| 摘要 |
PURPOSE:To permit deflecting distortion correction to be highly presice by freely conducting change distortion correction by means of data which are analog-converted from digital data. CONSTITUTION:A display device consists of a cathod-ray tube 3, a deflection york 2 and a display driving circuit 1. A horizontal timing signal 6 and a longitudinal timing signal 7 are taken-out from the circuits so as to be converted into address data 9 for reading from a digital memory 10 by a frame counter 8. Digital data 11 which is read by the data 9 are converted into an analog signal 13 by a D/A converter 12 and divided by a horizontal/vertical change-over signal 14. It is respectively added to a horizontal amplitude drive 4 and a vertical amplitude drive 5 as a horizontal correction drive 18 and a vertical correction drive 19 by a driving amplifier 17 through a sample-hold circuit 15 and LPF 16 so as to drive the deflection york. |
