JPH11180184A - In-vehicle display device - Google Patents

Abstract

(57) [Summary] [Problem] To provide an in-vehicle display device which is not restricted in design, has a long life, is excellent in visibility, and has an aesthetic appearance. SOLUTION: Excitation light reflected on an inclined surface of an upper end portion 91b of a light guide member 110 is emitted toward a center portion of a dial 100, and is irradiated on a surface of a pointer 101. Since a fluorescent paint is applied to the hands 101 in advance, the light applied to the hands 101 functions as excitation light, and the fluorescent paint emits red light to visually lift the hands 101 from the surroundings. In the dial 100, the flat portion 110 of the light guide member 110
Since the pale excitation light emitted from a is transmitted through the white paint 100c after being uniformly scattered by the milky white layer 100b,
The display pattern printed with the white paint 100c appears to be bluish white.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an in-vehicle display device mounted on a vehicle such as a motorcycle, and more particularly to an in-vehicle display device having a simple structure, excellent in earthquake resistance and visibility, and excellent in design. It relates to a display device.

[0002]

2. Description of the Related Art In a vehicle-mounted display device, it is known to improve the visibility of a display pattern by printing a display pattern on a dial with a fluorescent paint and irradiating it with ultraviolet light to emit light. It is described in JP-A-62-8134 or Utility Model Registration No. 2555254.

[0003]

In a structure in which a fluorescent paint is printed to improve visibility, an ultraviolet fluorescent lamp (black light) is installed in the instrument to excite a fluorescent agent contained in the fluorescent paint to emit light. Need to be installed. However, since an ultraviolet fluorescent lamp requires an expensive and relatively large-volume booster circuit, it can be used only for a luxury car or a large car. In addition, the fluorescent lamp has a fundamental problem that it is not suitable for being mounted on a motorcycle especially because of its low earthquake resistance.

Further, in the above-described structure in which the fluorescent paint is printed, black light is employed as the ultraviolet fluorescent lamp, so that only the light emitting portion on which the fluorescent paint is printed can be visually recognized at nighttime illumination. Therefore, there is a problem that the color tone is simple and the design is inferior.

An object of the present invention is to solve the above-mentioned problems of the prior art, and to provide an in-vehicle display device which is free from design restrictions, has a long life, is excellent in visibility, and has an aesthetic appearance. .

[0006]

In order to achieve the above-mentioned object, according to the present invention, there is provided an instrument section having a dial and a pointer, and a light source for irradiating the instrument section with excitation light for exciting a fluorescent agent. In the in-vehicle display device provided, the instrument unit is provided with a fluorescent unit that emits light by being irradiated with excitation light in a visible region, and a light emitting unit that is irradiated with the excitation light and passively emits visible light. It is characterized by the following.

According to the above configuration, the excitation light emitted from the light emitting source functions to excite the fluorescent part to emit light, and the light emitting part functions as visible light. On the viewing surface of the apparatus, a vivid color tone that emits light when irradiated with the excitation light and a pale color of the excitation light itself can be simultaneously viewed.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings. FIG. 1 is a front view of an instrument panel for a motorcycle to which the display device of the present invention is applied, and a left side and a right side thereof are provided with a speedometer 10 and a tachometer 20 according to an embodiment of the present invention, respectively. .

On the dial 100 of the speedometer 10, display patterns such as scales and numerals indicating the speed and characters indicating the unit of the speed are printed with a paint that is visually recognized as white under visible light. The surface of the pointer 101 is coated with a fluorescent paint that is visible in orange under visible light and emits red light in an excited state. Instead of applying the fluorescent paint, a fluorescent agent may be contained at least on the surface of the pointer 101. In the present embodiment, the dial 10
Liquid crystal display 1 for displaying mileage etc. within 0
03 is attached.

On the dial 200 of the tachometer 20, display patterns such as scales and numbers indicating the engine speed and characters indicating the unit of the speed are printed with white paint as in the case of the speedometer 10. I have. The surface of the hands 201 is also coated with an orange fluorescent paint, like the speedometer 10. In this embodiment, a red warning pattern 203 is printed in a red zone exceeding 8,500 revolutions.

FIG. 2 is a cross-sectional view of the speedometer 10 at a substantially central portion thereof. An annular portion 110b formed along the circumference of the portion 110a is formed of an acrylic plate or the like that is transparent to visible light, and the light guide member 110 is attached to the flat portion 110a of the light guide member 110. The dial 10
0, a hand driving unit 104 fixed to the light guide member 110 on the side opposite to the dial 100, and the hand driving unit 104
The pointer 101 driven by the
A circuit board 105 fixed to the light guide member 110 on the side opposite to the flat portion 110a,
and a light emitting diode (LED) 106 provided on the circuit board 105 so as to face one end of the light emitting diode b.

The light emitting diode 106 is, for example, a blue lamp NSCB100 manufactured by Nichia Corporation, and has an emission spectrum (wavelength) of 430 as shown in FIG.
0-5300 Angstroms and is restricted to the general visible range (3800-8000 Angstroms). It is desirable that the spectral characteristics of the fluorescent paint applied to the surface of the hands 101 and 201 and the excitation light emitted by the light emitting diode 106 do not overlap each other. Further, if the respective spectral characteristics show a complementary color relationship with each other, further improvement in visibility due to color contrast can be expected.

In the present embodiment, the height h of the ring 152 from the surface of the meter cover 151 is relatively high. Since the reflected light is scattered on the surface 152a, the visibility can be improved.

FIG. 3 is a perspective view of the light guide member 110, and FIG. 4 is a partially enlarged cross-sectional view for explaining the configuration and function of the light guide member 110. Represents.

As shown in FIG. 3, the annular portion 110b of the light guide member 110 has three substantially inverted triangular skirt portions 91, and the light emitting diode 106 has, as shown in FIG. The apex 91a of the skirt portion 91 is arranged to face the apex 91a. Apex 91a emitted from light emitting diode 106
The excitation light that has entered the light guide member 110 from the
10b while refracting inside, and a part thereof is a flat portion 110
is scattered into a. The upper end portion 91b of the annular portion 110b has an inclined surface, and the excitation light reaching the upper end portion 91b is reflected by the inclined surface and emitted to the outside. Also, the flat portion 110a
The excitation light that travels inside travels while refracting the interior, and a part of it is emitted to the outside. Furthermore, the light emitting diode 1
A part of the excitation light emitted from 06 passes directly through the flat portion 110a and escapes to the dial side.

Next, an embodiment of the present invention will be described in detail. FIG. 5 is a sectional view of a main part of the first embodiment of the present invention, and the same reference numerals as those described above denote the same or equivalent parts.

In this embodiment, the dial 100 attached to the flat portion 110a of the light guide member 110 is composed of a transparent acrylic plate 100a and a milky white layer 100b uniformly formed on the back surface thereof. Acrylic board 100a
On the surface of the is printed white paint 100c having light transmittance according to the shape of the display pattern such as scales and numbers,
In a region other than the display pattern, a black paint 100d having a light shielding property and a light absorbing property is printed.

In such a configuration, the excitation light emitted from the light emitting diode 106 and incident on the light guide member 110 from the vertex 91a is reflected by the inclined surface of the upper end portion 91b and is located at the center of the dial 100. The light is emitted toward the surface of the pointer 101. Here, since the fluorescent paint is applied to the surface of the hands 101 in advance, the light applied to the hands 101 functions as excitation light, and as a result, the fluorescent paint emits red light to visually surround the hands 101. Floating from.

On the other hand, the pale excitation light emitted from the flat portion 110a of the light guide member 110 to the outside is uniformly scattered by the milky white layer 100b on the back surface of the dial 100, and then passes through the white paint 100c. For this reason, on the surface of the dial 100, the display pattern printed with the white paint 100c appears to be bluish white.

As described above, in this embodiment, the light emitting diode is used as the light source of the excitation light, so that the display device is improved in earthquake resistance, and can be reduced in size and cost. Furthermore, in the present embodiment, the hands emit red light, so they are expressed in a vivid color tone, and the display patterns such as numbers and scales are expressed in pale colors by bluish transmitted light. That is, according to the present embodiment, the hands and the display pattern on the dial can be remarkable in different colors, so that the visibility and the appearance are improved.

Further, according to this embodiment, the display patterns such as hands and numerals show orange and white under visible light in daytime, and change to red and blue-white respectively at nighttime illumination. Visibility and appearance are further improved.

FIG. 6 is a sectional view of a main part of a second embodiment of the present invention, and the same reference numerals as those described above denote the same or equivalent parts. In this embodiment, a white paint 100e having no light transmittance according to the shape of the display pattern is formed on the surface of the transparent acrylic plate 100a constituting the dial 100.
Is printed, and a black paint 100d having no light transmittance is printed on the area other than the display pattern in the same manner as described above.

In such a configuration, the annular portion 110b
The excitation light reflected by the upper end 91b of the dial is emitted toward the center of the dial 100, and the dial 100 and the hands 101
The surface is irradiated. Here, since a fluorescent paint is applied to the hands 101 in advance, the light applied to the hands 101 functions as excitation light as in the first embodiment, and the hands 101 are caused to emit light by causing the fluorescent paint to emit light. To emit light.
On the other hand, the excitation light applied to the dial 100 is the white paint 1
Since the light is reflected by the display pattern printed at 00e, the display pattern appears to be raised on the surface of the dial 100.

As described above, in this embodiment, since the hands emit red light, they are expressed in a vivid color tone, and display patterns such as numbers and scales are expressed in a pale color by bluish transmitted light. That is, according to the present embodiment, the hands and the display pattern on the dial can be remarkable in different colors, so that the visibility and the appearance are improved.

Further, also in the present embodiment, the display patterns such as hands and numerals show orange and white under visible light in the daytime, and change to red and blue-white when illuminated, so that visibility and aesthetic appearance are further improved. improves.

FIG. 7 is a sectional view of a main part of a third embodiment of the present invention, and the same reference numerals as those described above denote the same or equivalent parts. The dial 100 of the present embodiment includes a transparent acrylic plate 100a and a milky white layer 100b uniformly formed on the back surface of the transparent acrylic plate 100a.
On the surface of a, red paint 100f having light transmittance is printed according to the shape of a display pattern to be displayed in red (for example, a warning pattern 203 indicating the red zone in the case of a tachometer), and is displayed in white. Light-transmissive white paint 100c is applied according to the shape of the display pattern such as the scales and numerals to be formed. A light-shielding black paint 100d is applied to regions other than the respective display patterns as in the above-described embodiments. On the back surface of the dial 100, a fluorescent paint 100g that emits white light in an excited state is printed at a position facing the red paint 100f.

In such a configuration, the excitation light reflected on the inclined surface of the upper end portion 91b is emitted toward the center of the dial 100, and illuminates the surface of the dial 100 and the hands 101. Here, since the fluorescent paint is applied to the surface of the hands 101 in advance, the light applied to the hands 101 functions as excitation light, and as a result, the fluorescent paint emits red light to visually surround the hands 101. Floating from.

The pale excitation light emitted to the outside from the flat portion 110a of the light guide member 110 is uniformly scattered by the milky white layer 100b on the back surface of the dial 100, and then the white paint 1
00c. For this reason, on the surface of the dial 100, display patterns such as characters and numerals printed with the white paint 100c appear to be bluish white.

Further, on the back surface of the dial 100, part of the excitation light emitted from the flat portion 110a of the light guide member 110 causes the fluorescent paint 100g to emit white light, and this emitted light irradiates the red paint 100f from the back surface. Therefore, the red paint 100f is visually recognized as emitting bright red light from the surface of the dial.

As described above, according to the present embodiment, the hands emit red light, so that the hands can be visually recognized as vivid colors. The display patterns such as numerals and scales can be visually recognized as pale white reflected light, as well as the red zone and the like. Since the emitted light is radiated from the back side to the red pattern shown, the red pattern can be visually recognized in a color tone different from that of the red emitted light or pale transmitted light.
In other words, the hands, the numbers and scales on the dial, and the red pattern can be remarkable in different colors.

[0031]

According to the present invention, the following effects are achieved. (1) A light source for irradiating the instrument panel with excitation light is provided,
The instrument panel is provided with a fluorescent section that emits light by being irradiated with excitation light in the visible region, and a light emitting section that is irradiated with the excitation light and passively emits visible light. A vivid color tone that emits light and a light color tone that is reflected light or transmitted light of the excitation light can be visually recognized at the same time, and visibility and aesthetic appearance are improved. (2) Since the light emitting diode is used as a light source of the excitation light, the seismic resistance is improved as well as visibility and aesthetic appearance, and further downsizing and cost reduction can be achieved.

[Brief description of the drawings]

FIG. 1 is a front view of an instrument panel for a motorcycle to which a display device of the present invention is applied.

FIG. 2 is a sectional view of a speedometer to which the present invention is applied.

FIG. 3 is a perspective view of a light guide member of the present invention.

FIG. 4 is a cross-sectional view for explaining the configuration and function of the light guide member of the present invention.

FIG. 5 is a sectional view of a main part of the first embodiment of the present invention.

FIG. 6 is a sectional view of a main part of a second embodiment of the present invention.

FIG. 7 is a sectional view of a main part of a third embodiment of the present invention.

FIG. 8 is a diagram showing an emission spectrum of an LED which is a light emission source.

[Explanation of symbols]

10 speedometer, 20 tachometer, 100, 200 dial, 100a transparent acrylic plate, 100b milky white layer,
100c: white paint, 100d: black paint, 101, 2
01: pointer, 104: needle drive unit, 105: circuit board, 1
06: light emitting diode, 110: light guide member

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code FI G09F 13/42 G09F 13/42

Claims (6)

[Claims] 1. An on-vehicle display device comprising: an instrument section having at least a dial and a pointer; and a light emitting source for irradiating the instrument section with excitation light for exciting a fluorescent agent, wherein the instrument section has a visible region. An in-vehicle display device comprising: a fluorescent portion that emits light by being irradiated with excitation light; and a light emitting portion that is irradiated with the excitation light and passively emits visible light. 2. The light emitting source is arranged near a dial,
2. The in-vehicle display device according to claim 1, further comprising light guide means for guiding and irradiating the front and back surfaces of the dial with excitation light emitted from the light emitting source. 3. The in-vehicle display device according to claim 1, wherein the fluorescent part is a pointer. 4. The in-vehicle display device according to claim 1, wherein the light emitting unit transmits the excitation light irradiated from the back through a dial. 5. The in-vehicle display device according to claim 1, wherein the respective spectral characteristics of the excitation light and the fluorescent portion do not overlap each other. 6. The in-vehicle display device according to claim 1, wherein the light emitting source is a light emitting diode.