JP2019169330A - Vehicular lighting fixture - Google Patents

Abstract

To suppress deterioration of peak luminous intensity in the horizontal direction of a plurality of irradiation regions formed in the case where a light source arranged far away from the center of a projection lens is lighted relatively bright, compared to the case where the light source arranged close to the center of the projection lens is lighted relatively bright, in a vehicular lighting fixture.SOLUTION: A vehicular lighting fixture includes: a first optical system 20 including a first projection lens 23, and a plurality of first light sources 22 for forming a plurality of first irradiation regions which are arranged in the horizontal direction in a high beam region by transmitting the first projection lens 23 and turned on/off individually; and a second optical system 30 including a second projection lens 33, and a plurality of second light sources 32 for forming a plurality of second irradiation regions which are arranged in the horizontal direction in a high beam region by transmitting the second projection lens 33 and turned on/off individually in a mode of being overlapped with the plurality of first irradiation regions. The peak luminous intensity positions in the horizontal direction of the plurality of second irradiation regions are deviated in the horizontal direction with respect to the peak luminous intensity in the horizontal direction of the plurality of first irradiation regions.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a vehicular lamp, and in particular, the horizontal peak luminous intensity of a plurality of irradiation areas formed when a light source disposed far from the center of the projection lens is lit relatively brightly is the center of the projection lens. The present invention relates to a vehicular lamp that can be prevented from lowering compared to the peak luminous intensity in the horizontal direction of a plurality of irradiation areas formed when a light source arranged in the vicinity is lit relatively brightly.

  Conventionally, a projection lens, and a plurality of light sources that emit light that forms a plurality of irradiation areas that are irradiated in front through the projection lens and arranged in a row in the horizontal direction in the high beam area and individually turned on and off, A light distribution variable vehicle lamp (ADB: Adaptive Driving Beam) provided is known (see, for example, Patent Document 1 (FIG. 4 and the like)).

  The present inventors have studied to realize the function of an electronic swivel that moves the peak light intensity positions in the horizontal direction of a plurality of irradiation areas based on the steering angle or the like in the light distribution variable vehicle lamp.

Japanese Patent Laid-Open No. 2017-212170

  However, as a result of studies by the present inventors, in the above-described variable light distribution vehicle lamp, a plurality of irradiation areas formed when a light source disposed far from the center of the projection lens is lit relatively brightly. It was found that the horizontal peak luminous intensity of the light source is lower than the horizontal peak luminous intensity of the plurality of irradiation areas formed when the light source arranged near the center of the projection lens is turned on relatively brightly. .

  The present invention has been made in view of the above circumstances, and the horizontal peak luminous intensity of a plurality of irradiation areas formed when a light source disposed far from the center of the projection lens is lit relatively brightly, Provided is a vehicular lamp that can be prevented from lowering compared to the peak intensity in the horizontal direction of a plurality of irradiation areas formed when a light source disposed near the center of a projection lens is lit relatively brightly. The purpose is to do.

  To achieve the above object, according to one aspect of the present invention, there is provided a first projection lens, an irradiation point forward through the first projection lens, and arranged individually in at least one row in a horizontal direction in a high beam region. A first optical system including a plurality of first light sources that emit light that forms a plurality of first irradiation regions that are turned off, a second projection lens, and the second projection lens that is irradiated forward. A plurality of second light sources that emit light that forms a plurality of second irradiation regions that are arranged in at least one row in the horizontal direction in the high beam region and are individually turned on and off, overlapping the plurality of first irradiation regions; A vehicle in which horizontal peak luminous intensity positions of the plurality of second irradiation areas are shifted in a horizontal direction with respect to horizontal peak luminous intensity positions of the plurality of first irradiation areas. It is a light fixture To.

  According to this aspect, the horizontal peak luminous intensity of a plurality of irradiation areas formed when a light source disposed far from the center of the projection lens is lit relatively brightly is disposed near the center of the projection lens. It is possible to suppress a decrease compared to the horizontal peak luminous intensity of a plurality of irradiation areas formed when the light source is lit relatively brightly.

  This is because the horizontal peak luminous intensity positions of the plurality of second irradiation areas are shifted in the horizontal direction with respect to the horizontal peak luminous intensity positions of the plurality of first irradiation areas.

  In the above invention, a preferred aspect is that the horizontal peak luminous intensity positions of the plurality of second irradiation areas are shifted in the horizontal direction with respect to the horizontal peak luminous intensity positions of the plurality of first irradiation areas. The second optical system is arranged in a state inclined at a predetermined angle with respect to a reference axis extending in the vehicle longitudinal direction.

  In the above invention, a preferred aspect is that the horizontal peak luminous intensity positions of the plurality of second irradiation areas are shifted in the horizontal direction with respect to the horizontal peak luminous intensity positions of the plurality of first irradiation areas. The optical axis of the second projection lens is inclined at a predetermined angle with respect to a reference axis extending in the vehicle front-rear direction, and the surface shape of the back surface of the second projection lens is such that the optical axis of the second projection lens is the reference axis. It is designed to be inclined at a predetermined angle with respect to.

  In the above invention, a preferred aspect is that the horizontal peak luminous intensity positions of the plurality of second irradiation areas are shifted in the horizontal direction with respect to the horizontal peak luminous intensity positions of the plurality of first irradiation areas. The plurality of second light sources are arranged in a state rotated by a predetermined angle with respect to the focal point of the second projection lens.

  In the above invention, a preferable aspect is that the vertical length of the first irradiation region is longer than the vertical length of the second irradiation region, and the first irradiation region and the second irradiation region are The upper portion of the first irradiation region is overlapped in a state of protruding upward from the upper edge of the second irradiation region.

  In the above invention, a preferable aspect is that the first optical system is a first separator provided with the plurality of first light sources facing each other between the plurality of first light sources and the first projection lens. The first separator includes a plurality of cylindrical reflecting surfaces whose front end opening is larger than the rear end opening and narrows in a conical shape as it goes from the front end opening toward the rear end opening. The rear end openings of the plurality of cylindrical reflection surfaces and the plurality of first light sources are arranged to face each other so that the light from the first light source passes through the corresponding cylindrical reflection surfaces, The cylindrical reflection surface includes at least an upper reflection surface and a lower reflection surface, and the lower reflection surface includes an extended reflection surface extended forward from the upper reflection surface.

1 is a schematic front view of a vehicular lamp 10. FIG. (A) an example of the first light distribution pattern P1 formed by the first optical system 20, (b) an example of the second light distribution pattern P2 formed by the second optical system 30, and (c) a combined light distribution pattern P. It is an example. It is an example of the luminous intensity distribution of each light distribution pattern. FIG. 3 is a perspective view of the first optical system 20 (a first light source 22a is omitted). 2 is a side view of the first optical system 20 (except for the main optical surface). FIG. It is a front view of the board | substrate K1 in which the 1st light source 22a was mounted. It is a figure for demonstrating the positional relationship of the 1st projection lens 23 and the 1st light source 22a. FIG. 3 is a perspective view of the second optical system 30 (second light source 32a omitted). 3 is a side view of the second optical system 30 (except for the main optical surface). FIG. It is a front view of the board | substrate K2 in which the 2nd light source 32a was mounted. It is a figure for demonstrating the positional relationship of the 2nd projection lens 33 and the 2nd light source 32. FIG. It is the schematic of 2nd optical system 30A which comprises vehicle lamp 10A of a comparative example. It is an example of the luminous intensity distribution of each light distribution pattern formed by 10 A of vehicle lamps of a comparative example. 14 is a graph in which the graph G3 in FIG. 3 and the graph G6 in FIG.

  Hereinafter, a vehicular lamp 10 according to an embodiment of the present invention will be described with reference to the accompanying drawings. In each figure, corresponding components are denoted by the same reference numerals, and redundant description is omitted.

  FIG. 1 is a schematic front view of a vehicular lamp 10.

  A vehicular lamp 10 shown in FIG. 1 is a variable light distribution type vehicular headlamp (ADB: Adaptive Driving Beam), and is mounted, for example, on both the left and right sides of a front end portion of a vehicle such as an automobile. Hereinafter, the vehicle on which the vehicular lamp 10 is mounted is referred to as a host vehicle (not shown). Since the vehicular lamp 10 mounted on both the left and right sides has a symmetrical configuration, the vehicular lamp 10 mounted on the left side of the front end of the host vehicle (left side toward the front of the host vehicle) will be representatively described below. explain. Although not shown, the vehicular lamp 10 is disposed in a lamp chamber composed of an outer lens and a housing, and is attached to the housing or the like.

  As shown in FIG. 1, the vehicular lamp 10 includes a first optical system 20 disposed on the left side when viewed from the front, and a second optical system 30 disposed on the right side.

  The first optical system 20 forms a first light distribution pattern P1. FIG. 2A is an example of the first light distribution pattern P <b> 1 formed by the first optical system 20. FIG. 2A shows an example of a first light distribution pattern P1 formed in a high beam area on a virtual vertical screen (located about 25 m ahead from the front of the vehicle) facing the front of the vehicle. Has been.

As shown in FIG. 2A, the first light distribution pattern P1 includes first irradiation regions P _{22a1 to} P _22a12 arranged in a line in the horizontal direction in the high beam region. The first irradiation regions P _{22a1 to} P _22a12 are individually turned on / off (lighted in a dimmed state) in response to turning on / off (including lighting in a dimmed state) of first light sources 22a _{1 to} 22a ₁₂ described later. Included). Hereinafter, when the first irradiation areas P _{22a1 to} P _22a12 are not particularly distinguished, they are referred to as a first irradiation area P _22a . The vertical length of the first irradiation area P _22a is h1.

  FIG. 3 is an example of the luminous intensity distribution of each light distribution pattern formed by the vehicular lamp 10.

In FIG. 3, an example of the light intensity distribution in the horizontal direction of the first light distribution pattern P1 (first irradiation regions P _{22a1 to} P _22a12 ) is shown by a graph G1. Graph G1 represents the intensity distribution in the case where (for example, at a duty ratio of 100% of the PWM signal) lights up with each full power the first light source _22a 1 _{~22a 12} below.

As shown by a graph G1 in FIG. 3, the first light distribution pattern P1 (first irradiation regions P _{22a1 to} P _22a12 ) has the highest luminous intensity a1 in the vicinity of the vertical line V and goes from the vertical line V to the left and right sides. The luminous intensity distribution is asymmetrical with respect to the vertical line V.

  The second optical system 30 forms a second light distribution pattern P2. FIG. 2B is an example of the second light distribution pattern P <b> 2 formed by the second optical system 30. FIG. 2B shows an example of the second light distribution pattern P2 formed in the high beam area on the virtual vertical screen.

As shown in FIG. 2B, the second light distribution pattern P2 includes second irradiation regions P _{32a1 to} P _32a12 arranged in a line in the horizontal direction in the high beam region. The second irradiation areas P _{32a1 to} P _32a12 are individually turned on / off (lighted in a dimmed state) in response to turning on / off (including lighting in a dimmed state) of second light sources 32a _{1 to} 32a ₁₂ described later. Included). Hereinafter, when the second irradiation areas P _{32a1 to} P _32a12 are not particularly distinguished, they are referred to as second irradiation areas P _32a . The vertical length of the second irradiation region P _32a is h2 (h2 <h1).

In FIG. 3, an example of the light intensity distribution in the horizontal direction of the second light distribution pattern P2 (second irradiation regions P _{32a1 to} P _32a12 ) is shown by a graph G2. The graph G2 represents a light intensity distribution when second light sources 32a _{1 to} 32a ₁₂ described later are turned on at full power (for example, with a PWM signal having a duty ratio of 100%).

As shown by the graph G2 in FIG. 3, the second light distribution pattern P2 (second irradiation region _P 32a1 _{~P 32a12)} is highest intensity a2 of the vertical line _{V 4} on the vicinity through the left angle 4 °, vertical It has a light intensity distribution that is symmetrical with respect to the vertical line V ₄ , with the light intensity decreasing from the line V ₄ toward the left and right sides.

As described above, the peak light intensity position p2 in the horizontal direction of the second light distribution pattern P2 (second irradiation regions P _{32a1 to} P _32a12 ) is that of the first light distribution pattern P1 (first irradiation regions P _{22a1 to} P _22a12 ). It is shifted in the horizontal direction (left side in FIG. 3) with respect to the peak light intensity position p1 in the horizontal direction.

By _{superimposing} the first irradiation areas P _{22a1 to} P _22a12 shown in FIG. _2A and the second irradiation areas P _{32a1 to} P _32a12 shown in FIG. 2B, the composite arrangement shown in FIG. A light pattern P is formed. As shown in FIG. 2C, the first irradiation areas P _{22a1 to} P _22a12 and the second irradiation areas P _{32a1 to} P _32a12 are _{arranged such that} the upper _portions of the first irradiation areas P _{22a1 to} P _22a12 are the second irradiation areas P _32a1 to P _{32a1. Overlapping} in a state of protruding upward from the upper edge of P _32a12 .

  In FIG. 3, an example of the light intensity distribution in the horizontal direction of the combined light distribution pattern P is shown by a graph G3.

  As shown by the graph G3 in FIG. 3, the synthetic light distribution pattern P has a light intensity between 0 ° and 5 ° left that is substantially constant light intensity a3, and the light intensity gradually decreases as the left angle increases from there. Distribution.

Next, a configuration example of the first optical system 20 that forms the first light distribution pattern P1 (first irradiation regions P _{22a1 to} P _22a12 ) will be described.

[First optical system 20]
4 is a perspective view of the first optical system 20 (the first light source 22a is omitted), and FIG. 5 is a side view (except for the main optical surface).

As shown in FIGS. 4 and 5, the first optical system 20 includes a first separator 21, a plurality of first light sources 22 a _{1 to} 22 a _12, and a first projection lens 23. It is also called an optical system. Hereinafter, when the first light sources 22a _{1 to} 22a ₁₂ are not particularly distinguished, they are referred to as first light sources 22a.

  The 1st separator 21, the 1st light source 22a, and the 1st projection lens 23 are arrange | positioned on 1st optical axis AX1 extended in a vehicle front-back direction. The optical axis of the first projection lens 23 coincides with the first optical axis AX1.

  FIG. 6 is a front view of the substrate K1 on which the first light source 22a is mounted. FIG. 7 is a diagram for explaining the positional relationship between the first projection lens 23 and the first light source 22a.

The first light source 22a is a semiconductor light emitting device such as an LED or LD having a rectangular (for example, 1 mm square) light emitting surface, and as shown in FIG. 6, the substrate K1 with the light emitting surface facing forward (front). To be implemented. The first light sources 22a _{1 to} 22a ₁₂ are arranged on a plane orthogonal to the first optical axis AX1 at intervals of a predetermined pitch pt1 (for example, p1 = 2 mm) in a line in the horizontal direction (interval between the centers of the light emitting surfaces). Be placed.

  The first light source 22a is arranged asymmetrically with respect to the first optical axis AX1, as shown in FIG. 7, in order to irradiate a wide area in front of the host vehicle (for example, the left side in front of the host vehicle). For example, the first light source 22a is arranged in a state where the horizontal center C of the first light source 22a is shifted to the right by a predetermined distance L1 (for example, the predetermined distance L1 = 5 mm) with respect to the first optical axis AX1.

  Thus, since the first light source 22a is arranged in a state shifted by a predetermined distance L1 to the right side with respect to the first optical axis AX1, a wide range (for example, 0 ° to 20 °) on the left side in front of the host vehicle. Range) can be irradiated (see graph G1 in FIG. 3).

However, the light from the first light source 22a captured by the first projection lens 23 is a first light source 22a (for example, the first light source 22a ₈ ) disposed near the center (focal point) of the first projection lens 23. FIG. Compared to the reference), the first light source 22a (for example, the first light source 22a _1, see FIG. 7) arranged far from the center (focus) of the first projection lens 23 is less, so as the left angle increases. The light intensity decreases (see graph G1 in FIG. 3).

As shown in FIG. 5, the first separator 21 is disposed in front of the first light source 22a (for example, 0.2 mm forward). The first separator 21 comprises respectively a cylindrical reflecting surface _21a 1 _{~21a 12} in place first light source _22a 1 _{~22a 12} (the light-emitting surface) is opposed (see Fig. 4). Hereinafter, when the cylindrical reflection surfaces 21a _{1 to} 21a ₁₂ are not particularly distinguished, they are described as the cylindrical reflection surfaces 21a.

  As shown in FIG. 5, the cylindrical reflection surface 21a has a cylindrical reflection surface in which the front end opening A1 is larger than the rear end opening A2 and becomes narrower in a cone shape (square pyramid shape) from the front end opening A1 toward the rear end opening A2. As shown in FIG. 4, the upper reflection surface 21aA, the lower reflection surface 21aB, the left reflection surface 21aC, and the right reflection surface 21aD.

  The rear end openings A2 of the cylindrical reflection surface 21a are arranged on a surface orthogonal to the first optical axis AX1 at a predetermined interval in the horizontal direction (for example, the same interval as the arrangement pitch pt1 of the first light sources 22a). .

The first separator 21 has a cylindrical reflection surface 21a _{1 to} 21a ₁₂ (rear end opening A2) and a first light source 22a _{1 to} 22a so that light from the first light source 22a passes through the corresponding cylindrical reflection surface 21a. ₁₂ are arranged in a state of facing each other.

As shown in FIGS. 4 and 5, the lower reflection surface 21aB of the cylindrical reflection surface 21a includes an extended reflection surface 21aB1 that extends forward from the upper reflection surface 21aA. As a result, the vertical length of the first irradiation region P _22a is h1 (see FIG. 2A).

  As shown in FIG. 1, the first projection lens 23 is, for example, a lens whose outer shape is rhombus (for example, width W1 = 40 mm, height H1 = 20 mm) when viewed from the front. The first projection lens 23 whose outer shape is rhombus in front view is configured by cutting the upper, lower, left, and right sides of a projection lens having a circular outer shape, for example. The first projection lens 23 may be a lens having a circular outer shape when viewed from the front, or may be a lens having another shape.

  The focal point of the first projection lens 23 is located on the first optical axis AX1 and in the vicinity of the front end opening of the first separator 21 (for example, in the vicinity of the fifth front end opening A1 from the left side toward the front of the host vehicle). .

In the first optical system 20 having the above configuration, when the first light sources 22a _{1 to} 22a ₁₂ are turned on, the direct light from the first light sources 22a _{1 to} 22a ₁₂ and the first separator 21 (cylindrical reflecting surfaces 21a _{1 to} 21a _{12 are} displayed. ) Is transmitted forward through the first projection lens 23 (see FIG. 5). At that time, the direct light from the first light sources 22a _{1 to} 22a ₁₂ and the reflected light from the first separator 21 cause the vicinity of the front end opening of the first separator 21 (the front end opening A1 of each of the cylindrical reflecting surfaces 21a _{1 to} 21a ₁₂ ). A light intensity distribution is formed. This luminous intensity distribution is inverted and projected forward by the first projection lens 23.

Thereby, as shown to Fig.2 (a), 1st irradiation area _| region _{P22a1- P22a12 arrange |} positioned in a line in the horizontal direction in the high beam area _| region is formed. The first irradiation regions P _{22a1 to} P _22a12 include turning on / off individually (including lighting in a dimmed state) in accordance with turning on / off (including lighting in a dimmed state) of the first light sources 22a _{1 to} 22a _12. )

Next, a configuration example of the second optical system 30 that forms the second light distribution pattern P2 (second irradiation regions P _{32a1 to} P _32a12 ) will be described.

[Second optical system 30]
FIG. 8 is a perspective view of the second optical system 30 (the second light source 32a is omitted), and FIG. 9 is a side view (except for the main optical surface).

As shown in FIGS. 8 and 9, the second optical system 30 includes a second projection 31, a plurality of second light sources 32 a _{1 to} 32 a _12, and a second projection lens 33. It is also called an optical system. Hereinafter, when the second light sources 32a _{1 to} 32a ₁₂ are not particularly distinguished, they are referred to as second light sources 32a.

  The optical axis of the second optical system 30 (hereinafter referred to as the second optical axis AX2) is inclined to the left by a predetermined angle θ (for example, θ = 4 °) with respect to a reference axis AX0 extending in the vehicle front-rear direction (see FIG. 11). The second separator 31, the second light source 32a, and the second projection lens 33 are disposed on the second optical axis AX2. The optical axis of the second projection lens 33 coincides with the second optical axis AX2.

  FIG. 10 is a front view of the substrate K2 on which the second light source 32a is mounted. FIG. 11 is a diagram for explaining the positional relationship between the second projection lens 33 and the second light source 32.

The second light source 32a is a semiconductor light emitting element such as an LED or LD having a rectangular (for example, 1 mm square) light emitting surface, and as shown in FIG. 10, the substrate K2 with the light emitting surface facing forward (front). To be implemented. The second light sources 32a _{1 to} 32a ₁₂ are arranged on a plane perpendicular to the second optical axis AX2 at a predetermined pitch pt2 (for example, p2 = 2 mm) in a line in the horizontal direction (a distance between the center of the light emitting surface). Be placed.

  Since the second light source 32a takes in more light from the second light source 32a by the second projection lens 33, as shown in FIG. 11, the second light source 32a is arranged in a state shifted to the left as compared with the first light source 22a. For example, the second light source 32a is disposed symmetrically with respect to the second optical axis AX2.

  Thus, since the 2nd light source 32a is arrange | positioned in the state shifted to the left side with respect to the 1st light source 22a, more light from the 2nd light source 32a can be taken in by the 2nd projection lens 33. FIG.

As shown in FIG. 9, the second separator 31 is disposed in front of the second light source 32a (for example, 0.2 mm forward). The second separator 31 includes cylindrical reflecting surfaces 31a _{1 to} 31a ₁₂ at locations where the second light sources 32a _{1 to} 32a ₁₂ (light emitting surfaces) face each other (see FIG. 8). Hereinafter, when the cylindrical reflection surfaces 31a _{1 to} 31a ₁₂ are not particularly distinguished, they are referred to as a cylindrical reflection surface 31a.

  As shown in FIG. 9, the cylindrical reflection surface 31a has a cylindrical reflection surface in which the front end opening B1 is larger than the rear end opening B2 and becomes narrower in a cone shape (square pyramid shape) from the front end opening B1 toward the rear end opening B2. As shown in FIG. 8, the upper reflection surface 31aA, the lower reflection surface 31aB, the left reflection surface 31aC, and the right reflection surface 31aD.

  The rear end openings B2 of the cylindrical reflection surface 31a are arranged on a surface orthogonal to the second optical axis AX2 at a predetermined interval in the horizontal direction (for example, the same interval as the arrangement pitch pt2 of the second light sources 32a). .

The second separator 31 has cylindrical reflection surfaces 31a _{1 to} 31a ₁₂ (rear end opening B2) and second light sources 32a _{1 to} 32a so that the light from the second light source 32a passes through the corresponding cylindrical reflection surface 31a. ₁₂ are arranged in a state of facing each other.

As shown in FIG. 9, the lower reflection surface 31 a </ i> B of the cylindrical reflection surface 21 a is configured to have substantially the same length as the upper reflection surface 31 a </ b> A, and does not include the extended reflection surface unlike the first separator 21. As a result, the length of the second irradiation region P _{32a in} the vertical direction is h2 (h2 <h1) (see FIG. 2B).

  As shown in FIG. 1, the second projection lens 33 is, for example, a lens whose outer shape is rhombus (for example, width W2 = 40 mm, height H2 = 20 mm) when viewed from the front. The second projection lens 33 having a rhombus outer shape when viewed from the front is configured, for example, by cutting the top, bottom, left, and right of a projection lens having a circular outer shape. The second projection lens 33 may be a lens having a circular outer shape when viewed from the front, or may be a lens having another shape.

  The focal point of the second projection lens 33 is on the second optical axis AX2 and in the vicinity of the front end opening of the second separator 31 (for example, the sixth front end opening B1 and the seventh front end opening B1 from the left side toward the front of the vehicle). In the vicinity).

In the second optical system 30 configured as described above, when the second light sources 32a _{1 to} 32a ₁₂ are turned on, direct light from the second light sources 32a _{1 to} 32a ₁₂ and the second separator 31 (cylindrical reflecting surfaces 31a _{1 to} 31a _{12 are obtained.} ) Is transmitted forward through the second projection lens 33 (see FIG. 9). At that time, the direct light from the second light sources 32a _{1 to} 32a ₁₂ and the reflected light from the second separator 31 cause the vicinity of the front end opening of the second separator 31 (front end opening B1 of each of the cylindrical reflecting surfaces 31a _{1 to} 31a ₁₂ ). A light intensity distribution is formed. This luminous intensity distribution is inverted and projected forward by the second projection lens 33.

As a result, as shown in FIG. 2B, second irradiation regions P _{32a1 to} P _32a12 arranged in a row in the horizontal direction in the high beam region are formed. The second irradiation areas P _{32a1 to} P _32a12 include turning on / off individually (including lighting in a dimmed state) according to turning on / off (including lighting in a dimmed state) of the second light sources 32a _{1 to} 32a _12. )

As shown by the graph G2 in FIG. 3, the second light distribution pattern P2 (second irradiation region _P 32a1 _{~P 32a12)} is highest intensity a2 of the vertical line _{V 4} on the vicinity through the left angle 4 °, vertical It has a light intensity distribution that is symmetrical with respect to the vertical line V ₄ , with the light intensity decreasing from the line V ₄ toward the left and right sides.

The intensity a2 of the vertical line V ₄ on the vicinity through the left angle 4 ° is the highest, the predetermined angle theta (here, to the left with respect to the reference axis AX0 of the second optical axis AX2 extending in longitudinal direction of the vehicle, theta = 4 °) because it is inclined (see FIG. 11).

  Next, the effect of the vehicular lamp 10 having the above configuration will be described in comparison with the vehicular lamp 10A of the comparative example.

  FIG. 12 is a schematic view of a second optical system 30A constituting the vehicular lamp 10A of the comparative example. FIG. 13 is an example of the luminous intensity distribution of each light distribution pattern formed by the vehicular lamp 10A of the comparative example.

  Compared with the vehicle lamp 10, the vehicle lamp 10A of the comparative example has an optical axis of the second optical system 30A (hereinafter referred to as a second optical axis AX2A) extending in the vehicle front-rear direction, as shown in FIG. The point that coincides with the reference axis AX0 and the second light source 32a is such that the horizontal center C of the second light source 32a is on the right side of the second optical axis AX2A by a predetermined distance L2A (for example, a predetermined distance L2A = 6 mm). ) The difference is that they are arranged in a shifted state. Other than that, the configuration is the same as that of the vehicular lamp 10.

In FIG. 13, an example of the horizontal light intensity distribution of the first light distribution pattern P1 (first irradiation regions P _{22a1 to} P _22a12 ) formed by the first optical system 20 of the comparative example is shown by a graph G4. . Graph G4 represents a first light source _22a 1 _{~22a 12} each full power (e.g., at a duty ratio of 100% of the PWM signal) intensity distribution when illuminated.

As shown by a graph G4 in FIG. 13, the first light distribution pattern P1 (first irradiation regions P _{22a1 to} P _22a12 ) formed by the first optical system 20 of the comparative example has a luminous intensity a1 in the vicinity of the vertical line V. Has a luminous intensity distribution that is asymmetrical with respect to the vertical line V. The luminous intensity decreases from the vertical line V toward the left and right sides.

Also, in FIG. 13, an example of the horizontal light intensity distribution of the second light distribution pattern P2A (second irradiation regions P _{32a1 to} P _32a12 ) formed by the second optical system 30A of the comparative example is shown by a graph G5. ing. The graph G5 represents the light intensity distribution when the second light sources 32a _{1 to} 32a ₁₂ are each turned on with full power (for example, with a PWM signal having a duty ratio of 100%).

As shown by a graph G5 in FIG. 13, the second light distribution pattern P2A (second irradiation regions P _{32a1 to} P _32a12 ) formed by the second optical system 30A of the comparative example has a luminous intensity a1 in the vicinity of the vertical line V. Has a luminous intensity distribution that is asymmetrical with respect to the vertical line V. The luminous intensity decreases from the vertical line V toward the left and right sides.

  As described above, the horizontal luminous intensity position of the second light distribution pattern P2A formed by the second optical system 30A of the comparative example is the same as that of the first light distribution pattern P1 formed by the first optical system 20 of the comparative example. It coincides (or substantially coincides) with the peak light intensity position p1 in the horizontal direction.

  Further, in FIG. 13, an example of the light intensity distribution in the horizontal direction of the combined light distribution pattern PA is shown by a graph G6.

  As shown by a graph G6 in FIG. 13, the combined light distribution pattern PA has a light intensity distribution in which the light intensity decreases as the left angle increases from 0 °.

  FIG. 14 is a graph in which the graph G3 in FIG. 3 and the graph G6 in FIG. 13 are overlapped for comparison.

  Referring to FIG. 14, the synthetic light distribution pattern PA (see graph G6 in FIG. 14) formed by the vehicle lamp 10A of the comparative example has a luminous intensity as the left angle increases between 0 ° and 5 ° to the left. In contrast, the combined light distribution pattern P (see graph G3 in FIG. 14) formed by the vehicular lamp 10 of the above embodiment has a light intensity between 0 ° and 5 ° left substantially constant. It turns out that it becomes.

  Further, the synthetic light distribution pattern PA (see graph G6 in FIG. 14) formed by the vehicle lamp 10A of the comparative example decreases in luminous intensity as the left angle increases from 5 ° to the left. The composite light distribution pattern P (see graph G3 in FIG. 14) formed by the vehicular lamp 10 of the form is a composite light distribution pattern PA (see graph G6 in FIG. 14) as the left angle increases from 5 ° to the left. It can be seen that the light intensity decreases more slowly. That is, compared with the synthetic light distribution pattern PA (see graph G6 in FIG. 14) formed by the vehicle lamp 10A of the comparative example, the synthetic light distribution pattern P (FIG. 14) formed by the vehicle lamp 10 of the above embodiment. It can be seen that the light intensity at an angle of 5 ° or more on the left is higher in the graph G3 in the middle).

  As described above, according to the present embodiment, the light intensity between 0 ° and 5 ° to the left is substantially constant light intensity a3, and the light intensity gradually decreases as the left angle increases from that (left 5 °) (that is, Therefore, the visibility at the time of the electronic swivel can be improved.

  As described above, according to the present embodiment, during the electronic swivel, the horizontal peak luminous intensity of the plurality of irradiation areas formed when the light source disposed far from the center of the projection lens is lit relatively brightly. However, it is possible to suppress a decrease compared to the peak intensity in the horizontal direction of a plurality of irradiation areas formed when a light source arranged near the center of the projection lens is turned on relatively brightly. As a result, it is possible to realize light distribution (ADB light distribution) with high peak luminance in the horizontal direction and excellent visibility when electronic swiveling.

This is because the horizontal light intensity position p2 (see FIG. 3) of the second light distribution pattern P2 (second irradiation regions P _{32a1 to} P _32a12 ) is the first light distribution pattern P1 (first irradiation regions P _{22a1 to} P _{22a1 to} P _22a12 ) is shifted in the horizontal direction (left side in FIG. 3) with respect to the horizontal peak luminous intensity position p1 (see FIG. 3).

That is, the horizontal light intensity position p2 (see FIG. 3) of the second light distribution pattern P2 (second irradiation regions P _{32a1 to} P _32a12 ) is the first light distribution pattern P1 (first irradiation regions P _{22a1 to} P _22a12). ) In the horizontal direction (left side in FIG. 3) with respect to the horizontal peak luminous intensity position p1 (see FIG. 3), the combined light distribution pattern P ( The graph G3 in FIG. 14) is due to the light intensity gradually decreasing from the combined light distribution pattern PA (see graph G6 in FIG. 14) as the left angle increases from 5 ° to the left. That is, compared with the synthetic light distribution pattern PA (see graph G6 in FIG. 14) formed by the vehicle lamp 10A of the comparative example, the synthetic light distribution pattern P (FIG. 14) formed by the vehicle lamp 10 of the above embodiment. This is because the light intensity at the angle of 5 ° or more on the left is higher in the graph G3).

  Next, a modified example will be described.

In the above embodiment, the horizontal peak luminous intensity position p2 (see FIG. 3) of the second irradiation areas P _{32a1 to} P _{32a12 is} the horizontal peak luminous intensity position p1 (see FIG. 3) of the first irradiation areas P _{22a1 to} P _22a12 . The second optical system 30 is inclined to the left by a predetermined angle θ (for example, θ = 4 °) with respect to the reference axis AX0 extending in the vehicle front-rear direction so as to be shifted in the horizontal direction (left side in FIG. 3) with respect to Although the example arrange | positioned in the state (refer FIG. 11) was demonstrated, it is not restricted to this.

For example, the horizontal peak luminous intensity position p2 (see FIG. 3) of the second irradiation areas P _{32a1 to} P _32a12 is _{relative to} the horizontal peak luminous intensity position p1 (see FIG. 3) of the first irradiation areas P _{22a1 to} P _22a12 . Even if only the optical axis of the second projection lens 33 is inclined by a predetermined angle θ (for example, θ = 4 °) with respect to the reference axis AX0 extending in the vehicle front-rear direction so as to be shifted in the horizontal direction (left side in FIG. 3). Good. For example, the surface shape of the back surface of the second projection lens 33 is designed so that the optical axis of the second projection lens 33 is inclined at a predetermined angle θ (for example, θ = 4 °) with respect to the reference axis AX0 (asymmetrical). It can be realized by designing as a surface of

In addition, for example, the horizontal peak luminous intensity position p2 (see FIG. 3) of the second irradiation areas P _{32a1 to} P _32a12 is _{relative to} the horizontal peak luminous intensity position p1 (see FIG. 3) of the first irradiation areas P _{22a1 to} P _22a12 . Thus, only the second light source 32a (substrate K2) and the second separator 31 may be arranged in a state rotated by a predetermined angle with respect to the focal point of the second projection lens 33 so as to be shifted in the horizontal direction (left side in FIG. 3). Good.

In the above embodiment, the example in which the length h1 in the vertical direction of the first irradiation region P _22a is longer than the length h2 in the vertical direction of the second irradiation region P _32a has been described. For example, the vertical length h1 of the first irradiation region P _22a may be the same as the vertical length h2 of the second irradiation region P _32a .

  Moreover, although the said embodiment demonstrated the example using the 1st separator 21 and the 2nd separator 31, it is not restricted to this. For example, at least one of the first separator 21 and the second separator 31 may be omitted.

  Each numerical value shown in each of the above embodiments is an exemplification, and it goes without saying that an appropriate numerical value different from this can be used.

  The above embodiments are merely examples in all respects. The present invention is not construed as being limited by the description of the above embodiments. The present invention can be implemented in various other forms without departing from the spirit or main features thereof.

  DESCRIPTION OF SYMBOLS 10 ... Vehicle lamp, 20 ... 1st optical system, 21 ... 1st separator, 21a ... Cylindrical reflective surface, 21a1 ... Cylindrical reflective surface, 21aA ... Upper reflective surface, 21aB ... Lower reflective surface, 21aB1 ... Extended reflective surface 21aC ... Left reflective surface, 21aD ... Right reflective surface, 22 ... First light source, 22a ... First light source, 22a1 ... First light source, 22a8 ... First light source, 23 ... First projection lens, 30 ... Second optical system 30A ... second optical system, 31 ... second separator, 31a ... cylindrical reflecting surface, 31a1 ... cylindrical reflecting surface, 31aA ... upper reflecting surface, 31aB ... lower reflecting surface, 31aC ... left reflecting surface, 31aD ... right reflecting Surface, 32 ... second light source, 33 ... second projection lens, K1, K2 ... substrate

Claims (6)

A first projection lens and light that forms a plurality of first irradiation regions that pass through the first projection lens and are irradiated forward and arranged in at least one row in the horizontal direction in the high beam region and individually turned on and off are emitted. A first optical system comprising a plurality of first light sources;
A plurality of second projection lenses and a plurality of second irradiation regions that are irradiated forward and transmitted through the second projection lens and arranged in at least one row in the horizontal direction in the high beam region and individually turned on and off. A second optical system comprising: a plurality of second light sources that emit light formed in a form that overlaps the region;
The vehicular lamp in which the horizontal peak luminous intensity positions of the plurality of second irradiation areas are shifted in the horizontal direction with respect to the horizontal peak luminous intensity positions of the plurality of first irradiation areas.   The second optical system is arranged in the vehicle front-rear direction so that horizontal peak luminous intensity positions of the plurality of second irradiation areas are shifted in a horizontal direction with respect to horizontal peak luminous intensity positions of the plurality of first irradiation areas. The vehicular lamp according to claim 1, wherein the vehicular lamp is arranged in a state inclined at a predetermined angle with respect to an extending reference axis. The optical axis of the second projection lens is a vehicle so that the horizontal peak luminous intensity positions of the plurality of second irradiation areas are shifted in the horizontal direction with respect to the horizontal peak luminous intensity positions of the plurality of first irradiation areas. It is inclined at a predetermined angle with respect to a reference axis extending in the front-rear direction,
2. The vehicular lamp according to claim 1, wherein a surface shape of the back surface of the second projection lens is designed such that an optical axis of the second projection lens is inclined at a predetermined angle with respect to the reference axis.   The plurality of second light sources includes the second light source such that the horizontal peak light intensity positions of the plurality of second irradiation areas are shifted in the horizontal direction with respect to the horizontal peak light intensity positions of the plurality of first irradiation areas. The vehicular lamp according to claim 1, wherein the vehicular lamp is arranged in a state rotated by a predetermined angle with respect to a focal point of the projection lens. The vertical length of the first irradiation region is longer than the vertical length of the second irradiation region,
The said 1st irradiation area | region and the said 2nd irradiation area | region are overlapped in any one of Claim 1 to 4 in the state which the upper part of the said 1st irradiation area | region protruded upwards from the upper edge of the said 2nd irradiation area | region. The vehicle lamp as described. The first optical system includes a first separator provided with the plurality of first light sources facing each other between the plurality of first light sources and the first projection lens,
The first separator includes a plurality of cylindrical reflecting surfaces whose front end opening is larger than the rear end opening and narrows in a cone shape as it goes from the front end opening toward the rear end opening,
In the first separator, rear end openings of the plurality of cylindrical reflection surfaces are opposed to the plurality of first light sources so that light from the plurality of first light sources passes through the corresponding cylindrical reflection surfaces. Arranged in a state,
The plurality of cylindrical reflection surfaces include at least an upper reflection surface and a lower reflection surface,
The vehicular lamp according to claim 5, wherein the lower reflection surface includes an extended reflection surface that extends forward from the upper reflection surface.

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