Light-emitting device
By using polytetrafluoroethylene and a second light-transmitting layer with high rigidity in the light-emitting device, the problem of insufficient light uniformity was solved, thereby improving the uniformity of light and enhancing the reliability of the device.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- BEIJING AIRDOC TECH CO LTD
- Filing Date
- 2026-02-28
- Publication Date
- 2026-05-19
AI Technical Summary
The light emitted by existing light-emitting devices has poor uniformity.
Polytetrafluoroethylene (PTFE) is used as the first light-transmitting layer, and a material with greater rigidity is used as the second light-transmitting layer, which is placed opposite to it and their sides are close to each other to restrict the deformation of the first light-transmitting layer, improve its flatness, and thus improve the uniformity of light.
This structural design significantly improves the uniformity of light, especially the uniformity of ultraviolet light, thereby enhancing the reliability of the device and the utilization rate of light.
Smart Images
Figure CN122062222A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of light-emitting technology, and more particularly to a light-emitting device. Background Technology
[0002] Light-emitting devices are used to emit light, but in related technologies, the uniformity of the light emitted by these devices is poor. Summary of the Invention
[0003] This application provides a light-emitting device that can improve the uniformity of ultraviolet light.
[0004] The light-emitting device provided in this application includes a light-emitting element and a light-diffusing cover. The light-emitting element is used to emit light; the light-diffusing cover includes a first light-transmitting layer and a second light-transmitting layer. The first light-transmitting layer is made of polytetrafluoroethylene (PTFE), and the second light-transmitting layer has a higher rigidity than the first light-transmitting layer. The second light-transmitting layer and the first light-transmitting layer are disposed opposite to each other, with their adjacent sides abutting against each other. Along the arrangement direction of the second light-transmitting layer and the first light-transmitting layer, the second light-transmitting layer and the first light-transmitting layer are located on the same side of the light-emitting surface of the light-emitting element and are disposed opposite to the light-emitting surface.
[0005] In some implementations of this application, the light-emitting element is used to emit ultraviolet light, and the material of the second light-transmitting layer is a cyclic block copolymer, quartz glass, or plastic.
[0006] In some implementations of this application, the second light-transmitting layer is bonded to the side of the first light-transmitting layer that is close to each other.
[0007] In some implementations of this application, a base is also included, and the second light-transmitting layer is fixedly connected to the base.
[0008] In some implementations of this application, a base is further included, the base having a receiving cavity with a first opening; the light-emitting element is disposed within the receiving cavity with its light-emitting surface facing the first opening; the light-diffusing cover is combined with the first opening, and the second light-transmitting layer is located on the side of the first light-transmitting layer near the light-emitting surface.
[0009] In some implementations of this application, the light-emitting element is used to emit medium-wave ultraviolet light.
[0010] In some implementations of this application, the wavelength of the ultraviolet light emitted by the light-emitting element is 294 nanometers to 300 nanometers.
[0011] In some implementations of this application, a reflector is also included. The reflector is located on the side of the second light-transmitting layer and the first light-transmitting layer that is close to the light-emitting surface. Along the first direction, the reflector is disposed on one side of the light-emitting surface. The arrangement direction of the second light-transmitting layer and the first light-transmitting layer is perpendicular to the first direction. The reflector faces the light-emitting surface and the first light-transmitting layer.
[0012] In some implementations of this application, the number of light-emitting elements is at least two, and the at least two light-emitting elements are spaced apart in a second direction, with the arrangement direction of the second light-transmitting layer perpendicular to the first light-transmitting layer in the second direction.
[0013] In some implementations of this application, the reflector is located between the light-emitting surfaces of at least two of the light-emitting elements.
[0014] In some implementations of this application, the reflector has a clearance through hole, the through hole being oriented in the same direction as the arrangement of the second light-transmitting layer and the first light-transmitting layer, and the light-emitting element is embedded in the clearance through hole.
[0015] The light-emitting device provided in this application arranges a second light-transmitting layer opposite to a first light-transmitting layer, with both layers positioned on the same side of the light-emitting surface along their arrangement direction. This allows light emitted from the light-emitting surface to pass through both layers. The first light-transmitting layer is made of polytetrafluoroethylene (PTFE), which improves light uniformity. The second light-transmitting layer has higher rigidity, and the adjacent sides of the first and second light-transmitting layers abut against each other, allowing the second layer to restrict the deformation of the first layer and improving its flatness, thereby enhancing light uniformity. Therefore, the light-emitting device provided in this application improves light uniformity.
[0016] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description
[0017] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 These are schematic diagrams of the light-emitting device structure in some embodiments of this application; Figure 2 This is a schematic diagram of the internal structure of the light-emitting device in some embodiments of this application; Figure 3 This is an exploded view of the light-emitting device in some embodiments of this application.
[0018] Figure label: 1-Light-emitting element; 2-Light-diffusing cover; 21-First light-transmitting layer; 22-Second light-transmitting layer; 3-Base; 31-Frame; 311-First opening; 312-Weight-reducing cavity; 313-Second opening; 32-Cap; 321-Body part; 322-Flanged part; 4-Pressure plate; 5-Fastener; 6-Reflector; 61-Avoidance through hole; 7-Circuit board; 8-Control module; x-First direction; z-Third direction. Detailed Implementation
[0019] Embodiments of the present invention will now be described in detail. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention. All other embodiments obtained by those skilled in the art based on the embodiments in this application without inventive effort are within the scope of protection of this application.
[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit this application.
[0021] The terms "first" and "second" in the specification and claims of this application may explicitly or implicitly include one or at least two of the features. In the description of this invention, unless otherwise stated, "at least two" means two or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.
[0022] In the description of this invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "left", "right", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.
[0023] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.
[0024] Please refer to Figure 1 , Figure 2 and Figure 3 This application provides a light-emitting device, which includes a light-emitting element 1 and a light-diffusing cover 2. The light-emitting element 1 is used to emit light; the light-diffusing cover 2 includes a first light-transmitting layer 21 and a second light-transmitting layer 22. The first light-transmitting layer 21 is made of polytetrafluoroethylene, and the second light-transmitting layer 22 has a higher rigidity than the first light-transmitting layer 21. The second light-transmitting layer 22 and the first light-transmitting layer 21 are disposed opposite to each other, and their close sides abut against each other. Along the arrangement direction of the second light-transmitting layer 22 and the first light-transmitting layer 21, the second light-transmitting layer 22 and the first light-transmitting layer 21 are located on the same side of the light-emitting surface of the light-emitting element 1 and are disposed opposite to the light-emitting surface.
[0025] The light-emitting device provided in this application embodiment arranges a second light-transmitting layer 22 opposite to a first light-transmitting layer 21, with the second light-transmitting layer 22 and the first light-transmitting layer 21 located on the same side of the light-emitting surface of the light-emitting element 1 along their arrangement direction, and arranged opposite to the light-emitting surface. This allows light emitted from the light-emitting surface to pass through the first light-transmitting layer 21 and the second light-transmitting layer 22. The first light-transmitting layer 21 is made of polytetrafluoroethylene (PTFE), and the passage of light through the first light-transmitting layer 21 improves uniformity. The second light-transmitting layer 22 has higher rigidity, and the sides of the first light-transmitting layer 21 and the second light-transmitting layer 22 abut against each other, allowing the second light-transmitting layer 22 to restrict the deformation of the first light-transmitting layer 21, which helps improve the flatness of the first light-transmitting layer 21, thereby improving the uniformity of light. Therefore, the light-emitting device provided in this application embodiment can improve the uniformity of light.
[0026] In addition, the first light-transmitting layer 21 is made of polytetrafluoroethylene, which makes the first light-transmitting layer 21 less expensive and more flexible, able to absorb external impacts well and not easily damaged, which helps to improve the reliability of the light-diffusing mask 2.
[0027] Please refer to Figure 1 , Figure 2 and Figure 3 The light-emitting element 1 in this application embodiment can be implemented in various forms. For example, it can be a light-emitting diode, a low-pressure mercury lamp, or a metal halide lamp, etc.
[0028] Please refer to Figure 1 , Figure 2 and Figure 3 In this embodiment, the arrangement direction of the second light-transmitting layer 22 and the first light-transmitting layer 21, that is, the direction in which the first light-transmitting layer 21 and the second light-transmitting layer 22 are arranged opposite each other, can be referred to the third direction z in the figure. It can be understood that the first light-transmitting layer 21, the second light-transmitting layer 22 and the light-emitting surface are arranged along the third direction z. It can be that the first light-transmitting layer 21 is located on the side of the second light-transmitting layer 22 away from the light-emitting surface, that is, the first light-transmitting layer 21, the second light-transmitting layer 22 and the light-emitting surface are arranged opposite each other in sequence; or it can be that the second light-transmitting layer 22 is located on the side of the first light-transmitting layer 21 away from the light-emitting surface, that is, the second light-transmitting layer 22, the first light-transmitting layer 21 and the light-emitting surface are arranged opposite each other in sequence.
[0029] Please refer to Figure 1 , Figure 2 and Figure 3 In some embodiments of this application, the first light-transmitting layer 21 may be a film structure, a plate structure or a sheet structure.
[0030] Please refer to Figure 1 , Figure 2 and Figure 3 In some embodiments of this application, the light-emitting element 1 is used to emit ultraviolet light, and the material of the second light-transmitting layer 22 is a cyclic block copolymer, plastic, or quartz glass. With this structural configuration, the second light-transmitting layer 22 has high rigidity, which is beneficial for improving the flatness of the first light-transmitting layer 21. Furthermore, the second light-transmitting layer 22 has high ultraviolet light transmittance, which is beneficial for reducing ultraviolet light loss. In addition, the second light-transmitting layer 22 has high strength, which is beneficial for improving the reliability of the light-diffusing mask 2.
[0031] Please refer to Figure 1 , Figure 2 and Figure 3 In some embodiments of this application, the second light-transmitting layer 22 is bonded to the side of the first light-transmitting layer 21 that are close to each other. With this structure, the second light-transmitting layer 22 can greatly limit the deformation of the first light-transmitting layer 21, which helps to improve the flatness of the first light-transmitting layer 21 and thus improve the uniformity of light.
[0032] Please refer to Figure 1 , Figure 2 and Figure 3 In some embodiments of this application, the second light-transmitting layer 22 may protrude toward the first light-transmitting layer 21. This helps to increase the pre-tightening force between the first light-transmitting layer 21 and the second light-transmitting layer 22, resulting in a higher degree of adhesion between the first light-transmitting layer 21 and the second light-transmitting layer 22, thereby improving the flatness of the first light-transmitting layer 21.
[0033] Please refer to Figure 1 , Figure 2 and Figure 3 In some embodiments of this application, the second light-transmitting layer 22 can be an arc-shaped plate structure, and the first light-transmitting layer 21 is disposed on the side of the second light-transmitting layer 22 away from the central axis, where the central axis refers to the central axis of the arc-shaped plate structure. This helps to increase the pre-tightening force between the first light-transmitting layer 21 and the second light-transmitting layer 22, resulting in a higher degree of adhesion between the first light-transmitting layer 21 and the second light-transmitting layer 22, thereby improving the flatness of the first light-transmitting layer 21.
[0034] Please refer to Figure 1 , Figure 2 and Figure 3 In some embodiments of this application, the second light-transmitting layer 22 can be a spherical plate-like structure, and the first light-transmitting layer 21 is disposed on the side of the second light-transmitting layer 22 away from the center of the sphere, where the center of the sphere refers to the center of the spherical plate-like structure. This helps to increase the pre-tightening force between the first light-transmitting layer 21 and the second light-transmitting layer 22, resulting in a higher degree of adhesion between the first light-transmitting layer 21 and the second light-transmitting layer 22, thereby improving the flatness of the first light-transmitting layer 21.
[0035] Please refer to Figure 1 , Figure 2 and Figure 3 In some embodiments of this application, the light-emitting device further includes a base 3, and the second light-transmitting layer 22 is fixedly connected to the base 3. With this structural form, the second light-transmitting layer 22 is fixedly connected to the base 3, which can make full use of the high rigidity of the second light-transmitting layer 22, and is beneficial to improving the stability of the uniform light cover 2 installed on the base 3.
[0036] Please refer to Figure 1 , Figure 2 and Figure 3 In some embodiments of this application, the light-emitting device further includes a base 3, which has a receiving cavity with a first opening 311. A light-emitting element 1 is disposed within the receiving cavity, with its light-emitting surface facing the first opening 311. A light-diffusing cover 2 is integrated with the first opening 311, and a second light-transmitting layer 22 is located on the side of the first light-transmitting layer 21 closest to the light-emitting surface. With this structure, the base 3 can protect the light-emitting element 1, which helps improve the reliability of the light-emitting device. The second light-transmitting layer 22 is located on the side of the first light-transmitting layer 21 closest to the light-emitting surface, meaning the first light-transmitting layer 21 is closer to the outside of the receiving cavity than the second light-transmitting layer 22. The first light-transmitting layer 21 has high flexibility and can effectively absorb external impact forces, making it less susceptible to damage. This protects the second light-transmitting layer 22, further improving the reliability of the light-emitting device.
[0037] Please refer to Figure 1 , Figure 2 and Figure 3In some embodiments of this application, the light-diffusing mask 2 can be sealed together with the first opening 311. This improves the sealing effect of the receiving cavity, allowing the light-emitting element 1 to be better protected, and thus improving the reliability of the light-emitting device.
[0038] Please refer to Figure 1 , Figure 2 and Figure 3 In some embodiments of this application, the light-diffusing mask 2 abuts against the side of the receiving cavity where the first opening 311 is formed. With this structure, the assembly of the light-diffusing mask 2 and the base 3 is more convenient.
[0039] Based on this, in some embodiments of this application, the light-emitting device further includes a pressure plate 4 and a fastener 5. The pressure plate 4 extends along the contour of the first opening 311 and is disposed on the side of the light-diffusing mask 2 away from the receiving cavity. The fastener 5 passes through the pressure plate 4, the light-diffusing mask 2, and the base 3 to fix the pressure plate 4, the light-diffusing mask 2, and the base 3 together. In this structural configuration, the outer edge of the light-diffusing mask 2 is sandwiched between the pressure plate 4 and the base 3, which helps to improve the reliability of the outer edge of the light-diffusing mask 2. It is understood that the outer edge of the light-diffusing mask 2 is a weak point and is easily damaged. Strengthening the outer edge of the light-diffusing mask 2 can significantly improve its reliability.
[0040] Please refer to Figure 1 , Figure 2 and Figure 3 In some embodiments of this application, the fastener 5 is a screw, the screw shank of which passes through the pressure plate 4 and the light-diffusing cover 2 in sequence to engage with the base 3. In this way, the force of the screw nut acts on the light-diffusing cover 2 through the pressure plate 4, resulting in a smaller pressure on the light-diffusing cover 2, which is beneficial to improving the reliability of the light-diffusing cover 2.
[0041] Please refer to Figure 1 , Figure 2 and Figure 3 In some embodiments of this application, the light-emitting element 1 is used to emit medium-wave ultraviolet light. Polytetrafluoroethylene (PTFE) can effectively improve the uniformity of medium-wave ultraviolet light, thus enabling the light-emitting element 1 to emit medium-wave ultraviolet light with better uniformity. In some embodiments of this application, the wavelength of the ultraviolet light emitted by the light-emitting element 1 is 294 nm to 300 nm. This further enhances the uniformity of the ultraviolet light emitted by the light-emitting element 1. Ultraviolet light with a wavelength of 294 nm to 300 nm is less harmful to the human body and can achieve a therapeutic effect when irradiated. The light-emitting device provided in the embodiments of this application emits ultraviolet light with high uniformity, ensuring consistent ultraviolet radiation exposure across the skin and improving safety.
[0042] Please refer to Figure 1 , Figure 2 and Figure 3 In some embodiments of this application, the light-emitting device further includes a reflector 6. The reflector 6 is located on the side of the second light-transmitting layer 22 and the first light-transmitting layer 21 near the light-emitting surface. Along the first direction x, the reflector 6 is disposed on one side of the light-emitting surface. The arrangement direction of the second light-transmitting layer 22 and the first light-transmitting layer 21 is perpendicular to the first direction x. The reflector 6 faces the light-emitting surface and the first light-transmitting layer 21. The reflector 6 is used to reflect the light emitted by the light-emitting surface. By disposing the reflector 6 on one side of the light-emitting surface along the first direction x and facing the light-emitting surface and the first light-transmitting layer 21, the light emitted by the light-emitting surface that propagates along the first direction x can be reflected by the reflector 6 to the light-diffusing cover 2, achieving a light-focusing effect. The light emitted by the light-emitting element 1 can pass through the second light-transmitting layer 22 and the first light-transmitting layer 21 more, resulting in a higher light utilization rate.
[0043] Please refer to Figure 1 , Figure 2 and Figure 3 The reflector 6 in this application embodiment can be made of various materials. For example, in some embodiments of this application, it can be stainless steel, silver, aluminum or chromium, etc.
[0044] Please refer to Figure 1 , Figure 2 and Figure 3 In some embodiments of this application, the arrangement direction of the reflector 6 and the light-emitting surface is perpendicular to the third direction z. This helps to reduce the space required for arranging the light-emitting element 1 and the reflector 6 in the third direction z, and improves the compactness of the light-emitting device.
[0045] Please refer to Figure 1 , Figure 2 and Figure 3 In some embodiments of this application, the base 3 includes a frame 31 and a cover 32. It is understood that the frame 31 forms a central through hole. In this embodiment, the first opening 311 is the opening at one end of the central through hole. At least a portion of the cover 32 is disposed opposite to the opening at the other end of the central through hole. The cover 32 is fixedly connected to the frame 31. The reflector 6 is supported between the end face of the other end of the central through hole and the cover 32. The opening at the other end of the central through hole is shown in the figure as the second opening 313. With this structure, the assembly of the reflector 6 and the base 3 is relatively convenient. During installation, the reflector 6 is first placed between the frame 31 and the cover 32, and then the frame 31 and the cover 32 are fixed, so that the reflector 6 is sandwiched between the frame 31 and the cover 32, making the installation process relatively convenient.
[0046] Please refer to Figure 1 , Figure 2 and Figure 3In some embodiments of this application, the frame 31 has a weight-reducing cavity 312 that extends circumferentially along the frame 31. This helps to save costs and reduce the weight of the frame 31. In some embodiments of this application, the extension path of the weight-reducing cavity 312 matches the extension of the frame 31; for example, the extension path of the weight-reducing cavity 312 can be a closed loop.
[0047] Please refer to Figure 1 , Figure 2 and Figure 3 In some embodiments of this application, the cover 32 includes a body portion 321 and a flange portion 322. The body portion 321 is disposed opposite to the second opening 313, and the reflector 6 is supported between the end face of the other end of the central through hole and the body portion 321. The flange portion 322 is formed on the outer edge of the body portion 321, and the reflector 6 is located within the space enclosed by the flange portion 322 and the body portion 321. The flange portion 322 is fixedly connected to the frame 31. In this way, the reflector 6 is located within the space enclosed by the flange portion 322 and the body portion 321, which provides better protection for the reflector 6 and improves reliability.
[0048] Please refer to Figure 1 , Figure 2 and Figure 3 In some embodiments of this application, the fixed connection between the cover 32 and the frame 31 can be implemented in various ways. For example, it can be connected by fasteners 5, glued, snapped or welded.
[0049] Please refer to Figure 1 , Figure 2 and Figure 3 In some embodiments of this application, the number of light-emitting elements 1 is at least two, and the at least two light-emitting elements 1 are spaced apart in the second direction. The arrangement direction of the second light-transmitting layer 22 and the first light-transmitting layer 21 is perpendicular to the second direction. With this structure, the at least two light-emitting elements 1 are provided, and the at least two light-emitting elements 1 are respectively aligned with various parts of the light-diffusing mask 2. This makes the amount of light transmitted through various parts of the light-diffusing mask 2 more consistent, which is beneficial to improving the uniformity of light.
[0050] It should be explained that, in the embodiments of this application, at least two light-emitting elements 1 are spaced apart in the second direction, that is, at least two light-emitting elements 1 have a gap in the second direction. In some embodiments of this application, the arrangement direction of at least two light-emitting elements 1 is the same as the second direction. In this way, the space required to arrange at least two light-emitting elements 1 in the arrangement direction of the second light-transmitting layer 22 and the first light-transmitting layer 21 is less, which is beneficial to improving the compactness of the structure. Of course, in some embodiments of this application 2, the arrangement direction of at least two light-emitting elements 1 may not be the second direction.
[0051] Please refer to Figure 1 , Figure 2 and Figure 3 In some embodiments of this application, at least two light-emitting elements 1 are evenly distributed along the extension direction of the first light-transmitting layer 21. This helps to improve the uniformity of the light.
[0052] Please refer to Figure 1 , Figure 2 and Figure 3 In some embodiments of this application, the reflector 6 is located between the light-emitting surfaces of at least two light-emitting elements 1. It is understood that in the uniform light cover 2, the portion aligned with the light-emitting surface (hereinafter referred to as the first portion) transmits a greater amount of light, while the portion aligned with the area between the two light-emitting elements 1 (hereinafter referred to as the second portion) transmits a less amount of light. By placing the reflector 6 between at least two light-emitting elements 1, the second portion is aligned with the reflector 6, allowing the second portion to transmit more light reflected by the reflector 6. This increases the amount of light transmitted by the second portion, which is beneficial for making the amount of light transmitted by the first portion and the second portion more consistent, and thus improving the uniformity of the light.
[0053] It is understandable that the reflector 6 is located between the light-emitting surfaces of at least two light-emitting elements 1, that is, the first direction x is the same as the second direction.
[0054] Please refer to Figure 1 , Figure 2 and Figure 3 In some embodiments of this application, a clearance through-hole 61 is formed on the reflector 6, and the through-hole 61 is oriented in the same direction as the arrangement of the second light-transmitting layer 22 and the first light-transmitting layer 21. The light-emitting element 1 is embedded in the clearance through-hole 61. This structural form, in which the light-emitting element 1 is embedded in the clearance through-hole 61, helps to improve the reliability of the installation of the light-emitting element 1.
[0055] Please refer to Figure 1 , Figure 2 and Figure 3 In some embodiments of this application, the light-emitting device further includes a circuit board 7, which is disposed on the back side of the reflector 6, and the light-emitting element 1 is integrated on the circuit board 7. In this way, integrating the light-emitting element 1 on the circuit board 7 results in a simpler structure and facilitates the assembly of the light-emitting device.
[0056] Please refer to Figure 1 , Figure 2 and Figure 3 In some embodiments of this application, the light-emitting device further includes a control module 8, which is electrically connected to the circuit board 7 and is used to control the intensity of the emitted light from the light-emitting element 1. Thus, by providing the control module 8, the intensity of the light can be adjusted more conveniently according to requirements, making the light-emitting device more adaptable.
[0057] Please refer to Figure 1 , Figure 2 and Figure 3 In some embodiments of this application, the circuit board 7 can be arranged parallel to the reflector 6. In this way, the circuit board 7 and the reflector 6 are more compact, which helps to reduce the size of the light-emitting device.
[0058] Please refer to Figure 1 , Figure 2 and Figure 3 In some embodiments of this application, the circuit board 7 and the reflector 6 are supported between the frame 31 and the cover 32. This structural configuration makes the installation of the circuit board 7 and the reflector 6 on the base 3 more stable and the installation process more convenient. During installation, the reflector 6 and the circuit board 7 are first placed between the frame 31 and the cover 32, and then the frame 31 and the cover 32 are fixed, so that the reflector 6 is sandwiched between the frame 31 and the cover 32, making the installation process relatively convenient.
[0059] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application.
[0060] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or at least two embodiments or examples.
[0061] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention.
Claims
1. A light-emitting device, characterized in that, include: Light-emitting components, used to emit light; A light-diffusing cover includes a first light-transmitting layer and a second light-transmitting layer. The first light-transmitting layer is made of polytetrafluoroethylene (PTFE), and the second light-transmitting layer has a higher rigidity than the first light-transmitting layer. The second light-transmitting layer and the first light-transmitting layer are disposed opposite to each other, with their sides abutting against each other. Along the arrangement direction of the second light-transmitting layer and the first light-transmitting layer, the second light-transmitting layer and the first light-transmitting layer are located on the same side of the light-emitting surface of the light-emitting element and are disposed opposite to the light-emitting surface.
2. The light-emitting device according to claim 1, characterized in that, The light-emitting element is used to emit ultraviolet light, and the material of the second light-transmitting layer is a cyclic block copolymer, quartz glass, or plastic.
3. The light-emitting device according to claim 1, characterized in that, The second light-transmitting layer is attached to the side of the first light-transmitting layer that is close to each other.
4. The light-emitting device according to claim 1, characterized in that, It also includes a base, and the second light-transmitting layer is fixedly connected to the base.
5. The light-emitting device according to claim 1, characterized in that, It also includes a base, the base having a receiving cavity with a first opening; the light-emitting element is disposed in the receiving cavity with the light-emitting surface facing the first opening; the light-diffusing cover is combined with the first opening, and the second light-transmitting layer is located on the side of the first light-transmitting layer near the light-emitting surface.
6. The light-emitting device according to claim 1, characterized in that, The light-emitting element is used to emit medium-wave ultraviolet light.
7. The light-emitting device according to claim 1, characterized in that, The wavelength of the ultraviolet light emitted by the light-emitting element is between 294 nanometers and 300 nanometers.
8. The light-emitting device according to any one of claims 1 to 6, characterized in that, It also includes a reflector, which is located on the side of the second light-transmitting layer and the first light-transmitting layer near the light-emitting surface. Along the first direction, the reflector is disposed on one side of the light-emitting surface, the arrangement direction of the second light-transmitting layer and the first light-transmitting layer is perpendicular to the first direction, and the reflector faces the light-emitting surface and the first light-transmitting layer.
9. The light-emitting device according to claim 8, characterized in that, The number of light-emitting elements is at least two, and the at least two light-emitting elements are spaced apart in the second direction. The arrangement direction of the second light-transmitting layer and the first light-transmitting layer is perpendicular to the second direction.
10. The light-emitting device according to claim 9, characterized in that, The reflector is located between the light-emitting surfaces of at least two of the light-emitting elements.
11. The light-emitting device according to claim 8, characterized in that, The reflector has a clearance through hole, the through hole being oriented in the same direction as the arrangement of the second light-transmitting layer and the first light-transmitting layer, and the light-emitting element is embedded in the clearance through hole.