CONTROL CIRCUIT OF A FLASH START OF GETTER

CONTROL CIRCUIT OF A FLASH START OF GETTER

The circuit keeps the flash operation of the getter for certain time from the flash start so that the quantity of scattered barium is kept constant, then the residual gas in the CRT is absolutely absorbed. The circuit comprises a photoconductive cell (CDS) detecting the start flashing time of the ge...

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser: SON HWAN-IK
Format: Patent
Sprache:eng
Schlagworte:
BASIC ELECTRIC ELEMENTS
ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
ELECTRICITY
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Beschreibung
Zusammenfassung:The circuit keeps the flash operation of the getter for certain time from the flash start so that the quantity of scattered barium is kept constant, then the residual gas in the CRT is absolutely absorbed. The circuit comprises a photoconductive cell (CDS) detecting the start flashing time of the getter, a timer (TM) counting certain time from the detecting time of the flash, and a relay (RY2) cutting off the radio frequency voltage supplied to the induction coil at the end of the preset time.