Interior lighting system

Abstract

This vehicle interior lighting system provides a lighting environment that can create a pleasant atmosphere inside the vehicle without causing glare to the occupants. [Solution] The vehicle interior lighting system 1 comprises a seat 60 installed in the vehicle interior 2a of a vehicle such as an automobile 2, and a lighting device 3 installed on the seat back 200 of the seat 60, the lighting device 3 irradiating illumination light that lights up the back surface 210 of the seat back 200.

Description

Technical Field

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[0001] The present invention relates to an in-vehicle lighting system.

Background Art

[0002] As in-vehicle lighting, lighting devices installed in the interior of vehicles such as automobiles are known (Patent Document 1). Conventionally, as in-vehicle lighting, ceiling lighting installed on the ceiling of the vehicle has been mainstream.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in ceiling lighting, there is a risk that the lighting light irradiates the face of the occupant, and the occupant may feel glare. Also, with ceiling lighting, it is difficult to create the space inside the vehicle, and it is impossible to give the occupant a sense of staging, high quality, or liberation.

[0005] The present invention has been made to solve such problems, and an object thereof is to provide an in-vehicle lighting system that can create the space inside the vehicle without the occupant feeling glare.

Means for Solving the Problems

[0006] To achieve the above object, one aspect of the in-vehicle lighting system according to the present invention includes a seat provided in the interior of a vehicle and a lighting device installed on a seat back of the seat, and the lighting device irradiates lighting light that illuminates the back surface of the seat back.

Effects of the Invention

[0007] According to the present invention, the interior space of a vehicle can be designed without the occupants experiencing glare. [Brief explanation of the drawing]

[0008] [Figure 1] Figure 1 is a top view of an automobile with an interior lighting system according to an embodiment. [Figure 2] Figure 2 is a side cross-sectional view of an automobile in an interior lighting system according to an embodiment. [Figure 3] Figure 3 is a diagram illustrating the illumination area irradiated by the illumination light of the lighting device in the vehicle interior lighting system according to the embodiment. [Figure 4] Figure 4 is a diagram illustrating the illumination area irradiated by the illumination light of the lighting device in the vehicle interior lighting system according to the embodiment. [Figure 5] Figure 5 is a diagram illustrating a modified lighting device. [Modes for carrying out the invention]

[0009] The embodiments of the present invention will be described below with reference to the drawings. Note that the embodiments described below are all specific examples of the present invention. Therefore, the numerical values, shapes, materials, components, arrangement positions of components, and connection configurations shown in the following embodiments are examples and are not intended to limit the present invention. Accordingly, among the components in the following embodiments, those not described in the independent claims representing the highest-level concept of the present invention will be described as optional components.

[0010] Each figure is a schematic diagram and not necessarily a strictly accurate representation. Therefore, the scale and other aspects may not necessarily be consistent across all figures. In each figure, substantially identical components are denoted by the same reference numerals, and redundant explanations are omitted or simplified.

[0011] In this specification, "forward" refers to the direction of travel when the vehicle is moving forward, and "rearward" refers to the direction of travel when the vehicle is moving backward. The right side when the vehicle is moving forward is referred to as "right direction," the left side when the vehicle is moving forward is referred to as "left direction," the ceiling side of the vehicle is referred to as "up" or "upper side," and the floor side of the vehicle is referred to as "down" or "lower side." In this specification, the terms "up" and "down" do not refer to the absolute upward direction (vertically upward) and downward direction (vertically downward) in terms of spatial perception, but may be used as terms defined by relative positional relationships.

[0012] (Embodiment) First, the configuration of the vehicle interior lighting system 1 according to the embodiment will be explained using Figures 1 and 2. Figure 1 is a top view of the vehicle 2 in the vehicle interior lighting system 1 according to the embodiment, and Figure 2 is a side cross-sectional view of the vehicle 2.

[0013] As shown in Figures 1 and 2, the vehicle interior lighting system 1 comprises a vehicle 2 and at least one lighting device 3 installed in the vehicle 2.

[0014] Automobile 2 is an example of a mobile body and comprises a vehicle having a passenger compartment 2a. The passenger compartment 2a in automobile 2 is composed of a plurality of interior lining members. The passenger compartment 2a has a ceiling 10, a floor 20, a pillar trim 30, and a door trim 40 as a plurality of interior lining members.

[0015] The automobile 2 has doors 50. The doors 50 include a front door 51 and a rear door 52. By opening and closing the front door 51 or the rear door 52, occupants can enter the passenger compartment 2a or exit the passenger compartment 2a. Each of the front door 51 and the rear door 52 is provided with a window pane.

[0016] As shown in FIGS. 1 and 2, a seat 60, which is a seat for an occupant to sit on, is provided in the passenger compartment 2a. A plurality of seats 60 are provided in the passenger compartment 2a. Specifically, in the passenger compartment 2a, a front seat 61 and a rear seat 62 are provided as the plurality of seats 60.

[0017] The front seat 61 is a front seat provided in the front of the passenger compartment 2a. Specifically, in the passenger compartment 2a, as the front seat 61, a driver's seat 6la for the driver to sit on and a passenger seat 61b located adjacent to the driver's seat 61a are provided. In the present embodiment, since the steering wheel is provided on the right side, the driver's seat 61a is located on the right side and the passenger seat 61b is located on the left side.

[0018] The rear seat 62 is a rear seat provided in the rear of the passenger compartment 2a. Specifically, the rear seat 62 is provided behind the front seat 61. In the present embodiment, the rear seat 62 is one seat extending in the left - right direction. In this case, a plurality of two or three occupants can sit on the rear seat 62. Note that the rear seat 62 is not limited to one seat and may be divided into two seats on the left and right. Also, the rear seat 62 may be composed of two rows in the front - rear direction. That is, the rear seat 62 may be composed of a second - row seat and a third - row seat.

[0019] Each seat 60 has a seat part 100 which is the part where the occupant sits, a seat back 200 (backrest part) that supports the occupant's back, and a headrest 300 attached to the upper part of the seat back 200. That is, each of the front seat 61 (driver's seat 61a, passenger seat 61b) and the rear seat 62 has a seat part 100, a seat back 200, and a headrest 300. Note that each seat 60 may further have an armrest.

[0020] As shown in FIG. 2, the ceiling 10 is a roof trim. Specifically, the ceiling 10 is a headlining. The ceiling 10 is fixed to the roof 2b of the vehicle 2. In this case, the ceiling 10 may be directly attached to the inner surface of the roof 2b, or may be installed by being suspended from the roof 2b.

[0021] The floor 20 is a floor trim. Specifically, the floor 20 is a floor carpet fixed to the frame constituting the vehicle body skeleton of the vehicle 2 (automobile). Although not shown, a floor mat is laid on the floor 20.

[0022] As shown in FIGS. 1 and 2, the pillar trim 30 is composed of a plurality of pillars. Specifically, the pillar trim 30 has an A pillar 31 which is a front pillar provided beside the windshield, and a B pillar 32 which is a center pillar provided between the front seat 61 and the rear seat 62. Note that the pillar trim 30 may further have a C pillar and a D pillar provided diagonally rearward of the rear seat 62.

[0023] As shown in FIG. 2, the door trim 40 is an interior member covering the door panels of the front door 51 and the rear door 52. The door trim 40 is provided with an armrest portion, an operation portion such as an operation switch (operation button), a cup holder, a door knob, and a storage space.

[0024] The lighting device 3 is an in-vehicle lighting device (in-vehicle illumination) installed in the passenger compartment 2a. The lighting device 3 is a seat-back light installed on the seat back 200 (backrest portion) of the seat 60. In the present embodiment, the lighting device 3 is installed on the front seat 61. Specifically, the lighting device 3 is installed on the back surface 210 (the surface on the rear seat 62 side) of the seat back 200 of the front seat 61. The lighting device 3 is installed on each of the driver's seat 61a and the passenger seat 61b. Therefore, two lighting devices 3 are installed in the vehicle 2 as seat-back lights.

[0025] The lighting device 3 emits illumination light that illuminates the back surface 210 of the seat back 200. In other words, the illumination light emitted from the lighting device 3 illuminates the back surface 210 of the seat back 200. In this embodiment, the lighting device 3 emits illumination light directed towards the back surface 210 of the seat back 200.

[0026] In this way, the lighting device 3 does not shine illumination light towards the rear seat 62, but rather towards the back of the seat back 200 210, thus suppressing glare for occupants seated in the rear seat 62 of the automobile 2.

[0027] Furthermore, the light from the lighting device 3 illuminates the back surface 210 of the seat back 200, indirectly illuminating the space inside the passenger compartment 2a. In other words, the lighting device 3 is indirect lighting that indirectly brightens the space inside the passenger compartment 2a. The light from the lighting device 3 does not directly illuminate the space inside the passenger compartment 2a, but is reflected off the back surface 210 of the seat back 200 before being emitted into the passenger compartment 2a. This allows for the creation of an ambiance within the passenger compartment 2a using indirect lighting, thereby providing occupants with a sense of style, sophistication, or openness.

[0028] Furthermore, the lighting device 3 is installed at the upper end of the seat back 200 and emits illumination light toward the floor 20. In other words, the lighting device 3 emits illumination light downwards. This further reduces glare experienced by occupants seated in the rear seat 62.

[0029] In this case, the lighting device 3 should be installed at a position lower than the eye level of the occupant seated in the rear seat 62. This further reduces the glare experienced by the occupant seated in the rear seat 62.

[0030] Furthermore, the illumination light from the lighting device 3 may be directed only to the back surface 210 of the seat back 200, or it may also be directed to the floor 20. In other words, the illumination light from the lighting device 3 may be directed to both the back surface 210 of the seat back 200 and the floor surface of the floor 20.

[0031] This brightens the area around the feet of passengers seated in the rear seats 62, giving them a sense of spaciousness. Additionally, the illumination of the floor 20 provides passengers with a sense of security when getting in and out of the vehicle.

[0032] The lighting device 3 may be illuminated when the driver is about to get into the vehicle 2. For example, the lighting device 3 may be illuminated when the key lock on the door 50 is released or when the door 50 is opened. Alternatively, the lighting device 3 may be illuminated when the ignition power is turned on (for example, when the engine starts and the vehicle 2 is ready to drive).

[0033] In this embodiment, the lighting device 3 remains lit even when the driver is operating the vehicle 2 (while driving). In other words, illumination light is emitted from the lighting device 3 while driving. The lighting device 3 may also remain lit when an occupant gets out of the vehicle 2. Furthermore, the lighting device 3 may only be lit when getting in and out of the vehicle and not while driving, or it may only be lit while driving. In addition, the lighting device 3 may be lit not only at night but also during the day. By illuminating the lighting device 3 during the day, an open and brightly lit space can be created.

[0034] Furthermore, the lighting device 3 may be automatically turned on or off at predetermined timings as described above, but the driver may also control the turning on and off of the lighting device 3 using a switch located at the driver's fingertips. Alternatively, an occupant seated in the rear seat 62 may control the turning on and off of the lighting device 3 using a switch installed on the door trim 40 of the rear door 52.

[0035] The lighting device 3 is a lighting fixture having a light source (not shown) and irradiates light of a predetermined color as illumination light. The light source used in the lighting device 3 is, for example, an LED light source composed of light-emitting diodes (LEDs). Therefore, the lighting device 3 is an LED lighting device. The LED light source has, for example, a mounting substrate such as a PCB substrate and one or more LED elements mounted on the mounting substrate. The lighting device 3 has a housing that houses the LED light source, and the light emitted from the LED light source passes through an opening in the housing and irradiates a predetermined illumination area.

[0036] The illumination light emitted from the lighting device 3 is white light. In other words, the illumination light emitted from the LED light source of the lighting device 3 is white light. In this embodiment, the color of the illumination light emitted from the lighting device 3 is, for example, a warm color with a low color temperature, such as incandescent light, but is not limited to this. For example, the color of the illumination light emitted from the lighting device 3 may be a cool color with a high color temperature, such as daylight. The illumination light emitted from each lighting device 3 has a predetermined color temperature within the range of 2500K to 7000K. Note that the color of the illumination light emitted from the lighting device 3 is not limited to white light, but may be colored, such as blue, red, or green.

[0037] The lighting device 3 includes a light-emitting section 3a having a light-emitting surface from which light is emitted as the outer surface of the lighting device 3. In this embodiment, the light-emitting section 3a is a translucent cover through which light emitted from the light source is transmitted. In this case, the outer surface of the translucent cover becomes the light-emitting surface of the lighting device 3. The translucent cover is also an outer shell member of the lighting device 3. Therefore, the translucent cover is exposed inside the vehicle compartment 2a. Note that the light-emitting section 3a is not limited to a translucent cover. For example, if the lighting device 3 does not have a translucent cover, the light-emitting section 3a may be an opening such as a slit from which light emitted from the light source is emitted, or it may be the light source itself.

[0038] The lighting device 3 is preferably configured such that the light-emitting part 3a (translucent cover) cannot be directly seen by occupants seated in the seats 60 inside the passenger compartment 2a. In this case, the lighting device 3 is a glare-free light configured so that the light-emitting part 3a is not visible to the occupants. In this way, by preventing the illumination light from directly entering the occupants' eyes, a comfortable lighting environment can be obtained inside the passenger compartment 2a.

[0039] Furthermore, the lighting device 3 is a line light that emits a linear illumination light. In other words, the lighting device 3 is elongated. Specifically, as shown in Figure 1, the lighting device 3 extends along the width direction of the vehicle. In this case, the lighting device 3 may extend in a straight line, or if the back of the seat back 200 is curved, it may extend in a curved shape.

[0040] By using line lighting for the lighting device 3, the illumination light can be projected across the width of the back surface 210 of the seat back 200. This allows the entire illuminated area from the lighting device 3 to be formed into a wide rectangular shape that extends downwards, thereby enhancing the spatial design effect.

[0041] Here, the details of the illumination area IA irradiated by the illumination light of the lighting device 3 will be explained using Figures 3 and 4. Figures 3 and 4 are diagrams illustrating the illumination area IA irradiated by the illumination light of the lighting device 3 in the vehicle interior lighting system 1 according to the embodiment. Figure 3 is a side view of the upper part of the front seat 61, and Figure 4 is a perspective view of the seat back 200 of the front seat 61 as seen from the rear seat 62.

[0042] As described above, the illumination light from the lighting device 3 is directed toward the back surface 210 of the seat back 200. In this embodiment, as shown in Figures 3 and 4, the illumination area IA of the illumination light on the back surface 210 includes light and dark areas. In other words, the illumination light from the lighting device 3 creates shadows (differences in brightness) on the back surface 210 of the seat back 200. The illumination area IA includes a light area, which is a relatively bright area, and a dark area, which is a relatively dark area.

[0043] Specifically, in the illumination area IA, bright and dark areas alternate in the direction of illumination from the lighting device 3. In this embodiment, the bright and dark areas in illumination area IA include the first bright area L1, the first dark area D1, the second bright area L2, the second dark area D2, and the third bright area L3 in that order as you move away from the lighting device 3. Specifically, since the lighting device 3 emits illumination light downwards, the first bright area L1, the first dark area D1, the second bright area L2, the second dark area D2, and the third bright area L3 exist in that order as you move downwards.

[0044] The light and dark areas in the illumination area IA are created by intentionally utilizing the uneven structure of the seat back 200. In this embodiment, the light and dark areas in the illumination area IA are created by the pocket 220 provided in the seat back 200. Specifically, the upper end portion 221, which is the entrance portion of the pocket 220 provided in the seat back 200, is a protrusion that extends from the back surface 210, so the illumination light from the lighting device 3 is shone onto this upper end portion 221 (protrusion) of the pocket 220, creating the light and dark areas. In this case, the second bright area L2 in the illumination area IA is the area where the illumination light from the lighting device 3 is shone onto the upper end portion 221 (protrusion) of the pocket 220.

[0045] In this way, the illumination area IA, illuminated by the light from the lighting device 3, includes areas of light and dark (shadows), which effectively enhances the space inside the vehicle interior 2a. This effectively provides occupants seated in the rear seats 62 with a sense of style, luxury, or openness. Furthermore, it can also give occupants a rich sense of exhilaration.

[0046] Furthermore, in this embodiment, since the lighting device 3 is linear lighting, each of the first bright area L1, the first dark area D1, the second bright area L2, the second dark area D2, and the third bright area L3 is a strip-shaped area extending in the width direction of the sheet back 200. In this embodiment, the width of the first bright area L1 is the largest, but it is not limited to this.

[0047] As described above, the vehicle interior lighting system 1 according to this embodiment includes a lighting device 3 installed on the seat back 200 of the seat 60, and the lighting device 3 emits illumination light that lights up the back surface 210 of the seat back 200.

[0048] This allows the occupants to experience no glare while creating a pleasant environment within the vehicle compartment 2a.

[0049] Furthermore, the lighting device 3 may be dimmed. In other words, the brightness of the light emitted from the lighting device 3 may be changed. This can improve the lighting effect inside the vehicle compartment 2a.

[0050] Furthermore, the lighting device 3 may be not only dimmable but also color-controlled. This allows for changes not only in the brightness of the light emitted from the lighting device 3, but also in the color temperature of the light. This further enhances the lighting effect within the vehicle compartment 2a.

[0051] (modified version) The vehicle interior lighting system 1 according to the present invention has been described above based on embodiments, but the present invention is not limited to the above embodiments.

[0052] For example, as shown in Figure 5, the lighting device 3A may be configured to allow the irradiation angle of the illumination light to be changed. In this case, the lighting device 3A has an angle adjustment unit for adjusting the irradiation angle of the illumination light. The angle adjustment unit can, for example, change the direction of the light emitter 3a of the lighting device 3A manually or electrically. Note that the angle adjustment unit may be provided on the seat 60 instead of the lighting device 3A. In other words, the angle adjustment unit can be provided on the automobile 2 or the interior lighting system 1. By changing the irradiation angle of the illumination light in this way, the illumination light can be directed toward the rear seat 62. This allows the lighting device 3A to be used as task lighting for occupants seated in the rear seat 62.

[0053] Furthermore, in the above embodiment, the illumination area IA of the illumination light on the back surface 210 of the seat back 200 included a first bright area L1, a first dark area D1, a second bright area L2, a second dark area D2, and a third bright area L3 as bright and dark areas, but is not limited to this. For example, the bright and dark areas in the illumination area IA may include only the first bright area, the dark area, and the second bright area in that order as they move away from the illumination device 3. Also, in the above embodiment, the illumination area IA had bright and dark areas that alternated two or more times, but the illumination area IA may have bright and dark areas that alternated three or more times.

[0054] Furthermore, in the above embodiment, the light and dark areas (shadows) in the illumination area IA were created by the pocket 220 provided on the seat back 200, but this is not limited to this. For example, the light and dark areas (shadows) in the illumination area IA may be created by the shape of the back surface 210 of the seat back 200. Specifically, in a cross-section of the automobile 2 (vehicle), if the back surface 210 of the seat back 200 has at least one curved surface that is concave toward the front of the automobile 2, then the illumination light from the lighting device 3 may irradiate this curved surface of the seat back 200, creating light and dark areas (shadows) on the back surface 210 of the seat back 200. In the above embodiment, the uneven structure of the seat back 200 was intentionally utilized to create light and dark areas (shadows) in the illumination area IA, but the uneven structure of the seat back 200 may also be controlled from an optical perspective to create light and dark areas (shadows) in the illumination area IA.

[0055] Furthermore, although the lighting device 3 in the above embodiment was a long, linear lighting device, it is not limited to this. For example, the lighting device 3 may be a spot lighting device that emits a circular spot of light. In this case, the dark area and the dark area are arc-shaped band areas.

[0056] Furthermore, in the above embodiment, the lighting device 3 was installed in both the driver's seat 61a and the passenger seat 61b, but this is not limited to this. For example, the lighting device 3 may be installed in either the driver's seat 61a or the passenger seat 61b. Also, the lighting device 3 may be installed in the rear seat 62 instead of the front seat 61.

[0057] Furthermore, in the above embodiment, the lighting device 3 emitted illumination light toward the floor 20 side (downward), but this is not limited to this. For example, the lighting device 3 may emit illumination light toward the ceiling 10 side (upward). In other words, the lighting device 3 may be an uplight. In this case, the lighting device 3 is installed below the seat back 200.

[0058] Furthermore, although only a seat back light was described as the lighting device 3 installed in the automobile 2 in the above embodiment, other lighting devices may be installed in the automobile 2. For example, other lighting devices in the automobile 2 may include a front room light (front room lamp) and a rear room light (rear room lamp) installed in the center of the ceiling 10, ceiling side lights installed at the widthwise ends of the ceiling 10, pillar lights installed on the pillar trim 30, door trim lights installed on the door trim 40, a center console light installed on the center console, and footlights installed below the instrument panel. The illumination light emitted from these other lighting devices and the lighting device 3 which is the back seat light may be controlled in conjunction with each other.

[0059] Furthermore, in the above embodiment, the lighting device 3 was a glareless light configured so that the light-emitting part 3a was not visible to the occupants, but it is not limited to this. In other words, the lighting device 3 may be configured so that the light-emitting part 3a is visible to the occupants.

[0060] Furthermore, although the light source of the lighting device 3 in the above embodiment was an LED light source, it is not limited to this. For example, the light source of the lighting device 3 may be an existing light source such as a fluorescent lamp, xenon lamp, or halogen lamp. However, by using an LED light source for the lighting device 3, power consumption can be reduced, and the lighting device 3 can be lit with a DC power supply.

[0061] Furthermore, although the above embodiment uses automobile 2 as an example of a mobile body, it is not limited to this. Specifically, the mobile body may include vehicles other than automobiles, such as railway cars, as long as it has a passenger compartment.

[0062] Furthermore, the present invention also includes forms obtained by applying various modifications to the above embodiments and their respective modifications that a person skilled in the art could conceive, as well as forms realized by arbitrarily combining the components and functions of the above embodiments and their respective modifications without departing from the spirit of the present invention. In addition, the present invention also includes arbitrary combinations of one or more components from each of the multiple claims described in the claims of the present application. Furthermore, the present invention also includes all forms obtained by combining all the claims included in the multiple claims or multiple-multi-claims when the cited claims described in the claims of the present application are made into multiple claims or multiple-multi-claims that quote any multiple claims (for example, when each claim is made into a multiple claim or multiple-multi-claim that quotes all of the higher-level claims), in which case all forms obtained by combinations of all the claims included in that multiple claim or multiple-multi-claim are also included in the present invention. [Explanation of Symbols]

[0063] 1. Interior lighting system 2a cabin 3, 3A lighting device 20 floors 60 sheets 61 Front Seats 200 Seatback 210 Back 220 pockets 221 Upper end IA irradiation area L1 First Bright Area L2 Second Bright Area L3 Third Bright Area D1 Dark Zone 1 D2 Second Dark Area

Claims

1. The seats installed inside the vehicle's interior, The seat is equipped with a lighting device installed on the seat back, The lighting device emits illumination light that lights up the back of the seat back. Interior lighting system.

2. The illuminated area on the back surface to which the illumination light is shone includes areas of light and dark, The aforementioned light and dark regions include, in this order, a first light region, a dark region, and a second light region, as they move away from the illumination device. The vehicle interior lighting system according to claim 1.

3. The illuminated area on the back surface to which the illumination light is shone includes areas of light and dark, The aforementioned light and dark regions include, in this order, a first bright region, a first dark region, a second bright region, a second dark region, and a third bright region, as they move away from the illumination device. The vehicle interior lighting system according to claim 1.

4. A protrusion exists on the back of the aforementioned seat back, When the illumination light is shone on the protrusion, the light and dark regions are formed. The vehicle interior lighting system according to claim 2 or 3.

5. A protrusion exists on the back of the aforementioned seat back, The second bright area is the area where the illumination light shines on the convex portion. The vehicle interior lighting system according to claim 2 or 3.

6. The aforementioned protrusion is the upper end of the pocket provided on the seat back. The vehicle interior lighting system according to claim 5.

7. In the cross-section of the vehicle, the back of the seat back has at least one curved surface that is concave toward the front of the vehicle. When the illumination light is shone onto the curved surface, a shadow is cast on the back of the seat back. The vehicle interior lighting system according to claim 2 or 3.

8. The lighting device is a line light extending in the width direction of the vehicle. The vehicle interior lighting system according to any one of claims 1 to 3.

9. The lighting device irradiates the illumination light toward the floor side of the vehicle. The vehicle interior lighting system according to any one of claims 1 to 3.

10. The illumination light is projected onto the floor of the vehicle. The vehicle interior lighting system according to claim 9.

11. It has an angle adjustment unit for adjusting the irradiation angle of the illumination light, The vehicle interior lighting system according to any one of claims 1 to 3.

12. The aforementioned seat is the front seat. The vehicle interior lighting system according to any one of claims 1 to 3.

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