JP6699162B2 - Lighting equipment - Google Patents

Description

  The present invention relates to a lighting device, and more particularly to a lighting device for interior lighting of a vehicle.

  2. Description of the Related Art Conventionally, various measures have been taken for interior lighting in vehicles.

  Specifically, for example, in Patent Document 1, the emitted light of the primary light source is made incident on the light guide plate from the end face to be internally propagated, and the emitted light is emitted from the light guide plate by the directivity obliquely inclined in the direction of the internal propagation. Have proposed a lighting device for illuminating the feet. Further, in Patent Document 2, illumination light is incident from an end surface of a light guide having a cylindrical shape and propagates internally, and the inner surface of the door is illuminated from above by emitted light leaking from a peripheral side surface of the light guide. Some ideas have been proposed. Patent Document 3 proposes a device for arranging an edge light type surface light source device inside a door and changing a pattern related to the lining of the door depending on whether or not the surface light source device is illuminated.

  By the way, the interior lighting of the vehicle is required to efficiently illuminate the feet and the like so that the passenger does not feel glare. Further, it is required to secure sufficient designability (designability) so that the atmosphere inside the vehicle can be improved without impairing the atmosphere inside the vehicle.

JP, 2013-151268, A JP, 2013-86532, A JP, 2009-101840, A

  The present invention has been made in view of such a situation, and can efficiently illuminate the feet and the like without causing the passengers to feel glare, and also secure sufficient designability (designability). The purpose is to do.

  In order to solve the problem, in the present invention, the illumination light is emitted by effectively utilizing the directivity of the emitted light from the light guide plate, and the illumination light is emitted through the design layer. The idea that the appearance from the front side is changed depending on the presence or absence of illumination light has led to the completion of the present invention.

  Specifically, the present invention provides the following.

(1) primary light source,
A light guide plate that emits light emitted from the primary light source from an emission surface while internally propagating through the incident surface and propagating internally.
A design portion which is held on the exit surface side of the light guide plate and which transmits and emits the light emitted from the light guide plate;
Due to the directivity in which the direction obliquely inclined from the normal direction of the exit surface of the light guide plate to the direction of internal propagation is the exit direction of the exit light, the exit light from the light guide plate is transmitted through the design portion. A lighting device that emits light.

  According to (1), the emitted light is emitted from the light guide plate due to the obliquely directed directivity, so that it is possible to efficiently illuminate the feet and the like without causing the passenger to feel glare. Further, by emitting the emitted light through the design portion, sufficient designability (designability) can be secured.

(2) In (1),
The design section is
A first design layer seen from the side opposite to the light guide plate side in a state where the emitted light is not emitted from the primary light source,
A second design layer which is visible together with the first design layer from a side opposite to the light guide plate side due to transmission of the emitted light from the light guide plate in a state of emitting the emitted light from the primary light source. A lighting device to be equipped.

  According to (2), designability (designability) can be secured with a more specific configuration.

(3) In (1) or (2),
A lighting device located on the vehicle door.

  According to (3), it can be used to illuminate the door of the vehicle to efficiently illuminate the feet and the like without causing passengers to feel glare, and ensure sufficient designability (design). can do.

(4) In any one of (1), (2), and (3),
An illumination device that locally corrects the directivity of the light emitted from the light guide plate in the front direction of the light emitting surface of the light guide plate and emits the light.

  According to (4), it is possible to call attention to the back and the like.

(5) In any one of (1), (2), (3), and (4),
The primary light source is a lighting device in which the color of emitted light can be switched.

  According to (5), the color of the interior lighting can be switched in various ways to enhance the atmosphere and calm the occupant.

(6) In any one of (1), (2), (3), (4), and (5),
The light guide plate is
An illuminating device which is arranged on the back surface of an interior member manufactured by coating a transparent resin material and emits emitted light through the interior member.

  According to (6), the light guide plate can be protected by the interior member by effectively utilizing the configuration of the interior member.

(7) In any one of (1), (2), (3), (4), and (5),
The light guide plate is
An illumination device in which a back surface of an interior member made by coating a transparent resin material is raised, is integrally formed with the interior member, and emits emitted light through the interior member.

  According to (7), the light guide plate can be integrally configured by the interior member by effectively utilizing the configuration of the interior member.

(8) In any one of (1), (2) , (4), (6), and (7),
A lighting device arranged inside the vehicle.

  According to (8), it can be used for illuminating the passenger seat of the vehicle to efficiently illuminate the feet and the like without causing the passengers to feel glare, and has sufficient designability (design). Can be secured.

(9) In any one of (1), (2) , (4), (6) and (7),
A lighting device located in the front of the passenger seat of the vehicle.

  According to (9), it can be used for illuminating the passenger seat of the vehicle to efficiently illuminate the feet and the like without causing the passengers to feel glare, and has sufficient designability (design). Can be secured.

(10) A primary light source,
A light guide plate that emits light emitted from the primary light source from an emission surface while internally propagating through the incident surface and propagating internally.
A design portion which is held on the emission surface side of the light guide plate and which transmits and emits the light emitted from the light guide plate;
An illuminating device that emits light emitted from the light guide plate through the design portion by directivity in which a direction obliquely inclined from a normal line direction of the light exit face of the light guide plate is a main emission direction of the emitted light.

  According to (10), it is possible to ensure sufficient designability (designability) by allowing the occupant to feel no glare and emitting the emitted light through the design portion.

  ADVANTAGE OF THE INVENTION According to this invention, a passenger|crew can be illuminated efficiently, without making a passenger|crew feel a glare, and sufficient designability (designability) can be ensured.

It is a figure which shows the basic composition of the illuminating device 1 which concerns on embodiment of this invention. It is sectional drawing of the light guide plate which concerns on the illuminating device of FIG. It is a figure where it uses for description of the design part which concerns on the illuminating device of FIG. It is a figure where it uses for description of the vehicle which concerns on the illuminating device of FIG. It is a figure where it uses for description of a detailed structure of the illuminating device which concerns on the vehicle of FIG. It is a figure where it uses for description of the illuminating device which concerns on 2nd Embodiment of this invention. It is a figure where it uses for description of the illuminating device which concerns on 4th Embodiment of this invention. It is a figure where it uses for description of the illuminating device which concerns on 5th Embodiment of this invention. It is a figure which shows the other example of FIG. It is a figure where it uses for description of the illuminating device which concerns on 6th Embodiment of this invention.

[First Embodiment]
[Basic configuration of lighting device]
FIG. 1 is a diagram showing a basic configuration of a lighting device 1 according to an embodiment of the present invention. In the illuminating device 1, the primary light source 12 is arranged along the end surface 11A of the light guide plate 11 made of a transparent plate-shaped member (which is the incident surface on which the emitted light of the primary light source is incident). Here, in this embodiment, the primary light source 12 is provided with a plurality of light emitting diodes 12A that respectively emit emitted light, and the light emitting diodes 12A are formed at regular intervals along the incident surface 11A of the light guide plate 11. It Instead of the point light source using a light emitting diode, a point light source using a laser light source may be applied, or a rod light source using a cold cathode ray tube or the like may be applied. As a result, in the lighting device 1, the light emitted from the primary light source 12 is incident on the light guide plate 11 through the incident surface 11A of the light guide plate 11, and the incident light from the incident surface 11A is internally propagated through the light guide plate 11.

  Here, the light guide plate 11 internally propagates the incident light incident from the incident surface 11A, and emits the incident light from the emission surface 11B extending in the internal propagation direction, thereby forming a surface light source. For this reason, the light guide plate 11 is provided with a structure for promoting the emission of the internally propagating light on the emission surface 11B or a surface (hereinafter, referred to as a back surface) 11C facing the emission surface 11B. Here, the configuration that promotes the emission of the internally propagating light is, when locally producing a rough surface or the like that scatters the internally propagating light by printing, setting of a mold for manufacturing the light guide plate, or the like, Various configurations can be widely applied, such as in the case of providing various uneven shapes having the same function.

  However, in this embodiment, the back surface 11C of the light guide plate 11 has a strip shape extending along the incident surface 11A, and a slope facing the incident surface 11A (a vertical line facing the inside of the light guide plate is the incident surface. 14A, which is a slope that faces the side of the slope 14A, is repeatedly arranged in a direction orthogonal to the extension direction of the slope 14A. Here, the adjacent slopes 14A are connected by a connection surface formed by a plane opposite to the slope 14A or a connection surface 14B formed by a plane parallel to the incident surface 11A.

  When the light guide plate is made of a parallel plate, the internally propagating light propagates inside the light guide plate without being emitted from the emission surface and the back surface. On the other hand, when the inclined surface 14A facing the incident surface 11A is provided in this manner, the internally propagating light incident on the inclined surface 14A is reflected by the inclined surface 14A due to the inclination of the inclined surface 14A, and the emission surface 11B. The incident angle with respect to is reduced, and as a result, some components are incident on the emission surface 11B and emitted at an angle equal to or less than the critical angle. Further, although the incident light on part of the slope 14A is transmitted through the slope 14A and is emitted to the back side, such a component is reflected by the reflection member 16 described later and is re-reflected to the light guide plate 11. The light enters and is emitted from the emission surface 11B.

  As a result, in the illuminating device 1, the amount of emitted light at each part of the emitting surface 11B is adjusted by adjusting the inclination and width of the slope 14A, and the internally propagating light is emitted at a desired amount of light (for example, a uniform light amount distribution). Exit from. Similarly, by adjusting the inclination and width of the inclined surface 14A, the incident light from the incident surface 11A is sufficiently emitted from the emitting surface 11B until it reaches the opposite end surface from the incident surface 11A. The amount of internally propagating light reaching the side end surface is sufficiently reduced, and the loss due to reflection at the opposite end surface is sufficiently reduced. Further, the width of the slope 14A is set so that the uneven brightness due to the repetition of the slope 14A and the connection surface 14B is not perceived. In addition, in the structure in which the emission is promoted by repeating the inclined surface 14A and the connection surface 14B, the emission surface 11B may be provided within the range in which the directivity of the emission light emitted from the emission surface 11B is not impaired. Good.

Note that in such a repeated configuration of the slope 14A, a flat surface 14C is provided between the slope 14A and the connection surface 14B as shown in FIG. Damage may be reduced. Further, the flat surface 14C may be a surface inclined to the incident surface side or a surface inclined in the opposite direction. Further, in such a repeated configuration of the slope 14A, as shown in FIG. 2B, the slope 14A and the connection surface 14B are connected in a stepwise manner to form a slope, a connection surface, and a flat surface. Various modifications can be applied, such as when reducing uneven brightness due to repetition. When the emission of the internally propagating light is promoted by repeating the inclined surface, the connection surface, and the flat surface as described above, the adjustment of the emission light amount at each part of the emission surface 11B is simplified, and further, the loss due to the reflection on the opposite side end surface is simplified. Can be reduced.

  Here, in the light guide plate 11, the internally propagating light leaks out also from the back surface 11C which is a surface provided with the structure for promoting the emission. Therefore, in the lighting device 1, the rear surface 11C is provided with the reflection member 16 that reflects the internal propagating light leaking from the rear surface 11C and re-enters the light guide plate 11. Here, although various members that can secure a sufficient reflectance can be applied to the reflecting member 16, it is preferable to use a thin material from the viewpoint of reducing the thickness of the entire lighting device 1. .. In this embodiment, the reflecting member 16 is made of a white PET sheet, a silver-deposited transparent film material (for example, a PET film), or the like. Accordingly, the lighting device 1 improves the light utilization efficiency. Note that a white molding member may be applied instead of the sheet material and the film material. The reflecting member 16 may be provided with a light blocking member such as a light blocking sheet on the side opposite to the light guide plate 11. Further, the reflecting member may be omitted by making the function of a constituent member of a portion where the lighting device is arranged, or the like.

  In the light guide plate 11, the extension direction of the primary light source 12 (orthogonal to the propagation direction of the internally propagated light) is formed on all or part of the surface of the emission surface 11B and the rear surface 11C on the side where the structure for promoting the emission is not provided. A configuration may be provided for adjusting the spread of the emitted light in the direction of (). In addition, a configuration may be provided in which the directivity of emitted light is changed.

  Note that the configuration for adjusting the spread of the emitted light and the configuration for varying the directivity are configured by repeatedly producing convex stripes having a triangular cross section extending in the propagation direction of the internally propagating light in a direction orthogonal to the extending direction. can do. Further, the directivity of the emitted light can be variously adjusted by adjusting the cross-sectional shape of the ridge.

  In the illuminating device 1, the incident light that has entered the light guide plate 11 from the incident surface 11A, which is the end face, is emitted from the emission surface 11B of the light guide plate 11 while internally propagating, and is emitted from the emission surface 11B of the light guide plate 11. The emitted light L1 is emitted with a directivity in which a direction inclined to the internal propagation direction with respect to the normal line direction of the emission surface 11B is the main emission direction. More specifically, the emission angle θ from the emission surface 11B is emitted at an angle of 60 degrees or more and 70 degrees or less. As a result, in the lighting device 1, it is possible to efficiently illuminate the feet and the like without causing the passenger to feel glare.

  When the emitted light is emitted due to the directivity in which the direction that is inclined to the internal propagation direction is the main emission direction in this manner, the passenger does not feel glare, but the emission surface 11B looks bright and shining. Will be As a result, the luxury inside the vehicle may be impaired, and the atmosphere inside the vehicle may be impaired.

  Therefore, in the lighting device 1, the transparent member 18 is provided on the exit surface 11B of the light guide plate 11, and the transparent member 18 prevents damage to the exit surface 11B of the light guide plate 11 and the like. Here, for example, an acrylic plate material, a PC (polycarbonate) material, an ABS resin material, a PP resin material, a PS resin material, an LDPE resin material, or the like is applied to the transparent member 18.

  Using the transparent member 18, the lighting device 1 is provided with a design portion 19 on the light exit surface 11B side of the light guide plate 11, and the design portion 19 has a sufficient design property so as not to impair the atmosphere in the vehicle. (Design property) is secured.

  Here, the design portion 19 has a two-layer structure of first and second design layers 19A and 19B, and is located on the exit surface 11B side of the light guide plate 11 from the exit surface 11B side to the second and first design layers 19B. , 19A in this order. In the example of FIG. 1, the first and second design layers 19A, 19B are sequentially arranged on the incident surface of the transparent member 18. As a result, in the design portion 19, the first design layer 19A on the transparent member 18 side is visually recognized by the light from the transparent member 18 side in the state in which the emitted light is not emitted from the illuminating device 1, whereas When the light is illuminated from the light plate 11 side, the transmitted light of the first and second design layers 19A and 19B is visually recognized by the light emitted from the light guide plate 11.

  Here, the first design layer 19A is visually recognized by the light from the transparent member 18 side as described above, and has the same color and texture as the peripheral portion of the portion where the lighting device 1 is arranged, for example, the emission surface. 11B is made by printing or the like, as can be seen. Specifically, for example, it is made of a metal or a printed surface according to the color or texture of a metal tone panel.

  On the other hand, on the second design layer 19B, for example, a shade pattern as shown in FIGS. 3A to 3C is produced by printing or the like, and the color or texture different from the color or texture by the design layer 19A. It is manufactured as understood by. 3(A) and 3(B) are light and shade patterns of repeated cross patterns and honeycomb patterns, and FIG. 3(C) is a light and shade pattern of hair lines.

  Thereby, in this embodiment, sufficient designability (designability) is secured. In addition, such a design part 19 may arrange|position the 1st and 2nd design layers 19A and 19B in the output surface of the transparent member 18, and may arrange|position in the output surface and the entrance surface of the transparent member 18 separately. The light exit surface 11B of the light guide plate 11 may be collectively arranged, or the light entrance surface of the transparent member 18 and the light exit surface 11B of the light guide plate 11 may be separately provided. Further, the first design layer 19A may be composed of a plurality of layers so as to be separately provided on the entrance surface, the exit surface, etc. of the transparent member 18, and similarly, the second design layer 19B may be composed of a plurality of layers. The transparent member 18 may be provided separately on the incident surface, the outgoing surface, and the like, and various configurations can be applied to the arrangement of the first and second design layers 19A and 19B. Alternatively, the first and second design layers 19A and 19B may be printed on the transparent film material so as to be disposed between the light guide plate 11 and the transparent member 18.

  In short, the first and second design layers 19A and 19B may be integrated as long as the design changes between the observation from the front surface and the observation from the back surface with illumination. It may be composed of one layer. In the case of manufacturing by printing, the same effect may be obtained by printing with two colors or three or more colors, and further, the design layer may be partially not provided at all. The configurations of the first and second design layers 19A and 19B are such that if the reflection angle of incident light, the amount of light, and the color can be changed, unevenness is provided on the surface, particles are provided inside, and thickness is It is possible to widely apply various structures such as a structure in which the refractive index is changed in the direction and a minute change is made in the internal structure by laser irradiation. Further, a configuration utilizing a diffraction effect having reflectivity and transmissivity may be adopted. Further, as the member on the surface side of the first and second design layers 19A, any material may be applied as long as it has permeability, and a member obtained by processing holes or thinning processing on leather, cloth, wood, metal or the like. May be applied.

[Specific Configuration of First Embodiment]
FIG. 4 is a diagram showing the configuration of the vehicle according to this embodiment. In this vehicle 20, the lighting device 1 is arranged at each door. That is, the door 21 is provided with a door trim 23 below the portion where the window glass is arranged, and above the door trim 23, a door trim panel 25 is provided in a strip shape extending along the window. Here, the door trim 23 is an interior member made by injection molding a resin. The vehicle 20 is provided with a door knob 26 for opening and closing the door 21 at a front side portion of the door trim panel 25. Further, a horizontally elongated rectangular opening 25A is formed in a portion on the rear side of the door trim panel 25 where the door knob 26 is arranged, and the lighting device 1 is arranged by using the opening 25A.

  FIG. 5 is a cross-sectional view in which a substantially central portion of the opening 25A is cut in a direction along a short side of the opening 25A, which is a direction perpendicular to the ground surface, as indicated by a line AA. In the lighting device 1, the transparent member 18 is formed in a shape having a convex portion that covers the opening 25A from the back surface side and closes the opening 25A. As a result, the side surface of the door trim panel 25 is formed to be substantially flat including the portion of the opening 25A, and by providing the opening 25A, deterioration of design is effectively avoided.

  Further, a light guide plate 11 having a horizontally long and rectangular shape corresponding to the shape of the opening 25A is arranged on the back side of the transparent member 18, and a film material according to the design portion 19 is provided between the light guide plate 11 and the transparent member 18. 31 is arranged. Although the film material 31 is formed by forming the printing layers of the first and second design layers 19A and 19B on the transparent film material, the base material itself is applied to the first design layer 19A. Alternatively, the second design layer 19B may be formed on the base material by printing, and conversely, the base material itself may be applied to the second design layer 19B to form a first base layer on the base material. The design layer 19A may be formed by printing. Note that, as described above, the first and second design layers 19A and 19B may be arranged at various portions instead of being arranged between the light guide plate 11 and the transparent member 18 by the film material 31 as described above. it can.

  In the illuminating device 1, the primary light source 12 is arranged on the upper end surface of the light guide plate 11, and the upper single surface is the incident surface of the primary light source 12. The light guide plate 11 has an emission surface and a back surface corresponding to the setting of the incident surface. Accordingly, the illumination device 1 is configured to emit the illumination light 11 toward the lower side of the door 21 and locally illuminate the feet and the like of an occupant getting on and off the vehicle 20.

  The illumination device 1 is configured to include the primary light source 12 and cover the back side of the light guide plate 11 with a cover 32. The cover 32 is formed by injection molding a white resin material. The leaked light is prevented from leaking to the outside, and the light is re-incident on the light guide plate 11 to improve the light use efficiency. Instead of ensuring the function of the reflecting member 16 by the cover 2 as described above, a reflecting member may be separately arranged.

  Corresponding to the configuration of the illumination device 1, in the vehicle 20, when the door 21 is operated in the open state, the illumination device 1 is turned on by the power supply to the illumination device 1, and thus the passengers getting on and off the vehicle can get on and off. Locally illuminate your feet for the convenience of passengers. In addition, when the lighting of the lighting device 1 is instructed by the operation of the operating element by the user, the lighting device 1 is turned on, which makes it convenient for the passenger to check a map or the like.

  According to this embodiment, the occupant's feet are illuminated with the emitted light from the light guide plate, which has the directivity inclined to the inward propagation direction, and the illuminating light is emitted through the first and second design layers. By doing so, the appearance from the front side can be changed depending on the presence or absence of illumination light so that the passengers can efficiently illuminate their feet etc. without making the passenger feel glare and secure sufficient designability. be able to.

[Second Embodiment]
FIG. 6 is a diagram showing an illuminating device 41 according to the second embodiment of the present invention when viewed from the front direction of the emission surface. Note that FIG. 6A is a diagram with the transparent member removed, and is seen from the direction according to FIG. 4. This embodiment has the same configuration as the first embodiment except that the configuration according to FIG. 6 is different.

  In this lighting device 41, a directivity correction film 42 which is a transparent film material for correcting the directivity of the illumination light L1 is arranged on the emission surface 11B of the light guide plate 11. Here, the directivity correction film 42 corrects the emitted light L1 of the light guide plate 11 emitted from the both end regions ARA of the light guide plate 11 with the directivity obliquely inclined in the internal propagation direction in the front direction of the emission surface 11B. The remaining central area ARC is a film material that emits with the directivity as it is without correcting the obliquely directed directivity.

  Thus, as shown in FIG. 6B by taking a cross section along the line BB, the directional correction film 42 is repeatedly formed with the convex stripes 43 having a triangular cross section on the side opposite to the emission surface 11B of the area ARA. Then, the directivity of the incident light is corrected in the front direction by refraction by one of the pair of slopes related to the ridge 43. The ridge 43 may be provided on the light guide plate 11 side. Further, the directivity correction film 42 may be integrally formed with the film material of the design portion 19. Alternatively, the directivity correction film may be integrated with the light guide plate 11 by providing a projection on the exit surface 11B of the light guide plate 11. The ridge 43 can change the illumination direction (light distribution characteristic) by changing the shape, depth, pitch, extension direction, and inclination of the internally propagating light with respect to the propagating direction.

  As a result, in this illumination device 41, when the door is opened, the illumination light 11 is emitted toward the rear of the vehicle in both end regions ARA of the light guide plate 11, thereby ensuring the safety of passengers getting on and off. To do.

  In this way, instead of the both end regions ARA of the light guide plate 11, only one region of the both end regions ARA may be configured to emit the illumination light L1 toward the rear of the vehicle, and further, the both end regions ARA. In addition, the illumination light L1 may be emitted toward the rear of the vehicle only in a partial area of the central area ARC.

  Corresponding to the setting of this area, the lighting device 41 sets the light emitting diode 12A of the primary light source 12 in the area corresponding to the area ARA that emits the illumination light L1 to the rear and the light emitting diode 12A in the other area ARC. Is configured to be driven independently of. Accordingly, in this vehicle, depending on the setting by the user, for example, only the area ARA is driven by opening and closing the door to emit the illumination light L1 toward the rear of the vehicle so that the feet are not illuminated or the feet are illuminated. While emitting the illumination light L1 toward the rear of the vehicle. When used as an interior light, the light emitting diode 12A is not turned on in the area ARA that emits the illumination light L1 rearward so that the passenger does not feel glare.

  Instead of driving the one light guide plate 11 by dividing it into the regions ARA and ARC as described above, the light guide plate may be separately provided in the regions ARA and ARC to configure the lighting device. .. In this case, the light source of the area ARA may be completely independent of the area ARC and the area ARA may be illuminated from below or from the left or right direction. The colors may be different so that the area ARC and the area ARC can be clearly separated and visually recognized. Further, in the area ARA, the area ARC and the area ARC may be divided in terms of design (design) and illuminated by the same primary light source. Specifically, the eyes, ears, hands, feet, etc. of the specific character may be divided into areas ARA, and other parts of this character may be assigned to the area ARC so as to have different appearances.

  In this embodiment, even if the directivity of the illumination light is locally corrected in the front direction of the emission surface, the same effect as in the first embodiment can be obtained. Further, by correcting the directivity of the illumination light in the front direction of the emission surface in this manner, attention can be ventilated to the rear of the vehicle, and the safety of passengers can be ensured.

[Third Embodiment]
In this embodiment, the primary light source is configured by the light emitting diodes 12A of a plurality of colors, or the primary light source is configured by the light emitting diodes capable of switching the emission color. This embodiment has the same configuration as the first or second embodiment except that the configuration related to this primary light source is different.

  In this embodiment, the illumination light having various colors is configured to be emitted from the illumination device, and the color and/or amount of the illumination light L1 is changed according to a user's instruction. Instead of such an instruction from the user, it may be changed according to the state of the vehicle. Specifically, for example, when used for indoor lighting, when the color tone of the illumination light is changed from white to blue due to an increase in vehicle speed, indoor temperature, tiredness of passengers, etc. Etc. are possible. Instead of or in addition to this, the color and/or the amount of light may be changed depending on the emotion of the vehicle formed by anthropomorphizing the vehicle.

  Even if the color and the brightness of the illumination light are changed as in this embodiment, the same effect as that of the above-described embodiment can be obtained. In addition, by changing the color and the brightness in this way, the interior space of the vehicle can be rendered in various ways, and the convenience of the passenger can be further improved. Specifically, the lighting inside the vehicle can be switched in various ways to enhance the atmosphere, and the passengers can be calmed down.

[Fourth Embodiment]
FIG. 7 is a cross-sectional view for explaining the lighting device according to the fourth embodiment of the present invention in comparison with FIG. In the lighting device 51 of this embodiment, the function of the transparent member 18 is ensured by the door trim panel 25, so that the transparent member 18 is integrally formed by the door trim panel 25. The door trim panel 25 for this purpose is formed by injection molding a transparent resin material so as to close the portion related to the opening 25A, and the design portion 19 is formed by coating the entire front side surface. The lighting device 51 can obtain the same effects as those of the above-described embodiment except that the configuration according to FIG. 7 is different.

  According to this embodiment, since the transparent member can be integrated and omitted, the configuration can be simplified and the same effect as that of the above-described embodiment can be obtained.

[Fifth Embodiment]
It is sectional drawing with which the illuminating device which concerns on 5th Embodiment of this invention is demonstrated by contrast with FIG. 8 and FIG. In the lighting device 61 of this embodiment, the function of the light guide plate 11 is ensured by the door trim panel 25, and thus the light guide plate 11 is integrally configured by the door trim panel 25.

That is, in this embodiment, in the portion corresponding to the light guide plate 11 described above with reference to FIG.
The door trim panel 25 is formed by injection-molding a transparent resin, the door trim panel 25 rises in a substantially rectangular shape on the back side, the primary light source 12 is arranged in this raised portion, and the rear surface 11C of the light guide plate 11 is further configured. Is provided. As a result, the transparent member 18 is integrated with the door trim panel 25, and the light guide plate 11 is also integrated. In the door trim panel 25, the design portion 19 is produced by coating the entire front side surface. The illumination device 51 has the same configuration as that of the above-described embodiment except that the configuration according to FIG. 8 is different.

  According to this embodiment, since the light guide plate can be integrated, the structure can be further simplified and the same effect as that of the above-described embodiment can be obtained.

  As shown in FIG. 9 by comparison with FIG. 8, in the configuration of each of the above-described embodiments, with respect to the illumination light L2 that reaches the end portion in the internal propagation direction, a protrusion or the like is separately provided to prompt the emission. May be. By doing so, it is possible to further improve the utilization efficiency of the illumination light. Further, the emission direction of the illumination light can be set variously by selecting the shape of the convex portion.

[Sixth Embodiment]
FIG. 10 is a sectional view for explaining an illumination device according to a sixth embodiment of the present invention. In this vehicle 70, a horizontally long opening 71A is formed in an instrument panel trim panel 71 which is a front portion of the passenger seat, and an illumination device is provided so as to selectively illuminate the foot of the passenger seat through the opening 71A. Therefore, in the vehicle 70, the illuminating device is driven to illuminate the feet of the passenger in the passenger seat by operating the operator or opening/closing the door. In this embodiment, the configuration is the same as that of the above-described embodiment, except that the configuration relating to the arrangement location is different.

  Even if the lighting device is arranged in a portion in front of the passenger seat as in this embodiment, the same effect as that of the above-described embodiment can be obtained.

[Seventh Embodiment]
In the above-described embodiment, the case where the primary light source is arranged above the light guide plate to form the lighting device has been described, but in this embodiment, in each of the above-described embodiments, the light guide plate and the portion functioning as the light guide plate The primary light source is arranged on the side along the short side. It should be noted that the primary light source can be arranged at various parts as necessary, such as when it is arranged at the corner of the light guide plate by cutting off the corner of the light guide plate to form the incident surface.

  Further, the directivity of the emitted light of the light guide plate is corrected by disposing a member that corrects the directivity of the emitted light to the output surface of the light guide plate or by processing the emission surface of the light guide plate. The directivity can be corrected by repeatedly arranging the convex stripes having a triangular cross section and setting the sectional shape and extension direction of the convex stripes. In addition, for example, after correcting the outgoing light of the light guide plate due to the directivity inclined to the direction of the internally propagating light to the directivity in the front direction of the exit surface of the light guide plate, the directivity is further corrected in the direction of the feet so that there are two steps. Can be used to correct the directivity, or the ridges can be arranged so that the extension direction is inclined, and the directivity can be corrected in one step, and various configurations can be widely applied. As a result, in this embodiment, the light emitted from the light guide plate is emitted due to the directivity in which the main light emission direction is a direction that is obliquely inclined from the normal direction of the light emission surface of the light guide plate to a direction different from the partial propagation direction. Is transmitted through the design portion and emitted.

  Further, in this embodiment, corresponding to the arrangement of the primary light source, the slope 14A is directed to the primary light source side (see FIG. 1), and a configuration is provided that promotes the emission of the internally propagating light provided in the light guide plate, Thereby, the internally propagating light can be efficiently used.

  If the inclined surface 14B is arranged at an angle to the side of the primary light source without being completely oriented to the side of the primary light source, this obliquely inclined angle corrects the directivity inclined to the internal propagation direction. Internally propagating light can be emitted. As a result, instead of, or in addition to, the configuration in which the directivity is corrected by arranging the primary light source on the side of the light guide plate, the primary light source is disposed at Etc. can be efficiently illuminated.

  Even if the primary light source is arranged in a portion other than the upper end surface of the light guide plate as in this embodiment, the same effect as in the above-described embodiment can be obtained.

[Other Embodiments]
The specific configuration suitable for carrying out the present invention has been described above in detail, but the present invention can combine the above-described embodiments without departing from the spirit of the present invention, and further, the above-described embodiments can be combined. It can be variously changed.

  That is, in the above-described second embodiment, the case where the directivity is corrected by the convex stripe having the triangular shape in cross section so that it can be visually recognized from the rear is described, but the present invention is not limited to this, and instead of this, the emitted light It may be visible from behind due to scattering.

Further, in the above-described embodiment, the case where the lighting device is arranged on the door or the like has been described, but the present invention is not limited to this, and can be arranged on any part of the wall surface in the vehicle. Specifically, for example, it can be arranged on the driver side panel to illuminate the feet and the like so as not to disturb the driving. Further, it can be arranged on the back surface of the front seat to illuminate the feet of passengers in the rear seat, and can be used for reading, work, etc.

1, 41, 51, 61 Illuminating device 11 Light guide plate 11A Incident surface 11B Emitting surface 11C Emitting surface 12 Primary light source 12A Light emitting diode 14A Slope 14B Connection surface 14C Flat surface 16 Reflecting member 18 Transparent member 19 Design part 19A, 19B Design layer 20 , 70 Vehicle 21 Door 23 Door trim 25 Door trim panel 25A, 71A Opening 26 Door knob 31 Film material 32 Cover 34 Convex strip 42 Directional correction film 43 Convex 71 Instrument panel trim panel

Claims (9)

Primary light source,
A light guide plate that emits light emitted from the primary light source from an emission surface while internally propagating through the incident surface and propagating internally.
A design portion which is held on the exit surface side of the light guide plate and which transmits and emits the light emitted from the light guide plate;
The light guide plate has, on the back surface facing the emission surface, a slanted surface extending along the entrance surface, a flat surface, and a connection surface, which are in a direction orthogonal to the extension direction of the light. The inclined surface, the flat surface, and the connection surface are repeatedly arranged in this order in the direction along the internal propagation direction,
In a cross section parallel to the thickness direction of the light guide plate and the internal propagation direction,
The inclined surface is a surface in which a vertical line that faces the inside of the light guide plate faces the incident surface side,
The connecting surface has a smaller angle with the thickness direction of the light guide plate than the inclined surface, is a surface opposite to the inclined surface or parallel to the incident surface,
The flat surface has a larger angle with the thickness direction of the light guide plate than the connection surface and the inclined surface, a surface parallel to the emission surface, a surface inclined to the incident surface side, and an opposite side to the incident surface side. Is one of the surfaces inclined to
The flat surface connects the slope and the connection surface in a stepwise manner,
Due to the directivity in which the direction obliquely inclined from the normal direction of the exit surface of the light guide plate to the direction of internal propagation is the exit direction of the exit light, the exit light from the light guide plate is transmitted through the design portion. A lighting device that emits light. The design section is
A first design layer seen from the side opposite to the light guide plate side in a state where the emitted light is not emitted from the primary light source,
A second design layer which is visible together with the first design layer from a side opposite to the light guide plate side due to transmission of the emitted light from the light guide plate in a state where the emitted light is emitted from the primary light source. Prepare
The lighting device according to claim 1 . Placed on the vehicle door
The illumination device according to claim 1 or 2 . Locally, the directivity of the light emitted from the light guide plate is corrected in the front direction of the emission surface of the light guide plate, and the light is emitted.
The lighting device according to claim 1, claim 2, or claim 3 . The color of the emitted light of the primary light source can be switched.
The lighting device according to claim 1, claim 2, claim 3, or claim 4 . An interior member formed of a transparent resin material and having the design portion formed by coating on one surface,
The light guide plate is disposed on the back side, which is the surface opposite to the surface of the interior member on which the design portion is formed, and emits outgoing light through the interior member.
The lighting device according to claim 1, claim 2, claim 3, claim 4, or claim 5 . Formed of a transparent resin material, the design portion is formed by coating on one side, and the interior member is formed by bulging the back surface, which is the surface opposite to the surface on which the design portion is formed,
The light guide plate is integrally formed with the interior member as a raised portion of the back surface of the interior member, and emits outgoing light through the interior member.
The lighting device according to claim 1, claim 2, claim 3, claim 4, or claim 5 . Placed inside the vehicle
The lighting device according to claim 1, claim 2, claim 4, claim 6, or claim 7 . Located in the front of the passenger seat of the vehicle
The lighting device according to claim 1, claim 2, claim 4, claim 6, or claim 7 .

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