Advances In Ac-Electroluminescent Powder Layers

A. G. Fischer; K. Koger; D. Herbst; J. Knufer

doi:10.1117/12.955329

10 April 1977 Advances In Ac-Electroluminescent Powder Layers

A. G. Fischer, K. Koger, D. Herbst, J. Knufer

Proceedings Volume 0099, 3rd European Electro-Optics Conf; (1977) https://doi.org/10.1117/12.955329
Event: Third European Electro-Optics Conference, 1976, Geneva, Switzerland

Abstract

Abstract: New preparational remedies have been found against the deterioration of ac-field-excited, resin-embedded ZnS-type electroluminescent powder layers (abbreviated EL) during operation. So far, we have been able to prepare such displays already with high visual contrast in bright ambient, with an operating voltage of only 50 V (transistor-compatible) supplied by inexpensive new oscillators, and with white emission of any desired color temperature. Now with prolonged life, the whole range of display applications, from numeric indicators up to flat TV panels, becomes accessible. For these aging studies, the author's model of EL light generation of 1963 was the starting point, leading to such improvements as aluminum coactivation plus halogen particle-growth promotion, high-pressure sulfurization to reduce copper diffusion, and surface passivation by forming inert skins around each particle to prevent surface electrolysis. These methods will help to break Lehmann's monopoly on long-life phosphors and will also provide the elusive long-life blue-emitting EL powders needed for flat TV panels.

Citation Download Citation

A. G. Fischer, K. Koger, D. Herbst, and J. Knufer "Advances In Ac-Electroluminescent Powder Layers", Proc. SPIE 0099, 3rd European Electro-Optics Conf, (10 April 1977); https://doi.org/10.1117/12.955329

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available