Improved color display system and cathode ray tube

Improved color display system and cathode ray tube

  • CN 87,106,708 A
  • Filed: 09/29/1987
  • Published: 05/11/1988
  • Est. Priority Date: 09/29/1986
  • Status: Abandoned Application
First Claim
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1. , a color display system comprises a cathode ray tube with electron gun, this electron gun produces three electron beams and it is directed on the phosphor screen along the path to phosphor screen, this rifle comprises the electrode that constitutes electron beam forming area and is used for forming the electrode of main focusing lens, said system also comprises an automatic converged yoke, and this yoke produces an astigmatism magnetic deflecting field.It is characterized in that it includes:

  • In said electron gun in order in each electron beam path, between electron beam forming area and main focusing lens, to form the electrode of a multipole lens, wherein each multipole lens all through orientation to provide correction to the associated electrical bundle, so that to the effect of small part compensation astigmatism magnetic deflecting field to associated electrical Shu Fasheng, wherein said electrode in order to the formation multipole lens comprises first multi-polar electrode lens and second multi-polar electrode lens, said second multi-polar electrode lens is the part in order to one of electrode that forms main focusing lens, and said first multi-polar electrode lens is between second multi-polar electrode lens and electron beam forming area territory, and adjacent with second multi-polar electrode lens.One fixed-focus voltage is added in the device of said second multi-polar electrode lens,One dynamic voltage signal is added in device on said first multi-polar electrode lens, and this dynamic voltage signal is relevant with the deflection of all electron beams,Each multipole lens that closely changes with the change in voltage of said dynamic voltage signal apart from main focusing lens to the intensity that is enough to make main focusing lens.

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