using cathode ray tubes

Full Title

Details of colour television systems > Picture reproducers > using cathode ray tubes

Classification Context

Section:

ELECTRICITY

Class:

ELECTRIC COMMUNICATION TECHNIQUE

Subclass:

PICTORIAL COMMUNICATION, e.g. TELEVISION

Child Classifications

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• H04N 9/18 using separate electron beams for the primary colour signals
• H04N 9/22 using the same beam for more than one primary colour information
• H04N 9/27 with variable depth of penetration of electron beam into the luminescent layer, e.g. penetrons
• H04N 9/28 Arrangements for convergence or focusing
• H04N 9/29 using demagnetisation or compensation of external magnetic fields