ELECTROPHORETIC LIGHT MODULATOR

摘要

For obtaining a light modulator (1) for modulating light which can be addressed without the need for an active or passive matrix and in which it is relatively easy to realize a light transmissive mode of operation, the light modulator (1) has a light modulating element (2) having a light outcoupling surface (91) for coupling out the modulated light, an electrophoretic medium (5) comprising charged particles (6), an optical state depending on a position of the particles (6), an element (17) being able to be addressed by an output of an energy source for allowing a movement of the particles (6) to their position for modulating the light as a consequence of an electric field applied to the light modulating element (2). In one aspect, the applied electric field and the medium (5) are arranged for the movement to have a component in a plane parallel to the light outcoupling surface (91). In another aspect, a colour filter is used to reduce the sensitivity of the element to ambient light.