DOI QR코드

DOI QR Code

Generation of Disclination Line Dependent on Liquid Crystal′s Rubbing Direction and Voltage Driving Method in Microdisplays

마이크로디스플레이의 액정 러빙 방향과 전압 인가 방식에 따른 Disclination Line의 생성

  • 정태봉 (전북대학교 신소재공학부) ;
  • 송제훈 (전북대학교 신소재공학) ;
  • 오세태 (전북대학교 신소재공학) ;
  • 이승희 (전북대학교 신소재공학부)
  • Published : 2004.06.01

Abstract

We have studied how liquid crystal's rubbing direction and voltage driving method affect generation of disclination line. At first, generation of disclination line in vertical alignment(VA) cell and VA-twisted nematic(TN) cell has been examined. When liquid crystal's rubbing direction of bottom substrate was 0$^{\circ}$, the degree of generated disclination line was the smallest value. Further, the generation of disclination line above the electrode is less in the frame inversion than in the line inversion. Secondly, we have examined a generation of disclination line in reflective fringe-field switching cell. When the distance between common electrodes is over 3 ${\mu}{\textrm}{m}$ with on-state of one pixel and off-state of neighboring pixels, the reflectance appears only on-state pixel without generating reflectance in adjacent pixels.

References

  1. C. Chinnock, 'Microdisplay industry-The year in review', Microdisplay 2001, p. 71. 2001
  2. Y. Ji, J. Gandhi, and M. E. Stefanove, 'Fringe-field effects in reflective CMOS LCD design optimization', SID'99 digest paper, p. 750, 1999
  3. H. T. Kanagawa, F. A. Kanagawa, K. U. kanagawa, 'Liquid crystal display apparatus using switching devices and a manufacturing the same', Pub. No.: US2001/0040660 A1, 2001
  4. K-H. F. Chiang, S. T. Wu, and S. H. Chen, 'Fringing field effect of the Liquid-Crystal- on-Silicon Devices', Jpn, J. Appl. Phys., Vol. 41, No. 7A, p. 4577, 2002 https://doi.org/10.1143/JJAP.41.4577
  5. F. J. Kahn, 'Recent trends in electronic projection', IDW'00 Digest paper, p. 1037, 2000
  6. W-Y. Chou, C H. Hsu, S-W. Change, H-C. Chiang, and T-Y. Ho, 'A novel design to eliminate fringe field effects for liquid crystal on silicon', Jpn. J. Appl. Phys., Vol. 41, No. 12, p. 7386, 2002 https://doi.org/10.1143/JJAP.41.7386
  7. T. B. Jung, S. T. Oh, and S. H. Lee, 'Liquid-Crystal-on-silicon 소자에서 액정의 프리틸트각에 따른 Disclination line 발생', 전기전자재료학회논문지, 16권, 4호, p. 322, 2003
  8. T. B. Jung, C. H. Park, J. M. Rhee, Y. B. Kim, and S. H. Lee, '1매의 편광판으로 구성된 반사형 Fringe-field switching mode의 전기 광학 특성', 16권, 2호, p. 131, 2003
  9. T. B. Jung, S. H. Lee, 'Fringe-field 구동형 새로운 반투과형 수평 배향 액정 디스플레이', 16권, 6호, p. 501, 2003
  10. A. Lien, 'Extended Jones matrix representation for twisted nematic liquid crystal display at oblique incidence', Appl. Phys. Lett., Vol. 57, No. 26, p. 2767, 1990 https://doi.org/10.1063/1.103781
  11. S. H. Lee, private communication