349 / | HD | LIQUID CRYSTAL CELLS, ELEMENTS AND SYSTEMS |
56 | DF | PARTICULAR STRUCTURE {7} |
74 | .~ Interconnection of plural cells in series {2} | |
75 | DF | .~.~> For compensation of birefringence effects {1} |
77 | DF | .~.~> With particular cooperation between cells (e.g., alternating selection or simultaneous selection of cells) {4} |