Invention Grant
US08441213B2 Bidirectional phase cut modulation over AC power conductors 有权
通过交流电源导体进行双向相位调制

  • Patent Title: Bidirectional phase cut modulation over AC power conductors
  • Patent Title (中): 通过交流电源导体进行双向相位调制
  • Application No.: US12803573
    Application Date: 2010-06-29
  • Publication No.: US08441213B2
    Publication Date: 2013-05-14
  • Inventor: Steven Huynh
  • Applicant: Steven Huynh
  • Applicant Address: VG
  • Assignee: Active-Semi, Inc.
  • Current Assignee: Active-Semi, Inc.
  • Current Assignee Address: VG
  • Agency: Imperium Patent Works
  • Agent T. Lester Wallace; Darien K. Wallace
  • Main IPC: H05B37/02
  • IPC: H05B37/02
Bidirectional phase cut modulation over AC power conductors
Abstract:
A system includes a controller and line units. The controller receives AC power from a power source and supplies an AC power signal via two conductors to the units. In one example, the controller is a dimmer switch and the units are intelligent LED lamps. The controller uses phase cut modulation to communicate information (for example, lighting control commands) to the units. The units receive the AC power signal, demodulate and recover the phase cut modulated information, and optionally communicate information back to the controller using load modulation. An addressed unit changes loading on the two conductors from phase cut time to phase cut time, thereby modulating information onto the AC power signal. The controller monitors the AC power signal, and demodulates and recovers the information. The overall bidirectional communication is referred to as bidirectional phase cut modulation over AC power conductors. Units can be controlled individually or in groups.
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