JPH0511300U - Fluorescent display tube - Google Patents

Abstract

(57) [Abstract] [Purpose] In a fluorescent display tube, problems such as display flicker and noise due to resonance vibration of a member structure such as a filament 1 and a filament support 2 are improved. [Structure] A buffer material made of low-melting glass 6 is provided between an anode substrate 4 and a filament support 2.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 The present invention relates to a fluorescent display tube, and more particularly to a fluorescent display tube having a filament support.

[0002]

[Prior Art]

 Conventionally, as shown in FIGS. 3 (a) to 3 (c), a fluorescent display tube of this type has a filament 1 paired with an external lead 8 on an anode substrate 4 on which a low melting point glass 6 is printed. There was provided a structure in which the filament support 2 holding the above and the vacuum airtight container 5 were placed and fused at a high temperature.

[0003]

[Problems to be solved by the device]

 In the above-described conventional fluorescent display tube, there is a gap of about 0.1 mm between the filament support 2 and the anode substrate 4 except for the fused portion, and the filament support 2 can be sufficiently fixed. Therefore, when the filament 1 is energized at a certain frequency, the filament support 2 resonates to generate an oscillating sound, and when an external shock is applied to the fluorescent display tube, the filament support 2 vibrates. However, the resonance of the filament 1 causes bright and dark display, resulting in poor display quality.

An object of the present invention is to provide a fluorescent display tube having a high display quality without generating an oscillating sound or a bright and dark display.

[0005]

[Means for Solving the Problems]

 According to the present invention, an anode substrate, a phosphor layer formed on the anode substrate, a filament stretched over the phosphor layer at an interval, and placed on the anode substrate to hold the filament. In a fluorescent display tube having a pair of filament supports, and a grid arranged in the middle of the phosphor layer and the filament, a buffer material is provided between the filament support and the anode substrate. Is characterized by.

[0006]

【Example】

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

1A to 1C are configuration diagrams of a first embodiment of the present invention. FIG. 1A is a plan view, FIG. 1B is a sectional view taken along the line AA ', and FIG. FIG. 6 is a sectional view taken along the line B ′.

In the first embodiment, as shown in FIGS. 1 (a) to 1 (c), the low melting point glass 6 to be printed when the vacuum airtight container 5 is fused on the anode substrate 4 is replaced with the anode substrate 4 The upper part and the lower part of the filament support 2 are also printed at the same time as the fused part, and the electrode with the external lead 8 and the filament support 2 and the vacuum airtight container 5 are placed on the upper part and the high temperature. It is a fluorescent display tube using a method of fusion-bonding the filament support 2 and fixing the filament support 2.

In the second embodiment, as shown in FIGS. 2A to 2C, a microphone (mica) 7 having a plate thickness of about 0.1 mm is used as the anode substrate 4 and the filament support 2 It is placed under the filament support 2 and sandwiched between the filament supports 2 and fixed.

[0010]

[Effect of the device]

 As described above, in the present invention, in the fluorescent display tube, by providing the buffer material containing low melting point glass and mica between the filament support and the cathode substrate, the gap between the filament support and the anode substrate is reduced. The area of the fixed portion of the filament support is increased, and problems such as vibration and oscillating sound due to frequency resonance of the filament support are suppressed, and the display quality is improved.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a first embodiment of the present invention.

FIG. 2 is a configuration diagram of a second embodiment of the present invention.

FIG. 3 is a configuration diagram of an example of a conventional fluorescent display tube.

[Explanation of symbols]

 1 Filament 2 Filament support 3 Spacer glass 4 Anode substrate 5 Vacuum airtight container 6 Low melting point glass 7 Mica 8 External lead

Claims (1)

Claims for utility model registration: 1. An anode substrate, a phosphor layer formed on the anode substrate, a filament stretched over the phosphor layer at an interval, and on the anode substrate. In a fluorescent display tube having a pair of filament supports placed on the substrate and holding the filament, and a grid disposed in the middle of the phosphor layer and the filament, between the filament support and the anode substrate. A fluorescent display tube having a cushioning material.