LED light source structure for efficient fluorescence conversion

Abstract

The utility model discloses an efficient fluorescence conversion LED light source structure which is characterized in that a total reflection layer covers the outer side of an LED lamp bead, a semi-reflection layer is arranged on the upper portion of the total reflection layer, the section lines of the reflection surfaces of the total reflection layer and the semi-reflection layer are located on the same ellipse, the LED lamp bead is located on one focus of the ellipse, and the LED lamp bead is located on the other focus of the ellipse. Fluorescent powder is arranged at the other focus of the ellipse, and a light hole is formed in the middle of the semi-reflection layer. Divergent light rays emitted by the LED lamp beads are reflected to the other oval focus through the reflecting surfaces of the total reflection layer and the semi-reflection layer, and the fluorescent powder is arranged at the other focus, so that the light rays reflected by the total reflection layer and the semi-reflection layer are reflected and gathered to the fluorescent powder, the light rays emitted by the LED lamp beads are fully utilized, and the service life of the LED lamp beads is prolonged. The fluorescence conversion efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of LED light sources, in particular to a high-efficiency fluorescence conversion LED light source structure. Background Art

[0002] LEDs, or light-emitting diodes, represent a revolutionary advancement in contemporary lighting technology. As a solid-state lighting technology, LEDs achieve efficient and energy-saving lighting by directly converting electrical energy into light. Their notable features include high brightness, low power consumption, long life, and excellent environmental adaptability. Compared to traditional lighting sources, LEDs offer higher luminous efficiency, significantly reducing energy consumption at comparable brightness, contributing to energy conservation, emission reduction, and environmental protection. Furthermore, LEDs boast an extremely long lifespan, typically reaching tens of thousands of hours, significantly reducing the frequency of lamp replacements and maintenance costs. Furthermore, LEDs offer rich colors, easy dimming control, and fast response times, making them widely used in a variety of applications, including home lighting, commercial lighting, road lighting, and automotive lighting. With continuous technological advancements and further cost reductions, LEDs are becoming the mainstream choice in the lighting market, leading the lighting industry towards a greener, smarter, and more efficient future.

[0003] The light emitted by LEDs is primarily blue, but phosphors absorb this blue light and convert it into other colors, such as yellow or green. This mixture then produces white light or other desired colors. This process enables LED lighting to offer a wider range of colors and better color temperature control, meeting diverse lighting needs. The phosphors convert some of the invisible light emitted by the LED chip (such as ultraviolet light or shortwave blue light) into visible light, increasing the light source's luminous efficiency and brightness, making LED lighting brighter and more energy-efficient. However, existing LED light sources have low light energy utilization efficiency, resulting in low phosphor conversion efficiency, and the luminous efficiency of LED light sources needs to be improved. Utility Model Content

[0004] The purpose of the utility model is to solve the above technical problems and provide a highly efficient fluorescent conversion LED light source structure.

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

[0006] A high-efficiency fluorescent conversion LED light source structure includes a heat dissipation substrate and an LED lamp bead fixed on the heat dissipation substrate. The outer cover of the LED lamp bead is provided with a total reflection layer, and the upper portion of the total reflection layer is provided with a semi-reflection layer. The reflective surface cross-section lines of the total reflection layer and the semi-reflection layer are located on the same ellipse, and the LED lamp bead is located at one focus of the ellipse. Phosphor is provided at the other focus of the ellipse. A light-transmitting hole is opened in the middle of the semi-reflection layer.

[0007] Furthermore, the semi-reflective layer is a coating that reflects light in the blue band and transmits light in the white light band.

[0008] Furthermore, a reflective tube is fixedly connected to the heat dissipation substrate, a reflective cavity is opened in the reflective tube, the total reflection layer is fixed on the inner wall of the reflective cavity, a lens is fixedly connected to the upper end of the reflective tube, the phosphor is arranged in the lens, the end of the lens away from the substrate is provided with a convex curved surface, and the semi-reflective layer is fixed on the convex curved surface of the lens.

[0009] Furthermore, the reflective cavity is a rotating body structure formed by rotating an elliptical arc.

[0010] Furthermore, the total reflection layer is a silver-plated layer or a chrome-plated layer.

[0011] Furthermore, the end surface of the lens close to the LED lamp bead is a planar structure passing through the focus of the cross-sectional ellipse.

[0012] Furthermore, the reflective cylinder includes an upper cylinder and a lower cylinder, the interface between the upper cylinder and the lower cylinder is located at the widest part of the middle of the cross-sectional ellipse, and the upper cylinder and the lower cylinder are fixed together by gluing.

[0013] Furthermore, a mounting plate is fixedly connected to the bottom of the LED lamp bead, and the mounting plate is fixed on the heat dissipation substrate.

[0014] Furthermore, the heat dissipation substrate is a heat-conducting metal plate.

[0015] In another embodiment, a transparent light guide is fixedly connected to the heat dissipation substrate, the shape of the light guide is elliptical, the total reflection layer covers the light guide, and the semi-reflection layer covers the end of the light guide away from the LED lamp beads; the phosphor is arranged in the light guide.

[0016] Furthermore, the light guide body includes a first light guide part and a second light guide part, the second light guide part is fixed on the heat dissipation substrate, the first light guide part is fixed on the second light guide part, and the phosphor is arranged at the connection between the first light guide part and the second light guide part.

[0017] The utility model provides a high-efficiency fluorescent conversion LED light source structure, which has the following beneficial effects: by providing a total reflection layer and a semi-reflection layer, the reflection surfaces of the total reflection layer and the semi-reflection layer are ellipsoidal surfaces formed by the rotation of an ellipse, and the LED lamp bead is located at the focus, so that the divergent light emitted by the LED lamp bead and projected on the total reflection layer and the semi-reflection layer will be reflected to the other focus of the ellipse; by arranging the phosphor at the other focus, the light reflected by the total reflection layer and the semi-reflection layer is reflected to the phosphor, and the phosphor absorbs this part of the reflected light and converts it into light of other desired colors, and finally mixes to form white light and emits from the light-transmitting hole; the elliptical reflection surface can fully reflect the light emitted by the LED lamp bead and concentrate it on the phosphor, so that the phosphor can emit more light, thereby making full use of the light emitted by the LED lamp bead and improving the fluorescent conversion efficiency; the light emitted by the LED lamp bead is concentrated into a point after reflection, and the scattered light is concentrated into a very small light-emitting point located at the position of the phosphor. The smaller the light-emitting point, the easier it is to concentrate the light energy, and the luminous efficiency of the LED is greatly improved under the condition of the same lumen value. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The specific embodiments of the present invention are described in further detail below with reference to the accompanying drawings:

[0019] Figure 1 This is a schematic diagram of the three-dimensional structure of a high-efficiency fluorescence conversion LED light source structure provided by the utility model;

[0020] Figure 2 This is a schematic cross-sectional view of a high-efficiency fluorescence conversion LED light source structure provided by the present invention;

[0021] Figure 3 This is a schematic diagram of the three-dimensional structure of a reflector tube in a high-efficiency fluorescent conversion LED light source structure provided by the utility model;

[0022] Figure 4 This is a schematic cross-sectional view of a reflective tube in a high-efficiency fluorescent conversion LED light source structure provided by the present invention;

[0023] Figure 5 A schematic diagram of the light path of a high-efficiency fluorescent conversion LED light source structure provided by the present invention when in use;

[0024] Figure 6 This is a schematic cross-sectional view of another embodiment of a high-efficiency fluorescence conversion LED light source structure provided by the present invention;

[0025] Figure 7 This is a schematic diagram of the light path of another embodiment of a high-efficiency fluorescence conversion LED light source structure provided by the present invention during use.

[0026] Explanation of the numbers in the figure: 1. Heat dissipation substrate; 2. LED lamp beads; 3. Reflection tube; 31. Reflection cavity; 33. Upper tube; 34. Lower tube; 4. Lens; 5. Phosphor; 6. Total reflection layer; 7. Semi-reflection layer; 71. Light-transmitting hole; 8. Mounting plate; 9. Light guide; 91. First light guide part; 92. Second light guide part. DETAILED DESCRIPTION

[0027] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] It should be noted that all directional indications in the embodiments of the present invention (such as up-down-left-right-front-back...) are only used to explain the relative position relationship - movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly. The connection can be a direct connection or an indirect connection.

[0030] like Figure 1-Figure 5 As shown, a high-efficiency fluorescent conversion LED light source structure includes a heat dissipation substrate 1 and an LED lamp bead 2 fixed on the heat dissipation substrate 1, the outer cover of the LED lamp bead 2 is provided with a total reflection layer 6, the upper part of the total reflection layer 6 is provided with a semi-reflection layer 7, the reflective surface cross-section lines of the total reflection layer 6 and the semi-reflection layer 7 are located on the same ellipse, and the LED lamp bead 2 is located at one focus of the ellipse, and phosphor 5 is provided at the other focus of the ellipse, and a light-transmitting hole 71 is opened in the middle of the semi-reflection layer 7.

[0031] The above technical solution is adopted, by setting a total reflection layer 6 and a semi-reflection layer 7, the reflection surfaces of the total reflection layer 6 and the semi-reflection layer 7 are ellipsoidal surfaces formed by the rotation of an ellipse, and the LED lamp bead 2 is located at the focus, so that the light emitted by the LED lamp bead 2 projected on the total reflection layer 6 and the semi-reflection layer 7 will be reflected to the other focus of the ellipse, and by setting the phosphor 5 at the other focus, the light reflected by the total reflection layer 6 and the semi-reflection layer 7 is reflected to the phosphor 5, and the phosphor 5 absorbs this part of the reflected light and converts it into light of other colors required, and finally mixes to form white light and emits from the light-transmitting hole 71; the elliptical reflection surface can fully reflect the light emitted by the LED lamp bead 2 to the phosphor 5, so that the phosphor 5 can emit more light, thereby making full use of the light emitted by the LED lamp bead 2 and improving the fluorescence conversion efficiency; the light emitted by the LED lamp bead 2 is reflected and converged into point light, and the scattered light is concentrated into a very small light-emitting point at the position of the phosphor 5. The smaller the light-emitting point, the easier it is to concentrate the light energy, and the luminous efficiency of the LED is greatly improved under the same lumen value.

[0032] The semi-reflective layer 7 is a coating that reflects blue light and transmits white light. Thus, the semi-reflective layer 7 reflects the blue light emitted by the LED lamp beads 2 toward the phosphor 5. The phosphor 5 then converts the light from the LED lamp beads 2 into the external environment through the light-transmitting holes 71 in the semi-reflective layer 7, improving the light conversion efficiency and making the light emitted through the light-transmitting holes 71 more focused.

[0033] A reflective tube 3 is fixedly connected to the heat dissipation substrate 1. A reflective cavity 31 is defined within the reflective tube 3. The total reflective layer 6 is fixed to the inner wall of the reflective cavity 31. A lens 4 is fixedly connected to the upper end of the reflective tube 3. The phosphor 5 is disposed within the lens 4. The end of the lens 4 facing away from the substrate is provided with a convex curved surface. The semi-reflective layer 7 is fixed to the convex curved surface of the lens 4. By providing the reflective tube 3 as a support for the total reflective layer 6 and the lens 4 as a support for the semi-reflective layer 7, the molding of the total reflective layer 6 and the semi-reflective layer 7 is facilitated.

[0034] The reflective cavity 31 is a rotating body structure formed by the rotation of an elliptical arc. The total reflection layer 6 is a silver-plated layer or a chrome-plated layer. This facilitates processing and can better reflect light. The end face of the lens 4 near the LED lamp bead 2 is a planar structure at the focus of the cross-sectional ellipse.

[0035] Specifically, the reflector tube 3 comprises an upper tube 33 and a lower tube 34. The interface between the upper and lower tubes 33 and 34 is located at the widest point in the middle of the elliptical cross section. The upper and lower tubes 33 and 34 are integrally bonded by gluing. By dividing the reflector tube 3 into the upper and lower tubes 33 and 34 along the widest point, the molding and demolding of the upper and lower tubes 33 and 34 is facilitated.

[0036] The bottom of the LED lamp bead 2 is fixedly connected to a mounting plate 8, which is fixed to a heat dissipation substrate 1. The heat dissipation substrate 1 is a heat-conducting metal plate; preferably, it is an aluminum alloy plate. This utilizes the excellent thermal conductivity of the aluminum alloy to quickly dissipate the heat generated by the LED lamp bead 2.

[0037] In another embodiment, Figure 6-7 As shown, a transparent light guide 9 is fixedly connected to the heat dissipation substrate 1. The light guide 9 has an elliptical shape. The total reflection layer 6 covers the light guide 9, and the semi-reflection layer 7 covers the end of the light guide 9 away from the LED lamp beads 2. The phosphor 5 is disposed in the light guide 9. The light guide 9 supports the total reflection layer 6 and the semi-reflection layer 7, thereby providing an attachment for the total reflection layer 6 and the semi-reflection layer 7. The transparent material allows light to pass freely through the light guide 9.

[0038] Specifically, the light guide 9 includes a first light guide portion 91 and a second light guide portion 92. The second light guide portion 92 is fixed to the heat dissipation substrate 1, and the first light guide portion 91 is fixed to the second light guide portion 92. The phosphor 5 is disposed at the junction of the first light guide portion 91 and the second light guide portion 92. By dividing the light guide 9 into two parts, the first light guide portion 91 and the second light guide portion 92, and then splicing them together, it is convenient to dispose the phosphor 5 at the junction of the two parts. Specifically, a groove can be provided in the first light guide portion 91 or the second light guide portion 92, with the groove corresponding to the focus of the reflective ellipse, and the phosphor 5 is disposed in the groove.

[0039] The parts not involved in this technical solution can be implemented using existing technologies.

[0040] The above shows and describes the basic principles, main features, and characteristics of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention shall include the appended claims and their equivalents.

Claims

1. A highly efficient fluorescent light conversion LED light source structure, characterized by: The invention comprises a heat dissipation substrate (1) and an LED lamp bead (2) fixed on the heat dissipation substrate (1); the outer cover of the LED lamp bead (2) is provided with a total reflection layer (6); a semi-reflection layer (7) is provided on the upper part of the total reflection layer (6); the cross-sectional lines of the reflection surfaces of the total reflection layer (6) and the semi-reflection layer (7) are located on the same ellipse, and the LED lamp bead (2) is located at one focus of the ellipse; phosphor (5) is provided at the other focus of the ellipse; and a light-transmitting hole (71) is provided in the middle of the semi-reflection layer (7).

2. The high-efficiency fluorescent conversion LED light source structure according to claim 1, characterized in that: A reflective cylinder (3) is fixedly connected to the heat dissipation substrate (1), a reflective cavity (31) is provided in the reflective cylinder (3), the total reflection layer (6) is fixed on the inner wall of the reflective cavity (31), a lens (4) is fixedly connected to the upper end of the reflective cylinder (3), the fluorescent powder (5) is arranged in the lens (4), an end of the lens (4) away from the substrate is provided with an outwardly convex arc surface, and the semi-reflective layer (7) is fixed on the outwardly convex arc surface of the lens (4).

3. The high-efficiency fluorescent conversion LED light source structure according to claim 2, characterized in that: The reflection cavity (31) is a rotating body structure formed by rotating an elliptical arc.

4. The high-efficiency fluorescent conversion LED light source structure according to claim 1, characterized in that: The total reflection layer (6) is a silver-plated layer or a chromium-plated layer.

5. The high-efficiency fluorescent conversion LED light source structure according to claim 2, characterized in that: The end surface of the lens (4) close to one end of the LED lamp bead (2) is a planar structure passing through the focus of the cross-sectional ellipse.

6. The high-efficiency fluorescent conversion LED light source structure according to claim 2, characterized in that: The reflective cylinder (3) comprises an upper cylinder (33) and a lower cylinder (34), wherein the interface between the upper cylinder (33) and the lower cylinder (34) is located at the widest part of the middle of the cross-sectional ellipse, and the upper cylinder (33) and the lower cylinder (34) are fixedly connected as one by gluing.

7. The high-efficiency fluorescent conversion LED light source structure according to claim 1, characterized in that: The bottom of the LED lamp bead (2) is fixedly connected to a mounting plate (8), and the mounting plate (8) is fixed on the heat dissipation substrate (1).

8. The high-efficiency fluorescent conversion LED light source structure according to claim 1, characterized in that: The heat dissipation substrate (1) is a heat-conducting metal plate.

9. The high-efficiency fluorescent conversion LED light source structure according to claim 1, characterized in that: A transparent light guide (9) is fixedly connected to the heat dissipation substrate (1); the light guide (9) has an elliptical shape; the total reflection layer (6) covers the light guide (9); and the semi-reflection layer (7) covers the end of the light guide (9) away from the LED lamp bead (2); and the fluorescent powder (5) is arranged in the light guide (9).

10. The high-efficiency fluorescent conversion LED light source structure according to claim 9, characterized in that: The light guide (9) comprises a first light guide portion (91) and a second light guide portion (92); the second light guide portion (92) is fixed on a heat dissipation substrate (1); the first light guide portion (91) is fixed on the second light guide portion (92); and the phosphor (5) is arranged at the connection between the first light guide portion (91) and the second light guide portion (92).

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