JPH0447842Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to a lamp device that prevents false lighting when not lit and has a large brightness ratio between when lit and when not lit, and is particularly applicable to automobile marker lights. The present invention relates to a lamp device useful as a lamp device.

[Conventional technology]

Signal lights such as brake lights, turn signal lights, and reversing lights installed at the rear of a car each have different lighting colors. A colored translucent outer lens having a filter function is provided to produce a predetermined marker color.

[The problem that the idea attempts to solve]

However, in this type of lamp device, when outside light enters even when the lamp is not lit, the outer lens develops color due to the reflected light from a parabolic mirror located behind the light source, making it difficult to see if the lamp is actually lit. There were problems such as misidentification, and a low brightness ratio between when the light was on and when the light was not on.

The present invention was devised in view of the above problem, and even if external light is incident when the lamp is not lit, it is absorbed inside the lamp device to prevent coloring of the outer lens.
The object of the present invention is to provide a lamp device that has a large brightness ratio when lit and when not lit.

[Means to solve the problem]

In order to achieve the above object, the lamp device according to the present invention includes an outer lens made of a translucent material and emitting a predetermined color, and an outer lens made of a translucent material arranged in parallel behind the outer lens. It is equipped with an uncolored inner lens, and condensing lens steps are formed at predetermined intervals on the back side of the inner lens, and a light-transmitting window is formed on the front side to form the optical axis of each of the condensing lens steps. A reflective film with a predetermined width is formed, and a complementary color film is formed on the film surface of the reflective film to have a complementary color relationship with the coloring of the outer lens, and a complementary color film is located behind the inner lens to reflect the light flux from the light source. The object of the present invention is to constitute a beam collimating means for irradiating the condensing lens step onto the surface on which the condensing lens step is formed as a parallel beam, and the reflective coating may be constituted by an opaque film or a semi-transparent film. can.

Further, the focal point of each condensing lens step is located near the surface on which the complementary color film is formed, and the coloring of the outer lens is visually recognized as a dark color due to the complementary color effect of the coloring of the complementary color film.

[Effect]

According to the lamp device according to the present invention, when the lamp device is lit, the outer lens is illuminated with the light emitted from the light source through the transparent window of the inner lens to develop a predetermined marker color, and when the lamp is not lit, the outer lens The external light incident through the lens is reflected by the reflective film to the outside of the outer lens, and additive color mixing occurs due to the color development by the reflective film and the color development by the outer lens, and is visually recognized as a predetermined color, for example, a dark color. Then,
It is possible to prevent false lighting when the lamp is not lit, and to increase the brightness ratio when the lamp is lit.

〔Example〕

Embodiments of the lamp device according to the present invention will be described below with reference to the drawings.

In FIGS. 1 to 4, 1 is a colored outer lens made of a translucent material having a filter function of a predetermined indicator color such as red or yellow, and 2 is a colored outer lens made of a translucent material, which is concentrated on the back side. This is an uncolored inner lens in which optical lens steps 3 are formed at a predetermined period. This inner lens 2 has a reflective film 5 of a predetermined width formed on its front surface side, with the optical axis forming part of the condensing lens step 3 formed on the back surface serving as a light-transmitting window 4. A complementary color film 6 is formed on top of the outer lens 1 to form a predetermined color by additive color mixing (referred to as "complementary color relationship" in the present invention). In the lens device according to the present invention, the reflective film 5 formed on the surface side of the inner lens 2 is a completely light-shielding film or a semi-transparent film such as a half mirror, as shown in FIG. It may be a light film, or, as shown in FIG. 3, in some cases it may utilize the reflective properties of the material of the surface of the inner lens 2 itself.

In the lens device according to the present invention, the outer lens 1 may be colored by being made of a colored transparent material, or by coating the lens surface with a colored transparent film. Further, the reflective film 5 is made of a colorless paint containing a metal material, and the complementary color film 6 is made of a colorless paint containing a metal material.
can be formed using a transparent paint, a transparent plate, or the like in a color complementary to the coloring of the outer lens 1.

Furthermore, as an internal illumination means, an inner lens 2
The synchrotron radiation emitted from the light source 7 arranged at the rear of the inner lens 2 is transmitted through the luminous flux parallelizing means 8.
The structure is such that a parallel beam of light is irradiated onto three surfaces of the condensing lens step.

When the light source 7 is a point light source such as a light bulb, the light beam parallelizing means 8 is realized by a parabolic mirror whose focal point is the light source installation position, a Fresnel lens, or a combination of both. be able to. Further, the formation period and formation position of the complementary color film 6 correspond to the period of the condensing lens step 3 formed on the rear surface of the inner lens 1, as shown in FIG. 1, for reasons described later, and It is desirable to avoid the light-transmitting window 4 of the condensing lens step 3 and align it approximately at the center between the optical axes.

Note that it is effective to position each focal point F1 of the condensing lens step 3 near the surface on which the complementary color film 6 is formed.

In the lamp device according to the present invention, for example, if the filter function of the outer lens 1 is red, and the complementary color film 6 is blue, which absorbs red and becomes a dark color, when the light is not lit, the outer lens 1
Of the external light that enters through the external light, for example, the light beam L1 that does not enter the complementary color film 6 is reflected by the light beam collimating means 8 and causes the outer lens 1 to develop a red color, but does not enter the complementary color film 6. The light beam L2 is absorbed by the complementary color film 6, and the reflected light beam becomes weak. Therefore, the larger the area of the complementary color film 6 that occupies on the front surface of the inner lens 2, the lower the degree to which the outer lens 1 turns red due to external light, causing the lens to be mistakenly perceived as if it were lit. The problem will be resolved. Furthermore, since the luminous flux L2 incident on the complementary color film 6 is absorbed by the complementary color film 6, as shown in FIG. It goes without saying that the same effect as described above can be achieved in the case of the lens 2, or even in the case of the inner lens 2 in which only the complementary color film 6 is formed as shown in FIG.

Furthermore, the formation period and position of the complementary color film 6 are made to match the formation period of the condensing lens step 3 formed on the rear surface of the inner lens 2, and
When the optical axes of the condensing lens step 3 are aligned approximately at the center, the light beam emitted from the light source 7 becomes a parallel beam by the beam collimating means 8 during lighting, and the condensing lens step 3 converts the light beam into a parallel beam. Since the light is condensed at the focal point F1 on the optical axis of each condenser lens, the outer lens 1 can be colored red without being hindered by the complementary color film 6, that is, without reducing the output efficiency of the luminous flux. Therefore, it is possible to increase the brightness ratio between when the lamp is lit and when it is not lit. Furthermore, as is clear from FIG. 1, if each focal point F1 of the condensing lens step 3 is located near the surface on which the complementary color film 6 is formed, even if the width of the complementary color film 6 is made wide, the light cannot be turned on. The luminous flux at the time is not obstructed by the complementary color film 6 and can cause the outer lens 1 to develop a color. On the other hand, as described above, when the light is not lit, the outer lens 1 develops a red color due to the incidence of external light. Since the intensity becomes lower, the ratio of brightness when lit and when not lit becomes even larger.

FIG. 4 shows an embodiment in which a parabolic mirror is used as the luminous flux collimating means 8, and the inner surface of the bottom part of the lamp body 9 forms a parabolic curved surface with a focal point F2, and the inner surface is used to direct light. It is processed into a reflective mirror surface 10. The lighting light source 7, such as a light bulb, is attached to the lamp body 9 so as to be located at the focal point F2, and has a filter function of a predetermined indicator color provided on the opening surface of the lamp body 9, for example, red in the case of a brake light. An uncolored inner lens 2 is arranged in parallel inside a colored outer lens 1. As explained in the above embodiment, the inner lens 2 is made of a light-transmitting material and has a condensing lens step 3, and has a front surface that substantially coincides with each focal point position of the condensing step lens 3. A reflective light-shielding paint film of a predetermined width is formed as a transmission window 4 and coincides with the formation period of the condensing lens step 3 and approximately coincides with the center between the respective optical axes of the condensing lens step 3. A coating 5 such as the above is coated and formed, and a complementary color paint film 6 such as blue, which has a complementary color relationship with the coloring of the outer lens 1 which is colored red light, is further coated and formed on the surface of the reflective coating 2. be.

Further, FIG. 5 shows an embodiment in which a Fresnel lens 11 is used as the luminous flux parallelizing means 8, in which a lighting light source 7 is fixedly installed on the bottom inner surface of the lamp body 9, and an opening of the lamp body 9 is installed. An outer lens 1 having a filter function of a predetermined sign color, such as yellow in the case of a direction indicator light, is provided on the surface. The inner lens 2 is arranged in parallel with the outer lens 1, and includes a Fresnel lens 11 located behind the inner lens 2 and having the light source position as a focal point F2. The inner lens 2 is made of a translucent material, has a condensing lens step 3 formed on the back side, and matches the formation period of the condensing lens step 3, and
A predetermined width of a blue resin, which has a complementary color to the color of the outer lens 1 such as yellow, and is made of a blue resin that absorbs light such as yellow, is arranged approximately in the center between the optical axes of the condensing lens step 3. It has a structure in which a complementary color film 6 is coated.

In each of the above embodiments, the period of formation of the complementary color film 6 matches the period of formation of the condensing lens step 3, and
The formation position of the complementary color film 6 is shown as an example in which the formation position approximately coincides with the center between the respective optical axes of the condensing lens step 3; It can also be different from the period,
It is also possible to shift the formation position of the complementary color film 6 from the center between the optical axes of the condensing lens step 3. Further, the arrangement shape of the complementary color film 6 in front of the condenser lens step can be various shapes such as a band shape or a grid shape.

Further, in the above embodiments, a combination of a red outer lens 1 and a blue complementary color film 6 and a combination of a yellow outer lens 1 and a blue complementary color film 6 have been described. It goes without saying that depending on the purpose of implementation of such a lens device, it is possible to change to various color combinations that satisfy the complementary color relationship of absorbing the marker color and making it a dark color. In addition, the light beam collimating means is not limited to the parabolic mirror or Fresnel lens shown in the above embodiments.
It is also possible to use various optical means.

[Effect of idea]

Since the lamp device according to the present invention is configured as described above, when it is used, for example, as a marker light for automobiles, it does not cause a pseudo-lighting phenomenon even when outside light enters when it is not lit, and when it is lit it does not cause a false lighting phenomenon. It has excellent features such as the ability to increase the brightness ratio when not lit, and the practical effects of implementing the present invention are extremely large.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram of the main parts showing an embodiment of the lamp device according to the present invention, FIG. 2 is an explanatory diagram of the main parts showing the structure of the inner lens, and FIG. 3 is a schematic diagram of the main parts showing the structure of the inner lens. FIG. 4 is a side sectional view showing a second embodiment of the lamp device, and FIG. 5 is a side sectional view showing a third embodiment of the lamp device. DESCRIPTION OF SYMBOLS 1...Outer lens, 2...Inner lens, 3...Condensing lens step, 4...Translucent window, 5...Reflective film, 6...Complementary color film, 8...Light flux parallelizing means, 9 ...Lighting body, 11...Fresnel lens.

Claims (1)

[Scope of utility model registration request] It is equipped with a colored outer lens made of a translucent material and an uncolored inner lens made of a translucent material to be arranged behind the outer lens, and on the back side of the inner lens. The condensing lens steps are formed at a predetermined period, and a reflective coating of a predetermined width is formed on the surface side with the optical axis forming portion of each of the condensing lens steps serving as a light-transmitting window. A complementary color film is formed on the film surface to have a complementary color relationship with the coloring of the outer lens, and a light beam located behind the inner lens irradiates the light beam from the light source onto each of the above-mentioned condensing lens step formation surfaces as a parallel light beam. A lamp device comprising parallelization means.