CN211558103U

CN211558103U - No light guide plate side income formula red green blue COB light source device with spotlight ware

Info

Publication number: CN211558103U
Application number: CN201921158956.9U
Authority: CN
Inventors: 文尚胜; 焦飞宇; 姜昕宇; 张博; 黄玮钊; 卢允乐
Original assignee: South China University of Technology SCUT
Current assignee: South China University of Technology SCUT
Priority date: 2019-07-22
Filing date: 2019-07-22
Publication date: 2020-09-25
Anticipated expiration: 2029-07-22

Abstract

The utility model discloses a light guide plate-free lateral entering type red, green and blue COB light source device with a condenser, which comprises a plurality of condensers, a bracket, a diffusion light plate, a diffuse reflection back plate and a frame plate; the light collectors are installed on the frame at intervals, the supports are fixed on the surfaces of the two ends of the diffusion light plate, the frame plate is installed on the supports, and the diffuse reflection back plate is installed at the top of the frame plate. The condenser mainly comprises a plurality of LED light sources, a light source bracket, a fiber lens, an outer reflecting surface and an inner reflecting surface; the optical fiber lens and the LED light source are fixed in the center of the surface of the cylindrical light source support, and the LED light source is positioned in the optical fiber lens; the outer reflecting surface is fixed on the edge of the surface of the light source support, and the inner reflecting surface is fixed on the surface of the fiber lens. The utility model discloses the LED area source of the no light guide plate that uses to have the spotlight ware has solved the big problem of high cost of light guide plate weight when improving the light efficiency, also avoids the thermal warpage problem of light guide plate.

Description

No light guide plate side income formula red green blue COB light source device with spotlight ware

Technical Field

The utility model belongs to the optics field, concretely relates to no light guide plate side income formula red green blue COB light source device with spotlight ware.

Background

With the rapid development of modern agriculture, developed regions are increasingly short of land, traditional agriculture is increasingly declining, and in order to meet the increasing grain demand, it is becoming a great trend that plant factories are established in developed countries such as effective Japan and Germany to develop vertical agriculture and modern agriculture vigorously. As a key ring of plant growth, light occupies an important position in the aspect of plant growth, and LED plant light sources are produced accordingly, but most of the LED light sources currently used in plant factories use optical structures according to conventional LED lamps, such as optical structures of LED spot lamps, optical structures of LED advertisement lamps, and simple array lamps, so that although design cost is saved, since most of the lamp beads of plant lighting lamps are red, blue, red, yellow, red, orange, and the like, the conventional optical structures are difficult to achieve a very uniform polychromatic light mixing effect, so that the surface of a plant to be illuminated is locally too bright or too dark or the spectral distribution is not uniform, the growth uniformity of the planted plants is difficult to ensure, and finally the quality of the plants produced in the whole batch is uneven. The lateral entrance type surface light source greatly reduces the light efficiency by adopting the light guide plate, but because the LED generates a large amount of heat in the lighting process, the temperature is too high in the narrow cavity of the lateral entrance type surface light source, and then the warping problem of the light guide plate is caused, so that the light efficiency is further reduced, and the production cost is increased due to the complex optical structure. Therefore, the utility model provides a scientific and reasonable's side income formula red green blue COB light source that has no light guide plate of spotlight ware to the aforesaid is not enough to the aforesaid, and it has all reached the very scientific effect that is favorable to vegetation in the aspect of illuminating effect and heat dissipation. The application in plant factories can have great application prospects. To the modern agriculture and the plant factory that develop rapidly, the utility model discloses a side income formula COB light source of no light guide plate with spotlight ware, very much relate to an illumination degree of consistency high, can all-round plant, the good COB plant lighting source's of heat dispersion scheme for solve the plant lighting lamp design unscientific at present on the market, the illumination effect is poor in the plant cultivation plane, the plant can not obtain the multi-angle illumination, the poor scheduling problem of heat dispersion. Aiming at the rapidly developed modern agriculture and plant factories, the COB plant lighting source which has high illumination uniformity, can irradiate plants in all directions and has excellent heat dissipation performance is particularly needed.

SUMMERY OF THE UTILITY MODEL

The utility model discloses an overcome prior art's shortcoming and not enough, utility model a red green blue COB plant light, this utility model mainly solve prior art not enough from improving the luminous effect of vegetation lamp, improving vegetation lamp incorruptibility, the three aspect of reduction in production cost, and the plant light has high efficiency, light and high incorruptibility moreover.

The utility model discloses at least, one of following technical scheme realizes.

A side-entry red, green and blue COB light source device without a light guide plate and provided with light collectors comprises a plurality of light collectors, a support, a diffusion light plate, a diffuse reflection back plate and a frame plate; the light collectors are installed on the frame at intervals, the supports are fixed on the surfaces of the two ends of the diffusion light plate, the frame plate is installed on the supports, and the diffuse reflection back plate is installed at the top of the frame plate.

Furthermore, each condenser mainly comprises a plurality of LED light sources, a light source bracket, a fiber lens, an outer reflecting surface and an inner reflecting surface; the optical fiber lens and the LED light source are fixed in the center of the surface of the cylindrical light source support, and one LED light source is positioned in one optical fiber lens; the outer reflecting surface is fixed on the edge of the light source support surface, and the inner reflecting surface is positioned in the outer reflecting surface and fixed on the surface of the fiber lens.

Further, the LED light source, the fiber lens, the outer reflecting surface and the inner reflecting surface are coaxially arranged.

Furthermore, the outer reflecting surface and the inner reflecting surface are injection-molded workpieces made of plastic materials.

Furthermore, the inner reflecting surface is a hollow cone, the top of the inner reflecting surface is positioned on the surface of the fiber lens, the outer reflecting surface is a hollow cone, and the surface with small diameter is fixed on the surface of the light source support.

Furthermore, the fiber lens is a glass fiber lens or an integrated fiber made of PMMA.

Furthermore, the inner surface and the outer surface of the outer reflecting surface reflect light, small holes with very small aperture (3-7 mm) are formed in the bottom of the outer reflecting surface and used for transmitting emergent light with a small angle, and light with a large angle (85-105 degrees) is primarily reflected by the outer surface.

Further, the LED light source is a COB-packaged red (R) green (G) blue (B) three primary color LED light source.

Furthermore, the diffusion plate is a double-sided prism diffusion plate which is integrally formed by injection molding and processing of PMMA materials.

Further, the bottom edge of the lower prism surface of the diffusion light plate is larger than the bottom edge of the upper prism surface, and the upper and lower prism surfaces are consistent in height.

Further, the LED light source is connected with an external driving circuit so as to meet the requirements of different plant seedlings on different respective spectrums; and the external drive circuit PAM and the PWM are combined.

The utility model discloses a red green blue COB plant lighting lamp device with high efficiency, high mixed light degree of consistency and high radiating effect, it mainly includes multiple reflection low-angle spotlight ware, diffuse reflection backplate, double sided prism diffuser plate. The LED light source can adjust the light-emitting spectrum of the lamp through the multi-path PWM signals sent by the external driving circuit aiming at different types of plants so as to meet the requirements of different plant seedlings on different spectra. The LED optical component mainly comprises a multiple reflection small-angle condenser and an LED light source, wherein the multiple reflection small-angle condenser is used for realizing small-angle light emitting. The small-angle condenser is used for primarily coupling light emitted by the LED light source through the optical fiber lens to preliminarily compress the large-angle lambertian-like light source of the LED light source into a small angle, so that the light rays as much as possible can be reflected by the internal reflection surface, the internal reflection surface is provided with a small hole, the aperture is very small, only the small-angle light rays which are converged for the first time through the optical fiber lens are allowed to pass through, and further the large-angle light rays are emitted at a small angle after primary reflection of the internal reflection surface and secondary reflection of the external reflection surface. Meanwhile, for a COB-packaged red (R), green (G) and blue (B) LED light source, the fiber lens can play a certain light mixing effect, and the process of coupling out small angles completely only relates to the reflection effect, so that the color mixing uniformity of finally emergent light is superior to the emergent result of the currently proposed effect of adopting the total internal reflection lens; the efficient diffuse reflection backboard is beneficial to improving the diffuse reflection efficiency, enables the light to be more uniform and is beneficial to obtaining a larger glancing light area; the double sided prism diffuser helps to solve the problem of severe fresnel reflections due to excessive glancing angles. The drive circuit is a dual modulation drive circuit combining PAM and PWM, and combines the advantages of high luminous efficiency of PAM and flexible PWM dimming performance. The dimming circuit consists of a power loop and a control loop. The power loop is a power main loop and comprises an input rectifying and filtering circuit, a power conversion circuit and an output rectifying and filtering circuit, the current amplitude can be changed to perform color drift compensation in the actual dimming process, the luminous flux of an LED is adjusted by adjusting the duty ratio, so that the problem of color temperature drift caused by the problems of junction temperature change, aging and the like of the LED can be solved, the current peak value can be adjusted to compensate the color temperature drift under the condition of not changing the average current, and the light output of the lamp is stable, accurate and efficient.

Compared with the prior art, the utility model has the following advantages:

1. the COB-packaged red (R), green (G), blue (B) tricolor LED light source is applied, the basic light mixing problem of the LED light source is combined with the specific optical structure of a specific lamp, and the light mixing uniformity of the plant illuminating lamp is improved comprehensively, in multiple angles and systematically from the angles of photometry and colorimetry.

2. The lateral entrance type surface light source is applied, so that the light and thin optical element is convenient to manufacture, and the thinning and light weight development of the LCD display is facilitated.

3. By applying the LED surface light source without the light guide plate with the condenser, the light effect is improved from an optical angle, the problem of heavy weight and high cost of the light guide plate is solved, and the influence of the thermal warping problem of the light guide plate on the optical performance is also avoided.

4. The structure of combining the high-efficiency diffuse reflection back plate and the double-sided prism diffusion plate is used, the problem of serious Fresnel reflection caused by overlarge grazing angle is solved, and the light mixing uniformity and the grazing light emitting area of the lamp are improved.

5. The application of the dual modulation combining Pulse Width Modulation (PWM) and Pulse Amplitude Modulation (PAM) is beneficial to efficiently and accurately modulating the plant lighting source.

Drawings

Fig. 1 is a structural diagram of a side-in red, green and blue COB light source device without a light guide plate with a condenser of the present invention;

fig. 2 is a schematic diagram of the arrangement of the optical concentrators on the frame plate according to the present invention;

figure 3 is a schematic view of the inventive concentrator;

figure 4 is a cross-sectional view of the inventive concentrator;

FIG. 5 is a schematic diagram of a double sided prism diffuser plate according to the present invention;

wherein: 1-LED light source, 2-fiber lens, 3-light source support, 4-external reflection surface, 5-internal reflection surface, 6-support, 7-diffusion light plate, 8-diffuse reflection back plate and 9-frame plate.

Detailed Description

The present invention will be described in further detail with reference to the following examples and drawings, but the present invention is not limited thereto.

As shown in fig. 1, a light guide plate-free side-entry red, green and blue COB light source device with light collectors includes a plurality of light collectors, two brackets 6, a diffusion light plate 7, a diffuse reflection back plate 8 and two frame plates 9; the light collectors are attached to the frame plates 9 at intervals, the supports 6 are fixedly mounted on the surfaces of the two ends of the diffusion light plate 7 through screws, one frame plate 9 is mounted on one support 6, the diffuse reflection back plate 8 is fixedly mounted at the top of the frame plate 9 through screws, and the light collectors on the two frame plates 9 are in mirror symmetry.

As shown in fig. 3 and 4, each condenser mainly includes a plurality of LED light sources 1, a light source bracket 3, a fiber lens 2, an outer reflecting surface 4 and an inner reflecting surface 5; the optical fiber lens 2 and the LED light source 1 are fixed in the center of the surface of the cylindrical light source support 3 through sealant, and the LED light source 1 is positioned in the optical fiber lens 2; the outer reflecting surface 4 is fixed on the edge of the surface of the light source support 3 through sealant, and the inner reflecting surface 5 is fixed on the surface of the fiber lens 2 through sealant. As shown in fig. 2, the concentrators are arranged in an array on a bezel 9.

The LED light source 1, the optical fiber lens 2, the outer reflecting surface 4 and the inner reflecting surface 5 are coaxially arranged.

The LED light source 1 is a COB-packaged red R green G blue B tricolor LED light source.

The outer reflecting surface 4 and the inner reflecting surface 5 are both ABS plastic injection molding workpieces; the inner reflecting surface 5 is a hollow cone, the top of the cone is positioned on the fiber lens 2, the outer reflecting surface 4 is a hollow cone, and the surface with small diameter is fixed on the surface of the cylindrical light source support 3.

The fiber lens 2 is a glass fiber lens or an integrated fiber made of PMMA.

The inner surface and the outer surface of the outer reflecting surface 4 reflect light, a small hole with a very small aperture (3-7 mm) is formed in the bottom of the outer reflecting surface and used for transmitting emergent light with a small angle, and light with a large angle (85-105 degrees) is primarily reflected by the outer surface.

The diffusion plate 7 is a double-sided prism diffusion plate integrally formed by injection molding and processing of PMMA materials. The bottom side of the lower prism surface of the diffusion light plate 7 is larger than the triangle of the upper prism surface, and the heights of the upper and lower prism surfaces are consistent. As shown in fig. 5, the large-angle glancing light is refracted for many times by the upper and lower prism surfaces and exits at a small angle, thereby solving the problem of serious fresnel reflection caused by an excessively large glancing angle.

The above embodiments are the preferred embodiments of the present invention, but the embodiments of the present invention are not limited by the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be equivalent replacement modes, and all are included in the protection scope of the present invention.

Claims

1. A light guide plate-free lateral-entering type red, green and blue COB light source device with light collectors is characterized by comprising a plurality of light collectors, a support (6), a diffusion light plate (7), a diffuse reflection back plate (8) and a frame plate (9); the light gathering devices are installed on the frame plate (9) at intervals, the supports (6) are fixed on the surfaces of the two ends of the diffusion light plate (7), the frame plate (9) is installed on the supports (6), and the diffuse reflection back plate (8) is installed at the top of the frame plate (9).

2. The light guide plate-free lateral-entry red, green and blue COB light source device with light collectors according to claim 1, wherein each light collector mainly comprises an LED light source (1), a light source bracket (3), a fiber lens (2), an external reflecting surface (4) and an internal reflecting surface (5); the fiber lens (2) and the LED light source (1) are fixed in the center of the surface of the cylindrical light source support (3), and one LED light source (1) is positioned in one fiber lens (2); the outer reflecting surface (4) is fixed on the edge of the surface of the light source support (3), and the inner reflecting surface (5) is positioned in the outer reflecting surface (4) and fixed on the surface of the fiber lens (2).

3. The light guide plate-free lateral-entry red, green and blue COB light source device with the condenser as claimed in claim 2, wherein the LED light source (1), the fiber lens (2), the external reflecting surface (4) and the internal reflecting surface (5) are coaxially installed.

4. The light guide plate-free lateral red, green and blue COB light source device with the light condenser as claimed in claim 2, wherein the outer reflecting surface (4) and the inner reflecting surface (5) are injection molded plastic parts.

5. The light guide plate-free lateral-entry red, green and blue COB light source device with the light condenser as claimed in claim 2, wherein the internal reflection surface (5) is a hollow cone with the top located above the fiber lens (2), and the external reflection surface (4) is a hollow cone with a small diameter surface fixed on the surface of the light source support (3).

6. The light guide plate-free lateral-entry red, green and blue COB light source device with the light condenser as claimed in claim 2, wherein the fiber lens (2) is a glass fiber lens or an integrated fiber made of PMMA.

7. The light guide plate-free lateral-entry red, green and blue COB light source device with the light condenser as claimed in claim 2, wherein the outer reflecting surface (4) reflects light from both the inner and outer surfaces, and has a hole with a diameter of 3-7mm at the bottom, and the primary reflection angle of the outer surface is 85 ° -105 °.

8. The light guide plate-free lateral-entry red, green and blue COB light source device with the light condenser as claimed in claim 2, wherein the LED light source (1) is a COB-packaged red, green and blue tricolor LED light source.

9. The light guide plate-free lateral-entry red, green and blue COB light source device with the light condenser as claimed in claim 1, wherein the diffuser (7) is a double-sided prism diffuser integrally formed by injection molding and processing of PMMA.

10. The light guide plate-free lateral-entry red, green and blue COB light source device with the light condenser as claimed in claim 1, wherein the bottom edge of the lower prism surface of the diffusion light plate (7) is larger than the bottom edge of the upper prism surface, and the heights of the upper and lower prism surfaces are the same.