Flat configuration color CRT display apparatus with scanning correction for component positioning error

摘要

An image display apparatus includes a flat configuration CRT which is provided with a second set of horizontal deflection electrodes (7′) in addition to the main horizontal deflection electrodes (7). A sawtooth waveform correction deflection voltage is applied to the second electrodes such as to slow the rate of electron beam (11) scanning each time a portion of a fluorescent layer pattern (10a) of the screen is scanned, thereby increasing display brightness, while in addition the correction deflection voltage and the electron beam modulation signals are phase shifted by a mutually identical amount once in each scan line such as to compensate for a position deviation between the main horizontal deflection electrodes and the fluorescent layer pattern.