WO2020235301A1 - 車輌用前照灯 - Google Patents
車輌用前照灯 Download PDFInfo
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- WO2020235301A1 WO2020235301A1 PCT/JP2020/017874 JP2020017874W WO2020235301A1 WO 2020235301 A1 WO2020235301 A1 WO 2020235301A1 JP 2020017874 W JP2020017874 W JP 2020017874W WO 2020235301 A1 WO2020235301 A1 WO 2020235301A1
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- WIPO (PCT)
- Prior art keywords
- light source
- light
- irradiation pattern
- irradiation
- reflecting surface
- Prior art date
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Classifications
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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
- F21S41/10—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]
- F21S41/147—Light emitting diodes [LED] the main emission direction of the LED being angled to the optical axis of the illuminating device
- F21S41/148—Light emitting diodes [LED] the main emission direction of the LED being angled to the optical axis of the illuminating device the main emission direction of the LED being perpendicular to the optical axis
-
- 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
- F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
- F21S41/19—Attachment of light sources or lamp holders
-
- 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
- F21S41/321—Optical layout thereof the reflector being a surface of revolution or a planar surface, e.g. truncated
-
- 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
- F21S41/33—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature
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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
- F21S41/65—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on light sources
- F21S41/663—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on light sources by switching light sources
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V7/00—Reflectors for light sources
- F21V7/04—Optical design
- F21V7/06—Optical design with parabolic curvature
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
- F21Y2115/00—Light-generating elements of semiconductor light sources
- F21Y2115/10—Light-emitting diodes [LED]
Definitions
- the present invention relates to a technical field of a vehicle headlight in which light emitted from a plurality of light sources for which turning on and off is controlled is reflected by a reflecting surface of a reflector.
- a plurality of light sources, reflectors, and other parts are arranged in a lamp chamber, which is an internal space of a lamp outer housing composed of a lamp housing and a cover, and a plurality of light sources are arranged based on the running state of the vehicle.
- a lamp chamber which is an internal space of a lamp outer housing composed of a lamp housing and a cover
- a plurality of light sources are arranged based on the running state of the vehicle.
- a light source that illuminates an area where another vehicle such as a preceding vehicle detected by processing an image taken by a camera exists is turned off.
- ADB Adaptive Driving Beam
- the focal length of the reflecting surface of the reflector is reduced. Therefore, it is considered to reduce the curvature of the reflecting surface.
- the object of the vehicle headlight of the present invention is to reduce the size of the vehicle headlight while suppressing the uneven brightness in the light distribution pattern.
- the vehicle headlight according to the present invention emits light toward a reflector having a plurality of reflecting surfaces arranged in the left-right direction and one of the reflecting surfaces arranged in the left-right direction. It is provided with n light sources, and at least two of the light sources located adjacent to each other are provided as a shared light source that emits light toward the same reflecting surface, and is provided by the light emitted from each of the n light sources. N irradiation patterns that irradiate different regions in the left-right direction are formed, and the n irradiation patterns are sequentially changed from the first irradiation pattern to the nth irradiation pattern in the left-right direction, and in the irradiation pattern of the number immediately after that.
- At least half of the area is overlapped with at least half of the immediately preceding irradiation pattern in the left-right direction, and the light emitted from the shared light source forms adjacent irradiation patterns in which the areas do not overlap.
- the focal distances of the plurality of reflecting surfaces are set in the above.
- the focal length is set to 10 mm to 15 mm.
- the shared light source is composed of the two light sources.
- the number of reflecting surfaces is significantly reduced compared to the number of light sources.
- At least one of the light sources is provided as a non-shared light source other than the shared light source.
- the adjacent irradiation patterns in which the areas do not overlap due to the light emitted from the shared light source since each of these is formed, it is possible to reduce the focal distance of the reflecting surface in the reflector after forming a light distribution pattern that is unlikely to cause uneven brightness, and to suppress uneven brightness in the light distribution pattern before using the vehicle. The size of the lighting can be reduced.
- 2 to 8 show an embodiment of the vehicle headlight of the present invention, and this figure is a cross-sectional view of the vehicle headlight.
- It is a schematic front view of a lamp unit.
- It is a conceptual diagram which shows the irradiation pattern.
- It is a figure which shows the difference of the light source which forms each irradiation pattern in comparison with the conventional headlight for a vehicle.
- It is a conceptual diagram which shows the irradiation pattern of the lamp unit which concerns on 1st modification.
- It is a conceptual diagram which shows the irradiation pattern of the lamp unit which concerns on the 2nd modification.
- It is a figure which shows the difference of the light source which forms each irradiation pattern in the lamp unit which concerns on the 2nd modification.
- the vehicle headlights 1 are attached and arranged at both left and right ends of the front end of the vehicle body.
- the vehicle headlight 1 includes a lamp housing 2 having an opening at the front end and a cover 3 attached to the lamp housing 2 with the opening of the lamp housing 2 closed (see FIG. 1).
- the lamp housing 2 and the cover 3 constitute a lamp outer housing 4.
- the internal space of the lamp outer casing 4 is formed as a lamp chamber 4a.
- the lamp unit 5 is arranged in the lamp chamber 4a.
- the lamp unit 5 includes a bracket 6, a reflector 7, a substrate 8, and light sources 9, 9, ....
- the bracket 6 has a plate-shaped connecting portion 10 facing in the front-rear direction and a plate-shaped mounting portion 11 facing in the vertical direction, and the upper end portion of the connecting portion 10 and the rear end portion of the mounting portion 11 are continuous.
- the mounting portion 11 is provided as a reflector mounting portion 11a in which the first half portion is thicker than the second half portion, and the latter half portion is provided as a substrate mounting portion 11b.
- the lower surface of the reflector mounting portion 11a is located below the lower surface of the substrate mounting portion 11b.
- the reflector 7 has a plate-shaped mounted portion 12 facing in the vertical direction and a curved reflecting portion 13 formed in a curved shape that is displaced forward as it goes downward, and the rear end portion of the mounted portion 12 and the reflecting portion 13 It is continuous with the upper end.
- a light transmission hole 12a is formed in the attached portion 12.
- the reflecting portion 13 is divided into, for example, four portions in the left-right direction (see FIG. 2).
- the inner surfaces of the four portions of the reflecting portion 13 are, in order from the inside to the outside in the left-right direction of the vehicle, the first reflecting surface 13a, the second reflecting surface 13b, the third reflecting surface 13c, and the fourth reflecting surface 13d, respectively. Is formed as.
- the first reflecting surface 13a, the second reflecting surface 13b, the third reflecting surface 13c, and the fourth reflecting surface 13d are all formed on a parabolic surface that is convex diagonally backward and downward.
- the focal lengths of the first reflecting surface 13a, the second reflecting surface 13b, the third reflecting surface 13c, and the fourth reflecting surface 13d are set to, for example, 10 mm to 15 mm.
- the front half of the attached portion 12 of the reflector 7 is attached to the reflector mounting portion 11a of the bracket 6 and is located on the front side of the connecting portion 10 (see FIG. 1).
- the substrate 8 is formed in a horizontally long shape and is attached to the lower surface of the substrate mounting portion 11b of the bracket 6 (see FIG. 2).
- the substrate 8 is connected to a control circuit (not shown).
- the light sources 9, 9, ... Are mounted on the lower surface of the substrate 8 separately from each other to the left and right.
- the light sources 9, 9, 9, ... Are light emitting diodes (LEDs: Light Emitting Diodes), and for example, seven light sources are provided. Therefore, the number n of the light sources 9 is 7.
- Light sources 9, 9, ... Are the second light source 9B, the first light source 9A, the fourth light source 9D, the third light source 9C, the sixth light source 9F, in this order from the inside to the outside in the left-right direction of the vehicle.
- the fifth light source 9E and the seventh light source 9G are used (see FIG. 2).
- the second light source 9B and the first light source 9A are provided as a first shared light source 14A in which light is emitted toward the first reflecting surface 13a, and the fourth light source 9D and the third light source 9C are provided with light.
- a third shared light source 14B is provided as a second shared light source 14B that is emitted toward the second reflecting surface 13b, and the sixth light source 9F and the fifth light source 9E emit light toward the third reflecting surface 13c. It is provided as a shared light source 14C.
- the seventh light source 9G is provided as the non-shared light source 15, and the light emitted from the seventh light source 9G goes to the fourth reflecting surface 13d.
- the lamp unit 5 configured as described above can be tilted in the horizontal and vertical directions with respect to the lamp outer casing 4 via the optical axis adjusting mechanism 16 (see FIG. 1).
- the optical axis adjusting mechanism 16 has aiming screws 17 and 17 and a pivot fulcrum portion (not shown).
- the aiming screws 17 and 17 extend in the front-rear direction, respectively, and have screw portions 17a and 17a at the front end portions.
- the aiming screws 17 and 17 are connected to the connecting portion 10 of the bracket 6 via the nut members 18 and 18 in a state where the screwed portions 17a and 17a are screwed to the nut members 18 and 18, respectively, and the rear end portions thereof are respectively. It is rotatably connected to the lamp housing 2 in a state where it cannot move in the front-rear direction.
- the bracket 6 has a connecting portion 10 connected to the lamp housing 2 via a pivot fulcrum portion, and is rotatable in an arbitrary direction with respect to the lamp housing 2 with the pivot fulcrum portion as a fulcrum.
- the lamp unit 6 In the vehicle headlight 1, when one aiming screw 18 is rotated, the lamp unit 6 is tilted with the other aiming screw 18 and the pivot fulcrum as fulcrums in the direction corresponding to the rotation direction, and the lamp unit 6 is tilted. Aiming adjustments are made.
- the vehicle headlight 1 may be provided with a so-called leveling adjustment mechanism that adjusts the direction of the optical axis that is tilted according to the weight of the vehicle-mounted object.
- the vehicle is provided with a camera (not shown) that captures the state of the vehicle headlight 1 in the irradiation region and a detection unit (not shown) that detects the state of the irradiation region based on the shooting data of the camera.
- the light sources 9, 9, ... Are turned off by the control circuit according to the detection result of the detection unit.
- the image taken by the camera is processed by controlling the turning on and off of the light sources 9, 9, ... According to the detection result of the detection unit.
- the function of the so-called variable high beam (ADB: Adaptive Driving Beam) that changes the light distribution pattern of the high beam is effective by turning off the light source 9 that illuminates the area where the other vehicle such as the preceding vehicle detected by is present.
- different irradiation patterns 20, 20, ... are formed by the light emitted from the light sources 9, 9, ....
- the irradiation patterns 20, 20, ... Are the first irradiation pattern 20A, the second irradiation pattern 20B, the third irradiation pattern 20C, the fourth irradiation pattern 20D, the fifth irradiation pattern 20E, and the sixth irradiation pattern 20, respectively. It is formed as an irradiation pattern 20F and a seventh irradiation pattern 20G.
- the light distribution pattern 21 in the headlight 1 is formed (see FIG. 3). Therefore, the number of irradiation patterns 20 is the same as the number of light sources 9, and the number n of irradiation patterns 20 is 7.
- the irradiation pattern 20F and the seventh irradiation pattern 20G of No. 6 will be described simply as irradiation pattern 20A, irradiation pattern 20B, irradiation pattern 20C, irradiation pattern 20D, irradiation pattern 20E, irradiation pattern 20F, and irradiation pattern 20G, respectively.
- the irradiation patterns 20A, 20B, ..., 20G are patterns that are formed in order from the inside to the outside in the left-right direction of the vehicle and irradiate different regions in the left-right direction.
- the irradiation patterns 20A, 20B, ..., 20G have a pattern in which each half of the irradiation patterns 20 and 20 adjacent to each other in the left-right direction overlap.
- the irradiation patterns 20A, 20C, 20E, 20G and the irradiation patterns 20B, 20D, 20F are slightly vertically arranged. It is shown in a staggered state.
- the configuration of the conventional vehicle headlight X having the ADB function is shown below, and then the configuration of the vehicle headlight 1 is shown.
- FIG. 4 the uppermost figure schematically shows the positional relationship between the reflecting surfaces 13a to 13d and the light sources 9, 9, ..., And is a vehicle headlight 1 and a conventional vehicle front.
- the irradiation pattern is formed in the conventional vehicle headlight X by the same configuration as the vehicle headlight 1 shown at the top of FIG. Is shown.
- the upper figure is a schematic view showing which light source each irradiation pattern is formed by, and the middle figure is each. It is a schematic diagram which shows the relationship between the irradiation pattern and the light source which forms each of these irradiation patterns, and the lower figure is a schematic diagram which shows the shape of a reflector.
- the irradiation patterns arranged in order in the left-right direction are formed by the light reflected by the reflecting surfaces arranged in order in the left-right direction.
- the irradiation patterns 20A and 20B are formed by the light emitted from the first light source 9A and the second light source 9B and reflected by the first reflecting surface 13a, respectively, and the irradiation patterns 20C and 20D are the third, respectively.
- the irradiation patterns 20E and 20F are emitted from the fifth light source 9E and the sixth light source 9F, respectively, and are formed by the light emitted from the light source 9C and the fourth light source 9D and reflected by the second reflecting surface 13b. It is formed by the light reflected by the reflecting surface 13c of the above, and the irradiation pattern 20G is formed by the light emitted from the seventh light source 9G and reflected by the fourth reflecting surface 13d.
- the focal lengths of the first reflecting surface 13a, the second reflecting surface 13b, the third reflecting surface 13c, and the fourth reflecting surface 13d in the vehicle headlight X are, for example, about 20 mm.
- the reflector can maintain the basic configuration of the headlight X for a vehicle. It is desirable to reduce the size. In order to reduce the size of the reflector, it is considered that the focal length of the reflecting surface in the reflector is smaller than the focal length of the reflecting surface in the vehicle headlight X.
- the focal length of the reflecting surface is reduced, the curvature of the reflecting surface becomes larger, the vertical width of the reflector becomes smaller, and it is possible to reduce the size of the vehicle headlight.
- the focal length of the reflecting surface is reduced, the irradiation patterns formed by the light emitted from the light source shift in the left-right direction, and the overlapping of the irradiation patterns changes, so that uneven brightness is likely to occur. ..
- the focal length of the reflecting surface is reduced by about several millimeters with respect to the reflecting surface of the reflecting portion 13X in the vehicle headlight X while maintaining the basic configuration of the vehicle headlight X, for example, the light source 9B
- the irradiation pattern 20B formed by the light emitted from the irradiation pattern 20B shifts away from the irradiation pattern 20A.
- the focal lengths of the first reflecting surface 13a, the second reflecting surface 13b, the third reflecting surface 13c, and the fourth reflecting surface 13d are set as the vehicle headlights.
- the area is made smaller than about several millimeters with respect to the reflecting surface of the reflecting portion 13X in the lamp X, and at least half of the area in the irradiation pattern of the immediately preceding number is at least in the irradiation pattern of the immediately preceding number, as will be specifically described below.
- Adjacent irradiation patterns that overlap half of the area in the left-right direction and do not overlap with the light emitted from the shared light source are formed. In the following, a case where half of the areas in the irradiation pattern overlap each other will be described as an example.
- the irradiation patterns 20A and 20C are formed by the light emitted from the first light source 9A and the second light source 9B and reflected by the first reflecting surface 13a, respectively.
- the irradiation patterns 20B and 20D are formed by the light emitted from the third light source 9C and the fourth light source 9D and reflected by the second reflecting surface 13b, respectively, and the irradiation patterns 20E and 20G are formed by the fifth light source 9E, respectively.
- the light emitted from the sixth light source 9F and reflected by the third reflecting surface 13c, and the irradiation pattern 20F is formed by the light emitted from the seventh light source 9G and reflected by the fourth reflecting surface 13d.
- adjacent irradiation patterns 20A and 20C are formed by the light emitted from the first light source 9A and the second light source 9B constituting the first shared light source 14A, and the third shared light source 14B is formed.
- the adjacent light sources 20B and 20D are formed by the light emitted from the light source 9C and the fourth light source 9D, and are emitted from the fifth light source 9E and the sixth light source 9F constituting the third shared light source 14C.
- Adjacent irradiation patterns 20E and 20F are formed by light. Further, the way the irradiation patterns 20, 20, ...
- half of the area in the irradiation pattern 20B overlaps with the half area in the irradiation pattern 20A, and half the area in the irradiation pattern 20C.
- the half area in the irradiation pattern 20E overlaps the half area in the irradiation pattern 20E, and the half area in the irradiation pattern 20G overlaps the half area in the irradiation pattern 20F.
- the focal lengths of the first reflecting surface 13a, the second reflecting surface 13b, the third reflecting surface 13c, and the fourth reflecting surface 13d are set to, for example, 10 mm to 15 mm.
- At least half of the area of the irradiation pattern 20 of the immediately preceding number is overlapped with at least half of the area of the irradiation pattern 20 of the immediately preceding number in the left-right direction.
- Reflecting surfaces (13a to 20G) are formed so that adjacent irradiation patterns 20 and 20 (20A and 20C, 20B and 20D, 20E and 20G) whose areas do not overlap are formed by the light emitted from the shared light source (14A to 14C).
- the focal length of 13d) is set.
- the areas in the irradiation pattern 20 formed by the light emitted from each light source 9 overlap each other in the left-right direction the areas do not overlap with each other due to the light emitted from the shared light source (14A to 14C).
- Matching irradiation patterns 20 and 20 are formed, respectively. This makes it possible to reduce the focal length of the reflecting surfaces (13a to 13d) after forming the light distribution pattern 21 that is unlikely to cause uneven brightness, and suppress the uneven brightness in the light distribution pattern 21 for vehicles. The size of the headlight 1 can be reduced.
- the focal lengths of the first reflecting surface 13a, the second reflecting surface 13b, the third reflecting surface 13c, and the fourth reflecting surface 13d are set from 10 mm to 15 mm, the curvature of the reflector 7 is sufficiently large. It is possible to reduce the size of the vehicle headlight 1 by sufficiently reducing the size of the reflector 7.
- first shared light source 14A, the second shared light source 14B, and the third shared light source 14C are composed of two light sources 9 and 9, respectively, each reflecting surface 13 corresponding to each shared light source 14 is formed. It is possible to increase the number of reflecting surfaces 13 without making the light source excessively large, and it is possible to improve the degree of freedom in light distribution control while ensuring the miniaturization of the vehicle headlight 1.
- the vehicle headlight 1 is provided with a plurality of shared light sources 14, the number of reflecting surfaces 13 is significantly smaller than the number of light sources 9, and the degree of freedom in light distribution control is improved. It is possible to reduce the size of the vehicle headlight 1 in the left-right direction.
- At least one light source 9 (9G) is provided as the non-shared light source 15, and since the plurality of light sources 9 are composed of the shared light source 14 and the non-shared light source 15, in relation to the plurality of reflecting surfaces 13.
- the degree of freedom in arranging the plurality of light sources 9 is increased, and the degree of freedom in design regarding light distribution can be improved.
- the reflector 7 of the lamp unit 5A is formed with a first reflecting surface 13a, a second reflecting surface 13b, a third reflecting surface 13c, and a fourth reflecting surface 13d (see FIG. 5).
- the focal lengths of the first reflecting surface 13a, the second reflecting surface 13b, the third reflecting surface 13c, and the fourth reflecting surface 13d are set to, for example, 10 mm to 15 mm.
- Light sources 9, 9, ... Are provided. Therefore, the number n of the light sources 9 is 6.
- Light sources 9, 9, ... Are the first light source 9A, the third light source 9C, the second light source 9B, the fifth light source 9E, the fourth light source 9D, in this order from the inside to the outside in the left-right direction of the vehicle. It is said to be the sixth light source 9F.
- the first light source 9A and the sixth light source 9F are provided as non-shared light sources 15 and 15, respectively, and the light emitted from the first light source 9A goes to the first reflecting surface 13a and is emitted from the sixth light source 9F.
- the light generated goes to the fourth reflecting surface 13d.
- the third light source 9C and the second light source 9B are provided as a first shared light source 14D in which light is emitted toward the second reflecting surface 13b, and the fifth light source 9E and the fourth light source 9D are provided with light. It is provided as a second shared light source 14E emitted toward the third reflecting surface 13c.
- At least half of the area in the irradiation pattern of the immediately preceding number overlaps at least half of the area of the irradiation pattern of the immediately preceding number in the left-right direction, and adjacent irradiation in which the areas do not overlap due to the light emitted from the shared light source.
- Each pattern is formed (see FIG. 6). Note that FIG. 6 describes a case where half of the areas in the irradiation pattern overlap each other as an example.
- the irradiation patterns 20A and 20C are formed by the light emitted from the second light source 9B and the third light source 9C and reflected by the second reflecting surface 13b, respectively, and the irradiation pattern 20B is emitted from the light source 9A. It is formed by the light reflected by the first reflecting surface 13a, and the irradiation patterns 20D and 20F are formed by the light emitted from the fourth light source 9D and the fifth light source 9E and reflected by the third reflecting surface 13c, respectively. , The irradiation pattern 20E is formed by the light emitted from the sixth light source 9F and reflected by the fourth reflecting surface 13d.
- adjacent irradiation patterns 20A and 20C are formed by the light emitted from the second light source 9B and the third light source 9C constituting the first shared light source 14D, and the fourth shared light source 14E is formed.
- the adjacent irradiation patterns 20D and 20F are formed by the light emitted from the light source 9D and the fifth light source 9E.
- the way of overlapping the irradiation patterns 20, 20, ... Is the same as that of the lamp unit 5
- half of the area in the irradiation pattern 20B overlaps with the half area in the irradiation pattern 20A, and half the area in the irradiation pattern 20C is the irradiation pattern.
- the half area in the irradiation pattern 20B overlaps the half area in the irradiation pattern 20C
- the half area in the irradiation pattern 20E overlaps the half area in the irradiation pattern 20D
- the half area in the irradiation pattern 20F overlaps half of the area in the irradiation pattern 20E.
- the lamp unit 5A even if the focal length of the reflecting surface is reduced, at least half of the area in the irradiation pattern of the immediately preceding number is at least half of the irradiation pattern of the immediately preceding number.
- adjacent irradiation patterns that overlap the areas in the left-right direction and the areas do not overlap due to the light emitted from the shared light source, uneven brightness is less likely to occur in the light distribution of the vehicle headlight 1. ..
- a first reflecting surface 13e and a second reflecting surface 13f are formed on the reflector 7 of the lamp unit 5B (see FIG. 7).
- the focal lengths of the first reflecting surface 13e and the second reflecting surface 13f are set to, for example, 10 mm to 15 mm.
- Light sources 9, 9, ... Are provided. Therefore, the number n of the light sources 9 is 6.
- Light sources 9, 9, ... Are the first light source 9A, the second light source 9B, the third light source 9C, the fourth light source 9D, the fifth light source 9E, in this order from the inside to the outside in the left-right direction of the vehicle. It is said to be the sixth light source 9F.
- the first light source 9A, the second light source 9B, and the third light source 9C are provided as a first shared light source 14F in which light is emitted toward the first reflecting surface 13e, and the fourth light source 9D and the fifth light source 9D.
- the light source 9E and the sixth light source 9F are provided as a second shared light source 14G in which light is emitted toward the second reflecting surface 13f.
- At least half of the area in the irradiation pattern of the immediately preceding number overlaps at least half of the area of the irradiation pattern of the immediately preceding number in the left-right direction, and adjacent irradiation in which the areas do not overlap due to the light emitted from the shared light source.
- Each pattern is formed (see FIG. 8). Note that FIG. 8 describes a case where half of the areas in the irradiation pattern overlap each other as an example.
- the irradiation patterns 20A, 20C, and 20E are formed by the light emitted from the first light source 9A, the second light source 9B, and the third light source 9C, respectively, and reflected by the first reflecting surface 13e, and are irradiated.
- the patterns 20B, 20D, and 20F are formed by the light emitted from the fourth light source 9D, the fifth light source 9E, and the sixth light source 9F, respectively, and reflected by the second reflecting surface 13f.
- adjacent irradiation patterns 20A, 20C, and 20E are formed by the light emitted from the first light source 9A, the second light source 9B, and the third light source 9C constituting the first shared light source 14F, and the second light source is formed.
- Adjacent irradiation patterns 20B, 20D, and 20F are formed by the light emitted from the fourth light source 9D, the fifth light source 9E, and the sixth light source 9F constituting the shared light source 14G. Further, the way of overlapping the irradiation patterns 20, 20, ...
- half of the area in the irradiation pattern 20B overlaps with the half area in the irradiation pattern 20A
- half the area in the irradiation pattern 20C is the irradiation pattern. It overlaps the half area in the irradiation pattern 20B
- the half area in the irradiation pattern 20D overlaps the half area in the irradiation pattern 20C
- the half area in the irradiation pattern 20E overlaps the half area in the irradiation pattern 20D
- the half area in the irradiation pattern 20F overlaps half of the area in the irradiation pattern 20E.
- the lamp unit 5B even if the focal length of the reflecting surface is reduced, at least half of the area in the irradiation pattern of the immediately preceding number is at least half of the irradiation pattern of the immediately preceding number.
- adjacent irradiation patterns that overlap the areas in the left-right direction and the areas do not overlap due to the light emitted from the shared light source, uneven brightness is less likely to occur in the light distribution of the vehicle headlight 1. ..
- the focal length of the reflecting surface (13e, 13f) is formed in the light distribution pattern 21 which is unlikely to cause uneven brightness. It becomes possible to reduce the size of the headlight 1 for a vehicle while suppressing uneven brightness in the light distribution pattern 21.
- the number of reflecting surfaces and the number of light sources in the vehicle headlight 1 are not limited to the number of the above-mentioned lighting fixture units 5, 5A and 5B, and other configurations can be used if there are a plurality of them. .. Further, the arrangement position of the light source with respect to the reflecting surface is not limited to the arrangement position of the lamp units 5, 5A and 5B, and a single or a plurality of light sources can be arbitrarily arranged with respect to the plurality of reflecting surfaces.
- the above shows an example in which half of the area of the irradiation pattern of the immediately preceding number overlaps with half of the area of the irradiation pattern of the immediately preceding number, but the overlapping area may be approximately half, and the overlapping area may be approximately half. May be more than half.
- a light distribution pattern in which a part of the irradiation pattern of the immediately preceding number overlaps a part of the irradiation pattern of the immediately preceding number, and the areas of these overlapping areas are substantially the same. It can also be applied to the example in which is formed.
Abstract
Description
Claims (5)
- 左右方向において並ぶ複数の反射面を有するリフレクターと、
左右方向において並び前記反射面のうち何れかの前記反射面へ向けて光を出射するn個の光源とを備え、
隣り合って位置された少なくとも二つの前記光源が同一の前記反射面へ向けて光を出射する共有光源として設けられ、
前記n個の光源からそれぞれ出射される光によって左右方向において異なる領域を照射するn個の照射パターンが形成され、
前記n個の照射パターンが左右方向において順に第1の照射パターンから第nの照射パターンとされ、
直後の番号の前記照射パターンにおける少なくとも半分のエリアが直前の番号の前記照射パターンにおける少なくとも半分のエリアに左右方向において重なる状態にされ、
前記共有光源から出射された光によってエリアが重ならない隣り合う前記照射パターンがそれぞれ形成されるように前記複数の反射面の焦点距離がそれぞれ設定された
車輌用前照灯。 - 前記焦点距離が10mmから15mmにされた
請求項1に記載の車輌用前照灯。 - 前記共有光源が二つの前記光源によって構成された
請求項1又は請求項2に記載の車輌用前照灯。 - 前記共有光源が複数設けられた
請求項1、請求項2又は請求項3に記載の車輌用前照灯。 - 少なくとも一つの前記光源が前記共有光源以外の非共有光源として設けられた
請求項1、請求項2、請求項3又は請求項4に記載の車輌用前照灯。
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US17/612,342 US11674658B2 (en) | 2019-05-22 | 2020-04-25 | Headlamp for vehicle |
JP2021520672A JP7350846B2 (ja) | 2019-05-22 | 2020-04-25 | 車輌用前照灯 |
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Publication number | Priority date | Publication date | Assignee | Title |
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JP2013243080A (ja) | 2012-05-22 | 2013-12-05 | Koito Mfg Co Ltd | 車両用前照灯 |
JP2017147131A (ja) * | 2016-02-17 | 2017-08-24 | 株式会社小糸製作所 | 車両用灯具 |
JP2017224468A (ja) * | 2016-06-15 | 2017-12-21 | 株式会社小糸製作所 | 車両用灯具 |
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FR2984457B1 (fr) * | 2011-12-19 | 2023-08-11 | Valeo Vision | Module d'eclairage comprenant au moins deux sources lumineuses installees de maniere sensiblement orthogonale |
JP5801731B2 (ja) * | 2012-01-24 | 2015-10-28 | 株式会社小糸製作所 | 車輌用前照灯 |
FR2991251B1 (fr) | 2012-06-04 | 2016-01-29 | Valeo Vision | Module d'eclairage a sources lumineuses ecartees, pour mise en oeuvre d'une fonction adb |
CN107255249B (zh) | 2013-05-27 | 2020-07-14 | 株式会社小糸制作所 | 车辆用灯具 |
JP6254390B2 (ja) * | 2013-09-05 | 2017-12-27 | 株式会社小糸製作所 | 車両用ランプユニット |
WO2016024489A1 (ja) * | 2014-08-11 | 2016-02-18 | 株式会社小糸製作所 | 車両用前照灯 |
JP6448277B2 (ja) | 2014-09-29 | 2019-01-09 | 株式会社小糸製作所 | 車両用灯具 |
US9873372B2 (en) * | 2014-12-19 | 2018-01-23 | Sl Corporation | Adaptive driving beam headlamp for vehicle |
CN107735615B (zh) * | 2015-06-29 | 2021-02-09 | 株式会社小糸制作所 | 车辆用灯具 |
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JP2013243080A (ja) | 2012-05-22 | 2013-12-05 | Koito Mfg Co Ltd | 車両用前照灯 |
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