JPS6336292A - Video former - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an image forming apparatus, and in particular, an image forming apparatus that controls the emission of electrons within a thin vacuum container, and forms an image by causing a light body to emit light at the first step. The present invention relates to an image forming apparatus.

[Summary of the Disclosure] The present specification and drawings describe an image forming apparatus that is provided with an electron guide section that guides electrons from an electron emitting means and an extraction mechanism that extracts electrons, and that is provided on the surface of an electrode forming the electron guide section. By attaching a secondary electron emitting material and propagating the electron beam 9 highly efficiently over the entire area of the displayed image, the structure is simple, manufacturing is easy and low cost, and images are formed with a thin structure and high display quality. The present invention discloses a technology for making the device.

[Background Art] In recent years, with the development of information processing technology, demand for various display devices has increased in a wide range of fields including offices. Among these, there is a strong demand for a board-type display device with good visibility. In order to meet this demand, various thin displays have been attempted, such as the USP 402
According to the method disclosed in Japanese Patent No. 8582, a vacuum container formed by a display panel coated with a phosphor on the inside, a back panel, and a side wall panel is provided with a partition plate that divides the container into a plurality of channels. , a conventional device comprising an electron source that emits an electron beam, a guide means for making the electron beam travel parallel to the display panel along the chamoru, and a deflection means for selectively deflecting the electron beam toward the phosphor screen. Also, extremely thin display devices have been proposed.

[Problems to be Solved by the Invention] However, in the conventional display device described above, the electron beam emitted by the electron source may diffuse while traveling through the guide means unless some control means is taken. In many cases, it was absorbed by the guide wall and did not reach the remote point. Therefore, if the display area is located far from the electron source, the brightness of the displayed image will decrease. To compensate for this, electrons are supplied at a uniform density regardless of the position of the display area. For example, USP 4
As disclosed in Japanese Patent No. 103204, attempts have been made to use a method (slalom focus sync) in which a t-g beam is propagated while meandering within a beam guide, and a method using a principle similar to that of a so-called traveling wave tube. There is.

However, in the slalom focusing method, the electron optical system for meandering the electrons is extremely complicated. For example, in order to construct a wire electrode array with high positional accuracy as disclosed in the above-mentioned USP 4,103,204, it is necessary to The manufacturing process requires approximately 100% of manufacturing time, leading to an increase in cost, and the wire electrodes are susceptible to mechanical errors due to vibrations and temperature changes, making it difficult to obtain reliability worthy of practical use.

On the other hand, in a system using a principle similar to that of a traveling wave tube,
Since the electron beam is modulated at a high frequency, the scale of the electrical circuit required for this increases, and power consumption inevitably increases.Furthermore, fluctuations in the modulation frequency may degrade the quality of the displayed image. Furthermore, the grid electrodes and extraction electrodes that make up the beam guide must be configured with high positional accuracy, which also increases manufacturing costs.

The present invention has been made in view of these problems, and has a structure that allows electron beams to be propagated across the entire display screen with high efficiency, has a simple structure, is easy to manufacture, and is inexpensive.
An object of the present invention is to provide an image forming apparatus that is thin and has high display quality.

[Means for Solving the Problems] In the present invention, the means taken to solve the problems listed in "-" will be explained using FIG. 1 corresponding to the embodiment. and a back plate 15 parallel to the display plate 14, and a display part with a vacuum container 1 formed therebetween; a cathode 2, which is an electron emitting means, disposed on one side of the display part, and a first electrode 12. , a second electrode 13, a plurality of parallel partition walls 3 that partition the inside of the vacuum vessel 1, and a plurality of parallel partition walls 3 that are arranged in a part of a channel 4 formed by the partition walls 3 and parallel to the longitudinal direction of the channel 4. Flat electrode 5 and perforated electrode 6
and a phosphor 9 that is attached to the inside of the display panel 14 and emits light by the projection of electrons extracted from the openings of the perforated electrodes 6 when passing through the electronic guide section. The present invention is an image forming apparatus in which secondary electron emitting materials 10 and 11 are attached to the surface of an electrode forming an electron guide section.

[Function] In the present invention, since the secondary electron emitting material is attached to the electrode member of the electron guide part, the electrons passing through the electrode member collide with the material and further emit secondary electrons. , the electron beam is propagated with high efficiency over the entire area of the display screen.

Since the reach distance of the electrons has been extended in this way, the electrons emitted from one side of the rectangle are also spread over the entire surface of the display board, -t nR
By controlling and accelerating these electrons within each channel, it becomes possible to emit light with multiple gradations of brightness at a desired point on the phosphor screen.

[Example] Fig. 1 is a perspective view showing a schematic structure of an example of a display device embodying the present invention, and Fig. 2 is a longitudinal sectional view of the example.

In both figures, a display device 100 includes a rectangular display panel 14 and a back panel 15 parallel to the display panel 14 to form a vacuum container 1 serving as a display section, and a cathode 2 serving as an electron emitting means on the upper side. is installed. The inside of the vacuum container 1 is partitioned vertically and horizontally by a plurality of parallel partition walls 3, and a band-shaped flat plate electrode 5 and a perforated electrode are arranged on the back plate 15 side of a channel 4 formed almost perpendicularly to the display panel 14 by the partition walls 3. 6 are inserted in the vertical direction in parallel to form an electron guide section from the cathode 2. Inside the vacuum vessel 1, horizontal control electrodes 7 that communicate with each channel 4 in the horizontal direction and vertical control electrodes 8 that communicate with each channel 4 in the vertical direction are arranged in an x-Y matrix, This constitutes an extraction mechanism for extracting electrons from desired openings in the perforated electrode 6. A phosphor 9 is coated on the inside of the display panel 14, and secondary electron emitting materials 10 and 11 are attached to the flat electrode 5 and the perforated electrode 6.

FIG. 3 is an explanatory diagram showing details of the electron distribution guide section. In FIG. 3, a rod-shaped cathode 2 is surrounded by a first electrode 12 having a U-shaped cross section and a second electrode 13 having an opening 11. The second electrode 13 is given a positive potential of about IOV to 500 V (preferably 200 V), and the cathode 2 is heated and thermionic electrons are emitted. , the electron is stimulated by the potential difference and becomes 1(
It is implanted between the i-plate electrode 5 and the perforated electrode 6. ≦The V-plate electrode 5 and the perforated electrode 6 are given a positive potential, and electrons travel between the two electrodes, and some of them collide with the picture electrode. As already explained, the flat electrode 5 and the perforated electrode 6 have =-
Since the secondary electron-emitting material is attached, secondary electrons are emitted by this collision, and sufficient electrons can reach channels remote from the cathode 2.

Now, in Figures 1 and 2, -! The primary electrons and secondary electrons shown in - are extracted from the opening of the perforated electrode 6 to a desired channel by the lateral control electrode 7, and further controlled by the vertical control electrode 8.

The phosphor 9 is provided with a metal back made of an aluminum film or the like as a conductive treatment, and a high voltage of, for example, 6 kV is applied to that surface. The electrons that have passed through the vertical control electrode 8 are accelerated toward the phosphor screen, collide with the phosphor 9, and emit light.

Examples of the secondary electron emitting material attached to the flat electrode 5 and the perforated electrode 6 include Mg, Cs, Ca, and Pb.

Metals such as or their oxides are used, and when these are provided as a film, the number of electrons transported between the electrodes can be maintained at a large number. In addition, such a film can be formed relatively easily; for example, it can be created by a process such as mixing a substance with high secondary electron emission efficiency as described above with an organic binder, applying it, and then baking it. be able to.

In addition, a high-purity alloy of aluminum and magnesium was used as an electrode, and after cleaning the surface, 101 to 1O-
A magnesium oxide film can be formed by maintaining the temperature at 450° C. for 1 to 4 hours in an oxygen atmosphere of 1 torr.

That is, the aluminum on the surface becomes aluminum oxide, making it difficult for oxygen to diffuse into the alloy, and at the same time, the magnesium within the alloy is diffused and reaches the surface, forming a magnesium oxide layer.

Alternatively, an alkoxide such as methoxymagnesium, methoxycalcium, or methoxycalcium is coated or vapor-deposited on the electrode, and then thermally decomposed in an oxygen atmosphere.
Those who form a film of calcium oxide or magnesium oxide V
, there is also. Furthermore, a similar film can be formed using calcium or magnesium acetonate instead of alkoxide. According to these, Q r in the atmosphere
The process can be simplified by assembling a vacuum container and then activating it, and in some cases it is also possible to directly evaporate oxidizing power Lucium J1 and magnesium oxide.Furthermore, , alkoxide,
After hydrolyzing acetonate, it may be converted into an oxide by heat treatment.

In addition, when glass is used for the structure of the channel 4, a method of using glass containing lead and precipitating lead on the glass surface using hydrogen can also be considered.

If the secondary electron emitting material is not attached, and the distance between the flat plate electrode 5 and the perforated electrode 6 is 3ffflI11, the electron travel distance is about 1ocffl, but the secondary electron emitting material is not attached. Then, it started reaching up to about 100cm.

Since the reach of the electrons has been extended in this way, it is now possible to sufficiently spread the electrons emitted from the - side of the rectangle to the entire screen of the display board, and these electrons can be controlled and controlled within each channel. By accelerating, it is also possible to emit light with multiple gradations of brightness at a desired point on the phosphor 9.

Note that even when the present invention is applied to a slalom focusing type beam guide, the same effects as in this embodiment can be expected.

-1- Although the embodiment described above is for a display device, the image forming apparatus according to the present invention can also be applied to a hard copy device. That is, the electrons emitted from the - side or one end are guided by a guide member and deflected at an arbitrary position,
After being controlled and accelerated, it is emitted from a vacuum into the atmosphere through a window phase made of metal or SiC, and an image is formed by charging a dielectric material, which is then transferred and fixed onto paper, etc. A hardcopy device can be configured.

Further, according to the present invention, a display device can be constructed by generating plasma by emitting electrons guided in a vacuum during a required induction period.

[Effects of the Invention] As described above, according to the present invention, by attaching the secondary electron emitting material to the electron guide electrode, the electron beam can be propagated with high efficiency over the entire area of the display screen. Therefore, it is possible to obtain an image forming apparatus having a simple structure, easy manufacture, low cost, TT and II types, and high display quality.

[Brief explanation of the drawing]

FIG. 1 is a structural diagram of an embodiment of the present invention, FIG. 2 is a longitudinal sectional view thereof, and FIG. 3 is a diagram of the principle of an electron guide electrode. ■ = Vacuum vessel, 2: Cando (electron emission means), 3: Partition wall, 4: Channel, 5: Flat electrode (electron guide part), 6: Perforated electrode (electron guide part), 7: Lateral control electrode ( (extraction mechanism), 8: longitudinal control electrode (extractor S), 9: phosphor, 10, +1: secondary electron emitting material, 12: il electrode, 13: second electrode, 100: display device.

Claims (1)

[Claims] (1) A display part in which a vacuum container is formed between a rectangular display board and a back plate parallel to the display board, an electron emitting means disposed on one side of the display part, and It consists of a plurality of parallel partition walls that partition the interior, and a flat plate electrode and a perforated electrode that are arranged in a part of the channel formed by the partition walls and are parallel to the longitudinal direction of the channel. an electron guide section for guiding electrons, an extraction mechanism for extracting electrons from the electronic guide section, and installed inside the display board,
An image forming device comprising a phosphor that emits light by projection of electrons extracted from an opening of a perforated electrode when passing through the electron guide section, and a secondary phosphor on the surface of the electrode forming the electron guide section. An image forming apparatus characterized in that an electron emitting substance is attached.