JP2527544Y2 - Fluorescent display tube - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a fluorescent display tube, and more particularly, to an anode electrode structure of a flat emission type fluorescent display tube.

[Conventional technology]

2. Description of the Related Art Conventionally, in a flat emission fluorescent display tube, as shown in FIG.
An external electrode 2 and an internal electrode 3 were formed, and a thin wire electrode 4 connecting them was formed. The phosphor 1 was provided thereon. Since the thin line electrode 4 is provided in the display pattern 1 by a metal electrode such as aluminum, when the display area is small, the ratio of the transmitted light blocked by the thin line electrode is large, and the luminous brightness is reduced. become. In particular, as shown in FIG. 2, when the distance between the concentric inner electrode 3 and the outer electrode 2 is smaller than the diameter of the inner electrode 3, the amount of light shielding by the thin wire electrode 4 increases. Therefore, as shown in FIG. 3, there is also a configuration in which the thin line electrodes of the display section are deleted.

[Problems to be solved by the invention]

When the display area is small as described above, in the conventional fluorescent display tube, since the thin wire electrode 4 is omitted, the internal electrode 3 is not used.
And the external electrode 2 is electrically connected only by the phosphor 1. Since the resistance of this phosphor is higher than that of the metal electrode, the potential drop due to the internal resistance of the phosphor 1 is large,
As the distance from 3 increases, the effective potential decreases, resulting in a difference in luminance and a decrease in display quality.

The purpose of the present invention is to eliminate such drawbacks, eliminate the difference in luminance of the display pattern, and suppress the decrease in luminous luminance.
An object of the present invention is to provide a fluorescent display tube with improved display quality.

[Means for solving the problem]

The configuration of the present invention provides a ring-shaped gap region between an internal electrode formed on a light-transmitting insulating substrate and an external electrode arranged so as to surround the ring-shaped display pattern by light emission of the phosphor layer. The phosphor layer covering the gap region with the phosphor layer as defined by, and the gap dimension for defining the width of the ring-shaped display pattern has an anode configuration smaller than the diameter of the internal electrode; In a flat emission type fluorescent display tube in which a layer is made to emit light and display is performed by light transmitted from the insulating substrate, one thin linear thin-film metal connecting between the external electrode and the internal electrode is provided in the gap region. It is characterized by being arranged.

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

1 (a), 1 (b) and 1 (c) are a display pattern diagram, a front view and a sectional view of an anode electrode according to an embodiment of the present invention. In order to form the display pattern 11 shown in FIG. 1 (a), the electrode on the anode is formed on the transparent insulating substrate 10 as shown in FIGS. 1 (b) and 1 (c). And internal electrode 3
The external electrode 2 and the internal electrode 3 are electrically connected by a single thin wire electrode 4. The line width of the thin wire electrode 4 is set to be more than 10 μm.

[Effect of the invention]

As described above, in the present invention, one thin line electrode is provided in the display unit.
By arranging at two places, it is possible to prevent a large decrease in potential due to the resistance of the phosphor, to make the distribution of luminance more uniform, and to prevent a decrease in display quality. In addition, since the width of the fine line electrode is more than 10 μm, there is no problem such as division of display on the visual sense, and by arranging one fine line electrode, the luminance can be prevented from lowering.

[Brief description of the drawings]

1 (a), 1 (b) and 1 (c) show a display pattern diagram, a front view and a sectional view of an embodiment of the present invention, and FIGS. 2 and 3 show two examples of a conventional anode electrode portion. It is a front view. 1 ... phosphor, 2 ... external electrode, 3 ... internal electrode, 4 ...
... Fine wire electrode, 10 ... Transparent insulating substrate, 11,12 ... Display pattern.

Claims (1)

(57) [Scope of request for utility model registration] A ring-shaped display pattern formed by light emission from a phosphor layer is formed by a ring-shaped gap region between an internal electrode formed on a light-transmitting insulating substrate and an external electrode disposed so as to surround the internal electrode; The phosphor layer covers the gap region with the phosphor layer as defined, and has an anode configuration in which the gap dimension defining the width of the ring-shaped display pattern is smaller than the diameter of the internal electrode. In a flat emission type fluorescent display tube which emits light and performs display by transmitting light from the insulating substrate, one thin linear thin-film metal connecting between the external electrode and the internal electrode is disposed in the gap region. A fluorescent display tube characterized by being provided.