This invention relates to paper white cholesteric displays employing a reflective elliptical polarizer. The sensing array includes a red pixel, a green pixel, a blue pixel, a red and green pixel and a red and blue pixel configured to output a detected signal, respectively. Generally, the protuberances are created by a method comprising the steps of blowing blow-molding material against a molding surface with a cavity of a predetermined shape, so that the blow-molding material enters the cavity at a first end, and urging the blow-molding back toward the first end of the cavity by moving a piston of a predetermined shape.