WO2022224408A1 - 前照灯モジュール及び前照灯装置 - Google Patents
前照灯モジュール及び前照灯装置 Download PDFInfo
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- WO2022224408A1 WO2022224408A1 PCT/JP2021/016311 JP2021016311W WO2022224408A1 WO 2022224408 A1 WO2022224408 A1 WO 2022224408A1 JP 2021016311 W JP2021016311 W JP 2021016311W WO 2022224408 A1 WO2022224408 A1 WO 2022224408A1
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- light
- reflecting surface
- distribution pattern
- light distribution
- headlight
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- 230000003287 optical effect Effects 0.000 claims abstract description 34
- 238000000926 separation method Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 17
- 230000005484 gravity Effects 0.000 description 6
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- 230000001678 irradiating effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
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- 238000004088 simulation Methods 0.000 description 1
- 239000012780 transparent material Substances 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
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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
- F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
- F21S41/32—Optical layout thereof
- F21S41/36—Combinations of two or more separate reflectors
- F21S41/365—Combinations of two or more separate reflectors successively reflecting the light
-
- 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
- F21S41/20—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
- F21S41/30—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
- F21S41/322—Optical layout thereof the reflector using total internal reflection
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
- F21W2102/00—Exterior vehicle lighting devices for illuminating purposes
- F21W2102/10—Arrangement or contour of the emitted light
- F21W2102/13—Arrangement or contour of the emitted light for high-beam region or low-beam region
- F21W2102/135—Arrangement or contour of the emitted light for high-beam region or low-beam region the light having cut-off lines, i.e. clear borderlines between emitted regions and dark regions
Definitions
- the present disclosure relates to a headlight module and a headlight device having the headlight module.
- Light distribution refers to the luminous intensity distribution of a light source with respect to space. In other words, the light distribution is the spatial distribution of light emitted from the light source.
- luminous intensity indicates the degree of intensity of light emitted by a light emitter. Luminous intensity is the luminous flux passing through a small solid angle in a direction divided by the solid angle.
- the light distribution pattern stipulated for automobile low beams in road traffic regulations has a horizontally long shape with a narrow vertical direction.
- the cut-off line which is the upper boundary line of the light distribution pattern, must be clear. That is, it is required that the area above the cutoff line (that is, the outside of the light distribution pattern) be dark and the area below the cutoff line (that is, inside the light distribution pattern) be bright, that is, that the cutoff line be clear.
- the "cutoff line” refers to the dividing line between light and dark that is created when the light emitted from the headlight device is applied to a wall or screen, and is the dividing line on the upper side of the light distribution pattern. is.
- the “cutoff line” is the boundary line between light and dark on the upper side of the light distribution pattern.
- the cut-off line is the boundary line between the upper bright region of light within the light distribution pattern and the dark region of light outside the light distribution pattern.
- a cut-off line is a term used to describe the function of adjusting the emission direction of light emitted from the headlight device when vehicles pass each other.
- the light from the "passing headlight device” is also called the "low beam” described above.
- the area below the cutoff line (that is, the area inside the light distribution pattern and slightly below the cutoff line) is required to be the area with the maximum illuminance.
- This area of maximum illumination is called a "high illumination area”.
- the region below the cutoff line means the upper region in the light distribution pattern, and corresponds to a portion that illuminates a long distance in the headlamp device.
- the cut-off line should not have large chromatic aberration, blurring, and the like.
- “Blurring occurs in the cut-off line” means that the cut-off line becomes unclear.
- An object of the present disclosure is to provide a headlamp module and a headlamp device with high light utilization efficiency.
- a headlamp module includes a light source that emits first light, and a part of the first light that is reflected to cut light other than the part of the light. a first reflective surface that forms light of a first light distribution pattern having an off-line; and a second reflective surface that inclines, the second reflective surface reflecting the second light composed of the part of the light reflected by the first reflective surface to form the second light distribution pattern. to add the light of the second light distribution pattern to the light of the first light distribution pattern.
- FIG. 1 is a schematic diagram showing a configuration of a headlamp module according to Embodiment 1;
- FIG. (A) to (C) are a side view, a front view, and a top view showing part of the configuration of the headlamp module according to Embodiment 1.
- FIG. 4 is a diagram showing optical paths of light emitted from the light source of the headlamp module according to Embodiment 1.
- FIG. FIG. 4 is a diagram showing the illuminance distribution of the basic light distribution pattern of the headlamp module according to Embodiment 1 by contour display.
- FIG. 4 is a diagram showing the illuminance distribution of the additional light distribution pattern of the headlamp module according to Embodiment 1 by contour display;
- FIG. 5 is a diagram showing, in contour display, the illuminance distribution of a combined light distribution pattern obtained by superimposing the light of the basic light distribution pattern and the light of the additional light distribution pattern of the headlamp module according to Embodiment 1;
- FIG. 6 is a schematic diagram showing the configuration of a headlamp module according to Embodiment 2;
- (A) to (C) are a side view, a front view, and a top view showing the configuration of the light guiding and projecting optical element of the headlamp module according to Embodiment 2.
- FIG. FIG. 9 is a diagram showing optical paths of light emitted from the light source of the headlamp module according to Embodiment 2;
- FIG. 11 is a top view schematically showing a configuration example of a headlamp device according to Embodiment 3;
- the X-axis is a coordinate axis parallel to the left-right direction of the vehicle.
- the right direction is the +X-axis direction
- the left direction is the -X-axis direction.
- “forward” is the traveling direction of the vehicle. In other words, “forward” is the direction in which the headlamp device emits light.
- the Y-axis is a coordinate axis parallel to the vertical direction of the vehicle.
- the upward direction of the vehicle is the +Y-axis direction
- the downward direction of the vehicle is the -Y-axis direction. That is, the +Y axis side of the vehicle is the sky side, and the -Y axis side is the ground (ie road) side.
- the +Z-axis direction is the traveling direction of the vehicle, and the -Z-axis direction is the direction opposite to the traveling direction. In the following description, the "+Z-axis direction" is called “forward” and the -Z-axis direction is called “backward.”
- the +Z-axis direction is the direction in which the headlight module emits light.
- the ZX plane is a plane parallel to the road surface. This is because the road surface is generally considered to be a "horizontal plane”. Therefore, the ZX plane is considered as the "horizontal plane”.
- a “horizontal plane” is a plane perpendicular to the direction of gravity. However, the road surface may incline with respect to the traveling direction of the vehicle. That is, this is the case when the road surface is uphill or downhill. In these cases, the "horizontal plane” is considered as a plane parallel to the road surface. That is, the "horizontal plane” is not a plane perpendicular to the direction of gravity.
- the “left-right direction” is the width direction of the road (that is, the road surface).
- the “horizontal plane” is considered as the plane perpendicular to the direction of gravity. For example, even if the road surface is tilted in the left-right direction and the vehicle is perpendicular to the road surface in the left-right direction, it is considered equivalent to the state in which the vehicle is tilted in the left-right direction with respect to the "horizontal plane".
- the "horizontal plane” will be explained as a plane perpendicular to the direction of gravity. That is, the ZX plane will be described as a plane perpendicular to the direction of gravity.
- a tube light source such as an incandescent lamp, a halogen lamp, or a fluorescent lamp may be used.
- a semiconductor light source such as a light emitting diode (hereinafter also referred to as LED (Light Emitting Diode)) or a laser diode may be used. That is, the light source of the present disclosure is not particularly limited, and any light source may be used.
- a semiconductor light source has more directivity than a conventional halogen bulb (lamp light source), and can reduce the size and weight of the optical system.
- the light source will be described as a semiconductor light source (specifically, an LED).
- the "light distribution pattern” indicates the shape of the luminous flux and the intensity distribution of the light due to the direction of the light emitted from the light source.
- the term “light distribution pattern” is also used to mean an illuminance pattern on an irradiation surface (for example, the irradiation surface 9 shown in FIGS. 4 to 6) described below.
- the “light distribution” is the distribution of light intensity with respect to the direction of light emitted from the light source.
- the term “light distribution” is also used to mean the illuminance distribution on the irradiation surface 9 shown in FIGS. 4 to 6, which will be described later.
- the headlight module of the present disclosure is applied to a low beam or high beam of a vehicle headlight device.
- the headlamp module of the present disclosure is also applied to a low beam or high beam of a motorcycle headlamp device.
- the headlamp module of the present disclosure is also applied to low beam or high beam, etc. of headlamp devices for other vehicles such as three-wheeled or four-wheeled vehicles.
- a low-beam light distribution pattern of a motorcycle headlamp is a horizontal straight line with a cutoff line extending in the left-right direction of the vehicle (that is, in the X-axis direction). Also, the area below the cutoff line (that is, inside the light distribution pattern) is the brightest.
- a three-wheeled vehicle is an automatic three-wheeled vehicle called a gyro.
- a "motorcycle called a gyro" is a three-wheeled scooter with one front wheel and two rear wheels.
- a motorized tricycle corresponds to a motorized bicycle.
- a motor tricycle has a rotation axis near the center of the vehicle body, and can tilt most of the vehicle body, including the front wheels and the driver's seat, in the left-right direction. This mechanism allows the tricycle to shift its center of gravity inward when turning, similar to a motorcycle.
- FIG. 1 is a schematic diagram showing the configuration of a headlamp module 100 according to Embodiment 1.
- FIG. 1 is a diagram of the headlamp module 100 viewed from the right direction (+X-axis direction).
- the headlamp module 100 has a light source 1, a first reflector 21, a second reflector 22, a third reflector 23 and a fourth reflector 24.
- the light source 1 has a light emitting surface 11 .
- the light source 1 emits light for illuminating the front of the vehicle from the light emitting surface 11 .
- the light source 1 emits light in the -Y-axis direction.
- the light source 1 uses LED as a light emission source, for example. It should be noted that the light source 1 is not limited to LEDs, and other types of light emitting sources may be used.
- the first reflector 21 , the second reflector 22 , the third reflector 23 and the fourth reflector 24 are supported by supporting members (not shown) provided in the headlamp module 100 .
- FIGS. 1 and 2A to 2C are a side view, a front view, and a top view showing part of the configuration of the headlamp module 100 according to Embodiment 1.
- FIG. As shown in FIGS. 1 and 2A to 2C, the first reflector 21 is provided on the -Y-axis side of the light source 1. As shown in FIG. The first reflecting surface 21 a reflects part of the light emitted from the light source 1 and directs it toward the second reflector 22 .
- the first reflector 21 has a first reflecting surface 21a.
- the first reflecting surface 21a is, for example, a mirror surface.
- the first reflecting surface 21a has a curved shape that reflects incident light.
- the first reflecting surface 21a has a concave surface corresponding to the Y-axis direction (specifically, the YZ plane).
- the first reflecting surface 21a is formed with a curved surface facing the light source 1 with a concave surface.
- the first reflecting surface 21a has a cutoff line forming portion 211.
- the cut-off line forming part 211 does not reflect part of the light emitted from the light source 1 .
- the cut-off line forming unit 211 converts the light of the first light distribution pattern (for example, the basic light distribution pattern PD1 shown in FIG. 4 to be described later) (for example, the light R1b shown in FIG. 3 to be described later) into the cut-off line. , R1c).
- the cut-off line forming portion 211 is provided at the end of the first reflecting surface 21a in the -Y-axis direction.
- the basic light distribution pattern PD ⁇ b>1 has a cutoff line 91 (see FIG. 4 ) corresponding to the shape of the cutoff line forming portion 211 .
- the cut-off line forming portion 211 has a stepped ridgeline. Specifically, as shown in FIG. 2B, the cutoff line forming portion 211 has a stepped shape composed of a first ridgeline portion 211a, a second ridgeline portion 211b, and a third ridgeline portion 211c. have.
- the second ridgeline portion 211b has a different position in the direction of the optical axis C1.
- the third ridgeline portion 211c connects the end portion of the first ridgeline portion 211a and the end portion of the second ridgeline portion 211b, and is inclined with respect to the first ridgeline portion 211a and the second ridgeline portion 211b. ing.
- the cutoff line forming part 211 with a stepped shape Light of the basic light distribution pattern PD1 having a cutoff line 91 with a stepped shape is formed by the cutoff line forming part 211 with a stepped shape.
- the cut-off line forming portion 211 can be realized even if it does not have a stepped ridgeline.
- the cut-off line forming portion 211 may have a linear ridgeline parallel to the X-axis direction.
- the third reflector 23 has a third reflecting surface 23a.
- the third reflecting surface 23a is, for example, a mirror surface.
- the third reflecting surface 23a has a curved shape that reflects incident light.
- the third reflecting surface 23a has a concave surface corresponding to the Y-axis direction (specifically, the YZ plane).
- the third reflecting surface 23a is formed with a curved surface that is concave toward the first reflecting surface 21a and the second reflecting surface 22a.
- the third reflecting surface 23a has a focal position near the cut-off line forming portion 211, which is the end of the first reflecting surface 21a in the -Y-axis direction.
- the third reflective surface 23 a is arranged at a position farther from the light source 1 than the distance between the first reflective surface 21 a and the light source 1 .
- the third reflecting surface 23a directs light emitted from the light source 1 that is not reflected by the first reflecting surface 21a forward (that is, in the +Z-axis direction). Note that the headlamp module 100 can be realized without having the third reflector 23 .
- the second reflector 22 has a second reflecting surface 22a.
- the second reflector 22 faces the first reflector 21 in the Z-axis direction. Therefore, the second reflecting surface 22a is arranged to face the first reflecting surface 21a.
- the second reflecting surface 22a is, for example, a mirror surface.
- the second reflecting surface 22a has a curved shape that reflects incident light.
- the second reflecting surface 22a has a concave surface corresponding to the Y-axis direction (specifically, the YZ plane). In other words, the second reflecting surface 22a is formed with a curved surface that is concave toward the first reflecting surface 21a.
- the second reflecting surface 22a is arranged at an angle ⁇ from the X-axis direction to the -Z-axis direction.
- the second reflecting surface 22a is inclined with respect to the optical axis C1 of the light source 1 such that the further away from the light source 1 along the optical axis C1, the farther away from the optical axis C1.
- the optical axis C ⁇ b>1 passes through the center of the light emitting surface 11 of the light source 1 and is perpendicular to the light emitting surface 11 .
- the second reflecting surface 22a receives second light (for example, second light R1a shown in FIG. 3 to be described later) made of light reflected by the first reflecting surface 21a (for example, light R1a shown in FIG.
- the second reflecting surface 22a forms light (for example, light R3 shown in FIG. 3 to be described later) of the second light distribution pattern (for example, additional light distribution pattern PD2 shown in FIG. 5 to be described later). do.
- the fourth reflector 24 is arranged adjacent to the third reflector 23 in the Z-axis direction.
- the fourth reflector 24 has a fourth reflecting surface 24a.
- the fourth reflecting surface 24a is, for example, a mirror surface.
- the fourth reflecting surface 24a has a curved shape that reflects incident light.
- the fourth reflecting surface 24a has a concave surface corresponding to the Y-axis direction (specifically, the YZ plane). In other words, the fourth reflecting surface 24a is formed with a curved surface that is concave toward the first reflecting surface 21a and the second reflecting surface 22a.
- the fourth reflective surface 24 a is arranged at a position farther from the light source 1 than the distance between the second reflective surface 22 a and the light source 1 .
- the fourth reflecting surface 24a directs the light reflected by the second reflecting surface 22a forward (that is, +Z-axis direction). Note that the headlamp module 100 can be realized without having the fourth reflector 24 .
- FIG. 3 is a diagram showing optical paths of light emitted from the light source 1 of the headlamp module 100 according to the first embodiment.
- the light other than the light R1a travels so as to skim the vicinity of the cutoff line forming portion 211 and is not reflected by the first reflecting surface 21a.
- the lights R1b and R1c of the basic light distribution pattern PD1 are formed.
- the lights R1b and R1c of the basic light distribution pattern PD1 are parallel to the light emitting surface 11 of the light source 1 (that is, perpendicular to the optical axis C1), pass through the plane S1 including the cutoff line forming portion 211, and undergo the third reflection. It is reflected by the surface 23a.
- the light beams R1b and R1c of the basic light distribution pattern PD1 are reflected by the third reflecting surface 23a and irradiated onto the irradiation surface 9 as light beams R4a and R4b.
- the irradiation surface 9 is in a conjugate relationship with the plane S1 in the Y-axis direction. That is, the stepped shape of the cutoff line forming portion 211 corresponds to the stepped shape of the cutoff line 91 of the basic light distribution pattern PD1 on the irradiation surface 9 . Therefore, the light beam R1 transmitted through the plane S1 so as to graze the cutoff line forming portion 211 is irradiated to the position of the cutoff line 91 on the irradiation surface 9 .
- the light R1a shown in FIG. 3 is reflected by the first reflecting surface 21a and travels toward the second reflecting surface 22a as the second light R2.
- the second light R2 is reflected by the second reflecting surface 22a and travels toward the fourth reflecting surface 24a as the light R3 of the additional light distribution pattern PD2.
- the light R3 of the additional light distribution pattern PD2 overlaps the lights R1b and R1c of the basic light distribution pattern PD1.
- the second reflecting surface 22a adds the light R3 of the additional light distribution pattern PD2 to the light R1b and R1c of the basic light distribution pattern.
- the light R3 of the additional light distribution pattern PD2 is reflected by the fourth reflecting surface 24a and irradiated onto the irradiation surface 9 as light R5.
- the light R3 of the additional light distribution pattern PD2 is condensed in a direction away from the cut-off line forming portion 211 in the ⁇ Z-axis direction on the plane S1 compared to the lights R1b and R1c of the basic light distribution pattern PD1. Therefore, the light R5 is irradiated on the irradiation surface 9 at a position 92 slightly distant in the -Y-axis direction from the cutoff line 91 as compared with the light R4a and R4b.
- the curvature of the fourth reflecting surface 24a is different from the curvature of the third reflecting surface 23a. Specifically, the curvature of the fourth reflecting surface 24a is smaller than the curvature of the third reflecting surface 23a.
- the light R3 of the additional light distribution pattern PD2 is projected. It is possible to prevent a position on the surface 9 that is far away from the cutoff line 91 in the ⁇ Y-axis direction from being irradiated.
- FIG. 4 is a contour diagram showing the illuminance distribution of the basic light distribution pattern PD1 of the headlamp module 100 according to the first embodiment. This illuminance distribution is obtained by simulation.
- Contour display is to display in a contour map.
- a “contour map” is a diagram in which points of the same value are connected by lines. As can be seen from FIG. 4, the uneven cut-off line 91 of the basic light distribution pattern PD1 is clearly projected.
- FIG. 5 is a contour diagram showing the illuminance distribution of the additional light distribution pattern PD2 of the headlamp module 100 according to the first embodiment. 4 and 5, it can be seen that the additional light distribution pattern PD2 forms a light distribution pattern with a wider range than the basic light distribution pattern PD1.
- the light reflected by the first reflecting surface 21a does not become loss light, as compared with a configuration in which a shade is used to form light of a light distribution pattern having a cutoff line. , is used as the light R3 of the additional light distribution pattern PD2. Therefore, the light that could not be used can be effectively used, and the headlamp module 100 with high light utilization efficiency can be provided.
- the additional light distribution pattern PD2 does not have a cutoff line. That is, the boundary line of the +Y-axis direction end of the additional light distribution pattern PD2 is blurred.
- FIG. 6 is a contour representation of the illuminance distribution of the combined light distribution pattern obtained by superimposing the light of the basic light distribution pattern PD1 and the light of the additional light distribution pattern PD2 of the headlamp module 100 according to the first embodiment.
- FIG. 4 is a diagram showing; The cutoff line 91 is clearly projected in the synthetic light distribution pattern shown in FIG. Further, by adding the light R3 of the additional light distribution pattern PD2 to the light R1b and R1c of the basic light distribution pattern PD1 (see FIG. 3), the light of the synthetic light distribution pattern with a wide irradiation range is emitted.
- the second light R2 composed of the light R1a reflected by the first reflecting surface 21a shown in FIG.
- the light R1a is used as the light R3 of the additional light distribution pattern PD2. That is, the light R1a reflected by the first reflecting surface 21a can be irradiated to an effective range as the light R3 of the additional light distribution pattern PD2, which is part of the light distribution pattern of the vehicle headlamp module 100. .
- the second reflecting surface 22a forms the light R3 of the additional light distribution pattern PD2 and converts the light R3 of the additional light distribution pattern PD2 into the light R1b of the basic light distribution pattern PD1. , R1c.
- part of the light reflected by the first reflecting surface 21a does not become lost light, and is added to the light distribution pattern, as compared with a configuration in which a shade is used to form light of a light distribution pattern having a cutoff line. It is used as the light R3 of the light pattern PD2. Therefore, the headlamp module 100 with high light utilization efficiency can be provided.
- the first reflecting surface 21a has the cutoff line forming portion 211, and the cutoff line forming portion 211 has a stepped ridgeline.
- the stepped cut-off line 91 required for low beams for automobiles can be formed.
- the curvature of the fourth reflecting surface 24a is different from the curvature of the third reflecting surface 23a. This prevents the light R3 of the additional light distribution pattern PD2 from irradiating a position on the irradiation surface 9 far away from the cutoff line 91 in the -Y-axis direction.
- FIG. 7 is a schematic diagram showing the configuration of a headlamp module 200 according to a second embodiment.
- FIG. 7 is a diagram of the headlamp module 200 viewed from the right direction (+X-axis direction).
- the headlamp module 200 has a light source 1 and a light guide projection optical element 4 .
- the light guide projection optical element 4 is arranged on the +Y-axis side of the light source 1 . Further, the light guiding and projecting optical element 4 is filled with a refractive material, for example.
- the light guiding and projecting optical element 4 includes an incident surface 40, a first reflecting surface 41, a second reflecting surface 42, and a third reflecting surface 43. , a fourth reflecting surface 44 , and an exit surface 45 .
- the light emitted from the light source 1 enters from the incident surface 40 of the light guiding and projecting optical element 4 and is condensed at an arbitrary position in the +Y-axis direction.
- the first reflecting surface 41 reflects part of the light incident on the light guide projection optical element 4 via the incident surface 40 .
- the first reflecting surface 41 does not reflect part of the reflected light that has entered through the incident surface 40, so that the light R1b and R1c of the basic light distribution pattern having a cutoff line (see FIG. 9 described later).
- the first reflective surface 41 has a cutoff line forming portion 411 .
- the cut-off line forming portion 411 has a linear ridge line (specifically, a straight line in the X-axis direction).
- the lights R1b and R1c of the basic light distribution pattern having a linear cutoff line extending in the X-axis direction are formed.
- the cut-off line forming portion 411 may have a stepped ridge line, like the cut-off line forming portion 211 shown in FIGS. 2B and 2C. That is, the basic light distribution pattern in the second embodiment may be the same as the basic light distribution pattern PD1 shown in FIG. 4 described above.
- the third reflecting surface 43 is formed with a curved surface that is concave toward the first reflecting surface 41 and the second reflecting surface 42 .
- the third reflecting surface 43 is arranged at a position farther from the light source 1 than the distance between the first reflecting surface 41 and the light source 1 .
- the third reflecting surface 43 directs the light emitted from the light source 1 that is not reflected by the first reflecting surface 41 toward the emission surface 45 .
- the third reflecting surface 43 guides the light beams R1b and R1c of the basic light distribution pattern to the exit surface 45 . Note that the light guiding and projecting optical element 4 can be realized without having the third reflecting surface 43 .
- the second reflecting surface 42 is arranged to face the first reflecting surface 41 .
- the second reflecting surface 42 is formed with a curved surface facing the concave surface toward the first reflecting surface 41 .
- the second reflecting surface 42 is inclined with respect to the optical axis C1 of the light source 1 so that the further away from the light source 1 along the optical axis C1, the farther away from the optical axis C1.
- the second reflecting surface 42 reflects the second light R2 (see FIG. 9 described later) composed of the light R1a (see FIG. 9 described later) reflected by the first reflecting surface 41 .
- the second reflecting surface 42 forms light R3 (see FIG. 9 described later) of the additional light distribution pattern.
- the additional light distribution pattern in the second embodiment is, for example, the same as the additional light distribution pattern PD2 shown in FIG. 5 described above.
- the fourth reflecting surface 44 is arranged adjacent to the third reflecting surface 43 .
- the fourth reflecting surface 44 is formed by a curved surface that is concave toward the first reflecting surface 41 and the second reflecting surface 42 .
- the fourth reflecting surface 44 is arranged at a position farther from the light source 1 than the distance between the second reflecting surface 42 and the light source 1 .
- the fourth reflecting surface 44 directs the light reflected by the second reflecting surface 42 to the exit surface 45 .
- the fourth reflecting surface 44 guides the light R3 of the additional light distribution pattern to the exit surface 45 . Note that the light guiding and projecting optical element 4 can be realized without having the fourth reflecting surface 44 .
- FIG. 9 is a diagram showing optical paths of light emitted from the light source 1 of the headlamp module 200 according to the second embodiment.
- Light emitted from the light source 1 is condensed in the vicinity of the cut-off line forming portion 411 by the incident surface 40 .
- Part of the light R1a condensed in the vicinity of the cut-off line forming portion 411 is reflected by the first reflecting surface 41. As shown in FIG.
- the lights R1b and R1c of the basic light distribution pattern are formed.
- Lights R1b and R1c of the basic light distribution pattern are parallel to the light emitting surface 11 of the light source 1 (that is, orthogonal to the optical axis C1), pass through the plane S21 including the cutoff line forming portion 411, and pass through the third reflecting surface. Reflected at 43 .
- the lights R1b and R1c of the basic light distribution pattern are respectively reflected by the third reflecting surface 43 and irradiated onto the irradiation surface 9 as lights R4a and R4b.
- the irradiation surface 9 is in a conjugate relationship with the plane S21 in the Y-axis direction. That is, the shape of the cutoff line forming portion 411 corresponds to the shape of the cutoff line 91 of the basic light distribution pattern PD1 on the irradiation surface 9 . Therefore, the light R1b of the basic light distribution pattern that has passed through the plane S21 so as to graze the cutoff line forming portion 411 is irradiated to the position of the cutoff line 91 on the irradiation surface 9 .
- the light R1c of the basic light distribution pattern shown in FIG. 9 is condensed in a direction away from the cut-off line forming portion 411 in the +Z-axis direction on the plane S21 compared to the light R1b of the basic light distribution pattern. Therefore, the light R1c of the basic light distribution pattern is irradiated on the irradiation surface 9 at a position farther away from the cut-off line 91 in the -Y-axis direction than the light R1b of the basic light distribution pattern. Therefore, the light R4b is irradiated on the irradiated surface 9 at a position slightly distant from the cutoff line 91 in the -Y-axis direction compared to the light R4a.
- the light R1a shown in FIG. 9 is reflected by the first reflecting surface 21a and travels toward the second reflecting surface 42 as the second light R2.
- the second light R2 is reflected by the second reflecting surface 42 and travels toward the fourth reflecting surface 44 as light R3 of the additional light distribution pattern.
- Light R3 of the additional light distribution pattern overlaps light R1b and R1c of the basic light distribution pattern.
- the second reflecting surface 42 adds the light R3 of the additional light distribution pattern to the light R1b and R1c of the basic light distribution pattern.
- part of the light reflected by the first reflecting surface 41 is lost light, compared to a configuration in which a shade is used to form light of a light distribution pattern having a cutoff line. Instead, it is used as the light R3 of the additional light distribution pattern PD2. Therefore, the light that could not be used can be effectively used, and the headlamp module 200 with high light utilization efficiency can be provided.
- the light R3 of the additional light distribution pattern PD2 is reflected by the fourth reflecting surface 44 and irradiated onto the irradiation surface 9 as light R5.
- the light R3 of the additional light distribution pattern PD2 is condensed in a direction away from the cut-off line forming portion 411 in the +Z-axis direction on the plane S21 compared to the light R1b of the basic light distribution pattern. Therefore, the light R5 is irradiated on the irradiation surface 9 at a position 92 slightly distant in the -Y-axis direction from the cutoff line 91 as compared with the light R4a.
- the curvature of the fourth reflecting surface 44 is different from the curvature of the third reflecting surface 43 .
- the curvature of the fourth reflecting surface 44 is smaller than the curvature of the third reflecting surface 43 .
- the light R3 of the additional light distribution pattern PD2 is projected. It is possible to prevent a position on the surface 9 that is far from the cutoff line 91 in the +Y-axis direction from being irradiated.
- the second reflecting surface 42 forms the light R3 of the additional light distribution pattern, and converts the light R3 of the additional light distribution pattern into the light R1b and R1c of the basic light distribution pattern. Add. As a result, the light reflected by the first reflecting surface 41 does not become lost light, and the additional light distribution pattern is formed as compared with the configuration in which a shade is used to form the light of the light distribution pattern having a cutoff line. It is used as light R3. Therefore, the headlamp module 200 with high light utilization efficiency can be provided.
- the curvature of the fourth reflecting surface 44 is different from the curvature of the third reflecting surface 43 .
- the light R3 of the additional light distribution pattern can be prevented from irradiating a position on the irradiation surface 9 far away from the cutoff line 91 in the -Y-axis direction.
- the headlight module 100 according to the first embodiment and the headlight module 200 according to the second embodiment described above are applied to the low beam of the headlight device for automobiles.
- the headlamp module of the present disclosure may be applied to applications other than low-beam headlamp devices for automobiles.
- the headlight modules 100 and 200 can be applied to other uses such as low beam and high beam of headlight devices for motorcycles or tricycles.
- a light distribution pattern is formed by arranging a plurality of headlight modules and adding the light distribution patterns of each module. That is, in some cases, a plurality of headlight modules are arranged side by side, and the light distribution pattern of each module is added to form a light distribution pattern.
- a specific example of such a form will be described in the third embodiment below.
- Embodiment 3 describes a headlamp device 300 using the headlamp module 100 according to Embodiment 1.
- FIG. 10 is a top view schematically showing a configuration example of a headlamp device 300 according to Embodiment 3.
- FIG. 10 is a top view schematically showing a configuration example of a headlamp device 300 according to Embodiment 3.
- the headlight device 300 has a housing 301 and a cover 302 .
- Cover 302 is made of a transparent material.
- the housing 301 is attached inside the body of the vehicle.
- the cover 302 is arranged on the surface portion of the vehicle body and exposed to the outside of the vehicle body.
- the cover 302 is arranged in the +Z-axis direction (that is, forward) of the housing 301 .
- Cover 302 is, for example, an outer lens.
- One or more headlight modules 100 are housed inside the housing 301 .
- three headlamp modules 100 are housed inside the housing 301 .
- the headlamp module 100 has high light utilization efficiency. Therefore, by housing one or more headlight modules 100 inside the housing 301, the headlight device 300 with high light utilization efficiency can be provided.
- the number of headlight modules 100 is not limited to three.
- the number of headlight modules 100 may be one, two, or four or more.
- the plurality of headlight modules 100 are arranged side by side in the X-axis direction inside the housing 301 .
- the method of arranging the plurality of headlight modules 100 is not limited to the method of arranging them in the X-axis direction.
- a plurality of headlight modules 100 may be arranged in other directions such as the Y-axis direction or the Z-axis direction in consideration of design or function.
- the light emitted from the plurality of headlight modules 100 passes through the cover 302 and is emitted forward of the vehicle.
- the illumination light emitted from the cover 302 overlaps with the light emitted from the adjacent headlamp modules 100 to form one light distribution pattern.
- the cover 302 is provided to protect the headlamp module 100 from wind, rain or dust. However, if the light guiding and projecting optical element 4 has a structure that protects the internal parts of the headlamp module 100 from the weather, dust, or the like, the cover 302 may not be provided. Further, in FIG. 10 , the headlamp module 100 is housed inside the housing 301 . However, the housing 301 need not be box-shaped. The housing 301 is configured by a frame or the like, and a configuration in which the headlight module 100 is fixed to the frame may be employed.
- the headlight device 300 including a plurality of headlight modules 100 is an aggregate of the headlight modules 100. Moreover, when one headlight module 100 is provided, the headlight device 300 is the same as the headlight module 100 . Moreover, the headlight device 300 according to the third embodiment may include the headlight module 200 according to the second embodiment.
- 1 light source 4 light guide projection optical element, 21a, 41 first reflecting surface, 22a, 42 second reflecting surface, 23a, 43 third reflecting surface, 24a, 44 fourth reflecting surface, 91 cutoff line, 100, 200 headlight module, 211, 411 cutoff line forming part, 300 headlight device, C1 optical axis, PD1 basic light distribution pattern, PD2 additional light distribution pattern, R1a light, R1b, R1c basic light distribution pattern light , R2 Second light, R3 Additional light distribution pattern light.
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Abstract
Description
図1は、実施の形態1に係る前照灯モジュール100の構成を示す模式図である。図1は、前照灯モジュール100を右方向(+X軸方向)から見た図である。
以上に説明した実施の形態1によれば、第2の反射面22aは、付加配光パターンPD2の光R3を形成し、当該付加配光パターンPD2の光R3を基本配光パターンPD1の光R1b、R1cに加える。これにより、カットオフラインを有する配光パターンの光を形成するためにシェードが用いられる構成と比べて、第1の反射面21aで反射した光の一部は、損失光とならずに、付加配光パターンPD2の光R3として利用される。よって、光利用効率の高い前照灯モジュール100を提供することができる。
以上に説明した実施の形態2によれば、第2の反射面42は、付加配光パターンの光R3を形成し、当該付加配光パターンの光R3を基本配光パターンの光R1b、R1cに加える。これにより、カットオフラインを有する配光パターンの光を形成するためにシェードが用いられる構成と比べて、第1の反射面41で反射した光は、損失光とならずに、付加配光パターンの光R3として利用される。よって、光利用効率の高い前照灯モジュール200を提供することができる。
実施の形態3では、実施の形態1に係る前照灯モジュール100を用いた前照灯装置300について説明する。図10は、実施の形態3に係る前照灯装置300の構成例を概略的に示す上面図である。
Claims (10)
- 第1の光を発する光源と、
前記第1の光のうちの一部の光を反射させることで、前記一部の光以外の光からカットオフラインを有する第1の配光パターンの光を形成する第1の反射面と、
前記光源の光軸に対して、前記光源から前記光軸に沿って離れるほど前記光軸から遠くなるように、傾く第2の反射面と
を有し、
前記第2の反射面は、第1の反射面で反射した前記一部の光からなる第2の光を反射させて第2の配光パターンの光を形成し、前記第2の配光パターンの光を前記第1の配光パターンの光に加える
前照灯モジュール。 - 前記第2の反射面は、前記第1の反射面に対向して配置されている
請求項1に記載の前照灯モジュール。 - 前記第1の反射面は、前記一部の光以外の光を反射させないことで前記カットオフラインを形成するカットオフライン形成部を有する
請求項1又は2に記載の前照灯モジュール。 - 前記一部の光は、前記第1の反射面上の前記カットオフライン形成部とは異なる位置で反射し、
前記第2の配光パターンは、前記カットオフラインを有しない
請求項3に記載の前照灯モジュール。 - 前記カットオフライン形成部の近傍に焦点位置を有し、前記第1の配光パターンの光を反射させる第3の反射面を更に有する
請求項3又は4に記載の前照灯モジュール。 - 前記第2の配光パターンの光を反射させる第4の反射面を更に有する
請求項5に記載の前照灯モジュール。 - 前記第3の反射面及び前記第4の反射面は、前記第1の反射面及び前記第2の反射面に凹面を向ける曲面で形成されている
請求項6に記載の前照灯モジュール。 - 前記第4の反射面の曲率は、前記第3の反射面の曲率と異なる
請求項7に記載の前照灯モジュール。 - 前記第4の反射面の曲率は、前記第3の反射面の曲率より小さい
請求項8に記載の前照灯モジュール。 - 請求項1から9のいずれか1項に記載の前照灯モジュールを1つ以上有する前照灯装置。
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DE112021007566.7T DE112021007566T5 (de) | 2021-04-22 | 2021-04-22 | Scheinwerfermodul und scheinwerfereinrichtung |
JP2022541241A JP7134387B1 (ja) | 2021-04-22 | 2021-04-22 | 前照灯モジュール及び前照灯装置 |
CN202180097128.2A CN117242295A (zh) | 2021-04-22 | 2021-04-22 | 前照灯模块以及前照灯装置 |
US18/286,368 US20240200745A1 (en) | 2021-04-22 | 2021-04-22 | Headlight module and headlight device |
PCT/JP2021/016311 WO2022224408A1 (ja) | 2021-04-22 | 2021-04-22 | 前照灯モジュール及び前照灯装置 |
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JP2006019052A (ja) * | 2004-06-30 | 2006-01-19 | Ichikoh Ind Ltd | 車両用灯具 |
JP2008226788A (ja) * | 2007-03-15 | 2008-09-25 | Koito Mfg Co Ltd | 車両用灯具ユニット |
JP2011222366A (ja) * | 2010-04-12 | 2011-11-04 | Ichikoh Ind Ltd | 車両用前照灯 |
JP2014146520A (ja) * | 2013-01-30 | 2014-08-14 | Stanley Electric Co Ltd | 車両用灯具 |
JP2015185312A (ja) * | 2014-03-24 | 2015-10-22 | スタンレー電気株式会社 | 車両用前照灯の光源装置及び車両用前照灯 |
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JP2015130293A (ja) | 2014-01-08 | 2015-07-16 | 株式会社小糸製作所 | 車両用灯具 |
JP6130602B2 (ja) * | 2014-07-08 | 2017-05-17 | 三菱電機株式会社 | 前照灯モジュール及び前照灯装置 |
JP6659304B2 (ja) * | 2015-10-27 | 2020-03-04 | スタンレー電気株式会社 | レンズ体、レンズ結合体及び車両用灯具 |
JP6867870B2 (ja) * | 2017-05-18 | 2021-05-12 | スタンレー電気株式会社 | 車両用灯具 |
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- 2021-04-22 JP JP2022541241A patent/JP7134387B1/ja active Active
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Patent Citations (5)
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JP2006019052A (ja) * | 2004-06-30 | 2006-01-19 | Ichikoh Ind Ltd | 車両用灯具 |
JP2008226788A (ja) * | 2007-03-15 | 2008-09-25 | Koito Mfg Co Ltd | 車両用灯具ユニット |
JP2011222366A (ja) * | 2010-04-12 | 2011-11-04 | Ichikoh Ind Ltd | 車両用前照灯 |
JP2014146520A (ja) * | 2013-01-30 | 2014-08-14 | Stanley Electric Co Ltd | 車両用灯具 |
JP2015185312A (ja) * | 2014-03-24 | 2015-10-22 | スタンレー電気株式会社 | 車両用前照灯の光源装置及び車両用前照灯 |
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US20240200745A1 (en) | 2024-06-20 |
JPWO2022224408A1 (ja) | 2022-10-27 |
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