JP2014229509A - Vehicle lighting appliance system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle lighting appliance system which can improve the distant visibility of a vehicle front while preventing dazzling light to a preceding vehicle and an oncoming vehicle.SOLUTION: A vehicle lighting appliance system 12 comprises: a first optical system 34R which is arranged at a vehicle lighting appliance 22R at an opposite lane side out of vehicle lighting appliances 22L, 22R which are arranged at left and right fronts of a vehicle, respectively, and forms a low-beam light distribution pattern P1R having a first cutoff line CL3 at an upper end of the opposite lane side on a vertical virtual screen in front of the vehicle by at least 15 m; and a second optical system 38L which is arranged at the vehicle lighting appliance 22L at an own vehicle lane side, overlapped on a part of the first cutoff line CL3 on the vertical virtual screen, and forms a first additional light distribution pattern P2 including a region in an upper part rather than the first cutoff line CL3.

Description

  The present invention relates to a vehicular lamp system.

  2. Description of the Related Art Conventionally, a vehicular lamp including a light source, a projection lens, a reflector, and a shade, a first reflecting surface that reflects light from the light source downward toward the front of the shade at the front end of the reflector, and the front of the shade In addition, there is disclosed a vehicle lamp provided with a second reflecting surface that is provided at a rear focal point of the projection lens and reflects reflected light from the first reflecting surface toward the projection lens (see Patent Document 1). .

JP 2010-108728 A

In the vehicular lamp described in Patent Document 1, since the light incident on the projection lens from the second reflecting surface is emitted as upward irradiation light, the light is also irradiated above the cut-off line of the light distribution pattern. Visibility can be improved.
However, in such a vehicular lamp, light is emitted from the lamp toward the front of the vehicle in order to irradiate light also above the cut-off line. In some cases, it became light.

  Therefore, an object of the present invention is to provide a vehicular lamp system that can improve distant visibility in front of the vehicle while preventing dazzling light on the preceding vehicle and oncoming vehicle.

(1) In order to achieve the above object, the vehicular lamp system of the present invention includes:
In a vehicular lamp system provided with vehicular lamps respectively arranged on the left and right front parts of the vehicle,
A first optical system which is provided in a vehicle lamp on the opposite lane side and forms a first low beam light distribution pattern having a first cut-off line on an upper end portion on the opposite lane side on a vertical virtual screen at least 15 m ahead of the vehicle When,
A first light distribution pattern provided on a vehicle lamp on the own lane side and forming a first additional light distribution pattern that overlaps a part of the first cutoff line and includes a region above the first cutoff line on the vertical virtual screen. Two optical systems;
It is characterized by having.

  (2) According to the present invention, the first additional light distribution pattern is formed by light that forms an angle of 3 ° or more on the opposite lane side in the lateral direction of the vehicle with respect to the front direction of the vehicle lamp on the own lane side. Preferably it is formed.

  (3) According to the present invention, a second low beam light distribution pattern is provided on the vehicle lamp on the own lane side, and has a second cut-off line at the upper end portion on the opposite lane side on the vertical virtual screen. It is preferable to further include a third optical system.

  (4) According to the present invention, the first additional light distribution pattern provided on the vehicle lamp in the opposite lane and formed by the second optical system on the vertical virtual screen is a vehicle center axis. It is preferable to further include a fourth optical system that forms the second additional light distribution pattern at a symmetrical position.

(5) According to the present invention, the second optical system reflects a light source and a light emitted from the light source in a vehicle lamp on the opposite lane side on which the first optical system is mounted. With a reflective surface,
It is preferable that the first additional light distribution pattern is formed by a reflective surface on a side of the vehicle among the plurality of reflective surfaces.

  According to the vehicular lamp system according to the present invention, it is possible to improve distant visibility in front of the vehicle while preventing dazzling light on the preceding vehicle and the oncoming vehicle.

1 is a schematic diagram illustrating an overall configuration of a vehicle on which a vehicle lamp system according to an embodiment of the present invention is mounted. It is a front view which shows an example of the vehicle lamp which comprises the vehicle lamp system of FIG. It is AA sectional drawing of the vehicle lamp of FIG.2 (b). It is a cross-sectional view of the parabolic optical unit shown in FIG. It is a figure which shows typically the light distribution pattern of the vehicle lamp system which concerns on embodiment of this invention. It is the schematic diagram of the state which looked at the light distribution pattern of the vehicle lamp system which concerns on embodiment of this invention from upper direction. It is sectional drawing which shows the modification of the vehicle lamp which comprises the vehicle lamp system which concerns on embodiment of this invention. It is the schematic diagram of the state which looked at the light distribution pattern which concerns on another modification of the vehicle lamp system which concerns on embodiment of this invention from upper direction.

  Exemplary embodiments of the present invention will be described in detail below with reference to the accompanying drawings. In each drawing used in the following description, the scale is appropriately changed to make each member a recognizable size. Further, “right” and “left” used in the following description indicate the left and right directions viewed from the driver's seat.

  FIG. 1 schematically shows the overall configuration of a vehicle equipped with a vehicle lamp system according to an embodiment of the present invention. The vehicle 1 includes an integrated control unit 10 and a vehicle lamp system 12.

  The integrated control unit 10 includes a CPU that executes various arithmetic processes, a ROM that stores various control programs, a RAM that is used as a work area for data storage and program execution, and executes various controls in the vehicle 1. .

  The vehicle lamp system 12 includes a headlamp control unit 20, a right headlamp 22R (an example of a vehicle lamp on the opposite lane side), and a left headlamp 22L (an example of a vehicle lamp on the own lane side). Yes. The headlamp control unit 20 includes a CPU, a ROM, a RAM, and the like, and controls light irradiation by the right headlamp 22R and the left headlamp 22L.

FIG. 2 shows headlamps 22 </ b> L and 22 </ b> R respectively disposed on the left and right front portions of the vehicle 1. FIG. 2A is a front view of the right headlamp 22R, and FIG. 2B is a front view of the left headlamp 22L. FIG. 3 shows a side sectional view of the left headlamp 22L taken along the line AA in FIG. 2 (b).
As shown in FIG. 2A, the right headlamp 22R includes a translucent cover 30R, a lamp body 32R, a low beam lamp unit 34R (an example of a first optical system), a high beam lamp unit 36R, and parabolic optics. And a unit 38R. Since the specific configuration of the right headlamp 22R is the same as that of the left headlamp 22L, detailed description thereof is omitted.
Further, as shown in FIG. 2B, the left headlamp 22L is disposed symmetrically with the right headlamp 22R, and includes a translucent cover 30L, a lamp body 32L, a low beam lamp unit 34L, A high beam lamp unit 36L and a parabolic optical unit 38L (an example of a second optical system) are provided.

  As shown in FIG. 3, the translucent cover 30L of the left headlamp 22L is formed of translucent resin or the like, and is mounted on the lamp body 32L to define the lamp chamber S. The low beam lamp unit 34L, the high beam lamp unit 36L, and the parabolic optical unit 38L are disposed in the lamp chamber S. The high beam lamp unit 36L is disposed on the vehicle inner side (left side in FIG. 2B) than the two low beam lamp units 34L arranged in parallel, and the parabolic optical unit 38L is disposed below the low beam lamp unit 34L.

  The low beam lamp unit 34L is, for example, a project type lamp unit and forms a low beam light distribution pattern. The low beam lamp unit 34L includes a light source 40, a reflector 42, a projection lens 44, and a shade 46.

  The light source 40 is composed of, for example, an LED (Light Emitting Diode) and is disposed on an upper portion of a base surface 41 attached to a holder (not shown). The reflector 42 is disposed so as to cover the upper part of the light source 40 and reflects the light emitted from the light source 40 to the front of the lamp. The projection lens 44 is provided on the front side of the lamp of the light source 40 and is supported on the front end side of the lens holder 43. The projection lens 44 is a plano-convex aspherical lens having a convex front surface and a flat rear surface, and is arranged so that the lens optical axis substantially coincides with the lamp optical axis Ax extending in the vehicle front-rear direction. The shade 46 extends from the rear end side of the lens holder 43 to the light source 40 side, and is arranged so that the upper end edge passes through the rear focal point F of the projection lens 44. A part of the light emitted from the light source 40 and reflected by the reflector 42 is shielded by the shade 46, thereby forming a cut-off line of a low beam light distribution pattern described later.

  The high beam lamp unit 36L is, for example, a projector type lamp unit using LEDs as a light source, and forms a high beam light distribution pattern together with the low beam lamp unit 34L. Since the specific configuration of the high beam lamp unit 36L is substantially the same as that of the low beam lamp unit 34L, detailed description thereof is omitted.

The parabolic optical unit 38L forms, for example, a low beam distribution pattern together with the low beam lamp unit 34L. The parabolic optical unit 38L includes a light source 50, a reflector 52, and a shade 54.
The light source 50 is composed of, for example, an LED, and is disposed on an upper portion of the base surface 51 attached to a holder (not shown). The reflector 52 is disposed so as to cover the upper part of the light source 50, and reflects the light emitted from the light source 50 to the front of the lamp. The shade 54 is provided on the front side of the lamp of the light source 50.

  A surface of the reflector 52 on the front side of the lamp is configured as an effective reflection surface 53 (an example of a plurality of reflection surfaces). The effective reflecting surface 53 is configured to have a horizontally long shape extending in the left-right direction of the vehicle when the lamp is viewed from the front. As shown in FIG. 2B, the effective reflection surface 53 includes a side irradiation region 53AL and an additional light distribution region 53BL.

  As shown in FIG. 4, the side irradiation region 53AL of the effective reflection surface 53 is a region through which the optical axis Ax of the light source 50 passes, and from the vicinity of the center of the effective reflection surface 53 to the vehicle inner side (left side in FIG. 4). Occupies an area of The light L1 reflected by the side irradiation region 53AL is diffused in the left-right direction of the vehicle and constitutes a part of the low beam light distribution pattern.

  The additional light distribution region 53BL extends to the vehicle outer side (right side in FIG. 4) so as to be continuous with the side irradiation region 53AL. Since this additional light distribution region 53BL is curved toward the front side of the lamp, the light L2 reflected by the additional light distribution region 53BL is in the left direction in FIG. 4 (the direction toward the right headlamp 22R in the vehicle left-right direction). ). The light L2 reflected by the additional light distribution region 53BL is irradiated by the low beam lamp units 34L and 34R so that the shape of the low beam distribution pattern formed by the low beam lamp units 34L and 34R is not greatly affected. The light is preferably weaker than light.

  FIG. 5 is a diagram illustrating an example of a light distribution pattern of light emitted from the low beam lamp units 34L and 34R and the parabolic optical units 38L and 38R of the left headlamp 22L and the right headlamp 22R. FIG. 5 shows a light distribution pattern formed on a virtual vertical screen arranged at a position 15 m ahead of the vehicle, for example.

  The low beam light distribution pattern P1 (an example of a first low beam light distribution pattern) is formed by combining light emitted from the low beam lamp units 34L and 34R of the left headlamp 22L and the right headlamp 22R. The low beam distribution pattern P1 is a left beam distribution pattern, and has a cut-off line CL1 to a cut-off line CL3 at its upper end. The cut-off line CL1 to the cut-off line CL3 extend in the horizontal direction at the left and right steps with a VV line as a boundary passing through the vanishing point in the front direction of the lamp.

  The cut-off line CL1 extends above the H-H line orthogonal to the V-V line, and is used as the own lane side cut-off line. The cut-off line CL2 extends obliquely from the right end portion of the cut-off line CL1 toward the lower right. The cut-off line CL3 extends below the H-H line on the right side from the intersection of the cut-off line CL2 and the V-V line. That is, the cut-off line CL3 is used as a cut-off line on the opposite lane side. The intersection of the cut-off line CL2 and the cut-off line CL3 is an elbow point E.

  The additional light distribution pattern P2 (an example of the first additional light distribution pattern) shown in FIG. 5 is reflected by the additional light distribution region 53BL of the reflector 52 out of the light emitted from the parabolic optical unit 38L of the left headlamp 22L. Formed by the light L2. This additional light distribution pattern P2 overlaps a part of the cut-off line CL3 on the opposite lane side including the elbow point E in the low beam light distribution pattern P1 formed by the low beam lamp units 34L and 34R on the vertical virtual screen, and The region above the cut-off line CL3 is included.

  FIG. 6 is a view of a light distribution pattern formed by the low beam lamp units 34L and 34R and the parabolic optical units 38L and 38R as viewed from above. FIG. 6 shows an example of a light distribution pattern in which the vehicle 1 moves to the road surface in front of the vehicle in a state where the vehicle 1 approaches an inclined surface (for example, a gradient of about 20 °).

  The low beam light distribution pattern P1L is a light distribution pattern that shows reflection on the road surface of light emitted from the low beam lamp unit 34L of the left headlamp 22L. The low beam light distribution pattern P1R is a light distribution pattern showing reflection of light irradiated from the low beam lamp unit 34R of the right headlamp 22R on the road surface. By combining the low beam light distribution pattern P1L and the low beam light distribution pattern P1R, the low beam light distribution pattern P1 is formed on the virtual vertical screen shown in FIG. Usually, the light emitted from the low beam lamp units 34L and 34R is emitted so as to be reflected on the road surface in the vicinity of 70 m ahead of the vehicle 1. However, as shown in FIG. 6, in the state where the vehicle 1 is approaching the inclined surface, specifically, the state where the vehicle 1 is approaching the uphill or the state where the vehicle 1 is approaching the flat surface from the downhill, the vehicle 1 The low beam light distribution patterns P1L and P1R are reflected on the road surface from 15 m to 15 m ahead.

  At this time, the additional light distribution pattern P2 is a cut-off line on the opposite lane side of the low-beam light distribution pattern P1R of the right headlamp 22R on the vertical virtual screen at least 15 m ahead of the vehicle 1 (that is, the cut-off line in FIG. 5). It is irradiated so as to be added to CL3). The light L2 forming the additional light distribution pattern P2 forms an angle α on the opposite lane side (right headlamp 22R side) in the vehicle left-right direction with respect to the front direction d of the left headlamp 22L. When the distance between the left and right headlamps 22L and 22R is, for example, about 1.4 m as in an ordinary car, the angle α is set to be 5 ° or more, but the left and right headlamps 22L and 22R In the case of a light vehicle whose interval is shorter than that of a normal vehicle, the angle α may be 3 ° or more.

  Although not shown, in the present embodiment, the light reflected by the additional light distribution region 53BR of the parabolic optical unit 38R of the right headlamp 22R is reflected by the additional light distribution region 53BL of the left parabolic optical unit 38L. The additional light distribution pattern P <b> 2 formed by the reflected light L <b> 2 is irradiated to a position symmetrical with respect to the vehicle center axis C. Since this light is irradiated inside the low beam light distribution pattern P1, the shape of the low beam light distribution pattern P1 is not affected.

  As shown in FIG. 6, in a situation where the vehicle 1 is approaching an inclined surface, the cut-off line of the low beam light distribution pattern P1 is reflected on the road surface on the nearer side than usual (for example, near 15 m ahead of the vehicle 1). Therefore, there is a problem in that the difference in brightness between the upper and lower sides of the cut-off line becomes strong, the visibility of the dark part is lowered, and the distance visibility in front of the vehicle is deteriorated. In order to solve such problems, it is conceivable to irradiate light above the cutoff line on the opposite lane side, but as before, light is emitted from the left and right headlamps toward the front of the vehicle and above the cutoff line. In some cases, this light may become illusion light for the preceding vehicle or oncoming vehicle.

  On the other hand, according to the vehicle lamp system 12 of the present embodiment, the right headlamp on the vertical virtual screen at least 15 m ahead of the vehicle 1 by the light L2 emitted from the parabolic optical unit 38L of the left headlamp 22L. Region of the low beam distribution pattern P1 formed by the 22R low beam lamp unit 34R that overlaps with a part of the cutoff line CL3 (an example of the first cutoff line) on the opposite lane side and is above the cutoff line CL3 on the opposite lane side The additional light distribution pattern P2 including is formed. Therefore, the upper part of the cut-off line CL3 on the opposite lane side is blurred by the additional light distribution pattern P2, and the difference in brightness between the upper and lower sides of the cut-off line CL3 is alleviated. Can be improved. Further, at this time, the light L2 that is reflected by the parabolic optical unit 38L of the left headlamp 22L and forms the additional light distribution pattern P2 is tilted toward the opposite lane with respect to the front direction d of the left headlamp 22L. Is irradiated. For this reason, it is possible to prevent the dazzling light on the preceding vehicle and the oncoming vehicle while maintaining the far visibility in front of the vehicle.

  The additional light distribution pattern P2 is formed by the light L2 that forms an angle of 3 ° or more on the opposite lane side in the vehicle left-right direction with respect to the front direction d of the left headlamp 22L. Therefore, even if the vehicle lamp system 12 is mounted on any vehicle, the dazzling light given to the oncoming vehicle can be reliably prevented.

  Further, according to the present embodiment, the low-beam light distribution pattern P1L (an example of the second low-beam light distribution pattern) provided on the left headlamp 22L and having the cutoff line CL3 (an example of the second cutoff line) on the vertical virtual screen. ) To form a low beam lamp unit 34L (an example of a third optical system). Therefore, the low beam distribution pattern P1L formed by the left headlamp 22L can be superimposed and irradiated on the low beam distribution pattern P1R formed by the right headlamp 22R. Thus, a desired low beam light distribution pattern P1 can be formed by both the left and right headlamps 22L and 22R.

  Further, according to the present embodiment, the parabolic optical units 38L and 38R include the light source 50 and the effective reflection surface 53 of the reflector 52 as a plurality of reflection surfaces that reflect the light emitted from the light source 50, and the effective reflection surface. An additional light distribution pattern P <b> 2 is formed by an additional light distribution region 53 </ b> BL that is a reflective surface on the side of the vehicle 1. Thereby, the light L2 forming the additional light distribution pattern P2 can be easily irradiated in a direction inclined toward the opposite lane with respect to the front direction of the lamp, and is given to the preceding vehicle and the oncoming vehicle by the additional light distribution pattern P2. Dazzling light can be prevented more reliably.

  In the above, the example of embodiment of this invention was demonstrated, However, This invention is not limited to the said embodiment, It is possible to employ | adopt another structure as needed.

  In the above-described embodiment, the projector-type lamp including the reflector 42 and the projection lens 44 is described as an example of the low-beam lamp units 34L and 34R. However, the present invention is not limited to this example. For example, as shown in FIG. 7, a parabolic lamp that includes a light source 40A, a reflector 42A, and an extension 46A and does not require a projection lens may be adopted as the low beam lamp unit 34A. Also in such a vehicular lamp 22A, the additional light distribution pattern that includes a region above the cut-off line on the opposite lane side that overlaps a part of the cut-off line on the opposite lane side in the low beam light distribution pattern by the parabolic optical unit 38. By forming the, it is possible to improve the far visibility in front of the vehicle while preventing the dazzling light to the preceding vehicle and the oncoming vehicle.

  Moreover, in said embodiment, although the vehicle lamp system 12 which forms the low beam light distribution pattern P1 for right-hand drive cars was demonstrated, it is not restricted to this example. For example, as shown in FIG. 8, the shape of the shade 46 of the low beam lamp units 34L and 34R is changed, and the low beam light distribution pattern P1 of the above embodiment is inverted around the VV line on the vertical virtual screen. Thus, a low beam light distribution pattern P3 (P3L, P3R) for a left-hand drive vehicle may be formed. At this time, since the left headlamp 22L side in the left-right direction of the vehicle is the opposite lane side, from the parabolic optical unit 38R (an example of the fourth optical system) of the right headlamp 22R, the opposite lane side of the low beam light distribution pattern P3 is obtained. Light L4 is irradiated toward the cut-off line. Thereby, on the vertical virtual screen at least 15 m ahead of the vehicle 1, it overlaps with a part of the cut-off line CL3 on the opposite lane side of the low beam light distribution pattern P3L formed by the left headlight 22L, and the cut on the opposite lane side An additional light distribution pattern P4 (an example of a second additional light distribution pattern) in a region including a region above the offline CL3 is formed. That is, the additional light distribution pattern P4 is formed at a position symmetrical to the vehicle center axis C with respect to the additional light distribution pattern P2 formed by the parabolic optical unit 38L of the left headlamp 22L shown in FIG. As described above, even if the low beam distribution pattern formed by the low beam lamp units 34L and 34R is reversed between the right-hand drive vehicle and the left-hand drive vehicle, it is mounted on either the left or right headlamps 22L or 22R. The additional parallax optical units 38L and 38R form the additional light distribution patterns P2 and P4 in a region that overlaps a part of the opposite lane side cut-off line CL3 and includes a region above the opposite lane side cut-off line CL3. it can. Therefore, the versatility of the vehicular lamp system 12 can be enhanced while preventing the dazzling light given to the preceding vehicle and the oncoming vehicle.

  In the above embodiment, the light source 50 of the parabolic optical units 38L and 38R is disposed upward and the reflector 52 is provided so as to cover the upper part of the light source 50. However, the present invention is not limited to this example. For example, it is good also as a structure which arrange | positions the light source of a parabolic optical unit downward, and arrange | positions a reflector so that the lower part of a light source may be covered.

  DESCRIPTION OF SYMBOLS 1: Vehicle, 10: Integrated control part, 12: Vehicle lamp system, 20: Headlight control part, 22R: Right side headlight (an example of vehicle lamp on the opposite lane side), 22L: Left side headlight ( Example of vehicle lamp on own lane side), 30L, 30R: translucent cover, 32L, 32R: lamp body, 34L, 34R: low beam lamp unit (example of first optical system, third optical system), 36L, 36R : High beam lamp unit (example of first optical system and third optical system), 38L, 38R: Parabolic optical unit (example of second optical system and fourth optical system), 40: light source, 42: reflector, 44: projection Lens: 46: Shade, 50: Light source, 52: Reflector, 53: Effective reflection surface (an example of a plurality of reflection surfaces), 53AL: Side illumination region, 53BL: Additional light distribution region, 54: Shade, L1 to L4: Light, P1 Low beam light distribution pattern (an example of a first low beam light distribution pattern), P2: Additional light distribution pattern (an example of a first additional light distribution pattern), P3: Low beam light distribution pattern (an example of a second low beam light distribution pattern), P4 : Additional light distribution pattern (example of second additional light distribution pattern), CL1: cut-off line, CL2: cut-off line, CL3: cut-off line (example of first cut-off line, second cut-off line)

Claims (5)

In a vehicular lamp system provided with vehicular lamps respectively arranged on the left and right front parts of the vehicle,
A first optical system which is provided in a vehicle lamp on the opposite lane side and forms a first low beam light distribution pattern having a first cut-off line on an upper end portion on the opposite lane side on a vertical virtual screen at least 15 m ahead of the vehicle When,
A first light distribution pattern provided on a vehicle lamp on the own lane side and forming a first additional light distribution pattern that overlaps a part of the first cutoff line and includes a region above the first cutoff line on the vertical virtual screen. Two optical systems;
A vehicular lamp system comprising:   The first additional light distribution pattern is formed by light that forms an angle of 3 ° or more on the opposite lane side in the vehicle left-right direction with respect to the front direction of the vehicle lamp on the own lane side. Item 2. A vehicle lamp system according to Item 1.   A third optical system that is provided in the vehicle lamp on the own lane side and that forms a second low beam light distribution pattern having a second cut-off line at an upper end portion on the opposite lane side on the vertical virtual screen; The vehicular lamp system according to claim 1 or 2.   A second additional light distribution pattern is provided on the opposite lane side vehicle lamp and formed on the vertical virtual screen by the second optical system at a position symmetrical with respect to the vehicle center axis. The vehicular lamp system according to claim 3, further comprising a fourth optical system that forms a light distribution pattern. The second optical system includes a light source and a plurality of reflecting surfaces for reflecting light emitted from the light source in the vehicle lamp on the opposite lane side on which the first optical system is mounted,
The vehicular lamp system according to any one of claims 1 to 4, wherein the first additional light distribution pattern is formed by a reflective surface on a side of the vehicle among the plurality of reflective surfaces.

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