WO2021025136A1 - Vehicle lamp - Google Patents

Vehicle lamp Download PDF

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Publication number
WO2021025136A1
WO2021025136A1 PCT/JP2020/030271 JP2020030271W WO2021025136A1 WO 2021025136 A1 WO2021025136 A1 WO 2021025136A1 JP 2020030271 W JP2020030271 W JP 2020030271W WO 2021025136 A1 WO2021025136 A1 WO 2021025136A1
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WO
WIPO (PCT)
Prior art keywords
light
emitting element
light emitting
distribution pattern
array
Prior art date
Application number
PCT/JP2020/030271
Other languages
French (fr)
Japanese (ja)
Inventor
小泉　浩哉
生田　龍治郎
Original Assignee
株式会社小糸製作所
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 株式会社小糸製作所 filed Critical 株式会社小糸製作所
Priority to CN202080034550.9A priority Critical patent/CN113795705A/en
Priority to JP2021537394A priority patent/JP7449939B2/en
Publication of WO2021025136A1 publication Critical patent/WO2021025136A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/24—Light guides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q1/00—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor
    • B60Q1/02—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments
    • B60Q1/04—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments the devices being headlights
    • 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]
    • F21S41/151—Light emitting diodes [LED] arranged in one or more lines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—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
    • F21S41/153—Light emitting diodes [LED] arranged in one or more lines arranged in a matrix
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/19—Attachment of light sources or lamp holders
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/20—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
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/10—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the light source
    • F21S43/19—Attachment of light sources or lamp holders
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
    • F21S43/235—Light guides
    • F21S43/236—Light guides characterised by the shape of the light guide
    • F21S43/239—Light guides characterised by the shape of the light guide plate-shaped
    • 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
    • F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
    • F21S43/235—Light guides
    • F21S43/236—Light guides characterised by the shape of the light guide
    • F21S43/241—Light guides characterised by the shape of the light guide of complex shape
    • 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
    • F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
    • F21S43/235—Light guides
    • F21S43/242—Light guides characterised by the emission area
    • F21S43/245—Light guides characterised by the emission area emitting light from one or more of its major surfaces
    • 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
    • F21S43/30—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by reflectors
    • F21S43/31—Optical layout 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
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/40—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the combination of reflectors and refractors
    • 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
    • F21S45/10—Protection of lighting devices
    • 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
    • F21S45/40—Cooling of lighting devices
    • F21S45/42—Forced cooling
    • 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
    • F21S45/40—Cooling of lighting devices
    • F21S45/47—Passive cooling, e.g. using fins, thermal conductive elements or openings
    • 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
    • F21V19/00—Fastening of light sources or lamp holders
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • 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
    • 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
    • F21W2107/00—Use or application of lighting devices on or in particular types of vehicles
    • F21W2107/10—Use or application of lighting devices on or in particular types of vehicles for land vehicles

Definitions

  • the present invention relates to a vehicle lamp.
  • the present invention has been made in view of such a situation, and an object of the present invention is to provide a desired arrangement even when some of the light emitting elements cannot be arranged near the focal point of the projection lens in a vehicle lamp using a plurality of light emitting elements.
  • the purpose is to provide a technique capable of forming an optical pattern.
  • a vehicle lamp includes a projection lens, a first light emitting element arranged at or near the focal point of the projection lens, a second light emitting element, and a second light emitting element. It is provided with an incident portion for incident light from the light, a light guide portion for guiding the incident light, and a light guide body having an exit portion for emitting the guided light. The exit portion of the light guide is arranged at or near the focal point of the projection lens.
  • the first light emitting element and the second light emitting element may be arranged on the same substrate.
  • the light guide body may have a second emitting portion for emitting the incident light.
  • the vehicle lighting fixture may further include a reflector that reflects the light emitted from the second exit portion toward the projection lens.
  • the first light emitting element may include a light emitting element for a low beam and a light emitting element for a high beam.
  • the second light emitting element may include a light emitting element for daytime running.
  • This vehicle lamp has a substrate, an array of first light emitting elements for the first light distribution pattern, and a second light emitting element for the second light distribution pattern that illuminates the front side of the vehicle with respect to the first light distribution pattern. It includes an array, a third light emitting element for an additional light distribution pattern, and a projection lens.
  • the array of the first light emitting element, the array of the second light emitting element, and the third light emitting element are mounted on the same substrate. The light emitted from the array of the first light emitting element, the array of the second light emitting element, and the third light emitting element is irradiated to the front of the lamp through the same projection lens.
  • the third light distribution that is wider and has a lower luminous intensity than the first light distribution pattern and the second light distribution pattern. A pattern is formed.
  • the substrate may be arranged at an angle with respect to a plane perpendicular to the optical axis of the projection lens.
  • a light guide body having an incident portion that incidents light from the third light emitting element, a light guide portion that guides the incident light, and an exit portion that emits the guided light. And may be further provided.
  • the exit portion of the light guide may be arranged at or near the focal point of the projection lens.
  • the array of the first light emitting element and the array of the second light emitting element are arranged at or near the focal point of the projection lens, and the array of the first light emitting element has a wiring pattern formed on the substrate.
  • the third light emitting element may be arranged so as to be separated from the first light emitting element with a wiring pattern interposed therebetween.
  • a light-shielding cover arranged so as to cover the light guide body may be further provided.
  • the light-shielding cover may be made of metal.
  • a desired light distribution pattern can be formed even when some of the light emitting elements cannot be arranged near the focal point of the projection lens.
  • FIG. 1 is a perspective view of a vehicle lamp 10 according to an embodiment of the present invention.
  • FIG. 2 is a front view of the vehicle lamp 10.
  • FIG. 3 is a side view of the vehicle lamp 10.
  • FIG. 4 is an exploded perspective view of the vehicle lamp 10.
  • the vehicle lighting fixtures 10 are arranged at both left and right ends of the front portion of the vehicle body, and function as headlights.
  • the vehicle lighting fixture 10 is configured to be able to form a high beam light distribution pattern and a low beam light distribution pattern that illuminates the front side of the vehicle from the high beam light distribution pattern. Further, the vehicle lighting fixture 10 is configured to be able to form an ADB (Adaptive Driving Beam) light distribution pattern that dynamically and adaptively controls the high beam orientation pattern based on the surrounding state of the vehicle. Further, the vehicle lamp 10 is configured so that an additional light distribution pattern can be formed. In the vehicle lamp 10 according to the present embodiment, the high beam light distribution pattern, the low beam light distribution pattern, and the additional light distribution pattern are combined, so that the daytime is wider than the high beam light distribution pattern and the low beam light distribution pattern. A light distribution pattern for running is formed.
  • ADB Adaptive Driving Beam
  • the vehicle lamp 10 is a so-called direct-fire type lamp.
  • the vehicle lighting equipment 10 includes a projection lens 12, a lens holder 14 for holding the projection lens 12, a substrate 16, a plurality of LEDs 18 arranged on the substrate, a connector 19 for supplying power to the LEDs 18, and a reflector. 20, a light guide body 22, a heat sink 24 for dissipating heat generated from the LED 18, a fan 26 for forcibly cooling the heat sink 24, a fan cover 28 for covering the fan 26, and a light-shielding cover 32. , Equipped with.
  • FIG. 5 is a schematic plan view of the substrate 16.
  • the substrate 16 is arranged on the substrate mounting surface 24a (see FIG. 4) formed on the heat sink 24.
  • a plurality of low beam LEDs 18a are arranged in an array on the upper part of the substrate 16.
  • a plurality of high beam LEDs 18b are arranged in an array slightly below the low beam LED 18a.
  • two daytime running LEDs 18c are arranged below the high beam LED 18b with a large interval.
  • the array of low beam LEDs 18a, the array of high beam LEDs 18b, and the daytime running LEDs 18c are mounted on the same substrate 16.
  • a connector 19 for supplying power to the low beam LED 18a, the high beam LED 18b, and the daytime running LED 18c is arranged.
  • the reason why the high beam LED 18b and the daytime running LED 18c are separated is that the wiring pattern 17 from the connector 19 to the high beam LED 18b is sandwiched between them.
  • the high beam LED 18b can be individually turned on and off for ADB control. Therefore, the array-shaped high beam LEDs 18b are connected in parallel, and it is necessary to widen the formation region of the wiring pattern 17. Due to the wiring pattern 17 for the high beam LED 18b, the daytime running LED 18c cannot be arranged near the high beam LED 18b.
  • the array-shaped low beam LEDs 18a are connected in series because they are not turned on and off individually.
  • the switching IC may be arranged in the middle of the wiring pattern 17 connecting the low beam LED 18a and the high beam LED 18b to the connector 19.
  • This switching IC controls the emission intensity of the low beam LED 18a and the high beam LED 18b by PWM (Pulse Width Modulation) control.
  • PWM Pulse Width Modulation
  • the deviation of the emission wavelength of the LED can be made relatively small and the light can be dimmed by controlling the duty ratio.
  • This switching IC needs to be arranged as close as possible to the high beam LED 18b.
  • FIG. 6 is a diagram for explaining a main part of the vehicle lamp 10 according to the embodiment of the present invention.
  • components such as the projection lens 12, the lens holder 14, and the light-shielding cover 32 have been removed.
  • FIG. 7 is a schematic cross-sectional view taken along the line AA of the vehicle lamp 10 shown in FIG.
  • the low beam LED 18a and the high beam LED 18b are arranged at or near the rear focal point F of the projection lens 12. Therefore, the image on the focal plane including the rear focal point F formed by the light emitted from the low beam LED 18a and the high beam LED 18b is projected in front of the lamp as an inverted image by the projection lens 12.
  • a beam shaper 30 is arranged between the low beam LED 18a and the high beam LED 18b. The beam shaper 30 blocks a part of the light emitted from the low beam LED 18a to form a cut-off line of the low beam light distribution pattern.
  • FIG. 7 shows the light L1 emitted from the low beam LED 18a and the light L2 emitted from the high beam LED 18b.
  • the substrate 16 is arranged so as to be inclined with respect to a plane perpendicular to the optical axis Ax of the projection lens 12.
  • the high beam LED 18b is positioned closer to the projection lens 12 than the low beam LED 18a.
  • the high beam LED 18b can be brought closer to the rear focal point F of the projection lens 12 as compared with the case where the substrate 16 is arranged perpendicular to the optical axis Ax of the projection lens 12 without being tilted.
  • the luminosity of the light pattern can be increased.
  • the low beam LED 18a is located from the rear focal point F of the projection lens 12 as compared with the case where the substrate 16 is arranged perpendicular to the optical axis Ax of the projection lens 12 without tilting the substrate 16.
  • the light intensity of the low-beam light distribution pattern decreases as the distance increases, but there is no problem because the low-beam light distribution pattern does not require as high a luminous intensity as the high-beam light distribution pattern. Further, since the cut-off line of the low beam light distribution pattern is formed by the beam shaper 30, there is no problem with the shape of the low beam light distribution pattern.
  • FIG. 8 is a diagram for explaining a light distribution pattern formed on a virtual vertical screen arranged at a position 25 m in front of the vehicle.
  • the light L1 emitted from the low beam LED 18a is projected by the projection lens 12, so that the low beam light distribution pattern Lo is formed on the virtual vertical screen.
  • the light L2 emitted from the high beam LED 18b is projected by the projection lens 12, so that the high beam light distribution pattern Hi is formed on the virtual vertical screen.
  • the daytime running LED 18c is used to form the first additional light distribution pattern AD1 that fills the area AR1 and the second additional light distribution pattern AD2 that fills the area AR2.
  • the daytime running LED 18c is arranged in the vicinity of the rear focal point F, similarly to the low beam LED 18a and the high beam LED 18b.
  • the first additional light distribution pattern AD1 and the second additional light distribution pattern AD2 are formed by using the light guide body 22.
  • the light guide body 22 includes an incident portion 22a, a light guide portion 22b, a reflection portion 22c, a first emission portion 22d, and a second emission portion 22e.
  • the incident portion 22a is arranged above the daytime running LED 18c, and the light from the daytime running LED 18c is incident inside.
  • the incident portion 22a is formed with a Fresnel step for converting the light from the daytime running LED 18c into parallel light.
  • the reflecting portion 22c reflects the light incident inside from the incident portion 22a.
  • the reflecting portion 22c is composed of a plurality of reflecting surfaces.
  • the light guide unit 22b is a substantially plate-shaped light guide plate, and guides a part of the light reflected by the reflection unit 22c.
  • the first emitting unit 22d is provided at the tip of the light guide unit 22b, and emits the light guided by the light guide unit 22b to the outside.
  • the first emitting unit 22d is formed with a step for refracting the light guided by the light guide unit 22b and emitting it in a predetermined external direction.
  • the second emitting unit 22e is provided in the vicinity of the reflecting unit 22c, and emits a part of the light reflected by the reflecting unit 22c to the outside.
  • the light L4 emitted from the second exit portion 22e of the light guide body 22 is guided by sandwiching the low beam LED 18a and the high beam LED 18b. It is reflected by the reflector 20 located on the opposite side of the light body 22. Then, the light L4 emitted from the second exit portion 22e of the light guide body 22 is projected by the projection lens 12, so that the second additional light distribution pattern AD2 is formed on the virtual vertical screen in front of the lamp.
  • the low beam light distribution pattern Lo By simultaneously lighting the array of low beam LEDs 18a, the array of high beam LEDs 18b, and the daytime running LED 18c, as shown in FIG. 8, the low beam light distribution pattern Lo, the high beam light distribution pattern Hi, and the first The additional light distribution pattern AD1 and the second additional light distribution pattern AD2 can be combined to form the daytime running light distribution pattern DR.
  • Light distribution pattern can be formed.
  • a vehicle headlight is composed of a plurality of condensing type or diffusing type lamp units in which an LED is used as a light source and a reflector and a lens are combined, and all or a selected part of these lamp units. Is lit, and the light emitted from the lit lamp unit is combined to obtain a desired light distribution pattern.
  • a light distribution pattern for a high beam is obtained by lighting a lamp unit having a high light-collecting property
  • a light distribution pattern for a low beam is obtained by lighting a lamp unit having a high diffusivity.
  • an array of low beam LEDs 18a, an array of high beam LEDs 18b, and a daytime running LED 18c are mounted on the same substrate 16. Further, the light emitted from the array of low beam LEDs 18a, the array of high beam LEDs 18b, and the daytime running LED 18c is irradiated to the front of the lamp through the same projection lens 12.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • Mathematical Physics (AREA)
  • Mechanical Engineering (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

A vehicle lamp (10) is provided with: a projection lens (12): a low-beam LED (18a) and a high-beam LED (18b) arranged on or near the rear-side focal point F of the projection lens (12); a daytime running LED (18c); and a light guide body (22) having a light entering part (22a) through which light from the daytime running LED (18c) enters, a light guide part (22b) that guides the entering light, and a first exit part (22d) through which the guided light is outputted. The first exit part (22d) of the light guide body (22) is disposed on or near the rear-side focal point F of the projection lens (12).

Description

車両用灯具Vehicle lighting
　本発明は、車両用灯具に関する。 The present invention relates to a vehicle lamp.
　従来、発光ダイオード（Light Emitting Diode：以下、適宜「ＬＥＤ」と称す）などの発光素子を利用した車両用灯具の開発が進められている（例えば特許文献１参照）。また、車両用前照灯の光源として発光素子を用いる場合は、一つでは所望の光量や形状の配光パターンを得ることが難しいため、複数の発光素子を基板上に配置した車両用灯具が提案されている（例えば特許文献２参照）。 Conventionally, the development of vehicle lamps using light emitting elements such as light emitting diodes (hereinafter, appropriately referred to as "LEDs") has been promoted (see, for example, Patent Document 1). Further, when a light emitting element is used as a light source of a vehicle headlight, it is difficult to obtain a light distribution pattern of a desired amount and shape by one, so a vehicle lighting tool in which a plurality of light emitting elements are arranged on a substrate is used. It has been proposed (see, for example, Patent Document 2).
特開２００４－９５４８０号公報Japanese Unexamined Patent Publication No. 2004-95480 特開２０１６－１４９３７３号公報Japanese Unexamined Patent Publication No. 2016-149373
　複数の発光素子を用いた車両用灯具においては、一部の発光素子を投影レンズの焦点付近に配置した場合、他の発光素子を投影レンズの焦点付近に配置できず、所望の配光パターンを得ることが難しい場合がある。 In a vehicle lamp using a plurality of light emitting elements, when some light emitting elements are arranged near the focal point of the projection lens, other light emitting elements cannot be arranged near the focal point of the projection lens, and a desired light distribution pattern can be obtained. It can be difficult to obtain.
　本発明はこうした状況に鑑みてなされたものであり、その目的は、複数の発光素子を用いた車両用灯具において、一部の発光素子を投影レンズの焦点付近に配置できない場合でも、所望の配光パターンを形成することのできる技術を提供することにある。 The present invention has been made in view of such a situation, and an object of the present invention is to provide a desired arrangement even when some of the light emitting elements cannot be arranged near the focal point of the projection lens in a vehicle lamp using a plurality of light emitting elements. The purpose is to provide a technique capable of forming an optical pattern.
　上記課題を解決するために、本発明のある態様の車両用灯具は、投影レンズと、投影レンズの焦点またはその近傍に配置された第１発光素子と、第２発光素子と、第２発光素子からの光を入射する入射部と、入射した光を導光する導光部と、導光された光を出射する出射部とを有する導光体と、を備える。導光体の出射部は、投影レンズの焦点またはその近傍に配置される。 In order to solve the above problems, a vehicle lamp according to an embodiment of the present invention includes a projection lens, a first light emitting element arranged at or near the focal point of the projection lens, a second light emitting element, and a second light emitting element. It is provided with an incident portion for incident light from the light, a light guide portion for guiding the incident light, and a light guide body having an exit portion for emitting the guided light. The exit portion of the light guide is arranged at or near the focal point of the projection lens.
　上記態様の車両用灯具において、第１発光素子と第２発光素子は、同一の基板上に配置されてもよい。 In the vehicle lighting equipment of the above aspect, the first light emitting element and the second light emitting element may be arranged on the same substrate.
　上記態様の車両用灯具において、導光体は、入射した光を出射する第２の出射部を有してもよい。車両用灯具は、第２の出射部から出射された光を投影レンズに向けて反射するリフレクタをさらに備えてもよい。 In the vehicle lighting equipment of the above aspect, the light guide body may have a second emitting portion for emitting the incident light. The vehicle lighting fixture may further include a reflector that reflects the light emitted from the second exit portion toward the projection lens.
　上記態様の車両用灯具において、第１発光素子は、ロービーム用の発光素子と、ハイビーム用の発光素子とを含んでもよい。第２発光素子は、デイタイムランニング用の発光素子を含んでもよい。 In the vehicle lighting equipment of the above aspect, the first light emitting element may include a light emitting element for a low beam and a light emitting element for a high beam. The second light emitting element may include a light emitting element for daytime running.
　上記態様の車両用灯具において、導光体の出射部から出射された光は、ロービーム用配光パターンおよびハイビーム用配光パターンよりも上方の領域に向けて照射され、導光体の第２の出射部から出射された光は、ロービーム用配光パターンの略中央領域に向けて照射されてもよい。 In the vehicle lighting equipment of the above aspect, the light emitted from the light emitting portion of the light guide body is irradiated toward the region above the low beam light distribution pattern and the high beam light distribution pattern, and is the second light guide body. The light emitted from the emitting portion may be emitted toward a substantially central region of the low beam light distribution pattern.
　本発明の別の態様も、車両用灯具である。この車両用灯具は、基板と、第１配光パターン用の第１発光素子のアレイと、第１配光パターンよりも自車手前側を照射する第２配光パターン用の第２発光素子のアレイと、追加配光パターン用の第３発光素子と、投影レンズと、を備える。第１発光素子のアレイ、第２発光素子のアレイおよび第３発光素子は、同一の基板上に実装される。第１発光素子のアレイ、第２発光素子のアレイおよび第３発光素子から出射される光は、同一の投影レンズを介して灯具前方に照射される。第１発光素子のアレイと、第２発光素子のアレイと、第３発光素子とを同時点灯することで、第１配光パターンおよび第２配光パターンよりも広く且つ光度が低い第３配光パターンが形成される。 Another aspect of the present invention is a vehicle lamp. This vehicle lamp has a substrate, an array of first light emitting elements for the first light distribution pattern, and a second light emitting element for the second light distribution pattern that illuminates the front side of the vehicle with respect to the first light distribution pattern. It includes an array, a third light emitting element for an additional light distribution pattern, and a projection lens. The array of the first light emitting element, the array of the second light emitting element, and the third light emitting element are mounted on the same substrate. The light emitted from the array of the first light emitting element, the array of the second light emitting element, and the third light emitting element is irradiated to the front of the lamp through the same projection lens. By simultaneously lighting the array of the first light emitting element, the array of the second light emitting element, and the third light emitting element, the third light distribution that is wider and has a lower luminous intensity than the first light distribution pattern and the second light distribution pattern. A pattern is formed.
　上記態様の車両用灯具において、基板は、投影レンズの光軸に垂直な平面に対して傾斜して配置されてもよい。 In the vehicle lamp of the above aspect, the substrate may be arranged at an angle with respect to a plane perpendicular to the optical axis of the projection lens.
　上記態様の車両用灯具において、第３発光素子からの光を入射する入射部と、入射した光を導光する導光部と、導光された光を出射する出射部とを有する導光体と、をさらに備えてもよい。導光体の出射部は、投影レンズの焦点またはその近傍に配置されてもよい。 In the vehicle lamp of the above aspect, a light guide body having an incident portion that incidents light from the third light emitting element, a light guide portion that guides the incident light, and an exit portion that emits the guided light. And may be further provided. The exit portion of the light guide may be arranged at or near the focal point of the projection lens.
　上記態様の車両用灯具において、第１発光素子のアレイおよび第２発光素子のアレイは、投影レンズの焦点またはその近傍に配置され、第１発光素子のアレイは、基板に形成された配線パターンを介して個別に点消灯可能に構成され、第３発光素子は、配線パターンを挟んで第１発光素子から離隔して配置されてもよい。 In the vehicle lamp of the above aspect, the array of the first light emitting element and the array of the second light emitting element are arranged at or near the focal point of the projection lens, and the array of the first light emitting element has a wiring pattern formed on the substrate. The third light emitting element may be arranged so as to be separated from the first light emitting element with a wiring pattern interposed therebetween.
　上記態様の車両用灯具において、導光体を覆うように配置された遮光カバーをさらに備えてもよい。遮光カバーは、金属製であってもよい。 In the vehicle lighting equipment of the above aspect, a light-shielding cover arranged so as to cover the light guide body may be further provided. The light-shielding cover may be made of metal.
　本発明によれば、複数の発光素子を用いた車両用灯具において、一部の発光素子を投影レンズの焦点付近に配置できない場合でも、所望の配光パターンを形成することができる。 According to the present invention, in a vehicle lamp using a plurality of light emitting elements, a desired light distribution pattern can be formed even when some of the light emitting elements cannot be arranged near the focal point of the projection lens.
本発明の実施形態に係る車両用灯具の斜視図である。It is a perspective view of the lighting fixture for a vehicle which concerns on embodiment of this invention. 車両用灯具の正面図である。It is a front view of a vehicle lamp. 車両用灯具の側面図である。It is a side view of a vehicle lamp. 車両用灯具の分解斜視図である。It is an exploded perspective view of a vehicle lamp. 基板の概略平面図である。It is a schematic plan view of a substrate. 本発明の実施形態に係る車両用灯具の要部を説明するための図である。It is a figure for demonstrating the main part of the vehicle lighting equipment which concerns on embodiment of this invention. 図３に示す車両用灯具の概略Ａ－Ａ断面図である。It is schematic AA sectional view of the vehicle lamp shown in FIG. 仮想鉛直スクリーン上に形成される配光パターンを説明するための図である。It is a figure for demonstrating the light distribution pattern formed on a virtual vertical screen. 導光体を示す斜視図である。It is a perspective view which shows the light guide body. 導光体を示す斜視図である。It is a perspective view which shows the light guide body. 導光体を示す斜視図である。It is a perspective view which shows the light guide body.
　以下、図面を参照しながら、本発明を実施するための形態について詳細に説明する。なお、図面の説明において同一の要素には同一の符号を付し、重複する説明を適宜省略する。また、本明細書において「上」、「下」、「前」、「後」、「左」、「右」、「内」、「外」等の方向を表す用語が用いられる場合、それらは車両用灯具が車両に装着されたときの姿勢における方向を意味する。 Hereinafter, a mode for carrying out the present invention will be described in detail with reference to the drawings. In the description of the drawings, the same elements are designated by the same reference numerals, and duplicate description will be omitted as appropriate. In addition, when terms such as "upper", "lower", "front", "rear", "left", "right", "inside", and "outside" are used in the present specification, they are used. It means the direction in the posture when the vehicle lamp is attached to the vehicle.
　図１は、本発明の実施形態に係る車両用灯具１０の斜視図である。図２は、車両用灯具１０の正面図である。図３は、車両用灯具１０の側面図である。図４は、車両用灯具１０の分解斜視図である。車両用灯具１０は、車体の前部の左右両端部にそれぞれ配置され、前照灯として機能する。 FIG. 1 is a perspective view of a vehicle lamp 10 according to an embodiment of the present invention. FIG. 2 is a front view of the vehicle lamp 10. FIG. 3 is a side view of the vehicle lamp 10. FIG. 4 is an exploded perspective view of the vehicle lamp 10. The vehicle lighting fixtures 10 are arranged at both left and right ends of the front portion of the vehicle body, and function as headlights.
　車両用灯具１０は、ハイビーム用配光パターンと、ハイビーム用配光パターンよりも自車手前側を照射するロービーム用配光パターンとを形成できるように構成されている。また、車両用灯具１０は、車両の周囲の状態にもとづいて、ハイビーム用配向パターンを動的、適応的に制御するＡＤＢ（Adaptive Driving Beam）配光パターンを形成できるように構成されている。さらに、車両用灯具１０は、追加配光パターンを形成できるように構成されている。本実施形態に係る車両用灯具１０では、ハイビーム用配光パターン、ロービーム用配光パターンおよび追加配光パターンが合成されることにより、ハイビーム用配光パターンおよびロービーム用配光パターンよりも広いデイタイムランニング用の配光パターンが形成される。なお、デイタイムランニング用配光パターンを形成する際には、ハイビーム用の光源は通常時（すなわちハイビーム用配光パターン形成時）の百分の一程度に減光され、ロービーム用の光源は通常時（すなわちロービーム用配光パターン形成時）の数十分の一程度に減光される。 The vehicle lighting fixture 10 is configured to be able to form a high beam light distribution pattern and a low beam light distribution pattern that illuminates the front side of the vehicle from the high beam light distribution pattern. Further, the vehicle lighting fixture 10 is configured to be able to form an ADB (Adaptive Driving Beam) light distribution pattern that dynamically and adaptively controls the high beam orientation pattern based on the surrounding state of the vehicle. Further, the vehicle lamp 10 is configured so that an additional light distribution pattern can be formed. In the vehicle lamp 10 according to the present embodiment, the high beam light distribution pattern, the low beam light distribution pattern, and the additional light distribution pattern are combined, so that the daytime is wider than the high beam light distribution pattern and the low beam light distribution pattern. A light distribution pattern for running is formed. When forming a light distribution pattern for daytime running, the light source for high beam is dimmed to about one-hundredth of the normal time (that is, when the light distribution pattern for high beam is formed), and the light source for low beam is usually dimmed. It is dimmed to about one tenth of the time (that is, when the light distribution pattern for low beam is formed).
　車両用灯具１０は、所謂直射型の灯具である。車両用灯具１０は、投影レンズ１２と、投影レンズ１２を保持するためのレンズホルダ１４と、基板１６と、基板上に配置された複数のＬＥＤ１８と、ＬＥＤ１８に給電するためのコネクタ１９と、リフレクタ２０と、導光体２２と、ＬＥＤ１８から発生した熱を放熱するためのヒートシンク２４と、ヒートシンク２４を強制的に冷却するためのファン２６と、ファン２６を覆うファンカバー２８と、遮光カバー３２と、を備える。 The vehicle lamp 10 is a so-called direct-fire type lamp. The vehicle lighting equipment 10 includes a projection lens 12, a lens holder 14 for holding the projection lens 12, a substrate 16, a plurality of LEDs 18 arranged on the substrate, a connector 19 for supplying power to the LEDs 18, and a reflector. 20, a light guide body 22, a heat sink 24 for dissipating heat generated from the LED 18, a fan 26 for forcibly cooling the heat sink 24, a fan cover 28 for covering the fan 26, and a light-shielding cover 32. , Equipped with.
　図５は、基板１６の概略平面図である。基板１６は、ヒートシンク２４に形成された基板搭載面２４ａ（図４参照）上に配置される。図５に示すように、基板１６の上部に複数のロービーム用ＬＥＤ１８ａがアレイ状に配置されている。また、ロービーム用ＬＥＤ１８ａより僅か下方に、複数のハイビーム用ＬＥＤ１８ｂがアレイ状に配置されている。また、ハイビーム用ＬＥＤ１８ｂの下方には大きく間隔をおいて２つのデイタイムランニング用ＬＥＤ１８ｃが配置されている。このように、ロービーム用ＬＥＤ１８ａのアレイ、ハイビーム用ＬＥＤ１８ｂのアレイ、およびデイタイムランニング用ＬＥＤ１８ｃは、同一の基板１６上に実装されている。基板１６の下部には、ロービーム用ＬＥＤ１８ａ、ハイビーム用ＬＥＤ１８ｂおよびデイタイムランニング用ＬＥＤ１８ｃに給電するためのコネクタ１９が配置されている。ハイビーム用ＬＥＤ１８ｂとデイタイムランニング用ＬＥＤ１８ｃとが離隔しているのは、コネクタ１９からハイビーム用ＬＥＤ１８ｂへの配線パターン１７が間に挟まれているためである。ハイビーム用ＬＥＤ１８ｂは、ＡＤＢ制御のために、個別に点消灯可能とされる。そのために、アレイ状のハイビーム用ＬＥＤ１８ｂは並列に接続されており、配線パターン１７の形成領域を広くとる必要がある。このハイビーム用ＬＥＤ１８ｂのための配線パターン１７により、デイタイムランニング用ＬＥＤ１８ｃをハイビーム用ＬＥＤ１８ｂの近くに配置することができない。一方、アレイ状のロービーム用ＬＥＤ１８ａは、個別に点消灯されないため、直列に接続されている。 FIG. 5 is a schematic plan view of the substrate 16. The substrate 16 is arranged on the substrate mounting surface 24a (see FIG. 4) formed on the heat sink 24. As shown in FIG. 5, a plurality of low beam LEDs 18a are arranged in an array on the upper part of the substrate 16. Further, a plurality of high beam LEDs 18b are arranged in an array slightly below the low beam LED 18a. Further, two daytime running LEDs 18c are arranged below the high beam LED 18b with a large interval. As described above, the array of low beam LEDs 18a, the array of high beam LEDs 18b, and the daytime running LEDs 18c are mounted on the same substrate 16. At the lower part of the substrate 16, a connector 19 for supplying power to the low beam LED 18a, the high beam LED 18b, and the daytime running LED 18c is arranged. The reason why the high beam LED 18b and the daytime running LED 18c are separated is that the wiring pattern 17 from the connector 19 to the high beam LED 18b is sandwiched between them. The high beam LED 18b can be individually turned on and off for ADB control. Therefore, the array-shaped high beam LEDs 18b are connected in parallel, and it is necessary to widen the formation region of the wiring pattern 17. Due to the wiring pattern 17 for the high beam LED 18b, the daytime running LED 18c cannot be arranged near the high beam LED 18b. On the other hand, the array-shaped low beam LEDs 18a are connected in series because they are not turned on and off individually.
　別の実施形態においては、ロービーム用ＬＥＤ１８ａおよびハイビーム用ＬＥＤ１８ｂとコネクタ１９とつなぐ配線パターン１７の中途にスイッチングＩＣが配置されてもよい。このスイッチングＩＣは、ＰＷＭ(Pulse Width Modulation)制御によりロービーム用ＬＥＤ１８ａおよびハイビーム用ＬＥＤ１８ｂの発光強度を制御する。ロービーム用ＬＥＤ１８ａおよびハイビーム用ＬＥＤ１８ｂを減光する方法としては、駆動電流を減らすことでも可能であるが、ＬＥＤの発光波長がずれることに起因して発光色がずれる可能性がある。一方、ＰＷＭ制御を用いる方法では、Ｄｕｔｙ比を制御することでＬＥＤの発光波長のずれを比較的小さくして減光できる。このスイッチングＩＣは、ハイビーム用ＬＥＤ１８ｂのできるだけ近くに配置する必要がある。これは、ハイビーム用ＬＥＤ１８ｂを通常時の百分の一程度に減光する場合、Ｄｕｔｙ比が通常時の百分の一程度と非常に短くなるためである。したがって、このような別の実施形態においてはさらに、デイタイムランニング用ＬＥＤ１８ｃをハイビーム用ＬＥＤ１８ｂの近くに配置することが難しくなる。 In another embodiment, the switching IC may be arranged in the middle of the wiring pattern 17 connecting the low beam LED 18a and the high beam LED 18b to the connector 19. This switching IC controls the emission intensity of the low beam LED 18a and the high beam LED 18b by PWM (Pulse Width Modulation) control. As a method of dimming the low beam LED 18a and the high beam LED 18b, it is possible to reduce the drive current, but there is a possibility that the emission color shifts due to the deviation of the emission wavelength of the LED. On the other hand, in the method using PWM control, the deviation of the emission wavelength of the LED can be made relatively small and the light can be dimmed by controlling the duty ratio. This switching IC needs to be arranged as close as possible to the high beam LED 18b. This is because when the high beam LED 18b is dimmed to about one-hundredth of the normal time, the duty ratio becomes very short, about one-hundredth of the normal time. Therefore, in such another embodiment, it becomes more difficult to arrange the daytime running LED 18c near the high beam LED 18b.
　図６は、本発明の実施形態に係る車両用灯具１０の要部を説明するための図である。図６では、投影レンズ１２、レンズホルダ１４、遮光カバー３２等の構成部品は取り外されている。また、図７は、図３に示す車両用灯具１０の概略Ａ－Ａ断面図である。 FIG. 6 is a diagram for explaining a main part of the vehicle lamp 10 according to the embodiment of the present invention. In FIG. 6, components such as the projection lens 12, the lens holder 14, and the light-shielding cover 32 have been removed. Further, FIG. 7 is a schematic cross-sectional view taken along the line AA of the vehicle lamp 10 shown in FIG.
　図７に示すように、ロービーム用ＬＥＤ１８ａおよびハイビーム用ＬＥＤ１８ｂは、投影レンズ１２の後側焦点Ｆまたはその近傍に配置されている。従って、ロービーム用ＬＥＤ１８ａ、ハイビーム用ＬＥＤ１８ｂから出射された光により形成される後側焦点Ｆを含む焦点面上の像は、投影レンズ１２によって反転像として灯具前方に投影される。図６に示すように、ロービーム用ＬＥＤ１８ａとハイビーム用ＬＥＤ１８ｂの間には、ビームシェーパ３０が配置されている。ビームシェーパ３０は、ロービーム用ＬＥＤ１８ａから出射された光の一部を遮断して、ロービーム用配光パターンのカットオフラインを形成するものである。図７には、ロービーム用ＬＥＤ１８ａから出射された光Ｌ１およびハイビーム用ＬＥＤ１８ｂから出射された光Ｌ２が図示されている。 As shown in FIG. 7, the low beam LED 18a and the high beam LED 18b are arranged at or near the rear focal point F of the projection lens 12. Therefore, the image on the focal plane including the rear focal point F formed by the light emitted from the low beam LED 18a and the high beam LED 18b is projected in front of the lamp as an inverted image by the projection lens 12. As shown in FIG. 6, a beam shaper 30 is arranged between the low beam LED 18a and the high beam LED 18b. The beam shaper 30 blocks a part of the light emitted from the low beam LED 18a to form a cut-off line of the low beam light distribution pattern. FIG. 7 shows the light L1 emitted from the low beam LED 18a and the light L2 emitted from the high beam LED 18b.
　図７に示すように、本実施形態においては、基板１６は、投影レンズ１２の光軸Ａｘに垂直な平面に対して傾斜して配置される。これにより、ハイビーム用ＬＥＤ１８ｂは、ロービーム用ＬＥＤ１８ａよりも投影レンズ１２の近くに位置にすることとなる。これにより、基板１６を傾斜させずに投影レンズ１２の光軸Ａｘに垂直に配置した場合と比較して、ハイビーム用ＬＥＤ１８ｂを投影レンズ１２の後側焦点Ｆに近づけることができるので、ハイビーム用配光パターンの光度を高くすることができる。なお、このように基板１６を配置した場合、基板１６を傾斜させずに投影レンズ１２の光軸Ａｘに垂直に配置した場合と比較して、ロービーム用ＬＥＤ１８ａは投影レンズ１２の後側焦点Ｆから遠ざかることとなり、ロービーム用配光パターンの光度は低下するが、ロービーム用配光パターンはハイビーム用配光パターンほど高い光度が要求されないため問題はない。また、ロービーム用配光パターンのカットオフラインは、ビームシェーパ３０で形成されるため、ロービーム用配光パターンの形状に関しても問題はない。 As shown in FIG. 7, in the present embodiment, the substrate 16 is arranged so as to be inclined with respect to a plane perpendicular to the optical axis Ax of the projection lens 12. As a result, the high beam LED 18b is positioned closer to the projection lens 12 than the low beam LED 18a. As a result, the high beam LED 18b can be brought closer to the rear focal point F of the projection lens 12 as compared with the case where the substrate 16 is arranged perpendicular to the optical axis Ax of the projection lens 12 without being tilted. The luminosity of the light pattern can be increased. When the substrate 16 is arranged in this way, the low beam LED 18a is located from the rear focal point F of the projection lens 12 as compared with the case where the substrate 16 is arranged perpendicular to the optical axis Ax of the projection lens 12 without tilting the substrate 16. The light intensity of the low-beam light distribution pattern decreases as the distance increases, but there is no problem because the low-beam light distribution pattern does not require as high a luminous intensity as the high-beam light distribution pattern. Further, since the cut-off line of the low beam light distribution pattern is formed by the beam shaper 30, there is no problem with the shape of the low beam light distribution pattern.
　図８は、車両前方２５ｍの位置に配置された仮想鉛直スクリーン上に形成される配光パターンを説明するための図である。ロービーム用ＬＥＤ１８ａから出射された光Ｌ１が投影レンズ１２により投影されることにより、仮想鉛直スクリーン上にロービーム用配光パターンＬｏが形成される。また、ハイビーム用ＬＥＤ１８ｂから出射された光Ｌ２が投影レンズ１２により投影されることにより、仮想鉛直スクリーン上にハイビーム用配光パターンＨｉが形成される。ここで、ロービーム用配光パターンＬｏとハイビーム用配光パターンＨｉとを減光した上で合成し、デイタイムランニング用配光パターンＤＲを形成することを考えた場合、ロービーム用配光パターンＬｏおよびハイビーム用配光パターンＨｉよりも上方の領域ＡＲ１と、ロービーム用配光パターンＬｏの略中央領域ＡＲ２の光量が法規で規定された値に対して不足する可能性がある。そこで、本実施形態では、デイタイムランニング用ＬＥＤ１８ｃを用いて、領域ＡＲ１を埋める第１追加配光パターンＡＤ１および領域ＡＲ２を埋める第２追加配光パターンＡＤ２を形成する。 FIG. 8 is a diagram for explaining a light distribution pattern formed on a virtual vertical screen arranged at a position 25 m in front of the vehicle. The light L1 emitted from the low beam LED 18a is projected by the projection lens 12, so that the low beam light distribution pattern Lo is formed on the virtual vertical screen. Further, the light L2 emitted from the high beam LED 18b is projected by the projection lens 12, so that the high beam light distribution pattern Hi is formed on the virtual vertical screen. Here, when it is considered that the low beam light distribution pattern Lo and the high beam light distribution pattern Hi are combined after dimming to form the daytime running light distribution pattern DR, the low beam light distribution pattern Lo and the low beam light distribution pattern Lo and There is a possibility that the amount of light in the region AR1 above the high beam light distribution pattern Hi and the substantially central region AR2 of the low beam light distribution pattern Lo may be insufficient with respect to the values specified by law. Therefore, in the present embodiment, the daytime running LED 18c is used to form the first additional light distribution pattern AD1 that fills the area AR1 and the second additional light distribution pattern AD2 that fills the area AR2.
　所望の追加配光パターンを形成するためには、デイタイムランニング用ＬＥＤ１８ｃは、ロービーム用ＬＥＤ１８ａおよびハイビーム用ＬＥＤ１８ｂと同様に、後側焦点Ｆの近傍に配置することが望ましい。しかしながら実際には、上述したようにハイビーム用ＬＥＤ１８ｂの配線パターン１７の存在により、後側焦点Ｆの近傍に配置することができない。そこで、本実施形態に係る車両用灯具１０では、導光体２２を用いて第１追加配光パターンＡＤ１および第２追加配光パターンＡＤ２を形成する。 In order to form the desired additional light distribution pattern, it is desirable that the daytime running LED 18c is arranged in the vicinity of the rear focal point F, similarly to the low beam LED 18a and the high beam LED 18b. However, in reality, as described above, due to the presence of the wiring pattern 17 of the high beam LED 18b, it cannot be arranged in the vicinity of the rear focal point F. Therefore, in the vehicle lamp 10 according to the present embodiment, the first additional light distribution pattern AD1 and the second additional light distribution pattern AD2 are formed by using the light guide body 22.
　図９、図１０および図１１は、導光体２２を示す斜視図である。導光体２２は、入射部２２ａと、導光部２２ｂと、反射部２２ｃと、第１出射部２２ｄと、第２出射部２２ｅと、を有する。 9, 10 and 11 are perspective views showing the light guide body 22. The light guide body 22 includes an incident portion 22a, a light guide portion 22b, a reflection portion 22c, a first emission portion 22d, and a second emission portion 22e.
　入射部２２ａは、デイタイムランニング用ＬＥＤ１８ｃの上方に配置され、デイタイムランニング用ＬＥＤ１８ｃからの光を内部に入射する。入射部２２ａには、デイタイムランニング用ＬＥＤ１８ｃからの光を平行光にするためのフレネルステップが形成されている。反射部２２ｃは、入射部２２ａから内部に入射した光を反射する。反射部２２ｃは、複数の反射面から構成されている。導光部２２ｂは、略板状の導光板であり、反射部２２ｃで反射した光の一部を導光する。第１出射部２２ｄは、導光部２２ｂの先端部に設けられており、導光部２２ｂを導光された光を外部に出射する。第１出射部２２ｄには、導光部２２ｂを導光された光を屈折させて外部の所定の方向に出射させるためのステップが形成されている。第２出射部２２ｅは、反射部２２ｃの近傍に設けられており、反射部２２ｃで反射した光の一部を外部に出射する。 The incident portion 22a is arranged above the daytime running LED 18c, and the light from the daytime running LED 18c is incident inside. The incident portion 22a is formed with a Fresnel step for converting the light from the daytime running LED 18c into parallel light. The reflecting portion 22c reflects the light incident inside from the incident portion 22a. The reflecting portion 22c is composed of a plurality of reflecting surfaces. The light guide unit 22b is a substantially plate-shaped light guide plate, and guides a part of the light reflected by the reflection unit 22c. The first emitting unit 22d is provided at the tip of the light guide unit 22b, and emits the light guided by the light guide unit 22b to the outside. The first emitting unit 22d is formed with a step for refracting the light guided by the light guide unit 22b and emitting it in a predetermined external direction. The second emitting unit 22e is provided in the vicinity of the reflecting unit 22c, and emits a part of the light reflected by the reflecting unit 22c to the outside.
　本実施形態に係る車両用灯具１０においては、図７に示すように、導光体２２の第１出射部２２ｄは、投影レンズ１２の後側焦点Ｆまたはその近傍に配置される。このように、第１出射部２２ｄを投影レンズ１２の後側焦点Ｆまたはその近傍に配置することで、デイタイムランニング用ＬＥＤ１８ｃを後側焦点Ｆまたはその近傍に配置した場合と同様の効果が得られる。導光体２２は、擬似的な光源とみなすことができる。導光体２２の第１出射部２２ｄから出射された光Ｌ３が投影レンズ１２により投影されることにより、灯具前方の仮想鉛直スクリーン上に第１追加配光パターンＡＤ１が形成される。 In the vehicle lamp 10 according to the present embodiment, as shown in FIG. 7, the first exit portion 22d of the light guide body 22 is arranged at or near the rear focal point F of the projection lens 12. By arranging the first exit portion 22d at or near the rear focal point F of the projection lens 12 in this way, the same effect as when the LED 18c for daytime running is arranged at or near the rear focal point F can be obtained. Be done. The light guide body 22 can be regarded as a pseudo light source. The light L3 emitted from the first emitting portion 22d of the light guide body 22 is projected by the projection lens 12, so that the first additional light distribution pattern AD1 is formed on the virtual vertical screen in front of the lamp.
　また、本実施形態に係る車両用灯具１０においては、図７に示すように、導光体２２の第２出射部２２ｅから出射された光Ｌ４は、ロービーム用ＬＥＤ１８ａおよびハイビーム用ＬＥＤ１８ｂを挟んで導光体２２と反対側に位置するリフレクタ２０により反射される。そして、導光体２２の第２出射部２２ｅから出射された光Ｌ４が投影レンズ１２により投影されることにより、灯具前方の仮想鉛直スクリーン上に第２追加配光パターンＡＤ２が形成される。 Further, in the vehicle lamp 10 according to the present embodiment, as shown in FIG. 7, the light L4 emitted from the second exit portion 22e of the light guide body 22 is guided by sandwiching the low beam LED 18a and the high beam LED 18b. It is reflected by the reflector 20 located on the opposite side of the light body 22. Then, the light L4 emitted from the second exit portion 22e of the light guide body 22 is projected by the projection lens 12, so that the second additional light distribution pattern AD2 is formed on the virtual vertical screen in front of the lamp.
　ロービーム用ＬＥＤ１８ａのアレイと、ハイビーム用ＬＥＤ１８ｂのアレイと、デイタイムランニング用ＬＥＤ１８ｃとを同時点灯することで、図８に示すように、ロービーム用配光パターンＬｏ、ハイビーム用配光パターンＨｉ、第１追加配光パターンＡＤ１および第２追加配光パターンＡＤ２が合成され、デイタイムランニング用配光パターンＤＲを形成することができる。このように、本実施形態に係る車両用灯具１０では、導光体２２を用いることにより、投影レンズ１２の後側焦点Ｆの周辺にデイタイムランニング用ＬＥＤ１８ｃを配置することができない場合でも、所望の配光パターンを形成することができる。 By simultaneously lighting the array of low beam LEDs 18a, the array of high beam LEDs 18b, and the daytime running LED 18c, as shown in FIG. 8, the low beam light distribution pattern Lo, the high beam light distribution pattern Hi, and the first The additional light distribution pattern AD1 and the second additional light distribution pattern AD2 can be combined to form the daytime running light distribution pattern DR. As described above, in the vehicle lamp 10 according to the present embodiment, even if the daytime running LED 18c cannot be arranged around the rear focal point F of the projection lens 12 by using the light guide body 22, it is desired. Light distribution pattern can be formed.
　図７に戻るが、遮光カバー３２は、導光体２２の一部（入射部２２ａ、反射部２２ｃおよび第２出射部２２ｅ）を覆うように配置されている。遮光カバー３２は、遮光カバー３２からの漏れ光を遮光する。これにより、投影レンズ１２に入射してグレアを生じるのを防ぐことができる。また、遮光カバー３２は、投影レンズ１２によって集光された太陽光を遮光する。これにより、導光体２２が太陽光により過度に集光され、変形等の不具合を生じるのを防ぐことができる。太陽光の遮光を好適に行うために、遮光カバー３２は、金属製であることが望ましい。 Returning to FIG. 7, the light-shielding cover 32 is arranged so as to cover a part of the light guide body 22 (incident portion 22a, reflection portion 22c, and second exit portion 22e). The light-shielding cover 32 blocks the light leaking from the light-shielding cover 32. As a result, it is possible to prevent glare from being incident on the projection lens 12. Further, the light-shielding cover 32 blocks the sunlight collected by the projection lens 12. As a result, it is possible to prevent the light guide body 22 from being excessively focused by sunlight and causing problems such as deformation. It is desirable that the light-shielding cover 32 is made of metal in order to preferably block sunlight.
　例えば上述の特許文献１では、ＬＥＤを光源としてリフレクタやレンズを組み合わせた集光型や拡散型の複数の灯具ユニットで車両用前照灯を構成し、これらの灯具ユニットの全部または選択した一部を点灯し、点灯した灯具ユニットから出射した光を合成して所望の配光パターンを得ている。特に、集光性の高い灯具ユニットを点灯することでハイビーム用配光パターンを得ており、拡散性の高いランプユニットを点灯することでロービーム用配光パターンを得ている。 For example, in Patent Document 1 described above, a vehicle headlight is composed of a plurality of condensing type or diffusing type lamp units in which an LED is used as a light source and a reflector and a lens are combined, and all or a selected part of these lamp units. Is lit, and the light emitted from the lit lamp unit is combined to obtain a desired light distribution pattern. In particular, a light distribution pattern for a high beam is obtained by lighting a lamp unit having a high light-collecting property, and a light distribution pattern for a low beam is obtained by lighting a lamp unit having a high diffusivity.
　近年ではこれらハイビーム用配光パターンとロービーム用配光パターンの２つの配光パターンに加えて、自動車の走行状態に適合させた配光パターンが提案されている。例えば、昼間走行時に自車の存在を他車に確認させるためのデイタイムランニング用配光パターン等がある。 In recent years, in addition to these two light distribution patterns, a high beam light distribution pattern and a low beam light distribution pattern, a light distribution pattern adapted to the driving condition of an automobile has been proposed. For example, there is a light distribution pattern for daytime running for letting another vehicle confirm the existence of the own vehicle during daytime running.
　このような種々の配光パターンに対処するために、車両用前照灯を構成している複数の灯具ユニットをそれぞれ異なる配光特性の灯具ユニットとして構成した上で、これら灯具ユニットを組み合わせて配光パターンを形成することが行われている。そのため、例えばハイビーム用配光パターンやロービーム用配光パターンに加えて、デイタイムランニング用配光パターンを実現するためには、異なる配光特性の灯具ユニットを追加する必要があり、灯具ユニットの数が増えるため、車両用前照灯が大型化、高コストなものになるという課題がある。 In order to deal with such various light distribution patterns, a plurality of lamp units constituting the vehicle headlights are configured as lamp units having different light distribution characteristics, and these lamp units are combined and arranged. Forming a light pattern is being performed. Therefore, for example, in order to realize the light distribution pattern for daytime running in addition to the light distribution pattern for high beam and the light distribution pattern for low beam, it is necessary to add lamp units having different light distribution characteristics, and the number of lamp units Therefore, there is a problem that the headlights for vehicles become large and expensive.
　従って、少ない構成要素を用いて複数の配光パターンを形成することのできる車両用灯具を提供することが望ましい。 Therefore, it is desirable to provide a vehicle lamp that can form a plurality of light distribution patterns using a small number of components.
　本実施形態に係る車両用灯具１０では、同一の基板１６上にロービーム用ＬＥＤ１８ａのアレイ、ハイビーム用ＬＥＤ１８ｂのアレイ、およびデイタイムランニング用ＬＥＤ１８ｃが実装されている。また、ロービーム用ＬＥＤ１８ａのアレイ、ハイビーム用ＬＥＤ１８ｂのアレイ、およびデイタイムランニング用ＬＥＤ１８ｃから出射される光は、同一の投影レンズ１２を介して灯具前方に照射される。複数の灯具ユニットを用いる場合と比較して少ない構成要素で、ハイビーム用配光パターンＨｉ、ロービーム用配光パターンＬｏ、およびデイタイムランニング用配光パターンＤＲの三種類の配光パターンを形成することができる。これにより、複数の灯具ユニットを用いる場合と比較して、車両用灯具の小型化や低コスト化を図ることができる。 In the vehicle lamp 10 according to the present embodiment, an array of low beam LEDs 18a, an array of high beam LEDs 18b, and a daytime running LED 18c are mounted on the same substrate 16. Further, the light emitted from the array of low beam LEDs 18a, the array of high beam LEDs 18b, and the daytime running LED 18c is irradiated to the front of the lamp through the same projection lens 12. Forming three types of light distribution patterns: high beam light distribution pattern Hi, low beam light distribution pattern Lo, and daytime running light distribution pattern DR with fewer components than when a plurality of lamp units are used. Can be done. As a result, it is possible to reduce the size and cost of the vehicle lamp as compared with the case where a plurality of lamp units are used.
　以上、実施の形態をもとに本発明を説明した。これらの実施形態は例示であり、各構成要素や各処理プロセスの組合せにいろいろな変形例が可能なこと、またそうした変形例も本発明の範囲にあることは当業者に理解されるところである。 The present invention has been described above based on the embodiments. These embodiments are examples, and it will be understood by those skilled in the art that various modifications are possible for each component and combination of each processing process, and that such modifications are also within the scope of the present invention.
　例えば、上述の実施形態では、発光素子としてＬＥＤを例示したが、発光素子はＬＥＤに限定されず、例えば半導体レーザが用いられてもよい。 For example, in the above-described embodiment, the LED is exemplified as the light emitting element, but the light emitting element is not limited to the LED, and for example, a semiconductor laser may be used.
　本発明は、車両用灯具に利用できる。 The present invention can be used for vehicle lamps.
　１０　車両用灯具、　１２　投影レンズ、　１４　レンズホルダ、　１６　基板、　１８　ＬＥＤ、　１９　コネクタ、　２０　リフレクタ、　２２　導光体、　２４　ヒートシンク、　２６　ファン、　３０　ビームシェーパ、　３２　遮光カバー。 10 vehicle lamps, 12 projection lenses, 14 lens holders, 16 boards, 18 LEDs, 19 connectors, 20 reflectors, 22 light guides, 24 heat sinks, 26 fans, 30 beam shapers, 32 shading covers.

Claims (11)

  1. 　投影レンズと、
    　前記投影レンズの焦点またはその近傍に配置された第１発光素子と、
    　第２発光素子と、
    　前記第２発光素子からの光を入射する入射部と、入射した光を導光する導光部と、導光された光を出射する出射部とを有する導光体と、
    　を備え、
    　前記導光体の前記出射部は、前記投影レンズの焦点またはその近傍に配置されることを特徴とする車両用灯具。     With a projection lens
    A first light emitting element arranged at or near the focal point of the projection lens,
    With the second light emitting element
    A light guide body having an incident portion that incidents light from the second light emitting element, a light guide portion that guides the incident light, and an exit portion that emits the guided light.
    With
    A vehicle lighting device characterized in that the emitting portion of the light guide body is arranged at or near the focal point of the projection lens.
  2. 　前記第１発光素子と前記第２発光素子は、同一の基板上に配置されることを特徴とする請求項１に記載の車両用灯具。 The vehicle lamp according to claim 1, wherein the first light emitting element and the second light emitting element are arranged on the same substrate.
  3. 　前記導光体は、入射した光を出射する第２の出射部を有し、
    　前記第２の出射部から出射された光を前記投影レンズに向けて反射するリフレクタをさらに備えることを特徴とする請求項１または２に記載の車両用灯具。     The light guide has a second emitting portion that emits incident light.
    The vehicle lamp according to claim 1 or 2, further comprising a reflector that reflects the light emitted from the second emitting portion toward the projection lens.
  4. 　前記第１発光素子は、ロービーム用の発光素子と、ハイビーム用の発光素子とを含み、
    　前記第２発光素子は、デイタイムランニング用の発光素子を含むことを特徴とする請求項３に記載の車両用灯具。     The first light emitting element includes a light emitting element for a low beam and a light emitting element for a high beam.
    The vehicle lighting device according to claim 3, wherein the second light emitting element includes a light emitting element for daytime running.
  5. 　前記導光体の前記出射部から出射された光は、ロービーム用配光パターンおよびハイビーム用配光パターンよりも上方の領域に向けて照射され、
    　前記導光体の前記第２の出射部から出射された光は、前記ロービーム用配光パターンの略中央領域に向けて照射されることを特徴とする請求項４に記載の車両用灯具。     The light emitted from the emitting portion of the light guide body is irradiated toward a region above the low beam light distribution pattern and the high beam light distribution pattern.
    The vehicle lamp according to claim 4, wherein the light emitted from the second emitting portion of the light guide body is emitted toward a substantially central region of the low beam light distribution pattern.
  6. 　基板と、
    　第１配光パターン用の第１発光素子のアレイと、
    　前記第１配光パターンよりも自車手前側を照射する第２配光パターン用の第２発光素子のアレイと、
    　追加配光パターン用の第３発光素子と、
    　投影レンズと、
    　を備え、
    　前記第１発光素子のアレイ、前記第２発光素子のアレイおよび前記第３発光素子は、同一の前記基板上に実装され、
    　前記第１発光素子のアレイ、前記第２発光素子のアレイおよび前記第３発光素子から出射される光は、同一の前記投影レンズを介して灯具前方に照射され、
    　前記第１発光素子のアレイと、前記第２発光素子のアレイと、前記第３発光素子とを同時点灯することで、前記第１配光パターンおよび前記第２配光パターンよりも広く且つ光度が低い第３配光パターンが形成されることを特徴とする車両用灯具。     With the board
    An array of first light emitting elements for the first light distribution pattern,
    An array of second light emitting elements for the second light distribution pattern that illuminates the front side of the vehicle from the first light distribution pattern.
    The third light emitting element for the additional light distribution pattern and
    With a projection lens
    With
    The array of the first light emitting element, the array of the second light emitting element, and the third light emitting element are mounted on the same substrate.
    The light emitted from the array of the first light emitting element, the array of the second light emitting element, and the third light emitting element is irradiated to the front of the lamp through the same projection lens.
    By simultaneously lighting the array of the first light emitting element, the array of the second light emitting element, and the third light emitting element, the light distribution pattern is wider and the light intensity is wider than that of the first light distribution pattern and the second light distribution pattern. A vehicle lighting fixture characterized in that a low third light distribution pattern is formed.
  7. 　前記基板は、前記投影レンズの光軸に垂直な平面に対して傾斜して配置されることを特徴とする請求項６に記載の車両用灯具。 The vehicle lamp according to claim 6, wherein the substrate is arranged at an angle with respect to a plane perpendicular to the optical axis of the projection lens.
  8. 　前記第３発光素子からの光を入射する入射部と、入射した光を導光する導光部と、導光された光を出射する出射部とを有する導光体と、をさらに備え、
    　前記導光体の前記出射部は、前記投影レンズの焦点またはその近傍に配置されることを特徴とする請求項６または７に記載の車両用灯具。     Further, an incident portion for incident light from the third light emitting element, a light guide portion for guiding the incident light, and a light guide body having an exit portion for emitting the guided light are further provided.
    The vehicle lamp according to claim 6 or 7, wherein the exit portion of the light guide body is arranged at or near the focal point of the projection lens.
  9. 　前記第１発光素子のアレイおよび前記第２発光素子のアレイは、前記投影レンズの焦点またはその近傍に配置され、
    　前記第１発光素子のアレイは、前記基板に形成された配線パターンを介して個別に点消灯可能に構成され、
    　前記第３発光素子は、前記配線パターンを挟んで前記第１発光素子から離隔して配置されることを特徴とする請求項８に記載の車両用灯具。     The array of the first light emitting element and the array of the second light emitting element are arranged at or near the focal point of the projection lens.
    The array of the first light emitting elements is configured so as to be individually turned on and off via a wiring pattern formed on the substrate.
    The vehicle lamp according to claim 8, wherein the third light emitting element is arranged apart from the first light emitting element with the wiring pattern interposed therebetween.
  10. 　前記導光体を覆うように配置された遮光カバーをさらに備えることを特徴とする請求項８または９に記載の車両用灯具。 The vehicle lighting device according to claim 8 or 9, further comprising a light-shielding cover arranged so as to cover the light guide body.
  11. 　前記遮光カバーは、金属製であることを特徴とする請求項１０に記載の車両用灯具。 The vehicle lamp according to claim 10, wherein the light-shielding cover is made of metal.
PCT/JP2020/030271 2019-08-08 2020-08-06 Vehicle lamp WO2021025136A1 (en)

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