| 摘要 |
<p>A color temperature adjusting circuit for adjusting a color temperature of a light-emitting device is provided. The light-emitting device has a first light-emitting unit. The color temperature adjusting circuit includes a first circuit electrically connected to the first light-emitting unit, having a second light-emitting unit and a first conduction time, and adjusting the color temperature to a first status; a second circuit connected in parallel to the first circuit, having a third light-emitting unit and a second conduction time, and adjusting the color temperature to a second status; and a switch device electrically connected to the second circuit and a negative output terminal of an external voltage converting device, grounded, and controlling the first conduction time and the second conduction time.</p> |
