Image display medium, image-forming method and image-forming apparatus capable of repetitive writing on the image display medium

An image-forming apparatus for forming an image on an image display medium, comprising:

• the image display medium comprising a pair of substrates, plural types of particle groups contained between the substrates to be movable therebetween by an applied electric field, the plural types of particle groups being different in color and charging property, and a photoconductive layer being formed on one of the pair of substrates;
• voltage-applying means for applying a voltage between the pair of substrates;
• a transparent panel formed according to a pattern corresponding to the image;
• and
• a light source for irradiating the transparent panel with light.

An image-forming apparatus for forming an image on an image display medium, comprising:

• the image display medium comprising a pair of substrates, and a space defined between them, with at least one of a gas disposed in the space and partial vacuum formed in the space, and plural types of particle groups contained between the substrates to be movable therebetween by an applied electric field, the plural types of the particle groups being different in color and charging property;
• a latent image carrier;
• electrostatic latent image forming means for forming on the latent image carrier an electrostatic latent image corresponding to an image;
• and
• a counter electrode for generating an electric field between itself and the latent image carrier, the counter electrode being mounted in a position facing the latent image carrier such that the image display medium can be positioned therebetween.

An image display medium comprising:

• a first member;
• a second member mounted facing the first member;
• first particles contained in a space formed between the first member and the second member, the first particles being moved toward the first member by an electric field applied between the first member and the second member;
• and
• second particles contained in the space, which are different in color from the first particles, the second particles being moved toward the second member by the electric field applied between the first member and the second member.

An image display medium comprising:

• a first member;
• a second member mounted facing the first member;
• first particles contained in a space formed between the first member and the second member, the first particles being charged positively or negatively;
• and
• second particles contained in the space, which are different in color from the first particles, the second particles being charged opposite in polarity to that of the first particles.

An image display medium comprising:

• a first member;
• a second member mounted facing the first member;
• first particles contained in a space formed between the first member and the second member, the first particles having an insulating property on at least the surfaces thereof and being charged positively;
• and
• second particles contained in the space, which are different in color from the first particles, the second particles having an insulating property on at least the surfaces thereof and being charged negatively.

An image display medium comprising:

• a first member;
• a second member mounted facing the first member;
• first particles contained in a space formed between the first member and the second member, the first particles having an insulating property on at least the surfaces thereof;
• and
• second particles contained in the space, which are different in color from the first particles, the second particles having an electron-transporting property or a hole-transporting property on at least the surfaces thereof.

An image display medium comprising:

• a first member having a conductivity;
• a second member mounted facing the first member and having a hole-transporting property or an electron-transporting property;
• first particles contained in a space formed between the first member and the second member, the first particles having an insulating property on at least the surfaces thereof and being charged positively or negatively;
• and
• second particles contained in the space, which are different in color from the first particles, the second particles having a conductivity on at least the surfaces thereof.

An image display medium comprising:

• a first member having a hole-transporting property;
• a second member mounted facing the first member and having an insulating property or a hole-transporting property;
• first particles contained in a space formed between the first member and the second member, the first particles having a conductivity on at least the surfaces thereof;
• and
• second particles contained in the space, which are different in color from the first particles, the second particles having an insulating property on at least the surfaces thereof and being charged positively or negatively.

An image display medium comprising:

• a first member having an electron-transporting property;
• a second member mounted facing the first member and having an electron-transporting property;
• first particles contained in a space formed between the first member and the second member, the first particles having a conductivity on at least the surfaces thereof;
• and
• second particles contained in the space, which are different in color from the first particles, the second particles having an insulating property on at least the surfaces thereof and being charged positively.

An image display medium comprising:

• a first member having an insulating property or an electron-transporting property;
• a second member mounted facing the first member and having an insulating property;
• first particles contained in a space formed between the first member and the second member, the first particles having a conductivity on at least the surfaces thereof;
• and
• second particles contained in the space, which are different in color from the first particles, the second particles having an insulating property on at least the surfaces thereof and being charged positively or negatively.

An image display medium comprising:

• a first member having an electron-transporting property;
• a second member mounted facing the first member and having an electron-transporting property or an insulating property;
• first particles contained in a space formed between the first member and the second member, the first particles having a hole-transporting property on at least the surfaces thereof and being charged positively;
• and
• second particles contained in the space, which are different in color from the first particles, the second particles having a hole-transporting property on at least the surfaces thereof and being charged negatively.

An image display medium comprising:

• a first member having an insulating property;
• a second member mounted facing the first member and having an insulating property;
• first particles contained in a space formed between the first member and the second member, the first particles having a hole-transporting property on at least the surfaces thereof and being charged positively;
• and
• second particles contained in the space, which are different in color from the first particles, the second particles having a hole-transporting property on at least the surfaces thereof and being charged negatively.

An image display medium comprising:

• a first member;
• a second member mounted facing the first member;
• first particles contained in a space formed between the first member and the second member, the first particles having a hole-transporting property on at least the surfaces thereof;
• and
• second particles contained in the space, which are different in color from the first particles, the second particles having an electron-transporting property on at least the surfaces thereof.

An image display medium comprising:

• a first member having an electron-transporting property or an insulating property;
• a second member mounted facing the first member and having an electron-transporting property or an insulating property;
• first particles contained in a space formed between the first member and the second member, the first particles having a hole-transporting property on at least the surfaces thereof;
• and
• second particles contained in the space, which are different in color from the first particles, the second particles having a conductivity on at least the surfaces thereof.

An image display medium comprising:

• a first member having a hole-transporting property;
• a second member mounted facing the first member and having a hole-transporting property or an insulating property;
• first particles contained in a space formed between the first member and the second member, the first particles having an electron-transporting property on at least the surfaces thereof and being charged positively;
• and
• second particles contained in the space, which are different in color from the first particles, the second particles having an electron-transporting property on at least the surfaces thereof and being charged negatively.

An image display medium comprising:

• a first member having an insulating property;
• a second member mounted facing the first member and having an insulating property;
• first particles contained in a space formed between the first member and the second member, the first particles having an electron-transporting property on at least the surfaces thereof and being charged positively;
• and
• second particles contained in the space, which are different in color from the first particles, the second particles having an electron-transporting property on at least the surfaces thereof and being charged negatively.

An image display medium comprising:

• a first member having a hole-transporting property or an insulating property;
• a second member mounted facing the first member and having an insulating property or a hole-transporting property;
• first particles contained in a space formed between the first member and the second member, the first particles having a conductivity on at least the surfaces thereof;
• and
• second particles contained in the space, which are different in color from the first particles, the second particles having an electron-transporting property on at least the surfaces thereof.

An image display medium comprising:

• a first member having a conductivity;
• a second member mounted facing the first member and having a conductivity or an insulating property;
• first particles contained in a space formed between the first member and the second member, the first particles having a conductivity on at least the surfaces thereof;
• and
• second particles contained in the space, which are different in color from the first particles, the second particles having an insulating property on at least the surfaces thereof.

An image display medium comprising:

• a first member having a hole-transporting property;
• a second member mounted facing the first member and having an electron-transporting property;
• first particles contained in a space formed between the first member and the second member, the first particles having a conductivity on at least the surfaces thereof;
• and
• second particles contained in the space, which are different in color from the first particles, the second particles having an insulating property on at least the surfaces thereof.

An image display medium comprising:

• a first member having a conductivity;
• a second member mounted facing the first member and having a hole-transporting property, a conductivity or an insulating property;
• first particles contained in a space formed between the first member and the second member, the first particles having a conductivity on at least the surfaces thereof;
• and
• second particles contained in the space, which are different in color from the first particles, the second particles having a hole-transporting property on at least the surfaces thereof.

An image display medium comprising:

• a first member having a hole-transporting property;
• a second member mounted facing the first member and having an electron-transporting property;
• first particles contained in a space formed between the first member and the second member, the first particles having a conductivity on at least the surfaces thereof;
• and
• second particles contained in the space, which are different in color from the first particles, the second particles having a hole-transporting property or an electron-transporting property on at least the surfaces thereof.

An image display medium comprising:

• a first member having a conductivity;
• a second member mounted facing the first member and having an electron-transporting property, a conductivity or an insulating property;
• first particles contained in a space formed between the first member and the second member, the first particles having a conductivity on at least the surfaces thereof;
• and
• second particles contained in the space, which are different in color from the first particles, the second particles having an electron-transporting property on at least the surfaces thereof.