JPS6273537A - Fluorescent character display tube - Google Patents

Abstract

PURPOSE:To make it possible to arrange grids unrestrictedly, by preparing grid compositions connected each other with very small bridges, and furnishing adhesive pieces to be heat-adhered to the grid compositions. CONSTITUTION:After piling a pad 14 connected to a wire 13 and a heat-adhesive piece 15, laser beams are applied on them to fix the grid composition to a vacuum envelope 11, and an electric potential can be given to the grid 12 from spacer leads 17 through pads 18 and the wire 13 with the pad 14. After that, bridges 16 connecting the grids are burned out by the laser beams to insulate between the grids. In this case, if the grids and the other parts are blackened responding to the wave length of the laser, the heat absorption is improved to improve the process efficiency. In this case, the bridges are treated in consideration totally to prevent the deformation of the grids before the heat-adhesion. In such a composition, grid-to-grid distance can be realized to be about 1.5mm longitudinally and laterally.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a fluorescent display tube, and more particularly to a grid structure suitable for free arrangement.

[Conventional technology]

Conventionally, the grid of this type of fluorescent display tube is as shown in Fig. 2(a).
As shown in the figure, a spacer 3 drawn out of the vacuum envelope is sandwiched between the vacuum envelopes 1 and 2, and a mesh-like grid 4 is welded onto this spacer, or
Alternatively, as shown in FIG. 2(b), there is a structure in which a piece of mesh grid is held down by a low melting point glass 21 within a vacuum envelope.

[Problem that the invention seeks to solve]

The nine conventional grid structures mentioned above are the second Jul (a)
In a structure like G2., it is impossible to extract G to the outside in response to the grid arrangement requirement as shown in FIG. 3, for example, because it is sandwiched and supported by a vacuum envelope. It was necessary to widen the metal between G3 or G4°05 and pull out the spacer S to reach the sandwich part.

In such a case, between G2° and G3, or between G4. During G5, the required display was not possible, and there were design constraints. In addition, in the structure shown in Fig. 2(b), since a part of the grid is usually fixed and supported by gold low-melting glass, the molten part of the low-melting glass becomes large as shown in Fig. 2, and the third Even for a grid arrangement as shown in the figure, a larger spacing between the grids is required than that shown in Figure 2(a).

[Means to solve all problems]

The grid structure of the fluorescent display tube of the present invention has a grid structure in which the grids are connected to each other by very thin bridges and have adhesive pieces to be thermally bonded. [Example] Next, regarding the present invention, Part 1, which will be described with reference to all the drawings, is a perspective view of an embodiment of the present invention.

10.11 is a vacuum envelope. 12 is a grid, 13 is a wiring for giving first place to the grid, 14 is a pad connected to the wiring in 13, 15 is a thermally bonded piece of the grid, 16 is a thin bridge, o17 is a sandwiched spacer lead, 18 is a pad, in this configuration, 15 and 14
The digrid structure is fixed to the vacuum envelope 11 by overlapping them and irradiating with a laser beam, and the structures 17 to 18 are
A potential can be applied to the grid 12 through 13 and 14.

After that, the bridges 16 that connect the grids are burned out with a laser beam to insulate the gold between the grids.In this case, if the grids are blackened to match the wavelength of the laser light, heat absorption will be improved and work efficiency will be improved. climb. In this case, the bridge is used to prevent deformation of the grid before thermal bonding,
In the case of 0 or more configurations that are intended to be handled as one,
The distance between the grids can be realized at 1.5111 in the front, back, left and right. [Effects of the Invention] As explained above, the present invention allows grids to be arranged completely freely in a fairly free design, and the laser This has the effect of making it possible to thermally bond small areas, and cutting bridges between grids can also be done with precision.In addition, in the case of Fig. 2 (b), a separate seal is placed outside the vacuum envelope. It is necessary to attach a lead bin, which is weak in terms of strength, but when using this method, sandwich-type spacer leads can be used as shown in Figure 1, so the strength is also strong!
do.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a fluorescent display tube having a grid structure according to the present invention, FIG. 2 (aMb) is a perspective view of the structure of a conventional fluorescent display tube, and FIG. 3 is a conceptual diagram showing the grid spacing wt. Agent: Patent Attorney Susumu Uchihara S@, Ison Otsu” Figure 3

Claims (1)

[Claims] A fluorescent display tube having at least an anode for displaying pictures, symbols, etc. and a control grid in a vacuum envelope, in which the control grid before assembly is connected with a thin bridge and has a thermal adhesive piece. A fluorescent display tube characterized by: