automatic brightness control
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automatic brightness control[¦ȯd·ə¦mad·ik ′brīt·nəs kən‚trōl]
A circuit used in a television receiver to keep the average brightness of the reproduced image essentially constant. Abbreviated ABC. Also known as automatic background control.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.