Abstract: A back lighted liquid crystal display including a light converging assembly, a light-guiding plate, a reflecting plate, and a diffusing plate integrally welded together outside of the display area and a display having a housing configuration where horizontal and vertical integrated circuit driver chips are mounted on respective adjacent peripheral edge portions of a glass plate member of a liquid crystal panel and where an illuminating lamp is mounted for easy removal on an opposite edge from the edge portions where the driver chips are located.

Abstract: A liquid crystal display including a sheet for converging light from a back light source. The sheet may be an array of truncated prisms, an array of prisms separated by flat portions, asymmetrical prisms with dual vertices, or prisms with different vertices.

Abstract: An apparatus for superimposing an image represented in a predetermined dot arrangement on a video signal. The apparatus includes an inputting device, a memory, a storage block selecting device and a signal switching circuit. The memory has an arrangement of a plurality of storage blocks, each of which includes an arrangement of a plurality of unit storage cells each for storing one bit. The inputting device inputs externally prepared binary signals. The storage block selecting device selects a predetermined storage block for every inputted bit information. All the unit storage cells in the selected storage block store the inputted bit information. The signal switching device sequentially reads the contents stored in each unit storage cell in synchronization with a video signal, switches the video signal and a predetermined superimposing video signal to each other in accordance with the contents and outputs the same.