Trailing edge dimmer compatibility with dimmer high resistance prediction

Patent metadata

Field	Value
Publication number	US-9155163-B2
Application number	US-201314012775-A
Country	US
Kind code	B2
Filing date	Aug 28, 2013
Priority date	Nov 16, 2010
Publication date	Oct 6, 2015
Grant date	Oct 6, 2015

Abstract

In at least one embodiment, an electronic system includes a controller, and the controller provides compatibility between an electronic light source and a trailing edge dimmer. In at least one embodiment, the controller is capable of predicting an estimated occurrence of a trailing edge of a phase cut AC voltage and accelerating a transition of the phase cut AC voltage from the trailing edge to a predetermined voltage threshold. In at least one embodiment, the controller predicts an estimated occurrence of the trailing edge of the phase cut AC voltage on the basis of actual observations from one or more previous cycles of the phase cut AC voltage.

First claim

What is claimed is:

1. An apparatus comprising:
a controller to provide compatibility between a lamp and a trailing edge dimmer, wherein the controller is configured to:
predict an estimated time when the trailing edge dimmer enters a high resistance state, wherein the time when the trailing edge dimmer enters the high resistance state occurs when the trailing edge dimmer begins phase cutting an alternating current (AC) voltage signal;
operate in a high current mode based on th…

Assignees

• Cirrus Logic Inc

Inventors

• Melanson John L
• King Eric J

Classifications

• H05B45/3575

  Electricity · mapped topic

• H05B45/10

  Electricity · mapped topic

• H05B33/0851

  Electricity · mapped topic

• H05B37/02 Primary

  Electricity · mapped topic

• H05B33/0815

  Electricity · mapped topic