Light-emitting display device

Abstract

A light emitting display device is disclosed. One aspect of the present disclosure is directed to providing a light-emitting display device in which nanoparticles are provided at a lower end of an anode.

Description

[0001] Cross - reference to related applications

[0002] This application claims the benefit of Korean Patent Application No. 10 - 2023 - 0194569, filed on December 28, 2023, which is hereby incorporated by reference in its entirety as if fully set forth herein. Technical field

[0003] The present disclosure relates to a light - emitting display device. Background art

[0004] A light - emitting display device is installed on or disposed in an electronic product to display an image, such as a television, a monitor, a laptop computer, a smart phone, a tablet computer, an electronic tablet, a wearable device, a watch phone, a portable information device, a navigation device, or a vehicle control display device. Pixels are provided in a light - emitting display panel configuring the light - emitting display device, and a light - emitting device is provided in each pixel.

[0005] Light generated by the light - emitting device can be output to the outside through the cathode of the light - emitting device, but can also be transmitted in the direction of the anode of the light - emitting device.

[0006] Therefore, the brightness of the light output from the light - emitting device can be reduced.

[0007] The background art described above is part of the present disclosure for designing the present disclosure or technical information obtained through the process of designing the present disclosure, but cannot be regarded as known art publicly available to the public before the present disclosure is made. Summary of the invention

[0008] Accordingly, the present disclosure aims to provide a light - emitting display device that substantially eliminates one or more problems caused by the limitations and disadvantages of the related art.

[0009] One aspect of the present disclosure aims to provide a light - emitting display device having nanoparticles disposed at a lower end of an anode.

[0010] Additional advantages and features of the present disclosure will be partly described in the following description, and partly will become apparent to those of ordinary skill in the art after reviewing the following, or can be learned from the practice of the present disclosure. The objectives and other advantages of the present disclosure can be realized and obtained by the structures particularly pointed out in the written description and the drawings.

[0011] To achieve these and other advantages and in accordance with the purposes of the present disclosure, as embodied and broadly described herein, there is provided a light-emitting display device including: a substrate; a planarization layer configured to cover a pixel driving circuit layer disposed on the substrate; an insulating layer configured to be disposed on the planarization layer; a nanoparticle layer configured to be disposed in the insulating layer; and a first anode, a second anode, and a third anode configured to be disposed on the insulating layer, wherein the nanoparticle layer is disposed at a lower end of at least one of the first anode, the second anode, and the third anode.

[0012] It should be understood that both the foregoing general description and the following detailed description of the present disclosure are exemplary and explanatory and are intended to provide further explanation of the claimed present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The drawings are included to provide a further understanding of the present disclosure and are incorporated in and constitute a part of this application. The drawings illustrate embodiments of the present disclosure and, together with the description, are used to explain the principles of the present disclosure. In the drawings:

[0014] Figure 1 is an exemplary diagram showing the configuration of a light-emitting display device according to an embodiment of the present disclosure;

[0015] Figure 2 is an exemplary diagram showing the structure of a pixel applied to a light-emitting display device according to an embodiment of the present disclosure;

[0016] Figure 3 is an exemplary diagram showing the structure of a control driver applied to a light-emitting display device according to an embodiment of the present disclosure;

[0017] Figure 4 is an exemplary diagram showing the structure of a gate driver applied to a light-emitting display device according to an embodiment of the present disclosure;

[0018] Figure 5 is an exemplary diagram showing the structure of a data driver applied to a light-emitting display device according to an embodiment of the present disclosure;

[0019] Figure 6 is an exemplary diagram showing the amount of reflection according to the amount of nanoparticles applied to a light-emitting display device according to an embodiment of the present disclosure;

[0020] Figure 7 and Figure 8 is an exemplary diagram showing a cross-section of three pixels applied to a light-emitting display device according to an embodiment of the present disclosure;

[0021] Figures 9 to 12 is another exemplary cross-sectional view showing three pixels of a light-emitting display device applied to an embodiment according to the present disclosure;

[0022] Figure 13 is an exemplary graph showing the relationship between the position of a green nanoparticle layer and the reflectance of a light-emitting display device applied to an embodiment according to the present disclosure; and

[0023] Figure 14 is an exemplary graph showing the relationship between the position of a red nanoparticle layer and the reflectance of a light-emitting display device applied to an embodiment according to the present disclosure. Detailed Embodiments

[0024] Now, reference will be made in detail to exemplary embodiments of the present disclosure, which are illustrated in the accompanying drawings. Wherever possible, the same reference numerals will be used throughout the drawings to refer to the same or like parts.

[0025] Advantages and features of the present disclosure and methods for realizing them will be clarified by the embodiments described below with reference to the accompanying drawings. However, the present disclosure may be implemented in different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that the present disclosure will be thorough and complete, and will fully convey the scope of the present disclosure to those skilled in the art.

[0026] The shapes, sizes, ratios, angles, and numbers disclosed in the drawings for describing the embodiments of the present disclosure are merely examples, and thus the present disclosure is not limited to the details shown. Like reference numerals always refer to like elements. In the following description, when a detailed description of a related known function or configuration is determined to unnecessarily obscure the gist of the present disclosure, the detailed description will be omitted. When using "comprising", "having", and "including" described in the present disclosure, another part may be added unless "only" is used. A term in the singular form may include the plural form unless otherwise stated.

[0027] When explaining an element, although the error or tolerance range is not explicitly described, the element is construed as including such an error or tolerance range.

[0028] When describing a positional relationship, for example, when the positional relationship between two parts is described as, for example, "on...", "above...", "under...", and "next to...", one or more other parts may be provided between the two parts unless a more restrictive term such as "only" or "directly" is used.

[0029] When describing temporal relationships, for example, when a temporal order is described as, for example, "after", "subsequently", "next", and "before", discontinuous cases may be included unless more restrictive terms such as "exactly", "immediately", or "directly" are used.

[0030] It will be understood that although terms such as "first", "second", etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from other elements. For example, without departing from the scope of the present disclosure, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element.

[0031] When describing elements of the present disclosure, terms such as "first", "second", "A", "B", "(a)", "(b)", etc. may be used. These terms are intended to distinguish the corresponding elements from other elements, and the basis, order, or number of the corresponding elements should not be limited by these terms. The expression that an element is "connected", "coupled", or "adhered" to another element or layer means that the element or layer can not only be directly connected or adhered to another element or layer, but also be indirectly connected or adhered to another element or layer, where one or more intermediate elements or layers are "disposed" or "inserted" between the element or layer.

[0032] The term "at least one" should be understood to include any and all combinations of one or more of the associated listed items. For example, the meaning of "at least one of the first item, the second item, and the third item" represents all combinations of two or more of the first item, the second item, and the third item, as well as the first item, the second item, or the third item.

[0033] As can be fully understood by those skilled in the art, the features of the various embodiments of the present disclosure can be partially or wholly coupled or combined with each other, and can interoperate with each other in various ways and be technically driven. The embodiments of the present disclosure can be executed independently of each other, or can be executed together in a mutually dependent relationship.

[0034] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.

[0035] Figure 1 is an exemplary diagram showing the configuration of a light-emitting display device according to an embodiment of the present disclosure, Figure 2 is an exemplary diagram showing the structure of a pixel applied to a light-emitting display device according to an embodiment of the present disclosure, Figure 3 is an exemplary diagram showing the structure of a control driver applied to a light-emitting display device according to an embodiment of the present disclosure, Figure 4It is an exemplary diagram showing the structure of a gate driver applied to a light-emitting display device according to an embodiment of the present disclosure. Figure 5 It is an exemplary diagram showing the structure of a data driver applied to a light-emitting display device according to an embodiment of the present disclosure.

[0036] The light-emitting display device according to an embodiment of the present disclosure can be used in various electronic devices. The electronic device can be, for example, a television, a monitor, etc.

[0037] As Figure 1 shown, the light-emitting display device according to an embodiment of the present disclosure may include: a light-emitting display panel 100 including a display area DA for displaying an image and a non-display area NDA provided outside the display area DA; a gate driver 200 that provides gate signals GS to a plurality of gate lines GL1 to GLg provided in the display area DA of the display panel 100; a data driver 300 that provides data voltages Vdata to a plurality of data lines DL1 to DLd provided in the display area DA of the display panel 100; a control driver 400 that controls the driving of the gate driver 200 and the data driver 300; and a power supply unit 500 that supplies power to the control driver 400, the gate driver 200, the data driver 300, and the light-emitting display panel 100.

[0038] First, the light-emitting display panel 100 may include a display area DA and a non-display area NDA. Gate lines GL1 to GLg, data lines DL1 to DLd, and pixels P may be provided in the display area DA. Therefore, an image can be displayed in the display area DA. Here, g and d are natural numbers. The non-display area NDA may surround the outer periphery of the display area DA.

[0039] As Figure 2 shown, the pixel P included in the light-emitting display panel 100 may include: a pixel driving circuit PDC including a switching transistor Tsw1, a storage capacitor Cst, a driving transistor Tdr, and a sensing transistor Tsw2; and a light-emitting device ED connected to the pixel driving circuit PDC.

[0040] The first terminal of the driving transistor Tdr may be connected to a first voltage supply line through which a first voltage EVDD is provided, and the second terminal of the driving transistor Tdr may be connected to the light-emitting device ED.

[0041] The first terminal of the switching transistor Tsw1 may be connected to the data line DL, the second terminal of the switching transistor Tsw1 may be connected to the gate of the driving transistor Tdr, and the gate of the switching transistor Tsw1 may be connected to the gate line GL.

[0042] A data voltage Vdata can be provided from a data driver 300 through a data line DL. A gate signal GS can be provided from a gate driver 200 through a gate line GL. The gate signal GS can include a gate pulse GP for turning on a switching transistor Tsw1 and a gate-off signal for turning off the switching transistor Tsw1.

[0043] A sensing transistor Tsw2 can be provided to measure a threshold voltage of a driving transistor Tdr or a mobility of charges (e.g., electrons), or to provide a reference voltage Vref to a pixel driving circuit PDC. A first terminal of the sensing transistor Tsw2 can be connected to a second terminal of the driving transistor Tdr and a light-emitting device ED, a second terminal of the sensing transistor Tsw2 can be connected to a sensing line SL through which the reference voltage Vref is provided, and a gate of the sensing transistor Tsw2 can be connected to a sensing control line SCL through which a sensing control signal SCS is provided.

[0044] The sensing line SL can be connected to the data driver 300 and can be connected to a power supply unit 500 through the data driver 300. For example, the reference voltage Vref provided from the power supply unit 500 can be provided to the pixel through the sensing line SL, a sensing signal transmitted from the pixel P can be converted into a digital sensing signal in the data driver 300, and the digital sensing signal can be transmitted to a control driver 400.

[0045] The light-emitting device ED can include: a first electrode provided with a first voltage EVDD through the driving transistor Tdr; a second electrode connected to a second voltage supply line PLB through which a second voltage is provided; and a light-emitting layer disposed between the first electrode and the second electrode. The first electrode can be an anode, and the second electrode can be a cathode.

[0046] The structure of the pixel P applied to a light-emitting display device according to an embodiment of the present disclosure is not limited to Figure 2 the structure shown. Therefore, the structure of the pixel P can be changed into various shapes.

[0047] The control driver 400 can realign input image data Ri, Gi, and Bi transmitted from an external system by using a timing synchronization signal TSS transmitted from the external system 600, and can generate a data control signal DCS to be provided to the data driver 300 and a gate control signal GCS to be provided to the gate driver 200.

[0048] For this purpose, as Figure 3As shown, the control driver 400 may include: a data aligner 430 that realigns the input image data Ri, Gi, and Bi to generate image data Data; a control signal generator 420 that generates a gate control signal GCS and a data control signal DCS by using a timing synchronization signal TSS; an input unit 410 that sends the timing synchronization signal TSS sent from an external system 600 to the control signal generator 420, and sends the input image data Ri, Gi, and Bi sent from the external system 600 to the data aligner 430; and an output unit 440 that provides the image data Data generated by the data aligner 430 and the data control signal DCS generated by the control signal generator 420 to the data driver 300, and provides the gate control signal GCS generated by the control signal generator 420 to the gate driver 200.

[0049] The control signal generator 420 may generate a power control signal provided to the power supply unit 500.

[0050] The control driver 400 may further include a storage unit for storing various information. The storage unit 450 may be included in the control driver 400 as Figure 3 shown, but may also be separated from the control driver 400 and independently provided.

[0051] The external system 600 may perform functions of driving the control driver 400 and the electronic device.

[0052] For example, when the electronic device is a television (TV), the external system 600 may receive various sound information, image information, and letter information through a communication network, and may send the received image information to the control driver 400. For example, the external system 600 may convert the image information into input image data Ri, Gi, and Bi, and send the input image data Ri, Gi, and Bi to the control driver 400.

[0053] The power supply unit 500 may generate various powers and provide the generated powers to the control driver 400, the gate driver 200, the data driver 300, and the light-emitting display panel 100.

[0054] The gate driver 200 may be directly embedded in the non-display area NDA by using the gate-in-panel (GIP) type, or the gate driver 200 may be provided in the display area DA where the light-emitting device ED is provided, or the gate driver 200 may be provided on a chip-on-film mounted in the non-display area NDA.

[0055] The gate driver 200 may provide gate pulses GP1 to GPg to the gate lines GL1 to GLg.

[0056] When the gate pulse GP generated by the gate driver 200 is provided to the gate of the switching transistor Tsw1 included in the pixel P, the switching transistor Tsw1 can be turned on. When the switching transistor Tsw1 is turned on, the data voltage Vdata provided through the data line DL can be provided to the pixel P.

[0057] When the gate-off signal generated by the gate driver 200 is provided to the switching transistor Tsw1, the switching transistor Tsw1 can be turned off. When the switching transistor Tsw1 is turned off, the data voltage is no longer provided to the pixel P.

[0058] The gate signal GS provided to the gate line GL can include the gate pulse GP and the gate-off signal.

[0059] To provide the gate pulses GP1 to GPg to the gate lines GL1 to GLg, as Figure 4 shown, the gate driver 200 can include stages ST1 to STg connected to the gate lines GL1 to GLg.

[0060] Each of the stages ST1 to STg can be connected to one gate line GL, but can also be connected to at least two gate lines GL.

[0061] To generate the gate pulses GP1 to GPg, the gate start signal VST and at least one gate clock GCLK generated by the control signal generator 420 can be transmitted to the gate driver 200. For example, the gate start signal VST and at least one gate clock GCLK can be included in the gate control signal GCS.

[0062] One of the stages ST1 to STg can be driven by the gate start signal VST to output the gate pulse GP to the gate line GL. The gate pulse GP can be generated by the gate clock GCLK.

[0063] At least one signal in the signals output from the stage ST that outputs the gate pulse can be provided to another stage ST to drive the other stage ST. Therefore, a gate pulse can be output in the other stage ST.

[0064] For example, the stages ST can be sequentially driven to sequentially provide the gate pulse GP to the gate line GL.

[0065] The data driver 300 can provide the data voltage Vdata to the data lines DL1 to DLd.

[0066] For this purpose, as Figure 5As shown, the data driver 300 may include: a shift register 310 that outputs a sampling signal; a latch 320 that latches the image data Data received from the control driver 400; a digital-to-analog converter 330 that converts the image data Data sent from the latch 320 into a data voltage Vdata and outputs the data voltage Vdata; and an output buffer 340 that outputs the data voltage sent from the digital-to-analog converter 330 to the data line DL based on a source output enable signal SOE.

[0067] The shift register 310 may output a sampling signal by using a data control signal DCS received from the control signal generator 420. For example, the data control signal DCS sent to the shift register 310 may include a source start pulse SSP and a source shift clock signal SSC.

[0068] The latch 320 may latch the image data Data sequentially received from the control driver 400, and then output the image data Data to the digital-to-analog converter 330 simultaneously based on the sampling signal.

[0069] The digital-to-analog converter 330 may convert the image data Data sent from the latch 320 into a data voltage Vdata, and output the data voltage Vdata.

[0070] The output buffer 340 may output the data voltage Vdata sent from the digital-to-analog converter 330 to the data lines DL1 to DLd of the light-emitting display panel 100 simultaneously based on a source output enable signal SOE sent from the control signal generator 420.

[0071] To this end, the output buffer 340 may include: a buffer 341 that stores the data voltage Vdata sent from the digital-to-analog converter 330; and a switch 342 that outputs the data voltage Vdata stored in the buffer 341 to the data line DL based on the source output enable signal SOE.

[0072] For example, when the switch 342 is turned on based on the source output enable signal SOE simultaneously provided to the switch 342, the data voltage Vdata stored in the buffer 341 may be provided to the data lines DL1 to DLd through the switch 342.

[0073] The data voltage Vdata provided to the data lines DL1 to DLd may be provided to the pixel P, and the pixel P is connected to a gate line GL provided with a gate pulse GP.

[0074] Figure 6 It is an example diagram showing the reflection amount according to the amount of nanoparticles, and the nanoparticles are applied to a light-emitting display device according to an embodiment of the present disclosure.

[0075] A light-emitting display device according to an embodiment of the present disclosure uses metal nanoparticles (hereinafter simply referred to as nanoparticles). Metals such as silver (Ag) and gold (Au) can be used as the nanoparticles.

[0076] In particular, a light-emitting display device according to an embodiment of the present disclosure utilizes a plasmon phenomenon generated from the nanoparticles.

[0077] The plasmon phenomenon refers to a phenomenon in which light reaching the surface of the nanoparticles is amplified and reflected on the surface of the nanoparticles.

[0078] Since the resonance wavelength band can be changed according to the diameter of the nanoparticles, the diameter of the nanoparticles can be changed according to the color of the pixel in which the nanoparticles are provided.

[0079] For example, the diameter of the nanoparticles applied to the red pixels can be 50 nm to 80 nm, the diameter of the nanoparticles applied to the green pixels can be 10 nm to 20 nm, and the diameter of the nanoparticles applied to the blue pixels can be 5 nm to 10 nm.

[0080] According to various tests and simulations, the amount of reflection can be controlled according to the amount of nanoparticles applied to the pixels.

[0081] For example, as Figure 6 shown, when gold (Au) is used as the nanoparticles and the nanoparticles are included in the liquid to be injected into the pixels, the amount of reflection when the amount of the nanoparticles in the liquid is 15% is lower than the amount of reflection when the amount of the nanoparticles in the liquid is 5%.

[0082] This means that the amount of reflection of the nanoparticles is not proportional to the amount of the nanoparticles. In other words, simply adding more nanoparticles does not necessarily increase the amount of reflection.

[0083] Therefore, the amount of nanoparticles provided in the light-emitting display panel can be set differently through various tests and simulations.

[0084] To provide additional description, the resonance wavelength band of the nanoparticles can be determined by the diameter of the nanoparticles, and the amount of reflection of the nanoparticles can be determined by the amount of the nanoparticles in the liquid containing the nanoparticles.

[0085] Figure 7 and Figure 8 are example diagrams showing cross-sections of three pixels applied to a light-emitting display device according to an embodiment of the present disclosure. In the following description, details that are the same as or similar to the details described with reference to Figures 1 to 6 are omitted or briefly described.

[0086] AsFigure 7 and Figure 8 As shown in Figure 8 , the light-emitting display panel 100 including the substrate 101 provided with a semiconductor can be applied to a light-emitting display device according to an embodiment of the present disclosure.

[0087] The small light-emitting display panel can be applied to virtual reality (VR) devices and augmented reality (AR) devices. For example, the light-emitting display panel 100 including the substrate 101 made of a semiconductor can be applied.

[0088] The light-emitting device ED provided in the light-emitting display panel 100 including the substrate 101 made of a semiconductor can be referred to as an organic light-emitting diode on silicon (OLEDoS).

[0089] The size of the light-emitting display panel applied to virtual reality (VR) devices and augmented reality (AR) devices is much smaller than the size of the light-emitting display panel applied to electronic devices such as televisions, monitors, and smartphones.

[0090] Therefore, the substrate 101 made of a semiconductor can be used to manufacture a light-emitting display panel applied to virtual reality (VR) devices and augmented reality (AR) devices, which is beneficial for miniaturization.

[0091] For example, the substrate 101 made of a semiconductor can be a silicon substrate formed by a complementary metal oxide semiconductor (CMO) process, or a germanium substrate.

[0092] In a light-emitting display device using the substrate 101 made of a semiconductor, a reflective electrode 105 can be provided at the lower end of the anode AN to improve the extraction efficiency of red, green, and blue light. For example, the reflective electrode 105 can be provided under the anode AN within a sub-pixel. In addition, depending on the color, the distance between the reflective electrode 105 and the anode AN can be adjusted differently.

[0093] In this case, by adjusting the thickness of the insulator between the anode AN and the reflective electrode 105, the light extraction efficiency in each pixel B, G, and R can be improved.

[0094] In particular, in a light-emitting display device according to an embodiment of the present disclosure, a nanoparticle layer 106 is provided between the reflective electrode 105 and the anode AN to improve the extraction efficiency of red, green, and blue light and increase the amount of light reflected from the reflective electrode 105.

[0095] The light generated by the light-emitting device ED and transmitted toward the reflective electrode 105 can be reflected by the reflective electrode 105 and the nanoparticle layer 106, and output to the outside through the cathode CA of the light-emitting device ED. Therefore, the brightness of the light output from the light-emitting device ED can be improved.

[0096] The above functions can be performed not only in a light-emitting display device using a substrate 101 made of semiconductor, but also in a light-emitting display device using a glass substrate, a plastic substrate, or a flexible substrate.

[0097] Therefore, a light-emitting display device according to an embodiment of the present disclosure can be configured using a substrate 101 made of semiconductor, or can be configured using a glass substrate, a plastic substrate, or a flexible substrate.

[0098] However, hereinafter, for convenience of description, a light-emitting display device using a substrate 101 made of semiconductor will be described as an example of the present disclosure.

[0099] A light-emitting display panel 100 applied to a light-emitting display device according to an embodiment of the present disclosure may include a substrate 101, a pixel driving circuit layer PDCL disposed on the substrate 101, a planarization layer 103 covering the pixel driving circuit layer PDCL, an insulating layer 104 disposed on the planarization layer 103, a first anode RAN, a second anode GAN, and a third anode BAN disposed on the insulating layer 104, a bank BK disposed between two anodes, a light-emitting layer EL covering the first anode RAN, the second anode GAN, the third anode BAN, and the bank, a cathode CA covering the light-emitting layer EL, and a packaging layer 107 covering the cathode CA.

[0100] The first anode RAN may be an anode in a pixel that outputs one color among red, green, and blue. The second anode GAN may be an anode in a pixel that outputs one color among red, green, and blue, or may be an anode in a pixel that outputs a color different from that of the first anode RAN and the third anode BAN. The third anode BAN may be an anode in a pixel that outputs one color among red, green, and blue, or may be an anode in a pixel that outputs a color different from that of the first anode RNA and the second anode GAN.

[0101] For example, the first anode RAN may be a red anode RAN in a red pixel R that outputs red light, the second anode GAN may be a green anode GAN in a green pixel G that outputs green light, and the third anode BAN may be a blue anode BAN in a blue pixel B that outputs blue light.

[0102] However, each of the first anode RAN, the second anode GAN, and the third anode BAN is not limited to an anode for generating light of a specific color, but may be an anode for generating any one of various colors.

[0103] Hereinafter, for convenience of description, the first anode, the second anode, and the third anode may be described using the reference numerals of the red anode RAN, the green anode GAN, and the blue anode BAN. In particular, the red anode RAN, the green anode GAN, and the blue anode BAN are used to describe the light-emitting display device according to an embodiment of the present disclosure.

[0104] However, in the following description, when it is not necessary to distinguish the red anode RAN or the first anode RAN, the green anode GAN or the second anode GAN, and the blue anode BAN or the third anode BAN from each other, the red anode RAN or the first anode RAN, the green anode GAN or the second anode BAN, and the blue anode BAN or the third anode BAN may be represented as the anode AN.

[0105] First, as described above, the substrate 101 may be made of a semiconductor and may be, for example, a silicon substrate or a germanium substrate.

[0106] Next, a pixel driving circuit layer PDCL may be provided on the substrate 101. The pixel driving circuit layer PDCL may include the transistors Tsw1, Tsw2, and Tsdr and the capacitor Cst described with reference to Figure 2 description.

[0107] That is, the transistors Tsw1, Tsw2, Tdr, and the capacitor Cst described with reference to Figure 2 description may be provided on the substrate 101.

[0108] For example, in Figure 7 , a light-emitting display panel 100 having only the driving transistor Tdr in the pixel driving circuit layer PDCL is shown, but various transistors and capacitors may also be provided in the pixel driving circuit layer PDCL in addition to the driving transistor Tdr.

[0109] The pixel driving circuit layer PDCL may include at least one electrode layer and at least one insulating layer.

[0110] For example, as Figure 7 shown, when the driving transistor Tdr includes a first electrode E1, a second electrode E2, an active layer ACT, a gate insulating layer GI, and a gate electrode Gate, the pixel driving circuit layer PDCL may include a first electrode layer provided with the first electrode E1 and the second electrode E2, a second electrode layer provided with the gate electrode Gate, a first insulating layer provided with the gate insulating layer GI, and a second insulating layer provided with a passivation layer 102 covering the driving transistor Tdr.

[0111] The first electrode E1 and the second electrode E2 can be formed by injecting impurities into the substrate 101. For example, the first electrode E1 and the second electrode E2 can be formed by injecting N-type impurities such as phosphorus (P) or arsenic (As) into the substrate 101, or by injecting P-type impurities such as boron (B) into the substrate 101.

[0112] The active layer ACT refers to the semiconductor disposed between the first electrode E1 and the second electrode E2. Therefore, a part of the substrate 101 can be used as the active layer ACT.

[0113] The gate insulating layer GI can be formed of silicon oxide.

[0114] The gate electrode Gate can be a doped semiconductor material or a metal material such as aluminum and tungsten.

[0115] The passivation layer 102 can cover the transistors disposed in the pixel driving circuit layer PDCL to protect the transistors. In this case, various metal wires connected to the pixel driving circuit layer PDCL can be disposed on the upper end of the passivation layer 102 or inside the passivation layer 102. To this end, the passivation layer 102 can be formed of at least one layer.

[0116] Next, the planarization layer 103 can perform the function of planarizing the upper end of the pixel driving circuit layer PDCL. The planarization layer 103 can be formed of at least one of various types of organic layers, can be formed of at least one of various types of inorganic layers, or can be formed of at least one organic layer and at least one inorganic layer.

[0117] Next, the insulating layer 104 can be disposed on the upper end of the planarization layer 103.

[0118] The upper end of the planarization layer 103 and the insulating layer 104 can be provided with a first reflective electrode (or red reflective electrode) 105R corresponding to the first anode (or red anode) RAN, a second reflective electrode (or green reflective electrode) 105G corresponding to the second anode (or green anode) GAN, and a third reflective electrode (or blue reflective electrode) 105B corresponding to the third anode (or blue anode) BAN.

[0119] In addition, the nanoparticle layer 106 can be disposed in the insulating layer 104.

[0120] The nanoparticle layer 106 can be disposed at the lower end of at least one of the red anode RAN, the green anode GAN, and the blue anode BAN.

[0121] Hereinafter, for convenience of description, the reference numerals of the red reflective electrode 105R, the green reflective electrode 105G, and the blue reflective electrode 105B may be used to describe the first reflective electrode, the second reflective electrode, and the third reflective electrode. In particular, the red reflective electrode 105R, the green reflective electrode 105G, and the blue reflective electrode 105B are used to describe the light-emitting display device according to an embodiment of the present disclosure.

[0122] However, in the following description, when it is not necessary to distinguish the first reflective electrode (or red reflective electrode) 105R, the second reflective electrode (or green reflective electrode) 105G, and the third reflective electrode (or blue reflective electrode) 105B from each other, the first reflective electrode (or red reflective electrode) 105R, the second reflective electrode (or green reflective electrode) 105G, and the third reflective electrode (or blue reflective electrode) 105B may be represented as the reflective electrode 105.

[0123] Next, the blue anode BAN, the green anode GAN, and the red anode RAN may be disposed on the insulating layer 104 at regular intervals.

[0124] Next, the bank BK may be disposed between the two anodes AN.

[0125] The bank BK covers the end portions of the anode AN, and light may be output to the outside through the region of the anode AN that is not covered by the bank BK (hereinafter, simply referred to as the opening portion).

[0126] The bank BK may be formed of at least one of an organic material and an inorganic material.

[0127] Next, the anode AN and the bank BK are covered by the light-emitting layer EL.

[0128] As Figure 7 shown, the light-emitting layer EL may be continuously disposed between the anodes AN (for example, the light-emitting layer EL may continuously extend as a common layer across sub-pixels), or may be independently disposed like the anode AN.

[0129] Next, the light-emitting layer EL is covered by the cathode CA. For example, the cathode CA may continuously extend as a common layer across sub-pixels, but the embodiment is not limited thereto.

[0130] Finally, the encapsulation layer 107 may be disposed on the cathode CA. The encapsulation layer 107 may be formed of at least one layer (for example, multiple layers, such as an organic insulating layer between two inorganic insulating layers, etc.).

[0131] In addition, a color filter may also be disposed on the cathode CA. The color filter may be disposed on the encapsulation layer 107 or may be disposed inside the encapsulation layer 107.

[0132] Hereinafter, reference will be made to Figure 7 and Figure 8 to describe in detail the structures of the insulating layer 104, the reflective electrodes 105B, 105G, and 105R, and the nanoparticle layer 106.

[0133] First, in the light-emitting display device according to an embodiment of the present disclosure, as described above, the insulating layer 104 may be provided on the upper end of the planarization layer 103. The blue reflective electrode 105B, the green reflective electrode 105G, and the red reflective electrode 105R corresponding to the blue anode BAN, the green anode GAN, and the red anode RAN may be provided on the upper end of the planarization layer 103 and in the insulating layer 104. The nanoparticle layer 106 may be provided in the insulating layer 104.

[0134] For example, the red reflective electrode 105R is provided at the lower end of the red anode RAN, and the red reflective electrode 105R is provided on the upper end surface of the planarization layer 103. Therefore, the red anode RAN and the red reflective electrode 105R are separated by the insulating layer 104.

[0135] The green reflective electrode 105G is provided at the lower end of the green anode GAN, and the green reflective electrode 105G is provided in the insulating layer 104. In this case, the green anode GAN and the green reflective electrode 105G are separated by a part of the insulating layer 104.

[0136] The blue reflective electrode 105B may be provided at the lower end of the blue anode BAN, and the blue reflective electrode 105B may be provided on the upper end surface of the insulating layer 104. In this case, the blue anode BAN may be provided on the upper end surface of the blue reflective electrode 105B. For example, the blue reflective electrode 105B and the blue anode BAN may be sequentially provided on the upper end surface of the insulating layer 104.

[0137] In this case, the nanoparticle layer 106 may be provided at the lower end of at least one of the red anode RAN, the green anode GAN, and the blue anode BAN.

[0138] For example, the nanoparticle layer 106 may be provided between at least one of the following pairs: the red anode RAN and the red reflective electrode 105R, the green anode GAN and the green reflective electrode 105G, and the blue anode BAN and the blue reflective electrode 105B.

[0139] For example, in Figure 7 a light-emitting display panel 100 having a green nanoparticle layer 106G between the green anode GAN and the green reflective electrode 105G is shown, and in Figure 8A light-emitting display panel 100 is shown having a red nanoparticle layer 106R between a red anode RAN and a red reflective electrode 105R.

[0140] In the following description, the green nanoparticle layer is described using reference numeral 106G, and the red nanoparticle layer is described using reference numeral 106R. Further, when it is not necessary to distinguish between the green nanoparticle layer 106G and the red nanoparticle layer 106R, the green nanoparticle layer 106G and the red nanoparticle layer 106R may be represented as the nanoparticle layer 106.

[0141] The reflective electrode 105 may be disposed at the lower end of the anode AN to improve the extraction efficiency of blue light output from the blue pixel B, green light output from the green pixel G, and red light output from the red pixel R.

[0142] For example, through a microcavity structure between a blue anode BAN and a blue reflective electrode 105B, light output from a light-emitting device ED including the blue anode BAN may further include blue light compared to light of other colors. In this case, if the light output from the light-emitting device ED passes through a blue color filter, only the blue light can pass through the blue color filter and be output to the outside. Therefore, using the microcavity structure, more blue light can be output to the outside through the blue color filter.

[0143] Further, through a microcavity structure between a green anode GAN and a green reflective electrode 105G, more green light can be output to the outside through a green color filter.

[0144] Further, through a microcavity structure between a red anode RAN and a red reflective electrode 105R, more red light can be output to the outside through a red color filter.

[0145] To this end, the distance between the red anode RAN and the red reflective electrode 105R, the distance between the green anode GAN and the green reflective electrode 105G, and the distance between the blue anode BAN and the blue reflective electrode 105B may be set differently so as to amplify a color of a specific wavelength due to the microcavity effect.

[0146] For example, as Figure 7 and Figure 8 shown, the distance between the red anode RAN and the red reflective electrode 105R may be formed to be greater than the distance between the green anode GAN and the green reflective electrode 105G, and the blue anode BAN may be disposed on the upper surface of the blue reflective electrode 105B.

[0147] The distance between the red anode RAN and the red reflective electrode 105R and the distance between the green anode GAN and the green reflective electrode 105G can be set differently according to the size of the light-emitting display panel 100, the power level applied to the light-emitting device ED, and the size of the light-emitting device ED. Accordingly, the distance between the red anode RAN and the red reflective electrode 105R and the distance between the green anode GAN and the green reflective electrode 105G can be set differently through various tests and simulations.

[0148] In this case, according to various tests and simulations, when the blue anode BAN is disposed on the upper end surface of the blue reflective electrode 105B, the reflection efficiency of blue light is maximized. Accordingly, in the following description, as Figure 7 and Figure 8 shown, a light-emitting display panel in which the blue anode BAN is disposed on the upper end surface of the blue reflective electrode 105B will be described as an example of the light-emitting display panel 100 applied to a light-emitting display device according to an embodiment of the present disclosure.

[0149] The diameters of the nanoparticles included in the red nanoparticle layer 106R disposed at the lower end of the red anode RAN, the diameters of the nanoparticles included in the green nanoparticle layer 106G disposed at the lower end of the green anode GAN, and the diameters of the nanoparticles included in the blue nanoparticle layer 106B disposed at the lower end of the blue anode BAN can be different from each other. In other words, sub-pixels of different colors may include nanoparticles of different sizes in order to further amplify the light of a specific color of a given sub-pixel.

[0150] Metals such as silver (Ag) and gold (Au) can be used as the nanoparticles.

[0151] The light extraction efficiency of a light-emitting display device according to an embodiment of the present disclosure can be improved through the plasmonic phenomenon formed on the surface of the nanoparticles. For example, due to the plasmonic phenomenon, the reflectance of light incident on the surface of the nanoparticles can be increased on the surface of the nanoparticles.

[0152] In this case, the resonance wavelength band can be changed according to the size of the nanoparticles.

[0153] Accordingly, the wavelength band of the light reflected from the surface of the nanoparticles can vary according to the size of the nanoparticles.

[0154] The diameters of the nanoparticles included in the red nanoparticle layer 105R, the diameters of the nanoparticles included in the green nanoparticle layer 105G, and the diameters of the nanoparticles included in the blue nanoparticle layer can be set differently through various tests and simulations.

[0155] For example, in order to increase the reflectivity of red light, the diameter of the nanoparticles can be from 50 nm to 80 nm; in order to increase the reflectivity of green light, the diameter of the nanoparticles can be from 10 nm to 20 nm; and in order to increase the reflectivity of blue light, the diameter of the nanoparticles can be from 5 nm to 10 nm.

[0156] Therefore, the red nanoparticle layer 105R disposed at the lower end of the red anode RAN may include nanoparticles each having a diameter of from 50 nm to 80 nm, the green nanoparticle layer 105G disposed at the lower end of the green anode GAN may include nanoparticles each having a diameter of from 10 nm to 20 nm, and the blue nanoparticle layer 105B disposed at the lower end of the blue anode BAN may include nanoparticles each having a diameter of from 5 nm to 10 nm.

[0157] However, as described above, the blue anode BAN may be disposed on the upper surface of the blue reflective electrode 105B.

[0158] In this case, if the blue nanoparticle layer is disposed on the upper surface of the blue reflective electrode 105B, a curvature may be formed on the surface of the blue anode BAN by the nanoparticles included in the blue nanoparticle layer. Thus, light may be refracted on the surface of the blue anode BAN, and thus the efficiency of light output to the outside may be reduced.

[0159] Therefore, the blue nanoparticle layer may not be disposed between the blue anode BAN and the blue reflective electrode 105B.

[0160] However, if the area of the blue anode BAN is large enough such that the curvature formed on the surface of the blue anode BAN can be ignored, or the efficiency of light due to the curvature is not significantly reduced, the blue nanoparticle layer may also be disposed between the blue anode BAN and the blue reflective electrode 105B.

[0161] Hereinafter, for ease of description, as Figure 7 and Figure 8 shown, a light-emitting display panel without a blue nanoparticle layer between the blue anode BAN and the blue reflective electrode 105B will be described as an example of the light-emitting display panel 100 applied to the light-emitting display device according to an embodiment of the present disclosure.

[0162] For example, the nanoparticle layer 106 can be formed by spraying a liquid containing nanoparticles by an inkjet method.

[0163] For example, when a liquid containing nanoparticles is sprayed onto the surface of the reflective electrode 105 by using an inkjet method, a nanoparticle layer 106 can be formed on the surface of the reflective electrode 105. In addition, when a liquid containing nanoparticles is sprayed onto the surface of the sub-insulating layer constituting the insulating layer 104 by using an inkjet method, a nanoparticle layer 106 can be formed on the surface of the sub-insulating layer.

[0164] Secondly, as described above, the light-emitting display device according to an embodiment of the present disclosure includes an insulating layer 104 provided on the planarization layer 103, a nanoparticle layer 106 provided in the insulating layer, and a red anode RAN, a green anode GAN, and a blue anode BAN provided on the insulating layer, and the nanoparticle layer 106 can be provided at the lower end of at least one of the red anode RAN, the green anode GAN, and the blue anode BAN.

[0165] In addition, a red reflective electrode 105R is provided at the lower end of the red anode RAN, a green reflective electrode 105G is provided at the lower end of the green anode GAN, and a blue reflective electrode 105B is provided at the lower end of the blue anode BAN. The nanoparticle layer 106 can be provided at at least one of the following positions: the position between the red anode RAN and the red reflective electrode 105R, the position between the green anode GAN and the green reflective electrode 105G, and the position between the blue anode BAN and the blue reflective electrode 105B.

[0166] In this case, the distance between the red anode RAN and the red reflective electrode 105R, the distance between the green anode GAN and the green reflective electrode 105G, and the distance between the blue anode BAN and the blue reflective electrode 105B can be different from each other.

[0167] For example, as Figure 7 and Figure 8 shown, the distance between the red anode RAN and the red reflective electrode 105R can be greater than the distance between the green anode GAN and the green reflective electrode 105G, and the blue anode BAN can be provided on the upper end surface of the blue reflective electrode 105B.

[0168] That is, there may be no gap between the blue anode BAN and the blue reflective electrode 105B. For example, the blue reflective electrode 105B can be in direct contact with the blue anode BAN, but the embodiment is not limited thereto.

[0169] In this case, the nanoparticle layer 106 can be disposed on the upper surface of at least one of the red reflective electrode 105R, the green reflective electrode 105G, and the blue reflective electrode 105B. For example, the blue nanoparticle layer 106 can be disposed between the blue reflective electrode 105B and the blue anode BAN and be in direct contact with both the blue reflective electrode 105B and the blue anode BAN, but the embodiments are not limited thereto.

[0170] For example, as Figure 7 shown, the green nanoparticle layer 106G can be disposed only on the green reflective electrode 105G.

[0171] That is, when it is determined that the reflectivity of the green reflective electrode 105G is less than the preset reflectivity range, the green nanoparticle layer 106G can be disposed on the green reflective electrode 105G.

[0172] The green nanoparticle layer 105G can include nanoparticles each having a diameter of 10 nm to 20 nm.

[0173] On the surface of the nanoparticles disposed in the green nanoparticle layer 106G, due to the plasma phenomenon, the reflectivity of light can be increased, and thus, the light extraction efficiency in the light-emitting device ED including the green anode GAN can be increased.

[0174] In this case, as Figure 7 shown, the insulating layer 104 can include a first auxiliary insulating layer 104a and a second auxiliary insulating layer 104b.

[0175] Each of the first auxiliary insulating layer 104a and the second auxiliary insulating layer 104b can be formed of at least one organic layer, can be formed of at least one inorganic layer, or can be formed of at least one organic layer and at least one inorganic layer.

[0176] In addition, the first auxiliary insulating layer 104a and the second auxiliary insulating layer 104b can be formed of the same material.

[0177] For example, each of the first auxiliary insulating layer 104a and the second auxiliary insulating layer 104b can be formed of silicon nitride (SiNx).

[0178] For example, as Figure 7 shown, the red reflective electrode 105R can be disposed on the planarization layer 103, and the planarization layer 103 and the red reflective electrode 105R can be covered by the first auxiliary insulating layer 104a.

[0179] The green reflective electrode 105G can be disposed on the first auxiliary insulating layer 104a, and the green nanoparticle layer 106G can be disposed on the green reflective electrode 105G.

[0180] The green nanoparticle layer 106G and the first auxiliary insulating layer 104a may be covered by the second auxiliary insulating layer 104b.

[0181] The blue reflective electrode 105B may be disposed on the second auxiliary insulating layer 104b, and the blue anode BAN may be disposed on the blue reflective electrode 105B.

[0182] The green anode GAN and the red anode RAN may be disposed on the second auxiliary insulating layer 104b.

[0183] In addition, as Figure 8 shown, the red nanoparticle layer 106R may be disposed only on the red reflective electrode 105R.

[0184] That is, when it is determined that the reflectivity of the red reflective electrode 105R is less than a preset reflectivity range, the red nanoparticle layer 106R may be disposed on the upper surface of the red reflective electrode 105R.

[0185] The red nanoparticle layer 105R may include nanoparticles each having a diameter of 50 nm to 80 nm.

[0186] On the surface of the nanoparticles disposed in the red nanoparticle layer 106R, due to the plasma phenomenon, the reflectivity of light may increase. Therefore, the light extraction efficiency of the light-emitting device including the red anode RAN may increase.

[0187] In this case, as Figure 8 shown, the red reflective electrode 105R may be disposed on the planarization layer 103, and the red nanoparticle layer 106R may be disposed on the red reflective electrode 105R.

[0188] The planarization layer 103 and the red nanoparticle layer 106R may be covered by the first auxiliary insulating layer 104a, the green reflective electrode 105G may be disposed on the first auxiliary insulating layer 104a, the green reflective electrode 105G and the first auxiliary insulating layer 104a may be covered by the second auxiliary insulating layer 104b, the blue reflective electrode 105B may be disposed on the second auxiliary insulating layer 104b, the blue anode BAN may be disposed on the blue reflective electrode 105B, and the green anode GAN and the red anode RAN may be disposed on the second auxiliary insulating layer 104b.

[0189] In addition, the nanoparticle layer 106 may be disposed on each of the red reflective electrode 105R and the green reflective electrode 105G.

[0190] That is, when it is determined that the reflectance of the red reflective electrode 105R and the reflectance of the green reflective electrode 105G are less than a preset reflectance range, a red nanoparticle layer 106R can be provided on the red reflective electrode 105R, and a green nanoparticle layer 106G can be provided on the green reflective electrode 105G.

[0191] The red nanoparticle layer 105R can include nanoparticles each having a diameter of 50 nm to 80 nm, and the green nanoparticle layer 105G can include nanoparticles each having a diameter of 10 nm to 20 nm.

[0192] On the surface of the nanoparticles provided in the red nanoparticle layer 106R, due to the plasmon phenomenon, the reflectance of light can be increased. Therefore, the light extraction efficiency of the light-emitting device including the red anode RAN can be increased.

[0193] In addition, on the surface of the nanoparticles provided in the green nanoparticle layer 106G, due to the plasmon phenomenon, the reflectance of light can be increased. Therefore, the light extraction efficiency of the light-emitting device including the green anode GAN can be increased.

[0194] In this case, the red reflective electrode 105R can be provided on the planarization layer 103, and the red nanoparticle layer 106R can be provided on the red reflective electrode 105R.

[0195] The planarization layer 103 and the red nanoparticle layer 106R can be covered by the first auxiliary insulating layer 104a. The green reflective electrode 105G can be provided on the first auxiliary insulating layer 104a, and the green nanoparticle layer 106G can be provided on the green reflective electrode 105G.

[0196] The green nanoparticle layer 106G and the first auxiliary insulating layer 104a can be covered by the second auxiliary insulating layer 104b. The blue reflective electrode 105B can be provided on the second auxiliary insulating layer 104b, the blue anode BAN can be provided on the blue reflective electrode 105B, and the green anode GAN and the red anode RAN can be provided on the second auxiliary insulating layer 104b.

[0197] Through the above structure, the light extraction efficiency of the light-emitting device ED including the red anode RAN can be improved, and the light extraction efficiency of the light-emitting device ED including the green anode GAN can be improved.

[0198] Therefore, the luminance of the light output from the green pixel G and the red pixel R can be increased.

[0199] Figures 9 to 12 is another example diagram showing a cross section of three pixels applied to a light-emitting display device according to an embodiment of the present disclosure. Figure 13It is an exemplary diagram showing the relationship between the position of the green nanoparticle layer applied to a light-emitting display device according to an embodiment of the present disclosure and the reflectivity. Figure 14 It is an exemplary diagram showing the relationship between the position of the red nanoparticle layer applied to a light-emitting display device according to an embodiment of the present disclosure and the reflectivity. In the following description, details that are the same as or similar to those described with reference to Figures 1 to 8 are omitted or briefly described.

[0200] First, in a light-emitting display device according to an embodiment of the present disclosure, the distances between the red anode RAN and the red reflective electrode 105R, between the green anode GAN and the green reflective electrode 105G, and between the blue anode BAN and the blue reflective electrode 105B can be different.

[0201] For example, as Figures 9 to 12 shown, the distance between the red anode RAN and the red reflective electrode 105R can be greater than the distance between the green anode GAN and the green reflective electrode 105G, and the blue anode BAN can be disposed on the upper surface of the blue reflective electrode 105B.

[0202] That is, there may be no gap between the blue anode BAN and the blue reflective electrode 105B.

[0203] The nanoparticle layer 106 can be disposed above at least one of the red reflective electrode 105R, the green reflective electrode 105G, and the blue reflective electrode 105B.

[0204] In this case, the nanoparticle layer 106 is spaced apart from the red reflective electrode 105R, the green reflective electrode 105G, and the blue reflective electrode 105B.

[0205] For example, in the light-emitting display panel 100 described with reference to Figure 7 and Figure 8 , the nanoparticle layer 106 can be disposed on the upper surface of at least one of the red reflective electrode 105R, the green reflective electrode 105G, and the blue reflective electrode 105B, and in particular, can be disposed on the upper surface of at least one of the red reflective electrode 105R and the green reflective electrode 105G.

[0206] However, in the light-emitting display panel 100 to be described with reference to Figures 9 to 12 , the nanoparticle layer 106 is spaced apart from the red reflective electrode 105R, the green reflective electrode 105G, and the blue reflective electrode 105B.

[0207] In this case, the distance between the red nanoparticle layer 106R and the red anode RAN may be different from the distance between the red nanoparticle layer 106R and the red reflective electrode 105R, and the distance between the green nanoparticle layer 106G and the green anode GAN may be different from the distance between the green nanoparticle layer 106G and the green reflective electrode 105G.

[0208] Secondly, for example, as Figure 9 shown, a green nanoparticle layer 106G may be disposed between the green anode GAN and the green reflective electrode 105G, and a red nanoparticle layer 106R may be disposed between the red anode RAN and the red reflective electrode 105R.

[0209] That is, when it is determined that the reflectivities of the red reflective electrode 105R and the green reflective electrode 105G are less than a preset reflectivity range, a red nanoparticle layer 106R may be disposed at the upper end of the red reflective electrode 105R, and a green nanoparticle layer 106G may be disposed at the upper end of the green reflective electrode 105G.

[0210] The red nanoparticle layer 105R may include nanoparticles each having a diameter of 50 nm to 80 nm, and the green nanoparticle layer 105G may include nanoparticles each having a diameter of 10 nm to 20 nm.

[0211] On the surface of the nanoparticles disposed in the red nanoparticle layer 106R, due to the plasma phenomenon, the reflectivity of light may increase. Therefore, the light extraction efficiency of the light-emitting device including the red anode RAN may increase.

[0212] In addition, on the surface of the nanoparticles disposed in the green nanoparticle layer 106G, due to the plasma phenomenon, the reflectivity of light may increase. Therefore, the light extraction efficiency of the light-emitting device ED including the green anode GAN may increase.

[0213] In this case, the insulating layer 104 may include a third auxiliary insulating layer 104c, a fourth auxiliary insulating layer 104d, a fifth auxiliary insulating layer 104e, and a sixth auxiliary insulating layer 104f.

[0214] Each of the third auxiliary insulating layer 104c, the fourth auxiliary insulating layer 104d, the fifth auxiliary insulating layer 104e, and the sixth auxiliary insulating layer 104f may be formed of at least one organic layer, at least one inorganic layer, or at least one organic layer and at least one inorganic layer.

[0215] In addition, the third auxiliary insulating layer 104c, the fourth auxiliary insulating layer 104d, the fifth auxiliary insulating layer 104e, and the sixth auxiliary insulating layer 104f may be formed of the same material.

[0216] For example, each of the third auxiliary insulating layer 104c, the fourth auxiliary insulating layer 104d, the fifth auxiliary insulating layer 104e, and the sixth auxiliary insulating layer 104f may be formed of silicon nitride (SiNx).

[0217] For example, as Figure 9 shown, a red reflective electrode 105R may be disposed on the planarization layer 103, and the planarization layer 103 and the red reflective electrode 105R may be covered by the third auxiliary insulating layer 104c.

[0218] A red nanoparticle layer 106R is disposed on the third auxiliary insulating layer 104c, and the third auxiliary insulating layer 104c and the red nanoparticle layer 106R may be covered by the fourth auxiliary insulating layer 104d.

[0219] A green reflective electrode 105G may be disposed on the fourth auxiliary insulating layer 104d, and the green reflective electrode 105G and the fourth auxiliary insulating layer 104d may be covered by the fifth auxiliary insulating layer 104e.

[0220] A green nanoparticle layer 106G may be disposed on the fifth auxiliary insulating layer 104e, and the fifth auxiliary insulating layer 104e and the green nanoparticle layer 106G may be covered by the sixth auxiliary insulating layer 104f.

[0221] A blue reflective electrode 105B may be disposed on the sixth auxiliary insulating layer 104f, and a blue anode BAN may be disposed on the blue reflective electrode 105B.

[0222] A green anode GAN and a red anode RAN may be disposed on the sixth auxiliary insulating layer 104f.

[0223] With the above structure, the light extraction efficiency of the light-emitting device including the red anode RAN can be improved, and the light extraction efficiency of the light-emitting device including the green anode GAN can be improved.

[0224] Therefore, the brightness of the light output from the red pixel R and the green pixel G can be increased.

[0225] In this case, the distance GG1 between the green anode GAN and the green nanoparticle layer 106G may be greater than the distance GG2 between the green nanoparticle layer 106G and the green reflective electrode 105G. Hereinafter, the distance GG1 may be the thickness of the sixth auxiliary insulating layer 104f, and the distance GG2 may be the thickness of the fifth auxiliary insulating layer 104e.

[0226] In addition, the distance GG2 between the green nanoparticle layer 106G and the green reflective electrode 105G can be one of 0% to 20% of the distance (GG1 + GG2) between the green anode GAN and the green reflective electrode 105G.

[0227] In addition, the distance RR1 between the red anode RAN and the red nanoparticle layer 106R can be greater than the distance RR2 between the red nanoparticle layer 106R and the red reflective electrode 105R. Hereinafter, the distance RR1 can be the thicknesses of the sixth auxiliary insulating layer 104f, the fifth auxiliary insulating layer 104e, and the fourth auxiliary insulating layer 104d, and the distance RR2 can be the thickness of the third auxiliary insulating layer 104c.

[0228] In addition, the distance RR2 between the red nanoparticle layer 106R and the red reflective electrode 105R can be any one of 0% to 15% of the distance RR1 + RR2 between the red anode RAN and the red reflective electrode 105R.

[0229] The ratios of the above distances can be set through various tests and simulations.

[0230] For example, Figure 13 is an example graph showing the change in luminous intensity according to the following ratios: Figure 9 The ratio of the distance GG2 between the green nanoparticle layer 106G and the green reflective electrode 105G shown in to the distance GG1 between the green anode GAN and the green nanoparticle layer 106G.

[0231] That is, Figure 13 is a graph showing the change in luminous intensity of the light output from the light-emitting device ED including the green anode GAN when Figure 9 the thickness GG2 of the fifth auxiliary insulating layer 104e and the thickness GG1 of the sixth auxiliary insulating layer 104f shown in change. In Figure 13 the dotted line XG represents the thickness GG2 of the fifth auxiliary insulating layer 104e, the solid line YG represents the thickness GG1 of the sixth auxiliary insulating layer 104f, and the curve ZG represents the luminous intensity of the green light.

[0232] For example, referring to Figure 13 as the length of the dotted line XG decreases and the length of the solid line YG increases, the luminous intensity ZG increases.

[0233] This means that as the thickness GG2 of the fifth auxiliary insulating layer 104e decreases and the thickness GG1 of the sixth auxiliary insulating layer 104f increases, the luminous intensity ZG increases.

[0234] In particular, according to Figure 13, when the distance GG2 between the green nanoparticle layer 106G and the green reflective electrode 105G is included in the range M of 0% to 20% of the distance (GG1 + GG2) between the green anode GAN and the green reflective electrode 105G, the emission intensity ZG is high.

[0235] This means that when the thickness GG2 of the fifth auxiliary insulating layer 104e is included in the range M of 0% to 20% of the thickness (GG1 + GG2) of the fifth auxiliary insulating layer 104e and the sixth auxiliary insulating layer 104f, the emission intensity ZG is high.

[0236] In addition, Figure 14 is an example graph showing the change in emission intensity according to the following ratio: Figure 9 the ratio of the distance RR2 between the red nanoparticle layer 106R and the red reflective electrode 105R shown in

[0237] Figure 14 is showing when Figure 9 the thickness RR2 of the third auxiliary insulating layer 104c and the thickness RR1 of the fourth auxiliary insulating layer 104d shown in Figure 14 change, it is an example graph showing the change in the emission intensity of the light output from the light-emitting device ED including the red anode RAN. In

[0238] For example, referring to Figure 14 , as the length of the dashed line XR decreases and the length of the solid line YR increases, the emission intensity ZR increases.

[0239] This means that as the thickness RR2 of the third auxiliary insulating layer 104c decreases and the thickness RR1 of the fourth auxiliary insulating layer 104d increases, the emission intensity ZR increases.

[0240] In particular, according to Figure 14 , when the distance RR2 between the red nanoparticle layer 106R and the red reflective electrode 105R is included in the range N of 0% to 15% of the distance (RR1 + RR2) between the red anode RAN and the red reflective electrode 105R, the emission intensity is high.

[0241] This means that when the thickness RR2 of the third auxiliary insulating layer 104c is included in the range N of 0% to 15% of the thickness (RR1 + RR2) of the third auxiliary insulating layer 104c and the fourth auxiliary insulating layer 104d, the emission intensity ZR is high.

[0242] Therefore, in Figure 9In the light-emitting display panel 100 shown in Figure 13 and Figure 14 The distances GG1 between the green anode GAN and the green nanoparticle layer 106G, GG2 between the green nanoparticle layer 106G and the green reflective electrode 105G, RR1 between the red anode RAN and the red nanoparticle layer 106R, and RR2 between the red nanoparticle layer 106R and the red reflective electrode 105R can be set differently using the diagrams shown in

[0243] Above, a light-emitting display panel 100 has been described in which a green nanoparticle layer 106G is provided between the green anode GAN and the green reflective electrode 105G, and a red nanoparticle layer 106R is provided between the red anode RAN and the red reflective electrode 105R.

[0244] However, in the light-emitting display panel 100 applied to a light-emitting display device according to an embodiment of the present disclosure, a green nanoparticle layer 106G can be provided only between the green anode GAN and the green reflective electrode 105G, and nanoparticle layers may not be provided between the red anode RAN and the red reflective electrode 105R and between the blue anode BAN and the blue reflective electrode 105B.

[0245] In addition, in the light-emitting display panel 100 applied to a light-emitting display device according to an embodiment of the present disclosure, a red nanoparticle layer 106R can be provided only between the red anode RAN and the red reflective electrode 105R, and nanoparticle layers may not be provided between the green anode GAN and the green reflective electrode 105G and between the blue anode BAN and the blue reflective electrode 105B.

[0246] Hereinafter, the Figures 10 to 12 Light-emitting display panel 100 shown in will be described. In the following description, details that are the same as or similar to those described with reference to Figure 9 will be omitted or briefly described.

[0247] Third, as Figure 10 shown, Figure 9 The green nanoparticle layer 106G shown in can extend to the lower end of the blue reflective electrode 105B.

[0248] As described above, the light-emitting display panel 100 applied to a light-emitting display device according to an embodiment of the present disclosure can include a substrate 101 provided with a semiconductor and can be applied to small electronic devices such as virtual reality (VR) devices and augmented reality (AR) devices.

[0249] In this case, the area of pixel P and the distance between pixels P are smaller than the area of pixels and the distance between pixels in a light-emitting display panel using a glass substrate and a plastic substrate.

[0250] Therefore, when, as Figure 9 shown, a green nanoparticle layer 106G is provided between a green anode GAN and a green reflective electrode 105G, and a red nanoparticle layer 106R is provided between a red anode RAN and a red reflective electrode 105R, the green nanoparticle layer 106G can extend to the lower end of the blue reflective electrode 105B, as Figure 10 shown. In this case, the green nanoparticle layer 106G can be patterned so as not to overlap with the red reflective electrode 105R or the red nanoparticle layer 106R.

[0251] To provide additional description, the green nanoparticle layer 106G extending to the lower end of the blue reflective electrode 105B has no effect on the blue pixel B. In other words, the green nanoparticle layer 106G can extend across the green pixel G and the blue pixel B without affecting the blue pixel B, which can improve or simplify the manufacture of the device.

[0252] However, if the green nanoparticle layer 106G overlaps with the red reflective electrode 105R or the red nanoparticle layer 106R, the light reflected from the red reflective electrode 105R or the red nanoparticle layer 106R may be affected by the green nanoparticle layer 106G. Therefore, the green nanoparticle layer 106G can be patterned so as not to overlap with the red reflective electrode 105R or the red nanoparticle layer 106R.

[0253] The process of preventing the green nanoparticle layer 106G from overlapping with the red reflective electrode 105R can be simpler than the process of preventing the green nanoparticle layer 106G from overlapping with both the red reflective electrode 105R and the blue reflective electrode 105B.

[0254] Therefore, Figure 10 the manufacturing process of the light-emitting display panel shown in Figure 9 can be simpler than the manufacturing process of the light-emitting display panel shown in

[0255] Fourth, as Figure 11 shown, Figure 9 the red nanoparticle layer 106R shown in Figure 10 or the red nanoparticle layer 106R shown in

[0256] For example, as Figure 11As shown, when a green nanoparticle layer 106G is provided between the green anode GAN and the green reflective electrode 105G, and a red nanoparticle layer 106R is provided between the red anode RAN and the red reflective electrode 105R, the red nanoparticle layer 106R can extend to the lower ends of the blue reflective electrode 105B and the green reflective electrode 105G. In this case, the red nanoparticle layer 106R can overlap with the green reflective electrode 105G and the blue reflective electrode 105B.

[0257] However, the red nanoparticle layer 106R that extends to the lower ends of the blue reflective electrode 105B and the green reflective electrode 105G has no effect on the blue pixel B and the green pixel G.

[0258] Therefore, the red nanoparticle layer 106R can be provided on the entire upper surface of the third auxiliary insulating layer 104c.

[0259] Therefore, Figure 11 the manufacturing process of the light-emitting display panel shown in Figure 9 and Figure 10 can be simpler than the manufacturing process of the light-emitting display panel shown in

[0260] Fifth, as Figure 12 shown, when a red nanoparticle layer 106R is provided between the red anode RAN and the red reflective electrode 105R, the red nanoparticle layer 106R can extend to the lower ends of the blue reflective electrode 105B and the green reflective electrode 105G.

[0261] For example, as Figure 12 shown, when only a red nanoparticle layer 106R is provided between the red anode RAN and the red reflective electrode 105R, and no nanoparticle layer is provided between the green anode GAN and the green reflective electrode 105G and between the blue anode BAN and the blue reflective electrode 105B, the red nanoparticle layer 106R can extend to the lower ends of the blue reflective electrode 105B and the green reflective electrode 105G. In this case, the red nanoparticle layer 106G can overlap with the green reflective electrode 105R and the blue reflective electrode 105B.

[0262] However, the red nanoparticle layer 106R that extends to the lower ends of the blue reflective electrode 105B and the green reflective electrode 105G has no effect on the blue pixel B and the green pixel G. Therefore, the red nanoparticle layer 106R can be provided on the entire upper surface of the third auxiliary insulating layer 104c.

[0263] To provide additional description, when it is determined that the reflectivity of the red reflective electrode 105R is less than a preset reflectivity range, and thus the luminance of the light output from the red pixel R is less than the luminance of the light output from the green pixel G and the blue pixel B, the red nanoparticle layer 106R can be provided only on the red reflective electrode 105R, as Figure 12 shown.

[0264] In addition, as Figure 12 shown, when it is difficult to pattern the green nanoparticle layer 106G in the form shown in Figures 9 to 11 , the red nanoparticle layer 106R can be provided only on the red reflective electrode 105R.

[0265] Therefore, Figure 12 the manufacturing process of the light-emitting display panel shown in Figures 9 to 11 can be simpler than the manufacturing process of the light-emitting display panel shown in

[0266] The features of the light-emitting display device according to an embodiment of the present disclosure are briefly summarized as follows.

[0267] The light-emitting display device according to an embodiment of the present disclosure includes: a substrate; a planarization layer configured to cover a pixel driving circuit layer provided on the substrate; an insulating layer configured to be provided on the planarization layer; a nanoparticle layer configured to be provided in the insulating layer; and a first anode, a second anode, and a third anode configured to be provided on the insulating layer, wherein the nanoparticle layer is provided at a lower end of at least one of the first anode, the second anode, and the third anode.

[0268] A first reflective electrode is provided at a lower end of the first anode, a second reflective electrode is provided at a lower end of the second anode, and a third reflective electrode is provided at a lower end of the third anode. The nanoparticle layer is provided at at least one of the following positions: a position between the first anode and the first reflective electrode, a position between the second anode and the second reflective electrode, and a position between the third anode and the third reflective electrode.

[0269] The diameters of the nanoparticles included in the nanoparticle layer provided at the lower end of the first anode, the diameters of the nanoparticles included in the nanoparticle layer provided at the lower end of the second anode, and the diameters of the nanoparticles included in the nanoparticle layer provided at the lower end of the third anode are different from each other.

[0270] The distances between the first anode and the first reflective electrode, the distances between the second anode and the second reflective electrode, and the distances between the third anode and the third reflective electrode are different from each other. The nanoparticle layer is provided on an upper surface of at least one of the first reflective electrode, the second reflective electrode, and the third reflective electrode.

[0271] The insulating layer includes a first auxiliary insulating layer and a second auxiliary insulating layer. The first reflective electrode is disposed on the planarization layer, and the planarization layer and the first reflective electrode are covered by the first auxiliary insulating layer. The second reflective electrode is disposed on the first auxiliary insulating layer, the nanoparticle layer is disposed on the second reflective electrode, and the nanoparticle layer and the first auxiliary insulating layer are covered by the second auxiliary insulating layer. The third reflective electrode is disposed on the second auxiliary insulating layer, the third anode is disposed on the third reflective electrode, and the second anode and the first anode are disposed on the second auxiliary insulating layer.

[0272] The distances between the first anode and the first reflective electrode, between the second anode and the second reflective electrode, and between the third anode and the third reflective electrode are different from each other. The nanoparticle layer is disposed above at least one of the first reflective electrode, the second reflective electrode, and the third reflective electrode, and the nanoparticle layer is spaced apart from the first reflective electrode, the second reflective electrode, and the third reflective electrode.

[0273] The nanoparticle layer includes: a second nanoparticle layer disposed between the second anode and the second reflective electrode, and a first nanoparticle layer disposed between the first anode and the first reflective electrode.

[0274] The insulating layer includes a third auxiliary insulating layer, a fourth auxiliary insulating layer, a fifth auxiliary insulating layer, and a sixth auxiliary insulating layer. The first reflective electrode is disposed on the planarization layer, and the planarization layer and the first reflective electrode are covered by the third auxiliary insulating layer. The first nanoparticle layer is disposed on the third auxiliary insulating layer, and the third auxiliary insulating layer and the first nanoparticle layer are covered by the fourth auxiliary insulating layer. The second reflective electrode is disposed on the fourth auxiliary insulating layer, and the second reflective electrode and the fourth auxiliary insulating layer are covered by the fifth auxiliary insulating layer. The second nanoparticle layer is disposed on the fifth auxiliary insulating layer, and the fifth auxiliary insulating layer and the second nanoparticle layer are covered by the sixth auxiliary insulating layer. The third reflective electrode is disposed on the sixth auxiliary insulating layer, the third anode is disposed on the third reflective electrode, and the second anode and the first anode are disposed on the sixth auxiliary insulating layer.

[0275] The distance between the second anode and the second nanoparticle layer is greater than the distance between the second nanoparticle layer and the second reflective electrode.

[0276] The distance between the second nanoparticle layer and the second reflective electrode is 0% to 20% of the distance between the second anode and the second reflective electrode.

[0277] The distance between the first anode and the first nanoparticle layer is greater than the distance between the first nanoparticle layer and the first reflective electrode.

[0278] The distance between the first nanoparticle layer and the first reflective electrode is 0% to 15% of the distance between the first anode and the first reflective electrode.

[0279] The second nanoparticle layer extends to the lower end of the third reflective electrode.

[0280] The first nanoparticle layer extends to the lower ends of the third reflective electrode and the second reflective electrode.

[0281] The nanoparticle layer includes a first nanoparticle layer disposed between the first anode and the first reflective electrode, and the first nanoparticle layer extends to the lower ends of the third reflective electrode and the second reflective electrode.

[0282] The first anode is an anode disposed in a red pixel, the second anode is an anode disposed in a green pixel, and the third anode is an anode disposed in a blue pixel.

[0283] The light-emitting display device according to an embodiment of the present disclosure can be applied to all electronic devices including a light-emitting display panel. For example, the light-emitting display device according to the present disclosure can be applied to virtual reality (VR) devices, augmented reality (AR) devices, mobile devices, video phones, smart watches, watch phones or wearable devices, foldable devices, rollable devices, bendable devices, flexible devices, curved devices, electronic notebooks, e-books, PMPs (portable multimedia players), PDAs (personal digital assistants), MP3 players, mobile medical devices, desktop PCs, laptop PCs, netbook computers, workstations, navigation, car navigation, vehicle display devices, TVs, wallpaper display devices, sign devices, game devices, laptop computers, monitors, imaging devices, portable cameras, and household appliances.

[0284] In the light-emitting display device according to an embodiment of the present disclosure, a reflective electrode and nanoparticles can be disposed in an insulating layer at the lower end of the anode.

[0285] The reflective electrode can reflect light generated from the light-emitting layer on the anode, and can adjust the frequency band of the light through the optical distance between the reflective electrode and the anode.

[0286] In addition, the nanoparticles can efficiently reflect the light generated in the light-emitting layer by using the plasmon phenomenon. Therefore, the amount of light output in the cathode direction can be increased.

[0287] Therefore, in the light-emitting display device according to an embodiment of the present disclosure, power consumption can be reduced.

[0288] That is, even when driven at low power, the light-emitting display device according to an embodiment of the present disclosure can output an image with higher brightness than the prior art.

[0289] In addition, since the positions of the nanoparticles can be determined for each pixel through various tests and simulations, the brightness of each pixel can be efficiently increased.

[0290] Therefore, in the light-emitting display device according to an embodiment of the present disclosure, the amount of light reflected from the lower end of the anode toward the cathode can be increased, and thus, the brightness of the light output from the pixel can be increased.

[0291] Since the brightness of the light output from the pixel is increased, the quality of the light-emitting display device can be improved.

[0292] The above-described features, structures, and effects of the present disclosure are included in at least one embodiment of the present disclosure, but are not limited to only one embodiment. In addition, those skilled in the art can implement the features, structures, and effects described in at least one embodiment of the present disclosure through combinations or modifications of other embodiments. Therefore, the content associated with combinations and modifications should be construed as being within the scope of the present disclosure.

[0293] It is apparent to those skilled in the art that various modifications and variations can be made to the present disclosure without departing from the spirit or scope of the present disclosure. Therefore, the present disclosure is intended to cover modifications and variations of the present disclosure as long as they fall within the scope of the present disclosure.

Claims

1. A light-emitting display device, comprising: substrate; a planarization layer, the planarization layer being configured to cover a pixel driving circuit layer disposed on the substrate; an insulating layer configured to be disposed on the planarization layer; a nanoparticle layer configured to be disposed in the insulating layer; as well as a first anode, a second anode, and a third anode, wherein the first anode, the second anode, and the third anode are configured to be disposed on the insulating layer, The nanoparticle layer is disposed at a lower end of at least one of the first anode, the second anode and the third anode.

2. The light-emitting display device according to claim 1, wherein: A first reflective electrode is disposed at a lower end of the first anode, a second reflective electrode is disposed at a lower end of the second anode, a third reflective electrode is disposed at a lower end of the third anode, and The nanoparticle layer is disposed at at least one of the following positions: a position between the first anode and the first reflective electrode, a position between the second anode and the second reflective electrode, and a position between the third anode and the third reflective electrode.

3. The light-emitting display device according to claim 1, wherein: The diameters of nanoparticles included in the nanoparticle layer disposed at the lower end of the first anode, the diameter of nanoparticles included in the nanoparticle layer disposed at the lower end of the second anode, and the diameter of nanoparticles included in the nanoparticle layer disposed at the lower end of the third anode are different from each other.

4. The light-emitting display device according to claim 2, wherein: A distance between the first anode and the first reflective electrode, a distance between the second anode and the second reflective electrode, and a distance between the third anode and the third reflective electrode are different from each other, and The nano particle layer is disposed on an upper end surface of at least one of the first reflective electrode, the second reflective electrode, and the third reflective electrode.

5. The light-emitting display device according to claim 4, wherein: The insulating layer includes a first auxiliary insulating layer and a second auxiliary insulating layer, The first reflective electrode is disposed on the planarization layer. The planarization layer and the first reflective electrode are covered by the first auxiliary insulating layer, The second reflective electrode is disposed on the first auxiliary insulating layer. The nanoparticle layer includes a second nanoparticle layer disposed on the second reflective electrode, The second nanoparticle layer and the first auxiliary insulating layer are covered by the second auxiliary insulating layer, The third reflective electrode is disposed on the second auxiliary insulating layer. The third anode is disposed on the third reflective electrode, and The second anode and the first anode are disposed on the second auxiliary insulating layer.

6. The light-emitting display device according to claim 2, wherein: A distance between the first anode and the first reflective electrode, a distance between the second anode and the second reflective electrode, and a distance between the third anode and the third reflective electrode are different from each other. The nanoparticle layer is disposed above at least one of the first reflective electrode, the second reflective electrode, and the third reflective electrode, and The nano particle layer is spaced apart from the first reflective electrode, the second reflective electrode, and the third reflective electrode.

7. The light-emitting display device according to claim 6, wherein: The nanoparticle layer includes a second nanoparticle layer disposed between the second anode and the second reflective electrode, and a first nanoparticle layer disposed between the first anode and the first reflective electrode.

8. The light-emitting display device according to claim 7, wherein: The insulating layer includes a third auxiliary insulating layer, a fourth auxiliary insulating layer, a fifth auxiliary insulating layer and a sixth auxiliary insulating layer, The first reflective electrode is disposed on the planarization layer. The planarization layer and the first reflective electrode are covered by the third auxiliary insulating layer, The first nanoparticle layer is disposed on the third auxiliary insulating layer, The third auxiliary insulating layer and the first nanoparticle layer are covered by the fourth auxiliary insulating layer, The second reflective electrode is disposed on the fourth auxiliary insulating layer, The second reflective electrode and the fourth auxiliary insulating layer are covered by the fifth auxiliary insulating layer, The second nanoparticle layer is disposed on the fifth auxiliary insulating layer, The fifth auxiliary insulating layer and the second nanoparticle layer are covered by the sixth auxiliary insulating layer, The third reflective electrode is disposed on the sixth auxiliary insulating layer, The third anode is disposed on the third reflective electrode, and The second anode and the first anode are disposed on the sixth auxiliary insulating layer.

9. The light-emitting display device according to claim 7, wherein: A distance between the second anode and the second nanoparticle layer is greater than a distance between the second nanoparticle layer and the second reflective electrode.

10. The light emitting display device according to claim 7, wherein: The distance between the second nanoparticle layer and the second reflective electrode is any one of 0% to 20% of the distance between the second anode and the second reflective electrode.

11. The light-emitting display device according to claim 7, wherein: The distance between the first anode and the first nanoparticle layer is greater than the distance between the first nanoparticle layer and the first reflective electrode.

12. The light-emitting display device according to claim 7, wherein: The distance between the first nanoparticle layer and the first reflective electrode is any one of 0% to 15% of the distance between the first anode and the first reflective electrode.

13. The light-emitting display device according to claim 7, wherein: The second nanoparticle layer extends to a lower end of the third reflective electrode.

14. The light-emitting display device according to claim 7, wherein: The first nano-particle layer extends to a lower end of the third reflective electrode and a lower end of the second reflective electrode.

15. The light emitting display device according to claim 6, wherein: The nanoparticle layer includes a first nanoparticle layer disposed between the first anode and the first reflective electrode, and the first nanoparticle layer extends to lower ends of the third reflective electrode and the second reflective electrode.

16. The light-emitting display device according to claim 1 or 2, wherein: The first anode is an anode provided in a red pixel, the second anode is an anode provided in a green pixel, the third anode is an anode provided in a blue pixel, and The first reflective electrode is arranged in the red pixel, the second reflective electrode is arranged in the green pixel, and the third reflective electrode is arranged in the blue pixel.

17. A light-emitting display device, comprising: A first sub-pixel, a second sub-pixel and a third sub-pixel are disposed on the substrate, wherein the first sub-pixel, the second sub-pixel and the third sub-pixel include a first anode, a second anode and a third anode respectively; a first reflective electrode disposed below the first anode of the first sub-pixel; a second reflective electrode disposed below the second anode of the second sub-pixel; a third reflective electrode disposed below the third anode of the third sub-pixel; as well as A nanoparticle layer is provided between the first reflective electrode and the first anode, between the second reflective electrode and the second anode, or between the third reflective electrode and the third anode.

18. The light emitting display device according to claim 17, wherein: The nanoparticle layer includes a plurality of metal nanoparticles.

19. The light emitting display device according to claim 17, wherein: The nanoparticle layer includes a first nanoparticle layer and a second nanoparticle layer, and The first nanoparticle layer is located at a first distance from the substrate, and the second nanoparticle layer is located at a second distance from the substrate, and the second distance is different from the first distance.

20. The light emitting display device according to claim 17, wherein: The nanoparticle layer includes: a first nanoparticle layer including a first plurality of nanoparticles disposed between the third reflective electrode and the third anode; and a second nanoparticle layer including a second plurality of nanoparticles disposed between the second reflective electrode and the second anode, and Wherein, the size of the first plurality of nanoparticles is greater than the size of the second plurality of nanoparticles.

21. The light emitting display device according to claim 17, wherein: The nanoparticle layer comprises: a first nanoparticle layer comprising a first plurality of nanoparticles, and a second nanoparticle layer comprising a second plurality of nanoparticles, and Wherein, at least one of the first reflective electrode, the second reflective electrode and the third reflective electrode is disposed between the first nanoparticle layer and the second nanoparticle layer.

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