Patent ID: 8599470

Claim:
A suspended particle device comprising: a pair of substrates disposed to face each other; a suspension filled between the pair of substrates, containing a disperse medium and charged particles having optical anisotropy; and an electrode pair formed on the suspension side of one of the pair of substrates; wherein the suspended particle device is configured to enable the application of a DC voltage across the electrode pair; wherein the suspension and the charged particles are configured such that when the DC voltage is applied across the electrode pair, the charged particles in the suspension localize at an area near one of the electrodes of the electrode pair, thereby performing light control; wherein the suspended particle device is configured to enable the application of an AC voltage across the electrode pair, subsequent to the application of the DC voltage; wherein the suspension and the charged particles are configured such that when the AC voltage is applied across the electrode pair, subsequent to the application of the DC voltage, the charged particles localized at an area near the one of the electrodes of the electrode pair reorient in a common direction, while maintaining the localized area of the charged particles.