JPH01298628A - Plate display device - Google Patents

Abstract

PURPOSE:To facilitate electrode taking-out and simplify construction by taking out a part of plate panels provided with control electrodes in succession to an envelope and taking out a terminal of an electrode wiring along the plate panel surface. CONSTITUTION:An electrode substrate 11 is composed of a plate panel of a sensitive glass or the like while being sealed to a substrate 1 or the spacers 8 and 16 with low melting point glass. At this time, a part of the electrode substrate 1 having a taking-out part of a control electrode 14 and an acceleration electrode 15 is taken out directly outside an envelope. Further, the insulating spacers 8 and 16 are formed an bloc being sealed by a sealing part 5 so that a spacer to become an envelope is not specially needed. Accordingly, taking-out of an electrode is facilitated so that the construction is simplified.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a flat display device using electron beams.

[Prior Art] Conventionally, liquid crystal display devices, EL display devices, and plasma display panels have been put into practical use as flat display devices, but the viewing angle and colorization have been limited.

The brightness level is insufficient for displaying images.

In particular, compared to cathode ray tubes (CRTs), the difference in display performance is large, and the situation has not reached a point where it can be replaced by cathode ray tubes.

On the other hand, as information processing by computers becomes more sophisticated and the image quality of television broadcasting becomes higher, the need for high-definition, large-screen flat display devices is rapidly increasing.

For this reason, several electron beam acceleration type flat display devices for displaying images have been proposed.For example, as shown in U.S. Pat. has an electron source, extracts an electron beam from this electron source,
The configuration is such that the irradiation is controlled and accelerated by a group of control electrodes provided with a large number of holes corresponding to the phosphor pixels, and the planar phosphor screen is irradiated with light, causing the desired phosphor pixels to emit light.

[Problems to be Solved by the Invention] Here, the planar electron source is composed of a cold cathode that utilizes the photoelectric effect, a hairpin-shaped or coil-shaped thermionic cathode, and this cold cathode has a stable and homogeneous structure. It is difficult to obtain a cold cathode and electron multiplier, and a thermionic cathode has the problem of high power consumption and unavoidable heat generation, so it is not easy to realize it.

In addition, the configuration of the control electrode group also requires electron multiplication, and in the case of a hot cathode, the response characteristics of the electron source are poor, making switching impractical, so at least orthogonal control electrodes are required to scan the screen. The disadvantage is that the structure is very complicated and manufacturing is extremely difficult.

[Means for Solving the Problems] The present invention has been made to solve the various problems mentioned above, and an object of the present invention is to provide a flat display device that has a simple configuration and is easy to manufacture.

That is, the flat display device of the present invention includes an electron source arranged in a planar manner, a plurality of control electrodes for extracting beams from the electron source and performing modulation control or acceleration, and a phosphor that emits light when the electron beam collides with the electron source. A fluorescent screen that forms pixels,
Consisting of an insulating spacer that maintains the gap between each, and an envelope that keeps the components in a vacuum, a part of the plate-like panel on which the control electrode is arranged is directly and continuously taken out of the envelope, and the electrode wiring By taking out the terminal along the plate panel surface,
The electrodes can be taken out easily, and by sealing the outer periphery of the plate-like panel integrally formed with the insulating spacer as part of the envelope, the structure is simple and easy to manufacture.

[Example] Next, an example of the flat display device of the present invention will be described with reference to the drawings.

FIG. 1 is an exploded perspective view of a flat display device of the present invention. 1 is a substrate made of a glass plate or the like, on which electron emitting parts 2 are arranged in a planar manner corresponding to pixels.
A single surface conduction type emission element is used for the electron emission section 2 of the present invention. This device utilizes the phenomenon in which electrons are emitted when a current is passed through a small-area thin film formed on a substrate.
On) et al. have reported the use of 5n02 (Sb) thin film [Radio Engineering Electron Physics (Radio Eng, Elec
Tron, Phys,) Volume 10, 1290-129
6, 1985], and this emitter is made of Au.
Thin films, ITO thin films, and carbon thin films have also been reported, and relatively high electron emission efficiency has been obtained.

Since these surface conduction type emission elements have a simple structure, a large number of elements can be arranged in a plane, and since they are cold cathodes, there is no need to worry about heat generation.

The electron emitting section 2 on the substrate l is made of a thin film element such as Au, ITO, or carbon that can emit electrons, and the electrode 3.4 is made of a conductive film such as a thick silver paste or a thin aluminum film.
The wires are connected in a line shape in the X direction in the figure. Here, the electrode 4 is a common ground line.

Further, an exhaust hole 6 is provided on the substrate 1, and an exhaust pipe 7 is welded with low melting point glass.

A spacer 8 made of an insulating material such as photosensitive glass is provided on the substrate 1, and is provided with a ventilation groove 9 and a groove 10 through which the electron beam from the electron emission section 2 passes.

Next, there is an electrode substrate 11, which is made of an insulating material such as photosensitive glass, and is provided with ventilation grooves 12 and small holes 13 through which electron beams pass, at positions corresponding to the respective pixels. Electrode substrate 11
On the side of the substrate 1, a control electrode 14 made of a metal film such as Ai', Or-Cu-Or, etc. is provided in parallel along the Y direction in the figure, and on the opposite side there is a control electrode 14 made of a metal film such as Ai' or Or-Cu-Or.

AI! , C An accelerating electrode 15 made of a metal film such as -Cu-Cr is provided in common to all pixels.

Furthermore, there is a spacer 16 made of an insulating material such as photosensitive glass on top of the spacer, and a ventilation groove 17 and a groove 18 through which the electron beam passes are provided.

Finally, there is a face plate 19 made of a glass plate, on which phosphors 20 are formed in a line shape in the Y direction on the surface on the substrate l side, and a metal back layer is formed on the surface of the phosphors as shown in the cross-sectional view of FIG. 21 is AI! It is formed by vapor deposition.

The substrate 1 described above. Spacer 8. '7m! Pole substrate ll, spacer 113. The sealed portion 5 on the outer periphery of the face plate 18 is baked and sealed with low-melting glass or the like to form a vacuum envelope, evacuated through the exhaust pipe 7, and sealed with a burner or the like to form a flat display. be done.

At this time, the exhaust hole 6 is connected to the ventilation groove 9 of the spacer 8, and further connected to the ventilation groove 12 extending in the Y direction of the electrode substrate 11.
Leads to. This ventilation groove 12 is also connected to the ventilation groove 17 of the spacer 16 and the groove 18 through which the electron beam passes.
Since it overlaps the groove 10 through which the electron beam passes, all the spaces within the flat display can be communicated and evacuated.

At that time, the substrate 1. face plate 1
Atmospheric pressure is applied to both sides of 9, but insulating spacer 8.16
It has a structure that supports atmospheric pressure by the partition wall of the groove through which the electron beam passes.

Next, the operation of the flat display having the above configuration will be explained.

In the cross-sectional view of FIG. 2, by applying a voltage to the electrodes 3 and 4, electrons are emitted from the electron emitting part 2, and by applying a voltage to the control electrode 14, electrons are extracted to the small hole 13, and by the accelerating electrode 15. The phosphor 2 is accelerated and further accelerated by the metal back layer 21 to which a high voltage is applied.
It collides with 0 and emits light.

At this time, by changing the voltage applied to the control electrode 14, the electron beam can be modulated and controlled.

In FIG. 1, the electron emitting parts 2 arranged in a line in the X direction are sequentially scanned line by line, and the control electrodes 1 arranged in a line in the Y direction are scanned line by line.
4 is sequentially scanned based on the modulation signal, it becomes possible to display a desired image.

In the flat display of the present invention, the electrode substrate 11 is made of a plate panel of photosensitive glass or the like, and can be sealed to the substrate 1 or the spacers 8 and 16 using low melting point glass. Therefore, as shown in FIG. 1, a part of the electrode substrate 1 where the control electrode 14 and acceleration electrode 15 are taken out can be directly taken out of the envelope.

Further, by integrally forming the insulating spacers 8 and 16 and sealing them with the sealing portion 5 on the outer periphery, there is no need for a special spacer serving as an envelope.

[Effects of the Invention] As explained above, a part of the plate panel on which the control electrodes are arranged is continuously taken out to the envelope, and the electrode wiring terminals are taken out along the plate panel surface, thereby making it possible to take out the electrodes. becomes easier and the structure becomes simpler.

Further, by integrally forming the insulating spacer and sealing its outer periphery, the structure becomes simple and manufacturing becomes easy.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view of the present invention, and FIG. 2 is a sectional view of the present invention.

Claims (2)

[Claims] (1) An electron source arranged in a planar manner, a plurality of control electrodes that extract electron beams from the electron source and perform modulation control or acceleration, and a phosphor screen with phosphor pixels that emit light when the electron beams collide with each other. In a flat display device consisting of an insulating spacer that maintains a gap between each of the components, and an envelope that keeps the components in a vacuum, a part of the plate panel on which the control electrode is arranged is continuous outside the envelope. A flat display device characterized in that the terminals of the electrode wiring are taken out along the surface of the flat panel. (2) The flat display device according to claim 1, wherein the insulating spacer is integrally formed with a plate-like panel, the outer periphery of which constitutes a part of an envelope.