Organic light emitting diode display device

Abstract

An organic light emitting diode display device, comprising: a substrate having a light emitting area and a non-light emitting area; an overcoat layer over the substrate, the overcoat layer comprising a first protrusion and a first recess, the protrusion comprising: a bottom surface portion; a top surface portion; and a side surface portion between the bottom surface portion and the top surface portion; a first electrode over the overcoat layer; a light emitting layer over the first electrode; and a second electrode over the light emitting layer, wherein the side surface portion is a primary light emitting area having a first light emission spectrum, and the first recess is a secondary light emitting area having a second light emission spectrum different from the first light emission spectrum, and wherein the primary light emitting area and the secondary light emitting area are effective light emitting areas.

Description

[0001] This application is a divisional application of Chinese patent application No. 201910747406.9 entitled "Organic Light Emitting Diode Display Device". The application date of patent application No. 201910747406.9 is August 13, 2019, and the priority date is August 14, 2018.

[0002] Cross-reference to related applications

[0003] This application claims priority to Korean Patent Application No. 10-2018-0094903, filed in Korea on August 14, 2018, the entire contents of which are incorporated herein by reference for all purposes as if fully set forth herein. Technical Field

[0004] This invention relates to organic light-emitting diode (OLED) display devices, and more particularly to OLED display devices in which light extraction efficiency is improved. Background Technology

[0005] Recently, with the advent of the information-oriented society, the display field has developed rapidly due to increased interest in information displays for processing and displaying large amounts of information and the growing demand for portable information media. Consequently, a wide variety of thin and light flat panel display devices have been developed and have become prominent.

[0006] Among a wide variety of flat panel display devices, organic light-emitting diode (OLED) displays are light-emitting devices and do not require backlight units as used in non-light-emitting devices such as liquid crystal displays (LCDs). Therefore, OLED displays are lightweight and thin.

[0007] Furthermore, compared to LCD devices, OLED displays offer advantages in viewing angle, contrast ratio, and power consumption. In addition, OLED displays can be driven with low DC voltage and have a fast response time. Moreover, because the internal components of OLED displays are solid-phase, they exhibit high durability against external shocks and a wide operating temperature range.

[0008] In OLED displays, a significant amount of light is lost as it passes through various components and reaches the outside. Therefore, only about 20% of the light emitted from the emissive layer reaches the outside of an OLED display.

[0009] Here, since the amount of light emitted from the emissive layer increases with the amount of current applied to the OLED display device, the brightness of the OLED display device can be further increased by applying more current to the emissive layer. However, this would increase power consumption and reduce the lifespan of the OLED display device.

[0010] Therefore, in order to improve the light extraction efficiency of OLED display devices, an OLED display device in which a microlens array (MLA) is attached to the outer surface of the substrate or the microlenses are formed in the outer coating has been proposed.

[0011] However, even when the microlens array is attached to the outer surface of the OLED display device or the microlens is formed in the OLED display device, a large amount of light is confined within the OLED display device and only a small amount of light is extracted to the outside. Summary of the Invention

[0012] Therefore, the present invention relates to an organic light-emitting diode display device that substantially eliminates one or more problems caused by the limitations and disadvantages of related technologies.

[0013] The purpose of this invention is to provide an organic light-emitting diode display device in which light extraction efficiency is improved.

[0014] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practice of the invention. These and other advantages of the invention will be realized and obtained by means of the structures particularly pointed out in the written description and claims and the accompanying drawings.

[0015] To achieve these and other advantages and for the purposes of the invention, as realized and broadly described herein, an organic light-emitting diode (OLED) display device includes: a substrate having light-emitting and non-light-emitting regions; an outer coating layer over the substrate, the outer coating layer including protrusions and recesses, the protrusions including: a bottom surface portion; a top surface portion; and a side surface portion between the bottom surface portion and the top surface portion; a first electrode over the outer coating layer; a light-emitting layer over the first electrode; and a second electrode over the light-emitting layer, wherein the side surface portion is a main light-emitting region having a first emission spectrum, and the recesses are auxiliary light-emitting regions having a second emission spectrum different from the first emission spectrum, wherein the main light-emitting region and the auxiliary light-emitting region are effective light-emitting regions.

[0016] It should be understood that both the foregoing general description and the following detailed description are exemplary and illustrative and are intended to provide further explanation of the claimed invention. Attached Figure Description

[0017] This application includes accompanying drawings to provide a further understanding of the invention, and the drawings are incorporated in and constitute a part of this specification. The drawings illustrate embodiments of the invention and, together with the description, serve to illustrate the principles of the invention. In the drawings:

[0018] Figure 1This is a cross-sectional view showing an organic light-emitting diode display device according to a first embodiment of the present disclosure;

[0019] Figure 2 This is a plan view illustrating an organic light-emitting diode display device according to one embodiment of the present disclosure;

[0020] Figure 3 It is along Figure 2 A cross-sectional view taken from line II-II;

[0021] Figure 4 This is a graph showing the emission spectrum of white light emitted from the main light-emitting region and the auxiliary light-emitting region of an organic light-emitting diode display device according to an embodiment of the present disclosure; and

[0022] Figures 5A-5D The following graphs show the emission spectrum of the auxiliary light-emitting region of an organic light-emitting diode display device according to one embodiment of the present disclosure. Detailed Implementation

[0023] Reference will now be made in detail to this disclosure, embodiments of which are described in the accompanying drawings.

[0024] Figure 1 This is a cross-sectional view illustrating an organic light-emitting diode (OLED) display device according to one embodiment of the present disclosure. All components of the OLED display device according to all embodiments of the present disclosure are operatively coupled and configured.

[0025] exist Figure 1 In this context, the organic light-emitting diode (OLED) display device 100 can be either top-emitting or bottom-emitting, depending on the direction of light emission. A bottom-emitting OLED display device can be illustrated exemplarily below.

[0026] The OLED display device 100 includes: a substrate 101 having a driving thin-film transistor (TFT) DTr and a light-emitting diode E on the substrate 101; and a protective film 102 encapsulating the substrate 101.

[0027] The substrate 101 includes a plurality of pixel regions P, and each pixel region P includes: a light-emitting region EA in which a light-emitting diode E is disposed and substantially displays an image; and a non-light-emitting region NEA along the edge of the light-emitting region EA. The non-light-emitting region NEA includes a switching region TrA in which a driving TFT DTr is disposed.

[0028] A semiconductor layer 103 is disposed in the switching region TrA of the non-light-emitting region NEA of the pixel region P above the substrate 101. The semiconductor layer 103 may include silicon and may have an active region 103a in the central portion and source regions 103b and drain regions 103c in the side portions of the active region 103a. The active region 103a may be used as a channel for driving the TFT DTr, and the source regions 103b and drain regions 103c may be doped with a relatively high concentration of impurities.

[0029] A gate insulating layer 105 is disposed above the semiconductor layer 103.

[0030] A gate electrode 107 and a gate line (not shown) are disposed above the gate insulating layer 105. The gate electrode 107 corresponds to the active region 103a of the semiconductor layer 103, and the gate line is connected to the gate electrode 107 and extends in one direction.

[0031] A first interlayer insulating layer 109a is provided above the gate electrode 107 and the gate line. The first insulating layer 109a and the gate insulating layer 105 have first and second semiconductor contact holes 116 that expose the source region 103b and the drain region 103c in the two side portions of the active region 103a.

[0032] A source electrode 110a and a drain electrode 110b, spaced apart from each other, are disposed above a first interlayer insulating layer 109a having first and second semiconductor contact holes 116. The source electrode 110a is connected to the source region 103b through the first semiconductor contact hole 116, and the drain electrode 110b is connected to the drain region 103c through the second semiconductor contact hole 116.

[0033] A second interlayer insulating layer 109b is provided above the source electrode 110a and the drain electrode 110b, and above the first interlayer insulating layer 109a exposed between the source electrode 110a and the drain electrode 110b.

[0034] The source electrode 110a, the drain electrode 110b, a semiconductor layer 103 including a source region 103b and a drain region 103c that respectively contact the source electrode 110a and the drain electrode 110b, a gate insulating layer 105 and a gate electrode 107 constitute a driving TFT DTr.

[0035] Although not shown, data lines may be disposed above the second interlayer insulating layer 109b. The data lines may intersect with the gate lines to define each pixel region P. A switching TFT having the same structure as the driving TFT DTr may be connected to the driving TFT DTr.

[0036] According to semiconductor layer 103, the switching TFT and driving TFT DTr can exemplary have one of amorphous silicon (a-Si) TFT, polycrystalline silicon (p-Si) TFT, monocrystalline silicon (c-Si) TFT, and oxide TFT. Although Figure 1 In the first embodiment, the switching TFT and driving TFT DTr have a top-gate type in which the semiconductor layer 103 comprises polycrystalline silicon or oxide semiconductor material, but in another embodiment, the switching TFT and driving TFT DTr may have a bottom-gate type in which the semiconductor layer 103 comprises intrinsic amorphous silicon and doped amorphous silicon.

[0037] The substrate 101 may comprise glass or a flexible (bendable, foldable, rollable) transparent plastic. When the substrate 101 comprises a transparent plastic, a polyimide with excellent heat resistance can be used in the substrate 101 based on a high-temperature deposition process. The entire surface of the substrate 101 may be covered with a buffer layer (not shown).

[0038] The driving TFT DTr in the switching region TrA has the characteristic that its threshold voltage is shifted by light. To prevent the threshold voltage shift, a light-shielding layer (not shown) can be provided below the semiconductor layer 103 in the OLED display device 100.

[0039] Since the light-shielding layer between the substrate 101 and the semiconductor layer 103 blocks the light incident on the semiconductor layer 103 through the substrate 101, the threshold voltage shift of the driving TFT DTr caused by external light can be minimized or prevented. The light-shielding layer can be covered by a buffer layer.

[0040] A wavelength conversion layer 106 is provided above the second interlayer insulating layer 109b, corresponding to the light-emitting area EA of each pixel area P.

[0041] The wavelength conversion layer 106 may include a color filter that transmits only light with a wavelength having a predetermined color corresponding to each pixel region P in white light emitted from the light-emitting diode E to the substrate 101.

[0042] The wavelength conversion layer 106 can transmit only light with wavelengths corresponding to red, green, or blue. For example, in the OLED display device 100, a single unit pixel area may include red, green, and blue pixel areas P, and the wavelength conversion layer 106 in the red, green, and blue pixel areas P may include red, green, and blue color filters, respectively.

[0043] In the OLED display device 100, a single unit pixel area may also include a white pixel area in which the wavelength conversion layer 106 is not disposed.

[0044] In another embodiment, the wavelength conversion layer 106 may include quantum dots having a size capable of emitting light corresponding to a predetermined color for each pixel region P based on white light emitted from the light-emitting diode E to the substrate 101. Here, the quantum dots may include at least one selected from the group consisting of: CdS, CdSe, CdTe, ZnS, ZnSe, ZnTe, HgS, HgSe, HgTe, CdSeS, CdSeTe, CdSTe, ZnSeS, ZnSeTe, ZnSTe, HgSeS, HgSeTe, HgSTe, CdZnS, CdZnSe, CdZnTe, CdHgS, CdHgSe, CdHgTe, HgZnS, HgZnSe, HgZnTe, CdZnSeS, CdZnSeTe, CdZnSTe, Cd HgSeS, CdHgSeTe, CdHgSTe, HgZnSeS, HgZnSeTe, HgZnSTe, GaN, GaP, GaAs, AlN, AlP, AlAs, InN, InP, InAs, GaNP, GaNAs, GaPAs, AlNP, AlNAs, AlPAs, InNP, InNAs, InPAs, GaAlNP, GaAlNAs, GaAlPAs, GaInNP, GaInNAs, GaInPAs, InAlNP, InAlNAs, InAlPAs, and SbTe. However, quantum dot materials are not limited to these.

[0045] For example, the wavelength conversion layer 106 in the red pixel region may include CdSe or InP quantum dots, the wavelength conversion layer 106 in the green pixel region may include CdZnSeS quantum dots, and the wavelength conversion layer 106 in the blue pixel region may include ZnSe quantum dots. The OLED display device 100, where the wavelength conversion layer 106 includes quantum dots, can have relatively high color reproducibility.

[0046] In another embodiment, wavelength conversion layer 106 may include a color filter containing quantum dots.

[0047] An outer coating 108 is provided above the wavelength conversion layer 106, having a first drain contact hole 108a through which the drain electrode 110b is exposed via a second interlayer insulating layer 109b. The outer coating 108 has a plurality of recesses 118 and a plurality of protrusions 117 above its top surface. The plurality of recesses 118 and the plurality of protrusions 117 are arranged alternately to form a microlens ML.

[0048] The outer coating 108 may include an insulating material with a refractive index of 1.5. For example, the outer coating 108 may include one of acrylic resin, epoxy resin, phenolic resin, polyamide resin, polyimide resin, unsaturated polyester resin, polyphenylene sulfide resin, benzocyclobutene, and photoresist. However, the material of the outer coating 108 is not limited to these.

[0049] The plurality of protrusions 117 may have a structure that defines or surrounds the plurality of recesses 118, and may have a bottom surface portion 117a, a top surface portion 117b and a side surface portion 117c.

[0050] The side surface portion 117c can be the entire inclined surface constituting the top surface portion 117b. The slope of the side surface portion 117c can increase from the bottom surface portion 117a to the top surface portion 117b, such that the side surface portion 117c can have a maximum slope Smax at the portion adjacent to the top surface portion 117b.

[0051] Since the path of light emitted from the light-emitting layer 113 is changed to face the substrate 101 through multiple protrusions 117, the light extraction efficiency of the OLED display device 100 is increased.

[0052] A first electrode 111 is disposed above the outer coating 108 constituting the microlens ML and connected to the drain electrode 110b of the driving TFT DTr. For example, the first electrode 111 may be the anode of the light-emitting diode E and may comprise a material with a relatively high work function.

[0053] A first electrode 111 is disposed in each pixel region P, and a dam 119 is disposed between the first electrodes 111 in adjacent pixel regions P. The first electrodes 111 are spaced apart in each pixel region P by the dam 119, which serves as the boundary between adjacent pixel regions P.

[0054] The dam 119 includes an opening that exposes the first electrode 111, and the opening of the dam 119 is configured to correspond to the light-emitting region EA. A plurality of protrusions 117 and a plurality of recesses 118 constituting the microlens ML are provided throughout the opening of the dam 119. For example, the plurality of protrusions 117 and the plurality of recesses 118 can contact the edge portion of the dam 119.

[0055] Furthermore, the opening of the dam 119 is configured to correspond to the wavelength conversion layer 106. For example, the edge portion of the dam 119 may overlap with the edge portion of the wavelength conversion layer 106. Since the wavelength conversion layer 106 overlaps with the dam 119, leakage of light that has not passed through the wavelength conversion layer 106 is prevented.

[0056] A light-emitting layer 113 is disposed above the first electrode 111. The light-emitting layer 113 may have a single layer of light-emitting material. Alternatively, the light-emitting layer 113 may have multiple layers including a hole injection layer, a hole transport layer, a light-emitting material layer, an electron transport layer, and an electron injection layer to increase luminous efficiency.

[0057] The first electrode 111 and the light-emitting layer 113, sequentially located above the outer coating 108, can have shapes based on the morphology of a plurality of protrusions 117 and a plurality of recesses 118 on the top surface of the outer coating 108 to form a microlens ML.

[0058] A second electrode 115 is disposed above the entire light-emitting layer 113. For example, the second electrode 115 may be a cathode.

[0059] The second electrode 115 may have a shape that conforms to the top surface of the outer coating 108, including a plurality of protrusions 117 and a plurality of recesses 118, in order to form a microlens ML.

[0060] When a voltage is applied to the first electrode 111 and the second electrode 115 according to a signal, holes injected from the first electrode 111 and electrons injected from the second electrode 115 are transported to the light-emitting layer 113 to form excitons. When the excitons transition from the excited state to the ground state, they can emit light from the light-emitting layer 113 as visible light.

[0061] Light from the light-emitting layer 113 can pass through the transparent first electrode 111 to be emitted outwards to display an image.

[0062] Since the outer coating 108 forms a microlens ML, light confined inside the light-emitting layer 113 due to total internal reflection can be transmitted through the microlens ML of the outer coating 108 at an angle smaller than the critical angle for total internal reflection, and thus extracted to the outside through multiple reflections. Therefore, the light extraction efficiency of the OLED display device 100 is improved.

[0063] Furthermore, since the outer coating 108, the first electrode 111, the light-emitting layer 113, and the second electrode 115 are provided in the entire opening of the embankment 119 corresponding to the light-emitting region EA, the entire light-emitting region EA is used for the microlens ML, which maximizes the light extraction efficiency.

[0064] A thin-film protective film 102 is disposed above the driving TFT DTr and the light-emitting diode E, and a surface seal 104 is disposed between the light-emitting diode E and the protective film 102. The surface seal 104 may comprise an organic material or a transparent and adhesive inorganic material. The protective film 102 and the substrate 101 can be attached to each other through the surface seal 104 to encapsulate the OLED display device 100.

[0065] To prevent external oxygen and moisture from penetrating the interior of the OLED display device 100, the protective film 102 may include at least two inorganic protective films. An organic protective film to supplement the impact resistance of the at least two inorganic protective films may be placed between the at least two inorganic protective films.

[0066] In a structure where organic and inorganic protective films are layered alternately, the inorganic protective film can completely enclose the organic protective film, thus preventing moisture and oxygen from penetrating through the side surface of the organic protective film.

[0067] Therefore, it can prevent moisture and oxygen from penetrating from the outside of the OLED display device 100 into the inside.

[0068] In the OLED display device 100, a polarizing plate (not shown) for preventing contrast reduction caused by external light can be provided above the outer surface of the transparent substrate 101. Since the polarizing plate that blocks external light is provided above the surface of the OLED display device 100 in the driving mode of emitting light from the light-emitting layer 113, the contrast is increased.

[0069] In the OLED display device 100, since the surface of the outer coating 108 forms a microlens ML, the first electrode 111, the light-emitting layer 113, and the second electrode 115 sequentially above the outer coating 108 form the microlens ML. Therefore, the light extraction efficiency of the light emitted from the light-emitting diode E is increased.

[0070] Specifically, due to the light-emitting layer 113 ( Figure 3 The effective light-emitting region B is formed at the side surface portion 117c of the concave portion 118 and the convex portion 117, therefore the effective light-emitting region B can be divided into ( Figure 3 The main luminescent region C and ( Figure 3 The auxiliary light-emitting region D. Therefore, the entire light-emitting region of the light-emitting layer 113 constituting the microlens ML can be expanded and the light extraction efficiency can be increased.

[0071] Since the emission spectrum of the auxiliary emission region D is adjusted to have a wide variety of values, the efficiency can be increased in a variety of ways depending on the purpose and effect.

[0072] Figure 2 This is a plan view illustrating an organic light-emitting diode display device according to one embodiment of the present disclosure. Figure 3 It is along Figure 2 The cross-sectional view obtained from line II-II.

[0073] exist Figure 2 In the middle, including the area of ​​the microlens ML of the OLED display device 100 ( Figure 1The recesses 118 can have a hexagonal shape in the plan view. For example, the region including the microlens ML can have a hexagonal honeycomb structure in the plan view. In addition, the recesses 118 can be arranged linearly along a first direction (horizontal direction) and a diagonal direction, and can be staggered along a second direction (vertical direction). Furthermore, adjacent recesses 118 can be connected to each other by connecting portions (protrusions 117), and the connecting portions (protrusions 117) can form a hexagonal shape or a honeycomb structure in the plan view.

[0074] However, the area including the microlens ML is not limited to this and can have a wide variety of shapes such as semicircular, semi-elliptical and rectangular.

[0075] The region including the microlens ML can be divided into: a first region E1 corresponding to the top surface portion 117b of the protrusion 117 of the outer coating 108; a second region E2 corresponding to the side surface portion 117c of the protrusion 117 of the outer coating 108 between the protrusion 117 and the recess 118; and a third region E3 corresponding to the recess 118 of the outer coating 108.

[0076] exist Figure 3 In the microlens ML, the protrusion 117 of the outer coating 108 may have a bottom surface portion 117a, a top surface portion 117b, and a side surface portion 117c. The side surface portion 117c may be the entire slanted surface of the top surface portion 117b formed by connecting the bottom surface portion 117a and the top surface portion 117b.

[0077] The top surface portion 117b of the protrusion 117 of the outer coating 108 corresponds to the first region E1 in the plan view. The side surface portion 117c corresponds to the second region E2, and the recess 118 corresponds to the third region E3.

[0078] For example, the angle θ of the tangent C1 of the side surface portion 117c relative to the horizontal surface (i.e., the bottom surface portion 117a) can be in the range of 20 degrees to 60 degrees. When the angle θ is less than 20 degrees, the transmission angle of the light in the light-emitting layer 113 with the microlens ML does not change significantly compared to the transmission angle of the light in the flat light-emitting layer. Therefore, the light extraction efficiency cannot be sufficiently improved.

[0079] When the angle θ is greater than 60 degrees, the transmission angle of the light in the light-emitting layer 113 becomes greater than that of the substrate 101. Figure 1The critical angle for total internal reflection at the interface between the light-emitting layer (LEL) and the external air layer. Therefore, the amount of light confined in the OLED display device 100 increases, and the light extraction efficiency of the light-emitting layer 113 with microlenses ML decreases compared to the light extraction efficiency of a planar light-emitting layer. In embodiments of the invention, the side surface portion 117c and the top surface portion 117b may be configured to have an arcuate shape. However, embodiments of the invention are not limited thereto.

[0080] Therefore, the angle θ of the tangent C1 of the side surface portion 117c relative to the horizontal surface (i.e., the bottom surface portion 117a) can be determined to be in the range of 20 degrees to 60 degrees. For example, the angle θ of the tangent C1 of the recess 118 and the top surface portion 117b relative to the horizontal surface (i.e., the bottom surface portion 117a) can be less than 20 degrees, and the angle θ of the tangent C1 of the side surface portion 117c relative to the horizontal surface (i.e., the bottom surface portion 117a) can be greater than 20 degrees.

[0081] To further increase the light extraction efficiency of the light-emitting layer 113, the protrusion 117 of the outer coating layer 108 may have a structure in which the top surface portion 117b has a sharp shape. For example, the protrusion 117 may have a triangular cross-section including a vertex corresponding to the top surface portion 117b, a bottom edge corresponding to the bottom surface portion 117a, and a hypotenuse corresponding to the side surface portion 117c.

[0082] The angle θ of the side surface portion 117c of the protrusion 117 of the outer coating 108 can gradually increase from the bottom surface portion 117a to the top surface portion 117b. Angle θ is defined as the angle between the tangent C1 of the side surface portion 117c and the horizontal surface (i.e., the bottom surface portion 117a). When angle θ reaches its maximum value, the side surface portion 117c can have a maximum slope Smax. The slope can be defined by the tangent of the angle (tanθ).

[0083] In the OLED display device 100, since the light-emitting layer 113 is disposed above the outer coating layer 108 constituting the microlens ML, the light-emitting layer 113 can have different thicknesses d1, d2, and d3 in different regions. The light-emitting layer 113 can be formed to have different thicknesses d1, d2, and d3 corresponding to the concave portions 118 and convex portions 117 of the microlens ML.

[0084] The thickness of the light-emitting layer 113 can be defined as the length of the tangent C1 perpendicular to the light-emitting layer 113. For example, the third thickness d3 of the light-emitting layer 113 corresponding to the side surface portion 117c of the protrusion 117 of the microlens ML can be less than the first thickness d1 of the light-emitting layer 113 corresponding to the concave portion 118 and the second thickness d2 of the light-emitting layer 113 corresponding to the top surface portion 117b of the protrusion 117.

[0085] Since the light-emitting layer 113 is formed above the outer coating 108 having the microlens ML, the side surface portion 117c of the protrusion 117 of the outer coating 108 can have an angle θ that gradually increases from the bottom surface portion 117a to the top surface portion 117b. Therefore, the third thickness d3 of the light-emitting layer 113 corresponding to the side surface portion 117c is less than the first thickness d1 of the light-emitting layer 113 corresponding to the recess 118 and the second thickness d2 of the light-emitting layer 113 corresponding to the top surface portion 117b.

[0086] In the light-emitting diode E, light emission occurs in regions with relatively high current density. Since the light-emitting layer 113 has a relatively small thickness d3 in the side surface portion 117c of the convex portion 117 compared to its thickness in the top surface portion 117b of the recess 118 and the convex portion 117, the light-emitting layer 113 can have a relatively high current density and relatively strong light emission in the side surface portion 117c of the convex portion 117. Conversely, since the light-emitting layer 113 has relatively large thicknesses d1 and d2 in the top surface portion 117b of the recess 118 and the convex portion 117, the light-emitting layer 113 can have a relatively low current density and relatively weak light emission in the top surface portion 117b of the recess 118 and the convex portion 117.

[0087] Therefore, in the OLED display device 100, the side surface portion 117c of the protrusion 117 that emits strong light can be defined as the main light-emitting region C. When the light-emitting diode E is driven, the electric field is locally concentrated in the main light-emitting region C to generate a main current line and generate main light emission.

[0088] Compared to the main light-emitting region C, the top surface portion 117b of the concave portion 118 and the convex portion 117, which emit weak light, can be defined as the auxiliary light-emitting region D. The main light-emitting region C and the auxiliary light-emitting region D constitute the effective light-emitting region B of the OLED display device 100.

[0089] In the OLED display device 100, when the area (diameter) corresponding to the distance between adjacent top surface portions 117b of the protrusion 117 is defined as a unit cell, the entire unit cell constitutes an effective light-emitting area B.

[0090] The current density difference between the main light-emitting region C and the auxiliary light-emitting region D can be as low as 0.0001 A / cm². 2 up to 0.05A / cm 2 Within the range.

[0091] When the current density difference between the main light-emitting region C and the auxiliary light-emitting region D is less than 0.0001 A / cm 2 Alternatively, the current density difference between the main luminescent region C and the auxiliary luminescent region D is greater than 0.05 A / cm². 2At this time, there is basically no light emission in the auxiliary light-emitting region D, or a relatively high current can be applied to the main light-emitting region C.

[0092] For example, when 0.06A / cm 2 When a current of 0.01 A / cm is applied to the main light-emitting region C, it can reduce the emission rate to 0.01 A / cm. 2 Up to 0.0599A / cm 2 A current is applied to the auxiliary light-emitting region D, such that the current density difference between the main light-emitting region C and the auxiliary light-emitting region D is less than 0.0001 A / cm². 2 up to 0.05A / cm 2 Within the range.

[0093] When it has less than 0.01A / cm 2 When a current with a current density greater than 0.05 A / cm² is applied to the auxiliary light-emitting region D, virtually no light emission occurs in the auxiliary light-emitting region D. 2 When a current of a certain current density is applied to the auxiliary light-emitting region D, the current applied to the main light-emitting region C increases, and the total driving current used to drive the OLED display device 100 increases.

[0094] As the total driving current increases, the OLED display device 100 degrades and its luminous efficiency decreases. Therefore, the lifespan of the OLED display device 100 is shortened. Furthermore, the degradation of the OLED display device 100 affects the pixel area P( Figure 1 The values ​​of the pixels are different, so the difference in degradation of pixel region P will cause brightness deviation.

[0095] Therefore, the current density difference between the main light-emitting region C and the auxiliary light-emitting region D can be 0.0001 A / cm². 2 up to 0.05A / cm 2 Within the range.

[0096] In the OLED display device 100 where the main light-emitting region C and the auxiliary light-emitting region D constitute the effective light-emitting region B, the light extraction efficiency can be increased because the effective light-emitting region B of the light-emitting layer 113 constituting the microlens ML is expanded.

[0097] Although the luminous intensity of the auxiliary light-emitting region D is less than that of the main light-emitting region C, the total luminous intensity of the OLED display device 100 is increased compared to an OLED display device that only includes the main light-emitting region C.

[0098] Specifically, in the OLED display device 100, since the thicknesses d1, d2 and d3 of the light-emitting layer 113 are different in the main light-emitting region C and the auxiliary light-emitting region D, the light-emitting layer 113 has different emission spectra in the main light-emitting region C and the auxiliary light-emitting region D.

[0099] Therefore, in the OLED display device 100, the light emitted from the main light-emitting region C is used to display the image, and the light emitted from the auxiliary light-emitting region D is used to assist or compensate for the light emitted from the main light-emitting region C.

[0100] Figure 4 This is a graph showing the emission spectrum of white light emitted from the main light-emitting region and the auxiliary light-emitting region of an organic light-emitting diode display device according to one embodiment of the present disclosure.

[0101] exist Figure 4 In this diagram, the x-axis represents the wavelength of light and the y-axis represents the intensity of light. Intensity is a relative value with respect to the maximum value of the emission spectrum. For example, a value of 0.34 (arbitrary unit: au) for the blue emission spectrum can be the maximum value, and the relative values ​​of the yellow-green emission spectrum with respect to the maximum value can also be shown.

[0102] Curve F represents the emission spectrum of white light emitted from the main emitting region C, and curve G represents the emission spectrum of white light emitted from the auxiliary emitting region D. Since the intensity of the emitting layer 113 depends on the applied current, the emission spectra of curves F and G are measured by applying the same current to the light-emitting diode E. The emission spectrum of curve F may have peaks corresponding to red, green, and blue light.

[0103] The emission spectrum of curve G is shorter than that of curve F. Therefore, the main emission region C and the auxiliary emission region D have different emission spectra.

[0104] In addition, compared with the auxiliary light-emitting region D, the main light-emitting region C emits relatively strong light, and compared with the main light-emitting region C, the auxiliary light-emitting region D emits relatively weak light.

[0105] In the main light-emitting region C, main light emission occurs because the light-emitting layer 113, with a relatively small thickness d3, has a relatively high current density. In the auxiliary light-emitting region D, auxiliary light emission occurs because the light-emitting layer 113, with relatively large thicknesses d1 and d2, has a relatively low current density.

[0106] Curve H represents the emission spectrum of the entire white light emitted from the OLED display device 100. The emission spectrum of curve H, corresponding to the main emitting region C and the auxiliary emitting region D, is greater than the emission spectrum of curve F, corresponding to the main emitting region C. (H = F + G)

[0107] In the OLED display device 100, since the main light-emitting region C and the auxiliary light-emitting region D constitute the effective light-emitting region B, the effective light-emitting region B of the light-emitting layer 113 constituting the microlens ML is expanded and the light extraction efficiency is increased.

[0108] The emission spectrum of the auxiliary emission region D can be adjusted in a variety of ways by changing the current applied to the light-emitting diode E, the thicknesses d1 and d2 of the light-emitting layer 113 corresponding to the top surface portions 117b of the concave portion 118 and the convex portion 117 of the lens ML, and the shape of the microlens ML.

[0109] Figure 5A This is a graph showing the emission spectrum of the auxiliary light-emitting region of an organic light-emitting diode display device according to one embodiment of the present disclosure.

[0110] exist Figure 5A In this design, the auxiliary light-emitting region D is designed to increase the luminous efficiency of both blue and red light in a similar manner. Figure 5A The emission spectrum can have two peaks corresponding to red and blue light.

[0111] Figure 5B This is a graph showing the emission spectrum of the auxiliary light-emitting region of an organic light-emitting diode display device according to one embodiment of the present disclosure.

[0112] exist Figure 5B In this design, the auxiliary light-emitting region D is designed to similarly increase the luminous efficiency of blue, green, and red light. Figure 5B The emission spectrum can have three peaks corresponding to red, green and blue light.

[0113] Figure 5C This is a graph showing the emission spectrum of the auxiliary light-emitting region of an organic light-emitting diode display device according to one embodiment of the present disclosure.

[0114] exist Figure 5C In this design, the auxiliary light-emitting region D is designed to further increase the luminous efficiency of red light compared to that of green light, and further increase the luminous efficiency of blue light compared to that of red light. Figure 5C The emission spectrum can have three peaks corresponding to red, green and blue light.

[0115] Figure 5D This is a graph showing the emission spectrum of the auxiliary light-emitting region of an organic light-emitting diode display device according to one embodiment of the present disclosure. Figure 5D The emission spectrum can have a peak corresponding to blue light.

[0116] exist Figure 5D In this design, the auxiliary light-emitting region D is designed to increase the luminous efficiency of blue light only.

[0117] The main luminescent region C is in Figures 5A to 5D They have the same emission spectrum. (And including...) Figure 5C and Figure 5D Compared to OLED display devices with an auxiliary light-emitting region D, including Figure 5A The x-coordinate (Wx) and y-coordinate (Wy) of the white light in the auxiliary light-emitting region D of the OLED display device are reduced. This includes... Figure 5B The x and y color coordinates of the white light from the auxiliary light-emitting region D of the OLED display device remain unchanged. Figure 5C The white light of the OLED display device in the auxiliary light-emitting region D is reduced only at the x-color coordinate.

[0118] include Figure 5D The x and y color coordinates of the white light in the auxiliary light-emitting region D of the OLED display device are reduced, and in the area including Figure 5D In an OLED display device with an auxiliary light-emitting region D, the change in the x-color coordinate (ΔWx) is smaller than the change in the y-color coordinate (ΔWy).

[0119] The emission spectrum of the auxiliary light-emitting region D can affect the entire emission spectrum of the OLED display device 100. Specifically, the emission spectrum of the auxiliary light-emitting region D can be designed in various ways according to the purpose and effect.

[0120] For example, in including Figure 5B In the OLED display device 100 with auxiliary light-emitting region D, the efficiency of red, green and blue light is increased compared to an OLED display device that only includes the main light-emitting region C, thus increasing the luminous efficiency and the efficiency of full-color driving.

[0121] In addition, in including Figure 5D In the OLED display device 100 with auxiliary light-emitting region D, the color temperature of the OLED display device 100 increases due to the increased efficiency of blue light.

[0122] Therefore, the light emitted from the auxiliary light-emitting region D can assist or compensate for the characteristics of the light emitted from the main light-emitting region C.

[0123] In the OLED display device 100, since the effective light-emitting area B includes the main light-emitting area C and the auxiliary light-emitting area D, the entire effective light-emitting area B of the light-emitting layer 113 constituting the microlens ML is expanded and the light extraction efficiency is increased.

[0124] Furthermore, since the main luminescent region C and the auxiliary luminescent region D have different emission spectra, and the emission spectrum of the auxiliary luminescent region D is designed in various ways according to the purpose and effect, the light emitted from the auxiliary luminescent region D can assist or compensate for the light emitted from the main luminescent region C. Therefore, the luminous efficiency is increased and light with various characteristics is emitted.

[0125] Although in this embodiment, the microlens ML is set at ( Figure 1In the light-emitting region EA, but in another embodiment, the microlens ML can be configured to extend to (the light-emitting region EA). Figure 1 The non-luminescent region NEA.

[0126] When the microlens ML is placed in the non-emitting region NEA, the light extraction efficiency is further increased due to the change in the path of light toward the non-emitting region NEA and the prevention of light eccentricity toward ( Figure 1 Light leakage in adjacent pixel region P.

[0127] Therefore, in an OLED display device according to one embodiment of the present disclosure, since the effective light-emitting area includes both the main light-emitting area and the auxiliary light-emitting area, the entire effective light-emitting area of ​​the light-emitting layer constituting the microlens is expanded and the light extraction efficiency is further improved.

[0128] Furthermore, the main luminescent region and the auxiliary luminescent region have different emission spectra. Specifically, since the emission spectrum of the auxiliary luminescent region is designed in various ways according to the purpose and effect, the light emitted from the auxiliary luminescent region assists or compensates for the light emitted from the main luminescent region. Therefore, the luminous efficiency is further improved and light with various characteristics is emitted.

[0129] This disclosure also relates to, but is not limited to, the following aspects.

[0130] In this disclosure, an organic light-emitting diode (OLED) display device includes: a substrate having a light-emitting region and a non-light-emitting region; an outer coating layer above the substrate, the outer coating layer including a first protrusion and a first recess, the protrusion including a bottom surface portion; a top surface portion; and a side surface portion between the bottom surface portion and the top surface portion; a first electrode above the outer coating layer; a light-emitting layer above the first electrode; and a second electrode above the light-emitting layer, wherein the side surface portion is a main light-emitting region having a first emission spectrum, and the recess is an auxiliary light-emitting region having a second emission spectrum different from the first emission spectrum, and wherein the main light-emitting region and the auxiliary light-emitting region are effective light-emitting regions.

[0131] In this disclosure, the top surface portion corresponds to the second emission spectrum.

[0132] In this disclosure, the side surface portion has an angle in the range of 20 to 60 degrees relative to the horizontal surface, and the first recess and the top surface portion have an angle of less than 20 degrees relative to the horizontal surface.

[0133] In this disclosure, the side surface portion, the first recess, and the top surface portion are arc-shaped. The tangent of the side surface portion has an angle with respect to the horizontal surface in the range of 20 to 60 degrees, and the tangent of the first recess and the tangent of the top surface portion have an angle with respect to the horizontal surface of less than 20 degrees.

[0134] In this disclosure, the current density difference between the main light-emitting region and the auxiliary light-emitting region is 0.0001 A / cm². 2 up to 0.05A / cm 2 Within the range.

[0135] In this disclosure, a second emission spectrum assists and compensates for the first emission spectrum.

[0136] In this disclosure, the slope of the side surface portion increases from the bottom surface portion to the top surface portion.

[0137] In this disclosure, the thickness of the light-emitting layer decreases as the slope increases.

[0138] In this disclosure, the thickness of the light-emitting layer corresponding to the first protrusion is less than the thickness of the light-emitting layer corresponding to the first concave portion.

[0139] In this disclosure, the first emission spectrum has peaks corresponding to red light, green light and blue light, and the second emission spectrum has at least one peak corresponding to at least one of red light, green light and blue light.

[0140] In this disclosure, the second emission spectrum has two peaks corresponding to red light and blue light.

[0141] In this disclosure, the second emission spectrum has three peaks corresponding to red, green and blue light.

[0142] In this disclosure, the second emission spectrum has a peak corresponding to blue light.

[0143] In this disclosure, the thickness of the light-emitting layer corresponding to the side surface portion is less than the thickness of the light-emitting layer corresponding to the first recess and the top surface portion.

[0144] In this disclosure, a display device includes: a substrate having a light-emitting region and a non-light-emitting region; an outer coating layer above the substrate, the outer coating layer including a first recess and a first convex portion; a first electrode above the outer coating layer, the first electrode including a second recess and a second convex portion; a light-emitting layer above the first electrode, the light-emitting layer including a third recess and a third convex portion; and a second electrode above the light-emitting layer, the second electrode including a fourth recess and a fourth convex portion, wherein the first recess, second recess, third recess, and fourth recess are aligned with each other, the first convex portion, second convex portion, third convex portion, and fourth convex portion are aligned with each other, the first convex portion, second convex portion, third convex portion, and fourth convex portion are located in a first light-emitting region having a first light-emitting spectrum, and the first recess, second recess, third recess, and fourth recess are located in a second light-emitting region having a second light-emitting spectrum.

[0145] In this disclosure, the first emission spectrum includes peaks corresponding to wavelengths of red, green, and blue light, and the second emission spectrum includes at least one peak corresponding to at least one wavelength of red, green, or blue light.

[0146] In this disclosure, each of the second, third, and fourth recesses has a first thickness, and each of the second, third, and fourth protrusions has a second thickness less than the first thickness.

[0147] In this disclosure, the organic light-emitting diode display device further includes: a wavelength conversion layer disposed between a substrate and an outer coating; and a dam above the outer coating, the dam including an opening exposing a first electrode.

[0148] In this disclosure, the edge portion of the wavelength conversion layer extends beyond the edge portions of the first convex and the first concave towards the non-light-emitting region. The first convex and the first concave are formed in the opening, and the first convex and the first concave contact the edge portion of the embankment, which covers the edge portions of the first convex and the first concave, or the edge portion of the wavelength conversion layer, and the edge portions of the convex and the concave, as well as the edge portions of the embankment, overlap each other in the non-light-emitting region.

[0149] In this disclosure, the boundary portions of the light-emitting area and the non-light-emitting area overlap the edge portions of the first protrusion and the first concave portion, the concave portions are arranged linearly along the first direction and staggered along the second direction, or the first protrusion forms a hexagonal shape and a honeycomb structure in the plan view.

[0150] It will be apparent to those skilled in the art that various modifications and variations can be made to this invention without departing from its spirit or scope. Therefore, this invention is intended to cover such modifications and variations as long as they fall within the scope of the appended claims and their equivalents.

[0151] The present invention also provides the following technical solutions:

[0152] Note 1. An organic light-emitting diode display device, comprising:

[0153] A substrate having light-emitting and non-light-emitting regions;

[0154] An outer coating above the substrate includes a first protrusion and a first recess. The first protrusion includes a top surface portion and a side surface portion between the recess and the top surface portion. The side surface portion is located in a first luminescent region having a first luminescent spectrum, and the first recess is located in a second luminescent region having a second luminescent spectrum different from the first luminescent spectrum.

[0155] The first electrode above the outer coating;

[0156] The light-emitting layer above the first electrode; and

[0157] The second electrode is located above the light-emitting layer.

[0158] Note 2. The organic light-emitting diode display device according to Note 1, wherein the top surface portion also has the second emission spectrum.

[0159] Note 3. The organic light-emitting diode display device according to Note 2, wherein the side surface portion has an angle in the range of 20 degrees to 60 degrees relative to the horizontal surface, and the first recess and the top surface portion have an angle of less than 20 degrees relative to the horizontal surface.

[0160] Note 4. In the organic light-emitting diode display device according to Note 3, wherein the side surface portion, the first recess and the top surface portion are arc-shaped, the tangent of the side surface portion has an angle with respect to the horizontal surface in the range of 20 degrees to 60 degrees, and the tangent of the first recess and the tangent of the top surface portion have an angle with respect to the horizontal surface of less than 20 degrees.

[0161] Note 5. In the organic light-emitting diode display device according to Note 1, the current density difference between the main light-emitting region and the auxiliary light-emitting region is 0.0001 A / cm². 2 up to 0.05A / cm 2 Within the range.

[0162] Note 6. The organic light-emitting diode display device according to Note 1, wherein the second emission spectrum assists and compensates for the first emission spectrum.

[0163] Note 7. The organic light-emitting diode display device according to Note 1, wherein the slope of the side surface portion increases from the bottom surface portion to the top surface portion.

[0164] Note 8. The organic light-emitting diode display device according to Note 7, wherein the thickness of the light-emitting layer decreases as the slope increases.

[0165] Note 9. The organic light-emitting diode display device according to Note 1, wherein the thickness of the light-emitting layer corresponding to the first protrusion is less than the thickness of the light-emitting layer corresponding to the first recess.

[0166] Note 10. The organic light-emitting diode display device according to Note 1, wherein the first emission spectrum has peaks corresponding to red light, green light and blue light, and the second emission spectrum has at least one peak corresponding to at least one of the red light, the green light and the blue light.

[0167] Note 11. The organic light-emitting diode display device according to Note 10, wherein the second emission spectrum has two peaks corresponding to the red light and the blue light.

[0168] Note 12. The organic light-emitting diode display device according to Note 10, wherein the second emission spectrum has three peaks corresponding to the red light, the green light and the blue light.

[0169] Note 13. The organic light-emitting diode display device according to Note 10, wherein the second emission spectrum has a peak corresponding to the blue light.

[0170] Note 14. The organic light-emitting diode display device according to Note 1, wherein the thickness of the light-emitting layer corresponding to the side surface portion is less than the thickness of the light-emitting layer corresponding to the first recess and the top surface portion.

[0171] Note 15. A display device, comprising:

[0172] A substrate having light-emitting and non-light-emitting regions;

[0173] An outer coating above the substrate, the outer coating comprising a first recess and a first protrusion;

[0174] A first electrode above the outer coating, the first electrode including a second recess and a second protrusion;

[0175] A light-emitting layer above the first electrode, the light-emitting layer including a third concave portion and a third convex portion; and

[0176] The second electrode above the light-emitting layer includes a fourth recess and a fourth protrusion. The first, second, third, and fourth recesses are aligned with each other, and the first, second, third, and fourth protrusions are aligned with each other. The first, second, third, and fourth protrusions are located in a first light-emitting region with a first light-emitting spectrum, and the first, second, third, and fourth recesses are located in a second light-emitting region with a second light-emitting spectrum.

[0177] Note 16. The display device according to Note 15, wherein the first emission spectrum includes peaks corresponding to wavelengths of red, green and blue light, and the second emission spectrum includes at least one peak corresponding to a wavelength of at least one of the red, green or blue light.

[0178] Note 17. The display device according to Note 15, wherein each of the second recess, the third recess and the fourth recess has a first thickness, and each of the second convex portion, the third convex portion and the fourth convex portion has a second thickness less than the first thickness.

[0179] Note 18. The display device according to any one of Notes 1 and 15 further comprises:

[0180] A wavelength conversion layer interposed between the substrate and the outer coating; and

[0181] The embankment above the outer coating includes an opening that exposes the first electrode.

[0182] Note 19. The display device according to Note 18, wherein the edge portion of the wavelength conversion layer extends toward the non-light-emitting region beyond the edge portions of the first protrusion and the first recess.

[0183] The first protrusion and the first recess of the outer coating are formed in the opening.

[0184] The first protrusion and the first recess of the outer coating contact the edge portion of the embankment.

[0185] Wherein, the embankment covers the edge portions of the first protrusion and the first recess, or

[0186] The edge portions of the wavelength conversion layer, the edge portions of the protrusions and the concave portions, and the edge portions of the embankment overlap each other in the non-light-emitting area.

[0187] Note 20. The display device according to one of Notes 1 and 15, wherein the boundary portion of the light-emitting area and the non-light-emitting area overlaps the edge portions of the first convex portion and the first concave portion.

[0188] The recesses are arranged linearly along the first direction and staggered along the second direction, or

[0189] In the plan view, the first protrusion forms either a hexagonal shape or a honeycomb structure.

Claims

1. An organic light-emitting diode (OLED) display device, comprising: A substrate having light-emitting and non-light-emitting regions; An outer coating above the substrate includes a first protrusion and a first recess, the first protrusion including a top surface portion and a side surface portion between the first recess and the top surface portion; The first electrode above the outer coating; The light-emitting layer above the first electrode; and The second electrode above the light-emitting layer; The side surface portion is the main light-emitting region, the first recess is the auxiliary light-emitting region, and both the main light-emitting region and the auxiliary light-emitting region are effective light-emitting regions. Light emitted from the light-emitting layer corresponding to the side surface portion has a first emission spectrum, and light emitted from the light-emitting layer corresponding to the first recess has a second emission spectrum different from the first emission spectrum. The first emission spectrum has three peaks, and the second emission spectrum has one or two peaks.

2. The organic light-emitting diode display device according to claim 1, wherein the intensity of the first emission spectrum is greater than the intensity of the second emission spectrum.

3. The organic light-emitting diode display device according to claim 1, wherein the three peaks of the first emission spectrum correspond to the wavelengths of red light, green light, and blue light.

4. The organic light-emitting diode display device according to claim 1, wherein one peak of the second emission spectrum corresponds to the wavelength of blue light.

5. The organic light-emitting diode display device according to claim 1, wherein the two peaks of the second emission spectrum correspond to the wavelengths of red light and blue light.

6. An organic light-emitting diode display device, comprising: A substrate having light-emitting and non-light-emitting regions; An outer coating above the substrate includes a first protrusion and a first recess, the first protrusion including a top surface portion and a side surface portion between the first recess and the top surface portion; The first electrode above the outer coating; The light-emitting layer above the first electrode; and The second electrode above the light-emitting layer; The side surface portion is the main light-emitting region, and the first recess is the auxiliary light-emitting region. Both the main light-emitting region and the auxiliary light-emitting region are effective light-emitting regions. Light emitted from the light-emitting layer corresponding to the side surface portion has a first emission spectrum, and light emitted from the light-emitting layer corresponding to the first recess has a second emission spectrum different from the first emission spectrum. The first emission spectrum has three peaks corresponding to the wavelengths of red, green, and blue light, and the second emission spectrum has three peaks corresponding to the wavelengths of the red, green, and blue light. The peak of the second emission spectrum corresponding to the wavelength of the red light is greater than the peak of the second emission spectrum corresponding to the wavelength of the green light, and less than the peak of the second emission spectrum corresponding to the wavelength of the blue light.

7. The organic light-emitting diode display device according to claim 1, wherein the light emitted from the light-emitting layer corresponding to the top surface portion also has the second emission spectrum.

8. The organic light-emitting diode display device of claim 7, wherein the side surface portion has an angle in the range of 20 degrees to 60 degrees relative to the horizontal surface, and the first recess and the top surface portion have an angle of less than 20 degrees relative to the horizontal surface.

9. The organic light-emitting diode display device according to claim 8, wherein the side surface portion, the first recess, and the top surface portion are arc-shaped, and the tangent of the side surface portion has an angle in the range of 20 degrees to 60 degrees relative to the horizontal surface, and the tangent of the first recess and the tangent of the top surface portion have an angle of less than 20 degrees relative to the horizontal surface.

10. The organic light-emitting diode display device according to claim 1, wherein the current density difference of the light-emitting layer between the side surface portion and the first recess is 0.0001 A / cm². 2 Up to 0.05 A / cm 2 Within the range.

11. An organic light-emitting diode display device, comprising: A substrate having light-emitting and non-light-emitting regions; An outer coating above the substrate, the outer coating comprising a first recess and a first protrusion; A first electrode above the outer coating, the first electrode including a second recess and a second protrusion; A light-emitting layer above the first electrode, the light-emitting layer including a third concave portion and a third convex portion; and The second electrode above the light-emitting layer includes a fourth recess and a fourth protrusion. The first, second, third, and fourth recesses are aligned with each other, and the first, second, third, and fourth convex portions are aligned with each other. The first protrusion includes a top surface portion and a side surface portion between the first recess and the top surface portion. The side surface portion is the main light-emitting region, the first recess is the auxiliary light-emitting region, and both the main light-emitting region and the auxiliary light-emitting region are effective light-emitting regions. Light emitted from the light-emitting layer corresponding to the side surface portion has a first emission spectrum, and light emitted from the light-emitting layer corresponding to the first recess has a second emission spectrum different from the first emission spectrum. The first emission spectrum has three peaks, and the second emission spectrum has one or two peaks.

12. The organic light-emitting diode display device of claim 11, wherein the first emission spectrum includes peaks corresponding to wavelengths of red light, green light, and blue light, and the second emission spectrum includes at least one peak corresponding to wavelength of at least one of the red light, the green light, or the blue light.

13. The organic light-emitting diode display device according to claim 11, further comprising: A wavelength conversion layer inserted between the substrate and the outer coating; as well as The embankment above the outer coating includes an opening that exposes the first electrode.

14. The organic light-emitting diode display device of claim 13, wherein the edge portion of the wavelength conversion layer extends toward the non-light-emitting region beyond the edge portions of the first protrusion and the first recess. The first protrusion and the first recess of the outer coating are formed in the opening. The first protrusion and the first recess of the outer coating contact the edge portion of the embankment. The embankment covers the edge portions of the first protrusion and the first recess, or The edge portions of the wavelength conversion layer, the edge portions of the protrusion and the first concave portion, and the edge portions of the embankment overlap each other in the non-light-emitting area.

15. The organic light-emitting diode display device according to claim 11, wherein the boundary portion of the light-emitting region and the non-light-emitting region overlaps the edge portions of the first convex portion and the first concave portion. Wherein the first recess is arranged linearly along the first direction and staggered along the second direction, or The first protrusion in the plan view forms either a hexagonal shape or a honeycomb structure.

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