System for increasing the brightness of a multibeam dot-pattern

Details System for increasing the brightness of a multibeam dot-pattern System for increasing the brightness of a multibeam dot-pattern

1986-04-21

1987-12-15

Curtis, Marshall M.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340720, G09G 100

Patent

active

047136570

ABSTRACT:
In order to increase the light intensity and legibility of the characters displayed on the screen of a cathode-ray tube, all dots of the same vertical line of the character or even all dots of this character are simultaneously excited. This is done by means of a multiple cathode while the line is scanned, so that excitation of the dots is repeated a predetermined number of times with short time intervals. When all the dots of the character are simultaneously excited, a shift of the picture transmitted by the multiple cathode is carried out at the same time in synchronism with and in opposite direction to the line scan, to compensate for the formation of stripes in the displayed picture which would otherwise be produced by the scan.

REFERENCES:
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F. H. Dill, Solid-State Multiple-Electron Gun for Improved Display Cathode Ray Tube, Nov. 1978, pp. 2562-2564, IBM Technical Disclosure Bulletin, vol. 21, No. 6.

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