Guest-host active matrix liquid-crystal display using high-voltage polysilicon thin-film transistors

The construction and addressing of an experimental 30*30 actively addressed guest-host (G-H) liquid-crystal display (LCD) driven by polysilicon-based thin-film transistors (TFTs) is described. The design features are similar to those of high-quality, nonactive matrix addressed G-H displays used in a...

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Bibliographic Details
Published in:IEEE transactions on electron devices 1991-08, Vol.38 (8), p.1781-1786
Main Authors: Proano, R.E., Misage, R.S., Jones, D., Ast, D.G.
Format: Article
Language:English
Subjects:
Active matrix addressing
Active matrix liquid crystal displays
Active matrix technology
Aerospace electronics
Applied sciences
Display
Electronics
Exact sciences and technology
Liquid crystal displays
Optical polarization
Optical scattering
Silicon
Thin film transistors
Voltage
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Summary:The construction and addressing of an experimental 30*30 actively addressed guest-host (G-H) liquid-crystal display (LCD) driven by polysilicon-based thin-film transistors (TFTs) is described. The design features are similar to those of high-quality, nonactive matrix addressed G-H displays used in avionics. The driving voltage is 23 V, resulting in a peak load of 46 V across the TFTs during polarity reversals. The triple-gated TFTs exhibited subnanoampere leakage currents at 40 V and mobilities, corrected for dopant diffusion under the gate, of 72 cm/sup 2//V-s for electrons and 40 cm/sup 2//V-s for holes. Because no polarizers are used, the display has a 180 degrees viewing angle and is highly readable in reflective-, transmissive-, and mixed-mode operations.< >
ISSN:0018-9383
1557-9646
DOI:10.1109/16.119014