Abstract: A color display device comprises a blue color emitting light source consisting of a blue color emitting fluorescent lamp or a white color emitting fluorescent lamp attached with a blue color filter, and a liquid crystal panel for controlling the transmission of the blue color light for every pixel, wherein one end of every optical fiber provided for every pixel is fixed to a position on a fiber board where every blue color signal for every pixel passing through said liquid crystal panel can be incident, and the other end thereof is fixed to a corresponding position on a printed board on which a red color emitting LED and a green color emitting LED are mounted for every pixel, to have a full-color display by controlling the drive of said red color emitting LED, green color emitting LED and liquid crystal panel.

Abstract: A ferroelectric liquid crystal panel comprising 2 layers of liquid crystal cells, each of which comprises a ferroelectric crystal sealed between two substrates and then is laminated together; wherein one of said liquid crystal cells is operated as a panel driving liquid crystal cell and the other of said liquid crystal cells is operated as an optical compensating cell, while both said liquid crystal cells being driven by rectangular wave AC signals. Furthermore, the ferroelectric liquid crystal panel is constructed to operate in an intermediate tone by varying the phases of said rectangular wave AC signals applied to the liquid crystal cells of the first and second layers.