Image display device

Abstract

A back substrate includes a getter room which is communicated with a vacuum envelope, and a getter assembly is arranged in the inside of the getter room. The getter assembly is provided with a getter support which holds and heats a non-volatile getter and a pair of electrodes which is respectively connected to both end portions of the getter support. Another-end sides of the pair of electrodes pass through a room member and are pulled out to the outside. The present invention provides an image display device which can facilitate the activation of a getter by fixedly mounting a non-volatile getter and, at the same time, can obtain the high degree of vacuum by the effective activation.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic plan view showing the constitution of an embodiment 1 of an image display device according to the present invention;

FIG. 2 is an enlarged cross-sectional view of an essential part showing the constitution of the image display device of FIG. 1;

FIG. 3 is a plan view showing the constitution of a getter device shown in FIG. 2 as viewed from the direction indicated by an arrow A;

FIG. 4A and FIG. 4B are plan views explaining the structure of getter supports shown in FIG. 2 and FIG. 3;

FIG. 5 is an enlarged cross-sectional view of an essential part showing the schematic constitution of an electron-emission-type image display device of an embodiment 2 of the image display device according to the present invention;

FIG. 6 is a plan view showing the constitution of a getter device shown in FIG. 5 as viewed from the direction indicated by an arrow A;

FIG. 7 is a plan view of an essential part showing the constitution of a back substrate of the image display device according to the present invention;

FIG. 8 is a plan view of an essential part showing the constitution of a face substrate of the image display device according to the present invention; and

FIG. 9 is an enlarged cross-sectional view of an essential part showing the constitution of a phosphor screen formed on the face substrate of the image display device according to the present invention.

Claims

1. An image display device comprising a vacuum envelope in which a back substrate on which a plurality of electron emission sources are formed and a face substrate on which an anode and phosphors are formed are arranged with a predetermined gap therebetween and a space defined between the back substrate and the face substrate is hermetically sealed, wherein a room member which forms a getter room communicated with the vacuum envelope is joined to an external surface of the back substrate, a getter assembly is arranged in the inside of the getter room, the getter assembly includes a non-volatile getter material, a getter support which fixes the getter material and heats the getter material, and a pair of electrodes which is pulled out to the outside through the room member, wherein the getter support is fixed between the pair of electrodes.

2. An image display device according to claim 1, wherein the getter room is communicated with the inside of the vacuum envelope via a through hole formed in the back substrate.

3. An image display device according to claim 1, wherein the room member includes an exhaust hole formed in a bottom surface portion and an exhaust pipe is connected to the exhaust hole.

4. An image display device according to claim 1, wherein the getter material is arranged between an outer surface of the back substrate and a surface of the room member which is arranged to face the outer surface of the back substrate.