Title :
A high-resolution and high-speed ferroelectric liquid-crystal shutter array print head
Author :
Chieu, Trieu C. ; Sanford, James L. ; Yang, Kei-Hsiung
Author_Institution :
IBM Thomas J. Watson Res. Center, Yorktown Heights, NY, USA
fDate :
6/1/1991 12:00:00 AM
Abstract :
A 1-in-wide, 577-dot/in, and 4:1 multiplex ferroelectric-liquid-crystal (FLC) shutter array has been fabricated and tested for optical performance. The array has a cell gap of 2.8 μm and is surface stabilized with an FLC material of high spontaneous polarization (140 nC/cm2) and fast switching time (16 μs) at room temperature. It is capable of operating at a speed of 6.5 in/s (24 p.p.m. printing speed) with optical contrast ratios of better than 4. Using tungsten-halogen illumination, a prototype print head has been made, and print samples have been obtained on an electrophotographic printer engine
Keywords :
ferroelectric liquid crystals; liquid crystal devices; printers; 1 in; 16 mus; 165.1 mm/s; 2.8 micron; W halogen lamp; cell gap; contrast ratios; design issues; electrophotographic printer engine; fast switching time; ferroelectric liquid-crystal shutter array print head; high-resolution; high-speed; multiplexed shutter array; optical performance; printing speed; prototype print head; spontaneous polarization; Ferroelectric materials; High speed optical techniques; Lighting; Optical arrays; Optical materials; Optical polarization; Printing; Prototypes; Temperature; Testing;
Journal_Title :
Electron Devices, IEEE Transactions on
