Patent · US Expired

Dimming control circuit for light-emitting diodes

US7145295B1 · kind B1 · utility

122Cited by
2References
10Claims
0Family size

Assignee

Inventors

Key dates

Filing dateJul 24, 2005
Grant dateDec 5, 2006
Priority date
Expiry dateAug 1, 2025

Classification

  • Technology area (CPC Y)Emerging Cross-Sectional Technologies
  • CPC primaryY10S315/04
  • WIPO fieldElectrical machinery, apparatus, energy
  • WIPO sectorElectrical engineering

Abstract

A dimming control circuit generates a dimming control signal for determining brightness of at least one light-emitting diode. The dimming control signal has a plurality of bright-dark cycles, each of which consists of a bright phase and a dark phase. The bright phase starts with an adaptive rising portion. The adaptive rising portion restricts the brightness of the at least one light-emitting diode to increase gradually from zero.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.