1. Efficient polarization converter for projection displays
2. Broadband quarter-wave film device including in combination a chromatic half-wave film and a TN-LC polymeric film;Zhu Xinyu;U.S. Patent No. 6,922,221,2005
3. L-3: Late-News Paper: Extremely Broadband Retardation Films;Kwok Hoi-Sing;SID Symposium Digest of Technical Papers,2007
4. Achromatic quarter-wave films;Huang Yuhua;U.S. Patent No. 7,009,670,2006
5. Broadband quarter-wave film device including in combination a chromatic half-wave film and a TN-LC polymeric film;Zhu Xinyu;U.S. Patent No. 6,922,221,2005