| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a lighting system allowing color temperature to be adjusted without degrading luminance of white light. <P>SOLUTION: To an organic EL element 10a having a structure composed by stacking light-emitting elements 10-1, 10-2 and 10-3 having first electrode layers 2-1, 2-2 and 2-3 on substrates 1-1, 1-2 and 1-3, organic luminescent layers 3-1, 3-2 and 3-3 formed on upper layers of the first electrode layers 2-1, 2-2 and 2-3, and second electrode layers 4-1, 4-2 and 4-3 formed on upper layers of the organic luminescent layers 3-1, 3-2 and 3-3, a voltage application part 20a applies individual voltages 20-1, 20-2 and 20-3 to the light-emitting elements 10-1, 10-2 and 10-3 according to the respective luminescent colors (red, green and blue) of the stacked light-emitting elements 10-1, 10-2 and 10-3 to vary luminance of the respective colors. <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
