CN113767031B

CN113767031B - Lighting device for vehicle

Info

Publication number: CN113767031B
Application number: CN202080030610.XA
Authority: CN
Inventors: 小岛铁温; 松尾宏隆
Original assignee: Hayashi Telempu Corp
Current assignee: Hayashi Telempu Corp
Priority date: 2019-06-05
Filing date: 2020-05-21
Publication date: 2024-03-22
Anticipated expiration: 2040-05-21
Also published as: JPWO2020246257A1; JP7367017B2; CN113767031A; WO2020246257A1

Abstract

A vehicle lighting device (1) for projecting light onto an interior component of a vehicle is provided with a light-emitting unit (100) and a decorative member (3) that covers the light-emitting unit (100). The light emitting unit (100) has at least one light source (5), an output control unit (7) that controls the output of the light source (5), a rod-shaped light guide (4) that guides light emitted from the light source (5), and a housing (2) that houses the light guide (4). A light shielding part (2 a) and a plurality of light transmitting parts (2 b) which are arranged along the light guide body (4) in a separated way are arranged on the shell (2). The light transmitted through the light-transmitting part (2 b) is projected to the interior member.

Description

Lighting device for vehicle

RELATED APPLICATIONS

This application claims priority from japanese patent application publication No. 2019-105275, filed on 6/5 in 2019, which is incorporated by reference as part of the present application in its entirety.

Technical Field

The present invention relates to a vehicle lighting device, and more particularly, to a lighting device capable of improving the designability of interior lighting by projecting light to interior components of a vehicle.

Background

Conventionally, various lighting devices have been provided in the interior of a vehicle such as an automobile in order to improve the design of the interior of the vehicle. As such interior lighting, there has been proposed a lighting device that allows light from a light source to enter a light guide body and allows a rider to visually confirm the light emitted from the light guide body directly or indirectly.

For example, patent document 1 proposes an illumination device as follows: light sources whose wavelength regions partially overlap are arranged at both ends of the elongated light guide, and by controlling the outputs of the light sources independently, smooth light flow can be exhibited.

Patent document 2 proposes an in-vehicle interior lighting device that includes light sources having different emission colors, which are arranged at both ends of an elongated light guide, a control unit that controls the lighting of the light sources, and an irradiation unit that irradiates the light of the light guide to the inside of the vehicle interior, wherein the control unit increases the amount of light emitted from the 1 st light source and decreases the amount of light emitted from the 2 nd light source, so that the irradiation unit emits light so that the light is seen to flow.

The light guide is also applied to illumination of a roof portion of a vehicle. Patent document 3 discloses an interior component with indirect lighting, and as an embodiment, the following structure is described: along the mounting groove of the top surface built-in component, a plurality of light guide bodies, a light source arranged opposite to the end surface of the light guide bodies, and a light diffusion plate covering the light source and bridging between the adjacent light guide bodies are arranged, and light is irradiated to the appearance surface of the top surface component.

Prior art literature

Patent literature

Patent document 1: japanese patent No. 5602616 specification

Patent document 2: japanese patent No. 5721020 specification

Patent document 3: japanese patent No. 4398452 specification

Disclosure of Invention

Problems to be solved by the invention

In the field of the automobile related industry, in the technology of patent document 3, which aims to further improve the design of the interior of the vehicle in order to improve the comfort of the occupant, a plurality of light guides are arranged in series, and indirect illumination is uniformly provided in a wide area, but the light emission amount is not controlled. In the techniques of patent documents 1 and 2, the light flow is expressed by the elongated light guide by the control of the light source, but the pattern control of the light emission shape and the like are not performed. For example, patent document 2 describes that a 1 st light source arranged at one end of a light guide and a 2 nd light source arranged at the other end can use light sources that emit light of different chromaticity, but does not describe that illumination patterns are formed using illumination light of different colors.

The purpose of the present invention is to provide illumination with excellent design by controlling the light emission shape in addition to the light output from a light source when illuminating an interior component of a vehicle using an elongated light guide.

Means for solving the problems

The lighting device for a vehicle according to the present invention is a lighting device for projecting light to an interior component of a vehicle, the lighting device including a light emitting unit and a garnish covering the light emitting unit, the light emitting unit including: at least one light source; an output control unit that controls an output of the light source; a rod-shaped light guide body that guides light emitted from the light source; and a case that houses the light guide body, wherein a light shielding portion and a plurality of light transmitting portions arranged along the light guide body in a separated manner are provided on the case, and light transmitted through the light transmitting portions is projected to the interior member.

According to the vehicle lighting device of the above configuration, the light pattern of the light projected to the interior member as indirect illumination can be designed by the configuration in which the light is projected from the light transmitting portion arranged separately along the long light guide body. Therefore, high design can be imparted to the illumination in the vehicle interior.

In the above-described vehicle lighting device, the light emitting unit may include a plurality of light sources having different emission colors and a plurality of light guides for guiding light from the light sources having the respective emission colors, and the output control unit may independently control the output of the respective light sources.

According to the above-described illumination device for a vehicle, by emitting light of two or more different colors simultaneously and/or with a change in time, it is possible to visually confirm a pattern in which the light of different colors crosses, a state in which the color and direction of bright illumination light change, and a degree of freedom in design of the illumination device is large.

In the above-described vehicle lighting device, the output control unit may control the intensity of the light emitted from the light source to vary with time.

According to the vehicle lighting device having the above configuration, the intensity of the projected light is controlled to be variable with time, so that the pattern and the color of the illumination can be changed with time, and a highly designed illumination effect can be achieved.

In the above-described vehicle lighting device, the vehicle lighting device may be fixed to a roof of the vehicle, and the light transmitted through the light transmitting portion may be projected toward the headliner from a gap between the headliner, which is the interior member, and the garnish.

According to the vehicle lighting device having the above configuration, the light-emitting portion is held between the headliner and the garnish and is emitted from the gap between the headliner and the garnish, whereby an indirect lighting effect with high design can be obtained.

In the above-described vehicle lighting device, the light transmitting portion may be formed by a slit provided in the case made of a light-shielding member.

In the above-described vehicle lighting device, an optical pattern including a plurality of grooves may be formed on a reflecting surface of the light guide body on the opposite side of the light transmitting portion.

In the above-described vehicle lighting device, the output control unit may be disposed inside the garnish.

Any combination of at least 2 structures disclosed in the claims and/or specification and/or drawings is encompassed by the present invention. In particular, any combination of more than 2 of the claims is included in the present invention.

Drawings

The present invention will be more clearly understood from the following description of the preferred embodiments with reference to the accompanying drawings. However, the embodiments and drawings are for illustration and description only and are not intended to be used to determine the scope of the invention. The scope of the invention is determined by the appended claims. In the drawings, like reference numerals designate identical or corresponding parts throughout the several views.

Fig. 1A is a front view showing an appearance of the lighting device for a vehicle of the present invention.

Fig. 1B is a schematic front view of a partially enlarged view enclosed by a broken line B of fig. 1A.

Fig. 2 is a sectional view taken along line II-II of fig. 1B.

Fig. 3A is a cross-sectional view taken along line III-III of fig. 1B.

Fig. 3B is a cross-sectional view of a modified vehicular illumination device.

Fig. 3C is a cross-sectional view of a lighting device for a vehicle according to another modification.

Fig. 4 is a partially cut-away perspective view showing a state in which the vehicle lighting device is fixed to the bracket via the headliner.

Fig. 5 is an enlarged view of a portion surrounded by a line V of fig. 2.

Fig. 6 is a perspective view showing an example of an optical pattern of a light guide used in the lighting device for a vehicle of the present invention.

Fig. 7A is a diagram for explaining an example of the arrangement of a light source and a light guide in the lighting device of the present invention.

Fig. 7B is a view for explaining another example of the arrangement of the light source and the light guide in the lighting device of the present invention.

Fig. 7C is a view for explaining still another example of the arrangement of the light source and the light guide in the lighting device of the present invention.

Fig. 7D is a view for explaining still another example of the arrangement of the light source and the light guide in the lighting device of the present invention.

Fig. 7E is a view for explaining still another example of the arrangement of the light source and the light guide in the lighting device of the present invention.

Fig. 7F is a view for explaining still another example of the arrangement of the light source and the light guide in the lighting device of the present invention.

Fig. 8 is a diagram for explaining a configuration of an output control unit included in the vehicle lighting device.

Fig. 9 is a conceptual diagram showing a state in which the vehicle lighting device of the present invention is installed on the roof of an automobile and is lighted.

Fig. 10A is a view illustrating an illumination pattern in the case where light sources are provided at both ends of a light guide in the illumination device for a vehicle of the present invention.

Fig. 10B is a view illustrating an illumination pattern in the case where light sources are provided at both ends of two rows of light guides in the illumination device for a vehicle of the present invention.

Fig. 11 is an enlarged view of a portion surrounded by a line X of fig. 10B.

Fig. 12 is a diagram schematically showing a case where the color and the light emitting direction of illumination light with bright brightness change with time when two rows of light guides are illuminated with light sources with different emission colors.

Fig. 13 is a diagram schematically showing the temporal change of illumination light in the case of illumination using a conventional illumination device.

Detailed Description

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the figure, the Z direction indicated by an arrow indicates the upper direction, the X direction indicates the vehicle front direction, and the Y direction indicates the vehicle interior direction in the vehicle width direction.

As shown in fig. 1A, a lighting device 1 for a vehicle according to an embodiment of the present invention is a long article. As shown in fig. 1B as an enlarged view, the vehicular illumination device 1 includes a housing 2 accommodating a light guide (not shown) and a decorative member (decorative member) 3 covering the housing 2. The case 2 is provided with a light shielding portion 2a and a light transmitting portion 2b separated in the longitudinal direction. The housing 2 is provided with a plurality of locking portions 2c for providing the vehicle lighting device 1 to an interior trim (not shown).

As shown in fig. 2, a plurality of light guides 4 (3 light guides 41, 42, 43 in the drawing) are arranged in parallel in the housing 2, and light sources 5 (3 light sources 51, 52, 53 in the drawing) are arranged to face the respective end surfaces. The light source 5 is connected to an output control unit 7 via a harness 6. The housing 2, the light guide 4, the light source 5, and the output control unit 7 constitute a light emitting unit 100. Here, the output control unit 7 is shown on the inside of the garnish 3 for the sake of explanation, but the output control unit 7 may be provided on the outside of the garnish 3.

Light emitted from the light source 5 and entering the light guide 4 is guided while being reflected by the back surface 4a and the front surface 4b of the light guide. As shown in fig. 6 described later, the back surface 4a is provided with an optical pattern 4c such as a prism-shaped groove, and light incident at a shallow angle with respect to the back surface 4a is reflected at a large angle by reflection of light within the optical pattern 4c, so that the light can be emitted from the front surface 4 b.

Fig. 2 shows an example of an optical path when light emitted from the light source 5 is guided by the light guide 4 and emitted from the light transmitting portion 2b provided in the housing 2. The optical paths of the light incident from the 1 st light source 51 and guided by the 1 st light guide 41 are indicated by solid lines L1, L2, and L3. An example of the optical path of the light incident from the 2 nd light source 52 and guided by the 2 nd light guide 42 is shown by a broken line L4. An example of the optical path of the light incident from the 3 rd light source 53 and guided by the 3 rd light guide is shown by a broken line L5.

In the optical path L1, the light emitted from the 1 st light source 51 is guided by the 1 st light guide 41, and after being emitted, is shielded by the light shielding portion 2a, but the light of the optical paths L2, L3 is transmitted through the light transmitting portion 2b. In the optical path L4, the light guided by the 2 nd light guide 42 and emitted is transmitted through the 1 st light guide and then transmitted through the light transmitting portion 2b. In the optical path L5, the light guided by the 3 rd light guide 43 is transmitted through the 2 nd light guide 42 and the 1 st light guide 41, and then transmitted through the light transmitting portion 2b. Thus, light incident on the light guides 41, 42, 43 from the 3 light sources 51, 52, 53 is emitted radially from the light-transmitting portion 2b and projected onto the interior member (not shown in fig. 2).

When the light sources 5 are disposed at both ends of the light guide 4, light emitted from the light source 5 at the other end, which is not shown, is guided by the light guides 41, 42, 43 and emitted from the light transmitting portion 2b as in the optical paths indicated by the solid line L6 and the broken lines L7, L8. This can form an illumination pattern as shown in fig. 10A and 10B described later.

The interval D between the light transmitting portions 2b is not particularly limited, but is preferably about 20mm to 40 mm. If the interval D is too narrow, the light patterns are excessively overlapped and blurred, and the effect of improving the design property is reduced. On the other hand, if the interval D is too wide, the effect as illumination is reduced, and the energy efficiency is also reduced, which is not preferable.

The combination of the light guide 4 and the light source 5 is not particularly limited. The light source 5 may be, for example, at least one selected from a bulb-color LED, a white LED, and a full-color LED. For example, any one of the LEDs may be disposed so as to face one end of one light guide 4, or may be disposed so as to face both ends. Further, two or three of the three structures may be selected from the structure in which the white LED is disposed opposite to both ends of the one light guide 4, the structure in which the bulb-color LED is disposed opposite to both ends of the one light guide 4, and the structure in which the full-color LED is disposed opposite to both ends of the one light guide 4, and may be disposed in parallel.

As an example, in the configuration shown in fig. 2, the 1 st light source 51 may be a white LED, the 2 nd light source 52 may be a bulb-color LED, the 3 rd light source 53 may be a full-color LED, the amounts of light emitted from the 3 light sources 51, 52, 53 may be varied with time, and the emission color of the 3 rd light source 53 may be varied with time. When the output of the light source 5 disposed at one end of the light guide 4 is increased or decreased, it can be visually confirmed that the intensity of the illumination light emitted from the light transmitting portion 2b along the illumination device 1 changes along the illumination device 1. When the light source 5 is disposed at both ends of the light guide 4 to increase or decrease the output, the swing of the illumination light intensity along the longitudinal direction of the illumination device 1 can be visually confirmed.

Fig. 3A is a schematic cross-sectional view taken along line III-III of fig. 1B, and fig. 3B and 3C show modifications thereof. The bracket 8 and the roof lining 9 are indicated by dashed lines. The light guides 41, 42, 43 are held by the housing 2 and the garnish (decorative member) 3 covering the housing 2. In the example of the figure, the light-transmitting portion 2b is formed as a slit provided in the case 2 made of a light-shielding member. The housing 2 is fixed to a bracket 8 holding a headliner 9 therebetween.

The garnish 3 and the case 2 may be injection molded of, for example, ABS resin, polypropylene resin, or polycarbonate resin. The light shielding portion 2a and the light transmitting portion 2B of the case 2 may be formed by using the slit provided in the opaque resin as the light transmitting portion 2B shown in fig. 3A, or may be formed by attaching an opaque film 20 such as a carbon film to the case 2 made of a transparent resin as shown in fig. 3B, and using a slit provided in the film as the light transmitting portion 2B. Alternatively, as shown in fig. 3C, a light shielding plate (light shielding member) 21 may be provided on the front surface of the case 2, and a slit may be provided in the light shielding plate 21 as the light transmitting portion 2b.

In each of the embodiments shown in fig. 3A, 3B, and 3C, the light guides 41, 42, and 43 have substantially rectangular cross-sectional shapes, respectively, and the center surfaces P1, P2, and P3 of the light guides in the thickness direction are arranged so as to form steps. The light emitted from the light guides 41, 42, 43 is projected onto the strip-shaped region parallel to the longitudinal direction of the light guides 41, 42, 43 in the interior member (headliner 9), but by disposing the light guides in the center planes P1, P2, P3 with steps, the positions where the light emitted from the light guides 41, 42, 43 has the maximum intensity (indicated by triple arrows in fig. 3B) can be distributed over substantially the same strip-shaped region R, and the designability can be improved.

Fig. 4 is a schematic perspective view showing a case where the vehicle lighting device 1 is provided on a roof. After the light guide 4 (41, 42, 43) and the light source (not shown) are provided to the housing 2, the garnish 3 is attached to the housing 2. The locking portion 2c of the housing has a protruding locking claw 2d, and is inserted through a hole (not shown) provided in the headliner 9 and a locking hole 8a provided in the bracket 8, and is locked to the bracket 8 by the locking claw 2 d. Next, the bracket 8 is provided on a roof panel (not shown), so that the vehicle lighting device 1 can be fixed to the roof. In the illustrated embodiment, the bracket 8 has a locking portion 8b for holding a member of a roof panel (not illustrated). The configuration shown in fig. 4 is an example, and the method of fixing the housing 2 to the bracket 8 and the method of fixing the bracket 8 to the roof panel (not shown) are not particularly limited.

Fig. 5 is an enlarged view of a portion indicated by a box V in fig. 2. The slit width W of the light-transmitting portion 2b in fig. 5 is preferably about 1.2mm to 2.0 mm. The plate thickness T1 of the light shielding portion 2a is preferably about 2.0 to 3.0mm, but the plate thickness T2 near the light transmitting portion is preferably about 1.0 to 1.5 mm. The light quantity can be ensured by making the cross section of the light incident side semicircular, triangular, or the like.

Fig. 6 is a schematic perspective view showing an example of the light guide 4 of the lighting device 1 for a vehicle. The light guide (light guide rod) 4 may be formed of a transparent resin such as an acrylic resin or a polycarbonate resin. The reflecting surface (back surface) 4a of the light guide is preferably provided with an optical pattern. The optical pattern may be a conical concave portion, but it is preferable that the prism-shaped grooves 4c having a semicircular or triangular cross section are arranged at regular intervals. By forming the optical pattern as the prism-shaped groove 4c, the width of the brightly illuminated area of the interior component can be enlarged along the longitudinal direction of the light guide 4. The illustrated light guide 4 has a substantially rectangular parallelepiped shape, but may have other polygonal cross-sectional shapes as needed. The light guide 4 may be curved in accordance with the shape of an installation place such as a roof, or 2 or more light guides 4 may be arranged in series for guiding light in a long manner.

Fig. 7A to 7F are schematic views showing a part of the modification of the combination of the light source 5 and the light guide 4 in the lighting device 1 of the present invention. Fig. 7A shows a basic structure, in which a light source 5 is disposed at one end of a light guide 4. In fig. 7B, light sources 5a and 5B are arranged at both ends of the light guide 4. In fig. 7C, two light guides 41 and 42 are arranged in parallel, and light sources 51a, 51b, 52a, and 52b are arranged at both ends of each light guide. In fig. 7D and 7E, in the same configuration as in fig. 7B and 7C, two light guides (4 a and 4B, 41a and 41B, and 42a and 42B) are connected in series, and the light guides are elongated. In fig. 7F, light guides 43a and 43b of column 3 are further provided, and light sources 53a and 53b are disposed at the respective ends.

Specific examples of the configuration include embodiments in which the light source 5 or both of the light sources 5a and 5B are selected from three light sources, that is, a white LED, a bulb-color LED, and a full-color LED, in the configurations of fig. 7A, 7B, and 7D. In the configuration of fig. 7C and 7E in which two rows of light guides are arranged, the following embodiments are given: both of the light sources 51a and 51b are set to any one selected from the above three light sources, and one selected from the remaining two light sources is used for both of the light sources 52a and 52b. As shown in fig. 7F, there is an embodiment in which light sources 53a and 53b provided in three rows with respect to the light guides 43a and 43b of the 3 rd row are used as light sources not selected in the other two rows. In addition, different light sources may be used on both sides of the light guide, and for example, in the configuration of fig. 7D, the light source 5a may be a white LED and the light source 5b may be a bulb-color LED.

As shown in fig. 8, in the vehicle lighting device 1 of the present invention, the output (light output amount) of each light source 5 (51, 52, 53) is controlled for each light source 5 by the output control unit 7. The output control unit 7 is composed of a control unit 70 and a control circuit 71 (three control circuits 71a, 71b, 71c in the figure), and is connected to the light source 5 and the power supply 11 via a wire harness. The control unit 70 controls the current supplied from the control circuit 71 (71 a, 71b, 71 c) to the respective light sources 5 (51, 52, 53) in accordance with the stored program. In addition, when a full-color LED is used as the light source 5, the current supplied to each terminal of RGB is controlled. The number of control circuits 71 may be increased or decreased according to the number of light sources 5.

Fig. 9 is a diagram schematically showing a state in which the vehicle lighting device 1 of the present invention is mounted on the roof 10 of an automobile, and shows a state visually confirmed by a rider of a rear seat. Reference numeral 12 denotes a front seat, 13 denotes a center console, 14 denotes a front window, and 15 denotes a side window. The illumination light L is emitted radially from between the trim 3 provided on the roof 10 and the headliner 9 at a predetermined interval, and is projected onto the headliner 9.

In the configuration shown in fig. 9, the intensity of the illumination light L is attenuated with the distance from the light source (not shown), but by controlling the output of the light source, the position where the illumination light L of the same brightness is emitted is changed. Therefore, by changing the output of the light source with time, it is possible to visually confirm that the boundary of the light and shade of the light emitting pattern changes so as to flow along the decorative member 3.

Fig. 10A and 10B are diagrams schematically showing illumination of the headliner by projected light. For simplicity of explanation, only the illumination pattern is shown in the figures (the same applies to fig. 11 to 13). Fig. 10A shows an appearance in the case where light sources are provided at both ends of one (one row) of light guides 4, and fig. 10B shows an appearance in the case where different light sources 5 are provided at both ends of two rows of light guides 4. The figure shows black and white, but by changing the emission color from the light source 5, a complicated emission pattern (illumination pattern) can be produced.

For example, fig. 11 is a schematic diagram in which the area indicated by a frame line X in fig. 10B is enlarged. For example, in the embodiment shown in fig. 7C, when the light sources 51a and 51b at both ends of the light guide 41 are bulb-color LEDs and the light sources 52a and 52b at both ends of the light guide 42 are full-color LEDs and emit blue light, bulb-color light (light orange light) Lo and blue light Lb are emitted from the light transmitting portion (central lower portion of the figure) in different directions, respectively, as shown in fig. 11, and are visually confirmed as illumination light. At this time, since the emitted light intersects with the light emitted from the adjacent light transmitting portion (not shown), a complex pattern is formed by the intersection of the bulb light Lo and the bulb light Lo, the intersection of the blue light Lb and the blue light Lb, and the intersection of the bulb light Lo and the blue light Lb, as shown in the figure.

Further, as shown in fig. 2, when three colors are emitted using three rows of light guides (41, 42, 43), light of three colors emitted in different directions and their intersections can be illuminated with higher designability. In addition, in the lighting design, whether to emphasize the light pattern emitted from the light transmitting portion 2b or emphasize the intersecting pattern of the illumination light can be adjusted by the interval of the light transmitting portions 2b.

For example, in the device shown in fig. 2, since the directions of light emitted from the light transmitting portions 2b are different depending on the arrangement positions of the light guides and the emission colors of the light sources, the light sources 5 of different emission colors are arranged for the plurality of light guides 4 shown in fig. 2, and the outputs (light amounts) of the light sources 5 are controlled independently with time, respectively, whereby the colors and emission directions of light brightly emitted from the light transmitting portions 2b can be changed with time. Further, by combining the changes in brightness along the light guide 4 therein, dynamic movement of the illumination pattern can be exhibited. This makes it possible to design a more complicated and attractive illumination appearance than in the conventional technique in which only the light output amount of the long light guide 4 is controlled to vary with time.

For example, in the case where the intensities of the light incident on the two rows of light guides 41 and 42 are independently changed, in the configuration illustrated in fig. 11, as schematically illustrated in fig. 12, a change with time can be observed between the pattern (a) in which the bulb color light Lo brightly emits and the pattern (B) in which the blue color light Lb brightly emits.

On the other hand, fig. 13 is a diagram schematically showing a change in the appearance of illumination in the case where light emitted from a continuous gap is projected onto an interior member such as a headliner without providing a light shielding portion and a light transmitting portion in the illumination device. In this case, for example, by controlling the light emission amount of the light source, even if a change such as the flow of illumination light can be exhibited, only the brightly illuminated portion (as in a to B) changes with time. That is, a complicated illumination pattern formed by intersecting illumination light, in which illumination light of different colors emits light in different directions radially, was not observed. Even if a plurality of light guides are arranged in parallel, light of different emission colors is emitted from different light sources, and since mixed light is emitted, it is impossible to observe the intersection of light of different colors shown in fig. 11 and the temporal change of bright emission colors as shown in fig. 12.

Examples

As a test product, a vehicle lighting device having the appearance shown in fig. 1A and 1B and the cross-sectional shape shown in fig. 2 was manufactured. The case 2 is molded from a light-shielding resin, slits 2b having a width of 1.8mm are provided at 30mm intervals on the front surface of the case 2 having a thickness of 2.2mm, and 1 light guide made of acrylic resin (PMMA) having a prism-like groove provided on the back surface thereof is arranged in three rows in the case 2. White LEDs (manufactured by daily chemical industry) are disposed at both ends of the 1 st light guide 41, bulb-color LEDs (manufactured by daily chemical industry) are disposed at both ends of the 2 nd light guide 42, and full-color LEDs (manufactured by daily chemical industry) are disposed at both ends of the 3 rd light guide 43. The current flowing through each light source was changed with time by being provided on the roof of the automobile, and as a result, it was visually confirmed that the current was changed so as to flow in a radial light-emitting pattern.

In addition, at each light-emitting portion, white light, bulb light, colored light (blue light, etc.) emitted from the slit 2b are emitted in different directions and intersect as schematically shown in fig. 11, and a change in the color of bright light and the direction of emitted light with time is observed. Further, the same effect was confirmed even when the housing 2 and the garnish 3 were elongated, and three rows of members were arranged, each of which was formed by connecting 2 light guides (41 a and 41b, 42a and 42b, 43a and 43 b) in series, as shown in fig. 7F.

The present invention is not limited to the above embodiments, and various additions, modifications and deletions can be made without departing from the spirit of the present invention. Accordingly, such a solution is also included in the scope of the present invention.

Description of the reference numerals

1: a lighting device for a vehicle; 2: a housing; 2a: a light shielding section; 2b: a light transmitting portion; 2c: a locking part; 2d: a locking claw; 3: a decoration piece; 4. 41, 42, 43, 41a, 41b, 42a, 42b, 43a, 43b: a light guide; 5. 51, 52, 53, 51a, 51b, 52a, 52b, 53a, 53b: a light source; 6: a wire harness; 7: an output control unit; 70: a control unit; 71. 71a, 71b, 71c: a control circuit; 8: a bracket; 8a: a locking hole; 8b: a locking part; 9: a headliner; 10: a roof; 11: a power supply; 12: a front seat; 13: a central console; 14: a front window; 15: a side window; 20: a light shielding film; 21: a light shielding member; 100: a light-emitting part.

Claims

1. A lighting device for a vehicle, which projects light to an interior component of the vehicle, wherein,

the lighting device comprises a light-emitting part and a decoration part covering the light-emitting part,

the light emitting section includes:

at least one light source;

an output control unit that controls an output of the light source;

a rod-shaped light guide body that guides light emitted from the light source; and

a housing accommodating the light guide body,

the housing is provided with a light shielding part and a plurality of light transmitting parts which are arranged along the length direction of the light guide body in a separated way,

the light transmitted through the light transmitting portion is projected to the interior member,

the light-emitting part comprises a plurality of light sources with different light-emitting colors and a plurality of light-guiding bodies for guiding the light of the light sources with different light-emitting colors,

the output of each light source is independently controlled by the output control part,

the plurality of light guides are arranged in a direction perpendicular to the longitudinal direction.

2. The lighting device of claim 1, wherein,

the output control unit controls the intensity of the light emitted from the light source to vary with time.

3. The lighting device according to claim 1 or 2, wherein,

the lighting device is provided in a headliner of a vehicle,

light transmitted through the light transmitting portion is projected to the headliner from a gap between the headliner and the garnish.

4. The lighting device according to claim 1 or 2, wherein,

the light-transmitting portion is formed by a slit provided in the case made of a light-shielding member.

5. The lighting device according to claim 1 or 2, wherein,

an optical pattern composed of a plurality of grooves is formed on a reflecting surface of the light guide body on the opposite side of the light transmitting portion.

6. The lighting device according to claim 1 or 2, wherein,

the output control unit is disposed inside the garnish.