JPH088514Y2 - Fluorescent display tube - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention relates to a fluorescent display tube, and more particularly to a fluorescent display tube in which a display pattern and an external lead are connected through a graphite electrode.

[Conventional technology]

As shown in FIG. 4, the connection between the display pattern 7 of the conventional fluorescent display tube and the lead 12 for external drawing is performed by the display pattern 7
Graphite electrode 11 formed on the tip of the wire connected to
Was done through.

The graphite electrode 11 is used to prevent reflection and improve the display quality of the display pattern 7 as shown in FIG.
As shown in (b), graphite was uniformly applied over the entire surface including the contact portion with the tip of the external lead 12 and the tip of the external lead 12 was in contact with the surface of the graphite electrode.

[Problems to be solved by the device]

In the conventional fluorescent display tube described above, since the graphite electrode 11 formed at the tip of the wiring of the display pattern 7 and the tip of the lead 12 for drawing out the external lead are in mechanical contact, the surface of the graphite electrode 11 is drawn out to the outside. There is a drawback in that it is scraped off at the tip of the working lead 12 and falls off, or peels off due to an external impact such as tapping and scatters inside the tube, remains as dust on the display pattern 7 and deteriorates the display quality.

In addition, when the scraps of the graphite electrode 11 fall between the grid 3 and the display pattern 7, the grid 3 and the display pattern 7 are short-circuited, resulting in a defect.

In order to solve these drawbacks, recently, there is an example in which the graphite electrode 11 is entirely removed and improved, but as described above, there is a drawback that defects such as reflection and halation occur.

It is an object of the present invention to provide a fluorescent display tube that prevents graphite waste from falling, is free from defects due to short-circuiting between electrodes, and has a high display quality.

[Means for solving the problem]

The present invention includes an anode substrate that constitutes one main surface of a vacuum container,
A display pattern formed on the anode substrate, a wire connected to the display pattern, a graphite electrode formed on the tip of the wire, and the tip contacting the surface of the graphite electrode and led out of the vacuum container. In the fluorescent display tube having the lead for external extraction, the graphite electrode is formed while leaving the contact portion between the wiring and the lead for external extraction, and the lead for external extraction is directly contacted with the wiring.

〔Example〕

Next, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a plan view of an anode substrate according to an embodiment of the present invention, and FIG.
1A and 1B are a partially enlarged plan view and a partially enlarged cross-sectional view of a portion A in FIG.

As shown in FIGS. 1 and 2A and 2B, the wiring 13 connected to the display pattern 7 formed on the anode substrate 1
A graphite electrode 11 from which graphite at the contact portion with the external lead 12 is removed is formed on the top.

In this way, the graphite in the contact area is removed and the wiring 13
As shown in FIG. 5 (b), the graphite electrode is directly connected to the tip of the lead 12 for external extraction.
It is possible to prevent the graphite 11 from rising to the tip of the lead 12 for external extraction and falling off or the graphite peeling off due to tapping or the like.

FIG. 3 is a plan view of an example of an electrode component having an external lead for use in the fluorescent display tube of the present invention.

As shown in FIG. 3, the electrode component 14 has leads 12 for external extraction formed so that the tips correspond to the respective positions of the plurality of graphite electrodes 11 shown in FIG.

The external lead 12 is fixed by frit glass or the like between the anode substrate 1 and the cover glass 6 shown in FIG. Is obtained.

[Effect of device]

As described above, the graphite electrode formed on the wiring connected to the display pattern is formed by leaving the connecting portion between the wiring and the external extraction lead, and the external extraction lead is brought into direct contact with the wiring. The graphite is not broken down or peeled off by an external impact such as tapping, so that the display quality is improved and the short circuit between the electrodes can be eliminated.

[Brief description of drawings]

FIG. 1 is a plan view of an anode substrate of one embodiment of the present invention, FIGS. 2 (a) and 2 (b) are partially enlarged plan views and partially enlarged sectional views of FIG. 1A, and FIG. 3 is the present invention. FIG. 4 is a plan view of an example of an electrode component having an external lead for use in the fluorescent display tube of FIG. 4, FIG. 4 is a partially cutaway perspective view of an example of a conventional fluorescent display tube, and FIGS. FIG. 4A is a partially enlarged plan view and a partially enlarged cross-sectional view of an example of a joint portion between the graphite electrode and the external lead of FIG. 1 ... Anode substrate, 2 ... Spacer, 3 ... Grid, 4
...... Filament, 5 ...... Getter, 6 ...... Cover glass, 7 ...... Display pattern, 8 ...... Nesa terminal, 9 ...... Exhaust pipe, 10, 11 ...... Graphite electrode, 12 ...... Lead for external drawing, 13 ...... Wiring, 14 ...... Electrode parts.

Claims (1)

[Scope of utility model registration request] 1. An anode substrate constituting one main surface of a vacuum container,
A display pattern formed on the anode substrate, a wire connected to the display pattern, a graphite electrode formed on the tip of the wire, and the tip contacting the surface of the graphite electrode and led out of the vacuum container. In the fluorescent display tube having an external extraction lead, the graphite electrode is formed leaving a contact portion between the wiring and the external extraction lead, and the external extraction lead is directly contacted with the wiring. Characteristic fluorescent display tube.