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Encyclopedia > Gyricon

Gyricon is a type of electronic paper developed at the Xerox PARC (Palo Alto Research Center). It has the same properties as paper: It's flexible, contains an image, and is viewable from a wide angle, but it can be erased and written thousands of times. Electronic paper, or e-paper, is a technology that allows the text on a piece of paper to be re-written. ... Xerox Palo Alto Research Center (PARC) was a flagship research division of the Xerox Corporation, based in Palo Alto, California, USA, which essentially created the modern personal computer paper paradigm. ...


A Gyricon sheet is a thin layer of transparent plastic in which millions of small beads, somewhat like toner particles, are randomly dispersed. The beads, each contained in an oil-filled cavity, are free to rotate within those cavities. The beads are "bichromal," with hemispheres of two contrasting colors (e.g. black and white, red and white), and charged so they exhibit an electrical dipole. When voltage is applied to the surface of the sheet, the beads rotate to present one colored side to the viewer. Voltages can be applied to the surface to create images such as text and pictures. The image will persist until new voltage patterns are applied.


See the project description


As of 2005, Xerox closed down the direct subsidiary Gyricon LLC and is focussing on licensing the technology.


  Results from FactBites:
 
Gyricon display containing chemical absorbents - Patent 6396621 (4718 words)
The gyricon sheet according to claim 5, wherein the scavenger layer binder is comprised of a material that is the same as the binder of the gyricon sheet.
Although the exact nature, i.e., chemical make-up, of the contaminants is not known, the inventors have determined that the presence of the contaminants causes the conductivity of the gyricon sheet, and the plasticizing liquid in the cavities surrounding the rotating spheres in particular, to increase rapidly.
Interposed between the gyricon sheet and its adjacent scavenger layer and one of the substrates may be a first grid of parallel electrical conductors, with a corresponding second grid, having parallel electrical conductors oriented orthogonally relative to the conductors of the first grid is then provided between the second substrate and the gyricon sheet.
U.S. Patent: 6128124 - Additive color electric paper without registration or alignment of individual elements - October ... (9555 words)
The gyricon sheet of claim 1 further comprising an opaque backing sheet adjacent to the surface that is not the viewing surface and is situated to be viewed by an observer situated favorably to observe the viewing surface when at least one element is arranged to present the aspect which is substantially optically transparent.
The gyricon sheet of claim 1 wherein the viewing surface is capable of being divided into at least one area having an areal size with respect to the viewing surface wherein the area contains at least one element associated with each component color and approximately the same number of elements associated with each component color.
The gyricon sheet of claim 1 wherein the portion of viewing surface is capable of being divided into at least one area having a minimum size wherein the distribution of elements in the area is substantially the same as the distribution of elements in the portion of the viewing surface.
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