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Development of electrophoretic display with high reflectivity and high contrast

Research Project

Project/Area Number 13555109
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section展開研究
Research Field 電子デバイス・機器工学
Research InstitutionKYUSHU UNIVERSITY (2001-2002, 2004)
The University of Tokyo (2003)

Principal Investigator

HATTORI Reiji  KYUSHU UNIVERSITY, Department of Electronics, Graduate School of Information Science and Electrical Engineering, Associate Professor, 大学院・システム情報科学研究院, 助教授 (60221503)

Co-Investigator(Kenkyū-buntansha) KUROKI Yukinori  KYUSHU UNIVERSITY, Department of Electronics, Graduate School of Information Science and Electrical Engineering, Professor, 大学院・システム情報科学研究院, 教授 (40234596)
池田 晃裕  九州大学, システム情報科学研究院, 助手 (60315124)
Project Period (FY) 2001 – 2004
Project Status Completed (Fiscal Year 2004)
Budget Amount *help
¥11,100,000 (Direct Cost: ¥11,100,000)
Fiscal Year 2004: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 2003: ¥1,100,000 (Direct Cost: ¥1,100,000)
Fiscal Year 2002: ¥1,400,000 (Direct Cost: ¥1,400,000)
Fiscal Year 2001: ¥7,800,000 (Direct Cost: ¥7,800,000)
KeywordsElectrophoretic Display / Bistable / Driver circuit / Electrophoretic particle / Surfactant / Titania / マイクロレンズアレー
Research Abstract

We have been worked on the development of reflective-type display which is brighter than the existing reflective-type LCD due to its higher reflectivity and enable to show a full color images. To achieve that, we worked on the development of electrophoretic display (EPD) in the first year of this program, but recently the display superior to the EPD was presented. The new display can operate 100 times faster than EPD. Therefore to improved our display performance we investigated a new principle of reflective-type display, which is based on the subtractive color process.
1)Design of Capillary
We've designed the optimized device structure with small capillary using the fluidic simulator produced by Coventer Co. to have a clear threshold voltage. As the result, without the special switching device it was found that the device can be driven by matrix addressing. Furthermore, we designed the single pixel device to confirm the operation based on this new principle.
2)Fabrication and estimation of the single pixel device
According to the design, we fabricated the single pixel device with micro capillary structure. During the estimation of this device we found the problem of electrode durability. Therefore we developed the new electrode fabrication process using the salt bridge made of the photo-hardening polymer.
3)Fabrication of driving circuit
This display must be driven by high voltage more than 100 V. Therefore we designed and develop the high voltage driver LSI.
4)We optimized the solution which is used for the subtractive color process. This solution must have high zeta potential in the capillary to achieve a high response. We achieved it by coating the capillary with polysilasane layer which composed of SiO2.

Report

(5 results)
  • 2004 Annual Research Report   Final Research Report Summary
  • 2003 Annual Research Report
  • 2002 Annual Research Report
  • 2001 Annual Research Report
  • Research Products

    (7 results)

All 2002 2001 2000 Other

All Journal Article (4 results) Publications (3 results)

  • [Journal Article] Electrophoretic Display for high refractivity and contrast2002

    • Author(s)
      R.Hattori, Y.Harada, K.Hirata
    • Journal Title

      Technical Report of IEICE Vol.101, No.600, EID2001-117

      Pages: 97-102

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Microlense-Array Electrophoretic Display2002

    • Author(s)
      Y.Harada, S.Yamada, R.Hattori
    • Journal Title

      Technical Report of IEICE Vol.101, No.600, EID2001-117

      Pages: 97-102

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] マイクロレンズアレイ電気泳動ディスプレイの開発2001

    • Author(s)
      原田 善弘, 山田 修平, 服部 励治
    • Journal Title

      信学技報EID2001-117 Vol.101 No.600

      Pages: 97-102

    • NAID

      10018990682

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] 高反射率高コントラスト表示可能な電気泳動ディスプレイ2000

    • Author(s)
      服部励治, 原田善弘, 平田啓介
    • Journal Title

      信学技報EID2000-284 Vol.100 No.602

      Pages: 121-125

    • NAID

      10018992216

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Publications] 原田善弘, 山田修平, 服部励治: "マイクロレンズアレイ電気泳動ディスプレイの開発"信学技報. 101. 97-102 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] 服部励治, 原田善弘, 平田啓介: "高反射率高コントラスト表示可能な電気泳動ディスプレイ"信学技報EID2000-284. Vol.100. No.602. 121-125 (2000)

    • Related Report
      2001 Annual Research Report
  • [Publications] 原田 善弘, 山田 修平, 服部 励治: "マイクロレンズアレイ電気泳動ディスプレイの開発"信学技報EID2001-117. Vol.101. No.600. 97-102 (2001)

    • Related Report
      2001 Annual Research Report

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Published: 2001-04-01   Modified: 2016-04-21  

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