WO2022215706A1 - 車両用灯具 - Google Patents
車両用灯具 Download PDFInfo
- Publication number
- WO2022215706A1 WO2022215706A1 PCT/JP2022/017165 JP2022017165W WO2022215706A1 WO 2022215706 A1 WO2022215706 A1 WO 2022215706A1 JP 2022017165 W JP2022017165 W JP 2022017165W WO 2022215706 A1 WO2022215706 A1 WO 2022215706A1
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- WIPO (PCT)
- Prior art keywords
- light
- vehicle
- slit
- irradiation pattern
- lens
- Prior art date
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Images
Classifications
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- 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
- B60Q1/38—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 using immovably-mounted light sources, e.g. fixed flashing lamps
- B60Q1/381—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 using immovably-mounted light sources, e.g. fixed flashing lamps with several light sources activated in sequence, e.g. to create a sweep effect
-
- 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
- B60Q1/22—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 for reverse drive
-
- 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
- B60Q1/50—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 other intentions or conditions, e.g. request for waiting or overtaking
- B60Q1/543—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 other intentions or conditions, e.g. request for waiting or overtaking for indicating other states or conditions of the vehicle
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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
- 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
- F21S43/26—Refractors, transparent cover plates, light guides or filters not provided in groups F21S43/235 - F21S43/255
-
- 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
- F21V5/00—Refractors for light sources
- F21V5/04—Refractors for light sources of lens shape
-
- 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
- B60Q2400/00—Special features or arrangements of exterior signal lamps for vehicles
- B60Q2400/50—Projected symbol or information, e.g. onto the road or car body
-
- 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
- B60Q2900/00—Features of lamps not covered by other groups in B60Q
- B60Q2900/40—Several lamps activated in sequence, e.g. sweep effect, progressive activation
-
- 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
- F21W2103/60—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
- 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]
Definitions
- the present disclosure relates to vehicle lamps.
- a vehicle lamp is considered to form an irradiation pattern having a plurality of irradiation patterns on the road surface around the vehicle (see, for example, Patent Document 1, etc.).
- This conventional vehicle lamp can form an irradiation pattern by projecting light from a light source through a slit of a shade (light shielding member), thereby informing the viewer of some intention.
- This conventional vehicular lamp efficiently utilizes the light from the light source by guiding the light from the light source to the shade through the light guide.
- the conventional vehicle lamp the light from the light source is diffused within the light guide to make the light distribution on the shade uniform, so it is difficult to adjust the light distribution on the shade. Therefore, it is difficult to obtain a desired light distribution for each irradiation pattern to be formed.
- the conventional vehicle lamp is provided with one projection lens (image projection lens), one shade, and one or more light sources for one irradiation pattern, the entire structure becomes large. .
- the present disclosure has been made in view of the above circumstances, and aims to provide a vehicle lamp capable of forming an irradiation pattern with a desired light distribution while suppressing an increase in size.
- a vehicular lamp includes a plurality of light sources, a condensing lens that receives light from the plurality of light sources from an incident surface and emits the light from an exit surface to condense the light, and A light-shielding member provided with a plurality of light-transmitting portions that partially transmit light; a projection lens that forms a projection lens, wherein the light source is provided corresponding to each of the translucent portions; It is characterized by
- the vehicle lamp of the present disclosure it is possible to form an irradiation pattern with a desired light distribution while suppressing an increase in size.
- FIG. 2 is an explanatory diagram showing a state in which a pair of vehicular lamps according to the first embodiment of the present disclosure are mounted on a vehicle and each forms an irradiation pattern;
- FIG. 2 is an explanatory diagram showing the configuration of a vehicle lamp;
- FIG. 3 is an explanatory diagram showing the configuration of the vehicle lamp viewed in a direction different from that in FIG. 2;
- FIG. 4 is an explanatory diagram showing the arrangement of each light source in the lamp for both vehicles;
- FIG. 4 is an explanatory view showing each slit portion of the shade in the lamp for both vehicles; It is an explanatory view showing a condensing lens.
- FIG. 1 is an explanatory diagram showing a state in which a pair of vehicular lamps according to the first embodiment of the present disclosure are mounted on a vehicle and each forms an irradiation pattern;
- FIG. 2 is an explanatory diagram showing the configuration of a vehicle lamp;
- FIG. 3 is an explanatory diagram showing the configuration of the
- FIG. 4 is an explanatory view showing how light from a first light source, which is incident from an axial incident surface portion and emitted from an inner exit surface portion on a cross section, travels in a first collective lens portion of a vehicle lamp provided on the right side of a vehicle; is.
- FIG. 8 is an explanatory diagram showing a light distribution (inner area) formed on the shade by the light shown in FIG. 7; In the first condenser lens portion of the vehicle lamp provided on the right side of the vehicle, the light from the first light source that enters from the inclined incident surface portion on the cross section, is reflected by the reflecting surface, and then exits from the outer exit surface portion travels. It is an explanatory view showing how to do.
- FIG. 8 is an explanatory diagram showing a light distribution (inner area) formed on the shade by the light shown in FIG. 7; In the first condenser lens portion of the vehicle lamp provided on the right side of the vehicle, the light from the first light source that enters from the inclined incident surface portion on
- FIG. 10 is an explanatory diagram showing a light distribution (outer region) formed on the shade by the light shown in FIG. 9;
- FIG. 10 is an explanatory diagram showing a light distribution (first region) formed on the shade by the light shown in FIG. 7 and the light shown in FIG. 9;
- FIG. 4 is an explanatory diagram showing an irradiation pattern formed on a screen orthogonal to a projection optical axis by a vehicle lamp provided on the right side of a vehicle;
- FIG. 4 is an explanatory view showing both irradiation patterns formed by a pair of vehicle lamps mounted on a vehicle according to the first embodiment, as seen from the periphery;
- FIG. 10 is an explanatory diagram showing a state in which a pair of vehicular lamps according to the second embodiment of the present disclosure are mounted on a vehicle and each forms an irradiation pattern;
- FIG. 10 is an explanatory diagram showing the arrangement of each light source in the both-vehicle lamp of Example 2;
- FIG. 10 is an explanatory diagram showing each slit portion of the shade in the both-vehicle lamp according to the second embodiment;
- FIG. 11 is an explanatory diagram showing a state of an irradiation pattern formed by a vehicle lamp mounted on a vehicle according to the second embodiment as viewed from the periphery;
- the vehicle lamp 10 is emphasized with respect to the vehicle 1 in order to facilitate understanding of how the vehicle lamp 10 is installed. does not match.
- the substrate 24 is omitted in order to facilitate understanding of the positional relationship of the light sources (21, 22, 23).
- FIGS. 4, 5, 15 and 16, the light sources 11 and 11A and the shades 13 and 13A of the vehicle lamps 10 and 10A provided in pairs on the left and right sides are viewed from a person who gets into the vehicle 1. They are arranged side by side according to the viewing direction.
- each area of each light source (21, 22, 23) and each slit portion 28 are formed.
- the substrate 24 and the shade frame portion 26 are omitted in order to make it easier to grasp the state of the lamp.
- 4, 5, 15, and 16, in order to facilitate understanding of the relationship between the position of each light source (21, 22, 23) and the position of each slit portion 28, the optical axis The state seen from the front side (projection lens 14 side) of the direction is shown.
- FIGS. 8, 10 and 11 in order to facilitate understanding of how the corresponding light source (21) irradiates the slit portion 28, the state seen from the light source side (rear side in the optical axis direction) is shown. showing.
- FIGS. 7 and 9 hatches showing cross sections of the condenser lens 12 (first condenser lens portion 31) are omitted in order to facilitate understanding of how light travels. 8, 10, 11, and 12, in each region (light distribution), the darker the color, the brighter it is.
- FIG. A vehicle lamp 10 of Example 1 is used as a lamp for a vehicle 1 such as an automobile, as shown in FIG. , and is provided at the rear of the vehicle 1 .
- the vehicular lamp 10 may also form the irradiation pattern Pi on the road surface 2 around the front and sides of the vehicle 1, and is not limited to the configuration of the first embodiment.
- each vehicle lamp 10 is arranged at a position higher than the road surface 2 at the rear end of the vehicle 1, and the projection optical axis Lp (see FIG. 2 etc.) is inclined with respect to the road surface 2.
- the two vehicular lamps 10 have basically the same configuration, except for the mounting position and the position where the irradiation pattern Pi is formed. Therefore, hereinafter, the configuration will be described by simply referring to the vehicle lamp 10 .
- the vehicular lamp 10 is provided on the right side and the left side of the vehicle 1 and is shown separately (including in the drawings), each reference number will be suffixed with R for the right side or L for the left side.
- the direction in which the projection optical axis Lp extends which is the direction in which light is emitted, is the optical axis direction (Z in the drawings), and the optical axis direction is along the horizontal plane.
- the vertical direction of is defined as the vertical direction (Y in the drawings), and the direction (horizontal direction) orthogonal to the optical axis direction and the vertical direction is defined as the width direction (X in the drawings) (see FIG. 2, etc.).
- the vehicle lamp 10 includes a light source unit 11, a condenser lens 12, a shade 13, and a projection lens 14 housed in a housing 15 to form a single projection optical system.
- a projector type road surface projection unit is constructed.
- the housing 15 is composed of a substantially semi-cylindrical lower member 15a and an upper member 15b. and the upper member 15b are fitted together.
- the housing 15 is provided with a condenser lens groove 15c into which the condenser lens 12 is fitted, a shade groove 15d into which the shade 13 is fitted, and a projection lens groove 15e into which the projection lens 14 is fitted.
- a fixing piece portion 15f is provided on the lower member 15a so as to protrude downward in the vertical direction.
- the fixing piece 15f is for attaching the housing 15 to a location at the rear end of the vehicle 1, and is fixed in the rear light in the first embodiment. It should be noted that the configuration such as the shape of the housing 15 and the location where the housing 15 is attached may be appropriately set, and are not limited to the configuration of the first embodiment.
- the light source unit 11 has a first light source 21, a second light source 22, a third light source 23, and a board 24 on which they are mounted.
- the three light sources (21, 22, 23) are composed of light emitting elements such as LEDs (Light Emitting Diodes).
- Each of the light sources (21, 22, 23) has basically the same configuration except that the mounting positions are different.
- white light white light
- the light sources (21, 22, 23) are not limited to the configuration of the first embodiment, and the color (wavelength band), distribution mode, number of colors, etc. may be appropriately set.
- these three light sources (21, 22, 23) are arranged vertically in parallel on a substrate 24 with a space therebetween.
- the third light source 23 of the first embodiment is positioned above the projection optical axis Lp in the vertical direction and slightly inside the projection optical axis Lp in the width direction (center side of the vehicle 1 in which it is mounted).
- the second light source 22 of Example 1 is positioned slightly above the projection optical axis Lp in the vertical direction and substantially directly above the projection optical axis Lp in the width direction.
- the first light source 21 of the first embodiment is positioned below the projection optical axis Lp in the vertical direction and slightly outside the projection optical axis Lp in the width direction (on the outer edge side of the vehicle 1 on which it is mounted). there is For this reason, the three light sources (21, 22, 23) have a positional relationship in which they are tilted outward from the third light source 23 toward the first light source 21 with respect to the vertical direction.
- the substrate 24 is mounted with three light sources (21, 22, 23) as shown in FIG.
- the board 24 is provided with a lighting control circuit, from which power is appropriately supplied to appropriately light the respective light sources (21, 22, 23).
- the substrate 24 is fixed to a heat sink made of die-cast aluminum or resin having thermal conductivity, and releases heat generated in the light source section 11 to the outside.
- the substrate 24 is fixed to the rear end of the housing 15 in a state of being fixed to the heat sink (the end on the right side in the optical axis direction when viewed from the front in FIGS. 2 and 3), and is accommodated in the housing 15. It faces the condensing lens 12 (its incident surface 34).
- the condenser lens 12 is a non-imaging lens that collects light emitted from the three light sources (21, 22, 23). 31 , a second condenser lens portion 32 and a third condenser lens portion 33 . Therefore, in Example 1, the vertical direction is the first direction in which the condensing lens portions (31, 32, 33) are stacked.
- the first condensing lens portion 31 is opposed to the first light source 21 in the optical axis direction (positioned on the emission optical axis of the first light source 21), and directs the light from the first light source 21 to the shade 13, which will be described later. Light is collected in the area where the 1-slit portion 281 is provided.
- the second condensing lens portion 32 is opposed to the second light source 22 in the optical axis direction (positioned on the output optical axis of the second light source 22), and directs the light from the second light source 22 to the shade 13, which will be described later. Light is collected in the area in which the 2-slit section 282 is provided.
- the third condensing lens portion 33 is opposed to the third light source 23 in the optical axis direction (positioned on the output optical axis of the third light source 23), and directs the light from the third light source 23 to the shade 13, which will be described later. Light is collected in the area where the 3-slit part 283 is provided.
- the condensing lens 12 is provided with mounting projections 12a on each of the upper and lower sides in the vertical direction. Both mounting projections 12a can be attached to the housing 15 by fitting the protruding ends thereof into the condenser lens grooves 15c of the housing 15. As shown in FIG. The optical configuration of each condensing lens section (31, 32, 33) will be described later.
- the shade 13 is an example of a light shielding member that partially passes light from the light sources (21, 22, 23) condensed by the condensing lens 12 to form the irradiation pattern Pi.
- the irradiation pattern Pi as shown in FIG. 1, three irradiation patterns Di are aligned in a direction away from the vehicle 1 at approximately equal intervals.
- the first irradiation pattern Di1 the one farthest from the vehicle 1
- the second irradiation pattern Di2 and the third irradiation pattern Di3 are arranged in order.
- the first irradiation pattern Di1 is a distant irradiation pattern
- the third irradiation pattern Di3 is a near irradiation pattern
- the second irradiation pattern Di2 is an intermediate irradiation pattern.
- the irradiation pattern Pi of the first embodiment is formed by dividing a fan shape having a vertex near the corner of the rear end of the vehicle 1 into three in the radial direction.
- the third irradiated pattern Di3 has a sector shape including the above-mentioned vertices, and the second irradiated pattern Di2 has an arch shape that curves along the outer edge of the third irradiated pattern Di3 at intervals.
- the pattern Di1 has an arch shape curved along the outer edge of the second irradiated pattern Di2 at intervals. Therefore, the three irradiation patterns Di are provided in the same angular range, and the first irradiation pattern Di1 is the largest and the third irradiation pattern Di3 is the smallest.
- This irradiation pattern Pi is positioned on the reference line Lb on which the inner ends of the irradiation patterns Di are equal to each other on the road surface 2 serving as the projection plane.
- This reference line Lb serves as a reference for the position where each irradiation pattern Di is provided, and extends along the direction of travel of the vehicle 1 at the position of each lateral side of the vehicle 1 in the left-right direction (direction orthogonal to the direction of travel). The width of the vehicle 1 is indicated between them.
- the irradiation pattern Pi is formed in a sector shape that spreads outward in the left-right direction from the reference line Lb, so that it spreads to the outside of the vehicle 1 in the left-right direction behind the vehicle 1 .
- the irradiation pattern Pi can be made to appear to point to the rear of the vehicle 1 by arranging three irradiation patterns Di.
- the irradiation pattern Pi of the first embodiment is lit in order from the irradiation pattern Di closer to the vehicle 1, that is, in the order of the third irradiation pattern Di3, the second irradiation pattern Di2, and the first irradiation pattern Di1, as will be described later. Therefore, it is possible to make it appear as if it spreads obliquely behind the vehicle 1. ⁇ An irradiation pattern Pi made up of these three irradiation patterns Di is formed by the shade 13 .
- the shade 13 has a shade portion 25 provided on a shade frame portion 26, as shown in FIGS.
- the shade frame portion 26 has a frame shape surrounding the shade portion 25 , and is attached to the housing 15 so as to be fitted into the shade groove 15 d of the housing 15 .
- the shade frame portion 26 of Example 1 is partially notched in the width direction at the upper and lower ends in the vertical direction.
- the shade frame portion 26 of the shade 13 is fitted into the shade groove 15d so that the center position of the shade portion 25 is positioned on the projection optical axis Lp.
- the shade part 25 is basically formed of a plate-shaped member that blocks the transmission of light, and is provided with an irradiation slit 27 that is partially cut out and penetrated through the member.
- the irradiation slit 27 partially passes the light from each light source (21, 22, 23) condensed by the condensing lens 12, thereby shaping the irradiation pattern Pi into a predetermined shape.
- the irradiation slit 27 corresponds to the irradiation pattern Pi, and is composed of three slit portions 28 in the first embodiment, as shown in FIG. Therefore, each slit portion 28 functions as a light transmitting portion that partially transmits light.
- the term "transmitting light” means passing light, including passing light through a gap in an object such as a slit and transmitting light like a filter.
- the three slit portions 28 correspond one-to-one to the three irradiation patterns Di. Since the projection lens 14 inverts the shade 13 (irradiation slit 27) and projects it onto the road surface 2, each slit portion 28 projects the projection optical axis Lp with respect to the positional relationship of each irradiation pattern Di of the irradiation pattern Pi. The positional relationship is rotationally symmetrical about the center (see FIGS. 1, 3, 5, etc.). Therefore, in each slit portion 28, the first slit portion 281 on the lowermost side in the vertical direction becomes a distant slit portion corresponding to the first irradiation pattern Di1 (distant irradiation pattern) of the irradiation pattern Pi.
- a second slit portion 282 thereon serves as an intermediate slit portion corresponding to the second irradiation pattern Di2 (intermediate irradiation pattern).
- the uppermost third slit portion 283 serves as a near slit portion corresponding to the third irradiation pattern Di3 (near irradiation pattern).
- a slit reference line Ls (light-transmitting portion reference line) is set in the shade portion 25 .
- This slit reference line Ls corresponds to the reference line Lb of the irradiation pattern Pi in each slit portion 28 (irradiation slit 27).
- the slit reference line Ls serves as a reference for the position where each slit portion 28 is provided, and the widthwise outer end portion of each slit portion 28 is provided thereon.
- the slit reference line Ls is inclined with respect to the vertical direction, and in the first embodiment, it is inclined from the inner side (center side of the vehicle 1) to the outer side in the width direction as it goes from the upper side to the lower side in the vertical direction. ing.
- each irradiation pattern Di has a desired positional relationship on the road surface 2 .
- the third slit portion 283 is provided above the projection optical axis Lp, and below it, in the vicinity of the horizontal line including the projection optical axis Lp, the second slit portion 283 is provided below the horizontal line.
- a slit portion 282 is provided, and a first slit portion 281 is provided below it.
- Each slit part 28 has the same shape as each corresponding irradiation pattern Di, and is vertically and horizontally reversed with respect to each irradiation pattern Di. That is, the third slit portion 283 has a sector shape, the second slit portion 282 has an arch shape curved along the outer edge of the third slit portion 283 at intervals, and the first slit portion 281 has an arcuate shape. The lower side of the second slit portion 282 has an arch shape that curves along the outer edge at intervals. Light passing through the shade 13 (each slit portion 28 of the irradiation slit 27 ) is projected onto the road surface 2 by the projection lens 14 .
- each slit portion 28 (each irradiation pattern Di which is light passing therethrough) has a size and an interval corresponding to the distance.
- the projection lens 14 is a lens for image formation, and is a substantially circular convex lens when viewed in the optical axis direction. As shown in FIGS. It is considered to be a free-form surface.
- the projection lens 14 forms an irradiation pattern Pi on the road surface 2 inclined with respect to the projection optical axis Lp by projecting the irradiation slit 27 (each slit portion 28 thereof) of the shade 13 (see FIG. 1, etc.).
- the entrance surface and the exit surface may be convex or concave as long as the projection lens 14 is a convex lens.
- this projection lens 14 When this projection lens 14 is fitted into the projection lens groove 15e of the housing 15, it is attached to the housing 15 in such a state that the projection lens optical axis coincides with the projection optical axis Lp. That is, the projection lens optical axis of the projection lens 14 becomes the projection optical axis Lp.
- the condensing lens 12 has a substantially rectangular shape elongated in the width direction when each of the condensing lens portions (31, 32, 33) is viewed from the front in the optical axis direction.
- a first condenser lens portion 31, a second condenser lens portion 32, and a third condenser lens portion 33 are stacked.
- the condensing lens 12 of Example 1 has a size (width direction and vertical direction) substantially equal to that of the shade portion 25 of the shade 13 when the condensing lens portions (31, 32, 33) are stacked. (Refer to FIG. 2, FIG. 3, etc.).
- the condensing lens 12 appropriately converges the light emitted from each light source ( 21 , 22 , 23 ), which spreads as a whole, onto the corresponding slit portion 28 (the periphery thereof) and advances to the shade portion 25 .
- the first condenser lens part 31 is the largest in the vertical direction, and the third condenser lens part 33 is the smallest.
- the condenser lens 12 has an incident surface 34 facing the light source section 11 and an exit surface 35 directed to the opposite side.
- the condenser lens 12 of Example 1 has an entrance surface 34 and an exit surface so that the light emitted from the light source unit 11, that is, the light sources (21, 22, 23), illuminates the slit portions 28 of the shade 13 appropriately.
- each condenser lens part ( 31 , 32 , 33 ) has an incident surface 34 and an exit surface 35 . settings are made.
- each of the condenser lens portions (31, 32, 33) has an entrance surface 34 and an exit surface 35. , and the basic concept of condensing light with respect to the slit portion 28 are the same. For this reason, the configuration and optical settings of the entrance surface 34 and the exit surface 35 will be described below using the first condenser lens portion 31 (31R) of the vehicle lamp 10 (10R) provided on the right side of the vehicle 1 as an example. The configuration and optical settings of the remaining second condenser lens section 32 and third condenser lens section 33 will be omitted.
- the incident surface 34 of the first condenser lens portion 31 has a central portion recessed toward the inside of the condenser lens 12 (on the side opposite to the light source portion 11), and an axial incidence surface portion that is convexly curved outward at the center. 36 and an oblique entrance surface portion 37 surrounding it.
- a truncated cone-shaped reflecting surface 38 surrounding the inclined incident surface portion 37 is provided around the incident surface 34 of the first condenser lens portion 31 .
- the on-axis entrance surface portion 36 is provided on the output optical axis so as to face the first light source 21 in the optical axis direction, and the first light source 21 is positioned near the rear focal point (rear focal point). .
- the on-axis incidence surface portion 36 converges the light emitted from the first light source 21 so as to travel toward an inner emission surface portion 41, which will be described later, of the incidence surface 34, and causes the light to enter the condensing lens 12 (FIG. 7). reference).
- the inclined incident surface portion 37 is provided so as to protrude toward the first light source 21 side, and causes light from the first light source 21 that does not travel to the axial incident surface portion 36 to enter the condenser lens 12 .
- the reflecting surface 38 is provided at a position where the light entering the condenser lens 12 from the inclined incident surface portion 37 travels.
- the reflecting surface 38 reflects the light incident from the inclined incident surface portion 37 and collects the light so as to travel toward the later-described outer emitting surface portion 42 of the incident surface 34 (see FIG. 9).
- the reflecting surface 38 may reflect light using total reflection, or may reflect light by adhering aluminum, silver, or the like by vapor deposition, painting, or the like. For these reasons, the incident surface 34 allows the light emitted from the first light source 21 to enter efficiently and guide the light to the emitting surface 35 .
- the condenser lens 12 the light that has passed through the axial incident surface portion 36 becomes direct light toward the exit surface 35 on the incident surface 34 , and the light that passes through the inclined incident surface portion 37 and is reflected by the reflecting surface 38 becomes After being internally reflected, it becomes reflected light that travels toward the exit surface 35 . Since the incident surface 34 in each of the condenser lens portions (31, 32, 33) of the condenser lens 12 is configured as described above, the light emitted from the corresponding light source (21, 22, 23) is efficiently It has functions that make it easy to use.
- the emission surface 35 emits the light incident from the incidence surface 34 forward in the front-rear direction.
- the output surface 35 of each condensing lens (31, 32, 33) has a substantially rectangular shape elongated in the width direction when viewed from the front, and has different optical settings. It has an inner exit surface portion 41 and an outer exit surface portion 42 .
- the inner exit surface portion 41 is provided in the vicinity of the center of the exit surface 35 and in a region where the light passing through the on-axis entrance surface portion 36 travels (see FIG. 7).
- the inner emission surface portion 41 of Example 1 has a substantially circular shape when viewed from the front.
- the inner emission surface portion 41 protrudes outward (on the side of the projection lens 14 (front side in the front-rear direction)) in the condenser lens 12 more than the outer emission surface portion 42 .
- the inner emission surface portion 41 refracts light that has passed through the on-axis incidence surface portion 36 so that it spreads in the width direction (horizontal direction) and travels forward in the front-rear direction.
- the inner emission surface portion 41 emits light from the first light source 21 through the on-axis incidence surface portion 36, and the first light emission surface portion 41 is positioned on the shade 13 (each slit portion 28 of the shade portion 25) according to the optical characteristics.
- a plurality of light distribution images of the light source 21 are appropriately overlapped and formed.
- This optical characteristic can be set by adjusting the curvature (surface shape) of the inner exit surface portion 41 together with the on-axis entrance surface portion 36 for each location, and is set by gradually changing the curvature in the first embodiment.
- the inner emission surface portion 41 irradiates the shade 13 with the light emitted from the first light source 21 and passed through the on-axis incidence surface portion 36 to form an inner area Ai shown in FIG.
- the inner region Ai includes the entire area of the first slit portion 281 to which the first condenser lens portion 31 (first light source 21) corresponds. In the inner area Ai, the entire first slit portion 281 has a substantially uniform amount of light.
- the outer emission surface portion 42 is provided in a region sandwiching the inner emission surface portion 41 in the width direction (outside the inner emission surface portion 41 in the width direction (see FIG. 6, etc.)), and as shown in FIG. 21 through the inclined incident surface portion 37 and reflected by the reflecting surface 38 .
- the outer emission surface portion 42 is located (recessed) on the inner side (rear side in the front-rear direction) of the condenser lens 12 relative to the inner emission surface portion 41 .
- the outer emission surface portion 42 refracts light from the first light source 21 that passes through the inclined incidence surface portion 37 and is reflected by the reflecting surface 38, thereby forming the first slit corresponding to the first condenser lens portion 31 (the first light source 21).
- the light is advanced forward in the front-rear direction so as to converge on a predetermined position (area) on the portion 281 .
- the outer emission surface 42 irradiates the light reflected by the reflection surface 38 to form a plurality of light distribution images of the first light source 21 that are appropriately superimposed on the shade 13 at positions according to the optical characteristics.
- This optical characteristic can be set by adjusting the curvature (surface shape) of the outer emission surface portion 42 together with the reflection surface 38 for each location, and in Example 1, these curvatures are set by gradually changing.
- the outer emission surface portion 42 irradiates the shade 13 with the light emitted from the first light source 21 and reflected by the reflection surface 38 through the inclined incidence surface portion 37 to form the outer area Ao shown in FIG.
- This outer area Ao partially brightens the predetermined position described above.
- This predetermined position is the position where the light from the first light source 21 that has passed through the inner emission surface portion 41 is positioned so that the first irradiation pattern Di1 formed on the road surface 2 by the light that has passed through the first slit portion 281 has a desired brightness.
- the outer area Ao of Example 1 is set from the viewpoint of ensuring the brightness in the vicinity of the reference line Lb in the irradiation pattern Pi, and the slit reference line Ls side on the first slit portion 281 is partially brightened.
- the outer area Ao is made brighter than the inner area Ai with the vicinity of the slit reference line Ls of the first slit portion 281 having the maximum light amount, and the area up to the intermediate position in the width direction of the first slit portion 281 is a bright area. .
- the first condenser lens portion 31 forms an inner area Ai that mainly brightens the entire area of the first slit portion 281 by the light that has passed through the inner emission surface portion 41 , and the light that has passed through the outer emission surface portion 42 .
- An outer region Ao is formed to brighten the vicinity of the slit reference line Ls of the 1-slit portion 281 .
- the first condenser lens portion 31 emits the light from the first light source 21 from the inner emission surface portion 41 and the outer emission surface portion 42 as described above, thereby forming the first area A1 shown in FIG. .
- the first area A1 is formed by superimposing the inner area Ai and the outer area Ao. ing.
- the second condenser lens part 32 and the third condenser lens part 33 basically have the same configuration as the first condenser lens part 31, and the first condenser lens
- the optical setting is made based on the same idea as that of the portion 31 . That is, the second condenser lens portion 32 forms an inner region that mainly brightens the entire area of the second slit portion 282 by the light from the second light source 22 that has passed through the inner emission surface portion 41, and has passed through the outer emission surface portion 42.
- the light from the second light source 22 forms an outer area centering around the vicinity of the slit reference line Ls of the second slit portion 282 .
- the second collective lens portion 32 emits the light from the second light source 22 from the inner emission surface portion 41 and the outer emission surface portion 42 as described above, so that the inner region and the outer region overlap each other. forming a second region;
- the second area is obtained by superimposing the inner area and the outer area, and while brightening the entire area of the second slit portion 282, the vicinity of the slit reference line Ls of the second slit portion 282 is brightest.
- the third condenser lens portion 33 forms an inner region that mainly brightens the entire area of the third slit portion 283 by the light from the third light source 23 that has passed through the inner emission surface portion 41, and has passed through the outer emission surface portion 42.
- the light from the third light source 23 forms an outer region around the slit reference line Ls of the third slit portion 283 .
- the third collective lens portion 33 emits light from the third light source 23 from the inner emission surface portion 41 and the outer emission surface portion 42 as described above, thereby overlapping the inner region and the outer region.
- the third area is obtained by superimposing the inner area and the outer area, and brightens the entire area of the third slit portion 283 while making the vicinity of the slit reference line Ls of the third slit portion 283 the brightest.
- the condensing lens 12 condenses the light from each light source (21, 22, 23) to make the vicinity of the slit reference line Ls in each slit 28 the brightest on the shade 13. , the entire area of each slit portion 28 can be brightened. In this way, the condenser lens 12 mainly brightens the entire area of the corresponding slit portion 28 by the light from each light source (21, 22, 23) that has passed through the inner emission surface portion 41, and each light that has passed through the outer emission surface portion 42. Light from the light sources (21, 22, 23) compensates for partial brightness in the corresponding slit section 28. FIG. Thereby, the condenser lens 12 has a function of making each slit portion 28 have a desired light distribution.
- the vehicular lamp 10 collects light from the condenser lens 12 (each condenser lens portion (31, 32, 33)) to the shade 13 (each slit portion 28 thereof).
- a plurality of light shielding plates 44 are provided in the optical path 43 .
- the condensing optical path 43 is an optical path through which the condensing lens 12 converges the light from each light source (21, 22, 23) onto the shade 13. As shown in FIG.
- the plurality of light shielding plates 44 are formed of plate-shaped members that block the transmission of light.
- the light shielding plate 44 partitions the condensing optical path 43 for each combination of each condensing lens portion (31, 32, 33) and the slit portion 28 corresponding thereto. That is, in the condensing optical path 43 , the light shielding plate 44 is located between the space from the first condensing lens portion 31 to the first slit portion 281 and the space from the second condensing lens portion 32 to the second slit portion 282 . is provided.
- the condensing optical path 43 the light shielding plate 44 is located between the space from the second condensing lens portion 32 to the second slit portion 282 and the space from the third condensing lens portion 33 to the third slit portion 283 . is provided.
- the condensing optical path 43 is formed by the two light shielding plates 44, the first optical path portion 43a from the first condensing lens portion 31 to the first slit portion 281, and the second slit from the second condensing lens portion 32. It is divided into a second optical path portion 43 b reaching the portion 282 and a third optical path portion 43 c extending from the third condenser lens portion 33 to the third slit portion 283 . Therefore, in the condensing optical path 43, the light from each condensing lens portion (31, 32, 33) can be prevented from traveling to the non-corresponding slit portion 28 (occurrence of so-called crosstalk).
- the vehicle lamp 10 is assembled as follows with reference to FIGS. First, the three light sources (21, 22, 23) are mounted on the substrate 24, and the light source section 11 is assembled. Further, in the lower member 15a of the housing 15, both mounting projections 12a of the condenser lens 12 are fitted into the condenser lens grooves 15c, the shade frame portion 26 of the shade 13 is fitted into the shade grooves 15d, and the projection lens groove 15e. The projection lens 14 is fitted in.
- the housing 15 is formed by fitting the upper member 15b to the lower member 15a.
- the light source unit 11 fixed to the heat sink is fixed.
- the vehicular lamp 10 is assembled with the condensing lens 12, the shade 13, and the projection lens 14 arranged in this order from the light source unit 11 side on the projection optical axis Lp in a predetermined positional relationship.
- This vehicular lamp 10 is provided in a lamp chamber of a reversing lamp in a state in which the projection optical axis Lp is oriented obliquely rearward outside the vehicle 1 and inclined with respect to the road surface 2 around the vehicle 1 (see FIG. 1). reference).
- the vehicle lamp 10 supplies electric power from the lighting control circuit to the light sources (21, 22, 23) from the substrate 24, thereby lighting and extinguishing them as appropriate.
- the light from each light source (21, 22, 23) is condensed by the condensing lens 12, illuminates the shade 13, passes through the irradiation slit 27 (each slit portion 28), and is projected by the projection lens 14.
- the irradiation pattern Pi is formed on the projection plane (the road surface 2 when mounted on the vehicle 1).
- the irradiation pattern Pi is obtained by projecting the light passing through the irradiation slit 27 (each slit portion 28 thereof) of the shade 13 having the light distribution described above by the projection lens 14, so that the inner edge is set to the reference line.
- Three illuminated patterns Di are arranged on Lb.
- FIG. 12 shows the irradiation pattern Pi formed on a screen perpendicular to the projection optical axis Lp.
- the irradiation pattern Pi of FIG. 12 unlike the case where the light is formed on the road surface 2 from the vehicle 1, the light distribution formed in each slit portion 28 by the condenser lens 12 is reflected substantially as it is.
- the entire area of each slit portion 28 is brightened, and the reference line Lb side (right side in front view) of each slit portion 28 is brightest.
- the vehicular lamp 10 forms this irradiation pattern Pi on the road surface 2, the brightness decreases according to the distance to each irradiation pattern Di due to the inclination with respect to the road surface 2 when the vehicle lamp 10 is provided.
- Each illuminated pattern Di has substantially uniform brightness over its entire area.
- the vehicular lamp 10 sets the light distribution in each slit portion 28 in consideration of the influence of the inclination with respect to the road surface 2 in order to obtain the desired light distribution of the irradiation pattern Pi on the road surface 2. do.
- each irradiation pattern Di the vicinity of the slit reference line Ls is brightened in each slit portion 28 (above the irradiation slit 27), so the outline of each slit portion 28 can be made clear. Therefore, even when the difference in brightness is smoothed out in each illuminated pattern Di, the difference in brightness in the vicinity of the reference line Lb to which the slit reference line Ls corresponds can be made clear, and the outline can be improved. It is possible to clearly grasp the position, and it is possible to make the part along the reference line Lb easy to see.
- the vehicle lamp 10 is interlocked with a back lamp, and when the vehicle 1 is in a reverse (backward) state (driving gear is reversed), the third light source 23, the second light source 22, and the first light source 21 are turned on, respectively. are lit in the order of At this time, once the third light source 23 and the second light source 22 are turned on, the lighting state is maintained, and at the same time when the last turned on first light source 21 is turned off.
- the two-vehicle lamps 10 light up in the order of the third irradiation pattern Di3, the second irradiation pattern Di2, and the first irradiation pattern Di1 on the road surface 2 behind the vehicle 1. to form an irradiation pattern Pi.
- the vehicle lamp 10 can be used even when people around the vehicle 1 cannot or cannot visually recognize the reverse light of the vehicle 1.
- the irradiation pattern Pi can be formed up to a distant position behind the vehicle 1, so that the irradiation pattern Pi can be visually recognized.
- the vehicular lamp 10 forms the irradiation pattern Pi by lighting the third irradiation pattern Di3, the second irradiation pattern Di2, and the first irradiation pattern Di1 in this order, so that the fact that the vehicle 1 is about to move backward can be instantly recognized. It is possible to make the driver grasp the position, and to call attention to the rear of the vehicle 1. ⁇
- each irradiation pattern Di of the left and right irradiation patterns Pi formed by the vehicle lamp 10 the inner end portions in the left-right direction of the vehicle 1 are aligned on the reference line Lb (see FIG. 1).
- a line Lb extends along the direction of travel of the vehicle 1 at positions on the left and right sides of the vehicle 1 . Therefore, the vehicular lamp 10 can make the width of the vehicle 1 visible to those around the vehicle 1 and to the driver or the like via an image from a camera or the like of the vehicle 1 . Therefore, for example, when the vehicle 1 is parked, the vehicle lamp 10 can be used to assist the parking of the vehicle 1 by using the irradiation pattern Pi.
- the condensing lens portions (31, 32, 33) corresponding to the light sources (21, 22, 23) that are turned on later are arranged in the first direction (vertical direction) in which they are overlapped. ), the size of each condensing lens is increased.
- the vehicular lamp 10 can compensate for the darkening of the illuminated pattern Di due to the difference in the distance formed by the difference in the amount of incident light, and the brightness of the illuminated patterns Di caused by the difference in distance. difference in height can be reduced.
- the vehicular lamp 10 adjusts the size of each condensing lens portion (31, 32, 33) in the condensing lens 12 to reduce the difference in brightness between the illumination patterns Di caused by the difference in distance. Therefore, it is possible to suppress an increase in size for reducing the difference in brightness. This is due to the following. First, if each illumination pattern Di is simply made brighter, the condenser lens 12, the shade 13, and the projection lens 14 should be made larger with respect to each light source (21, 22, 23). However, if each part (12, 13, 14) is enlarged in this way, the whole will be enlarged.
- each light source (21, 22, 23) can be It is conceivable to increase the amount of incident light from the However, if only each condensing lens portion is enlarged, the projection optical axis Lp in the direction toward the corresponding slit portion 28 of the shade 13 from the condensing lens portions (reference numerals 31 and 33 in the first embodiment) distant from the projection optical axis Lp the angle to the becomes larger.
- the condensing lens 12 is made to have substantially the same size as the shade 13 and the projection lens 14, and each condensing lens portion of the condensing lens 12 in the first direction (vertical direction)
- the ratio of (31, 32, 33) is increased as the lighting order of the light sources (21, 22, 23) is delayed. Therefore, the vehicular lamp 10 can reduce the difference in brightness between the illumination patterns Di caused by the difference in distance while suppressing the increase in size.
- the vehicular lamp 10 integrates the condensing lens portions (31, 32, 33) to form the condensing lens 12, it is possible to contribute to further miniaturization and to appropriately form each irradiation pattern Di. can.
- the size increases by the thickness of the adhesive, and the positioning of the condenser lens parts becomes difficult.
- the position or the like at which the irradiation pattern Di is formed may be affected.
- the condensing optical paths 43 from the condensing lens portions (31, 32, 33) to the corresponding slit portions 28 are partitioned by the light shielding plate 44 for each corresponding combination. Therefore, the vehicular lamp 10 can prevent the light from each of the condensing lens portions (31, 32, 33) in the condensing optical path 43 from proceeding to the non-corresponding slit portion 28.
- Each irradiation pattern Di, that is, the irradiation pattern Pi can be formed more clearly.
- the light sources (21, 22, 23) are provided so as to be inclined outward in the vertical direction from the third light source 23 toward the first light source 21, and each slit portion is provided.
- the slit reference line Ls corresponding to the reference line Lb of the irradiation pattern Pi is oriented from the inner side (center side of the vehicle 1) to the outer side in the width direction as it goes from the upper side to the lower side in the vertical direction. It is tilted.
- the vehicular lamp 10 arranges the light sources (21, 22, 23) with respect to the first direction (vertical direction) in which the condensing lens portions (31, 32, 33) are overlapped with the light shielding member ( 13) They are slanted on the side where the reference line Lb is slanted.
- the vehicular lamp 10 can have a positional relationship aimed at each irradiation pattern Di when projected onto the road surface 2 by the projection lens 14, and a desired irradiation pattern Pi can be formed on the road surface 2.
- the conventional vehicle lamp described in the prior art document has a plurality of light guides individually corresponding to a plurality of light sources, and efficiently uses the light from each light source.
- each light guide member diffuses the light inside and emits light with a substantially uniform light distribution. By irradiating with , the light distribution on the shade is made substantially uniform.
- the conventional vehicle lamp has a structure in which a shade is provided for each irradiation slit, and the light from the light source corresponding to each light guide is guided on the shade, so that each light source is guided onto a separate shade.
- the number of shades and light guides increases as the number of irradiation patterns as the irradiation pattern Pi increases, resulting in an increase in the size of the entire structure.
- the conventional vehicle lamp guides the light through a light guide, the desired light distribution can be achieved by forming an area with a high light intensity in a single irradiation slit on the shade. is difficult to obtain, and it is difficult to adjust the light distribution of the irradiation pattern on the road surface.
- the vehicular lamp 10 has a condensing lens portion (31) that guides light from each light source (21, 22, 23) inwardly from an incident surface (34) and emits the light from an emitting surface (35). , 32, 33) are provided.
- the light emitted from the light sources (21, 22, 23) in the direction substantially along the projection optical axis Lp is incident on the incident surface 34 of the condensing lens 12 from the on-axis incident surface portion 36.
- the light emitted from each light source in a direction that spreads (has a large angle with respect to the projection optical axis Lp) is made incident from the inclined incident surface portion 37 of the incident surface 34 and reflected by the reflecting surface 38 .
- the vehicular lamp 10 mainly emits the light that has passed through the axial incidence surface portion 36 from the inner emission surface portion 41 of the emission surface 35, and mainly emits the light that has passed through the inclined incidence surface portion 37 and is reflected by the reflecting surface 38.
- the light is emitted from the outer emission surface portion 42 of the surface 35 . Therefore, the vehicular lamp 10 converges the light from the light sources (21, 22, 23) to the corresponding slit portions 28 using the corresponding condensing lens portions (31, 32, 33) in a desired manner. Since the light can be emitted, each slit portion 28 can have a desired light distribution, and the light distribution of the irradiation pattern Pi on the road surface can be adjusted.
- each slit portion 28 can be more easily and appropriately provided with a desired light distribution.
- the vehicle lamp 10 uses a single condensing lens 12 formed by stacking condensing lens portions (31, 32, 33), and a single shade 13 is provided with a plurality of slit portions 28. ing.
- the vehicular lamp 10 has a larger overall structure than conventional vehicular lamps in which a shade is provided for each irradiation slit and a light guide is provided to guide light from each light source to each shade. can suppress erosion.
- the vehicular lamp 10 has a desired light distribution on the shade 13 with the single condensing lens 12 . Specifically, the vehicular lamp 10 forms an inner area Ai on the shade 13 with light passing through an axial incident surface portion 36 of the incident surface 34 and an inner emitting surface portion 41 of the emitting surface 35, and an inclined incident surface portion of the incident surface 34. The light passes through 37, is reflected by the reflecting surface 38, and passes through the outer emission surface portion 42 of the emission surface 35 to form the outer area Ao on the shade 13.
- the vehicle lamp 10 forms each irradiation area by overlapping the two areas (Ai, Ao) on the slits 28 on the shade 13 .
- the vehicle lamp 10 can illuminate the shade 13 with a desired light distribution by using a single condenser lens 12 for each light source (21, 22, 23).
- the vehicle lamp 10 can have a desired light distribution in the formed irradiation pattern Pi, and can have a simpler configuration and a smaller size than conventional vehicle lamps.
- the light from each light source (21, 22, 23) is guided inward by each of the corresponding condenser lens portions (31, 32, 33) in the single condenser lens 12. Since the light is emitted from the emission surface 35 and condensed, the three lights can be guided onto the corresponding slit portions 28 .
- the condenser lens 12 has two optical paths: an optical path passing through the axial entrance surface portion 36 and the inner exit surface portion 41, and an optical path passing through the inclined entrance surface portion 37, the reflecting surface 38, and the outer exit surface portion 42.
- the vehicle lamp 10 can easily adjust the light distribution on the shade 13 even if a single condensing lens 12 is used for each light source (21, 22, 23). For these reasons, the vehicular lamp 10 can easily form a light distribution in each slit portion 28 on the shade 13 while suppressing an increase in size, as compared with a conventional vehicular lamp.
- the light sources (21, 22, 23) and the condensing lens portions (31, 32, 33) are associated with the respective slit portions 28 individually. By turning on the light, each irradiation pattern Di can be formed in order.
- the vehicle lamp 10 of Embodiment 1 can obtain the following effects.
- the vehicle lamp 10 includes a plurality of light sources (21, 22, 23), a condenser lens 12, a light shielding member (shade 13), and a projection lens 14.
- a plurality of condenser lens portions (31, 32, 33) are superimposed so that the condenser lenses 12 individually correspond to the slit portions 28, respectively. Therefore, the vehicle lamp 10 can condense the light from each light source to the corresponding slit portion 28 in a desired manner using each corresponding condensing lens portion. Thereby, the vehicle lamp 10 can make each slit part 28 have a desired light distribution, and can adjust the light distribution of the irradiation pattern Pi on the road surface. Further, since the vehicle lamp 10 uses the single condenser lens 12 and the single shade 13 is provided with the plurality of slit portions 28, the overall configuration is larger than that of the conventional vehicle lamp. can suppress erosion.
- a plurality of condensing lens portions are arranged on an incident surface 34 with an on-axis incident surface portion 36 provided on the output optical axis of the corresponding light source and inclined with respect thereto. and a plurality of inclined incidence surface portions 37 (in the first embodiment, the inclined incidence surface portions 37 paired with the on-axis incidence surface portion 36 interposed therebetween), and a reflecting surface 38 corresponding to each inclined incidence surface portion 37 . Therefore, the vehicular lamp 10 has a difference in the area formed by the optical path passing through the axial entrance surface portion 36 and the inner exit surface portion 41 and the optical path passing through the inclined entrance surface portion 37, the reflecting surface 38 and the outer exit surface portion 42. , a desired light distribution in each slit portion 28 can be easily formed.
- the plurality of condensing lens portions are provided on the emission surface 35 on the emission optical axis of the corresponding light source and formed on the inner emission surface portion 41 corresponding to the on-axis incidence surface portion 36 . , and an outer emission surface portion 42 corresponding to the reflection surface 38 and provided in a pair on both sides thereof.
- the inner emission surface portion 41 spreads the light that has passed through the axial incidence surface portion 36 toward the entire corresponding slit portion 28, and the outer emission surface portion 42 receives the light from the reflecting surface 38. The light is condensed toward a desired position in the slit portion 28 where the light is focused.
- the vehicular lamp 10 forms a plurality of light distribution images in which the shape of the light sources (21, 22, 23) corresponding to the light passing through the on-axis incident surface portion 36 is not significantly changed, the entire slit portion 28 is It can be irradiated evenly.
- the shape of a plurality of light distribution images of the light sources (21, 22, 23) corresponding to the light passing through the outer emission surface 42 is distorted. Since the light is partially condensed, the influence of the distortion can be made extremely small. Therefore, the vehicle lamp 10 can easily and appropriately form a desired light distribution in each slit portion 28 .
- a plurality of light sources (21, 22, 23) are sequentially turned on, and in the condenser lens 12, the dimensions of the condenser lens portions (31, 32, 33) in the first direction (vertical direction) are The condensing lens portions (31, 32, 33) corresponding to the light sources (21, 22, 23) that are turned on later are made larger. Therefore, even when the illumination patterns Di are turned on in order from near to far, the vehicular lamp 10 can suppress the enlargement of the illumination symbols caused by the difference in distance. The difference in brightness between Di can be reduced.
- the condensing optical paths 43 from the condensing lens portions (31, 32, 33) to the corresponding slit portions 28 are partitioned by the light shielding plate 44 for each corresponding combination. Therefore, the vehicular lamp 10 can prevent the light passing through each condenser lens portion (31, 32, 33) from proceeding to the non-corresponding slit portion 28.
- the pattern Pi) can be formed more clearly.
- the vehicle lamp 10 is constructed by integrating a plurality of condenser lens portions (31, 32, 33) into the condenser lens 12. Therefore, the vehicular lamp 10 can contribute to further miniaturization and can appropriately form each illumination pattern Di.
- a reference line Lb along which a plurality of irradiation patterns Di are arranged is set in the irradiation pattern Pi, and a slit reference line Ls (light-transmitting portion reference line) corresponding to the reference line Lb is set in the light shielding member (shade 13).
- the light shielding member (13 ), the slit reference line Ls is inclined to the inclined side. Therefore, when the vehicle lamp 10 is projected onto the road surface 2 by the projection lens 14, it is possible to achieve a positional relationship aimed at each irradiation pattern Di and form a desired irradiation pattern Pi on the road surface 2.
- the vehicle lamp 10 of Example 1 as the vehicle lamp according to the present disclosure can form an irradiation pattern Pi with a desired light distribution while suppressing an increase in size.
- FIG. 14 to 17 a vehicle lamp 10A of Example 2, which is one embodiment of the present disclosure, will be described with reference to FIGS. 14 to 17.
- FIG. The vehicle lamp 10A forms an irradiation pattern PiA different from that of the vehicle lamp 10 of the first embodiment. Since the vehicle lamp 10A has the same basic concept and structure as the vehicle lamp 10 of the first embodiment, the same reference numerals are given to the parts having the same structure, and detailed description thereof will be omitted.
- the vehicle lamp 10A of Example 2 forms an irradiation pattern PiA on the road surface 2 behind the vehicle 1, as shown in FIG.
- the irradiation pattern PiA has three irradiation patterns DiA arranged in the lateral direction of the vehicle 1 at the rear of the vehicle 1, and the three irradiation patterns DiA are aligned in the direction away from the vehicle 1 at approximately equal intervals.
- the one farthest from the vehicle 1 is designated as the first irradiation pattern DiA1
- the second irradiation pattern DiA2 and the third irradiation pattern DiA3 are arranged in order.
- the first irradiation pattern DiA1 is a distant irradiation pattern
- the third irradiation pattern DiA3 is a near irradiation pattern
- the second irradiation pattern DiA2 therebetween is an intermediate irradiation pattern.
- Each irradiation pattern DiA is a V-shaped symbol that is elongated in the direction of travel of the vehicle 1 and opens wide, and has the same size.
- the direction in which the V-shaped vertices of the irradiation patterns DiA are arranged is the arrow direction
- the pointing side (the first irradiation pattern DiA1 side) is the front side of the arrow direction.
- the irradiation pattern PiA can be made to look like an arrow pointing in the direction of the arrow from the vehicle 1 by arranging three irradiation patterns DiA.
- a reference line LbA is set in this irradiation pattern PiA.
- the reference line LbA extends in the direction of the arrow, that is, in the left-right direction of the vehicle 1, and is positioned on the outer side of each irradiation pattern DiA (the side away from the vehicle 1 and the lower side when viewed from the front in FIG. 14). . That is, each irradiated pattern DiA has an outer end positioned on the reference line LbA.
- the vehicle lamp 10A differs from the vehicle lamp 10 of the first embodiment in part of the configuration of the light source unit 11A and the shade 13A in order to form the irradiation pattern PiA as described above.
- each light source (21, 22, 23) emits amber light (amber light) with Lambertian distribution centered on the emission optical axis.
- the positional relationship of the first light source 21, the second light source 22, and the third light source 23 on the substrate 24 is different from that of the vehicle lamp 10.
- the third light source 23 of the second embodiment is positioned above the projection optical axis Lp in the vertical direction and outside the projection optical axis Lp in the width direction (on the outer edge side of the vehicle 1 in which it is mounted).
- the second light source 22 of Example 2 is positioned slightly above the projection optical axis Lp in the vertical direction and slightly outside the projection optical axis Lp in the width direction.
- the first light source 21 of the second embodiment is positioned below the projection optical axis Lp in the vertical direction and inside the projection optical axis Lp in the width direction (center side of the vehicle 1 in which it is mounted). .
- the three light sources (21, 22, 23) are in a positional relationship in which they are greatly inclined inward from the third light source 23 toward the first light source 21 with respect to the vertical direction.
- each slit portion 28A projects the projection optical axis Lp with respect to the positional relationship of each irradiation pattern DiA of the irradiation pattern PiA.
- the positional relationship is rotationally symmetric about the center (see FIGS. 14, 16, and 17).
- the first slit portion 28A1 on the innermost side in the width direction (on the center side of the vehicle 1 in which it is mounted) corresponds to the first irradiation pattern DiA1 (distant irradiation pattern) of the irradiation pattern PiA. It becomes a slit part.
- a second slit portion 28A2 on the outer side (outer edge side of the vehicle 1 in which it is mounted) serves as an intermediate slit portion corresponding to the second irradiation pattern DiA2 (intermediate irradiation pattern).
- the outermost third slit portion 28A3 becomes a near slit portion corresponding to the third irradiation pattern DiA3 (near irradiation pattern).
- each slit part 28A is positioned on the shade part 25 so that each irradiation pattern DiA has a desired positional relationship on the road surface 2 .
- the illumination patterns DiA are arranged in parallel in a direction greatly inclined toward the inner side in the width direction from the upper side to the lower side in the vertical direction.
- the center of the third slit portion 28A3 is located above the projection optical axis Lp in the vertical direction and outside the projection optical axis Lp in the width direction.
- the center of the second slit portion 28A2 is positioned below the projection optical axis Lp in the vertical direction and inside the projection optical axis Lp in the width direction.
- the first slit portion 28A1 is positioned below the center of the second slit portion 28A2 in the vertical direction and inside the center of the second slit portion 28A2 in the width direction.
- Each slit part 28A has a shape that imitates a V-shaped symbol that opens wide like the corresponding irradiation pattern DiA, and is vertically and horizontally reversed with respect to each irradiation pattern DiA.
- the three slit portions 28A are sized according to the distance to the road surface 2 and the angle between the road surface 2 and the projection optical axis Lp so that the irradiation patterns DiA are of the same size on the road surface 2 and are spaced at approximately equal intervals. length, shape and spacing. More specifically, the vehicular lamp 10A is provided with the projection optical axis Lp inclined with respect to the road surface 2, so that the distances from the shade 13A and the projection lens 14 to the road surface 2 are different. , each slit portion 28A (each irradiation pattern DiA which is light passing therethrough) has a size and an interval corresponding to the distance.
- the sizes and intervals of the slit portions 28A are set according to the distance to the road surface 2 so that the irradiation patterns Di are approximately equal in size on the road surface 2.
- the first slit portion 28A1 is shaped like a thin V-shaped symbol
- the second slit portion 28A2 is shaped like a thicker V-shaped symbol than the first slit portion 28A1.
- the third slit portion 28A3 is thicker than the second slit portion 28A2.
- the slit reference line LsA on the shade 13A is curved, and each slit portion 28A is distorted with respect to each irradiation pattern Di so as to match the curvature of the slit reference line LsA.
- This vehicular lamp 10A is assembled in the same manner as the vehicular lamp 10 of the first embodiment. It is provided at the rear part of the vehicle 1 in a state where it is closed (see FIG. 14). At this time, in the vehicle lamp 10A, the slit reference line LsA was curved on the shade 13A, but when projected onto the road surface 2, the corresponding reference line LbA becomes substantially straight and substantially parallel to the left-right direction of the vehicle 1. It is said that The vehicle lamp 10 ⁇ /b>A rotates the housing 15 about the projection optical axis Lp in a state of being provided in the rear portion of the vehicle 1 .
- the vehicle lamp 10A can adjust the direction (arrow direction) in which the three irradiation patterns DiA are arranged and the degree of curvature of the reference line LbA in the irradiation pattern PiA formed on the road surface 2 .
- the vehicular lamp 10A appropriately sets the posture of the housing 15 around the projection optical axis Lp so that the direction in which the three irradiation patterns DiA are arranged (the direction of the arrow) and the reference line LbA are aligned in the left-right direction of the vehicle 1.
- the vehicle lamp 10A can form an irradiation pattern PiA in which three irradiation patterns DiA arranged in the lateral direction of the vehicle 1 are arranged on the road surface 2 behind the vehicle 1, as shown in FIG.
- the vehicle lamp 10A of the second embodiment is interlocked with the turn lamps, and when either the left or right turn lamp is lit, the light sources (21, 22, 23) provided on the lit side turn on. It is turned on to form an irradiation pattern PiA on the road surface 2 .
- the irradiation pattern PiA is lit in the order of the third irradiation pattern Di3, the second irradiation pattern Di2, and the first irradiation pattern Di1, as in the first embodiment. Therefore, as shown in FIG. 17, for example, when the vehicle 1 is about to turn left from an alley on which the vehicle 1 is traveling, the vehicle lamp 10A can be used even when the turn lamp of the vehicle 1 is difficult to see.
- the irradiation pattern PiA formed on 2 can be visually recognized. As a result, even if the driver of a bicycle, motorcycle, or the like behind the vehicle 1 does not notice the flickering of the turn lamps of the vehicle 1 because there is a large vehicle 1B behind the vehicle 1, the road surface 2 Since the large irradiation pattern PiA is formed on the way ahead, it can be instantly recognized that the vehicle 1 is turning left. In addition, in the vehicle 1, when the hazard lamps are turned on, the left and right vehicle lamps 10 simultaneously form the irradiation pattern Pi on the road surface 2 (see FIG. 14), so only the left and right turn lamps are turned on. It is possible to recognize that the hazard lamp is on more reliably than when the hazard lamp is blinking.
- the vehicle lamp 10A of Example 2 can obtain the following effects. Since the vehicle lamp 10A basically has the same configuration as the vehicle lamp 10 of the first embodiment, the same effects as those of the first embodiment can be obtained.
- the housing 15 is rotated around the projection optical axis Lp to change the direction in which the plurality of irradiation patterns Di in the projected irradiation pattern Pi are aligned. It is adjustable.
- the vehicular lamp 10A is provided in the rear part of the vehicle 1, but there are restrictions on the place and size where it can be installed. direction) is limited, and the desired direction (left and right direction of the vehicle 1 in the second embodiment) may not be possible. Since the vehicle lamp 10A has the above configuration, by rotating the housing 15 around the projection optical axis Lp, the direction in which the illumination patterns DiA are arranged can be adjusted to a desired direction.
- the vehicular lamp 10A can set the size and shape of each slit portion 28A on the shade 13A and the slit reference line LsA in consideration of the rotation of the housing 15. These settings can be made easier compared to the case of not considering .
- the vehicle lamp 10 of Example 2 as the vehicle lamp according to the present disclosure can form an irradiation pattern PiA with a desired light distribution while suppressing an increase in size.
- the irradiation pattern Pi is formed by arranging the three irradiation patterns Di having the above-described shape in the above-described direction.
- the irradiation pattern is formed by a shade (light shielding member)
- the pattern of the symbol as the irradiation pattern Di, the position to be formed, the number of the irradiation patterns Di, etc. may be appropriately set.
- vehicle lamp 10 is provided at the rear portion of the vehicle 1 in each embodiment, it can be accommodated in the door mirror, It may be arranged in the lamp chamber of the headlight or the lamp chamber of the taillight (the lamp chambers on both left and right sides of the rear part of the vehicle), or may be provided in the vehicle body, and is not limited to the configuration of each embodiment.
- the shade 13 that passes the light condensed by the condensing lens 12 from each slit portion 28 (28A) of the irradiation slit 27 is used as a light shielding member.
- the light shielding member may have another configuration as long as it is provided with a plurality of light transmitting portions (slit portions) that partially pass the light condensed by the condensing lens.
- a plate-like film member that blocks light transmission is provided with an irradiation slit that partially transmits light, and a light shielding plate (filter) that transmits the light that has passed through the condenser lens from the irradiation slit. can do.
- the vehicle 1 driven by the driver is provided with vehicle lamps 10 and 10A.
- the vehicle lamp may be provided in a vehicle having an automatic driving function, and is not limited to the configuration of each embodiment.
- the vehicular lamp is not limited to the configuration of each embodiment as long as it forms an irradiation pattern at a timing corresponding to the purpose of installation, that is, a timing corresponding to some intention regarding the operation of the vehicle 1 .
- the exit surface 35 of the condensing lens 12 has a step between the inner exit surface portion 41 and the outside exit surface portion 42 .
- the vehicular lamp does not need to provide a step between the inner emission surface portion 41 and the outer emission surface portion 42 in the emission surface 35, and may have uniform optical characteristics, and is not limited to the configuration of each embodiment.
- the condenser lens if a step is not provided between the inner emission surface portion and the outer emission surface portion, light near the boundary between them is prevented from being refracted or reflected by the step and traveling in an unintended direction. As a result, the light can be used more efficiently.
- the shade 13 is provided with three slit portions 28 (28A), and correspondingly, the condenser lens 12 is provided with three condenser lens portions (31, 32, 33) and three light sources. (21, 22, 23) are provided.
- the number thereof may be appropriately set.
- it is not limited to the configuration of each embodiment.
- the ratio may be appropriately set. It is not limited to the configuration of the embodiment.
- the condensing optical path 43 is partitioned by each light shielding plate 44 for each combination of the corresponding slit portions 28 (translucent portions) from the condensing lens portions (31, 32, 33).
- the light passing through each condensing lens does not travel to the non-corresponding slit (light-transmitting portion), it may not be provided, and the configuration is not limited to each embodiment.
- Vehicle lamp 12 Condensing lens 13, 13A Shade (as an example of a light shielding member) 14 Projection lens 15 Housing 21 First light source 22 Second light source 23 Third light source 28 (As an example of translucent part) Slit part 31 First condenser lens part 32 Second condenser lens part 33 Third condenser lens part 34 Incident surface 35 Output surface 36 On-axis incident surface portion 37 Inclined incident surface portion 38 Reflective surface 41 Inner output surface portion 42 Outer output surface portion 43 Condensed light path 44 Shading plate Di, DiA Irradiation pattern Lb Reference line Pi Irradiation pattern
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- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
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- Non-Portable Lighting Devices Or Systems Thereof (AREA)
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Abstract
Description
Claims (8)
- 複数の光源と、
複数の前記光源からの光を入射面から入射させて出射面から出射して集光する集光レンズと、
前記集光レンズで集光された光を部分的に通す複数の透光部が設けられた遮光部材と、
前記遮光部材を通した光を投影することにより、複数の前記透光部に対応する複数の照射図柄を有する照射パターンを形成する投影レンズと、を備え、
前記光源は、前記透光部に個別に対応して設けられ、
前記集光レンズは、前記透光部に個別に対応する複数の集光レンズ部が重ねられていることを特徴とする車両用灯具。 - 複数の前記集光レンズ部は、前記入射面が、対応する前記光源の出射光軸上に設けられた軸上入射面部と、前記軸上入射面部に対して傾斜された複数の傾斜入射面部と、を有し、
複数の前記集光レンズ部は、それぞれの前記傾斜入射面部に対応する反射面を有することを特徴とする請求項1に記載の車両用灯具。 - 複数の前記集光レンズ部は、前記出射面が、前記出射光軸上に設けられて前記軸上入射面部に対応する内側出射面部と、前記内側出射面部を挟んで対を為して設けられて前記反射面に対応する外側出射面部と、を有し、
前記内側出射面部は、前記軸上入射面部を経た光を、対応する前記透光部の全体に向かうように広げ、
前記外側出射面部は、前記反射面からの光を、対応する前記透光部における所望の位置に向けて集光することを特徴とする請求項2に記載の車両用灯具。 - 複数の前記集光レンズ部が重ねられた方向を第1方向として、
複数の前記光源は、順次点灯され、
前記集光レンズは、前記第1方向における前記集光レンズ部の寸法が、点灯される順番が遅い前記光源に対応する前記集光レンズ部ほど大きいことを特徴とする請求項1に記載の車両用灯具。 - 複数の前記集光レンズ部から対応する前記透光部に至る間を集光光路とし、
前記集光光路は、対応する前記集光レンズ部と前記透光部との組み合わせ毎に遮光板により区画されていることを特徴とする請求項1に記載の車両用灯具。 - 前記集光レンズは、複数の前記集光レンズ部が一体化されて構成されていることを特徴とする請求項1に記載の車両用灯具。
- 前記照射パターンは、複数の前記照射図柄が並べられる基準線が設定され、
前記遮光部材では、前記基準線に対応する透光部基準線が設定され、
複数の前記集光レンズ部が重ねられた方向を第1方向として、
複数の前記光源は、その並べられる方向が、前記第1方向に対して、前記遮光部材上において前記透光部基準線が傾けられた側に傾斜されていることを特徴とする請求項1に記載の車両用灯具。 - 複数の前記光源と前記集光レンズと前記遮光部材と前記投影レンズとは、筐体に固定され、
前記筐体は、車両に搭載される際、投影光軸を中心に回転されることで、投影された前記照射パターンにおける複数の前記照射図柄が並ぶ方向を調整可能とすることを特徴とする請求項1に記載の車両用灯具。
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EP22784688.8A EP4321798A1 (en) | 2021-04-09 | 2022-04-06 | Vehicle lamp |
US18/554,547 US20240198896A1 (en) | 2021-04-09 | 2022-04-06 | Vehicle lamp |
CN202280027097.8A CN117120769A (zh) | 2021-04-09 | 2022-04-06 | 车辆用灯具 |
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JP2021-066747 | 2021-04-09 | ||
JP2021066747 | 2021-04-09 |
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PCT/JP2022/017165 WO2022215706A1 (ja) | 2021-04-09 | 2022-04-06 | 車両用灯具 |
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EP (1) | EP4321798A1 (ja) |
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US20230003358A1 (en) * | 2021-06-30 | 2023-01-05 | Hyundai Mobis Co., Ltd. | Lamp for vehicle |
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JP2019192350A (ja) | 2018-04-18 | 2019-10-31 | マクセル株式会社 | 路面映像投射装置および車両用灯具 |
JP2020205237A (ja) * | 2019-06-12 | 2020-12-24 | 市光工業株式会社 | 車両用灯具 |
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2022
- 2022-04-06 EP EP22784688.8A patent/EP4321798A1/en active Pending
- 2022-04-06 CN CN202280027097.8A patent/CN117120769A/zh active Pending
- 2022-04-06 US US18/554,547 patent/US20240198896A1/en active Pending
- 2022-04-06 WO PCT/JP2022/017165 patent/WO2022215706A1/ja active Application Filing
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JP2019192350A (ja) | 2018-04-18 | 2019-10-31 | マクセル株式会社 | 路面映像投射装置および車両用灯具 |
JP2020205237A (ja) * | 2019-06-12 | 2020-12-24 | 市光工業株式会社 | 車両用灯具 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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US20230003358A1 (en) * | 2021-06-30 | 2023-01-05 | Hyundai Mobis Co., Ltd. | Lamp for vehicle |
US11982419B2 (en) * | 2021-06-30 | 2024-05-14 | Hyundai Mobis Co., Ltd. | Lamp for vehicle |
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JP2022161893A (ja) | 2022-10-21 |
EP4321798A1 (en) | 2024-02-14 |
US20240198896A1 (en) | 2024-06-20 |
CN117120769A (zh) | 2023-11-24 |
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