A Study of the Ceramic EL Lamp (I) Consideration on th Design of a Reflecting Layer

• Published in: Journal of the Illuminating Engineering Institute of Japan Vol. 49; no. 1; pp. 11 - 18
• Main Authors: Serizawa, Akira, Inagaki, Zyozi, Saiki, Tadayuki
• Format: Journal Article
• Language: Japanese; English
• Published: The Illuminating Engineering Institute of Japan 1965
• ISSN: 0019-2341; 2185-1506; 1349-838X
• DOI: 10.2150/jieij1917.49.11

The design of the reflecting layer that is the first step in the production of ceramic electroluminescent lamps is one of the important factors deciding the characteristic of these lamps. Two important factors for the design of the reflecting layer are dielectric concentration and layer thickness. Theoretical concentration and thickness will be geometrically and electrically calculated. In this experimentation, titanate oxide is applied as the dielectric. Dielectric concentration and layer thickness will depend on the relations between the concentration of titanate oxide and the electric current, between the concentration of titanate oxide and the impedance of the reflecting layer, and between the impedance of the reflecting layer and the brightiness or the efficiency of the electroluminescent lamp. The impedance of a reflecting layer will increase in proportion to its thickness. The interaction between binder and titanate oxide has considerable influence on the relation between the rate of increase and the concentration. The equivalent circuit of the electroluminescent lamp will give the impedance of the reflecting layer, and therefrom the relation between layer thickness and brightness will also be obtained.