CN112443810A - Lamp unit - Google Patents

Lamp unit Download PDF

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Publication number
CN112443810A
CN112443810A CN202010858268.4A CN202010858268A CN112443810A CN 112443810 A CN112443810 A CN 112443810A CN 202010858268 A CN202010858268 A CN 202010858268A CN 112443810 A CN112443810 A CN 112443810A
Authority
CN
China
Prior art keywords
lamp unit
spatial light
light modulator
unit
support substrate
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.)
Pending
Application number
CN202010858268.4A
Other languages
Chinese (zh)
Inventor
佐藤隆芳
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Koito Manufacturing Co Ltd
Original Assignee
Koito Manufacturing Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Koito Manufacturing Co Ltd filed Critical Koito Manufacturing Co Ltd
Publication of CN112443810A publication Critical patent/CN112443810A/en
Pending legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—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]
    • 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
    • F21S41/265—Composite lenses; Lenses with a patch-like shape
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
    • F21S41/32—Optical layout thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/10—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the light source
    • F21S43/13—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the light source characterised by the type of light source
    • F21S43/14—Light emitting diodes [LED]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/30—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by reflectors
    • F21S43/31—Optical layout thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S45/00—Arrangements within vehicle lighting devices specially adapted for vehicle exteriors, for purposes other than emission or distribution of light
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • 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
    • F21S45/42—Forced cooling
    • F21S45/43—Forced cooling using gas
    • F21S45/435—Forced cooling using gas circulating the gas within a closed system
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S45/00—Arrangements within vehicle lighting devices specially adapted for vehicle exteriors, for purposes other than emission or distribution of light
    • F21S45/40—Cooling of lighting devices
    • F21S45/47—Passive cooling, e.g. using fins, thermal conductive elements or openings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V19/00—Fastening of light sources or lamp holders
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V19/00—Fastening of light sources or lamp holders
    • F21V19/001—Fastening of light sources or lamp holders the light sources being semiconductors devices, e.g. LEDs
    • 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
    • F21V23/00—Arrangement of electric circuit elements in or on lighting devices
    • 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
    • F21V23/00—Arrangement of electric circuit elements in or on lighting devices
    • F21V23/06—Arrangement of electric circuit elements in or on lighting devices the elements being coupling devices, e.g. connectors
    • 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
    • F21V29/505—Cooling arrangements characterised by the adaptation for cooling of specific components of reflectors
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2103/00—Exterior vehicle lighting devices for signalling purposes
    • F21W2103/60—Projection of signs from lighting devices, e.g. symbols or information being projected onto the road
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2107/00—Use or application of lighting devices on or in particular types of vehicles
    • F21W2107/10—Use or application of lighting devices on or in particular types of vehicles for land vehicles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)

Abstract

The present invention relates to a lamp unit, and can form various light distribution patterns with a compact structure in the lamp unit provided with a reflective spatial light modulator. By configuring such that light from the light source reflected by the spatial light modulator is irradiated toward the front of the cell via the projection lens, various light distribution patterns can be formed with high accuracy. In addition to the above, the following structure is provided: the lamp unit includes: a support substrate that supports the spatial light modulator in an electrically connected state; a control substrate that controls the spatial light modulator; and a flexible printed wiring board electrically connecting the support substrate and the control substrate. In this case, the control board is arranged to face the support board at a position behind the support board in the unit. Thus, the lamp unit can be made more compact than in the case where the control board is disposed in a positional relationship not overlapping the support board when the unit is viewed from the front.

Description

Lamp unit
Technical Field
The present invention relates to a lamp unit including a reflective spatial light modulator.
Background
Conventionally, as an in-vehicle lamp unit, for example, as described in "patent document 1", there is known a lamp unit configured as follows: the light from the light source reflected by the spatial light modulator is irradiated to the front of the cell via an optical member such as a projection lens.
The lamp unit described in patent document 1 is configured to be able to form various light distribution patterns with high accuracy by controlling the spatial distribution of reflected light in the spatial light modulator.
Documents of the prior art
Patent document
Patent document 1: japanese patent laid-open publication No. 2016-91976
Disclosure of Invention
Problems to be solved by the invention
In the lamp unit described above, if the control board for controlling the spatial light modulator is electrically connected to the support board for supporting the spatial light modulator via the flexible printed wiring board, it is possible to easily control the spatial distribution of the reflected light in the spatial light modulator.
In this case, when the control board is disposed in a positional relationship not overlapping the support board when viewed from the front of the unit, the lamp unit is large in size, and it is therefore difficult to tilt the lamp unit and adjust the optical axis of the lamp unit.
The present invention has been made in view of the above circumstances, and an object thereof is to provide a lamp unit including a reflective spatial light modulator, in which various light distribution patterns can be formed with a compact configuration.
Means for solving the problems
The present invention achieves the above object by making an improvement in the configuration of the control substrate.
That is, the lamp unit according to the present invention includes: a light source; a spatial light modulator that reflects light from the light source; and an optical member that irradiates the light reflected by the spatial light modulator toward the front of the lamp unit,
the lamp unit includes: a support substrate that supports the spatial light modulator in an electrically connected state with the spatial light modulator; a control substrate that controls the spatial light modulator; and a flexible printed wiring board electrically connecting the support substrate and the control substrate,
the control board is disposed to face the support board at a position behind the lamp unit with respect to the support board.
The "spatial light modulator" is not particularly limited as long as it is a member capable of controlling the spatial distribution of light reflected from a light source when the light is reflected, and for example, a member using a digital micromirror device, a member using a reflective liquid crystal, or the like can be used.
The "optical member" is not particularly limited as long as it is a member configured to irradiate the light from the light source reflected by the spatial light modulator toward the front of the cell, and for example, a projection lens, a reflector, a mirror, or the like can be used.
As long as the "control board" is disposed to face the support board at a position on the unit rear side of the support board, specific arrangement angles, intervals between the control board and the support board, and the like are not particularly limited. In this case, the phrase "arranged to face the support substrate" means that the support substrate is arranged at an inclination angle within ± 30 ° from a state of being arranged to extend parallel to the support substrate.
Effects of the invention
Since the lamp unit according to the present invention is configured such that light from the light source reflected by the spatial light modulator is irradiated toward the front of the unit via the optical member, various light distribution patterns can be formed with high accuracy by controlling the spatial distribution of the reflected light in the spatial light modulator.
In addition to the above, the lamp unit includes: a support substrate that supports the spatial light modulator in an electrically connected state; a control substrate that controls the spatial light modulator; and a flexible printed wiring board electrically connecting the support substrate and the control substrate, wherein the control substrate is arranged to face the support substrate at a position behind the support substrate with respect to the unit, and therefore the following operational effects can be obtained.
That is, by configuring the control board so as to face the support board at a position on the unit rear side of the support board, the lamp unit can be configured to be more compact than a case where the control board is configured so as not to overlap the support board when viewed from the unit front side.
As described above, according to the present invention, various light distribution patterns can be formed in a compact configuration in a lamp unit including a reflective spatial light modulator. Thus, the lamp unit can be easily tilted to adjust the optical axis thereof.
In the above configuration, if the control board is further arranged to extend parallel to the support board, the lamp unit can be made more compact.
In the above configuration, if the peripheral portion of the spatial light modulator is supported from the cell rear side as the support substrate and the heat sink is disposed in contact with the central portion of the spatial light modulator at the position on the cell rear side of the support substrate, and the control substrate is disposed at the position on the cell rear side of the heat sink, the following operational effects can be obtained.
That is, the heat generated by the spatial light modulator can be efficiently released by the heat sink abutting on the central portion. In addition to the above, the flexible printed wiring board can be arranged appropriately by configuring the control board to be arranged at the unit rear side of the heat sink.
In the above configuration, if the first connector is mounted on the support substrate and the second connector is mounted on the control substrate, and the first connector and the second connector are inserted into both ends of the flexible printed wiring board, the support substrate and the control substrate can be easily electrically connected to each other.
In this case, if the first connector is configured to be opened downward at the lower end portion of the support substrate and the second connector is configured to be opened downward at the lower end portion of the control substrate, even if moisture adheres to the flexible printed wiring board, the moisture can be prevented from flowing down the flexible printed wiring board and entering the inside of the first connector and the second connector.
Drawings
Fig. 1 is a side sectional view showing a vehicle lamp including a lamp unit according to an embodiment of the present invention.
Fig. 2 is a perspective view showing the lamp unit.
Fig. 3 is a plan view showing the lamp unit.
Fig. 4 is a perspective view showing the lamp unit in an exploded manner.
Fig. 5 is a detailed view of the main portion of fig. 1.
Fig. 6 is a detailed view of the main portion of fig. 5.
Fig. 7 is a detailed view of section VII of fig. 1.
Fig. 8 is a perspective view of a light distribution pattern formed by the light emitted from the lamp unit.
Fig. 9 is a side sectional view showing a vehicle lamp according to a modification of the above embodiment.
Description of the reference numerals
10. 110: a lamp unit;
20: a spatial light modulation unit;
22: a support substrate;
24: a radiator for the spatial light modulator;
24 a: a protrusion portion;
24 b: a heat radiation fin for a spatial light modulator;
26: a socket;
30: a spatial light modulator;
30A: a reflection control unit;
30 As: a reflective element;
30B: a frame body portion;
30C: a light-transmitting plate;
40: a bracket;
40A: a plumb face portion;
40 Aa: an opening part;
40 Ab: a protrusion portion;
40 Ac: an annular flange portion;
40B: a shelf portion;
50: a light source side subassembly;
52: a light source;
54. 254: a reflector;
56: a substrate;
58: a connector;
60: a control substrate;
62A: a first connector;
62B: a second connector;
62Aa, 62 Ba: an opening part;
62Ab, 62 Bb: a metal terminal;
64. 164: a flexible printed wiring board;
66: a conductive wire;
70: a lens-side subassembly;
72: a projection lens;
72A: a first lens;
72B: a second lens;
72C: a third lens;
74: a lens holder;
74 a: a flange portion;
74 b: a lower protrusion;
76A: a first metal member;
76B: a second metal piece;
80: a heat sink for the light source;
80 a: a heat radiation fin for a light source;
82: a cooling fan;
90: an electromagnetic shield;
100. 200: a vehicular lamp;
102: a lamp body;
104: a light-transmitting cover;
ax: an optical axis;
ax 1: a central axis;
CL 1: a horizontal cut-off;
CL 2: inclining a light and shade cut-off line;
e: an elbow point;
f: a back focus;
PA: a light distribution pattern for road surface drawing;
PL: a light distribution pattern for low beam;
r1, R2: an optical path;
z1: and (4) a region.
Detailed Description
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
Fig. 1 is a side sectional view showing a vehicle lamp 100 including a lamp unit 10 according to an embodiment of the present invention. Fig. 2 is a perspective view showing the lamp unit 10, and fig. 3 is a plan view showing the lamp unit 10. Further, fig. 4 is a perspective view showing the lamp unit 10 in an exploded manner.
In these figures, the direction indicated by X is the "cell front", the direction indicated by Y is the "left direction" (the "right direction" when the cell is viewed from the front) orthogonal to the "cell front", and the direction indicated by Z is the "upper direction". The same applies to figures other than these figures.
The vehicle lamp 100 is a road surface drawing lamp provided at a front end portion of a vehicle, and is configured as follows: the lamp unit 10 is accommodated in a lamp chamber formed by a lamp body 102 and a light-transmitting cover 104 in a state in which an optical axis is adjusted so that a front-rear direction thereof (i.e., a unit front-rear direction) coincides with a vehicle front-rear direction.
The lamp unit 10 is configured to include a spatial light modulation unit 20, a light source side sub-assembly 50, a lens side sub-assembly 70, and a bracket 40 supporting them.
The bracket 40 is a member made of metal (for example, made of aluminum die-cast), and includes a vertical surface portion 40A extending along a vertical plane orthogonal to the unit front-rear direction, and a frame portion 40B extending toward the unit front side in a lower region of the vertical surface portion 40A.
The lamp unit 10 is supported by the lamp body 102 via an unillustrated mounting structure on the vertical surface portion 40A of the bracket 40, and is tiltable in the vertical direction and the horizontal direction with respect to the lamp body 102.
The spatial light modulation unit 20 includes: a spatial light modulator 30; a support substrate 22 disposed on the cell rear side of the spatial light modulator 30; and a heat sink 24 for the spatial light modulator, which is disposed on the cell rear side of the support substrate 22. At this time, the support substrate 22 is formed to extend to a position below the heat sink 24 for the spatial light modulator.
The light source side unit 50 includes a pair of right and left light sources (specifically, light emitting diodes) 52 mounted on a substrate 56, and reflectors 54 for reflecting light emitted from the light sources 52 toward the spatial light modulation unit 20. At this time, the reflecting surface of the reflector 54 is configured to converge the light emitted from each light source 52 at a position shifted upward with respect to the rear focal point F (see fig. 1) of the projection lens 72. A connector 58 for supplying power to the pair of right and left light sources 52 is mounted on the substrate 56.
The frame portion 40B of the bracket 40 is formed to extend from the vertical surface portion 40A in the horizontal direction toward the front of the unit and then extend obliquely forward and downward, and the substrate 56 and the reflector 54 of the light source side module 50 are supported on the upper surface of the inclined region.
The lens-side subassembly 70 includes: a projection lens 72 having an optical axis Ax extending in the unit front-rear direction; and a lens holder 74 that supports the projection lens 72, and the lens side subassembly 70 is supported by the bracket 40 at a rear end portion of the lens holder 74.
A light source heat sink 80 and a cooling fan 82 for releasing heat generated by the lighting of each light source 52 are disposed below the frame portion 40B of the bracket 40. The light source heat sink 80 is formed integrally with the bracket 40, and includes a plurality of light source heat radiation fins 80a extending toward the rear of the unit. The cooling fan 82 is disposed on the unit rear side of the plurality of light source heat radiation fins 80 a.
The lamp unit 10 according to the present embodiment is configured as follows: by irradiating the light from each light source 52 reflected by the reflector 54 toward the unit front side via the spatial light modulator 30 and the projection lens 72, a light distribution pattern for drawing characters, marks, and the like (that is, a light distribution pattern for drawing a road surface) can be formed on a road surface ahead of the vehicle with high accuracy.
To achieve this, the lamp unit 10 is formed in the following structure: the apparatus includes a control board 60, and a control circuit (not shown) for controlling the spatial light modulator 30 based on a video signal from a vehicle-mounted camera (not shown) is mounted on the control board 60.
As shown in fig. 1, the control board 60 is disposed so as to face the support board 22 (specifically, so as to extend parallel to the support board 22) at a position on the unit rear side of the spatial light modulator heat sink 24, and is supported by an electromagnetic shield 90 or the like, which will be described later, via a support member (not shown). The control board 60 is electrically connected to the support board 22 via a flexible printed wiring board 64.
Fig. 5 is a detailed diagram of the spatial light modulator 20, and is a detailed diagram of a main part of fig. 1.
As shown in fig. 5, the spatial light modulator 30 is a Digital Micromirror Device (DMD) and includes: a reflection control unit 30A in which a plurality of reflection elements (specifically, hundreds of thousands of micromirrors) 30As are arranged in a matrix; a housing 30B that houses the reflection control section 30A; and a light-transmitting plate 30C supported by the frame portion 30B in a state of being disposed on the cell front side of the reflection control portion 30A.
The spatial light modulator 30 is disposed such that the reflection control section 30A is located on a vertical plane orthogonal to the optical axis Ax at the rear focal point F of the projection lens 72. At this time, the central axis Ax1 of the reflection control unit 30A extends in the cell front-rear direction at a position shifted to the upper side with respect to the optical axis Ax.
Further, the spatial light modulator 30 is formed in the following structure: by controlling the angles of the reflection surfaces of the plurality of reflection elements 30As constituting the reflection control unit 30A, the directions of reflection of the light from the light sources 52 reaching the respective reflection elements 30As can be selectively switched. Specifically, a first angular position at which light from each light source 52 is reflected in a direction toward the optical path R1 of the projection lens 72 (the direction indicated by a solid line in the figure) and a second angular position at which the light is reflected in a direction toward the optical path R2 (the direction indicated by a two-dot chain line in the figure) away from the projection lens 72 (i.e., in a direction not adversely affecting the formation of the light distribution pattern) are selected.
Fig. 6 shows a detailed configuration of the reflection control section 30A, and is a detailed view of a main part of fig. 5.
As shown in fig. 6, each of the reflection elements 30As constituting the reflection control unit 30A is configured to be rotatable about a horizontal axis extending in the left-right direction, and in a first angular position, the reflection element is rotated downward by a predetermined angle (for example, about 12 °) with respect to a vertical plane orthogonal to the central axis Ax1 of the reflection control unit 30A, and reflects the reflected light from the reflector 54 (see fig. 5) toward the front of the cell As slightly upward light (light of the optical path R1), while in a second angular position, the reflection element is rotated upward by a predetermined angle (for example, about 12 °) with respect to a vertical plane orthogonal to the central axis Ax1, and reflects the reflected light from the reflector 54 toward the front of the cell As largely upward light (light of the optical path R2).
The first angular position and the second angular position are switched by controlling the current supply to electrodes (not shown) disposed near a member (not shown) that rotatably supports the respective reflection elements 30 As. In the neutral state where the current is not applied, the reflection elements 30As are arranged so that their reflection surfaces are coplanar with each other along a vertical plane perpendicular to the center axis Ax 1.
Fig. 6 shows a state in which the reflective element 30As located in the vicinity of the central axis Ax1 of the reflection control unit 30A is located at the first angular position, and the reflective element 30As located in the lower region thereof is located at the second angular position.
As shown in fig. 5, the support substrate 22 is disposed so as to extend along a vertical plane (i.e., a vertical plane orthogonal to the optical axis Ax and the central axis Ax 1) orthogonal to the unit front-rear direction, and a conductive pattern (not shown) is formed on the front surface thereof. The support substrate 22 supports the peripheral edge portion of the frame portion 30B of the spatial light modulator 30 from the unit rear side via the socket 26, whereby the spatial light modulator 30 is electrically connected to the support substrate 22.
The spatial light modulator 30 is supported from both sides in the unit front-rear direction by the vertical surface portion 40A of the bracket 40 and the heat sink 24 for the spatial light modulator.
The heat sink 24 for the spatial light modulator is arranged to extend along a vertical plane orthogonal to the front-rear direction of the cell, and has a front surface formed with a projection 24a projecting in a prism shape toward the front of the cell and a rear surface formed with a plurality of heat dissipating fins 24b for the spatial light modulator extending toward the rear of the cell. The heat sink 24 for the spatial light modulator abuts on the center portion of the frame portion 30B of the spatial light modulator 30 at the distal end surface of the protrusion portion 24 a.
A horizontally long rectangular opening 40Aa surrounding the transparent plate 30C of the spatial light modulator 30 is formed in the vertical surface portion 40A of the holder 40. The opening 40Aa has an inner peripheral surface shape chamfered so as to spread toward the unit front over the entire periphery thereof.
Further, on the rear surface of the vertical surface portion 40A of the bracket 40, protruding portions 40Ab protruding in a columnar shape toward the unit rear are formed at three positions surrounding the opening portion 40Aa, and further, on the outer peripheral side thereof, an annular flange portion 40Ac protruding toward the unit rear is formed to extend in a horizontally long rectangular shape.
In the vertical surface portion 40A of the bracket 40, the front end surfaces of the three protrusion portions 40Ab contact the front surface of the frame portion 30B of the spatial light modulator 30, and at this time, the annular flange portion 40Ac covers the spatial light modulator 30 over the entire circumference.
Fig. 7 is a detailed view of section VII of fig. 1.
As shown in fig. 7, the support substrate 22 is mounted with a first connector 62A, and the control substrate 60 is mounted with a second connector 62B. The first connector 62A is disposed in a state of being opened downward at a lower end portion of the front surface of the support substrate 22, and the second connector 62B is disposed in a state of being opened downward at a lower end portion of the rear surface of the control substrate 60.
At this time, the control board 60 is formed to extend downward longer than the support board 22, and the second connector 62B is located below the first connector 62A.
In the opening 62Aa of the first connector 62A, the plurality of metal terminals 62Ab are arranged in the left-right direction, and in the opening 62Ba of the second connector 62B, the plurality of metal terminals 62Bb are arranged in the left-right direction.
The flexible printed wiring board 64 is disposed below the support substrate 22 and the control substrate 60. At this time, the flexible printed wiring board 64 is disposed so as to extend in a U-shape when viewed from the side of the unit, and both ends thereof are inserted into the openings 62Aa and 62Ba of the first connector 62A and the second connector 62B from below.
The flexible printed wiring board 64 is formed in, for example, the following structure: a plurality of conductive lines (specifically, signal lines and ground lines) 66 are formed as conductive patterns on the surface of a base film made of polyimide. In the flexible printed wiring board 64, both end portions thereof are inserted into the openings 62Aa and 62Ba of the first connector 62A and the second connector 62B, so that the conductive wires 66 are electrically connected to the metal terminals 62Ab and 62 Bb.
As shown in fig. 1, an electromagnetic shield cover 90 for protecting the spatial light modulator 30 from electromagnetic interference due to repetition of turning on and off the light source 52 is disposed on the unit rear side of the bracket 40. The electromagnetic shield 90 is made of metal (for example, steel), and is fixed to the vertical surface portion 40A of the bracket 40 by screw fastening or the like in a state of being arranged so as to cover the spatial light modulation unit 20 and the control substrate 60 from the unit rear side. Although the electromagnetic shield 90 constitutes a part of the lamp unit 10, the lamp unit 10 is shown in fig. 2 to 4 with the electromagnetic shield 90 removed.
Next, a specific configuration of the lens side subassembly 70 will be explained.
As shown in fig. 1, the projection lens 72 is composed of a first lens 72A, a second lens 72B, and a third lens 72C arranged in the unit front-rear direction on the optical axis Ax.
The first lens 72A located closest to the front side of the cell is configured as a plano-convex lens bulging toward the front of the cell, the second lens 72B located at the center is configured as a biconcave lens, and the third lens 72C located closest to the rear side of the cell is configured as a biconvex lens.
The first lens 72A, the second lens 72B, and the third lens 72C are each formed of a resin lens. Specifically, the first lens 72A and the third lens 72C are made of acrylic resin, and the second lens 72B is made of polycarbonate resin.
The first lens 72A, the second lens 72B, and the third lens 72C each have a rectangular outer peripheral shape when viewed from the front of the unit, and are supported by a common lens holder 74 on both right and left sides of the outer peripheral edge.
The lens holder 74 is a metal member (for example, made of aluminum die cast) and is formed to surround the projection lens 72 cylindrically in a rectangular sectional shape.
In the lens holder 74, the first metal piece 76A is attached from the unit front side, and the second metal piece 76B is attached from the unit rear side, whereby the first lens 72A, the second lens 72B, and the third lens 72C are fixed to the lens holder 74. At this time, the first metal piece 76A is fitted to the outer circumferential surface side of the lens holder 74, and the second metal piece 76B is fitted to the inner circumferential surface side of the lens holder 74.
As shown in fig. 2, a pair of left and right flange portions 74a are formed at the rear end portion of the lens holder 74. The lens holder 74 is fixed to the vertical surface portion 40A of the bracket 40 by screw fastening at each flange portion 74 a.
A lower protrusion 74b protruding downward is formed in a rear region of the lower surface wall of the lens holder 74. The lower protruding portion 74B has a lower surface shape along the horizontal surface shape and the outer peripheral surface shape of the inclined surface shape of the shelf portion 40B of the bracket 40. The lens holder 74 is fixed to the vertical surface portion 40A of the bracket 40 in a state where the lower protruding portion 74B thereof is placed on the shelf portion 40B of the bracket 40.
Since the optical axis Ax of the projection lens 72 is displaced downward with respect to the central axis Ax1 of the reflection control unit 30A of the spatial light modulator 30, the light reaching the projection lens 72 from the reflection control unit 30A is irradiated from the projection lens 72 toward the front of the cell as light slightly downward with respect to the horizontal direction, thereby forming a light distribution pattern for drawing a road surface on the road surface ahead of the vehicle.
Fig. 8 is a perspective view showing a light distribution pattern formed on a virtual vertical screen arranged at a position 25 m ahead of the vehicle by irradiation light from the vehicle lamp 10.
The light distribution pattern shown in fig. 8 is a light distribution pattern PA for road surface drawing, and is formed together with a light distribution pattern PL for low beam formed by irradiation light from another vehicle lamp, not shown.
Before describing the light distribution pattern PA for road surface drawing, the light distribution pattern PL for low beam is described.
The low-beam light distribution pattern PL is a low-beam light distribution pattern for left light distribution, and has cutoff lines CL1, CL2 at its upper end edge.
In the cutoff lines CL1 and CL2, the opposite vehicle-line side portion on the right side of the V-V line passing through the extinction point H-V in the front direction of the lamp in the vertical direction is formed as a horizontal cutoff line CL1, the vehicle-line side portion on the left side of the V-V line is formed as an inclined cutoff line CL2, and the elbow point E at the intersection of the two is located below about 0.5 to 0.6 ° of H-V.
The light distribution pattern PA for road surface drawing is a light distribution pattern for performing road surface drawing for promoting attention to the surroundings, and is formed as a light distribution pattern for drawing characters, marks, and the like on a road surface ahead of the vehicle. The road surface drawing light distribution pattern PA shown in fig. 8 is formed as an arrow-shaped light distribution pattern that faces the vehicle front direction.
The light distribution pattern PA for road surface drawing is formed by directing the reflected light from some of the plurality of reflection elements 30As (for example, the reflection elements 30As located in the region set in the arrow shape) constituting the reflection control unit 30A of the spatial light modulator 30 toward the projection lens 72.
When the vehicle is traveling at night, the formation of the arrow-shaped light distribution pattern PA for road surface drawing promotes, for example, notification to the surroundings and attention to the approach of the own vehicle to an intersection ahead of the vehicle.
A region Z1 indicated by a two-dot chain line in fig. 8 indicates a range in which various road surface drawing light distribution patterns PA can be formed. The region Z1 is a rectangular region centered on the line V-V, and has its upper edge located in the vicinity of and below the line H-H passing through the line H-V in the horizontal direction.
Next, the operation of the present embodiment will be explained.
Since the lamp unit 10 according to the present embodiment is configured to irradiate the light from the light source 52 reflected by the spatial light modulator 30 toward the front of the unit via the projection lens 72 (optical member), various light distribution patterns PA for road surface drawing can be formed with high accuracy by controlling the spatial distribution of the reflected light in the spatial light modulator 30.
In addition to the above, the lamp unit 10 includes: a support substrate 22 that supports the spatial light modulator 30 in an electrically connected state with the spatial light modulator 30; a control substrate 60 that controls the spatial light modulator 30; and a flexible printed wiring board 64 electrically connecting the support substrate 22 and the control substrate 60, in which case the control substrate 60 is disposed so as to face the support substrate 22 at a position on the unit rear side of the support substrate 22, and therefore the following operational effects can be obtained.
That is, by configuring the control board 60 to face the support board 22 at a position on the unit rear side of the support board 22, the lamp unit 10 can be configured to be more compact than a configuration in which the control board 60 is configured to be disposed in a positional relationship not to overlap the support board 22 when viewed from the front of the unit.
As described above, according to the present embodiment, in the lamp unit 10 including the reflective spatial light modulator 30, it is possible to form various light distribution patterns PA for road surface drawing with a compact configuration. This makes it possible to easily tilt the lamp unit 10 and adjust the optical axis thereof.
In this case, in the present embodiment, since the control board 60 is disposed so as to extend parallel to the support board 22, the lamp unit 10 can be configured to be more compact.
In the present embodiment, the support substrate 22 supports the peripheral edge portion of the spatial light modulator 30 from the cell rear side, and the spatial light modulator heat sink 24 is disposed in contact with the central portion of the spatial light modulator 30 at a position on the cell rear side of the support substrate 22, and the control substrate 60 is disposed on the cell rear side of the spatial light modulator heat sink 24.
That is, the heat sink 24 for the spatial light modulator in contact with the central portion thereof can efficiently dissipate heat generated by the spatial light modulator 30. In addition to the above, the flexible printed wiring board 64 can be easily disposed by configuring the control board 60 to be disposed on the cell rear side of the heat sink 24 for the spatial light modulator.
Further, in the present embodiment, since the first connector 62A is mounted on the support substrate 22 and the second connector 62B is mounted on the control substrate 60, and both end portions of the flexible printed wiring board 64 are inserted into the first connector 62A and the second connector 62B, the support substrate 22 and the control substrate 60 can be electrically connected easily.
At this time, since the first connector 62A is opened downward at the lower end portion of the support substrate 22 and the second connector 62B is opened downward at the lower end portion of the control substrate 60, even if moisture adheres to the flexible printed wiring board 64, the moisture is prevented from flowing down the flexible printed wiring board 64 and entering the inside of the first connector 62A and the second connector 62B.
In the above embodiment, the case where the lamp unit 10 is a vehicle-mounted lamp unit has been described, but the lamp unit may be used for applications other than vehicle-mounted applications (for example, applications such as a street lamp unit configured to draw a road surface from a direction directly above).
Next, a modified example of the above embodiment will be explained.
Fig. 9 is a side sectional view showing a vehicle lamp 200 including the lamp unit 110 according to the present modification.
The basic configuration of this modification is the same as that in the case of the above embodiment, but the arrangement of the control board 60 is different from that in the case of the above embodiment.
That is, in the present modification, the following configuration is adopted: the support substrate 22 is disposed to extend along a vertical plane orthogonal to the unit front-rear direction, but the control substrate 60 is disposed in a more or less tilted-back state without being parallel to the support substrate 22.
In the present modification, the support substrate 22 and the control substrate 60 are electrically connected to each other via the flexible printed wiring board 164.
Even in the case of the configuration of the present modification, the same operational effects as those in the case of the above-described embodiment can be obtained.
In the present modification, the lower end portion of the control board 60 is closer to the lower end portion of the support board 22 than in the case of the above-described embodiment, and therefore the flexible printed wiring board 164 can be formed in a shorter size than the flexible printed wiring board 64 of the above-described embodiment.
In the above-described embodiment and the modifications thereof, the numerical values shown as specifications are merely examples, and it is needless to say that these values may be set to different values as appropriate.
The present invention is not limited to the configurations described in the above embodiments and modifications thereof, and various modifications may be made thereto.

Claims (5)

1. A lamp unit is provided with: a light source; a spatial light modulator that reflects light from the light source; and an optical member that irradiates the light reflected by the spatial light modulator toward the front of the lamp unit,
the lamp unit includes: a support substrate that supports the spatial light modulator in an electrically connected state with the spatial light modulator; a control substrate that controls the spatial light modulator; and a flexible printed wiring board electrically connecting the support substrate and the control substrate,
the control board is disposed to face the support board at a position behind the lamp unit with respect to the support board.
2. The luminaire unit of claim 1,
the control substrate is disposed so as to extend parallel to the support substrate.
3. Lamp unit according to claim 1 or 2,
the support substrate supports a peripheral edge portion of the spatial light modulator from a lamp unit rear side,
a heat sink is disposed behind the lamp unit with respect to the support substrate, the heat sink being in contact with a central portion of the spatial light modulator,
the control board is disposed on the rear side of the lamp unit with respect to the heat sink.
4. Lamp unit according to claim 1 or 2,
a first connector is mounted on the support substrate,
a second connector is mounted on the control board,
both end portions of the flexible printed wiring board are inserted into the first connector and the second connector.
5. The luminaire unit of claim 4,
the first connector is opened downward at a lower end portion of the support substrate,
the second connector is opened downward at a lower end portion of the control substrate.
CN202010858268.4A 2019-09-02 2020-08-24 Lamp unit Pending CN112443810A (en)

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EP4328483A1 (en) * 2022-08-25 2024-02-28 ZKW Group GmbH Method for automatically assembling a light module for a motor vehicle headlight

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CN109073191A (en) * 2016-03-03 2018-12-21 Zkw集团有限责任公司 The structure member shell of automobile front lamp
JP2018037323A (en) * 2016-09-01 2018-03-08 スタンレー電気株式会社 Vehicular headlight device
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Application publication date: 20210305