JPH0430138B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an electrode configuration in an image display device equipped with an electron beam source.

Conventional configuration and its problems As shown in FIG. 2, the electrode configuration that has been tested in the past has a spacer 31 with a plate thickness of 0.1 mm.
Electrodes 3' and 5 are made of Fe-Ni-Cr alloy with a thickness of 0.1 to 0.2 mm and are formed with an array of electron flow holes that communicate with the electron flow holes of the spacer 31. , 6, 6', and 7 are arranged, and the spacer 31 and the electrodes 3', 5, 6, 6', and 7 are covered with a glass powder frit 30 having a thickness of 0.2 mm and serving as electrical insulation, except for the electron flow passage hole. It was joined by In such a configuration, especially the electrodes 3', 5, 6,
6', 7, spacer 7 and glass powder frit 30
Since the coefficients of thermal expansion of the glass powder frits are different and the thickness of the glass powder frit 30 is thicker than that of each electrode and spacer, a spacer is provided between each electrode, and after bonding with the glass powder frit, each electrode 3', 5 ，
There was a problem in that the electron flow passage holes 6, 6', and 7 were distorted in pitch and warped, and a predetermined trajectory of the electron beam could not be drawn.

OBJECTS OF THE INVENTION The present invention solves the above-mentioned drawbacks, and enables high-quality image display by aligning each electrode structure with high precision.

Structure of the Invention When configuring an electrode group, the present invention provides a spacer having an array of electron flow passage holes that communicates with the spacer, and an Fe-type spacer that has an array of electron flow passage holes communicating with the spacer.
An electrode made of Ni-Cr alloy is arranged, and the spacer and electrode are adhesively fixed with crystalline glass powder frit.
By applying crystalline glass powder frit to SUS430, the pitch shift and warpage of the electron flow passage hole of each electrode, which is caused by the difference in thermal expansion coefficient when the above spacer and each electrode group are joined with glass powder frit, is reduced. It has the unique effect of enabling high-quality image display.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows the basic configuration of an example of an image display element used in the image display device of the present invention.This display element is arranged in order from the rear to the front:
Back electrode 1, line cathode 2 as an electron beam source, vertical focusing electrodes 3, 3', vertical deflection electrode 4, electron beam flow control electrode 5, horizontal focusing electrodes 6, 6', horizontal deflection electrode 7, electron beam accelerating electrode 8 and a screen plate 9 are arranged, and these are housed in the evacuated interior of a flat glass bulb (not shown). FIG. 3 shows a cross section of one electrode unit of the electrode structure of the image display device according to an embodiment of the present invention. In Fig. 3, 3' is a vertical focusing electrode, 5 is an electron beam flow control electrode,
6, 6' are horizontal focusing electrodes, 7 is a horizontal deflection electrode, 3
2 is a glass powder frit that joins the spacer and each electrode, 33 is a metal core that makes up the spacer, and 34 is a glass powder frit that makes up the spacer.

The electrode structure constructed as described above is characterized in that the spacer is made of a composite material composed of the core bar 33 and the glass powder frit 34 as described above. The core metal 33 of this spacer is 0.1 to 0.2 mm.
Using SUS430 material, electron flow passage holes are formed in an array by etching, for example. Thereafter, a crystalline glass frit 34 is coated, for example, by printing, on selected areas excluding the holes through which the electron flow passes. The thickness of the core metal and the glass powder frit at this time is determined by the materials, shapes, electrode spacing, etc. of the electrodes 3', 5, 6, 6', and 7. In this case, the material of the electrode is Fe
-Ni-Cr alloy with a plate thickness of 0.1 to 0.2 mm. The thickness of the crystalline glass frit 34 is equal to the thermal expansion coefficient of the electrode 110.
×10 ^-7 /℃． 100~ to get as close to cm as possible
The thickness is selected to be 150μm. By doing this, the thermal expansion coefficient of the spacer after printing and coating the crystalline glass frit on the core metal and firing the crystalline glass frit is approximately 109×10 ^-7 /°C. cm. The number of spacers corresponding to the electrode spacing shown in FIG. 3 is prepared. Furthermore, each electrode and spacer are made of glass powder frit 32 to secure the spacing between each electrode and ensure insulation and to ensure communication between each electrode and each electron flow passage hole.
It is joined and fixed at. This thickness is set to 50 μm or less to reduce pitch deviation and warpage of the electron flow passage hole of each electrode.

Effects of the Invention According to this embodiment as described above, an electrode having an array of electron flow passage holes communicating with the elongation adjustment composite insulating spacer is disposed on the elongation adjusting composite insulating spacer having an array of electron flow passage holes. By creating a structure in which the spacer and electrode are bonded and fixed with a thin film of inorganic adhesive, in this case glass powder frit, it is possible to match the coefficient of thermal expansion of the spacer to the coefficient of thermal expansion of each electrode. The glass powder frit layer that joins each electrode and spacer can be made into a thin film, which reduces the pitch deviation and warpage of the electron flow passage hole of each electrode when forming an electrode group, and provides high quality. It is possible to display images, and its practical effects are great.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view showing the basic configuration of an image display element used in an image display device, FIG. 2 is a sectional view of a conventional electrode group, and FIG. 3 is a sectional view of an electrode group in an embodiment of the present invention. It is. 3, 3'... Vertical focusing electrode, 5... Electron beam flow control electrode, 6, 6'... Horizontal focusing electrode, 7...
Horizontal deflection electrode, 30...Glass powder frit, 3
1...Spacer, 32...Glass powder frit,
33...Core metal, 34...Crystalline glass powder frit.

Claims (1)

[Claims] 1. A plurality of linear hot cathodes, partition means for partitioning the linear hot cathodes from each other, and a plurality of through holes in the axial direction of the hot cathodes corresponding to each of the hot cathodes for extracting an electron beam. electrode means for deflecting the electron beam; electron beam control electrode means for deflecting the electron beam; an electrode means for accelerating the electron beam, and a display means coated with a phosphor that emits light upon collision of the electron beam, and is housed in a glass container with at least a display surface transparent. The electromagnetic group includes an elongation-adjusting composite insulating spacer having an array of electron flow passage holes, and an electrode having an array of electron flow passage holes that communicates with the through hole, and an electrode having an array of electron flow passage holes that communicates with the expansion adjustment spacer. An image display device characterized in that SUS430 is coated with crystalline glass powder frit, the electrode is made of Fe-Ni-Cr alloy, and the spacer and electrode are adhesively fixed with a thin film of crystalline glass powder frit. .