Image Display Device

Abstract

In an image display device, end surfaces of spacers are jointed to substrates in a state that the spacers bite into a conductive adhesive material 13 in the depth direction of a coating thickness of the conductive adhesive material. Due to such a constitution, it is possible to provide the image display device which possesses high brightness, high reliability and a prolonged lifetime by suppressing the breakage and the deformation of distance holding members which hold a distance of a hermetically sealed space surrounded by a face substrate, a back substrate and a frame body.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a plan view for explaining one embodiment of an image display device according to the present invention as viewed from a face substrate side;

FIG. 2 is a side view as viewed in the I direction in FIG. 1;

FIG. 3 is a schematic plan view of a back substrate shown by removing the face substrate shown in FIG. 1;

FIG. 4 is a schematic cross-sectional enlarged view showing the back substrate taken along a line II-II in FIG. 3 and the face substrate corresponding to the back substrate;

FIG. 5 is an enlarged schematic cross-sectional enlarged view of an essential part of the back substrate taken along a line III-III in FIG. 3;

FIG. 6A, FIG. 6B and FIG. 6C are views for explaining an example of electron sources 10 which constitute pixels of the image display device of the present invention, wherein FIG. 6A is a plan view, FIG. 6B is a cross-sectional view taken along a line A-A′ in FIG. 6A, and FIG. 6C is a cross-sectional view taken along a line B-B′ in FIG. 6A; and

FIG. 7 is a view of an example of an equivalent circuit of the image display device to which the constitution of the present invention is applied.

Claims

1. An image display device comprising: a face substrate which includes phosphor layers and an anode electrode;a back substrate which includes electron sources and faces the face substrate in an opposed manner with a predetermined distance therebetween;a frame body which is interposed between the face substrate and the back substrate and is arranged so as to surround an image display region, and holds the predetermined distance between the substrates; anda plurality of distance holding members which is arranged in the inside of the display region between the face substrate and the back substrate;a conductive adhesive material which fixes end surfaces of the distance holding members with the face substrate and the back substrate respectively, whereinthe end surfaces of the frame body and the face substrate and the back substrate being hermetically sealed to each other respectively by way of a sealing material,the distance holding members are jointed to both substrates in a state that the distance holding members bite into the conductive adhesive material in the depth direction of coating thickness of the conductive adhesive material.

2. An image display device according to claim 1, wherein the conductive adhesive material contains a conductive material which imparts conductivity to the adhesive material.

3. An image display device according to claim 1 or claim 2, wherein a width of the conductive adhesive material is set larger than a width of the distance holding member.

4. An image display device according to claim 3, wherein the width of the conductive adhesive material is set at least twice or more as large as the width of the distance holding member.

5. An image display device according to claim 1, wherein the distance holding member is made of a ceramic material and has a total length of 200 mm or less.

6. An image display device according to claim 1, wherein the distance holding member possesses a resistance value of 10 to 109 Ω·cm.

7. An image display device according to claim 1, wherein the back substrate includes, a plurality of scanning signal lines which extend in one direction and are arranged in parallel to another direction which intersects one direction,a plurality of image signal lines which extend in another direction and are arranged in parallel in one direction,the electron sources which are arranged in the vicinity of respective intersecting portions of the scanning signal lines and the image signal lines, andpower supply electrodes which connect the electron sources, the scanning signal lines and the image signal lines respectively.

8. An image display device according to claim 7, wherein the distance holding members are arranged in a state that the distance holding members are overlapped to the scanning signal lines and extend in the same direction as the scanning signal lines.

9. An image display device comprising: a face substrate which forms a black matrix film in which a plurality of opening portions are formed, phosphor layers having a plurality of colors which are arranged in a state that the phosphor layers close the opening portions and extend over the black matrix film, and an anode electrode which is made of a metal thin film and covers the phosphor layers and the black matrix film on an inner surface thereof;a back substrate which forms a plurality of scanning signal lines which extend in one direction and are arranged in parallel to another direction which intersects one direction, a plurality of image signal lines which extend in another direction and are arranged in parallel to one direction, and electron sources which are provided in the vicinity of respective intersecting portions of the scanning signal lines and the image signal lines on an inner surface thereof, and faces the face substrate in an opposed manner with a predetermined distance therebetween;a frame body which is interposed between the face substrate and the back substrate in a state that the support body surrounds a display region and holds the predetermined distance;a plurality of distance holding members which are arranged to be overlapped to the scanning signal lines and extend in the same direction as the scanning signal lines between the face substrate and the back substrate and within the display region; anda conductive adhesive material which fixes end surfaces of the distance holding members and the face substrate and the back substrate to each other by adhesion,the end surfaces of the frame body and the face substrate and the back substrate being hermetically sealed to each other by way of a sealing material, whereinthe distance holding members are jointed to both substrates in a state that the distance holding members bite into the conductive adhesive material in the depth direction of coating thickness of the conductive adhesive material.

10. An image display device according to claim 9, wherein the distance holding members are arranged in a state that the distance holding members are overlapped to the scanning signal lines and extend in the same direction as the scanning signal lines.