WO2013029365A1 - 大角度全向照明led灯 - Google Patents

大角度全向照明led灯 Download PDF

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Publication number
WO2013029365A1
WO2013029365A1 PCT/CN2012/072588 CN2012072588W WO2013029365A1 WO 2013029365 A1 WO2013029365 A1 WO 2013029365A1 CN 2012072588 W CN2012072588 W CN 2012072588W WO 2013029365 A1 WO2013029365 A1 WO 2013029365A1
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WO
WIPO (PCT)
Prior art keywords
reflector
light
led lamp
unit
bulb shell
Prior art date
Application number
PCT/CN2012/072588
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English (en)
French (fr)
Inventor
杨小明
李甫文
Original Assignee
厦门立明光电有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 厦门立明光电有限公司 filed Critical 厦门立明光电有限公司
Priority to US14/235,796 priority Critical patent/US20140153251A1/en
Priority to EP12827347.1A priority patent/EP2752614B1/en
Publication of WO2013029365A1 publication Critical patent/WO2013029365A1/zh

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/20—Light sources comprising attachment means
    • F21K9/23—Retrofit light sources for lighting devices with a single fitting for each light source, e.g. for substitution of incandescent lamps with bayonet or threaded fittings
    • F21K9/232—Retrofit light sources for lighting devices with a single fitting for each light source, e.g. for substitution of incandescent lamps with bayonet or threaded fittings specially adapted for generating an essentially omnidirectional light distribution, e.g. with a glass bulb
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/60—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V13/00—Producing particular characteristics or distribution of the light emitted by means of a combination of elements specified in two or more of main groups F21V1/00 - F21V11/00
    • F21V13/02—Combinations of only two kinds of elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
    • F21V29/71—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks using a combination of separate elements interconnected by heat-conducting means, e.g. with heat pipes or thermally conductive bars between separate heat-sink elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • F21V7/0008—Reflectors for light sources providing for indirect lighting
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • F21V7/0008—Reflectors for light sources providing for indirect lighting
    • F21V7/0016—Reflectors for light sources providing for indirect lighting on lighting devices that also provide for direct lighting, e.g. by means of independent light sources, by splitting of the light beam, by switching between both lighting modes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • F21V7/0058—Reflectors for light sources adapted to cooperate with light sources of shapes different from point-like or linear, e.g. circular light sources
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V3/00—Globes; Bowls; Cover glasses
    • F21V3/02—Globes; Bowls; Cover glasses characterised by the shape
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • F21V7/04—Optical design
    • F21V7/041—Optical design with conical or pyramidal surface
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2103/00—Elongate light sources, e.g. fluorescent tubes
    • F21Y2103/30—Elongate light sources, e.g. fluorescent tubes curved
    • F21Y2103/33—Elongate light sources, e.g. fluorescent tubes curved annular
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
    • Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]

Definitions

  • the invention relates to an LED lighting fixture, in particular to a large angle omnidirectional lighting LED lamp.
  • the light source has the advantages of high luminous efficiency, low heat generation, power saving and long life, so its application is more and more extensive.
  • COB Chip On Board type LED lamp
  • the LED light source is directly fixed to the heat transfer substrate of the LED lamp by COB, and although the heat dissipation efficiency of the LED lamp is improved, since the heat transfer substrate is a flat plate, the illumination angle of the LED lamp is smaller than 180 degrees, so the overall luminous intensity of the LED lamp will be uneven, affecting the lighting effect.
  • the industry usually arranges the light source to a plurality of planes with different angles (such as plane and vertical plane), and uses hemispherical bulbs to make more than 180° light.
  • This method can achieve large-angle illumination in terms of light distribution, but it still has the following defects: 1. It is difficult to achieve uniform brightness on the bulb surface, and there may be dark areas and bright spots on the bulb shell; There is great difficulty in mass production. This is because each light source distribution surface needs to be provided with an aluminum substrate, which increases the workload of the bonding plate; the light source is difficult to automatically solder to the aluminum substrate, which reduces the production efficiency.
  • a large-angle omnidirectional illumination LED lamp comprising a bulb shell and a light emitting unit, the bulb shell covering the light emitting unit, further comprising a reflecting unit, the reflecting unit comprising a reflector, the reflector is fixed on the bulb shell, the reflector has an annular reflective surface, and the reflective surface of the reflector is disposed by the illumination unit for reflecting the light emitted by the illumination unit toward the bottom of the bulb .
  • a large-angle omnidirectional illumination LED lamp comprising a lamp body, a bulb shell and a light-emitting unit, wherein the bulb shell is provided with the light-emitting unit, and the bottom of the bulb shell is fixed At the top of the lamp body, further comprising a reflecting unit disposed in the bulb shell, the reflecting unit comprising a reflector, the reflector being fixed on the base body, the reflector having an annular reflective surface, the reflector The reflective surface should be provided with a light unit for reflecting the light emitted by the light unit toward the bottom of the bulb shell.
  • the present invention provides the reflecting unit of the reflecting unit corresponding to the light emitting unit by providing the reflecting unit inside the bulb shell, and the light emitted by the light emitting unit is directed to the bulb by the annular reflecting surface of the reflecting member.
  • the bottom reflection of the shell enhances the light intensity of the light emitted from the bottom of the bulb shell, so that the large angle omnidirectional illumination LED lamp has the advantage of a large illumination angle.
  • the LED lamp of the present invention has the advantage of being simple in structure.
  • Figure 1 is a perspective assembled view of a first embodiment of a high angle omnidirectional illumination LED lamp of the present invention.
  • FIG. 2 is an exploded perspective view of the high angle omnidirectional illumination LED lamp of FIG. 1.
  • Figure 3 is a cross-sectional view taken along line A-A of Figure 2 .
  • FIG. 4 is an exploded perspective view of a second embodiment of the high angle omnidirectional illumination LED lamp of the present invention.
  • Figure 5 is a perspective assembled view of a third embodiment of the high angle omnidirectional illumination LED lamp of the present invention.
  • Figure 6 is an exploded perspective view of the high angle full illumination LED lamp of Figure 5.
  • Figure 7 is a cross-sectional view taken along line B-B of Figure 5 .
  • the large angle omnidirectional illumination LED lamp 100 mainly includes a base body 10 , a heat transfer substrate 20 , an illumination unit 30 , a bulb shell 40 and a reflection unit 50 .
  • the base body 10 includes a base 12 and a heat sink 14.
  • the heat sink 14 is a conventional fin type heat sink, and its bottom end is fixed to the base block 12.
  • the top end of the heat sink 14 is provided with an annular groove 142.
  • the heat transfer substrate 20 is a disk-like structure disposed on the top of the base body 10, that is, the top end of the heat sink 14.
  • the light emitting unit 30 includes a plurality of LED light sources 32 that surround the center of the heat transfer substrate 20 and are evenly disposed on the top surface of the heat transfer substrate 20.
  • the heat transfer substrate 20 is fixed in the annular groove 142 and thermally connected to the heat sink 14.
  • the bulb shell 40 is a hemispherical shell structure with a bottom end opening, and a light transmissive scattering material is disposed thereon.
  • the light bulb housing 40 covers the light emitting unit 30 and the heat transfer substrate 20, and isolates the light emitting unit 30 and the heat transfer substrate 20 from the outside of the LED lamp 100 to ensure safe and stable operation of the LED lamp 100.
  • the bulb housing 40 includes a lamp cover 42 and a lamp cover 44.
  • the top end of the lamp cover 42 is provided with an opening 422, and the lamp cover 44 has a substantially round shell structure.
  • the lamp cover 44 When assembled, the lamp cover 44 is received in the opening 422, and the bulb case 40 is formed by ultrasonic welding with the lamp cover 42 so that the surface of the bulb case 40 will exhibit a seamless appearance without gaps.
  • the bottom end of the lamp cover 42 that is, the bottom end of the bulb shell 40, is embedded in the annular groove 142 of the heat sink 14, and the heat transfer substrate 20 is received therein.
  • the reflection unit 50 includes a reflector 52 and two connecting rods 54.
  • the reflector 52 is fixedly connected to the bottom surface of the lamp cover 44 of the bulb shell 40 via the two connecting rods 54 such that the reflector 50 is directly above the light emitting unit 30.
  • the reflector 52 is a hollow truncated annular structure, and the outer diameter of the reflector 52 is gradually increased in a direction away from the light emitting unit 30.
  • the inner and outer annular faces of the reflector 52 are defined as a second reflecting surface 524 and a first reflecting surface 522, respectively, and the first reflecting surface 522 faces the light emitting unit 30, and the second reflecting surface 524 faces the top of the bulb shell 40.
  • the outer diameter of the reflector 52 gradually increases in a direction away from the light emitting unit 30; the hollow portion of the reflector 52 forms a through opening 526. Further, the reflector 52 may be connected to the end surface of the heat transfer substrate 20 by a connecting rod.
  • the upwardly emitted light of the light-emitting unit 30 is irradiated to the reflector 52, and the first reflective surface 522 of the reflector 52 reflects the light toward the bottom of the bulb shell 40, so that the bulb shell 40 is
  • the heat transfer substrate 20 still has a strong light intensity below, thereby expanding the light-emitting angle of the LED lamp 100. Since the opening 526 is disposed on the reflector 52, and the outer diameter of the reflector 52 is gradually increased in a direction away from the light emitting unit 30, the second reflecting surface 524 of the reflector 52 directs the light toward the light. The top surface of the bulb shell 40 is reflected. Thus, from the outside, the bulb housing 40 does not exhibit a significant shadow area left by the light being blocked by the reflector 52 when illuminated. Since the light-transmissive material is disposed on the bulb shell 40, the bulb shell 40 can be made more uniform.
  • FIG. 4 illustrates an LED lamp 100a according to a second embodiment of the present invention.
  • the main structure of the LED lamp 100a is the same as that of the first embodiment. The difference is that the top of the heat transfer substrate 20a is provided with a protrusion 22a. The side of the protrusion 22a is coated with a reflective material. The top of the protrusion 22a is provided with an LED light source 34a.
  • the LED light source 34a is located at a plurality of LED light sources. Above 32a.
  • the light emitting unit 30a is also located below the reflecting unit 50 and corresponds to the reflecting unit 50, wherein the LED light source 34a of the light emitting unit 30a is disposed corresponding to the opening 526 of the reflecting unit 50.
  • the light emitted by the LED light source 34a can be irradiated to the top of the bulb shell 40 through the opening 526, so that the LED light source 34a reinforces the light distribution at the top of the bulb shell 40a, thereby completely eliminating the reflection light of the reflecting unit 50 in the bulb.
  • the large-angle omnidirectional illumination LED lamp 100, 100a of the present invention corresponds to the reflector 52 of the reflection unit 50 by disposing the reflection unit 50 inside the bulb shell 40.
  • the light-emitting unit 30 is disposed to reflect the light emitted by the light-emitting unit 30 toward the bottom of the bulb shell 40 by the annular reflecting surface 522 of the reflector 50, thereby enhancing the light intensity of the light emitted from the bottom of the bulb shell 40, so that the large angle is full.
  • the illumination LED lamps 100, 100a have a large illumination angle.
  • the LED lamp 100, 100a of the present invention has the advantage of being simple in structure since it is not required to mount the LED light source on the three-dimensional structure.
  • the reflecting member 52 of the reflecting unit has an annular reflecting surface 522, a through hole is formed in the middle portion thereof, so that the reflecting member 52 does not completely block the light in one direction, so that the light distribution on the entire bulb shell 40 is distributed. Uniform, no shadow on the appearance, avoiding spots and dark areas, and more acceptable to consumers.
  • the LED lamp 100b includes a base body 10b, a heat transfer substrate 20b, a light emitting unit 30b, a bulb case 40b and a reflecting unit 50b, a reflecting plate 60 and a positioning table 70.
  • the main structure of the LED lamp 100b of the fourth embodiment is the same as that of the LED lamp 100 of the first embodiment, and is different in that:
  • the light emitting unit 30b includes 20 LED light sources 32b which are disposed at a uniform interval on the outer periphery of the top surface of the heat transfer substrate 20; the power of each of the LED light sources 32b is 0.3 watt.
  • the bulb shell 40b is an integrally formed hemispherical structure having a light transmissive scattering material on its surface.
  • the reflecting unit 50b includes a substrate 52b, a fixing post 54b, and a reflector 56b, wherein:
  • the surface of the substrate 52b is provided with a reflective material, which is disposed above the heat transfer substrate 20b and under the light-emitting unit 30b.
  • the periphery of the substrate 52b extends upwardly from three spaced-apart fixing posts 54b (due to the viewing angle, The fixing posts 54b are not shown, and the fixing posts 54b fix the reflector 56b to the substrate 52b.
  • the substrate 52b is fixed on the heat transfer substrate 20b, thereby fixing the reflector 56b to the base body 10. Above.
  • the reflector 56b is an annular structure, and a through hole 561 is defined in a middle portion of the reflector 56b.
  • the reflector 56b includes a first annular surface 562b, a second annular surface 564b, and a third annular surface 566b.
  • the first annular surface 562b is located around the through hole 561 of the reflector 56b and its diameter is gradually reduced in a direction away from the light emitting unit 30b (as shown in FIG.
  • the second annular surface 564b is connected to the first The second annular surface 564b is connected to the first annular surface 562b in a 'V' shape, and its diameter gradually increases in a direction away from the light emitting unit 30b; the first annular surface 562b and the outer surface of the annular surface 562b The ratio of the distance between the second ring surface 564b and the height of the bulb shell 40b is 0.05-0.125; the LED light source 32b of the light emitting unit 30b is located at the first ring surface 562b and the second The periphery of the joint of the toroid 564b; the third toroidal surface 566b is connected to the periphery of the second toroidal surface 564b, and the third toroidal surface 566b is gradually increased in diameter in a direction close to the light emitting unit 30b.
  • the reflector 60 is disposed on the heat transfer substrate 20b and corresponds to the second annular surface 564b and the third annular surface 566b of the reflector 56b.
  • the reflector 60 is a disc-like structure adapted to the heat transfer substrate 20b, and is provided with a plurality of through holes 62.
  • the number of the through holes 62 is the same as that of the LED light source 32b, and the size and position thereof are the same as the LED.
  • the light source 32b is adapted such that the LED light source 32b can be exposed on the surface of the flat plate 60 after being disposed on the heat transfer substrate 20b.
  • a positioning table 70 is further disposed in the bulb shell 40b, and the bottom end thereof is thermally connected to the top end of the heat sink 14 to be fixed on the lamp cap body 10.
  • the outer surface of the positioning table 70 is provided with a highly reflective white paint.
  • the heat transfer substrate 20b is provided at the top end of the positioning stage 70. The ratio of the height of the positioning stage 70 to the height of the bulb shell 40b ranges from 0.25 to 0.33.
  • the upwardly emitted light of the light emitting unit 30b is emitted to the reflecting member 56b of the reflecting unit 50b, and the second toroidal surface 564b and the third toroidal surface 566b of the reflecting member 56b reflect the light downward, especially the reflection.
  • the distribution range of the light is increased; and since the bulb shell 40b has light transmission and scattering properties And the white surface of the positioning surface of the positioning table 70, coupled with the scattering effect of the high reflection plate 60, so that the portion of the bulb shell 40b under the reflector 56b will have a strong light intensity; the bulb above the reflector 56b
  • the light intensity of the portion of the shell 40b is achieved by the principle that the first toroid 562b illuminates the light illuminating the light-emitting unit 30b thereon mainly in two directions, and the first direction is downward reflection, so the downwardly reflecting light Reflecting upward from the substrate 52b, illuminating the top of the bulb shell 40b to enhance the light distribution at the top of the bulb shell 40b; the second direction is that the first loop 562b reflects the light impinging thereon obliquely toward the top of the bulb
  • the LED lamp 100b disclosed in the third embodiment of the present invention provides a reflection unit 50b, which mainly includes a reflector 56b, and provides a high reflection disposed under the reflector 56b.
  • the plate 60 and a positioning table 70 are disposed in the bulb case 40b.
  • the second toroidal surface 564b and the third toroidal surface 566b of the reflector 56b, the high-reflection plate 60, the high-scattering positioning table 70 and the light-transmissive bulb shell 40b cooperate with each other to ensure the reflector 56b.
  • the light intensity of the portion of the lower bulb shell 40b is strong, especially the heat distribution substrate 20 still has a strong light distribution, which increases the illumination angle of the LED lamp 100b; the third ring surface 566b of the reflector 56b, the substrate 52b cooperates with the diffusing bulb shell 40b to ensure that the light intensity of the bulb shell 40b portion above the reflector 56b is strong; since the light emitting unit 30b includes a plurality of densely arranged low power LED light sources 32b, the bulb shell The surface light of 40b is evenly distributed.
  • the LED lamp 100b has a large illumination angle of 320°, and the light distribution of the bulb shell 40b is uniform, the light intensity is uniform, and the appearance has no shadow, thereby avoiding spots and dark areas; in addition, due to the positioning table 70 and the radiator 14 is thermally connected, so the heat dissipation area of the LED lamp 100b is large, and the heat dissipation efficiency is higher.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
  • Fastening Of Light Sources Or Lamp Holders (AREA)

Abstract

一种大角度全向照明LED灯(100)，包括灯泡壳(40)和发光单元(30)，灯泡壳(40)罩设发光单元(30)，还包括反射单元(50)，反射单元(50)包括反光件(52)，反光件(52)固定在灯泡壳(40)上，反光件(52)具有环形的反光面，反光件(52)的反光面对应发光单元(30)设置，用于将发光单元(30)发出的光向灯泡壳(40)的底部反射。大角度全向照明LED灯具有结构简单的优点。

Description

大角度全向照明LED灯 技术领域
本发明涉及LED照明灯具，特别是一种大角度全向照明LED灯。
背景技术
LED 光源具有发光效率高、低发热、省电和寿命长的优点，因此其应用越来越广泛。然而，由于LED光源的固体发光特性，其难于像白炽灯那样做到整灯大角度发光照明。特别是COB(Chip On Board)型LED灯，其LED光源采用COB的方式直接固定在LED灯的传热基板，虽然提高了LED灯的散热效率，但是，由于该传热基板为平板，该LED灯的发光角度将小于180度，因此该LED灯的整体发光强度将不均匀，影响了照明效果。
为了实现LED灯的大角度全向照明，业界通常是把光源排布到多个具有不同角度的平面上（如平面和竖直面），并采用过半球泡以让更多超过180°的光线打出，这种方法在配光方面虽然能实现大角度发光，但是仍具有以下缺陷：1.难以实现灯泡壳面上的亮度均匀，并有可能在灯泡壳上出现暗区和亮斑；2.在批量生产上有很大困难，这是因为每个光源分布面都需设铝基板，增加了贴板的工作量；光源很难自动排布地焊接到铝基板上，降低了生产效率。
发明内容
有鉴于此，有必要提供一种结构简单，便于制造的大角度全向照明灯具。
本发明解决其技术问题所采用的技术方案之一为：一种大角度全向照明LED灯，包括灯泡壳和发光单元，该灯泡壳罩设该发光单元，还包括反射单元，该反射单元包括反光件，该反光件固定在该灯泡壳上，该反光件具有环形的反光面，该反光件的反光面对应该发光单元设置，用于将该发光单元发出的光向该灯泡壳的底部反射。
本发明解决其技术问题所采用的技术方案之二为：一种大角度全向照明LED灯，包括灯头体、灯泡壳和发光单元，该灯泡壳罩设该发光单元，该灯泡壳的底部固定在该灯头体的顶端，还包括设于该灯泡壳之内的反射单元，该反射单元包括反光件，该反光件固定在该灯头体上，该反光件具有环形的反光面，该反光件的反光面对应该发光单元设置，用于将该发光单元发出的光向该灯泡壳的底部反射。
与现有技术相比，本发明通过在灯泡壳内部设置该反射单元，将该反射单元的反光件对应该发光单元设置，利用该反光件的环形反光面将该发光单元发出的光向该灯泡壳的底部反射，增强该灯泡壳底部发出的光的光强，使得该大角度全向照明LED灯具有发光角度较大的优点。而且，由于不需要在立体结构上安装LED光源，使得本发明LED灯具有结构简单的优点。
附图说明
图1是本发明大角度全向照明LED灯第一实施例的立体组装图。
图2是图1所示大角度全向照明LED灯的立体分解图。
图3是沿图2中A-A线的剖视图。
图4是本发明大角度全向照明LED灯第二实施例的立体分解图。
图5是本发明大角度全向照明LED灯第三实施例的立体组装图。
图6是图5所示大角度全明照明LED灯的立体分解图。
图7是沿图5中B-B线的剖视图。
具体实施方式
下面结合附图与具体实施方式对本发明作进一步详细描述。
本发明第一实施例的大角度全向照明LED灯100，请参考图1至图3。
请参考图1和图2，该大角度全向照明LED灯100主要包括一灯头体10、一传热基板20、一发光单元30、一灯泡壳40和一反射单元50。
请参考图2和图3，该灯头体10包括灯头座12和散热器14。该散热器14为传统鳍片式散热器，其底端固定在该灯头座12上。该散热器14的顶端设有一环形凹槽142。该传热基板20为一圆片状结构，其设于该灯头体10的顶部，即该散热器14的顶端。该发光单元30包括多个LED光源32，这些LED光源32环绕该传热基板20的中心，并均匀布设于传热基板20的顶面。该传热基板20固定在该环形凹槽142内并热连接该散热器14。
请参考图1至图3，该灯泡壳40为一底端开口的过半球壳结构，其上设有透光散射材料。该灯泡壳40罩设该发光单元30和该传热基板20，将该发光单元30和传热基板20与该LED灯100的外界隔绝开来，以确保该LED灯100安全、稳定地运行。该灯泡壳40包括一灯罩42及一灯盖44。该灯罩42的顶端设有一开口422，该灯盖44大致为圆壳结构。组装时，该灯盖44收容在该开口422内，与该灯罩42通过超声波焊接接合形成该灯泡壳40，因此灯泡壳40表面将呈现无缝隙的光滑外观。该灯罩42的底端，即该灯泡壳40的底端，嵌设于该散热器14的环形凹槽142之内，并将该传热基板20收容于内。
请参考图2及图3，该反射单元50包括一反光件52和两个连接杆54。该反光件52通过该两根连接杆54固定连接该灯泡壳40的灯盖44底面，使得该反光件50位于该发光单元30的正上方。该反光件52为一中空的圆台形环状结构，该反光件52的直径外径在远离该发光单元30的方向上逐渐增大。该反光件52的内外环面分别定义为第二反光面524和第一反光面522，该第一反光面522面向该发光单元30，该第二反光面524面向该灯泡壳40的顶部。该反光件52的外径直径在远离该发光单元30的方向上逐渐增大；该反光件52的中空部形成一贯穿的开口526。另外，该反光件52也可以利用连接杆连接于该传热基板20的端面。
该LED灯100在工作时，该发光单元30向上发出的光照射到该反光件52，该反光件52的第一反光面522将光线朝向该灯泡壳40的底部反射，使得该灯泡壳40在该传热基板20以下仍具有较强的光强，从而扩大该LED灯100的发光角度。由于该反光件52上设有该开口526，且该反光件52的外径在远离该发光单元30的方向上逐渐增大，因此，该反光件52的第二反光面524会将光线向该灯泡壳40的顶面反射。这样，从外部看来，该灯泡壳40在亮灯时就不会出现由于光线被该反光件52阻挡而留下的明显的阴影区域。由于该灯泡壳40上设有透光散射材料，可以使该灯泡壳40出光更加均匀。
请参考图4，其绘示了本发明第二实施例的LED灯100a。该LED灯100a的主要结构与第一实施例的相同。不同之处在于：该传热基板20a的顶部设有一凸柱22a，该凸柱22a的侧面涂覆反射材料，该凸柱22a的顶部设有一LED光源34a，该LED光源34a位于多个LED光源32a上方。该发光单元30a也是位于该反射单元50下方并对应该反射单元50，其中该发光单元30a的LED光源34a对应该反射单元50的开口526设置。该LED光源34a发出的光线能够穿过该开口526照射至灯泡壳40的顶部，因此该LED光源34a补强了灯泡壳40a顶部的光线分布，从而完全消除该反射单元50反射光线而在该灯泡壳40上留下的阴影区域。
综上所述，在第一、二实施例中，本发明大角度全向照明LED灯100、100a通过在该灯泡壳40内部设置该反射单元50，将该反射单元50的反光件52对应该发光单元30设置，利用该反光件50的环形反光面522将该发光单元30发出的光向该灯泡壳40的底部反射，增强该灯泡壳40底部发出的光的光强，使得该大角度全向照明LED灯100、100a具有发光角度较大的优点。而且，与现有技术相比，由于不需要在立体结构上安装LED光源，使得本发明LED灯100、100a具有结构简单的优点。另外，由于该反射单元的反光件52具有环形的反光面522，其中部形成有通孔，使得该反光件52不会在一个方向上完全遮挡住光线，从而使整个灯泡壳40上的光线分布均匀，外观没有阴影，避免了光斑和暗区现象,更易被消费者接受。
请参考图5和图6，其绘示了本发明第三实施例的大角度全向照明LED灯100b。该LED灯100b包括一灯头体10b、一传热基板20b、一发光单元30b、一灯泡壳40b和一反射单元50b、一反射板60和一定位台70。
本第四实施例的LED灯100b的主要结构与第一实施例的LED灯100相同，其不同之处在于：
该发光单元30b包括20个LED光源32b，其以均匀的间隔布设于传热基板20的顶面的外周缘；每个LED光源32b的功率为0.3瓦。
该灯泡壳40b为一体成型的过半球结构，其表面设有透光散射材料。
该反射单元50b包括基板52b、固定柱54b、反光件56b，其中：
该基板52b的表面设有反光材料，其设于该传热基板20b之上并位于发光单元30b之下，该基板52b的周缘向上延伸出三根间隔设置的固定柱54b(由于视图角度的原因，图中未绘示所有固定柱54b)，这些固定柱54b将反光件56b固定于该基板52b上，该基板52b固定在该传热基板20b上，从而将该反光件56b固定于该灯头体10之上。
请参照图6及图7，该反光件56b为一圆环状结构，该反光件56b的中部设有一通孔561。该反光件56b包括第一环面562b、第二环面564b和第三环面566b。该第一环面562b位于该反光件56b的通孔561的周围且其直径在远离该发光单元30b的方向上逐渐缩小（如图7所示）；该第二环面564b连接在该第一环面562b的外围，该第二环面564b与该第一环面562b的截面呈'V'形连接，其直径在远离该发光单元30b的方向上逐渐增大；该第一环面562b与该第二环面564b连接处到该传热基板20的距离与该灯泡壳40b高度之比的范围为0.05-0.125；该发光单元30b的LED光源32b位于该第一环面562b与该第二环面564b连接处的外围；该第三环面566b连接在该第二环面564b的外围，该第三环面566b在靠近该发光单元30b的方向上直径逐渐增大。
请参照图6及图7，该反射板60设于该传热基板20b之上并对应该反光件56b的第二环面564b和第三环面566b。该反射板60为适配传热基板20b的圆片状结构，其上设有多个通孔62，该些通孔62的数量与LED光源32b的相同，并且其大小和位置均与该LED光源32b相适配，使得LED光源32b设置于该传热基板20b后能够露出于该平板60的表面。
该灯泡壳40b内还设有一定位台70，其底端热连接散热器14的顶端，以固定于灯头体10之上。该定位台70的外表面设有高反射白漆。该传热基板20b设于该定位台70的顶端。该定位台70的高度与该灯泡壳40b的高度之比的范围为0.25-0.33。
该LED灯100b工作时，该发光单元30b向上发出的光发射到反射单元50b的反光件56b，该反光件56b的第二环面564b和第三环面566b将光线向下反射，特别是反射至传热基板20之下，由于该第二环面564b和第三环面566b连接后的环面为弯曲环面，因此增大了光线的分布范围；并且由于灯泡壳40b具有透光散射性，以及定位台70的周面具有白漆，再加上高反射板60的散射作用，使得反光件56b之下的灯泡壳40b部分将具有较强的光强；该反光件56b之上的灯泡壳40b部分的光强是通过以下原理实现的：第一环面562b将发光单元30b照射至其上的光线主要向两个方向反射，第一方向为向下反射，因此该向下反射的光线将由基板52b向上反射，照射于灯泡壳40b的顶部，以增强灯泡壳40b顶部的光线分布；第二方向为第一环面562b将照射其上的光线倾斜地向灯泡壳40b的顶部反射，从而保证了反光件56b之上的灯泡壳部分具有较强的光强。
综上所述，本发明第三实施例所揭示的LED灯100b，其提供了一反射单元50b，该反射单元50b主要包括反光件56b；并提供了一设于反光件56b之下的高反射板60和一设于灯泡壳40b内的定位台70。该反光件56b的第二环面564b和第三环面566b、高反射板60、周面具高散射性的定位台70和具透光散射性的灯泡壳40b相互配合，保证了反光件56b之下的灯泡壳40b部分的光强较强，特别是传热基板20之下仍具有较强的光线分布，增大了LED灯100b的发光角度；该反光件56b的第三环面566b、基板52b和具散射性的灯泡壳40b配合，保证了反光件56b之上的灯泡壳40b部分的光强较强；由于其发光单元30b包括多个密集排布的小功率LED光源32b，因此灯泡壳40b的表面光线分布均匀。本LED灯100b的发光角度较大，能达到320°，而且灯泡壳40b整体的光线分布均匀，光强一致，外观没有阴影，避免了光斑和暗区现象；此外，由于定位台70与散热器14热连接，因此本LED灯100b的散热面积较大，散热效率更高。
以上所述仅为本发明的较佳实施例而已，并不用以限制本发明，凡在本发明的精神和原则之内，所做的任何修改、等同替换、改进等，均应包含在本发明保护的范围之内。

Claims (13)

  1. 一种大角度全向照明LED灯，包括灯泡壳和发光单元，该灯泡壳罩设该发光单元，其特征在于：还包括反射单元，该反射单元包括反光件，该反光件固定在该灯泡壳上，该反光件具有环形的反光面，该反光件的反光面对应该发光单元设置，用于将该发光单元发出的光向该灯泡壳的底部反射。
  2. 根据权利要求1所述的大角度全向照明LED灯，其特征在于：该灯泡壳包括灯盖和灯罩，该灯盖与该灯罩接合形成该灯泡壳，该反射单元还包括连接杆，该反光件通过该连接杆与该灯盖连接固定。
  3. 根据权利要求1所述的大角度全向照明LED灯，其特征在于：该发光单元包括多个LED光源，该反光件为中空的圆台形环状结构，该反光面在该反光件的轴向方向上正对该发光单元设置。
  4. 根据权利要求1所述的大角度全向照明LED灯，其特征在于：还包括灯头体，该灯头体的顶部设有传热基板，该发光单元固定在该传热基板的顶部；该灯泡壳的底部固定在该灯头体的顶部，该灯泡壳上设有透光散射材料。
  5. 根据权利要求3所述的大角度全向照明LED灯，其特征在于：还包括设于该传热基板顶部的凸柱，该凸柱的顶部设有LED光源， 该LED光源对应该圆台形反光件底部的开口设置。
  6. 一种大角度全向照明LED灯，包括灯头体、灯泡壳和发光单元，该灯泡壳罩设该发光单元，该灯泡壳的底部固定在该灯头体的顶端，其特征在于：还包括设于该灯泡壳之内的反射单元，该反射单元包括反光件，该反光件固定在该灯头体上，该反光件具有环形的反光面，该反光件的反光面对应该发光单元设置，用于将该发光单元发出的光向该灯泡壳的底部反射。
  7. 根据权利要求6所述的大角度全向照明LED灯，其特征在于：还包括传热基板，该传热基板为圆片状结构，该发光单元包括多个LED光源，所述LED光源间隔设于该传热基板的周缘,该反光件为中部具有通孔的圆环状结构。
  8. 根据权利要求7所述的大角度全向照明LED灯，其特征在于：该反光件的反光面包括第一环面和第二环面，该第一环面位于该反光件的中部且在远离该发光单元的方向上直径逐渐缩小，该第二环面连接在该第一环面的外围，该第二环面与该第一环面的截面呈'V'形连接。
  9. 根据权利要求8所述的大角度全向照明LED灯，其特征在于：该反光件的反光面还包括第三环面，该第三环面连接在该第二环面的外围，该第三环面在接近该发光单元的方向上直径逐渐增大。
  10. 根据权利要求7所述的大角度全向照明LED灯，其特征在于：还包括反射板，该反射板设置在该传热基板上，该反射板对该所述LED光源设有通孔。
  11. 根据权利要求6所述的大角度全向照明LED灯，其特征在于：还包括定位台，该定位台设于该灯头体的顶端，该传热基板固定在该定位台的顶端，该定位台的高度与该灯泡壳的高度之比的范围为0.25-0.33。
  12. 根据权利要求8至11中任一项所述的大角度全向照明LED灯，其特征在于：该第一环面与该第二环面连接处到该传热基板的距离与该灯泡壳高度之比的范围为0.05-0.125。
  13. 根据权利要求6所述的大角度全向照明LED灯，其特征在于：该发光单元包括20个LED光源，每个LED光源的功率为0.3瓦。
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