1. Color-temperature tunable white reflector using bichiral liquid crystal films
- Author
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HA, NA YOUNG, Ha, Na Young, Jeong, Soon Moon, Nishimura, S, and TAKEZOE, HIDEO
- Subjects
Materials science ,business.industry ,Cholesteric liquid crystal ,Temperature ,Color ,Standard illuminant ,Equipment Design ,Color temperature ,Atomic and Molecular Physics, and Optics ,law.invention ,Liquid Crystals ,Equipment Failure Analysis ,Photometry ,Optics ,Liquid crystal ,law ,OLED ,Optoelectronics ,business ,Refractive index ,Light-emitting diode ,Photonic crystal ,Lenses - Abstract
We have demonstrated multicolored reflections showing various whitish colors from a bichiral liquid crystal (LC) film. The bichiral LC film was fabricated by using left-handed and right-handed polymeric cholesteric liquid crystal (CLC) films with two different helical pitches and an isotropic polymer film in between. Color temperatures of the multiple reflections are controlled from ~4000 K to ~10000 K by changing linear polarization directions of normally incident and reflected lights. This characteristic can extend practical applications of CLCs to illuminant devices.
- Published
- 2010