Accurate color predictability based on a spectral retardance model of a twisted-nematic liquid-crystal display |
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| Authors: | José Luis Martínez Pascuala García-Martínez María del Mar Sánchez-López Ignacio Moreno |
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| Institution: | 1. Departamento de Ciencia de Materiales, Óptica y Tecnología Electrónica, Universidad Miguel Hernández, 03202 Elche, Spain;2. Departamento de Óptica, Universitat de València, C/Dr. Moliner 50, 46100 Burjassot, Spain;3. Instituto de Bioingeniería, Universidad Miguel Hernández, 03202 Elche, Spain;1. AMTC, Advanced Mining Technology Center and DIMin, Mining Engineering Department, University of Chile, Chile;2. Institute of Multidisciplinary Research for Advanced Materials (IMRAM), Tohoku University, Sendai 980-8577, Japan;3. National Academy of Science of Ukraine, Frantsevich Institute for Problems of Materials Science, 3 Krzhyzhanivsky Str., Kyiv 03680, Ukraine;4. National Academy of Science of Ukraine, Physico-Technological Institute of Metals and Alloys, 34/1 Vernadsky Ave., Kyiv 142 03680, Ukraine;1. Centre for Industrial Management, Department of Mechanical Engineering, KU Leuven, Belgium;2. University of Cuenca, Ecuador;3. Department of Mechanical Engineering, Graduate School of Engineering, Osaka University, Japan;1. Associate Professor, Department of Dentistry, School of Medicine, University of Salamanca, Salamanca, Spain;2. Associate Professor, Department of Orofacial Prosthesis, University Complutense of Madrid, Madrid, Spain;3. Tenured Lecturer of Prosthodontics, Department of Orofacial Prosthesis, University Complutense of Madrid, Madrid, Spain;4. Tenured Lecturer of Prosthodontics, Department of Orofacial Prosthesis, University Complutense of Madrid, Madrid, Spain;1. Department of Radiology, Staten Island University Hospital, Staten Island, New York;2. Department of Medical Imaging, University of Arizona, Tucson, Arizona;3. Department of Radiology, Henry Ford Health Systems, Detroit, Michigan |
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| Abstract: | In this work we present the application of a simple physical model to accurately predict the broadband spectral transmittance and colorimetric properties of a twisted-nematic liquid crystal display (TNLCD). We spectroscopically calibrate the retardance parameters to evaluate the spectrum of the light transmitted by a TNLCD sandwiched between two linear polarizers. When the TNLCD is illuminated with a broadband light source, the full spectrum can be predicted as a function of the addressed gray level for any arbitrary orientation of the polarizers. Thus, the color of the transmitted light can be also be estimated with very good accuracy. As an example, a polarizers' configuration is shown that yields, without using color filters, a relatively large color gamut compared to the standard configuration. Experimental results confirming the validity of such predictions are presented, both on the measured spectral responses as well as on the trajectories at different chromatic diagrams. |
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