<p>An active matrix type display device comprising: a substrate; a plurality of source signal lines and a plurality of gate signal lines formed over the substrate; a plurality of pixel TFTs formed over the substrate; a plurality of pixel electrodes electrically connected to said plurality of pixel TFTs; a shielding film (black matrix) formed over said substrate wherein said shielding film is floating; and a dielectric interposed between said pixel electrodes and said shielding film, wherein signals whose polarity is inverted per each of said plurality of source signal lines are applied to said source signal lines and the polarity of said signal applied to the respective one of said plurality of source signal lines is inverted per one frame period. It is preferable to form a coupling capacitor between the shielding film and a common electrode. <IMAGE></p>
