Field sequential color ferroelectric liquid crystal display cell

US9366934B2 · kind B2 · utility

Assignee

• The Hong Kong University of Science and Technology

Inventors

• Abhishek Srivastava · Bengaluru, IN
• Ying Ma · Shanghai, CN
• Vladimir Grigorievich Chigrinov · Kowloon, CN
• Hoi Sing Kwok · Kowloon, CN

Key dates

• Filing date: Nov 1, 2013
• Grant date: Jun 14, 2016
• Expiry date: Jan 10, 2034

Classification

• Technology area (CPC G): Physics
• CPC primary: G09G2310/0235
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

A field sequential color (FSC) ferroelectric liquid crystal (FLC) display cell, part of an FSC display, is provided. The FSC FLC display cell includes: two polarizers; an FLC layer, positioned between the two polarizers, the FLC layer comprising FLCs with helix pitch less than the thickness of the FLC layer; and a voltage source, configured to apply an electrical driving voltage to the FLC layer, the electrical driving voltage applied to the FLC layer having an amplitude greater than a threshold voltage for helix unwinding, and wherein the voltage source is further configured to apply electrical driving voltages to light emitting diodes (LEDs) of the FSC display to illuminate pixels of the FSC display. The pixels are illuminated in an FSC manner. The FLC layer is configured to provide a defect-free layer of FLC under the electrical driving voltage applied to the FLC layer.