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Titolo:
MATRIX ADDRESSING WAVE-FORMS FOR GREY SHADES SSFLC DISPLAYS
Autore:
FERRARA V; BECCHERELLI R; CAMPOLI F; DALESSANDRO A; GALLOPPA A; GALBATO A; MALTESE P;
Indirizzi:
UNIV ROMA LA SAPIENZA,DEPT ELECT ENGN ROME ITALY NATL INST PHYS MATTER ROME ITALY
Titolo Testata:
Molecular crystals and liquid crystals science and technology. Section A, Molecular crystals and liquid crystals
, volume: 304, anno: 1997,
pagine: 363 - 370
SICI:
1058-725X(1997)304:<363:MAWFGS>2.0.ZU;2-0
Fonte:
ISI
Lingua:
ENG
Soggetto:
LIQUID-CRYSTAL CELLS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
12
Recensione:
Indirizzi per estratti:
Citazione:
V. Ferrara et al., "MATRIX ADDRESSING WAVE-FORMS FOR GREY SHADES SSFLC DISPLAYS", Molecular crystals and liquid crystals science and technology. Section A, Molecular crystals and liquid crystals, 304, 1997, pp. 363-370

Abstract

To produce analog grey shades in our special construction SSFLC matrix display, different ''low voltage'', ''stopped writing'' and ''hampered writing'' addressing waveforms have been tested in computer simulations and experiments. Three phenomena limit the achievable results: the first is addressing hysteresis, subject of our previous paper, the second is the crosstalk from data intended for other pixels, the third is characteristic switching pulse area variations due to cell temperature or thickness variations. We present here computer simulations of the two latter effects, for a range of different addressing modes. For the faster addressing modes, based on liquid crystal dielectric biaxiality, data waveforms are necessary featuring constant rms voltage, de balance and crosstalk compensation. New technique are here introduced making use of such data waveforms in place of the previous ones, basedon amplitude or pulse-position modulation.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 27/11/20 alle ore 02:25:28