KR100346551B1 - Vacuum fluorescent display device - Google Patents

Abstract

The present invention relates to a fluorescent display tube that can reduce power consumption and improve wiring freedom and lifespan by implementing fixed characters by using an insulating layer having a multi-layered insulating layer having different colors. The fluorescent display tube includes a pair of substrates which together with the side glass constitute a vacuum container; A filament mounted inside the vacuum container and emitting hot electrons when the power is applied; A light emitting display pattern portion including an anode electrode to which external power is applied from a wiring layer provided on any one of the substrates, and a fluorescent layer provided on a surface of the electrode and excited by the hot electrons; An insulating layer formed of a multilayer structure including a lower layer provided on a surface of the substrate provided with the wiring layer and an upper layer provided on an upper side of the lower layer, and preventing unnecessary current flow between the wirings; And a control electrode for accelerating or blocking hot electrons emitted from the filament toward the fluorescent layer, wherein the lower layer and the upper layer of the insulating layer are configured to form a non-emission display pattern portion displaying a specific letter or number according to color difference. It is made of different colors.

Description

Fluorescent Display Tube {VACUUM FLUORESCENT DISPLAY DEVICE}

The present invention relates to a fluorescent display tube having a fixed character that continuously emits light, and more particularly, by using a multi-layered insulating layer having different colors to implement a fixed character, power consumption according to light emission of the fixed character is realized. The present invention relates to a fluorescent display tube that can reduce and improve wiring freedom and lifetime.

In general, a fluorescent display tube (VFD) has excellent visibility, a wide viewing angle, and can be driven at a low voltage, making it easy to apply a semiconductor component and having high reliability. A front substrate, a back substrate and a side glass forming a container, a wiring layer electrically connecting the inside of the fluorescent display tube, an insulating layer to prevent unnecessary electric conduction between the wirings, an anode electrode to which an external voltage is applied through the wiring layer, and A display pattern portion including a fluorescent layer provided on the surface of the electrode, a filament for emitting hot electrons, and a metal mesh type control electrode for rapidly diffusing or blocking hot electrons emitted from the filament toward the fluorescent layer; .

Accordingly, when voltage is applied to the filament, the anode electrode and the mesh grid through the lead wires, hot electrons are emitted from the filament, and the emitted electrons are accelerated and diffused by the control electrode to collide with the fluorescent layer of the display pattern part so that the fluorescent layer emits light. By this, a predetermined symbol or character is represented.

In the fluorescent display tube having such a configuration, the display pattern portion includes a fixed character that continuously emits light throughout the driving time of the fluorescent display tube so as to display a manufacturer's name. The anode and the fluorescent layer were formed in the same manner as in the other general light emitting display pattern portions driven.

By the way, according to the conventional fluorescent display tube constituting the fixed character using the anode electrode and the fluorescent layer as described above, wiring for applying an external power source to the fluorescent layer of the fixed character is required, Since the power must be continuously applied, power consumption is increased, wiring freedom is limited, and lifespan is reduced due to continuous light emission of fixed characters.

Accordingly, an object of the present invention is to provide a fluorescent display tube that can reduce power consumption and improve wiring freedom and life by forming a fixed character with a non-emission display pattern portion.

1 is a cross-sectional view of a fluorescent display tube according to an embodiment of the present invention.

2 is a cross-sectional view of a fluorescent display tube according to another embodiment of the present invention.

An object of the present invention as described above is to form an insulating layer that prevents unnecessary electrical conduction between wirings in a multi-layered structure in which each layer has a different color, and to provide a predetermined display pattern by using color differences between upper and lower insulating layers. This is achieved by the fluorescent display tube constituting the non-emitting display pattern portion.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a cross-sectional view of a fluorescent display tube according to an embodiment of the present invention.

As shown, the interior of the container is electrically connected to the inside of the vacuum container, for example, the lower plate 14, formed by a pair of substrates 12 and 14 facing each other and the side glass 16 connecting the substrates. A wiring layer 18 is provided, and an anode electrode 20a is electrically connected to the wiring layer, and on the surface of the electrode 20a is a fluorescent layer 20b which is excited by the hot electrons emitted from the filament 22 and emits light. ) Is provided.

Here, the anode electrode 20a and the fluorescent layer 20b constitute the light emitting display pattern portion 20.

In addition, a control electrode 24 for accelerating diffusion or blocking the hot electrons is provided between the filament 22 and the light emitting display pattern portion 20, and the surface of the wiring layer 18 is provided to prevent unnecessary electric conduction between conductive materials. An insulating layer 26 is provided.

In this embodiment, the insulating layer 26 is made of a multi-layered structure of the lower layer 26a and the upper layer 26b having different colors, and the upper layer 26b is embossed to form a fixed letter such as a manufacturing company name. Is patterned.

Here, the lower layer 26a and the upper layer 26b of the portion shown by the dotted dotted line constitute the non-emission display pattern portion 28, and at least one of the layers 26a and 26b has a luminous material or When the fluorescent material pigment is included, the visibility of the fixed characters constituting the non-emission display pattern portion may be improved, and the lower layer 26a may be formed with a color having excellent contrast effect with the colors of the upper layer 26b and the fluorescent layer 20b. It is preferable.

The upper layer 26b may be formed at either the inside or the outside of the control electrode.

2 is a cross-sectional view according to another embodiment of the present invention. Since the basic configuration is the same as that of the embodiment of FIG. 1, only the parts different from the above embodiment will be described below.

In this embodiment, the insulating layer 26 provided on the surface of the wiring layer 18 to prevent unnecessary electric conduction between the conductive materials is similar to the embodiment of FIG. 26b).

However, the upper layer 26b of the present embodiment is intaglio patterned differently from the embodiment of FIG. 1, thereby forming the non-emission display pattern portion 28 ′ by the fixed characters.

In addition, at least one insulating layer of the lower layer 26a and the upper layer 26b includes a luminous material or a fluorescent material pigment, and the upper layer 26b has a color and contrast effect of the lower layer 26a and the fluorescent layer 20b. Forms in excellent colors.

Accordingly, when the fluorescent display tube is driven, an anode voltage applied from the wiring layer 18 to the anode electrode 20a is applied to the fluorescent layer 20b constituting the light emitting display pattern portion 20, and the fluorescent light to which the voltage is applied is applied. The layer 20b is excited by the hot electrons emitted from the filament 22 to emit light.

In addition, the fixed characters are continuously displayed in the non-light emitting pattern portions 28 and 28 ′ due to the color difference between the lower layer 26a and the upper layer 26b regardless of whether the tube is driven or not.

Although the preferred embodiments of the present invention have been described above, the present invention is not limited thereto, and various modifications and changes can be made within the scope of the claims and the detailed description of the invention and the accompanying drawings. Naturally, it belongs to the range of.

As described above, according to the fluorescent display tube of the present invention, since the fixed character is composed of the non-emission display pattern portion by the insulating layer, the need for applying an external voltage to the pattern portion is eliminated.

Therefore, the wiring structure can be simplified, the wiring freedom can be improved, the power consumption can be reduced, and the life deterioration due to continuous light emission can be prevented.

Claims (5)

A pair of substrates which together with the side glass constitute a vacuum container; A filament mounted inside the vacuum container and emitting hot electrons when the power is applied; A light emitting display pattern portion including an anode electrode to which external power is applied from a wiring layer provided on any one of the substrates, and a fluorescent layer provided on a surface of the electrode and excited by the hot electrons; An insulating layer formed of a multilayer structure including a lower layer provided on a surface of the substrate provided with the wiring layer and an upper layer provided on an upper side of the lower layer, and preventing unnecessary current flow between the wirings; A control electrode for accelerating or blocking hot electrons emitted from the filament toward the fluorescent layer; Including; And a lower layer and an upper layer of the insulating layer having different colors so as to form a non-emission display pattern portion displaying a specific letter or number according to color difference. The fluorescent display tube of claim 1, wherein the upper layer is provided in an embossed pattern. The fluorescent display tube of claim 1, wherein the upper layer is provided in an intaglio pattern. The fluorescent display tube of claim 1, wherein at least one insulating layer of the upper layer and the lower layer is made of a fluorescent material. The fluorescent display tube of claim 1, wherein at least one insulating layer of the upper layer and the lower layer is made of a luminous material.