Image display apparatus

Details Image display apparatus Image display apparatus

1982-01-28

1984-05-29

Chin, Tommy P.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358 56, 358242, 313422, 315366, H04N 912, H04N 566, H01J 3110

Patent

active

044518528

ABSTRACT:
A video image display apparatus of the flat tube and multi line cathode type of the present invention includes a phosphor screen, and a predetermined number (e.g. 15) of line cathodes for in-turn emitting a predetermined number of horizontal rows of electron beams. Each row has a second predetermined number (e.g. 320) of rod shaped electron beams for together producing one horizontal line of image on the phosphor screen. A vertical deflection means is provided for vertical deflection of the electron beams in turn at one vertically divided segment corresponding to one of the horizontal rows by means of a vertical deflection signal, e.g. a step wave having a saw-tooth wave envelope. The envelope is adjusted so as to be expanded or compressed or level changed, thereby eliminating any undesirable black horizontal band on the screen due to non-uniformity of electrode construction. A uniform raster is thereby obtainable.

REFERENCES:
patent: 3720859 (1973-03-01), Hilden
patent: 3800186 (1974-03-01), Yamane
patent: 3992644 (1976-11-01), Chodil
patent: 4158210 (1979-06-01), Watanabe
patent: 4170771 (1979-10-01), Bly
patent: 4170772 (1979-10-01), Bly
patent: 4227117 (1980-10-01), Watanabe

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