JP2000331510A - Lighting system for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To effectively utilize light of a light source device as a heat ray or for camera lighting in addition to visual light by installing a heat ray conducting path wired between a light dividing means and a vehicle lighting lamp and conducting a heat ray from the light dividing means to the vehicle lighting lamp; and a radiator device for radiating the conducted heat ray to the outside. SOLUTION: When a light source is lit, light LIR, (LIL) is emitted to a light dimming lens 2 side. The light is divided into visual light VL and a heat ray IR with an IR reflecting filter 20, the visual light VL transmits the IR reflecting filter 20 and is incident on a light incident end 30, and the heat ray IR is reflected with the IR reflecting filter 20 and is incident on a heat ray incident end 50 of a heat pipe. Visual light VL is transmitted, outgoes in lamps 40, 41, 42 from a light outgoing end, and is irradiated to the outside in a specified light distribution pattern. The heat ray is incident in the heat pipe goes out to the radiator device from the heat ray outgoing end, and is emitted to lamp chambers of headlamps 40, 41. Then visual light VL and the heat ray IR are effectively utilized as a light source and a heat source respectively.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle lighting system for transmitting light from a light source device mounted on a vehicle to a predetermined position of the vehicle through a light transmission path and irradiating the light to the outside from the predetermined position of the vehicle. The present invention relates to a device, and more particularly to a vehicle lighting device that effectively utilizes light (light energy) from a light source device not only as visible light but also as a heat ray or a camera lighting ray.

[0002]

2. Description of the Related Art In general, a vehicle lighting device of this type is wired between a light source device mounted on a vehicle and a predetermined position of the vehicle, and transmits light from the light source device to the vehicle. A light transmission path for transmitting a predetermined position; and a vehicle illumination lamp disposed at a predetermined position of the vehicle and irradiating the light transmitted through the light transmission path to the outside. When the light source device is turned on, light from the light source device is transmitted to the vehicle lighting lamp at a predetermined position of the vehicle through the light transmission path,
Further, the light transmitted through the light transmission path is radiated from the vehicle lighting lamp to the outside. Examples of this type of vehicle lighting device include, for example, JP-A-5-81902, JP-A-6-48248, and JP-A-8-1951.
No. 03, JP-A-10-90506 and the like.

[0003]

SUMMARY OF THE INVENTION The present invention relates to an improvement of the above-mentioned lighting device for a vehicle, and an object of the present invention is to provide not only a visible light but also a heating light or a camera lighting light. Another object of the present invention is to provide a vehicle lighting device that can be effectively used.

[0004]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a light source device mounted on a vehicle, and converts the light generated in the light source device into a visible ray, a camera illumination ray or a heat ray. A light splitting means, a visible light transmission path which is wired between the light splitting means and a predetermined position of the vehicle, and transmits visible light from the light splitting means to a predetermined position of the vehicle; A vehicle illumination lamp that is arranged at a predetermined position and irradiates the visible light transmitted through the visible light transmission path to the outside, further comprising, between them, the light dividing means and a predetermined position of the vehicle. A camera illumination light transmission path that is wired and transmits a camera illumination light beam from the light dividing means to a predetermined position of the vehicle, and is disposed at a predetermined position of the vehicle and is transmitted through the camera illumination light transmission path. Camera lighting beam A lamp for camera illumination that irradiates the vehicle illumination unit, and / or the light distribution unit and a predetermined position of the vehicle illumination lamp and / or the camera illumination lamp, and heat rays from the light distribution unit to the vehicle illumination A heating wire conduction path that conducts to a predetermined position of the lamp for camera and / or the lamp for camera illumination, and a heating wire that is disposed at a predetermined position of the lamp for vehicle illumination and / or the lamp for camera illumination and externally transmits the heat ray transmitted through the heating wire conduction path. And a radiator for discharging the radiator.

As a result, the vehicle lighting device of the present invention can effectively use the light of the light source device as not only visible light but also heat rays or light for camera illumination. That is, of the light of the light source device, visible light is used as a light source for illuminating a predetermined position of the vehicle, and heat rays are used for a vehicle illumination lamp and / or a camera illumination lamp (these lamps are arranged at positions away from the light source). (It is difficult to obtain heat from the light source, so it is easy to cloud or snow), and it is used as a heat source to prevent cloud and snow from being removed. It is used as a light source for lighting at the time.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, three embodiments of a vehicle lighting device according to the present invention will be described with reference to the accompanying drawings.
1 to 3 show a first embodiment (an embodiment of the invention according to claim 1) of a vehicle lighting device of the present invention. In the drawings, the right part of the vehicle lighting device excluding the light source device is illustrated.

In FIG. 1, reference numeral 1 denotes one light source device mounted on a vehicle (not shown, but in this example, an automobile). This light source device 1 has a hollow casing 10.
The right reflection surface 11R and the left reflection surface 11L provided on the inner surface of the casing 10, respectively, one light source 12 disposed in the casing 10, the right reflection surface 11R, and the left reflection surface 11L. It is composed of a right light projecting port 13R and a left light projecting port 13L (for example, a circular shape) provided respectively.

The right reflecting surface 11R and the left reflecting surface 11L are concave reflecting surfaces, and the first focal point F1 is located at a common point substantially at the center of the casing 10 (or 1 point).
(Near the point) and the right second focus F2
R and the left second focal point F2L are constituted by a part of a spheroidal surface located in the vicinity of the right light projecting port 13R and the left light projecting port 13L, respectively. This reflection surface 11R, 11L
Has the optical axis ZZ as the rotation axis. The reflecting surfaces 11R and 11L are formed of a plurality of spheroids in which the second focal points F2R and F2L are located on the optical axis ZZ in addition to the spheroids described above. The first focus F1 and the second focus F2
In some cases, R and F2L are each composed of a plurality of free-form surfaces located at a plurality of positions.

The one light source 12 is a discharge lamp (for example,
A high-pressure metal vapor discharge lamp such as a metal halide lamp, a high-intensity discharge lamp (HID) or the like, or a halogen lamp, etc., in the major axis direction (optical axis Z) of the right reflection surface 11R and the left reflection surface 11L. -Z direction) and in the horizontal direction (so-called horizontal placement).
The light emitting portion of the discharge lamp 12 is disposed at the common first focal point F1 (or near the common first focal point F1) of the right reflecting surface 11R and the left reflecting surface 11L.

In the light source device 1 described above, when the light source 12 is turned on, the light L1 from the light source 12 is reflected by the right reflecting surface 11R and the left reflecting surface 11L, and the reflected light L1L, L1R
Are concentrated on the left light projecting port 13L and the right light projecting port 13R, and are projected outside from the left light projecting port 13L and the right light projecting port 13R.

In FIG. 1, reference numeral 2 denotes a dimming lens (collimator lens) which is disposed to face the light projecting openings 13R and 13L of the light source device 1, and which emits light L1R projected from the light projecting openings 13R and 13L. , L1L as parallel light parallel to the optical axis ZZ). In the drawing, reference numeral 20 denotes light L1R and L1L from the light source device 1 as visible light VL and heat ray I.
This is a light dividing means for dividing the light into R light. In this example, the light dividing means 20 transmits the visible light VL in the direction of the optical axis ZZ, and transmits the heat ray IR to the axis Z′- orthogonal to the optical axis ZZ.
An IR reflection filter (cold filter) that reflects light in the Z 'direction is used. The IR reflection filter 20 is arranged so as to be inclined at an angle of 45 ° with respect to the optical axis Z-Z and the optical axis orthogonal axis Z'-Z '.

In FIG. 1, reference numeral 3 denotes a light guide as a visible light transmission path which is wired between the IR reflection filter 20 and a vehicle illumination lamp described later. The light guide 3 has one light entrance end 30 and three light exit ends 31 and 32.
(Note that two light emitting ends are shown in the drawings). The light incident end 30 is connected to the IR reflection filter 2.
0, and orthogonal to the optical axis Z-Z, while the light emitting ends 31, 32 are located at predetermined positions of vehicle lighting lamps 40, 41, 42 described later. Are located in The light guide 3 receives the visible light VL from the IR reflection filter 20 at a light incident end 30 and transmits the visible light VL to the light output end 3.
The light is transmitted to the light emitting ends 1 and 32 and emitted from the light emitting ends 31 and 32 to vehicle lighting lamps 40, 41 and 42, which will be described later. As the light guide 3, for example,
-81902, JP-A-6-48248, JP-A-8-195103, JP-A-10-90506
Patent No. 5,047,098, which is composed of optical fibers formed by stretching, etc., composed of rod-shaped optical fibers formed by extrusion molding, etc. In which a resin material is formed into a predetermined shape by injection molding (Japanese Patent Application No.
No. -311086).

In FIG. 1, reference numerals 40, 41, and 42 denote vehicle illumination lamps arranged at predetermined positions of the vehicle. In this example, a headlamp 40 for traveling and a headlamp 41 for passing are provided on both left and right sides of the front part of the vehicle.
And a turn lamp (auxiliary headlight) or a turn signal lamp (hereinafter simply referred to as a turn signal lamp) 4
And 2. Each of the above lamps 40, 41,
A lamp chamber 42 is defined by a lamp housing and an outer lens (omitted in the drawing). The interior surface of the lamp room is subjected to decorative processing such as aluminum deposition and aluminum painting (silver painting). In this lamp room, optical devices 400 and 410 are provided to face the light emitting ends 31 and 32 of the light guide 3. The illustration of the optical device of the turn signal lamp 42 is omitted. The light distribution control of each of the lamps 40, 41, 42 is as follows.
This is performed using the optical devices 400 and 410 or the outer lens. The optical devices 400 and 410 or the outer lens may be transparent when the light distribution control is not performed. In each of the lamps 40, 41, and 42, the lamp housing and lamp chamber other than the optical devices 400 and 410 that contribute to light distribution control contribute to decoration (design).

In FIG. 1, reference numeral 5 denotes a heat pipe as a heat conducting path which is wired between the IR reflection filter 20, the head lamps 40, 41, and the turn signal lamp 42. The heat pipe 5 is, for example, a general heat pipe made of a copper alloy or the like, and has one heat ray input end 50 and two heat ray output ends 51 and 52, respectively. The heat ray incident end 50 faces the IR reflection filter 20 and is disposed orthogonal to the optical axis orthogonal axis Z′-Z ′, while the heat ray exit ends 51 and 52 are The lamps are arranged at predetermined positions of the head lamps 40 and 41, and are provided with irregularities to increase the surface area. The heat pipe 5 receives the heat ray IR from the IR reflection filter 20 at a heat ray incident end 50, and transmits the incident heat ray IR to the heat ray output ends 51, 52 to transmit the heat ray IR from the heat ray output ends 51, 52. The light is emitted to radiators 60 and 61 described later.

In the figures, radiators 60 and 61 are arranged at predetermined positions of the headlamps 40 and 41. The radiators 60 and 61 discharge the heat rays transmitted through the heat pipe 5 to the outside, that is, into the lamp chambers of the headlamps 40 and 41. The radiators 60 and 61 of this example
Are provided above the lamp chambers of the headlamps 40 and 41.

In addition, a light control lens 2, an IR reflection filter 20, a light guide 3, and lamps 40, 41, 42 shown in FIGS.
The same components as the heat pipe 5 and the radiators 60 and 61 are arranged and wired.

The vehicle lighting device according to the present invention in this embodiment has the above-described configuration, and its operation will be described below. First, when the light source 12 of the light source device 1 is turned on, the light L1R, L1L is emitted from the light emitting openings 13R,
The light is emitted from 3L to the light control lens 2 side. This light L1R,
L1L is divided into visible light VL and heat ray IR by the IR reflection filter 20, and the visible light VL passes through the IR reflection filter 20 and is incident on the light incident end 30 of the light guide 3, while the heat ray IR is The light is reflected by the IR reflection filter 20 and enters the heat ray incident end 50 of the heat pipe 5.

The visible light VL incident on the light entrance end 30 of the light guide 3 is transmitted to the light exit ends 31 and 32 of the light guide 3.
From each of the light emitting ends 31 and 32 to each lamp 4
0, 41, and 42, and these lamps 40, 41, 4
2 to the outside in a predetermined light distribution pattern.

On the other hand, the heat ray IR incident on the heat ray incident end 50 of the heat pipe 5 is
The heat rays 1 and 52 are transmitted to the radiators 60 and 61 from the heat radiation emitting ends 51 and 52, and are emitted from the radiators 60 and 61 into the lamp chambers of the head lamps 40 and 41. Head lamps 40, 41 (these head lamps 40, 41
Is located at a position distant from the light source device 1 and it is difficult to obtain the heat of the light source 12 of the light source device 1, so it is easy to fog or snow. The fogging on the inner surface of the outer lenses 40 and 41 and the snow attached to the outer surface can be removed.

As described above, the vehicle lighting device of the present invention according to this embodiment includes the lights L1R and L1L of the light source device 1.
Can be effectively used not only as the visible light VL but also as the heat ray IR. That is, the light L1 of the light source device 1
Of the R and L1L, the visible light VL is transmitted through the light guide 3 to the head lamps 40 and 41, the turn signal lamp 4
The heat ray IR is used as a heat source for heating the headlamps 40 and 41 via the heat pipe 5. For this reason, the vehicle lighting device of the present invention in this embodiment is a conventional vehicle lighting device (which simply transmits the light of the light source device by a light guide. The light energy can be used more effectively as compared to the case where the heat rays of the light are attenuated and are not effectively used.

FIGS. 4 and 5 are partial perspective views showing modified examples of the radiator in the first embodiment. FIG.
Radiators 62 and 63 are optical devices 400 and 410
And the upper part of the headlights 40 and 41 in the lighting room. On the other hand, the radiators 64 and 65 of FIG.
Is provided around the optical devices 400 and 410. The positions where the radiators 60 to 65 are provided are as follows.
There is no particular limitation.

FIG. 6 shows a second embodiment (one embodiment of the invention according to claim 2) of a vehicle lighting device of the present invention. In the drawing, the same reference numerals as those in FIGS. 1 to 5 denote the same components. In the figure, RC is a rear combination lamp arranged and mounted on the left and right sides of the rear of the vehicle. The rear combination lamp RC includes a tail stop lamp 43 that emits red light, a turn signal lamp 44 that emits amber light, and a backup 45 that emits white light.
And are combined from. At predetermined positions of the respective lamps 43, 44, 45 of the rear combination lamp RC, light emitting ends (not shown) of the light guide 3 are arranged.

In FIG. 1, reference numeral 7 denotes a camera for photographing information behind the automobile, in this example a CCD camera. This C
The CD camera 7 has the rear combination lamp R
Built in C. Information on the rear of the automobile taken by the CCD camera 7 is provided as a camera image via a CCD harness 70 as a monitor image (not shown, for example, built in a room rear-view mirror device). (LCD display device).

In the figure, reference numeral 21 denotes an IR reflection filter 20.
This is an optical filter arranged so as to face the heat ray IR reflection surface. The optical filter 21 is disposed orthogonal to the optical axis orthogonal axis Z′-Z ′, and is a heat ray IR separated from the visible light VL among the light L1R and L1L from the light source device 1. Of the heat rays IR, light having a wavelength suitable for the sensitivity of the CCD camera 7, that is, the camera illumination light beam CL
And cuts light of other wavelengths, that is, unnecessary light.

In the figure, reference numeral 8 denotes a light guide as a light transmission path for camera illumination, which is wired between the optical filter 21 and a predetermined position of the rear combination lamp RC. The camera illumination light guide 8 has the same configuration as that of the vehicle illumination light guide 3 that transmits the visible light VL, and has one light entrance end 80 and one light exit end (not shown). ) Respectively. Light incident end 8
0 is disposed so as to face the optical filter 21 and to be orthogonal to the optical axis orthogonal axis Z′-Z ′.
At a predetermined position. The camera illumination light guide 8 receives the camera illumination light beam CL from the optical filter 21 at a light incident end 80, and transmits the incident camera illumination light beam CL to a light emission end to emit the light. The light is emitted from the end to a camera illumination lamp 9 described later.

In the drawing, reference numeral 9 denotes a camera illumination lamp arranged adjacent to the CCD camera 7 at a predetermined position of the rear combination lamp RC. The camera illumination lamp 9 irradiates the camera illumination light beam CL transmitted by the camera illumination light guide 8 to the outside.

A light control lens 2 and an IR reflection filter 20 shown in FIG.
Optical filter 21, light guide 3, rear combination lamp RC, CCD camera 7, CCD harness 7
0, a camera illumination light guide 8 and a camera illumination lamp 9 are arranged and wired. Also, CCD
The arrangement positions of the camera 7 and the camera illumination lamp 9 are not particularly limited.

Since the vehicle lighting device of the present invention in the second embodiment has the above-described configuration, the same functions and effects as those of the first embodiment can be achieved. In particular, according to the second embodiment, the light L1R, L1L of the light source device 1 can be effectively used not only as the visible light VL but also as the camera illumination light CL. That is, of the light L1R and L1L of the light source device 1,
Since the camera illumination light beam CL is used as a light source of the camera illumination lamp 9 via the camera illumination light guide 8, light energy can be effectively used.

FIG. 7 shows a third embodiment (an embodiment of the third aspect of the present invention) of a vehicle lighting device according to the present invention. In the drawing, the same reference numerals as those in FIGS. 1 to 6 denote the same components. In the figure, reference numeral 22 denotes a heat filter arranged between the IR reflection filter 20 and the optical filter 21. This heat filter 22
Is 45 with respect to the optical axis Z-Z and the optical axis orthogonal axis Z'-Z '.
° light L from the light source device 1
Heat rays I separated from visible light VL among 1R and L1L
R, which reflects light having a wavelength of a heat component of the heat rays IR, that is, heat rays HL, and transmits light SL having other wavelengths.

Here, the heat ray incident end 50 of the heat pipe 5
Are arranged so as to face the heat filter 22, and the heat ray emission end of the heat pipe 5 is arranged so as to face the radiator 66. The radiator 66 is provided with the CCD camera 7
And around the camera illumination lamp 9, CC
Prevents the D camera 7 and the camera illumination lamp 9 from fogging and snow. On the other hand, the optical filter 21 transmits light having a wavelength suitable for the sensitivity of the CCD camera 7, that is, light CL for camera illumination, of light SL having other wavelengths transmitted through the heat filter 22, and light having other wavelengths. That is, unnecessary light is cut off.

The light control lens 2, the IR reflection filter 20, and the light control lens 2 shown in FIG.
Light filter 21, heat filter 22, light guide 3, rear combination lamp RC, heat pipe 5, radiator 66, CCD camera 7, CCD harness 70, camera illumination light guide 8, and camera illumination lamp 9 are the same. Arranged and wired.

Since the vehicle lighting device of the present invention according to the third embodiment has the above-described configuration, the same operation and effect as those of the above-described first and second embodiments are achieved. can do. In particular, in the third embodiment, the light L1R and L1L of the light source device 1 can be effectively used not only as the visible light VL but also as the heat light HL and the light CL for camera illumination. It can be used effectively.

In the above embodiment, the head lamps 40 and 41, the turn signal lamp 42, the rear combination lamp RC, the camera illumination lamp 9,
Although an example in which the present invention is used for a vehicle lighting device such as the radiators 60 to 66 has been described, the vehicle lighting device of the present invention can also be applied to other lamps, for example, interior lights.

[0034]

As described above, the vehicle lighting device of the present invention can effectively use the light of the light source device not only as visible light but also as heat rays or light for camera illumination. That is, of the light of the light source device, the visible light is used as a light source for illuminating a predetermined position of the vehicle, and the heat ray is used as a heat source for heating a vehicle lighting lamp and / or a camera lighting lamp to prevent clouding and snow accumulation and prevent removal. The camera illumination light beam is used as a light source for illumination when the camera captures information on a predetermined position of the vehicle. For this reason, effective use of light energy is achieved.

[Brief description of the drawings]

FIG. 1 is a perspective view schematically showing a first embodiment of a vehicle lighting device according to the present invention.

FIG. 2 is a longitudinal sectional view of the light source device.

FIG. 3 is a perspective view of a head lamp and a turn signal lamp.

FIG. 4 is a perspective view of a headlamp and a turn signal lamp showing a modification of the radiator.

FIG. 5 is a perspective view of a headlamp and a turn signal lamp showing a modification of the radiator.

FIG. 6 is a perspective view schematically showing a second embodiment of the vehicle lighting device of the present invention.

FIG. 7 is a perspective view schematically showing a third embodiment of the vehicle lighting device of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Light source device, 10 ... Casing, 11R ... Right reflection surface, 11L ... Left reflection surface, 12 ... One light source, 13R ...
Right light projector, 13L Left light projector, F1 Common first focus, F2R Right second focus, F2L Left second focus, Z
-Z: Optical axis, Z'-Z ': Optical axis orthogonal axis, L1, L1R,
L1R: light, VL: visible light, IR: heat ray, CL: light for camera illumination, HL: heat ray, SL: other rays, 2
... dimming lens, 20 ... IR reflection filter (light dividing means),
21: optical filter (light dividing means), 22: heat filter (light dividing means), 3: light guide (visible light transmission path), 30
... Entrance end, 31, 32 ... Emission end, 40, 41 ... Head lamp, 42 ... Turn signal lamp, 43 ... Tail stop lamp, 44 ... Turn signal lamp, 45 ... Backup lamp, 5 ... Heat pipe (hot wire electric path) , 5
0: Heat ray incident end, 51, 52: Heat ray exit end, 60 to 66
... radiator, 7 ... CCD camera, 70 ... CCD harness,
8: Light guide for camera illumination (light transmission path for camera illumination), 80: Light incident end, 9 Lamp for camera illumination.

Claims (3)

[Claims] A light source device mounted on a vehicle; a light splitting unit for splitting light generated in the light source device into a visible ray and a heat ray; and a wire wired between the light splitting unit and a predetermined position of the vehicle. ,
A visible light transmission path for transmitting the visible light from the light dividing means to a predetermined position of the vehicle; and a vehicle illumination disposed at a predetermined position of the vehicle and irradiating the visible light transmitted by the visible light transmission path to the outside. A heating wire, which is wired between the light dividing means and a predetermined position of the vehicle lighting lamp, and which conducts a heat ray from the light dividing means to a predetermined position of the vehicle lighting lamp; A radiator disposed at a predetermined position of a lighting lamp and configured to radiate a heat ray transmitted through the heat ray conduction path to the outside. 2. A light source device mounted on a vehicle; a light splitting unit that splits light generated in the light source device into a visible light beam and a light beam for camera illumination; and between the light splitting unit and a predetermined position of the vehicle. Is wired to
A visible light transmission path for transmitting the visible light from the light dividing means to a predetermined position of the vehicle, and a vehicle illumination disposed at a predetermined position of the vehicle and irradiating the visible light transmitted by the visible light transmission path to the outside. And a lamp for wiring between the light splitting means and a predetermined position of the vehicle,
A camera illumination light transmission path for transmitting a camera illumination light beam from the light dividing means to a predetermined position of the vehicle; and a camera illumination light transmission path arranged at the predetermined position of the vehicle and transmitted through the camera illumination light transmission path. A lighting device for a vehicle, comprising: a camera lighting lamp for irradiating a light beam to the outside. 3. A light source device mounted on a vehicle; a light splitting unit for splitting light generated in the light source device into a visible ray, a camera illumination light ray, and a heat ray; and the light splitting means and a predetermined position of the vehicle. Wired between
A visible light transmission path for transmitting the visible light from the light dividing means to a predetermined position of the vehicle, and a vehicle illumination disposed at a predetermined position of the vehicle and irradiating the visible light transmitted by the visible light transmission path to the outside. And a lamp for wiring between the light splitting means and a predetermined position of the vehicle,
A camera illumination light transmission path for transmitting a camera illumination light beam from the light dividing means to a predetermined position of the vehicle; and a camera illumination light transmission path arranged at the predetermined position of the vehicle and transmitted through the camera illumination light transmission path. A camera lighting lamp for irradiating a light beam to the outside; and a wire between the light dividing means and a predetermined position of the vehicle lighting lamp and / or the camera lighting lamp. A heating wire conduction path that conducts to a predetermined position of the camera lamp and / or the camera illumination lamp; and a heat radiation path that is disposed at a predetermined position of the vehicle illumination lamp and / or the camera illumination lamp and that conducts the heat radiation conducted by the heat ray conduction path to the outside. A vehicle lighting device comprising: a radiator that emits light to a vehicle.