Circuits for controlling dimensions, shape or centering of picture on screen

Introduced: September 1968

Full Title

Full titles differ between systems:

IPC:

Scanning details of television systems; Combination thereof with generation of supply voltages > by means not exclusively optical-mechanical > by deflecting electron beam in cathode-ray tube > Circuits for controlling dimensions, shape or centering of picture on screen

CPC:

Scanning details of television systems; Combination thereof with generation of supply voltages > by means not exclusively optical-mechanical (H04N3/36 takes precedence) > by deflecting electron beam in cathode-ray tube > Circuits for controlling dimensions, shape or centering of picture on screen

IPC and CPC are identically structured here. All 3 subcodes exist in both systems.

1 shared codes have differing titles between IPC and CPC.

IPC defines codes here since 1985.

Child Classifications

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H04N 3/223 Controlling dimensions (by maintaining the cathode-ray tube high voltage constant H04N3/185) since 1985 IPC+CPC Available in IPC and CPC
H04N 3/227 Centering since 1985 IPC+CPC Available in IPC and CPC
H04N 3/23 Distortion correction, e.g. for pincushion distortion correction, S-correction since 1985 IPC+CPC Available in IPC and CPC