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Low voltage, blue phosphor for highly efficient field emission display screens

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5 Author(s)
Bolchouchine, V.A. ; Ram Phosphorix, 440 Saw Mill River Road, Ardsley, New York 10502 ; Goldburt, E.T. ; Levonovitch, B.N. ; Litchmanova, V.N.
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Ce-doped yttrium orthosilicate, P47, is a blue phosphor used in a nonsulfur containing phosphor triad for field emission display (FED) displays. Its low luminous efficiency does not allow one to achieve the necessary light output. For the first time, a modified yttrium orthosilicate, nonsulfur containing blue phosphor has been synthesized and 4 in. phosphor screens with superior performance have been fabricated. This performance, 1.4 lm/W intrinsic luminous efficiency at 400 V and 5 μA/cm2, is significantly better than that of Nichia 1047 phosphor, which is 0.5 lm/W. Based on this blue phosphor and phosphor screen performance, a white light output of 4.5–5 lm/W is now possible in low-voltage FED displays. This performance is dramatically higher than that of compatible active matrix liquid crystal displays. © 2001 American Vacuum Society.

Published in:

Journal of Vacuum Science & Technology B: Microelectronics and Nanometer Structures  (Volume:19 ,  Issue: 1 )

Date of Publication:

Jan 2001

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