CN202082812U - Top-sharing non-coaxial multiple-tapered-tangential-plane deep opening LED reflecting shade - Google Patents
Top-sharing non-coaxial multiple-tapered-tangential-plane deep opening LED reflecting shade Download PDFInfo
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- CN202082812U CN202082812U CN2010201658701U CN201020165870U CN202082812U CN 202082812 U CN202082812 U CN 202082812U CN 2010201658701 U CN2010201658701 U CN 2010201658701U CN 201020165870 U CN201020165870 U CN 201020165870U CN 202082812 U CN202082812 U CN 202082812U
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Abstract
The utility model discloses a top-sharing non-coaxial multiple-tapered-tangential-plane deep opening LED reflecting shade. Light distribution is one of the main technical schemes influencing the lighting effect of LED street lamps. A common 1-3w discrete power type LED device light distribution scheme adopts a lens correction method, namely a light distribution lens is clung to the light-out side of the LED device, so as to change light path and realize light distribution, however, the scheme has large light degradation and LED thermal radiation and convection channel are blocked, which are unfavorable for LED radiation. The mirror face reflecting shade with deep cup openings, provided by the utility model is formed by multiple top-sharing non-coaxial tapered-tangential-planes and tangential planes on the same side, and can optimize the discrete power type LED device for light distribution, not only realizing bat-wing type light distribution curves, but also preventing the blockage of the radiation channel of the LED light source device. The utility model has the advantages of high light efficiency, good light distribution curves, no influence to heat radiation, convenience in installation, lower cost, and easiness in popularization.
Description
[technical field]
The present invention relates to a kind of LED reflection shield, be specifically related to a kind of dark rim of a cup LED of different axle many awls tangent plane reflection shield that pushes up altogether.
With the led light source device application when road illuminating lamp designs, one of important step is the luminous intensity distribution technology.The requirement of luminous intensity distribution is derived from actual needs, purpose is to obtain the road lighting optimum efficiency under equal light source condition as far as possible, comprise rationally use up, illumination reasonable distribution, irradiation area rationally cover, and require that illumination is even as far as possible in imitating irradiation area, and reduce dazzle as far as possible, reduce the light pollution of surrounding environment etc., all these requires the street lamp design must be based on the rational technical scheme of luminous intensity distribution.
The illuminating light distribution technical scheme relates to optical knowledge, and led light source luminous intensity distribution technology also relates to some specific (special) requirements relevant with the LED device.Have only general rule to combine with the particularity rule of led light source device with optical knowledge, analyse in depth research and sturdy exploration practice, just might finally obtain meeting the systems technology scheme of led light source in applications such as street lamp, Tunnel Lamp, Square Lamps.Scheme that this ' pushes up dark mouthful of LED reflection shields of the many awls of different axle tangent planes ' altogether one of achievement of exploring that studies for a long period of time just.
[background technology]
The LED illumination is emerging green illumination high-tech industry, and the led light source product has environmental protection, energy-efficient characteristics, has obtained extensively paying attention to both at home and abroad.In recent years, release both at home and abroad constantly various all kinds of LED street lamp products, more than numerous, the moulding of its kind, quantity is huge even, all is not seen before, and many products have obtained successful relatively practical application.At present, LED street lamp series of products have caused gradually that all circles pay attention to, and the domestic and international market has begun to heat up gradually.
Be different from the conventional road lamp light source: high-pressure mercury lamp, high-pressure sodium lamp, HID high-intensity gas discharge lamp, Metal halogen lamp etc., led light source device application are in the street lamp field, and its luminous intensity distribution technology overall plan relatively not only simply but also more complicated.
Say that it is simple, one of major reason is that the led light source device size is compared with its light fixture size, almost can ignore.That is to say, when carrying out optical path analysis, the discrete led light source can be idealized as spot light, no matter its luminous intensity distribution measure is employing lens type or reflective bell-type or haves both at the same time, compared with the much bigger conventional light source of relative size, obviously want much simple and easy: the conventional light source device can't ideal change into spot light on the dimension scale of road lamp, its luminous intensity distribution difficulty can be infered.
Say that it is complicated more, be except optical considerations, must consider that other must not irrespective factor, mainly comprise: the quantity of [1] led light source device and each other on the spatial relation, the totally influence of synthetic light distribution effect of light fixture; [2] the led light source device is to the specific (special) requirements of peripheral working environment: for example ventilation and heat design, guarantee that heat dissipation channel is unimpeded; [3] implement of the assessment of luminous intensity distribution scheme to the overall system influence, and some other specific technical problem etc.
If only depend on simple optics luminous intensity distribution design, even if obtain full marks in the light path design aspect, and it is not that other issue handling that must solve simultaneously is good, or handle relatively goodly at least, then it can be asserted that: the LED road lamp system based on the disappearance scheme can't be by harsh long-time test, finally can only be to come back after a vain attempt, must not become the mainstream technology scheme of real practicality.
The led light source luminous intensity distribution is divided into ranking method and orthosis, and the orthosis luminous intensity distribution that changes the LED light path with device only is discussed here.
Classify according to the device that orthosis luminous intensity distribution scheme is adopted, mainly contain two kinds of lens luminous intensity distribution and reflection shield luminous intensity distributions.
The lens luminous intensity distribution is used very wide, and some car light just uses the lens luminous intensity distribution.The shipping lane navigation light all disposes special Fresnel Lenses.A large amount of searchlights that use, stage illumination, lighting light fixture etc. all use the lens luminous intensity distribution.Realizing required light distribution effect by optical lens, is the technical scheme that the professional and technical personnel at first can expect.At present in many LED street lamps, a great deal of product adopts the lens luminous intensity distribution, the LED street lamp of some manufacturer production wherein, and use the road lighting effect at initial stage quite satisfactory in reality: the hot spot uniformity is considerably beyond conventional road lamp, substantially eliminated the zebra-stripe phenomenon, it is also very effective that dazzle suppresses.
Reflection shield application percentage in the LED street lamp is also not little, and from rough investigation, most light distribution effects are general, and are not fully up to expectations: hot spot distributes unreasonable, and is bright partially under the lamp, still has zebra-stripe, and ' joining ' light effect is not really desirable.
To sum up analyze, as if conclusion is self-evident: lens are better than reflection shield.At present some professional persons also think: solve the rational technique scheme of LED road lamp light distribution problem, non-ly do not belong to based on lens.Its main reason is: compare in road lighting luminous intensity distribution road surface hot spot effect from the present actual various LED street lamps of seeing [1]: the lens application product obviously is dominant; [2] lens material light loss rate only is 7%, and its light transmittance is up to 93% in other words; [3] the design and fabrication technology maturation of lens is easy to produce in batches, and the lens cost is expected to decline to a great extent; [4] lens are convenient to independent installation, also make things convenient for integral installation.
Yet, ignored very important prerequisite in the above-mentioned listed reason, Here it is: the light source of LED road lamp light distribution scheme is LED lighting source rather than other light source.Led light source not only possesses the light source attribute, and it still is a compound semiconductor device, also has the compound semiconductor device attribute.At first should make object clear when attending, how to suit the remedy to the case otherwise talk?
At first, the LED street lamp is new things, its technical scheme will constantly be weeded out the old and bring forth the new in considerable time, the conclusion that on any one timing node of this stage, obtains, all unavoidable limitation, therefore all only can be, and do not have authority as final conclusion as the reference foundation, so profess this moment which kind of technical scheme which is better and which is worse is premature.
Secondly, with regard to material opinion material.Light transmittance reaches 93% lens material and has belonged to superfine product; And reflectorized material superfine product efficient exceeds 5 percentage points: surpass 98%, and efficient is rich above 96% the inexpensive thing of material.On the other hand: general knowledge is told us, optical properties of material can not directly be represented the device optical characteristics based on this material, because non-linear moulding, each part material thickness difference of lens of LED light-distribution lens relative complex, and unavoidable foozle and blemish etc., border conditions such as refractive index, multipath effect are caused in the capital, and great changes will take place, finally will cause the aggravation of device light loss, device synthesis light transmittance will have a greatly reduced quality, so whether the true light transmittance of finished product light-distribution lens can all remain conscientiously to be measured above 80% compared with the material light transmittance.
As for factors such as volume production, cost and installations,, the application scale all will be out of question along with enlarging.But for the coupling of the physical characteristic of LED device own, then must especially emphasize, ignore this point and will make a serious mistake.
Must consider, more will resolve the heat radiation difficult problem of LED device, this is the specific question that is different from fully in the design of conventional light source device application, is one of vital problem of LED application product design aspect.Radiating treatment is bad, and the led light source device will be by self-heating and ' burning to death '.
Well-known heat propagation three approach: [1] radiation; [2] convection current; [3] conduction.When the LED Design of Luminaires, at first to consider the radiating and cooling requirement of light source led device.Adopt correction-type luminous intensity distribution scheme, the luminous intensity distribution device that puts on the led light source device obviously can have a direct impact the LED radiating effect, especially relates to [1] radiation; [2] convection current approach.
First talk about to add to the led light source device and join lens, owing near its surface, then blocked convection channel immediately, also blocked radiation channel simultaneously, this is fairly obvious obstacle to the heat dissipation channel of LED device except that the PCB conduction path of bottom.Under the approaching situation of the critical upper limit of LED device operating temperature, all necessary careful usefulness of any measure that may cause radiating effect deterioration, heat accumulation, LED junction temperature to rise even forbidding, otherwise will become the last straw that overwhelms camel as drinking poison to quench thirst!
Join reflection shield besides add for the led light source device,, do not have this path of total blockage though limited to circulation flow path; Influence to radiation is then very little, almost can ignore.So the reflection shield scheme obviously is better than lens in LED heat radiation aspect requiring.
Two kinds of technical schemes are analyzed using ' fraud ' that may bring at the led light source luminous intensity distribution above, weep out the corrupt practice and start the good and be the task of top priority, since the fraud of lens thermal resistance is difficult to overcome, then should find new outlets aspect the optimal design of reflection shield luminous intensity distribution performance.If design the reflection shield of the light distribution effect of can realizing ideal, then can reach the special effect of double gain: compare with lens on the one hand, the system synthesis light efficiency can improve more than 20%, and only this point is just precious; On the other hand, the thermal resistance factor that reflection shield is introduced is far below lens device, and equivalent radiating effect is better than lens arrangement greatly, so only need dispose rationally, just can never provide the last straw that overwhelms camel tired out.
[summary of the invention]
The technical problem to be solved in the present invention provides that a kind of reasonable in design, simple, the in light weight cost of manufacturing process are low, the led light source reflection shield of excellent performance, in order to LED street lamp, Tunnel Lamp, the supporting application of Square Lamp to be provided, realize optimization to correction-type LED lighting source luminous intensity distribution technical scheme.
For addressing the above problem, the technical scheme that the present invention takes is: a kind of dark mouthful of LED reflection shield of the many awls of different axle tangent plane that push up altogether.
For making full use of the light that the led light source device sends, must improve and project the flux ratio of answering irradiation area, just will reduce the projection to inactive area, this point just in time also meets the requirement that reduces dazzle and reduce light pollution, and its essence is exactly: control light-emitting 3 D angular region and sensing well.This light shield rim of a cup degree of depth of will negating must be greater than the diameter greater than the led light source device, promptly so-called ' dark rim of a cup '.As on earth how dark? should determine that for single power-type LED type of 1～3W device commonly used, the rim of a cup degree of depth should be not less than 15mm according to LED device actual size.
Because the special applications function of street lamp, requiring single head street lamp ideal illumination spot is rectangle, and then finally can interconnect with adjacent street lamp hot spot, constitutes the even banded irradiation area of movement on roads direction.Concerning the single head street lamp, the long axis of its desirable hot spot is to be the center under the lamp holder, and launch movement on roads direction both sides, and total effective length slightly surpasses two lamp stand spacings; Its desirable minor axis should just cover whole piece and have a lot of social connections, and suitably takes greenery patches outside pavement and the road into account; Illumination should be tried one's best evenly in the irradiation area.In fact, strict realize that Utopian like this requirement is impossible, but approximate realization might be done still and obtains.
With the led light source point is the emission initial point, and light is assigned in some different solid angles of pointing to, and makes these solid angles and road surface cut surface meet the light spot shape of above-mentioned desirable street lamp as far as possible.Reflection shield is designed to ' push up altogether different axle many conical surfaces ' shape, the preferred conical surface is a taper seat, also can be the polygonal pyramid face for this reason, for example rectangular pyramid, hexagonal pyramid etc., and it is oriented to its central shaft indication, its initial point or claim that the summit is the luminous point of led light source device.
A kind of dark mouthful of LED reflection shield of the many awls of different axle tangent plane that push up altogether, it is characterized in that: reflective surface is made of a plurality of sensings different conical surface and tangent with it plane.
A kind of dark mouthful of LED reflection shield of the many awls of different axle tangent plane that push up altogether is characterized in that; The common summit of a plurality of conical surfaces is positioned on each conical surface central shaft, and is the initial point of each conical surface central shaft ray.As variation, it is characterized in that: the common summit of a plurality of conical surfaces is positioned on each conical surface central shaft, but is not the initial point of conical surface central shaft ray entirely.
For improving the hot spot uniformity, the part that overlaps between the conical surface of garden is with the tangent plane finishing of the conical surface that links to each other.The curved surface of finishing formation is exactly the conical surface and synthetic ' the awl tangent plane ' of tangent plane like this, has both optimized the hot spot uniformity, has also simplified the cost of reflective rim of a cup Machining of Curved Surface simultaneously.According to such adjustment,, just become ' bipyramid face ' rather than many conical surfaces for single pearl reflector, technology realizes much easier.
Adopt 1～3W power-type LED device, the LED street lamp of formation is wanted the many LED lamp pearls of usage quantity, and this needs to take all factors into consideration on the luminous intensity distribution technical scheme, and the unified planning overall coordination is realized best general effect by linear superposition theorem.
The LED lamp pearl layout of general many pearls LED street lamp adopts the two-way array formula to arrange through regular meeting: vertical how many row, horizontal how many rows.Be example with 80 pearl LED street lamps now, arrange according to 4 pearls one: 4 LED lamp bead welds are connected on the strip aluminium alloy PCB substrate, are called ' light source bar '; With 20 such light source bar orders side by side, form 4 * 20 led light source matrix again.
For guaranteeing light distribution effect, also effectively simplified design and technology should be unified luminous intensity distribution at 4 pearly-lustre source bars simultaneously, make 4 pearly-lustre source bars special use reflection shields, are called 4 reflection shield bars like a chain of pearls or a string of beads.20 covers 4 like a chain of pearls or a string of beads light source bar and 4 like a chain of pearls or a string of beads the reflection shield bar match, can realize very desirable light distribution effect: realize the approximate rectangular hot spot in road surface.The major and minor axis ratio can be set in advance, and the hot spot uniformity is fine, and in effective hot spot, light is better than 4: 1, particularly adopts ' watershed ' scheme, can also obtain more obvious spectrophotometric result.The watershed is meant the vertical centre axial plane at the both sides tangent plane, and recurrence one reverse taper tangent plane can be with the light of direct projection to this face, and fixed direction allocation is to both sides, reinforcement to the both sides luminous intensity distribution, weaken effect bright under the lamp.
[description of drawings]
Figure 1 shows that the twin shaft circular cone reflection shield sketch that a single LED lamp pearl is designed, symbol 1 is pointed out two reflective taper seats among the figure, and 2 point out the central shaft of two taper seats, and 3 point out the summit of two taper seats, also are the intersection points of two conical surface central shafts.As ray, this point is exactly the total initial point of two rays the central shaft of two circular cones.Under situation about having, need when luminous intensity distribution, the bright spot of hot spot be broken up, to obtain the better uniformity, this is a segment distance can be moved along oneself central shaft in the summit of certain conical surface, leave total summit, so just can adjust local light, better luminous intensity distribution.
Figure 2 shows that single pearl twin shaft awl tangent plane reflection shield stereogram, 4 point out the reflective surface that constitutes with two taper seat tangent plane.Further reduce the illumination at spot center position if desired, can be in the both sides, center method plane of both sides tangent plane, the reverse stupefied conical surface that recurs is assigned to both sides to the light that shines the middle part, just as the effect in watershed.
Figure 3 shows that dark mouthful of LED reflection shield bar of eight circular cone tangent planes of ' four pearls that true die sinking is made ' side-looking positive and negative stereogram.As can be seen from the figure: the adjacent reflection shield wall intersection that partially overlaps, all to be deleted to top from cross spider, light distribution effect has been optimized in such technical finesse, makes moulding more reasonable more attractive in appearance.
Fig. 4 is dark mouthful of LED reflection shield of eight circular cone tangent planes of ' four pearls bars ' implement the package deal figure of die sinking, be marked with the size of indicating, strictly implement by size, can leave high-quality mould, cast out the reflection shield bar of high-quality.
A kind of dark mouthful of LED reflection shields of different many awl tangent planes that push up altogether is characterized in that: the reflection shield bar or the reflection shield module that become a plurality of LED lamp pearls uses based on single led lamp pearl reflection shield permutation and combination.Simultaneously, a kind of dark mouthful of LED reflection shield of the many awls of different axle tangent plane that push up altogether, it is characterized in that: reflection shield bar or reflection shield module that a plurality of LED lamp pearls are used, the central shaft that constitutes a plurality of cones of its reflective surface points to has identical angle, to satisfy light distribution requirements.In addition, a kind of dark mouthful of LED reflection shield of the many awls of different axle tangent plane that push up altogether, it is characterized in that: reflection shield bar or reflection shield module that a plurality of LED lamp pearls are used, the central shaft that constitutes a plurality of cones of its reflective surface points to has different angles, to satisfy light distribution requirements.At last, a kind of dark mouthful of LED reflection shields of the many awls of different axle tangent planes that push up altogether is characterized in that: reflection shield bar or reflection shield module that a plurality of LED lamp pearls are used, the adjacent cells spacing near the time, juxtaposition is partly deleted, the border after the deletion must be carried out round edge and be handled.
[specific embodiment]
Embodiment one, single pearl push up the dark rim of a cup LED of 40 degree axle clamp angle double cone tangent plane 22mm reflection shield altogether
Present embodiment provides single 1～3WLED lamp pearl luminous intensity distribution as shown in Figure 2, and under effective spot area and batswing tab lens same case, illuminations actually measured on average exceeds lens 30%, and effect is very good.
Embodiment two, the synthetic dark rim of a cup LED of the 40 degree axle clamp angle double cone tangent plane 22mm reflection shield bar that pushes up altogether of 4 pearls
The a complete set of engineering drawing of present embodiment as shown in Figure 4, reflection shield bar side isometric view as shown in Figure 3, mirror finish, reflecting surface refractive index about 98%, actual measurement shows: the LED street lamp of total power consumption 100W, when luminous intensity distribution was realized the batswing tab distribution curve flux, suitable with other LED street lamp of 160W that adopts the lens luminous intensity distribution, energy-saving effect was very obvious.
Embodiment three, 120W 80 pearl LED street lamps
The streetlamp housing of present embodiment adopts ' double-vane is spread the wings ' type aluminium alloy lamp housing, install 20 covers by 4 like a chain of pearls or a string of beads light source aluminium base PCB bar connect the light source cell that dark mouthful of LED reflection shield bar of eight circular cone tangent planes of four pearls formed, be equipped with other parts formation overall system again.Total power consumption 120W, the road surface actual measurement surpasses the LED street lamp that adopts lens arrangement 150W.
Claims (10)
1. one kind is pushed up dark mouthful of LED reflection shield of the many awls of different axle tangent plane altogether, and it is characterized in that: reflective surface is made of a plurality of sensings different conical surface and tangent with it plane.
2. a kind of dark mouthful of LED reflection shield of the many awls of different axle tangent plane that push up altogether according to claim 1, it is characterized in that: the reflective conical surface is a taper seat.
3. a kind of dark mouthful of LED reflection shield of the many awls of different axle tangent plane that push up altogether according to claim 1, it is characterized in that: the reflective conical surface is the polygonal pyramid face.
4. a kind of dark mouthful of LED reflection shield of the many awls of different axle tangent plane that push up altogether according to claim 1, it is characterized in that: single led lamp pearl is no more than 5 with the conical surface quantity of reflection shield.
5. a kind of dark mouthful of LED reflection shield of the many awls of different axle tangent plane that push up altogether according to claim 1, it is characterized in that: the common summit of a plurality of conical surfaces is positioned on each conical surface central shaft, and is the initial point of each conical surface central shaft ray.
6. a kind of dark mouthful of LED reflection shield of the many awls of different axle tangent plane that push up altogether according to claim 1, it is characterized in that: the common summit of a plurality of conical surfaces is positioned on each conical surface central shaft, but is not the initial point of conical surface central shaft ray entirely.
7. a kind of dark mouthful of LED reflection shields of different many awl tangent planes that push up altogether according to claim 1 is characterized in that: the reflection shield bar or the reflection shield module that become a plurality of LED lamp pearls uses based on single led lamp pearl reflection shield permutation and combination.
8. a kind of dark mouthful of LED reflection shield of the many awls of different axle tangent plane that push up altogether according to claim 1, it is characterized in that: reflection shield bar or reflection shield module that a plurality of LED lamp pearls are used, the central shaft that constitutes a plurality of cones of its reflective surface points to has identical angle, to satisfy light distribution requirements.
9. a kind of dark mouthful of LED reflection shield of the many awls of different axle tangent plane that push up altogether according to claim 1, it is characterized in that: reflection shield bar or reflection shield module that a plurality of LED lamp pearls are used, the central shaft that constitutes a plurality of cones of its reflective surface points to has different angles, to satisfy light distribution requirements.
10. a kind of dark mouthful of LED reflection shield of the many awls of different axle tangent plane that push up altogether according to claim 1, it is characterized in that: reflection shield bar or reflection shield module that a plurality of LED lamp pearls are used, when the adjacent cells spacing was close, juxtaposition was partly deleted, and the border after the deletion must be carried out round edge and be handled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201658701U CN202082812U (en) | 2010-04-16 | 2010-04-16 | Top-sharing non-coaxial multiple-tapered-tangential-plane deep opening LED reflecting shade |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201658701U CN202082812U (en) | 2010-04-16 | 2010-04-16 | Top-sharing non-coaxial multiple-tapered-tangential-plane deep opening LED reflecting shade |
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| CN202082812U true CN202082812U (en) | 2011-12-21 |
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| CN2010201658701U Expired - Fee Related CN202082812U (en) | 2010-04-16 | 2010-04-16 | Top-sharing non-coaxial multiple-tapered-tangential-plane deep opening LED reflecting shade |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110073138A (en) * | 2016-12-08 | 2019-07-30 | Lg伊诺特有限公司 | Lighting device and lamps for vehicle including the lighting device |
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2010
- 2010-04-16 CN CN2010201658701U patent/CN202082812U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110073138A (en) * | 2016-12-08 | 2019-07-30 | Lg伊诺特有限公司 | Lighting device and lamps for vehicle including the lighting device |
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Granted publication date: 20111221 Termination date: 20140416 |