Thin-film video scanner and driver circuit for solid-state flat-panel displays

A thin-film scanner circuit which greatly reduces the number of external lead connections to a large-area flat-panel display, while at the same time providing both the scanning (addressing) function and the video driver function, has been successfully fabricated. The circuit, which can handle both TV (analog) and alphanumeric (digital) type video, also performs line storage so that the incoming serial video can be presented to the display panel in line-at-a-time fashion Vacuum-deposited CdSe thin-film transistors (TFT's), operating in a digital switching mode, are used in conjunction with thin-film storage capacitors to convert the input video into 112 parallel output video columns. Measurements of actual circuit parameters indicate that the scanner can easily operate at real-time TV rates.