US PATENT SUBCLASS 348 / 658
.~.~.~.~ Including optical sensor to observe display (e.g., CRT)

Current as of: June, 1999
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348 /   HD   TELEVISION

571  DF  IMAGE SIGNAL PROCESSING CIRCUITRY SPECIFIC TO TELEVISION {34}
655  DF  .~ Color balance or temperature (e.g., white balance) {1}
656  DF  .~.~ Receiver type {1}
657  DF  .~.~.~ Including feedback control {1}
658.~.~.~.~ Including optical sensor to observe display (e.g., CRT)

DEFINITION

Classification: 348/658

Including optical sensor to observe display (e.g., CRT):

(under subclass 657) Subject matter wherein the sensor detects the light output of the display.