P‐32: Design of an Integrated Low‐Power High‐Voltage Driver for Bistable Displays

Abstract

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.

P‐38: Integrated Low‐Power High‐Voltage Driver for Bistable Nematic Displays

“…The high-voltage generators are built around a capacitive charge pump based on the Dickson architecture [3]. Dimensioning for the charge pump was done, based on formulas derived in [2] en [4].…”

“…We have already demonstrated the design and implementation of simple but completely integrated capacitor-based high-voltage generators [1] [2]. In this article we will describe how we took the design one step further by combining high-voltage generators, high-voltage multiplexers and low-voltage digital control logic on one chip to accomplish a completely integrated driver chip, suited for driving a 5-digit 7-segment bi-stable display and allowing full programmability of the driving scheme for both timing and voltage levels.…”