Invention Grant
US08368312B2 Circuit and method of driving light emitting diodes, and light emitting diode system having the same
有权
驱动发光二极管的电路和方法，以及具有该发光二极管的发光二极管系统
- Patent Title: Circuit and method of driving light emitting diodes, and light emitting diode system having the same
- Patent Title (中): 驱动发光二极管的电路和方法，以及具有该发光二极管的发光二极管系统
-
Application No.: US12840539Application Date: 2010-07-21
-
Publication No.: US08368312B2Publication Date: 2013-02-05
- Inventor: Yong-Hun Kim , Wan-Jung Kim , Hee-Seok Han
- Applicant: Yong-Hun Kim , Wan-Jung Kim , Hee-Seok Han
- Applicant Address: KR Suwon-si, Gyeonggi-do
- Assignee: Samsung Electronics Co., Ltd.
- Current Assignee: Samsung Electronics Co., Ltd.
- Current Assignee Address: KR Suwon-si, Gyeonggi-do
- Agency: Lee & Morse, P.C.
- Priority: KR10-2009-0107714 20091109
- Main IPC: G09G5/10
- IPC: G09G5/10 ; H05B37/00
Abstract:
A light-emitting-diode driving circuit includes a current driving circuit configured to control current signals flowing through light-emitting-diode strings in response to a first signal that includes information of a light-emitting-diode current, a dynamic headroom controller configured to generate a third control signal that changes according to a change of the current signals flowing through the light-emitting-diode strings based on voltage signals of first terminals of each of the light-emitting-diode strings and a second control signal that includes the information of the light-emitting-diode current, and a power supply circuit configured to generate a light-emitting-diode driving voltage that changes in response to the third control signal, and provide the light-emitting-diode driving voltage to second terminals of each of the light-emitting-diode strings.
Public/Granted literature
- US20110109243A1 CIRCUIT AND METHOD OF DRIVING LIGHT EMITTING DIODES, AND LIGHT EMITTING DIODE SYSTEM HAVING THE SAME Public/Granted day:2011-05-12
Information query
