High-efficiency LED light source

Abstract

The present invention relates to the technical field of LED light sources, and discloses a high-light-efficiency LED light source, comprising a substrate, wherein the substrate is provided with a light-emitting area, the light-emitting area is provided with a light-emitting chip, the light-emitting chip has a top light-emitting surface and a side light-emitting surface; a side interval is provided between adjacent side light-emitting surfaces, the side interval is provided with a frustum column, and there is a column interval between the frustum columns; the outer periphery of the frustum columns is coated with a reflective adhesive layer; the light-emitting area is filled with a fluorescent adhesive layer, the light emitted from the top light-emitting surface directly passes through the fluorescent adhesive layer to irradiate outward, and the light emitted from the side light-emitting surface irradiates the reflective adhesive layer of multiple frustum columns, and after being reflected by the reflective adhesive layer, it passes through the fluorescent adhesive layer to irradiate outward; multiple frustum columns are provided in the side interval, which can reflect the light emitted from the side light-emitting surface over a large range, and there are column intervals between the frustum columns, which can realize multiple reflections of the light between the column intervals, etc., thereby realizing diversified reflection of the light and greatly improving the light efficiency of the LED light source.

Description

Technical Field

[0001] The invention relates to the technical field of LED light sources, and more specifically, to high-efficiency LED light sources. Background Art

[0002] LED light sources have the advantages of small size, long life and high efficiency. They can be used continuously for up to 100,000 hours and have become the mainstream in the lighting field.

[0003] The LED light source includes a substrate, which is provided with a light-emitting area, on which a plurality of light-emitting chips are provided, and a fluorescent adhesive layer is covered on the light-emitting area. The light emitted by the light-emitting chip passes through the fluorescent adhesive layer and irradiates outward. The light is excited by the fluorescent powder in the fluorescent adhesive layer, so that the light irradiated outward meets the set requirements.

[0004] In the prior art, the light-emitting chip is in the shape of a cube, with a top light-emitting surface on the top of the light-emitting chip and multiple side light-emitting surfaces on the periphery of the light-emitting chip. The light emitted by the top light-emitting surface is irradiated outward through the fluorescent adhesive layer. However, the light emitted by the side light-emitting surface is horizontally straight and cannot be reflected and then irradiated outward through the fluorescent adhesive layer. The reflection effect of the LED light source is poor, resulting in the defect of low light efficiency of the LED light source. Summary of the Invention

[0005] The purpose of the present invention is to provide a high-light-efficiency LED light source, aiming to solve the problem of low light-efficiency of LED light sources in the prior art.

[0006] The present invention is achieved by providing a high-light-efficiency LED light source, comprising a substrate, the substrate having a light-emitting area, the light-emitting area having a plurality of light-emitting chips arranged at intervals, the light-emitting chips being in a cubic shape, the top of the light-emitting chip having a top light-emitting surface, the periphery of the light-emitting chip having a plurality of side light-emitting surfaces, the bottom of the light-emitting chip having a bottom surface, the bottom surface being fixed to the bottom of the light-emitting area;

[0007] There is a side spacer between the side light-emitting surfaces of adjacent light-emitting chips, and the side spacer is provided with a plurality of spaced-apart frustum columns, with column spacers between adjacent frustum columns; the outer periphery of the frustum columns is coated with a reflective adhesive layer, the reflective adhesive layer is arranged around the circumference of the frustum columns, and is arranged obliquely away from the side light-emitting surface along the frustum columns from bottom to top;

[0008] The light-emitting area is filled with a fluorescent glue layer, which covers multiple light-emitting chips and multiple frustum columns. The light emitted from the top light-emitting surface is irradiated outward through the fluorescent glue layer, and the light emitted from the side light-emitting surface is reflected by the reflective glue layer and then irradiated outward through the fluorescent glue layer.

[0009] Furthermore, the top of the fluorescent glue layer has a top surface, and the top surface is arched upward.

[0010] Furthermore, a flat disc-shaped disc surface is formed in the middle of the top surface.

[0011] Furthermore, the top of the substrate is recessed to form the light-emitting area, and the bottom surface of the light-emitting chip is fixedly docked to the bottom of the light-emitting area.

[0012] Furthermore, the periphery of the light-emitting area has a peripheral wall arranged around it, and the peripheral wall is arranged around the periphery of the light-emitting area. There is a peripheral gap between the peripheral wall and the side light-emitting surface, and the peripheral gap is arranged around the periphery of the light-emitting area.

[0013] Furthermore, along the direction from bottom to top of the light-emitting area, the peripheral wall is arranged to be tilted outward away from the light-emitting area, and the light emitted by the side light-emitting surface is reflected by the peripheral wall and then irradiated outward through the fluorescent glue layer.

[0014] Furthermore, the frustum column is provided with a central hole running through it from top to bottom, the bottom of the frustum column is docked with the bottom of the light-emitting area, the bottom of the central hole is closed, and the top of the central hole forms a top opening;

[0015] The top of the reflective adhesive layer extends into the middle hole through the top opening to form an inner-hole section. The lower part of the inner-hole section fills the lower part of the middle hole, and the upper part of the inner-hole section fills the upper part of the middle hole, and surrounds to form a hollow section. The fluorescent adhesive layer fills the hollow section and is integrated with the reflective adhesive layer.

[0016] Furthermore, the reflective adhesive layer extends to the lower part of the column spacer to form a reflective wall segment, the upper part of the column spacer forms an upper area, and the fluorescent adhesive layer fills the upper area and is integrated with the reflective wall segment.

[0017] Furthermore, both sides of the reflective wall segment have side walls facing the side luminous surface. Along the direction from bottom to top of the side walls, the side walls are arranged obliquely away from the side luminous surface. The light emitted by the side luminous surface is reflected by the side walls and then irradiated outward through the fluorescent glue layer.

[0018] Furthermore, an outer dam is provided on the substrate, and the outer dam is arranged around the circumference of the light-emitting area. There is an annular area between the outer dam and the outer periphery of the light-emitting area, and the annular area is arranged around the circumference of the light-emitting area; the outer periphery of the fluorescent glue layer covers the annular area and is docked on the outer dam.

[0019] Compared with the existing technology, the high-light-efficiency LED light source provided by the present invention has light emitted from the top light-emitting surface of the light-emitting chip directly irradiates outward through the fluorescent adhesive layer, and light emitted from the side light-emitting surface irradiates the reflective adhesive layer of multiple frustum columns. After being reflected by the reflective adhesive layer, it is then irradiated outward through the fluorescent adhesive layer, greatly improving the light efficiency of the LED light source.

[0020] Secondly, a plurality of frustum columns are provided in the side intervals, which can reflect the light emitted from the side light-emitting surface over a large range, and there are column intervals between the frustum columns, which can realize multiple reflections of the light between the column intervals, etc., realizing diversified reflection of the light and greatly improving the luminous efficiency of the LED light source. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 1 is a schematic cross-sectional view of a high-light-efficiency LED light source provided by the present invention;

[0022] Figure 2 It is a basic main view schematic diagram provided by the present invention;

[0023] Figure 3 This is a front view schematic diagram of the connection between the frustum column and the reflective wall segment provided by the present invention;

[0024] Figure 4 It is a schematic cross-sectional view of the frustum column provided by the present invention. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. 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.

[0026] The implementation of the present invention is described in detail below with reference to specific embodiments.

[0027] The same or similar numbers in the drawings of this embodiment correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", etc. indicate the orientation or position relationship, they are based on the orientation or position relationship shown in the drawings. This is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0028] Reference Figure 1-4 The figure shows a preferred embodiment of the present invention.

[0029] A high-efficiency LED light source includes a substrate 100, which is provided with a light-emitting area 102. The light-emitting area 102 is provided with multiple light-emitting chips 300 arranged at intervals. The light-emitting chip 300 is in a cube shape, and the top of the light-emitting chip 300 has a top light-emitting surface, the periphery of the light-emitting chip 300 has multiple side light-emitting surfaces, and the bottom of the light-emitting chip 300 has a bottom surface, which is fixed to the bottom of the light-emitting area 102.

[0030] There is a side gap 103 between the side light-emitting surfaces of adjacent light-emitting chips 300, and the side gap 103 is provided with a plurality of spaced-apart frustum columns 400, and there is a column gap between adjacent frustum columns 400; the outer periphery of the frustum column 400 is coated with a reflective adhesive layer 401, and the reflective adhesive layer 401 is arranged around the circumference of the frustum column 400, and along the bottom-up direction of the frustum column 400, the reflective adhesive layer 401 is arranged obliquely away from the side light-emitting surface.

[0031] The light-emitting area 102 is filled with a fluorescent glue layer 200, which covers multiple light-emitting chips 300 and multiple frustum columns 400. The light emitted from the top light-emitting surface is irradiated outward through the fluorescent glue layer 200, and the light emitted from the side light-emitting surface is reflected by the reflective glue layer 401 and irradiated outward through the fluorescent glue layer 200.

[0032] In the high-light-efficiency LED light source provided above, the light emitted from the top light-emitting surface of the light-emitting chip 300 directly passes through the fluorescent adhesive layer 200 to irradiate outward, and the light emitted from the side light-emitting surface irradiates the reflective adhesive layer 401 of the multiple frustum columns 400. After being reflected by the reflective adhesive layer 401, it is irradiated outward through the fluorescent adhesive layer 200, which greatly improves the light efficiency of the LED light source; secondly, multiple frustum columns 400 are provided in the side intervals 103, which can reflect the light emitted from the side light-emitting surface over a large range, and there are column intervals between the frustum columns 400, which can realize multiple reflections of the light between the column intervals, etc., thereby realizing diversified reflection of the light and greatly improving the light efficiency of the LED light source.

[0033] In this embodiment, the top of the fluorescent adhesive layer 200 has a top surface 202 , and the top surface 202 is arranged to be arched upward, so that the top surface 202 can focus the light irradiated outward.

[0034] In this embodiment, a flat disc-shaped disk surface 201 is formed in the middle of the top surface 202. By forming the disk surface 201 on the top surface 202, the focusing range can be limited to achieve better focusing effect.

[0035] In this embodiment, the top of the substrate 100 is recessed to form the aforementioned light-emitting area 102, and the bottom surface of the light-emitting chip 300 is fixedly docked to the bottom of the light-emitting area 102. Alternatively, a dam may be provided on the substrate 100 to surround the light-emitting area 102.

[0036] In this embodiment, the periphery of the light-emitting area 102 has a surrounding peripheral wall 104, which is arranged around the periphery of the light-emitting area 102. There is a peripheral gap between the peripheral wall 104 and the side light-emitting surface, and the peripheral gap is arranged around the periphery of the light-emitting area 102.

[0037] In this way, after a portion of the light emitted from the side light emitting surface irradiates the outer peripheral wall 104 , it can be reflected by the outer peripheral wall 104 and then irradiate outward through the fluorescent adhesive layer 200 .

[0038] In this embodiment, the peripheral wall 104 is arranged to be tilted outward from the light-emitting area 102 from bottom to top, and the light emitted from the side light-emitting surface is reflected by the peripheral wall 104 and then irradiated outward through the fluorescent glue layer 200.

[0039] Arranging the outer peripheral wall 104 at an angle can achieve reflection of light by the outer peripheral wall 104 , thereby improving the reflection performance of the LED light source and improving the light efficiency of the LED light source.

[0040] In this embodiment, a central hole is provided in the frustum column 400, which passes through the frustum column 400 from top to bottom. The bottom of the frustum column 400 is connected to the bottom of the light-emitting area 102. The bottom of the central hole is closed, and the top of the central hole forms a top opening.

[0041] The top of the reflective adhesive layer 401 extends into the middle hole through the top opening to form an inner hole section 403. The lower part of the inner hole section 403 fills the lower part of the middle hole, and the upper part of the inner hole section 403 fills the upper part of the middle hole, and surrounds to form a hollow section 402. The fluorescent adhesive layer 200 fills the hollow section 402 and is combined with the reflective adhesive layer 401 as a whole.

[0042] Thus, by forming a central hole and extending the reflective adhesive layer 401 into the central hole to form an in-hole segment 403, the reflective adhesive layer 401 and the frustum 400 are integrated. Furthermore, the fluorescent adhesive layer 200 extends into the hollow section 402 of the in-hole segment 403, integrating with the reflective adhesive layer 401. Furthermore, by forming the in-hole segment 403 within the central hole and embedding the fluorescent adhesive layer 200 within the central hole, a portion of the light entering the central hole can achieve a diversified reflection effect.

[0043] In this embodiment, the reflective adhesive layer 401 extends to the lower portion of the column spacer, forming a reflective wall segment 404. The upper portion of the column spacer forms an upper region. The fluorescent adhesive layer 200 fills the upper region and is integrated with the reflective wall segment 404. In this way, the reflective wall segment 404 can reflect light emitted from the side luminous surface.

[0044] In this embodiment, both sides of the reflective wall segment 404 have side walls facing the side light-emitting surface. Along the direction from bottom to top of the side walls, the side walls are arranged obliquely away from the side light-emitting surface. The light emitted by the side light-emitting surface is reflected by the side walls and then irradiated outward through the fluorescent glue layer 200.

[0045] It is arranged in an inclined shape toward the side wall, so that the light irradiated toward the side wall can be reflected, thereby improving the reflection performance.

[0046] In this embodiment, an outer dam 101 is provided on the substrate 100, and the outer dam 101 is arranged around the circumference of the light-emitting area 102. There is an annular area between the outer dam 101 and the outer periphery of the light-emitting area 102, and the annular area is arranged around the circumference of the light-emitting area 102; the outer periphery of the fluorescent glue layer 200 covers the annular area and is docked on the outer dam 101.

[0047] In this way, the outer dam 101 can limit the outer periphery of the fluorescent glue layer 200 so that the fluorescent glue layer 200 can be arched to a set height, thereby achieving the fluorescent glue layer 200 focusing effect on light.

[0048] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. High light efficiency LED light source, characterized by: The substrate includes a light-emitting area, the light-emitting area includes a plurality of light-emitting chips arranged at intervals, the light-emitting chips are in a cubic shape, the top of the light-emitting chip has a top light-emitting surface, the periphery of the light-emitting chip has a plurality of side light-emitting surfaces, and the bottom of the light-emitting chip has a bottom surface, and the bottom surface is fixed to the bottom of the light-emitting area; There is a side spacer between the side light-emitting surfaces of adjacent light-emitting chips, and the side spacer is provided with a plurality of spaced-apart frustum columns, with column spacers between adjacent frustum columns; the outer periphery of the frustum columns is coated with a reflective adhesive layer, the reflective adhesive layer is arranged around the circumference of the frustum columns, and is arranged obliquely away from the side light-emitting surface along the frustum columns from bottom to top; The light-emitting area is filled with a fluorescent adhesive layer, which covers a plurality of light-emitting chips and a plurality of frustum columns. The light emitted by the top light-emitting surface is irradiated outward through the fluorescent adhesive layer, and the light emitted by the side light-emitting surface is reflected by the reflective adhesive layer and then irradiated outward through the fluorescent adhesive layer. The frustum column is provided with a central hole running through it from top to bottom, the bottom of the frustum column is docked with the bottom of the light-emitting area, the bottom of the central hole is closed, and the top of the central hole forms a top opening; The top of the reflective adhesive layer extends into the middle hole through the top opening to form an inner-hole section. The lower part of the inner-hole section fills the lower part of the middle hole, and the upper part of the inner-hole section fills the upper part of the middle hole, and surrounds to form a hollow section. The fluorescent adhesive layer fills the hollow section and is integrated with the reflective adhesive layer.

2. The high-light-efficiency LED light source according to claim 1, wherein: The top of the fluorescent glue layer has a top surface, and the top surface is arched upward.

3. The high-light-efficiency LED light source according to claim 2, wherein: The middle portion of the top surface forms a flat disc-shaped disc surface.

4. The high-light-efficiency LED light source according to any one of claims 1 to 3, wherein: The top of the substrate is recessed to form the light-emitting area, and the bottom surface of the light-emitting chip is fixedly docked with the bottom of the light-emitting area.

5. The high-light-efficiency LED light source according to claim 4, wherein: The periphery of the light emitting area has a peripheral wall arranged around it, and the peripheral wall is arranged around the periphery of the light emitting area. There is a peripheral gap between the peripheral wall and the side light emitting surface, and the peripheral gap is arranged around the periphery of the light emitting area.

6. The high-light-efficiency LED light source according to claim 5, wherein: Along the direction from bottom to top of the light-emitting area, the peripheral wall is arranged outwardly away from the light-emitting area, and the light emitted by the side light-emitting surface is reflected by the peripheral wall and then irradiated outward through the fluorescent glue layer.

7. The high-light-efficiency LED light source according to any one of claims 1 to 3, wherein: The reflective adhesive layer extends to the lower part of the column spacer to form a reflective wall segment. The upper part of the column spacer forms an upper area. The fluorescent adhesive layer fills the upper area and is integrated with the reflective wall segment.

8. The high-light-efficiency LED light source according to claim 7, wherein: Both sides of the reflective wall segment have facing side walls facing the side luminous surface. From bottom to top along the facing side walls, the facing side walls are arranged obliquely away from the side luminous surface. The light emitted by the side luminous surface is reflected by the facing side walls and then irradiated outward through the fluorescent glue layer.

9. The high-light-efficiency LED light source according to any one of claims 1 to 3, characterized in that: The substrate is provided with an outer dam, which is arranged around the circumference of the light-emitting area. There is an annular area between the outer dam and the outer periphery of the light-emitting area, which is arranged around the circumference of the light-emitting area. The outer periphery of the fluorescent glue layer covers the annular area and is docked on the outer dam.

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