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Alternating-current light emitting diodes with a diode bridge circuitry

  • Jaehee Cho*
  • , Jaewook Jung
  • , Jung Hye Chae
  • , Hyungkun Kim
  • , Hyunsoo Kim
  • , Jeong Wook Lee
  • , Sukho Yoon
  • , Cheolsoo Sone
  • , Taehoon Jang
  • , Yongjo Park
  • , Euijoon Yoon
  • *Corresponding author for this work
  • Samsung
  • Seoul National University

Research output: Contribution to journalJournal articlepeer-review

Abstract

Most solid-state light emitting devices operate under direct current (DC) condition now. We report the alternating current (AC) light emitting devices fabricated with a diode bridge circuitry which is also made of light emitting diodes (LEDs). The LED bridge circuitry which is flipped on a silicon submount is composed of 4 branches with 7 LED chips and participates as a light emitting component as well. The AC LED can be operated with radiant flux of 0.83 W at an electric power of 8.5 W. This concept could be applied to fabricate compact and economical AC LEDs for a solid-state illumination.

Original languageEnglish
Pages (from-to)L1194-L1196
JournalJapanese Journal of Applied Physics
Volume46
Issue number45-49
DOIs
StatePublished - 2007.12.14

Keywords

  • Alternating current
  • Gallium nitride
  • Light emitting diode

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