CN218851229U - Light emitting module and light emitting device - Google Patents

Abstract

The disclosure provides a light-emitting module and a light-emitting device, which belong to the field of lighting technology. It discloses a light-emitting module, which includes a first base substrate, a functional layer and at least one light-emitting device arranged on the first base substrate. element; the light-emitting element is provided with a first electrode, a light-emitting layer and a second electrode in sequence along the direction away from the first substrate on the functional layer; the functional layer is located at the first electrode close to the first substrate One side of the substrate is configured to convert the light emitted by the light-emitting element into light of a specific color; wherein the functional layer includes N sub-functional layers arranged in sequence away from the first base substrate, N≥3 The sub-functional layer includes at least one first sub-functional layer and at least one second sub-functional layer; the first sub-functional layer and the second sub-functional layer are arranged alternately; the refraction of the first sub-functional layer The index is greater than the refractive index of the second sub-functional layer.

Description

Lighting Modules and Lighting Devices

technical field

The disclosure belongs to the technical field of lighting, and in particular relates to a light emitting module and a light emitting device.

Background technique

Traditional taillight products usually use light emitting diodes (LEDs). With the development of organic light-emitting diode (Organic Light-Emitting Diode, OLED), OLED has the advantages of self-luminescence, wide viewing angle, almost infinitely high contrast, low power consumption, high response speed, etc. received more and more attention. OLED products for car taillights are becoming more and more popular in the market and are becoming more and more diversified.

With the development of the field of lighting technology and the field of automobile technology, the colors of taillights are also becoming more and more diverse. Therefore, under the premise of not increasing the cost, for example: without increasing the cost of the mask plate, how to design taillight products with multiple colors to meet the diverse needs of the market has become a problem that needs to be solved today.

Utility model content

The utility model aims to solve at least one of the technical problems in the prior art, and provides a light-emitting module and a light-emitting device that can emit light in multiple colors without increasing the cost of the mask.

In a first aspect, an embodiment of the present disclosure provides a light-emitting module, which includes a first base substrate, a functional layer and at least one light-emitting element disposed on the first base substrate;

The light-emitting element is provided with a first electrode, a light-emitting layer, and a second electrode in sequence along the direction away from the first base substrate on the functional layer;

The functional layer is located on the side of the first electrode close to the first base substrate, and is configured to convert the light emitted by the light-emitting element into light of a specific color; wherein, the functional layer includes N sub-functional layers arranged sequentially on the first base substrate, N≥3;

The sub-functional layer includes at least one first sub-functional layer and at least one second sub-functional layer; the first sub-functional layer and the second sub-functional layer are arranged alternately; the refractive index of the first sub-functional layer greater than the refractive index of the second sub-functional layer.

Wherein, the material of the first sub-functional layer is silicon nitride or silicon oxynitride.

Wherein, the refractive index of the material of the first sub-functional layer is 1.6-2.0.

Wherein, the material of the second sub-functional layer is silicon oxide.

Wherein, the refractive index of the material of the second sub-functional layer is 1.2-1.6.

Wherein, the functional layer includes N sub-functional layers, N≧3; one of the sub-functional layers closest to the light-emitting element is the first sub-functional layer.

Wherein, the functional layer includes N sub-functional layers, N≧3; one of the sub-functional layers closest to the light-emitting element is the second sub-functional layer.

Wherein, when the light emitting color of the light-emitting module is orange, the functional layer includes two layers of the first sub-functional layer and a second sub-functional layer sandwiched between the two layers of the first sub-functional layer. Sub-functional layer; the thickness of the first sub-functional layer is 66nm; the thickness of the second sub-functional layer is 50nm.

Wherein, when the light emitting color of the light-emitting module is red, the functional layer includes two layers of the first sub-functional layer and a second sub-functional layer interposed between the two layers of the first sub-functional layer. Functional layer; the thickness of the first sub-functional layer is 66nm; the thickness of the second sub-functional layer is 70nm.

Wherein, the first electrode is a transparent electrode; the second electrode is a reflective electrode.

Wherein, the light-emitting module further includes a second base substrate disposed opposite to the first base substrate, and a reflective layer disposed on a side of the second base substrate away from the light-emitting element;

The orthographic projection of the reflective layer on the first base substrate covers the orthographic projection of the reflective electrodes of each of the light emitting elements on the first base substrate.

Wherein, the light emitting module further includes a packaging base and a packaging structure located at the edge of the light emitting module and arranged between the first base substrate and the second base substrate;

The packaging base is located on the side of the functional layer away from the first base substrate; the second electrode of the light-emitting element located at the edge of the light-emitting module is partially covered on the packaging base;

The encapsulation structure is used to seal the edge of the light emitting module.

Wherein, the packaging substrate includes a main body structure and a plurality of branch structures; the packaging structure is at least partially embedded in the gap formed between each of the branch structures.

In a second aspect, an embodiment of the present disclosure provides a lighting device, including any one of the lighting modules described above.

Description of drawings

FIG. 1 is a schematic structural diagram of a light emitting element provided by an embodiment of the present disclosure;

FIG. 2 is a schematic structural diagram of a light-emitting layer of a light-emitting element in an embodiment of the present disclosure;

Fig. 3 is a schematic structural diagram of a light emitting module provided by an embodiment of the present disclosure;

FIG. 4 is a schematic diagram of a functional layer structure provided by an embodiment of the present disclosure;

Wherein the reference numerals are: 101, first base substrate; 102, second base substrate; 103, reflective layer; 201, functional layer; 2011, first sub-functional layer; 2012, second sub-functional layer; 202, Packaging substrate; 203, first electrode; 204, light emitting layer; 205, second electrode; 301, packaging structure; HIL, hole injection layer; HTL, hole transport layer; EBL, electron blocking layer; EML, organic light emitting layer ; HBL, hole blocking layer; ETL, electron transport layer.

Detailed ways

In order to enable those skilled in the art to better understand the technical solution of the utility model, the utility model will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

Unless otherwise defined, the technical terms or scientific terms used in the present disclosure shall have the usual meanings understood by those skilled in the art to which the present disclosure belongs. "First", "second" and similar words used in the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. Likewise, words like "a", "an" or "the" do not denote a limitation of quantity, but mean that there is at least one. "Comprising" or "comprising" and similar words mean that the elements or items appearing before the word include the elements or items listed after the word and their equivalents, without excluding other elements or items. Words such as "connected" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "Down", "Left", "Right" and so on are only used to indicate the relative positional relationship. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

The light-emitting element used in the light-emitting module is usually a light-emitting diode (Light Emitting Diode, LED). The advantages of contrast, low power consumption, and high response speed are gradually used in the field of lighting technology. At the same time, in the automotive market, the requirements for the lighting quality of taillights are getting higher and higher, so OLED products for taillights are becoming more and more popular, and taillight products with multiple colors are also popular. How to design taillight products with multiple colors without additional cost has become a problem that needs to be solved today.

In view of this, the embodiments of the present disclosure provide a taillight product with multiple colors without additional mask plate cost. If the organic electroluminescent diode is improved to have multiple colors, the process flow and the number of masks may be increased. The mask occupies a certain amount of cost in the production of organic electroluminescent diodes. The light-emitting module in the embodiment of the present disclosure can be produced with multiple colors without increasing the mask plate and process flow, and can be used in taillight products to make the taillights have multiple colors.

The light-emitting module of the embodiment of the present disclosure will be described below with reference to the drawings and specific embodiments.

In the first aspect, the embodiment of the disclosure discloses a light-emitting module. FIG. 1 is a schematic structural diagram of a light-emitting element provided by the embodiment of the disclosure, and FIG. 2 is a schematic structural diagram of the light-emitting layer of the light-emitting element in the embodiment of the disclosure; FIG. 3 is a schematic structural diagram of a light-emitting module provided by an embodiment of the present disclosure. As shown in FIGS. 1-3 , the light-emitting module includes a first base substrate 101 and a functional layer 201 and At least one light-emitting element, at least one light-emitting element is provided with a first electrode 203, a light-emitting layer 204 and a second electrode 205 in sequence on the functional layer 201, the functional layer 201 is configured to convert the light emitted by the light-emitting element into light of a specific color, and the function The layer 201 is provided with at least three sub-functional layers in sequence along the direction away from the first base substrate 101 .

The light-emitting element in the embodiment of the present disclosure is an organic light-emitting diode (Organic Light-Emitting Diode, OLED), and the structure of the organic light-emitting diode includes an anode, a light-emitting layer 204, and a cathode that are sequentially arranged on a substrate substrate, wherein the light-emitting layer 204 includes a hole injection layer HIL, a hole transport layer HTL, an electron blocking layer EBL, an organic light emitting layer EML, a hole blocking layer HBL, and an electron transport layer ETL. After the voltage is applied to the anode and cathode, holes and electrons are injected from the anode and cathode respectively, and enter the HOMO (highest occupied molecular orbital) energy level of the hole transport layer HTL and the LUMO (lowest unoccupied molecular orbital) energy level of the electron transport layer ETL, respectively. ) energy level, and then jump to the organic light-emitting layer EML to meet and form electron-hole pairs, that is, excitons. Excitons in the molecular excited state are released as photons, emitting visible light.

Organic electroluminescent diodes include two types, top-emitting organic electroluminescent diodes and bottom-emitting organic electroluminescent diodes. The light output direction of the top-emitting organic light-emitting diode is emitted along the direction away from the substrate, that is, the light is emitted from the cathode side; the anode, hole injection layer HIL, Hole transport layer HTL, electron blocking layer EBL, organic light-emitting layer EML, hole blocking layer HBL, electron transport layer ETL and cathode; the anode is a metal electrode with certain light reflectivity; the cathode is translucent or transparent The electrode; its first base substrate 101 can be metal, organic synthetic material and inorganic synthetic material. Bottom-emitting organic light-emitting diodes are opposite to top-emitting organic light-emitting diodes, and emit light along the direction close to the substrate, that is, light is emitted from the side of the substrate; bottom-emitting organic light-emitting diodes are on the first substrate The anode, hole injection layer HIL, hole transport layer HTL, electron blocking layer EBL, organic light-emitting layer EML, hole blocking layer HBL, electron transport layer ETL and cathode that are arranged in sequence on 101; the anode is a transparent electrode with good The light output property; the cathode is a reflective electrode, which can reflect most of the light so that it can be emitted from the side of the substrate. The substrate is usually made of materials with excellent light transmission effects such as glass or light-transmitting film.

It should be noted that during the light emitting process of the bottom-emitting organic electroluminescent diode, the light emitted by the organic light-emitting layer EML directly passes through the transparent electrode used as the anode, and is emitted from the substrate substrate, and the organic light-emitting layer EML also has a part of light It propagates to the reflective electrode used for the cathode, and the reflective electrode reflects part of the light, and the reflected light forms resonance with each other, and at the same time, the reflected light and the light transmitted from the organic light-emitting layer EML to the transparent electrode form a resonance, forming a microcavity effect. The luminous brightness of the organic electroluminescent diode is improved. It is understandable that part of the light in the organic light-emitting layer EML of the top-emitting organic light-emitting diode is directly emitted from the cathode, and part of the light is reflected by the metal anode, which can also form a microcavity effect and improve the light emission of the organic light-emitting diode. brightness. A top-emitting organic electroluminescent diode can be used, and a bottom-emitting organic electroluminescent diode can also be used. In the implementation of the present disclosure, the use of a bottom-emitting organic electroluminescent diode is used as an example for illustration.

As shown in FIG. 1 , the light-emitting element in the embodiment of the present disclosure has a first electrode 203, a light-emitting layer 204, and a second electrode 205 arranged sequentially on the functional layer 201, and the orthographic projection of the second electrode 205 located on the functional layer 201 completely covers the light-emitting layer. 204 is located on the orthographic projection of the functional layer 201 , and the orthographic projection of the light emitting layer 204 on the functional layer 201 completely covers the orthographic projection of the first electrode 203 on the functional layer 201 . The first electrode 203 is a transparent electrode used as an anode of the light emitting element; the second electrode 205 is a reflective electrode used as a cathode of the light emitting element. It can be understood that the second electrode 205 completely covers the light emitting layer 204, so that the light emitted by the light emitting layer 204 can be reflected as much as possible, and the light emitting brightness of the light emitting element can be improved.

It should be noted that the material of the second electrode 205 can be any one of aluminum (Al), silver (Ag), titanium (Ti), molybdenum (Mo), or any of the above alloys. The first electrode 203 The material can be indium tin oxide (ITO) or other conductive materials with good light transmission. The specific materials of the first electrode 203 and the second electrode 205 are not further limited in the embodiment of the present disclosure.

As shown in FIG. 2 , the light emitting layer 204 in the embodiment of the present disclosure includes a hole injection layer HIL, a hole transport layer HTL, an electron blocking layer EBL, an organic light emitting layer EML, Hole blocking layer HBL, electron transport layer ETL. The first electrode 203 is a transparent electrode, used as an anode, and the second electrode 205 is a reflective electrode, used as a cathode. By applying voltage to the anode and cathode, holes and electrons are injected from the anode and cathode respectively, and enter the space respectively. The HOMO (highest occupied molecular orbital) energy level of the hole transport layer HTL and the LUMO (lowest vacant molecular orbital) energy level of the electron transport layer ETL then transition to the organic light-emitting layer EML to meet to form electron-hole pairs, that is, excitons. The excitons in the molecular excited state are released in the form of photons, so that the organic light-emitting layer EML emits visible light. Part of the visible light emitted by the organic light-emitting layer EML is emitted from the first electrode 203 used as the anode, and the other part is transmitted to the second electrode 205 used as the cathode and is reflected by the second electrode 205, and then emitted from the first electrode 203. Among them, the light emitted by the second electrode 205 resonates with each other, and the reflected light also resonates with the light propagating directly from the organic light-emitting layer EML to the first electrode 203, thereby forming a microcavity effect and improving the luminous brightness of the light-emitting element .

It should be noted that, in order to improve the quality of light emission, the thickness or the number of layers of the above-mentioned light emitting layer 204 can be changed, and the material of each layer can also be changed. In this disclosure, the thickness and layer thickness of each layer of the light emitting layer 204 are not The number and materials are further limited.

As shown in FIG. 3 , the light-emitting module in the embodiment of the present disclosure includes a first base substrate 101 , a functional layer 201 and at least one light-emitting element sequentially disposed on the first base substrate 101 . The functional layer 201 is configured to convert the light emitted by the light-emitting element into light of a specific color, and the functional layer 201 is provided with at least 3 sub-functional layers in sequence along the direction away from the first base substrate 101 . The sub-functional layer includes a first sub-functional layer 2011 and a second sub-functional layer 2012, the first sub-functional layer 2011 and the second sub-functional layer 2012 are arranged alternately, and the refractive index of the first sub-functional layer 2011 is greater than that of the second sub-functional layer 2012 the refractive index. The first sub-functional layer 2011 and the second sub-functional layer 2012 have different refractive indices. By alternately arranging the two, the light emitted by the light-emitting element can change color when passing through the functional layer 201, thereby realizing multi-color display of the light-emitting module. It is understandable that the light emitting module may have one light emitting element or may have multiple light emitting elements, and the number of light emitting elements may be adjusted according to actual usage conditions.

In some examples, the material of the first sub-functional layer 2011 is silicon nitride or silicon oxynitride, and the refractive index of the material is between 1.6-2.0. The material of the second sub-functional layer 2012 is silicon oxide, and the refractive index of the material is 1.2-1.6. In order to realize the multiple refraction of light passing through the functional layer 201 and filter out the desired specific color light, the first sub-functional layers 2011 and the second sub-functional layers 2012 need to be arranged alternately.

Further, the functional layer 201 may include at least three sub-functional layers 201 , which include alternately arranged first sub-functional layers 2011 and second sub-functional layers 2012 . It can be understood that the functional layer 201 can have more than 3 sub-functional layers, for example: 4 sub-functional layers, two first sub-functional layers 2011 and two second sub-functional layers 2012, or there are 5 or 6 sub-functional layers. functional layer. The material of the first sub-functional layer 2011 is silicon nitride or silicon oxynitride material, so the material of the first sub-functional layer 2011 can be SiNx, and the second sub-functional layer 2012 is a silicon oxide material, so the material of the second sub-functional layer 2012 can also be For SiO2. In the embodiment of the present disclosure, the functional layer 201 has three sub-functional layers, the material of the first sub-functional layer 2011 is SiNx, and the material of the second sub-functional layer 2012 is SiO2.

Table 1:

FIG. 4 is a schematic diagram of the functional layer structure provided by the embodiment of the disclosure. As shown in FIG. 4 and Table 1, in the embodiment of the disclosure, the functional layer 201 includes three sub-functional layers, which have two first sub-functional layers 2011 and A second sub-functional layer 2012. The first sub-functional layer 2011 is interposed between the two first sub-functional layers 2011. As shown in Table 1, the thickness and refractive index of the two first sub-functional layers 2011 are the same, and their thicknesses are both 66nm. They are all SiNx film. During the experiment, molybdenum (Mo) with a thickness of 330nm was used as the second electrode 205 to conduct experiments. The color of the light after the light passes through the functional layer 201 can be changed by changing the thickness of the second sub-functional layer 2012, and finally obtained When light of the same color is emitted to the second electrode 205 , the light reflected by the second electrode 205 generates CIE coordinates of light of a specific color when passing through the functional layer 201 corresponding to the second sub-functional layer 2012 with different thicknesses.

Further, as shown in Table 1, during the experiment, the thickness of the two first sub-functional layers 2011 of the sample was maintained at 66nm, and the thickness of the metal molybdenum (Mo) layer used for reflection was 330nm. The thickness of the second sub-functional layer 2012 in the two first sub-functional layers 2011 changes the color of light. As shown in Table 1, in sample 1, the thickness of the second subfunctional layer 2012 is 50nm, and under this condition, the CIE coordinates of the color of the light reflected from the molybdenum (Mo) layer and refracted through the three subfunctional layers are: (0.4592, 0.4517), the color corresponding to this coordinate is red, and the thickness of the sample 2 is matched with the light-emitting module to make the light-emitting module emit orange-red light. In sample 2, the thickness of the second subfunctional layer 2012 is 70nm. Under this condition, the CIE coordinates of the color of the light reflected from the molybdenum (Mo) layer and refracted through the three subfunctional layers are (0.4244, 0.3227), The color corresponding to this coordinate is red, and the thickness of the sample 2 is matched with the light-emitting module, so that the light-emitting module can emit red light. In sample 5, the thickness of the second subfunctional layer 2012 is 130nm. Under this condition, the CIE coordinates of the color of the light reflected from the molybdenum (Mo) layer and refracted through the three subfunctional layers are (0.1766, 0.2477), The color corresponding to this coordinate is blue, and the thickness of the sample 5 is matched with the light-emitting module to make the light-emitting module emit blue light. In sample 7, the thickness of the second subfunctional layer 2012 is 170nm. Under this condition, the CIE coordinates of the color of the light reflected from the molybdenum (Mo) layer and refracted through the three subfunctional layers are (0.3131, 0.4256), The color corresponding to this coordinate is green, and the thickness of the sample 7 is matched with the light-emitting module to make the light-emitting module emit green light. The thickness of the second sub-functional layer 2012 in sample 3 is 90nm, and the light reflected and emitted is purple; the thickness of the second sub-functional layer 2012 in sample 4 and sample 6 is 110nm and 150nm respectively, and both reflect and emit light. It is blue light, and the second sub-functional layer 2012 in sample 8 has a thickness of 190 nm, and the reflected and emitted light is yellow. Taking three layers of sub-function layers and two layers of first sub-function layers 2011 sandwiching one layer of second sub-function layer 2012 as an example, by changing the thickness of the second sub-function layer 2012 in the middle, the thickness of the three-layer sub-function layer can be changed. The CIE coordinates of the color of the refracted light, when the aforementioned functional layer is used in the light-emitting module, the light-emitting module can emit light of a specific color. The samples in Table 1 are only some examples of the embodiments of the present disclosure. By changing the thickness of the second sub-functional layer 2012, or changing the thicknesses of the first sub-functional layer and the molybdenum (Mo) layer, 8 samples other than those in Table 1 can be obtained. The CIE coordinates of the light outside the sample are used on the display module to make it emit more kinds of light of specific colors.

It should be noted that the thickness and material of the first sub-functional layer 2011, the material of the second sub-functional layer 2012 and the material of the second electrode 205 in this disclosure can be changed or adjusted according to specific products, for example, the first sub-functional layer 2011 The silicon nitride material used is SiNx, and the silicon nitride material used in the second sub-functional layer 2012 may be SiO2. The above examples are only used to better illustrate the technical solutions in the present disclosure, and do not further limit the thicknesses of the first sub-functional layer 2011 , the second sub-functional layer 2012 and the second electrode 205 .

It can be understood that the functional layer 201 is added to the light-emitting module in the present disclosure to realize multi-color display, and there is no need to improve the organic electroluminescent diode used in the light-emitting element, so there is no need to increase the cost of the mask. At the same time, the organic electroluminescent diode can be manufactured to emit light in a single color, so the use of the functional layer 201 to change the color of the light emitting module can also simplify part of the manufacturing process of the organic electroluminescent diode.

In some examples, the functional layer 201 includes at least three sub-functional layers, the multi-layer sub-functional layer includes at least one first sub-functional layer 2011 and at least one second sub-functional layer 2012, the first sub-functional layer 2011 and the second sub-functional layer The functional layers 2012 are arranged alternately. One of the sub-functional layers closest to the light-emitting element is the first sub-functional layer. It can be understood that the first sub-functional layer 2011 with a high refractive index is preferentially disposed near the first electrode 203 , and the light reflected by the second electrode 205 first passes through the first sub-functional layer 2011 with a high refractive index.

In some examples, the functional layer 201 includes at least three sub-functional layers, the multi-layer sub-functional layer includes at least one first sub-functional layer 2011 and at least one second sub-functional layer 2012, the first sub-functional layer 2011 and the second sub-functional layer The functional layers 2012 are arranged alternately. One of the sub-functional layers closest to the light-emitting element is the second sub-functional layer. Understandably, the second sub-functional layer 2012 with a low refractive index can also be preferentially disposed near the first electrode 203 , and the light reflected by the second electrode 205 first passes through the second sub-functional layer 2012 with a low refractive index.

In some examples, the light emitting module further includes a second base substrate 102 disposed opposite to the first base substrate 101 , and a reflective layer 103 disposed on a side of the second base substrate 102 away from the light emitting element. The second electrode 205 in the light-emitting element is a reflective electrode, which is used to reflect the visible light emitted by the light-emitting layer 204 to the first base substrate 101. The second electrode 205 of each light-emitting element is away from the first base substrate 101 for light output. The reflective layer 103 is arranged in the direction, and the reflective layer 103 can be used to reflect the light that is not reflected by the second electrode 205 in each light emitting element to the first base substrate 101 for light output, reducing the The light loss caused by the second electrode 205 reflecting to the first base substrate 101 used for light output increases the effective light output of the light emitting module and improves the overall brightness of the light emitting module. In order to improve the effect of the reflective layer 103 , the orthographic projection of the reflective layer on the first substrate 101 covers the orthographic projection of the second electrode 205 of each light emitting element on the first substrate 101 . It can be understood that the reflective layer 103 entirely covers all the second electrodes 205 of each light emitting element.

It should be noted that the material of the reflective layer 103 can be the same as that of the second electrode 205, or it can be different from the material of the second electrode 205, and the material of the reflective layer 103 can be molybdenum (Mo) or aluminum (Al), silver Any one of (Ag), titanium (Ti), or any of the above alloys, in the embodiment of the present disclosure, the material of the reflective layer 103 is not further limited.

In some examples, the light-emitting module further includes a package base 202 and a package structure 301 located at the edge of the light-emitting module and disposed between the first base substrate 101 and the second base substrate 102 . The package base 202 is located on the side of the functional layer away from the first base substrate 101 ; the second electrode 205 of the light emitting element located at the edge of the light emitting module partially covers the package base 202 . The encapsulation structure 301 is used to seal the edge of the light-emitting module to prevent water and oxygen from entering the light-emitting module, causing damage to the light-emitting element or shortening the life of the light-emitting module.

In some examples, the packaging substrate 202 includes a main structure and a plurality of branch structures, and the packaging structure 301 is at least partially embedded in a gap formed between each branch structure. Through the branch structure, the overlapping area between the package structure and the package substrate is increased, so that the package structure can be more stably fixed on the light-emitting module, thereby achieving a better package effect.

It should be noted that a layer of second base substrate 102 may also be provided between the reflective layer 103 and the encapsulation structure 301, and its material may be the same as that of the first base substrate 101, and may be glass or a material with excellent light transmission effect. The material, and the materials of the first base substrate 101 and the second base substrate 102 are not further limited here.

In a second aspect, an embodiment of the present disclosure provides a light emitting device, including any one of the light emitting modules described above, the light emitting device may be a tail light, or other light emitting devices using organic electroluminescent diodes.

It can be understood that, the above embodiments are only exemplary embodiments adopted to illustrate the principles of the present invention, but the present invention is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of the present utility model, and these variations and improvements are also regarded as the protection scope of the present utility model.

Claims (14)

1. A light-emitting module, comprising a first base substrate, a functional layer and at least one light-emitting element disposed on the first base substrate; The light-emitting element is provided with a first electrode, a light-emitting layer, and a second electrode in sequence along the direction away from the first base substrate on the functional layer; The functional layer is located on the side of the first electrode close to the first base substrate, and is configured to convert the light emitted by the light-emitting element into light of a specific color; wherein, the functional layer includes N sub-functional layers arranged sequentially on the first base substrate, N≥3; The sub-functional layer includes at least one first sub-functional layer and at least one second sub-functional layer; the first sub-functional layer and the second sub-functional layer are arranged alternately; the refractive index of the first sub-functional layer greater than the refractive index of the second sub-functional layer. 2. The light-emitting module according to claim 1, wherein the material of the first sub-functional layer is silicon nitride or silicon oxynitride. 3. The light emitting module according to claim 2, characterized in that the refractive index of the material of the first sub-functional layer is 1.6-2.0. 4. The light-emitting module according to claim 1, wherein the material of the second sub-functional layer is silicon oxide. 5. The light emitting module according to claim 4, wherein the refractive index of the material of the second sub-functional layer is 1.2-1.6. 6. The light-emitting module according to claim 1, wherein the functional layer includes N sub-functional layers, N≥3; one of the sub-functional layers closest to the light-emitting element is the The first sub-functional layer. 7. The light-emitting module according to claim 1, wherein the functional layer includes N sub-functional layers, N≥3; one of the sub-functional layers closest to the light-emitting element is the The second sub-functional layer. 8. The light-emitting module according to claim 1, wherein when the light output color of the light-emitting module is orange, the functional layer includes two layers of the first sub-functional layer and a The second sub-functional layer between the two layers of the first sub-functional layer; the thickness of the first sub-functional layer is 66nm; the thickness of the second sub-functional layer is 50nm. 9. The light-emitting module according to claim 1, wherein when the color of the light emitted by the light-emitting module is red, the functional layer includes two layers of the first sub-functional layer and the first sub-functional layer sandwiched between the The second sub-functional layer between the two first sub-functional layers; the thickness of the first sub-functional layer is 66nm; the thickness of the second sub-functional layer is 70nm. 10. The lighting module according to claim 1, wherein the first electrode is a transparent electrode; the second electrode is a reflective electrode. 11. The light-emitting module according to claim 1, characterized in that, the light-emitting module further comprises a second base substrate disposed opposite to the first base substrate, and a second base substrate disposed on the second substrate a reflective layer on the side of the substrate away from the light-emitting element; The orthographic projection of the reflective layer on the first base substrate covers the orthographic projection of the second electrode of each light emitting element on the first base substrate. 12. The lighting module according to claim 11, characterized in that, the lighting module further comprises The packaging substrate and packaging structure; The packaging base is located on the side of the functional layer away from the first base substrate; the second electrode of the light-emitting element located at the edge of the light-emitting module is partially covered on the packaging base; The encapsulation structure is used to seal the edge of the light emitting module. 13. The light-emitting module according to claim 12, wherein the encapsulation substrate comprises a main body structure and a plurality of branch structures; the encapsulation structure is at least partially embedded in a gap formed between each of the branch structures. 14. A light emitting device, characterized by comprising the light emitting module according to any one of claims 1-13.

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