A passivation layer solution composition is provided. The electrodes are connected to an amplifier for amplifying signals received from each of the electrodes, the amplifier having a shielding input and the shielding of the electrodes being connected to the shielded input of the amplifier. Permanent charges are embedded in the insulation region, sufficient to cause inversion in the insulation region. A driving circuit selectively supplies, to the counter electrode of each block, the voltage used for the liquid crystal display and the voltage used for the touch panel scanning.