JP7034790B2 - Vehicle lighting - Google Patents

Description

The present invention relates to a vehicle lamp, and in particular, the horizontal peak luminous intensity of a plurality of irradiation regions formed when a light source arranged 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 vehicle lamp that can suppress a decrease in the horizontal peak luminous intensity of a plurality of irradiation regions formed when a light source arranged close to the light source is lit relatively brightly.

Conventionally, a projection lens and a plurality of light sources that emit light that forms a plurality of irradiation regions that are transmitted forward through the projection lens and are arranged in a horizontal row in a high beam region and are individually turned on and off. A variable light distribution type vehicle lighting device (ADB: Adaptive Driving Beam) is known (see, for example, Patent Document 1 (FIG. 4, etc.)).

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

Japanese Unexamined Patent Publication No. 2017-212170

However, as examined by the present inventors, in the above-mentioned variable light distribution type vehicle lamp, a plurality of irradiation regions formed when a light source arranged far from the center of the projection lens is lit relatively brightly. It was found that the horizontal peak luminous intensity of is lower than the horizontal peak luminous intensity of multiple irradiation regions formed when a light source arranged near the center of the projection lens is lit relatively brightly. ..

The present invention has been made in view of the above circumstances, and the horizontal peak luminosity of a plurality of irradiation regions formed when a light source arranged far from the center of the projection lens is lit relatively brightly is determined. Provided is a vehicle lighting device that can suppress a decrease in the horizontal peak luminous intensity of a plurality of irradiation regions formed when a light source arranged near the center of the projection lens is lit relatively brightly. The purpose is to do.

In order to achieve the above object, one aspect of the present invention is an individual point arranged in at least one row horizontally in the high beam region, transmitted forward through the first projection lens and the first projection lens. A first optical system including a plurality of first light sources that emit light forming a plurality of first irradiation regions to be extinguished, a second projection lens, and a second projection lens are transmitted and irradiated forward. A plurality of second light sources that emit light, which are arranged in at least one row in a horizontal direction in the high beam region and form a plurality of second irradiation regions that are individually turned on and off so as to overlap the plurality of first irradiation regions. A vehicle provided with a second optical system and a vehicle in which the horizontal peak luminous intensity positions of the plurality of second irradiation regions are laterally displaced with respect to the horizontal peak luminous intensity positions of the plurality of first irradiation regions. It is characterized by being a lighting tool.

According to this aspect, the horizontal peak luminosity of multiple irradiation regions formed when a light source located far from the center of the projection lens is lit relatively brightly is arranged near the center of the projection lens. Compared with the horizontal peak luminous intensity of a plurality of irradiation regions formed when the light source is relatively brightly lit, it is possible to suppress the decrease.

This is because the horizontal peak luminous intensity positions of the plurality of second irradiation regions are laterally displaced with respect to the horizontal peak luminous intensity positions of the plurality of first irradiation regions.

Further, in the above invention, the preferred embodiment is such that the horizontal peak luminosity position of the plurality of second irradiation regions is laterally displaced with respect to the horizontal peak luminosity position of the plurality of first irradiation regions. The second optical system is characterized in that it is arranged in a state of being inclined by a predetermined angle with respect to a reference axis extending in the front-rear direction of the vehicle.

Further, in the above invention, the preferred embodiment is such that the horizontal peak luminosity position of the plurality of second irradiation regions is laterally displaced with respect to the horizontal peak luminosity position of the plurality of first irradiation regions. The optical axis of the second projection lens is tilted by a predetermined angle with respect to the reference axis extending in the front-rear direction of the vehicle, 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 characterized in that it is designed to be tilted by a predetermined angle with respect to a predetermined angle.

Further, in the above invention, the preferred embodiment is such that the horizontal peak luminous intensity positions of the plurality of second irradiation regions are laterally displaced with respect to the horizontal peak luminous intensity positions of the plurality of first irradiation regions. The plurality of second light sources are characterized in that they are arranged in a state of being rotated by a predetermined angle with respect to the focal point of the second projection lens.

Further, in the above invention, in a preferred embodiment, the length of the first irradiation region in the vertical direction is longer than the length of the second irradiation region in the vertical direction, and the first irradiation region and the second irradiation region are described above. It is characterized in that the upper part of the first irradiation region is superimposed in a state of protruding upward from the upper edge of the second irradiation region.

Further, in the above invention, a preferred embodiment is that the first optical system is 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 comprises a plurality of tubular reflective surfaces in which the front end opening is larger than the rear end opening and narrows in a pyramidal shape from the front end opening toward the rear end opening, and the first separator comprises the plurality. The rear end openings of the plurality of tubular reflection surfaces and the plurality of first light sources are arranged in a state of facing each other so that the light from the first light source passes through the corresponding tubular reflection surface, and the plurality of said ones. The tubular reflecting surface includes at least an upper reflecting surface and a lower reflecting surface, and the lower reflecting surface includes an extended reflecting surface extending forward from the upper reflecting surface.

It is a schematic front view of a vehicle lamp 10. (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, (c) Synthetic light distribution pattern P. This is an example. This is an example of the luminous intensity distribution of each light distribution pattern. It is a perspective view of the 1st optical system 20 (the 1st light source 22a is omitted). It is a side view of the 1st optical system 20 (the other than the main optical surface is omitted). It is a front view of the substrate K1 on which the 1st light source 22a is mounted. It is a figure for demonstrating the positional relationship between the 1st projection lens 23 and the 1st light source 22a. It is a perspective view of the 2nd optical system 30 (the 2nd light source 32a is omitted). It is a side view of the 2nd optical system 30 (the other than the main optical surface is omitted). It is a front view of the substrate K2 on which the 2nd light source 32a is mounted. It is a figure for demonstrating the positional relationship between the 2nd projection lens 33 and the 2nd light source 32. It is a schematic diagram of the 2nd optical system 30A constituting the vehicle lamp 10A of the comparative example. It is an example of the luminous intensity distribution of each light distribution pattern formed by the vehicle lamp 10A of the comparative example. It is a graph drawn by superimposing the graph G3 in FIG. 3 and the graph G6 in FIG.

Hereinafter, the vehicle lamp 10 according to the embodiment of the present invention will be described with reference to the accompanying drawings. The corresponding components in each figure are designated by the same reference numerals, and duplicate explanations are omitted.

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

The vehicle lighting fixture 10 shown in FIG. 1 is a variable light distribution type vehicle headlight (ADB: Adaptive Driving Beam), and is mounted on both left and right sides of a front end portion of a vehicle such as an automobile, for example. Hereinafter, the vehicle on which the vehicle lamp 10 is mounted is referred to as an own vehicle (not shown). Since the vehicle lighting fixtures 10 mounted on both the left and right sides have a symmetrical configuration, the vehicle lighting fixtures 10 mounted on the left side of the front end portion of the own vehicle (the left side when facing the front of the own vehicle) are represented below. explain. Although not shown, the vehicle lighting fixture 10 is arranged in a lighting chamber composed of an outer lens and a housing, and is attached to the housing or the like.

As shown in FIG. 1, the vehicle lamp 10 includes a first optical system 20 arranged on the left side in a front view and a second optical system 30 arranged on the right side.

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

As shown in FIG. 2A, the first light distribution pattern P1 includes the first irradiation regions P _22a1 to P _22a12 arranged in a horizontal row in the high beam region. The first irradiation areas P _22a1 to P _22a12 are individually turned off (lighted in a dimmed state) according to the point extinguished (including lighting in a dimmed state) of the first light sources 22a ₁ to 22a ₁₂ described later. Including). Hereinafter, when the first irradiation region P _22a1 to P _22a12 is not particularly distinguished, it is described as the first irradiation region P _22a . The length of the first irradiation region P _22a in the vertical direction is h1.

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

In FIG. 3, an example of the horizontal luminous intensity distribution of the first light distribution pattern P1 (first irradiation region P _22a1 to P _22a12 ) is shown by the graph G1. The graph G1 represents the luminosity distribution when the first light sources 22a ₁ to 22a ₁₂ , which will be 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 G1 in FIG. 3, the first light distribution pattern P1 (first irradiation region 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 both left and right sides. It has a luminous intensity distribution that is asymmetrical with respect to the vertical line V, in which the luminous intensity decreases accordingly.

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

As shown in FIG. 2B, the second light distribution pattern P2 includes the second irradiation regions P _32a1 to P _32a12 arranged in a horizontal row in the high beam region. The second irradiation areas P _32a1 to P _32a12 are individually turned off (lighted in a dimmed state) according to the point extinguished (including lighting in a dimmed state) of the second light sources 32a ₁ to 32a ₁₂ described later. Including). Hereinafter, when the second irradiation region P _32a1 to P _32a12 is not particularly distinguished, it is described as the second irradiation region P _32a . The length of the second irradiation region P _32a in the vertical direction is h2 (h2 <h1).

In FIG. 3, an example of the horizontal luminous intensity distribution of the second light distribution pattern P2 (second irradiation region P _32a1 to P _32a12 ) is shown by the graph G2. The graph G2 shows the luminosity distribution when the second light sources 32a ₁ to 32a ₁₂ , which will be 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 to P _32a12 ) has the highest luminous intensity a2 in the vicinity of the vertical line V4 passing through the left angle of ₄ ° and is vertical. It has a luminous intensity distribution symmetrical with respect to the vertical line _V4 , in which the luminous intensity decreases from the line _V4 toward both the left and right sides.

As described above, the horizontal peak luminous intensity position p2 of the second light distribution pattern P2 (second irradiation region P _32a1 to P _32a12 ) is that of the first light distribution pattern P1 (first irradiation region P _22a1 to P _22a12 ). It is displaced in the horizontal direction (left side in FIG. 3) with respect to the peak luminous intensity position p1 in the horizontal direction.

The first irradiation regions P _22a1 to P _22a12 shown in FIG. 2A and the second irradiation regions P _32a1 to P _32a12 shown in FIG. 2B are superimposed to form a synthetic arrangement shown in FIG. 2C. The light pattern P is formed. As shown in FIG. 2 (c), in the first irradiation region P _22a1 to P _22a12 and the second irradiation region P _32a1 to P _32a12 , the upper part of the first irradiation region P _22a1 to P _22a12 is the second irradiation region P _32a1 to. It is superimposed in a state of protruding upward from the upper edge of P _{32a 12} .

FIG. 3 shows an example of the horizontal luminous intensity distribution of the synthetic light distribution pattern P by the graph G3.

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

Next, a configuration example of the first optical system 20 that forms the first light distribution pattern P1 (first irradiation region P _22a1 to P _22a12 ) will be described.

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

As shown in FIGS. 4 and 5, the first optical system 20 is a direct projection type (direct projection type) including a first separator 21, a plurality of first light sources 22a ₁ to 22a ₁₂ , and a first projection lens 23. It is also called an optical system. Hereinafter, when the first light source 22a ₁ to 22a ₁₂ is not particularly distinguished, it is described as the first light source 22a.

The first separator 21, the first light source 22a, and the first projection lens 23 are arranged on the first optical axis AX1 extending in the front-rear direction of the vehicle. 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 element 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 has the light emitting surface facing forward (front). Is implemented in. The first light sources 22a ₁ to 22a ₁₂ are arranged in a horizontal row at a predetermined pitch pt1 (for example, p1 = 2 mm) on a plane orthogonal to the first optical axis AX1 at a spacing (distance between the centers of the light emitting surfaces). Be placed.

As shown in FIG. 7, the first light source 22a is arranged asymmetrically with respect to the first optical axis AX1 in order to irradiate a wide area on the side in front of the vehicle (for example, on the left side in front of the 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 side by a predetermined distance L1 (for example, a predetermined distance L1 = 5 mm) with respect to the first optical axis AX1.

In this way, since the first light source 22a is arranged in a state of being shifted by a predetermined distance L1 to the right side with respect to the first optical axis AX1, it covers a wide range (for example, 0 ° to 20 °) on the left side in front of the 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 the first light source 22a (for example, the first light source 22a ₈ ) arranged near the center (focus) of the first projection lens 23. The number of the first light source 22a (for example, the first light source 22a _1. see FIG. 7) located far from the center (focal point) of the first projection lens 23 is smaller than that of the first light source 22a (see FIG. 7). The luminosity decreases (see graph G1 in FIG. 3).

As shown in FIG. 5, the first separator 21 is arranged in front of the first light source 22a (for example, 0.2 mm in front). The first separator 21 is provided with cylindrical reflection surfaces 21a ₁ to 21a ₁₂ at locations facing the first light sources 22a ₁ to 22a ₁₂ (light emitting surfaces) (see FIG. 4). Hereinafter, when the tubular reflecting surfaces 21a ₁ to 21a ₁₂ are not particularly distinguished, they are referred to as a tubular reflecting surface 21a.

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

The rear end openings A2 of the tubular reflecting surface 21a are arranged in a horizontal row at predetermined intervals (for example, the same intervals as the arrangement pitch pt1 of the first light source 22a) on a plane orthogonal to the first optical axis AX1. ..

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 the light from the first light source 22a passes through the corresponding tubular reflection surface 21a. The _12s are arranged so as to face each other.

As shown in FIGS. 4 and 5, the lower reflecting surface 21aB of the tubular reflecting surface 21a includes an extended reflecting surface 21aB1 extending forward from the upper reflecting surface 21aA. As a result, the length of the first irradiation region P _22a in the vertical direction becomes h1 (see FIG. 2A).

As shown in FIG. 1, the first projection lens 23 is, for example, a lens having a rhombic outer shape (for example, width W1 = 40 mm, height H1 = 20 mm) in front view. The first projection lens 23 having a diamond-shaped outer shape when viewed from the front is configured by, for example, cutting the top, bottom, left, and right of a projection lens having a circular outer shape. The first projection lens 23 may be a lens having a circular outer shape in front view, 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 near the front end opening of the first separator 21 (for example, near the fifth front end opening A1 from the left side when facing the front of the 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 turned on. ), The reflected light passes through the first projection lens 23 and is irradiated forward (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 bring it into the vicinity of the front end opening of the first separator 21 (the front end openings A1 of each of the tubular reflecting surfaces 21a ₁ to 21a ₁₂ ). A luminosity distribution is formed. This luminous intensity distribution is inverted and projected forward by the first projection lens 23.

As a result, as shown in FIG. 2A, the first irradiation regions P _22a1 to P _22a12 arranged in a horizontal row in the high beam region are formed. The first irradiation areas P _22a1 to P _22a12 are individually turned off (including lighting in a dimmed state) according to the point extinguishing (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 region P _32a1 to P _32a12 ) will be described.

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

As shown in FIGS. 8 and 9, the second optical system 30 is a direct projection type (direct projection type) including a second separator 31, a plurality of second light sources 32a ₁ to 32a ₁₂ , and a second projection lens 33. It is also called an optical system. Hereinafter, when the second light source 32a ₁ to 32a ₁₂ is not particularly distinguished, it is described as the second light source 32a.

The optical axis of the second optical system 30 (hereinafter referred to as the second optical axis AX2) is tilted 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 (FIG. 11). The second separator 31, the second light source 32a, and the second projection lens 33 are arranged 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 has the light emitting surface facing forward (front). Is implemented in. The second light sources 32a ₁ to 32a ₁₂ are arranged in a horizontal row at a predetermined pitch pt2 (for example, p2 = 2 mm) on a plane orthogonal to the second optical axis AX2. Be placed.

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

In this way, since the second light source 32a is arranged in a state of being shifted to the left side with respect to the first light source 22a, more light from the second light source 32a can be taken in by the second projection lens 33.

As shown in FIG. 9, the second separator 31 is arranged in front of the second light source 32a (for example, 0.2 mm in front). The second separator 31 is provided with cylindrical reflection 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 tubular reflecting surfaces 31a ₁ to 31a ₁₂ are not particularly distinguished, they are referred to as a tubular reflecting surface 31a.

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

The rear end openings B2 of the tubular reflecting surface 31a are arranged in a horizontal row at predetermined intervals (for example, the same intervals as the arrangement pitch pt2 of the second light source 32a) on a plane orthogonal to the second optical axis AX2. ..

The second separator 31 has a cylindrical reflection surface 31a ₁ to 31a ₁₂ (rear end opening B2) and a second light source 32a ₁ to 32a so that the light from the second light source 32a passes through the corresponding tubular reflection surface 31a. The _12s are arranged so as to face each other.

As shown in FIG. 9, the lower reflecting surface 31aB of the tubular reflecting surface 21a is configured to have substantially the same length as the upper reflecting surface 31aA, and unlike the first separator 21, does not include an extended reflecting surface. 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 having a rhombic outer shape (for example, width W2 = 40 mm, height H2 = 20 mm) in front view. The second projection lens 33 having a diamond-shaped outer shape in front view is configured by, for example, cutting the upper, lower, left, and right sides of a projection lens having a circular outer shape. The second projection lens 33 may be a lens having a circular outer shape in front view, 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 near 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 when facing the front of the vehicle). It is located in the vicinity of the space).

In the second optical system 30 having the above configuration, when the second light sources 32a ₁ to 32a ₁₂ are turned on, the 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 turned on. ), The reflected light passes through the second projection lens 33 and is irradiated forward (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 bring it into the vicinity of the front end opening of the second separator 31 (the front end openings B1 of each of the tubular reflecting surfaces 31a ₁ to 31a ₁₂ ). A luminosity 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, the second irradiation regions P _32a1 to P _32a12 arranged in a horizontal row in the high beam region are formed. The second irradiation areas P _32a1 to P _32a12 are individually turned off (including lighting in a dimmed state) according to the point extinguishing (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 to P _32a12 ) has the highest luminous intensity a2 in the vicinity of the vertical line V4 passing through the left angle of ₄ ° and is vertical. It has a luminous intensity distribution symmetrical with respect to the vertical line _V4 , in which the luminous intensity decreases from the line _V4 toward both the left and right sides.

The luminous intensity a2 in the vicinity of the vertical straight line V4 passing through the left angle of ₄ ° is highest at a predetermined angle θ in the left direction with respect to the reference axis AX0 in which the second optical axis AX2 extends in the front-rear direction of the vehicle (here, θ). = 4 °) This is due to the inclination (see FIG. 11).

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

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

In the vehicle lighting tool 10A of the comparative example, as shown in FIG. 12, the optical axis of the second optical system 30A (hereinafter referred to as the second optical axis AX2A) extends in the vehicle front-rear direction as compared with the vehicle lighting tool 10. A point that coincides with the reference axis AX0, and the second light source 32a has a horizontal center C of the second light source 32a on the right side of the second optical axis AX2A at 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, it has the same configuration as the above-mentioned vehicle lamp 10.

FIG. 13 shows an example of the horizontal luminous intensity distribution of the first light distribution pattern P1 (first irradiation region P _22a1 to P _22a12 ) formed by the first optical system 20 of the comparative example by the graph G4. .. The graph G4 shows the luminosity distribution when the first light sources 22a ₁ to 22a ₁₂ are turned on at full power (for example, with a PWM signal having a duty ratio of 100%).

As shown by the graph G4 in FIG. 13, the first light distribution pattern P1 (first irradiation region P _22a1 to P _22a12 ) formed by the first optical system 20 of the comparative example has a luminous intensity a1 in the vicinity on the vertical line V. Has the highest luminous intensity and has a left-right asymmetric luminous intensity distribution with respect to the vertical line V, in which the luminous intensity decreases from the vertical line V toward both left and right sides.

Further, FIG. 13 shows an example of the horizontal luminous intensity distribution of the second light distribution pattern P2A (second irradiation region P _32a1 to P _32a12 ) formed by the second optical system 30A of the comparative example by the graph G5. ing. The graph G5 shows the luminosity distribution when the second light sources 32a ₁ to 32a ₁₂ are turned on at full power (for example, with a PWM signal having a duty ratio of 100%).

As shown by the graph G5 in FIG. 13, the second light distribution pattern P2A (second irradiation region 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 the highest luminous intensity and has a left-right asymmetric luminous intensity distribution with respect to the vertical line V, in which the luminous intensity decreases from the vertical line V toward both left and right sides.

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

Further, FIG. 13 shows an example of the horizontal luminous intensity distribution of the synthetic light distribution pattern PA by the graph G6.

As shown by the graph G6 in FIG. 13, the synthetic light distribution pattern PA has a luminous intensity distribution in which the luminous 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 superimposed 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. On the other hand, in the synthetic light distribution pattern P (see graph G3 in FIG. 14) formed by the vehicle lamp 10 of the above embodiment, the luminous intensity between 0 ° and the left 5 ° is substantially constant luminous intensity a3. It turns out that

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

As described above, according to the present embodiment, the luminous intensity between 0 ° and 5 ° to the left is a substantially constant luminous intensity a3, and the luminous intensity gradually decreases as the left angle increases from there (5 ° to the left) (that is,). , The luminous intensity increases at an angle of 5 ° or more to the left), so visibility during electronic swivel can be improved.

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

This is because the horizontal peak luminous intensity position p2 (see FIG. 3) of the second light distribution pattern P2 (second irradiation region P _32a1 to P _32a12 ) is the first light distribution pattern P1 (first irradiation region P _22a1 to P). This is due to the fact that the peak luminous intensity position p1 (see FIG. 3) in the horizontal direction of _22a12 ) is displaced in the horizontal direction (left side in FIG. 3).

That is, the horizontal peak luminous intensity position p2 (see FIG. 3) of the second light distribution pattern P2 (second irradiation region P _32a1 to P _32a12 ) is the first light distribution pattern P1 (first irradiation region 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 synthetic light distribution pattern P (formed by the vehicle lighting tool 10 of the above embodiment) is formed. This is because the luminous intensity of the graph G3 in FIG. 14) gradually decreases from the synthetic light distribution pattern PA (see the 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 formed by the vehicle lighting tool 10A of the comparative example (see graph G6 in FIG. 14), the synthetic light distribution pattern P formed by the vehicle lighting tool 10 of the above embodiment (FIG. 14). (Refer to the graph G3 in the middle) is due to the fact that the luminous intensity is higher at an angle of 5 ° or more to the left.

Next, a modification will be described.

In the above embodiment, the horizontal peak luminous intensity position p2 (see FIG. 3) of the second irradiation regions P _32a1 to P _32a12 is the horizontal peak luminous intensity position p1 of the first irradiation regions P _22a1 to P _22a12 (see FIG. 3). The second optical system 30 is tilted to the left by a predetermined angle θ (for example, θ = 4 °) with respect to the reference axis AX0 extending in the front-rear direction of the vehicle so as to be displaced in the horizontal direction (left side in FIG. 3). An example of the arrangement in the state (see FIG. 11) has been described, but the present invention is not limited to this.

For example, the horizontal peak luminosity position p2 (see FIG. 3) of the second irradiation regions P _32a1 to P _32a12 is relative to the horizontal peak luminosity position p1 (see FIG. 3) of the first irradiation regions P _22a1 to P _22a12 . Even if only the optical axis of the second projection lens 33 is tilted by a predetermined angle θ (for example, θ = 4 °) with respect to the reference axis AX0 extending in the front-rear direction of the vehicle so as to be displaced in the horizontal direction (left side in FIG. 3). good. This designs, for example, the surface shape of the back surface of the second projection lens 33 so that the optical axis of the second projection lens 33 is tilted by a predetermined angle θ (for example, θ = 4 °) with respect to the reference axis AX0 (asymmetry). It can be realized by (designing as a surface of).

Further, for example, the horizontal peak luminous intensity position p2 (see FIG. 3) of the second irradiation regions P _32a1 to P _32a12 is relative to the horizontal peak luminous intensity position p1 (see FIG. 3) of the first irradiation regions P _22a1 to P _22a12 . Even if only the second light source 32a (board K2) and the second separator 31 are arranged in a state of being rotated by a predetermined angle with respect to the focal point of the second projection lens 33 so as to be displaced in the horizontal direction (left side in FIG. 3). good.

Further, in the above embodiment, an example in which the vertical length h1 of the first irradiation region P _22a is longer than the vertical length h2 of the second irradiation region P _32a has been described, but the present invention is not limited to this. 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 .

Further, in the above embodiment, an example using the first separator 21 and the second separator 31 has been described, but the present invention is not limited to this. For example, at least one of the first separator 21 and the second separator 31 may be omitted.

All of the numerical values shown in the above embodiments are examples, and it goes without saying that appropriate numerical values different from these can be used.

Each of the above embodiments is merely an example in every respect. The present invention is not limitedly construed by the description of each of the above embodiments. The present invention can be practiced in various other forms without departing from its spirit or key features.

10 ... Vehicle lighting equipment, 20 ... First optical system, 21 ... First 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 reflective surface, 31a1 ... Cylindrical reflective surface, 31aA ... Upper reflective surface, 31aB ... Lower reflective surface, 31aC ... Left reflective surface, 31aD ... Right reflection Surface, 32 ... 2nd light source, 33 ... 2nd projection lens, K1, K2 ... Substrate

Claims (5)

It emits light that forms a first projection lens and a plurality of first irradiation regions that are transmitted forward through the first projection lens, are arranged in at least one row horizontally in the high beam region, and are individually turned on and off. A first optical system comprising a plurality of first light sources,
The second irradiation lens and the plurality of second irradiation regions that are transmitted forward through the second projection lens, are arranged in at least one row in the horizontal direction in the high beam region, and are individually turned on and off are subjected to the plurality of first irradiations. A second optical system comprising a plurality of second light sources that emit light formed in a form overlapping the regions.
The horizontal peak luminous intensity positions of the plurality of second irradiation regions are laterally displaced with respect to the horizontal peak luminous intensity positions of the plurality of first irradiation regions .
The optical axis of the second projection lens is such that the horizontal peak luminosity position of the plurality of second irradiation regions is horizontally displaced with respect to the horizontal peak luminosity position of the plurality of first irradiation regions. It is tilted by a predetermined angle with respect to the reference axis extending in the front-back direction.
The surface shape of the back surface of the second projection lens is a vehicle lamp designed so that the optical axis of the second projection lens is tilted by a predetermined angle with respect to the reference axis . The second optical system is moved in the front-rear direction of the vehicle so that the horizontal peak luminosity position of the plurality of second irradiation regions shifts horizontally with respect to the horizontal peak luminosity position of the plurality of first irradiation regions. The vehicle lighting tool according to claim 1, which is arranged in a state of being tilted by a predetermined angle with respect to an extending reference axis. The plurality of second light sources are such that the horizontal peak luminous intensity positions of the plurality of second irradiation regions are horizontally displaced with respect to the horizontal peak luminous intensity positions of the plurality of first irradiation regions. The vehicle lighting fixture according to claim 1, which is arranged in a state of being rotated by a predetermined angle with respect to the focal point of the projection lens. The length of the first irradiation region in the vertical direction is longer than the length of the second irradiation region in the vertical direction.
The first irradiation region and the second irradiation region are superimposed on any one of claims 1 to 3 in a state where the upper part of the first irradiation region protrudes upward from the upper edge of the second irradiation region. The vehicle lighting equipment described. The first optical system includes a first separator provided between the plurality of first light sources and the first projection lens with the plurality of first light sources facing each other.
The first separator comprises a plurality of tubular reflective surfaces in which the front end opening is larger than the rear end opening and narrows in a cone shape from the front end opening toward the rear end opening.
In the first separator, the rear end openings of the plurality of tubular reflection surfaces and the plurality of first light sources face each other so that the light from the plurality of first light sources passes through the corresponding tubular reflection surfaces. It is placed in the state of
The plurality of tubular reflecting surfaces include at least an upper reflecting surface and a lower reflecting surface.
The vehicle lamp according to claim 4 , wherein the lower reflecting surface includes an extended reflecting surface extending forward from the upper reflecting surface.

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