WO2016208388A1

WO2016208388A1 - Illuminating device for automobile cabin

Info

Publication number: WO2016208388A1
Application number: PCT/JP2016/067007
Authority: WO
Inventors: 理祥亀井; 悠人野々内; 優樹菅
Original assignee: 林テレンプ株式会社
Priority date: 2015-06-23
Filing date: 2016-06-08
Publication date: 2016-12-29
Also published as: JPWO2016208388A1; JP6755246B2

Abstract

An illuminating device 10 for an automobile cabin is provided with a decorative member 20 having an ornament 30 visible from the cabin interior (SP1) of an automobile 1, and a light-radiating part 40 for radiating light LT0 onto the ornament 30, the light-radiating part 40 being arranged such that the optical axis AX0 deviates from a direction D10 that is orthogonal to a general surface 31 of the ornament 30. The ornament 30 has an uneven part 35 in which the light LT0 from the light-radiating part 40 creates shade S0 in a front surface 30a of the ornament 30. The light-radiating part 40 may irradiate the front surface 30a of the ornament 30 with light, and may irradiate a rear surface 30b of the ornament 30 with light.

Description

Automotive interior lighting system

The present invention relates to an automotive interior lighting device.

A lighting device is installed in the passenger compartment of the automobile.
International Publication No. WO 2013/081070 discloses a light emitting ornament that has a light emitting region that emits light and is used for door lining. The light emission ornament includes an irradiating body that irradiates light toward the front of the light emitting region, a transmissive body that transmits light emitted from the irradiating body at a position in front of the irradiating body, and a transparent surface that is exposed. And a light-transmitting decorative layer formed at a front position of the body.

International Publication No. 2013/081070

Interior parts such as door linings are limited in shape and cannot be formed into a deep three-dimensional shape from the viewpoint of reducing the danger to passengers during a collision. The light-emitting ornament disclosed in International Publication No. 2013/081070 has a pattern on the decorative layer, but cannot express a deep modeling in the automobile room at night.
The above-described problems are not limited to door lining lighting devices, but also exist in various automotive interior lighting devices such as roof trim lighting devices.

The present invention has an object to provide an automotive interior lighting device capable of expressing a deeply shaped model in the room at the time of lighting within the constraints of the shape.

The automotive interior lighting device of the present invention has a decorative member having a decorative portion visible from the interior of the automobile,
A light irradiating unit that irradiates light on the decorative part, the optical axis being shifted from a direction orthogonal to the general surface of the decorative part,
The decoration part has an aspect having an uneven part in which a shadow is generated on the surface of the decoration part by light from the light irradiation part.

Moreover, the automotive interior lighting device of the present invention includes a decorative member having a decorative portion visible from the interior of the automobile,
A light irradiating unit that irradiates light on the decorative part, the optical axis being shifted from a direction orthogonal to the general surface of the decorative part,
The direction of the optical axis when projected on the general surface of the decorative portion is the projection surface optical axis direction,
The distance from the light irradiator in the direction of the projection surface optical axis is the projection surface distance,
When the maximum value and the minimum value appearing in the luminance according to the projection plane distance on the surface of the decoration portion when the light irradiation unit is turned on are arranged in order of the projection plane distance, the adjacent maximum value and minimum value are The maximum of the ratio having the local minimum value as the denominator is 1.5 or more.

According to the present invention, it is possible to provide an automotive interior lighting device capable of expressing a model with a depth when lighting in a room within a shape restriction.

FIG. 1 is a side view showing an example of the interior of an automobile equipped with an automobile interior lighting device in a state in which the illustration of a side surface is omitted. FIGS. 2A to 2C are views showing examples of interior materials to which an automotive interior lighting device is attached. FIG. 3 is a diagram schematically showing an example of a vertical end face when the automotive interior lighting device is cut at a position corresponding to A1 in FIG. FIG. 4A schematically shows an example of the vertical end surface when the decorative member is cut at a position corresponding to A1 in FIG. 2A, and FIG. 4B shows an example of the surface of the decorative member. FIG. FIG. 5 is a vertical cross-sectional view schematically showing an example of a decoration member mounting structure. FIG. 6 is a diagram schematically illustrating another example of the light irradiation unit. FIG. 7A schematically shows an example of the vertical end face of the lighting device with the first irradiation unit turned on, and FIG. 7B schematically shows an example of the vertical end face of the lighting device with the second irradiation unit turned on. FIG. FIG. 8 is a diagram schematically illustrating a configuration example of an electric circuit of an automobile. FIG. 9A is a diagram schematically showing an example of luminance according to the projection plane distance on the surface of the decoration portion when the first irradiation portion is turned on, and FIG. 9B is a view showing that the second irradiation portion is turned on. FIG. 9C schematically shows an example of the luminance according to the projection plane distance on the surface of the decorative part when the lighting is in progress, and FIG. 9C is when both light emitting parts are turned off and ambient light is incident from the outside of the vehicle The figure which shows the example of the brightness | luminance according to the projection surface distance in the surface of a decoration part in FIG. FIG. 10A schematically shows another example of the vertical end face of the lighting device with the first irradiation unit turned on, and FIG. 10B shows another example of the vertical end face of the lighting device with the second irradiation unit turned on. The figure which shows an example typically. FIG. 11A is a diagram schematically illustrating another example of the vertical end surface of the lighting device with the first irradiation unit turned on, and FIG. 11B is another drawing of the vertical end surface of the lighting device with the second irradiation unit turned on. The figure which shows an example typically. FIG. 12 is a view illustrating a modification in which the function of the light guide body of the second irradiation unit is provided to the light guide layer of the decorative member. FIGS. 13A and 13B are diagrams showing examples of interior materials to which another automotive interior lighting device is attached. FIG. 14 is a diagram schematically illustrating an example of a vertical end surface when the automotive interior lighting device is cut at a position corresponding to A2 in FIG. FIG. 15 is a diagram schematically illustrating an example of a vertical end surface when another automotive interior lighting device is cut at a position corresponding to A1 in FIG. FIG. 16A schematically shows an example of the vertical end face of the lighting device with the first irradiation unit turned on, and FIG. 16B schematically shows an example of the vertical end face of the lighting device with the second irradiation unit turned on. FIG.

Hereinafter, embodiments of the present invention will be described. Of course, the following embodiments are merely examples of the present invention, and all the features shown in the embodiments are not necessarily essential to the means for solving the invention.

(1) Summary of technology included in the present invention:
First, the outline of the technology included in the present invention will be described with reference to the examples shown in FIGS. FIGS. 1 to 16 are diagrams schematically showing examples. The enlargement ratios in the respective directions shown in these drawings may be different, and the drawings may not be consistent.

[Aspect 1]
The automotive interior lighting device 10 of the present technology includes a decorative member 20 and a light irradiation unit 40. The decorative member 20 has a decorative portion 30 that can be seen from the interior of the automobile 1 (for example, the passenger compartment SP1). The light irradiation unit 40 irradiates the decoration unit 30 with light LT0. The optical axis AX0 of the light irradiation unit 40 is deviated from a direction D10 orthogonal to the general surface 31 of the decoration unit 30. The decorative part 30 has a concavo-convex part 35 in which a shadow S0 is generated on the surface 30a of the decorative part 30 by the light LT0 from the light irradiation part 40.

When the light LT0 from the light irradiation unit 40 whose optical axis AX0 is deviated from the direction D10 orthogonal to the general surface 31 of the decoration part 30 is irradiated to the uneven part 35 of the decoration part 30, the shadow S0 of the uneven part 35 It occurs on the surface 30 a of the decorative part 30. For this reason, even if the shape of the decorative portion 30 is limited as the interior of the automobile 1, it is possible to express a deep modeling by the shadow that appears on the surface 30a of the decorative portion 30 when it is turned on. Therefore, this aspect can provide an automotive interior lighting device that can express a deeply shaped model in the room at the time of lighting within the constraints of the shape.

Here, the interior of the automobile includes a vehicle compartment, a luggage compartment, and the like.
Decoration means adding decoration, and a decoration member means a member that adds decoration to the interior of an automobile.
The light irradiation unit that irradiates the decoration part with light may irradiate the surface of the decoration part with light, or may irradiate the back surface of the decoration part from the opposite side to the interior.
Concavities and convexities mean unevenness. Therefore, the concavo-convex portion includes both a concave portion and a convex portion, a case where there is no concave portion and a convex portion, and a case where there is no convex portion and a concave portion.
The automotive interior lighting device of the present technology can be installed on a vehicle compartment side wall, a vehicle compartment ceiling, a vehicle compartment front, a cargo compartment side wall, and the like.
As illustrated in FIG. 14 and the like, the decorative member (120) may include the auxiliary unit 125 that is visible from the interior of the automobile and is not irradiated with light from the light irradiation unit, along with the decorative unit 30. Good. In this case, since the decorative portion 30 that is irradiated with light at the time of lighting is emphasized as compared with the auxiliary portion 125, an automotive interior lighting device capable of expressing a deeper model inside the room at the time of lighting within the constraints of the shape. Can be provided.

In addition, the said uneven | corrugated | grooved part 35 may have the convex part 36 projected on the said indoor (SP1) side. The curvature radius of the convex portion 36 may be 3.5 mm or more. In this aspect, since the convex portion 36 of the decorative portion 30 is a gently curved surface shape with a curvature radius of 3.5 mm or more, a deep modeling can be expressed indoors when the lamp is turned on within the constraints suitable as the shape of the interior part. An automotive interior lighting device can be provided.

[Aspect 2]
As illustrated in FIG. 7A and the like, the light irradiation unit 40 may irradiate the surface LT of the decoration unit 30 with the light LT1. In this case, when the light LT1 from the light irradiation unit 40 whose optical axis AX1 is deviated from the direction D10 orthogonal to the general surface 31 of the decoration part 30 is irradiated to the uneven part 35 of the decoration part 30, the shadow of the uneven part 35 is reflected. S1 occurs on the surface 30a of the decorative part 30. In this aspect, the light LT1 is irradiated on the surface 30a of the decorative portion 30, so that it is possible to provide an automotive interior lighting device that can express a model with a deeper depth when the lamp is turned on within the shape restriction.

[Aspect 3]
This illuminating device 10 may be provided with the interior member 70 which has arrange | positioned the said decorating member 20 in the said room | chamber interior (SP1) side. In addition, a shadow S 3 due to the light LT 1 from the light irradiation unit 40 being blocked by the decoration unit 30 may occur on the surface 70 a of the interior member 70. In this case, since the shadow S3 is generated on the surface 70a of the interior member 70 near the decoration portion 30 that is illuminated when the lamp is lit, it is possible to produce an effect that the decoration portion 30 is raised with respect to the interior member 70. Therefore, this aspect can provide an automotive interior lighting device capable of expressing the effect of raising the decorative portion with respect to the interior member during lighting.

In addition, this illuminating device 10 may be provided with the light-shielding cover part 75 arrange | positioned from the said light irradiation part 40 to the said indoor (SP1) side. Since this aspect makes it difficult for the occupant in the room (SP1) to see the light irradiation unit 40, it is possible to improve the beauty of the interior of the automobile.

[Aspect 4]
The light irradiator 40 is a first irradiator 50 that irradiates the surface 30a of the decorative portion 30 with the light LT1, and the optical axis AX1 is shifted from a direction D10 orthogonal to the general surface 31 of the decorative portion 30. A second irradiation unit 60 that irradiates the light LT2 on the back surface 30b of the decoration unit 30 from the side opposite to the irradiation unit 50 and the room (SP1), and the optical axis AX2 is orthogonal to the general surface 31 of the decoration unit 30 You may have the some irradiation part 42 containing the 2nd irradiation part 60 shifted | deviated from the direction D10 to perform. As illustrated in FIG. 8, the lighting device 10 may include a selection unit 80 that selects the irradiation unit 42 that irradiates the decoration unit 30 with the light LT0 from the plurality of irradiation units 42. In this aspect, since the shadow S0 generated on the surface 30a of the decoration part 30 becomes a shadow according to the selection of the irradiation part 42, it is possible to provide an automotive interior lighting device capable of expressing a deeper model in the room at the time of lighting. Can do. For example, the shadow S0 of the concavo-convex portion 35 is obtained when the light LT1 is irradiated on the surface 30a of the decorative portion 30 and when the light LT2 is irradiated on the back surface 30b of the decorative portion 30 from the side opposite to the room (SP1). The positional relationship is reversed. Therefore, when the irradiation unit 42 that irradiates the decoration unit 30 with the light LT0 is switched between the first irradiation unit 50 and the second irradiation unit 60, an effect such as trick art can be expressed.
Here, the plurality of irradiation units 42 may include irradiation units different from the first irradiation unit 50 and the second irradiation unit 60.

[Aspect 5]
The decorative portion 30 may have diffuse permeability. As illustrated in FIG. 7B and the like, the light irradiation unit 40 may irradiate the back surface 30b of the decoration unit 30 with the light LT2 from the side opposite to the room (SP1). In this case, since the decoration part 30 has diffusion permeability, the light LT2 irradiated on the back surface 30b of the decoration part 30 diffuses and exits to the room (SP1) side. Further, the light LT2 from the light irradiation unit 40 in which the optical axis AX2 is deviated from the direction D10 orthogonal to the general surface 31 of the decoration unit 30 is the uneven portion 35 of the diffuse transmission unit 30 from the side opposite to the room (SP1). , The shading S2 of the uneven portion 35 is generated on the surface 30a of the decorative portion 30. Therefore, this aspect can provide an automotive interior lighting device that can express a model with a deeper depth when the lamp is lit within the shape restrictions.
Here, diffuse transmission means transmission that diffuses light in many directions.

[Aspect 6]
As illustrated in FIG. 15 and the like, the decoration member (220) includes a light guide (for example, a light guide layer 22) disposed on the interior (for example, the vehicle compartment SP1) side of the decorative portion 30. Also good. Also in this case, when the light LT0 from the light irradiation unit 40 whose optical axis AX0 is deviated from the direction D10 orthogonal to the general surface 31 of the decorative part 30 is irradiated to the uneven part 35 of the decorative part 30, A shadow S0 is generated on the surface 30a of the decorative part 30. This shadow S0 is visible from the room through the light guide (22). Therefore, this aspect can provide an automotive interior lighting device that can express a model with a deeper depth when the lamp is lit within the shape restrictions.
[Aspect 7]
Moreover, the said decorating member 20 may have the light guide layer 22 by which the said decoration part 30 was laminated | stacked on the said indoor (SP1) side. The light irradiation unit 40 may cause the light LT2 to enter the light guide layer 22 from the edge 23 of the light guide layer 22 and irradiate the back surface 30b of the decoration unit 30. In this aspect, the light LT2 from the light irradiation unit 40 can be efficiently guided to the decoration unit 30, so that it is possible to provide an automotive interior lighting device that can express a deeper model in the room at the time of lighting. .

[Aspect 8]
The light LT2 incident on the light guide layer 22 from the light irradiation unit 40 may be emitted from the light guide layer 22 to illuminate the surface 70a of the interior member 70. This aspect can provide an automotive interior lighting device that can express a model with a deep interior (SP1) while illuminating the surface 70a of the interior member 70.

[Aspect 9]
Moreover, as illustrated in FIGS. 9A, 9 B, and the like, the automotive interior lighting device 10 of the present technology includes a decorative member 20 having a decorative portion 30 that is visible from the interior (SP1) of the automobile 1,
A light irradiating unit 40 that irradiates the decorative unit 30 with light LT0, the optical axis AX0 being deviated from a direction D10 orthogonal to the general surface 31 of the decorative unit 30;
The direction of the optical axis AX0 when projected onto the general surface 31 of the decorative part 30 is the projection surface optical axis direction D11,
The distance from the light irradiation unit 40 in the projection plane optical axis direction D11 is a projection plane distance Z,
The maximum value Li and the minimum value Lj appearing in the luminance L (Z) corresponding to the projection plane distance Z on the surface 30a of the decoration unit 30 when the light irradiation unit 40 is turned on are arranged in the order of the projection plane distance Z. The maximum ratio Li / Lj (for example, the maximum ratio Ron at the time of lighting) of the adjacent local maximum value Li and local minimum value Lj as the denominator is set to 1.5 or more. Have.

When the local maximum value Li and local minimum value Lj appearing in the luminance L (Z) corresponding to the projection plane distance Z on the surface 30a of the decorative portion 30 are arranged in the order of the projection plane distance Z, the adjacent local maximum value Li and local minimum value Lj The maximum (Ron) of the ratio Li / Lj with the minimum value Lj as the denominator corresponds to the luminance ratio between the shadow S0 and the high-intensity portion in the vicinity on the surface 30a of the decorative portion 30. Since the maximum (Ron) of the ratio Li / Lj is 1.5 or more, even if the shape of the decorative portion 30 is restricted as the interior of the automobile 1, a shadow S0 that appears on the surface 30a of the decorative portion 30 when it is turned on. It is possible to express deep modeling. Therefore, this aspect can also provide an automotive interior lighting device that can express a deep modeling in the room at the time of lighting within the constraints of the shape.
Here, the maximum means that the value of a certain function becomes maximum near a certain value of the variable, and the maximum value means that value. Minimal means that the value of a function is minimum in the vicinity of a certain value of the variable, and minimal means that value.

(2) Examples of automobiles:
FIG. 1 shows an example of the interior of an automobile to which an automobile interior lighting device 10 is attached, with the illustration of the side portion omitted. In these figures, FRONT, REAR, UP, and DOWN indicate front, rear, upper, and lower, respectively. The positional relationship between the left and right is based on the direction of looking in front of the automobile 1. Moreover, the code | symbol D1 shows the longitudinal direction of the decorating member 20, the code | symbol D2 shows the front-back direction of the motor vehicle 1, and the code | symbol D3 shows an up-down direction.
An automobile 1 shown in FIG. 1 is a road traveling automobile designed and equipped to be used on a road, and a vehicle body panel 2 as shown in FIG. 2 surrounds a passenger compartment SP1 (the interior of the automobile) and covers the vehicle body. Forming. The vehicle body panel 2 is formed of a metal such as a steel plate, for example. The automobile 1 is a wagon type passenger automobile including a three-row seat including a front seat 7a, a second seat 7b, and a third seat 7c. Of course, automobiles to which the present technology can be applied include so-called station wagons, one-box cars, and the like, as well as vehicles such as sedan types, and vehicles other than three-row seat types such as two-row seat types.

Various

interior materials

3, 4, 5, 6 are installed on the vehicle body SP 1 side of the vehicle body panel 2. The interior panel 3 for the front part for forming the front part of vehicle interior SP1, such as the instrument panel interior material 3a, is installed in the instrument panel of the vehicle front part. On the vehicle body panel on the side surface of the vehicle, a side surface interior material 4 for forming a side surface in the automobile compartment is installed. The side surface interior material 4 includes a side door trim 4a installed on the side door panel, a pillar garnish 4b installed on the pillar, a deck side trim 4c installed on the deck side panel, and the like. On the rear door panel of the rear part of the vehicle, a rear interior member 5 for forming the rear part of the cargo compartment SP2 (the interior of the automobile) such as the rear door trim 5a is installed. On the roof panel of the vehicle ceiling part, a ceiling interior material 6 for forming the ceiling part of the vehicle compartment SP1, such as a roof trim 6a, is installed.

The interior materials 3 to 6 include a lighting device 10A for the door trim 4a, a lighting device 10B for the pillar garnish 4b, a lighting device 10C for the deck side trim 4c, a lighting device 10D for the roof trim 6a, and an instrument. It is possible to install the illumination device 10 such as the illumination device 10E for the panel interior material 3a and the illumination device 10F for the rear door trim 5a. Of course, the present technology can be applied even if some of the lighting devices 10A to 10F are not provided. In the following specific example, the lighting device 10A for the door trim 4a will be described.

(3) Specific examples of lighting devices:
FIG. 2A shows the vehicle compartment SP1 side of the side door trim 4a to which the lighting device 10 is attached. A door trim 4a shown in FIG. 2A includes a trim lower (interior member 70) that constitutes a main part, a trim upper (cover 75) disposed at the upper edge of the door trim 4a, and a lighting device 10. An armrest 71, a pocket 72, and the like are attached to the trim lower (70). In the interior member 70 and the cover portion 75, a molded product formed by injection molding or the like of a resin material such as a thermoplastic resin, a molded product formed by injection molding or the like while foaming the resin material, a nonwoven fabric on the interior base material of the resin material, What laminated | stacked skin materials, such as a textile fabric and a knitted fabric, etc. can be used. The resin material includes polypropylene (PP) resin, acrylonitrile butadiene styrene (ABS) resin, modified resins obtained by adding elastomer to these synthetic resins, materials obtained by adding additives such as colorants and fillers to these resins, Etc. can be used.
The illuminating device 10 includes a decoration member 20 having a decoration portion 30 facing the passenger compartment SP1, and a light irradiation portion 40 that irradiates the decoration portion 30 with light LT0 as shown in FIGS. 2 (b) and 2 (c). I have. The decoration part 30 is visible from the passenger compartment SP1. Holders 28 are attached to both end portions 25 of the decorative member 20 in the longitudinal direction D1, and these holders 28 are attached to the trim lower (70) and the trim upper (75).

FIG. 3 schematically shows a vertical end surface when the lighting device 10 is cut at a position corresponding to A1 in FIG. FIG. 4A schematically shows a vertical end surface when the decorative member 20 is cut at a position corresponding to A1 in FIG. FIG. 4B schematically shows a surface of the decorating member 20 on the vehicle compartment SP1 side. In these drawings, the symbol D4 indicates the width direction of the automobile 1. In FIG. 3 and FIG. 4A, hatching indicating a cross section of the decorative member 20 is omitted for easy understanding.
As shown in FIG. 3, the light irradiation unit 40 includes a first irradiation unit 50 that irradiates the light LT1 onto the surface 30a of the decoration unit 30 from the vehicle compartment SP1 side, and a side opposite to the vehicle compartment SP1 (the vehicle outer side). The back surface 30b of the decoration part 30 has the 2nd irradiation part 60 which irradiates light LT2. In addition, when the 1st irradiation part 50 irradiates light LT1 to the surface 30a of the decoration part 30 from vehicle interior SP1 (indoor) side, the 1st irradiation part 50 is not the back surface 30b side with respect to the decoration part 30, but the surface 30a side. Means that In addition, when the second irradiation unit 60 irradiates the light LT2 on the back surface 30b of the decoration unit 30 from the side opposite to the passenger compartment SP1 (indoor), the second irradiation unit 60 is not on the front surface 30a side with respect to the decoration unit 30. It means that it exists in the back surface 30b side. The optical axis AX1 of the first irradiation unit 50 is deviated from the direction D10 orthogonal to the general surface 31 excluding the uneven portion 35 in the decoration unit 30. The optical axis AX2 of the second irradiation unit 60 is also deviated from the direction D10 orthogonal to the general surface 31 excluding the uneven portion 35 in the decoration unit 30. Accordingly, the optical axes AX0 of both the

irradiation units

50 and 60 are shifted from the direction D10 orthogonal to the general surface 31 of the decoration unit 30.

Here, the optical axis means a center line of light emitted from the light irradiation unit. For example, when the decoration part is directly irradiated with light from the light source, the central axis in the design of the light source corresponds to the optical axis. In this specification, the optical axis AX0 is a generic term for the optical axes AX1, AX2, and the light LT0 is a generic term for the light LT1, LT2.
The decoration part 30 shown in FIG. 3 is a part facing the room (vehicle room SP1) within a range that can be normally seen from the room (car room SP1) in the decorative member 20. As illustrated in FIG. 3, when the light-shielding cover 75 is disposed on the indoor (vehicle compartment SP1) side from the decorative member 20, the interior of the decorative member 20 is not covered with the cover 75 (vehicle compartment SP1). The part facing the. The decoration part 30 of the decorating member 20 shown to FIG. 3 and FIG. 4 (a) becomes a site | part from the highest point P1 to the lowest point P2.

The general surface 31 of the decorative portion 30 means a surface when it is assumed that the surface 30a of the decorative portion 30 does not have the uneven portion 35 where the shadow S0 is generated. In this specific example, the general surface 31 is also a surface excluding the uneven portion 35, Alternatively, it may be a gently curved surface having a radius of curvature of about 100 mm or more (preferably about 150 mm or more, more preferably about 200 mm or more).
When the general surface 31 is a curved surface, the direction D10 orthogonal to the general surface 31 is a direction orthogonal to the plane representing the average inclination of the general surface 31. For example, as shown in FIGS. 3 and 4A, when the general surface 31 is curved in a vertical section, the direction D10 orthogonal to the general surface 31 is orthogonal to the plane passing through the uppermost point P1 and the lowermost point P2. Direction.

The decorating member 20 is a substantially plate-like member having a light guide layer 22 in which a decorative portion 30 is laminated on the vehicle compartment SP1 side. The decorative member 20 is disposed with the planar decorative portion 30 facing the vehicle compartment SP1 and the longitudinal direction D1 facing the substantially front-rear direction D2. The back surface 20 b of the decorative member 20 shown in FIG. 3 is also the back surface of the light guide layer 22 and faces the interior member 70. The upper edge portion 23 of the light guide layer 22 is a portion on which the light LT2 from the second irradiation unit 60 is incident, and is an incident surface having regular transmittance so that reflection and diffusion are suppressed. Here, regular transmission means transmission of light according to the law of refraction when viewed macroscopically. Of course, having regular transmission includes having at least one of a reflection component and a diffusion component while mainly using the regular transmission component. The lower edge portion 24 of the light guide layer 22 is a portion from which the light LT2 incident from the upper edge portion 23 is emitted, and is an emission surface having regular transparency so that reflection and diffusion are suppressed.
For the light guide layer 22, a transparent molded product obtained by molding a transparent material by a known method such as injection molding can be used. Transparent materials such as acrylic (PMMA) resin, polycarbonate (PC) resin, acrylonitrile butadiene styrene (ABS) resin, silicone (SI) resin, polyethylene (PE) resin, polypropylene (PP) resin are used as the transparent material. Materials and the like can be used.

The decoration part 30 has diffuse reflectivity with respect to light from the passenger compartment SP1, and has diffuse transmittance with respect to light from the opposite side to the passenger compartment SP1. Here, diffuse reflection means reflection that diffuses light in many directions. As described above, diffuse transmission means transmission that diffuses light in many directions. Of course, having diffuse reflectivity includes the presence of a transmissive component with a diffuse reflection component as a main component. Having diffuse transmission includes that there is a reflection component while mainly using the diffusion transmission component. The decorative portion 30 is preferably in a mud state with few regular reflection components such that both transmitted light and reflected light are light rays having a Lambertian angular intensity distribution (nondirectionality). Since the decoration part 30 has diffuse reflection, the reflection of the first irradiation part 50 on the decoration part 30 is suppressed, and the appearance is improved. Since the decorative part 30 has diffuse permeability, an effect of illuminating the decorative part 30 like a lantern appears.

The decoration part 30 has a concavo-convex part 35 having a shape in which a shadow S0 is generated on the surface 30a of the decoration part 30 by the light LT0 from the light irradiation part 40. When the light LT1 from the first irradiation unit 50 is irradiated onto the surface 30a of the decoration part 30, a shadow S1 due to the uneven part 35 is formed on the surface 30a of the decoration part 30. When the light LT2 from the second irradiation unit 60 is applied to the back surface 30b of the decoration part 30, a shadow S2 due to the uneven part 35 is formed on the surface 30a of the decoration part 30. In this specification, the shadow S0 is a general term for the shadows S1 and S2. When the height of the concavo-convex portion 35 is gradually changed according to the position in the longitudinal direction D1 as shown in FIG. 2A, the heights of the shadows S1 and S2 are changed as shown in FIGS. 2B and 2C. It can be gradually changed according to the position in the longitudinal direction D1.
The concavo-convex portion 35 shown in FIG. 3 and the like has a convex portion 36 that is convex toward the passenger compartment SP1 side. The curvature radius of the convex portion 36 is set to 3.5 mm or more from the viewpoint of reducing harm to the occupant at the time of collision. Of course, the concavo-convex portion 35 may have a concave portion that is concave toward the opposite side to the passenger compartment SP1. The shapes of the shades S1 and S2 can be arbitrarily changed by the uneven shape of the uneven portion 35, the curved surface shape of the general surface 31, the arrangement of the light irradiation unit 40, and the like.

The decoration part 30 can employ a light diffusion film having a light diffusibility, a rough surface shape, or the like. The light diffusion film is preferably a low gloss mud film. For example, a synthetic resin film in which a light diffusing agent is dispersed can be used. As the light diffusing agent, glass beads, plastic beads, or the like can be used. The synthetic resin for dispersing the light diffusing agent is preferably a resin having transparency, bead dispersibility, light resistance, and moisture resistance. For example, an acrylic resin, a melamine resin, a silicone resin, an epoxy resin, or the like is used. it can. Alternatively, the light guide layer 22 may be formed by forming a rough shape on the surface of the light guide to be the light guide layer 22 and laminating the decorative portion 30 on the indoor side. This rough surface shape may be formed by, for example, a roughening process in which a blast material is sprayed on the surface of the light guide, or formed by injecting a resin material into a mold having a rough surface shape. May be.

The decoration member 20 may be fixed to the interior member 70 and the cover portion 75 with an adhesive or the like, but may be fixed to the interior member 70 and the cover portion 75 with a holder 28 as shown in FIG. FIG. 5 is a vertical sectional view schematically showing an example of the attachment structure of the decorative member 20. The holder 28 fixed to the both end portions 25 of the decorating member 20 in the longitudinal direction D1 has a boss 28e protruding from the concave portion 28d into which the end portion 25 of the decorating member 20 is inserted and the rear surface 28b to the opposite side to the vehicle compartment SP1. , And an extended portion 28f extending upward from the upper edge portion 28c. When the end 25 of the decorating member 20 is inserted into the recess 28 d of the holder 28, the holder 28 is attached to the end 25 of the decorating member 20. You may fix the decorating member edge part 25 and the holder recessed part 28d with an adhesive agent.

The extending portion 28f is formed with an insertion hole 28g through which the boss 76 protruding from the back surface 75b of the cover portion 75 to the opposite side to the vehicle compartment SP1 is passed. For example, the boss 76 of the cover 75 is passed through the insertion hole 28g of the holder 28, the pedestal 76b of the cover 75 is abutted against the extension 28f, and the tip of the boss 76 is welded by the welding means. The holder 28 attached to the member end portion 25 is fixed to the cover portion 75.
The interior member 70 is formed with an insertion hole 70 c for allowing the boss 28 e of the holder 28 to pass therethrough. For example, the boss 28e of the holder 28 is passed through the insertion hole 70c of the interior member 70, the back surface 28b of the holder 28 is applied to the front surface 70a of the interior member 70, and the tip of the boss 28e is welded by the welding means. A holder 28 attached to the end 25 is fixed to the interior member 70.

Of course, the decorative member 20 may be fixed to the interior member 70 without being fixed to the cover portion 75, may be fixed to the cover portion 75 without being fixed to the interior member 70, or the vehicle body panel. The interior member 70 and the cover 75 may be fixed to a different part.
In principle, the present technology realizes a shading effect depending on the positional relationship of each component, regardless of the size of the decorative member 20. When considering that the lighting device 10 is for an automobile interior, the size of the decorative member 20 is, for example, 2000 mm or less in length in the longitudinal direction D1, 1500 mm in height (length in the vertical direction D3), and The thickness (length in the width direction D4) may be 200 mm or less.

1st irradiation part 50 has light source 51 which emits light LT1 with which surface 30a of decoration part 30 is irradiated. The light source 51 may be arranged to directly irradiate the decoration part 30 with the light LT1 as shown in FIG. 3, or arranged to irradiate the light LT1 via the light guide 52 shown in FIG. Also good. The angle θh1 formed by the optical axis AX1 of the first irradiation unit 50 and the direction D10 orthogonal to the general surface 31 is not 0 ° but 90 ° so that the shadow S1 is formed on the surface 30a of the decoration unit 30. Within the following range, the angle is preferably 45 ° ≦ θh1 ≦ 89 °, more preferably 60 ° ≦ θh1 ≦ 88 °, and still more preferably 75 ° ≦ θh1 ≦ 87 °. As shown in FIG. 7A, the first irradiation unit 50 irradiates the surface 30a of the decorative portion 30 with the light LT1 from the upper side of the convex portion 36, so that the surface 30a on the lower side starting from the convex portion 36 is formed. A shadow S1 is generated, and a high-luminance portion H1 is generated on the surface 30a on the upper side starting from the convex portion 36. Moreover, since the decorating member 20 is arrange | positioned from the interior member 70 to vehicle interior SP1 side, the shadow S3 by the light LT1 from the 1st irradiation part 50 being interrupted by the decoration part 30 is in the surface 70a of the interior member 70. It occurs under the decorative member 20.

The second irradiation unit 60 includes a light source 61 that emits light LT2 that is applied to the back surface 30b of the decoration unit 30. As shown in FIG. 3, the light source 61 may be arranged to directly irradiate the decoration part 30 with the light LT2, or arranged to irradiate the light LT2 via the light guide 62 shown in FIG. Also good. The angle θh2 formed by the optical axis AX2 of the second irradiation unit 60 and the direction D10 orthogonal to the general surface 31 is not 0 ° but 90 ° so that the shadow S2 is formed on the surface 30a of the decoration unit 30. Within the following range, the angle is preferably 45 ° ≦ θh2 ≦ 89 °, more preferably 60 ° ≦ θh2 ≦ 88 °, and still more preferably 75 ° ≦ θh2 ≦ 87 °. The light LT2 is incident on the light guide layer 22 from the upper edge portion 23 of the light guide layer 22 and irradiated to the back surface 30b of the diffusely transmissive decorative portion 30, so that the decorative portion 30 is illuminated like a lantern. Further, as shown in FIG. 7B, a shadow S2 is generated on the surface 30a on the upper side starting from the convex portion 36, and a high brightness portion H2 is generated on the surface 30a on the lower side starting from the convex portion 36. The positional relationship between the shadow S2 by the second irradiation unit 60 and the high luminance part H2 is opposite to the positional relationship between the shadow S1 by the first irradiation unit 50 and the high luminance part H1. Thus, since the luminance distribution of the decoration part 30 by the light LT2 from the second irradiation unit 60 is different from the luminance distribution by the light LT1 from the first irradiation unit 50, the first irradiation unit 50 is turned on when the second irradiation unit 60 is turned on. An effect different from the lighting state of is expressed. Furthermore, since the light LT2 incident on the upper edge portion 23 of the light guide layer 22 from the second irradiation unit 60 is emitted from the lower edge portion 24 of the light guide layer 22, the high luminance portion H3 due to the emitted light is reflected on the interior member 70. It occurs below the decorative member 20 on the surface 70a.

The

light sources

51 and 61 may be LEDs (light emitting diodes), incandescent bulbs, halogen bulbs, fluorescent lamps, discharge lamps, or the like. The LED is lightweight and has a long life, and is preferable in terms of power saving, space saving, and the like (having directivity in the irradiation direction). Various colors such as white, red, green, and blue can be adopted as the light emission color of the light source, and light sources of different emission colors may be used in combination in the same automobile.

FIG. 6 schematically illustrates an example of a light irradiation unit that irradiates the decoration unit 30 with the light LT1 and LT2 from the

light sources

51 and 61 via the long light guides 52 and 62, respectively. The light guides 52 and 62 shown in FIG. 6 are substantially quadrangular columnar rod-like members, and are arranged with the longitudinal direction D1 facing the substantially front-rear direction D2. End surfaces 52c and 62c in the longitudinal direction D1 of the light guides 52 and 62 are portions where the light LT1 and LT2 from the

light sources

51 and 61 are incident, and are incident surfaces having regular transparency so that reflection and diffusion are suppressed. It is said that. The optical axes AX1 and AX2 from the

light sources

51 and 61 toward the end faces 52c and 62c are oriented substantially along the longitudinal direction D1. In the light guides 52 and 62, the emission surfaces 52a and 62a on the decorative portion 30 side are portions where the light LT1 and LT2 reflected by the reflection surfaces 52b and 62b on the opposite side of the decorative portion 30 are emitted, It has regular permeability so that diffusion is suppressed. A plurality of

concave portions

53 and 63 for reflecting the light LT1 and LT2 incident from the end surfaces 52c and 62c toward the emission surfaces 52a and 62a are formed in the reflection surfaces 52b and 62b at intervals in the longitudinal direction D1. . On the

reflective surfaces

52b and 62b having the

recesses

53 and 63, a reflective layer such as a metal layer that increases the reflectance may be laminated. The shapes of the

recesses

53 and 63 are designed such that the optical axes AX1 and AX2 from the emission surfaces 52a and 62a toward the decoration portion 30 are oriented as shown in FIG. A preferable shape of the

recesses

53 and 63 is that the light beams LT1 and LT2 incident from the end surfaces 52c and 62c, such as a cross-sectional groove shape tapering from the reflection surfaces 52b and 62b toward the inside of the light guides 52 and 62, are output surfaces 52a, For example, the shape has an inclined surface to be reflected toward 62a.

As the light guides 52 and 62, a transparent molded product obtained by molding a transparent material by a known method such as injection molding can be used as in the light guide layer 22. As the transparent material, a resin material having transparency such as PMMA resin, PC resin, ABS resin, SI resin, PE resin, PP resin, or the like can be used.
In addition, each surface (

surface

52a, 52b, 52c, 62a, 62b, 62c etc.) of the light guides 52 and 62 may be formed not only on a plane but also on a part or all of a curved surface. In addition, the light guides 52 and 62 may be not only linearly extended but also partially or entirely extended in a curved shape.

In the case where the decoration member 20 is a member that is very long in the longitudinal direction D1, in order to directly irradiate the decoration part 30 with the light LT1 and LT2 from the

light sources

51 and 61, the number of light sources Need to be more. In such a case, if the

light sources

51 and 61 are arranged so as to irradiate the decoration part 30 with the light LT1 and LT2 through the light guides 52 and 62 as shown in FIG. 6, the number of light sources can be reduced, The cost of parts can be reduced. In addition, power consumption can be reduced. Of course, when controlling the irradiation of the light LT1 or LT2 for each part of the decoration part 30 such as irradiating the decoration part 30 with the light LT1 or LT2 so as to flow in the longitudinal direction D1, the light from the

light sources

51 and 61 is controlled. You may irradiate the decoration part 30 directly with light LT1, LT2.

The illumination device 10 may include a selection unit 80 that selects an irradiation unit that irradiates the decoration unit 30 with the light LT0 from the plurality of irradiation units 42 including the first irradiation unit 50 and the second irradiation unit 60. FIG. 8 is a block diagram showing a control unit 80U that controls an illumination system such as the illumination device 10 and the surrounding electric circuit. An ECU (Electronic Control Unit) that controls the illumination system can be used as the control unit 80U.
To the control unit 80U shown in FIG. 8, various switches including switches SW1 and SW2, various light sources including

light sources

51 and 61, and the like are connected. The switches SW1 and SW2 include an operation switch that receives an operation from the occupant, a door open detection switch that switches depending on whether the door is open, a door lock detection switch that switches depending on whether the door is locked, or an ignition. An ignition switch that switches depending on whether or not is on, a combination thereof, and the like can be applied. The switches SW1 and SW2 and the control unit 80U constitute a selection unit 80.

The control unit 80U allows, for example, a CPU (Central Processing Unit) 80a, a ROM (Read Only Memory) 80b, a RAM (Random Access Memory) 80c, an I / O (input / output) circuit 80d, and the like to input / output information to / from each other. Connected and configured. In the ROM 80b, a program 80p including an illumination control program for executing a process of switching illumination according to the information table T1 shown in FIG. 8 is written. Here, the “indirect illumination” is an illumination mode in which the light LT1 is irradiated from the first irradiation unit 50 to the surface 30a of the decoration unit 30 to generate a shadow S3 under the decoration member 20 on the surface 70a of the interior member 70. Means. “Direct illumination” means an illumination mode in which the second irradiation unit 60 irradiates the back surface 30b of the decoration unit 30 with the light LT2 to illuminate the bottom of the decoration member 20 on the front surface 70a of the interior member 70.

In the example of the table T1 shown in FIG. 8, when the switch SW1 is switched from OFF to ON, the control unit 80U turns on the light source 51 of the first irradiation unit 50 and turns off the light source 61 of the second irradiation unit 60. . When the switch SW1 is switched from on to off, the control unit 80U turns off the light source 51 of the first irradiation unit 50. When the switch SW2 is switched from OFF to ON, the control unit 80U turns on the light source 61 of the second irradiation unit 60 and turns off the light source 51 of the first irradiation unit 50. When the switch SW2 is switched from on to off, the control unit 80U turns off the light source 61 of the second irradiation unit 60.

Of course, the switching of illumination is not limited to the example shown in FIG. For example, the light source 51 is turned on when the switch SW1 is on without using the control unit 80U, and the light source 51 is turned off when the switch SW1 is off. The light source 61 is turned on when the switch SW2 is on. The light source 61 may be turned off when the switch SW2 is off.

Here, as shown in FIG. 3, FIG. 4A, FIG. 4B, etc., the direction of the optical axis AX0 when projected onto the general surface 31 of the decorative portion 30 is the projection plane optical axis direction D11, and the projection A distance from the light irradiation unit 40 in the surface optical axis direction D11 is a projection surface distance Z. 3 and 4 (a) and 4 (b), in the projection plane optical axis direction D11, the position P1 closest to the light irradiation unit 40 in the decoration unit 30 and the position farthest from the light irradiation unit 40. P2 is shown. The projection plane distance (Z _P2 ) at the farthest position P2 is larger than the projection plane distance (Z _P1 ) at the closest position P1.

FIG. 9A shows an example of the luminance L (Z) according to the projection plane distance Z on the surface 30a of the decorative unit 30 when the second irradiation unit 60 is turned off and the first irradiation unit 50 is turned on. Is schematically shown. FIG. 9B shows an example of the luminance L (Z) according to the projection plane distance Z on the surface 30a of the decorative portion 30 when the first irradiation unit 50 is turned off and the second irradiation unit 60 is turned on. Is schematically shown. FIG. 9C shows an example of the luminance L (Z) corresponding to the projection plane distance Z on the surface 30a of the decorative portion 30 when both the

irradiation portions

50 and 60 are turned off and ambient light is incident from the outside of the vehicle. Is schematically shown. 9A to 9C, the horizontal axis represents the projection plane distance Z, and the vertical axis represents the relative value Lr (Z) of the luminance L (Z). When the maximum value of the luminance L (Z) is Lmax (Z), the relative value Lr (Z) is L (Z) / Lmax (Z).

When one of the

irradiation units

50 and 60 is lit, a minimum value Lj is generated in the luminance L (Z) on the surface 30a of the decorative unit 30, and in many cases, a maximum value Li is generated. The minimum value Lj includes the minimum value caused by the shadows S1 and S2, and the maximum value Li includes the maximum value generated by the high luminance portions H1 and H2.
Here, the maximum value Li and the minimum value Lj appearing in the luminance L (Z) corresponding to the projection plane distance Z on the surface 30a of the decoration unit 30 when one of the

irradiation units

50 and 60 is lit are set to the projection plane distance Z. The maximum of the ratio Li / Lj between the local maximum value Li and the local minimum value Lj adjacent to each other when the values are arranged in this order is taken as the maximum ratio Ron during lighting. On the other hand, when the maximum value Li and the minimum value Lj occur in the luminance L (Z) on the surface 30a of the decorative portion 30 when both the

irradiation units

50 and 60 are turned off, the maximum value Li and the minimum value Lj are represented by the projection plane distance. The maximum of the ratio Li / Lj between the local maximum value Li and the local minimum value Lj adjacent to each other when arranged in the order of Z and having the local minimum value Lj as the denominator is defined as the maximum ratio Roff when extinguished. The lighting maximum ratio Ron is larger than the lighting maximum ratio Roff. The lighting maximum ratio Ron is preferably 1.5 or more.
Ambient light entering from the outside of the vehicle through the front window, side window, etc. has a variety of orientations including an angle (corresponding to θh1) formed by the direction D10 orthogonal to the general surface 31 between 0 ° and less than 45 °. Contains ingredients. Therefore, even if the maximum value Li and the minimum value Lj occur in the luminance L (Z) on the surface 30a of the decorative portion 30, the maximum ratio Roff during turn-off is normally about 1.25 at the maximum.

As shown in FIG. 9A, when the second irradiation unit 60 is turned off and the first irradiation unit 50 is turned on, the minimum value Lj = L1, the maximum value Li = Assume that L2 and the minimum value Lj = L3 (0 <L3 <L1 <L2) appear. The maximum value L2 is a maximum value generated in the high luminance portion H1 shown in FIG. 7A, and the minimum value L3 is a minimum value generated in the shadow S1 shown in FIG. In this case, the ratio L2 / L1 between the adjacent minimum value L1 and the maximum value L2 with the minimum value L1 as the denominator is the ratio L2 / L1 between the adjacent minimum value L3 and the maximum value L2 with the minimum value L3 as the denominator. It is smaller than L3. Therefore, the lighting maximum ratio Ron is L2 / L3.
As shown in FIG. 9B, when the first irradiation unit 50 is turned off and the second irradiation unit 60 is turned on, the minimum value L4 and the maximum value L5 (0 < Assume that L4 <L5) appears. The minimum value L4 is a minimum value generated in the shade S2 shown in FIG. 7B, and the maximum value L5 is a maximum value generated in the high luminance portion H2 shown in FIG. 7B. In this case, the ratio L5 / L4 between the adjacent local minimum value L4 and local maximum value L5 with the local minimum value L4 as the denominator is the lighting maximum ratio Ron.
As shown in FIG. 9 (c), when both

irradiation units

50 and 60 are extinguished, the minimum value Lj = L6, the maximum value Li = L7, and the minimum value Lj in order of increasing the projection plane distance Z. = L8 (0 <L8 <L6 <L7) appears. In this case, the ratio L7 / L6 between the adjacent minimum value L6 and the maximum value L7 with the minimum value L6 as the denominator is the ratio L7 / L6 between the adjacent minimum value L8 and the maximum value L7 with the minimum value L8 as the denominator. Smaller than L8. Therefore, the maximum ratio Roff when extinguishing is L7 / L8.

9A and 9B, the illuminating device 10 includes the uneven portion 35 formed on the surface 30 a of the decorative portion 30 by the light LT 0 from the light irradiating portion 40. The uneven portion 35 is formed on the decorative portion 30. As shown in FIG. 5, a minimum value Lj of the luminance L (Z) is generated, and in many cases, a maximum value Li is generated. As a result, even if the shape of the decorative portion 30 is limited as the interior of the automobile 1, a deep modeling is expressed by the shadow S0 in which the minimal value Lj of the luminance L (Z) is generated on the surface 30a of the decorative portion 30 when it is turned on. It becomes possible to do. Further, when the maximum value Li of the luminance L (Z) is also generated on the surface 30a of the decorative portion 30, a deeper modeling is preferably expressed as Ron ≧ 1.5.

Note that, in the projection plane optical axis direction D11, the total number of the convex portions 36 and the concave portions included in the concave and convex portion 35 is 2 or more, etc., so that there are more maximum values Li or more local minimum values Lj. May exist.

(4) Action and effect of lighting device:
Next, functions and effects of the lighting device 10 will be described.
When the second irradiation unit 60 is turned off and the first irradiation unit 50 is turned on, the optical axis AX1 is deviated from the direction D10 orthogonal to the general surface 31 of the decoration unit 30 as shown in FIG. Further, the light LT1 from the first irradiation unit 50 is irradiated onto the surface 30a of the decoration unit 30 from the vehicle compartment SP1 side. As a result, as shown in FIGS. 2B and 7A, a shadow S1 is generated on the surface 30a on the lower side starting from the convex portion 36, and the surface 30a on the upper side starting from the convex portion 36 is high. A luminance portion H1 is generated.

The interior parts of automobiles are limited in shape from the viewpoint of reducing the danger to passengers in the event of a collision, and sharp three-dimensional modeling cannot be used. Even if such a restriction is in the shape of the decorative portion 30, the luminance ratio of the shadow S1 and the high luminance portion H1 appearing on the surface 30a of the decorative portion 30 when the lamp is turned on is emphasized, and thereby a deep modeling is added to the vehicle compartment SP1. Expressed.
Moreover, since the shadow S3 due to the light LT1 from the first irradiation unit 50 being blocked by the decoration part 30 is generated below the decoration member 20 on the surface 70a of the interior member 70, the decoration part 30 is located with respect to the interior member 70. A three-dimensional effect that emerges is expressed in the passenger compartment SP1.

When the first irradiation unit 50 is turned off and the second irradiation unit 60 is turned on, the optical axis AX1 is deviated from the direction D10 orthogonal to the general surface 31 of the decoration unit 30 as shown in FIG. The light LT2 from the second irradiation part 60 is incident on the light guide layer 22 from the upper edge part 23 and irradiated on the back surface 30b of the decoration part 30. Since the decoration part 30 has diffuse transmission, the decoration part 30 is illuminated like a lantern, and the light LT2 irradiated on the back surface 30b of the decoration part 30 diffuses and exits to the vehicle compartment SP1 side. As a result, as shown in FIGS. 2C and 7B, a shadow S2 is generated on the surface 30a on the upper side starting from the convex portion 36, and the surface 30a on the lower side starting from the convex portion 36 is high. A luminance portion H2 is generated. For this reason, even if the shape of the decoration part 30 is restricted as the interior of the automobile 1, the luminance ratio of the shadow S2 and the high-intensity part H2 appearing on the surface 30a of the decoration part 30 during lighting is emphasized, and the first irradiation part 50 A model with depth is expressed in the vehicle compartment SP1 in a manner different from when the is turned on.
In addition, since the high-luminance portion H3 due to the emitted light LT2 from the lower edge portion 24 of the light guide layer 22 is generated below the decorating member 20 on the surface 70a of the interior member 70, the present lighting device 10 includes the surface of the interior member 70. A deep modeling can be expressed in the passenger compartment SP1 while illuminating 70a.

Here, the positional relationship between the shadow S2 by the second irradiation unit 60 and the high luminance portion H2 is opposite to the positional relationship between the shadow S1 by the first irradiation unit 50 and the high luminance portion H1. Thereby, when the second irradiation unit 60 is turned on, the convex portion 36 appears to be recessed, and when the irradiation unit 42 to be turned on is switched between the first irradiation unit 50 and the second irradiation unit 60, the surface 30 a of the decoration unit 30 is expressed. The uneven shape appears to flip like a trick art. Therefore, when the irradiation unit 42 that irradiates the decoration unit 30 with the light LT0 is switched between the first irradiation unit 50 and the second irradiation unit 60, an effect such as trick art is expressed. Moreover, since this illuminating device 10 can switch between "indirect illumination" and "direct illumination", design property and presentation property are improved.
As explained above, this technology uses the shadow effect as an expression, and while maintaining the restrictions on the shape as an automobile interior part, especially at night, a deeply carved and sharply shaped design, an unprecedented design, And the illuminating device which can express an effect can be provided.

(5) Modification:
In addition, various modifications can be considered for the present technology.
An automotive interior lighting device to which the present technology can be applied will be described with reference to FIG. 1 and can also be applied to lighting devices 10B to 10F other than the lighting device 10A for the door trim 4a. In the decorative portion of the present technology, it is preferable that the distance between the positions P1 and P2 shown in FIG. 3 and the like is relatively small because it is easy to control the position where the shadow appears, but it is suitable for an interior material having a relatively large area such as the roof trim 6a. It is also possible to install. For example, when the lighting device of the present technology is installed on the roof trim 6a, the above-described shadow effect is exhibited even when the curvature radius is 50 mm or more, and the impact of the shadow at the time of lighting is not lit in terms of the difference in appearance between day and night It can be given larger than time.

FIGS. 10A and 10B schematically show a shadow S0 that occurs when there is an uneven portion 35 having a recessed portion 37 that is recessed to the opposite side to the passenger compartment SP1.
As shown in FIG. 10A, when the first irradiation unit 50 irradiates the surface 30a of the decorative portion 30 with the light LT1 from the upper side of the concave portion 37, a shadow S1 is formed on the surface 30a on the upper side from the concave portion 37. As a result, a high-intensity portion H1 is generated on the surface 30a on the lower side starting from the concave portion 37. The positional relationship between the shadow S1 due to the concave portion 37 and the high luminance portion H1 is opposite to the positional relationship between the shadow S1 due to the convex portion 36 and the high luminance portion H1. Also in this case, a model with depth when illuminated is expressed in the vehicle compartment SP1 within the constraints of the shape. Moreover, since the decorating member 20 is arrange | positioned from the interior member 70 to vehicle interior SP1 side, the shadow S3 by the light LT1 from the 1st irradiation part 50 being interrupted by the decoration part 30 is in the surface 70a of the interior member 70. It occurs under the decorative member 20. Therefore, a three-dimensional effect that the decorative portion 30 is raised with respect to the interior member 70 is expressed in the vehicle compartment SP1.

As shown in FIG. 10B, the light LT2 is incident on the light guide layer 22 from the upper edge portion 23 of the light guide layer 22 and irradiated on the back surface 30b of the diffusely transmissive decorative portion 30, whereby the decoration portion 30 is obtained. Is lit like a lantern. Further, a shadow S2 is generated on the surface 30a on the lower side starting from the concave portion 37, and a high-luminance portion H2 is generated on the surface 30a on the upper side starting from the concave portion 37. The positional relationship between the shadow S2 by the second irradiation unit 60 and the high luminance part H2 is opposite to the positional relationship between the shadow S1 by the first irradiation unit 50 and the high luminance part H1. Thus, since the luminance distribution of the decoration part 30 by the light LT2 from the second irradiation unit 60 is different from the luminance distribution by the light LT1 from the first irradiation unit 50, the first irradiation unit 50 is turned on when the second irradiation unit 60 is turned on. An effect different from the lighting state of is expressed. Also in this case, a model with depth when illuminated is expressed in the vehicle compartment SP1 within the constraints of the shape. Furthermore, since the light LT2 incident on the upper edge portion 23 of the light guide layer 22 from the second irradiation unit 60 is emitted from the lower edge portion 24 of the light guide layer 22, the high luminance portion H3 due to the emitted light is reflected on the interior member 70. It occurs below the decorative member 20 on the surface 70a. Therefore, the lighting device 10 of the present modification can also express a model with depth in the passenger compartment SP1 while illuminating the surface 70a of the interior member 70.

11 (a) and 11 (b) schematically show the shadow S0 that occurs when the uneven portion 35 having both the convex portion 36 and the concave portion 37 is present. As shown in FIG. 11A, when the first irradiation unit 50 irradiates the surface 30a of the decorative portion 30 from the upper side of the concave and convex portion 35, the lower side starting from the convex portion 36 and the concave portion 37. A shadow S1 is generated on the surface 30a on the upper side starting from, and a high-luminance portion H1 is generated on the surface 30a on the upper side starting from the convex portion 36 and on the lower side starting from the concave portion 37. As shown in FIG. 11B, when the light LT2 is incident on the light guide layer 22 from the upper edge portion 23 of the light guide layer 22 and is irradiated on the back surface 30b of the diffusely transmissive decorative portion 30, the convex portion 36 is formed. A shadow S1 is generated on the surface 30a on the upper side starting from the starting point and the lower side starting from the concave part 37, and a high brightness portion is formed on the surface 30a on the lower side starting from the convex part 36 and on the upper side starting from the concave part 37. H1 occurs on the surface 30a. Therefore, a complicated modeling that is deep when the lamp is turned on within the shape restriction is expressed in the passenger compartment SP1.

FIG. 12 shows a modification in which the function of the light guide 62 of the second irradiation unit 60 shown in FIG. 6 is applied to the light guide layer 22 of the decorative member 20. It can be said that the illuminating device 10 shown in FIG. 12 has integrated the light guide layer 22 and the light guide 62 shown in FIG. The light guide layer 22 shown in FIG. 12 includes a light guide part 62A having a reflective surface 62b. An end surface 62c in the longitudinal direction D1 of the light guide body 62A is a portion on which the light LT2 from the light source 61 is incident, and is an incident surface having regular transmittance. A plurality of concave portions 63 for reflecting the light LT2 incident from the end surface 62c toward the decorative portion 30 are formed in the reflective surface 62b with an interval in the longitudinal direction D1. The light LT2 from the light source 61 enters the light guide body 62A from the end face 62c, is reflected by the concave portion 63, and is irradiated from the light guide layer 22 to the back surface 30b of the diffusely transmissive decorative portion 30. As a result, the decorative portion 30 is illuminated like a lantern, and a shadow S2 and a high-intensity portion H2 corresponding to the shape of the concavo-convex portion 35 are generated on the surface 30a, and the light LT2 emitted from the lower edge portion 24 of the light guide layer 22 A high-intensity portion H3 is generated below the decorating member 20 on the surface 70a of the interior member 70. Therefore, the lighting device 10 of the present modification can also express a model with depth in the passenger compartment SP1 while illuminating the surface 70a of the interior member 70.

Fig.13 (a) has shown the compartment SP1 side of the side door trim 4a to which the illuminating device 10 provided with another decorating member 120 was attached. In addition, the decorating member 120 is included in the concept of the decorating member 20 mentioned above. FIG. 13B shows a state in which the light LT0 from the light irradiation unit 40 is applied to the decoration unit 30. FIG. 14 schematically shows a vertical end surface when the lighting device 10 including the decorating member 120 is cut at a position corresponding to A2 in FIG. The illuminating device 10 of this specific example does not have the second irradiation unit, and includes the first irradiation unit 50 that irradiates the light LT1 on the surface 30a of the decoration unit 30 from the passenger compartment SP1 side as the light irradiation unit 40. As shown in FIG. 6, the first irradiation unit 50 irradiates the decoration unit 30 with the light LT 1 from the light source 51 through the long light guide 52. The optical axis AX1 of the light LT1 is deviated from a direction D10 orthogonal to the general surface 31 of the decorative portion 30.
The concave portion 53 of the light guide 52 may be a line-shaped groove having a triangular cross section, but in order to suppress reflection of the shape of the concave portion, a fine dot pattern having a diameter of about 50 to 500 μm by laser processing is formed. preferable.

The decoration member 120 includes a decoration part 30 that is irradiated with the light LT1 from the first irradiation part 50, and an auxiliary part 125 that is not irradiated with the light LT1. The decoration part 30 stands up from the boundary part 126 with the auxiliary part 125 to the opposite side (vehicle exterior) from the vehicle compartment SP1. The inclination of the decoration part 30 from the vertical direction is steeper than the inclination of the optical axis AX1 from the vertical direction. The auxiliary part 125 extends substantially downward from the boundary part 126 with the decorative part 30.

As described above, the surface 30a of the decorative portion 30 is irradiated with the light LT1 from the first irradiation portion 50, while the auxiliary portion 125 is not irradiated with the light LT1 and a shadow S4 is generated. If there is no light irradiation part, it is difficult to see the decoration part at night, and there is a possibility that the luxury feeling of the passenger compartment will be lower than in the daytime. Such a decrease in luxury is not easy to suppress even if the color of the passenger compartment or the skin of the interior material is changed. By having the 1st irradiation part 50 in the illuminating device 10, it becomes easy to see the decoration part 30 also at night, and the high-class feeling of vehicle interior SP1 is produced. In addition, since the decoration member 120 includes the boundary portion 126 that is convex toward the vehicle compartment SP1 by the decoration portion 30 and the auxiliary portion 125, the shadow portion is expressed and the decoration portion 30 that is irradiated with the light LT1 is emphasized. Is done. Thereby, different shaping is realized in the vehicle compartment SP1 day and night, and sharp shaping is realized in the vehicle compartment SP1 when it is turned on.

On the surface 30a of the decorative part 30, a fine uneven part 35 such as "texture" is formed in order to emphasize the "material feeling" of the decorative part. The uneven portion 35 has a plurality of fine convex portions 36 and a plurality of fine concave portions 37. The general surface 31 of the decorative portion 30 of this specific example also means a surface when it is assumed that there is no uneven portion 35. The direction D10 orthogonal to the general surface 31 is a direction orthogonal to the plane representing the average inclination of the general surface 31, and is a direction orthogonal to the plane passing through the uppermost point P1 and the lowermost point P2 (boundary portion 126). . When the light LT1 whose optical axis AX1 is shifted from the direction D10 orthogonal to the general surface 31 is irradiated to the surface 30a of the decorative portion 30, the lower side and the fine concave portion 37 starting from the fine convex portion 36 are formed. A shadow S1 is generated on the surface 30a on the upper side starting from the starting point, and a high-luminance portion H1 is generated on the surface 30a on the upper side starting from the fine convex portion 36 and on the lower side starting from the fine concave portion 37.

If there is no light irradiation part, the shading effect of the fine uneven part of the decoration part is manifested only by sunlight entering from the window. Since the illumination device 10 includes the first irradiation unit 50, the brightness ratio of the shadow S1 and the high-intensity portion H1 appearing on the surface 30a of the decoration unit 30 when the lighting device 10 is turned on is emphasized. A shadow effect of 35 is expressed, and the “material feeling” of the decoration part is emphasized. Thereby, modeling with depth is expressed by vehicle interior SP1.

In addition, in order to suppress the reflection of a light source, the surface of the decorating member 120 is preferably a low gloss or matte surface.
Moreover, the 1st irradiation part 50 may irradiate the decoration part 30 directly with the light LT1 from the light source 51, as shown in FIG.

FIG. 15 schematically illustrates an example of a vertical end surface when the lighting device 10 including another decorative member 220 is cut at a position corresponding to A1 in FIG. In addition, the decorating member 220 is included in the concept of the decorating member 20 mentioned above. FIG. 16A schematically shows a state in which the light LT1 is applied from the first irradiation unit 50 to the surface 30a of the decoration unit 30 of the decoration member 220. FIG. FIG. 16B schematically shows a state in which the light LT2 is irradiated from the second irradiation unit 60 to the back surface 30b of the decoration unit 30 of the decoration member 220. In FIG. 15 and FIGS. 16A and 16B, hatching indicating a cross section of the decorative member 220 is omitted for easy understanding.

15 etc. has the light guide layer 22 (example of a light guide) in which the decoration part 30 was laminated | stacked on the opposite side to vehicle interior SP1. The decorative member 220 has the decorative portion 30 on the back surface 20b, and the light guide layer 22 is on the interior side SP1 of the decorative portion 30. Although the decorating member 220 is fixed to the interior member 70 and the cover portion 75 by a holder (not shown), it may be fixed by an adhesive or the like, or may be fixed to the interior member 70 without being fixed to the cover portion 75. It may be fixed, or may be fixed to the cover 75 without being fixed to the interior member 70. The interior member 70 and the cover portion 75 are substantially the same as the above-described example, and thus detailed description thereof is omitted. Moreover, since each element of the light irradiation part 40 is substantially the same as the example mentioned above, detailed description is abbreviate | omitted. The

light sources

51 and 61 may be arranged to directly irradiate the decoration part 30 with the light LT1 and LT2 as shown in FIG. 15, or the light LT1 and LT2 via the light guides 52 and 62 shown in FIG. May be arranged.

15 and the like, the front surface 30a of the decorative portion 30 is covered with the light guide layer 22, and the back surface 30b of the decorative portion 30 faces the interior member 70 through the air layer. That is, also in this example, the surface 30a of the decorative part means a surface facing the room, and the back surface 30b of the decorative part means a surface facing the opposite side to the room. The decoration part 30 shown in FIG. 15 is a part facing the room (vehicle room SP1) within a range that is normally visible from the room (car room SP1) in the decorating member 220. When there is the light-shielding cover portion 75, the decorative member 220 is not covered with the cover portion 75 and is a portion facing the room (vehicle compartment SP1). The decoration part 30 of the decoration member 220 shown in FIG. 15 becomes a site | part from the highest point P1 to the lowest point P2. The general surface 31 of the decorative portion 30 also means a surface when it is assumed that the surface 30a of the decorative portion 30 does not have the uneven portion 35 that causes the shadow S0, and may be a curved surface with a gentle curvature radius described in the above-described example. . The direction D10 orthogonal to the general surface 31 is also the direction described in the above example.

The decorative member 220 is arranged with the planar decorative portion 30 facing away from the vehicle compartment SP1 and the longitudinal direction D1 facing the substantially front-rear direction D2. The upper edge portion 23 of the light guide layer 22 is a portion on which the light LT1 from the first irradiation unit 50 is incident, and is an incident surface having regular transmittance so that reflection and diffusion are suppressed. The lower edge portion 24 of the light guide layer 22 is a portion from which the light LT1 incident from the upper edge portion 23 is emitted, and is an emission surface having regular transparency so that reflection and diffusion are suppressed. For the light guide layer 22, the molded product described in the above-described example can be used, and the material described in the above-described example can also be used as the transparent material for the molded product.

The decorative portion 30 of the decorating member 220 has diffuse reflectivity with respect to light from the passenger compartment SP1 through the light guide layer 22, and diffuse diffuseness with respect to light from the side opposite to the passenger compartment SP1. Have. As described in the above-described example, the decorative portion 30 also has a mud state in which both the transmitted light and the reflected light have a less regular reflection component such that both the transmitted light and the reflected light become light rays having a lambert-like angular intensity distribution (nondirectionality). preferable. The material demonstrated in the example mentioned above can be used also for the decoration part 30 of the decorating member 220. Of course, the light guide layer 22 in which the rough surface shape is formed on the back surface of the light guide to be the light guide layer 22 and the decorative portion 30 is laminated on the opposite side to the room may be formed. This rough surface shape can also be formed as described in the above example.

When the light LT1 from the first irradiation unit 50 is irradiated onto the surface 30a of the decoration part 30 through the light guide layer 22, as shown in FIG. 30a. When the light LT2 from the second irradiation unit 60 is irradiated onto the back surface 30b of the decoration part 30 through the air layer, as shown in FIG. 16B, a shadow S2 due to the uneven part 35 is applied to the surface 30a of the decoration part. It is formed. The uneven portion 35 in the decorating member 220 also has a convex portion 36 that is convex toward the passenger compartment SP1 side. Although the radius of curvature of the convex portion 36 can be made smaller than the radius of curvature when the decorative portion is arranged on the indoor side of the light guide layer, the thickness of the light guide layer 22 is limited as an automobile interior part. However, from the necessity of maintaining the durability of the decorative member 220, it cannot be made extremely small.

The lighting device 10 in the case where the light guide layer 22 is disposed on the indoor side of the decoration unit 30 can also obtain the operations and effects described in the above-described example.
When the second irradiation unit 60 is turned off and the first irradiation unit 50 is turned on, the optical axis AX1 is deviated from the direction D10 orthogonal to the general surface 31 of the decoration unit 30 as shown in FIG. The light LT1 from the first irradiation unit 50 passes through the light guide layer 22 and is irradiated from the vehicle compartment SP1 side to the surface 30a of the diffuse reflection decorative portion 30. As a result, as shown in FIG. 2B, a shadow S1 is generated on the surface 30a on the lower side from the convex portion 36, and a high-luminance portion H1 is generated on the surface 30a on the upper side from the convex portion 36. . In addition, since the shadow S3 due to the light LT1 being blocked by the decorative portion 30 is generated below the decorative member 20 on the surface 70a of the interior member 70, the three-dimensional appearance that the decorative portion 30 is raised with respect to the interior member 70. The effect is expressed in the passenger compartment SP1.

When the first irradiation unit 50 is turned off and the second irradiation unit 60 is turned on, the optical axis AX1 is deviated from the direction D10 orthogonal to the general surface 31 of the decoration unit 30 as shown in FIG. The light LT2 from the second irradiation part 60 enters the light guide layer 22 from the upper edge part 23 and is applied to the back surface 30b of the diffusely transmissive decorative part 30. As a result, the decoration part 30 is illuminated like a lantern, and the light LT2 irradiated on the back surface 30b of the decoration part diffuses and exits to the passenger compartment SP1 side, as shown in FIG. 2 (c). A shadow S2 is generated on the surface 30a on the upper side starting from the portion 36, and a high-intensity portion H2 is generated on the surface 30a on the lower side starting from the convex portion 36. Moreover, since the high-intensity part H3 by the light LT2 passing through the air layer behind the decorating member 220 is generated below the decorating member 20 on the surface 70a of the interior member 70, the present lighting device 10 includes the surface 70a of the interior member 70. A deep modeling can be expressed in the passenger compartment SP1.

Further, when the irradiation unit 42 that irradiates the decoration unit 30 with the light LT0 is switched between the first irradiation unit 50 and the second irradiation unit 60, an effect such as trick art is expressed, and “indirect illumination” and “direct illumination” ”Is switched, and the design and production are improved. Therefore, even when the light guide layer 22 is arranged on the indoor side of the decorative portion 30, an unprecedented design that is deeply carved and sharply shaped, especially at night, while keeping the restrictions on the shape as an automobile interior part It is possible to provide an illuminating device that can express characteristics and effects.

Even when the light guide layer is arranged on the indoor side of the decorative portion, the concave and convex portion 35 has a concave portion 37 that is recessed to the opposite side to the vehicle compartment SP1 as shown in FIGS. 10 (a) and 10 (b). Alternatively, as shown in FIGS. 11A and 11B, the concavo-convex portion 35 may have both the convex portion 36 and the concave portion 37. Moreover, it is also possible to provide the light guide layer 22 of the decorating member 220 with the function of the light guide 52 of the first irradiation unit 50 shown in FIG.

In addition, in all the examples described above, the basic effect of the present technology can be obtained even if the uneven portion 35 includes a protruded portion having a curvature radius of less than 3.5 mm.
In all the examples described above, the basic effect of the present technology can be obtained even if only one of the first irradiation unit 50 and the second irradiation unit 60 is provided.

(6) Conclusion:
As described above, according to the present invention, according to various aspects, it is possible to provide a technology such as an automotive interior lighting device that can express a model having a depth when lighting in a room within a shape restriction. Needless to say, the above-described basic actions and effects can be obtained even with a technique that does not have the constituent elements according to the dependent claims but includes only the constituent elements according to the independent claims.
In addition, the configurations disclosed in the embodiments and modifications described above are mutually replaced, the combinations are changed, the known technology, and the configurations disclosed in the embodiments and modifications described above are mutually connected. It is possible to implement a configuration in which replacement or combination is changed. The present invention includes these configurations and the like.

1 ... car, 2 ... body panel,
3 ... interior material for front part, 3a ... interior material for instrument panel,
4 ... Interior material for side part, 4a ... Door trim,
4b ... Pillar garnish, 4c ... Deck side trim,
5 ... Interior material for rear part, 5a ... Rear door trim,
6 ... Interior material for ceiling, 6a ... Roof trim,
10 ... lighting device,
20, 120, 220 ... decorative member, 22 ... light guide layer, 23, 24 ... edge, 25 ... end,
28 ... Holder, 28b ... Back, 28c ... Upper edge, 28d ... Recess,
28e ... boss, 28f ... extension part, 28g ... insertion hole,
30 ... decoration part, 30a ... front surface, 30b ... back surface,
31 ... General aspect,
35 ... Uneven portion, 36 ... convex portion, 37 ... concave portion,
40 ... light irradiation part, 42 ... irradiation part,
50 ... 1st irradiation part, 51 ... Light source, 52 ... Light guide, 53 ... Recessed part,
60 ... second irradiation unit, 61 ... light source, 62 ... light guide, 63 ... concave,
70 ... interior member, 70a ... surface, 70c ... insertion hole,
71 ... armrest, 72 ... pocket,
75 ... Cover part, 75b ... Back side, 76 ... Boss, 76b ... Base part,
80 ... selection part,
125 ... Auxiliary part, 126 ... Boundary part,
AX0, AX1, AX2 ... optical axis,
D1 ... longitudinal direction, D2 ... front-rear direction, D3 ... vertical direction, D4 ... width direction,
D10 ... direction orthogonal to the general plane,
D11: Projection plane optical axis direction,
LT0, LT1, LT2 ... light,
S0, S1, S2, S3, S4 ... shadows,
SP1 ... Vehicle compartment (car interior), SP2 ... Cargo compartment (car interior),
Z: Projection plane distance,
L (Z): Luminance, Li: Maximum value, Lj: Minimum value,
Ron: Maximum ratio when lit.

Claims

A decorative member having a decorative portion visible from the interior of the automobile;
A light irradiating unit that irradiates light on the decorative part, the optical axis being shifted from a direction orthogonal to the general surface of the decorative part,
The automotive interior lighting device, wherein the decorative portion has a concavo-convex portion in which a shadow is generated on a surface of the decorative portion by light from the light irradiation portion.
A decorative member having a decorative portion visible from the interior of the automobile;
A light irradiating unit that irradiates light on the surface of the decorative unit, the optical axis being shifted from a direction perpendicular to the general surface of the decorative unit, and
The automotive interior lighting device, wherein the decorative portion has a concavo-convex portion in which a shadow is generated on a surface of the decorative portion by light from the light irradiation portion.
An interior member having the decorative member disposed on the indoor side;
The automotive interior lighting device according to claim 2, wherein a shadow caused by light from the light irradiating unit being blocked by the decorative unit is generated on a surface of the interior member.
The light irradiating unit is a first irradiating unit that irradiates light on the surface of the decorative unit, and the first irradiating unit whose optical axis is shifted from a direction orthogonal to the general surface of the decorative unit is opposite to the room. A second irradiating unit that irradiates light from the side to the back surface of the decorative unit, the second irradiating unit having an optical axis shifted from a direction perpendicular to the general surface of the decorative unit, and a plurality of irradiating units ,
The automotive interior lighting device according to any one of claims 1 to 3, further comprising a selection unit that selects an irradiation unit that irradiates the decoration unit with light from the plurality of irradiation units.
A decorative member having a diffused permeability and having a decorative portion visible from the interior of the automobile;
A light irradiating unit that irradiates light from the opposite side of the room to the back surface of the decorative unit, and a light irradiating unit whose optical axis is shifted from a direction perpendicular to the general surface of the decorative unit, and
The automotive interior lighting device, wherein the decorative portion has a concavo-convex portion in which a shadow is generated on a surface of the decorative portion by light from the light irradiation portion.
The automotive interior lighting device according to any one of claims 1 to 5, wherein the decorative member includes a light guide disposed on the indoor side of the decorative portion.
The concavo-convex portion has a convex portion that is convex toward the indoor side,
The automotive interior lighting device according to any one of claims 1 to 6, wherein a radius of curvature of the convex portion is 3.5 mm or more.
A decorative member having a decorative portion visible from the interior of the automobile;
A light irradiating unit that irradiates light on the decorative part, the optical axis being shifted from a direction orthogonal to the general surface of the decorative part,
The direction of the optical axis when projected on the general surface of the decorative portion is the projection surface optical axis direction,
The distance from the light irradiator in the direction of the projection surface optical axis is the projection surface distance,
When the maximum value and the minimum value appearing in the luminance according to the projection plane distance on the surface of the decoration portion when the light irradiation unit is turned on are arranged in order of the projection plane distance, the adjacent maximum value and minimum value are An automotive interior lighting device in which the maximum ratio with the local minimum value of denominator is 1.5 or more.
The automotive interior lighting device according to claim 2 or 3, wherein the decoration member further includes an auxiliary portion that is visible from the room and is not irradiated with light from the light irradiation portion.