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Method of extending the life of a cathode ray tube

  • US 4,336,478 A
  • Filed: 04/21/1980
  • Issued: 06/22/1982
  • Est. Priority Date: 04/21/1980
  • Status: Expired due to Term
First Claim
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1. A method of greatly extending the life of a cathode ray tube which includes a cathode ray tube screen having a centralized screen portion in the neighborhood of an axis of rotation about which said cathode ray tube screen may be rotated, and a plurality of noncentralized screen portions, comprising the steps of:

  • a. generating a luminous image upon a first noncentralized portion of said screen over a first extended time period while maintaining said cathode ray tube screen stationary;

    b. thereafter rotating said cathode ray tube screen about said axis of rotation through a given angle after the termination of said first extended time period during which said luminous image is produced in said first outer portion of said screen;

    c. thereafter generating said luminous image in a second noncentralized portion of said screen over a second extended time period while maintaining said cathode ray tube screen stationary; and

    ,d. thereafter again rotating said cathode ray tube screen about said axis of rotation through a given angle for enabling generation of a luminous image in a third noncentralized portion of said cathode ray tube screen during a third extended time period while said screen is maintained stationary.

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