Izvestiya of Saratov University.

Physics

ISSN 1817-3020 (Print)
ISSN 2542-193X (Online)

For citation:

Simonenko G. V. Аngular optical characteristics of a standard twist indicator with a phase compensator. Izvestiya of Saratov University. Physics , 2022, vol. 22, iss. 2, pp. 149-157. DOI: 10.18500/1817-3020-2022-22-2-149-157, EDN: JRWDQA

This is an open access article distributed under the terms of Creative Commons Attribution 4.0 International License (CC-BY 4.0).
Published online: 
30.06.2022
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Language: 
Russian
Heading: 
Optics and spectroscopy. Laser physics
Article type: 
Article
UDC: 
535.361:610.849.19:618.723
DOI: 
10.18500/1817-3020-2022-22-2-149-157
EDN: 
JRWDQA

Аngular optical characteristics of a standard twist indicator with a phase compensator

Autors: 
Simonenko Georgy Valentinovich, Saratov State University
Abstract: 

Background and Objectives: One of the disadvantages of a liquid crystal display device for information on the twist effect is its relatively narrow viewing angle. In this regard, an urgent task is to find ways to increase the viewing angle of such a device. Materials and Methods: Based on the computer simulation method, an original and simple design of a liquid crystal twist indicator with a phase compensator, which has improved angular optical characteristics, is proposed. Results: The design has a sandwich structure and consists of an input polarizer, a classic liquid crystal twist cell, a phase compensator and an output polarizer arranged in series one after another. The phase compensator consists of two identical uniaxial anisotropic films, the optical axes of which form an angle of 90°. Computer modeling made it possible to find the optimal design of this device, which, unlike other designs, has a wider viewing angle. It has been found that for each LC material there is an optimal set of design parameters of the device (orientation angle and phase compensator thickness) and there is a linear relationship between the thickness of the LC liquid crystal layer and the thickness of the phase compensator, at which the total viewing angle is maximum. In addition, a relationship has been found between the control voltage and the total viewing angle of the device. Conclusion: The proposed original design of a liquid crystal information display device based on the twist effect with a phase compensator can serve as the basis for the production of simple and technological liquid crystal displays with a wide viewing angle. 

Key words: 
computer simulation
liquid crystal display
angular characteristics
Acknowledgments: 
The author expresses his sincere gratitude to the senior researcher of the Institute of Physics of the SSU named after N. G. Chernyshevsky Ph.D. – m.s. Dmitry A. Yakovlev for valuable and constructive criticism of the results and for providing literature data.
Reference: 

 

  1. He Z., Gou F., Chen R., Yin K., Zhan T., Wu S.-T. Liquid Crystal Beam Steering Devices : Principles, Recent Advances, and Future Developments. Crystals, 2019, vol. 9, no. 6, pp. 292–300. https://doi.org/10.3390/cryst9060292
  2. Wang C. T., Yang C. S., Guo Q. Liquid crystal optics and physics : Recent advances and prospects. Crystals, 2019, vol. 9, no. 12, pp. 670. https://doi.org/10.3390/cryst9120670
  3. Belyaev V. V. Promising applications and technologies of liquid crystal display devices and photonics. Liq. Cryst. and their Appl., 2015, vol. 15, no. 3, pp. 7–27. (in Russian). https://doi.org/10.18083/LCAppl.2015.3.7
  4. Belyaev V. V., Ostrovsky B. I., Pikina E. S. The 14th European Conference on Liquid Crystals (ECLC 2017), June 25–30, 2017, Moscow. Liq. Cryst. and their Appl., 2018, vol. 18, no. 1, pp. 84–94 (in Russian) https://doi.org/10.18083/LCAppl.2018.1.84
  5. Gennes P. G. de. Phizika zhidkikh kristallov [The Physics of Liquid Crystal]. Moscow, Mir Publ., 1977. 404 p. (in Russian).
  6. Qi Guo, Kexin Yan, Vladimir Chigrinov, Huijie Zhao, Michael Tribelsky. Ferroelectric Liquid Crystals : Physics and Applications. Crystals, 2019, vol. 9, no. 9, pp. 470–492. https://doi.org/10.3390/cryst9090470
  7. Yang Deng-Ke, Wu Shin-Tson. Fundamentals of Liquid Crystal Devices. John Wiley & Sons Ltd, The Atrium, Southern Gate, Chichester, 2006. 378 р.
  8. Yakovlev Dmitry A., Chigrinov Vladimir G., Kwok Hoi-Sing. Modeling and Optimization of LCD Optical Performance. John Wiley & Sons Ltd, The Atrium, Southern Gate, Chichester, 2015. 554 р.
  9. Sukharier A. S. Zhidkokristallicheskie indikatory [Liquid Crystal Indicators]. Moscow, Radio i svyaz Publ., 1991. 256 p. (in Russian).
  10. Kang Chihtsung, Hai Bo. Liquid crystal display and method of optical compensation therefor WO 2015/003371 A1, Essen Patent & Trademark Agency, Chine.
  11. Komoto Sogo. Viewing angle expansion film, polarizing plate, and liquid crystal display device US 2018 / 0173045 A1.
  12. Chigrinov V. G., Kozenkov V. M., Kwok H. S. Photoalignment of Liquid Crystalline Materials. Physics and Applications. Series in Display Technologies. Willey, 2008. 248 p.
  13. Odarchenko Yaroslav, Defaux Matthieu, Rosenthal Martin, Akhkiamova Azaliia, Bovsunovskaya Polina, Melnikov Alexey, Rodygin Alexander, Rychkov Andrey, Gerasimov Kirill, Anokhin Denis V., Zhu Xiaomin, Ivanov Dimitri A. One Methylene Group in the Side Chain Can Alter by 90 Degrees the Orientation of a MainChain Liquid Crystal on a Unidirectional Substrate. ACS Macro Lett., 2018, vol. 7, no. 4, pp. 453–458. https://doi.org/10.1021/acsmacrolett.8b00044
  14. Samarin A. V. Technology of LC displays with controlled viewing angle. Components and Technologies, 2008, no. 8, pp. 15–22 (in Russian).
  15. Pankove J. I., ed. Display Devices. Berlin, SpringerVerlag, 1980. 316 p.
  16. Chigrinov V. G., Simonenko G. V., Yakovlev D. A., Tsoy V. I., Khokhlov N. A., Podyachev Yu. B. Universal complex of computer programs for optimizing the design of liquid crystal displays. Informatika. Ser. Sredstva otobrazheniya informatsii [Informatics. Ser. Means of Information Display]. VNII interindustry information, 1993, no. 2, pp. 90–94 (in Russian).
  17. Finkel A. G., Tsoi V. I., Simonenko G. V., Yakovlev D. A. Designing LCD-devices for displaying information. Electronic Industry, 2000, no. 2, pp. 11–16 (in Russian).
  18. Chigrinov V. G., Simonenko G. V., Yakovlev D. A., Podjachev Yu. B. The optimization of LCD electrooptical behavior using MOUSE – LCD software. Mol. Cryst. Liq. Cryst., 2000, vol. 351, pp. 17–25. https://doi.org/10.1080/10587250008023248
  19. Kurchatkin S. P. Surface phenomena and structure of thermotropic liquid crystals in capillary volumes. Diss. Dr. Sci. (Phys.). Saratov, 2001. 290 p. (in Russian).
  20. Born Max, Wolf Emil. Principles of Optics. London, Pergamon press, 1964. 854 р. (Russ. ed. : Moscow, Nauka Publ., 1970. 856 p.).
  21. Sergan T. A., Lavrentovich M. D., Kelly J. R., Kameyama T. Application of commercially available liquid crystal polymer films for the improvement of color and viewing angle performance of twisted nematic devices. Japanese Journal of Applied Physics, 2010, vol. 49, no. 6, article no. 061702. https://doi.org/10.1143/JJAP.49.061702
Received: 
30.03.2022
Accepted: 
06.05.2022
Published: 
30.06.2022
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