| 摘要 |
PROBLEM TO BE SOLVED: To overcome disadvantages, such as many parts, undesirable power connections to a main board, a large daughter board profile, poor manufacturability, and high production cost, which present dimmable electronic ballasts have.SOLUTION: A dim control circuit dimming method and system with a dimming ballast dim control circuit includes a dimmer switch input section having a first terminal and a second terminal and functionally connected to receive a dim signal, a power supply, a current limiter, and a coupler. The power supply, the current limiter, and the coupler are connected in series between the first terminal and the second terminal, and the coupler generates a lamp dim control signal when the first terminal and the second terminal are electrically connected. The circuit, as the power supply, draws circuit power from an electric device to establish desired DC bus voltage at a half bridge circuit included in an electronic ballast. |
