JPH0650935Y2 - Fluorescent display - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a display device provided on an instrument panel of a car and a self-luminous fluorescent display device useful as a display device for audio products. The present invention relates to a fluorescent display device capable of a certain stereoscopic display.

[Conventional technology]

In Japanese Utility Model Application Laid-Open No. 56-54563, a fluorescent display device having a structure in which two fluorescent display tube portions are stacked to improve the display density of the display surface is known.

When the display density is increased and the display pattern is complicated on one substrate, it becomes difficult to lay out the wiring, but the conventional device is designed to avoid this problem. That is, a transparent window is provided in a part of the front fluorescent display tube,
A second fluorescent display tube is provided on the back side thereof to form a display device having a single display surface.

[Problems to be solved by the device]

The above-mentioned display device has a two-dimensional structure, and the front side display and the back side display do not overlap with each other, and a three-dimensional display with a sense of depth cannot be performed. In addition, the back shadow of the display was only black of the insulating layer, which lacked aesthetics.

[Means for Solving the Problems]

The present invention provides a fluorescent display device in which a stereoscopic display with a sense of depth can be performed by displaying the image in front of the background overlaid on the back shadow, and the background overlapping the display in the front can be easily colored or dynamically displayed. It is an object.

In order to achieve the above object, the fluorescent display device of the present invention comprises:
A front emission type fluorescent display tube and a direct-viewing type fluorescent display tube are provided. The front emission type fluorescent display includes a transparent first substrate, a wiring conductor made of a transparent conductive film provided on the surface of the first substrate, an anode conductor provided on the surface of the first substrate, and the anode conductor. An anode having a light-transmitting property, which is formed of a phosphor layer, and a linear cathode stretched so as to face the anode;
A transparent back plate having a predetermined thickness and facing the substrate is provided, and an emission display of the phosphor layer is observed through the first substrate.
The direct-view fluorescent display is provided on the second substrate, a wiring conductor and an anode conductor provided on the surface of the second substrate, an insulating layer that covers the wiring conductor leaving the anode conductor, and the anode conductor. A phosphor layer, a linear cathode stretched to face the phosphor layer, and a transparent front plate facing the second substrate with the same thickness as the back plate of the front emission type fluorescent display tube. The front plate is disposed close to the rear plate of the front emission type fluorescent display tube at the same interval as the thickness of the front plate.

[Action]

The light emission of the phosphor layer of the rear fluorescent display tube is observed as a back shadow through the front plate and the front surface emission type fluorescent display tube in the front. Then, the light emission of the anode of the front emission type fluorescent display tube in the front is observed from the front through the transparent substrate. Here, the light emitted from the anode is reflected forward by the inner and outer surfaces of the back plate of the same display tube and the outer and inner surfaces of the front plate of the fluorescent display tube located at the rear thereof, and the respective reflected images of these are reflected by the transparent substrate. Through the front, and the reflected image directly overlaps with the real image directly irradiated from the anode, and the reflected image in the back becomes darker. The display of the fluorescent display tube can be seen as if it pops out forward with respect to the back shadow in the back, giving a three-dimensional effect.

〔Example〕

As shown in FIG. 1 and FIG. 2, the fluorescent display device 1 of the present embodiment has a front emission type fluorescent display tube 2 (hereinafter, referred to as FLVFD2) which is disposed in the front and displays information, and in the rear. The direct-view fluorescent display tube 3 (hereinafter referred to as VFD3) is provided and displays a back shadow for giving a three-dimensional effect.

First, the configuration of FLVFD2 will be described. As shown in FIG.
On the substrate 4 as a transparent first substrate such as glass, for example,
The wiring conductor 5 and the anode conductor 6 are formed by a method such as photolithography using a transparent conductive film made of ITO (Indium Tine Oxide). The pattern of the wiring conductor 5 may be linear or planar. The anode conductor 6 has a pattern having a minute gap 7. For example, a comb shape, a stripe shape, or a mesh shape is used. Then, the phosphor layer 8 made of ZnO: Zn is deposited only on the surface of the anode conductor 6 by the electrodeposition method. Therefore, in the FLVFD 2 of the present embodiment, the anode 9 composed of the anode conductor 6 and the phosphor layer 8 emits light from the phosphor layer 8 as the anode conductor 6.
Of course, it can be observed from the transparent substrate 4 side through
Since the anode 9 itself has a light-transmitting property, light emission in the back of the anode 9 can be observed through the anode 9.

In this example, both the wiring conductor 5 and the anode conductor 6 were formed of transparent conductive films, but as described above, the anode conductor 6 was used.
If the pattern is to have a minute gap 7, only the anode conductor 6 may be formed of a thin metal film such as Al having no light transmitting property. If the anode conductor 6 is formed of a transparent conductive film as described above, the solid conductor anode conductor 6a is formed as shown in FIG. The layer 8a may be formed in a pattern such that minute gaps 7a are formed.

Although not shown, a mesh-shaped control electrode is provided so as to face the phosphor layer 8 of the anode 9, and a linear cathode is stretched above the control electrode. Then, a box-shaped container portion including a side plate and a transparent rear plate 10 is sealed on the substrate 4.

Next, the configuration of the VFD3 behind the FLVFD2 will be described.

An Al thin film is formed on a substrate 11 made of glass or the like as a second substrate, and a wiring conductor and an anode conductor are formed in a predetermined pattern by a photolithography method. With the anode conductor left, a black insulating layer 12 is deposited on the surface of the substrate 11 to cover the wiring conductor. Then, a sulfide-based color phosphor layer 13 is formed on the anode conductor.
Is deposited to obtain the anode 14.

In this embodiment, this pattern of anode conductors (ie anode 14
The color display pattern) is substantially equal to or larger than the display area of the FLVFD2. As a result, the display pattern of the anode 9 of the FLVFD2 and the color display pattern of the anode 14 of the VFD3 overlap each other, and the display pattern of the VFD3 at the back is the shadow of the display pattern of the FLVFD2. Particularly, in this embodiment, the display pattern of the VFD 3 is a fluid strip-shaped pattern in which the depth is emphasized as shown in FIG.

Although not shown, a mesh-shaped control electrode and a linear cathode are provided facing the phosphor layer 13 of the anode 14. Further, the container portion including the side plate and the transparent front plate 15 is sealed to the substrate 11.

Then, as shown in FIG. 2, the thickness a of the back plate 10 of the FLVFD2 is made equal to the thickness a of the front plate 15 of the VFD3, and the FLVF
The distance between the rear plate 10 of D2 and the front plate 15 of VFD3 should be a.
Arrange with FLVFD2 and VFD3.

In the above configuration, VFD3 and FLVFD2 are caused to emit light.
First, as shown in Fig. 2, the phosphor layer of VFD3 on the rear side.
The light emission of 13 is the back shadow c through the front plate 15 and the front FLVFD2.
Be observed as.

Then, the light from the pattern of the anode 9 of the FLVFD 2 displaying information displays a real image b through the substrate 4 as shown by an arrow b in FIG. 2, and the inner and outer surfaces of the back plate 10 of the FLVFD 2 and the spine of the VFD 3 are displayed. The reflection images b1, b2, b3, b4 are formed by reflecting on the inner and outer surfaces of the face plate 15, respectively. The real image b and the reflection images b1 to b4 are seen by an observer in an overlapping manner at regular intervals, and the brightness of the reflection image decreases as the distance from the real image increases. That is,
The brightness is b>b1>b2>b3> b4, and the display appears to rise from the rear. Further, since the back shadow c by VFD3 is seen beyond the display pattern of FLVFD2 in the back of such a display, the display of FLVFD2 for displaying information has a three-dimensional effect as if it protrudes forward from the back shadow in the back. It will be.

In the above embodiment, the FLVFD2 and the VFD3 are provided with a space corresponding to the thickness of the back plate 10, but the back plate 10 of the FLVFD2 and the back plate 15 of the VFD3 may be closely attached. With this, FLVF
One less reflected image of the pattern of the anode 9 of D2,
There is no change in obtaining a three-dimensional effect. Further, the light emitting display becomes clearer if the side peripheral surfaces of FLVFD2 and VFD3 and the side peripheral surfaces of the gaps between them are covered with a light shielding member to prevent light from entering.

In the embodiment described above, the light emitting layer 8 of FLVFD2 is ZnO: Zn.
The phosphor layer 13 of VFD3 was made of various sulfide-based phosphors. Here, it is known that various sulfide-based phosphors are decomposed together with light emission by being bombarded with an electron beam to generate sulfide-based gas. It is also well known that if the sulfide-based gas adheres to the surface of a non-sulfide-based phosphor such as ZnO: Zn or the cathode, the emission brightness of the anode will be reduced.

Therefore, in this embodiment, in order to obtain a three-dimensional display and to minimize the adverse effect of the decomposition gas of the sulfide-based phosphor as described above, the sulfide-based phosphor and the non-sulfide-based phosphor are separated. However, the VFD3 on the back side has a sulfide-based phosphor layer.
14 is provided, and the non-sulphide phosphor layer 8 is provided on the front FLVFD2.
Is provided so as not to reduce the display brightness of the FLVFD2 displayed as information.

Next, another display example of the back shadow by the VFD 3 will be described.

First, the FLVFD2 displays information such as a digital speedometer and a digital oil meter, and the VFD3 displays a color shift pattern as a back shadow. This shows a blue background when the normal speed is displayed, a yellow background when the speed is a little faster, and a red background when the speed is faster. Is something that evokes.

In addition, like the VFD3 display pattern shown in Fig. 1, parallel strip-shaped patterns that create a perspective from the front to the back are formed, and the segments that make up each pattern are formed from the back to the front. If you drive it so that it sequentially emits light toward, you can create a dynamic shadow that emphasizes the sense of perspective that flows out.

Also, the emission pattern of VFD is not only as a back shadow,
It may be used as a color display warning light or the like together with the FLVFD for information display. In that case, it is preferable that the information display patterns of VFD and FLVFD do not overlap each other.

[Effect of device]

According to the fluorescent display device of the present invention, since a fluorescent display tube of a type other than the front emission type is provided behind the front emission type fluorescent display tube, the following effects can be obtained.

By generating a reflected image, a stereoscopic display with a sense of depth can be realized.

Since it is composed of two fluorescent display tubes, even if the sulfide-based phosphor is used for only one of the fluorescent display tubes, the adverse effect of the decomposed gas does not affect the other fluorescent display tube.

If the information is arranged vertically and overlapped, the information density is increased.

[Brief description of drawings]

1 is an exploded perspective view showing an embodiment of the present invention, FIG. 2 is a schematic sectional view showing an optical path of an image observed in the embodiment, and FIG. 3 is a structure of an FLVFD anode in the embodiment. FIG. 4 is a sectional view showing another example of the structure. 1 ... Fluorescent display device, 2 ... Front-emitting type fluorescent display tube (FLVFD), 3 ... Direct-viewing type fluorescent display tube (VFD), 4 ... FLVFD first substrate, 5 ... FLVFD wiring conductor, 6 , 6a …… FLVFD anode conductor, 8,8a …… FLVFD phosphor layer, 9 …… FLVFD anode, 10 …… FLVFD back plate, 11 …… VFD second substrate, 12 …… VFD black Insulation layer, 13 ... VFD phosphor layer, 15 ... VFD front plate.

Claims (1)

[Scope of utility model registration request] 1. A transparent first substrate, a wiring conductor composed of a transparent conductive film provided on the surface of the first substrate, an anode conductor provided on the surface of the first substrate, and an anode conductor provided on the anode conductor. A translucent anode made of a phosphor layer, a linear cathode stretched to face the anode, and a transparent rear plate having a predetermined thickness facing the first substrate, A front emission type fluorescent display tube for observing the light emission display of the phosphor layer through the first substrate, a second substrate, a wiring conductor and an anode conductor provided on the surface of the second substrate, and the anode conductor are left. An insulating layer covering the wiring conductor, a phosphor layer provided on the anode conductor, a linear cathode stretched so as to face the phosphor layer, and a back plate of the front emission type fluorescent display tube A transparent front plate facing the second substrate with a thickness, and the rear plate of the front emission type fluorescent display tube is provided with the transparent front plate. A direct-view fluorescent display tube in which a front plate is arranged close to the front plate at the same interval as the thickness of the front plate.