Cathode-ray display system

Claim 1

A CATHODE-RAY TUBE DISPLAY SYSTEM FOR DISPLAYING THE INFORMATION REPRESENTED BY AN INPUT SIGNAL, WHICH INPUT SIGNAL INCLUDES INFORMATION SIGNAL COMPONENTS AND SYNCHRONIZING SIGNAL COMPONENTS, SAID DISPLAY SYSTEM INCLUDING: A CATHODE-RAY TUBE HAVING A DISPLAY SCREEN, CATHODE-RAY BEAM PRODUCING AND DIRECTING MEANS, CATHORDE-RAY BEAM INTENSITY MODULATING MEANS, AND CATHODERAY BEAM DEFLECTION MEANS; FIRST CIRCUIT MEANS COUPLED TO SAID BEAM MODULATING MEANS AND RESPONSIVE TO THE INPUT SIGNAL FOR CAUSING THE INTENSITY OF A CATHODE-RAY BEAM IN SAID TUBE TO BE MODULATED IN ACCORDANCE WITH THE INFORMATION SIGNAL COMPONENTS OF SAID INPUT SIGNAL AND COUPLED TO SAID DEFLECTION MEANS AND RESPONSIVE TO AND COUPLED TO SAID DEFLECTION MEANS AND RESPONSIVE TO THE SYNCHRONIZING SIGNAL COMPONENTS OF SAID INPUT SIGNAL MODULATED BEAM ALONG A SINGLE PATH ACROSS SAID DISPLAY SCREEN IN SYNCHRONISM WITH THE INPUT SIGNAL; AND ELECTRICALLY CONDUCTIVE APERTURED MASK MEMBER POSITIONED IN SAID CATHODE-RAY TUBE AND DISPLACED AT LEAST PARTIALLY FROM SAID PATH TO BE RECURRENTLY SCANNED BY A CATHODE-RAY BEAM IN SAID TUBE; A CONDUCTIVE MEMBER POSITIONED IN SAID CATHODE-RAY TUBE ADJACENT SAID APERTURED MASK MEMBER AND PARTIALLY MASKED THEREBY; SECOND CIRCUIT MEANS COUPLED TO SAID MASK MEMBER AND TO SAID CONDUCTIVE MEMBER FOR PRODUCING A CONTROL SIGNAL HAVING A CHARACTERISTIC VARYING IN CORRESPONDENCE WITH VARIATIONS IN THE BEAM DEFLECTION SPEED ACROSS SAID DISPLAY SCREEN; AND FURTHER CIRCUIT MEANS COUPLED TO SAID SECOND CIRCUIT MEANS AND TO SAID DEFLECTION MEANS AND RESPONSIVE TO SAID CONTROL SIGNAL FOR COMPENSATING FOR SUCH SPEED VARIATIONS IN THE BEAM DEFLECTION ACROSS SAID DISPLAY SCREEN.