JP2018092762A - Vehicular lighting fixture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicular lighting fixture capable of easily achieving various light distribution patterns.SOLUTION: A vehicular lighting fixture includes a first projection module 11a and a second projection module 11b for irradiating the front of a vehicle with respective light distribution patterns Xa, Xb. The first projection module 11a and the second projection module 11b respectively include: light sources 21a, 21b; reflection type digital light deflection device 31a, 31b which are constituted by arraying a plurality of tiltable mirror elements and which reflect the light radiated from the light sources 21a, 21b in reflection patterns corresponding to the tilted forms of the plurality of mirror elements; and projection optical systems 41a, 41b for radiating frontward the light reflected in the reflection patterns of the reflection type digital light deflection devices 31a, 31b as light distribution patterns Xa, Xb. The light distribution pattern Xa of the first projection module 11a and the light distribution pattern Xb of the second projection module 11b are overlapped with each other partially or entirely.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a vehicular lamp.

Conventionally, in a reflection type digital light deflecting device in which a plurality of tiltable mirror elements are arranged, light emitted from a light source is reflected according to the tilting state of the plurality of mirror elements, and forward as a light distribution pattern by a projection optical system There is known a vehicular lamp that irradiates the light (see Patent Document 1 below).
There is also known a vehicular lamp in which light from a plurality of light sources is reflected by a reflective digital light deflecting device and irradiated forward as a light distribution pattern by a projection optical system (see Patent Document 2 below).

Japanese Patent No. 4019939 International Publication No. WO2014 / 002630

However, for example, in the vehicular lamp of Patent Document 1, the reflection efficiency at the time of collecting and reflecting the light from the light source is likely to decrease, and the light intensity is likely to be insufficient. In addition, in the vehicular lamp of Patent Document 2, since the operating angle of each mirror element of the reflective digital light deflecting device is set, the incident angle and the reflection angle are specified, and only light in a predetermined direction from the light source can be used. It was not easy to obtain a sufficient luminous intensity.
For this reason, in a vehicle lamp using a conventional reflective digital light deflecting device, there is a limit in forming a light distribution pattern having sufficient illuminance and setting the illuminance level in each region of the light distribution pattern. .

  The present invention has been proposed in view of such conventional circumstances, and an object thereof is to provide a vehicular lamp that has sufficient illuminance and can easily realize various light distribution patterns.

  In order to achieve the above object, a vehicular lamp according to an aspect includes a first projection module and a second projection module that irradiate the front of a vehicle with respective light distribution patterns, and the first projection module and the first projection module are provided. Each of the two projection modules is configured by arranging a light source and a plurality of tiltable mirror elements, and reflects light irradiated from the light source with a reflection pattern according to a tilt mode of the plurality of mirror elements. And a projection optical system that irradiates the light reflected by the reflection pattern of the reflective digital light deflector forward as the light distribution pattern, and the first projection module includes the projection optical system. The light distribution pattern and the light distribution pattern of the second projection module are vehicle lamps that overlap each other over the entire projection range along a uniaxial direction.

According to the vehicle lamp described above, the first projection module and the second projection module each have a light source, a reflective digital light deflecting device, and a projection optical system, and the light distribution pattern of the first projection module and The light distribution pattern of the two projection modules is configured to overlap.
Therefore, the reflective digital light deflector can change the shape of the illumination area of the vehicular lamp, and the illuminance can be increased by overlapping multiple light distribution patterns, so the illuminance at each part of the illumination area can be greatly changed. is there.
Therefore, various light distribution patterns having different shapes and illuminances can be formed.
In addition, since the entire projection range along the uniaxial direction in the light distribution patterns of both projection modules is overlapped with each other, the first projection module and the second projection module can be easily configured in the same manner. For example, the same projection optical system is used. It is also possible. Therefore, the parts can be shared, and light distribution patterns having the same shape and different illuminance can be formed with a small number of parts. Accordingly, it is possible to provide a vehicular lamp that can realize various light distribution patterns with an inexpensive configuration.

  The vehicular lamp according to one aspect includes a first projection module and a second projection module that irradiate the front of the vehicle with respective light distribution patterns, and the first projection module and the second projection module are respectively A reflective digital light deflector configured by arranging a light source and a plurality of tiltable mirror elements, and reflecting light emitted from the light source with a reflection pattern according to a tilt mode of the plurality of mirror elements; A projection optical system that irradiates the light reflected by the reflection pattern of the reflective digital light deflection apparatus forward as the light distribution pattern, and the light distribution pattern of the first projection module and the second The light distribution pattern of the projection module is a vehicular lamp in which projection ranges along one axial direction are shifted from each other and partially overlap each other.

According to the above-described vehicle lamp, the projection range along the uniaxial direction of the light distribution pattern of the first projection module and the light distribution pattern of the second projection module is shifted from each other and partially overlapped. Many light distribution patterns can be formed by forming regions with high and low illuminance in the light distribution pattern of the entire lamp.
For this reason, even if the first projection module and the second projection module have the same configuration, many light distribution patterns can be formed. Therefore, by sharing the components, it is possible to form more light distribution patterns with fewer types of components.

  The vehicular lamp according to one aspect includes a first projection module and a second projection module that irradiate the front of the vehicle with respective light distribution patterns, and the first projection module and the second projection module are respectively A reflective digital light deflector configured by arranging a light source and a plurality of tiltable mirror elements, and reflecting light emitted from the light source with a reflection pattern according to a tilt mode of the plurality of mirror elements; A projection optical system that irradiates forward the light reflected by the reflection pattern of the reflective digital light deflector as the light distribution pattern, and is arranged in one axial direction of the light distribution pattern of the first projection module. The along-projection range is a vehicular lamp that includes a projection range along the one-axis direction of the light distribution pattern of the second projection module.

  According to the vehicle lamp described above, the projection range along the uniaxial direction of the light distribution pattern of the first projection module includes the projection range along the uniaxial direction of the light distribution pattern of the second projection module. The illuminance of a part of the light distribution pattern formed by the projection module can be increased and the illuminance of other parts can be decreased.

  The vehicular lamp according to one aspect includes a first projection module and a second projection module that irradiate the front of the vehicle with respective light distribution patterns, and the first projection module and the second projection module are respectively A reflective digital light deflector configured by arranging a light source and a plurality of tiltable mirror elements, and reflecting light emitted from the light source with a reflection pattern according to a tilt mode of the plurality of mirror elements; A projection optical system that irradiates the light reflected by the reflection pattern of the reflective digital light deflecting device forward as the light distribution pattern, and the first projection module and the second projection module The light distribution pattern is asymmetrical with respect to the front of the vehicle, and the projection range along the horizontal direction of the light distribution pattern of the first projection module is It encompasses the horizontal direction along the projection range of the light distribution pattern of the second projection module, vehicle light.

According to the above-described vehicle lamp, the light distribution patterns of the first and second projection modules are arranged close to one side in the horizontal direction. In general, when a vehicular lamp is mounted on a vehicle, light emitted from the vicinity of an end portion on the inner side of the vehicle is likely to be hindered by other members (body and decorative parts of the vehicular lamp). According to the above-described configuration, in order to form a left-right asymmetric composite light distribution pattern, it is possible to effectively use the light to be irradiated by narrowing the light distribution angle on the vehicle inner side (left direction) that is easily disturbed by other members. it can.
In addition, such a vehicular lamp, in which a pair of vehicular lamps in which the composite light distribution pattern is reversed left and right is mounted on both the left and right sides of the headlamp of the vehicle, respectively, A symmetric orientation pattern can be realized.

  In the above-described vehicular lamp, the tilting mode of the mirror element of the reflective digital light deflector is controlled based on an object detection unit that detects an object existing in front of the vehicle and a detection status of the object detection unit. And a controller that forms the light distribution pattern of the first projection module and the light distribution pattern of the second projection module.

  According to the vehicle lamp described above, since the control unit that forms the light distribution pattern based on the detection status of the object detection unit is provided, various light distribution patterns can be selected according to the object existing in front of the vehicle. The light distribution suitable for the surrounding situation can be achieved.

  ADVANTAGE OF THE INVENTION According to this invention, the vehicle lamp which can implement | achieve various light distribution patterns easily can be provided.

It is the schematic of the vehicle lamp which concerns on 1st Embodiment. It is a figure explaining the light distribution state of the 1st projection module of the vehicular lamp which concerns on 1st Embodiment, and a 2nd projection module, (a) is a figure explaining arrangement | positioning, (b) is a light distribution pattern. The figure to explain, (c) is a graph which shows the illumination intensity of a light distribution pattern. It is a figure explaining the light distribution state of the 1st projection module of the vehicular lamp which concerns on 2nd Embodiment, and a 2nd projection module, (a) is a figure explaining arrangement | positioning, (b) is a light distribution pattern. The figure to explain, (c) is a graph which shows the illumination intensity of a light distribution pattern. It is a figure explaining the light distribution state of the 1st projection module of the vehicular lamp which concerns on 3rd Embodiment, and a 2nd projection module, (a) is a figure explaining arrangement | positioning, (b) is a light distribution pattern. The figure to explain, (c) is a graph which shows the illumination intensity of a light distribution pattern. It is a figure explaining the light distribution state of the 1st projection module of the vehicular lamp which concerns on 4th Embodiment, and a 2nd projection module, (a) is a figure explaining arrangement | positioning, (b) is a light distribution pattern. The figure to explain, (c) is a graph which shows the illumination intensity of a light distribution pattern.

Hereinafter, a vehicular lamp as an embodiment will be described with reference to the drawings.
In the drawings used in the following description, in order to make the features easy to understand, portions that become features may be shown in an enlarged manner for convenience, and the dimensional ratios and the like of each component are not always the same as actual.

(First embodiment)
FIG. 1 is a block diagram showing an outline of a vehicular lamp 10 according to the first embodiment.
2A and 2B are diagrams for explaining the light distribution state of the first projection module 11a and the second projection module 11b of the vehicular lamp 10 according to the first embodiment, and FIG. ) Is a diagram for explaining the light distribution patterns Xa and Xb and the composite light distribution pattern X, and (c) is a graph showing the illuminance of the composite light distribution pattern X. FIG.

  The vehicular lamp 10 of the present embodiment is a variable light distribution lamp that automatically changes the light distribution pattern according to the position of an object ahead such as an oncoming vehicle. As shown in FIG. 1, the vehicular lamp 10 includes a first projection module 11a and a second projection module 11b that irradiate the front of the vehicle with respective light distribution patterns Xa and Xb, and a control device that controls them. 13 and an imaging device 15 that detects the situation in front and transmits it to the control device 13.

  As shown in FIGS. 1 and 2A, the first projection module 11a and the second projection module 11b reflect the light from the light sources 21a and 21b and the light sources 21a and 21b with various reflection patterns, respectively. Reflective digital light deflecting devices (DMDs) 31a and 31b, and projection optical systems 41a and 41b for irradiating the front virtual screen S with light from the reflective digital light deflecting devices 31a and 31b ing.

The light sources 21a and 21b are for a light source having light source bodies 23a and 23b for emitting light, and a lens for irradiating the reflection control surfaces of the reflection type digital light deflectors 31a and 31b with light from the light source bodies 23a and 23b. And optical systems 25a and 25b.
The light source bodies 23a and 23b may be devices such as LEDs that emit visible light, or may be devices that emit invisible light.
Since the light source optical systems 25a and 25b effectively use the entire reflection control surface of the reflection type digital light deflecting devices 31a and 31b, it is preferable to set the condensing size to the size of the reflection control surface. Further, it is preferable that the reflection control surfaces of the reflection type digital light deflectors 31a and 31b can be irradiated as uniformly as possible.

The reflection type digital light deflecting devices 31a and 31b have a reflection control surface configured by arranging a plurality of tiltable mirror elements. Various reflection patterns can be formed on the reflection control surface by controlling the tilt angle of each of the mirror elements by the signal from the control device 13 to the projection side or the light shielding side. The light when each mirror element tilts to the light shielding side is shielded by the light shielding members 32a and 32b (see FIG. 1).
In the reflection type digital light deflecting devices 31a and 31b, the light emitted from the light sources 21a and 21b can be reflected toward the projection optical systems 41a and 41b with a reflection pattern corresponding to the tilting mode of the plurality of mirror elements.

The projection optical systems 41a and 41b have a projection lens and the like. The projection optical systems 41a and 41b can irradiate the light reflected by the reflection patterns of the reflection type digital light deflecting devices 31a and 31b forward as light distribution patterns Xa and Xb.
Note that the lens surfaces of the projection optical systems 41a and 41b shown in FIG. 2A are schematically described, and are different from the actual curved shape of the lens surfaces.

  The imaging device 15 includes an object detection unit 52 that detects the position and size of an object existing in front of the vehicle by imaging and processing the front of the vehicle and transmits the detection status to the control unit 51. doing.

  The control device 13 includes a memory 53 in which control information of various light distribution patterns and the like are set in advance, a control unit 51 that generates a control signal based on information from the memory 53 and a signal from the imaging device 15, and a control signal. And a drive unit 54 for driving the reflection type digital light deflection devices 31a and 31b.

  The control device 13 controls the tilting mode of each mirror element of the reflection type digital light deflection devices 31a and 31b based on the detection status of the object detection unit 52, and thereby the light distribution pattern Xa of the first projection module 11a and The light distribution pattern Xb of the second projection module 11b can be formed.

In the vehicular lamp 10 of the present embodiment, as shown in FIGS. 2A and 2B, the first projection module 11a and the second projection module 11b have the same configuration. That is, the light sources 21a and 21b, the reflection type digital light deflecting devices 31a and 31b, and the projection optical systems 41a and 41b of the first projection module 11a and the second projection module 11b have the same configuration. Therefore, the light distribution pattern Xa formed by the first projection module 11a and irradiated forward, and the light distribution pattern Xb formed by the second projection module 11b and irradiated forward are on the front virtual screen S (or On the road surface).
The first projection module 11a and the second projection module 11b emit light in the same direction. Accordingly, the light emitted from the first projection module 11a and the second projection module 11b overlap each other on the front virtual screen S (or on the road surface).
Therefore, the light distribution pattern Xa of the first projection module 11a and the light distribution pattern Xb of the second projection module 11b overlap each other in the entire projection range along the vertical direction V and the horizontal direction H, and the composite light distribution pattern X Form.

  As shown in FIG. 2B, in the vehicular lamp 10, for example, the first projection module 11a and the second projection module 11b have a horizontal light distribution angle of ± 20 ° and a vertical light distribution angle. Is set to ± 3 ° (upper 4 °, lower 2 °), and light distribution patterns Xa and Xb are irradiated, respectively. In this case, a composite light distribution pattern X having a horizontal light distribution angle of ± 20 ° and a vertical light distribution angle of ± 3 ° is formed. Further, the composite light distribution pattern X has a higher illuminance as a whole than the light distribution patterns Xa and Xb.

  According to the vehicular lamp 10 of the present embodiment, the light distribution pattern Xa of the first projection module 11a and the light distribution pattern Xb of the second projection module 11b are configured to overlap each other. Therefore, the shape of the irradiation area of the vehicular lamp 10 can be changed by the reflection type digital light deflecting devices 31a and 31b, and the illuminance can be increased by overlapping the plurality of light distribution patterns Xa and Xb. Thereby, the illuminance distribution of each part in the composite light distribution pattern X can be freely changed.

FIG. 2C is a diagram illustrating the illuminance distribution of the composite light distribution pattern X of the vehicular lamp 10.
The dashed-dotted line and the continuous line in FIG. 2C are a composite light distribution pattern X of the illuminance distribution of the vehicular lamp 10 that can be realized by different control.

  A dashed line in FIG. 2C is a composite light distribution pattern X having a uniform illuminance distribution as a whole. The combined light distribution pattern X of the alternate long and short dash line can be realized by tilting all the mirror elements of the reflection type digital light deflecting devices 31a and 31b to the projection side in the first and second projection modules 11a and 11b.

The solid line in FIG. 2C is a composite light distribution pattern X of illuminance distribution that forms a high illuminance region (high illuminance region) in the center. The solid-line composite light distribution pattern X is a high-speed mirror element on the projection side and the light-shielding side in one or both of the reflection type digital light deflection devices 31a and 31b of the first and second projection modules 11a and 11b. This can be realized by switching with and adjusting the tilt time ratio. More specifically, in the reflective digital light deflecting devices 31a and 31b, this can be realized by gradually reducing the ratio of the time to tilt the mirror element toward the projection side as it moves away from the center along the horizontal direction. Since the light is not projected forward at the moment when the mirror element is switched to the light shielding side, a dark portion can be formed inside the composite light distribution pattern X according to the ratio of the tilt time.
According to the solid-line composite light distribution pattern X, light distribution that is easy to see for the driver can be realized by forming a high illuminance region in the center.

  When the vehicular lamp 10 of the present embodiment is used as an ADB (Adaptive Driving Beam), the reflective digital light deflecting device 31a of the first and second projection modules 11a and 11b. , 31b is continuously tilted toward the light shielding side, thereby forming a non-irradiation region in the composite light distribution pattern X.

According to the vehicular lamp 10 of the present embodiment, the entire projection range along the uniaxial direction (the biaxial direction of the horizontal direction H and the vertical direction V in the present embodiment) in the light distribution patterns Xa, Xb of both projection modules 11a, 11b. Therefore, it is easy to configure the first projection module 11a and the second projection module 11b in the same manner. For example, the same projection optical systems 41a and 41b can be used for the first projection module 11a and the second projection module 11b.
Therefore, the parts can be shared, and the vehicular lamp 10 that has the same light distribution pattern shape and can greatly change the illuminance can be formed with fewer kinds of parts. Thereby, various composite light distribution patterns X can be realized with an inexpensive configuration.

  Moreover, according to the vehicle lamp 10 of this embodiment, the control part 51 which forms the light distribution pattern Xa, Xb based on the detection condition of the object detection part 52 is provided. Therefore, various composite light distribution patterns X can be selected and realized according to the position and size of an object existing in front of the vehicle, and light distribution suitable for the surrounding situation can be performed.

  In the present embodiment, the light source 21a of the first projection module 11a and the light source 21b of the second projection module 11b have the same structure, but it is also possible to use light sources having different emission luminances. . Thereby, the illumination intensity of the composite light distribution pattern X can be changed in multiple stages.

(Second Embodiment)
FIG. 3 is a diagram for explaining the light distribution state of the first projection module 111a and the second projection module 111b of the vehicular lamp 110 according to the second embodiment, and (a) is a diagram for explaining the arrangement; ) Is a diagram for explaining the light distribution patterns Xa and Xb and the composite light distribution pattern X, and (c) is a graph showing the illuminance of the composite light distribution pattern X. FIG.

Similarly to the first embodiment, the vehicular lamp 110 according to the present embodiment includes a first projection module 111a and a second projection module 111b, a control device 13 that controls them, and an imaging device 15. Yes. In addition, about the component of the same aspect as the above-mentioned embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.
The control device 13 and the imaging device 15 of this embodiment are the same as those of the first embodiment except that various light distribution patterns preset in the memory 53 and the like are different.

  As shown in FIG. 3A, the first projection module 111a and the second projection module 111b are respectively similar to the first embodiment in the light sources 21a and 21b and the reflection type digital light deflectors 31a and 31b. Projection optical systems 141a and 141b. In addition, the light sources 21a and 21b and the reflective digital light deflectors 31a and 31b of the present embodiment have the same configuration as that of the first embodiment.

In the present embodiment, the projection optical systems 141a and 141b of the first projection module 111a and the second projection module 111b are made of the same member. However, the projection optical systems 141a and 141b have different light distribution directions in the first projection module 111a and the second projection module 111b. That is, the light from the first projection module 111a and the light from the second projection module 111b are set to be partially overlapped and irradiated.
Note that the lens surfaces of the projection optical systems 141a and 141b shown in FIG. 3A are schematically described, and are different from the actual curved shape of the lens surfaces.

In such a vehicular lamp 110, the light distribution pattern Xa of the first projection module 111a and the light distribution pattern Xb of the second projection module 111b are partially overlapped with each other because the projection ranges along the horizontal direction H are shifted from each other. Thus, the composite light distribution pattern X is formed.
In this composite light distribution pattern X, the light distribution required for the vehicular lamp 110 is satisfied by shifting and superimposing the light distribution patterns Xa and Xb. In other words, a distribution is realized in which the center is brightest and the luminous intensity decreases rapidly toward the end. A smooth mountain-shaped light distribution pattern can be formed by dimming light under the control of the reflective digital light deflectors 31a and 31b.

As shown in FIG. 3 (b), in the vehicular lamp 110, for example, the first projection module 111a has a light distribution angle of 20 ° to the left and 5 ° to the right and ± 3 ° to the top and bottom (up to 4 ° and down to 2 °). Irradiate the light distribution pattern Xa. On the other hand, the second projection module 111b irradiates the light distribution pattern Xb with a light distribution angle of 5 ° to the left and 20 ° to the right and ± 3 ° (upper 4 °, lower 2 °).
In this case, the light distribution pattern Xa of the first projection module 111a and the light distribution pattern Xb of the second projection module 111b overlap each other in the range of the light distribution angle of ± 5 ° in the left-right direction from the center. X is formed. In the composite light distribution pattern X, the illuminance is increased in the overlapping region. That is, the luminous intensity distribution necessary for the vehicular lamp 110 can be satisfied by combining the two light distribution patterns Xa and Xb.

  At that time, the light distribution angles of the light distribution patterns Xa and Xb of the projection modules 111a and 111b can be set by the magnification ratio of the lenses of the projection optical systems 141a and 141b, specifically the focal length. When the light distribution angle of each light distribution pattern Xa, Xb of each projection module 111a, 111b is 25 ° and the light distribution angle of the composite light distribution pattern X of both projection modules 111a, 111b is ± 20 °, each projection module The focal lengths in the horizontal direction in the projection optical systems 141a and 141b of 111a and 111b are set longer than the focal length when the light distribution angle is set to ± 20 ° by a single projection optical system.

  According to the vehicle lamp 110 of the present embodiment, the light distribution pattern Xa of the first projection module 111a and the light distribution pattern Xb of the second projection module 111b are along one axial direction (horizontal direction H in the present embodiment). The projection ranges are shifted from each other so that a part of them is overlapped. For this reason, various composite light distribution patterns X can be formed by forming regions with high and low illuminance in the composite light distribution pattern X of the vehicle lamp 110 as a whole.

  Moreover, the vehicular lamp 110 according to the present embodiment can be configured with the first projection module 111a and the second projection module 111b from the same member. Therefore, various composite light distribution patterns X can be realized with an inexpensive configuration.

  Further, according to the present embodiment, each of the projection modules 111a and 111b has the reflection type digital light deflection devices 31a and 31b independently of each other. Accordingly, the shape of the irradiation region of the vehicular lamp 110 can be changed, and the illuminance distribution of each part in the composite light distribution pattern X can be freely changed by overlapping the plurality of light distribution patterns Xa and Xb. Is possible.

FIG. 3C is a diagram illustrating the illuminance distribution of the composite light distribution pattern X of the vehicular lamp 110.
The dashed line and the solid line in FIG. 3C are a composite light distribution pattern X of the illuminance distribution of the vehicular lamp 110 that can be realized by different controls.

  In the first and second projection modules 111a and 111b, the one-dot chain line combined light distribution pattern X in FIG. 3C tilts all the mirror elements of the respective reflection type digital light deflectors 31a and 31b to the projection side. This can be achieved.

  The composite light distribution pattern X shown by the solid line in FIG. 3C projects a mirror element in one or both of the reflection type digital light deflecting devices 31a and 31b of the first and second projection modules 111a and 111b. This can be realized by switching between the side and the light-shielding side at high speed and adjusting the tilt time ratio.

  The difference between the area of the region surrounded by the alternate long and short dash line and the area of the region surrounded by the solid line corresponds to the amount of light abandoned by tilting the mirror element to the light shielding side in order to realize the solid light distribution pattern. According to this embodiment, the amount of light abandoned to form a central high illuminance region by superimposing the light distribution patterns Xa and Xb of the first and second projection modules 111a and 111b can be suppressed, and a highly efficient composite distribution can be achieved. The light pattern X can be realized.

(Third embodiment)
FIG. 4 is a diagram for explaining the light distribution state of the first projection module 211a and the second projection module 211b of the vehicular lamp 210 according to the third embodiment, and (a) is a diagram for explaining the arrangement; ) Is a diagram for explaining the light distribution patterns Xa and Xb and the composite light distribution pattern X, and (c) is a graph showing the illuminance of the composite light distribution pattern X. FIG.

Similarly to the first embodiment, the vehicular lamp 210 of the present embodiment includes a first projection module 211a and a second projection module 211b, a control device 13 that controls these, and an imaging device 15. Yes. In addition, about the component of the same aspect as the above-mentioned embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.
The control device 13 and the imaging device 15 are the same as the above-described embodiments except that various light distribution patterns set in advance in the memory 53 and the like are different.

  As shown in FIG. 4A, the first projection module 211a and the second projection module 211b are respectively similar to the first embodiment in the light sources 21a and 21b and the reflection type digital light deflectors 31a and 31b. Projection optical systems 241a and 241b. Further, the light sources 21a and 21b and the reflection type digital light deflecting devices 31a and 31b of the present embodiment have the same configuration as that of the above-described embodiment.

In the present embodiment, the projection optical systems 241a and 241b of the first projection module 211a and the second projection module 211b have different magnifications. More specifically, the horizontal focal length of the projection optical system 241a of the first projection module 211a is set smaller than the horizontal focal length of the projection optical system 241b of the second projection module 211b. Thereby, the projection range along the horizontal direction H of the light distribution pattern Xa formed by the first projection module 211a is projected along the horizontal direction H of the light distribution pattern Xb in the projection optical system 241b of the second projection module 211b. It is configured to be wider than the range.
In addition, the projection optical system 241a of the first projection module 211a and the projection optical system 241b of the second projection module 211b are distributed toward a common center. For this reason, the projection range of the projection optical system 241b of the second projection module 211b is included in the projection range of the projection optical system 241a of the first projection module 211a.
In addition, the lens surfaces of the projection optical systems 241a and 241b shown in FIG. 4A are schematically described, and are different from the actual curved shape of the lens surfaces. More specifically, in FIG. 4A, the lens surfaces of the projection optical systems 241a and 241b are schematically shown so that the curvatures of the lens surfaces in the vertical direction are different from each other. However, the lens surfaces of the projection optical systems 241a and 241b of the present embodiment have different curvatures in the left-right direction.

In such a vehicular lamp 210, light from the first projection module 211a is distributed over a wide projection range along the horizontal direction H, and light from the second projection module 211b is transmitted from the first projection module 211a. Light is distributed in the form of a spot at the center of the projection range.
Therefore, it is possible to satisfy the luminous intensity distribution necessary for the vehicular lamp 210 in which the center is the brightest and the luminous intensity rapidly decreases toward the end.

As shown in FIG. 4B, in the vehicular lamp 210, for example, the first projection module 211a has a horizontal light distribution angle of ± 20 ° and a vertical light distribution angle of ± 3 ° (up 4 °). Then, the light distribution pattern Xa is irradiated. On the other hand, the second projection module 211b irradiates the light distribution pattern Xb with the light distribution angle in the left-right direction being ± 5 ° and the light distribution angle in the vertical direction being ± 3 °.
In this case, the light distribution pattern Xa of the first projection module 211a and the light distribution pattern Xb of the second projection module 211b overlap each other within a range of the light distribution angle of ± 5 ° in the left-right direction to form a composite light distribution pattern X. To do. In the composite light distribution pattern X, the illuminance is increased in the overlapping region. That is, the light intensity distribution required for the vehicular lamp 210 can be satisfied by combining the two light distribution patterns Xa and Xb.

  The light distribution angles of the light distribution patterns Xa and Xb of the projection modules 211a and 211b are set according to the magnification ratio of the lenses of the projection optical systems 241a and 241b, specifically the focal length. By setting the focal distance of the projection optical system 241b of the second projection module 211b to be larger than the focal distance of the projection optical system 241a of the first projection module 211a, the second projection module 211b is set at the center of the composite light distribution pattern X. The light is irradiated.

  According to the vehicular lamp 210 of the present embodiment, the light distribution of the second projection module 211b is within the projection range along the uniaxial direction (the horizontal direction H in the present embodiment) of the light distribution pattern Xa of the first projection module 211a. A projection range along one axis direction of the pattern Xb (horizontal direction H in the present embodiment) is included. Therefore, the illuminance of a part of the light distribution pattern Xa formed by the first projection module 211a can be locally increased as compared with other parts.

  Further, according to the present embodiment, each of the projection modules 211a and 211b has the reflection type digital light deflection devices 31a and 31b independently of each other. Accordingly, the shape of the irradiation region of the vehicular lamp 210 can be changed, and the illuminance distribution of each part in the composite light distribution pattern X can be freely changed by overlapping a plurality of light distribution patterns Xa and Xb. Is possible.

FIG. 4C is a diagram illustrating the illuminance distribution of the composite light distribution pattern X of the vehicular lamp 210.
An alternate long and short dash line and a solid line in FIG. 4C are a composite light distribution pattern X of the illuminance distribution of the vehicular lamp 210 that can be realized by different controls.

  In the first and second projection modules 211a and 211b, the combined light distribution pattern X indicated by the alternate long and short dash line in FIG. 4C tilts all mirror elements of the reflection type digital light deflectors 31a and 31b toward the projection side. This can be achieved.

  The composite light distribution pattern X shown by a solid line in FIG. 4C projects a mirror element in one or both of the reflection type digital light deflecting devices 31a and 31b of the first and second projection modules 211a and 211b. This can be realized by switching between the side and the light-shielding side at high speed and adjusting the tilt time ratio.

  According to the present embodiment, the amount of light abandoned is suppressed by superimposing the light distribution pattern Xb of the second projection module 211b on the light distribution pattern Xa of the first projection module 211a corresponding to the central high illumination area. And a highly efficient composite light distribution pattern X can be realized. In addition, according to the present embodiment, it is possible to further increase the illuminance in the high illuminance region as compared with the second embodiment.

(Fourth embodiment)
FIG. 5 is a diagram for explaining the light distribution state of the first projection module 311a and the second projection module 311b of the vehicular lamp 310 according to the fourth embodiment, and (a) is a diagram for explaining the arrangement. ) Is a diagram for explaining the light distribution patterns Xa and Xb and the composite light distribution pattern X, and (c) is a graph showing the illuminance of the composite light distribution pattern X. FIG.

Similarly to the third embodiment, the vehicular lamp 310 of the present embodiment includes a first projection module 311a and a second projection module 311b, a control device 13 that controls these, and an imaging device 15. Yes. In addition, about the component of the same aspect as the above-mentioned embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.
The control device 13 and the imaging device 15 are the same as the above-described embodiments except that various light distribution patterns set in advance in the memory 53 and the like are different.

As shown in FIG. 5A, the first projection module 311a and the second projection module 311b are respectively similar to the third embodiment in that the light sources 21a and 21b and the reflection type digital light deflectors 31a and 31b are respectively. Projection optical systems 341a and 341b.
This embodiment has the same configuration as that of the third embodiment except that the size and position of the light distribution pattern Xb formed by the first and second projection modules 311a and 311b are different.

  In the present embodiment, the projection range of the projection optical system 341a in the first projection module 311a is shifted from the center on one side in the horizontal direction. Further, the projection range along the horizontal direction H of the projection optical system 341b in the second projection module 311b is wider than that in the third embodiment, and the projection direction is shifted from the center to one side in the horizontal direction. That is, the light distribution patterns Xa and Xb of the first and second projection modules 311a and 311b are asymmetrical with respect to the front of the vehicle. The projection range along the horizontal direction of the light distribution pattern Xa of the first projection module 311a includes the projection range along the horizontal direction of the light distribution pattern of the second projection module 311b. As a result, the high illuminance region of the composite light distribution pattern X obtained by superimposing the light distribution patterns Xa and Xb of the first and second projection modules 311a and 311b is shifted to one side in the horizontal direction.

  In such a vehicular lamp 310, the light from the first projection module 311a is distributed over a wide range along the horizontal direction H, and the light from the second projection module 311b is projected from the first projection module 311a. Light is distributed to a range close to one side along the horizontal direction H of the range. Therefore, it is possible to form a light distribution pattern with improved illuminance in a range close to one side in a predetermined projection range.

As shown in FIG. 5B, in the vehicular lamp 310, for example, the first projection module 311a has a left and right light distribution angle of 10 ° to the left and 20 ° to the right, and a vertical light distribution angle of ± 3 ° ( Then, the light distribution pattern Xa is irradiated. On the other hand, the second projection module 311b irradiates the light distribution pattern Xb in which the light distribution angle in the left-right direction is 5 ° to the left and 10 ° to the right, and the light distribution angle in the vertical direction is ± 3 °.
In this case, the light distribution pattern Xa of the right-side first projection module 311a and the light distribution pattern Xb of the right-side second projection module 311b included therein overlap each other to form a composite light distribution pattern X. . In the composite light distribution pattern X, the illuminance is increased in the overlapping region. That is, the two light distribution patterns Xa and Xb can be combined to form a composite light distribution pattern X having a locally high illuminance region and asymmetrical to the left and right.

  According to the vehicle lamp 310 of the present embodiment, the light distribution pattern Xb of the second projection module 311b is uniaxially (horizontal direction H in the present embodiment) with respect to the light distribution pattern Xa of the first projection module 311a. It is arranged close to one side along. Therefore, the illuminance at the position near one side of the composite light distribution pattern X irradiated by the vehicular lamp 310 can be easily improved. Thereby, the illuminance of various areas in the composite light distribution pattern X of the vehicular lamp 310 can be easily increased, and a wide area with high illuminance can be provided.

  Further, according to the present embodiment, each of the projection modules 311a and 311b has the reflection type digital light deflection devices 31a and 31b independently of each other. Accordingly, the shape of the irradiation region of the vehicular lamp 310 can be changed, and the illuminance distribution of each part in the composite light distribution pattern X can be freely changed by superimposing a plurality of light distribution patterns Xa and Xb. Is possible.

  The vehicular lamp 310 of the present embodiment is used as a headlamp mounted on the right side of the vehicle. In general, when a vehicular lamp is mounted on a vehicle, light emitted from the vicinity of an end portion on the inner side of the vehicle is likely to be hindered by other members (body and decorative parts of the vehicular lamp). According to the present embodiment, in order to form the left-right asymmetric composite light distribution pattern X, the light distribution angle on the vehicle inner side (left direction) that is likely to be obstructed by other members is narrowed to effectively use the light to be irradiated. Can do. In addition, it is preferable to mount the other vehicle lamp with a left-right symmetric structure with this embodiment on the left side of the vehicle. In this case, the composite light distribution pattern of the other vehicle lamps mounted on the left side of the vehicle is symmetrical to the composite light distribution pattern X of the vehicle lamp 310 mounted on the right side. The composite light distribution patterns projected from the left and right vehicle lamps 310 overlap each other in front of the vehicle, and as a result, a symmetrical light distribution pattern can be realized.

  Although various embodiments of the present invention have been described above, each configuration in each embodiment and combinations thereof are examples, and addition, omission, replacement, and configuration of configurations are within the scope without departing from the spirit of the present invention. Other changes are possible. Further, the present invention is not limited by the embodiment.

For example, in the above description, the vehicular lamps 10, 110, 210, and 310 having two projection modules have been described. However, the present invention can be applied to a vehicular lamp having three or more projection modules. is there.
Further, in each of the above embodiments, the case where the light distribution patterns Xa and Xb have the same vertical light distribution angle is exemplified. However, the light distribution angles may be changed in the vertical direction as in the horizontal direction. In this case, the composite light distribution pattern X having different illuminance distributions in the vertical direction can be formed.

10, 110, 210, 310 ... Vehicle lamps 11a, 111a, 211a, 311a ... First projection module 11b, 111b, 211b, 311b ... Second projection module 13 ... Control device 15 ... Imaging devices 21a, 21b ... Light source 23a, 23b ... light source bodies 25a, 25b ... light source optical systems 31a, 31b ... reflective digital light deflectors 32a, 32b ... light shielding members 41a, 41b, 141a, 141b, 241a, 241b, 341a, 341b ... projection optical systems DESCRIPTION OF SYMBOLS 51 ... Control part 52 ... Object detection part 53 ... Memory 54 ... Drive part Xa, Xb ... Light distribution pattern X ... Compound light distribution pattern

Claims (5)

A first projection module and a second projection module for irradiating the front of the vehicle with respective light distribution patterns;
The first projection module and the second projection module are respectively
A light source;
A reflective digital light deflector configured by arranging a plurality of tiltable mirror elements, and reflecting light emitted from the light source with a reflection pattern according to a tilt mode of the plurality of mirror elements;
A projection optical system that irradiates the light reflected by the reflection pattern of the reflective digital light deflector forward as the light distribution pattern, and
The light distribution pattern of the first projection module and the light distribution pattern of the second projection module overlap each other over the entire projection range along a uniaxial direction.
Vehicle lamp. A first projection module and a second projection module for irradiating the front of the vehicle with respective light distribution patterns;
The first projection module and the second projection module are respectively
A light source;
A reflective digital light deflector configured by arranging a plurality of tiltable mirror elements, and reflecting light emitted from the light source with a reflection pattern according to a tilt mode of the plurality of mirror elements;
A projection optical system that irradiates the light reflected by the reflection pattern of the reflective digital light deflector forward as the light distribution pattern, and
The light distribution pattern of the first projection module and the light distribution pattern of the second projection module are partially overlapped with each other because the projection ranges along one axis direction are shifted from each other.
Vehicle lamp. A first projection module and a second projection module for irradiating the front of the vehicle with respective light distribution patterns;
The first projection module and the second projection module are respectively
A light source;
A reflective digital light deflector configured by arranging a plurality of tiltable mirror elements, and reflecting light emitted from the light source with a reflection pattern according to a tilt mode of the plurality of mirror elements;
A projection optical system that irradiates the light reflected by the reflection pattern of the reflective digital light deflector forward as the light distribution pattern, and
The projection range along the one-axis direction of the light distribution pattern of the first projection module includes the projection range along the one-axis direction of the light distribution pattern of the second projection module.
Vehicle lamp. A first projection module and a second projection module for irradiating the front of the vehicle with respective light distribution patterns;
The first projection module and the second projection module are respectively
A light source;
A reflective digital light deflector configured by arranging a plurality of tiltable mirror elements, and reflecting light emitted from the light source with a reflection pattern according to a tilt mode of the plurality of mirror elements;
A projection optical system that irradiates the light reflected by the reflection pattern of the reflective digital light deflector forward as the light distribution pattern, and
The light distribution patterns of the first projection module and the second projection module are asymmetric with respect to the front of the vehicle,
The projection range along the horizontal direction of the light distribution pattern of the first projection module includes the projection range along the horizontal direction of the light distribution pattern of the second projection module.
Vehicle lamp. An object detection unit for detecting an object present in front of the vehicle;
Based on the detection status of the object detection unit, the tilting mode of the mirror element of the reflective digital light deflection apparatus is controlled, and the light distribution pattern of the first projection module and the second projection module A control unit for forming a light distribution pattern,
The vehicular lamp according to any one of claims 1 to 4.

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