capping layer CPL2 may surround each of the first optical control portion WCL1, the second optical control portion WCL2, and the third optical control portion WCL3.

[0114] The capping layer CPL prevents moisture and / or oxygen (hereinafter referred to as "moisture / oxygen") from entering the display panel DP. The capping layer CPL can be disposed on the first color filter CF1 and can be configured to cover the entire surface of the light control layer WCL, thereby preventing the light control layer WCL and the first color filter CF1 from being exposed to moisture / oxygen.

[0115] The capping layer CPL may include at least one inorganic layer. For example, the capping layer CPL may include inorganic materials. For example, the capping layer CPL may include silicon nitride, aluminum nitride, zirconium nitride, titanium nitride, hafnium nitride, tantalum nitride, silicon oxide, aluminum oxide, titanium oxide, tin oxide, cerium oxide, and silicon oxynitride, or a thin metal layer with light-transmitting properties. For example, the capping layer CPL may also include an organic layer. The capping layer CPL may have a single-layer or multi-layer structure.

[0116] In an exemplary embodiment, a first color filter CF1 may be disposed on a first substrate 100. Specifically, the first color filter CF1 may include a first blue color filter CF1-1, a second blue color filter CF1-2, and a third blue color filter CF1-3. In an exemplary embodiment, the first blue color filter CF1-1, the second blue color filter CF1-2, and the third blue color filter CF1-3 may be disposed spaced apart from each other in a first direction DR1.

[0117] When the first blue filter CF1-1, the second blue filter CF1-2, and the third blue filter CF1-3 are spaced apart from each other, a first separating pattern BM1 can be provided between them. The first separating pattern BM1 can prevent light emitted from the first filter CF1 or light scattered by the light control portions WCL1, WCL2, and WCL3 from entering the adjacent light control portions WCL1, WCL2, and WCL3. When light emitted from the first filter CF1 or light scattered by the light control portions WCL1, WCL2, and WCL3 enters the adjacent light control portions WCL1, WCL2, and WCL3, the light may affect color purity. A display panel DP according to an exemplary embodiment may include the first separating pattern BM1, and therefore, the color purity of the light can be improved. For example, when the first light is blue light, the first separating pattern BM1 can be a yellow filter. In this case, the first dividing pattern BM1 may comprise the same material as the second color filter CF2 described below, and may have a shape integral with the second color filter CF2. However, the exemplary embodiments are not limited thereto or thereby restricted.

[0118] exist Figure 5 In the display panel DP-1 shown, the second substrate 200-1 according to an exemplary embodiment may include a first partition pattern BM1-1. The first partition pattern BM1-1 may include a black colorant. The first partition pattern BM1-1 may include a material different from the material of the second color filter CF2, and may have a shape separate from the second color filter CF2. The black colorant may include a black dye or a black pigment. The black colorant may include a metallic material such as chromium or its oxide, or may include carbon black.

[0119] According to another exemplary embodiment, the first blue filter CF1-1, the second blue filter CF1-2, and the third blue filter CF1-3 can be entirely disposed on the first substrate 100 without being separated from each other. For example, the second blue filter CF1-2 can extend from the first blue filter CF1-1, and the third blue filter CF1-3 can extend from the second blue filter CF1-2. For example, the first blue filter CF1-1, the second blue filter CF1-2, and the third blue filter CF1-3 can have an integrally formed monolayer shape.

[0120] According to an exemplary embodiment, the first electrode EL1 of each of the light-emitting elements EE in the display panel DP can overlap with each of the first blue filter CF1-1, the second blue filter CF1-2, and the third blue filter CF1-3 in a plan view. Specifically, the area of ​​each of the first blue filter CF1-1, the second blue filter CF1-2, and the third blue filter CF1-3 can be larger than the area of ​​the first electrode EL1 of each of the light-emitting elements EE. Therefore, all light emitted from the first substrate 100 can pass through the first blue filter CF1-1, the second blue filter CF1-2, and the third blue filter CF1-3.

[0121] The first color filter CF1 can transmit light with a specific wavelength range. Specifically, the first color filter CF1 can transmit only the first light emitted from the light-emitting element EE. For example, the first light can be blue light, and the first color filter CF1 can include a blue colorant. The blue colorant can include a blue pigment or a blue dye. In an exemplary embodiment, the first color filter CF1 can transmit the blue light emitted from the light-emitting element EE, can absorb light other than blue light, and can improve the purity of the blue light. Furthermore, when the blue light emitted from the light-emitting element EE passes through the first color filter CF1, the bandwidth of the emission wavelength can be narrowed. For example, the first color filter CF1 can generate blue light with high color purity. The blue light with high color purity can be incident on the first light control section WCL1, the second light control section WCL2, and the third light control section WCL3, and can be converted into blue, green, and red light by the first light control section WCL1, the second light control section WCL2, and the third light control section WCL3 to display clear colors, thereby improving the color reproduction of the display panel DP.

[0122] A light control layer (WCL) can be disposed on the first color filter (CF1). The light control layer (WCL) can control the wavelength of the first light emitted from the light-emitting element (EE). The light control layer (WCL) may include a first light control portion (WCL1), a second light control portion (WCL2), and a third light control portion (WCL3). The first light control portion (WCL1), the second light control portion (WCL2), and the third light control portion (WCL3) can be disposed on the first color filter (CF1). Therefore, the first light emitted from the light-emitting element (EE) can pass through the first color filter (CF1) and then enter the first light control portion (WCL1), the second light control portion (WCL2), and the third light control portion (WCL3).

[0123] In the following text, the first light, the second light, and the third light will be referred to as blue light, green light, and red light, respectively. Red light may have a center wavelength equal to or greater than about 600 nm and equal to or less than about 670 nm, green light may have a center wavelength equal to or greater than about 500 nm and equal to or less than about 580 nm, and blue light may have a center wavelength equal to or greater than about 420 nm and equal to or less than about 480 nm.

[0124] The first light control portion WCL1 may include a base resin and scattering particles. The scattering particles may be distributed in the base resin. The first light control portion WCL1 does not include quantum dots, and therefore, the first light control portion WCL1 can transmit blue light emitted from the light-emitting element EE. Since the first light control portion WCL1 does not include quantum dots, the amount of scattering particles per unit area included in the first light control portion WCL1 can be greater than the amount of scattering particles per unit area included in each of the second light control portions WCL2 and the third light control portion WCL3. The scattering particles may be TiO2 or silicon dioxide-based nanoparticles. However, exemplary embodiments are not limited to this or not limited thereto. The scattering particles can scatter light. Therefore, the optical viewing angle of the display panel DP can be improved. The description relating to the scattering particles included in the first light control portion WCL1 can be applied to the scattering particles included in the second light control portions WCL2 and the third light control portion WCL3, and therefore, for ease of description, details of the scattering particles included in the second light control portions WCL2 and the third light control portion WCL3 will be omitted below.

[0125] The second light control section WCL2 may include a first quantum dot, a base resin, and scattering particles. The first quantum dot and scattering particles may be distributed within the base resin. The first quantum dot may absorb blue light and emit green light. The first quantum dot may have the same function as the quantum dots included in the light-emitting layer described above, and therefore, for ease of description, its details will be omitted.

[0126] The third light control section WCL3 may include a second quantum dot, a base resin, and scattering particles. The second quantum dot and scattering particles may be distributed within the base resin. The second quantum dot may absorb blue light and emit red light. The second quantum dot may have the same function as the quantum dots included in the light-emitting layer described above, and therefore, for ease of description, its details will be omitted.

[0127] In an exemplary embodiment, at least a portion of the second color filter CF2 may be disposed on the light control layer WCL. The second color filter CF2 may overlap with the second light control portion WCL2 and the third light control portion WCL3. The second color filter CF2 may not overlap with the first light control portion WCL1. Specifically, the second color filter CF2 may expose the upper surface TS of the first light control portion WCL1. Furthermore, according to an exemplary embodiment, the second color filter CF2 may be disposed between the first light control portion WCL1, the second light control portion WCL2, and the third light control portion WCL3. However, the exemplary embodiment is not limited thereto or is not restricted by this.

[0128] In an exemplary embodiment, the second color filter CF2 may include a yellow material. The second color filter CF2 can absorb blue light having a color complementary to yellow and can block the transmission of blue light. In an exemplary embodiment, the second color filter CF2 may have no polarization characteristics or very small polarization characteristics relative to red and green light, and may have polarization characteristics relative to blue light. When the second color filter CF2 exposes the upper surface TS of the first light control portion WCL1, blue light passing through the first light control portion WCL1 can be emitted outside the display panel DP without being absorbed by the second color filter CF2.

[0129] When the second color filter CF2 is disposed on the second light control section WCL2 and the third light control section WCL3, the blue light included in the light emitted from the second light control section WCL2 and the third light control section WCL3 can be polarized and can be prevented from being emitted outside the display panel DP. The polarized blue light can be blue light that has not been converted into green and red light in the second light control section WCL2 and the third light control section WCL3.

[0130] When light emitted from the second light control section WCL2 and the third light control section WCL3 respectively passes through the second color filter CF2, light in the blue wavelength range can be removed, and color purity can be improved. For example, the color purity of green light can be improved in the light emitted from the second light control section WCL2, and the color purity of red light can be improved in the light emitted from the third light control section WCL3.

[0131] Since the display panel DP according to the exemplary embodiment may include a first color filter CF1 and a second color filter CF2, each comprising materials having a complementary color relationship, external light incident on the display panel DP can be absorbed by one of the first color filter CF1 and the second color filter CF2 while passing sequentially through the second color filter CF2 and the first color filter CF1. For example, the reflectivity of the display panel DP to external light can be reduced by passing through the first color filter CF1 and the second color filter CF2.

[0132] Reference Figure 6 In the display panel DP-2 according to an exemplary embodiment, the second substrate 200-2 may include a second partition pattern BM2 and a third partition pattern BM3. The second partition pattern BM2 and the third partition pattern BM3 may be disposed above the light control layer WCL (i.e., at a level higher than the level of the light control layer WCL). The second partition pattern BM2 and the third partition pattern BM3 may be configured not to overlap with the first light control portion WCL1, the second light control portion WCL2, and the third light control portion WCL3. For example, the second partition pattern BM2 and the third partition pattern BM3 may be disposed in the non-light-emitting region NPXA.

[0133] In an exemplary embodiment, the second dividing pattern BM2 may include a black colorant, and the description of the black colorant of the first dividing pattern BM1-1 can be equally applied to the black colorant of the second dividing pattern BM2.

[0134] In an exemplary embodiment, the third dividing pattern BM3 may include a blue colorant, such as a blue pigment or a blue dye.

[0135] For example, the second color filter CF2-11 can be disposed between the first light control section WCL1, the second light control section WCL2, and the third light control section WCL3, and can also be disposed on the second light control section WCL2 and the third light control section WCL3. The second color filter CF2-11 disposed between the first light control section WCL1, the second light control section WCL2, and the third light control section WCL3 can prevent light scattered by the first light control section WCL1, the second light control section WCL2, and the third light control section WCL3 from incident on adjacent light control sections WCL1, WCL2, and WCL3, and can also prevent the colors of the light from mixing with each other.

[0136] The second color filter CF2-11, installed on the second light control section WCL2 and the third light control section WCL3, can absorb the blue light emitted from the second light control section WCL2 and the third light control section WCL3 respectively and not be converted, and can improve the purity of green and red.

[0137] When the second color filter CF2-11 exposes the upper surface TS of the first light control section WCL1, the blue light passing through the first light control section WCL1 can be emitted to the outside of the display panel DP.

[0138] Figure 6 A first separating pattern BM1-1 comprising a black colorant is shown. However, the first separating pattern BM1-1 is not limited thereto or by this limitation. The first separating pattern BM1-1 may comprise the same colorant as the second color filter CF2-11. (See reference...) Figure 4 The details described can also be applied to Figure 6 Other components shown.

[0139] Reference Figure 7 In the second substrate 200-3 of the display panel DP-3 according to an exemplary embodiment, a first separating pattern BM1-1 may be disposed between the first color filters CF1. A fourth separating pattern BM4 may be disposed between the first light control portion WCL1, the second light control portion WCL2, and the third light control portion WCL3. The fourth separating pattern BM4 may include a black colorant, and the description of the black colorant of the first separating pattern BM1-1 may be equally applied to the black colorant of the fourth separating pattern BM4. The first separating pattern BM1-1 and the fourth separating pattern BM4 may include the same colorant and may have an integral shape. In the display panel DP-3 according to an exemplary embodiment, when the first separating pattern BM1-1 and the fourth separating pattern BM4 are present, the second color filter CF2-22 may be disposed only on the second light control portion WCL2 and the third light control portion WCL3. Optionally, the second color filter CF2-22 may be disposed on the fourth separating pattern BM4, the second light control portion WCL2, and the third light control portion WCL3. (Refer to...) Figure 4 The details described can also be applied to Figure 7 Other components shown.

[0140] Reference Figure 8 In the second substrate 200-4 of the display panel DP-4 according to an exemplary embodiment, a first color filter CF1-11 may be disposed on the entire first substrate 100. For example, a first blue color filter CF1-1, a second blue color filter CF1-2, and a third blue color filter CF1-3 may be connected to each other to have an integral shape. (Refer to...) Figure 4 The details described can also be applied to Figure 8 Other components shown.

[0141] Reference Figure 9 The second substrate 200-5 of the display panel DP-5 according to the exemplary embodiment may further include a barrier wall BK. The barrier wall BK may be disposed on the first color filter CF1-11 and may be configured to overlap with the non-light-emitting region NPXA. The second color filter CF2-33 may be disposed on the barrier wall BK.

[0142] In an exemplary embodiment, the barrier wall BK may include a first barrier wall BK1, a second barrier wall BK2, and a third barrier wall BK3. The first barrier wall BK1, the second barrier wall BK2, and the third barrier wall BK3 may be sequentially stacked on the first color filter CF1-11 on the third-direction DR3.

[0143] In an exemplary embodiment, the first barrier wall BK1 may comprise the same material as the second color filter CF2-33. The second barrier wall BK2 may be an inorganic layer comprising an inorganic material. Specifically, the second barrier wall BK2 may comprise silicon nitride (SiN). x ) or silicon oxide (SiO) x For example, the second barrier wall BK2 may include silicon oxide (SiO2). x The third barrier wall BK3 may include an organic layer. At least a portion of the second barrier wall BK2 may be inserted into each of the first light control portion WCL1, the second light control portion WCL2, and the third light control portion WCL3. However, exemplary embodiments are not limited thereto or thereby restrictive.

[0144] The barrier wall BK prevents the colors of light emitted from the first light control section WCL1, the second light control section WCL2, and the third light control section WCL3 from mixing with each other, and can improve the purity of light. For example, it can improve the color reproduction of the display panel DP-5.

[0145] Refer again Figure 4 In an exemplary embodiment, the display panel DP may include a first base substrate BS1, a circuit layer CL, a plurality of light-emitting elements EE, a thin film encapsulation layer TFE, a buffer layer BFL, a first color filter CF1, a light control layer WCL, a second color filter CF2, a functional layer FNL, and a second base substrate BS2, which are stacked on top of each other sequentially through a series of processes.

[0146] According to another exemplary embodiment, a display panel DP can be manufactured by assembling a first substrate 100 and a second substrate 200 formed separately from each other. Specifically, the first substrate 100 can be formed by sequentially stacking a circuit layer CL, a plurality of light-emitting elements EE, a thin-film encapsulation layer TFE, and a buffer layer BFL on a first base substrate BS1 via a sequential process. The second substrate 200 can be formed by sequentially stacking a functional layer FNL, a second color filter CF2, a light control layer WCL, and a first color filter CF1 on a second base substrate BS2 via a sequential process.

[0147] Figures 10A to 10I Manufacturing process is shown Figure 1A A view of the method of using a second substrate for a display panel. This is based on... Figure 9 The exemplary embodiment shown illustrates a method for manufacturing the second substrate 200-5 (hereinafter also referred to as the second substrate 200 for ease of description). However, the method for manufacturing the second substrate 200 is not limited thereto.

[0148] Figure 10A The process of preparing a first substrate 100 is illustrated. The first substrate 100 may include a synthetic resin substrate or a glass substrate. Figure 10B The diagram illustrates the sequential formation of a first color filter CF1, a second color filter CF2, an inorganic layer IN, and a photoresist PR on a first substrate 100. Specifically, the first color filter CF1 and the second color filter CF2 can be formed using a photolithography process. The inorganic layer IN can be formed by depositing materials such as silicon nitride (SiN). x ) or silicon oxide (SiO) x Inorganic materials are formed. Photoresist (PR) can be deposited using a spin coating method.

[0149] Figure 10C The operation of photoresist PR is illustrated. Specifically, a mask pattern MA is formed, and light is shone onto the photoresist PR. The photoresist PR can be a positive photoresist. However, exemplary embodiments are not limited thereto or thereby restrictive. Photolithography processes such as development and baking processes can be performed after the exposure process.

[0150] Figure 10D The first patterned photoresist PR-1 formed using the mask pattern MA is shown.

[0151] Figure 10E It shows the Figure 10D The inorganic layer IN is dry-etched to form the etched inorganic layer IN-1. The etched inorganic layer IN-1 can overlap with the first patterned photoresist PR-1.

[0152] Figure 10F It shows the Figure 10E The dry ashing operation of the first patterned photoresist PR-1 to form the second patterned photoresist PR-2, and the... Figure 10E The second color filter CF2 undergoes a dry ashing operation to form the patterned color filter CF2-1. In an exemplary embodiment, the first patterned photoresist PR-1 and the second color filter CF2 can be ashing substantially simultaneously. For example, the second patterned photoresist PR-2 and the patterned color filter CF2-1 can be formed substantially simultaneously.

[0153] The barrier wall BK described above may include a patterned color filter CF2-1, an etched inorganic layer IN-1, and a second patterned photoresist PR-2 sequentially stacked on a third-direction DR3. Specifically, the patterned color filter CF2-1 may be substantially identical to the first barrier wall BK1. The description relating to the first barrier wall BK1 can be equally applied to the patterned color filter CF2-1. The etched inorganic layer IN-1 may be substantially identical to the second barrier wall BK2 described above. The description relating to the second barrier wall BK2 can be equally applied to the etched inorganic layer IN-1.

[0154] The second patterned photoresist PR-2 is essentially the same as the third barrier wall BK3 described above. The description relating to the third barrier wall BK3 can be applied equivalently to the second patterned photoresist PR-2. Furthermore, adjustments can be made to... Figure 10B The height of the deposited photoresist PR is used to adjust the height of the third barrier wall BK3 in the operation shown (i.e., Figure 9 The height of the barrier wall BK can be controlled (HH in the middle).

[0155] Figure 10G The operation of jetting a first component material CM1, a second component material CM2, and a third component material CM3 between barrier walls BK via a nozzle NZ using an inkjet printing method is illustrated. The first component material CM1 may include a first quantum dot, a base resin, scattering particles, and a solvent. In an exemplary embodiment, the first quantum dot may absorb blue light and emit green light. The second component material CM2 may include a second quantum dot, a base resin, scattering particles, and a solvent. In an exemplary embodiment, the second quantum dot may absorb blue light and emit red light. The third component material CM3 may include a base resin, scattering particles, and a solvent.

[0156] Referring to region AA, the two ends of the etched inorganic layer IN-1 can be covered by the first constituent material CM1, the second constituent material CM2, and the third constituent material CM3. This structure can be formed according to the manufacturing sequence of the second substrate 200.

[0157] Figure 10H It shows the Figure 10G The process involves baking the first component material CM1, the second component material CM2, and the third component material CM3. Solvent can be removed from each of the three components via the baking process. In an exemplary embodiment, when solvent is removed from the first component material CM1, the second light control portion WCL2 described above can be formed. In an exemplary embodiment, when solvent is removed from the second component material CM2, the third light control portion WCL3 described above can be formed. When solvent is removed from the third component material CM3, the first light control portion WCL1 described above can be formed. The arrangement order of the first light control portion WCL1, the second light control portion WCL2, and the third light control portion WCL3 is not limited to this or is not restricted by it.

[0158] like Figure 10G As shown, at least a portion of the etched inorganic layer IN-1 can be inserted into the first light control portion WCL1, the second light control portion WCL2, and the third light control portion WCL3 in region AA.

[0159] Figure 10IThis illustrates the formation of a second color filter CF2 on the barrier wall BK (which corresponds to...). Figure 9 The second color filter CF2-33, the functional layer FNL, and the second base substrate BS2 shown are used to form the second substrate 200. The second color filter CF2 may expose the first light control portion WCL1. The functional layer FNL may be disposed on the second color filter CF2 and the first light control portion WCL1 to provide a flat surface on the glass substrate. In an exemplary embodiment, the functional layer FNL may include an organic material.

[0160] A second base substrate BS2 can be disposed on the functional layer FNL. In an exemplary embodiment, a first color filter CF1 (which corresponds to) can be stacked on the first substrate 100. Figure 9 The first color filter CF1-11), the second base substrate BS2, and the components between the first color filter CF1 and the second base substrate BS2 are shown to form the second substrate 200.

[0161] Figure 11 This is a graph showing the transmittance (%) of the second color filter CF2 of the display panel DP according to an exemplary embodiment, as a function of wavelength. Figure 12 It is a graph showing the normalized radiance of the emission spectrum of light generated by the display panel DP according to an exemplary embodiment, after the light passes through the second light control section WCL2. Figure 13 It shows Figure 12 The graph shows the emission spectrum of light after it passes through the second color filter CF2. Figure 14 It is a graph showing the emission spectrum of light generated by the display panel DP according to an exemplary embodiment, after the light passes through the third light control section WCL3. Figure 15 It shows Figure 14 The graph shows the emission spectrum of light after it passes through the second color filter CF2.

[0162] Reference Figure 11The second color filter CF2 has a much lower transmittance for blue light than for green and red light. Specifically, the second color filter CF2 has approximately zero (0) transmittance for light with a center wavelength equal to or greater than about 420 nm and equal to or less than about 480 nm. The second color filter CF2 has an transmittance equal to or greater than about 80% for light with a center wavelength equal to or greater than about 500 nm and equal to or less than about 580 nm, and for light with a center wavelength equal to or greater than about 600 nm and equal to or less than about 670 nm. In an exemplary embodiment, light with a center wavelength equal to or greater than about 420 nm and equal to or less than about 480 nm can be blocked by the second color filter CF2. For example, light with a center wavelength equal to or greater than about 420 nm and equal to or less than about 480 nm emitted from the display panel DP may not pass through the second color filter CF2.

[0163] Reference Figure 12 and Figure 13 The light passing through the second light control section WCL2 can include green light with a center wavelength around 540 nm and blue light with a center wavelength around 460 nm. The green light can be obtained by converting the blue light using a first quantum dot included in the second light control section WCL2. The blue light can be unconverted light provided from the first color filter CF1. Figure 12 When light passes through the second color filter CF2, light with a center wavelength equal to or greater than about 420 nm and equal to or less than about 480 nm can be removed. For example, the second color filter CF2 can remove blue light from light passing through the second light control section WCL2, and thus can improve the purity of green light.

[0164] Reference Figure 14 and Figure 15 The light passing through the third light control section WCL3 can include red light with a center wavelength around 630 nm and blue light with a center wavelength around 450 nm. The red light can be obtained by converting the blue light using a second quantum dot included in the third light control section WCL3. The blue light can be unconverted light provided by the first color filter CF1. Figure 14 When light passes through the second color filter CF2, light with a center wavelength equal to or greater than about 420 nm and equal to or less than about 480 nm can be removed. For example, the second color filter CF2 can remove blue light from light passing through the third light control section WCL3, and thus can improve the purity of red light.

[0165] The display panel DP may include a first color filter CF1, a light control layer WCL, and a second color filter CF2 stacked sequentially on top of each other, wherein the second color filter CF2 has a color that is complementary to the color of the first color filter CF1. Therefore, the color purity of the light emitted from the light control layer WCL can be improved, and the reflectivity of external light can also be reduced.

[0166] Figure 16A It is along Figure 3 The section view of the display panel DP-6, taken by line I-I', is shown, and Figure 16B yes Figure 16A The cross-sectional view of the light-emitting element EE1-1 shown.

[0167] In the following text, refer to Figures 1 to 12. Figure 9 The description can be applied to the figures 1 to 12. Figure 9 The components shown are the same as those in the diagram. Furthermore, the capping layer CPL (see reference) is omitted. Figures 4 to 9 However, a capping layer can be added as needed.

[0168] Reference Figure 16A and Figure 16B The light-emitting element EE1-1 may include a first electrode EL1, an organic layer OL1-1, and a second electrode EL2. The organic layer OL1-1 may include a first stacked portion ST1 and a second stacked portion ST2 disposed above the first electrode EL1. A first charge generation layer CGL1 may be disposed between the first stacked portion ST1 and the second stacked portion ST2.

[0169] The first stacked portion ST1 may include a first light-emitting layer EML1 that emits light, a first hole transport region HTR1 that transports holes provided by the first electrode EL1 to the first light-emitting layer EML1, and a first electron transport region ETR1 that transports electrons provided by the first charge generation layer CGL1 to the first light-emitting layer EML1.

[0170] With reference Figures 4 to 9 The description relating to the light-emitting layer can be equally applied to the first light-emitting layer EML1. For example, the first light-emitting layer EML1 can emit first light.

[0171] Figure 16B The diagram illustrates a structure where the first hole transport region HTR1 includes a first hole injection layer HIL1 and a first hole transport layer HTL1. However, exemplary embodiments are not limited thereto or by this limitation, and one of the first hole injection layer HIL1 and the first hole transport layer HTL1 may be omitted. In an exemplary embodiment, the first hole transport region HTR1 may include only the first hole injection layer HIL1, and the first hole injection layer HIL1 may be in contact with the first light-emitting layer EML1.

[0172] Figure 16B The diagram illustrates a structure where the first electron transport region ETR1 includes a first electron injection layer EIL1 and a first electron transport layer ETL1. However, exemplary embodiments are not limited thereto or by this limitation, and one of the first electron injection layer EIL1 and the first electron transport layer ETL1 may be omitted. In an exemplary embodiment, the first electron transport region ETR1 may include only the first electron transport layer ETL1, and the first electron transport layer ETL1 may be in contact with the first light-emitting layer EML1 and the first charge-generating layer CGL1.

[0173] The second stacked portion ST2 may include a second light-emitting layer EML2 that emits light, a second hole transport region HTR2 that transports holes provided by the first charge generation layer CGL1 to the second light-emitting layer EML2, and a second electron transport region ETR2 that transports electrons generated by the second electrode EL2 to the second light-emitting layer EML2.

[0174] The second emitting layer EML2 can emit a second light. The description associated with the first emitting layer EML1 can be applied equally to the second emitting layer EML2.

[0175] The description relating to the first hole transport region HTR1 can be applied equally to the second hole transport region HTR2. Similarly, the description relating to the first electron transport region ETR1 can be applied equally to the second electron transport region ETR2.

[0176] Each layer of the first hole transport region HTR1 and the second hole transport region HTR2 can be formed using conventional methods known in the art. For example, the first hole transport region HTR1 and the second hole transport region HTR2 can be formed using various methods such as vacuum deposition, spin coating, casting, Langmuir-Blodgett (LB) method, inkjet printing, laser printing, laser-induced thermal imaging (LITI) method, etc.

[0177] Each layer of the first electron transport region ETR1 and the second electron transport region ETR2 can be formed using conventional methods known in the art. For example, the first electron transport region ETR1 and the second electron transport region ETR2 can be formed using a variety of methods such as vacuum deposition, spin coating, casting, Langmuir-Blodgett (LB) method, inkjet printing, laser printing, laser-induced thermal imaging (LITI) method, etc.

[0178] A first charge generation layer CGL1 can be disposed between a first stack ST1 and a second stack ST2. When a voltage is applied, the first charge generation layer CGL1 can form a complex via a redox reaction, and thus generate charges (electrons and holes). Furthermore, the first charge generation layer CGL1 can provide the generated charges to each of its adjacent stacks ST1 and ST2. The first charge generation layer CGL1 can double the efficiency of the current generated in the stacks ST1 and ST2, and can adjust the charge balance between the first stack ST1 and the second stack ST2.

[0179] The first charge generation layer CGL1 may have a layer structure in which a first sub-charge generation layer CGL1-1 and a second sub-charge generation layer CGL1-2 are attached to each other. As an example, the first sub-charge generation layer CGL1-1 may be an n-type charge generation layer, configured to be adjacent to the first stack ST1 and provide electrons to the first stack ST1. The second sub-charge generation layer CGL1-2 may be a p-type charge generation layer, configured to be adjacent to the second stack ST2 and provide holes to the second stack ST2. A buffer layer may be further disposed between the first sub-charge generation layer CGL1-1 and the second sub-charge generation layer CGL1-2.

[0180] The first light-emitting layer EML1 and the second light-emitting layer EML2 can emit light within a variety of wavelength ranges. In an exemplary embodiment, the first light-emitting layer EML1 can emit first light, and the second light-emitting layer EML2 can emit second light. The light-emitting element EE1-1 according to the exemplary embodiment can have a stacked structure in which the first light-emitting layer EML1 and the second light-emitting layer EML2 are stacked on top of each other, and can emit light obtained by mixing the first light and the second light as a light source.

[0181] Refer again Figure 16A The display panel DP-6 can emit a first light and a second light using the light-emitting element EE1-1. Hereinafter, the light obtained by mixing the first light and the second light will be referred to as the "first mixed light". In an exemplary embodiment, the first light can be blue light. The first light can have a center wavelength equal to or greater than about 420 nm and equal to or less than about 480 nm.

[0182] In an exemplary embodiment, the second light may be green light. The second light may have a center wavelength equal to or greater than about 500 nm and equal to or less than about 580 nm.

[0183] The first mixed light may have a center wavelength equal to or greater than about 420 nm and equal to or less than about 480 nm, and a center wavelength equal to or greater than about 500 nm and equal to or less than about 580 nm. However, exemplary embodiments are not limited thereto or thereby limited, and the center wavelength of the first mixed light may vary depending on the wavelength range of the first light and the second light.

[0184] The first mixed light can be emitted from the first substrate 100-1 and can be incident on the second substrate 200-6. A portion of the first mixed light incident on the second substrate 200-6 can be incident on the second light control section WCL2, can pass through the second color filter CF2, and can be emitted to the outside of the display panel DP-6.

[0185] In the second substrate 200-6 according to an exemplary embodiment, the first opening OP1 may be defined to pass through the second blue filter CF1-2'. The first opening OP1 may penetrate the second blue filter CF1-2'. The first opening OP1 may be applied without particular limitations, as long as the first opening OP1 is defined at a position overlapping with the second light control portion WCL2.

[0186] The second light control section WCL2 and the second color filter CF2 can be sequentially stacked on the second blue color filter CF1-2'. As described above, the second light control section WCL2 can use quantum dots to convert the wavelength of the incident light into the wavelength range of green light. The second color filter CF2 can have... Figure 11 The transmittance is shown according to wavelength. For example, the transmittance of the second color filter CF2 relative to blue light can be significantly less than the transmittance of the second color filter CF2 relative to green and red light.

[0187] Depending on the position where the first mixed light is incident on the second substrate 200-6, the first mixed light can pass through the second light control section WCL2 and the second color filter CF2 after passing through the second blue color filter CF1-2'. Alternatively, the first mixed light can pass through the second light control section WCL2 and the second color filter CF2 after passing through the first opening OP1.

[0188] Figure 16A A display panel DP-6 according to an exemplary embodiment is shown; however, the structure of the display panel DP-6 can be changed in various ways, as long as the first opening OP1 is defined. For example, as Figures 4 to 9 The shapes of the first color filters CF1-11, the first dividing patterns BM1 to the fourth dividing patterns BM4, and the barrier wall BK shown in the display panels DP to DP-5 can be applied to Figure 16A The display panel shown is DP-6.

[0189] Figures 17A to 17D It shows the result of Figure 16A A graph of the spectrum of the first mixed light generated by the display panel.

[0190] In the following text, refer to Figures 17A to 17D Describe the changes in the spectrum of the first mixed light as it sequentially passes through the second blue filter CF1-2', the second light control section WCL2, and the second filter CF2.

[0191] Figure 17A The spectrum of the first mixed light emitted from the first substrate 100-1 according to an exemplary embodiment is shown. Figure 17A As shown, the first mixed light may have a center wavelength equal to or greater than about 420 nm and equal to or less than about 480 nm, and a center wavelength equal to or greater than about 500 nm and equal to or less than about 580 nm.

[0192] Figure 17B The spectrum of the first mixed light emitted from the first substrate 100-1 and passing through the second blue filter CF1-2' is shown. Figure 17B As shown, the first mixed light passing through the second blue filter CF1-2' can have a center wavelength equal to or greater than about 420 nm and equal to or less than about 480 nm. It can pass through the second blue filter CF1-2' from... Figure 17A The first mixed light removes the second light, but can retain the first light. The first light can be blue light.

[0193] Figure 17C The spectrum of the first mixed light sequentially passing through the second blue filter CF1-2' and the second light control section WCL2 is shown. Figure 17C Showing the passage through the second light control section WCL2 Figure 17B The spectrum of light.

[0194] As by Figure 17C As shown in the spectrum, Figure 17C The light can have a center wavelength equal to or greater than about 420 nm and equal to or less than about 480 nm, and a center wavelength equal to or greater than about 500 nm and equal to or less than about 580 nm. For example, Figure 17B The wavelength of the light can be changed as it passes through the second light control section WCL2. Figure 17B A portion of the light can be converted into green light. Figure 17B The rest of the light can remain blue light instead of being converted to green light.

[0195] Figure 17D The spectrum of the first mixed light is shown after it sequentially passes through the second blue filter CF1-2', the second light control section WCL2, and the second filter CF2. Furthermore, in Figure 17DThe transmittance of the second color filter CF2 for each wavelength is shown by dashed lines. The transmittance of the second color filter CF2 relative to blue light is significantly lower than that of the second color filter CF2 relative to green and red light.

[0196] like Figure 17D As shown, based on the transmittance of the second color filter CF2, light can pass through the second color filter CF2 from the source... Figure 17C The spectrum shows the removal of light corresponding to the wavelength range of blue light.

[0197] therefore, Figure 17D The spectrum can correspond to the spectrum of green light with a center wavelength that is equal to or greater than about 500 nm and equal to or less than about 580 nm.

[0198] Reference Figure 17D The first mixed light emitted from the first substrate 100-1 can sequentially pass through the second blue filter CF1-2', the second light control section WCL2, and the second filter CF2, and can thus be converted into a wavelength range with green light.

[0199] Figures 18A to 18D It shows the result of Figure 16A Another example of a display panel is a graph of the spectrum of the first mixed light generated.

[0200] In the following text, refer to Figures 18A to 18D Describe the changes in the spectrum of the first mixed light as it sequentially passes through the first opening OP1, the second light control section WCL2, and the second color filter CF2.

[0201] Figure 18A The spectrum of the first mixed light emitted from the first substrate 100-1 according to an exemplary embodiment is shown. Figure 18A As shown, the first mixed light may have a center wavelength equal to or greater than about 420 nm and equal to or less than about 480 nm, and a center wavelength equal to or greater than about 500 nm and equal to or less than about 580 nm.

[0202] Figure 18B The spectrum of the first mixed light emitted from the first substrate 100-1 and passing through the first opening OP1 is shown. Figure 18B The spectrum shown is Figure 18A The spectra shown are essentially the same. The first mixed light can pass through the first opening OP1 without any change in wavelength. For example, the second light included in the first mixed light can be incident on the second light control section WCL2 without being removed by the second blue color filter CF1-2'.

[0203] Figure 18CThe spectrum of the first mixed light emitted from the first opening OP1 and passing through the second light control section WCL2 is shown. (As shown by...) Figure 18C As shown in the spectrum, the first mixed light may have a center wavelength equal to or greater than about 420 nm and equal to or less than about 480 nm, and a center wavelength equal to or greater than about 500 nm and equal to or less than about 580 nm.

[0204] Due to the quantum dots in the second light control section WCL2, a portion of the blue light incident on the first mixed light can be converted into green light. Therefore, the green light included in the first mixed light (which is the light source) is added to the green light generated by the second light control section WCL2, and thus, the amount of green light generated by the display panel DP-6 can be increased. Figure 18C As shown, with Figure 18B Compared to the spectrum, it can increase the brightness of light in wavelengths equal to or greater than about 500 nm and equal to or less than about 580 nm.

[0205] Figure 18D The spectrum of the first mixed light sequentially passing through the first opening OP1, the second light control section WCL2, and the second color filter CF2 is shown. Furthermore, in Figure 18D The transmittance of the second color filter CF2 for each wavelength is shown by dashed lines. The transmittance of the second color filter CF2 relative to blue light is significantly less than that of the second color filter CF2 relative to green and red light.

[0206] like Figure 18D As shown, based on the transmittance of the second color filter CF2, light corresponding to the wavelength range of blue light can pass through the second color filter CF2 from the wavelength range of blue light. Figure 18C The light removal is shown in the spectrum.

[0207] Reference Figure 17D and Figure 18D , Figure 18D The normalized radiative power of wavelengths equal to or greater than approximately 500 nm and equal to or less than approximately 580 nm can be higher than Figure 17D The normalized radiance of wavelengths equal to or greater than approximately 500 nm and equal to or less than approximately 580 nm.

[0208] The display panel DP-6 according to an exemplary embodiment may include a first opening OP1 defined through a second blue filter CF1-2' to emit green light included in a light source, and may emit green light generated by converting blue light using a second light control portion WCL2, and thus may display an image in which the brightness of the green light is increased.

[0209] Figure 19A It is along Figure 3The section view of the display panel DP-7, taken by line I-I', is shown. Figure 19B yes Figure 19A The cross-sectional view of the light-emitting element EE1-2 shown.

[0210] In the following text, refer to Figures 1 to 12. Figure 18D The given description can be applied equally to Figure 19A and Figure 19B The same as Figure 1 to Figure 18D The same components as those in the text.

[0211] Reference Figure 19A and Figure 19B The light-emitting element EE1-2 may include a first electrode EL1, an organic layer OL1-2, and a second electrode EL2. The organic layer OL1-2 may include a first stacked portion ST1 and a third stacked portion ST3 disposed above the first electrode EL1. A first charge generation layer CGL1 may be disposed between the first stacked portion ST1 and the third stacked portion ST3.

[0212] The third stack ST3 may include a third light-emitting layer EML3 that emits light, a third hole transport region HTR3 that transports holes provided by the first charge generation layer CGL1 to the third light-emitting layer EML3, and a third electron transport region ETR3 that transports electrons generated by the second electrode EL2 to the third light-emitting layer EML3.

[0213] The third light-emitting layer EML3 in the exemplary embodiment can emit third light.

[0214] Figure 19B The diagram illustrates a structure where the third hole transport region HTR3 includes a third hole injection layer HIL3 and a third hole transport layer HTL3, and the third electron transport region ETR3 includes a third electron injection layer EIL3 and a third electron transport layer ETL3. However, the exemplary embodiments are not limited thereto or are not limited thereto. The description of the first light-emitting layer EML1 can be applied equally to the third light-emitting layer EML3. The description of the first hole transport region HTR1 can be applied equally to the third hole transport region HTR3. Furthermore, the description of the first electron transport region ETR1 can be applied equally to the third electron transport region ETR3.

[0215] Refer again Figure 19A The light-emitting element EE1-2 of the display panel DP-7 can emit the first light and the third light as described above. Hereinafter, the light obtained by mixing the first light and the third light can be referred to as the "second mixed light". In an exemplary embodiment, the first light can be blue light. The first light can have a center wavelength equal to or greater than about 420 nm and equal to or less than about 480 nm.

[0216] In an exemplary embodiment, the third light may be red light. The third light may have a center wavelength equal to or greater than about 600 nm and equal to or less than about 670 nm.

[0217] The second mixed light may have a center wavelength equal to or greater than about 420 nm and equal to or less than about 480 nm, and a center wavelength equal to or greater than about 600 nm and equal to or less than about 670 nm. However, exemplary embodiments are not limited thereto or by this limitation, and the center wavelength of the second mixed light may vary depending on the wavelength ranges of the first and third lights.

[0218] The second mixed light can be emitted from the first substrate 100-2 and can be incident on the second substrate 200-7. A portion of the second mixed light incident on the second substrate 200-7 can be incident on the third light control section WCL3, can pass through the second color filter CF2, and can exit to the outside of the display panel DP-7.

[0219] In the second substrate 200-7 according to an exemplary embodiment, the second opening OP2 may be defined to pass through the third blue filter CF1-3'. The second opening OP2 may penetrate the third blue filter CF1-3'. The second opening OP2 may be applied without particular limitations, as long as the second opening OP2 is defined at a position overlapping with the third light control portion WCL3.

[0220] The third light control section WCL3 and the second color filter CF2 can be sequentially stacked on top of the third blue color filter CF1-3'. As described above, the third light control section WCL3 can use quantum dots to convert the wavelength of the incident light into the wavelength range of red light. The second color filter CF2 can have... Figure 11 The transmittance is shown according to wavelength. For example, the transmittance of the second color filter CF2 relative to blue light can be significantly less than the transmittance of the second color filter CF2 relative to green and red light.

[0221] Depending on the position where the second mixed light is incident on the second substrate 200-7, the second mixed light can pass through the third light control section WCL3 and the second color filter CF2 after passing through the third blue color filter CF1-3'. Alternatively, the second mixed light can pass through the third light control section WCL3 and the second color filter CF2 after passing through the second opening OP2.

[0222] The second opening OP2 can be executed and referenced. Figures 17A to 17D and Figures 18A to 18DThe first opening OP1 described has essentially the same function. For example, a display panel DP-7 according to an exemplary embodiment may include a second opening OP2 defined to pass through a third blue color filter CF1-3', and may emit red light included in the light source to the outside of the display panel DP-7. Furthermore, red light generated by converting blue light using a third light control section WCL3 can also be emitted to the outside of the display panel DP-7. Therefore, the display panel DP-7, in which the second opening OP2 is defined, can display an image in which the brightness of the red light is increased by adding the red light included in the light source to the red light generated by the third light control section WCL3.

[0223] While specific exemplary embodiments and implementations have been described herein, other embodiments and modifications will be apparent from that description. Therefore, the inventive concept is not limited to these embodiments, but is limited by the appended claims and various obvious modifications, as well as equivalent arrangements that will be obvious to those skilled in the art.

Claims

1. Display panel, including: A first substrate includes multiple light-emitting elements to emit first light; as well as A second substrate is disposed on the first substrate, and the second substrate includes: The first color filter includes a first blue color filter, a second blue color filter, and a third blue color filter disposed on the first substrate; A light control layer includes a first light control portion, a second light control portion, and a third light control portion, wherein the first light control portion is used to transmit the first light and is disposed on the first blue filter; the second light control portion is used to convert the first light into a second light and is disposed on the second blue filter; and the third light control portion is used to convert the first light into a third light and is disposed on the third blue filter; and A second color filter exposes the upper surface of the first light control portion and covers the second light control portion and the third light control portion, and the second color filter includes a material that absorbs the first light and transmits the second light and the third light.

2. The display panel according to claim 1, wherein, The first blue filter, the second blue filter, and the third blue filter are spaced apart from each other, and the second substrate further includes a first dividing pattern disposed between the first blue filter, the second blue filter, and the third blue filter.

3. The display panel according to claim 2, wherein, The first dividing pattern and the second color filter are made of the same material.

4. The display panel according to claim 2, wherein, The first dividing pattern includes a black colorant.

5. The display panel according to claim 1, further comprising a second separating pattern and a third separating pattern, the second separating pattern and the third separating pattern being disposed above the light control layer and not overlapping with the first light control portion, the second light control portion and the third light control portion, wherein: The second dividing pattern includes a black colorant, and The third dividing pattern is disposed on the second dividing pattern and includes a blue colorant.

6. The display panel according to claim 1, wherein, Each of the plurality of light-emitting elements includes a first electrode, a second electrode, and an organic layer disposed between the first electrode and the second electrode, the organic layer including a first light-emitting layer to generate the first light.

7. The display panel according to claim 6, wherein: The first electrode of each of the plurality of light-emitting elements overlaps with each of the first blue filter, the second blue filter, and the third blue filter, and The area of ​​each of the first blue filter, the second blue filter, and the third blue filter in the plan view is greater than the area of ​​the first electrode in the plan view.

8. The display panel according to claim 6, wherein: The organic layer further includes a second light-emitting layer to emit the second light. The second blue filter has a first opening, the first opening being defined to pass through the second blue filter, and The first opening overlaps with the second light control portion.

9. The display panel according to claim 6, wherein: The organic layer further includes a third light-emitting layer to emit the third light. The third blue filter is provided with a second opening, the second opening being defined to pass through the third blue filter, and The second opening overlaps with the third light control portion.

10. The display panel according to claim 1, wherein: Each of the first blue filter, the second blue filter, and the third blue filter is configured to transmit the first light.

11. The display panel according to claim 1, wherein: The first light is blue light. The second light is green light, and The third light is red light.

12. The display panel according to claim 1, wherein: The second blue filter extends from the first blue filter, and The third blue filter extends from the second blue filter.

13. The display panel according to claim 12, further comprising a barrier wall, the barrier wall not overlapping the first light control portion, the second light control portion and the third light control portion, and disposed between the first color filter and the second color filter, wherein: The barrier wall comprises a first barrier wall, a second barrier wall, and a third barrier wall stacked sequentially. The first barrier wall and the second color filter are made of the same material. The second barrier wall comprises inorganic materials, and The third barrier wall comprises organic materials.

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