JP2019192399A - Vehicular lighting tool - Google Patents

Abstract

To provide a vehicular lighting tool for, when including a two-dimentional light control device such as a DMD, achieving less blurred images to be projected or its compact figure, for example, from the viewpoint of improvement.SOLUTION: The vehicular lighting tool using a two-dimentional light control device 30 for controlling light to be projected includes a light source device 20, a relay optical part 40 for reflecting light from the light source device 20 toward the two-dimensional light control device 30, and a lens part 50 having at least two lenses formed of resin and combined together for projecting the light from the two-dimensional light control device 30 to the front side, the light source device 20 including a light source 21 having one light emission part 21B, a first lens 22A located on the side of the light source 21, and a second lens 22B located on the side of the relay optical part 40 further than the first lens 22A, each of the first lens 22A and the second lens 22B being a biconvex lens formed of resin.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a vehicular lamp.

Patent Document 1 discloses an image projection system using a MEMS mirror that can be used for a vehicle lamp (headlamp).
In this image projection system, a light pattern having a high central luminous intensity is formed, and an image is formed in the light pattern, thereby enabling image display.

JP 2017-211142 A

  By the way, when the light pattern for drawing an image has a high luminous intensity at the center and a low luminous intensity at the periphery, the image drawn in the light pattern with a low peripheral luminous intensity tends to be blurred.

  For this reason, for example, when the center of the light pattern is aligned with the position where the vertical reference line and the horizontal reference line intersect on the screen, the light pattern projected on the road surface near the vehicle is a peripheral low-luminance region Therefore, when an image such as a warning display is drawn there, the warning display may become blurred.

In recent years, since the demand for miniaturization of vehicle lamps has increased, it is also desirable to make the vehicle lamp compact when incorporating a configuration capable of projecting an image.
Therefore, when a vehicular lamp is provided with a two-dimensional light control device such as a DMD, there is still a point to be improved.

  The present invention has been made in view of such circumstances. For example, when a two-dimensional light control device such as a DMD is provided, the projected image is less blurred or downsized as a vehicular lamp. The object is to provide a vehicular lamp that has been improved from the viewpoint of being able to do so.

The present invention is grasped by the following composition in order to achieve the above-mentioned object.
(1) A vehicular lamp according to the present invention is a vehicular lamp that controls light projected by a two-dimensional light control device, and the vehicular lamp includes a light source device and light from the light source device in the two-dimensional light. A relay optical unit that reflects toward the light control device, and a lens unit that projects light from the two-dimensional light control device to the front side and combines two or more lenses formed of resin, and The light source device includes a light source having one light emitting unit, a first lens positioned on the light source side, and a second lens positioned on the relay optical unit side with respect to the first lens, and the first lens And the second lens is a biconvex lens formed of resin.

(2) The vehicular lamp according to the present invention is a vehicular lamp that controls light projected by a two-dimensional light control device, and the vehicular lamp includes a light source device and light from the light source device in the two-dimensional light. A relay optical unit that reflects toward the light control device, and a lens unit that projects light from the two-dimensional light control device to the front side and combines three or more lenses formed of glass, and The light source device includes a light source having one light emitting unit, a first lens positioned on the light source side, and a second lens positioned on the relay optical unit side with respect to the first lens, and the first lens And the second lens is a biconvex lens formed of resin.

(3) In the configuration of (1) or (2), the two-dimensional light control device is disposed on a rear side facing the lens unit, and the relay optical unit is viewed at a position in the front-rear direction. Arranged at a position between the two-dimensional light control device and the lens unit, and when viewed in the vertical direction, disposed above the light irradiated to enter the lens unit from the two-dimensional light control device The light source device is disposed at a position between the two-dimensional light control device and the lens unit when viewed in the front-rear direction, and the second lens is disposed in the two-dimensional direction when viewed in the vertical direction. The light control device is disposed so as to be lower than the light irradiated so as to enter the lens unit, and at least a part of the second lens is positioned above the lower end of the lens unit. Yes.

(4) In the configuration of (3), the vehicular lamp is located between the two-dimensional light control device and the second lens, and light emitted from the two-dimensional light control device is applied to the light source device. The two-dimensional light control device includes a light blocking unit that blocks incident light, and the two-dimensional light control device does not enter the lens unit toward the light blocking unit when performing control so that at least part of the light does not enter the lens unit. Irradiate light.

(5) In the configuration of (3) or (4), the relay optical unit has a reflecting surface that reflects light toward the light irradiation unit of the two-dimensional light control device, and the relay optical unit includes: When viewed in the vertical direction, at least a part of the reflecting surface is above the light irradiated so as to enter the lens unit from the two-dimensional light control device, and at least a part of the reflecting surface is It arrange | positions so that it may be located below the upper end of the said lens part.

(6) In the configuration of (5), the two-dimensional light control device is arranged such that the center of the light irradiation unit is positioned below the center of the lens unit when viewed in the vertical direction. .

(7) In the configuration of (5) or (6), the two-dimensional light control device is a digital micromirror device having a plurality of micromirrors that control the direction of light irradiation as the light irradiation unit.

  ADVANTAGE OF THE INVENTION According to this invention, when providing two-dimensional light control apparatuses, such as DMD, the vehicle lamp which improved from the viewpoint that there is little blur of the image projected, for example can be provided, for example, compact It is possible to provide a vehicular lamp that can be manufactured.

It is a top view of vehicles provided with a vehicular lamp of an embodiment concerning the present invention. It is a perspective view of the lamp unit of the embodiment according to the present invention. It is sectional drawing which shows the principal part of the lamp unit of embodiment which concerns on this invention. It is a figure for demonstrating the light distribution pattern on the screen which the lamp unit of embodiment which concerns on this invention forms.

DESCRIPTION OF EMBODIMENTS Hereinafter, a mode for carrying out the present invention (hereinafter referred to as “embodiment”) will be described in detail with reference to the accompanying drawings.
In addition, the same number or code | symbol is attached | subjected to the same element through the whole description of embodiment.

Further, in the embodiment and the drawings, unless otherwise specified, “front” and “rear” indicate “forward direction” and “reverse direction” of the vehicle 102, respectively, and “up”, “down”, “ “Left” and “Right” respectively indicate directions viewed from the driver who gets on the vehicle 102.
Needless to say, “upper” and “lower” are also “upper” and “lower” in the vertical direction, and “left” and “right” are also “left” and “right” in the horizontal direction.

FIG. 1 is a plan view of a vehicle 102 including a vehicle lamp according to an embodiment of the present invention.
As shown in FIG. 1, the vehicular lamp according to the embodiment of the present invention is a vehicular headlamp (101L, 101R) provided on each of the left and right front sides of a vehicle 102. Hereinafter, the vehicular lamp is simply referred to as a vehicular lamp. It describes.

  The vehicular lamp according to the present embodiment includes a housing (not shown) that opens to the front side of the vehicle and an outer lens (not shown) that is attached to the housing so as to cover the opening, and is formed by the housing and the outer lens. A lamp unit 1 (see FIG. 2) and the like are disposed in the lamp chamber.

FIG. 2 is a perspective view of the lamp unit 1 according to the embodiment of the present invention, and FIG. 3 is a cross-sectional view showing a main part of the lamp unit 1 according to the embodiment of the present invention.
In addition, FIG. 3 is a cross-sectional view showing the main part when the lens unit 50 of the lamp unit 1 is cut in the front-rear direction at the center position in the left-right direction, and shows only the parts necessary for the description of the configuration. The other parts are not shown.

  As shown in FIG. 2, the lamp unit 1 includes a heat sink 10, a light source device 20, a two-dimensional light control device 30, a relay optical unit 40, a lens unit 50, and a light blocking unit 60 (see FIG. 3). , Mainly.

  The heat sink 10 is a portion that becomes a base when the light source device 20, the two-dimensional light control device 30, the relay optical unit 40, and the lens unit 50 are assembled. For example, in this embodiment, a heat sink 10 made of aluminum die cast is used.

  The light source device 20 is a portion that forms light controlled by the two-dimensional light control device 30, and as will be described later, the light source 21 (see FIG. 3) and the light from the light source 21 are directed to the relay optical unit 40. Irradiating lens unit 22 for irradiating, and holding unit 23 for holding irradiating lens unit 22 so as to be positioned at a predetermined position with respect to light source 21.

  The two-dimensional light control device 30 is arranged in a two-dimensional matrix, and is a digital micromirror including a light irradiation unit 31 (see FIG. 3) having a plurality of micromirrors that control the light reflection direction (irradiation direction). A device (DMD) or the like.

  As shown in FIG. 3, the two-dimensional light control device 30 is arranged on the rear side facing the lens unit 50 so that the light irradiation unit 31 faces the lens unit 50 side.

  In the present embodiment, the lens unit 50 is set such that the lens optical axis Z1 (see FIG. 3) is slightly below the upper and lower center of the lens region excluding the flange unit described later. Is substantially coincident with the lens optical axis Z1 (see FIG. 3).

  For this reason, the two-dimensional light control device 30 is arranged so that the center of the light irradiation unit 31 is located below the center of the lens unit 50 (the physical center of the lens region) when viewed in the vertical direction. Yes.

As shown in FIG. 2, the relay optical unit 40 is attached to a support unit 70 that is attached to a surface 10 </ b> A that faces the upper side of the heat sink 10 that is inclined obliquely forward, and transmits light from the light source device 20 to the two-dimensional light control device. It is a member that reflects toward 30.
A plurality of heat radiating fins arranged in the left-right direction and extending in the front-rear direction are provided on the side opposite to the surface 10 </ b> A of the heat sink 10.

  In the present embodiment, the support portion 70 has a wall surface extending from the heat sink 10 side to substantially the upper side of the lens portion 50, and a pair of left and right arm portions 71 to which the relay optical unit 40 is attached extend from the wall surface to the front side. In the wall surface, an opening 72 for allowing the light irradiation unit 31 (see FIG. 3) of the two-dimensional light control device 30 to face the lens unit 50 is formed.

  The two-dimensional light control device 30 was supported by a support structure 80 different from the support unit 70 fixed to the heat sink 10 so that the position of the light irradiation unit 31 (see FIG. 3) was aligned with the opening 72. The heat sink (not shown) for cooling the two-dimensional light control device 30 is attached.

  However, a heat sink (not shown) for cooling the two-dimensional light control device 30 to which the two-dimensional light control device 30 is attached is attached to the support unit 70, and the position of the light irradiation unit 31 (see FIG. 3) is located in the opening 72. The two-dimensional light control device 30 may be arranged so as to match.

  In the present embodiment, as shown in FIG. 3, the relay optical unit 40 is formed as a concave mirror that curves inward, and is directed toward the light irradiation unit 31 of the two-dimensional light control device 30 from the light source device 20 (direct irradiation). It is assumed that it has a reflection surface 41 that reflects light so as to collect light.

  However, the relay optical unit 40 is not necessarily limited to such a form. For example, the relay optical unit 40 is used as the light irradiation unit 31 of the two-dimensional light control device 30 by using a refractive index difference between a material such as a reflecting prism and air. You may be comprised with the optical member which reflects so that light may be condensed toward.

  As shown in FIG. 3, the lens unit 50 is formed by a combination of two or more lenses (front lens 51 and rear lens 52) formed of resin, and these lenses have flange portions (see FIG. (Not shown) is formed.

  As shown in FIG. 2, the lens portion 50 is held in front of the two-dimensional light control device 30 by holding a flange portion (not shown) of these lenses in a lens holder 90 attached to the support portion 70. The light from the two-dimensional light control device 30 is projected to the front side.

  In the present embodiment, the lens unit 50 includes a front lens 51 disposed on the front side and a rear lens 52 disposed on the rear side of the front lens 51.

  The front lens 51 is a biconvex lens that is curved so that both the entrance surface 51A and the exit surface 51B protrude outward, and the rear lens 52 is curved so that the entrance surface 52A protrudes outward. At the same time, it is a concave meniscus lens that curves so that the exit surface 52B is recessed inward.

  The front lens 51 is made of a low refractive index / low dispersion resin (for example, acrylic resin), and the rear lens 52 is made of a high refractive index / high dispersion resin (for example, polycarbonate resin). Etc.) and the Abbe numbers of the front lens 51 and the rear lens 52 are different (in this example, the front lens 51 has a higher Abbe number than the rear lens 52), and further. The lens unit 50 cancels chromatic aberration by swinging back and forth the amount of chromatic aberration in the front-rear direction from the center side (lens optical axis Z1 side) toward the radially outer side.

In the present embodiment, the lens unit 50 is configured by two lenses formed of resin. However, the lens unit 50 may be configured by three or more lenses formed of resin.
However, when the lens is formed of resin, the selection range of materials is small when considering the combination of refractive index and dispersion. Therefore, when the lens unit 50 is configured by a combination of three or more lenses, the lens It is better to form the glass.

  For example, when the lens unit 50 is configured with a front lens disposed on the front side, a rear lens disposed on the rear side, and a central lens disposed between the front lens and the rear lens, The front lens is a plano-convex lens that has a flat entrance surface (rear surface) and curves so that the exit surface (front surface) protrudes outward, and the rear lens, conversely, the incident surface (rear surface) protrudes outward. The plano-convex lens may be curved so that the exit surface (front surface) is flat, and the central lens may be a biconcave lens that is curved so that both the entrance surface (rear surface) and the exit surface (front surface) are recessed inward.

In this case, the glass material forming the front lens, the rear lens, and the central lens is made of, for example, a refractive index of the front lens, the rear lens, and the central lens at the sodium D line of 1.6. From about 1.7 to about 1.7, the Abbe number of the central lens may be lower than that of the front lens and the rear lens.
For example, as an example, the material of the front lens and the rear lens may be crown glass, and the material of the center lens may be flint glass.

  As will be described later, the light blocking unit 60 (see FIG. 3) is used when the two-dimensional light control device 30 performs control so that at least part of light does not enter the lens unit 50, that is, at least one of the micromirrors. When control is performed so that some of the micromirrors do not reflect light toward the lens unit 50, the light is reflected toward the light source device 20, so that the light is incident on the light source device 20. It is a member to block.

Next, a more detailed configuration will be described while explaining a state where the light source device 20 emits light.
As shown in FIG. 3, the light source device 20 includes a light source 21 having a substrate 21A and a semiconductor-type light emitting unit 21B provided on the substrate 21A.

In the present embodiment, the light-emitting portion 21B is formed of LED elements, and a plurality of square LED elements are connected in the left-right direction (paper surface direction in FIG. 3) without opening a gap, and are horizontally elongated in one left-right direction. The light emitting portion 21B.
Therefore, the light source 21 of the present embodiment includes one light emitting portion 21B that is horizontally long in the left-right direction.

  In addition, as described above, the light source device 20 includes the irradiation lens unit 22. As illustrated in FIG. 3, the irradiation lens unit 22 includes the first lens 22 </ b> A located on the light source 21 side and the first lens 22 </ b> A. 2nd lens 22B located in the relay optical part 40 side rather than 1 lens 22A, The holding | maintenance part 23 (in order that these 1st lens 22A and 2nd lens 22B are located in a predetermined position. (See FIG. 2).

  For example, the first lens 22A is preferably formed of a polycarbonate-based resin having excellent heat resistance because it is located on the light source 21 side, and the second lens 22B is located on the side away from the light source 21, and thus is heat resistant. It is not necessary to consider so much, and it may be formed of an acrylic resin or a polycarbonate resin.

However, the first lens 22 </ b> A is not limited to being a polycarbonate resin, because there may be no problem using an acrylic resin depending on the output of the light source 21 or the like.
Further, since it is conceivable that the output of the light source 21 is increased, it is conceivable from this point that the second lens 22B is also preferably made of a polycarbonate-based resin, and the first lens 22A and the second lens 22B are considered to be preferable. When both are formed of polycarbonate resin, the thickness of the irradiation lens portion 22 in the direction along the irradiation optical axis Z2 of the light irradiated from the light source 21 can be reduced.

  In addition, although illustration is abbreviate | omitted in FIG. 3, the 1st lens 22A and the 2nd lens 22B have a flange part around, and the flange part is hold | maintained at the holding | maintenance part 23 (refer FIG. 2). ing.

  In the present embodiment, the light source 21 is disposed on the surface 10A (see FIG. 2) of the heat sink 10 (see FIG. 2), and the portion of the support portion 70 (see FIG. 2) positioned around the light source 21. Although the holding portion 23 is attached, the holding portion 23 may be attached to the surface 10A (see FIG. 2) of the heat sink 10 (see FIG. 2).

  Here, as shown in FIG. 3, both the first lens 22A and the second lens 22B have both an incident surface (a surface facing the light source 21) and an output surface (a surface facing the relay optical unit 40). It is a biconvex lens that is curved to protrude outward.

  For this reason, the rectangular light pattern P1 from the light emitting part 21B of the light source 21 does not collapse, and the light intensity in the light pattern P1 is suppressed toward the reflecting surface 41 of the relay optical part 40. Design to irradiate light is easy to do.

  And since the light pattern P1 irradiated on the reflecting surface 41 of the relay optical unit 40 can be made into a rectangle with little deviation in luminous intensity in the light pattern P1, the light irradiation unit 31 has a horizontally long rectangular shape in the left-right direction. In addition, the reflective surface 41 is designed to make the light pattern P2 with a small intensity deviation reflected so as to be condensed toward the light irradiation unit 31 of the two-dimensional light control device 30. Cheap.

  Accordingly, since light can be irradiated so that the entire surface of the light irradiation unit 31 is not biased in light intensity, a horizontally elongated rectangular light distribution pattern projected to the front side through the lens unit 50 is also included in the light distribution pattern. In this case, it is possible to suppress the unevenness of luminous intensity.

FIG. 4 is a diagram for explaining a light distribution pattern on the screen formed by the lamp unit 1.
In FIG. 4, an HL-HR line indicates a horizontal reference line on the screen, and a VU-VL line indicates a vertical reference line on the screen.
In FIG. 4, the state of the low beam light distribution pattern LP formed by light from the lamp unit that forms a low beam light distribution pattern LP different from that of the lamp unit 1 is indicated by a dotted line.

  As shown in FIG. 4, when the light reflection direction of all the micromirrors of the light irradiation unit 31 of the two-dimensional light control device 30 is controlled to be incident on the lens unit 50, the left and right sides are displayed on the screen via the lens unit 50. A rectangular light distribution pattern AP that is horizontally long in the direction is formed.

  Specifically, the light distribution pattern AP corresponds to a high beam additional light distribution pattern for forming a high beam light distribution pattern by being multiplexed with the low beam light distribution pattern LP above the horizontal reference line (refer to the HL-HR line). The light distribution pattern covers from the light distribution area APU to the light distribution area APL including the area that displays a warning display on the road surface near the vehicle 102 below the horizontal reference line (refer to the HL-HR line). Yes.

  As described above, since the light distribution pattern AP has little deviation in luminous intensity, the micromirrors are individually controlled so that a part of the light is not projected on the screen side, and a warning is displayed. Even when drawing etc., the warning display etc. does not blur.

  On the other hand, as shown in FIG. 3, the relay optical unit 40 is disposed at a position between the two-dimensional light control device 30 and the lens unit 50 when viewed in the front-rear direction, and is viewed in the vertical direction. It is arranged above the light irradiated so as to be incident on the lens unit 50 from the two-dimensional light control device 30 (see the light pattern P3), and at least a part of the reflection surface 41 (substantially almost as viewed in the vertical direction). All) is above the light irradiated so as to be incident on the lens unit 50 from the two-dimensional light control device 30 (see the light pattern P3), and at least a part (almost all) of the reflecting surface 41 is present. The lens unit 50 is disposed so as to be located below the upper end.

  In the present embodiment, when the upper end of the flange portion held by the lens holder 90 of each lens (the front lens 51 and the rear lens 52) of the lens unit 50 not shown in FIG. The relay optical unit 40 is disposed so that almost all of the relay optical unit 40 is located below the upper end of the lens unit 50.

  Further, the light source device 20 is disposed at a position between the two-dimensional light control device 30 and the lens unit 50 when viewed in the front-rear direction, and the lens from the two-dimensional light control device 30 is viewed in the vertical direction. The light source device 20 is disposed at a position that does not hinder the light (see the light pattern P3) so as to be incident on the unit 50. In more detail, the light source device 20 has two irradiation lens units 22 as viewed in the vertical direction. It is below the light irradiated so as to enter the lens unit 50 from the three-dimensional light control device 30 (see the light pattern P3), and at least a part of the irradiation lens unit 22 is lower than the lower end of the lens unit 50. It arrange | positions so that it may be located on the upper side.

  In the present embodiment, when the lower end of the flange portion held by the lens holder 90 of each lens (the front side lens 51 and the rear side lens 52) of the lens unit 50 not shown in FIG. The light source device 20 is below the light (see the light pattern P3) irradiated so that the second lens 22B is incident on the lens unit 50 from the two-dimensional light control device 30 when viewed in the vertical direction. In addition, almost all of the second lens 22B is disposed above the lower end of the lens unit 50.

  In this way, the light source device 20 and the relay optical unit 40 are made to be two-dimensional light as much as possible without obstructing the light (see the light pattern P3) irradiated so as to enter the lens unit 50 from the two-dimensional light control device 30. Since the light is irradiated so as to be incident on the lens unit 50 from the control device 30 (see the light pattern P3), the vertical size is made compact so that the vehicle lamp can be easily downsized. ing.

  Note that, for example, a lamp unit that forms the low beam light distribution pattern LP touched a little earlier, or another lamp unit for forming a high beam light distribution pattern may be disposed on the upper side of the lamp unit 1. By arranging the light source device 20 on the lower side, the light source device 20 can be hardly affected by heat.

  In addition, when the arrangement is compact in this way, the micromirror is driven when the two-dimensional light control device 30 performs control so that at least part of light does not enter the lens unit 50 in order to draw a warning display or the like. Thus, when the light is reflected obliquely downward, the light is reflected toward the light source device 20.

  However, as mentioned above, in the present embodiment, between the two-dimensional light control device 30 and the light source device 20 (more specifically, the two-dimensional light control device 30 and the second lens 22B of the irradiation lens unit 22) And a light blocking unit 60 that blocks the light emitted from the two-dimensional light control device 30 from entering the light source device 20 (more specifically, the second lens 22B).

  For this reason, the two-dimensional light control device 30 can irradiate light that does not enter the lens unit 50 toward the light blocking unit 60 when performing control so that at least part of the light does not enter the lens unit 50. It is suppressed that light is irregularly reflected by the device 20 (second lens 22B) and irradiated to the front side, resulting in glare.

  For example, the light blocking unit 60 is inclined rearward and upward so that the light blocking surface 61 faces the light irradiation unit 31 of the two-dimensional light control device 30 so that the light blocking unit 60 can easily receive light from the two-dimensional light control device 30. It is preferable that the light blocking surface 61 is made uneven so as to increase the light scattering attenuation so that the light blocking power is increased, and the coating or vapor deposition of a color that easily absorbs light is performed.

  In the present embodiment, the light blocking surface 61 is provided with a plurality of fin-shaped convex portions extending in the left-right direction in the front-rear direction to form a concave-convex shape. However, the present invention is not limited to this and is roughened by sandblasting. It may be such that fine irregularities are formed by performing a surface treatment or the like.

  On the other hand, in order to draw a warning display or the like, when the two-dimensional light control device 30 performs control so that at least part of light does not enter the lens unit 50, the micromirror is driven to reflect the light obliquely upward on the front side. It is also possible to make it.

  However, in this case, similarly, even if a light blocking unit is provided, if light that cannot be blocked by vibration of the vehicle 102 or the like is generated, the leaked light is irradiated above the horizontal reference line of the screen, Since the probability of becoming glare is higher than when light is reflected obliquely downward on the front side, the two-dimensional light control device 30 performs control so that at least part of light does not enter the lens unit 50 as in the present embodiment. When performing, it is preferable to drive the micromirror so that light is allowed to escape obliquely forward and downward.

  In the present embodiment, the light source device 20 is disposed so that the irradiation optical axis Z2 of the light emitted from the light source 21 faces obliquely upward and forward, and the relay optical unit 40 includes the irradiation optical axis of the reflecting surface 41. The point intersecting with Z2 is disposed so as to be offset forward of the vertical axis V passing through the light emission center O of the light emitting portion 21B.

  For this reason, the relay optical unit 40 is arranged so that the reflection surface 41 reflects light from the light source device 20 obliquely downward to the light irradiation unit 31 of the two-dimensional light control device 30 at a gentle angle. Therefore, it is possible to suppress the occurrence of undue stress on the shape of the reflection surface 41 for performing control for condensing the light toward the light irradiation unit 31, and to irradiate the light irradiation unit 31 with light with a substantially uniform luminous intensity. be able to.

  Therefore, the light intensity in the light distribution pattern AP on the screen can be made more uniform.

  As described above, according to the present embodiment, since both the first lens 22A and the second lens 22B are biconvex lenses, a rectangular shape with uniform light intensity toward the reflecting surface 41 is obtained. The light pattern P <b> 1 can be irradiated, and the light distribution pattern AP can be formed in a clean rectangular shape along with the uniform light intensity in the light distribution pattern AP on the screen.

  In addition, the light source device 20 is disposed so that the irradiation optical axis Z2 of the light emitted from the light source 21 faces obliquely upward in the forward direction, so that the light is condensed toward the light irradiation unit 31 by the reflection surface 41. Therefore, it is not necessary to make an unreasonable design, so that the light intensity in the light distribution pattern AP on the screen can be made more uniform and the light distribution pattern AP can be formed in a clean rectangular shape.

  On the other hand, since the light source device 20 and the relay optical unit 40 are made to approach the light irradiated so as to enter the lens unit 50 from the two-dimensional light control device 30 (see the light pattern P3), the size in the vertical direction is set. It is compact and facilitates downsizing of the vehicular lamp, and by providing the light blocking part 60 between the two-dimensional light control device 30 and the second lens 22B of the irradiation lens part 22, the occurrence of glare is firmly achieved. It can be suppressed.

  Therefore, when the two-dimensional light control device 30 such as DMD is provided, the vehicular lamp is provided with less blur of a projected image, can be made compact, and glare can be suppressed.

  As described above, the present invention has been described based on the specific embodiments. However, the present invention is not limited to the above-described embodiments, and modifications and improvements to the above-described embodiments are also included in the technology of the invention. This is included in the scope, and it will be apparent to those skilled in the art from the scope of the claims.

DESCRIPTION OF SYMBOLS 1 Lamp unit 10 Heat sink 10A Surface 20 Light source device 21 Light source 21A Substrate 21B Light emission part 22 Irradiation lens part 22A First lens 22B Second lens 23 Holding part 30 Two-dimensional light control apparatus 31 Light irradiation part 40 Relay optical part 41 Reflecting surface 50 Lens portion 51 Front lens 51A Entrance surface 51B Exit surface 52 Rear lens 52A Entrance surface 52B Exit surface 60 Light blocking portion 61 Light blocking surface 70 Support portion 71 Arm portion 72 Opening portion 80 Support structure 90 Lens holder AP Light distribution pattern APL , APU Light distribution area LP Low beam light distribution pattern P1, P2, P3 Light pattern Z1 Lens optical axis Z2 Irradiation optical axis 101L, 101R Vehicle headlamp 102 Vehicle

Claims (7)

A vehicle lamp for controlling light projected by a two-dimensional light control device,
The vehicular lamp is
A light source device;
A relay optical unit that reflects light from the light source device toward the two-dimensional light control device;
A lens unit that projects light from the two-dimensional light control device to the front side and combines two or more lenses formed of resin; and
The light source device is
A light source having one light emitting unit;
A first lens located on the light source side;
A second lens positioned closer to the relay optical unit than the first lens,
A vehicular lamp characterized in that both the first lens and the second lens are biconvex lenses formed of resin. A vehicle lamp for controlling light projected by a two-dimensional light control device,
The vehicular lamp is
A light source device;
A relay optical unit that reflects light from the light source device toward the two-dimensional light control device;
A lens unit that projects light from the two-dimensional light control device to the front side and combines three or more lenses formed of glass, and
The light source device is
A light source having one light emitting unit;
A first lens located on the light source side;
A second lens positioned closer to the relay optical unit than the first lens,
A vehicular lamp characterized in that both the first lens and the second lens are biconvex lenses formed of resin. The two-dimensional light control device is disposed on the rear side facing the lens unit,
The relay optical unit is disposed at a position between the two-dimensional light control device and the lens unit when viewed in the front-rear direction, and is viewed from the two-dimensional light control device when viewed in the vertical direction. Arranged above the light irradiated so as to be incident on the part,
The light source device is disposed at a position between the two-dimensional light control device and the lens unit when viewed in the front-rear direction, and the second lens is controlled by the two-dimensional light control when viewed in the vertical direction. Arranged so that at least a part of the second lens is positioned above the lower end of the lens unit, lower than the light irradiated so as to enter the lens unit from the apparatus. The vehicular lamp according to claim 1 or 2. The vehicular lamp includes a light blocking unit that is positioned between the two-dimensional light control device and the second lens and blocks light emitted from the two-dimensional light control device from entering the light source device. ,
The said two-dimensional light control apparatus irradiates the light which does not enter into the said lens part toward the said light blocking part, when performing control which does not make at least one part light enter into the said lens part. The vehicle lamp as described in 2. The relay optical unit has a reflection surface that reflects light toward the light irradiation unit of the two-dimensional light control device;
When viewed in the vertical direction, the relay optical unit is above the light irradiated so that at least a part of the reflection surface is incident on the lens unit from the two-dimensional light control device, and the reflection optical unit The vehicular lamp according to claim 3 or 4, wherein at least a part of the surface is disposed so as to be located below the upper end of the lens portion.   The said two-dimensional light control apparatus is arrange | positioned so that the center of the said light irradiation part may be located below the center of the said lens part seeing in an up-down direction. Vehicle lamp.   The vehicle according to claim 5 or 6, wherein the two-dimensional light control device is a digital micromirror device having a plurality of micromirrors that control the direction of light irradiation as the light irradiation unit. Lamps.

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