CN111867886B - Vehicle lamp and vehicle lamp system - Google Patents

Vehicle lamp and vehicle lamp system Download PDF

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Publication number
CN111867886B
CN111867886B CN201980016611.6A CN201980016611A CN111867886B CN 111867886 B CN111867886 B CN 111867886B CN 201980016611 A CN201980016611 A CN 201980016611A CN 111867886 B CN111867886 B CN 111867886B
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CN
China
Prior art keywords
light source
light
lamp
vehicle
road surface
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201980016611.6A
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Chinese (zh)
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CN111867886A (en
Inventor
佐藤隆芳
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Koito Manufacturing Co Ltd
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Koito Manufacturing Co Ltd
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Publication date
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Publication of CN111867886A publication Critical patent/CN111867886A/en
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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21SNON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/16Laser light sources
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60QARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q1/00Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60QARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q1/00Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor
    • B60Q1/26Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to indicate the vehicle, or parts thereof, or to give signals, to other traffic
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21SNON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/12Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of emitted light
    • F21S41/13Ultraviolet light; Infrared light
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21SNON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/141Light emitting diodes [LED]
    • F21S41/147Light emitting diodes [LED] the main emission direction of the LED being angled to the optical axis of the illuminating device
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21SNON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/141Light emitting diodes [LED]
    • F21S41/147Light emitting diodes [LED] the main emission direction of the LED being angled to the optical axis of the illuminating device
    • F21S41/148Light 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
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21SNON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/162Incandescent light sources, e.g. filament or halogen lamps
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21SNON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/17Discharge light sources
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21SNON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/176Light sources where the light is generated by photoluminescent material spaced from a primary light generating element
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21SNON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/20Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/25Projection lenses
    • F21S41/255Lenses with a front view of circular or truncated circular outline
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21SNON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/20Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/25Projection lenses
    • F21S41/275Lens surfaces, e.g. coatings or surface structures
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21SNON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S45/00Arrangements within vehicle lighting devices specially adapted for vehicle exteriors, for purposes other than emission or distribution of light
    • F21S45/40Cooling of lighting devices
    • F21S45/42Forced cooling
    • F21S45/43Forced cooling using gas
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21SNON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S45/00Arrangements within vehicle lighting devices specially adapted for vehicle exteriors, for purposes other than emission or distribution of light
    • F21S45/40Cooling of lighting devices
    • F21S45/47Passive cooling, e.g. using fins, thermal conductive elements or openings
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50Cooling arrangements
    • F21V29/502Cooling arrangements characterised by the adaptation for cooling of specific components
    • F21V29/503Cooling arrangements characterised by the adaptation for cooling of specific components of light sources
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V29/00Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50Cooling arrangements
    • F21V29/70Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
    • F21V29/74Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades
    • F21V29/76Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades with essentially identical parallel planar fins or blades, e.g. with comb-like cross-section

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

Abstract

The vehicle lamp includes: a 1 st light source (102) for forming a road surface drawing pattern; an optical element (112) that controls the traveling direction of the light of the 1 st light source to form a road surface drawing pattern; a 2 nd light source (104) for forming a light distribution pattern for a driver to observe the front; and a projection lens (110) that projects light from the 1 st light source (102) and the 2 nd light source (104) to the front of the lamp.

Description

Vehicle lamp and vehicle lamp system
Technical Field
The present invention relates to a vehicle lamp and a vehicle lamp system, and more particularly to a vehicle lamp used for a vehicle such as an automobile, and a vehicle lamp system using the vehicle lamp.
Background
Conventionally, there is known a vehicle lamp capable of drawing a predetermined drawing pattern on a road surface for reminding a pedestrian or a driver of another vehicle (for example, refer to patent document 1). In the vehicle lamp disclosed in patent document 1, a lamp unit for road surface drawing and a lamp unit for forming a light distribution pattern for a driver to observe in front are housed in a lamp room formed by a lamp body and a front cover.
[ Prior Art literature ]
[ patent literature ]
Patent document 1 Japanese patent laid-open No. 2008-094127
Disclosure of Invention
[ problem to be solved by the invention ]
There is always a demand for simplifying the structure of a vehicle lamp. The present inventors have intensively studied and as a result, have obtained a new lamp structure capable of simplifying the structure of a vehicle lamp capable of forming a road surface drawing pattern and observing a light distribution pattern for the front.
The present invention has been made in view of such a situation, and an object thereof is to provide a technique for simplifying a structure of a vehicle lamp capable of forming a road surface drawing pattern and observing a light distribution pattern for the front.
[ solution for solving the technical problem ]
In order to solve the above-described problems, one aspect of the present invention is a vehicle lamp. The vehicle lamp includes: a 1 st light source for forming a road surface drawing pattern; an optical element that controls a traveling direction of light of the 1 st light source to form a road surface drawing pattern; a 2 nd light source for forming a light distribution pattern for a driver to observe the front; and a projection lens for projecting the light of the 1 st light source and the 2 nd light source to the front of the lamp. According to this aspect, the structure of the vehicle lamp can be simplified.
Another aspect of the present invention is a vehicle lamp. The vehicle lamp includes: a 1 st light source for forming a road surface drawing pattern; an optical element that controls a traveling direction of light of the 1 st light source to form a road surface drawing pattern; a 2 nd light source for forming a light distribution pattern for a driver to observe the front; and a 1 st heat sink supporting the 1 st light source and the 2 nd light source. According to this aspect, the structure of the vehicle lamp can be simplified.
In the above aspect, the light source device may further include a 2 nd fin connected to the 1 st light source, wherein the 1 st fin has a plurality of 1 st fins, the 2 nd fin has a plurality of 2 nd fins, and the 1 st fins and the 2 nd fins are arranged in parallel. In the above embodiment, the 1 st heat sink may have a base portion having a 1 st surface on which the 2 nd light source is mounted and a 2 nd surface which faces the opposite side of the 1 st surface and connects the 1 st fins, and the 1 st light source may be arranged between the 1 st fins so that the light emitting direction is directed to the 2 nd surface side. In the above aspect, the optical element may be provided to the projection lens. In any of the above aspects, the 2 nd light source may include a plurality of light sources, each of the light sources may be assigned to a plurality of individual regions arranged in front of the host vehicle, and the light may be irradiated to the corresponding individual region. In the above aspect, the 2 nd light source may further include a low beam light source for forming a low beam light distribution pattern having a predetermined cutoff line, and the plurality of light sources may be configured to emit light to a plurality of individual regions arranged above the cutoff line in the vehicle width direction.
Another aspect of the present invention is a lamp system for a vehicle. The vehicle lamp system includes an imaging device that images the front of the vehicle, the vehicle lamp according to any one of the above aspects, and a control device that adjusts the optical axis of the vehicle lamp. The control device adjusts the optical axis based on the position of the road surface drawing pattern included in the image data acquired from the imaging device.
Any combination of the above components and the result of converting the expression system of the present invention between methods, apparatuses, systems, and the like are also effective as the means of the present invention.
[ Effect of the invention ]
According to the present invention, a technique for simplifying the structure of a vehicle lamp capable of forming a road surface drawing pattern and a light distribution pattern for viewing the front can be provided.
Drawings
Fig. 1 is a diagram showing a schematic configuration of a vehicle lamp system according to an embodiment.
Fig. 2 is a vertical cross-sectional view of a lamp unit included in the vehicle lamp according to the embodiment.
Fig. 3 is a front view of the lamp unit.
Fig. 4 is an enlarged cross-sectional view of a region containing the 1 st light source.
Fig. 5 is a diagram schematically showing a light distribution pattern formed by the vehicle lamp of the embodiment.
Detailed Description
The present invention will be described below based on preferred embodiments with reference to the accompanying drawings. The embodiments are not intended to limit the invention, but are merely examples, and not all the features or combinations of the features described in the embodiments are essential to the invention. The same or equivalent components, members, and processes shown in the drawings are denoted by the same reference numerals, and repetitive description thereof will be omitted as appropriate. In addition, the scale or shape of the parts shown in the drawings are set cheaply for ease of illustration and are not to be construed restrictively unless specifically mentioned. In the present specification and claims, unless otherwise specified, terms such as "1 st", "2 nd" and the like are used to distinguish one component from another, the terms do not denote any order or importance.
Fig. 1 is a diagram showing a schematic configuration of a vehicle lamp system according to an embodiment. In fig. 1, some of the components of the vehicle lamp system 1 are depicted as functional blocks. These functional blocks are implemented as hardware by elements or circuits represented by a CPU or a memory of a computer, and are implemented as software by a computer program or the like. Those skilled in the art will appreciate that these functional blocks can be implemented in various forms by combinations of hardware and software.
The vehicle lamp system 1 is applied to a vehicle headlamp apparatus having a pair of left and right headlamp units disposed in front of a vehicle. Since the pair of headlight units have a substantially laterally symmetrical structure, fig. 1 shows only one headlight unit as the vehicle lamp 2.
The vehicle lamp system 1 includes a vehicle lamp 2, an imaging device 10, and a control device 12 as main components. The vehicle lamp 2 includes: a lamp body 4 having an opening on a vehicle front side; and a translucent cover 6 that is attached so as to cover the opening of the lamp body 4. The vehicle lamp 2 includes an actuator 14 and a lamp unit 100 in a lamp chamber 8 formed by the lamp body 4 and the translucent cover 6. In the present embodiment, the imaging device 10 and the control device 12 are also housed in the lamp room 8.
(imaging device)
The imaging device 10 is a device that images the front of the host vehicle. The imaging device 10 is constituted by a conventionally known camera, for example. The image data acquired by the imaging device 10 is transmitted to the control device 12.
(control device)
The control device 12 adjusts the optical axis of the vehicle lamp 2. Specifically, the control device 12 adjusts the optical axis O of the lamp unit 100 based on the position of the road surface drawing pattern included in the image data acquired from the imaging device 10. The road surface drawing pattern will be described in detail later. The control device 12 of the present embodiment also determines the light distribution pattern formed by the vehicle lamp 2. Further, the adjustment of the optical axis of the vehicle lamp 2 and the determination of the light distribution pattern may be performed by different control devices.
The control device 12 includes an image analysis unit 16, an optical axis displacement amount determination unit 18, an actuator control unit 20, a light distribution pattern determination unit 22, and a light source control unit 24. The image analysis unit 16 detects a road surface drawing pattern to be formed by the lamp unit 100 from the image data acquired from the imaging device 10. The image analysis unit 16 transmits the position information of the road surface drawing pattern to the optical axis displacement amount determination unit 18.
The image analysis unit 16 detects a vehicle existing in front of the host vehicle from the image data acquired from the self-imaging device 10. The image analysis unit 16 can detect the preceding vehicle by a conventionally known method including algorithm recognition (deep learning). For example, the image analysis unit 16 holds feature points representing the preceding vehicle in advance. Then, the image analysis unit 16 recognizes the position of the preceding vehicle when the feature point exists in the image data. The "feature point" mentioned above refers to, for example, a light spot that appears in an estimated presence area of a head lamp of an oncoming vehicle or a tail lamp of a preceding vehicle at or above a predetermined illuminance. The position information of the preceding vehicle is sent to the light distribution pattern determination section 22.
The optical axis displacement amount determining unit 18 detects a displacement amount between the initial position and the actual position, which is determined in advance, with respect to the optical axis of the lamp unit 100, using the position information of the road surface drawing pattern acquired from the image analyzing unit 16. Then, the amount of displacement of the lamp unit required to bring the actual optical axis position into agreement with the initial optical axis position is determined from the detected amount of displacement.
For example, the optical axis displacement amount determining section 18 holds ideal pattern position information in advance. The ideal pattern position is a position where the road surface drawing pattern is taken in the image data when the lamp unit 100 takes the initial optical axis position. Then, the optical axis displacement amount determining unit 18 detects the pattern position in the acquired image data, that is, the amount of displacement between the actual pattern position and the ideal pattern position. Then, the shift amount between the optical axis position and the initial optical axis position is detected based on the shift amount of the pattern position. The optical axis displacement amount determining section 18 sends information about the amount of displacement of the optical axis position to the actuator control section 20.
The actuator control unit 20 determines the driving amount of the actuator 14 based on the shift amount of the optical axis position acquired from the optical axis shift amount determination unit 18. For example, the actuator control unit 20 holds a conversion table in which the shift amount of the optical axis position corresponds to the driving amount of the actuator 14, and determines the driving amount of the actuator 14 using the conversion table. Then, the actuator control section 20 transmits a drive signal to the actuator 14 based on the determined drive amount.
The light distribution pattern determination unit 22 determines a light distribution pattern formed by the lamp unit 100 based on the position information of the front vehicle acquired from the image analysis unit 16. The light distribution pattern specified by the light distribution pattern specifying unit 22 has a light shielding portion or a dimming portion overlapping with the existing position of the preceding vehicle. The light distribution pattern determining section 22 transmits a signal indicating the determined light distribution pattern to the light source control section 24.
The light source control unit 24 controls the lighting state of the light source included in the lamp unit 100 based on the shape of the light distribution pattern determined by the light distribution pattern determining unit 22. The light source control unit 24 controls the light source to be turned on/off, and also the intensity of the emitted light. As a result, a light distribution pattern having a light shielding portion or a dimming portion in the existing region of the vehicle ahead is formed in front of the lamp. The image analysis unit 16 may detect a pedestrian or a road sign, and a light shielding unit or a light reducing unit may be formed in the pedestrian or the road sign.
(actuator)
The actuator 14 is a device for changing the posture of the lamp unit 100. For example, the actuator 14 is constituted by a stepping motor or the like, and a motor shaft is coupled to the lamp unit 100. When the actuator 14 is driven based on the drive signal sent from the actuator control section 20, the posture of the lamp unit 100 changes. Thereby, the optical axis position of the lamp unit 100 is adjusted. The actuator 14 can take a well known configuration.
(Lamp Unit)
The lamp unit 100 is a device that irradiates light to the front of the host vehicle to form a predetermined light distribution pattern. The lamp unit 100 is supported by the lamp body 4 via a known swinging mechanism. Thereby, the lamp unit 100 can change the posture according to the driving of the actuator 14.
Fig. 2 is a vertical cross-sectional view of a lamp unit included in the vehicle lamp according to the embodiment. Fig. 3 is a front view of the lamp unit. Fig. 4 is an enlarged cross-sectional view of a region containing the 1 st light source. In fig. 3, the projection lens is shown removed. The lamp unit 100 includes, as main components, a 1 st light source 102, a 2 nd light source 104, a 1 st heat sink 106, a 2 nd heat sink 108, a projection lens 110, and an optical element 112.
The 1 st light source 102 is a light source for forming a road surface drawing pattern. The 1 st light source 102 of the present embodiment is constituted by a laser light source. The 1 st light source 102 has a base 114, an LD (Laser diode) 116, a collimator lens 118, and a 1 st lens holder 120.
The base 114 is secured to the 2 nd heat sink 108. The LD116 is mounted on the base 114. The collimator lens 118 is configured to intersect the optical axis of the LD 116. The laser light emitted from the LD116 is converted into parallel light by the collimator lens 118. The 1 st lens holder 120 is fixed to the base 114 while holding the collimator lens 118 on the optical axis of the LD 116. The 1 st light source 102 is preferably a laser light source, but may be formed of other semiconductor light emitting elements such as an LED (Light emitting diode: light emitting diode) or EL (Electroluminescence).
The 2 nd light source 104 is a light source for forming a light distribution pattern for the driver to observe the front. The 2 nd light source 104 may be constituted by a semiconductor light emitting element such as LED, LD, EL, for example. The 2 nd light source 104 may be a light bulb, an incandescent lamp (halogen lamp), a discharge lamp (discharge lamp), or the like. The 2 nd light source 104 includes a low beam light source 104a and a plurality of high beam light sources 104b.
The 1 st heat sink 106 is a member that supports the 1 st light source 102 and the 2 nd light source 104. The 1 st heat sink 106 is made of a material having high thermal conductivity such as aluminum. The 1 st fin 106 includes a base portion 122 and a plurality of 1 st fins 124. The base portion 122 has: a 1 st surface 126 on which the 2 nd light source 104 is mounted; and a 2 nd surface 128 facing the opposite side of the 1 st surface 126.
In surface 1, 126, comprises: a parallel surface 126a extending parallel to the optical axis O of the lamp unit 100; and an inclined surface 126b extending obliquely downward from an end portion of the parallel surface 126a on the lamp front side. The low beam light source 104a is mounted on the parallel surface 126 a. In the low-beam light source 104a, the light emitting surface faces upward in the vertical direction in a state of being placed on the parallel surface 126 a. A plurality of high beam light sources 104b are mounted on the inclined surface 126 b. In the present embodiment, the plurality of high beam light sources 104b are mounted on the end region of the inclined surface 126b on the parallel surface 126a side. The plurality of high beam light sources 104b are arranged in the vehicle width direction. The light emitting surface of each high beam light source 104b faces the projection lens 110 in a state of being placed on the inclined surface 126 b.
At the 2 nd surface 128, a plurality of 1 st fins 124 are attached. The 1 st fins 124 protrude from the 2 nd surface 128 in a direction opposite to the light exit direction of the low beam light source 104a.
The 2 nd heat sink 108 is connected to the 1 st light source 102. The 2 nd heat sink 108 is made of a material having high thermal conductivity such as aluminum. The 2 nd fin 108 has a base portion 130 and a plurality of 2 nd fins 132. One surface of the base portion 130 abuts against the base 114. A plurality of 2 nd fins 132 are connected to a surface opposite to the one surface of the base portion 130.
The 1 st light source 102 and the 2 nd heat sink 108 are disposed in the extension regions of the 1 st fins 124. More specifically, the 1 st light source 102 and the 2 nd heat sink 108 are arranged between 2 1 st fins. The 1 st light source 102 is fixed to the 1 st heat sink 106. In this state, the 1 st fin 124 and the 2 nd fin 132 are arranged in parallel. In the present embodiment, the 1 st lens holder 120 of the 1 st light source 102 is fitted to the 1 st heat sink 106, but the present invention is not limited to this structure. For example, the 2 nd fin 108 may be fitted to the 1 st fin 106. In this case, the 1 st light source 102 is supported by the 1 st heat sink 106 via the 2 nd heat sink 108.
The 1 st light source 102 is disposed between the 1 st fins 124 so that the light emission direction is directed toward the 2 nd surface 128 side. In the present embodiment, the light emitting surface of the 1 st light source 102 faces the same direction as the light emitting surface of the low beam light source 104a.
A 1 st reflector 134 is disposed between the 1 st light source 102 and the base portion 122. The 1 st reflector 134 reflects light emitted from the 1 st light source 102 toward the front of the lamp. The 1 st heat sink 106 has a through hole 136 on the lamp front side of the 1 st reflector 134. The through holes 136 extend through the base portion 122 and the plurality of 1 st fins 124 in the front-rear direction of the lamp. The laser light reflected by the 1 st reflector 134 travels toward the lamp front side in the through hole 136.
A 2 nd reflector 138 is disposed vertically above the base portion 122. The 2 nd reflector 138 is fixed to the base portion 122 so as to cover the upper side of the low beam light source 104a. The 2 nd reflector 138 has a reflection surface 140 having a shape based on a rotational ellipsoid. The reflecting surface 140 has a 1 st focal point and a 2 nd focal point located on the front side of the lamp from the 1 st focal point. The positional relationship between the 2 nd reflector 138 and the low-beam light source 104a is determined as: the light exit surface of the low beam light source 104a substantially coincides with the 1 st focal point of the reflecting surface 140. Further, the positional relationship of the 2 nd reflector 138 and the base portion 122 is determined as: the 2 nd focal point is located near the boundary between the parallel surface 126a and the inclined surface 126b of the base portion 122.
A shield (edge) portion 142 is provided at the boundary between the parallel surface 126a and the inclined surface 126 b. The shielding portion 142 selectively shields a part of the light emitted from the low-beam light source 104a. The shielding portion 142 has a ridge 142a having a shape corresponding to a cutoff line of a light distribution pattern to be described later. The positional relationship between the shielding portion 142 and the 2 nd reflector 138 is determined such that the ridge 142a is located in the vicinity of the 2 nd focus of the reflecting surface 140, and the shielding portion 142 is fixed to the base portion 122.
The heat generated in the low beam light source 104a and the high beam light sources 104b is diffused to the 1 st fins 124 via the base portion 122 of the 1 st fin 106. Further, the heat generated in the 1 st light source 102 is mainly diffused to the 2 nd fin 132 via the base portion 130 of the 2 nd heat sink 108. A portion of the heat of the 1 st light source 102 also diffuses into the 1 st fin 124. A cooling fan 146 is disposed below the 1 st fins 124 and the 2 nd fins 132. The cooling fan 146 supplies air to the 1 st fins 124 and the 2 nd fins 132. Thereby, the diffusion of the heat transferred to the 1 st fins 124 and the 2 nd fins 132 is promoted.
A frame-shaped 2 nd lens holder 144 is fixed to the front side of the base 122. The 2 nd lens holder 144 holds the peripheral edge portion of the projection lens 110 and supports the projection lens 110. The projection lens 110 is an optical member that projects a light distribution pattern in front of the lamp. The projection lens 110 is constituted by, for example, a free-form surface lens having a free-form surface shape on the front side surface and the rear side surface. The projection lens 110 projects the light source image formed on the rear focal plane as an inverted image onto a virtual vertical screen in front of the lamp. The projection lens 110 is disposed on the optical axis O on the lamp front side of the base portion 122. The projection lens 110 is disposed at a position where the rear focal point thereof substantially coincides with the 2 nd focal point of the reflection surface 140.
The optical element 112 is a member that controls the traveling direction of the light of the 1 st light source 102 to form a road surface drawing pattern. The optical element 112 is constituted by, for example, a diffraction grating (also called a diffractive optical element (diffractive optical element: DOE)). In the present embodiment, the optical element 112 is configured by a transmissive diffraction grating, and is provided in the projection lens 110. Specifically, the optical element 112 is provided in the rear side surface of the projection lens 110 in a region overlapping with the 1 st reflector 134 as viewed in the lamp front-rear direction. The projection lens 110 is integrally formed with the optical element 112.
Light emitted from the low-beam light source 104a is reflected by the reflecting surface 140, passes through the vicinity of the ridge line 142a, and enters the projection lens 110. The light of the low beam light source 104a entering the projection lens 110 is irradiated to the front of the lamp as substantially parallel light. A part of the light of the low-beam light source 104a is selectively blocked by the ridge line 142a as a boundary.
At least a part of the light emitted from each of the plurality of high beam light sources 104b is directly incident on the projection lens 110. A part of the light emitted from the high beam light source 104b may be reflected by the 1 st sub-reflector 148a disposed on the upper side of the high beam light source 104b and/or the 2 nd sub-reflector 148b disposed on the lower side of the high beam light source 104b, and then incident on the projection lens 110. The light of each high beam light source 104b incident on the projection lens 110 is irradiated to the front of the lamp as substantially parallel light. The light emitted from the 1 st light source 102 is reflected by the 1 st reflector 134, transmitted through the optical element 112, and enters the projection lens 110. The light of the 1 st light source 102 entering the projection lens 110 is irradiated to the front of the lamp as substantially parallel light. Therefore, the projection lens 110 of the present embodiment projects the light of the 1 st light source 102 and the 2 nd light source 104 to the front of the lamp.
Fig. 5 is a diagram schematically showing a light distribution pattern formed by the vehicle lamp of the embodiment. Fig. 5 shows a light distribution pattern formed on a virtual vertical screen arranged at a predetermined position in front of the lamp, for example, at a position 25m in front of the lamp.
The low-beam light distribution pattern PL having a predetermined cutoff line is formed by light emitted from the low-beam light source 104a. The low beam light distribution pattern PL is a light distribution pattern for the driver to observe the front. The low beam light distribution pattern PL has an opposite lane side cutoff line CL1, a host lane side cutoff line CL2, and an inclined cutoff line CL3.
The opposite lane side cutoff line CL1 extends parallel to the horizontal line H on the opposite lane side, the host lane side cutoff line CL2 extends parallel to the horizontal line H on the host lane side at a position higher than the opposite lane side cutoff line CL1, and the inclined cutoff line CL3 connects the opposite lane side cutoff line CL1 and the host lane side cutoff line CL 2. The cutoff line of the low-beam light distribution pattern PL corresponds to the shape of the ridge line 142a.
The high beam light distribution pattern PH is formed by light emitted from the plurality of high beam light sources 104b. The high beam light distribution pattern PH is a light distribution pattern for the driver to observe the front. The high beam light distribution pattern PH is projected on all of the plurality of individual regions R arranged in the vehicle width direction above the cutoff line of the low beam light distribution pattern PL.
The light sources 104b for high beam can be individually adjusted in the lighting state. Each of the high beam light sources 104b is assigned to a plurality of individual regions R arranged in front of the host vehicle, and irradiates light to the corresponding individual region R. The individual region R and the high beam light sources 104b may be allocated one to one, or a plurality of high beam light sources 104b may be allocated to 1 individual region R. Since each high beam light source 104b irradiates light, a partial pattern PHa constituting a part of the high beam light distribution pattern PH is projected onto each corresponding individual region R.
The light source control unit 24 controls the light-on state of each high-beam light source 104b based on the shape of the light distribution pattern determined by the light distribution pattern determining unit 22. Thus, the light distribution pattern PH for high beam having the light shielding portion or the dimming portion is formed in the separate region R where the preceding vehicle exists.
Further, the traveling direction of the light emitted from the 1 st light source 102 is controlled by the optical element 112, and as a result, a road surface drawing pattern PS is formed in front of the host vehicle. The road surface drawing pattern PS has, for example, a cross shape. The shape of the road surface drawing pattern PS is not particularly limited as long as the optical axis displacement amount determining unit 18 can detect the displacement amount of the optical axis position, and may be any other shape such as a straight line extending in the horizontal direction or a straight line extending in the vertical direction. The formation position of the road surface drawing pattern PS can be arbitrarily set as long as it does not obstruct the visibility of the driver and is a position that can be photographed by the photographing device 10.
As described above, the vehicle lamp 2 according to the present embodiment includes: a 1 st light source 102 for forming a road surface drawing pattern PS; an optical element 112 that controls a traveling direction of light of the 1 st light source 102 to form a road surface drawing pattern PS; a 2 nd light source 104 for forming a light distribution pattern for a driver to observe the front; and a projection lens 110 that projects light of the 1 st light source 102 and the 2 nd light source 104 to the front of the lamp. That is, in the vehicle lamp 2 of the present embodiment, the road surface drawing pattern PS and the light distribution pattern for the front view are projected by the common projection lens 110. This can simplify the structure of the vehicle lamp 2 capable of forming the road surface drawing pattern PS and the light distribution pattern for the front view.
The vehicle lamp 2 further includes: a 1 st light source 102; an optical element 112; a 2 nd light source 104; and a 1 st heat sink 106 supporting the 1 st light source 102 and the 2 nd light source 104. That is, in the vehicle lamp 2 of the present embodiment, the 1 st light source 102 and the 2 nd light source 104 are supported by the common 1 st heat sink 106. This can simplify the structure of the vehicle lamp capable of forming the road surface drawing pattern PS and the light distribution pattern for the front observation.
That is, according to the present embodiment, the road surface drawing pattern PS and the light distribution pattern for the front view can be formed by a single lamp unit 100. This makes it possible to simplify the structure of the vehicle lamp as compared with a conventional vehicle lamp in which the road surface drawing pattern PS and the light distribution pattern for the front observation are formed by separate lamp units. In addition, the vehicle lamp can be miniaturized.
The vehicle lamp system 1 according to the present embodiment includes: an imaging device 10 that images the front of the host vehicle; a vehicle lamp 2; and a control device 12 that adjusts the optical axis O of the vehicle lamp 2. The control device 12 adjusts the optical axis O of the vehicle lamp 2 based on the position of the road surface drawing pattern PS included in the image data acquired from the imaging device 10. This enables the formation of the light distribution pattern for front observation with high positional accuracy. In addition, the structure of the vehicle lamp system 1 can be simplified.
The 2 nd light source 104 includes a plurality of high beam light sources 104b, and each high beam light source 104b is allocated to a plurality of individual regions R arranged in front of the host vehicle, and irradiates light to the corresponding individual region R. The 2 nd light source 104 includes a low beam light source 104a for forming a low beam light distribution pattern PL having a predetermined cutoff line, and the plurality of high beam light sources 104b respectively irradiate light to a plurality of individual regions R arranged above the cutoff line in the vehicle width direction.
Thus, ADB (Adaptive Driving Beam: adaptive high beam) control can be realized, which dynamically and adaptively controls the light distribution pattern of the high beam based on the state around the vehicle. In the ADB control, the presence or absence of a preceding vehicle such as a preceding vehicle or an opposite vehicle located in front of the host vehicle is detected, and a light distribution pattern having a light shielding portion or a light reducing portion is formed in a separate region R corresponding to the preceding vehicle. As a result, glare to a preceding vehicle is reduced. Further, according to the present embodiment, the position accuracy of the light distribution pattern for the front view can be improved by the road surface drawing pattern PS, and therefore the accuracy of ADB control can be improved.
The vehicle lamp 2 further includes a 2 nd heat sink 108 connected to the 1 st light source 102. Further, the 1 st fin 106 has a plurality of 1 st fins 124, and the 2 nd fin 108 has a plurality of 2 nd fins 132. The 1 st fin 124 and the 2 nd fin 132 are arranged in parallel. This makes it possible to apply the cooling structure of the 1 st fin 106 to the 2 nd fin 108. Specifically, the 1 st heat sink 106 and the 2 nd heat sink 108, in other words, the 2 nd light source 104 and the 1 st light source 102 can be cooled by the common cooling fan 146. Therefore, the structure of the vehicle lamp 2 can be further simplified.
Further, the 1 st fin 106 has a base portion 122. The base portion 122 has: a 1 st surface 126 on which the 2 nd light source 104 is mounted; and a 2 nd surface 128 to which a plurality of 1 st fins 124 are attached. The 1 st light source 102 is disposed between the 1 st fins 124 so that the light emission direction is directed toward the 2 nd surface 128. This can improve the cooling efficiency of the 1 st light source 102 and the 2 nd light source 104. Further, the vehicle lamp 2 can be miniaturized.
In addition, an optical element 112 is provided to the projection lens 110. This reduces the number of components of the vehicle lamp 2, and can simplify the structure of the vehicle lamp 2.
The present invention is not limited to the above-described embodiments, and various modifications such as design changes can be made based on the knowledge of those skilled in the art, and embodiments to which such modifications are added are also included in the scope of the present invention. The new embodiment obtained by adding the modification to the above embodiment has both the effects of the combined embodiment and the modification.
In the embodiment, the light emitting direction of the low beam light source 104a is the vertical direction, but the posture of the lamp unit 100 is not particularly limited for convenience of description. The structure for forming the light distribution pattern for the front observation is not limited to the combination of the low beam light source 104a, the high beam light source 104b, the 2 nd reflector 138, and the shielding portion 142. For example, a light distribution pattern for the front view may be formed by a plurality of light sources arranged in a matrix.
In the embodiment, the imaging device 10 and the control device 12 are provided inside the lamp room 8, but may be provided outside the lamp room 8 as appropriate. For example, a conventional camera mounted in a vehicle cabin may be used as the imaging device 10. Further, the 1 st light source 102 may radiate non-visible light such as infrared light. This can avoid the situation where visibility of the driver is impaired by the road surface drawing pattern PS. Therefore, the degree of freedom in the formation position of the road surface drawing pattern PS can be improved.
In the embodiment, the road surface drawing pattern PS is used as a pattern for adjusting the optical axis, but is not particularly limited to this configuration. The road surface drawing pattern PS may be, for example, characters, graphics, symbols, or the like formed for the purpose of prompting the attention of pedestrians, drivers of the host vehicle, drivers of other vehicles, or the like, or prompting various information thereto.
[ description of reference numerals ]
1 vehicle lamp system, 2 vehicle lamp, 10 camera, 12 control device, 102 st light source, 104 nd light source, 106 st heat sink, 108 nd heat sink, 110 projection lens, 112 optical element, 122 base portion, 124 st fin, 126 st surface, 128 nd surface, 132 nd fin.
[ Industrial availability ]
The present invention can be used in a vehicle lamp and a vehicle lamp system.

Claims (5)

1. A vehicle lamp, comprising:
a 1 st light source for forming a road surface drawing pattern,
an optical element for controlling the traveling direction of the light of the 1 st light source to form the road surface drawing pattern,
a 2 nd light source for forming a light distribution pattern for a driver to observe the front, and
a projection lens for projecting the light of the 1 st light source and the 2 nd light source to the front of the lamp,
the projection lens has a light incident area on which light of the 1 st light source and light of the 2 nd light source are incident on a light incident surface on which light of the 1 st light source and light of the 2 nd light source are incident, and a light emitting area on which light of the 1 st light source and light of the 2 nd light source are emitted on a light emitting surface on which light of the 1 st light source and light of the 2 nd light source are emitted,
the optical element is integrally formed with the projection lens in the light incident region.
2. A vehicle lamp, comprising:
a 1 st light source for forming a road surface drawing pattern,
an optical element for controlling the traveling direction of the light of the 1 st light source to form the road surface drawing pattern,
a 2 nd light source for forming a light distribution pattern for a driver to observe the front, and
a 1 st heat sink for supporting the 1 st light source and the 2 nd light source,
the LED lamp further comprises a 2 nd radiating fin connected to the 1 st light source;
the 1 st fin has a plurality of 1 st fins;
the 2 nd cooling fin is provided with a plurality of 2 nd fins;
the 1 st fin and the 2 nd fin are arranged in parallel,
the 1 st heat sink has a base portion having a 1 st surface on which the 2 nd light source is mounted, and a 2 nd surface which faces an opposite side of the 1 st surface and connects the plurality of 1 st fins;
the 1 st light source is arranged between the 1 st fins so that a light emitting direction is directed toward the 2 nd surface side.
3. The vehicular lamp according to claim 1 or 2, wherein,
the 2 nd light source comprises a plurality of light sources;
each light source is allocated to a plurality of individual areas arranged in front of the host vehicle, and irradiates light to the corresponding individual areas.
4. The vehicular lamp according to claim 3, wherein,
the 2 nd light source further includes a low beam light source for forming a low beam light distribution pattern having a predetermined cutoff line;
the plurality of light sources respectively irradiate light to a plurality of individual regions arranged above the cutoff line in the vehicle width direction.
5. A lamp system for a vehicle, comprising:
an imaging device for imaging the front of the host vehicle,
the vehicular lamp according to any one of claims 1 to 4, and
a control device that adjusts an optical axis of the vehicle lamp;
the control device adjusts the optical axis based on the position of the road surface drawing pattern included in the image data acquired from the imaging device.
CN201980016611.6A 2018-03-07 2019-03-01 Vehicle lamp and vehicle lamp system Active CN111867886B (en)

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PCT/JP2019/008230 WO2019172148A1 (en) 2018-03-07 2019-03-01 Vehicle lamp fitting and vehicle lamp fitting system

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