Vehicle lighting

Abstract

The present invention provides a vehicle lighting device that can reduce the luminous intensity of a portion of the light distribution pattern for vehicle lighting devices. [Solution] A vehicle light fixture comprising a projection lens 70, which forms a light distribution pattern for a vehicle light fixture by projecting a light intensity distribution formed near the rear focal plane of the projection lens, comprising: a first optical system that forms a light intensity distribution corresponding to a first light distribution pattern, which is a part of the light distribution pattern for the vehicle light fixture, near the rear focal plane of the projection lens; and a second optical system that forms a light intensity distribution corresponding to a second light distribution pattern, which is another part of the light distribution pattern for the vehicle light fixture, near the rear focal plane of the projection lens.

Description

[Technical Field]

[0001] This disclosure relates to vehicle lighting equipment. [Background technology]

[0002] A vehicle lighting device has been proposed that turns off (or dims) a portion of the high beam light distribution pattern corresponding to an object to be masked in front of the vehicle (for example, an oncoming vehicle) (see, for example, Patent Document 1). [Prior art documents] [Patent Documents]

[0003] [Patent Document 1] International Publication No. 2022 / 131044 [Overview of the Initiative] [Problems that the invention aims to solve]

[0004] As shown in Figure 10, when a portion of the high beam light distribution pattern HB, specifically NB, is turned off (or dimmed) (especially when driving on a right curve), the position of the driver's eyes of the oncoming vehicle, which is the object being masked, is indicated by the symbol P. In the conventional vehicle lighting equipment described above, the luminous intensity at this position P is approximately 2500 to 3000 cd, which presents the problem of glare being generated for oncoming vehicles.

[0005] This disclosure was made to solve these problems and aims to provide a vehicle lighting device that can reduce the luminous intensity of a portion of the light distribution pattern for vehicle lighting devices (for example, a light distribution pattern for low beams). [Means for solving the problem]

[0006] The vehicle lamp according to this disclosure is a vehicle lamp that includes a projection lens and forms a light distribution pattern for the vehicle lamp by projecting a light intensity distribution formed near the rear focal plane of the projection lens, comprising: a first optical system that forms a light intensity distribution corresponding to a first light distribution pattern which is a part of the light distribution pattern for the vehicle lamp near the rear focal plane of the projection lens; and a second optical system that forms a light intensity distribution corresponding to a second light distribution pattern which is another part of the light distribution pattern for the vehicle lamp near the rear focal plane of the projection lens.

[0007] This configuration makes it possible to provide a vehicle lighting device that can reduce the luminous intensity of a portion of the light distribution pattern for the vehicle lighting device.

[0008] In the above-described vehicle lighting device, the light distribution pattern for the vehicle lighting device is a light distribution pattern for low beam, the first light distribution pattern is a light distribution pattern for base low beam, and the second light distribution pattern may be a dimming light distribution pattern formed near the cutoff line of the base low beam light distribution pattern.

[0009] Furthermore, the above-mentioned vehicle lighting device may further include an ADB optical system that forms a light intensity distribution corresponding to the ADB light distribution pattern near the rear focal plane of the projection lens.

[0010] Furthermore, in the above-mentioned vehicle lighting device, the ADB optical system includes an ADB light source, the first optical system, which is a base-row optical system, includes a base-row light source, and the second optical system, which is a dimming optical system, includes a dimming light source, the dimming light source is positioned further rearward than the ADB light source, and the base-row light source may be positioned further rearward than the dimming light source.

[0011] Furthermore, in the above-mentioned vehicle lighting device, the base light source and the dimming light source may be mounted on the same circuit board.

[0012] Furthermore, in the above-mentioned vehicle lighting device, the base-low optical system further includes a base-low reflective surface, the dimming optical system further includes a dimming reflective surface, the base-low reflective surface reflects the base-low light emitted by the base-low light source so as to focus it toward the focal point of the projection lens, and forms a luminous intensity distribution corresponding to the base-low light distribution pattern near the rear focal plane of the projection lens, and the dimming reflective surface reflects the dimming light emitted by the dimming light source so as to focus it toward the focal point of the projection lens, and forms a luminous intensity distribution corresponding to the dimming light distribution pattern near the rear focal plane of the projection lens.

[0013] Furthermore, in the above-mentioned vehicle lighting device, the dimming reflective surface may be positioned on the optical path of the base low light such that it blocks a portion of the base low light, which is the reflected light from the base low reflective surface. [Effects of the Invention]

[0014] This disclosure makes it possible to provide a vehicle lighting device that can reduce the luminous intensity of a portion of the light distribution pattern for vehicle lighting devices. [Brief explanation of the drawing]

[0015] [Figure 1] This is a longitudinal cross-sectional view of the vehicle lighting fixture 10, cut along a vertical plane that includes the optical axis AX70 (reference axis) of the projection lens 70. [Figure 2] This is an example of a composite light distribution pattern P formed by the vehicle lighting fixture 10. [Figure 3] This is an exploded perspective view of the vehicle lighting fixture 10. [Figure 4] This is a perspective view of the vehicle lighting device 10 (first reflector 40 and projection lens 70 are omitted). [Figure 5] (a) Top view of the vehicle lighting device 10 (first reflector 40 and projection lens 70 omitted), (b) Front view. [Figure 6](a) Simulation results for the base low beam pattern PBLo (maximum luminous intensity 14,000 cd, luminous flux 710 lm), (b) Simulation results for the dimming beam pattern PD (maximum luminous intensity 38,000 cd, luminous flux 185 lm, dimming 100%), and (c) Simulation results for the combined beam pattern obtained by combining the base low beam pattern PBLo and the dimming beam pattern PD (maximum luminous intensity 45,000 cd, luminous flux 895 lm). [Figure 7] This represents the luminosity of the AA section (longitudinal section) in Figure 2(b). [Figure 8] This is a schematic diagram of a vehicle lighting fixture 10A, which is a modified example 1. [Figure 9] (a) A schematic diagram (top view) of the vehicle lighting fixture 10 of the embodiment, and (b) A schematic diagram (top view) of the vehicle lighting fixture 10A, which is a modified example 2. [Figure 10] This diagram illustrates the challenges of conventional technology. [Modes for carrying out the invention]

[0016] Hereinafter, a vehicle lighting device 10, which is one embodiment of the present disclosure, will be described with reference to the attached drawings. In each figure, corresponding components are denoted by the same reference numerals, and redundant explanations are omitted.

[0017] Figure 1 shows the optical axis AX of the projection lens 70 of the vehicle light fixture 10. 70 This is a longitudinal cross-sectional view taken along a vertical plane containing the (reference axis). Figure 2 shows an example of a composite light distribution pattern P formed by the vehicle lighting fixture 10.

[0018] The vehicle lighting fixtures 10 are mounted on both the left and right sides of the front end of a vehicle (not shown), such as an automobile. The vehicle lighting fixtures 10 have an ADB light distribution pattern P ADB Optical system for ADB forming a base-row light distribution pattern P BLo Optical base row forming system For vehicle lighting fixtures equipped with a dimmable light distribution pattern P that allows control of brightness, DA vehicle lamp with a dimming optical system (dimming light source 32 and dimming reflecting surface 33a) added to form it. The dimming optical system is an example of the second optical system of the present disclosure. The vehicle lamp 10 has an ADB light distribution pattern P ADB , a base low light distribution pattern P BLo (an example of the first light distribution pattern of the present disclosure), and a dimming light distribution pattern P[[ID=�]] D (an example of the second light distribution pattern of the present disclosure) to form a combined light distribution pattern P (see FIG. 2). The combined light distribution pattern P is formed, for example, on a virtual vertical screen facing the front of the vehicle (arranged about 25 m in front of the vehicle front).

[0019] The ADB light distribution pattern P ADB is mainly formed in the region A1 above the horizontal line H (see FIG. 2(a)). The ADB light distribution pattern P ADB includes a cut-off line defined by the light-shielding portion 62 of the separator 60 at its lower edge. On the other hand, the base low light distribution pattern P BLo is mainly formed in the region A2 below the horizontal line H (see FIG. 2(a)). Also, the dimming light distribution pattern P D is formed in a partial region of the base low light distribution pattern P BLo , for example, in the region A3 (see FIG. 2(a)) near the cut-off line of the base low light distribution pattern P BLo (for example, within a range of ±5 degrees to the left and right with respect to the vertical line V). Note that the dimming light distribution pattern P D may be configured to have a spread similar to that of the base low light distribution pattern P BLo near the cut-off line and in the left-right direction. That is, the left-right width of the dimming light distribution pattern P D may be shorter than the left-right width of the base low light distribution pattern P[[ID=D]] BLo , or may be similar to the left-right width of the base low light distribution pattern P BLo .

[0020] Figure 3 is an exploded perspective view of the vehicle light fixture 10. Figure 4 is a perspective view of the vehicle light fixture 10 (first reflector 40 and projection lens 70 omitted). Figure 5(a) is a top view of the vehicle light fixture 10 (first reflector 40 and projection lens 70 omitted), and Figure 5(b) is a front view.

[0021] As shown in Figures 1, 3 to 5, the vehicle lighting fixture 10 comprises a heat sink 20, a first substrate 30 (base-low light source 31 and dimming light source 32), a first reflector 40 (base-low reflective surface 41), a second reflector 33 (dimming reflective surface 33a), a second substrate 50 (ADB light source 51), a separator 60, and a projection lens 70. For the sake of explanation, the X, Y, and Z axes are defined below. The X axis extends in the longitudinal direction of the vehicle, the Y axis extends in the width direction of the vehicle, and the Z axis extends in the vertical direction.

[0022] The heat sink 20 includes a first substrate fixing surface 21 to which the first substrate 30 is fixed, and a second substrate fixing surface 22 to which the second substrate 50 is fixed. The first substrate fixing surface 21 is a surface parallel to the XY plane. The second substrate fixing surface 22 is a surface inclined at an angle θ1 (see Figure 1) with respect to the YZ plane. The angle θ1 is, for example, 10 degrees. As the material for the heat sink 20, metals with high thermal conductivity such as aluminum or copper, or alloys thereof, or alloys with low specific gravity such as magnesium are used. The heat sink 20 is manufactured by methods such as cutting, extrusion, insert, brazing, or die casting.

[0023] The first substrate 30 is a metal substrate such as aluminum. The first substrate 30 includes a light source mounting surface (top surface) on which the base-low light source 31 and the dimming light source 32 are mounted, and a back surface (bottom surface) on the opposite side. By mounting the base-low light source 31 and the dimming light source 32 on the same first substrate 30 in this way, the number of components can be reduced.

[0024] The first substrate 30 is fixed to the heat sink 20. Specifically, the first substrate 30 is fixed to the heat sink 20 (first substrate fixing surface 21) with screws N1, with the back surface (bottom surface) opposite to the light source mounting surface (top surface) facing the first substrate fixing surface 21 of the heat sink 20. At this time, a TIM80 (Thermal Interface Materials) such as thermal grease, thermal conductive sheet, or thermal conductive adhesive is provided between the heat sink 20 (first substrate fixing surface 21) and the first substrate 30 (back surface) to improve the adhesion between the two and reduce contact thermal resistance (see Figure 3).

[0025] With the first substrate 30 fixed to the heat sink 20 (see Figure 1), the dimming light source 32 is located further rearward than the ADB light source 51 mounted on the second substrate 50 and along the optical axis AX of the projection lens 70. 70 It is positioned below the [unclear]. In this embodiment, multiple (3) dimming light sources 32 are arranged in a line in the Y-axis direction with spacing between them (see Figure 5(a)).

[0026] On the other hand, with the first substrate 30 fixed to the heat sink 20 (see Figure 1), the base low light source 31 is located further rearward than the dimming light source 32 and along the optical axis AX of the projection lens 70. 70 It is positioned below the base row. In this embodiment, multiple (5) base row light sources 31 are arranged in a line in the Y-axis direction with spacing between them (see Figure 5(a)).

[0027] The base-row light source 31 and the dimming light source 32 are semiconductor light-emitting elements such as LEDs. The base-row light source 31 and the dimming light source 32 are equipped with light-emitting surfaces. The light-emitting surface is, for example, a rectangular light-emitting surface with dimensions of 1 mm on each side. The light-emitting surface is parallel to the XY plane.

[0028] Optical axis AX of base low light source 31 31 (See Figure 1) The optical axis AX of the dimming light source 32 passes through the center of the light-emitting surface of the base-low light source 31 and extends in a direction perpendicular to the light-emitting surface of the base-low light source 31. Similarly, the optical axis AX of the dimming light source 32 32(See Figure 1) extends in a direction that passes through the center of the light-emitting surface of the dimming light source 32 and is perpendicular to the light-emitting surface of the dimming light source 32.

[0029] The base-low reflective surface 41 is located above the base-low light source 31 and along the optical axis AX of the projection lens 70. 70 It is positioned higher up (see Figure 1). The base-low reflective surface 41 is the base-low light ray emitted by the base-low light source 31. 31 (See Figure 1) Focal point F of projection lens 70 70 The light is reflected in a way that concentrates it toward the projection lens 70, creating a base-low light distribution pattern P near the rear focal plane. BLo To achieve this, the baselow reflective surface 41 is, for example, the first focal spot F1 41 The base low light source 31 is set near the second focus F2 41 The projection lens has a focal length of F 70. 70 It is configured as an elliptical reflective surface set in the vicinity. The base row reflective surface 41 is provided, for example, on the first reflector 40 which is fixed to the heat sink 20 with screws N2.

[0030] On the other hand, the dimming reflective surface 33a is above the dimming light source 32, along the optical axis AX of the dimming light source 32. 32 Further towards the rear of the vehicle, and the optical axis AX of the projection lens 70 70 It is positioned higher up (see Figure 1). The dimming reflective surface 33a is mainly the optical axis AX of the light emitted by the dimming light source 32. 32 Light directed towards the rear of the vehicle (the dimming light Ray shown in Figure 1) 32 (Reference) Focal length of projection lens 70 F 70 The light is reflected in a way that concentrates it toward the projection lens 70, and a light distribution pattern P for dimming is formed near the rear focal plane of the projection lens 70. D To achieve this, the light-adjusting reflective surface 33a is, for example, the first focal spot F1 33a The dimming light source 32 is set near the second focal point F2 33a The projection lens has a focal length of F 70. 70It is configured as an elliptical reflective surface set in the vicinity. The dimming reflective surface 33a is provided, for example, on a second reflector 33 fixed to the light source mounting surface (upper surface) of the first substrate 30 with screws N3. Of the light emitted by the dimming light source 32, mainly its optical axis AX 32 To prevent stray light from being directed further forward on the vehicle, the first substrate 30 (light source mounting surface) has a light source 32 that emits light, mainly along its optical axis AX. 32 A light-blocking section 34 is fixed in place to block light directed towards the front of the vehicle.

[0031] As described above, the base low beam pattern P BLo A base-row optical system (base-row light source 31 and base-row reflective surface 41), which is an example of the first optical system of the present disclosure, forms a dimming light distribution pattern P D It is positioned behind the vehicle, and is an example of a second optical system of the present disclosure, a dimming optical system (dimming light source 32 and dimming reflective surface 33a) that forms the dimming light distribution pattern P. By arranging it in this way and increasing the optical path length of the light for the base low, a small, high-luminosity dimming light distribution pattern P is formed. D It can form a wide base-low light distribution pattern P in the left-right direction. BLo It is possible to form this.

[0032] The second substrate 50 is a metal substrate such as aluminum. The second substrate 50 includes a light source mounting surface (vehicle front side) on which the ADB light source 51 is mounted and a back surface on the opposite side (vehicle rear side).

[0033] The second substrate 50 is fixed to the heat sink 20. Specifically, the back surface (rear surface of the vehicle) of the second substrate 50, opposite to the light source mounting surface (front surface of the vehicle), faces the second substrate fixing surface 22 of the heat sink 20, and is fixed to the heat sink 20 (second substrate fixing surface 22) with screws N4 at an angle θ1 (see Figure 1) with respect to the YZ plane. At this time, a TIM80 (Thermal Interface Materials) such as thermal grease, thermal conductive sheet, or thermal conductive adhesive is provided between the heat sink 20 (second substrate fixing surface 22) and the second substrate 50 (back surface) to improve the adhesion between the two and reduce contact thermal resistance.

[0034] With the second substrate 50 fixed to the heat sink 20 (see Figure 1), the ADB light source 51 is located further forward of the vehicle than the dimming light source 32 and along the optical axis AX of the projection lens 70. 70 It is positioned below the [unclear]. In this embodiment, multiple (13) ADB light sources 51 are arranged in a line along the Y-axis with spacing between them (see Figures 3 and 5(b)).

[0035] The ADB light source 51 is a semiconductor light-emitting element such as an LED. The ADB light source 51 has a light-emitting surface. The light-emitting surface is, for example, a rectangular light-emitting surface with dimensions of 1 mm on each side. The light-emitting surface is tilted at an angle θ1 (see Figure 1) with respect to the XY plane. By tilting it at an angle θ1 in this way, the optical axis AX of the ADB light source 51 is 51 (See Figure 1) shows the focal point F of the projection lens 70. 70 Approaching. The ADB light source 51 (LED light source) emits light in a Lambertsian pattern, so its optical axis AX 51 The luminosity at the top is relatively high. Therefore, by tilting it at an angle θ1, an ADB light distribution pattern P with a relatively high central luminosity is achieved. ADB This can be achieved. Note that the optical axis AX of the ADB light source 51 51 (See Figure 1) extends in a direction that passes through the center of the light-emitting surface of the ADB light source 51 and is perpendicular to the light-emitting surface of the ADB light source 51.

[0036] The separator 60 is made of a metal such as aluminum. The separator 60 includes a separator body 61 and a light-shielding part 62.

[0037] The separator 60 is fixed to the heat sink 20. Specifically, the separator 60 is fixed to the heat sink 20 (second substrate fixing surface 22) together with the second substrate 50 with screws N4, with the back surface opposite the front surface of the separator body 61 facing the second substrate fixing surface 22 of the heat sink 20.

[0038] The light-shielding portion 62 is provided at the upper end of the surface side of the separator body 61. With the separator 60 fixed to the heat sink 20 (see Figure 1), the light-shielding portion 62 is positioned from the upper end of the separator body 61 to the optical axis AX of the projection lens 70. 70 It extends toward the projection lens 70 along the same direction (see Figure 1). The tip of the light-shielding portion 62 is curved along the back focal plane of the projection lens 70 (see Figure 5(a)). In addition, a Z-shaped step corresponding to the step of the cutoff line is provided at the center of the tip of the light-shielding portion 62 in the Y-axis direction (see Figure 5(b)).

[0039] Furthermore, with the separator 60 fixed to the heat sink 20 (see Figure 1), the ADB light sources 51 (multiple) are exposed through through holes 61a (partitions) formed in the separator body 61 (see Figure 5(b)).

[0040] The projection lens 70 is an aspherical lens. The projection lens 70 is held by a retaining part 42, which is part of the first reflector 40 and fixed to the heat sink 20 with screws N2. The focal point F of the projection lens 70 70 It is located in the center of the light-shielding portion 62 of the separator 60 in the Y-axis direction (see Figures 5(a) and 5(b)).

[0041] According to the vehicle lighting device 10 with the above configuration, the base low light distribution pattern P shown in Figure 2 BLo It is formed as follows:

[0042] In other words, when the base-row light source 31 is turned on, the base-row light Ray emitted from the base-row light source 31 31 (See Figure 1) The base row reflecting surface 41 controls the focal point F of the projection lens 70. 70 The light is reflected in a way that concentrates it toward the second reflector 33 (dimming reflective surface 33a) and partially shielded by the light-shielding portion 62 of the separator 60, and then the base-low light distribution pattern P is formed near the rear focal plane of the projection lens 70. BLo This forms a corresponding luminous intensity distribution. This luminous intensity distribution is projected forward by the projection lens 70, resulting in the base-low light distribution pattern P shown in Figure 2. BLo This base low light distribution pattern P is formed. BLo It includes a cutoff line defined by the light-shielding portion 62 of the separator 60 at its upper edge.

[0043] Furthermore, the light source 31 for the base row emits a light ray for the base row. 31 (See Figure 1) is partially blocked by the dimming reflective surface 33a placed on its optical path, so the base low light distribution pattern P BLo A portion of the area (dimmable light distribution pattern P) D The region A3) where the dimming reflective surface 33a is formed becomes darker compared to the case where the dimming reflective surface 33a is not present.

[0044] Figure 6(a) shows the base low beam pattern P. BLo This is the simulation result (maximum luminous intensity 14,000 cd, luminous flux 710 lm).

[0045] According to the vehicle lighting fixture 10 with the above configuration, the dimming light distribution pattern P shown in Figure 2 D It is formed as follows:

[0046] In other words, when the dimming light source 32 is turned on, the dimming light Ray emitted by the dimming light source 32 32 (See Figure 1) The light-adjusting reflective surface 33a adjusts the focal point F of the projection lens 70. 70 The light is reflected to focus toward the rear, and after being partially blocked by the light-shielding portion 62 of the separator 60, a light distribution pattern P for dimming is formed near the rear focal plane of the projection lens 70.D This forms a corresponding luminous intensity distribution. This luminous intensity distribution is projected forward by the projection lens 70, resulting in the dimming light distribution pattern P shown in Figure 2. D This dimming light distribution pattern P is formed. D It includes a cutoff line defined by the light-shielding portion 62 of the separator 60 at its upper edge. A dimming light distribution pattern P is formed in region A3 near the cutoff line (for example, within a range of ±5 degrees to the left and right of the vertical line V). D The brightness can be adjusted by controlling the brightness of the dimmable light source 32.

[0047] Figure 6(b) shows the dimming light distribution pattern P D The simulation results are shown (maximum luminous intensity 38,000 cd, luminous flux 185 lm, dimming 100%). Figure 6(c) shows the light distribution pattern P for base low. BLo and dimming light distribution pattern P D This is the simulation result of the combined light distribution pattern (maximum luminous intensity 45,000 cd, luminous flux 895 lm).

[0048] Note: Dimming light distribution pattern P D The region A3 in which the dimming light source 32 and the dimming reflective surface 33a are formed can be adjusted, for example, by shifting them in the Y-axis direction. D The size can be adjusted, for example, by adjusting the size of the dimming reflective surface 33a.

[0049] According to the vehicle lighting fixture 10 with the above configuration, the ADB light distribution pattern P shown in Figure 2 ADB It is formed as follows:

[0050] In other words, when the ADB light source 51 is turned on, the ADB light Ray emitted from the ADB light source 51 51 (See Figure 1) The light passes through the through hole 61a (partition) formed in the separator 60 (separator body 61), is partially shielded by the light-shielding portion 62 of the separator 60, and then the ADB light distribution pattern P is formed near the rear focal plane of the projection lens 70. ADBThis forms a corresponding luminous intensity distribution. This luminous intensity distribution is projected forward by the projection lens 70, resulting in the ADB light distribution pattern P shown in Figure 2. ADB This ADB light distribution pattern P is formed. ADB It includes a cutoff line defined by the light-shielding portion 62 of the separator 60 at its lower edge.

[0051] Although not shown in the diagram, if there is an object to be masked (for example, an oncoming vehicle traveling in the opposite lane ahead of the vehicle equipped with the vehicle light fixture 10 (not shown)) in front of the vehicle equipped with the vehicle light fixture 10, the control device controls the illumination state of the ADB light source 51 to create an ADB light distribution pattern P that includes a non-illuminated area B1 (see Figure 2(b)) that does not illuminate the object to be masked. ADB A non-irradiated area B1 is formed, for example, by turning off (or dimming) the ADB light source 51 corresponding to the mask object.

[0052] Next, as described above, the dimmable optical system (dimmable light source 32 and dimmable reflective surface 33a) is used to create a dimmable light distribution pattern P D Forms a dimmable light distribution pattern P D This section explains the effect of adjusting the brightness (luminous intensity). Note that the dimming light distribution pattern P is not shown in the diagram. D The brightness (luminous intensity) can be adjusted by the control device controlling the lighting state of the dimming light source 32.

[0053] Figure 7 shows the luminous intensity of the AA cross-section (longitudinal section) in Figure 2(b). In Figure 7, the symbol b1 represents the luminous intensity when the base-low light source 31 and the dimming light source 32 are both lit at maximum brightness. On the other hand, the symbol b2 in Figure 7 represents the luminous intensity when the base-low light source 31 is lit at maximum brightness and the dimming light source 32 is lit at a reduced brightness.

[0054] Referring to Figure 7, comparing the luminous intensity at position P1, we find that b2 ≈ 1 / 3 × b1, and the dimming light distribution pattern P D It can be seen that adjusting the brightness (luminosity) can suppress glare for oncoming vehicles.

[0055] As described above, according to the present embodiment, the dimming light distribution pattern P is formed by the dimming optical system (the dimming light source 32 and the dimming reflecting surface 33a) as described above. D and the brightness (luminance) of the dimming light distribution pattern P D (region A3) can be adjusted to suppress the generation of glare to oncoming vehicles.

[0056] For example, when the headlamp is lit and in the ADB mode, and an oncoming vehicle, which is an object to be masked, exists near the center of the vehicle (near the vertical line V), the base low beam light source 31 and the ADB light source 51 are lit, and the dimming light source 32 is lit in a dimmed state. Thereby, the generation of glare to oncoming vehicles can be suppressed. On the other hand, when the headlamp is lit and in the ADB mode, in other cases, that is, when no oncoming vehicle, which is an object to be masked, exists near the center of the vehicle (near the vertical line V), the base low beam light source 31 and the ADB light source 51 are lit, and the dimming light source 32 is lit brighter than in the dimmed state. Thereby, the visibility of the driver of the vehicle on which the vehicle lamp 10 is mounted can be ensured.

[0057] As described above, in the present embodiment, a vehicle lamp 10 that can obtain good visibility during normal times and can suppress the generation of glare to oncoming vehicles when ADB functions can be realized with a simple configuration.

[0058] Further, according to the present embodiment, with one vehicle lamp, the brightness of a part of the light distribution pattern for the vehicle lamp can be lowered. The light distribution pattern for the vehicle lamp whose brightness is to be lowered may be the low beam light distribution pattern (the base low beam light distribution pattern P BLo and the dimming light distribution pattern P D constituted thereby) described in the present embodiment, or may be other light distribution patterns.

[0059] Further, according to the present embodiment, the base low beam optical system that forms the base low beam light distribution pattern P BLo and the dimming light distribution pattern P DThe dimming optical system (dimming light source 32 and dimming reflecting surface 33a) for forming is provided in one vehicle lamp 10, and since both optical systems use the same light shielding portion 62, the cut-off line of the base low beam light distribution pattern P BLo and the cut-off line of the dimming light distribution pattern P D have the advantage that they do not shift.

[0060] Also, according to the present embodiment, with the same light shielding portion 62, the light near the H line of the base low beam light distribution pattern P BLo (a part of the light Ray for base low beam 31 and a part of the light Ray for dimming 32 ) is cut off, and thus glare is also suppressed by this.

[0061] Next, a modified example will be described.

[0062] FIG. 8 is a schematic configuration diagram of a vehicle lamp 10A which is a modified example 1.

[0063] In FIG. 8, the same components as those in the above embodiment are denoted by the same reference numerals and the description thereof is omitted.

[0064] As shown in FIG. 8, as the base low beam optical system for forming the base low beam light distribution pattern P BLo , instead of the base low beam reflecting surface 41, a collimating lens 91 disposed in front of the base low beam light source 31 may be used. Similarly, as the dimming optical system for forming the dimming light distribution pattern P D , instead of the dimming reflecting surface 33a, a collimating lens 92 disposed in front of the dimming light source 32 may be used. Note that the base low beam optical system (base low beam light source 31 and collimating lens 91) is preferably disposed above the dimming optical system (dimming light source 32 and collimating lens 92), but may be disposed below the dimming optical system (dimming light source 32 and collimating lens 92).

[0065] In this modified example 1, when the base-low light source 31 is turned on, the base-low light emitted from the base-low light source 31 is collimated by the collimating lens 91, partially blocked by the light-shielding portion 62 of the separator 60, and then a base-low light distribution pattern P is formed near the rear focal plane of the projection lens 70. BLo This forms a corresponding luminous intensity distribution. This luminous intensity distribution is projected forward by the projection lens 70, resulting in the base-low light distribution pattern P shown in Figure 2. BLo A formation is created.

[0066] On the other hand, when the dimming light source 32 is turned on, the dimming light Ray emitted from the dimming light source 32 32 (See Figure 1) The light is collimated by the collimating lens 92 and partially shielded by the light-shielding portion 62 of the separator 60, and then a light-adjusting light distribution pattern P is formed near the rear focal plane of the projection lens 70. D This forms a corresponding luminous intensity distribution. This luminous intensity distribution is projected forward by the projection lens 70, resulting in the dimming light distribution pattern P shown in Figure 2. D A formation is created.

[0067] According to this modified example 1, the same effects as those of the above embodiment can be achieved.

[0068] Furthermore, according to this modified example 1, the light source substrate can be made common by arranging the base-low light source 31 and the dimming light source 32 on the same plane.

[0069] Furthermore, according to this modified example 1, the focal point F of the projection lens 70 70 Because there are no optical components that obstruct the concentration of light, the efficiency of light utilization is improved.

[0070] Figure 9(a) is a schematic configuration diagram (top view) of the vehicle lighting device 10 of the embodiment, and Figure 9(b) is a schematic configuration diagram (top view) of the vehicle lighting device 10A, which is a modified example 2.

[0071] In Figures 9(a) and 9(b), components similar to those in the above embodiment are denoted by the same reference numerals and their descriptions are omitted.

[0072] As shown in Figure 9(a), in the above embodiment, the base low light distribution pattern P BLo A base-row light source 31 and a base-row reflective surface 41 were used as the base-row optical system for forming the base-row.

[0073] In contrast, in this modified example 2, as shown in Figure 9(b), the base low light distribution pattern P BLo The base-row optical system used to form the base-row optical system consists of base-row light sources 31a and 31b, and base-row reflective surfaces 41a and 41b.

[0074] The base-low reflective surface 41a is located above the base-low light source 31a, along the optical axis AX of the projection lens 70. 70 Looking further up and from above, the optical axis AX of the projection lens 70 is visible. 70 It is positioned on one side (the lower side in Figure 9(b)). The base-low reflecting surface 41a reflects the base-low light emitted by the base-low light source 31a to the focal point F of the projection lens 70. 70 The light is reflected in a way that concentrates it toward the projection lens 70, creating a base-low light distribution pattern P near the rear focal plane. BLo To achieve this, the baselow reflective surface 41a is, for example, the first focal spot F1 41a The base low light source 31a is set near the second focus F2 41a The projection lens has a focal length of F 70. 70 It is configured as an elliptical reflective surface set in the vicinity.

[0075] Similarly, the base-low reflective surface 41b is above the base-low light source 31b, along the optical axis AX of the projection lens 70. 70 Looking further up and from above, the optical axis AX of the projection lens 70 is visible. 70 It is positioned on the other side (upper side in Figure 9(b)). The base-low reflecting surface 41b reflects the base-low light emitted by the base-low light source 31b to the focal point F of the projection lens 70. 70 The light is reflected in a way that concentrates it toward the projection lens 70, creating a base-low light distribution pattern P near the rear focal plane. BLoTo achieve this, the baselow reflective surface 41b is, for example, the first focal spot F1 41b The base low light source 31b is set near the second focus F2 41b The projection lens has a focal length of F 70. 70 It is configured as an elliptical reflective surface set in the vicinity.

[0076] In this modified example 2, when the base-low light source 31a is turned on, the light emitted from the base-low light source 31a is reflected by the base-low reflecting surface 41a at the focal point F of the projection lens 70. 70 The light is reflected in a way that concentrates it toward the second reflector 33 (dimming reflective surface 33a) and partially shielded by the light-shielding portion 62 of the separator 60, and then the base-low light distribution pattern P is formed near the rear focal plane of the projection lens 70. BLo It forms a corresponding luminous intensity distribution. Similarly, when the base-low light source 31b is turned on, the base-low light emitted by the base-low light source 31b is reflected by the base-low reflecting surface 41b at the focal point F of the projection lens 70. 70 The light is reflected in a way that concentrates it toward the second reflector 33 (dimming reflective surface 33a) and partially shielded by the light-shielding portion 62 of the separator 60, and then the base-low light distribution pattern P is formed near the rear focal plane of the projection lens 70. BLo This forms a corresponding luminous intensity distribution. The above luminous intensity distribution is projected forward by the projection lens 70, resulting in the base-low light distribution pattern P shown in Figure 2. BLo A formation is created.

[0077] According to this modified example 2, the same effects as those of the above embodiment can be achieved.

[0078] Furthermore, according to this modified example 2, due to the arrangement of the base-low reflective surfaces 41a and 41b, the amount of base-low light (reflected light from the base-low reflective surfaces 41a and 41b) that is blocked by the second reflector 33 (dimming reflective surface 33a) is reduced, thus improving light utilization efficiency.

[0079] Furthermore, according to this modified example 2, by distributing the base-row light sources 31a and 31b, the heat generated by the base-row light sources 31a and 31b is also dispersed, thereby improving the light utilization efficiency.

[0080] The numerical values ​​shown in the above embodiments are all examples, and it goes without saying that other appropriate numerical values ​​can be used.

[0081] The embodiments described above are merely illustrative in all respects. The invention is not to be construed as limiting by the description of the embodiments above. The invention can be carried out in various other ways without departing from its spirit or main features. [Explanation of Symbols]

[0082] 10, 10A... Vehicle lighting fixtures 20… Heatsink 21...First board fixing surface 22…Second board fixing surface 30…First circuit board 31, 31a, 31b... Light sources for base row 32...Light source for dimming 33…Second reflector 33a…Reflective surface for dimming 34... Light-shielding part 40…1st reflector 41, 41a, 41b... Reflective surfaces for base row 42...Holding part 50...Second board 51…ADB light source 52…Second board fixing surface 60... Separator 61... Separator body 61a... Through hole 62... Light-shielding part 70…Projection lens 91, 92... Collimating lenses AX 31 AX 32 AX 51 AX 70 …optical axis B1…Non-irradiation area F133a F1 41 F1 41a F1 41b …first focus F2 33a F2 41 F2 41a F2 41b …Second focus F 70 …focus N1~N4... screw P...Composite light distribution pattern P ADB ...ADB light distribution pattern P BLo ...Light distribution pattern for base low P D ...dimmable light distribution pattern

Claims

1. A vehicle light fixture comprising a projection lens, which forms a light distribution pattern for a vehicle light fixture by projecting a luminous intensity distribution formed near the rear focal plane of the projection lens, A first optical system that forms a luminous intensity distribution corresponding to a first light distribution pattern, which is part of the light distribution pattern for the vehicle lighting device, near the rear focal plane of the projection lens, A vehicle lamp comprising: a second optical system that forms a luminous intensity distribution near the rear focal plane of the projection lens that corresponds to a second light distribution pattern, which is another part of the aforementioned light distribution pattern for the vehicle lamp.

2. The aforementioned light distribution pattern for vehicle lighting is a light distribution pattern for low beams. The first light distribution pattern is a light distribution pattern for base low beam, The vehicle lamp according to claim 1, wherein the second light distribution pattern is a dimming light distribution pattern formed near the cutoff line of the base low light distribution pattern.

3. The vehicle lighting device according to claim 2, further comprising an optical system for ADB that forms an intensity distribution corresponding to an ADB light distribution pattern near the rear focal plane of the projection lens.

4. The aforementioned optical system for ADB includes an ADB light source, The first optical system, which is a base-row optical system, includes a base-row light source, The second optical system described above, the photochromic optical system, includes a photochromic light source. The dimming light source is positioned further rearward than the ADB light source. The vehicle lighting device according to claim 3, wherein the base light source is positioned further rearward than the dimming light source.

5. The vehicle lighting device according to claim 4, wherein the base light source and the dimming light source are mounted on the same circuit board.

6. The base-row optical system further includes a base-row reflecting surface, The aforementioned photochromic optical system further includes a photochromic reflective surface, The base-low reflective surface reflects the base-low light emitted by the base-low light source so as to focus it toward the focal point of the projection lens, and forms a luminous intensity distribution corresponding to the base-low light distribution pattern near the rear focal plane of the projection lens. The vehicle lamp according to claim 4, wherein the dimming reflective surface reflects the dimming light emitted by the dimming light source so as to focus it toward the focal point of the projection lens, and forms a luminous intensity distribution corresponding to the dimming light distribution pattern near the rear focal plane of the projection lens.

7. The vehicle lamp according to claim 6, wherein the dimming reflective surface is arranged on the optical path of the base low light such that it blocks a portion of the base low light, which is reflected light from the base low reflective surface.

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