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WO2016162921A1 - Source de lumière de phare et phare - Google Patents

Source de lumière de phare et phare Download PDF

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Publication number
WO2016162921A1
WO2016162921A1 PCT/JP2015/060739 JP2015060739W WO2016162921A1 WO 2016162921 A1 WO2016162921 A1 WO 2016162921A1 JP 2015060739 W JP2015060739 W JP 2015060739W WO 2016162921 A1 WO2016162921 A1 WO 2016162921A1
Authority
WO
WIPO (PCT)
Prior art keywords
light
light emitting
emitting element
headlamp
projection lens
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2015/060739
Other languages
English (en)
Japanese (ja)
Inventor
茂利 藪田
大澤　孝
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to PCT/JP2015/060739 priority Critical patent/WO2016162921A1/fr
Priority to JP2017510809A priority patent/JP6333470B2/ja
Publication of WO2016162921A1 publication Critical patent/WO2016162921A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • F21S41/40—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by screens, non-reflecting members, light-shielding members or fixed shades
    • F21S41/43—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by screens, non-reflecting members, light-shielding members or fixed shades characterised by the shape thereof
    • 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
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/141—Light emitting diodes [LED]
    • F21S41/143—Light emitting diodes [LED] the main emission direction of the LED being parallel to the optical axis of the illuminating device
    • 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
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/141—Light emitting diodes [LED]
    • F21S41/151—Light emitting diodes [LED] arranged in one or more lines
    • 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
    • F21S41/24—Light guides
    • 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
    • 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
    • F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
    • F21S41/32—Optical layout thereof
    • F21S41/322—Optical layout thereof the reflector using total internal reflection

Definitions

  • the present invention relates to a headlamp light source configured to irradiate light emitted from a light emitting element to the front of a vehicle by a projection lens, and a headlamp using the headlamp light source.
  • LEDs light-emitting diodes
  • the shape of the headlight and the degree of design freedom related to light distribution are limited by the shape of the light source.
  • the LED has many variations in size and brightness, the shape and distribution can be achieved by using the LED as the light source.
  • Design freedom related to light is increasing. Increased design freedom realizes a novel design headlight that forms a passing light and a traveling light with multiple light sources, and a headlight with a compact design that combines the passing light and the traveling light. It became possible.
  • the following is a conventional example of a headlamp configured to irradiate the light emitted from the LED to the front of the vehicle with a projection lens, which is configured integrally with a passing lamp and a traveling lamp.
  • the reflecting mirror and the light source are arranged vertically, and the light emitted from each light source is concentrated on the tip of the light distribution forming reflecting plate by each reflecting mirror.
  • the light distribution added for the passing light using the upper light source and the light distribution added for the traveling light using the lower light source are separated by the reflector, and each is independently irradiated to the front of the vehicle. . Therefore, when the lower light source that adds the illumination light for the running light is turned on, the boundary between the illumination light for the passing lamp and the illumination light added for the running light is near the cut-off line. It was easy to be visually recognized as nomura.
  • a vehicle headlamp unit according to Patent Document 2 is an improvement of the invention according to Patent Document 1 described above, and a part of light emitted from a light source for adding traveling light irradiation light is used to form a light distribution reflector. It is the structure which added the reflective mirror which irradiates ahead, without passing through the front-end
  • the headlamp requires an exit surface other than the projection lens, and the opening surface becomes large, so that it could not be used depending on the design of the headlamp or the vehicle.
  • a half mirror is used as a light distribution member in place of the reflector of Patent Document 1, and light emitted from a light source that adds irradiation light for the lower traveling light is emitted.
  • the light is transmitted through the half mirror and directed upward, and is superimposed on the light emitted from the upper light source.
  • the light that has passed through the half mirror is attenuated, and furthermore, it is difficult to efficiently guide the transmitted light to the direction of the projection lens with the flat half mirror, so that sufficient irradiation light is provided below the cutoff line. Irradiation may not be possible. In that case, uneven brightness in the vicinity of the cut-off line cannot be sufficiently reduced.
  • a headlamp that uses a transparent light distribution member such as a prism instead of the light distribution member such as the reflectors of Patent Documents 1 and 2 and the half mirror of Patent Document 3.
  • a transparent light distribution member such as a prism
  • an optical member that guides light emitted from a light source to a projection lens and a projection lens that irradiates the guided light forward.
  • the vehicle lamp according to Patent Document 4 is a lamp that uses a transparent light distribution member, unlike the Patent Documents 1 to 3 configured to use a reflecting mirror, and is exclusively for a passing lamp.
  • the light source is also arranged on the lower side as shown in FIG. 1 and the traveling light distribution is formed by adding the additional illumination light for the traveling lamp to the illumination light for the passing lamp, the above Patent Documents 2 and 3 are used.
  • the said patent document 4 even if the half mirror of patent document 3 is applied with respect to the reflective surface of the transparent light distribution member of this patent document 4, the problem resulting from the said half mirror is wiped off. It is difficult.
  • the present invention has been made to solve the above-described problems, and it is an object of the present invention to reduce uneven brightness that occurs in the vicinity of a cut-off line when a traveling lamp is lit in a headlamp that uses a transparent light distribution member.
  • a light source for a headlamp according to the present invention is a first light emitting element that emits irradiation light for a passing lamp, and is disposed below the first light emitting element, and forms a traveling lamp by being superimposed on the irradiation light for the passing lamp
  • the second light emitting element that emits the irradiation light to be emitted, the first light emitting element, the second light emitting element, and the projection lens are disposed, and the light emitted from the first light emitting element is incident on the light emitting surface of the first light emitting element.
  • the first incident surface, the second incident surface that faces a part of the light emitting surface of the second light emitting element and receives a part of the light emitted by the second light emitting element, and the edge of the focal point of the projection lens are provided.
  • a light distribution member formed of a transparent material formed of a transparent material.
  • the light emitted from the second light emitting element forming the traveling lamp by superimposing the irradiation light of the passing lamp on the light distribution member formed of the transparent material forming the cut-off line for the passing lamp. Since a part of the second incident surface is formed so that light emitted from the second light emitting element is irradiated not only on the upper side of the cut-off line but also on the lower side, the brightness generated in the vicinity of the cut-off line when the traveling lamp is lit Unevenness can be reduced.
  • FIG. 3 is a side view showing a configuration example of a headlamp light source according to the first embodiment. It is a side view which shows the structural example of LED of the headlamp which concerns on Embodiment 1, and a light distribution member. It is a figure which shows the mode of the irradiation light irradiated to the vehicle front from the headlamp which concerns on Embodiment 1.
  • FIG. The modification of the light distribution member of Embodiment 1 is shown, Fig.5 (a) is a side view, FIG.5 (b) is a perspective view.
  • FIG. 6 is a perspective view showing a modification of the light distribution member in the first embodiment.
  • the modification of the light distribution member of Embodiment 1 is shown
  • Fig.8 (a) is a side view
  • FIG.8 (b) is a perspective view.
  • FIG. 10 is a side view showing a modification of the light distribution member in the second embodiment. It is a side view which shows the structural example of the light distribution member used for the headlamp which concerns on Embodiment 3 of this invention. It is a side view which shows the structural example of the light distribution member used for the headlamp which concerns on Embodiment 4 of this invention.
  • FIG. 10 is a side view showing a modification of the light distribution member according to the fourth embodiment.
  • FIG. 25 is a side view showing a modification of the integral member of the sixth embodiment. It is a side view which shows the structural example of the light source for headlamps used for the headlamp which concerns on Embodiment 7 of this invention. It is a side view which shows the example of arrangement
  • FIG. 1 is a side view showing a configuration example of a headlamp 1 according to the first embodiment.
  • FIG. 2 is a side view showing a headlight light source extracted from the headlamp 1 shown in FIG. 1 and 2, the left side of the drawing is the front side of the vehicle (headlight illumination direction).
  • FIG. 1 schematically shows a cross section of the LED fixing member 4, the case 5, and the front lens 6 in order to illustrate the internal structure of the headlamp 1. As shown in FIG.
  • the headlamp 1 according to Embodiment 1 is an example of a headlamp that uses a projection lens that functions as a passing lamp and a traveling lamp, and includes a passing lamp LED 8 and a superposition LED 9,
  • the projection lens 2 for projecting the light emitted from the low-light LED 8 and the superposition LED 9 to the front of the vehicle, the light distribution member 3 formed of a transparent material for forming the light distribution, and the low-light LED 8 and the superposition LED 9 are fixed.
  • the LED fixing member 4 the case 5 which accommodates these, the front lens 6, and the lighting device 7 which lights up the LED 8 for passing light and the LED 9 for superimposition are provided.
  • a heat dissipating member 4 a such as a heat dissipating fin is provided integrally with the LED fixing member 4 in order to dissipate heat generated by the low-light LED 8 and the superimposing LED 9.
  • the heat dissipation member 4a may be exposed to the outside of the case 5 to improve heat dissipation.
  • the LED fixing member 4 also functions as a fixing member for the projection lens 2 and the light distribution member 3 in addition to a function as a fixing member for the low-light LED 8 and the superimposing LED 9.
  • the lighting device 7 supplies a lighting current to the low-light LED 8 and the superposition LED 9.
  • the lighting device 7 lights both the passing lamp LED 8 and the superimposing LED 9 when the headlamp 1 functions as a traveling lamp, and only the passing lamp LED 8 when the headlamp 1 functions as a passing lamp. Lights up.
  • the lighting device 7 is installed on the lower surface of the case 5, but may be installed in a place other than this.
  • the low-light LED 8 as the first light emitting element is fixed to the LED fixing member 4 with the light emitting surface 8a facing the front of the vehicle.
  • the superimposing LED 9 as the second light emitting element is disposed below the passing light LED 8 and is fixed to the LED fixing member 4 with the light emitting surface 9a facing the front of the vehicle.
  • LEDs are used for the first light emitting element that emits the light for the passing lamp and the second light emitting element that emits the superimposed light for the traveling lamp, but other light emitting elements may be used, for example, an LD (laser) A diode) or an OLED (organic light emitting diode).
  • FIG. 3 is a side view illustrating a configuration example of the low-light LED 8, the superposition LED 9, and the light distribution member 3 in the headlamp 1 according to the first embodiment.
  • the light distribution member 3 is formed of a transparent resin, glass, or the like, and is disposed between the low-light LED 8 and the superposition LED 9 and the projection lens 2.
  • the light distribution member 3 includes a first incident surface 3a that is disposed to face the light emitting surface 8a of the low-light LED 8 and receives light emitted from the low-light LED 8; A second incident surface 3b on which a part of the light emitted from the superimposing LED 9 is incident, and an emission surface 3c provided with a linear edge 3c1 at the focal point F on the LED side of the projection lens 2. Is formed.
  • the surface formed on the optical axis side of the projection lens 2 in the light distribution member 3 is a reflection surface 3d that reflects incident light.
  • the light that has entered the light distribution member 3 is emitted from the emission surface 3 c, and is vertically and horizontally reversed by the projection lens 2 and irradiated to the front of the vehicle.
  • the light emitted from the superimposing LED 9 passes through the light distribution member 3 and passes through the upper side of the focal point F of the projection lens 2 and radiates forward, and the lower side of the focal point F of the projection lens 2.
  • the light emitting surface 9 a is arranged on the optical axis of the projection lens 2 because it is divided into light that passes through and is irradiated forward.
  • the reflective surface 3 d provided below the light distribution member 3 may function as a reflective surface that forms a bright light distribution directly below the cutoff line, and is disposed on the optical axis of the projection lens 2. Accordingly, the second incident surface 3b is disposed above the optical axis of the projection lens 2 and faces the upper portion of the light emitting surface 9a of the superimposing LED 9.
  • FIG. 4 shows the passing light irradiation light L1 irradiated to the front of the vehicle from the headlamp 1, the upper irradiation light L2 irradiated to the upper part of the cutoff line for the traveling light, and the lower irradiation irradiated to the lower part of the cutoff line.
  • the state of the light L3 is shown.
  • the irradiation light L1 for the passing light is darker on the upper side and lower (road surface side). ) Need to be brightly illuminated.
  • the boundary line between the upper dark part and the lower bright part of the illuminating light L1 for passing light is a cut-off line.
  • the upper irradiation light L2 for the traveling lamp is irradiated on the upper side of the cut-off line of the irradiation light L1 for the passing lamp, and the lower irradiation light for the traveling lamp is irradiated on the lower side.
  • L3 is irradiated, and the traveling lamp irradiation light is superimposed on the passing lamp irradiation light.
  • the passing lamp LED 8 when the headlamp 1 functions as a passing lamp, the passing lamp LED 8 is turned on.
  • the light emitted from the low-light LED 8 is incident on the first incident surface 3a of the light distribution member 3 and emitted from the light-emitting surface 3c, and passes through the projection lens 2 and illuminates the lower side of the cut-off line. L1.
  • the light directed downward from the low-light LED 8 is reflected by the reflecting surface 3d, guided upward from the focal point F, and emitted from the light-emitting surface 3c, and passes through the projection lens 2 and passes through the low-light irradiation light L1.
  • a light distribution for a passing lamp is formed in which the upper side is dark and the lower side is bright in front of the vehicle. Further, the shape of the end 3c1 of the exit surface 3c passing through the focal point F of the projection lens 2 is projected forward of the vehicle by the projection lens 2 to form a cut-off line shape.
  • the superimposing LED 9 is lit in addition to the passing lamp LED 8. Part of the light emitted from the superimposing LED 9 enters the second incident surface 3b of the light distribution member 3 and exits from the exit surface 3c. Since this light passes above the focal point F and passes through the projection lens 2, it becomes the lower irradiation light L3 for the traveling lamp that illuminates the lower side of the cutoff line, and a part of the light emitted from the superimposing LED 9 is distributed. Since the light does not enter the second incident surface 3b of the optical member 3 and passes through the lower side of the focal point F and passes through the projection lens 2, it becomes the upper irradiation light L2 for the traveling lamp that illuminates the upper side of the cutoff line.
  • the headlamp 1 since the light of the superimposing LED 9 is irradiated as the traveling lamp upper irradiation light L2 and the traveling lamp lower irradiation light L3 across the upper and lower sides of the cut-off line, the headlamp 1 functions as a traveling lamp. Unevenness of brightness near the cut-off line can be reduced. And a driver
  • the good field of view mentioned here is a field of view secured by a light distribution that is easy for the driver to drive, for example, a light distribution that is bright, easy to find an obstacle, and hard to get tired.
  • the first incident surface 3a is inclined with respect to a virtual surface A perpendicular to the optical axis of the projection lens 2, and the first incident surface 3a. Is closer to the projection lens 2 than the lower edge. Since the light incident on the inclined first incident surface 3a is refracted toward the optical axis side of the projection lens 2, the low-lamp illumination light L1 is concentrated on the cut-off line side. Accordingly, it is possible to brightly illuminate the area immediately below the cut-off line, that is, far away in front of the vehicle.
  • a condensing reflecting surface 3e serving as a condensing portion is formed above the first incident surface 3a.
  • the light traveling upward without entering the first incident surface 3 a is wasted without being irradiated forward of the vehicle. Therefore, a light reflecting surface 3e is formed on the upward light path from the LED 8 for passing light, and the upward light is reflected, guided to the front projection lens 2 side and irradiated to the front of the vehicle.
  • the light of the light LED 8 can be used effectively without waste. Thereby, the bright headlamp 1 can be configured with high efficiency, that is, low power consumption.
  • FIG. 5 shows a configuration of a light distribution member 3-1 obtained by modifying the light distribution member 3 of the first embodiment.
  • 5A is a side view of the light distribution member 3-1
  • FIG. 5B is a perspective view.
  • the end 3c1 passing through the focal point F forms a horizontal portion 3c1-1 with the sidewalk side of the vehicle being horizontal, and the opposite lane side is inclined downward to incline the portion 3c1-2. Is made.
  • the second incident surface 3b It is desirable that the lower side edge of the LED be arranged on a straight line that intersects with the lower side edge 3c1 of the emission surface 3c and passes through the light emitting surface 9a of the superimposing LED 9.
  • FIG. 6 shows the state of the passing light irradiation light L1, the traveling light upper irradiation light L2, and the traveling light lower irradiation light L3 irradiated to the front of the vehicle from the headlamp 1 using the light distribution member 3-1. ing.
  • the shadow of the emitted light formed by the shape of the horizontal portion 3c1-1 and the inclined portion 3c1-2 of the light distribution member 3-1 is inverted vertically and horizontally by the projection lens 2 and projected to the front of the vehicle as shown in FIG.
  • 5 and 6 are diagrams for explaining the headlamp 1 for a vehicle traveling on the left side of the road.
  • the horizontal portion of the light distribution member 3-1 is illustrated.
  • the shapes of 3c1-1 and the inclined portion 3c1-2 may be reversed left and right.
  • the shape of the cut-off line can be changed by changing the shape of the exit surface 3 c, particularly the shape of the end 3 c 1 passing through the focal point F of the projection lens 2.
  • the shape of the lower side edge of the second incident surface 3b on which the light emitted from the superimposing LED 9 is incident be a shape corresponding to the shape of the emitting surface 3c as described above.
  • the shape of the second incident surface 3b and the shape of the portion of the exit surface 3c facing the second incident surface 3b are not necessarily the same.
  • the second incident surface 3b The shape may be any shape as long as the light emitted from the superimposing LED 9 toward the lower end 3c1 of the light emission surface 3c of the light distribution member 3-1 can be emitted from the light emission surface 3c without being interrupted.
  • FIG. 7 shows a configuration of a light distribution member 3-2 obtained by modifying the light distribution member 3 of the first embodiment.
  • the exit surface 3c has a curved surface
  • the end side 3c1 passing through the focal point F of the projection lens 2 has an arcuate curve.
  • the sidewalk side of the vehicle is horizontal to form a horizontal portion 3c1-1 and the opposite lane side is directed downward.
  • An inclined portion 3c1-2 is formed by inclining.
  • the focal point F does not become a straight line orthogonal to the optical axis due to the aberration of the projection lens 2 but becomes an arc
  • the light distribution member 3-2 having the same arc-shaped end side 3c1 as the arc of the focal point F is used.
  • FIG. 8 shows a configuration of a light distribution member 3-3 obtained by modifying the light distribution member 3 of the first embodiment.
  • 8A is a side view of the light distribution member 3-3
  • FIG. 8B is a perspective view.
  • FIG. 9 shows the state of the passing light irradiation light L1, the traveling light upper irradiation light L2, and the traveling light lower irradiation light L3 irradiated to the front of the vehicle from the headlamp 1 using the light distribution member 3-3. ing.
  • an uneven portion 3f is formed on the exit surface side of the reflecting surface 3d, and the end 3c1 passing through the focal point F is formed into a small uneven wave shape as shown in FIG.
  • the cut-off line of the irradiation light L1 becomes unclear.
  • the cut-off line goes up and the irradiation light that originally illuminates the lower part of the cut-off line drives the oncoming vehicle. Even if it reaches the eyes of the driver, the change in brightness is slow, so the dazzling feeling felt by the driver can be reduced.
  • the traveling lamp is lit, the brightness change near the cut-off line becomes slow, and the uneven brightness of the part can be reduced.
  • grooved part 3f will be visually recognized as distortion of the cut-off line of a passing lamp if it is too large, it is possible to form a preferable light distribution so that the cut-off line becomes blurred and unclear.
  • the headlamp light source is disposed below the low-light LED 8 that emits low-light irradiation light and is superimposed on the low-light irradiation light.
  • the superimposing LED 9 that emits the irradiating light that forms the traveling lamp, the first incident surface 3a that is incident on the light emitting surface 8a of the passing lamp LED 8 and the light emitted from the passing lamp LED 8 is incident, and the overlapping LED 9 emits light.
  • a second incident surface 3b that receives a part of the light emitted from the superimposing LED 9 is opposed to a part of the surface 9a, and an output surface 3c that is provided with an end 3c1 at the focal point F of the projection lens 2, and is transparent.
  • the light distribution member 3 made of a material Since the light distribution member 3 made of a material is provided, the light emitted from the superimposing LED 9 can be irradiated not only on the upper side of the cut-off line but also on the lower side. It is possible to reduce the brightness unevenness that occur in the vicinity of the line.
  • the shape of the end 3c1 passing through the focal point F of the projection lens 2 is a straight line as shown in FIG. 1 to FIG. 3 or FIG. 5, a curved line as shown in FIG. It can be freely selected according to the light distribution design.
  • the light source for headlamps was provided with the condensing reflective surface 3e which condenses the light which the LED 8 for passing lamps condenses, the light which the LED 8 for passing lamps emits effectively Therefore, it is possible to construct a light source and a headlight that are highly efficient and bright.
  • FIG. FIG. 10 is a side view showing a configuration example of the light distribution member 3-4 used in the headlamp 1 according to the second embodiment.
  • the configuration other than the light distribution member 3-4, the passing lamp LED 8, and the superimposing LED 9 is the same as that in FIGS. 1 to 9 of the first embodiment. Therefore, illustration and detailed description here are omitted.
  • the second incident surface 3b on which the light emitted from the superimposing LED 9 is incident is disposed below the virtual surface B so as not to block the light traveling from the low-light LED 8 toward the end 3c1 of the emission surface 3c.
  • FIG. 11A as a reference example for helping understanding of the second embodiment, a virtual surface passing through the end side 3c1 of the emission surface 3c and the lower end side 8a1 of the light emitting surface 8a of the low-light LED 8 is shown.
  • the light distribution member 100 in which the upper side edge 3b1 of the second incident surface 3b is formed above B is shown.
  • FIG. 11B shows a cut-off line C1 of the illuminating light L1 for the passing lamp irradiated from the headlamp 1 using the light distribution member 3-4 of the second embodiment to the front of the vehicle, and the light distribution of the reference example.
  • the state of the cut-off line C100 of the illuminating light L1 for the passing lamp irradiated from the headlamp 1 using the member 100 to the front of the vehicle is shown.
  • the light from the low-light LED 8 is blocked by the upper side edge 3b1 of the second incident surface 3b and does not reach the side edge 3c1 passing through the focal point F of the projection lens 2.
  • the cut-off line C100 is displaced from the position of the cut-off line C1 that should be originally provided, and the light distribution is not preferable.
  • the upper end side 3b1 of the second incident surface 3b of the light distribution member 3-4 is connected to the end side 3c1 of the exit surface 3c passing through the focal point F of the projection lens 2 and a passing lamp.
  • FIG. 12 shows a configuration of a light distribution member 3-5 obtained by modifying the light distribution member 3-4 of the second embodiment.
  • the second incident surface 3b is divided into a plurality of second incident surfaces 3b-1 to 3b-3, and the area per one is reduced.
  • the area per one is reduced.
  • FIG. FIG. 13 is a side view showing a configuration example of the light distribution member 3-6 used in the headlamp 1 according to the third embodiment.
  • the configuration other than the light distribution member 3-6, the passing lamp LED 8, and the superimposing LED 9 is the same as that in FIGS. 1 to 9 of the first embodiment. Therefore, illustration and detailed description here are omitted.
  • the first incident surface 3a is inclined.
  • the second incident surface 3b is also inclined.
  • the second incident surface 3b is inclined with respect to a virtual surface A perpendicular to the optical axis of the projection lens 2, and the upper side edge of the second incident surface 3b is closer to the projection lens 2 than the lower side edge. Since the light incident on the inclined second incident surface 3b is refracted toward the optical axis side of the projection lens 2, the traveling lamp lower irradiation light L3 is concentrated on the cut-off line side. As a result, it is possible to further reduce the uneven brightness that occurs in the vicinity of the cut-off line when the traveling lamp is lit, and at the same time, it is possible to brightly illuminate the area immediately below the cut-off line, that is, a distant place. A light can be configured.
  • the irradiation direction of the lower irradiation light L3 for the traveling lamp can be adjusted by changing the inclination angle of the second incident surface 3b.
  • Light source and headlamp can be configured.
  • FIG. 14 is a side view showing a configuration example of the light distribution member 3-7 used in the headlamp 1 according to the fourth embodiment.
  • the configuration other than the light distribution member 3-7, the passing lamp LED 8, and the superimposing LED 9 is the same as that in FIGS. 1 to 9 of the first embodiment. Therefore, illustration and detailed description here are omitted.
  • the first incident surface 3a and the second incident surface 3b are curved so that they are inclined with respect to a virtual surface perpendicular to the optical axis of the projection lens 2. I am in a posture.
  • the light of the low-light LED 8 incident on the curved first incident surface 3a is refracted toward the optical axis of the projection lens 2, and the low-light irradiation light L1 is concentrated on the cut-off line side. Further, the light of the superimposing LED 9 incident on the curved second incident surface 3b is also refracted to the optical axis side of the projection lens 2, so that the traveling lamp lower irradiation light L3 is concentrated on the cut-off line side.
  • a light can be configured.
  • irregularities may be formed on the second incident surface 3b. Since the light of the superimposing LED 9 incident on the second incident surface 3b provided with the unevenness is scattered by the unevenness, the change in brightness of the lower irradiation light L3 for the traveling lamp becomes slow, and the lower part of the cut-off line is displayed when the traveling lamp is turned on. The resulting brightness unevenness can be further reduced.
  • the condensing reflecting surface 3e is formed on the upper side of the first incident surface 3a and the lower side of the first incident surface 3a.
  • the condensing reflecting surface 3g is formed so that the light emitted from the low-light LED 8 can be used more effectively.
  • the condensing reflecting surfaces 3e and 3g may have any shape as long as the light can be condensed.
  • the reflecting surfaces 3e and 3g may have a planar shape as shown in FIG. It may be curved as shown in FIG.
  • the fourth embodiment it is possible to adjust the irradiation direction or irradiation mode of the traveling lamp lower irradiation light L3 by forming a curved surface or unevenness on the second incident surface 3b.
  • the headlight light source and headlight can be configured.
  • FIG. FIG. 16 is a side view showing a configuration example in which a light collecting member 10 is added to the light distribution member 3 used in the headlamp 1 according to the fifth embodiment. Note that, in the headlamp 1 according to the fifth embodiment, the configuration other than the light collecting member 10 is the same as that in FIGS. 1 to 9 in the first embodiment. Omitted.
  • the condensing member 10 which condenses the light emitted from the superimposing LED 9 is installed between the superimposing LED 9 and the light distribution member 3.
  • a part of the light of the superimposing LED 9 that has passed through the condensing member 10 is incident on the second incident surface 3b of the light distribution member 3 to become the traveling lamp lower irradiation light L3, and a part of the light is incident on the projection lens 2 as it is.
  • the upper illumination light L2 for the traveling lamp is obtained.
  • the fifth embodiment by arranging the light collecting member 10 at a position facing the superimposing LED 9, light emitted from the superimposing LED 9 can be effectively used, and high efficiency, that is, A bright headlamp 1 can be constructed with low power consumption.
  • FIG. 17 is a side view showing the integrated member 11 used in the headlamp 1 according to the sixth embodiment.
  • the projection lens 2 and the light distribution member 3 are integrated using a transparent material to constitute an integrated member 11.
  • the integrated member 11 includes a projection lens unit 11 a that functions as the projection lens 2 and a light distribution unit 11 b that functions as the light distribution member 3.
  • a member that holds the positional relationship between the projection lens 2 and the light distribution member 3 with high accuracy is required.
  • a member that holds the positional relationship between 11a and the light distribution portion 11b with high accuracy is not necessary. Thereby, the light source for headlamps and a headlamp can be made into a simple structure.
  • a condensing part 11c that reflects light directed downward from the superimposing LED 9 and condenses it toward the front projection lens part 11a may be formed.
  • the light emitted from the superimposing LED 9 can be used effectively, and the bright headlamp 1 can be configured with high efficiency, that is, low power consumption.
  • FIG. 19 is a side view illustrating a configuration example of a headlamp light source used in the headlamp 1 according to the seventh embodiment.
  • the same or corresponding parts as those in FIGS. 1 to 9 of the first embodiment are denoted by the same reference numerals and description thereof is omitted.
  • small irregularities are formed on the exit surface 2a of the projection lens 2-1.
  • the light / dark boundary of the illuminating light L1 passing through the vehicle from -1 to the front of the vehicle is blurred and unclear. Thereby, generation
  • the cut-off line of the low-light illumination light L1 becomes unclear, so that the cut-off line rises, for example, when the vehicle shakes up and down while the low-light is on and the optical axis of the headlamp tilts upward. Even if the illuminating light that originally illuminates the lower part of the cut-off line reaches the eyes of the driver driving the oncoming vehicle, the change in brightness is slow, so the dazzling feeling felt by the driver can be reduced.
  • the projection / projection lens 2-1 is too large, the effect of blurring the border between light and darkness will be diminished, and the irradiation direction will change and the original characteristics of the headlamp will be impaired. It is better to be small enough.
  • the unevenness is formed on the exit surface 2a.
  • the unevenness may be formed on the entrance surface 2b, or on both the exit surface 2a and the entrance surface 2b. It may be formed.
  • the unevenness may be a dot shape, a concentric stripe shape, a stripe shape extending in the vertical direction or the horizontal direction.
  • the same effect as the unevenness may be obtained by mixing fine particles that scatter light into the transparent material constituting the projection lens 2-1, or fine bubbles may be mixed in the transparent material. The same effect as the unevenness may be obtained.
  • the seventh embodiment by forming irregularities on the surface of the projection lens 2-1, the bright / dark boundary of the low-light illumination light L1 can be blurred, which occurs near the cutoff line. Generation of monochromatic light can be reduced.
  • Embodiment 8 Since the configuration of the headlamp 1 according to Embodiment 8 is the same as that shown in FIGS. 1 to 19 in Embodiments 1 to 7, the following description will be given with reference to FIG.
  • the first to seventh embodiments when the headlamp 1 is made to function as a traveling lamp, both the passing lamp LED 8 and the superimposing LED 9 are turned on, and when the headlamp 1 is made to function as a passing lamp, the passing lamp is used. Only the LED 8 was turned on.
  • the eighth embodiment when the headlamp 1 is made to function as a passing light, the superimposing LED 9 is turned on darker than when the traveling light is turned on while the passing light LED 8 is turned on.
  • the dimming of the superimposing LED 9 may be realized by a method in which the current supplied from the lighting device 7 to the superimposing LED 9 is less than the rated current, or the current supplied by the PWM (Pulse Width Modulation) method is comb-toothed. It may be realized by reducing the duty of the energization current in the shape.
  • PWM Pulse Width Modulation
  • the upper side of the cut-off line for the passing lamp can be lightly illuminated by turning on the LED 9 for superimposing darker than the rated lighting.
  • a lighting can be constructed. Also, since the difference in brightness between the upper and lower parts of the low-light cut-off line can be reduced, the cut-off line goes up when the vehicle shakes up and down and the optical axis of the headlight tilts upward.
  • the superimposing LED 9 that is turned on when the passing light is turned on is sufficiently darker than the irradiation light that is turned on when the traveling light is turned on.
  • the low-light LED 8 and the superposition LED 9 are arranged side by side on the same plane of the LED fixing member 4, but the arrangement position is not limited to this.
  • FIG. 20 the example of arrangement
  • a step is formed on the LED fixing member 4, and the low-light LED 8 and the superposition LED 9 are arranged at an arbitrary position and an arbitrary direction.
  • the transparent light distribution member 12 that adjusts the light distribution of the upper irradiation light L2 for the traveling lamp is arranged with the incident surface facing a part of the light emitting surface 9a of the superimposing LED 9. It is installed below the optical member 3-9.
  • the light distribution member 12 refracts the light emitted from the superimposing LED 9 toward the optical axis side of the projection lens 2 and concentrates it on the cut-off line side. This makes it possible to brightly illuminate the area immediately above the cut-off line, that is, a distant place, providing a good field of view in the distance and providing a preferable light distribution as a traveling light.
  • the lighting device 7 turns on the superimposing LED 9 when the headlamp 1 functions as a traveling lamp, and also when the headlamp 1 functions as a passing lamp. Since the light is dimmed from the case of functioning as a traveling light, the headlamp with a preferable light distribution with high visibility and easy driving can be configured.
  • the light source for headlamps according to the present invention is suitable for use as a headlamp that also serves as a traveling lamp and a passing lamp.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)

Abstract

La présente invention a pour but d'atténuer, dans un phare utilisant un élément de distribution de lumière transparent, l'irrégularité de la luminosité se produisant à proximité d'une ligne de coupure lorsqu'un feu de route est allumé. Ladite source de lumière de phare comprend un élément de répartition de la lumière (3) moyennant quoi une ligne de coupure de feu de croisement est formée. L'élément de répartition de la lumière (3) comprend une surface d'entrée (3a) permettant l'entrée de la lumière provenant d'une DEL de feu de croisement (8) et une surface d'entrée (3b) permettant l'entrée d'une partie de la lumière émise par une DEL de chevauchement (9), la DEL de chevauchement (9) émettant une lumière rayonnante qui forme un feu de route par chevauchement avec la lumière rayonnante provenant du feu de croisement. Selon la configuration, lorsque le feu de route est allumé, la lumière émise par la DEL de chevauchement (9) est rayonnée non seulement sur le côté supérieur de la ligne de coupure, mais également sur le côté inférieur de celle-ci, et atténue l'irrégularité de luminosité à proximité de la ligne de coupure.
PCT/JP2015/060739 2015-04-06 2015-04-06 Source de lumière de phare et phare Ceased WO2016162921A1 (fr)

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PCT/JP2015/060739 WO2016162921A1 (fr) 2015-04-06 2015-04-06 Source de lumière de phare et phare
JP2017510809A JP6333470B2 (ja) 2015-04-06 2015-04-06 前照灯用光源および前照灯

Applications Claiming Priority (1)

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PCT/JP2015/060739 WO2016162921A1 (fr) 2015-04-06 2015-04-06 Source de lumière de phare et phare

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WO2016162921A1 true WO2016162921A1 (fr) 2016-10-13

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CN108662542A (zh) * 2018-06-01 2018-10-16 江苏信利电子有限公司 机动车近光灯及机动车
CN108692251A (zh) * 2017-02-22 2018-10-23 常州星宇车灯股份有限公司 一种透射式激光led复合远近光、辅助远光模组
CN108692252A (zh) * 2017-02-22 2018-10-23 常州星宇车灯股份有限公司 一种反射式激光led复合远近光、辅助远光模组
TWI650256B (zh) * 2018-01-29 2019-02-11 誠益光電科技股份有限公司 智慧頭燈
JP2019139900A (ja) * 2018-02-08 2019-08-22 スタンレー電気株式会社 車両用灯具
WO2019211120A1 (fr) * 2018-05-04 2019-11-07 HELLA GmbH & Co. KGaA Projecteur
EP3848626A1 (fr) * 2020-01-08 2021-07-14 Lumileds Holding B.V. Système d'éclairage avant pour phare de véhicule
EP3943808A1 (fr) * 2020-07-20 2022-01-26 Stanley Electric Co., Ltd. Dispositif d'éclairage pour véhicule
EP3865766A4 (fr) * 2018-10-10 2022-07-20 Ichikoh Industries, Ltd. Guide de lumière pour véhicules, et lampe pour véhicules
EP4170228A1 (fr) * 2021-10-22 2023-04-26 ZKW Group GmbH Dispositif d'éclairage pour phare de véhicule
JP2023083151A (ja) * 2021-12-03 2023-06-15 市光工業株式会社 車両用前照灯
US20240019094A1 (en) * 2020-12-15 2024-01-18 Koito Manufacturing Co., Ltd. Lamp unit
JP2024163857A (ja) * 2023-05-12 2024-11-22 ツェットカーヴェー グループ ゲーエムベーハー 自動車投光器用の照射装置並びに自動車投光器
DE102018110793B4 (de) 2018-05-04 2026-02-05 HELLA GmbH & Co. KGaA Projektionsscheinwerfer

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JP2007265864A (ja) * 2006-03-29 2007-10-11 Koito Mfg Co Ltd 車両用前照灯の灯具ユニット
JP2013544426A (ja) * 2010-12-03 2013-12-12 ドクター・オプティクス・エスイー 車両のヘッドライト
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CN108692251B (zh) * 2017-02-22 2024-05-17 常州星宇车灯股份有限公司 一种透射式激光led复合远近光、辅助远光模组
CN108692251A (zh) * 2017-02-22 2018-10-23 常州星宇车灯股份有限公司 一种透射式激光led复合远近光、辅助远光模组
CN108692252A (zh) * 2017-02-22 2018-10-23 常州星宇车灯股份有限公司 一种反射式激光led复合远近光、辅助远光模组
TWI650256B (zh) * 2018-01-29 2019-02-11 誠益光電科技股份有限公司 智慧頭燈
JP2019139900A (ja) * 2018-02-08 2019-08-22 スタンレー電気株式会社 車両用灯具
JP7093641B2 (ja) 2018-02-08 2022-06-30 スタンレー電気株式会社 車両用灯具
CN112074687A (zh) * 2018-05-04 2020-12-11 海拉有限双合股份公司 投射式前照灯
DE102018110793B4 (de) 2018-05-04 2026-02-05 HELLA GmbH & Co. KGaA Projektionsscheinwerfer
US11274802B2 (en) 2018-05-04 2022-03-15 HELLA GmbH & Co. KGaA Projection headlight
WO2019211120A1 (fr) * 2018-05-04 2019-11-07 HELLA GmbH & Co. KGaA Projecteur
CN108662542A (zh) * 2018-06-01 2018-10-16 江苏信利电子有限公司 机动车近光灯及机动车
EP3865766A4 (fr) * 2018-10-10 2022-07-20 Ichikoh Industries, Ltd. Guide de lumière pour véhicules, et lampe pour véhicules
US11603972B2 (en) 2018-10-10 2023-03-14 Ichikoh Industries, Ltd. Light guide for vehicles, and lamp for vehicles
EP3848626A1 (fr) * 2020-01-08 2021-07-14 Lumileds Holding B.V. Système d'éclairage avant pour phare de véhicule
US11441750B2 (en) 2020-07-20 2022-09-13 Stanley Electric Co., Ltd. Lighting tool for vehicle
EP3943808A1 (fr) * 2020-07-20 2022-01-26 Stanley Electric Co., Ltd. Dispositif d'éclairage pour véhicule
US20240019094A1 (en) * 2020-12-15 2024-01-18 Koito Manufacturing Co., Ltd. Lamp unit
EP4265959A4 (fr) * 2020-12-15 2024-05-15 Koito Manufacturing Co., Ltd. Unité de lampe
US12013093B2 (en) * 2020-12-15 2024-06-18 Koito Manufacturing Co., Ltd. Lamp unit
WO2023066756A1 (fr) * 2021-10-22 2023-04-27 Zkw Group Gmbh Dispositif d'éclairage pour un projecteur de véhicule
EP4170228A1 (fr) * 2021-10-22 2023-04-26 ZKW Group GmbH Dispositif d'éclairage pour phare de véhicule
US12474026B2 (en) 2021-10-22 2025-11-18 Zkw Group Gmbh Illumination device for a vehicle headlamp
JP2023083151A (ja) * 2021-12-03 2023-06-15 市光工業株式会社 車両用前照灯
JP7757744B2 (ja) 2021-12-03 2025-10-22 市光工業株式会社 車両用前照灯
JP2024163857A (ja) * 2023-05-12 2024-11-22 ツェットカーヴェー グループ ゲーエムベーハー 自動車投光器用の照射装置並びに自動車投光器

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