High voltage multichannel waveform generator for liquid crystal research

Matuszczyk, Tomasz and Beccherelli, Romeo (2000) High voltage multichannel waveform generator for liquid crystal research. Review of scientific instruments , 71 (2). pp. 563-566. ISSN 0034-6748

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Abstract

The article describes a wave form generator designed primarily for experiments on addressing all kinds of liquid crystal displays. It can also be used in any application requiring several simultaneous sources of high-voltage arbitrary pulse trains. The instrument has eight channels capable of pulse amplitudes of +- 100 V at a slew rate better than 300 V/ms. Its design differs significantly from a typical arbitrary wave form generator. First and foremost the wave forms are directly constructed from pulses with variable width as well as amplitude. Two interchangeable memory banks guarantee transient-free adjustments of generated wave forms. The generator is computer controlled with well integrated software and provides all functionality to assist in the creation of wave forms and experiments with liquid crystal addressing schemes in a straightforward and intuitive way. To point out its versatility we discuss a new mode of operation intended primarily for generation of analogue gray shades on a surface-stabilized ferroelectric liquid crystal display. The instrument creates conditions corresponding to driving a display of virtually any size with image frames changing at video rate.

Item Type: Article
Subjects: 600 Tecnologia - Scienze applicate > 620 Ingegneria e attivita' affini > 621 Fisica applicata; Ingegneria meccanica > 621.3 Ingegneria elettrotecnica; Illuminazione; Superconduttivita'; Ingegneria magnetica; Ottica applicata; Tecnologia parafotica; Elettronica; Ingegneria delle comunicazioni; Elaboratori
Depositing User: Chiara D'Arpa
Date Deposited: 08 Mar 2013 15:55
Last Modified: 08 Mar 2013 15:55
URI: http://eprints.bice.rm.cnr.it/id/eprint/4534

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