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Journal of Display Technology

Journal of Display Technology

| A JOINT IEEE/OSA PUBLICATION

  • Vol. 8, Iss. 11 — Nov. 1, 2012
  • pp: 669–677

Gray Scales by Cross Pairing of Select and Data Voltages in Multi-Line Addressed Liquid Crystal Displays

Shashanka Ubaru and Temkar N. Ruckmongathan

Journal of Display Technology, Vol. 8, Issue 11, pp. 669-677 (2012)


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Abstract

The idea of cross pairing of select and data voltages in line-by-line addressing is extended for multi-line addressing; to display a large number of gray scales with a small number of time intervals as compared to successive approximation technique. The method is illustrated by selecting two rows at a time with waveforms based on Hadamard matrix.

© 2012 IEEE

Citation
Shashanka Ubaru and Temkar N. Ruckmongathan, "Gray Scales by Cross Pairing of Select and Data Voltages in Multi-Line Addressed Liquid Crystal Displays," J. Display Technol. 8, 669-677 (2012)
http://www.opticsinfobase.org/jdt/abstract.cfm?URI=jdt-8-11-669


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References

  1. T. N. Ruckmongathan, "Gray scales by cross pairing of select and data voltages in liquid crystal displays," Proc. Soc. Inf. Display Symp. Dig. (SID'11) (2011) pp. 1326-1329.
  2. T. N. Ruckmongathan, "Cross pairing of select and data voltages to display gray scales in liquid crystal displays," J. Display Technol. 7, 633-635 (2011).
  3. T. N. Ruckmongathan, "A successive approximation technique for displaying gray shades in liquid crystal displays (LCDs)," IEEE Trans. Image Process. 16, 554-561 (2007).
  4. K. G. Panikumar, T. N. Ruckmongathan, "Displaying gray shades in passive matrix LCDs, using successive approximation," Proc. 7th Asian Symp. on Inf. Display (ASID2002) (2002) pp. 229-232.
  5. T. N. Ruckmongathan, A. R. Shashidhara, "Sparse orthogonal matrices for scanning liquid crystal displays," J. Display Technol. 1, 240-247 (2005).
  6. T. N. Ruckmongathan, "Orthogonal matrices for multi-line addressing," J. Display Technol. 4, 6-8 (2008).
  7. J. E. Bigelow, R. A. Kashnow, C. R. Stein, "Contrast optimization in matrix-addressed liquid crystal displays," IEEE Trans. Electron Devices ED-22, 22-24 (1975).

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