File Download

There are no files associated with this item.

  Links for fulltext
     (May Require Subscription)
Supplementary

Article: Packaging of InGaN stripe-shaped light-emitting diodes

TitlePackaging of InGaN stripe-shaped light-emitting diodes
Authors
Issue Date2018
PublisherOSA. The Journal's web site is located at http://ao.osa.org/journal/ao/about.cfm
Citation
Applied Optics, 2018, v. 57, p. 2452 How to Cite?
AbstractWe demonstrate the fabrication of InGaN/GaN stripe-shaped light-emitting diodes (LEDs) in flip-chip packaging (FC-LED) and vertically mounted packaging (VM-LED). Compared to conventionally packaged LEDs, these packaging schemes enhance light output and emission divergence in ways favorable for general lighting applications. The FC-LED can sustain efficiency at high current operations due to effective heat sinking, while the VM-LED excels at light extraction efficiency due to the exposure of two large emission surfaces. Together with the properties of low luminous exitance and emission uniformity, the stripe-shaped LEDs are ideal for the assembly of luminaires. An LED light tube comprising a continuous linear array of 10 stripe-shaped LED chips has been assembled. The optical performance of the light tube is compared to another light tube assembled with conventional square-shaped LED chips (with and without external diffuser) by confocal microscopy. It is found that emission uniformity of the stripe-shaped LED tube is significantly improved, with a threefold increase in illumination area, without efficiency loss associated with diffusers.
Persistent Identifierhttp://hdl.handle.net/10722/259278

 

DC FieldValueLanguage
dc.contributor.authorPARK, Y-
dc.contributor.authorLi, KH-
dc.contributor.authorFu, WYG-
dc.contributor.authorCheung, YF-
dc.contributor.authorChoi, HW-
dc.date.accessioned2018-09-03T04:04:20Z-
dc.date.available2018-09-03T04:04:20Z-
dc.date.issued2018-
dc.identifier.citationApplied Optics, 2018, v. 57, p. 2452-
dc.identifier.urihttp://hdl.handle.net/10722/259278-
dc.description.abstractWe demonstrate the fabrication of InGaN/GaN stripe-shaped light-emitting diodes (LEDs) in flip-chip packaging (FC-LED) and vertically mounted packaging (VM-LED). Compared to conventionally packaged LEDs, these packaging schemes enhance light output and emission divergence in ways favorable for general lighting applications. The FC-LED can sustain efficiency at high current operations due to effective heat sinking, while the VM-LED excels at light extraction efficiency due to the exposure of two large emission surfaces. Together with the properties of low luminous exitance and emission uniformity, the stripe-shaped LEDs are ideal for the assembly of luminaires. An LED light tube comprising a continuous linear array of 10 stripe-shaped LED chips has been assembled. The optical performance of the light tube is compared to another light tube assembled with conventional square-shaped LED chips (with and without external diffuser) by confocal microscopy. It is found that emission uniformity of the stripe-shaped LED tube is significantly improved, with a threefold increase in illumination area, without efficiency loss associated with diffusers.-
dc.languageeng-
dc.publisherOSA. The Journal's web site is located at http://ao.osa.org/journal/ao/about.cfm-
dc.relation.ispartofApplied Optics-
dc.titlePackaging of InGaN stripe-shaped light-emitting diodes-
dc.typeArticle-
dc.identifier.emailLi, KH: khli@eee.hku.hk-
dc.identifier.emailFu, WYG: wyfu@hku.hk-
dc.identifier.emailCheung, YF: yukfaira@hku.hk-
dc.identifier.emailChoi, HW: hwchoi@hku.hk-
dc.identifier.authorityLi, KH=rp02142-
dc.identifier.authorityChoi, HW=rp00108-
dc.identifier.doi10.1364/AO.57.002452-
dc.identifier.hkuros288871-
dc.identifier.volume57-
dc.identifier.spage2452-
dc.identifier.epage2452-

Export via OAI-PMH Interface in XML Formats


OR


Export to Other Non-XML Formats