JPH0441517Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Field of Application> The present invention relates to a so-called illumination device for backlighting the front operation section of in-vehicle audio equipment such as a cassette tape player or a CD player.

<Prior art> In-vehicle audio equipment such as cassette tape players and CD players are illuminated with high brightness and multicolors on the front operation parts, especially the liquid crystal display panel, knob buttons, etc., for ease of operation and appearance design. . In this lighting method, a liquid crystal display panel, a knob button, etc. are usually each provided with an individual light source to directly illuminate them.

<Problems with the prior art> However, according to the above-mentioned lighting method, in order to color-code the liquid crystal display board and the knob buttons to provide so-called multi-color backlighting, the light source and optical path must be provided with branches. A large amount of space is required to arrange the light source, leading to a rise in costs.

<Means for solving the problem> This invention was devised in view of the problem.
A single light source is placed at the rear of the audio equipment, and the light beam from this light source is guided through a light guide to a light guide installed in the front operation section, and the light guide is equipped with multiple color filter switching devices. The front operating section is illuminated by switching the light source of the light guide to multiple colors.

<Function> In other words, even if the light source itself is installed at the back of the audio equipment, away from the front operation section, the light beam can be switched and guided into multiple colors using the light guide and switching device, allowing for a front operation with rich design. can form a section.

<Example> The illumination device of the present invention will be described in detail below based on the drawings.

FIG. 1 is a schematic plan view of a vehicle-mounted audio device 1 provided with the illumination device of the present invention, and FIG. 2 is a schematic side view of the same.

The in-vehicle audio device 1 houses, for example, a cassette tape deck 11 therein, and a front operation section 12.
A cassette tape is inserted and ejected from a cassette tape insertion opening 13 provided in the cassette tape.

The front operation section 12 is provided with illumination sections 14a and 14b such as a liquid crystal display board and knob buttons. A light box 2 is provided on one side of the cassette tape deck 11 and at the rear. This light box 2 has a heat dissipating section 21 and a light condensing section 22 formed by processing aluminum. The heat dissipation section 21 is formed by a plurality of fins to improve the efficiency of heat dissipation. The condensing section 22 forms a so-called concave mirror, and a light source L is disposed at its focal position. As the light source L, a halogen lamp or a xenon lamp with a large amount of light is used. Further, an infrared absorption filter 3 is disposed in front of the light source L, and the infrared rays of the light rays from the light source L are absorbed and become low-heat rays. The light is then guided to a rear light guide 4 and a front light guide 5 provided opposite to the infrared absorption filter 3. The rear light guide 4 and the front light guide 5 are made of transparent acrylic resin with a mirror finish, for example, or made of a plurality of glass fibers, and are highly efficient by totally reflecting the incident light beam. Forms a light path. Figures 1 to 5
As shown in the figure, the front light guide 5 is divided into upper and lower parts to form two branch light guides 5A and 5B, and a light guide is placed in front of the branch light guide 5A.
A light guide G ₂ illuminates the illumination part 14a through G ₁ and has another branch light guide 5B disposed in front thereof.
The illumination section 14b is illuminated through the light source.

On the other hand, a first color filter switching device 6 is disposed between the rear light guide 4 and the front light guide 5, and the front light guide 5 itself has, for example, a pair of upper and lower second and third color filter switching devices. 7 and 8 are arranged. That is, the first color filter switching device 6
The light beam passing through is colored by the second color filter switching device 7 and introduced into the branching light guide 5A, and illuminates the illumination section _14a via the light guide G1. Similarly, the first color filter device 6
The light beam that has passed through is colored by the third color filter switching device 8, reaches the branching light guide 5B, and illuminates the illumination section 14a via the light guide _G2 .
Therefore, as shown in FIG. 6, the front operation section 12 is illuminated by the respective illumination sections 14a and 14b in the colors colored by the respective color filters.

Next, a case will be described in which the front operation section 12 is displayed in the same or different colors.

First, if the front operation unit 12 is to be illuminated with the same color (for example, amber color), the first color filter switching device 6 colors the light beam in amber color,
The second and third color filter switching devices 7 and 8 are switched to transparent filters. Then, the illumination part 14
a and 14b are illuminated in amber color by the first color filter switching device 6, respectively. Conversely, if the first color filter switching device 6 is switched to a transparent filter without coloring, and the color filters of the second and third color filter switching devices 7 and 8 are respectively switched to amber color, the same result can be obtained. Each illumination section 14a, 14b is illuminated in amber color.

Furthermore, in the case where the front operation unit 12 is illuminated with different colors (for example, amber color and green color), the first color filter switching device 6 is a transparent filter, and the second and third color filter switching devices 7 are used. , 8 may be switched to a different color, either amber or green. Furthermore, if the first color filter switching device 6 is made of a semi-transparent filter, it is possible to illuminate in a deep amber color or green color.
In any case, by switching the first, second, and third color filter switching devices 6, 7, and 8 to appropriate transparent and color filters, the front operation unit 12 can of course change the lamp color of the light source L. , and will be illuminated in various colors such as amber and green.

<Effects of the Invention> As described above, the illumination device of the present invention can illuminate the front operation section in multiple colors by coloring the light beams from the light sources placed at the rear of the audio equipment using a plurality of color filter switching devices. This will enrich the color design of the front operation section, giving it an even more luxurious feel.

[Brief explanation of the drawing]

FIG. 1 is a schematic plan view of an in-vehicle audio device equipped with a lighting device according to the present invention, FIG. 2 is a schematic side view of the same, and FIG. 3 is a schematic front view showing the arrangement of the light guide. Fig. 4 is a partially omitted plan view showing the arrangement of light guides, Fig. 5 is a partially omitted plan view showing the arrangement of other light guides, and Fig. 6 is a partially omitted plan view showing the arrangement of the light guides. It is a front schematic diagram. 1...In-vehicle audio equipment, 12...Front operation unit,
14a, 14b... Lighting part, 2... Light box, 21... Heat dissipation part, 22... Light collecting part, 3... Infrared absorption filter, 4... Rear light guide, 5... Front light guide, 5A , 5B... Branch light guide, 6... First
color filter switching device, 7...second color filter switching device, 8...third color filter switching device, _G1 , _G2 ...light guide, L
……light source.

Claims (1)

[Claims for Utility Model Registration] A light source is disposed within an audio device, and a light beam from the light source is guided by a light guide to illuminate the front operation section of the audio device, wherein the light guide includes a filter. At least two holding color filter switching devices are provided so as to block the optical path of the light guide, and after the light beam from the light source passes through one of the color filter switching devices, it further passes through the other color filter switching device. 1. A lighting device for a vehicle-mounted audio device, characterized in that the lighting device reaches the front operation section.