SEMICONDUCTOR-CHIP CONTROL APPARATUS AND CONTROL METHOD AND IMAGE RECORDING APPARATUS AND ITS CONTROL METHOD

摘要

To prevent an electrical short due to ion movement in a semiconductor chip and improve the reliability. In a predetermined period T2 in which light-emitting or transfer operation is not performed by light-emitting elements, control signals phi1, phi2, phiI, and phiS and a signal phim of a negative-electrode-side power-supply input unit are set to a potential or high-impedance state same as that of a positive-electrode-side power-supply input unit.