US PATENT SUBCLASS 315 / 370
.~.~ With ray deflection distortion correction or reduction

Current as of: June, 1999
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315 /   HD   ELECTRIC LAMP AND DISCHARGE DEVICES: SYSTEMS

1  DF  CATHODE RAY TUBE CIRCUITS {11}
364  DF  .~ Cathode-ray deflections circuits {16}
370.~.~ With ray deflection distortion correction or reduction {1}
371  DF  .~.~.~> By modulation of deflection waveform

DEFINITION

Classification: 315/370

(under subclass 364) Subject matter wherein the cathode-ray tube has a cathode-ray beam source and (1) the deflection means is placed in a certain manner or of a configuration to correct or improve the cathode-ray beam pattern caused by the energized deflection means acting upon the beam or (2) there is an electrical element or an electrical network connected to the electrical circuit or the deflection means to correct or diminish the distortion of the beam pattern caused by the energized electrical circuit, deflection means, or the cathode-ray tube.

(1) Note. Included are television circuits which include a horizontal or vertical deflection circuit whose deflection waveform is modified in parabolic fashion by another waveform including the deflection waveform of the other horizontal or vertical circuit to correct for pin cushion, barrel or keystone type distortions of the cathode-ray beam pattern.

SEE OR SEARCH THIS CLASS, SUBCLASS:

368, for dynamic color convergence circuits to correct the focus of the cathode-ray beam dependent upon the vertical or horizontal deflection circuits.

369, for the correction of the vertical or horizontal deflection circuit dependent upon the cathode-ray beam striking a target.

382, for the combination of a deflection circuit to deflect the cathode-rays of a cathode-ray tube and a circuit connected to a focus electrode to control the cathode-ray beam in its movement to the target of the cathode-ray tube. 387, for linearity control circuits utilizing feedback networks in the cathode-ray tube deflection circuits.

401, for distortion correction circuits utilizing a saturable magnetic device in the deflection circuit.

SEE OR SEARCH CLASS

327, Miscellaneous Active Electrical Nonlinear Devices, Circuits, and Systems,

133, for miscellaneous sawtooth generation with distortion regulation and subclass 317 for miscellaneous amplitude controlled distortion compensation.

330, Amplifiers,

149, for amplifiers wherein a hum noise or distortion bucking signal is introduced into the amplifier signal channel.

348, Television,

251, and 615 for shading and black spot correction circuitry.