Electric lamp and discharge devices: systems – Cathode ray tube circuits – Cathode-ray deflections circuits
Reexamination Certificate
2006-02-14
2006-02-14
Dinh, Trinh Vo (Department: 2821)
Electric lamp and discharge devices: systems
Cathode ray tube circuits
Cathode-ray deflections circuits
C315S364000
Reexamination Certificate
active
06998798
ABSTRACT:
A digitally-controlled vertical S linearity correction with a constant amplitude without using an AGC. To preserve line spacing between horizontal lines toward a top and bottom of a screen a third order correction voltage Vcubeis applied to a sweep voltage Vosc. A constant current decoder determines an amount of appropriate correction current, which is employed to generate a sweep voltage with modified amplitude due to S correction and one without the modified amplitude. The sweep voltage with constant amplitude is employed to generate Vcube. Vcubeis then applied to the sweep voltage along with a compensated amplitude component of the sweep voltage, such that a reduction in the amplitude caused by the S correction is compensated in the output voltage Vout. The compensation of the output voltage amplitude prevents a size reduction of the displayed picture on the screen without employing an iterative auto-align process.
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STMicroelectronics. TDAS9112 Low-Cost I2C Controlled Deflection Processor for Multisync Monitor. Aug. 2003. 26pp.
Guan Charles
Hojabri Peyman
Branch John W.
Darby & Darby P.C.
Dinh Trinh Vo
National Semiconductor Corporation
Vy Hung Tran
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