A liquid crystal display device including a color filter is disclosed in the present invention. The multilayer structure includes an active layer 16 that produces emission and multiple semiconductor layers 12, 14 and 15 that have been stacked one upon the other between the active layer 16 and the substrate 10 and that include an n-type dopant. Accordingly, by sequentially increasing the input power for initial heating of the heating lamps, flickering and harmonic characteristics of a display device can be reduced, and by setting the duty level values to supply the maximum input power within a certain time, an initial heating time of the heating lamps can be minimized. A second oxide layer having a second thickness overlies the low voltage region. The combinational pads are connected by the connecting portions to form a structure which can be unfolded flatly; and are folded closely together to form a structural body surrounded by the structural surfaces; and are combined securely by the corresponding limiting structures. The bag can also have a closure system comprising a non-reusable closure and a reusable closure.