Summary of the invention
Main purpose of the present invention is to provide a kind of light fixture and full optic angle LED bulb thereof, on the basis that keeps bulb traditional profile elegant in appearance, realizes the full optic angle uniform light distribution of bulb with lower cost.
For realizing above purpose; The present invention proposes a kind of full optic angle LED bulb; Comprise cell-shell and be placed in that LED in the cell-shell is heat sink, LED lamp group and radiator, said LED is heat sink to be in and to be wholely set near the position on cell-shell top and with radiator or to be fixed in the radiator end, said LED lamp group is fixed in the LED heat sink surface; Said LED lamp group comprises forward lamp group and side direction lamp group; Said forward lamp is mounted on the heat sink end face of said LED, and said side direction lamp is mounted on the heat sink side of said LED, and the heat sink side of said LED becomes 30 ° ~ 60 ° angle with horizontal plane.
Preferably, said angle is 45 °.
Preferably, the heat sink symmetry of said LED be provided with 4 sides, the LED lamp quantity of the side direction lamp group on each side equates with the LED lamp quantity of forward lamp group.
Preferably, said radiator is provided with some grooves.
Preferably, said groove vertically runs through along said radiator, and some grooves are cut apart the some heat radiation lobes of formation with said radiator.
Preferably, said heat radiation lobe is provided with through hole.
Preferably, said through hole vertically runs through along said heat radiation lobe.
Preferably, the number of said groove equates with the heat sink side number of said LED.
The present invention proposes a kind of light fixture simultaneously, and this light fixture comprises a full optic angle LED bulb, and said full optic angle LED bulb is above each described full optic angle LED bulb.
A kind of light fixture provided by the present invention and full optic angle LED bulb thereof; Because the side direction lamp group that in this full optic angle LED bulb, is provided with forward lamp group and becomes 30 ° ~ 60 ° of angles with horizontal plane; Make the forward and the side direction of bulb that uniform light source all arranged; Thereby on the basis that keeps LED bulb traditional profile elegant in appearance, realized the full optic angle uniform light distribution of LED bulb with lower cost.Simultaneously, owing on the radiator of full optic angle LED bulb, be provided with groove, heat radiation lobe and through hole, make its radiating efficiency be greatly improved.
The specific embodiment
Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
Referring to Fig. 1, full optic angle LED bulb one embodiment of the present invention is proposed.Fig. 1 is the partial sectional view of full optic angle LED bulb one embodiment of the present invention.The full optic angle LED bulb of present embodiment; Comprise cell-shell 100 and be placed in that LED in the cell-shell 100 is heat sink 200, LED lamp group and radiator 300; Said LED is heat sink 200 to be in and to be wholely set near the position on cell-shell 100 tops and with radiator 300 or to be fixed in radiator 300 ends; Present embodiment preferred heat sink 200 and radiator 300 are wholely set, so that its heat conduction efficiency is higher, radiating rate is faster.Said LED lamp group is fixed in heat sink 200 surfaces of LED; LED lamp group comprises forward lamp group 210 and side direction lamp group 220; Said forward lamp group 210 is located at heat sink 200 end faces of said LED; Said side direction lamp group 220 is located at heat sink 200 sides of said LED, and said LED is heat sink, and 200 sides become 30 ° ~ 60 ° angle with horizontal plane.Because the lighting angle of LED lamp is 120 °, forward lamp group 210 is mainly carried out luminous intensity distribution on 0 ° ~ 60 ° directions of γ in the c-of light distribution γ coordinate system, and the luminous intensity distribution on 60 ° ~ 180 ° directions of γ is then realized by the light source of side direction lamp group 220.Under perfect condition, the light-emitting area of side direction lamp group 220 (also being the side of LED heat sink 200) should be 60 ° with the angle theta of horizontal plane.But; Because the bulb outside is covered with the cell-shell 100 with diffusion, 90 ° of the most of deflection of its shape γ will be so it will change the original light emission direction of LED lamp; Make it to shift to 90 ° of directions of γ, finally cause the luminous uniformity of whole bulb not enough from 120 ° of directions of γ.And if θ is too small, then light direction will be partial to 180 ° of γ, make more light be mapped on the working of plastics that is positioned at lamp holder, thereby reduce light efficiency.Therefore θ should select from 30 ° ~ 60 °.Find that through practice optimum angle theta should be 45 °.Therefore, present embodiment has been realized the full optic angle uniform light distribution of LED bulb with lower cost on the basis that keeps LED bulb traditional profile elegant in appearance.
Further, in order further to improve the luminous uniformity in the full optic angle scope, 200 symmetries that the LED in the foregoing description is heat sink be provided with 4 sides, the LED lamp quantity of the side direction lamp group 220 on each side equates with the LED lamp quantity of forward lamp group 210.In the present industry standard, requiring the strictest to full optic angle bulb is the characteristics of luminescence requirement of Energy Star (Energy Star is hereinafter to be referred as ES) for category-A bulb (being the bulb of standard incandescent lamp shape).It requires light intensity in 0 °-135 ° of the γ to change can not to surpass 20% of average intensity in this scope, and the luminous flux in 135 ° ~ 180 ° of the γ can not be lower than 5% of total light flux.In order further to improve the luminous uniformity in the full optic angle scope, just need make that the corresponding solid angle ratio of luminous ratio and this direction of all directions is identical.Omnidirectional solid angle is 4 π, and solid angle Ω=2 π (1-cos γ) of 0 ° ~ 60 ° of in-scopes of forward lamp group 210 light emission direction γ=2 π (1-cos60 °)=π, so the ratio of the luminous flux of its bright dipping and the luminous flux of side direction lamp group 220 bright dippings is 1:3.But because the structural limitations of lamp holder direction, side direction lamp group 220 can not contribute at the light of 180 ° of γ ~ 225 ° of scopes, so the luminous flux of side direction lamp group 220 is required to be 3 times of luminous flux of forward lamp group 210.
LED is roughly Lambertian source, so the light distribution of forward LED lamp group 210 is I
γ=I
γ=0 °Cos γ.Two-dimentional endless belt luminous flux is considered in cross section to cross axis, can be expressed as
For angle theta is 45 ° side direction LED lamp group 220, and its light intensity then is I '
γ=I '
γ=135 °Cos (γ-135 °), the luminous flux in the cross section
And after the consideration structural limitations, its effective luminous flux does
Therefore, the light flux ratio according to top forward that provides and side direction bright dipping should have
Therefore I is arranged
γ=0 °: I '
γ=135 °≈ 1:3.5.So when the LED lamp that uses when side direction lamp group 220 and forward lamp group 210 was identical, then the quantity of LED lamp should be 3.5 times of LED lamp quantity in the forward lamp group 210 in all side direction LED lamp groups 220.
For the facility that connects between power supply output and the LED; Side direction lamp group 220 should have the N group; Be that LED heat sink 200 should have N symmetrically arranged side, and the LED lamp quantity of the side direction lamp group 220 on LED heat sink 200 each side should equate with the LED lamp quantity of forward lamp group 210.According to top result, N should be 3 or 4, but owing to consider the influence of cell-shell, needs to select bigger value, so preferential side is 4 groups to the lamp group, and promptly LED heat sink 200 has 4 sides.On cover, after the cell-shell, the distribution curve flux of whole lamp is simulated, its analog result is as shown in Figure 2.Visible from analog result, in 0 ° ~ 135 ° of γ the distribution of light intensity very evenly, light intensity change only have an appointment ± 10 °.Therefore, present embodiment has satisfied the uniformity requirement of ES fully, has realized the uniformly light-emitting in the full optic angle scope of LED bulb.
Referring to Fig. 3, Fig. 4, radiator 300 1 embodiment of full optic angle LED bulb of the present invention are proposed.Wherein, Fig. 3 is the structural representation of radiator one embodiment of full optic angle LED bulb of the present invention; Fig. 4 is another structural representation of radiator one embodiment of full optic angle LED bulb of the present invention.The radiator 300 of the full optic angle LED bulb of present embodiment is provided with some grooves 310.The purpose that groove 310 is set is in order to enlarge area of dissipation, and heat-dissipating space, every a groove 310 is set, and has just increased groove 310 and the sidewall that radiator 300 forms, and has also promptly increased radiating surface, and groove also provides the heat radiation space simultaneously.Groove can arbitrarily be arranged at any position of heat radiation lobe, also can be Any shape, as long as can enlarge area of dissipation and heat-dissipating space.In order to make area of dissipation and heat-dissipating space reach maximum, the groove of present embodiment 310 is preferred vertically to be run through along said radiator 300, runs through the some grooves 310 in back and just said radiator 300 is cut apart and formed some heat radiation lobes 320.Because each heat radiation lobe 320 the right and left respectively has a groove 310, so each heat radiation lobe 320 also just increased by two bigger radiating surfaces, improved radiating efficiency.The number of groove 310 equates with the side number of LED heat sink 200.Since LED heat sink 200 preferred 4 sides of present embodiment, therefore same preferred 4 grooves 310, and the corresponding groove 310 in each side can be spread the heat of its generation by rapid radiation.
Further, said heat radiation lobe 320 is provided with through hole 321.This through hole 321 helps the circulation of air, strengthens heat loss through convection.Consider bulb in practical application, normally vertically place, the therefore preferred through hole 321 that vertically runs through along said heat radiation lobe.
Referring to Fig. 5, Fig. 5 is the structural representation of full optic angle LED bulb one preferred embodiment of the present invention.Full optic angle LED bulb in the present embodiment, after being provided with groove 310, heat radiation lobe 320 and through hole 321 on its radiator 300, its radiating efficiency is greatly improved.Be the radiating effect of full optic angle LED bulb of the present embodiment of 10W through software simulation light source general power, obtain analog result as shown in Figure 6.This result shows, the full optic angle LED bulb of present embodiment, and the temperature of its LED light emitting source is the highest also has only 84.5 ℃, and general LED junction temperature can be born 125 ℃.Therefore, the radiator 300 of the full optic angle LED bulb of present embodiment has good heat-sinking capability, enough supports powerful design.
The present invention proposes a kind of light fixture simultaneously; This light fixture comprises a full optic angle LED bulb, said full optic angle LED bulb comprise cell-shell and be placed in that LED in the cell-shell is heat sink, LED lamp group and radiator, said LED is heat sink to be in and to be wholely set near the position on cell-shell top and with radiator or to be fixed in the radiator end; Said LED lamp group is fixed in the LED heat sink surface; It is characterized in that said LED lamp group comprises forward lamp group and side direction lamp group, said forward lamp is mounted on the heat sink end face of said LED; Said side direction lamp is mounted on the heat sink side of said LED, and the heat sink side of said LED becomes 30 ° ~ 60 ° angle with horizontal plane.Full optic angle LED bulb described in the present embodiment repeats no more at this for the related full optic angle LED bulb of the foregoing description among the present invention.
Should be understood that; More than be merely the preferred embodiments of the present invention; Can not therefore limit claim of the present invention; Every equivalent structure or equivalent flow process conversion that utilizes specification of the present invention and accompanying drawing content to be done, or directly or indirectly be used in other relevant technical fields, all in like manner be included in the scope of patent protection of the present invention.