Journal of Electrical and Electronic Materials

Regular Paper : Optical Compensation of IPS-LCD for Symmetric-High-Contrast at Off-Axis Oblique View: Tae Hyeon Kim, Bong Sik Kim, Woo Sang Park; J Korean Inst Electr Electron Mater Eng 2016;29(3):175-180. Published online March 1, 2016; DOI: https://doi.org/10.4313/JKEM.2016.29.3.175

Abstract
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In this study, we proposed an optical compensation method to improve the symmetricity of contrast ratio for wide viewing angle IPS (in-plane switching) LCD. First, the phase retardation depending on the thickness of compensation film is calculated, and then the phase change is presented at the Poincare sphere. The phase retardation and the polarization state of the light passing through the optical elements are caculated by using the EJMM (extended Jones matrix method). In addition, the transmittance and the contrast countour are also calculated by using the Berremann``s 4x4 matrix method. The simulation is carried out for a IPS LC cell with positive A/C/A compensation film. From the standard deviation of the contrast ratio, we confirmed the symmetricity at each viewing angle is inversely proportional to the standard deviation and calculated the optimum design condition of the uniaxial compensation film for the IPS LCD.

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Response Characteristics of Charged Particle Type Display: Dong Jin Lee, Young Cho Kim; J Korean Inst Electr Electron Mater Eng 2009;22(2):169-173. Published online February 1, 2009; DOI: https://doi.org/10.4313/JKEM.2009.22.2.169

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Reflectivity Improvement by Particle Neutralization in a Charged Particle-Type Electronic Display
Young-Cho Kim
Transactions on Electrical and Electronic Materials.2013; 14(1): 36. CrossRef