Image display apparatus

Details Image display apparatus Image display apparatus

1982-01-28

1984-05-15

Chin, Tommy P.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358 56, 315366, 313422, H04N 566, H04N 912, H04J 3120

Patent

active

044491484

ABSTRACT:
A flat type display apparatus includes an electron beam source for emitting a row of a large number of electron beams, and a phosphor screen having a phosphor layer which emits light in response to impingement by the electron beams. An electron beam convergence means is provided and an electrostatic deflection means for deflecting the electron beams prior to impingement on the phosphor screen. An electron beam controlling means has a number of electron beam controlling electrodes for individually controlling the current of the electron beams to control light emissions from the phosphor screen. A pulse width modulation circuit feeds electron control signals of a constant voltage and pulse-width modulated by video signal information to be displayed. Light emission control without changing converging conditions of electrostatic lenses is thus obtained so that a good linearity between the video signals and the electron beams is obtained.

REFERENCES:
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

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