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dc.contributor.authorChao, Paul C-P.en_US
dc.contributor.authorShen, C. -Y.en_US
dc.contributor.authorChiu, C. -W.en_US
dc.contributor.authorHuang, J. -S.en_US
dc.contributor.authorKao, Y. -Y.en_US
dc.contributor.authorTu, T. -Y.en_US
dc.contributor.authorWang, C. -L.en_US
dc.contributor.authorChi, Solomonen_US
dc.contributor.authorLin, H. -W.en_US
dc.contributor.authorTsai, S. -Y.en_US
dc.date.accessioned2014-12-08T15:12:40Z-
dc.date.available2014-12-08T15:12:40Z-
dc.date.issued2008-02-01en_US
dc.identifier.issn1071-0922en_US
dc.identifier.urihttp://dx.doi.org/10.1889/1.2841866en_US
dc.identifier.urihttp://hdl.handle.net/11536/9749-
dc.description.abstractThe objective of this study is to design a novel cone-shaped lens cap on LEDs in order to achieve high optical efficiency in an ultra-thin directly lit RGB LED backlight unit (BLU) for large-sized LCD TVs. The use of the novel lens cap could play the role of a diffuser, a low light-efficiency component in a BLU, in order to gain higher efficiency and simultaneously provide satisfactory uniformity in light distribution. The novel cone-shaped lens is coated with aluminum on the outside surface of the cone for mirroring effects to reflect most of the LED emitted light horizontally and then reflect the light at the BLU boundaries, and then, finally to the output plane. In this way, bright spots on the output plane of the BLU can be avoided, leading to increased uniformity. Simulations were conducted to design and optimize varied aspects of the designed lens and BLU, including the cone angle of the proposed lens and the LED spacing (pitch). To further achieve color balance, a known Genetic Algorithm is used to search for the optimal angular placement of each RGB LED, resulting in better color balance. Finally, a prototype BLU for large-sized 37-in. LCD TVs with the proposed lens was built to verify the expected performance.en_US
dc.language.isoen_USen_US
dc.subjectdirectly lit backlit uniten_US
dc.subjectlight-emitting diode (LED)en_US
dc.subjectcone-shaped lensen_US
dc.subjectLCD TVsen_US
dc.subjectgenetic algorithmen_US
dc.titleA novel lens cap designed for the RGB LEDs installed in an ultra-thin and directly lit backlight unit of large-sized LCD TVsen_US
dc.typeArticleen_US
dc.identifier.doi10.1889/1.2841866en_US
dc.identifier.journalJOURNAL OF THE SOCIETY FOR INFORMATION DISPLAYen_US
dc.citation.volume16en_US
dc.citation.issue2en_US
dc.citation.spage317en_US
dc.citation.epage327en_US
dc.contributor.department電控工程研究所zh_TW
dc.contributor.departmentInstitute of Electrical and Control Engineeringen_US
dc.identifier.wosnumberWOS:000256457100016-
dc.citation.woscount4-
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