JP6713869B2 - Vehicle lighting - Google Patents

Description

The present invention relates to a vehicle lamp.

For example, a vehicular lamp such as a vehicular headlamp (headlamp) includes a light source, a reflector that reflects the light emitted from the light source in the vehicle traveling direction, and a part of the light reflected by the reflector. A shade for (cutting) and a projection lens for projecting light partially cut by the shade in the vehicle traveling direction are provided. In such a vehicular lamp, as a low beam, a light source image defined by the front end of the shade is reversely projected by a projection lens to form a low beam light distribution pattern including a cutoff line at the upper end. There is.

In the vehicular lamp, another light source that emits light in the vehicle traveling direction is arranged below the shade, and the light emitted from this light source is projected by the projection lens as a traveling beam (high beam). A high beam light distribution pattern is formed above the low beam light distribution pattern.

Furthermore, recently, a light distribution variable headlamp (ADB) that variably controls light distribution of a high beam light distribution pattern by arranging light emitting elements such as light emitting diodes (LEDs) side by side and switching lighting of each light emitting element. Is being developed. ADB is a technology for recognizing a vehicle in front, an oncoming vehicle, a pedestrian, etc. with a vehicle-mounted camera and expanding the driver's forward visibility at night without giving glare to a driver or a pedestrian in front.

By the way, in the vehicular lamp, there is a problem that the cut-off line defined by the front end of the shade becomes too sharp because the light partially cut by the above-described shade is projected in the vehicle traveling direction. .. That is, in the low-beam light distribution pattern, in order to prevent the inclination degree of the luminous intensity cross section (luminous intensity distribution) at a specific position across the cutoff line, which is called the G value, from exceeding the reference value in accordance with the law, the cutoff line of the cutoff line is increased. It is necessary to blur the light and dark boundaries appropriately.

On the other hand, in ADB, since a plurality of light emitting elements serving as a light source are arranged side by side in a plane, when these plurality of light emitting elements are turned on, a dark part (dark) or light corresponding to each gap between adjacent light emitting elements is generated. There was a problem such as streaking.

In order to solve such a problem, the techniques described in Patent Documents 1 and 2 below have been proposed. Specifically, Patent Document 1 discloses a technique of suppressing a chromatic aberration occurring in the vicinity of a cutoff line in a projector lens by regularly arranging a plurality of convex portions or concave portions on the surface of the projector lens. There is.

On the other hand, in Patent Document 2, a vertical cross-sectional shape formed on the incident surface of the projection lens at least in a convex shape or a concave shape with respect to the reference surface of the incident surface is substantially parallel to the horizontal portion at the upper edge of the shade. There is disclosed a technique of blurring the cut-off line while vertically diffusing light emitted to the front of the projection lens by providing a vertical diffusion section for adjusting the cut-off line, which is composed of a lens element extending in the vertical direction.

However, in the technique described in Patent Document 1, the cut-off lines overlap each other, and the irradiation performance on the road surface is significantly deteriorated. On the other hand, in the technique described in Patent Document 2, it is possible to blur the cut-off line in the vertical direction, but in the formation of the light distribution pattern by the above-mentioned ADB, a dark part (dark) or a light corresponding to the gap between the light emitting elements is formed. It is difficult to spread streaks and the like in the left-right direction and blur them.

JP, 2013-93105, A JP, 2008-262755, A

The present invention has been proposed in view of such conventional circumstances, and an object of the present invention is to provide a vehicular lamp that can obtain a good light distribution pattern.

In order to achieve the above object, the present invention provides the following means .
[ 1 ] A first light source that emits a first light,
A first reflecting member that reflects the first light toward a lower side in a vehicle traveling direction;
A second reflecting member that reflects a part of the first light reflected by the first reflecting member toward an upper side in the vehicle traveling direction;
A second light source that is disposed below the second reflecting member and emits second light in the vehicle traveling direction;
A projection lens for projecting the first light and the second light in a vehicle traveling direction,
The second light source has a plurality of light emitting elements arranged side by side in at least a direction corresponding to the vehicle width direction of the two directions corresponding to the vehicle height direction and the vehicle width direction,
The projection lens has a lower region through which the first light reflected by the first reflecting member is directed downward in the vehicle traveling direction, and is directed upward by the second reflecting member in the vehicle traveling direction. An upper region through which the first light reflected by the second light passes and an intermediate region between the lower region and the upper region through which the second light emitted from the second light source passes. home,
A first diffusing surface which is arranged corresponding to the lower region and diffuses the first light in a vehicle height direction and a vehicle width direction;
A second diffusing surface which is arranged corresponding to the upper region and diffuses the first light in a vehicle height direction and a vehicle width direction;
A third diffusing surface that is arranged corresponding to the intermediate region and that diffuses the second light in a vehicle height direction and a vehicle width direction,
The first diffusing surface, the second diffusing surface, and the third diffusing surface each have a plurality of toroidal projections or depressions arranged in the two directions, each having a toroidal curvature. It consists of an uneven surface,
Note and car dual lamp you comprising the any of the curvature of the two directions differ by at least two or more projections or recesses.
[ 2 ] A first light source that emits a first light,
A first reflecting member that reflects the first light toward a lower side in a vehicle traveling direction;
A second reflecting member that reflects a part of the first light reflected by the first reflecting member toward an upper side in the vehicle traveling direction;
A second light source that is disposed below the second reflecting member and emits second light in the vehicle traveling direction;
A projection lens for projecting the first light and the second light in a vehicle traveling direction,
The second light source has a plurality of light emitting elements arranged side by side in at least a direction corresponding to the vehicle width direction of the two directions corresponding to the vehicle height direction and the vehicle width direction,
The projection lens has a lower region through which the first light reflected by the first reflecting member is directed downward in the vehicle traveling direction, and is directed upward by the second reflecting member in the vehicle traveling direction. An upper region through which the first light reflected by the second light passes and an intermediate region between the lower region and the upper region through which the second light emitted from the second light source passes. home,
A first diffusing surface which is arranged corresponding to the lower region and diffuses the first light in a vehicle height direction and a vehicle width direction;
A second diffusing surface which is arranged corresponding to the upper region and diffuses the first light in a vehicle height direction and a vehicle width direction;
A third diffusing surface that is arranged corresponding to the intermediate region and that diffuses the second light in a vehicle height direction and a vehicle width direction,
Car dual than said first diffusion intensity of the first light by diffusing surface and the second diffusion surface of, you wherein said third diffusion intensity of the second light by diffusing surface is smaller Lamp.
[ 3 ] The projection lens has a configuration in which a first lens and a second lens are arranged side by side in this order in a direction opposite to a vehicle traveling direction,
[1] or [2] , wherein the first diffusion surface, the second diffusion surface, and the third diffusion surface are arranged on the front surface of the first lens. Vehicle lighting.
[ 4 ] The first light projected by the projection lens forms a first light distribution pattern including a cutoff line defined by the front end of the second reflecting member at the upper end,
The second light projected by the projection lens forms a second light distribution pattern above the first light distribution pattern,
The vehicle according to any one of [1] to [ 3 ], wherein the light distribution of the second light distribution pattern is variably controlled by switching lighting of the plurality of light emitting elements. Lighting equipment.
[ 5 ] The projection lens has a refraction surface that refracts at least a part of the second light downward from an optical axis of the second light,
The vehicular lamp according to [ 4 ], wherein the second light distribution pattern is formed so as to partially overlap the cutoff line by the light refracted downward by the refraction surface.
[ 6 ] The vehicular lamp according to [ 5 ], wherein the refracting surface is arranged corresponding to a part of the intermediate region.
[ 7 ] The vehicle lamp according to [ 5 ] or [ 6 ], wherein the projection lens has a light diffusing portion that diffuses the second light incident on the refracting surface.
[ 8 ] The vehicle according to [ 7 ], wherein the diffusion intensity of the second light by the light diffusing section is smaller than the diffusion intensity of the second light by the third diffusion surface. Lamp.
[ 9 ] The projection lens has a diffractive surface that diffracts at least a part of the first light toward above the optical axis of the first light,
The vehicular lamp according to any one of [ 4 ] to [ 8 ], wherein the light diffracted by the diffractive surface forms a third light distribution pattern above the cutoff line.
[ 10 ] The vehicular lamp according to [ 9 ], wherein the diffractive surface is arranged corresponding to a peripheral region of the projection lens excluding the center thereof.

As described above, according to the present invention, it is possible to provide a vehicular lamp that can obtain a good light distribution pattern.

It is a perspective view showing the appearance of the vehicular lamp according to the first embodiment of the present invention. FIG. 2 is an exploded perspective view showing the configuration of the vehicle lamp shown in FIG. 1. It is sectional drawing which shows the structure of the vehicle lamp shown in FIG. It is the top view which looked at the projection lens with which the vehicle lamp shown in FIG. 1 was equipped from the front side. It is a top view which shows the structure of the 1st-3rd diffused surface typically. FIG. 3 is a schematic diagram showing a light distribution pattern formed on the surface of a virtual vertical screen by the first light and the second light in the vehicle lamp shown in FIG. 1. It is a luminous intensity distribution chart for comparing the difference of the light distribution pattern for low beams formed on the surface of a virtual vertical screen by the presence or absence of a diffusion surface. 8 is a graph showing a luminous intensity cross section at 2.5R of the low-beam light distribution pattern shown in FIG. 7. It is a luminous intensity distribution chart for comparing the difference of the ADB light distribution pattern formed on the surface of a virtual vertical screen by the presence or absence of a diffusion surface. It is sectional drawing which shows the structure of the vehicle lamp which concerns on the 2nd Embodiment of this invention. FIG. 11 is a schematic diagram showing a light distribution pattern formed on the surface of the virtual vertical screen by the first light and the second light in the vehicular lamp shown in FIG. 10. It is sectional drawing which shows the structure of the vehicle lamp which concerns on the 3rd Embodiment of this invention. It is the perspective view which looked at the 1st lens with which the vehicle lamp shown in FIG. 12 is equipped from the back surface side. It is sectional drawing which shows the structure of the vehicle lamp which concerns on the 4th Embodiment of this invention. It is the front view which looked at the 2nd lens with which the lamp for vehicles shown in a figure is seen from the back surface side.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
In the drawings used in the following description, in order to make each component easy to see, the scale of dimensions may be different depending on the component, and the dimensional ratio of each component is not necessarily the same as the actual one. Absent.

(First embodiment)
As a first embodiment of the present invention, a vehicle lamp 1 shown in FIGS. 1 to 4, for example, will be described. Note that FIG. 1 is a perspective view showing the external appearance of the vehicular lamp 1. FIG. 2 is an exploded perspective view showing the configuration of the vehicular lamp 1 shown in FIG. FIG. 3 is a cross-sectional view showing the configuration of the vehicular lamp 1 shown in FIG. FIG. 4 is a plan view of the projection lens 6 included in the vehicular lamp 1 as viewed from the front side. In the drawings shown below, an XYZ orthogonal coordinate system is set, the X-axis direction is the front-back direction of the vehicle lamp 1, the Y-axis direction is the left-right direction of the vehicle lamp 1, and the Z-axis direction is the vertical direction of the vehicle lamp 1. The directions are shown respectively.

The vehicular lamp 1 of the present embodiment serves as a vehicular headlamp (headlight) and irradiates a passing beam (low beam) and a traveling beam (high beam) in the vehicle traveling direction. The vehicle lamp 1 is a variable light distribution headlamp (ADB) that variably controls the light distribution of a traveling beam (high beam).

Specifically, as shown in FIGS. 1 to 3, the vehicular lamp 1 includes a low beam (LB) light source unit (first light source) 2, a reflector (first reflecting member) 3, and a separator ( A second reflecting member) 4, an ADB light source unit (second light source) 5, and a projection lens 6 are provided. These are integrally attached to the housing 7 that serves as a heat sink. A cooling fan 8 is attached to the housing 7 via a housing 9.

In the vehicular lamp 1, the light source units 2 and 5 are cooled by radiating the heat generated by the light source units 2 and 5 from the housing (heat sink) 7 while blowing air with the cooling fan 8.

The LB light source unit 2 is a first light source that emits the first light L1 that serves as a low beam. The LB light source unit 2 uses an LED module in which an LED is mounted in a package. An LED emitting white light is used for the LED module. Further, as the LED, a high output type LED for vehicle lighting is used.

The LB light source unit 2 is attached to the upper surface 7a of the housing 7 via heat conductive grease (not shown) while being held by the light source holder 2a. As a result, the LB light source unit 2 radially emits the first light L1 upward (+Z direction).

In addition to the above-described LED, a light emitting element such as a laser diode (LD) can be used for the LB light source unit 2. Further, a light source other than the light emitting element described above may be used. Further, the number of light emitting elements is not limited to one and may be plural.

The reflector 3 is made of a reflective member such as aluminum die cast as the first reflective member. The reflector 3 is attached to the upper surface 7 a of the housing 7 so as to cover the LB light source unit 2 from above. In the cross section (X-axis cross section) along the vehicle front-rear direction (X-axis direction), the reflector 3 extends from the base end (rear end) side toward the front end (front end) side of the center of the LB light source unit 2 ( It is formed to be curved so as to draw a parabola whose focal point is the light emitting point). The surface (inner surface) of the reflector 3 facing the LB light source unit 2 is a reflecting surface. The reflector 3 reflects the first light L1 emitted from the LB light source unit 2 toward the vehicle traveling direction (+X axis direction) by the reflecting surface.

The separator 4 is made of a reflective member such as aluminum die cast as the second reflective member. The separator 4 includes an opening 4a for exposing the ADB light source unit (second light source) 5 to the front, an upper shade 4b protruding forward from a position along the upper end of the opening 4a, and an opening of the opening 4a. It has a lower shade 4c protruding forward from a position along the lower end. The separator 4 is attached to the front surface 7b of the housing 7 so that the upper shade 4b is located in front of the upper surface 7a of the housing 7.

As a result, the upper surface of the upper shade 4b of the separator 4 reflects a part of the first light L1 reflected by the reflector 3 toward the upper side in the vehicle traveling direction. The lower surface of the upper shade 4b and the upper surface of the lower shade 4c reflect the second light L2 emitted from the ADB light source unit 5 through the opening 4a toward the projection lens 6.

The ADB light source unit 5 is a second light source that emits the second light L2 that becomes an ADB beam (high beam). The ADB light source unit 5 has a structure in which a plurality of LEDs (light emitting elements) that emit white light are mounted on the surface of the circuit board. The plurality of LEDs are at least the direction corresponding to the vehicle width direction (left-right direction) of the two directions in the plane of the circuit board corresponding to the vehicle height direction (vertical direction) and the vehicle width direction (left-right direction). Are arranged side by side.

Specifically, the ADB light source unit 5 of this embodiment has a configuration in which 12 LEDs are arranged side by side at equal intervals in the left-right direction (Y-axis direction). The ADB light source unit 5 may have a configuration in which a plurality of LEDs are arranged side by side in a matrix in the vertical direction (Z axis direction) and the horizontal direction (Y axis direction).

The ADB light source unit 5 is attached to the front surface 7b of the housing 7 via heat conductive grease (not shown) so that the plurality of LEDs are arranged in a position facing the front from the opening 4a of the separator 4. .. In addition to the above-described LEDs, light emitting elements such as LDs may be used as the plurality of light emitting elements forming the ADB light source unit 5.

The projection lens 6 constitutes a compound lens in which a first lens 10 and a second lens 11 are arranged side by side in this order in a direction opposite to the vehicle traveling direction (-X axis direction). .. Among these, in the first lens 10, the front surface 10a is a lens surface (convex surface) and the rear surface 10b is a flat surface. On the other hand, in the second lens 11, the front surface 11a is a flat surface and the rear surface 11b is a lens surface (convex surface).

The first lens 10 and the second lens 11 are sandwiched between the retainer 12 on the front surface side and the lens holder 13 on the rear surface side, and their outer peripheral portions are held by the retainer 12 and the lens holder 13. By doing so, they are integrally arranged as the projection lens 6. The projection lens 6 is arranged in front of the reflector 3 and the separator 4 by attaching the retainer 12 and the lens holder 13 to the front surface 7b of the housing 7. The projection lens 6 magnifies and projects the first light L1 and the second light L2 in the vehicle traveling direction (+X axis direction).

As shown in FIGS. 3 and 4, the projection lens 6 includes a lower region E1 through which the first light L1a (L1) reflected by the reflector 3 toward the lower side in the vehicle traveling direction passes, and an upper shade 4b. The ADB light source unit 5 is located between the upper region E2 and the lower region E1 and the upper region E2 through which the first light L1b (L1) reflected by the upper surface toward the upper side in the vehicle traveling direction passes. Of the intermediate region E3 through which the second light L2 emitted forward from passes, the first diffusion surface 14a arranged corresponding to the lower region E1 and the intermediate region E3 arranged corresponding to the upper region E2. It also has a second diffusion surface 14b and a third diffusion surface 14c arranged corresponding to the intermediate region E3.

The first diffusing surface 14a, the second diffusing surface 14b, and the third diffusing surface 14c are arranged on the front surface 10a of the first lens 10. The first diffusing surface 14a, the second diffusing surface 14b, and the third diffusing surface 14c have curvatures in two directions (vertical direction and lateral direction) corresponding to the vehicle height direction and the vehicle width direction, respectively. In addition, a plurality of toroidal convex portions are formed on the uneven surface arranged in a matrix. Further, each of the diffusion surfaces 14c, 14b, 14c is configured to include at least two types of convex portions having different curvatures in either of two directions (vertical direction and horizontal direction).

Specifically, the configurations of these first to third diffusion surfaces 14a to 14c are schematically shown in FIGS. 5A is a plan view schematically showing the configuration of the first diffusion surface 14a, and FIG. 5B is a plan view schematically showing the configuration of the second diffusion surface 14b. FIG. 7C is a plan view schematically showing the configuration of the third diffusion surface 14c.

As shown in FIG. 5A, two types of convex portions 15a and 15b having different curvatures in the left-right direction (Y-axis direction) are alternately arranged in the left-right direction (Y-axis direction) on the first diffusion surface 14a. The convex portions 15a and 15b are arranged in the same row in the vertical direction (Z-axis direction). This makes it possible to diffuse the first light L1a incident on the first diffusing surface 14a in the vehicle height direction (Z axis direction) and the vehicle width direction (Y axis direction).

On the other hand, as shown in FIG. 5B, the second diffusing surface 14b has two types of convex portions 15a, 15b having different curvatures in the left-right direction (Y-axis direction), like the first diffusing surface 14a. The protrusions 15a and 15b are arranged alternately in the left-right direction (Y-axis direction), and are arranged in the same line in the up-down direction (Z-axis direction). Thereby, the first light L1b incident on the second diffusing surface 14b can be diffused in the vehicle height direction (Z axis direction) and the vehicle width direction (Y axis direction).

On the other hand, on the third diffusing surface 14c, as shown in FIG. 5C, four types of convex portions 15c having different curvatures in the left-right direction (Y-axis direction) and the vertical direction (Z-axis direction), 15d, 15e, and 15f are alternately arranged in the horizontal direction (Y-axis direction) and the vertical direction (Z-axis direction). As a result, the second light L2 incident on the third diffusing surface 14c can be diffused in the vehicle height direction (Z axis direction) and the vehicle width direction (Y axis direction).

In the projection lens 6, the second light L2 from the third diffusing surface 14c is more than the diffusion intensity (D1) of the first light L1 (L1a, L1b) from the first diffusing surface 14a and the second diffusing surface 14b. The type, curvature, arrangement ratio, etc. of the respective convex portions 15a to 15f are set so that the diffusion intensity (D2) of (3) becomes smaller (D1>D2).

Regarding the type and curvature of each of the convex portions 15a to 15f, the arrangement ratio, and the like, the diffusion intensity (D1) of the first light L1 (L1a, L1b) and the diffusion intensity (D2) of the second light L2 that are set are set. ), it can be changed appropriately. Further, it is also possible to make the respective diffusion strengths different between the first diffusion surface 14a and the second diffusion surface 14b.

In the vehicular lamp 1 having the above-described configuration, the first light L1 and the second light L2 emitted in front of the projection lens 6 are projected onto the virtual vertical screen directly facing the projection lens 6. A light source image at this time (light distribution patterns P1 and P2 by the first light L1 and the second light L2) is schematically shown in FIG.

The first light L1 projected by the projection lens 6 is reversely projected as a beam for passing (low beam) on a light source image formed in the vicinity of the rear focus of the projection lens 6, and the upper shade 4b (separator) is formed on the upper end. A low beam (LB) light distribution pattern (first light distribution pattern) P1 including a cutoff line CL defined by the front end of 4) is formed.

On the other hand, the second light L2 projected by the projection lens 6 is located above the LB light distribution pattern P1 as an ADB beam (traveling beam), and has the ADB light distribution pattern (second light distribution). Pattern) P2 is formed. Further, by switching the lighting of each LED, it is possible to variably control the light distribution of the ADB light distribution pattern P2.

In the vehicular lamp 1 of the present embodiment, the first light L1 (L1a, L1b) incident on the first diffusing surface 14a and the second diffusing surface 14b described above is diffused in the vehicle height direction (vertical direction). This makes it possible to obtain a good LB light distribution pattern P1 while appropriately blurring the light-dark boundary of the cut-off line CL and preventing the G value from exceeding the reference value in accordance with the regulations.

In particular, in the vehicular lamp 1 of the present embodiment, the cut-off line CL is reduced by providing the first diffusion surface 14a and the second diffusion surface 14b with two or more types of convex portions 15a and 15b having different curvatures described above. It is possible to prevent double overlapping.

Further, in the vehicle lamp 1 of the present embodiment, the first light L1 (L1a, L1b) incident on the first diffusing surface 14a and the second diffusing surface 14b described above is diffused in the vehicle width direction (lateral direction). It is also possible to let. In this case, it is possible to obtain good light distribution patterns L1 and L2 by improving the connection with the third diffusion surface 14c that diffuses the second light L2 in the vehicle width direction (horizontal direction).

Here, the light source image (LB light distribution pattern P1) when the first light L1 emitted in front of the projection lens 6 is projected onto the virtual vertical screen facing the projection lens 6 is shown in FIG. In the case where the first to third diffusion surfaces 14a, 14b and 14c shown in FIG. 7A are provided, and in the case where the first to third diffusion surfaces 14a, 14b and 14c shown in FIG. 7B are not provided. Were compared. FIG. 8 shows a luminous intensity cross section at 2.5R in the LB light distribution pattern P1 shown in FIGS. 7(a) and 7(b). In addition, the solid line shown in FIG. 8 shows the case where the 1st-3rd diffusion surfaces 14a, 14b, 14c are provided, and the broken line shown in FIG. 8 shows the 1st-3rd diffusion surfaces 14a, 14b, The case where 14c is provided is shown.

In this simulation, the height dimension of the lower region E1 shown in FIG. 4 was 11 mm, the height dimension of the upper region E2 was 8.2 mm, and the height dimension of the intermediate region E3 was 43.8 mm. The radius of curvature of the convex portion 15a shown in FIGS. 5A to 5C in the horizontal direction is 32 mm, the radius of curvature in the vertical direction is 30 mm, the radius of curvature of the convex portion 15b in the horizontal direction is 27 mm, and the radius of curvature in the vertical direction. Is 30 mm, the radius of curvature of the convex portion 15c in the horizontal direction is 32 mm, the radius of curvature in the vertical direction is 25 mm, the radius of curvature in the horizontal direction of the convex portion 15d is 32 mm, and the radius of curvature in the vertical direction is 13 mm. The radius of curvature in the left-right direction was 27 mm, the radius of curvature in the up-down direction was 25 mm, the radius of curvature in the left-right direction of the protrusion 15 f was 27 mm, and the radius of curvature in the up-down direction was 13 mm.

As shown in FIGS. 7A, 7B, and 8, when the first to third diffusion surfaces 14a, 14b, and 14c are provided, the first to third diffusion surfaces 14a, 14b, and 14c are The degree of inclination of the G value can be made gentle as compared with the case where the cutoff line CL is not provided, and the light/dark boundary of the cutoff line CL can be appropriately blurred.

On the other hand, in the vehicular lamp 1 of the present embodiment, the second light L2 incident on the third diffusing surface 14c described above is diffused in the vehicle width direction (left-right direction) to correspond to each gap between the adjacent LEDs. It is possible to obtain a good ADB light distribution pattern P2 while preventing the occurrence of such dark areas (dark areas) and streaks of light.

In particular, in the vehicle lamp 1 of the present embodiment, the third diffusion surface 14c is provided with two or more types of convex portions 15c to 15f having different curvatures described above, so that the vehicle height direction of the ADB light distribution pattern P2 is increased. It is possible to keep the luminosity in the (vertical direction) and the vehicle width direction (horizontal direction) more uniform.

In addition, in the vehicular lamp 1 of the present embodiment, it is also possible to diffuse the second light L2 incident on the above-described third diffusing surface 14c in the vehicle height direction (vertical direction). In this case, the connection with the first diffusion surface 14a and the second diffusion surface 14b for diffusing the first light L1 (L1a, L1b) in the vehicle height direction (vertical direction) is improved, and good light distribution is achieved. It is possible to obtain the patterns L1 and L2.

Here, a light source image (ADB light distribution pattern P2) obtained by projecting the second light L2 emitted in front of the projection lens 6 onto the virtual vertical screen facing the projection lens 6 is shown in FIG. In the case where the first to third diffusion surfaces 14a, 14b and 14c shown in FIG. 9A are provided and in the case where the first to third diffusion surfaces 14a, 14b and 14c shown in FIG. 9B are not provided. Were compared.

As shown in FIGS. 9A and 9B, when the first to third diffusion surfaces 14a, 14b and 14c are provided, the first to third diffusion surfaces 14a, 14b and 14c are not provided. Compared with the case, the generation of dark portions (dark) and light stripes corresponding to the gaps between adjacent LEDs is suppressed, and the vehicle height direction (vertical direction) and vehicle width direction (left and right) of the ADB light distribution pattern P2 are suppressed. It is possible to keep the luminosity in the (direction) more uniform.

The present invention is not necessarily limited to the above-mentioned embodiment, and various modifications can be made without departing from the spirit of the present invention.
Specifically, for the first and second diffusing surfaces 14a and 14b, in order to blur the cutoff line CL of the LB light distribution pattern P1 described above, the first light L1 (L1a, L1b) is at least the vehicle height. It may be configured to diffuse in the direction (vertical direction). On the other hand, with respect to the third diffusing surface 14c, the second light L2 is emitted in order to prevent the occurrence of dark portions (dark) or light stripes corresponding to the gaps between the adjacent LEDs of the ADB light distribution pattern P2 described above. It may be configured to diffuse at least in the vehicle width direction (left-right direction).

However, in order to improve the connection between the first light L1 (L1a, L1b) diffused by the first to third diffusion surfaces 14a, 14b, 14c and the second light L2, as in the above embodiment. In the first to third diffusion surfaces 14a, 14b, 14c, the first light L1 (L1a, L1b) and the second light L2 are respectively passed in the vehicle height direction (vertical direction) and the vehicle width direction (left and right). It is preferable to have a structure in which the light is diffused in the direction).

Further, the projection lens 6 is composed of a compound lens in which the above-mentioned two lenses (the first lens 10 and the second lens 11) are combined, but the number of combined lenses may be further increased. It is possible. On the other hand, by using an aspherical lens or the like, the number of lenses forming the projection lens 6 can be reduced (in some cases, one lens can be used).

Therefore, the first to third diffusing surfaces 14a, 14b, 14c are not necessarily limited to the configuration arranged on the front surface 10a of the first lens 10 described above, and a plurality of projection lenses 6 are configured. Among these lenses, it is possible to arrange them on one surface of any of the lenses where the first to third diffusion surfaces 14a, 14b, 14c can be arranged.

Further, regarding the first to third diffusion surfaces 14a, 14b, 14c, instead of arranging the plurality of convex portions 15a to 15f described above side by side, a toroidal having a curvature in two directions (up and down direction and left and right direction). It is also possible to adopt a configuration in which a plurality of shaped concave portions are arranged side by side.

In the above embodiment, the front surface 10a of the first lens 10 described above is a convex surface (lens surface), so the first to third diffusion surfaces 14a, 14b, 14c arranged on the front surface 10a are It is preferable to form the plurality of convex portions 15a to 15f described above in processing the convex surface.

Further, the plurality of convex portions or concave portions forming the first to third diffusing surfaces 14a, 14b, 14c are not limited to the toroidal shape described above, and the first light L1 and the second light L2 are transmitted to the vehicle height. It is also possible to have another shape for diffusing in the vertical direction (vertical direction) and the vehicle width direction (horizontal direction).

(Second embodiment)
Next, as a second embodiment of the present invention, a vehicle lamp 1A shown in FIG. 10, for example, will be described. Note that FIG. 10 is a cross-sectional view showing the configuration of the vehicle lamp 1A. In addition, in the following description, description of the same parts as those of the vehicle lamp 1 will be omitted, and the same reference numerals will be given in the drawings.

The vehicular lamp 1A of the present embodiment has, in addition to the configuration of the vehicular lamp 1, a refracting surface that refracts at least a part of the second light L2 downward from the optical axis of the second light L2. 16 is provided.

Specifically, the refracting surface 16 is arranged on the rear surface 10b of the first lens 10. The refraction surface 16 is formed as a forwardly inclined surface by cutting out a part of the rear surface 10b of the first lens 10 corresponding to the partial area E4 of the intermediate area E3. As a result, the second light L2 that has entered the refracting surface 16 can be refracted as the third light L3 downward from the optical axis of the second light L2.

In the case of this configuration, as schematically shown in FIG. 11, by the third light L3 refracted downward by the refracting surface 16, the ADB that partially overlaps the cutoff line CL is provided above the LB light distribution pattern P1. It is possible to form the light distribution pattern P2 for use.

Therefore, in the vehicle lighting device 1A of the present embodiment, a dark portion (a region where light is not irradiated) corresponding to the thickness of the upper shade 4b (separator 4) is provided between the LB light distribution pattern P1 and the ADB light distribution pattern P2. It is possible to obtain good light distribution patterns P1 and P2 without generating

(Third Embodiment)
Next, as a third embodiment of the present invention, a vehicle lamp 1B shown in, for example, FIGS. 12 and 13 will be described. Note that FIG. 12 is a cross-sectional view showing the configuration of the vehicle lamp 1B. FIG. 13 is a perspective view of the first lens 10 viewed from the rear surface 10b side. Further, in the following description, the same parts as those of the vehicle lamps 1, 1A will be omitted and the same reference numerals will be given in the drawings.

The vehicular lamp 1B of the present embodiment has a configuration in which, in addition to the configuration of the vehicular lamp 1A, a light diffusing section 17 that diffuses the light L2 incident on the refracting surface 16 is provided. Specifically, the light diffusion portion 17 is composed of a plurality of convex surfaces formed on the refraction surface 16. Further, the diffusion intensity (D3) of the second light L2 by the light diffusion unit 17 is set to be smaller than the diffusion intensity (D2) of the second light by the third diffusion surface (D2>). D3).

In the present embodiment, the light diffusing portion 17 is formed of a plurality of convex surfaces for the sake of convenience of molding with a mold. However, when the light diffusion portion 17 is formed by a method other than molding with a mold, the light diffusing portion 17 is limited to the above-described convex surface. Alternatively, it is possible to form a plurality of concave surfaces by, for example, dimple processing.

In the vehicular lamp 1B of the present embodiment, by providing such a light diffusing portion 17, the light L2 (third light L3) incident on the refracting surface 16 is directed in the vehicle height direction (vertical direction) and the vehicle width direction. It is possible to diffuse over (left and right direction).

As described above, in the vehicle lamp 1B of the present embodiment, the light diffusing unit 17 diffuses the second light L2 (third light L3) incident on the refracting surface 16 in the vertical direction (Z-axis direction). Thus, the connection at the boundary between the LB light distribution pattern P1 and the ADB light distribution pattern P2 can be improved. In addition, the connection between the first light L1 and the second light L2 passing through the lower region E1 and the upper region E2 of the projection lens 6 and the second light L2 passing through the intermediate region E3 of the projection lens 6 is improved. Therefore, it is possible to obtain good light distribution patterns P1 and P2.

Further, in this vehicle lamp 1B, the light diffusing section 17 diffuses the second light L2 (third light L3) incident on the refracting surface 16 in the left-right direction (Y-axis direction), thereby It is possible to improve the connection of each segment (irradiation area of the light emitted from each LED) in the width direction (Y-axis direction) of the ADB light distribution pattern P2 compared to the case where 17 is not provided.

In the above embodiment, the light diffusing unit 17 diffuses the second light L2 (third light L3) incident on the refracting surface 16 in the left-right direction (Y-axis direction) and the up-down direction (Z-axis direction). Although it is configured, it is not necessarily limited to such a configuration. In some cases, the light diffusing section 17 diffuses the second light L2 (third light L3) incident on the refracting surface 16 only in the vertical direction (Z-axis direction), or the light diffusing section 17 spreads on the refracting surface 16. It is also possible to adopt a configuration in which the incident second light L2 (third light L3) is diffused only in the left-right direction (Y-axis direction).

(Fourth Embodiment)
Next, as a fourth embodiment of the present invention, a vehicle lamp 1C shown in FIGS. 14 and 15, for example, will be described. Note that FIG. 14 is a cross-sectional view showing the configuration of the vehicle lamp 1C. FIG. 15 is a front view of the second lens 11 viewed from the rear surface 11b side. Further, in the following description, the same parts as those of the vehicle lamps 1, 1A, 1B will be omitted and the same reference numerals will be given in the drawings.

The vehicle lamp 1C of the present embodiment has a part of the first light L1 (hereinafter, referred to as a fourth light L4) in addition to the configuration of the vehicle lamp 1 (or the vehicle lamps 1A and 1B). This is a configuration in which a diffractive surface 18 that diffracts upward of the optical axis of the first light L1 is provided. Specifically, the diffractive surface 18 is arranged in the peripheral area E5 of the rear surface 11b of the second lens 11 excluding its center. The diffractive surface 18 is composed of a diffractive optical element (DOE) formed in the peripheral area E5.

In the case of this configuration, the overhead (OH) light distribution pattern (the third light distribution) is provided above the cutoff line CL by the fourth light L4 of the first light L1 that is diffracted upward by the diffraction surface 18. Light pattern) can be formed.

Further, by changing the ratio of the DOE (diffraction surface 18) arranged in the peripheral region E5, it is possible to adjust the light amount of the fourth light L4 forming the OH light distribution pattern. That is, if the ratio of the DOE (diffraction surface 18) arranged in the peripheral region E5 is increased, the light amount of the fourth light L4 can be relatively increased, while if the ratio is decreased, the fourth light L4 is increased. The light amount of L4 can be relatively reduced.

Furthermore, when the diffractive surface 18 is provided, it is possible to reduce color unevenness (chromatic aberration) that occurs in the width direction (Y-axis direction) of each segment of the ADB light distribution pattern P2.

1, 1A, 1B, 1C...Vehicle lamp 2... Low beam (LB) light source unit (first light source) 3... Reflector (first reflecting member) 4... Separator (second reflecting member) 5... ADB Light source unit (second light source) 6... Projection lens 7... Housing (heat sink) 8... Cooling fan 9... Housing 10... First lens 11... Second lens 12... Retainer 13... Lens holder 14a... First Diffusion surface 14b...Second diffusion surface 14c...Third diffusion surface 15a to 15f...Convex portion 16...Refraction surface 17...Light diffusion portion 18...Diffraction surface E1...Lower area E2...Upper area E3...Intermediate area E4...Middle area Partial region E5... Peripheral region P1... Low beam (LB) light distribution pattern (first light distribution pattern) P2... ADB light distribution pattern (second light distribution pattern) CL... Cutoff line L1... First Light (passing beam (low beam)) L2...second light (ADB beam (traveling beam)) L3...third light L4...fourth light

Claims (10)

A first light source for emitting a first light;
A first reflecting member that reflects the first light toward a lower side in a vehicle traveling direction;
A second reflecting member that reflects a part of the first light reflected by the first reflecting member toward an upper side in the vehicle traveling direction;
A second light source that is disposed below the second reflecting member and emits second light in the vehicle traveling direction;
A projection lens for projecting the first light and the second light in a vehicle traveling direction,
The second light source has a plurality of light emitting elements arranged side by side in at least a direction corresponding to the vehicle width direction of the two directions corresponding to the vehicle height direction and the vehicle width direction,
The projection lens has a lower region through which the first light reflected by the first reflecting member is directed downward in the vehicle traveling direction, and is directed upward by the second reflecting member in the vehicle traveling direction. An upper region through which the first light reflected by the second light passes and an intermediate region between the lower region and the upper region through which the second light emitted from the second light source passes. home,
A first diffusing surface which is arranged corresponding to the lower region and diffuses the first light in a vehicle height direction and a vehicle width direction;
A second diffusing surface which is arranged corresponding to the upper region and diffuses the first light in a vehicle height direction and a vehicle width direction;
Wherein are arranged corresponding to the intermediate region, we have a third diffusion surface diffusing the second light in the vehicle height direction and the vehicle width direction,
The first diffusing surface, the second diffusing surface, and the third diffusing surface each have a plurality of toroidal projections or depressions arranged in the two directions, each having a curvature in the two directions. It consists of an uneven surface,
Further , the vehicular lamp includes at least two kinds of convex portions or concave portions having different curvatures in either of the two directions . A first light source for emitting a first light;
A first reflecting member that reflects the first light toward a lower side in a vehicle traveling direction;
A second reflecting member that reflects a part of the first light reflected by the first reflecting member toward an upper side in the vehicle traveling direction;
A second light source that is disposed below the second reflecting member and emits second light in the vehicle traveling direction;
A projection lens for projecting the first light and the second light in a vehicle traveling direction,
The second light source has a plurality of light emitting elements arranged side by side in at least a direction corresponding to the vehicle width direction of the two directions corresponding to the vehicle height direction and the vehicle width direction,
The projection lens has a lower region through which the first light reflected by the first reflecting member is directed downward in the vehicle traveling direction, and is directed upward by the second reflecting member in the vehicle traveling direction. An upper region through which the first light reflected by the second light passes and an intermediate region between the lower region and the upper region through which the second light emitted from the second light source passes. home,
A first diffusing surface which is arranged corresponding to the lower region and diffuses the first light in a vehicle height direction and a vehicle width direction;
A second diffusing surface which is arranged corresponding to the upper region and diffuses the first light in a vehicle height direction and a vehicle width direction;
Wherein are arranged corresponding to the intermediate region, we have a third diffusion surface diffusing the second light in the vehicle height direction and the vehicle width direction,
A vehicle lamp characterized in that a diffusion intensity of the second light by the third diffusion surface is smaller than a diffusion intensity of the first light by the first diffusion surface and the second diffusion surface. .. The projection lens has a configuration in which a first lens and a second lens are arranged side by side in this order in a direction opposite to a vehicle traveling direction,
The vehicular lamp according to claim 1 or 2 , wherein the first diffusing surface, the second diffusing surface, and the third diffusing surface are arranged on the front surface of the first lens. .. The first light projected by the projection lens forms a first light distribution pattern including a cut-off line defined by a front end of the second reflecting member at an upper end,
The second light projected by the projection lens forms a second light distribution pattern above the first light distribution pattern,
By switching the lighting of the plurality of light emitting elements, vehicular lamp according to any one of claim 1 to 3, characterized in that the light distribution of the second light distribution pattern is variably controlled. The projection lens has a refraction surface that refracts at least a part of the second light downward from an optical axis of the second light,
The vehicular lamp according to claim 4 , wherein the second light distribution pattern is formed so as to partially overlap with the cutoff line by the light refracted downward by the refraction surface. The vehicular lamp according to claim 5 , wherein the refraction surface is arranged corresponding to a part of the intermediate region. The vehicular lamp according to claim 5 or 6 , wherein the projection lens has a light diffusing portion that diffuses the second light that has entered the refracting surface. 8. The vehicular lamp according to claim 7 , wherein the diffusion intensity of the second light by the light diffusion portion is smaller than the diffusion intensity of the second light by the third diffusion surface. The projection lens has a diffractive surface that diffracts at least a part of the first light upward from an optical axis of the first light,
The light diffracted by the diffraction surface, the vehicle lighting device according to any one of claims 4-8, characterized in that to form the third light distribution pattern above the cut-off line. The vehicular lamp according to claim 9 , wherein the diffractive surface is arranged corresponding to a peripheral region excluding the center of the projection lens.