A 24-digit multiplexed liquid-crystal display working in dynamic deformation mode

Matrix driving of a liquid-crystal transmissive display panel in a dynamic deformation mode is described. In this mode, a very thin homeotropic layer of negative dielectric anisotropy liquid crystal is placed between crossed polarizers. In addition, suitable selection electric-field pulses and modulation waveforms are applied to the liquid crystal in such a way that the alignment is deformed by and let relax between the pulses at a rate high enough to avoid flickering. A 24-digit display making use of a liquid-crystal layer of 3 µm ±10- percent thickness was built and operated in multiplex mode using a single 7-segrnent decoder and 24 digit-selection drivers. Quickly changing images together with good viewing angle, contrast, and efficiency have been obtained.