WO2023032713A1

WO2023032713A1 - Vehicle lamp

Info

Publication number: WO2023032713A1
Application number: PCT/JP2022/031381
Authority: WO
Inventors: 梢太花見
Original assignee: 株式会社小糸製作所
Priority date: 2021-09-02
Filing date: 2022-08-19
Publication date: 2023-03-09
Also published as: JP2023036360A

Abstract

Provided is a vehicle lamp that increases the variations of light emission patterns formed by reflection steps in a light-guiding body and enables light emission that has a high design effect. The vehicle lamp comprises the light-guiding body (1) that: has a plurality of reflection steps (14) formed on at least one surface (light reflection surface) (12); guides light incident from a light source (21); reflects the guided light from the reflection steps (14); and emits the light from another surface (light emission surface) (11). The reflection steps (14) comprise reflection steps (141–143) of differing sizes and the amount of light reflected from these reflection steps (141–143) differs. The plurality of reflection steps (141–143) have the same diffusion angle for the reflected light.

Description

vehicle lamp

The present invention relates to a lamp installed in a vehicle such as an automobile, and more particularly to a vehicle lamp that uses a light guide and has a high design effect.

As one of automotive lamps, a light guide is arranged in a part of the lamp, and light from a light source is incident on the light guide, and light guided inside the light guide is sent to the light guide. There has been proposed a lamp that is configured to reflect light at a reflection step provided and illuminate the front of the lamp. In Patent Document 1, a reflecting step is formed on the front surface of a light guide, and the light guided inside the light guide is reflected by the reflecting step to be emitted from the rear surface of the light guide, and furthermore, the emitted light is emitted from the rear surface of the light guide. A lamp has been proposed in which light is reflected by a reflector and emitted forward. According to Patent Document 1, a lamp is obtained in which a light guide body emits light with substantially uniform brightness in a form similar to surface emission.

Further, in Patent Document 2, a plurality of reflection steps formed in an optical member (light guide) increase the intensity of light reflected in a specific direction, respectively, and emit a plurality of lights with the increased intensity. There has been proposed a lamp that is arranged on a plane to form a striped light emission pattern with increased brightness.

Furthermore, Patent Document 3 proposes a lamp in which a plurality of reflection steps with different shapes and sizes are formed on a light guide. This technique makes the light emitting surface of the lamp symmetrical with respect to the front of the vehicle by differentiating the light reflecting direction of each reflecting step.

JP 2013-235729 A JP 2020-24867 A JP 2020-77470 A

In the techniques of

Patent Documents

1 and 2, the reflecting steps formed on the light guide have a uniform configuration, and the amount of reflected light is substantially the same in both reflecting steps. Further, in the technique of Patent Document 3, reflection steps having different shapes and sizes are formed, but the amount of light reflected at each reflection step is not particularly different and is substantially the same.

As described above, the techniques of Patent Documents 1 to 3 are all capable of forming a light emission pattern with uniform brightness or a light emission pattern having a desired pattern shape with the light reflected in the reflection step. No particular consideration is given to forming a light emission pattern by varying the amount of light reflected in the reflection step and emitted from the light guide. Therefore, the formed light emission pattern has little variation, and it is difficult to perform light emission with a high design effect.

An object of the present invention is to provide a vehicular lamp capable of increasing the variation of the light emission pattern formed by the reflection steps of the light guide and emitting light with a high design effect.

The present invention comprises a light guide having a plurality of reflection steps formed on at least one surface, guiding light incident from a light source, reflecting the guided light in the reflection step, and emitting the light from the other surface. The vehicular lamp is characterized in that the reflecting steps include a plurality of reflecting steps of the same size and different sizes, and the reflecting steps reflect different amounts of light.

In the present invention, it is preferable that the divergence angles of the reflected light are the same in the plurality of light reflection steps. For example, the plurality of reflection steps are composed of spherical recesses provided in the surface of the light guide, and the ratio (R/D) of the radial dimension R to the depth D is constant.

Also, in the present invention, the light emission pattern includes a plurality of light emission patterns each formed by light reflected in a plurality of reflection steps. In this case, the plurality of light emission patterns are composed of a high-brightness light emission pattern formed by relatively large-sized reflection steps and a low-brightness light emission pattern formed by relatively small-sized reflection steps. be done. For example, among the plurality of light emission patterns, light emission patterns with low brightness are shadow patterns, and patterns with high brightness are visually recognized stereoscopically.

As a preferred form of the present invention, the light guide is formed in a plate shape, light from a light source is incident from at least one end surface, and a plurality of reflection steps are formed on one plate surface intersecting this surface. It is configured such that the light reflected by the reflection step is emitted from the other plate surface on the opposite side of the surface. A part of the other surface of the light guide is preferably formed as a light diffusion surface for diffusing emitted light. Alternatively, as another form, the light guide has a configuration in which reflection steps are formed on each of one and the other plate surfaces, and the light reflected by each reflection step is emitted from the opposite plate surface. It is preferable to provide first and second reflecting mirrors for reflecting the light emitted from the plate surface in the same direction.

According to the present invention, the luminescence pattern formed by the reflection step of the light guide can be a luminescence pattern of various forms such as a luminescence pattern with different brightness, for example. be able to.

1 is an external view of an automobile equipped with the vehicle lamp of the present invention and a partially broken front view of a headlamp; FIG. FIG. 2 is a perspective view of the clearance lamp unit of Embodiment 1 as seen from the rear side and an enlarged view of a part thereof; (a) is a front view of the clearance lamp unit of Embodiment 1, and (b) and (c) are enlarged sectional views taken along line bb and cc of (a), respectively. (a) is a conceptual diagram explaining the visibility at the time of non-lighting of Embodiment 1, (b) is a conceptual diagram explaining the visibility at the time of lighting of Embodiment 1. FIG. (a) is a front view of the clearance lamp unit of Embodiment 2, (b) is an enlarged sectional view in each region. FIG. 11 is a conceptual diagram for explaining visibility at the time of lighting according to the second embodiment; (a) is a front view of a clearance lamp unit of Embodiment 3, and (b) is an enlarged cross-sectional view taken along the line bb. FIG. 11 is a conceptual diagram for explaining the visibility at the time of lighting according to the third embodiment; FIG. 11 is a schematic perspective view of a clearance lamp unit according to Embodiment 4; FIG. 11 is a schematic side view of a clearance lamp unit according to Embodiment 4; (a) is a conceptual diagram explaining the visibility at the time of non-lighting of Embodiment 4, (b) is a conceptual diagram explaining the visibility at the time of lighting of Embodiment 4. [FIG.

(Embodiment 1)
Next, Embodiment 1 of the present invention will be described with reference to the drawings. FIG. 1 is an external view of an automobile CAR in which the lamp of the present invention is applied to left and right headlamps L-HL and R-HL arranged in the front part of the vehicle body. These headlamps L-HL and R-HL have a bilaterally symmetrical configuration, and as shown in FIG. The turn signal lamp unit TSLU and the clearance lamp unit CLU are combined.

In the left headlamp L-HL, lamp units LoLU, HiLU, TSLU, and CLU are arranged in a lamp housing 100 composed of a lamp body 101 and a translucent cover (outer lens) 102 . The translucent cover 102 is made of a colorless (white) translucent resin. The present invention is applied to the clearance lamp unit CLU, and when the clearance lamp unit CLU is turned on, a desired light emission pattern is formed on its light emission surface. The description of the low beam lamp unit LoLU, the high beam lamp unit HiLU, and the turn signal lamp unit TSLU is omitted because they have little relevance to the present invention.

Fig. 2 is a perspective view of the clearance lamp unit CLU as seen from the back direction. The clearance lamp unit CLU includes a plate-like light guide 1 made of a translucent member such as colorless transparent resin that functions as an inner lens, and is supported by the lamp body 101 by a support member not shown in the figure. . The light guide 1 has both sides in the plate thickness direction, that is, the plate surfaces are arranged in the front-rear direction along the optical axis of the clearance lamp unit CLU. It is configured as a plane and faces the translucent cover 102 . The plate surface of the light guide 1 may be a flat surface or a curved surface gently curved along the translucent cover 102, but is formed flat here.

In addition, the upward facing end surface of the light guide 1 is configured as a light incident surface, and the light source substrate 2 is arranged along this light incident surface 13 . A plurality of LEDs (light emitting diodes) 21 , here three, are arranged and mounted along the light incident surface 13 on the light source substrate 2 . Each LED 21 is configured as a white LED that emits white light, and the light emitted from each is incident on the light incident surface 13 of the light guide 1 and guided inside the light guide 1 . there is

The other plate surface of the light guide 1, that is, the plate surface 12 on the opposite side of the light emitting surface 11 is configured as a light reflecting surface. ing. The reflecting step 14 reflects the light guided inside the light guide 1 and causes the light to emerge from the light exit surface 11 .

In the first embodiment, as will be described later with reference to FIG. 4, when the clearance lamp unit CLU is turned on, the light emitted from the light emitting surface 11 of the light guide 1 changes the brightness (luminous intensity). The reflective step 14 is configured so that the first to third stripe patterns SP1 to SP3, which are different from each other, emit light. Here, the first stripe pattern SP1 emits the brightest light, and the second stripe pattern SP2 and the third stripe pattern SP3 are configured to decrease in order of brightness.

FIG. 3(a) is a front view of the clearance lamp unit CLU, and the reflection steps 14 formed on the light reflection surface 12 of the light guide 1 correspond to the first to third stripe patterns SP1 to SP3. At each position, they are arranged in the form of orthogonal grids or oblique grids with predetermined vertical and horizontal pitch dimensions (intervals).

FIGS. 3(b) and 3(c) are enlarged cross-sectional views taken along lines bb and cc of FIG. 3(a). The reflecting step 14 formed on the light reflecting surface 12 is formed as a spherical concave portion that is spherically recessed from the surface of the light reflecting surface 12 . In addition, as shown in FIG. 3C, the diameters of the spherical concave portions of the reflecting steps 14 corresponding to the first to third stripe patterns SP1 to SP3 are different. That is, if the reflection steps 14 of the first to third stripe patterns SP1 to SP3 are respectively referred to as first to third reflection steps 141 to 143, the first to third reflection steps 141 to 143 are formed by the respective spherical concave portions. The diameter of the circle formed on the exit surface 12 is different. Here, the diameters of the reflection steps 141 to 143 are sequentially reduced from the first reflection step 141 to the third reflection step 143 . Therefore, the amount of light reflected by the reflecting steps 141 to 143 is reduced from the first reflecting step 141 to the third reflecting step 143 having a large diameter.

On the other hand, as shown in FIG. 3(c), the ratio (R/D) of the diameter dimension R to the depth D of each reflection step 141-143 is the same for each reflection step 141-143. That is, each reflection step 141 to 143 has a similar shape. In this way, by making the reflection steps 141 to 143 different in diameter, that is, in size, but similar in shape, the light is reflected by the reflection steps 141 to 143 as schematically indicated by the solid line arrows in FIG. The divergence angles of the light can be made equal.

In the clearance lamp unit CLU of Embodiment 1 having the above configuration, when not lit, external light enters the light exit surface 11 of the light guide 1 as indicated by the chain line arrow in FIG. Light is guided inside the light guide 1 in the plate thickness direction. A part of the guided light is transmitted through the light reflection surface 12 to the outside of the light guide 1 . Another part of the light is projected onto the reflection step 14 and guided inside the light guide 1 , and part of it passes through the light exit surface 11 and returns from the light guide 1 .

Observing the clearance lamp unit CLU from the front side of the automobile, the retroreflected light reflected by the reflecting step 14 is emitted from the light emitting surface 11 of the light guide 1, so as shown in FIG. A cluster of dot-like patterns is visually recognized. However, since this retroreflected light has a low luminous intensity, the visibility of each dot-like pattern is not clear. Therefore, the visibility of the first to third stripe patterns SP1 to SP3 is such that each shape can be vaguely observed.

When the clearance lamp unit is turned on, the LED 21 emits light as indicated by the solid arrow in FIG. The guided light is reflected at the reflecting step 14 and emitted from the light emitting surface 11 of the light guide 1 . At this time, as described above, the light reflected by the first to third reflection steps 141 to 143 has a larger amount of light than that of a smaller size. the angles are the same. Therefore, the reflected light from each of the reflection steps 141 to 143 forms a dot-like light emission pattern, and the size of each dot-like light emission pattern is substantially the same. That is, patterns of the same shape and size are formed regardless of the difference in size of the reflection steps 141-143. On the other hand, the brightness is proportional to the size of the reflection steps 141-143.

Then, the plurality of dot-like light emission patterns internally reflected in each of the reflection steps 141 to 143 are assembled to form the first to third stripe patterns SP1 to SP3, which are visible from the outside. The reflection steps 141 to 143 of the formed three stripe patterns SP1 to SP3 are different in size, and the size is reduced step by step from the first reflection step 141 to the third reflection step 143. As shown in FIG. 4B, among the three visible stripe patterns SP1 to SP3, the first stripe pattern SP1 appears brightest, and the brightness decreases in order from the second stripe pattern SP2 to the third stripe pattern SP3. be done. In addition, in FIG. 4B, areas with low filling density (density) are bright, and areas with high density are dark.

As described above, in the clearance lamp unit CLU of Embodiment 1 to which the present invention is applied, the three stripe patterns SP1 to SP3 can be vaguely observed or hardly observed due to the reflection step 14 provided on the light guide 1 when not lit. It is a degree of visibility. On the other hand, when lit, the three stripe patterns SP1 to SP3 are visually recognized with different brightness due to the different sizes of the three reflection steps 141 to 143 provided on the light guide 1. FIG. Therefore, the design effect during lighting is enhanced as compared with the case where the three stripe patterns SP1 to SP3 are viewed with uniform brightness. In addition, the design effect of the clearance lamp unit CLU is enhanced by changing the visibility of the three stripe patterns SP1 to SP3 depending on whether the lights are off or on.

(Embodiment 2)
FIG. 5 is a schematic configuration diagram of a second embodiment in which the present invention is applied to the clearance lamp unit CLU shown in FIG. Embodiment 2 is a mode in which the light emission pattern of the letter "K" (hereinafter referred to as "K pattern") is emitted three-dimensionally using the so-called "trompe l'oeil" principle.

FIG. 5(a) is a front view of the clearance lamp unit CLU of Embodiment 2. The light reflection surface 12 of the light guide 1 is divided into a plurality of regions for forming a light emission pattern, and each region has a different light emission pattern. A reflection step is formed. Each area is divided by a solid line, and includes a K pattern area a1 imitating the letter "K", a side area a2 along the K pattern area a1, a shadow pattern area a3 imitating the shadow of the K pattern, The other four areas of the background area a4 are partitioned.

Then, as shown in FIG. 5B which shows the cross section of the light guide 1 in each area, the K pattern area a1, the side surface area a2, and the background area a4 are formed of spherical concave portions as in the first embodiment. Steps 14 are formed in a grid-like manner. Here, the reflection step 141 of the K pattern area a1 is formed as a reflection step having the largest size, the reflection step 142 of the side area a2 is formed as a reflection step having a smaller size, and the reflection step 143 of the background area a4 is formed as a reflection step having a smaller size. Furthermore, it is formed as a small reflection step. On the other hand, although no reflective step is formed in the shadow pattern area a3, the smallest sized reflective step may be formed in some cases.

In the clearance lamp unit CLU of the second embodiment, when not lit, the K pattern area a1, the side area a2, and the background area a4 are reflected by the reflection step 14 formed on the light guide 1 as in the first embodiment. is the degree of visibility that can be vaguely observed.

On the other hand, when the LED 21 is turned on, the emitted light of the LED 21 is reflected by the reflecting step 14 of the light guide 1 and emitted from the light emitting surface 11. Therefore, when the clearance lamp unit CLU is observed from the front side of the automobile, the K pattern area a1 is observed as the brightest emission pattern because the size of the reflection step 141 is large. Also, since the size of the

reflective steps

142 and 143 is smaller than that of the side area a2 and the background area a4, they are observed as a relatively dark emission pattern. On the other hand, the shadow pattern area a3 is observed as the darkest pattern because there are no reflection steps.

As a result, as a whole, as shown in FIG. 6, a three-dimensional light emission pattern in which the bright K character pattern CP stands out from the relatively dark surroundings, that is, a "trompe l'oeil" light emission pattern is formed. As described above, in the second embodiment, a three-dimensional light emission pattern is formed at the time of lighting, so that the design effect of the clearance lamp unit CLU can be enhanced as compared with the case where a light and dark pattern is simply formed. Also in Embodiment 2, the difference between the visibility when the lamp is off and the visibility of the luminous pattern when the lamp is on is very noticeable, and the design effect of the clearance lamp unit CLU is enhanced.

(Embodiment 3)
FIG. 7(a) is a front view of a clearance lamp unit CLU of Embodiment 3 to which the present invention is applied. The basic configuration is the same as in

Embodiments

1 and 2, and equivalent parts are given the same reference numerals. In the third embodiment, the light reflecting surface 12 of the light guide 1 is formed with a large number of reflecting steps 14 for forming a desired pattern, here the K pattern CP similar to the second embodiment. A relatively large sized reflective step 141 is formed in the area a1 of the K pattern CP, and a smaller sized reflective step 143 is formed in the other background area a4.

On the other hand, in Embodiment 3, a partial region of the light exit surface 11 of the light guide 1 is configured as a light diffusion surface 15, as shown in the enlarged sectional view taken along line bb in FIG. The light diffusing surface 15 is formed by roughening the light emitting surface 11 of the light guide 1, but may be coated with a separate light diffusing material. This light diffusion surface 15 is formed in a region along the periphery so as to surround the K pattern CP. Alternatively, it may be formed in all regions except the K pattern CP.

Also in the third embodiment, the visibility when the clearance lamp unit CLU is not lit is the same as in the first and second embodiments. Further, when the LED 21 emits light during lighting, the light that has entered the light guide 1 and is guided is reflected by the reflecting step 14 and emitted from the light emitting surface 11 to obtain the visibility of the K pattern CP. . At this time, since the reflection step 141 of the area a1 of the large-sized K pattern CP has a larger amount of reflected light than the reflection step 143 of the small-sized background area a4, the light emission pattern of the bright K pattern CP appears in the dark background. visible.

In the third embodiment, in addition to this, the light reflected by the reflecting step 14 is emitted in a state of being diffused by the light diffusion surface 15 of the light emitting surface of the light guide 1 . Due to this diffusion, as schematically shown in FIG. 8, the periphery of the K pattern CP formed by the emitted light becomes blurred, and the sharpness and contrast of the periphery of the K pattern CP are reduced. . In this case, the sharpness and contrast of the portion extending along the periphery of the K pattern CP with a required width dimension, that is, the contour portion of the K pattern CP are reduced.

As a result, the K pattern CP becomes a pattern with a gradual gradation of brightness and darkness in the peripheral portion, for example, a soft-focused pattern, and the K pattern CP appears to stand out from the background area a4. Also, although illustration is omitted, in the case where the K pattern CP and the background area are each formed of squares, the light in the background area is diffused by the light diffusion surface, and thus, for example, the artist "Daniel Picon" Visibility similar to that of the optical illusion effect is obtained. Therefore, also in Embodiment 3, the visibility of the light emission pattern when lit is enhanced, and the difference between the visibility when lit and the visibility when not lit becomes significant, resulting in a design effect of the clearance lamp unit. is enhanced.

In Embodiment 3, the required visibility can be obtained even if the reflection steps are not formed in the background area. , it becomes possible to further enhance the stereoscopic illusion effect.

(Embodiment 4)
FIG. 9 is a schematic perspective view of a clearance lamp unit CLU of Embodiment 4 to which the present invention is applied, and FIG. 10 is a side structural view thereof. The light guide 1 is supported in the lamp housing 100 shown in FIG. 1 with its plate surface oriented substantially horizontally, that is, with its plate surface extended in the direction along the optical axis of the clearance lamp unit CLU. A light incident surface 13 of the light guide 1 faces rearward, and an LED 21 as a light source is arranged on the light incident surface 13, and the emitted light is made incident from the light incident surface 13 of the light guide 1. It's like

At least one of the upper plate surface 1U directed upward and the lower plate surface 1D directed downward of the light guide 1 is configured as a light reflecting surface. Here, both the upper plate surface 1U and the lower plate surface 1D are configured as light reflecting surfaces. That is, a large number of reflecting steps 14 each having a spherical concave portion are formed on each of the upper plate surface 1U and the lower plate surface 1D of the light guide 1, and these reflecting steps 14 form a light emission pattern, for example, in the embodiment. A K pattern CP similar to 2 and 3 is constructed. That is, a relatively large-sized reflective step 141 is formed in the region of the K pattern CP on the lower plate surface 1D, and a relatively small-sized reflective step 141 is formed in the background region surrounding the region of the K pattern CP on the upper plate surface 1U. A step 143 is formed.

On the other hand, an upper reflecting mirror 3U as a first reflecting mirror and a lower reflecting mirror 3U as a second reflecting mirror are provided at upper and lower positions of the light guide 1, respectively. A mirror 3D is provided. The light reflecting surfaces of the upper reflecting mirror 3U and the lower reflecting mirror 3D are set at an angle of approximately 45 degrees with respect to the upper plate surface 1U and the lower plate surface 1D of the light guide 1, respectively. Therefore, the upper reflecting mirror 3U and the lower reflecting mirror 3D are arranged symmetrically with the light guide 1 interposed therebetween, and are arranged so as to form a right angle (90 degrees) with each other. These reflecting

mirrors

3U and 3D have a structure in which aluminum or the like is vapor-deposited on the surface of a plate member to form a light reflecting surface, but other structures may be used. In order to improve the appearance of the clearance lamp unit CLU, a shielding member 103 is provided on a part of the translucent cover 102 to hide the ends of the upper reflecting mirror 3U and the lower reflecting mirror 3D. . A light reflecting film 16 is formed on the front face of the light guide 1 .

In the clearance lamp unit CLU of Embodiment 4, the light from the LED 21 is not emitted from the light guide body 1 when not lit, and the light guide body 1 has the upper plate surface 1U and the lower plate surface 1D in a substantially horizontal direction. Since it is directed, it is difficult to observe from the outside. Therefore, the K pattern due to the light guide 1 and the reflection steps 141 and 143 formed on the light guide 1 is hardly observed. Further, since the light guide 1 is a translucent member, light can pass through the light guide 1 between the upper reflecting mirror 3U and the lower reflecting mirror 3D. Since the upper reflecting mirror 3U and the lower reflecting mirror 3D are arranged substantially at right angles, they form a retroreflector (reflex reflector) as indicated by the dashed arrow in FIG. Therefore, as shown in FIG. 11(a), when the clearance lamp unit CLU is observed from the front of the automobile, the visibility is such that the retroreflector formed by the upper reflector 3U and the lower reflector 3D can be observed.

When the clearance lamp unit CLU is turned on, the light from the LED 21 is guided inside the light guide 1 as indicated by the solid line arrow in FIG. The light is emitted from the bottom surface of the light guide 1 . Another part of the light is reflected by the reflection step 141 on the lower plate surface 1D and emitted from the upper surface of the light guide 1. FIG. That is, the light reflected by the reflection step 141 of the K pattern CP on the lower plate surface 1D is emitted from the upper plate surface 1U, reflected by the upper reflecting mirror 3U, and irradiated as a relatively bright K pattern. The light reflected by the reflecting step 143 in the background area of the upper plate surface 1U is emitted from the lower plate surface 1D, reflected by the lower reflecting mirror 3D, and irradiated as a relatively dark background pattern.

As a result, as shown in FIG. 11(b), the visibility is such that the bright K pattern CP is observed in the dark background area. At this time, since the K pattern CP is brighter than the background area, it can be expected that the K pattern can be seen to stand out in the same way as in the second and third embodiments. As described above, also in the fourth embodiment, the difference between the visibility of the light emission pattern when lit and the visibility when not lit becomes extremely noticeable, and the design effect of the clearance lamp unit CLU is enhanced.

The first to fourth embodiments described above are examples of the present invention, and may be applied to lamp units other than clearance lamp units, such as daytime running lamp units and tail lamp units. Also, the light emission pattern is not limited to the stripe pattern or K pattern described in the embodiments, and various patterns can be applied.

In addition, if the reflection step formed on the light guide is such that the amount of reflected light is different but the divergence of the reflected light is substantially the same, the reflection step is formed of the spherical concave portion described in the embodiment. The shape is not limited to the step shape, and may be a step shape consisting of a conical concave portion, a pyramidal concave portion, or other step shapes.

This international application claims priority based on Japanese Patent Application No. 2021-143365 filed on September 2, 2021, which is Japanese Patent Application No. 2021-143365. The entire contents of this International Application are incorporated by reference.

The foregoing descriptions of specific embodiments of the invention have been presented for purposes of illustration. They are not intended to be exhaustive or to limit the invention to the precise forms described. Those skilled in the art will appreciate that many variations and modifications are possible in light of the above description.

1 light guide 2

light source substrate

3U, 3D reflector 11 light exit surface 12 light reflection surface 13 light entrance surface 14 (141, 142, 143) reflection step 15 light diffusion surface 21 light source (LED)
100 Lamp housing 101 Lamp body 102 Translucent cover L-HL, R-HL Head lamp CLU Clearance lamp unit SP Stripe pattern CP K pattern (character pattern)

Claims

A vehicular lamp comprising a light guide body having a plurality of reflection steps formed on at least one surface, guiding light incident from a light source, reflecting the guided light in the reflection step, and emitting the guided light from the other surface. A vehicular lamp, wherein the reflecting steps are provided with reflecting steps of different sizes, and the amounts of light reflected by the reflecting steps are different.
The vehicle lamp according to claim 1, wherein the reflection steps have the same divergence angle of reflected light.
3. The vehicle according to claim 2, wherein said plurality of reflecting steps are formed by spherical recesses provided on the surface of the light guide, and the ratio (R/D) of the diameter dimension R and the depth D thereof is constant. lighting equipment.
The vehicle lamp according to any one of claims 1 to 3, wherein the light emission pattern includes a plurality of light emission patterns formed by light reflected in a plurality of reflection steps.
The plurality of light emission patterns are composed of a high brightness light emission pattern formed by relatively large sized reflection steps and a low brightness light emission pattern formed by relatively small size reflection steps. Item 5. The vehicle lamp according to item 4.
6. The vehicle lamp according to claim 5, wherein, of the plurality of light emission patterns, light emission patterns with low brightness are shadow patterns, and patterns with high brightness are stereoscopically visible.
The light guide is formed in a plate shape, the light of the light source is incident from at least one end face, and the plurality of reflection steps are formed on one plate surface intersecting with this face, opposite to this one plate face. 7. The vehicular lamp according to claim 1, wherein the light reflected by the reflecting step is emitted from the other side plate surface.
The vehicle lamp according to claim 7, wherein a part of the other plate surface of the light guide is formed as a light diffusion surface that diffuses emitted light.
A vehicular lamp comprising a light guide body having a plurality of reflection steps formed on at least one surface, guiding light incident from a light source, reflecting the guided light in the reflection step, and emitting the guided light from the other surface. A vehicle lamp, wherein a part of the other surface of the light guide is formed as a light diffusion surface for diffusing emitted light.
The light guide is formed in a plate shape, and reflection steps are formed on one plate surface and the other plate surface, respectively, and the light reflected by each reflection step is emitted from the plate surface on the opposite side. 3. The vehicular lamp according to claim 1, further comprising first and second reflecting mirrors for reflecting light emitted from the surface in the same direction.