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Electroluminescent devices with function of electro-optic shutter
Authors
Byeongdae Choi
Seok Hwan Chung
+3 more
Jaewook Jeong
Soon Moon Jeong
Seongkyu Song
Publication date
1 September 2012
Publisher
Optical Society of American (OSA)
Doi
Abstract
The polymer-dispersed liquid crystal (PDLC) was used as a dielectric layer of electroluminescent (EL) device to provide multi-function of electroluminescence and electro-optic shutter. A 50 μm-thick PDLC layer was formed between a transparent electrode and a ZnS:Cu phosphor layer. The electro-optic properties of the EL device were not distorted by the introduction of the PDLC layer. The extraction efficiency of luminescence was improved by more than 14% by PDLC layer. The transmittance of the PDLC was also founded not to be degraded significantly by excitation frequency. Therefore, the electroluminescence of the device was ignited by excitation frequency at a given voltage for full transparency of the PDLC. This device has great potential for applications in transparent displays with the function of a privacy window. © 2012 Optical Society of America.1
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Last time updated on 12/01/2024