JP2005289191A - Vehicular lamp - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicular lamp which is provided on a front part of a vehicle together with a low-beam lamp, compensates illumination of the low-beam lamp, and prevents occurrence of irregular illumination. <P>SOLUTION: An additional lamp is provided on the front part of a vehicle so that a part of the light distribution pattern overlaps that of a low-beam lamp, and the brightness is set so that a high brightness area a<SB>2</SB>in the light distribution pattern is continued to a similar brightness area h<SB>2</SB>in the light distribution pattern of the low-beam lamp. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a vehicular lamp provided in addition to a passing lamp at the front of a vehicle.

  For example, fog lamps and cornering lamps are known as vehicle lamps provided in addition to the passing lamps at the front of the vehicle. As described in Patent Document 1, these additional lamps are light sources controlled based on vehicle speed, steering wheel steering angle, signals from a navigation system, and the like, so that illumination suitable for the traveling state of the vehicle is achieved. It becomes possible to provide.

By the way, although such an additional lamp is extremely effective in terms of compensating for the illumination of the passing lamp (passing beam), unevenness occurs between the illumination range of the passing lamp and the illumination range of the additional lamp. There is a risk that the line of sight is unnaturally induced and the driver is stressed.
Japanese Patent Laid-Open No. 10-175478

  The present invention has been made in view of the above problems, and is provided with a passing lamp at the front of the vehicle, can compensate for the illumination of the passing lamp, and can prevent uneven illumination. It is an issue to provide a lighting fixture.

  In order to solve the above-mentioned problem, the invention according to claim 1 is provided at the front portion of the vehicle so that a part of the light distribution pattern overlaps the passing lamp, and a high luminous intensity area in the light distribution pattern is arranged in the distribution of the passing lamp. The vehicular lamp is characterized in that the light intensity is set so as to be connected to the same light intensity region in the light pattern.

  According to a second aspect of the present invention, in the vehicular lamp according to the first aspect, the vehicle lamp is formed integrally with the passing lamp, and can be adjusted in aiming simultaneously with the passing lamp by tilting together with the passing lamp. And

  The invention according to claim 3 is the vehicle lamp according to claim 1 or 2, wherein the light distribution pattern formed by combining the light distribution pattern and the light distribution pattern of the passing lamp is one-dimensional or The luminous intensity is set so that the maximum value of the luminous intensity is one place when the luminous intensity distribution is taken two-dimensionally, and the color temperature of the irradiation light is within ± 15% with respect to the color temperature of the irradiation light of the passing lamp. It is set so that it may become.

  According to a fourth aspect of the present invention, in the vehicular lamp according to any one of the first to third aspects, the vehicle speed, the acceleration or attitude of the vehicle, the steering angle of the steering wheel, the operation amount of the accelerator pedal or the brake pedal, and the direction It is connected to a control device that detects an operation signal of an indicator or a wiper switch or a signal from a navigation system, and light distribution is controlled by the control device based on a detection result of the control device.

  The vehicular lamp according to the present invention is provided at the front portion of the vehicle so that the passing lamp and a part of the light distribution pattern overlap each other, and the high luminous intensity region in the light distribution pattern is the same luminous intensity in the light distribution pattern of the passing lamp. Since the light intensity is set so as to be continuous with the area, it is possible to supplement the illumination of the passing lamp and to prevent the occurrence of uneven illumination.

  The best mode for carrying out the present invention will be described with reference to the drawings.

  FIG. 1 shows a schematic configuration of a vehicular lamp according to the present embodiment. This vehicular lamp (hereinafter referred to as “additional lamp”) 1 is adjacent to a headlamp 5 that irradiates a low beam and a high beam as a passing lamp and a running lamp inside a lamp chamber 4 formed by a housing 2 and a lens 3. The headlamp unit 6 is provided with the headlamp 5 and provided on the left and right of the front portion of the vehicle.

  Specifically, the headlamp 5 is attached to the housing 2 via a bracket 7 and is rotated in a horizontal plane by a drive mechanism 8 (see FIG. 2). The headlamp 5 includes a bulb 9 that can switch and irradiate a low beam and a high beam, and a bowl-shaped reflector 10 that reflects light emitted from the bulb 9 forward. The bracket 7 extends in the vehicle width direction, the reflector 10 is fixed to the front surface by a plurality of screws (not shown), and the plate 11 is tiltably attached to the housing 2 by a pivot and screws (not shown); The plate 11 includes an extending portion 12 extending forward from the inner side in the vehicle width direction, and a hook-shaped portion 13 formed from the front portion of the extending portion 12 toward the inner side in the vehicle width direction and opened forward. . The bowl-shaped portion 13 serves as a reflector of the additional lamp 1, and the reflector 13 is provided with a bulb 14, and the irradiation light (auxiliary beam) of the bulb 14 is reflected by the reflector 13 to irradiate the irradiation light (passing beam) of the headlamp 5. ) In the vehicle width direction outside (see FIG. 3).

  The headlamp 5, the additional lamp 1, and the drive mechanism 8 are connected to the control device 15 as shown in FIG. The control device 15 detects the vehicle speed, the acceleration and attitude of the vehicle, the steering angle of the steering wheel, the operation amount of the accelerator pedal and the brake pedal, the operation signal of the direction indicator and the wiper switch, and the signal from the navigation system by various sensors. In addition to controlling the light distribution of the headlamp 5 and the additional lamp 1 according to the traveling state and the traveling environment of the vehicle, the drive mechanism 8 is driven to rotate the bracket 7 in the horizontal plane, so that the headlamp 5 and the additional lamp 1 are added. Let the light 1 swivel. Further, the bracket 7 is tilted in the vertical and horizontal directions in accordance with the forward and backward movement of the mounting screw of the plate 11 so that the headlamp 5 and the additional lamp 1 can be integrally adjusted for aiming.

FIG. 4A shows a light distribution pattern of a passing beam when the headlamp 5 of the headlamp unit 6 on the right side of the vehicle is turned on. FIG. 4B shows the additional lamp 1 of the headlamp unit 6. The light distribution pattern of the auxiliary beam when turned on is shown. FIG. 4C shows a combined light distribution pattern obtained by combining these light distribution patterns (that is, when the headlamp 5 and the additional lamp 1 are both turned on). FIG. 5 shows one-dimensional changes in luminous intensity in the left-right direction and the up-down direction. As is clear from each figure, the light distribution pattern of the passing beam has a high luminous intensity area h ₁ of 10000 cd or more in front of the front of the vehicle, and a relatively high luminous intensity area h ₂ of 5000 cd or more and less than 10000 cd around it. . Further, around this luminous area h ₂ , luminous intensity area h ₃ of 2000 cd or more and less than 5000 cd, luminous intensity area h ₄ of 1000 cd or more and less than 20000 cd, luminous intensity area h ₅ of 500 cd or more and less than 1000 cd, and luminous intensity area h _{6 of} less than 500 cd in order. Have. On the other hand, the light distribution pattern of the auxiliary beam has a maximum luminous intensity range a ₂ of 5000 cd or more and less than 10000 cd on the outer side in the vehicle width direction, a luminous intensity range a ₃ of 2000 cd or more and less than 5000 cd, and a luminous intensity range a of 1000 cd or more and less than 20000 cd. ₄ , having a luminous intensity range a ₅ of 500 cd or more and less than 1000 cd and a luminous intensity range a _{6 of} less than 500 cd in order. In the synthetic light distribution pattern, the luminous intensity range a ₂ is continuous with the luminous intensity range h ₂ to form a luminous intensity range s ₂ of 5000 cd or more and less than 10,000 cd, and the luminous intensity range a ₃ is continuous with the luminous intensity range h ₃ and is a luminous intensity range of 2000 cd or more and less than 5000 cd. s ₃ is formed, the luminous intensity range a ₄ is continuous with the luminous intensity range h _4, and the luminous intensity range s ₄ of 1000 cd or more and less than 2000 cd is formed, and the luminous intensity range a ₅ is continuous with the luminous intensity range h ₅ and the luminous intensity range s ₅ of 500 cd or more and less than 1000 cd. And the luminous intensity range a ₆ continues to the luminous intensity range h ₆ to form a luminous intensity range s _{6 of} less than 500 cd. Here, the light intensity region a being connected to the light intensity region h means that the light intensity region a has a portion overlapping the light intensity region h in the portion where the light distribution pattern of the passing beam and the light distribution pattern of the auxiliary beam overlap. In addition, the portion of the auxiliary beam light distribution pattern that does not overlap the light distribution pattern of the passing beam is equal to or thicker than the light distribution pattern of the lower beam (larger in the vertical direction in FIG. 4). The luminous intensity range a _{2 at} is thicker than the luminous intensity range h ₂ in the light distribution pattern of the passing beam.

In the present embodiment, the high light intensity range a ₂ in the light distribution pattern of the additional lamp 1 is set so as to be connected to the same light intensity area h ₂ in the light distribution pattern of the headlamp 5. The illumination of the headlamp 5 can be supplemented, and the occurrence of illumination unevenness can be prevented. Here, in particular, the other light intensity regions in the light distribution pattern of the additional lamp 1 are also continuous with the same light intensity regions in the light distribution pattern of the headlight 5, so that the entire light distribution of the additional lamp 1 is naturally distributed without any unevenness. It will be connected to the light distribution of the lighting 5. Furthermore, since the portion of the auxiliary beam light distribution pattern that does not overlap the light distribution pattern of the passing beam is equal to or thicker than the light distribution pattern of the passing beam, the additional light 1 is cut from the front of the vehicle. Even the part of the line can be illuminated uniformly.

  In addition, as to whether or not the same luminous intensity regions are connected, as described above, the luminous intensity distribution is such that the entire illumination range is divided into several stages (about three stages to about nine stages) with a width of several hundred cd to several thousand cd. For example, as shown in FIG. 5, the luminous intensity change curve of the combined light distribution pattern along an arbitrary direction (the horizontal direction and the vertical direction in FIG. 5) may be used. In the case where the maximum value m is at one place, the same high luminous intensity region is continuously connected to effectively prevent uneven brightness, and it is difficult for the driver to remember visual fatigue.

Further, from the viewpoint of suppressing visual fatigue, the color temperature of the auxiliary beam is preferably within a range of ± 15% with respect to the color temperature of the passing beam, and the thickness of the illuminance 5lx region of the light distribution pattern of the auxiliary beam (see FIG. The dimension L ₁ ) in FIG. 4 is equal to or larger than the thickness (dimension L ₂ in FIG. 4) of the region of illuminance 20 lx of the light distribution pattern when the passing beam is an HID light source. In some cases, it is desirable that the thickness of the light distribution pattern is equal to or greater than the thickness of the area of illuminance 14 lx.

  Furthermore, in order for the additional lamp 1 to sufficiently supplement the illumination of the passing beam, the optical axis of the additional lamp 1 is 0 ° to 40 ° (preferably 30 ° to 40 °) with respect to the vehicle longitudinal direction. The diffusion width of the region with illuminance of 5 lx is preferably in the range of 40 ° to 70 ° (preferably 60 ° to 70 °) with the optical axis as the center, so that the diffusion reach of the region with illuminance of 5 lx is reached. The (boundary angle covered by the same region) is preferably in the range of 55 ° to 90 ° with respect to the vehicle longitudinal direction.

  In the first embodiment, the reflector 13 of the additional lamp 1 is integrally provided on the bracket 7 for attaching the headlamp 5 to the vehicle body (housing 2). However, in this embodiment, the additional lamp, the headlamp, Are directly integrated, and the others are the same as in the first embodiment.

  The headlamp unit according to this embodiment includes a headlamp 16 and an additional lamp 17 shown in FIG. 6 in a lamp chamber formed inside a housing and a lens (not shown). The headlamp 16 includes a bulb 18 and a reflector 19, and the additional lamp 17 includes a bulb 20 and a reflector 21, and the reflector 19 and the reflector 21 are integrated. Thereby, by tilting the reflector 19 in the vertical and horizontal directions, the reflector 21 is also tilted, and the aiming adjustment of the headlamp 16 and the additional lamp 17 can be performed simultaneously.

  Also in this embodiment, since the high light intensity region in the light distribution pattern of the additional lamp 17 is set to be connected to the same light intensity region in the light distribution pattern of the headlight 16, the additional lamp 17 is the headlight 16. Can be supplemented, and the occurrence of uneven illumination can be prevented.

  Note that the present invention is not limited to the above-described embodiment. For example, in the above embodiments, the head lamp unit on the right side of the vehicle has been described. Further, in each of the above embodiments, the additional lamp and the headlamp constitute the headlamp unit. However, the two lamps may be separately attached to the vehicle body without constituting one headlamp unit. In addition, the luminous intensity of the additional lamp is set so that the maximum value of the luminous intensity distribution of the combined light distribution pattern is not one-dimensional but two-dimensional (for example, over the paper surface of FIG. 4C). Of course, it may be.

(A) is a front view of the additional lamp according to the first embodiment, (B) is a front view of the additional lamp of (A) and a headlamp adjacent thereto, and (C) is a front view of the additional lamp and headlight of (B). It is explanatory drawing which shows the horizontal cross section of the headlamp unit provided with the lamp | ramp. It is a block diagram which shows schematic structure for controlling light distribution of an additional lamp and a headlamp. It is explanatory drawing which shows the passing light distribution by a headlamp, and the auxiliary light distribution by an additional lamp. (A) is a light distribution pattern of a headlamp, (B) is a light distribution pattern of an additional lamp, (C) is a distribution obtained by combining the light distribution pattern of (A) and the light distribution pattern of (B). It is explanatory drawing which shows a light pattern. It is explanatory drawing which shows the luminous intensity change curve about the light distribution pattern of FIG.4 (C). It is explanatory drawing which shows the additional lamp and headlamp which concern on Example 2. FIG.

Explanation of symbols

1,17 Additional light (vehicle lamp)
5 Headlamp 15 Control device a ₂ luminous intensity range (high luminous intensity range)
h ₂ intensity range

Claims (4)

  It is provided at the front of the vehicle so that a part of the light distribution pattern of the passing lamp overlaps, and the light intensity is set so that the high light intensity range in the light distribution pattern is linked to the same light intensity range in the light distribution pattern of the passing lamp A vehicular lamp characterized by being made. The vehicular lamp according to claim 1,
A vehicular lamp, wherein the vehicular lamp is integrally formed with the passing lamp, and can be adjusted at the same time as the passing lamp by tilting together with the passing lamp. The vehicular lamp according to claim 1 or 2,
For the light distribution pattern obtained by synthesizing the light distribution pattern and the light distribution pattern of the passing lamp, the luminous intensity is such that the maximum value of the luminous intensity is one place when the luminous intensity distribution is taken one-dimensionally or two-dimensionally. Is set such that the color temperature of the irradiation light is within ± 15% of the color temperature of the irradiation light of the passing lamp. The vehicular lamp according to any one of claims 1 to 3,
Connected to a control device that detects vehicle speed, vehicle acceleration or attitude, steering wheel steering angle, accelerator pedal or brake pedal operation amount, direction indicator or wiper switch operation signal, or signal from a navigation system, the control device A vehicle lamp characterized in that light distribution is controlled by the control device on the basis of the detection result.

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