Cathode-ray tube

Abstract

Disclosed is a cathode ray tube with an electron gun capable of improving a resolution of an image by preventing electron beams from striking electrodes and efficiently controlling a spot size that is susceptible to a change in current capacity.

Description

technical field [0001] The present invention relates to a cathode ray tube, and more particularly, to a cathode ray tube having an electron gun capable of preventing electron beams from bombarding electrodes and effectively controlling the size of a spot susceptible to changes in current capacity, thereby enabling improved image resolution. Background technique [0002] FIG. 1 is an illustration of a conventional conventional cathode ray tube. [0003] As shown in Figure 1, this cathode ray tube comprises panel 1, and fluorescent screen 13 is arranged on its inner surface, is coated with R, G, B phosphor (or phosphorus) on the screen; In order to keep the vacuum state in the tube; the electron gun is installed in the neck 15 of the glass bulb 12 and is used to emit electron beams; the deflection yoke 11 is used to deflect the electron beams emitted by the electron beam 16; and the shadow mask 14 has the color selection function of the electron beams deflected by the deflect...

AI Technical Summary

Problems solved by technology

[0026] However, the above efforts only bring about the problem of vertically elongating the spot size in the center of the screen due to divergence

[0027] In other respects, due to the great development of Internet technology, more and more people now watch moving images on computer monitors, so electron guns with high brightness for computer monitors are introduced because monitor cathode ray tubes cannot Provides a sufficiently realistic and bright picture like a TV cathode ray tube

[0028] But this electron gun consumes 3 times more current than a normal electron gun

Worse is that as the current draw increases, the light spot becomes larger across the screen, and due to the larger light spot, the resolution decreases

[0029] In short, due to more current applied to the electron gun, although grooves are formed on the second electrode to control the electron beam, the screen resolution is still low

[0030] In addition, as shown in Figure 7, the increase in current capacity increases the diameter of the electron beam (D'>D), which will cause the electron beam to bombard the electrode, thereby destroying the circuit in it

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