Display device

Abstract

A display device is provided. The display device includes a first display substrate and a second display substrate. The first display substrate includes a first substrate body, a first electrode disposed on the first substrate body, a second electrode spaced apart from the first electrode, and a light-emitting element disposed between the first electrode and the second electrode. The second display substrate faces the first display substrate and is configured to receive light emitted from the light-emitting element. The second display substrate includes a second substrate body, a first color filter disposed on a surface of the second substrate body, and a first wavelength conversion pattern disposed on the first color filter. The first wavelength conversion pattern includes a first surface facing the first display substrate and a second surface facing away from the first surface and facing the first color filter. The first surface includes a curved surface portion that is recessed toward the second surface.

Description

[0001] This application claims the priority and benefit of Korean Patent Application No. 10-2019-0113123, filed on Sep. 11, 2019, which is incorporated herein by reference in its entirety for all purposes as if fully set forth herein. Technical Field

[0002] Exemplary embodiments generally relate to a display device. Background Art

[0003] With the development of multimedia, the importance of display devices has increased. Accordingly, various types of display devices, such as liquid crystal display (LCD) devices, organic light emitting diode (OLED) display devices, and inorganic light emitting diode display devices, have been developed.

[0004] Among display devices, inorganic light emitting display devices include inorganic light emitting elements as self-light (or self-emitting) elements. The inorganic light emitting elements are generally disposed between two electrodes facing each other and receive electrical signals from each electrode to emit light of a specific wavelength band through an active layer. In addition, among display devices, organic light emitting display devices include organic light emitting elements as self-emitting elements. The organic light emitting elements generally include two electrodes facing each other and an organic light emitting layer disposed between the two electrodes. Electrons and holes provided from the two electrodes are recombined in the organic light emitting layer to generate excitons, and the generated excitons are transitioned from an excited state to a lower state (e.g., a ground state) to emit light.

[0005] Accordingly, self-emitting display devices do not require an additional light source, have low power consumption, and can be made thin and light in weight. In addition, self-emitting display devices generally have high-quality characteristics such as a wide viewing angle, high brightness and contrast, and a fast response time. Accordingly, self-emitting display devices have attracted considerable attention as next-generation display devices.

[0006] The above information disclosed in this section is only for understanding the background art of the inventive concept and thus may include information that does not form the prior art. Summary of the Invention

[0007] Some aspects can provide a display device including a light transmissive pattern and a wavelength conversion pattern, both having a curved surface.

[0008] Additional aspects will be set forth in the following detailed description and will be apparent from the disclosure, or may be learned by practice of the inventive concept.

[0009] According to some aspects, a display device includes a first display substrate and a second display substrate. The first display substrate includes a first substrate, a first electrode disposed on the first substrate, a second electrode spaced apart from the first electrode, and a light-emitting element disposed between the first electrode and the second electrode. The second display substrate faces the first display substrate and is configured to receive light emitted from the light-emitting element. The second display substrate includes a second substrate, a first color filter disposed on a surface of the second substrate, and a first wavelength conversion pattern disposed on the first color filter. The first wavelength conversion pattern includes a first surface facing the first display substrate and a second surface facing away from the first surface and facing the first color filter. The first surface includes a curved surface portion that is recessed toward the second surface.

[0010] According to some aspects, a display device includes a first display substrate and a second display substrate. The first display substrate includes a first light-emitting region, a second light-emitting region spaced apart from the first light-emitting region in a first direction, and a non-light-emitting region disposed between the first light-emitting region and the second light-emitting region. The second display substrate is disposed on the first display substrate. The second display substrate includes a first light-transmissive region, a second light-transmissive region spaced apart from the first light-transmissive region in the first direction, and a non-light-transmissive region disposed between the first light-transmissive region and the second light-transmissive region. The first display substrate further includes a first light-emitting element disposed in the first light-emitting region and a second light-emitting element disposed in the second light-emitting region. The second display substrate further includes a first color filter disposed in the first light-transmissive region, a light-transmissive pattern disposed on the first color filter, a second color filter disposed in the second light-transmissive region, and a first wavelength conversion pattern disposed on the second color filter. Each of the light-transmissive pattern and the first wavelength conversion pattern includes a first surface facing the first display substrate and a second surface facing away from the first surface. The first surface includes a curved surface portion that is recessed toward the second surface.

[0011] The foregoing general description and the following detailed description are exemplary and explanatory and are intended to provide further explanation of the claimed subject matter. Description of the Drawings

[0012] The drawings illustrate exemplary embodiments of the inventive concept and, together with the description, are used to explain the principles of the inventive concept. The drawings are included to provide a further understanding of the inventive concept and are incorporated into and constitute a part of this specification. In the drawings:

[0013] Figure 1 is a perspective view of a display device according to an exemplary embodiment;

[0014] Figure 2 is according to some exemplary embodiments along Figure 1 a schematic cross-sectional view of the display device taken along the section line Xa-Xa' in

[0015] Figure 3 is a schematic plan view showing a display area of a first display substrate according to some embodiments;

[0016] Figure 4 is a schematic plan view showing a display area of a second display substrate according to some exemplary embodiments;

[0017] Figure 5 is a schematic plan view showing pixels of a first display substrate according to some exemplary embodiments;

[0018] Figure 6 is a cross-sectional view taken along the section line X5-X5' in Figure 5 according to some exemplary embodiments;

[0019] Figure 7 is a schematic diagram of a light-emitting element according to some exemplary embodiments;

[0020] Figure 8 is a cross-sectional view of a display device taken along the section line X1-X1' in Figure 3 and Figure 4 according to some exemplary embodiments;

[0021] Figure 9 is a magnified cross-sectional view of a part QM1 in Figure 8 according to some exemplary embodiments;

[0022] Figure 10 is a magnified cross-sectional view of a part QM2 in Figure 8 according to some exemplary embodiments;

[0023] Figure 11 is a schematic plan view showing an arrangement structure of a light-blocking member in a second display substrate according to some exemplary embodiments;

[0024] Figure 12 is a schematic plan view showing an arrangement structure of a first color filter, a second color filter, and a third color filter in a second display substrate according to some exemplary embodiments;

[0025] Figure 13 is a schematic plan view showing an arrangement structure of a first wavelength conversion pattern, a second wavelength conversion pattern, and a light-transmitting pattern in a second display substrate according to some exemplary embodiments;

[0026] Figure 14 is a cross-sectional view of a display device taken along the section line X2-X2' in Figure 3 and Figure 4 according to some exemplary embodiments;

[0027] Figure 15 is a cross-sectional view of a display device taken along the Figure 3 and Figure 4 section line X3-X3' in

[0028] Figure 16 is a cross-sectional view of a display device taken along the Figure 3 and Figure 4 section line X4-X4' in

[0029] Figures 17 to 22 is a cross-sectional view showing a display device at various stages of manufacture according to various exemplary embodiments;

[0030] Figure 23 is a schematic cross-sectional view of a display device according to some exemplary embodiments;

[0031] Figure 24 is according to some exemplary embodiments Figure 23 an enlarged cross-sectional view of a partial QM3 in

[0032] Figures 25 to 28 is a cross-sectional view showing a display device at various stages of manufacture according to various exemplary embodiments Figure 23 of

[0033] Figure 29 and Figure 30 are schematic cross-sectional views of a display device according to various exemplary embodiments;

[0034] Figure 31 is a schematic plan view showing the arrangement structure of a first color filter, a second color filter, and a third color filter in a second display substrate according to some exemplary embodiments;

[0035] Figure 32 is a schematic plan view showing the arrangement structure of a first wavelength conversion pattern, a second wavelength conversion pattern, and a light-transmitting pattern in a second display substrate according to some exemplary embodiments;

[0036] Figure 33 is a schematic cross-sectional view of a display device according to some exemplary embodiments;

[0037] Figure 34 is a schematic cross-sectional view of a display device according to some exemplary embodiments;

[0038] Figure 35 and Figure 36 are schematic cross-sectional views of a display device according to various exemplary embodiments;

[0039] Figure 37is a schematic plan view showing a display area of a first display substrate according to some exemplary embodiments;

[0040] Figure 38 is a schematic plan view showing a display area of a second display substrate according to some exemplary embodiments;

[0041] Figure 39 is according to some exemplary embodiments along Figure 37 and Figure 38 a cross-sectional view of a display device taken along section line X1-X1' in;

[0042] Figure 40 is according to some exemplary embodiments of Figure 39 an enlarged cross-sectional view of portion Q in; and

[0043] Figure 41 is a schematic cross-sectional view of a display device according to some exemplary embodiments. Detailed Description

[0044] In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of various exemplary embodiments. As used herein, the terms "embodiment" and "implementation" may be used interchangeably and are non-limiting examples that employ one or more of the inventive concepts disclosed herein. However, it is clear 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 devices are shown in block diagram form to avoid unnecessarily obscuring various exemplary embodiments. Additionally, various exemplary embodiments may be different but not necessarily exclusive. For example, without departing from the inventive concept, the specific shapes, configurations, and characteristics of an exemplary embodiment may be used or implemented in another exemplary embodiment.

[0045] Unless otherwise stated, the exemplary embodiments shown are to be understood as providing exemplary features of some exemplary embodiments with different details. Thus, unless otherwise stated, without departing from the inventive concept, various illustrated features, components, modules, layers, films, panels, regions, aspects, etc. (hereinafter, individually or collectively referred to as "elements" or "a plurality of elements") may be additionally combined, separated, interchanged, and / or rearranged.

[0046] The use of cross-hatching and / or shading in the drawings is generally provided to clarify the boundaries between adjacent elements. Thus, unless otherwise specified, the presence or absence of cross-hatching or shading does not convey or indicate any preference or requirement regarding the specific material, material properties, dimensions, proportions, commonality between the elements shown, and / or any other characteristics, attributes, properties, etc. of the elements. Additionally, in the drawings, for clarity and / or descriptive purposes, the dimensions and relative dimensions of the elements may be exaggerated. Thus, the dimensions and relative dimensions of the corresponding elements need not be limited to those shown in the drawings. When the exemplary embodiments can be implemented differently, the specific process sequences may be performed in a different order than that described. For example, two consecutively described processes may be performed substantially simultaneously or in an order opposite to that described. Additionally, the same reference numerals denote the same elements.

[0047] When an element such as a layer is referred to as being “on,” “connected to,” or “coupled to” another element, the element can be directly on, directly connected to, or directly coupled to the other element, or intervening elements may be present. However, when an element is referred to as being “directly on,” “directly connected to,” or “directly coupled to” another element, no intervening elements are present. Other terms and / or words used to describe the relationship between elements should be interpreted in the same manner, for example, “between” versus “directly between,” “adjacent” versus “directly adjacent,” “on” versus “directly on,” etc. Additionally, the term “connected” can refer to a physical connection, an electrical connection, and / or a fluid connection. Further, the DR1 axis, the DR2 axis, and the DR3 axis are not limited to the three axes of a rectangular coordinate system and can be interpreted in a broader sense. For example, the DR1 axis, the DR2 axis, and the DR3 axis can be perpendicular to each other, or can represent different directions that are not perpendicular to each other. For the purposes of the present disclosure, “at least one of (a) / (an) / (the) X, Y, and Z” and “at least one of (a) / (an) / (the) selections from the group 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 by way of example XYZ, XYY, YZ, and ZZ. As used herein, the term “and / or” includes any combination and all combinations of one or more of the associated listed items.

[0048] Although the terms “first,” “second,” etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are used to distinguish one element from another. Thus, the first element discussed below can be referred to as the second element without departing from the teachings of the disclosure.

[0049] For descriptive purposes, spatial relative terms such as "under", "below", "beneath", "underneath", "above", "on", "over", "higher" and "side" (e.g., as in "sidewall") may be used herein to describe the relationship of one element to another (other) element as shown in the figures. Spatial relative terms are intended to encompass different orientations of the device in use, operation and / or manufacture in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, an element described as "under" or "beneath" another element or feature will then be oriented "above" the other element or feature. Thus, the exemplary term "under" can encompass both an orientation of above and below. Additionally, the device may be otherwise oriented (e.g., rotated 90 degrees or at other orientations), and as such, the spatial relative descriptors used herein are to be interpreted accordingly.

[0050] The terms used herein are for the purpose of describing particular embodiments and are not intended to be limiting. As used herein, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are also intended to include the plural forms. Additionally, when the terms "comprises" and / or its variants and / or "includes" and / or its variants are used in this specification, it is stated that there are the stated features, integers, steps, operations, elements, components and / or groups thereof, but does not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups thereof. It is also noted that, as used herein, the terms "substantially", "about" and other similar terms are used as approximate terms and not as terms of degree, and thus they are used to account for the inherent deviations of measured, calculated and / or provided values that would be recognized by a person of ordinary skill in the art.

[0051] The various exemplary embodiments are described herein with reference to cross-sectional views, isometric views, perspective views, plan views and / or exploded views that are schematic illustrations of idealized exemplary embodiments and / or intermediate structures. As such, variations in the shapes of the illustrations due to, for example, manufacturing techniques and / or tolerances are to be expected. Accordingly, the exemplary embodiments disclosed herein should not be construed as limited to the shapes of the particular regions shown, but will include deviations in shapes due to, for example, manufacturing. For this reason, the regions shown in the figures are essentially schematic, and the shapes of these regions may not reflect the actual shape of the regions of the device, and thus are not intended to be limiting.

[0052] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure pertains as a part thereof. Terms (such as those defined in a general dictionary) should be interpreted as having a meaning consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

[0053] As is customary in the art, some exemplary embodiments are described and illustrated in terms of functional blocks, units, and / or modules in the drawings. Those skilled in the art will understand that these blocks, units, and / or modules can be physically implemented by electronic (or optical) circuits such as logic circuits, discrete components, microprocessors, hardwired circuits, memory elements, wiring connections, etc., which can be formed using semiconductor-based manufacturing technologies or other manufacturing technologies. In the case where the blocks, units, and / or modules are implemented by a microprocessor or other similar hardware, they can be programmed and controlled using software (e.g., microcode) to perform the various functions discussed herein, and can optionally be driven by firmware and / or software. It is also contemplated that each block, unit, and / or module can be implemented by dedicated hardware or as a combination of dedicated hardware performing some functions and a processor (e.g., one or more programmed microprocessors and associated circuits) performing other functions. Additionally, without departing from the inventive concept, each block, unit, and / or module of some exemplary embodiments can be physically separated into two or more interacting and discrete blocks, units, and / or modules. Furthermore, without departing from the inventive concept, the blocks, units, and / or modules of some exemplary embodiments can be physically combined into more complex blocks, units, and / or modules.

[0054] Hereinafter, various exemplary embodiments will be explained in detail with reference to the drawings.

[0055] Figure 1 is a perspective view of a display device according to some exemplary embodiments. Figure 2 is according to some exemplary embodiments along Figure 1 in the schematic cross-sectional view of the display device taken along the section line Xa-Xa'.

[0056] Refer to Figure 1 and Figure 2, the display device 1 can be applied to (or associated with) various electrical devices such as tablet personal computers (PCs), smart phones, vehicle navigation units, cameras, center information displays (CIDs) for vehicles, wristwatch-type electronic devices, personal digital assistants (PDAs), portable multimedia players (PMPs), game consoles, televisions, outdoor billboards, monitors, personal computers, notebook computers, etc. These devices are provided only as examples, and it will be understood that the exemplary display device can be applied to other electrical devices as long as it does not depart from the inventive concept.

[0057] In some embodiments, the display device 1 may have a rectangular (or substantially rectangular) shape in a plan view. The display device 1 may include two first sides extending in a first direction DR1 and two second sides extending in a second direction DR2 that intersects the first direction DR1. The corners where the first side and the second side of the display device 1 intersect may be right angles, but the exemplary embodiments are not limited thereto. For example, one or more corners may have a surface such as an arcuate surface. In some embodiments, the first side may be shorter than the second side, but the exemplary embodiments are not limited thereto. The planar shape of the display device 1 is not limited to the shown planar shape and may have a circular (or substantially circular) shape or other different shapes.

[0058] The display device 1 may include a display area DA where an image is displayed and a non-display area NDA where an image is not displayed. In some embodiments, the non-display area NDA may be positioned around the display area DA and may surround the display area DA.

[0059] In an embodiment, the display device 1 includes a first display substrate 100 and a second display substrate 300 facing the first display substrate 100, and may further include a sealing member 500 that binds the first display substrate 100 and the second display substrate 300. A filler 700 may be filled (or disposed) between the first display substrate 100 and the second display substrate 300.

[0060] Unless otherwise defined in this specification, the terms / words "on", "above", "upper side", "top side", and / or "upper surface" refer to the direction of a third direction DR3 that intersects the first direction DR1 and the second direction DR2 along which the second display substrate 300 is stacked on the first display substrate 100, and the terms / phrases "under", "beneath", "lower side", "bottom side", and / or "lower surface" refer to the direction opposite to the direction along which the second display substrate 300 is stacked on the first display substrate 100.

[0061] The first display substrate 100 may include elements and circuits for displaying an image. For example, the first display substrate 100 may include: a light-emitting element layer EML (see, for exampleFigure 8 ) including a light-emitting element disposed in a display area DA and emitting light; and a circuit element layer PAL (see, for example, Figure 8 ) including circuit elements for driving the light-emitting element disposed on the light-emitting element layer EML. The light-emitting elements of the light-emitting element layer EML may include self-light (or self-luminous) emitting elements. In an exemplary embodiment, the self-luminous elements may include at least one of an organic light-emitting diode, a quantum dot light-emitting diode, and an inorganic light-emitting diode. Hereinafter, the case where the self-luminous element is an inorganic light-emitting diode will be described; however, the exemplary embodiment is not limited thereto.

[0062] A second display substrate 300 may be disposed on the first display substrate 100 and face the first display substrate 100. The second display substrate 300 may include a color conversion pattern for converting the color of light incident from the first display substrate 100. In some embodiments, the color conversion pattern may include at least one of a color filter and a wavelength conversion pattern.

[0063] A sealing member 500 may be disposed between the first display substrate 100 and the second display substrate 300 in a non-display area NDA. The sealing member 500 may be disposed along the edges of the first display substrate 100 and the second display substrate 300 in the non-display area NDA to surround the display area DA in a plane. The first display substrate 100 and the second display substrate 300 may be bonded to each other by the sealing member 500. In some embodiments, the sealing member 500 may be made of an organic material. For example, the sealing member 500 may be made of an epoxy resin, but the exemplary embodiment is not limited thereto.

[0064] A filler 700 may be positioned in a space between the first display substrate 100 and the second display substrate 300. The space may be surrounded by the sealing member 500. The filler 700 may fill the space between the first display substrate 100 and the second display substrate 300. The filler 700 may be made of a light-transmitting material. In some exemplary embodiments, the filler 700 may be made of an organic material. For example, the filler 700 may be made of an Si-based organic material and / or an epoxy-based organic material, etc., but the exemplary embodiment is not limited thereto. In some cases, the filler 700 may be omitted. Hereinafter, reference will be made to Figure 1 and Figure 2 and each of the other drawings to describe the structure of the display device 1 in more detail.

[0065] Figure 3 is a schematic plan view showing a display area of a first display substrate according to some exemplary embodiments. Figure 4 is a schematic plan view showing a display area of a second display substrate according to some exemplary embodiments.

[0066] ReferenceFigures 1 to 4 In Figures 1 to 4 , a light-emitting region LA and a non-light-emitting region NLA can be defined in a display region DA of a first display substrate 100. The light-emitting region LA can include a first light-emitting region LA1, a second light-emitting region LA2, a third light-emitting region LA3, a fourth light-emitting region LA4, a fifth light-emitting region LA5, and a sixth light-emitting region LA6. Each of the light-emitting regions LA1, LA2, LA3, LA4, LA5, and LA6 can be a region where light generated by a light-emitting element of the first display substrate 100 is emitted to the outside of the first display substrate 100, and the non-light-emitting region NLA can be a region where the light is not emitted to the outside of the first display substrate 100.

[0067] In an embodiment, the light emitted from each of the light-emitting regions LA1, LA2, LA3, LA4, LA5, and LA6 to the outside of the first display substrate 100 can be light having a specific (or determined) center wavelength band. In some embodiments, the light can be blue light and can have a peak wavelength in a range from about 440 nm to about 480 nm.

[0068] The first display substrate 100 can include the light-emitting regions LA1, LA2, and LA3 in a first row RL1 arranged in the display region DA and the light-emitting regions LA4, LA5, and LA6 in a second row RL2 arranged in the display region DA. In the first display substrate 100, the first light-emitting region LA1, the second light-emitting region LA2, and the third light-emitting region LA3 can be arranged in the first row RL1 along a first direction DR1. According to an embodiment, in the first display substrate 100, the first light-emitting region LA1, the second light-emitting region LA2, and the third light-emitting region LA3 can be sequentially and repeatedly arranged in the first row RL1 along the first direction DR1. In addition, the fourth light-emitting region LA4, the fifth light-emitting region LA5, and the sixth light-emitting region LA6 can also be sequentially and repeatedly arranged in the second row RL2 adjacent to the first row RL1 in a second direction DR2 along the first direction DR1.

[0069] In some embodiments, a first width WL1 of the first light-emitting region LA1, a second width WL2 of the second light-emitting region LA2, and a third width WL3 of the third light-emitting region LA3 can be substantially the same. However, the exemplary embodiment is not limited thereto. For example, one or more of the plurality of light-emitting regions LA can have different widths from each other.

[0070] For example, a first width WL1 of a first light-emitting region LA1 measured along a first direction DR1 may be narrower than a second width WL2 of a second light-emitting region LA2 measured along the first direction DR1, and may be narrower than a third width WL3 of a third light-emitting region LA3 measured along the first direction DR1. In addition, the second width WL2 of the second light-emitting region LA2 and the third width WL3 of the third light-emitting region LA3 may also be different from each other. For example, the second width WL2 of the second light-emitting region LA2 may be wider than the third width WL3 of the third light-emitting region LA3. In some embodiments, the area of the second light-emitting region LA2 may be smaller than the area of the third light-emitting region LA3.

[0071] Although the widths of the first light-emitting region LA1, the second light-emitting region LA2, and the third light-emitting region LA3 in the first display substrate 100 are shown to be the same as each other in the drawings, the exemplary embodiments are not limited thereto.

[0072] A fourth light-emitting region LA4 adjacent to the first light-emitting region LA1 along a second direction DR2 may be the same as the first light-emitting region LA1 except that it is positioned in a second row RL2, and may be substantially the same as the first light-emitting region LA1 in terms of width, area, and the structure of components in the region. Similarly, the second light-emitting region LA2 and a fifth light-emitting region LA5 adjacent to each other along the second direction DR2 may have substantially the same structure, and the third light-emitting region LA3 and a sixth light-emitting region LA6 adjacent to each other along the second direction DR2 may have substantially the same structure.

[0073] A display area DA of the first display substrate 100 may include a plurality of pixels PX. The plurality of pixels PX may be arranged in a matrix direction or in a matrix arrangement, but the exemplary embodiments are not limited thereto. Each pixel PX may have a rectangular (or substantially rectangular) shape or a square (or substantially square) shape in a plan view, but the shape is not limited thereto. For example, the pixel PX may have a rhombus (or substantially rhombus) shape in which each side is inclined with respect to one direction, or some other geometric shape. Each pixel PX may include at least one light-emitting element 30 (shown in Figure 5 ) that emits light of a specific wavelength band to display a specific color.

[0074] Each pixel PX may include a plurality of sub-pixels, and each sub-pixel may include a light-emitting region. As shown in the drawings, the first light-emitting region LA1, the second light-emitting region LA2, and the third light-emitting region LA3 may be included in one pixel PX, and may be included in different sub-pixels, respectively. Details thereof will be described later.

[0075] The second display substrate 300 may face the first display substrate 100. A light-transmitting region TA and a light-blocking region BA may be defined in a display region DA of the second display substrate 300. The light-transmitting region TA may include a first light-transmitting region TA1, a second light-transmitting region TA2, a third light-transmitting region TA3, a fourth light-transmitting region TA4, a fifth light-transmitting region TA5, and a sixth light-transmitting region TA6. Each of the light-transmitting regions TA1, TA2, TA3, TA4, TA5, and TA6 may be a region where light emitted from the first display substrate 100 is transmitted through the second display substrate 300 and provided to the outside of the display device 1. The light-blocking region BA may be a region where light emitted from the first display substrate 100 is not transmitted through the second display substrate 300.

[0076] The second display substrate 300 may include the light-transmitting regions TA1, TA2, and TA3 in a first row RT1 disposed in the display region DA and the light-transmitting regions TA4, TA5, and TA6 in a second row RT2 disposed in the display region DA. In the second display substrate 300, the first light-transmitting region TA1, the second light-transmitting region TA2, and the third light-transmitting region TA3 may be disposed in the first row RT1 along a first direction DR1. In the second display substrate 300, the first light-transmitting region TA1, the second light-transmitting region TA2, and the third light-transmitting region TA3 may be sequentially and repeatedly disposed in the first row RT1 along the first direction DR1.

[0077] The first light-transmitting region TA1 may correspond to or overlap with the first light-emitting region LA1. Similarly, the second light-transmitting region TA2 may correspond to or overlap with the second light-emitting region LA2, and the third light-transmitting region TA3 may correspond to or overlap with the third light-emitting region LA3. As described above, the first light-emitting region LA1, the second light-emitting region LA2, and the third light-emitting region LA3 of the first display substrate 100 may be sequentially and repeatedly disposed in the first direction DR1, and the first light-transmitting region TA1, the second light-transmitting region TA2, and the third light-transmitting region TA3 of the second display substrate 300 corresponding to or overlapping with these light-emitting regions LA1, LA2, and LA3 may also be sequentially and repeatedly disposed in the first direction DR1.

[0078] The light provided from the first display substrate 100 may be transmitted through the first light-transmitting region TA1, the second light-transmitting region TA2, and the third light-transmitting region TA3 to be provided to the outside of the display device 1. When the light emitted from the first light-emitting region LA1 to the outside of the display device 1 is referred to as first emitted light, the light emitted from the second light-emitting region LA2 to the outside of the display device 1 is referred to as second emitted light, and the light emitted from the third light-emitting region LA3 to the outside of the display device 1 is referred to as third emitted light, the first emitted light may be light L1 of a first color (see Figure 8), the second emitted light may be light L2 of a second color different from the first color (see Figure 8 ), the third emitted light may be light L3 of a third color different from the first color and the second color (see Figure 8 ). In some embodiments, the light L1 of the first color may be blue light having a peak wavelength in the range of about 440 nm to about 480 nm, the light L2 of the second color may be green light having a peak wavelength in the range of about 510 nm to about 550 nm, and the light L3 of the third color may be red light having a peak wavelength in the range of about 610 nm to about 650 nm.

[0079] The fourth light-transmitting region TA4, the fifth light-transmitting region TA5, and the sixth light-transmitting region TA6 may be arranged in a second row RT2 adjacent to the first row RT1 along the second direction DR2. The fourth light-transmitting region TA4, the fifth light-transmitting region TA5, and the sixth light-transmitting region TA6 may also be sequentially and repeatedly arranged in the second row RT2 along the first direction DR1. The fourth light-transmitting region TA4 may correspond to or overlap with the fourth light-emitting region LA4, the fifth light-transmitting region TA5 may correspond to or overlap with the fifth light-emitting region LA5, and the sixth light-transmitting region TA6 may correspond to or overlap with the sixth light-emitting region LA6.

[0080] In some embodiments, the relationship between the width WT1 of the first light-transmitting region TA1, the width WT2 of the second light-transmitting region TA2, and the width WT3 of the third light-transmitting region TA3 measured in the first direction DR1 may be similar to the relationship between the width WL1 of the first light-emitting region LA1, the width WL2 of the second light-emitting region LA2, and the width WL3 of the third light-emitting region LA3 measured in the first direction DR1. For example, the first width WT1 of the first light-transmitting region TA1 measured along the first direction DR1, the second width WT2 of the second light-transmitting region TA2 measured along the first direction DR1, and the third width WT3 of the third light-transmitting region TA3 measured along the first direction DR1 may be substantially the same as each other. However, the exemplary embodiments are not limited thereto. For example, at least one of the plurality of light-transmitting regions TA may have different widths from each other.

[0081] For example, a first width WT1 of a first light-transmitting region TA1 measured along a first direction DR1 may be narrower than a second width WT2 of a second light-transmitting region TA2 measured along the first direction DR1, and may be narrower than a third width WT3 of a third light-transmitting region TA3 measured along the first direction DR1. In addition, the second width WT2 of the second light-transmitting region TA2 and the third width WT3 of the third light-transmitting region TA3 may also be different from each other. For example, the second width WT2 of the second light-transmitting region TA2 may be wider than the third width WT3 of the third light-transmitting region TA3. In some embodiments, the area of the second light-transmitting region TA2 may be smaller than the area of the third light-transmitting region TA3.

[0082] Although the widths of the first light-transmitting region TA1, the second light-transmitting region TA2, and the third light-transmitting region TA3 in the second display substrate 300 are shown to be the same as each other in the drawings, the exemplary embodiments are not limited thereto.

[0083] In terms of the width, area, structure of components in the region, and color of light emitted to the outside, a fourth light-emitting region LA4 may be substantially the same as a first light-emitting region LA1 adjacent to each other along a second direction DR2, a fifth light-emitting region LA5 may be substantially the same as a second light-emitting region LA2 adjacent to each other along the second direction DR2, and a sixth light-emitting region LA6 may be substantially the same as a third light-emitting region LA3 adjacent to each other along the second direction DR2.

[0084] In a display region DA of the second display substrate 300, a light-blocking region BA may be positioned outside (e.g., around) the light-transmitting regions TA1, TA2, TA3, TA4, TA5, and TA6. In some embodiments, the light-blocking region BA may be divided into a first light-blocking region BA1, a second light-blocking region BA2, a third light-blocking region BA3, a fourth light-blocking region BA4, a fifth light-blocking region BA5, a sixth light-blocking region BA6, and a seventh light-blocking region BA7.

[0085] The first light-blocking region BA1 may be positioned between the first light-transmitting region TA1 and the second light-transmitting region TA2 along the first direction DR1, the second light-blocking region BA2 may be positioned between the second light-transmitting region TA2 and the third light-transmitting region TA3 along the first direction DR1, and the third light-blocking region BA3 may be positioned between the third light-transmitting region TA3 and another first light-transmitting region TA1 along the first direction DR1.

[0086] The fourth light-blocking region BA4 can be positioned between the fourth light-transmitting region TA4 and the fifth light-transmitting region TA5 along the first direction DR1. The fifth light-blocking region BA5 can be positioned between the fifth light-transmitting region TA5 and the sixth light-transmitting region TA6 along the first direction DR1. The sixth light-blocking region BA6 can be positioned between the sixth light-transmitting region TA6 and another fourth light-transmitting region TA4 along the first direction DR1.

[0087] The seventh light-blocking region BA7 can be positioned between a first row RT1 and a second row RT2 adjacent to each other along the second direction DR2. In addition, the seventh light-blocking region BA7 can also be positioned between other rows except the first row RT1 and the second row RT2.

[0088] Hereinafter, reference will be made to Figures 1 to 4 and some other drawings to describe the structures of the first display substrate 100 and the second display substrate 300 of the display device 1 in more detail.

[0089] Figure 5 is a schematic plan view showing a pixel of the first display substrate according to some exemplary embodiments.

[0090] Referring to Figure 5 , each of the plurality of pixels PX may include a first sub-pixel PX1, a second sub-pixel PX2, and a third sub-pixel PX3. Each sub-pixel may include a light-emitting region LA in which a light-emitting element 30 is provided to emit light of a specific wavelength band.

[0091] In some embodiments, the first sub-pixel PX1, the second sub-pixel PX2, and the third sub-pixel PX3 may respectively emit light L1 of the same first color. Each sub-pixel may include the same type of light-emitting element 30 and emit the same light emitted from the light-emitting element 30, for example, light L1 of the first color. However, the exemplary embodiments are not limited thereto. For example, the first sub-pixel PX1 may emit light L1 of the first color, the second sub-pixel PX2 may emit light L2 of the second color, and the third sub-pixel PX3 may emit light L3 of the third color. Although Figure 5 shows that the pixel PX includes three sub-pixels, the exemplary embodiments are not limited thereto. For example, the pixel PX may include a smaller or larger number of sub-pixels.

[0092] Each sub-pixel of the first display substrate 100 may include a plurality of electrodes 21 and 22, a light-emitting element 30, a plurality of contact electrodes 26, a plurality of inner dams 41 and 42 (shown in Figure 6 ), a plurality of outer dams 43, and one or more insulating layers 51, 52, 53, and 55 (shown in Figure 6 ).

[0093] A plurality of electrodes 21 and 22 are electrically connected to the light-emitting element 30 and can receive a predetermined voltage so that the light-emitting element 30 emits light in a specific wavelength band. At least one of the electrodes 21 and 22 can be used to form an electric field in the sub-pixel to align the light-emitting element 30.

[0094] The plurality of electrodes 21 and 22 can include a first electrode 21 and a second electrode 22. In an exemplary embodiment, the first electrode 21 can be a pixel electrode separated for each sub-pixel, and the second electrode 22 can be a common electrode commonly connected along each sub-pixel. One of the first electrode 21 and the second electrode 22 is the anode electrode of the light-emitting element 30, and the other of the first electrode 21 and the second electrode 22 can be the cathode electrode of the light-emitting element 30, or vice versa. However, the exemplary embodiment is not limited thereto.

[0095] The first electrode 21 can include a first electrode main body portion 21S extending along a first direction DR1 and at least one first electrode branch portion 21B extending along a second direction DR2 and branching from the first electrode main body portion 21S, and the second electrode 22 can include a second electrode main body portion 22S extending along the first direction DR1 and a second electrode branch portion 22B extending along the second direction DR2 and branching from the second electrode main body portion 22S.

[0096] The first electrode main body portion 21S of any one sub-pixel can be capped so that two end portions of the first electrode main body portion 21S are spaced apart from each other between adjacent sub-pixels and can be placed on substantially the same line as the first electrode main body portion 21S adjacent thereto (e.g., adjacent to it in the first direction DR1) in the same row. Since the first electrode main body portion 21S of each sub-pixel is configured such that its two end portions are spaced apart from each other, different electrical signals can be applied to the first electrode branch portion 21B, and the first electrode branch portion 21B can be independently driven.

[0097] The first electrode branch portion 21B can branch from at least a part of the first electrode main body portion 21S and extend along the second direction DR2, but can be capped in a state of being spaced apart from the second electrode main body portion 22S provided to face the first electrode main body portion 21S.

[0098] The second electrode 22 may include a second electrode main part 22S extending along a first direction DR1, spaced apart from and facing the first electrode main part 21S, and a second electrode branch part 22B branching from the second electrode main part 22S and extending along a second direction DR2. The second electrode main part 22S may be connected to the second electrode main part 22S of another sub-pixel adjacent in the first direction DR1. That is, unlike the first electrode main part 21S, the second electrode main part 22S may extend along the first direction DR1 to cross the sub-pixels. The second electrode main part 22S crossing the sub-pixels may be connected to an external part of the display area DA in which each pixel PX (or sub-pixel) is provided or a part extending in one direction from the non-display area NDA.

[0099] The second electrode branch part 22B may be spaced apart from and face the first electrode branch part 21B, and may be capped in a state spaced apart from the first electrode main part 21S. The second electrode branch part 22B may be connected to the second electrode main part 22S, and an end part of the second electrode branch part 22B in the extending direction may be disposed in the sub-pixel while being spaced apart from the first electrode main part 21S.

[0100] Each of the first electrode 21 and the second electrode 22 may be electrically connected to a circuit element layer PAL of the first display substrate 100 through contact holes (e.g., a first electrode contact hole CNTD and a second electrode contact hole CNTS) (see Figure 8 ). Although in the drawings, the first electrode contact hole CNTD is formed for each first electrode main part 21S of each sub-pixel, and only one second electrode contact hole CNTS is formed in one second electrode main part 22S crossing each sub-pixel, the exemplary embodiments are not limited thereto. For example, in some cases, the second electrode contact hole CNTS may be formed for each sub-pixel.

[0101] A plurality of first inner dams 41 may be provided under the first electrode 21 and adjacent to the center of each sub-pixel, and a plurality of second inner dams 42 may be provided under the second electrode 22 and adjacent to the center of each sub-pixel. The first inner dam 41 may be provided under the first electrode branch part 21B, and the second inner dam 42 may be provided under the second electrode branch part 22B.

[0102] The outer bank 43 may be provided at the boundaries between corresponding sub-pixels. The ends of the plurality of first electrode main portions 21S may be capped while being spaced apart from each other with respect to the outer bank 43. The outer bank 43 may extend in the second direction DR2 and may be provided at the boundaries between sub-pixels arranged in the first direction DR1. The exemplary embodiments are not limited thereto. For example, the outer bank 43 may extend in the first direction DR1 and may be provided at the boundaries between sub-pixels arranged in the second direction DR2. For example, the outer bank 43 may define the boundaries of the sub-pixels. The outer bank 43 may include the same material as that of the inner banks 41 and 42 and may be formed together with the inner banks 41 and 42 in one process.

[0103] In an exemplary process of manufacturing the first display substrate 100, when ejecting the ink in which the light-emitting elements 30 are dispersed, the outer bank 43 may perform a function of preventing the ink from overflowing the boundaries of the sub-pixels. The outer bank 43 may separate the inks in which different light-emitting elements 30 are dispersed for each sub-pixel so that the inks do not mix with each other. However, the exemplary embodiments are not limited thereto.

[0104] The light-emitting elements 30 may be provided between the first electrode 21 and the second electrode 22. One end of the light-emitting element 30 may be electrically connected to the first electrode 21, and the other end of the light-emitting element 30 may be electrically connected to the second electrode 22. The light-emitting element 30 may be electrically connected to the first electrode 21 and the second electrode 22 through the contact electrode 26 which will be described later.

[0105] The plurality of light-emitting elements 30 may be spaced apart from each other and may be aligned substantially parallel to each other. The distance between the spaced-apart light-emitting elements 30 is not specifically limited. In some cases, some of the light-emitting elements 30 may be arranged adjacent to each other to form a group, and other light-emitting elements 30 may be arranged spaced apart from each other to form a group, and these light-emitting elements 30 may be arranged in one direction with non-uniform density. In the exemplary embodiment, the light-emitting element 30 has a shape extending in one direction, and the extending direction of each of the electrodes 21 and 22 (for example, the extending direction of the first electrode branch portion 21B and the second electrode branch portion 22B) may be substantially perpendicular to the extending direction of the light-emitting element 30. However, the exemplary embodiments are not limited thereto. For example, the light-emitting element 30 may be provided at an angle and not perpendicular to the extending directions of the first electrode branch portion 21B and the second electrode branch portion 22B.

[0106] According to an embodiment, the plurality of light-emitting elements 30 may include an active layer 33 having the same material to emit light of the same wavelength band or light of the same color. The light emitted from the plurality of pixels PX or sub-pixels included in the first display substrate 100 or the light emitted from each light-emitting region LA may have the same color. In an exemplary embodiment, the plurality of light-emitting elements 30 may emit light L1 of a first color, such as blue light having a center wavelength band in the range of 450 nm to 495 nm. Accordingly, the light L1 of the first color may be emitted from each light-emitting region LA of the first display substrate 100. However, the exemplary embodiment is not limited thereto. For example, each of the plurality of sub-pixels of the first display substrate 100 may include a light-emitting element 30 having an active layer 33 different from each other to emit light of different colors. For example, the first display substrate 100 may emit light of different colors for each light-emitting region LA.

[0107] The first display substrate 100 may include a second insulating layer 52 covering at least a portion of the first electrode 21 and at least a portion of the second electrode 22.

[0108] The second insulating layer 52 may be provided for each sub-pixel (or disposed in each sub-pixel). The second insulating layer 52 may be provided to completely cover each sub-pixel, and may be provided to extend to another adjacent sub-pixel. The second insulating layer 52 may be provided to cover at least a portion of the first electrode 21 and at least a portion of the second electrode 22. The second insulating layer 52 may be provided to expose a portion of the first electrode 21 and a portion of the second electrode 22, for example, to expose a portion of the first electrode branch portion 21B and a portion of the second electrode branch portion 22B.

[0109] Each of the plurality of contact electrodes 26 may have a shape in which a portion of the contact electrode 26 extends in one direction. Each of the plurality of contact electrodes 26 may be in contact with the light-emitting element 30 and the first electrode 21 and the second electrode 22. The light-emitting element 30 may receive an electrical signal from the first electrode 21 and the second electrode 22 through the contact electrode 26.

[0110] The contact electrode 26 may include a first contact electrode 26a and a second contact electrode 26b. The first contact electrode 26a may be disposed on the first electrode branch portion 21B, and the second contact electrode 26b may be disposed on the second electrode branch portion 22B.

[0111] The first contact electrode 26a may be disposed on the first electrode 21 or the first electrode branch portion 21B to extend along the second direction DR2. The first contact electrode 26a may contact one end of the light-emitting element 30. In addition, the first contact electrode 26a may contact the first electrode 21 exposed without the second insulating layer 52. Accordingly, the light-emitting element 30 may be electrically connected to the first electrode 21 through the first contact electrode 26a.

[0112] The second contact electrode 26b may be disposed on the second electrode 22 or the second electrode branch portion 22B to extend along the second direction DR2. The second contact electrode 26b may be spaced apart from the first contact electrode 26a in the first direction DR1. The second contact electrode 26b may contact the other end of the light-emitting element 30. In addition, the second contact electrode 26b may contact the second electrode 22 exposed without the second insulating layer 52. Accordingly, the light-emitting element 30 may be electrically connected to the second electrode 22 through the second contact electrode 26b. Although two first contact electrodes 26a and one second contact electrode 26b are shown in the drawings as being disposed in one sub-pixel, the exemplary embodiments are not limited thereto. For example, the number of the first contact electrodes 26a and the second contact electrodes 26b may vary according to the number of the first electrodes 21 and the second electrodes 22 being used or the number of the first electrode branch portions 21B and the second electrode branch portions 22B.

[0113] In some embodiments, the width of the first contact electrode 26a measured in one direction may be greater than the width of the first electrode branch portion 21B measured in the one direction, and the width of the second contact electrode 26b measured in one direction may be greater than the width of the second electrode branch portion 22B measured in the one direction. However, the exemplary embodiments are not limited thereto. For example, in some cases, the first contact electrode 26a may be disposed to cover only one side of the first electrode branch portion 21B, and the second contact electrode 26b may be disposed to cover only one side of the second electrode branch portion 22B.

[0114] The first display substrate 100 may include a circuit element layer PAL positioned under each of the electrodes 21 and 22, a third insulating layer 53 (shown in Figure 6 ), and a passivation layer 55 (shown in Figure 6 ) that is disposed to cover at least a portion of the light-emitting element 30 and each of the electrodes 21 and 22. Hereinafter, the structure of the first display substrate 10 will be described in more detail with reference to Figure 6 .

[0115] Figure 6 is a cross-sectional view taken along the section line X5-X5' in Figure 5 according to some exemplary embodiments.

[0116] Figure 6 The cross-sectional view of the light-emitting element layer EML of only the first sub-pixel PX1 is shown, but it can be similarly applied to other pixels PX or sub-pixels. Figure 6 A cross-sectional view is shown across one end and the other end of the light-emitting element 30 disposed in the first sub-pixel PX1.

[0117] The first display substrate 100 may further include a circuit element layer PAL disposed under each of the electrodes 21 and 22. The circuit element layer PAL includes a plurality of semiconductor layers and a plurality of conductive patterns, and may further include one or more switching elements T1, T2, and T3 (shown in Figure 8 ), and a power line. However, its detailed description will be omitted.

[0118] Referring to Figure 5 and Figure 6 , the first display substrate 100 may include a first insulating layer 51, electrodes 21 and 22 disposed on the first insulating layer 51, and a light-emitting element 30. The circuit element layer PAL may also be disposed under the first insulating layer 51. The first insulating layer 51 may include an organic insulating material to perform a surface planarization function.

[0119] A plurality of inner dams 41 and 42, an outer dam 43, a plurality of electrodes 21 and 22, and a light-emitting element 30 may be disposed on the first insulating layer 51.

[0120] The plurality of inner dams 41 and 42 may include a first inner dam 41 and a second inner dam 42 disposed adjacent to the center of each sub-pixel.

[0121] The first inner dam 41 and the second inner dam 42 are disposed to be spaced apart from each other and face each other. The first electrode 21 may be disposed on the first inner dam 41, and the second electrode 22 may be disposed on the second inner dam 42. For example, a first electrode branch portion 21B is disposed on the first inner dam 41, and a second electrode branch portion 22B is disposed on the second inner dam 42.

[0122] The first inner dam 41 and the second inner dam 42 may extend in each sub-pixel along the second direction DR2. However, the exemplary embodiment is not limited thereto. For example, the first inner dam 41 and the second inner dam 42 may be provided for each sub-pixel to form a pattern on the entire surface of the first display substrate 100. The plurality of inner dams 41 and 42 and the plurality of outer dams 43 may include, but are not limited to, polyimide (PI).

[0123] The first inner bank 41 and the second inner bank 42 may have a structure in which at least a part of them protrudes from the first insulating layer 51. The first inner bank 41 and the second inner bank 42 may protrude upward based on the plane where the light-emitting element 30 is disposed, and at least a part of the protruding portion may have an inclination with respect to the plane and / or the surface of the first insulating layer 51. Since the inner banks 41 and 42 have inclined sides protruding from the first insulating layer 51, the light emitted from the light-emitting element 30 can be reflected from the inclined sides of the inner banks 41 and 42. As will be described later, when the electrodes 21 and 22 disposed on the inner banks 41 and 42 include materials having a high reflectivity, the light emitted from the light-emitting element 30 can be reflected by the electrodes 21 and 22 to travel in the upward direction of the first insulating layer 51.

[0124] As described above, the plurality of inner banks 41 and 42 and the outer bank 43 may include the same material and may be formed in the same process. However, the outer bank 43 is formed at the boundary of each sub-pixel to form a grid pattern, while the inner banks 41 and 42 are disposed in each sub-pixel to have a shape extending in one direction.

[0125] The plurality of electrodes 21 and 22 may be disposed on the first insulating layer 51 and the inner banks 41 and 42. As described above, the first electrode 21 includes a first electrode main body portion 21S and a first electrode branch portion 21B, and the second electrode 22 includes a second electrode main body portion 22S and a second electrode branch portion 22B.

[0126] A part of the first electrode 21 and a part of the second electrode 22 may be disposed on the first insulating layer 51, and the other parts of the first electrode 21 and the second electrode 22 may be disposed on the first inner bank 41 and the second inner bank 42. As described above, the first electrode branch portion 21B of the first electrode 21 and the second electrode branch portion 22B of the second electrode 22 may extend in the second direction DR2, and the first inner bank 41 and the second inner bank 42 may also extend in the second direction DR2 to be disposed in sub-pixels adjacent in the second direction DR2.

[0127] The first electrode contact hole CNTD that penetrates through the first insulating layer 51 to expose a part of the circuit element layer PAL may be formed in the first electrode main body portion 21S of the first electrode 21. The first electrode 21 may be electrically connected to the switching element of the circuit element layer PAL through the first electrode contact hole CNTD. The first electrode 21 may receive a predetermined electrical signal from the switching element.

[0128] The second electrode main body portion 22S of the second electrode 22 may extend in one direction to be disposed in a non-light-emitting region NLA where the light-emitting element 30 is not disposed. A second electrode contact hole CNTS that penetrates through the first insulating layer 51 to expose a part of the circuit element layer PAL may be formed in the second electrode main body portion 22S of the second electrode 22. The second electrode 22 may be electrically connected to the power supply electrode through the second electrode contact hole CNTS. The second electrode 22 may receive a predetermined electrical signal from the power supply electrode.

[0129] Some regions of the first electrode 21 and the second electrode 22 (e.g., the first electrode branch portion 21B and the second electrode branch portion 22B) may be respectively disposed on the first inner bank 41 and the second inner bank 42. A plurality of light-emitting elements 30 may be disposed in the region between the first electrode 21 and the second electrode 22. For example, they may be disposed in the space where the first electrode branch portion 21B and the second electrode branch portion 22B are spaced apart from each other.

[0130] Each of the electrodes 21 and 22 may include a transparent conductive material. For example, each of the electrodes 21 and 22 may include a material such as indium tin oxide (ITO), indium zinc oxide (IZO), or indium tin zinc oxide (ITZO), but the exemplary embodiments are not limited thereto. In some embodiments, each of the electrodes 21 and 22 may include a highly reflective conductive material. For example, each of the electrodes 21 and 22 may include a metal such as silver (Ag), copper (Cu), or aluminum (Al) as the highly reflective material, but the exemplary embodiments are not limited thereto. In this case, the light incident on each of the electrodes 21 and 22 may be reflected and emitted upward in each sub-pixel.

[0131] In addition, the electrodes 21 and 22 may have a structure in which at least one transparent conductive material layer and at least one highly reflective metal layer are stacked, or may be formed as a single layer including these layers. In the exemplary embodiments, each of the electrodes 21 and 22 may have a laminated structure of ITO / Ag / ITO / IZO, or may include an alloy containing aluminum (Al), nickel (Ni), or lanthanum (La); however, the exemplary embodiments are not limited thereto.

[0132] The second insulating layer 52 is disposed on the first insulating layer 51, the first electrode 21, and the second electrode 22. The second insulating layer 52 is disposed to partially cover the first electrode 21 and the second electrode 22. The second insulating layer 52 may be disposed to cover most of the upper surfaces of the first electrode 21 and the second electrode 22, and may expose a part of the first electrode 21 and a part of the second electrode 22. The second insulating layer 52 may be disposed to expose a part of the upper surface of the first electrode 21 and a part of the upper surface of the second electrode 22. For example, the part of the upper surface of the first electrode branch portion 21B disposed on the first inner bank 41 and the part of the upper surface of the second electrode branch portion 22B disposed on the second inner bank 42 are exposed. For example, the second insulating layer 52 may be formed on the entire first surface of the first insulating layer 51 and may include openings that partially expose the first electrode 21 and the second electrode 22.

[0133] In an exemplary embodiment, a step may be formed in the second insulating layer 52 such that a part of the upper surface of the second insulating layer 52 is recessed between the first electrode 21 and the second electrode 22. In some embodiments, the second insulating layer 52 may include an inorganic insulating material, and a part of the upper surface of the second insulating layer 52 may be recessed due to the step of the member disposed under the second insulating layer 52 and disposed to cover the first electrode 21 and the second electrode 22. The light-emitting element 30 disposed on the second insulating layer 52 between the first electrode 21 and the second electrode 22 may form an empty space between the recessed upper surfaces of the second insulating layer 52. The light-emitting element 30 may be disposed to be spaced apart from a part of the upper surface of the second insulating layer 52, and the material constituting the third insulating layer 53 to be described later may fill the empty space. However, the exemplary embodiment is not limited thereto. The second insulating layer 52 may have a flat upper surface such that the light-emitting element 30 is disposed thereon.

[0134] The second insulating layer 52 may protect the first electrode 21 and the second electrode 22 and insulate them from each other. In addition, the second insulating layer 52 may prevent (or at least mitigate) the light-emitting element 30 disposed on the second insulating layer 52 from directly contacting other members and thus being damaged. However, the shape and structure of the second insulating layer 52 are not limited thereto.

[0135] The light-emitting element 30 may be disposed on the second insulating layer 52 between the electrodes 21 and 22. In some embodiments, at least one light-emitting element 30 may be disposed on the second insulating layer 52 provided between the electrode branch portions 21B and 22B. However, the exemplary embodiments are not limited thereto. At least some of the light-emitting elements 30 provided in each sub-pixel may be disposed in an area other than between the electrode branch portions 21B and 22B. The light-emitting element 30 may be disposed on each end portion where the first electrode branch portion 21B and the second electrode branch portion 22B face each other, and may be electrically connected to each of the electrodes 21 and 22 through the contact electrode 26.

[0136] In the light-emitting element 30, a plurality of layers may be arranged in a direction parallel to the first insulating layer 51. According to an embodiment, the light-emitting element 30 of the first display substrate 100 has a shape extending in one direction, and may have a structure in which a plurality of semiconductor layers are sequentially arranged in one direction. As described above, in the light-emitting element 30, the first semiconductor layer 31, the active layer 33, the second semiconductor layer 32, and the electrode layer 37 may be sequentially arranged along one direction, and their outer surfaces may be surrounded by the insulating film 38. The light-emitting element 30 provided in the first display substrate 100 may be disposed parallel to the first insulating layer 51 in one direction, and the plurality of semiconductor layers included in the light-emitting element 30 may be sequentially disposed in a direction parallel to the upper surface of the first insulating layer 51. However, the exemplary embodiments are not limited thereto. In some cases, when the light-emitting element 30 has a different structure, the plurality of layers may be arranged in a direction perpendicular to the first insulating layer 51 or another arrangement direction.

[0137] One end of the light-emitting element 30 may be in contact with the first contact electrode 26a, and the other end of the light-emitting element 30 may be in contact with the second contact electrode 26b. According to an embodiment, since the extending end portion of the light-emitting element 30 in one direction is exposed without the insulating film 38 formed thereon, the light-emitting element 30 may be in contact with the first contact electrode 26a and the second contact electrode 26b to be described later in the exposed area. However, the exemplary embodiments are not limited thereto. In some cases, in the light-emitting element 30, at least a part of the insulating film 38 may be removed, and thus, side surfaces of both ends of the light-emitting element 30 may be partially exposed.

[0138] The third insulating layer 53 may be partially disposed on the light-emitting element 30 and disposed between the first electrode 21 and the second electrode 22. The third insulating layer 53 may be configured to partially surround the outer surface of the light-emitting element 30. The third insulating layer 53 may be used to protect the light-emitting element 30 and may also be used to fix the light-emitting element 30 in the manufacturing process of the first display substrate 100. In addition, in an exemplary embodiment, a part of the material of the third insulating layer 53 may be disposed between the lower surface of the light-emitting element 30 and the second insulating layer 52. As described above, the third insulating layer 53 may be formed to fill the space between the second insulating layer 52 and the light-emitting element 30 formed during the manufacturing process of the first display substrate 100. Accordingly, the third insulating layer 53 may be formed to surround the outer surface of the light-emitting element 30. However, the exemplary embodiment is not limited thereto.

[0139] The third insulating layer 53 may extend in a second direction DR2 between the first electrode branch portion 21B and the second electrode branch portion 22B in a plan view. For example, the third insulating layer 53 may have an island shape (or a substantially island shape) or a linear shape (or a substantially linear shape) on the first insulating layer 51 in a plan view. According to an embodiment, the third insulating layer 53 may be disposed on the light-emitting element 30.

[0140] The first contact electrode 26a is disposed on the first electrode 21 and the third insulating layer 53, and the second contact electrode 26b is disposed on the second electrode 22 and the third insulating layer 53. The first contact electrode 26a and the second contact electrode 26b may be spaced apart from each other on the third insulating layer 53. The third insulating layer 53 may insulate the first contact electrode 26a and the second contact electrode 26b from each other such that the first contact electrode 26a and the second contact electrode 26b do not directly contact each other.

[0141] The first contact electrode 26a may contact an exposed area of the first electrode 21 on the first inner embankment 41, and the second contact electrode 26b may contact an exposed area of the second electrode 22 on the second inner embankment 42. The first contact electrode 26a and the second contact electrode 26b may transmit electrical signals transmitted from the electrodes 21 and 22 to the light-emitting element 30.

[0142] The contact electrode 26 may include a conductive material. For example, the contact electrode 26 may include ITO, IZO, ITZO, or aluminum (Al). However, the exemplary embodiment is not limited thereto.

[0143] The passivation layer 55 may be disposed on the contact electrode 26 and the third insulating layer 53. The passivation layer 55 may be used to protect the components disposed on the first insulating layer 51 from external environmental contaminants and / or conditions.

[0144] Each of the second insulating layer 52, the third insulating layer 53, and the passivation layer 55 described above may include an inorganic insulating material or an organic insulating material. In an exemplary embodiment, each of the second insulating layer 52, the third insulating layer 53, and the passivation layer 55 may include an inorganic insulating material such as silicon oxide (SiO x ), silicon nitride (SiN x ), silicon oxynitride (SiO x N y ), aluminum oxide (Al2O3), aluminum nitride (AlN), etc. In addition, each of the second insulating layer 52, the third insulating layer 53, and the passivation layer 55 may include an organic insulating material such as an acrylic resin, an epoxy resin, a phenolic resin, a polyamide resin, a polyimide resin, an unsaturated polyester resin, a polyphenylene resin, a polyphenylene sulfide resin, benzocyclobutene, a cardo resin, a silicone resin, a silsesquioxane resin, poly(methyl methacrylate), polycarbonate, a poly(methyl methacrylate)-polycarbonate synthetic resin, etc. However, the exemplary embodiment is not limited thereto.

[0145] Figure 7 is a schematic diagram of a light-emitting element according to some exemplary embodiments.

[0146] The light-emitting element 30 may be a light-emitting diode. For example, the light-emitting element 30 may be an inorganic light-emitting diode having a size in microns or nanometers and made of an inorganic material. When an electric field is formed between two electrodes 21 and 22 facing each other in a specific direction, the inorganic light-emitting diode may be aligned between the two electrodes 21 and 22. The light-emitting element 30 may be aligned between the electrodes 21 and 22 by an electric field formed on (or between) the two electrodes 21 and 22.

[0147] The light-emitting element 30 according to an embodiment may have a shape extending in one direction. The light-emitting element 30 may have a shape such as a rod, a wire, a tube, etc. In an exemplary embodiment, the light-emitting element 30 may be a cylindrical (or substantially cylindrical) shape or a rod-shaped (substantially rod-shaped) shape. However, the shape of the light-emitting element 30 is not limited thereto. The light-emitting element 30 may have a shape of a cube (or substantially cube), a rectangular parallelepiped (or substantially rectangular parallelepiped), a polygonal column (such as a hexagonal (or substantially hexagonal) column), or may have a shape extending in one direction and having a partially inclined outer surface. The plurality of semiconductors included in the light-emitting element 30, which will be described later, may have a structure arranged or stacked sequentially in one direction.

[0148] The light-emitting element 30 may include a semiconductor layer doped with impurities of any conductive type (e.g., p-type or n-type). The semiconductor layer may receive an electrical signal from an external power source and may transform (or convert) the electrical signal into light of a specific wavelength band.

[0149] Reference Figure 7 As shown in Figure 7 , the light-emitting element 30 may include a first semiconductor layer 31, a second semiconductor layer 32, an active layer 33, an electrode layer 37, and an insulating film 38.

[0150] The first semiconductor layer 31 may be an n-type semiconductor layer. For example, when the light-emitting element 30 emits light in the blue wavelength band, the first semiconductor layer 31 may include a semiconductor material having a chemical formula of Al x Ga y In 1-x-y N (0 ≤ x ≤ 1, 0 ≤ y ≤ 1, 0 ≤ x + y ≤ 1). For example, the semiconductor material may be any one of AlGaInN, GaN, AlGaN, InGaN, AlN, and InN that are uniformly doped with an n-type dopant. The first semiconductor layer 31 may be doped with an n-type dopant, and examples of the n-type dopant may include Si, Ge, and Sn. In an exemplary embodiment, the first semiconductor layer 31 may include n-GaN doped with n-type Si. The length of the first semiconductor layer 31 may have a range of 1.5 μm to 5 μm, but is not limited thereto.

[0151] The second semiconductor layer 32 is disposed on the active layer 33. The second semiconductor layer 32 may be a p-type semiconductor layer. For example, when the light-emitting element 30 emits light in the blue or green wavelength band, the second semiconductor layer 32 may include a semiconductor material having a chemical formula of Al x Ga y In 1-x-y N (0 ≤ x ≤ 1, 0 ≤ y ≤ 1, 0 ≤ x + y ≤ 1). For example, the semiconductor material may be any one of AlGaInN, GaN, AlGaN, InGaN, AlN, and InN that are uniformly doped with a p-type dopant. The second semiconductor layer 32 may be doped with a p-type dopant, and examples of the p-type dopant may include Mg, Zn, Ca, Se, and Ba. In an exemplary embodiment, the second semiconductor layer 32 may include p-GaN doped with p-type Mg. The length of the second semiconductor layer 32 may have a range of 0.05 μm to 0.10 μm, but is not limited thereto.

[0152] Although it is shown in Figure 7 that the first semiconductor layer 31 and the second semiconductor layer 32 are formed as one layer, the exemplary embodiment is not limited thereto. In some embodiments, depending on the material of the active layer 33, the first semiconductor layer 31 and the second semiconductor layer 32 may further include a greater number of layers, such as a cladding layer or a tensile strain barrier reduction (TSBR) layer. Details thereof will be described later with reference to other drawings.

[0153] ​​The active layer 33 is disposed between the first semiconductor layer 31 and the second semiconductor layer 32. The active layer 33 may include a material having a single quantum well structure or a multi-quantum well structure. When the active layer 33 includes a material having a multi-quantum well structure, the multi-quantum well structure may be a structure in which quantum layers and well layers are alternately stacked. The active layer 33 may emit light by the combination of electron-hole pairs according to an electrical signal applied through the first semiconductor layer 31 and the second semiconductor layer 32. For example, when the active layer 33 emits light in the blue wavelength band, the active layer 33 may include a material such as AlGaN or AlGaInN. For example, when the active layer 33 has a multi-quantum well structure in which quantum layers and well layers are alternately stacked, the quantum layer may include a material such as AlGaN or AlGaInN, and the well layer may include a material such as GaN or AlInN. In an exemplary embodiment, since the active layer 33 may include a quantum layer containing AlGaInN and a well layer containing AlInN, as described above, the active layer 33 may emit blue light having a central wavelength band in the range of 450 nm to 495 nm.

[0154] However, the exemplary embodiment is not limited thereto. The active layer 33 may have a structure in which a semiconductor material having a large (or high) bandgap energy and a semiconductor material having a small (or low) bandgap energy are alternately stacked, and may include other group III-V semiconductor materials according to the wavelength band of the emitted light. The light emitted from the active layer 33 is not limited to light in the blue wavelength band, and in some cases, the active layer 33 may emit light in the red wavelength band or the green wavelength band. The length of the active layer 33 may range from 0.05 μm to 0.10 μm, but is not limited thereto.

[0155] The light emitted from the active layer 33 may be emitted to both side surfaces and the longitudinal outer surface of the light-emitting element 30. The light emitted from the active layer 33 is not limited to one direction in terms of directivity.

[0156] The electrode layer 37 may be an ohmic contact electrode. However, the exemplary embodiment is not limited thereto, and the electrode layer 37 may be a Schottky contact electrode. The light-emitting element 30 may include at least one electrode layer 37. Although it is shown in Figure 7 that the light-emitting element 30 includes one electrode layer 37, the exemplary embodiment is not limited thereto. In some cases, the light-emitting element 30 may include a larger number of electrode layers 37, or the electrode layer 37 may be omitted. Even if the number of electrode layers 37 is different or the light-emitting element 30 includes or further includes other structures, the details of the light-emitting element 30 described later may be equivalently applied.

[0157] When the light-emitting element 30 is electrically connected to the electrodes 21 and 22 or the contact electrode 26 in the first display substrate 100 according to the embodiment, the electrode layer 37 can reduce the resistance between the light-emitting element 30 and the electrodes 21 and 22 or the contact electrode 26. The electrode layer 37 can include a conductive metal. For example, the electrode layer 37 can include at least one of aluminum (Al), titanium (Ti), indium (In), gold (Au), silver (Ag), indium tin oxide (ITO), indium zinc oxide (IZO), and indium tin zinc oxide (ITZO). In addition, the electrode layer 37 can include a semiconductor material doped with n-type or p-type impurities. The electrode layer 37 can include the same material or can include different materials, but the exemplary embodiments are not limited thereto.

[0158] The insulating film 38 is disposed to surround the outer surfaces of the plurality of semiconductor layers 31 and 32 and the plurality of electrode layers 37. In the exemplary embodiment, the insulating film 38 can be disposed to at least surround the outer surface of the active layer 33 and can extend in one direction along which the light-emitting element 30 extends. The insulating film 38 can be used to protect the foregoing members. For example, the insulating film 38 can be formed to surround the side surfaces of the members, but can be formed to expose both end portions (e.g., end end portions) of the light-emitting element 30 in the longitudinal direction.

[0159] Although it is shown in Figure 7 that the insulating film 38 is formed to extend from the first semiconductor layer 31 along the length direction of the light-emitting element 30 to cover the side surface of the electrode layer 37, the exemplary embodiments are not limited thereto. The insulating film 38 can only cover the outer surfaces of some of the semiconductor layers including the active layer 33, or can cover a part of the outer surface of the electrode layer 37 to partially expose the outer surface of the electrode layer 37. In addition, in a region adjacent to at least one end of the light-emitting element 30, the insulating film 38 can be formed to have a circular (or substantially circular) upper surface in cross section.

[0160] The thickness of the insulating film 38 can be in the range from 10 nm to 1.0 μm, but is not limited thereto. For example, the thickness of the insulating film 38 can be about 40 nm.

[0161] The insulating film 38 can include, for example, silicon oxide (SiO x ), silicon nitride (SiN x ), silicon oxynitride (SiO x N y), aluminum nitride (AlN), and aluminum oxide (Al2O3) having an insulating property. Therefore, the insulating film 38 can prevent an electrical short circuit that may occur when the active layer 33 is in direct contact with the electrodes 21 and 22, wherein the electrical signal is transmitted to the light emitting element 30 through the electrodes 21 and 22. In addition, because the insulating film 38 can protect the outer surface of the light emitting element 30 including the active layer 33, it can prevent the deterioration of the light emitting efficiency.

[0162] In some embodiments, the outer surface of the insulating film 38 may be surface treated. When manufacturing the first display substrate 100, the light emitting element 30 may be sprayed on the electrodes 21 and 22 or aligned on the electrodes 21 and 22 in a state where the light emitting element 30 is dispersed in a predetermined ink (or solution). In order to maintain a state where the light emitting element 30 is dispersed in the ink without being aggregated with other adjacent light emitting elements 30, the surface of the insulating film 38 may be hydrophobically treated or hydrophilically treated.

[0163] The light emitting element 30 may have a length h of 1 μm to 10 μm, such as 2 μm to 6 μm (e.g., 3 μm to 5 μm). The light emitting element 30 may have a diameter ranging from 300 nm to 700 nm, and may have an aspect ratio of 1.2 to 100. However, exemplary embodiments are not limited thereto, and the plurality of light emitting elements 30 included in the first display substrate 100 may have different diameters according to differences in the composition of the active layer 33. In some embodiments, the diameter of the light emitting element 30 may be about 500 nm.

[0164] Hereinafter, the second display substrate 300 will be described with reference to various drawings.

[0165] Figure 8 According to some exemplary embodiments, Figure 3 and Figure 4 A cross-sectional view of the display device taken along section line X1-X1'.

[0166] Figure 8 The cross sections corresponding to the first light emitting area LA1, the second light emitting area LA2 and the third light emitting area LA3 of the first display substrate 100 and the first light transmitting area TA1, the second light transmitting area TA2 and the third light transmitting area TA3 of the second display substrate 300 are shown.

[0167] Apart from Figure 3 and Figure 4 In addition, refer to Figure 8 As described above, the display device 1 includes the first display substrate 100 and the second display substrate 300 , and may further include the filler 700 positioned between the first display substrate 100 and the second display substrate 300 .

[0168] In an embodiment, the first display substrate 100 may include a circuit element layer PAL, a light-emitting element layer EML, and a thin film encapsulation layer 170. As described with reference to Figures 5 to 7 The light-emitting element layer EML may include a plurality of electrodes 21 and 22 and a plurality of light-emitting elements 30. Although one first electrode 21, one second electrode 22, and one light-emitting element 30 are shown in the drawings as being disposed in each light-emitting region LA or sub-pixel, the exemplary embodiments are not limited thereto. Additionally, the first display substrate 100 is not limited to the first display substrate 100 described above with reference to Figures 5 to 7 and may be modified in various structures. In this regard, in Figure 8 , for ease of explanation, new reference numerals are given to the first electrode AE, the second electrode CE, and the light-emitting element ED. However, even if not otherwise mentioned, their descriptions may be the same as those described above with reference to Figures 5 to 7 . Hereinafter, a detailed description of the light-emitting element layer EML will be omitted.

[0169] The circuit element layer PAL of the first display substrate 100 may include a first substrate 110, a plurality of switching elements T1, T2, and T3 disposed on the first substrate 110, and a via layer 120.

[0170] The first substrate 110 may be made of a light-transmissive material. In some embodiments, the first substrate 110 may be a glass substrate or a plastic substrate. When the first substrate 110 is a plastic substrate, the first substrate 110 may be flexible. In some embodiments, the first substrate 110 may further include a separate layer disposed on the glass substrate or the plastic substrate, for example, a buffer layer or an insulating layer. In some embodiments, a plurality of light-emitting regions LA1, LA2, LA3, LA4, LA5, and LA6 and non-light-emitting regions NLA may be defined in, on, or in relation to the first substrate 110.

[0171] The switching elements T1, T2, and T3 may be positioned on the first substrate 110. In some embodiments, the first switching element T1 may be positioned in the first light-emitting region LA1, the second switching element T2 may be positioned in the second light-emitting region LA2, and the third switching element T3 may be positioned in the third light-emitting region LA3. However, the exemplary embodiments are not limited thereto. In some embodiments, at least one of the first switching element T1, the second switching element T2, and the third switching element T3 may be positioned in the non-light-emitting region NLA.

[0172] In some embodiments, each of the first switching element T1, the second switching element T2, and the third switching element T3 may be a thin film transistor including polysilicon or a thin film transistor including an oxide semiconductor.

[0173] According to some exemplary embodiments, a plurality of signal lines (e.g., gate lines, data lines, and power supply lines) for transmitting signals to corresponding switching elements T1, T2, and T3 may be further disposed on the first substrate 110.

[0174] The via layer 120 may be positioned over the first switching element T1, the second switching element T2, and the third switching element T3. In some embodiments, the via layer 120 may be a planarization film. In some embodiments, the via layer 120 may be formed of an organic film. Illustratively, the via layer 120 may include at least one of an acrylic resin, an epoxy resin, an imide resin, and an ester resin. In some embodiments, the via layer 120 may include a positive photosensitive material or a negative photosensitive material.

[0175] The light-emitting element layer EML may be disposed on the via layer 120. For example, the first electrode AE, the second electrode CE, the light-emitting element ED, and the outer bank 43 may be disposed on the via layer 120. The outer bank 43 may be disposed corresponding to the non-light-emitting region NLA of the first display substrate 100, and the first electrode AE, the second electrode CE, and the light-emitting element ED may be disposed corresponding to the respective light-emitting regions LA. The first electrode AE1, the second electrode CE1, and the light-emitting element ED1 may be disposed in the first light-emitting region LA1, the first electrode AE2, the second electrode CE2, and the light-emitting element ED2 may be disposed in the second light-emitting region LA2, and the first electrode AE3, the second electrode CE3, and the light-emitting element ED3 may be disposed in the third light-emitting region LA3. Since its detailed description is the same as the above description, its detailed description will be omitted.

[0176] The thin film encapsulation layer 170 is disposed on the light-emitting element layer EML. The thin film encapsulation layer 170 is commonly disposed in the first light-emitting region LA1, the second light-emitting region LA2, the third light-emitting region LA3, and the non-light-emitting region NLA. In some embodiments, the thin film encapsulation layer 170 directly covers the passivation layer 55 of the light-emitting element layer EML. In some embodiments, the thin film encapsulation layer 170 may be directly disposed on the first electrode AE, the second electrode CE, and the light-emitting element ED where the passivation layer 55 is not disposed.

[0177] In some embodiments, the thin film encapsulation layer 170 may include a first inorganic encapsulation layer 171, an organic encapsulation layer 173, and a second inorganic encapsulation layer 175 sequentially stacked on the light-emitting element layer EML.

[0178] In some embodiments, each of the first inorganic encapsulation layer 171 and the second inorganic encapsulation layer 175 may include at least one of silicon nitride, aluminum nitride, zirconium nitride, titanium nitride, hafnium nitride, tantalum nitride, silicon oxide, aluminum oxide, titanium oxide, tin oxide, cerium oxide, silicon oxynitride (SiON), and lithium fluoride, etc.

[0179] In some embodiments, the organic encapsulation layer 173 may include at least one of an acrylic resin, a methacrylic resin, a polyisoprene, a vinyl resin, an epoxy resin, a urethane resin, a cellulose resin, a perylene resin, and the like.

[0180] However, the structure of the thin film encapsulation layer 170 is not limited to the examples described above, and various modifications can be made to the lamination structure of the thin film encapsulation layer 170.

[0181] The panel light blocking member 190 may be positioned on the thin film encapsulation layer 170. The panel light blocking member 190 may be positioned on the thin film encapsulation layer 170 and in the non-emitting area NLA. The panel light blocking member 190 may prevent light from entering between adjacent light emitting areas LA to prevent color mixing, thereby further improving color reproducibility.

[0182] In some embodiments, the panel light blocking member 190 may be disposed in the non-emitting area NLA to surround each of the light emitting areas LA1, LA2, LA3, LA4, LA5, and LA6 on the plane.

[0183] The panel light blocking member 190 may include an organic light blocking material and may be formed by a coating and exposure process of the organic light blocking material.

[0184] The filler 700 may be disposed on the panel light blocking member 190, and the second display substrate 300 is disposed on the filler 700. Hereinafter, the second display substrate 300 according to some exemplary embodiments will be described in more detail with reference to the respective drawings.

[0185] Figure 9 is according to some exemplary embodiments Figure 8 An enlarged cross-sectional view of a part QM1. Figure 10 is according to some exemplary embodiments Figure 8 An enlarged cross-sectional view of a part QM2. Figure 11 is a schematic plan view showing an arrangement structure of light blocking members in a second display substrate according to some exemplary embodiments. Figure 12 is a schematic plan view showing an arrangement structure of a first color filter, a second color filter, and a third color filter in a second display substrate according to some exemplary embodiments. Figure 13 is a schematic plan view showing an arrangement structure of a first wavelength conversion pattern, a second wavelength conversion pattern, and a light transmissive pattern in a second display substrate according to some exemplary embodiments. Figure 14 is according to some exemplary embodiments along Figure 3 and Figure 4 A cross-sectional view of a display device taken along the section line X2-X2' in. Figure 15 is according to some exemplary embodiments alongFigure 3 and Figure 4 A cross-sectional view of the display device taken along the cross-section line X3-X3' in Figure 4 . Figure 16 is a cross-sectional view of the display device taken along the Figure 3 and Figure 4 cross-section line X4-X4' in Figure 4 .

[0186] Except for Figure 8 referring to Figures 9 to 16 , the second display substrate 300 may include a second base body 310, a plurality of color filters 361, 363, and 365, partition walls 380, a plurality of wavelength conversion patterns 350 and 340, and a light-transmitting pattern 330.

[0187] The second base body 310 may be made of a light-transmitting material. In some embodiments, the second base body 310 may include a glass substrate or a plastic substrate. In some embodiments, the second base body 310 may further include a separate layer, for example, an insulating layer (such as an inorganic film). As Figure 4 shown in Figure 4 , a plurality of light-transmitting regions TA1, TA2, TA3, TA4, TA5, and TA6 and light-blocking regions BA may be defined in, on, or in relation to the second base body 310. A detailed description thereof will be omitted.

[0188] The color filters 361, 363, and 365 and the light-blocking member 320 may be disposed on a surface of the second base body 310 facing the first display substrate 100.

[0189] The color filters 361, 363, and 365 may include a first color filter 361, a second color filter 363, and a third color filter 365.

[0190] The first color filter 361 may be positioned on a surface of the second base body 310 and may be positioned in the first light-transmitting region TA1 and the fourth light-transmitting region TA4. In some embodiments, the first color filter 361 positioned in the first light-transmitting region TA1 and the first color filter 361 positioned in the fourth light-transmitting region TA4 may be connected to each other along the second direction DR2. For example, as Figure 12 shown in Figure 12 , the first color filter 361 positioned in the first row RT1 may extend along the second direction DR2 to connect to the first color filter 361 positioned in the second row RT2. The seventh light-blocking member 327 and the partition wall 380, which will be described later, may be disposed in a region where the first color filter 361 extends along the second direction DR2 to overlap with the seventh light-blocking region BA7. The seventh light-blocking member 327 and the partition wall 380 may extend from the seventh light-blocking region BA7 along the first direction DR1 to form the first light-transmitting region TA1 and the fourth light-transmitting region TA4 in the second direction DR2.

[0191] However, the exemplary embodiments are not limited thereto. In some embodiments, the first color filter 361 positioned in the first light-transmissive region TA1 and the first color filter 361 positioned in the fourth light-transmissive region TA4 may be spaced apart from each other. For example, the first color filter 361 may be provided in a bar shape extending along the second direction DR2 or in an island shape spaced apart in the second direction DR2.

[0192] The first color filter 361 may selectively transmit light L1 of a first color (e.g., blue light), and may block or absorb light L2 of a second color (e.g., green light) and light L3 of a third color (e.g., red light). In some embodiments, the first color filter 361 may be a blue color filter, and may include a blue colorant such as a blue dye or a blue pigment. It is also contemplated that the colorant may be understood as a concept including both dyes and pigments.

[0193] Similar to the first color filter 361, the second color filter 363 and the third color filter 365 may also be positioned on one surface of the second substrate 310. The second color filter 363 may be positioned in the second light-transmissive region TA2 and the fifth light-transmissive region TA5, and the third color filter 365 may be positioned in the third light-transmissive region TA3 and the sixth light-transmissive region TA6. In some embodiments, since the second color filter 363 and the third color filter 365 extend along the second direction DR2, the second color filter 363 and the third color filter 365 positioned in the first row RT1 may be connected to the second color filter 363 and the third color filter 365 positioned in the second row RT2. The seventh light-blocking member 327 and the partition wall 380, which will be described later, may be positioned in a region where the second color filter 363 and the third color filter 365 overlap with the seventh light-blocking region BA7. However, the exemplary embodiments are not limited thereto. In some embodiments, the second color filter 363 and the third color filter 365 may be spaced apart from each other between the first row RT1 and the second row RT2. For example, the second color filter 363 and the third color filter 365 may be provided in a bar shape extending along the second direction DR2 or in an island shape spaced apart in the second direction DR2.

[0194] The second color filter 363 may selectively transmit light L2 of a second color (e.g., green light), and may block or absorb light L1 of a first color (e.g., blue light) and light L3 of a third color (e.g., red light). In some embodiments, the second color filter 363 may be a green color filter, and may include a green colorant such as at least one of a green dye and a green pigment.

[0195] The third color filter 365 can selectively transmit light L3 of a third color (e.g., red light), and can block or absorb light L2 of a second color (e.g., green light) and light L1 of a first color (e.g., blue light). In some embodiments, the third color filter 365 can be a red color filter and can include a red colorant such as at least one of a red dye and a red pigment.

[0196] According to an embodiment, the first color filter 361, the second color filter 363, and the third color filter 365 can be spaced apart from each other. Referring to Figure 8 and Figure 12 , the first color filter 361, the second color filter 363, and the third color filter 365 can extend along a second direction DR2, but can be arranged to be spaced apart from each other in a first direction DR1. The first color filter 361 can extend along the second direction DR2 in a first light-transmitting region TA1, the second color filter 363 can extend along the second direction DR2 in a second light-transmitting region TA2, and the third color filter 365 can extend along the second direction DR2 in a third light-transmitting region TA3. In some embodiments, each of the first color filter 361, the second color filter 363, and the third color filter 365 can be formed in a bar shape extending along the second direction DR2, and can intersect a seventh light-blocking region BA7 between a first row RT1 and a second row RT2.

[0197] However, the exemplary embodiments are not limited thereto. In some embodiments, at least one of the first color filter 361, the second color filter 363, and the third color filter 365 can be all arranged to be spaced apart from the seventh light-blocking region BA7 between the first row RT1 and the second row RT2 along the second direction DR2. For example, at least one of the first color filter 361, the second color filter 363, and the third color filter 365 can be formed in an island shape. In some embodiments, the first color filter 361, the second color filter 363, and the third color filter 365 can be arranged to be stacked on top of each other. In this case, the lower surface of any one color filter can be in contact with the upper surface of another color filter. This configuration will be described later.

[0198] As described above, since the first light-transmitting region TA1, the second light-transmitting region TA2, and the third light-transmitting region TA3 may have the same width as each other, in some embodiments, the first color filter 361, the second color filter 363, and the third color filter 365 may also have the same width as each other. Since its description has been given above with respect to the light-transmitting region TA, its detailed description will be omitted. The first light-blocking region BA1, the second light-blocking region BA2, and the third light-blocking region BA3 may be disposed in the region between the first color filter 361, the second color filter 363, and the third color filter 365 spaced apart from each other. The light-blocking member 320 and the partition wall 380 to be described later may be disposed in the light-blocking region BA.

[0199] The light-blocking member 320 may be disposed on one surface of the second substrate 310 facing the first display substrate 100. The light-blocking member 320 may be disposed in the light-blocking region BA to block the transmission of light. The light-blocking member 320 may include an organic light-blocking material and may be formed by a coating process and an exposure process of the organic light-blocking material. In some embodiments, the light-blocking member 320 may be arranged in a planar lattice pattern as shown in Figure 11 . The light-blocking member 320 may be disposed in the light-blocking region BA to overlap with the non-light-emitting region NLA. However, the exemplary embodiments are not limited thereto.

[0200] As described above, external light may cause a problem of distorting the color reproducibility of the color conversion pattern. However, according to some embodiments, when the light-blocking member 320 is positioned on the second substrate 310, at least a part of the external light is absorbed by the light-blocking member 320. Therefore, color distortion caused by external light reflection can be reduced. In some embodiments, the light-blocking member 320 may prevent light from entering between adjacent light-transmitting regions TA to prevent color mixing, thereby further improving color reproducibility.

[0201] The light-blocking member 320 may be arranged to overlap with the light-blocking region BA. As shown in Figure 8 and Figure 11As shown, the light blocking member 320 may extend in a first direction DR1 and a second direction DR2 in the light blocking region BA. The light blocking member 320 may include a first light blocking member 321 disposed in a first light blocking region BA1, a second light blocking member 322 disposed in a second light blocking region BA2, a third light blocking member 323 disposed in a third light blocking region BA3, a fourth light blocking member 324 disposed in a fourth light blocking region BA4, a fifth light blocking member 325 disposed in a fifth light blocking region BA5, a sixth light blocking member 326 disposed in a sixth light blocking region BA6, and a seventh light blocking member 327 disposed in a seventh light blocking region BA7. In some embodiments, the first light blocking member 321, the second light blocking member 322, and the third light blocking member 323 may extend in the second direction DR2 to connect to the seventh light blocking member 327, and the fourth light blocking member 324, the fifth light blocking member 325, and the sixth light blocking member 326 may also extend in the second direction DR2 to connect to the seventh light blocking member 327.

[0202] The light blocking member 320 may be disposed to surround a first light transmissive region TA1, a second light transmissive region TA2, a third light transmissive region TA3, a fourth light transmissive region TA4, a fifth light transmissive region TA5, and a sixth light transmissive region TA6. Accordingly, the light blocking member 320 may be disposed between the color filters 361, 363, and 365 such that both sides of the light blocking member 320 in the first direction DR1 may be in contact with the color filters 361, 363, and 365, respectively. In the process of manufacturing the second display substrate 300, the light blocking member 320 may be formed on the second substrate 310 before forming the color filters 361, 363, and 365. Thus, as Figure 8 shown, in the first direction DR1, the first color filter 361 may be disposed on one side of the first light blocking member 321, and the second color filter 363 may be disposed on the other side of the first light blocking member 321. Similarly, in the first direction DR1, the second color filter 363 may be disposed on one side of the second light blocking member 322, and the third color filter 365 may be disposed on the other side of the second light blocking member 322. In addition, in the first direction DR1, the third color filter 365 may be disposed on one side of the third light blocking member 323, and the first color filter 361 may be disposed on the other side of the third light blocking member 323. The plurality of color filters 361, 363, and 365 may be disposed to be spaced apart from each other on the light blocking member 320, and the light blocking member 320 is disposed between adjacent color filters 361, 363, and 365. However, the exemplary embodiments are not limited thereto.

[0203] A first cover layer 391 covering the first color filter 361, the second color filter 363, the third color filter 365, and the light blocking member 320 may be disposed on one surface of the second substrate 310. In some embodiments, the first cover layer 391 may be in direct contact with the first color filter 361, the second color filter 363, and the third color filter 365. In addition, the first cover layer 391 may be in direct contact with the light blocking member 320 partially. For example, the first cover layer 391 may be in partial contact with one surface portion of the first light blocking member 321 that is exposed by being spaced apart from the first color filter 361 and the second color filter 363.

[0204] The first cover layer 391 may prevent the first color filter 361, the second color filter 363, the third color filter 365, etc. from being damaged and / or contaminated due to infiltration of impurities such as moisture or air from the outside. In addition, the first cover layer 391 may prevent color materials included in the first color filter 361, the second color filter 363, and the third color filter 365 from diffusing into components different from the first color filter 361, the second color filter 363, and the third color filter 365, for example, prevent diffusion into the light transmissive pattern 330, the first wavelength conversion pattern 340, and / or the second wavelength conversion pattern 350. In some embodiments, the first cover layer 391 may include an inorganic material. For example, the first cover layer 391 may include at least one of 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.

[0205] The first cover layer 391 may also be in contact with the partition wall 380 described later. In some embodiments, the first cover layer 391 may be in contact with the partition wall 380 at least in the light blocking region BA. As will be described later, the partition wall 380 may be disposed between the first color filter 361, the second color filter 363, and the third color filter 365, and the first cover layer 391 may be in contact with the partition wall 380 between the first color filter 361, the second color filter 363, and the third color filter 365.

[0206] The light transmissive pattern 330, the first wavelength conversion pattern 340, and the second wavelength conversion pattern 350 may be disposed on one surface of the first cover layer 391. In some embodiments, the light transmissive pattern 330, the first wavelength conversion pattern 340, and the second wavelength conversion pattern 350 may be formed by an inkjet method. However, the exemplary embodiments are not limited thereto. For example, the light transmissive pattern 330, the first wavelength conversion pattern 340, and the second wavelength conversion pattern 350 may be formed by coating a photosensitive material and exposing and developing the photosensitive material. Hereinafter, a case of forming the light transmissive pattern 330, the first wavelength conversion pattern 340, and the second wavelength conversion pattern 350 by an inkjet method will be illustrated and described.

[0207] The light-transmissive pattern 330 may be positioned on a surface of the first cover layer 391 and may be positioned in the first light-transmissive region TA1 and the fourth light-transmissive region TA4. In some embodiments, the light-transmissive pattern 330 may have a structure in which a portion positioned in the first light-transmissive region TA1 and a portion positioned in the fourth light-transmissive region TA4 are spaced apart from each other, that is, may be formed in the form of an island pattern.

[0208] The light-transmissive pattern 330 may transmit incident light. As described above, the first display substrate 100 may include light-emitting elements (such as Figure 5 the light-emitting element 30 in Figure 8 or the light-emitting elements ED1 to ED3 in

[0209] that emit light L1 of the same color as each other). For example, the light-emitting element 30 or ED1 to ED3 may provide the light L1 of the first color to the light-transmissive pattern 330 and the wavelength conversion patterns 340 and 350 of the second display substrate 300. Among the light-emitting elements 30 or ED1 to ED3 of the first display substrate 100, the first-color emitted light L1 provided from the first light-emitting element ED1 of the first light-emitting region LA1 may transmit through the light-transmissive pattern 330 and the first color filter 361 and may be emitted to the outside of the display device 1. For example, the light emitted from the first light-transmissive region TA1 may be the light L1 of the first color, for example, blue light.

[0209] In some embodiments, the light-transmissive pattern 330 may include a first matrix resin 331 and may further include a first scatterer 333 dispersed in the first matrix resin 331.

[0210] The first matrix resin 331 may be made of a material having a high light transmittance. In some embodiments, the first matrix resin 331 may be made of an organic material. For example, the first matrix resin 331 may include an organic material such as at least one of epoxy resin, acrylic resin, cardo resin, and imide resin. However, the exemplary embodiments are not limited thereto.

[0211] The first scatterer 333 may have a refractive index different from that of the first base resin 331 and may form an optical interface with the first base resin 331. For example, the first scatterer 333 may be light-scattering particles. The first scatterer 333 is not particularly limited as long as it is a material capable of scattering at least a part of the transmitted light, but may be, for example, at least one of metal oxide particles and organic particles. The metal oxide particles may include at least one of titanium oxide (TiO2), zirconium oxide (ZrO2), aluminum oxide (Al2O3), indium oxide (In2O3), zinc oxide (ZnO), and tin oxide (SnO2). The organic particles may include at least one of an acrylic resin and a urethane resin. The first scatterer 333 may scatter light in a random direction independent of the incident direction of the incident light, and may substantially not convert the wavelength of the light passing through the light-transmitting pattern 330.

[0212] The first wavelength conversion pattern 340 may be positioned on one surface of the first cover layer 391 and may be positioned in the second light-transmitting region TA2 and the fifth light-transmitting region TA5. In some embodiments, the first wavelength conversion pattern 340 may have a structure in which a portion positioned in the second light-transmitting region TA2 and a portion positioned in the fifth light-transmitting region TA5 are spaced apart from each other. For example, the first wavelength conversion pattern 340 may be formed in the form of an island pattern.

[0213] The first wavelength conversion pattern 340 may convert or transform incident light having a peak wavelength into light having another specific peak wavelength and then may emit the converted or transformed light. The first display substrate 100 may include light-emitting elements (such as Figure 5 the light-emitting element 30 in Figure 8 or the light-emitting elements ED1 to ED3 in

[0214] that emit light L1 of the same color as each other). For example, the light-emitting element 30 or ED1 to ED3 may provide the light L1 of the first color to the light-transmitting pattern 330 of the second display substrate 300 and the wavelength conversion patterns 340 and 350. In some embodiments, the first wavelength conversion pattern 340 may convert the light L1 of the first color provided by the second light-emitting element ED2 of the second light-emitting region LA2 of the first display substrate 100 into green light L2 having a peak wavelength in the range from about 510 nm to about 550 nm and then emit the green light L2.In some embodiments, the first wavelength conversion pattern 340 may include a second matrix resin 341 and a first wavelength conversion material 345 dispersed in the second matrix resin 341, and may further include a second scatterer 343 dispersed in the second matrix resin 341. In some embodiments, the second matrix resin 341 may be made of an organic material. For example, the second matrix resin 341 may be made of the same material as the first matrix resin 331, or may include at least one of the materials exemplified as the constituent materials of the first matrix resin 331. However, the exemplary embodiments are not limited thereto.

[0215] The first wavelength conversion material 345 may convert or transform the peak wavelength of the incident light into another specific peak wavelength. In some embodiments, the first wavelength conversion material 345 may convert the blue light L1 of the first color emitted from the second light-emitting element ED2 into green light L2 having a peak wavelength in the range from about 510 nm to about 550 nm, and may emit the green light L2.

[0216] Examples of the first wavelength conversion material 345 may include at least one of quantum dots, quantum rods, and phosphors. For example, a quantum dot may be a particulate matter that emits light of a specific color in response to electrons transitioning from the conduction band to the valence band.

[0217] A quantum dot may be a semiconductor nanocrystal material. A quantum dot may have a specific bandgap to absorb light according to its composition and size, and then emit light having an inherent (or determined) wavelength. Examples of the semiconductor nanocrystals of the quantum dots may include at least one of group-IV nanocrystals, II-VI compound nanocrystals, III-V compound nanocrystals, and IV-VI compound nanocrystals.

[0218] The II-VI compounds may include at least one of binary compounds, ternary compounds, and quaternary compounds. The binary compounds are at least one of CdSe, CdTe, ZnS, ZnSe, ZnTe, ZnO, HgS, HgSe, HgTe, MgSe, and MgS. The ternary compounds are at least one of InZnP, AgInS, CuInS, CdSeS, CdSeTe, CdSTe, ZnSeS, ZnSeTe, ZnSTe, HgSeS, HgSeTe, HgSTe, CdZnS, CdZnSe, CdZnTe, CdHgS, CdHgSe, CdHgTe, HgZnS, HgZnSe, HgZnTe, MgZnSe, and MgZnS. The quaternary compounds are at least one of HgZnTeS, CdZnSeS, CdZnSeTe, CdZnSTe, CdHgSeS, CdHgSeTe, CdHgSTe, HgZnSeS, HgZnSeTe, and HgZnSTe.

[0219] The group III-V compound can be at least one of a binary compound, a ternary compound, and a quaternary compound. The binary compound is at least one of, for example, GaN, GaP, GaAs, GaSb, AlN, AlP, AlAs, AlSb, InN, InP, InAs, and InSb. The ternary compound is at least one of, for example, GaNP, GaNAs, GaNSb, GaPAs, GaPSb, AlNP, AlNAs, AlNSb, AlPAs, AlPSb, InGaP, InNP, InAlP, InNAs, InNSb, InPAs, and InPSb. The quaternary compound is at least one of, for example, GaAlNP, GaAlNAs, GaAlNSb, GaAlPAs, GaAlPSb, GaInNP, GaInNAs, GaInNSb, GaInPAs, GaInPSb, InAlNP, InAlNAs, InAlNSb, InAlPAs, and InAlPSb.

[0220] The group IV-VI compound can be at least one of a binary compound, a ternary compound, and a quaternary compound. The binary compound is at least one of, for example, SnS, SnSe, SnTe, PbS, PbSe, and PbTe. The ternary compound is at least one of, for example, SnSeS, SnSeTe, SnSTe, PbSeS, PbSeTe, PbSTe, SnPbS, SnPbSe, and SnPbTe. The quaternary compound is at least one of, for example, SnPbSSe, SnPbSeTe, and SnPbSTe. The group IV element can be at least one of Si and Ge. The group IV compound can be a binary compound such as at least one of SiC and SiGe.

[0221] According to some embodiments, the binary compound, the ternary compound, and / or the quaternary compound can exist as particles at a uniform concentration, or can exist as the same particles in a state where the concentration distribution is partially different. In addition, the binary compound, the ternary compound, and / or the quaternary compound can have a core-shell structure in which one quantum dot surrounds another quantum dot. The interface between the core and the shell can have a concentration gradient in which the concentration of the element in the shell decreases in a determined direction thereat (e.g., decreases toward the center).

[0222] In some embodiments, the quantum dots may have a core-shell structure including a core comprising at least one of the aforementioned nanocrystals and a shell surrounding the core. The shell of the quantum dots may serve as a protective layer for maintaining semiconductor properties and / or as a charged layer for imparting electrophoretic properties to the quantum dots by preventing chemical denaturation of the core. The shell may be a single-layer or multi-layer structure. The interface between the core and the shell may have a concentration gradient in which the concentration of the elements in the shell decreases in a determined direction (e.g., decreases towards the center). Examples of the shell of the quantum dots may include at least one of metal oxides, non-metal oxides, and semiconductor compounds.

[0223] Examples of metal or non-metal oxides may include, but are not limited to, at least one of binary compounds and ternary compounds. Binary compounds are at least one of, such as SiO2, Al2O3, TiO2, ZnO, MnO, Mn2O3, Mn3O4, CuO, FeO, Fe2O3, Fe3O4, CoO, Co3O4, and NiO. Ternary compounds are at least one of, such as MgAl2O4, CoFe2O4, NiFe2O4, and CoMn2O4.

[0224] Examples of semiconductor compounds may include, but are not limited to, at least one of CdS, CdSe, CdTe, ZnS, ZnSe, ZnTe, ZnSeS, ZnTeS, GaAs, GaP, GaSb, HgS, HgSe, HgTe, InAs, InP, InGaP, InSb, AlAs, AlP, and AlSb.

[0225] The light emitted from the first wavelength conversion material 345 may have a full width at half maximum (FWHM) of about 45 nm or less (such as about 40 nm or less (e.g., about 30 nm or less)), and thus, the color purity and color reproducibility of the color displayed by the display device 1 can be further improved. In addition, the light emitted from the first wavelength conversion material 345 may be emitted in all directions, regardless of the incident direction of the incident light. As a result, the lateral visibility of the green light L2 displayed in the second light-transmitting region TA2 can be improved.

[0226] A part of the light provided from the first display substrate 100 may be emitted by passing through the first wavelength conversion pattern 340 without being converted into the green light L2 by the first wavelength conversion material 345. A part of the light emitted from the first display substrate 100 that is not converted by the first wavelength conversion pattern 340 and is incident on the second color filter 363 may be blocked by the second color filter 363. In contrast, the green light L2 converted by the first wavelength conversion pattern 340 in the light emitted from the first display substrate 100 is transmitted through the second color filter 363 and emitted to the outside. For example, the light emitted from the second light-transmitting region TA2 may be the green light L2.

[0227] The second scatterer 343 may have a refractive index different from that of the second matrix resin 341 and form an optical interface together with the second matrix resin 341. For example, the second scatterer 343 may be light-scattering particles. The detailed description of the second scatterer 343 is substantially the same as or similar to the detailed description of the first scatterer 333, and thus, its description will be omitted.

[0228] The second wavelength conversion pattern 350 may be positioned on one surface of the first cover layer 391 and may be positioned in the third light-transmitting region TA3 and the sixth light-transmitting region TA6. In some embodiments, the second wavelength conversion pattern 350 may have a structure in which a portion positioned in the third light-transmitting region TA3 and a portion positioned in the sixth light-transmitting region TA6 are spaced apart from each other, and for example, may be formed in the form of an island pattern.

[0229] The second wavelength conversion pattern 350 may convert or transform incident light having a peak wavelength into light having a different peak wavelength and then may emit the converted or transformed light. In some embodiments, the second wavelength conversion pattern 350 may convert light L1 of a first color provided by the third light-emitting element ED3 of the third light-emitting region LA3 of the first display substrate 100 into red light L3 having a peak wavelength in the range of from about 610 nm to about 650 nm and then emit the red light L3.

[0230] In some embodiments, the second wavelength conversion pattern 350 may include a third matrix resin 351 and a second wavelength conversion material 355 dispersed in the third matrix resin 351, and may further include a third scatterer 353 dispersed in the third matrix resin 351.

[0231] The third matrix resin 351 may be made of a material having a high light transmittance. In some embodiments, the third matrix resin 351 may be made of an organic material. In some embodiments, the third matrix resin 351 may be made of the same material as the first matrix resin 331 or may include at least one of the materials exemplified as the constituent materials of the first matrix resin 331. However, the exemplary embodiments are not limited thereto.

[0232] The second wavelength conversion material 355 may convert or transform the peak wavelength of incident light into another specific peak wavelength. In some embodiments, the second wavelength conversion material 355 may convert light L1 of a first color having a peak wavelength of 440 nm to 480 nm into red light L3 having a peak wavelength in the range of from about 610 nm to about 650 nm.

[0233] Examples of the second wavelength conversion material 355 may include at least one of quantum dots, quantum rods, and phosphors. The description of the second wavelength conversion material 355 is substantially the same as or similar to the description of the first wavelength conversion material 345, and thus, its description will be omitted.

[0234] In some embodiments, both the first wavelength conversion material 345 and the second wavelength conversion material 355 may be made of quantum dots. In this case, the particle size of the quantum dots constituting the first wavelength conversion material 345 may be different from the particle size of the quantum dots constituting the second wavelength conversion material 355.

[0235] The third scatterer 353 may have a refractive index different from that of the third matrix resin 351 and form an optical interface together with the third matrix resin 351. For example, the third scatterer 353 may be light-scattering particles. The detailed description of the third scatterer 353 is substantially the same as or similar to the detailed description of the first scatterer 333, and thus, its description will be omitted.

[0236] The second wavelength conversion pattern 350 may be provided with light L1 of a first color emitted from the third light-emitting element ED3, and the second wavelength conversion material 355 may convert the light L1 provided from the third light-emitting element ED3 into red light L3 having a peak wavelength in the range from about 610 nm to about 650 nm and emit the red light L3.

[0237] According to various embodiments, the light L1 emitted from the first display substrate 100 may be incident on the light-transmitting pattern 330, the first wavelength conversion pattern 340, and the second wavelength conversion pattern 350. As described above with reference to Figure 6 The light-emitting element 30 of the first display substrate 100 may be disposed between the first electrode 21 and the second electrode 22, and the light emitted from the light-emitting element 30 may be reflected by the first electrode 21 and the second electrode 22 and transmitted upward, for example, toward the second display substrate 300. However, since the light provided from the first display substrate 100 to the second display substrate 300 is reflected or scattered by the first electrode 21 and the second electrode 22 and not directly provided from the light-emitting element 30, a reduction in the brightness of the light and a reduction in the light path distribution may occur.

[0238] To solve or address the above-mentioned problems, the light-transmitting pattern 330, the first wavelength conversion pattern 340, and the second wavelength conversion pattern 350 of the second display substrate 300 may have a structure in which the light provided from the first display substrate 100 can be collected. According to an embodiment, at least a part of the light-transmitting pattern 330, the first wavelength conversion pattern 340, and the second wavelength conversion pattern 350 may include a curved surface. A more detailed description thereof will be provided in conjunction with at least Figure 9 and Figure 10 provide a more detailed description thereof.

[0239] Figure 9 is an enlarged view showing light emitted from the first display substrate 100 incident on the transmissive pattern 330, Figure 10 is an enlarged view showing light emitted from the first display substrate 100 incident on the first wavelength conversion pattern 340. Although Figure 10 only the first wavelength conversion pattern 340 is shown, the description thereof can be equivalently applied to the second wavelength conversion pattern 350.

[0240] Referring to Figure 9 and Figure 10 , the transmissive pattern 330 and the wavelength conversion patterns 340 and 350 of the second display substrate 300 may include a first surface CS1 facing the first display substrate 100 and a second surface CS2 facing away from the first surface CS1 and facing the color filters 361, 363, and 365. The color filters 361, 363, and 365 may include a third surface CS3 in contact with the second substrate 310 and a fourth surface CS4 facing away from the third surface CS3. The second surface CS2 of the transmissive pattern 330 and the wavelength conversion patterns 340 and 350 and the fourth surface CS4 of the color filters 361, 363, and 365 may face each other, and the first cover layer 391 is disposed between the second surface CS2 and the fourth surface CS4. In addition, the first surface CS1 (e.g., the surface facing the first display substrate 100) of the transmissive pattern 330 and the wavelength conversion patterns 340 and 350 may be the surface on which light emitted from the first display substrate 100 is incident.

[0241] The transmissive pattern 330 and the wavelength conversion patterns 340 and 350 may include at least one surface that is at least partially curved. According to an embodiment, the transmissive pattern 330 and the wavelength conversion patterns 340 and 350 may have a shape in which one surface (e.g., the first surface CS1) facing the first display substrate 100 is at least partially curved. As Figure 9 and Figure 10 shown, in the transmissive pattern 330 and the first wavelength conversion pattern 340, the first surface CS1 facing the first display substrate 100 may include a curved surface. The first surface CS1 may have a shape in which a central portion of the first surface CS1 is recessed toward the second substrate 310 or the second surface CS2 compared to both sides of the first surface CS1 in contact with the partition wall 380. The curved surface of the first surface CS1 may have a central curvature positioned on the side of the first display substrate 100 facing the transmissive pattern 330 and the wavelength conversion patterns 340 and 350. Such a shape may be formed to include a surface in which the first surface CS1 is recessed thereon by adjusting process conditions of a process for drying ink in a process of forming the transmissive pattern 330 and the wavelength conversion patterns 340 and 350. However, the exemplary embodiments are not limited thereto.

[0242] The light L1 of the first color emitted from the first display substrate 100 may travel toward the second display substrate 300 and may be provided to the first surface CS1 that is a surface of the transmissive pattern 330 and the first wavelength conversion pattern 340. As at least Figure 9 and Figure 10 shown, when the first surface CS1 that is a surface of the transmissive pattern 330 and the first wavelength conversion pattern 340 has a curved surface such that the central portion has a shape recessed toward the second substrate 310 or the second surface CS2 (for example, when the central portion of the first surface CS1 has a shape recessed in the direction in which the light L1 of the first color emitted from the first display substrate 100 travels), the absorption area of the emitted light provided from the first display substrate 100 may be increased. In addition, with the first surface CS1 as a boundary, the diffuse reflection of the emitted light incident on the transmissive pattern 330 and the wavelength conversion patterns 340 and 350 may be increased, and the amount of light incident again on the transmissive pattern 330 and the wavelength conversion patterns 340 and 350 may be increased compared to the amount of light traveling toward the first display substrate 100. In the display device 1 according to the embodiment, the transmissive pattern 330 and the wavelength conversion patterns 340 and 350 of the second display substrate 300 may include curved surfaces, and thus, the luminance of the light emitted from the first display substrate 100 and emitted through the second display substrate 300 may be improved.

[0243] In an exemplary embodiment, among the distances between the first surface CS1 and the second surface CS2 of the transmissive pattern 330 and the wavelength conversion patterns 340 and 350, a first distance HA1 measured in the central portion spaced apart from the partition wall 380 between the first surface CS1 and the second surface CS2 may be smaller than a second distance HA2 measured on the side surface where the transmissive pattern 330 and the wavelength conversion patterns 340 and 350 contact the partition wall 380.

[0244] In order to absorb incident light over a large area, the first surface CS1 of the transmissive pattern 330 and the wavelength conversion patterns 340 and 350 may include a surface in which the central portion thereof is recessed toward the second substrate 310 or the second surface CS2. In contrast, the second surface CS2 faces the fourth surface CS4 of the color filters 361, 363, and 365 and thus may be formed corresponding to the fourth surface CS4. The color filters 361, 363, and 365 are directly provided on the second substrate 310, and thus, the third surface CS3 and the fourth surface CS4 may form surfaces parallel to the second substrate 310. As at least Figure 9 and Figure 10As shown, in the second substrate 310 according to an embodiment, a fourth distance HA4 of a portion where the color filters 361, 363, and 365 are disposed may be equal to a fifth distance HA5 of a portion where the light blocking member 320 is disposed. For example, the second substrate 310 may form a flat surface on which the color filters 361, 363, and 365 are provided. Since the second substrate 310 may form a flat surface, the third surface CS3 and the fourth surface CS4 of the color filters 361, 363, and 365 may form a substantially flat surface. For example, in the color filters 361, 363, and 365, a third distance HA3 between the third surface CS3 and the fourth surface CS4 may be constant regardless of the position. However, it should be noted that a portion of the color filters 361, 363, and 365 that overlaps with a portion of the light blocking member 320 may not be as thick as the third distance HA3.

[0245] In contrast, in the light-transmitting pattern 330 and the wavelength conversion patterns 340 and 350, the second surface CS2 forms a flat surface along the fourth surface CS4 of the color filters 361, 363, and 365, and the first surface CS1 includes a curved surface such that a distance between the first surface CS1 and the second surface CS2 of the light-transmitting pattern 330 and the wavelength conversion patterns 340 and 350 may vary according to the position. In some embodiments, among the distances between the first surface CS1 and the second surface CS2, a first distance HA1 measured in a central portion thereof may be smaller than a second distance HA2 measured on both sides or at edges thereof.

[0246] However, the exemplary embodiments are not limited thereto. In some embodiments, one surface of the second substrate 310 on which the color filters 361, 363, and 365 are provided may include a partially recessed portion, the third surface CS3 and the fourth surface CS4 of the color filters 361, 363, and 365 and the second surface CS2 of the light-transmitting pattern 330 and the wavelength conversion patterns 340 and 350 may include curved surfaces, and the second surface CS2 of the light-transmitting pattern 330 and the wavelength conversion patterns 340 and 350 may be parallel to the fourth surface CS4 of the color filters 361, 363, and 365. In this case, in the light-transmitting pattern 330 and the wavelength conversion patterns 340 and 350, the distance between the first surface CS1 and the second surface CS2 may be constant regardless of the position. A more detailed description thereof will be described later.

[0247] As at least in Figure 9 and Figure 10As can be seen, a part of the light L1 of the first color emitted from the first display substrate 100 may be incident on the first wavelength conversion pattern 340, may be scattered by the second scatterer 343, or may be converted by the first wavelength conversion material 345 into light of another color (e.g., light L2 of the second color). A part of the light L1 of the first color incident on the first wavelength conversion pattern 340 may be incident on the second color filter 363 in the first color, and another part of the light L1 of the first color may be converted into the light L2 of the second color and incident on the second color filter 363. The second color filter 363 may block the transmission of light other than the light L2 of the second color, and may emit the light L2 of the second color through the second substrate 310. Accordingly, the second light-transmitting region TA2 of the second display substrate 300 may display the light L2 of the second color.

[0248] In addition, a part of the light L1 of the first color emitted from the first display substrate 100 may be incident on the second wavelength conversion pattern 350, and a part of the incident light may be converted by the second wavelength conversion material 355 into light L3 of a third color. In addition, the third color filter 365 may block the transmission of light other than the light L3 of the third color, and may emit the light L3 of the third color through the second substrate 310. Accordingly, the third light-transmitting region TA3 of the second display substrate 300 may display the light L3 of the third color.

[0249] Referring again to Figure 8 , the partition wall 380 may be provided on one surface of the second substrate 310. The partition wall 380 may be provided on the light-blocking member 320 and positioned in the light-blocking region BA, and may overlap with the non-light-emitting region NLA of the first display substrate 100. The partition wall 380 may be provided to surround the first light-transmitting region TA1, the second light-transmitting region TA2, the third light-transmitting region TA3, the fourth light-transmitting region TA4, the fifth light-transmitting region TA5, and the sixth light-transmitting region TA6, and the planar shape of the partition wall 380 may form a lattice pattern.

[0250] In some embodiments, the first wavelength conversion pattern 340, the second wavelength conversion pattern 350, and the light-transmitting pattern 330 may be formed by an inkjet method using an ink composition. The partition wall 380 may serve as a guide for stably placing the ink composition for forming the first wavelength conversion pattern 340, the second wavelength conversion pattern 350, and the light-transmitting pattern 330 at a desired position.

[0251] For example, the partition wall 380 may be positioned not only between the first wavelength conversion pattern 340 and the second wavelength conversion pattern 350, but also between the second wavelength conversion pattern 350 and the light transmissive pattern 330. The partition wall 380 may prevent color mixing between different light transmissive regions TA positioned adjacent to each other. In other words, the partition wall 380 may be superimposed on the light blocking region BA to prevent color mixing between adjacent light transmissive regions TA, and may prevent ink from overflowing into adjacent light transmissive regions TA during the processes of forming the first wavelength conversion pattern 340, the second wavelength conversion pattern 350, and the light transmissive pattern 330.

[0252] As described above, when the light transmissive pattern 330, the first wavelength conversion pattern 340, and the second wavelength conversion pattern 350 extend from the second substrate 310 in the second direction DR2 and are arranged in a bar shape, such as Figure 14 and Figure 15 shown in, the partition wall 380 may not be provided in (or on) the portion of the seventh light blocking region BA7 positioned between the first row RT1 and the second row RT2 of the second display substrate 300. However, the exemplary embodiments are not limited thereto. When the light transmissive pattern 330, the first wavelength conversion pattern 340, and the second wavelength conversion pattern 350 are arranged in an island form, the partition wall 380 may even be provided in (or on) the seventh light blocking region BA7.

[0253] In some embodiments, the partition wall 380 may be formed of an organic material, and may also be formed of a photosensitive organic material. The photosensitive organic material may be, but is not limited to, a negative photosensitive material that is cured at the portion where light is applied thereto. In some embodiments, the partition wall 380 may further include a light blocking material, and may be positioned in the light blocking region BA to block light transmission.

[0254] The second cover layer 393 may be provided on the light transmissive pattern 330, the first wavelength conversion pattern 340, the second wavelength conversion pattern 350, and the partition wall 380. The second cover layer 393 may cover and encapsulate the light transmissive pattern 330, the first wavelength conversion pattern 340, the second wavelength conversion pattern 350, and the partition wall 380. Accordingly, it is possible to prevent the light transmissive pattern 330, the first wavelength conversion pattern 340, and the second wavelength conversion pattern 350 from being damaged and / or contaminated due to the penetration of external impurities such as moisture and air. In some embodiments, the second cover layer 393 may be made of an inorganic material. In some embodiments, the second cover layer 393 may be made of the same material as the first cover layer 391, or may include at least one of the materials mentioned in the description of the first cover layer 391. However, the exemplary embodiments are not limited thereto.

[0255] As described above, the filler 700 may be positioned in the space between the second display substrate 300 and the first display substrate 100. In some embodiments, the filler 700 may be positioned between the second capping layer 393 and the thin film encapsulation layer 170. In some embodiments, the filler 700 may be in direct contact with the second capping layer 393.

[0256] Hereinafter, a method of manufacturing the display device 1 will be described with reference to the respective drawings, and specifically, a method of manufacturing the second display substrate 300 will be described.

[0257] Figures 17 to 22 are cross-sectional views showing the display device at various stages of manufacture according to various exemplary embodiments.

[0258] Figures 17 to 22 Schematically shows the stages of a process of manufacturing the second display substrate 300 of the display device 1. Hereinafter, only the first light-transmitting region TA1, the second light-transmitting region TA2, and the third light-transmitting region TA3 will be shown and described; however, the following description can be equivalently applied to other light-transmitting regions TA, for example, the fourth light-transmitting region TA4, the fifth light-transmitting region TA5, and the sixth light-transmitting region TA6.

[0259] Refer to Figure 17 , a light-blocking member 320 is formed on one surface of the second substrate 310. The light-blocking member 320 may be formed in a region that overlaps each light-blocking region BA. Since the description of the arrangement of the respective portions of the light-blocking member 320 is the same as that described above, a detailed description thereof will be omitted. The light-blocking member 320 may be formed by coating a photosensitive organic material and exposing and developing the photosensitive organic material. However, the exemplary embodiments are not limited thereto.

[0260] Refer to Figure 18 , color filters 361, 363, and 365 are formed on one surface of the second substrate 310. The color filters 361, 363, and 365 may be formed in a region that overlaps each light-transmitting region TA between the portions of the light-blocking member 320. The color filters 361, 363, and 365 may be formed by coating a photosensitive organic material including a color material of a specific color and exposing and developing the photosensitive organic material. Illustratively, the first color filter 361 may be formed by coating a photosensitive organic material including a color material of blue and exposing and developing the photosensitive organic material; the second color filter 363 may be formed by coating a photosensitive organic material including a color material of green and exposing and developing the photosensitive organic material; the third color filter 365 may be formed by coating a photosensitive organic material including a color material of red and exposing and developing the photosensitive organic material.

[0261] Refer to Figure 19, a first cover layer 391 can be formed to cover the first color filter 361, the second color filter 363, and the third color filter 365, and a partition wall 380 can be formed between the plurality of color filters 361, 363, and 365. The arrangement or shape of the partition wall 380 and the first cover layer 391 is the same as the arrangement or shape described above.

[0262] Referring to Figure 20 and Figure 21 , a light-transmitting pattern 330 is formed by a first jetting process 330set of jetting ink into the first light-transmitting region TA1 and a first drying process dry1 of drying the ink, a first wavelength-converting pattern 340 is formed by a second jetting process 340set of jetting ink into the second light-transmitting region TA2 and the first drying process dry1 of drying the ink, and a second wavelength-converting pattern 350 is formed by a third jetting process 350set of jetting ink into the third light-transmitting region TA3 and the first drying process dry1 of drying the ink. The light-transmitting pattern 330, the first wavelength-converting pattern 340, and the second wavelength-converting pattern 350 can be formed in regions surrounded by the partition wall 380, respectively.

[0263] As described above, in the light-transmitting pattern 330 and the wavelength-converting patterns 340 and 350, a first surface CS1 as a surface facing the first display substrate 100 can include a curved surface. The shape of the first surface CS1 can be formed by changing the process conditions of the first drying process dry1 of drying the ink jetted between the partition walls 380.

[0264] For example, as described above, the partition wall 380 can be made of an organic material, and can be made of, for example, a hydrophobic organic material (such as polyimide (PI)). Here, when the surface material of the partition wall 380 is modified to be hydrophilic by ultraviolet (UV) radiation or the like, the attraction between the ink jetted between the partition walls 380 and the partition wall 380 increases. Then, when the process of drying the ink is performed, as shown in at least Figure 21 , the first surface CS1 of the light-transmitting pattern 330 and the wavelength-converting patterns 340 and 350 can be formed to have a shape in which some regions are recessed toward the second surface CS2. In addition, when drying the ink, if the first drying process dry1 is slowly performed at a relatively low temperature, the interaction between the surface-modified partition wall 380 and the ink can occur more strongly, and the first surface CS1 of the light-transmitting pattern 330 and the wavelength-converting patterns 340 and 350 can have a recessed shape with a greater curvature. However, the exemplary embodiments are not limited thereto.

[0265] As Figure 22As shown, the second cover layer 393 may be formed to cover the light-transmitting pattern 330, the first wavelength conversion pattern 340, the second wavelength conversion pattern 350, and the partition wall 380. The first display substrate 100 may be attached to the second display substrate 300, and the filler 700 may be formed between the first display substrate 100 and the second display substrate 300 to form the display device 1.

[0266] Hereinafter, the second display substrate of a display device according to some exemplary embodiments will be described.

[0267] Figure 23 is a schematic cross-sectional view of a display device according to some exemplary embodiments. Figure 24 is according to some exemplary embodiments of Figure 23 an enlarged cross-sectional view of a part QM3 in

[0268] Referring to Figure 23 and Figure 24 In the second display substrate 300_1 of the display device 1_1 according to an embodiment, the first surface CS1_1 and the second surface CS2_1 of the light-transmitting pattern 330_1 and the wavelength conversion patterns 340_1 and 350_1 may each include a partially curved surface. In the second display substrate 300_1, a region of one surface of the second substrate 310_1 corresponding to the light-transmitting region TA is partially recessed, and the color filters 361_1, 363_1, and 365_1, the light-transmitting pattern 330_1, and the wavelength conversion patterns 340_1 and 350_1 may be disposed in the recessed region. Accordingly, the light-transmitting pattern 330_1, the wavelength conversion patterns 340_1 and 350_1, and the color filters 361_1, 363_1, and 365_1 may include curved surfaces corresponding to the recessed region of the second substrate 310_1. In this manner, the display device 1_1 differs from the display device 1 in that the light-transmitting pattern 330_1, the wavelength conversion patterns 340_1 and 350_1, and the color filters 361_1, 363_1, and 365_1 may further include curved surfaces according to the shape of the second substrate 310_1 of the second display substrate 300_1. In the following description, redundant descriptions will be omitted, and the differences will be mainly described.

[0269] In Figure 23In the second display substrate 300_1, the second substrate 310_1 may include a surface recessed corresponding to the light-transmitting region TA. On one surface of the second substrate 310_1, a light-blocking region BA where the light-blocking member 320_1 is disposed may form a flat surface, and the light-transmitting region TA where the color filters 361_1, 363_1, and 365_1 are arranged may be partially recessed to form a curved surface. Such a shape of the second substrate 310_1 may be formed by a process of partially etching one surface of the second substrate 310_1 (or alternatively patterning one surface of the second substrate 310_1) in the process of manufacturing the display device 1_1. According to an embodiment, the second substrate 310_1 may have a fourth distance HA4 measured in relation to the light-transmitting region TA that may be smaller than a fifth distance HA5 measured in relation to the light-blocking region BA. However, the exemplary embodiments are not limited thereto.

[0270] The color filters 361_1, 363_1, and 365_1 are disposed corresponding to the light-transmitting region TA of one surface of the second substrate 310_1. As described above, the color filters 361_1, 363_1, and 365_1 may include a third surface CS3_1 as one surface in contact with the second substrate 310_1 and a fourth surface CS4_1 facing away from the third surface CS3_1. The third surface CS3_1 may have a curved surface formed along the recessed region of the second substrate 310_1, and the fourth surface CS4_1 facing away from the third surface CS3_1 may also have a curved surface formed along the recessed region of the second substrate 310_1. Different from the second display substrate 300 showing its embodiment in Figure 8 In the second display substrate 300_1 showing its embodiment in Figure 23 and Figure 24 at least one surface of the color filters 361_1, 363_1, and 365_1 may include a curved surface.

[0271] However, as similarly described above with reference to Figure 8 and the color filters 361, 363, and 365, the color filters 361_1, 363_1, and 365_1 may be substantially the same as each other, regardless of the position of the third distance HA3 between the third surface CS3_1 and the fourth surface CS4_1. The shapes of the third surface CS3_1 and the fourth surface CS4_1 of the color filters 361_1, 363_1, and 365_1 may change according to the shape of the surface of the second substrate 310_1 on which the color filters 361_1, 363_1, and 365_1 are disposed, and the third distance HA3 between the third surface CS3_1 and the fourth surface CS4_1 may remain constant, regardless of the shapes of the third surface CS3_1 and the fourth surface CS4_1. Although Figure 24Only the light-transmitting pattern 330_1 is shown, but the description of the light-transmitting pattern 330_1 can even be equivalently applied to the first wavelength conversion pattern 340_1 and the second wavelength conversion pattern 350_1.

[0272] The light-transmitting pattern 330_1 and the wavelength conversion patterns 340_1 and 350_1 may be respectively disposed on the color filters 361_1, 363_1, and 365_1. As described above, the light-transmitting pattern 330_1 and the wavelength conversion patterns 340_1 and 350_1 may include a first surface CS1_1 that is one surface facing the first display substrate 100 and a second surface CS2_1 that faces away from the first surface CS1_1 and faces the color filters 361_1, 363_1, and 365_1. According to an embodiment, the second surface CS2_1 may have a curved surface formed along the shape of the fourth surface CS4_1 of the color filters 361_1, 363_1, and 365_1, and the first surface CS1_1 facing away from the second surface CS2_1 may also have a curved surface formed along the shape of the fourth surface CS4_1 of the color filters 361_1, 363_1, and 365_1. Thus, at least a part of the second surface CS2_1 may protrude toward the color filters 361_1, 363_1, and 365_1 to form a curved surface. Different from the second display substrate 300, in the second display substrate 300_1, at least one of the second surfaces CS2_1 of the light-transmitting pattern 330_1 and the wavelength conversion patterns 340_1 and 350_1 may include a curved surface. The centers of curvature of the first surface CS1_1 and the second surface CS2_1 of the light-transmitting pattern 330_1 and the wavelength conversion patterns 340_1 and 350_1 and the fourth surface CS4_1 of the color filters 361_1, 363_1, and 365_1 are disposed between the light-transmitting pattern 330_1 and the wavelength conversion patterns 340_1 and 350_1 and the first display substrate 100, and the centers of curvature of the third surface CS3_1 of the color filters 361_1, 363_1, and 365_1 are disposed between the color filters 361_1, 363_1, and 365_1 and the first display substrate 100.

[0273] The curved surfaces of the first surface CS1_1 and the second surface CS2_1 may have substantially the same curvature. In the second display substrate 300, in the case of the light-transmitting pattern 330 and the wavelength conversion patterns 340 and 350, the curvature of the curved surface of the first surface CS1 may vary according to the process conditions of the first drying process dry1 performed in the process of manufacturing the second display substrate 300. In contrast, in the second display substrate 300_1, the first surface CS1_1 of the light-transmitting pattern 330_1 and the wavelength conversion patterns 340_1 and 350_1 may be formed to be partially recessed toward the second substrate 310_1 or the second surface CS2_1 according to the shape of the curved surface of the second surface CS2_1. Therefore, the curvatures of the curved surfaces of the first surface CS1_1 and the second surface CS2_1 of the light-transmitting pattern 330_1 and the wavelength conversion patterns 340_1 and 350_1 may be substantially the same as each other. In addition, among the distances between the first surface CS1_1 and the second surface CS2_1, a first distance HA1, which is a distance measured in the central portion of the light-transmitting area TA, may be substantially the same as a second distance HA2, which is a distance measured on both sides of the light-transmitting area TA or at the edge of the light-transmitting area TA. Even in the case of the second display substrate 300_1, in the light-transmitting pattern 330_1 and the wavelength conversion patterns 340_1 and 350_1, the first surface CS1_1 on which the light provided from the first display substrate 100 is incident may include a curved surface, and thus, the absorption area of the incident light may be increased. The description thereof is the same as the description referred to above with respect to at least Figure 8 and Figure 9 the description described.

[0274] Hereinafter, a process of manufacturing the display device 1_1 (an embodiment of the display device 1_1 is shown in Figure 23 will be described with reference to the respective drawings, specifically, a process of manufacturing the second display substrate 300_1.

[0275] Figures 25 to 28 is a cross-sectional view showing the display device according to various exemplary embodiments Figure 23 at various stages of manufacture.

[0276] Referring to Figure 25 , a part of one surface of the second substrate 310_1 is etched to form a recessed portion CP, and a light-blocking member 320_1 is formed on the one surface of the second substrate 310_1. In one surface of the second substrate 310_1, a region corresponding to the light-transmitting area TA may have a partially recessed shape. As Figure 25As shown, a recessed portion CP in which one surface of the second substrate 310_1 is recessed can be formed in the light-transmitting region TA. In one surface of the second substrate 310_1, a first recessed portion CP1 can be formed corresponding to the first light-transmitting region TA1, a second recessed portion CP2 can be formed corresponding to the second light-transmitting region TA2, and a third recessed portion CP3 can be formed corresponding to the third light-transmitting region TA3. In contrast, on the second substrate 310_1, light-blocking regions BA (e.g., the first light-blocking region BA1, the second light-blocking region BA2, and the third light-blocking region BA3) positioned between the light-transmitting regions TA can form a flat surface on the non-recessed surface of the second substrate 310_1. A plurality of portions of the light-blocking member 320_1 can be formed on the flat surface of the light-blocking region BA.

[0277] Referring to Figure 26 , color filters 361_1, 363_1, and 365_1 are formed on the recessed portion CP of one surface of the second substrate 310_1. The color filters 361_1, 363_1, and 365_1 can be disposed in the corresponding light-transmitting regions TA and can be formed corresponding to the recessed portion CP formed on one surface of the second substrate 310_1. Thus, as described above, the third surface CS3_1 and the fourth surface CS4_1 of the color filters 361_1, 363_1, and 365_1 can include curved surfaces.

[0278] A first capping layer 391_1 is formed to cover the first color filter 361_1, the second color filter 363_1, and the third color filter 365_1, and a partition wall 380 is formed between the plurality of color filters 361_1, 363_1, and 365_1 (see Figure 27 ). The arrangement or shape of the partition wall 380 and the first capping layer 391_1 is the same as the arrangement or shape described above in connection with, for example, Figure 23 and Figure 24 .

[0279] Referring to Figure 27 and Figure 28, a light-transmitting pattern 330_1 is formed by a first jetting process 330set that jets ink onto a first light-transmitting region TA1 and a second drying process dry2 that dries the ink, a first wavelength-converting pattern 340_1 is formed by a second jetting process 340set that jets ink onto a second light-transmitting region TA2 and the second drying process dry2 that dries the ink, and a second wavelength-converting pattern 350_1 is formed by a third jetting process 350set that jets ink onto a third light-transmitting region TA3 and the second drying process dry2 that dries the ink. The light-transmitting pattern 330_1, the first wavelength-converting pattern 340_1, and the second wavelength-converting pattern 350_1 may be formed in regions surrounded by partition walls 380, respectively.

[0280] As described above, the light-transmitting pattern 330_1 and the wavelength-converting patterns 340_1 and 350_1 may each include a first surface CS1_1 and a second surface CS2_1 that both include curved surfaces according to the shapes of color filters 361_1, 363_1, and 365_1. The second drying process dry2 for forming the light-transmitting pattern 330_1 and the wavelength-converting patterns 340_1 and 350_1 may be performed under process conditions different from those of the first drying process dry1.

[0281] As described in relation to Figure 21 Since the ink for forming the light-transmitting pattern 330 and the wavelength-converting patterns 340 and 350 is jetted onto a flat fourth surface CS4 of the color filters 361, 363, and 365, the process of drying the ink may be used to form a curved surface on a first surface CS1 of the light-transmitting pattern 330 and the wavelength-converting patterns 340 and 350. In contrast, as described in relation to Figure 28 Since the ink for forming the light-transmitting pattern 330_1 and the wavelength-converting patterns 340_1 and 350_1 is jetted onto a curved fourth surface CS4_1 of the color filters 361_1, 363_1, and 365_1, even when the second drying process dry2 is performed under normal process conditions, the first surface CS1_1 of the light-transmitting pattern 330_1 and the wavelength-converting patterns 340_1 and 350_1 may have a curved surface formed thereon. In an exemplary embodiment, the process conditions of the second drying process dry2 may be different from those of the first drying process dry1.

[0282] A second cover layer 393 may be formed to cover the light-transmitting pattern 330_1, the first wavelength conversion pattern 340_1, the second wavelength conversion pattern 350_1, and the partition wall 380. To this end, the first display substrate 100 may be attached to the second display substrate 300_1, and the filler 700 is disposed between the first display substrate 100 and the second display substrate 300_1 to thereby form the display device 1_1.

[0283] In some exemplary embodiments, the second display substrate (such as the second display substrate 300 of the display device 1) may further include a color pattern disposed on the light-blocking region BA to improve color reproducibility.

[0284] Figure 29 and Figure 30 are schematic cross-sectional views of display devices according to various exemplary embodiments.

[0285] Referring to Figure 29 , the second display substrate 300_2 of the display device 1_2 according to some embodiments may further include a color pattern 329_2 disposed in (or on) the light-blocking region BA and disposed between the second substrate 310 and the light-blocking member 320_2. The second display substrate 300_2 is different from the second display substrate 300 in that the second display substrate 300_2 further includes the color pattern 329_2. Hereinafter, redundant descriptions will be omitted, and the differences will be mainly described.

[0286] The second display substrate 300_2 may include a color pattern 329_2 disposed in the light-blocking region BA on one surface of the second substrate 310. The color pattern 329_2 may be formed in a pattern substantially the same as the pattern of a portion of the light-blocking member 320_2 and may be disposed between the portion of the light-blocking member 320_2 and the second substrate 310. For example, in some embodiments, the color pattern 329_2 may be disposed in the first light-blocking region BA1, the second light-blocking region BA2, the third light-blocking region BA3, the fourth light-blocking region BA4, the fifth light-blocking region BA5, the sixth light-blocking region BA6, and the seventh light-blocking region BA7. The thickness of the color pattern 329_2 may be greater than the thickness of each portion of the light-blocking member 320_2, but the exemplary embodiments are not limited thereto.

[0287] The color pattern 329_2 may absorb a part of the light flowing into the second display substrate 300_2 from the outside of the display device 1_2 to reduce the reflected light caused by external light. Therefore, the display device 1_2 may reduce the color distortion caused by external light. In some embodiments, the color pattern 329_2 may include a blue colorant such as a blue dye and / or a blue pigment. For example, the color pattern 329_2 may be made of the same material as the material of the first color filter 361.

[0288] Since the color pattern 329_2 may include the same material as the material of the first color filter 361_2, in some embodiments, the first color filter 361_2 may be integrated with the color pattern 329_2.

[0289] Referring to Figure 30 , in the second display substrate 300_3 according to an embodiment, the first color filter 361_3 may be integrated with the color pattern 329_3. Thus, both sides of the first color filter 361_3 may be positioned in the light blocking region BA. The second display substrate 300_3 is different from the second display substrate 300_2 in that the first color filter 361_3 is integrated with a part of the color pattern 329_3. Hereinafter, descriptions that are repetitive with the descriptions described with reference to Figure 29 will be omitted, and the differences will be mainly described.

[0290] In the second display substrate 300_3 according to an embodiment, since the color pattern 329_3 includes the same material as the material of the first color filter 361_3, the color pattern 329_3 may absorb a part of the light introduced from the outside to reduce the reflected light due to the external light. In this case, the thickness of the first color filter 361_3 may be substantially the same as the thickness of the color pattern 329_3. In some embodiments, the first color filter 361_3 may be formed simultaneously with the color pattern 329_3. Therefore, one process step may be omitted in the process of manufacturing the second display substrate 300_3, thereby improving production efficiency.

[0291] The first color filter 361_3 may be disposed in the first light transmissive region TA1, and may also be disposed in the light blocking region BA (for example, the first light blocking region BA1 and the third light blocking region BA3 positioned on both sides of the first color filter 361_3). In addition, the first color filter 361_3 may be in direct contact with color filters disposed in adjacent light transmissive regions TA (for example, the second color filter 363_3 disposed in the second light transmissive region TA2 and the third color filter 365_3 disposed in the third light transmissive region TA3). Different from the second display substrate 300, the first color filter 361_3 may be in contact with the second color filter 363_3 and the third color filter 365_3 at the boundary between the light blocking region BA and the light transmissive region TA without being spaced apart from the second color filter 363_3 and the third color filter 365_3.

[0292] In addition, since the first color filter 361_3 and the color pattern 329_3 are integrated, some of the portions of the light blocking member 320_3 disposed on the color pattern 329_3 can be disposed on the first color filter 361_3. For example, in the case of the second light blocking member 322_3 disposed in the second light blocking region BA2, the second light blocking member 322_3 can be disposed between the second color filter 363_3 and the color pattern 329_3 and between the third color filter 365_3 and the color pattern 329_3. For example, in the second light blocking region BA2, the color pattern 329_3, the second light blocking member 322_3, and the second color filter 363_3 or the third color filter 365_3 can be sequentially disposed based on one surface of the second substrate 310.

[0293] In contrast, in the first light blocking region BA1 and the third light blocking region BA3 in which a part of the first color filter 361_3 is disposed, the first light blocking member 321_3 or the third light blocking member 323_3 can be disposed between the first color filter 361_3 and the second color filter 363_3 or between the first color filter 361_3 and the third color filter 365_3. For example, in the first light blocking region BA1, the first color filter 361_3, the first light blocking member 321_3, and the second color filter 363_3 can be sequentially disposed based on one surface of the second substrate 310, and in the third light blocking region BA3, the first color filter 361_3, the third light blocking member 323_3, and the third color filter 365_3 can be sequentially disposed based on one surface of the second substrate 310. In this configuration, since the first color filter 361_3 and the color pattern 329_3 are integrated, the first color filter 361_3 and the color pattern 329_3 can be formed in the same process, and the light blocking member 320_3 can be formed in a subsequent process.

[0294] As described above, in some embodiments, the first color filter 361, the second color filter 363, and the third color filter 365 may not be disposed in the seventh light blocking region BA7. For example, the first color filter 361, the second color filter 363, and the third color filter 365 disposed in the first row RT1 may be spaced apart from the first color filter 361, the second color filter 363, and the third color filter 365 disposed in the second row RT2. In this case, the partition wall 380 disposed in the seventh light blocking region BA7 may not overlap with the first color filter 361, the second color filter 363, and the third color filter 365.

[0295] Figure 31 is a schematic plan view showing an arrangement structure of a first color filter, a second color filter, and a third color filter in a second display substrate according to some exemplary embodiments.

[0296] Referring toFigure 31 , according to an embodiment, the first color filter 361_4, the second color filter 363_4, and the third color filter 365_4 may be disposed corresponding to each light-transmitting region TA without extending into an adjacent light-transmitting region TA along the second direction DR2. For example, the first color filter 361_4, the second color filter 363_4, and the third color filter 365_4 may be arranged in an island shape. Accordingly, the color filters 361_4, 363_4, and 365_4 may be partially removed on the seventh light-blocking region BA7 of the second substrate 310 and may be spaced apart from the color filters 361_4, 363_4, and 365_4 disposed in the light-transmitting regions TA adjacent along the second direction DR2. The second display substrate 300_4 according to some embodiments is different from the second display substrate 300 in that the first color filter 361_4, the second color filter 363_4, and the third color filter 365_4 are arranged in an island shape. In the following description, redundant descriptions will be omitted, and the differences will be mainly described.

[0297] According to an embodiment, the first color filter 361_4 may be disposed corresponding to the first light-transmitting region TA1 or the fourth light-transmitting region TA4, the second color filter 363_4 may be disposed corresponding to the second light-transmitting region TA2 or the fifth light-transmitting region TA5, and the third color filter 365_4 may be disposed corresponding to the third light-transmitting region TA3 or the sixth light-transmitting region TA6. However, since the first color filter 361_4, the second color filter 363_4, and the third color filter 365_4 may have an area larger than the area of each light-transmitting region TA in which the first color filter 361_4, the second color filter 363_4, and the third color filter 365_4 are disposed, some regions may be disposed in the light-blocking region BA. Regions in which the color filters 361_4, 363_4, and 365_4 are not disposed may be formed in the seventh light-blocking region BA7, and the partition wall 380 disposed in the seventh light-blocking region BA7 may extend along the first direction DR1.

[0298] In some embodiments, the light-transmitting pattern 330, the first wavelength conversion pattern 340, and the second wavelength conversion pattern 350 corresponding to each light-transmitting region TA may also be arranged in an island shape similar to the color filters 361_4, 363_4, and 365_4.

[0299] Figure 32 is a schematic plan view showing an arrangement structure of a first wavelength conversion pattern, a second wavelength conversion pattern, and a light-transmitting pattern in a second display substrate according to some exemplary embodiments.

[0300] Refer to Figure 32, in the second display substrate 300_4 according to an embodiment, the light-transmitting pattern 330_4, the first wavelength conversion pattern 340_4, and the second wavelength conversion pattern 350_4 may also be disposed corresponding to each light-transmitting region TA without extending along the second direction DR2. For example, the light-transmitting pattern 330_4, the first wavelength conversion pattern 340_4, and the second wavelength conversion pattern 350_4 may also be arranged in an island shape. Since the arrangements of the light-transmitting pattern 330_4, the first wavelength conversion pattern 340_4, and the second wavelength conversion pattern 350_4 described with reference to Figure 32 are substantially similar to the arrangements of the color filters 361_4, 363_4, and 365_4 described with reference to Figure 31 , a detailed description thereof will be omitted.

[0301] In some embodiments, the plurality of color filters 361, 363, and 365 may be arranged to be in contact with each other without being spaced apart from each other.

[0302] Figure 33 is a schematic cross-sectional view of a display device according to some exemplary embodiments.

[0303] Referring to Figure 33 , in the second display substrate 300_5 according to an embodiment, the plurality of color filters 361_5, 363_5, and 365_5 may be stacked on top of each other without being spaced apart from each other. Accordingly, any one of the color filters may have some regions positioned on another color filter. The second display substrate 300_5 is different from the second display substrate 300 in that the plurality of color filters 361_5, 363_5, and 365_5 are in contact with each other. In the following description, redundant descriptions will be omitted, and the differences will be mainly described.

[0304] As shown in Figure 33 , any one of the color filters (e.g., the first color filter 361_5) may be formed to partially overlap with other color filters (e.g., the second color filter 363_5 and the third color filter 365_5). In the first direction DR1, the third color filter 365_5 is disposed on one side of the first color filter 361_5, and the second color filter 363_5 is disposed on the other side of the first color filter 361_5. In the first direction DR1, one side of the second color filter 363_5 is disposed on the first color filter 361_5, and the third color filter 365_5 is disposed on the other side of the second color filter 363_5. In the first direction DR1, one side of the third color filter 365_5 is disposed on the second color filter 363_5, and the other side of the third color filter 365_5 is disposed on the first color filter 361_5.

[0305] Multiple color filters 361_5, 363_5, and 365_5 may be in contact with each other in an area where they are stacked on one another without being spaced apart from each other (such as in a part of the light blocking area BA). Accordingly, the first cover layer 391_5 may be disposed to cover the upper surfaces of the first color filter 361_5, the second color filter 363_5, and the third color filter 365_5 without contacting respective portions of the light blocking member 320_5. Such a structure may be achieved by forming the color filters 361_5, 363_5, and 365_5 to be not spaced apart from each other while sequentially forming the respective color filters 361_5, 363_5, and 365_5 during a process of manufacturing the second display substrate 300_5.

[0306] Figure 34 is a schematic cross-sectional view of a display device according to some exemplary embodiments.

[0307] Referring to Figure 34 , in the second display substrate 300_6 of the display device 1_6 according to an embodiment, the light-transmitting pattern 330_6 and the wavelength conversion patterns 340_6 and 350_6 may be formed by a photolithography process instead of an inkjet process. Accordingly, in the second display substrate 300_6, the second cover layer 393_6 may be disposed under the partition wall 380_6. When the light-transmitting pattern 330_6 and the wavelength conversion patterns 340_6 and 350_6 are formed by the photolithography process, the second cover layer 393_6 may be formed before the process of forming the partition wall 380_6.

[0308] The second cover layer 393_6 may be disposed to cover the light-transmitting pattern 330_6 and the wavelength conversion patterns 340_6 and 350_6. The second cover layer 393_6 may be in direct contact with the light-transmitting pattern 330_6, the wavelength conversion patterns 340_6 and 350_6, and the partition wall 380_6. In a process of manufacturing the second display substrate 300_6, the light-transmitting pattern 330_6 and the wavelength conversion patterns 340_6 and 350_6 are formed, and then the second cover layer 393_6 is formed to cover the light-transmitting pattern 330_6 and the wavelength conversion patterns 340_6 and 350_6. Since the light-transmitting pattern 330_6 and the wavelength conversion patterns 340_6 and 350_6 may be disposed to be spaced apart from each other based on the light blocking area BA, as Figure 34 shown, the partition wall 380_6 may be disposed in an area overlapping with the light blocking area BA. Different from that described in relation to Figure 8 , in the second display substrate 300_6, the partition wall 380_6 may be disposed on the second cover layer 393_6 that may also be in direct contact with the first cover layer 391_6.

[0309] Even when the light-transmitting pattern 330_6 and the wavelength conversion patterns 340_6 and 350_6 are formed by a photolithography process, at least one surface (e.g., a surface facing the first display substrate 100) may include a curved surface. Accordingly, the second cover layer 393_6 may have a curved shape along the curved surfaces of the light-transmitting pattern 330_6 and the wavelength conversion patterns 340_6 and 350_6. Since the other components are the same (or substantially the same) as the components described above with reference to Figure 8 The detailed description thereof will be omitted.

[0310] According to an embodiment, the first display substrate 100 of the display device 1 is not necessarily configured to emit only light L1 of a first color, but may be configured to emit light L2 of a second color and / or light L3 of a third color.

[0311] Figure 35 and Figure 36 are schematic cross-sectional views of display devices according to various exemplary embodiments.

[0312] Referring to Figure 35 According to an embodiment, the first display substrate 100_7 of the display device 1_7 may emit light of different colors for each light-emitting region LA. For example, in the first display substrate 100_7, the first light-emitting element ED1 disposed in the first light-emitting region LA1 may emit light L1 of a first color, the second light-emitting element ED2' disposed in the second light-emitting region LA2 may emit light L2 of a second color, and the third light-emitting element ED3'' disposed in the third light-emitting region LA3 may emit light L3 of a third color. Accordingly, the light-transmitting pattern 330_7 and the wavelength conversion patterns 340_7 and 350_7 disposed in the corresponding light-transmitting regions TA may be provided with light of different colors. The light L1 of the first color may be incident on the light-transmitting pattern 330_7 disposed in the first light-transmitting region TA1, the light L2 of the second color may be incident on the first wavelength conversion pattern 340_7 disposed in the second light-transmitting region TA2, and the light L3 of the third color may be incident on the second wavelength conversion pattern 350_7 disposed in the third light-transmitting region TA3.

[0313] As described above, each sub-pixel of the first display substrate 100_7 may include light-emitting elements 30 that are different from each other. The light-emitting elements 30 may emit light of different colors according to the type of their active layers 33. According to an exemplary embodiment, in the first display substrate 100_7, the light-emitting element 30 of the first sub-pixel PX1 may emit light L1 of a first color having a central wavelength band of 450 nm to 495 nm, the light-emitting element 30 of the second sub-pixel PX2 may emit light L2 of a second color having a central wavelength band of 495 nm to 570 nm, and the light-emitting element 30 of the third sub-pixel PX3 may emit light L3 of a third color having a central wavelength band of 620 nm to 750 nm. Accordingly, light L1 of the first color may be emitted from the first light-emitting region LA1 of the first display substrate 100_7, light L2 of the second color may be emitted from the second light-emitting region LA2 of the first display substrate 100_7, and light L3 of the third color may be emitted from the third light-emitting region LA3 of the first display substrate 100_7.

[0314] In this case, in the first wavelength conversion pattern 340_7 and the second wavelength conversion pattern 350_7 disposed in the second light-transmitting region TA2 and the third light-transmitting region TA3, optical conversion due to the wavelength conversion materials 345 and 355 may not occur. Only the light of the colors transmitted by the color filters 361_7, 363_7, and 365_7 may be incident on the color filters 361_7, 363_7, and 365_7 disposed in the corresponding light-transmitting regions TA, thereby further improving the color purity of the display device 1_7.

[0315] According to some exemplary embodiments, the display device may not have to emit light of different colors for each light-emitting region LA. In some embodiments, some light-emitting regions LA may emit light of the same color.

[0316] Referring to Figure 36, in the first display substrate 100_8 of the display device 1_8, the first light-emitting element ED1 disposed in the first light-emitting region LA1 can emit light L1 of a first color, the second light-emitting element ED2' disposed in the second light-emitting region LA2 can emit light L2 of a second color, and the third light-emitting element ED3 disposed in the third light-emitting region LA3 can emit light L1 of the first color. Thus, the light-transmitting pattern 330_8 and the wavelength conversion patterns 340_8 and 350_8 disposed in the corresponding light-transmitting regions TA can be provided with at least two different colors of light. The light L1 of the first color can be incident on the light-transmitting pattern 330_8 disposed in the first light-transmitting region TA1, the light L2 of the second color can be incident on the first wavelength conversion pattern 340_8 disposed in the second light-transmitting region TA2, and the light L1 of the first color can be incident on the second wavelength conversion pattern 350_8 disposed in the third light-transmitting region TA3. In this case, only the light L1 of the first color incident on the second wavelength conversion pattern 350_8 can cause an optical conversion through the second wavelength conversion material 355. Since other components are the same as the above-described components, detailed descriptions thereof will be omitted.

[0317] As described above, the first display substrate does not have to include an inorganic light-emitting diode and can include different types of self-luminous elements. In some embodiments, the first display substrate can be an organic light-emitting diode (OLED) or a liquid crystal display (LCD).

[0318] Hereinafter, a case where the first display substrate is an organic light-emitting diode (OLED) or a liquid crystal display (LCD) will be described with reference to the respective drawings.

[0319] Figure 37 is a schematic plan view showing a display region of a first display substrate according to some exemplary embodiments. Figure 38 is a schematic plan view showing a display region of a second display substrate according to some exemplary embodiments. Figure 39 is according to some exemplary embodiments along Figure 37 and Figure 38 a cross-sectional view of the display device taken along the section line X1-X1' in Figure 40 is according to some exemplary embodiments of Figure 39 a magnified cross-sectional view of the portion Q in

[0320] Figures 37 to 40 shows a case where the display device 1_9 includes an organic light-emitting diode (OLED) as the first display substrate 100_9. Figure 37 shows a display region DA of the first display substrate 100_9 including an organic light-emitting layer OL, Figure 38Shows the display area DA of the second display substrate 300_9 when the first display substrate 100_9 includes the organic light-emitting layer OL. In the following description, redundant descriptions will be omitted, and the differences (specifically, the organic light-emitting layer OL of the first display substrate 100_9) will be described in more detail.

[0321] Referring Figures 37 to 40 , when the first display substrate 100_9 is an organic light-emitting diode (OLED) including the organic light-emitting layer OL, the light-emitting areas LA of the first display substrate 100_9 may have different widths WL_9 from each other.

[0322] In some embodiments, the first width WL1_9 measured along the first direction DR1 of the first light-emitting area LA1 may be narrower than the width WL2_9 measured along the first direction DR1 of the second light-emitting area LA2, and may be narrower than the third width WL3_9 measured along the first direction DR1 of the third light-emitting area LA3. In addition, the second width WL2_9 of the second light-emitting area LA2 and the third width WL3_9 of the third light-emitting area LA3 may also be different from each other. Illustratively, the second width WL2_9 of the second light-emitting area LA2 may be wider than the third width WL3_9 of the third light-emitting area LA3. In some embodiments, the area of the first light-emitting area LA1 may be smaller than the area of the second light-emitting area LA2, and may be smaller than the area of the third light-emitting area LA3, and the area of the second light-emitting area LA2 may be larger than the area of the third light-emitting area LA3.

[0323] However, the exemplary embodiments are not limited thereto. In some cases, the area of the second light-emitting area LA2 may be smaller than the area of the third light-emitting area LA3. Although it is shown that in the first display substrate 100_9, the first light-emitting area LA1 has the narrowest width and the second light-emitting area LA2 has a width wider than that of the third light-emitting area LA3, the exemplary embodiments are not limited thereto. Except for this difference, the description of the light-emitting area LA of the first display substrate 100_9 is the same as that described above with reference to at least Figure 3 and Figure 4 described.

[0324] The light-transmitting area TA of the second display substrate 300_9 may be formed to substantially correspond to the light-emitting area LA of the first display substrate 100_9. When the first display substrate 100_9 is an organic light-emitting diode (OLED) including the organic light-emitting layer OL, the light-transmitting areas TA of the second display substrate 300_9 may have different widths WT_9 from each other.

[0325] In some embodiments, the widths WT_9 measured in the first direction DR1 of the first light-transmitting region TA1, the second light-transmitting region TA2, and the third light-transmitting region TA3 may have a similar relationship to the widths WL_9 measured in the first direction DR1 of the first light-emitting region LA1, the second light-emitting region LA2, and the third light-emitting region LA3. For example, the first width WT1_9 of the first light-transmitting region TA1 measured along the first direction DR1 may be narrower than the second width WT2_9 of the second light-transmitting region TA2 measured along the first direction DR1, and may be narrower than the third width WT3_9 of the third light-transmitting region TA3 measured along the first direction DR1. In addition, the second width WT2_9 of the second light-transmitting region TA2 and the third width WT3_9 of the third light-transmitting region TA3 may also be different from each other. Illustratively, the second width WT2_9 of the second light-transmitting region TA2 may be wider than the third width WT3_9 of the third light-transmitting region TA3.

[0326] In some embodiments, the area of the first light-transmitting region TA1 may be smaller than the area of the second light-transmitting region TA2, and may be smaller than the area of the third light-transmitting region TA3, and the area of the second light-transmitting region TA2 may be larger than the area of the third light-transmitting region TA3. The fourth light-transmitting region TA4, the fifth light-transmitting region TA5, and the sixth light-transmitting region TA6 adjacent to the first light-transmitting region TA1, the second light-transmitting region TA2, and the third light-transmitting region TA3 along the second direction DR2 may be substantially the same as the first light-transmitting region TA1, the second light-transmitting region TA2, and the third light-transmitting region TA3 in terms of width, area, the structure of components in the region, and the color of light emitted to the outside of the display device 1_9.

[0327] The first display substrate 100_9 may include an organic light-emitting layer OL and may have an arrangement structure different from the arrangement structures of the various embodiments described previously (such as those embodiments described previously in relation to at least Figure 8 the related ones). According to an embodiment, the first display substrate 100_9 may include first electrodes AE1, AE2, and AE3, a second electrode CE, and an organic light-emitting layer OL disposed between the first electrodes AE1, AE2, and AE3 and the second electrode CE, and may further include a pixel defining layer 150 disposed in the non-display region NDA of the first display substrate 100_9.

[0328] As Figure 39As shown, the first electrodes AE1, AE2, and AE3 can be disposed on the via layer 120 of the first display substrate 100_9. The first electrode AE1 disposed in the first light-emitting region LA1 can be positioned within the first light-emitting region LA1, but at least a portion of the first electrode AE1 can extend into the non-light-emitting region NLA (or into the non-light-emitting region NLA). The first electrode AE2 disposed in the second light-emitting region LA2 can be positioned within the second light-emitting region LA2, but at least a portion of the first electrode AE2 can extend into the non-light-emitting region NLA (or into the non-light-emitting region NLA). The first electrode AE3 disposed in the third light-emitting region LA3 can be positioned within the third light-emitting region LA3, but at least a portion of the first electrode AE3 can extend into the non-light-emitting region NLA (or into the non-light-emitting region NLA). The first electrode AE1 disposed in the first light-emitting region LA1 can be connected to the first switching element T1 through the via layer 120, the first electrode AE2 disposed in the second light-emitting region LA2 can be connected to the second switching element T2 through the via layer 120, and the first electrode AE3 disposed in the third light-emitting region LA3 can be connected to the third switching element T3 through the via layer 120.

[0329] In some embodiments, the widths or areas of the first electrodes AE1, AE2, and AE3 can be different from each other. Illustratively, the width of the first electrode AE1 disposed in the first light-emitting region LA1 can be smaller than the width of the first electrode AE2 disposed in the second light-emitting region LA2, the width of the first electrode AE2 disposed in the second light-emitting region LA2 can be larger than the width of the first electrode AE1 disposed in the first light-emitting region LA1, and can be larger than the width of the first electrode AE3 disposed in the third light-emitting region LA3. In some embodiments, the area of the first electrode AE1 disposed in the first light-emitting region LA1 can be smaller than the area of the first electrode AE3 disposed in the third light-emitting region LA3. However, the exemplary embodiments are not limited thereto. The area of the first electrode AE1 disposed in the first light-emitting region LA1 can be smaller than the area of the first electrode AE2 disposed in the second light-emitting region LA2, the area of the first electrode AE3 disposed in the third light-emitting region LA3 can be smaller than the area of the first electrode AE2 disposed in the second light-emitting region LA2, and can be larger than the area of the first electrode AE1 disposed in the first light-emitting region LA1. In some cases, the widths or areas of the first electrodes AE1, AE2, and AE3 can be substantially the same as each other.

[0330] Each of the first electrodes AE1, AE2, and AE3 may be a reflective electrode. In this case, each of the first electrodes AE1, AE2, and AE3 may be a metal layer including at least one metal such as Ag, Mg, Al, Pt, Pd, Au, Ni, Nd, Ir, and Cr. In some embodiments, each of the first electrodes AE1, AE2, and AE3 may further include a metal oxide layer deposited on the metal layer. In an exemplary embodiment, each of the first electrodes AE1, AE2, and AE3 may have a bilayer structure of ITO / Ag, Ag / ITO, ITO / Mg, or ITO / MgF2, or a multilayer structure of ITO / Ag / ITO, but the exemplary embodiment is not limited thereto.

[0331] The pixel defining layer 150 may be disposed on the first electrodes AE1, AE2, and AE3. The pixel defining layer 150 may include openings for exposing the first electrodes AE1, AE2, and AE3, and may define a first light emitting region LA1, a second light emitting region LA2, a third light emitting region LA3, and a non-light emitting region NLA. For example, the first light emitting region LA1 may be a region of the first electrode AE1 disposed in the first light emitting region LA1 that is exposed without being covered by the pixel defining layer 150. Similarly, the second light emitting region LA2 may be a region of the first electrode AE2 disposed in the second light emitting region LA2 that is exposed without being covered by the pixel defining layer 150, and the third light emitting region LA3 may be a region of the first electrode AE3 disposed in the third light emitting region LA3 that is exposed without being covered by the pixel defining layer 150. The non-light emitting region NLA may be a region where the pixel defining layer 150 is disposed.

[0332] In some embodiments, the pixel defining layer 150 may include an organic insulating material such as at least one of acrylic resin, epoxy resin, phenolic resin, polyamide resin, polyimide resin, unsaturated polyester resin, polyphenylene ether resin, polyphenylene sulfide resin, and benzocyclobutene (BCB).

[0333] In some embodiments, a portion of the pixel defining layer 150 may be disposed to overlap with the partition wall 380. Illustratively, as Figure 38 and Figure 39 shown, the pixel defining layer 150 may overlap with the partition wall 380 disposed in the light blocking region BA.

[0334] The organic light-emitting layer OL may be disposed on the first electrodes AE1, AE2, and AE3. In some embodiments, the organic light-emitting layer OL may have the shape of a continuous layer formed over a plurality of light-emitting regions LA1, LA2, LA3, LA4, LA5, and LA6 and non-light-emitting regions NLA. The organic light-emitting layer OL may emit light, and the light may be provided to the second display substrate 300. In some embodiments, the organic light-emitting layer OL may emit light L1 of a first color. A more detailed description of the organic light-emitting layer OL will be described later.

[0335] The second electrode CE may be disposed on the organic light-emitting layer OL. In some embodiments, the second electrode CE may have semi-transparency or transparency. When the second electrode CE has semi-transparency, the second electrode CE may include a single layer or multiple layers of at least one metal such as Ag, Mg, Cu, Al, Pt, Pd, Au, Ni, Nd, Ir, Cr, Li, Ca, LiF / Ca, LiF / Al, Mo, and Ti, or any composite or any mixture thereof (e.g., a mixture of Ag and Mg). When the thickness of the second electrode CE is several tens to several hundreds of angstroms, the second electrode CE may have semi-transparency.

[0336] When the second electrode CE has transparency, the second electrode CE may include a transparent conductive oxide (TCO). For example, the second electrode CE may include at least one of tungsten oxide (W x O y ), titanium oxide (TiO2), indium tin oxide (ITO), indium zinc oxide (IZO), zinc oxide (ZnO), indium tin zinc oxide (ITZO), and magnesium oxide (MgO).

[0337] In some embodiments, the organic light-emitting layer OL may have a structure in which a plurality of layers are stacked.

[0338] Referring to Figure 40 , in an embodiment, the organic light-emitting layer OL may include a first hole transport layer HTL1 disposed on the first electrode AE1 in the first light-emitting region LA1, a first light-emitting material layer EL11 disposed on the first hole transport layer HTL1, and a first electron transport layer ETL1 disposed on the first light-emitting material layer EL11. The organic light-emitting layer OL may include only one light-emitting layer (e.g., the first light-emitting material layer EL11 as the light-emitting layer), and the first light-emitting material layer EL11 may be a blue light-emitting layer. However, the laminated structure of the organic light-emitting layer OL is not limited to the structure described in relation to Figure 40 .

[0339] Referring again to Figure 39, a thin film encapsulation layer 170 is disposed on the second electrode CE. The thin film encapsulation layer 170 is commonly disposed in the first light emitting region LA1, the second light emitting region LA2, the third light emitting region LA3, and the non-light emitting region NLA. In some embodiments, the thin film encapsulation layer 170 directly covers the second electrode CE. In some embodiments, a cover layer covering the second electrode CE may also be disposed between the thin film encapsulation layer 170 and the second electrode CE, and in this case, the thin film encapsulation layer 170 may directly cover the cover layer.

[0340] In some embodiments, the thin film encapsulation layer 170 may include a first inorganic encapsulation layer 171, an organic encapsulation layer 173, and a second inorganic encapsulation layer 175 that are sequentially stacked on the second electrode CE. Its description is the same as the description described above.

[0341] According to some exemplary embodiments, the display device may include a liquid crystal display (LCD) as a first display substrate.

[0342] Figure 41 is a schematic cross-sectional view of a display device according to some exemplary embodiments.

[0343] Referring to Figure 41 , in the display device 1_10, the first display substrate 100_10 may be a liquid crystal display (LCD) including liquid crystal LC. Hereinafter, only the structure of the first display substrate 100_10 as a liquid crystal display (LCD) will be described, and the description of other structures will be omitted.

[0344] The first display substrate 100_10 may include a backlight unit BLU, a lower substrate 620, a first electrode 630, a liquid crystal layer 650, a second electrode 670, a lower alignment layer 640, an upper alignment layer 660, an upper substrate 680, a lower polarizer 610, and an upper polarizer 690.

[0345] According to an embodiment, the first display substrate 100_10 may include a lower substrate 620, an upper substrate 680 facing the lower substrate 620, a liquid crystal layer 650 disposed between the lower substrate 620 and the upper substrate 680, and a backlight unit BLU disposed on a side opposite to the second display substrate 300 based on the liquid crystal layer 650 (for example, disposed on one side of the lower substrate 620).

[0346] The backlight unit BLU may be disposed under the first display substrate 100_10 to provide light having a specific wavelength to the first display substrate 100_10. The backlight unit BLU may include a light source that directly emits light and a light guide plate that guides the light emitted from the light source and transmits the light to the first display substrate 100_10.

[0347] In an exemplary embodiment, the light source may emit light L1 of a first color. For example, the backlight unit BLU may supply light L1 of a first color (e.g., blue) to the first display substrate 100_10. In some embodiments, the light source may emit light having a peak wavelength in the ultraviolet band, and the backlight unit BLU may supply ultraviolet light to the first display substrate 100_10.

[0348] The lower substrate 620 may be disposed on the backlight unit BLU. The lower substrate 620 may include a plurality of insulating layers and switching elements and driving elements formed of thin film transistors. For example, the lower substrate 620 may be a thin film transistor substrate for controlling the alignment of liquid crystal LC disposed between the lower substrate 620 and the upper substrate 680.

[0349] The first electrode 630 may be provided on the lower substrate 620 for each light emitting region LA. The second electrode 670 may be disposed on the first electrode 630 without defining a pixel PX. The liquid crystal layer 650 may include liquid crystal LC and may be disposed between the first electrode 630 and the second electrode 670. The liquid crystal LC may be vertically aligned in an initial alignment state when having negative dielectric anisotropy, but the exemplary embodiment is not limited thereto.

[0350] When an electric field is formed between the first electrode 630 and the second electrode 670, the liquid crystal LC may be tilted or rotated, thereby changing the polarization state of the light transmitted through the liquid crystal layer 650. In some embodiments, the liquid crystal LC may be horizontally aligned in an initial alignment state when having positive dielectric anisotropy.

[0351] The lower alignment layer 640 may be disposed between the first electrode 630 and the liquid crystal layer 650, and the upper alignment layer 660 may be disposed between the second electrode 670 and the liquid crystal layer 650. The lower alignment layer 640 and the upper alignment layer 660 may induce the liquid crystal LC to have a predetermined pretilt angle in the initial alignment state.

[0352] The upper substrate 680 may support the second electrode 670. The upper substrate 680 may include a plurality of insulating layers and switching elements and driving elements formed of thin film transistors. For example, the upper substrate 680 may be a thin film transistor substrate for controlling the alignment of liquid crystal LC, but the exemplary embodiment is not limited thereto. In some exemplary embodiments, the upper substrate 680 may form a thin film transistor substrate together with the lower substrate 620, and in this way, the upper substrate 680 may or may not include switching elements and / or driving elements.

[0353] The lower polarizer 610 may be disposed between the backlight unit BLU and the lower substrate 620, and the upper polarizer 690 may be disposed between the upper substrate 680 and the second display substrate 300. Each of the lower polarizer 610 and the upper polarizer 690 may be at least one of an absorption polarizer and a reflective polarizer. For example, an absorption polarizer may absorb a polarization component parallel to the absorption axis and transmit a polarization component parallel to the transmission axis to impart polarized light to the transmitted light. The lower polarizer 610 and the upper polarizer 690 may perform an optical shutter function together with the liquid crystal layer 650 to control the amount of transmitted light for each light-emitting region LA.

[0354] The arrangement positions of the lower polarizer 610 and the upper polarizer 690 are not limited to Figure 41 the arrangement positions shown therein. For example, the lower polarizer 610 may be disposed between the lower substrate 620 and the liquid crystal layer 650, and the upper polarizer 690 may be disposed between the second electrode 670 and the liquid crystal layer 650.

[0355] As described above, the first display substrate 100_10 may be a liquid crystal display (LCD) capable of displaying an image by adjusting transmitted light through the control of the liquid crystal layer 650, and the light source that transmits light to the overlying second display substrate 300 may be the backlight unit BLU of the liquid crystal display (LCD).

[0356] Although certain exemplary embodiments and implementations have been described herein, other embodiments and modifications will be apparent from this description. Accordingly, the inventive concept is not limited to such embodiments, but rather to the appended claims and the broader scope of various obvious modifications and equivalent arrangements that will be apparent to those of ordinary skill in the art.

Claims

1. A display device, the display device comprising: A first display substrate, including a first substrate, a first electrode disposed on the first substrate, a second electrode spaced apart from the first electrode, and a light-emitting element disposed between the first electrode and the second electrode; And A second display substrate facing the first display substrate, the second display substrate being configured to receive light emitted from the light-emitting element, Wherein: The second display substrate includes a second substrate, a first color filter disposed on a surface of the second substrate, and a first wavelength conversion pattern disposed on the first color filter; The first wavelength conversion pattern includes a first surface facing the first display substrate and a second surface facing away from the first surface and facing the first color filter; The first surface includes a curved surface portion recessed toward the second surface, Wherein: The first color filter includes a third surface facing a surface of the second substrate and a fourth surface facing away from the third surface and facing the first wavelength conversion pattern, The second surface is parallel to the fourth surface, A part of the surface of the second substrate includes a recess, The first color filter is disposed on the recess, and Each of the third surface and the fourth surface includes a curved surface portion formed corresponding to the recess.

2. The display device according to claim 1, wherein: The third surface and the fourth surface are parallel to the surface of the second substrate; and The second surface is parallel to the surface of the second substrate.

3. The display device according to claim 2, wherein, A first distance, which is a distance between the center of the first surface and the center of the second surface, is shorter than a second distance, which is a distance between corresponding sides of the first surface and the second surface.

4. The display device according to claim 1, wherein A part of the second surface is curved along the curved surface portion of the fourth surface.

5. The display device according to claim 1, wherein, A first distance, which is a distance between the center of the first surface and the center of the second surface, is equal to a second distance, which is a distance between corresponding sides of the first surface and the second surface.

6. The display device according to claim 1, wherein, The center of curvature of the curved surface portion is disposed between the first wavelength conversion pattern and the first display substrate.

7. The display device according to claim 6, wherein: The second display substrate further includes a second color filter disposed on the surface of the second substrate and a light-transmitting pattern disposed on the second color filter; The light-transmitting pattern includes a surface facing the first display substrate and another surface facing the surface of the second substrate and facing the second color filter; and The surface of the light-transmitting pattern includes a curved surface portion.

8. The display device according to claim 7, wherein, The second display substrate further includes: A first light-blocking member disposed between the first color filter and the second color filter; and A partition wall disposed on the first light-blocking member and disposed between the first wavelength conversion pattern and the light-transmitting pattern.

9. The display device according to claim 1, wherein, The first electrode and the second electrode are disposed on the first substrate.

10. The display device according to claim 9, wherein, The first electrode and the second electrode extend along a first direction on the first substrate and are spaced apart from each other in a second direction different from the first direction.

11. The display device according to claim 10, wherein, The first end portion of the light-emitting element is electrically connected to the first electrode, and the second end portion of the light-emitting element is electrically connected to the second electrode.

12. A display device, comprising: A first display substrate, including a first light-emitting region, a second light-emitting region spaced apart from the first light-emitting region in a first direction, and a non-light-emitting region disposed between the first light-emitting region and the second light-emitting region; And A second display substrate disposed on the first display substrate, the second display substrate including a first light-transmitting region, a second light-transmitting region spaced apart from the first light-transmitting region in the first direction, and a non-light-transmitting region disposed between the first light-transmitting region and the second light-transmitting region, Wherein: The first display substrate further includes a first light-emitting element disposed in the first light-emitting region and a second light-emitting element disposed in the second light-emitting region; The second display substrate further includes a first color filter disposed in the first light-transmitting region, a light-transmitting pattern disposed on the first color filter, a second color filter disposed in the second light-transmitting region, and a first wavelength conversion pattern disposed on the second color filter; Each of the light-transmitting pattern and the first wavelength conversion pattern includes a first surface facing the first display substrate and a second surface facing away from the first surface; and The first surface includes a curved surface portion recessed toward the second surface, Wherein: The first color filter includes: a third surface; and a fourth surface facing away from the third surface and facing the light-transmitting pattern; and Each of the third surface and the fourth surface includes a curved surface portion.

13. The display device according to claim 12, wherein, Correlated with each of the light-transmitting pattern and the first wavelength conversion pattern, a first distance, which is the distance between the center of the first surface and the center of the second surface, is shorter than a second distance, which is the distance between the corresponding sides of the first surface and the second surface.

14. The display device according to claim 12, wherein, The second surface of the light-transmitting pattern includes a curved surface portion protruding toward the first color filter.

15. The display device according to claim 14, wherein, Correlated with the light-transmitting pattern, a first distance, which is the distance between the center of the first surface and the center of the second surface, is equal to a second distance, which is the distance between the corresponding sides of the first surface and the second surface.

16. The display device according to claim 12, wherein: The centers of curvature of the first surface, the second surface, and the fourth surface are disposed between the light-transmitting pattern and the first display substrate; and The center of curvature of the third surface is disposed between the first color filter and the first display substrate.

17. The display device according to claim 12, wherein, The second display substrate further includes: A light-blocking member disposed between the first color filter and the second color filter in the non-light-transmitting region; and A partition wall disposed on the light-blocking member and disposed between the light-transmitting pattern and the first wavelength conversion pattern.

18. The display device according to claim 12, wherein: In each of the first light-emitting region and the second light-emitting region, the first display substrate further includes a first electrode and a second electrode spaced apart from the first electrode; The first light-emitting element is disposed between the first electrode and the second electrode in the first light-emitting region; And The second light-emitting element is disposed between the first electrode and the second electrode in the second light-emitting region.

19. The display device according to claim 18, wherein: The first light-emitting element is configured to emit light of a first color toward the light-transmitting pattern; and The first color filter is configured to transmit the light of the first color and block light other than the light of the first color.

20. The display device according to claim 19, wherein: The second light-emitting element is configured to emit the light of the first color toward the first wavelength conversion pattern; and The first wavelength conversion pattern is configured to convert the light of the first color into light of a second color different from the first color, and is configured to provide the light of the second color to the second color filter.

21. The display device according to claim 20, wherein, The second color filter is configured to transmit the light of the second color and block light other than the light of the second color.

22. The display device according to claim 19, wherein, The second light-emitting element is configured to emit light of a second color different from the first color toward the first wavelength conversion pattern.

23. The display device according to claim 18, wherein, The first display substrate further includes a plurality of dams disposed in the non-light-emitting region.

Images