Facsimile and static presentation processing – Static presentation processing – Attribute control
Patent
1980-07-21
1981-12-15
Richardson, Robert L.
Facsimile and static presentation processing
Static presentation processing
Attribute control
358 60, 358 66, 358 67, H04N 916, H04N 931
Patent
active
043062482
ABSTRACT:
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. Taking advantage of the above features, a multi-color display apparatus is disclosed which employs dual excitation of a planar target screen to provide high resolution information in monochrome together with a wide range of colors for enhancement of contrast and for improved information discrimination. Beam-indexing means are used to maintain the registration between the monochrome and color components of the information being displayed.
REFERENCES:
patent: 3943279 (1976-03-01), Austefjord
patent: 3967315 (1976-06-01), Goodman
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