Improved cathode ray tube

Abstract

A cathode ray tube comprises a panel of which outer surface is substantially flat and inner surface has a designated radius of curvature, a shadow mask coupled to the panel, the shadow mask having electron beam passing holes, and a reinforcing band mounted on the outer surface of the panel, wherein a diagonal size of an effective surface of the panel is in the range of 397-463 mm, and a thickness of a diagonal end of the effective surface of the panel is in the range of 20-23 mm.

Description

technical field [0001] The present invention relates generally to a cathode ray tube, and more particularly to a cathode ray tube having an improved panel structure whereby damage caused by heat treatment processes can be minimized and the overall weight and production of the panel can be reduced cost. Background technique [0002] figure 1 The structure of a prior art cathode ray tube is shown. [0003] refer to figure 1 , the cathode ray tube includes a panel 1 with a fluorescent film 4 formed on the inner surface, a funnel 2 connected to the panel 1, a shadow mask 3 with a color selection function arranged at a specified distance from the fluorescent film 4, and a support for supporting A shadow mask frame 5 of the shadow mask 3 , an electron gun 8 for emitting electron beams 11 and a deflection coil 9 for deflecting the electron beams 11 are installed on the neck 10 of the funnel 2 . [0004] In particular, the shadow mask frame 5 is combined with the panel 1 through...

AI Technical Summary

Problems solved by technology

[0013] refer to Figure 5 , unlike the panel 1a whose outer surface and inner surface respectively have a specific radius of curvature, the panel 1b whose outer surface is substantially flat and whose inner surface has a specific radius of curvature is from the seal edge line to the mold match line ) has a greater distance, is relatively thicker and heavier, and is therefore more expensive to produce

[0014] In addition, when the panel 1 becomes thicker, damage often occurs inside the furnace due to the difference in thermal conductivity, and the brightness also decreases

[0015] In an attempt to compensate for this reduction in brightness, some manufacturers have tried to increase the width of the phosphor, however, this just creates another problem, that is, in order to increase the width of the phosphor, it is necessary to reduce the (dichroic) black background resolution phosphor. width, but in this case the color purity will be reduced

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