Journal of Information Display

The Korean Infomation Display Society (한국정보디스플레이학회)
권호 표지

Improved Human Factors of Electroluminescent Displays using Optical Interference Effect

  • Krasnov, Alexey N. (Luxell Technologies Inc.) ;
  • Kim, Woo-Young (Luxell Technologies Inc.)
  • Published : 2003.06.24
Download PDF
⟨ Previous Next ⟩

Abstract

We discuss main techniques to improve legibility of electroluminescent displays. Emphasis is placed on use of destructive optical interference to cancel ambient light reflected from the back electrode of the device. Basic optical principles and material composition of the optical interference contrast-enhancing stack (CES) are presented. We also describe the improved human factors of electroluminescent devices assisted with a CES. Achromatic contrast is the most important contributor to display's legibility. In some conditions color contrast may also be important. Contributing to both luminance and color contrast enhancement, the contrast-enhancing stack may play an important role in various display applications.

Keywords

References

  1. N.A. Vlasenko and Y.A. Popkov, Optics & Spectroscopy 8, 39 (1960)
  2. T. Inoguchi, SID digest. (1974) P. 84
  3. C.W. Tang and S.A. VanSlyke, Appl. Phys. Lett. 51, 913 (1987) https://doi.org/10.1063/1.98799
  4. J.H. Burroughes, D.D.C. Bradley, A.R. Brown, R.N. Marks, K. Mackay, R.H. Friend, P.L. Burns, and A.B. Holmes, Nature 347, 539 (1990) https://doi.org/10.1038/347539a0
  5. R. Friend, J. Burroughes, and T. Shimoda, Physics World 6 (1999), p. 35
  6. A.N. Krasnov and P.G. Hofstra, Prog. Cryst. Growth & Char. Mat., 42, 65 (2001) https://doi.org/10.1016/S0960-8974(01)00003-1
  7. A.N. Krasnov, Prog. Cryst. Growth & Char. Mat., 37, 123 (1998) https://doi.org/10.1016/S0960-8974(99)00003-0
  8. H. Tang, F. Li, and J. Shinar, Appl. Phys. Lett. 71, 2560 (1997) https://doi.org/10.1063/1.119325
  9. M.E. Thompson, S.R. Forrest, P. Burrows, US Patent No. 5,986,401
  10. A. Smakula, German Patent No. 685,767
  11. S. Bennett and G. Trapani, Displays 159,4 (1984)
  12. M.S. Weaver, Information Display 5/6, 26 (2001)
  13. D. Carkner, Information Display, 13, 10 (1997)
  14. J. Heikenfeld, private communication
  15. H. Aziz, Y.-F. Liew, Z.D. Popovic, N.-X. Hu, Nan-Xing, and A.J. Paine, US Patent Apptication No. 20,020,180,349
  16. M. Takeda, H. Kishishita, H. Kawabata, and K. Isaka, US Patent No. 4,287,449
  17. M.P.R. Panicker and S.K. Tiku, Thin Solid Films 123, 19 (1985) https://doi.org/10.1016/0040-6090(85)90037-9
  18. G.N. Steele and E.J. Soxman, US Patent No. 3,560,784
  19. R.A. Budzilek, D.L. Monarchie, E. Schlam, and R.R. Swatson, US PatentNo. 5,521,465
  20. E.R. Dickey, US Patent No. 5,504,389
  21. J.A. Dobrowolski, B.T. Sullivan, and R.C. Bajcar, US Patent No. 5,049,780
  22. P.G. Hofstra and A.N. Krasnov, US Patent No. 6,411,019
  23. A. Thelen, Design of Optical Interference Coatings, (MacMillan Publishing Co., New York, 1986), p. 52
  24. O.S. Heavens, Optical Properties of Thin Solid Films, (Dover Publications, New York, 1965), p. 25
  25. J.A. Dobrowolski, B.T. Sullivan, and R.C. Bajcar, Appl. Opt. 31,5988 (1992) https://doi.org/10.1364/AO.31.005988
  26. E. Schabowska and R. Scigala, Thin Solid Films 135, 149 (1986) https://doi.org/10.1016/0040-6090(86)90121-5
  27. A.N. Krasnov, Appl. Phys. Lett. 80, 3853 (2002) https://doi.org/10.1063/1.1480473
  28. A.N. Krasnov, Information Display 18, 18 (2002)
  29. A.N. Krasnov, Appl. Phys. Lett. 80, 3853 (2002) https://doi.org/10.1063/1.1480473
  30. H.L. Snyder, in: Flat-Panel Displays and CRTs, (ed. L.E. Tannas, Jr., Van Nostrand Reinhold, New York, 1985)Since Tang and Van Slyke have developed organic electroluminescent devices (OELDs) [1], many efforts have been made to improve the device efficiency [2-4]The device efficiency is highly G. Greczynski, W. R. Salaneck, and M. Fahlman, Appl. Surface Science 175-176, 319 (2001) https://doi.org/10.1016/S0169-4332(01)00135-0