CN103615693A - Reflecting type LED automotive headlamp - Google Patents
Reflecting type LED automotive headlamp Download PDFInfo
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- CN103615693A CN103615693A CN201310670240.8A CN201310670240A CN103615693A CN 103615693 A CN103615693 A CN 103615693A CN 201310670240 A CN201310670240 A CN 201310670240A CN 103615693 A CN103615693 A CN 103615693A
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- led chip
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Abstract
The invention discloses a reflecting type LED automotive headlamp which comprises an aluminum substrate, an LED chip installed on the aluminum substrate, and a focusing lens, wherein the LED chip is jointly surrounded by the focusing lens and the aluminum substrate. The reflecting type LED automotive headlamp further comprises a free-form surface reflector arranged on a light source path. Light beams emitted by the LED chip and focused by the focusing lens are completely reflected by the free-form surface reflector. The surface, close to the LED chip, of one side of the focusing lens is a spherical surface, the surface, away from the chip, of one side of the focusing lens is a free-form surface, after lambert light beams emitted by the LED chip pass through the focusing lens, outgoing beam-divergence angles are smaller, and light intensity areas in all directions are the same. The number of spare and accessory parts of the reflector of the headlamp is small, the headlamp is simple and stable in structure and convenient to install, light distribution requirements can be met without light barriers, optical energy loss of a system is reduced, the utilization rate of the optical energy is improved, meanwhile the reflector occupies small space, and a higher degree of freedom is provided for overall layout of an automobile.
Description
Technical field
The invention belongs to illuminating engineering application, be specifically related to a kind of reflecting LED car headlamp.
Background technology
In recent years, along with the continuous innovation of LED chip, encapsulation technology, LED chip is not only confined to small-power product, and it is just towards high-power development.Due to the advantage of LED self, national product every field has been goed deep in LED illumination, and such as street lamp, indoor lamp, Landscape Lamp etc., the maturation application in these fields, has pushed automobile lamp ranks to LED again.
The bright prospects in market must be brought the variation of demand: in actual applications, independent LED can not meet our needs, therefore we are incompatible for LED light source tailors oneself light distributing system according to applied field, meet the requirement of vapour Vehicular LED headlamp < < GB25991-2010 > >.
At present, according to the method for designing of dipped headlights, mostly trend towards the combination of ellipsoid reflector and lens, ellipsoid has two focuses, a part of structure that car light adopts ellipsoid as reflector, shadow shield be positioned at first focus of ellipsoid, lens are positioned at second focus, belong to more original method, a lot of conventional light source just adopt this structure, some LED car light also has this structure of employing, this kind of structure is not only complicated and take up room large, again because dipped headlights and high beam also each has the light-source chamber of oneself by oneself, the space taking is larger, for the moulding of automobile is made troubles.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of reflecting LED car headlamp, headlight reflectors spare and accessory parts provided by the invention are few, simple and stable structure, be convenient to install, and do not need light barrier just can meet light distribution requirements, and reduced the luminous energy loss of system, improved the utilization rate of luminous energy, simultaneously this reflector take up room little, for the integral layout of automobile provides the larger free degree.
For achieving the above object, technical scheme of the present invention is as follows:
A reflecting LED car headlamp, comprising:
One aluminium base, one is installed on the LED chip on aluminium base, and a condenser lens, and described condenser lens and aluminium base surround LED chip jointly;
Also comprise that one is arranged at the free-form surface reflector in source path, the light beam that described free-form surface reflector sends the LED chip of line focus lens light gathering reflects completely.
In a preferred embodiment of the invention, it is sphere that described condenser lens approaches LED chip one side surface, a side surface away from chip is free form surface, lambert's type light beam that LED chip sends is through after condenser lens, the outgoing beam angle of divergence is less, and the luminous intensity region in all directions equates.
In a preferred embodiment of the invention, the region that described condenser lens medial surface light beam passes through is coated with anti-reflection film, and at the peripheral annular section of described condenser lens, scribbles pitch-darkly, described pitch-dark for absorbing veiling glare, prevents from causing light pollution for luminous intensity distribution below.
In a preferred embodiment of the invention, described free-form surface reflector is comprised of a plurality of smooth free form surface close-packed arrays.
In a preferred embodiment of the invention, described LED chip is selected high power lambert type LED chip.
In a preferred embodiment of the invention, on described aluminium base, be provided with the fin laminated structure that plays thermolysis.
By technique scheme, the invention has the beneficial effects as follows:
Headlight reflectors spare and accessory parts provided by the invention are few, simple and stable structure, be convenient to install, and do not need light barrier just can meet light distribution requirements, reduced the luminous energy loss of system, improved the utilization rate of luminous energy, simultaneously this reflector take up room little, for the integral layout of automobile provides the larger free degree.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is structural representation of the present invention.
Fig. 2 a is the front view of condenser lens; Fig. 2 b is condenser lens top view.
Fig. 3 is that the light beam of collector lens outgoing of the present invention is along the perspective view on LED chip axis direction free-form surface mirror.
Fig. 4 is the perspective view of luminous intensity distribution plane in national standard of the present invention.
Fig. 5 a is the exploded view in the single region of reflecting surface of the present invention, and Fig. 5 b is the perspective view of Fig. 5 a.
The specific embodiment
For technological means, creation characteristic that the present invention is realized, reach object and effect is easy to understand, below in conjunction with concrete diagram, further set forth the present invention.
With reference to Fig. 1, a kind of reflecting LED car headlamp, comprising:
One aluminium base 1, is installed on the LED chip 2 on aluminium base, and a condenser lens 3, and condenser lens 3 and aluminium base 1 surround LED chip 2 jointly;
Also comprise that one is arranged at the free-form surface reflector 4 in source path, the light beam that free-form surface reflector 4 sends the LED chip 2 of line focus lens 3 optically focused reflects completely.
The region that condenser lens 3 medial surface light beams pass through is coated with anti-reflection film, and at the peripheral annular section of described condenser lens, scribbles pitch-darkly, described pitch-dark for absorbing veiling glare, prevents that luminous intensity distribution from causing light pollution.
Fig. 2 a is the front view of condenser lens, the outermost light beam that the chip of selecting when light 01,02 is design condenser lens sends, the beam section that two light are folded, it is a conical region, be to provide the beam section of illumination, this light beam the lens area of process need to plate anti-reflection film, in fact, light 01,02 still has with the folded region of horizontal plane the light beam that chip sends passes through, and these light beams do not participate in illumination, and therefore on condenser lens, japanning absorbs.
Fig. 2 b is condenser lens top view, the conical surface that in the circle corresponding diagram 2a of inner side, light 01,02 produces along optical axis rotation and the intersection of condenser lens outer surface, peripheral annular section shown in shaded area is.
Free-form surface reflector 4 is comprised of a plurality of smooth free form surface close-packed arrays.
Described LED chip 2 is selected high power lambert type LED chip; On described aluminium base 1, be provided with the fin laminated structure that plays thermolysis.
The effect of condenser lens is to converge lambert's type light beam that LED chip sends, as much as possible the larger light beam of the angle of divergence is applied in illumination, if this is due to without condenser lens, in the light beam that chip sends, the light of the larger angle of emergence can not freedom of entry curved reflector in, if utilize more light beam by the larger light distributing system of design, out rear size is larger also will to cause Random Curved Surface Designing.
The utilization rate that has both increased luminous energy that adds of condenser lens has also reduced veiling glare simultaneously, be unlikely to have influence on luminous intensity distribution below, and the free-form surface mirror size adopting is also little, has so also reduced the size of fitting structure.
Convenient for the design of free-form surface mirror below, consider to allow condenser lens play the effect of uniform light illumination simultaneously, allow light beam after the focusing on luminous intensity in all directions equate.
Can profit design with the following method condenser lens:
Making the face near LED chip side on condenser lens is plane, with seasonal described plane and LED chip distance, is certain certain value, definition polar coordinates, and these polar coordinates be take the LED chip centre of luminescence as initial point, and the chip outgoing beam optical axis of take is Z axis, utilizes
represent chip outgoing beam
light beam in direction, determines after condenser lens material and can utilize the law of refraction to obtain light beam
through the direction of propagation after condenser lens plane
This direction
it is equally also the incident direction of condenser lens chip outer surface.Equally, can utilize the law of refraction to obtain the incident direction of condenser lens chip outer surface
and exit direction
between relation.
Utilize the feature of lambert's body luminous intensity
And the feature of the condenser lens luminous intensity that goes out to establish
Can set up the light beam that LED chip sends
the light beam that goes out to establish with condenser lens
between corresponding relation, utilize iterative method can draw the face type shape of convergent lens.
The light of condenser lens outgoing is through the final luminous intensity distribution plane that arrives of free-form surface mirror reflection, and need to obtain qualified light distribution, according to national standard, the light type in luminous intensity distribution plane should produce obvious "cut-off"line, left side is horizontal line, and right side is the 15 ° of oblique lines that raise up.(as Fig. 4)
Want the to gain freedom face type shape of curved reflector, need to set up the corresponding model of speculum incident beam direction and outgoing beam direction.
Here be circular light type and the corresponding relation between the light type in national standard, the namely usually said subregion that will set up condenser lens outgoing.
Utilize the rectangle that several width different in size are equal circular light type to be divided into a plurality of regions that are illustrated in fig. 3 shown below:
In Fig. 3, circular light type be the light beam of collector lens outgoing along the projection on LED chip axis direction free-form surface mirror, and the combination of strip rectangle is the subregion to reflecting surface.And actual what play reflection ray effect is the common ground of rectangle combination zone and border circular areas.In Fig. 3,11-18 rectangular area is all divided into again upper and lower two regions.
With reference to Fig. 4, the light type of luminous intensity distribution plane in national standard is defined as:
Wherein 21,22,23,26 regions are rectangular area, and 24,25 regions are trapezoid area, and hypotenuse and horizontal angle are 15 °.
In luminous intensity distribution, 12,13,14,15, the light beam of 16,17 regional reflexs finally completes successively to 21,22, and 23,24, the luminous intensity distribution in 25,26 regions, considers in national standard and in 24,25 regions, requires there are enough illuminance, and to 24 and 25, carry out additional illumination respectively by 11 and 18.
With reference to Fig. 5 a, Fig. 5 b, illustrates the corresponding relation of reflecting surface region and luminous intensity distribution plane domain, and Fig. 5 a selects 15 regions of reflecting surface, and corresponding luminous intensity distribution plane 24 regions (Fig. 5 b) describe,
Line segment more than 35 the combination of four rectangles be first region in 15 regions in Fig. 3, and 35 downside rectangles are combined as second region in 15 regions.
And trapezoidal 24 regions that are combined as in Fig. 4 in Fig. 5 b, and the horizontal oblique line section in the 41-45 presentation graphic in figure, the light reflecting through region 15 finally forms the hot spot in region 24,
On line segment 35, the light of reflection completes the luminous intensity distribution on corresponding line segment 41, line segment 34,36 corresponding line segments 42, line segment 33,37 corresponding line segments 43, the corresponding line segment 44 of line segment 32,38, line segment 31,39 corresponding line segments 45, significantly, the lateral longitudinal in 15 regions is to the corresponding longitudinally line segment in side in corresponding 24 regions of line segment, so just realized the corresponding relation of reflecting surface subregion and luminous intensity distribution plane subregion, in Practical Calculation, need to further segment corresponding region, divide thinner, the reflecting surface calculating is more accurate, and the light conditions of luminous intensity distribution plane more meets with design.
Why reflecting surface be divided into upper and lower two regions and thrown light on (being divided into upper and lower twoth district as 11) in luminous intensity distribution plane region, because in experience, collector lens carries out the prewired light time to LED chip, the light of near axis area can relatively easily complete light distribution requirements, with design conditions meet fine, axle exterior domain light is because the reason of various errors departs from initial designing requirement to a certain extent, and in national standard, requirement to "cut-off"line is stricter, consider the light with near axis area, it is line segment 35, realization is also the luminous intensity distribution of line segment 41 to dead line.
Equally, for reflecting surface and the luminous intensity distribution plane in other regions, also can utilize said method to carry out correspondence, be the special case of above-mentioned trapezoidal situation such as the rectangle situation in the regions such as 21.
So just set up the some point correspondence of reflecting surface and luminous intensity distribution plane, the relative position of recycling reflecting surface and luminous intensity distribution plane, can set up the corresponding situation of reflecting surface incident ray and reflection ray, finally utilize the law of refraction can complete the calculating to free form surface reflecting surface face type.
More than show and described basic principle of the present invention and principal character and advantage of the present invention.The technical staff of the industry should understand; the present invention is not restricted to the described embodiments; that in above-described embodiment and description, describes just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.The claimed scope of the present invention is defined by appending claims and equivalent thereof.
Claims (6)
1. a reflecting LED car headlamp, is characterized in that, comprising:
One aluminium base, one is installed on the LED chip on aluminium base, and a condenser lens, and described condenser lens and aluminium base surround LED chip jointly;
Also comprise that one is arranged at the free-form surface reflector in source path, the light beam that described free-form surface reflector sends the LED chip of line focus lens light gathering reflects completely.
2. a kind of reflecting LED car headlamp according to claim 1, it is characterized in that: it is sphere that described condenser lens approaches LED chip one side surface, a side surface away from chip is free form surface, lambert's type light beam that LED chip sends is through after condenser lens, the outgoing beam angle of divergence is less, and the luminous intensity region in all directions equates.
3. a kind of reflecting LED car headlamp according to claim 1, it is characterized in that: the region that described condenser lens medial surface light beam passes through is coated with anti-reflection film, and scribble pitch-dark at the peripheral annular section of described condenser lens, described pitch-dark for absorbing veiling glare, prevent from causing light pollution for luminous intensity distribution below.
4. a kind of reflecting LED car headlamp according to claim 1, is characterized in that: described free-form surface reflector is comprised of a plurality of smooth free form surface close-packed arrays.
5. a kind of reflecting LED car headlamp according to claim 1, is characterized in that: described LED chip is selected high power lambert type LED chip.
6. a kind of reflecting LED car headlamp according to claim 1, is characterized in that: on described aluminium base, be provided with the fin laminated structure that plays thermolysis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310670240.8A CN103615693A (en) | 2013-12-11 | 2013-12-11 | Reflecting type LED automotive headlamp |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310670240.8A CN103615693A (en) | 2013-12-11 | 2013-12-11 | Reflecting type LED automotive headlamp |
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| Publication Number | Publication Date |
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| CN103615693A true CN103615693A (en) | 2014-03-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310670240.8A Pending CN103615693A (en) | 2013-12-11 | 2013-12-11 | Reflecting type LED automotive headlamp |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104949024A (en) * | 2014-03-27 | 2015-09-30 | 丽清汽车科技(上海)有限公司 | Lateral-projection total-reflection LED car lamp |
| CN106555952A (en) * | 2016-11-16 | 2017-04-05 | 南京东晖光电有限公司 | A kind of hyperboloid transmission-type LED blackboard lights of application classroom illumination |
| CN108302485A (en) * | 2017-09-13 | 2018-07-20 | 上海小糸车灯有限公司 | Car light intelligent illuminating system, vehicle lamp assembly and automobile |
| CN108302445A (en) * | 2016-08-28 | 2018-07-20 | 常州星宇车灯股份有限公司 | The full LED distance light lamp module of high efficiency smart matrix form |
| CN111664417A (en) * | 2019-03-08 | 2020-09-15 | 常州星宇车灯股份有限公司 | Flat LED short-distance beam module |
| CN111664416A (en) * | 2019-03-08 | 2020-09-15 | 常州星宇车灯股份有限公司 | Flat LED (light-emitting diode) high beam module |
| CN117781212A (en) * | 2024-02-27 | 2024-03-29 | 珠海科亮智能光电有限公司 | Modular LED car lamp and car lamp assembly |
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| CN102213389A (en) * | 2010-04-12 | 2011-10-12 | 市光工业株式会社 | Vehicle headlamp |
| CN202813157U (en) * | 2012-08-16 | 2013-03-20 | 重庆雷本光电科技有限公司 | Light-emitting diode (LED) automotive headlamp |
| CN202938206U (en) * | 2012-08-09 | 2013-05-15 | 重庆雷本光电科技有限公司 | Light-emitting diode (LED) automobile headlamp |
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2013
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102213389A (en) * | 2010-04-12 | 2011-10-12 | 市光工业株式会社 | Vehicle headlamp |
| CN202938206U (en) * | 2012-08-09 | 2013-05-15 | 重庆雷本光电科技有限公司 | Light-emitting diode (LED) automobile headlamp |
| CN202813157U (en) * | 2012-08-16 | 2013-03-20 | 重庆雷本光电科技有限公司 | Light-emitting diode (LED) automotive headlamp |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104949024A (en) * | 2014-03-27 | 2015-09-30 | 丽清汽车科技(上海)有限公司 | Lateral-projection total-reflection LED car lamp |
| CN108302445A (en) * | 2016-08-28 | 2018-07-20 | 常州星宇车灯股份有限公司 | The full LED distance light lamp module of high efficiency smart matrix form |
| CN106555952A (en) * | 2016-11-16 | 2017-04-05 | 南京东晖光电有限公司 | A kind of hyperboloid transmission-type LED blackboard lights of application classroom illumination |
| CN108302485A (en) * | 2017-09-13 | 2018-07-20 | 上海小糸车灯有限公司 | Car light intelligent illuminating system, vehicle lamp assembly and automobile |
| CN111664417A (en) * | 2019-03-08 | 2020-09-15 | 常州星宇车灯股份有限公司 | Flat LED short-distance beam module |
| CN111664416A (en) * | 2019-03-08 | 2020-09-15 | 常州星宇车灯股份有限公司 | Flat LED (light-emitting diode) high beam module |
| CN117781212A (en) * | 2024-02-27 | 2024-03-29 | 珠海科亮智能光电有限公司 | Modular LED car lamp and car lamp assembly |
| CN117781212B (en) * | 2024-02-27 | 2024-04-30 | 珠海科亮智能光电有限公司 | Modular LED car lamp and car lamp assembly |
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Application publication date: 20140305 |
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