Display device

Abstract

A display device includes a first electrode, a bank layer defining a first opening overlapping the first electrode in a plan view, an emission layer overlapping the first electrode through the first opening, a second electrode on the emission layer, an encapsulation layer on the second electrode, a first insulating layer on the encapsulation layer, wherein the first insulating layer includes a first portion overlapping the first opening and defines a trench around the first portion, a touch electrode on the first insulating layer, a second insulating layer on the touch electrode and defining a second opening overlapping the first opening, and a third insulating layer on the second insulating layer.

Description

[0001] This application claims priority to and all benefits derived therefrom of Korean Patent Application No. 10-2020-0165945, filed on December 1, 2020, the entire contents of which are incorporated herein by reference. Technical Field

[0002] One or more embodiments relate to a display device. Background Technology

[0003] With the rapid development of the display field that visually represents various electrical signal information, a variety of display devices with excellent characteristics such as being thinner, lighter, and having low power consumption have been introduced.

[0004] Display devices may include liquid crystal display devices that do not emit light and use light from a backlight unit, or light-emitting display devices that include light-emitting display elements. Light-emitting display devices may include display elements having an emitting layer. Summary of the Invention

[0005] One or more embodiments relate to a display device, and more specifically, to the structure of a light-emitting display device.

[0006] Other aspects will be set forth in part in the description which follows, and in part will be obvious from the description or may be learned by practice of the embodiments presented in this disclosure.

[0007] According to one or more embodiments, a display device includes: a first electrode; a dam layer defining a first opening overlapping the first electrode in a plan view; an emitting layer overlapping the first electrode through the first opening; a second electrode located on the emitting layer; an encapsulation layer located on the second electrode; a first insulating layer located on the encapsulation layer, wherein the first insulating layer includes a first portion overlapping the first opening and defines a main trench surrounding the first portion; a touch electrode located on the first insulating layer; a second insulating layer located on the touch electrode and defining a second opening overlapping the first opening; and a third insulating layer located on the second insulating layer.

[0008] The first refractive index of the first insulating layer may be greater than each of the second refractive index of the second insulating layer and the third refractive index of the third insulating layer.

[0009] The third refractive index of the third insulating layer can be greater than the second refractive index of the second insulating layer.

[0010] The first insulating layer may include a multilayer structure, which includes a first sub-insulating layer and a second sub-insulating layer.

[0011] The touch electrode may include a metal wire surrounding at least a portion of the first opening in the plan view, and the metal wire may be disposed on at least one of the first sub-insulating layer and the second sub-insulating layer.

[0012] The side surface of the first part may include a conical inclined surface.

[0013] The slope of the side surface of the first part can have an angle of about 40 degrees (°) to about 80 degrees.

[0014] The first insulating layer may include inorganic insulating materials.

[0015] The width of the second opening in the second insulating layer can be equal to or greater than the width of the first opening in the dike layer.

[0016] The width of the first portion of the first insulating layer may be equal to or greater than the width of the first opening.

[0017] The width of the first portion of the first insulating layer may be equal to or less than the width of the first opening.

[0018] The edge defining the second opening of the second insulating layer can be arranged on the first portion.

[0019] The edge defining the second opening of the second insulating layer can be arranged in the main trench.

[0020] The first portion of the first insulating layer may include a first sub-portion and a second sub-portion spaced apart from each other relative to the sub-grooves surrounded by the main trench.

[0021] The display device may further include a light filter layer disposed between a first insulating layer and a second insulating layer, and including a light blocking portion and a color filter.

[0022] According to one or more embodiments, a display device includes: a light-emitting diode (LED) including a first electrode, a second electrode, and a light-emitting layer located between the first electrode and the second electrode; a dam layer overlapping the first electrode of the LED in a plan view and defining a first opening, the first opening defining an emission region of the LED; a first insulating layer located on the LED and having a first refractive index, wherein the first insulating layer includes a first portion overlapping the first opening and a second portion spaced apart from the first portion, and a main trench located between the first portion and the second portion; a second insulating layer located on the first insulating layer, having a second refractive index different from the first refractive index, and defining the second opening overlapping the first opening in a plan view; and a third insulating layer located on the second insulating layer and having a third refractive index different from the second refractive index.

[0023] In a plan view, the main trench of the first insulating layer can have a closed-loop shape.

[0024] The first refractive index can be greater than the second refractive index.

[0025] The third refractive index can be greater than the second refractive index.

[0026] The side surface of the first part may include a conical inclined surface.

[0027] The first insulating layer may include inorganic insulating materials.

[0028] The display device may further include an encapsulation layer on the light-emitting diode and a touch electrode on the encapsulation layer, wherein the touch electrode may be located between a first insulating layer and a second insulating layer.

[0029] The first insulating layer may have a multilayer structure including a first sub-insulating layer and a second sub-insulating layer. The touch electrode may include a metal wire surrounding at least a portion of the first opening in the plan view, and the metal wire may be arranged on at least one of the first sub-insulating layer and the second sub-insulating layer.

[0030] The width of the second opening in the second insulating layer can be equal to or greater than the width of the first opening in the dike layer.

[0031] The width of the first portion of the first insulating layer may be equal to or greater than the width of the first opening.

[0032] The width of the first portion of the first insulating layer may be equal to or less than the width of the first opening.

[0033] The width of the second opening in the second insulating layer may be smaller than the width of the first portion of the first insulating layer, and the side surface of the first portion of the first insulating layer may be covered by the second insulating layer.

[0034] The width of the second opening of the second insulating layer may be greater than the width of the first portion of the first insulating layer, and the side surface of the first portion of the first insulating layer may be covered by the third insulating layer.

[0035] The first portion of the first insulating layer may include a first sub-portion and a second sub-portion spaced apart from each other relative to the sub-grooves surrounded by the main trench.

[0036] The side surface of the first sub-part can be covered by a third insulating layer, and the side surface of the second sub-part can be covered by a second insulating layer.

[0037] The display device may further include a light filter layer disposed between a first insulating layer and a second insulating layer and including a light-blocking portion and a color filter.

[0038] These and / or other aspects will become apparent and more readily understood from the following description of the embodiments, drawings, and claims. Attached Figure Description

[0039] The above and other aspects, features, and advantages of certain embodiments of this disclosure will become more apparent from the following description taken in conjunction with the accompanying drawings, wherein:

[0040] Figure 1 This is a plan view of the display device according to an embodiment;

[0041] Figure 2 This is an equivalent circuit diagram of a light-emitting diode corresponding to a pixel of a display device according to an embodiment and a pixel circuit electrically connected to the light-emitting diode;

[0042] Figure 3 yes Figure 1 Plan view of Area III;

[0043] Figure 4 The display device according to the embodiment and Figure 3 A portion of the corresponding floor plan;

[0044] Figure 5 It is along Figure 4 A cross-sectional view of the display device according to the embodiment, taken by line V-V';

[0045] Figure 6 It shows from Figure 5 A diagram showing the path of light emitted by the display device.

[0046] Figure 7 This is a plan view of a portion of a display device according to another embodiment;

[0047] Figure 8 It is along Figure 7 A cross-sectional view of the display device taken by line VIII-VIII';

[0048] Figure 9 It shows from Figure 8 A diagram showing the path of light emitted by the display device.

[0049] Figure 10 This is a plan view of a portion of a display device according to yet another embodiment;

[0050] Figure 11 It is along Figure 10 A cross-sectional view of the display device taken by line XI-XI';

[0051] Figure 12 This is a plan view of a portion of a display device according to yet another embodiment;

[0052] Figure 13 It is along Figure 12 A cross-sectional view of the display device taken by line XIII-XIII';

[0053] Figure 14 It shows from Figure 13 A diagram showing the path of light emitted by the display device.

[0054] Figure 15 It is a cross-sectional view of a portion of a display device according to another embodiment; and

[0055] Figure 16 yes Figure 15 Floor plan. Detailed Implementation

[0056] Reference will now be made in detail to embodiments, examples of which are shown in the accompanying drawings, wherein the same reference numerals always refer to the same elements. In this respect, present embodiments may take different forms and should not be construed as limited to the description set forth herein. Therefore, embodiments are described below only by reference to the accompanying 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 listed associated items. Throughout this disclosure, the expression “at least one of a, b, and c” means 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 variations thereof.

[0057] Because this disclosure allows for various variations and numerous embodiments, certain embodiments will be shown in the accompanying drawings and described in the written description. The effects and features of this disclosure, as well as methods of implementing them, will be illustrated with reference to the embodiments described in detail below with reference to the accompanying drawings. However, this disclosure is not limited to the following embodiments and can be embodied in various forms.

[0058] In the following description, embodiments will be referenced to the accompanying drawings, wherein the same reference numerals always refer to the same elements, and repeated descriptions thereof will be omitted.

[0059] While terms such as "first" and "second" can be used to describe various components, such components are not necessarily limited to the terms mentioned above. These terms are used to distinguish one component from another.

[0060] As used herein, the singular forms “a” and “the (said)” are also intended to include the plural forms, unless the context clearly indicates otherwise.

[0061] It should be understood that the terms “comprising” and / or “including” as used herein specify the presence of the stated features or components, but do not exclude the addition of one or more other features or components.

[0062] It should also be understood that when a layer, region, or component is referred to as being "on" another layer, region, or component, it can be directly or indirectly on that other layer, region, or component. That is, for example, an intermediary layer, region, or component may exist.

[0063] When embodiments can be implemented differently, a particular process can be performed in a sequence different from that described. For example, two consecutively described processes can be performed substantially simultaneously or in the reverse order of their description.

[0064] It should be understood that when a layer, region, or component is referred to as being "connected" to another layer, region, or component, it can be "directly connected" to the other layer, region, or component, or it can be "indirectly connected" to the other layer, region, or component using other layers, regions, or components in between. For example, it should be understood that when a layer, region, or component is referred to as being "electrically connected" to another layer, region, or component, it can be "directly electrically connected" to the other layer, region, or component, or it can be "indirectly electrically connected" to the other layer, region, or component using other layers, regions, or components in between.

[0065] In the following examples, the x-axis, y-axis, and z-axis are not limited to the three axes of a Cartesian coordinate system and can be interpreted more generally. For example, the x-axis, y-axis, and z-axis can be perpendicular to each other, or they can represent different directions that are not perpendicular to each other.

[0066] Figure 1 This is a plan view of the display device 10 according to an embodiment.

[0067] The display device 10 may include a display area DA and a peripheral area PA adjacent to the display area DA. The display device 10 includes a plurality of pixels P arranged in the display area DA. Each pixel P may be connected to a scan line SL and a data line DL. Figure 1 This can be understood as a diagram of the substrate 100 of the display device 10. As an example, it can be understood that the substrate 100 includes a display area DA and a peripheral area PA.

[0068] Scan driver 1100, data driver 1200, and main power wiring (not shown) can be arranged in the peripheral area PA. Scan driver 1100 provides scan signals to each pixel P via scan line SL, data driver 1200 provides data signals to each pixel P via data line DL, and the main power wiring provides a first power supply voltage ELVDD and a second power supply voltage ELVSS (see...). Figure 2 ).

[0069] Despite Figure 1 The diagram shows a data driver 1200 disposed on a substrate 100, but in another embodiment, the data driver 1200 may be disposed on a flexible printed circuit board (“FPCB”) electrically connected to pads on one side of the display device 10.

[0070] Figure 2This is an equivalent circuit diagram of a light-emitting diode (LED) and a pixel circuit (PC) electrically connected to the LED. Figure 2 The equivalent circuit diagram in the diagram corresponds to the pixel P of the display device 10 according to the embodiment.

[0071] refer to Figure 2 The pixel circuit PC may include a first thin-film transistor T1, a second thin-film transistor T2, and a storage capacitor Cst. Figure 1 The display device 10 can provide an image by using light emitted from a light-emitting diode (LED) corresponding to each pixel P.

[0072] The second thin-film transistor T2 can be a switching thin-film transistor, which can be connected to the scan line SL and the data line DL, and can be configured to transmit a data voltage to the first thin-film transistor T1 according to the switching voltage input from the scan line SL, which is input from the data line DL. A storage capacitor Cst can be connected to the second thin-film transistor T2 and the drive voltage line PL, and can store a voltage corresponding to the difference between the voltage transmitted from the second thin-film transistor T2 and the first power supply voltage ELVDD supplied to the drive voltage line PL.

[0073] The first thin-film transistor T1 can be a driving thin-film transistor, connected to a driving voltage line PL and a storage capacitor Cst, and configured to control the driving current flowing from the driving voltage line PL to the light-emitting diode (LED) based on the voltage stored in the storage capacitor Cst. The LED can emit light with a preset brightness according to the driving current. The second electrode (e.g., cathode) of the LED can be supplied with a second power supply voltage ELVSS.

[0074] Despite Figure 2 The pixel circuit PC shown includes two thin-film transistors and one storage capacitor, but embodiments of the invention are not limited thereto. The number of thin-film transistors and the number of storage capacitors can be varied depending on the design of the pixel circuit PC.

[0075] A light-emitting diode (LED) can include an organic light-emitting diode comprising organic materials. In another embodiment, the LED can be an inorganic light-emitting diode comprising inorganic materials. An inorganic light-emitting diode can include a PN junction diode comprising inorganic semiconductor materials. When a voltage is forward-biased and 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, emitting light of a predetermined color. Inorganic LEDs can have widths ranging from a few micrometers to hundreds of micrometers or from a few nanometers to hundreds of nanometers. In an embodiment, the LED can be a light-emitting diode comprising quantum dots. As described above, an LED can include organic materials, inorganic materials, quantum dots, organic materials and quantum dots, or inorganic materials and quantum dots. For ease of explanation, the case where the LED comprises an organic light-emitting diode is described.

[0076] Figure 3 yes Figure 1 Plan view of area III.

[0077] refer to Figure 3 The first to third emission zones EA1, EA2 and EA3 can be arranged in the display area DA of the display device 10 (see...). Figure 1 In the above-referenced image, the first to third emission regions EA1, EA2, and EA3 can emit light of different colors from each other. In an embodiment, the first to third emission regions EA1, EA2, and EA3 can emit red, green, or blue light. In an embodiment, red light can be emitted from the first emission region EA1, blue light from the second emission region EA2, and green light from the third emission region EA3. A pixel is an area that emits light. The first to third emission regions EA1, EA2, and EA3 can be compared with the above-referenced image. Figure 1 The described pixel P corresponds to a specific pixel. As an example, the first emission area EA1 can correspond to a red pixel, the second emission area EA2 can correspond to a blue pixel, and the third emission area EA3 can correspond to a green pixel.

[0078] The first to third emission regions EA1, EA2, and EA3 can each be defined by a first opening 190OP of the dam layer 190 (or dam insulation layer) of the display device 10. As an example, in a plan view, the size (or width) of the first opening 190OP of the dam layer 190 can correspond to the size (or width) of each of the first to third emission regions EA1, EA2, and EA3. In an embodiment, the first to third emission regions EA1, EA2, and EA3 can each correspond to the size (or width) of each pixel.

[0079] The display device 10 may include touch electrodes 510, which can sense touch input via a hand or a tool such as a stylus. Figure 3As shown, the touch electrode 510 may have a grid structure in a plan view. As an example, the touch electrode 510 may have a grid structure formed by first sub-lines 510A and second sub-lines 510B that intersect each other. The first sub-line 510A extends in a first direction, and the second sub-line 510B extends in a second direction that intersects the first direction. Here, the first direction may be a first diagonal direction inclined relative to the x and y directions, and the second direction may be a second diagonal direction inclined relative to the x and y directions.

[0080] The first to third emission regions EA1, EA2, and EA3 can be at least partially surrounded by lines of the touch electrode 510 (e.g., first sub-line 510A and second sub-line 510B). In an embodiment, in Figure 3 The diagram shows that some of the first to third emission regions EA1, EA2, and EA3 can be completely surrounded by the first sub-line 510A and the second sub-line 510B of the touch electrode 510. The lines of the touch electrode 510 can define a gap 510g. In this case, other emission regions in the first to third emission regions EA1, EA2, and EA3 adjacent to the gap 510g can be partially surrounded by the lines of the touch electrode 510.

[0081] A first insulating layer 410 and a second insulating layer 430 may be disposed below and above the touch electrode 510, respectively. The first insulating layer 410 may define a trench 410T surrounding the first to third emission regions EA1, EA2, and EA3. The first insulating layer 410 may include a first portion 410A and a second portion 410B. In a plan view, the first portion 410A may be disposed inside the trench 410T, and the second portion 410B may be disposed outside the trench 410T. The first portion 410A may overlap with each of the first to third emission regions EA1, EA2, and EA3. The trench 410T is a trench. The first portion 410A may be spaced apart from the second portion 410B, with the trench 410T interposed therebetween. The first portion 410A may have an isolated shape.

[0082] The second insulating layer 430 may cover at least a portion of the trench 410T. In an embodiment, in Figure 3 The diagram shows a second insulating layer 430 covering a second portion 410B and trench 410T of the first insulating layer 410, and covering a portion of the first portion 410A. The second insulating layer 430 may define a second opening 430OP that overlaps in the plan view with the first portion 410A of the first insulating layer 410 and each of the first to third emission regions EA1, EA2 and EA3.

[0083] Figure 4 The display device according to the embodiment and Figure 3 A portion of the corresponding floor plan, Figure 5 It is along Figure 4 A cross-sectional view of the display device according to the embodiment, taken by line V-V', and Figure 6 It shows from Figure 5 The diagram shows the path of light emitted by the display device.

[0084] refer to Figure 4 and Figure 5 The encapsulation layer 300 may be disposed on the dam layer 190 that defines the first opening 190OP. The first insulating layer 410, the second insulating layer 430, and the third insulating layer 450 may be disposed on the encapsulation layer 300.

[0085] The embankment 190 defines a first opening 190OP therein. The first electrode 210 of the organic light-emitting diode may be disposed below the first opening 190OP. The thin-film transistor (TFT) and the storage capacitor Cst above the substrate 100 may be disposed below the first electrode 210.

[0086] The substrate 100 may include glass or a polymer resin. The polymer resin may include polyethersulfone, polyacrylate, polyetherimide, polyethylene naphthalate, polyethylene terephthalate, polyphenylene sulfide, polyarylate, polyimide, polycarbonate, or cellulose acetate propionate. The substrate 100 comprising the polymer resin may be flexible, rollable, or bendable.

[0087] The buffer layer 110, gate insulating layer 130, interlayer insulating layer 150, and planarization layer 170 can be disposed on the substrate 100. The buffer layer 110 prevents impurities from penetrating into the semiconductor layer of the thin-film transistor (TFT), the gate insulating layer 130 insulates the semiconductor layer of the TFT from the gate electrode, the interlayer insulating layer 150 insulates the source and drain electrodes of the TFT from the gate electrode, and the planarization layer 170 covers the TFT and has a nearly flat top surface.

[0088] The first electrode 210 may be a reflective electrode comprising a metal. The first electrode 210 may include a reflective layer comprising silver (Ag), magnesium (Mg), aluminum (Al), platinum (Pt), palladium (Pd), gold (Au), nickel (Ni), neodymium (Nd), iridium (Ir), chromium (Cr), or compounds thereof. The first electrode 210 may include the reflective layer and a transparent conductive layer above and / or below the reflective layer. The reflective layer comprises the aforementioned materials.

[0089] The dam layer 190 may cover the edge of the first electrode 210. In a plan view, the first opening 190OP of the dam layer 190 may overlap with the first electrode 210. The dam layer 190 may include an organic insulating material. The organic insulating material may include, for example, acrylic resins, epoxy resins, polyimides, and polyethylene.

[0090] The emitter layer 222 can overlap with the first electrode 210 through the first opening 190OP of the dam layer 190. The emitter layer 222 may include a polymer resin or a low molecular weight organic material.

[0091] The first functional layer 221 and the second functional layer 223 may be disposed below and above the emitter layer 222, respectively. The first functional layer 221 may be disposed between the first electrode 210 and the emitter layer 222. The second functional layer 223 may be disposed between the emitter layer 222 and the second electrode 230. The first functional layer 221 may include a hole transport layer (“HTL”) and / or a hole injection layer (“HIL”). The second functional layer 223 may include an electron transport layer (“ETL”) and / or an electron injection layer (“EIL”).

[0092] The second electrode 230 may include a semi-transmissive or transmissive electrode. The second electrode 230 may include a conductive material having a low work function. As an example, the second electrode 230 may include a layer comprising silver (Ag), magnesium (Mg), aluminum (Al), platinum (Pt), palladium (Pd), gold (Au), nickel (Ni), neodymium (Nd), iridium (Ir), chromium (Cr), lithium (Li), calcium (Ca), or alloys thereof. Alternatively, the second electrode 230 may further include a layer comprising indium tin oxide (“ITO”), indium zinc oxide (“IZO”), ZnO, or In₂O₃ situated on a layer comprising the aforementioned materials.

[0093] Organic light-emitting diodes (OLEDs) can emit light of a preset color. An OLED includes a first electrode 210, an emitting layer 222, and a second electrode 230. The region emitting light, i.e., the emitting region EA (see...) Figure 4 The first opening 190OP of the dam layer 190 can be defined. As an example, the width W1 of the first opening 190OP in the x direction can correspond to the width of the emission zone EA. Figure 4 The launch area EA can be compared with the above reference. Figure 3 Each of the first to third launch zones EA1, EA2 and EA3 is described.

[0094] The encapsulation layer 300 may include at least one inorganic encapsulation layer and at least one organic encapsulation layer. As an example, the encapsulation layer 300 may include a first inorganic encapsulation layer 310, a second inorganic encapsulation layer 330, and an organic encapsulation layer 320 therebetween.

[0095] The first insulating layer 410 can be disposed on the encapsulation layer 300. For example... Figure 4 and Figure 5As shown, the first insulating layer 410 may include a first portion 410A, a trench 410T, and a second portion 410B. In the plan view, the first portion 410A overlaps with the emitter region EA, the trench 410T surrounds the first portion 410A, and the second portion 410B surrounds the trench 410T.

[0096] like Figure 4 As shown in the diagram, in a plan view, trench 410T can have a closed-loop shape surrounding the entirety of the emitter region EA, the first opening 190OP, and the first portion 410A. Trench 410T is formed by removing a portion of the first insulating layer 410 in the z-direction, which is the thickness direction. Figure 5 As shown, the trench 410T can have a through-hole shape. The depth of the trench 410T can be substantially the same as the thickness of the first insulating layer 410. In another embodiment, the trench 410T can have a blind hole shape, wherein the depth of the trench 410T in the z-direction is less than the thickness of the first insulating layer 410.

[0097] The first part 410A and the second part 410B may be spaced apart from each other, with the groove 410T between them. The distance Δd from the outer edge of the first part 410A to the inner edge of the second part 410B may correspond to the width of the groove 410T. The distance Δd may correspond to half of the difference between the width W4 of the inner edge of the second part 410B and the width W3 of the first part 410A.

[0098] refer to Figure 5 The first portion 410A shown in the diagram may include a bottom surface, a top surface, and a side surface. The bottom surface faces the substrate 100, the top surface is the opposite surface of the bottom surface, and the side surface connects the bottom surface and the top surface. The side surface of the first portion 410A may include a conical bevel. The bevel of the side surface of the first portion 410A may have a first angle θ1. Relative to the top surface of the second inorganic encapsulation layer 330, the first angle θ1 may be an acute angle, for example, from about 40 degrees (°) to about 80 degrees.

[0099] In the plan view, the first part 410A can be connected to the launch area EA (see...). Figure 4 The first opening 190OP of the first section 410A overlaps with the first opening 190OP of the embankment 190. The width W3 of the first section 410A may be greater than the width W1 of the first opening 190OP.

[0100] The first insulating layer 410 may include multiple sub-insulating layers. For example, as shown... Figure 5As shown, the first insulating layer 410 may include a first sub-insulating layer 411 and a second sub-insulating layer 412. The first insulating layer 410 may include an inorganic insulating material. The first sub-insulating layer 411 and the second sub-insulating layer 412 may include silicon oxide, silicon nitride, and / or silicon oxynitride. The first sub-insulating layer 411 and the second sub-insulating layer 412 may include inorganic insulating materials that are different from each other, or they may include the same inorganic insulating material.

[0101] The first insulating layer 410 is a touch insulating layer. A touch electrode 510 may be disposed on the first insulating layer 410. In an embodiment, the touch electrode 510 may include a wire 512 disposed on the first insulating layer 410. The wire 512 may include, as referenced above... Figure 3 The first sub-wire 510A and the second sub-wire 510B are described as having a mesh structure. A portion of the conductor 512 can be electrically connected to the auxiliary conductor 511. The auxiliary conductor 511 can correspond to a portion of the connecting wire used for electrically connecting the adjacent touch electrode 510.

[0102] Although Figure 5 The diagram shows a conductor 512 arranged on the second sub-insulation layer 412 and an auxiliary conductor 511 arranged on the first sub-insulation layer 411, but the invention is not limited to this. In another embodiment, the conductor 512 may be arranged on the first sub-insulation layer 411 and the auxiliary conductor 511 may be arranged on the second sub-insulation layer 412.

[0103] A second insulating layer 430 may be disposed on the touch electrode 510 and may protect the touch electrode 510. The second insulating layer 430 may define a second opening 430OP. In a plan view, the second opening 430OP may overlap with the emitter region EA, the first opening 190OP, and / or the first portion 410A of the first insulating layer 410. The width W2 of the second opening 430OP may be equal to or greater than the width W1 of the first opening 190OP. Figure 4 and Figure 5 The diagram shows that the width W2 of the second opening 430OP is greater than the width W1 of the first opening 190OP. The width W2 of the second opening 430OP can be equal to or less than the width W3 of the first portion 410A. Figure 4 and Figure 5The diagram shows that the width W2 of the second opening 430OP is smaller than the width W3 of the first portion 410A. The second insulating layer 430 can cover the entire second portion 410B and trench 410T of the first insulating layer 410, and a portion (e.g., the exterior) of the first portion 410A of the first insulating layer 410. The second insulating layer 430 can directly contact the side surface of the first portion 410A. When the trench 410T has a through-hole shape, the second insulating layer 430 can directly contact the top surface of the encapsulation layer 300 through the trench 410T.

[0104] The side surface defining the second opening 430OP of the second insulating layer 430 may include a conical bevel. This bevel of the side surface of the second insulating layer 430 may have a second angle θ2. The second angle θ2 may be in the range of about 30° to about 70° relative to the top surface of the second sub-insulating layer 412.

[0105] The second insulating layer 430 may include a material different from that of the first insulating layer 410. As an example, the second insulating layer 430 may include an organic insulating material. The organic insulating material of the second insulating layer 430 may include acrylic resins, epoxy resins, polyimides, and polyethylene. In embodiments, the second insulating layer 430 may include ethylhexyl acrylate, pentafluoropropyl acrylate, poly(ethylene glycol) dimethacrylate, or ethylene glycol dimethacrylate. In embodiments, the second insulating layer 430 may further include a light-curing material. A third insulating layer 450 may be disposed on the second insulating layer 430 and may have a nearly flat top surface. The third insulating layer 450 may fill at least a portion of the second opening 430OP. A portion of the third insulating layer 450 may directly contact the top surface of the first insulating layer 410 through the second opening 430OP. The material of the third insulating layer 450 may be different from the materials of the first insulating layer 410 and the second insulating layer 430. The third insulating layer 450 may include organic insulating materials such as acrylic resins, epoxy resins, polyimides, and polyethylene. In embodiments, the third insulating layer 450 may include polydiarylsiloxane, methyltrimethoxysilane, or tetramethoxysilane. In embodiments, the third insulating layer 450 may include acrylic organic materials and / or siloxane organic materials. The third insulating layer 450 may include dispersed particles for achieving a high refractive index, such as zinc oxide (ZnO) dispersed in an organic insulating material. x Metal oxides of titanium dioxide (TiO2) and zirconium oxide (ZrO2).

[0106] The refractive indices of the first insulating layer 410, the second insulating layer 430, and the third insulating layer 450 may be different from each other. The first refractive index n1 of the first insulating layer 410 may be greater than each of the second refractive index n2 of the second insulating layer 430 and the third refractive index n3 of the third insulating layer 450. The second refractive index n2 of the second insulating layer 430 may be less than the third refractive index n3 of the third insulating layer 450.

[0107] The second refractive index n2 of the second insulating layer 430 can be equal to or greater than about 1.3 and less than about 1.6 (1.3 ≤ n2 < 1.6). The third refractive index n3 of the third insulating layer 450 can be equal to or greater than about 1.6 and less than about 1.8 (1.6 ≤ n3 < 1.8). The first refractive index n1 of the first insulating layer 410 can be equal to or greater than about 1.8 and less than about 2.0 (1.8 ≤ n1 < 2.0). In an embodiment, the first refractive index n1 of the first insulating layer 410 can be from about 1.8 to about 1.9. The second refractive index n2 of the second insulating layer 430 can be about 1.5. The third refractive index n3 of the third insulating layer 450 can be from about 1.6 to about 1.7.

[0108] Due to the differences in structure and / or refractive index between the first insulating layer 410 and the second insulating layer 430, such as Figure 6 As shown, the first light L1 emitted from the emitting layer 222 travels along a first path P11 in a direction inclined with respect to the z-direction and is refracted at the side surface of the first portion 410A of the first insulating layer 410, and can travel along a second path P12 (i.e., in a direction perpendicular to the top surface of the substrate 100 (z-direction)). Therefore, the luminous efficiency, such as the forward luminous efficiency, of the display device 10 can be improved.

[0109] Similar to the structure of the first insulating layer 410, light can also be refracted at the side surface of the second insulating layer 430 that defines the second opening 430OP. For example... Figure 6 As shown, due to the difference between the second refractive index n2 of the second insulating layer 430 and the third refractive index n3 of the third insulating layer 450, the second light L2 emitted from the emitting layer 222 can be refracted at the side surface of the second insulating layer 430 and then travel in a direction perpendicular to the top surface of the substrate 100 (z direction). Therefore, the luminous efficiency, such as the forward luminous efficiency, of the display device 10 can be improved.

[0110] As a comparative example, in the case where the first insulating layer 410 does not include the trench 410T (e.g., in the case where the first insulating layer 410 covers the entire substrate 100), refer to Figure 6The first light L1 described is not refracted after passing through the first insulating layer 410 and travels along the first path P11, which is the original travel path, instead of the second path P12. Therefore, the first light L1 is unlikely to reach the eyes of the user located in front of the display device 10. In this case, to improve the forward luminous efficiency, the thickness of the second insulating layer 430 needs to be increased. With the increase in the thickness of the second insulating layer 430, the fluidity of the material of the second insulating layer 430 is reduced during the manufacture of the second insulating layer 430, and therefore, it is possible that the second insulating layer 430 is not coated in certain areas, thus increasing the thickness of the display device 10. Therefore, it is difficult to significantly improve the forward luminous efficiency. In contrast, according to the embodiment of the present invention, because the first insulating layer 410 has the above-described structure, the forward luminous efficiency can be improved while preventing an increase in the thickness of the display device 10.

[0111] Figure 7 This is a plan view of a portion of a display device according to another embodiment. Figure 8 It is along Figure 7 A cross-sectional view of the display device taken by line VIII-VIII', and Figure 9 It shows from Figure 8 The diagram shows the path of light emitted by the display device.

[0112] exist Figure 7 and Figure 8 In the display device shown, in the x-direction, the width W1' of the first opening 190OP of the dike layer 190, the width W3' of the first portion 410A of the first insulating layer 410, and the width W2' of the second opening 430OP of the second insulating layer 430 are related to the reference. Figure 4 and Figure 5 The widths of the display devices described are different. Other than the differences mentioned above, the other characteristics are the same as those described above, and therefore these differences are mainly described below.

[0113] Reference Figure 4 and Figure 5 As described in the embodiments, in Figure 7 and Figure 8 In the display device, in a plan view, the first opening 190OP of the first insulating layer 190, the first portion 410A of the first insulating layer 410, and the second opening 430OP of the second insulating layer 430 can overlap each other. The width W2' of the second opening 430OP of the second insulating layer 430 can be equal to or greater than the width W1' of the first opening 190OP. Figure 7 and Figure 8 The diagram shows that the width W2' of the second opening 430OP is greater than the width W1' of the first opening 190OP.

[0114] The width W3' of the first portion 410A of the first insulating layer 410 can be equal to or less than the width W1' of the first opening 190OP. In an embodiment, in Figure 7 and Figure 8 The diagram shows that the width W3' of the first part 410A is smaller than the width W1' of the first opening 190OP.

[0115] The width W3' of the first portion 410A can be smaller than the width W2' of the second opening 430OP. In this case, the second insulating layer 430 can cover a portion of the trench 410T. As an example, the outer portion of the trench 410T adjacent to the second portion 410B can overlap with or be covered by the second insulating layer 430. The inner portion of the trench 410T adjacent to the first portion 410A can overlap with or be covered by the third insulating layer 450. In the plan view, the inner portion of the trench 410T adjacent to the first portion 410A can overlap with the second opening 430OP of the second insulating layer 430.

[0116] A portion of the second insulating layer 430 and a portion of the third insulating layer 450 can directly contact the top surface of the encapsulation layer 300 through the trench 410T. A portion of the second insulating layer 430 can directly contact the top surface of the encapsulation layer 300 through a portion (external) of the trench 410T. A portion of the third insulating layer 450 can directly contact the top surface of the encapsulation layer 300 through a portion (internal) of the trench 410T. The side surface of the first portion 410A can directly contact the third insulating layer 450. The first to third refractive indices of the first insulating layer 410, the second insulating layer 430, and the third insulating layer 450 are the same as the first to third refractive indices described above.

[0117] like Figure 9 As shown, due to the above structure, the third light L3 emitted from the emitting layer 222 can be refracted at one side surface of the first part 410A and can travel in a direction ob1 inclined with respect to the z-direction. The inclined direction ob1 can be represented as an angle other than a right angle relative to the reference direction. Figure 8 The direction in which the top surface (xy plane) of the substrate 100 intersects is described. The third light L3 traveling along the inclined direction ob1 can improve the luminous efficiency of the display device, such as lateral luminous efficiency. As lateral luminous efficiency increases, the viewing angle of the display device widens.

[0118] The fourth light L4 emitted from the emitting layer 222 can be refracted at the other side surface of the first part 410A and can travel in the z-direction. The fourth light L4 traveling in the z-direction can improve the luminous efficiency of the display device, such as the forward luminous efficiency.

[0119] As referenced above Figure 6As described, light can also be refracted at the side surface of the second insulating layer 430 defining the second opening 430OP. The second light L2 emitted from the emitting layer 222 can be refracted at the side surface of the second insulating layer 430 defining the second opening 430OP and can travel in a direction perpendicular to the top surface of the substrate 100 (z-direction). Therefore, the luminous efficiency of the display device, such as forward luminous efficiency, can be improved.

[0120] Although Figure 7 and Figure 8 The diagram shows that the width W3' of the first portion 410A is smaller than the width W1' of the first opening 190OP, but the invention is not limited to this according to embodiments. Figure 10 and Figure 11 As shown, the width W3” of the first part 410A can be greater than the width W1 of the first opening 190OP.

[0121] Figure 10 This is a plan view of a portion of a display device according to yet another embodiment, and Figure 11 It is along Figure 10 A cross-sectional view of the display device taken by line XI-XI'.

[0122] exist Figure 10 and Figure 11 In the display device shown, the width W1” of the first opening 190OP of the embankment 190, the width W3” of the first portion 410A of the first insulating layer 410, and the width W2” of the second opening 430OP of the second insulating layer 430 are consistent with the reference. Figure 4 and Figure 5 The widths of the described display devices differ. Other than these differences, the other characteristics are the same as those described above, and therefore these differences are primarily described below.

[0123] In the plan view, the first opening 190OP of the embankment 190, the first portion 410A of the first insulating layer 410, and the second opening 430OP of the second insulating layer 430 can overlap each other. The width W2” of the second opening 430OP of the second insulating layer 430 can be equal to or greater than the width W1” of the first opening 190OP. Figure 10 and Figure 11 The diagram shows that the width W2” of the second opening 430OP is greater than the width W1” of the first opening 190OP”.

[0124] The width W3” of the first portion 410A of the first insulating layer 410 can be equal to or greater than the width W1” of the first opening 190OP. In an embodiment, in Figure 10 and Figure 11 The diagram shows that the width W3” of the first part 410A is greater than the width W1 of the first opening 190OP.

[0125] The width W3” of the first part 410A can be smaller than the width W2” of the second opening 430OP”. In this case, refer to Figure 7 and Figure 8 As described, the second insulating layer 430 may cover a portion of the trench 410T. As an example, the outer portion of the trench 410T adjacent to the second portion 410B may overlap with or be covered by the second insulating layer 430. The inner portion of the trench 410T adjacent to the first portion 410A may overlap with or be covered by the third insulating layer 450. (Refer to the above...) Figure 8 As described, a portion of the second insulating layer 430 and a portion of the third insulating layer 450 can directly contact the top surface of the encapsulation layer 300 through the trench 410T. Each of the widths W1” of the first opening 190OP, W3” of the first portion 410A, and W2” of the second opening 430OP can be smaller than the width W4 of the inner edge of the second portion 410B.

[0126] From having Figure 10 and Figure 11 The light emitted by the emitting layer 222 of the display device with the structure shown can travel along the reference above. Figure 9 The described travel path is followed, and thus the luminous efficiency of the display device, such as forward luminous efficiency and / or lateral luminous efficiency, can be improved.

[0127] Figure 12 This is a plan view of a portion of a display device according to yet another embodiment. Figure 13 It is along Figure 12 A cross-sectional view of the display device taken by line XIII-XIII', and Figure 14 It shows from Figure 13 The diagram shows the path of light emitted by the display device. Although for convenience... Figure 12 and Figure 13 The touch electrode 510 is omitted (see Figure 5 However, the structure of the touch electrode 510 in this embodiment is different from that in the reference above. Figure 5 The structures described are the same.

[0128] Figure 12 and Figure 13 The display device shown includes a first insulating layer 410 comprising a first portion 410A and a second portion 410B. The first portion 410A is disposed inside a trench 410T, and the second portion 410B is disposed outside the trench 410T. Figure 12 and Figure 13 The diagram shows that the first portion 410A includes multiple sub-portions separated by a first trench 410ta.

[0129] In an embodiment, the first portion 410A of the first insulating layer 410 may include a first sub-portion 410A1 and a second sub-portion 410A2 separated by a first trench 410ta. The first trench 410ta may be surrounded by the trench 410T and may have the following configuration in a plan view: Figure 12 The closed-loop shape shown.

[0130] The first sub-part 410A1 may be surrounded by the first groove 410ta and may have an isolated shape. The second sub-part 410A2 may be spaced apart from the first sub-part 410A1 (with the first groove 410ta interposed therebetween), and may have the following shape in a plan view: Figure 12 The closed-loop shape shown.

[0131] The second sub-part 410A2 may surround the first groove 410ta and have an isolated shape. The second sub-part 410A2 may be surrounded by the groove 410T. The second sub-part 410A2 may have, in a plan view, as shown... Figure 12 The closed-loop frame structure shown.

[0132] Although Figure 12 and Figure 13 The diagram shows a first portion 410A defining a first trench 410ta and including two sub-portions, but embodiments of the invention are not limited thereto. In another embodiment, the first portion 410A may be divided by N first trenches (N is a natural number equal to or greater than 2) and may include (N+1) sub-portions.

[0133] In the plan view, the second opening 430OP of the second insulating layer 430 may overlap with the first portion 410A. As an example, at least one sub-portion of the first portion 410A may directly contact the third insulating layer 450 through the second opening 430OP while overlapping with it. At least another sub-portion of the first portion 410A may overlap with the second insulating layer 430. Regarding this, in Figure 13 The diagram shows that the first sub-part 410A1 can directly contact the third insulating layer 450 through the second opening 430OP, and the second sub-part 410A2 can directly contact the second insulating layer 430 and the third insulating layer 450.

[0134] The two opposing side surfaces of the first sub-part 410A1 can directly contact the third insulating layer 450. One of the two opposing side surfaces of the second sub-part 410A2 can directly contact the third insulating layer 450, and the other of the two opposing side surfaces of the second sub-part 410A2 can directly contact the second insulating layer 430 while being covered by it. The side surfaces of the first sub-part 410A1 and the second sub-part 410A2 may include, as referenced... Figure 5The described inclined plane of a positive cone with a first angle θ1.

[0135] In the plan view, the first part 410A can be connected to the launch area EA (see...). Figure 4 The first opening 190OP of the first section 410A overlaps with the first opening 190OP of the second section 430OP. The width W3 of the first section 410A may be greater than the width W1 of the first opening 190OP. The width W2 of the second opening 430OP may be equal to or greater than the width W1 of the first opening 190OP. Figure 12 and Figure 13 The diagram shows that the width W2 of the second opening 430OP is greater than the width W1 of the first opening 190OP. The width W2 of the second opening 430OP can be equal to or less than the width W3 of the first portion 410A. Figure 12 and Figure 13 The diagram shows that the width W2 of the second opening 430OP is smaller than the width W3 of the first part 410A.

[0136] refer to Figure 13 and Figure 14 The third light L3 and the fourth light L4 emitted from the emitting layer 222 can each be refracted at a side surface of the first sub-part 410A1 and can travel in a direction ob1 inclined with respect to the z-direction or in the z-direction. The first light L1 emitted from the emitting layer 222 can be refracted at a side surface of the second sub-part 410A2 (i.e., the side surface covered by the second insulating layer 430) to travel in the z-direction. Therefore, the luminous efficiency of the display device, such as lateral luminous efficiency and front luminous efficiency, can be improved.

[0137] Similar to the first portion 410A, the second portion 410B of the first insulating layer 410 may include multiple sub-portions. For example... Figure 12 and Figure 13 As shown, the second portion 410B may include a third sub-portion 410B1 and a fourth sub-portion 410B2 separated by the second trench 410tb. The second trench 410tb may be arranged outside the trench 410T and may have the following characteristics in the plan view: Figure 12 The closed-loop shape shown.

[0138] The third sub-part 410B1 may be surrounded by the second groove 410tb and may have a frame shape. The third sub-part 410B1 may be spaced apart from the fourth sub-part 410B2 (with the second groove 410tb interposed therebetween), and may have the following characteristics in a plan view: Figure 12 The closed-loop shape is shown. The fourth sub-part 410B2 may surround the second trench 410tb. Trench 410T may be referred to as the main trench, and the first trench 410ta and the second trench 410tb may be referred to as sub-trenches. Figure 12As shown, the fourth sub-part 410B2 may include auxiliary grooves 410AT. In the plan view, the auxiliary grooves 410AT may be spaced apart from each other and may be circular or strip-shaped. In another embodiment, the auxiliary grooves 410AT may have various shapes, such as elliptical or polygonal.

[0139] In the plan view, a sub-part of the second portion 410B may overlap with the second insulating layer 430. As an example, a sub-part of the second portion 410B may directly contact the second insulating layer 430. Regarding this, in Figure 13 The diagram shows that the third sub-part 410B1 and the fourth sub-part 410B2 are in direct contact with the second insulating layer 430. The side surfaces of the third sub-part 410B1 and the fourth sub-part 410B2 may include beveled surfaces with a first angle and are covered by the second insulating layer 430 while in contact with it.

[0140] Although Figure 12 and Figure 13 The diagram shows a second portion 410B defining a second trench 410tb and including two sub-parts, but embodiments according to the invention are not limited thereto. In another embodiment, the second portion 410B can be divided by M second trenches (M is a natural number equal to or greater than 2), and therefore can include (M+1) sub-parts.

[0141] refer to Figure 14 The first light L1 emitted from the emitting layer 222 can be refracted at the side surface of the third sub-part 410B1 to travel in the z-direction. Therefore, the luminous efficiency of the display device, such as the forward luminous efficiency, can be improved.

[0142] The side surface defining the second opening 430OP of the second insulating layer 430 may include a conical bevel and directly contact the third insulating layer 450. For example... Figure 14 As shown, the second light L2 emitted from the emitting layer 222 can be refracted at this side surface of the second insulating layer 430 to travel in the z direction.

[0143] The width W3 of the first portion 410A of the first insulating layer 410 can be equal to or greater than the width W2 of the second opening 430OP of the second insulating layer 430. Figures 12 to 14 The diagram shows that, in the x-direction, the width W3 of the first portion 410A of the first insulating layer 410 is greater than the width W2 of the second opening 430OP of the second insulating layer 430. However, embodiments of the present invention are not limited thereto.

[0144] In another embodiment, the width of the first portion 410A of the first insulating layer 410 may be smaller than the width of the first opening 190OP of the dike layer 190 and / or the width of the second opening 430OP of the second insulating layer 430. In another embodiment, the width of the first portion 410A of the first insulating layer 410 may be greater than the width of the first opening 190OP of the dike layer 190 and smaller than the width of the second opening 430OP of the second insulating layer 430.

[0145] Figure 15 This is a cross-sectional view of a portion of a display device according to another embodiment, and Figure 16 yes Figure 15 Floor plan.

[0146] Figure 15 The display device shown may further include a filter layer 600 located between the first insulating layer 410 and the second insulating layer 430, and other characteristics besides those described above are the same as those referenced above. Figure 4 and Figure 5 The described characteristics are the same.

[0147] The light filter layer 600 may include a light blocking portion 610, a color filter, and a protective layer 630. The light blocking portion 610 defines an opening 610OP, the color filter is disposed in the opening 610OP of the light blocking portion 610, and the protective layer 630 is located on the light blocking portion 610 and the color filter.

[0148] The opening 610OP of the light-blocking portion 610 may overlap with the first opening 190'OP of the embankment 190'. The light-blocking portion 610 may include a black matrix.

[0149] The color filter can be arranged in the opening 610OP of the light-blocking portion 610. Regarding this, Figure 15 A first color filter 620a is shown arranged in the opening 610OP. The first color filter 620a can overlap with a second color filter 620b of a different color located on the light-blocking portion 610. Although Figure 15 Two color filters are shown, but the filter layer 600 may include three color filters with different colors (e.g., red, green, and blue). The positions of the three color filters can be determined based on the color of the light emitted from the light-emitting diode. As an example, in Figure 15 When the emitting layer 222 shown emits red light, the first color filter 620a can be a red color filter. In another embodiment, in Figure 15 When the emission layer 222 shown emits green or blue light, the first color filter 620a can be a green color filter or a blue color filter.

[0150] The protective layer 630 is a light-transmitting layer and can planarize the top surface of the light-blocking portion 610 and the top surface of the color filter. The protective layer 630 may include an organic insulating material, such as an acrylic resin.

[0151] With the above structure, the filter layer 600 can prevent the reflection of light traveling from the outside to the display device. In an embodiment, the barrier layer 190' may include a light-blocking material. The barrier layer 190' including the light-blocking material and the filter layer 600 can further improve the anti-reflection function of external light.

[0152] The first insulating layer 410 may have the above reference. Figure 5 The structure described. As an example, the first insulating layer 410 may include a first portion 410A and a second portion 410B spaced apart from each other in the trench 410T. The material and first refractive index of the first insulating layer 410 are the same as described above.

[0153] like Figure 15 and Figure 16 As shown, in the x-direction, the width W3 of the first portion 410A of the first insulating layer 410 can be smaller than the width W5 of the opening 610OP of the light-blocking portion 610. The side surface of the first portion 410A (e.g., the side surface of a positively tapered bevel) can overlap with one of the color filters. Figure 15 As shown, the side surface of the first portion 410A can directly contact the first color filter 620a. The color filter can have a refractive index lower than the first refractive index of the first insulating layer 410. As an example, the color filter can have a refractive index of about 1.5.

[0154] like Figure 15 As shown, due to the refractive index difference between the first portion 410A and the first color filter 620a, light emitted from the emitting layer 222 (e.g., the fifth light L5) can be bent and then travel in the z-direction. Additionally, as referenced above... Figure 6 As described, light emitted from the emitting layer 222 (e.g., second light L2) can be bent at the side surface of the second insulating layer 430 defining the second opening 430OP to travel in the z direction.

[0155] The width W3 of the first portion 410A can be equal to or greater than the width W1 of the first opening 190'OP, and equal to or greater than the width W2 of the second opening 430OP. In the embodiment, although in Figure 15The diagram shows that the width W3 of the first portion 410A is greater than the width W1 of the first opening 190'OP and the width W2 of the second opening 430OP, but embodiments of the invention are not limited thereto. In another embodiment, the width of the first portion 410A of the first insulating layer 410 may be less than the width of the first opening 190'OP of the dike layer 190' and the width of the second opening 430OP of the second insulating layer 430. In another embodiment, the width of the first portion 410A of the first insulating layer 410 may be greater than the width of the first opening 190'OP of the dike layer 190' and less than the width of the second opening 430OP of the second insulating layer 430.

[0156] In the plan view, the second opening 430OP of the second insulating layer 430 may overlap with the first opening 190'OP, the first portion 410A, and the opening 610OP of the light-blocking portion 610. The width W2 of the second opening 430OP of the second insulating layer 430 may be equal to or less than the width W5 of the opening 610OP of the light-blocking portion 610. In another embodiment, in the x-direction, the width of the second opening 430OP of the second insulating layer 430 may be greater than the width of the opening 610OP of the light-blocking portion 610. The side surface of the second insulating layer 430 defining the second opening 430OP may directly contact the third insulating layer 450, and the second light L2 emitted from the emitting layer 222 may be refracted at the side surface of the second insulating layer 430 to travel in the z-direction.

[0157] It should be understood that the embodiments described herein should be considered descriptive only and not for limiting purposes. The description of features or aspects in each embodiment should generally be considered as other similar features or aspects that can be used in other embodiments. Although one or more embodiments have been described with reference to the accompanying drawings, it will be understood by those skilled in the art that various changes in form and detail may be made without departing from the spirit and scope defined by the appended claims.

Claims

1. A display device, comprising: First electrode; The embankment is defined by a first opening that overlaps with the first electrode in the plan view; The emission layer overlaps with the first electrode through the first opening; The second electrode is located on the emission layer; The encapsulation layer is located on the second electrode; A first insulating layer is located on the encapsulation layer, wherein the first insulating layer includes a first portion that overlaps with the first opening and defines a main trench around the first portion; The touch electrode is located on the first insulating layer; A second insulating layer is located on the touch electrode and defines a second opening that overlaps with the first opening; and The third insulating layer is located on top of the second insulating layer.

2. The display device according to claim 1, wherein, The first refractive index of the first insulating layer is greater than each of the second refractive index of the second insulating layer and the third refractive index of the third insulating layer, wherein the third refractive index of the third insulating layer is greater than the second refractive index of the second insulating layer.

3. The display device according to claim 1, wherein, The first insulating layer includes a multilayer structure, wherein the multilayer structure includes a first sub-insulating layer and a second sub-insulating layer. The touch electrode includes a metal wire that surrounds at least a portion of the first opening in the plan view, and The metal wire is disposed on at least one of the first sub-insulation layer and the second sub-insulation layer.

4. The display device according to claim 1, wherein, The side surface of the first portion includes a conical inclined surface, wherein the inclined surface of the side surface of the first portion has an angle of 40 degrees to 80 degrees.

5. The display device according to claim 1, wherein, The width of the second opening in the second insulating layer is equal to or greater than the width of the first opening in the dam layer.

6. The display device according to claim 1, wherein, The edge of the second opening defined by the second insulating layer is disposed on the first portion.

7. The display device according to claim 1, wherein, The edge of the second insulating layer defining the second opening is arranged in the main trench.

8. The display device according to claim 1, wherein, The first portion of the first insulating layer includes a first sub-portion and a second sub-portion spaced apart from each other relative to the sub-grooves surrounded by the main trench.

9. The display device according to any one of claims 1 to 8, further comprising a light filter layer disposed between the first insulating layer and the second insulating layer and comprising a light blocking portion and a color filter.

10. A display device, comprising: A light-emitting diode includes a first electrode, a second electrode, and an emitting layer located between the first electrode and the second electrode; A dam layer, in a plan view, overlaps with the first electrode of the light-emitting diode and defines a first opening, the first opening defining the emission region of the light-emitting diode; A first insulating layer is located on the light-emitting diode and has a first refractive index, wherein the first insulating layer includes a first portion overlapping the first opening and a second portion spaced apart from the first portion, and a main trench is located between the first portion and the second portion; A second insulating layer, located on the first insulating layer, has a second refractive index different from the first refractive index, and defines a second opening that overlaps with the first opening in the plan view; and A third insulating layer is located on the second insulating layer and has a third refractive index that is different from the second refractive index.

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