Novel magnetic switch for active-matrix liquid-crystal displays

Gary Spletter

doi:10.1117/12.60346

1 July 1992 Novel magnetic switch for active-matrix liquid-crystal displays

Gary Spletter

Proceedings Volume 1664, High-Resolution Displays and Projection Systems; (1992) https://doi.org/10.1117/12.60346
Event: SPIE/IS&T 1992 Symposium on Electronic Imaging: Science and Technology, 1992, San Jose, CA, United States

Abstract

An innovative switch for Active Matrix Liquid Crystal Displays (AM-LCD) is presented. The switch, referred to as MAG-LCD, replaces thin film transistors (TFTs) for large flat panel display screens. The manufacturing process for MAG-LCD is less stringent than that for TFTs. MAG-LCD is manufactured from a nickel/iron magnetic alloy which can be deposited at temperatures less than 150 degree(s)C. The NiFe is deposited by ion assisted electron beam evaporation and etched by standard photolithographic means. The switch uses the properties of resonant LRC circuits to control the voltage across the plates of the liquid crystal capacitor. When the circuit is tuned to resonance, it has a Q in excess of 4. When the circuit is out of resonance the Q is less than 1, limiting the capacitor voltage to less than the liquid crystal threshold voltage.

Citation Download Citation

Gary Spletter "Novel magnetic switch for active-matrix liquid-crystal displays", Proc. SPIE 1664, High-Resolution Displays and Projection Systems, (1 July 1992); https://doi.org/10.1117/12.60346

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