High Performance Paper White- and Full-Color Reflective Displays
Final rept. 13 Sep 1996-12 Jun 1999
DPIX PALO ALTO CA
Pagination or Media Count:
This report documents work performed by a team led by dpiX LLC to develop fabrication technology for a paper-white, video-rate, full-color reflective display technology based on holographically formed polymer dispersed liquid crystal HPDLC displays. The fabrication of HPDLC devices was optimized with numerous controlled experiments and simulations. Proper materials selection in combination with fabrication process improvements enabled achievement of high peak reflectance and increased spectral reflectance bandwidth, which, together, yielded dramatic improvements in photopic reflectance. A novel method was proposed and tested to fabricate and model off-axis diffusely reflecting HPDLC cells with extended viewing angles. A method of stacking multiple HPDLC films between a single set of substrates was demonstrated, which allowed fabrication of white devices with increased photopic reflectance and broader reflective bandwidths. It was also demonstrated that HPDLC mirrors can be integrated into an electronic color image acquisition system to enhance color performance and decrease cost of video cameras.