Computer graphics processing and selective visual display system – Plural physical display element control system – Display elements arranged in matrix
Reexamination Certificate
2005-05-31
2005-05-31
Tran, Henry N. (Department: 2674)
Computer graphics processing and selective visual display system
Plural physical display element control system
Display elements arranged in matrix
C345S055000, C345S204000, C347S112000, C347S153000, C359S296000, C359S302000, C399S158000, C399S131000, C430S019000, C430S032000, C430S037000
Reexamination Certificate
active
06900789
ABSTRACT:
Disclosed is a reversible image display medium which can be repeatedly used and can display high quality images, in which cells between the two substrates accommodate a dry developer containing at least two kinds of frictionally chargeable dry developing particles having different chargeable polarities and different optical reflection densities; images are displayed by forming an electrostatic latent image corresponding to the image to be formed on one of the two substrates to drive the developing particles in an electrostatic field based on the electrostatic latent image; a developer-facing surface of one of the substrates has a surface resistivity of at least 1×1012ohm/square; a developer-facing surface of the opposite substrate has a surface resistivity from 1×106ohm/square to 1×1012ohm/square; a developer-facing surface of one of the substrates has a surface average median roughness Ra of 0.2 μm to 0.5 μm; and an external surface of the substrate on image observation side has a surface average median roughness Ra of 0.2 μm to 0.7 μm.
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Ikegawa Akihito
Kanazawa Masaharu
Kurita Takaji
Matsuura Masahiko
Mizuno Hiroshi
McDermott Will & Emery LLP
Minolta Co. , Ltd.
Tran Henry N.
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