{"id":281,"date":"2022-01-05T14:13:58","date_gmt":"2022-01-05T06:13:58","guid":{"rendered":"https:\/\/www.eee.hku.hk\/microLED\/?p=281"},"modified":"2022-01-05T14:14:00","modified_gmt":"2022-01-05T06:14:00","slug":"packaging-of-ingan-stripe-shaped-light-emitting-diodes","status":"publish","type":"post","link":"https:\/\/www.eee.hku.hk\/microLED\/packaging-of-ingan-stripe-shaped-light-emitting-diodes\/","title":{"rendered":"Packaging of InGaN stripe-shaped light-emitting diodes"},"content":{"rendered":"\n

– Y Park, KH Li, WY Fu, YF Cheung, and HW Choi<\/em><\/p>\n\n\n\n

\"\"
Schematic diagrams of the (a)\u00a0CM-LED, (b)\u00a0FC-LED, and (c)\u00a0VM-LED. Photographs of the (d)\u00a0CM-LED, (e)\u00a0FC-LED, and (f)\u00a0VM-LED driven at 10\u00a0mA.<\/figcaption><\/figure>\n\n\n\n

Applied Optics, vol. 57, 10, pp. 2452-2458 (2018)<\/em><\/strong><\/p>\n\n\n\n

We 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.<\/p>\n\n\n\n

DOI: <\/a><\/a><\/a><\/a><\/a><\/a>10.1364\/AO.57.002452<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

– Y Park, KH Li, WY Fu, YF Cheung, and HW Choi Applied Optics, vol. 57, 10, pp. 2452-2458 (2018) We demonstrate the fabrication of…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[12,6],"class_list":["post-281","post","type-post","status-publish","format-standard","hentry","category-publications","tag-led","tag-light-extraction"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.eee.hku.hk\/microLED\/wp-json\/wp\/v2\/posts\/281","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.eee.hku.hk\/microLED\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.eee.hku.hk\/microLED\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.eee.hku.hk\/microLED\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.eee.hku.hk\/microLED\/wp-json\/wp\/v2\/comments?post=281"}],"version-history":[{"count":1,"href":"https:\/\/www.eee.hku.hk\/microLED\/wp-json\/wp\/v2\/posts\/281\/revisions"}],"predecessor-version":[{"id":283,"href":"https:\/\/www.eee.hku.hk\/microLED\/wp-json\/wp\/v2\/posts\/281\/revisions\/283"}],"wp:attachment":[{"href":"https:\/\/www.eee.hku.hk\/microLED\/wp-json\/wp\/v2\/media?parent=281"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.eee.hku.hk\/microLED\/wp-json\/wp\/v2\/categories?post=281"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.eee.hku.hk\/microLED\/wp-json\/wp\/v2\/tags?post=281"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}