JP2824865B2 - Reflex reflector combination lamp - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial applications]

The present invention relates to a vehicular lamp, and more particularly, to a vehicular lamp in which a reflection light emitting unit such as a tail / stop lamp by a reflex reflector and a self light emitting unit using an LED light emitting element as a light source are combined.

[Prior art]

FIG. 3 shows an example of a conventional vehicle lamp 91 of this type. A reflex reflector 94 is provided on a part of an outer lens 93 formed substantially in a box shape with a housing 92.
Are provided, and a plurality of LED light emitting elements 95 whose optical axes are directed in the same direction as the irradiation direction of the vehicular lamp 91 inside a box formed by the housing 92 and the outer lens 93.
Are arranged in a matrix or the like by using a printed circuit board 96, for example.

[Problems to be solved by the invention]

However, in the above-described conventional vehicle lamp 91, firstly, when the LED light emitting element 95 used as the light source has a characteristic that the luminance decreases as the temperature increases, the luminance gradually increases due to the heat generation when performing continuous lighting. In particular, when arranged in a plane such as a matrix, the central portion becomes significantly darker, causing a problem of giving an uncomfortable feeling to the viewer.Secondly, a plurality of light sources are employed. As a result, the direct light from the individual LED light emitting elements 95 is viewed through the outer lens 93, and the vehicular lamp is
The 91 light-emitting surfaces were observed in a spot-like manner, causing a problem of impairing the sense of quality, and solving these points was an issue.

[Means for Solving the Problems]

As a specific means for solving the above-mentioned conventional problems, the present invention relates to a reflex reflector combination lamp in which a reflection light-emitting part by a reflex reflector and a light-emitting part by an LED light source are combined. A LED light source disposed on the rear surface of the reflex reflector distributed on the outer lens surface, with the optical axis directed in a direction substantially opposite to the irradiation direction of the lamp; and a housing surface and the LED light source. The above-mentioned conventional problem is solved by providing a reflex reflector combination lamp characterized by comprising the above-mentioned reflecting surface arranged in the optical axis direction.

【Example】

Next, the present invention will be described in detail based on an embodiment shown in the drawings. 1 is a lamp according to the present invention. The lamp 1 is formed in a substantially box shape by an outer lens 2 and a housing 3.
Is similar to the conventional example in that a reflex reflector 4 (hereinafter, simply referred to as a reflector 4) is provided on a part of the surface and a reflection light emitting portion is combined. The reflector 4 is an outer lens 2
In addition, the LED light emitting elements 5 are disposed on the printed circuit board 6 so that the printed circuit board 6 is close to the back surface of the reflector 4, The optical axis X is arranged to be opposite to the irradiation direction Y of the lamp 1. Here, a supplementary description of the reflector 4 will be given. Since the reflector 4 is configured to reflect almost all of the incident light, the reflector 4 becomes opaque from the viewing direction side of the lamp 1, and Even when 6 is arranged close to the back, it is not seen through. With the above configuration, the optical axis X of the LED light emitting element 5
Is directed to the housing 3. According to the present invention, a reflecting surface 7 is formed on the inner surface of the housing 3 by, for example, vapor deposition of metal, and the reflecting surface 7 is enlarged, for example, in FIG. The light from the LED light emitting element 5 is reflected toward a portion other than the reflector 4, that is, a portion of the outer lens 2, and is transmitted through the outer lens 2 to form a lamp. Light is emitted to the outside of the light emitting device 1 to form a self-light emitting portion. The outer lens 2 is provided with an appropriate lens cut 2a to obtain a light distribution characteristic suitable for a tail / stop lamp or the like for which the lamp 1 is intended. Next, the operation and effect of the present invention having the above-described configuration will be described. According to the present invention, the LED light emitting element 5 is disposed so as to be close to the back surface of the reflector 4 so that the optical axis X is in the opposite direction. The substrate 6 and the LED light-emitting element 5 are closer to the outside air than the one disposed on the housing 3 side of the conventional example, and the outside air is easy to recirculate with fresh air due to the running of a car or the like. Therefore, the cooling of the printed circuit board 6 and the LED light emitting element 5 is performed more effectively. Since the reflectors 4 are dispersed, the printed circuit boards 6 disposed on the back surface are naturally dispersed, so that partial concentration of heat does not occur.
This also reduces the occurrence of a partial decrease in luminance. Also, with the above configuration, the light from the LED light emitting element 5 is emitted to the outside of the lamp 1 via the outer lens 2 after being reflected on the reflection surface 7,
The LED light emitting element 5 is not directly viewed through the outer lens 2, thereby preventing spots of light spots on the light emitting surface of the lamp 1. The speckles can be further reduced by appropriately setting the shape of the reflection surface 7 and appropriately setting the lens cut 2a formed on the outer lens 2.

【The invention's effect】

As described above, according to the present invention, an LED light source disposed with the optical axis directed substantially in the opposite direction to the irradiation direction of the lamp on the back surface of the reflex reflector disposed dispersedly on the outer lens surface, By providing a reflex reflector combination lamp comprising the LED light source and a reflection surface arranged in the optical axis direction, firstly, the LED light source is located outside the vehicle body and is in contact with the outside air. It is possible to dispose it on the outer lens side with high cooling efficiency, reduce the temperature rise, and thereby achieve an extremely excellent effect of preventing the overall decrease in luminance and the occurrence of partial luminance unevenness, Secondly, the light from the LED light source is made to reach the outer lens via the reflection surface, so that the light source is not directly viewed from the viewing direction, and the light emitting surface of the lamp has uniform brightness. Also emits surface light Becomes that excellent effects in improving the quality as.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of a reflex reflector combination lamp according to the present invention, FIG. 2 is an enlarged sectional view showing a main part of the same embodiment, and FIG. 3 is a sectional view showing a conventional example. It is. DESCRIPTION OF SYMBOLS 1 ... Lamp 2 ... Outer lens 3 ... Housing 4 ... Reflex reflector 5 ... LED light emitting element 6 ... Printed circuit board 7 ... Reflective surface

Claims (1)

(57) [Claims] 1. A reflex reflector combination lamp comprising a combination of a reflection light-emitting part by a reflex reflector and a self-light-emitting part by an LED light source, wherein the self-light-emitting part is dispersedly disposed on an outer lens surface. An LED light source disposed on the back of the reflex reflector with the optical axis directed substantially in the direction opposite to the irradiation direction of the lamp, and a reflecting surface disposed on the housing surface and in the optical axis direction of the LED light source. A reflex reflector combination lamp characterized by being formed.