CN102759075B - Rectangular (Light Emitting Diode) reflector and LED light fitting - Google Patents
Rectangular (Light Emitting Diode) reflector and LED light fitting Download PDFInfo
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- CN102759075B CN102759075B CN201110105807.8A CN201110105807A CN102759075B CN 102759075 B CN102759075 B CN 102759075B CN 201110105807 A CN201110105807 A CN 201110105807A CN 102759075 B CN102759075 B CN 102759075B
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Abstract
The invention relates to a rectangular (Light Emitting Diode) reflector and an LED light fitting, wherein the rectangular LED reflector comprises four connected light reflection surfaces, the shape of each light reflection surface is formed by stretching a broken line segment towards the two sides of the broken line segment along a direction vertical to the plane of the broken line segment, the stretching broken lines of opposite light reflection surfaces are identical, and the stretching broken lines of adjacent light reflection surfaces are different; and the LED light fitting comprises an LED light source and the rectangular LED reflector, the LED light source is arranged on the bottom end of the rectangular LED reflector, and the optical axis of the LED light source is overlapped with the axial line of the reflector. The light reflection surface in the invention is formed by stretching the broken line segment, so that the formed reflector can greatly reduce the volume of the reflector when meeting with the light distribution demand of floodlight illumination so as to reduce the volume of the LED light fitting, and the stretching broken lines of the adjacent light reflection surfaces are different to realize the light distribution effect within a rectangular illumination range.
Description
Technical field
The present invention relates to field of illuminating lamps, more particularly, relate to a kind of rectangle LED reflector and LED light fixture.
Background technology
Along with developing rapidly of great power LED technology, at lighting field, more and more adopt LED as light source.LED light source is not through reflector reflection or lens reflection in the situation that, its luminescent ligand light characteristic meets the radiation law of lambert (J.H.Lambert) illuminator, this class illuminator is also referred to as cosine illuminator, its luminous intensity is dI and cos θ positive correlation, it is its brightness B independent of direction, the every bin dS that in formula, dI is expansion optical surface is along the luminous intensity of certain direction r, and θ is the angle of r and normal n.The light that LED light source sends is not when passing through luminous intensity distribution, and its intensity of illumination is very inhomogeneous, in order to obtain lighting effect comparatively uniformly, generally adopts the light that reflector or lens send LED light source to carry out luminous intensity distribution.
Because illumination range and the brightness of single LEDs light source are limited, in the lightings such as the fluffy ceiling light that adopts LED light source as light source, street lamp, corridor lamp, the general plurality of LEDs light source that adopts forms LED array, and in order to meet the needs of floodlighting, every LEDs is equipped with special LED lens or reflector.While adopting LED lens, it is smaller that the volume of lens can design, thereby make the overall dimensions of light fixture compact, but, when the light that LED light source sends passes through LED lens, attenuation ratio is more serious, thereby the utilization ratio of the light that reduction LED light source sends, but also can cause the harmful effect of the overheated grade of LED lens.While adopting reflector, mostly adopt the reflector of cup-shaped, the shape of its reflecting surface is that parabola rotates and forms around bus, the size of this reflector is larger, in order to meet luminous intensity distribution needs, the volume of single reflector approaches 50mm * 40mm * 20mm, and for a light fixture that adopts 4 * 5 20 LEDs arrays, its volume is at least 200mm * 200mm * 20mm.And for the reflector of revolving body, its range of exposures is circular, but in some occasion, needed range of exposures is different in different directions, for example, need roughly rectangular range of exposures, and traditional revolving body reflector just cannot be satisfied the demand.In addition, LED light fixture also needs to consider heat dissipation problem, and this can cause the actual volume of light fixture for more huge, and Heavy Weight had both affected attractive in appearance, increase cost, had increased the weight of again potential risks.
Summary of the invention
The technical problem to be solved in the present invention is, for prior art for the above-mentioned oversize defect of LED reflector, rectangle LED reflector and LED light fixture that a kind of size is enough little are provided, make LED light fixture as much as possible little in the situation lower volume that meets illumination requirement, and can realize the light distribution effect that range of exposures is rectangle.
The technical solution adopted for the present invention to solve the technical problems is: construct a kind of rectangle LED reflector, and for the luminous intensity distribution of LED light source,
Described reflector has a bottom and a rectangular aperture end, described reflector comprises four light reflection surfaces that join, be respectively: the first light reflection surface, the second light reflection surface, the 3rd light reflection surface and the 4th light reflection surface, wherein the first light reflection surface and the 3rd light reflection surface are symmetrical, and the second light reflection surface and the 4th light reflection surface are symmetrical;
Described in each, by a broken line, the direction along vertical this broken line place plane forms to broken line two side stretchings the shape of light reflection surface;
The first light reflection surface, the second light reflection surface are stretched and are formed by first fold line segment, the second broken line respectively;
Described first fold line segment comprises six straightways that are connected successively, when take the center of end face of bottom of reflector, it is initial point, the symmetry axis of end face of reflector bottom of take is X-axis and Y-axis, vertical this end face of take is pointed to openend direction by initial point is when Z-direction is set up cartesian coordinate system, the starting point of described first fold line segment is (0, d/2, 0), wherein d is greater than the diameter of described LED light source, every straightway of described first fold line segment and the angle of Z axis are 0～39 °, every straightway of described first fold line segment and the angle of Z axis are successively decreased by the sequence of positions of origin-to-destination at first fold line segment successively according to this straightway, the angle of the terminal of the starting point of every straightway of described first fold line segment and the line of initial point and this straightway and the line of initial point is 5～15 °,
Described the second broken line comprises four straightways that are connected successively, the starting point of described the second broken line is (d/2, 0, 0), first three straightway in described the second broken line and the angle of Z axis are 8～29 °, first three straightway of described the second broken line and the angle of Z axis are successively decreased by the sequence of positions of origin-to-destination at the second broken line successively according to this straightway, the 4th straightway of described the second broken line stretches out along the direction of the starting point of four straightways of initial point to the, the angle of the starting point of every straightway in first three straightway of described the second broken line and the terminal of the line of initial point and this straightway and the line of initial point is 5～15 °.
In rectangle LED reflector of the present invention, every straightway of described first fold line segment and the angle of Z axis are followed successively by 38.5 °, 33.5 °, 26 °, 23.5 °, 11 °, 0 ° according to this straightway in the sequence of positions by origin-to-destination of described first fold section.
In rectangle LED reflector of the present invention, first three straightway of described the second broken line and the angle of Z axis are followed successively by 28.5 °, 18.5 °, 8.5 ° according to this straightway in the sequence of positions by origin-to-destination of described the second broken line.
In rectangle LED reflector of the present invention, the angle of the starting point of every straightway of described first fold line segment and the terminal of the line of initial point and this straightway and the line of initial point is 10 °.
In rectangle LED reflector of the present invention, the angle of the starting point of every straightway of first three straightway of described the second broken line and the terminal of the line of initial point and this straightway and the line of initial point is 10 °.
In rectangle LED reflector of the present invention, described d is than the large 1～3mm of the diameter of LED light source.
In rectangle LED reflector of the present invention, described in each, light reflection surface is coated with reflectance coating, and the reflectivity of described reflectance coating is higher than 75%.
In rectangle LED reflector of the present invention, described reflectance coating is aluminium film.
The present invention also provides a kind of LED light fixture, comprises LED light source, also comprises reflector as previously discussed, and described LED light source is positioned at the bottom of described reflector, and the optical axis of described LED light source overlaps with described Z axis.
The present invention also provides another LED light fixture, comprise a plurality of LED light sources, described LED light source is arranged in matrix array, and described in each, LED light source is equipped with a reflector as previously discussed, described LED light source is positioned at the bottom of described reflector, and the optical axis of described LED light source overlaps with described Z axis.
Implement rectangle LED reflector of the present invention, there is following beneficial effect: light reflection surface of the present invention is stretched and formed by broken line, the reflector forming like this can greatly reduce the volume of reflector when meeting the light distribution requirements of floodlighting, and then reduced the volume of LED light fixture, and because the stretching broken line of adjacent reflective surface is different, can realize the light distribution effect of rectangle range of exposures.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing:
Fig. 1 is the schematic diagram of the preferred embodiment of rectangle LED reflector of the present invention;
Fig. 2 is the front view of the preferred embodiment of rectangle LED reflector of the present invention;
Fig. 3 is A-A profile in Fig. 2;
Fig. 4 is B-B profile in Fig. 2;
Fig. 5 is the light path schematic diagram figure of the luminous intensity distribution of LED light fixture of the present invention;
Fig. 6 is the light distribution effect figure of LED light fixture of the present invention;
Fig. 7 is the schematic diagram of LED light fixture of the present invention.
The specific embodiment
The invention provides a kind of reflector, luminous intensity distribution for LED light source, this reflector makes the volume of reflector significantly reduce meeting flood light lamp simultaneously, thereby saving space, make the structure of LED light fixture more compact, volume is less, and this reflector also can also provide the luminous intensity distribution of rectangle range of exposures simultaneously, the more enough light that utilizes more fully light source to send.
Reflector of the present invention has a bottom and a rectangular aperture end, while being used in conjunction with LED light source, LED light source is positioned at the bottom of reflector, and the light part that LED light source sends is directly penetrated by openend, and another part is penetrated by openend after the light reflection surface reflection of reflector.
This reflector comprises four light reflection surfaces that join, be respectively: the first light reflection surface, the second light reflection surface, the 3rd light reflection surface and the 4th light reflection surface, wherein the first light reflection surface and the 3rd light reflection surface are symmetrical, and the second light reflection surface and the 4th light reflection surface are symmetrical, by a broken line, the direction along vertical this broken line place plane forms to broken line two side stretchings the shape of each light reflection surface, the first light reflection surface, the second light reflection surface, the 3rd light reflection surface and the 4th light reflection surface are stretched and are formed by first fold line segment, the second broken line, tri linear section, four fold line segment respectively, first fold line segment comprises that six straightways that are connected successively form, when take the center of end face of bottom of reflector, it is initial point, the symmetry axis of end face of reflector bottom of take is X-axis and Y-axis, vertical this end face of take is pointed to openend direction by initial point is when Z-direction is set up cartesian coordinate system, the starting point of first fold line segment is (0, d/2, 0), wherein d is greater than the diameter of LED light source, every straightway of first fold line segment and the angle of Z axis are 0～39 °, every straightway of first fold line segment and the angle of Z axis are successively decreased by the sequence of positions of origin-to-destination at first fold line segment successively according to this straightway, the angle of the terminal of the starting point of every straightway of first fold line segment and the line of initial point and this straightway and the line of initial point is 5～15 °, the second broken line comprises four straightways that are connected successively, the starting point of the second broken line is (d/2, 0, 0), first three straightway in the second broken line and the angle of Z axis are 8～29 °, first three straightway of the second broken line and the angle of Z axis are successively decreased by the sequence of positions of origin-to-destination at the second broken line successively according to this straightway, the 4th straightway of the second broken line stretches out along the direction of the starting point of four straightways of initial point to the, the starting point of every straightway in first three rule straightway of the second broken line and the angle of the terminal of the line of initial point and this straightway and the line of initial point are 5～15 °, after definite first fold line segment and the second broken line, tri linear section is obtained around Z axis Rotate 180 ° by first fold line segment, and four fold line segment is obtained around Z axis Rotate 180 ° by the second broken line.For the structure of reflector is more compact, d is than the large 1～3mm of the diameter of LED light source, and the degree of depth of reflector is no more than 15mm.
More than introduced reflector of the present invention and how to have designed, for technical characterictic of the present invention, object and effect being had more clearly, understood, now contrasted accompanying drawing and describe the specific embodiment of the present invention in detail.
As shown in Figure 1 to Figure 5, wherein, a preferred embodiment for rectangle LED reflector of the present invention, this reflector 10 comprises four light reflection surfaces that join, be respectively: the first light reflection surface 11, the second light reflection surface 12, the 3rd light reflection surface 13 and the 4th light reflection surface 14, by a broken line, the direction along vertical this broken line place plane forms to broken line two side stretchings each light reflection surface respectively, the first light reflection surface 11, the second light reflection surface 12, the 3rd light reflection surface 13 and the 4th light reflection surface 14 are respectively by first fold line segment 110, the second broken line 120, tri linear section 130 and four fold line segment 140 stretch and form.In the present embodiment, the first light reflection surface 11 and the 3rd light reflection surface 13 are about XOZ plane symmetry, the second light reflection surface 12 and the 4th light reflection surface 14 are about YOZ plane symmetry, therefore as long as determine first fold line segment 110 and the second broken line 120, just can obtain tri linear section 130 and four fold line segment 140.
In this example, first fold line segment 110 comprises six straightways that are connected successively, and these straightways are followed successively by according to the order from origin-to-destination: straightway 111, straightway 112, straightway 113, straightway 114, straightway 115, straightway 116.As described in Fig. 3 and Fig. 4, using the center of bottom of reflector 10 as initial point, the symmetry axis of end face of reflector bottom of take is X-axis and Y-axis, vertical this end face of take is pointed to openend direction by initial point is set up cartesian coordinate system as Z-direction, the starting point S1 of first fold line segment 110, also the starting point S1 coordinate that is straightway 111 is (0, d/2, 0), in the present embodiment, d=8mm, the diameter of the LED light source 20 coordinating with the reflector 10 of the present embodiment is 6mm, here, the diameter of LED light source 20 refers to the diameter of the light-emitting area 21 of LED light source 20, d is advisable to be greater than the diameter 1～3mm of LDE light source 2, unsuitable excessive.
In the present embodiment, the angle of the terminal of the starting point of every straightway of first fold line segment 110 and the line of initial point and this straightway and the line of initial point is 10 °, straightway 111 is 38.5 ° with the angle of Z axis, straightway 112 is 33.5 ° with the angle of Z axis, straightway 113 is 26 ° with Z axis angle, straightway 114 is 23.5 ° with Z axis angle, and straightway 115 is 11 ° with Z axis angle, and straightway 116 is 0 ° with Z axis angle.Angle by starting point, the starting point of straightway 111 and the terminal of the line of initial point and this straightway of straightway 111 and the angle of the line of initial point and straightway 111 and Z axis, these three parameters are decided the coordinate of the terminal that can determine straightway 111, also determined the coordinate of the starting point of straightway 112, the like can determine starting point and the terminal of every straightway, also determine the coordinate of lower first fold line segment 110.After determining lower first fold line segment 110, first fold line segment can be obtained to tri linear section 130 around Z axis Rotate 180 °.
In the present embodiment, the second broken line 120 comprises four straightways that are connected successively, and these straightways are followed successively by according to the order from origin-to-destination: straightway 121, straightway 122, straightway 123, straightway 124.The angle of the starting point of every straightway in first three straightway of the second broken line 120 and the terminal of the line of initial point and this straightway and the line of initial point is 10 °, the 4th straightway 124 of the second broken line 120 stretches out along the direction of the starting point of four straightways 124 of initial point to the, and the Z coordinate of the terminal point coordinate of straightway 124 is identical with the Z coordinate of the terminal of the straightway 116 of first fold line segment 110.The starting point S2 coordinate of straightway 121 is (d/2,0,0), and straightway 121 is 28.5 ° with the angle of Z axis, and straightway 122 is 18.5 ° with the angle of Z axis, and straightway 123 is 8.5 ° with the angle of Z axis, and straightway 124 is 30 ° with the angle of Z axis.By coordinate, the starting point of straightway 121 and the line of initial point of starting point S2 of straightway 121 and the angle of the angle of the terminal of straightway 121 and the line of initial point and straightway 121 and Z axis, these three parameters are decided the coordinate of the terminal that can determine straightway 121, also determined the coordinate of the starting point of straightway 122, the like can determine starting point and the terminal of every straightway, also determine the coordinate of lower the second broken line 120.The second broken line 120 can be obtained to four fold line segment 140 around Z axis Rotate 180 °.
First fold line segment 110, the second broken line 120, tri linear section 130 and four fold line segment 140 form the first light reflection surface 11, the second light reflection surface 12, the 3rd light reflection surface 13 and the 4th light reflection surface 14 along the direction of vertical its place plane to two side stretchings respectively.The degree of depth h of the reflector forming is thus 14mm, the width a of the broadside of openend is 47mm, the width d of bottom is 8mm, the take up space of whole reflector 10 is 16mm * 47mm * 14mm, the existing reflector that is 50mm * 40mm * 20mm with shared space is compared, and has greatly reduced the volume of reflector.
In order to obtain better reflector effect, described in each, light reflection surface is coated with reflectance coating, and the reflectivity of described reflectance coating is higher than 75%.Reflectance coating can aluminium film or other meet other reflectance coatings of reflectivity requirement.
It will be appreciated that, the angle of the line of the starting point of each straightway of the first fold line segment 110 in the present embodiment and the line of initial point and its terminal and initial point is not limited to 10 °, can be 5 ° or 15 °, or the arbitrary value in 5～15 °; Each straightway of first fold line segment 110 and the angle of Z axis do not limit to and above-mentioned occurrence, can within the scope of 0～39 °, adjust, but it should be noted that, reflector closes up, so the angle of each straightway and Z axis successively decreases from the sequence of positions of origin-to-destination at first fold line segment successively according to straightway.Equally, the angle of the line of the starting point of each straightway of first three straightway of the second broken line 120 in the present embodiment and the line of initial point and its terminal and initial point is not limited to 10 °, can be 5 ° or 15 °, or the arbitrary value in 5～15 °; Each straightway of first three straightway of the second broken line 120 and the angle of Z axis do not limit to and above-mentioned occurrence, can within the scope of 8～29 °, adjust.
Light path schematic diagram when Fig. 5 shows reflector 10 of the present invention and coordinates with LED light source 20, LED light source 20 is positioned at the bottom of reflector 10, the center-aligned of the light-emitting area 21 center of LED light source 20 and the end face of bottom, the optical axis of LED light source 20 overlaps with Z axis, and the light-emitting area 21 of LED light source 20 is towards the direction of the openend of reflector 10.The light part that LED light source 20 penetrates is directly penetrated by the openend of reflector 10, most of light is penetrated by the openend of reflector 10 after the reflection of reflector 10, the light that light penetrates towards Z axis one side direction, after reflector reflection, its exit direction is towards the other side direction of Z axis, most of light that LED light source 20 sends mutually intersects after reflector 10 reflections, makes intensity of illumination more even.Referring to Fig. 6, design sketch for luminous intensity distribution, wherein dotted line is the light distribution effect of the second light reflection surface and the 4th light reflection surface, light distribution angle is 100 °, solid line is the light distribution effect of the first light reflection surface and the 3rd light reflection surface, light distribution angle is 40 °, by this figure, can be found out, the light that LED light source 20 sends is after reflector 10 luminous intensity distributions, because the leading portion of the second light reflection surface and the 4th light reflection surface is expanded laterally, form the range of exposures of a rectangle, the light that can more effectively utilize light source to send, its lighting angle is about 40 ° * 100 °, illumination in this region is very even.
As shown in Figure 7, a preferred embodiment for LED light fixture of the present invention, this light fixture has 20 LEDs light sources 20 and lines up 4 * 5 array, each LED light source 20 is equipped with a reflector of the present invention, LED light source 20 is positioned at the bottom of described reflector 10, and the optical axis of LED light source 20 overlaps with described X-axis.It is only 90mm * 148mm * 14mm that the reflector of this light fixture takes up space, and adopt existing reflector, the volume of the reflector of light fixture is at least 215mm * 175mm * 40mm, greatly reduced the volume of light fixture, both reduced the weight of volume and the light fixture of light fixture, also improve the outward appearance of light fixture, reduced the cost of light fixture, there is good practical value and economic implications.
It will be appreciated that, reflector of the present invention is not limited to the application of array, applicable equally for the light fixture of single LEDs light source.
By reference to the accompanying drawings embodiments of the invention are described above; but the present invention is not limited to the above-mentioned specific embodiment; the above-mentioned specific embodiment is only schematic; rather than restrictive; those of ordinary skill in the art is under enlightenment of the present invention; not departing from the scope situation that aim of the present invention and claim protect, also can make a lot of forms, within these all belong to protection of the present invention.
Claims (8)
1. a rectangle LED reflector, the luminous intensity distribution for LED light source, is characterized in that,
Described reflector has a bottom and a rectangular aperture end, described reflector comprises four light reflection surfaces that join, be respectively: the first light reflection surface, the second light reflection surface, the 3rd light reflection surface and the 4th light reflection surface, wherein the first light reflection surface and the 3rd light reflection surface are symmetrical, and the second light reflection surface and the 4th light reflection surface are symmetrical;
Described in each, by a broken line, the direction along vertical this broken line place plane forms to broken line two side stretchings the shape of light reflection surface;
The first light reflection surface, the second light reflection surface are stretched and are formed by first fold line segment, the second broken line respectively;
Described first fold line segment comprises six straightways that are connected successively, when take the center of end face of bottom of reflector, it is initial point, the symmetry axis of end face of reflector bottom of take is X-axis and Y-axis, vertical this end face of take is pointed to openend direction by initial point is when Z-direction is set up cartesian coordinate system, the starting point of described first fold line segment is (0, d/2, 0), wherein d is greater than the diameter of described LED light source, every straightway of described first fold line segment and the angle of Z axis are 0～39 °, every straightway of described first fold line segment and the angle of Z axis are successively decreased by the sequence of positions of origin-to-destination at first fold line segment successively according to this straightway, the angle of the terminal of the starting point of every straightway of described first fold line segment and the line of initial point and this straightway and the line of initial point is 5～15 °,
Described the second broken line comprises four straightways that are connected successively, the starting point of described the second broken line is (d/2, 0, 0), first three straightway in described the second broken line and the angle of Z axis are 8～29 °, first three straightway of described the second broken line and the angle of Z axis are successively decreased by the sequence of positions of origin-to-destination at the second broken line successively according to this straightway, the 4th straightway of described the second broken line stretches out along the direction of the starting point of four straightways of initial point to the, the angle of the starting point of every straightway in first three straightway of described the second broken line and the terminal of the line of initial point and this straightway and the line of initial point is 5～15 °,
Every straightway of described first fold line segment and the angle of Z axis are followed successively by 38.5 °, 33.5 °, 26 °, 23.5 °, 11 °, 0 ° according to this straightway in the sequence of positions by origin-to-destination of described first fold section;
First three straightway of described the second broken line and the angle of Z axis are followed successively by 28.5 °, 18.5 °, 8.5 ° according to this straightway in the sequence of positions by origin-to-destination of described the second broken line.
2. rectangle LED reflector according to claim 1, is characterized in that, the angle of the starting point of every straightway of described first fold line segment and the terminal of the line of initial point and this straightway and the line of initial point is 10 °.
3. rectangle LED reflector according to claim 2, is characterized in that, the angle of the starting point of every straightway of first three straightway of described the second broken line and the terminal of the line of initial point and this straightway and the line of initial point is 10 °.
4. according to the rectangle LED reflector described in claims 1 to 3 any one, it is characterized in that, described d is than the large 1～3mm of the diameter of LED light source.
5. rectangle LED reflector according to claim 4, is characterized in that, described in each, light reflection surface is coated with reflectance coating, and the reflectivity of described reflectance coating is higher than 75%.
6. rectangle LED reflector according to claim 5, is characterized in that, described reflectance coating is aluminium film.
7. a LED light fixture, comprises LED light source, it is characterized in that, also comprises the reflector as described in claim 1 to 6 any one, and described LED light source is positioned at the bottom of described reflector, and the optical axis of described LED light source overlaps with described Z axis.
8. a LED light fixture, comprise a plurality of LED light sources, it is characterized in that, described LED light source is arranged in matrix array, described in each, LED light source is equipped with a reflector as described in claim 1 to 6 any one, described LED light source is positioned at the bottom of described reflector, and the optical axis of described LED light source overlaps with described Z axis.
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| CN201110105807.8A CN102759075B (en) | 2011-04-26 | 2011-04-26 | Rectangular (Light Emitting Diode) reflector and LED light fitting |
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| CN201206781Y (en) * | 2008-03-11 | 2009-03-11 | 保定市大正太阳能光电设备制造有限公司 | LED lamp with reflection cup |
| CN201355001Y (en) * | 2008-12-30 | 2009-12-02 | 上海高柏光电照明有限公司 | LED conjoint reflective cup |
| CN101761894A (en) * | 2009-12-29 | 2010-06-30 | 罗本杰 | Reflecting heat radiation and sealing base of high-power LED light source |
| CN201621619U (en) * | 2010-02-03 | 2010-11-03 | 山西光宇半导体照明有限公司 | Square reflecting shade |
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