CN104534326A - Rectangular light distribution device for high power LED lamp - Google Patents
Rectangular light distribution device for high power LED lamp Download PDFInfo
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- CN104534326A CN104534326A CN201410827798.7A CN201410827798A CN104534326A CN 104534326 A CN104534326 A CN 104534326A CN 201410827798 A CN201410827798 A CN 201410827798A CN 104534326 A CN104534326 A CN 104534326A
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- reflecting piece
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S2/00—Systems of lighting devices, not provided for in main groups F21S4/00 - F21S10/00 or F21S19/00, e.g. of modular construction
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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
- F21V7/00—Reflectors for light sources
- F21V7/04—Optical design
- F21V7/08—Optical design with elliptical curvature
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- 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
- F21Y2101/00—Point-like light sources
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- General Engineering & Computer Science (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Abstract
The invention relates to a rectangular light distribution device for a high power LED lamp. The device comprises a radiator, first light reflecting sheets, second light reflecting sheets and LED light sources. The radiator is of an integrated structure which is formed by a cylinder part and a plurality of radiating ribs, and the cylinder part is composed of a cylinder structure part and a trapezoid structure part. The radiating ribs are arranged on the circumferential face of the cylinder structure part, and the root portions of all the radiating ribs are connected with the cylinder structure part. The first light reflecting sheets and the second light reflecting sheets are located between every two adjacent radiating ribs, the light reflecting faces of the first light reflecting sheets and the light reflecting faces of the second light reflecting sheets are oppositely placed, and one end of each first light reflecting sheet and one end of the corresponding second light reflecting sheet are connected with the outline parts on the two side edges of the bottom face of the trapezoid structure part respectively. The LED light sources are located between the first light reflecting sheets and the second light reflecting sheets and are fixedly connected with the bottom face of the trapezoid structure part. Light emitted from the LED light sources irradiates to the space after being subjected to light distribution by the first light reflecting sheets and the second light reflecting sheets, and accordingly rectangular light distribution can be achieved.
Description
Technical field
The invention belongs to LED lamp technical field, relate to a kind of high-power LED lamp, particularly relate to a kind of rectangle light distribution device that can realize high-power LED lamp.
Background technology
Under the background of global energy shortage, economize energy is the major issue that we will face future.At lighting field, LED lamp as a kind of novel green light source product, the trend of necessarily future development.In LED lamp design, fansink designs and luminous intensity distribution design are even more important, and heat dissipation design is related to the life-span of light fixture, and luminous intensity distribution design is then closely bound up with illuminating effect.Usually, in LED lamp, radiator and secondary light-distribution device are designed by heat dissipation design personnel and optical designers respectively, and need out two molds, are then produced by two different production equipments.Fig. 1 is the LED lamp of a common rectangle luminous intensity distribution on market, LED lamp mainly comprises following parts: light fixture fixed support a, driving power b, radiator c, LED light source d and rectangle luminous intensity distribution reflector e, separate between each parts of LED lamp, be screwed between adjacent two parts.The process need of radiator and secondary light-distribution device independent design, production pays two mold expenses, and take two cover production equipments, therefore production cost is high.In addition, also need after having produced to couple together with key screw two parts, the operation of this assembling will inevitably increase production cost again, extends manufacture cycle.
Summary of the invention
(1) technical problem that will solve
The object of the invention is to solve prior art and need out two molds, the technical problem that processing cost is high, assembly process is various, a kind of rectangle light distribution device directly realizing high power LED lamp is on a heat sink provided thus.
(2) technical scheme
In order to reach described object, the invention provides a kind of rectangle light distribution device of high power LED lamp, this device comprises radiator, the first reflecting piece, the second reflecting piece, LED light source; Radiator forms integrative-structure by a trunk portion and multiple radiated rib, and trunk portion is made up of cylindrical structure portion and prismatoid structural portion; Cylindrical structure portion periphery arranges multiple radiated rib, and the root of each radiated rib is connected with cylindrical structure portion respectively, and the first reflecting piece and the second reflecting piece are between two radiated ribs of neighbour; The reflective surface of the first reflecting piece and the reflective surface of the second reflecting piece staggered relatively, one end of the first reflecting piece, one end of the second reflecting piece respectively with the bottom surface dual-side contour linkage of prismatoid structural portion; LED light source is between the first reflecting piece and the second reflecting piece and be fixedly connected with on the bottom surface of prismatoid structural portion; The light that LED light source sends, by directive space after the first reflecting piece and the second reflecting piece luminous intensity distribution, forms rectangle luminous intensity distribution.
(3) beneficial effect
The present invention proposes on the radiator of LED lamp, realize LED lamp rectangle luminous intensity distribution, LED lamp rectangle luminous intensity distribution first reflecting piece, the second reflecting piece and the integral device of fansink designs will be realized, this one device can realize LED lamp heat radiation, can realize again LED lamp rectangle luminous intensity distribution.The radiator that the present invention proposes and rectangle luminous intensity distribution first reflecting piece, the second reflecting piece only need open a production mould, just can produce with a set of extrusion equipment simultaneously, compared with the manufacturing process that radiator, the rectangle light distribution device of the present invention and prior art design separately, produce, present invention saves the die sinking expense of rectangle light distribution device.Radiator and rectangle luminous intensity distribution first reflecting piece, the second reflecting piece are structure as a whole in addition, and without the need to assembling between them, this can reduce by one assembling procedure, reduce the assembly difficulty of LED lamp, and are conducive to the production cycle shortening LED lamp.Therefore, the present invention effectively can reduce the production cost of rectangle light-distribution LED light fixture and shorten production cycle of LED lamp.
Accompanying drawing explanation
Fig. 1 is the LED lamp of rectangle luminous intensity distribution common in prior art;
Fig. 2 is the stereogram that the present invention realizes the rectangle light distribution device of high power LED lamp;
Fig. 3 a is the front view that the present invention realizes the rectangle light distribution device of high power LED lamp;
Fig. 3 b is the relation schematic diagram in the present invention between angular separation and central angle;
Fig. 3 c is the front view that the present invention realizes the another kind of embodiment of the rectangle light distribution device of high power LED lamp;
Fig. 3 d is the C-γ schematic diagram of the photometric distribution describing the rectangle luminous intensity distribution that the present invention realizes;
Fig. 3 e is the parameter of curve schematic diagram of reflecting piece stretching bus in the present invention;
A kind of embodiment that Fig. 4 a is LED light source quantity when being 3;
A kind of embodiment that Fig. 4 b is LED light source quantity when being 6;
Fig. 5 is the outgoing figure of LED light source of the present invention at XOY plane light;
Fig. 6 is the distribution curve flux formed after Fig. 3 a embodiment device luminous intensity distribution;
Fig. 7 is the optical field distribution figure formed on the receiving surface after Fig. 3 a embodiment device luminous intensity distribution;
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearly understand, below in conjunction with specific embodiment, and with reference to accompanying drawing, the present invention is described in more detail.
Refer to Fig. 2 and illustrate that the present invention realizes the stereogram of a kind of embodiment of the rectangle light distribution device of high power LED lamp, described device comprises radiator 1, first reflecting piece 4, second reflecting piece 5, LED light source 6; Radiator 1 forms integrative-structure by a trunk portion and multiple radiated rib 3.Trunk portion is made up of cylindrical structure portion 2a and prismatoid structural portion 2b.2a periphery in cylindrical structure portion arranges multiple radiated rib 3, and the root of each radiated rib 3 is connected with cylindrical structure portion 2a respectively; First reflecting piece 4 and the second reflecting piece 5 are between two radiated ribs 1 of neighbour; The reflective surface of the first reflecting piece 4 and the reflective surface of the second reflecting piece 5 staggered relatively, one end of the first reflecting piece 4, one end of the second reflecting piece 5 are connected with bottom surface 2b4 dual-side profile 2b5,2b6 of prismatoid structural portion 2b respectively; LED light source 6 is between the first reflecting piece 4 and the second reflecting piece 5 and be fixedly connected with on the bottom surface 2b4 of prismatoid structural portion 2b.Radiator 1 entirety is sun flower pattern radiator.LED light source 6 be energized work time, the heat that LED light source produces is delivered to trunk portion by bottom surface 2b4, the root of heat from radiated rib 3 is transmitted to top by the position be connected with radiated rib 3 by trunk portion, heat in transmittance process by each surface of radiator with cross-ventilated process in fall apart.And the light that LED light source 6 sends, a part directly directive space, another part reflects rear directive space by the first reflecting piece 4 and the second reflecting piece 5, forms rectangle luminous intensity distribution.
First embodiment, continues and refers to the front view that Fig. 3 a illustrates Fig. 2 embodiment, wherein:
The cylindrical structure that the cross section of cylindrical structure portion 2a is made up of arc profile 2a1 and the wide 2a2 of a straight line cincture; The radius R 1 of arc profile 2a1 is in the scope of 20mm to 100mm, and the radius R 1 of arc profile 2a1 is 35mm; The angle of the central angle of arc profile 2a1 is in the scope of 180 ° to 300 °, and it is 270 ° that the angle of the central angle of arc profile 2a1 described in embodiment is selected; Straight line profile 2a2 is formed by connecting by two end points of arc profile 2a1.
The cross section profile of prismatoid structural portion 2b is made up of straight line profile 2a2, the first hypotenuse profile 2b1, the second hypotenuse profile 2b2 and base profile 2b3; Distance 7 is the distances between straight line profile 2a2 and base profile 2b3, and the span of described distance 7 is 0 to 30mm, and distance 7 described in embodiment is selected as 12mm.
Refer to Fig. 3 b, the angular separation shown in it is α is described first hypotenuse profile 2b1, the angular separation of the second hypotenuse profile 2b2 respectively and between the radiated rib 3 of neighbour; The bottom surface 2b4 of prismatoid structural portion 2b is smooth rectangle plane, and the four edges of bottom surface 2b4 is made up of two base profile 2b3 and first side profile 2b5, second side 2b6 profile.
Multiple radiated ribs 3 on cylindrical structure portion 2a periphery are for heat radiation; The radius of multiple radiated rib 3 is R2, and radius R 2 range of choice of described radiated rib 3 is at 50mm to 300mm, and in the present embodiment, the radius R 2 of radiated rib 3 is selected as 100mm; Have an angular separation α between every two adjacent heat radiation fins 3, the scope of described angular separation α is at 6 ° to 12 °, and it is 9 ° that the angular separation α in Fig. 3 a embodiment selects; The quantity n of multiple radiated rib 3 is determined according to formula (1) by the central angle φ of angular separation α and arc profile 2a1, and in the present embodiment, the quantity of multiple radiated rib is selected is 29.The central angle φ (referring to Fig. 3 b) of the angular separation α between adjacent two radiated ribs 3 and the first arc profile 2a1 adjusts according to the power of LED lamp, and the quantity of radiated rib 3 also adjusts thereupon.
n＝[φ/α]-1 (1)
Wherein " [] " mathematic sign that is round numbers.
Refer to Fig. 2 and Fig. 3 a, one end of described first reflecting piece 4, second reflecting piece 5 forms integrative-structure with dual-side profile 2b5,2b6 of the bottom surface 2b4 of prismatoid structural portion 2b respectively; First reflecting piece 4 and the second reflecting piece 5 are placed about the Y-axis symmetry of the coordinate system OXYZ in the column structure portion shown in Fig. 3 c, the face type of the first reflecting piece 4 and the second reflecting piece 5 can design according to light distribution requirements, can be face directly, one in parabola, ellipsoid, hyperboloid, sphere and free form surface.The radius of the first reflecting piece 4 and the second reflecting piece 5 can adjust according to light distribution requirements, is not limited to the radius R 2 of described radiated rib 3, and described in the present embodiment, the radius of the first reflecting piece 4 and the second reflecting piece 5 all has identical radius R 2 with radiated rib 3.
Second embodiment, referring to Fig. 3 c is the distance 7 of straight line profile 2a2 and base profile 2b3 a kind of embodiment when equaling 0mm, the coordinate system OXYZ of middle column body structural portion of the present invention is also show in Fig. 3 c, initial point O is the center of circle of arc profile 2a1, X-axis level to the right, straight up, the vertical paper of Z axis is outside for Y-axis.Rectangle light distribution device shown in Fig. 3 c is made up of radiator 1, first reflecting piece 4 and the second reflecting piece 5.Radiator 1 is made up of column structure portion 2a and multiple radiated rib 3.The cross section of column structure portion 2a is made up of arc profile 2a1 and straight line profile 2a2; In the present embodiment, the radius R 1 of arc profile 2a1 is selected as 35mm; It is 260 ° that the central angle φ of arc profile 2a1 selects; Straight line profile 2a2 is connected to form by two end points of arc profile 2a1.When the central angle of arc profile 2a1 is larger, the cylinder bottom width formed is narrower when being not enough to place LED light source 6, column structure portion 2a can be designed to the column structure portion form that cylindrical structure portion 2a in Fig. 3 a first embodiment and prismatoid structural portion 2b combines.Multiple radiated rib 3 is arranged on the periphery of column structure portion 2a, and the root of multiple radiated rib 3 is connected with column structure portion 2a; In the present embodiment, the angular separation α of adjacent two radiated ribs 3 selects is 9 °; The quantity n of multiple radiated rib 3 is determined by formula (1) equally, and in the present embodiment, the quantity of multiple radiated rib 3 is selected is 25; The radius R 2 of multiple radiated rib 3 is selected as 100mm; The radius of the first reflecting piece 4 and the second reflecting piece 5 is not limited to the radius of multiple radiated rib 3 equally, can adjust according to light distribution requirements, equal with the radius R 2 of multiple radiated rib 3 in the present embodiment.
Because rectangle light distribution device of the present invention can only change the exit direction (namely can only change the beam angle of C90 °-C270 ° of plane distribution curve flux) of the light incided in the first reflecting piece and the second reflecting piece, so light distribution requirements is shape to the distribution curve flux of C90 °-C270 ° plane and beam angle requirement.After the arrangement mode of light distribution requirements and LED light source 6 is determined, the length of base profile 2b3 can be determined, then utilize software simulation to obtain the face shape parameter of reflecting piece.Such as: in the present embodiment, the stretching bus of reflecting piece is that the opening size that the part of elliptic curve and prismatoid structural portion bottom surface 2b4 intersect is determined by the length of base profile 2b3, according to light distribution requirements, the parameter of elliptic curve and the radius of reflecting piece can be adjusted, for realizing light distribution requirements, the parameter of described elliptic curve is oval major axis, oval minor axis.
For the utility model rectangle light distribution device, the conventional C-γ coordinate system shown in Fig. 3 d is adopted to describe its photometric distribution situation.Wherein D point is the central point of bottom surface 2b4, and C is all vertical half-plane by light fixture vertical axes DD ', and be rotated counterclockwise as just from the vertical half-plane of C=0 ° to arbitrary vertical half-plane, span is 0 ° to 360 °; γ is the angle in arbitrary vertical half-plane C between either direction and vertical axes DD ', and rotate from vertical axes DD ' to either direction and determine the positive and negative of angle, be rotated counterclockwise as just, clockwise turn to negative, span is-180 ° to 180 °.Either direction in space is determined by the value of vertical half-plane C and the angle γ between this direction and vertical axes DD ', as A (CA, γ A) direction determined by C=CA and γ=γ A, B (CB, γ B) direction is determined by C=CB and γ=γ B.Wherein, CA, CB are the angle between the vertical half-plane at place, A, B direction and the vertical half-plane of C=0 °, and the vertical half-plane from the vertical half-plane of C=0 ° to place, A, B direction is rotated counterclockwise determines corner dimension, and symbol is just, unit is degree; γ A, γ B are respectively the angle between A, B direction and vertical axes DD ', and rotate to be from vertical axes DD ' to A, B direction and be rotated counterclockwise, symbol is just, unit is degree.C0 °-C180 ° plane is the plane of two vertical half-plane compositions of C=0 ° and C=180 °, the YOZ plane in corresponding diagram 3c; Described C90 °-C270 ° plane is the plane of two vertical half-plane compositions of C=90 ° and C=270 °, the XOY plane in corresponding diagram 3c.
Described rectangle light distribution device can realize rectangle luminous intensity distribution to high-power LED light source 6, but the kind of LED light source 6 and arrangement mode thereof are not limited to the situation shown in Fig. 2, can be other LED light sources and other arrangement modes, Fig. 4 a and Fig. 4 b illustrate respectively the quantity of LED light source 6 be 3 and 6 time embodiment.
As Fig. 5 illustrates the outgoing figure of LED light source 6 of the present invention at XOY plane light, between the light of LED light source 6 outgoing on XOY plane and the optical axis of LED light source 6, there is multiple angle of emergence, when the described angle of emergence is less than boundary θ angle, angle, the direct outgoing of emergent ray is to space, when the angle of emergence is in time demarcating between angle θ-90 °, the emergent ray of LED light source 6 is incident on the first reflective surface 4a of the first reflecting piece 4 and the second reflective surface 5a of the second reflecting piece 5, outgoing again after being reflected by the first reflective surface 4a and the second reflective surface 5a, this just makes the distribution curve flux of LED light source 6 in C90 °-C270 ° plane (i.e. XOY plane) be no longer lambert's type distribution curve flux, but aerofoil profile distribution curve flux (the curve L in Fig. 6
2), by the direct outgoing of the light of LED light source 6 in YOZ plane to space, namely the distribution curve flux of C0 °-C180 ° of plane is still lambert's type distribution curve flux (curve L in Fig. 6
1).The light sent due to LED light source 6 is not identical with the distribution curve flux in C90 °-C270 ° plane in C0 °-C180 ° plane, receiving plane a long way off will be formed the hot spot (as shown in Figure 7) of a rectangle, namely achieve rectangle luminous intensity distribution.
The described angle of emergence is the angle between the emergent ray of LED light source 6 and optical axis (negative Y-axis).
Wherein: the integrative-structure of described radiator 1 is that Extrusion Process of Aluminum Alloy Profile is shaping.
Wherein: the first reflective surface 4a of described first reflecting piece 4, the second reflective surface 5a of the second reflecting piece 5 are through the surface of process of aluminizing, in order to the reflectivity making this surface have 90%.
The concrete steps of the rectangle light distributing method of high power LED lamp of the present invention are as follows:
Step S1: according to LED lamp power and fitting structure (being determined by designing requirement), the structural parameters of design radiator;
The structural parameters of described radiator comprise the angular separation α between the length of radiator 1, cylindrical structure portion radius R 1, radiated rib radius R 2, central angle φ, adjacent two radiated ribs.
Step S2: according to arrangement mode and the arrangement size of the single led dimension of light source determination LED light source 6 of LED lamp power and use, determine the length of base 2b3 and the version of radiator trunk portion by the arrangement size of LED light source 6.When the length of straight line profile 2a2 enough places LED light source 6, adopt the version shown in Fig. 3 c, otherwise then adopt the version shown in Fig. 3 b.
Step S3: according to light distribution requirements (being determined by designing requirement), utilizes conventional optical design software TracePro simulate and determine the parameter of curve of reflecting piece stretching bus.Example is designed to the parameter of curve of the ellipsoid type reflecting piece in the first embodiment, in the parameter setting interface of TracePro reflecting surface, be set to the opening radius of ellipsoid with the half of the length of base profile 2b3, the value of adjusting focal length 1, focal length 2 and reflecting surface length is to reach the light distribution requirements of expection; Then according to the parameter of curve of analog result determination reflecting piece stretching bus.The parameter of curve of the stretching reflecting piece (referring to Fig. 3 e) of described ellipsoid type has: transverse aa, ellipse short shaft bb, base profile 2b3 is to the distance dd of elliptical center 0 '.
For other face types, as parabolic shape, in the parameter setting interface of TracePro reflecting surface, equally with the half of the length of base profile 2b3 for opening radius, adjusting focal length and reflecting surface length, reach expection light distribution requirements after can determine its face shape parameter.
Step S4: according to the parameter of curve of the reflecting piece stretching bus that step S3 obtains, designs the first reflecting piece 4 and the second reflecting piece 5 in the both sides of the bottom surface of the trunk portion of radiator 1.
Step S5: make extrusion die according to the design drawing that step S4 obtains, and utilize extruder once to extrude the rectangle light distribution device of high power LED lamp.
Step S6: carry out anodized to the surface of whole device, then to the first reflective surface 4a of the first reflecting piece 4 and the second reflective surface 5a of the second reflecting piece 5 plating high reflectance aluminium film, makes reflectivity reach 90%.So far, present invention achieves and can dispel the heat to LED light source, the rectangle light distribution device of the high power LED lamp of LED lamp rectangle luminous intensity distribution object can be reached again.
The above; be only the detailed description of the invention in the present invention, but protection scope of the present invention is not limited thereto, any people being familiar with this technology is in the technical scope disclosed by the present invention; the conversion or replacement expected can be understood, all should be encompassed in of the present invention comprising within scope.
Claims (10)
1. a rectangle light distribution device for high power LED lamp, is characterized in that, this device comprises radiator, the first reflecting piece, the second reflecting piece, LED light source; Radiator forms integrative-structure by a trunk portion and multiple radiated rib, and trunk portion is made up of cylindrical structure portion and prismatoid structural portion; Cylindrical structure portion periphery arranges multiple radiated rib, and the root of each radiated rib is connected with cylindrical structure portion respectively, and the first reflecting piece and the second reflecting piece are between two radiated ribs of neighbour; The reflective surface of the first reflecting piece and the reflective surface of the second reflecting piece staggered relatively, one end of the first reflecting piece, one end of the second reflecting piece respectively with the bottom surface dual-side contour linkage of prismatoid structural portion; LED light source is between the first reflecting piece and the second reflecting piece and be fixedly connected with on the bottom surface of prismatoid structural portion; The light that LED light source sends, by directive space after the first reflecting piece and the second reflecting piece luminous intensity distribution, forms rectangle luminous intensity distribution.
2. the rectangle light distribution device of high power LED lamp according to claim 1, it is characterized in that, the cross section in described cylindrical structure portion is made up of arc profile and a straight line cincture exterior feature; The radius of arc profile is 20mm to 100mm; The angle of the central angle of arc profile is 180 ° to 300 °, and straight line profile is formed by connecting by two end points of arc profile.
3. the rectangle light distribution device of high power LED lamp according to claim 1, it is characterized in that, the cross section profile of described prismatoid structural portion is made up of straight line profile, the first hypotenuse profile, the second hypotenuse profile and base profile; Have a distance between described straight line profile and base profile, the value of described distance is 0 to 30mm; Described first hypotenuse profile, the second hypotenuse profile are respectively and have an angular separation between adjacent radiated rib.
4. the rectangle light distribution device of high power LED lamp according to claim 1, it is characterized in that, described bottom surface is made up of two base profiles, first side profile and second side profile.
5. the rectangle light distribution device of high power LED lamp according to claim 1, it is characterized in that, angular separation α between adjacent two radiated ribs and the central angle Φ of the first arc profile adjusts according to the power of LED lamp, and the quantity n=[Φ/α]-1 of radiated rib also adjusts thereupon.
6. the rectangle light distribution device of high power LED lamp according to claim 1, is characterized in that, described first reflecting piece and the second reflecting piece are placed about the Y-axis symmetry of the coordinate system OXYZ in column structure portion; The face type of the first reflecting piece and the second reflecting piece be face directly, one in parabola, ellipsoid, hyperboloid, sphere, free form surface.
7. the rectangle light distribution device of high power LED lamp according to claim 1, is characterized in that, the exit direction changing the light incided in the first reflecting piece and the second reflecting piece is the shape and the beam angle that change C90 °-C270 ° of plane distribution curve flux; After the arrangement mode of light distribution requirements and LED light source is determined, determine the length of base profile, for obtaining the face shape parameter of described reflecting piece.
8. the rectangle light distribution device of high power LED lamp according to claim 1, it is characterized in that, the stretching bus of described reflecting piece is that the opening size that the part of elliptic curve and prismatoid structural portion bottom surface are intersected is determined by the length of base profile, by the adjustment parameter of elliptic curve and the radius of reflecting piece, for realizing light distribution requirements, the parameter of described elliptic curve is oval major axis, oval minor axis.
9. the rectangle light distribution device of high power LED lamp according to claim 1, it is characterized in that, between the light of described LED light source outgoing on XOY plane and the optical axis of LED light source, there is multiple angle of emergence, when the described angle of emergence is less than boundary θ angle, angle, the direct outgoing of emergent ray is to space, when the angle of emergence is in time demarcating between angle θ-90 °, the emergent ray of LED light source is incident on the first reflective surface of the first reflecting piece and the second reflective surface of the second reflecting piece, outgoing again after being reflected by the first reflective surface and the second reflective surface, this just makes the distribution curve flux of LED light source on C90 °-C270 ° i.e. XOY plane be aerofoil profile distribution curve flux, by the direct outgoing of the light of LED light source in YOZ plane to space, namely the distribution curve flux of C0 °-C180 ° of plane is lambert's type distribution curve flux, the light sent due to LED light source is not identical with the distribution curve flux in C90 °-C270 ° plane in C0 °-C180 ° plane, receiving plane a long way off will be formed the hot spot of a rectangle, namely achieve rectangle luminous intensity distribution.
10. the rectangle light distribution device of high power LED lamp according to claim 1, it is characterized in that, first reflective surface of described first reflecting piece, the second reflective surface of the second reflecting piece are through the surface of process of aluminizing, in order to the reflectivity making this surface have 90%.
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Application publication date: 20150422 |