175210 ⎘
Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells; Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements; Constructional arrangements; Manufacturing methods Plasma addressed liquid crystal cells [PALC]