WO2013131385A1

WO2013131385A1 - Luminous structure and led lamp with same

Info

Publication number: WO2013131385A1
Application number: PCT/CN2012/085539
Authority: WO
Inventors: 赵铱楠; 彭建
Original assignee: 深圳和而泰照明科技有限公司
Priority date: 2012-03-07
Filing date: 2012-11-29
Publication date: 2013-09-12
Also published as: CN102635793A

Abstract

A luminous structure and a LED lamp comprising the luminous structure. The luminous structure comprises a light source (10) and a trumpet-shaped reflecting cavity (20). The light source (10) comprises a cylinder-shaped or a truncated-cone-shaped base (12) and several LEDs (11) distributed around the side of the base (12). An inner wall of the reflecting cavity (20) is a curved reflecting surface (21). The light source (10) is arranged in the reflecting cavity (20) and is located at the bottom of the reflecting cavity (20). The reflecting surface (21) is a paraboloid, and the LEDs (11) are arranged on the focus of the reflecting surface (21) or on a straight line which can produce parallel emergent lights, so that emergent lights with small light-emitting angles can be produced. The luminous structure adopts a side-emitting light source and produces emergent lights after being reflected by the reflecting surface, so that glares can be effectively prevented. In addition, by using multiple LEDs, not only heat can be evenly-distributed, but also LEDs with intermediate power can be selected and used. In one aspect, heat-radiating is facilitated, and in the other aspect, costs can be reduced.

Description

Light-emitting structure and LED lamp thereof

The present invention relates to the field of lighting fixtures, and more particularly to a lighting structure applied to an LED and an LED lamp having the same. Background technique

Due to the rapid development of LED (Light Emitting Diode) technology,

The luminous efficacy of LEDs continues to increase while costs continue to decline. In addition to the gradual establishment of LED standards, LED lighting products are no longer confined to engineering and commercial lighting, but are gradually becoming popular in residential lighting. Among them, LED spotlights are light sources with unidirectional illumination, such as BR, MR, and PAR lamps. According to the ENERGY STAR standard, the MR spotlight needs to be less than 50. , and the PAR type spotlight needs to be less than 65. . LED downlights, ceiling lights, floodlights, etc. are one-way lighting fixtures that are directly integrated with LEDs. Smaller illumination angles are also required in general use.

Existing LED spotlights, downlights, ceiling lights, and floodlights are mostly made up of multiple high-power LE Ds with an all-in-one lens or reflector. However, due to the high price of high-power LE D, the cost of the solution is high and it is not suitable for civilian promotion. In addition, the spotlights realized in this way, because of the appearance of a plurality of holes, have a large difference in appearance from the conventional lamps, and are not easily accepted by the market.

Another newer implementation is achieved by a single integrated LED with a corresponding lens or reflector. Compared to the way of multiple LEDs, the solution, especially the form of the reflector, is more readily accepted by the market in appearance. However, due to the concentrated heat of the integrated LED, the resulting heat buildup will result in poor overall stability. In addition, since the integrated light source has a large light-emitting area, in order to improve the light utilization efficiency, the lens and the reflector need a large height, resulting in the size of the power supply at the upper limit of the structure.

In addition, the integrated LED with the same luminous flux is slightly cheaper than many high-power LEDs, but it still has no significant advantage. In order to improve the cost performance, it is also possible to use a plurality of medium-power LEDs to be laid on the flat panel, and then add a matte or diffusion cover to make the light-emitting surface uniform to prevent the light bead from being seen. However, this method does not achieve a small angle of illumination. Summary of the invention

The main object of the present invention is to provide a unidirectional light output and a small angle of exit light, which is applied to

The LED's light-emitting structure and its LED lights.

The invention provides a light-emitting structure, comprising a light source and a reflective cavity disposed in a flared manner, the light source comprising a base disposed in a cylinder or a circular body and a plurality of LEDs distributed around the side of the base. The inner wall of the reflective cavity is a reflective surface disposed in a curved shape, and the light source is disposed in the reflective cavity and located at a bottom end of the reflective cavity.

Preferably, the reflecting surface is disposed in a paraboloidal shape.

Preferably, the LED is disposed at a focus of the reflecting surface.

Preferably, the base is coaxial with the reflecting surface.

The invention also provides an LED lamp, the LED lamp has a light-emitting structure, the light-emitting structure comprises a light source and a reflective cavity arranged in a shape of a bar, the light source comprises a base provided by a cylinder or a circular body. And a plurality of LEDs distributed around the side of the base, the inner wall of the reflective cavity is a reflective surface disposed in a curved shape, the light source is disposed at the bottom end of the reflective cavity, and the LED lamp further includes the light source A connected power board and a heat sink connected to the power board.

Preferably, the reflecting surface is disposed in a paraboloidal shape.

Preferably, the LED is disposed at a focus of the reflecting surface.

Preferably, the base is coaxial with the reflecting surface.

Preferably, the LED lamp further includes a face cover disposed at the open end of the reflective cavity and a pressure ring for fixing the face cover to the reflective cavity. The light-emitting structure proposed by the invention adopts a light source with side-emitting light, which is reflected by the reflecting surface to generate light, which can effectively prevent glare. The reflecting surface is arranged in a paraboloid, and the LED is disposed on the focal point of the reflecting surface, or is disposed on a straight line capable of generating parallel outgoing light, and can generate an outgoing light with a small luminous angle, which can satisfy the lamps such as BR, MR, and PAR. Demand. The above light source uses a plurality of LEDs, not only the heat distribution is uniform, but also a medium power LED can be selected, which can solve the heat dissipation problem well, solve the technical problem of low product life caused by the heat dissipation problem, and can reduce the cost on the other hand. Improve the cost performance of the product. DRAWINGS

1 is a schematic axial sectional view of a light-emitting structure of the present invention;

2 is a schematic axial sectional view of an LED lamp of the present invention. The implementation, functional features, and advantages of the present invention will be further described in conjunction with the embodiments. detailed description

The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments. It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The invention provides a light-emitting structure, in particular to a light-emitting structure applied to an LED.

Referring to FIG. 1, FIG. 1 is a schematic cross-sectional structural view of a light emitting structure of the present invention.

In this embodiment, a light-emitting structure includes a light source 10 and a reflective cavity 20 disposed in a flared manner. The light source 10 includes a base 12 disposed in a cylindrical or truncated cone shape and a plurality of surrounding bases 12 The lateral distribution of the LEDs 11, the distribution may be a uniform distribution, or may be distributed according to other rules. The inner wall of the reflecting chamber 20 is a reflecting surface 21 provided in a curved shape, and the reflecting surface 21 can emit light emitted from the LED 11 from the open end of the reflecting chamber 20. The light source 20 is disposed at the bottom end of the reflective cavity 20. It can be fixedly connected to the reflective cavity 20 or detachably connected to the reflective cavity 20.

The reflecting surface 21 is preferably provided in a parabolic shape.

The above-mentioned LED 11 is preferably disposed at the focus of the reflecting surface 21 or on a straight line on which parallel outgoing light can be generated.

The susceptor 12 is preferably a hollow cylinder and is coaxial with the reflecting surface 21. The light-emitting structure proposed by the present invention adopts a light source 10 with side-emitting light, which is reflected by the reflecting surface 21 to generate light, which can effectively prevent glare. The reflecting surface 21 is disposed in a paraboloidal manner, and the LED 11 is disposed on the focal point of the reflecting surface 21, or is disposed on a straight line capable of generating parallel outgoing light, and can generate an outgoing light having a small illuminating angle, which can satisfy, for example, BR, MR, PAR. The need for luminaires. The above-mentioned light source 10 uses a plurality of LEDs 11 to not only distribute heat evenly, but also to select a medium-power LED11, which can solve the heat dissipation problem well and solve the problem. On the other hand, it can reduce the cost and improve the cost performance of the product.

The present invention also proposes an LED lamp, specifically an LED lamp having the light-emitting structure of the above embodiment.

Referring to Figure 2, Figure 2 is a schematic cross-sectional view of the axial direction of the L E D lamp of the present invention.

In this embodiment, an LED lamp includes a light-emitting structure, and the light-emitting structure is specifically referred to in the above embodiment, and details are not described herein again. The LED lamp further includes a power board 30, a heat sink 40, a connector 50, a base 60, a cover 70, and a pressure ring 80. The power board 30 is connected to the above-mentioned light source 10 to supply power to the light source. The heat sink 40 is connected to the power source board 30 or the light source 10 and the power board 30 to dissipate heat from the light source 10 and/or the power board 30. The power board 30 is connected to the base 60 via a connector 50. In order to control the cost and weight and safety requirements of the LED lamp, the connector 50 is preferably a plastic piece. The face cover 70 is disposed at the open end of the reflective cavity 20 for protecting the light source 10 and the reflecting surface 21. The outer edge of the circular cover 70 is provided with a pressure ring 80 for fixing the cover 70 to the reflection chamber 20. The pressure ring 80 is a ring body, and its cross section is disposed at a right angle. The right corner edge is used for engaging with the reflection cavity 20, and the corner edge is used for fixing the face cover 70. The cover 70 and the reflective cavity 20 are detachably connected to each other, thereby providing protection and facilitating disassembly and maintenance.

The LED lamp of the present invention provides a large space for the power board 30, and the added heat sink 40 can effectively solve the heat dissipation problem of the LED lamp, thereby avoiding the phenomenon that the product life is low due to the heat dissipation problem. In addition, the appearance of the invention is close to that of the traditional halogen lamp, which conforms to the traditional aesthetic and is more easily accepted by the market. The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the invention, and the equivalent structural changes made by the description of the present invention and the drawings are directly or indirectly applied to other related technical fields. The same is included in the scope of patent protection of the present invention.

Claims

Claim

What is claimed is: 1. A light-emitting structure comprising a light source and a reflective cavity disposed in a flared shape, wherein the light source comprises a base disposed in a cylinder or a circular body and a plurality of sides disposed around the side of the base The LED, the inner wall of the reflective cavity is a reflective surface disposed in a curved shape, and the light source is disposed in the reflective cavity and located at a bottom end of the reflective cavity.

The light emitting structure according to claim 1, wherein the reflecting surface is disposed in a parabolic shape.

The light emitting structure according to claim 2, wherein the LED is provided at a focus of the reflecting surface.

The light emitting structure according to any one of claims 1 to 3, wherein the susceptor is coaxial with the reflecting surface.

An LED lamp, characterized in that the LED lamp has the light-emitting structure according to claim 1, the LED lamp further comprising a power board connected to the light source and a heat sink connected to the power board.

The LED lamp according to claim 5, wherein the reflecting surface is disposed in a parabolic shape.

The LED lamp according to claim 6, wherein the LED is provided on a focal point of the reflecting surface.

The LED lamp according to any one of claims 5 to 7, wherein the susceptor is coaxial with the reflecting surface.

9. The LED lamp of claim 8, further comprising a face cover disposed at the open end of the reflective cavity and a pressure ring for securing the cover to the reflective cavity.