CN101423040A - Vehicle lamp - Google Patents
Vehicle lamp Download PDFInfo
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- CN101423040A CN101423040A CNA2008101842177A CN200810184217A CN101423040A CN 101423040 A CN101423040 A CN 101423040A CN A2008101842177 A CNA2008101842177 A CN A2008101842177A CN 200810184217 A CN200810184217 A CN 200810184217A CN 101423040 A CN101423040 A CN 101423040A
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- light
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- luminosity
- light area
- light beam
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/60—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution
- F21S41/63—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on refractors, filters or transparent cover plates
- F21S41/635—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on refractors, filters or transparent cover plates by moving refractors, filters or transparent cover plates
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
- F21S41/25—Projection lenses
- F21S41/255—Lenses with a front view of circular or truncated circular outline
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Lighting Device Outwards From Vehicle And Optical Signal (AREA)
Abstract
A vehicle lamp (LHL,RHL) is arranged to switch between a low beam and a high beam. The high beam illuminates a first illumination area (SA1), which lies ahead of and square to a center of a vehicle, and a second illumination area (SA2), which includes portions lying horizontally further leftwards and right wards and vertically further upwards than the first illumination area (SA1). When switching from the low beam to the high beam, the luminous intensity of the second illumination area (SA2) is increased and thereafter the luminous intensity of the first illumination area (SA1) is increased. When switching from the high beam to the low beam, the luminance intensity of the first illumination area (SA1) is decreased and thereafter the luminance intensity of the second illumination area (SA2) is decreased.
Description
Technical field
The present invention relates to the headlight for automobile (headlight) of a kind of automobile etc., particularly a kind of vehicle lamp that can switch travel light beam and the light beam of giving another the right of way.
Background technology
The head lamp of automobile constitutes and can switch the travel light beam and the light beam of giving another the right of way, wherein, the light beam that travels is used to illuminate a distant place, front, give another the right of way light beam over there car or driving earlier wait other automobile storage situation under, prevent from other vehicle drivers are caused the place ahead of dazzling the eyes sense and this car that throws light on.Yet, in the travel light beam and the light beam of giving another the right of way, mainly the throw light on positive zone of vehicle of the light beam that travels, relative therewith, the beam lighting of giving another the right of way removes nearby square regional the positive zone of vehicle, both light distribution patterns differ widely, therefore, when switching, the illuminating position in this car the place ahead has big variation, bring inharmonious sense for this car driver, perhaps in safety traffic, have problems.For example, switching to from the light beam that travels when giving another the right of way light beam, because state from the wide zone in this car the place ahead of throwing light on high luminosity, become with the luminosity lower this car state in side zone nearby that only throws light on than the luminosity of the light beam that travels, therefore, reach front region deepening far away around this car the place ahead, cause this car driver's visuality to reduce, bring uneasy sense for this car driver.In addition, switching to from the light beam of giving another the right of way when travelling light beam, to other vehicles irradiations that can not carry out around this car that this car of adequate illumination driver can not confirm because of the light beam of giving another the right of way and be in the place ahead far away light beam that travels, these other vehicle drivers are caused dazzle the eyes sense, in safety traffic, have problems.
At this type of problem, in patent documentation 1, a kind of technical scheme has been proposed, promptly can control the optical axis direction of the light beam of giving another the right of way, measure this car and the first vehicle headway of driving,, dazzle the eyes sense thereby prevent from driving driver earlier caused according to the vehicle headway deflect on the optical axis of light beam of will giving another the right of way, on the other hand, also improved this car driver's distant place visuality.In addition, in patent documentation 2, another kind of technical scheme has been proposed, promptly utilize vehicle detection apparatus to detect other vehicles, based on the relative distance of other vehicles, control the light quantity of the driving beam and the passing beam of left and right sides head lamp independently, dazzle the eyes sense, improve the place ahead visuality of this car driver thereby elimination causes other vehicle drivers.
Patent documentation 1: TOHKEMY 2002-19517 communique
Patent documentation 2: TOHKEMY 2004-161082 communique
Technology according to patent documentation 1, though illumination by the light beam of giving another the right of way, can improve the visuality in this car driver's a distant place, but can not eliminate in switching and travel light beam and described car driver existing when giving another the right of way light beam feels inharmonious sense, perhaps can not solve to prevent from reliably other vehicle drivers are caused the problem of dazzling the eyes sense.In addition, technology according to patent documentation 2, though when will the travel light beam and the light beam of giving another the right of way shine other vehicles respectively, can prevent from other vehicle drivers are caused and dazzle the eyes sense, can carry out appropriate illumination, but, do not solve in the inharmonious sense that light beam is travelled in switching and the described driver that exists when giving another the right of way light beam feels, the perhaps problem of dazzling the eyes the sense aspect that other vehicle drivers are caused.
Summary of the invention
The purpose of this invention is to provide a kind of vehicle lamp, can improve, prevent from the driver is caused inharmonious sense, on the other hand, also can prevent from other vehicle drivers are caused and dazzle the eyes sense at the switching transition condition of light beam when giving another the right of way light beam that travel.
The present invention constitutes the vehicle lamp that can switch the give another the right of way light beam and the light beam that travels, it is characterized in that, the light beam that travels to throw light on the 1st light area and the 2nd light area, the 1st light area is the positive central authorities of vehicle, and the 2nd light area comprises than the keep left top of horizontal direction of right both sides, the 1st light area; The control setup of turning on light that the state of turning on light of vehicle lamp is controlled, switching to from the light beam of giving another the right of way when travelling light beam, after increasing the luminosity of the 2nd light area, increase the luminosity of the 1st light area, switching to from the light beam that travels when giving another the right of way light beam, after reducing the luminosity of the 1st light area, reduce the luminosity of the 2nd light area.
According to the present invention, switching to from the light beam of giving another the right of way when travelling light beam, illuminate the peripheral region in this car the place ahead at first by the luminosity that increases by the 2nd light area, then illuminate the positive zone of this car up to zone, a distant place, illuminate the All Ranges in this car the place ahead at last with regulation luminosity by the luminosity that increases by the 1st light area.Thus, this car front region can not illuminate suddenly, can not bring inharmonious sense to the driver.On the other hand,, only reduce the luminosity of the 1st light area at first, reduce the luminosity of the 2nd light area afterwards again, extinguish the illumination of the 1st light area and the 2nd light area at last, only throw light on the sealed beam lamp of giving another the right of way switching to from the light beam that travels when giving another the right of way light beam.Therefore, even in the illumination deepening in the positive zone of this car, also can guarantee the bright illumination of peripheral region, the illumination of peripheral region afterwards continues deepening, so prevent the unexpected deepening of the illumination of this car the place ahead and even peripheral region, can not bring inharmonious sense for the driver, thus the situation that in safety traffic, can not take place not expect.
Description of drawings
Fig. 1 is an expression integrally-built diagram of block of the present invention;
Fig. 2 is the section-drawing of general configuration of the head lamp of expression embodiment 1;
Fig. 3 (a) and (b) are give another the right of way figure of light distribution patterns of light beam and the light beam that travels of expression;
Fig. 4 is used to illustrate the diagram of circuit that switches the light beam action;
The figure of light distribution patterns when Fig. 5 (a)~(c) is the switching light beam of expression embodiment 1;
Fig. 6 is the diagram of circuit that is used to illustrate the switching light beam action of embodiment 2;
Fig. 7 is the section-drawing of general configuration of the head lamp of expression embodiment 3;
The figure of light distribution patterns when Fig. 8 (a) and (b) are switching light beams of expression embodiment 3;
Fig. 9 is the section-drawing of general configuration of the head lamp of expression embodiment 4;
Figure 10 is the section-drawing of general configuration of the head lamp of expression embodiment 5;
The figure of light distribution patterns when Figure 11 (a)~(d) is the switching light beam of expression embodiment 5;
Figure 12 is the section-drawing of general configuration of the head lamp of expression embodiment 6;
The figure of light distribution patterns when Figure 13 (a)~(c) is the switching light beam of expression embodiment 6;
The figure of the light distribution patterns when Figure 14 (a)~(c) is the switching light beam of variation of expression embodiment 6;
Figure 15 is the diagram of circuit that is used to illustrate the control of illumination action of embodiment 7;
Figure 16 (a)~(c) is the characteristic map that is used to illustrate the control table of embodiment 7 and variation;
Figure 17 is the vehicle headway of expression embodiment 7 and the relevant sequential chart of illumination condition.
Description of reference numerals
RHL, LHL: head lamp, RLBL, LLBL: the sealed beam lamp of giving another the right of way, RHBL, LHBL: the sealed beam lamp that travels, ECU: the control setup of turning on light, LSW: light switch, BSW: beam-switching, FMD: front vehicles detecting device, LBP: the light distribution patterns of the light beam of giving another the right of way, HBP*: the light distribution patterns of the light beam that travels, SA1: the 1st light area, SA2: the 2nd light area.
The specific embodiment
In the present invention, preferred structure is to have the front vehicles detecting device that detects the vehicle that is present in this car the place ahead, when the vehicle headway between and the front vehicles detected by the front vehicles detecting device reaches the 1st predetermined distance when above, the control setup of turning on light is controlled switching to the light beam that travels from the light beam of giving another the right of way.During the place ahead more than the place ahead automobile storage is the 1st predetermined distance,, can not cause yet and dazzle the eyes sense, on the other hand, can guarantee this car front region of throwing light on brightly, guarantee safety traffic the front vehicles driver even switch to the light beam that travels.In this case, the control setup of turning on light reaches the 1st predetermined distance when above at the vehicle headway with front vehicles, only increases the luminosity of the 2nd light area, is reaching 2nd predetermined distance bigger than the 1st predetermined distance when above, increases the luminosity of the 1st light area.Thus, not only prevent from the front vehicles driver caused and dazzle the eyes sense, and,, therefore, can prevent from this car driver is caused inharmonious sense from increasing luminosity to the front on every side when the light beam that travels switches.
Perhaps, it is characterized in that, have the front vehicles detecting device that detects the vehicle that is present in this car the place ahead, the control setup of turning on light is controlled at the luminosity of above-mentioned the 1st light area or the 2nd light area the luminosity of the vehicle headway setting of and front vehicles detected based on the front vehicles detecting device.When the vehicle headway that keeps regulation continues to travel, the 1st, the 2nd light area is controlled at the luminosity that is suitable for this vehicle headway most, prevent from the one hand the front vehicles driver caused and dazzle the eyes sense, improve the visuality in the place ahead of this car driver on the other hand.
In the present invention, the 2nd light area is defined as the annular section that surrounds the 1st light area, perhaps be defined as the zone, the left and right sides of the 1st light area, perhaps be defined as the arbitrary region of the upper-side area of the 1st light area, therefore, can prevent from this car driver is caused inharmonious sense, can guarantee this car front region of throwing light on brightly again, guarantee safety traffic.
Embodiment 1
Below, embodiments of the invention 1 are described.Fig. 1 is the integrally-built figure of expression, about head lamp LHL, RHL be connected on the control setup ECU that turns on light, also be connected with the light switch LSW and beam-switching (dimmer switch (デ ィ マ one ス イ ッ the チ)) BSW that carry out switch (ONOFF) operation by the driver.Switch the light beam that travels (country beam) of each head lamp LHL, RHL and the light beam of giving another the right of way (passing light) by this beam-switching BSW.In addition, at not shown automotive front, be provided with and be used to detect the front vehicles detecting device FMD that the opposite car that is present in this car front region or driving earlier wait other vehicles, according to the detection output of this front vehicles detecting device FMD, the above-mentioned control setup ECU that turns on light can control turning on light of above-mentioned each head lamp LHL, RHL.
Above-mentioned left and right sides head lamp LHL, RHL are that its inner structure is a left-right symmetric and other structures are identical, and the what is called 4 lamp formula structures of travel sealed beam lamp RHBL, LHBL and give another the right of way sealed beam lamp LLBL, RLBL are housed in respectively in each lampshade LH.Fig. 2 is the figure of the general configuration of expression right headlamp RHL, is contained in the structure of the sealed beam lamp RHBL that travels in the lampshade LH in showing.In addition because the sealed beam lamp RLBL that gives another the right of way still uses existing lamp, so omit its explanation at this, when turning on light shown in Fig. 3 (a), the illumination of the light beam light distribution patterns LBP that gives another the right of way in the zone, side nearby in this car the place ahead of throwing light on.Above-mentioned lampshade LH is by front openings and the front lens 12 making container-like lamp body 11 and be installed in the front openings of this lamp body 11 are constituted.As shown in Figure 2, the sealed beam lamp RHBL that travels has the catadioptre 13 of making paraboloid of revolution body (parabola), disposes the H1 light source in the focal position of this catadioptre 13, is disposing light source H2 than the forward slightly side of this H1 light source.The so-called H4 bulb 14 of two filaments is housed in this uses integratedly, with the R filament 141 of these H4 bulb 14 rear sides as above-mentioned H1 light source, with the F filament 142 of front side as above-mentioned H2 light source.In addition, the upper-side area at above-mentioned F filament 142 is provided with the interior shade 14a that shading is used.Though when using as two lamp formula light sources with H4 bulb 14, interior shade 14a is installed on the catadioptre in the mode towards F filament 142 downsides usually,, shade 14a is mounted in the mode towards F filament 142 upsides in this.The sealed beam lamp LHBL that travels of left headlamp LHL also has same structure.
In this head lamp RHL, LHL, when if unlatching R filament 141 is the H1 light source, the light of catadioptre 13 reflections is to be in substantially parallel relationship to the beam emissions of optical axis Lx, and by front lens 12 optically focused, form the light distribution patterns HBP1 of the 1st light area SA1 that throws light on as Fig. 3 (b) shown in, the 1st light area SA1 is the zone of vehicle front central portion of horizontal direction of the left and right directions central authorities of this car.In addition, be the H2 light source if open F filament 142, because the light that penetrates towards the top is by interior shade 14a shading, therefore be reflected mirror 13 reflections and of the light that only penetrates towards the place ahead towards the below.Therefore, shown in Fig. 3 (b), form the light distribution patterns HBP2 of illumination the 2nd light area SA2, the 2nd light area SA2 is than keep left zone top, that constitute semi-annular shape of horizontal direction of right both sides of above-mentioned the 1st light area SA1.So, these light distribution patterns HBP1 and HBP2 is overlapping, become the light beam light distribution patterns HBP that travels.
As shown in Figure 1, above-mentioned front vehicles detecting device FMD has the pick up camera CAM and the pattern recognition device VP of solid-state imagers such as using CCD or MOS, this pattern recognition device VP carries out the image that this pick up camera CAM takes signal conditioning and carries out image analysis, front vehicles such as opposite car that is in this car the place ahead in the identification image pickup scope or driving earlier detect front vehicles and the distance between this car (vehicle headway) that is identified in view of the above.If information based on the front vehicles of this detection, detection signal is exported to the above-mentioned control setup ECU that turns on light, promptly the give another the right of way light beam and the light beam that travels of this control setup ECU that turns on light state of turning on light of switching above-mentioned head lamp RHL, LHL based on this detection signal then, and then respectively the light-off state that switches to the state of turning on light when travelling light beam and switch to when giving another the right of way light beam is controlled.In addition, this front vehicles detecting device FMD can be made of other devices such as millimeter wave radars, gets final product so long as can detect the device of the vehicle headway of this car and front vehicles.
The above-mentioned control setup ECU that turns on light is when opening above-mentioned light switch LSW, to above-mentioned head lamp RHL, LHL supply capability and turn on light.At this moment, according to the switching state of above-mentioned beam-switching BSW, control the turning on light or turning off the light of give another the right of way sealed beam lamp RLBL, LLBL and travel sealed beam lamp RHBL, LHBL of above-mentioned head lamp RHL, LHL.Just, beam-switching BSW is switching to when giving another the right of way light beam, only opens give another the right of way sealed beam lamp RLBL, LLBL, switching to when travelling light beam, opens give another the right of way sealed beam lamp RLBL, LLBL and travel sealed beam lamp RHBL, LHBL simultaneously.In addition, the above-mentioned control setup ECU that turns on light also can turning on light or turning off the light and control above-mentioned give another the right of way sealed beam lamp RLBL, LLBL and travel sealed beam lamp RHBL, LHBL based on the detection signal from above-mentioned vehicle detection apparatus FMD.Further, turn on light control setup ECU particularly control travel turning on light of sealed beam lamp RHBL, LHBL or turn off the light when, can control to the H1 light source 141 of travel sealed beam lamp RHBL, LHBL and H2 light source 142 respectively during supply capability and the opportunity of turning on light and turning off the light when cutting off electric power independently.For example, carry out the supply of electric power and stop, in view of the above, each illumination of being undertaken by H1 light source 141 and H2 light source 142 is brightened or deepening through specified time.
According to above structure, such shown in diagram of circuit among Fig. 4, the switch LSW (S11) if the driver turns on the light, the control setup ECU that turns on light only opens give another the right of way sealed beam lamp RLBL, LLBL (S12).Thus, become the illumination of the light distribution patterns LBP shown in Fig. 5 (a), thrown light in the nearby square zone of this car.On the other hand,, turn on light control setup ECU on being given another the right of way in the basis of sealed beam lamp RLBL, LLBL in unlatching, open travel sealed beam lamp RHBL, LHBL (S14) again if driver's operational light beam switch BSW switches to (S13) when travelling light beam.The control setup ECU that turns on light turns on light by H1 light source 141 and H2 light source 142 to the sealed beam lamp that travels, thereby form shown in Fig. 5 (c), on the basis of the light distribution patterns LBP that forms by give another the right of way sealed beam lamp RLBL, LLBL, the luminous intensity distribution HBP2 of the 2nd light area SA2 of the luminous intensity distribution HBP1 of the 1st light area SA1 of H1 light source 141 and H2 light source 142 is overlapping, form the luminous intensity distribution of the light beam that travels.If beam-switching BSW is closed and switch to the light beam of giving another the right of way (S15), the control setup ECU that turns on light only turns off the light (S16) to travel sealed beam lamp RHBL, LHBL, turn back to shown in Fig. 5 (a) luminous intensity distribution.
At this, switching to the step S14 of the light beam that travels from the light beam of giving another the right of way, the control setup ECU that turns on light is that H1 light source 141 and H2 light source 142 are turned on light to the R filament 141 and the F filament 142 of the sealed beam lamp that travels respectively, controls the state of turning on light of two light sources this moment independently.Just, the control setup ECU that turns on light only turns on light to H2 light source 142 initial, increase the luminosity (S141) of the 2nd light area SA2, then H1 light source 141 is turned on light, increase the luminosity (S142) of the 1st light area SA1, at last respectively with luminosity throw light on the 1st light area SA1 and the 2nd light area SA2 of regulation.In addition, though in step S16, close beam-switching BSW and when turning back to the light beam of giving another the right of way from the luminous intensity distribution of the light beam that travels, the control setup ECU that turns on light turns off the light to the sealed beam lamp that travels, and switches to the luminous intensity distribution of the light beam of only giving another the right of way, but initial is turned off the light to H1 light source 141, reduce the luminosity (S161) of the 1st light area SA1, then H2 light source 142 is turned off the light, reduce the luminosity (S162) of the 2nd light area SA2, at last the 1st light area SA1 and the 2nd light area SA2 are turned off the light.
As previously mentioned, switching to from the light beam of giving another the right of way when travelling light beam, because the initial luminosity that increases by the 2nd light area SA2, so as Fig. 5 (b) shown in, the light distribution patterns that formation is made of the light distribution patterns HBP2 of the light distribution patterns LBP of the light beam of giving another the right of way and the 2nd light area.In the process of switching to this light distribution patterns, the peripheral region in this car the place ahead brightens at first.Then, by increasing the luminosity of the 1st light area SA1, shown in Fig. 5 (c), form the overlapping light distribution patterns that the light distribution patterns HBP1 of the 1st light area SA1 is arranged, the positive zone of this car brightens, and finally becomes the luminous intensity distribution of the light beam that travels.Therefore,, this car front region is brightened suddenly, can not cause inharmonious sense the driver when the light beam that travels switches.In addition, owing to brighten successively from the peripheral region to positive zone, so, suppose that the driver does not find out under the situation of opposite car or driving earlier, time point in its way can be confirmed other vehicles, therefore carve the switching that can stop immediately at that time, prevent from advance other vehicles are caused and dazzle the eyes sense to the light beam that travels.
On the other hand, switching to from the light beam that travels when giving another the right of way light beam, transform to the light quantity that shown in Fig. 5 (b), only reduces the 1st light area SA1 at first from the light distribution patterns of the light beam that travels shown in Fig. 5 (c), reduce the luminosity of the 2nd light area SA2 afterwards again, at last the light distribution patterns LBP that forms by the sealed beam lamp of giving another the right of way shown in Fig. 5 (a) that the 1st light area SA1 and the 2nd light area SA2 are turned off the light.Therefore, in the light distribution patterns shown in Fig. 5 (b) on the way, even in the illumination deepening in the positive zone of this car, also can guarantee the bright illumination of peripheral region, afterwards, because the illumination deepening gradually of peripheral region, so, can prevent the unexpected deepening of illumination of this car the place ahead and even peripheral region, thereby can not occur bringing uneasy sense and causing in safety traffic, having problems to the driver.In addition, can not bring inharmonious sense to the driver.
Embodiment 2
In embodiment 1, though the beam-switching BSW by driver operation the give another the right of way light beam and the light beam that travels are switched,, in embodiment 2, based on the detection output of front vehicles detecting device FMD, the light beam and the light beam that travels switch to giving another the right of way.Shown in diagram of circuit among Fig. 6, if when turning on the light switch LSW (S21), give another the right of way sealed beam lamp RLBL, LLBH turned on light (S22).Under this state, front vehicles detecting device FMD test example such as first driving detect this car and the vehicle headway of driving a vehicle earlier.When vehicle headway during less than the 1st predetermined distance of regulation, the control setup ECU that turns on light only turns on light to the sealed beam lamp of giving another the right of way, and the sealed beam lamp that travels is not turned on light.Just, become the illumination of the light distribution patterns LBP of the light beam of giving another the right of way shown in Fig. 5 (a).When vehicle headway reaches the 1st predetermined distance when above (S23), the control setup ECU that turns on light only turns on light to the H2 light source 142 of travel sealed beam lamp RHBL, LHBL, increases the luminosity (S24) of the 2nd light area SA2.Therefore, become the illumination of the light distribution patterns LBP+HBP2 of the light beam that travels shown in Fig. 5 (b).Therefore, the zone, dead ahead and the peripheral region of this car that throws light on brightly can not cause driving earlier and dazzle the eyes sense, improve the visuality in this car the place ahead, thereby guarantee safety traffic.
In addition, at this, reach 2nd predetermined distance bigger when above (S25) with the vehicle headway of front vehicles than the 1st predetermined distance, the control setup ECU that turns on light continues H1 light source 141 is turned on light, increase the luminosity (S26) of the 1st light area SA1, therefore become the illumination of the light distribution patterns LBP+HBP1+HBP2 of the light beam that travels shown in Fig. 5 (c), thereby can either prevent from sense is dazzle the eyes in the generation of driving earlier of moving in the place ahead far away, also can improve the visuality of this car front region far away and peripheral region, thereby guarantee safety traffic.
In addition, in this embodiment 2, though omitted the diagram of diagram of circuit, but, when during once more less than the 2nd predetermined distance, extinguishing H1 light source 14 earlier with the vehicle headway of front vehicles, when further less than the 1st predetermined distance, extinguish H2 light source 142 again, the sealed beam lamp that travels is extinguished, turn back to the illumination of the light beam of giving another the right of way, thereby, both prevented from approaching front vehicles caused and dazzle the eyes sense, also can avoid the unexpected deepening of this car front region, improve the visuality in this car the place ahead, thereby guarantee safety traffic.
Embodiment 3
Fig. 7 is the general configuration figure of sealed beam lamp RHBL (LHBL) that travel of embodiment 3.This lamp constitutes as the projection-type lamp, and its structure comprises: make the catadioptre 21 of ellipse of revolution face shape roughly, the support cylindraceous 22 of front openings that is installed in this catadioptre 21 and the collector lens 23 that is provided in the front openings of this support 22.In the inside of above-mentioned catadioptre 21, has the mono-H light source 24 that constitutes by the bulb on the 1st focus that is configured in catadioptre 21.Above-mentioned collector lens 23 constitutes as convex lens, and it is by being located at the slide mechanism 25 on the above-mentioned support 22, shown in the arrow among Fig. 7, along optical axis Lx in the specified length scope in the enterprising line position adjustment of fore-and-aft direction.Above-mentioned slide mechanism 25 is controlled by the control setup ECU that turns on light as shown in Figure 1, along with the control of turning on light or turn off the light of H light source 24, can carry out the position adjustment of collector lens 23.
In this travels sealed beam lamp RHBL (LHBL), if collector lens 23 is adjusted to the settling position shown in the solid line among Fig. 7, because the rear side focus of collector lens 23 is roughly consistent with the 2nd focus of catadioptre 21, therefore penetrate and through the light of catadioptre 21 reflections from H light source 24, by collector lens 23, penetrate as light beam with optical axis Lx almost parallel, therefore shown in Fig. 8 (a), form the light distribution patterns HBP1 in the wide slightly zone of light ratio the 1st light area SA1, the 1st light area SA1 is the zone of vehicle front central portion of the horizontal direction of this car left and right directions central authorities.If collector lens 23 is carried out the position adjustment from settling position optical axis direction rear shown in the long and short dash line to Fig. 7, because the rear side focus of collector lens 23 is positioned at more rear side than the 2nd focus of catadioptre 21, penetrate and through the light of catadioptre 21 reflections from H light source 24, by collector lens 23, beam goes out as diffusion light, therefore shown in Fig. 8 (b), form the light distribution patterns HBP2 of illumination the 2nd light area SA2, the 2nd light area SA2 is the circular zone from top to the bottom in the horizontal direction of the both sides of the right that keeps left than the 1st light area SA1.
In head lamp with this sealed beam lamp RHBL (LHBL) that travel, switching to from the light beam of giving another the right of way when travelling light beam, begin to open the sealed beam lamp RHBL (LHBL) that travels, forwards settling position carries out the position adjustment from the rear position with collector lens 23 simultaneously.Therefore, the luminous intensity distribution of sealed beam lamp of travelling initial with shown in Fig. 5 (b) equally, become the light distribution patterns that forms the 2nd circular light area SA2, because along with collector lens 23 forwards moves, the light area is to central focus, so the luminosity of the 2nd light area SA2 reduces, on the other hand, the luminosity of the 1st light area SA1 increases gradually, final with shown in Fig. 5 (c) equally, become the luminosity height of the 1st light area SA1, the luminosity of the 2nd light area SA2 is the light distribution patterns lower than the luminosity of the 1st light area SA1.Just, the peripheral region in this car the place ahead brightens gradually, and then the positive zone of this car brightens gradually, finally becomes the luminous intensity distribution of the light beam that travels.Therefore, this car front region can not brighten suddenly, can not bring inharmonious sense to the driver.In addition, owing to little by little brighten from the peripheral region, so, if the driver does not see under the situation of opposite car or driving earlier, can confirm other vehicles at this time point yet, so, can stop switching to the light beam that travels this moment immediately, prevents from advance other vehicles are caused to dazzle the eyes sense.
On the other hand, switching to from the light beam that travels when giving another the right of way light beam, collector lens 23 is rearward carried out the position adjustment gradually from settling position.Thus, from the state shown in initial Fig. 5 (c) to the state shown in Fig. 5 (b), promptly the light quantity of the 1st light area SA1 reduces gradually, the luminosity of the 2nd light area SA2 also reduces gradually afterwards, to the 1st light area and the 2nd light area lighting-off, become the illumination of only being undertaken shown in Fig. 5 (a) at last by the sealed beam lamp of giving another the right of way.Therefore, even the illumination deepening in the positive zone of this car, also can guarantee the illumination of peripheral region, afterwards, because the illumination of peripheral region continues deepening, can prevent the unexpected deepening in light area, the place ahead, can not occur bringing uneasy sense and causing in safety traffic, having problems, and also can not produce inharmonious sense the driver to the driver.
Embodiment 4
Fig. 9 is the concept structure figure of expression as the sealed beam lamp RHBL (LHBL) that travels of the embodiment 4 of the variation of embodiment 3.In embodiment 4, feature is as luminous elements such as light source 24A employing LED.Other parts are identical with Fig. 7.Because LED has directionality aspect the light ejaculation, so by LED is provided on the catadioptre 21, light is penetrated downwards from LED, throw light in the zone that the light contrast level line H that penetrates from collector lens 23 is positioned at the top.Thereby, in this travels sealed beam lamp, by in front and back collector lens 23 being carried out the position adjustment along optical axis Lx, obtain light distribution patterns that the first half of the 1st light area SA1 and the 2nd light area SA2 is thrown light on, the 1st light area SA1 is the zone as the vehicle front central portion of the horizontal direction of Fig. 8 (a) this car left and right directions central authorities that are shown in, the 2nd light area SA2 is roughly than the horizon H zone of upside more, promptly in the zone of the formation semi-annular shape on the top of the horizontal direction of the right both sides that keep left than the 1st light area SA1 among the annular patterns HBP2 shown in Fig. 8 (b).
In embodiment 4, switching to from the light beam of giving another the right of way when travelling light beam, travel sealed beam lamp RHBL (LHBL) afterwards beginning to open, if forwards settling position carries out the position adjustment gradually from the rear position with collector lens 23, the luminous intensity distribution of sealed beam lamp of then travelling only becomes in the luminous intensity distribution shown in Fig. 8 (b) at first than the more illumination of the 2nd light area SA2 of the semi-annular shape that forms of upside of horizon H, along with collector lens 23 moving forwards, the light area increases gradually to the luminosity of the 1st light area SA1 of central focus, finally becomes the luminosity height of the 1st light area SA1, the luminous intensity distribution that the luminosity of the 2nd light area SA2 is lower than the luminosity of the 1st light area SA1.In addition, switching to from the light beam that travels when giving another the right of way light beam, collector lens 23 is rearward carried out the position adjustment gradually from settling position.Therefore, the light quantity of initial the 1st light area SA1 reduces gradually, and the luminosity of the 2nd light area SA2 also reduces gradually afterwards, to the 1st light area and the 2nd light area lighting-off, only throws light on the sealed beam lamp of giving another the right of way at last.Thereby, switch to light distribution patterns same as shown in Figure 5.
In embodiment 4, owing to switching to from the light beam that travels when giving another the right of way light beam, perhaps under any situation that switches to from the light beam of giving another the right of way when travelling light beam, light distribution patterns can not change suddenly, on the basis of the illumination around guaranteeing, reduce or increase the luminosity in the positive zone of this car, therefore can not cause inharmonious sense, can guarantee safety traffic to the driver.In addition, in embodiment 4, adopt luminous elements such as LED as light source 24A, the electric power of this luminous element by being applied in, be easy to carry out the control of continuous amount of emitted light, so, when the luminosity in the 1st light area and the 2nd light area changes, make luminosity through the time little by little change, thereby can more effectively prevent from the driver is caused inharmonious sense.
Embodiment 5
Figure 10 is the concept structure figure of the head lamp of embodiment 5.Head lamp RHL, LHL about embodiment 5 is switches so-called two lamp formula examples of each light distribution patterns of the travel light beam and the light beam of giving another the right of way with 1 lamp.Head lamp RHL, LHL constitute as the projection-type lamp, its structure comprises: the catadioptre 21 of ellipse of revolution face shape, be installed in the support 22 of this catadioptre front openings, be arranged on the collector lens 23 of the front openings of support 22, the HL light source 24B such as halide torch of the 1st focal position that is configured in above-mentioned light deflector 21 and the rotation shade 26 that is configured near position the 2nd focus of above-mentioned light deflector 21 in the forward position of this HL light source 24B regularly, and can adjust the position of rotation of rotation shade 26 by the control setup ECU that turns on light shown in Figure 1.Rotation shade 26 is equipped with a plurality of shades with radial, has 4 shade 26a~26d here at least.Each shade 26a~26d is configured in different position of rotation with different separately shapes, by adjusting the position of rotation of rotation shade 26, shade arbitrarily can be configured in along on the position of optical axis Lx.
If adjust the position of rotation of above-mentioned rotation shade 26, for example adjust shade 26a, be located at position towards optical axis Lx, then shown in Figure 11 (a), covered by shade 26a owing to penetrate first zone of the light that reflects through catadioptre 21 from HL light source 24B, therefore, the roughly upside of horizon H is by shading, and the underside area that is lower than horizon H is illuminated, becomes the have needed dead line light distribution patterns of the light beam of giving another the right of way of (カ ッ ト オ Off ラ イ Application).If shade 26b is carried out the position adjustment, then become shown in Figure 11 (b) to the underside area of horizon H and about the i.e. light distribution patterns that throws light on of the part of the 2nd light area SA2 in some peripheral regions.If shade 26c is carried out the position adjustment, then become shown in Figure 11 (c) to the underside area of horizon H and about than the i.e. light distribution patterns that throws light on of the 2nd light area SA2 in the peripheral region of broad.If shade 26d is carried out the position adjustment, the front to from this car that then becomes shown in Figure 11 (d) is the light distribution patterns that the 1st light area SA1 and the 2nd light area SA2 all throw light on to the peripheral region.
In embodiment 5,, in the light beam of giving another the right of way, form the light distribution patterns that the underside area that is lower than horizon H is thrown light on, the light distribution patterns of the light beam of promptly giving another the right of way by selecting shade 26a.Switching to from the light beam of giving another the right of way when travelling light beam, if the position of rotation of control rotation shade 26, order with shade 26b, 26c, 26d, through the time select these shades, make them be positioned at the position of optical axis Lx, then as Figure 11 (b), (c), (d), change owing to these light distribution patterns, so, append the illumination that the 2nd light area SA2 to peripheral region, the left and right sides carries out at first, the shading scope little by little narrows down towards middle section, becomes further the light distribution patterns of the light beam that travels that the 1st light area SA1 is thrown light on.In addition, switching to from the light beam that travels when giving another the right of way light beam, by change rotation shade 26 with opposite order, begin the 1st light area at first by shading, lightproof area enlarges to the left and right afterwards, and last the 2nd light area is also by shading, thereby becomes the light distribution patterns of the light beam of giving another the right of way.
As previously mentioned, in embodiment 5, switching to from the light beam that travels when giving another the right of way light beam, perhaps under any situation that switches to from the light beam of giving another the right of way when travelling light beam, light distribution patterns can not change suddenly, on the basis of the illumination around guaranteeing, reduce or increase the luminosity in the positive zone of this car, therefore, can not cause inharmonious sense, thereby guarantee safety traffic the driver.
Embodiment 6
Figure 12 is the concept structure figure of the head lamp of embodiment 6.Embodiment 6 similarly to Example 5, head lamp RHL, the LHL about being switches so-called two lamp formula examples of each light distribution patterns of the travel light beam and the light beam of giving another the right of way with 1 lamp.At this, head lamp RHL, LHL and embodiment 2~5 are same, constitute as the projection-type lamp, have variable shade 27 in the position of the front openings of the catadioptre 21 of ellipse of revolution face shape.This variable shade 27 constitutes in the mode that light-shielding pattern at random changes, light transmission type LCD (liquid crystal) device that for example constitutes with rectangular configuration constitutes a plurality of fine pixels, the pattern control that the LCD actuating device of being controlled by the control setup ECU that turns on light by utilization 28 carries out, the light not pattern of permeation parts are that the light-shielding pattern variation is controlled to be arbitrary graphic pattern.
By changing the light-shielding pattern of above-mentioned shade 27, for example, shown in Figure 13 (a), since from HL light source 24B penetrate and through the part of the light of catadioptre 21 reflections by shade 27 shadings, therefore, become light distribution patterns LBP with the light beam of giving another the right of way that the downside to horizon H throws light on and to about around the light distribution patterns of the light distribution patterns HBP21 that throws light on of the part of some the 2nd light area SA2.In addition, shown in Figure 13 (b), can become the light distribution patterns LBP22 of the light area of the peripheral region, the left and right sides that enlarges the 2nd light area SA2, and, shown in Figure 13 (c), can become the shaded effect that does not almost utilize shade 27, and have light distribution patterns the light beam that travels of the light distribution patterns HBP1 that all throws light on from the 1st light area SA1 in this car front to the 2nd light area SA2 on every side and HBP23.
In embodiment 6, by utilizing the control of variable shade 27, in the light beam of giving another the right of way, set mainly the light distribution patterns shown in Figure 13 (a) that the underside area that is lower than horizon H is thrown light on, in the light beam that travels, set the light distribution patterns shown in the Figure 13 (c) that is thrown light in the positive zone of this car.Switching to from the light beam of giving another the right of way when travelling light beam, by the light-shielding pattern of variable shade 27 is controlled, lightproof area is narrowed down gradually, light distribution patterns is as Figure 13 (b), has only the 1st light area SA1 at first by shading, the 2nd light area SA2 is illuminated, then the 1st light area SA1 is also thrown light on, and becomes the light distribution patterns of the light beam that travels.In addition, switching to from the light beam that travels when giving another the right of way light beam, change by the light-shielding pattern that makes variable shade 27 with reverse order, initial the 1st light area SA1 is by shading, afterwards lightproof area upward or about enlarge, last the 2nd light area SA2 is also by shading, thereby becomes the light distribution patterns of the light beam of giving another the right of way.
As previously mentioned, in embodiment 6, switching to from the light beam that travels when giving another the right of way light beam, perhaps under any situation that switches to from the light beam of giving another the right of way when travelling light beam, light distribution patterns can not change suddenly, on the basis of the illumination around guaranteeing, reduce or increase the luminosity in the positive zone of this car, therefore, can not cause inharmonious sense, thereby guarantee safety traffic the driver.
In embodiment 6, owing to can set the light-shielding pattern of variable shade 27 arbitrarily, so, for example shown in Figure 14 (a) and (b), (c), light distribution patterns HBP21, HBP22, HBP23 in the time of particularly will carrying out partial illumination to the 2nd light area SA2 can set for from the upper area of the 1st light area SA1 peripheral region light distribution patterns that enlarges or dwindle on the contrary to the left and right gradually.
Embodiment 7
Embodiment 7 is more than the vehicle headway with front vehicles reaches the regulation vehicle headway and the light beam of will giving another the right of way switches to when travelling light beam, the example that the luminosity of the 2nd light area or the 1st light area is controlled.Figure 15 is its diagram of circuit.The switch LSW (S31) if turn on the light, then give another the right of way sealed beam lamp RLBL, LLBL open (S32).Under this state, front vehicles detecting device FMD test example such as first driving detect this car and the vehicle headway (S33) of driving a vehicle earlier.Turn on light control setup ECU according to this vehicle headway is suitable for the luminosity that the back obtains from control table in predefined control table (S34), the luminosity of the 1st light area SA1 and the 2nd light area SA2 is changed control (S35).This control table is the form with the related setting between the luminosity of vehicle headway and the 1st light area and the 2nd light area.For example, at an example of the variation controller characteristic curve of the luminosity of the relative vehicle headway of control table shown in Figure 16 (a).In the figure, transverse axis is represented vehicle headway, the longitudinal axis represent to give another the right of way the beam lighting zone and the beam lighting zone of travelling, and particularly the light area is represented with oblique line in expression the 1st and the 2nd light area in the beam lighting zone of travelling.As shown in the drawing, when vehicle headway during, the illumination of the light beam of giving another the right of way, when vehicle headway reaches L1 when above, the luminosity of the 2nd light area SA2 is increased one-level less than the 1st predetermined distance L1.Reach up to vehicle headway the 1a predetermined distance L1a bigger than the 1st predetermined distance during keep this state, when vehicle headway reaches 1a predetermined distance L1a when above, the luminosity of the 2nd light area SA2 is further increased one-level.Reach up to vehicle headway the 2nd predetermined distance L2 during keep this state, when vehicle headway reaches the 2nd predetermined distance L2 when above, this increases the luminosity of the 1st light area SA1.In addition, in this example, the 1st predetermined distance L1 and the 2nd predetermined distance L2 are equivalent to the 1st predetermined distance and the 2nd predetermined distance of the foregoing description 2.
For example, be applicable at embodiment 7 under the situation of the sealed beam lamp that travels of embodiment 5 as shown in figure 10, when vehicle headway during less than the 1st predetermined distance L1, the control setup ECU that turns on light sets the shade 26a of rotation shade 26, adopts the light beam of giving another the right of way shown in Figure 11 (a).When vehicle headway reaches the 1st predetermined distance L1 when above, switch to shade 26b, shown in Figure 11 (b), like that, only the two side areas of the 2nd light area SA2 is thrown light on.When vehicle headway reaches 1a predetermined distance L1a when above, switch to shade 26c, shown in Figure 11 (c), like that, the roughly Zone Full of the 2nd light area SA2 is thrown light on.When vehicle headway reaches the 2nd predetermined distance L2 when above, switch to shade 26d, the 2nd light area SA2 and the 1st light area SA1 are thrown light on.By adopting such measure, the control setup ECU that turns on light controls the luminosity of the 1st light area SA1 and the 2nd light area SA2 according to the vehicle headway between Ben Che and the front vehicles.Particularly, for the 2nd light area SA2, can throw light on the different luminosity of two-stage.In addition, as previously mentioned, by setting luminosity corresponding to vehicle headway, and in advance the vehicle headway between the vehicle remain predetermined distance and when travelling, use luminosity corresponding to this vehicle headway, the 2nd light area SA2 or the 1st light area SA1 are thrown light on.Particularly, for the 2nd light area SA2, use the different luminosity shown in Figure 11 (b), (c) to throw light on corresponding to vehicle headway.
For example, Figure 17 is an example of expression vehicle headway and the relevant sequential chart of illumination condition.When vehicle headway during less than L1 (<T1), light beam throws light on giving another the right of way, but, when the vehicle headway with driving earlier becomes big and vehicle headway when reaching more than the 1st predetermined distance L1 (T1), be set at the luminosity that is thrown light in a part of zone about the 2nd light area SA2, more than vehicle headway reaches 1a predetermined distance L1a when (T2), be set at the luminosity that the roughly Zone Full to the 2nd light area SA2 throws light on.In addition, more than vehicle headway reaches the 2nd predetermined distance L2, when (T3), be set at the luminosity that the 1st light area SA1 is thrown light on, become the light beam that travels.Afterwards, when vehicle headway during, end illumination, and reduce luminosity the 1st light area SA1 less than the 2nd predetermined distance L2T4~T5).In addition, along with vehicle headway diminishes gradually, little of than the 2nd predetermined distance L2 and even 1a predetermined distance L1a hour, reduce the luminosity of the 1st light area SA1, the 2nd light area SA2 successively, when vehicle headway during, throw light on the light beam of giving another the right of way once more less than the 1st predetermined distance L1 (T6).On the other hand, under the roughly certain situation of vehicle headway, at this, when vehicle headway remain between the 1st predetermined distance L1 and the 1a predetermined distance L1a (during T7~T8), the 2nd light area SA2 only remain on to about the luminosity that throws light on of a part of zone.In addition, remain between 1a predetermined distance L1a and the 2nd predetermined distance L2 at vehicle headway that (during T9~T10), the 2nd light area SA2 remains on the luminosity of illumination Zone Full.In these cases, the 2nd light area SA2 can be not illuminated.Thus, by the luminosity of the 2nd light area SA2 and the 1st light area SA1 being changed control according to vehicle headway, according to vehicle headway, the luminosity of the light area in this car the place ahead is controlled at stabilized conditions, thereby can not cause inharmonious sense to the driver, and then can not cause the unhelpful sense of dazzling the eyes to driving earlier, on the other hand, can improve the visuality in this car the place ahead.
At this, the sealed beam lamp that travels of embodiment 5 makes the luminosity of the 2nd light area SA2 that 2 grades of variations take place, make the luminosity of the 1st light area SA1 that 1 grade of variation take place, but, by increasing the shade number that constitutes rotation shade 26, also can make the luminosity of the 2nd light area SA2 that variation trickle more than 3 grades takes place, also can make the 1st light area SA1 trickle variation take place with a plurality of luminosity.In addition, this embodiment 7 is not only applicable to the sealed beam lamp that travels of embodiment 5, and can also be applicable to the sealed beam lamp that travels of embodiment shown in Figure 12 6.Even in this case,, can carry out careful luminosity control to the 2nd light area SA2 or the 1st light area SA1 by variable shade 27 is carried out finer control.
Further, also can consider embodiment 7 is applicable to the lamp of embodiment 1 or embodiment 3.But, because the light fixture of embodiment 1 has the structure of the unlatching of toggle lights, therefore, can only carry out 1 grade of luminosity control to the 2nd light area SA2 and the 1st light area SA1 respectively, thereby,, respectively the 2nd light area SA2 and the 1st light area SA1 are carried out 1 grade of luminosity control according to vehicle headway.Just, the characteristic of control table in this case constitutes the 2nd light area SA2 shown in Figure 16 (b) and 2 level structures of the 1st light area SA1.On the other hand,, the lamp of embodiment 3 carries out luminosity control owing to constituting collector lens 23 moved along optical axis direction, so, can carry out stepless control to the luminosity of the 2nd light area SA2 and the 1st light area SA1.Just, the characteristic of control table becomes the characteristic that changes with linearity to the light beam that travels from the light beam of giving another the right of way shown in Figure 16 (c), but, in this case, owing to adopt beam shape to be controlled to be circular lamp from circular variation, so, become increase, the characteristic that the luminosity of the 2nd light area SA2 reduces along with the luminosity of the 1st light area SA1.
In the above description, although understand the example of the 2nd light area SA2 and the 1st light area SA1 both sides' luminosity being controlled according to vehicle headway, but, only can also constitute the luminosity of the 2nd light area SA2 is controlled, only perhaps constitute the luminosity of the 1st light area SA1 is controlled.In addition, in embodiment 7,, still, can also utilize calculator, calculate suitable luminosity, the control of turning on light simultaneously corresponding to vehicle headway with regulation calculating formula based on the luminosity of control table setting corresponding to the 1st and the 2nd light area of vehicle headway.
In the present invention, be used to detect front vehicles detecting device FMD with the vehicle headway of front vehicles, be not limited to the pattern recognition device VP of the use pick up camera CAM of explanation in embodiment 1, can also utilize rang sensor, position calculation sensor or mutual alignment computer device.Wherein, rang sensor utilizes the interval of radio instrumentations such as millimeter wave or micron wave and front vehicles; The position calculation sensor is calculated the position based on this car that obtains from the GPS sensor and the location information of other vehicles; The mutual alignment computer device is based on calculating the mutual alignment by communication between the bus or car with the information that obtains of communicating by letter between the car.
Claims (5)
1. vehicle lamp, constitute and to switch the give another the right of way light beam and the light beam that travels, it is characterized in that, the described light beam that travels to throw light on the 1st light area and the 2nd light area, described the 1st light area is the positive central authorities of vehicle, and described the 2nd light area comprises than the keep left top of horizontal direction of right both sides, described the 1st light area; The control setup of turning on light that the state of turning on light of described vehicle lamp is controlled, switching to from the light beam of giving another the right of way when travelling light beam, after increasing the luminosity of described the 2nd light area, increase the luminosity of described the 1st light area, switching to from the light beam that travels when giving another the right of way light beam, after reducing the luminosity of described the 1st light area, reduce the luminosity of described the 2nd light area.
2. vehicle lamp according to claim 1, it is characterized in that, has the front vehicles detecting device that detects the vehicle that is present in this car the place ahead, the described vehicle headway of control setup between and front vehicles detected by described front vehicles detecting device of turning on light reaches the 1st predetermined distance when above, and light beam switches to the light beam that travels from giving another the right of way.
3. vehicle lamp according to claim 2 is characterized in that, the described control setup of turning on light reaches described the 1st predetermined distance when above at the vehicle headway with front vehicles, only increases the luminosity of described the 2nd light area; The described control setup of turning on light reaches 2nd predetermined distance bigger than described the 1st predetermined distance when above at the vehicle headway with front vehicles, increases the luminosity of described the 1st light area.
4. vehicle lamp according to claim 1, it is characterized in that, have the front vehicles detecting device that detects the vehicle that is present in this car the place ahead, the described control setup of turning on light is controlled at the luminosity of described the 1st light area or described the 2nd light area the luminosity of the vehicle headway setting of and front vehicles detected based on described front vehicles detecting device.
5. according to each described vehicle lamp in the claim 1~4, it is characterized in that, described the 2nd light area is defined as surrounding the annular section of described the 1st light area, the zone, the left and right sides of described the 1st light area, the arbitrary region of the upper-side area of perhaps described the 1st light area.
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Application publication date: 20090506 |