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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 20, Iss. 19 — Sep. 10, 2012
  • pp: 21074–21082

Electroluminescent devices with function of electro-optic shutter

Seongkyu Song, Jaewook Jeong, Seok Hwan Chung, Soon Moon Jeong, and Byeongdae Choi  »View Author Affiliations

Optics Express, Vol. 20, Issue 19, pp. 21074-21082 (2012)

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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 OSA

OCIS Codes
(160.3710) Materials : Liquid crystals
(230.0230) Optical devices : Optical devices
(230.2090) Optical devices : Electro-optical devices
(260.3800) Physical optics : Luminescence

ToC Category:
Optical Devices

Original Manuscript: July 18, 2012
Revised Manuscript: August 24, 2012
Manuscript Accepted: August 24, 2012
Published: August 29, 2012

Seongkyu Song, Jaewook Jeong, Seok Hwan Chung, Soon Moon Jeong, and Byeongdae Choi, "Electroluminescent devices with function of electro-optic shutter," Opt. Express 20, 21074-21082 (2012)

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