CN114251630A - Vehicle lamp - Google Patents

Vehicle lamp Download PDF

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Publication number
CN114251630A
CN114251630A CN202111114417.7A CN202111114417A CN114251630A CN 114251630 A CN114251630 A CN 114251630A CN 202111114417 A CN202111114417 A CN 202111114417A CN 114251630 A CN114251630 A CN 114251630A
Authority
CN
China
Prior art keywords
lamp
road surface
vehicle
light source
light
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
CN202111114417.7A
Other languages
Chinese (zh)
Inventor
本多贵彦
伊东树生
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 CN114251630A publication Critical patent/CN114251630A/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
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/25—Projection lenses
    • 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
    • B60Q1/02—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor the devices being primarily intended to illuminate the way ahead or to illuminate other areas of way or environments
    • 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
    • B60Q1/34—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 for indicating change of drive direction
    • 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
    • F21S41/10—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
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/25—Projection lenses
    • F21S41/255—Lenses with a front view of circular or truncated circular outline
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/10—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the light source
    • F21S43/13—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
    • F21S43/10—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
    • F21S43/15—Strips of 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
    • 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
    • F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
    • F21S43/26—Refractors, transparent cover plates, light guides or filters not provided in groups F21S43/235 - F21S43/255
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F19/00—Advertising or display means not otherwise provided for
    • G09F19/12—Advertising or display means not otherwise provided for using special optical effects
    • G09F19/18—Advertising or display means not otherwise provided for using special optical effects involving the use of optical projection means, e.g. projection of images on clouds
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2102/00—Exterior vehicle lighting devices for illuminating purposes
    • F21W2102/10—Arrangement or contour of the emitted light
    • F21W2102/13—Arrangement or contour of the emitted light for high-beam region or low-beam region
    • F21W2102/135—Arrangement or contour of the emitted light for high-beam region or low-beam region the light having cut-off lines, i.e. clear borderlines between emitted regions and dark regions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2102/00—Exterior vehicle lighting devices for illuminating purposes
    • F21W2102/30—Fog lights
    • 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
    • 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
    • F21W2103/10—Position lights
    • 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
    • F21W2103/20—Direction indicator lights
    • 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
    • F21W2103/35—Brake lights
    • 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
    • F21W2103/55—Daytime running lights [DRL]
    • 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
    • F21Y2101/00—Point-like light sources
    • 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
    • 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
    • F21Y2115/20—Electroluminescent [EL] light sources
    • 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
    • F21Y2115/30—Semiconductor lasers

Abstract

Provided is a vehicle lamp having a road surface drawing function, which has both a function of a headlamp or a marker lamp and a road surface drawing function, and which has a simple structure. A vehicle lamp having a road surface drawing function includes an optical unit that realizes the function of a headlamp or a marker lamp and a road surface drawing unit that realizes the function of projecting a drawing pattern onto a road surface, and the optical unit and the road surface drawing unit are configured to irradiate with a common projection lens. Since both the light distribution and the drawing pattern are projected by a common lens, the configuration can be simplified.

Description

Vehicle lamp
Technical Field
The present invention relates to a vehicle lamp, and more particularly, to a vehicle lamp having a function of drawing a road surface in addition to a function of a headlamp or a marker lamp.
Background
In some vehicle lamps including an optical unit that realizes a function of a headlamp or a marker lamp, a road surface drawing unit that irradiates a desired drawing pattern to a road surface is also mounted together with the optical unit (for example, patent document 1).
Documents of the prior art
Patent document
Patent document 1: japanese patent laid-open publication No. 2016-37260
Disclosure of Invention
Problems to be solved by the invention
However, in the vehicle lamp of patent document 1, since both the optical unit that realizes the functions of the headlight and the marker lamp and the road surface drawing unit that irradiates a desired drawing pattern to the road surface are mounted in the same lamp chamber, the housing is large in size and the structure is complicated.
The present invention has been made in view of the above circumstances, and provides a vehicle lamp having a simple structure and a road surface drawing function.
Means for solving the problems
In order to solve the above-described problems, one aspect of the present disclosure provides a vehicle lamp having a road surface drawing function, which includes an optical unit that realizes the function of a headlamp or a marker lamp and a road surface drawing unit that realizes the function of projecting a drawing pattern onto a road surface, in addition to the function as a headlamp or a marker lamp, wherein the optical unit and the road surface drawing unit are irradiated with a common projection lens.
According to this aspect, by using a common projection lens, it is not necessary to use a projection lens for each unit, and the configuration is simple and space-saving.
In one aspect, the vehicle lamp is configured such that the optical unit is disposed near an optical axis of the projection lens, and the road surface drawing unit is disposed above the optical unit. In this aspect, the configuration is simplified by arranging the drawing pattern and the light distribution to be projected to a desired place.
In one aspect, the light source of the optical unit and the light source of the road surface drawing unit are mounted on a common substrate. Since the plurality of light sources are disposed on the common substrate, the number of components and the number of assembly steps can be reduced.
In one aspect, the optical unit includes a diffusion lens for forming a desired light distribution, and the diffusion lens and the light source of the road surface drawing unit are arranged on a substantially same vertical plane. According to this aspect, even if there are a plurality of light sources, the irradiation with each other is not hindered.
In one aspect, the optical unit and the road surface drawing unit are configured to perform irradiation for the purpose of irradiation. By associating the purpose, the functional effect is improved.
Effects of the invention
As is apparent from the above description, according to the present invention, it is possible to provide a vehicle lamp having a simple structure and a road surface drawing function.
Drawings
Fig. 1 is a schematic view of a vehicle mounted with a vehicle lamp according to a first embodiment. Fig. 1(a) is a plan view, and fig. 1(B) is a side view.
Fig. 2 is a longitudinal sectional view of the vehicle lamp.
Fig. 3 is a perspective view of the vehicular lamp. The housing is omitted.
Fig. 4 is an explanatory diagram depicting projection of a pattern. Fig. 4(a) is an optical path diagram depicting the light source 40. Fig. 4(B) is a plan view showing the drawing pattern projected onto the road surface.
Fig. 5 is an explanatory view of light distribution projection, showing light distribution projected from the optical unit onto a virtual screen at a predetermined position in front of the vehicle.
Fig. 6 is a longitudinal sectional view of the vehicle lamp of the second embodiment.
Fig. 7 is a perspective view of a vehicle lamp of the second embodiment.
Fig. 8 is a modification.
Fig. 9 is a modification.
Description of the reference numerals
Vehicle lamp 1
20 projection lens
30 light source for lamp
40 drawing light source
50 diffusion lens
Ax optical axis
L1, L2 light
LD1 light distribution
M1 depicts a pattern
Detailed Description
Hereinafter, specific embodiments of the present invention will be described with reference to the drawings. The embodiments do not limit the invention, but exemplify the invention, and all the features or combinations thereof described in the embodiments are not necessarily essential to the invention. In the drawings, each direction of the vehicle and the vehicle headlamp is defined as (upper: lower: left: right: front: rear: Up: Lo: Le: Ri: Fr: Re) with reference to a viewpoint of a driver in the vehicle.
(first embodiment)
Fig. 1 shows a vehicle C on which a vehicle lamp 1 according to a first embodiment is mounted.
As shown in fig. 1, the vehicle lamp 1 is a fog lamp mounted on a front portion of a vehicle C. The vehicle lamp 1 is provided under the headlight HL in a pair of left and right.
The vehicle lamp 1 is a headlamp (auxiliary lamp) that is turned on mainly when the vehicle C travels in snow or fog, and forms white or yellow diffused light as a light distribution LD1 of a fog lamp toward the front of the vehicle C to ensure the field of vision of the driver and make the driver or the like of the oncoming vehicle aware of the presence of the vehicle. When the vehicle C starts, the vehicle lamp 1 projects a linearly extending drawing pattern M1 formed by a three-connected rectangle on the road surface GR in front of the vehicle C as a notification display. Since the linear drawing patterns M1 are projected forward by the vehicle lamps 1 disposed on the left and right sides, the broken lines of the two parallel lights extending forward from the vehicle C are projected as the movement locus of the vehicle C. Thus, even in poor visibility severe weather such as heavy fog, the presence of the vehicle C and the travel route of the vehicle C are clarified to the third person such as a pedestrian or a driver of an oncoming vehicle existing in the travel direction, and attention is called. In order to enhance the effect of the attention calling, the drawing pattern M1 may be made to blink at a predetermined cycle.
As described above, the vehicle lamp 1 has a road surface drawing function of projecting the predetermined drawing pattern M1 onto the road surface GR, in addition to the function of the conventional headlamp such as the light distribution LD1 for irradiating the fog lamp.
In the present embodiment, the vehicle lamp 1 is a fog lamp, but the configuration of the present disclosure is not limited to the fog lamp, and may be used for a high beam, a low beam, and the like as a headlamp, and may be used for a tail lamp stop lamp, a daytime running lamp, a vehicle width lamp, a turn signal lamp, an automatic driving display lamp, and the like as a marker lamp.
The headlamps such as high beam and low beam define a light distribution at a predetermined distance, while the marker lamps define only the range that can be reached by the maximum luminous intensity and the left and right illumination angles. In the case of a headlamp or a marker lamp, the form of light emitted so as to satisfy a predetermined pattern defined as each vehicle lamp will be referred to as a light distribution.
(Structure of vehicle Lamp 1)
Next, the structure of the vehicle lamp 1 will be described. Fig. 2 is a vertical sectional view of the vehicle lamp 1. Fig. 3 is a perspective view of the vehicle lamp 1. In fig. 3, the housing is omitted.
As shown in fig. 2, the vehicle lamp 1 includes a lamp body 2, a cover 4, a fixing member 10, a projection lens 20, a lamp light source 30, a drawing light source 40, and a diffusion lens 50.
The lamp body 2 has an opening at the front, and a globe 4 made of translucent resin, glass, or the like is attached to the opening of the lamp body 2. The lamp body 2 and the shade 4 are a housing of the vehicle lamp 1, and a lamp chamber S is defined inside the lamp body 2 and the shade 4.
The fixing member 10 is a mounting member for the lamp light source 30, the drawing light source 40, the diffusion lens 50, and the projection lens 20, and the rear side is the heat sink 11. A hole 3 is provided in the center of the rear surface of the lamp body 2, and the fixing member 10 is fixed to the hole 3 in a state where a portion of the heat sink 11 housed in the lamp chamber S at the front side is exposed to the outside from the hole 3. The fixing member 10 is made of a metal member having high thermal conductivity, and heat generated by the lamp light source 30 and the drawing light source 40 is dissipated to the outside through the heat sink 11.
The drawing light source 40 and the lamp light source 30 emit light when energized. As the Light Emitting element, a semiconductor Light Emitting element such as an LED (Light Emitting Diode), an LD (Laser Diode), or an EL (Electro Luminescence) element, a Light bulb, an incandescent lamp (halogen lamp), a Discharge lamp (Discharge lamp), or the like can be used. In the present embodiment, LEDs that emit white light are used as the lamp light source 30 and the drawing light source 40. The drawing light source 40 is constituted by a plurality of light emitting elements (described in detail later).
A projecting portion 12 projecting forward is formed in the front upper portion of the fixing member 10, and the drawing light source 40 mounted on the substrate is mounted on an upper front surface 13 which is a front surface of the projecting portion 12 so that a light-emitting surface thereof is forward. Further, a lamp light source 30 is mounted on the lower front surface 14, which is the front surface below the fixing member 10, such that the light emitting surface is forward, and the lamp light source 30 is mounted on a substrate different from the drawing light source 40. Since the drawing light source 40 is attached to the projection 12, the projection length of the projection 12 is arranged forward of the lamp light source 30.
The diffusion lens 50 is a rectangular small diffusion lens having a back surface as an incident surface and a front surface as an exit surface. The diffuser lens 50 is provided in front of the lamp light source 30 via the holder 60, and causes the light emitted from the lamp light source 30 to enter from the entrance surface, to diffuse mainly in the left-right direction, and to exit from the exit surface. The diffusion lens 50 is an optical member for forming a light distribution pattern of the fog lamp. The holder 60 is attached at its front end side to the flange portions 51 provided at the upper and lower edge portions of the diffuser lens 50 and at its rear end side to the lower front surface 14 while avoiding the lamp light source 30, so as not to interfere with the functions of the diffuser lens 50 and the lamp light source 30.
The projection lens 20 is a lens in which at least one of the incident surface and the reflection surface has an aspherical shape. The projection lens 20 is disposed in front of the diffusion lens 50 and the drawing light source 40 via the holder 70, and projects light L2 emitted from the lamp light source 30 and diffused by the diffusion lens 50 and light L1 emitted from the drawing light source 40 to the front.
The vehicle lamp 1 includes an optical unit that realizes a function as a headlamp (fog lamp) and a road surface drawing unit that realizes a function of projecting a drawing pattern onto a road surface.
The road surface drawing unit is mainly composed of a drawing light source 40 and a projection lens 20, and light L1 emitted from the drawing light source 40 passes through the globe 4 via the projection lens 20 and is projected as a drawing pattern M1 onto a road surface GR in front of the vehicle C.
The optical unit is mainly composed of a lamp light source 30, a diffusion lens 50, and a projection lens 20, and light L2 emitted from the lamp light source 30 is diffused by the diffusion lens 50 to form a desired light distribution pattern, passes through the globe 4 via the projection lens 20, and is projected as a light distribution LD1 of a fog lamp to the front of the vehicle C.
(optical Unit and road surface drawing Unit)
The projection of the light distribution LD1 and the drawing pattern M1 by the optical unit and the road surface drawing unit will be described in detail with reference to fig. 4 and 5.
Fig. 4 is an explanatory diagram of projection of the drawing pattern M1 based on the optical unit. Fig. 4(a) is an optical path diagram of the light source 40 for drawing, and fig. 4(B) is a plan view showing a drawing pattern projected onto a road surface. Fig. 4(B) shows a drawing pattern projected from the vehicle lamp 1 mounted on the left side of the vehicle C, and the scale of the chart is the distance from the vehicle lamp 1 mounted on the left side of the vehicle C. The axis is based on the optical axis Ax of the projection lens 20 of the vehicle lighting device 1.
As shown in fig. 4, the drawing light source 40 includes a plurality of light emitting elements (LEDs) arranged in parallel in the vertical direction with the light emitting surface as the front surface. In the present embodiment, the drawing light source 40 includes three light emitting elements, i.e., the first light emitting element 41a, the second light emitting element 41b, and the third light emitting element 41c, but three or more light emitting elements may be provided.
All of the light emitting elements 41a, 41b, and 41c are formed of substantially square shapes having the same light emitting surface, and the light L1a, L1b, and L1c emitted from the light emitting elements 41a, 41b, and 41c are projected on the road surface GR as marks M1a, M1b, and M1c based on the light emitting surfaces, respectively. Since all of the light emitting elements 41a, 41b, and 41C are disposed above the optical axis Ax, the light emitted from the projection lens 20 is emitted downward from the horizontal plane and projected onto the road surface GR in front of the vehicle C. The light emitted from each light emitting element and incident on the projection lens is projected in a substantially square shape as a light emitting surface shape near the vehicle C as a downward angle (emission angle) from the horizontal is larger as the light emitted from the projection lens 20 is farther upward from the optical axis Ax, and conversely, the light is projected in a longer direction toward the front as the light is emitted from the projection lens 20 as the angle is smaller as the light is closer to the optical axis Ax.
That is, the light L1a emitted from the first light-emitting element 41a disposed above and farthest from the optical axis Ax is projected in the vicinity of the vehicle C (in the vicinity of 1M) via the projection lens 20 as a substantially square mark M1 a. Further, since the light L1a emitted from the second light emitting element 41b disposed below the first light emitting element 41a has an emission angle smaller than that of the light L1a, the light is projected as a substantially rectangular mark M1b which is distant (forward) from the mark M1a by a distance H1 in the projection direction (forward). Further, since the light L1c emitted from the third light emitting element disposed closest to the optical axis Ax has the smallest irradiation angle, it is projected as a linear mark M1c that extends forward by a distance H2 farther from the mark M1 b.
The light emitting elements 41a, 41b, and 41C are all disposed on a vertical plane including the optical axis Ax, and the marks M1a, M1b, and M1C are projected in a linear array in front of the vehicle C. The distance D1 between the first light emitting element 41a and the second light emitting element 41B and the distance D2 between the second light emitting element 41B and the third light emitting element 41c are adjusted so that the projected marks M1a, M1B, and M1c do not overlap, the distances H1 and H2 (see fig. 4B) are equal to each other, and the distance D1 > the distance D2 (see fig. 4 a) is determined by the difference in the emission angle.
With the above configuration, a dotted drawing pattern M1 formed of marks M1a, M1b, and M1c is projected on road surface GR. Since the marks M1a, M1b, and M1c are separated, the cognitive effect as road surface drawing is high. It is preferable that the light emitting elements 41a, 41b, and 41c are continuously lit to dynamically change the drawing pattern M1, thereby improving the effect of starting notification to the surroundings.
Fig. 5 is an explanatory view of projection of the light distribution LD1 by the optical unit. Fig. 5 shows a light distribution LD1 of a fog lamp on a virtual screen where light emitted from the lamp light source 30 is diffused by the diffusion lens 50 and projected to a predetermined position in front of the vehicle through the projection lens 20. The following description will be made with reference to fig. 2 and 5.
Since the lamp light source 30 is disposed slightly above the optical axis Ax of the diffuser lens 50, the light L2 incident on the diffuser lens 50 is emitted slightly obliquely below the horizontal plane. As described above, since the diffusion lens 50 diffuses light largely in the left-right direction, the screen light distribution projected onto the virtual screen is diffused at a wide angle in the left-right direction below the horizontal plane (line H of 0 degree in the up-down direction).
In order to form a light distribution satisfying the requirement, the diffusion lens 50 is configured in a rectangular shape that is long in the left-right direction, and is a light diffusion lens that diffuses greatly in the left-right direction. The rear focal point Fa of the projection lens 20 is set near the center of the emission surface of the diffusion lens 50, and the light distribution pattern formed by the diffusion lens 50 is projected as the light distribution LD1 of the fog lamp by the projection lens 20 to the front of the vehicle C.
As described above, the road surface drawing unit and the optical unit share the projection lens 20, and the light distribution LD1 and the drawing pattern M1 are projected forward of the vehicle C via the projection lens 20. By using the projection lens 20 common to both units without using a separate projection lens in each unit, space can be saved and the size of the vehicle lamp can be reduced.
The road surface drawing means of the present embodiment adjusts the shape and arrangement of the drawing light source 40 including the plurality of light emitting elements 41a to 41c, and forms and projects the drawing pattern M1 using the light emitting surfaces of the light emitting elements 41a to 41c, so that a member for forming the drawing pattern M1 is not necessary, and a desired drawing pattern M1 can be projected by lighting the drawing light source 40, and control is facilitated with a simple configuration. In addition, reducing the number of parts contributes to space saving.
In the formation of the drawing pattern projected on the road surface, the present embodiment is not limited thereto, and a light shielding portion having slits of a desired drawing pattern may be arranged in front of the light source to form the desired drawing pattern.
The rear focal point Fa of the projection lens 20 is located near the center of the emission surface of the diffusion lens 50, and the drawing light source 40 is arranged in a substantially vertical direction of the rear focal point Fa (see the two-dot chain line in fig. 2). This is to prevent the two light sources having different purposes from adversely affecting each other, and to prevent, for example, light emitted from the diffusion lens 50 from being blocked by the substrate of the drawing light source 40 and light from the drawing light source 40 from entering the diffusion lens 50 and emitting unwanted light by being arranged in the vertical direction.
Since the lamp light source 30 is disposed slightly above the optical axis Ax of the diffuser lens 50, the light distribution LD1 is projected to the front of the vehicle C toward slightly below the horizontal plane. The drawing light source 40 is disposed above the horizontal plane and projects downward from the horizontal plane. Since the light emitted from the projection lens 20 is emitted downward from the horizontal plane, glare is prevented. Further, the arrangement is adjusted so that the projection angle is increased, and the drawing pattern M1 is projected to a desired vicinity distance (about 1M to 10M) of the vehicle C. As described above, in the present embodiment, the number of overall components is reduced, the overall arrangement is compact, the space is saved, and the functionality is improved.
(second embodiment)
Next, a second embodiment will be described with reference to fig. 6 and 7. The same reference numerals are given to the portions having the same configurations as those of the first embodiment, and the description thereof is omitted. Fig. 6 is a longitudinal sectional view of the vehicle lamp 101 of the second embodiment. In fig. 6, the holding frame 60 to which the diffusion lens 50 is attached is omitted. Fig. 7 is a perspective view of the vehicle lamp 101. In fig. 7, the housing is omitted.
The vehicle lamp 101 includes a fixing member 110 to which the lamp light source 30, the drawing light source 40, the projection lens 20, and the diffusion lens 50 are attached. Unlike the fixing member 10 of the first embodiment, the fixing member 110 is not provided with the protruding portion 12, and the front surface thereof is an inclined surface 118 inclined at a predetermined angle from the front in the vertical direction. The lamp light source 30 and the drawing light source 40 are mounted on the inclined surface 118.
The projection lens 20 is disposed in front of the lamp light source 30 and the drawing light source 40, and is attached to the inclined surface 118 via the holder 70. Further, the diffusion lens 50 is disposed between the lamp light source 30 and the projection lens 20, and is attached to the inclined surface 118 via the holder 60. The flange 51 of the diffusion lens 50 extends from the left and right ends of the diffusion lens 50, and the holder 60 is disposed so as to sandwich the lamp light source 30 from the left and right sides, and does not interfere with the irradiation of the lamp light source 30.
According to the above configuration, since the road surface drawing means and the optical means are arranged substantially in the same manner as in the first embodiment, the same effects as in the first embodiment can be obtained. Here, since the lamp light source 30 and the drawing light source 40 are disposed on the same plane, they are mounted on the same substrate and the inclined surface 118. By mounting the lamp light source 30 and the drawing light source 40 on the same plane, both the lamp light source 30 and the drawing light source 40 can be mounted on a common substrate. By reducing the number of parts, the number of mounting steps can be reduced, and workability can be improved.
(modification example)
The preferred embodiments of the present invention have been described, but the present invention is not limited to the above-described configuration. Fig. 8 and 9 show modifications below.
Fig. 8 is a longitudinal sectional view of a vehicle lamp 1A as a modification of the vehicle lamp 1. In the vehicle lamp 1A, the lamp light source 30 is attached to the lower surface 19 of the protruding portion 12 so that the light emitting surface faces downward. A reflector 90 having an inner surface serving as a light reflecting surface is disposed below the lamp light source 30. The optical unit of the vehicle lamp 1A is constituted by the lamp light source 30, the reflector 90, and the projection lens 20. Light L2 emitted from the lamp light source 30 is reflected by the reflection surface of the reflector 90 to form a predetermined light distribution pattern, and is irradiated as a light distribution LD1 of a fog lamp via the projection lens 20 to the front of the vehicle C. As described above, other conventionally known configurations may be used for the configuration of the optical unit and the road surface drawing unit.
The road surface drawing means of the vehicle lamp 1A is disposed obliquely at the irradiation angle of the drawing pattern M1. That is, the drawing light source 40 (the upper front surface 13 for mounting) and the projection lens 20 are disposed so as to be inclined forward from the vertical direction by the irradiation angle. The optical axis Ax of the projection lens 20 is configured to pass through the drawing light source 40, and light emitted from the drawing light source 40 is projected onto the road surface GR as a drawing pattern M1 with a clearer outer shape.
Fig. 9 is a schematic plan view of a vehicle C on which a vehicle lamp 1B as a modification is mounted. The vehicle lamp 1B is a front turn signal lamp that is attached to the front portion of the vehicle C and functions as a marker lamp when changing the traveling direction to the left and right of the vehicle C. For example, when the vehicle C moves to the right, the vehicle lamp 1B attached to the right of the vehicle C forms amber diffused light toward the light distribution LD2 as a turn signal in front of the vehicle C, and blinks the amber diffused light, so that the driver of the oncoming vehicle, the driver of the vehicle on the traveling route, and the like know that the vehicle C moves to the right. Therefore, the light source 30 for the lamp of the optical unit of the vehicle lamp 1B uses an LED whose emission color is amber. At the same time, the vehicle lamp 1B projects a drawing pattern M1 formed of 3-by-3 rectangles on the road surface GR on the front right side, and causes pedestrians and the like present in the traveling direction to recognize the traveling path of the vehicle C, thereby giving attention.
The vehicle lamp 1B has a road surface drawing function in addition to a function as a conventional turn signal lamp, and both the illuminations are contents related to the purpose. Both the light distribution LD2 and the drawing pattern M1 are directed to the same purpose of "notifying the surrounding vehicle C of moving to the right and alerting the user", and the vehicle lamp 1B is directed to perform irradiation by associating the contents of both functions, thereby improving the functional effect.
Although the preferred embodiments of the present invention have been described above, the above embodiments are examples of the present invention, and they can be combined based on the knowledge of those skilled in the art, and such a mode is also included in the scope of the present invention.

Claims (5)

1. A vehicle lamp having a road surface drawing function, which has a road surface drawing function in addition to a function as a headlamp or a marker lamp, characterized in that,
the optical unit is used for realizing the functions of a headlamp or a marker lamp, and the road surface drawing unit is used for realizing the projection function of a drawing pattern to the road surface,
the optical unit and the road surface drawing unit are irradiated with a common projection lens.
2. A vehicle lamp having a road surface drawing function according to claim 1,
the optical unit is disposed in the vicinity of the optical axis of the projection lens, and the road surface drawing unit is disposed above the optical unit.
3. A vehicle lamp having a road surface drawing function according to claim 1 or 2,
the light source of the optical unit and the light source of the road surface drawing unit are mounted on a common substrate.
4. A vehicle lamp having a road surface drawing function according to any one of claims 1 to 3,
the optical unit is provided with a diffusion lens for forming a desired light distribution,
the diffusion lens and the light source of the road surface drawing unit are arranged on substantially the same vertical plane.
5. A vehicle lamp having a road surface drawing function according to any one of claims 1 to 4,
the optical unit and the road surface drawing unit perform irradiation associated with an irradiation purpose.
CN202111114417.7A 2020-09-23 2021-09-23 Vehicle lamp Pending CN114251630A (en)

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JP2020158411A JP2022052186A (en) 2020-09-23 2020-09-23 Vehicular lamp fitting
JP2020-158411 2020-09-23

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WO2024029622A1 (en) * 2022-08-05 2024-02-08 株式会社小糸製作所 Road surface drawing device for vehicle and road surface drawing method for vehicle

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CN107435882A (en) * 2016-05-27 2017-12-05 小丝电工株式会社 Lighting device
CN208606109U (en) * 2017-08-10 2019-03-15 株式会社小糸制作所 Lamps apparatus for vehicle
WO2019172148A1 (en) * 2018-03-07 2019-09-12 株式会社小糸製作所 Vehicle lamp fitting and vehicle lamp fitting system

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