Image display medium, device and method

An image display device, comprising:

• a pair of substrates, at least one of which is substantially transparent, and space defined between them, with some gas disposed in the space;
• a plurality of types of particle groups enclosed in said space defined between said pair of said substrates, each particle type having a charge of a polarity identical in polarity to all of the other types of particle groups, and the types of particle groups having an adhesiveness with respect to said substrates different from one another;
• and
• an electric field generator connected to the substrates for applying an electric field having an intensity according to the average charge amount of a type of particle group for transferring that type of particle group to one of the substrates for displaying a particular color.

An image display device, comprising:

• a pair of substrates defining a space between one another, at least one of which is substantially transparent, some gas disposed in the space between the substrates;
• a display medium including a plurality of types of particle groups enclosed in the space between the substrates so as to be movable between the substrates by applying an electric field, the particle groups having different colors and charge properties;
• an electric field generator which generates an electric field corresponding to an image between the pair of substrates;
• and
• a mounting assembly which detachably mounts the display medium and the electric field generator to each other.

A method for electronically displaying an image, using a pair of substrates, at least one of which is substantially transparent, and space defined between them, with some gas disposed in the space and a plurality of types of particle groups enclosed in said space defined between said pair of said substrates, each particle type having a charge of a polarity identical in polarity to all of the other types of particle groups, and the types of particle groups having an adhesiveness with respect to said substrates different from one another, the method comprising:

• (a) forming a display panel from a plurality of sections in a matrix arrangement, by enclosing each section between a pair of substrates, one substrate of which light substantially passes therethrough in visible wavelengths;
• (b) disposing in each section particles of different colors, with each particle of a color having a charge of a polarity identical and an average electric charge different from particles of other colors;
• and
• (c) applying an electric field in accordance with an image to the sections of the matrix to display the image by electrically adhering particles of selected colors to one of the substrates.