JPH08222156A - Image display device - Google Patents

Abstract

PURPOSE: To improve horizontal resolution in an image display device using linear hot cathodes for electron beam sources. CONSTITUTION: An envelope 1 is constituted of a front plate 2, a back plate 3, and side plates, and the inside is evacuated. Many electrode base materials 9, 10 extended in the vertical (longitudinal) direction and the horizontal (lateral) direction are provided on the back plate 3. Horizontal focusing/deflecting electrodes 15 are formed on the upper faces and side faces of the vertically extended base materials 9 by thick film printing, and vertical focusing/deflecting electrodes 17 are formed on the upper faces and side faces of the horizontally extended base materials 10. Many vertically extended modulating electrodes 6 are arranged in the horizontal direction on the back plate 3, linear hot cathodes 7 are arranged below the horizontal and vertical focusing/deflecting electrodes 15, 16 at the slightly apart positions above the modulating electrodes 6 and supported by stanchions 8. Cover electrodes 12 are provided at the slightly apart positions above the center sections of the linear hot cathodes 7.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to an image display for visually displaying characters, figures, etc. by scanning an electron beam emitted from a cathode in horizontal and vertical directions to impinge on a phosphor and controlling the amount of emitted electron beam. The present invention relates to a flat panel image display device that is suitable for a large screen, which can be made thin.

[0002]

BACKGROUND ART As a typical example of this type of image display device, one provided with one or a plurality of linear hot cathodes is known. The spot shape of the electron beam emitted from the hot cathode is determined according to the arrangement and shape of the hot cathode, and is generally elliptical, and there are a horizontally long one (long in the horizontal direction) and a vertically long one (long in the vertical direction). A horizontally long display image has a good vertical resolution but a poor horizontal resolution. Vertical electron beam spots are good for increasing horizontal resolution.

In order to produce a vertically elongated electron beam spot, it is preferable to provide a linear hot cathode extending in the vertical direction.

In another typical example of this kind of image display device, since the horizontal focusing deflection electrode for scanning the electron beam in the horizontal direction is provided on the rear face plate, it is generally lower than the position of the hot cathode. Become. For this reason, the horizontal scanning range of the electron beam by the pair of horizontal focusing / deflecting electrodes is narrowed, and many hot cathodes must be arranged in the horizontal direction.

Further, the one using a hot cathode requires a heating current, which requires power consumption.

[0006]

DISCLOSURE OF THE INVENTION The present invention is directed to a vertically elongated proper electron beam
The goal is to get the spot.

Another object of the present invention is to stretch a linear hot cathode in a vertical direction and to provide an aperture at a position above it so that a vertically long electron beam spot can be obtained.

A further object of the present invention is to widen the horizontal range covered by one hot cathode.

The present invention further aims at power saving of the image display device.

Further, the present invention is intended to increase the screen size and thickness of the image display device.

The image display device according to the present invention comprises a front plate having a phosphor and an anode provided on the inner surface thereof, a rear plate made of an insulator and a side plate, and an envelope whose interior is exhausted, and the rear plate. A first insulating member that extends in the vertical direction and a second insulating member that extends in the horizontal direction, and a first insulating member that extends in the vertical direction, which divides the region of FIG. Horizontal focusing and deflecting electrodes formed on the upper and side surfaces of the horizontal focusing deflecting electrode, respectively, and on the upper and side surfaces of the second insulating member extending in the horizontal direction and electrically insulated from the horizontal focusing and deflecting electrodes, A plurality of vertically extending modulation electrodes provided on the back plate between the first insulating members, at a height position slightly above the modulation electrodes, and Provided below the flat focusing deflection electrode are thermal cathodes provided in the respective small sections, and between the thermal cathode and the vertical focusing deflection electrode, and the thermal cathode is provided with the vertical focusing. A cover electrode that electrically shields the deflection electrode is provided.

According to the present invention, since the horizontal focusing deflection electrode is formed on the first insulating member and is located at a position higher than the height position of the hot cathode, the horizontal scanning range is widened. As a result, the horizontal range covered by one hot cathode is widened, and the number of hot cathodes can be reduced.

Further, since the cover electrode for shielding the hot cathode from the vertical focusing deflection electrode is provided, it is possible to prevent the electron beam generated from the hot cathode from being taken by the vertical focusing deflection electrode. Also, the shape of the aperture (hole) in the center of the cover electrode is square, rectangular, circular,
It can be any shape such as an ellipse.

In particular, when a linear hot cathode stretched in the vertical direction is used as the hot cathode, a vertically long electron beam spot is obtained and the horizontal resolution of the displayed image is improved.

Of course, it is also possible to use an arc-shaped hot cathode or a dot-shaped hot cathode as the hot cathode.

The shape of the above-mentioned small section can be any shape such as a square, a rectangle, a circle, and a polygon.

Since the first and second insulating members can be provided and the horizontal and vertical focusing deflection electrodes can be provided on the insulating members, the manufacturing is relatively easy.

Another image display device according to the present invention comprises a front plate having a phosphor and an anode provided on the inner surface thereof, a rear plate made of an insulator, and a side plate, an envelope whose interior is evacuated, and the rear plate described above. A first insulating member extending in the vertical direction and a second insulating member extending in the horizontal direction, the first insulating member extending in the vertical direction, which divides the area on the face plate in the horizontal direction and the vertical direction to form a plurality of small sections, Horizontal focusing deflection electrodes formed on the upper surface and side surfaces of the insulating member, and vertical focusing deflection electrodes formed on the upper surface and side surfaces of the second insulating member extending in the horizontal direction and electrically insulated from the horizontal focusing deflection electrode. An electrode, a plurality of vertically extending modulation electrodes provided on the back plate between the first insulating member, and a position slightly above the modulation electrode in each of the small sections. And field emission cathodes, respectively provided and includes an electron beam extraction electrode provided above the field emission cathode.

By using a field emission cathode (cold cathode) as the electron beam source, power saving can be achieved.

In a preferred embodiment, the shape of the plurality of small sections formed on the back plate is circular. As a result, the horizontal focusing deflection electrode and the vertical focusing deflection electrode are arranged at positions substantially equidistant from each other on the concentric circle from the electron beam emission position, so that a clean spot having a good shape can be obtained.

In another preferred embodiment, a horizontally extending support wall for supporting the front plate is erected on the second insulating member. As a result, damage to the image display device due to atmospheric pressure can be prevented, and the image display device can have a large screen and a thin shape.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a partially cutaway perspective view showing the entire image display device. 2A is an enlarged sectional end view taken along line AA of FIG. 1, and FIG. 2B is an enlarged sectional end view taken along line BB of FIG. 3C is an enlarged sectional end view taken along the line CC of FIG. 1, and FIG. 3D is an enlarged sectional end view taken along the line D-D of FIG.

In these drawings, the wall thickness (particularly the wall thickness of an electrode formed by thick film printing or the like described later) is emphasized to be thicker than it actually is, for the sake of convenience of drawing and easy understanding. . This also applies to other drawings.

Mainly referring to FIG. 1, an envelope 1 of an image display device includes a transparent front plate 2 made of glass or the like, arranged in parallel with an appropriate distance from the front plate 2 and having an insulating property. It is composed of a rear plate 3 made of a material and a side plate (not shown) that closes the space between the front and rear plates 2 and 3. The inside of the envelope 1 is exhausted.

On the inner surface of the front plate 2, there are provided a phosphor 4 which emits light by an electron beam and a metal back 5 which serves as an anode. The front plate 2 serves as a screen for displaying an image.

FIG. 4 shows an example of the arrangement of the phosphors 4 provided on the inner surface of the front plate 2. Phosphors 4a of three primary colors of R, G, and B which are long in the vertical direction are arranged in the horizontal direction to form one pixel. These pixels are partitioned by the black matrix 4b. The black matrix 4b extending in the vertical direction is slightly narrower than the one extending in the horizontal (horizontal) direction.

With reference to FIGS. 1 to 3, on the inner surface of the rear plate 3, a large number of horizontal electrode bases 9 and a large number of vertical electrode bases 10 are integrally formed in a grid pattern to form an electrode forming base. The material is provided on almost the entire surface and is fixed by adhesion or the like. This electrode forming substrate is made of an insulating material such as glass. The horizontal electrode base materials 9 extend in the vertical direction and are arranged in parallel in the horizontal direction at regular intervals. The vertical electrode substrates 10 extend in the horizontal direction and are arranged in parallel in the vertical direction at regular intervals. The horizontal electrode base material 9 and the vertical electrode base material 10 may be separately configured.

Communication holes 11 are formed in the lower portion of the vertical electrode base material 10 extending in the horizontal direction between the positions where the horizontal electrode base material 9 intersects with the vertical electrode base material 10 (FIG. 2).
(B)).

On the rear face plate 3, elongated modulation electrodes 6 extending in the vertical direction are formed at positions between the horizontal electrode base materials 9. The modulation electrode 6 is continuously formed through a communication hole 11 over a plurality of sections (blocks) formed by a support wall 18 described later. The modulation electrode 6 is for controlling the amount (including zero) of the electron beam emitted from the linear thermal cathode 7 to be described later according to the data representing the character or figure to be displayed, preferably thick film printing. (Thickness is about 10 μm).

A linear thermal cathode 7 extending vertically along the modulation electrode 6 is provided at a position slightly above the center of the modulation electrode 6 formed on the rear plate 3. The linear hot cathode 7 generates an electron beam by being heated by energization, and its surface is coated with an oxide (at least within the aperture 13 of the cover electrode 12 described later). The linear hot cathode 7 is also continuous through a plurality of blocks arranged in the vertical direction through the above-mentioned communication hole 11, and is supported by a pillar 8 standing on the modulation electrode 6 inside the communication hole 11 (Fig. 3 (C)).

The pillars 8 are formed of an insulating material, for example, frit glass. Preferably, the pillars 8 are formed by thinly stacking a crystalline glass paste by repeating thick film printing or photolithography.

As described above, since the linear hot cathode 7 is firmly fixed to each block by the pillars 8 fixed on the modulation electrode 6 at a short interval, it hardly vibrates even when an external force is applied. .

Further, an elongated cover electrode 12 extending vertically along the linear thermal cathode 7 is provided at a position slightly above the linear thermal cathode 7. The cover electrode 12 prevents the electron beam emitted from the linear hot cathode 7 from being deprived by the vertical focusing deflection electrode 17 described later, and the aperture 13 for passing the electron beam in the central portion of each block. Are formed.
The potential of the cover electrode 12 is kept at the ground potential or the same potential as the modulation electrode 6. The cover electrode 12 is preferably made of stainless steel or the like. The cover electrode 12 is also continuous over a plurality of blocks arranged in the vertical direction through the communication holes 11, and the eaves (step portion) 14 and the vertical electrode base 10 formed on both sides of the horizontal electrode base 9 extending in the vertical direction. It is fixed to the upper surface of the communication hole 11 by means of frit or glass. Since the cover electrode 12 thermally expands, it is desirable to fix it at a plurality of locations.

Horizontal focusing and deflecting electrodes 15 are formed on the upper and side surfaces of a plurality of horizontal electrode base materials 9 extending in the vertical direction. The horizontal focusing deflection electrode 15 is formed by coating a silver thin film or the like on the upper surface and the side surface of the horizontal electrode base material 9 made of an insulating material by thick film printing or oblique vapor deposition. The horizontal focusing deflection electrode 15 is spaced apart from the cover electrode 12 fixed to the eaves 14 of the base material 9 (that is, the cover electrode 12).
Needless to say, it is formed in a state of being electrically insulated from 12 (see FIG. 2A). The pair of horizontal focusing deflection electrodes 8 sandwiching the linear thermal cathode 7 focus the electron beam emitted from the linear thermal cathode 7 on the phosphor 4 of the front plate 2 and control horizontal scanning.

An insulating layer 16 is formed on the horizontal focusing deflection electrode 15 at the intersection of the base material 9 extending in the vertical (longitudinal) direction and the base material 10 extending in the horizontal (lateral) direction.
The insulating layer 16 is for electrically insulating the horizontal focusing deflection electrode 15 and the vertical focusing deflection electrode 17 described later, and is preferably formed by thinly applying a crystalline glass paste by thick film printing. . The insulating layer 16 can also be formed by photolithography.

Further, vertical focusing / deflecting electrodes 17 are formed on the upper and side surfaces of a plurality of vertical electrode base materials 10 extending in the horizontal direction. The vertical focusing deflection electrode 17 intersects the hot cathode 7. Like the horizontal focusing deflection electrode 15, the vertical focusing deflection electrode 17 is also formed by coating a silver thin film or the like on the upper surface and the side surface of the base material 10 by thick film printing or oblique vapor deposition. The vertical focusing deflection electrode 17 is electrically insulated from the horizontal focusing deflection electrode 15 by the insulating layer 16 described above. Similarly, the vertical focusing deflection electrode 17 is formed on the side surface of the base material 10 at a distance from the cover electrode 12 (that is, in a state of being electrically insulated from the cover electrode 12) (FIG. 3 (C)). reference). The vertical focusing deflection electrode 17 focuses the electron beam emitted from the linear hot cathode 7 onto the phosphor 4 of the front plate 2 and controls the vertical scanning of the electron beam.

A plurality of support walls are provided on the vertical focusing deflection electrode 17.
18 are erected. Part of the support wall 18 is a vertical electrode substrate
It reaches the back plate 3 through a vertical hole formed between ten holes 11. These support walls 18 extend horizontally from one side to the other side of the envelope 1 and are parallel to each other, and divide the interior of the envelope 1 vertically into a plurality of blocks.

The thickness of the support wall 18 becomes thinner toward the front, and the tip end thereof is in pressure contact with the inner surface of the black matrix 4b of the front plate 2. As a result, an easy-to-see screen with almost no shadow due to the support wall 18 on the display screen can be obtained. Further, it is possible to increase the size of the image display device.

Preferably, one linear hot cathode 7, one modulation electrode 6 and a pair of horizontal focusing and deflecting electrodes 15 on both sides of the one linear hot cathode 7 are provided for about 3 to 20 pixels in the horizontal direction on the display screen, or Share more than that. The range shared by one linear cathode 7 in one block is called a segment. Since the horizontal focusing / deflecting electrode 15 is provided above the hot cathode 7, the horizontal scanning range can be widened.

The modulation electrode 6 and the horizontal focusing deflection electrode 15 are
As described above, it may be continuous over a plurality of blocks or may be separated for each block. This depends on the scanning control method. When carrying out the scanning method described below, the modulation electrodes 6 are separated into blocks and electrically insulated from each other.

As described above, the linear hot cathode 7 extends in the vertical direction. Therefore, the horizontal focusing deflection electrode 15 and the vertical focusing deflection electrode 15 are emitted from the linear hot cathode 7.
The electron beam spot focused by 17 and applied to the phosphor 4 on the inner surface of the front plate 2 has a vertically long shape as indicated by the symbol SP in FIG. R, G and B phosphors 4a
Is vertical, the electron beam spot SP may be larger than the size of each phosphor 4a by the amount of the black matrix 4b. Since the width of each phosphor 4a in the horizontal direction is small and the width of the electron beam spot SP in the horizontal direction is also small, the horizontal resolution of the display image can be increased.

The horizontal and vertical scanning of the electron beam in the image display device having the above structure can be realized, for example, as follows.

First, the uppermost block is selected. One block is responsible for a plurality of (a plurality of pixels) horizontal scanning lines. During the first 1H (horizontal scanning period), a voltage is applied to the vertical focusing deflection electrode 17 so that the electron beam is focused on the uppermost horizontal scanning line (first horizontal line). A heating current is passed through the linear hot cathode 7. A scanning voltage is applied to the horizontal focusing deflection electrode 15 so that the electrons emitted from each linear hot cathode 7 move within the range of one segment. A voltage reflecting the image data is applied to the modulation electrode 6 according to the scanning position of the electron beam. The image data is preferably pre-stored in memory.

During the period of 1H, each linear hot cathode 7
Since the electron beam emitted from the electron beam needs to be scanned over the width in the horizontal direction of the segment in charge of the linear hot cathode 7, the brightness is high.

In the next 1H period, the scanning voltage is applied to the vertical focusing deflection electrode 17 so that the electron beam is focused on the next horizontal scanning line (second horizontal line). Similarly, the electron beam is horizontally scanned within the range of each segment in accordance with the scanning voltage applied to the horizontal focusing / deflecting electrode 15, and the voltage representing the image data corresponding to the scanning point is modulated by the modulation electrode 6. Applied to.

In this way, the horizontal scanning for each 1H period is sequentially repeated while shifting the position of the scanning line in the vertical direction, and when the scanning is completed over the entire vertical width of the uppermost block, the second scanning is performed. Move on to the scan in the block. Also in the second block, horizontal and vertical scanning are performed within the range of the block.

Scanning in all blocks is completed during 1 V (vertical scanning period), and a one-screen image appears. 1
The above operation is repeated for each V period.

Preferably, when each linear hot cathode 7 is horizontally numbered from the end as 1, 2, 3, 4, ...
A heating current is alternately applied to the odd-numbered linear thermal cathodes 7 and the even-numbered linear thermal cathodes 7. The period during which the electric current is passed through the linear hot cathode 7 is H / 2. The period during which no heating current is passed is H / 2. During the period when the heating current is not flowing through the linear thermal cathode 7 (at this time, the linear thermal cathode 7 is preferably kept at the potential 0V), the image data is displayed on the modulation electrode 6 directly below the linear thermal cathode 7. A corresponding voltage is applied, and a scanning voltage for scanning the electron beam within the horizontal range of one segment is applied to the horizontal focusing deflection electrode 15. Since the linear hot cathode 7 is sufficiently heated, the residual heat emits an electron beam to display an image. While the heating current is flowing, a negative voltage is applied to the modulation electrode 6 directly below the linear hot cathode 7, and no electron beam is emitted from the linear hot cathode 7.

When a heating current is passed through the linear hot cathode 7, a resistance difference causes a potential difference between a part of the linear hot cathode 7 and another portion. Due to this potential difference, the amount of electron beam emitted from the linear thermal cathode 7 varies depending on the location.

When an electric current is alternately applied to the above-mentioned odd-numbered and even-numbered linear thermal cathodes and an image is achieved by the electron beam emitted from the linear thermal cathode 7 when the heating current is not flowing, image display is achieved. The electron beam that contributes to is not affected by the above-mentioned potential difference, and uniform brightness can be maintained on the entire screen.

The period of the rectangular current for driving the linear hot cathode 7 is set to H / 3 (the period during which the heating current is supplied and the period during which the heating current is not supplied are H / 6), and during each H / 6 period,
You may make it scan one kind of R, G, and B fluorescent substance.

FIG. 5 shows another example of the cover electrode.
In the embodiment shown in FIGS. 1 to 3, the cover electrode 12 covers the entire area surrounded by the horizontal focusing deflection electrode 15 and the vertical focusing deflection electrode 17 except for the aperture 13. In the embodiment shown in FIG. 5, the cover electrode 12A is provided so as to cover only the portion of the linear hot cathode 7 near the vertical focusing deflection electrode 17. These cover electrodes 12A are attached and fixed to the base material 9 or the base material 10.

FIG. 6 shows another example of the shape of the horizontal and vertical focusing deflection electrodes. The side edges of the base materials 9 and 10 are formed so that the region surrounded by the integrated horizontal electrode base material 9 and vertical electrode base material 10 has a circular shape (circular opening). Part of the horizontal and vertical focusing deflection electrodes 15 and 17 extends along the side surface of the circular opening to a position where they do not contact the cover electrode 12.

Horizontal focusing deflection electrode 15 and vertical focusing deflection electrode 17
Are arranged concentrically from the electron beam emission position at positions equidistant from each other, so that a clean electron beam spot with a good shape can be obtained. Horizontal and vertical electrode substrates 9, 10
The shape of the area surrounded by may be other shapes such as an octagon other than the above-mentioned square and circle.

In addition to the linear hot cathode 7 described above, an arched hot cathode or a dot hot cathode may be used as the cathode.

7 and 8 show an example in which a field emission cathode (cold cathode) is used as the electron beam source instead of the linear hot cathode.

7 and 8, the same components as those shown in FIGS. 1 to 3 are designated by the same reference numerals to avoid redundant description. Description will be given focusing on the points different from the above-mentioned example.

Instead of the linear thermal cathode 7, a field emission cathode 20 is provided for each segment at a position slightly above the modulation electrode 6 formed on the rear plate 3. The field emission cathode 20 emits an electron beam by applying a strong electric field without heating, and has low power consumption. A grid 21 is provided above the field emission cathode 20, preferably integrally with the cathode 20 while maintaining electrical insulation. The field emission cathodes 20 and the grid 21 arranged in the vertical direction are electrically connected to each other by a wiring pattern (not shown) extending on the rear plate 3 through the communication holes 11 in the vertical direction.

Instead of the cover electrode 12, an elongated electron beam extraction electrode (anode) 22 extending in the vertical direction is provided at a position slightly above the field emission cathode 20. The electron beam extraction electrode 22 is a field emission cathode.
It is for emitting electrons by applying a strong electric field to the surface of 20, and is formed in a mesh shape at the position where the electron beam is emitted from the field emission cathode 20. The electron beam extraction electrode 22 is also continuous through a plurality of blocks arranged in the vertical direction through the communication hole 11, and is fixed to the eaves 14 formed on the side surface of the base material 9 extending in the vertical direction by frit glass or the like at a plurality of positions. ing.

By using the field emission cathode 20 as the electron beam source, it is possible to reduce the power consumption of the image display device.

In the above-mentioned drawings, the modulation electrode 6, the linear hot cathode 7, the horizontal focusing deflection electrode 15, the vertical focusing deflection electrode 17,
Although the wiring patterns for passing a current or applying a voltage to the field emission cathode 20 and the electron beam extraction electrode 22 are not shown in the drawing, these wiring patterns are not insulated from each other by a known method. It may be formed on the face plate 3.

[Brief description of drawings]

FIG. 1 is a partially cutaway perspective view showing an entire image display device.

2A is an enlarged sectional end view taken along line AA of FIG. 1, and FIG. 2B is an enlarged sectional end view taken along line BB of FIG.

3 (C) is an enlarged sectional end view taken along the line CC of FIG. 1, and FIG. 3 (D) is an enlarged sectional end view taken along the line DD of FIG.

FIG. 4 shows an arrangement example of phosphors.

FIG. 5 is a partially cutaway perspective view corresponding to FIG. 1 showing another example of the cover electrode.

FIG. 6 is a partially cutaway perspective view showing another example of horizontal and vertical focusing deflection electrodes.

7 is an enlarged cross-sectional end view corresponding to FIG. 2A, showing an example in which a field emission cathode is used as an electron beam emission source.

FIG. 8 is an enlarged sectional end view corresponding to FIG. 3C, showing an example in which a field emission cathode is used as an electron beam emission source.

[Explanation of symbols]

 1 Enclosure 2 Front Plate 3 Rear Plate 6 Modulation Electrode 7 Linear Thermal Cathode 8 Pillar 9 Horizontal Electrode Base 10 Vertical Electrode Base 13 Aperture 15 Horizontal Focusing Deflection Electrode 16 Insulating Layer 17 Vertical Focusing Deflection Electrode 20 Field Emission Cathode 21 Grid 22 Electron beam extraction electrode

Claims (6)

[Claims] 1. An envelope having a front plate having a phosphor and an anode provided on an inner surface thereof, a rear plate made of an insulator, and a side plate, the interior of which is evacuated, and a region on the rear plate being horizontally and A first insulating member extending in the vertical direction and a second insulating member extending in the horizontal direction, each of which is divided in the vertical direction to form a plurality of small sections, and on the upper surface and the side surface of the first insulating member extending in the vertical direction, respectively. The formed horizontal focusing deflection electrode, the vertical focusing deflection electrode formed on the upper surface and the side surface of the second insulating member extending in the horizontal direction and electrically insulated from the horizontal focusing deflection electrode, and the first insulating member. Between the plurality of vertically extending modulation electrodes provided on the rear plate, at a height position slightly above the modulation electrodes and below the horizontal focusing deflection electrodes. And a thermal cathode provided in each of the small sections, and a position between the thermal cathode and the vertical focusing deflection electrode, and the thermal cathode is electrically connected to the vertical focusing deflection electrode. An image display device having a cover electrode for shielding. 2. The hot cathode is a linear hot cathode, the linear hot cathode is stretched vertically along the modulation electrode, and is supported by insulating columns at a plurality of locations. 1. The image display device according to 1. 3. The image display device according to claim 1, wherein the cover electrode covers substantially the entire area of the small section, and an aperture for passing an electron beam is opened in the center. 4. An envelope having a front plate having a phosphor and an anode provided on the inner surface thereof, a rear plate made of an insulator and a side plate, the interior of which is evacuated, and the region on the rear plate being horizontally and horizontally. A first insulating member extending in the vertical direction and a second insulating member extending in the horizontal direction, each of which is divided in the vertical direction to form a plurality of small sections, and on the upper surface and the side surface of the first insulating member extending in the vertical direction, respectively. The formed horizontal focusing deflection electrode, the vertical focusing deflection electrode formed on the upper surface and the side surface of the second insulating member extending in the horizontal direction and electrically insulated from the horizontal focusing deflection electrode, and the first insulating member. Between the plurality of vertically extending modulation electrodes provided on the back plate, and the field emission cathodes provided at positions slightly above the modulation electrodes in each of the small sections. And an electron beam extraction electrode provided above the field emission cathode. 5. The plurality of small sections formed on the rear face plate are circular in shape, and a part of the horizontal and vertical focusing deflection electrodes extends downward along the peripheral line of this figure.
5. The image display device according to any one of items 4 to 4. 6. The image display according to claim 1, wherein a support wall extending in a horizontal direction for supporting the front plate is erected on the second insulating member. apparatus.