Vehicular head light

Abstract

To provide a vehicular head light capable of properly performing light distribution design of an irradiation pattern.SOLUTION: A vehicular head light includes: a plurality of light sources arranged in the left-to-right direction; a light source side lens arranged in front of the plurality of light sources and for emitting light frontward; and a projection lens arranged in front of the light source side lens, and for forming an irradiation pattern by radiating the light emitted from the light source side lens to the vehicle front. The light source side lens includes: an incident part which is provided at each light source and where light enters from the light source; a light guide part for guiding the light which has entered from the incident part; and an emission part for emitting the light guided in the light guide part to the front. The incident part includes: a first incident surface opposing to a light emitting surface of the light source; a second incident surface formed in a cylindrical manner so as to surround the first incident surface on an outer periphery of the first incident surface; and an incident side reflection surface for reflecting the light which has entered from the second incident surface toward the light guide part. From the center across to both ends in the left-to-right direction, with respect to the incident part to which at least part of the plurality of incident parts are adjacent, an interval in the frontward / backward direction between the light source and the incident part becomes larger.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a vehicle headlamp. [Background technology]

[0002] A known vehicle headlamp configuration includes, for example, a light-emitting element and a light-transmitting block through which light from the light-emitting element passes, with first and second reflecting surfaces formed on the surface of the light-transmitting block to reflect the light passing through the light-transmitting block (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2006-324013 A Summary of the Invention [Problem to be solved by the invention]

[0004] In a vehicle headlamp such as that described in Patent Document 1, when used as a low beam headlamp, it is required to appropriately design the light distribution of the irradiation pattern.

[0005] The present invention has been made in view of the above, and has an object to provide a vehicle headlamp that enables appropriate light distribution design of an irradiation pattern. [Means for solving the problem]

[0006] The vehicle headlamp of the present invention includes a plurality of light sources arranged in the left-right direction, a light source side lens arranged in front of the plurality of light sources and emitting light forward, and a projection lens arranged in front of the light source side lens and irradiating the light emitted from the light source side lens to the front of the vehicle to form an illumination pattern, the light source side lens having an entrance section provided for each of the light sources into which light from the light source is incident, a light guiding section that guides the light incident from the entrance section, and an exit section that emits the light guided by the light guiding section forward, the entrance section having a first entrance surface facing the light emitting surface of the light source, a second entrance surface formed in a cylindrical shape around the outer periphery of the first entrance surface so as to surround the first entrance surface, and an entrance-side reflection surface that reflects the light incident from the second entrance surface toward the light guiding section, and from the center to both ends in the left-right direction, the front-to-rear distance between the light source and the entrance section is larger than that of the adjacent entrance sections for at least a portion of the plurality of entrance sections. Effect of the Invention

[0007] According to the present invention, it is possible to provide a vehicle headlamp that makes it possible to appropriately design the light distribution of an irradiation pattern. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a diagram showing an example of a vehicle lamp according to this embodiment as viewed from the right. [Diagram 2] FIG. 2 is a diagram showing an example of the vehicle lamp according to this embodiment as viewed from above. [Diagram 3] FIG. 3 is a diagram showing an example of the vehicle lamp according to this embodiment as viewed from the rear. [Figure 4] FIG. 4 is a diagram showing a configuration along the cross section AA in FIG. [Diagram 5] FIG. 5 is a diagram showing an example of a light path of a vehicle headlamp according to this embodiment. [Figure 6] FIG. 6 is a diagram showing an example of an irradiation pattern formed in front of a vehicle. [Figure 7] FIG. 7 is a diagram showing a comparative example of an irradiation pattern formed in front of a vehicle. [Figure 8] FIG. 8 is a diagram showing another example of a vehicle lamp according to this embodiment. [Figure 9] FIG. 9 is a diagram showing another example of a vehicle lamp according to this embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, an embodiment of a vehicle headlamp according to the present invention will be described with reference to the drawings. Note that the present invention is not limited to this embodiment. Also, the components in the following embodiments include those that are replaceable and easy for a person skilled in the art, or those that are substantially the same. In the following description, the front-rear, up-down, and left-right directions refer to directions in a state in which the vehicle headlamp is mounted on a vehicle, and indicate directions when the vehicle is viewed from the driver's seat in the direction of travel of the vehicle. Note that in this embodiment, the up-down direction is parallel to the vertical direction, and the left-right direction is horizontal.

[0010] Fig. 1 is a diagram showing an example of the vehicle headlamp 100 according to this embodiment as viewed from the right. Fig. 2 is a diagram showing an example of the vehicle headlamp 100 as viewed from above. Fig. 3 is a diagram showing an example of the vehicle headlamp 100 as viewed from behind. Fig. 4 is a diagram showing a configuration along the AA cross section in Fig. 1.

[0011] The vehicle headlamp 100 includes a plurality of light sources 10, a light source side lens 20, a projection lens 30, and a heat sink 40. The vehicle headlamp 100 irradiates a low beam pattern P, which will be described later, as an irradiation pattern toward the front of the vehicle. The vehicle headlamp 100 is disposed on the left and right sides of the front of the vehicle. In this embodiment, the vehicle headlamp 100 disposed on the front right side of a vehicle traveling on a left-hand traffic road will be described as an example.

[0012] The light sources 10 may be semiconductor elements such as LEDs (Light Emitting Diodes) and semiconductor lasers. Each light source 10 has a light emitting surface 11 that emits light. The light emitting surface 11 faces forward. In this embodiment, a plurality of light sources 10, for example, five light sources 10, are arranged in the left-right direction. The number of light sources 10 is not limited to five, and may be three or more. The light sources 10 are arranged at equal pitches (pitch R: see FIG. 4) in the left-right direction from the center to both ends in the left-right direction. The light sources 10 are supported by a support surface 12a of a substrate 12. The support surface 12a is planar. Therefore, the light sources 10 are supported by the support surface 12a, which is a single plane.

[0013] The light source side lens 20 is disposed in front of the multiple light sources 10. The light source side lens 20 guides light from the multiple light sources 10 and emits the light forward. The light source side lens 20 is formed using a resin material or the like that is capable of transmitting light from the light sources 10. The light source side lens 20 has an entrance section 21, a light guide section 22, and an exit section 23.

[0014] An incident portion 21 is provided for each light source 10. Light from the corresponding light source 10 is incident on the incident portion 21. The multiple incident portions 21 are arranged in the left-right direction corresponding to the multiple light sources 10. The multiple incident portions 21 are formed to have the same shape and dimensions. The multiple incident portions 21 are arranged at an equal pitch (pitch R: see FIG. 4) from the center to both ends in the left-right direction corresponding to the arrangement of the multiple light sources 10. Each incident portion 21 has a first incident surface 21a, a second incident surface 21b, and an incident side reflecting surface 21c (see FIG. 4, etc.).

[0015] The first incident surface 21a faces the light emitting surface 11 of the light source 10. The first incident surface 21a receives light emitted forward from the light emitting surface 11. The first incident surface 21a is formed, for example, in a circular shape when viewed from behind. The first incident surface 21a is, for example, a convex surface that protrudes toward the light source 10, but may be a flat surface. The first incident surface 21a diffuses the incident light.

[0016] The second incident surface 21b is arranged along the outer periphery of the first incident surface 21a. The second incident surface 21b is formed, for example, in a cylindrical shape so as to surround the first incident surface 21a. The light emitted laterally from the light emitting surface 11 is incident on the second incident surface 21b. The second incident surface 21b may be formed such that its diameter decreases forward.

[0017] The incident-side reflecting surface 21c is arranged along the outer periphery of the second incident surface 21b. The incident-side reflecting surface 21c reflects forward the light incident from the second incident surface 21b so as to converge the light.

[0018] The light guide portion 22 guides the light incident from the incident portion 21. The light guide portion 22 has a first reflecting surface 22a and a second reflecting surface 22b.

[0019] As shown in FIG. 4, the distance in the front-rear direction between the light source 10 and the incident portion 21 increases from the center in the left-right direction to both ends. That is, if the distance in the front-rear direction between the light source 10 (light source S1) and the incident portion 21 (incident portion I1) arranged at the center in the left-right direction is D1, the distance in the front-rear direction between the light source 10 (light sources S2A, S2B) and the incident portion 21 (incident portions I2A, I2B) located one adjacent to both sides in the left-right direction with respect to the light source 10 and the incident portion 21 at the center in the left-right direction is D2, and the distance in the front-rear direction between the light source 10 (light sources S3A, S3B) and the incident portion 21 (incident portions I3A, I3B) located two adjacent to both sides in the left-right direction with respect to the light source 10 and the incident portion 21 at the center in the left-right direction is D3, then D1 < D2 < D3. Specifically, in the present embodiment, D1, D2, and D3 can be the distances between the light emitting surface 11 of the light source 10 and the rear end portion of the second surface 21b of the incident portion 21, respectively.

[0020] In the present embodiment, the thicknesses of the plurality of light sources 10 are the same and are supported on the support surface 12a of the substrate 12 which is in the same plane. Therefore, the plurality of incident portions 21 are arranged such that the distance from the light source 10 gradually increases from the center in the left-right direction to both ends. Also, the plurality of incident portions 21 are formed such that their shapes and dimensions are the same.

[0021] The first reflecting surface 22a internally reflects the light incident from the incident portion 21 in the vertical direction. The first reflecting surface 22a is a curved surface formed so as to protrude forward from the lower end to the upper end in the vertical direction and to protrude forward from both ends to the center in the horizontal direction. In this embodiment, the first reflecting surface 22a is configured to internally reflect the light incident from the incident portion 21 upward, but is not limited to this configuration and may be configured to internally reflect the light downward.

[0022] The second reflecting surface 22b is disposed above the first reflecting surface 22a. The second reflecting surface 22b reflects the light reflected by the first reflecting surface 22a forward. The second reflecting surface 22b is, for example, planar, and disposed in a tilted state with respect to the horizontal plane so that the front end is positioned higher than the rear end.

[0023] In the light guiding section 22, a cutoff forming section 24 is provided on an end side 22c on the rear side of the second reflecting surface 22b. The cutoff forming section 24 has straight line sections 24a, 24c and a recessed section 24b. The straight line sections 24a, 24c form horizontal cutoff lines CLa, CLc (see FIG. 6) of an irradiation pattern P described later. The recessed section 24b forms an oblique cutoff line CLb (see FIG. 6) of an irradiation pattern described later. The recessed section 24b is provided at the focal position of the projection lens 30 or in the vicinity of the focal position.

[0024] A rear-side reflecting surface 22d is provided below second reflecting surface 22b in light-guiding section 22. Rear-side reflecting surface 22d internally reflects a portion of the light that is incident from incident section 21 and reflected by first reflecting surface 22a, toward second reflecting surface 22b.

[0025] The exit portion 23 has a common exit surface 23a that outputs the light incident from the multiple entrance portions 21. The exit surface 23a is a curved surface having a shape that protrudes forward. The exit surface 23a may have a shape based on a spherical surface, for example.

[0026] The projection lens 30 is disposed in front of the light source side lens 20. The projection lens 30 forms an illumination pattern by irradiating light from the light source side lens 20 forward of the vehicle. The projection lens 30 has an incident surface 31 and an exit surface 32. The incident surface 31 receives light from the light source side lens 20. The incident surface 31 is, for example, planar. The incident surface 31 may have a curved shape. The exit surface 32 emits the light incident from the incident surface 31 forward of the vehicle. The exit surface 32 has a shape curved in a convex shape toward the front of the vehicle. The exit surface 32 may be, for example, aspherical.

[0027] The heat sink 40 has a base 41 and fins 42. The base 41 is, for example, plate-shaped and is disposed vertically in the front-rear direction. The base 41 supports the above-mentioned substrate 12 at its front surface. The fins 42 are disposed on the rear surface of the base 41. The fins 42 dissipate heat generated by the multiple light sources 10.

[0028] Next, a description will be given of the operation of the vehicle headlamp 100 configured as above. Fig. 5 is a diagram showing an example of the optical path of the vehicle headlamp 100 according to this embodiment.

[0029] By turning on each light source 10 of the vehicle headlamp 100, light is emitted from each light-emitting surface 11. Light (indicated by light ray L1 in the figure) directed mainly forward from each light-emitting surface 11 is incident on the first incident surface 21a of each incident portion 21. Light (hereinafter, indicated by light ray L2) directed mainly to the side from each light-emitting surface 11 is incident on the second incident surface 21b of each incident portion 21. The light ray L1 incident on the first incident surface 21a proceeds forward toward the first reflecting surface 22a so as to be diffused in the up-down and left-right directions. The light ray L2 incident from the second incident surface 21b is reflected forward at the incident-side reflecting surface 21c and proceeds toward the first reflecting surface 22a so as to be condensed in the up-down and left-right directions.

[0030] The light rays L1 and L2 that reach the first reflecting surface 22a are reflected upward and toward the center in the left-right direction by the first reflecting surface 22a, and reach the second reflecting surface 22b. The light rays L1 and L2 that reach the second reflecting surface 22b are reflected forward by the second reflecting surface 22b. The light rays L1 and L2 reflected by the second reflecting surface 22b are emitted from the exit surface 23a. The light rays L1 and L2 emitted from the exit surface 23a are incident on the entrance surface 31 of the projection lens 30, and are emitted from the exit surface 32 to the front of the vehicle. The light rays L1 and L2 emitted from the exit surface 32 form an irradiation pattern P in front of the vehicle.

[0031] FIG. 6 is a diagram showing an example of an irradiation pattern P formed in front of a vehicle. In FIG. 6, lines VV indicate vertical lines of the screen, and lines HH indicate horizontal lines on the left and right sides of the screen. Here, the intersection of the vertical line and the horizontal line is assumed to be the reference position in the horizontal direction. FIG. 6 also shows examples of unit irradiation patterns (P1, P2, P3) formed for each incident portion 21. The irradiation pattern P shown in FIG. 6 is formed in a state where unit irradiation patterns P1, P2, P3 are superimposed on each other.

[0032] The unit irradiation pattern P1 is a pattern formed by light incident on the entrance portion 21 located at the center in the left-right direction. The unit irradiation pattern P2 (P2A, P2B) is a pattern formed by light incident on the entrance portion 21 located next to the entrance portion 21 on both left-right sides of the entrance portion 21 located at the center in the left-right direction. The unit irradiation pattern P3 (P3A, P3B) is a pattern formed by light incident on the entrance portion 21 located next to the entrance portion 21 on both left-right sides of the entrance portion 21 located at the center in the left-right direction.

[0033] Each of the unit irradiation patterns P1, P2, and P3 includes a diffusion region Pa and a light collection region Pb. The diffusion region Pa is formed by a light ray L1 incident on the first incident surface 21a of the incident part 21. The light collection region Pb is formed by a light ray L2 incident on the second incident surface 21b of the incident part 21.

[0034] The irradiation pattern P is formed by overlapping the unit irradiation patterns P1, P2, and P3 formed in this way. The irradiation pattern P has a cutoff line CL. The cutoff line CL includes horizontal cutoff lines CLa and CLc and an oblique cutoff line CLb. The cutoff line CL is formed by light passing through the rear end side 22c of the second reflecting surface 22b.

[0035] FIG. 7 is a diagram showing an irradiation pattern Q and unit irradiation patterns Q1, Q2, and Q3 according to a comparative example. In FIG. 7, the V-V line indicates the vertical line of the screen, and the H-H line indicates the left and right horizontal lines of the screen. The irradiation pattern Q and the unit irradiation patterns Q1, Q2, and Q3 are irradiation patterns formed in a configuration in which the distances between the light source 10 and the incident portion 21 are all made equal with respect to the vehicle headlamp 100 of the present embodiment.

[0036] As shown in FIG. 7, the unit irradiation patterns Q1, Q2, and Q3 each include a diffusion region Qa and a condensing region Qb. Since the irradiation pattern Q and the unit irradiation patterns Q1, Q2, and Q3 shown in FIG. 2 are formed in a configuration in which the distances between the light source 10 and the incident portion 21 are all made equal, the sizes of the diffusion region Qa and the condensing region Qb of the unit irradiation patterns Q1, Q2, and Q3 are equal to each other. For this reason, the irradiation range of the irradiation pattern Q cannot be sufficiently secured in the left-right direction, and the overlapping region Qc of the condensing region Qb spreads in the left-right direction from the reference position.

[0037] On the other hand, in the present embodiment, the distance in the front-rear direction between the light source 10 and the incident portion 21 increases from the center in the left-right direction to both ends (D1 < D2 < D3: see FIG. 4).

[0038] Therefore, from the center to both ends in the left-right direction, the amount of light incident on the first incident surface 21a of the incident portion 21 gradually increases, and the amount of light incident on the second incident surface 21b gradually decreases. That is, from the center to both ends in the left-right direction, the amount of light diffused by the first incident surface 21a of the incident portion 21 gradually increases. Also, from the center to both ends in the left-right direction, the amount of light collected by the incident side reflection surface 21c of the incident portion 21 gradually decreases. Therefore, as shown in FIG. 6, the diffusion area Pa becomes larger in the order of the unit irradiation patterns P1, P2, and P3. In this case, the irradiation area becomes larger in the order of the unit irradiation patterns P1, P2, and P3. Also, the light collection area Pb becomes smaller in the order of the unit irradiation patterns P1, P2, and P3.

[0039] Since such unit irradiation patterns P1, P2, and P3 are overlapped, the irradiation pattern P has a sufficient irradiation range in the left and right directions. In addition, since the overlapping area Pc of the light collection area Pb of the irradiation pattern P is concentrated at the reference position and its vicinity, a gradation is formed in which the brightness decreases appropriately from the reference position to both sides.

[0040] In the above-mentioned vehicle headlamp 100, the configuration in which the multiple entrance portions 21 are formed to have the same shape and dimensions has been described as an example, but the present invention is not limited to this configuration. FIG. 8 is a diagram showing the configuration of a vehicle lamp according to a modified example. As in the vehicle lamp 100A shown in FIG. 8, the multiple entrance portions 21 may be formed such that the diameter of the first entrance surface 21a increases from the center to both ends in the left-right direction and the length of the second entrance surface 21b in the front-rear direction decreases. With this configuration, the amount of light incident on the first entrance surface 21a can be increased from the center to both ends in the left-right direction, and the amount of light incident on the second entrance surface 21b can be reduced.

[0041] Also, in the above-described vehicle headlamp 100, although the configuration in which a plurality of light sources 10 and a plurality of incident portions 21 are arranged so that the pitch in the left-right direction is equal has been described as an example, the present invention is not limited to this configuration. FIG. 9 is a diagram showing the configuration of a vehicle lamp according to a modified example. As in the vehicle lamp 100B shown in FIG. 9, the plurality of light sources 10 and the plurality of incident portions 21 may be arranged such that the pitches R1 and R2 in the left-right direction gradually increase from the center in the left-right direction toward both ends (in the example shown in FIG. 9, R1 < R2). With this configuration, among the unit irradiation patterns P1, P2, and P3, the unit irradiation patterns (for example, unit irradiation patterns P2 and P3) in which the diffusion region Pa is relatively widely formed can be arranged on the outer side in the left-right direction. Therefore, a sufficient irradiation region in the left-right direction of the irradiation pattern P can be ensured. Further, among the unit irradiation patterns P1, P2, and P3, the unit irradiation patterns (for example, unit irradiation patterns P1 and P2) in which the condensing region Pb is relatively widely formed can be arranged closer to the center in the left-right direction. Therefore, the condensing regions Pb can be concentrically overlapped in the reference position of the irradiation pattern P and the vicinity thereof.

[0042] As described above, the vehicle headlamp 100 according to this embodiment includes a plurality of light sources 10 arranged in the left-right direction, a light-source-side lens 20 that is arranged in front of the plurality of light sources 10 and emits light forward, and a projection lens 30 that is arranged in front of the light-source-side lens 20 and emits the light emitted from the light-source-side lens 20 forward of the vehicle to form an illumination pattern P. The light-source-side lens 20 includes an entrance portion 21 that is provided for each light source 10 and into which light from the light source 10 is incident, and a projection lens 30 that guides the light incident from the entrance portion 21. The light guide section 21 has a first entrance surface 21a facing the light emitting surface of the light source 10, a second entrance surface 21b formed in a cylindrical shape so as to surround the first entrance surface 21a on the outer periphery of the first entrance surface 21a, and an entrance-side reflection surface 21c that reflects the light incident from the second entrance surface 21b toward the light guide section 22, and the distance D in the front-rear direction between the light source 10 and the entrance section 21 becomes larger from the center to both ends in the left-right direction. Note that, although it is preferable that the distance D gradually increases in the vehicular lamp 100, the distance D in the front-rear direction between the light source 10 and the entrance section 21 may be the same for some entrance sections 21 as for the adjacent entrance sections. Also, the end portion may include a portion where the distance D is smaller. In other words, it is only necessary that the distance D in the front-rear direction between the light source 10 and the entrance portion 21 is larger in at least some of the entrance portions 21 than in the adjacent entrance portions from the center to both ends in the left-right direction.

[0043] According to this configuration, the distance D in the front-rear direction between the light source 10 and the incident portion 21 becomes larger from the center to both ends in the left-right direction, so that the amount of light incident on the incident portion 21 can be adjusted to gradually decrease from the center to both ends in the left-right direction. In this way, by arranging a plurality of incident portions 21 in which the amount of incident light gradually decreases from the center to both ends in the left-right direction on one light source side lens, it becomes possible to appropriately design the light distribution of the irradiation pattern P based on the light incident from the plurality of incident portions 21.

[0044] In the vehicle headlamp 100 of this embodiment, the irradiation pattern P is formed by superimposing unit irradiation patterns P1, P2, and P3 formed by light incident from each incident portion 21, and the unit irradiation patterns P1, P2, and P3 include a concentration region Pb where light is concentrated and a diffusion region Pa formed around the concentration region Pb, the first incident surface 21a forms the diffusion region Pa, and the second incident surface 21b and the incident-side reflecting surface 21c form the concentration region Pb.

[0045] According to this configuration, the diffusion area Pa becomes larger in the order of unit irradiation patterns P1, P2, P3. Also, the light collection area Pb becomes smaller in the order of unit irradiation patterns P1, P2, P3. Since such unit irradiation patterns P1, P2, P3 are overlapped, it is possible to form an irradiation pattern P with a sufficient irradiation range in the left and right directions. Also, it is possible to form an irradiation pattern P with overlapping areas of the light collection areas Pb concentrated at and near the reference position, and with a gradation in which the brightness decreases appropriately from the reference position to both sides.

[0046] In the vehicle headlamp 100 according to this embodiment, the multiple light sources 10 are supported on the same plane, and the multiple incident portions 21 are arranged so that the distance D between the light sources 10 increases from the center to both ends in the left-right direction.

[0047] According to this configuration, when a plurality of light sources 10 are supported on the same plane, it becomes possible to appropriately design the light distribution of the irradiation pattern P.

[0048] In the vehicle headlamp 100 according to this embodiment, the multiple incident portions 21 are formed to have the same shape and dimensions.

[0049] According to this configuration, when the multiple entrance portions 21 are formed to have the same shape and dimensions, it becomes possible to appropriately design the light distribution of the irradiation pattern P.

[0050] In the vehicle headlamp 100 according to this embodiment, the multiple incident portions 21 are formed so that the area of ​​the first incident surface 21a increases from the center to both ends in the left-right direction, and the length of the second incident surface 21b in the front-rear direction decreases.

[0051] According to this configuration, when multiple incident sections 21 are formed so that the area of ​​the first incident surface 21a increases from the center to both ends in the left-right direction and the length of the second incident surface 21b in the front-to-back direction decreases, it is possible to appropriately design the light distribution of the irradiation pattern P.

[0052] In the vehicle headlamp 100 according to this embodiment, the multiple light sources 10 and the multiple incident portions 21 are arranged so that the left-right pitch (R1, R2) gradually increases from the center to both ends in the left-right direction.

[0053] According to this configuration, the multiple light sources 10 and the multiple incident parts 21 are arranged so that the pitch (R1, R2) in the left-right direction gradually increases from the center to both ends in the left-right direction, so that the unit irradiation pattern (e.g., unit irradiation pattern P3) in which the diffusion area Pa is relatively wide can be arranged further outward in the left-right direction. This makes it possible to sufficiently secure the irradiation area in the left-right direction of the irradiation pattern P. In addition, the unit irradiation patterns (e.g., unit irradiation patterns P1, P2) in which the light collection area Pb is relatively wide can be arranged closer to the center in the left-right direction, so that the light collection areas Pb can be concentrated at and near the reference position of the irradiation pattern P and overlapped.

[0054] In the vehicle headlamp 100 of this embodiment, the light-guiding section 22 has a first reflecting surface 22a that internally reflects the light incident from the incident section 21 in the upward and downward directions, and a second reflecting surface 22b that internally reflects the light reflected by the first reflecting surface 22a forward.

[0055] According to this configuration, the position of the light source 10 can be shifted in the vertical direction with respect to the optical axis of the projection lens 30 .

[0056] In the vehicle headlamp 100 according to this embodiment, the irradiation pattern P includes a cutoff line CL, and the second reflecting surface 22b is provided with a cutoff line forming portion 24 for forming the cutoff line CL.

[0057] According to this configuration, since the cutoff forming portion 24 is provided in the light source side lens 20, it is possible to form the irradiation pattern P having the cutoff line CL without providing a separate shade or the like. Therefore, it is possible to reduce the number of parts. [Explanation of symbols]

[0058] CL...cutoff line, CLa, CLc...horizontal cutoff line, CLb...diagonal cutoff line, D...spacing, L1, L2...light ray, P, Q...irradiation pattern, P1, P2, P3, Q1, Q2, Q3...unit irradiation pattern, Pa, Qa...diffusion area, Pb, Qb...concentration area, Pc, Qc...overlap area, R, R1, R2...pitch, 10...light source, 11...light emitting surface, 12...substrate, 12a...support surface, 20...light source Side lens, 21...incident portion, 21a...first incident surface, 21b...second incident surface, 21c...incident side reflecting surface, 22...light guiding portion, 22a...first reflecting surface, 22b...second reflecting surface, 22c...edge, 23...exiting portion, 23a, 32...exiting surface, 24...cutoff forming portion, 24a, 24c...straight portion, 24b...recess, 30...projection lens, 31...incident surface, 40...heat sink, 41...base, 42...fin, 100...vehicle headlamp

Claims

1. A plurality of light sources arranged in the left-right direction; a light source side lens disposed in front of the plurality of light sources and configured to emit light forward; a projection lens disposed in front of the light source side lens and configured to project the light emitted from the light source side lens toward a front of the vehicle to form an illumination pattern; Equipped with the light source side lens includes an incident portion provided for each of the light sources and into which light from the light source is incident, a light guiding portion that guides the light incident from the incident portion, and an exit portion that emits the light guided by the light guiding portion forward, the incident portion has a first incident surface facing a light emitting surface of the light source, a second incident surface formed in a cylindrical shape around an outer periphery of the first incident surface so as to surround the first incident surface, and an incident side reflection surface that reflects the light incident from the second incident surface toward the light guiding portion, From the center to both ends in the left-right direction, the distance in the front-rear direction between the light source and the incident portion is larger for at least some of the plurality of incident portions than for the adjacent incident portions. Vehicle headlamp.

2. the irradiation pattern is formed by superimposing unit irradiation patterns formed by the light incident from each of the incident portions, The unit irradiation pattern includes a light collection region and a diffusion region formed around the light collection region, the diffusion region is formed by light incident on the first incident surface, The light collecting region is formed by light incident on the second entrance surface.

2. The vehicle headlamp according to claim 1.

3. The light sources are supported on the same plane, The plurality of incident portions are arranged such that the distance between the light source and the incident portions increases from the center to both ends in the left-right direction.

3. A vehicle headlamp according to claim 2.

4. The plurality of incident portions are formed to have the same shape and dimensions.

3. A vehicle headlamp according to claim 2.

5. The plurality of incident portions are formed such that the area of ​​the first incident surface increases from the center to both ends in the left-right direction and the length of the second incident surface in the front-rear direction decreases.

3. A vehicle headlamp according to claim 2.

6. The light sources and the incident portions are arranged such that the pitch in the left-right direction gradually increases from the center to both ends in the left-right direction.

3. A vehicle headlamp according to claim 2.

7. The light guide portion has a first reflecting surface that internally reflects the light incident from the incident portion in an upward and downward direction, and a second reflecting surface that internally reflects the light reflected by the first reflecting surface forward.

2. The vehicle headlamp according to claim 1.

8. The irradiation pattern includes a cutoff line, The second reflecting surface is provided with a cutoff forming portion for forming the cutoff line.

8. A vehicle headlamp according to claim 7.

Images