Flat configuration color CRT display apparatus with scanning cor

Details Flat configuration color CRT display apparatus with scanning cor Flat configuration color CRT display apparatus with scanning cor

1990-05-18

1991-11-26

Blum, Theodore M.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Cathode-ray deflections circuits

313422, H01J 2970, H01J 2972

Patent

active

050685791

ABSTRACT:
An image display apparatus includes a flat configuration CRT which is provided with a second set of horizontal deflection electrodes in addition to the main horizontal deflection electrodes. A sawtooth waveform correction deflection voltage is applied to the second electrodes such as to slow the rate of electron beam scanning each time a portion of a fluorescent layer pattern 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.

REFERENCES:
patent: 4694225 (1987-09-01), Tomii et al.
patent: 4955681 (1990-09-01), Sekihara et al.

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