JPH04324232A - Fluorescent character display tube - Google Patents

Abstract

PURPOSE:To enable efficient heat discharge and stabilize operation by providing a plurality of grooves at the outside of an anode substrate forming a fluorescent character display tube, and providing projections on a heat discharge board to fit in the grooves respectively so as to install the heat discharge board in the anode substrate. CONSTITUTION:A saw-toothed grooves are formed on the outer surface of an anode substrate 1a, and projections to fit in the grooves are formed on a heat discharge board 2a, whereby the board 2 is installed in the substrate 1a and bonded to each other. Heat conduction between the two 1a, 2a is increased to efficiently discharge heat from the substrate 1a and stabilize operation.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fluorescent display tube, and more particularly to a fluorescent display tube having a heat sink on the outer surface of an anode substrate.

0002

[Prior Art] A conventional fluorescent display tube, as shown in FIG.
It had a structure in which respective planes were bonded together by bonding a plane heat sink to a plane anode substrate 1C.

0003

[Problems to be Solved by the Invention] Since the anode substrate and heat sink of a conventional fluorescent display tube are bonded to each other on their respective planes, the contact area is small and when the amount of heat generated on the anode substrate is large, However, there was a problem in that heat from the anode substrate could not be completely dissipated because heat conduction from the anode substrate to the heat sink was not sufficient.

SUMMARY OF THE INVENTION An object of the present invention is to provide a fluorescent display tube with sufficient heat conduction from the anode substrate to the heat sink and stable operation.

[0005]

[Means for Solving the Problems] The present invention provides a fluorescent display tube having a heat sink on the outer surface of an anode substrate, in which a plurality of grooves are provided on the outer surface of the anode substrate, and a convex portion is provided on the heat sink to fit into the grooves. and the heat sink is fixed to the anode substrate by fitting the convex portion into the groove.

[0006]

Embodiments Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a perspective view of a main part of a first embodiment of the present invention.

In the first embodiment, as shown in FIG. 1, a sawtooth groove is formed on the outer surface of the anode substrate 1a, and a convex portion is provided to fit into the position of the heat sink 2a corresponding to the groove. The convex portion is fitted into the groove of the anode substrate 1a and bonded.

FIG. 2 is a perspective view of a main part of a second embodiment of the present invention.

In the second embodiment, as shown in FIG. 2, a flat-bottomed groove is provided on the outer surface of the anode substrate 2a, and a convex portion that fits into the heat sink 2b is provided at a position corresponding to the flat-bottomed groove. The convex portion is fitted into the groove of the anode substrate 1b and bonded.

The second embodiment has a larger bonding area than the first embodiment, so the heat dissipation effect is greater.

It goes without saying that the grooves and convex portions of the anode substrate and the heat sink can have various shapes.

The heat dissipation effects of the first and second embodiments were improved by 10% and 30%, respectively, compared to the conventional structure.

[0014]

[Effects of the Invention] As explained above, the present invention provides a groove in the anode substrate, a convex portion in the heat sink that fits into the groove in the anode substrate, and a groove in the anode substrate and a convex portion in the heat sink to fit together. Since the anode substrate and the heat sink are bonded together, the contact area between the anode substrate and the heat sink increases, heat conduction from the anode substrate to the heat sink increases, heat is dissipated from the anode substrate efficiently, and stable operation is achieved. It has the effect of being

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a main part of a first embodiment of the present invention.

FIG. 2 is a perspective view of a main part explaining a second embodiment of the present invention.

FIG. 3 is a sectional view of a main part of an example of a conventional fluorescent display tube.

[Explanation of symbols]

1a, 1b, 1c Anode substrate 2a, 2b, 2c Heat sink

Claims (1)

[Claims] 1. A fluorescent display tube having a heat sink on the outer surface of the anode substrate, wherein the outer surface of the anode substrate is provided with a plurality of grooves, the heat sink is provided with a convex portion that fits into the groove, and the groove has the convex portion. A fluorescent display tube, characterized in that the heat sink is fixed to the anode substrate by fitting the heat sink to the anode substrate.