JP3036596B1 - Display device - Google Patents

Abstract

Abstract: [Problem] To provide a display device capable of displaying a well-balanced transmissive display of the entire display unit at the time of transmissive illumination, even if there is a display portion having a small light emitting area at a position away from the optical axis of a light emitting diode. I do. SOLUTION: A display plate 4 provided with an engine oil symbol 14 which is a light-transmitting display portion is disposed in front of a light room 3 formed by partitioning a case 1 by a partition wall 2 and is provided behind the light room 3. Is provided with a light emitting diode 12 that is electrically connected to the printed wiring board 5 and emits red light. The display panel 4 has a ground color layer 15 made of black impermeable ink on the surface of a colorless and transparent substrate 13 except for the engine oil symbol 14. Then, a black semi-transmissive layer 16 is provided so as to cover the engine oil symbol 14, and a transparent matte non-reflective layer 17 is provided on the entire surface. On the rear surface of the substrate 13, a red transparent coloring layer 22 that is substantially the same as the emission color of the light emitting diode 12 is provided at a location corresponding to the other container display location 21 except for the drop display location 20 of the engine oil symbol 14. Further, a transparent light diffusion layer 23 for diffusing light from the light emitting diode 12 is provided at a location corresponding to the drop display location 20.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a display device for a vehicle, for example, and more particularly to a display device using a light emitting diode as a light source.

[0002]

2. Description of the Related Art Generally, a vehicle is provided with a display device A for displaying a turn signal display, a gear position display, various warning displays, and the like, and a display device B for displaying a speed, a fuel remaining amount, and the like. As shown in FIG. 4, the display devices A and B include a display panel 4 having a light-transmitting display section in front of a lamp chamber 3 formed by partitioning a case 1 by a partition wall 2.
And a light source, which will be described later, electrically connected to the printed wiring board 5 at the rear of the light room 3. When the light source is turned on, the display unit is visible.

Specifically, a speedometer (display B) is provided next to the warning display (display A).
Speedometer body 6 electrically connected to printed wiring board 5
And a lamp 7 are accommodated in the case 1 and a display plate 4 provided with a display for a speedometer scale, numerals, characters, etc. is fixed to the front of a speedometer main body 6. A pointer 8 is provided which rotates in response to the operation of the meter body 6. A return plate 9 for closing a gap between the display plate 4 and the case 1 is provided at a front peripheral edge of the display plate 4, and a front opening side of the case 1 is covered with a transparent protective cover 10. Reference numeral 11 denotes a cover that covers the back side of the printed wiring board 5. The display panel 4 for warning display and for the speedometer and the printed wiring board 5 are integrated with each other. As a light source for warning display, a light-emitting diode 12 having a small size and low heat generation, for example, a red color is used.

FIG. 5 shows a partial detailed cross section of a display panel 4 for warning display. The display panel 4 is provided with an engine oil symbol 14 serving as a warning display on the surface of a colorless and transparent substrate 13.
Except for, the ground color layer 15 is provided with black impermeable ink.
Then, a black semi-transmissive layer 16 is provided so as to cover the engine oil symbol 14, and a transparent matte non-reflective layer 17 is provided on the entire surface. Further, fine irregularities 18 for diffusing the light from the light emitting diode 12 are provided in a portion corresponding to the engine oil symbol 14 on the back surface of the substrate 13. Reference numeral 19 denotes when the light emitting diode 12 emits light,
It is a black light-shielding layer provided except for at least the portion corresponding to the engine oil symbol 14 so that the warning display portion adjacent to the inside through the inside is not visually recognized as light red. FIG. 6 is a view of the engine oil symbol 14 as viewed from the front.

[0005] In the display device A configured as described above, the engine oil symbol 14 is usually indicated by the black semi-transmissive layer 1.
6, the engine oil symbol 14 is displayed in red only when the pressure of the engine oil of the vehicle decreases and the light emitting diode 12 in the lamp chamber 3 emits red light.

[0006]

However, in the above conventional example, the light emitting diode 12 is used as a light source for warning display.
The directivity is strong, and the brightness tends to be low at a display location far from the optical axis. The above-described engine oil symbol 14 has a particularly small light emission area of the droplet display portion 20 that represents a droplet.
In addition to the visual problem, the display portion looks dim compared with the other display portions, that is, the container display portion 21 which looks like a container, and good visibility cannot be obtained.

In order to solve such a situation, there is a method of printing, for example, a light gray color on the container display portion 21 which is too bright other than the drop display portion 20, but in this case, the transmission luminance is reduced but the light gray is not printed. Since the color of the droplet display portion 20 was different, it was difficult to make the transmission luminance and the transmission color of the entire engine oil symbol 14 substantially uniform while adjusting the printing color.

The present invention has been made in view of such a point, and even if there is a display portion located at a position distant from the optical axis of the light emitting diode and having a small light emitting area, it is possible to obtain a c.
It is an object of the present invention to provide a display device capable of displaying the whole horning display section in a well-balanced transmission display.

[0009]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a display device having a display panel and a light emitting diode behind the display panel. A warning display unit provided on the front side or the back side of the substrate and including a display portion having a transparent coloring layer and a display portion having no transparent coloring layer having the same or similar color as the emission color of the light emitting diode. And this w
And a non-transparent ground color layer provided except for the warning display section, and a dark-color semi-transmissive layer covering at least the warning display section.

[0010] Also, a display device comprising a display plate and a light emitting diode behind the display plate, wherein the display plate is provided on a dark-colored semi-transmissive substrate, and on the back side of the substrate, A warning display portion in which a display portion having a transmissive coloring layer and a display portion having no transmissive coloring layer that are the same or similar to the emission color of the light-emitting diode are mixed, and a surface side of the substrate except for the warning display portion Or an impermeable ground color layer provided on the back surface side.

A display device comprising a display plate, a semi-transparent protective cover of a dark color covering the front of the display plate, and a light emitting diode behind the display plate, wherein the display plate has a light-transmitting property. And a display portion having a transparent coloring layer provided on the front side or the rear surface side of the substrate and having the same or similar color as the emission color of the light emitting diode and a display portion having no transparent coloring layer are mixed. It has a warning display section and an impermeable ground color layer provided except for the warning display section.

Further, a light diffusion layer is provided at least on a substrate corresponding to a display portion having no transparent coloring layer.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A display panel 4 provided with an engine oil symbol 14, which is a light-transmitting display section, is disposed in front of a lamp room 3 formed by partitioning a case 1 by a partition wall 2. A light emitting diode 12 of red emission color electrically connected to the printed wiring board 5 is provided behind the light emitting diode 3. The display panel 4 has a ground color layer 15 made of black impermeable ink on the surface of a colorless and transparent substrate 13 except for the engine oil symbol 14. A black semi-transmissive layer 16 is provided so as to cover the engine oil symbol 14, and a transparent matte non-reflective layer 17 is provided on the entire surface.
Is provided. On the rear surface of the substrate 13, a red transparent coloring layer 22 that is substantially the same as the emission color of the light emitting diode 12 is provided at a location corresponding to the other container display location 21 except for the drop display location 20 of the engine oil symbol 14.

With this configuration, even if there is a droplet display portion 20 located at a position distant from the optical axis of the light emitting diode 12 and having a small light emitting area, the transmitted light amount is attenuated without changing the color and transmitted. The transmission brightness and the transmission color of the entire engine oil symbol 14 during illumination are made substantially uniform, and the diffusion effect of the transparent coloring layer 22 itself is added, so that the entire engine oil symbol 14 can be transmitted and displayed in a well-balanced manner.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described with reference to each embodiment. The same or corresponding parts as those in the conventional example are denoted by the same reference numerals, and detailed description thereof will be omitted. FIG. 1 shows a display device A for warning display used in the first embodiment of the present invention, and has the same configuration as that of the conventional example. Optically transparent Waugh in front of the lamp chamber 3 formed by sectioning i.e. the casing 1 by partition walls 2
It disposed the display panel 4 provided with engine oil symbol 14 is a training display unit, emission color printed wiring board 5 and electrically connected to the rear of the lamp chamber 3 is provided with a red light-emitting diode 12, When the light emitting diode 12 emits light, the engine oil symbol 14 is visually recognized.
The display board 4 and the printed wiring board 5 may be integrated with another display device as in the conventional example, or may be separate bodies.

The display panel 4 has a ground color layer 15 made of a black impermeable ink on the surface of a colorless and transparent substrate 13 except for the engine oil symbol 14. Then, a black semi-transmissive layer 16 is provided so as to cover the engine oil symbol 14, and a transparent matte non-reflective layer 17 is provided on the entire surface. On the back surface of the substrate 13, a light emitting diode 1 is provided at a location corresponding to another container display location 21 except for the drop display location 20 of the engine oil symbol 14.
2 is provided with a red transmissive coloring layer 22 which is substantially the same as the emission color of No. 2. A transparent light diffusion layer 2 for diffusing light from the light emitting diode 12 is provided at a location corresponding to the drop display location 20.
3 is provided. 19 When the conventional example similar light-emitting diode 12 emits light, red light are adjacent through the substrate 13 c
It is a black light-shielding layer provided except for at least a portion corresponding to the engine oil symbol 14 so that the awning display portion is not visually recognized as light red.

In the display device A constructed as described above, the engine oil symbol 14 of the display panel 4 is usually hard to be visually recognized because the black semi-transmissive layer 16 is provided, as in the conventional example. The engine oil symbol 14 is displayed in red only when the light emitting diode 12 in the lamp chamber 3 emits red light due to a decrease in pressure.

As described above, the black semi-transmissive layer 16 is provided on the surface of the substrate 13 so as to cover the engine oil symbol 14 which is a warning display portion, and the drop of the engine oil symbol 14 is displayed on the back surface of the substrate 13. By providing a red transparent coloring layer 22 that is substantially the same as the emission color of the light emitting diode 12 at a location corresponding to the other container display location 21 except the location 20, the location is separated from the optical axis of the light emitting diode 12. Even if there is a drop display portion 20 having a small light emitting area in the position, the transmitted light amount is attenuated without changing the color to make the transmission luminance and the transmission color of the entire engine oil symbol 14 at the time of the transmission illumination substantially uniform. The diffusion effect of the transmissive coloring layer 22 itself is added, so that the entire engine oil symbol 14 can be transmissively displayed with a good balance.

Further, since the light diffusion layer 23 is provided at the drop display portion 20 where the red transparent coloring layer 22 is not provided, even if the drop display portion 20 is far from the optical axis of the light emitting diode 12, the light emitting diode The light from the engine oil symbol 12 can be diffused, and the entire engine oil symbol 14 can be transmitted and displayed in a well-balanced manner, which is more effective. Further, since the matte non-reflective layer 17 is provided on the surface of the display panel 4, reflection of external light on the surface of the display panel 4 is suppressed, and the display device can be easily viewed.

The red transparent coloring layer 22 is provided on the substrate 13.
It may be on the surface side of. The black semi-transmissive layer 16 is
3 or the impermeable ground color layer 15 or on the back side of the substrate 13. Further, the impermeable ground color layer 15 may be on the back side of the substrate 13. In short, it is only necessary that the black semi-transmissive layer 16 is located ahead of the red transmissive colored layer 22 and that the engine oil symbol 14 is not visible in red unless the light emitting diode 12 emits light in a normal use state. The light diffusion layer 23 does not necessarily need to be provided on the back side of the substrate 13, but the back side has a greater effect on diffusion than the front side of the substrate 13.

FIG. 2 shows a display panel 4 used in the second embodiment of the present invention, in which the substrate 13 is made of a black semi-permeable material. Except for the engine oil symbol 14, which is a warning indicator, a ground color layer 15 is provided on the surface of the substrate 13 with black impermeable ink, and a transparent matte non-reflective layer 17 is provided on the entire surface. As in the first embodiment, a red color which is substantially the same as the light emission color of the light emitting diode 12 is provided on the back surface of the substrate 13 at a location corresponding to the other container display location 21 except for the drop display location 20 of the engine oil symbol 14 as in the first embodiment. Transparent colored layer 2
2 is provided. Further, a transparent light diffusion layer 23 is provided at a location corresponding to the drop display location 20. 19 is a black light shielding layer. The impermeable ground color layer 15 may be on the back side of the substrate 13. With this configuration, the same effect as in the first embodiment can be obtained. Further, since the substrate 13 is made of a black translucent material, the black translucent layer 16 in the first embodiment can be omitted.

FIG. 3 shows a display panel 4 used in the third embodiment of the present invention. A black semi-permeable protective cover 10 (not shown) is provided in front of the display panel 4. That is, the transparent protective cover 10 shown in FIG. 4 is made of a black semi-permeable material. A ground color layer 15 is provided on the surface of the substrate 13 with black impermeable ink except for the engine oil symbol 14 which is a warning display. On the back surface of the substrate 13, similarly to the above-described embodiments, a portion corresponding to the other container display portion 21 except for the drop display portion 20 of the engine oil symbol 14 is provided with a red transmission which is substantially the same as the emission color of the light emitting diode 12. The coloring layer 22 is provided. Further, a transparent light diffusion layer 23 is provided at a location corresponding to the drop display location 20. 19 is a black light shielding layer. In addition, the red transparent coloring layer 22 may be on the surface side of the substrate 13. Also, the impermeable ground color layer 1
5 may be on the back side of the substrate 13. With this configuration, it is possible to obtain the same effects as those of the above embodiments. Further, since the black semi-transparent protective cover 10 is provided in front of the display panel 4, the display panel 4 itself cannot be visually recognized. Particularly, when the display panel A is used for a warning display, the warning display section is suddenly displayed. Emerges and the alerting effect as a warning increases.

In each of the above embodiments, an engine oil symbol as a warning display portion is formed by not providing an impermeable ground color layer, and the engine oil symbol is displayed in a transparent color in red. However, a display area ( warning display section) in which an impermeable ground color layer is not provided is formed, and, for example, an engine oil symbol is impermeable in this display area. A portion with and without a red transparent coloring layer may be provided around the engine oil symbol so that the entire periphery of the engine oil symbol is displayed in red by light emission of the light emitting diode.

[0024]

[0025]

According to the first to third aspects of the present invention, there is an effect that the amount of transmitted light is maintained at a position distant from the optical axis of the light emitting diode and the color is not changed even if there is a display portion having a small light emitting area. To attenuate the war
And substantially uniform transmissive brightness and transmitted color of the entire training display unit, further to join the diffusion effect of transmitting colored layer itself, the entire warning display good balance transmissive display is thereby it is possible.

According to the fourth aspect of the present invention, the light diffusion layer is provided at the display location where the transparent coloring layer is not provided, so that the light emission can be performed even at the display location away from the optical axis of the light emitting diode. The light from the diode can be diffused, and the entire warning display section can be transmitted and displayed in a well-balanced manner, which is more effective.

[Brief description of the drawings]

FIG. 1 is a partial sectional view of a display device showing a first embodiment of the present invention.

FIG. 2 is a partial sectional view of a display panel according to a second embodiment of the present invention.

FIG. 3 is a partial sectional view of a display panel according to a third embodiment of the present invention.

FIG. 4 is a sectional view of a display device for a vehicle.

FIG. 5 is a partial cross-sectional view of a display panel in a conventional example.

FIG. 6 is a front view showing engine oil symbols.

[Explanation of symbols]

4 Display Board 5 Printed Wiring Board 12 Light Emitting Diode 13 Substrate 14 Engine Oil Symbol ( Warning Display) 15 Ground Color Layer 16 Semi-Transmissive Layer 17 Non-Reflective Layer 20 Drop Display Location 21 Container Display Location 22 Transparent Colored Layer 23 Light Diffusion Layer

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) G01D 13/04 B60K 37/00 G01D 11/28 G09F 13/04 G09F 13/08

Claims (4)

(57) [Claims] 1. A display device comprising: a display plate; and a light-emitting diode provided behind the display plate, wherein the display plate is provided on a light-transmitting substrate and on a front side or a back side of the substrate. A warning display portion in which display portions having a transparent coloring layer and a display portion having no transparent coloring layer, which have the same or similar color to the emission color of the light emitting diode, coexist, and an opacity provided except for the warning display portion A ground-color layer, and a dark-colored semi-transmissive layer that covers at least the warning display section. 2. A display device comprising: a display plate; and a light-emitting diode provided behind the display plate, wherein the display plate is provided on a dark-colored semi-transmissive substrate, and on a back surface side of the substrate. a warning display unit which does not have a display portion of the display portion and transmitting colored layer having a transmitting colored layer is a light emitting color and the same or similar color of the light-emitting diodes are mixed, the Wo
And a non-transparent ground color layer provided on the front side or the back side of the substrate except for the tanning display section. 3. A display device comprising a display panel, a semi-transparent protective cover of a dark color covering the front of the display panel, and a light-emitting diode behind the display panel, wherein the display panel has a light-transmitting property. And a display portion having a transparent coloring layer provided on the front side or the rear surface side of the substrate and having the same or similar color as the emission color of the light emitting diode and a display portion having no transparent coloring layer are mixed. A display device comprising: a warning display section; and an impermeable ground color layer provided except for the warning display section. 4. The display device according to claim 1, wherein a light diffusion layer is provided on a substrate corresponding to at least a display portion having no transparent coloring layer.