CN211667600U

CN211667600U - LED lighting device

Info

Publication number: CN211667600U
Application number: CN202020132976.5U
Authority: CN
Inventors: 史韵煊; 代维友
Original assignee: Signify Holding BV
Current assignee: Signify Holding BV
Priority date: 2020-01-20
Filing date: 2020-01-20
Publication date: 2020-10-13
Anticipated expiration: 2030-01-20

Abstract

The utility model belongs to the LED illumination field especially relates to a LED lighting device, including light source and lens, the light source includes: the LED lighting device comprises a first LED lighting module and a second LED lighting module; the lens includes: a first lens portion formed of a single optical structure corresponding to the first LED light emitting module, the first lens portion adjusting the first light from the first LED light emitting module and projecting the first light to a first illumination area on the illumination plane; the second lens part corresponds to the second LED light-emitting module and is formed by a plurality of optical structures, one optical structure adjusts second light emitted by a corresponding LED light source, and the second lens part projects the second light to a second illumination area on the illumination plane; the extent of the first illumination area is substantially equal to the extent of the second illumination area. By applying the technical scheme, the problem of uneven color distribution caused by the fact that the color light and the light spots projected by the white light are not coincident during color full-spectrum illumination in the prior art is solved.

Description

LED lighting device

Technical Field

The utility model belongs to the technical field of the LED illumination, especially, relate to a LED lighting device.

Background

In a traditional LED lighting fixture, the light emission spectrum is a fixed spectrum, which is generally warm yellow light, warm white light, and cool white light, and the corresponding color temperatures are 2700k, 4000k, 6500k, etc., respectively, and the proportion of light rays with various wavelengths in the light rays emitted by these LED lighting fixtures is fixed, and the appearance of the LED lighting fixture is also fixed for users. At present, a point light source without full-spectrum control usually adopts a form of combining a color LED and a white LED, when color full-spectrum illumination is carried out, the pattern difference between the color LED and the white LED cannot be solved, namely, the superposition of light spots formed by projecting color light and white light cannot be realized, so that the color distribution is uneven, and when the color distribution is seriously uneven, only colored light appears in the middle of a projected light spot area.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a LED lighting device, the facula after colored light sum white light throws does not coincide when aiming at solving among the prior art colored full gloss register for easy reference illumination, leads to the inhomogeneous problem of color distribution.

In order to achieve the above object, the utility model adopts the following technical scheme: an LED lighting device comprising a light source and a lens, the light source comprising: the LED module comprises a first LED light-emitting module and a second LED light-emitting module arranged around the first LED light-emitting module; the first LED light-emitting module comprises a light source array formed by a plurality of adjacent LED chips, and the second LED light-emitting module comprises a plurality of LED light sources which are distributed discretely; the lens includes: a first lens portion formed of a single optical structure corresponding to the first LED lighting module, the first lens portion modulating the first light from the first LED lighting module, the first lens portion projecting the first light to a first illumination area on the illumination plane; the second lens part corresponds to the second LED light-emitting module and is formed by a plurality of optical structures, the plurality of optical structures of the second lens part are arranged around the first lens part, the plurality of optical structures correspond to the plurality of LED light sources of the second LED light-emitting module one by one, one optical structure adjusts second light emitted by one corresponding LED light source, and the second lens part projects the second light to a second illumination area on the illumination plane; wherein the extent of the first illumination area is substantially equal to the extent of the second illumination area.

Optionally, the single optical structure of the first lens portion is a fresnel lens, and a vertical projection of the fresnel lens is located at a central position of a vertical projection of the second lens portion on the illumination plane.

Optionally, the fresnel lens is circular.

Optionally, the plurality of optical structures of the second lens portion are respectively total reflection lenses, and in the radial direction of the fresnel lens, the plurality of total reflection lenses are arranged around the fresnel lens; or, the plurality of optical structures of the second lens part are respectively total reflection lenses, and in the radial direction of the fresnel lens, the vertical projection of each total reflection lens is at least partially overlapped with the vertical projection of the fresnel lens.

Optionally, the plurality of total reflection lenses form a plurality of circles of coaxial distribution based on a central axis of the fresnel lens.

Optionally, the light source array of the first LED light emitting module includes a plurality of LED chips of different colors; and a plurality of LED light sources of the second LED light-emitting module are all packaged by white light LEDs.

Optionally, the plurality of LED chips of the first LED lighting module are respectively adjustable, so that the first light is tunable colored light; the second light can be made to be adjustable white light by adjusting the brightness of the white light LED package of the second LED light emitting module.

Optionally, the first LED light emitting module is composed of a red light emitting LED, a green light emitting LED and a blue light emitting LED to form a three primary color light emitting module.

Optionally, the first lens portion and the second lens portion are integrally molded; or the first lens part and the second lens part are respectively molded, the first lens part is provided with an installation wing plate, the second lens part is connected to the installation wing plate, and the middle part of the second lens part comprises a through hole for emitting the first light through the first lens part.

Optionally, the light source array of the first LED lighting module comprises a plurality of white LED packages; and a plurality of LED light sources of the second LED light-emitting module are all colored LED chip groups.

The utility model has the advantages that:

the utility model discloses a LED lighting device, send first light and second LED through first LED optical module and send the second light, and adopt corresponding optical structure to adjust luminance colour mixture to first light and second light, that is, first lens portion adjusts the back transmission illumination to first light spotlight, second lens portion adjusts the back transmission illumination to second light spotlight, and because first illumination zone scope of shining on the illumination plane after first lens portion spotlight is adjusted is equal to second lens portion spotlight basically and adjusts the back second illumination zone scope of shining on the illumination plane, at this moment, the illumination facula of first light and the illumination facula of second light realize basic coincidence on the illumination plane and obtain the even illuminating effect of colour mixture color.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.

Fig. 1 is a schematic view of a first lens portion of a lens of an LED lighting device according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;

fig. 3 is a schematic view of a second lens portion of a lens of an LED lighting device according to an embodiment of the present invention;

FIG. 4 is a cross-sectional view taken along line B-B of FIG. 3;

fig. 5 is a schematic view of a lens of an LED lighting device according to another embodiment of the present invention;

FIG. 6 is a cross-sectional view of the C-C square of FIG. 5;

fig. 7 is a schematic view of a lens of an LED lighting device according to still another embodiment of the present invention;

FIG. 8 is a cross-sectional view taken along line D-D of FIG. 7;

fig. 9 is a schematic layout diagram of the color LED lighting module and the white LED lighting module of the LED lighting device according to the embodiment of the present invention.

Wherein, in the figures, the respective reference numerals:

10. a first lens section; 11. installing wing plates; 20. a second lens section; 21. a total reflection lens; 22. a through hole; 101. a first LED light emitting module; 102. a second LED light emitting module; 103. positioning holes; 104. and connecting the holes.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Explanation: the Fresnel lens includes an intermediate lens portion and a screw-shaped lens portion surrounding the intermediate lens portion.

As shown in fig. 1 to 4 and 9, a structure of a lens applied in an LED lighting device according to an embodiment of the present invention is shown. In the present embodiment, the LED lighting device includes a light source and a lens, specifically, the light source includes a first LED light emitting module 101 and a second LED light emitting module 102, and the lens includes a first lens portion 10 and a second lens portion 20. The second LED light-emitting module 102 is disposed around the first LED light-emitting module 101, the first LED light-emitting module 101 includes a light source array formed by a plurality of adjacent LED chips, a light beam emitted by the first LED light-emitting module 101 is a first light, the second LED light-emitting module 102 includes a plurality of discretely distributed LED light sources, and a light beam emitted by each LED light source of the second LED light-emitting module 102 is a second light. In the lens, the first lens portion 10 is a single optical structure, and the first lens portion 10 is disposed corresponding to the first LED light emitting module 101, during the illumination operation, the first lens portion 10 adjusts the first light, and the first lens portion 10 adjusts the first light and projects the first light onto a first illumination area (not shown) on the illumination plane; the second lens portion 20 is composed of a plurality of optical structures, and the second lens portion 20 is disposed corresponding to the second LED lighting module 102, that is, the plurality of optical structures correspond to the plurality of LED light sources of the second LED lighting module 102 one by one, wherein the plurality of optical structures of the second lens portion 20 are disposed around the optical structure of the first lens, during the lighting operation, each optical structure of the second lens portion 20 correspondingly adjusts the second light, and then, the second lens portion 20 projects all the second light onto a second lighting area (not shown) on the lighting plane. Finally, the extent of the first illumination area is substantially equal to the extent of the second illumination area (i.e., the illumination spots within the extent of the first illumination area substantially coincide with the illumination spots within the extent of the second illumination area).

The LED lighting device of the utility model emits the first light through the plurality of LED chips of the first LED light-emitting module 101 and emits the second light through the plurality of LED light sources of the second LED light-emitting module 102, and the first light and the second light are subjected to dimming color mixing by adopting corresponding optical structures, that is, a single optical structure of the first lens portion 10 performs condensation adjustment on the first light to emit light for illuminating a first illumination area range, a plurality of optical structures of the second lens portion 20 performs condensation adjustment on the second light to emit light for illuminating a second illumination area range, and since the first illumination area range irradiated on the illumination plane after the first lens part 10 is subjected to the spotlight adjustment is substantially equal to the second illumination area range irradiated on the illumination plane after the second lens part 20 is subjected to the spotlight adjustment, at this time, the illumination light spots of the first light and the illumination light spots of the second light are basically overlapped on an illumination plane to obtain an illumination effect of uniform color mixture.

As shown in fig. 1 and 2, the single optical structure of the first lens portion 10 of the present invention is a fresnel lens, and specifically, the present embodiment preferably employs a fresnel lens having a circular structure. Specifically, on the illumination plane, the vertical projection of the fresnel lens is located at the central position of the vertical projection of the second lens portion 20, that is, the first light exits the illumination light after being subjected to the condensing adjustment by the fresnel lens to form a stable first illumination region range on the illumination plane.

As shown in fig. 3 and 4, in the present embodiment, one of the implementation manners of the second lens portion 20 of the present invention: the plurality of optical structures of the second lens portion 20 are respectively total reflection lenses 21 (that is, the total reflection lenses 21 are integrally formed lenses having a refractive optical portion in the middle and a total reflection optical portion in the periphery), and when the second lens portion 20 is assembled in the LED lighting device for dimming, a reflective cup is assembled between each LED light source and the corresponding total reflection lens, when the LED light source emits light to the second lens portion 20, the light passing through the refractive optical portion in the middle of the total reflection lenses is refracted and then emitted through a certain degree of light condensation, the light illuminating the total reflection optical portion in the periphery of the total reflection lenses is completely reflected to the reflective cup, and the reflective cup reflects the light to the refractive optical portion in the middle of the total reflection lenses again, and then the light is refracted and then emitted through a certain degree of light condensation. In the radial direction of the fresnel lens, a plurality of total reflection lenses 21 are disposed around the fresnel lens, and at this time, there is no overlapping portion between each of the total reflection lenses 21 and the fresnel lens. In this way, the plurality of total reflection lenses 21 overlap the emergent light rays on the illumination plane, so that the second light emitted through the second lens part 20 is projected onto the illumination plane to form a stable second illumination area range, and the first illumination area range and the second illumination area range are substantially equally overlapped together, thereby uniformly mixing the first light and the second light to realize a perfect illumination spot pattern.

Referring to fig. 3, the plurality of total reflection lenses 21 of the second lens portion 20 are formed in a multi-turn coaxial distribution form based on the central axis of the fresnel lens, so that it is convenient to design and arrange the plurality of total reflection lenses 21 and to prepare corresponding molds, and the design is simplified, thereby reducing the cost of preparing the second lens portion 20.

As shown in fig. 1 to 4, the first lens portion 10 and the second lens portion 20 of the present embodiment are manufactured by separate molding, wherein the mounting flange 11 is designed on the first lens portion 10, and the second lens portion 20 is fixed to the mounting flange 11 by a connection screw, so that the assembly work between the first lens portion 10 and the second lens portion 20 is simplified, and in order to prevent the second lens portion 20 from blocking the first light emitted from the first lens portion 10 after the assembly is completed, the middle portion of the second lens portion 20 is provided with a through hole 22, and the first light emitted from the first lens portion 10 can pass through the through hole 22 completely and without blocking. In the present embodiment, the first lens portion 10 and the second lens portion 20 may be made of the same material, for example, both of a glass material and an acrylic material; alternatively, the two lens portions are made of different materials, for example, the first lens portion 10 is made of acrylic material, the second lens portion 20 is made of glass material, and so on.

Referring to fig. 9 in combination, in the light source configuration, the light source array of the first LED light emitting module 101 of the present embodiment includes a plurality of LED chips (not shown) with different colors, and the plurality of LED light sources of the second LED light emitting module 102 are all white LED packages. The light emission of the plurality of LED chips in the first LED light emitting module 101 is adjustable, so that the first light emitted by the first LED light emitting module 101 is tunable colored light; in the second LED lighting module 102, the brightness of the second light emitted by each white LED package of the second LED lighting module 102 can be adjusted by adjusting the white LED package, so that the second light is adjustable white light. Preferably, in the present invention, the first LED lighting module 101 is composed of a red LED (R, not shown), a green LED (G, not shown) and a blue LED (B, not shown) to form an RGB three primary color lighting module.

In the LED lighting device of the present embodiment, the first LED lighting module 101 and the second LED lighting module 102 are assembled on the substrate to form a light source, a plurality of positioning holes 103 and a plurality of connecting holes 104 are formed on the substrate, and corresponding positioning posts (not shown) are disposed on the mounting flange 11, during the assembly process, the plurality of positioning holes 103 are first correspondingly aligned with the positioning posts, and then the substrate is fixedly connected to the mounting flange 11 by connecting screws through the connecting holes 104.

As shown in fig. 5 and 6, which illustrate a structure of a lens applied to another LED lighting device of the present invention, in the present embodiment, the first lens portion 10 and the second lens portion 20 are an integral lens structure integrally formed by using the same material, such as a 3D printing preparation process, an integral injection molding process, and the like, and the preparation material is, for example, a glass material, an acrylic material, and the like. The LED lighting device of this embodiment is the same as the LED lighting device of the previous embodiment except for the above structure, and the description thereof is omitted.

As shown in fig. 7 and 8, which illustrate the structure of the lens applied in another LED lighting device of the present invention, in another implementation manner of the second lens portion 20 in the present embodiment, the plurality of optical structures of the second lens portion 20 are similarly total reflection lenses 21 (i.e., the total reflection lenses 21 are integrally molded lenses with a refractive optical portion in the middle and a total reflection optical portion in the periphery), and, the perpendicular projection of the respective total reflection lens 21 onto the illumination plane at least partially overlaps the perpendicular projection of the fresnel lens onto the illumination plane in the radial direction of the fresnel lens, and, in this case, each of the total reflection lenses 21 is disposed to overlap with the screw-shaped lens portion of the fresnel lens (without an overlapping portion between each of the total reflection lenses 21 and the intermediate lens portion of the fresnel lens), therefore, the lenses (the first lens portion 10 and the second lens portion 20) of the present embodiment are formed as a single-piece lens manufactured by an integral forming process. The LED lighting device of this embodiment is the same as the LED lighting device of the previous embodiment except for the above structure, and the description thereof is omitted.

In another implementation manner of the LED lighting device (not shown), each light source array of the first LED lighting module 101 includes a plurality of white LED packages, and preferably, each light source array of the first LED lighting module 101 is a white LED package; accordingly, the plurality of LED light sources of the second LED lighting module 102 are all color LED chip sets, and preferably, each color LED chip set is an RGB three-color LED chip set composed of a red light LED (r), a green light LED (g), and a blue light LED (b) (of course, each color LED chip set may also be a color LED chip set composed of at least two of the red light LED, the green light LED, and the blue light LED). The LED lighting device of this embodiment is the same as the LED lighting device of the previous embodiment except for the above structure, and the description thereof is omitted.

In the process of color mixing illumination by applying the LED illumination device, the uniform illumination visual perception of colors such as sky cyan, pink, sea blue, sky blue and the like can be realized by uniformly mixing only by adjusting the spectrum light emitting ratio of the first light and the primary color spectrum light emitting ratio of the second light (taking the three-primary-color RGB light emitting module consisting of the red light LED, the green light LED and the blue light LED of the first LED light emitting module 101 and the plurality of LED light sources of the second LED light emitting module 102 which are all white light LED packaged as an example), so that the full-spectrum-adjusted color mixing illumination is realized, compared with the prior art, the full-spectrum color mixing illumination is surpassed, the full-spectrum color mixing adjustment is realized by basically projecting the color spectrum illumination light spots and the white light illumination light spots on the illumination plane in a superposition manner, the uniform illumination effect of color mixing is obtained, and the viewing experience of a viewer is more perfect, thereby providing more possibilities for optimized scene lighting, ambient lighting and accent lighting.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. An LED lighting device comprising a light source and a lens, characterized in that:

the light source includes: the LED module comprises a first LED light-emitting module and a second LED light-emitting module arranged around the first LED light-emitting module; the first LED light-emitting module comprises a light source array formed by a plurality of adjacent LED chips, and the second LED light-emitting module comprises a plurality of LED light sources which are distributed discretely;

the lens includes:

a first lens portion formed of a single optical structure corresponding to the first LED light emitting module, the first lens portion conditioning first light from the first LED light emitting module, the first lens portion projecting the first light onto a first illumination area on an illumination plane; and

a second lens portion corresponding to the second LED lighting module and formed by a plurality of optical structures, the plurality of optical structures of the second lens portion being disposed around the first lens portion, the plurality of optical structures corresponding to the plurality of LED light sources of the second LED lighting module one by one, one optical structure adjusting second light emitted from a corresponding one of the LED light sources, the second lens portion projecting the second light onto a second illumination area on the illumination plane;

wherein the extent of the first illumination area is substantially equal to the extent of the second illumination area.

2. The LED lighting device of claim 1, wherein: the single optical structure of the first lens portion is a fresnel lens, and a vertical projection of the fresnel lens is located at a central position of a vertical projection of the second lens portion on the illumination plane.

3. The LED lighting device of claim 2, wherein: the Fresnel lens is circular.

4. The LED lighting device of claim 2, wherein:

the plurality of optical structures of the second lens part are respectively total reflection lenses, and the plurality of total reflection lenses are arranged around the Fresnel lens in the radial direction of the Fresnel lens;

or, the plurality of optical structures of the second lens portion are respectively total reflection lenses, and in the radial direction of the fresnel lens, the vertical projection of each total reflection lens at least partially overlaps the vertical projection of the fresnel lens.

5. The LED lighting device of claim 4, wherein: the plurality of total reflection lenses form a plurality of circles of coaxial distribution based on the central axis of the Fresnel lens.

6. The LED lighting device of claim 1, wherein: the light source array of the first LED light-emitting module comprises a plurality of LED chips with different colors; and a plurality of LED light sources of the second LED light-emitting module are all packaged by white light LEDs.

7. The LED lighting device of claim 6, wherein: the plurality of LED chips of the first LED light-emitting module are respectively adjustable, so that the first light is tunable colored light; the second light can be made to be adjustable white light by adjusting the brightness of the white light LED package of the second LED light emitting module.

8. The LED lighting device of claim 6, wherein: the first LED light-emitting module consists of a red light-emitting LED, a green light-emitting LED and a blue light-emitting LED to form a three-primary-color light-emitting module.

9. The LED lighting device according to any one of claims 1 to 8, characterized in that:

the first lens part and the second lens part are integrally formed;

or, the first lens part and the second lens part are respectively molded, the first lens part is provided with a mounting wing plate, the second lens part is connected to the mounting wing plate, and the middle part of the second lens part comprises a through hole for the first light emitted through the first lens part.

10. The LED lighting device of claim 1, wherein: the light source array of the first LED light emitting module comprises a plurality of white light LED packages; the plurality of LED light sources of the second LED light-emitting module are all colored LED chip groups.