Electronic display with semitransparent back layer

摘要

An electronic display includes electrically conductive layers. An active layer is disposed between adjacent electrically conductive layers. The active layer includes cholesteric liquid crystal material. At least one transparent front substrate is disposed adjacent one of the electrically conductive layers near a front of the display. A semitransparent back layer absorbs light that passes through the active layer, reflects grey light or light of a color and is light transmitting. Electronic circuitry applies a voltage to the conductive layers that enables at least one of erasing or writing of the active layer.

主权项

1. An electronic display comprising:
electrically conductive layers; an active layer disposed between adjacent said conductive layers, said active layer including cholesteric liquid crystal material; at least one transparent front substrate disposed adjacent one of said electrically conductive layers near a front of said display; a semitransparent back layer that absorbs light that passes through said active layer, reflects grey light or light of a color and is light transmitting; a back pattern disposed behind said semitransparent back layer, wherein said back pattern is visible through said semitransparent back layer; and
electronic circuitry for applying a voltage to said conductive layers that enables at least one of erasing or writing of said active layer.