WO2018084269A1 - 車両用灯具 - Google Patents

車両用灯具 Download PDF

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Publication number
WO2018084269A1
WO2018084269A1 PCT/JP2017/039831 JP2017039831W WO2018084269A1 WO 2018084269 A1 WO2018084269 A1 WO 2018084269A1 JP 2017039831 W JP2017039831 W JP 2017039831W WO 2018084269 A1 WO2018084269 A1 WO 2018084269A1
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WO
WIPO (PCT)
Prior art keywords
light
light emitting
lens
incident surface
emitting chip
Prior art date
Application number
PCT/JP2017/039831
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
大久保　泰宏
孝徳 浜本
Original Assignee
市光工業株式会社
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 市光工業株式会社 filed Critical 市光工業株式会社
Priority to EP17866521.2A priority Critical patent/EP3537030A4/de
Priority to CN201780067518.9A priority patent/CN110088525B/zh
Publication of WO2018084269A1 publication Critical patent/WO2018084269A1/ja

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/25—Projection lenses
    • F21S41/255—Lenses with a front view of circular or truncated circular outline
    • 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
    • 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
    • F21S41/12—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of emitted 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
    • 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
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/25—Projection lenses
    • F21S41/275—Lens surfaces, e.g. coatings or surface structures
    • 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
    • F21S41/40—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
    • F21S41/60—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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S45/00—Arrangements within vehicle lighting devices specially adapted for vehicle exteriors, for purposes other than emission or distribution of light
    • 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
    • F21V5/00—Refractors for light sources
    • F21V5/04—Refractors for light sources of lens shape

Definitions

  • the present invention relates to a vehicular lamp.
  • Patent Document 1 discloses a vehicular lamp including a lamp unit that can form both a low beam light distribution pattern and a high beam light distribution pattern, and the high beam light distribution pattern uses a plurality of light emitting chips.
  • a vehicular lamp that can perform variable high beam (Adaptive Driving Beam) control that changes a light distribution pattern according to the position of a preceding vehicle or an oncoming vehicle is disclosed.
  • the light emitting chip is also present at a position away from the lens focal point of the projection lens, and light emission located outside thereof due to off-axis aberrations.
  • the vehicle lamp disclosed in Patent Document 1 does not consider the problem of this off-axis aberration.
  • the present invention has been made in view of such circumstances, and is a vehicular lamp including a lamp unit that can form both a low beam light distribution pattern and a high beam light distribution pattern.
  • An object is to provide a suppressed vehicular lamp.
  • a vehicular lamp according to the present invention includes a first light emitting chip for low beam light distribution, a plurality of second light emitting chips arranged in a horizontal direction for high beam light distribution, the first light emitting chip and the second light emitting chip.
  • a lens that irradiates the light from the front side, a reflector that reflects the light from the first light emitting chip toward the lens, and a shade that blocks a part of the light reflected by the reflector, and the lens Comprises an upper incident surface vertically above the basic optical axis passing through the rear basic focal point of the lens, and a lower incident surface vertically lower than the basic optical axis, and the upper incident surface is the basic incident surface. It has a shape in which the radius of curvature increases from the optical axis side toward the outer edge of the upper incident surface, and the lower incident surface increases in radius of curvature from the horizontal center to the horizontal outer side.
  • the vertical section is straight It has a shape which is Jo.
  • the second light emitting chip is disposed vertically below the rear basic focus of the lens in the vertical direction, and the second light emitting chip passes through the light emission center.
  • the light emitting surface is disposed so as to be inclined upward in the vertical direction so that the light emitting optical axis intersects the upper incident surface.
  • the first reflecting unit that reflects a part of light emitted from the second light emitting chip toward the lower incident surface upward in the vertical direction;
  • a second reflecting portion that reflects a part of light emitted upward from the second light emitting chip in the vertical direction downward.
  • the first reflecting portion is incident on the lower incident surface directly from the second light emitting chip toward the lower incident surface. Light is reflected so that the amount of light is 1/3 to 6/7.
  • the light source includes a light diffusion structure that is formed on the lower incident surface and the upper incident surface and scatters light incident on the lens,
  • the light diffusion structure formed on the center side in the horizontal direction of the incident surface is set to have a larger amount of light scattering than the light diffusion structure formed on the lower incident surface.
  • the vehicular lamp according to the present invention includes a first light emitting chip for low beam distribution, a plurality of second light emitting chips arranged in a horizontal direction for high beam distribution, the first light emitting chip and the second light emitting chip.
  • a lens that irradiates the light from the front side, a reflector that reflects the light from the first light emitting chip toward the lens, and a shade that blocks a part of the light reflected by the reflector, and the lens Includes an upper incident surface vertically above the basic optical axis passing through the rear basic focal point of the lens, and a lower incident surface vertically lower than the basic optical axis, and passes through the rear basic focal point of the lens. In a vertical section along the basic optical axis, the upper end portion of the upper incident surface is located on the front side of the lower end portion of the lower incident surface.
  • the lamp unit which can form both a low beam light distribution pattern and a high beam light distribution pattern
  • FIG. 3 is a horizontal sectional view along a basic optical axis passing through a rear basic focal point of a lens. It is a figure explaining the design method of the entrance plane for suppressing the light distribution collapse by an off-axis aberration.
  • FIG. 3 is a diagram showing a light distribution pattern formed by light from a second light emitting chip disposed at a position farthest to the left (vehicle inside) from a vertical axis (Y axis) passing through the rear basic focal point of the lens in FIG. 2. is there.
  • the vehicular lamp according to the embodiment of the present invention is a vehicular headlamp (101R, 101L) provided on each of the left and right sides of the front of the vehicle 102 shown in FIG. 1, and is simply referred to as a vehicular lamp.
  • the vehicular lamp according to the present embodiment includes a housing (not shown) that opens to the front side of the vehicle and an outer lens (not shown) that is attached to the housing so as to cover the opening, and is formed by the housing and the outer lens.
  • a lamp unit 10 (see FIG. 2) and the like are disposed in the lamp chamber. In the following description of the lamp unit 10, the description will be given mainly using the vehicle lamp on the right side of the vehicle as an example, but the parts not specifically mentioned are common to the left and right vehicle lamps.
  • FIG. 2 is a plan view of the lamp unit 10 as viewed from the front side
  • FIG. 3 is a cross-sectional view of the lamp unit 10.
  • the lens 50 is omitted and the inside is shown.
  • FIG. 3 is a vertical sectional view along the basic optical axis (see Z axis) passing through the rear basic focal point O of the lens 50.
  • the lamp unit 10 includes a heat sink 20, a first light source 25, a reflector 30, a shade 31, a mounting member 40, a second light source 43, a power supply connector 44, a lens 50,
  • the first reflection part 61 and the second reflection part 62 are mainly provided.
  • the heat sink 20 includes a base portion 21 and a plurality of radiating fins 22 integrally formed on the lower side of the base portion 21 and extending downward in the vertical direction.
  • a mounting portion 26 for mounting the first light source 25 is formed on the upper surface of the base portion 21 in the vertical direction, and the first light source 25 is attached by a holder 27.
  • the heat sink 20 is preferably formed of a metal or a resin having a high thermal conductivity in order to efficiently dissipate the heat generated by the first light source 25.
  • the heat sink 20 made of aluminum die casting is used. Yes.
  • the first light source 25 is a light source that emits light for forming a low beam light distribution pattern.
  • the first light source 25 is arranged so as to emit light upward in the vertical direction.
  • a first light emitting chip 24 provided on the substrate 23.
  • the LED chip which is a semiconductor light emitting element is used for the first light emitting chip 24.
  • the first light emitting chip 24 is not limited to the LED chip.
  • the semiconductor light emitting element is a semiconductor light emitting element.
  • a certain LD chip laser diode chip may be used.
  • the reflector 30 is a member that reflects light radiated upward in the vertical direction from the first light emitting chip 24 toward the lens 50, and the reflecting surface 30 a of the reflector 30 is opened to the front side so that the first light emitting chip 24 opens. It is attached to the base portion 21 of the heat sink 20 so as to cover the top in a semi-dome shape.
  • the shade 31 is disposed between the first light source 25 and the lens 50, blocks a part of the light reflected by the reflector 30 toward the lens 50, and cuts off a low beam light distribution pattern. It is a member which forms.
  • the edge 31 a on the front side of the shade 31 has a shape matched to the cut-off line
  • the rear basic focal point O of the lens 50 is the edge on the front side of the shade 31.
  • the shade 31 is disposed so as to be positioned in the vicinity of the portion forming the upper end portion of the oblique cut-off line 31a.
  • the shade 31 is arranged so that the rear basic focal point O of the lens 50 is positioned about 1.0 mm behind the front edge 31 a of the shade 31.
  • the attachment member 40 is a member to which the shade 31, the second light source 43, the power supply connector 44, the first reflection portion 61, and the second reflection portion 62, which will be described later, are attached.
  • the attachment member 40 is formed as a separate member from the heat sink 20, and the attachment member 40 is fixed to the heat sink 20.
  • the attachment member 40 is not necessarily configured as a separate member from the heat sink 20.
  • a structure corresponding to the mounting member 40 may be formed integrally.
  • the first surface 40 a located on the front side is a surface on which the second light source 43 is arranged.
  • the reason will be described later, but the rear basic focal point O of the lens 50 is set.
  • the first surface 40a is formed so as to face obliquely upward in the vertical direction at an angle ⁇ 1 with respect to the passing vertical axis (see the Y axis).
  • the first surface 40a is a surface inclined obliquely upward in the vertical direction so that the angle ⁇ 1 is about 25 °.
  • the second light source 43 is a light source that emits light for forming a high-beam light distribution pattern. As shown in FIG. 3, the second light source 43 includes a second substrate 41 disposed on the first surface 40 a of the mounting member 40, And a plurality of second light emitting chips 42 (see FIG. 2) provided on the two substrates 41 so as to be arranged in the horizontal direction.
  • the second light emitting chip 42 also uses an LED chip that is a semiconductor light emitting element, as with the first light emitting chip 24.
  • the second light emitting chip 42 is not limited to the LED chip. It may be an LD chip (laser diode chip) which is a light emitting element.
  • the four on the vehicle outer side (the left side in the figure) on the basis of the vertical axis (see the Y axis) passing through the rear basic focal point O of the lens 50 when viewed from the front side of the vehicle.
  • the second light emitting chip 42 is provided, seven second light emitting chips 42 are provided on the vehicle inner side (right side in the figure), and eleven second light emitting chips 42 are provided so as to be arranged in the horizontal direction.
  • the number of the second light emitting chips 42 may be increased or decreased according to the horizontal light distribution range required for the high beam light distribution pattern to be formed.
  • the horizontal left and right directions are based on the vertical axis (see the Y axis) passing through the rear basic focal point O of the lens 50. What is necessary is just to arrange
  • the arrangement state of the second light emitting chip 42 will be described with reference to the vehicle inner side and the vehicle outer side as described above.
  • Four second light emitting chips 42 are provided on the vehicle outer side (left side in the figure) on the basis of a vertical axis passing through the focal point O (see the Y axis), and seven second light emitting chips 42 are provided on the vehicle inner side (right side in the figure). It will be provided.
  • the arrangement pitch in the horizontal direction is different from the remaining nine second light emitting chips 42.
  • the pitch between the second light emitting chips 42 in the horizontal direction is set so that the light distribution pattern formed by the light from the adjacent second light emitting chips 42 is appropriately adjusted on the screen. What is necessary is just to set so that it may overlap.
  • the 2nd light source 43 has shown about the case where the some 2nd light emitting chip 42 is provided on the 2nd board
  • variable high beam (Adaptive Driving Beam) control for changing the high beam light distribution pattern can be performed.
  • the power supply connector 44 is a connector to which an external connector for supplying power is connected. As shown in FIG. 3, the power supply connector 44 is provided on the second substrate 41 and is connected to the second light emitting chip 42 formed on the second substrate 41. The conductive pattern is electrically connected.
  • the lens 50 is formed of glass, resin, or the like, and is a member that irradiates light from the first light emitting chip 24 and the second light emitting chip 42 while controlling light distribution so as to form a predetermined light distribution pattern on the front side. It is attached to the heat sink 20 via the lens holder 50a. A specific configuration for light distribution control in the lens 50 will be described later.
  • the material for forming the lens 50 is not particularly limited, but the lens 50 is preferably formed of a resin from the viewpoint of good moldability.
  • a resin from the viewpoint of easily suppressing the occurrence of blue spectral colors, an acrylic resin having a small refractive index wavelength dependency is preferable.
  • the number of second light emitting chips 42 is increased, and thus the lens 50 may be required to have heat resistance.
  • a polycarbonate resin having excellent heat resistance may be used.
  • the first reflecting portion 61 is a member that reflects a part of light emitted from each second light emitting chip 42 toward the lower side in the vertical direction, and is attached to the attachment member 40.
  • the angle ⁇ 2 radiates downward in the vertical direction at an angle larger than about 17 ° with respect to the basic optical axis (see the Z axis) passing through the rear basic focal point O of the lens 50. The light to be reflected is reflected.
  • the second reflection unit 62 is a member that reflects a part of light emitted from each second light emitting chip 42 toward the upper side in the vertical direction.
  • the second reflecting portion 62 is provided below the shade 31 in the vertical direction, and is attached to the attachment member 40 together with the shade 31.
  • the second reflecting portion 62 is disposed so that the reflecting surface of the second reflecting portion 62 is substantially parallel to the light emission optical axis OZ passing through the light emission center of the second light emitting chip 42.
  • FIG. 4 is a diagram for explaining the shape of the incident surface 51 of the lens 50.
  • FIG. 4A is a vertical cross section along the basic optical axis (see the Z axis) passing through the rear basic focal point O of the lens 50.
  • FIG. 4B is a horizontal sectional view along the basic optical axis (see Z axis) passing through the rear basic focal point O of the lens 50.
  • FIG. 5 is a diagram for explaining a method of designing an incident surface for suppressing the collapse of light distribution due to off-axis aberrations.
  • the lens L shown in FIG. 5 is a horizontal sectional view of a lens having a basic shape for forming the lens 50.
  • FIG. 5 shows an example of a state in which light rays parallel to the optical axis P of the lens L are incident on the lens L from one surface S1 and are emitted from the other surface S2, and are incident on the one surface S1.
  • An extension line of the previous light beam and an extension line of the light beam after exiting from the other surface S2 are indicated by a one-dot chain line, and a point where the extension lines intersect (refer to a point where the one-dot chain line intersects) is a point D.
  • the locus of the point D is as indicated by a dotted line
  • the locus indicated by the dotted line is the main surface SML of the lens L.
  • a point where the optical axis P of the lens L intersects with the principal surface SML is a principal point SP of the lens L.
  • the main surface SML is a perfect circle (Apollon circle) centered on the basic focus BF
  • the basic focus of the lens L can be suppressed in order to suppress the off-axis aberration of the lens L.
  • the other surface S2 may be formed so that the distance K between BF and the point D is constant at the focal length F.
  • K W / sin ⁇ ′ can be expressed
  • the basic optical axis (see Z axis) passing through the rear basic focal point O (see FIG. 3) of the lens 50 intersects with the incident surface 51.
  • a shape in which the radius of curvature continuously increases in the radial direction that is, in the direction of the outer peripheral edge of the lens 50) with reference to M (see FIG. 4).
  • the lens 50 of the present embodiment is obtained based on the sine condition violation amount OSC in consideration of performing the light distribution control for the low beam light distribution pattern and the light distribution control for the high beam light distribution pattern.
  • the shape is a basic shape with some modifications.
  • the lens 50 has a basic optical axis (see Z axis) passing through the rear basic focal point O (see FIG. 3) of the lens 50 as an incident surface 51 on which light is incident.
  • the curvature radius increases from the basic optical axis (see Z axis) side toward the outer edge of the upper incident surface 52.
  • the upper incident surface 52 having a curved shape projecting toward the rear side is a point M (where the basic optical axis (see Z axis) and the incident surface 51 intersect. 4), the radius of curvature Rvc is about 150 mm, the radius of curvature continuously increases toward the upper side in the vertical direction, and the radius of curvature Rvt becomes about 300 mm on the outer edge side of the upper incident surface 52. It has become.
  • the lower incident surface 53 when viewed from the cross section (vertical cross section) shown in FIG. 4A, with respect to the lower incident surface 53, the lower end of the lower incident surface 53 from the point M in order to suppress the influence on the low beam light distribution pattern.
  • the diameter of the lens 50 is about 68 mm, when viewed in a vertical section along the basic optical axis (see Z axis) passing through the rear basic focal point O (see FIG. 3) of the lens 50.
  • the vertical width of the lower incident surface 53 is about 34 mm. Even if the lower incident surface 53 is a curved surface protruding rearward, the vertical cross section along the basic optical axis (see Z-axis).
  • the lower incident surface 53 When the radius of curvature of the lower incident surface 53 is sufficiently larger than the width of the lower incident surface 53 (for example, when the radius of curvature is 20 times or more the vertical width of the lower incident surface 53), That is, if the lower incident surface 53 is a sufficiently gentle curved surface having a constant radius of curvature of about 1000 mm, the lower incident surface 53 can be said to be sufficiently linear.
  • the upper incident surface 52 and the lower incident surface 53 have the shapes as described above, they pass through the rear basic focal point O (see FIG. 3) of the lens as shown in FIG.
  • the upper end UE of the upper incident surface 52 is located on the front side of the lower end Rvb of the lower incident surface 53.
  • the upper incident surface 52 has a radius of curvature at the point M (see FIG. 4) where the basic optical axis (see Z axis) and the incident surface 51 intersect.
  • Rhc is about 250 mm
  • the radius of curvature continuously increases toward the outer side in the horizontal direction
  • the radius of curvature Rhl and Rhr are both about 450 mm on the outer edge side of the upper incident surface 52.
  • the curvature radius is continuously large toward the outer periphery part side similarly in the horizontal cross section.
  • the upper incident surface 52 has a shape in which the radius of curvature increases from the basic optical axis (see Z axis) side toward the outer edge of the upper incident surface 52 (a shape in which the radius of curvature increases radially).
  • the lower incident surface 53 has a radius of curvature that increases from the horizontal center (Z-axis) side toward the outer side in the horizontal direction in consideration of the influence on the low beam light distribution pattern and the suppression of the light distribution collapse.
  • the vertical cross section has a linear shape.
  • the incident surface 51 By forming the incident surface 51 on a convex free-form surface on the rear side provided with the upper incident surface 52 and the lower incident surface 53 having such a shape, it is possible to suppress the light distribution collapse due to the off-axis aberration. .
  • FIG. 3 it is on the rear side (about 2.1 mm rear side in this example) from the rear basic focus O of the lens 50 and vertically below the rear basic focus O of the lens 50 (in this example).
  • the second light emitting chips 42 are arranged on a horizontal line passing through a point at a position of about 1.8 mm lower side), and the light emitted from each second light emitting chip 42 is not obstructed by anything,
  • the two light emitting chips 42 are not inclined obliquely upward in the vertical direction as in the present embodiment, when light is irradiated toward the lens 50, a light distribution pattern formed by light emitted from each second light emitting chip 42 is obtained. It may be separated in the vertical direction.
  • FIG. 6 shows a first reflection of light from the second light emitting chip 42 disposed close to the left side (vehicle inside) of the vertical axis (see the Y axis) passing through the rear basic focal point O of the lens 50 in FIG.
  • the second light emitting chip 42 is arranged without being reflected by the part 61 or the second reflecting part 62 and tilted upward in the vertical direction, and simulates the case where light is irradiated toward the incident surface 51.
  • the VU-VL line indicates a vertical reference line on the screen
  • the HL-HR line indicates a horizontal reference line on the screen.
  • FIG. 6 shows the light distribution pattern on the screen by isoluminous lines.
  • the vertical reference line on the screen is indicated by the VU-VL line
  • the horizontal reference line on the screen is indicated by the HL-HR line. It is assumed that the pattern is indicated by an isoluminous line.
  • a light distribution pattern formed by light incident on the lens 50 from the upper incident surface 52 and irradiated on the front side appears on the lower side in the vertical direction on the screen, and enters the lens 50 from the lower incident surface 53.
  • the light distribution pattern formed by the light irradiated to the front side may appear on the upper side in the vertical direction on the screen, and a light distribution pattern separated in the vertical direction may be formed.
  • the light emitting direction of the second light emitting chip 42 is adjusted, and the amount of light is adjusted by the first reflecting unit 61, so that the light of the lens 50 is directed to the front side.
  • the shape of the exit surface 54 that irradiates the light it is possible to form a better light distribution pattern with a rectangular shape as a whole, which will be described in detail below.
  • FIG. 7 is a view for explaining the shape of the exit surface 54 of the lens 50
  • FIG. 7A is a view of the lens 50 viewed from the rear side (view of the entrance surface 51 in front).
  • 7B is a vertical sectional view along the basic optical axis (see Z axis) passing through the rear basic focal point O of the lens 50.
  • the lens 50 has, as an exit surface 54, an upper exit surface 55 that is vertically above the basic optical axis (see Z axis) passing through the rear basic focal point O (see FIG. 3) of the lens 50. And a lower emission surface 56 on the lower side in the vertical direction from the basic optical axis (see Z axis). Further, as shown in FIG. 7A, the lower emission surface 56, as viewed from the incident surface 51 side, the first lower emission surface 56a on the horizontal center side, and the horizontal left outer side (vehicle inner side). And an emission surface 56c on the right outside in the horizontal direction (vehicle outside).
  • the emission surface 56b and the emission surface 56c are collectively referred to, they may be referred to as second lower emission surfaces 56b and 56c. That is, the lower emission surface 56 includes a first lower emission surface 56a on the center side in the horizontal direction, and two second lower emission surfaces 56b and 56c located on the outer side in the horizontal direction of the first lower emission surface 56a. have.
  • the first lower emission surface 56a is an area where light from the first light emitting chip 24 (see FIG. 3) that emits light for forming a low beam light distribution pattern is mainly irradiated toward the front side,
  • the second lower emission surfaces 56b, 56c horizontally outward from the first lower emission surface 56a are regions where light from the first light emitting chip 24 (see FIG. 3) is not irradiated to the front side, that is, This is a region that does not greatly contribute to the formation of the low beam light distribution pattern.
  • the horizontal and horizontal spread angles of light emitted from the point light source (the rear of the lens 50)
  • a region in which light having an angle of 28 degrees or less that passes through the basic focal point O (incident with respect to the Z axis) is incident from the incident surface 51 and irradiated forward is defined as a first lower emission surface 56a.
  • the regions on the outer side in the horizontal direction are the second lower emission surfaces 56b and 56c.
  • the shape of the second lower emission surfaces 56b and 56c having a low contribution to the low beam distribution pattern is adjusted so as not to affect the low beam distribution pattern. It is possible to suppress the separation and bring it closer to a rectangular light distribution pattern. As will be described later, the same operation is performed on the upper emission surface 55.
  • the light from the point light source is formed in a shape that irradiates the lower side in the vertical direction on the screen.
  • the position of the outer peripheral edge on the outer side in the horizontal direction from the position Q1 is defined as a position Q2
  • the position of the outer peripheral edge on the lower side in the vertical direction from the position Q1 is defined as a position Q3
  • a position Q4 is a position that is the vertex of a right triangle other than the position Q2 and the position Q3 when the right triangle formed by connecting the position Q1, the position Q2, and the position Q3 is axisymmetric with respect to.
  • the light is emitted downward in the vertical direction on the screen as it approaches position Q2 from position Q1.
  • the second lower shape is formed so that light is emitted toward the lower side of the horizontal reference line on the screen by 1.5 degrees (in FIG. 7, the lower side is indicated by minus).
  • the side emission surfaces 56b and 56c are formed.
  • the light is emitted downward in the vertical direction on the screen as it approaches the position Q3 from the position Q1, and at the position Q3, 1.5 degrees below the horizontal reference line on the screen.
  • the second lower emission surfaces 56b and 56c are formed in a shape for irradiating light toward the lower side (in FIG. 7, the lower side is indicated by minus).
  • the position Q1 approaches the position Q4, light is irradiated downward in the vertical direction on the screen.
  • the screen at the position Q4
  • the second lower emission surfaces 56b and 56c are formed in a shape that irradiates light toward the lower 1.5 degrees from the horizontal reference line on the upper side (in FIG. 7, the lower side is indicated by minus). Yes.
  • the outer peripheral edge that is the end of the actual lens 50 does not reach the lower 1.5 degrees.
  • the second lower emission surfaces 56b and 56c are positioned at the position Q1 on the first lower emission surface 56a side in the vertical direction (that is, the basic optical axis Z side (point M).
  • the light from the point light source is perpendicular to the screen. It is formed in a shape that irradiates downward in the direction.
  • the light emitted from the lower emission surface 56 to the front side forms a light distribution pattern that appears on the upper side in the vertical direction on the screen.
  • the shapes of the second lower emission surfaces 56b and 56c Is adjusted so that the upper side of the upper light distribution pattern shown in FIG. 6 is positioned on the lower side, and the light is distributed so as to spread slightly in the horizontal direction.
  • the light distribution is extended to the side of the lower light distribution pattern appearing on the screen, and the light distribution is controlled in the direction in which the two separated light distribution patterns are integrated.
  • the light emitted from the upper emission surface 55 to the front side forms a light distribution pattern that appears on the lower side in the vertical direction on the screen.
  • the shape of the upper emission surface 55 shown in FIG. While extending the lower light distribution pattern upward, it is integrated with the light distribution pattern appearing on the upper side in the vertical direction on the screen formed by the light from the lower emission surface 56 by being close to a rectangular shape, The light distribution pattern when the two light distribution patterns are multiplexed can be made closer to a rectangular shape.
  • the upper emission surface 55 will be described.
  • the upper emission surface 55 irradiates light from the point light source forward from the lens 50 when assuming a point light source at the rear basic focal point O toward the upper side in the vertical direction.
  • the light is distributed downward on the center side of the lens 50 and is distributed on the upper side of the lens 50.
  • a light beam L1 (overlapping the Z axis) shown in FIG.
  • Light from the point light source is irradiated in a substantially horizontal direction, but it is formed in a shape that continuously irradiates light from the point light source downward in the vertical direction toward the upper side in the vertical direction.
  • the light beam L2 the light is irradiated at 1.2 degrees below the horizontal reference line on the screen in the vertical direction (in FIG. 7, the lower side is indicated by minus).
  • the upper emission surface 55 is further formed in a shape that continuously irradiates light from a point light source toward the upper side in the vertical direction, and at the position on the uppermost vertical direction of the upper emission surface 55, As indicated by the light beam L3, light is emitted toward 0.7 degrees above the horizontal reference line on the screen in the vertical direction.
  • the shape of the upper emission surface 55 is assumed to be a point light source at the rear basic focal point O toward the upper side in the vertical direction, light from the point light source is irradiated downward in the vertical direction. Assuming a shape that irradiates the upper side in the vertical direction, the lower vertical light distribution pattern shown in FIG. The light distribution range can be expanded to the upper side in the vertical direction while approaching the rectangular shape.
  • the lens 50 when the light emitted from the upper emission surface 55 is continuously distributed downward in the vertical direction toward the upper side in the vertical direction and then distributed in the upper direction in the vertical direction to form a light distribution pattern, the lens 50 The spectral color appearing at the lower end of the light distribution pattern formed by the light emitted from the upper emission surface 55 can also be suppressed.
  • the emission surface 54 is formed on a convex free-form surface on the front side including the lower emission surface 56 and the upper emission surface 55 having the above-described shape, and the upper emission surface 55 as shown in FIG.
  • the light emitting surface is inclined upward in the vertical direction so that the light emitting optical axis OZ passing through the light emission center of the second light emitting chip 42 intersects the vertical intermediate portion of the upper incident surface 52 so as to increase the amount of light emitted from
  • a light distribution pattern as shown in FIG. 8 is formed.
  • FIG. 8 is a diagram showing a light distribution pattern on the screen formed in a state before providing the first reflecting portion 61 and the second reflecting portion 62 in this embodiment
  • FIG. FIG. 8B is a diagram showing a light distribution pattern formed by the light emitted from the lower emission surface 56
  • FIG. FIG. 8C is a diagram illustrating a light distribution pattern formed by light from the second light emitting chip 42 on which the light distribution patterns of FIG. 8A and FIG. 8B are multiplexed.
  • the light distribution pattern formed by the light emitted from the upper emission surface 55 is also the light distribution formed by the light emitted from the lower emission surface 56.
  • the pattern is also substantially in the shape of a rectangle as a whole, and can be sufficiently overlapped in the vertical direction when these light distribution patterns are multiplexed. .
  • the light distribution pattern formed by multiplexing the light distribution patterns shown in FIGS. 8A and 8B is cracked as shown in FIG. As a whole, it is quite close to a rectangular shape.
  • the separation of the high luminous intensity band is further suppressed by mainly providing the first reflecting portion 61.
  • the first reflecting portion 61 reflects a part of the light directed to the lower incident surface 53 out of the light emitted from each second light emitting chip 42 to the lens 50 to the upper incident surface.
  • the amount of light incident on 52 is greater than the amount of light incident on the lower incident surface 53.
  • the first reflecting portion 61 has a light quantity incident on the lower incident surface 53 that is less than half of the light emitted directly from the second light emitting chip 42 toward the lower incident surface 53.
  • the light is reflected toward the upper incident surface 52 so as to be almost halved in this example.
  • it is not always necessary to make it half or less.
  • the amount of light is about 1/3 to 6/7.
  • the light distribution pattern formed by the light incident on the lens 50 from the lower incident surface 53 and irradiated from the lower output surface 56, that is, the light amount of the light distribution pattern appearing on the upper side of the screen is halved. can do.
  • the light reflected by the first reflecting portion 61 is irradiated from the upper emission surface 55 about 5 degrees above the horizontal reference line on the screen, as shown in FIG.
  • Light distribution is performed on the outer periphery on the upper side in the vertical direction of the light distribution pattern shown in FIG.
  • FIG. 9 is a view for explaining the light diffusion structure formed on the incident surface 51.
  • the figure which shows the shape of a light-diffusion structure is also shown in figure as an enlarged view.
  • the light diffusion structure divides the incident surface 51 into four regions (first region 57a, second region 57b, third region 57c, and fourth region 57d) to adjust the amount of light diffusion. Yes.
  • the light diffusion structure formed in each region has a structure in which a plurality of irregularities are formed as shown in the enlarged view.
  • the amount of unevenness (height of unevenness) corresponding to each region is set.
  • the light diffusing structure is shown with rounded irregularities, but the light diffusing structure may have a ridge line of a rectangle or a rhombus, and a concave or convex square pyramid. It may be a structure.
  • the light diffusion amount may be adjusted by adjusting the density of the convex portions, the concave portions, and the convex portions.
  • the unevenness amount is set to 5 ⁇ m in consideration of the influence on the low beam light distribution pattern, and the light distribution shown in FIG. The pattern is obscured and the high luminous intensity band seen in FIG. 8B becomes inconspicuous.
  • a region corresponding to the upper incident surface 52 a second region 57b which is the central side in the horizontal direction, a third region 57c on the right side in the horizontal direction of the second region 57b (the vehicle outside), and a horizontal region of the second region 57b.
  • the fourth region 57d on the left side of the direction (inner side of the vehicle) is set, and the amount of light diffusion is larger than that of the light diffusion structure formed on the lower incident surface 53 with the unevenness of the second region 57b being 6 ⁇ m. Is set larger.
  • the amount of light diffusion in the second region 57b is increased to add a harshness, and the inner side of the light distribution pattern in FIG. 8A is widened outward to make the light distribution shape closer to a rectangular shape. At the same time, the amount of light is made uniform.
  • the third region 57c and the fourth region 57d located on the outer side in the horizontal direction of the second region 57b have an unevenness amount of 4 ⁇ m and a small amount of wrinkle, and the rectangular shape of the light distribution pattern is maintained.
  • the uniformity of light distribution can be improved by combining with the tanning in the two regions 57b.
  • FIG. 10 is a diagram showing a light distribution pattern on the screen of the vehicular lamp according to the present embodiment
  • FIG. 10 (a) is a light distribution pattern formed by light emitted from the upper emission surface 55.
  • 10 (b) is a light distribution pattern formed by light emitted from the lower emission surface 56
  • FIG. 10 (c) is a diagram in which the light distribution patterns of FIG. 10 (a) and FIG. 10 (b) are multiplexed. It is a figure which shows the light distribution pattern which the light from the 2nd light emitting chip
  • the light distribution pattern of FIG. 10 (a) is closer to a rectangular shape than FIG. 8 (a).
  • the light distribution pattern in FIG. 10B is closer to a rectangular shape than in FIG.
  • the light distribution pattern obtained by multiplexing these light distribution patterns has a single high-luminance band and has a good rectangular shape as a whole. .
  • FIG. 11 is arranged at a position farthest to the left (the vehicle inner side) from the vertical axis (see the Y axis) passing through the rear basic focal point O of the lens 50 in a front view as viewed from the vehicle front side in FIG.
  • tip 42 is shown.
  • the incident surface 51 is formed in the shape as described above, and the off-axis aberration is suppressed, so that the light distribution pattern has a clean rectangular shape.
  • the light distribution collapse due to off-axis aberrations is greatly suppressed.
  • the present invention has been described based on the specific embodiments, the present invention is not limited to the above embodiments.
  • the upper incident surface 52 has a radius of curvature Rvc of about 150 mm on the point M (see FIG. 4) side and is directed upward in the vertical direction. Since the radius of curvature continuously increases and the radius of curvature Rvt on the outer edge side is about 300 mm, the upper entrance surface 52 has an average radius of curvature averaged from the point M to the outer edge, It was a relatively small gradually changing curved surface.
  • the lower incident surface 53 is linear from the point M to the lower end Rvb in order to suppress the influence on the low beam light distribution pattern, and the curvature from the point M to the lower end Rvb.
  • the average curvature radius obtained by averaging the radii is larger than the average curvature radius of the upper incident surface 52.
  • the lower incident surface 53 only needs to have an average radius of curvature that is larger than the average curvature radius of the upper incident surface 52 and can suppress the influence on the low beam light distribution pattern.
  • the curvature radius may be gradually changed from the bottom toward the lower end Rvb.
  • the lower incident surface 53 has a radius of curvature Rvc of about 150 mm on the point M (see FIG. 4) side of the lower incident surface 53, and the radius of curvature continuously increases downward in the vertical direction. It may be a curved surface in which the curvature radius is gradually changed so that the curvature radius is about 1000 mm at the lower end Rvb.
  • the lower incident surface 53 has an average radius of curvature larger than that of the upper incident surface 52 as in the above-described embodiment, the basic passing through the rear basic focal point O (see FIG. 3) of the lens.
  • the upper end UE (see FIG. 4) of the upper incident surface 52 is positioned in front of the lower end Rvb (see FIG. 4) of the lower incident surface 53.
  • the lower incident surface 53 a gradually curved surface, the influence of off-axis aberrations is further suppressed, and the arrangement is much closer to a rectangular shape than the light distribution pattern shown in FIG. It can be a light pattern.
  • the lens is An upper emission surface on the upper side in the vertical direction from the basic optical axis; A lower emission surface vertically below the basic optical axis, and The upper emission surface is formed in such a shape that light radiated forward from the lens is distributed such that the central side in the vertical direction of the lens distributes to the lower side in the vertical direction, and the upper side in the vertical direction of the lens distributes to the upper side in the vertical direction.
  • the lower emission surface is A first lower emission surface on the horizontal center side; Two second lower emission surfaces located on the outside in the horizontal direction of the first lower emission surface, The second lower emission surface is closer to the outer peripheral edge of the second lower emission surface from the position on the basic optical axis side toward the outer peripheral edge of the second lower emission surface.
  • the second light emitting chip is disposed on the lower side in the vertical direction on the rear side than the rear basic focus of the lens, The light emitting surface of the second light emitting chip is disposed so as to be inclined upward in the vertical direction so that a light emitting optical axis passing through a light emitting center intersects the upper incident surface.
  • Item 1. A vehicle lamp according to item 1.
  • ⁇ Claim 5> The first reflecting unit has a light quantity incident on the lower incident surface of the light emitted directly from the second light emitting chip toward the lower incident surface from 1/3 to 2/3.
  • the vehicular lamp according to claim 4 wherein the vehicular lamp reflects light.
  • ⁇ Claim 6> A light diffusing structure that is formed on the lower incident surface and the upper incident surface and diffuses light incident on the lens; 2.
  • the light diffusion structure formed on the center side in the horizontal direction of the upper incident surface has a light diffusion amount set larger than that of the light diffusion structure formed on the lower incident surface.

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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)
PCT/JP2017/039831 2016-11-02 2017-11-02 車両用灯具 WO2018084269A1 (ja)

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EP17866521.2A EP3537030A4 (de) 2016-11-02 2017-11-02 Fahrzeuglampe
CN201780067518.9A CN110088525B (zh) 2016-11-02 2017-11-02 车辆用灯具

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JP2020102429A (ja) * 2018-12-25 2020-07-02 市光工業株式会社 車両用前照灯のレンズ及び車両用前照灯
CN109630971A (zh) * 2019-01-15 2019-04-16 江西省绿野汽车照明有限公司 汽车远光照明系统以及汽车
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JP2018078089A (ja) 2018-05-17
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EP3537030A1 (de) 2019-09-11
CN110088525A (zh) 2019-08-02
JP7000695B2 (ja) 2022-02-04

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