JP2014199763A - Automotive lighting fixture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an automotive lighting fixture capable of suppressing point-like lighting of light emitted by a semiconductor light-emitting element.SOLUTION: An automotive lighting fixture includes a light conducting body 30 having an incident part 31 for accepting light emitted by a semiconductor light-emitting element 21, a light conducting part 32 for conducting incidence light entered at the incident part 31, an outgoing radiation part 33 for radiating light conducted by the conducting part 32. The incident part 31 includes a first incident part 71 for refracting light L1 from the semiconductor light-emitting element 21 towards parallel to an outgoing radiation axis Ax of the semiconductor light-emitting element 21, and a second incident part 72 disposed on or near the outgoing radiation axis Ax. The second incident part 72 refracts light L2, at least a part of light from the semiconductor light-emitting element 21, so as to have a distance Db, passing through the outgoing radiation part 33 from an outgoing radiation position B to the outgoing radiation axis Ax, longer than a distance Da, passing through the second incident part 72 from an incident position A to the outgoing radiation axis Ax.

Description

  The present invention relates to a vehicular lamp having a semiconductor light emitting element.

  In recent years, in order to develop a lamp with a new design, development of a vehicular lamp using a semiconductor light emitting element such as an LED (Light Emitting Diode) has been promoted.

  For example, a vehicular lamp is known that includes a light emitting diode group in which a plurality of light emitting diodes are arranged in a row, and a light guide plate made of a transparent plate disposed on the front side of the light emitting diode group.

JP 2003-141909 A

  In the vehicular lamp configured as in Patent Document 1, light emitted from the light emitting diode group is incident on the incident surface of the light guide, passes through the interior, and then exits from the exit surface toward the front of the lamp. When the vehicular lamp in a state where light is emitted in this way is viewed from the front of the lamp, a part of the exit surface of the light guide may appear to be lit up.

  An object of the present invention is to provide a vehicular lamp that can suppress the flashing of light emitted from a semiconductor light emitting element.

The vehicular lamp of the present invention capable of solving the above problems is
A semiconductor light emitting device as a light source;
An incident portion into which light emitted from the semiconductor light emitting element is incident; a light guide portion that guides light incident on the incident portion; and an emission portion that emits light guided by the light guide portion; A light guide having
With
The incident portion includes a first optical element that refracts light from the semiconductor light emitting element in a direction parallel to the output axis of the semiconductor light emitting element, and a second optical element disposed on or near the output axis. Elements, and
The second optical element receives at least a part of the light from the semiconductor light emitting element from a position where the light passes through the emission portion from a position from the position where the light passes through the second optical element to the emission axis. The light beam is refracted so that the distance to the output axis becomes larger.

  According to the vehicular lamp configured as described above, light in the vicinity of the emission axis of the semiconductor light emitting element having relatively high emission intensity can be emitted from a portion of the emission portion that is away from the emission axis. As a result, when the lamp is viewed from the outside, it can be suppressed that a part of the light emitting portion of the light guide appears to be lit up.

  In the vehicular lamp according to the present invention, the light guide portion is formed in a plate shape, and the incident portion of the light guide portion extends from the incident portion toward the emission portion along the direction of the emission axis. You may form so that the thickness of the adjacent part which adjoins may become larger than the thickness of the said incident part. According to the vehicular lamp configured as described above, when the light guide is formed by pouring resin into the mold, the light guide can be formed with high dimensional accuracy.

  In the vehicular lamp according to the present invention, the light guide is formed in a plate shape extending in a first direction, and the light guide includes the incident portion and the light guide along the first direction. A plurality of second optical elements provided in the plurality of incident portions, each having a plurality of portions and a plurality of emission portions, wherein the semiconductor light emitting element is disposed at a position facing each of the incident portions. At least one has an inclined surface inclined with respect to the emission axis, and the inclined surface refracts light from the semiconductor light emitting element toward the center of the vehicle in a state where the inclined surface is mounted on the vehicle. Things can be used. According to the vehicular lamp configured as described above, the light from the semiconductor light emitting element is refracted toward the center of the vehicle by the second optical element having the inclined surface, so that the light is emitted from the vicinity of the emission axis of the semiconductor light emitting element. Light with high emission intensity can be irradiated, for example, as positioning lamp light.

  In the vehicular lamp according to the present invention, the light guide is formed in a plate shape extending in a first direction, and the light guide includes the incident portion and the light guide along the first direction. A plurality of light emitting portions and a plurality of light emitting portions, and the semiconductor light emitting elements are disposed at positions facing the light incident portions, respectively, and the light incident portions are arranged on the first optical element in the first direction. A third optical element is provided on each side, and light passing through the third optical element is internally reflected in a direction parallel to the emission axis between the incident portions in the first direction. An inner surface reflection portion may be formed, and the plurality of emission portions may be connected in the first direction to form a band-like continuous emission surface extending in the first direction. According to the vehicular lamp configured as described above, the light of the semiconductor light emitting element is further emitted by the first optical element, the second optical element, and the third optical element while suppressing the flashing by the second optical element. Uniform light can be emitted from the continuous emission surface by guiding to the emission part evenly.

  In the vehicle lamp of the present invention, the light guide is formed in a plate shape, and is emitted from the semiconductor light emitting element at a position facing a side surface between the incident portion and the emission portion in the light guide portion. There may be provided a reflecting portion that reflects a part of the light that has not been incident on the incident portion toward the front of the vehicle in a state of being mounted on the vehicle. According to the vehicular lamp configured as described above, the light use efficiency of the semiconductor light emitting element can be increased.

  In the vehicular lamp according to the present invention, the light guide is formed in a plate shape extending in a first direction, and the light guide portion includes a second that intersects both the emission axis and the first direction. In this direction, an extension part extending in a plate shape from the emission part is formed, and a positioning element for positioning the light guide at a predetermined distance from the emission part is formed in the extension part May be. According to the vehicular lamp having the above configuration, the light guide can be easily positioned at a predetermined position by the positioning element. In addition, since the positioning element is provided at a position that is a predetermined length away from the emitting portion in the extending portion, it is difficult for light from the semiconductor light emitting element to reach. For this reason, it is possible to suppress the flashing caused by irradiating the positioning element with light from the semiconductor light emitting element and causing irregular reflection.

  ADVANTAGE OF THE INVENTION According to this invention, the spotlight of the light emitted from a semiconductor light-emitting element can be suppressed.

It is a horizontal sectional view of the vehicular lamp concerning the embodiment of the present invention. It is a figure for demonstrating the structure of the vehicle lamp which concerns on embodiment of this invention, (a) in a figure is a BB sectional drawing in FIG. 1, (b) in a figure is light guide. It is a partial expanded sectional view of a body. It is the elements on larger scale of the lamp for demonstrating an example of the path | route of light. It is the elements on larger scale of the lamp for demonstrating an example of the path | route of light. It is the elements on larger scale of the lamp for demonstrating an example of the path | route of light.

Hereinafter, an example of an embodiment of a vehicular lamp according to the present invention will be described with reference to the drawings.
FIG. 1 is a horizontal sectional view of a vehicular lamp according to an embodiment of the present invention. 2 is a view for explaining the configuration of the vehicular lamp, (a) is a cross-sectional view taken along line BB in FIG. 1, and (b) is a partially enlarged cross-sectional view of the light guide. is there.

  As shown in FIGS. 1 and 2, a vehicular lamp 10 according to the present embodiment includes a resin lamp body 11 having a shape in which the front side of the lamp (the left side of FIG. 2A) is opened, and a lamp A transparent resin outer cover 12 attached to the opening of the body 11 is provided. The outer cover 12 is disposed so as to close the opening of the lamp body 11 from the front, and forms a lamp chamber S between the outer cover 12 and the lamp body 11. The vehicular lamp 10 is used as, for example, daylight running lights (DRL) for vehicles. This vehicular lamp 10 is mounted on each of the left and right sides of the front portion of the vehicle. In addition, the vehicular lamp 10 is disposed so as to be inclined rearward from the center side of the vehicle toward the side of the vehicle while being mounted on the vehicle. The vehicular lamp 10 of this embodiment is mounted on a vehicle with the right side in FIG. 1 directed toward the center of the vehicle.

  The vehicular lamp 10 includes a lamp unit 20 in a lamp chamber S formed by a lamp body 11 and an outer cover 12. A part of the lamp unit 20 is supported by a resin frame 53 fixed to the lamp body 11.

  The lamp unit 20 includes a semiconductor light emitting element 21 as a light source and a light guide 30. The light guide 30 is formed by injection molding a resin having translucency. The light guide 30 includes an incident part 31 on which light emitted from the semiconductor light emitting element 21 is incident, a light guide part 32 that guides light incident on the incident part 31, and a light guide part 32. And an emission part 33 for emitting the emitted light.

  The light guide 30 is formed in a plate shape extending in the left-right direction (an example of the first direction) indicated by an arrow A in FIG. 1, and the light guide 30 includes an incident portion 31, a light guide portion 32, and A plurality (five in this example) of emitting portions 33 are provided along the left-right direction. The light guide 30 includes a protruding portion 30a that protrudes laterally around the light guide 30. And the semiconductor light emitting element 21 is arrange | positioned in the position facing each incident part 31, respectively.

  Each of the plurality of semiconductor light emitting elements 21 is, for example, a white light emitting diode (LED) having a light emitting portion having a size of about 1 mm square. The semiconductor light emitting element 21 emits light substantially uniformly in the vertical and horizontal directions from the light emitting surface 21a toward the front of the lamp. These semiconductor light emitting elements 21 are mounted on the FPC 51 so that the mounting surface 21 b opposite to the light emitting surface 21 a faces the flexible printed circuit board (hereinafter referred to as FPC) 51. On the back side of the FPC 51, a plurality of aluminum heat sinks 52 for diffusing heat generated from the semiconductor light emitting elements 21 and the FPC 51 are arranged. The heat sink 52 is fixed to the frame 53, whereby the FPC 51 on which the semiconductor light emitting element 21 is mounted is supported on the frame 53 through the heat sink 52.

  The frame 53 includes a support plate portion 54 and a fixed plate portion 55 that are disposed substantially vertically, and a flat plate portion 56 that is disposed horizontally. The support plate portion 54 extends upward from the rear end of the flat plate portion 56, and the fixed plate portion 55 extends downward from the front end of the flat plate portion 56. The flat plate portion 56 is disposed at a position facing the lower surface 30 b that is a side surface between the incident portion 31 and the emission portion 33 in the light guide 30. The flat plate portion 56 has light from the semiconductor light emitting element 21. The reflection part 57 which reflects a part of is provided.

  In addition, the light guide 30 has a vertical direction (an example of a second direction) that intersects the light emitting axis Ax of the light from the semiconductor light emitting element 21 so as to be substantially orthogonal to both the horizontal direction from the lower end on the light emitting portion 33 side. A plate-like extension portion 60 extending downward is formed. The extending portion 60 includes a first extending portion 61 that extends downward from the lower end on the emitting portion 33 side, and a second extending portion 62 that refracts and extends rearward from the lower end of the first extending portion 61. And a third extending portion 63 that extends downward from the rear end of the second extending portion 62. A through hole 63 a (an example of a positioning element) penetrating in the front-rear direction is formed in the third extending portion 63 at a position away from the emitting portion 33 by a predetermined length. The light guide 30 is positioned with respect to the frame 53 by inserting the projecting pins 55 a provided on the fixing plate portion 55 of the frame 53 into the through holes 63 a. In such a state, the light guide 30 is inserted by inserting a screw or the like into a fixing through hole (not shown) formed in the vicinity of the through hole 63a and further to the fixing plate portion 55. Is fixed to the frame 53.

  An extension 65 is provided in the lamp chamber S. The extension 65 is disposed below the front side of the lamp unit 20, and the extension 65 covers the lower side of the front side of the lamp unit 20.

  In the lamp chamber S, a blocking plate 50 that covers the gap between the lamp body 11 and the lamp unit 20 when viewed from the outer cover 12 side is provided, and a protruding portion 30a around the light guide 30 is provided. The lamp is mounted on the back side of the closing plate 50 in front view.

Next, a specific structure of the light guide 30 will be described.
As shown in FIGS. 1 and 2, each incident part 31 includes a first incident part 71 (an example of a first optical element) and a second incident part 72 (an example of a second optical element, 72A or 72B) and a third incident portion 76 (an example of a third optical element).

  The 1st incident part 71 consists of a curved surface which protrudes slightly toward the semiconductor light-emitting device 21, for example, is a parabolic curve in the horizontal sectional view. The first incident portion 71 is a curved surface having a radius of curvature that refracts the light incident from the semiconductor light emitting element 21 so as to become parallel light substantially parallel to the emission axis Ax.

  Light guide protrusions 75 are formed on both sides of the first incident portion 71 in the left-right direction. The light guide protrusion 75 has a third incident portion 76 on the semiconductor light emitting element 21 side, and has an internal reflection surface 77 on the opposite side to the semiconductor light emitting element 21.

  Among the plurality of incident portions 31, at least one (first, fourth, fifth from the center side) second incident portion 72 is a convex second incident portion 72A. 72 A of 2nd incident parts consist of a curved surface which protrudes toward the semiconductor light-emitting device 21, for example, is made into the elliptic curve in the horizontal sectional view. The second incident portion 72 </ b> A is disposed on the emission axis Ax of the semiconductor light emitting element 21. The radius of curvature of the second incident portion 72A is smaller than the radius of curvature of the first incident portion 71.

  In addition, at least one (second and third from the center side) second incident portion 72 among the plurality of incident portions 31 is a concave second incident portion 72B. The second incident portion 72 </ b> B has an inclined surface 73 that is inclined with respect to the emission axis Ax of the semiconductor light emitting element 21. The second incident part 72 </ b> B is provided on the emission axis Ax of the semiconductor light emitting element 21.

  The emission unit 33 emits light from the semiconductor light emitting element 21 that has passed through the light guide unit 32. These emitting portions 33 are integrally provided so as to be connected in the left-right direction, whereby the front side of the light guide 30 is a strip-like continuous emission extending in the left-right direction along the shape of the outer cover 12. A surface 81 is provided. A plurality of steps 82 formed of minute curved convex cylindrical surfaces along the vertical direction are arranged in the emitting portion 33.

  Moreover, the light guide part 32 of the light guide 30 is formed in plate shape. In the light guide portion 32, the thickness of the adjacent portion 32 a (see FIG. 2B) adjacent to the incident portion 31 is changed from the incident portion 31 to the emission portion 33 along the direction of the emission axis Ax of the semiconductor light emitting element 21. As it goes, it is formed so as to be larger than the thickness T of the incident portion 31.

  In addition, a plurality of steps formed by cylindrical curved convex surfaces along the front-rear direction are formed near the emission part 33 on the upper surface of the light guide part 32 of the light guide 30. By these steps, when the lamp is viewed from the outside, the inside of the lamp (for example, the semiconductor light emitting element 21) can be prevented from being seen through from above.

Next, the optical path in the vehicular lamp 10 according to the present embodiment will be described.
When electricity is supplied to each semiconductor light emitting element 21, these semiconductor light emitting elements 21 are turned on. Then, the light emitted from the semiconductor light emitting element 21 enters the first incident portion 71, the second incident portions 72A and 72B, and the third incident portion 76.

  First, an optical path incident from the incident part 31 having the second incident part 72A will be described. FIG. 3 is a partially enlarged view of the light guide 30 for explaining an optical path incident from the incident part 31 having the second incident part 72A.

  As shown in FIG. 3, the light L <b> 1 that has entered the first incident portion 71 is refracted by the first incident portion 71 so as to be parallel to the emission axis Ax of the semiconductor light emitting element 21. The light L1 refracted in this way is guided as parallel light substantially parallel to the emission axis Ax through the inside of the light guide 32, and then diffused in the left-right direction in step 82 to irradiate a certain area outside the lamp. In this way, the light is emitted from the emission part 33.

  The light L2 incident on the second incident portion 72A is refracted by the second incident portion 72A, guided inside the light guide portion 32, diffused in step 82, and emitted from the emission portion 33. .

  Here, the light L <b> 2 is refracted so as to be condensed inside the light guide portion 32 by the second incident portion 72 </ b> A having a smaller radius of curvature than the first incident portion 71. In this example, the light L2 refracted by the second incident portion 72A is incident on the second incident portion 72A with respect to the angle θ1 formed with the output axis Ax before being incident on the second incident portion 72A. The angle θ2 formed with the output axis Ax is guided so as to increase. As described above, the light L2 incident on the second incident portion 72A is the light L2 with respect to the distance Da from the incident position X where the light L2 passes through the second incident portion 72A to the emission axis Ax. The light is refracted so that the distance Db from the emission position Y passing through the emission part 33 to the emission axis Ax becomes larger. Then, the light L2 refracted by the second incident portion 72A in this way reaches a portion of the emission portion 33 away from the emission axis Ax, is diffused in step 82, and irradiates a certain region outside the lamp. In this way, the light is emitted from the emission part 33.

  The light L3 incident on the third incident portion 76 is internally reflected at the inner surface reflecting surface 77 in a direction closer to the output axis Ax. The light L3 reflected in this way is guided as parallel light substantially parallel to the output axis Ax through the inside of the light guide section 32, and then diffused in step 82 so as to irradiate a certain area outside the lamp. The light is emitted from the portion 33.

  As shown in FIG. 2A, part of the light L <b> 4 that is not incident on the incident portion 31 of the light guide 30 among the light of the semiconductor light emitting element 21 is incident on the incident portion 31 in the light guide 30. And the reflecting portion 57 of the flat plate portion 56 of the frame 53 provided at a position facing the lower surface 30b that is the side surface between the light emitting portion 33 and the light emitting portion 33. The light L4 reflected by the reflecting portion 57 is irradiated forward of the lamp through a plate-like extending portion 60 that extends downward from the lower end of the light guide 30 on the emitting portion 33 side.

  Next, an optical path incident from the incident part 31 having the second incident part 72B will be described. FIG. 4 is a partially enlarged view of the light guide 30 for explaining an optical path incident from the incident part 31 having the second incident part 72B.

  As shown in FIG. 4, the light L2 refracted by the inclined surface 73 of the second incident portion 72B is incident on the inclined surface 73 with respect to the angle θ1 formed with the emission axis Ax before entering the inclined surface 73. The light is refracted toward the center of the vehicle so that the angle θ2 formed with the rear emission axis Ax increases. In this example, the inclined surface 73 of the second incident portion 72B is refracted by about 45 ° toward the center of the vehicle. In this way, the light L2 incident on the second incident portion 72B has a distance Da from the incident position X where the light L2 passes through the inclined surface 73 of the second incident portion 72B to the emission axis Ax. The light L2 is refracted so that the distance Db from the emission position Y through the emission part 33 to the emission axis Ax becomes larger.

  The light L2 that is refracted toward the center of the vehicle by the second incident portion 72B in this way is emitted from a portion of the emission portion 33 that is far away from the emission axis Ax.

  By the way, when the second incident portion 72B is provided at the center side end portion of the vehicle, the light L2 that is largely refracted toward the vehicle central side by the inclined surface 73 of the second incident portion 72B is blocked by the vehicle body or the like. However, since the second incident portion 72B is disposed at a position other than the end portion on the center side of the vehicle, the light L2 refracted by the inclined surface 73 of the second incident portion 72B is reflected. It is not blocked by the vehicle body.

  As described above, according to the vehicular lamp 10 according to the present embodiment, the incident portion 31 of the light guide 30 is provided with the second incident portion 72 (72A or 72B). As a result, light in the vicinity of the emission axis Ax of the semiconductor light emitting element 21 having relatively high emission intensity can be emitted from a portion of the emission portion 33 that is away from the emission axis Ax. As a result, when the lamp is viewed from the outside, it can be suppressed that a part of the emission part 33 of the light guide 30 appears to be lit up.

  According to the configuration in which the convex second incident portion 72 </ b> A is provided in the incident portion 31, the light in the vicinity of the emission axis Ax of the semiconductor light emitting element 21 having relatively strong emission intensity is separated from the emission axis Ax in the emission portion 33. After reaching the part, the light is diffused in step 82 and emitted from the emitting part 33 so as to irradiate a certain area outside the lamp. In this way, the light from the semiconductor light emitting element 21 can be uniformly guided to the emission part 33 and the uniform light can be emitted from the emission part 33.

  In addition, according to the configuration in which the concave second incident portion 72B is provided in the incident portion 31, light in the vicinity of the emission axis Ax of the semiconductor light emitting element 21 having relatively high emission intensity is transmitted from the emission axis Ax in the emission portion 33. The light can be emitted from a distant part. In this example, the second incident portion 72A refracts the light L2 from the semiconductor light emitting element 21 by about 45 ° with respect to the emission axis Ax toward the center of the vehicle on which the vehicle lamp 10 is mounted. In this way, light with high emission intensity emitted from the vicinity of the emission axis Ax of the semiconductor light emitting element 21 can be used as, for example, light for a positioning lamp (vehicle width lamp).

  Moreover, the light guide part 32 formed in the plate shape of the light guide 30 is adjacent to the incident part 31 in the light guide part 32 as it goes from the incident part 31 to the emission part 33 along the direction of the emission axis Ax. The adjacent portion 32 a is formed so that the thickness is larger than the thickness T of the incident portion 31. For this reason, the incident part 31 of the light guide 30 can be shape | molded with high dimensional accuracy. That is, when the light guide 30 is molded by injection molding or the like by pouring a high temperature resin into the mold, the temperature of the resin starts to decrease from the incident portion 31 having a relatively small thickness, and is faster than the adjacent portion 32a. Mass molded. Thus, as a result of the incident part 31 having the first incident part 71 and the second incident part 72 being cooled and solidified faster than the adjacent part 32a, the first incident part 71 formed in the incident part 31 and High dimensional accuracy of the shape of the second incident portion 72 can be ensured.

  Further, a light guide protrusion 75 having a third incident portion 76 and an inner reflection surface 77 is provided. For this reason, the light of the semiconductor light-emitting element 21 is more evenly emitted by the first incident part 71, the second incident part 72, and the light guide protrusion 75 while suppressing the flashing by the second incident part 72. It is possible to guide the light to 33 and emit uniform light from the emitting portion 33. Therefore, the light from each semiconductor light emitting element 21 can be uniformly emitted from the entire belt-like continuous emission surface 81 extending in the left-right direction.

  In addition, the light guide 30 is formed with a plate-like extending portion 60 extending in the up-down direction intersecting the emission axis Ax and the left-right direction. The extending portion 60 includes a first extending portion 61, a second extending portion 62, and a third extending portion 63. The third extending portion 63 has a positioning through hole 63a. Is provided. For this reason, the light guide 30 can be easily positioned with respect to the frame 53 by inserting the protruding pins 55a of the fixed plate portion 55 into the through holes 63a of the third extending portion. Moreover, since the 1st extension part 61 and the 2nd extension part 62 exist between the 3rd extension part 63 in which the through-hole 63a was formed, and the output part 33, it radiate | emits from the semiconductor light-emitting device 21. Of the light guided through the light guide portion 32, the light reaching the through hole 63a is attenuated and becomes very small. Moreover, the light which reaches | attains the radiation | emission part 33 among the light locally scattered by the through-hole 63a is also attenuated. Therefore, when the state in which the semiconductor light emitting element 21 is lit is viewed from the front, it is possible to make the light scattered in the through hole 63a appear to be emitted uniformly without being noticeable.

  Further, the light emitting body 21 of the semiconductor light emitting element 21 that is emitted from the semiconductor light emitting element 21 and is not incident on the incident section 31 is positioned at a position facing the lower surface 30b that is a side surface between the incident section 31 and the emitting section 33 of the light guide 30. A reflecting portion 57 that reflects a part of the light L4 toward the front of the vehicular lamp 10 is provided. For this reason, the utilization efficiency of the light from the semiconductor light emitting element 21 can be increased.

  In addition, this invention is not limited to embodiment mentioned above, A deformation | transformation, improvement, etc. are possible suitably. In addition, the material, shape, dimension, numerical value, form, number, arrangement location, and the like of each component in the above-described embodiment are arbitrary and are not limited as long as the present invention can be achieved.

  For example, in the above embodiment, the second incident portion 72B having the inclined surface 73 is formed by forming the concave portion in the incident portion 31, but the convex portion is formed in the incident portion 31 as shown in FIG. Thus, the second incident portion 72C having the inclined surface 73 may be formed.

  Also in this modified example, the light L2 incident from the semiconductor light emitting element 21 is refracted in the same manner as in the embodiment of FIG. As a result, light in the vicinity of the emission axis Ax of the semiconductor light emitting element 21 having relatively high emission intensity can be emitted from a portion of the emission portion 33 that is away from the emission axis Ax. As a result, when the lamp is viewed from the outside, it can be suppressed that a part of the emission part 33 of the light guide 30 appears to be lit up.

  Also in the case of this modification, the light L2 incident on the second incident portion 72C can be used as the light of the positioning lamp (vehicle width lamp) as in the embodiment of FIG.

  Moreover, in the said embodiment, although the 2nd incident part 72 (72A, 72B, 72C) was arrange | positioned on the output axis | shaft Ax of the semiconductor light-emitting device 21, the 2nd incident part 72 is the semiconductor light-emitting device 21 of FIG. You may arrange | position in the vicinity of the output axis Ax. The vicinity of the emission axis is an area where light having a relatively high emission intensity is emitted. For example, an area having an emission intensity that can cause flashing when the light in the area is directly emitted to the outside. It is. Therefore, even when the second incident portion 72 is arranged in the vicinity of the emission axis, the effect of suppressing the flashing is obtained to the extent that it is close to the case where it is arranged on the emission axis.

DESCRIPTION OF SYMBOLS 10: Vehicle lamp, 21: Semiconductor light-emitting device, 30: Light guide, 31: Incident part, 32: Light guide part, 32a: Adjacent part, 33: Output part, 57: Reflection part, 60: Extension part, 63a: (an example of a positioning element), 71: a first incident part (an example of a first optical element), 72, 72A: a second incident part (an example of a second optical element), 73: an inclined surface, 75: Light guide protrusion, 76: Third incident part (an example of a third optical element), 77: Internal reflection part, 81: Continuous emission surface, Ax: Output axis

Claims (6)

A semiconductor light emitting device as a light source;
An incident portion into which light emitted from the semiconductor light emitting element is incident; a light guide portion that guides light incident on the incident portion; and an emission portion that emits light guided by the light guide portion; A light guide having
With
The incident portion includes a first optical element that refracts light from the semiconductor light emitting element in a direction parallel to the output axis of the semiconductor light emitting element, and a second optical element disposed on or near the output axis. Elements, and
The second optical element receives at least a part of the light from the semiconductor light emitting element from a position where the light passes through the emission portion from a position from the position where the light passes through the second optical element to the emission axis. A vehicular lamp characterized by being refracted so that a distance to the emission axis becomes larger. The light guide is formed in a plate shape,
The thickness of the adjacent portion adjacent to the incident portion of the light guide portion is larger than the thickness of the incident portion as it goes from the incident portion to the emission portion along the direction of the emission axis. The vehicular lamp according to claim 1, wherein the vehicular lamp is provided. The light guide is formed in a plate shape extending in the first direction,
A plurality of the incident portion, the light guide portion, and the emission portion are formed in the light guide body along the first direction, respectively.
Each of the semiconductor light emitting elements is disposed at a position facing each of the incident portions,
At least one of the plurality of second optical elements provided in the plurality of incident portions has an inclined surface inclined with respect to the emission axis,
3. The vehicular lamp according to claim 1, wherein the inclined surface refracts light from the semiconductor light emitting element toward a center side of the vehicle when mounted on the vehicle. The light guide is formed in a plate shape extending in the first direction,
A plurality of the incident portion, the light guide portion, and the emission portion are formed in the light guide body along the first direction, respectively.
Each of the semiconductor light emitting elements is disposed at a position facing each of the incident portions,
Each of the incident portions has a third optical element on each side of the first optical element in the first direction,
Between each of the incident portions in the first direction, an inner surface reflection portion that internally reflects light that has passed through the third optical element to be parallel to the emission axis is formed,
4. The belt-like continuous emission surface extending in the first direction is formed by connecting a plurality of the emission parts in the first direction. 5. Vehicle lamps. The light guide is formed in a plate shape,
A state in which a part of light emitted from the semiconductor light emitting element and not incident on the incident portion is mounted on the vehicle at a position facing the side surface between the incident portion and the emission portion in the light guide portion. 5. A vehicular lamp according to claim 1, further comprising a reflecting portion that reflects toward the front of the vehicle. The light guide is formed in a plate shape extending in the first direction,
The light guide is formed with an extending portion extending in a plate shape from the emitting portion in a second direction intersecting both the emitting axis and the first direction. The vehicular lamp according to any one of claims 1 to 5, wherein a positioning element for positioning the light guide is formed at a position away from the emitting portion by a predetermined length.

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