The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 12, 2013
Filed:
May. 01, 2012
Chung Hoon Lee, Gwangmyeong-si, KR;
James S. Speck, Santa Barbara, CA (US);
Hong San Kim, Seongnam-si, KR;
Jae JO Kim, Uiwang-si, KR;
Sung Han Kim, Suwon-si, KR;
Jae Ho Lee, Yongin-si, KR;
Chung Hoon Lee, Gwangmyeong-si, KR;
James S. Speck, Santa Barbara, CA (US);
Hong San Kim, Seongnam-si, KR;
Jae Jo Kim, Uiwang-si, KR;
Sung Han Kim, Suwon-si, KR;
Jae Ho Lee, Yongin-si, KR;
Seoul Opto Device Co., Ltd., Ansan-si, KR;
Abstract
Disclosed is an improved light-emitting device for an AC power operation. An AC light-emitting device according to the present invention employs a variety of means by which light emission time is prolonged during a ½ cycle in response to a phase change of an AC power source and a flicker effect can be reduced. For example, the means may be switching blocks respectively connected to nodes between the light emitting cells, switching blocks connected to a plurality of arrays, or a delay phosphor. Further, there is provided an AC light-emitting device, wherein a plurality of arrays having the different numbers of light emitting cells are employed to increase light emission time and to reduce a flicker effect.