Invention Grant
US08742684B2 LED lighting system with accurate current control 有权
LED照明系统具有精确的电流控制

  • Patent Title: LED lighting system with accurate current control
  • Patent Title (中): LED照明系统具有精确的电流控制
  • Application No.: US13942220
    Application Date: 2013-07-15
  • Publication No.: US08742684B2
    Publication Date: 2014-06-03
  • Inventor: John L. Melanson
  • Applicant: Cirrus Logic, Inc.
  • Applicant Address: US TX Austin
  • Assignee: Cirrus Logic Inc.
  • Current Assignee: Cirrus Logic Inc.
  • Current Assignee Address: US TX Austin
  • Agent Steven Lin, Esq.
  • Main IPC: H05B37/02
  • IPC: H05B37/02
LED lighting system with accurate current control
Abstract:
A light emitting diode (LED) lighting system and method are disclosed. The LED lighting system and method include an LED controller to accurately control a current in an LED system. The LED controller includes components to calculate, based on the current and an active time period of an LED current time period, an actual charge amount delivered to the LED system wherein the LED current time period is duty cycle modulated at a rate of greater than fifty (50) Hz and to utilize the actual charge amount to modify and provide a desired target charge amount to be delivered during a future active time period of the LED current time period. The LED system and method further involve components to compare the actual charge amount to a desired charge amount for the active time period and compensate for a difference between the actual charge amount and the desired charge amount during the future active time period.
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