Bistable Cholesteric Reflective Display

Yang DK (2005) Flexible bistable cholesteric reflective displays. J Display Technol 2 32-37... 

D.-K. Yang, X.Y. Huang, and Y.-M. Zhu, Bistable cholesteric reflective displays material and drive schemes. Annual Review of Materials Science, 27, 117 (1996). 

B. Taheri, J.W. Doane, D. Davis, and W.D. St John, Optical properties of bistable cholesteric reflective displays, SID Digest 96, 39-42 (1996). 

J. Gandhi, D.-K. Yang, X.-Y. Huang and N. Mfller, Gray scale drive schemes for bistable cholesteric reflective displays, Asia Display 98, 127 130 (1998). 

Wu, S.-T., Yang, D.-K. Reflective Liquid Crystal Displays. Wiley, New York (2001) Yang, D.-K., Huang, X.-Y., Zhu, Y.-M. Bistable cholesteric reflective displays materials and drive schemes. Annu. Rev. Mater. Sci. 27, 117-146 (1997)... 

The state of a cholesteric liquid crystal is mainly determined by smface anchoring, cell thickness, and apphed fields. The hquid crystal can be switched from one state to another by applying electric fields. There are many possible transitions among the states, as shown in Figure 10.24 [50,54]. In order to design drive schemes for the bistable Ch reflective display. 

In bistable Ch reflective display applications, it is desirable that the threshold of the transition from the planar state to the focal conic state be high, so that the cholesteric liquid crystal can remain in the planar state and the display does not exhibit flicker under colimin voltage in addressing. 

R.Q. Ma and D.-K. Yang, Polymer stabilized bistable black-white cholesteric reflective display, SID Inti. Symp. Digest Tech. Papers, 28, 101 (1997). 

Reflective Bistable Cholesteric/Polymer Dispersion Display... 

Kim, Y.C., et al. 1999. Reflective bistable cholesteric/polymer dispersion display with a black polypyrrole electrode cast from the solution. Mol CrystLiq Cryst 327 157. 

D.-K. Yang, J.L. West, L.-C. Chien, J.W. Doane, Control of reflectivity and bistability in displays using cholesteric liquid-ciystals. J. Appl. Phys. 76, 1331-1333 (1994)... 

As discussed in previous sections, cholesteric liquid crystals exhibit two bistable states at zero field the reflecting planar state and the non-reflective focal conic state. They can be used to make multiplexed displays on passive matrices. In this section, we consider the drive schemes for the bistable Ch displays. 

X.-Y. Huang, D.-K Yang, P. Bos, and J. W. Doane, Dynamic drive for bistable reflective cholesteric displays a rapid addressing scheme, SID Inti. Symp.Digest Tech. Papers, 26, 347 (1995). 

X-Y. Huang, D.-K. Yang, and J.W. Doane, Transient dielectric study of bistable reflective cholesteric displays and design of rapid drive scheme, Appl. Phys. Lett. 69, 1211 (1995). 

H. Yuan, Bistable reflective cholesteric displays, in Liquid Crystals in Complex Geometries Formed by Polymer and Porous Networks (edited by G.P. Crawford and S. Zumer), Taylor and Francis, London, 1996, pp. 265-280. 

X.-Y. Huang, N. Miller, and J.W. Doane, Unipolar implementation for the dynamic drive scheme of bistable reflective cholesteric displays, SID Digest 97, 899-902 (1997). 

J. Gandhi and D.-K. Yang, Temperature compensation of the dynamic drive scheme for bistable reflective cholesteric displays, SID Digest 98, 794-797 (1998). 

---