CN105841062B - Light-emitting diode headlight - Google Patents
Light-emitting diode headlight Download PDFInfo
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- CN105841062B CN105841062B CN201510473540.6A CN201510473540A CN105841062B CN 105841062 B CN105841062 B CN 105841062B CN 201510473540 A CN201510473540 A CN 201510473540A CN 105841062 B CN105841062 B CN 105841062B
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- 230000003287 optical effect Effects 0.000 claims abstract description 43
- 230000005540 biological transmission Effects 0.000 claims description 5
- 238000013461 design Methods 0.000 abstract description 2
- 230000017525 heat dissipation Effects 0.000 abstract 3
- 238000005265 energy consumption Methods 0.000 abstract 1
- 229910052736 halogen Inorganic materials 0.000 description 9
- 150000002367 halogens Chemical class 0.000 description 9
- 230000003760 hair shine Effects 0.000 description 5
- 230000003137 locomotive effect Effects 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 239000000571 coke Substances 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000009738 saturating Methods 0.000 description 2
- 238000004220 aggregation Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 238000012938 design process Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000004020 luminiscence type Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
Abstract
A light emitting diode headlight comprises a lens, a heat dissipation seat and two light emitting diodesPole tube module and mask. The heat dissipation seat is located on the optical axis of the lens, and the light emitting diode module is located in the direction of the optical axis of the lens and arranged on the heat dissipation seat. The distance between the light emitting diode module and the lens is larger than the distance between the focal point of the lens and the lens. The light shielding plate is positioned on the focal plane of the lens and selectively shields part of light rays of the light emitting diode module, wherein the light emitting diode module is provided with a light emitting surface, and a maximum distance is reserved between certain two points on the light emitting surface. The maximum distance and the focal length of the lens substantially satisfy: 0.0351FL≦L≦0.7279FLIn which F isLthe LED headlamp has the advantages that the energy consumption is low due to the design, and the size of the headlamp is further reduced.
Description
Technical field
The invention relates to a kind of light emitting diode headlight.
Background technology
Currently, in the headlight of locomotive or automobile, still using traditional halogen bulb (Halogen lamp) as shining
Source.When halogen bulb shines, light type can to all the winds dissipate.Therefore, when designing the headlight of locomotive or automobile, it is necessary to
Elliptical reflecting cup is set inside headlight.There are one focuses after front focus and one for elliptical reflecting cup.Halogen bulb can be set
It sets in front focus, and by elliptical reflecting cup by the light-ray condensing of halogen bulb to rear focus.Then, rear focus is gathered
Light can be gone out by lens projects, to achieve the purpose that illumination.
However, halogen bulb service life is short and luminous efficiency is low, and the most energy of halogen bulb is converted into thermal energy,
Cause headlight internal temperature excessively high.In addition, because of the presence of headlight internal reflection cup so that the volume of headlight can not be small
Type.Therefore, with the development of other luminescence technologies, such as high intensity discharge (High-Intensity Discharge,
HID) light bulb and light emitting diode (Light Emitting Diode, LED) light bulb etc., have gradually replaced halogen bulb, have answered
In headlight.For LED bulb is steeped compared to HID lamp again, LED bulb more power saving and driving voltage is low, reaction speed
Soon, manufacturing cost is low.Therefore, traditional halogen bulb is replaced using LED, has been increasingly becoming the trend of market development.
Invention content
The purpose of the present invention is to provide a kind of light emitting diode headlight.
According to one or more embodiments of the invention, light emitting diode headlight includes lens, radiating seat, at least one luminous two
Pole pipe module and barn door.Lens have focal length and focal plane, and wherein focal plane is by the focuses of lens and perpendicular to saturating
The optical axis of mirror.Radiating seat be located on the direction of optical axis and radiating seat between lens at a distance from be more than focus between lens at a distance from.
Light-emitting diode (LED) module is located on the direction of optical axis and is set on radiating seat, and light-emitting diode (LED) module between lens at a distance from
More than focus between lens at a distance from.Barn door is located on focal plane, and the light-emitting diodes of barn door selectively shield portions
The light of tube module, wherein light-emitting diode (LED) module have light-emitting surface, certain point-to-point transmission on light-emitting surface has a maximum distance.This
The focal length of maximum distance and lens substantially meets：0.0351FL≦L≦0.7279FL, wherein FLFor the focal length of lens, L is most
Big distance.
According to one or more embodiments of the invention, the emergent light of the luminous full-shape of above-mentioned light-emitting diode (LED) module is flat by coke
The intersection point in face is linked to be an imaginary line with owner's plane of lens and the intersection point of optical axis.Have half to interlock between this imaginary line and optical axis
Angle.The distance between this half alternate angle, the focal length of lens, maximum distance, focal plane and light-emitting diode (LED) module and luminous two
The luminous half-angle of pole pipe module substantially meets：2FLTan θ=L+2dtan θL, wherein θ is half alternate angle, θLFor light emitting diode
Luminous half-angle, the d of module are the distance between focal plane and light-emitting diode (LED) module.
According to one or more embodiments of the invention, the distance between above-mentioned focal plane and light-emitting diode (LED) module are less than or wait
In the focal length of 1/5th lens.
According to one or more embodiments of the invention, the distance between above-mentioned focal plane and light-emitting diode (LED) module meet：
(2FLtanθ-L)/2tan65°≦d≦(2FLtanθ-L)/2tan55°。
According to one or more embodiments of the invention, the luminous half-angle of above-mentioned light-emitting diode (LED) module is between about 55 degree to about 65
Between degree.
According to one or more embodiments of the invention, above-mentioned half alternate angle is about 20 degree.
According to one or more embodiments of the invention, the focal range of said lens is between about 44.5 millimeters and about 57.5 millimeters
Between.
According to one or more embodiments of the invention, the numerical aperture (Numerical Aperture, NA) of said lens is situated between
Between about 0.5 to about 0.55.
According to one or more embodiments of the invention, wherein the direction of the optical axis along lens, above-mentioned light-emitting diode (LED) module
Light go out via lens projects and expose to a perspective plane after, the luminous intensity of the optical axis of lens and the intersection on perspective plane is small
In or equal to 1700 candle lights.
According to one or more embodiments of the invention, wherein the direction of the optical axis along lens, the light of light-emitting diode (LED) module
After line goes out via lens projects and exposes to a perspective plane, the luminous intensity of the optical axis of lens and the intersection on perspective plane be more than or
Equal to 5100 candle lights.
According to one or more embodiments of the invention, on above-mentioned perspective plane, light-emitting diode (LED) module is via lens projects
Light has dead line.It is 15 degree to have inclination angle, this inclination angle between dead line and horizontal line.
According to one or more embodiments of the invention, light emitting diode headlight includes lens, radiating seat, at least one luminous two
Pole pipe module and barn door.Lens have focal length and focal plane, and wherein focal plane is by the focuses of lens and perpendicular to saturating
The optical axis of mirror.Radiating seat be located on the direction of optical axis and radiating seat between lens at a distance from be more than focus at a distance from lens.Hair
Optical diode module is located on the direction of optical axis and is set on radiating seat, and light-emitting diode (LED) module between lens at a distance from it is big
At a distance from focus is between lens.Barn door is located on focal plane, and the light emitting diode of barn door selectively shield portions
The light of module.The emergent light of the luminous full-shape of light-emitting diode (LED) module is and flat with the owner of lens by the intersection point of focal plane
The intersection point of face and optical axis is linked to be an imaginary line, has half alternate angle between this imaginary line and optical axis.Focal plane and LED die
The distance between block meets：(2FLtanθ-L)/2tan65°≦d≦(2FLTan θ-L)/2tan55 °, wherein FLFor the coke of lens
Be half alternate angle away from, θ, d is the distance between focal plane and light-emitting diode (LED) module, L is the light-emitting surface of light-emitting diode (LED) module
Certain point-to-point transmission maximum distance.
In conclusion the light emitting diode headlight of one or more embodiments of the invention uses light-emitting diode (LED) module conduct
Light emitting source, energy expenditure are relatively low.In addition, the light-emitting surface of light-emitting diode (LED) module is towards lens, therefore reflector need not be passed through
Reflection light can further reduce the volume of light emitting diode headlight.
Description of the drawings
Fig. 1 is the stereogram of the light emitting diode headlight of one embodiment of the invention；
Fig. 2 is the side view schematic of Fig. 1；
Fig. 3 is the part position relational graph of the light emitting diode headlight of one embodiment of the invention；
Fig. 4 is the light type figure of the light emitting diode headlight of one embodiment of the invention；
Fig. 5 is the light type figure of the light emitting diode headlight of another embodiment of the present invention.
Specific implementation mode
Multiple embodiments of the present invention, as clearly stated, the details in many practices will be disclosed with attached drawing below
It will be explained in the following description.It should be appreciated, however, that the details in these practices is not applied to limit the present invention.Also
It is to say, in some embodiments of the present invention, the details in these practices is non-essential.In addition, for the sake of simplifying attached drawing, one
A little known usual structures will be painted in a manner of simply illustrating in the accompanying drawings with element.
About word used herein " substantial (substantially) ", " about (around) ", " about
(about) " or " intimate (approximately) " should be meaned generally within 20 the percent of given value or range, compared with
Good is within 10, and is more preferably then within 5 percent.Wen Zhongruo without clearly stating, mentioned by numerical value all
Regard as approximation, i.e. error or range as represented by " substantial ", " about ", " about " or " intimate ".
Following embodiments are to disclose a kind of light emitting diode headlight, since the light that light-emitting diode (LED) module is sent out can be straight
The lens transmitting towards light emitting diode headlight is connect, therefore the light emitting diode headlight in following embodiments can be saved instead
Penetrate the structure of cup so that the volume-diminished of entire light emitting diode headlight.
Fig. 1 is the stereogram of the light emitting diode headlight 100 of one embodiment of the invention, and Fig. 2 is the side view outline of Fig. 1
Figure, wherein Fig. 2 is the shape for each component for being simply painted Fig. 1, is not painted according to actual ratio or shape.As shown,
Light emitting diode headlight 100 includes at least a light-emitting diode (LED) module 110, radiating seat 120, lens 130 and barn door
140.Lens 130 have optical axis OA, focal length FL, focus f, focal plane FP and owner plane PP, mid-focal length FLFor lens 130
Owner's plane PP and lens 130 the distance between focus f, and focal plane FP be by the focus f of lens 130 and perpendicular to
The optical axis OA of lens 130.Radiating seat 120 is set on the direction of optical axis OA, and between radiating seat 120 and lens 130 away from
From DHLMore than the distance between focus f and lens 130 d '.Light-emitting diode (LED) module 110 is set on the direction of optical axis OA, and is sent out
Optical diode module 110 is set on radiating seat 120.The distance between light-emitting diode (LED) module 110 and lens 130 DLLMore than coke
The distance between point f and lens 130 d ', and in the present embodiment, if seeing it by the direction of vertical radiating seat 120, light-emitting diodes
Tube module 110 has light-emitting surface 112.Barn door 140 is located on the FP of focal plane, and barn door 140 optionally shelters from portion
The light of the light-emitting diode (LED) module 110 divided.When barn door 140 shelters from the light of light-emitting diode (LED) module 110, luminous two
The light that pole pipe headlight 100 is sent out can have dead line after exposing to a perspective plane (such as ground).Dead line is light-emitting diodes
The boundary of daylight and dark place after the light of pipe headlight 100 shines out can avoid the light that light emitting diode headlight 100 is sent out
Line is to causing the harm of dazzle with passerby.
Thus, by Fig. 1 and Fig. 2's it is found that light that light-emitting diode (LED) module 110 is sent out by light-emitting surface 112 because
With the characteristic more concentrated, thus the light-emitting surface 112 of light-emitting diode (LED) module 110 can directly facing lens 130, without
Install the part (such as reflector) of reflection or aggregation light additional in light emitting diode headlight 100.Therefore, the present embodiment is luminous
The volume of diode headlight 100 can be reduced accordingly, to meet the trend of future market.
Fig. 3 is the part position relational graph of the light emitting diode headlight 100 of one embodiment of the invention, and wherein Fig. 3 is province
The barn door 140 being slightly painted in Fig. 1 and Fig. 2.Please also refer to Fig. 1 to Fig. 3, on the light-emitting surface 112 of light-emitting diode (LED) module 110
Certain point-to-point transmission can have maximum distance L.In the present embodiment, maximum distance L can be the light-emitting surface of light-emitting diode (LED) module 110
The distance between opposite end point on 112, and the focal length F of maximum distance L and lens 130LSubstantially meet：0.0351FL≦L
≦0.7279FL.Thus, the light luminance that light emitting diode headlight 100 is sent out just may conform to the requirement of regulation, such as
The law stendard of the Economic Commission for Europe (Economic Commission for Europe, ECE) of European Union.
For example, Fig. 4 is the light type figure of the light emitting diode headlight 100 of one embodiment of the invention.As shown,
In the present embodiment, the light that the light-emitting surface 112 of light-emitting diode (LED) module 110 is sent out projects away via lens 130, and by away from
From DPRAnd after exposing to perspective plane RP, on perspective plane, the light type S1 of RP can be as shown in figure 4, be approximately a semicircle.Specifically answering
Used time is lighted, and distance D if light-emitting diode (LED) module 110 has a circular luminous face with 33 volts, 450 milliamperesPRFor
25 meters, then the luminous intensity specification of the luminous intensity of different test points and European Union ECE for the dipped headlight of locomotive on the RP of perspective plane
Can be as shown in " table one ", the wherein position of test point 7 big slightly the optical axis OA of lens 130 and the perspective plane intersections RP.
Table one
By " table one " it is found that the light that the light emitting diode headlight 100 of the present embodiment is sent out expose to 25 meters it is remote
After the RP of perspective plane, luminous intensity specifications of the European Union ECE for the dipped headlight of locomotive may conform to.
Fig. 5 is the light type figure of the light emitting diode headlight 100 of another embodiment of the present invention.As shown, the present embodiment
The place being different from the embodiment of fig. 4 is that light-emitting diode (LED) module 110 is incident upon the light on the RP of perspective plane via lens 130
Type S2 has dead line CL.Dead line CL is the friendship of daylight and dark place after the light of light emitting diode headlight 100 shines out
Boundary can be formed by barn door 140 (with reference to figure 1 and Fig. 2).In the 5 embodiment of figure 5, on the RP of perspective plane with horizontal line HL with
Vertical line VL is divided into four quadrants, and dead line CL is located in first quartile, and can have between dead line CL and horizontal line HL
Tiltangleθi, the light that avoidable light emitting diode headlight 100 is sent out with passerby to causing the harm such as dazzle.In concrete application
When, the tiltangleθ between dead line CL and horizontal line HLi15 degree are about, but invention is not limited thereto.
Then, please also refer to " table two " and Fig. 5." table two " is European Union ECE surveys different on the RP of perspective plane
In pilot, the light emitting diode headlight 100 of luminous intensity specification and this case for the dipped headlight of automobile is in each test point
Luminous intensity test result.In " table two ", the light emitting diode headlight 100 of the present embodiment is with 35 volts, 1 ampere of point
It is bright, and the distance between perspective plane RP and lens 130 DPRIt is 25 meters, the wherein test point 50V slightly optical axis of lens and throwings greatly
The position of the intersection in shadow face.
Table two
By " table two " it is found that the light that the light emitting diode headlight 100 of the present embodiment is sent out expose to 25 meters it is remote
After the RP of perspective plane, luminous intensity specifications of the European Union ECE for the dipped headlight of automobile may conform to.
Then, Fig. 3 is gone back to.In one embodiment, 2 θ of luminous full-shape of light-emitting diode (LED) module 110LEmergent light with
Focal plane FP intersects at intersection point A1, and the owner's plane PP and optical axis OA of lens 130 intersect at intersection point A2, and intersection point A1 and A2 can be linked to be
Imaginary line B.As shown in figure 3, the alternate angle between this imaginary line B and optical axis OA is 2 θ (i.e. folded between imaginary line B and optical axis OA
Angle).Therefore, half alternate angle between imaginary line B and optical axis OA is θ.If in addition, focal plane FP and light-emitting diode (LED) module
The distance between 110 be d, luminous half-angle (the i.e. full width at half maximum (FWHM) of light-emitting diode (LED) module 110 of light-emitting diode (LED) module 110
1/2 angle) it is θL.The then focal length F of lens 130L, certain 2 points maximum distance on the light-emitting surface 112 of light-emitting diode (LED) module 110
L, the luminous half angle θ of light-emitting diode (LED) module 110LAnd half alternate angle θ substantially meet：
2FLTan θ=L+2dtan θL (1)。
Above-mentioned relation formula (1) can be obtained by the total side of the triangle of the both sides focal plane FP in Fig. 3.As shown in figure 3,
FLTan θ=L/2+dtan θL, by equal sign both sides, multiplying twice can be obtained 2F togetherLTan θ=L+2dtan θL.Thus, pass through
The relationship of relational expression (1) can design the light emitting diode headlight 100 for meeting laws and regulations requirement.
Please continue to refer to Fig. 3.In one embodiment, the distance between focal plane FP and light-emitting diode (LED) module 110 d essence
Upper satisfaction：
0≦d≦FL/5 (2)。
If the upper limit of relational expression (2) and lower limit are substituted into relational expression (1), you can respectively obtain L=2FLTan θ and L
=2FLtanθ-(2FL/5)tanθL.At this point, the maximum distance on the light-emitting surface 112 of light-emitting diode (LED) module 110 between certain 2 points
L substantially meets：
2FLtanθ-(2FL/5)tanθL≦L≦2FLtanθ (3)。
Thus, by relational expression (3), the maximum on the light-emitting surface 112 of light-emitting diode (LED) module 110 between certain 2 points
Distance L need to only pass through the focal length F of lens 130LAnd half alternate angle θ, shine half angle θLIt determines, so as to simplifying light emitting diode vehicle
The design process of head lamp 100, while the light emitting diode headlight 100 for meeting laws and regulations requirement can be produced again.In addition, luminous two
The distance between pole pipe module 110 and focal plane FP d≤FL/ 5, therefore the body of entire light emitting diode headlight 100 can be reduced
Product.
More specifically, in one embodiment, light-emitting diode (LED) module 110 meets Lan Shi reflectors (Lambertian
Reflectance characteristic), shine half angle θLBetween about 55 degree to about 65 degree.More specifically, LED die
The luminous half angle θ of block 110L60 degree are about, therefore tan θ can be obtainedLIt is approximately equal to 1.732.In addition, in order to meet European Union ECE
Laws and regulations requirement, half alternate angle θ is about 20 degree, therefore tan θ can be obtained and be approximately equal to 0.364.If at this point, by tan θLIt is equal to
1.732 and tan θ are equal to 0.364 and substitute into relational expression (3), you can obtain 0.0351FL≦L≦0.7279FL。
In the above-described embodiment, the distance between light-emitting diode (LED) module 110 and focal plane FP d≤F are limitedL/5.So
And if LED light-source module 110 is located at when on the focal plane FP of lens 130 (d=0), it is easy to cause luminous two
Small light-emitting diode chip for backlight unit is clearly imaged in pole pipe light source module 110, causes light type taste bad.Therefore, at this
In the another embodiment of invention, the distance between focal plane FP and light-emitting diode (LED) module 110 d can meet following relationship：
(2FLtanθ-L)/2tan65°≦d≦(2FLtanθ-L)/2tan55° (4)。
More specifically, tan θ can be obtained in above-mentioned relational expression (1)L=(2FLtanθ-L)/2d.Therefore, it shines
The luminous half angle θ of diode (led) module 110LFollowing relationship can be met：
θL=tan-1[(2FLtanθ-L)/2d] (5)。
If light-emitting diode (LED) module 110 meets the characteristic of Lan Shi reflectors (Lambertian reflectance), send out
The luminous half angle θ of optical diode module 110LBetween about 55 degree to about 65 degree, if therefore by luminous half angle θLIt is 55 degree
(55 °) and 65 degree (65 °) substitute into relational expression (5) respectively, can obtain 55 °≤tan-1[(2FLtanθ-L)/2d]≦65°.I.e.
tan55°≦(2FLTan θ-L)/2d≤tan65 °, therefore relational expression (4) can be obtained.By the limitation in relational expression (4), can keep away
Exempt from light-emitting diode (LED) module 110 to be too close to or on the focal plane FP of lens 130, and generates that light type grade is bad to ask
Topic.
More specifically, referring to FIG. 3, in relational expression (4), half alternate angle θ shines with light-emitting diode (LED) module 110
Half angle θLIt is related.Therefore, by relational expression (4) it is found that passing through focal length of lens FL, light-emitting diode (LED) module 110 112 ruler of light-emitting surface
The Lan Shi reflectors of very little (i.e. certain 2 points maximum distance L on light-emitting surface 112) and light-emitting diode (LED) module 110
The characteristic of (Lambertian reflectance), so that it may to define the defocus range of a light-emitting diode (LED) module 110 (i.e.
The distance between focal plane FP and light-emitting diode (LED) module 110 d) so that present embodiment can not be done at surface in lens 130
In the case of reason, more broad soft light type is sent out.
In product practical application, the focal length F of lens 130LRange can be between 44.5 millimeters and about 57.5 millimeters, thoroughly
The numerical aperture (Numerical Aperture, NA) of mirror 130 is between about 0.5 to about 0.55.Thus, above-mentioned one or
Light emitting diode headlight 100 disclosed by multiple embodiments, because being used as light emitting source using light-emitting diode (LED) module 110, because
This energy expenditure is relatively low.In addition, the light emitting diode headlight 100 disclosed by one or more above-mentioned embodiments is not required to plus tradition
Reflector be that can reach the requirements of vehicle (locomotive or automobile) lighting regulations, small volume and be conducive to space utilization, meet
The trend of future market development.
Although the present invention has been disclosed by way of example above, it is not intended to limit the present invention., any to be familiar with this those skilled in the art,
Without departing from the spirit and scope of the present invention, when can be used for a variety of modifications and variations, therefore protection scope of the present invention is when regarding
Subject to the scope of which is defined in the appended claims.
Claims (11)
1. a kind of light emitting diode headlight, which is characterized in that include：
One lens, have a focal length and a focal plane, wherein the focal plane by a focus of the lens and perpendicular to this thoroughly
One optical axis of mirror；
One radiating seat, be located on the direction of the optical axis and the radiating seat be more than with the lens at a distance from the focus and the lens away from
From；
An at least light-emitting diode (LED) module on the direction of the optical axis and is set on the radiating seat, the LED die
Block is more than the focus at a distance from the lens at a distance from the lens；And
One barn door is located on the focal plane, selectively the light of the light-emitting diode (LED) module of shield portions；
Wherein, which there is a light-emitting surface, certain point-to-point transmission of the light-emitting surface to have a maximum distance, the maximum
Distance and the focal length of the lens substantially meet：
0.0351FL≦L≦0.7279FL；
Wherein FLFor the focal length of the lens, L is the maximum distance,
The intersection point of the emergent light and the focal plane of the luminous full-shape of the light-emitting diode (LED) module, with owner's plane of the lens with
The intersection point of the optical axis is linked to be an imaginary line, has half alternate angle, half alternate angle, the lens between the imaginary line and the optical axis
The distance between the focal length, the maximum distance, the focal plane and the light-emitting diode (LED) module and the light-emitting diode (LED) module
Luminous half-angle substantially meets：
2FLTan θ=L+2dtan θL；
Wherein θ is half alternate angle, the θLLuminous half-angle, d for the light-emitting diode (LED) module are the focal plane and the light emitting diode
The distance between module.
2. light emitting diode headlight according to claim 1, which is characterized in that the focal plane and the LED die
The distance between block is less than or equal to the focal length of 1/5th lens.
3. light emitting diode headlight according to claim 1, which is characterized in that the focal plane and the LED die
The distance between block meets：
(2FLtanθ-L)/2tan65°≦d≦(2FLtanθ-L)/2tan55°。
4. light emitting diode headlight according to claim 1, which is characterized in that luminous the half of the light-emitting diode (LED) module
Angle is between about 55 degree to about 65 degree.
5. light emitting diode headlight according to claim 1, which is characterized in that half alternate angle is about 20 degree.
6. light emitting diode headlight according to claim 1, which is characterized in that the focal range of the lens is between about
Between 44.5 millimeters and about 57.5 millimeters.
7. light emitting diode headlight according to claim 1, which is characterized in that the numerical aperture of the lens is between about
Between 0.5 to about 0.55.
8. light emitting diode headlight according to claim 1, which is characterized in that along the side of the optical axis of the lens
After going out via the lens projects to the light of, the light-emitting diode (LED) module and expose to a perspective plane, the optical axis of the lens
It is less than or equal to 1700 candle lights with the luminous intensity of the intersection on the perspective plane.
9. light emitting diode headlight according to claim 1, which is characterized in that along the side of the optical axis of the lens
After going out via the lens projects to the light of, the light-emitting diode (LED) module and expose to a perspective plane, the optical axis of the lens
It is greater than or equal to 5100 candle lights with the luminous intensity of the intersection on the perspective plane.
10. light emitting diode headlight according to claim 9, which is characterized in that on the perspective plane, the light-emitting diodes
Tube module has a dead line via the light of the lens projects, has an inclination angle between the dead line and a horizontal line, should
Inclination angle is 15 degree.
11. a kind of light emitting diode headlight, which is characterized in that include：
One lens, have a focal length and a focal plane, wherein the focal plane by a focus of the lens and perpendicular to this thoroughly
One optical axis of mirror；
One radiating seat, be located on the direction of the optical axis and the radiating seat be more than with the lens at a distance from the focus and the lens away from
From；
An at least light-emitting diode (LED) module on the direction of the optical axis and is set on the radiating seat, the LED die
Block is more than the focus at a distance from the lens at a distance from the lens；And
One barn door is located on the focal plane, selectively the light of the light-emitting diode (LED) module of shield portions；
The wherein intersection point of the emergent light and the focal plane of the luminous full-shape of the light-emitting diode (LED) module is flat with an owner of the lens
Face and the intersection point of the optical axis are linked to be an imaginary line, have half alternate angle between the imaginary line and the optical axis；
Wherein, the distance between the focal plane and the light-emitting diode (LED) module meet：
(2FLtanθ-L)/2tan65°≦d≦(2FLTan θ-L)/2tan55 °, wherein FLThe focal length, θ for the lens be this half
Alternate angle, d are the distance between the focal plane and the light-emitting diode (LED) module, and L is a light-emitting surface of the light-emitting diode (LED) module
Certain point-to-point transmission a maximum distance.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW104102866 | 2015-01-28 | ||
| TW104102866 | 2015-01-28 | ||
| TW104118968 | 2015-06-11 | ||
| TW104118968A TWI554713B (en) | 2015-01-28 | 2015-06-11 | Light emitting diode headlight |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105841062A CN105841062A (en) | 2016-08-10 |
| CN105841062B true CN105841062B (en) | 2018-08-31 |
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