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Color cathode-ray tube

A cathode ray tube and color technology, applied in the direction of cathode ray tube/electron beam tube, discharge tube, electrode device and related components, etc., can solve problems such as difficult focusing characteristics, inability to form electrostatic quadrupole lens, spatial shape distortion, etc.

Inactive Publication Date: 2006-08-09
HITACHI DISPLAYS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, as described above, when the displacement occurs, the shape of the space through which the electron beam passes surrounded by the correction plate of the other focusing electrode or the electrode itself will be distorted, and the desired electrostatic quadrupole lens cannot be formed.
And, accompanying this, it is difficult to obtain the desired focus characteristics in the entire area on the phosphor screen, and it becomes one of the problems to ensure the distance between the correction plates within a predetermined size.

Method used

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  • Color cathode-ray tube
  • Color cathode-ray tube
  • Color cathode-ray tube

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Embodiment Construction

[0041] Hereinafter, embodiments of the present invention will be described in detail using drawings of the embodiments. figure 1 It is a side sectional view of main parts illustrating the specific structure of an in-line electron gun as an embodiment of the color cathode ray tube of the present invention, figure 2 When looking at the electron gun from a direction at right angles to the direction of the in-line arrangement figure 1 side view. in addition, image 3 It is a schematic diagram showing an example of a combination of electrodes forming an electrostatic quadrupole lens of an in-line electron gun for a color cathode ray tube according to the present invention. exist figure 1 and figure 2 Here, K is a cathode, G1 is a first electrode (control electrode), and G2 is a second electrode (accelerating electrode), and these cathode K to accelerating electrode G2 form an electron beam generating part. G3 is a third electrode, and a prefocus lens is formed by the third e...

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Abstract

The invention provides a color cathode ray tube capable of exhibiting excellent focusing characteristics over an entire screen by suppressing the deformation and the displacement of the planar correction electrode plates which form the electrostatic quadruple lens. Out of focusing electrodes which face each other in an opposed manner and constitute an electrostatic quadruple lens, one focusing electrode includes planar correction electrode plates which extend parallel to a tube axis while sandwiching electron beams from above and below. Here, the correction electrode plates include a reinforcing mechanism for suppressing the deformation or the displacement of the planar correction electrode plates.

Description

technical field [0001] The present invention relates to a cathode ray tube, particularly a color cathode ray tube having an electron gun having excellent electrostatic quadrupole lens characteristics. Background technique [0002] A cathode ray tube used in monitor tubes of television kinescopes and information terminals, and other display tubes, is a phosphor screen (hereinafter, simply referred to as a screen) on which phosphors are formed by electron beams emitted from an electron gun. Up, in the horizontal and vertical directions to scan to form the required image. For the electron guns used in various color cathode ray tubes, in order to obtain good focusing characteristics (hereinafter also referred to as focusing characteristics) in the entire area of ​​the phosphor screen, the emitted electron beams must be landed on the phosphor screen according to their deflection angles. Electron beam spot shape control. [0003] In recent years, display monitors and television ...

Claims

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Application Information

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IPC IPC(8): H01J29/48
CPCH01J29/488H01J2229/4841
Inventor 小诸英正渡边健一野口一成内田刚白井正司
Owner HITACHI DISPLAYS