| 摘要 |
PURPOSE: An indoor lighting device using an LED is provided to control the brightness of the LED of the indoor lighting device by using not only a light intensity sensor but also a temperature sensor. CONSTITUTION: An indoor lighting device is composed of an indoor lamp device, an SMPS(200) which supplies power to the indoor lamp device, and a controlling device(300) which controls the indoor lamp device. A printed circuit board, an LED which is electrically connected to the printed circuit board, and a temperature sensor(114) which senses the heat emitted from the printed circuit board and the LED are installed on the indoor lamp device. A current controlling device is installed inside or outside the indoor lamp device. The current controlling device controls the current provided to the LED of the indoor lamp device. A light intensity sensor(116) is installed outside the indoor lamp device. |
