Polyhedral color-mixed optical structure and manufacturing method thereof
By adopting a combination design of a multihedral color mixing optical structure and a reflective film and film transmissive layer in dimming and color-tuning lamps, the shortcomings of existing lamps in light mixing effects are solved, and better light color consistency and beam angle adjustment are achieved.
Patent Information
- Application Number
- CN202510118067.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-24
- Publication Date
- 2025-03-18
AI Technical Summary
When realizing the light mixing effect, existing dimming and color-tuning lamps have problems such as poor spot cutoff, glare, poor spot adjustability and small beam angle adjustability.
The polyhedral color-mixed optical structure is adopted, and the light-input surface and the light-out surface are arranged inside the polyhedral and fully reflect and fuse in the polyhedral cavity, combining the design of the reflective film and the film-transmitting layer to achieve consistency of light and color and full fusion of various colors.
The light mixing effect of mixed color light is improved, the color consistency is ensured, the adjustable range of beam angle is enhanced, and the problems of glare and poor spot cutoff are reduced.
Smart Images
Figure CN119642136A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of general lighting, and in particular to a polyhedral color mixing optical structure and a manufacturing method thereof. Background Art
[0002] As people's requirements for intelligent lighting increase, many high-end commercial and entertainment venues, museums, photo studios, parks, high-end office buildings and homes use intelligent dimming and color adjustment lamps to achieve the best lighting effects.
[0003] For dimming and color adjustment lamps, since each color LED emits light separately, the light type of the lamp will produce various color patches. When using multiple color LEDs to achieve more accurate dimming and color adjustment, mixing light and color is the biggest pain point and difficulty.
[0004] At present, most conventional dimming and color adjustment solutions on the market use diffusion plates. The disadvantages of using diffusion plates are poor light spot cutoff, glare, poor light spot adjustability, and a small range of beam angle adjustability. Summary of the invention
[0005] In order to achieve a good light mixing effect and solve the problems of glare, poor cutoff, poor light spot adjustability, and small adjustable range of beam angle of the diffusion plate solution, the present application provides a polyhedron color mixing optical structure and a manufacturing method thereof.
[0006] In a first aspect, the present application provides a polyhedral color mixing optical structure, which adopts the following technical solution: A polyhedron color mixing optical structure comprises a polyhedron, wherein the interior of the polyhedron is transparent, one end of the polyhedron is provided with a light incident surface, and the other end of the polyhedron is provided with a light emitting surface.
[0007] By adopting the above technical solution, the light emitted by each color LED is squeezed into the cavity of the polyhedron from the light incident surface, is fully reflected and integrated in the cavity, and is emitted from the light output surface after reaching a good consistency. The light emitted after adjustment by the polyhedron has good color consistency and each color of light is fully integrated, which is beneficial to improving the mixing effect of the mixed color light.
[0008] Optionally, a reflective film is provided on the peripheral side surfaces of the polyhedron.
[0009] By adopting the above technical solution, when light enters the inner wall of the polyhedron cavity from the light incident surface, the reflective film reflects the light, and finally causes the light to be emitted from the light emitting surface, which is beneficial to ensure the reflection effect of the polyhedron and improve the stability of light emitted from the light emitting surface.
[0010] Optionally, the reflective film is a multi-layer dielectric film stack.
[0011] By adopting the above technical solution, a multilayer dielectric film stack is a structure in which multiple thin film layers with different refractive indices are stacked together in a specific order and thickness. Different dielectric layers produce different interference effects on light of different wavelengths, thereby ensuring the reflection effect of light.
[0012] Optionally, the reflective film is a metal-multilayer dielectric film stack.
[0013] By adopting the above technical solution, the metal-multilayer dielectric film stack is a structure formed by alternately stacking metal films and dielectric films, which is beneficial to enhancing the reflection effect of the reflective film under the action of the metal layer medium.
[0014] Optionally, both the light incident surface and the light emitting surface are provided with a transparent film layer.
[0015] By adopting the above technical solution, under the action of the transparent film layer, it is beneficial to increase the efficiency of the optical system.
[0016] Optionally, the transparent film layer is an anti-reflection film layer.
[0017] By adopting the above technical solution, the anti-reflection film layer is usually composed of one or more layers of dielectric materials with different refractive indices. Its main function is to reduce surface reflection through interference effect. With the addition of the anti-reflection film layer, it is beneficial to enhance the light transmittance of the polyhedron.
[0018] Optionally, the peripheral side surface of the polyhedron is a curvature surface.
[0019] By adopting the above technical solution, the polyhedron is not affected by the shape of the surrounding side surfaces, and the shape of the polyhedron can be manufactured according to the needs, which is beneficial to improving the application range of the polyhedron.
[0020] Optionally, the curvature surface is a cylindrical surface.
[0021] By adopting the above technical solution, the cylindrical curvature surface is conducive to improving the aesthetics of the polyhedron shape.
[0022] Optionally, the curvature surface is an arc-shaped surface.
[0023] By adopting the above technical solution, the arc-shaped curvature surface is conducive to improving the aesthetics of the polyhedron shape.
[0024] In a second aspect, the present application provides a polyhedron color mixing optical manufacturing method, comprising the following steps: Extruding or injection molding a transparent cylinder; Cut into polyhedrons according to actual use requirements; A first covering fixture is provided, and the light incident surface and the light exit surface are covered by the first covering fixture; A reflective film is provided on the peripheral side surfaces of the polyhedron; The first covering fixture is removed, and a second covering fixture is provided to cover the peripheral side surface of the polyhedron; A transparent film layer is respectively provided on the light incident surface and the light emitting surface of the polyhedron; removing the second covering fixture; Fix the polyhedron above the LED.
[0025] By adopting the above technical solution, the efficiency of the optical system is increased by the transparent film layer, and corresponding reflective films are selected for light in different wavelength ranges to ensure the reflection effect of light. Light enters the polyhedral cavity from the light incident surface, and is reflected by the polyhedral reflective film to make the mixed color light fully reflected and fused. After achieving good consistency, it is emitted from the light output surface, which is beneficial to improve the consistency of light color and achieve a good light mixing effect.
[0026] In summary, this application includes the following beneficial technical effects: The light emitted by the LED is squeezed into the cavity of the polyhedron from the light incident surface, and after being fully reflected and integrated in the cavity, it is emitted from the light output surface after achieving good consistency. The light emitted after adjustment by the polyhedron has good color consistency and the various colors of light are fully integrated, which is beneficial to improving the mixing effect of the mixed light. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] Figure 1 It is a schematic diagram of the overall structure of a polyhedron whose curvature surface is a cylindrical surface in the present application; Figure 2 is a cross-sectional view of the polyhedron of the present application; Figure 3 It is a step diagram of the method for manufacturing a polyhedral color mixing optical structure of the present application.
[0028] Explanation of the reference numerals: 1. polyhedron; 2. light incident surface; 3. light emitting surface; 4. reflective film; 5. transparent film layer; 6. curvature surface. DETAILED DESCRIPTION
[0029] The following is combined with Figure 1-3 This application is described in further detail.
[0030] First, see Figure 1 and Figure 2 A polyhedron color mixing optical structure includes a polyhedron 1, which is a transparent body. One end of the polyhedron 1 is a light incident surface 2, and the other end of the polyhedron 1 is a light emitting surface 3.
[0031] When using the polyhedron 1 for light mixing, the light emitted by the LEDs of various colors squeezes into the cavity of the polyhedron 1 from the light incident surface 2, is fully reflected and integrated by the inner cavity of the polyhedron 1, and is emitted from the light emitting surface 3 after reaching good consistency. At this time, the emitted light not only has good color consistency, but also has fully integrated lights of various colors.
[0032] See also Figure 2 In order to improve the reflection effect of the inner cavity of the polyhedron 1 on light, a reflective film 4 is coated on the peripheral side of the polyhedron 1.
[0033] Among them, embodiment one: The reflective film 4 is a multi-layer dielectric film stack, which is coated on the peripheral side of the polyhedron 1 by physical or chemical vapor deposition.
[0034] The multi-layer dielectric film stack refers to a structure formed by stacking multiple dielectric films with different refractive indices according to certain design requirements. The material of the film layer is selected according to the required reflection effect, the thickness of the film layer is designed, and the structure of the film stack is optimized to ensure the emission effect of the mixed color light in the cavity of the polyhedron 1.
[0035] Embodiment 2: The difference from Embodiment 1 is that the structure of the reflective film 4 is different.
[0036] The reflective film 4 is a metal-multilayer dielectric film stack, which is coated on the peripheral side of the polyhedron 1 by physical or chemical vapor deposition.
[0037] The metal-multilayer dielectric film stack is a structure in which a metal layer is added to a multilayer dielectric film. This structure is usually formed by alternating a metal layer and a multilayer dielectric film. The metal layer generally has properties such as high conductivity and high reflectivity, while the dielectric film can regulate optical behaviors such as interference of light through the difference in its refractive index. The metal layer can be gold (Au), silver (Ag) or aluminum (Al). Under the action of the metal layer medium, the reflectivity of the cavity of the polyhedron 1 to light is enhanced, so that the mixed color light is fully mixed.
[0038] See also Figure 2 In order to increase the efficiency of the optical system, the light incident surface 2 and the light emitting surface 3 are both coated with a transparent film layer 5.
[0039] The coating layer is an anti-reflection coating layer 5 , which is coated on the light incident surface 2 and the light emitting surface 3 of the polyhedron 1 by physical or chemical vapor deposition method.
[0040] At atmospheric pressure, the refractive index of air is about N1 = 1, the refractive index of glass is N2 = 1.5, and the refractive index of the anti-reflection film layer 5 is N = 1.25. When light is incident vertically, according to the reflection coefficient formula At this time, R≈0.02. In the art, the smaller the reflection coefficient, the higher the transmittance, thereby reducing reflection and increasing transmission.
[0041] See also Figure 1 The peripheral side surface of the polyhedron 1 is a curvature surface 6, and the curvature surface 6 has an arbitrary curvature. And the arbitrary curvature surface 6 can be a cylindrical surface, an arc surface, a circular surface, etc.
[0042] The polyhedron 1 is not affected by the shape of the surrounding side surfaces, and the shape of the polyhedron 1 can be manufactured according to the needs, thereby improving the application range of the polyhedron 1.
[0043] Working principle of a polyhedron 1 color mixing optical structure: Each color LED emits light separately, and the mixed color light enters the cavity of the polyhedron 1 from the light incident surface 2, and is reflected by the reflective film 4 of the polyhedron 1, so that the mixed color light is fully reflected and merged, and then emitted from the light emitting surface 3 after achieving good consistency.
[0044] Second, see Figure 3 , a polyhedron color mixing optical production method, comprising the following steps: S1: A transparent cylinder is extruded by an extrusion device; S2: Cutting the transparent cylinder into a polyhedron 1 according to the actual required shape; S3: Install a first covering fixture, and use the first covering fixture to cover the light incident surface 2 and the light exit surface 3; S4: coating the peripheral side surface of the polyhedron 1 with a reflective film 4 by a physical or chemical vapor deposition method, wherein the reflective film 4 may be a multi-layer dielectric film stack or a metal-multi-layer dielectric film stack; S5: removing the first covering fixture, and installing a second covering fixture to cover the peripheral side surface of the polyhedron 1; S6: coating the light incident surface 2 and the light emitting surface 3 of the polyhedron 1 with a transparent film layer 5 by a physical or chemical vapor deposition method, wherein the transparent film layer 5 is an anti-reflection film layer 5; S7: removing the second covering fixture; S8: Fix the polyhedron 1 above the LED for use.
[0045] In summary, the reflective film 4 improves the reflection effect of the inner cavity of the polyhedron 1 on light, and the transparent film layer 5 increases the efficiency of the optical system. The present application effectively improves the color mixing effect and efficiency of dimming and color-adjusting lamps with various light distribution shapes, and the various monochromatic lights adjusted by the polyhedron 1 are fully integrated, which completely solves the problems of light spots, color blocks, rainbow stripes, etc. of various multi-color LED light sources. At the same time, thanks to this invention, in the era of intelligence, various dimming and color-adjusting lamps will surely meet people's pursuit of the ultimate lighting effect.
[0046] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.
Claims
1. A polyhedral color mixing optical structure, characterized in that: It comprises a polyhedron (1), the interior of the polyhedron (1) is transparent, one end of the polyhedron (1) is provided with a light incident surface (2), and the other end of the polyhedron (1) is provided with a light emitting surface (3).
2. The polyhedral color mixing optical structure according to claim 1, characterized in that: A reflective film (4) is provided on the peripheral side surface of the polyhedron (1).
3. The polyhedral color mixing optical structure according to claim 2, characterized in that: The reflective film (4) is a multi-layer dielectric film stack.
4. The polyhedral color mixing optical structure according to claim 2, characterized in that: The reflective film (4) is a metal-multilayer dielectric film stack.
5. The polyhedral color mixing optical structure according to claim 1, characterized in that: The light incident surface (2) and the light emitting surface (3) are both provided with a transparent film layer (5).
6. The polyhedral color mixing optical structure according to claim 5, characterized in that: The transparent film layer (5) is a plated anti-reflection film layer (5).
7. The polyhedral color mixing optical structure according to claim 1, characterized in that: The peripheral side surface of the polyhedron (1) is a curvature surface (6).
8. The polyhedral color mixing optical structure according to claim 7, characterized in that: The curvature surface (6) is a cylindrical surface.
9. The polyhedral color mixing optical structure according to claim 7, characterized in that: The curvature surface (6) is an arc-shaped surface.
10. A method for manufacturing a polyhedron color mixing optical structure, based on a polyhedron color mixing optical structure according to any one of claims 1 to 9, comprising the following steps: Extruding or injection molding a transparent cylinder; Cutting into a polyhedron (1) according to actual use requirements; A first covering fixture is provided, and the light incident surface (2) and the light exit surface (3) are covered by the first covering fixture; A reflective film (4) is provided on the peripheral side surface of the polyhedron (1); The first covering fixture is removed, and a second covering fixture is provided to cover the peripheral side surface of the polyhedron (1); A transparent film layer (5) is respectively provided on the light incident surface (2) and the light emitting surface (3) of the polyhedron (1); removing the second covering fixture; The polyhedron (1) is fixed above the LED.