Display device

Abstract

A display device is provided. The display device includes a substrate including a first pixel region in which a first sub-pixel, a second sub-pixel, and a third sub-pixel are arranged and configured to emit light of different colors, and a second pixel region in which a second sub-pixel is arranged and configured to emit light of different colors, and a bank layer in which the first sub-pixel, the second sub-pixel, and the third sub-pixel are arranged. A light emitting device includes a substrate, a plurality of light emitting elements on the substrate corresponding to a first sub-pixel, a second sub-pixel, and a third sub-pixel, respectively, a bank layer on the plurality of light emitting elements and including first, second, and third openings, the first opening corresponding to the first sub-pixel, the second opening corresponding to the second sub-pixel, and the third opening corresponding to the third sub-pixel, wherein the first opening, the second opening, and the third opening are arranged in the first direction, and a first portion of the third opening extends in the first direction and overlaps the second pixel region.

Description

[0001] Cross-references to related applications

[0002] This application claims priority and benefit to Korean Patent Application No. 10-2023-0151037, filed with the Korean Intellectual Property Office on November 3, 2023, the entire disclosure of which is incorporated herein by reference. Technical Field

[0003] One or more aspects of the implementation relate to the structure of the display device. Background Technology

[0004] The display device visually displays data. The display device may include a substrate divided into a display area and a peripheral area. The display area may have scan lines and data lines insulated from each other, and may include multiple pixels. Furthermore, a thin-film transistor corresponding to each pixel and a pixel electrode electrically connected to the thin-film transistor may be provided in the display area. Additionally, a common electrode for multiple pixels may be provided in the display area. Various lines, scan drivers, data drivers, controllers, pad portions, etc., that transmit electrical signals to the display area may be positioned in the peripheral area.

[0005] Display devices can be used for a variety of purposes. Accordingly, various designs and technologies can be used to relatively improve the quality of display devices.

[0006] The information disclosed in this background section is only intended to enhance the understanding of the background, and therefore the information discussed in this background section does not necessarily constitute prior art. Utility Model Content

[0007] One or more aspects of the embodiments include a display device having relatively improved resolution to display images of excellent quality. However, the disclosed embodiments are examples and do not limit the scope of the embodiments according to this disclosure.

[0008] Additional aspects will be set forth in part in the description which follows, and will be apparent in part from the description, or may be learned by practicing the embodiments presented in this disclosure.

[0009] According to some embodiments, the display device includes a substrate, a plurality of light-emitting elements, and a dam layer. The substrate includes a first pixel region and a second pixel region adjacent to the first pixel region, wherein a first sub-pixel, a second sub-pixel, and a third sub-pixel are arranged in the first pixel region and emit light of different colors. The plurality of light-emitting elements on the substrate correspond to the first sub-pixel, the second sub-pixel, and the third sub-pixel, respectively. The dam layer is on the plurality of light-emitting elements and includes a first opening, a second opening, and a third opening. The first opening corresponds to the first sub-pixel, the second opening corresponds to the second sub-pixel, and the third opening corresponds to the third sub-pixel. The first opening, the second opening, and the third opening are arranged in a first direction, and a first portion of the third opening extends in the first direction and overlaps with the second pixel region.

[0010] According to some implementations, a fourth sub-pixel, a fifth sub-pixel, and a sixth sub-pixel may be arranged in a second pixel region. The fourth sub-pixel, the fifth sub-pixel, and the sixth sub-pixel emit light of different colors. The dam layer may also include a fourth opening corresponding to the fourth sub-pixel, a fifth opening corresponding to the fifth sub-pixel, and a sixth opening corresponding to the sixth sub-pixel. The fourth opening, the fifth opening, and the sixth opening may be arranged in a first direction, and a first portion of the fourth opening may extend in a direction opposite to the first direction and overlap with the first pixel region.

[0011] According to some implementations, the first pixel region and the second pixel region can be arranged repeatedly.

[0012] According to some implementations, the first sub-pixel and the fourth sub-pixel can emit light of the same color, the second sub-pixel and the fifth sub-pixel can emit light of the same color, and the third sub-pixel and the sixth sub-pixel can emit light of the same color.

[0013] According to some implementations, the first opening and the fourth opening may have the same area but different shapes, and the third opening and the sixth opening may have the same area but different shapes.

[0014] According to some implementations, each of the first to sixth openings may include a first portion and a second portion extending from one side of the first portion in a second direction intersecting the first direction, and the width of the first portion in the first direction may be greater than the width of the second portion in the first direction (for example, the width of the first portion in the first direction of each of the first to sixth openings may be greater than the width of the corresponding second portion in the first direction).

[0015] According to some implementations, the area of ​​the first portion of the third opening may be larger than the area of ​​the first portion of the sixth opening, and the area of ​​the second portion of the third opening may be smaller than the area of ​​the second portion of the sixth opening.

[0016] According to some embodiments, the area of ​​the first portion of the fourth opening may be larger than the area of ​​the first portion of the first opening, and the area of ​​the second portion of the fourth opening may be smaller than the area of ​​the second portion of the first opening.

[0017] According to some embodiments, each of the first opening, the third opening, and the fifth opening may have a first portion in its upper part and a second portion in its lower part relative to the second direction, and each of the second opening, the fourth opening, and the sixth opening may have a second portion in its upper part and a first portion in its lower part.

[0018] According to some implementations, the first portion of the third opening may face the first portion of the fourth opening relative to the second direction.

[0019] According to some embodiments, at least a portion of the first portion may have a circular, quadrilateral, or polygonal planar shape other than a quadrilateral (for example, at least a portion of the first portion of each of the first to sixth openings may have a circular, quadrilateral, or polygonal planar shape other than a quadrilateral).

[0020] According to some embodiments, at least one of the first to sixth openings may further include a third portion, and the third portion may be a portion extending from at least one of the first portion and the second portion (e.g., the third portion may be a portion extending from at least one of the corresponding first portion and the corresponding second portion).

[0021] According to some embodiments, at least one of the first to third openings may have an L-shape or a T-shape.

[0022] According to some embodiments, the display device may also include a quantum dot layer or a light-transmitting layer located in each of the first to third openings.

[0023] According to one or more embodiments, a display device includes a first pixel unit and a second pixel unit. The first pixel unit includes a first sub-pixel, a second sub-pixel, and a third sub-pixel that emit light of different colors, and the second pixel unit includes a fourth sub-pixel, a fifth sub-pixel, and a sixth sub-pixel that emit light of different colors. The display device includes a plurality of light-emitting elements and a barrier layer. The plurality of light-emitting elements are arranged to correspond to the first to sixth sub-pixels, respectively. The barrier layer is on the plurality of light-emitting elements and includes a first opening, a second opening, a third opening, a fourth opening, a fifth opening, and a sixth opening. The first opening corresponds to the first sub-pixel, the second opening corresponds to the second sub-pixel, the third opening corresponds to the third sub-pixel, the fourth opening corresponds to the fourth sub-pixel, the fifth opening corresponds to the fifth sub-pixel, and the sixth opening corresponds to the sixth sub-pixel. The first to sixth openings are arranged in a first direction. A first portion of the third opening extends in the first direction. A first portion of the fourth opening extends in a direction opposite to the first direction. The first portion of the third opening faces the first portion of the fourth opening relative to a second direction that intersects the first direction.

[0024] According to some implementations, the first pixel unit and the second pixel unit can be arranged repeatedly.

[0025] According to some implementations, the first sub-pixel and the fourth sub-pixel can emit light of the same color, the second sub-pixel and the fifth sub-pixel can emit light of the same color, and the third sub-pixel and the sixth sub-pixel can emit light of the same color.

[0026] According to some implementations, the first opening and the fourth opening may have the same area but different shapes, and the third opening and the sixth opening may have the same area but different shapes.

[0027] According to some embodiments, at least one of the first to sixth openings may have an L-shape or a T-shape.

[0028] According to some implementations, the first opening and the second opening may alternate with each other, the third opening and the fourth opening may alternate with each other, and the fifth opening and the sixth opening may alternate with each other.

[0029] According to some implementations, each of the first to sixth openings may include a first portion and a second portion extending from one side of the first portion in a second direction, and the width of the first portion in the first direction may be greater than the width of the second portion in the first direction (for example, the width of the first portion in the first direction of each of the first to sixth openings may be greater than the width of the corresponding second portion in the first direction).

[0030] According to some implementations, the area of ​​the first portion of the third opening may be larger than the area of ​​the first portion of the sixth opening, and the area of ​​the first portion of the fourth opening may be smaller than the area of ​​the first portion of the first opening. Attached Figure Description

[0031] The above and other aspects, features, and characteristics of some embodiments of the present disclosure will become more apparent from the following description taken in conjunction with the accompanying drawings, in which:

[0032] Figure 1 This is a schematic plan view of a display device according to some embodiments;

[0033] Figure 2 This is an equivalent circuit diagram of a light-emitting diode and a sub-pixel circuit electrically connected to the light-emitting diode included in a display device according to some embodiments.

[0034] Figure 3 It is a schematic cross-sectional view of each sub-pixel of a display device according to some embodiments;

[0035] Figure 4 It is based on some implementation methods Figure 3 A schematic diagram of the various optical components of the functional layer;

[0036] Figure 5 This is a schematic plan view of a display device according to some embodiments;

[0037] Figure 6 This is a schematic cross-sectional view of a display device according to some embodiments;

[0038] Figure 7 This is a schematic plan view of a display device according to some embodiments;

[0039] Figure 8 These are schematic plan views of a display device according to some embodiments; and

[0040] Figure 9 This is a schematic plan view of a display device according to some embodiments. Detailed Implementation

[0041] Aspects of some embodiments illustrated in the accompanying drawings will now be described in more detail, in which similar reference numerals consistently refer to similar elements. In this respect, embodiments according to this disclosure may take different forms and should not be construed as limited to the description set forth herein. Accordingly, embodiments are described below only with reference to the drawings to explain aspects of this description. As used herein, the term “and / or” includes any and all combinations of one or more of the associated listed items. Throughout this disclosure, the expression “at least one of a, b, and c” indicates only a, only b, only c, both a and b, both a and c, both b and c, all of a, b, and c, or any combination of a, b, and c.

[0042] Because various modifications can be applied and one or more embodiments can be implemented, specific embodiments will be shown in the accompanying drawings, and will be described in more detail in the detailed description. Effects and features, as well as methods for implementing them, will be elucidated with reference to the embodiments described in more detail below with reference to the accompanying drawings. However, embodiments may take different forms and should not be construed as limited to the description set forth herein.

[0043] In the following, embodiments will be described in more detail with reference to the accompanying drawings. When describing with reference to the drawings, the same or corresponding elements will be given the same reference numerals, and redundant descriptions of these elements will be omitted.

[0044] It will be understood that although the terms “first” and “second” may be used herein to describe various elements, these elements should not be limited by these terms, and these terms are only used to distinguish one element from another.

[0045] In the following implementation, unless the context clearly indicates otherwise, the singular form includes the plural form.

[0046] It will be understood that the terms “comprise,” “include,” and “have” as used herein indicate the presence of a stated feature or element, but do not preclude the presence or addition of one or more other features or elements.

[0047] It will also be understood that when a layer, zone, or element is referred to as being "on" another layer, zone, or element, it can be directly or indirectly on that other layer, zone, or element. That is, for example, an intermediary layer, zone, or element may exist.

[0048] For ease of description, the dimensions of the elements in the accompanying drawings may be exaggerated. For example, since the dimensions and thicknesses of the elements in the drawings are arbitrarily shown for ease of explanation, the following embodiments are not limited thereto.

[0049] When a particular implementation can be carried out differently, the specific process sequence may be executed in a different order than that described. As an example, two processes described consecutively may be executed substantially simultaneously, or they may be executed in the reverse order of their description.

[0050] It will be understood that when a layer, area, or element is referred to as being “connected to” another layer, area, or element, it can be “directly connected” to the other layer, area, or element, or it can be “indirectly connected” to the other layer, area, or element with one or more intervening layers, areas, or elements in between. For example, as used herein, when a layer, area, or element is referred to as being electrically connected to another layer, area, or element, it can be directly electrically connected to the other layer, area, or element, or it can be indirectly electrically connected to the other layer, area, or element via an intervening layer, area, or element. Furthermore, in this document, the x-direction can refer to the +x direction and / or the -x direction, the y-direction can refer to the +y direction and / or the -y direction, and the z-direction can refer to the +z direction and / or the -z direction.

[0051] Figure 1 This is a schematic plan view of a display device according to some embodiments.

[0052] Reference Figure 1 According to some embodiments, the display device includes a display panel 10. The display device can be any device that includes a display panel 10. For example, the display device can be one of various devices or electronic devices such as smartphones, tablet computers, laptop computers, televisions, or billboards.

[0053] The display panel 10 includes a display area DA and a peripheral area PA located outside the display area DA (e.g., on the periphery of the display area DA or outside the coverage area of ​​the display area DA). Figure 1 The illustration shows a display area DA with a rectangular shape. However, embodiments according to this disclosure are not limited to this. The display area DA may have other shapes such as a circle, an ellipse, another polygonal shape, or a specific graphic shape.

[0054] The display area DA is the area for displaying an image, and multiple sub-pixels PX may be arranged within the display area DA. Each sub-pixel PX may include a light-emitting element such as an organic light-emitting diode (OLED). For example, each sub-pixel PX may emit red, green, or blue light. The sub-pixel PX (e.g., the light-emitting element of the sub-pixel PX) may be connected to sub-pixel circuitry including thin-film transistors (TFTs), storage capacitors, or the like. The sub-pixel circuitry may include a scan line SL configured to transmit scan signals, a data line DL intersecting the scan line SL and configured to transmit data signals, and a drive voltage line PL configured to supply drive voltage. The scan line SL may extend in the x-direction, and the data line DL and drive voltage line PL may extend in the y-direction.

[0055] Subpixel PX can emit light with a brightness corresponding to an electrical signal from a subpixel circuit electrically connected to the subpixel PX (e.g., a light-emitting element of the subpixel PX). Display area DA can display an image using the light emitted from the subpixel PX. For reference, subpixel PX can be defined as an area emitting light of any one of red, green, and blue colors, as described above.

[0056] The peripheral region PA can be an area where no sub-pixels PX are arranged, and it can be an area where no image is displayed. Power lines for driving the sub-pixels PX can be located in the peripheral region PA. In addition, a printed circuit board including a driving circuit section or a terminal section to which a driver integrated circuit (IC) is connected can be arranged in the peripheral region PA.

[0057] For reference, since the display panel 10 includes a first substrate 100, the first substrate 100 may also include a display area DA and a peripheral area PA.

[0058] Figure 2 This is an equivalent circuit diagram of a light-emitting diode (LED) and a sub-pixel circuit (PC) electrically connected to the LED, which are included in a display device according to some embodiments.

[0059] Reference Figure 2 The sub-pixel circuit PC can be electrically connected to the light-emitting diode (LED), and one LED can correspond to one sub-pixel PX.

[0060] The sub-pixel circuit PC may include a first transistor Td, a second transistor Ts, and a storage capacitor Cst.

[0061] A second transistor Ts, acting as a switching transistor, can be connected to the scan line SL and the data line DL. It is turned on in response to a switching signal Sn input from the scan line SL and configured to transmit a data signal Dm input from the data line DL to the first transistor Td. One end of a storage capacitor Cst can be electrically connected to the second transistor Ts, and the other end of the storage capacitor Cst can be electrically connected to the drive voltage line PL. The storage capacitor Cst can store a voltage corresponding to the difference between the voltage received from the second transistor Ts and the drive power voltage ELVDD provided through the drive voltage line PL.

[0062] The first transistor Td, acting as the driver transistor, can be connected to the drive voltage line PL and the storage capacitor Cst, and is configured to control the magnitude of the drive current flowing through the light-emitting diode (LED) from the drive voltage line PL in response to the value of the voltage stored in the storage capacitor Cst. The LED can emit light with a certain brightness according to the drive current. The opposite electrode of the LED can receive the electrode power voltage ELVSS.

[0063] although Figure 2 The diagram illustrates a subpixel circuit PC comprising two TFTs and a storage capacitor, but one or more embodiments are not limited thereto. According to some embodiments, the subpixel circuit PC may include seven TFTs and a storage capacitor. According to some embodiments, the subpixel circuit PC may include two or more storage capacitors. In various embodiments, the subpixel circuit PC may include additional or fewer components without departing from the spirit and scope of the embodiments according to this disclosure.

[0064] Figure 3 This is a schematic cross-sectional view of each sub-pixel of a display device 1 according to some embodiments.

[0065] Reference Figure 3 Multiple sub-pixels PX (see Figure 1 The sub-pixel PX1 may include a first sub-pixel PX2 and a third sub-pixel PX3. The first sub-pixel PX1 may be a red pixel, the second sub-pixel PX2 may be a green pixel, and the third sub-pixel PX3 may be a blue pixel. The first sub-pixel PX1, the second sub-pixel PX2, and the third sub-pixel PX3 are areas that can emit red light, green light, and blue light, respectively. The display device 1 can display an image by using light emitted from the multiple sub-pixels PX.

[0066] The display device 1 may include a sub-pixel circuit PC on a first substrate 100. The sub-pixel circuit PC may include a first sub-pixel circuit PC1, a second sub-pixel circuit PC2, and a third sub-pixel circuit PC3, and the first sub-pixel circuit PC1, the second sub-pixel circuit PC2, and the third sub-pixel circuit PC3 may be electrically connected to a first light-emitting diode LED1, a second light-emitting diode LED2, and a third light-emitting diode LED3, respectively.

[0067] The first light-emitting diode (LED1), the second light-emitting diode (LED2), and the third light-emitting diode (LED3) may each comprise an organic light-emitting diode containing organic materials. Alternatively, the first light-emitting diode (LED1), the second light-emitting diode (LED2), and the third light-emitting diode (LED3) may each comprise an inorganic light-emitting diode containing inorganic materials. The inorganic light-emitting diode may include a PN junction diode containing inorganic semiconductor materials. When a forward voltage is applied to the PN junction diode, holes and electrons are injected, and the energy generated by the recombination of holes and electrons is converted into light energy, thus emitting light of a predetermined color. The above-mentioned inorganic light-emitting diodes may have a width of several micrometers to hundreds of micrometers or several nanometers to hundreds of nanometers. Alternatively, the light-emitting diode (LED) may be a light-emitting diode comprising quantum dots. As described above, the emitting layer of the light-emitting diode (LED) may include organic materials, inorganic materials or quantum dots, both organic materials and quantum dots, or both inorganic materials and quantum dots.

[0068] The first light-emitting diode LED1, the second light-emitting diode LED2, and the third light-emitting diode LED3 can emit light of the same color. For example, the light emitted from the first light-emitting diode LED1, the second light-emitting diode LED2, and the third light-emitting diode LED3 (e.g., blue light Lb) can pass through the functional layer 600 after passing through the encapsulation layer 400 on the light-emitting diode LED.

[0069] Functional layer 600 may include an optical portion that converts the color of light emitted from a light-emitting diode (LED) (e.g., blue light Lb) or transmits light without converting its color. For example, functional layer 600 may include a first quantum dot layer 610 and a second quantum dot layer 620 that converts light emitted from the LED (e.g., blue light Lb) into another color, and a light-transmitting layer 630 that transmits light emitted from the LED without converting its color. Functional layer 600 may include a first quantum dot layer 610 corresponding to a first sub-pixel PX1 that emits red light, a second quantum dot layer 620 corresponding to a second sub-pixel PX2 that emits green light, and a light-transmitting layer 630 corresponding to a third sub-pixel PX3 that emits blue light. The first quantum dot layer 610 can convert blue light Lb into red light Lr, and the second quantum dot layer 620 can convert blue light Lb into green light Lg. The light-transmitting layer 630 allows blue light Lb to pass through without converting it.

[0070] A color filter layer 800 may be positioned on the functional layer 600. The color filter layer 800 may include a first color filter 810, a second color filter 820, and a third color filter 830 of different colors. For example, the first color filter 810 may be a red color filter, the second color filter 820 may be a green color filter, and the third color filter 830 may be a blue color filter.

[0071] The color is converted by the functional layer 600 and the transmitted light passes through the first color filter 810, the second color filter 820 and the third color filter 830, so that the color purity can be relatively improved. In addition, the color filter layer 800 can prevent or significantly reduce the reflection of external light (e.g., light incident on the display device 1 from the outside of the display device 1) and be seen by the user.

[0072] A second substrate 900 may be positioned on the color filter layer 800. The second substrate 900 may include glass or a light-transmitting organic material. For example, the second substrate 900 may include a light-transmitting organic material such as acrylic resin.

[0073] According to some embodiments, the second substrate 900 is a substrate, and after the color filter layer 800 and the functional layer 600 are formed on the second substrate 900, the functional layer 600 can be integrated to face the encapsulation layer 400.

[0074] Alternatively, after the functional layer 600 and the color filter layer 800 are sequentially formed on the encapsulation layer 400, the second substrate 900 can be formed by directly applying and curing the color filter layer 800. According to some embodiments, another optical film, such as an anti-reflective (AR) film, may be positioned on the second substrate 900.

[0075] The display device 1 having the above structure may include a television, billboard, cinema screen, monitor, tablet PC, notebook computer or the like.

[0076] Figure 4 yes Figure 3 A schematic diagram of the various optical components of functional layer 600.

[0077] Reference Figure 4 The first quantum dot layer 610 can convert incident blue light Lb into red light Lr. For example... Figure 4 As shown, the first quantum dot layer 610 may include a first photosensitive polymer 1151 and first quantum dots 1152 and first scattering particles 1153 dispersed in the first photosensitive polymer 1151.

[0078] The first quantum dot 1152 can be excited by blue light Lb to isotropically emit red light Lr with a wavelength longer than that of blue light Lb. The first photosensitive polymer 1151 may include a light-transmitting organic material. The first scattering particles 1153 scatter the blue light Lb that is not absorbed by the first quantum dot 1152, resulting in the excitation of more first quantum dots 1152, thereby improving the color conversion efficiency. For example, the first scattering particles 1153 may include titanium oxide (TiO2) or metal particles. The first quantum dot 1152 may be selected from group II-VI compounds, group III-V compounds, group IV-VI compounds, group IV elements, group IV compounds, and any combinations thereof.

[0079] The second quantum dot layer 620 can convert incident blue light Lb into green light Lg. For example... Figure 4 As shown, the second quantum dot layer 620 may include a second photosensitive polymer 1161 and second quantum dots 1162 and second scattering particles 1163 dispersed in the second photosensitive polymer 1161.

[0080] The second quantum dot 1162 can be excited by blue light Lb to isotropically emit green light Lg with a wavelength longer than that of blue light Lb. The second photosensitive polymer 1161 may include a light-transmitting organic material.

[0081] The second scattering particle 1163 scatters the blue light Lb that is not absorbed by the second quantum dot 1162, thereby exciting more of the second quantum dots 1162 and improving color conversion efficiency. For example, the second scattering particle 1163 may include TiO2 or metal particles. The second quantum dot 1162 may be selected from group II-VI compounds, group III-V compounds, group IV-VI compounds, group IV elements, group IV compounds, and any combinations thereof.

[0082] According to some implementations, the first quantum dot 1152 and the second quantum dot 1162 may be made of the same material. In this case, the size of the first quantum dot 1152 may be larger than the size of the second quantum dot 1162.

[0083] The light-transmitting layer 630 can transmit blue light Lb incident on it without converting it. For example... Figure 4 As shown, the light-transmitting layer 630 may include a third photosensitive polymer 1171 dispersed with third scattering particles 1173. For example, the third photosensitive polymer 1171 may include, for example, a light-transmitting organic material, such as silicone resin or epoxy resin, and the third photosensitive polymer 1171, the first photosensitive polymer 1151, and the second photosensitive polymer 1161 may include the same material. The third scattering particles 1173 can scatter and emit blue light Lb, and the third scattering particles 1173, the first scattering particles 1153, and the second scattering particles 1163 may include the same material.

[0084] Figure 5 This is a schematic plan view of a display device according to some embodiments. Figure 5 Can be Figure 1 A schematic enlarged plan view of area A.

[0085] Reference Figure 5 The display area DA of the display device (see Figure 1 The display area DA may include a first pixel region PA1 and a second pixel region PA2. Each of the first pixel region PA1 and the second pixel region PA2 is a region that can be arranged with multiple sub-pixels, and in the display area DA (see...). Figure 1 In the first pixel region PA1 and the second pixel region PA2 can be arranged repeatedly.

[0086] A first pixel unit PU1 may be arranged in a first pixel region PA1, and a second pixel unit PU2 may be arranged in a second pixel region PA2. The first pixel unit PU1 and the second pixel unit PU2 may be defined as sub-pixel components grouped into preset units by a plurality of sub-pixels PX arranged according to a pixel array structure. According to some embodiments, each of the first pixel unit PU1 and the second pixel unit PU2 may be a sub-pixel component that is the smallest repeating unit in a certain pixel array structure.

[0087] In the display area DA (see Figure 1 In the display area DA (see [link to display area]), multiple sub-pixels PX can form a first pixel unit PU1 and a second pixel unit PU2. For example, the first pixel unit PU1 can be a sub-pixel assembly including a first sub-pixel PX1 emitting red light, a second sub-pixel PX2 emitting green light, and a third sub-pixel PX3 emitting blue light. Similarly, the second pixel unit PU2 can be a sub-pixel assembly including a fourth sub-pixel PX4 emitting red light, a fifth sub-pixel PX5 emitting green light, and a sixth sub-pixel PX6 emitting blue light. The first pixel unit PU1 is arranged in the first pixel area PA1, and the second pixel unit PU2 is arranged in the second pixel area PA2, and the first pixel unit PU1 and the second pixel unit PU2 can be adjacent to each other. In the display area DA (see [link to display area]), ... Figure 1 In the first pixel unit PU1 and the second pixel unit PU2, the first pixel unit PU1 and the second pixel unit PU2 may be repeatedly arranged in a first direction (e.g., the x direction) and a second direction (e.g., the y direction).

[0088] According to some implementation methods, such as Figure 5 As shown, each of the first pixel unit PU1 and the second pixel unit PU2 may have a structure in which multiple sub-pixels PX are arranged in a first direction (e.g., the x-direction). For example, in the first pixel region PA1, the first sub-pixel PX1, the second sub-pixel PX2, and the third sub-pixel PX3 may be arranged in the first direction (e.g., the x-direction), and in the second pixel region PA2, the fourth sub-pixel PX4, the fifth sub-pixel PX5, and the sixth sub-pixel PX6 may be arranged in the first direction (e.g., the x-direction).

[0089] The sizes (i.e., areas) of the first sub-pixel PX1, the second sub-pixel PX2, the third sub-pixel PX3, the fourth sub-pixel PX4, the fifth sub-pixel PX5, and the sixth sub-pixel PX6 may be different. For example, the area of ​​the third sub-pixel PX3 may be smaller than the area of ​​the first sub-pixel PX1 and the second sub-pixel PX2. However, the areas of sub-pixels PX emitting the same color of light may be identical. For example, the areas of the first sub-pixel PX1 and the fourth sub-pixel PX4 emitting red light may be identical, the areas of the second sub-pixel PX2 and the fifth sub-pixel PX5 emitting green light may be identical, and the areas of the third sub-pixel PX3 and the sixth sub-pixel PX6 emitting blue light may be identical. The area of ​​each of the plurality of sub-pixels PX may be defined by an opening in the embankment 500, which will be described in more detail below.

[0090] As referenced above Figure 3 The first sub-pixel PX1 includes a first light-emitting diode (LED1), a first quantum dot layer 610, and a first color filter 810, and is therefore capable of emitting red light. The second sub-pixel PX2 includes a second light-emitting diode (LED2), a second quantum dot layer 620, and a second color filter 820, and is therefore capable of emitting green light. The third sub-pixel PX3 includes a third light-emitting diode (LED3), a light-transmitting layer 630, and a third color filter 830, and is therefore capable of emitting blue light. In other words, the first sub-pixel PX1 may include the first quantum dot layer 610, the second sub-pixel PX2 may include the second quantum dot layer 620, and the third sub-pixel PX3 may include the light-transmitting layer 630.

[0091] The dam layer 500 may include a plurality of openings corresponding to a plurality of sub-pixels PX. In this case, the first quantum dot layer 610, the second quantum dot layer 620, and the light-transmitting layer 630 may be arranged in the plurality of openings of the dam layer 500. According to some embodiments, the dam layer 500 may include a first opening OP1 corresponding to the first sub-pixel PX1, a second opening OP2 corresponding to the second sub-pixel PX2, a third opening OP3 corresponding to the third sub-pixel PX3, a fourth opening OP4 corresponding to the fourth sub-pixel PX4, a fifth opening OP5 corresponding to the fifth sub-pixel PX5, and a sixth opening OP6 corresponding to the sixth sub-pixel PX6.

[0092] The first sub-pixel PX1 and the fourth sub-pixel PX4 emit red light, and correspondingly, the first quantum dot layer 610 can be arranged in the first opening OP1 and the fourth opening OP4. The second sub-pixel PX2 and the fifth sub-pixel PX5 emit green light, and correspondingly, the second quantum dot layer 620 can be arranged in the second opening OP2 and the fifth opening OP5. The third sub-pixel PX3 and the sixth sub-pixel PX6 emit blue light, and correspondingly, the light-transmitting layer 630 can be arranged in the third opening OP3 and the sixth opening OP6.

[0093] In this case, a first quantum dot layer 610, a second quantum dot layer 620, and a light-transmitting layer 630 can be applied to multiple openings in the dike layer 500 using an inkjet printing process. The inkjet printing process is a method of forming a thin film using an inkjet printing system comprising an inkjet printing body and an inkjet head having multiple nozzles. Ink is dripped onto the substrate through the nozzles of the inkjet head, and the dripped ink can diffuse around the dripping location to form a uniform film thickness. Accordingly, when the size of each opening in the dike layer 500 is larger than the size of the inkjet area IA having sufficient margin for the ink to be ejected and diffused, the display device can have more uniform brightness.

[0094] Therefore, according to some embodiments, each of the plurality of openings of the embankment 500 arranged in the display device may include a first portion containing an inkjet region IA and a second portion extending from one side of the first portion in a second direction (e.g., the y direction).

[0095] For example, the first opening OP1 may include a first portion OP11 and a second portion OP12, the second opening OP2 may include a first portion OP21 and a second portion OP22, and the third opening OP3 may include a first portion OP31 and a second portion OP32. Similarly, the fourth opening OP4 may include a first portion OP41 and a second portion OP42, the fifth opening OP5 may include a first portion OP51 and a second portion OP52, and the sixth opening OP6 may include a first portion OP61 and a second portion OP62.

[0096] Each of the first portions OP11, OP21, OP31, OP41, OP51, and OP61 is an ink-dropping area, and the inkjet region IA can be arranged within each of the first portions OP11, OP21, OP31, OP41, OP51, and OP61. Accordingly, the area of ​​each of the first portions OP11, OP21, OP31, OP41, OP51, and OP61 can be larger than the area of ​​the inkjet region IA. For example, the inkjet region IA may require at least one of its horizontal width IW and vertical width IH to be 35 μm or greater. When both the horizontal width IW and vertical width IH are ensured to be 35 μm or greater, the process time (cycle time) for forming the first quantum dot layer 610, the second quantum dot layer 620, and the light-transmitting layer 630 can be shortened, and excellent thickness uniformity of the dripping and spreading ink can be obtained. Accordingly, when viewed in a third direction (e.g., the z-direction), the inkjet region IA may have a regular octagonal shape with a horizontal width IW and a vertical width IH of 35 μm, and each of the first portions OP11, OP21, OP31, OP41, OP51 and OP61 may have a quadrilateral shape larger than that of the inkjet region IA.

[0097] However, when achieving high-resolution images, it is necessary to reduce the size of the area DA (see [reference]). Figure 1 The dimensions of the first pixel region PA1 and the second pixel region PA2 in the inkjet area IA are defined, and the dimensions of the first opening OP1, the second opening OP2, the third opening OP3, the fourth opening OP4, the fifth opening OP5, and the sixth opening OP6 are limited to fit the first pixel region PA1 and the second pixel region PA2. Accordingly, each of the first portions OP11, OP21, OP31, OP41, OP51, and OP61 has a quadrilateral shape larger than the inkjet region IA, and the widths of the second portions OP12, OP22, OP32, OP42, OP52, and OP62 in the first direction (e.g., the x-direction) may be smaller than the widths of the first portions OP11, OP21, OP31, OP41, OP51, and OP61 in the first direction (e.g., the x-direction). For example, the second parts OP12, OP22, OP32, OP42, OP52 and OP62 may extend from one side of the first parts OP11, OP21, OP31, OP41, OP51 and OP61 in a second direction (e.g., the y direction), and may each have a rectangular shape with a horizontal width smaller than that of the first parts OP11, OP21, OP31, OP41, OP51 and OP61.

[0098] Due to the above structure, at least one of the first opening OP1, the second opening OP2, the third opening OP3, the fourth opening OP4, the fifth opening OP5, and the sixth opening OP6 may have an L-shape. For example, relative to a first direction (e.g., the x-direction), the left end of the first portion OP11 of the first opening OP1 may be arranged on the same line as the left end of the second portion OP12 of the first opening OP1, and the right end of the first portion OP11 of the first opening OP1 may be arranged to protrude beyond the right end of the second portion OP12 of the first opening OP1. Similarly, relative to a first direction (e.g., the x-direction), the right end of the first portion OP21 of the second opening OP2 may be arranged on the same line as the right end of the second portion OP22 of the second opening OP2, and the left end of the first portion OP21 of the second opening OP2 may be arranged to protrude beyond the left end of the second portion OP22 of the second opening OP2.

[0099] Furthermore, as mentioned above, the areas of the openings emitting light of the same color can be substantially the same as each other. For example, the areas of the first opening OP1 and the fourth opening OP4 can be the same as each other, the areas of the second opening OP2 and the fifth opening OP5 can be the same as each other, and the areas of the third opening OP3 and the sixth opening OP6 can be the same as each other.

[0100] However, even if the openings emit light of the same color, their shapes can be different. That is, the planar areas of the first opening OP1 and the fourth opening OP4 can be the same, but the shape of the first opening OP1 can be different from the shape of the fourth opening OP4. Similarly, the shape of the second opening OP2 can be different from the shape of the fifth opening OP5, and the shape of the third opening OP3 can be different from the shape of the sixth opening OP6.

[0101] For example, even if each of the first opening OP1 and the fourth opening OP4 has an L-shape, the area of ​​each of the first portions OP11 and OP41 may differ from the area of ​​each of the second portions OP12 and OP42. Figure 5 As shown, the area of ​​the first portion OP41 of the fourth opening OP4 can be larger than the area of ​​the first portion OP11 of the first opening OP1, and the area of ​​the second portion OP42 of the fourth opening OP4 can be smaller than the area of ​​the second portion OP12 of the first opening OP1. In this case, the area of ​​the first portion OP11 of the first opening OP1 can be referred to as the area obtained by multiplying the first horizontal width W11 by the first vertical width H11, and the area of ​​the second portion OP12 of the first opening OP1 can be referred to as the area obtained by multiplying the second horizontal width W12 by the second vertical width H12. The area of ​​the first portion OP41 of the fourth opening OP4 can be referred to as the area obtained by multiplying the third horizontal width W41 by the third vertical width H41, and the area of ​​the second portion OP42 of the fourth opening OP4 can be referred to as the area obtained by multiplying the fourth horizontal width W42 by the fourth vertical width H42. Similarly, each of the third opening OP3 and the sixth opening OP6 may have an L-shape, but the area of ​​the first part OP31 of the third opening OP3 may be larger than the area of ​​the first part OP61 of the sixth opening OP6, and the area of ​​the second part OP32 of the third opening OP3 may be smaller than the area of ​​the second part OP62 of the sixth opening OP6.

[0102] As described above, this is to form a first sub-pixel PX1, a second sub-pixel PX2, a third sub-pixel PX3, a fourth sub-pixel PX4, a fifth sub-pixel PX5, and a sixth sub-pixel PX6 in the first pixel region PA1 and the second pixel region PA2, with a reduced size to achieve high resolution. For example, when the display device is a high-resolution product of 220 ppi or higher, the width of the first pixel region PA1 in the first direction (e.g., the x-direction) may be approximately 115 μm. Since each of the first sub-pixel PX1, the second sub-pixel PX2, and the third sub-pixel PX3 includes an inkjet region IA, it may be necessary to have a region with a horizontal width of at least 35 μm in the first direction (e.g., the x-direction). Furthermore, in order to stably drip the ink required to form the first quantum dot layer 610, the second quantum dot layer 620, and the light-transmitting layer 630, a region of a certain length or greater may also be needed between the first opening OP1, the second opening OP2, and the third opening OP3. Ultimately, when the first opening OP1, the second opening OP2, and the third opening OP3, each comprising an inkjet region IA, are arranged side by side, the first pixel region PA1 may be insufficient.

[0103] Accordingly, a display device according to some embodiments may have a structure in which a first pixel region PA1 and a second pixel region PA2 arranged adjacent to each other share a sub-pixel PX. That is, a third sub-pixel PX3, which is arranged closest to the second pixel region PA2 among the sub-pixels PX arranged in the first pixel region PA1, and a fourth sub-pixel PX4, which is arranged closest to the first pixel region PA1 among the sub-pixels PX arranged in the second pixel region PA2, may be arranged to overlap with both the first pixel region PA1 and the second pixel region PA2. For example, the first portion OP31 of the third opening OP3 may extend from the first pixel region PA1 to the second pixel region PA2 in a first direction (e.g., the x-direction) and may also partially overlap with the second pixel region PA2. Similarly, the first portion OP41 of the fourth opening OP4 may extend from the second pixel region PA2 to the first pixel region PA1 in a direction opposite to the first direction (e.g., the -x-direction) and may also partially overlap with the first pixel region PA1.

[0104] For the shared design described above, the size of the first portion OP31 of the third opening OP3 can be larger than the size of the first portion OP61 of the sixth opening OP6, and the size of the first portion OP41 of the fourth opening OP4 can also be larger than the size of the first portion OP11 of the first opening OP1. However, since the areas emitting light of the same color need to be the same size, the size of the second portion OP32 of the third opening OP3 can be smaller than the size of the second portion OP62 of the sixth opening OP6, and the size of the second portion OP42 of the fourth opening OP4 can also be smaller than the size of the second portion OP12 of the first opening OP1.

[0105] Furthermore, to more effectively utilize the space of the first pixel region PA1 and the second pixel region PA2, which have finite dimensions, multiple sub-pixels PX can be arranged alternately. That is, the first opening OP1 and the second opening OP2 can alternate with each other, the third opening OP3 and the fourth opening OP4 can alternate with each other, and the fifth opening OP5 and the sixth opening OP6 can alternate with each other. For example, relative to a second direction (e.g., the y-direction), the first portions OP11, OP31, and OP51 can be arranged in the upper part of the first opening OP1, the third opening OP3, and the fifth opening OP5, and the second portions OP12, OP32, and OP52 can be arranged in the lower part of the first opening OP1, the third opening OP3, and the fifth opening OP5. Similarly, relative to a second direction (e.g., the y-direction), the second portions OP22, OP42, and OP62 can be arranged in the upper part of the second opening OP2, the fourth opening OP4, and the sixth opening OP6, and the first portions OP21, OP41, and OP61 can be arranged in the lower part of the second opening OP2, the fourth opening OP4, and the sixth opening OP6.

[0106] For example, the first opening OP1, the third opening OP3, and the fifth opening OP5 may have a shape that is mirror-symmetrical to the L-shape with respect to an axis in a first direction (e.g., the x-direction), and the second opening OP2, the fourth opening OP4, and the sixth opening OP6 may have a shape that is mirror-symmetrical to the L-shape with respect to an axis in a second direction (e.g., the y-direction). With the arrangement described above, the first portion OP31 of the third opening OP3 and the first portion OP41 of the fourth opening OP4 may have a structure that faces each other with respect to the second direction (e.g., the y-direction). In other words, the first opening OP1 and the second opening OP2 are arranged alternately as a pair in a set, the third opening OP3 and the fourth opening OP4 are arranged alternately as a pair in a set, and the fifth opening OP5 and the sixth opening OP6 are arranged alternately as a pair in a set. Accordingly, space wastage in the first pixel region PA1 and the second pixel region PA2 can be significantly reduced, and a high-resolution image can be achieved.

[0107] Figure 6This is a schematic cross-sectional view of a display device according to some embodiments. Figure 6 This illustrates the following according to some implementation methods. Figure 5 A schematic cross-sectional view of the display device taken by line I-I'.

[0108] Reference Figure 6 The display device may include a first substrate 100, a first pixel electrode 311, a second pixel electrode 312, a third pixel electrode 313, a pixel defining layer 150, an encapsulation layer 400, a second substrate 900, a dam layer 500, a light-transmitting layer 630, a first quantum dot layer 610, and a second quantum dot layer 620.

[0109] The first substrate 100 may comprise glass, metal, or polymer resin. The first substrate 100 may comprise polyethersulfone, polyacrylate, polyetherimide, polyethylene naphthalate, polyethylene terephthalate, polyphenylene sulfide, polyarylate, polyimide, polycarbonate, or cellulose acetate propionate. Various modifications may be made to the first substrate 100. For example, the first substrate 100 may have a multilayer structure comprising two layers and a barrier layer, wherein the two layers comprise the aforementioned polymer resins, and the barrier layer comprises an inorganic material (e.g., silicon oxide, silicon nitride, silicon oxynitride, or the like).

[0110] The first pixel electrode 311, the second pixel electrode 312, and the third pixel electrode 313 may be disposed above the first substrate 100. In addition to the first pixel electrode 311, the second pixel electrode 312, and the third pixel electrode 313, a first sub-pixel circuit PC1, a second sub-pixel circuit PC2, and a third sub-pixel circuit PC3 electrically connected to the first pixel electrode 311, the second pixel electrode 312, and the third pixel electrode 313 may also be disposed on the first substrate 100. That is, as... Figure 6 As shown, the first pixel electrode 311 is electrically connected to the first sub-pixel circuit PC1, the second pixel electrode 312 is electrically connected to the second sub-pixel circuit PC2, and the third pixel electrode 313 is electrically connected to the third sub-pixel circuit PC3. The first pixel electrode 311, the second pixel electrode 312, and the third pixel electrode 313 are positioned on a planarization layer 140, which will be described below, on the first substrate 100.

[0111] The first sub-pixel circuit PC1 may include a first semiconductor layer 211, a first gate electrode 213, a first source electrode 215a, and a first drain electrode 215b. The first semiconductor layer 211 may include amorphous silicon, polycrystalline silicon, organic semiconductor materials, or oxide semiconductor materials. The first gate electrode 213 may include various conductive materials and may have various stacked structures. For example, the first gate electrode 213 may include a molybdenum (Mo) layer and an aluminum (Al) layer. In this case, the first gate electrode 213 may have a Mo / Al / Mo stacked structure. Alternatively, the first gate electrode 213 may also include titanium nitride (TiN). x The first source electrode 215a and the first drain electrode 215b may comprise various conductive materials and have various stacked structures. For example, the first source electrode 215a and the first drain electrode 215b may comprise a Ti layer, an Al layer, and / or a copper (Cu) layer. In this case, the first source electrode 215a and the first drain electrode 215b may each have a Ti / Al / Ti stacked structure.

[0112] although Figure 6 The illustration shows a first sub-pixel circuit PC1 including both a first source electrode 215a and a first drain electrode 215b, but one or more embodiments are not limited thereto. For example, the source region of the first semiconductor layer 211 of the first sub-pixel circuit PC1 may be integrally formed with the drain region of the semiconductor layer of another TFT to form a single body. In such a case, the first sub-pixel circuit PC1 may not include the first source electrode 215a. Furthermore, the first source electrode 215a and / or the first drain electrode 215b may be portions of wiring.

[0113] To ensure insulation between the first semiconductor layer 211 and the first gate electrode 213, a gate insulating layer 121 may be provided between the first semiconductor layer 211 and the first gate electrode 213. The gate insulating layer 121 comprises an inorganic material such as silicon oxide, silicon nitride, and / or silicon oxide nitride. Furthermore, an interlayer insulating layer 131 may be positioned on the first gate electrode 213. The interlayer insulating layer 131 comprises an inorganic material such as silicon oxide, silicon nitride, and / or silicon oxide nitride, and the first source electrode 215a and the first drain electrode 215b may be positioned on the interlayer insulating layer 131. Chemical vapor deposition (CVD) or atomic layer deposition (ALD) can be used to form the insulating layer comprising the inorganic material as described above. This applies to the embodiments described below and their modifications.

[0114] A buffer layer 110 may be located between the first substrate 100 and the first sub-pixel circuit PC1 having the above structure. The buffer layer 110 may comprise an inorganic material such as silicon oxide, silicon nitride, and / or silicon oxide nitride. The buffer layer 110 may increase the smoothness of the upper surface of the first substrate 100, or may prevent or significantly reduce the penetration of impurities from the first substrate 100 or the like into the first semiconductor layer 211 of the first sub-pixel circuit PC1.

[0115] The second sub-pixel circuit PC2, located in the second sub-pixel PX2, may include a second semiconductor layer 221, a second gate electrode 223, a second source electrode 225a, and a second drain electrode 225b. The third sub-pixel circuit PC3, located in the third sub-pixel PX3, may include a third semiconductor layer 231, a third gate electrode 233, a third source electrode 235a, and a third drain electrode 235b. The structures of the second sub-pixel circuit PC2 and the third sub-pixel circuit PC3 are the same as or similar to the structure of the first sub-pixel circuit PC1, located in the first sub-pixel PX1, and therefore are not described herein.

[0116] The planarization layer 140 can be positioned on the first sub-pixel circuit PC1. For example, as Figure 6 As shown, when the light-emitting element including the first pixel electrode 311 is arranged on the first sub-pixel circuit PC1, the planarization layer 140 covering the first sub-pixel circuit PC1 has a substantially flat upper surface, so that the first pixel electrode 311 of the light-emitting element can be positioned on the flat surface. The planarization layer 140 may include organic materials, such as acrylamide materials, benzocyclobutene (BCB), or hexamethyldisiloxane (HMDSO). Although Figure 6 The planarization layer 140 is shown to be a single layer, but it can be modified in various ways. For example, the planarization layer 140 may include multiple layers.

[0117] A light-emitting diode (LED) may be positioned in the first sub-pixel PX1. The LED includes a first pixel electrode 311, a counter electrode 305, and an intermediate layer 303 interposed therebetween, which includes an emission layer. Figure 6 As shown, the first pixel electrode 311 can contact either the first source electrode 215a or the first drain electrode 215b through a contact hole formed in the planarization layer 140 or the like, and can be electrically connected to the first sub-pixel circuit PC1. The first pixel electrode 311 may include a light-transmitting conductive layer and a reflective layer, wherein the light-transmitting conductive layer includes a light-transmitting conductive oxide such as indium tin oxide (ITO), indium oxide (In2O3), or indium zinc oxide (IZO), and the reflective layer includes a metal such as Al or silver (Ag). For example, the first pixel electrode 311 may have a three-layer structure of ITO / Ag / ITO.

[0118] A light-emitting diode (LED) may also be positioned in the second sub-pixel PX2. The LED includes a second pixel electrode 312, a counter electrode 305, and an intermediate layer 303 interposed therebetween, including an emission layer. Furthermore, an LED may be positioned in the third sub-pixel PX3. The LED includes a third pixel electrode 313, a counter electrode 305, and an intermediate layer 303 interposed therebetween, including an emission layer. The second pixel electrode 312 can contact either the second source electrode 225a or the second drain electrode 225b through a contact hole formed in the planarization layer 140 or the like, and can be electrically connected to the second sub-pixel circuit PC2. The third pixel electrode 313 can contact either the third source electrode 235a or the third drain electrode 235b through a contact hole formed in the planarization layer 140 or the like, and can be electrically connected to the third sub-pixel circuit PC3. The foregoing description of the first pixel electrode 311 applies to the second pixel electrode 312 and the third pixel electrode 313.

[0119] As described above, the intermediate layer 303, including the emission layer, can be positioned not only on the first pixel electrode 311 of the first sub-pixel PX1, but also on the second pixel electrode 312 of the second sub-pixel PX2 and the third pixel electrode 313 of the third sub-pixel PX3. The intermediate layer 303 may have a shape integrally formed as a single body across the first pixel electrode 311, the second pixel electrode 312, and the third pixel electrode 313. As needed, the intermediate layer 303 may be patterned and positioned on the first pixel electrode 311, the second pixel electrode 312, and the third pixel electrode 313. In addition to the emission layer, the intermediate layer 303 may also include a hole injection layer, a hole transport layer, and / or an electron transport layer. The layers included in the intermediate layer 303 may also have a shape integrally formed as a single body across the first pixel electrode 311, the second pixel electrode 312, and the third pixel electrode 313. As needed, some layers included in the intermediate layer 303 may also be patterned and positioned on the first pixel electrode 311, the second pixel electrode 312, and the third pixel electrode 313. The emitting layer included in the intermediate layer 303 can emit light having wavelengths in a first wavelength band. For example, the first wavelength band can be from about 450 nm to about 495 nm.

[0120] The intermediate layer 303 may not include a single emitter layer, but may include multiple emitter layers. For example, the intermediate layer 303 may also have a structure with a first emitter layer and a second emitter layer stacked, and a charge generation layer or the like may be located between the first emitter layer and the second emitter layer. In this case, a hole transport layer or an electron transport layer may also be located between the first emitter layer and the charge generation layer, and between the second emitter layer and the charge generation layer.

[0121] The opposing electrode 305 on the intermediate layer 303 may also have a shape integrally formed as a single body across the first pixel electrode 311 to the third pixel electrode 313. The opposing electrode 305 may include a light-transmitting conductive layer such as ITO, In2O3, or IZO, and may also include a semi-transparent layer containing a metal such as Al, lithium (Li), magnesium (Mg), ytterbium (Yb), or Ag. For example, the opposing electrode 305 may include a semi-transparent layer containing MgAg, AgYb, Yb / MgAg, or Li / MgAg.

[0122] A pixel defining layer 150 may be positioned on the planarization layer 140. The pixel defining layer 150 has pixel openings corresponding to pixels. That is, the pixel defining layer 150 may cover the edges of each of the first pixel electrode 311, the second pixel electrode 312, and the third pixel electrode 313, and may have multiple openings that respectively expose the central portions of the first pixel electrode 311, the second pixel electrode 312, and the third pixel electrode 313. Figure 6 As shown, by increasing the distance between the relative electrode 305 and the edges of each of the first pixel electrode 311, the second pixel electrode 312, and the third pixel electrode 313, the pixel defining layer 150 can prevent arcing or the like from occurring on the edges of the first pixel electrode 311, the second pixel electrode 312, and the third pixel electrode 313. For example, the pixel defining layer 150 may comprise an organic material such as polyimide or HMDSO.

[0123] A light-emitting diode (LED) including a first pixel electrode 311, a second pixel electrode 312, and a third pixel electrode 313, an intermediate layer 303 including an emission layer, and a counter electrode 305 can be easily degraded by moisture or oxygen. Accordingly, in order to protect the LED from external moisture or oxygen, the display device may include an encapsulation layer 400 that encapsulates the LED.

[0124] The encapsulation layer 400 may include at least one inorganic encapsulation layer and at least one organic encapsulation layer. For example, the encapsulation layer 400 may include a first inorganic encapsulation layer 410, a second inorganic encapsulation layer 430, and an organic encapsulation layer 420 therebetween.

[0125] Each of the first inorganic encapsulation layer 410 and the second inorganic encapsulation layer 430 may include at least one inorganic insulating material, such as silicon oxide (SiO2) or silicon nitride (SiN). x ), silicon nitride oxide (SiO) x N yThe organic encapsulation layer 420 may comprise a polymeric material, such as aluminum oxide (Al₂O₃), titanium oxide (TiO₂), tantalum oxide (Ta₂O₅), hafnium oxide (HfO₂), or zinc oxide (ZnO₂), and may be formed using CVD or similar methods. The polymeric material may include silicone resins, acrylic resins (e.g., polymethyl methacrylate, polyacrylic acid, or the like), epoxy resins, polyimide, and polyethylene.

[0126] Because the first inorganic encapsulation layer 410 formed using CVD has a substantially uniform thickness, the upper surface of the first inorganic encapsulation layer 410 is not flat, such as... Figure 6 As shown in the figure. However, the upper surface of the organic encapsulation layer 420 has a substantially flat shape, and correspondingly, the second inorganic encapsulation layer 430 on the organic encapsulation layer 420 may also have a substantially flat shape.

[0127] The second substrate 900 is positioned above the first substrate 100 such that the counter electrode 305 is located between the second substrate 900 and the first substrate 100. The second substrate 900 may comprise glass, metal, or polymer resin. The second substrate 900 may comprise polyethersulfone, polyacrylate, polyetherimide, polyethylene naphthalate, polyethylene terephthalate, polyphenylene sulfide, polyarylate, polyimide, polycarbonate, or cellulose acetate propionate. Various modifications can be made to the second substrate 900. For example, the second substrate 900 may have a multilayer structure comprising two layers and a barrier layer, wherein the two layers comprise the aforementioned polymer resins, and the barrier layer comprises an inorganic material (e.g., silicon oxide, silicon nitride, silicon oxynitride, or the like).

[0128] A dam layer 500 is positioned on the lower surface of the second substrate 900 in the direction (-z direction) of the first substrate 100. The dam layer 500 has a first opening OP1 corresponding to a first sub-pixel PX1, a second opening OP2 corresponding to a second sub-pixel PX2, and a third opening OP3 corresponding to a third sub-pixel PX3. For example, the first opening OP1 of the dam layer 500 may overlap with the first pixel opening of the pixel defining layer 150 exposing the first pixel electrode 311, the second opening OP2 of the dam layer 500 may overlap with the second pixel opening of the pixel defining layer 150 exposing the second pixel electrode 312, and the third opening OP3 of the dam layer 500 may overlap with the third pixel opening of the pixel defining layer 150 exposing the third pixel electrode 313. As described above, relative to the first direction (e.g., the x direction), the width of each first portion in the opening of the dam layer 500 may be greater than the width of each second portion, and therefore, the first portion OP11 of the first opening OP1 (see...) Figure 5 The width W11 and the first part OP31 of the third opening OP3 (see) Figure 5The width W31 of the second opening OP2 can be greater than the second part OP22 of the second opening OP2 (see [link]). Figure 5 The width of ) is W22.

[0129] The dam layer 500 may comprise various materials. For example, the dam layer 500 may comprise organic materials such as acrylamide materials, BCB, or HMDSO. If desired, the dam layer 500 may comprise a photoresist material, which can be readily formed using processes such as exposure and development. During the manufacturing process, the dam layer 500 is formed over the second substrate 900, and a light-transmitting layer 630, a first quantum dot layer 610, and a second quantum dot layer 620, which will be described below, are formed in the openings of the dam layer 500. The first substrate 100 and the second substrate 900 are then bonded using bonding members or the like. Because the dam layer 500 is formed over the second substrate 900 by processes such as exposure and development, the surface area of ​​the dam layer 500 in the direction (-z direction) of the first substrate 100 is larger than the surface area of ​​the dam layer 500 in the direction (+z direction) of the second substrate 900. Accordingly, in such... Figure 6 In the cross-sectional view shown, the embankment 500 may have an inverted conical shape relative to the second substrate 900.

[0130] In the third sub-pixel PX3, light with wavelengths in the first wavelength band generated in the intermediate layer 303, including the emission layer, passes through the encapsulation layer 400 without wavelength conversion and is emitted to the outside. Accordingly, a light-transmitting layer 630, including a light-transmitting resin, can be positioned in the third opening OP3 of the dam layer 500, overlapping with the third pixel electrode 313. In some cases, with... Figure 6 Unlike the example shown, the light-transmitting layer 630 may not be present in the third opening OP3 of the embankment 500. The light-transmitting layer 630 may include a light-transmitting resin and a light-scattering material.

[0131] The scattering material included in the light-transmitting layer 630 is not particularly limited, as long as the scattering material can partially scatter transmitted light by forming an optical interface between the scattering material and the light-transmitting resin. For example, the scattering material may include metal oxide particles or organic particles. The metal oxide used for the scattering material may include TiO2, zirconium oxide (ZrO2), Al2O3, In2O3, zinc oxide (ZnO), or tin oxide (SnO2), and the organic material used for the scattering material may include acrylic resin or urethane resin. The scattering material can scatter light in various directions without substantially changing the wavelength of the incident light, regardless of the incident angle. Accordingly, the scattering material can relatively improve the side visibility of the display device.

[0132] The light-transmitting resin included in the light-transmitting layer 630 can be any material that has excellent dispersion properties and is transparent, used as a scattering material. For example, polymeric resins such as acrylic resins, imide resins, epoxy resins, BCB, or HMDSO can be used as the light-transmitting resin included in the light-transmitting layer 630. The material used to form the light-transmitting layer 630, which is a mixture of light-transmitting resin and scattering material, can be positioned in the third opening OP3 of the embankment 500, which overlaps with the third pixel electrode 313, by an inkjet printing process.

[0133] The first quantum dot layer 610 may be positioned within a first opening OP1 of the embankment layer 500. When viewed in a direction perpendicular to the first substrate 100 (z-direction), the first quantum dot layer 610 may overlap with the first pixel electrode 311. Since the first quantum dot layer 610 comprises quantum dots capable of converting the wavelength of incident light, light having a wavelength in a first wavelength band and passing through the first quantum dot layer 610 can be converted into light having a wavelength in a second wavelength band. For example, the second wavelength band may be from about 625 nm to about 780 nm. However, one or more embodiments are not limited thereto. The wavelength band to which the wavelength converted by the first quantum dot layer 610 belongs and the wavelength band to which the converted wavelength belongs may be modified differently.

[0134] The first quantum dot layer 610 may have a shape in which quantum dots are dispersed within a resin. In this disclosure, a quantum dot may refer to a crystal of a semiconductor compound and may include any material capable of emitting light with various emission wavelengths depending on the size of the crystal. For example, the diameter of the quantum dots may be from about 1 nm to about 10 nm.

[0135] Quantum dots can be synthesized through wet chemical processes, organometallic chemical vapor deposition (MOCVD), molecular beam epitaxy (MBE), or similar processes. Wet chemical processes refer to methods that grow quantum dot crystals by mixing an organic solvent with a precursor material. In wet chemical processes, the organic solvent naturally acts as a dispersant coordinating with the quantum dot crystal surface and regulating crystal growth during crystal growth. Therefore, wet chemical processes are easier than vapor deposition methods such as MOCVD or MBE. Furthermore, wet chemical processes are low-cost and allow for controlled growth of quantum dot particles.

[0136] Quantum dots may include group II-VI semiconductor compounds, group III-V semiconductor compounds, group III-VI semiconductor compounds, group I-III-VI semiconductor compounds, group IV-VI semiconductor compounds, group IV elements or compounds, or any combination thereof.

[0137] Examples of group II-VI semiconductor compounds may include binary compounds such as CdS, CdSe, CdTe, ZnS, ZnSe, ZnTe, ZnO, HgS, HgSe, HgTe, MgSe, or MgS; ternary compounds such as CdSeS, CdSeTe, CdSTe, ZnSeS, ZnSeTe, ZnSTe, HgSeS, HgSeTe, HgSTe, CdZnS, CdZnSe, CdZnTe, CdHgS, CdHgSe, CdHgTe, HgZnS, HgZnSe, HgZnTe, MgZnSe, or MgZnS; quaternary compounds such as CdZnSeS, CdZnSeTe, CdZnSTe, CdHgSeS, CdHgSeTe, CdHgSTe, HgZnSeS, HgZnSeTe, or HgZnSTe; or any combination thereof.

[0138] Group III-V semiconductor compounds may include binary compounds such as GaN, GaP, GaAs, GaSb, AlN, AlP, AlAs, AlSb, InN, InP, InAs, or InSb; ternary compounds such as GaNP, GaNAs, GaNSb, GaPAs, GaPSb, AlNP, AlNAs, AlNSb, AlPAs, AlPSb, InGaP, InNP, InAlP, InNAs, InNSb, InPAs, InPSb, or GaAlNP; quaternary compounds such as GaAlNAs, GaAlNSb, GaAlPAs, GaAlPSb, GaInNP, GaInNAs, GaInNSb, GaInPAs, GaInPSb, InAlNP, InAlNAs, InAlNSb, InAlPAs, or InAlPSb; or any combination thereof. Furthermore, Group III-V semiconductor compounds may also include Group II elements. Examples of group III-V semiconductor compounds that also include group II elements may include InZnP, InGaZnP, or InAlZnP.

[0139] Examples of group III-VI semiconductor compounds may include binary compounds such as GaS, GaSe, Ga2Se3, GaTe, InS, In2S3, InSe, In2Se3 or InTe, ternary compounds such as AgInS, AgInS2, CuInS, CuInS2, InGaS3 or InGaSe3, or any combination thereof.

[0140] Examples of group I-III-VI semiconductor compounds may include ternary compounds such as AgInS, AgInS2, CuInS, CuInS2, CuGaO2, AgGaO2 or AgAlO2, or any combination thereof.

[0141] Examples of group IV-VI semiconductor compounds may include binary compounds such as SnS, SnSe, SnTe, PbS, PbSe or PbTe, ternary compounds such as SnSeS, SnSeTe, SnSTe, PbSeS, PbSeTe, PbSTe, SnPbS, SnPbSe or SnPbTe, quaternary compounds such as SnPbSSe, SnPbSeTe or SnPbSTe, or any combination thereof.

[0142] Group IV elements or compounds may include single-element substances such as silicon (Si) or germanium (Ge), binary compounds such as SiC or SiGe, or any combination thereof.

[0143] Each element in a multi-element compound, including binary, ternary, and quaternary compounds, may exist in the particles at a uniform or non-uniform concentration.

[0144] Furthermore, quantum dots can have a single structure or a core-shell dual structure in which the concentration of each element contained in the quantum dot is uniform. For example, the material contained in the core can be different from the material contained in the shell. The shell of the quantum dot can be used as a protective layer to maintain semiconductor properties by preventing chemical denaturation of the core and / or as a charging layer to impart electrophoretic properties to the quantum dot. The shell can be single-layered or multi-layered. The interface between the core and the shell can have a concentration gradient in which the concentration of the elements present in the shell decreases towards the core.

[0145] Examples of the shell for quantum dots may include metal or non-metal oxides, semiconductor compounds, or any combination thereof. Metal or non-metal oxides may include binary compounds such as SiO2, Al2O3, TiO2, ZnO, MnO, Mn2O3, Mn3O4, CuO, FeO, Fe2O3, Fe3O4, CoO, Co3O4, or NiO; ternary compounds such as MgAl2O4, CoFe2O4, NiFe2O4, or CoMn2O4; or any combination thereof. As described above, examples of semiconductor compounds may include group II-VI semiconductor compounds, group III-V semiconductor compounds, group III-VI semiconductor compounds, group I-III-VI semiconductor compounds, group IV-VI semiconductor compounds, or any combination thereof. For example, semiconductor compounds may include CdS, CdSe, CdTe, ZnS, ZnSe, ZnTe, ZnSeS, ZnTeS, GaAs, GaP, GaSb, HgS, HgSe, HgTe, InAs, InP, InGaP, InSb, AlAs, AlP, AlSb, or any combination thereof.

[0146] Quantum dots can have a full width at half maximum (FWHM) of an emission wavelength spectrum of about 45 nm or less (specifically, about 40 nm or less, and more specifically, about 30 nm or less), and within this range, color purity or color reproducibility can be relatively improved. Furthermore, since light emitted through quantum dots is emitted in all directions, the optical field of view can be relatively improved.

[0147] Furthermore, quantum dots can be specifically spherical, pyramidal, multi-armed, or cubic, and can take the form of nanoparticles, nanotubes, nanowires, nanofibers, or nanoplatelets.

[0148] Since the band gap can be tuned by adjusting the size of the quantum dots, light in various wavelength bands can be obtained from the quantum dot emitting layer. Accordingly, by using quantum dots of different sizes, light-emitting elements that emit light with various wavelengths can be realized. For example, the size of the quantum dots can be selected to emit red, green, and / or blue light. Furthermore, the size of the quantum dots can be configured such that various colors of light are combined to emit white light.

[0149] The first quantum dot layer 610 may include a scattering material. When incident light is scattered by the scattering material included in the first quantum dot layer 610, the incident light can be effectively converted by the quantum dots within the first quantum dot layer 610. The scattering material is not particularly limited, as long as it can partially scatter transmitted light by forming an optical interface between the scattering material and the light-transmitting resin. The foregoing description of the material included in the light-transmitting layer 630 for use as a scattering material applies to the material included in the first quantum dot layer 610 for use as a scattering material. The scattering material can scatter light in various directions without substantially converting the wavelength of the incident light, regardless of the angle of incidence. Accordingly, the scattering material can relatively improve the side visibility of the display device. Furthermore, the scattering material included in the first quantum dot layer 610 can improve the light conversion efficiency by increasing the probability that incident light incident on the first quantum dot layer 610 encounters the quantum dots.

[0150] The resin included in the first quantum dot layer 610 can be any material with excellent dispersion properties and light transmittance used for scattering. For example, polymeric resins such as acrylic resins, imide resins, epoxy resins, BCB, or HMDSO can be used as materials for forming the first quantum dot layer 610. The material used to form the first quantum dot layer 610 can be positioned in the first opening OP1 of the dike layer 500 overlapping with the first pixel electrode 311 by an inkjet printing process. The first quantum dot layer 610 includes resin and scattering material.

[0151] The second quantum dot layer 620 may be positioned in the second opening OP2 of the embankment layer 500. When viewed in a direction perpendicular to the first substrate 100 (z direction), the second quantum dot layer 620 may overlap with the second pixel electrode 312.

[0152] Since the second quantum dot layer 620 includes quantum dots capable of converting the wavelength of incident light, light having a wavelength in the first wavelength band and passing through the second quantum dot layer 620 can be converted into light having a wavelength in the third wavelength band. For example, the third wavelength band may be from 495 nm to about 570 nm. However, one or more embodiments are not limited thereto. The wavelength band to which the wavelength converted by the second quantum dot layer 620 belongs and the wavelength band to which the converted wavelength belongs can be modified differently.

[0153] The second quantum dot layer 620 may have a shape in which quantum dots are dispersed within a resin. In this disclosure, a quantum dot may refer to a crystal of a semiconductor compound and may include any material capable of emitting light having various emission wavelengths depending on the size of the crystal. For example, the diameter of the quantum dots may be from about 1 nm to about 10 nm. Since the above description of the quantum dots included in the first quantum dot layer 610 is applicable to the quantum dots included in the second quantum dot layer 620, a description of the quantum dots included in the second quantum dot layer 620 is not provided.

[0154] The second quantum dot layer 620 may include a scattering material. When incident light is scattered by the scattering material included in the second quantum dot layer 620, the incident light can be effectively converted by the quantum dots within the second quantum dot layer 620. The scattering material is not particularly limited, as long as the scattering material can partially scatter transmitted light by forming an optical interface between the scattering material and the light-transmitting resin. For example, the scattering material may include metal oxide particles or organic particles. The same description above applies to metal oxide or organic materials of the scattering material. The scattering material can scatter light in various directions without substantially converting the wavelength of the incident light, regardless of the angle of incidence. Accordingly, the scattering material can relatively improve the side visibility of the display device. Furthermore, the scattering material included in the second quantum dot layer 620 can improve the light conversion efficiency by increasing the probability that incident light incident on the second quantum dot layer 620 encounters the quantum dots.

[0155] The resin included in the second quantum dot layer 620 can be any material with excellent dispersion properties and light transmittance, used as a scattering material. For example, polymeric resins such as acrylic resins, imide resins, epoxy resins, BCB, or HMDSO can be used as materials for forming the second quantum dot layer 620. The material used to form the second quantum dot layer 620 can be positioned in the second opening OP2 of the dike layer 500, which overlaps with the second pixel electrode 312, by an inkjet printing process. The second quantum dot layer 620 includes the resin and the scattering material.

[0156] The surfaces of the dam layer 500, the light-transmitting layer 630, the first quantum dot layer 610, and the second quantum dot layer 620 on the first substrate 100 in the -z direction may be covered by a protective layer 510. The protective layer 510 protects the light-transmitting layer 630, the first quantum dot layer 610, and the second quantum dot layer 620. The protective layer 510 may comprise an inorganic material, such as silicon nitride, silicon oxide, or silicon nitride oxide.

[0157] A color filter layer may be located between the light-transmitting layer 630, the first quantum dot layer 610, the second quantum dot layer 620, and the second substrate 900. The first color filter 810 may be positioned above the first quantum dot layer 610, the second color filter 820 may be positioned above the second quantum dot layer 620, and the third color filter 830 may be positioned above the light-transmitting layer 630. The first color filter 810 may be a layer that allows only light with wavelengths in the range of about 625 nm to about 780 nm to pass through. The second color filter 820 may be a layer that allows only light with wavelengths in the range of about 495 nm to about 570 nm to pass through. The third color filter 830 may be a layer that allows only light with wavelengths in the range of about 450 nm to about 495 nm to pass through.

[0158] The first color filter 810 to the third color filter 830 can relatively improve the quality of the displayed image by increasing the color purity of the light emitted to the outside. Furthermore, the first color filter 810 to the third color filter 830 reduce the ratio of external light incident on the display device being reflected by the first pixel electrode 311 to the third pixel electrode 313 and then emitted back to the outside, thus reducing external light reflection. The black matrix can be between the first color filter 810 and the third color filter 830 as needed.

[0159] Furthermore, the overlapping area of ​​two or more color filters can be used as a black matrix. This is because, theoretically, when the first color filter 810 only allows light with wavelengths in the range of approximately 625 nm to approximately 780 nm, the second color filter 820 only allows light with wavelengths in the range of approximately 495 nm to approximately 570 nm, and the third color filter 830 only allows light with wavelengths in the range of approximately 450 nm to approximately 495 nm, there is no light that can pass through all of the first, second, and third color filters 810, 820, and 830 in the overlapping area. Accordingly, since there are overlapping areas of the first, second, and third color filters 810, 820, and 830 among the first sub-pixel PX1, second sub-pixel PX2, and third sub-pixel PX3, the color filters can be reliably used as a black matrix between the first, second, and third sub-pixels PX1 and PX2.

[0160] A low-refractive-index layer 700 may be located between the first color filter 810, the second color filter 820, and the third color filter 830, the dam layer 500, the light-transmitting layer 630, the first quantum dot layer 610, and the second quantum dot layer 620. During the manufacturing process, the low-refractive-index layer 700 may cover the first color filter 810, the second color filter 820, and the third color filter 830, and the dam layer 500 may be formed on the upper surface of the low-refractive-index layer 700. For example, the low-refractive-index layer 700 may comprise an inorganic material such as silicon oxide, silicon nitride, or silicon oxide nitride, and may be formed using a CVD method.

[0161] The first substrate 100 and the second substrate 900 can be bonded to the outside of the display area using a bonding member such as a sealant. Here, a filler 520 may be filled between the laminations on the first substrate 100 and the laminations on the second substrate 900, if necessary. For example, the filler 520 may be filled between the encapsulation layer 400 and the protective layer 510. Such a filler may include acrylic resin or epoxy resin.

[0162] Figure 7 This is a schematic plan view of a display device according to some embodiments. (Refer to...) Figure 7 Apart from the features of the first opening OP1, the second opening OP2, the third opening OP3, the fourth opening OP4, the fifth opening OP5, and the sixth opening OP6, the other features are the same as... Figure 5 and Figure 6 The features described in [the text] are the same. Figure 7 In the components, the same reference numerals replace those previously used. Figure 5 and Figure 6 The accompanying figures are labeled, and the differences will be described in detail below.

[0163] Reference Figure 7 The dike layer 500 may include a first opening OP1 corresponding to a first sub-pixel PX1, a second opening OP2 corresponding to a second sub-pixel PX2, a third opening OP3 corresponding to a third sub-pixel PX3, a fourth opening OP4 corresponding to a fourth sub-pixel PX4, a fifth opening OP5 corresponding to a fifth sub-pixel PX5, and a sixth opening OP6 corresponding to a sixth sub-pixel PX6. Furthermore, each of the plurality of openings in the dike layer 500 may include an inkjet region IA (e.g., see reference 1). Figure 5 The first part and the second part extending from one side of the first part in a second direction (e.g., the y direction).

[0164] For example, the first opening OP1 may include a first portion OP11 and a second portion OP12, the second opening OP2 may include a first portion OP21 and a second portion OP22, and the third opening OP3 may include a first portion OP31 and a second portion OP32. Similarly, the fourth opening OP4 may include a first portion OP41 and a second portion OP42, the fifth opening OP5 may include a first portion OP51 and a second portion OP52, and the sixth opening OP6 may include a first portion OP61 and a second portion OP62.

[0165] As described above, each of the first portions OP11, OP21, OP31, OP41, OP51, and OP61 is an area from which ink can drip, and the inkjet area IA can be arranged within each of the first portions OP11, OP21, OP31, OP41, OP51, and OP61. Accordingly, the area of ​​each of the first portions OP11, OP21, OP31, OP41, OP51, and OP61 can be larger than the inkjet area IA (see [link to relevant documentation]). Figure 5 The area of ​​the inkjet area IA (see...). Figure 5 ) may require a horizontal width IW (see Figure 5 ) and vertical width IH (see Figure 5 At least one of them is 35 μm or larger, inkjet region IA (see Figure 5 It can have a horizontal width IW of 35μm (see) Figure 5) and vertical width IH (see Figure 5 It has the shape of a regular octagon.

[0166] According to some embodiments, each of the first portions OP11, OP21, OP31, OP41, OP51, and OP61 may have a regular octagonal shape with a portion of it greater than or equal to the inkjet region IA. When each of the first opening OP1, second opening OP2, third opening OP3, fourth opening OP4, fifth opening OP5, and sixth opening OP6 has an L-shape, the first portions OP11, OP21, OP31, OP41, OP51, and OP61 may not have a completely regular octagonal shape; instead, only the sides of the first portions OP11, OP21, OP31, OP41, OP51, and OP61 that are not connected to the second portions OP12, OP22, OP32, OP42, OP52, and OP62 may have a regular octagonal shape. In this case, the first portions OP11, OP21, OP31, OP41, OP51, and OP61 may have a heptagonal shape, such as... Figure 7 As shown in the diagram. According to some embodiments, when each of the first opening OP1, the second opening OP2, the third opening OP3, the fourth opening OP4, the fifth opening OP5, and the sixth opening OP6 has a T-shape, the first portions OP11, OP21, OP31, OP41, OP51, and OP61 may have a regular octagonal shape. However, one or more embodiments are not limited. The first portions OP11, OP21, OP31, OP41, OP51, and OP61 may have a circular, quadrilateral, or polygonal planar shape other than a quadrilateral. Since the first portions OP11, OP21, OP31, OP41, OP51, and OP61 may have various planar shapes as described above, in the display device according to some embodiments, the first sub-pixel PX1, the second sub-pixel PX2, the third sub-pixel PX3, the fourth sub-pixel PX4, the fifth sub-pixel PX5, and the sixth sub-pixel PX6 can be effectively arranged in a limited space, and a high-resolution image with excellent quality can be achieved.

[0167] Figure 8 This is a schematic plan view of a display device according to some embodiments, and Figure 9 This is a schematic plan view of a display device according to some embodiments. (Refer to...) Figure 8 and Figure 9 Apart from the features of the first opening OP1, the second opening OP2, the third opening OP3, the fourth opening OP4, the fifth opening OP5, and the sixth opening OP6, the other features are the same as... Figure 5 and Figure 6 The features described in [the text] are the same. Figure 8 and Figure 9In the components, the same reference numerals replace those previously used. Figure 5 and Figure 6 The accompanying figures are labeled, and the differences will be described in detail below.

[0168] Reference Figure 8 and Figure 9 The embankment 500 may include a first opening OP1 corresponding to the first sub-pixel PX1, a second opening OP2 corresponding to the second sub-pixel PX2, a third opening OP3 corresponding to the third sub-pixel PX3, a fourth opening OP4 corresponding to the fourth sub-pixel PX4, a fifth opening OP5 corresponding to the fifth sub-pixel PX5, and a sixth opening OP6 corresponding to the sixth sub-pixel PX6.

[0169] Each of the plurality of openings in the embankment 500 may include an inkjet area IA (e.g., see reference 1). Figure 5 The first part and the second part extending from one side of the first part in a second direction (e.g., the y direction). Each of the first parts OP11, OP21, OP31, OP41, OP51 and OP61 has a quadrilateral shape larger than the inkjet region IA, and the width of the second part in the first direction (e.g., the x direction) may be smaller than the width of the first part in the first direction (e.g., the x direction).

[0170] Due to the above structure, at least one of the first opening OP1, the second opening OP2, the third opening OP3, the fourth opening OP4, the fifth opening OP5, and the sixth opening OP6 may have an L-shape. Furthermore, according to some embodiments, at least one of the first opening OP1, the second opening OP2, the third opening OP3, the fourth opening OP4, the fifth opening OP5, and the sixth opening OP6 may have a T-shape. (Refer to...) Figure 9 Since the second part OP32 of the third opening OP3 is located at the center of the first part OP31 of the third opening OP3 or on one side of the first part OP31 of the third opening OP3, the third opening OP3 can have a T-shape. For example, the left end of the first part OP31 of the third opening OP3 can be arranged to protrude beyond the left end of the second part OP32 of the third opening OP3, and the right end of the first part OP31 of the third opening OP3 can be arranged to protrude beyond the right end of the second part OP32 of the third opening OP3.

[0171] Furthermore, according to some embodiments, each of the plurality of openings in the embankment 500 may also include a third portion. In this case, the third portion may be a portion extending from at least one of the first portion and the second portion.

[0172] First, such as Figure 8As shown, the first opening OP1 may further include a third part OP13, the second opening OP2 may further include a third part OP23, and the third opening OP3 may further include third parts OP33 and OP33'. The fourth opening OP4 may further include third parts OP43 and OP43', the fifth opening OP5 may further include a third part OP53, and the sixth opening OP6 may further include a third part OP63.

[0173] According to some implementations, each of the third parts OP13, OP23, OP33, OP43, OP53 and OP63 (or the third parts OP13, OP23, OP33, OP33', OP43, OP43', OP53 and OP63) may have a triangular shape, such as Figure 8 As shown. Figure 8 As shown, when multiple openings have an L-shape or a T-shape, the width of the second part is smaller than the width of the first part, and therefore, a surplus area without sub-pixels PX can be generated. In this case, third parts OP13, OP23, OP33, OP43, OP53, and OP63 (or third parts OP13, OP23, OP33, OP33', OP43, OP43', OP53, and OP63), each having a triangular shape, can be arranged at the corners where the ends of the first and second parts intersect. Due to the additional arrangement of third parts OP13, OP23, OP33, OP43, OP53, and OP63 (or third parts OP13, OP23, OP33, OP33', OP43, OP43', OP53, and OP63), a larger area can be ensured for the first opening OP1, the second opening OP2, the third opening OP3, the fourth opening OP4, the fifth opening OP5, and the sixth opening OP6, allowing for greater design freedom.

[0174] Next, refer to Figure 9 The second opening OP2 may further include a third portion OP23, and the fifth opening OP5 may further include a third portion OP53. According to some embodiments, each of the third portions OP23 and OP53 may have a quadrilateral shape.

[0175] like Figure 9As shown, when the third opening OP3 and the fourth opening OP4 have a T-shape, the distance between the second opening OP2 and the third opening OP3, or the distance between the fourth opening OP4 and the fifth opening OP5, increases to create a surplus area. In this case, the third portion OP23 of the second opening OP2 can be arranged on the side of the second opening OP2 facing the third opening OP3, ensuring a larger area for the second opening OP2. Similarly, the third portion OP53 of the fifth opening OP5 can be arranged on the side of the fifth opening OP5 facing the third opening OP3, ensuring a larger area for the fifth opening OP5.

[0176] In other words, such as Figure 8 and Figure 9 As shown, when the opening of the embankment 500 further includes third portions OP13, OP23, OP33, OP43, OP53, and OP63 (or third portions OP13, OP23, OP33, OP33', OP43, OP43', OP53, and OP63), a larger area can be ensured for the first sub-pixel PX1, the second sub-pixel PX2, the third sub-pixel PX3, the fourth sub-pixel PX4, the fifth sub-pixel PX5, and the sixth sub-pixel PX6, allowing for more flexible design of the multiple sub-pixels PX within the first pixel region PA1 and the second pixel region PA2. In other words, in a display device according to some embodiments, the first sub-pixel PX1, the second sub-pixel PX2, the third sub-pixel PX3, the fourth sub-pixel PX4, the fifth sub-pixel PX5, and the sixth sub-pixel PX6 can be effectively arranged by using the third portions, and correspondingly, a high-resolution image with superior quality can be achieved.

[0177] As described above, one or more embodiments have been depicted with reference to the accompanying drawings, but these embodiments should be considered in a descriptive sense only. Those skilled in the art will understand that various modifications and changes can be made to these embodiments. Therefore, the true scope of protection of this disclosure should be defined by the technical spirit of the appended claims.

[0178] As described above, the display device according to one or more embodiments can have relatively improved resolution and achieve images with relatively superior quality. However, the foregoing effects are examples and do not limit the scope of this disclosure.

[0179] It should be understood that the embodiments described herein are to be considered in a descriptive sense only and are not intended to be limiting. The description of features or aspects within each embodiment should generally be regarded as other similar features or aspects that may be used in other embodiments. Although one or more embodiments have been described with reference to figures, those skilled in the art will understand that various changes in form and detail may be made therein without departing from the spirit and scope as defined by the appended claims and their equivalents.

Claims

1. A display device, characterized in that, The display device includes: A substrate, the substrate including a first pixel region and a second pixel region adjacent to the first pixel region, wherein a first sub-pixel, a second sub-pixel and a third sub-pixel are arranged in the first pixel region and configured to emit light of different colors; Multiple light-emitting elements, each corresponding to a first sub-pixel, a second sub-pixel, and a third sub-pixel on the substrate; and A dam layer is formed on the plurality of light-emitting elements and includes a first opening, a second opening, and a third opening, wherein the first opening corresponds to a first sub-pixel, the second opening corresponds to a second sub-pixel, and the third opening corresponds to a third sub-pixel. Wherein, the first opening, the second opening, and the third opening are arranged in a first direction, and The first portion of the third opening extends in the first direction and overlaps with the second pixel region.

2. The display device according to claim 1, characterized in that, The fourth, fifth, and sixth sub-pixels are arranged in the second pixel region, and the fourth, fifth, and sixth sub-pixels are configured to emit light of different colors. The embankment also includes a fourth opening corresponding to the fourth sub-pixel, a fifth opening corresponding to the fifth sub-pixel, and a sixth opening corresponding to the sixth sub-pixel. The fourth opening, the fifth opening, and the sixth opening are arranged in the first direction, and The first portion of the fourth opening extends in a direction opposite to the first direction and overlaps with the first pixel region.

3. The display device according to claim 2, characterized in that, The first opening and the fourth opening have the same area but different shapes, and The third opening and the sixth opening have the same area but different shapes.

4. The display device according to claim 2, characterized in that, Each of the first opening, the second opening, the fifth opening, and the sixth opening includes a first portion and a second portion extending from one side of the first portion in a second direction intersecting the first direction. Each of the third and fourth openings includes the first portion and a second portion extending from one side of the first portion in the second direction, and The width of the first portion of each of the first to sixth openings in the first direction is greater than the width of the corresponding second portion in the first direction.

5. The display device according to claim 4, characterized in that, Relative to the second direction, each of the first opening, the third opening, and the fifth opening has a first portion in its upper part and a second portion in its lower part, and each of the second opening, the fourth opening, and the sixth opening has a second portion in its upper part and a first portion in its lower part.

6. The display device according to claim 4, characterized in that, Relative to the second direction, the first portion of the third opening faces the first portion of the fourth opening.

7. The display device according to claim 4, characterized in that, At least a portion of the first portion of each of the first to sixth openings has a circular, quadrilateral, or polygonal planar shape other than a quadrilateral.

8. The display device according to claim 4, characterized in that, At least one of the first to the sixth openings further includes a third portion, and The third part is a portion that extends from at least one of the corresponding first part and the corresponding second part.

9. The display device according to claim 1, characterized in that, At least one of the first to the third opening has an L-shape or a T-shape.

10. The display device according to claim 1, characterized in that, The display device further includes a quantum dot layer or a light-transmitting layer positioned in each of the first to third openings.

Images