Display device

Abstract

The display device includes: a first substrate member having a first light-emitting area, a second light-emitting area, and a non-light-emitting area between the first and second light-emitting areas; a second substrate member on the first substrate member; a first color filter on a first surface of the second substrate member facing the first substrate member and overlapping the first light-emitting area; a second color filter on the first surface of the second substrate member and overlapping the second light-emitting area; a color pattern on the first surface of the second substrate member, between the first and second color filters, and overlapping the non-light-emitting area; a light-shielding member on the color pattern and overlapping the non-light-emitting area; and a first wavelength conversion pattern on the second color filter and including a first wavelength shifter.

Description

[0001] Cross-reference to related applications

[0002] This application claims priority and benefit to Korean Patent Application No. 10-2019-0043835, filed on April 15, 2019, with the Korean Intellectual Property Office, the disclosure of which is incorporated herein by reference in its entirety. Technical Field

[0003] This disclosure relates to display devices. Background Technology

[0004] With the development of multimedia, display devices have become increasingly important. As a result, various display devices have been developed (such as liquid crystal display (LCD) devices, organic light-emitting diode (OLED) display devices, etc.).

[0005] Meanwhile, the self-emissive display device includes self-emissive elements, such as OLEDs. Each of the self-emissive elements may include two electrodes facing each other and an emissive layer inserted between the two electrodes. In the case where the self-emissive element is an OLED, electrons and holes from the two electrodes recombine in the emissive layer to generate excitons, and light can be emitted in response to the excitons transitioning from an excited state to a ground state.

[0006] Because self-emissive display devices do not require an independent light source, they have become increasingly popular as the next generation of display devices due to their low power consumption, thinness, and many high-quality features such as wide viewing angles, high brightness, excellent contrast, and fast response times.

[0007] Meanwhile, in order to allow each pixel of a display device to uniquely display a single base color, a method has been proposed in which a color conversion pattern or wavelength conversion pattern is set in each pixel along the path of light from the light source to the observer. Summary of the Invention

[0008] The embodiments of this disclosure relate to a display device capable of improving display quality.

[0009] However, the embodiments of this disclosure are not limited to those set forth herein. The above and other aspects of this disclosure will become more apparent to those skilled in the art upon reference to the detailed description of this disclosure given below.

[0010] According to embodiments of this disclosure, a display device includes: a first substrate member having a first light-emitting region, a second light-emitting region, and a non-light-emitting region between the first and second light-emitting regions; a first anode electrode on the first substrate member and located in the first light-emitting region; a second anode electrode on the first substrate member and located in the second light-emitting region; a plurality of light-emitting layers on the first and second anode electrodes; a cathode electrode on the plurality of light-emitting layers; a second substrate member on the cathode electrode, the second substrate member having a first surface facing the first substrate member; a first color filter on the first surface of the second substrate member and overlapping the first light-emitting region; and a second color filter on the first surface of the second substrate member. The light-emitting layer comprises a first light-emitting layer, a second light-emitting layer, and a third light-emitting layer that overlaps with each other, and is located on the second base member and overlaps with the non-light-emitting area; a light-shielding member that is on the color pattern and overlaps with the non-light-emitting area; and a first wavelength conversion pattern that is on the second color filter and includes a first wavelength shifter, wherein the plurality of light-emitting layers include a first light-emitting layer, a second light-emitting layer, and a third light-emitting layer that overlap with each other, the first light-emitting layer, the second light-emitting layer, and the third light-emitting layer being used to emit light having a peak wavelength of about 440 nm to about 610 nm, one of the first light-emitting layer, the second light-emitting layer, and the third light-emitting layer being used to emit light with a first peak wavelength, and another of the first light-emitting layer, the second light-emitting layer, and the third light-emitting layer being used to emit light with a second peak wavelength different from the first peak wavelength.

[0011] According to embodiments of this disclosure, a display device includes: a substrate member having a first light-emitting area, a second light-emitting area, and a non-light-emitting area between the first and second light-emitting areas; a first anode electrode on the substrate member and located in the first light-emitting area; a second anode electrode on the substrate member and located in the second light-emitting area; a plurality of light-emitting layers on the first and second anode electrodes; a cathode electrode on the plurality of light-emitting layers; a thin-film encapsulation layer on the cathode electrode; a first color filter on the thin-film encapsulation layer and overlapping the first light-emitting area; a second color filter on the thin-film encapsulation layer and overlapping the second light-emitting area; and a color pattern on the thin-film encapsulation layer, wherein the color... The pattern is located between a first color filter and a second color filter and overlaps with a non-emitting area; a light-shielding member is located on the color pattern and overlaps with the non-emitting area; a light-transmitting pattern is located between the first color filter and the thin-film encapsulation layer; and a wavelength conversion pattern is located between the second color filter and the thin-film encapsulation layer and includes a wavelength shifter, wherein a plurality of light-emitting layers include a first light-emitting layer, a second light-emitting layer and a third light-emitting layer that overlap each other, the first light-emitting layer, the second light-emitting layer and the third light-emitting layer are used to emit light having a peak wavelength of about 440 nm to about 610 nm, one of the first light-emitting layer, the second light-emitting layer and the third light-emitting layer is used to emit light with a first peak wavelength, and another of the first light-emitting layer, the second light-emitting layer and the third light-emitting layer is used to emit light with a second peak wavelength different from the first peak wavelength.

[0012] According to the above and other embodiments of this disclosure, a display device with improved display quality can be provided.

[0013] Other features and embodiments may become apparent from the following detailed description, drawings and claims. Attached Figure Description

[0014] The above and other embodiments and features of this disclosure will become more apparent from a more detailed description of their implementation with reference to the accompanying drawings, wherein:

[0015] Figure 1 This is a perspective view of a display device according to an embodiment of the present disclosure;

[0016] Figure 2 It is along Figure 1 The line Xa-Xa' intercepts Figure 1 A cross-sectional view of the display device;

[0017] Figure 3 It is shown Figure 1 A plan view of the display substrate in the display area of ​​the display device;

[0018] Figure 4 It is shown Figure 1 A plan view of the color conversion substrate in the display area of ​​the display device;

[0019] Figure 5 It is along Figure 3 or Figure 4 The line X1-X1' intercepts Figure 1 A cross-sectional view of the display device;

[0020] Figure 6 yes Figure 5 A magnified cross-sectional view of part of Q;

[0021] Figure 7 yes Figure 6 An enlarged cross-sectional view of a modified example of Q;

[0022] Figure 8 It is along Figure 3 or Figure 4 The line X2-X2' intercepts Figure 1 A cross-sectional view of the display device;

[0023] Figure 9 It is along Figure 3 or Figure 4 The line X3-X3' intercepted Figure 1 A cross-sectional view of the display device;

[0024] Figure 10 It is along Figure 3 or Figure 4 The line X4-X4' intercepts Figure 1 A cross-sectional view of the display device;

[0025] Figure 11 It is along Figure 3 or Figure 4 The line X5-X5' intercepted Figure 1 A cross-sectional view of the display device;

[0026] Figure 12 It is shown Figure 1 A plan view of the arrangement of the first color filter and color pattern in the color conversion substrate of the display device;

[0027] Figure 13 It is shown Figure 1 A plan view of the arrangement of light-shielding components in the color conversion substrate of the display device;

[0028] Figure 14 It is shown Figure 1 A plan view of the arrangement of the second and third color filters in the color conversion substrate of the display device;

[0029] Figure 15 It is shown Figure 1 A plan view of the arrangement of the first wavelength conversion pattern, the second wavelength conversion pattern, and the light-transmitting pattern in the color conversion substrate of the display device;

[0030] Figure 16 It is according to another embodiment of this disclosure along Figure 3 or Figure 4 A cross-sectional view of the display device taken by line X1-X1';

[0031] Figure 17 It is shown Figure 16 A plan view of the arrangement of barrier walls in the color conversion substrate of a display device;

[0032] Figure 18 It is shown Figure 16 A plan view of the arrangement of the first wavelength conversion pattern, the second wavelength conversion pattern, and the light-transmitting pattern in the color conversion substrate of the display device;

[0033] Figure 19 It is according to another embodiment of this disclosure along Figure 3 or Figure 4 A cross-sectional view of the display device taken by line X1-X1'; and

[0034] Figure 20 It is according to another embodiment of this disclosure along Figure 3 or Figure 4 A cross-sectional view of the display device taken by line X1-X1'. Detailed Implementation

[0035] The features of the inventive concept and the methods of implementing it will be more readily understood by referring to the following detailed description and accompanying drawings of the embodiments. However, the inventive concept can be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete and will fully convey the inventive concept to those skilled in the art. The inventive concept will be defined only by the appended claims and their equivalents. The same reference numerals refer to the same elements throughout the specification.

[0036] It should be understood that when an element or layer is referred to as being “on,” “connected to,” or “coupled to” another element or layer, it may be directly on, directly connected to, or directly coupled to the other element or layer, or there may be intermediate elements or layers. Conversely, when an element is referred to as being “directly” on, directly connected to, or directly coupled to another element or layer, there are no intermediate elements or layers. As used herein, the term “and / or” includes any and all combinations of one or more of the associated listed items.

[0037] For ease of description, spatial relative terms such as “below,” “under,” “down,” “above,” “upper,” etc., may be used herein to describe the relationship between one element or feature as shown in the figures and another element (or feature) or feature (or feature). It should be understood that spatial relative terms are intended to encompass different orientations of the device in use or operation beyond those depicted in the figures. For example, if the device in the figures is flipped, an element described as “below” or “under” other elements or features would then be oriented “above” other elements or features. Thus, the exemplary term “below” can encompass both above and below orientations. The device may be oriented in other ways (rotated 90 degrees or in other orientations), and the spatial relative descriptors used herein may be interpreted accordingly.

[0038] It should be understood that although the terms first, second, etc., may be used herein to describe various elements, components, regions, layers, and / or portions, these elements, components, regions, layers, and / or portions should not be limited by these terms. These terms are used only to distinguish one element, component, region, layer, or portion from another element, component, region, layer, or portion. Therefore, without departing from the teachings of the inventive concept, the first element, component, region, layer, or portion discussed below may be referred to as the second element, component, region, layer, or portion.

[0039] The embodiments described herein will be illustrated with reference to plan and cross-sectional views, which are ideal schematic diagrams of embodiments of the invention. Therefore, the illustrations may be modified by manufacturing techniques and / or tolerances. Thus, the embodiments of the invention are not limited to a specific form and also include deviations caused by manufacturing processes. Therefore, the areas shown in the drawings are schematic in nature, and the shapes of the areas shown in the drawings are intended to illustrate the specific type of area of ​​the element and not to limit the scope of the invention.

[0040] Embodiments of this disclosure will now be described with reference to the accompanying drawings.

[0041] Figure 1 This is a perspective view of a display device according to an embodiment of the present disclosure. Figure 2 It is along Figure 1 The line Xa-Xa' intercepts Figure 1 A cross-sectional view of the display device, and Figure 3 It is shown Figure 1 A plan view of the display substrate in the display area of ​​the display device.

[0042] refer to Figures 1 to 3The display device 1 can be applied to various electronic devices, such as tablet PCs, smartphones, in-vehicle navigation units, cameras, central information displays (CIDs), wristwatches, personal digital assistants (PDAs), portable multimedia players (PMPs), small to medium-sized electronic devices (e.g., game consoles), or medium to large-sized electronic devices (e.g., televisions, billboards, monitors, or laptops). However, this disclosure is not limited thereto, and the display device 1 can also be applied to various other suitable electronic devices without departing from the inventive concept of this disclosure.

[0043] In some embodiments, the display device 1 may have a rectangular shape in a plan view. The display device 1 may include two first sides extending in a first direction D1 and two second sides extending in a second direction D2 that intersects (e.g., crosses) the first direction D1. The angle at which the first and second sides of the display device 1 meet may be a right angle or curved. In some embodiments, the first side may be shorter than the second side, but this disclosure is not limited thereto. The planar shape of the display device 1 is not particularly limited, and the display device 1 may have a circular shape or another suitable shape in a plan view.

[0044] The display device 1 may include a display area DA in which an image is displayed and a non-display area NDA in which no image is displayed. In some embodiments, the non-display area NDA may be disposed on the outer periphery of the display area DA and may surround the display area DA.

[0045] Unless otherwise indicated, as used herein, the terms “upper,” “top,” “top,” and “top surface” refer to a third direction D3 that intersects (e.g., crosses) the first direction D1 and the second direction D2, and as used herein, the terms “below,” “lower,” “bottom,” and “bottom surface” refer to the opposite direction of the third direction D3.

[0046] In some embodiments, the display device 1 may include a display substrate 10, a color conversion substrate 30 facing the display substrate 10, and a sealing member 50 coupling the display substrate 10 and the color conversion substrate 30. The display device 1 may further include a filler member 70 filled between the display substrate 10 and the color conversion substrate 30.

[0047] The display substrate 10 may include elements and circuits for displaying images, such as pixel circuitry for switching elements, pixel defining films for defining light-emitting and non-light-emitting areas in the display area DA, and self-emissive elements. For example, the self-emissive element may be an organic light-emitting diode (OLED), a quantum dot light-emitting diode (QLED), an inorganic material-based micro-LED, or an inorganic material-based nano-LED. For convenience, it is assumed that the self-emissive element is, for example, an OLED.

[0048] A color conversion substrate 30 may be disposed on a display substrate 10 and may face the display substrate 10. In some embodiments, the color conversion substrate 30 may include a color conversion pattern that converts the color of incident light. In some embodiments, the color conversion pattern may include a color filter and / or a wavelength conversion pattern.

[0049] In the non-display area NDA, a sealing member 50 may be disposed between the display substrate 10 and the color conversion substrate 30. In a plan view, the sealing member 50 may be disposed along the edge of the display substrate 10 or the color conversion substrate 30 to surround the display area DA. The display substrate 10 and the color conversion substrate 30 may be coupled together via the sealing member 50.

[0050] In some embodiments, the sealing member 50 may be formed of an organic material. For example, the sealing member 50 may be formed of epoxy resin, but this disclosure is not limited thereto.

[0051] The filler member 70 can be disposed in the gap between the display substrate 10 and the color conversion substrate 30, and is surrounded by the sealing member 50. The filler member 70 can fill the gap between the display substrate 10 and the color conversion substrate 30.

[0052] In some embodiments, the filler member 70 may be formed of a material capable of transmitting light through it. In some embodiments, the filler member 70 may be formed of an organic material. For example, the filler member 70 may be formed of a silicon (Si)-based organic material or an epoxy resin-based organic material, but this disclosure is not limited thereto. In some embodiments, the filler member 70 may not be provided.

[0053] Figure 3 It is shown Figure 1 A plan view of the display substrate in the display area of ​​the display device, and Figure 4 It is shown Figure 1 A plan view of the color conversion substrate in the display area of ​​a display device.

[0054] refer to Figure 3 and Figure 4 And refer to again Figure 1 and Figure 2 In the display area DA, multiple light-emitting areas (LA1, LA2, LA3, LA4, LA5, and LA6) and non-light-emitting areas (NLA) can be defined on the display substrate 10. The light-emitting areas (LA1, LA2, LA3, LA4, LA5, and LA6) can be areas that emit light generated by the self-emissive elements to the outside of the display substrate 10, and the non-light-emitting areas (NLA) can be areas that do not emit light to the outside of the display substrate 10.

[0055] In some embodiments, the light emitted from the light-emitting regions (LA1, LA2, LA3, LA4, LA5, and LA6) to the outside of the display substrate 10 may have a first color. In some embodiments, the first color light may be blue light and may have a peak wavelength of about 440 nm to about 480 nm.

[0056] In some embodiments, in the display area DA, the first light-emitting area LA1, the second light-emitting area LA2 and the third light-emitting area LA3 may be arranged sequentially along the first direction D1 in the first row RL1 of the display substrate 10, and the fourth light-emitting area LA4, the fifth light-emitting area LA5 and the sixth light-emitting area LA6 may be arranged sequentially along the first direction D1 in the second row RL2 of the display substrate 10, the second row RL2 being adjacent to the first row RL1 in the second direction D2.

[0057] In some embodiments, the first width WL1 of the first light-emitting area LA1 in the first direction D1 may be smaller than the second width WL2 of the second light-emitting area LA2 in the first direction D1 and the third width WL3 of the third light-emitting area LA3 in the first direction D1. In some embodiments, the second width WL2 of the second light-emitting area LA2 and the third width WL3 of the third light-emitting area LA3 may be different from each other. For example, the second width WL2 of the second light-emitting area LA2 may be larger than the third width WL3 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 the area of ​​the third light-emitting area LA3. The area of ​​the second light-emitting area LA2 may be smaller than or larger than the area of ​​the third light-emitting area LA3. However, this disclosure is not limited thereto. In other embodiments, the first width WL1 of the first light-emitting area LA1, the second width WL2 of the second light-emitting area LA2, and the third width WL3 of the third light-emitting area LA3 may all be substantially the same. Moreover, in other embodiments, the areas of the first light-emitting area LA1, the second light-emitting area LA2, and the third light-emitting area LA3 may all be substantially the same.

[0058] The fourth light-emitting area LA4, which is adjacent to the corresponding first light-emitting area LA1 in the second direction D2, differs from the first light-emitting area LA1 only in that it is located in the second row RL2, and is substantially the same as the first light-emitting area LA1 in terms of its width, area and the construction of the elements therein.

[0059] Similarly, the second luminescent region LA2 and the fifth luminescent region LA5, which are adjacent to each other in the second direction D2, may have substantially the same structure, and the third luminescent region LA3 and the sixth luminescent region LA6, which are adjacent to each other in the second direction D2, may have substantially the same structure.

[0060] In the display area DA, multiple light-transmitting areas (TA1, TA2, TA3, TA4, TA5, and TA6) and a light-blocking area BA can be defined on the color conversion substrate 30. The light-transmitting areas (TA1, TA2, TA3, TA4, TA5, and TA6) can be areas that provide light emitted from the display substrate 10 to the outside of the display device 1 through the color conversion substrate 30. The light-blocking area BA can be an area that does not transmit light emitted from the display substrate 10.

[0061] In some embodiments, in the display area DA, a first light-transmitting area TA1, a second light-transmitting area TA2, and a third light-transmitting area TA3 may be sequentially arranged along a first direction D1 in the first row RT1 of the color conversion substrate 30. The first light-transmitting area TA1 may correspond to or overlap with the first light-emitting area LA1. Similarly, the second light-transmitting area TA2 and the third light-transmitting area TA3 may correspond to or overlap with the second light-emitting area LA2 and the third light-emitting area LA3, respectively.

[0062] In some embodiments, light of a first color provided by the display substrate 10 can be provided to the outside of the display device 1 through a first light-transmitting region TA1, a second light-transmitting region TA2, and a third light-transmitting region TA3. The color of the first emitted light (which is light emitted to the outside of the display device 1 through the first light-transmitting region TA1) can be the first color, the color of the second emitted light (which is light emitted to the outside of the display device 1 through the second light-transmitting region TA2) can be a second color different from the first color, and the color of the light emitted to the outside of the display device 1 through the third light-transmitting region TA3 (e.g., the third emitted light) can be a third color different from the first and second colors. In some embodiments, the first color light can be blue light with a peak wavelength of about 440 nm to about 480 nm, the second color light can be red light with a peak wavelength of about 610 nm to about 650 nm, and the third color light can be green light with a peak wavelength of about 510 nm to about 550 nm.

[0063] The fourth light-transmitting area TA4, the fifth light-transmitting area TA5, and the sixth light-transmitting area TA6 can be sequentially arranged along the first direction D1 in the second row RT2 of the color conversion substrate 30, which is adjacent to the first row RT1 in the second direction D2. The fourth light-transmitting area TA4, the fifth light-transmitting area TA5, and the sixth light-transmitting area TA6 can correspond to the fourth light-emitting area LA4, the fifth light-emitting area LA5, and the sixth light-emitting area LA6, respectively, or overlap with the fourth light-emitting area LA4, the fifth light-emitting area LA5, and the sixth light-emitting area LA6, respectively.

[0064] In some embodiments, the first width WT1 of the first light-transmitting area TA1 in the first direction D1 may be smaller than the second width WT2 of the second light-transmitting area TA2 in the first direction D1 and the third width WT3 of the third light-transmitting area TA3 in the first direction D1. In some embodiments, the second width WT2 of the second light-transmitting area TA2 and the third width WT3 of the third light-transmitting area TA3 may be different from each other. For example, the second width WT2 of the second light-transmitting area TA2 may be larger than the third width WT3 of the third light-transmitting area TA3. In some embodiments, the area of ​​the first light-transmitting area TA1 may be smaller than the area of ​​the second light-transmitting area TA2 and the area of ​​the third light-transmitting area TA3.

[0065] The first light-transmitting area TA1 and the fourth light-transmitting area TA4, which are adjacent to each other in the second direction D2, are substantially the same in terms of their width and area, the construction of the elements therein, and the color of the light emitted from them to the outside of the display device 1.

[0066] Similarly, the second light-transmitting area TA2 and the fifth light-transmitting area TA5, which are adjacent to each other in the second direction D2, may have substantially the same structure and can emit light of substantially the same color to the outside of the display device 1. Moreover, the third light-transmitting area TA3 and the sixth light-transmitting area TA6, which are adjacent to each other in the second direction D2, may have substantially the same structure and can emit light of substantially the same color to the outside of the display device 1.

[0067] In the display area DA, the light-blocking area BA can be disposed on the outer periphery of the light-transmitting areas (TA1, TA2, TA3, TA4, TA5, and TA6) of the color conversion substrate 30. In some embodiments, the light-blocking area BA may include a first light-blocking area BA1, a second light-blocking area BA2, a third light-blocking area BA3, a fourth light-blocking area BA4, a fifth light-blocking area BA5, a sixth light-blocking area BA6, and a seventh light-blocking area BA7.

[0068] The first light-blocking area BA1 can be disposed along the first direction D1 between the corresponding first light-transmitting area TA1 and the corresponding second light-transmitting area TA2, the second light-blocking area BA2 can be disposed along the first direction D1 between the corresponding second light-transmitting area TA2 and the corresponding third light-transmitting area TA3, and the third light-blocking area BA3 can be disposed along the first direction D1 between the corresponding third light-transmitting area TA3 and the corresponding first light-transmitting area TA1.

[0069] The fourth light-blocking area BA4 can be set along the first direction D1 between the corresponding fourth light-transmitting area TA4 and the corresponding fifth light-transmitting area TA5. The fifth light-blocking area BA5 can be set along the first direction D1 between the corresponding fifth light-transmitting area TA5 and the corresponding sixth light-transmitting area TA6. The sixth light-blocking area BA6 can be set along the first direction D1 between the corresponding sixth light-transmitting area TA6 and the corresponding fourth light-transmitting area TA4.

[0070] The seventh light-blocking zone BA7 can be set between the first row RT1 and the second row RT2 that are adjacent to each other in the second direction D2.

[0071] The structure of display device 1 will be described below.

[0072] Figure 5 It is along Figure 3 or Figure 4 The line X1-X1' intercepts Figure 1 A cross-sectional view of the display device. Figure 6 yes Figure 5 A magnified cross-sectional view of part of Q. Figure 7 yes Figure 6 An enlarged cross-sectional view of a modified example of Q. Figure 8 It is along Figure 3 or Figure 4 The line X2-X2' intercepts Figure 1 A cross-sectional view of the display device. Figure 9 It is along Figure 3 or Figure 4 The line X3-X3' intercepted Figure 1 A cross-sectional view of the display device. Figure 10 It is along Figure 3 or Figure 4 The line X4-X4' intercepts Figure 1 A cross-sectional view of the display device, and Figure 11 It is along Figure 3 or Figure 4 The line X5-X5' intercepted Figure 1 A cross-sectional view of the display device. Here, Figure 3 The lines X1-X1', X2-X2', X3-X3', X4-X4', and X5-X5' in the equation are... Figure 4 The corresponding lines X1-X1', X2-X2', X3-X3', X4-X4', and X5-X5' in Figure 1 The same position as the display device 1.

[0073] refer to Figures 5 to 11 And refer to again Figures 3 to 4 The display device 1 may include a display substrate 10 and a color conversion substrate 30, and may further include a filler member 70 disposed between the display substrate 10 and the color conversion substrate 30.

[0074] The display substrate 10 will be described below.

[0075] The first substrate member 110 may be formed of a transparent material. In some embodiments, the first substrate member 110 may be a glass substrate or a plastic substrate. In the case where the first substrate member 110 is a plastic substrate, the first substrate member 110 may be flexible. In some embodiments, the first substrate member 110 may include a glass substrate or a plastic substrate and may further include a separate layer disposed on the glass substrate or the plastic substrate, such as a buffer layer or an insulating layer.

[0076] In some embodiments, as mentioned above, the light-emitting regions (LA1, LA2, LA3, LA4, LA5 and LA6) and the non-light-emitting regions (NLA) may be defined on the first substrate member 110.

[0077] like Figure 5 As shown, switching elements (T1, T2, and T3) may be disposed on the first substrate member 110. In some embodiments, the first switching element T1, the second switching element T2, and the third switching element T3 may be disposed in the first light-emitting region LA1, the second light-emitting region LA2, and the third light-emitting region LA3, respectively, but this disclosure is not limited thereto. In other embodiments, at least one of the first switching element T1, the second switching element T2, and the third switching element T3 may be disposed in the non-light-emitting region NLA.

[0078] In some embodiments, the first switching element T1, the second switching element T2, and the third switching element T3 may be thin-film transistors (TFTs) comprising polysilicon or oxide semiconductors.

[0079] In one embodiment, a plurality of signal lines (e.g., gate lines, data lines, power lines and / or the like) may be further disposed on the first base member 110 to transmit signals to the switching elements (T1, T2 and T3).

[0080] An insulating film 130 may be disposed on the first switching element T1, the second switching element T2, and the third switching element T3. In some embodiments, the insulating film 130 may be a planarization film. In some embodiments, the insulating film 130 may be formed as an organic film. For example, the insulating film 130 may include acrylic resin, epoxy resin, imide resin, or ester resin. In some embodiments, the insulating film 130 may include a positive photosensitive material or a negative photosensitive material.

[0081] like Figure 5 and Figures 8 to 10As shown, a first anode electrode AE1, a second anode electrode AE2, and a third anode electrode AE3 can be disposed on an insulating film 130. The first anode electrode AE1 can be disposed in a first light-emitting region LA1 and can extend at least partially into a non-light-emitting region NLA; the second anode electrode AE2 can be disposed in a second light-emitting region LA2 and can extend at least partially into a non-light-emitting region NLA; and the third anode electrode AE3 can be disposed in a third light-emitting region LA3 and can extend at least partially into a non-light-emitting region NLA. The first anode electrode AE1, the second anode electrode AE2, and the third anode electrode AE3 can respectively penetrate the insulating film 130 to connect to a first switching element T1, a second switching element T2, and a third switching element T3.

[0082] In some embodiments, the first anode electrode AE1, the second anode electrode AE2, and the third anode electrode AE3 may have different widths or different areas. For example, the width of the first anode electrode AE1 may be smaller than the width of the second anode electrode AE2, and the width of the third anode electrode AE3 may be smaller than the width of the second anode electrode AE2, but larger than the width of the first anode electrode AE1. For example, the area of ​​the first anode electrode AE1 may be smaller than the area of ​​the second anode electrode AE2, and the area of ​​the third anode electrode AE3 may be smaller than the area of ​​the second anode electrode AE2, but larger than the area of ​​the first anode electrode AE1. In another example, the area of ​​the first anode electrode AE1 may be smaller than the area of ​​the second anode electrode AE2, and the area of ​​the third anode electrode AE3 may be larger than the areas of the first anode electrode AE1 and the second anode electrode AE2. However, this disclosure is not limited to these examples. In another example, the first anode electrode AE1, the second anode electrode AE2, and the third anode electrode AE3 may have substantially the same width or substantially the same area.

[0083] The first anode electrode AE1, the second anode electrode AE2, and the third anode electrode AE3 may be reflective electrodes. In this case, each of the first anode electrode AE1, the second anode electrode AE2, and the third anode electrode AE3 may include a metal layer formed of a metal (such as Ag, Mg, Al, Pt, Pd, Au, Ni, Nd, Ir, or Cr). In some embodiments, each of the first anode electrode AE1, the second anode electrode AE2, and the third anode electrode AE3 may further include a metal oxide layer deposited on the metal layer. For example, the first anode electrode AE1, the second anode electrode AE2, and the third anode electrode AE3 may have a bilayer structure of ITO / Ag, Ag / ITO, ITO / Mg, or ITO / MgF2, or a multilayer structure of ITO / Ag / ITO.

[0084] A pixel defining film 150 may be disposed on a first anode electrode AE1, a second anode electrode AE2, and a third anode electrode AE3. The pixel defining film 150 may include holes exposing the first anode electrode AE1, the second anode electrode AE2, and the third anode electrode AE3, and may define a first light-emitting area LA1, a second light-emitting area LA2, a third light-emitting area LA3, and a non-light-emitting area NLA. That is, the portion of the first anode electrode AE1 that is not covered by the pixel defining film 150 but exposed thereto corresponds to the first light-emitting area LA1, the portion of the second anode electrode AE2 that is not covered by the pixel defining film 150 but exposed thereto corresponds to the second light-emitting area LA2, and the portion of the third anode electrode AE3 that is not covered by the pixel defining film 150 but exposed thereto corresponds to the third light-emitting area LA3. The area where the pixel defining film 150 is disposed may be the non-light-emitting area NLA.

[0085] In some embodiments, the pixel defining film 150 may include an organic insulating material, such as acrylic resin, epoxy resin, phenolic resin, polyamide resin, polyimide resin, unsaturated polyester resin, polyphenylene sulfide resin, or benzocyclobutene (BCB).

[0086] In some embodiments, the pixel defining film 150 may be coupled with Figure 12 Color pattern 250 and Figure 13 The light-shielding components 220 overlap. For example, as... Figure 5 As shown, the pixel defining film 150 can overlap with the first light-shielding member 221, the second light-shielding member 222, and the third light-shielding member 223. Furthermore, the pixel defining film 150 can overlap with the first color pattern 251, the second color pattern 252, and the third color pattern 253.

[0087] The pixel-limiting film 150 can overlap with the anti-color mixing component 370.

[0088] like Figure 5 and Figures 8 to 11 As shown, the light-emitting layer OL can be disposed on the first anode electrode AE1, the second anode electrode AE2, and the third anode electrode AE3.

[0089] In some embodiments, the light-emitting layer OL may be a continuous film formed in the light-emitting regions (LA1, LA2, LA3, LA4, LA5 and LA6) and the non-light-emitting regions NLA and spanning the light-emitting regions (LA1, LA2, LA3, LA4, LA5 and LA6) and the non-light-emitting regions NLA.

[0090] like Figure 5 and Figures 8 to 11 As shown, the cathode electrode CE can be disposed on the light-emitting layer OL.

[0091] In some embodiments, the cathode electrode CE may be translucent or transparent. When the cathode electrode CE is translucent, it may comprise Ag, Mg, Cu, Al, Pt, Pd, Au, Ni, Nd, Ir, Cr, Li, Ca, LiF / Ca, LiF / Al, Mo, Ti, or compounds or mixtures thereof, such as a mixture of Ag and Mg. When the thickness of the cathode electrode CE is tens to hundreds of angstroms, it may be translucent.

[0092] When the cathode electrode CE is transparent, the cathode electrode CE comprises a transparent conductive oxide (TCO). For example, the cathode CE may comprise 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), or magnesium oxide (MgO).

[0093] A first anode electrode AE1, a light-emitting layer OL, and a cathode electrode CE can form a first light-emitting element ED1; a second anode electrode AE2, a light-emitting layer OL, and a cathode electrode CE can form a second light-emitting element ED2; and a third anode electrode AE3, a light-emitting layer OL, and a cathode electrode CE can form a third light-emitting element ED3. The first light-emitting element ED1, the second light-emitting element ED2, and the third light-emitting element ED3 can emit emitted light L1 and provide emitted light L1 to the color conversion substrate 30.

[0094] like Figure 6 As shown, the emitted light L1 ultimately emitted by the emitting layer OL can be a mixture of a first component L11 and a second component L12. The first component L11 and the second component L12 can have peak wavelengths of about 440 nm to about 610 nm. That is, the emitted light L1 may not include a red light component. Here, as used herein, the term "peak wavelength" can refer to the wavelength at which the spectrum reaches its maximum intensity.

[0095] The light-emitting layer OL may include: a first stack ST1, which includes a first light-emitting layer EML1; a second stack ST2, which is disposed on the first stack ST1 and includes a second light-emitting layer EML2; a third stack ST3, which is disposed on the second stack ST2 and includes a third light-emitting layer EML3; a first charge-generating layer CGL1, which is disposed between the first stack ST1 and the second stack ST2; and a second charge-generating layer CGL2, which is disposed between the second stack ST2 and the third stack ST3. The first stack ST1, the second stack ST2, and the third stack ST3 may be configured to overlap each other.

[0096] The first light-emitting layer EML1, the second light-emitting layer EML2, and the third light-emitting layer EML3 can be configured to overlap each other.

[0097] In some embodiments, the light emitted by the first light-emitting layer EML1, the second light-emitting layer EML2, and the third light-emitting layer EML3 may have a peak wavelength of less than 610 nm, and the first light-emitting layer EML1, the second light-emitting layer EML2, and the third light-emitting layer EML3 may not emit light with a peak wavelength of about 610 nm to about 680 nm, i.e., red light.

[0098] In some embodiments, the first light-emitting layer EML1, the second light-emitting layer EML2, and the third light-emitting layer EML3 may emit light of a first color, namely, blue light. For example, the first light-emitting layer EML1, the second light-emitting layer EML2, and the third light-emitting layer EML3 may all be blue light-emitting layers and may include organic materials.

[0099] In some embodiments, at least one of the first emissive layer EML1, the second emissive layer EML2, and the third emissive layer EML3 can emit first blue light with a first peak wavelength, and other emissive layers (other plurality of emissive layers) can emit second blue light with a second peak wavelength different from the first peak wavelength. For example, one of the first emissive layer EML1, the second emissive layer EML2, and the third emissive layer EML3 can emit first blue light with a first peak wavelength, and the other two emissive layers can emit second blue light with a second peak wavelength. That is, the emitted light L1 ultimately emitted by the emissive layer OL can be a mixture of a first component L11 and a second component L12, where the first component L11 can be first blue light with a first peak wavelength, and the second component L12 can be second blue light with a second peak wavelength.

[0100] In some embodiments, one of the first peak wavelength and the second peak wavelength may be in the range of about 440 nm to about 460 nm, and the other peak wavelength may be in the range of about 460 nm to about 480 nm. However, there are no particular limitations on the first peak wavelength and the second peak wavelength. In other embodiments, both the first peak wavelength and the second peak wavelength may include 460 nm. In some embodiments, one of the first blue light and the second blue light may be dark blue light, and the other blue light may be sky blue light.

[0101] In some embodiments, the emitted light L1 from the emissive layer OL can be blue light and may include both long-wavelength and short-wavelength components. Therefore, the emissive layer OL can emit blue light with a wide range of emission peaks as emitted light L1. As a result, color visibility at a side viewing angle is improved compared to conventional light-emitting elements that emit blue light with sharp emission peaks.

[0102] In some embodiments, each of the first light-emitting layer EML1, the second light-emitting layer EML2, and the third light-emitting layer EML3 may include a host and a dopant. The material of the host is not particularly limited. For example, tris(8-hydroxyquinoline)aluminum (Alq3), 4,4'-bis(N-carbazolyl)-1,1'-biphenyl (CBP), poly(N-vinylcarbazole) (PVK), 9,10-bis(naphthyl-2-yl)anthracene (ADN), 4,4',4”-tris(carbazolyl-9-yl)-triphenylamine (TCTA), 1,3,5-tris(N-phenylbenzimidazolyl-2-yl)benzene (TPBi), 3-tert-butyl-9,10-bis(naphthyl-2-yl)anthracene (TBADN), stilbene aromatic hydrocarbons (DSA), 4,4'-bis(9-carbazolyl)-2,2'-dimethyl-biphenyl (CDBP), or 2-methyl-9,10-bis(naphthyl-2-yl)anthracene (MADN) can be used as the main body.

[0103] For example, each of the first emitting layer EML1, the second emitting layer EML2, and the third emitting layer EML3 that emits blue light may include a fluorescent material comprising one of the following groups: spiro-DPVBi, spiro-6P, stilbene-phenylene (DSB), DSA, polyfluorene (PFO) polymers, and poly(p-phenylenevinylene) (PPV) polymers. In another example, each of the first emitting layer EML1, the second emitting layer EML2, and the third emitting layer EML3 may include a phosphorescent material comprising an organometallic complex (such as (4,6-F2ppy)2Irpic).

[0104] As mentioned above, at least one of the first emissive layer EML1, the second emissive layer EML2, and the third emissive layer EML3 can emit blue light with a wavelength range different from the other emissive layers (the other plurality of emissive layers). To emit blue light with different wavelength ranges, the first emissive layer EML1, the second emissive layer EML2, and the third emissive layer EML3 can be formed of the same material, but the resonant distances of the first emissive layer EML1, the second emissive layer EML2, and the third emissive layer EML3 can be controlled (e.g., controlled to be different from each other). Alternatively, to emit blue light with different wavelength ranges, at least one of the first emissive layer EML1, the second emissive layer EML2, and the third emissive layer EML3 may comprise a material different from the other emissive layers (the other plurality of emissive layers).

[0105] In other embodiments, one of the first emissive layer EML1, the second emissive layer EML2, and the third emissive layer EML3 may emit a first blue light having a first peak wavelength, another of the first emissive layer EML1, the second emissive layer EML2, and the third emissive layer EML3 may emit a second blue light having a second peak wavelength different from the first peak wavelength, and other (e.g., the remaining) emissive layers may emit a third blue light having a third peak wavelength different from the first and second peak wavelengths. In other embodiments, one of the first, second, and third peak wavelengths may be in the range of about 440 nm to about 460 nm, another of the first, second, and third peak wavelengths may be in the range of about 460 nm to about 470 nm, and other (e.g., the remaining) peak wavelengths may be in the range of about 470 nm to about 480 nm.

[0106] In other embodiments, the emitted light L1 from the emissive layer OL is blue light and includes long-wavelength, medium-wavelength, and short-wavelength components. Therefore, the emissive layer OL can emit blue light with a wide range of emission peaks as emitted light L1. As a result, color visibility at a side viewing angle is improved compared to conventional light-emitting elements that emit blue light with sharp emission peaks.

[0107] According to other embodiments, optical efficiency can be improved and a longer lifetime (e.g., long lifespan) can be achieved compared to conventional light-emitting elements that do not employ a tandem structure in which multiple light-emitting layers are stacked.

[0108] In other embodiments, the materials of the first light-emitting layer EML1, the second light-emitting layer EML2, and the third light-emitting layer EML3 may be the same as those described above, and therefore, their detailed description will be omitted.

[0109] In other embodiments, at least one of the first emissive layer EML1, the second emissive layer EML2, and the third emissive layer EML3 can emit light of a first color, such as blue light, and other emissive layers (the other plurality of emissive layers) can emit light of a third color, such as green light. Here, the peak wavelength of the blue light emitted by at least one of the first emissive layer EML1, the second emissive layer EML2, and the third emissive layer EML3 can be in the range of about 440 nm to about 480 nm or about 460 nm to about 480 nm, and the peak wavelength of the green light emitted by the other emissive layers (the other plurality of emissive layers) can be in the range of about 510 nm to about 550 nm.

[0110] For example, one of the first emitting layer EML1, the second emitting layer EML2, and the third emitting layer EML3 can be a green emitting layer, and the other two emitting layers can be blue emitting layers. If two of the first emitting layer EML1, the second emitting layer EML2, and the third emitting layer EML3 are blue emitting layers, the blue light emitted by the blue emitting layer can have the same peak wavelength range or different peak wavelength ranges. In another example, two of the first emitting layer EML1, the second emitting layer EML2, and the third emitting layer EML3 can be green emitting layers, and the other emitting layers can be blue emitting layers.

[0111] In other embodiments, the emitted light L1 from the emissive layer OL may be a mixture of a first component L11 (i.e., blue light) and a second component L12 (i.e., green light). For example, in the case where the first component L11 is deep blue light and the second component L12 is green light, the emitted light L1 may be sky blue light. In other embodiments, as in (e.g., similar to) some of the embodiments described above, the emitted light L1 is a mixture of blue and green light, and includes both long-wavelength and short-wavelength components. Therefore, the emissive layer OL can emit blue light with a wide range of emission peaks as emitted light L1. As a result, color visibility at a side viewing angle is improved compared to conventional light-emitting elements that emit blue light with sharp emission peaks. Moreover, since the second component L12 of the emitted light L1 is green light, the green light component of the light supplied to the outside of the display device 1 can be appropriately compensated, and as a result, the color reproduction of the display device 1 is improved.

[0112] In other embodiments, the green light-emitting layers (multiple layers) among the first light-emitting layer EML1, the second light-emitting layer EML2, and the third light-emitting layer EML3 may include a substrate and a dopant, and the material of the substrate of the green light-emitting layer is not particularly limited. For example, Alq3, CBP, PVK, ADN, TCTA, TPBi, TBADN, DSA, CDBP, or MADN can be used as the substrate of the green light-emitting layer.

[0113] For example, the dopants in the green light-emitting layer can be fluorescent materials containing Alq3, or phosphorescent materials such as Ir(ppy)3 (planar tris(2-phenylpyridine)iridium), Ir(ppy)2(acac) (bis(2-phenylpyridine)(acetylacetone)iridium(III)) or Ir(mpyp)3 (2-phenyl-4-methylpyridineiridium).

[0114] A first charge generation layer CGL1 may be disposed between a first stack ST1 and a second stack ST2. The first charge generation layer CGL1 injects charge into a first light-emitting layer EML1 and a second light-emitting layer EML2. The first charge generation layer CGL1 controls the charge balance between the first stack ST1 and the second stack ST2. The first charge generation layer CGL1 may include an n-type charge generation layer CGL11 and a p-type charge generation layer CGL12. The p-type charge generation layer CGL12 may be disposed on the n-type charge generation layer CGL11 and between the n-type charge generation layer CGL11 and the second stack ST2.

[0115] The first charge generation layer CGL1 may have a structure in which an n-type charge generation layer CGL11 and a p-type charge generation layer CGL12 are combined. The n-type charge generation layer CGL11 is positioned closer to the first anode electrode AE1, the second anode electrode AE2, and the third anode electrode AE3 than the cathode electrode CE. The p-type charge generation layer CGL12 is positioned closer to the first anode electrode AE1, the second anode electrode AE2, and the third anode electrode AE3 than the cathode electrode CE. The n-type charge generation layer CGL11 provides electrons to the first light-emitting layer EML1 adjacent to the first anode electrode AE1, the second anode electrode AE2, and the third anode electrode AE3, and the p-type charge generation layer CGL12 provides holes to the second light-emitting layer EML2 included in the second stack ST2. The first charge generation layer CGL1 is disposed between the first stack ST1 and the second stack ST2 and provides charge to the first light-emitting layer EML1 and the second light-emitting layer EML2, thereby improving emission efficiency and reducing the driving voltage.

[0116] The first stack ST1 may be disposed on the first anode electrode AE1, the second anode electrode AE2 and the third anode electrode AE3, and may further include a first hole transport layer HTL1, a first electron blocking layer BIL1 and a first electron transport layer ETL1.

[0117] A first hole transport layer HTL1 may be disposed on a first anode electrode AE1, a second anode electrode AE2, and a third anode electrode AE3. The first hole transport layer HTL1 facilitates hole transport and may include a hole transport material. The hole transport material may include carbazole derivatives (such as N-phenylcarbazole or polyvinylcarbazole), fluorene derivatives, triphenylamine derivatives (such as N,N'-bis(3-methylphenyl)-N,N'-diphenyl-[1,1-biphenyl]-4,4'-diamine (TPD) or TCTA), N,N'-bis(1-naphthyl)-N,N'-diphenylbenzidine (NPB), or 4,4′-cyclohexylenebis[N,N-bis(4-methylphenyl)aniline] (TAPC), but this disclosure is not limited thereto. In some embodiments, the first hole transport layer HTL1 may be formed as a single layer. Alternatively, in other embodiments, the first hole transport layer HTL1 may be formed as multiple layers, in which case the multiple layers may include different materials.

[0118] A first electron blocking layer BIL1 may be disposed on the first hole transport layer HTL1 and between the first hole transport layer HTL1 and the first light-emitting layer EML1. The first electron blocking layer BIL1 may include a hole transport material and a metal or metal oxide to prevent or substantially prevent electrons generated in the first light-emitting layer EML1 from penetrating into the first hole transport layer HTL1. In some embodiments, the first hole transport layer HTL1 and the first electron blocking layer BIL1 may each be formed as a single layer, but this disclosure is not limited thereto. In other embodiments, the first electron blocking layer BIL1 may not be provided.

[0119] The first electron transport layer ETL1 may be disposed on the first light-emitting layer EML1 and between the first charge generation layer CGL1 and the first light-emitting layer EML1. In some embodiments, the first electron transport layer ETL1 may include electron transport materials such as Alq3, TPBi, 2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline (BCP), 4,7-diphenyl-1,10-phenanthroline (Bphen), 3-(4-biphenyl)-4-phenyl-5-tert-butylphenyl-1,2,4-triazole (TAZ), 4-(naphthyl-1-yl)-3,5-diphenyl-4H-1,2,4-triazole (NTAZ), 2-(4-biphenyl)-5-(4-tert-butylphenyl)-1,3,4-oxadiazole (tBu-PBD), bis(2-methyl-8-hydroxyquinoline-N1,O8)-(1,1'-biphenyl-4-hydroxy)aluminum (BAlq), bis(10-hydroxy-benzoquinoline)beryllium (Bebq2), ADN, or mixtures thereof, but this disclosure is not limited thereto. In some embodiments, the first electron transport layer ETL1 may be formed as a single layer. In other embodiments, the first electron transport layer ETL1 may be formed as multiple layers, in which case the multiple layers may comprise different materials.

[0120] The second stack ST2 may be disposed on the first charge generation layer CGL1, and may further include a second hole transport layer HTL2, a second electron blocking layer BIL2, and a second electron transport layer ETL2.

[0121] A second hole transport layer HTL2 may be disposed on the first charge generation layer CGL1. The second hole transport layer HTL2 may be formed of the same material as the first hole transport layer HTL1, or may include at least one of the exemplary materials selected from those included in the first hole transport layer HTL1 described above. The second hole transport layer HTL2 may be formed as a single layer. Alternatively, the second hole transport layer HTL2 may be formed as multiple layers, in which case the multiple layers may include different materials.

[0122] A second electron blocking layer BIL2 may be disposed on the second hole transport layer HTL2 and between the second hole transport layer HTL2 and the second light-emitting layer EML2. The second electron blocking layer BIL2 may be formed of the same material and structure as the first electron blocking layer BIL1, or may include at least one of the exemplary materials described above that may be included in the first electron blocking layer BIL1. In some embodiments, a second electron blocking layer BIL2 may not be provided.

[0123] A second electron transport layer ETL2 may be disposed on the second light-emitting layer EML2 and between the second charge-generating layer CGL2 and the second light-emitting layer EML2. The second electron transport layer ETL2 may be formed of the same material and structure as the first electron transport layer ETL1, or may include at least one of the exemplary materials described above that may be included in the first electron transport layer ETL1. The second electron transport layer ETL2 may be formed as a single layer. Alternatively, the second electron transport layer ETL2 may be formed as multiple layers, in which case the multiple layers may include different materials.

[0124] The second charge generation layer CGL2 may be disposed on the second stack ST2 and between the second stack ST2 and the third stack ST3.

[0125] The second charge generation layer CGL2 may have the same structure as the first charge generation layer CGL1. For example, the second charge generation layer CGL2 may include an n-type charge generation layer CGL21 disposed adjacent to the second stack ST2 and a p-type charge generation layer CGL22 disposed adjacent to the cathode electrode CE. The p-type charge generation layer CGL22 may be disposed on the n-type charge generation layer CGL21.

[0126] The second charge-generating layer CGL2 may have a structure in which an n-type charge-generating layer CGL21 and a p-type charge-generating layer CGL22 are combined together. The first charge-generating layer CGL1 and the second charge-generating layer CGL2 may be formed of different materials or may be formed of the same material.

[0127] The third stack ST3 may be disposed on the second charge generation layer CGL2, and may further include a third hole transport layer HTL3 and a third electron transport layer ETL3.

[0128] A third hole transport layer HTL3 may be disposed on the second charge generation layer CGL2. The third hole transport layer HTL3 may be formed of the same material as the first hole transport layer HTL1, or may include at least one of the exemplary materials selected from those included in the first hole transport layer HTL1 described above. The third hole transport layer HTL3 may be formed as a single layer. Alternatively, the third hole transport layer HTL3 may be formed as multiple layers, in which case the multiple layers may include different materials.

[0129] A third electron transport layer ETL3 may be disposed on the third light-emitting layer EML3 and between the cathode electrode CE and the third light-emitting layer EML3. The third electron transport layer ETL3 may be formed of the same material and structure as the first electron transport layer ETL1, or may include at least one of the exemplary materials described above that may be included in the first electron transport layer ETL1. The third electron transport layer ETL3 may be formed as a single layer. Alternatively, the third electron transport layer ETL3 may be formed as multiple layers, in which case the multiple layers may include different materials.

[0130] In one embodiment, a hole injection layer (HIL, not shown) may be further disposed between the first stack ST1 and the first anode electrode AE1, between the second stack ST2 and the first charge generation layer CGL1, and / or between the third stack ST3 and the second charge generation layer CGL2. The HIL facilitates hole injection into the first light-emitting layer EML1, the second light-emitting layer EML2, and the third light-emitting layer EML3. In some embodiments, the HIL may be formed from at least one selected from copper phthalocyanine (CuPc), poly(3,4)-vinyldioxythiophene (PEDOT), polyaniline (PANI), and N,N'-dinathyl-N,N'-diphenylbenzidine (NPD), but this disclosure is not limited thereto. In some embodiments, the HIL may be disposed between the first stack ST1 and the first anode electrode AE1, between the second stack ST2 and the first charge generation layer CGL1, and between the third stack ST3 and the second charge generation layer CGL2.

[0131] In one embodiment, an electron injection layer (EIL, not shown) may be further disposed between the third electron transport layer ETL3 and the cathode electrode CE, between the second charge generation layer CGL2 and the second stack ST2, and / or between the first charge generation layer CGL1 and the first stack ST1. The EIL may facilitate electron injection and may include Alq3, PBD, TAZ, spiro-PBD, BAlq, or SAlq, but this disclosure is not limited thereto. Furthermore, the EIL may include metal halide compounds and may include, for example, at least one selected from the group consisting of MgF2, LiF, NaF, KF, RbF, CsF, FrF, LiI, NaI, KI, RbI, CsI, FrI, and CaF2, but this disclosure is not limited thereto. Moreover, the EIL may include lanthanide materials such as Yb, Sm, or Eu. Furthermore, the EIL can comprise both metal halide materials and lanthanide materials (e.g., RbI:Yb or KI:Yb), in which case the EIL can be formed by co-depositing the metal halide material and the lanthanide material. In some embodiments, the EIL can be disposed between the third electron transport layer ETL3 and the cathode electrode CE, between the second charge generation layer CGL2 and the second stack ST2, and between the first charge generation layer CGL1 and the first stack ST1.

[0132] The structure of the luminescent layer OL can be appropriately varied. For example, the luminescent layer OL can be modified as follows: Figure 7 The luminescent layer OLa. Unlike... Figure 6 The luminescent layer OL, Figure 7 The light-emitting layer OLa may further include a fourth stack ST4 and a third charge-generating layer CGL3 disposed between the third stack ST3 and the second stack ST2.

[0133] The fourth stack ST4 may include a fourth light-emitting layer EML4, and may further include a fourth hole transport layer HTL4, a third electron blocking layer BIL3, and a fourth electron transport layer ETL4.

[0134] The first emitting layer EML1, the second emitting layer EML2, the third emitting layer EML3, and the fourth emitting layer EML4 can emit light of a first color, such as blue light. At least one of the first emitting layer EML1, the second emitting layer EML2, the third emitting layer EML3, and the fourth emitting layer EML4, and at least another of the first emitting layer EML1, the second emitting layer EML2, the third emitting layer EML3, and the fourth emitting layer EML4 can emit blue light with different peak wavelength ranges.

[0135] Alternatively, at least one of the first light-emitting layer EML1, the second light-emitting layer EML2, the third light-emitting layer EML3, and the fourth light-emitting layer EML4 may emit green light, and at least another of the first light-emitting layer EML1, the second light-emitting layer EML2, the third light-emitting layer EML3, and the fourth light-emitting layer EML4 may emit blue light.

[0136] A fourth hole transport layer HTL4 may be disposed on the second charge generation layer CGL2. The fourth hole transport layer HTL4 may be formed of the same material as the first hole transport layer HTL1, or may include at least one of the exemplary materials selected from those described above that may be included in the first hole transport layer HTL1. The fourth hole transport layer HTL4 may be formed as a single layer. Alternatively, the fourth hole transport layer HTL4 may be formed as multiple layers, in which case the multiple layers may include different materials.

[0137] A third electron blocking layer (BIL3) may be disposed on the fourth hole transport layer (HTL4) and between the fourth hole transport layer (HTL4) and the fourth light-emitting layer (EML4). The third electron blocking layer (BIL3) may be formed of the same material and structure as the first electron blocking layer (BIL1), or may include at least one of the exemplary materials described above that may be included in the first electron blocking layer (BIL1). In some embodiments, a third electron blocking layer (BIL3) may not be provided.

[0138] A fourth electron transport layer ETL4 may be disposed on the fourth light-emitting layer EML4 and between the third charge-generating layer CGL3 and the fourth light-emitting layer EML4. The fourth electron transport layer ETL4 may be formed of the same material and structure as the first electron transport layer ETL1, or may include at least one of the exemplary materials described above that may be included in the first electron transport layer ETL1. The fourth electron transport layer ETL4 may be formed as a single layer. Alternatively, the fourth electron transport layer ETL4 may be formed as multiple layers, in which case the multiple layers may include different materials.

[0139] The third charge generation layer CGL3 may have the same structure as the first charge generation layer CGL1. For example, the third charge generation layer CGL3 may include an n-type charge generation layer CGL31 disposed adjacent to the fourth stack ST4 and a p-type charge generation layer CGL32 disposed adjacent to the cathode electrode CE. The p-type charge generation layer CGL32 may be disposed on the n-type charge generation layer CGL31.

[0140] In one embodiment, the EIL may be further disposed between the fourth stack ST4 and the third charge generation layer CGL3, and the HIL may be further disposed between the fourth stack ST4 and the second charge generation layer CGL2.

[0141] Figure 6 The light-emitting layer OL and Figure 7 The emitting layer OLa may not include a red emitting layer and therefore may not emit light of a second color, such as red light. That is, the emitted light L1 may not include any component with a peak wavelength of about 610 nm to about 650 nm.

[0142] like Figures 5 to 9 As shown, a thin-film encapsulation layer 170 is disposed on the cathode electrode CE. The thin-film encapsulation layer 170 is commonly disposed within the first light-emitting region LA1, the second light-emitting region LA2, and the third light-emitting region LA3, and also within the non-light-emitting region NLA. In some embodiments, the thin-film encapsulation layer 170 may directly cover the cathode electrode CE. In some embodiments, a capping layer (not shown) covering the cathode electrode CE may be further disposed between the thin-film encapsulation layer 170 and the cathode electrode CE; in this case, the thin-film encapsulation layer 170 may directly cover the capping layer.

[0143] In some embodiments, the thin-film encapsulation layer 170 may include a first encapsulation inorganic film 171, an encapsulation organic film 173, and a second encapsulation inorganic film 175 sequentially stacked on the cathode electrode CE.

[0144] In some embodiments, the first encapsulation inorganic film 171 and the second encapsulation inorganic film 175 may be formed 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), or lithium fluoride.

[0145] In some embodiments, the encapsulating organic film 173 may be formed from acrylic resin, methacrylic resin, polyisoprene, vinyl resin, epoxy resin, urethane resin, cellulose resin or perylene resin.

[0146] The structure of the thin-film encapsulation layer 170 is not particularly limited and can be varied appropriately.

[0147] A panel light-shielding member 190 may be disposed on the thin-film encapsulation layer 170. The panel light-shielding member 190 may be disposed on the thin-film encapsulation layer 170 and may be located in the non-emitting area NLA. The panel light-shielding member 190 can prevent or reduce light penetration between adjacent emitting areas (LA1, LA2, LA3, LA4, LA5, and LA6) to prevent or reduce color mixing, and as a result, can further improve color reproduction.

[0148] In some embodiments, the panel light-shielding member 190 may be located in the non-light-emitting area NLA, and may be configured in a plan view to surround the light-emitting areas (LA1, LA2, LA3, LA4, LA5 and LA6).

[0149] The panel light-shielding member 190 may include an organic light-shielding material and may be formed by coating the organic light-shielding material and exposing the organic light-shielding material to exposure (e.g., exposure to light).

[0150] The following will refer to Figures 12 to 15 And refer to again Figures 5 to 11 Description of color conversion substrate 30.

[0151] Figure 12 It is shown Figure 1 A plan view of the arrangement of the first color filter and color pattern in the color conversion substrate of the display device. Figure 13 It is shown Figure 1 A plan view of the arrangement of light-shielding components in the color conversion substrate of the display device. Figure 14 It is shown Figure 1 A plan view of the arrangement of the second and third color filters in the color conversion substrate of the display device, and Figure 15 It is shown Figure 1 A plan view of the arrangement of the first wavelength conversion pattern, the second wavelength conversion pattern, and the light-transmitting pattern in the color conversion substrate of the display device.

[0152] refer to Figures 5 to 15 The second substrate member 310 may be formed of a transparent material. In some embodiments, the second substrate member 310 may be a glass substrate or a plastic substrate. When the second substrate member 310 is a plastic substrate, the second substrate member 310 may be flexible. In some embodiments, the second substrate member 310 may include a glass substrate or a plastic substrate, and may further include a separate layer disposed on the glass substrate or plastic substrate, such as a buffer layer or an insulating layer (not shown).

[0153] In some embodiments, as mentioned above, the light-transmitting areas (TA1, TA2, TA3, TA4, TA5 and TA6) and the light-blocking area BA may be defined on the second substrate member 310.

[0154] refer to Figure 5 and Figures 8 to 12 The first color filter 231 and the color pattern 250 may be disposed on the first surface of the second base member 310 facing the display substrate 10.

[0155] A first color filter 231 may be disposed on a first surface of the second substrate member 310 and may be located in the first light-transmitting area TA1 and the fourth light-transmitting area TA4. In some embodiments, the first color filter 231 in the first light-transmitting area TA1 and the first color filter 231 in the fourth light-transmitting area TA4 may be separated from each other in the second direction D2. In some embodiments, a seventh color pattern 257 may be disposed between the first color filter 231 in the first light-transmitting area TA1 and the first color filter 231 in the fourth light-transmitting area TA4. The seventh color pattern 257 may be connected to the first color filter 231.

[0156] The first color filter 231 can selectively transmit light of a first color (e.g., blue light) and can block or absorb light of a second color (e.g., red light) and a third color (e.g., green light). In some embodiments, the first color filter 231 may be a blue color filter and may include a blue colorant such as a blue dye or pigment. As used herein, the term "colorant" includes both dyes and pigments.

[0157] In a display device, most of the external light is reflected, which causes distortion in the color reproduction of the color conversion substrate 30. However, when the color pattern 250 according to an embodiment of the present disclosure is provided on the first surface of the second substrate member 310, the color pattern 250 can absorb some of the external light introduced into the color conversion substrate 30 from outside the display device 1, and thus reduce the amount of reflected external light. Therefore, color distortion caused by the reflection of external light can be reduced.

[0158] In some embodiments, the color pattern 250 may include a blue colorant, such as a blue dye or pigment. In some embodiments, the color pattern 250 may be formed of the same material as the first color filter 231 and may be formed during the formation of the first color filter 231. That is, the first color filter 231 and the color pattern 250 may be formed simultaneously (e.g., at the same time) by applying a photosensitive organic material including a blue colorant to a first surface of the second substrate member 310 and subjecting the photosensitive organic material to exposure and development.

[0159] In some embodiments, the thickness TH2 of the color pattern 250 in the third direction D3 may be substantially the same as the thickness TH1 of the first color filter 231 in the third direction D3. Where the color pattern 250 includes a blue colorant, external light or reflected light passing through the color pattern 250 may have a blue wavelength range. The color sensitivity of the eye (e.g., a user's eye) varies depending on the color of light. Specifically, light in the blue wavelength range may be perceived less sensitively than light in the green or red wavelength range. Therefore, because the color pattern 250 includes a blue colorant, the user may perceive reflected light less sensitively. That is, reflected light is less perceptible to the user.

[0160] The color pattern 250 may be disposed on the first surface of the second substrate member 310 and may be located in the light-blocking area BA. Furthermore, the color pattern 250 may be configured to overlap with the non-emitting area NLA. In some embodiments, the color pattern 250 may be in direct contact with the first surface of the second substrate member 310. Moreover, where a separate buffer layer (not shown) is provided on the first surface of the second substrate member 310 to prevent or reduce the penetration of impurities, the color pattern 250 may also be in direct contact with the buffer layer.

[0161] In some embodiments, the color pattern 250 may be disposed throughout the entire light-blocking area BA. In some embodiments, the color pattern 250 may include a first color pattern 251 disposed in the first light-blocking area BA1, a second color pattern 252 disposed in the second light-blocking area BA2, a third color pattern 253 disposed in the third light-blocking area BA3, a fourth color pattern 254 disposed in the fourth light-blocking area BA4, a fifth color pattern 255 disposed in the fifth light-blocking area BA5, a sixth color pattern 256 disposed in the sixth light-blocking area BA6, and a seventh color pattern 257 disposed in the seventh light-blocking area BA7. In some embodiments, the seventh color pattern 257 may be connected to the first color pattern 251, the second color pattern 252, the third color pattern 253, the fourth color pattern 254, the fifth color pattern 255, and the sixth color pattern 256.

[0162] Furthermore, the color pattern 250 can be connected to the first color filter 231.

[0163] like Figure 5 , Figures 8 to 11 and Figure 13 As shown, the light-shielding member 220 may be disposed on the first surface of the second substrate member 310 facing the display substrate 10. The light-shielding member 220 may be disposed in the light-blocking region BA and may block the transmission of light. In some embodiments, the light-shielding member 220 may be arranged in a substantially lattice structure in a plan view, such as... Figure 13 As shown.

[0164] In some embodiments, the light-shielding member 220 may include an organic light-shielding material and may be formed by coating the organic light-shielding material and exposing the organic light-shielding material to exposure (e.g., exposure to light).

[0165] As mentioned above, external light can distort the color reproducibility of the color conversion substrate 30. However, when the light-shielding member 220 is disposed on the first surface of the second substrate member 310, at least some of the external light can be absorbed by the light-shielding member 220. As a result, color distortion caused by reflection of external light can be reduced. In some embodiments, the light-shielding member 220 can prevent or reduce light penetration between adjacent light-emitting areas to prevent or reduce color mixing, and as a result, color reproducibility can be further improved.

[0166] In some embodiments, the light-shielding member 220 may include a first light-shielding member 221 disposed in a first light-blocking area BA1, a second light-shielding member 222 disposed in a second light-blocking area BA2, a third light-shielding member 223 disposed in a third light-blocking area BA3, a fourth light-shielding member 224 disposed in a fourth light-blocking area BA4, a fifth light-shielding member 225 disposed in a fifth light-blocking area BA5, a sixth light-shielding member 226 disposed in a sixth light-blocking area BA6, and a seventh light-shielding member 227 disposed in a seventh light-blocking area BA7. In some embodiments, the first light-shielding member 221, the second light-shielding member 222, and the third light-shielding member 223 may be connected to the seventh light-shielding member 227, and the fourth light-shielding member 224, the fifth light-shielding member 225, and the sixth light-shielding member 226 may also be connected to the seventh light-shielding member 227.

[0167] The light-shielding member 220 may be disposed below the color pattern 250. In some embodiments, the first light-shielding member 221 may be disposed below the first color pattern 251, the second light-shielding member 222 may be disposed below the second color pattern 252, the third light-shielding member 223 may be disposed below the third color pattern 253, the fourth light-shielding member 224 may be disposed below the fourth color pattern 254, the fifth light-shielding member 225 may be disposed below the fifth color pattern 255, the sixth light-shielding member 226 may be disposed below the sixth color pattern 256, and the seventh light-shielding member 227 may be disposed below the seventh color pattern 257.

[0168] Color pattern 250 is disposed between light-shielding member 220 and second base member 310, and therefore, in some embodiments, light-shielding member 220 may not contact second base member 310.

[0169] like Figure 5 , Figures 8 to 11 and Figure 14As shown, the second color filter 233 and the third color filter 235 may be disposed on the first surface of the second base member 310 facing the display substrate 10.

[0170] The second color filter 233 can be disposed in the second light-transmitting area TA2 and the fifth light-transmitting area TA5, and the third color filter 235 can be disposed in the third light-transmitting area TA3 and the sixth light-transmitting area TA6.

[0171] like Figure 5 As shown, in some embodiments, the first side of the second color filter 233 may be located in the first light-blocking area BA1 and may be disposed below the first color pattern 251 and the first light-blocking member 221. Moreover, in some embodiments, the second side of the second color filter 233 may be located in the second light-blocking area BA2 and may be disposed below the second color pattern 252 and the second light-blocking member 222.

[0172] like Figure 5 As shown, in some embodiments, the first side of the third color filter 235 may be located in the second light-blocking area BA2 and may be disposed below the second color pattern 252 and the second light-blocking member 222. Moreover, in some embodiments, the second side of the third color filter 235 may be located in the third light-blocking area BA3 and may be disposed below the third color pattern 253 and the third light-blocking member 223.

[0173] like Figures 9 to 11 and Figure 14 As shown, in some embodiments, the second color filter 233 and the third color filter 235 may be arranged as strips extending in the second direction D2 and may extend across the seventh light-blocking region BA7 between the first row RT1 and the second row RT2. Therefore, in the seventh light-blocking region BA7, the second color filter 233 and the third color filter 235 may be disposed below the seventh light-blocking member 227 and may respectively cover the seventh color pattern 257 and the seventh light-blocking member 227 along the second direction D2, but this disclosure is not limited thereto. In other embodiments, the second color filter 233 and / or the third color filter 235 may be formed as island patterns separated in the second direction D2.

[0174] The second color filter 233 can block or absorb light of the first color (e.g., blue light). That is, the second color filter 233 can be used as a blue light filter capable of blocking blue light. In some embodiments, the second color filter 233 can selectively transmit light of the second color (e.g., red light) and can block or absorb light of the first color (e.g., blue light) and light of the third color (e.g., green light). For example, the second color filter 233 can be a red color filter and may include a red colorant such as a red dye or pigment.

[0175] The third color filter 235 can block or absorb light of the first color (e.g., blue light). That is, the third color filter 235 can also be used as a blue light filter. In some embodiments, the third color filter 235 can selectively transmit light of the third color (e.g., green light) and can block or absorb light of the first color (e.g., blue light) and the second color (e.g., red light). For example, the third color filter 235 can be a green color filter and may include a green colorant such as a green dye or pigment.

[0176] like Figure 5 and Figures 8 to 13 As shown, a first cover layer 391 covering the light-shielding member 220, the color pattern 250, the first color filter 231, the second color filter 233, and the third color filter 235 may be disposed on the first surface of the second base member 310. In some embodiments, the first cover layer 391 may be in direct contact with the first color filter 231, the second color filter 233, and the third color filter 235.

[0177] The first sealing layer 391 may further contact the light-shielding member 220. For example, as Figure 5 As shown, in the first light-blocking area BA1, the first light-blocking member 221 can directly contact the first sealing layer 391; in the second light-blocking area BA2, the second light-blocking member 222 can directly contact the first sealing layer 391; and in the third light-blocking area BA3, the third light-blocking member 223 can directly contact the first sealing layer 391. Furthermore, as... Figure 8 As shown, in the seventh light-blocking area BA7, the seventh light-blocking member 227 can also contact the first sealing layer 391.

[0178] The first cover layer 391 prevents or substantially prevents the light-shielding member 220, color pattern 250, first color filter 231, second color filter 233, and third color filter 235 from being damaged or contaminated by moisture or air penetrating from the outside of the display device 1. Furthermore, the first cover layer 391 prevents or substantially prevents the colorants of the first color filter 231, second color filter 233, and third color filter 235 from diffusing to other elements, such as the first wavelength conversion pattern 340 and the second wavelength conversion pattern 350. In some embodiments, the first cover layer 391 may be formed of an inorganic material. For example, the first cover layer 391 may include silicon nitride, aluminum nitride, zirconium nitride, titanium nitride, hafnium nitride, tantalum nitride, silicon oxide, aluminum oxide, titanium oxide, tin oxide, cerium oxide, or silicon oxynitride.

[0179] like Figure 5 , Figures 8 to 11 and Figure 15 As shown, the light-transmitting pattern 330, the first wavelength conversion pattern 340, and the second wavelength conversion pattern 350 can be disposed below the first cover layer 391.

[0180] In some embodiments, the light-transmitting pattern 330, the first wavelength conversion pattern 340, and the second wavelength conversion pattern 350 can be formed by applying a photosensitive material and subjecting the photosensitive material to exposure and development, but this disclosure is not limited thereto. In other embodiments, the light-transmitting pattern 330, the first wavelength conversion pattern 340, and the second wavelength conversion pattern 350 can be formed by inkjet printing.

[0181] The light-transmitting pattern 330 can be disposed below the first cover layer 391, and can be located in the first light-transmitting area TA1 and the fourth light-transmitting area TA4. In some embodiments, such as Figure 15 As shown, the light-transmitting pattern 330 may be formed as a strip extending in the second direction D2 and may extend across the seventh light-blocking region BA7 between the first row RT1 and the second row RT2, but this disclosure is not limited thereto. In other embodiments, the light-transmitting pattern 330 may be formed, for example, as an island pattern, so that the light-transmitting pattern 330 in the first light-transmitting region TA1 may be separated from the light-transmitting pattern 330 in the fourth light-transmitting region TA4.

[0182] The light-transmitting pattern 330 can transmit incident light through it. As mentioned above, the emitted light L1 provided by the first light-emitting element ED1 can be a mixture of sky blue and dark blue light or a mixture of blue and green light. The component of the emitted light L1 in the blue wavelength range can penetrate (e.g., pass through) the light-transmitting pattern 330 and the first color filter 231 and can then be emitted from the display device 1. That is, the first light La emitted from the first light-transmitting area TA1 can be blue light.

[0183] In some embodiments, each of the light-transmitting patterns 330 may include a first base resin 331 and a first scatterer 333 dispersed in the first base resin 331.

[0184] The first base resin 331 may be formed of a material having high light transmittance. In some embodiments, the first base resin 331 may be formed of an organic material. For example, the first base resin 331 may include an epoxy resin, an acrylic resin, a cardo resin, or an imide resin.

[0185] The first scatterer 333 may have a different refractive index than 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 a light-scattering particle. The material of the first scatterer 333 is not particularly limited, as long as it can scatter at least some of the light passing through the light-transmitting pattern 330. For example, the first scatterer 333 may include metal oxide particles or organic particles. The metal oxide particles may be, for example, particles of titanium oxide (TiO2), zirconium oxide (ZrO2), aluminum oxide (Al2O3), indium oxide (In2O3), zinc oxide (ZnO), or tin oxide (SnO2), and the organic particles may be, for example, particles of acrylic resin or urethane resin. Regardless of the incident direction of the light, the first scatterer 333 can scatter light in any direction without substantially changing the wavelength of the light passing through the light-transmitting pattern 330.

[0186] The first wavelength conversion pattern 340 may be disposed below the first cover layer 391 and may be located in the second light-transmitting area TA2 and the fifth light-transmitting area TA5. In some embodiments, such as Figure 15 As shown, the first wavelength conversion pattern 340 may be formed as a strip extending in the second direction D2 and may extend across the seventh light-blocking region BA7 between the first row RT1 and the second row RT2, but this disclosure is not limited thereto. In other embodiments, the first wavelength conversion pattern 340 may be formed, for example, as an island pattern, so that the first wavelength conversion pattern 340 in the second light-transmitting region TA2 may be separated from the first wavelength conversion pattern 340 in the fifth light-transmitting region TA5.

[0187] The first wavelength conversion pattern 340 can convert or shift the peak wavelength of the incident light to a set or predetermined peak wavelength. In some embodiments, the first wavelength conversion pattern 340 can convert the emitted light L1 provided by the second light-emitting element ED2 into red light with a peak wavelength of about 610 nm to about 650 nm.

[0188] In some embodiments, each of the first wavelength conversion patterns 340 may include a second base resin 341 and a first wavelength shifter 345 dispersed in the second base resin 341, and may further include a second scatterer 343 dispersed in the second base resin 341.

[0189] The second base resin 341 may be formed of a material having high light transmittance. In some embodiments, the second base resin 341 may be formed of an organic material. In some embodiments, the second base resin 341 may be formed of the same material as the first base resin 331, or may include at least one of the exemplary materials described above that may be included in the first base resin 331.

[0190] The first wavelength shifter 345 can convert or shift the peak wavelength of the incident light to a set or predetermined peak wavelength. In some embodiments, the first wavelength shifter 345 can convert the emitted light L1 (e.g., blue light) provided by the second light-emitting element ED2 into red light with a single peak wavelength of about 610 nm to about 650 nm.

[0191] Examples of the first wavelength deflector 345 include quantum dots, quantum rods, and phosphors. For example, quantum dots can be particulate materials that emit light of a specific color in response to the transition of electrons from the conduction band to the valence band.

[0192] Quantum dots can be semiconductor nanocrystal materials. Because quantum dots have a set or predetermined band gap depending on their composition and size, they absorb light and emit light of a set or predetermined wavelength. Semiconductor nanocrystal materials include Group IV elements, Group IV compounds, Group II-VI compounds, Group III-V compounds, Group IV-VI compounds, and / or combinations thereof.

[0193] Group II-VI compounds may be selected from the group consisting of: binary compounds selected from CdSe, CdTe, ZnS, ZnSe, ZnTe, ZnO, HgS, HgSe, HgTe, MgSe, MgS and mixtures thereof; and compounds selected from InZnP, AgInS, CuInS, CdSeS, CdSeTe, CdSTe, ZnSeS, ZnSeTe, ZnSTe, HgSeS, HgSeTe, HgSTe, CdZnS, CdZn Ternary compounds selected from Se, CdZnTe, CdHgS, CdHgSe, CdHgTe, HgZnS, HgZnSe, HgZnTe, MgZnSe, MgZnS and mixtures thereof; and quaternary compounds selected from HgZnTeS, CdZnSeS, CdZnSeTe, CdZnSTe, CdHgSeS, CdHgSeTe, CdHgSTe, HgZnSeS, HgZnSeTe, HgZnSTe and mixtures thereof.

[0194] Group III-V compounds may be selected from the group consisting of: binary compounds selected from GaN, GaP, GaAs, GaSb, AlN, AlP, AlAs, AlSb, InN, InP, InAs, InSb and mixtures thereof; ternary compounds selected from GaNP, GaNAs, GaNSb, GaPAs, GaPSb, AlNP, AlNAs, AlNSb, AlPAs, AlPSb, InGaP, InNP, InAlP, InNAs, InNSb, InPAs, InPSb and mixtures thereof; and quaternary compounds selected from GaAlNP, GaAlNAs, GaAlNSb, GaAlPAs, GaAlPSb, GaInNP, GaInNAs, GaInNSb, GaInPAs, GaInPSb, InAlNP, InAlNAs, InAlNSb, InAlPAs, InAlPSb and mixtures thereof.

[0195] Group IV-VI compounds may be selected from the group consisting of: binary compounds selected from SnS, SnSe, SnTe, PbS, PbSe, PbTe, and mixtures thereof; ternary compounds selected from SnSeS, SnSeTe, SnSTe, PbSeS, PbSeTe, PbSTe, SnPbS, SnPbSe, SnPbTe, and mixtures thereof; and quaternary compounds selected from SnPbSSe, SnPbSeTe, SnPbSTe, and mixtures thereof. Group IV elements may be selected from the group consisting of: Si, Ge, and mixtures thereof. Group IV compounds may be binary compounds selected from SiC, SiGe, and mixtures thereof.

[0196] These binary, ternary, or quaternary compounds can be distributed throughout the particles at a uniform concentration or at partially different concentrations. Quantum dots can have a core-shell structure in which one quantum dot surrounds another. The interface between the core and shell of a quantum dot can have a concentration gradient in which the concentration of elements (multiple elements) in the shell of the quantum dot gradually decreases towards the center of the quantum dot.

[0197] In some embodiments, the quantum dot may have a core-shell structure comprising (e.g., consisting of) a core of the aforementioned semiconductor nanocrystal material and a shell surrounding the core. The shell of the quantum dot may serve as a protective layer to maintain the semiconductor properties of the quantum dot by preventing or reducing chemical degradation of the quantum dot's core, and / or as a charging layer to impart electrophoretic properties to the quantum dot. The shell of the quantum dot may have a monolayer or multilayer structure. The interface between the core and shell of the quantum dot may have a concentration gradient in which the concentration of elements (multiple elements) at the shell of the quantum dot gradually decreases towards the center of the quantum dot. The shell of the quantum dot may comprise a metal or non-metal oxide, a semiconductor compound, or a combination thereof.

[0198] For example, the metal or non-metal oxides may be binary compounds, such as SiO2, Al2O3, TiO2, ZnO, MnO, Mn2O3, Mn3O4, CuO, FeO, Fe2O3, Fe3O4, CoO, Co3O4 or NiO, or ternary compounds, such as MgAl2O4, CoFe2O4, NiFe2O4 or CoMn2O4, but this disclosure is not limited thereto.

[0199] For example, the semiconductor compound may be CdS, CdSe, CdTe, ZnS, ZnSe, ZnTe, ZnSeS, ZnTeS, GaAs, GaP, GaSb, HgS, HgSe, HgTe, InAs, InP, InGaP, InSb, AlAs, AlP, or AlSb, but this disclosure is not limited thereto.

[0200] The light emitted by the first wavelength shifter 345 can have a full width at half maximum (FMHM) of about 45 nm or less, about 40 nm or less, or about 30 nm or less, and therefore, the purity of the colors displayed by the display device 1 and the color reproducibility of the display device 1 can be further improved. Moreover, the first wavelength shifter 345 can emit light in all directions, regardless of the incident direction of the light. This improves the lateral visibility of the second color displayed in the second light-transmitting area TA2.

[0201] Some of the emitted light L1 provided by the second light-emitting element ED2 can be emitted as it passes through the first wavelength conversion pattern 340 without being converted into red light by the first wavelength deflector 345. The component of emitted light L1 that is incident on the second color filter 233 without being converted by the first wavelength conversion pattern 340 can be blocked by the second color filter 233. The red light obtained from the emitted light L1 by the first wavelength conversion pattern 340 can be emitted from the display device 1 through the second color filter 233. That is, the second light Lb emitted from the second light-transmitting area TA2 can be red light.

[0202] The second scatterer 343 may have a different refractive index than the second base resin 341 and may form an optical interface with the second base resin 341. For example, the second scatterer 343 may include light-scattering particles. The second scatterer 343 is substantially the same as or similar to the first scatterer 333, and therefore, its detailed description will be omitted.

[0203] The second wavelength conversion pattern 350 may be disposed below the first cover layer 391 and may be located in the third light-transmitting region TA3 and the sixth light-transmitting region TA6. In some embodiments, such as Figure 15As shown, the second wavelength conversion pattern 350 may be formed as a strip extending in the second direction D2 and may extend across the seventh light-blocking region BA7 between the first row RT1 and the second row RT2, but this disclosure is not limited thereto. In other embodiments, the second wavelength conversion pattern 350 may be formed, for example, as an island pattern, so that the second wavelength conversion pattern 350 in the third light-transmitting region TA3 may be separated from the second wavelength conversion pattern 350 in the sixth light-transmitting region TA6.

[0204] The second wavelength conversion pattern 350 can convert or shift the peak wavelength of the incident light to a set or predetermined peak wavelength. In some embodiments, the second wavelength conversion pattern 350 can convert the emitted light L1 provided by the third light-emitting element ED3 into green light with a peak wavelength of about 510 nm to about 550 nm.

[0205] In some embodiments, each of the second wavelength conversion patterns 350 may include a third base resin 351 and a second wavelength shifter 355 dispersed in the third base resin 351, and may further include a third scatterer 353 dispersed in the third base resin 351.

[0206] The third base resin 351 may be formed of a material having high light transmittance. In some embodiments, the third base resin 351 may be formed of an organic material. In some embodiments, the third base resin 351 may be formed of the same material as the first base resin 331 or may include at least one of the exemplary materials described above that may be included in the first base resin 331.

[0207] The second wavelength shifter 355 can convert or shift the peak wavelength of the incident light to a set or predetermined peak wavelength. In some embodiments, the second wavelength shifter 355 can convert blue light having a peak wavelength of about 440 nm to about 480 nm into green light having a single peak wavelength of about 510 nm to about 550 nm.

[0208] Examples of the second wavelength shifter 355 include quantum dots, quantum rods, and phosphors. The second wavelength shifter 355 is substantially the same as or similar to the first wavelength shifter 345, and therefore, its detailed description will be omitted.

[0209] In some embodiments, both the first wavelength shifter 345 and the second wavelength shifter 355 may be formed as quantum dots (e.g., formed from quantum dots). In this case, the particle size of the first wavelength shifter 345 may be larger than the particle size of the second wavelength shifter 355.

[0210] The third scatterer 353 may have a different refractive index than the third base resin 351 and may form an optical interface with the third base resin 351. For example, the third scatterer 353 may include light-scattering particles. The third scatterer 353 is substantially the same as or similar to the second scatterer 343, and therefore, its detailed description will be omitted.

[0211] The emitted light L1 from the third light-emitting element ED3 can be provided to the second wavelength conversion pattern 350, and the second wavelength shifter 355 can convert the emitted light L1 into green light with a peak wavelength of about 510 nm to about 550 nm.

[0212] When the emitted light L1 is blue light (or a mixture of dark blue and sky blue light), some of the emitted light L1 can be emitted as it passes through the second wavelength conversion pattern 350 without being converted into green light by the second wavelength deflector 355, and can be blocked by the third color filter 235. The green light obtained from the emitted light L1 by the second wavelength conversion pattern 350 can be emitted from the display device 1 through the third color filter 235. That is, the third light Lc emitted from the third light-transmitting area TA3 can be green light.

[0213] When the emitted light L1 is a mixture of deep blue and sky blue light, the emitted light L1 includes both long-wavelength and short-wavelength components, and therefore, the travel path of the emitted light L1 incident on the second wavelength conversion pattern 350 can be lengthened. As a result, the amount of emitted light L1 provided to the second wavelength shifter 355 can be increased, and the light conversion efficiency of the second wavelength conversion pattern 350 can also be increased. Therefore, the color reproduction of the display device 1 can be improved.

[0214] In some embodiments, the light conversion efficiency of the second wavelength conversion pattern 350, which converts blue light having a peak wavelength of about 440 nm to about 480 nm into green light, may be lower than that of the first wavelength conversion pattern 340, which converts blue light having a peak wavelength of about 440 nm to about 480 nm into red light. Therefore, even if the same amount of blue light is provided to the first wavelength conversion pattern 340 and the second wavelength conversion pattern 350, the amount of third light Lc emitted from the third light-transmitting region TA3 may be less than the amount of second light Lb emitted from the second light-transmitting region TA2, and as a result, the color reproducibility of the display device 1 may be reduced.

[0215] In the case where the emitted light L1 is a mixture of blue and green light, the green light component of the emitted light L1 can be emitted together with the third light Lc (which is green light obtained from the second wavelength conversion pattern 350) into the third light-transmitting region TA3. That is, the relatively small amount of green light can be compensated by the green light component emitted from the third light-emitting element ED3, and as a result, the color reproduction of the display device 1 can be improved.

[0216] like Figure 5 and Figures 8 to 11 As shown, a second cover layer 393 may be disposed below the light-transmitting pattern 330, the first wavelength conversion pattern 340, and the second wavelength conversion pattern 350. The second cover layer 393 may cover the light-transmitting pattern 330, the first wavelength conversion pattern 340, and the second wavelength conversion pattern 350. The second cover layer 393 may contact the first cover layer 391 and may seal the light-transmitting pattern 330, the first wavelength conversion pattern 340, and the second wavelength conversion pattern 350. Therefore, damage or contamination of the light-transmitting pattern 330, the first wavelength conversion pattern 340, and the second wavelength conversion pattern 350 by moisture or air penetrating from the outside of the display device 1 can be prevented or substantially prevented. In some embodiments, the second cover layer 393 may be formed of an inorganic material. In some embodiments, the second cover layer 393 may be formed of the same material as the first cover layer 391, or may include at least one of the exemplary materials selected from those included in the first cover layer 391 described above. When both the first capping layer 391 and the second capping layer 393 are formed of inorganic materials, the portions of the first capping layer 391 and the second capping layer 393 that are in direct contact with each other can be inorganic-inorganic bonded (for example, the first capping layer 391 and the second capping layer 393 can form an inorganic-inorganic bond with each other), and thus can effectively prevent or reduce the penetration of moisture or air from the outside.

[0217] like Figure 5 and Figure 11 As shown, the anti-color mixing member 370 may be disposed below the second capping layer 393. The anti-color mixing member 370 may be disposed in the light-blocking area BA and may block light transmission. Specifically, the anti-color mixing member 370 may be disposed between the light-transmitting pattern 330 and the first wavelength conversion pattern 340, and between the first wavelength conversion pattern 340 and the second wavelength conversion pattern 350, to prevent or reduce color mixing between adjacent light-transmitting areas. In some embodiments, the anti-color mixing member 370 may be formed as a strip extending in the second direction D2.

[0218] In some embodiments, the anti-color mixing component 370 may include an organic light-blocking material and may be formed by coating the organic light-blocking material and exposing the organic light-blocking material to exposure (e.g., exposure to light).

[0219] The filler component 70 may be disposed in the gap between the color conversion substrate 30 and the display substrate 10. In some embodiments, such as Figure 5 and Figures 8 to 11 As shown, the filler member 70 may be disposed between the second capping layer 393 and the film encapsulation layer 170, and between the anti-color mixing member 370 and the film encapsulation layer 170. In some embodiments, the filler member 70 may be in direct contact with the second capping layer 393 and the anti-color mixing member 370.

[0220] Figure 16 It is according to another embodiment of this disclosure along Figure 3 or Figure 4 A cross-sectional view of the display device taken by line X1-X1'. Figure 17 It is shown Figure 16 A plan view of the arrangement of barrier walls in the color conversion substrate of the display device, and Figure 18 It is shown Figure 16 A plan view of the arrangement of the first wavelength conversion pattern, the second wavelength conversion pattern, and the light-transmitting pattern in the color conversion substrate of the display device.

[0221] refer to Figures 16 to 18 The display device 1a includes a display substrate 10, a color conversion substrate 30a, and a filler component 70. The display device 1a and... Figure 5 and Figures 8 to 11 The display device 1 is substantially the same as or similar to the display device 1, except that the color conversion substrate 30a includes a barrier wall 380 and does not provide an anti-color mixing member 370. The display device 1a will be described below, focusing mainly on the differences from the display device 1.

[0222] The barrier wall 380 may be located within the light-blocking region BA and may overlap with the non-emitting region NLA. The barrier wall 380 may be configured to surround the first emitting region LA1, the second emitting region LA2, the third emitting region LA3, the fourth emitting region LA4, the fifth emitting region LA5, and the sixth emitting region LA6. In some embodiments, the barrier wall 380 may be formed in a lattice shape in a planar view.

[0223] In cases where the light-transmitting pattern 330, the first wavelength conversion pattern 340, and the second wavelength conversion pattern 350 are formed by inkjet printing, the barrier wall 380 can be used as a guide for stably (e.g., accurately) placing the ink composition used to form the light-transmitting pattern 330, the first wavelength conversion pattern 340, and the second wavelength conversion pattern 350 at each desired location.

[0224] In some embodiments, the barrier wall 380 may be formed of an organic material, particularly a photosensitive organic material. The photosensitive organic material may be a negative photosensitive material that cures when exposed to light, but this disclosure is not limited thereto.

[0225] In some embodiments, the barrier wall 380 may further include a light-shielding material. That is, the barrier wall 380 may be located in the light-blocking area BA to block the transmission of light. Specifically, the barrier wall 380 may be disposed between the light-transmitting pattern 330 and the first wavelength conversion pattern 340, and between the first wavelength conversion pattern 340 and the second wavelength conversion pattern 350, to prevent or reduce color mixing between adjacent light-transmitting areas.

[0226] The light-transmitting pattern 330 can be set in the first light-transmitting area TA1 and the fourth light-transmitting area TA4 defined by the barrier wall 380.

[0227] The first wavelength conversion pattern 340 may be located in the second light-transmitting area TA2 and the fifth light-transmitting area TA5 defined by the barrier wall 380.

[0228] The second wavelength conversion pattern 350 may be located in the third light-transmitting zone TA3 and the sixth light-transmitting zone TA6 defined by the barrier wall 380.

[0229] In some embodiments, the barrier wall 380 may be disposed below the first capping layer 391, and the second capping layer 393 may be disposed below the barrier wall 380, the light-transmitting pattern 330, the first wavelength conversion pattern 340, and the second wavelength conversion pattern 350. In this case, the light-transmitting pattern 330, the first wavelength conversion pattern 340, and the second wavelength conversion pattern 350 may be in direct contact with the barrier wall 380.

[0230] Figure 19 It is according to another embodiment of this disclosure along Figure 3 or Figure 4 A cross-sectional view of the display device taken by line X1-X1'.

[0231] refer to Figure 19 Display device 1b and Figure 5 and Figures 8 to 11 The display device 1 is substantially the same as or similar to the display device 1, except that the display substrate 10a includes components other than the second base member 310. Figure 5 The color conversion substrate 30b includes all the components of the color conversion substrate 30, while the color conversion substrate 30b only includes the second substrate member 310. The display device 1b will be described below, focusing mainly on the differences from the display device 1.

[0232] The display substrate 10a will be described below.

[0233] The panel light-shielding component 190 can be disposed on the thin film encapsulation layer 170.

[0234] A first sealing layer 391a covering the panel light-shielding member 190 may be disposed on the thin-film encapsulation layer 170. In some embodiments, the first sealing layer 391a may contact the thin-film encapsulation layer 170 and the panel light-shielding member 190. The first sealing layer 391a and Figure 5 The first cover layer 391 of the display device 1 is substantially the same, and therefore its detailed description will be omitted.

[0235] The light-transmitting pattern 330, the first wavelength conversion pattern 340, and the second wavelength conversion pattern 350 can be disposed on the first cover layer 391a.

[0236] The light-transmitting pattern 330 may be located in the first light-emitting region LA1, the first wavelength conversion pattern 340 may be located in the second light-emitting region LA2, and the second wavelength conversion pattern 350 may be located in the third light-emitting region LA3.

[0237] In some implementations, such as Figure 15 As shown, the light-transmitting pattern 330, the first wavelength conversion pattern 340, and the second wavelength conversion pattern 350 can be formed into strips.

[0238] The second capping layer 393a can be disposed on the light-transmitting pattern 330, the first wavelength conversion pattern 340, and the second wavelength conversion pattern 350. The second capping layer 393a can cover the light-transmitting pattern 330, the first wavelength conversion pattern 340, and the second wavelength conversion pattern 350. The second capping layer 393a and... Figure 5 The second cover layer 393 of the display device 1 is substantially the same, and therefore its detailed description will be omitted.

[0239] An anti-color mixing component 370 may be disposed on the second capping layer 393a. The anti-color mixing component 370 may be located in the non-emitting area NLA and may block the transmission of light. The anti-color mixing component 370 may be disposed between the light-transmitting pattern 330 and the first wavelength conversion pattern 340, and between the first wavelength conversion pattern 340 and the second wavelength conversion pattern 350, to prevent or reduce color mixing between adjacent emitting areas.

[0240] The first color filter 231a and the color pattern 250a may be disposed on the second cover layer 393a and the anti-mixing component 370.

[0241] The first color filter 231a may be disposed on the second capping layer 393a and may be located in the first light-emitting area LA1. In some embodiments, the first color filter 231a may be a blue color filter and may include a blue colorant such as a blue dye or pigment.

[0242] Color pattern 250a may be disposed on the second capping layer 393a and may be located in the non-luminescent area NLA. Color pattern 250a may overlap with anti-color mixing member 370. (e.g., similar to...) Figure 12 The color pattern 250a can be formed into a lattice shape. In some embodiments, the color pattern 250a can be in direct contact with the anti-mixing component 370. In some embodiments, the color pattern 250a can be formed of the same material as the first color filter 231a and can be connected to the first color filter 231a. In some embodiments, the thickness of the color pattern 250a can be substantially the same as the thickness of the first color filter 231a. The color pattern 250a and... Figure 5 The color pattern 250 of the display device 1 is substantially the same, and therefore, its detailed description will be omitted.

[0243] A light-shielding member 220a may be disposed on the color pattern 250a. The light-shielding member 220a may be located in the non-light-emitting area NLA and may block the transmission of light. In some embodiments, as (e.g., similar to) Figure 13 The light-shielding component 220a can be arranged in a lattice structure in the plan view.

[0244] In some embodiments, the light-shielding member 220a may include an organic light-shielding material and may be formed by coating the organic light-shielding material and exposing the organic light-shielding material to exposure (e.g., exposure to light).

[0245] The second color filter 233a and the third color filter 235a may be disposed on the second cover layer 393a and the anti-mixing component 370.

[0246] The second color filter 233a may be disposed on the second capping layer 393a and may be located in the second light-emitting region LA2. In some embodiments, the second color filter 233a may be a red color filter and may include a red colorant such as a red dye or pigment. In some embodiments, the two ends of each of the second color filters 233a may be partially located in the non-light-emitting region NLA and may overlap with the light-shielding member 220a or the color pattern 250a.

[0247] The third color filter 235a may be disposed on the second capping layer 393a and may be located in the third light-emitting region LA3. In some embodiments, the third color filter 235a may be a green color filter and may include a green colorant such as a green dye or pigment. In some embodiments, the two ends of each of the third color filters 235a may be partially located in the non-light-emitting region NLA and may overlap with the light-shielding member 220a or the color pattern 250a.

[0248] The color conversion substrate 30b, including the second substrate member 310, can be disposed on the display substrate 10a, and the filler member 70 can be disposed between the display substrate 10a and the color conversion substrate 30b.

[0249] The color conversion substrate 30b and filler component 70 may not be provided.

[0250] The display device 1b can reduce the alignment tolerance between elements in each light-emitting area (e.g., between the light-emitting element and the wavelength conversion pattern, between the pixel defining film and the anti-color mixing member, or between the pixel defining film and the light-shielding member).

[0251] Figure 20 It is according to another embodiment of this disclosure along Figure 3 or Figure 4 A cross-sectional view of the display device taken by line X1-X1'.

[0252] refer to Figure 20 Display device 1c and Figure 19 The display device 1c is substantially the same as or similar to the display device 1b, except that the display device 1c does not include the panel light-shielding member 190 and the anti-color mixing member 370, but does include the barrier wall 380. The following description of the display device 1c will focus primarily on the differences from the display device 1b.

[0253] Barrier wall 380 can be disposed on thin-film encapsulation layer 170. Barrier wall 380 can be located in light-blocking region BA, and can be formed into a lattice shape in a planar view, such as... Figure 17 As shown.

[0254] As referenced above Figures 16 to 18 As mentioned, the barrier wall 380 may include a photosensitive material and may further include a light-blocking material.

[0255] The first capping layer 391a covering the barrier wall 380 may be disposed on the thin film encapsulation layer 170.

[0256] The light-transmitting pattern 330, the first wavelength conversion pattern 340, and the second wavelength conversion pattern 350 can be disposed on the first cover layer 391a.

[0257] The light-transmitting pattern 330, the first wavelength conversion pattern 340, and the second wavelength conversion pattern 350 can be formed by inkjet printing, and the barrier wall 380 can be used as a guide for stably (e.g., accurately) placing the ink composition for forming the light-transmitting pattern 330, the first wavelength conversion pattern 340, and the second wavelength conversion pattern 350 at each desired location.

[0258] The light-transmitting pattern 330 may be located in the first light-emitting area LA1 defined by the barrier wall 380.

[0259] The first wavelength conversion pattern 340 may be located in the second light-emitting region LA2 defined by the barrier wall 380.

[0260] The second wavelength conversion pattern 350 may be located in the third luminescent region LA3 defined by the barrier wall 380.

[0261] The second cover layer 393a may be disposed on the light-transmitting pattern 330, the first wavelength conversion pattern 340, and the second wavelength conversion pattern 350.

[0262] The first color filter 231a and the color pattern 250a can be disposed on the second cover layer 393a.

[0263] The first color filter 231a may be disposed on the second capping layer 393a and may be located in the first light-emitting area LA1. The color pattern 250a may be disposed on the second capping layer 393a and may be located in the non-light-emitting area NLA.

[0264] The light-shielding member 220a can be disposed on the color pattern 250a. The light-shielding member 220a can be located in the non-light-emitting area NLA and can block the transmission of light.

[0265] The second color filter 233a and the third color filter 235a may be disposed on the second capping layer 393a. The second color filter 233a may be disposed on the second capping layer 393a and may be located in the second light-emitting area LA2 to overlap with the first wavelength conversion pattern 340. The third color filter 235a may be disposed on the second capping layer 393a and may be located in the third light-emitting area LA3 to overlap with the second wavelength conversion pattern 350.

[0266] The color conversion substrate 30b, including the second substrate member 310, can be disposed on the display substrate 10b, and the filler member 70 can be disposed between the display substrate 10b and the color conversion substrate 30b.

[0267] The color conversion substrate 30b and filler component 70 may not be provided.

[0268] According to the above embodiments, color distortion caused by the reflection of external light can be reduced, and the display quality of the display device can be improved.

[0269] Furthermore, any difference in the amount of light between different colors caused by differences in light conversion efficiency between wavelength conversion patterns can be compensated for by the light emitted from the OLED. Therefore, any difference in the amount of emitted light between different colors can be reduced, and as a result, the color reproduction and display quality of the display device can be improved.

[0270] Furthermore, because the peak wavelength range of light emitted from each light-emitting element can be broadened, the side viewing angle of the display device can be improved.

[0271] The effects of the present invention are not limited to the foregoing, and various other effects can be expected herein.

[0272] Although preferred embodiments of the invention have been disclosed for illustrative purposes, those skilled in the art will recognize that various modifications, additions, and substitutions are possible without departing from the scope and spirit of the invention as disclosed in the appended claims and their equivalents.

Claims

1. A display device comprising: a first base member having a first light-emitting region, a second light-emitting region, and a non-light-emitting region between the first light-emitting region and the second light-emitting region; a first anode electrode on the first base member and in the first light-emitting region; a second anode electrode on the first base member and in the second light-emitting region; a plurality of light-emitting layers on the first anode electrode and the second anode electrode; a cathode electrode on the plurality of light-emitting layers; a second base member on the cathode electrode, the second base member having a first surface facing the first base member; a first color filter on the first surface of the second base member and overlapping the first light-emitting region; a second color filter on the first surface of the second base member and overlapping the second light-emitting region; a color pattern on the first surface of the second base member, the color pattern being between the first color filter and the second color filter and overlapping the non-light-emitting region; a light-shielding member on the color pattern and overlapping the non-light-emitting region; a first wavelength conversion pattern on the second color filter and including a first wavelength shifter; a light-transmitting pattern on the first color filter; and a first capping layer on the first surface of the second base member and covering the first color filter, the second color filter, the color pattern, and the light-shielding member, wherein: the plurality of light-emitting layers include a first light-emitting layer, a second light-emitting layer, and a third light-emitting layer overlapping each other, the first light-emitting layer, the second light-emitting layer, and the third light-emitting layer are configured to emit light having a peak wavelength of 440 nm to less than 610 nm, one of the first light-emitting layer, the second light-emitting layer, and the third light-emitting layer is configured to emit light having a first peak wavelength, another of the first light-emitting layer, the second light-emitting layer, and the third light-emitting layer is configured to emit light having a second peak wavelength different from the first peak wavelength, the first peak wavelength is in a range of 440 nm to 480 nm and the second peak wavelength is in a range of 510 nm to 550 nm, or the first peak wavelength is in a range of 440 nm to 460 nm and the second peak wavelength is in a range of 460 nm to 480 nm, and the first capping layer includes an inorganic material, the light-transmitting pattern, and the first wavelength conversion pattern are on the first capping layer.

2. The display device according to claim 1, wherein: the plurality of light-emitting layers further include a fourth light-emitting layer overlapping the first light-emitting layer, the second light-emitting layer, and the third light-emitting layer, the fourth light-emitting layer is configured to emit light having a peak wavelength of 440 nm to 610 nm.

3. The display device according to claim 1, wherein: ​ the first color filter and the color pattern include a blue colorant, and the second color filter includes another colorant different from the blue colorant.

4. The display device of claim 3, wherein a thickness of the first color filter is the same as a thickness of the color pattern.

5. The display device of claim 1, wherein, the light-transmissive pattern includes a base resin and a scatterer in the base resin.

6. The display device of claim 5, wherein the first capping layer is in direct contact with the light-blocking member.

7. The display device of claim 5, further comprising: a second capping layer on the first capping layer and covering the light-transmissive pattern and the first wavelength conversion pattern; and a color-mixing prevention member on the second capping layer, the color-mixing prevention member being between the light-transmissive pattern and the first wavelength conversion pattern, and including a light-blocking material.

8. The display device of claim 5, further comprising: a barrier wall between the light-transmissive pattern and the first wavelength conversion pattern; and a second capping layer on the first capping layer and covering the light-transmissive pattern, the first wavelength conversion pattern, and the barrier wall, wherein the barrier wall includes a light-blocking material.

9. The display device of claim 8, wherein the light-transmissive pattern and the first wavelength conversion pattern are in direct contact with the barrier wall.

10. The display device of claim 1, further comprising: a thin film encapsulation layer on the cathode electrode; a second capping layer on the first wavelength conversion pattern; and a filler member between the thin film encapsulation layer and the second capping layer, wherein the second capping layer is in direct contact with the filler member.

11. The display device of claim 10, further comprising: a panel light-blocking member on the thin film encapsulation layer, the panel light-blocking member being between the thin film encapsulation layer and the filler member, wherein the panel light-blocking member is located in the non-light-emitting region.

12. The display device of claim 1, further comprising: a third anode electrode on the first base member and located in a third light-emitting region, wherein the third light-emitting region is further defined on the first base member; a third color filter on the first surface of the second base member and overlapping the third light-emitting region; and a second wavelength conversion pattern on the third color filter and including a second wavelength shifter, wherein: the plurality of light-emitting layers are further on the third anode electrode, and the third color filter includes a colorant different from the first color filter and the second color filter.

13. The display device of claim 12, wherein: the color pattern is on the second base member and further between the second color filter and the third color filter, and the light-blocking member is further on a portion of the color pattern located between the second color filter and the third color filter. ​ ​ ​ ​ 14. The display device of claim 13, wherein: the first color filter and the color pattern comprise a blue colorant, one of the second color filter and the third color filter comprises a red colorant, and the other of the second color filter and the third color filter comprises a green colorant.

15. The display device of claim 12, wherein the first wavelength shifter and the second wavelength shifter comprise quantum dots.

16. A display device, comprising: a base member having a first light emitting region, a second light emitting region, and a non-light emitting region between the first light emitting region and the second light emitting region; a first anode electrode on the base member and in the first light emitting region; a second anode electrode on the base member and in the second light emitting region; a plurality of light emitting layers on the first anode electrode and the second anode electrode; a cathode electrode on the plurality of light emitting layers; a thin film encapsulation layer on the cathode electrode; a first color filter on the thin film encapsulation layer and overlapping the first light emitting region; a second color filter on the thin film encapsulation layer and overlapping the second light emitting region; a color pattern on the thin film encapsulation layer, the color pattern between the first color filter and the second color filter, and overlapping the non-light emitting region; a light blocking member on the color pattern and overlapping the non-light emitting region; a light transmission pattern between the first color filter and the thin film encapsulation layer; a wavelength conversion pattern between the second color filter and the thin film encapsulation layer and comprising a wavelength shifter; and a capping layer covering the light transmission pattern and the wavelength conversion pattern, wherein: the plurality of light emitting layers comprise a first light emitting layer, a second light emitting layer, and a third light emitting layer overlapping each other, the first light emitting layer, the second light emitting layer, and the third light emitting layer are configured to emit light having a peak wavelength of 440 nm to less than 610 nm, one of the first light emitting layer, the second light emitting layer, and the third light emitting layer is configured to emit light having a first peak wavelength, another of the first light emitting layer, the second light emitting layer, and the third light emitting layer is configured to emit light having a second peak wavelength different from the first peak wavelength, the first peak wavelength is in a range of 440 nm to 480 nm and the second peak wavelength is in a range of 510 nm to 550 nm, or the first peak wavelength is in a range of 440 nm to 460 nm and the second peak wavelength is in a range of 460 nm to 480 nm, and the first color filter and the second color filter are on the capping layer.

17. The display device of claim 16, wherein the first color filter and the color pattern comprise a same colorant.

18. The display device of claim 16, further comprising: a color-mixing prevention member on the capping layer and in the non-light emitting region, wherein: the color-mixing prevention member is between the capping layer and the color pattern and in contact with the color pattern.

19. The display device of claim 18, further comprising: a panel light shielding member between the thin film encapsulation layer and the color-mixing prevention member and in the non-light emitting region.

20. The display device of claim 16, further comprising: a barrier wall on the thin film encapsulation layer, the barrier wall being between the light transmissive pattern and the wavelength conversion pattern, wherein the capping layer further covers the barrier wall.

21. The display device of claim 20, wherein the barrier wall comprises a light shielding material.

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