3m Innovative Properties Company

Erich C Walter

Ralph R Roberts

Brian T Weber

Patrick M Campbell

Eileen M Haus

Kao Vang

A gray scale drive scheme for passive matrix displays, more specifically cholesteric liquid crystal displays. Prior to writing an image, the display can be given a black appearance by first driving the pixels to a homeotropic state, then driving the pixels to a focal conic state. The drive scheme then resets pixels by driving the selected pixels to a homeotropic state. Selecting and non-selecting row voltage signals are then used in combination with column voltage signals to write an image to the display.

Fast transitions of large area cholesteric displays

An electrode that includes a transparent substrate having a first and second surface; a conductive layer disposed on the second surface of the substrate; and an electrode layer disposed on the conductive layer, wherein the electrode layer includes doped tin oxide nanoparticles and an organic binder, and wherein the electrode layer is transparent. Also disclosed is a method of making such an electrode and electrochromic articles including such an electrode.

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Woodbury, MN, United States of America

Erich C Walter