JPH0589703A - Vehicle lighting fixture - Google Patents

Abstract

(57) [Abstract] [Purpose] A vehicular lamp using a light emitting diode as a light source, which has a small depth and can secure a large light emitting area by not so many light emitting diodes, and a part of which goes around the side of the vehicle. Providing vehicle lighting that can be easily applied to A lamp chamber space is formed by a rectangular container-shaped lamp body 10 and a rectangular outer lens 14 attached to a front opening of the lamp body 10, and a light emitting diode 22 as a light source is formed in the lamp chamber space. In a vehicle lamp in which a large number of light emitting diodes 22 are provided and the inner lens 16 is provided between the light emitting diode 22 and the outer lens 14, the light emitting diode 22 is provided in the inner lens 16 corresponding to the light emission direction.
Inner lens 16 to guide light to the full width
And the side walls 12a and 12b of the ramp body which are inclined with respect to
Are arranged in series along the inner lens 16
A prism step 17 is formed on the back side of the light emitting diode 22 so as to convert the light guided from the light emitting diode 22 into substantially parallel light and to guide the light forward.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicular lamp using a light emitting diode as a light source.

[0002]

2. Description of the Related Art As a conventional lamp of this type, as shown in FIG. 11, a light emitting diode 4 supported by a printed circuit board 3 is provided in a lamp chamber space formed by a lamp body 1 and an outer lens 2. Has a structure that is arranged in rows and columns. Reference numeral 5 is an inner lens provided on the back side of the outer lens 2, and a collimator lens step 6 corresponding to the light emitting diode 4 is provided on the back surface of the inner lens 5.
And a diffusion step 7 is formed on the surface of the inner lens 2. Then, as shown by the arrow in the figure, the functional color direct light emitted from the light emitting diode 4 is collimated by the collimator lens step 6,
The diffused light is distributed by the diffusion step 7.

[0003]

However, the above-mentioned conventional lamp has the following problems. First, since the light emitting diode 4 is arranged so that the optical axis L is perpendicular to the lenses 2 and 5, the depth of the lamp becomes large. Further, since the light emitting diode 4 has directivity and is arranged so as to be perpendicular to the lenses 2 and 5,
The light emitting area of the lens capable of emitting light by one light emitting diode is small, and a large number of light emitting diodes are required to uniformly emit light over the entire light emitting surface of the lens, resulting in high power consumption and high cost.

Further, since it is difficult to form the light emitting diode supporting surface of the printed circuit board 3 into a curved shape, the light emitting surface of the lens is on the back side like a lamp having a part of the printed circuit board 3 wrapping around to the side of the vehicle. It is difficult to form a curved lamp.
The present invention has been made in view of the above problems of the prior art,
Its purpose is a vehicular lamp using a light emitting diode as a light source, which has a small depth and can secure a large light emitting area by not so many light emitting diodes, and can be easily applied to a lamp part of which goes around the side of the vehicle. It is to provide a lighting device for a vehicle.

[0005]

In order to achieve the above object, in a vehicular lamp according to a first aspect of the present invention, there is provided a lamp body having a rectangular container shape and a rectangular shape attached to a front opening portion of the lamp body. A lamp chamber space is formed by an outer lens, a large number of light emitting diodes that are light sources are provided in the lamp chamber space, and in a vehicle lamp in which an inner lens is provided between the light emitting diode and the outer lens, the light emitting diode is , The light is guided from the light emitting diode to the back side of the inner lens while being inclined with respect to the inner lens so as to guide the light to the entire width of the inner lens and arranged in series along the side wall of the lamp body. A prism step for converting the reflected light into substantially parallel light and leading the light forward is formed.

According to a second aspect of the present invention, in the lighting device according to the first aspect, a reflecting surface is formed on the back side of the light emitting diode in the lamp chamber space. In claim 3,
The lamp according to claim 1, wherein the outer lens and the inner lens are transparent, and the light emitting diode itself emits a functional color, and the function color different from the functional color emitted by the light emitting diode is provided at a predetermined position on the back side of the inner lens. A light source means for forming colored light is provided.

[0007]

[Function] Since the light emitting diodes are arranged obliquely with respect to the inner lens and along the side wall of the lamp body,
The number of light emitting diodes for the light emitting surface of the lens is small,
Moreover, the depth of the lamp can be reduced. Further, a prism step formed on the back surface of the inner lens makes the light transmitted through the inner lens parallel and smooth, and guides a uniform amount of light to the entire light emitting surface of the outer lens. Further, since the light emitting diodes are obliquely (substantially parallel) to the inner lens and are arranged in series along the side wall of the lamp body, the side edge of the printed circuit board supporting the light emitting diode follows the side wall of the lamp body. It may be formed in a shape.

In the second aspect, the amount of light emitted from the outer lens is increased by the light reflected by the reflecting surface. According to a third aspect of the present invention, there is provided a lamp in which a lamp having a light emitting diode as a light source and emitting one functional color and a lamp having another light source means as a light source and emitting a functional color different from the functional color are integrated. ..

[0009]

Embodiments of the present invention will now be described with reference to the drawings. 1 and 2 show a first embodiment of the present invention. FIG. 1 is an exploded perspective view of a rear combination lamp which is an embodiment of the present invention, and FIG. 2 is a vertical sectional view of the lamp.

In these drawings, reference numeral 10 is a lamp body in the shape of a horizontally long rectangular container in a front view, in which the left side portion (the left side portion when viewed from the front) wraps around to the back side. The transparent (clear) outer lens 14 of is attached to the front opening of the lamp body 10,
A lamp chamber space is formed in which the left side region is curved to the back side. A vertical shade 11 is formed on the lamp body 10 to define a lamp room space A for a tail and stop lamp and a lamp room space B for a turn signal lamp.

Upper and lower side walls 12a, 1 of the lamp body 10
Inside the 2b, a printed circuit board 20 whose side edges follow the curved shapes of the upper and lower side walls 12a, 12b is arranged. The printed circuit boards 20, 20 are provided with light emitting diodes 22 as light sources at regular intervals. Are arranged in series.
The light emitting diode 22 corresponding to the lamp room space A emits red light which is the function color of the tail and stop lamp, while the light emitting diode 22 corresponding to the lamp room space B emits light of the amber color which is the function color of the turn signal lamp. It is like this. On the back side of the outer lens 14, an inner lens 16 having a shape following the curved shape of the outer lens 14 is formed.
(16A, 16B) are arranged. The optical axis L of the light emitting diode 22 is inclined 5 to 8 degrees with respect to the inner lens 16 so that the light of the light emitting diode 22 is guided over the entire width of the step forming region of the inner lens. Further, the back wall of the lamp body 10 is formed as an inclined surface parallel to the optical axis L of the light emitting diode 22, and a light reflection surface 19 which is vapor-deposited with aluminum for increasing the illumination effect is formed inside the back wall. .. That is, on the back side of the inner lens 16 (16A, 16B), prism steps 1 in which horizontally extending rectangular grooves are continuous at a constant pitch in the vertical direction
7 is formed, and the direct light from the light emitting diode 22 (shown by the solid line in FIG. 1) and the light reflected by the aluminum vapor deposition surface 19 (shown by the broken line in FIG. 1) are adjusted in this step 17 to form parallel light. Then, the light is guided to the outer lens 14 and diffused and distributed forward by the fisheye step 15 formed on the back side of the outer lens 14.

In order for the entire surface of the outer lens 14 to emit light uniformly, the inclination angle θ of the light emitting diode 22 is 5 degrees.
It is desirable that the inclination angle is θ to 8 degrees.
Is 8 degrees or more, the amount of light in the substantially central portion in the vertical direction of the outer lens 14 can be made smaller than that in the upper and lower side edge regions to form a horizontal striped gradation pattern. Particularly, in this embodiment, since the light reflecting surface 19 is formed on the inner side of the back wall of the lamp body 10, the outer lens 14 has an unprecedented depth feeling that it seems that there are a plurality of light emitting sources in the front-rear direction. can get.

FIG. 3 is a vertical cross-sectional view of a rear combination lamp which is a second embodiment of the present invention and corresponds to FIG. In the first embodiment described above, the lamp body 10
A light reflecting surface 19 which is aluminum vapor-deposited is formed on the inside to effectively utilize the reflected light from the light reflecting surface 19. In this embodiment, the light emitted from the light emitting diode 22 is collimated by the collimator lens 24. Then, the light is made incident on the inner lens 16, and the outer lens 14 is caused to emit light mainly by the direct light of the light emitting diode 22.

Further, in the above embodiment, the light emitting diode 2 is provided on the back side of the front frame regions 13a and 13b above and below the lamp body.
2 is arranged (see FIG. 2), but in the present embodiment, the light emitting diode 22 is located on the back side of the lenses 14 and 16 so that the light of the upper light emitting diode 22 is the inner lens 1
6 is led to the lower half region, and the lower light emitting diode 22
Light is guided to the upper half region of the inner lens 16, and the upper and lower front frame regions 13 a, 1 of the lamp body 10 are
By omitting 3b, the vertical height of the lamp is reduced. That is, it is a compact lamp with a vertical width.

FIGS. 4 and 5 show a third embodiment of the present invention. FIG. 4 is an exploded perspective view of a rear combination lamp, and FIG. 5 is a vertical sectional view of the lamp at a turn signal lamp position. .. In these drawings, a single inner lens 16C having a shape that follows the curved shape of the outer lens 14 is arranged in the lamp chamber space formed by the lamp body 10 and the outer lens 14.
Then, the right end portion of the rear wall of the lamp body bulges to the rear side, and the lamp body 10a for the backup lamp is located here.
On the other hand, the left end portion of the rear wall of the lamp body bulges toward the rear side to form the lamp body 10b for the turn signal lamp. Lamp body 10
Incandescent bulbs 30a and 30b are attached to a and 10b, a prism lens 33 is arranged, and a filter lens 32 having a functional color is provided on the back side of the prism lens 33 on the lamp body 10b side. Then, the light of the bulb 30b is reflected by the parabolic reflector 10b ₁ formed inside the lamp body 10b as shown by the arrow in FIG. In addition to having an amber color, the light is refracted in the vertical direction by the prism step 34 formed on the surface of the prism lens 33 and enters the inner lens 16. The light refracted and made parallel by the prism step 17 of the inner lens 16 is diffused and distributed by the fisheye step 15 of the outer lens 14. The backup lamp, which preferably has white light, has the same structure as the lamp shown in FIG. 5 except that the filter lens 32 is not provided, and a description thereof will be omitted.

FIG. 6 shows a sectional view of the essential parts of a fourth embodiment of the present invention, and is a drawing corresponding to FIG. Figure 5 above
In the structure shown in (1), the prism lens 33 is removed, and the lens step 17 of the inner lens 16 is replaced with a thinning step 37. Thinning step 3
As shown in an enlarged view in FIG. 7, 7 is a shape in which non-step regions 37a and prism steps 37b are alternately continuous in the vertical direction, and the parallel light guided from the reflector 10b ₁ is transmitted through the non-step region 37a. The light that has passed through the collimator lens 24 and becomes parallel light from the light emitting diode 22 enters the prism lens 37, and then is reflected by the prism step 37b and becomes parallel light that is emitted forward. It has the property of transmitting both lights.

In FIG. 6 described above, the inner lens 1
Although the thinning step 37 is formed over the entire back surface of 6, the thinning step 37 may be formed only in the region corresponding to the turn signal lamp without forming the thinning step 37 over the entire inner lens.

8 and 9 show a fifth embodiment of the present invention. FIG. 8 is an exploded perspective view of a rear combination lamp, and FIG. 9 is a longitudinal sectional view of the same lamp. In the lamp room space of the tail-and-stop lamp formed by the lamp body 10 and the outer lens 14, the vertical shade 1
A lamp room space B for a turn signal lamp and a lamp room space C for a backup lamp are defined by 1 and 11.
The light emitting diodes 22 are arranged at equal intervals along the upper and lower side walls 12a and 12b of the lamp body 10.
Light emitted from the light emitting diode 22 obliquely enters the inner lens 16 on which the prism step 17 is formed from above and below, is transmitted through the inner lens 16 and is guided to the outer lens 14 as parallel light, and by the fisheye step 15. The diffused light is distributed vertically and horizontally, and the entire outer lens 14 functions as a tail and stop lamp.

In the lamp chamber space C, a cylindrical light guide member 40 is horizontally arranged on the back side of the light emitting diode mounting position. On the rear surface of the light guide member 40, a light emitting step 42 in which V-shaped vertical slits are continuous in the axial direction of the light guide member is formed, and is guided from a light source unit 44 provided on the right side of the lamp body 10. White light is incident on the end surface of the light member 40. Then, the light reflected by the light emitting step 42 of the light guide member 40 is emitted as substantially parallel light from the step 42 formation surface of the light guide member 40 to the front side, and is incident on the inner lens 16 from an obliquely vertical direction.
Further, a light guide member 46 having the same structure as the light guide member 40 is provided in the lamp chamber space B on the back side of the light emitting diode installation position, and amber light from the light source unit 45 is guided by the light guide member 4.
6 is made incident. And the light guide member 46
The parallel light of amber color emitted from is incident on the inner lens 16 from an obliquely vertical direction.

At any time, the red light emitted from the light emitting diode 22 causes the entire outer lens 14 to emit red light to function as a tail lamp. When the brake pedal is depressed, the current supplied to the light emitting diode 22 increases and the light emitting diode The amount of light emission increases, and the amount of light emission of the outer lens 14 also increases in proportion to this, and functions as a stop lamp. When the light source unit 45 is activated and amber light is intermittently incident on the light guide member 46, the outer lens 14 intermittently emits amber light and the turn signal lamp blinks. When the light source unit 44 is activated and white light is incident on the light guide member 40, the outer lens 14
Lights up in white and the backup lamp lights up.

FIG. 10 is a vertical sectional view of a rear combination lamp which is a sixth embodiment of the present invention. In this embodiment, the light emitting diode 22 is provided only on the upper side, and the depth is further thinned as compared with the lamps shown in the various embodiments described above. Inside the rear wall of the lamp body, a transparent reflection film 50 named “SOLF”, in which vertically extending rectangular grooves are continuously formed at a constant pitch in the left-right direction, is attached, and the light of the light emitting diode 22 is reflected by the reflection film 50. And is guided to the outer lens 14 via the inner lens 16 arranged on the back side of the outer lens 14.

[0022]

As is apparent from the above description, in the vehicular lamp according to the present invention, the light emitting diodes are arranged obliquely with respect to the inner lens and along the side wall of the lamp body. The number of light emitting diodes for the light emitting surface can be reduced, that is, a large number of light emitting diodes can be used to illuminate a large light emitting surface, resulting in cost reduction. Further, since the depth of the lamp can be reduced, the lamp arrangement space may be small, and the degree of freedom of the lamp arrangement position is significantly widened.

Further, since the prism step formed on the back surface of the inner lens makes the light transmitted through the inner lens parallel and smooth and guides a uniform amount of light to the entire light emitting surface of the outer lens, the lamp with good visibility is provided. Is obtained. Since the light emitting diodes are arranged in series along the side wall of the lamp body so that the optical axis is oblique to the inner lens, the side edge of the printed circuit board supporting the light emitting diode is shaped to follow the side wall of the lamp body. It can be easily applied to a lamp having a shape in which the lateral region extends around the back side.

In the second aspect, since the light emission amount of the outer lens is increased by the reflected light on the light reflection surface formed inside the lamp body, a lamp having a larger light emission amount and excellent visibility can be obtained. According to the third aspect, there is obtained a combination lamp integrally having a plurality of functions in which a lamp using a light emitting diode as a light source and a lamp using another light source means as a light source are integrated.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a rear combination lamp that is a first embodiment of the present invention.

FIG. 2 is a vertical sectional view of the lamp.

FIG. 3 is a vertical sectional view of a rear combination lamp according to a second embodiment of the present invention.

FIG. 4 is an exploded perspective view of a rear combination lamp that is a third embodiment of the present invention.

FIG. 5 is a vertical sectional view of the lamp at a position of a turn signal lamp.

FIG. 6 is a vertical sectional view of a rear combination lamp according to a fourth embodiment of the present invention.

FIG. 7 is an enlarged sectional view of a thinning step.

FIG. 8 is an exploded perspective view of a rear combination lamp according to a fifth embodiment of the present invention.

FIG. 9 is a vertical sectional view of the lamp.

FIG. 10 is a vertical sectional view of a rear combination lamp according to a sixth embodiment of the present invention.

FIG. 11 is a vertical sectional view of a conventional lamp.

[Explanation of symbols]

10 Lamp Body 12a, 12b Side Wall of Lamp Body 14 Outer Lens 16 (16A, 16B), 16C Inner Lens 17 Prism Step 19 Light Reflecting Surface 20 Printed Circuit Board Supporting Light Emitting Diode 22 Light Emitting Diode 30a Different Light Source Means from Light Emitting Diode Bulb for backup lamp 30b Bulb for turn signal lamp which is a light source means different from light emitting diode 32 Filter lens for converting white light to other functional color light θ Angle of inclination of light emitting diode with respect to inner lens

Claims (3)

[Claims] 1. A lamp chamber space is formed by a rectangular container-shaped lamp body and a rectangular outer lens attached to a front opening of the lamp body, and a large number of light emitting diodes which are light sources are formed in the lamp chamber space. In a vehicle lamp provided with an inner lens between the light emitting diode and the outer lens, the light emitting diode is inclined with respect to the inner lens so that light is guided to the entire width of the inner lens corresponding to the light emitting direction. And a prism step that is arranged in series along the side wall of the lamp body and that guides the light guided from the light emitting diode to the front side into substantially parallel light on the back side of the inner lens. Lighting equipment. 2. The vehicular lamp according to claim 1, wherein a light reflecting surface is formed on the back side of the light emitting diode in the lamp chamber space. 3. The outer lens and the inner lens are transparent, and are configured such that the light emitting diode itself emits a functional color, and is different from the functional color emitted by the light emitting diode at a predetermined position on the back side of the inner lens. 2. The vehicular lamp according to claim 1, further comprising light source means for forming light of a functional color.