Site: FUJITSU

Date Visited: October 9, 1991

Report Author: W. Doane

ATTENDEES

JTEC:

Doane
Thompson
Uyehara

HOST:

Toshiaki Narusawa

Manager, Organic Materials Lab.

Akihiro Mochizuki

Researcher, Organic Materials Lab.

Shigeo Kasahara

Researcher, Organic Materials Lab.

Katsusada Motoyoshi

Researcher, Organic Materials Lab.

Scientists from flat-panel display (STN & AM) of Fujitsu were not present. Mr. Mochizuki explained that Fujitsu's STN program was very much behind others in Japan. The presentation was conducted by Mr. Mochizuki (a doctoral student of Kobayashi).

PRESENTATION OF CH/N PHASE-CHANGE HD PROJECTOR

Figure Fujitsu.1.

Figure Fujitsu.2

COMMENTS ON FLC

  1. 30 micro sec response is needed for 1000 lines for video rates.
  2. Now they obtain 120 msec for 28 V drive and 70 micro sec higher drive voltage.
  3. There is a problem using TFT AM because the aperture is smaller; too small for bright projection.
  4. Fujitsu can obtain stable bookshelf surface structure, which is more stable against mechanical shock (tapping display on table does not destroy it) but bending or stress on substrate destroys surface. He believes Canon uses an air support suspension system to prevent shock damage.
  5. Fujitsu has a material which has wide S(subscript A) temperature range and a temperature- independent inner layer spacing to stabilize surface alignment and create the bookshelf structure.
  6. The sequence is I - S(subscript A) - S(subscript C) monotropic nematic.
  7. Mochizuki claims that the key to surface stabilization is a S(subscript C) material with a large range S(subscript A) and one in which the layer spacing does not vary much with temperature.
  8. Their work was reported at Boulder, CO, meeting in June, 1991. The tilt angle is temperature-dependent and maximizes at approximately 20 degrees.
  9. Constant layer spacing (temp-independence) causes bookshelf structure.
  10. Their S(subscript C) material is a naphthaline, which they add to a Merck mixture.

Fujitsu FLC Prototypes

They showed us a photo (B & W) in memory state - nice.

They showed us a reflection display - nice. Cell has 80% transmission without polarizer/analyzer

GENERAL QUESTIONS BY THE TEAM

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FINAL COMMENT BY MOCHIZUKI

Our host commented politely that the antidumping laws could hamper cooperativeness between U.S. and Japanese display developers.

REFERENCES

  1. Fujitsu brochure on research & development laboratories.
  2. Fujitsu Limited Annual Report, March 1991.
  3. Brochure: "Launchpad of Tomorrow's Microtechnologies," Fujitsu's Atsugi Laboratories.
  4. "Zigzag Defect Free Alignment and Good Bistability of Surface Stabilized Scsuperscript *) Cells," Ferroelectrics, 113, 353-359 (1991), A. Mochizuki, M. Hirose, and M. Nakatsuka.
  5. "Elimination of Crosstalk in Highly Multiplexed STN-LCDs by Using Conducting Orientation Films," Proceedings of the SID, 31, 327-332 (1990), A. Mochizuki, T. Yoshihara, Y. Yoneda, K. Motoyoshi, and S. Kobayashi.
  6. "Electro-Optical Switching of Bookshelf Layer Structure Sc(superscript*) Cells Aligned with a Rubber Polymer Film," Proceedings of the SID, 31, 123-128 (1990), A. Mochizuki, T. Yoshihara, M. Iwasaki, M. Nakatsuka, Y. Takanishi, Y. Ouchi, H. Takezoe, and A. Fukuda.
  7. "A 1120 x 768 Pixel Four-Color Double-Layer Liquid-Crystal Projection Display," Proceedings of the SID, 31, 155-161 (1990), A. Mochizuki, T. Yoshihara, M. Iwasaki, Y. Yamagishi, Y. Koike, M. Haraguchi, and Y. Kaneko.
  8. "Electro-Optical Switching of Bookshelf Layer Structure Ferroelectric Liquid- Crystal," Fujitsu Scientific and Technical Journal, 27, 233-242 (1991), A. Mochizuki, M. Nakatsuka, and Y. Takanishi.
  9. "A Ferroelectric Layer in a Cell Containing a Polar Molecular Mixture in Nematic and Isotropic Phases," Japanese Journal of Applied Physics, 29, L1898-L1900 (1990), A. Mochizuki, K. Motoyoshi, and S. Kobayashi.
  10. "Second-Harmonic Generation from an Interfacial Layer between Orientational Films and Liquid Crystal Layers of Nematic Liquid Crystal Cell," Japanese Journal of Applied Physics, 30, L504-L506 (1991), A. Mochizuki, W. Sotoyama, S. Tatsuura, T. Ishitsuka, K. Motoyoshi, and S. Kobayashi.

Published: June 1992; WTEC Hyper- Librarian