JP7302233B2 - vehicle headlight - Google Patents

Description

The present invention relates to a vehicle headlamp.

It has a light source and a plurality of segments that are arranged side by side in the left-right direction in the vehicle-mounted state via a dividing line. 2. Description of the Related Art A vehicle headlamp is known that includes a reflector provided with a reflective surface that forms irradiation patterns of different shapes.

JP 2015-149173 A

In recent years, a reflector for a vehicle headlamp as described above is manufactured by forming a main body member from a resin material and forming a metal film, which serves as a reflective surface, on the main body member by vapor deposition. In such a reflector, a step is formed at the dividing line between the segments, and the light reflected by the step may be diffused and become glare light.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a vehicle headlamp capable of suppressing glare light.

A vehicle headlamp according to the present invention includes a light source and a reflector provided with a reflecting surface for reflecting light from the light source, the light source having a rectangular light emitting surface, and the reflector comprising: A reflective film forming the reflective surface is disposed on a main body member formed using a resin material, and the reflective surface includes a plurality of reflective surfaces that are arranged side by side in the left-right direction via a dividing line in a vehicle-mounted state. having segments, the light from the light source is reflected by each of the plurality of segments to form irradiation patterns with different shapes in a front irradiation region in a state of being mounted on a vehicle, and an oblique cutoff line is included among the plurality of segments. One of the dividing lines in the left-right direction of the oblique cut-off segments forming the irradiation pattern is inclined with respect to the up-down direction in the mounted state of the vehicle.

Further, the light emitting surface may be arranged such that two parallel sides facing each other in the front-rear direction in the vehicle-mounted state are inclined with respect to the left-right direction in the vehicle-mounted state.

Further, in the reflector, the other dividing line in the left-right direction of the oblique cut-off segment may be parallel to the up-down direction when the reflector is mounted on the vehicle.

Further, in the reflector, one of the dividing lines in the left-right direction of the horizontal cut-off segment forming the irradiation pattern including the horizontal cut-off line among the plurality of segments may be inclined with respect to the up-down direction.

Further, the oblique cutoff segment and the horizontal cutoff segment may be arranged in the vertical direction, and the dividing line of each segment inclined with respect to the vertical direction may be arranged on one line.

Further, the oblique cutoff segment may be arranged at a position farthest from the light source in the vertical direction, and the horizontal cutoff segment may be arranged at a position closest to the light source in the vertical direction.

ADVANTAGE OF THE INVENTION According to this invention, the vehicle headlamp which can suppress glare light can be provided.

FIG. 1 is a front view showing an example of a vehicle headlamp according to this embodiment. FIG. 2 is a cross-sectional view showing an example of the vehicle headlamp according to this embodiment. FIG. 3 is a plan view showing an example of the vehicle headlamp according to this embodiment. FIG. 4 is a diagram showing an example of a first irradiation pattern formed by the first segment. FIG. 5 is a diagram showing an example of a second irradiation pattern formed by the second segment. FIG. 6 is a diagram showing an example of a third irradiation pattern formed by the third segment. FIG. 7 is a diagram showing an example of a fourth irradiation pattern formed by the fourth segment. FIG. 8 is a diagram showing an example of a fifth irradiation pattern formed by the fifth segment. FIG. 9 is a diagram showing an example of a sixth irradiation pattern formed by the sixth segment. FIG. 10 is a diagram showing an example of a low beam pattern formed by reflectors.

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a vehicle headlamp according to the present invention will be described below with reference to the drawings. In addition, this invention is not limited by this embodiment. In addition, components in the following embodiments include components that can be easily replaced by those skilled in the art, or components that are substantially the same. In the following description, front and rear (front, rear), up and down (up, down), left and right (left, right) directions are directions when the vehicle headlamp is attached to the vehicle, Indicates the direction when looking at the front while sitting in the driver's seat. In this embodiment, the up-down direction is parallel to the vertical direction, and the left-right direction is the horizontal direction.

1 to 3 are diagrams showing an example of a vehicle headlamp 100 according to this embodiment. 1 is a front view, FIG. 2 is a cross-sectional view including the light source 10 in FIG. 1, and FIG. 3 is a plan view. As shown in FIGS. 1 to 3 , vehicle headlamp 100 has light source 10 and reflector 20 . In this embodiment, the vehicle headlamp 100 is a reflector type lamp that is used as a vehicle headlamp and forms a low beam irradiation pattern in front of the vehicle. The vehicle headlamps 100 are attached, for example, to the left and right front portions of the vehicle. For example, the vehicle headlamp 100 can have the same configuration on the left and right, instead of being symmetrical on the left and right.

The light source 10 is a semiconductor light source such as an LED, an OEL, or an OLED (organic EL) in this embodiment. The light source 10 has a light emitting surface 11 that emits light L (see FIG. 2) so as to form a Lambertian distribution. When the vehicle headlamp 100 is attached to a vehicle, the light emitting surface is directed downward, for example, and arranged parallel to a horizontal plane. The light source 10 is fixed to the mounting member 30, for example.

As shown in FIG. 3, the light source 10 has a rectangular light emitting surface 11 . Two parallel sides of the light emitting surface 11 of the light source 10 facing each other in the front-rear direction are arranged in a state inclined with respect to a straight line M1 (see FIG. 3) parallel in the left-right direction. In this case, the tilt angle θ1 can be set to, for example, 10° or more and 20° or less.

The reflector 20 reflects the light from the light source 10 toward the front of the vehicle. The reflector 20 is arranged below the light source 10 . The reflector 20 has a structure in which a reflecting film 20F forming a reflecting surface 20R is arranged on a main body member 20B made of, for example, a resin material. The reflective film 20F is formed by vapor deposition or the like, for example. The reflector 20 is fixed to the mounting member 30 by a fixing member or the like.

A reflecting surface 20</b>R is formed on the inner surface of the reflector 20 . The reflecting surface 20R is partitioned into a plurality of segments. In this embodiment, the reflective surface 20R has at least six segments. These six segments are hereinafter referred to as a first segment 21, a second segment 22, a third segment 23, a fourth segment 24, a fifth segment 25, and a sixth segment 26. FIG.

The six segments 21 to 26 are divided by dividing lines L1 to L4 parallel to the vertical direction and dividing lines L5 to L8 parallel to the horizontal direction when viewed from the front. Among them, the three segments of the first segment 21, the second segment 22 and the third segment 23 are arranged side by side in the vertical direction. Also, the two segments, the fourth segment 24 and the sixth segment 26, are arranged side by side in the vertical direction. The three segments 21 to 23, the two segments 24 and 26, and the fifth segment 25 are arranged side by side in the horizontal direction.

A dividing line L1 separates the three segments 21-23 and the two segments 24,26. The dividing line L1 is parallel to the vertical direction. A dividing line L1 is formed across the three segments 21-23. That is, the first segment 21, the second segment 22, and the third segment 23 are arranged such that the right dividing lines in the left-right direction are on one line. Moreover, the dividing line L1 is formed across the two segments 24 and 26 . That is, the fourth segment 24 and the sixth segment 26 are arranged such that the right dividing line in the left-right direction is on one line.

A dividing line L2 separates the three segments 21-23 and the fifth segment 25. FIG. The dividing line L2 is inclined with respect to the straight line M2 parallel to the vertical direction. The inclination angle θ2 of the dividing line L2 with respect to the straight line M2 can be about half the angle of the oblique cutoff line of the low beam pattern formed in front of the vehicle. In this embodiment, the angle of the oblique cut-off line is about 15°. Therefore, the inclination angle θ2 can be, for example, 6° or more and 8° or less. The angle range of the tilt angle θ2 is not limited to the above.

A dividing line L2 is formed across the three segments 21-23. That is, the first segment 21, the second segment 22, and the third segment 23 are arranged such that the left dividing lines in the horizontal direction are arranged on one line.

The dividing line L3 is arranged at the right end of the fifth segment 25 . That is, the fifth segment 25 is partitioned by the dividing line L2 and the dividing line L3. The dividing line L3 is inclined with respect to the straight line M3 parallel to the vertical direction. The inclination angle θ3 of the dividing line L3 with respect to the straight line M3 can be about half the angle of the horizontal cutoff line of the low beam pattern formed in front of the vehicle. The inclination angle θ3 can be, for example, 6° or more and 8° or less as described above. The angle range of the tilt angle θ3 is not limited to the above. Also, the tilt angle θ2 and the tilt angle θ3 may have different values.

A dividing line L4 is located at the left end of the two segments 24,26. In other words, the two segments 24 and 26 are divided by the dividing line L1 and the dividing line L4 in the horizontal direction.

A dividing line L5 partitions the first segment 21 and the second segment 22 . A parting line L6 partitions the second segment 22 and the third segment 23 . A dividing line L7 is arranged at the lower end of the fourth segment 24 . A dividing line L8 partitions the fourth segment 24 and the sixth segment 26. As shown in FIG.

The six segments from the first segment 21 to the sixth segment 26 partitioned by the dividing lines L1 to L8 form irradiation patterns in mutually different irradiation regions. 4 to 9 are diagrams showing examples of irradiation patterns formed by the first segment 21 to the sixth segment 26. FIG. FIG. 4 is a diagram showing an example of the first irradiation pattern P1 formed by the first segment 21. As shown in FIG. FIG. 5 is a diagram showing an example of the second irradiation pattern P2 formed by the second segment 22. As shown in FIG. FIG. 6 is a diagram showing an example of the third irradiation pattern P3 formed by the third segment 23. As shown in FIG. FIG. 7 is a diagram showing an example of the fourth irradiation pattern P4 formed by the fourth segment 24. As shown in FIG. FIG. 8 is a diagram showing an example of the fifth irradiation pattern P5 formed by the fifth segment 25. As shown in FIG. FIG. 9 is a diagram showing an example of the sixth irradiation pattern P6 formed by the sixth segment 26. As shown in FIG. The HH line in FIGS. 4 to 9 indicates the horizontal plane, and the VV line is perpendicular to the horizontal plane and indicates the center of the vehicle.

The first segment 21 forms a first irradiation pattern P1 including an oblique cutoff line CL1, as shown in FIG. The oblique cutoff line CL1 is, for example, inclined at an angle θ with respect to the horizontal plane HH. In this embodiment, this angle θ can be set to, for example, about 15°. The oblique cutoff line CL1 is formed, for example, by a portion of the first segment 21 partitioned by the parting line L2.

The second segment 22 forms a second irradiation pattern P2, as shown in FIG. The second irradiation pattern P2 is, for example, an overhead pattern and is formed above the horizontal plane HH.

The third segment 23 forms a third irradiation pattern P3, as shown in FIG. The third irradiation pattern P3 includes a horizontal cutoff line CL2. The third irradiation pattern P3 is formed so as to spread laterally with respect to the center of the vehicle.

The fourth segment 24 forms a fourth irradiation pattern P4, as shown in FIG. The fourth irradiation pattern P4 is formed to the left of the first irradiation pattern P1. The fourth irradiation pattern P4 is a pattern that does not include a cutoff line. It should be noted that the configuration may be such that the fourth segment 24 forms the second irradiation pattern P2 and the second segment 22 forms the fourth irradiation pattern P4.

The fifth segment 25 forms a fifth irradiation pattern P5, as shown in FIG. The fifth irradiation pattern P5 is a diffusion pattern formed below the horizontal plane HH. The fifth irradiation pattern P5 is formed so as to spread in the left-right direction with respect to the center of the vehicle.

The sixth segment 26 forms a sixth irradiation pattern P6, as shown in FIG. The sixth irradiation pattern P6 is a diffusion pattern formed below the horizontal plane HH. The sixth irradiation pattern P6 is formed so as to spread in the left-right direction with respect to the center of the vehicle.

FIG. 10 is a diagram showing an example of the low beam pattern P formed in front of the vehicle by the reflector 20 described above. A low beam pattern P shown in FIG. 10 is an irradiation pattern obtained by superimposing the first irradiation pattern P1 to the sixth irradiation pattern P6. The low beam pattern P may include an irradiation pattern different from the first irradiation pattern P1 to the sixth irradiation pattern P6.

For example, when the dividing line L2 is provided perpendicular to the vertical direction, the light reflected by the dividing line L2 becomes diffused light Da diffused in the horizontal direction. The diffused light Da is outside the low beam pattern P and may be diffused toward the own lane and other lanes. Therefore, the diffused light Da may become glare light for the preceding vehicle and the oncoming vehicle.

On the other hand, in the present embodiment, the dividing line L2 is inclined with respect to the straight line M2 parallel to the vertical direction. In this configuration, the light reflected by the dividing line L2 becomes the diffused light D1 that is diffused obliquely with respect to the horizontal plane. The diffused light D1 is diffused obliquely inside the low beam pattern P in the same manner as the oblique cutoff line CL1. Therefore, it is possible to prevent the diffused light D1 from becoming glare light.

As described above, the vehicle headlamp 100 according to the present embodiment includes the light source 10 and the reflector 20 provided with the reflecting surface 20R for reflecting the light from the light source 10. The light source 10 has a light emitting surface The reflector 20 has a main body member 20B made of a resin material and a reflective film 20F forming a reflective surface 20R. has a plurality of segments 21 to 26 arranged side by side with a dividing line in between, and the light from the light source 10 is reflected by each of the plurality of segments 21 to 26, and the front irradiation area in the vehicle mounted state has different shapes , and one of the division lines L2 in the left-right direction in the first segment 21 that forms the irradiation pattern P1 including the oblique cutoff line CL1 among the plurality of segments 21-26 is in the vehicle-mounted state. It is tilted with respect to the vertical direction.

Therefore, the light D1 reflected and diffused by the parting line L2 is diffused in the diagonal direction inside the low beam pattern P in the same manner as the diagonal cutoff line CL1. Due to the above points, it is possible to prevent the diffused light D1 from protruding outside the oblique cutoff line CL1 (on the side of the own lane or the other lane), thereby suppressing the occurrence of glare.

In the vehicle headlamp 100 described above, the light-emitting surface 11 is arranged such that two parallel sides facing each other in the front-rear direction in the vehicle-mounted state are inclined with respect to the left-right direction in the vehicle-mounted state. . For this reason, the irradiation pattern of the light emitted from the light source 10 is different from the configuration in which two parallel sides of the light emitting surface 11 that face each other in the front-rear direction are parallel to the straight line M1 that is parallel in the left-right direction. , and is formed in a state inclined clockwise in front of the vehicle. Therefore, the light irradiation pattern can be tilted along the direction of the oblique cutoff line CL1.

In the vehicle headlamp 100 described above, the reflector 20 has the other horizontal dividing line L1 of the first segment 21 parallel to the vertical direction when the vehicle is mounted. The light reflected in the vicinity of the parting line L1 in the first segment 21 forms the shoulder side portion of the first irradiation pattern P1 (see FIG. 4). Therefore, when the light is diffused in the horizontal direction, the light directed to the outside of the low beam pattern P is diffused toward the road shoulder, and the light directed to the inside (own lane side) is irradiated within the low beam pattern P. As described above, the light reflected near the dividing line L1 in the first segment 21 is less likely to become glare light than the light reflected by the dividing line L2. does not need to be tilted against Therefore, by making the dividing line L1 parallel to the vertical direction, the dividing line L1 can be easily formed.

In the vehicle headlamp 100 described above, the reflector 20 includes a third segment 23 of the plurality of segments 21 to 26 that forms an irradiation pattern including a horizontal cutoff line CL2. may be tilted against According to this configuration, the diffused light D2 (see FIG. 10) reflected and diffused by the dividing line L2 of the third segment 23 is horizontally diffused inside the low beam pattern P similarly to the horizontal cutoff line CL2. be. Therefore, it is possible to prevent the diffused light D2 from protruding outside (upward) from the horizontal cutoff line CL2, thereby suppressing the generation of glare light.

In the vehicle headlamp 100 described above, the first segment 21 and the third segment 23 are arranged in the vertical direction, and the dividing line L2 of the respective segments 21 and 23 inclined with respect to the vertical direction is on one straight line. are placed in With this configuration, the area on the reflecting surface 20R of the reflector 20 can be efficiently used to suppress the generation of glare light.

In the vehicle headlamp 100 described above, the first segment 21 is arranged at the position furthest from the light source 10 in the vertical direction, and the third segment 23 is arranged at the position closest to the light source in the vertical direction. This makes it easier to form the optical image of the third irradiation pattern P3 to be formed in a wider range larger than that of the first irradiation pattern P1.

The technical scope of the present invention is not limited to the above embodiments, and modifications can be made as appropriate without departing from the scope of the present invention.

CL1... oblique cut-off line, CL2... horizontal cut-off line, D1, D2, Da... diffused light, L1 to L8... dividing line, M1, M2, M3... straight line, P... low beam pattern, P1... first irradiation pattern, P2... 2nd irradiation pattern, P3... 3rd irradiation pattern, P4... 4th irradiation pattern, P5... 5th irradiation pattern, P6... 6th irradiation pattern, 10... light source, 11... light emitting surface, 20... reflector, 20B... body member , 20F...Reflective film, 20R...Reflective surface, 21...First segment, 22...Second segment, 23...Third segment, 24...Fourth segment, 25...Fifth segment, 26...Sixth segment, 30...Installation Member, 100... vehicle headlight

Claims (5)

a light source;
a reflector provided with a reflecting surface that reflects light from the light source;
The light source has a rectangular light emitting surface,
The reflector has a reflective film forming the reflective surface disposed on a main body member formed using a resin material,
The reflecting surface has a plurality of segments arranged side by side in the left-right direction in the vehicle-mounted state via a dividing line. Forming irradiation patterns having mutually different shapes in the irradiation area, one of the dividing lines in the left-right direction of the oblique cutoff segments forming the irradiation pattern including the oblique cutoff line among the plurality of segments is aligned vertically in the vehicle mounted state. tilted in the direction of
In the reflector, one of the dividing lines in the left-right direction of the horizontal cut-off segment forming an irradiation pattern including a horizontal cut-off line among the plurality of segments is inclined with respect to the up-down direction.
Vehicle headlight. 2. The vehicle headlamp according to claim 1, wherein the light emitting surface is arranged such that two parallel sides facing each other in the front-rear direction in a vehicle-mounted state are inclined with respect to the left-right direction in the vehicle-mounted state. light. 3. The vehicle headlamp according to claim 1, wherein the reflector has the other split line in the left-right direction of the oblique cut-off segment that is parallel to the up-down direction in a vehicle-mounted state. The oblique cutoff segment and the horizontal cutoff segment are arranged in the vertical direction, and the dividing lines of the respective segments inclined with respect to the vertical direction are arranged on one line. 4. The vehicle headlamp according to any one of 3 . The oblique cutoff segment is arranged at a position farthest from the light source in the vertical direction,
The vehicle headlamp according to any one of claims 1 to 4 , wherein the horizontal cutoff segment is arranged at a position closest to the light source in the vertical direction.

Images