Abstract
The polymer-dispersed liquid crystal (PDLC) films of the optically addressed light valves in the high-definition television (HDTV) projection display described here can modulate unpolarized light with high spatial resolution as well as with a high optical efficiency based on the light scattering effect. A PDLC film suitable for use in HDTV projection display was developed by evaluating the microscopic spatial light modulation and polymer-network morphological properties of test films prepared using various curing conditions for photopolymerization-induced phase separation (i.e., various liquid crystal concentrations and ultraviolet exposure intensities). Films produced under optimum curing conditions (low concentration and high intensity) have a fine polymer-network structure appropriate for films used in the light valves of a HDTV projection display. Our prototype full-color HDTV projection display using three PDLC light valves provides a resolution of 850 TV lines, a brightness greater than 1800 ANSI lumens, and a maximum contrast ratio of 100:1.
| Original language | English |
|---|---|
| Pages (from-to) | 180-188 |
| Number of pages | 9 |
| Journal | Proceedings of SPIE - The International Society for Optical Engineering |
| Volume | 3634 |
| Publication status | Published - 1999 Jan 1 |
| Externally published | Yes |
| Event | Proceedings of the 1999 Projection Displays V - San Jose, CA, USA Duration: 1999 Jan 26 → 1999 Jan 28 |
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Computer Science Applications
- Applied Mathematics
- Electrical and Electronic Engineering