Patent ID: 6407726
Filing Date: 2002-06-18
Classification: G09G,H04N

Abstract:
A method for driving a display device including display elements having discrete fixed pixels driven by signals obtained by sampling video signals in each video field and wobbling elements for wobbling a light beam emitted from said display elements, comprising the steps of:passing a light beam representing a sampled video signal from a light source through each display element and producing a linearly polarized light beam; applying the linearly polarized light beam emitted by each display element to a respective wobbling element; forming each said wobbling element using a phase modulation optical element, a first birefringent medium, a half-wave plate, a second birefringent medium disposed sequentially; controlling said phase modulation element during a first field of said video signal, so as to impart no time shift caused by phase modulation; rotating a polarization plane of a light beam having passed said first birefringent medium by 90 degrees by said half-wave plate to be led to said second birefringent medium; performing pixel shifts in the vertical direction by an amount &Dgr;Ly and in the horizontal direction by an amount &Dgr;Lx independently of each other by said first birefringent medium and said second birefringent medium; controlling said phase modulation element during a second field of said video signal so as to impart a time shift at corresponding to an amount of the pixel shift &Dgr;Lx that was performed on the first field; whereby said step of performing pixel shifts is disabled for the second field, and performing again said step of rotating.