Patent ID: 7645049
Filing Date: 2010-01-12
Classification: F21S,G09F,Y10S

Abstract:
1. A method for controlling a liquid motion lamp, the method comprising: measuring a temperature Ts of at least one of a first liquid residing in a container and a second liquid residing in the container using a temperature sensor, the second liquid adapted to cooperate with the first liquid, wherein the first liquid has a lesser density than the second liquid at a higher temperature, and the first liquid has a greater density than the second liquid at a lower temperature; providing the temperature measurement Ts to a control circuit; generating a first heater power signal by the control circuit responsive to the temperature measurement Ts; providing the first heater power signal to a first heat source in thermal communication with the first liquid and the second liquid; and controlling the first heater power signal to maintain the first liquid and the second liquid in a desired temperature range.