CN111867886A - Vehicle lamp and vehicle lamp system - Google Patents

Vehicle lamp and vehicle lamp system Download PDF

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Publication number
CN111867886A
CN111867886A CN201980016611.6A CN201980016611A CN111867886A CN 111867886 A CN111867886 A CN 111867886A CN 201980016611 A CN201980016611 A CN 201980016611A CN 111867886 A CN111867886 A CN 111867886A
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CN
China
Prior art keywords
light source
light
vehicle
lamp
heat sink
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.)
Granted
Application number
CN201980016611.6A
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Chinese (zh)
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CN111867886B (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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Publication of CN111867886B publication Critical patent/CN111867886B/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/16—Laser light sources
    • 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
    • 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
    • B60Q1/26—Arrangement 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/12—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of emitted light
    • F21S41/13—Ultraviolet light; Infrared light
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/141—Light emitting diodes [LED]
    • F21S41/147—Light emitting diodes [LED] the main emission direction of the LED being angled to the optical axis of the illuminating device
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/141—Light emitting diodes [LED]
    • F21S41/147—Light emitting diodes [LED] the main emission direction of the LED being angled to the optical axis of the illuminating device
    • F21S41/148—Light emitting diodes [LED] the main emission direction of the LED being angled to the optical axis of the illuminating device the main emission direction of the LED being perpendicular to the optical axis
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/162—Incandescent light sources, e.g. filament or halogen lamps
    • 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
    • F21S41/17—Discharge light sources
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • 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
    • F21S41/176—Light sources where the light is generated by photoluminescent material spaced from a primary light generating element
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/25—Projection lenses
    • F21S41/255—Lenses with a front view of circular or truncated circular outline
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/25—Projection lenses
    • F21S41/275—Lens surfaces, e.g. coatings or surface structures
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • 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
    • F21S45/43—Forced cooling using gas
    • 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
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/502—Cooling arrangements characterised by the adaptation for cooling of specific components
    • F21V29/503—Cooling arrangements characterised by the adaptation for cooling of specific components of light sources
    • 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
    • F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
    • F21V29/50—Cooling arrangements
    • F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
    • F21V29/74—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades
    • F21V29/76—Cooling 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 vehicular 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 the light from the 1 st light source (102) and the 2 nd light source (104) in 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 for warning a pedestrian or a driver of another vehicle on a road surface (for example, see 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 the front are housed in a lamp chamber formed by a lamp body and a front cover.
[ Prior art documents ]
[ patent document ]
Patent document 1 Japanese laid-open patent publication No. 2008-094127
Disclosure of Invention
[ problems to be solved by the invention ]
There is a constant demand for simplifying the structure of a vehicle lamp. The present inventors have intensively studied and found a novel lamp structure capable of simplifying the structure of a vehicle lamp capable of forming a road surface drawing pattern and a light distribution pattern for observing the front.
The present invention has been made in view of such circumstances, and an object thereof is to provide a technique for simplifying the structure of a vehicle lamp capable of forming a road surface drawing pattern and a light distribution pattern for observing the front.
[ means for solving the problems ]
In order to solve the above problem, one aspect of the present invention is a lamp for a vehicle. The vehicular lamp includes: 1 st light source for forming a road surface drawing pattern; an optical element which 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 for forming a light distribution pattern for a driver to observe a forward direction; and a projection lens for projecting the light from the 1 st light source and the light from 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 also a vehicular lamp. The vehicular lamp includes: 1 st light source for forming a road surface drawing pattern; an optical element which 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 for forming a light distribution pattern for a driver to observe a forward direction; 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 may further include a 2 nd heat sink connected to the 1 st light source, the 1 st heat sink may have a plurality of 1 st fins, the 2 nd heat sink may have a plurality of 2 nd fins, and the 1 st fins and the 2 nd fins may be arranged in parallel. In the above aspect, 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 facing the opposite side of the 1 st surface and connecting the plurality of 1 st fins, and the 1 st light source may be disposed between the plurality of 1 st fins so that the light emission direction is directed to the 2 nd surface side. In the above aspect, the optical element may be provided in the projection lens. In any of the above embodiments, the 2 nd light source may include a plurality of light sources, and each light source may be assigned to each of a plurality of individual regions arranged in front of the vehicle and may irradiate light 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 emit light to a plurality of individual regions arranged in the vehicle width direction above the cutoff line.
Still another aspect of the present invention is a vehicular lamp system. 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-described constituent elements and the conversion of the expression of the present invention between a method, an apparatus, a system, and the like are also effective as aspects of the present invention.
[ Effect of the invention ]
According to the present invention, it is possible to provide a technique for simplifying the structure of a vehicle lamp capable of forming a road surface drawing pattern and a light distribution pattern for observing the front.
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 including the 1 st light source.
Fig. 5 is a diagram schematically showing a light distribution pattern formed by the vehicle lamp according to 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, and are merely examples, and not all the features or combinations thereof described in the embodiments are essential to the invention. The same or equivalent constituent elements, members, and processes shown in the respective drawings are denoted by the same reference numerals, and overlapping descriptions are appropriately omitted. In addition, the scale or shape of each part shown in the drawings is set cheaply for ease of explanation, and is not construed restrictively unless otherwise noted. In addition, when the terms "1 st", "2 nd", and the like are used in the present specification or claims, the terms do not denote any order or importance unless otherwise specified, but are used to distinguish one component from another.
Fig. 1 is a diagram showing a schematic configuration of a vehicle lamp system according to an embodiment. In fig. 1, some of the constituent elements of the vehicle lamp system 1 are depicted as functional blocks. These functional blocks are realized as hardware components, by elements or circuits represented by a CPU or a memory of a computer, and as software components, by computer programs or the like. Those skilled in the art will appreciate that the functional blocks can be implemented in various forms through a combination of hardware and software.
The vehicle lamp system 1 is applied to a vehicle headlamp apparatus having a pair of headlamp units arranged on the left and right of the front of a vehicle. Since the pair of headlamp units have a substantially bilaterally symmetric structure and substantially the same structure, fig. 1 shows only the structure of one headlamp 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 vehicular lamp 2 includes: a lamp body 4 having an opening on the vehicle front side; and a light-transmitting cover 6 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 a lamp body 4 and a translucent cover 6. In the present embodiment, the imaging device 10 and the control device 12 are also housed in the lamp chamber 8.
(image pickup device)
The imaging device 10 is a device that images the front of the 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. Further, the control device 12 of the present embodiment specifies the light distribution pattern formed by the vehicle lamp 2. In addition, the optical axis adjustment 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 sends 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 present in front of the vehicle from the image data acquired from the camera 10. The image analysis unit 16 can detect the preceding vehicle by a conventionally known method including algorithm recognition, deep learning (deep learning), and the like. For example, the image analysis unit 16 holds feature points representing the preceding vehicle in advance. Then, when the feature point is present in the image data, the image analysis unit 16 recognizes the position of the preceding vehicle. The "feature point" mentioned above means, for example, a light spot having a predetermined luminous intensity or more appearing in an estimated presence area of a headlight of a oncoming vehicle or a taillight of a preceding vehicle. The position information of the preceding vehicle is sent to the light distribution pattern determination unit 22.
The optical axis displacement amount determining unit 18 detects a displacement amount between an initial position determined in advance and an actual position 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 determination unit 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 initial optical axis position is obtained by the lamp unit 100. 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 implemented 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 determination unit 18 transmits information on the amount of displacement of the optical axis position to the actuator control unit 20.
The actuator control unit 20 determines the drive amount of the actuator 14 based on the shift amount of the optical axis position acquired from the optical axis displacement amount determination unit 18. For example, the actuator control unit 20 holds a conversion table in which the amount of shift in the optical axis position corresponds to the driving amount of the actuator 14 in advance, 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 the light distribution pattern formed by the lamp unit 100 based on the position information of the vehicle ahead acquired from the image analysis unit 16. The light distribution pattern determined by the light distribution pattern determining unit 22 has a light shielding portion or a light reducing portion that overlaps with the existing position of the preceding vehicle. The light distribution pattern determination unit 22 transmits a signal indicating the determined light distribution pattern to the light source control unit 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 determination unit 22. The lighting state controlled by the light source control unit 24 includes not only lighting on/off of the light source but also the intensity of the emitted light. As a result, a light distribution pattern having a light shielding portion or a light reduction portion in the area where the front vehicle exists is formed in front of the lamp. Further, the image analysis unit 16 may detect a pedestrian or a road sign, and form a light shielding portion or a light reducing portion in the pedestrian or the road sign.
(actuator)
The actuator 14 is a device that changes the posture of the lamp unit 100. For example, the actuator 14 is composed of 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 driving signal transmitted 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 known configuration.
(Lamp unit)
The lamp unit 100 is a device that irradiates light forward of the vehicle to form a predetermined light distribution pattern. The lamp unit 100 is supported by the lamp body 4 via a known swing mechanism. Thereby, the lamp unit 100 can change the posture in accordance with 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 including the 1 st light source. Fig. 3 illustrates a state in which the projection lens is removed. The lamp unit 100 includes 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 as main components.
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 fixed 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 in a state where the collimator lens 118 is held 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 another semiconductor Light emitting element such as an LED (Light emitting diode) or an 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 formed of a semiconductor light emitting element such as an LED, an LD, or an EL. The 2 nd light source 104 may be an electric 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 104 b.
The 1 st heat sink 106 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 heat sink 106 has 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 an opposite side of the 1 st surface 126.
In the 1 st surface 126, comprising: 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. The low-beam light source 104a is placed on the parallel surface 126a with the light exit surface facing vertically upward. 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 on the parallel surface 126a side of the inclined surface 126 b. The plurality of high-beam light sources 104b are arranged in the vehicle width direction. Each high beam light source 104b is placed on the inclined surface 126b with its light emitting surface facing the projection lens 110.
A plurality of 1 st fins 124 are connected to the 2 nd surface 128. The plurality of 1 st fins 124 protrude from the 2 nd surface 128 in a direction opposite to the light emission direction of the low-beam light source 104 a.
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 heat sink 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 the 2 nd fins 132 are connected to the surface of the base portion 130 opposite to the one surface.
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 disposed between the 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 aligned 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 structure is not particularly limited to this structure. For example, the 2 nd heat radiation fins 108 may be fitted to the 1 st heat radiation fins 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 exit 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 in the same direction as the light emitting surface of the low-beam light source 104 a.
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 luminaire. The 1 st heat sink 106 has a through hole 136 at the lamp front side of the 1 st reflector 134. The through hole 136 penetrates the base portion 122 and the 1 st fins 124 and extends in the front-rear direction of the lamp. The laser light reflected by the 1 st reflector 134 travels toward the front side of the lamp within 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 104 a. The 2 nd reflector 138 has a reflecting surface 140 having a shape based on an ellipsoid of revolution. 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 follows: 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 (shade) portion 142 is provided at a 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 104 a. The shielding portion 142 has a ridge line 142a having a shape corresponding to a cutoff line of a light distribution pattern described later. The positional relationship between the shielding portion 142 and the 2 nd reflector 138 is determined such that the ridge line 142a is located in the vicinity of the 2 nd focal point 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 through the base portion 122 of the 1 st heat radiation fin 106. Further, the heat generated in the 1 st light source 102 is mainly diffused to the 2 nd fins 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 to 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 blows air to the plurality of 1 st fins 124 and the plurality of 2 nd fins 132. This promotes the diffusion of the heat transferred to the plurality of 1 st fins 124 and the plurality of 2 nd fins 132.
A frame-shaped 2 nd lens holder 144 is fixed to the base portion 122 on the lamp front side. The 2 nd lens holder 144 holds the peripheral edge 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 formed of, for example, a free-form surface lens having a free-form surface shape on the front surface and the rear surface. The projection lens 110 projects the light source image formed on the rear focal plane as a reverse 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 its rear focal point 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 formed of, for example, a diffraction grating (also referred to as a Diffractive Optical Element (DOE)). In the present embodiment, the optical element 112 is formed of a transmission type diffraction grating, and is provided in the projection lens 110. Specifically, the optical element 112 is provided in a region overlapping with the 1 st reflector 134 as viewed from the front-rear direction of the lamp, in the rear-side surface of the projection lens 110. The projection lens 110 is integrally formed with the optical element 112.
The 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 entering the low beam light source 104a of the projection lens 110 is emitted 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 with 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. Further, a part of the light emitted from the high-beam light source 104b may be reflected by the 1 st sub-reflector 148a disposed above the high-beam light source 104b and/or the 2 nd sub-reflector 148b disposed below the high-beam light source 104b and incident on the projection lens 110. The light entering each high beam light source 104b of 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, passes through the optical element 112, and enters the projection lens 110. The light of the 1 st light source 102 incident on the projection lens 110 is irradiated as substantially parallel light to the front of the lamp. 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 according to the embodiment. Fig. 5 shows a light distribution pattern formed on a virtual vertical screen disposed 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 104 a. 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 vehicle lane side cutoff line CL2, and an oblique cutoff line CL 3.
The opposite lane side cut-off line CL1 extends parallel to the horizontal line H on the opposite lane side, the vehicle lane side cut-off line CL2 extends parallel to the horizontal line H on the vehicle lane side at a position higher than the opposite lane side cut-off line CL1, and the inclined cut-off line CL3 connects the opposite lane side cut-off line CL1 and the vehicle lane side cut-off line CL 2. The cutoff line of the low beam light distribution pattern PL corresponds to the shape of the ridge line 142 a.
The high-beam light distribution pattern PH is formed by light emitted from the plurality of high-beam light sources 104 b. The light distribution pattern PH for high beam is a light distribution pattern for the driver to observe the front. The high beam light distribution pattern PH is projected onto 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 lighting state of each high-beam light source 104b can be adjusted independently. The high-beam light sources 104b are respectively assigned to a plurality of individual regions R arranged in front of the vehicle, and irradiate the corresponding individual regions R with light. The individual regions R and the high-beam light sources 104b may be allocated in a one-to-one manner, 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 lighting state of each high beam light source 104b is controlled by the light source control unit 24 according to the shape of the light distribution pattern determined by the light distribution pattern determination unit 22. Thus, the light distribution pattern PH for high beam having the light blocking portion or the light reducing portion is formed in the individual region R where the preceding vehicle exists.
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, the 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 determination unit 18 can detect the amount of displacement of the optical axis position, and may be other shapes such as a straight line extending in the horizontal direction or a straight line extending in the vertical direction. The position at which the road surface drawing pattern PS is formed can be set arbitrarily as long as it does not obstruct the visibility of the driver and is a position at which the image pickup device 10 can pick up an image.
As described above, the vehicle lamp 2 of the present embodiment includes: a 1 st light source 102 for forming a road surface drawing pattern PS; an optical element 112 that controls the traveling direction of the 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 the driver to observe the front; and a projection lens 110 that projects the 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 viewing forward 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 observation of the front.
Further, the vehicular lamp 2 includes: 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 1 st heat sink 106 in common. This can simplify the structure of the vehicle lamp capable of forming the road surface drawing pattern PS and the light distribution pattern for observation of the front.
That is, according to the present embodiment, the road surface drawing pattern PS and the light distribution pattern for observing the front can be formed by a single lamp unit 100. This makes it possible to simplify the structure as compared with a conventional vehicle lamp in which the road surface drawing pattern PS and the light distribution pattern for forward observation are formed by separate lamp units. In addition, this can reduce the size of the vehicle lamp.
Further, the vehicle lamp system 1 of the present embodiment includes: an imaging device 10 that images the front of the vehicle; a vehicular 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 a light distribution pattern for observation forward with high positional accuracy. Further, 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 of the high-beam light sources 104b is assigned to a plurality of individual regions R arranged in front of the vehicle and irradiates the corresponding individual region R with light. 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 irradiate light onto a plurality of individual regions R arranged in the vehicle width direction above the cutoff line.
Thus, ADB (Adaptive Driving Beam) control can be realized, and the light distribution pattern of the high Beam is dynamically and adaptively controlled 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 oncoming vehicle located in front of the own vehicle is detected, and a light distribution pattern having a light shielding portion or a light reducing portion in an individual region R corresponding to the preceding vehicle is formed. As a result, glare to the preceding vehicle is reduced. Further, according to the present embodiment, since the positional accuracy of the light distribution pattern for forward observation can be improved by the road surface drawing pattern PS, the accuracy of the ADB control can be improved.
Further, the vehicle lamp 2 includes a 2 nd heat sink 108 connected to the 1 st light source 102. The 1 st heat sink 106 has a plurality of 1 st fins 124, and the 2 nd heat sink 108 has a plurality of 2 nd fins 132. The 1 st fins 124 and the 2 nd fins 132 are arranged in parallel. This makes it possible to apply the cooling structure of the 1 st heat sink 106 to the 2 nd heat sink 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 heat sink 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 to 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.
Further, an optical element 112 is provided to the projection lens 110. This can reduce 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 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 the combined effects of the embodiment and the modification.
In the embodiment, for convenience of explanation, the light emission direction of the low-beam light source 104a is set to be the vertical direction upper side, but the posture of the lamp unit 100 is not particularly limited. The structure for forming the light distribution pattern for viewing the front 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 observing the front 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 chamber 8, but may be provided outside the lamp chamber 8 as appropriate. For example, an existing camera mounted in a vehicle cabin may be used as the imaging device 10. The 1 st light source 102 may emit invisible light such as infrared light. This can avoid the road surface drawing pattern PS from obstructing the visibility of the driver. Therefore, the degree of freedom of 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 warning the attention of pedestrians, drivers of own vehicles, drivers of other vehicles, or the like, or presenting various information thereto.
[ description of reference numerals ]
The vehicle lighting system 1, the vehicle lighting system 2, the imaging device 10, the control device 12, the 1 st light source 102, the 2 nd light source 104, the 1 st heat sink 106, the 2 nd heat sink 108, the projection lens 110, the optical element 112, the base portion 122, the 1 st fin 124, the 1 st surface 126, the 2 nd surface 128, and the 2 nd fin 132.
[ Industrial availability ]
The present invention can be used for a vehicle lamp and a vehicle lamp system.

Claims (8)

1. A lamp for a vehicle, characterized by 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 the driver to observe the front, an
And a projection lens for projecting the light from the 1 st light source and the light from the 2 nd light source to the front of the lamp.
2. A lamp for a vehicle, characterized by 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 the driver to observe the front, an
And a 1 st heat sink supporting the 1 st light source and the 2 nd light source.
3. The vehicular lamp according to claim 2, wherein,
further comprising a 2 nd heat sink connected to the 1 st light source;
the 1 st heat sink has a plurality of 1 st fins;
the 2 nd heat sink has a plurality of 2 nd fins;
the 1 st fin and the 2 nd fin are arranged in parallel.
4. The vehicular lamp according to claim 3, wherein,
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 facing the opposite side of the 1 st surface and to which the plurality of 1 st fins are connected;
the 1 st light source is disposed between the 1 st fins so that a light emitting direction is directed to the 2 nd surface side.
5. The vehicular lamp according to claim 1, wherein,
the optical element is provided on the projection lens.
6. The vehicular lamp according to any one of claims 1 to 5, wherein,
the 2 nd light source comprises a plurality of light sources;
each light source is assigned to a plurality of individual regions arranged in front of the vehicle, and irradiates light to the corresponding individual region.
7. The vehicular lamp according to claim 6, 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 irradiate light onto a plurality of individual regions arranged in the vehicle width direction above the cutoff line.
8. A lamp system for a vehicle, comprising:
an imaging device that images the front of the vehicle,
the vehicular lamp according to any one of claims 1 to 7, and
a control device that adjusts an optical axis of the vehicle lamp;
the control device adjusts the optical axis based on a 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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