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P‐209: Late‐News‐Poster: Electroluminescent Speaker
Author(s) -
Kang Taewook,
Lee Wunho,
Afandi Mohammad M.,
Ryu Jongho,
Lee Sunghoon,
Kim Jongsu
Publication year - 2020
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 - 10.1002/sdtp.14220
Subject(s) - electroluminescence , phosphor , materials science , voltage , piezoelectricity , sound pressure , luminescence , acoustics , optoelectronics , layer (electronics) , composite material , electrical engineering , physics , engineering
An electroluminescent (EL) speaker has been achieved by using phosphors as light‐emitting layer and piezoelectric material as dielectric layer. The orange lights from ZnS.Mn 2+ phosphor were exponentially dependent on the applied voltage while the sound pressure levels from piezoelectric sheet were linearly dependent on the applied voltage, with the same threshold voltage of 50 V The EL lights were linearly increased and then saturated at the inverse of the decay time (~ 600 Hz) with increasing the applied frequency while the sound pressure levels showed the flat response below 600 Hz and then parabolic increase above 600 Hz.