Abstract: A double-layered type while/black super-twisted liquid crystal display device including a driving cell and a compensating cell in a layered structure wherein a substrate having no optical anisotropy is interposed between the driving cell and the compensating cell and a heater is arranged on the substrate is disclosed. The heater is composed of two electric conductive films, one of them being deposited on one surface of the substrate and the other one being deposited on the opposite surface of the same. In addition, a liquid crystal display device of the foregoing type wherein a heater comprising a single electric conductive thin film is interposed between the driving cell and the compensating cell is disclosed. Each thin film constituting the heater is deposited by employing a vaporizing process. Alternatively, each thin film constituting the heater may be deposited by employing a spattering process.

Abstract: A method for driving an STN liquid crystal display device, which can prevent a printed phenomenon of display on an image plane. In this method, when a display time of a fixed pattern exceeds a set time, ON and OFF of the fixed pattern is forcibly reversed to momentarily provide an inverted pattern, after which the display is returned to the original fixed pattern.