Double-layer reflector structure

Abstract

The utility model relates to the technical field of illumination, in particular to a double-layer reflector structure which comprises a shell, a first layer of reflection assembly and a second layer of reflection assembly, and the first layer of reflection assembly and the second layer of reflection assembly are sequentially arranged on the shell. The first-layer reflection assembly comprises three reflection cups, a first reflection surface is arranged on the inner wall of each reflection cup, the three reflection cups are distributed in a triangular shape, a light inlet is formed in one end of each reflection cup, a light outlet is formed in the other end of each reflection cup, and a single-color RGB light source is arranged at the light inlet of each reflection cup; the second layer reflection assembly comprises a reflection ring table, and the inner wall of the reflection ring table is provided with a second reflection face. According to the utility model, the structure is novel, the first reflection surface of the reflection cup carries out light distribution and monochromatic light mixing so as to obtain small-angle and monochromatic better light spot uniformity, and the second reflection surface carries out cross light supplement on large-angle light rays directly emitted by the monochromatic RGB light source again so as to eliminate light spot edge color separation and further improve the overall light spot uniformity; and the overall lighting effect of the LED lamp is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of lighting, in particular to a double-layer reflector structure. Background Art

[0002] Since lamps using RGB light sources can mix different colors of light to create an atmosphere, and can also mix white light of different color temperatures for lighting, they are becoming more and more popular in the market.

[0003] Since RGB is a three-color light source, a light mixing structure is required. Currently, there are three main light mixing methods used in lighting fixtures. The first is light mixing and light distribution through a TIR lens. This method combines light mixing and light distribution in one, and is highly efficient. However, it primarily relies on a beaded or frosted surface for light mixing, resulting in a generally wide light distribution angle. At small angles, the outer light spot can be stratified, and at more severe angles, the central light spot cannot be evenly mixed. The second method uses a reflector cup plus a diffuser film or plate for light mixing. This method is also highly efficient, but it also faces the same problem as TIR mixing: color stratification at small angles. The third method is a light mixing cavity plus a light distribution lens. The light source first mixes the RGB light through the mixing cavity, and then distributes the light through the light distribution lens to narrow the light output angle. However, this solution has low light efficiency, and the light loses a lot of energy when passing through the mixing cavity. In summary, current RGB light fixtures face a dilemma in achieving high light efficiency, a small angle, and uniform light mixing. Summary of the Invention

[0004] In response to the problems of the prior art, the utility model provides a double-layer reflector structure with a novel structure and ingenious design. The first reflective surface of the reflective cup performs light distribution and monochromatic light mixing to obtain small-angle and monochromatic light spot uniformity. The second reflective surface cross-fills the large-angle light directly emitted by the monochromatic RGB light source again to eliminate the color separation of the light spot edge and further improve the overall light spot uniformity, which is beneficial to improving the overall lighting effect of the utility model.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] The utility model provides a double-layer reflector structure, which includes a shell and a first-layer reflective component and a second-layer reflective component arranged in sequence on the shell; the first-layer reflective component includes three reflective cups, the inner walls of the reflective cups are provided with a first reflective surface, the reflective cups are semi-ellipsoidal, and the three reflective cups are distributed in a triangular shape, one end of the reflective cups is provided with a light inlet, and the other end of the reflective cups is provided with a light outlet, a monochromatic RGB light source is installed at the light inlet of each reflective cup, and the first reflective surface is used to distribute and mix the light emitted by the monochromatic RGB light source; the second-layer reflective component includes a reflective ring platform, the inner wall of the reflective ring platform is provided with a second reflective surface, the light emitted by the light source is incident from the light inlet to the first reflective surface, and then emitted from the light outlet to the second reflective surface for outward reflection, and the second reflective surface performs cross-filling on the large-angle light directly emitted by the monochromatic RGB light source.

[0007] The first reflecting surface is defined by the following ellipsoid equation:

[0008] ;

[0009] in, , .

[0010] The second reflecting surface is formed by rotating the reference busbar around the center of the shell.

[0011] The reference busbar includes a QT segment optical surface and a PQ segment structural surface, and the QT segment optical surface is connected to the first layer of reflective components through the PQ segment structural surface.

[0012] The QT segment uses point T as the starting point for optical surface calculation. , where D1 is the optical aperture of the shell, D is the optical aperture of the reflector cup, and d is the wall thickness of the reflector cup, which is used to determine the position of point T;

[0013] Connect the center point of the light entrance and the T point to determine the angle , connect the center point of the light entrance and the O point of the light exit of the reflector cup to determine the angle , angle Angle The angle between , divide the angle into n parts, The unit vector of the incident ray is ,in is an integer, ;

[0014] The L1 area is also divided into n parts, then The unit vector of the outgoing ray is , then according to the vector formula of the law of reflection: The first Normal vector of a ray , record the first The coordinates of the points are , then points and There is the following recursive relationship:

[0015]

[0016]

[0017] in is an integer, .

[0018] Beneficial effects of the utility model:

[0019] The utility model has a novel structure and ingenious design. The light emitted by the monochromatic RGB light source first passes through the first reflective surface of the reflective cup for light distribution and monochromatic mixing to obtain a small-angle and monochromatic light spot with good uniformity. Thereafter, the light is emitted from the light outlet and passes through the second reflective surface. The second reflective surface cross-fills the large-angle light directly emitted by the monochromatic RGB light source again to eliminate color separation at the edge of the light spot and further improve the overall light spot uniformity. Under the above setting, the overall lighting effect of the utility model is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a structural schematic diagram of a double-layer reflector structure of the present utility model.

[0021] Figure 2 This is a schematic structural diagram of a double-layer reflector structure of the present invention from another perspective.

[0022] Figure 3 This is a schematic diagram of light when a double-layer reflector structure of the utility model is working.

[0023] Figure 4 Schematic diagram of the positional relationship among L1, D1, D, d and L2 of the present invention.

[0024] exist Figures 1 to 4 Reference numerals in the figures include:

[0025] 100. Housing; 1. First reflecting surface; 2. Light inlet; 3. Light outlet; 4. Monochromatic RGB light source; 5. Reflection ring; 6. Second reflecting surface; 7. Reflection cup. DETAILED DESCRIPTION

[0026] In order to facilitate the understanding of those skilled in the art, the present invention is further described below in conjunction with the embodiments and drawings. The contents mentioned in the embodiments are not intended to limit the present invention. The present invention is described in detail below in conjunction with the drawings.

[0027] In the embodiment of this application, Figures 1 to 3 A double-layer reflector structure is shown, which includes a shell 100 and a first-layer reflective component and a second-layer reflective component arranged in sequence on the shell 100; the first-layer reflective component includes three reflective cups 7, the inner wall of the reflective cup 7 is provided with a first reflective surface 1, the reflective cup 7 is semi-ellipsoidal, and the three reflective cups 7 are distributed in a triangular shape. Preferably, the three reflective cups 7 are distributed in an equilateral triangle shape, one end of the reflective cup 7 is provided with a light inlet 2, and the other end of the reflective cup 7 is provided with a light outlet 3. A monochromatic RGB light source 4 is installed at the light inlet 2 of each reflective cup 7, and the first reflective surface 1 is used to distribute and mix the light emitted by the monochromatic RGB light source 4; the second-layer reflective component includes a reflective ring platform 5, the inner wall of the reflective ring platform 5 is provided with a second reflective surface 6, the light emitted by the light source is incident from the light inlet 2 to the first reflective surface 1, and is emitted from the light outlet 3 to the second reflective surface 6 for outward reflection, and the second reflective surface 6 cross-fills the large-angle light directly emitted by the monochromatic RGB light source 4. Specifically, the embodiment of the present application has a novel structure and ingenious design. The light source of the embodiment of the present application is composed of three separate R, G, and B light sources. The three reflective cups 7 are distributed in the shape of an equilateral triangle, and the three monochromatic RGB light sources 4 are distributed in the shape of an equilateral triangle. The centers of the three monochromatic RGB light sources 4 coincide with the vertices of the equilateral triangles. The light emitted by the monochromatic RGB light source 4 first passes through the first reflective surface 1 of the reflective cup 7 for light distribution and monochromatic mixing to obtain a small-angle and monochromatic light spot with good uniformity. Then, it is emitted from the light outlet 3 through the second reflective surface 6. The second reflective surface 6 cross-fills the large-angle light directly emitted by the monochromatic RGB light source 4 again to eliminate the color separation of the light spot edge and further improve the overall light spot uniformity. Under the above setting, it is beneficial to improve the overall lighting effect of the present invention.

[0028] In this embodiment, the centers of the three monochromatic RGB light sources coincide with the vertices of an equilateral triangle. The side length L1 of the equilateral triangle is determined by the diameter D of the reflector cup (i.e., the diameter of the light outlet). The first reflective assembly is formed by an array of three identical single reflector cups 7. Since the length of the region where the principal rays from different light sources exit through the reflector cups and do not overlap is also L1, to ensure that the principal rays overlap as much as possible, L1 should be as small as possible. Furthermore, because L1 = D + d, where d is the thickness of the cup, the diameter of the reflector cup mouth should be as small as possible while ensuring the light output angle and light spot. Finally, the first reflective surface is defined by the following ellipsoid equation:

[0029] ;

[0030] in, , ; is a point on the ellipsoid, c represents the curvature of the surface, ,k represents the surface shape.

[0031] The second reflective component: The surface of the second reflective component is a free-form surface. Its main function is to deflect the large-angle light directly emitted by the light source to the position where the main light emitted by the light sources of different colors through the reflective cup is not superimposed: Due to the distance between the light sources in space, the edge color of the light source at a certain distance will be deviated after the light passes through the reflective cup, that is, the edge color of the light spot is more inclined to the light source arranged on the side close to it; and this part of the energy is composed of two parts, one is the energy emitted by the reflective cup, and the other is the energy directly emitted from the light source; due to the small-angle light distribution, the height of the reflective cup is generally limited by the structure, so the large-angle light is the main light of the direct light from the light source; in order to eliminate the color cast phenomenon, it is possible to consider making a layer of reflective cup on the outside to cross-fill the direct light from the light source, such as Figure 3 As shown, the large-angle direct light from R is reflected through the second layer of reflective cups to the area where the main light emitted by the G light source through the reflective cups is not superimposed, while the large-angle direct light from G is reflected through the second layer of reflective cups to the area where the main light emitted by the R light source through the reflective cups is not superimposed.

[0032] In the embodiment of the present application, the second reflective surface is formed by rotating the reference busbar around the center of the shell, and the second reflective surface includes a QT segment optical surface and a PQ segment structural surface, and the QT segment optical surface is connected to the first layer of reflective components through the PQ segment structural surface. Wherein, the reference busbar includes a QT segment and a PQ segment; wherein, the QT segment optical surface is a free-form surface, and its main function is to deflect the large-angle light directly emitted by the monochromatic RGB light source to the position where the main light emitted by the light source of different colors through the reflective cup is not superimposed: due to the distance between the light sources in space, the edge color of the light source at a certain distance will be deviated after the light is distributed by the reflective cup, that is, the edge color of the light spot is more biased towards the light source arranged close to it. Wherein, the positional relationship between L2 and D1, d, and D is as follows Figure 4 As shown, the QT segment takes point T as the starting point for optical surface calculation. , where D1 is the optical aperture of the housing, D is the optical aperture of the reflector cup, d is the wall thickness of the reflector cup, and h is determined by the required height of the structure (housing) of the lamp, thereby determining the position of point T;

[0033] Connect the center point of the light entrance and the T point to determine the angle , connect the center point of the light entrance and the O point of the light exit of the reflector cup to determine the angle , angle Angle The angle between , divide the angle into n parts, The unit vector of the incident ray is ,in is an integer, ;

[0034] The L1 area is divided into n parts in turn, and L1 is defined as the distance between the two RGB light sources, such as Figure 4 As shown, L1=D+d; it is numerically equal to the length of the area where the edge main light rays of two light sources of different colors do not overlap after passing through the first layer of reflective cups; then the The unit vector of the outgoing ray is , then according to the vector formula of the law of reflection: The first Normal vector of a ray , record the first The coordinates of the points are , then points and There is the following recursive relationship:

[0035] ;

[0036] ;

[0037] in is an integer, .

[0038] Specifically, under the above settings, all points on the curved surface of the second reflective surface can be deduced, and finally these points can be fitted to obtain the curve of the QT segment; since the PQ segment is a structural surface, it is only necessary to connect the PQ segments with arcs or straight lines to obtain the entire curve PT, and then rotate the PT segment along the center line of the shell to obtain the surface shape of the second reflective surface.

[0039] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention is disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technician familiar with the profession can make some changes or modifications to equivalent embodiments of the above-disclosed technical contents without departing from the scope of the technical solution of the present invention. However, any simple modifications, equivalent changes and modifications made to the above embodiments according to the technology of the present invention, which do not depart from the content of the technical solution of the present invention, are within the scope of the technical solution of the present invention.

Claims

1. A double-layer reflector structure, characterized in that: The invention comprises a shell and a first layer of reflective components and a second layer of reflective components sequentially arranged on the shell; the first layer of reflective components comprises three reflective cups, the inner wall of each reflective cup is provided with a first reflective surface, the reflective cup is semi-ellipsoidal, and the three reflective cups are distributed in a triangular shape, one end of each reflective cup is provided with a light inlet, and the other end of the reflective cup is provided with a light outlet, a monochromatic RGB light source is installed at the light inlet of each reflective cup, and the first reflective surface is used to distribute and mix the light emitted by the monochromatic RGB light source; the second layer of reflective components comprises a reflective ring platform, the inner wall of the reflective ring platform is provided with a second reflective surface, the light emitted by the light source is incident from the light inlet to the first reflective surface and is emitted from the light outlet to the second reflective surface for outward reflection, and the second reflective surface performs cross-filling on the large-angle light directly emitted by the monochromatic RGB light source.

2. A double-layer reflector structure according to claim 1, characterized in that: The first reflecting surface is defined by the following ellipsoid equation: ； Where c represents the curvature of the surface, ,k represents the surface shape, , .

3. The double-layer reflector structure according to claim 1, characterized in that: The second reflecting surface is formed by rotating the reference generatrix around the center of the shell.

4. The double-layer reflector structure according to claim 3, characterized in that: The second reflective surface includes a QT segment optical surface and a PQ segment structural surface, and the QT segment optical surface is connected to the first layer of reflective components through the PQ segment structural surface.

5. The double-layer reflector structure according to claim 4, characterized in that: The reference generatrix includes a QT segment and a PQ segment, wherein the QT segment uses point T as the starting point for optical surface calculation. , where D1 is the optical aperture of the shell, D is the optical aperture of the reflector cup, and d is the wall thickness of the reflector cup, which is used to determine the position of point T; Connect the center point of the light entrance and the T point to determine the angle , connect the center point of the light entrance and the O point of the light exit of the reflector cup to determine the angle , angle Angle The angle between , divide the angle into n parts, The unit vector of the incident ray is ,in is an integer, ; The L1 area is also divided into n parts, then The unit vector of the outgoing ray is , then according to the vector formula of the law of reflection: The first Normal vector of a ray , record the first The coordinates of the points are , then points and There is the following recursive relationship: in is an integer, .

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