US PATENT SUBCLASS 347 / 196
.~.~.~ Using pulse width modulation

Current as of: June, 1999
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347 /   HD   INCREMENTAL PRINTING OF SYMBOLIC INFORMATION

171  DF  THERMAL MARKING APPARATUS OR PROCESSES {20}
188  DF  .~ Density control {7}
195  DF  .~.~ By history of recording elements {1}
196.~.~.~ Using pulse width modulation

DEFINITION

Classification: 347/196

Using pulse width modulation:

(under subclass 195) Subject matter wherein the amount of heating energy supplied to the particular recording element is controlled by varying time duration of activated pulses.