中科微点-全球专利检索

  1. Login
  2. Sign Up
Invention Grant
US08723446B2 Method and circuit arrangement for cycle-by-cycle control of a LED current flowing through a LED circuit arrangement, and associated circuit composition and lighting system 有权
逐步控制流经LED电路装置的LED电流以及相关的电路组成和照明系统的方法和电路装置

  • Patent Title: Method and circuit arrangement for cycle-by-cycle control of a LED current flowing through a LED circuit arrangement, and associated circuit composition and lighting system
  • Patent Title (中): 逐步控制流经LED电路装置的LED电流以及相关的电路组成和照明系统的方法和电路装置
  • Application No.: US12992091
    Application Date: 2009-05-06
  • Publication No.: US08723446B2
    Publication Date: 2014-05-13
  • Inventor: Gian Hoogzaad , Wilhelmus H. M. Langeslag , Frans Pansier , Cheng Zhang
  • Applicant: Gian Hoogzaad , Wilhelmus H. M. Langeslag , Frans Pansier , Cheng Zhang
  • Applicant Address: NL Eindhoven
  • Assignee: NXP B.V.
  • Current Assignee: NXP B.V.
  • Current Assignee Address: NL Eindhoven
  • Priority: EP08156072 20080513
  • International Application: PCT/IB2009/051861 WO 20090506
  • International Announcement: WO2009/138908 WO 20091119
  • Main IPC: H05B37/02
  • IPC: H05B37/02
Method and circuit arrangement for cycle-by-cycle control of a LED current flowing through a LED circuit arrangement, and associated circuit composition and lighting system
Abstract:
The invention provides a method for cycle-by-cycle control of a LED current (ILED) flowing through a LED circuit arrangement (LEDCIRC) at a mean LED current level. The method comprises a) establishing a converter current (IL), b) establishing an oscillation of the converter current (IL) between substantially a valley current level and substantially a peak current level, c) feeding the LED circuit arrangement (LEDCIRC) with the converter current (IL) as the LED current during a part of an oscillation cycle of the oscillation of the converter current, d) determining a current level correction for compensating a current level error between an integral over an oscillation cycle of the LED current and a reference, the reference being representative of the mean LED current level, and e) adjusting at least one of the valley current level and the peak current level with the current level correction for use in a successive cycle of the oscillation of the converter current. The invention also provides a circuit arrangement operable for using the method, a LED driver IC using the circuit arrangement, a circuit composition with at least one LED and the circuit arrangement, and a lighting system with the circuit composition.
Abstract(Chinese):

本发明提供了一种在平均LED电流水平下逐步控制流过LED电路装置（LEDCIRC）的LED电流（ILED）的方法。 该方法包括：a）建立转换器电流（IL），b）建立基本上谷值电流水平和基本上峰值电流水平之间的转换器电流（IL）的振荡，c）将LED电路装置（LEDCIRC）馈送到 在转换器电流的振荡的振荡周期的一部分期间，转换器电流（IL）作为LED电流，d）确定用于补偿LED电流的振荡周期之间的积分和电流水平误差的电流电平校正， 参考，该参考代表平均LED电流电平，以及e）利用当前电平校正来调整谷电流电平和峰值电流电平中的至少一个，以用于转换器电流的振荡的连续循环。 本发明还提供一种可用于使用该方法的电路装置，使用电路装置的LED驱动器IC，具有至少一个LED的电路组合和电路装置，以及具有电路组成的照明系统。

Public/Granted literature
Information query
Espacenet
Patent Agency Ranking
0/0