An exemplary backlight module includes a light guide plate, a light source, and a retardation layer. Applications include simple business analysis as well as advanced engineering and science, and provide numerical solution for simultaneous spatially-manipulated interactive equations. The first segment may be coupled to the shaft. 5% of a direct dye; and an aqueous carrier. The number of blades each have a number of cutting edges that run parallel to a blade ring axis, and which enclose a working chamber. Inactive periods are detected according to criteria involving an adaptively adjusted step size and a quantized difference signal, both of which are obtained in the decoding process.