This paper reviews advances made in the state of the art of twisted nematic field effect liquid crystal displays from an automotive designer point of view. The extension of glass frit sealing techniques to larger displays and the advent of polarizing films that are able to maintain efficiency after prolonged exposure to heat and humidity have contributed to the displays' long term life and reliability. Likewise the development of liquid crystal fluids capable of operating over a wide temperature range results in performance features which are close to automotive requirements. Finally the paper discusses some multiplex drive techniques using currently available drive circuits. The intent is to show practical methods of reducing pin count without serious loss of performance.
Abstract