The nearly distance light one of car headlamp LED P ES unitTechnical field
The present invention relates to a kind of car headlamp distance-light one light emitting diode (LED) PES unit,Belong to car light design field.
Background technology
For the headlight of nearly distance light one, conventional nearly road function switching mode has two kinds: magnetic valveSwitch shadow shield and fixed nontransparent shadow shield.
The defect that adopts magnetic valve to switch the scheme of shadow shield is that cost is high, volume is large, weight is large, meritCan switch time, noise is large.
The defect that adopts fixed nontransparent shadow shield is that dividing plate exists certain thickness, becomes for nearly distance lightThe boundary of picture can cause obvious seam, forms the filaments of sun, affects Driver Vision and experiences. Concrete ginsengSee Fig. 1, dipped beam light a is through the focal position of lens, and light is parallel with optical axis after lens, nearLight light b is without lens focus position, with the joining of optical axis before lens focus, so light warpCrossing after lens is diffusing light, not can with optical axis intersection, other dipped beam light can be blocked by dividing plate, noCan be through lens. And all distance light light is due to stopping of dividing plate, all similar with dipped beam light b,After lens, be diffusing light, not can with optical axis intersection. Distance light light because of the thickness of dividing plate head formerCause, cannot scioptics focus, therefore dipped beam light and the shooting angle of distance light light after lensHave the angular interval of a vacancy, cause dipped beam and distance light division to be come, connect thereby cause significantlySeam, forms the filaments of sun, affects Driver Vision and experiences.
Summary of the invention
The technical issues that need to address of the present invention are: existing car headlamp distance-light one luminous twoUtmost point pipe (LED) PES unit, or adopt magnetic valve to switch the scheme of shadow shield, causes that cost is high, bodyLong-pending large, weight large, function while switching noise large; Or adopting fixed nontransparent shadow shield, dividing plate is depositedAt certain thickness, can cause obvious seam for the boundary of nearly distance light imaging, form the filaments of sun, shadowRinging Driver Vision experiences.
The present invention takes following technical scheme:
A kind of car headlamp distance-light one LED P ES unit, comprises dividing plate 2, transparent screeningTabula rasa 4, lens 5, dipped beam LED, distance light LED; The rectangular body of described transparent shadow shield 4, arrangesIn nearly lens one side of dividing plate 2, the upper surface of its upper surface and dividing plate 2 is concordant or approach concordant; ThoroughlyThe focus of mirror 5 is positioned on the upper surface of described transparent shadow shield 4; Described dipped beam LED is positioned at distance light LEDTop; The light Part I of described dipped beam LED transmitting is sheltered from by dividing plate 2, and Part II is penetratedOn transparent shadow shield 4 upper surfaces and due to the less formation total reflection of incidence angle, cut thereby form dipped beamPrincipal vertical line; The light of described distance light LED transmitting is through transparent shadow shield 4, because the larger realization of incidence angle is saturatingPenetrate, after lens reflection, form directional light through the light of lens focus, when distance-light is switched,Between nearly distance light light type, realize seamless link.
Further, the light Part II of dipped beam LED transmitting is penetrated transparent shadow shield 4 upper surface shapesBecome total reflection, and at the inner multiple total reflection that forms of transparent shadow shield 4.
Further, the surface treatment of dividing plate 2 is that dermatoglyph adds and aluminizes, and realizing increases light efficiency or softening is assortedThe effect of astigmatism.
A kind of car headlamp distance-light one LED P ES unit, described car headlamp is far awayDipped beam one LED P ES unit does not arrange dividing plate, and the lateral dimension of transparent shadow shield 4 reachesEnough thickness, makes the light that is located at transparent shadow shield 4 rear portions, upper surface all realize total reflection, fromShut out the light and can reach equally, form the effect of dipped beam dead line.
Beneficial effect of the present invention is:
1) avoid using magnetic valve to switch shadow shield, reduce costs, reduced volume, weight reduction, keeps awayExempt from the noise producing when function is switched.
2) due to the effect of transparent shadow shield, the boundary of nearly distance light imaging can not cause seam, eliminatesThe filaments of sun, have promoted Driver Vision, make driver have better road surface and drive experience.
3) be skillfully constructed, cost is lower, and it is convenient to implement.
4) surface treatment of dividing plate is that dermatoglyph adds and aluminizes, and realizes the effect that increases light efficiency or softening veiling glare.
Brief description of the drawings
Fig. 1 is the car headlamp distance-light one of the fixed nontransparent shadow shield of available technology adoptingStructure and the light efficiency schematic diagram of light emitting diode (LED) PES unit.
Fig. 2 is the structure of car headlamp distance-light one light emitting diode of the present invention (LED) PES unitAnd light efficiency schematic diagram.
In figure, dipped beam light in a. background technology, another dipped beam light, 1. dipped beam in b. background technologyLight, 2. dividing plate, 3. distance light light, 4. transparent shadow shield.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is further described.
Embodiment mono-:
Referring to Fig. 2, a kind of car headlamp distance-light one LED P ES unit, comprise dividing plate 2,Transparent shadow shield 4, lens 5, dipped beam LED, distance light LED; The rectangular body of described transparent shadow shield 4, establishesPut nearly lens one side at dividing plate 2, the upper surface of its upper surface and dividing plate 2 is concordant or approach concordant; ThoroughlyThe focus of mirror 5 is positioned on the upper surface of described transparent shadow shield 4; Described dipped beam LED is positioned at distance light LED'sTop; The light Part I of described dipped beam LED transmitting is sheltered from by dividing plate 2, and Part II is penetrated thoroughlyOn bright shadow shield 4 upper surfaces and due to the less formation total reflection of incidence angle, thereby form dipped beam dead line;
Do not run into the dipped beam light that transparent shadow shield stops, after projecting lens, will form dipped beam light type.And run into the dipped beam light that transparent shadow shield stops, will enter transparent shadow shield from the top of shadow shieldInner. Due to the effect of total reflection, this part light will be from the outgoing of shadow shield below, and cannot enterEnter lens, so just can form dipped beam dead line.
The light of described distance light LED transmitting, through transparent shadow shield 4, is realized transmission because incidence angle is larger,Light through lens focus forms directional light after lens reflection, when distance-light is switched, closely far awayBetween light light type, realize seamless link.
This programme utilizes the principle of light transmission and total reflection, and dipped beam light and distance light light can be distinguishedThrough lens focus, can make to realize seamless link between nearly distance light light type.
Referring to Fig. 2, the light Part II of dipped beam LED transmitting is penetrated in transparent shadow shield 4 upper surfaces and is formedTotal reflection, and at the inner multiple total reflection that forms of transparent shadow shield 4.
The surface treatment of dividing plate 2 is that dermatoglyph adds and aluminizes, and realizes the effect that increases light efficiency or softening veiling glare.
Embodiment bis-:
The light of dipped beam system mainly concentrates near lens focus, and the effect of dividing plate is to stop dipped beam systemLight unnecessary in system enters from shadow shield right side, and dipped beam light type is caused to veiling glare. If shadow shieldThickness enough long, can comprise all dipped beam incident raies, can cancel dividing plate. So adopt withLower embodiment:
A kind of car headlamp distance-light one LED P ES unit, described car headlamp is far awayDipped beam one LED P ES unit does not arrange dividing plate, and the lateral dimension of transparent shadow shield 4 reachesEnough thickness, makes the light that is located at transparent shadow shield 4 rear portions, upper surface all realize total reflection, fromShut out the light and can reach equally, form the effect of dipped beam dead line.
The present invention had both avoided heavy mechanical type shadow shield, had also avoided fixing nontransparent shadow shieldThe nearly distance light light type causing separates, and the sound when having eliminated nearly road function completely and switching.
The magnetic valve scheme that the present invention is more present, reduced cost, reduced weight, reduced volume,The sound while having eliminated nearly distance light switching, fixed nontransparent shadow shield is compared, and has improved nearly distance light lightLinking between type, makes driver have better road surface effect and experiences.