KR100362536B1 - Vacuum fluorescent display - Google Patents

Abstract

The present invention relates to a fluorescent display tube that can provide a thin film grid electrode instead of a metal mesh-type grid electrode and to simplify the internal structure and manufacturing process of the fluorescent display tube by thinning the anode electrode.

A first electrode and a second substrate constituting the vacuum container, a cathode electrode for emitting hot electrons when a voltage is applied, an anode electrode connected to the wiring layer to receive a voltage signal and having a fluorescent layer, and surrounding a specific anode electrode pattern And a grid electrode for controlling the direction of the hot electrons according to the applied voltage signal, wherein the anode electrode and the grid electrode are each formed as an anode electrode layer and a grid electrode layer of which one end of the wiring layer is extended in a shape of a display pattern and a shape surrounding the same. It provides a fluorescent display tube, characterized in that configured.

Description

Fluorescent display {Vacuum fluorescent display}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fluorescent display tube, and more particularly, to an anode electrode and a grid electrode in a thin film structure, which simplifies the internal structure and manufacturing process of the display tube and minimizes defects caused by contaminants. It is about.

Generally, a fluorescent fluorescence display is a self-luminous display device that emits light by colliding electrons with a phosphor of an anode electrode, and is classified into a dipole, a triode, and a quadrupole depending on its structure, and mainly emits hot electrons. Triode structures are widely used, which are composed of an electrode, an anode to which phosphor is applied to receive electrons, and a grid electrode to control the direction of hot electrons.

FIG. 7 is a cross-sectional view of a fluorescent display tube according to the prior art, wherein a cathode electrode is formed of a thin filament 1, and an anode electrode is connected to a corresponding wiring layer 7 through a conduction hole 5 formed in an insulating layer 3; It consists of a plurality of conductive layers 9 to be connected, and a fluorescent layer 11 formed on each conductive layer 9.

The grid electrode 13 is made of a metal mesh etched from a thin film of stainless or the like, and is fixed to the substrate to surround the anode electrode of a specific pattern.

Thus, when the filament 1 emits hot electrons, a positive voltage is applied to the grid electrode 13 and the conductive layer 9 on the bottom of the fluorescent layer 11 to emit light. 13 is accelerated and diffused to the anode electrode, and among them, the fluorescent layer 11 on the surface of the specific conductive layer 9 to which a positive voltage is applied is selectively emitted.

On the other hand, when a negative voltage is applied to the grid electrode 13, the grid electrode 13 blocks the hot electrons from traveling to the anode electrode.

The fluorescent display tube having such a configuration includes a wiring layer 7 and a conductive layer 9 for driving the anode electrode, and a conductive hole 5 must be formed in the insulating layer 3 for the electrical conduction thereof. Complicate the internal structure of the tube and the manufacturing process.

And by using the grid electrode 13 in the form of a metal mesh adds the process required for its manufacture and attachment in the entire manufacturing process. As a result, the manufacturing cost increases as the manufacturing process becomes complicated.

In addition, since the fixing material for fixing the grid electrode 13 to the substrate and the material constituting the conductive layer 9 of the anode electrode are combined with the residual gas in the fluorescent display tube to easily contaminate the inside of the tube, the fluorescent layer There is a problem of lowering the display quality of the fluorescent display tube by lowering the light emission characteristic of (11).

Therefore, the present invention was devised to solve the above problems, and an object of the present invention is to provide a thin film grid electrode instead of a grid electrode in the form of a metal mesh, and to manufacture a thinner anode electrode to simplify the internal structure and manufacturing process. To provide a fluorescent display tube that can be reduced.

Another object of the present invention is to reduce the display quality due to contamination by not using the conductive layer of the anode electrode which can be combined with the residual gas inside the tube to contaminate the inside of the fluorescent display tube and the fixing material for fixing the grid electrode. It is to provide a fluorescent display tube that can be prevented.

1 is a cross-sectional view of a fluorescent display tube according to the present invention.

2 is a partially enlarged view of a second substrate.

3 is a partially enlarged view of a second substrate selectively showing an anode electrode pattern;

4 is a partially enlarged view of a second substrate showing an anode electrode and a grid electrode pattern.

5 and 6 are partially enlarged views of a second substrate according to another embodiment of the present invention.

Fig. 7 is a sectional view of a fluorescent display tube according to the prior art.

In order to achieve the above object, the present invention,

A first electrode and a second substrate constituting the vacuum container, a cathode electrode for emitting hot electrons when a voltage is applied, an anode electrode connected to the wiring layer to receive a voltage signal and having a fluorescent layer, and surrounding a specific anode electrode pattern And grid electrodes for controlling the direction of hot electrons according to a voltage signal applied thereto.

The anode electrode and the grid electrode provide a fluorescent display tube, characterized in that one end of the wiring layer is formed of a thin film anode electrode layer and a grid electrode layer extended in a shape of a display pattern and a shape surrounding the wiring layer.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a cross-sectional view of a fluorescent display tube according to the present embodiment, and FIG. 2 is a partially enlarged view of a second substrate.

As shown, the fluorescent display tube, together with the side glass 2, includes a first electrode and a second substrate 4 and 6 constituting a vacuum container, a cathode electrode formed of a plurality of filaments 8, and a second substrate ( 6) an anode electrode 10 and a grid electrode 12 provided in the form of a thin film on the surface, a wiring layer 14 connecting the anode electrode 10 and the grid electrode 12 to a corresponding lead pin, and an anode electrode ( 10 and an insulating layer 16 that insulates between the grid electrode 12.

The filament 8 is coated with an oxide such as barium on an extremely thin tungsten core wire, and is supported by a filament support and an anchor (not shown) at an appropriate tension and emits hot electrons while being heated to about 600 ° C. when a voltage is applied.

In addition, the anode electrode 10 having the fluorescent layer 18 and receiving the hot electrons, and the grid electrode 12 for controlling the traveling direction of the hot electrons are connected to the wiring layer 14 on the surface of the second substrate 6 according to the present embodiment. It is provided in the form of a thin film of the same thickness as the above to simplify the internal structure and manufacturing process.

First, the anode electrode 10 will be described. The anode electrode 10 is provided in the form of a plurality of dots or segments, and in the drawings, an embodiment in the form of a seven segment is illustrated.

As shown in FIG. 3, the anode electrode 10 provided in the present embodiment includes a plurality of anode electrode layers 20 in which a plurality of wiring layers 14 are extended in individual segment forms in a display area, and each anode electrode layer 20. Comprising a fluorescent layer 18 formed on the surface, each wiring layer 14 is connected to the lead pin to provide a voltage signal to the corresponding anode electrode layer 20.

As a result, since the anode electrode layer 20 is directly provided with a voltage signal through the wiring layer 14, a uniform electric field can be formed with the anode electrode layer 20 constituting each segment. Compared with the conventional structure having the structure, the internal structure can be simplified while preventing the problem caused by poor conduction of the wiring layer and the conductive layer.

Next, the grid electrode 12 is formed to surround a specific anode electrode 10 pattern. For example, as shown in FIG. 4, the grid electrode 12 may surround one anode electrode 10 pattern formed in a seven segment form. A plurality of parts may be divided around the one to control the traveling direction of the hot electrons with respect to the one anode electrode 10 pattern.

That is, the grid electrodes 12 are positioned inside and outside each of the anode electrode layers 20 to electrically surround the plurality of grid electrode layers 22 and the plurality of grid electrode layers 22. Consisting of a conducting layer 24 to be connected, each grid electrode layer 22 is provided in the form of a thin film in which the wiring layer 14 is expanded in the same shape as the anode electrode layer 20.

Since at least one grid electrode layer 22 is connected to the corresponding lead pin through another wiring layer 14a and all grid electrode layers 22 are electrically connected by the conducting layer 24, the plurality of grid electrode layers 22 are provided. The unit shares the voltage signal supplied by the lead pins and functions as a single grid electrode.

Here, all the grid electrode layers 22 are formed outside the wiring layer 14 so as not to contact the wiring layer 14 connected to the anode electrode layer 20 to maintain insulation from the anode electrode 10 and to control the hot electrons more effectively. It is preferable that the wiring layer 14 be formed in the maximum area at the portion where the wiring layer 14 is not formed.

In this case, the conductive layer 24 shown in dotted lines in FIG. 4 may not be directly formed on the wiring layer 14 connected to the anode electrode layer 20 in consideration of the insulation from the anode electrode 10, and thus, illustrated in FIG. 2. As described above, an insulating layer 16 is provided on the surface of the second substrate 6, and the insulating layer 16 is formed by using the anode electrode layer 20 or the fluorescent layer 18 and the grid electrode layer 22 so as not to cover the display pattern. It is formed on the entire surface of the second substrate 6 except for the above.

Formation of the insulating layer 16 ensures insulation between the anode electrode 10 and the grid electrode 12 and forms a conducting layer 24 on its surface, the conducting layer 24 having at least two grids. It contacts the electrode layer 22 and electrically connects them.

In particular, in the case of the 7-segment configuration, each grid electrode layer 22 is positioned two above and below the anode electrode 10 pattern, and to the left and right portions thereof, and thus, 7 grids in one anode electrode 10 pattern. Grid electrode layers 22 may be located.

In this case, as an example, the first conducting layer 24a on the left side of the drawing contacts the four grid electrode layers 22 positioned on the upper and left portions of the anode electrode pattern, and the second conducting layer 24b on the right side of the drawing. Two grids in contact with the right side of the anode electrode pattern and the four grid electrode layers 22 located therein, and the third conducting layer 24c at the lower right of the drawing is located at the lower right side and the lower part of the anode electrode pattern. It may be in contact with the electrode layer 22.

As a result, the three conductive layers 24 electrically connect all the grid electrode layers 22 surrounding the pattern of one anode electrode 10, so that when the voltage signal is applied through the corresponding lead pins, all the grid electrode layers 22 become voltage. Will share the signal.

Thus, in the present embodiment, each anode electrode layer 20 and the grid electrode layer 22 are formed in a thin film, and the entire insulation surface of the second substrate 6 except the anode electrode layer 20 and the grid electrode layer 22 is formed. As shown in FIG. 5, in another embodiment, the insulating layer 16 may be formed on the entire surface of the second substrate 6 except for the anode electrode layer 10 or the fluorescent layer 18. .

In this case, since the insulating layer 16 covers all the grid electrode layers 22, the insulating layer 16 has a conducting hole in a specific area on each grid electrode layer 22 for conduction between the grid electrode layers 22. 16a) is formed to partially expose the grid electrode layer 22.

Therefore, as shown in FIG. 6, a plurality of conductive layers 24 formed on the insulating layer 16 are electrically connected to each other by contacting at least two or more grid electrode layers 22 through the conductive holes 16a. As shown in the figure, the structure of connecting the seven grid electrode layers 22 with three conductive layers 24 is the same as in the previous embodiment.

Here, the insulating layer 16 is formed to a minimum thickness necessary for the insulation so that the grid electrode layer 22 forms a sufficient electric field to control the hot electrons, and preferably the grid electrode layer 22 is formed of the filament 8 as in the previous embodiment. It is more effective to directly control the hot electrons without being exposed through the insulating layer 16 so as to face.

As described above, the fluorescent display tube provided in this embodiment constitutes the anode electrode 10 by the anode electrode layer 20 having the thin film form in which the wiring layer 14 is extended and the fluorescent layer 18 formed on the surface thereof, and also has the thin film form. The grid electrode 12 is composed of the grid electrode layer 22 and the conductive layer 24 electrically connecting them, thereby effectively simplifying the internal structure and manufacturing process of the display tube.

Although the preferred embodiments of the present invention have been described above, the present invention is not limited thereto, and various modifications and changes can be made within the scope of the claims and the detailed description of the invention and the accompanying drawings. Naturally, it belongs to the range of.

As described above, the fluorescent display tube according to the present invention provides a thin film anode electrode layer with an extended wiring layer instead of providing a conductive layer on the anode electrode, and also provides a grid electrode layer in the form of a thin film instead of the grid electrode in the metal mesh form. By simplifying the internal structure and manufacturing process, manufacturing costs can be effectively reduced.

In addition, since the anode electrode does not have a conductive layer and does not use a fixing material for fixing the grid electrode in the form of a metal mesh, contamination by residual gas in the display tube is minimized to prevent display quality degradation due to contamination. It has the advantage to do it.

Claims (9)

A first electrode and a second substrate constituting the vacuum container, a cathode electrode for emitting hot electrons when a voltage is applied, an anode electrode connected to the wiring layer to receive a voltage signal and having a fluorescent layer, and surrounding a specific anode electrode pattern And grid electrodes for controlling the direction of hot electrons according to a voltage signal applied thereto. Wherein the anode electrode and the grid electrode are formed of an anode electrode layer and a grid electrode layer of a thin film having one end of the wiring layer extended in a shape of a display pattern and a shape surrounding the display layer. The method of claim 1, And the anode electrode comprises an anode electrode layer of a thin film in which one end of each wiring layer is extended into individual segment shapes, and a fluorescent layer formed on the surface of each anode electrode. The method of claim 1, And a grid electrode layer formed around the anode electrode layer in which the grid electrode extends in the shape of a display pattern, and a conducting layer electrically connecting the plurality of grid electrode layers. The method of claim 3, wherein And an outer surface of the wiring layer such that the grid electrode layer does not contact the wiring layer connected to the anode electrode layer. The method of claim 1, And an insulating layer formed on the entire surface of the substrate except for the fluorescent layer and the grid electrode layer. The method according to claim 3 or 5, And a conductive layer formed on the insulating layer and in contact with the grid electrode layers disposed adjacent to each other at one end thereof. The method of claim 1, And an insulating layer formed on the entire surface of the substrate except for the fluorescent layer. The method of claim 7, wherein And an insulating layer forming a conduction hole on each grid electrode layer. The method according to claim 3 or 7, And a conductive layer formed on the insulating layer and contacting the grid electrode layers disposed adjacent to each other at one end through the conductive holes.