CN111750329A

CN111750329A - Vehicle headlamp

Info

Publication number: CN111750329A
Application number: CN202010224202.XA
Authority: CN
Inventors: 石井雄一
Original assignee: Ichikoh Industries Ltd
Current assignee: Ichikoh Industries Ltd
Priority date: 2019-03-29
Filing date: 2020-03-26
Publication date: 2020-10-09
Anticipated expiration: 2040-03-26
Also published as: EP3719390B1; CN111750329B; EP3719390A1; JP2020167024A; JP7302233B2

Abstract

The invention provides a vehicle headlamp capable of inhibiting glare. A vehicle headlamp (100) is provided with a light source (10) and a reflector (20) provided with a reflection surface (20R) for reflecting light from the light source (10), wherein the light-emitting surface (11) of the light source (10) is rectangular, the reflector (20) is provided with a reflection film for forming the reflection surface (20R) on a main body component formed by using a resin material, the reflection surface (20R) is provided with a plurality of sections (21-26) which are arranged in the left and right directions in a vehicle mounting state through dividing lines, each of the plurality of sections (21-26) reflects the light from the light source (10) and forms irradiation patterns (P1-P6) with different shapes in a front irradiation area in the vehicle mounting state, a dividing line (L2) in one of the left and right directions of a first segment (21) of the plurality of segments (21-26) forming an irradiation pattern (P1) including an inclined cut-off line (CL1) is inclined with respect to the vertical direction in a vehicle-mounted state.

Description

Vehicle headlamp

Technical Field

The present invention relates to a vehicle headlamp.

Background

A vehicle headlamp is known which includes a light source and a reflector provided with a reflecting surface having a plurality of segments arranged in a lateral direction in a vehicle mounted state via a dividing line, and forms irradiation patterns having different shapes in a front irradiation region in the vehicle mounted state by reflecting light from the light source to each of the plurality of segments.

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open publication No. 2015-149173

Disclosure of Invention

Problems to be solved by the invention

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 serving as a reflecting surface on the main body member by vapor deposition. In such a reflector, a step is formed at a dividing line between the segments, and light reflected by the step may be diffused and may be glare.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a vehicle headlamp capable of suppressing glare.

Means for solving the problems

A vehicle headlamp of the present invention includes: a light source; and a reflector provided with a reflection surface that reflects light from the light source, a light-emitting surface of the light source having a rectangular shape, the reflector being provided with a reflection film that constitutes the reflection surface on a main body member formed using a resin material, the reflection surface having a plurality of segments arranged in a lateral direction in a vehicle-mounted state via dividing lines, each of the plurality of segments reflecting light from the light source to form irradiation patterns having mutually different shapes in an irradiation region in front in the vehicle-mounted state, the dividing line of one of the lateral direction in which an oblique cut-off segment of the irradiation pattern including an oblique cut-off line is formed in the plurality of segments being inclined with respect to a vertical direction in the vehicle-mounted state.

Preferably, the light emitting surface is disposed in a state in which two parallel sides disposed to face each other in a front-rear direction in a vehicle mounted state are inclined with respect to a left-right direction in the vehicle mounted state.

In the reflector, it is preferable that the dividing line of the other of the oblique cut sections in the left-right direction is parallel to a vertical direction in a vehicle-mounted state.

In the reflector, it is preferable that the dividing line of one of the plurality of segments in the left-right direction forming a horizontal cut-off segment of the irradiation pattern including a horizontal cut-off line is inclined with respect to the vertical direction.

Preferably, the inclined cutoff section and the horizontal cutoff section are arranged along the vertical direction, and the dividing lines of the respective sections inclined with respect to the vertical direction are arranged on a single line.

Preferably, the inclined cut-off section is disposed at a position farthest from the light source in the vertical direction, and the horizontal cut-off section is disposed at a position closest to the light source in the vertical direction.

ADVANTAGEOUS EFFECTS OF INVENTION

According to the present invention, a vehicle headlamp capable of suppressing glare can be provided.

Drawings

Fig. 1 is a front view showing an example of a vehicle headlamp of the present embodiment.

Fig. 2 is a cross-sectional view showing an example of the vehicle headlamp of the present embodiment.

Fig. 3 is a plan view showing an example of the vehicle headlamp of the present embodiment.

Fig. 4 is a diagram showing an example of the first irradiation pattern formed by the first segment.

Fig. 5 is a diagram showing an example of the 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 a reflector.

In the figure:

CL 1-oblique cut-off line, CL 2-horizontal cut-off line, Dl, D2, Da-diffuse light, L1-L8-split line, M1, M2, M3-straight line, P-low beam pattern, P1-first irradiation pattern, P2-second irradiation pattern, P3-third irradiation pattern, P4-fourth irradiation pattern, P5-fifth irradiation pattern, P6-sixth irradiation pattern, 10-light source, 11-light emitting surface, 20-reflector, 20B-main body member, 20F-reflective film, 20R-reflective surface, 21-first section, 22-second section, 23-third section, 24-fourth section, 25-fifth section, 26-sixth section, 30-mounting member, 100-vehicle headlamp.

Detailed Description

Hereinafter, embodiments of a vehicle headlamp according to the present invention will be described with reference to the drawings. The present invention is not limited to the embodiment. The components in the following embodiments include components that can be easily replaced by those skilled in the art, or substantially the same components. In the following description, the front-rear (front and rear), up-down (upper and lower), and left-right (left and right) directions are directions in a state where the vehicle headlamp is mounted on the vehicle, and indicate directions when the front side is viewed in a state where the vehicle headlamp is seated on the driver's seat. In the present embodiment, the vertical direction is parallel to the vertical direction, and the horizontal direction is the horizontal direction.

Fig. 1 to 3 are diagrams showing an example of a vehicle headlamp 100 according to the present embodiment. Fig. 1 is a front view, fig. 2 is a cross-sectional view of the section including the light source 10 in fig. 1, and fig. 3 is a plan view. As shown in fig. 1 to 3, the vehicle headlamp 100 has a light source 10 and a reflector 20. In the present embodiment, the vehicle headlamp 100 is a reflector-type lamp that forms a low beam irradiation pattern toward the front of the vehicle, and is used as a vehicle headlamp. The vehicle headlamp 100 is mounted on, for example, the left and right front portions of the vehicle. The vehicle headlamp 100 may have the same structure on the left and right sides, for example, instead of the symmetrical structure on the left and right sides.

In the present embodiment, the light source 10 is a semiconductor-type light source such as an LED, an OEL, or an OLED (organic EL). 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 mounted on a vehicle, the light emitting surface faces downward, for example, and is 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 emitting surface 11 of the light source 10 is rectangular. The light-emitting surface 11 of the light source 10 includes two parallel sides that are arranged to face each other in the front-rear direction and are arranged in a state of being inclined with respect to a straight line Ml (see fig. 3) that is parallel in the left-right direction. The inclination angle θ 1 in this case can be set to 10 ° or more and 20 ° or less, for example.

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

A reflecting surface 20R is formed on the inner surface of the reflector 20. The reflecting surface 20R is divided into a plurality of sections. In the present embodiment, the reflecting surface 20R has at least six segments. The 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.

The six segments 21 to 26 are divided by division lines L1 to L4 parallel to each other in the vertical direction and division lines L5 to L8 parallel to each other in the horizontal direction in a front view. The three sections, i.e., the first section 21, the second section 22, and the third section 23, are arranged in the vertical direction. The fourth section 24 and the sixth section 26 are arranged in the vertical direction. The three sections 21 to 23, the two

sections

24 and 26, and the fifth section 25 are arranged in the left-right direction.

A dividing line L1 separates the three sections 21-23 from the two

sections

24, 26. The dividing line L1 is parallel to the vertical direction. The dividing line L1 is formed across the three sections 21-23. That is, the left dividing lines in the left-right direction of the first section 21, the second section 22, and the third section 23 are arranged on a single line. In addition, the dividing line L1 is formed across the two

sections

24, 26. That is, the right dividing lines in the left-right direction in the fourth segment 24 and the sixth segment 26 are arranged on a single line.

A dividing line L2 separates the three sections 21-23 from the fifth section 25. The dividing line L2 is inclined with respect to a straight line M2 parallel to the vertical direction. The inclination angle θ 2 of the dividing line L2 with respect to the straight line M2 can be set to about half the angle of the inclination cut-off line of the low beam pattern formed in the front of the vehicle. In the present embodiment, the angle of the inclination cut-off line is about 15 °. Therefore, the inclination angle θ 2 can be set to, for example, 6 ° or more and 8 ° or less. The range of the angle of inclination θ 2 is not limited to the above angle.

The dividing line L2 is formed across the three sections 21-23. That is, the right dividing lines in the left-right direction of the first section 21, the second section 22, and the third section 23 are arranged on a single line.

The dividing line L3 is disposed at the right end of the fifth section 25. That is, the fifth section 25 is divided by a dividing line L2 and a dividing line L3. The dividing line L3 is inclined with respect to a straight line M3 parallel to the vertical direction. The inclination angle θ 3 of the dividing line L3 with respect to the straight line M3 can be set to about half the angle of the horizontal cut-off line of the low beam pattern formed in the front of the vehicle. As in the above, the inclination angle θ 3 can be set to, for example, 6 ° or more and 8 ° or less. The angle range of the inclination angle θ 3 is not limited to the above angle. The inclination angle θ 2 and the inclination angle θ 3 may be different values.

The dividing line L4 is disposed at the left end of the two

segments

24, 26. That is, the two

segments

24, 26 are divided in the left-right direction by the dividing line L1 and the dividing line L4.

The dividing line L5 divides the first section 21 and the second section 22. The dividing line L6 divides the second section 22 and the third section 23. The dividing line L7 is disposed at the lower end of the fourth section 24. Dividing line L8 divides fourth section 24 and sixth section 26.

The six sectors, the first sector 21 to the sixth sector 26, which are defined by the above-described dividing lines L1 to L8, form irradiation patterns in irradiation regions different from each other. Fig. 4 to 9 are diagrams showing examples of irradiation patterns formed by the first to sixth segments 21 to 26. Fig. 4 is a diagram illustrating an example of the first irradiation pattern P1 formed by the first segment 21. Fig. 5 is a diagram showing an example of the second irradiation pattern P2 formed by the second segment 22. Fig. 6 is a diagram showing an example of the third irradiation pattern P3 formed by the third segment 23. Fig. 7 is a diagram showing an example of the fourth irradiation pattern P4 formed by the fourth segment 24. Fig. 8 is a diagram showing an example of the fifth irradiation pattern P5 formed by the fifth segment 25. Fig. 9 is a diagram showing an example of the sixth irradiation pattern P6 formed by the sixth segment 26. The line H-H in fig. 4 to 9 indicates the horizontal plane, and the line V-V is perpendicular to the horizontal plane and is a line indicating the center of the vehicle.

As shown in fig. 4, the first section 21 forms a first irradiation pattern P1 including an inclined cut-off line CL 1. The inclination cutoff line CL1 is, for example, inclined at an angle θ with respect to the horizontal plane H-H. In the present embodiment, the angle θ can be set to, for example, about 15 °. The oblique cut-off line CL1 is formed by, for example, a portion of the first section 21 divided by the dividing line L2.

As shown in fig. 5, the second section 22 forms a second shot pattern P2. The second irradiation pattern P2 is, for example, an overhead pattern, and is formed above the horizontal plane H-H.

As shown in fig. 6, the third section 23 forms a third irradiation pattern P3. The third irradiation pattern P3 includes a horizontal cut-off line CL 2. The third irradiation pattern P3 is formed to spread to the left and right with respect to the center of the vehicle.

As shown in fig. 7, fourth section 24 forms a fourth illumination pattern P4. The fourth irradiation pattern P4 is formed on the left with respect to the first irradiation pattern P1. The fourth irradiation pattern P4 is a pattern that does not include a cut-off line. The fourth sector 24 may have the second irradiation pattern P2, and the second sector 22 may have the fourth irradiation pattern P4.

As shown in fig. 8, fifth section 25 forms a fifth illumination pattern P5. The fifth irradiation pattern P5 is a diffusion pattern formed below the horizontal plane H-H. The fifth irradiation pattern P5 is formed to spread in the left-right direction with respect to the center of the vehicle.

As shown in fig. 9, the sixth section 26 forms a sixth irradiation pattern P6. The sixth irradiation pattern P6 is a diffusion pattern formed below the horizontal plane H-H. The sixth irradiation pattern P6 is formed to spread in the left-right direction with respect to the center of the vehicle.

Fig. 10 is a view showing an example of the low beam pattern P formed in the front of the vehicle by the reflector 20. The low beam pattern P shown in fig. 10 is an irradiation pattern in which the first irradiation pattern P1 to the sixth irradiation pattern P6 described above are superimposed. The low beam pattern P may include irradiation patterns different from the first to sixth irradiation patterns P1 to P6.

For example, when the division line L2 is perpendicular to the vertical direction, the light reflected by the division line L2 becomes diffused light Da that is diffused in the horizontal direction. The diffused light Da may be diffused to the outside of the low beam pattern P, that is, the own-vehicle lane and the other-vehicle lane. Therefore, the diffused light Da may be glare to the front 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 diffused light Dl which is diffused in a direction inclined with respect to the horizontal plane. Inside the low beam pattern P, the diffused light Dl is diffused in the oblique direction like the oblique cut-off line CL 1. Therefore, the diffused light Dl can be suppressed from being glare.

As described above, the vehicle headlamp 100 of the present embodiment includes the light source 10 and the reflector 20 provided with the reflection surface 20R for reflecting the light from the light source 10, the light emitting surface 11 of the light source 10 is rectangular, the reflector 20 is provided with the reflection film 20F constituting the reflection surface 20R on the main body member 20B formed of a resin material, the reflection surface 20R has the plurality of segments 21 to 26 arranged in the left-right direction in the vehicle mounted state through the dividing line, each of the plurality of segments 21 to 26 reflects the light from the light source 10 to form the irradiation patterns P1 to P6 having different shapes in the irradiation region in front in the vehicle mounted state, a dividing line L2 in one of the left and right directions of a first block 21 of an irradiation pattern P1 including an inclined cut-off line CL1 formed in a plurality of blocks 21-26 is inclined with respect to the vertical direction in a vehicle-mounted state.

Therefore, the light Dl reflected and diffused by the dividing line L2 is diffused in the oblique direction in the low beam pattern P, similarly to the oblique cutoff line CL 1. As described above, the diffused light Dl can be prevented from being exposed to the outside (the self-lane or the other-person-lane side) of the oblique cutoff line CL1, and thus the occurrence of glare can be prevented.

In the vehicle headlamp 100 described above, the light-emitting surface 11 is disposed in a state in which two parallel sides disposed to face 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. Therefore, parallel two sides of the light emitting surface 11 that are disposed facing each other in the front-rear direction are parallel to a straight line M1 parallel to the left-right direction, and in this configuration, the irradiation pattern of the light emitted from the light source 10 is formed in a state of being inclined clockwise in the vehicle front direction. Therefore, the irradiation pattern of light can be inclined in a state along the direction of the inclined cut-off line CL 1.

In the vehicle headlamp 100 described above, the other dividing line L1 in the left-right direction of the first segment 21 in the reflector 20 is parallel to the vertical direction in the vehicle mounted state. The light reflected by the vicinity of the dividing line L1 in the first segment 21 forms a shoulder-side portion of the first irradiation pattern P1 (see fig. 4). Therefore, when the light is diffused in the left-right direction, the light directed outward in the low beam pattern P is diffused toward the road shoulder side, and the light directed inward (from the own vehicle side) is irradiated into the low beam pattern P. In this way, since the light reflected by the vicinity of the dividing line L1 in the first segment 21 is less likely to be glare than the light reflected by the dividing line L2, it is not necessary to be inclined with respect to the straight line M1 parallel to the vertical direction. 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, in the reflector 20, the dividing line L2 in one of the left-right directions of the third segment 23, which forms the irradiation pattern including the horizontal cut-off line CL2 among the plurality of segments 21 to 26, may be inclined with respect to the vertical direction. With this structure, the diffused light D2 (see fig. 10) diffused by being reflected by the dividing line L2 of the third section 23 is diffused in the horizontal direction in the low beam pattern P, similarly to the horizontal cutoff line CL 2. Therefore, the diffused light D2 can be prevented from being exposed to the outside (upward) from the horizontal cutoff line CL2, and the occurrence of glare can be prevented.

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 lines L2 of the

segments

21 and 23 inclined with respect to the vertical direction are arranged on a straight line. With this configuration, the region on the reflecting surface 20R of the reflector 20 can be effectively utilized to suppress the occurrence of glare.

In the vehicle headlamp 100, the first segment 21 is disposed at a position farthest from the light source 10 in the vertical direction, and the third segment 23 is disposed at a position closest to the light source in the vertical direction. Thereby, it is easy to form the light image formed in the third irradiation pattern P3 in a wider range to be larger than the first irradiation pattern P1.

The technical scope of the present invention is not limited to the above-described embodiments, and can be appropriately modified within a scope not departing from the gist of the present invention.

Claims

1. A vehicle headlamp is characterized by comprising:

a light source; and

a reflector having a reflecting surface for reflecting light from the light source,

the light emitting surface of the light source is rectangular,

the reflector is provided with a reflecting film constituting the reflecting surface on a main body member formed of a resin material,

the reflection surface has a plurality of segments arranged in a lateral direction in a vehicle-mounted state via a dividing line, each of the plurality of segments reflects light from the light source to form irradiation patterns having different shapes in a front irradiation region in the vehicle-mounted state, and the dividing line in one of the lateral direction in which the oblique cutoff segment including the irradiation pattern of the oblique cutoff line is formed among the plurality of segments is inclined with respect to a vertical direction in the vehicle-mounted state.

2. The vehicular headlamp according to claim 1,

the light-emitting surface is disposed in a state in which two parallel sides disposed to face 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.

3. The vehicular headlamp according to claim 1 or 2,

in the reflector, the dividing line of the other of the oblique cut-off sections in the left-right direction is parallel to the vertical direction in a vehicle-mounted state.

4. The vehicular headlamp according to any one of claims 1 to 3, wherein,

in the reflector, the dividing line in one of the left-right directions of the horizontal cut-off section in which the irradiation pattern including the horizontal cut-off line is formed among the plurality of sections is inclined with respect to the vertical direction.

5. The vehicular headlamp according to claim 4,

the inclined cut-off section and the horizontal cut-off section are arranged in the vertical direction, and the dividing lines of the sections inclined with respect to the vertical direction are arranged on a single line.

6. The vehicular headlamp according to claim 4 or 5,

the inclined cut-off section is disposed at a position farthest from the light source in the vertical direction,

the horizontal cut-off section is disposed at a position closest to the light source in the up-down direction.