video display device employing two SYNC generators
AssigneeThomson Consumer Electronics, Inc.
InventorsKenneth J. Helfrich, Joseph C. Stephens
Life of this patent
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Abstract
A video display has microcomputer control via a data bus and comprises a first sync generator coupled to the data bus for control by data thereon. A second sync generator is without controllable coupling to the data bus. A deflection amplifier is coupled to a deflection coil for generating a deflection current therein. A circuit for controlling the second sync generator is coupled to the first sync generator and is responsive to a digitally controlled signal therefrom. The second generator output signal is coupled to the deflection amplifier for deflection generation responsive to the digitally controlled signal.
Claims16
A video display having microcomputer control via a data bus comprising:
- a first sync generator coupled to said data bus for control by data thereon;
- an amplifier coupled to an inductance for generating a current therein;
- a second sync generator without controllable coupling to said data bus;
- and
- means for controlling said second sync generator coupled to said first sync generator and responsive to a digitally controlled signal therefrom, said second generator having an output signal coupled to said amplifier for synchronized current generation in said inductance responsive to said digitally controlled signal.
A video display having a microcomputer for control via a data bus said display comprising:
- a first sync generator being controlled by said data bus, said generator generating a signal indicative of at least two data bus control conditions;
- a second sync generator without control by said data bus and generating an output signal;
- a switch responsive to said indicative signal, coupled to said second sync generator to control generation of an output signal responsive to said control conditions;
- and
- a synchronizable power dissipating load being coupled to said output signal for synchronization and power generation and dissipation responsive to said data bus control conditions.
A video display operable in at least two television standards comprising:
- a first sync generator controlled via a data bus, and generating a signal indicative of at least two data bus control conditions;
- and
- a second sync generator synchronized by a video signal having one of said at least two television standards, and coupled to said first sync generator for control by said indicative signal, said second sync generator generating output synchronizing signals for deflection generation at said one of said at least two television standards.
Dependencies are inferred from the claim text.