CN113767031A - Lighting device for vehicle - Google Patents
Lighting device for vehicle Download PDFInfo
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- CN113767031A CN113767031A CN202080030610.XA CN202080030610A CN113767031A CN 113767031 A CN113767031 A CN 113767031A CN 202080030610 A CN202080030610 A CN 202080030610A CN 113767031 A CN113767031 A CN 113767031A
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- Prior art keywords
- light
- lighting device
- light source
- light guide
- vehicle
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Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
- B60Q3/00—Arrangement of lighting devices for vehicle interiors; Lighting devices specially adapted for vehicle interiors
- B60Q3/60—Arrangement of lighting devices for vehicle interiors; Lighting devices specially adapted for vehicle interiors characterised by optical aspects
- B60Q3/62—Arrangement of lighting devices for vehicle interiors; Lighting devices specially adapted for vehicle interiors characterised by optical aspects using light guides
- B60Q3/64—Arrangement of lighting devices for vehicle interiors; Lighting devices specially adapted for vehicle interiors characterised by optical aspects using light guides for a single lighting device
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
- B60Q3/00—Arrangement of lighting devices for vehicle interiors; Lighting devices specially adapted for vehicle interiors
- B60Q3/70—Arrangement of lighting devices for vehicle interiors; Lighting devices specially adapted for vehicle interiors characterised by the purpose
- B60Q3/78—Arrangement of lighting devices for vehicle interiors; Lighting devices specially adapted for vehicle interiors characterised by the purpose for generating luminous strips, e.g. for marking trim component edges
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
- B60Q3/00—Arrangement of lighting devices for vehicle interiors; Lighting devices specially adapted for vehicle interiors
- B60Q3/80—Circuits; Control arrangements
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Arrangements Of Lighting Devices For Vehicle Interiors, Mounting And Supporting Thereof, Circuits Therefore (AREA)
- Planar Illumination Modules (AREA)
Abstract
A vehicle lighting device (1) that projects light to an interior component of a vehicle includes a light-emitting portion (100) and a garnish (3) that covers the light-emitting portion (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). The housing (2) is provided with a light shielding section (2a) and a plurality of light transmitting sections (2b) arranged separately along the light guide body (4). The light transmitted through the light-transmitting part (2b) is projected to the interior component.
Description
RELATED APPLICATIONS
This application claims the priority of japanese patent application 2019- & 105275, filed on 6/5/2019, which is incorporated by reference in its entirety as part of the present application.
Technical Field
The present invention relates to a vehicle lighting device, and more particularly, to a lighting device that can improve the design of lighting in a vehicle interior by projecting light to an interior member of a vehicle.
Background
Conventionally, various lighting devices have been provided in interior portions of vehicles such as automobiles for the purpose of improving design in vehicle compartments. As such interior lighting, there has been proposed a lighting device in which light from a light source is incident on a light guide body, and the light emitted from the light guide body is directly or indirectly visually confirmed by a passenger.
For example, patent document 1 proposes an illumination device in which: light sources having overlapping wavelength regions are arranged at both ends of an elongated light guide body, and smooth light flow can be exhibited by independently controlling the output of each light source.
The light guide is also applied to illumination of the top face portion of the vehicle. Patent document 3 discloses an interior component with indirect lighting, and describes, as an embodiment, the following configuration: a plurality of light guide bodies, a light source arranged to face an end face of the light guide body, and a light diffusion plate covering the light source and bridging between adjacent light guide bodies are arranged along a mounting groove provided in the ceiling surface interior member, and light is irradiated to the outer surface of the ceiling surface member.
Documents of the prior art
Patent document
Patent document 1: japanese patent No. 5602616
Patent document 2: japanese patent No. 5721020
Patent document 3: japanese patent No. 4398452
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 is intended to further improve the design of the vehicle interior in order to improve the comfort of the occupants, a plurality of light guides are arranged in series to provide indirect illumination uniformly over a wide area, but the amount of emitted light is not controlled. In the techniques of patent documents 1 and 2, the flow of light is expressed by a long light guide body by controlling the light source, but pattern control of the light emission shape and the like are not performed. For example, patent document 2 describes that light sources emitting lights of different chromaticities can be used as the 1 st light source disposed at one end of the light guide and the 2 nd light source disposed at the other end, but does not describe that an illumination pattern is formed using illumination lights of different colors.
The invention aims to provide illumination with excellent design by controlling the light emission shape in addition to the light output amount from a light source when using a long light guide body to illuminate an interior part of a vehicle.
Means for solving the problems
A vehicle lighting device according to the present invention is a lighting device for projecting light to an interior member of a vehicle, the lighting device including a light emitting portion and a garnish covering the light emitting portion, the light emitting portion including: at least one light source; an output control unit that controls an output of the light source; a rod-shaped light guide that guides light emitted from the light source; and a housing that houses the light guide, wherein the housing is provided with a light shielding portion and a plurality of light transmitting portions that are arranged separately along the light guide, and the light transmitted through the light transmitting portions is projected onto the interior member.
According to the vehicle lighting device configured as described above, the pattern design of the light projected as indirect lighting to the interior member can be performed by the configuration in which the light is projected from the light-transmitting portion disposed apart from the long light guide. Therefore, high designability can be given to the illumination in the vehicle interior.
In the above 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 of the respective emission colors, and the output control unit may independently control the outputs of the respective light sources.
According to the above vehicle illumination device, by emitting lights of two or more different colors simultaneously and/or with time, it is possible to visually confirm a pattern in which the lights of the different colors intersect, and a state in which the color and direction of the bright illumination light change, and the degree of freedom in design of the illumination device is large.
In the 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 configured as described above, by controlling the intensity of the projected light so as to change with time, the pattern and color of the illumination can be changed with time, and a highly designable illumination effect can be achieved.
In the above vehicle lighting device, the vehicle lighting device may be fixed to a roof of the vehicle, and the light transmitted through the translucent portion may be projected toward the headliner from a gap between the headliner and the garnish, which are the interior member.
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 effect of indirect lighting with high design can be obtained.
In the above vehicle illumination device, the light-transmitting portion may be formed by a slit provided in the housing made of a light-shielding member.
In the above vehicle lighting device, an optical pattern including a plurality of grooves may be formed on a reflection surface of the light guide opposite to the translucent portion.
In the above 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 the description and/or the drawings is encompassed by the present invention. In particular, any combination of 2 or more of the claims of the present invention is included in the present invention.
Drawings
The present invention will be more clearly understood from the following description of preferred embodiments with reference to the accompanying drawings. However, the embodiments and the drawings are only for illustration and description and are not intended to determine the scope of the present invention. The scope of the invention is to be determined by the claims appended hereto. In the drawings, like reference numerals designate identical or corresponding parts throughout the several views.
Fig. 1A is a front view showing an external appearance of a vehicle lighting device of the present invention.
Fig. 1B is a schematic front view showing a portion surrounded by a broken line B in fig. 1A in an enlarged manner.
Fig. 2 is a sectional view taken along line II-II of fig. 1B.
Fig. 3A is a sectional view taken along line III-III of fig. 1B.
Fig. 3B is a cross-sectional view of a modified vehicle illumination device.
Fig. 3C is a cross-sectional view of a vehicle lighting device 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 the 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 vehicle lighting device of the present invention.
Fig. 7A is a diagram for explaining an example of the arrangement of the light source and the light guide in the illumination device of the present invention.
Fig. 7B is a diagram for explaining another example of the arrangement of the light source and the light guide in the illumination device of the present invention.
Fig. 7C is a diagram for explaining still another example of the arrangement of the light source and the light guide in the illumination device of the present invention.
Fig. 7D is a diagram for explaining still another example of the arrangement of the light source and the light guide in the illumination device of the present invention.
Fig. 7E is a diagram for explaining still another example of the arrangement of the light source and the light guide in the illumination device of the present invention.
Fig. 7F is a diagram for explaining still another example of the arrangement of the light source and the light guide in the illumination 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 illustrating a state in which the vehicle lighting device of the present invention is installed on the roof of an automobile and illuminates.
Fig. 10A is a view illustrating an illumination pattern in a case where light sources are provided at both ends of a light guide in the vehicle illumination device according to the present invention.
Fig. 10B is a diagram illustrating an illumination pattern in the case where light sources are provided at both ends of two rows of light guides in the vehicle illumination device according to 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 of illumination light with bright luminance and the light emission direction change with time when two rows of light guides are illuminated with light sources having different emission colors.
Fig. 13 is a diagram schematically showing a temporal change in 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 an upper direction, the X direction indicates a vehicle front direction, and the Y direction indicates a vehicle interior direction in the vehicle width direction.
As shown in fig. 1A, a vehicle lighting device 1 according to an embodiment of the present invention is a long object. As shown in fig. 1B, which is an enlarged view, the vehicle lighting device 1 includes a housing 2 that houses a light guide (not shown) and a garnish (decorative member) 3 that covers the housing 2. The housing 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 mounting the vehicle lighting device 1 on an interior trim (not shown).
As shown in fig. 2, a plurality of light guides 4 (3 light guides 41, 42, 43 in the figure) are arranged in parallel inside the housing 2, and light sources 5 (3 light sources 51, 52, 53 in the figure) are arranged facing the respective end faces. The light source 5 is connected to an output control unit 7 via a wire harness 6. The housing 2, the light guide 4, the light source 5, and the output control section 7 constitute a light emitting section 100. Here, the output control unit 7 is shown inside the garnish 3 for the sake of explanation, but the output control unit 7 may be provided outside the garnish 3.
The light emitted from the light source 5 and incident on 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 rear 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 rear surface 4a is reflected at a large angle by reflection of light in the optical pattern 4c and 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 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, 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 indicated 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 indicated 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 in the optical paths L2 and L3 passes through the translucent portion 2 b. In the optical path L4, the light guided and emitted by the 2 nd light guide 42 passes through the 1 st light guide and then passes through the light-transmitting portion 2 b. In the optical path L5, the light guided and emitted by the 3 rd light guide 43 passes through the 2 nd light guide 42 and the 1 st light guide 41, and then passes through the light-transmitting portion 2 b. Thus, the light incident on the light guides 41, 42, and 43 from the 3 light sources 51, 52, and 53 is radially emitted from the light transmission portion 2b and projected onto the built-in member (not shown in fig. 2).
In addition, 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, not shown, is also guided by the light guides 41, 42, and 43 and emitted from the light transmission portion 2b, as in the optical paths shown by the solid line L6 and the broken lines L7 and L8. This enables formation of an illumination pattern as shown in fig. 10A and 10B described later.
The distance 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 overlap excessively and become blurred, and the effect of improving the design 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 lowered, 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 at least one selected from, for example, a bulb color LED, a white LED, and a full color LED. For example, any one of the LEDs may be disposed to face one end of one light guide 4, or may be disposed to face both ends. Two or three types of white LEDs may be arranged in parallel, selected from three types of white LEDs arranged to face the two ends of the single light guide 4, bulb-color LEDs arranged to face the two ends of the single light guide 4, and full-color LEDs arranged to face the two ends of the single light guide 4.
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 emission of the 3 light sources 51, 52, 53 may be changed with time, and the color of light emission of the 3 rd light source 53 may be changed 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 flow of the illumination device 1. When the light sources 5 are disposed at both ends of the light guide 4 and the output is increased or decreased, the illumination light intensity can be visually confirmed to swing along the longitudinal direction of the illumination device 1.
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 carrier 8 and the headliner 9 are indicated by dashed lines. The light guide members 41, 42, 43 are held by the housing 2 and a garnish (decorative member) 3 covering the housing 2. In the example shown in the figure, the light-transmitting portion 2b is formed as a slit provided in the housing 2 made of a light-shielding member. The case 2 is fixed to the bracket 8, holding the headliner 9 therebetween.
The garnish 3 and the housing 2 may be formed by injection molding of, for example, ABS resin, polypropylene resin, polycarbonate resin, or the like. The light-shielding portion 2a and the light-transmitting portion 2B of the case 2 may be the slits provided in the opaque resin as shown in fig. 3A as the light-transmitting portions 2B, or as shown in fig. 3B, an opaque film 20 such as a carbon film may be attached to the case 2 made of a transparent resin, and the slits provided in the film may be the light-transmitting portions 2B. Alternatively, as shown in fig. 3C, a light shielding plate (light shielding member) 21 may be provided on the front surface of the housing 2, and slits may be provided in the light shielding plate 21 to form the light transmitting portion 2 b.
In each of the embodiments shown in fig. 3A, 3B, and 3C, each of the light guides 41, 42, and 43 has a substantially rectangular cross-sectional shape, and the center planes P1, P2, and P3 in the thickness direction of each light guide are arranged to form steps. The light emitted from each of the light guides 41, 42, 43 is projected in the interior member (headliner 9) to the strip-shaped region parallel to the longitudinal direction of the light guides 41, 42, 43, but by being arranged with steps on the center planes P1, P2, P3, the positions where the light emitted from each of the light guides 41, 42, 43 has the maximum intensity (indicated by triple arrows in fig. 3B) can be distributed over the substantially same strip-shaped region R, and the design can be improved.
Fig. 4 is a schematic perspective view showing a case where the vehicle lighting device 1 is installed on a roof. After the light guide 4(41, 42, 43) and the light source (not shown) are provided in the case 2, the garnish 3 is attached to the case 2. The locking portion 2c of the housing has a projecting locking claw 2d, 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 the roof panel (not shown), whereby the vehicle lighting device 1 can be fixed to the roof. In the illustrated embodiment, the bracket 8 has a locking portion 8b for clamping a member of a roof panel (not illustrated). The configuration shown in fig. 4 is an example, and a method of fixing the case 2 to the bracket 8 and a method of fixing the bracket 8 to a roof panel (not shown) are not particularly limited.
Fig. 5 is an enlarged view of a portion indicated by a frame V in fig. 2. The slit width W of the light transmission section 2b in FIG. 5 is preferably about 1.2mm to 2.0 mm. The thickness T1 of the light-shielding portion 2a is preferably about 2.0 to 3.0mm, while the thickness T2 of the vicinity of the light-transmitting portion is preferably about 1.0 to 1.5 mm. Further, the incident light amount may be secured 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 body (light guide rod) 4 can be formed of a transparent resin such as acrylic resin or polycarbonate resin. Preferably, an optical pattern is provided on the reflection surface (back surface) 4a of the light guide. The optical pattern may be a conical recess, but preferably, prismatic grooves 4c having a semicircular or triangular cross section are arranged at regular intervals. By forming the optical pattern into the prism-shaped groove 4c, the width of the region in which the interior member is brightly illuminated can be increased along the longitudinal direction of the light guide 4. The light guide 4 shown in the figure has a substantially rectangular parallelepiped shape, but may have another polygonal cross-sectional shape as necessary. In some cases, the light guide 4 may be curved in accordance with the shape of the installation place such as a vehicle roof, or 2 or more light guides 4 may be arranged in series for long light guide.
Fig. 7A to 7F are schematic diagrams showing a part of a modification of the combination of the light source 5 and the light guide 4 in the illumination device 1 of the present invention. Fig. 7A is a basic configuration, and a light source 5 is arranged 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 (4a 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 in the 3 rd row are further provided, and light sources 53a and 53b are arranged at the respective end portions.
As a specific configuration, in the configurations of fig. 7A, 7B, and 7D, the light source 5 or both the light sources 5a and 5B may be selected from three types of light sources, i.e., a white LED, a bulb color LED, and a full-color LED. In the configurations of fig. 7C and 7E in which two rows of light guides are arranged, the following embodiments are given: both the light sources 51a and 51b are set to any one selected from the three kinds of light sources described above, and one selected from the remaining two kinds is used for both the light sources 52a and 52 b. Further, as shown in fig. 7F, an embodiment may be mentioned in which light sources 53a and 53b provided for light guides 43a and 43b in row 3 are arranged in three rows of light guides 4, and light sources that are not selected in the other two rows are used. Further, 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 illumination 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, and 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 currents supplied from the control circuits 71(71a, 71b, 71c) to the 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 the control circuits 71 may be increased or decreased depending on the number of the light sources 5.
Fig. 9 is a diagram schematically showing a state in which the vehicle lighting device 1 of the present invention is installed on the roof 10 of an automobile, and shows a state in which it is visually confirmed by a passenger 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 at a predetermined interval from between the garnish 3 provided on the roof 10 and the roof head lining 9, and is projected onto the roof head lining 9.
In the configuration shown in fig. 9, the intensity of the illumination light L attenuates with distance from the light source (not shown), but the position at which the illumination light L of the same brightness is emitted changes by controlling the output of the light source. Therefore, by changing the output of the light source with time, it is possible to visually confirm that the boundary between light and dark of the light-emitting pattern changes so as to flow along the garnish 3.
Fig. 10A and 10B are diagrams schematically illustrating illumination of the headliner by the projected light. For simplicity of explanation, only the illumination pattern is shown in the drawings (the same applies to fig. 11 to 13). Fig. 10A shows an appearance in a case where light sources are provided at both ends of one (one line) light guide 4, and fig. 10B shows an appearance in a case where different light sources 5 are provided at both ends of two lines of light guides 4. The figure shows black and white, but a complicated light emission pattern (illumination pattern) can be produced by changing the emission color from the light source 5.
For example, fig. 11 is an enlarged schematic view of the region indicated by the block line X in fig. 10B. 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, the bulb color light (light orange light) Lo and the blue light Lb are emitted in different directions from the light transmission portion (lower center portion in the figure) as shown in fig. 11 and visually recognized as illumination light. At this time, the emitted light intersects with light emitted from an adjacent light transmission portion (not shown), and therefore, as shown in the drawing, a complicated pattern is formed by the intersection of the bulb color light Lo and the bulb color light Lo, the intersection of the blue light Lb and the blue light Lb, and the intersection of the bulb color light Lo and the blue light Lb.
Further, as shown in fig. 2, when three colors are emitted using three rows of light guides (41, 42, 43), the intersection of the light of the three colors emitted in different directions enables higher design illumination. In the illumination design, whether the light pattern radiated from the light transmitting portion 2b is emphasized or the intersection pattern of the illumination light is emphasized can be adjusted by the interval of the light transmitting portion 2 b.
For example, in the device shown in fig. 2, since the direction of light emitted from the light-transmitting portion 2b differs depending on the position of the light guide and the emission color of the light source, the light sources 5 of different emission colors are arranged for each of the plurality of light guides 4 shown in fig. 2, and the output (light amount) of the light sources 5 is controlled so as to change over time independently of each other, whereby the color and emission direction of light brightly emitted from the light-transmitting portion 2b can be changed over time. Further, by combining therein the change in brightness along the light guide 4, dynamic motion of the illumination pattern can be performed. Thus, it is possible to design a more complicated and aesthetically pleasing illumination appearance, as compared with the conventional technique in which only the light output amount of the long light guide 4 is controlled to change with time.
For example, when the intensities of the light incident on the two rows of light guides 41 and 42 are independently changed, in the configuration described in fig. 11, as schematically shown in fig. 12, a temporal change can be observed between a pattern (a) in which the bulb color light Lo brightly emits light and a pattern (B) in which the blue light Lb brightly emits light.
On the other hand, fig. 13 is a diagram schematically showing a change in appearance of illumination in a case where the illumination device is provided with no light shielding portion and no light transmitting portion and light emitted from a continuous gap is projected onto an interior member such as a headliner. In this case, for example, even if a change such as a flow of illumination light can be expressed by controlling the light emission amount of the light source, the brightly illuminated portion changes only (as in a to B) with time. That is, no complicated illumination pattern formed by intersecting illumination lights is observed in the case where illumination lights of different colors are emitted radially in different directions. Even if a plurality of light guides are arranged in parallel, light of different emission colors is incident from different light sources, and since mixed light is emitted, it is not possible to observe the intersection of light of different colors as shown in fig. 11 and the temporal change of bright emission colors as shown in fig. 12.
Examples
As a test product, a vehicle illumination device having an external appearance shown in fig. 1A and 1B and a cross-sectional shape shown in fig. 2 was manufactured. The housing 2 was molded from a light-shielding resin, slits 2b having a width of 1.8mm were provided at 30mm intervals on the front surface of the housing 2 having a thickness of 2.2mm, and 1 light guide bodies made of acrylic resin (PMMA) having a prism-shaped groove on the rear surface were arranged in three rows in parallel in the housing 2. White LEDs (manufactured by riya chemical industries, inc.) are disposed at both ends of the 1 st light guide 41, bulb color LEDs (manufactured by riya chemical industries, inc.) are disposed at both ends of the 2 nd light guide 42, and full-color LEDs (manufactured by riya chemical industries, inc.) are disposed at both ends of the 3 rd light guide 43. The light source was installed on the roof of an automobile, and the current flowing through each light source was changed with time, and as a result, it was visually confirmed that the light source was changed so as to flow a radial light emission pattern.
In addition, in each light emitting portion, as schematically shown in fig. 11, white light, bulb color light, and colored light (blue light, etc.) emitted from the slit 2b are emitted in different directions and intersect with each other, and a change in color of bright light and a change in light emitting direction with time are observed. Further, the same effect was confirmed when the housing 2 and the garnish 3 were elongated and the members in which 2 light guides (41a and 41b, 42a and 42b, and 43a and 43b) were connected in series were arranged in three rows as shown in fig. 7F.
The present invention is not limited to the above embodiments, and various additions, modifications, and deletions can be made within the scope not departing from the gist of the present invention. Therefore, such a technical solution is also included in the scope of the present invention.
Description of the reference symbols
1: a lighting device for a vehicle; 2: a housing; 2 a: a light shielding portion; 2 b: a light-transmitting portion; 2 c: a card-holding section; 2 d: a locking claw; 3: a decorative member; 4. 41, 42, 43, 41a, 41b, 42a, 42b, 43a, 43 b: a light guide; 5. 51, 52, 53, 51a, 51b, 52a, 52b, 53a, 53 b: a light source; 6: a wire harness; 7: an output control section; 70: a control unit; 71. 71a, 71b, 71 c: a control circuit; 8: a bracket; 8 a: a locking hole; 8 b: a card-holding section; 9: a headliner; 10: a vehicle roof; 11: a power source; 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 section.
Claims (7)
1. A lighting device for a vehicle, which projects light toward an interior member of the vehicle,
the lighting device has a light emitting portion and a garnish covering the light emitting portion,
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 that guides light emitted from the light source; and
a housing that houses the light guide body,
the housing is provided with a light shielding portion and a plurality of light transmitting portions arranged along the light guide body,
the light transmitted through the light transmission part is projected to the interior component.
2. The lighting device of claim 1,
the light emitting section has a plurality of light sources having different emission colors and a plurality of light guides for guiding light from the light sources of the respective emission colors,
the output of each light source is independently controlled by the output control section.
3. The lighting device according to claim 1 or 2,
the output control unit controls the intensity of the light emitted from the light source to vary with time.
4. The lighting device according to any one of claims 1 to 3,
the lighting device is provided to a headliner of a vehicle,
the light transmitted through the light-transmitting portion is projected from a gap between the roof lining and the garnish to the roof lining.
5. The lighting device according to any one of claims 1 to 4,
the light-transmitting portion is formed by a slit provided in the housing made of a light-shielding member.
6. The lighting device according to any one of claims 1 to 5,
an optical pattern composed of a plurality of grooves is formed on a reflection surface of the light guide body on the opposite side of the light transmission portion.
7. The lighting device according to any one of claims 1 to 6,
the output control unit is disposed inside the garnish.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2019-105275 | 2019-06-05 | ||
| JP2019105275 | 2019-06-05 | ||
| PCT/JP2020/020147 WO2020246257A1 (en) | 2019-06-05 | 2020-05-21 | Vehicular lighting device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113767031A true CN113767031A (en) | 2021-12-07 |
| CN113767031B CN113767031B (en) | 2024-03-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202080030610.XA Active CN113767031B (en) | 2019-06-05 | 2020-05-21 | Lighting device for vehicle |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP7367017B2 (en) |
| CN (1) | CN113767031B (en) |
| WO (1) | WO2020246257A1 (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0675120A (en) * | 1992-08-25 | 1994-03-18 | Bridgestone Corp | Indirect illuminator |
| JP2008132807A (en) * | 2006-11-27 | 2008-06-12 | Hayashi Telempu Co Ltd | Interior material with indirect lighting system of automobile |
| JP2011251580A (en) * | 2010-05-31 | 2011-12-15 | Toyota Boshoku Corp | Vehicle interior lighting device |
| CN105163981A (en) * | 2013-05-29 | 2015-12-16 | 提爱思科技股份有限公司 | Light-emitting part for vehicle |
| CN106604846A (en) * | 2014-09-05 | 2017-04-26 | 林特琅普股份有限公司 | Illumination device |
| EP3184363A1 (en) * | 2015-12-24 | 2017-06-28 | Seat, S.A. | Lighting device for an interior panel of a vehicle |
| JP2018016166A (en) * | 2016-07-27 | 2018-02-01 | 林テレンプ株式会社 | Vehicular lighting system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6553942B2 (en) * | 2015-05-19 | 2019-07-31 | 株式会社ヴァレオジャパン | Lighting device |
-
2020
- 2020-05-21 WO PCT/JP2020/020147 patent/WO2020246257A1/en active Application Filing
- 2020-05-21 CN CN202080030610.XA patent/CN113767031B/en active Active
- 2020-05-21 JP JP2021524750A patent/JP7367017B2/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0675120A (en) * | 1992-08-25 | 1994-03-18 | Bridgestone Corp | Indirect illuminator |
| JP2008132807A (en) * | 2006-11-27 | 2008-06-12 | Hayashi Telempu Co Ltd | Interior material with indirect lighting system of automobile |
| JP2011251580A (en) * | 2010-05-31 | 2011-12-15 | Toyota Boshoku Corp | Vehicle interior lighting device |
| CN105163981A (en) * | 2013-05-29 | 2015-12-16 | 提爱思科技股份有限公司 | Light-emitting part for vehicle |
| CN106604846A (en) * | 2014-09-05 | 2017-04-26 | 林特琅普股份有限公司 | Illumination device |
| EP3184363A1 (en) * | 2015-12-24 | 2017-06-28 | Seat, S.A. | Lighting device for an interior panel of a vehicle |
| JP2018016166A (en) * | 2016-07-27 | 2018-02-01 | 林テレンプ株式会社 | Vehicular lighting system |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2020246257A1 (en) | 2020-12-10 |
| JPWO2020246257A1 (en) | 2020-12-10 |
| JP7367017B2 (en) | 2023-10-23 |
| CN113767031B (en) | 2024-03-22 |
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