Color image display apparatus

Claim 1

An image display apparaus comprising: a phosphor screen having a phosphor layer for emitting light at impingement by electron beam, said phosphor screen having a predetermined number of segments formed by dividing in vertical direction, and also having another predetermined number of subsegment formed by dividing in horizontal direction, each subsegment having three primary color phosphor regions disposed in horizontal direction, an electron beam source for in-turn emitting a predetermined number of horizontal rows of electron beams, for producing one horizontal line of image on said phosphor screen, a vertical deflection means for vertical deflections of said electron beams of said horizontal rows in a manner that electron beams of a horizontal row impinging said phosphor screen at one of said vertically divided segment corresponding to one of said horizontal row is simultaneously driven vertically, thereby vertically moving one of said horizontal line in said vertically divided segment, a horizontal deflection means for horizontal deflections of said electron beams of said horizontal rows thereby sequentially to impinge selected color phosphors to display a selected color images sequentially in said segment, a control means for controlling intensities of said electron beams responding to control electric signals applied thereto, and a flat shaped vacuum enclosure containing the above-mentioned components therein, one end face thereof forming a screen face in which the color phosphor screen is provided, characterized by further comprising a control signal producing means for producing said control signals by decoding color picture signals thereby producing primary color signals, and sampling said primary color signal by a set of three sampling pulses for three primary colors of light, which three sampling pulses are issued in a time sequence in the color order corresponding to that of displaying, and within a time period corresponding to electron beam scanning for one horizontal picture element, and sampled chrominance signals are applied in said time sequence to said control means.