CN102121678B - Designing method of distribution module of LED lamp - Google Patents

Designing method of distribution module of LED lamp Download PDF

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Publication number
CN102121678B
CN102121678B CN2011100083833A CN201110008383A CN102121678B CN 102121678 B CN102121678 B CN 102121678B CN 2011100083833 A CN2011100083833 A CN 2011100083833A CN 201110008383 A CN201110008383 A CN 201110008383A CN 102121678 B CN102121678 B CN 102121678B
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light
led chip
dodging
beam shaping
distribution module
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CN2011100083833A
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CN102121678A (en
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刘伟奇
杨罡
靳宝玉
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ZHUHAI SUNTAC OPTOELECTRONIC CO Ltd
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Priority to CN2011100083833A priority Critical patent/CN102121678B/en
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Priority to PCT/CN2012/070248 priority patent/WO2012095006A1/en
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    • 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
    • F21V13/04—Combinations of only two kinds of elements the elements being reflectors and refractors
    • 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
    • F21V5/00—Refractors for light sources
    • F21V5/04—Refractors for light sources of lens shape
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
    • G02B19/0004—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed
    • G02B19/0028—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed refractive and reflective surfaces, e.g. non-imaging catadioptric systems
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
    • G02B19/0033—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use
    • G02B19/0047—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source
    • G02B19/0061—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source the light source comprising a LED
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/0012—Optical design, e.g. procedures, algorithms, optimisation routines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2131/00—Use or application of lighting devices or systems not provided for in codes F21W2102/00-F21W2121/00
    • F21W2131/10—Outdoor lighting
    • F21W2131/103—Outdoor lighting of streets or roads
    • 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]

Abstract

The invention provides a designing method of a distribution module of an LED lamp. The distribution module comprises a substrate, wherein an LED chip, a beam shaping expander and a beam homogenizing and gathering reflector are encapsulated on the substrate, and the beam shaping expander is provided with an incident surface and an emergent surface which are oppositely arranged. The method comprises the following steps of: determining the positions of the LED chip and the beam homogenizing and gathering reflector, dividing an equiluminous surface formed after light which is emitted by the LED chip passes by the beam homogenizing and gathering reflector into a plurality of grids, and dividing an irradiated road surface into a plurality of grids with the same quantity as the equiluminous surface; determining the maximum light emergent angle of the light which is emitted by the LED chip and passes through the beam homogenizing and gathering reflector; and calculating the curve shapes of the incident surface and the emergent surface of the beam shaping expander according to the refractive index of the material of the beam shaping expander. According to the LED lamp distribution module designed by the method, the light can be formed into a rectangular light spot with uniform illumination according to the requirement of the road surface, and meanwhile, the light passing through the beam shaping expander has no glare, thus people can feel comfortable.

Description

LED lamp distribution Module Design method
Technical field
The present invention relates to the LED lighting field, especially relate to lamp distribution Module Design methods such as a kind of high-power LED street lamp, Tunnel Lamp, bulkhead lamp capable.
Background technology
The LED lighting source is as novel lighting source, and it has advantages such as energy-saving and environmental protection, long service life, low consumption, has been widely used in occasions such as domestic lighting, commercial lighting, highway lighting, industrial and mineral illumination.
The LED lighting source mainly is the application of LED street lamp or Tunnel Lamp in the application of highway lighting, and existing LED street lamp or Tunnel Lamp have a lamppost, in the lamppost upper end lamp holder is installed, and lamp holder comprises lampshade, housing etc., and LED luminous intensity distribution module is set in lampshade.Common LED luminous intensity distribution module has a substrate, is packaged with one or plurality of LEDs chip on the substrate, and before led chip, is set with lens, and refraction is to the road surface behind the light scioptics that led chip sends.If do not have through the secondary optics design; The light that led chip the sends hot spot of projection on the ground is rounded; Total some irradiate light is on the view on curb, pavement or next door, track; The waste and the light pollution that cause light, road surface also need dispose more light fixture just can make illumination meet standard, causes the loss of the energy.At present, more satisfactory hot spot is according to the uniform rectangular light spot of the illumination of the shape set of road, and hot spot distributes by the road illumination requirement, does not have unnecessary illumination and penetrates pavement or roadside view, meets requirement energy-conservation and distribution according to need light.
Notification number is that the Chinese utility model patent of CN201348195Y discloses the innovation and creation of a kind of " LED street lamp lens device " by name; The structure chart of this lens devices and led chip is as shown in Figure 1; It has the pedestal 11 of a cuboid; The below of pedestal 11 is provided with to the oval cylinder 12 that extends below, and the middle part of oval cylinder 12 end faces is provided with the hollow bulb 13 to lower recess, and substrate 15 is encapsulated in the hollow bulb 13.Be packaged with a LEDs chip 14 in the lower surface of substrate 15, the light that led chip 14 sends passes oval cylinder 12 directive road surfaces.Because a pair of side of oval cylinder 12 is planes, and the lower surface is roughly rectangular, so light passes the hot spot that forms behind oval cylinder 12 lower surfaces and roughly becomes rectangle, can avoid light directive curb and causes luminous energy waste and light pollution.
But because the luminous angle of led chip 14 is roughly 170 °, so part light will be from the sidewall ejaculation of oval cylinder 12, and this part light is the directive place far away apart from face to be illuminated often.Therefore; The light that led chip 14 sends still has part light to fail to be fully used after passing this lens devices, and simultaneously, the luminous angle of led light source can produce dazzle after greater than the dazzle angle; Pedestrian and driving are caused potential safety hazard; Road illumination is not enough, also need increase the number of led chip and the power of light fixture, causes waste of electric energy.
And; Require the illumination of face to be illuminated even in the road lighting, if led light source is not carried out secondary light-distribution design, in the time of will causing irradiate light that led chip sends on the road surface; It is brighter the subregion to occur; The situation that the subregion is darker is unfavorable for pedestrian and driver's observation road surface situation, causes potential safety hazard.
Summary of the invention
The purpose of this invention is to provide a kind of LED lamp distribution Module Design method that can hang down damage ground formation rectangular light spot.
For this reason; In the LED lamp distribution Module Design method provided by the invention; This LED lamp distribution module comprises substrate; Be packaged with led chip on the substrate, along on the direction of illumination of led chip dodging and beaming reflector being set; The dodging and beaming reflector light direction is provided with the beam shaping beam expander of processing with the high transmission rate material, and the one side that the beam shaping beam expander has towards dodging and beaming reflector is provided with the plane of incidence and relatively simultaneously is provided with exit facet with the plane of incidence, and this method comprises according to the illumination requirement of face to be illuminated with environmental requirement confirms the position of led chip and the convergent angle of dodging and beaming reflector; And the light that led chip is sent is divided into the grid that a plurality of areas equate through the isolux behind the dodging and beaming reflector, will also be divided into the grid that same a plurality of area equates according to the road surface; Distribute and lighting requirement confirms that light that led chip sends is through the maximum beam angle behind the dodging and beaming reflector according to light; Set up the grid of face to be illuminated and the corresponding relation between the grid of road surface; And calculate the angle of the light needs deflection of led chip according to the refractive index of beam shaping beam expander material; Curve according to light distribution situation and maximum beam angle calculating beam shaping beam expander at first direction; On the second direction vertical, carry out cylinder again and extend, obtain the curve form of the plane of incidence and exit facet with first direction.
In the LED lamp distribution module by the said method design; Dodging and beaming reflector can be converged in the light that led chip sends in the less beam angle, and, pass through the maximum beam angle that dodging and beaming reflector is controlled beam projecting in the design process; The light-ray condensing that sends of led chip penetrates in the dead ahead of led chip like this; Form the hot spot of rectangle again through the refraction of beam shaping beam expander, thereby meet the requirement of face to be illuminated, prevent the generation of dazzle and the waste of minimizing light.
A preferred scheme is, in the step of the grid of setting up face to be illuminated and lattice relationship through light isolux behind the dodging and beaming reflector, equates to be condition with the take up an official post luminous flux of equiluminous veil lattice of face to be illuminated with the luminous flux of face to be illuminated grid.
This shows; LED lamp distribution module according to above-mentioned condition setting; Can guarantee the uniform directive of the light road surface that led chip sends; Thereby guarantee to be received light even, avoid on the road surface, forming lighted region at interval and dim zone, help driver and pedestrian and see the road surface situation clearly according to the road surface.
Further scheme is; In the step of calculating the plane of incidence and exit facet; On first direction; Being incident to behind the beam shaping beam expander from the edge that exit facet shines the road surface grid with the light of maximum beam angle outgoing is that the border of first direction is a condition, and in second direction, being incident to behind the beam shaping beam expander from the edge that exit facet shines road surface second direction grid with the light of maximum beam angle outgoing is that the border of second direction is a condition.
Through above-mentioned boundary condition, to calculate at first direction, light is separated at aspheric one group, and this is separated is two curves, and the physical significance of this two curve is that Ray Of Light passes through to arrive on the predetermined grid of face to be illuminated after the refraction of the optically denser medium between this curve.Separate according to first group, go out the N group with the continuous iterative computation of iterative method and separate, till another border.Because what calculate separates all within the border of maximum beam angle, so after the light process aspheric surface, light can not have the scope that light exceeds grid by aspheric steering handle light refraction to the face to be illuminated of required illumination.
Further scheme is again, and the middle part of the plane of incidence constitutes the cylinder to the body recess of beam shaping beam expander, and exit facet has to the protruding cambered surface of light exit direction, and the center line face of cylinder and the center line face of cambered surface are overlapping.It is thus clear that the light that gets into lens is during from the cambered surface outgoing, incidence angle is less, can avoid the generation of total reflection phenomenon, thereby reduces the loss of light in lens medium.
Description of drawings
Fig. 1 is the structural representation of existing a kind of LED lamp distribution lens.
Fig. 2 is the dodging and beaming reflector of the LED lamp distribution module that designs according to the embodiment of the invention and the structure chart of beam shaping beam expander.
Fig. 3 is the cutaway view of the beam shaping beam expander of the LED lamp distribution module that designs according to the embodiment of the invention.
Fig. 4 is the index path of the LED lamp distribution module that designs according to the embodiment of the invention.
Fig. 5 is the sketch map that will pass through the isolux division grid of dodging and beaming reflector light in the embodiment of the invention.
Fig. 6 is the sketch map that will be divided grid in the embodiment of the invention according to the road surface.
Below in conjunction with accompanying drawing and embodiment the present invention is described further.
The specific embodiment
The LED lamp distribution module of design is positioned at the lamppost upper end of LED light fixture according to the present invention, and is sealed in the lampshade, and LED lamp distribution module and quilt are had 5-12 rice according to the vertical range between the road surface usually.
LED lamp distribution module has a substrate, is packaged with the plurality of LEDs chip on the substrate, and each LEDs chip all is provided with down.Chip position is provided with dodging and beaming reflector on substrate, below dodging and beaming reflector, also is provided with the beam shaping beam expander, and the structure of dodging and beaming reflector and beam shaping beam expander is as shown in Figure 2.
Dodging and beaming reflector 20 has perisporium 21, and the upper end of perisporium 21 is a light inlet 22, and light inlet 22 can be fixed on the substrate, and led chip is encapsulated in the light inlet 22.With light inlet 22 relative ends be light-emitting window 23, the light that led chip sends outwards penetrates through light-emitting window 23.
Below dodging and beaming reflector 20, just the direction of illumination that emits beam of led chip is provided with beam shaping beam expander 30.Beam shaping beam expander 30 is fixed in the lampshade through syndeton and forms sealing, and its structure is as shown in Figure 3.
Beam shaping beam expander 30 has body 31, and the upper surface of body 31 is the plane of incidence 32, and just the plane of incidence 32 is provided with towards dodging and beaming reflector 20.The middle part of the plane of incidence 32 is provided with the non-spherical cylinder 33 to body 31 sunken insides, and non-spherical cylinder 33 runs through the pair of sidewalls of body 31.Visible by Fig. 3 and Fig. 4, two surfaces of non-spherical cylinder 33 are respectively inclined-plane 34 and inclined-plane 35, and the light that reflects through dodging and beaming reflector 20 perisporiums 21 can be incident on inclined-plane 34 or the inclined-plane 35, and is incident in the body 31.
Shown in Figure 3 is the cutaway view of beam shaping beam expander 30 on the xOz face, and beam shaping beam expander 30 is the cylinder bodies that stretching forms on the y direction of principal axis that are projected in along the xOz face.
Non-spherical cylinder 33 has a center line face 36, and it crosses the crestal line of non-spherical cylinder 33 and vertical with the planar section of the plane of incidence 32, and two inclined- planes 34,35 and the center line face 36 of non-spherical cylinder 33 are symmetrical set.
The lower surface of body 31 is an exit facet 37, and exit facet 37 is oppositely arranged with the plane of incidence 32.Be provided with to the protruding cambered surface 38 of light exit direction at the middle part of exit facet 37.Center line face 39 is overlapping with the center line face 36 of non-spherical cylinder 33.From the light of beam shaping beam expander 30 outgoing through cambered surface 38 outgoing.
Led chip 40 is positioned on the light inlet 22 of dodging and beaming reflector 20; Light that led chip 40 sends through after the reflection of perisporium 21 from light-emitting window 23 outgoing; And be incident on two inclined- planes 34,35 of non-spherical cylinder 33; After passing through the refraction of beam shaping beam expander 30 again, from the exit facet 37 directive road surfaces of beam shaping beam expander 30.In the present embodiment, the axis of dodging and beaming reflector 20 is positioned on the center line face 36 of non-spherical cylinder 33, and led chip 40 also is positioned on the center line face 36 of non-spherical cylinder 33.
The light that led chip 40 sends is through after the reflection of dodging and beaming reflector 20; Beam angle is converged in the less angle; The light that is reflected can be incident to less incidence angle on two inclined- planes 34,35 of non-spherical cylinder 33, reflects in the body that is incident to beam shaping beam expander 30 31 backs.Like this; Dodging and beaming reflector 20 is with the ray-collecting around the directive led chip 40 and light is penetrated from the place ahead of led chip 40; And all be incident to beam shaping beam expander 30 from the light of dodging and beaming reflector 20 outgoing, reduced luminous angle, prevent that dazzle from producing; Reduce the waste of luminous energy, also save electric energy.
Simultaneously; The part of beam shaping beam expander 30 exit facets 37 is designed to the cambered surface 38 of aspheric surface shape; Reduce light from body 31 outgoing of beam shaping beam expander 30 incidence angle when another medium (air); Avoided taking place the phenomenon of total reflection, also can avoid the waste of luminous energy effectively, improved the utilization rate of light at this interface.
And; Because beam shaping beam expander 30 projection in one direction is that one dimension is an aspheric surface; Projection on other direction is a straight line, and is as shown in Figure 4, behind the light process beam shaping beam expander 30; Light is evenly distributed in and is shone on the road surface, forms significantly the effect of " rectangle " hot spot uniformly.
When making the LED light fixture, need to make lamppost, lampshade etc., and the LED lamp distribution module of design and installation in lampshade.During design luminous intensity distribution module; At first according to lighting condition and lighting environment requirement; Like the brightness of illumination requirement on road surface, the length of hot spot and the requirement of width requirement, led light source and road surface vertical range etc.; Confirm position, confirm the maximum beam angle after light that led chip sends passes through dodging and beaming reflector, design dodging and beaming reflector with this as led chip and the dodging and beaming reflector of light source.The dodging and beaming reflector that present embodiment designed, its method for designing can be the Chinese invention patent application of CN101900296A with reference to publication number.Certainly, also can use other the reflective device of designing method.
Behind the design dodging and beaming reflector; Can confirm the maximum beam angle of light according to the width of face to be illuminated from the dodging and beaming reflector outgoing; As shown in Figure 4; Light L1, L2 all are from the led chip outgoing, and the light of process dodging and beaming reflector lower limb, and the angle between light L1, the L2 is maximum beam angle.
Since the light that sends of led chip with the equidistant sphere of led chip on be that illumination equates, so the isolux of led chip approaches a hemisphere face.After the reflection through dodging and beaming reflector, isolux is a curved surface after the convergence.
During design luminous intensity distribution module, the isolux of light after through the dodging and beaming reflector light-emitting window is divided into a plurality of areas equates grid, as shown in Figure 5.Simultaneously, face to be illuminated also is divided into the grid that same a plurality of area equates, as shown in Figure 6, can require definite sizing grid and quantity of dividing according to the uniformity on road surface when dividing grid, grid is many more, and the uniformity of illumination is good more.Then, set up the grid of isolux and the grid corresponding relation of face to be illuminated.Wherein, the luminous flux of corresponding grid equates, when grid at y direction differential after to a certain degree, just become a line.Then, in the y direction this curve is carried out cylinder and extend, up to till another border on the y direction.
Relation according to road surface grid and isolux grid; Can draw the angle of sending the needs skew of light beam from led chip; Promptly, can calculate the curve form of light at the beam shaping beam expander plane of incidence and exit facet according to the refractive index of beam shaping beam expander material.
Certainly; When the design plane of incidence and exit facet, also need consider through behind the light entering beam shaping beam expander with maximum beam angle outgoing behind the dodging and beaming reflector, when refraction takes place; Also can reflect; From the light of exit facet outgoing, avoid the reflected illumination that light takes place to arrive outside the predetermined road surface as far as possible, can avoid the loss and generation dazzle of light energy like this.
In addition, when the design plane of incidence and exit facet, need to be equated being condition with the arbitrary grid luminous flux of isolux by luminous flux according to arbitrary grid on the road surface, this realizes with the integral equality of quilt according to the road surface luminous flux through the luminous flux of setting up isolux.And; In the step of the curve form of the calculating plane of incidence and exit facet; The edge that also need be incident to the light of maximum beam angle outgoing behind the beam shaping beam expander from the irradiate light of exit facet outgoing to face to be illuminated is a boundary condition, and this can realize through the curve form that changes the plane of incidence and exit facet.
Visible by such scheme; The light that led chip sends can be controlled in the less beam angle effectively, and light passes on the road surface that beam shaping beam expander and directive need illuminate, and forms rectangular light spot; Light is soft comfortable to human eye simultaneously; Harmless to human eye, no light pollution can form rectangular light spot with mode cheaply.And; Above-mentioned method for designing has been considered by the actual illumination situation according to the road surface; Isolux through with dodging and beaming reflector light-emitting window place is divided into grid, and will be divided into grid according to the road surface, and the luminous flux through corresponding grid equates to guarantee equated according to each grid place luminous flux on the road surface on the x direction of principal axis with on the y direction of principal axis; Avoid on the road surface, forming the dark space, help driver and pedestrian and observe the road surface situation.
Certainly, the foregoing description only is a preferred version of the present invention, also has other variation during practical application; For example; Use collector lens to substitute the light collecting device of dodging and beaming reflector as convergence, like this, led chip need be arranged on the optical axis of collector lens; And the center line face of the non-spherical cylinder of beam shaping beam expander also passes through the optical axis of collector lens, and such change also can realize the object of the invention.
It is emphasized that at last; The invention is not restricted to above-mentioned embodiment, also should be included in the protection domain of claim of the present invention like the change of the methods for designing such as type of the change of the change of the size of rectangular light spot, dodging and beaming reflector convergent angle, led light source.

Claims (6)

1.LED lamp distribution Module Design method; This LED lamp distribution module comprises substrate; Be packaged with led chip on the said substrate, be provided with the beam shaping beam expander along the dodging and beaming reflector, the dodging and beaming reflector light direction that are provided with on the direction of illumination of said led chip; Said beam shaping beam expander has that one side towards said dodging and beaming reflector is provided with the plane of incidence and the another side relative with the said plane of incidence is provided with exit facet, and this method comprises
According to face to be illuminated and environmental requirement; Confirm the position of said led chip and said dodging and beaming reflector; And the light that said led chip is sent is divided into the grid that a plurality of areas equate through the isolux behind the said dodging and beaming reflector, will also be divided into the grid that a plurality of areas equate according to the road surface;
Distribute and lighting requirement confirms that light that said led chip sends is through the maximum beam angle behind the said dodging and beaming reflector according to the light of face to be illuminated; Set up the corresponding relation of said face to be illuminated grid and said isolux grid; And calculate the angle of light needs deflection, and calculate the said plane of incidence of said beam shaping beam expander and the curve form of said exit facet according to said smooth distribution situation and said maximum beam angle according to the refractive index of beam shaping beam expander material.
2. LED light fixture according to claim 1 is transported to the optical module method for designing, it is characterized in that:
Set up in the step of corresponding relation of said face to be illuminated and said isolux, equated to be condition by luminous flux with the arbitrary grid luminous flux of said isolux according to arbitrary grid on the road surface with said.
3. LED lamp distribution Module Design method according to claim 1 is characterized in that:
Calculate in the step of curve form of the said plane of incidence and said exit facet, the edge that is incident to behind the said beam shaping beam expander from the irradiate light of said exit facet outgoing to said face to be illuminated with the light of said maximum beam angle outgoing is a boundary condition.
4. according to each described LED lamp distribution Module Design method of claim 1 to 3, it is characterized in that:
The middle part of the said plane of incidence constitutes the cylinder to the body recess of said beam shaping beam expander.
5. LED lamp distribution Module Design method according to claim 4 is characterized in that:
Said exit facet has to the protruding cambered surface of light exit direction, and the center line face of said cambered surface and the center line face of said cylinder are overlapping.
6. according to each described LED lamp distribution Module Design method of claim 1 to 3, it is characterized in that:
Said dodging and beaming reflector has one towards the light-emitting window of said beam shaping beam expander and the light inlet relative with said light-emitting window, and said led chip is located at the center of light inlet.
CN2011100083833A 2011-01-15 2011-01-15 Designing method of distribution module of LED lamp Expired - Fee Related CN102121678B (en)

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PCT/CN2012/070248 WO2012095006A1 (en) 2011-01-15 2012-01-12 Light distribution module design method for led lamps

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