CN221057454U

CN221057454U - Light emitting device

Info

Publication number: CN221057454U
Application number: CN202322800948.2U
Authority: CN
Inventors: 蒋剑涛; 童鹍
Original assignee: Shenzhen Aitushi Innovation Technology Co ltd
Current assignee: Shenzhen Aitushi Innovation Technology Co ltd
Priority date: 2023-10-18
Filing date: 2023-10-18
Publication date: 2024-05-31
Anticipated expiration: 2033-10-18

Abstract

The utility model provides a light-emitting device, which comprises a substrate, a transparent cover plate and a fluorescent structure, wherein the transparent cover plate is arranged on the substrate; a light-emitting region is formed on the substrate, a plurality of light-emitting elements are arranged in the light-emitting region of the substrate, and the plurality of light-emitting elements comprise a plurality of first light-emitting elements which emit blue light; the transparent cover plate is arranged on the light emitting side of the substrate and covers the light emitting area, a plurality of first mounting grooves are formed in the surface of one side, facing the substrate, of the transparent cover plate, the first mounting grooves correspond to the first light emitting elements one by one, and the notch of each first mounting groove completely covers the corresponding first light emitting element; the fluorescent structure comprises a plurality of fluorescent layers, and each fluorescent layer is correspondingly coated in one first mounting groove; therefore, the coating difficulty of the fluorescent layer is reduced, so that the coating efficiency of the fluorescent layer is improved, and the packaging efficiency of the light-emitting device is further improved; and the risk of coating the fluorescent layer to adjacent light emitting elements is reduced, thereby improving the product yield and reducing the loss and cost.

Description

Light emitting device

Technical Field

The utility model relates to the technical field of illumination, in particular to a light-emitting device.

Background

Multicolor LED light sources are common lighting devices, and are generally integrated with LED chips with various colors, so that not only can rich colors be displayed, but also better color uniformity and energy-saving effect are achieved, and the multicolor LED light sources can also synthesize the LED chips with various colors, so that more colors of light are generated. The multi-color LED light source has wide application prospect in the fields of illumination, decoration, display and the like. In the existing multicolor LED light source processing procedure, fluorescent powder glue with different colors is uniformly coated on the surfaces of all blue LED chips, and the chip size is small, the surface is smooth, and the fluidity of the fluorescent powder glue is large, so that the requirements on equipment precision, glue viscosity and the level of operators are high during coating, and a fluorescent powder layer is very easy to coat on adjacent LED chips, so that the risks of color deviation and light color parameter drift of the multicolor LED light source are increased, and the yield is reduced.

Disclosure of utility model

The embodiment of the utility model provides a light-emitting device, which can reduce the coating difficulty of a fluorescent layer, improve the packaging efficiency and the product qualification rate of the light-emitting device, and reduce the loss and the cost.

In a first aspect, embodiments of the present utility model provide a light emitting device including:

A substrate, on which a light emitting region is formed, a plurality of light emitting elements are disposed in the light emitting region of the substrate, and the plurality of light emitting elements include a plurality of first light emitting elements that emit blue light;

The transparent cover plate is arranged on the light emitting side of the substrate and covers the light emitting area, a plurality of first mounting grooves are formed in the surface of one side, facing the substrate, of the transparent cover plate, the first mounting grooves correspond to the first light emitting elements one by one, and the notch of each first mounting groove completely covers the corresponding first light emitting element; and

And the fluorescent structure comprises a plurality of fluorescent layers, and each fluorescent layer is correspondingly coated in one first mounting groove.

In an embodiment, the light emitting device further comprises:

The annular light-transmitting films are coated on the outer side of each light-emitting element, so that light emitted by the light-emitting elements can partially enter the annular light-transmitting films and point to the substrate from the transparent cover plate, and the outer walls of the annular light-transmitting films are arranged in a shrinking manner; and

The reflecting layer is arranged between the base plate and the transparent cover plate and is filled between two adjacent annular light-transmitting films so as to reflect light rays in the annular light-transmitting films, so that at least part of the light rays can be emitted from the annular light-transmitting films to the transparent cover plate.

In an embodiment, the material of the annular light-transmitting film includes silica gel; and/or the number of the groups of groups,

The refractive index of the annular light-transmitting film is n ₁, wherein n ₁ is more than or equal to 1.4 and less than or equal to 1.6.

In an embodiment, the plurality of light emitting elements further includes a plurality of second light emitting elements disposed in a flip-chip manner, and the second light emitting elements are disposed in parallel with the first light emitting elements at intervals.

In an embodiment, a plurality of second mounting grooves are formed in a surface of the transparent cover plate, facing the substrate, and the second mounting grooves correspond to the second light-emitting elements one by one, the notch of each second mounting groove completely covers the corresponding second light-emitting element, and a silica gel layer is coated in each second mounting groove.

In an embodiment, the silica gel layer is flush with the notch corresponding to the second mounting groove.

In an embodiment, the difference of the length dimensions of the first light emitting element and the notch of the first mounting groove in the first direction and the second direction is Δl ₁ and Δl ₂, respectively, where 0.1mm is less than or equal to Δl ₁≤0.3mm,0.1mm≤ΔL₂ is less than or equal to 0.3mm; and/or the number of the groups of groups,

The difference of the length dimensions of the notch of the second light-emitting element and the notch of the second mounting groove in the first direction and the second direction is delta L ₃ and delta L ₄ respectively, wherein delta L ₃≤0.3mm,0.1mm≤ΔL₄ is more than or equal to 0.1mm and less than or equal to 0.3mm.

In one embodiment, the depth of the first mounting groove is D ₁, wherein D ₁ is more than or equal to 0.1mm and less than or equal to 0.5mm; and/or the number of the groups of groups,

The depth of the second mounting groove is D ₂, wherein D ₂ is more than or equal to 0.1mm and less than or equal to 0.5mm.

In an embodiment, the first mounting groove and the second mounting groove have the same groove depth.

In an embodiment, the colors of the light rays of at least two second light emitting elements are different among the plurality of second light emitting elements.

In one embodiment, at least two of the fluorescent layers are different in color.

In an embodiment, each fluorescent layer is disposed flush with a notch of the corresponding first mounting groove.

In one embodiment, the thickness T of the transparent cover plate is equal to or less than 0.5mm and equal to or less than 2mm; and/or the number of the groups of groups,

The transparent cover plate has a shape including a circle or a polygon.

In an embodiment, an orthographic projection area of the transparent cover plate on the substrate is S ₁;

The area of the light-emitting area is S ₂;

Wherein S ₁-S₂≥1mm².

The embodiment of the utility model has the beneficial effects that:

In an embodiment of the present utility model, a plurality of first light emitting elements are disposed in a light emitting region of the substrate; a transparent cover plate is arranged on the light-emitting side of the substrate, the transparent cover plate covers the light-emitting area, a plurality of first mounting grooves are formed in the surface of one side, facing the substrate, of the transparent cover plate, a fluorescent layer is coated in each first mounting groove, the fluorescent layer is excited by blue light emitted by the first light-emitting element, so that the fluorescent layer emits fluorescent light with corresponding colors, and the light-emitting function of the light-emitting device is realized; meanwhile, as the first mounting groove is formed in the transparent cover plate, the fluorescent layer is coated in the first mounting groove, so that the coating difficulty of the fluorescent layer is reduced, the requirements on equipment precision, glue viscosity and the level of operators are reduced, the coating efficiency of the fluorescent layer is improved, and the packaging efficiency of the light-emitting device is further improved; and the risk of coating the fluorescent layer to adjacent light emitting elements is reduced, thereby improving the product yield and reducing the loss and cost.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of a light emitting device according to an embodiment of the present utility model;

FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;

FIG. 3 is an enlarged schematic view of part B in FIG. 2;

FIG. 4 is a schematic view of the transparent cover plate in FIG. 2;

FIG. 5 is an enlarged schematic view of part C of FIG. 1;

FIG. 6 is an enlarged schematic view of portion D of FIG. 1;

FIG. 7 is a process diagram of a dispenser for applying phosphor layers according to an embodiment of the present utility model;

FIG. 8 is a process diagram of a printer for coating a phosphor layer according to an embodiment of the present utility model.

The names of the corresponding components in the figures are: the light emitting device comprises a light emitting device 100, a substrate 1, a light emitting area 1a, a light emitting element 2, a first light emitting element 21, a second light emitting element 22, a transparent cover plate 3, a first mounting groove 31, a second mounting groove 32, a fluorescent structure 4, a fluorescent layer 41, an annular light transmitting film 5, a reflecting layer 6 and a silica gel layer 7.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to fall within the scope of the utility model. Furthermore, it should be understood that the detailed description is presented herein for purposes of illustration and description only, and is not intended to limit the utility model. In the present utility model, unless otherwise indicated, terms of orientation such as "upper" and "lower" are used to generally refer to the upper and lower positions of the device in actual use or operation, and specifically the orientation of the drawing figures; while "inner" and "outer" are for the outline of the device.

In a first aspect, embodiments of the present utility model provide a light emitting device. Fig. 1 is a schematic structural diagram of a light emitting device according to an embodiment of the present utility model; FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1; FIG. 3 is an enlarged schematic view of part B in FIG. 2; FIG. 4 is a schematic view of the transparent cover plate in FIG. 2; FIG. 5 is an enlarged schematic view of part C of FIG. 1; FIG. 6 is an enlarged schematic view of portion D of FIG. 1; FIG. 7 is a process diagram of a dispenser for applying phosphor layers according to an embodiment of the present utility model; FIG. 8 is a process diagram of a printer for coating a phosphor layer according to an embodiment of the present utility model.

Referring to fig. 1 to 4, a light emitting device 100 includes a substrate 1, a transparent cover plate 3, and a fluorescent structure 4; a light emitting region 1a is formed on the substrate 1, a plurality of light emitting elements 2 are provided in the light emitting region 1a of the substrate 1, and a plurality of first light emitting elements 21 emitting blue light are included in the plurality of light emitting elements 2; the transparent cover plate 3 is arranged on the light emitting side of the substrate 1 and covers the light emitting area 1a, a plurality of first mounting grooves 31 are formed in the surface of one side, facing the substrate 1, of the transparent cover plate 3, the first mounting grooves 31 are in one-to-one correspondence with the first light emitting elements 21, and the notch of each first mounting groove 31 completely covers the corresponding first light emitting element 21; the fluorescent structure 4 includes a plurality of fluorescent layers 41, and each fluorescent layer 41 is correspondingly coated in one of the first mounting grooves 31.

In the embodiment of the present utility model, a plurality of first light emitting elements 21 are provided in the light emitting region 1a of the substrate 1; a transparent cover plate 3 is arranged on the light-emitting side of the substrate 1, the transparent cover plate 3 covers the light-emitting area 1a, a plurality of first mounting grooves 31 are formed in the surface of the transparent cover plate 3 facing the substrate 1, a fluorescent layer 41 is coated in each first mounting groove 31, and the fluorescent layer 41 is excited by blue light emitted by the first light-emitting element 21, so that the fluorescent layer 41 emits fluorescent light with a corresponding color, and the light-emitting function of the light-emitting device 100 is realized; meanwhile, as the first mounting groove 31 is formed in the transparent cover plate 3, the fluorescent layer 41 is coated in the first mounting groove 31, so that the coating difficulty of the fluorescent layer 41 is reduced, the coating efficiency of the fluorescent layer 41 is improved, and the packaging efficiency of the light-emitting device 100 is further improved; and the risk of applying the fluorescent layer 41 to the adjacent light emitting element 2 is reduced, thereby improving the product yield and reducing the loss and cost.

By providing the first mounting groove 31, the fluorescent layer 41 is coated in the first mounting groove 31, and there is no concern that the fluorescent layer 41 flows onto the adjacent light emitting element 2, so that the fluorescent layer 41 can be formed by dispensing, printing or spraying, thereby reducing the requirement for the equipment accuracy. Referring to fig. 7, fig. 7 is a process diagram of a dispenser for applying a fluorescent layer according to an embodiment of the utility model; referring to fig. 8, fig. 8 is a process diagram of a printer for coating a fluorescent layer according to an embodiment of the utility model.

The present utility model is not limited to the specific form of the light emitting element 2, and in some embodiments, the light emitting element 2 is provided as an LED chip.

In order to ensure flatness of the surface of the transparent cover plate 3 facing the side of the substrate 1, the fluorescent layer 41 is disposed flush with the notch corresponding to the first mounting groove 31.

In order to improve the light emitting efficiency of the light emitting device 100, referring to fig. 2 and 3, the light emitting device 100 further includes an annular light transmitting film 5 and a reflective layer 6; the annular light-transmitting film 5 is coated on the outer side of each light-emitting element 2, so that light emitted by the light-emitting elements 2 can partially enter the annular light-transmitting film 5, and the outer wall of the annular light-transmitting film 5 is arranged in a shrinking manner in the direction of pointing to the substrate 1 from the transparent cover plate 3; the reflecting layer 6 is disposed between the substrate 1 and the transparent cover plate 3 and is filled between two adjacent annular transparent films 5 to reflect light in the annular transparent films 5, so that at least part of the light can exit from the annular transparent films 5 to the transparent cover plate 3.

Taking an LED chip as an example, light rays emitted by the LED chip are emitted through a sapphire substrate, the refractive index of a sapphire wafer is far greater than that of air, and the larger the refractive index of a medium is, the smaller the critical angle of total reflection is; when light is injected into the air from the sapphire substrate, the critical angle is too small, so that partial light can generate total reflection at the interface between the sapphire substrate and the air and cannot be refracted out. The annular light-transmitting film 5 is coated on the outer side of the light-emitting element 2, and the refractive index of the annular light-transmitting film 5 is larger than that of air, so that the critical angle of total reflection when light enters the annular light-transmitting film 5 from the sapphire substrate is increased, and more light can be refracted into the annular light-transmitting film 5; after entering the annular light-transmitting film 5, the light is transmitted to the reflecting layer 6, and if the surface of the reflecting layer 6, which is in contact with the outer wall of the annular light-transmitting film 5, is vertically arranged, most of the light can be re-reflected into the sapphire substrate and is partially absorbed by substances in the LED chip; however, in this embodiment, the outer wall of the annular light-transmitting film 5 is disposed in a retracted manner, so that the surface of the reflective layer 6 contacting the outer wall of the annular light-transmitting film 5 is disposed in an inclined manner, and after the light reaches the reflective layer 6, the light is reflected by the inclined surface, so that the light can be transmitted to the transparent cover plate 3, and the light is prevented from being reflected back to the sapphire substrate, and thus, more light can be emitted to the transparent cover plate 3 by disposing the annular light-transmitting film 5 and the reflective layer 6, thereby improving the light-emitting efficiency of the light-emitting device 100.

It should be noted that the specific form of the reflective layer 6 is not limited in the present utility model, and in one embodiment, the reflective layer 6 is configured as a high-reflectivity white adhesive film; the high-reflectivity white adhesive film has excellent high-reflectivity performance; and can have good adhesion with various materials such as glass, metal, polymer back plate, etc., and maintain for a long period of time, thereby improving the stability of the reflective layer 6.

In the present utility model, the material of the annular light-transmitting film 5 includes silica gel.

In the present utility model, the refractive index of the annular light-transmitting film 5 is n ₁, where 1.4.ltoreq.n ₁.ltoreq.1.6.

It should be noted that the above two technical features may be alternatively or simultaneously arranged, specifically, the material of the annular light-transmitting film 5 includes silica gel, and the refractive index of the annular light-transmitting film 5 is n ₁, where n ₁ is 1.4 or more and 1.6 or less; in the above embodiment, it is mentioned that the annular light-transmitting film 5 is coated on the outer side of the light-emitting element 2, so that the critical angle of total reflection occurs when light enters the annular light-transmitting film 5 from the sapphire substrate is increased, so that more light can be refracted into the annular light-transmitting film 5, and by providing the annular light-transmitting film 5 of silica gel, and setting the refractive index between 1.4 and 1.6, light can be refracted into the annular light-transmitting film 5 from the sapphire substrate to the greatest extent, and the light-emitting efficiency of the light-emitting device 100 is further improved.

Also, to enhance the reflective effect of the reflective layer 6, in some embodiments, the diffuse reflectance of the reflective layer 6 is greater than 98%; in this way, the light can be reflected in different directions, so that the probability that the light enters the transparent cover plate 3 from the annular light-transmitting film 5 is larger, and the luminous efficiency of the luminous device 100 is improved.

In order for the light-emitting device 100 to meet the requirements of light-emitting power on the premise of realizing multicolor light emission; the plurality of light emitting elements 2 further includes a plurality of second light emitting elements 22 flip-chip mounted, and the second light emitting elements 22 are arranged side by side with the first light emitting elements 21 at intervals. It will be appreciated that the first light emitting element 21 emits blue light, and colored light is emitted by exciting the fluorescent layer 41; the second light emitting element 22 is provided as a color light emitting element 2.

For example, the first light emitting element 21 may be provided as a front-mounted chip, and the second light emitting element 22 may be provided as a flip-chip, the front-mounted chip having the structure: the structure comprises an electrode, a P-type semiconductor layer, a light-emitting layer, an N-type semiconductor layer and a substrate from top to bottom, wherein heat generated at a PN junction in the structure can be conducted to a heat sink through a sapphire substrate; the flip chip has the structure that: the light-emitting diode comprises a sapphire substrate, an N-type semiconductor layer, a light-emitting layer, a P-type semiconductor layer and an electrode from top to bottom in sequence; compared with a forward chip, the flip chip structure has the advantages that heat generated at the PN junction can be directly conducted to the heat sink without passing through the substrate, so that the heat dissipation performance is good, and the luminous efficiency and the reliability of the chip are higher; in the flip chip structure, the P electrode and the N electrode are both arranged on the bottom surface, so that shielding of emergent light is avoided, and the light-emitting efficiency of the chip is high; therefore, the first light-emitting element 21 and the second light-emitting element 22 are provided, so that not only the multicolor light-emitting requirement of the light-emitting device 100 can be satisfied, but also the light-emitting power of the light-emitting device 100 can be reduced.

It should be noted that, the specific number and specific arrangement of the first light emitting element 21 and the second light emitting element 22 are not limited in the present utility model, and the user may combine the first light emitting element 21 and the second light emitting element 22 according to specific display requirements and power requirements.

Meanwhile, the specific color of the fluorescent layers 41 is not limited, the colors of the fluorescent layers 41 can be the same, and the colors of the fluorescent layers 41 can be different; in one embodiment, the phosphor layer 41 is provided with three colors: red fluorescent layer 41, lemon fluorescent layer 41, and amber fluorescent layer 41; the user can select the display device according to the actual display requirement.

In addition, the specific color of the second light emitting element 22 is not limited in the present utility model, the light emitting colors of the plurality of second light emitting elements 22 may be the same, and the light emitting colors of the plurality of second light emitting elements 22 may be different; in one embodiment, the plurality of second light emitting elements 22 are provided with three colors: flip blue light chip, flip green light chip and flip green light chip; the user can select the display device according to the actual display requirement.

In order to improve the uniformity of the light emitted from the light emitting device 100, in an embodiment, referring to fig. 4, a plurality of second mounting grooves 32 are formed on a surface of the transparent cover plate 3 facing the substrate 1, the plurality of second mounting grooves 32 are in one-to-one correspondence with the plurality of second light emitting elements 22, the notch of each second mounting groove 32 completely covers the corresponding second light emitting element 22, and a silica gel layer 7 is coated in each second mounting groove 32. Through setting up silica gel layer 7 for take place the refraction when the light that second luminescent element 22 was emergent from the silica gel layer entering transparent cover plate 3, thereby make the light have more exit direction, play the light mixing effect, and then improve the homogeneity of light-emitting device 100 light.

In order to ensure the flatness of the surface of the transparent cover plate 3 facing the side of the substrate 1, the silica gel layer 7 is arranged flush with the notch of the corresponding second mounting groove 32.

In the present utility model, referring to fig. 5, the difference between the length dimensions of the first light emitting element 21 and the slot opening of the first mounting groove 31 in the first direction F1 and the second direction F2 is Δl ₁ and Δl ₂, respectively, wherein Δl ₁≤0.3mm,0.1mm≤ΔL₂ is greater than or equal to 0.1mm and less than or equal to 0.3mm.

In the present utility model, referring to fig. 6, the difference between the length dimensions of the slots of the second light emitting element 22 and the second mounting groove 32 in the first direction F1 and the second direction F2 is Δl ₃ and Δl ₄, respectively, wherein Δl ₃≤0.3mm,0.1mm≤ΔL₄ is greater than or equal to 0.1mm and less than or equal to 0.3mm.

In order to improve the light extraction efficiency, the first mounting groove 31 needs to completely cover the first light emitting element 21, and the second mounting groove 32 needs to completely cover the second light emitting element, so that the size of the notch of the first mounting groove 31 is larger than that of the first light emitting element, and the size of the notch of the second mounting groove 32 is larger than that of the second light emitting element; however, considering the interval between the light emitting elements 2 and the overall size of the light emitting device 100, setting Δl ₁、ΔL₂、ΔL₃ and Δl ₄ can avoid the excessive interval between two adjacent light emitting elements 2, so that the arrangement of the elements of the light emitting device 100 is more reasonable and the structure is more compact.

The two technical features may be alternatively or simultaneously set.

In the present utility model, further referring to FIG. 4, the first mounting groove 31 has a depth D ₁, wherein 0.1mm < D ₁ < 0.5mm.

In the present utility model, further referring to FIG. 4, the second mounting groove 32 has a depth D ₂, where 0.1mm < D ₂ < 0.5mm.

By setting the groove depths D ₁ and D ₂, the fluorescent layer 41 can be prevented from flowing out of the notch of the first mounting groove 31 and the silica gel can be prevented from flowing out of the notch of the second mounting groove 32, so that the dispensing difficulty is reduced; and it is possible to avoid waste caused by the excessive thickness of the fluorescent layer 41 and the silica gel layer due to the too large depth of the first and second mounting grooves 31 and 32.

It is understood that the specifications of the first mounting groove 31 and the second mounting groove 32 may be the same or different; however, since the first mounting groove 31 and the second mounting groove 32 are provided on the same side surface of the transparent cover plate 3, the transparent cover plate 3 can be simultaneously processed by providing the first mounting groove 31 to be the same size and depth as the second mounting groove 32, thereby simplifying the processing process and improving the manufacturing efficiency of the light emitting device 100.

The thickness of the transparent cover plate 3 is not limited; in some embodiments, the thickness T of the transparent cover plate 3 is 0.5 mm.ltoreq.T.ltoreq.2 mm.

The utility model does not limit the material of the transparent cover plate 3; in some embodiments, the transparent cover plate 3 is made of one of glass, quartz and sapphire wafers.

The utility model does not limit the shape of the transparent cover plate 3; in some embodiments, the shape of the transparent cover plate 3 includes a circle or a polygon.

It should be noted that the above three technical features may be alternatively set, or simultaneously set.

In one embodiment, the transparent cover plate 3 is made of sapphire wafers; the transparent cover plate 3 is manufactured by adopting the sapphire wafer, the transparent cover plate 3 is used as the substrate 1 of the fluorescent layer 41 and the silica gel layer, and particles in the sapphire wafer can cause light rays passing through the transparent cover plate 3 to be diffusely reflected, so that the light mixing effect is achieved, and the light emitting of the light emitting device is more uniform; and the sapphire wafer has higher coefficient of thermal conductivity, can bring better radiating effect for fluorescent layer 41 in the use.

The orthographic projection area of the transparent cover plate 3 on the substrate 1 is S ₁; the area of the light-emitting area 1a is S ₂; wherein S ₁-S₂≥1mm²; in this way, it is ensured that the transparent cover plate 3 can completely cover the light emitting area 1a; meanwhile, as the transparent cover plate 3 is large enough, the light rays emitted by each light-emitting element 2 can be subjected to diffuse reflection, so that the light mixing effect is further improved, and the light emitting of the light emitting device is more uniform.

In the embodiment of the present utility model, the light emitting device 100 further includes a circuit board assembly disposed on the substrate 1, and the plurality of light emitting elements 2 are electrically connected to the circuit board assembly.

Based on the above-described embodiment, "the plurality of light emitting elements 2 includes the plurality of first light emitting elements 21 and the plurality of second light emitting elements 22, and among the plurality of fluorescent layers 41 corresponding to the plurality of first light emitting elements 21, the red fluorescent layer 41, the lemon fluorescent layer 41, and the amber fluorescent layer 41 are included; the plurality of second light emitting elements 22 include a flip blue light chip, a flip green light chip, and a flip green light chip ", and the circuit board assembly is provided with at least six groups of conductive loops, and the six groups of conductive loops are correspondingly connected with the six groups of LED chips to respectively control the opening and closing of the six groups of LED chips.

Meanwhile, in order to facilitate the mounting of the plurality of light emitting elements 2, a bead pad for solder mounting of the plurality of first light emitting elements 21 and a lead pad for solder mounting of the plurality of second light emitting elements 22 are further provided on the substrate 1.

The foregoing has outlined rather broadly the more detailed description of embodiments of the utility model, wherein the principles and embodiments of the utility model are explained in detail using specific examples, the above examples being provided solely to facilitate the understanding of the method and core concepts of the utility model; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in light of the ideas of the present utility model, the present description should not be construed as limiting the present utility model.

Claims

1. A light emitting device (100), characterized by comprising:

A substrate (1), wherein a light emitting region (1 a) is formed on the substrate (1), a plurality of light emitting elements (2) are arranged in the light emitting region (1 a) of the substrate (1), and the plurality of light emitting elements (2) comprise a plurality of first light emitting elements (21) which emit blue light;

The transparent cover plate (3) is arranged on the light emitting side of the substrate (1) and covers the light emitting area (1 a), a plurality of first mounting grooves (31) are formed in the surface of one side, facing the substrate (1), of the transparent cover plate (3), the first mounting grooves (31) are in one-to-one correspondence with the first light emitting elements (21), and the notch of each first mounting groove (31) completely covers the corresponding first light emitting element (21); and

Fluorescent structure (4), the fluorescent structure (4) comprises a plurality of fluorescent layers (41), and each fluorescent layer (41) is correspondingly coated in one first mounting groove (31).

2. The light emitting device (100) according to claim 1, wherein the light emitting device (100) further comprises:

The annular light-transmitting films (5) are coated on the outer side of each light-emitting element (2), so that light emitted by the light-emitting elements (2) can partially enter the annular light-transmitting films (5), and the outer walls of the annular light-transmitting films (5) are arranged in a shrinking manner in the direction of pointing to the substrate (1) from the transparent cover plate (3); and

The reflecting layer (6) is arranged between the base plate (1) and the transparent cover plate (3), and is filled between two adjacent annular light-transmitting films (5) so as to reflect light rays in the annular light-transmitting films (5), so that at least part of the light rays can be emitted from the annular light-transmitting films (5) to the transparent cover plate (3).

3. The light emitting device (100) according to claim 2, wherein the material of the annular light transmissive film (5) comprises silica gel; and/or the number of the groups of groups,

The refractive index of the annular light-transmitting film (5) is n ₁, wherein n ₁ is more than or equal to 1.4 and less than or equal to 1.6.

4. The light-emitting device (100) according to claim 1, further comprising a plurality of second light-emitting elements (22) in a flip-chip arrangement, wherein the second light-emitting elements (22) are arranged in a side-by-side spacing from the first light-emitting elements (21).

5. The light-emitting device (100) according to claim 4, wherein a plurality of second mounting grooves (32) are formed in a side surface of the transparent cover plate (3) facing the substrate (1), the plurality of second mounting grooves (32) are in one-to-one correspondence with the plurality of second light-emitting elements (22), the notch of each second mounting groove (32) completely covers the corresponding second light-emitting element (22), and a silica gel layer (7) is coated in each second mounting groove (32).

6. The light emitting device (100) according to claim 5, wherein the silicone layer (7) is arranged flush with a notch corresponding to the second mounting groove (32).

7. The light emitting device (100) according to claim 5, wherein a difference in length dimension between the first light emitting element (21) and the notch of the first mounting groove (31) in the first direction and the second direction corresponds to Δl ₁ and Δl ₂, respectively, wherein 0.1mm ∈Δl ₁≤0.3mm,0.1mm≤ΔL₂ ∈0.3mm; and/or the number of the groups of groups,

The difference of the length dimensions of the second light-emitting element (22) and the notch of the second mounting groove (32) in the first direction and the second direction is delta L ₃ and delta L ₄ respectively, wherein delta L ₃≤0.3mm,0.1mm≤ΔL₄ is more than or equal to 0.1mm and less than or equal to 0.3mm.

8. The light emitting device (100) of claim 5, wherein the first mounting groove (31) has a depth D ₁, wherein 0.1mm ∈d ₁ ∈0.5mm; and/or the number of the groups of groups,

The depth of the second mounting groove (32) is D ₂, wherein D ₂ is more than or equal to 0.1mm and less than or equal to 0.5mm.

9. The light emitting device (100) according to claim 8, wherein the first mounting groove (31) and the second mounting groove (32) have the same groove depth.

10. The light emitting device (100) according to claim 4, wherein at least two of the second light emitting elements (22) differ in light color among the plurality of second light emitting elements (22).

11. The light emitting device (100) according to claim 1, wherein at least two of the phosphor layers (41) are different in color among the plurality of phosphor layers (41).

12. The light emitting device (100) according to claim 1, wherein each of the fluorescent layers (41) is arranged flush with a notch of the corresponding first mounting groove (31).

13. The light emitting device (100) according to claim 1, wherein the thickness T of the transparent cover plate (3) is 0.5mm +.t +.2 mm; and/or the number of the groups of groups,

The transparent cover plate (3) has a circular or polygonal shape.

14. The light emitting device (100) according to claim 1, wherein the orthographic projection area of the transparent cover plate (3) on the substrate (1) is S1;

the area of the light-emitting area (1 a) is S2;

Wherein S1-S2 is more than or equal to 1mm ².