LED light source upstart --- high density COB three male hegemony rival LED lighting business applications with increased competition, smaller, higher performance and higher reliability of LED lamp structure has become a business according to industry competing goal . Traditional LED light source with gold wire package structure, the line easily and the light source itself colloid expansion and contraction forces pull injury, leading to dead lights, and large conventional LED light source (including COB) light-emitting surface, matching the small angle secondary optical When the device, lighting bulky and not easy to look lamp structure optimization. In this trend, with a small light-emitting surface high intensity beam output characteristics, high-density packaging structure without gold COB become a large LED light source in a dazzling star, it has been widely applied in the field of high-end commercial lighting fixtures. Currently, officially launched in the market of high-density COB products mainly include three companies, namely Cree CREE CXA HD series, Toyo TOYONIA YOLL HR series, Citizen CITIZEN HI series. Select the more common of the three models in the three series of products of high density COB comparative analysis, for reference. As can be seen from the above comparison, the differences among the three product application parameters is not, but compared with conventional COB, the unit light-emitting surface applied power increased dramatically. In the product structure and physical strength: Note: The number of "★" The more the higher the score. The same below. In terms of light and color: wherein Toyo TOYONIA YOLL HR series offers W3000K special light color, relatively step ahead. In color terms: in the center of the light intensity aspect, under the same test conditions, the measured contrast: in terms of price: In summary, the three products in the high-density COB application performance nearly tied, have their own advantages; from the brand influence aspect, CREE, CITIZEN slightly better; the product cost performance, TOYONIA YOLL HR series of obvious advantages. Currently, Langmingnasi Luminus, Bridgelux Bridgelux has been or is about to launch a high-density COB series. No Which domestic packaging companies officially launched the technology gap significantly related R & D investment should be strengthened. 

keywords: Flip COB, high light efficiency COB, track lights COB, spotlights COB, high density COB,