| US 7,483,201 B2 | ||
| Particles for display media, information display panel and information display device, utilizing the particles for display media | ||
| Norihiko Kaga, Kodaira (Japan); and Toshiaki Arai, Funabashi (Japan) | ||
| Assigned to Bridgestone Corporation, Tokyo (Japan) | ||
| Appl. No. 11/547,962 PCT Filed Mar. 29, 2005, PCT No. PCT/JP2005/005902 § 371(c)(1), (2), (4) Date Oct. 10, 2006, PCT Pub. No. WO2005/098525, PCT Pub. Date Oct. 20, 2005. |
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| Claims priority of application No. 2004-304186 (JP), filed on Oct. 19, 2004; and application No. 2004-115235 (JP), filed on Apr. 09, 1920. | ||
| Prior Publication US 2007/0211018 A1, Sep. 13, 2007 | ||
| Int. Cl. G02B 26/00 (2006.01); G02F 1/03 (2006.01) | ||
| U.S. Cl. 359—296 [359/245] | 5 Claims |
| 1. Particles for display media used for an information display device, wherein the display media are sealed between two opposed
substrates, at least one of which is transparent and wherein the display media, to which an electrostatic field is applied,
are made to move so as to display information such as an image or the like, comprising compound particles of mother particles
and child particles, which are embedded in the surface layer of the mother particles and whose surfaces are exposed;
wherein a particle diameter of a mother particle d0 and a particle diameter of a child particle d1-n are provided with 0.01<d0<50 (μm), 0.01<d1-n<1.00 (μm) and d1-n/d0<0.33 respectively, and average embedding rate W defined below is provided with 0.05<W<0.95;
W=1−((S−S0φ0)/ΣSnφn),
wherein S is superficial area of a compound particle per unit volume,
S0 is superficial area of a mother particle per unit volume, and
Sn is superficial area of a child particle per unit volume.
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