| 摘要 |
PROBLEM TO BE SOLVED: To provide an LED lighting device which is simple in structure, easy in the switching of positions of lighting LEDs, can easily change the light emission intensity of the LEDs.SOLUTION: This LED lighting device 1 comprises: two pieces of conductors L1, L2; a plurality of red LEDs 11 connected in parallel between the two pieces of the conductors L1, L2; a plurality of white LEDs 12 connected in parallel between the two pieces of the conductors L1, L2 at polarities reverse to those of the red LEDs 11; and a switching device 25 which inverts polarities of a DC voltage applied between the two pieces of the conductors L1, L2. While the red LEDs 11 and the white LEDs 12 are simple in structures so that they are connected in parallel between the two pieces of the conductors L1, L2 in a plurality of pieces so as to be inverted in polarities, positions of the lighting LEDs can be changed by only inverting the polarities of the DC voltage applied between the two pieces of the conductors L1, L2 by the switching device 25, and thereby the light emission intensity of the LEDs can be changed as a whole. |
