Flat panel light-emitting sounder using thin-film EL devices with a ceramic insulating layer

被引：0
|
作者：
Minami, Tadatsugu [1 ]
Miyata, Toshihiro [1 ]
Kitamura, Kentaro [1 ]
Takata, Shinzo [1 ]
Fukuda, Ichiro [1 ]
机构：
[1] Kanazawa Inst of Technology, Japan
来源：
Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers | 1990年 / 29卷 / 02期
关键词：
Barium Titanate - Electroluminescence - Phosphors - Piezoelectric Materials - Zinc Sulfide - Thin Films;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Sound emission has been achieved from an EL device consisting of a ZnS:Mn thin-film phosphor and a thick piezoelectric BaTiO3 ceramic insulator. The BaTiO3 ceramic, serving not only as the insulating layer of the EL device but also as the substrate, functioned as the sounder. A high sound pressure level as well as a high luminance was obtained in the device driven with audio-frequency voltages: above 90 dB in a flat panel speaker composed of four sound-emitting EL devices with a maximum luminance of 8000 cd/m2. Test results have shown that the sound emission is related to the electroluminescence.
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页码：315 / 318
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