Display-device research and development in Japan

Current work on display devices in Japan is surveyed. Work on plasma display panels includes several methods for producing gray scale on ac-driven bistable panels, a technique for moving the display on an ac-driven panel, and new types of plasma display panels. Development on several types of alphanumeric displays, including both new and older types, is summarized. Work on light-emitting diodes includes new fabrication techniques and new types of devices. The liquid-crystal work described includes addressing techniques, color modulators, and light-addressed light valves. A new cathodochromic display tube, a high-frequency oscilloscope tube, and an electroluminescent display panel are mentioned.