| 摘要 |
PURPOSE:To easily change light emitting quantity and color by measuring the quantity of circumferential light and sound by a sensor for detecting it, converting the measured quantity to a voltage value or current value, and supplying this voltage value or current value to each light emitting body. CONSTITUTION:When the base 8 of a lighting device A is installed to a bulb socket, the switch of a control circuit 6 is turned on, and bulbs 1-3 in a cover are lighted. At that time a CCD element 7 is operated to detect the quantity of external light, which is converted into a current value in the element 7 and inputted to the control circuit 6, in which the current to send to the bulbs 1-3 is controlled according to this current value. Namely, when the current value is small, the current value to supply to the bulbs 1-3 is increased, Such a control of the bulbs 1-3 allows the control of the illumination while detecting the external light quantity. Hence, the light emitting quantity and color can be easily changed. |
