CN212361913U - Vehicle lamp - Google Patents

Vehicle lamp Download PDF

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Publication number
CN212361913U
CN212361913U CN202021408056.8U CN202021408056U CN212361913U CN 212361913 U CN212361913 U CN 212361913U CN 202021408056 U CN202021408056 U CN 202021408056U CN 212361913 U CN212361913 U CN 212361913U
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CN
China
Prior art keywords
straight line
line
light
transparent cover
projection lens
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Active
Application number
CN202021408056.8U
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Chinese (zh)
Inventor
本多贵彦
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Koito Manufacturing Co Ltd
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Koito Manufacturing Co Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/25—Projection lenses
    • 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
    • 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]
    • F21S41/143—Light emitting diodes [LED] the main emission direction of the LED being parallel 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
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps 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
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
    • F21S41/32—Optical layout thereof
    • F21S41/36—Combinations of two or more separate reflectors
    • 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
    • F21S41/50—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by aesthetic components not otherwise provided for, e.g. decorative trim, partition walls or covers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/60—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution
    • F21S41/67—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on reflectors
    • F21S41/675—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on reflectors by moving reflectors
    • 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
    • F21S45/70—Prevention of harmful light leakage
    • 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
    • F21V3/00—Globes; Bowls; Cover glasses
    • F21V3/04—Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings
    • F21V3/06—Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings characterised by the material
    • 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
    • F21V33/00—Structural combinations of lighting devices with other articles, not otherwise provided for
    • 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
    • F21V33/00—Structural combinations of lighting devices with other articles, not otherwise provided for
    • F21V33/0004—Personal or domestic articles
    • F21V33/0052—Audio or video equipment, e.g. televisions, telephones, cameras or computers; Remote control devices therefor
    • 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
    • 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

Landscapes

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

Abstract

The utility model provides a lamp for vehicle has alleviateed the glare that the fresnel reflection on translucent cover part surface arouses. The vehicle lamp includes a digital micromirror device DMD, a transparent cover member covering the DMD, a reflector condensing light toward the DMD, and a projection lens. A straight line connecting a point on the surface of the transparent cover member and an end of the incident surface of the projection lens is defined as a first straight line, a straight line symmetrical to the first straight line with respect to a normal line of the transparent cover member passing through the point is defined as a second straight line, a straight line connecting a reference micromirror intersecting the normal line of the transparent cover member and an end of the incident surface of the projection lens is defined as a third straight line, and a straight line symmetrical to the third straight line with respect to the normal line of the reference micromirror in the ON state is defined as a fourth straight line. The reflector is configured such that the effective reflective surface is confined to an area between the second line and the fourth line.

Description

Vehicle lamp
Technical Field
The present invention relates to a vehicle lamp, and more particularly, to a vehicle lamp using a Digital Micromirror Device (DMD).
Background
There is known a vehicle lamp including a light source, a digital micromirror device for controlling light distribution by reflecting light from the light source, and a projection lens for projecting light from the digital micromirror device forward. The vehicle lamp forms a desired light distribution pattern by controlling the respective inclination angles of a plurality of micromirrors provided in a digital micromirror device.
Documents of the prior art
Patent document
Patent document 1: japanese laid-open patent publication No. 2016-110760
SUMMERY OF THE UTILITY MODEL
Problem to be solved by the utility model
In a vehicle lamp using a digital micromirror device, a transparent cover member may be disposed so as to cover the digital micromirror device in order to protect the micromirror. In this case, the light fresnel-reflected by the surface of the transparent cover member is projected forward of the lamp by the projection lens, and may cause glare to pedestrians or vehicles ahead.
The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a technique for reducing glare caused by fresnel reflection on the surface of a transparent cover member in a vehicle lamp using a digital micromirror device.
Means for solving the problems
In order to solve the above problem, according to an aspect of the present invention, there is provided a lamp for a vehicle, including: a digital micromirror device in which a plurality of micromirrors whose tilt angles can be individually controlled are arranged in an array; a transparent cover component configured to cover the digital micromirror device; a condenser condensing light from the light source toward the digital micromirror device; and a projection lens which projects the reflected light from the digital micromirror device toward the front of the lamp. The micromirror is switchable between a first inclined state in which the light from the condenser is reflected toward the projection lens and a second inclined state in which the light from the condenser is reflected toward a position away from the projection lens, and the condenser is arranged such that the effective optical surface of the condenser is limited to a region between a first straight line and a fourth straight line when a straight line connecting a point on the surface of the transparent cover member and an end of the incident surface of the projection lens is a first straight line, a straight line symmetrical to the first straight line with respect to a normal line of the transparent cover member passing through the point is a second straight line, a straight line connecting a reference micromirror intersecting with a normal line of the transparent cover member and an end of the incident surface of the projection lens is a third straight line, and a straight line symmetrical to the third straight line with respect to a normal line of the reference micromirror in the first inclined state is a fourth straight line.
The reference micromirror may be a micromirror located at the center among the plurality of micromirrors arranged in an array.
Alternatively, the condenser is a reflector that reflects light from the light source toward the digital micromirror device, and an effective reflective surface of the reflector is confined to a region between the second line and the fourth line.
Alternatively, the condenser may be a lens that condenses light from the light source toward the dmd, and an effective lens surface of the lens may be limited to a region between the second line and the fourth line.
Effect of the utility model
According to the present invention, in a vehicle lamp using a digital micromirror device, glare caused by fresnel reflection on the surface of a transparent cover member can be reduced.
Drawings
Fig. 1 is a vertical cross-sectional view showing a schematic configuration of a vehicle lamp according to an embodiment of the present invention.
Fig. 2 is a schematic diagram for explaining an optical system of a vehicle lamp according to an embodiment of the present invention.
Fig. 3 is a schematic diagram for explaining an optical system of a vehicle lamp according to another embodiment of the present invention.
Detailed Description
Hereinafter, a vehicle lamp according to an embodiment of the present invention will be described in detail with reference to the drawings. 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. The embodiments are merely examples and are not intended to limit the present invention, and all the features or combinations thereof described in the embodiments are not necessarily essential to the present invention.
Fig. 1 is a vertical cross-sectional view showing a schematic configuration of a vehicle lamp according to an embodiment of the present invention. The vehicle lamp 1 of the present embodiment is a vehicle headlamp apparatus having a pair of headlamp units disposed on the left and right sides in front of a vehicle. Since the pair of headlight units have substantially the same configuration except for the bilaterally symmetrical configuration, the configuration of one headlight unit is shown as a vehicle lamp 1 in fig. 1.
The vehicle lamp 1 includes a lamp body 2 having an opening on a vehicle front side, and a translucent cover 4 attached so as to cover the opening of the lamp body 2. The light-transmitting cover 4 is made of a light-transmitting resin, glass, or the like. A light source 10, a reflector 20, a digital micromirror device 30, a transparent cover member 35, a light absorbing member 40, and a projection lens 50 are housed in a lamp chamber 3 formed by a lamp main body 2 and a light-transmitting cover 4. Each component is attached to the lamp body 2 by a support mechanism not shown.
The light source 10 may also be an LED, a semiconductor laser, a valve, etc. The light source 10 is configured to irradiate light toward the reflector 20. The reflector 20 is a concave mirror, and functions as a condenser that condenses light from the light source 10 toward the digital micromirror device 30. The reflector 20 has a curved effective reflection surface 20 a. The reflector 20 reflects light from the light source 10 toward the digital micromirror device 30. The effective reflective surface 20a represents an effective optical surface of the reflector 20, i.e., a reflective surface of the reflector 20 that contributes to illumination of light to the plurality of micromirrors 32 that the digital micromirror device 30 has.
The digital micromirror device 30 includes a substrate 31 and a plurality of micromirrors arranged in an array on the substrate 31 (hereinafter, the three micromirrors 32a to 32c shown in fig. 1 are collectively referred to as "micromirrors 32"). The micromirrors 32 are configured to individually control the tilt angles.
Each micromirror 32 of the digital micromirror device 30 can be individually switched between a first tilt state (hereinafter, referred to as "on state") in which light from the reflector 20 is reflected toward the projection lens 50 located in front of the lamp and a second tilt state (hereinafter, referred to as "off state") in which light from the reflector 20 is reflected toward the light absorbing member 40 provided at a position offset from the projection lens 50 by changing its tilt angle in accordance with a control signal from the control section 60. By changing the tilt angle of each micromirror 32, a two-dimensional image can be projected in front of the lamp. For example, in fig. 1, the micromirror 32a located above is in an on state, and the micromirror 32c located below is in an off state. The micromirror 32b located at the center is in a non-tilt state (hereinafter, referred to as "neutral state"). The light L1 reflected by the micromirror 32a in the on state toward the front of the lamp is incident on the projection lens 50. On the other hand, the light L2 reflected by the micromirror 32c in the off state enters the light absorbing member 40 and is absorbed.
The transparent cover part 35 is configured to cover the digital micromirror device 30. The transparent cover member 35 is disposed at a predetermined distance from the micromirror 32 in order to secure the movable region of the micromirror 32. The transparent cover member 35 is a plate-like member made of a material transparent to the light emitted from the light source 10 (for example, a resin material such as glass, polycarbonate, or acryl), and is formed so as to cover the entire area of the digital micromirror device 30. In this way, the digital micromirror device 30 can be protected by covering the digital micromirror device 30 with the transparent cover member 35.
The projection lens 50 projects an image formed on a rear focal plane including the rear focal point F of the projection lens 50 onto a virtual vertical screen in front of the lamp as an inverted image. The projection lens 50 is configured such that its rear focal point F is located on the center of the light exit surface of the digital micromirror device 30 (i.e., the reflective surface of the micromirror 32b located at the center). Therefore, the projection lens 50 projects the image formed by the digital micromirror device 30 as an inverted image onto a virtual vertical screen in front of the lamp.
In the present embodiment, the control unit 60 adjusts the emission intensity of light from the light source 10 and controls the tilt angle of each micromirror 32 of the digital micromirror device 30. The control unit 60 is implemented as a hardware configuration by an element or a circuit including a CPU or a memory of a computer, and is implemented as a software configuration by a computer program or the like. In fig. 1, the control unit 60 is provided outside the lamp chamber 3, but may be provided inside the lamp chamber 3. The control unit 60 receives signals from an image processing device 61 connected to the imaging device 62, an optical switch not shown, and the like. The control unit 60 transmits various control signals to the light source 10 and the digital micromirror device 30 according to the received signals.
The camera 62 is configured to photograph the front of the luminaire. The image processing device 61 acquires image data captured by the imaging device 62 and performs image processing. Thus, the image processing device 61 identifies the vehicle, the pedestrian, the lane marker, and the like included in the image data, and detects the positions thereof. Since a technique for specifying them or a technique for detecting a position is a well-known technique, a detailed description is omitted here. The detected position information is sent to the control unit 60. Using the position information, the control unit 60 controls the tilt angle of the micromirror 32 to form a desired image on the digital micromirror device 30.
Fig. 2 is a schematic diagram for explaining the optical system 5 of the vehicle lamp 1 according to the embodiment of the present invention. In the vehicle lamp 1, since the transparent cover member 35 is disposed so as to cover the digital micromirror device 30, light directed from the reflector 20 toward the digital micromirror device 30 passes through the transparent cover member 35. When the light passes through, fresnel reflection occurs on the surface of the transparent cover member 35. When the light fresnel-reflected by the surface of the transparent cover member 35 enters the entrance surface 50a of the projection lens 50, the fresnel-reflected light is projected by the projection lens 50 to the front of the lamp, and may cause glare to pedestrians or oncoming vehicles. In the present embodiment, a method of reducing glare caused by fresnel reflection on the surface of the transparent cover member 35 is proposed.
In the present embodiment, by limiting the arrangement position of the reflector 20, fresnel reflection light on the surface of the transparent cover member 35 is prevented or at least suppressed from entering the incident surface 50a of the projection lens 50. The arrangement position of the reflector 20 will be described below.
As shown in fig. 2, a straight line connecting a point P1 on the surface of the transparent cover member 35 and the end 50b of the incident surface 50a of the projection lens 50 is defined as a "first straight line SL 1". A straight line that is line-symmetrical to the first straight line SL1 with respect to the normal NL1 of the transparent cover member 35 passing through the point P1 is referred to as a "second straight line SL 2". The angle formed by the first straight line SL1 and the normal NL1 is equal to the angle formed by the second straight line SL2 and the normal NL1 (denoted by α). The normal NL1 coincides with the optical axis Ax of the projection lens 50.
The micromirror intersecting the normal NL1 of the transparent cover member 35 is referred to as a "reference micromirror". In the present embodiment, the reference micromirror is the micromirror 32b positioned at the center among the plurality of micromirrors 32 arranged in an array. The straight line connecting the center of the surface of the reference micromirror 32b and the end 50b of the incident surface 50a of the projection lens 50 is referred to as a "third straight line SL 3". A line symmetrical to the third line SL3 with respect to the normal NL2 of the reference micromirror 32b in the on state is referred to as a "fourth line SL 4". The angle formed by the third line SL3 and the normal NL2 is equal to the angle formed by the fourth line SL4 and the normal NL2 (denoted by β). The angle γ formed by the normal NL1 and the normal NL2 is equal to the tilt angle of the micromirror 32b in the on state.
The reflector 20 is configured such that its effective reflection surface 20a is limited to a region AR1 (a region indicated by a hatching of a broken line in fig. 2) between the second straight line SL2 and the fourth straight line SL 4. "the effective reflection surface 20a is confined within the area AR 1" means that the end of the effective reflection surface 20a is located within the AR1 and is not exposed outside the area AR 1.
In this way, in the case where the reflector 20 is disposed so that the effective reflection surface 20a is limited to the area AR1 between the second straight line SL2 and the fourth straight line SL4, the fresnel reflection light on the surface of the transparent cover member 35 cannot geometrically enter the entrance surface 50a of the projection lens 50, or at least the entrance of the fresnel reflection light on the surface of the transparent cover member 35 to the entrance surface 50a of the projection lens 50 is suppressed. This can reduce glare caused by fresnel reflection on the surface of the transparent cover member 35.
Fig. 3 is a schematic diagram for explaining an optical system 55 of a vehicle lamp according to another embodiment of the present invention. This optical system 55 is different from the optical system 5 described above in that a lens 70 is used instead of the reflector 20. The lens 70 functions as a condenser that condenses light from the light source 10 toward the digital micromirror device 30. In addition, although one lens is shown in fig. 3, the lens 70 may be configured by a plurality of lenses.
In the optical system 55 of the present embodiment, the lens 70 is configured such that the effective lens surface 70a thereof is limited to the area AR1 (the area indicated by the hatching of the broken line in fig. 3) between the second straight line SL2 and the fourth straight line SL 4. The determination method of the area AR1 is the same as that explained in fig. 2. The phrase "the effective lens surface 70a is confined within the region AR 1" means that the end of the effective lens surface 70a is located within the AR1 and is not exposed outside the region AR 1. The effective lens surface 70a represents an effective optical surface of the lens 70, that is, an incident surface and an exit surface of the lens 70 that contribute to irradiation of light to the plurality of micromirrors 32 included in the digital micromirror device 30.
In this way, in the case where the lens 70 is disposed such that the effective lens surface 70a is limited to the area AR1 between the second straight line SL2 and the fourth straight line SL4, the fresnel reflected light on the surface of the transparent cover member 35 cannot geometrically enter the entrance surface 50a of the projection lens 50, or at least the entrance of the fresnel reflected light on the surface of the transparent cover member 35 into the entrance surface 50a of the projection lens 50 is suppressed. This can reduce glare caused by fresnel reflection on the surface of the transparent cover member 35.
In the case where the lens 70 is formed of a plurality of lenses, the effective lens surface of the lens closest to the digital micromirror device 30 may be limited to the area AR1 between the second straight line SL2 and the fourth straight line SL 4.
As described above, the present invention has been explained based on the embodiments. These embodiments are merely examples, and it will be understood by those skilled in the art that various modifications may be made to the combination of the constituent elements or the processing steps, and these modifications are also included in the scope of the present invention.
Description of the reference numerals
Vehicle lamp 1
2 Lamp body
3 Lamp chamber
4 light-transmitting cover
5. 55 optical system
10 light source
20 reflector
30 digital micromirror device
31 base plate
32 micro-mirror
35 transparent cover part
40 light absorbing component
50 projection lens
60 control part
61 image processing device
62 shooting device
70 lens

Claims (4)

1. A vehicle lamp is characterized by comprising:
a digital micromirror device in which a plurality of micromirrors whose tilt angles can be individually controlled are arranged in an array;
a transparent cover component configured to cover the digital micromirror device;
a condenser condensing light from a light source toward the digital micromirror device;
a projection lens for projecting the reflected light from the digital micromirror device to the front of the lamp;
the micromirrors being switchable between a first tilted state reflecting light from the condenser toward the projection lens and a second tilted state reflecting light from the condenser toward a position offset from the projection lens,
when a straight line connecting a point on the surface of the transparent cover member and an end of the incident surface of the projection lens is defined as a first straight line, a straight line symmetrical to the first straight line with respect to a normal line of the transparent cover member passing through the point is defined as a second straight line, a straight line connecting a reference micromirror intersecting the normal line of the transparent cover member and an end of the incident surface of the projection lens is defined as a third straight line, and a straight line symmetrical to the third straight line with respect to the normal line of the reference micromirror in the first tilt state is defined as a fourth straight line,
the concentrator is configured such that its effective optical surface is confined to the area between the second line and the fourth line.
2. The vehicular lamp according to claim 1,
the reference micromirror is a centrally located micromirror of the plurality of micromirrors arranged in an array.
3. The vehicular lamp according to claim 1 or 2,
the condenser is a reflector that reflects light from the light source toward the digital micromirror device,
the effective reflective surface of the reflector is confined to the area between the second line and the fourth line.
4. The vehicular lamp according to claim 1 or 2,
the condenser is a lens that condenses light from the light source toward the digital micromirror device,
the effective lens surface of the lens is limited to a region between the second straight line and the fourth straight line.
CN202021408056.8U 2019-07-17 2020-07-16 Vehicle lamp Active CN212361913U (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2019132177 2019-07-17
JP2019-132177 2019-07-17

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Publication Number Publication Date
CN212361913U true CN212361913U (en) 2021-01-15

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CN202010684595.2A Pending CN112240531A (en) 2019-07-17 2020-07-16 Vehicle lamp
CN202021408056.8U Active CN212361913U (en) 2019-07-17 2020-07-16 Vehicle lamp

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CN (2) CN112240531A (en)
WO (1) WO2021010460A1 (en)

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US9476561B2 (en) * 2012-06-29 2016-10-25 Koito Manufacturing Co., Ltd. Vehicle lamp including image forming device and method for controlling the same
JP5948194B2 (en) * 2012-09-13 2016-07-06 株式会社小糸製作所 Vehicle lamp control method and vehicle lamp
JP6214202B2 (en) * 2013-05-07 2017-10-18 株式会社小糸製作所 Lamp unit and light deflector
JP6259672B2 (en) * 2014-01-24 2018-01-10 株式会社小糸製作所 Vehicle lighting
JP2017134918A (en) * 2016-01-25 2017-08-03 スタンレー電気株式会社 Vehicular headlight device
AT519055B1 (en) * 2016-09-08 2018-06-15 Zkw Group Gmbh vehicle headlights
CN112240531A (en) * 2019-07-17 2021-01-19 株式会社小糸制作所 Vehicle lamp

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112240531A (en) * 2019-07-17 2021-01-19 株式会社小糸制作所 Vehicle lamp

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