| 摘要 |
PURPOSE: A lighting control apparatus communicating with overhead projector(OHP) is provided to improve the meeting effect and to save the energy by using the wireless communication between the OHP and lighting switches. CONSTITUTION: The lighting control apparatus comprises a photo cell(1) placed within the OHP for detecting the lamp light, a current transformer(2) for detecting the lamp operation current and for producing an electrical signal, an electronic transfer apparatus(3) for receiving at least one of the outputs from the photo cell or the current transformer, and a remote automatic switch(4) to turn on or off the interior illumination. The electronic transfer apparatus generates an infrared rays or a high-frequency radio waves to communicate with the remote automatic switches. If the OHP is turned on state, then lighting control apparatus automatically turns off the interior illumination. If the OHP is turned off state, then interior illuminators are turned on by the lighting control apparatus. |
