Electric lamp or space discharge component or device manufacturi – Process – With assembly or disassembly
Patent
1990-12-28
1992-03-10
Ramsey, Kenneth J.
Electric lamp or space discharge component or device manufacturi
Process
With assembly or disassembly
445 24, H01J 918
Patent
active
050946420
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a method of manufacturing a control subassembly for a flat display device, said control subassembly consisting of a first control plate and a second control plate, as set forth in the preamble of claim 1.
Such a method is disclosed in European Patent 0,050,294. In that method, a first glass frit is applied to a first control plate and then heated until it crystallizes. Next, a second glass frit is applied to the crystallized glass frit, and the second control plate is placed on it. Further heating causes the second glass frit to crystallize, whereby the two control plates are bonded together in a predetermined spaced relationship from each other. This method requires two different glass frits with different crystallization points. Another disadvantage is that two heating processes to about 450.degree. C. and 350.degree. C., respectively, are necessary.
It is the object of the present invention to provide a simple method for manufacturing control subassemblies of the kind as mentioned.
The method according to the present invention for manufacturing a control subassembly comprising a first control plate and a second control plate, whereby these control plates each comprise a layer of parallel conductors isolated from one another, comprises the following procedure of steps: in continuous stripes perpendicular to its conductors, whereby a heating step follows to each applying step, said heating being sufficient only for solidification, but not for crystallization of the glass-frit, perpendicular, methylmethacrlate, and a solvent of Buthyldiglykol-acetate and Cyclohexanon.
This method differs from that one according to EP-A-0 050 294 in three viewpoints, i.e.: conductors, but each glass-frit stripe is continuously supplied rectangularly over all conductors and the spaces therebetween, which method simplifies very much the application of the glass-frit stripes; application of a layer of glass-frit stripes, but only till solidification of the glass-frit. Heating until crystallization is only provided after arranging the second control plate and aligning the control plates against each other. This procedure has a shortened sequence of the method steps as a consequence, with application of reduced energy; and above-mentioned two procedural steps.
In a preferred embodiment, the holding members are provided with lign-shaped portions of reduced cross-sectional area in connection to the conductors. Due to these holding members, handling of the control plate before assembling to the control subassembly is easy. After assembling these holding members may be easily removed by bending over.
In the following, the application is explained by embodiments illustrated by drawings, in which:
FIG. 1 is a top view of a part of the first control plate with holding edges prior to the application of the glass frit;
FIG. 2 is a top view of the first control plate with a simplified holding edge prior to the application of the glass frit;
FIG. 3 is a section taken along line III--III of FIG. 2;
FIG. 4 is a top view of a part of the second control plate;
FIG. 5 is a top view of the first control plate of FIG. 2 after application of the glass frit;
FIG. 6 is a section taken along line VI--VI of FIG. 5, and
FIG. 7 is a top view of a part of the finished control subassembly.
The control subassembly fabricated by the novel method, after being united with a perforated extract anode, can be used as a control system in the flat evacuated display device disclosed in the not prepublished EP-A-0311938. This display device has a phosphor-dot glass faceplate and a back metal envelope. In the latter, an area cathode consisting of a periodic array of filaments is disposed in front of a segmented counterelectrode, and the control system, consisting of the perforated extract anode, which is attached to a frame, and the control subassembly bonded thereto, is disposed in front of the area cathode.
The first control plate 1, shown in FIG. 1 in a top view, consists of a plurality of coplanar, parallel conductors 2 which are
REFERENCES:
patent: 4521251 (1985-04-01), Otake et al.
patent: 4651049 (1987-03-01), Saeki et al.
patent: 5011391 (1991-04-01), Kawasaki et al.
Reichelt Michael
Tischer Kurt-Manfred
Nokia Unterhaltungselektronik
Ramsey Kenneth J.
Van Der Sluys Peter C.
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