Abstract: A signal conversion apparatus allows long distance transmission while suppressing cross talk between adjacent signal lines and the introduction of external noise, even when signals are transmitted at a high rate. The signal conversion apparatus is interposed between an image signal source for outputting in image signal and a display apparatus for displaying an image in accordance with the image signal and includes a first conversion unit for converting an unbalanced signal supplied from the image signal source to a balanced signal, and a second conversion unit for converting the balanced signal outputted by the first conversion unit and outputting it to the display apparatus.

Abstract: A display control apparatus permits display by a single display control apparatus on a plurality of display devices which receive image data by an internal synchronization signal. The display control apparatus outputs input image data to a plurality of display devices and includes a control circuit for selecting the longest one of the internal synchronization signals from the display devices and a unit for supplying the image data to the display devices in synchronism with the selected synchronization signal.

Abstract: A technique for driving a liquid crystal apparatus having an effective display area and a non-display unit area is provided. When a bistable liquid crystal element is used, a voltage must be continuously applied to the non-display unit area to maintain a uniform white or black display state. Durability of the non-display unit is particularly desired. In this invention, the non-display unit includes first and second stripe electrodes disposed perpendicular to each other. First and second drive bipolar pulses are respectively applied to the first and second stripe electrodes with a phase difference between these bipolar pulses.

Abstract: A display control apparatus includes a frame memory for storing first frame video data on CRT image signals at least for one frame portion, a storage device for comparing the first frame video data with displaying pixel data at the same image position in video data for a subsequent frame to identify changes in the display contents on a per pixel basis and for storing address information of the changed pixels on a per pixel or per scanning line basis. Also included is a transfer device for reading displaying pixel data from the frame memory on a per pixel or per scanning line basis, based on the address information, and for transferring the data to a display driving unit of the liquid crystal display device. With this display control apparatus, a highly precise flickerless image display is implemented without any dispersion.