JP2001307518A - Lighting apparatus for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem that the conventional lighting apparatus for vehicle of this type has one kind of light source, and in switching the usage the brightness was changed only by changing the electric current value, which made the switching unclear and also has monotonicity from the design point of view. SOLUTION: This invention provides a lighting apparatus for vehicle 1 which consists of an incandescent lamp bulb 2, an elliptical reflecting surface for the incandescent light 3, an LED lamp 4, a first LED reflecting surface 5, a second LED reflecting surface 6, and a front lens 9 to which a lens cutting for incandescent light 9a is applied. The reflecting surface of the incandescent light 3 is formed by connecting plural ellipsoids of revolution which have the second focal points in the vicinity of a substrate 7. On the substrate 7 there are provided transmission holes 8 which correspond to respective second focal points, which enables to provide a quite different light emission pattern produced by the glare of the second LED reflecting surface 6, when an LED lamp 4 is switched on, from that of a lens cutting for incandescent light 9a, when an incandescent lamp 2 is switched on, and solves the problem by enabling of preventing mistake as well as improving its fine outlook by changing illumination pattern according to the usage.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicular lamp and, more particularly, to a tail lamp, a stop lamp, a turn signal lamp, etc., to notify other vehicles or pedestrians of the status and will of the own vehicle. The present invention relates to a configuration of a signal vehicle lamp used to perform the above operation.

[0002]

2. Description of the Related Art FIG. 6 shows an example of the structure of a conventional vehicle lamp 90 of this type. For example, a plurality of LED lamps 92 are arranged in a matrix on a plate-like substrate 91 such as a printed wiring board. And these LED lamps 92
Is provided from the viewing direction, and a front lens 93 is provided.

The front lens 93 is provided with a lens cut 93a having a convex spherical shape or the like corresponding to each of the LED lamps 92, so that the light emitted from the LED lamps 92 has an appropriate diffusion angle. The light distribution characteristics suitable for the purpose in which the vehicle lamp 90 is used, for example, for a tail lamp.

When the vehicular lamp 90 is a tail / stop lamp, a circuit for lighting the LED lamp 92 is designed so that the resistance value of the series resistor can be switched and used as a stop lamp. Is increased by increasing the current applied to the LED lamp 92 by decreasing the resistance value to increase the amount of light.

[0005]

However, in the vehicular lamp 90 having the above-mentioned conventional configuration, all the vehicular lamps 90 are formed in the same configuration, so that a design change will be given. In this case, there is only a means for changing the shape of the front lens 93, and the impression in the lit state is the same, and there is a problem that only a uniform impression is given.

Further, since the tail lamp function and the stop lamp function are performed only by the change in the light amount of the same LED lamp 92, the tail lamp or the stop lamp only in the light emitting state without changing the external appearance or the like. Judgment as to whether it is a ramp has to be made, and there is a problem that a driver with little experience may cause a false recognition, and solving these points has been an issue.

[0007]

According to the present invention, as a specific means for solving the above-mentioned conventional problems, there is provided an incandescent reflecting surface provided around an optical axis of an incandescent lamp, and an optical axis of the incandescent lamp. A substrate disposed on the LED lamp so that the LED lamp emits light substantially coaxially, and a first LED provided in front of the LED lamp and reflecting light from the LED lamp in a circumferential direction orthogonal to an optical axis. A reflective surface, a second LED reflective surface provided on the substrate, for reflecting light from the first LED reflective surface in an irradiation direction, and a front lens, wherein the incandescent reflective surface is a first incandescent lamp. A surface formed by connecting a part of a plurality of spheroids whose major axis is inclined so that the second focus is a focal point in the vicinity of the substrate and at an appropriate distance from the optical axis. Transmission corresponding to the second focus It solves the problem by providing a vehicle lamp, characterized in that is provided.

[0008]

Next, the present invention will be described in detail based on an embodiment shown in the drawings. 1 and FIG.
Is a vehicle lamp according to the present invention, the vehicle lamp 1 employs an incandescent lamp 2 and an LED lamp 4 as light sources, and the incandescent lamp 2 has an incandescent reflecting surface 3, The LED lamp 4 is provided with a first LED reflecting surface 5 and a second LED reflecting surface 6 respectively. In FIG. 2, the configuration related to the incandescent lamp 2 is mainly shown on the right side of the drawing, and the configuration related to the LED lamp 4 is mainly shown on the left side for easy understanding.

The LED lamp 4 is provided so that its axis coincides with the optical axis (center axis) X of the incandescent lamp 2. At this time, the light emission direction is the same as that of the front which substantially coincides with the optical axis X. In front of the incandescent lamp 2, the LE
For installing the D lamp 4 and the second LED reflecting surface 6,
For example, a substrate 7 formed of an opaque resin member is provided.

First, the structure of the LED lamp 4 will be described. As described above, the LED lamp 4 is mounted on the substrate 7 with the irradiation direction on the optical axis X being forward. Have been. A first LED reflecting surface 5 is provided so as to cover the LED lamp 4 from the front.

The first LED reflecting surface 5 is a curved surface obtained by rotating the substantially upper half of a parabola P having the LED lamp 4 as a focal point and the axis Y orthogonal to the optical axis X, about the optical axis X. The first LED reflecting surface 5 formed in this way reflects the light emitted from the LED lamp 4 in a radial direction as a disk having a thickness.

On the other hand, the second LED reflecting surface 6
Is provided on the substrate 7 so as to penetrate into the reflected light from the disc-shaped first LED reflecting surface 5 described above. In a direction parallel to the optical axis X.

Here, the second LED reflecting surface 6 has the first object of converting the light reflected by the first LED reflecting surface 5 into a direction parallel to the optical axis X. ,
For example, it may be formed in a ring shape equidistant from the optical axis X, but in this case, the apparent light emitting area is not so large.

Therefore, in the present invention, the disc-shaped light beam from the first LED reflecting surface 5 is radially split, and one second LED reflecting surface 6 is provided in one of the split ranges. The distance from the optical axis X is made freely, so that the degree of freedom in design can be increased (see FIG. 1), and the apparent light emitting area is also enlarged. The above-described division may be performed in the thickness direction of the disc-shaped light beam, or the radiation direction and the thickness direction may be combined.

In the above description, the description has been made assuming that the second LED reflecting surface 6 simply changes the traveling direction of light. However, in actual implementation, the light distribution characteristic of a tail lamp or the like is required. Therefore, for example, it is formed to have an appropriate convex spherical shape and appropriately diffuse. Further, since the substrate 7 is formed of a resin member, a reflection film 6a is formed on a portion to be used as the second LED reflection surface 6 by means such as vacuum deposition of aluminum and the reflection processing is performed.

Next, the incandescent reflecting surface 3 will be described. The incandescent reflecting surface 3 is basically formed as a spheroid having the incandescent lamp 2 as the first focal point f1. At this time, in this embodiment, the incandescent reflecting surface 3 is concentrically divided into, for example, four divisions, and radially divided, for example, into twelve divisions (48 in this embodiment).
Section 3a is formed.

The second focal point f2 is provided near the substrate 7 substantially corresponding to the center of each section 3a. Therefore, the longer the ellipse belongs to the outer concentric section 3a, the longer the major axis Z is the optical axis X. It is inclined from A portion corresponding to the section of the paraboloid of revolution obtained by rotating the ellipse O having the first focal point f1 and the second focal point f2 in this manner with the long axis Z as the rotation axis is cut and joined. The incandescent reflecting surface 3 of the present invention is configured, and in addition, a transmission hole 8 is provided in each of the positions of the substrate 7 where the second focal point f2 is provided.

The incandescent reflecting surface 3 configured as described above is
The light from the incandescent lamp 2 at the first focus f1 is reflected by the spheroids provided in the respective sections 3a, and the light converges to the corresponding second focus f2. And, since the transmission holes 8 are provided in the substrate 7 corresponding to the respective second focal points f2, the light passes through the transmission holes 8 in the irradiation direction.

The first LED reflecting surface 5, the second LED reflecting surface 6, and the transmission hole 8, in other words, the one provided to cover the substrate 7 is a front lens 9, and this front lens 9 is a transparent member made of resin or the like. It is formed with. An incandescent lens cut 9a for forming a light distribution characteristic is formed in front of the transmission hole 8.

In the case where the second LED reflecting surface 6 itself has a structure for forming light distribution characteristics, the front surface of the second LED reflecting surface 6 may be transparent and is not formed. In this case, an LED lens cut (not shown) may be provided in the same manner as in the case of the transmission hole 8 described above. Furthermore, it is also possible to provide a decorative cut on the front surface or a part of the front lens 9 so as not to affect the light distribution characteristics.

FIG. 3 shows a lighting state of the vehicular lamp 1 of the present invention having the above-described structure when used as a tail / stop lamp, and FIG. 3A shows an LED.
This shows a state in which only the lamp 4 is turned on and the lamp is used as a tail lamp. At this time, only the second LED reflecting surface 6 emits light.

FIG. 3B shows a state in which the incandescent lamp 2 is switched to the incandescent lamp 2 and is used as a stop lamp. The portion of the lens cut 9a emits light. Therefore, the light emission shape is clearly different between the case where it is used as a tail lamp and the case where it is used as a stop lamp.

At present, when the stop lamp is turned on, a lighting method in which the light source of the tail lamp is continued to be used is commonly used. However, the same lighting method is adopted in the vehicular lamp 1 of the present invention. In this case, both the second LED reflecting surface 6 and the incandescent lens cut 9a emit light.

As another function, the stop lamp is required to be brighter than the tail lamp in the related standards for this type of vehicle lamp, but the stop lamp is turned on by the incandescent bulb 2 having higher luminance. By that
The standard can be satisfied with one incandescent lamp 2, and the cost can be reduced.

FIG. 4 shows another embodiment of the present invention. In the previous embodiment, the substrate 7 was described as being formed of an opaque member, but the present invention is not limited to this. For example, when the vehicular lamp 1 of the present invention is used as a tail / stop lamp as described above, any emission color is required to be red (in the case of Japanese standard).

In this case, it is easy to use a red light emitting side on the LED lamp 4 side, but a coloring means for some lamp color is required on the incandescent lamp 2 side. Therefore, in this embodiment, the substrate 17 is formed of a transparent red member, and in addition, a light-shielding film 17a is formed of an opaque paint having a vehicle body color or the like from the front side except for the portion to be the transmission hole 8. A light-shielding process is performed. It is to be noted that the second LED reflecting surface 6 is the same as the previous embodiment in that a reflection process is performed.

In this way, when the incandescent bulb 2 and the LED lamp 4 are not lit, such as during the daytime, the light-shielding film 17a can be seen through the colorless and transparent front lens 9 and the vehicle lamp 1 can be seen. Almost the entire surface looks like the body color, so it is integrated with the body. Here, when the brake is operated, the incandescent lens cut 9a of the front lens 9 shines red and functions as a stop lamp, giving a novel impression to a following vehicle or the like.

A similar effect can also be obtained by covering the incandescent reflecting surface 3 with a red transparent coating 3a and coloring it. In this case, as shown in FIG. 5, the substrate 27 is made colorless and transparent, and the light shielding film 27a is made transparent. It may be provided on the back side of the substrate 27. Further, when it is desired to indicate the lamp color of the vehicular lamp 1 even when it is not lit, the front lens 9 may be formed of a colored member such as red.

[0029]

As described above, according to the present invention, an incandescent reflecting surface provided about the optical axis of an incandescent lamp;
A substrate disposed on the optical axis of the incandescent light bulb to place the LED lamp with the light emitting direction substantially coaxial, and provided in front of the LED lamp and reflecting light from the LED lamp in a circumferential direction orthogonal to the optical axis; A first LED reflecting surface, a second LED reflecting surface provided on the substrate for reflecting light from the first LED reflecting surface in an irradiation direction, and a front lens, wherein the incandescent reflecting surface focuses on an incandescent light bulb; The second focal point is a surface formed by connecting a part of a plurality of spheroids whose long axis is inclined near the substrate and at an appropriate distance from the optical axis, and the substrate corresponds to each second focal point. With the vehicle lamp provided with a transmission hole, the brightness of the second LED reflecting surface when the LED lamp is turned on is completely different from the brightness of the incandescent lens cut when the incandescent lamp is turned on. What can provide luminous shape , Also improved safety to prevent false positives in lamp used also two purposes, in addition as possible provide a novel design, in which exhibits an extremely excellent effect on the improvement of the performance improvement and aesthetics.

In addition, by adopting two types of light sources, an incandescent lamp and an LED lamp, and aiming the incandescent lamp to the application where high luminance is originally required, the number of lamps used can be reduced. A great effect is also achieved in reducing the cost of this type of lamp, which required a large number of LED lamps to obtain luminance and was expensive.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of a vehicular lamp according to the present invention in a partially broken state.

FIG. 2 is an explanatory view showing an embodiment of the vehicular lamp according to the present invention in a sectional state.

FIG. 3 is an explanatory diagram showing a lighting state of the vehicular lamp according to the present invention.

FIG. 4 is a cross-sectional view showing another embodiment of the vehicular lamp according to the present invention.

FIG. 5 is a cross-sectional view showing a main part of still another embodiment of the vehicular lamp according to the present invention.

FIG. 6 is a sectional view showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Vehicle lamp 2 ... Incandescent light bulb 3 ... Incandescent reflecting surface 3a ... Division 4 ... LED lamp 5 ... First LED reflecting surface 6 ... Second LED reflecting surface 6a ... Reflective film 7, 17: substrate 17a: light-shielding film 8: transmission hole 9: front lens 9a: incandescent lens cut

Claims (5)

[Claims] 1. An incandescent reflecting surface provided around an optical axis of an incandescent lamp, a substrate arranged on the optical axis of the incandescent lamp for installing an LED lamp with a light emitting direction substantially coaxial, and the LED. A first LED reflecting surface provided in front of the lamp and reflecting light from the LED lamp in a circumferential direction orthogonal to an optical axis; and the first LED provided on the substrate.
A second LED reflecting surface for reflecting light from the reflecting surface in the irradiation direction, and a front lens, wherein the incandescent reflecting surface has the incandescent lamp as a first focus, a second focus near the substrate, and the optical axis. A surface formed by connecting a part of a plurality of spheroids whose major axis is inclined so as to be an appropriate distance from the substrate, wherein the substrate is provided with a transmission hole corresponding to each of the second focal points. Vehicle lighting device characterized by the above-mentioned. 2. The vehicular lamp according to claim 1, wherein an incandescent lens cut is formed at a position corresponding to the transmission hole of the front lens. 3. The vehicular lamp according to claim 1, wherein the second LED reflecting surface is divided into at least one of a circumferential shape and a radial shape. 4. The substrate is formed of a light-transmitting member, and a reflection process and a light-shielding process are performed at appropriate positions to form the second LED reflection surface and the light transmission holes. The vehicular lamp according to any one of claims 1 to 3. 5. The vehicular lamp according to claim 1, wherein at least one of the front lens, the substrate, and the incandescent reflecting surface is provided with light coloring means.