JPS5882449A - Cathode-ray tube - Google Patents

Abstract

PURPOSE:To obtain a cathode-ray tube with a high reliability by enabling accurate conduction between a metal back layer, which is formed on a panel glass by vapor-deposition, and a graphite layer, which is applied to a funnel glass, by fixing a conduction spring to the panel glass. CONSTITUTION:A graphite layer 6 is applied to a conduction spring 3, which is fixed to a panel glass 1 by means of a frit glass 4, so as to make the spring 3 to conduct with a metal back layer 2. In the sectional illustration, which indicates that a panel glass 1 and a funnel glass 7 are fused and fixed together by means of a non-conductive adhesive such as a frit glass 9, the conduction spring 3 conducts with a graphite layer 8 applied to the inner wall of the funnel glass 7, as well as with the metal back layer 2. Owing to the above constitution, voltage is smoothly supplied from an anode button 10 to a phosphor layer 5.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a conductive structure between a metal back layer distilled on the inner surface of a panel glass of a cathode ray tube and a graphite layer coated on the inner surface of a funnel glass.

The operation of a cathode ray tube is achieved by controlling and accelerating thermionic electrons emitted from the cathode of an electron gun in a vacuum glass pulp using a grid, and hitting the phosphor layer coated on the inner surface of the panel glass to achieve the desired reflection. This is something that will give you an idea.

Conventional 1. Voltage is supplied to the phosphor layer in a cathode ray tube through a metal terminal called an anode button embedded in glass or pulp. The anode button is electrically connected to a graphite layer within the glass pulp, and an aluminum film called a metal back layer is formed on the graphite layer and the phosphor layer by vapor deposition or the like. This establishes conduction between the graphite layer and the metal back layer, and provides a structure in which voltage is supplied to the phosphor layer via the seven-node button.

This structure is effective when the screen is a normal monochrome sphere, but it is effective when the screen is a regular monochrome sphere,
)'hosphor Tababbreviation 8. )', T), for example, when displaying 3yA colors of red, blue, and green divided into three strips, it is difficult to use a normal phosphor coating method. Therefore, a method was devised in which the panel glass was divided into two parts: panel glass and 77-thickness glass, and a layer of fireflies was applied in a band shape to the panel glass by the mixed light method.

Voltage is supplied to the phosphor layer at (8)" and T using a panel glass with a metal back layer applied in advance and a non-conductive adhesive such as funnel glass T-7 glass coated with graphite. Conductivity is established by sealing and fixing the funnel glass, or by inserting a thin brush impregnated with graphite into the neck of the funnel glass and applying graphite between the gap between the metal back layer and the graphite layer.However, This method had the drawbacks that moisture in the graphite penetrated into the metal back layer, causing insulation defects, and that the graphite was applied to the phosphor layer when the brush was operated for a full time.

The purpose of this invention is 8. )', T to provide a method for accurately establishing electrical conduction between a metal back layer deposited on a panel glass and graphite coated on a funnel glass.

Next, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 shows a panel glass 1. FIG. A metal back layer 2 (metal back layer 2) is deposited on the panel glass 1.

Although not shown, a phosphor layer is coated under the metal back layer 2 by a non-lighting method. FIG. 2 shows a conduction spring 3 that establishes conduction between the metal back layer deposited on the inner surface of the panel glass and the graphite layer coated on the inner surface of the 7-channel glass. Figure 3 shows a second panel glass 1 in Figure 1.
It is a cross-sectional view of the electrically conductive spring 3 shown in the figure fixed with a non-conductive adhesive such as 7-lit glass 4. In Figure 3,
A phosphor layer 5 is coated under the metal back layer 2 by a non-lighting method. Figure 4 is an overhead view of Figure 3. Fourth
In the figure, a graphite layer 6 is coated on a conductive spring 3 1 fixed to the panel glass 1 by a frit glass 4 in order to establish conduction with the metal back layer 2. FIG. 5 is a cross-sectional view of the panel glass 1 and the seven-hole glass 7 sealed and fixed with a non-conductive adhesive such as frit glass 9. In FIG. 5, the conduction spring 3 is shown to be electrically conductive with the graphite layer 8 coated on the inner surface of the 77-thickness glass, and the conduction spring 3 and the metal back layer 2 are electrically connected, so that cyano - Voltage is smoothly supplied from the topotan 10 to the phosphor layer 5. As explained above, this invention uses a metal back layer and funnel glass deposited on the panel glass by using a conduction spring. It is possible to accurately establish conduction with the graphite layer coated on the substrate, and it is possible to provide a highly reliable cathode ray tube.

[Brief explanation of the drawing]

Figure 1 is a plan view of the panel glass, Figure 2 is a perspective view of the conduction spring, Figure 3 is a sectional view of the conduction spring fixed to the panel glass, and Figure 4 is an overhead view of Figure 3. 5-
is a sectional view showing the panel glass and funnel glass sealed and identified. 1...Panel glass, 2...Metal back layer, 3...Continuity spring, 4...
...7 lit glass, 5...phosphor layer, 6...
...Graphite layer, 7...Funnel glass, 8
...Graphite layer, 9...7 lit glass,
10... Anode button. - 1 dregs, ) 1Σ2=1 #2 l Leather 4 Figure S Figure 1 24',

Claims (1)

[Claims] In a cathode ray tube in which the connection between the metal back layer on the inner surface of the panel and the interior graphite layer on the inner surface of the funnel is made conductive via a conductive subring, and the panel and 77 channel are sealed and fixed, the conductive spring is placed on the panel side. A cathode ray tube.