JP2011025738A - Vehicular lighting system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicular lighting system which can obtain the depth feel and produce the lighting of the mysterious illumination. <P>SOLUTION: The vehicular lighting system 10 generates the reflected light α1 in which a part of an incident light incident from an incidence part 22 of a light guide body 17 is reflected from a first surface 30 by a stippling 32 as a reflecting means toward a reflector 18 as a reflecting surface, and the reflected light α2 (the primary outgoing light) reflected toward the indoor side. The primary outgoing light α2 lights the stippling 32 on the surface of the light guide body 17 while the secondary outgoing light α3 re-reflecting the reflected light α1 toward the light guide body 17 by a curved reflecting surface 28 is seen bright to the distal side of the distance L2 by the reciprocating distance to the reflector 18 where the stippling 32 is arranged on the back side of the light guide body 17. Thus, a mysterious depth feel such as a starry sky with innumerable stars twinkling can be obtained thereby. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an illuminating device such as a car interior light, and more particularly to a vehicular illuminating device applied to an indoor illumination with a built-in overhead console installed on a vehicle ceiling.

  As an example of a conventional vehicle lighting device, two linear first light guides on which light from a small light source such as an LED is incident from one end surface, and light emitted from the other end surface of the first light guide There is a vehicular illumination device that includes a planar second light guide to which light is incident and emits uniform illumination light from the first light guide and the second light guide (for example, Patent Document 1). reference).

JP 2008-68787 A

  However, in the vehicle lighting device disclosed in the above-mentioned Patent Document 1, since the light is reflected only by the dot-cut process which is a minute concave portion applied to the second light guide, the way of light of the dot group is flat. It was. Therefore, it was difficult to produce a mysterious way of lighting because it was not possible to give a sense of depth to the way of illumination.

  An object of the present invention is to solve the above-described problems, and provides a vehicle lighting device that can provide a sense of depth and can produce a mysterious illumination. .

  The above object according to the present invention includes a light source, a first surface on the vehicle body side that is disposed adjacent to the light source, and a second surface on the indoor side facing the first surface. A plate-like light guide that guides light from the light source incident from the end face, and reflected light that is disposed on the first face side of the light guide and that travels from the second face toward the first face. A light-reflecting surface that further reflects the light, wherein the light guide reflects the incident light incident from the one end surface toward the first surface toward the first surface. And the reflecting surface further reflects the reflected light reflected by the reflecting means toward the first surface and emits the reflected light from the second surface to the indoor side. Is achieved.

  According to the vehicular illumination device having the above-described configuration, the light of the light source incident from the one end surface of the light guide is reflected from the second surface to the first surface by the light reflecting member reflecting means and is directed to the reflection surface. Then, it is further reflected by the reflecting surface and emitted from the second surface to the indoor side. Thereby, compared with the conventional thing which radiate | emits the reflected light in a light guide simply, a feeling of depth can fully be acquired and mysterious illumination method can be produced.

  Moreover, in the vehicle lighting device having the above-described configuration, it is desirable that the reflecting means is a plurality of line engravings or dot engravings.

  According to the vehicular illumination device having such a configuration, the illumination effect can be enhanced by the fact that the reflecting means of the light guide is a plurality of line engravings or dot engravings.

  In the vehicle lighting device having the above-described configuration, it is preferable that the reflecting surface is a reflector having a plurality of continuous curved reflecting surfaces.

  According to the illumination device for a vehicle having such a configuration, it is possible to obtain a feeling of depth as well as a feeling of glitter by a plurality of continuous curved reflecting surfaces of the reflecting surface. The curved surface referred to here includes not only a concave surface but also a convex surface.

  In the vehicle lighting device having the above-described configuration, it is preferable that the reflector is a cylindrical step.

  According to the vehicular illumination device having such a configuration, since the reflector is a cylindrical step, the light from the light guide is diffused and reflected and then incident on the light guide to irradiate a wide range. it can. Further, by moving the viewpoint in the room, it is possible to obtain a more sparkling feeling.

  Moreover, in the vehicle lighting device having the above-described configuration, it is preferable that a part of the incident light incident on the light guide body is emitted from a line or dot to the indoor side.

According to the vehicular illumination device having such a configuration, the outgoing light reflected from the spot of the light guide to the indoor side (hereinafter referred to as the primary outgoing light), and reflected from the spot to the reflector side, Emission light (hereinafter referred to as secondary emission light) that is reflected by the reflector and then passes through the light guide and exits indoors is visually recognized. The primary emitted light shines a line or dot on the surface of the light guide, whereas the secondary emitted light is a reciprocating distance to the reflector where the line or dot is arranged on the back side of the light guide. Because it seems to shine in the back, you can get a mysterious depth feeling like an actual starry sky.
In addition, when viewed while moving the viewpoint in the room, the primary outgoing light reflected from the time point to the indoor side does not move on the surface of the light guide, whereas the secondary outgoing light re-reflected by the reflector is Since it moves quickly in the opposite direction to the moving direction, it is possible to obtain a further sense of depth and glitter.

  According to the vehicle lighting device of the present invention, the second surface of the light guide is provided with reflecting means for reflecting incident light incident from one end surface toward the first surface, and is disposed on the first surface side. The reflected light reflected on the first surface side by another reflected surface is further reflected and emitted from the second surface to the indoor side, so that a sense of depth can be obtained, and the light of the mysterious illumination Can be directed.

BRIEF DESCRIPTION OF THE DRAWINGS It is the external appearance perspective view seen from diagonally downward which shows 1st Embodiment of the illuminating device for vehicles which concerns on this invention. It is a disassembled perspective view of the illuminating device for vehicles of FIG. It is AA sectional view taken on the line of the vehicle illuminating device of FIG. It is a BB sectional view of the lighting device for vehicles of Drawing 1. It is CC sectional view taken on the line of the reflector applied to the illuminating device for vehicles of FIG. It is the partial schematic explaining the optical characteristic of the illuminating device for vehicles of FIG. It is the partial schematic which shows 2nd Embodiment of the illuminating device for vehicles which concerns on this invention.

  Hereinafter, a plurality of embodiments of a vehicular lighting device according to the present invention will be described with reference to the drawings.

(First embodiment)
As shown in FIGS. 1 to 6, the vehicular illumination device 10 according to the first embodiment of the present invention includes a bezel 11, a dome lamp lens 12, an outer lens 13, a lighting switch 14, a dome lamp light source 15, and an LED light source unit. 16 is an overhead room lamp attached to a roof of an automobile or the like provided with a light guide 17 and a reflector 18.

As shown in FIGS. 1 and 2, the bezel 11 is formed in a frame shape, and the dome lamp lens mounting hole 19, the lighting switch mounting hole 20, and the outer lens mounting hole 21 from the vehicle front side toward the rear side. Are sequentially formed. The bezel 11 is attached to a roof lining cloth 27 that forms an indoor ceiling disposed inside the roof outer plate 26.
The dome lamp lens 12 is disposed in the dome lamp lens mounting hole 19, and the dome lamp is used for a reading lamp (spot illumination) or the like. Further, the lighting switch 14 is disposed in the lighting switch mounting hole 20, and the outer lens 13 is disposed in the outer lens mounting hole 21.

As shown in FIGS. 2 and 3, the light guide 17 is assembled inside the outer lens 13. The light guide 17 has a flat plate shape similar to the outer shape of the outer lens 13 made of a transparent resin material. The light guide 17 has an incident portion 22 on one end face on the vehicle front side.
The reflector 18 has a flat plate shape similar to the outer shape of the light guide body 17 using a resin material having no translucency.

The LED light source unit 16 includes a plurality of LEDs 23 and an LED substrate 24 on which the LEDs 23 are mounted. The LED 23 can be appropriately selected for colors such as R, G, and B in addition to white. The LED substrate 24 is assembled on the bezel 11 so that the optical axes of the plurality of LEDs 23 are arranged in the vicinity of the incident portion 22 of the light guide 17, and is electrically connected to a lighting control circuit (not shown) through the lead wire 25. It is connected.
Further, the LED light source unit 16 can perform dimming according to the user's preference by using, for example, a PWM (Pulse Width Modulation) control circuit built in the lighting control circuit. Further, similarly to the LED light source unit 16, the lighting switch 14 is electrically connected to a lighting control circuit (not shown) through a lead wire 25.

  As shown in FIGS. 3 and 4, the bezel 11 is attached so as to be in close contact with a roof lining cloth 27 disposed inside a roof outer plate 26 of the vehicle. The dome lamp lens 12 and the lighting switch 14 are disposed above the driver seat, and the outer lens 13 is disposed above the driver seat and the rear seat. A dome lamp light source 15 independent of the LED light source unit 16 is accommodated in the dome lamp lens 12. The dome lamp light source 15 is, for example, a light bulb.

As shown in FIG. 5, the reflector 18 is a concave cylindrical step that is formed of a resin material that does not transmit light and has a curved reflecting surface 28. That is, the curved reflecting surface 28 is continuously formed with a predetermined curvature along a direction perpendicularly penetrating the paper surface in the drawing. In other words, the curved reflecting surface 28 extends in the short direction perpendicular to the longitudinal direction of the light guide 17 in the horizontal plane, and has a parallel line-shaped top portion 29 between the adjacent curved reflecting surfaces 28. is doing.
The curvature and number of the curved reflecting surface 28 can be arbitrarily set and changed. The reflector 18 can also apply a fish-eye step in addition to the cylindrical step. Further, instead of the curved reflecting surface 28, a convex reflecting surface or a flat reflecting surface may be used.

Next, the optical characteristics of the vehicular illumination device 10 will be described.
As shown in FIG. 6, the light guide 17 has a first surface 30 on the vehicle body side and a second surface 31 on the indoor side facing the first surface 30, and is incident from the incident portion 22. The light from the LED 23 is guided. The light guide body 17 has a plurality of dots 32 formed on the second surface 31 side. The dot 32 has a conical shape, but may have a weight shape, a trapezoidal shape, or a spherical shape. A plurality of line marks may be formed instead of the plurality of point marks 32. Further, the pitch of the dots 32 can be arbitrarily set and changed.
The reflector 18 has a curved reflecting surface 28 continuously provided along the longitudinal direction at a predetermined step pitch L1.

  First, when the LED 23 emits light by power supply from the lighting control circuit, the light emitted from the LED 23 is incident from the incident portion 22 of the light guide 17 and travels while being totally reflected inside the light guide 17. Then, at least a part of the incident light is reflected by the stippling 32 from the first surface 30 toward the reflector 18 and the outgoing light α2 (primary outgoing light) emitted toward the indoor side. , Α2 <α1).

  The strong reflected light α1 reflected from the first surface 30 toward the reflector 18 is reflected again toward the light guide 17 by the curved reflecting surface 28 of the reflector 18. Then, the reflected reflected light α3 (secondary outgoing light, α2 <α3) passes through the light guide 17 from the first surface 30 while diffusing through the focal point f, and the second surface 31. Is emitted into the room.

  At this time, the passenger in the room recognizes the strong reflected light α1 reflected from the first surface 30 toward the reflector 18 as light emitted from the direction A of the distance L2. As a result, the plurality of light dots 32 appear to irradiate a plurality of lights. Therefore, the primary outgoing light α2 shines the dots 32 on the surface of the light guide 17, whereas the secondary outgoing light α3 reaches the reflector 18 where the dots 32 are arranged on the back side of the light guide 17. It appears to shine behind the distance L2 by the round-trip distance of. As a result, a mysterious depth like a starry sky with countless stars can be obtained.

  Further, even if the viewpoint of the passenger in the room is moved, the primary outgoing light α2 emitted from the point 32 to the indoor side does not move on the surface of the light guide 17, whereas the secondary outgoing light α2 re-reflected by the reflector 18. The incident light α3 appears to move quickly between the apex 29 and the apex 29 by the concave curved reflecting surface 28 in the direction opposite to the moving direction of the viewpoint. Due to the difference in the appearance of the primary outgoing light α2 and the secondary outgoing light α3, a further sense of depth and glitter can be obtained. Furthermore, by adjusting the interval between the dots 32, the curvature of the curved reflecting surface 28, and the interval between the apex 29 and the apex 29, various appearances can be adjusted.

As described above, according to the vehicular illumination device 10 of the present embodiment, the light of the LED 23 incident from the incident portion 22 of the light guide 17 is reflected toward the first surface 30 by the dot 32 of the light guide 17. Then, it is reflected to the reflector 18 side, reflected again to the light guide 17 side by the curved reflecting surface 28 of the reflector 18, passes through the light guide 17 and is emitted from the second surface 31 to the indoor side.
Thereby, compared with the conventional thing which radiate | emits the light which guided the inside of the light guide 17 simply, a feeling of depth can be acquired and the effect of the illumination which makes a mysterious way of lighting can be performed.

Moreover, according to the illuminating device 10 for vehicles, the illumination effect can be heightened by the some dot 32 being formed in the light guide 17. FIG.
Further, according to the vehicular illumination device 10, it is possible to obtain a glittering feeling as well as a depth feeling by the plurality of continuous curved reflecting surfaces 28 of the reflector 18.
Furthermore, according to the vehicular illumination device 10, the reflector 18 is a cylindrical step, so that the light from the light guide 17 is diffused and reflected and then incident on the light guide 17 to irradiate a wide range. Can do. Further, by moving the viewpoint in the room, it is possible to obtain a more sparkling feeling.

Further, according to the vehicular illumination device 10, a part of the incident light incident on the light guide 17 is spotted 32 on the surface of the light guide 17 by the primary emitted light α <b> 2 emitted from the spot 32 to the indoor side. Shine. On the other hand, the secondary outgoing light α3 that is reflected again by the reflector 18 and then passes through the light guide 17 and exits indoors reaches the reflector 18 in which the dot 32 is disposed on the back side of the light guide 17. Because it appears to shine in the back as much as the round-trip distance, you can get a mysterious depth feeling like an actual starry sky.
Further, when viewed while moving the viewpoint in the room, the primary outgoing light α2 reflected from the point 32 to the indoor side does not move on the surface of the light guide 17, whereas the secondary outgoing light re-reflected by the reflector 18 is reflected. α3 is quickly moved between the apex 29 and the apex 29 in the opposite direction to the moving direction of the viewpoint by the concave curved reflecting surface 28. Due to the difference in appearance between the primary outgoing light α2 and the secondary outgoing light α3, a further sense of depth and glitter can be obtained.

(Second Embodiment)
Next, a second embodiment of the vehicle lighting device according to the present invention will be described. In addition, about the structure same as 1st Embodiment mentioned above, description is simplified or abbreviate | omitted by attaching | subjecting the same code | symbol in a figure.

  As shown in FIG. 7, the vehicular lighting device 40 according to the second embodiment of the present invention is formed by integrally forming a light guide and a reflector, and a plurality of continuous illuminations are provided on the first surface side on the roof outer plate side. The light guide 41 having a curved aluminum deposition surface 42 is applied.

As the vehicular illumination device 40 emits light from the LED 23, a part of the incident light from the LED 23 that is incident from the incident portion 22 of the light guide 41 is emitted by the primary emitted light α <b> 2 that is emitted indoors by the dot 32. The dot 32 on the surface of the light guide 41 is illuminated.
On the other hand, another part of the incident light is reflected as a strong reflected light α1 on the curved vapor deposition surface 42 side by the dots 32. The strong reflected light α1 is reflected again by the curved vapor deposition surface 42, passes through the light guide 41, and is emitted from the second surface 31 to the indoor side as secondary emitted light α3 (α2 <α3). Since the secondary emitted light α3 appears to shine in the back by the reciprocating distance to the curved vapor deposition surface 42 where the dot 32 is arranged on the back side of the light guide 41, the secondary emitted light α3 is mysterious in combination with the primary emitted light α2. A sense of depth is obtained.

  In addition, when the viewpoint is moved in the room, the primary emission light α2 reflected from the point 32 to the room side does not move on the surface of the light guide 41, but is reflected by the curved vapor deposition surface 42. Since the next outgoing light α3 quickly moves in the direction opposite to the moving direction of the viewpoint, a further sense of depth and glitter can be obtained.

  As described above, according to the vehicle lighting device 40 of the present embodiment, the number of parts can be reduced by integrally forming the reflector on the light guide, and the reflecting surface can be a plurality of continuous curved vapor deposition surfaces 42. By this, it is possible to obtain a mysterious sense of depth and glitter.

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

10, 40 Vehicle lighting device 17, 41 Light guide 18 Reflector (reflective surface)
23 LED (light source)
28 Curved reflective surface 30 First surface 31 Second surface 32 Dotted (reflecting means)
42 Curved surface

Claims (5)

A light source;
The light source is disposed adjacent to the light source, has a first surface on the vehicle body side, and a second surface on the indoor side facing the first surface, and guides light of the light source incident from one end surface. A plate-shaped light guide that
A reflective surface that is disposed on the first surface side of the light guide and further reflects reflected light from the second surface toward the first surface;
A vehicle lighting device comprising:
The light guide includes a reflection unit configured to reflect incident light incident on the second surface from the one end surface toward the first surface.
The vehicle lighting device, wherein the reflection surface further reflects the reflected light reflected by the reflection means toward the first surface and emits the light from the second surface to the indoor side.   The vehicular lighting device according to claim 1, wherein the reflecting means is a plurality of line engravings or dot engravings.   The vehicle lighting device according to claim 1, wherein the reflecting surface is a reflector having a plurality of continuous curved reflecting surfaces.   The vehicle lighting device according to claim 3, wherein the reflector is a cylindrical step.   3. The vehicle lighting device according to claim 2, wherein a part of the incident light incident on the light guide body is emitted from a line or dot to the indoor side.

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