| 摘要 |
PURPOSE: An LED lighting device and a control method thereof are provided to obtain uniformity of property of LED devices by minutely adjusting color temperature of the LED devices according to user's preference. CONSTITUTION: A plurality of unit cells(322) respectively comprises a unit variable color filter(321). The plurality of unit cells is divided by a partition wall. The unit variable color filter selectively transmits or blocks light of a specific wavelength band. The unit variable color filter comprises a hydrophobic dielectric part(240), a polar liquid(260), a non-polar liquid(270), and driving parts(220, 250, 280). The polar liquid and the non-polar liquid have different transmission spectra property. The driving parts selectively apply a voltage to the hydrophobic dielectric part. |
