We already designed and demonstrated working samples of fully integrated and programmable 30V and 55V capacitor‐based high‐voltage generators for bistable display drivers. This paper discusses the design of a fully integrated bistable display driver that includes the programmable high‐voltage generators, integrated high‐voltage multiplexers for pixel addressing and digital logic for I/O communication and programming drive schemes. The driver was designed for driving a 5‐digit 7‐segment bistable nematic (BiNem™) display in a (contactless) smart card.
This paper focuses on the design of an integrated high‐voltage HV driver chip for bi‐stable LCDs. First of all, the design of HV generators, based on the Dickson charge pump is discussed. A short summary of the most important simulation results is given. Subsequently, the paper describes the design of integrated HV multiplexers for switching the HV outputs of the generators to the pixel electrodes. Finally, the implementation of the design in a prototype chip, together with measurement results are mentioned and the paper is concluded with some thoughts on future improvements and possible applications.
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