CN113757572A

CN113757572A - Light emitting device, lamp and method for manufacturing light emitting device

Info

Publication number: CN113757572A
Application number: CN202010472030.8A
Authority: CN
Inventors: 吉德留斯·斯鲁奥吉斯
Original assignee: Top International Enterprise Ltd
Current assignee: Top International Enterprise Ltd
Priority date: 2020-05-29
Filing date: 2020-05-29
Publication date: 2021-12-07

Abstract

The present disclosure relates to a light emitting device, a luminaire and a method of manufacturing a light emitting device, wherein the light emitting device comprises: a circuit substrate; a plurality of light emitting cells arranged on the circuit substrate in one or more directions; a cover layer arranged to extend in the one or more directions on the circuit substrate and cover the plurality of light emitting units, wherein each of the light emitting units includes a light source located at a central position of the light emitting unit, and a lens cover arranged to surround the light source, wherein an incident surface of the lens is arranged to surround the light source so as to receive incident light from the light source, and the lens cover is arranged to be located between the cover layer and the lens so as to surround an exit surface of the lens. The light-emitting device according to the present disclosure can effectively avoid problems in packaging, storage, transportation, cleaning, etc. caused by the lens protruding out of the outer surface of the light-emitting device.

Description

Light emitting device, lamp and method for manufacturing light emitting device

Technical Field

The present disclosure relates generally to the field of lighting. More particularly, the present disclosure relates to a light emitting device, a luminaire and a method of manufacturing a light emitting device.

Background

In daily life, the application of lighting devices has become very widespread. Currently common lighting devices have multiple lights or light-transmissive components disposed outside of the lighting device and exposed to the air. However, a light-emitting device having such an arrangement may present difficulties and safety concerns in its packaging, storage, transportation, installation, and the like. In addition, the edges of the protruding lights or light-transmitting elements are not easily wiped, easily causing the accumulation of dust and dirt that affects hygiene and aesthetics. Further, the protruding light emitting body or the light transmitting member is easily worn or damaged, thereby affecting the light effect.

Disclosure of Invention

In view of the above-mentioned technical problems, the technical solution of the present disclosure provides, in various aspects, a light emitting device, a lamp, and a method of manufacturing the light emitting device.

According to a first aspect of the present disclosure, there is provided a light emitting device comprising: a circuit substrate; a plurality of light emitting cells arranged on the circuit substrate in one or more directions; a cover layer arranged to extend in the one or more directions on the circuit substrate and cover the plurality of light emitting units, wherein each of the light emitting units includes a light source located at a central position of the light emitting unit, and a lens cover arranged to surround the light source, wherein an incident surface of the lens is arranged to surround the light source so as to receive incident light from the light source, and the lens cover is arranged to be located between the cover layer and the lens so as to surround an exit surface of the lens.

According to one embodiment of the present disclosure, the circuit substrate is in a shape of a stripe, and a plurality of the light emitting units are adjacently arranged at intervals along an extending direction of the stripe.

According to another embodiment of the disclosure, there is a gap between the exit face of the lens and the lens cover to form a first air gap.

According to yet another embodiment of the present disclosure, there is a spacing between the entrance face of the lens and the light source to form a second air gap.

According to one embodiment of the present disclosure, the incident surface of the lens includes a concave portion having a curved surface structure, the exit surface of the lens includes a convex portion having a curved surface, a distance exists between the convex portion and the lens cover to form the first air gap, and a distance exists between the concave portion and the light source to form the second air gap.

According to another embodiment of the present disclosure, the incident surface of the lens includes a concave portion having a straight structure, the exit surface of the lens includes a convex portion having a curved surface, a distance exists between the convex portion and the lens cover to form the first air gap, and a distance exists between the concave portion and the light source to form the second air gap.

According to yet another embodiment of the present disclosure, the cover layer is made of a potting adhesive, and the potting adhesive has optical properties of being light-transmissive or semi-light-transmissive.

According to one embodiment of the present disclosure, the cover layer comprises a first cover layer and a second cover layer, the first cover layer is arranged extending along the top of the lens cover and the second cover layer is arranged extending along both sides of the lens cover, wherein the first cover layer has optical properties of being light-transmissive and the second cover layer has optical properties of being light-opaque or light-semi-transmissive.

According to another embodiment of the present disclosure, the apparatus further comprises a tray for placing the circuit substrate, wherein the cover layer is filled in the tray and integrally formed with the tray to have a flat outer surface.

According to a further embodiment of the disclosure, the lens is made of at least one material of polymethylmethacrylate, PMMA, polycarbonate, PC, ABS resin, epoxy, silicone, glass, the lens cover is made of a rigid or elastic polymer and the cover layer is made of at least one material of epoxy, silicone, polyurethane, PU.

According to one embodiment of the present disclosure, the light source is an LED lamp regularly arranged on the circuit substrate, which is a flexible circuit board or a printed circuit board.

According to a second aspect of the present disclosure, there is provided a luminaire comprising a power supply device and a light emitting device, wherein the light emitting device comprises: a circuit board electrically connected to the power supply device; a plurality of light emitting cells arranged on the circuit substrate in one or more directions; a cover layer arranged to extend in the one or more directions on the circuit substrate and cover the plurality of light emitting units, wherein each of the light emitting units includes a light source located at a central position of the light emitting unit, and a lens cover arranged to surround the light source, wherein an incident surface of the lens is arranged to surround the light source so as to receive incident light from the light source, and the lens cover is arranged to be located between the cover layer and the lens so as to surround an exit surface of the lens.

According to a third aspect of the present disclosure, there is provided a method for manufacturing a light emitting device, comprising: providing a circuit substrate on which light emitting units arranged in one or more directions are arranged; and disposing a cover layer on the circuit substrate, the cover layer extending in the one or more directions and covering the plurality of light emitting cells, wherein each of the light emitting cells includes a light source located at a central position of the light emitting cell and a lens cover disposed around the light source, the method further comprising: arranging an incident surface of the lens to surround the light source so as to receive incident light from the light source; and arranging the lens cover to be located between the cover layer and the lens so as to surround the exit face of the lens.

From the above description of the technical solutions and embodiments of the present disclosure, those skilled in the art can understand that each light emitting unit in the light emitting device of the present disclosure is provided with a lens cover, which can protect and isolate the lens, not only can make the covering layer cover the lens cover without affecting the optical properties of the lens, but also can make the lens not protrude out of the outer surface of the light emitting device, and the covering layer can be shaped as required to form, for example, a light emitting device with a straight outer surface.

Drawings

The above and other objects, features and advantages of exemplary embodiments of the present disclosure will become readily apparent from the following detailed description read in conjunction with the accompanying drawings. Several embodiments of the present disclosure are illustrated by way of example, and not by way of limitation, in the figures of the accompanying drawings and in which like reference numerals refer to similar or corresponding parts and in which:

fig. 1 is a schematic diagram generally illustrating a light emitting device according to the present disclosure;

fig. 2 is a schematic view showing a light-emitting device including a strip-shaped circuit substrate according to an embodiment of the present disclosure;

3-5 are a number of schematic diagrams illustrating light emitting devices according to embodiments of the present disclosure; and

fig. 6 is a flow chart illustrating a method for manufacturing a light emitting device according to the present disclosure.

Detailed Description

The technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the embodiments of the present disclosure, and it is obvious that the described embodiments are some, but not all embodiments of the present disclosure. All other embodiments, which can be derived by a person skilled in the art from the embodiments disclosed herein without making any creative effort, shall fall within the protection scope of the present disclosure.

It should be understood that the terms "first," "second," "third," and "fourth," etc. in the claims, description, and drawings of the present disclosure are used to distinguish between different objects and are not used to describe a particular order. The terms "comprises" and "comprising," when used in the specification and claims of this disclosure, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.

It is also to be understood that the terminology used in the description of the disclosure herein is for the purpose of describing particular embodiments only, and is not intended to be limiting of the disclosure. As used in the specification and claims of this disclosure, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should be further understood that the term "and/or" as used in the specification and claims of this disclosure refers to any and all possible combinations of one or more of the associated listed items and includes such combinations.

As used in this specification and claims, the term "if" may be interpreted contextually as "when", "upon" or "in response to a determination" or "in response to a detection". Similarly, the phrase "if it is determined" or "if a [ described condition or event ] is detected" may be interpreted contextually to mean "upon determining" or "in response to determining" or "upon detecting [ described condition or event ]" or "in response to detecting [ described condition or event ]".

The present disclosure addresses the deficiencies of the prior art by providing a completely new and realizable solution. In particular, the present disclosure can protect the lens by providing a light emitting device including a lens cover, which separates the lens from the cover layer in each light emitting unit, and can effectively prevent a series of problems or inconveniences in product packaging, storage, transportation, cleaning, abrasion, etc. caused by the lens protruding out of the outer surface of the light emitting device. In the following description, it will be understood by those skilled in the art that the present disclosure may also be applied to various embodiments to improve or form different optical effects as needed. For example, the optical performance of the light emitting device can be improved by forming one or more air gaps. Multiple cover layers may also be provided, for example, as desired, to facilitate different optical effects, etc. Specific embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings.

Fig. 1 is a schematic diagram generally illustrating a light emitting device according to the present disclosure. As shown in fig. 1, there is provided a light emitting device 100, which may include: a circuit substrate 110; a plurality of light emitting units 120 that may be arranged on the circuit substrate 110 in one or more directions; a cover layer 130 that may be disposed to extend in the one or more directions on the circuit substrate 110 and cover the plurality of light emitting units 120, wherein each of the light emitting units 120 may include a light source 121 located at a central position of the light emitting unit 120, and a lens 122 and a lens cover 123 disposed around the light source 121, wherein an incident surface of the lens 122 is disposed to surround the light source 121 so as to receive incident light from the light source 121, and the lens cover 123 is disposed between the cover layer 130 and the lens 122 so as to surround an exit surface of the lens 122.

The circuit substrate 110 described above may provide energy transfer for the plurality of light emitting devices 120 to emit light when it is energized. For example, in one embodiment, the circuit substrate 110 may be a flexible circuit board FPC or a printed circuit board PCB. The circuit substrate 110 may be in the shape of a strip, circle, square, ring, fan, etc., or other regular or irregular shape. The circuit board 110 may be a single-sided circuit board, or may be a double-sided circuit board as necessary.

The plurality of light emitting cells 120 arranged on the circuit substrate 110 according to the present disclosure may have a space therebetween. The plurality of light emitting units 120 may be regularly or irregularly arranged on the circuit substrate 110 in one direction, or may also be regularly or irregularly arranged on the circuit substrate 110 in a plurality of directions. For example, in one embodiment, the circuit substrate 110 may have a stripe shape, and the plurality of light emitting units 120 may be adjacently disposed at certain intervals along an extending direction of the stripe. In another embodiment, the circuit substrate 110 may have a V-shape, and the plurality of light emitting cells 120 may be arranged at the same or different intervals along both extension directions of the V-shape. In another embodiment, the circuit substrate 110 may have a circular shape, and the plurality of light emitting units 120 may be distributed in a plurality of directions around a center of the circle, may be arranged in a ring around the center of the circle, and the like.

As shown in fig. 1, the cover layer 130 may cover the plurality of light emitting cells 120, and may extend in the same direction as one or more arrangement directions of the plurality of light emitting cells 120. In one embodiment, the cover layer 130 may cover the entire outer surface of the light emitting unit 120. The cover layer 130 may be disposed to effectively protect the light emitting unit 120, and prevent the light emitting unit 120 from protruding or being exposed outside the entire light emitting device 100, so that abrasion or damage of the light emitting unit 120 can be avoided. In addition, the shape of the outer surface of the covering layer 130 can be set according to the needs, so as to be more favorable for meeting the requirements of convenience and safety in the aspects of packaging, transportation, storage, installation and the like, and being more favorable for cleaning the surface, thereby meeting the requirements of modern life.

Further, the cover layer 130 according to the present disclosure may wrap the light emitting unit 120, or may have a space with the light emitting unit 120. According to an embodiment of the present disclosure, the covering layer 130 may be formed by potting or injection molding, for example, the covering layer 130 may be made of potting adhesive. In one embodiment, the potting adhesive may have optical properties of being transparent or semi-transparent. In another embodiment, the potting adhesive may have optically opaque properties. In yet another embodiment, the potting adhesive may also be light transmissive but opaque. In one embodiment, the potting adhesive may be light transmissive and transparent. According to another embodiment of the present disclosure, the cover layer 130 may cover the plurality of light emitting cells 120 in the form of a cover plate to protect the light emitting cells 120. In addition, the cover layer 130 may have mechanical properties of rigidity or elasticity. According to an embodiment of the present disclosure, the cover layer 130 may be made of at least one material of epoxy, silicone, polyurethane PU, and the like.

As further shown in fig. 1, each light emitting unit 120 may include a light source 121, a lens 122, a lens cover 123, and the like, wherein the lens 122 and the lens cover 123 may be arranged around the light source 121 for a better optical effect. The light source 121 according to the present disclosure may be a light emitting device such as a small incandescent lamp, a fluorescent lamp, or a Light Emitting Diode (LED). In one embodiment, the light sources 121 may be LED lamps regularly arranged on the circuit substrate 110. The types of the light sources 121 of the plurality of light emitting units 120 may be set to be the same or different according to need. Likewise, the respective colors of the plurality of light sources 121 may also be set to be the same or different as necessary.

The lens 122 may include an incident surface and an exit surface, wherein the incident surface of the lens 122 is used for receiving incident light, and the incident light is refracted by the lens 122 and then exits from the exit surface of the lens 122. The incident surface of the lens 122 may surround the light source 121, and may be spaced apart from the light source 121. The lens 122 may be fixed to the circuit substrate 110 by, for example, providing a bracket, gluing, injection molding, snap fitting, screw fastening, or the like. The lens 122 may be a concave lens or a convex lens. In one embodiment, the lens 122 may be a Total Internal Reflection (TIR) lens. The lens 122 may be made of a transparent material. For example, according to an embodiment of the present disclosure, the lens 122 may be made of at least one material of polymethyl methacrylate PMMA, polycarbonate PC, ABS resin, epoxy resin, silicone resin, and glass. In addition, the types and sizes of the lenses 122 of the plurality of light emitting units 120 may be set to be the same or different according to need.

As shown, a lens cover 123 is disposed between the cover layer 130 and the lens 122 of each light emitting unit 120, and the lens cover 123 may surround the exit surface of the lens 122. In one embodiment, the lens cover 123 may wrap around the exit face of the lens 122. In another embodiment, there may be a space between the lens cover 123 and the lens 122. The provision of the lens cover 123 can separate the lens 122 from the cover layer 130, thereby providing effective protection for the lens 122, and can also provide the lens 122 with the possibility of coming into contact with a gas, thereby enabling the optical effect of the device to be ensured. The lens cover 123 may be made of a rigid or elastic polymer or the like. The lens cover 123 may have an optical property of being light-transmissive or semi-light-transmissive. In one embodiment, the lens cover 123 may be light transmissive and transparent or translucent. In another embodiment, the lens cover 123 may be light transmissive but opaque.

Further, the lens cover 123 may be fixed to the circuit substrate 110 or the lens 122, and the fixing method may include, for example, gluing, injection molding, clamping, and screw fastening. For example, in one embodiment, the lens cover 123 may be adhered to the circuit substrate 110, such as by glue, to surround the entire lens 122 (including the exit face of the lens 122). In another embodiment, the lens cover 123 may be fixed to the lens 122 by, for example, gluing, and surrounds the exit surface of the lens 122. In yet another embodiment, the lens 122 and the lens cover 123 may be integrally formed and fixed on the circuit substrate 110.

While the light emitting device according to the present disclosure has been generally described above in connection with fig. 1, it should be understood by those skilled in the art that the above description is illustrative and not restrictive, and that modifications may be made as required by those skilled in the art. For example, the light emitting units 120 may be disposed on the same surface of the circuit substrate 110 in the drawings, or may be disposed on both surfaces of the circuit substrate 110 as needed. The number of the light sources 121 included in each light emitting unit 120 may not be limited to one, and a plurality of light sources 121 may be arranged at a central position of the light emitting unit 120 as needed. The number of the light emitting units 120 may not be limited to two in the drawing, and may be more as needed. For ease of understanding, the shape of the circuit substrate 110 and the embodiment in which more light emitting units 120 are arranged will be exemplarily described below with reference to fig. 2.

Fig. 2 is a schematic view illustrating a light emitting device 100 including a strip-shaped circuit substrate according to an embodiment of the present disclosure. As shown in fig. 2, in one embodiment, the circuit substrate 110 may have a stripe shape, and a plurality of the light emitting units (e.g., 120-1, 120-2, 120-3, 120-4, etc.) may be adjacently disposed at certain intervals along an extending direction of the stripe and fixed on the circuit substrate 110. In order to facilitate the observation of the structure of the light emitting unit, a cross-sectional view of the light emitting unit 120-4 is also shown in fig. 2. Each of the light emitting units (120-1, 120-2, 120-3, 120-4) may have a cylindrical shape as a whole in the drawing. In this arrangement, the lens cover, which is located outside the light-emitting unit, has a cylindrical shape, and its inner space is used to accommodate a lens, for example, a lens having a substantially semi-ellipsoidal shape in the drawing, and the incident surface of the lens can enclose the light source. The cover layer 130 may have a flat outer surface so that the entire light emitting device 100 may have a regular rectangular parallelepiped shape or a bar shape, etc.

According to another embodiment of the present disclosure, the width of the stripe-shaped circuit substrate 110 may not be limited to that shown in the drawings, and may be wider than that shown in the drawings, so that a plurality of light emitting units may be arranged to extend in a plurality of directions of the stripe. In one embodiment, the width of the circuit substrate may be at least twice as large as that of the illustrated embodiment, and the plurality of light emitting cells may be arranged side by side in two groups on the striped circuit substrate.

The light emitting device 100 in the form of a strip is described above with reference to fig. 2. It is to be understood that the above description is intended to be illustrative, and not restrictive, and that various changes and modifications may be suggested to one skilled in the art in light of the teachings of this disclosure. For example, the shape of the cover layer 130 may not be limited to a rectangular parallelepiped in the illustration, but may be provided in other shapes such as a cylinder or a semi-cylinder, as needed. The number of the light emitting units may not be limited to four in the drawing, and may be more or less as needed. The shape of the lens cover may not be limited to the cylindrical shape, and may be provided in other shapes such as a square, a rectangular parallelepiped, and the like as needed. The outer surface shape of the lens may not be limited to the bowl shape in the illustration, but may be provided in other shapes as needed.

Fig. 3 is a schematic view illustrating a light emitting device according to an embodiment of the present disclosure. As shown in fig. 3, the light emitting device 100 may include a circuit substrate 110, a plurality of light emitting cells disposed on the circuit substrate 110, a cover layer 130 covering the plurality of light emitting cells, and the like. Each light emitting unit may include a light source 121 located at a central position of the light emitting unit, and a lens 122 and a lens cover 123 arranged around the light source 121. The lens 122 may be a Total Internal Reflection (TIR) lens, and thus has the characteristics of small refraction angle, clear light spot formed after refraction, high concentration degree, no dispersion and the like, and is suitable for scenes with a demand on light condensation effect.

According to one embodiment of the present disclosure, there may be a spacing between the exit face 1222 of the lens 122 and the lens cover 123 to form the first air gap 124. According to such an arrangement, the outgoing light emitted from the outgoing surface 1222 can be optically refracted through the first air gap 124 to achieve the effect of primary light condensation. According to another embodiment of the present disclosure, there may be a spacing between the incident face 1221 of the lens 122 and the light source 121 to form a second air gap 125. With this arrangement, incident light from the light source 121 can be refracted by the second air gap 125 before entering the incident surface 1221 of the lens 122. When the light emitting unit has both the first air gap 124 and the second air gap 125, the two air gaps can provide two optical refractions, thereby further enhancing the optical effect such as light condensation.

Specifically, as shown in fig. 3, according to an embodiment of the present disclosure, the incident surface 1221 of the lens 122 may include a concave portion having a curved surface structure, the exit surface 1222 of the lens 122 may include a convex portion having a curved surface, a distance may exist between the convex portion (i.e., the exit surface 1222) and the lens cover 123 to form the first air gap 124, and a distance may exist between the concave portion (i.e., the incident surface 1221) and the light source 121 to form the second air gap 125. The lens cover 123 may be fixed to the circuit board 110, or may be fixed to the lens 122 and disposed at a position surrounding the convex portion (i.e., the exit surface 1222), for example.

Further, according to another embodiment of the present disclosure, the light emitting device 100 may further include a tray 140 for placing the circuit substrate 110, wherein the cover layer 130 may be filled in the tray 140 and integrally formed with the tray 140 to have a flat outer surface. The cover 130 may be filled in the tray by injection molding, potting, or the like, or may be inserted into the tray 140 by an integrally formed member. The tray 140 may be transparent or opaque. The tray 140 may be, but is not limited to, having elastic or rigid mechanical properties. In one embodiment, the tray 140 may be made of at least one of metal or plastic, such as at least one of aluminum, copper, steel, polyvinyl chloride, PVC, silicone, and the like.

As further shown in fig. 3, the circuit substrate 110 may be placed in the tray 140 and may be secured in the tray 140 by, for example, snapping, plugging, bonding, etc. The cover layer 130 may be filled in the tray 140 and cover the plurality of light emitting cells. The cover layer 130 may be adapted to the shape of the tray 140, for example, the cover layer 130 in the illustration may be flush with the side panel edges of the tray 140, thereby integrally forming the light emitting device 100 with a flat outer surface with the tray 140. In another embodiment, the side plates of the tray 140 are lower than the height of the light emitting unit, and the cover layer 130 may protrude out of the tray 140 and may be provided as a curved or flat outer surface as needed.

While the light emitting device according to the embodiment of the present disclosure is described above with reference to fig. 3, it should be understood by those skilled in the art that the above description is illustrative and not restrictive, and that the modifications may be made by those skilled in the art as required. For example, the shape and type of the lens 122 may not be limited to those shown in fig. 3, and may be set as desired. The structure of the incident surface 1221 of the lens 122 is not limited to the curved surface structure shown in the figure, and may be provided as a straight structure or the like, for example, as needed. For ease of understanding, another arrangement of the light emitting device of the present disclosure will be further exemplarily described below in conjunction with fig. 4.

As shown in fig. 4, the light emitting device 100 may include a circuit substrate 110, a plurality of light emitting cells disposed on the circuit substrate 110, a cover layer 130 covering the plurality of light emitting cells, a tray 140 for disposing the circuit substrate 110, and the like. Each light emitting unit may include a light source 121 located at a central position of the light emitting unit, and a lens 122 and a lens cover 123 arranged around the light source 121. The light emitting device 100 is different from the light emitting device shown in fig. 3 in the structure and type of the lens 122, and the lens 122 shown in fig. 4 will be described in detail below.

The incident surface of the lens 122 may include a recess 1223 having a straight structure, the exit surface 1222 of the lens 122 may include a protrusion having a curved surface, the protrusion (i.e., the exit surface 1222) may be spaced apart from the lens cover 123 to form the first air gap 124, and the recess 1223 (i.e., the incident surface) may be spaced apart from the light source 121 to form the second air gap 125. The first gap 124 and the second gap 125 are the same or similar to the gaps described in connection with fig. 3 and will not be described in detail here. The lens 122 according to the present embodiment can be made smaller in volume due to the incident surface having the flat structure concave portion, and thus can be applied to a scene where miniaturization of the light emitting unit is required. In one embodiment, the lens 122 may be a concave lens, which has the function of light dispersion, that is, the range of the light spot formed after refraction is large and relatively dispersed, and is suitable for a scene with a requirement on the light dispersion effect.

The embodiments of the light emitting device of the present disclosure are described above with reference to fig. 3 and 4, and may be adjusted and set by those skilled in the art as needed. For example, the incident surface of the lens 122 may not be limited to the curved surface structure or the straight structure shown in fig. 3 and 4, but may be provided in other structures as needed. The type of lens 122 may be selected according to the desired optical effect. The lens cover 123 may be configured to be fixed to the circuit substrate 110 or the lens 122 as necessary. The structure of the cover layer 130 may not be limited to one layer in the illustration, and may be provided as a plurality of layers as necessary. A light emitting device including a multi-layered cover layer will be exemplarily described below with reference to fig. 5.

As shown in fig. 5, the light emitting device 100 may include a circuit substrate 110, a plurality of light emitting cells disposed on the circuit substrate 110, a cover layer 130 covering the plurality of light emitting cells, a tray 140 for disposing the circuit substrate 110, and the like. Each light emitting unit may include a light source 121 located at a central position of the light emitting unit, and a lens 122 and a lens cover 123 arranged around the light source 121. Further, according to an embodiment of the present disclosure, the cover layer 130 may include a first cover layer 131 and a second cover layer 132, the first cover layer 131 may be disposed to extend along a top portion of the lens cover 123, and the second cover layer 132 may be disposed to extend along both sides of the lens cover 123, wherein the first cover layer 131 may have an optical property of transmitting light, and the second cover layer 132 may have an optical property of transmitting or semi-transmitting light. The circuit substrate 110, the light emitting unit, the tray 140, and the like have been described in detail in conjunction with the above, and will not be described again, and the first and second cover layers 131 and 132 will be described in detail in conjunction with fig. 5.

As further shown in fig. 5, the first cover layer 131 may be arranged extending along the top of the lens cover 123, i.e. along the light exit surface of the lens cover 123. In one embodiment, the first cover layer 131 may be transparent to have better light transmission performance. In another embodiment, the first cover 131 may be integrally formed with the tray 140 to have a flat outer surface. The second cover layer 132 may extend along both sides of the lens cover 123, that is, may extend along the non-light-emitting surface of the lens cover 123. In some application scenarios, the second covering layer 132 may have an opaque optical property, so as to effectively prevent light leakage, and further facilitate light collection and avoid forming unnecessary light spots when the light emitting device 100 emits light. In other application scenarios, the second cover layer 132 can be configured to have semi-transparent optical properties as required to meet the requirements of optical effects such as multi-spot.

While the light emitting device in which the two cover layers are arranged is described above with reference to fig. 5, it will be understood by those skilled in the art that the above description is illustrative and not restrictive, for example, the number of the cover layers 130 may not be limited to the two layers shown in the drawings, and may be more or less as desired. The shape and type of the lens 122 may not be limited to those shown in the figures, and may be provided as needed, for example, as the shape of the lens shown in fig. 4 or other shapes, etc.

Through the above description of the technical solutions of the light emitting device of the present disclosure and the embodiments thereof, it can be understood by those skilled in the art that the light emitting device of the present disclosure can have a flat outer surface without affecting the optical effect, thereby effectively avoiding a series of problems or inconveniences in packaging, storage, transportation, cleaning, abrasion, etc. caused by the lens protruding out of the outer surface of the light emitting device. The light-emitting device of the present disclosure can also increase the number of optical refractions by providing two air gaps, thereby enhancing the optical effect of the device. Further, the light emitting device according to the present disclosure may further include a plurality of cover layers having different functions, which can meet the requirements of preventing light leakage in some application scenarios. Therefore, the light-emitting device according to the present disclosure can achieve the purposes of convenience, safety, different optical effects, etc. in various ways, thereby being capable of satisfying various application requirements of the light-emitting device and further improving user experience.

According to a second aspect of the present disclosure, there is provided a light fixture, which may include a power supply device and a light emitting device, wherein the light emitting device may include: a circuit board electrically connectable to the power supply device; a plurality of light emitting cells that may be arranged on the circuit substrate in one or more directions; a cover layer which may be arranged to extend in the one or more directions on the circuit substrate and cover the plurality of light emitting units, wherein each of the light emitting units may include a light source located at a central position of the light emitting unit, and a lens cover arranged to surround the light source, wherein an incident surface of the lens may be arranged to surround the light source so as to receive incident light from the light source, and the lens cover may be arranged to be located between the cover layer and the lens so as to surround an exit surface of the lens.

The power supply means described hereinabove may be used to supply electrical power to the circuit substrate to enable the light emitting device to emit light during use. The luminaire according to the present disclosure may be a household or commercial lighting luminaire such as a decorative luminaire, a billboard luminaire, a traffic light, a desk lamp, a dome lamp, etc. The light emitting device according to the present disclosure has been described in detail in the foregoing, and will not be described in detail herein.

According to a third aspect of the present disclosure, there is provided a method 200 for manufacturing a light emitting device, as shown in fig. 6, in step 202, the method 200 may provide a circuit substrate on which light emitting units arranged in one or more directions may be arranged, wherein each of the light emitting units may include a light source located at a central position of the light emitting unit, and a lens cover arranged around the light source. Next, in step 204, the method 200 may arrange a cover layer on the circuit substrate, the cover layer extending along the one or more directions and covering the plurality of light emitting cells. Further, the method 200 may further include: arranging an incident surface of the lens to surround the light source so as to receive incident light from the light source; and arranging the lens cover to be located between the cover layer and the lens so as to surround the exit face of the lens. The above-mentioned method according to the present disclosure has been described in detail in the foregoing in connection with the apparatus of the present disclosure, and is not described herein again.

Although the embodiments of the present disclosure are described above, the descriptions are only examples for facilitating understanding of the present disclosure, and are not intended to limit the scope and application scenarios of the present disclosure. It will be understood by those skilled in the art of the present disclosure that various changes in form and details may be made therein without departing from the spirit and scope of the disclosure, and that the scope of the disclosure is to be limited only by the appended claims.

Claims

1. A light emitting device comprising:

a circuit substrate;

a plurality of light emitting cells arranged on the circuit substrate in one or more directions;

a cover layer arranged to extend in the one or more directions on the circuit substrate and cover the plurality of light emitting cells,

wherein each of the light emitting units includes a light source located at a central position of the light emitting unit and a lens cover arranged around the light source,

wherein the entrance face of the lens is arranged to surround the light source so as to receive the incident light from the light source, and the lens cover is arranged to be located between the cover layer and the lens so as to surround the exit face of the lens.

2. The light-emitting device according to claim 1, wherein the circuit substrate is in a shape of a stripe, and a plurality of the light-emitting units are adjacently arranged at intervals in an extending direction of the stripe.

3. The light emitting device of claim 1, wherein there is a spacing between the exit face of the lens and the lens cover to form a first air gap.

4. The light emitting device of claim 3, wherein there is a spacing between an incident face of the lens and the light source to form a second air gap.

5. The light emitting device of claim 4, wherein the entrance surface of the lens comprises a concave portion having a curved structure, the exit surface of the lens comprises a convex portion having a curved surface, the convex portion and the lens cover have a spacing therebetween to form the first air gap, and the concave portion and the light source have a spacing therebetween to form the second air gap.

6. The light emitting device of claim 4, wherein the incident surface of the lens comprises a concave portion having a straight structure, the exit surface of the lens comprises a convex portion having a curved surface, the convex portion is spaced apart from the lens cover to form the first air gap, and the concave portion is spaced apart from the light source to form the second air gap.

7. The light emitting device of claim 1, wherein the cover layer is made of a potting adhesive, and the potting adhesive has optical properties of being light transmissive or semi-light transmissive.

8. The light emitting device of claim 1, wherein the cover layer comprises a first cover layer and a second cover layer, the first cover layer extending along a top portion of the lens cover and the second cover layer extending along two sides of the lens cover, wherein the first cover layer has optical properties of being light transmissive and the second cover layer has optical properties of being light or light semi-transmissive.

9. The light emitting device of claim 1, further comprising a tray for holding the circuit substrate, wherein the cover layer fills in the tray and forms a flat outer surface integrally with the tray.

10. The light emitting device of claim 1, wherein the lens is made of at least one of Polymethylmethacrylate (PMMA), Polycarbonate (PC), ABS resin, epoxy, silicone, glass, the lens cover is made of a rigid or elastic polymer, and the cover layer is made of at least one of epoxy, silicone, Polyurethane (PU).

11. The light-emitting device according to claim 1, wherein the light source is an LED lamp regularly arranged on the circuit substrate, the circuit substrate being a flexible circuit board or a printed circuit board.

12. A luminaire comprising a power supply and a light emitting device, wherein the light emitting device comprises:

a circuit board electrically connected to the power supply device;

13. A method for manufacturing a light emitting device, comprising:

providing a circuit substrate on which light emitting units arranged in one or more directions are arranged; and

disposing a cover layer on the circuit substrate, the cover layer extending in the one or more directions and covering the plurality of light emitting cells,

wherein each of the light emitting units includes a light source located at a central position of the light emitting unit, and a lens cover arranged around the light source, the method further comprising:

arranging an incident surface of the lens to surround the light source so as to receive incident light from the light source; and

the lens cover is arranged to be located between the cover layer and the lens so as to surround the exit face of the lens.