JP2001118412A - Lamp for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lamp for vehicles, whose lens adjusts and orients light emitted from a light source consisting of a plurality of light emitting diodes, and which allows a wider light orientation distribution as compared to the prior art. SOLUTION: The lamp for vehicles includes a light source 10 having a plurality of light emitting diodes disposed in parallel on a substrate 11; and an inner lenses 20 disposed in front of the light source and having Fresnel lenses 22 formed opposite to the respective light emitting diodes 10. The Fresnel lenses 22 and the light emitting diodes are disposed in such a manner that their optic axes are not overlapped with each other. Where the Fresnel lenses 22 are disposed on the inner lens 20 at desired intervals, the light-emitting diodes 12 are disposed on the substrate 11 in such a manner that their optic axes are regularly spaced apart from the optic axes of the respective Fresnel lens 22. One the other hand, where the respective light emitting diodes 12 are disposed on the substrate 11 at desired intervals, the Fresnel lenses 22 are disposed on the inner lens 11 in such a manner that their optic axes are regularly spaced apart from those of the respective light emitting diodes.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a vehicular lamp.
In particular, the present invention relates to a vehicular lamp used as an auxiliary lamp of a vehicle such as an automobile.

[0002]

2. Description of the Related Art Conventionally, a vehicle lamp 90 as shown in FIG. 10 has been used as an auxiliary lamp of a vehicle. The conventional vehicular lamp 90 is formed, for example, by arranging light-emitting diode (LED) elements 91b in a row on a rectangular planar substrate 91a to form an LED light source 91, and illuminating the LED light source 91 in the irradiation direction. Is covered with a lens 92 provided with a lens cut 92a corresponding to each of the LED elements 91b.

In the vehicle lamp 90 thus configured, when the LED light source 91, that is, each LED element 91b is turned on, the entire surface of the lens 92 shines with uniform brightness by the lens cut 92a. Therefore, this lens 9
If 2 is colored with red or the like, the vehicle lamp 90 shines red, so that the vehicle lamp 90 can be used as a stop lamp or the like of the vehicle.

[0004]

SUMMARY OF THE INVENTION However, LEDs
As a light source, and each L
When used in combination with an inner lens with a Fresnel lens corresponding to ED, if the mounting position of the inner lens is shifted with respect to the light source, the position of the optical axis of the LED is shifted from the optical axis of the inner lens, and the vehicle There has been a problem that the main optical axis as the lighting fixture is largely shifted, and the overall orientation characteristics of the vehicle lighting fixture are shifted.

[0005] This is because a plurality of LEDs in the light source are arranged at fixed positions, and the position of the Fresnel lens in the inner lens mounted in front of the light source is also fixed. This is because if the LED is shifted, a similar optical axis position shift occurs between each LED and each Fresnel lens, and the entire light emitted from the inner lens is shifted in the same direction.

SUMMARY OF THE INVENTION It is a first object of the present invention to provide a vehicular lamp having a light source and an inner lens so that a wider orientation pattern can be obtained than before.

In addition, light from a light source constituted by arranging a plurality of luminous bodies such as LEDs on a substrate is adjusted by using a short focus lens such as a Fresnel lens to the optical axis of the LED corresponding to the optical axis. In a vehicular lamp configured to be oriented in a predetermined direction by the disposed inner lens, even if a positional shift occurs between the light source and the lens plate during assembly, the orientation distribution as the lamp does not significantly change, A second object of the present invention is to provide a vehicular lamp capable of reducing performance deterioration.

[0008]

The present invention that achieves the above object is described below as the first to fourth aspects of the present invention.

According to a first aspect of the present invention, there is provided a light source having a plurality of light emitters arranged side by side on a substrate, and a lens plate disposed in front of the light source and having a lens formed at a position facing each light emitter. In the vehicular lamp provided with the above, the positions of the optical axis of each lens and the optical axis of the light emitting body are relatively shifted from each other.

According to a second aspect of the present invention, the lenses are arranged on the lens plate of the first aspect at predetermined intervals, and the optical axis of the luminous body is aligned with respect to the optical axis of each lens. It is characterized in that the light source is formed by disposing the light source on the substrate at regularly shifted positions.

According to a third aspect of the present invention, a light source is formed by arranging the respective luminous bodies on the substrate of the first aspect at predetermined intervals, and a light source is formed. It is characterized in that the position of the optical axis of the lens is regularly shifted and arranged on the lens plate.

A fourth aspect of the present invention is characterized in that the luminous body according to any one of the first to third aspects is a light emitting diode, and the lens is a Fresnel lens.

According to the vehicular lamp of the present invention, the position of the optical axis of the light emitter disposed on the substrate of the light source and the position of the optical axis of each lens disposed on the lens plate disposed in front of the light source are relatively determined. And the regular shift, the orientation distribution of the lamp becomes wider as compared with the case where the optical axis of the light emitter and the optical axis of each lens coincide.

Further, the position of the optical axis of the luminous body is regularly shifted with respect to the optical axis of each lens with respect to the lens plate in which each lens is arranged at a predetermined interval. A light source is formed by arranging the light sources, or a light source is formed by arranging the light emitters on a substrate at predetermined intervals. By arranging the axes on the lens plate with a regular shift, even if the mounting position of the lens plate is slightly shifted with respect to the light source, the orientation distribution of the vehicle lamp does not change significantly.

[0015]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings.

FIG. 1 shows the overall structure of a vehicular lamp E to which the present invention is applied. The vehicle lamp E is, for example, formed by arranging the LED elements 12 in rows and columns on a rectangular planar substrate 11 in the same manner as the conventional vehicle lamp 90 described with reference to FIG. , This LED light source 1
The irradiation direction 0 is covered with a short focal length lens corresponding to each of the LED elements 12, for example, an inner lens 20 on which a Fresnel lens 22 is formed.

In the vehicle lamp E thus configured, when the LED light source 10, that is, each LED element 12 is turned on, the inner lens 20 is driven by the Fresnel lens 22.
The entire surface shines with uniform brightness. Therefore, if the inner lens 20 is colored red or the like, the vehicular lamp E shines red, and the vehicular lamp E can be used as a stop lamp or the like of the vehicle.

FIG. 2A shows a light source 1 in the lamp E of FIG.
This shows a state where the optical axis AD of the LED 12 and the optical axis AF of the Fresnel lens 22 of the inner lens 20 match. FIG. 2B shows the orientation characteristics of the radiated light of one LED 12 when the optical axis AD of the LED 12 and the optical axis AF of the Fresnel lens 22 match as shown in FIG. 2A. I have. In a state where the optical axes AD and AF of the LED 12 and the Fresnel lens 22 match, the light emitted from the LED 12 is modulated by the Fresnel lens 22,
The light is emitted from an outer lens (not shown) and has a substantially elliptical shape in a horizontal direction at a position separated by a predetermined distance.

FIG. 3A shows a light source 1 in the lamp E of FIG.
This shows a state in which the optical axis AD of the LED 12 and the optical axis AF of the Fresnel lens 22 of the inner lens 20 are shifted. FIG. 3B shows the orientation characteristics due to the light emitted from one LED 12 when the optical axis AD of the LED 12 and the optical axis AF of the Fresnel lens 22 are shifted as shown in FIG. I have. When the optical axis AD of the LED 12 and the optical axis AF of the Fresnel lens 22 are displaced, the LED 12
Is shifted due to the shift of the optical axis AF of the Fresnel lens 22, and the alignment characteristic at a position away from the Fresnel lens 22 by a predetermined distance is a substantially elliptical light distribution characteristic that is long in the horizontal direction.

FIG. 4A shows a case where a plurality of LEDs 12 having a predetermined installation interval D and a corresponding installation interval L of the Fresnel lens 22 are the same as the installation interval D of the LEDs 12 in the lamp E of FIG. 2 shows a state in which the mounting position of the inner lens 20 is shifted with respect to the light source 10 and the optical axis AF of the Fresnel lens 12 is all shifted in the horizontal direction with respect to the optical axis AD of the LED 12. In this case, as shown in FIG. 3B, the orientation characteristic of the LED 12 becomes a substantially elliptical shape that is long in the horizontal direction similarly to FIG. 3B, but the center thereof is the optical axis AF of the Fresnel lens 22. Is shifted from the optical axis AD of the LED 12 in the direction.

FIGS. 5A to 5C are diagrams for explaining the principle of the present invention. In the present invention, the optical axis AL of the LED 12 and the optical axis A of the Fresnel lens 22 in the lamp E of FIG.
L is shifted. For example, in the example shown in FIGS. 5A and 5B, the installation interval of two corresponding Fresnel lenses 22 is shorter than the installation interval D of two specific LEDs 12. That is, in the example shown in FIGS.
Optical axis A of one Fresnel lens 22 with respect to optical axis AL of
Although L is shifted to the right in the horizontal direction, the optical axis AL of the Fresnel lens 22 is shifted to the left in the horizontal direction with respect to the optical axis AL of the adjacent LED 12. As a result, FIG.
As shown in (c), the alignment characteristics due to the light that has passed through the Fresnel lens 22 corresponding to the two LEDs 12 are a combination of the left-aligned alignment characteristics and the right-aligned alignment characteristics.
In comparison with the case where the optical axis AD of the two LEDs 12 and the optical axis AF of the corresponding Fresnel lens 22 coincide with each other,
The spread to the left and right increases. In addition, if the optical axis AL of the LED 12 and the optical axis AL of the Fresnel lens 22 are relatively shifted according to a certain rule, the light source 10 on which the LED 12 is installed can be used.
Even if a shift occurs due to a mounting error between the inner lens 20 and the inner lens 20 on which the Fresnel lens 22 is installed, the influence on the alignment characteristics is reduced.

FIG. 6 shows the configuration of a first embodiment of a vehicular lamp E of the present invention. In this embodiment, the installation interval L of the Fresnel lens 22 in the inner lens 20 is constant, and the installation position of the LED 12 on the substrate 11 with respect to the optical axis (center of the lens) of the fixed Fresnel lens 22. (Optical axis) is changed regularly.
That is, in the first embodiment, the optical axes of the LEDs 12 arranged in the horizontal direction are alternately shifted left and right by the same distance with respect to the optical axis of the Fresnel lens 22, and the LEDs 1 arranged in the vertical direction are arranged.
The two optical axes are alternately shifted vertically by the same distance from the optical axis of the Fresnel lens 22.

The Fresnel lens 22 fixed as described above
By regularly shifting the optical axis of the LED 12 up, down, left, and right with respect to the optical axis of, the alignment characteristics are spread up, down, left, and right, and between the light source 10 in which the LED 12 is installed and the inner lens 20 in which the Fresnel lens 22 is installed. However, even if a vertical and horizontal displacement occurs due to a mounting error, the influence on the alignment characteristics is reduced.

FIG. 7 shows the configuration of a second embodiment of the vehicular lamp E of the present invention. This embodiment is also a case where the installation interval L of the Fresnel lens 22 in the inner lens 20 is constant, and the installation position (optical axis) of the LED 12 on the substrate 11 with respect to the optical axis of the fixed Fresnel lens 22. Is changed regularly. In the second embodiment, the optical axes of the LEDs 12 arranged in the horizontal direction are shifted from the optical axis of the Fresnel lens 22 so that the deviation gradually increases. Although not shown in the second embodiment with respect to the deviation in the vertical direction, the optical axis of the LEDs 12 aligned in the vertical direction also deviates from the optical axis of the Fresnel lens 22 in the vertical direction. It is shifted so that it becomes larger gradually.

Also in the second embodiment, by regularly shifting the optical axis of the LED 12 up, down, left and right with respect to the optical axis of the fixed Fresnel lens 22, the orientation characteristics are spread up, down, left and right, and the LED 12 is installed. Light source 10
Even if a vertical and horizontal displacement occurs due to an attachment error between the inner lens 20 and the inner lens 20 on which the Fresnel lens 22 is installed, the influence on the alignment characteristics is reduced.

FIG. 8 shows the configuration of a third embodiment of the vehicular lamp E of the present invention. This embodiment is different from the first embodiment in that the installation intervals P of the LEDs 12 in the light source 10 are different.
Is constant, and the optical axis of the Fresnel lens 22 (lens center) with respect to the optical axis of the fixed LED 12
Are changed regularly. That is, in the third embodiment, the arrangement of the optical axes of the Fresnel lenses 22 arranged in the horizontal direction is alternately shifted to the left and right with respect to the optical axis of the LED 12 by the same distance ΔL, and the light of the Fresnel lenses 22 arranged in the vertical direction is arranged. The axis is alternately shifted vertically by the same distance ΔL with respect to the optical axis of the LED 12.

As in the third embodiment, a fixed LED
The optical characteristics of the Fresnel lens 22 are regularly shifted up, down, left, and right with respect to the 12 optical axes, so that the orientation characteristics are spread up, down, left, and right, and the light source 10 having the LED 12 and the inner lens 20 having the Fresnel lens 22 are provided. Even if there is a shift up and down and left and right due to mounting errors between
The influence on the alignment characteristics is reduced.

FIG. 9 shows the configuration of a fourth embodiment of a vehicle lamp E according to the present invention. This embodiment is different from the second embodiment in that the installation interval P of the LEDs 12 in the light source 10 is different.
Is constant, and the optical axis of the Fresnel lens 22 is regularly changed with respect to the optical axis of the fixed LED 12. In the fourth embodiment, the optical axes of the Fresnel lenses 22 arranged in the horizontal direction are shifted from the optical axes of the LEDs 12 so that the deviation gradually increases. Although the fourth embodiment does not show a shift in the vertical direction, the Fresnel lenses 22 arranged in the vertical direction are also arranged in the vertical direction.
Are shifted from the optical axis of the LED 12 so that the deviation gradually increases.

Also in the fourth embodiment, the fixed LE
By regularly shifting the optical axis of the Fresnel lens 22 up, down, left, and right with respect to the optical axis of D12, the orientation characteristics spread up, down, left, and right, and the light source 10 in which the LED 12 is installed is provided.
Even if a vertical and horizontal displacement occurs due to an attachment error between the inner lens 20 and the inner lens 20 on which the Fresnel lens 22 is installed, the influence on the alignment characteristics is reduced.

The relative displacement between the optical axis of the LED 12 and the optical axis of the Fresnel lens 22 is not limited to the above embodiment. Further, the lens is not limited to the Fresnel lens 22.

[0031]

As described above, according to the vehicular lamp of the present invention, the vehicular lamp is disposed on the optical axis of the luminous body such as an LED disposed on the substrate of the light source and on the inner lens disposed on the front surface of the light source. By relatively and regularly shifting the position of the optical axis of a short focus lens such as a Fresnel lens, the orientation of the lamp is compared to the case where the optical axis of the illuminant and the optical axis of each lens coincide. This has the effect of widening the distribution.

Further, the position of the optical axis of the luminous body is regularly shifted with respect to the optical axis of each lens with respect to the inner lens in which each lens is arranged at a predetermined interval. A light source is formed by arranging the light sources, or a light source is formed by arranging the light emitters on a substrate at predetermined intervals. By arranging the shaft on the inner lens with a regular shift, there is an effect that even if the mounting position of the inner lens is slightly shifted with respect to the light source, the orientation distribution of the vehicle lamp does not change significantly.

[Brief description of the drawings]

FIG. 1 is a sectional view of a vehicular lamp using an LED and a Fresnel lens to which the present invention is applied.

2A is a diagram showing a state in which the optical axes of the LED and the Fresnel lens coincide with each other in the lamp of FIG. 1, and FIG. 2B is an explanatory diagram showing the orientation characteristics of the LED in the state of FIG. .

3A is a view showing a state in which the optical axes of the LED and the Fresnel lens are similarly shifted in the horizontal direction in the lamp of FIG. 1, and FIG. 3B is a view showing an orientation characteristic of the LED in the state of FIG. FIG.

4A is a diagram showing a state in which the plurality of LEDs and the corresponding optical axes of the Fresnel lenses in the lamp of FIG. 1 are horizontally offset, and FIG. 4B is a diagram showing the LEDs in the state of FIG. FIG. 4 is an explanatory diagram showing an orientation characteristic.

FIG. 5A is a diagram for explaining the principle of the present invention, and FIG.
FIG. 2B shows a state in which the optical axes of two LEDs and the corresponding Fresnel lens in the lamp of FIG. 1 are horizontally displaced in opposite directions, and FIG. 2B shows the light emitted from the LED in the state of FIG. Figure showing the effect of the Fresnel lens, (c) is (a)
It is explanatory drawing which shows the orientation characteristic of the light radiated | emitted from LED of the state of FIG.

FIG. 6 is an explanatory view showing the configuration of a first embodiment of the vehicular lamp of the present invention.

FIG. 7 is an explanatory view showing a configuration of a second embodiment of the vehicular lamp of the present invention.

FIG. 8 is an explanatory diagram showing a configuration of a third embodiment of the vehicular lamp of the present invention.

FIG. 9 is an explanatory diagram showing a configuration of a fourth embodiment of the vehicular lamp of the present invention.

FIG. 10 is a cross-sectional view showing a configuration of a conventional vehicular lamp.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Light source 11 Substrate 12 Light emitting diode (light emitting body) 20 Inner lens 21 Base plate 22 Fresnel lens (lens) 30 Cylindrical case 40 Harness

Claims (4)

[Claims] 1. A light source (10) having a plurality of luminous bodies (12) arranged side by side on a substrate (11), and the light source (10)
And a lens plate (2) having a lens (22) formed at a position facing each of the light emitters (12).
0), wherein the position of the optical axis of each lens (22) and the position of the optical axis of the light-emitting body (12) are relatively displaced from each other. 2. Each of the lenses (22) is arranged on the lens plate (20) at predetermined intervals, and the luminous body is arranged with respect to the optical axis of each of the lenses (22). The vehicular lamp according to claim 1, wherein the position of the optical axis of (12) is regularly shifted and disposed on the substrate (11). 3. The light-emitting body (1) on the substrate (11).
2) are arranged at predetermined intervals, and the position of the optical axis of the lens (22) is regularly shifted with respect to the optical axis of each of the luminous bodies (12).
0) The vehicular lamp according to claim 1, wherein the vehicular lamp is arranged on a plate. 4. The vehicular lamp according to claim 1, wherein the light emitter is a light emitting diode, and the lens is a Fresnel lens.