JP2014038733A - Lamp for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lamp for a vehicle capable of easily adjusting a radiation range, a radiation angle and a light amount of light to be emitted at a high degree of freedom in optical design, and improving visibility from a side of the lamp for the vehicle.SOLUTION: The lamp for a vehicle comprises: a light guide unit 31 having a first light guide 33 on which a first light incident face 37 and a first light emission face 38 are formed, and a second light guide 34 on which a second light incident face 43 and a second light emission face 44 are formed; and a light source 32 for emitting light L toward the first light incident face 37. The first light guide 33 emits the light L incident on the first light incident face 37 as almost parallel light L1 from the first light emission face 38 toward the second incident face 43, and the second light incident face 43 has a plane part almost parallel to the first light emission face 38, and a light distribution adjustment part for diffracting or diffusing incident light L3.

Description

  The present invention relates to a vehicular lamp including a light source and a light guide unit.

  Vehicles have various types of lamps depending on the application. For example, daytime running lamps (hereinafter also referred to as DRL), tail lamps, stop lamps, clearance lamps (hereinafter referred to as vehicle width lights). For example).

  Such vehicular lamps have different irradiation ranges, irradiation angles, light amounts, and the like required depending on applications, and thus are optically designed using optical members such as a light guide and a reflector. Patent Document 1 discloses an illumination device that emits light forward using two lenses and one reflector.

JP 2007-287449 A

  However, in the illumination device of Patent Document 1, since many parts are used as the optical member, the optical design is complicated and the degree of freedom is low. For this reason, it is difficult to adjust the irradiation range, irradiation angle, light quantity, etc. of the light irradiated forward, and to increase the visibility from around the vehicle lamp by emitting light in directions other than the front. It was.

  An object of the present invention is to have a high degree of freedom in optical design, and it is possible to easily adjust the irradiation range, irradiation angle, light amount, etc. of the irradiated light and to improve the visibility from the surroundings of the vehicle lamp. Is to provide a vehicular lamp.

  The vehicular lamp of the present invention capable of solving the above-described problems includes a first light guide body having a first light incident surface and a first light emitting surface, a second light incident surface, and a second light emitting surface. A light guide unit having a surface, and a light source that emits light toward the first light incident surface, wherein the first light guide includes: The light incident on the first light incident surface is emitted from the first light emitting surface toward the second light incident surface as substantially parallel light, and the second light incident surface includes the first light emitting surface and the first light emitting surface. It has a substantially parallel plane part and a light distribution adjusting part for refracting or diffusing incident light.

  In the vehicular lamp of the present invention, it is preferable that a plurality of the planar portions are formed on the second light incident surface, and the light distribution adjusting portions are formed between the formed planar portions.

  In the vehicle lamp of the present invention, it is preferable that a side light diffusing portion that diffuses and emits light incident from the light distribution adjusting portion is formed on a side surface of the second light guide.

  In the vehicle lamp of the present invention, a plurality of the light distribution adjusting portions are formed on the second light incident surface, and the light incident from the planar portion is diffused and emitted on the second light emitting surface. It is preferable that a plurality of outgoing light diffusion portions are formed, and an arrangement pitch at which the outgoing light diffusion portions are formed is larger than an arrangement pitch at which the light distribution adjusting portion is formed.

According to the vehicular lamp of the present invention, the first light guide has a function of forming substantially parallel light, and thus substantially parallel light is incident on the second light incident surface. For this reason, the shape of the light distribution adjusting unit on the second light incident surface is changed according to the irradiation area, irradiation angle, light quantity, etc. required according to the type and application of the vehicular lamp, The ratio of the adjustment unit can be changed. That is, a high degree of design freedom is ensured on the second light incident surface.
Further, the light incident from the light distribution adjusting unit can be emitted from a surface formed between the second light incident surface and the second light emitting surface of the second light guide.
In this way, if the second light exit surface is arranged so as to face the front of the vehicle lamp, light that is not used as irradiation light that irradiates the front of the vehicle lamp is emitted from the side of the vehicle lamp to the outside. Since it is emitted, the vehicular lamp will shine three-dimensionally. Therefore, for example, even when a pedestrian sees the vehicle lamp from the side, it is easy to notice that the vehicle lamp is present, and visibility from the pedestrian (visibility from the side) is improved. improves.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic plan view of a headlamp provided with a daytime lighting lamp as an example of a vehicle lamp according to the present invention and its surroundings. It is a front view of the headlamp provided with the lamp for daytime lighting. It is a figure which shows the lamp | ramp for daytime lighting, Comprising: (a) is a front view, (b) is a side view, (c) is a bottom view. It is a figure which shows the optical path in the lamp for daytime lighting, Comprising: (a) is a longitudinal cross-sectional view, (b) is a cross-sectional view. It is a perspective view of the 2nd light guide which comprises a light guide unit. It is a cross-sectional view by the side of the 2nd light entrance plane of the 2nd light guide which constitutes a light guide unit. It is a cross-sectional view by the side of the 2nd light entrance plane showing the modification of the 2nd light guide. It is a figure which shows the modification of a 2nd light guide, Comprising: (a) is a cross-sectional view by the side of the 2nd light incident surface, (b) is a front view by the side of the 2nd light incident surface. It is a figure which shows the modification of the shape of a light guide unit, Comprising: (a) is a front view, (b) is sectional drawing of the AA line in (a), (c) is B in (a). It is sectional drawing of a -B line.

Hereinafter, an example of an embodiment of a vehicular lamp according to the present invention will be described with reference to the drawings.
In the present embodiment, a case in which the vehicular lamp of the present invention is provided as a daytime running lamp (DRL) for a vehicle such as an automobile will be described as an example. This daytime lighting lamp is lit in the daytime or the like in order to make oncoming vehicles or pedestrians know the existence of the vehicle. In the following description, the front, rear, top and bottom, and left and right directions are in a standard posture corresponding to a state in which a vehicle equipped with a daytime lighting lamp is traveling straight on a horizontal plane, and the driver is facing forward. Based on the driver's viewpoint when

  As shown in FIGS. 1 and 2, a daytime lighting lamp 11 that is a vehicular lamp according to the present embodiment is built in a pair of left and right headlamps 13 provided at a front portion of a vehicle 12. The daytime lighting lamp 11 is formed in a thin rectangular parallelepiped shape, and is disposed along the vertical direction.

  The headlamp 13 includes a lamp body 21 and a translucent outer lens 22 that covers an opening on the front side of the lamp body 21, and the lamp chamber S includes the lamp body 21 and the outer lens 22. Is formed. The lamp chamber S houses a daylighting lamp 11 that is a vehicle lamp according to the present embodiment, together with a headlamp 23 that is turned on when the vehicle 12 travels at night or the like when the vehicle 12 travels.

As shown in FIGS. 3A to 3C and FIGS. 4A and 4B, the daytime lighting lamp 11 includes a light guide unit 31 and a light source 32.
The light guide unit 31 includes a first light guide 33 and a second light guide 34. The first light guide body 33 and the second light guide body 34 are plate bodies made of a resin having excellent light guide properties, and are arranged in series in the front and rear directions. Note that the left side of FIG. 3B is the front of the vehicle, and the right side is the rear of the vehicle.

  The light source 32 includes a light emitting element 41 made of an LED (Light Emitting Diode), and the light emitting element 41 is disposed at a position facing the first light guide 33. The light source 32 emits the light from the light emitting element 41 toward the first light guide 33, and the light from the light emitting element 41 enters the first light guide 33.

  The first light guide 33 has a plurality of light incident portions 35 formed in a substantially conical shape protruding toward the light source 32 on the light source 32 side. A concave portion 36 is formed on the top of these light incident portions 35. In these light incident portions 35, first light incident surfaces 37 each having a substantially conical shape are formed on the bottom surface portion of the concave portion 36. A light source is disposed at a position facing the first light incident surface 37. Thirty-two light emitting elements 41 are arranged. Further, the first light guide 33 has a first light emitting surface 38 having a flat surface opposite to the light source 32.

  4A and 4B, a part of the light L of the light emitting element 41 of the light source 32 is emitted toward the first light incident surface 37 of the first light guide 33, The light enters from the first light incident surface 37 into the first light guide 33. The light L from the light emitting element 41 of the light source 32 is incident on the first light incident surface 37 of the first light guide 33, and the light L is substantially parallel light L1 traveling forward of the vehicle 12 due to refraction at that time. It becomes. The light L1 is emitted from the first light emitting surface 38 toward a second light incident surface 43 (to be described later) of the second light guide 34. In addition, the other part of the light L of the light emitting element 41 of the light source 32 is incident from the inner peripheral surface of the concave portion 36, reflected by the peripheral surface of the light incident portion 35, and substantially parallel light L 1 traveling forward of the vehicle 12. Become. These lights L1 are emitted from the first light emitting surface 38 toward the second light incident surface 43 of the second light guide 34. The substantially parallel light includes not only light that is completely parallel to the side surface of the first light guide 33 but also light that is slightly inclined.

  The outer periphery of the first light guide 33 excluding the first light incident surface 37 and the first light emitting surface 38 is covered with a light shielding cover 39 (see FIG. 3). Further, the periphery of the light emitting element 41 of the light source 32 is also covered by the light shielding cover 39. Thereby, the light leakage from the circumference | surroundings of the 1st light guide 33 is suppressed, and it becomes difficult to visually recognize the light emitting element 41 of the light source 32 from the outside, and the design property can be improved and the appearance can be improved.

  The second light guide 34 has a second light incident surface 43 on the first light guide 33 side, and the second light incident surface 43 is the first light guide surface 33 of the first light guide 33. The light emitting surface 38 is disposed at a position facing the light emitting surface 38 with an interval. The second light guide 34 has a second light exit surface 44 on the side opposite to the first light guide 33, and the second light exit surface 44 faces the front of the vehicle 12. Are arranged.

  As shown in FIGS. 5 and 6, the second light incident surface 43 includes a plurality of plane portions 51 and a plurality of light distribution adjustment portions 52. The planar portion 51 and the light distribution adjusting portion 52 are formed along a direction orthogonal to the thickness direction of the second light guide 34 (ie, the left-right direction of the vehicle), that is, the up-down direction. The flat portion 51 is a flat surface that is substantially parallel to the first light emitting surface 38 of the first light guide 33, and these flat portions 51 are alternately different in distance from the first light emitting surface 38. . The light distribution adjusting unit 52 is formed of a curved surface that is formed between the flat portions 51 and is recessed in a circular arc shape in a sectional view. The substantially parallel plane includes not only a plane completely parallel to the first light emitting surface 38 but also a plane slightly inclined.

  As shown in FIGS. 4A and 4B, the plane portion 51 in the second light incident surface 43 receives the light L1 incident from the first light emitting surface 38 of the first light guide 33 as it is. To the second light exit surface 44 as substantially parallel light L2 traveling forward. On the other hand, the light distribution adjusting unit 52 refracts or diffuses the light L1 incident from the first light emitting surface 38 of the first light guide 33 when entering the light distribution adjusting unit 52. Thereby, the light distribution adjusting unit 52 guides the incident light L1 as the light L3 directed to the side surface 34a of the second light guide 34 in a direction different from that of the light L2 incident on the plane unit 51. A part of the light L3 guided to the side surface 34a of the second light guide 34 is emitted from the side surface 34a to the outside. The other part of the light L3 is guided to the second light emitting surface 44 while being reflected by the side surface 34a.

  A plurality of side surface light diffusion portions 53 (see FIGS. 3 and 5) are formed on the side surface 34 a of the second light guide 34. These side light diffusing portions 53 are provided by applying a texture to the surface of the second light guide 34, and diffuse the incident light L3 and emit it to the outside. As a method of embossing, the embossing is formed on the mold for molding the second light guide 34 by etching or the like, and the second light guide 34 is molded with this mold. There are a method of forming a texture on the surface of the second light guide 34 and a method of directly forming a texture on the surface of the molded second light guide 34 by sandblasting.

  A plurality of outgoing light diffusion portions 54 are formed on the second light outgoing surface 44 of the second light guide 34. Each of these outgoing light diffusion portions 54 is formed in a substantially spherical shape protruding outward, and diffuses the light incident on the outgoing light diffusion portion 54 and emits it to the outside. The arrangement pitch of the second light guides 34 in the thickness direction of the outgoing light diffusion parts 54 is the thickness direction of the second light guides 34 in the light distribution adjusting part 52 of the second light incident surface 43 (that is, It is larger than the arrangement pitch in the left-right direction of the vehicle.

  According to the present embodiment, when the light emitting element 41 of the light source 32 emits light so as to turn on the daytime lighting lamp 11 having the above-described configuration, the light L of the light emitting element 41 is the first guide that constitutes the light guide unit 31. The light 33 is guided to the second light guide 34 as substantially parallel light L1. And in this 2nd light guide 34, the reflected light of the light L2 which injected from the plane part 51 of the 2nd light guide 34, and the light L3 which entered from the light distribution adjustment part 52, and was reflected on both the side surfaces 34a. Then, the light is diffused by the outgoing light diffusing portion 54 formed on the second light outgoing surface 44 and emitted to the outside as front irradiation light that is irradiation light that irradiates the front of the daytime lighting lamp 11. A part of the light L3 guided to the both side surfaces 34a by the light distribution adjusting unit 52 of the second light incident surface 43 is emitted to the outside from the both side surfaces 34a of the second light guide 34.

  As a result, in the daytime lighting lamp 11, both side surfaces 34 a shine together with the second light emitting surface 44 of the second light guide 34 of the light guide unit 31. That is, in the daytime lighting lamp 11, the second light guide 34 of the light guide unit 31 shines in three dimensions.

  As described above, according to the daytime lighting lamp 11 of the present embodiment, the first light guide 33 has a function of forming the substantially parallel light L1, and thus the second light of the second light guide 34. The substantially parallel light L1 is incident on the incident surface 43. For this reason, according to the irradiation area | region, irradiation angle, light quantity, etc. which are requested | required by the daytime lighting lamp 11, the shape of the curved surface dented in the cross-sectional arc shape of the light distribution adjustment part 52, the plane part 51, and the light distribution adjustment part 52 The ratio of can be changed. That is, the second light incident surface 43 is secured with a high degree of design freedom.

Further, the light incident from the light distribution adjusting unit 52 can be emitted from the side surface 34 a formed between the second light incident surface 43 and the second light emitting surface 44 of the second light guide 34.
In this way, by emitting light that is not used as the forward irradiation light from the side to the outside, the daytime lighting lamp 11 can be illuminated three-dimensionally. Therefore, for example, even when the pedestrian looks at the daytime lighting lamp 11 from the side, it is easy to notice that the daytime lighting lamp 11 exists, and visibility from the pedestrian (from the side) (Visibility) is improved. Thereby, it becomes easy to call attention by making the pedestrian recognize the presence of the vehicle 12.

  Further, since the vicinity of the second light guide 34 can be dimly illuminated, the three-dimensional shape of other lamps can be seen in three dimensions, such as covering the periphery of the projector-type or parabolic-type headlamp 23. The design can be improved and the appearance can be improved.

  By the way, when the light guide member is designed to form a substantially conical shape that forms substantially parallel light and a shape such as a predetermined slit that refracts or diffuses light laterally on the incident surface of one light guide member, The shape of the incident surface becomes complicated. Such a light guide member is difficult to be removed from the entrance surface having a complicated shape when the light guide member is molded by a mold. That is, it is difficult to mold a light guide member having a function of forming substantially parallel light from incident light and a function of bending or diffusing the incident light laterally with a mold.

  On the other hand, in the daytime lighting lamp 11 of the present embodiment, the light guide member is composed of two parts of the first light guide 33 and the second light guide 34, and the first light guide 33 A function of forming substantially parallel light is provided, and the second light guide 34 is provided with a refraction and diffusion function. Such a daytime lighting lamp 11 can simplify the shape of each of the light guide members, and can be easily molded with a mold. That is, the manufacture of the light guide member can be facilitated. In addition, the second light incident surface 43 of the second light guide 34 does not need to have a function of making all light substantially parallel light. 43 can be secured with a high degree of design freedom.

In the second light guide 34, a plurality of flat portions 51 are formed on the second light incident surface 43, and a plurality of light distribution adjusting portions 52 are formed between the flat portions 51 formed. The light quantity of the front irradiation light on the two-light emitting surface 44 can be adjusted uniformly throughout.
In addition, if the light distribution adjusting unit 52 has a curved shape with an arc shape in cross section as in the present embodiment, the light that totally reflects the inside of the second light guide 34 by changing the curvature of the curved surface. Can be increased or decreased, and the amount of the front irradiation light can be easily adjusted.

  Further, the side light diffuser 53 that diffuses and emits the light L3 incident from the light distribution adjusting unit 52 is formed on the side surface 34a of the second light guide 34, so that it is used for daytime lighting that is a vehicular lamp. The three-dimensional effect of the lamp 11 can be further improved to provide a good depth feeling. Further, the side light can be used as irradiation light for irradiating a certain range.

  Further, a plurality of outgoing light diffusing parts 54 that diffuse and emit the light L2 incident from the flat part 51 and the light L3 reflected by the side face 34a are formed on the second light outgoing surface 44, and the outgoing light diffusing part 54 is formed. By making the arrangement pitch to be larger than the arrangement pitch at which the light distribution adjusting unit 52 is formed, the front irradiation light can be diffused and the front irradiation light can be irradiated to a certain range.

Next, a modified example of the second light guide 34 constituting the light guide unit 31 will be described.
As shown in FIG. 7, in the second light guide 34 </ b> A according to the first modification, the light distribution adjusting unit 52 provided between the plane parts 51 is inclined in a plane shape that connects the adjacent plane parts 51. It is composed of surfaces. The inclined surface of the light distribution adjusting unit 52 is set to have an angle at which the refracted light L3 directed from the inclined surface toward the side surface 34a is totally reflected by the side surface 34a.

  In the case of the second light guide 34 </ b> A having the light distribution adjustment unit 52 having such an inclined surface, a part of the light L <b> 1 incident from the first light exit surface 38 of the first light guide 33 is distributed. The light is refracted when entering the light adjusting unit 52, and is guided as light L3 toward the side surface 34a of the second light guide 34A, which is in a direction different from the light L2 incident from the plane unit 51. The light L3 is guided to the second light emitting surface 44 while being reflected by the side surface 34a. Further, when the side surface light diffusion portion 53 is provided on the side surface 34a, the light L3 guided to the side surface light diffusion portion 53 is emitted to the outside from the side surface 34a (broken arrows in FIG. 7). Thereby, both the side surfaces 34a of the second light guide 34A shine together with the second light emitting surface 44, and thus the three-dimensional light shines.

  As shown in FIGS. 8A and 8B, in the second light guide 34 </ b> B according to the second modification, each plane portion 51 is formed in the same plane. In the meantime, a light distribution adjusting unit 52 is formed which is subjected to embossing.

  In the case of the second light guide 34B having the light distribution adjustment unit 52 subjected to such a texture processing, a part of the light L1 incident from the first light exit surface 38 of the first light guide 33 is It is diffused by the light distribution adjusting unit 52. Part of the diffused light is guided as light L3 that travels to the side surface 34a of the second light guide 34B, which is in a direction different from the light L2 incident from the flat surface portion 51. The light L3 guided to the side surface 34a of the second light guide 34B is emitted to the outside from the side surface 34a. Further, a part of the light L3 is guided to the second light emitting surface 44 while being reflected by the side surface 34a. Thereby, both the side surfaces 34a of the second light guide 34B shine together with the second light emitting surface 44, and thus shine three-dimensionally.

  The light distribution adjusting unit 52 may be a curved surface having a circular arc shape in cross section or a slanted surface having a flat shape, and if such a light distribution adjusting unit 52 is provided, light can be diffused more satisfactorily. be able to.

  In addition, this invention is not limited to what was illustrated to the said embodiment, In the range which does not deviate from the summary of this invention, it can change suitably.

  For example, in the above embodiment, the daytime lighting lamp 11 has a rectangular parallelepiped shape arranged in the vertical direction in the lamp chamber S of the headlamp 13, but as shown in FIG. The shape may be U-shaped to surround the shape, or may be cylindrical, and the shape is not limited to this example. In the above embodiment, the daytime lighting lamp 11 of the headlamp 13 has been described as an example. However, the vehicular lamp of the present invention is not limited to the daytime lighting lamp 11, but a tail lamp, a stop lamp, or a vehicle. The present invention can also be applied by adjusting the amount of light to other illuminations such as a clearance lamp which is a width lamp.

  Modification examples of the shape of the light guide unit will be described with reference to FIGS. The light guide unit 100 is the same as the light guide unit 31 described above except that the shapes of the first light guide and the second light guide are U-shaped when viewed from the front. It has the function of. As shown in FIG. 9A, the light guide unit 100 includes a first light guide (not shown) having a U-shape when viewed from the front and a second light guide 34C.

  Specifically, the second light guide 34C is curved so as to slightly bulge outward (right side) upward from one end (right end) of the rectangular plate-shaped bottom surface portion 341 and the bottom surface portion 341. It has a right side surface portion 342 that extends and a left side surface portion 343 that extends upward from the other end (left end) of the bottom surface portion 341 and is curved so as to slightly bulge outward (left side). It is U-shaped with an opening above.

  In FIG. 9A, the first light guide has the same U shape as that of the second light guide 34C, and is disposed behind the second light guide 34C. The illustration is omitted. The function of the first light guide is the same as in the above example. That is, the first light guide has a first light incident surface and a first light emitting surface, and the light incident on the first light incident surface is made substantially parallel light from the first light emitting surface. The light is emitted toward the second light incident surface 43 of the second light guide 34C.

  Further, as shown in FIGS. 9B to 9C, the second light guide 34C includes a second light incident surface 43 on which a flat surface portion 51 and a light distribution adjusting portion 52 are formed, and an emitted light diffusion. And a second light exit surface 44 on which a portion 54 is formed. The light distribution adjusting portion 52 formed on the second light incident surface 43 of the right side surface portion 342 is slightly outward (right side) from one end (right end) of the bottom surface portion 341 upward along the shape of the right side surface portion 342. It is formed to curve so as to swell. Similarly, the second light emission surface 44 is formed along the shape of the right side surface portion 342.

Similarly, the light distribution adjustment portion 52 formed on the second light incident surface 43 of the light side surface portion 343 is also directed upward from the other end (left end) of the bottom surface portion 341 along the shape of the left side surface portion 343. It is formed to be curved so as to swell slightly outward (left side). Similarly, the second light exit surface 44 is formed along the shape of the left side surface portion 343.
The light distribution adjusting portion 52 and the second light emitting surface 44 formed on the second light incident surface 43 of the bottom surface portion 341 are formed linearly along the shape of the bottom surface portion 341.

  In the daytime lighting lamp using the light guide unit 100, the light that is not used as the front irradiation light is transmitted to the right side or the left side of the right side surface part 342 via the side surfaces 34a of the second light guide 34C with the above-described configuration. By emitting light toward the left side of the surface portion 343 and below the bottom surface portion 341, that is, emitting light toward the outside of the U-shaped second light guide 34 </ b> C, the daytime lighting lamp can be illuminated three-dimensionally. Can do. In addition, by arranging another lamp (such as a headlamp) in the region of the U-shaped opening of the second light guide 34C, it is possible to improve the design of the daytime lighting lamp and improve its appearance.

  In the light guide unit 100, as in the above-described example, the light distribution adjusting unit 52 may be inclined or textured, and a side light diffusing unit may be provided on the side surface 34a.

11: Daytime lighting lamp (an example of a vehicular lamp), 31, 100: Light guide unit, 32: Light source, 33: First light guide, 34: Second light guide, 37: First light Incident surface, 38: first light emitting surface, 43: second light incident surface, 44: second light emitting surface, 51: flat surface portion, 52: light distribution adjusting portion, 53: side light diffusing portion, 54: emitted light Diffusion part

Claims (4)

A first light guide having a first light incident surface and a first light output surface; and a second light guide having a second light incident surface and a second light output surface. A light guide unit;
A light source that emits light toward the first light incident surface;
With
The first light guide emits light incident on the first light incident surface as substantially parallel light from the first light emitting surface toward the second light incident surface,
The vehicular lamp, wherein the second light incident surface includes a flat portion that is substantially parallel to the first light emitting surface and a light distribution adjusting portion that refracts or diffuses incident light.   2. The vehicular lamp according to claim 1, wherein a plurality of the flat portions are formed on the second light incident surface, and the light distribution adjusting portions are formed between the plurality of formed flat portions.   3. The side light diffusing section for diffusing and emitting the light incident from the light distribution adjusting section is formed on a side surface of the second light guide. 4. Vehicle lamp. A plurality of the light distribution adjusting portions are formed on the second light incident surface,
The second light exit surface is formed with a plurality of exit light diffusion portions for diffusing and emitting the light incident from the plane portion,
4. The vehicular lamp according to claim 1, wherein an arrangement pitch in which the emitted light diffusion portion is formed is larger than an arrangement pitch in which the light distribution adjustment unit is formed. 5.

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