Bistable FLCOS devices for doubled‐brightness micro‐projectors

— Optical output is of paramount importance to emerging ultra-miniature projector products. Experimental bistable ferroelectric liquid-crystal-on-silicon (FLCOS) projection microdisplay devices using newly developed FLC materials aligned on obliquely deposited SiO2 have been developed. These devices enable the doubling of the illumination duty cycle, and hence doubling of the achievable projector light output, while maintaining a DC-balanced electrical drive.

[1]  P. Bos,et al.  Anchoring transitions of liquid crystals on SiO x , 2008 .

[2]  John L. Janning Thin film surface orientation for liquid crystals , 1972 .

[3]  E. Guyon,et al.  Alignment of nematics and smectics on evaporated films , 1974 .

[4]  Temperature induced anchoring transition in nematic liquid crystals with two-fold degenerate alignment , 1997 .

[5]  Mark A. Handschy,et al.  9.5L: Late-News Paper: Scalable Sequential-Color Display Without ASICs , 2007 .

[6]  William N. Thurmes,et al.  18.2: Bistable FLCOS Devices for Doubled‐Brightness Micro‐Projectors , 2008 .

[7]  Ferroelectric liquid crystal aligned on SiO2 thin films using ion‐beam deposition , 2007 .

[8]  A method for director alignment of SmC devices , 1988 .

[9]  G. Durand,et al.  SiO Evaporated Films Topography and Nematic Liquid Crystal Orientation , 1997 .

[10]  Philip J. Bos,et al.  5.4: A Defect Free Bistable C1 SSFLC Display , 2002 .

[11]  H. Takezoe,et al.  Smectic Layer Structure of Thin Ferroelectric Liquid Crystal Cells Aligned by SiO Oblique Evaporation Technique , 1988 .

[12]  Kei-Hsiung Yang,et al.  29.4: Homeotropic Alignment by Single Oblique Evaporation of SiO2 and Its Application to High Resolution Microdisplays , 2000 .

[13]  L.A. Goodman,et al.  Topography of obliquely evaporated silicon oxide films and its effect on liquid-crystal orientation , 1977, IEEE Transactions on Electron Devices.

[14]  Layer and director structure in surface stabilized ferroelectric liquid crystal cells with non-planar boundary conditions , 1989 .

[15]  Philip J. Bos,et al.  Defect-free bistable C1 surface stabilized ferroelectric liquid crystal display , 2004 .

[16]  Tatsuo Uchida,et al.  Liquid Crystal Orientation on the Surface of Obliquely-Evaporated Silicon Monoxide with Homeotropic Surface Treatment , 1980 .

[17]  H. Inoue,et al.  High resolution, large area flc display with high graphic performance , 1991 .

[18]  Katsumi Kondo,et al.  Smectic C* Chevron Layer Structure Studied by X-Ray Diffraction , 1988 .

[19]  Martin Copic,et al.  Effect of spontaneous polarization and polar surface anchoring on the director and layer structure in surface-stabilized ferroelectric liquid crystal cells. , 2003, Physical review. E, Statistical, nonlinear, and soft matter physics.

[20]  A 1″ × 0.5″ FLC bar-graph display with short-term memory , 1988 .