US PATENT SUBCLASS 315 / 368.11
.~.~ Including color convergence control

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


315 /   HD   ELECTRIC LAMP AND DISCHARGE DEVICES: SYSTEMS

1  DF  CATHODE RAY TUBE CIRCUITS {11}
364  DF  .~ Cathode-ray deflections circuits {16}
368.11.~.~ Including color convergence control {8}
368.12  DF  .~.~.~> Including specified signal storage (e.g., memory, register, etc.) {1}
368.15  DF  .~.~.~> Including electrostatic element (e.g., electrode, lens, etc.) {1}
368.17  DF  .~.~.~> Including signal delay circuitry
368.18  DF  .~.~.~> Including specified waveform generating circuitry {2}
368.24  DF  .~.~.~> Static convergence feature
368.25  DF  .~.~.~> Including core or winding structure {1}
368.27  DF  .~.~.~> Including particular magnetic field distribution
368.28  DF  .~.~.~> Including plural cores or coils

DEFINITION

Classification: 315/368.11

Including color convergence control:

(under subclass 364) Subject matter which includes at least two electron beam deflection elements connected in a circuit which generates a time varying signal to permit the focusing and scanning of plural electron beams in the envelope of a cathode-ray tube in one or two directions at each and every point on a screen of the cathode-ray tube.

(1) Note. The deflection elements may be either electrostatic or electromagnetic, and are usually additional to a deflection arrangement providing for scanning by the electron beam.

(2) Note. Included in this subclass are combinations which do not include either a vertical or horizontal deflection device, but only the claimed statement that the cathode ray beam deflection circuit is a source for a dynamic convergence circuit.

(3) Note. Included in this subclass are claimed subcombinations which state a waveform source energizes the winding of a convergence electro-magnet.

(4) Note. Included in this subclass is subject matter which may have only a claimed statement that the convergence circuit is energized from line or frame frequency components.

SEE OR SEARCH THIS CLASS, SUBCLASS:

11.5, for color convergence control circuitry for a cathode-ray tube, having photodetector control. SEE OR SEARCH CLASS

313, Electric Lamp and Discharge Devices,

412, for cathode-ray tube structure for plural beam convergence, absent circuitry.

348, Television,

807, for a color television receiver having a cathode-ray tube.

345, Computer Graphics Processing, Operator Interface Processing, and Selective Visual Display Systems,

418+, for the application of a CRT in control of data presentation.