Computer graphics processing and selective visual display system – Display driving control circuitry
Reexamination Certificate
2007-03-06
2007-03-06
Hjerpe, Richard (Department: 2629)
Computer graphics processing and selective visual display system
Display driving control circuitry
C345S211000, C345S212000, C345S213000, C345S690000, C315S370000, C315S371000, C315S408000, C323S258000
Reexamination Certificate
active
10127440
ABSTRACT:
A display apparatus having a high voltage FBT driving circuit includes a transformer having a primary and a secondary coil, a high voltage detector to detect an output voltage of the secondary coil, a high voltage compensator to output a high voltage compensating signal based on the detected voltage, a DC voltage controller to adjust a DC voltage according to the high voltage compensating signal and to output the adjusted DC voltage to the primary coil, a horizontal deflector to generate a horizontal deflecting pulse based on the DC voltage, a turns ratio adjuster to adjust a turns ratio of the primary and secondary coils, and a controller to control the turns ratio adjuster so as to make the output DC voltage higher than a lower limit when the frequency of a received horizontal synchronous signal is lower than a predetermined reference level.
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Hjerpe Richard
Nguyen Jennifer T.
Samsung Electronics Co,. Ltd.
Staas & Halsey , LLP
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