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Mechanical deformation of water‐swollen polyelectrolyte gels with carboxylic groups induces a spontaneous ionization, which in turn produces an electrical potential as large as a few millivolts. On the base of this phenomenon, a tactile sensor capable of lighting a photo diode array according to the amplitude of deformation has been made. This system may offer a soft and wet touch‐sensor due to its soft tissue‐like rheological characteristics.

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In this paper, we studied the influence of alignment materials on image sticking in IPS‐LCDs and clarified that there were two factors attributed to volume resistivity and surface anchoring energy on alignment materials. From these results, we have developed an image sticking‐free novel alignment material for IPS‐LCD.