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Details of Grant 

EPSRC Reference: GR/M69999/01
Title: NOVEL LIQUID CRYSTALS FOR PLLCD STRUCTURES USING DIRECT EMISSION GAS DISCHARGE SOURCES
Principal Investigator: Crossland, Professor WA
Other Investigators:
Davey, Dr AB Wilkinson, Professor T
Researcher Co-Investigators:
Project Partners:
Defence Science and Technology Laborator Screen Technology Ltd
Department: Engineering
Organisation: University of Cambridge
Scheme: Standard Research (Pre-FEC)
Starts: 01 October 1999 Ends: 31 March 2003 Value (£): 164,214
EPSRC Research Topic Classifications:
Materials Synthesis & Growth
EPSRC Industrial Sector Classifications:
Chemicals Aerospace, Defence and Marine
Electronics
Related Grants:
Panel History:  
Summary on Grant Application Form
Photoluminecent liquid crystal displays (PL-LCDs) have a novel architecture using liquid crystal shutters to control narrow band excitation light onto phosphors which emit light to the viewer. The aim of the project is to develop liquid crystal mixtures suitable for use in bright PL-LCD's applications that require illumination near 365nm. Such mixtures must be especially designed for long term transparency and stability at this wavelength as well as low switching voltages, low melting points, high nematic clearing point and low viscosity. Appropriate elastic and dielectric constants are required to allow suitable voltage thresholds for high duty multiplexing and/or greyscale performance depending on the application. The birefrengence must be as large as possible, consistent with photochemical stability, in order that the cell thickness can be minimised. Two new PL-LCD structures are proposed:a) A full colour projection display using a 'point source' 365 lamp;b) A simplified, cost-reduced, and improved version of the conventional flat panel PL-LCD structure using direct emission low pressure discharge tubes. The performances of the two target PL-LCDs will be simulazed by computer programme in order to obtain an insight into the new PL-LCD's operation and hence develop target material properties. Finally the two PL-LCD structures with developed LC mixtures will be demonstrated.
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Organisation Website: http://www.cam.ac.uk