JP2016061973A - Light reflection plate and light reflection method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a light reflection plate when mounted on a tail lamp of a vehicle such that an inter-vehicle distance to a preceding vehicle is easily grasped by a crew member of a subsequent vehicle.SOLUTION: A light reflection plate 10 includes: an irregular reflection portion 20 and a mirror reflection portion 30 in an area where a light beam flux is projected. The irregular reflection portion 20 has an irregular reflection surface 21 that irregularly reflects the light beam flux. The mirror reflection portion 30 has a mirror reflection surface 31 of which a reflection surface faces upward to reflect the light beam flux upward.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a light reflecting plate and a light reflecting method.

  An example of a light reflection plate and a light reflection method is described in Patent Document 1. The display device (light reflecting plate and light reflecting method) described in Patent Document 1 includes a flat surface and an inclined surface, and operates as follows.

  Light hitting the flat surface of the display device described in Patent Document 1 is reflected and travels toward the scattering plate. Further, the light hitting the inclined surface is scattered and reflected toward the scattering plate. Thereby, the display apparatus of patent document 1 can reflect the light irradiated from LED toward a scattering plate efficiently. The LED is an abbreviation for “Light Emitting Diode”.

JP 2002-175031 A

  By the way, when the display device described in Patent Document 1 is mounted on a tail lamp of a vehicle (hereinafter referred to as a forward vehicle), for example, There is a problem that it is difficult to grasp the distance between vehicles. The reason is that the display device described in Patent Document 1 always reflects with uniform brightness.

  For this reason, the display device described in Patent Document 1 does not change the brightness even when the succeeding vehicle approaches the preceding vehicle, so that the occupant of the following vehicle is clogged with the distance between the preceding vehicle and the front vehicle. There is a problem that it is difficult to grasp.

  An object of the present invention is to provide a light reflecting plate and a light reflecting method capable of making it easier for an occupant of a succeeding vehicle to grasp the distance between the vehicle and the vehicle ahead when mounted on the tail lamp of the vehicle, which is the above-described problem. There is to do.

  In order to achieve the above object, a light reflecting plate according to the present invention includes a diffuse reflection part and a mirror reflection part in a region irradiated with a light beam, and the diffuse reflection part has a diffuse reflection surface for irregularly reflecting the light beam. The mirror reflecting section is configured to have a mirror reflecting surface that reflects the reflecting surface upward and reflects the light flux upward.

  In order to achieve the above object, the light reflection method according to the present invention reflects a mirror with a reflecting surface facing upward and reflecting the light bundle upward when the light bundle is irregularly reflected and mirror-reflected. ing.

  ADVANTAGE OF THE INVENTION According to this invention, when it mounts in the tail lamp of a vehicle, it can make it easy for the passenger | crew of a subsequent vehicle to grasp | ascertain the distance between vehicles with a preceding vehicle.

It is the schematic which shows the outline of the light reflection board which concerns on one Embodiment (1st Embodiment) of this invention. It is a side view which shows the state which looked at this vehicle from the side regarding the structure of the vehicle carrying the light reflection board which concerns on other embodiment (2nd Embodiment) of this invention. It is a front view of the light reflection board which concerns on other embodiment (2nd Embodiment) of this invention. FIG. 4 is a cross-sectional view taken along line II ′ in FIG. It is an expanded sectional view which expands and shows the A section in FIG. It is an expanded sectional view which expands and shows the A section in FIG. 4, and is an expanded sectional view which shows an example of an effect | action of a light reflecting plate. It is an expanded sectional view which expands and shows the A section in FIG. 4, and is an expanded sectional view which shows the other example of an effect | action of a light reflecting plate. It is a use condition figure which shows the 1st example of the use condition of the light reflection board which concerns on other embodiment (2nd Embodiment) of this invention. It is a use condition figure which shows the 2nd example of the use condition of the light reflection board which concerns on other embodiment (2nd Embodiment) of this invention. It is a use condition figure which shows the 3rd example of the use condition of the light reflection board which concerns on other embodiment (2nd Embodiment) of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(First embodiment)
One embodiment (first embodiment) of the present invention will be described with reference to FIG. FIG. 1 is a schematic view showing an outline of a light reflecting plate 10 according to the present embodiment (first embodiment).

  As illustrated in FIG. 1, the light reflecting plate 10 of the present embodiment includes an irregular reflection unit 20 and a mirror reflection unit 30 in a region irradiated with a light bundle. The irregular reflection unit 20 has an irregular reflection surface 21 that irregularly reflects the light beam. The mirror reflection unit 30 has a mirror reflection surface 31 that reflects the reflection surface upward and reflects the light beam upward.

  Here, the operation and action of the irregular reflection unit 20 and the mirror reflection unit 30 will be described on the assumption that the light reflection plate 10 of the present embodiment is mounted on a vehicle. At this time, it is assumed that the vehicle on which the light reflecting plate 10 is mounted is a front vehicle, and that a light beam is irradiated from a vehicle following the front vehicle.

  When the light flux is irradiated on the irregular reflection surface 21 from the following vehicle, an occupant of the subsequent vehicle can check the reflected light from the irregular reflection surface 21. Further, when a light beam is irradiated from the following vehicle to the mirror reflection surface 31, it is possible to check the reflected light of the mirror reflection surface 31 in the reflection region of the mirror reflection surface 31.

  That is, when the light flux is irradiated from the following vehicle to the irregular reflection unit 20, the passenger of the following vehicle can always check the reflected light of the irregular reflection surface. On the other hand, even when the beam bundle is irradiated from the following vehicle to the mirror reflecting portion 30, it is difficult for the occupant of the following vehicle to check the reflected light on the mirror reflecting surface if the following vehicle is not in the reflection area. is there.

  As described above, the reflection area of the mirror reflection unit 30 can be said to be an area (position) in which the following vehicle is closer than the predetermined distance to the preceding vehicle because the mirror reflection surface 31 faces upward.

  Thereby, in this embodiment, the light reflected by the mirror reflector 30 can hardly be confirmed from a location away from the light reflecting plate 10, but when the light reflecting plate 10 is approached, this light reflection is performed. It becomes possible to confirm strong reflected light from the plate 10.

  For this reason, in this embodiment, for example, when the light irradiation plate 10 is mounted on the tail lamp of the vehicle, when a subsequent vehicle approaches the vehicle on which the light reflection plate 10 is mounted, the occupant of the subsequent vehicle It becomes possible to confirm strong reflected light from the plate 10.

  Therefore, according to the present embodiment, when mounted on the tail lamp of the vehicle, it is possible to make it easier for the occupant of the following vehicle to grasp the inter-vehicle distance from the preceding vehicle.

(Second Embodiment)
Another embodiment (second embodiment) of the present invention will be described with reference to FIGS. First, the configuration of the light reflecting plate 100 according to the present embodiment will be described with reference to FIGS. FIG. 2 is a side view of the configuration of the vehicle 200 equipped with the light reflecting plate 100 according to the present embodiment (second embodiment) as viewed from the side.

  FIG. 3 is a front view of the light reflecting plate 100 according to the present embodiment (second embodiment). 4 is a cross-sectional view taken along line II ′ in FIG. FIG. 5 is an enlarged cross-sectional view showing an A portion in FIG.

  As illustrated in FIGS. 2 to 5, the light reflecting plate 100 of this embodiment includes a base portion 110 and a reflecting portion 120. Since the base part 110 is a well-known technique, the description thereof is omitted.

  The reflection part 120 has a reflection base 121 and a reflection part protective material 122. The reflection base 121 has an irregular reflection part 131 subjected to irregular reflection processing and a mirror reflection part 132 subjected to high reflection processing. The irregular reflection part 131 and the mirror reflection part 132 will be described later.

  The reflection portion protection member 122 of the reflection portion 120 is formed of acrylic or the like having a high light transmittance. And the reflection part protection material 122 is formed by coloring acrylic, for example, red.

  In this embodiment, the irregular reflection part 131 of the reflection base 121 is made of resin. The irregular reflection surface of the irregular reflection part 131 is processed by attaching a reflective material to fine irregularities.

  Similar to the irregular reflection part 131, the mirror reflection part 132 of the reflection base 121 is made of resin. The mirror reflecting surface of the mirror reflecting portion 132 is processed by attaching a highly reflective reflecting material such as silver. Further, the mirror reflecting surface reflects the reflecting surface facing upward and the beam bundle facing upward.

  Here, the operation and action of the irregular reflection part 131 and the mirror reflection part 132 will be described on the assumption that the light reflection plate 100 of this embodiment is mounted on a vehicle. At this time, it is assumed that the vehicle on which the light reflecting plate 100 is mounted is a front vehicle, and that a light beam is irradiated from a vehicle following the front vehicle.

  When the light flux is irradiated from the following vehicle to the irregular reflection surface, the passenger of the subsequent vehicle can check the reflected light from the irregular reflection surface. Further, when a light beam is irradiated from the following vehicle to the mirror reflection surface, it is possible to confirm the reflected light of the mirror reflection surface in the reflection region of the mirror reflection surface.

  That is, when the light flux is irradiated from the following vehicle to the irregular reflection unit 131, the passenger of the subsequent vehicle can always check the reflected light of the irregular reflection surface. On the other hand, even when the light beam is irradiated from the following vehicle to the mirror reflecting portion 132, it is difficult for the passenger of the following vehicle to check the reflected light from the mirror reflecting surface if the following vehicle is not in the reflection region. It is.

  As described above, the reflection area of the mirror reflection section 132 can be said to be an area (position) in which the following vehicle is closer to the preceding vehicle than a predetermined distance because the mirror reflection surface faces upward.

  Thereby, in this embodiment, regarding the light reflected from the light reflecting plate 100, when only the light reflected from the irregular reflection part 131 is confirmed, the light reflected from the irregular reflection part 131 is reflected from the mirror reflection part 132. There is a case to check the light.

  In such a case, when confirming the light reflected from the irregular reflection part 131 and the light reflected from the mirror reflection part 132 together with the light reflected from the irregular reflection part 131, the stronger light is emitted than when confirming only the light reflected from the irregular reflection part 131. It becomes possible to confirm.

  For this reason, in the present embodiment, for example, when the vehicle is mounted on the tail lamp of the vehicle, the occupant of the subsequent vehicle is reflected from the irregular reflection unit 131 when the subsequent vehicle maintains a certain inter-vehicle distance. Only light is confirmed.

  On the other hand, when the inter-vehicle distance is reduced, the occupant of the following vehicle confirms the light reflected from the irregular reflection part 131 and the light reflected from the mirror reflection part 132.

  In other words, in the present embodiment, it can be said that it is possible to confirm a strong light when the distance between the vehicles is reduced than when the following vehicle maintains a certain distance between the vehicles. Therefore, according to the present embodiment, when mounted on the tail lamp of the vehicle, it is possible to make it easier for the occupant of the following vehicle to grasp the inter-vehicle distance from the preceding vehicle.

  In the present embodiment, the mirror reflecting surface is arranged at a predetermined angle toward the upper side. Here, the predetermined angle refers to an angle that is set so that the occupant of the succeeding vehicle notices the reflected light when the succeeding vehicle closes the inter-vehicle distance from the preceding vehicle. In this way, when the following vehicle is set to a predetermined angle and the distance between the following vehicle and the preceding vehicle is reduced, the reflected light is noticed by the occupant of the following vehicle, and the illusion that the preceding vehicle has been braked is detected. It becomes possible to prompt the vehicle occupant to decelerate.

  In the present embodiment, the reflecting surface of the mirror reflecting portion 132 is formed in a convex shape. As described above, the reflecting surface of the mirror reflecting portion 132 is formed in a convex shape, so that the light beam can be diffusely reflected. As a result, it is possible to make it easier for the occupant of the following vehicle to notice that the inter-vehicle distance from the preceding vehicle is narrowed.

  Further, the irregular reflection part 131 and the mirror reflection part 132 are alternately arranged. Specifically, the irregular reflection parts 131 and the mirror reflection parts 132 are alternately arranged one by one. For this reason, it can be said that the irregular reflection part 131 can diffusely reflect in the entire range of the reflection base 121. In addition, it can be said that the mirror reflecting portion 131 can be reflected in a predetermined direction within the entire range of the reflecting base 121. That is, according to the present embodiment, it can be said that irregular reflection and reflection in a predetermined direction are possible in the entire range of the reflection base 121. As a result, when a certain inter-vehicle distance is maintained, light can be reflected without being biased in any case where the inter-vehicle distance is reduced. In this embodiment, as described above, the irregular reflection parts 131 and the mirror reflection parts 132 are alternately arranged one by one. However, the present invention is not limited to this. For example, the irregular reflection parts 131 and the mirror reflection parts 132 are alternately arranged two by two. Also good.

  In this embodiment, the irregular reflection units 131 and the mirror reflection units 132 are alternately arranged. However, the present invention is not limited to this. The irregular reflection units 131 are arranged at positions corresponding to a predetermined pattern, and the mirror reflection units 132 are arranged. It may be arranged at a position other than the position corresponding to the predetermined pattern, and the predetermined pattern may be raised. Further, the mirror reflection unit 132 may be arranged only at a position corresponding to a predetermined pattern so that the predetermined pattern is raised. At this time, other than the position corresponding to the predetermined pattern, the mirror reflecting portion 132 may be disposed, or nothing may be disposed.

(About operation and action)
Next, operation | movement and an effect | action of the light reflection plate 100 of this embodiment are demonstrated using FIG.6 and FIG.7. FIG. 6 is an enlarged cross-sectional view showing an A portion in FIG. 4 in an enlarged manner, and is an enlarged cross-sectional view showing an example of the action of the light reflecting plate. FIG. 7 is an enlarged cross-sectional view showing a portion A in FIG. 4 in an enlarged manner, and is an enlarged cross-sectional view showing another example of the action of the light reflecting plate.

  FIG. 6 shows the reflection direction of the reflected light at the mirror reflecting portion 132. As illustrated in FIG. 6, the mirror reflector 132 reflects upward in a predetermined direction. FIG. 7 shows the reflection direction of the reflected light in the irregular reflection unit 131. As illustrated in FIG. 7, the irregular reflection unit 131 irregularly reflects.

  As described above, in the present embodiment, regarding the light reflected from the light reflection plate 100, the light reflected by the irregular reflection unit 131 can be confirmed from any position. On the other hand, the light reflected by the mirror reflection unit 132 can be confirmed only from a predetermined position.

  Therefore, in the present embodiment, regarding the light reflected from the light reflecting plate 100, when only the light reflected from the irregular reflection part 131 is confirmed, the light reflected from the irregular reflection part 131 is reflected from the mirror reflection part 132. There are cases where light is confirmed.

  In such a case, when confirming the light reflected from the irregular reflection part 131 and the light reflected from the mirror reflection part 132 together with the light reflected from the irregular reflection part 131, the stronger light is emitted than when confirming only the light reflected from the irregular reflection part 131. It becomes possible to confirm.

  In the present embodiment, for example, when mounted on a tail lamp of a vehicle, when the following vehicle maintains a certain inter-vehicle distance, only the light reflected from the irregular reflection unit 131 is confirmed. Further, in the present embodiment, when the succeeding vehicle reduces the inter-vehicle distance, the light reflected from the mirror reflection unit 132 is confirmed together with the light reflected from the irregular reflection unit 131.

  Therefore, according to the present embodiment, when the following vehicle closes the inter-vehicle distance, it is possible to confirm strong light, and thus it is possible to grasp the inter-vehicle distance.

(About usage)
Next, the use state of the light reflecting plate 100 of this embodiment will be described with reference to FIGS. FIG. 8 is a usage state diagram illustrating a first example of the usage state of the light reflecting plate 100 according to the present embodiment (second embodiment). FIG. 9 is a usage state diagram illustrating a second example of the usage state of the light reflecting plate 100 according to the present embodiment (second embodiment). FIG. 10 is a usage state diagram illustrating a third example of the usage state of the light reflecting plate 100 according to the present embodiment (second embodiment).

  As illustrated in FIG. 8, it is assumed that the following vehicle 300 is traveling at a certain inter-vehicle distance on the front vehicle 200 on which the light reflecting plate 100 of the present embodiment is mounted. In this case, the light emitted from the headlight of the following vehicle 300 is diffusely reflected by the irregular reflection unit 131 and reflected by the mirror reflection unit 132 in a predetermined direction.

  At this time, in this embodiment, the light reflected by the mirror reflector 132 in a predetermined direction is irradiated to a position that cannot be confirmed by the occupant's eyes when the following vehicle 300 maintains a certain inter-vehicle distance. It has become.

  As illustrated in FIG. 9, it is assumed that the following vehicle 300 is traveling on the front vehicle 200 on which the light reflecting plate 100 of the present embodiment is mounted. At this time, in the present embodiment, the light reflected by the mirror reflector 132 in a predetermined direction is irradiated to a position that can be confirmed with the eyes of the occupant.

  For this reason, in the present embodiment, when the inter-vehicle distance is reduced, strong red light is confirmed from the light reflecting plate 100. For example, an illusion that the front vehicle 200 is braked is given to the occupant of the following vehicle 300. Deceleration can be promoted.

  In the present embodiment, as described above, the light reflection plate 100 includes the irregular reflection portion 131 and the mirror reflection portion 132, and prompts the passenger of the following vehicle 300 to decelerate without using an expensive device such as a radar. Therefore, the rear-end collision can be prevented at a low cost.

  In the present embodiment, the vehicle is mounted on the tail lamp of the forward vehicle 200, but the present invention is not limited to this. For example, the present invention can be applied to signs, signboards, and the like. Therefore, in this embodiment, by applying to a sign, a signboard, and the like, when the sign, the signboard, etc. are approached, the sign, the signboard, etc. shine strongly, so that the passenger can easily notice the sign, the signboard, etc.

  As illustrated in FIG. 10, in this embodiment, when a specific pattern is formed using the irregular reflection part 131 and the mirror reflection part 132, when the light reflection plate 100 is approached, specific characters, pictures, etc. Can be raised. Specifically, a plurality of mirror reflecting portions 132 are arranged to form a triangular mark. Then, a plurality of irregular reflection portions 131 are arranged on the outer periphery of the plurality of mirror reflection portions 132 on which triangular marks are formed. As a result, it is possible to display a triangular mark on the mirror reflection unit 132. Thereby, in this embodiment, it becomes possible to display a different display mode by the case where it is far from the light reflection board 100, and the case where it approaches.

10 light reflector 11 irregular reflection part 12 mirror reflection part

Claims (7)

Provided with an irregular reflection part and a mirror reflection part in the region irradiated with the light beam,
The irregular reflection portion has an irregular reflection surface that irregularly reflects the light beam,
The mirror reflecting portion is a light reflecting plate having a mirror reflecting surface that reflects the reflecting surface upward and reflects the light flux upward. The mirror reflecting surface is
The light reflecting plate according to claim 1, wherein the light reflecting plate is disposed at a predetermined angle toward the upper side. The mirror reflecting surface is
The light reflecting plate according to claim 1, wherein the light reflecting plate is formed in a convex shape.   The light reflection plate according to claim 1, wherein the irregular reflection portion and the mirror reflection portion are alternately arranged.   4. The light according to claim 1, wherein the irregular reflection unit is disposed at a position corresponding to a predetermined pattern, and the mirror reflection unit is disposed at a position other than the position corresponding to the predetermined pattern. reflector.   4. The light reflecting plate according to claim 1, wherein the mirror reflecting portion is disposed only at a position corresponding to a predetermined pattern. 5.   A light reflection method in which when a light beam is irregularly reflected and mirror-reflected, a reflection surface to be mirror-reflected is directed upward and the light beam is reflected upward.

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