Invention Grant
US08952622B2 Light emitting diode driving apparatus, driving method of light emitting diode, and computer-readable recording medium
有权
发光二极管驱动装置，发光二极管的驱动方法和计算机可读记录介质
- Patent Title: Light emitting diode driving apparatus, driving method of light emitting diode, and computer-readable recording medium
- Patent Title (中): 发光二极管驱动装置，发光二极管的驱动方法和计算机可读记录介质
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Application No.: US13779929Application Date: 2013-02-28
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Publication No.: US08952622B2Publication Date: 2015-02-10
- Inventor: Sang-hoon Lee , Myoung-jun Lee , Byeong-cheol Hyeon
- Applicant: Samsung Electronics Co., Ltd.
- Applicant Address: KR Suwon-si
- Assignee: Samsung Electronics Co., Ltd.
- Current Assignee: Samsung Electronics Co., Ltd.
- Current Assignee Address: KR Suwon-si
- Agency: Sughrue Mion, PLLC
- Priority: KR10-2012-0069163 20120627
- Main IPC: H05B37/02
- IPC: H05B37/02 ; H05B33/08
Abstract:
A light emitting diode (LED) driving apparatus includes a DC-DC converter which provides a driving voltage to a plurality of LED arrays; a plurality of switching units, each of the switching units being connected in series to a corresponding LED array of the plurality of LED arrays and varying a size of a driving current to flow in the corresponding LED array of the plurality of LED arrays; and a control unit which, in order for each of the switching units to operate within a predetermined headroom voltage range, calculates a driving current of each of the plurality of LED arrays and a duty cycle of the switching units corresponding to each of the plurality of LED arrays, and controls the plurality of switching units based on the calculated driving current and the calculated duty cycle.
Public/Granted literature
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