JP7275481B2 - vehicle lamp - Google Patents

Description

The present disclosure relates to vehicle lamps.

A vehicle lamp uses light from a light source to form a predetermined light distribution pattern.

Such a vehicle lamp is known to form a light distribution pattern for passing by the light from the first light source and to form a light distribution pattern for running by the light from the second light source. Reference 1, etc.). This vehicle lamp projects light emitted from a first light source and reflected by a reflector, and light emitted from a second light source provided in front of the first light source and guided by a translucent member. A light distribution pattern for passing and a light distribution pattern for running are arranged vertically by emitting the light toward the front of the vehicle with a lens. In order to efficiently use the light emitted from the first light source provided behind the second light source and reflected by the reflector, the vehicle lamp includes a reflector and a projection lens except for intentional light blocking by a shade. It is arranged so as not to hinder the progress of light between

Japanese Unexamined Patent Application Publication No. 2016-39110

However, in the conventional vehicular lamp, the light emitted from the second light source is guided to the projection lens by the light-transmitting member by reflecting the light from the reflecting surface provided in the light-transmitting member to the projection lens. It is necessary to make the optical member large. For this reason, the conventional vehicle lamp is provided with a step between the first light source and the second light source so that the second light source is positioned below the first light source. As a result, in the conventional vehicle lamp, the shape of the member to which the first light source and the second light source are attached becomes complicated, and it is necessary to provide separate substrates for the first light source and the second light source.

The present disclosure has been made in view of the above circumstances, and a vehicle capable of forming a light distribution pattern for passing and a light distribution pattern for running overlappingly and providing a first light source and a second light source without a step. The purpose is to provide lighting fixtures for

A vehicle lamp according to the present disclosure includes a first light source that emits light that forms a light distribution pattern for passing, and a first light source that is provided on the front side in the optical axis direction of the first light source and emits light that forms a light distribution pattern for driving. a second light source, a reflector that reflects the light emitted from the first light source and the second light source, a first lens that projects the light reflected by the reflector forward in an optical axis direction, and the second light source and a second lens for causing the light emitted from the light source to travel toward the reflector, the second light source being provided on the same plane as the first light source, and the reflector being the light emitted from the first light source. a first reflecting surface that reflects light to the first lens; and a second reflective surface that reflects to one lens.

According to the vehicular lamp of the present disclosure, the first light source and the second light source can be provided without steps while the light distribution pattern for passing and the light distribution pattern for running are superimposed.

1 is an explanatory diagram showing a configuration of a vehicle lamp as an example according to an embodiment of the vehicle lamp according to the present disclosure; FIG. FIG. 4 is an explanatory diagram showing a light distribution pattern for running and a light distribution pattern for passing; FIG. 3 is an explanatory diagram similar to FIG. 2 showing a state in which some of the light distribution parts for running are turned off in the light distribution pattern for running;

A first embodiment of a vehicle lamp 10 as one embodiment of a vehicle lamp according to the present disclosure will be described below with reference to FIGS. 1 to 3. FIG.

The vehicle lamp 10 is used as a lamp for a vehicle such as an automobile, and is used as a headlamp, a fog lamp, or the like, for example. The vehicular lamp 10 has a lamp chamber formed by covering the open front end of the lamp housing with an outer lens on both left and right sides of the front part of the vehicle, and includes a vertical optical axis adjustment mechanism and a width direction optical axis adjustment mechanism. Provided through a mechanism. In the following description, in the vehicle lamp 10, the traveling direction of the vehicle when the vehicle travels straight and the direction in which light is emitted is defined as the optical axis direction, and the vertical direction when mounted on the vehicle is defined as the vertical direction. And the direction orthogonal to the vertical direction is defined as the width direction.

The vehicle lamp 10 includes a first light source 11, a second light source 12, a heat sink member 13, a reflector 14, a shade 15, a first lens 16, and a second lens 17, as shown in FIG. Configure the lighting unit.

The first light source 11 is composed of a light emitting element such as an LED (Light Emitting Diode) and mounted on the substrate 20 . The substrate 20 is fixed to the upper surface 13 a of the heat sink member 13 . The first light source 11 is supplied with power from a lighting control circuit and is appropriately lit.

The second light source 12 is composed of a light-emitting element such as an LED, and is mounted on the substrate 21 in front of the first light source 11 in the optical axis direction (the side on which light is emitted from the vehicle lamp 10). The substrate 21 is fixed to the upper surface 13a of the heat sink member 13 on the front side of the substrate 20 in the optical axis direction. Therefore, the second light source 12 is provided on the same plane as the first light source 11 . The second light source 12 is appropriately lit by being supplied with power from the lighting control circuit. The second light source 12 of Example 1 is provided with five light source portions 12a (only one on the front side is shown in FIG. 1) aligned in the width direction on the substrate 21 . Each light source unit 12a is composed of a light emitting element, and is appropriately lit all at once or individually by being supplied with power from a lighting control circuit. Note that the number of light source units 12a may be set as appropriate, and is not limited to the configuration of the first embodiment.

The heat sink member 13 is a heat dissipation member that releases heat generated by the first light source 11 and the second light source 12 to the outside. In this heat sink member 13, a substrate 20 and a substrate 21 are provided on the upper surface 13a, and a reflector 14 is provided on the upper surface 13a so as to cover the substrates (20, 21). In the heat sink member 13 of the first embodiment, the upper surface 13a on which the first light source 11 and the second light source 12 are provided through both substrates (20, 21) is positioned at the physical center position of the first lens 16 (an emission surface to be described later). 16b) in the vertical direction. Accordingly, among the lights emitted from the first light source 11 and the second light source 12 provided on the upper surface 13a, light having a high intensity can be effectively used.

The reflector 14 is attached to the heat sink member 13 (upper surface 13a) so as to cover the substrates 20 and 21, that is, the first light source 11 and the second light source 12 mounted thereon. The reflector 14 has a first reflecting surface 22 and a second reflecting surface 23 facing the upper surface 13a. The first reflecting surface 22 is provided to reflect the light emitted from the first light source 11 toward the first lens 16 . The first reflecting surface 22 is a free curved surface based on an ellipse with the first light source 11 as the first focus and the vicinity of the tip edge 15a of the shade 15, which will be described later, as the second focus. The first reflecting surface 22 forms a passing light distribution pattern LP (see FIG. 2) by reflecting the light from the first light source 11 forward and emitting the light through the first lens 16 .

The second reflecting surface 23 is provided to reflect the light emitted from the second light source 12 and passing through the second lens 17 to the first lens 16 as will be described later. The second reflecting surface 23 has a first focal point in the vicinity of the condensing point of the second lens 17, and is located at substantially the same distance as the rear focal point of the first lens 16, and is located on the rear side of an upper lens surface 25, which will be described later. It is a free-form surface based on an ellipse with a second focus near the focal point. As will be described later, the second reflecting surface 23 reflects the light from the second light source 12 condensed by the second lens 17 forward and emits the light through the first lens 16, thereby forming a driving light distribution pattern HP. (see FIG. 2).

The shade 15 is provided on the heat sink member 13 and has a plate shape extending in the width direction while being perpendicular to the vertical direction. A tip edge 15a on the front side in the optical axis direction of the shade 15 has a shape in which two horizontal edges located at different positions in the optical axis direction are connected by an inclined edge. The shade 15 blocks part of the light emitted from the first light source 11 and reflected by the first reflecting surface 22 of the reflector 14 with the tip edge 15a, thereby forming a light distribution pattern LP for passing each other, which will be described later. form a cut-off line Cl (see Fig. 2) connecting two horizontal lines with sloping lines

The first lens 16 projects the light reflected by the first reflecting surface 22 of the reflector 14 forward of the vehicle to form a passing light distribution pattern LP (see FIG. 2). Also, the first lens 16 projects the light reflected by the second reflecting surface 23 of the reflector 14 forward of the vehicle to form a driving light distribution pattern HP (see FIG. 2).

The first lens 16 of Example 1 has a lower lens surface 24 and an upper lens surface 25 on the incident surface 16a on the side of the first light source 11 or the second light source 12, that is, on the rear side in the optical axis direction. The lower lens surface 24 is a portion where the light reflected by the first reflecting surface 22 of the reflector 14 is incident, and cooperates with the light emitting surface 16b on the front side in the optical axis direction of the first lens 16 to distribute light for passing. A pattern LP (see FIG. 2) is formed. The lower lens surface 24 sets the rear focal point of the lower portion of the first lens 16 between the output surface 16b and the portion facing the lower lens surface 24 in the vicinity of the leading edge 15a of the shade 15. .

The upper lens surface 25 is a portion where the light reflected by the second reflecting surface 23 is incident, and cooperates with the output surface 16b of the first lens 16 to form the light distribution pattern for running HP (see FIG. 2). do. The upper lens surface 25 sets the rear focal point of the upper portion of the first lens 16 between the output surface 16 b and the portion facing the upper lens surface 25 in the vicinity of the second focal point of the second reflecting surface 23 . I am letting

Further, the upper lens surface 25 of Example 1 is provided with fine rhombus-shaped unevenness (microstructure). As a result, the upper lens surface 25 diffuses the light from the second light source 12 reflected by the second reflecting surface 23 in the vertical direction, thereby equalizing the amount of light in the light distribution pattern for running HP, while the light distribution pattern for running HP is uniform. Expands HP vertically. As long as the unevenness diffuses the light from the second light source 12 in the vertical direction, the shape, the range to be provided, the number and the size of the unevenness may be appropriately set. 16b, and is not limited to the configuration of the first embodiment. In addition, if necessary, the unevenness may be appropriately provided on the lower lens surface 24 in the light distribution pattern LP for passing, or may be provided on the exit surface 16b facing the first reflecting surface 22. is not limited to the configuration of

This first lens 16 is supported by a lens holder. The lens holder is attached to the heat sink member 13 with the first lens 16 positioned with respect to the second lens 17 on the first light source 11, the second light source 12, the reflector 14, and the shade 15. FIG.

The second lens 17 collects the light emitted from the second light source 12 and causes it to travel to the second reflecting surface 23 of the reflector 14 . The second lens 17 of Example 1 is formed of a cylindrical lens that extends in the width direction and has refractive power only in the optical axis direction, corresponding to the fact that the second light source 12 is composed of five light source units 12a. is provided on the heat sink member 13 . The second lens 17 has a focal line extending in the width direction along the five light source units 12a, and collects light emitted from each light source unit 12a (second lens 17) in the optical axis direction. to advance to the second reflecting surface 23 . The second lens 17 is not limited to the configuration of the first embodiment as long as it allows the light emitted from the second light source 12 to travel to the second reflecting surface 23 .

The vehicle lamp 10 appropriately lights the first light source 11 by supplying electric power from the lighting control circuit to the first light source 11 from the substrate 20 . By this lighting, the vehicle lamp 10 reflects the light from the first light source 11 on the first reflecting surface 22 of the reflector 14, passes through the lower lens surface 24, and emits it from the first lens 16, thereby cutting the light into the upper edge. A light distribution pattern for passing LP (see FIG. 2) having offline Cl is formed.

Further, the vehicle lamp 10 appropriately lights the second light source 12 (each light source 12a thereof) by supplying electric power from the lighting control circuit to each light source 12a of the second light source 12 from the substrate 21 . By this lighting, the vehicle lamp 10 collects the light from the second light source 12 with the second lens 17, reflects it with the second reflecting surface 23 of the reflector 14, passes through the upper lens surface 25, and emits it from the first lens 16. As a result, the light distribution pattern for running HP (see FIG. 2) is formed so that the lower end overlaps the upper end of the light distribution pattern for passing LP.

The vehicle lamp 10 of Example 1 is an ADB (Adaptive Driving Beam (light distribution variable headlamp)), and when the five light source units 12a of the second light source 12 are turned on, Each light forms a running light distribution portion hp (see FIG. 2). The five running light distribution parts hp are arranged in the width direction and integrally formed to form a running light distribution pattern HP (see FIG. 2). The vehicle lamp 10 individually turns on and off the light source units 12a of the second light source 12, thereby making it possible to partially turn off the light in a specific direction among the five running light distribution units hp. (See Figure 3). Thus, the vehicle lamp 10 can partially turn off the light in any direction in the driving light distribution pattern HP by individually turning on and off the light sources 12a.

Therefore, the vehicular lamp 10 can form the light distribution pattern LP for passing each other having the cutoff line Cl by lighting the first light source 11, and by lighting each light source section 12a of the second light source 12, the vehicle lighting device 10 can A light distribution pattern HP can be formed (see FIG. 2). The vehicular lamp 10 controls the lighting of the light source portions 12a of the first light source 11 and the second light source 12, so that the passing light distribution pattern LP and the running light distribution pattern HP can be formed simultaneously or only one of them as appropriate. In addition, the vehicle lamp 10 does not form only the light distribution portion hp for traveling in the corresponding direction by turning off the light source portion 12a positioned in an arbitrary direction among the light source portions 12a of the second light source 12. can realize the function of ADB (see Fig. 3).

In this manner, the vehicle lamp 10 only condenses the light from the second light source 12 with the second lens 17 provided above the second light source 12, and the light is provided above the second lens 17. The light is reflected toward the first lens 16 by the second reflecting surface 23 of the reflector 14 . For this reason, the vehicle lamp 10 does not need the second lens 17 to reflect the light from the second light source 12 to the first lens 16 side unlike the translucent member of the prior art. can be configured. As a result, even if the second light source 12 and the first light source 11 are provided at the same position (on the same plane) in the vertical direction, the vehicle lamp 10 can emit light from the first light source 11 on the first reflecting surface 22 of the reflector 14 . It is possible to prevent the second lens 17 from interfering with the progress of the reflected light toward the first lens 16 . Therefore, the vehicular lamp 10 can flatten the portions (upper surface 13a in the first embodiment) where the first light source 11 and the second light source 12 are mounted, and the shape of the member (the heat sink member 13 in the first embodiment) to which they are mounted can be flattened. can be simplified, and the first light source 11 and the second light source 12 can be provided on the same plane. Since the substrates 20 and 21 are provided on the upper surface 13a which is the same plane, they may be integrated into a single substrate.

In particular, in the vehicle lamp 10 of Example 1, the first light source 11 and the second light source 12 are attached to the heat sink member 13 via the substrates 20 and 21 . Here, in general, in a heat sink, since heat is radially transferred from a heat source, the cooling performance can be enhanced by securing a portion having a large volume concentrically around the heat source. Since the top surface 13a of the heat sink member 13 of the vehicle lamp 10 is made flat, the first light source 11 and the first light source 11 and the first light source 11 and the first light source 11 are not partially chipped due to the step, compared to providing a step on the top surface 13a. It becomes easy to secure a concentric spherical portion having a large volume below each of the two light sources 12 . Therefore, in the vehicle lamp 10, the heat sink member 13 can secure a volume for heat transfer to each of the first light source 11 and the second light source 12. can be properly cooled.

In the vehicle lamp 10, the incident surface 16a of the first lens 16 has a lower lens surface 24 corresponding to the light reflected by the first reflecting surface 22 and a second reflecting surface 23 corresponding to the light reflected by the second reflecting surface 23. An upper lens surface 25 is provided. For this reason, the vehicle lamp 10 has a positional relationship between the optical path through which the reflected light from the first reflecting surface 22 passes and the optical path through which the reflected light from the second reflecting surface 23 passes between the first lens 16 and the reflector 14. The light distribution pattern LP for passing and the light distribution pattern HP for running can be superimposed and formed while increasing the degree of freedom. If the incident surface 16a of the first lens 16 is a single surface as in the prior art, the light path forming the light distribution pattern LP for passing near the rear focal point of the first lens 16 and the light distribution for running This is because the two light distribution patterns (LP, HP) do not overlap unless the optical path forming the pattern HP is set close to each other.

The vehicle lamp 10 of Example 1 can obtain the following effects.

The vehicle lamp 10 includes a first reflecting surface 22 that reflects light emitted from the first light source 11 to the first lens 16 , and a first reflecting surface 22 that reflects light emitted from the second light source 12 and passed through the second lens 17 . The reflector 14 is provided with a second reflecting surface 23 that reflects light to the lens 16 . In this manner, the vehicle lamp 10 has the second lens 17 have the function of causing the light from the second light source 12 to travel to the second reflecting surface 23, and the function of reflecting the light toward the first lens 16 side. is given to the second reflecting surface 23 . Therefore, in the vehicle lamp 10, the second lens 17 can be made small. It is possible to prevent the second lens 17 from blocking the light that is emitted, reflected by the first reflecting surface 22 and directed to the first lens 16 . Accordingly, in the vehicle lamp 10, the shape of the member to which the first light source 11 and the second light source 12 are attached can be simplified. Further, in the vehicle lamp 10, the first light source 11 and the second light source 12 can be provided on a common substrate in which the substrates 20 and 21 are integrated.

A vehicle lamp 10 has a first light source 11 and a second light source 12 provided on an upper surface 13 a of a heat sink member 13 . Therefore, the vehicle lamp 10 does not need to provide a step on the upper surface 13a, so that the first light source 11 and the second light source 12 can be cooled appropriately.

In the vehicle lamp 10, the first lens 16 has a lower lens surface 24 on which the light reflected by the first reflecting surface 22 is incident, and an upper lens surface 25 on which the light reflected by the second reflecting surface 23 is incident. and are provided. For this reason, the vehicle lamp 10 has a positional relationship between the optical path through which the reflected light from the first reflecting surface 22 passes and the optical path through which the reflected light from the second reflecting surface 23 passes between the reflector 14 and the first lens 16. The light distribution pattern LP for passing and the light distribution pattern HP for running can be superimposed and formed while increasing the degree of freedom.

The vehicle lamp 10 forms a driving light distribution pattern HP by arranging a plurality of driving light distribution parts hp formed by light from the plurality of light source parts 12a of the second light source 12 in parallel in the width direction. . For this reason, the vehicular lamp 10 individually turns on and off each light source unit 12a of the appropriately cooled second light source 12, so that one of the plurality of light distribution units for driving hp can be distributed for driving in a specific direction. The light part hp can be partially extinguished, and the ADB function can be realized more appropriately.

The vehicle lamp 10 forms the second lens 17 with a cylindrical lens that extends in the width direction and has refractive power only in the optical axis direction. Therefore, the vehicular lamp 10 can form the running light distribution parts hp arranged in parallel in the width direction with the light from the respective light source parts 12a with a simple configuration, and the running light distribution pattern having the ADB function can be formed. HP can be formed.

Therefore, the vehicle lamp 10 of Example 1 as the vehicle lamp 10 according to the present disclosure has the first light source 11 and the second light source while overlapping the passing light distribution pattern LP and the running light distribution pattern HP. 12 can be provided without steps.

Although the vehicle lamp of the present disclosure has been described above based on the first embodiment, the specific configuration is not limited to the first embodiment, and is outside the gist of the invention according to each claim. Design changes, additions, etc. are permitted unless

In the first embodiment, the function of ADB can be realized by not forming an arbitrary light distribution portion hp for running in the light distribution pattern for running HP. However, the vehicular lamp 10 reflects the light from the first light source 11 by the first reflecting surface 22 of the reflector 14 to form the light distribution pattern LP for passing light, and the light from the second light source 12 is reflected to the second light distribution pattern LP of the reflector 14 . 2 It is not limited to the configuration of the first embodiment as long as it is reflected by the reflecting surface 23 to form the light distribution pattern for running HP.

Moreover, in Example 1, the second lens 17 is a cylindrical lens. However, the second lens 17 is not limited to the configuration of the first embodiment as long as it corresponds to a plurality of (five in the first embodiment) light source sections 12a of the second light source 12 . As another example, for example, a plurality of lenses may be provided individually corresponding to each light source unit 12a, or a free-form surface lens having an entrance surface and an exit surface designed for each light source unit 12a may be provided. good. The free-form surface lens may be provided separately for each light source unit 12a, or may be integrated with the lens corresponding to each light source unit 12a.

REFERENCE SIGNS LIST 10 vehicle lamp 11 first light source 12 second light source 12a light source section 14 reflector 16 first lens 17 second lens 22 first reflecting surface 23 second reflecting surface 24 lower lens surface 25 upper lens surface HP running light distribution pattern hp Light distribution part for driving LP Light distribution pattern for passing

Claims (4)

a first light source that emits light forming a light distribution pattern for passing;
a second light source that is provided on the front side in the optical axis direction of the first light source and emits light that forms a light distribution pattern for running;
a reflector that reflects the light emitted from the first light source and the second light source;
a first lens that projects the light reflected by the reflector forward in the optical axis direction;
a second lens that causes the light emitted from the second light source to travel toward the reflector;
The first light source and the second light source are provided on the same plane parallel to the optical axis direction and arranged in the optical axis direction,
The reflector includes a first reflecting surface that reflects the light emitted from the first light source to the first lens, and a light emitted from the second light source provided on the front side of the first reflecting surface in the optical axis direction. and a second reflecting surface for reflecting light passing through the second lens toward the first lens. The first lens has a lower lens surface on which light reflected by the first reflecting surface is incident and an upper lens surface on which light reflected by the second reflecting surface is incident. The vehicle lamp according to claim 1. The second light source is formed by arranging a plurality of light source units in a width direction orthogonal to the optical axis direction and the vertical direction,
The light distribution pattern for running is formed by arranging a plurality of light distribution parts for running, which are formed by projecting light from each of the plurality of light source parts by the first lens, in parallel in the width direction. 3. The vehicular lamp according to claim 1, wherein each of the light distribution units for the vehicle can be turned on and off. 4. The vehicle lamp according to claim 3, wherein the second lens is formed of a cylindrical lens that extends in the width direction and has refractive power only in the optical axis direction.

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