| 摘要 |
<p>A variable color LED device emits variations of luminescent colors, and an LED color control device (current control circuit) controls the emission (color and intensity) from the variable color LED device. Luminescent diodes R, G, and B are provided in a single variable color LED device 10 to emit light of red, green, and blue. The electric current flowing to the luminescent diodes is controlled for each color by a current control circuit 15. The current control circuit 15 comprises, fox example, variable resistances 16r, 16g, and 16b. Optionally controlling the electric current through the variable resistances allows the quantity of light of each of optical three primary colors, thereby emitting a mixed color from the luminescent diodes of the variable color LED device 10. Thus, variations of luminescent colors can be successfully emitted. The device can be used both indoors and outdoors as a display picture element for a color display device, etc. Its small picture element realizes a precise image.</p> |
