JPH0447841Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a lamp device that has a different visible color when it is lit and when it is not lit, and particularly relates to a lamp device that is useful as a marker light for automobiles.

[Conventional technology]

Conventionally, for example, marker lights such as brake lights, turn signal lights, and reversing lights have been installed at the rear of automobiles, but each of these marker lights has a different lighting color, so they are generally separated into sections. The marker is constructed of a lamp device with a filter lens having a filter structure of different colors to generate a predetermined marker color.

[The problem that the idea attempts to solve]

Therefore, even when this type of lamp device is not lit, each color is emitted by the reflected light from the filter structure, and for example, the area around the sign light at the rear of a car has many different signal colors, which has led to restrictions on design. It was something I would receive.

The present invention was devised in view of the above-mentioned problems, and the purpose is to provide a lamp device that exhibits a different color tone when not lit than when lit. For example, in the case of a car sign light, etc. , the direction indicator lights installed in parallel with the brake lights should be structured so that they emit the same color (red) as the brake lights when they are not on, and a different color (orange) from the brake lights when they are on, or It is an object of the present invention to provide a lamp device that can emit a color that is the same or similar to that of a vehicle body when not lit, and can be lit in red when lit.

[Means to solve the problem]

The principle of the lamp device according to the present invention is that, as shown in FIGS. 1 and 2, a colorless condensing lens 1 made of a translucent material is provided with a first color having different width ratios on the front surface of the colorless condensing lens 1. A filter structure 3 consisting of a filter structure 2 and a second color (width of the first filter structure 2
p1, width p2 of the second filter structure 3) are formed alternately at a predetermined pitch P1 (=p1+p2), and both filter structures 2,
For example, the pitch P2 (=2
×P1), and each focal point F1 is formed near the forming surface of the filter structures 2 and 3, and the optical axis of the lens step 4 is
Lf is the formation width p1 of both filter structures 2 and 3,
Additive color mixing means 5 matched to pass through the center of p2
It constitutes. A parallel light beam L1 from a light source 6 located behind the additive color mixing means 5 is irradiated onto the surface of the condenser lens 1 via a light beam parallelizing means 7.

The filter structures 2 and 3 can be formed using a transparent paint of a first color and a second color, or of a transparent plate having a first color and a second color.

Further, as the light beam parallelizing means 7, when the light source 6 is a point light source such as a light bulb, a parabolic mirror or a Fresnel lens whose focal point F2 is the position of the light source,
Alternatively, this can be achieved by a combination of the two.

[Effect]

Therefore, the first filter structure 2 is red, the second filter structure 3 is yellow, and the formation width p1 is
>p2, the structure shown in FIG. 1 is obtained.

When this lamp device is not lit, the forming width is
Since p1>p2, the reflected light from the external light incident from the outside of the transparent outer lens 5 has a large amount of red reflected light from the first filter structure 2 having a wide formation width, and is perceived as red.

When the lamp device is turned on, the light beam L1 emitted from the light source 6 and collimated by the light beam collimating means 7 passes through each lens step 4 and the filter structures 2 and 3 made of red and yellow and is visually recognized. Become so. At this time, the light beams L2 and L3 refracted by the lens step 4 are directed toward the optical axis of the lens step 4.
Since Lf is configured to pass through the center of the red and yellow filter structures 2 and 3 and corresponds to the focal point F1, the light fluxes L2 and L3 are approximately equal in amount.
becomes transparent with the red and yellow translucent paints 2 and 3.

Therefore, the proportion of the luminous flux L2 transmitted through the red filter structure 2 is equal to the luminous flux L3 transmitted through the yellow filter structure 3, and as shown in FIG. 3, the spectral characteristics of the filter structure, both transmitted lights are When mixed, it becomes orange (amber).

However, according to the principle of the present invention, even if the ratio of the luminous flux L2 that passes through the red filter structure 2 and the ratio of the luminous flux L3 that passes through the yellow filter structure 3 is changed, both transmitted lights are mixed and an orange color of other hue is produced. Therefore, the width of the lens step 4 can be made alternately large and small to correspond to the pitch P1 consisting of the filter structures 2 and 3.

〔Example〕

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

4 and 5 show an embodiment in which a parabolic mirror is used as the beam collimating means 7, and the bottom inner surface of the lamp body 10 is a parabolic curved surface with a focal point F2, The inner surface is processed into a light reflecting mirror surface 11. The light source 12 for lighting a light bulb etc.
The lamp body 10 is positioned at the focal point F2 above.
The additive color mixing means 5 is arranged in parallel inside a transparent outer lens 13 which is attached to the lamp body 10 and is provided on the opening surface of the lamp body 10. The additive color mixing means 5, as shown in the explanation of the principle above,
A red light-transmitting paint 2 forming a filter structure is placed on the front surface of a colorless condensing lens 1 made of a light-transmitting material.
(Application width p1) Same as yellow translucent paint 3 (Application width p1)
p2) are alternately formed with the smallest possible pitches P1 (=p1+p2) so that p1>p2, and the coating pitches P1 of both the translucent paints 2 and 3 are formed on the back surface of the condenser lens 1. For example, 2 times the pitch P2
(=2×P1) and each focal point is near the coated surface of both translucent paints 2 and 3, and the optical axis Lf of the lens step 4 is The structure is such that the coating widths p1 and p2 of the photosensitive paints 2 and 3 correspond to each other so as to pass through the center.

Next, FIGS. 6 to 8 show the beam parallelizing means 7.
This shows an example using a Fresnel lens, in which a lighting light source 12 is fixedly installed on the bottom inner surface of the lamp body 10a, and a transparent outer lens 13 is installed on the opening surface of the lamp body 10a. Become. The additive color mixing means 5 is arranged in parallel inside the outer lens 13.
A Fresnel lens 14 is arranged in parallel behind the light source 12 and has a focal point F2 at the position of the light source 12. As explained in the above principle, the additive color mixing means 5 is a colorless material made of a translucent material in order to have the same color as a turn signal light of a car when it is not lit, and a white backlight when it is lit. On the front surface of the condenser lens 1, a section of light blue-green translucent paint 3 is applied on a base of orange (amber) translucent paint 2 at a certain pitch.
P1 is applied alternately (see Fig. 8), and both translucent paints 2,
For example, the pitch P2 (=2
×P1), and each focal point F1 is formed in parallel in the vertical and horizontal directions, and the optical axis Lf of the lens step 4 is parallel to the above-mentioned translucent paints 2 and 3. The structure is such that the photosensitive paints 2 and 3 pass through the center of the application area.

In this configuration, when the light source 12 is turned on, it exhibits the spectral characteristics of a translucent paint as shown in FIG. It can be assimilated with the color of the turning light.

In the above embodiments, explanations have been given of the combination of red and orange, and the combination of orange and light blue-green, but the present invention has different configurations depending on the purpose of implementation.
It goes without saying that the combination of colors can be changed in various ways. In addition, the light beam parallelizing means 7
has a structure in which parallel light beams are irradiated to the additive color mixing means 5, and various optical means can be used in addition to the parabolic mirror or Fresnel lens shown in the above embodiments, and their combinations.

Further, in the above embodiment, the filter structure is formed of a film of transparent paint, but it is also possible to have a structure in which filters such as resin-molded transparent plates are arranged side by side.

[Effect of idea]

Since the lamp device according to the present invention is configured as described above, it can exhibit a different color tone when not lit than when lit. It is possible to match the color of the sign light or the car body color, making it possible to reduce the number of colors around the sign light at the rear of the car, and eliminating restrictions on design due to the color of the sign. , it has excellent characteristics, and the practical effects after implementation of the present invention are extremely large.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram showing the principle of the lamp device according to the present invention, Fig. 2 is a front view showing the additive color mixing means, and Fig. 3 shows the spectral characteristics of the filter structure in the first embodiment of the additive color mixing means. 4 is a side sectional view showing the first embodiment of the lamp device, FIG. 5 is an enlarged sectional view of the same essential parts, and FIG. 6 is a side sectional view showing the second embodiment of the lamp device. FIG. 7 is an enlarged front view of the main part showing the additive color mixing means, and FIG. 8 is a graph showing the spectral characteristics of the translucent paint in this example. 1...Condensing lens, 2, 3...Translucent paint, 4
...Lens step, 5...Additive color mixing means, 6...
...Light source, 7... Luminous flux parallelizing means, 10, 10a...
...Lamp body, 11...Light reflecting mirror surface, 12...
Light source, 13... Outer lens, 14... Fresnel lens.

Claims (1)

[Scope of utility model registration request] A filter structure consisting of a first color (width p1) and a second color (width p2) with different width ratios is placed on the front surface of a colorless condensing lens made of a translucent material at a predetermined pitch P1 (= p1 + p2). ), and
On the back surface of the above-mentioned condensing lens, each condensing type lens step is formed, corresponding to the pitch P1 of the above-mentioned both filter structures, and each focal point is near the formation surface of both filter structures, and the optical axis of the lens step is located in the vicinity of the forming surface of both filter structures. and a light beam collimating means for irradiating a light beam from a light source located behind the additive color mixing means onto the condenser lens surface as a parallel light beam. A lamp device featuring: