CN104075250A - Light distribution structure and LED lamp thereof - Google Patents

Abstract

A light distribution structure comprises a reflector assembly and a lens assembly arranged at one end of the reflector assembly, wherein the lens assembly comprises a first side surface, a second side surface and a plurality of lenses positioned on the first side surface and the second side surface, the reflector assembly is designed by adopting injection molding and mold opening integrated forming, and reflects incident light rays into collimated parallel light rays, and the collimated parallel light rays are transmitted to the lenses on the first side surface and are subjected to light distribution treatment through the lenses on the second side surface. The invention also provides an LED lamp applying the light distribution structure. The light distribution structure improves the illuminance uniformity of the illuminated surface, forms light spots with uniform colors, and meets the light distribution requirement of the LED lamp.

Description

Light distribution structure and its LED lamps

technical field

The invention relates to the field of lighting, in particular to a light distribution structure and an LED (light emitting diode, light-emitting diode) lamp using the light distribution structure.

Background technique

As a semiconductor device that can convert electrical energy into light energy, LED is widely used in various lighting fixtures due to its advantages of high efficiency, low energy consumption, and long life, such as search lights and surgical lights. , Indispensable lighting appliances for work. However, since LED itself is a Lambertian light source, its luminous intensity is mostly lower on both sides and higher at the center, so LED generally cannot be directly applied to the lighting field. Therefore, it is particularly important to perform optical light distribution on LED light sources. At present, most of the light distribution structures for LED light sources on the market have the following disadvantages: 1. The illumination uniformity of the illuminated surface is low; 2. The boundary of the lighting spot is not clear, and the energy is scattered; 3. The emitted light is easy to produce Dispersion, uneven color.

Contents of the invention

In view of the above problems, the purpose of the present invention is to provide a light distribution structure, which can improve the uniformity of illumination of the illuminated surface, and can form illumination spots with clear boundaries and uniform colors.

The present invention also provides an LED lamp applying the above light distribution structure.

In order to solve the above technical problems, the present invention provides a light distribution structure, the light distribution structure includes a reflector assembly and a lens assembly installed at one end of the reflector assembly, the lens assembly includes a first side, a second side and a plurality of lenses located on the first side and the second side, the reflector assembly adopts an injection molded integral molding design, and reflects the incident light into collimated parallel rays, and the parallel collimated rays The light is transmitted to a plurality of lenses on the first side, and passes through a plurality of lenses on the second side to perform light distribution processing on the light.

Wherein, the reflector assembly is a collimating reflector, which is made of polycarbonate plastic or ABS plastic, and the reflective surface of the reflector assembly is processed by aluminum plating to reflect the incident light.

Wherein, the reflector assembly includes a first open end and a second open end, the aperture of the first open end is smaller than the aperture of the second open end, and the lens assembly is located at the second open end for reflecting and refract the light reflected by the reflector assembly and the light directly incident on it.

Wherein, the diameter of the first opening end is 8 mm, the diameter of the second opening end is 28.3 mm, the height of the reflector assembly is 23 mm, and the inner surface of the reflector assembly 40 is a paraboloid as a whole.

Wherein, the lens assembly is in the shape of a cylinder as a whole, which is made of optical-grade plastic or glass through integral molding design.

Wherein, the lens assembly is in the shape of a cylinder as a whole, which is made of PMMA plastic, PC plastic or glass through integral molding design.

Wherein, the lens assembly is any one of a regular hexagonal fly-eye coupling lens or a double-sided fly-eye lens.

Wherein, the lens is a regular hexagonal spherical convex structure, and is arranged on the first side and the second side according to a regular hexagon, forming a regular hexagonal illumination spot with uniform illumination by the incident light.

Wherein, the height of the lens assembly is 10 millimeters, the diameter of its circular cross section is 30 millimeters, and the side length of the regular hexagonal lenses arranged on the first side and the second side according to the regular hexagon is 1.732 mm, and the spherical radius of each lens is 5 mm.

The present invention also provides an LED lamp, which includes a light source. The LED lamp also includes the above light distribution structure. The light source is installed at the other end of the reflector assembly relative to the lens assembly. The light emitted by the light source illuminates to the mirror assembly and lens assembly.

In the LED lamp provided by the implementation of the present invention, the reflector assembly and the lens assembly constitute the secondary light distribution structure of the LED lamp, the reflector assembly reflects the light emitted by the light source, and forms parallel light rays to exit the lens The light emitted by the lens assembly overlaps and illuminates the illuminated surface, improves the illuminance uniformity of the illuminated surface, and forms a light spot with uniform color, which meets the light distribution requirements of the LED lamp.

Description of drawings

In order to illustrate the technical solution of the present invention more clearly, the accompanying drawings used in the implementation will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some implementations of the present invention. As far as the skilled person is concerned, other drawings can also be obtained based on these drawings on the premise of not paying creative work.

Fig. 1 is a schematic structural diagram of an LED lamp provided by an embodiment of the present invention.

FIG. 2 is a schematic perspective view of the reflector assembly shown in FIG. 1 .

FIG. 3 is a schematic plan view of the reflector assembly shown in FIG. 2 .

FIG. 4 is a schematic perspective view of the lens assembly shown in FIG. 1 .

FIG. 5 is a schematic front plan view of the lens assembly shown in FIG. 4 .

FIG. 6 is a schematic top plan view of the lens assembly shown in FIG. 4 .

Fig. 7 is a schematic diagram of the optical path of light reflected by the reflector assembly and the lens assembly.

Fig. 8 is the illuminance diagram of the LED lamp provided by the implementation of the present invention at 2 meters.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

Please refer to FIG. 1 , an embodiment of the present invention provides an LED lamp 100 , which can be a search lamp, an operation lamp and other lighting lamps. In the embodiment of the present invention, the LED lamp 100 includes a light source 20, a reflector assembly 40, and a lens assembly 50. The reflector assembly 40 and the lens assembly 50 constitute the light distribution structure of the LED lamp 100, which can Create a uniform spot. The light source 20 can emit light of corresponding color and brightness according to lighting needs, the reflector assembly 40 reflects the light emitted by the light source 20, and the lens assembly 50 optically processes (such as reflection and refraction) light from the reflector assembly 40 ray, so that the light is shaped and evenly dispersed to form a uniform spot.

In the embodiment of the present invention, the LED lamp 100 also includes a lamp housing, a heat sink, a drive assembly, a rectifier circuit, a lampshade and other components, and the lamp housing is the main body of the LED structure 100, which is used to accommodate the The light source 20, the reflector assembly 40, the lens assembly 50, the cooling plate, the drive assembly, the rectifier circuit and other components are inside, and the lampshade is detachably covered on the lamp housing, and then the light source 20, the reflector Components 40, lens components 50, cooling plates, drive components, rectifier circuits and other components are packaged in the lamp housing.

In the embodiment of the present invention, the light source 20 is an LED chip, which can be mounted on the heat dissipation plate (such as an aluminum substrate) by surface mounting, welding, etc., and the heat dissipation plate can generate The heat is dissipated by conduction. The light emitting part of the light source 20 is located in the reflector assembly 40 , and the light emitted by it is reflected by the reflector assembly 40 and enters one side of the lens assembly 50 .

Please also refer to Fig. 2 and Fig. 3, the reflector assembly 40 can be a collimating reflector, which can be made of ABS (alkyl benzo sulfonate, acrylonitrile-butadiene-styrene) plastic or PC (polycarbonate, polycarbonate ) made of plastic and other materials. The reflector assembly 40 can adopt an injection molded integral molding design, and its inner surface 41 as a reflective surface can be processed by aluminum plating to reflect the light emitted by the light source 20, and make the reflected light (that is, exit to the lens assembly) 50) into collimated parallel rays. In the embodiment of the present invention, the reflector assembly 40 includes a first open end 42 and a second open end 44 , the diameter of the first open end 42 is smaller than the diameter of the second open end 44 . The light source 20 is located at the first open end 42 of the reflector assembly 40, and the lens assembly 50 is located at the second open end 44 for reflecting and refracting the light reflected by the reflector assembly 40 and the The light directly incident on the light source 20.

As an embodiment of the present invention, one set of design parameters of the reflector assembly 40 can be: the diameter of the first open end is about 8 millimeters, the diameter of the second open end 44 (that is, the diameter of the reflector assembly 40 light exit diameter) is about 28.3 mm, the height of the reflector assembly 40 is about 23 mm, the inner surface 41 of the reflector assembly 40 is generally a paraboloid, and its generatrix equation is y2=8x, so that the reflected light become collimated light. It can be understood that the above-mentioned design parameters are only one specific embodiment of the LED structure 100, and the present application is not limited to the above-mentioned design parameters. The performance design parameters are all within the protection scope of the present application, and will not be repeated here.

Please refer to Figures 4 to 7 together, the lens assembly 50 is roughly in the shape of a cylinder, which can be made of optical-grade plastics such as PMMA (polymethylmethacrylate) plastics, PC plastics, or glass through integral molding design. become. In the embodiment of the present invention, the lens assembly 50 is installed at the second open end 44 of the reflector assembly 40 for reflecting and refracting the light reflected by the reflector assembly 40 and the light directly incident on the light source 20 of light. The lens assembly 50 can be a regular hexagonal fly-eye coupling lens or a double-sided fly-eye lens, which includes a first side 52, a second side 53 corresponding to the first side 52, and a second side 53 arranged between the first side 52 and the second side. The lenses 54 on the two sides 53 are regular hexagonal spherical convex structures, and are arranged on the first side 52 and the second side 53 according to a regular hexagon. The plurality of lenses 54 optically process (eg reflect, refract) the light from the reflector assembly 40 to shape and uniformly disperse the light so as to form a uniform light spot.

Specifically, the light emitted by the light source 20 is irradiated to the reflector assembly 40, and the inner surface 41 of the reflector assembly 40 reflects the light (the light ① and the light ② shown in FIG. 7), so that the reflected The light is parallel to the optical axis and exits onto the first side 52 of the lens assembly 50, the light is refracted at the first side 52 and focused on the focal point of the second side 53 (that is, on the second side 53 At the center point of each spherical lens 54 ), the light rays of different spatial frequencies of the light source 20 can be imaged at different positions, so that the number of total imaging points is equal to the number of the spherical lenses 54 . In this way, the light rays emitted by each spherical lens 54 pass through the second side 53 (the light ① and the light ② shown in FIG. 7 ) while keeping the transmission route unchanged, and overlap and illuminate the illuminated surface. This light transmission process is equivalent to It is used to transform the illumination of a single light source 20 into mixed illumination of multiple LED light sources, thereby forming a regular hexagonal illumination spot with uniform illumination within a certain range, and improving color uniformity. Please also refer to Fig. 8. Fig. 8 is an illuminance diagram of the LED lamp 100 provided by the implementation of the present invention at 2 meters, which represents the luminous flux received by the object per unit time on the illuminated surface. As can be seen from Fig. 8, the light spot formed on the illuminated surface is A regular hexagon with an illumination uniformity of about 90%. The secondary light distribution structure composed of the reflector assembly 40 and the lens assembly 50 meets the light distribution requirements of the LED lamp 100 .

As an embodiment of the present invention, one of the design parameters of the lens assembly 50 can be: the height of the cylindrical lens assembly 50 is about 10 millimeters, and the diameter of its circular cross section is about 30 millimeters, according to the regular hexagonal The side length of the regular hexagonal spherical lenses 54 arranged on the first side 52 and the second side 53 is about 1.732 millimeters, and the spherical radius of each spherical lens 54 is about 5 millimeters. Based on the above design, the lens assembly 50 can transform the illumination of a single light source 20 into mixed illumination of multiple LED light sources, thereby forming regular hexagonal light spots with uniform illumination within a certain range, and improving color uniformity. It can be understood that the above-mentioned design parameters are only one specific embodiment of the lens assembly 50, and the present application is not limited to the above-mentioned design parameters. The size of the lens assembly 50 is designed according to the structural size, as long as the optical performance is satisfied The design parameters are all within the protection scope of the present application, and will not be repeated here.

Please refer to Fig. 1 to Fig. 6 together. When in use, the light source 20 is installed and fixed on the heat dissipation plate (for example, aluminum substrate), and passes through the first open end 42 of the reflector assembly 40. , the light source 20 emits light of corresponding color and brightness according to lighting requirements. The light emitted by the light source 20 is irradiated onto the inner surface 41 of the reflector assembly 40, and the inner surface 41 reflects the light (the light ① and the light ② shown in FIG. 7), so that the reflected light is parallel to the light The axial direction is irradiated on the first side 52 of the lens assembly 50, and the light is refracted at the first side 52 and focused on the focal point of the second side 53 (that is, each spherical lens on the second side 53 54 at the center point). At this time, the light rays of different spatial frequencies of the light source 20 are respectively imaged at different positions, so that the number of total imaging points is equal to the number of the lenses 54 . The light rays emitted by each spherical lens 54 pass through the second side surface 53 (the light ① and the light ② shown in FIG. 7 ) while keeping the transmission line unchanged, and overlap and illuminate the illuminated surface. In this way, the entire light transmission process of the light emitted by the light source 20 is equivalent to transforming the illumination of a single light source 20 into mixed illumination of multiple LED light sources, thereby forming regular hexagonal illumination spots with clear boundaries and uniform colors within a certain range, and improving The illumination uniformity of the illuminated surface is ensured.

In summary, in the LED lamp 100 provided by the implementation of the present invention, the reflector assembly 40 and the lens assembly 50 constitute the secondary light distribution structure of the LED lamp 100, and the reflector assembly 40 reflects the light emitted by the light source 20 light, and form parallel light rays to exit to the lens assembly 50, the light emitted by the lens assembly 50 overlaps and illuminates the illuminated surface, improves the uniformity of illumination of the illuminated surface, and forms a uniform color spot, which satisfies the requirements of the LED The light distribution requirements of the lamp 100.

The above description is a preferred embodiment of the present invention, and it should be pointed out that for those skilled in the art, without departing from the principle of the present invention, some improvements and modifications can also be made, and these improvements and modifications are also considered Be the protection scope of the present invention.

Claims (10)

1. A light distribution structure, characterized in that the light distribution structure includes a reflector assembly and a lens assembly mounted on one end of the reflector assembly, the lens assembly includes a first side, a second side and a For the lenses on the first side and the second side, the reflector assembly adopts an integral design of injection mold opening, and reflects the incident light into collimated parallel light, and the parallel collimated light is transmitted to the On the several lenses on the first side, and pass through the several lenses on the second side to perform light distribution processing on the light. 2. The light distribution system according to claim 1, wherein the reflector assembly is a collimating reflector made of polycarbonate plastic or ABS plastic, and the reflective surface of the reflector assembly is coated with aluminum Handled to reflect incoming rays. 3. The light distribution system according to claim 1, wherein the reflector assembly comprises a first open end and a second open end, the diameter of the first open end is smaller than the diameter of the second open end, the The lens assembly is located at the second opening end, and is used for reflecting and refracting the light reflected by the reflector assembly and the directly incident light. 4. The light distribution system according to claim 3, wherein the diameter of the first opening end is 8 millimeters, the diameter of the second opening end is 28.3 millimeters, the height of the reflector assembly is 23 millimeters, and the reflection The inner surface of the device assembly 40 is a paraboloid as a whole. 5. The light distribution system according to claim 1, wherein the lens assembly is in the shape of a cylinder as a whole, which is made of optical grade plastic or glass through integral molding design. 6. The light distribution system according to claim 1, wherein the lens assembly is in the shape of a cylinder as a whole, which is made of PMMA plastic, PC plastic or glass through integral molding design. 7. The light distribution system according to claim 1, wherein the lens assembly is any one of a regular hexagonal fly-eye coupling lens or a double-sided fly-eye lens. 8. The light distribution system according to claim 1, wherein the lens is a regular hexagonal spherical convex structure, and is arranged on the first side and the second side according to a regular hexagon, so that the lens The incoming light forms a regular hexagonal lighting spot with uniform illumination. 9. The light distribution system according to claim 1, wherein the lens assembly has a height of 10 millimeters and a diameter of a circular cross section of 30 millimeters, and is arranged on the first side and the first side according to a regular hexagon. The side length of the regular hexagonal lenses on the second side is 1.732 millimeters, and the spherical radius of each lens is 5 millimeters. 10. An LED lamp, comprising a light source, characterized in that the LED lamp further comprises the light distribution structure according to any one of claims 1 to 9, the light source is installed on the reflector assembly relative to the lens assembly At the other end, the light emitted by the light source is irradiated to the reflector assembly and the lens assembly.