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25.3: Optimized Phosphors for Field Emission Displays
Author(s) -
Cummings B.,
Pearson R.,
Kajiwara K.,
Kato Y.,
Hatano Y.,
Ito Y.
Publication year - 2001
Publication title -
sid symposium digest of technical papers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.351
H-Index - 44
eISSN - 2168-0159
pISSN - 0097-966X
DOI - 10.1889/1.1831886
Subject(s) - phosphor , gamut , field emission display , brightness , materials science , luminous efficacy , activator (genetics) , optoelectronics , high color , optics , computer science , field electron emission , chemistry , electron , nanotechnology , physics , artificial intelligence , layer (electronics) , color image , biochemistry , quantum mechanics , image processing , image (mathematics) , gene
Candescent Technologies and SONY have developed the first commercially viable, full color, high performance field emission display (FED) which combines the premium visual performance of a color CRT in a thin flat panel package. Because of the similarity between the FED and CRT electron excitation, the FED can use the conventional P22 color CRT phosphor triad. However in this paper we will show improved performance for screens based on phosphors optimized for the lower accelerating voltage of the FED (7–10 kV). Data will be presented showing screen performance in full color FED's including color gamut, white screen brightness and luminous efficacy. This data will compare optimized phosphors with the P22 color CRT phosphors. The most striking improvement has been seen for the ZnS:Ag blue phosphor where the optimized phosphor shows higher efficacy, superior color saturation, and improved maintenance of efficacy with coulombic aging when compared to the P22 blue phosphor. Factors which influence the phosphor performance will be discussed including activator and co‐activator concentration as well as phosphor crystal structure as measured by cross sectional TEM.