Fujitsu Corporation

Naoyuki Hayashi

Mitsuo Ozaki

Toru Takahashi

Fumio Takei

Norio Sawatari

Satoshi Takezawa

Makoto Fukuda

Shino Tokuyo

At least two regions having different colors and electrical characteristics are defined in a rotatable particle. The rotatable particle receives a rotation moment from an external electric field reaction. A base holds rotatably each rotatable particle. An electric field generating unit generates only during a certain electric field generating period an electric field in a spatial area where the rotatable particle is disposed. The intensity of the electric field is monotonously lowered during at least one third of the certain electric field generating period on a backward side of the period. It is possible to reduce a variation in a rotation operation and display a high quality image.

Display device and its driving and manufacturing methods

Provisions of a large screen, thin sheet-like display device capable of realizing usages just like paper, a sphere-like resin body made of two semispheres capable of being manufactured easily, and a microcapsule containing electrophoretic particles capable of being manufactured easily. The sheet-like display device has a sheet-like display layer and at least one layer containing an element for activating the sheet-like display layer, the layers being integrally formed. The sphere-like resin body has first and second portions made of resins, the absolute value of a difference between both the solubility parameters &dgr; and &dgr; of the resins being &verbar;&dgr; &gE;0.2. The phoretic particle-containing microcapsule has a resin shell in which phoretic particles are contained in a core. The diameter of the core is in a range from 10 &mgr;m to 200 &mgr;m and the circumferential length L of the microcapsule is in a range of (4.1&times;T)&lE;L&lE;(20.1&times;T) where T is a Martin diameter of the microcapsule.

Sheet-shaped display, sphere-like resin body, and micro-capsule

Growing community of inventors

Kawasaki, Japan

Naoyuki Hayashi