JP6742228B2 - Lamp - Google Patents

Description

TECHNICAL FIELD The present invention relates to a lamp including a plate-shaped light guide.

BACKGROUND ART Conventionally, a lamp including a light guide that guides light incident from a light source in a required direction is known, and a light guide including a plate-shaped light guide is also known.

In "Patent Document 1", as a plate-shaped light guide in such a lamp, the light guided in the plate-shaped light guide is internally reflected by a plurality of reflecting elements formed on the rear surface of the light guide, and the light is guided from the front surface. What is configured to emit is described.

In the plate-shaped light guide described in this "Patent Document 1," the front surface and the rear surface thereof are vertical planes including the required direction (that is, the direction in which light from the light source incident on the plate-shaped light guide is guided). The reflective elements are arranged so as to extend along each of them, and each reflective element is formed to extend in a direction orthogonal to the required direction.

JP, 2013-206875, A

In the lamp described in "Patent Document 1", when the lamp with the light source turned on is observed from the front, the plate-shaped light guide appears to shine along the required direction.

However, when the front surface and the rear surface of the plate-shaped light guide are arranged so as to be inclined with respect to the vertical plane including the required direction, each reflective element is orthogonal to the required direction. When the lamp is in a state where the light source is turned on, the plate-shaped light guide looks like a streak along the direction inclined with respect to the required direction. As a result, the appearance of the lamp is impaired.

The present invention has been made in view of the above circumstances, and in a lamp including a plate-shaped light guide body that guides light incident from a light source in a required direction, the front surface and the rear surface of the plate-shaped light guide body are described above. Even when the lamp is arranged in a state of being inclined with respect to the vertical plane including the required direction, it is possible to prevent the appearance of the lamp when the light source is turned on from being observed from the front. The purpose is to provide a lamp.

The invention of the present application is intended to achieve the above object by devising the structure of the plate-shaped light guide.

That is, the lamp according to the present invention is
A lamp including a light source and a plate-shaped light guide that guides light incident from the light source in a required direction,
The plate-shaped light guide body internally reflects the light from the light source guided to the plate-shaped light guide body by a plurality of reflective elements formed on the rear surface of the plate-shaped light guide body. It is configured to emit from the front of the body,
The plurality of reflective elements are arranged in a line in the required direction so as to extend in a direction intersecting the required direction,
The plate-shaped light guide is arranged such that the front surface and the rear surface of the plate-shaped light guide are inclined with respect to a vertical plane including the required direction,
Each of the reflective elements extends in an inclined direction such that an end located on a rear side of both ends of the reflective element is closer to the light source than an end located on a front side. To do.

The type of the “light source” is not particularly limited, and for example, a light emitting diode, a laser diode, a light source bulb or the like can be adopted.

The “plate-shaped light guide” is not particularly limited in its specific cross-sectional shape as long as it is formed in a plate shape. That is, the "plate-shaped light guide" includes not only one formed in a flat plate shape but also one formed to extend along a curved surface, and one formed in a thick wall, The front surface is formed into a curved surface and the rear surface is formed into a flat surface.

The specific direction of the "required direction" is not particularly limited, and for example, a horizontal direction or a vertical direction can be adopted.

The "plurality of reflective elements" are arranged in a line in the required direction, but at that time, they may be arranged in a line in a continuous manner, or arranged in a line with an interval. It may have been done.

In the lamp according to the present invention, the plate-shaped light guide body that guides the light incident from the light source in a required direction is internally reflected by the plurality of reflection elements formed on the rear surface of the light guided in the plate-shaped light guide body. And a plurality of reflective elements are arranged in a line in the required direction so as to extend in a direction intersecting with the required direction. Are arranged such that their front and rear surfaces are inclined with respect to the vertical plane including the above-mentioned required direction, and each reflection element has its end located on the rear side located on the front side. Since it extends in the inclined direction so as to be closer to the light source than the end portion, the following operational effects can be obtained.

That is, the plate-shaped light guide is arranged such that its front and rear surfaces are inclined with respect to the vertical plane including the above-mentioned required direction, but each reflection element has an end located on the rear side of both ends thereof. Since it extends in a direction inclined so as to be closer to the light source than the end portion located on the front side, when the lamp fixture in a state where the light source is turned on is observed from the front, the plate-shaped light guide is substantially in the required direction. You can make it look like a streak along the line. This makes it possible to prevent the appearance of the lamp from being impaired.

As described above, according to the present invention, in the lamp including the plate-shaped light guide that guides the light incident from the light source in the required direction, the front surface and the rear surface of the plate-shaped light guide with respect to the vertical plane including the required direction. Even when the lamps are arranged in a tilted state, it is possible to prevent the appearance of the lamp with the light source turned on from being observed from the front.

In the above configuration, the plate-shaped light guide may include a plurality of regions having different inclination angles with respect to the vertical plane including the required direction in a cross section orthogonal to the required direction. When such a configuration is adopted, if the direction in which each reflective element extends is set to a different direction for each region, when the lamp with the light source turned on is observed from the front, The light guide body can be made to appear as a streak in each region substantially along the required direction.

In that case, it is also possible to adopt a configuration in which the plurality of regions includes two regions in which directions inclining with respect to the vertical plane including the above-described required direction are set in directions opposite to each other. Even when such a configuration is adopted, when the lamp with the light source turned on is observed from the front, the plate-shaped light guide appears to shine linearly along each of the required directions in each region. can do.

In the above configuration, as the plate-shaped light guide, the light emitted from the light source is made to enter from one end face of the plate-shaped light guide in the required direction, and the light source and one end face of the plate-shaped light guide are provided. A light control member configured to emit the light emitted from the light source as substantially parallel light toward one end surface of the plate-shaped light guide is disposed between With the configuration in which a plurality of lens elements that allow the light emitted from the light control member to be incident as light that diffuses in the width direction of the plate-shaped light guide is formed, the following operational effects can be obtained.

That is, since the light incident from the light source through the light control member can be guided in the plate-shaped light guide body as light which is distributed substantially evenly in the width direction of the plate-shaped light guide body, it is possible to The emitted light can also be light emitted from a wide range. Therefore, when the lamp with the light source turned on is observed from the front, it is possible to make the plate-shaped light guide shine like a strip instead of a streak, thereby improving the appearance of the lamp. it can.

Front view showing a lamp according to an embodiment of the present invention II-II sectional view taken on the line of FIG. Detailed sectional view taken along line III-III in FIG. (A) is a front view showing the main components of the lamp, (b) is a view similar to (a) showing a conventional example 4A is a view similar to FIG. 4A showing the operation of the above-described embodiment, and FIG. 4B is a view similar to FIG. 4B showing the operation of the conventional example. (A1) is a view similar to FIG. 4(a) showing a first modification of the above embodiment, (a2) is a sectional view taken along the line a2-a2 of (a1), and (b1) is a second modification of the above embodiment. FIG. 4A showing an example, similar to FIG. 4A, and FIG. 4B2 is a sectional view taken along line b2-b2 of FIG. 6A is a view similar to FIG. 6A1 showing the operation of the first modification, and FIG. 6B is a view similar to FIG. 6B1 showing the operation of the second modification. FIG. 4A is a view similar to FIG. 4A showing a third modification of the embodiment, and FIG. 4B is a view similar to FIG. 4A showing the operation of the third modification.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a front view showing a lamp 10 according to an embodiment of the present invention. 2 is a sectional view taken along the line II-II in FIG. 1, and FIG. 3 is a detailed sectional view taken along the line III-III in FIG.

As shown in these drawings, the lamp 10 according to the present embodiment is a vehicle lamp, and is configured as a clearance lamp provided at a left front end portion of the vehicle.

The lamp 10 has a configuration in which a light source 20 and a plate-shaped light guide 30 for guiding the light incident from the light source 20 are housed in a lamp chamber formed by a lamp body 12 and a transparent cover 14 that is transparent. Has become.

As for the lamp 10, in these drawings, the direction indicated by X is "front" (also "front" for the vehicle), and the direction indicated by Y is "left direction" ("left direction" for the vehicle). However, when viewed from the front of the lamp, it is “rightward”), and the direction indicated by Z is “upward”.

The plate-shaped light guide 30 is configured as a transparent synthetic resin molded product made of acrylic resin or the like.

The plate-shaped light guide 30 has a vertically long rectangular cross section, and is arranged so as to extend horizontally in the vehicle width direction when the lamp is viewed from the front.

At this time, the plate-shaped light guide 30 extends from the right end face 30c (that is, the end face on the inner side in the vehicle width direction) toward the left end face 30d so as to be displaced rearward. The plate-shaped light guide 30 receives light from the light source 20 incident from the left end face 30d of the plate-shaped light guide 30 in the required direction (that is, inward in the vehicle width direction) toward the right end face 30c. It is designed to guide in a direction that extends slightly diagonally toward the front).

The front surface 30a and the rear surface 30b of the plate-shaped light guide 30 are inclined rearward with respect to the vertical plane including the required direction (that is, the upper end surface 30e of the plate-shaped light guide 30 is lower than the lower end surface 30f). It is arranged in a state of being displaced to the rear side).

An extension member 16 for decoration is arranged in the lamp chamber so as to surround the plate-shaped light guide 30.

FIG. 4A is a front view of the light source 20 and the plate-shaped light guide 30 of the lamp 10 taken out and shown.

As shown in FIG. 4A, the light source 20 is a white light emitting diode, and the light emitting surface 20a thereof is directed toward the left end surface 30d of the plate-shaped light guide 30 (that is, the end surface on the outer side in the vehicle width direction). It is arranged. The light source 20 is configured so that the light emitted from the light emitting surface 20a is incident on the plate-shaped light guide 30 from the left end surface 30d. The light source 20 is supported by the lamp body 12 (or the extension member 16 or the like) while being mounted on a substrate (not shown).

On the rear surface 30b of the plate-shaped light guide 30, a plurality of reflection elements 30s for internally reflecting the light that is incident from the left end surface 30d and guided through the plate-shaped light guide 30 by total internal reflection are formed. ing.

The plurality of reflecting elements 30s are arranged over substantially the entire area of the rear surface 30b in a state where they are arranged at substantially intervals in the required direction.

Each of the reflective elements 30s is formed as a recessed groove portion having a wedge-shaped cross section and extending in a direction intersecting with the required direction. At that time, each reflective element 30s extends in a direction inclined to the right side (that is, the vehicle width direction outer side) with respect to the vertical direction from the lower end surface 30f of the plate-shaped light guide 30 toward the upper end surface 30e in the front view of the lamp. Is formed in.

At that time, the lateral inclination angle θ of each reflection element 30s with respect to the vertical direction is relative to the rearward inclination angle α (see FIG. 2) of the front surface 30a and the rear surface 30b of the plate-shaped light guide 30 with respect to the vertical plane including the required direction. Is set to a value within the range of 0.5 to 1 (for example, a value of θ=20° when α=30°).

Note that FIG. 4B is a view similar to FIG. 4A, showing a plate-shaped light guide 30 ′ as a conventional example for the plate-shaped light guide 30 of the present embodiment together with the light source 20.

As shown in FIG. 4B, the basic configuration of the plate-shaped light guide 30 ′ according to the conventional example is the same as that of the plate-shaped light guide 30.

That is, the plate-shaped light guide 30' extends horizontally in the vehicle width direction so as to be displaced rearward from the right end surface 30c' toward the left end surface 30d', and its front surface 30a' and rear surface 30b'. Are arranged in a state of being inclined rearward with respect to the vertical plane including the required direction.

Further, on the rear surface 30b' of the plate-shaped light guide body 30', a plurality of light beams for entering from the left end surface 30d' and guided in the plate-shaped light guide body 30' are internally reflected by total reflection. The reflective element 30s' is formed.

The plurality of reflecting elements 30s' are arranged over substantially the entire area of the rear surface 30b' in a state in which they are arranged at substantially intervals in the required direction, and each reflecting element 30s' has a wedge-shaped cross-sectional shape in a direction intersecting with the required direction. It is formed as a recessed groove portion extending to the.

However, in this plate-shaped light guide 30', each reflection element 30s' is formed so as to extend in the vertical direction from the lower end surface 30f' toward the upper end surface 30e' when the lamp is viewed from the front.

FIGS. 5A and 5B are diagrams similar to FIG. 4A, showing how the plate-shaped light guides 30 and 30′ illuminate when the light source 20 is turned on.

As shown in FIG. 5A, in the plate-shaped light guide 30 of the present embodiment, after the light is emitted from the light source 20 and is incident from the left end face 30d, the light guided in the plate-shaped light guide 30 is By being internally reflected by the plurality of reflecting elements 30s and emitted from the front surface 30a, the plate-shaped light guide body 30 looks like a streak.

On the other hand, as shown in FIG. 5B, also in the conventional plate-shaped light guide 30 ′, after the light is emitted from the light source 20 and is incident from the left end face 30 d ′, the light is guided through the plate-shaped light guide 30 ′. The reflected light is internally reflected by the plurality of reflection elements 30s' and emitted from the front surface 30a', so that the plate-shaped light guide 30' appears to shine like stripes.

At that time, in the conventional plate-shaped light guide 30′, the bright portion B′ that appears to shine like a streak is inclined obliquely downward from the vicinity of the left end face 30d′ toward the right end face 30c′, and the lower end face 30f′ is formed. While extending to the vicinity, it extends obliquely downward from the vicinity of the upper end surface 30e' to the vicinity of the right end surface 30c'.

In this way, the bright portions B′ that appear to shine like stripes are formed in a state in which they are inclined obliquely downward at two locations, because the front surface 30a′ and the rear surface 30b′ of the plate-shaped light guide 30′ are required as described above. This is because each reflective element 30s' is formed so as to extend in the vertical direction when viewed from the front of the lamp, while being inclined rearward with respect to the vertical plane including the direction.

Depending on the inclination angles of the front surface 30a′ and the rear surface 30b′, bright portions B′ that appear to shine like stripes are formed at one location or at three or more locations.

On the other hand, as shown in FIG. 5A, in the plate-shaped light guide 30 of the present embodiment, the bright portion B that appears to shine linearly is substantially horizontal from the vicinity of the left end face 30d to the vicinity of the right end face 30c. Extending in the direction.

As described above, the bright portion B that looks like a stripe is formed so as to extend in a substantially horizontal direction because the front surface 30a and the rear surface 30b of the plate-shaped light guide 30 are different from the vertical plane including the required direction. The reflection elements 30s are inclined rightward with respect to the vertical direction from the lower end surface 30f to the upper end surface 30e of the plate-shaped light guide 30 in a front view of the lamp so as to correspond to the inclination toward the rear side. This is due to the fact that it extends in the direction (that is, the end located on the rear side of both ends of each reflective element 30s is inclined so as to be closer to the light source 20 than the end located on the front side).

Next, the function and effect of this embodiment will be described.

In the lamp 10 according to the present embodiment, a plurality of plate-shaped light guides 30 that guide the light incident from the light source 20 in a required direction are formed on the rear surface 30b of the light that is guided through the plate-shaped light guide 30. Is configured to be internally reflected by the reflective element 30s and emitted from the front surface 30a, and the plurality of reflective elements 30s are arranged in a state of being aligned in the required direction so as to extend in a direction intersecting the required direction. However, the plate-shaped light guide 30 is arranged such that the front surface 30a and the rear surface 30b thereof are inclined with respect to the vertical plane including the required direction, and each reflection element 30s is viewed from the front of the lamp. In a direction inclined from the lower end surface 30f of the plate-shaped light guide 30 to the upper end surface 30e to the right side with respect to the vertical direction (that is, the end portion located on the rear side of both end portions of each reflective element 30s is directed forward). Since it extends in the direction inclined so as to be closer to the light source 20 than the positioned end portion, the following operational effects can be obtained.

That is, the plate-shaped light guide 30 is arranged such that the front surface 30a and the rear surface 30b of the plate-shaped light guide 30 are inclined with respect to the vertical plane including the required direction, but each reflection element 30s is a plate-shaped light guide when the lamp is viewed from the front. Since the light source 20 extends from the lower end surface 30f to the upper end surface 30e in a direction inclined to the right with respect to the vertical direction, the plate-shaped light guide body is observed when the lamp 10 with the light source 20 turned on is observed from the front. It is possible to make the line 30 shine like a streak substantially along the required direction. This makes it possible to prevent the appearance of the lamp from being impaired.

As described above, according to this embodiment, in the lamp 10 including the plate-shaped light guide 30 that guides the light incident from the light source 20 in the required direction, the front surface 30a and the rear surface 30b of the plate-shaped light guide 30 have the above-described required direction. Even when the lamp 10 is arranged in a state of being inclined with respect to the vertical plane including, it is possible to prevent the appearance of the lamp 10 in which the light source 20 is lit from being observed from the front. ..

In the above embodiment, each reflective element 30s has been described as being formed as a concave groove portion, but it may be formed as a convex stripe portion.

In the above-described embodiment, the plate-shaped light guide 30 is described as being arranged so as to extend horizontally in the vehicle width direction, but it may be arranged so as to extend in the vertical direction and the diagonal direction. Is.

In the above embodiment, the front surface 30a and the rear surface 30b of the plate-shaped light guide 30 are inclined rearward with respect to the vertical plane including the required direction, and each reflective element 30s is inclined rightward when viewed from the front of the lamp. However, on the contrary, the front surface 30a and the rear surface 30b of the plate-shaped light guide 30 are inclined forward with respect to the vertical plane including the required direction, and The element 30s may be configured to extend in a direction inclined to the left side when the lamp is viewed from the front.

Even when such a configuration is adopted, it is possible to make the plate-shaped light guide 30 shine like a streak substantially along the required direction.

In the above embodiment, the case where the lamp 10 is a clearance lamp provided at the left front end of the vehicle has been described. However, a vehicle lamp other than the clearance lamp (for example, a daytime running lamp, a tail lamp, a stop lamp, a turn signal). Lamp, room lamp, etc.), and further may be a lamp other than the vehicle lamp.

Next, a modified example of the above embodiment will be described.

First, a first modified example of the above embodiment will be described.

FIG. 6(a1) is a view similar to FIG. 4(a) showing the main components of the vehicular lamp according to the present modification. Further, FIG. 6(a2) is a sectional view taken along the line a2-a2 of FIG. 6(a1).

As shown in these drawings, the basic configuration of this modification is the same as that of the above-described embodiment, but the configuration of the plate-shaped light guide 130 and the number of light sources 20 are different from those of the above-described embodiment. There is.

That is, the plate-shaped light guide 130 of the present modification extends in the same required direction as the plate-shaped light guide 30 of the above embodiment, and the front surface 130a and the rear surface 130b are inclined rearward. This is different from the above-described embodiment in that an upper region 130A and a lower region 130B having different inclination angles are provided.

At that time, the rearward inclination angle α1 of the lower region 130B is set to the same value as the rearward inclination angle α of the plate-shaped light guide 30 of the above embodiment, and the rearward inclination angle α2 of the upper region 130A is set to the rearward inclination angle α2. It is set to a value larger than α1.

Further, also in the plate-shaped light guide 130 of the present modification, a plurality of reflective elements 130s are arranged on the rear surface 130b over substantially the entire area of the rear surface 130b in a state of being arranged at substantially intervals in the required direction, and Each reflective element 130s is inclined to the right with respect to the vertical direction when the lamp is viewed from the front. At that time, the lateral inclination angle θ1 of the portion located in the lower region 130B is set to the same value as the lateral inclination angle θ of each reflective element 30s of the above-described embodiment, and the side of the portion located in the upper region 130A is set. The lateral tilt angle θ2 is set to a value larger than the lateral tilt angle θ1.

In this modification, the two light sources 20 are arranged with their light emitting surfaces 20a directed toward the upper region 130A and the lower region 130B of the left end face 130d of the plate-shaped light guide 30.

FIG. 7A is a view similar to FIG. 6A1 showing how the plate-shaped light guide 130 emits light when the light source 20 is turned on.

As shown in FIG. 7A, in the plate-shaped light guide 130, after the light is emitted from each light source 20 and is incident from the left end face 130d, the upper region 130A and the lower region 130B in the plate-shaped light guide 130 are provided. The light guided inside is internally reflected by the plurality of reflective elements 130s and emitted from the front surface 130a, so that the plate-shaped light guide 130 appears to shine in stripes in each of the upper region 130A and the lower region 130B.

At that time, the bright portion B1 that appears to shine like stripes in the lower region 130B extends in a substantially horizontal direction from the vicinity of the left end face 130d to the vicinity of the right end face 130c, and it appears to shine like stripes in the upper region 130A. The bright portion B2 extends substantially horizontally from the vicinity of the left end face 130d to the vicinity of the right end face 130c.

In this manner, the bright portions B1 and B2 that appear to shine like stripes are formed so as to extend in a substantially horizontal direction because the reflective elements 130s are located in the lower region 130B on the side corresponding to the rearward inclination angle α1. This is because it extends at a lateral tilt angle θ1 and extends at a lateral tilt angle θ2 corresponding to the rearward tilt angle α2 in the upper region 130A.

By adopting the configuration of the present modification, when the lamp with the light source 20 turned on is observed from the front, the rearward inclination angle is different between the upper region 130A and the lower region 130B of the plate-shaped light guide 130. Despite this, each of the upper region 130A and the lower region 130B can be made to appear as a streak shining substantially along the required direction.

Next, a second modification of the above embodiment will be described.

FIG. 6(b1) is a view similar to FIG. 4(a) showing the main constituent elements of the vehicular lamp according to the present modification. Further, FIG. 6B2 is a sectional view taken along line b2-b2 of FIG. 6B1.

As shown in these figures, the basic configuration of this modification is the same as that of the above-described embodiment, but the configuration of the plate-shaped light guide 230 and the number of light sources 20 are different from those of the above-described embodiment. There is.

That is, the plate-shaped light guide 230 of the present modification extends in the same required direction as the plate-shaped light guide 30 of the above embodiment, and the front surface 230a and the rear surface 230b are inclined rearward. This is different from the case of the above-described embodiment in that an upper region 230A and a lower region 230B having opposite inclination angles are provided.

At that time, the rearward inclination angle α3 of the upper region 230A is set to the same value as the rearward inclination angle α of the plate-shaped light guide 30 of the above embodiment. On the other hand, the lower region 230B has a shape that is vertically symmetrical with the upper region 230A, and therefore the rearward inclination angle α4 is set to the same value as the rearward inclination angle α3.

Also in the plate-shaped light guide 230 of the present modification, a plurality of reflective elements 230s are arranged on the rear surface 230b over the substantially entire area of the rear surface 230b in a state of being arranged at substantially intervals in the required direction. In each of the reflective elements 130s, when viewed from the front of the lamp, the portion located in the upper region 230A is inclined to the right with respect to the vertical direction, and the portion located in the lower region 130B is inclined to the left with respect to the vertical direction.

At that time, the lateral tilt angle θ3 of the portion located in the upper region 230A is set to the same value as the lateral tilt angle θ of each reflective element 30s of the above-described embodiment, and the side of the portion located in the lower region 130B is located. The lateral tilt angle θ4 is set to the same value as the lateral tilt angle θ3.

In this modification, the two light sources 20 are arranged with their light emitting surfaces 20a directed toward the upper region 230A and the lower region 230B of the left end face 30d of the plate-shaped light guide 30.

FIG. 7B is a view similar to FIG. 6B1 showing how the plate-shaped light guide 230 shines when the light source 20 is turned on.

As shown in FIG. 7B, in the plate-shaped light guide 230, after the light is emitted from each light source 20 and is incident from the left end face 230d, the upper region 230A and the lower region 230B in the plate-shaped light guide 230 are provided. The light guided inside is internally reflected by the plurality of reflection elements 230s and emitted from the front surface 230a, so that the plate-shaped light guide 230 appears to be streaky in each of the upper region 230A and the lower region 230B.

At that time, the bright portion B3 that looks like a streak in the upper region 230A extends in a substantially horizontal direction from near the left end face 230d to near the right end face 230c, and looks like a streak in the lower region 230B. The bright portion B4 extends substantially horizontally from the vicinity of the left end face 230d to the vicinity of the right end face 230c.

In this way, the bright portions B3 and B4 that appear to shine like stripes are formed so as to extend in a substantially horizontal direction because the reflective elements 230s are located in the upper region 230A on the side corresponding to the rearward inclination angle α3. This is because it extends at the lateral tilt angle θ3 and at the lower region 230B at the lateral tilt angle θ4 corresponding to the rearward tilt angle α4.

By adopting the configuration of this modified example, when the lamp with the light source 20 turned on is observed from the front, the rearward inclination angles of the upper region 230A and the lower region 130B of the plate-shaped light guide 230 are turned upside down. However, each of the upper region 230A and the lower region 230B can be made to shine in a streak pattern substantially along the required direction.

Next, a third modified example of the above embodiment will be described.

FIG. 8A is a view similar to FIG. 4A, showing the main components of the vehicular lamp according to the present modification.

As shown in FIG. 8A, the basic configuration of this modification is the same as that of the above embodiment, but the shape of the left end face 330d of the plate-shaped light guide 330 is different from that of the above embodiment. Further, between the left end face 330d (that is, one end face in the above-described required direction) and the light source 20, the light emitted from the light source 20 is directed to the left end face 330d of the plate-shaped light guide 330 as substantially parallel light. This is different from the above embodiment in that a light control member 340 configured to emit light is arranged.

The light control member 340 is configured as a transparent synthetic resin molded product made of acrylic resin or the like.

The light control member 340 is configured as a plate-shaped member arranged on the same plane as the plate-shaped light guide 30.

The light control member 340 is configured to cause the light emitted from the light source 20 to enter from the first surface 340a and then to emit the light from the second surface 340b.

The first surface 340a of the light control member 340 includes a central region 340a1 on which light from the light emission center of the light source 20 is incident as parallel light, and a direction in which light from the light emission center of the light source 20 is separated on both sides of the central region 340a1. And a peripheral region 340a2 that internally reflects the light as parallel light traveling toward the first surface 340a by total internal reflection.

On the other hand, the second surface 340b of the light control member 340 is formed by a plane that is arranged at a substantially equal interval with the left end surface 330d of the plate-shaped light guide 330, and is incident from the central region 340a1 of the first surface 340a. The substantially parallel light and the substantially parallel light reflected by the peripheral region 340a2 are incident on the left end face 330d of the plate-shaped light guide 330 as substantially parallel light.

On the left end surface 330d of the plate-shaped light guide 330, a plurality of lens elements 330g are formed side by side in the width direction. Each lens element 330g is formed in the shape of a convex cylindrical lens extending in the plate thickness direction of the plate-shaped light guide 330. Then, by the plurality of lens elements 330g, the light emitted from the light control member 340 is made incident on the plate-shaped light guide 330 as light that is diffused in the width direction of the plate-shaped light guide 330.

As a result, in the plate-shaped light guide 330, substantially parallel light emitted from the light control member 340 and reaching the entire area of the left end face 330d is incident as light diffused in the width direction by the plurality of lens elements 330g. The inside of the plate-shaped light guide 330 is guided toward the right end face 230c.

FIG. 8B is a view similar to FIG. 8A, showing how the plate-shaped light guide 330 shines when the light source 20 is turned on.

As shown in FIG. 8B, in the plate-shaped light guide 330, the light emitted from the light source 20 via the light control member 340 enters the plate-shaped light guide 330 after entering from the left end face 330 d. The guided light is internally reflected by the plurality of reflective elements 330s formed on the rear surface 330b and emitted from the front surface 330a, so that the plate-shaped light guide 330 shines in a strip shape as a uniform bright portion B5 over substantially the entire width. appear.

This is because the light emitted from the light control member 340 reaches the entire area of the left end face 230d of the plate-shaped light guide 330 as parallel light and is diffused in the width direction by the plurality of lens elements 330g formed on the left end face 230d. This is because the light is guided through the plate-shaped light guide 330.

By adopting the configuration of this modification, the light incident from the light source 20 via the light control member 340 is distributed in the widthwise direction of the plate-shaped light guide 330 as substantially evenly distributed light inside the plate-shaped light guide 330. The light emitted from the front surface 330a can be emitted from a wide range. Therefore, when the lamp with the light source 20 turned on is observed from the front, it is possible to make the plate-shaped light guide 330 shine like a strip rather than a streak, thereby improving the appearance of the lamp. be able to.

In the third modification, each lens element 330g has been described as being formed in the shape of a convex cylindrical lens, but it may be formed in the shape of a concave cylindrical lens or the like.

It is needless to say that the numerical values shown as the specifications in the above-described embodiment and its modifications are merely examples, and these may be appropriately set to different values.

Further, the invention of the present application is not limited to the configurations described in the above-described embodiment and its modified examples, and configurations with various modifications other than this can be adopted.

10 Lamps 12 Lamp body 14 Light-transmitting cover 16 Extension member 20 Light source 20a Light emitting surface 30, 130, 230, 330 Plate-shaped light guide 30a, 130a, 230a, 330a Front surface 30b, 130b, 230b, 330b Rear surface 30c, 130c, 230c , 330c Right end surface 30d, 130d, 230d, 330d Left end surface 30e Upper end surface 30f Lower end surface 30s, 130s, 230s, 330s Reflecting element 130A, 230A Upper area 130B, 230B Lower area 330g Lens element 340 Light control member 340a First surface 340a1 Central area 340a2 Peripheral area 340b Second surface B, B1, B2, B3, B4, B5 Bright part α, α1, α2, α3, α4 Backward tilt angle θ, θ1, θ2, θ3, θ4 Side tilt angle

Claims (4)

A lamp including a light source and a plate-shaped light guide that guides light incident from the light source in a required direction,
The plate-shaped light guide body internally reflects the light guided in the plate-shaped light guide body by a plurality of reflecting elements formed on the rear surface of the plate-shaped light guide body, and emits the light from the front surface of the plate-shaped light guide body. Is configured to
The plurality of reflective elements are arranged in a line in the required direction so as to extend in a direction intersecting the required direction,
The plate-shaped light guide is arranged such that the front surface and the rear surface of the plate-shaped light guide are inclined with respect to a vertical plane including the required direction,
Each of the reflective elements extends in an inclined direction such that an end located on a rear side of both ends of the reflective element is closer to the light source than an end located on a front side. A lamp that does. The plate-shaped light guide includes a plurality of regions having different inclination angles in a cross section orthogonal to the required direction,
The lamp according to claim 1, wherein a direction in which each of the reflective elements extends is set to be different for each of the regions. The lighting device according to claim 2, wherein the plurality of regions include two regions inclined in directions opposite to each other with respect to a vertical plane including the required direction. The plate-shaped light guide is configured to allow the light emitted from the light source to enter from one end face of the plate-shaped light guide in the required direction.
A light control member configured to emit light emitted from the light source as substantially parallel light between the light source and the one end surface of the plate-shaped light guide toward the one end surface of the plate-shaped light guide. Has been placed,
A plurality of lens elements are formed on one end surface of the plate-shaped light guide, the light being emitted from the light control member to be incident as light diffused in the width direction of the plate-shaped light guide. The lamp according to any one of claims 1 to 3.

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