CN202109274U

CN202109274U - Yttrium aluminum garnet (YAG) fluorescence light-emitting diode (LED) bulb

Info

Publication number: CN202109274U
Application number: CN2011202074181U
Authority: CN
Inventors: 王凯
Original assignee: HAOLIBEST LIGHTING CO Ltd
Current assignee: HAOLIBEST LIGHTING CO Ltd
Priority date: 2011-06-20
Filing date: 2011-06-20
Publication date: 2012-01-11
Anticipated expiration: 2021-06-20

Abstract

The utility model relates to an yttrium aluminum garnet (YAG) fluorescence light-emitting diode (LED) bulb, which comprises a lamp cover, a lamp head, a radiator, a horizontal heat conduction base plate arranged on the upper end portion of the radiator, an LED light source assembly and driver which can drive the LED light source assembly to shine. The heat conduction base plate is provided with half-pace-shaped heat conduction support, a plurality of LED lamp beads of the LED light source assembly are respectively arranged at the top end and each side wall of the heat conduction support, and accordingly the YAG fluorescence LED bulb is good in heat radiation. The light source can shine from all angles, thereby enlarging the visual angle of the LED bulb. The YAG fluorescence LED bulb also comprises an inner cover covered outside the heat conduction support and the LED bulb. The inner wall of the inner cover is evenly coated with a YAG fluorescence powder layer, and accordingly the YAG fluorescence LED bulb can effectively convert uneven blue light and near ultraviolet light transmitted by the LED lamp bead into a soft light source evenly scattering. Finally, white light with even light distribution and good color rendering is obtained.

Description

YAG fluorescence LED bulb lamp

Technical field

The utility model belongs to lighting technical field, is specifically related to a kind of YAG fluorescence LED bulb lamp

Background technology

are research and development, production and the application develop rapidly of LED in recent years, and the invention of high-power blue-light LED chip makes LED be applied to the general lighting field becomes possibility.The inner alloy (InGaN) of this blue-light LED chip because of having indium nitride and gallium nitride; Utilize the optical property of InGaN alloy and can send blue light; But, therefore can not directly be used for illumination owing to contain stronger ultraviolet ray in the light that this blue-light LED chip sends.So people are through the surface-coated one deck yttrium-aluminium-garnet (YAG:Ge at blue-light LED chip ³⁺ ) fluorescent material or at InGaN alloy mixing YAG fluorescent material, the blue-light excited YAG fluorescent material that sends with blue-light LED chip sends gold-tinted, makes blue light and yellow light mix, finally obtains the LED lamp that emits white light.Therefore, no matter be single packaged LED lamp, still combine the LED light group that forms by a plurality of LED lamp pearls, not the spot light (or Lambertian source) on the general physics meaning, but the set of the spot light of a plurality of dispersions.This following problem of being made by blue-light LED chip surface-coated YAG fluorescent material of YAG fluorescence LED bulb lamp ubiquity: 1) under the different distance of myopia field, light distribution is inhomogeneous; 2) owing to only contain indigo plant, yellow two principal spectrums in the luminescent spectrum of white light, have that colour temperature is higher, the colour rendering index problem of lower, make the illuminated object cross-color not meet common lighting requirement; 3) spectrum mixes inhomogeneously in the light that sends of LED bulb lamp, and its color distribution is to change with distance and the different of angle as the curve of light distribution, and especially often there is a blue light center that colour temperature is very high in high-powered LED lamp.In addition, the common LED bulb lamp also exists angle of visibility (general≤120 °) less than normal, the bad problem of thermal diffusivity

Summary of the invention

the utility model technical problem to be solved is to overcome that the YAG fluorescence LED bulb lamp light distribution of prior art is inhomogeneous, colour rendering is bad, angle of visibility is little, the problem of poor radiation, and a kind of improved YAG fluorescence LED bulb lamp is provided.

For solving the problems of the technologies described above, the utility model adopts following technical scheme:

a kind of YAG fluorescence LED bulb lamp; The radiator that comprises lampshade, is fixedly connected with the lower edge of lampshade, the horizontal heat-conducting substrate that is arranged on said radiator upper end, the lamp holder that is connected with said radiator bottom, led light source assembly and can the luminous driver of driving LED light source assembly; Said led light source assembly comprises a plurality of LED lamp pearls; According to the present invention; Said horizontal heat-conducting substrate is provided with halfpace type heat conduction support; A plurality of LED lamp pearls are arranged at respectively on the top and each sidewall of this heat conduction support; And a plurality of LED lamp pearls evenly distribute on the top of this heat conduction support and each sidewall, and said YAG fluorescence LED bulb lamp also comprises and be located at said heat conduction support and led light source assembly inner cover outward, and this inner cover comprises transparent cover and attached to the yttrium aluminium garnet fluorescent powder layer on the transparent cover inwall.

preferably, 1/2 of the distance of said heat conduction support to the distance>=said inner cover of heat-conducting substrate to heat-conducting substrate.

preferably, the material of said heat-conducting substrate and heat conduction support is aluminium, heat-conducting substrate and heat conduction support can be one-body molded, also can divide body formedly, separately make.

in addition, heat conduction support outside also is provided with LGP, LGP mainly plays reflex, it can reflect away the light that LED lamp pearl is sent, and improves light utilization efficiency; LGP preferably is packaged in outside the heat conduction support, extends to from the bottom of heat conduction support around the LED lamp pearl of each sidewall, and around the LED lamp pearl of heat conduction cantilever tip.

Owing to take above technical scheme, the utility model compared with prior art has following advantage:

the utility model has the inner cover of YAG phosphor powder layer through the set inside at lampshade; Led light source assembly and heat conduction support are covered; Make it possible to the uneven spot light that led chip sends is converted into effectively the soft light source of even scattering, obtain finally that light distribution is even, the better white light of colour rendering; Simultaneously through can selecting the excitation wavelength of fluorescent material, and then produce the YAG fluorescence LED bulb lamp that satisfies various colour temperature demands and colour rendering index easily to the adjusting of each component ratio of YAG fluorescent material on the inner cover with to the screening of fluorescent powder grain degree; In addition; The halfpace type heat conduction support that is provided with on the heat-conducting substrate makes the thermal diffusivity of led light source assembly better on the one hand; The LED lamp pearl that is provided with on each sidewall of heat conduction support and the top on the other hand makes light source to send from all angles; Greatly improved the angle of visibility of YAG fluorescence LED bulb lamp, light efficiency is greatly improved.

Description of drawings

Below in conjunction with accompanying drawing and concrete embodiment the utility model is done further detailed explanation:

Fig. 1 is the stereogram of the utility model YAG fluorescence LED bulb lamp;

Fig. 2 is the overall structure sketch map of the utility model YAG fluorescence LED bulb lamp;

Fig. 3 is the split structural representation of the utility model YAG fluorescence LED bulb lamp;

wherein: 1, lampshade; 2, radiator; 3, lamp holder; 4, led light source assembly; 40, LED lamp pearl; 5, heat-conducting substrate; 6, driver; 7, inner cover; 71, transparent cover; 72, YAG phosphor powder layer; 8, heat conduction support; 9, LGP.

The specific embodiment

are done further detailed explanation below in conjunction with concrete embodiment to the utility model, but are not limited to these embodiment.

Embodiment 1

are made up of lampshade 1, radiator 2, lamp holder 3, led light source assembly 4, heat-conducting substrate 5, driver 6, inner cover 7, heat conduction support 8 and LGP 9 according to the YAG fluorescence LED bulb lamp of present embodiment referring to Fig. 1,2 and 3.Wherein, the lower edge of lampshade 1 is fixedly connected with the upper limb of radiator 2, and the lower edge of radiator 2 is fixedly connected with the upper limb of lamp holder 3, and the mode of fixed connection can be bayonet socket, screw thread or gluing connection etc.Usually, radiator 2 is for having the metal of thermal conductive resin, and the top of lamp holder 3 and radiator 2 contacted parts are generally insulating barrier, like plastics (not showing among the figure), and the outer wall of lamp holder 3 and bottom material therefor metal for conducting electricity.In the present embodiment, the outer wall of lamp holder 3 is the conducting metal of screw-type, can certainly be arranged to bayonet type etc., so that join with external power source.Heat-conducting substrate 5 is an aluminum; It is horizontally set on the upper end of radiator 2, is provided with the aluminium heat conduction support 8 of trapezoidal shape on the heat-conducting substrate 5, and led light source assembly 4 comprises five LED lamp pearls 40; They are separately positioned on the top and four sidewalls of heat conduction support 8; And also be provided with LGP 9 outside the heat conduction support 8, LGP 9 extends to around the LED lamp pearl 40 of each sidewall from the bottom of heat conduction support 8, and around the LED lamp pearl 40 on heat conduction support 8 tops.Driver 6 is arranged on radiator 2 inside, and it is luminous that it is used for driving LED light source assembly 4.Inner cover 7 is arranged in the lampshade 1; It is made up of transparent cover 71 and one deck YAG phosphor powder layers 72 of evenly being coated in the transparent cover 71; Inner cover 7 covers led light source assembly 4 and heat conduction support 8, and it can convert the uneven spot light that led light source assembly 4 sends into the soft light source of even scattering effectively.Its LED lamp pearl of common YAG fluorescence LED bulb lamp is set directly on the heat-conducting substrate, and its angle of visibility generally is merely 120 °, and maximum also can only reach 180 °.Present embodiment YAG fluorescence LED bulb lamp is provided with a trapezoidal shape aluminium heat conduction support 8 on heat-conducting substrate 5; LED lamp pearl 40 is arranged on the top and each sidewall of heat conduction support 8; Make light source to send, greatly improved the angle of visibility of YAG fluorescence LED bulb lamp from all angles.For making angle of visibility expand desirable scope to and being convenient to heat radiation, be that horizontal starting point is calculated with heat-conducting substrate 5, the height of heat conduction support 8 should >=inner cover 7 highly 1/2.In addition, settings that be formed in one of heat-conducting substrate in the present embodiment 5 and heat conduction support 8, certainly both also can divide body formed, separately making.

The YAG fluorescence LED bulb lamp of present embodiment adopts the 220V power supply, and combining specific feedback circuit through the AC/DC transformer is that led chip provides the constant-current driving design, and LED lamp pearl 40 can send InGaN blue light and black light; The YAG phosphor powder layer 72 of inner cover 7 adopts nanometer technology to make; Can in transparent cover 71, evenly distribute; Uneven blue light and black light that LED lamp pearl 40 is sent convert soft scattered light to; Simultaneously people can come the selective exitation wavelength through adjusting that each element of YAG fluorescent material is formed with to the screening of fluorescent powder grain degree, and then can produce the YAG fluorescence LED bulb lamp at various colour temperature demands of satisfying of 2500K-7000K colour temperature section and colour rendering index; The design of three-dimensional aluminium heat conduction support 8; Not only solved the heat dissipation problem of LED lamp, especially high-powered LED lamp effectively; The angle of visibility of YAG fluorescence LED bulb lamp is greatly improved, even reach＞270 °, so the luminous efficiency of this YAG fluorescence LED bulb lamp has also obtained improving further.Because good heat dissipation effect through verification experimental verification, extends to＞30000 hours the service life of the YAG fluorescence LED bulb lamp of present embodiment.

More than the utility model has been done detailed description; Its purpose is to let the personage that is familiar with this art can understand the content of the utility model and implements; Can not limit the protection domain of the utility model with this; All equivalences of doing according to the spirit of the utility model change or modify, and all should be encompassed in the protection domain of the utility model

Claims

1. YAG fluorescence LED bulb lamp; Radiator (2), the horizontal heat-conducting substrate (5) that is arranged on said radiator (2) upper end, the lamp holder (3), the led light source assembly (4) that are connected with said radiator (2) bottom that comprises lampshade (1), is fixedly connected with the lower edge of said lampshade (1) and can drive the luminous driver (6) of said led light source assembly (4); Said led light source assembly (4) comprises a plurality of LED lamp pearls (40); It is characterized in that: said horizontal heat-conducting substrate (5) is provided with halfpace type heat conduction support (8); Said a plurality of LED lamp pearls (40) are arranged at respectively on the top and each sidewall of said heat conduction support (8); And said a plurality of LED lamp pearls (40) evenly distribute on the top of said heat conduction support (8) and each sidewall; Said YAG fluorescence LED bulb lamp also comprises and is located at the outer inner cover (7) of said heat conduction support (8) and said led light source assembly (4), and said inner cover (7) comprises transparent cover (71) and attached to the yttrium aluminium garnet fluorescent powder layer (72) on said transparent cover (71) inwall.

2. YAG fluorescence LED bulb lamp according to claim 1 is characterized in that: 1/2 of the distance of said heat conduction support (8) to the distance >=said inner cover (7) of heat-conducting substrate (5) to heat-conducting substrate (5).

3. YAG fluorescence LED bulb lamp according to claim 1 is characterized in that: the material of said heat-conducting substrate (5) and said heat conduction support (8) is aluminium.

4. YAG fluorescence LED bulb lamp according to claim 1 is characterized in that: said heat-conducting substrate (5) and said heat conduction support (8) are formed in one or divide body formed.

5. YAG fluorescence LED bulb lamp according to claim 1 is characterized in that: said heat conduction support (8) outside also is provided with LGP (9).