JP6088593B2 - Light guide device and illumination device - Google Patents

Description

  The present invention relates to a light guide device and an illumination device.

  The light from the various light sources is mixed through the optical system and can be provided to the viewer together for viewing through the headlight. Such an optical system can be used, for example, for an exterior headlight or exterior illumination device of a vehicle. With this outer headlight or outer lighting device, various signals from various light sources can be indicated.

  Patent document 1 has shown the window glass element provided with the flat board for illuminating the interior of a room. This plate is installed so that light is incident on its end face, and has a first flat area and a second flat area. Both flat areas are joined together by bonding materials. The first range is made of a first light guiding material, and the second range is made of a second light guiding material containing light scattering particles.

  A vehicle headlight device including at least one lens and provided with at least one light source behind the lens is known from Patent Document 2. In this case, the lens includes at least one first layer and second layer. The first layer is disposed toward the light source and is formed to be transparent. The second layer has a first range, and a notch is formed in the first range, so that light passing through the lens emitted from the light source passes only through the first layer in the range of the notch. Does not pass through the second layer.

  Patent Document 3 discloses a planar optical waveguide. The planar optical waveguide includes an opposite main side surface, at least one end surface as a light incident side surface, at least one main light guiding direction extending away from the light incident side surface, and at least for scattering light. One scattering means. At that time, the decoupling coefficient generated by the scattering means is variably adjusted along the main light guiding direction.

  The automotive tail lamp described in Patent Document 4 includes a lighting unit. The tail lamp comprises at least two layers of optical waveguide material with light scattering nanoparticles distributed in the medium. The illumination unit has at least one light entrance on each of at least one edge face of at least two layers of light guide material.

  Patent Document 5 discloses a vehicle headlight device having a plurality of separated light sources that emit light of various colors and a plurality of separated optical waveguides. The light guide is attached to the light source so that light emitted in various colors enters the light guide through the light incident surface, whereby at least two light guides guide light of different colors. In this case, the colored light of at least two optical waveguides is emitted from the first light exit surfaces of the at least two optical waveguides.

  An airplane cabin flat illumination lamp is disclosed in Patent Document 6 and includes one light box and one light source. The light from this light source enters the light box. The back wall of the light box is formed to be reflective, and the front wall of the light box is equipped with optical elements for directional radiation of light.

German Patent Application Publication No. 10201210898A1 German Patent No. 102011111994B3 German Patent Application Publication No. 102010018028A1 German Patent Application Publication No. 102011016402A1 German Patent Application Publication No. 102012017596A1 German Patent Application Publication No. 10201101206A1

  Based on this background, an object of the present invention is to provide a light guiding device and an illuminating device that uniformly irradiates an observer with light emitted from or emitted from various light sources through a light emitting surface.

  In order to solve this problem, a light guide device having the features of the independent claim and a lighting device including the light guide device having the features of the independent claim are proposed. Embodiments of the light guiding device and the lighting device are evident from the dependent claims and the description.

  The light guiding device according to the invention for at least two light sources which are different and / or independent from each other comprises a first body made of a transparent material and at least one first made of a material that is volume-scattering and thus translucent. Two main bodies are provided, and light from at least one first light source can enter the first main body and is guided or conveyed through the first main body of the light guiding device. The light from the at least one second light source first enters the at least one second body and is guided or conveyed through the at least one second body. Thereafter, the light from the at least one second light source passes through the at least one second main body, and then normally enters the first main body of the light guiding device, and is then guided or conveyed through the first main body. .

  Accordingly, the light of the at least one first light source and the light of the at least one second light source are guided through the first body together after having previously passed through the at least one second body. Volume scattering second body material has high opacity, whereas at least one first body transparent material generally has no or very little opacity. .

  In the case of the light guide device, the longitudinal section of the first main body is defined by two bases and two sides arranged in parallel to each other, and each base intersects with two sides, and each side has two sides. Crosses the bottom. Light emitted or emitted from at least one first light source is guided or transported through the first side and into the first body, and is guided or transported between the bottom sides of the first body, thereby Light exits the first body through the second side. The light emitted or emitted from the at least one second light source passes through the at least one second body, and then enters the first body through the first base of the first body. Guided or transported through. Thereafter, the light exits the first body through the second side. Therefore, the second side of the first body is provided in the embodiment as a common light emitting surface for the light coming out of at least two light sources and mixed in the first body. Therefore, the second side of the second main body is formed as a common light emitting surface for the light of all the light sources.

  In the embodiment with respect to the first body, a principal ray axis passing through the first body is provided or set, this principal ray axis usually extending in parallel between the two longitudinal axes of the first body. In this case, the light of at least one first light source is guided in a direction or parallel to the principal ray axis. The light from the at least one second light source first enters the at least one second body perpendicular to the principal ray axis and is then guided through the first body parallel to the principal ray axis.

  Furthermore, the longitudinal section of the at least one second body is likewise defined by two bases and two sides arranged in parallel to each other, in which case one base crosses the two sides, each 1 One side intersects with two bottom sides. At this time, the light of at least one second light source passes through the first side and enters the at least one second main body, and is guided or conveyed between the bottom sides. Light exits from the at least one second body through the second side. The light emitted from the at least one second light source then enters the first body through the first base of the first body.

  Usually, the first body and at least one second body are in contact with each other and / or connected to each other. In this regard, the second side of at least one second body whose longitudinal section is usually rectangular is connected to the first longitudinal side of the first body.

  In the embodiment of the light guiding device, the longitudinal section of the first main body is a right-angled trapezoid having two bottom sides and two sides arranged in parallel to each other, and the first side is light of at least one first light source. As an entrance for the two sides oriented obliquely with respect to two bases arranged parallel to each other, the second side being emitted from all light sources and mixed and / or superimposed in the first body The light exit is oriented perpendicular to both bases.

  The first side of the first body and the bottom side of at least one second body are oriented so as to form an acute angle with each other.

  The light of at least one first light source first enters the first body through the first side, and then is guided out of the first body through the second side. The light of at least one second light source passes through the at least one second main body, and then first passes from the outside to the first base that is oriented at an acute angle with respect to the first side, for example, at an angle of 45 °. It is incident on the first body and is normally reflected by the inner surface of the first side, and is guided out of the first body through the first body and then through the second side.

  In another embodiment of the light guiding device, at least one additional body as an optical element is attached to at least one of both sides of the first body. In this case, the at least one additional body is formed arbitrarily or amorphous in shape and is made of a material that scatters light, at least one optical module, such as at least one micro-optical module and / or at least one It has a prism and / or at least one light scattering surface or rough surface. At least one additional body is alternatively or in addition formed to direct the light beam. At least one additional body has a first side and a second side, and the longitudinal section is formed as a parallelogram, for example, a rectangle, a right trapezoid, or a triangle.

  In this case, the at least one additional body has a first side and a second side through which light is guided or transported into the additional body and through the second side. Light is guided or transported out of the additional body. If at least one additional body is attached to the first side of the first body, the second side of the additional body faces the first side of the first body. In this case, light from the first light source is first guided or conveyed through the first side of the at least one additional body to the at least one additional body, and The light enters the first body from the second side through the first side of the first body. In the case where at least one additional body is attached to the second side of the first body, the first side of the additional body faces the second side of the first body. In this case, the light emitted from all the light sources passes through the first main body, and then is guided or conveyed outside the first main body through the second side of the first main body. The light then passes through the second side of the additional body after passing through at least one additional body. The second side of the additional body serves as a common light emitting surface for the light of all light sources.

  The illumination device according to the invention comprises at least two different and / or independent light sources and an embodiment of the light guide device described above. The light guiding device includes a first body made of a transparent material and at least one second body made of a volume scattering material or a translucent material. The light emitted from the at least one first light source enters the first body and is guided through the first body. The light of at least one second light source first enters at least one second body, is guided through at least one second body, is incident on the first body, and then guides through the first body. Is done. Accordingly, the emitted light of the at least one first light source and the emitted light of the at least one second light source are combined together after the emitted light of the second light source has previously passed through the at least one second body. Guided through the first body.

  Generally, the first optical signal can be provided by the light of at least one of the first light sources, and the second optical signal can be provided by the light of at least one second light source. The light of the two light sources is then different, for example with respect to color, with respect to at least one frequency of its respective light spectrum and / or with respect to the shape of the respective signal or temporal change of the signal shape. Different functions can be optically shown simultaneously by different light from different light sources.

  The at least one light source comprises at least one light emitting diode or is formed as an optical waveguide.

  Furthermore, the light of at least one light source enters the light guide device through the first side of the main body of the light guide device, and is guided or conveyed through the light guide device.

  At least one light source is arranged immediately in front of the first side of the body of the light guiding device, i.e. the first body, the at least one second body or the additional body, and the light is directly from each of the at least one light source. It passes through this first side of the body and enters the light guide device and is guided or conveyed.

  Instead, the at least one light source is on the opposite side of the first side of each body of the light guiding device and is therefore not directly directed to the first side of each body. In this case, the light of at least one light source is projected perpendicularly onto the surface of the first side via the reflecting mirror, and then enters the light guide device through this first side of each body.

  The illuminating device comprises a cover plate arranged behind the main body, i.e. the second side of the first main body or the additional main body, so that the light emitted from both light sources exits the light guiding device and then the light of all light sources. Or guided through a cover plate as a common light emitting surface.

  The lighting device can be used for exterior lighting of vehicles, generally automobiles, in possible applications. In this case, at least one light source provides a signal for the taillight, the widthlight, the brake light and / or the direction indicator of the vehicle. Thus, at least two and thus a plurality of different functions are achieved by light from different light sources having different colors and / or signal shapes via the light emitting surface, ie via the second side of the light guide body or cover plate. Shown optically.

  Other effects and embodiments of the present invention will be apparent from the specification and the accompanying drawings.

  As will be appreciated, the features described above and those described below can be used not only in the combinations described, but also in other combinations or alone without departing from the scope of the invention.

  The invention is schematically illustrated in the drawing on the basis of an embodiment. The invention will be described schematically and in detail with reference to the drawings.

It is the schematic of 1st Embodiment of the light guide apparatus which concerns on this invention, and 1st Embodiment of the illuminating device which concerns on this invention. It is the schematic of 2nd Embodiment of the light guide apparatus which concerns on this invention, and 2nd Embodiment of the illuminating device which concerns on this invention. It is the schematic of 3rd Embodiment of the light guide apparatus which concerns on this invention, and 3rd Embodiment of the illuminating device which concerns on this invention. It is the schematic of 4th Embodiment of the light guide apparatus which concerns on this invention, and 4th Embodiment of the illuminating device which concerns on this invention. It is the schematic of 5th Embodiment of the light guide apparatus which concerns on this invention, and 5th Embodiment of the illuminating device which concerns on this invention.

  FIG. 1 schematically shows a first embodiment of a light guiding apparatus 2 according to the present invention. This light guiding device is formed as a constituent member of the first embodiment of the lighting device 4 according to the present invention. FIG. 2 schematically shows a second embodiment of the light guiding device 6 according to the present invention. This light guiding device is formed as a constituent member of the second embodiment of the lighting device 8 according to the present invention. FIG. 3 schematically shows a third embodiment of the light guiding apparatus 10 according to the present invention. This light guiding device is formed as a constituent member of the third embodiment of the lighting device 12 according to the present invention. FIG. 4 schematically shows a fourth embodiment of the light guiding apparatus 14 according to the present invention. This light guiding device is formed as a constituent member of the fourth embodiment of the lighting device 16 according to the present invention. FIG. 5 schematically shows a fifth embodiment of the light guiding apparatus 18 according to the present invention. This light guiding device is formed as a constituent member of the fifth embodiment of the lighting device 20 according to the present invention.

  1 to 5 will be described in relation to and across each other. Elements provided as constituent members of the light guide devices 2, 6, 10, 14, 18 and / or the illuminating devices 4, 8, 12, 16, 20 have the same reference numerals across the drawings. Is attached.

  Each embodiment of the light guiding devices 2, 6, 10, 14, 18 includes a first body 22 made of a transparent material and a second body 24 made of a volume scattering material.

  As is apparent from FIGS. 1 to 5, the first main body 22 has a vertical trapezoidal shape in which the illustrated longitudinal section has a first side 26, a second side 28, a first base 30, and a second base 32. I am doing. At that time, the bases 30 and 32 are arranged or oriented parallel to each other. The first side 26 and the first base 30 form an acute angle smaller than 90 °, and intersect each other at an angle of 45 °. On the other hand, the first side 26 and the second bottom side 32 form an obtuse angle larger than 90 °, and intersect with each other at an angle of 135 °. The second side 28 intersects each of the bottom sides 30 and 32 at a right angle, that is, at an angle of 90 °. Further, the first main body 22 has a rectangular transport section perpendicular to the longitudinal section shown in FIGS. When light is guided or transported through the first body, light is passed through this transport cross section.

  In the embodiment shown in FIGS. 1 to 5, the second main body 24 has a rectangular shape in which the longitudinal section has a first side 34, a second side 36, a first base 38, and a second base 40. . The second main body 24 further has a rectangular transport section perpendicular to the longitudinal section shown in FIGS. As light is guided or transported through the second body 24, light is passed through this transport section. Further, the first bottom surface 30 of the first main body 22 and the second side 36 of the second main body 24 are in contact with each other. In this case, the second side 36 of the second body 24 is completely covered by the first base 30 of the first body 22. On the other hand, the first base 30 of the first body 22 is only partially covered by the second side 36 of the second body 24. Thus, both bodies 22, 24 are arranged in direct contact with each other and are usually fixed to each other and / or in contact with each other. Furthermore, the intersection of the first side 26 and the first bottom 30 of the first body 22 and the intersection of the second side 36 and the second bottom 40 of the second body 24 are arranged in direct contact with each other.

  In addition to the elements described above that are components of all embodiments of the light guide devices 2, 6, 10, 14, 16, the second embodiment of the illumination device 6 shown in FIG. A typical body 42 and a second additional body 44 are provided. The first additional body is disposed on and / or in contact with the first side 26 of the first body 22, and the second additional body is the second side 28 of the first body 22. And / or in contact with this second side 28. In this case, the first additional body 42 has a parallelogram in longitudinal section, and the second additional body 44 has a rectangle in longitudinal section. Each of the additional bodies 42 and 44 has an arbitrary size and shape in the embodiment, and thus is formed in an amorphous shape. In other embodiments, the additional bodies 42, 44 each have a material that scatters light, at least one optical module, such as at least one micro-optic module and / or at least one prism and / or at least one light scatter. It has a surface or a rough surface.

  In the case of the third, fourth and fifth embodiments of the light guiding devices 2, 6, 10, 14, 16, an additional main body 46 is attached to the first side 26 of the first main body 22. . This additional body has the shape of a trapezoid with a vertical cross section. In this case, a gap is provided between the first side 26 of the first body 22 and the additional body 46. In this case, the additional body 46 is formed to orient the light beam.

  The first embodiment of the illumination device 4 includes a first light source 48, a second light source 50, a reflecting mirror 52, and a cover plate 62 in addition to the first embodiment of the light guide device 2. The second embodiment of the illumination device 8 includes a first light source 48, a second light source 50, and a reflecting mirror 52 in addition to the second embodiment of the light guide device 6. The third embodiment of the illumination device 12 includes a first light source 54, a second light source 50, and a reflecting mirror 56 in addition to the third embodiment of the light guide device 10. The fourth embodiment of the illumination device 16 includes a first light source 58 and a second light source 50 in addition to the fourth embodiment of the light guide device 14. In this case, each of the light sources 48, 50, 52, 54, 58 includes at least one light emitting diode. On the other hand, the 1st light source 60 of 5th Embodiment of the illuminating device 20 also provided with 5th Embodiment of the light guide apparatus 18 is formed as an optical waveguide. On the other hand, the 2nd light source 50 of 5th Embodiment of the illuminating device 20 is provided with the at least 1 light emitting diode.

  During operation of the first embodiment of the illumination device 4 and the light guide device 2, light is emitted from the first light source 48 and projected onto the reflecting mirror 52. The light of the first light source 48 reflected by the projector 52 enters the first main body through the first side 26 of the first main body 22. In this case, the light beam emitted from the first light source 48 strikes the first side 26 of the first body 22 at an angle of 45 ° and is further conveyed through the transparent first body 22. Light emitted from the second light source 50 enters the second main body through the first side 34 of the second main body 24 and is conveyed through the second main body 24 which is volume-scattered. The light emitted from the second light source 50 passes through the second main body 24, then exits from the second side 36 of the second main body 24, passes through the first bottom side 30 of the first main body 22, and the first main body 22. 22 is incident. The light emitted from the first light source 48 is mixed and / or overlapped with the light emitted from the second light source 50 in the first body 22.

  The light from both light sources 48 and 50 mixed and superimposed in the first body 22 passes through the first body 22 and then exits the first body through the second side 28 of the first body. Further, it is conveyed to the cover plate 62. In this case, the mixed or superposed light passes through the cover plate 62 as a common light emitting surface.

  During the operation of the second embodiment of the illumination device 8, and thus the operation of the second embodiment of the light guide device 6, the light emitted from the first light source 48 is projected onto the reflecting mirror 52, and this reflecting mirror Projected on the first additional body 42 starting from. This first additional body is here arranged on the first side 26 of the first body 22. In this case, the light emitted from the first light source 48 passes through the first additional body 42 and then enters the first body 22.

  In the case of the second embodiment of the light guiding device 6 and / or the lighting device 8, the light emitted from the second light source 50 is the same as in the first embodiment of the lighting device 4 and the light guiding device 2. Are conveyed through the second embodiment of the light guiding device 6. Within the first body 22, the light from the first light source 48 is mixed and / or superimposed with the light from the second light source 50. After passing through the first body 22, the light from both light sources 48, 50 exits from the second side 28 of the first body 22 and enters the second additional body 44. After passing through the second additional body 44, all the light leaves the second embodiment of the light guiding device 6 and / or the lighting device 8.

  In the case of the third embodiment of the illuminating device 12, and in the case of the third embodiment of the light guiding device 10, the light emitted from the second light source 50 is the light guiding device as in the above-described embodiment. 10 through the main bodies 24, 22. The light emitted from the first light source 54 of the third embodiment of the illuminating device 12 is first projected onto the reflecting mirror 56 and reflected by this reflecting mirror, and here of the additional body 46 at an angle of 90 °. Projected to the first side. After passing through this additional body 46 and after passing through the gap between the additional body 46 and the first body 22 of the light guiding device 10 of the third embodiment, the first light source 54 exits. Light enters the first body through the first side 26 of the first body 22. At that time, the light from the first light source 54 is superposed on the light from the second light source 50 in the first main body 22. The light of both the light sources 50 and 54 superimposed or mixed in this manner exits from the second side 28 of the first main body 22 as a common light emitting surface.

  During the operation of the fourth embodiment of the illumination device 16, and thus the fourth embodiment of the light guide device 14, the light emitted from the second light source 50 is first light as in the above-described embodiment. It is conveyed to the second main body 24 of the guide device 14 and then to the first main body 22. In this embodiment of the light guiding device 14 and the lighting device 16, the light of the first light source 58 is projected directly onto the additional body 46, here at an angle of 90 °. After light from the first light source 58 is incident on the additional body 46 and passes through the additional body, the light is also incident on the first body 22. The light from the first light source 58 that has passed through the first main body 22 of the light guiding device 14 is superposed and / or mixed with the light emitted from the second light source 50. The light superposed and / or mixed in this way exits from the second side 28 of the first body 22 as a common light emitting surface.

  In all the above-described embodiments of the lighting devices 4, 8, 12, 16, all the light sources 48, 50, 54, 58 are here formed as light emitting diodes, ie LEDs.

  In contrast, in the case of the fifth embodiment of the illumination device 20, the first light source 60 is formed as an optical waveguide. Of course, in the case of the fifth embodiment of the lighting device 20, as in the case of the fourth embodiment of the lighting device 16, the light emitted from the first light source 60 is applied to the additional body 46 at an angle of 90 °. The light is directly projected, overlapped and / or mixed with the light emitted from the second light source 50 in the first main body 22, and conveyed through the first main body 22.

22 1st main body 24 2nd main body 48, 50, 54, 58, 60 Light source

Claims (14)

A lighting device used for exterior lighting of a vehicle, comprising at least two light sources (48, 50, 54, 58, 60) and a light guiding device (2, 6, 10, 14, 18). And
  The light guiding devices (2, 6, 10, 14, 18)
  A first body (22) made of a transparent material;
  Comprising at least one second body (24) of volume scattering material;
  The first body (22) is a trapezoid having a vertical section defined by two bases (30, 32) and two sides (26, 28) arranged parallel to each other. The first side (26) of the two sides (26, 28) is oriented to form an oblique angle with respect to the two bottom sides (30, 32) arranged in parallel to each other, and the two sides The second side (28) of the sides (26, 28) is oriented perpendicular to the two bottom sides (30, 32);
  The at least one second body (24) is defined by two bases (38, 40) and two sides (34, 36), the longitudinal sections of which are arranged in parallel to each other. Rectangular,
  Light from at least one first light source (48, 54, 58, 60) is guided through the first body (22) and of at least one first light source (48, 54, 58, 60). Light enters the first main body (22) through the first side (26) of the first main body (22), and enters the two bottom sides (30, 32) of the first main body (22). Guided in between, light exits from the first body (22) through the second side (28) of the first body (22),
  The light of at least one second light source (50) is guided first through at least one second body (24) and then through the first body (22), and at least one second light source (50). Light from the light source (50) enters the at least one second body (24) through the first side (34) of the two sides (34, 36) of the second body (24). Then, the light is guided between the two bottom sides (38, 40) of the second body (24), and the light is the second side of the two sides (34, 36) of the second body (24). (36) through at least one second body (24) and then through the first base (30) of the two bases (30, 32) of the first body (22). The light incident on the first main body (22) and at least one second light source (50) is at least one. After passing through the second main body (24), the first main body (22) enters the first main body (22) through the first base (30), and then enters the first main body (22). The lighting device is guided between the two bottom sides (30, 32) of the first main body (22), and light is emitted from the first main body (22) through the second side (28) of the first main body (22). The lighting device according to claim 1 , wherein the first body and the at least one second body are in contact with each other and / or connected to each other. Said first body (22) the first side of (26), said base of at least one second body (24) (38, 40) is oriented at an acute angle with each other, according to claim 1 Or the illuminating device of 2 . At least one of the sides (26, 28) of said first body (22), at least one additional body as an optical element (42, 44, 46) is attached, claims 1 to 3 The lighting device according to any one of the above. The shape of the at least one additional body (42, 44, 46) is formed in an amorphous form and is a material that scatters light, at least one optical module, for example at least one micro-optical module and / or at least one. 5. Illumination device according to claim 4 , comprising a number of prisms and / or at least one light scattering surface. 6. Illumination device according to claim 4 or 5 , wherein at least one said additional body (42, 44, 46) is formed to direct light rays. At least one of the additional bodies (42, 44, 46) has a first side and a second side, and the longitudinal section is formed as a parallelogram, for example as a rectangle, as a right-angled trapezoid or as a triangle. The illumination device according to any one of claims 4 to 6 . At least one of said first light source (48,50,54,58,60) is provided with at least one light emitting diode lighting device according to any one of claims 1 to 7. The lighting device according to any one of claims 1 to 8 , wherein at least one of the first light sources (48, 50, 54, 58, 60) is formed as an optical waveguide. The light of at least one of the light sources (48, 50, 54, 58, 60) is transmitted through the main body (22, 24, 42, 44, 46) of the light guiding device (2, 6, 10, 14, 18). The illumination device according to any one of claims 1 to 9 , wherein the illumination device enters the light guide device (2, 6, 10, 14, 18) through one side (26, 34). At least one of the light sources (50, 58, 60) is disposed immediately in front of the first side (26, 34) of the main body (22, 24, 42, 44, 46) of the light guiding device (14, 18). Light is guided from at least one light source (50, 58, 60) directly through the first side (26, 34) of the respective body (22, 24, 42, 44, 46). Illumination device according to claim 10 , incident on the device (14, 18). At least one light source (48, 54) is on the opposite side of the first side (26) of the body (22, 42, 46) of the light guiding device (2, 6, 10), and at least one light source (48, 54) The light from the light sources (48, 54) is projected perpendicularly onto the surface of the first side (26) through the reflecting mirrors (52, 56), and passes through the first side (26) to the light guiding device ( The illuminating device according to claim 10 , which is incident on 2, 6, 10 ). The illumination device includes a cover plate (62) disposed behind the second side (28) of the main body (22), and light emitted from both light sources (48, 50) is emitted from the light guide device (2). The lighting device according to any one of claims 1 to 12 , which is then guided through the cover plate (62). 14. A signal according to any of the preceding claims, wherein at least one light source (48, 50, 52, 54, 58, 60) provides a signal for a taillight, a widthlight, a brake light and / or a turn signal. the lighting device according to an item or.

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