Ultrathin anti-dazzle COB lens

Abstract

The utility model provides an ultrathin anti-dazzle COB lens which comprises a PCB lamp panel, COB lamp beads are arranged on the PCB lamp panel, a heat dissipation frame structure is arranged above the COB lamp beads, an ultrathin Fresnel optical structure is adopted by an optical part of the lens, so that the product is thinner and lighter, and the weight and the production cost are reduced. The light transmittance is high, the good light transmission effect is guaranteed, and the illumination quality is improved. Light rays are effectively scattered through the anti-dazzle structure, dazzle is reduced, stimulation to human eyes is reduced, and the use comfort is improved. An external anti-dazzle cover is saved, the product cost is reduced, and meanwhile the product structure is simplified. And the four positioning columns are arranged at the bottom of the support structure, so that accurate assembly and positioning of the lens and the PCB are ensured, the lens and the PCB are prevented from moving in the transportation and use processes, and the stability of the product is ensured. The heat of the PCB is conducted out through the support structure, the heat dissipation effect is improved, the working temperature of the lamp beads can be reduced, and the service life of the lamp beads is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of lenses, in particular to an ultra-thin anti-glare COB lens. Background Art

[0002] With the development of LED technology, the development of lamp beads has become increasingly mature, leading to the emergence of high-power COB lamp beads. With the advent of COB lamp beads, COB lenses have also emerged. Currently, COB lenses are widely used in commercial lighting, architectural lighting, and home lighting, and have a promising market development prospect.

[0003] Chinese utility model patent application number: CN201720170453.8 proposes a COB lens structure, which is integrally formed and equipped with several auxiliary lenses. The COB lens structure is in the shape of a bowl, and a circle of grooves is provided on the plane of the edge of the bowl. The inner wall of the bowl is plated with a fish-scale reflective layer; the bottom of the bowl is provided with a cylindrical cavity, and the wall of the cylindrical cavity is provided with a thread; the bottom of the bowl is provided with a lower convex lens, the convex surface of the lower convex lens faces downward, and a circle of concave ring is provided along the edge of the lower convex lens, which is used to position the COB-type LED module; a COB-type LED module storage cavity is provided below the lower convex lens, and the COB-type LED module storage cavity is sufficient for the light of the COB-type LED module to diverge to the fish-scale reflective layer.

[0004] However, the existing COB lenses have some shortcomings during use and still need to be improved:

[0005] First, the size and thickness of COB lenses are relatively large, which leads to production cost issues caused by heavy weight;

[0006] The second is the difficulty in heat dissipation of COB lenses;

[0007] The third is the glare problem caused by the angle of the COB lens;

[0008] Therefore, we have made improvements to this problem and proposed an ultra-thin anti-glare COB lens. Utility Model Content

[0009] The purpose of the present invention is to address the problems raised by the existing background technology. In order to achieve the above-mentioned purpose of the utility model, the present invention provides the following technical solutions: an ultra-thin anti-glare COB lens, comprising a PCB light board, wherein the PCB light board is provided with COB lamp beads, a heat dissipation frame structure is provided above the COB lamp beads, a lens optical part is provided above the heat dissipation frame structure, the lens optical part adopts an ultra-thin Fresnel optical structure, an anti-glare structure is provided at the upper end of the lens optical part, and a bracket structure is provided at the lower end of the lens optical part.

[0010] As a preferred technical solution of the present invention, four positioning columns are provided at the bottom of the support structure.

[0011] As a preferred technical solution of the present invention, the positioning post is assembled and positioned with the PCB board.

[0012] As a preferred technical solution of the present invention, the shape of the anti-glare structure includes circle, square and polygon.

[0013] As a preferred technical solution of the present invention, the shape of the bracket includes flat plate, arc, and trapezoid.

[0014] As a preferred technical solution of the present invention, the support structure is arranged below the lens.

[0015] As a preferred technical solution of the present invention, the bracket structure is positioned by using two columns or by buckling.

[0016] As a preferred technical solution of the present invention, a heat dissipation groove is provided at the bottom of the support structure.

[0017] As a preferred technical solution of the present invention, the anti-glare structure adopts a nano coating with a coating thickness of 0.03 mm to 0.08 mm.

[0018] As a preferred technical solution of the present invention, the heat dissipation frame structure adopts a V-shaped structure.

[0019] Compared with the existing technology, the beneficial effects of this utility model are as follows: In the solution of this utility model, the lens optical part adopts an ultra-thin Fresnel optical structure, making the product thinner and lighter, reducing weight and production costs. The high light transmittance ensures good light transmission effect and improves lighting quality.

[0020] The anti-glare structure, including the microstructure surface treatment described in Example 2 and the nano-coating described in Example 3, effectively scatters light, reduces glare, minimizes eye irritation, and improves user comfort. This eliminates the need for an external anti-glare cover, reduces overall product cost, and simplifies the product structure.

[0021] Four positioning posts at the bottom of the bracket structure ensure accurate assembly and positioning of the lens and PCB, preventing movement during transportation and use, and ensuring product stability. The bracket structure conducts heat away from the PCB, reducing the operating temperature of the lamp beads by 5°C in Example 2 and by 8°C in Example 3, extending the lamp life and improving product reliability.

[0022] Through the heat dissipation frame structure: the V-shaped structure is adopted, which is conducive to improving the heat dissipation efficiency, quickly dissipating the heat generated by the COB lamp beads, and ensuring the normal operation of the lamp.

[0023] Positioning posts: Attach to the PCB assembly to prevent the lens from moving during transport, ensuring product safety and stability. Heat from the PCB is transferred to the bracket, increasing heat dissipation, helping to lower the operating temperature of the lamp and extend its lifespan. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic diagram of the structure provided by the utility model;

[0025] Figure 2 A schematic diagram of the support structure provided by the utility model;

[0026] Figure 3 A schematic diagram of the anti-glare structure provided by the utility model;

[0027] Figure 4 This is a schematic diagram of the positioning column structure provided by the utility model.

[0028] Indicated in the figure:

[0029] 1. PCB light board; 2. COB lamp beads; 3. Heat dissipation frame structure; 301. Heat dissipation slot; 4. Lens optical part; 5. Anti-glare structure; 6. Bracket structure; 601. Positioning column. DETAILED DESCRIPTION

[0030] To make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be described clearly and completely in conjunction with the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them.

[0031] Therefore, the following detailed description of the embodiments of the present invention is not intended to limit the scope of the claimed invention, but merely represents some embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. It should be noted that, in the absence of conflict, the embodiments of the present invention and the features and technical solutions therein can be combined with each other. It should be noted that similar numbers and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0032] Example 1: Please refer to Figure 1-Figure 4 , an ultra-thin anti-glare COB lens, including a PCB light board 1, a COB lamp bead 2 is arranged on the PCB light board 1, a heat dissipation frame structure 3 is arranged above the COB lamp bead 2, a lens optical part 4 is arranged above the heat dissipation frame structure 3, the lens optical part 4 adopts an ultra-thin Fresnel optical structure, an anti-glare structure 5 is arranged at the upper end of the lens optical part 4, and a bracket structure 6 is arranged at the lower end of the lens optical part 4. Four positioning columns 601 are arranged at the bottom of the bracket structure 6. The positioning columns 601 are assembled and positioned with the PCB board. The shapes of the anti-glare structure 5 include circular, square, and polygonal. The shapes of the bracket include flat, arc, and trapezoidal. The bracket structure 6 is arranged below the lens. The positioning method of the bracket structure 6 adopts two column positioning, or buckle positioning. A heat dissipation groove 301 is provided at the bottom of the bracket structure 6.

[0033] The anti-glare structure 5 uses a nano-coating with a thickness of 0.03mm to 0.08mm. The heat sink structure 3 adopts a V-shaped structure. The lens optical part 4 adopts an ultra-thin Fresnel optical structure, making the product thinner, more portable, and lighter, thereby reducing production costs.

[0034] Adding an anti-glare structure 5 to the upper end of the lens helps reduce glare, eliminating the need for an external anti-glare cover, saving the cost of a component and lowering the overall product cost. Adding a bracket structure 6 to the lower end of the lens, with four positioning posts 601 at the bottom, serves two purposes: first, to position the lens with the PCB to prevent movement during transport; second, to conduct heat from the PCB to the bracket after assembly, thereby increasing heat dissipation.

[0035] Example 2: An ultra-thin anti-glare COB lens. The COB lens utilizes a Fresnel optical structure made of high-transmittance optical plastic. The Fresnel optical structure is 0.5mm thick and achieves 92% transmittance. Precision injection molding ensures that its optical performance meets requirements, with an injection molding accuracy of ±0.05mm. The anti-glare structure 5 utilizes a microstructured surface treatment, creating uniform, tiny protrusions above the lens. These protrusions are 0.1mm high and spaced 0.2mm apart to scatter light and reduce glare.

[0036] The bracket structure 6 is made of aluminum alloy with a thermal conductivity of 200 W / (m·K). It is manufactured through a stamping process and includes heat dissipation slots 301 with a depth of 1 mm and a width of 2 mm. Four positioning posts 601 are located at the bottom of the bracket. These posts have a diameter of 2 mm and a height of 3 mm to ensure accurate assembly with the PCB and good thermal conductivity.

[0037] The Fresnel optical structure, the anti-glare structure 5 and the bracket structure 6 are assembled by gluing with a bonding strength of 10 MPa to ensure that the parts are firmly connected and the optical performance is not affected.

[0038] In actual use, the assembled ultra-thin anti-glare COB lens is mounted on the COB lamp and assembled with the PCB. Positioning posts 601 secure the lens to the PCB, ensuring it does not move during transportation and use. Furthermore, the bracket structure 6 conducts heat away from the PCB, reducing the lamp's operating temperature by 5°C under the same operating conditions.

[0039] Example 3: An ultra-thin anti-glare COB lens. This lens utilizes optical glass to create a Fresnel optical structure. A photolithography process forms Fresnel patterns on the glass surface, achieving ultra-thin optics. The Fresnel optical structure is 0.3 mm thick. The optical glass is coated to increase its light transmittance to 95%.

[0040] The anti-glare structure 5 uses a nano-coating, which coats the lens with a layer of nano-material with anti-glare properties. The nano-coating has a thickness of 0.05mm and can effectively scatter light and reduce glare, reducing the glare index to 19 without affecting the light transmittance of the lens.

[0041] Bracket structure 6 is made of ceramic material with a thermal conductivity of 25W / (m·K). This high thermal conductivity and insulation of ceramic improve heat dissipation and electrical safety. Four positioning posts 601 are located at the bottom of the bracket and are secured to the PCB using screws. The screws are 3mm in diameter and 5mm in length, ensuring a secure connection.

[0042] Assemble the Fresnel optical structure, anti-glare structure 5, and support structure 6. Use optical glue to stick the Fresnel optical structure and anti-glare structure 5 to the support structure 6. The optical glue has a refractive index of 1.5 and a bonding strength of 8 MPa to ensure the tight connection of each part and the consistency of optical performance.

[0043] In actual use, the assembled ultra-thin anti-glare COB lens is mounted on the COB lamp and assembled with the PCB. Positioning posts 601 and screws secure the lens to the PCB, ensuring stability and reliability. Furthermore, the ceramic support structure 6 quickly conducts heat away. Testing has shown that under the same operating conditions, it can reduce the operating temperature of the lamp by 8°C, extending its lifespan.

[0044] Example 4: An ultra-thin anti-glare COB lens. This lens utilizes a polymer material to create a Fresnel optical structure, produced through a hot-pressing process to achieve an ultra-thin lens shape. The Fresnel optical structure is 0.4 mm thick. A light diffuser (3%) is added to the material to improve light uniformity and scattering, further reducing glare.

[0045] The anti-glare structure 5 is a ring-shaped grille structure, formed by injection molding above the lens. The grille has a pitch of 0.15mm and a height of 0.08mm, achieving the best anti-glare effect and reducing the glare index to 18.

[0046] Bracket structure 6 is made of magnesium alloy with a thermal conductivity of 150 W / (m·K). This lightweight and high thermal conductivity of magnesium alloy reduces overall weight and improves heat dissipation. Four positioning posts 601 are located at the bottom of the bracket. These posts have a diameter of 1.5 mm and a height of 2.5 mm. They utilize a plug-in connection for quick and easy assembly with the PCB.

[0047] The Fresnel optical structure, the anti-glare structure 5 and the bracket structure 6 are assembled. The various parts are connected together by ultrasonic welding with a welding strength of 12 MPa to ensure the connection strength and sealing.

[0048] In actual use, the assembled ultra-thin anti-glare COB lens is mounted on the COB lamp and assembled with the PCB. The lens is quickly secured to the PCB using the plug-in connection of the positioning posts 601. The magnesium alloy support structure 6 effectively dissipates heat. Testing has shown that under the same operating conditions, it can reduce the operating temperature of the lamp by 6°C, improving the reliability and stability of the lamp.

[0049] The lens is mainly composed of a PCB light board 1, COB lamp beads, a heat dissipation frame structure 3, a lens optical part 4, an anti-glare structure 5 and a bracket structure 6.

[0050] When current flows through the PCB 1, the COB lamp beads emit light. The heat generated by the COB lamp beads is transferred to the heat dissipation frame 3 above. The heat dissipation frame 3 adopts a V-shaped structure, which is conducive to improving heat dissipation efficiency and quickly dissipating heat.

[0051] The lens optical part 4 adopts an ultra-thin Fresnel optical structure, which makes the product thinner and lighter, thereby reducing production costs and making the product more portable.

[0052] An anti-glare structure 5 is provided at the upper end of the lens optical portion 4. This structure utilizes a nano-coating with a thickness of 0.03mm to 0.08mm and can be shaped in various shapes, including circular, square, and polygonal. This anti-glare structure 5 effectively reduces glare and eye irritation, while also eliminating the need for an external anti-glare shield and lowering overall product cost.

[0053] A support structure 6 is located at the lower end of the lens optical portion 4. The support structure can be shaped like a flat plate, an arc, or a trapezoid. The support structure 6 is positioned below the lens, and four positioning posts 601 are located at its base. These posts 601 align with the PCB to ensure the lens does not move during transport. Furthermore, after assembly with the PCB, they transfer heat from the PCB to the support structure, enhancing heat dissipation through the heat sink 301 at the bottom of the support structure, thus improving the heat dissipation performance of the entire system.

[0054] Experimental Example 1:

[0055] Experimental purpose: To test the optical performance and heat dissipation performance of ultra-thin anti-glare COB lens.

[0056] Experimental materials: ultra-thin anti-glare COB lens, COB lamp beads, PCB board, thermal imager.

[0057] Experimental steps:

[0058] 1. Assemble the Fresnel optical structure, the anti-glare structure 5 and the bracket structure 6 to form a complete ultra-thin anti-glare COB lens.

[0059] 2. Install the assembled ultra-thin anti-glare COB lens on the COB lamp bead and assemble it with the PCB board.

[0060] 3. Turn on the COB lamp bead and let it run for a period of time under normal working conditions. Use a thermal imager to record the operating temperature of the lamp bead.

[0061] 4. Turn off the COB lamp bead, wait for it to cool to room temperature, turn it on again and repeat the above steps. Perform the experiment three times in total and take the average value as the final result.

[0062] Experimental data:

[0063] Light transmittance: 92%; Injection molding accuracy: ±0.05mm; Bump height: 0.1mm; Bump spacing: 0.2mm; Aluminum alloy thermal conductivity: 200W / (m·K); Positioning column 601 diameter: 2mm; Positioning column 601 height: 3mm; Operating temperature reduction: 5°C;

[0064] Data Analysis:

[0065] The light transmittance is 92%, indicating that the lens has good optical transmittance.

[0066] The injection molding accuracy is controlled within ±0.05mm, ensuring the consistency and quality of the product.

[0067] The aluminum alloy bracket has high thermal conductivity, which helps to effectively dissipate heat, reducing the operating temperature of the lamp beads by 5°C and improving the stability and life of the lamp.

[0068] in conclusion:

[0069] The ultra-thin anti-glare COB lens in Experimental Example 1 successfully reduces the operating temperature of the lamp beads and improves the overall performance of the lamp through efficient heat dissipation design while ensuring high light transmittance.

[0070] Experimental Example 2:

[0071] Experimental purpose: To test the optical performance and heat dissipation performance of ultra-thin anti-glare COB lens.

[0072] Experimental materials: ultra-thin anti-glare COB lens, COB lamp beads, PCB board, thermal imager.

[0073] Experimental steps:

[0074] 1. Assemble the Fresnel optical structure, the anti-glare structure 5 and the bracket structure 6 to form a complete ultra-thin anti-glare COB lens.

[0075] 2. Install the assembled ultra-thin anti-glare COB lens on the COB lamp bead and assemble it with the PCB board.

[0076] 3. Turn on the COB lamp bead and let it run for a period of time under normal working conditions. Use a thermal imager to record the operating temperature of the lamp bead.

[0077] 4. Turn off the COB lamp bead, wait for it to cool to room temperature, turn it on again and repeat the above steps. Perform the experiment three times in total and take the average value as the final result.

[0078] Experimental data:

[0079] Light transmittance: 95%; Nano coating thickness: 0.05mm; Glare index reduced to: 19; Ceramic thermal conductivity: 25W / (m·K); Screw diameter: 3mm; Screw length: 5mm; Operating temperature reduced: 8°C;

[0080] Data Analysis:

[0081] The transmittance is increased to 95%, showing higher optical efficiency.

[0082] Nano-coating significantly reduces glare index to 18, improving light quality.

[0083] Although the ceramic bracket has low thermal conductivity, good heat conduction is ensured by screw fixation, which reduces the operating temperature by 8°C, which is better than Experimental Example 1.

[0084] in conclusion:

[0085] The lens of Experimental Example 2 performed better in terms of improving light transmittance and reducing glare. Although ceramic materials with lower thermal conductivity were used, better heat dissipation was achieved through effective mechanical fixing.

[0086] Experimental Example 3:

[0087] Experimental purpose: To test the optical performance and heat dissipation performance of ultra-thin anti-glare COB lens.

[0088] Experimental materials: ultra-thin anti-glare COB lens, COB lamp beads, PCB board, thermal imager.

[0089] Experimental steps:

[0090] 1. Assemble the Fresnel optical structure, the anti-glare structure 5 and the bracket structure 6 to form a complete ultra-thin anti-glare COB lens.

[0091] 2. Install the assembled ultra-thin anti-glare COB lens on the COB lamp bead and assemble it with the PCB board.

[0092] 3. Turn on the COB lamp bead and let it run for a period of time under normal working conditions. Use a thermal imager to record the operating temperature of the lamp bead.

[0093] 4. Turn off the COB lamp bead, wait for it to cool to room temperature, turn it on again and repeat the above steps. Perform the experiment three times in total and take the average value as the final result.

[0094] Experimental data:

[0095] Ring grid spacing: 0.15mm; Ring grid height: 0.08mm; Magnesium alloy thermal conductivity: 150W / (m·K); Positioning column 601 diameter: 1.5mm; Positioning column 601 height: 2.5mm; Operating temperature reduction: 6°C;

[0096] Data Analysis:

[0097] As transmittance data are not provided, the optical performance cannot be directly evaluated.

[0098] The ring grille design effectively reduces glare and improves visual comfort.

[0099] The magnesium alloy bracket provides good thermal conductivity, which reduces the operating temperature by 6°C, slightly lower than the previous two experimental cases.

[0100] in conclusion:

[0101] The lens in Experimental Example 3 performs well in reducing glare, but a lack of transmittance data makes it difficult to fully evaluate its optical performance. Heat dissipation is good, but slightly inferior to that of Experimental Example 2.

[0102] The above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described in the present invention. Although this specification has described the present invention in detail with reference to the above embodiments, the present invention is not limited to the above specific implementation methods. Therefore, any modification or equivalent replacement of the present invention; and all technical solutions and improvements thereof that do not depart from the spirit and scope of the present invention are included in the scope of the claims of the present invention.

Claims

1. An ultra-thin anti-glare COB lens, comprising a PCB light board (1), characterized in that: The PCB lamp board (1) is provided with a COB lamp bead (2), a heat dissipation frame structure (3) is provided above the COB lamp bead (2), a lens optical part (4) is provided above the heat dissipation frame structure (3), the lens optical part (4) adopts an ultra-thin Fresnel optical structure, an anti-glare structure (5) is provided at the upper end of the lens optical part (4), and a bracket structure (6) is provided at the lower end of the lens optical part (4).

2. The ultra-thin anti-glare COB lens according to claim 1, characterized in that: Four positioning columns (601) are provided at the bottom of the support structure (6).

3. The ultra-thin anti-glare COB lens according to claim 2, characterized in that: The positioning column (601) is assembled and positioned with the PCB board.

4. The ultra-thin anti-glare COB lens according to claim 1, characterized in that: The anti-glare structure (5) is circular or square in shape.

5. The ultra-thin anti-glare COB lens according to claim 1, characterized in that: The support structure (6) is in the shape of a flat plate or an arc.

6. The ultra-thin anti-glare COB lens according to claim 5, characterized in that: The support structure (6) is arranged below the lens.

7. The ultra-thin anti-glare COB lens according to claim 6, characterized in that: The support structure (6) is positioned by two columns or by buckling.

8. The ultra-thin anti-glare COB lens according to claim 7, characterized in that: A heat dissipation groove (301) is provided at the bottom of the support structure (6).

9. The ultra-thin anti-glare COB lens according to claim 1, characterized in that: The anti-glare structure (5) adopts a nano coating with a coating thickness of 0.03 mm to 0.08 mm.

10. The ultra-thin anti-glare COB lens according to claim 1, characterized in that: The heat dissipation frame structure (3) adopts a V-shaped structure.

Images