An eye-protecting TIR lens and an eye-protecting lamp

Abstract

The utility model relates to the technical field of lighting, disclose a kind of eye protection TIR lens, eye protection lamps and lanterns, the eye protection TIR lens includes TIR lens body, light inlet and light outlet are arranged thereon, for realizing the transmission and reflection of light rays;And rui li scattering structure, setting on the light outlet, for the light rays that transmission to the TIR lens body is diffused and uniform light;Wherein, the rui li scattering structure includes the substrate layer setting on the light outlet, and diffusion particle is dispersed and arranged on the substrate layer.The utility model provides a kind of eye protection TIR lens, not only can effectively reduce the blue light proportion of emergent light and expand the diffusion angle of emergent blue light, to reach the purpose of reducing blue light intensity value, relieve eye crowd's eyes dry, fatigue and other symptoms, and rui li scattering structure can play certain diffusion effect to other spectrum, mixed light spot, to make the chroma of main illumination area keep consistency.

Description

Technical Field

[0001] This utility model relates to the field of lighting technology, specifically to an eye-protecting TIR lens and an eye-protecting lamp. Background Technology

[0002] In LED optical lens applications, TIR lenses are commonly used, primarily for beam angle designs below 50°. Because of this, TIR lenses often suffer from the following problems: 1. Due to its small beam angle, concentrated beam, and high central light intensity, the blue light intensity at the center of the beam is also stronger. Blue light refers to high-energy visible light with wavelengths between 400nm and 450nm. This type of light has strong penetrating power and can easily reach the retina. Therefore, prolonged exposure to high-energy blue light may cause eye strain, dry eyes, and even damage to retinal cells. This is the main reason why students, office workers, and other people who need to use their eyes for long periods of time experience dry and tired eyes.

[0003] 2. TIR lenses converge light rays from the edge of the light source to the edge of the target illumination spot. Since the light from the edge of the light source is generally yellowish, this results in a yellowish tint to the light at the edge of the illumination spot, which is more noticeable at small angles. To address this, existing TIR lenses typically add microstructures 12 (as shown in the attached image) to the surface of the lens 11. Figure 5 (as shown), or add microstructure 13 (as shown in the attached image) to the total reflection surface of lens 11. Figure 6 The method shown is used to mix light spots, resulting in low luminous efficacy and affecting the overall lighting effect of the lamp.

[0004] In summary, researching a TIR lens that can effectively reduce the penetration of blue light while ensuring luminous efficacy has a significant impact on improving the eye protection effect of lamps and protecting the vision of people who use their eyes. Utility Model Content

[0005] To address the shortcomings of the existing technology, this invention provides an eye-protecting TIR lens. Utilizing a Rayleigh scattering structure on the light-emitting section of the TIR lens body, it diffuses and homogenizes the light transmitted to the TIR lens body. This not only effectively reduces the proportion of blue light in the emitted light and expands the diffusion angle of the emitted blue light, thereby reducing the intensity of blue light and alleviating symptoms such as dry and tired eyes for users, but also allows the Rayleigh scattering structure to diffuse other spectra to a certain extent, mixing light spots to maintain consistent chromaticity in the main illumination area.

[0006] This utility model also provides an eye-protection lamp, which combines the lamp body with the aforementioned eye-protection TIR lens. While ensuring light efficiency, it can effectively reduce the penetrating power of blue light, thereby reducing the harm of blue light to users and improving the overall eye-protection effect of the lamp.

[0007] The technical effects to be achieved by this utility model are realized through the following technical aspects: In a first aspect, this utility model provides an eye-protecting TIR lens, comprising: The TIR lens body has a light-inlet section and a light-outlet section, which are used to realize the transmission and reflection of light to achieve the purpose of controlling the light. The light-inlet section is mainly used to realize the entry of light, and the light-outlet section is mainly used to realize the exit and divergence of light.

[0008] And a Rayleigh scattering structure is disposed on the light-emitting part to diffuse and homogenize the light transmitted to the TIR lens body.

[0009] The Rayleigh scattering structure includes a substrate layer disposed on the light-emitting part and diffusion particles dispersed on the substrate layer. The diffusion particles mainly diffuse the blue light from the light source. They can diffuse the blue light from the light source in both the light-in and light-out directions, so that the blue light from the light source accounts for about 50% in each direction, thereby effectively reducing the proportion of blue light in the emitted light. Moreover, after the blue light is diffused, the blue light portion will be diffused into a light distribution similar to an ellipse. Compared with the conventional light distribution angle (e.g., 15°, 24°, 36°), the diffusion angle can be effectively expanded, making the intensity distribution of emitted blue light more uniform and preventing the formation of glaring light in one direction. This can help relieve symptoms such as dry eyes and fatigue in people who use their eyes.

[0010] In addition, the Rayleigh scattering structure as a whole can diffuse other spectra to a certain extent, mixing light spots to keep the chromaticity of the main illumination area consistent.

[0011] As a preferred embodiment, the diffusing particles are titanium dioxide particles with an average particle size of 35nm-45nm. Using titanium dioxide particles to diffuse light not only significantly improves blue light utilization and yellow light transmission intensity, adapting to the optical needs of different scenarios such as cyan lights and LEDs, thus optimizing visual effects and improving device performance, but also, titanium dioxide is widely available and relatively inexpensive, reducing production costs for large-scale applications compared to other blue light scattering materials. Furthermore, titanium dioxide particles exhibit strong chemical stability, and when dispersed in the substrate layer, they are not easily degraded, ensuring long-term stability of the blue light diffusion effect. To further optimize the blue light diffusion effect and uniform light characteristics of the Rayli scattering structure, preferably, the weight ratio of the diffusing particles to the substrate layer is 1:250.

[0012] As one preferred embodiment, the overall thickness of the Rayleigh scattering structure is 1mm-25mm, which can effectively combine the overall light intensity, light efficiency, and eye protection effect of a TIR lens.

[0013] As a preferred embodiment, the TIR lens body and the Rayleigh scattering structure are separate structures. The Rayleigh scattering structure is bonded to the light-emitting part, or the Rayleigh scattering structure is ultrasonically welded to the light-emitting part. Preferably, the Rayleigh scattering structure is ultrasonically welded to the light-emitting part to reduce Fresnel loss between the two.

[0014] As one preferred embodiment, the TIR lens body and the Rayleigh scattering structure are integrally molded; by molding the two into one piece, not only can the consistency of the overall structure of the TIR lens be effectively guaranteed, but the process can also be effectively reduced and the production efficiency of the TIR lens can be improved.

[0015] As one preferred embodiment, the light-gathering section includes: A light inlet aperture is provided on one side of the TIR lens body to allow light from the light source to enter. A first light-incoming surface is disposed on the light-exiting end of the light-incoming aperture. It is an arc-shaped surface structure protruding from the light-incoming side of the light source, used to realize the transmission and refraction of light. Preferably, the first light-incoming surface is a smooth light-incoming surface structure.

[0016] As one preferred embodiment, the light-emitting section includes: The second light-inlet surface, corresponding to the light-inlet part, is an arc-shaped surface structure protruding from the light-emitting side of the light source, used to realize the transmission and refraction of light. And a light-emitting surface, which is disposed on the outer periphery of the second light-incoming surface, is used to realize the reflection and emission of light.

[0017] Preferably, the second light-incoming surface is a smooth light-incoming surface structure, and the light-outcoming surface is a smooth light-outcoming surface structure.

[0018] As one preferred embodiment, the TIR lens body has a total reflection surface on its outer periphery for reflecting and diffusing light; preferably, the total reflection surface is a smooth reflective surface structure.

[0019] As one preferred embodiment, the substrate layer is made of PMMA or PC material, and the TIR lens body is also made of PMMA or PC material. PMMA, also known as acrylic, has slightly lower temperature resistance but high light transmittance, especially ≥92% for 450nm blue light, effectively ensuring the transmission of light from the light source and guaranteeing overall light efficiency. PC, or polycarbonate, has slightly lower light transmittance than PMMA, but it has good high-temperature resistance and impact resistance, effectively ensuring the overall quality and stability of the TIR lens.

[0020] Secondly, this utility model provides an eye-protecting lamp, comprising: The lamp body is used to provide illumination; preferably, the lamp body can be an LED lamp commonly used in the prior art.

[0021] The eye-protecting TIR lens described above is mounted on the lamp body to achieve light transmission and diffusion; The light source assembly corresponds to the light-inlet portion of the eye-protection TIR lens and is disposed inside the lamp body, and the light emitted by the light source assembly is emitted to the outside through the eye-protection TIR lens.

[0022] In summary, this utility model has at least the following advantages: 1. The eye-protecting TIR lens provided by this utility model utilizes a Rayleigh scattering structure set on the light-emitting part of the TIR lens body to diffuse and homogenize the light transmitted to the TIR lens body. This not only effectively reduces the proportion of blue light in the emitted light and expands the diffusion angle of the emitted blue light to reduce the intensity of blue light and alleviate symptoms such as dry and tired eyes for users, but also the Rayleigh scattering structure can diffuse other spectra to a certain extent, mixing light spots to maintain the color consistency of the main illumination area.

[0023] 2. The eye-protection lamp provided by this utility model is made by combining the lamp body and the aforementioned eye-protection TIR lens. It can effectively reduce the penetrating power of blue light while ensuring light efficiency, thereby reducing the harm of blue light to users and improving the overall eye protection effect of the lamp. Attached Figure Description

[0024] Figure 1 This is a cross-sectional view of the eye-protecting TIR lens in an embodiment of this utility model.

[0025] Figure 2 This is a cross-sectional view of the TIR lens body in an embodiment of the present invention.

[0026] Figure 3 This is a cross-sectional view of the Rayleigh scattering structure in an embodiment of this utility model.

[0027] Figure 4 This is a schematic diagram of the overall structure of the eye-protecting lamp in the embodiment of this utility model.

[0028] Figure 5 This is a schematic diagram of the structure of a TIR lens in the background art. Figure 1 .

[0029] Figure 6 This is a schematic diagram of the structure of a TIR lens in the background art. Figure 2 .

[0030] Figure label: 10. Eye-protecting TIR lenses; 100. TIR lens body; 110. Light-entry section; 111. Light-entry aperture; 112. First light-entry surface; 120. Light-exit section; 121. Second light-entry surface; 122. Light-exit surface; 130. Total internal reflection surface; 200. Rayleigh scattering structure; 210. Substrate layer; 220. Diffusion particles; 20. The lamp body; 30. Light source assembly. Detailed Implementation

[0031] To facilitate understanding of this utility model, a more comprehensive description will be given below with reference to the accompanying drawings and specific embodiments. The drawings illustrate preferred embodiments of this utility model. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0032] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component.

[0033] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0034] 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 invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0035] Example 1: Please see the appendix Figure 1-3 The eye-protecting TIR lens 10 of this utility model includes a TIR lens body 100 having a light-inlet portion 110 and a light-outlet portion 120 thereon, and a Rayleigh scattering structure 200 disposed on the light-outlet portion 120; wherein, the Rayleigh scattering structure 200 includes a substrate layer 210 disposed on the light-outlet portion 120, and diffusion particles 220 dispersed on the substrate layer 210.

[0036] The TIR lens body 100 is used to transmit and reflect light to control it. The light-inlet section 110 is mainly used to allow light to enter, while the light-outlet section 120 is mainly used to allow light to exit and diffuse. The Rayleigh scattering structure 200 is used to diffuse and homogenize the light transmitted to the TIR lens body 100.

[0037] The diffusion particles 220 primarily diffuse blue light from the light source. They not only diffuse the blue light in both the incoming and outgoing directions, resulting in approximately 50% blue light in each direction, thus effectively reducing the proportion of blue light in the emitted light, but also diffuse the blue light into an elliptical distribution. Compared to conventional light distribution angles (e.g., 15°, 24°, 36°), this effectively expands the diffusion angle, making the intensity distribution of emitted blue light more uniform and preventing the formation of glaring light from a single direction. This helps alleviate symptoms such as dry eyes and eye fatigue in users.

[0038] In addition, the Rayleigh scattering structure 200 formed by the substrate layer 210 and the diffusion particles 220 can also diffuse other spectra to a certain extent and mix light spots so as to keep the chromaticity of the main illumination area consistent.

[0039] Please see the appendix Figure 2 The TIR lens body 100 has a total reflection surface 130 on its outer periphery for reflecting and diffusing light. Preferably, the total reflection surface 130 is a smooth curved reflective surface structure, which can cause total internal reflection of light rays incident on it, so that the reflected light rays are guided to the main beam path.

[0040] Furthermore, in some embodiments, the TIR lens body 100 is made of PMMA or PC material. PMMA, also known as acrylic, has slightly lower temperature resistance but high light transmittance, especially ≥92% transmittance for 450nm blue light, which can effectively ensure the transmission of light from the light source to guarantee the overall light efficiency. PC, or polycarbonate, has slightly lower light transmittance than PMMA, but it has good high temperature resistance and impact resistance, which can effectively ensure the overall quality and stability of the TIR lens.

[0041] Please see the appendix Figure 1-2 In some embodiments, the light-inlet portion 110 includes a light-inlet aperture 111 disposed on one side of the TIR lens body 100 for allowing light from the light source to enter; and a first light-inlet surface 112 disposed on the light-outlet end of the light-inlet aperture 111, which is an arc-shaped surface structure protruding from the light-inlet side of the light source. Preferably, the light-inlet aperture 111 is a trumpet-shaped structure that is narrower near the first light-inlet surface 112 and wider near the light source, which can better collect the light emitted by the light source.

[0042] The first light-entry surface 112 is mainly used for light transmission and refraction. Its arc-shaped surface structure, protruding from the light-entry side of the light source, allows the light incident on it to be concentrated and refracted towards the center of the TIR lens body 100. This not only improves the focusing ability of the light source beam and increases the central light intensity to extend the illumination distance, but also reduces light leakage loss during the light-entry stage. More preferably, the first light-entry surface 112 has a smooth light-entry surface structure, which facilitates the passage of light and helps maintain the optical efficiency of the TIR lens at over 90%.

[0043] Please see the appendix Figure 1-2 In some embodiments, the light-emitting part 120 includes a second light-incoming surface 121, which is a curved surface structure protruding from the light-emitting side of the light source and corresponding to the light-incoming part 110; and a light-emitting surface 122 disposed on the outer periphery of the second light-incoming surface 121 for realizing light reflection and emission. The second light-incoming surface 121 is mainly used to realize light transmission and refraction. Its curved surface structure design protruding from the light-emitting side of the light source not only reflects tangential light rays at small angles, but also pre-shapes light rays incident at different angles, making the propagation path of light rays after entering the lens more regular and avoiding layering of emitted light rays. It also prevents defects such as "hot spots" or "donut shapes" from appearing in the light spot, making the brightness transition between the center and the edge of the light spot more natural and soft. Preferably, the second light-incoming surface 121 is a smooth light-incoming surface structure, and the light-emitting surface 122 is a smooth light-emitting surface structure; this facilitates the passage of light better and further helps the optical efficiency of the TIR lens to be maintained above 90%.

[0044] Furthermore, in some embodiments, the TIR lens body 100 and the Rayleigh scattering structure 200 are separate structures; and the Rayleigh scattering structure 200 can be bonded to the light-emitting part 120 by adhesive bonding, or the Rayleigh scattering structure 200 can be welded to the light-emitting part 120 by ultrasonic welding, which can be selected and designed according to actual needs. Preferably, the Rayleigh scattering structure 200 is welded to the light-emitting part 120 by ultrasonic welding to reduce Fresnel loss between the two.

[0045] Furthermore, in some embodiments, the TIR lens body 100 and the Rayleigh scattering structure 200 are integrally injection molded structures, which can not only effectively ensure the consistency of the overall structure of the TIR lens, but also effectively reduce the number of processes and improve the production efficiency of the TIR lens.

[0046] The eye-protecting TIR lens 10 in this embodiment utilizes a Rayleigh scattering structure 200 disposed on the light-emitting part 120 of the TIR lens body 100 to diffuse and homogenize the light transmitted to the TIR lens body 100. This not only effectively reduces the proportion of blue light in the emitted light and expands the diffusion angle of the emitted blue light to reduce the intensity of blue light and alleviate symptoms such as dry and tired eyes for users, but also allows the Rayleigh scattering structure 200 to diffuse other spectra to a certain extent, mixing light spots to maintain the color consistency of the main illumination area.

[0047] Example 2: Please see the appendix Figure 1-3 The eye-protecting TIR lens 10 of this embodiment is the same as that in Embodiment 1, both including a TIR lens body 100 with a light-inlet portion 110 and a light-outlet portion 120 disposed thereon, and a Rayleigh scattering structure 200 disposed on the light-outlet portion 120; wherein, the Rayleigh scattering structure 200 includes a substrate layer 210 disposed on the light-outlet portion 120, and diffusion particles 220 dispersed on the substrate layer 210. The main difference is: The diffusion particles 220 are titanium dioxide particles with an average particle size of 35nm-45nm. Using titanium dioxide particles to diffuse light not only significantly improves blue light utilization and yellow light transmission intensity, adapting to the optical needs of different scenarios such as blue sky lights and LEDs, thus optimizing visual effects and improving device performance, but also, titanium dioxide is widely available and relatively inexpensive, reducing production costs for large-scale applications compared to other blue light scattering materials. Furthermore, the strong chemical stability of titanium dioxide particles, dispersed in the substrate layer 210, prevents deterioration and ensures long-term stability of the blue light diffusion effect. To further optimize the blue light diffusion effect and uniform light characteristics of the Rayleigh scattering structure 200, preferably, the weight ratio of diffusion particles 220 to the substrate layer 210 is 1:250.

[0048] Furthermore, in some embodiments, the substrate layer 210 is selected as a PMMA or PC material. PMMA, also known as acrylic, has slightly lower temperature resistance but high light transmittance, especially ≥92% transmittance for 450nm blue light, which can effectively ensure the transmission of light from the light source to ensure overall light efficiency; PC is polycarbonate, which has slightly lower light transmittance than PMMA, but has good high temperature resistance and impact resistance, which can effectively ensure the overall quality and stability of the TIR lens.

[0049] The substrate layer 210 is made of the same transparent optical grade PMMA or PC material as the TIR lens body 100. This not only achieves the same high transmittance and high stability as the TIR lens body 100, but also effectively improves the consistency and stability of the combination between the TIR lens body 100 and the Rayleigh scattering structure 200, thereby effectively improving the overall quality and safety of the TIR lens.

[0050] Furthermore, the overall thickness of the Ruili scattering structure 200 is 1mm-25mm, which can effectively combine the light intensity, light efficiency and eye protection effect of the TIR lens.

[0051] The eye-protecting TIR lens 10 in this embodiment, based on embodiment 1, further designs and optimizes the Rayleigh scattering structure 200, which can further and effectively improve the quality, uniformity and safety of the TIR lens while achieving the technical effect of embodiment 1.

[0052] Example 3: Please see the appendix Figure 4 The eye-protecting lamp of this utility model embodiment includes a lamp body 20 for providing illumination, an eye-protecting TIR lens 10 as described in embodiment 1 or 2, disposed on the lamp body 20, and a light source assembly 30 disposed inside the lamp body 20 corresponding to the light-inlet portion 110 of the eye-protecting TIR lens 10, wherein the light emitted by the light source assembly 30 passes through the eye-protecting TIR lens 10 and is emitted to the outside. The eye-protecting TIR lens 10 is used to realize the transmission and diffusion of light; the light source assembly 30 is used to provide the energy source for illumination. Preferably, the lamp body 20 can be selected as a commonly used LED lamp in the prior art, and the light source assembly 30 can be selected as a commonly used LED light source assembly in the prior art.

[0053] The eye-protection lamp in this embodiment is formed by combining the lamp body 20, the light source assembly 30 and the eye-protection TIR lens 10 in embodiment 1 or 2. It can effectively reduce the penetration of blue light while ensuring light efficiency, so as to reduce the damage of blue light to the users and improve the overall eye protection effect of the lamp.

[0054] As can be seen from the technical solutions of the above embodiments, this utility model provides an eye-protecting TIR lens, which can not only effectively reduce the proportion of blue light in the emitted light and expand the diffusion angle of the emitted blue light to reduce the intensity of blue light and alleviate symptoms such as dry eyes and fatigue in users, but also the Rayleigh scattering structure can play a certain role in diffusing other spectra and mixing light spots to keep the chromaticity of the main illumination area consistent. This utility model also provides an eye-protecting lamp that uses this eye-protecting TIR lens, which can effectively reduce the penetrating power of blue light while ensuring light efficiency, thereby reducing the harm of blue light to users and improving the overall eye-protection effect of the lamp.

[0055] The above description is merely an example and illustration of the structure of this utility model, and while the description is quite specific and detailed, it should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these obvious substitutions all fall within the protection scope of this utility model.

Claims

1. An eye-protecting TIR lens, characterized in that, include: The TIR lens body has an input light section and an output light section, which are used to realize the transmission and reflection of light. And a Rayleigh scattering structure is disposed on the light-emitting part to diffuse and homogenize the light transmitted to the TIR lens body; The Rayleigh scattering structure includes a substrate layer disposed on the light-emitting part and diffusion particles dispersed on the substrate layer.

2. The eye-protecting TIR lens according to claim 1, characterized in that, The diffusion particles are titanium dioxide particles with an average particle size of 35nm-45nm.

3. The eye-protecting TIR lens according to claim 1, characterized in that, The overall thickness of the Ruili scattering structure is 1mm-25mm.

4. The eye-protecting TIR lens according to claim 1, characterized in that, The TIR lens body and the Rayleigh scattering structure are separate structures; the Rayleigh scattering structure is bonded to the light-emitting part, or the Rayleigh scattering structure is ultrasonically welded to the light-emitting part.

5. The eye-protecting TIR lens according to claim 1, characterized in that, The TIR lens body and the Rayleigh scattering structure are integrally injection molded.

6. The eye-protecting TIR lens according to claim 1, characterized in that, The light-gathering part includes: A light inlet aperture is provided on one side of the TIR lens body to allow light from the light source to enter. And a first light-inlet surface, which is disposed on the light-outlet end of the light-inlet hole, is an arc-shaped surface structure protruding on the light-inlet side of the light source, used to realize the transmission and refraction of light.

7. The eye-protecting TIR lens according to claim 1, characterized in that, The light-emitting part includes: The second light-inlet surface, corresponding to the light-inlet part, is an arc-shaped surface structure protruding from the light-emitting side of the light source, used to realize the transmission and refraction of light. And a light-emitting surface, which is disposed on the outer periphery of the second light-incoming surface, is used to realize the reflection and emission of light.

8. The eye-protecting TIR lens according to claim 1, characterized in that, The TIR lens body has a total reflection surface on its outer periphery to achieve light reflection and diffusion.

9. The eye-protecting TIR lens according to claim 1, characterized in that, The substrate layer is made of PMMA or PC material, and the TIR lens body is made of PMMA or PC material.

10. An eye-protecting lamp, characterized in that, include: The lamp body is used to provide illumination; The eye-protecting TIR lens according to any one of claims 1-9 is disposed on the lamp body; The light source assembly corresponds to the light-inlet portion of the eye-protection TIR lens and is disposed inside the lamp body, and the light emitted by the light source assembly is emitted to the outside through the eye-protection TIR lens.

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