Kent State University Liquid Crystal Institute--Jack Kelly

Kelly received his Ph.D. (1979) in Physics from Clarkson University. He joined the Liquid Crystal Institute staff in 1988. He is an associate professor in the Chemical Physics graduate program within the LCI. He is the creator of the software package, "Twist Cell Optics." His research interests focus on modeling of display devices and physical properties of liquid crystals.

Publications in Refereed Journals
M. Lavrentovich, T. Sergan, J. Kelly, “Planar and Twisted Lyotropic Chromonic Liquid Crystal Cells as Optical Compensators for Twisted Nematic Displays,” Liq. Cryst. 30 (7), 851 (2003).

G. Panasyuk, J. Kelly, D. Allender, E. Gartland, “Geometrical Optics Approach in Liquid Crystal Films with Three Dimensional Director Variations,” Phys. Rev. E, 67, 041702 (2003).

O. Yaroshchuk, T. Sergan, J. Kelly, I. Gerus, "Spatial Anisotropy in Poly (vinylcinnamate) Films," Jpn. J. Appl. Phys. 41, 285-289 (2002).

T. Sergan, M. Lavrentovich, J. Kelly, E. Gardner, D. Hansen, “Measurement and Modeling of Optical Performance of Wire Grids and Liquid-Crystal Displays Utilizing Grid Polarizers,” JOSA A 19 (9), 1872 (2002).

O. Yaroschuk, T. Sergan, J. Lindau, S. Lee, J. Kelly, L.-C. Chien,"Light Induced Structures in Liquid Crystalline Side-Chain Polymers with Azobenzene Functional Groups," J. Chem. Phys. 114 (12), 5330 (2001).

O. Yaroschuk, T. Sergan, J. Lindau, S. Lee, J. Kelly, L.-C. Chien, "Light Induced Spatial Structures in Liquid Crystalline Azopolymers," Mol. Cryst. Liq. Cryst. 359, 301 (2001).

C. Bowley, A. Fontecchio, S. Danworaphong, G. Crawford, H. Yuan, J. Colegrove, J. Kelly “Improving the Voltage Response of Holographically Formed Polymer Dispersed Liquid Crystals (H-PDLCs)," Mol. Cryst. Liq. Cryst. 359, 301 (2001).

C.M. Titus, J.R. Kelly, E.C. Gartland, S.V. Shiyanovskii, J.A. Anderson, P.J. Bos, "Asymmetric Transmissive Behavior of Liquid-Crystal Diffraction Gratings," Opt. Lett. 26, 1188-1190 (2001).

T. Sergan, M. Sonpatki, J. Kelly, L.-C. Chien “Optical Characterization of Discotic Liquid Crystalline Films,” Mol. Cryst. Liq. Cryst. 359, 245 (2001).

T. Sergan, M. Sonpatki, J. Kelly, L.-C. Chien, “Polarizing Microscopy of a Chiral Discotic,” Mol. Cryst. Liq. Cryst. 359, 259 (2001).

W. Liu, J. Kelly “Optical Properties of a Switchable Diffraction Grating,” Mol. Cryst. Liq. Cryst. 359, 199 (2001).

G. Panasyuk, D. Allender, J. Kelly, “Approximate Description of the Two-Dimensional Director Field in a Liquid Crystal Display,” J. Appl. Phys. 89 (9), 4777 (2001).

T. Sergan, J. Kelly, "Negative Uniaxial Films from Lyotropic Liquid Crystalline Material for Liquid Crystal Display Applications," Liq. Cryst. 27 (11), 1481 (2000).

T. Sergan, T. Schneider, J. Kelly, O. Lavrentovich, "Polarizing Alignment Layers for Twisted Nematic Cells," Liq. Cryst. 27 (5), 567 (2000).

H. Mori, E.C. Gartland, J.R. Kelly, P. Bos, "Multidimensional Director Modeling Using the Q Tensor Representation in a Liquid Crystal Cell and its Application to the ? Cell with Patterned Electrodes," Jpn. J. Appl. Phys. 38, 135 (1999).

C. Titus, P. Bos, J. Kelly, E.C. Gartland, “Comparison of Analytical Calculations to Finite-Difference Time-Domain Simulations of One-Dimensional Spatially Varying Anisotropic Liquid Crystal Structures,” Jpn. J. Appl. Phys. 38, 1488 (1999).

W. Liu, J. Kelly, J. Chen “Electro-optical Performance of a Self-Compensating Vertically- Aligned Liquid Crystal Display Mode,” Jpn. J. Appl. Phys. 38, 2779 (1999).

J. Kelly, S. Jamal, M. Cui, “Simulation of the Dynamics of Twisted Nematic Devices Including Flow,” J. Appl. Phys. 86 (8), 4091 (1999).

M. Cui, J. Kelly, “Temperature Dependence of Visco-Elastic Properties of 5 CB,” Mol. Cryst. Liq. Cryst. 331, 49 (1999).

T. Sergan, S. Jamal, J. Kelly, "Polymer Negative Birefringence Films for Compensation of Twisted Nematic Devices," Displays 20, 259 (invited) (1999).

T. Sergan, W. Liu, J. Kelly, H. Yoshimi, "Achromatic Normally Black Twisted Nematic Device with Wide Viewing Angle," Jpn. J. Appl. Phys. 37, 889 (1998).

J. Kelly, P. Palffy-Muhoray, "Normal Modes of Director Fluctuations in a Nematic Droplet," Phys. Rev. E 55, 4378 (1997).

H. Yoshida, J. Kelly, "Light Behavior Analysis of Twisted Nematic Liquid Crystal Displays," Jpn. J. Appl. Phys. 36, 2116 (1997).

Degrees Bistable Twisted Nematic Liquid Crystal Display,” Jpn. J. Appl. Phys. 36 (2B), L227 (1997).

J. Li, J.R. Kelly, C. Hoke, P.J. Bos, "Optimization of Luminance for Optical-mode Interference (OMI) Displays," Journal of the SID 4 (2), 95 (1996).

J. Chen, P.J. Bos, D.L. Johnson, D.R. Bryant, J. Li, S.H. Jamal, J.R. Kelly, “Four-Domain Twisted Nematic Liquid Crystal Display Fabricated by Reverse Rubbed Polyimide Process,” J. Appl. Phys. 80 (4), 1985 (1996).

H. Lin, H. Ding, J.R. Kelly,"The Mechanism of Switching of Polymer Dispersed Liquid Crystal Film," Mol. Cryst. Liq. Cryst. 262, 99 (1995).

J.L. West, G.R. Magyar, J.R. Kelly, S. Kobayashi, Y. IImura, N. Yoshida,"Dichroic Ultra-Violet Absorption of Thin Liquid Crystal Films,” Appl. Phys. Lett. 67 (2), 155 (1995).

R. Herke, S. Jamal, J. Kelly, "Improved Representation of Polarizers for Liquid Crystal Display Modeling,” Journal of the SID 3 (1), 9 (1995).

J. Chien, P.J. Bos, D.R. Bryant, D.L. Johnson, S.H. Jamal, J.R. Kelly, "Simple Four-Domain Twisted Nematic Liquid Crystal Display," Appl. Phys. Lett. 67 (14), 1 (1995).

H.R. Fetterman, Y. Chang, D.C. Scott, S.R. Forrest, F.M. Espiau, M. Wu, D.V. Plant, J.R. Kelly, A. Mather, W.H. Steier, R.M. Osgood, Jr., H.A. Haus, G.J. Simonis. "Optically Controlled Phased Array Radar ReceiverUsing SLM Switched Real Time Delays," IEEE Microwave and Guided Wave Letters 5 (11), 414 (1995),

S. Jamal, J.R. Kelly, J.L. West, "Novel Technique for Achieving Dual-Domain Alignment in Twisted Nematic Liquid Crystal Display and Its Application," Jap. J. Appl. Phys., 34, L 1368 - L 1371 (1995).

J.R.Kelly, P. Palffy-Muhoray. "Optical Response of PDLC Films," Mol. Cryst. Liq. Cryst. 243, 11(invited) (1994).

P.Palffy-Muhoray, E.C.Gartland, J.R. Kelly "A New Configurational Transition in Inhomogeneous Nematics," Liquid Crystals 16, 713 (1994).

F.M. Aliev, J. Kelly "Dynamics, Structure, and Phase Transitions of Ferroelectric Liquid Crystal Confined in a Porous Matrix," Ferroelectrics, 151, 263 (1994).

Background image: Schlieren Texture of Nematic Phase
Copyright photo courtesy of Dr. Mary E. Neubert.