JPS62150637A - Vacuum container for flat matrix type crt - Google Patents

Abstract

PURPOSE:To improve the counteraction against a shearing stress without increasing the thickness of a face glass and to realize a light weight, by furnishing a cutting at either the face glass or a spacer glass, and gearing and fixing either the spacer glass or the face glass to be cutting. CONSTITUTION:At the connection of a face glass 8 and a spacer glass 5, the face glass 8 is connected in surface-contacting to the end surface 5a of the opening, and to the inner surface 5c of the opening square to the end surface 5a, of the spacer glass 5. Therefore, if the face glass 8 is going to bend, the load is supported strongly by the inner surface 5c of the opening of the spacer glass 5 at the connection owing to the atmospheric pressure, increasing the counteraction of the face glass 8 against the shearing stress, so that the thickness of the face glass can be reduced. Consequently, vertical and lateral visual angles can be increased as well as the light weight of the lighting elements is realized. Furthermore, the positioning of the face glass 8 to the spacer glass 5 is made easier.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to flat matrix CRTs, particularly to improvements in the structure of vacuum containers made of glass material having a plurality of pixels arranged in a matrix on the inner surface.

[Conventional technology]

FIG. 2 is a perspective view showing the overall structure of a conventional flat matrix CRT, and FIG. 3 is a sectional view showing an outline of a vacuum container located on the front side thereof. In the figure, (1) is a flat matrix CRT, (2) is its vacuum container,
Luminous bodies with three colors of red, blue, and green (3a), (3b)
, (3c) are attached to the inner surface of the flat face glass (4), and the peripheral edge of the inner surface of the face glass (4) (
The opening end face (5a) is hermetically bonded to 4a) with low melting point glass to form the light emitting body (35k).

Box-shaped spacer glass (6) covering (3b) and (3c)
It is composed of. Electrodes (not shown) are printed or built into the bottom (5b) of the spacer glass (5) so that they can be electrically connected from the outside via lead wires. (6) is the light emitting body (3a), (3
b).

(3C) This is a socket pin that supplies voltage to cause the light to emit light.

[Problem that the invention seeks to solve]

As described above, the vacuum container of the conventional flat matrix CRT has the problem that the face glass (4) and the spacer glass (5) are abutted and joined in one plane. There is a risk that the glass (4) may be bent by atmospheric pressure and the bonded area may peel off. Conventionally, this problem was solved by making the face glass (4) thicker than necessary to increase the shear stress at the bonded area. Solved it my friend.

However, increasing the thickness of the face glass (4) not only increases the weight of the writing element but also narrows the viewing angle in the vertical and horizontal directions.

In view of the above points, it is an object of the present invention to provide a vacuum container for a flat matrix CRT that can increase the resistance to shear stress without increasing the thickness of the face glass and can be made lighter in weight.

[The tth way to solve the problem]

The flat matrix CRT vacuum container of the present invention has a notch provided in either the face glass or the spacer glass, and the spacer glass or the face glass is fitted and secured to the notch.

[Effect]

In the present invention, the joint between the face glass and the spacer glass contacts at a plurality of surfaces having different angles, and the shear force load due to atmospheric pressure is absorbed by the shear stress that is firmly supported by any of the plurality of surfaces. The yield strength of the Kahe face glass has increased, making it possible to reduce the thickness of the face glass.

〔Example〕

Hereinafter, the present invention will be described with reference to an embodiment shown in FIG. 1, in which parts corresponding to conventional ones are denoted by the same reference numerals. In the figure, (7) shows a vacuum container according to the present invention, and its face glass (8) is set to have approximately the same width as the thickness of the spacer glass (5) over the entire peripheral edge thereof. A notch (8a) is formed, and a step (8b) of this notch (8a) is formed.
) can be guided and fitted into the opening inner surface (5c) of the spacer glass (6).

In addition, the face glass (8) and the spacer glass (6)
) is hermetically sealed and bonded together with low melting point glass, as in the past. Since the configuration other than the above is the same as the conventional one, the explanation thereof will be omitted.

Flat matrix C of the present invention configured as described above
In the RT vacuum container, the face glass (8) is connected to the spacer glass (6) at the joint between the face glass (8)
The spacer glass (6) tries to bend the face glass (8) because it is bonded in surface contact with the two surfaces of the opening end surface (5a) and the opening inner surface (5c) perpendicular thereto. The load due to atmospheric pressure is firmly supported by the inner surface (5c) of the opening of the spacer glass (6) at the joint, increasing the resistance of the face glass (8) to shear stress and reducing the glass thickness. Can be made thinner. This makes it possible to reduce the weight of the lighting element, increase the vertical and horizontal viewing angles, and further facilitate the positioning of the face glass (8) with respect to the spacer glass (5).

In the above embodiment, a notch (8a) is formed on the face glass (8) side, and the stepped part (8b) is fitted into the inner surface (5C) of the opening of the spacer glass (δ). For example, spacer glass (5)
A notch may be provided in the side opening end surface (5a), and the entire face glass (8) may be fitted into this notch. Furthermore, it is not necessary to provide the notches all the way around the joint; for example, cutouts of a predetermined length may be provided at multiple locations on the face glass (8) side, and a plurality of corresponding protrusions may be provided on the spacer glass (6) side. may be formed. Furthermore, a groove having a U-shaped cross section may be formed as a notch on the face glass (8) side, and the opening end surface (5a) i of the spacer glass (5) may be fitted into this groove.

〔Effect of the invention〕

As described above, according to the present invention, a cutout is provided in either the face glass or the spacer glass, and the spacer glass or the face glass is fitted and secured to the cutout, so that the joints have different angles. Since contact is possible on multiple surfaces, the shear force load due to atmospheric pressure is firmly supported by any one of these surfaces, making it possible to significantly increase the resistance of the face glass to shear stress, and reducing the thickness of the face glass. can be made thinner,
This has the effect of reducing the weight of the lighting element and increasing the viewing angle.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view schematically showing an embodiment of a vacuum container of a flat matrix CRT according to the present invention, FIG. 2 is a perspective view showing the overall configuration of a conventional flat matrix CRT, and FIG. FIG. 1 is a diagram corresponding to FIG. 1 showing the main parts of the device. (3a), (3b)-(3C)... Luminous body (δ) ms Spacer glass (γ)... Vacuum container (8)... Face glass (
8a)...Notch portion In each figure, the same reference numerals indicate the same or corresponding parts.

Claims (2)

[Claims] (1) In a flat matrix CRT equipped with a vacuum container consisting of a face glass with a plurality of light emitters attached inside and a box-shaped spacer glass that is integrally formed with the face glass and covers the light emitters, the vacuum The container is
1. A vacuum container for a flat matrix CRT, characterized in that it is constructed by providing a notch in either a face glass or a spacer glass, and fitting and fixing the spacer glass or the face glass into the notch. (2) A vacuum container for a flat matrix CRT according to claim 1, wherein a fitting portion between the face glass and the spacer glass is hermetically bonded with a low melting point glass.