JP2013225401A - Vehicle lighting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle lighting fixture capable of restraining increase in a number of components while securing visibility.SOLUTION: Headlight devices 11a, 11b of a vehicle lighting device respectively include first light sources 13, second light sources 14 having a S/P ratio (a ratio of scotopic luminance to photopic luminance) higher than that of the first light sources 13, storage sections 12 for forming optical control sections, and aspheric convex lenses 15. The storage section 12 and the aspheric convex lens 15 control light distributions so as to make light from the first light source irradiate to a little inner side in a vehicle width direction in a front of a vehicle. Further, the storage section 12 and the aspheric convex lens 15 control the light distributions so as to make light from the second light source irradiate an outside in the vehicle width direction in the front of the vehicle. The storage section 12 for forming the optical control section internally has a reflection plate 16 as a partition section for partitioning light of the first light source 13 and the second light source 14 in the storage section 12 as one case.

Description

  The present invention relates to a vehicle lighting device.

2. Description of the Related Art Conventionally, a vehicular illumination device is configured to include a pair of headlamp devices in front of a vehicle, as disclosed in Patent Document 1, for example.
Further, the vehicle lighting device of Patent Document 1 has at least two light sources (photoelectric elements) having different spectral characteristics, and the spectral characteristics of one light source are adjusted so as to have a peak wavelength in a blue-green range. ing. With such a configuration, the peak wavelength of one of the light sources is set to around 507 nm, and human visibility can be ensured in a dimmed vision environment or a dark place vision environment.

Special table 2003-503815 gazette

  By the way, in the vehicle lighting fixture as described above, the spectral characteristic of one of the two types of light sources has a peak wavelength in a blue-green range, thereby ensuring visibility. Such a vehicle lighting device is provided with two types of light sources that irradiate light having two types of spectral characteristics. Therefore, the number of components naturally increases, and accordingly, the number of components other than the light source may increase. Is done.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a vehicle lighting device that can suppress an increase in the number of components while ensuring visibility.

  In order to solve the above-described problem, the headlamp device of the present invention has a first light source and an S / P ratio, which is a ratio of dark place visual brightness and photopic brightness, higher than that of the first light source. Light distribution control so that the light from the second light source and the light from the first light source are emitted toward the inside in the vehicle width direction in front of the vehicle, and the light from the second light source in the vehicle in front of the vehicle And an optical control unit that controls the light distribution so that the light is emitted outward in the width direction.

Moreover, in the said structure, it is preferable that an optical control part is provided with the division part which partitions off the light of a said 1st light source and a said 2nd light source within one housing | casing.
Moreover, in the said structure, it is preferable that a partition part is comprised by the reflecting plate which reflects the light of a said 1st light source and a said 2nd light source.

  In the above configuration, the optical control unit controls the light distribution so that a part of the light from at least one of the first light source and the second light source is irradiated in a direction intersecting the traveling direction of the vehicle. It is preferable to do.

  In the above configuration, the optical control unit controls the light distribution so that the light from the first light source is emitted toward the inside in the vehicle width direction in front of the vehicle, and the light from the second light source is A first light distribution control unit that controls the light distribution so that the light is emitted to the outside in the vehicle width direction in front of the vehicle; and the first light source and the second light source formed integrally with the first light distribution control unit. It is preferable to include a second light distribution control unit that performs light distribution control so that a part of light from at least one is irradiated in a direction intersecting with the traveling direction of the vehicle.

  In the above configuration, the optical control unit emits light from the first light source corresponding to the first and second light sources provided on the other side in the vehicle width direction toward the inside in the vehicle width direction in front of the vehicle. And a third light distribution control unit that controls the light distribution so that the light from the second light source is emitted to the outside in the vehicle width direction in front of the vehicle. The light distribution control unit and the second light distribution control unit are provided on one side in the vehicle width direction so as to correspond to the first and second light sources provided on one side in the vehicle width direction, and the third light distribution control The part is preferably provided on the other side in the vehicle width direction so as to correspond to the first and second light sources provided on the other side in the vehicle width direction.

  In the above configuration, the optical control unit controls the light distribution so that the light from the first light source is emitted toward the inside in the vehicle width direction in front of the vehicle, and the light from the second light source is A light distribution control unit that performs light distribution control so that light is emitted to the outside in the vehicle width direction in front of the vehicle; and a reflective material that is formed on the light distribution control unit, wherein the reflective material is the first light source. Preferably, the light distribution is controlled so that a part of the light from at least one of the second light sources is irradiated in a direction intersecting the traveling direction of the vehicle.

  In the above configuration, it is preferable that the optical control unit controls the light distribution so that a part of the light from the second light source is irradiated in a direction intersecting the traveling direction of the vehicle.

  ADVANTAGE OF THE INVENTION According to this invention, the lighting fixture for vehicles which can suppress the increase in a number of parts can be provided, ensuring visibility.

It is a top view which shows a part of vehicle provided with the illuminating device for vehicles of embodiment. It is a schematic block diagram of the headlamp apparatus of the illuminating device for vehicles. It is explanatory drawing for demonstrating the irradiation area by the illuminating device for vehicles. It is explanatory drawing for demonstrating a driver | operator's visual field. It is a schematic block diagram of the headlamp apparatus of the vehicle illuminating device of another example. (A) is a front view of the headlamp apparatus of the vehicle lighting device same as the above, (b) is a side view, and (c) is a plan view. It is explanatory drawing for demonstrating the irradiation area by the vehicle illuminating device same as the above. (A) is a front view of the headlamp apparatus of the vehicle illuminating device of another example, (b) is a side view, (c) is a top view. (A) is a front view of the headlamp apparatus of the vehicle illuminating device of another example, (b) is a top view.

Hereinafter, an embodiment embodied in a vehicular lighting device of the present invention will be described with reference to the drawings.
As shown in FIG. 1, the vehicle illumination device includes a pair of headlamp devices 11 a and 11 b on the front side in the traveling direction of the vehicle C.

  As shown in FIG. 1, each of the headlamp devices 11a and 11b includes a housing part 12, a first and second light sources 13 and 14, a non-spherical convex lens 15, and a reflection as a partition part. A plate 16. One headlamp device 11a is a headlight device in the left direction of the vehicle C, and the other headlamp device 11b is a headlight device in the right direction of the vehicle C.

  As shown in FIGS. 1 and 2, the accommodating portion 12 has a substantially hollow dome shape, and its inner peripheral surface 12 a is plated to reflect the light from the light sources 13 and 14. In the accommodating part 12, the reflecting plate 16, the 1st light source 13, and the 2nd light source 14 are accommodated. The accommodating portion 12 is partitioned so that the accommodating space is divided into two in the left-right direction by the reflecting plate 16.

  Next, the arrangement of each light source provided in the headlamp device will be described. In addition, since the headlamp apparatus 11b of this embodiment is the structure which reversed the headlamp apparatus 11a in the center of the width direction (vehicle width direction) of the vehicle C, in FIG. 2, one headlamp apparatus 11a is shown. Only the detailed arrangement of the light source of the other headlamp device 11b is omitted.

  As shown in FIG. 2, the first light source 13 of the headlamp device 11 a is provided on the outer side surface in the vehicle width direction of the reflector 16 so as to be provided in the outer space in the vehicle width direction inside the housing portion 12. It is fixed to 16a.

  As shown in FIG. 2, the second light source 14 of the headlamp device 11 a is provided on the inner side surface in the vehicle width direction of the reflector 16 so as to be provided in the inner space in the vehicle width direction inside the housing portion 12. 16b. The second light source 14 is configured to have a spectral characteristic having a higher S / P ratio than the first light source 13 (for example, the S / P ratio is 2.0 or more). The S / P ratio refers to the dark visual brightness Ls calculated by adding the spectral characteristics of the lamp to the spectral luminous efficiency V ′ (λ) in the dark place, and the spectral visual feeling in the bright place. It is a ratio with the photopic brightness Lp calculated by integrating the spectral characteristics of the lamp with the efficiency V (λ).

  As shown in FIG. 2, the aspherical convex lens 15 includes a light introduction portion 15 a having a substantially planar shape and a light emitting portion 15 b having an aspherical convex shape. The aspherical convex lens 15 has the light introducing portion 15a disposed on the front surface (opening) side of the housing portion 12 so as to face the first light source 13 and the second light source 14, and the light emitting portion 15b has the light. When the introduction part 15a is used as a reference, the introduction part 15a is disposed so as to be separated from the storage part 12. The aspherical convex lens 15 is configured to emit light incident from the light introducing portion 15a from the light emitting portion 15b side.

Next, the operation of the vehicular illumination device including the headlamp devices 11a and 11b configured as described above will be described.
When the headlamp devices 11a and 11b of the vehicle lighting device are shifted from the off state to the on state by an operation switch (not shown) provided in the vehicle C, the light sources 13 and 14 of the headlamp devices 11a and 11b, respectively. Lights up.

  At this time, as shown in FIG. 3, at least a part of the light emitted from the first light source 13 is reflected by the inner peripheral surface 12a of the accommodating portion 12 and is incident on the light introducing portion 15a, and the light emitting portion 15b. To the area A1 closer to the inside in the vehicle width direction in the traveling direction (front) of the vehicle C. This area A1 is a driver's visual field area Ar1 (refer to FIG. 4) in which cells called cones mainly react when the driver looks at the front of the vehicle C.

  Further, as shown in FIG. 3, at least a part of the light emitted from the second light source 14 is reflected by the inner peripheral surface 12a of the accommodating portion 12 and is incident on the light introducing portion 15a, and then from the light emitting portion 15b. Irradiated to an area A2 closer to the outside in the vehicle width direction in the traveling direction (front) of the vehicle C. That is, since light with a high S / P ratio is irradiated to the area A2 that is closer to the outer side in the vehicle width direction, cells called rods distributed in the peripheral part of the human retina react, so the area A2 and the driver Visibility in the visual field area Ar2 (see FIG. 4) can be ensured. In particular, since the area A2 is outside in the vehicle width direction, it is easy to find (recognize) pedestrians located on both sides of the road width direction such as sidewalks, and it is possible to contribute to accident prevention and to drive comfortably. ing.

Next, characteristic effects of the present embodiment will be described.
(1) The headlamp devices 11a and 11b of the vehicle lighting device respectively constitute a first light source 13, a second light source 14 having a higher S / P ratio than the first light source 13, and an optical control unit. And an aspherical convex lens 15. The housing part 12 and the aspherical convex lens 15 perform light distribution control so that light from the first light source is emitted toward the inside in the vehicle width direction in front of the vehicle. Further, the housing portion 12 and the aspherical convex lens 15 perform light distribution control so that light from the second light source is emitted to the outside in the vehicle width direction in front of the vehicle. The accommodating part 12 constituting the optical control part has a reflecting plate 16 as a partitioning part for partitioning the light of the first light source 13 and the second light source 14 in the accommodating part 12 as one housing. Is provided. Thus, by providing the first light source 13 and the second light source 14 in the housing portion 12 that is one housing, the number of parts (the number of housings) can be suppressed. Moreover, since the light of each 1st light source 13 and the 2nd light source 14 is divided by the reflecting plate 16, the light of each light source 13 and 14 can be controlled.

  (2) Since the partition plate is configured by the reflecting plate 16, the light from the first and second light sources 13 and 14 can be reflected, so that the decrease in the amount of light emitted by the light sources 13 and 14 is suppressed. Can do.

(Second Embodiment)
Hereinafter, a second embodiment of the present invention will be described with reference to FIGS. In addition, about the same member as 1st Embodiment, the same code | symbol is attached | subjected and all or one part of drawing and description is omitted.

  As shown in FIG. 7, the vehicle illumination device includes a pair of headlamp devices 21 a and 21 b on the front side in the traveling direction of the vehicle C. One headlamp device 21b is a headlamp device in the right direction of the vehicle C, and has the same configuration as the headlamp device 11b of the first embodiment. The aspherical convex lens 15 of the headlamp device 21b corresponds to the third light distribution control unit in the claims. The other headlamp device 21a is a left-hand headlamp device of the vehicle C, and has a lens configuration different from that of the headlamp device 11a of the first embodiment.

  As shown in FIGS. 5 and 6, the lens 22 of the headlamp device 21a includes a substantially planar light input / output part 22a, a curved light emitting part 22b, and a substantially planar light reflecting part 22c. Formed and configured. The light entrance / exit part 22a is configured to have a substantially circular shape in a plan view. The lens 22 is disposed so that the light entrance / exit part 22a faces the front part of the housing part 12, and the light exit part 22b and the light reflection part 22c are based on the light entrance / exit part 22a. It arrange | positions so that it may become a position spaced apart from the accommodating part 12. FIG.

As shown in FIGS. 6A and 6B, the light emitting portion 22b is configured to have a curved surface shape.
As shown in FIGS. 6A to 6C, the light reflecting portion 22c is formed on the outer side in the vehicle width direction (left side in FIG. 6) than the light emitting portion 22b. The light reflecting portion 22c is for totally reflecting or partially reflecting a part of the light incident from the light input / output portion 22a. Further, the light reflecting portion 22c is formed to have a curved shape in a top view as shown in FIG. The light reflecting portion 22c has a shape protruding outward in the vehicle width direction from the curved surface of the light emitting portion 22b.

Next, the operation of the vehicular illumination device including the headlamp devices 11a and 11b configured as described above will be described.
When the headlamp devices 11a and 11b of the vehicle lighting device are shifted from the off state to the on state by the operation switch provided in the vehicle C, the light sources 13 and 14 of the headlamp devices 11a and 11b are turned on. .

  At this time, as shown in FIGS. 5 and 7, at least a part of the light emitted from the first light source 13 is reflected by the inner peripheral surface 12a of the housing portion 12 and is incident on the light input / output portion 22a. The light is emitted from the emitting portion 22b to the area A1 closer to the inside in the vehicle width direction in the traveling direction (front) of the vehicle C.

  Further, as shown in FIGS. 5 and 7, a part of the light emitted from the second light source 14 is reflected by the inner peripheral surface 12a of the accommodating portion 12 and is incident on the light entering / exiting portion 22a, and the light emitting portion 22b. To the area A2 on the outer side in the vehicle width direction in the traveling direction (front) of the vehicle C.

  Further, as shown in FIGS. 5 and 7, a part of the light emitted from the second light source 14 enters from the light input / output part 22a. When the incident light is reflected by, for example, the light reflecting portion 22c, the light entering / exiting portion 22a is emitted in the lateral direction and the rearward direction, and the lateral direction and rearward area A3 of the vehicle C is irradiated. Become. In this way, light with a high S / P ratio is irradiated in the lateral direction and the rearward direction, so that it is easy to recognize the presence of pedestrians and motorcycles in the area A3, contributing to accident prevention and driving comfortably. It is possible to do.

As described above, according to the second embodiment, in addition to the same effects as (1) and (2) of the first embodiment, the following effects are obtained.
(3) The lens 22 constituting the optical control unit controls the light distribution so that a part of the light from the second light source 14 is irradiated in a direction intersecting the traveling direction of the vehicle C. In this way, by irradiating light in a direction crossing the traveling direction of the vehicle (at least one of the side direction and the rear direction of the headlamp device), the existence of a pedestrian or a two-wheeled vehicle can be recognized and reduced. Further, since the light irradiated in the lateral and backward directions is light from the second light source 14, that is, light having a high S / P ratio, visibility can be further ensured.

  (4) The lens 22 includes a light emitting unit 22b as a first light distribution control unit and a light reflecting unit 22c as a second light distribution control unit. The light emitting unit controls the light distribution so that the light from the first light source 13 is emitted toward the inner side in the vehicle width direction in the front direction of the vehicle, and the light from the second light source in the front direction of the vehicle. The light distribution is controlled so that the light is emitted outward in the vehicle width direction. The light reflecting portion 22c is integrally formed with the light emitting portion 22b so as to reflect a part of the light from the second light source 14 and to be irradiated in a direction intersecting with the traveling direction of the vehicle C. Light control. In this way, by integrally forming the light emitting part 22b and the light reflecting part 22c, the light from the second light source 14 is irradiated by the single lens 22 in the vehicle width direction outer side and the direction intersecting the traveling direction. can do.

  (5) The aspherical convex lens 15 constituting the third light distribution control unit is provided to correspond to the first and second light sources 13 and 14 of the headlight device 21b provided on one side (right side) in the vehicle width direction. . And in order to correspond to the 1st and 2nd light sources 13 and 14 of the headlamp apparatus 21a with which the other side (left side) of a vehicle width direction is equipped, the light emission part 22b and 2nd as a 1st light distribution control part The lens 22 having a light reflection part 22c as a light distribution control part is provided. By adopting such a configuration, for example, on a road having two or more lanes in the traveling (advancing) direction, the vehicle C travels in the overtaking lane (second lane) while the vehicle C is traveling in the lane (first lane). It is suppressed that the vehicle which carries out is irradiated with light with a high S / P ratio. Thereby, it can suppress giving the light which becomes glare to the driver | operator who drives the vehicle which drive | works a passing lane. Further, by suppressing the number of lenses 22 whose lens shape is complicated compared to the aspherical convex lens 15, it is possible to suppress an increase in cost.

Each embodiment of the present invention may be modified as follows.
In the second embodiment, the light reflecting portion 22c of the lens 22 has a shape protruding outward in the vehicle width direction from the curved surface of the light emitting portion 22b. However, the present invention is not limited to this. For example, as shown in FIG. 8, the light reflecting portion 22c may be configured not to protrude beyond the virtual curved surface K1 formed by the light emitting portion 22b. In FIG. 8, the light reflecting portion 22c is configured to have a shape in which a part of the aspherical convex lens 15 of the first embodiment is cut out.

In the second embodiment, the configuration is such that the light from the second light source 14 is irradiated in a direction that intersects the traveling direction of the vehicle C depending on the shape (configuration) of the lens.
For example, as shown in FIG. 9, a configuration in which a reflecting material 15a is formed on the light introducing portion 15a of the aspherical convex lens 15 to be reflected by the reflecting material 15a may be employed. By setting it as such a structure, the light from the 2nd light source 14 can be irradiated to the direction (side or back direction) which cross | intersects the advancing direction of the vehicle C, without complicating the shape (configuration) of a lens. It becomes possible.

  In the second embodiment, the light from the second light source 14 is irradiated in the direction intersecting the traveling direction of the vehicle C. In addition, the light from the first light source 13 is applied to the second light. A configuration of irradiating in substantially the same direction as the light source 14 may be adopted. Moreover, it is good also as a structure which irradiates only the light from the 1st light source 13 in the direction which cross | intersects the advancing direction of the vehicle C. FIG.

  In the second embodiment, the light from the second light source 14 is irradiated in the lateral direction and the backward direction that intersect the traveling direction. In addition to this, in the vertical downward direction (road surface side) A configuration for irradiating light is desirable. By adopting such a configuration, it is possible to prevent the driver of the following vehicle from being irradiated with light that can cause glare.

  In each of the above embodiments, the S / P ratio of the second light source 14 is defined as, for example, 2.0 or more, but is not limited thereto. Any configuration may be used as long as the S / P ratio of the second light source 14 is higher than that of the first light source 13.

In each of the above embodiments, the partition portion is configured by the reflecting plate 16, but is not limited thereto.
In each of the above embodiments, the headlamp device is turned on / off by an operation switch (not shown). For example, the illuminance sensor or the like is used to detect the illuminance around the vehicle C and automatically turn it on / off. You may employ | adopt the structure switched.

  DESCRIPTION OF SYMBOLS 12 ... Storage part which comprises a housing | casing, 13 ... 1st light source, 14 ... 2nd light source, 15 ... Aspherical convex lens as a 3rd light distribution control part which comprises an optical control part, 16 ... As a division part Reflector, 22... Lens constituting optical control unit, 22 b. Light emitting unit constituting first optical control unit, 22 c. Light reflecting unit constituting second optical control unit, 15 a. Reflecting material, C.

Claims (7)

A first light source;
A second light source having a higher S / P ratio than the first light source, which is a ratio of dark place brightness and photo place brightness;
Light distribution control is performed so that light from the first light source is emitted toward the inside in the vehicle width direction in front of the vehicle, and light from the second light source is emitted to the outside in the vehicle width direction in front of the vehicle. An optical control unit for controlling light distribution as described above,
The vehicular illumination device, wherein the optical control unit includes a partition unit that partitions light of the first light source and the second light source in one housing. The vehicle lighting device according to claim 1,
The vehicular lighting device, wherein the partition portion is configured by a reflector that reflects light from the first light source and the second light source. In the vehicle lighting device according to claim 1 or 2,
The optical control unit performs light distribution control so that a part of light from at least one of the first light source and the second light source is irradiated in a direction intersecting a traveling direction of the vehicle. The vehicle lighting device. The vehicle lighting device according to claim 3,
The optical control unit controls the light distribution so that the light from the first light source is emitted toward the inner side in the vehicle width direction in the front direction of the vehicle, and the light from the second light source is forward of the vehicle. A first light distribution control unit that performs light distribution control so that the light is emitted to the outside in the vehicle width direction, and is integrally formed with the first light distribution control unit and is formed from at least one of the first light source and the second light source. A vehicle lighting device comprising: a second light distribution control unit that performs light distribution control so that a part of the light is irradiated in a direction that intersects a traveling direction of the vehicle. The vehicle lighting device according to claim 4,
The optical control unit emits light from the first light source toward the inside in the vehicle width direction in front of the vehicle so as to correspond to the first and second light sources provided on one side in the vehicle width direction. A third light distribution control unit that controls the light distribution so that the light from the second light source is irradiated in the vehicle width direction outside in front of the vehicle,
The first light distribution control unit and the second light distribution control unit are provided on one side in the vehicle width direction so as to correspond to the first and second light sources provided on one side in the vehicle width direction,
The third light distribution control unit is provided on the other side in the vehicle width direction so as to correspond to the first and second light sources provided on the other side in the vehicle width direction. The vehicle lighting device according to claim 3,
The optical control unit controls the light distribution so that the light from the first light source is emitted toward the inside in the vehicle width direction in front of the vehicle, and the light from the second light source in the front of the vehicle. A light distribution control unit that performs light distribution control so that the light is emitted to the outside in the vehicle width direction, and a reflective material that is deposited on the light distribution control unit,
The reflective material controls light distribution so that a part of light from at least one of the first light source and the second light source is irradiated in a direction intersecting a traveling direction of the vehicle. Vehicle lighting device. In the vehicle lighting device according to any one of claims 3 to 6,
The vehicular illumination device, wherein the optical control unit performs light distribution control so that a part of light from the second light source is irradiated in a direction intersecting a traveling direction of the vehicle.