Energy-efficient beam-index displays with programmable power supplies

申请公布号：US4225880(A)

申请号：US19780961280

申请日期：1978.11.16

申请公布日期：1980.09.30

申请人：

GOODMAN, DAVID M.

发明人：GOODMAN, DAVID M.

分类号：H04N3/22;H04N9/24;H04N9/31;(IPC1-7):H04N9/22

主分类号：H04N3/22

摘要：Programmable power supplies are made responsive to beam-index and timing signals in order to automatically control the size and position of the display on a cathode ray tube. The high voltage power supply is also made programmable, responsive to video signal content, to reduce the energy stored in the high voltage circuits. Savings in energy consumption are also obtained by efficiently modulating the target screen of a beam-index type color cathode ray tube. Energy lost at the target screen is less than 10% compared to approximately 70% for a conventional color tube, an improvement factor of 7:1 or more.

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