P‐209: Late‐News‐Poster: Electroluminescent Speaker. Issue 1 (25th September 2020)

• Record Type: Journal Article
• Authors: Kang, Taewook; Lee, Wunho; Afandi, Mohammad M.; Ryu, Jongho; Lee, Sunghoon; Kim, Jongsu
• Is Part Of: Digest of technical papers. Volume 51:Issue 1(2020)
• Page Start: 1682
• Page End: 1684
• Publication Date: 2020-09-25
• Subjects: Electroluminescent device -- Piezoelectric device -- ZnS:Mn2+ phosphor -- Lead zirconate titanate (PZT); Information display systems -- Congresses; 621.3815422
• DOI: 10.1002/sdtp.14220
• Languages: English
• ISSNs: 0097-966X

Abstract

Abstract : 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.