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The decline of impregnated cathodes in CRTs

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2 Author(s)
den Engelsen, D. ; LG Philips Displays, Eindhoven, Netherlands ; Tong, Linsu

In the 1990s, various CRT-companies introduced impregnated cathodes (I-cathodes) in color picture tubes (CPTs) in order to meet the requirements of good life performance at high beam currents. The initially successful introduction of I-cathodes in mass production did not result in a complete change over; on the contrary, I-cathodes are gradually phased out from CRTs. The reasons are the recent improvements of oxide cathodes, rather high cost of I-cathodes, sensitivity of I-cathodes for ion bombardment and electron optic considerations.

Published in:

Vacuum Electron Sources Conference, 2004. Proceedings. IVESC 2004. The 5th International

Date of Conference:

6-10 Sept. 2004