JPH0683274A - Light emitting display device - Google Patents

Abstract

PURPOSE:To enable the stereoscopic display of display marks by forming numerous fine light transmission holes on a transit layer and forming these light transmission holes in such a manner that the light transmission areas thereof are larger in the regions corresponding to the central part of the display marks than the regions corresponding to the peripheral edges of the display marks. CONSTITUTION:The numerous fine light transmission holes 4a scatter on a half mirror 4 formed on a transparent substrate 3 of the light emission display device provided with the transparent substrate 3 which is arranged on the front surface side of a light source 1 and is formed with the half mirror 4 on the surface thereof and a display member 5 which is arranged on the front surface side of the transparent substrate 3 and has the light transparent display marks 5a. These light transmission holes 4a are so formed that the light transmission areas are larger in the regions corresponding to the central part of the display marks 5a than the regions corresponding to the peripheral edges of the display marks 5a. Namely, the light transmission holes 4a are larger in the number in the regions corresponding to the central part of the display marks 5a than the regions corresponding to the peripheral edges thereof or the large light transmission holes 4a are formed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light emitting display device for displaying various marks such as characters and figures by light emission.

[0002]

2. Description of the Related Art Conventionally, a light emitting display device has been used as an ornament for displaying a mark such as a vehicle type in an automobile. An example of the configuration is shown in FIG. 4, which is a cross-sectional view of a main part. In the figure, 11 is a light source configured by using an electroluminescence element or the like that emits light by turning on a power switch (not shown) and applying a voltage, 12
Is a casing for housing the light source 11. 13 is
A semi-transparent substrate which is a transparent substrate arranged on the front surface of the light source 11, and a half mirror 14 made of a metal vapor-deposited surface of chromium or the like transmits a part of light and reflects the rest on the surface of the transparent substrate 13. It is formed as a layer. Further, reference numeral 15 is a display member formed of a transparent resin as having a display mark 15a having a protruding portion having a shape to be displayed, and a light shielding layer 15b is formed on a portion excluding the display mark 15a. The display member 15 is fixed to the casing 12 so as to cover the transparent substrate 13.

According to the above configuration, the half mirror 1 is used during the daytime.
The display mark 15a is displayed by external light reflection at 4, and at night, the power is turned on to irradiate the transparent substrate 13 with light from the light source 11, and the light transmitted through this substrate 13 and the half mirror 14 causes the display mark 15a to be displayed. The display of 15a is performed.

[0004]

However, in this light emitting display device, since the half mirror 14 is formed on the back side of the display mark 15a, the display mark 15a is formed three-dimensionally, but at night. In addition, there is a problem that when the light source 11 is made to emit light, the mark 15a looks flat in a recessed position.

Therefore, the technical problem to be solved by the present invention is to stereoscopically display marks in this type of light emitting display device.

[0006]

A light emitting display device according to the present invention includes a light source, a transparent substrate arranged on the front side of the light source and having a semi-translucent layer formed on the surface, and arranged on the front side of the transparent substrate. And a display member having a light-transmissive display mark, and in order to solve the above-mentioned technical problem, innumerable minute light-transmissive holes scattered in a semi-transmissive layer are formed. The light transmitting hole is formed such that the light transmitting area is larger in the region corresponding to the central portion of the display mark than in the region corresponding to the peripheral portion of the display mark.

[0007]

In the above structure, since the light transmission holes are minute and scattered, the semi-translucent layer acts like a continuous surface in the daytime, and external light is reflected on the surface to display the light. The entire mark is displayed in metallic color. At that time, since the amount of reflected light is larger in the peripheral portion than in the central portion of the display mark, the metal color in the central portion is lighter than in the peripheral portion. Also, when the power is turned on at night, the amount of light emitted from the display mark is larger in the central part of the display mark than in the peripheral part, so the central part of the display mark is bright and the peripheral part is slightly darker than that. It emits a metallic color.

[0008]

[Effects] According to the above-described structure, since the light transmission holes are formed in the semi-translucent layer with different densities, the display color of the display mark is different between the central portion and the peripheral portion, and thus the display mark is different. Can be displayed three-dimensionally.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The light emitting display device according to one embodiment of the present invention shown in FIGS. 1 to 3 will be described in detail below.

FIG. 1 is a sectional view of the main part of this light emitting display device. Similar to the one described as the prior art, 1 is a light source configured by using an electroluminescence element or the like that emits light by turning on a power switch (not shown) and applying a voltage, and 2 is a casing for housing the light source 1. Is. Reference numeral 3 denotes a substrate made of a transparent resin disposed on the front surface of the light source 1. On the surface of the transparent substrate 3, a half mirror 4 made of a metal vapor deposition surface of chromium or the like is formed as a semi-transparent layer. There is. Reference numeral 5 is a display member formed of a transparent resin having a display mark 5a protruding in a shape to be displayed, and a light shielding layer 5b is formed on a portion excluding the display mark 5a. The display member 5 is fixed to the casing 2 so as to cover the transparent substrate 3. In addition,
The half mirror 4 may be formed not only on the front side of the transparent substrate 3 but also on the back side.

Half mirror 4 formed on the transparent substrate 3
Has innumerable minute light transmission holes 4a scattered (for convenience of drawing, the half mirror 4 and the light transmission holes 4a are shown enlarged). The light transmitting hole 4a is formed so that the light transmitting area is larger in the region corresponding to the central portion of the display mark 5a than in the region corresponding to the peripheral portion of the display mark 5a. That is, the area corresponding to the central portion of the display mark 5a has a larger number of light transmitting holes 4a or the light transmitting holes 4a are larger than the area corresponding to the peripheral portion of the display mark 5a.

The light-transmitting holes 4a are formed on the surface of the half mirror 4 formed on the transparent substrate 3 by a method such as vapor deposition or sputtering by screen printing or gravure printing using transparent ink or the like, and scattered fine points, Alternatively, it can be formed by forming fine lines having a stripe shape or a lattice shape, and further performing etching using these as a mask to remove a part of the half mirror 4.

According to this embodiment, innumerable minute light-transmitting holes 4a are formed in the half mirror 4. However, since the light-transmitting holes 4a are minute and scattered, the half mirrors 4 are formed in the daytime. It acts as if it were a continuous surface, external light is reflected on the surface, and the display mark 5a is displayed in a metallic color. At that time, since the amount of reflected light is larger in the peripheral portion than in the central portion of the display mark 5a, the metal color in the central portion is lighter than in the peripheral portion. When the power is turned on at night, the light emitted from the light source 1 and transmitted through the transparent substrate 3 causes the central portion of the display mark 5a to be bright and the peripheral portion to be slightly darker than that. Therefore, the display mark 5a is stereoscopically displayed both day and night.

A display example of the display mark 5a according to this embodiment is shown in FIGS. FIG. 2 shows an example in which the light-transmitting hole 4a at the peripheral portion of the display mark 5a is formed in a relatively "rough" shape with a substantially constant width. On the other hand, FIG. 3 shows an example in which the width of the portion where the light transmission hole 4a is formed to be relatively "rough" is changed so that this portion looks like the shadow of the display mark 5a. In the case of FIG. 2 as well, the display mark 5a is displayed three-dimensionally, but by forming it as shown in FIG. 3, the display mark 5a can be displayed more three-dimensionally.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of main parts of a light emitting display device according to an embodiment of the present invention.

FIG. 2 is a diagram showing a display state of display marks.

FIG. 3 is a diagram showing a display state of display marks according to a modification.

FIG. 4 is a cross-sectional view of a main part of a light emitting display device according to a conventional example.

[Explanation of symbols]

1 light source 2 casing 3 transparent substrate 4 half mirror (semi-translucent layer) 4a light transmitting hole 5 display member 5a display mark 5b light shielding layer

Claims (1)

[Claims] 1. A light source (1), and a transparent substrate (3) arranged on the front side of the light source (1) and having a semi-translucent layer (4) formed on the surface thereof.
A light emitting display device comprising a display member (5) arranged on the front surface side of the transparent substrate (3) and having a translucent display mark (5a), wherein the semitranslucent layer (4) is scattered. Countless minute light transmission holes (4
a) is formed, and the light transmission hole (4a) has the above-mentioned display mark (5a).
A light-emitting display device, which is formed to have a larger light-transmitting area in a region corresponding to a central portion of the display mark (5a) than a region corresponding to a peripheral portion of the display mark (5a).