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(12) United States Patent (10) Patent No.: US 8,888,318 B2 Yang Et Al

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(12) United States Patent (10) Patent No.: US 8,888,318 B2 Yang Et Al USOO8888318B2 (12) United States Patent (10) Patent No.: US 8,888,318 B2 Yang et al. (45) Date of Patent: Nov. 18, 2014 (54) LED SPOTLIGHT (56) References Cited (75) Inventors: Haitao Yang, San Jose, CA (US); U.S. PATENT DOCUMENTS Yi-Qun Li, Danville, CA (US) 3,290,255 A 12/1966 Smith 3,593,055 A 7, 1971 Geusic et al. (73) Assignee: Internati Corporation, Fremont, CA 3,670,193 A 6/1972 Thorington et al. (US) (Continued) (*) Notice: Subject to any disclaimer, the term of this patent is extended or adjusted under 35 FOREIGN PATENT DOCUMENTS U.S.C. 154(b) by 745 days. CN 101182908 A 5, 2008 21) Appl. No.: 13/156,183 CN 1.01614374. A 12/2009 (21) Appl. No.: 9 (Continued) (22) Filed: Jun. 8, 2011 OTHER PUBLICATIONS (65) Prior Publication Data “Fraunhofer-Gesellschafl: Research News Special 1997. http:// US 2012/0140466A1 Jun. 7, 2012 www.fhg depress md-emd1997 sondert2.hlm,(accessed on Jul. 23, 1998). Jan. 1997, Publisher: Fraunhofer Institute. Related U.S. Application Data (Continued) (60) Provisional application No. 61/354,049, filed on Jun. 11, 2010. Primary Examiner — Anabel Ton (74) Attorney, Agent, or Firm — Vista IP Law Group, LLP (51) Int. Cl. F2IV I/00 (2006.01) (57) ABSTRACT F2IK 99/00 (2010.01) An LED spotlight that is operable to emit light with a selected F2IV 700 (2006.01) emission angle measured relative to an emission axis of the F2IV 7/09 (2006.01) spotlight comprises: a dish shaped (parabolic) reflector and a F2I Y IOI/O2 (2006.01) plurality of LEDs, wherein the LEDs are configured such that F2I Y III/OO (2006.01) in operation each emits light in a generally radial direction to (52) U.S. Cl. the emission axis of the spotlight and wherein the light emis CPC ............. F2IK 9/137 (2013.01); F2IY 2101/02 sion axis of the LEDs is configured at an angle to the emission (2013.01); F2IV 7/0008 (2013.01); F2IV 7/09 axis of the spotlight of at least 40°. In preferred embodiments (2013.01); F2IY 21 1 1/007 (2013.01); YIOS the LEDs are configured such that their emission axis is 362/80 (2013.01) Substantially orthogonal to the emission axis of the spotlight USPC ....................... 362/235: 362/249.02: 362/8OO and the reflector comprises a respective parabolic light reflec (58) Field of Classification Search tive Surface portion associated with a respective one of the CPC ................................... F21K9/137; F21V 7/09 LEDS. USPC ..................................... 362/249.02, 235, 800 See application file for complete search history. 27 Claims, 10 Drawing Sheets US 8,888,318 B2 Page 2 (56) References Cited 6,340,824 B1 1/2002 Komoto et al. 6,350,041 B1 2/2002 Tarsa U.S. PATENT DOCUMENTS 6,504,301 B1 1/2003 Lowery 6,576.488 B2 6/2003 Collins et al. 3,676,668 A 7/1972 Collins et al. 6,600,175 B 72003 Baretz et al. 3 691.482 A 9, 1972 Pinnow et al. 6,642,618 B2 11/2003 Yagi et al. 3709.685 A 1/1973 Hercock et al. 6,642,652 B2 11/2003 Collins et al. 3,743,833. A 7/1973 Martie et al. 6,869,812 B1 3/2005 Liu 3,763,405 A 10, 1973 Mitsuhata 7,048,412 B2 ck 5/2006 Martin et al. 362.247 3.793,046 A 2f1974 Wanmaker et al. 7,153,015 B2 12/2006 Brukilacchio 3,819,973 A 6/1974 Hosford 7,311,858 B2 12/2007 Wang 3,819,974. 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