Shadow mask frame of cathode ray tube

Abstract

In the shadow mask frame for a cathode ray tube made according to the present invention, by satisfying 0.80≤a / (Xd / 4)+b / (Yd / 4)+c / (Dd / 4)≤1.25, here, Xd is The length of the long side of the shadow mask frame, Yd is the length of its short side, Dd is the length of its diagonal, a is the height of the center of its long side, b is the height of the center of its short side, and c is its corner Higher height for easier assembly, improved microphony and drop characteristics, and reduced panel width for slimmer CRTs and reduced weight.

Description

technical field [0001] The present invention relates to a cathode ray tube, particularly a shadow mask frame of a cathode ray tube, which can improve howling characteristics and drop characteristics by adopting an optimally designed shape. Background technique [0002] Typically, a cathode ray tube consists of a vacuum vessel consisting of a face plate and a funnel. In a cathode ray tube, an electron beam emitted from an electron gun is deflected by a deflection yoke, passes through a plurality of electron beam passage holes formed in a shadow mask, and lands on a fluorescent surface formed on the inner surface of a panel, thereby passing through each fluorescent surface luminescent material that reveals an image. [0003] The cathode ray tube will be described with reference to the accompanying drawings. [0004] figure 1 is a schematic diagram of a common cathode ray tube. [0005] Such as figure 1 As shown, in a common cathode ray tube, a face plate 1 as a front glas...

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Problems solved by technology

[0016] However, if Figure 3B As shown, when the conventional shadow mask frame 9 is applied as it is to the panel 1 having the reduced skirt portion 4, since the edge between the end of the shadow mask frame 9 and the inner surface of the panel 1 is reduced , so there may be mutual conflict (interference), due to this conflict, the panel 1 may be scratched or damaged during the manufacturing process of the cathode ray tube

[0017] Therefore, in order to prevent the collision, the height of the edge portion 20 of the shadow mask frame 9 is reduced, and by the reduction of the height of the edge portion 20, since the area of ​​the bonding surface of the shadow mask 8 and the shadow mask frame 9 is reduced, the bonding force is reduced. , so the microphonic characteristics and drop characteristics of the shadow mask 8 may deteriorate

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