Electrophotographic display apparatus

Details Electrophotographic display apparatus Electrophotographic display apparatus

2008-05-27

2008-05-27

Choi, William C (Department: 2873)

Optical: systems and elements

Optical modulator

Light wave temporal modulation

C430S038000

Reexamination Certificate

active

07379229

ABSTRACT:
In an electrophoretic display apparatus, a surface of the charged particle, the dispersion medium, and a surface of an inner wall on which charged particles are to be deposited satisfy any one of the following (A) to (D): (A) the charged particle surface is hydrophilic, the dispersion medium is hydrophobic or is hydrophobic and lipophobic, and the inner wall surface is hydrophilic; (B) the charged particle surface is hydrophobic, the dispersion medium is hydrophilic or is hydrophobic and lipophobic and the inner wall surface is hydrophobic; (C) the charged particle surface is hydrophobic and lipophobic, the dispersion medium is hydrophobic or hydrophilic, and the inner wall surface is hydrophobic, with the proviso that when the dispersion medium is hydrophobic, a difference in hydrophobicity between the dispersion medium and the charged particle surface is larger than a difference in hydrophobicity between the inner wall surface and the charged particle surface; and (D) the charged particle surface is hydrophobic and lipophobic, the dispersion medium is hydrophobic or hydrophilic, and the inner wall surface is hydrophobic and lipophobic.

REFERENCES:
patent: 3804620 (1974-04-01), Wells
patent: 6844958 (2005-01-01), Kawai
patent: 2003/0086149 (2003-05-01), Kawai
patent: 2005/0094247 (2005-05-01), Kanbe
patent: 2001-265261 (2001-09-01), None
patent: 2002-062545 (2002-02-01), None
Patent Abstracts of Japan, vol. 2003, No. 12 of Dec. 5, 2003 for JP 2004-139025.
Patent Abstracts of Japan, vol. 2000, No. 19 of Jun. 5, 2001 for JP 2001-033831.

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