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Journal of Display Technology

Journal of Display Technology


  • Vol. 8, Iss. 7 — Jul. 1, 2012
  • pp: 401–404

A Pico Projection System With Electrically Tunable Optical Zoom Ratio Adopting Two Liquid Crystal Lenses

Yi-Hsin Lin and Ming-Syuan Chen

Journal of Display Technology, Vol. 8, Issue 7, pp. 401-404 (2012)

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A pico projection system with electrically tunable optical zoom ratio adopting two liquid crystal (LC) lenses is first demonstrated. The projected image of the system is not only continuously focused, but also zoomed simultaneously by adjusting the focal lengths of LC lenses electrically. The related optical principle is discussed and a liquid-crystal-on-silicon (LCOS)-based pico projection system was used to demonstrate the designed concept. This study opens a new window in realizing pico projectors with electrically tunable optical zooms.

© 2012 IEEE

Yi-Hsin Lin and Ming-Syuan Chen, "A Pico Projection System With Electrically Tunable Optical Zoom Ratio Adopting Two Liquid Crystal Lenses," J. Display Technol. 8, 401-404 (2012)

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  1. D. Armitage, I. Underwood, S. T. Wu, Introduction to Microdisplays (Wiley, 2006).
  2. E. H. Stupp, M. S. Brennesholtz, Projection Display (Wiley, 1999).
  3. J. W. Pan, S. H. Tu, C. M. Wang, J. Y. Chang, "High efficiency pocket-size projector with a compact projection lens and a light emitting diode-based light source system," Appl. Opt. 47, 3406-3414 (2008).
  4. H. C. Lin, Y. H. Lin, "An electrically tunable focusing pico- projector adopting a liquid crystal lens," J. Jpn. Appl. Phys. 49, (2010).
  5. H. C. Lin, M. S. Chen, Y. H. Lin, "A review of electrically tunable focusing liquid crystal lenses," Trans. Elect. Electron. Mater. 12, 234-240 (2011).
  6. Y. H. Fan, H. Ren, X. Liang, H. Wang, S. T. Wu, "Liquid crystal microlens arrays with switchable positive and negative focal lengths," J. Display Technol. 1, 151-156 (2005).
  7. B. Wang, M. Ye, S. Sato, "Liquid crystal lens with focal length variable from negative to positive values," IEEE Photon. Technol. Lett. 18, 79-81 (2006).
  8. M. Ye, B. Wang, S. Sato, "Liquid-crystal lens with a focal length that is variable in a wide range," Appl. Opt. 43, 6407-6412 (2004).
  9. H. C. Lin, Y. H. Lin, "A fast response and large electrically tunable-focusing imaging system based on switching of two modes of a liquid crystal lens," Appl. Phys. Lett. 97, (2010).
  10. Y. H. Lin, M. S. Chen, H. C. Lin, "An electrically tunable optical zoom system using two composite liquid crystal lenses with a large zoom ratio," Opt. Express 19, 4714-4721 (2011).
  11. M. Ye, S. Sato, "New method of voltage application for improving response time of a liquid crystal lens," Mol. Cryst. Liq. Cryst. 433, 229-236 (2005).
  12. M. Ye, B. Wang, M. Kawamura, S. Sato, "Fast switching between negative and positive power of liquid crystal lens," Electron. Lett. 43, 474-476 (2007).

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