Image display medium, and image display device equipped with the image display medium

Abstract

An image display medium has: a display substrate that is at least transparent; a back substrate opposing the display substrate with a gap therebetween; at least two or more kinds of moving particle groups that are chargeable and that are different colors, the moving particle groups being enclosed between the display substrate and the back substrate and moving between the substrates in accordance with an electric field formed between the substrates; a transparent liquid for dispersing the moving particles, the transparent liquid being enclosed between the display substrate and the back substrate; and a colored member disposed between the display substrate and the back substrate, and having gaps through which the moving particle groups can move, and being a color that is different from the colors of the moving particle groups.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

Embodiments of the present invention will be described in detail based on the following figures, wherein:

FIG. 1 is a schematic structural view showing an image display device relating to an exemplary embodiment;

FIG. 2 is a schematic structural view showing the image display device relating to the exemplary embodiment;

FIG. 3 is a schematic structural view showing the image display device relating to the exemplary embodiment;

FIG. 4 is a schematic drawing showing the difference in sizes of large-diameter white particles (a colored member) and moving particles;

FIG. 5 is a schematic drawing showing a state in which the large-diameter white particles (the colored member) abut a surface substrate;

FIG. 6 is a schematic drawing showing a state in which the large-diameter white particles (a colored member) of another example abut the surface substrate;

FIG. 7 is a schematic drawing showing a state in which the large-diameter white particles (a colored member) of yet another example abut the surface substrate;

FIG. 8 is a schematic structural view showing another arrangement example of large-diameter white particles (a colored member);

FIG. 9 is a schematic structural view showing yet another arrangement example of the large-diameter white particles (the colored member);

FIG. 10 is a schematic structural view showing still another arrangement example of the large-diameter white particles (the colored member);

FIG. 11 is a schematic structural view showing still yet another arrangement example of the large-diameter white particles (the colored member);

FIG. 12 is a schematic structural view showing another arrangement example of the large-diameter white particles (the colored member);

FIG. 13 is a schematic structural view showing still another arrangement example of the large-diameter white particles (the colored member);

FIG. 14 is a schematic structural view showing yet another arrangement example of the large-diameter white particles (the colored member);

FIG. 15 is a schematic structural view showing an arrangement example of a colored porous member (a colored member);

FIG. 16 is a schematic structural view showing another arrangement example of the colored porous member (the colored member);

FIG. 17 is a schematic structural view showing yet another arrangement example of the colored porous member (the colored member);

FIG. 18 is a schematic structural view showing still another arrangement example of the colored porous member (the colored member);

FIG. 19 is a schematic structural view showing still yet another arrangement example of the colored porous member (the colored member);

FIG. 20 is a plan view showing an electrode pattern of back electrodes;

FIG. 21 is a plan view showing another example of an electrode pattern of back electrodes;

FIG. 22 is a plan view showing yet another example of an electrode pattern of back electrodes;

FIG. 23 is a plan view showing still another example of an electrode pattern of back electrodes;

FIG. 24 is a schematic diagram showing an example of a combination of colors of the moving particles and the colored member of an image display medium in the case of black-and-white display;

FIG. 25 is a schematic diagram showing another example of a combination of colors of the moving particles and the colored member of the image display medium in the case of black-and-white display;

FIG. 26 is a schematic diagram showing an example of a combination of colors of the moving particles and the colored member of the image display medium in the case of color display;

FIG. 27 is a schematic diagram showing another example of a combination of colors of the moving particles and the colored member of the image display medium in the case of color display;

FIG. 28 is a schematic diagram showing yet another example of a combination of colors of the moving particles and the colored member of the image display medium in the case of color display; and

FIG. 29 is a schematic diagram showing still another example of a combination of colors of the moving particles and the colored member of the image display medium in the case of color display.

Claims

1. An image display medium comprising: a display substrate that is at least transparent;a back substrate opposing the display substrate with a gap therebetween;at least two or more kinds of moving particle groups that are chargeable and that are different colors, the moving particle groups being enclosed between the display substrate and the back substrate and moving between the substrates in accordance with an electric field formed between the substrates;a transparent liquid for dispersing the moving particles, the transparent liquid being enclosed between the display substrate and the back substrate; anda colored member disposed between the display substrate and the back substrate, and having gaps through which the moving particle groups can move, and being a color that is different from the colors of the moving particle groups.

2. The image display medium of claim 1, wherein the colored member is structured by a colored particle group whose particles have a volume average particle diameter larger than a volume average particle diameter of particles of the moving particle groups.

3. The image display medium of claim 2, wherein a size of the particles of the colored particle group structuring the colored member is greater than or equal to 10 times the size of the particles of the moving particle groups.

4. The image display medium of claim 2, wherein a surface roughness of the particles of the colored particle group structuring the colored member is greater than the volume average particle diameter of the moving particle groups.

5. The image display medium of claim 2, wherein the particles of the colored particle group structuring the colored member have attached thereto accessory particles whose the volume average particle diameter is smaller than the volume average particle diameter of the particles of the colored particle group and greater than the volume average particle diameter of the particles of the moving particle groups.

6. The image display medium of claim 2, wherein the particles of the colored particle group structuring the colored member have attached thereto, at a covering ratio of 1% to 30%, accessory particles whose the volume average particle diameter is smaller than the volume average particle diameter of the particles of the colored particle group and greater than the volume average particle diameter of the particles of the moving particle groups.

7. The image display medium of claim 2, wherein a transparent porous member, which has through-holes through which the moving particle groups can move, is disposed between the display substrate and the colored particle group structuring the colored member.

8. The image display medium of claim 1, wherein the colored member is structured by a porous member having through-holes through which the moving particle groups can move.

9. The image display medium of claim 1, wherein the colored member is disposed so as to abut the display substrate.

10. The image display medium of claim 1, wherein the colored member is disposed with a gap between the colored member and the display substrate.

11. The image display medium of claim 1, wherein the colored member moves in accordance with an electric field formed between the substrates.

12. The image display medium of claim 1, wherein a color of the colored member is white, and, when there are two kinds of the moving particle groups, the colors thereof are black and a chromatic color.

13. The image display medium of claim 1, wherein a color of the colored member is black, and, when there are two kinds of the moving particle groups, the colors thereof are white and a chromatic color.

14. The image display medium of claim 1, wherein a color of the colored member is a chromatic color, and, when there are two kinds of the moving particle groups, the colors thereof are white and black.

15. The image display medium of claim 1, wherein, when the image display medium is sectioned into at least three cells, combinations of chromatic colors of the moving particles and the colored member in the three cells are combinations of red, green and blue, or combinations of yellow, magenta and cyan.

16. An image display device comprising: the image display medium of claim 1;a first electrode disposed at a display substrate side;a second electrode disposed at a back substrate side; andvoltage applying unit for applying voltage between the first electrode and the second electrode and forming an electric field between the substrates.